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openwrt-xburst/package/linux/kernel-patches/302-ebtables

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uncompress patches, requested by Kaloz git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@460 3c298f89-4303-0410-b956-a3cf2f4a3e73
2005-03-26 12:33:32 +02:00
diff -Nur linux-mips-cvs/include/linux/if_bridge.h linux-ebtables/include/linux/if_bridge.h
--- linux-mips-cvs/include/linux/if_bridge.h 2000-02-24 01:13:20.000000000 +0100
+++ linux-ebtables/include/linux/if_bridge.h 2005-02-07 05:52:50.000000000 +0100
@@ -102,7 +102,8 @@
struct net_bridge_port;
extern int (*br_ioctl_hook)(unsigned long arg);
-extern void (*br_handle_frame_hook)(struct sk_buff *skb);
+extern int (*br_handle_frame_hook)(struct sk_buff *skb);
+extern int (*br_should_route_hook)(struct sk_buff **pskb);
#endif
diff -Nur linux-mips-cvs/include/linux/netfilter.h linux-ebtables/include/linux/netfilter.h
--- linux-mips-cvs/include/linux/netfilter.h 2005-01-20 03:19:24.000000000 +0100
+++ linux-ebtables/include/linux/netfilter.h 2005-02-07 05:52:50.000000000 +0100
@@ -118,17 +118,23 @@
/* This is gross, but inline doesn't cut it for avoiding the function
call in fast path: gcc doesn't inline (needs value tracking?). --RR */
#ifdef CONFIG_NETFILTER_DEBUG
-#define NF_HOOK nf_hook_slow
+#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
+nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN)
+#define NF_HOOK_THRESH nf_hook_slow
#else
#define NF_HOOK(pf, hook, skb, indev, outdev, okfn) \
(list_empty(&nf_hooks[(pf)][(hook)]) \
? (okfn)(skb) \
- : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn)))
+ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), INT_MIN))
+#define NF_HOOK_THRESH(pf, hook, skb, indev, outdev, okfn, thresh) \
+(list_empty(&nf_hooks[(pf)][(hook)]) \
+ ? (okfn)(skb) \
+ : nf_hook_slow((pf), (hook), (skb), (indev), (outdev), (okfn), (thresh)))
#endif
int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev, struct net_device *outdev,
- int (*okfn)(struct sk_buff *));
+ int (*okfn)(struct sk_buff *), int thresh);
/* Call setsockopt() */
int nf_setsockopt(struct sock *sk, int pf, int optval, char *opt,
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_802_3.h linux-ebtables/include/linux/netfilter_bridge/ebt_802_3.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_802_3.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_802_3.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,60 @@
+#ifndef __LINUX_BRIDGE_EBT_802_3_H
+#define __LINUX_BRIDGE_EBT_802_3_H
+
+#define EBT_802_3_SAP 0x01
+#define EBT_802_3_TYPE 0x02
+
+#define EBT_802_3_MATCH "802_3"
+
+/*
+ * If frame has DSAP/SSAP value 0xaa you must check the SNAP type
+ * to discover what kind of packet we're carrying.
+ */
+#define CHECK_TYPE 0xaa
+
+/*
+ * Control field may be one or two bytes. If the first byte has
+ * the value 0x03 then the entire length is one byte, otherwise it is two.
+ * One byte controls are used in Unnumbered Information frames.
+ * Two byte controls are used in Numbered Information frames.
+ */
+#define IS_UI 0x03
+
+#define EBT_802_3_MASK (EBT_802_3_SAP | EBT_802_3_TYPE | EBT_802_3)
+
+/* ui has one byte ctrl, ni has two */
+struct hdr_ui {
+ uint8_t dsap;
+ uint8_t ssap;
+ uint8_t ctrl;
+ uint8_t orig[3];
+ uint16_t type;
+};
+
+struct hdr_ni {
+ uint8_t dsap;
+ uint8_t ssap;
+ uint16_t ctrl;
+ uint8_t orig[3];
+ uint16_t type;
+};
+
+struct ebt_802_3_hdr {
+ uint8_t daddr[6];
+ uint8_t saddr[6];
+ uint16_t len;
+ union {
+ struct hdr_ui ui;
+ struct hdr_ni ni;
+ } llc;
+};
+
+struct ebt_802_3_info
+{
+ uint8_t sap;
+ uint16_t type;
+ uint8_t bitmask;
+ uint8_t invflags;
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_among.h linux-ebtables/include/linux/netfilter_bridge/ebt_among.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_among.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_among.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,65 @@
+#ifndef __LINUX_BRIDGE_EBT_AMONG_H
+#define __LINUX_BRIDGE_EBT_AMONG_H
+
+#define EBT_AMONG_DST 0x01
+#define EBT_AMONG_SRC 0x02
+
+/* Grzegorz Borowiak <grzes@gnu.univ.gda.pl> 2003
+ *
+ * Write-once-read-many hash table, used for checking if a given
+ * MAC address belongs to a set or not and possibly for checking
+ * if it is related with a given IPv4 address.
+ *
+ * The hash value of an address is its last byte.
+ *
+ * In real-world ethernet addresses, values of the last byte are
+ * evenly distributed and there is no need to consider other bytes.
+ * It would only slow the routines down.
+ *
+ * For MAC address comparison speedup reasons, we introduce a trick.
+ * MAC address is mapped onto an array of two 32-bit integers.
+ * This pair of integers is compared with MAC addresses in the
+ * hash table, which are stored also in form of pairs of integers
+ * (in `cmp' array). This is quick as it requires only two elementary
+ * number comparisons in worst case. Further, we take advantage of
+ * fact that entropy of 3 last bytes of address is larger than entropy
+ * of 3 first bytes. So first we compare 4 last bytes of addresses and
+ * if they are the same we compare 2 first.
+ *
+ * Yes, it is a memory overhead, but in 2003 AD, who cares?
+ */
+
+struct ebt_mac_wormhash_tuple
+{
+ uint32_t cmp[2];
+ uint32_t ip;
+};
+
+struct ebt_mac_wormhash
+{
+ int table[257];
+ int poolsize;
+ struct ebt_mac_wormhash_tuple pool[0];
+};
+
+#define ebt_mac_wormhash_size(x) ((x) ? sizeof(struct ebt_mac_wormhash) \
+ + (x)->poolsize * sizeof(struct ebt_mac_wormhash_tuple) : 0)
+
+struct ebt_among_info
+{
+ int wh_dst_ofs;
+ int wh_src_ofs;
+ int bitmask;
+};
+
+#define EBT_AMONG_DST_NEG 0x1
+#define EBT_AMONG_SRC_NEG 0x2
+
+#define ebt_among_wh_dst(x) ((x)->wh_dst_ofs ? \
+ (struct ebt_mac_wormhash*)((char*)(x) + (x)->wh_dst_ofs) : NULL)
+#define ebt_among_wh_src(x) ((x)->wh_src_ofs ? \
+ (struct ebt_mac_wormhash*)((char*)(x) + (x)->wh_src_ofs) : NULL)
+
+#define EBT_AMONG_MATCH "among"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_arp.h linux-ebtables/include/linux/netfilter_bridge/ebt_arp.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_arp.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_arp.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,32 @@
+#ifndef __LINUX_BRIDGE_EBT_ARP_H
+#define __LINUX_BRIDGE_EBT_ARP_H
+
+#define EBT_ARP_OPCODE 0x01
+#define EBT_ARP_HTYPE 0x02
+#define EBT_ARP_PTYPE 0x04
+#define EBT_ARP_SRC_IP 0x08
+#define EBT_ARP_DST_IP 0x10
+#define EBT_ARP_SRC_MAC 0x20
+#define EBT_ARP_DST_MAC 0x40
+#define EBT_ARP_MASK (EBT_ARP_OPCODE | EBT_ARP_HTYPE | EBT_ARP_PTYPE | \
+ EBT_ARP_SRC_IP | EBT_ARP_DST_IP | EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC)
+#define EBT_ARP_MATCH "arp"
+
+struct ebt_arp_info
+{
+ uint16_t htype;
+ uint16_t ptype;
+ uint16_t opcode;
+ uint32_t saddr;
+ uint32_t smsk;
+ uint32_t daddr;
+ uint32_t dmsk;
+ unsigned char smaddr[ETH_ALEN];
+ unsigned char smmsk[ETH_ALEN];
+ unsigned char dmaddr[ETH_ALEN];
+ unsigned char dmmsk[ETH_ALEN];
+ uint8_t bitmask;
+ uint8_t invflags;
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_arpreply.h linux-ebtables/include/linux/netfilter_bridge/ebt_arpreply.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_arpreply.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_arpreply.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,11 @@
+#ifndef __LINUX_BRIDGE_EBT_ARPREPLY_H
+#define __LINUX_BRIDGE_EBT_ARPREPLY_H
+
+struct ebt_arpreply_info
+{
+ unsigned char mac[ETH_ALEN];
+ int target;
+};
+#define EBT_ARPREPLY_TARGET "arpreply"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_ip.h linux-ebtables/include/linux/netfilter_bridge/ebt_ip.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_ip.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_ip.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,43 @@
+/*
+ * ebt_ip
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ * Changes:
+ * added ip-sport and ip-dport
+ * Innominate Security Technologies AG <mhopf@innominate.com>
+ * September, 2002
+ */
+
+#ifndef __LINUX_BRIDGE_EBT_IP_H
+#define __LINUX_BRIDGE_EBT_IP_H
+
+#define EBT_IP_SOURCE 0x01
+#define EBT_IP_DEST 0x02
+#define EBT_IP_TOS 0x04
+#define EBT_IP_PROTO 0x08
+#define EBT_IP_SPORT 0x10
+#define EBT_IP_DPORT 0x20
+#define EBT_IP_MASK (EBT_IP_SOURCE | EBT_IP_DEST | EBT_IP_TOS | EBT_IP_PROTO |\
+ EBT_IP_SPORT | EBT_IP_DPORT )
+#define EBT_IP_MATCH "ip"
+
+// the same values are used for the invflags
+struct ebt_ip_info
+{
+ uint32_t saddr;
+ uint32_t daddr;
+ uint32_t smsk;
+ uint32_t dmsk;
+ uint8_t tos;
+ uint8_t protocol;
+ uint8_t bitmask;
+ uint8_t invflags;
+ uint16_t sport[2];
+ uint16_t dport[2];
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_limit.h linux-ebtables/include/linux/netfilter_bridge/ebt_limit.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_limit.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_limit.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,23 @@
+#ifndef __LINUX_BRIDGE_EBT_LIMIT_H
+#define __LINUX_BRIDGE_EBT_LIMIT_H
+
+#define EBT_LIMIT_MATCH "limit"
+
+/* timings are in milliseconds. */
+#define EBT_LIMIT_SCALE 10000
+
+/* 1/10,000 sec period => max of 10,000/sec. Min rate is then 429490
+ seconds, or one every 59 hours. */
+
+struct ebt_limit_info
+{
+ u_int32_t avg; /* Average secs between packets * scale */
+ u_int32_t burst; /* Period multiplier for upper limit. */
+
+ /* Used internally by the kernel */
+ unsigned long prev;
+ u_int32_t credit;
+ u_int32_t credit_cap, cost;
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_log.h linux-ebtables/include/linux/netfilter_bridge/ebt_log.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_log.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_log.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,17 @@
+#ifndef __LINUX_BRIDGE_EBT_LOG_H
+#define __LINUX_BRIDGE_EBT_LOG_H
+
+#define EBT_LOG_IP 0x01 // if the frame is made by ip, log the ip information
+#define EBT_LOG_ARP 0x02
+#define EBT_LOG_MASK (EBT_LOG_IP | EBT_LOG_ARP)
+#define EBT_LOG_PREFIX_SIZE 30
+#define EBT_LOG_WATCHER "log"
+
+struct ebt_log_info
+{
+ uint8_t loglevel;
+ uint8_t prefix[EBT_LOG_PREFIX_SIZE];
+ uint32_t bitmask;
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_mark_m.h linux-ebtables/include/linux/netfilter_bridge/ebt_mark_m.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_mark_m.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_mark_m.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,15 @@
+#ifndef __LINUX_BRIDGE_EBT_MARK_M_H
+#define __LINUX_BRIDGE_EBT_MARK_M_H
+
+#define EBT_MARK_AND 0x01
+#define EBT_MARK_OR 0x02
+#define EBT_MARK_MASK (EBT_MARK_AND | EBT_MARK_OR)
+struct ebt_mark_m_info
+{
+ unsigned long mark, mask;
+ uint8_t invert;
+ uint8_t bitmask;
+};
+#define EBT_MARK_MATCH "mark_m"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_mark_t.h linux-ebtables/include/linux/netfilter_bridge/ebt_mark_t.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_mark_t.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_mark_t.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,12 @@
+#ifndef __LINUX_BRIDGE_EBT_MARK_T_H
+#define __LINUX_BRIDGE_EBT_MARK_T_H
+
+struct ebt_mark_t_info
+{
+ unsigned long mark;
+ // EBT_ACCEPT, EBT_DROP or EBT_CONTINUE or EBT_RETURN
+ int target;
+};
+#define EBT_MARK_TARGET "mark"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_nat.h linux-ebtables/include/linux/netfilter_bridge/ebt_nat.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_nat.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_nat.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,13 @@
+#ifndef __LINUX_BRIDGE_EBT_NAT_H
+#define __LINUX_BRIDGE_EBT_NAT_H
+
+struct ebt_nat_info
+{
+ unsigned char mac[ETH_ALEN];
+ // EBT_ACCEPT, EBT_DROP, EBT_CONTINUE or EBT_RETURN
+ int target;
+};
+#define EBT_SNAT_TARGET "snat"
+#define EBT_DNAT_TARGET "dnat"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_pkttype.h linux-ebtables/include/linux/netfilter_bridge/ebt_pkttype.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_pkttype.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_pkttype.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,11 @@
+#ifndef __LINUX_BRIDGE_EBT_PKTTYPE_H
+#define __LINUX_BRIDGE_EBT_PKTTYPE_H
+
+struct ebt_pkttype_info
+{
+ uint8_t pkt_type;
+ uint8_t invert;
+};
+#define EBT_PKTTYPE_MATCH "pkttype"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_redirect.h linux-ebtables/include/linux/netfilter_bridge/ebt_redirect.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_redirect.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_redirect.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,11 @@
+#ifndef __LINUX_BRIDGE_EBT_REDIRECT_H
+#define __LINUX_BRIDGE_EBT_REDIRECT_H
+
+struct ebt_redirect_info
+{
+ // EBT_ACCEPT, EBT_DROP or EBT_CONTINUE or EBT_RETURN
+ int target;
+};
+#define EBT_REDIRECT_TARGET "redirect"
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_stp.h linux-ebtables/include/linux/netfilter_bridge/ebt_stp.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_stp.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_stp.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,46 @@
+#ifndef __LINUX_BRIDGE_EBT_STP_H
+#define __LINUX_BRIDGE_EBT_STP_H
+
+#define EBT_STP_TYPE 0x0001
+
+#define EBT_STP_FLAGS 0x0002
+#define EBT_STP_ROOTPRIO 0x0004
+#define EBT_STP_ROOTADDR 0x0008
+#define EBT_STP_ROOTCOST 0x0010
+#define EBT_STP_SENDERPRIO 0x0020
+#define EBT_STP_SENDERADDR 0x0040
+#define EBT_STP_PORT 0x0080
+#define EBT_STP_MSGAGE 0x0100
+#define EBT_STP_MAXAGE 0x0200
+#define EBT_STP_HELLOTIME 0x0400
+#define EBT_STP_FWDD 0x0800
+
+#define EBT_STP_MASK 0x0fff
+#define EBT_STP_CONFIG_MASK 0x0ffe
+
+#define EBT_STP_MATCH "stp"
+
+struct ebt_stp_config_info
+{
+ uint8_t flags;
+ uint16_t root_priol, root_priou;
+ char root_addr[6], root_addrmsk[6];
+ uint32_t root_costl, root_costu;
+ uint16_t sender_priol, sender_priou;
+ char sender_addr[6], sender_addrmsk[6];
+ uint16_t portl, portu;
+ uint16_t msg_agel, msg_ageu;
+ uint16_t max_agel, max_ageu;
+ uint16_t hello_timel, hello_timeu;
+ uint16_t forward_delayl, forward_delayu;
+};
+
+struct ebt_stp_info
+{
+ uint8_t type;
+ struct ebt_stp_config_info config;
+ uint16_t bitmask;
+ uint16_t invflags;
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_ulog.h linux-ebtables/include/linux/netfilter_bridge/ebt_ulog.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_ulog.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_ulog.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,33 @@
+#ifndef _EBT_ULOG_H
+#define _EBT_ULOG_H
+
+#define EBT_ULOG_DEFAULT_NLGROUP 0
+#define EBT_ULOG_DEFAULT_QTHRESHOLD 1
+#define EBT_ULOG_MAXNLGROUPS 32 /* hardcoded netlink max */
+#define EBT_ULOG_PREFIX_LEN 32
+#define EBT_ULOG_MAX_QLEN 50
+#define EBT_ULOG_WATCHER "ulog"
+
+struct ebt_ulog_info {
+ uint32_t nlgroup;
+ unsigned int cprange;
+ unsigned int qthreshold;
+ char prefix[EBT_ULOG_PREFIX_LEN];
+};
+
+typedef struct ebt_ulog_packet_msg {
+ char indev[IFNAMSIZ];
+ char outdev[IFNAMSIZ];
+ char physindev[IFNAMSIZ];
+ char physoutdev[IFNAMSIZ];
+ char prefix[EBT_ULOG_PREFIX_LEN];
+ struct timeval stamp;
+ unsigned long mark;
+ unsigned int hook;
+ size_t data_len;
+ /* The complete packet, including Ethernet header and perhaps
+ * the VLAN header is appended */
+ unsigned char data[0] __attribute__ ((aligned (__alignof__(int))));
+} ebt_ulog_packet_msg_t;
+
+#endif /* _EBT_ULOG_H */
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebt_vlan.h linux-ebtables/include/linux/netfilter_bridge/ebt_vlan.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebt_vlan.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebt_vlan.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,20 @@
+#ifndef __LINUX_BRIDGE_EBT_VLAN_H
+#define __LINUX_BRIDGE_EBT_VLAN_H
+
+#define EBT_VLAN_ID 0x01
+#define EBT_VLAN_PRIO 0x02
+#define EBT_VLAN_ENCAP 0x04
+#define EBT_VLAN_MASK (EBT_VLAN_ID | EBT_VLAN_PRIO | EBT_VLAN_ENCAP)
+#define EBT_VLAN_MATCH "vlan"
+
+struct ebt_vlan_info {
+ uint16_t id; /* VLAN ID {1-4095} */
+ uint8_t prio; /* VLAN User Priority {0-7} */
+ uint16_t encap; /* VLAN Encapsulated frame code {0-65535} */
+ uint8_t bitmask; /* Args bitmask bit 1=1 - ID arg,
+ bit 2=1 User-Priority arg, bit 3=1 encap*/
+ uint8_t invflags; /* Inverse bitmask bit 1=1 - inversed ID arg,
+ bit 2=1 - inversed Pirority arg */
+};
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge/ebtables.h linux-ebtables/include/linux/netfilter_bridge/ebtables.h
--- linux-mips-cvs/include/linux/netfilter_bridge/ebtables.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_bridge/ebtables.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,361 @@
+/*
+ * ebtables
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * ebtables.c,v 2.0, September, 2002
+ *
+ * This code is stongly inspired on the iptables code which is
+ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
+ */
+
+#ifndef __LINUX_BRIDGE_EFF_H
+#define __LINUX_BRIDGE_EFF_H
+#include <linux/if.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/if_ether.h>
+
+#define EBT_TABLE_MAXNAMELEN 32
+#define EBT_CHAIN_MAXNAMELEN EBT_TABLE_MAXNAMELEN
+#define EBT_FUNCTION_MAXNAMELEN EBT_TABLE_MAXNAMELEN
+
+// verdicts >0 are "branches"
+#define EBT_ACCEPT -1
+#define EBT_DROP -2
+#define EBT_CONTINUE -3
+#define EBT_RETURN -4
+#define NUM_STANDARD_TARGETS 4
+
+struct ebt_counter
+{
+ uint64_t pcnt;
+ uint64_t bcnt;
+};
+
+struct ebt_entries {
+ // this field is always set to zero
+ // See EBT_ENTRY_OR_ENTRIES.
+ // Must be same size as ebt_entry.bitmask
+ unsigned int distinguisher;
+ // the chain name
+ char name[EBT_CHAIN_MAXNAMELEN];
+ // counter offset for this chain
+ unsigned int counter_offset;
+ // one standard (accept, drop, return) per hook
+ int policy;
+ // nr. of entries
+ unsigned int nentries;
+ // entry list
+ char data[0];
+};
+
+// used for the bitmask of struct ebt_entry
+
+// This is a hack to make a difference between an ebt_entry struct and an
+// ebt_entries struct when traversing the entries from start to end.
+// Using this simplifies the code alot, while still being able to use
+// ebt_entries.
+// Contrary, iptables doesn't use something like ebt_entries and therefore uses
+// different techniques for naming the policy and such. So, iptables doesn't
+// need a hack like this.
+#define EBT_ENTRY_OR_ENTRIES 0x01
+// these are the normal masks
+#define EBT_NOPROTO 0x02
+#define EBT_802_3 0x04
+#define EBT_SOURCEMAC 0x08
+#define EBT_DESTMAC 0x10
+#define EBT_F_MASK (EBT_NOPROTO | EBT_802_3 | EBT_SOURCEMAC | EBT_DESTMAC \
+ | EBT_ENTRY_OR_ENTRIES)
+
+#define EBT_IPROTO 0x01
+#define EBT_IIN 0x02
+#define EBT_IOUT 0x04
+#define EBT_ISOURCE 0x8
+#define EBT_IDEST 0x10
+#define EBT_ILOGICALIN 0x20
+#define EBT_ILOGICALOUT 0x40
+#define EBT_INV_MASK (EBT_IPROTO | EBT_IIN | EBT_IOUT | EBT_ILOGICALIN \
+ | EBT_ILOGICALOUT | EBT_ISOURCE | EBT_IDEST)
+
+struct ebt_entry_match
+{
+ union {
+ char name[EBT_FUNCTION_MAXNAMELEN];
+ struct ebt_match *match;
+ } u;
+ // size of data
+ unsigned int match_size;
+ unsigned char data[0];
+};
+
+struct ebt_entry_watcher
+{
+ union {
+ char name[EBT_FUNCTION_MAXNAMELEN];
+ struct ebt_watcher *watcher;
+ } u;
+ // size of data
+ unsigned int watcher_size;
+ unsigned char data[0];
+};
+
+struct ebt_entry_target
+{
+ union {
+ char name[EBT_FUNCTION_MAXNAMELEN];
+ struct ebt_target *target;
+ } u;
+ // size of data
+ unsigned int target_size;
+ unsigned char data[0];
+};
+
+#define EBT_STANDARD_TARGET "standard"
+struct ebt_standard_target
+{
+ struct ebt_entry_target target;
+ int verdict;
+};
+
+// one entry
+struct ebt_entry {
+ // this needs to be the first field
+ unsigned int bitmask;
+ unsigned int invflags;
+ uint16_t ethproto;
+ // the physical in-dev
+ char in[IFNAMSIZ];
+ // the logical in-dev
+ char logical_in[IFNAMSIZ];
+ // the physical out-dev
+ char out[IFNAMSIZ];
+ // the logical out-dev
+ char logical_out[IFNAMSIZ];
+ unsigned char sourcemac[ETH_ALEN];
+ unsigned char sourcemsk[ETH_ALEN];
+ unsigned char destmac[ETH_ALEN];
+ unsigned char destmsk[ETH_ALEN];
+ // sizeof ebt_entry + matches
+ unsigned int watchers_offset;
+ // sizeof ebt_entry + matches + watchers
+ unsigned int target_offset;
+ // sizeof ebt_entry + matches + watchers + target
+ unsigned int next_offset;
+ unsigned char elems[0];
+};
+
+struct ebt_replace
+{
+ char name[EBT_TABLE_MAXNAMELEN];
+ unsigned int valid_hooks;
+ // nr of rules in the table
+ unsigned int nentries;
+ // total size of the entries
+ unsigned int entries_size;
+ // start of the chains
+ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];
+ // nr of counters userspace expects back
+ unsigned int num_counters;
+ // where the kernel will put the old counters
+ struct ebt_counter *counters;
+ char *entries;
+};
+
+// [gs]etsockopt numbers
+#define EBT_BASE_CTL 128
+
+#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
+#define EBT_SO_SET_COUNTERS (EBT_SO_SET_ENTRIES+1)
+#define EBT_SO_SET_MAX (EBT_SO_SET_COUNTERS+1)
+
+#define EBT_SO_GET_INFO (EBT_BASE_CTL)
+#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO+1)
+#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES+1)
+#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO+1)
+#define EBT_SO_GET_MAX (EBT_SO_GET_INIT_ENTRIES+1)
+
+#ifdef __KERNEL__
+
+// return values for match() functions
+#define EBT_MATCH 0
+#define EBT_NOMATCH 1
+
+struct ebt_match
+{
+ struct list_head list;
+ const char name[EBT_FUNCTION_MAXNAMELEN];
+ // 0 == it matches
+ int (*match)(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *matchdata,
+ unsigned int datalen);
+ // 0 == let it in
+ int (*check)(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *matchdata, unsigned int datalen);
+ void (*destroy)(void *matchdata, unsigned int datalen);
+ struct module *me;
+};
+
+struct ebt_watcher
+{
+ struct list_head list;
+ const char name[EBT_FUNCTION_MAXNAMELEN];
+ void (*watcher)(const struct sk_buff *skb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *watcherdata, unsigned int datalen);
+ // 0 == let it in
+ int (*check)(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *watcherdata, unsigned int datalen);
+ void (*destroy)(void *watcherdata, unsigned int datalen);
+ struct module *me;
+};
+
+struct ebt_target
+{
+ struct list_head list;
+ const char name[EBT_FUNCTION_MAXNAMELEN];
+ // returns one of the standard verdicts
+ int (*target)(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *targetdata, unsigned int datalen);
+ // 0 == let it in
+ int (*check)(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *targetdata, unsigned int datalen);
+ void (*destroy)(void *targetdata, unsigned int datalen);
+ struct module *me;
+};
+
+// used for jumping from and into user defined chains (udc)
+struct ebt_chainstack
+{
+ struct ebt_entries *chaininfo; // pointer to chain data
+ struct ebt_entry *e; // pointer to entry data
+ unsigned int n; // n'th entry
+};
+
+struct ebt_table_info
+{
+ // total size of the entries
+ unsigned int entries_size;
+ unsigned int nentries;
+ // pointers to the start of the chains
+ struct ebt_entries *hook_entry[NF_BR_NUMHOOKS];
+ // room to maintain the stack used for jumping from and into udc
+ struct ebt_chainstack **chainstack;
+ char *entries;
+ struct ebt_counter counters[0] ____cacheline_aligned;
+};
+
+struct ebt_table
+{
+ struct list_head list;
+ char name[EBT_TABLE_MAXNAMELEN];
+ struct ebt_replace *table;
+ unsigned int valid_hooks;
+ rwlock_t lock;
+ // e.g. could be the table explicitly only allows certain
+ // matches, targets, ... 0 == let it in
+ int (*check)(const struct ebt_table_info *info,
+ unsigned int valid_hooks);
+ // the data used by the kernel
+ struct ebt_table_info *private;
+};
+
+#define EBT_ALIGN(s) (((s) + (__alignof__(struct ebt_entry_target)-1)) & \
+ ~(__alignof__(struct ebt_entry_target)-1))
+extern int ebt_register_table(struct ebt_table *table);
+extern void ebt_unregister_table(struct ebt_table *table);
+extern int ebt_register_match(struct ebt_match *match);
+extern void ebt_unregister_match(struct ebt_match *match);
+extern int ebt_register_watcher(struct ebt_watcher *watcher);
+extern void ebt_unregister_watcher(struct ebt_watcher *watcher);
+extern int ebt_register_target(struct ebt_target *target);
+extern void ebt_unregister_target(struct ebt_target *target);
+extern unsigned int ebt_do_table(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ struct ebt_table *table);
+
+ // Used in the kernel match() functions
+#define FWINV(bool,invflg) ((bool) ^ !!(info->invflags & invflg))
+// True if the hook mask denotes that the rule is in a base chain,
+// used in the check() functions
+#define BASE_CHAIN (hookmask & (1 << NF_BR_NUMHOOKS))
+// Clear the bit in the hook mask that tells if the rule is on a base chain
+#define CLEAR_BASE_CHAIN_BIT (hookmask &= ~(1 << NF_BR_NUMHOOKS))
+// True if the target is not a standard target
+#define INVALID_TARGET (info->target < -NUM_STANDARD_TARGETS || info->target >= 0)
+
+#endif /* __KERNEL__ */
+
+// blatently stolen from ip_tables.h
+// fn returns 0 to continue iteration
+#define EBT_MATCH_ITERATE(e, fn, args...) \
+({ \
+ unsigned int __i; \
+ int __ret = 0; \
+ struct ebt_entry_match *__match; \
+ \
+ for (__i = sizeof(struct ebt_entry); \
+ __i < (e)->watchers_offset; \
+ __i += __match->match_size + \
+ sizeof(struct ebt_entry_match)) { \
+ __match = (void *)(e) + __i; \
+ \
+ __ret = fn(__match , ## args); \
+ if (__ret != 0) \
+ break; \
+ } \
+ if (__ret == 0) { \
+ if (__i != (e)->watchers_offset) \
+ __ret = -EINVAL; \
+ } \
+ __ret; \
+})
+
+#define EBT_WATCHER_ITERATE(e, fn, args...) \
+({ \
+ unsigned int __i; \
+ int __ret = 0; \
+ struct ebt_entry_watcher *__watcher; \
+ \
+ for (__i = e->watchers_offset; \
+ __i < (e)->target_offset; \
+ __i += __watcher->watcher_size + \
+ sizeof(struct ebt_entry_watcher)) { \
+ __watcher = (void *)(e) + __i; \
+ \
+ __ret = fn(__watcher , ## args); \
+ if (__ret != 0) \
+ break; \
+ } \
+ if (__ret == 0) { \
+ if (__i != (e)->target_offset) \
+ __ret = -EINVAL; \
+ } \
+ __ret; \
+})
+
+#define EBT_ENTRY_ITERATE(entries, size, fn, args...) \
+({ \
+ unsigned int __i; \
+ int __ret = 0; \
+ struct ebt_entry *__entry; \
+ \
+ for (__i = 0; __i < (size);) { \
+ __entry = (void *)(entries) + __i; \
+ __ret = fn(__entry , ## args); \
+ if (__ret != 0) \
+ break; \
+ if (__entry->bitmask != 0) \
+ __i += __entry->next_offset; \
+ else \
+ __i += sizeof(struct ebt_entries); \
+ } \
+ if (__ret == 0) { \
+ if (__i != (size)) \
+ __ret = -EINVAL; \
+ } \
+ __ret; \
+})
+
+#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_bridge.h linux-ebtables/include/linux/netfilter_bridge.h
--- linux-mips-cvs/include/linux/netfilter_bridge.h 2001-08-22 05:25:11.000000000 +0200
+++ linux-ebtables/include/linux/netfilter_bridge.h 2005-02-07 05:52:50.000000000 +0100
@@ -6,6 +6,10 @@
#include <linux/config.h>
#include <linux/netfilter.h>
+#if defined(__KERNEL__) && defined(CONFIG_NETFILTER)
+#include <asm/atomic.h>
+#include <linux/if_ether.h>
+#endif
/* Bridge Hooks */
/* After promisc drops, checksum checks. */
@@ -18,7 +22,76 @@
#define NF_BR_LOCAL_OUT 3
/* Packets about to hit the wire. */
#define NF_BR_POST_ROUTING 4
-#define NF_BR_NUMHOOKS 5
+/* Not really a hook, but used for the ebtables broute table */
+#define NF_BR_BROUTING 5
+#define NF_BR_NUMHOOKS 6
+
+#ifdef __KERNEL__
+
+#define BRNF_PKT_TYPE 0x01
+#define BRNF_BRIDGED_DNAT 0x02
+#define BRNF_DONT_TAKE_PARENT 0x04
+#define BRNF_BRIDGED 0x08
+#define BRNF_NF_BRIDGE_PREROUTING 0x10
+
+enum nf_br_hook_priorities {
+ NF_BR_PRI_FIRST = INT_MIN,
+ NF_BR_PRI_NAT_DST_BRIDGED = -300,
+ NF_BR_PRI_FILTER_BRIDGED = -200,
+ NF_BR_PRI_BRNF = 0,
+ NF_BR_PRI_NAT_DST_OTHER = 100,
+ NF_BR_PRI_FILTER_OTHER = 200,
+ NF_BR_PRI_NAT_SRC = 300,
+ NF_BR_PRI_LAST = INT_MAX,
+};
+
+#ifdef CONFIG_NETFILTER
+static inline
+struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
+{
+ struct nf_bridge_info **nf_bridge = &(skb->nf_bridge);
+
+ if ((*nf_bridge = kmalloc(sizeof(**nf_bridge), GFP_ATOMIC)) != NULL) {
+ atomic_set(&(*nf_bridge)->use, 1);
+ (*nf_bridge)->mask = 0;
+ (*nf_bridge)->physindev = (*nf_bridge)->physoutdev = NULL;
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ (*nf_bridge)->netoutdev = NULL;
+#endif
+ }
+
+ return *nf_bridge;
+}
+
+/* Only used in br_forward.c */
+static inline
+void nf_bridge_maybe_copy_header(struct sk_buff *skb)
+{
+ if (skb->nf_bridge) {
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ memcpy(skb->data - 18, skb->nf_bridge->data, 18);
+ skb_push(skb, 4);
+ } else
+ memcpy(skb->data - 16, skb->nf_bridge->data, 16);
+ }
+}
+
+static inline
+void nf_bridge_save_header(struct sk_buff *skb)
+{
+ int header_size = 16;
+
+ if (skb->protocol == __constant_htons(ETH_P_8021Q))
+ header_size = 18;
+ memcpy(skb->nf_bridge->data, skb->data - header_size, header_size);
+}
+struct bridge_skb_cb {
+ union {
+ __u32 ipv4;
+ } daddr;
+};
+#endif /* CONFIG_NETFILTER */
+#endif /* __KERNEL__ */
#endif
diff -Nur linux-mips-cvs/include/linux/netfilter_ipv4/ipt_physdev.h linux-ebtables/include/linux/netfilter_ipv4/ipt_physdev.h
--- linux-mips-cvs/include/linux/netfilter_ipv4/ipt_physdev.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_ipv4/ipt_physdev.h 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,24 @@
+#ifndef _IPT_PHYSDEV_H
+#define _IPT_PHYSDEV_H
+
+#ifdef __KERNEL__
+#include <linux/if.h>
+#endif
+
+#define IPT_PHYSDEV_OP_IN 0x01
+#define IPT_PHYSDEV_OP_OUT 0x02
+#define IPT_PHYSDEV_OP_BRIDGED 0x04
+#define IPT_PHYSDEV_OP_ISIN 0x08
+#define IPT_PHYSDEV_OP_ISOUT 0x10
+#define IPT_PHYSDEV_OP_MASK (0x20 - 1)
+
+struct ipt_physdev_info {
+ char physindev[IFNAMSIZ];
+ char in_mask[IFNAMSIZ];
+ char physoutdev[IFNAMSIZ];
+ char out_mask[IFNAMSIZ];
+ u_int8_t invert;
+ u_int8_t bitmask;
+};
+
+#endif /*_IPT_PHYSDEV_H*/
diff -Nur linux-mips-cvs/include/linux/netfilter_ipv4.h linux-ebtables/include/linux/netfilter_ipv4.h
--- linux-mips-cvs/include/linux/netfilter_ipv4.h 2002-02-26 07:00:31.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_ipv4.h 2005-02-07 05:52:50.000000000 +0100
@@ -52,8 +52,10 @@
enum nf_ip_hook_priorities {
NF_IP_PRI_FIRST = INT_MIN,
NF_IP_PRI_CONNTRACK = -200,
+ NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
NF_IP_PRI_MANGLE = -150,
NF_IP_PRI_NAT_DST = -100,
+ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
NF_IP_PRI_FILTER = 0,
NF_IP_PRI_NAT_SRC = 100,
NF_IP_PRI_LAST = INT_MAX,
diff -Nur linux-mips-cvs/include/linux/netfilter_ipv6.h linux-ebtables/include/linux/netfilter_ipv6.h
--- linux-mips-cvs/include/linux/netfilter_ipv6.h 2001-01-11 05:02:45.000000000 +0100
+++ linux-ebtables/include/linux/netfilter_ipv6.h 2005-02-07 05:52:50.000000000 +0100
@@ -57,8 +57,10 @@
enum nf_ip6_hook_priorities {
NF_IP6_PRI_FIRST = INT_MIN,
NF_IP6_PRI_CONNTRACK = -200,
+ NF_IP6_PRI_BRIDGE_SABOTAGE_FORWARD = -175,
NF_IP6_PRI_MANGLE = -150,
NF_IP6_PRI_NAT_DST = -100,
+ NF_IP6_PRI_BRIDGE_SABOTAGE_LOCAL_OUT = -50,
NF_IP6_PRI_FILTER = 0,
NF_IP6_PRI_NAT_SRC = 100,
NF_IP6_PRI_LAST = INT_MAX,
diff -Nur linux-mips-cvs/include/linux/skbuff.h linux-ebtables/include/linux/skbuff.h
--- linux-mips-cvs/include/linux/skbuff.h 2005-01-31 12:56:47.000000000 +0100
+++ linux-ebtables/include/linux/skbuff.h 2005-02-07 05:52:50.000000000 +0100
@@ -92,6 +92,20 @@
struct nf_ct_info {
struct nf_conntrack *master;
};
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+struct nf_bridge_info {
+ atomic_t use;
+ struct net_device *physindev;
+ struct net_device *physoutdev;
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ struct net_device *netoutdev;
+#endif
+ unsigned int mask;
+ unsigned long data[32 / sizeof(unsigned long)];
+};
+#endif
+
#endif
struct sk_buff_head {
@@ -208,6 +222,9 @@
#ifdef CONFIG_NETFILTER_DEBUG
unsigned int nf_debug;
#endif
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ struct nf_bridge_info *nf_bridge; /* Saved data about a bridged frame - see br_netfilter.c */
+#endif
#endif /*CONFIG_NETFILTER*/
#if defined(CONFIG_HIPPI)
@@ -1175,6 +1192,20 @@
skb->nf_debug = 0;
#endif
}
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+static inline void nf_bridge_put(struct nf_bridge_info *nf_bridge)
+{
+ if (nf_bridge && atomic_dec_and_test(&nf_bridge->use))
+ kfree(nf_bridge);
+}
+static inline void nf_bridge_get(struct nf_bridge_info *nf_bridge)
+{
+ if (nf_bridge)
+ atomic_inc(&nf_bridge->use);
+}
+#endif
+
#else /* CONFIG_NETFILTER */
static inline void nf_reset(struct sk_buff *skb) {}
#endif /* CONFIG_NETFILTER */
diff -Nur linux-mips-cvs/include/linux/sysctl.h linux-ebtables/include/linux/sysctl.h
--- linux-mips-cvs/include/linux/sysctl.h 2004-11-29 18:47:18.000000000 +0100
+++ linux-ebtables/include/linux/sysctl.h 2005-02-07 05:52:50.000000000 +0100
@@ -608,6 +608,15 @@
NET_DECNET_CONF_DEV_STATE = 7
};
+/* /proc/sys/net/bridge */
+enum {
+ NET_BRIDGE_NF_CALL_ARPTABLES = 1,
+ NET_BRIDGE_NF_CALL_IPTABLES = 2,
+ NET_BRIDGE_NF_CALL_IP6TABLES = 3,
+ NET_BRIDGE_NF_FILTER_VLAN_TAGGED = 4,
+};
+
+
/* CTL_PROC names: */
/* CTL_FS names: */
diff -Nur linux-mips-cvs/include/linux/sysctl.h.orig linux-ebtables/include/linux/sysctl.h.orig
--- linux-mips-cvs/include/linux/sysctl.h.orig 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/include/linux/sysctl.h.orig 2004-11-29 18:47:18.000000000 +0100
@@ -0,0 +1,841 @@
+/*
+ * sysctl.h: General linux system control interface
+ *
+ * Begun 24 March 1995, Stephen Tweedie
+ *
+ ****************************************************************
+ ****************************************************************
+ **
+ ** WARNING:
+ ** The values in this file are exported to user space via
+ ** the sysctl() binary interface. Do *NOT* change the
+ ** numbering of any existing values here, and do not change
+ ** any numbers within any one set of values. If you have
+ ** to redefine an existing interface, use a new number for it.
+ ** The kernel will then return ENOTDIR to any application using
+ ** the old binary interface.
+ **
+ ** --sct
+ **
+ ****************************************************************
+ ****************************************************************
+ */
+
+#ifndef _LINUX_SYSCTL_H
+#define _LINUX_SYSCTL_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/list.h>
+
+struct file;
+
+#define CTL_MAXNAME 10
+
+struct __sysctl_args {
+ int *name;
+ int nlen;
+ void *oldval;
+ size_t *oldlenp;
+ void *newval;
+ size_t newlen;
+ unsigned long __unused[4];
+};
+
+/* Define sysctl names first */
+
+/* Top-level names: */
+
+/* For internal pattern-matching use only: */
+#ifdef __KERNEL__
+#define CTL_ANY -1 /* Matches any name */
+#define CTL_NONE 0
+#endif
+
+enum
+{
+ CTL_KERN=1, /* General kernel info and control */
+ CTL_VM=2, /* VM management */
+ CTL_NET=3, /* Networking */
+ CTL_PROC=4, /* Process info */
+ CTL_FS=5, /* Filesystems */
+ CTL_DEBUG=6, /* Debugging */
+ CTL_DEV=7, /* Devices */
+ CTL_BUS=8, /* Busses */
+ CTL_ABI=9, /* Binary emulation */
+ CTL_CPU=10 /* CPU stuff (speed scaling, etc) */
+};
+
+/* CTL_BUS names: */
+enum
+{
+ CTL_BUS_ISA=1 /* ISA */
+};
+
+/* CTL_KERN names: */
+enum
+{
+ KERN_OSTYPE=1, /* string: system version */
+ KERN_OSRELEASE=2, /* string: system release */
+ KERN_OSREV=3, /* int: system revision */
+ KERN_VERSION=4, /* string: compile time info */
+ KERN_SECUREMASK=5, /* struct: maximum rights mask */
+ KERN_PROF=6, /* table: profiling information */
+ KERN_NODENAME=7,
+ KERN_DOMAINNAME=8,
+
+ KERN_CAP_BSET=14, /* int: capability bounding set */
+ KERN_PANIC=15, /* int: panic timeout */
+ KERN_REALROOTDEV=16, /* real root device to mount after initrd */
+
+ KERN_SPARC_REBOOT=21, /* reboot command on Sparc */
+ KERN_CTLALTDEL=22, /* int: allow ctl-alt-del to reboot */
+ KERN_PRINTK=23, /* struct: control printk logging parameters */
+ KERN_NAMETRANS=24, /* Name translation */
+ KERN_PPC_HTABRECLAIM=25, /* turn htab reclaimation on/off on PPC */
+ KERN_PPC_ZEROPAGED=26, /* turn idle page zeroing on/off on PPC */
+ KERN_PPC_POWERSAVE_NAP=27, /* use nap mode for power saving */
+ KERN_MODPROBE=28,
+ KERN_SG_BIG_BUFF=29,
+ KERN_ACCT=30, /* BSD process accounting parameters */
+ KERN_PPC_L2CR=31, /* l2cr register on PPC */
+
+ KERN_RTSIGNR=32, /* Number of rt sigs queued */
+ KERN_RTSIGMAX=33, /* Max queuable */
+
+ KERN_SHMMAX=34, /* long: Maximum shared memory segment */
+ KERN_MSGMAX=35, /* int: Maximum size of a messege */
+ KERN_MSGMNB=36, /* int: Maximum message queue size */
+ KERN_MSGPOOL=37, /* int: Maximum system message pool size */
+ KERN_SYSRQ=38, /* int: Sysreq enable */
+ KERN_MAX_THREADS=39, /* int: Maximum nr of threads in the system */
+ KERN_RANDOM=40, /* Random driver */
+ KERN_SHMALL=41, /* int: Maximum size of shared memory */
+ KERN_MSGMNI=42, /* int: msg queue identifiers */
+ KERN_SEM=43, /* struct: sysv semaphore limits */
+ KERN_SPARC_STOP_A=44, /* int: Sparc Stop-A enable */
+ KERN_SHMMNI=45, /* int: shm array identifiers */
+ KERN_OVERFLOWUID=46, /* int: overflow UID */
+ KERN_OVERFLOWGID=47, /* int: overflow GID */
+ KERN_SHMPATH=48, /* string: path to shm fs */
+ KERN_HOTPLUG=49, /* string: path to hotplug policy agent */
+ KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */
+ KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */
+ KERN_CORE_USES_PID=52, /* int: use core or core.%pid */
+ KERN_TAINTED=53, /* int: various kernel tainted flags */
+ KERN_CADPID=54, /* int: PID of the process to notify on CAD */
+ KERN_CORE_PATTERN=56, /* string: pattern for core-files */
+ KERN_PPC_L3CR=57, /* l3cr register on PPC */
+ KERN_EXCEPTION_TRACE=58, /* boolean: exception trace */
+ KERN_CORE_SETUID=59, /* int: set to allow core dumps of setuid apps */
+ KERN_SPARC_SCONS_PWROFF=64, /* int: serial console power-off halt */
+};
+
+
+/* CTL_VM names: */
+enum
+{
+ VM_SWAPCTL=1, /* struct: Set vm swapping control */
+ VM_SWAPOUT=2, /* int: Linear or sqrt() swapout for hogs */
+ VM_FREEPG=3, /* struct: Set free page thresholds */
+ VM_BDFLUSH=4, /* struct: Control buffer cache flushing */
+ VM_OVERCOMMIT_MEMORY=5, /* Turn off the virtual memory safety limit */
+ VM_BUFFERMEM=6, /* struct: Set buffer memory thresholds */
+ VM_PAGECACHE=7, /* struct: Set cache memory thresholds */
+ VM_PAGERDAEMON=8, /* struct: Control kswapd behaviour */
+ VM_PGT_CACHE=9, /* struct: Set page table cache parameters */
+ VM_PAGE_CLUSTER=10, /* int: set number of pages to swap together */
+ VM_MAX_MAP_COUNT=11, /* int: Maximum number of active map areas */
+ VM_MIN_READAHEAD=12, /* Min file readahead */
+ VM_MAX_READAHEAD=13, /* Max file readahead */
+ VM_VFS_SCAN_RATIO=14, /* part of the inactive vfs lists to scan */
+ VM_LRU_BALANCE_RATIO=15,/* balance active and inactive caches */
+ VM_PASSES=16, /* number of vm passes before failing */
+ VM_PAGEBUF=17, /* struct: Control pagebuf parameters */
+ VM_GFP_DEBUG=18, /* debug GFP failures */
+ VM_CACHE_SCAN_RATIO=19, /* part of the inactive cache list to scan */
+ VM_MAPPED_RATIO=20, /* amount of unfreeable pages that triggers swapout */
+ VM_LAPTOP_MODE=21, /* kernel in laptop flush mode */
+ VM_BLOCK_DUMP=22, /* dump fs activity to log */
+ VM_ANON_LRU=23, /* immediatly insert anon pages in the vm page lru */
+};
+
+
+/* CTL_NET names: */
+enum
+{
+ NET_CORE=1,
+ NET_ETHER=2,
+ NET_802=3,
+ NET_UNIX=4,
+ NET_IPV4=5,
+ NET_IPX=6,
+ NET_ATALK=7,
+ NET_NETROM=8,
+ NET_AX25=9,
+ NET_BRIDGE=10,
+ NET_ROSE=11,
+ NET_IPV6=12,
+ NET_X25=13,
+ NET_TR=14,
+ NET_DECNET=15,
+ NET_ECONET=16,
+ NET_KHTTPD=17,
+ NET_SCTP=18
+};
+
+/* /proc/sys/kernel/random */
+enum
+{
+ RANDOM_POOLSIZE=1,
+ RANDOM_ENTROPY_COUNT=2,
+ RANDOM_READ_THRESH=3,
+ RANDOM_WRITE_THRESH=4,
+ RANDOM_BOOT_ID=5,
+ RANDOM_UUID=6
+};
+
+/* /proc/sys/bus/isa */
+enum
+{
+ BUS_ISA_MEM_BASE=1,
+ BUS_ISA_PORT_BASE=2,
+ BUS_ISA_PORT_SHIFT=3
+};
+
+/* /proc/sys/net/core */
+enum
+{
+ NET_CORE_WMEM_MAX=1,
+ NET_CORE_RMEM_MAX=2,
+ NET_CORE_WMEM_DEFAULT=3,
+ NET_CORE_RMEM_DEFAULT=4,
+/* was NET_CORE_DESTROY_DELAY */
+ NET_CORE_MAX_BACKLOG=6,
+ NET_CORE_FASTROUTE=7,
+ NET_CORE_MSG_COST=8,
+ NET_CORE_MSG_BURST=9,
+ NET_CORE_OPTMEM_MAX=10,
+ NET_CORE_HOT_LIST_LENGTH=11,
+ NET_CORE_DIVERT_VERSION=12,
+ NET_CORE_NO_CONG_THRESH=13,
+ NET_CORE_NO_CONG=14,
+ NET_CORE_LO_CONG=15,
+ NET_CORE_MOD_CONG=16,
+ NET_CORE_DEV_WEIGHT=17,
+ NET_CORE_SOMAXCONN=18,
+};
+
+/* /proc/sys/net/ethernet */
+
+/* /proc/sys/net/802 */
+
+/* /proc/sys/net/unix */
+
+enum
+{
+ NET_UNIX_DESTROY_DELAY=1,
+ NET_UNIX_DELETE_DELAY=2,
+ NET_UNIX_MAX_DGRAM_QLEN=3,
+};
+
+/* /proc/sys/net/ipv4 */
+enum
+{
+ /* v2.0 compatibile variables */
+ NET_IPV4_FORWARD=8,
+ NET_IPV4_DYNADDR=9,
+
+ NET_IPV4_CONF=16,
+ NET_IPV4_NEIGH=17,
+ NET_IPV4_ROUTE=18,
+ NET_IPV4_FIB_HASH=19,
+ NET_IPV4_NETFILTER=20,
+
+ NET_IPV4_TCP_TIMESTAMPS=33,
+ NET_IPV4_TCP_WINDOW_SCALING=34,
+ NET_IPV4_TCP_SACK=35,
+ NET_IPV4_TCP_RETRANS_COLLAPSE=36,
+ NET_IPV4_DEFAULT_TTL=37,
+ NET_IPV4_AUTOCONFIG=38,
+ NET_IPV4_NO_PMTU_DISC=39,
+ NET_IPV4_TCP_SYN_RETRIES=40,
+ NET_IPV4_IPFRAG_HIGH_THRESH=41,
+ NET_IPV4_IPFRAG_LOW_THRESH=42,
+ NET_IPV4_IPFRAG_TIME=43,
+ NET_IPV4_TCP_MAX_KA_PROBES=44,
+ NET_IPV4_TCP_KEEPALIVE_TIME=45,
+ NET_IPV4_TCP_KEEPALIVE_PROBES=46,
+ NET_IPV4_TCP_RETRIES1=47,
+ NET_IPV4_TCP_RETRIES2=48,
+ NET_IPV4_TCP_FIN_TIMEOUT=49,
+ NET_IPV4_IP_MASQ_DEBUG=50,
+ NET_TCP_SYNCOOKIES=51,
+ NET_TCP_STDURG=52,
+ NET_TCP_RFC1337=53,
+ NET_TCP_SYN_TAILDROP=54,
+ NET_TCP_MAX_SYN_BACKLOG=55,
+ NET_IPV4_LOCAL_PORT_RANGE=56,
+ NET_IPV4_ICMP_ECHO_IGNORE_ALL=57,
+ NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS=58,
+ NET_IPV4_ICMP_SOURCEQUENCH_RATE=59,
+ NET_IPV4_ICMP_DESTUNREACH_RATE=60,
+ NET_IPV4_ICMP_TIMEEXCEED_RATE=61,
+ NET_IPV4_ICMP_PARAMPROB_RATE=62,
+ NET_IPV4_ICMP_ECHOREPLY_RATE=63,
+ NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES=64,
+ NET_IPV4_IGMP_MAX_MEMBERSHIPS=65,
+ NET_TCP_TW_RECYCLE=66,
+ NET_IPV4_ALWAYS_DEFRAG=67,
+ NET_IPV4_TCP_KEEPALIVE_INTVL=68,
+ NET_IPV4_INET_PEER_THRESHOLD=69,
+ NET_IPV4_INET_PEER_MINTTL=70,
+ NET_IPV4_INET_PEER_MAXTTL=71,
+ NET_IPV4_INET_PEER_GC_MINTIME=72,
+ NET_IPV4_INET_PEER_GC_MAXTIME=73,
+ NET_TCP_ORPHAN_RETRIES=74,
+ NET_TCP_ABORT_ON_OVERFLOW=75,
+ NET_TCP_SYNACK_RETRIES=76,
+ NET_TCP_MAX_ORPHANS=77,
+ NET_TCP_MAX_TW_BUCKETS=78,
+ NET_TCP_FACK=79,
+ NET_TCP_REORDERING=80,
+ NET_TCP_ECN=81,
+ NET_TCP_DSACK=82,
+ NET_TCP_MEM=83,
+ NET_TCP_WMEM=84,
+ NET_TCP_RMEM=85,
+ NET_TCP_APP_WIN=86,
+ NET_TCP_ADV_WIN_SCALE=87,
+ NET_IPV4_NONLOCAL_BIND=88,
+ NET_IPV4_ICMP_RATELIMIT=89,
+ NET_IPV4_ICMP_RATEMASK=90,
+ NET_TCP_TW_REUSE=91,
+ NET_TCP_FRTO=92,
+ NET_TCP_LOW_LATENCY=93,
+ NET_IPV4_IPFRAG_SECRET_INTERVAL=94,
+ NET_TCP_WESTWOOD=95,
+ NET_IPV4_IGMP_MAX_MSF=96,
+ NET_TCP_NO_METRICS_SAVE=97,
+ NET_TCP_VEGAS=98,
+ NET_TCP_VEGAS_ALPHA=99,
+ NET_TCP_VEGAS_BETA=100,
+ NET_TCP_VEGAS_GAMMA=101,
+ NET_TCP_BIC=102,
+ NET_TCP_BIC_FAST_CONVERGENCE=103,
+ NET_TCP_BIC_LOW_WINDOW=104,
+ NET_TCP_DEFAULT_WIN_SCALE=105,
+ NET_TCP_MODERATE_RCVBUF=106,
+};
+
+enum {
+ NET_IPV4_ROUTE_FLUSH=1,
+ NET_IPV4_ROUTE_MIN_DELAY=2,
+ NET_IPV4_ROUTE_MAX_DELAY=3,
+ NET_IPV4_ROUTE_GC_THRESH=4,
+ NET_IPV4_ROUTE_MAX_SIZE=5,
+ NET_IPV4_ROUTE_GC_MIN_INTERVAL=6,
+ NET_IPV4_ROUTE_GC_TIMEOUT=7,
+ NET_IPV4_ROUTE_GC_INTERVAL=8,
+ NET_IPV4_ROUTE_REDIRECT_LOAD=9,
+ NET_IPV4_ROUTE_REDIRECT_NUMBER=10,
+ NET_IPV4_ROUTE_REDIRECT_SILENCE=11,
+ NET_IPV4_ROUTE_ERROR_COST=12,
+ NET_IPV4_ROUTE_ERROR_BURST=13,
+ NET_IPV4_ROUTE_GC_ELASTICITY=14,
+ NET_IPV4_ROUTE_MTU_EXPIRES=15,
+ NET_IPV4_ROUTE_MIN_PMTU=16,
+ NET_IPV4_ROUTE_MIN_ADVMSS=17,
+ NET_IPV4_ROUTE_SECRET_INTERVAL=18,
+};
+
+enum
+{
+ NET_PROTO_CONF_ALL=-2,
+ NET_PROTO_CONF_DEFAULT=-3
+
+ /* And device ifindices ... */
+};
+
+enum
+{
+ NET_IPV4_CONF_FORWARDING=1,
+ NET_IPV4_CONF_MC_FORWARDING=2,
+ NET_IPV4_CONF_PROXY_ARP=3,
+ NET_IPV4_CONF_ACCEPT_REDIRECTS=4,
+ NET_IPV4_CONF_SECURE_REDIRECTS=5,
+ NET_IPV4_CONF_SEND_REDIRECTS=6,
+ NET_IPV4_CONF_SHARED_MEDIA=7,
+ NET_IPV4_CONF_RP_FILTER=8,
+ NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE=9,
+ NET_IPV4_CONF_BOOTP_RELAY=10,
+ NET_IPV4_CONF_LOG_MARTIANS=11,
+ NET_IPV4_CONF_TAG=12,
+ NET_IPV4_CONF_ARPFILTER=13,
+ NET_IPV4_CONF_MEDIUM_ID=14,
+ NET_IPV4_CONF_FORCE_IGMP_VERSION=17,
+ NET_IPV4_CONF_ARP_ANNOUNCE=18,
+ NET_IPV4_CONF_ARP_IGNORE=19,
+};
+
+/* /proc/sys/net/ipv4/netfilter */
+enum
+{
+ NET_IPV4_NF_CONNTRACK_MAX=1,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT=2,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV=3,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED=4,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT=5,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT=6,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK=7,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT=8,
+ NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE=9,
+ NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT=10,
+ NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM=11,
+ NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT=12,
+ NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT=13,
+ NET_IPV4_NF_CONNTRACK_BUCKETS=14,
+};
+
+/* /proc/sys/net/ipv6 */
+enum {
+ NET_IPV6_CONF=16,
+ NET_IPV6_NEIGH=17,
+ NET_IPV6_ROUTE=18,
+ NET_IPV6_ICMP=19,
+ NET_IPV6_BINDV6ONLY=20,
+ NET_IPV6_MLD_MAX_MSF=25,
+};
+
+enum {
+ NET_IPV6_ROUTE_FLUSH=1,
+ NET_IPV6_ROUTE_GC_THRESH=2,
+ NET_IPV6_ROUTE_MAX_SIZE=3,
+ NET_IPV6_ROUTE_GC_MIN_INTERVAL=4,
+ NET_IPV6_ROUTE_GC_TIMEOUT=5,
+ NET_IPV6_ROUTE_GC_INTERVAL=6,
+ NET_IPV6_ROUTE_GC_ELASTICITY=7,
+ NET_IPV6_ROUTE_MTU_EXPIRES=8,
+ NET_IPV6_ROUTE_MIN_ADVMSS=9
+};
+
+enum {
+ NET_IPV6_FORWARDING=1,
+ NET_IPV6_HOP_LIMIT=2,
+ NET_IPV6_MTU=3,
+ NET_IPV6_ACCEPT_RA=4,
+ NET_IPV6_ACCEPT_REDIRECTS=5,
+ NET_IPV6_AUTOCONF=6,
+ NET_IPV6_DAD_TRANSMITS=7,
+ NET_IPV6_RTR_SOLICITS=8,
+ NET_IPV6_RTR_SOLICIT_INTERVAL=9,
+ NET_IPV6_RTR_SOLICIT_DELAY=10
+};
+
+/* /proc/sys/net/ipv6/icmp */
+enum {
+ NET_IPV6_ICMP_RATELIMIT=1
+};
+
+/* /proc/sys/net/<protocol>/neigh/<dev> */
+enum {
+ NET_NEIGH_MCAST_SOLICIT=1,
+ NET_NEIGH_UCAST_SOLICIT=2,
+ NET_NEIGH_APP_SOLICIT=3,
+ NET_NEIGH_RETRANS_TIME=4,
+ NET_NEIGH_REACHABLE_TIME=5,
+ NET_NEIGH_DELAY_PROBE_TIME=6,
+ NET_NEIGH_GC_STALE_TIME=7,
+ NET_NEIGH_UNRES_QLEN=8,
+ NET_NEIGH_PROXY_QLEN=9,
+ NET_NEIGH_ANYCAST_DELAY=10,
+ NET_NEIGH_PROXY_DELAY=11,
+ NET_NEIGH_LOCKTIME=12,
+ NET_NEIGH_GC_INTERVAL=13,
+ NET_NEIGH_GC_THRESH1=14,
+ NET_NEIGH_GC_THRESH2=15,
+ NET_NEIGH_GC_THRESH3=16
+};
+
+/* /proc/sys/net/ipx */
+enum {
+ NET_IPX_PPROP_BROADCASTING=1,
+ NET_IPX_FORWARDING=2
+};
+
+
+/* /proc/sys/net/appletalk */
+enum {
+ NET_ATALK_AARP_EXPIRY_TIME=1,
+ NET_ATALK_AARP_TICK_TIME=2,
+ NET_ATALK_AARP_RETRANSMIT_LIMIT=3,
+ NET_ATALK_AARP_RESOLVE_TIME=4
+};
+
+
+/* /proc/sys/net/netrom */
+enum {
+ NET_NETROM_DEFAULT_PATH_QUALITY=1,
+ NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER=2,
+ NET_NETROM_NETWORK_TTL_INITIALISER=3,
+ NET_NETROM_TRANSPORT_TIMEOUT=4,
+ NET_NETROM_TRANSPORT_MAXIMUM_TRIES=5,
+ NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY=6,
+ NET_NETROM_TRANSPORT_BUSY_DELAY=7,
+ NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE=8,
+ NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT=9,
+ NET_NETROM_ROUTING_CONTROL=10,
+ NET_NETROM_LINK_FAILS_COUNT=11
+};
+
+/* /proc/sys/net/ax25 */
+enum {
+ NET_AX25_IP_DEFAULT_MODE=1,
+ NET_AX25_DEFAULT_MODE=2,
+ NET_AX25_BACKOFF_TYPE=3,
+ NET_AX25_CONNECT_MODE=4,
+ NET_AX25_STANDARD_WINDOW=5,
+ NET_AX25_EXTENDED_WINDOW=6,
+ NET_AX25_T1_TIMEOUT=7,
+ NET_AX25_T2_TIMEOUT=8,
+ NET_AX25_T3_TIMEOUT=9,
+ NET_AX25_IDLE_TIMEOUT=10,
+ NET_AX25_N2=11,
+ NET_AX25_PACLEN=12,
+ NET_AX25_PROTOCOL=13,
+ NET_AX25_DAMA_SLAVE_TIMEOUT=14
+};
+
+/* /proc/sys/net/rose */
+enum {
+ NET_ROSE_RESTART_REQUEST_TIMEOUT=1,
+ NET_ROSE_CALL_REQUEST_TIMEOUT=2,
+ NET_ROSE_RESET_REQUEST_TIMEOUT=3,
+ NET_ROSE_CLEAR_REQUEST_TIMEOUT=4,
+ NET_ROSE_ACK_HOLD_BACK_TIMEOUT=5,
+ NET_ROSE_ROUTING_CONTROL=6,
+ NET_ROSE_LINK_FAIL_TIMEOUT=7,
+ NET_ROSE_MAX_VCS=8,
+ NET_ROSE_WINDOW_SIZE=9,
+ NET_ROSE_NO_ACTIVITY_TIMEOUT=10
+};
+
+/* /proc/sys/net/x25 */
+enum {
+ NET_X25_RESTART_REQUEST_TIMEOUT=1,
+ NET_X25_CALL_REQUEST_TIMEOUT=2,
+ NET_X25_RESET_REQUEST_TIMEOUT=3,
+ NET_X25_CLEAR_REQUEST_TIMEOUT=4,
+ NET_X25_ACK_HOLD_BACK_TIMEOUT=5
+};
+
+/* /proc/sys/net/token-ring */
+enum
+{
+ NET_TR_RIF_TIMEOUT=1
+};
+
+/* /proc/sys/net/decnet/ */
+enum {
+ NET_DECNET_NODE_TYPE = 1,
+ NET_DECNET_NODE_ADDRESS = 2,
+ NET_DECNET_NODE_NAME = 3,
+ NET_DECNET_DEFAULT_DEVICE = 4,
+ NET_DECNET_TIME_WAIT = 5,
+ NET_DECNET_DN_COUNT = 6,
+ NET_DECNET_DI_COUNT = 7,
+ NET_DECNET_DR_COUNT = 8,
+ NET_DECNET_DST_GC_INTERVAL = 9,
+ NET_DECNET_CONF = 10,
+ NET_DECNET_NO_FC_MAX_CWND = 11,
+ NET_DECNET_DEBUG_LEVEL = 255
+};
+
+/* /proc/sys/net/sctp */
+enum {
+ NET_SCTP_RTO_INITIAL = 1,
+ NET_SCTP_RTO_MIN = 2,
+ NET_SCTP_RTO_MAX = 3,
+ NET_SCTP_RTO_ALPHA = 4,
+ NET_SCTP_RTO_BETA = 5,
+ NET_SCTP_VALID_COOKIE_LIFE = 6,
+ NET_SCTP_ASSOCIATION_MAX_RETRANS = 7,
+ NET_SCTP_PATH_MAX_RETRANS = 8,
+ NET_SCTP_MAX_INIT_RETRANSMITS = 9,
+ NET_SCTP_HB_INTERVAL = 10,
+ NET_SCTP_PRESERVE_ENABLE = 11,
+ NET_SCTP_MAX_BURST = 12,
+ NET_SCTP_ADDIP_ENABLE = 13,
+ NET_SCTP_PRSCTP_ENABLE = 14,
+};
+/* /proc/sys/net/khttpd/ */
+enum {
+ NET_KHTTPD_DOCROOT = 1,
+ NET_KHTTPD_START = 2,
+ NET_KHTTPD_STOP = 3,
+ NET_KHTTPD_UNLOAD = 4,
+ NET_KHTTPD_CLIENTPORT = 5,
+ NET_KHTTPD_PERMREQ = 6,
+ NET_KHTTPD_PERMFORBID = 7,
+ NET_KHTTPD_LOGGING = 8,
+ NET_KHTTPD_SERVERPORT = 9,
+ NET_KHTTPD_DYNAMICSTRING= 10,
+ NET_KHTTPD_SLOPPYMIME = 11,
+ NET_KHTTPD_THREADS = 12,
+ NET_KHTTPD_MAXCONNECT = 13
+};
+
+/* /proc/sys/net/decnet/conf/<dev> */
+enum {
+ NET_DECNET_CONF_LOOPBACK = -2,
+ NET_DECNET_CONF_DDCMP = -3,
+ NET_DECNET_CONF_PPP = -4,
+ NET_DECNET_CONF_X25 = -5,
+ NET_DECNET_CONF_GRE = -6,
+ NET_DECNET_CONF_ETHER = -7
+
+ /* ... and ifindex of devices */
+};
+
+/* /proc/sys/net/decnet/conf/<dev>/ */
+enum {
+ NET_DECNET_CONF_DEV_PRIORITY = 1,
+ NET_DECNET_CONF_DEV_T1 = 2,
+ NET_DECNET_CONF_DEV_T2 = 3,
+ NET_DECNET_CONF_DEV_T3 = 4,
+ NET_DECNET_CONF_DEV_FORWARDING = 5,
+ NET_DECNET_CONF_DEV_BLKSIZE = 6,
+ NET_DECNET_CONF_DEV_STATE = 7
+};
+
+/* CTL_PROC names: */
+
+/* CTL_FS names: */
+enum
+{
+ FS_NRINODE=1, /* int:current number of allocated inodes */
+ FS_STATINODE=2,
+ FS_MAXINODE=3, /* int:maximum number of inodes that can be allocated */
+ FS_NRDQUOT=4, /* int:current number of allocated dquots */
+ /* was FS_MAXDQUOT */
+ FS_NRFILE=6, /* int:current number of allocated filedescriptors */
+ FS_MAXFILE=7, /* int:maximum number of filedescriptors that can be allocated */
+ FS_DENTRY=8,
+ FS_NRSUPER=9, /* int:current number of allocated super_blocks */
+ FS_MAXSUPER=10, /* int:maximum number of super_blocks that can be allocated */
+ FS_OVERFLOWUID=11, /* int: overflow UID */
+ FS_OVERFLOWGID=12, /* int: overflow GID */
+ FS_LEASES=13, /* int: leases enabled */
+ FS_DIR_NOTIFY=14, /* int: directory notification enabled */
+ FS_LEASE_TIME=15, /* int: maximum time to wait for a lease break */
+ FS_DQSTATS=16, /* dir: disc quota usage statistics and settings */
+ FS_XFS=17, /* struct: control xfs parameters */
+};
+
+/* /proc/sys/fs/quota/ */
+enum {
+ FS_DQ_LOOKUPS = 1,
+ FS_DQ_DROPS = 2,
+ FS_DQ_READS = 3,
+ FS_DQ_WRITES = 4,
+ FS_DQ_CACHE_HITS = 5,
+ FS_DQ_ALLOCATED = 6,
+ FS_DQ_FREE = 7,
+ FS_DQ_SYNCS = 8,
+ FS_DQ_WARNINGS = 9,
+};
+
+/* CTL_DEBUG names: */
+
+/* CTL_DEV names: */
+enum {
+ DEV_CDROM=1,
+ DEV_HWMON=2,
+ DEV_PARPORT=3,
+ DEV_RAID=4,
+ DEV_MAC_HID=5
+};
+
+/* /proc/sys/dev/cdrom */
+enum {
+ DEV_CDROM_INFO=1,
+ DEV_CDROM_AUTOCLOSE=2,
+ DEV_CDROM_AUTOEJECT=3,
+ DEV_CDROM_DEBUG=4,
+ DEV_CDROM_LOCK=5,
+ DEV_CDROM_CHECK_MEDIA=6
+};
+
+/* /proc/sys/dev/parport */
+enum {
+ DEV_PARPORT_DEFAULT=-3
+};
+
+/* /proc/sys/dev/raid */
+enum {
+ DEV_RAID_SPEED_LIMIT_MIN=1,
+ DEV_RAID_SPEED_LIMIT_MAX=2
+};
+
+/* /proc/sys/dev/parport/default */
+enum {
+ DEV_PARPORT_DEFAULT_TIMESLICE=1,
+ DEV_PARPORT_DEFAULT_SPINTIME=2
+};
+
+/* /proc/sys/dev/parport/parport n */
+enum {
+ DEV_PARPORT_SPINTIME=1,
+ DEV_PARPORT_BASE_ADDR=2,
+ DEV_PARPORT_IRQ=3,
+ DEV_PARPORT_DMA=4,
+ DEV_PARPORT_MODES=5,
+ DEV_PARPORT_DEVICES=6,
+ DEV_PARPORT_AUTOPROBE=16
+};
+
+/* /proc/sys/dev/parport/parport n/devices/ */
+enum {
+ DEV_PARPORT_DEVICES_ACTIVE=-3,
+};
+
+/* /proc/sys/dev/parport/parport n/devices/device n */
+enum {
+ DEV_PARPORT_DEVICE_TIMESLICE=1,
+};
+
+/* /proc/sys/dev/mac_hid */
+enum {
+ DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES=1,
+ DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES=2,
+ DEV_MAC_HID_MOUSE_BUTTON_EMULATION=3,
+ DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE=4,
+ DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE=5,
+ DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES=6
+};
+
+/* /proc/sys/abi */
+enum
+{
+ ABI_DEFHANDLER_COFF=1, /* default handler for coff binaries */
+ ABI_DEFHANDLER_ELF=2, /* default handler for ELF binaries */
+ ABI_DEFHANDLER_LCALL7=3,/* default handler for procs using lcall7 */
+ ABI_DEFHANDLER_LIBCSO=4,/* default handler for an libc.so ELF interp */
+ ABI_TRACE=5, /* tracing flags */
+ ABI_FAKE_UTSNAME=6, /* fake target utsname information */
+};
+
+#ifdef __KERNEL__
+
+extern asmlinkage long sys_sysctl(struct __sysctl_args *);
+extern void sysctl_init(void);
+
+typedef struct ctl_table ctl_table;
+
+typedef int ctl_handler (ctl_table *table, int *name, int nlen,
+ void *oldval, size_t *oldlenp,
+ void *newval, size_t newlen,
+ void **context);
+
+typedef int proc_handler (ctl_table *ctl, int write, struct file * filp,
+ void *buffer, size_t *lenp);
+
+extern int proc_dostring(ctl_table *, int, struct file *,
+ void *, size_t *);
+extern int proc_dointvec(ctl_table *, int, struct file *,
+ void *, size_t *);
+extern int proc_dointvec_bset(ctl_table *, int, struct file *,
+ void *, size_t *);
+extern int proc_dointvec_minmax(ctl_table *, int, struct file *,
+ void *, size_t *);
+extern int proc_dointvec_jiffies(ctl_table *, int, struct file *,
+ void *, size_t *);
+extern int proc_doulongvec_minmax(ctl_table *, int, struct file *,
+ void *, size_t *);
+extern int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int,
+ struct file *, void *, size_t *);
+
+extern int do_sysctl (int *name, int nlen,
+ void *oldval, size_t *oldlenp,
+ void *newval, size_t newlen);
+
+extern int do_sysctl_strategy (ctl_table *table,
+ int *name, int nlen,
+ void *oldval, size_t *oldlenp,
+ void *newval, size_t newlen, void ** context);
+
+extern ctl_handler sysctl_string;
+extern ctl_handler sysctl_intvec;
+extern ctl_handler sysctl_jiffies;
+
+
+/*
+ * Register a set of sysctl names by calling register_sysctl_table
+ * with an initialised array of ctl_table's. An entry with zero
+ * ctl_name terminates the table. table->de will be set up by the
+ * registration and need not be initialised in advance.
+ *
+ * sysctl names can be mirrored automatically under /proc/sys. The
+ * procname supplied controls /proc naming.
+ *
+ * The table's mode will be honoured both for sys_sysctl(2) and
+ * proc-fs access.
+ *
+ * Leaf nodes in the sysctl tree will be represented by a single file
+ * under /proc; non-leaf nodes will be represented by directories. A
+ * null procname disables /proc mirroring at this node.
+ *
+ * sysctl(2) can automatically manage read and write requests through
+ * the sysctl table. The data and maxlen fields of the ctl_table
+ * struct enable minimal validation of the values being written to be
+ * performed, and the mode field allows minimal authentication.
+ *
+ * More sophisticated management can be enabled by the provision of a
+ * strategy routine with the table entry. This will be called before
+ * any automatic read or write of the data is performed.
+ *
+ * The strategy routine may return:
+ * <0: Error occurred (error is passed to user process)
+ * 0: OK - proceed with automatic read or write.
+ * >0: OK - read or write has been done by the strategy routine, so
+ * return immediately.
+ *
+ * There must be a proc_handler routine for any terminal nodes
+ * mirrored under /proc/sys (non-terminals are handled by a built-in
+ * directory handler). Several default handlers are available to
+ * cover common cases.
+ */
+
+/* A sysctl table is an array of struct ctl_table: */
+struct ctl_table
+{
+ int ctl_name; /* Binary ID */
+ const char *procname; /* Text ID for /proc/sys, or zero */
+ void *data;
+ int maxlen;
+ mode_t mode;
+ ctl_table *child;
+ proc_handler *proc_handler; /* Callback for text formatting */
+ ctl_handler *strategy; /* Callback function for all r/w */
+ struct proc_dir_entry *de; /* /proc control block */
+ void *extra1;
+ void *extra2;
+};
+
+/* struct ctl_table_header is used to maintain dynamic lists of
+ ctl_table trees. */
+struct ctl_table_header
+{
+ ctl_table *ctl_table;
+ struct list_head ctl_entry;
+};
+
+struct ctl_table_header * register_sysctl_table(ctl_table * table,
+ int insert_at_head);
+void unregister_sysctl_table(struct ctl_table_header * table);
+
+#else /* __KERNEL__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_SYSCTL_H */
diff -Nur linux-mips-cvs/net/8021q/vlan_dev.c linux-ebtables/net/8021q/vlan_dev.c
--- linux-mips-cvs/net/8021q/vlan_dev.c 2004-11-29 18:47:19.000000000 +0100
+++ linux-ebtables/net/8021q/vlan_dev.c 2005-02-07 05:52:50.000000000 +0100
@@ -488,6 +488,10 @@
stats->tx_packets++; /* for statics only */
stats->tx_bytes += skb->len;
+ skb->protocol = __constant_htons(ETH_P_8021Q);
+ skb->mac.raw -= VLAN_HLEN;
+ skb->nh.raw -= VLAN_HLEN;
+
skb->dev = VLAN_DEV_INFO(dev)->real_dev;
dev_queue_xmit(skb);
diff -Nur linux-mips-cvs/net/Config.in linux-ebtables/net/Config.in
--- linux-mips-cvs/net/Config.in 2005-01-09 20:34:04.000000000 +0100
+++ linux-ebtables/net/Config.in 2005-02-07 05:52:50.000000000 +0100
@@ -70,6 +70,9 @@
source net/decnet/Config.in
fi
dep_tristate '802.1d Ethernet Bridging' CONFIG_BRIDGE $CONFIG_INET
+if [ "$CONFIG_BRIDGE" != "n" -a "$CONFIG_NETFILTER" != "n" ]; then
+ source net/bridge/netfilter/Config.in
+fi
if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
tristate 'CCITT X.25 Packet Layer (EXPERIMENTAL)' CONFIG_X25
tristate 'LAPB Data Link Driver (EXPERIMENTAL)' CONFIG_LAPB
diff -Nur linux-mips-cvs/net/Config.in.orig linux-ebtables/net/Config.in.orig
--- linux-mips-cvs/net/Config.in.orig 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/Config.in.orig 2005-01-09 20:34:04.000000000 +0100
@@ -0,0 +1,107 @@
+#
+# Network configuration
+#
+mainmenu_option next_comment
+comment 'Networking options'
+tristate 'Packet socket' CONFIG_PACKET
+if [ "$CONFIG_PACKET" != "n" ]; then
+ bool ' Packet socket: mmapped IO' CONFIG_PACKET_MMAP
+fi
+
+tristate 'Netlink device emulation' CONFIG_NETLINK_DEV
+
+bool 'Network packet filtering (replaces ipchains)' CONFIG_NETFILTER
+if [ "$CONFIG_NETFILTER" = "y" ]; then
+ bool ' Network packet filtering debugging' CONFIG_NETFILTER_DEBUG
+fi
+bool 'Socket Filtering' CONFIG_FILTER
+tristate 'Unix domain sockets' CONFIG_UNIX
+bool 'TCP/IP networking' CONFIG_INET
+if [ "$CONFIG_INET" = "y" ]; then
+ source net/ipv4/Config.in
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+# IPv6 as module will cause a CRASH if you try to unload it
+ tristate ' The IPv6 protocol (EXPERIMENTAL)' CONFIG_IPV6
+ if [ "$CONFIG_IPV6" != "n" ]; then
+ source net/ipv6/Config.in
+ fi
+ fi
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ source net/khttpd/Config.in
+ fi
+ if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ source net/sctp/Config.in
+ fi
+fi
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate 'Asynchronous Transfer Mode (ATM) (EXPERIMENTAL)' CONFIG_ATM
+ if [ "$CONFIG_ATM" = "y" -o "$CONFIG_ATM" = "m" ]; then
+ if [ "$CONFIG_INET" = "y" ]; then
+ dep_tristate ' Classical IP over ATM' CONFIG_ATM_CLIP $CONFIG_ATM
+ if [ "$CONFIG_ATM_CLIP" != "n" ]; then
+ bool ' Do NOT send ICMP if no neighbour' CONFIG_ATM_CLIP_NO_ICMP
+ fi
+ fi
+ dep_tristate ' LAN Emulation (LANE) support' CONFIG_ATM_LANE $CONFIG_ATM
+ if [ "$CONFIG_INET" = "y" -a "$CONFIG_ATM_LANE" != "n" ]; then
+ tristate ' Multi-Protocol Over ATM (MPOA) support' CONFIG_ATM_MPOA
+ fi
+ dep_tristate ' RFC1483/2684 Bridged protocols' CONFIG_ATM_BR2684 $CONFIG_ATM
+ if [ "$CONFIG_ATM_BR2684" != "n" ]; then
+ bool ' Per-VC IP filter kludge' CONFIG_ATM_BR2684_IPFILTER
+ fi
+ fi
+fi
+tristate '802.1Q VLAN Support' CONFIG_VLAN_8021Q
+
+comment ' '
+tristate 'The IPX protocol' CONFIG_IPX
+if [ "$CONFIG_IPX" != "n" ]; then
+ source net/ipx/Config.in
+fi
+
+tristate 'Appletalk protocol support' CONFIG_ATALK
+if [ "$CONFIG_ATALK" != "n" ]; then
+ source drivers/net/appletalk/Config.in
+fi
+
+tristate 'DECnet Support' CONFIG_DECNET
+if [ "$CONFIG_DECNET" != "n" ]; then
+ source net/decnet/Config.in
+fi
+dep_tristate '802.1d Ethernet Bridging' CONFIG_BRIDGE $CONFIG_INET
+if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
+ tristate 'CCITT X.25 Packet Layer (EXPERIMENTAL)' CONFIG_X25
+ tristate 'LAPB Data Link Driver (EXPERIMENTAL)' CONFIG_LAPB
+ bool '802.2 LLC (EXPERIMENTAL)' CONFIG_LLC
+ bool 'Frame Diverter (EXPERIMENTAL)' CONFIG_NET_DIVERT
+# if [ "$CONFIG_LLC" = "y" ]; then
+# bool ' Netbeui (EXPERIMENTAL)' CONFIG_NETBEUI
+# fi
+ if [ "$CONFIG_INET" = "y" ]; then
+ tristate 'Acorn Econet/AUN protocols (EXPERIMENTAL)' CONFIG_ECONET
+ if [ "$CONFIG_ECONET" != "n" ]; then
+ bool ' AUN over UDP' CONFIG_ECONET_AUNUDP
+ bool ' Native Econet' CONFIG_ECONET_NATIVE
+ fi
+ fi
+ tristate 'WAN router' CONFIG_WAN_ROUTER
+ bool 'Fast switching (read help!)' CONFIG_NET_FASTROUTE
+ bool 'Forwarding between high speed interfaces' CONFIG_NET_HW_FLOWCONTROL
+fi
+
+mainmenu_option next_comment
+comment 'QoS and/or fair queueing'
+bool 'QoS and/or fair queueing' CONFIG_NET_SCHED
+if [ "$CONFIG_NET_SCHED" = "y" ]; then
+ source net/sched/Config.in
+fi
+#bool 'Network code profiler' CONFIG_NET_PROFILE
+endmenu
+
+mainmenu_option next_comment
+comment 'Network testing'
+dep_tristate 'Packet Generator (USE WITH CAUTION)' CONFIG_NET_PKTGEN $CONFIG_PROC_FS
+endmenu
+
+endmenu
diff -Nur linux-mips-cvs/net/Makefile linux-ebtables/net/Makefile
--- linux-mips-cvs/net/Makefile 2004-08-14 20:39:04.000000000 +0200
+++ linux-ebtables/net/Makefile 2005-02-07 05:52:50.000000000 +0100
@@ -7,7 +7,8 @@
O_TARGET := network.o
-mod-subdirs := ipv4/netfilter ipv6/netfilter ipx irda bluetooth atm netlink sched core sctp 802
+mod-subdirs := ipv4/netfilter ipv6/netfilter bridge/netfilter ipx irda \
+ bluetooth atm netlink sched core sctp 802
export-objs := netsyms.o
subdir-y := core ethernet
@@ -27,6 +28,12 @@
endif
endif
+ifneq ($(CONFIG_BRIDGE),n)
+ifneq ($(CONFIG_BRIDGE),)
+subdir-$(CONFIG_BRIDGE) += bridge/netfilter
+endif
+endif
+
subdir-$(CONFIG_KHTTPD) += khttpd
subdir-$(CONFIG_PACKET) += packet
subdir-$(CONFIG_NET_SCHED) += sched
diff -Nur linux-mips-cvs/net/bridge/Makefile linux-ebtables/net/bridge/Makefile
--- linux-mips-cvs/net/bridge/Makefile 2001-01-10 18:18:10.000000000 +0100
+++ linux-ebtables/net/bridge/Makefile 2005-02-07 05:52:50.000000000 +0100
@@ -7,10 +7,17 @@
#
# Note 2! The CFLAGS definition is now in the main makefile...
+export-objs := br.o
+
O_TARGET := bridge.o
obj-y := br.o br_device.o br_fdb.o br_forward.o br_if.o br_input.o \
br_ioctl.o br_notify.o br_stp.o br_stp_bpdu.o \
br_stp_if.o br_stp_timer.o
+
+ifeq ($(CONFIG_NETFILTER),y)
+obj-y += br_netfilter.o
+endif
+
obj-m := $(O_TARGET)
include $(TOPDIR)/Rules.make
diff -Nur linux-mips-cvs/net/bridge/br.c linux-ebtables/net/bridge/br.c
--- linux-mips-cvs/net/bridge/br.c 2004-08-14 20:39:04.000000000 +0200
+++ linux-ebtables/net/bridge/br.c 2005-02-07 05:52:50.000000000 +0100
@@ -30,6 +30,8 @@
#include "../atm/lec.h"
#endif
+int (*br_should_route_hook) (struct sk_buff **pskb) = NULL;
+
void br_dec_use_count()
{
MOD_DEC_USE_COUNT;
@@ -44,6 +46,10 @@
{
printk(KERN_INFO "NET4: Ethernet Bridge 008 for NET4.0\n");
+#ifdef CONFIG_NETFILTER
+ if (br_netfilter_init())
+ return 1;
+#endif
br_handle_frame_hook = br_handle_frame;
br_ioctl_hook = br_ioctl_deviceless_stub;
#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
@@ -57,6 +63,9 @@
static void __exit br_deinit(void)
{
+#ifdef CONFIG_NETFILTER
+ br_netfilter_fini();
+#endif
unregister_netdevice_notifier(&br_device_notifier);
rtnl_lock();
@@ -73,7 +82,7 @@
#endif
}
-EXPORT_NO_SYMBOLS;
+EXPORT_SYMBOL(br_should_route_hook);
module_init(br_init)
module_exit(br_deinit)
diff -Nur linux-mips-cvs/net/bridge/br_forward.c linux-ebtables/net/bridge/br_forward.c
--- linux-mips-cvs/net/bridge/br_forward.c 2003-11-17 02:07:47.000000000 +0100
+++ linux-ebtables/net/bridge/br_forward.c 2005-02-07 05:52:50.000000000 +0100
@@ -30,18 +30,21 @@
return 1;
}
-static int __dev_queue_push_xmit(struct sk_buff *skb)
+int br_dev_queue_push_xmit(struct sk_buff *skb)
{
+#ifdef CONFIG_NETFILTER
+ nf_bridge_maybe_copy_header(skb);
+#endif
skb_push(skb, ETH_HLEN);
dev_queue_xmit(skb);
return 0;
}
-static int __br_forward_finish(struct sk_buff *skb)
+int br_forward_finish(struct sk_buff *skb)
{
NF_HOOK(PF_BRIDGE, NF_BR_POST_ROUTING, skb, NULL, skb->dev,
- __dev_queue_push_xmit);
+ br_dev_queue_push_xmit);
return 0;
}
@@ -49,8 +52,11 @@
static void __br_deliver(struct net_bridge_port *to, struct sk_buff *skb)
{
skb->dev = to->dev;
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug = 0;
+#endif
NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
- __br_forward_finish);
+ br_forward_finish);
}
static void __br_forward(struct net_bridge_port *to, struct sk_buff *skb)
@@ -62,7 +68,7 @@
skb->ip_summed = CHECKSUM_NONE;
NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, indev, skb->dev,
- __br_forward_finish);
+ br_forward_finish);
}
/* called under bridge lock */
diff -Nur linux-mips-cvs/net/bridge/br_input.c linux-ebtables/net/bridge/br_input.c
--- linux-mips-cvs/net/bridge/br_input.c 2003-08-13 19:19:30.000000000 +0200
+++ linux-ebtables/net/bridge/br_input.c 2005-02-07 05:52:50.000000000 +0100
@@ -24,6 +24,9 @@
static int br_pass_frame_up_finish(struct sk_buff *skb)
{
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug = 0;
+#endif
netif_rx(skb);
return 0;
@@ -46,7 +49,7 @@
br_pass_frame_up_finish);
}
-static int br_handle_frame_finish(struct sk_buff *skb)
+int br_handle_frame_finish(struct sk_buff *skb)
{
struct net_bridge *br;
unsigned char *dest;
@@ -112,7 +115,7 @@
return 0;
}
-void br_handle_frame(struct sk_buff *skb)
+int br_handle_frame(struct sk_buff *skb)
{
struct net_bridge *br;
unsigned char *dest;
@@ -146,26 +149,35 @@
goto handle_special_frame;
if (p->state == BR_STATE_FORWARDING) {
+ if (br_should_route_hook && br_should_route_hook(&skb)) {
+ read_unlock(&br->lock);
+ return -1;
+ }
+
+ if (!memcmp(p->br->dev.dev_addr, dest, ETH_ALEN))
+ skb->pkt_type = PACKET_HOST;
+
NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
br_handle_frame_finish);
read_unlock(&br->lock);
- return;
+ return 0;
}
err:
read_unlock(&br->lock);
err_nolock:
kfree_skb(skb);
- return;
+ return 0;
handle_special_frame:
if (!dest[5]) {
NF_HOOK(PF_BRIDGE, NF_BR_LOCAL_IN, skb, skb->dev,NULL,
br_stp_handle_bpdu);
read_unlock(&br->lock);
- return;
+ return 0;
}
read_unlock(&br->lock);
kfree_skb(skb);
+ return 0;
}
diff -Nur linux-mips-cvs/net/bridge/br_netfilter.c linux-ebtables/net/bridge/br_netfilter.c
--- linux-mips-cvs/net/bridge/br_netfilter.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/br_netfilter.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,1103 @@
+/*
+ * Handle firewalling
+ * Linux ethernet bridge
+ *
+ * Authors:
+ * Lennert Buytenhek <buytenh@gnu.org>
+ * Bart De Schuymer (maintainer) <bdschuym@pandora.be>
+ *
+ * Changes:
+ * Apr 29 2003: physdev module support (bdschuym)
+ * Jun 19 2003: let arptables see bridged ARP traffic (bdschuym)
+ * Oct 06 2003: filter encapsulated IP/ARP VLAN traffic on untagged bridge
+ * (bdschuym)
+ * Aug 28 2004: add IPv6 filtering (bdschuym)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Lennert dedicates this file to Kerstin Wurdinger.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/in_route.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <asm/uaccess.h>
+#include <asm/checksum.h>
+#include "br_private.h"
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+
+#define skb_origaddr(skb) (((struct bridge_skb_cb *) \
+ (skb->nf_bridge->data))->daddr.ipv4)
+#define store_orig_dstaddr(skb) (skb_origaddr(skb) = (skb)->nh.iph->daddr)
+#define dnat_took_place(skb) (skb_origaddr(skb) != (skb)->nh.iph->daddr)
+
+#define has_bridge_parent(device) ((device)->br_port != NULL)
+#define bridge_parent(device) (&((device)->br_port->br->dev))
+
+#ifdef CONFIG_SYSCTL
+static struct ctl_table_header *brnf_sysctl_header;
+static int brnf_call_iptables = 1;
+static int brnf_call_ip6tables = 1;
+static int brnf_call_arptables = 1;
+static int brnf_filter_vlan_tagged = 1;
+#else
+#define brnf_filter_vlan_tagged 1
+#endif
+
+#define IS_VLAN_IP (skb->protocol == __constant_htons(ETH_P_8021Q) && \
+ hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_IP) && \
+ brnf_filter_vlan_tagged)
+#define IS_VLAN_IPV6 (skb->protocol == __constant_htons(ETH_P_8021Q) && \
+ hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_IPV6) && \
+ brnf_filter_vlan_tagged)
+/*
+#define IS_VLAN_ARP (skb->protocol == __constant_htons(ETH_P_8021Q) && \
+ hdr->h_vlan_encapsulated_proto == __constant_htons(ETH_P_ARP) && \
+ brnf_filter_vlan_tagged)
+*/
+
+/* We need these fake structures to make netfilter happy --
+ * lots of places assume that skb->dst != NULL, which isn't
+ * all that unreasonable.
+ *
+ * Currently, we fill in the PMTU entry because netfilter
+ * refragmentation needs it, and the rt_flags entry because
+ * ipt_REJECT needs it. Future netfilter modules might
+ * require us to fill additional fields.
+ */
+static struct net_device __fake_net_device = {
+ .hard_header_len = ETH_HLEN
+};
+
+static struct rtable __fake_rtable = {
+ u: {
+ dst: {
+ __refcnt: ATOMIC_INIT(1),
+ dev: &__fake_net_device,
+ pmtu: 1500
+ }
+ },
+
+ rt_flags: 0
+};
+
+
+/* PF_BRIDGE/PRE_ROUTING *********************************************/
+/* Undo the changes made for ip6tables PREROUTING and continue the
+ * bridge PRE_ROUTING hook. */
+static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
+{
+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_BR_PRE_ROUTING);
+#endif
+
+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ skb->pkt_type = PACKET_OTHERHOST;
+ nf_bridge->mask ^= BRNF_PKT_TYPE;
+ }
+ nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
+
+ skb->dst = (struct dst_entry *)&__fake_rtable;
+ dst_hold(skb->dst);
+
+ skb->dev = nf_bridge->physindev;
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_push(skb, VLAN_HLEN);
+ skb->nh.raw -= VLAN_HLEN;
+ }
+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
+ br_handle_frame_finish, 1);
+
+ return 0;
+}
+
+static void __br_dnat_complain(void)
+{
+ static unsigned long last_complaint;
+
+ if (jiffies - last_complaint >= 5 * HZ) {
+ printk(KERN_WARNING "Performing cross-bridge DNAT requires IP "
+ "forwarding to be enabled\n");
+ last_complaint = jiffies;
+ }
+}
+
+
+/* This requires some explaining. If DNAT has taken place,
+ * we will need to fix up the destination Ethernet address,
+ * and this is a tricky process.
+ *
+ * There are two cases to consider:
+ * 1. The packet was DNAT'ed to a device in the same bridge
+ * port group as it was received on. We can still bridge
+ * the packet.
+ * 2. The packet was DNAT'ed to a different device, either
+ * a non-bridged device or another bridge port group.
+ * The packet will need to be routed.
+ *
+ * The correct way of distinguishing between these two cases is to
+ * call ip_route_input() and to look at skb->dst->dev, which is
+ * changed to the destination device if ip_route_input() succeeds.
+ *
+ * Let us first consider the case that ip_route_input() succeeds:
+ *
+ * If skb->dst->dev equals the logical bridge device the packet
+ * came in on, we can consider this bridging. We then call
+ * skb->dst->output() which will make the packet enter br_nf_local_out()
+ * not much later. In that function it is assured that the iptables
+ * FORWARD chain is traversed for the packet.
+ *
+ * Otherwise, the packet is considered to be routed and we just
+ * change the destination MAC address so that the packet will
+ * later be passed up to the IP stack to be routed.
+ *
+ * Let us now consider the case that ip_route_input() fails:
+ *
+ * After a "echo '0' > /proc/sys/net/ipv4/ip_forward" ip_route_input()
+ * will fail, while __ip_route_output_key() will return success. The source
+ * address for __ip_route_output_key() is set to zero, so __ip_route_output_key
+ * thinks we're handling a locally generated packet and won't care
+ * if IP forwarding is allowed. We send a warning message to the users's
+ * log telling her to put IP forwarding on.
+ *
+ * ip_route_input() will also fail if there is no route available.
+ * In that case we just drop the packet.
+ *
+ * --Lennert, 20020411
+ * --Bart, 20020416 (updated)
+ * --Bart, 20021007 (updated)
+ */
+
+static int br_nf_pre_routing_finish_bridge(struct sk_buff *skb)
+{
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug |= (1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_FORWARD);
+#endif
+
+ if (skb->pkt_type == PACKET_OTHERHOST) {
+ skb->pkt_type = PACKET_HOST;
+ skb->nf_bridge->mask |= BRNF_PKT_TYPE;
+ }
+ skb->nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
+
+ skb->dev = bridge_parent(skb->dev);
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_pull(skb, VLAN_HLEN);
+ skb->nh.raw += VLAN_HLEN;
+ }
+ skb->dst->output(skb);
+ return 0;
+}
+
+static int br_nf_pre_routing_finish(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ struct iphdr *iph = skb->nh.iph;
+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_BR_PRE_ROUTING);
+#endif
+
+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ skb->pkt_type = PACKET_OTHERHOST;
+ nf_bridge->mask ^= BRNF_PKT_TYPE;
+ }
+ nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
+
+ if (dnat_took_place(skb)) {
+ if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
+ dev)) {
+ struct rtable *rt;
+
+ if (!ip_route_output(&rt, iph->daddr, 0, iph->tos, 0)) {
+ /* Bridged-and-DNAT'ed traffic doesn't
+ * require ip_forwarding.
+ */
+ if (((struct dst_entry *)rt)->dev == dev) {
+ skb->dst = (struct dst_entry *)rt;
+ goto bridged_dnat;
+ }
+ __br_dnat_complain();
+ dst_release((struct dst_entry *)rt);
+ }
+ kfree_skb(skb);
+ return 0;
+ } else {
+ if (skb->dst->dev == dev) {
+bridged_dnat:
+ /* Tell br_nf_local_out this is a
+ * bridged frame
+ */
+ nf_bridge->mask |= BRNF_BRIDGED_DNAT;
+ skb->dev = nf_bridge->physindev;
+ if (skb->protocol ==
+ __constant_htons(ETH_P_8021Q)) {
+ skb_push(skb, VLAN_HLEN);
+ skb->nh.raw -= VLAN_HLEN;
+ }
+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING,
+ skb, skb->dev, NULL,
+ br_nf_pre_routing_finish_bridge,
+ 1);
+ return 0;
+ }
+ memcpy(skb->mac.ethernet->h_dest, dev->dev_addr,
+ ETH_ALEN);
+ skb->pkt_type = PACKET_HOST;
+ }
+ } else {
+ skb->dst = (struct dst_entry *)&__fake_rtable;
+ dst_hold(skb->dst);
+ }
+
+ skb->dev = nf_bridge->physindev;
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_push(skb, VLAN_HLEN);
+ skb->nh.raw -= VLAN_HLEN;
+ }
+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
+ br_handle_frame_finish, 1);
+
+ return 0;
+}
+
+/* Some common code for IPv4/IPv6 */
+static void setup_pre_routing(struct sk_buff *skb)
+{
+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+
+ if (skb->pkt_type == PACKET_OTHERHOST) {
+ skb->pkt_type = PACKET_HOST;
+ nf_bridge->mask |= BRNF_PKT_TYPE;
+ }
+
+ nf_bridge->mask |= BRNF_NF_BRIDGE_PREROUTING;
+ nf_bridge->physindev = skb->dev;
+ skb->dev = bridge_parent(skb->dev);
+}
+
+/* We only check the length. A bridge shouldn't do any hop-by-hop stuff anyway */
+static int check_hbh_len(struct sk_buff *skb)
+{
+ unsigned char *raw = (u8*)(skb->nh.ipv6h+1);
+ u32 pkt_len;
+ int off = raw - skb->nh.raw;
+ int len = (raw[1]+1)<<3;
+
+ if ((raw + len) - skb->data > skb_headlen(skb))
+ goto bad;
+
+ off += 2;
+ len -= 2;
+
+ while (len > 0) {
+ int optlen = raw[off+1]+2;
+
+ switch (skb->nh.raw[off]) {
+ case IPV6_TLV_PAD0:
+ optlen = 1;
+ break;
+
+ case IPV6_TLV_PADN:
+ break;
+
+ case IPV6_TLV_JUMBO:
+ if (skb->nh.raw[off+1] != 4 || (off&3) != 2)
+ goto bad;
+
+ pkt_len = ntohl(*(u32*)(skb->nh.raw+off+2));
+
+ if (pkt_len > skb->len - sizeof(struct ipv6hdr))
+ goto bad;
+ if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
+ if (__pskb_trim(skb,
+ pkt_len + sizeof(struct ipv6hdr)))
+ goto bad;
+ if (skb->ip_summed == CHECKSUM_HW)
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+ break;
+ default:
+ if (optlen > len)
+ goto bad;
+ break;
+ }
+ off += optlen;
+ len -= optlen;
+ }
+ if (len == 0)
+ return 0;
+bad:
+ return -1;
+
+}
+
+/* Replicate the checks that IPv6 does on packet reception and pass the packet
+ * to ip6tables, which doesn't support NAT, so things are fairly simple. */
+static unsigned int br_nf_pre_routing_ipv6(unsigned int hook,
+ struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+ struct ipv6hdr *hdr;
+ u32 pkt_len;
+ struct nf_bridge_info *nf_bridge;
+
+ if (skb->len < sizeof(struct ipv6hdr))
+ goto inhdr_error;
+
+ if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+ goto inhdr_error;
+
+ hdr = skb->nh.ipv6h;
+
+ if (hdr->version != 6)
+ goto inhdr_error;
+
+ pkt_len = ntohs(hdr->payload_len);
+
+ if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
+ if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
+ goto inhdr_error;
+ if (pkt_len + sizeof(struct ipv6hdr) < skb->len) {
+ if (__pskb_trim(skb, pkt_len + sizeof(struct ipv6hdr)))
+ goto inhdr_error;
+ if (skb->ip_summed == CHECKSUM_HW)
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+ }
+ if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb))
+ goto inhdr_error;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_IP6_PRE_ROUTING);
+#endif
+ if ((nf_bridge = nf_bridge_alloc(skb)) == NULL)
+ return NF_DROP;
+ setup_pre_routing(skb);
+
+ NF_HOOK(PF_INET6, NF_IP6_PRE_ROUTING, skb, skb->dev, NULL,
+ br_nf_pre_routing_finish_ipv6);
+
+ return NF_STOLEN;
+
+inhdr_error:
+ return NF_DROP;
+}
+
+/* Direct IPv6 traffic to br_nf_pre_routing_ipv6.
+ * Replicate the checks that IPv4 does on packet reception.
+ * Set skb->dev to the bridge device (i.e. parent of the
+ * receiving device) to make netfilter happy, the REDIRECT
+ * target in particular. Save the original destination IP
+ * address to be able to detect DNAT afterwards.
+ */
+static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct iphdr *iph;
+ __u32 len;
+ struct sk_buff *skb = *pskb;
+ struct nf_bridge_info *nf_bridge;
+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)
+ ((*pskb)->mac.ethernet);
+
+ if (skb->protocol == __constant_htons(ETH_P_IPV6) || IS_VLAN_IPV6) {
+#ifdef CONFIG_SYSCTL
+ if (!brnf_call_ip6tables)
+ return NF_ACCEPT;
+#endif
+ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
+ goto out;
+
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_pull(skb, VLAN_HLEN);
+ (skb)->nh.raw += VLAN_HLEN;
+ }
+ return br_nf_pre_routing_ipv6(hook, skb, in, out, okfn);
+ }
+
+#ifdef CONFIG_SYSCTL
+ if (!brnf_call_iptables)
+ return NF_ACCEPT;
+#endif
+
+ if (skb->protocol != __constant_htons(ETH_P_IP) && !IS_VLAN_IP)
+ return NF_ACCEPT;
+ if ((skb = skb_share_check(*pskb, GFP_ATOMIC)) == NULL)
+ goto out;
+
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_pull(skb, VLAN_HLEN);
+ (skb)->nh.raw += VLAN_HLEN;
+ }
+
+ if (!pskb_may_pull(skb, sizeof(struct iphdr)))
+ goto inhdr_error;
+
+ iph = skb->nh.iph;
+ if (iph->ihl < 5 || iph->version != 4)
+ goto inhdr_error;
+
+ if (!pskb_may_pull(skb, 4*iph->ihl))
+ goto inhdr_error;
+
+ iph = skb->nh.iph;
+ if (ip_fast_csum((__u8 *)iph, iph->ihl) != 0)
+ goto inhdr_error;
+
+ len = ntohs(iph->tot_len);
+ if (skb->len < len || len < 4*iph->ihl)
+ goto inhdr_error;
+
+ if (skb->len > len) {
+ __pskb_trim(skb, len);
+ if (skb->ip_summed == CHECKSUM_HW)
+ skb->ip_summed = CHECKSUM_NONE;
+ }
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_IP_PRE_ROUTING);
+#endif
+ if ((nf_bridge = nf_bridge_alloc(skb)) == NULL)
+ return NF_DROP;
+
+ setup_pre_routing(skb);
+ store_orig_dstaddr(skb);
+
+ NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
+ br_nf_pre_routing_finish);
+
+ return NF_STOLEN;
+
+inhdr_error:
+// IP_INC_STATS_BH(IpInHdrErrors);
+out:
+ return NF_DROP;
+}
+
+
+/* PF_BRIDGE/LOCAL_IN ************************************************/
+/* The packet is locally destined, which requires a real
+ * dst_entry, so detach the fake one. On the way up, the
+ * packet would pass through PRE_ROUTING again (which already
+ * took place when the packet entered the bridge), but we
+ * register an IPv4 PRE_ROUTING 'sabotage' hook that will
+ * prevent this from happening.
+ */
+static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sk_buff *skb = *pskb;
+
+ if (skb->dst == (struct dst_entry *)&__fake_rtable) {
+ dst_release(skb->dst);
+ skb->dst = NULL;
+ }
+
+ return NF_ACCEPT;
+}
+
+/* PF_BRIDGE/FORWARD *************************************************/
+static int br_nf_forward_finish(struct sk_buff *skb)
+{
+ struct nf_bridge_info *nf_bridge = skb->nf_bridge;
+ struct net_device *in;
+/* struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet);*/
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_BR_FORWARD);
+#endif
+
+/* if (skb->protocol != __constant_htons(ETH_P_ARP) && !IS_VLAN_ARP) {*/
+ in = nf_bridge->physindev;
+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ skb->pkt_type = PACKET_OTHERHOST;
+ nf_bridge->mask ^= BRNF_PKT_TYPE;
+ }
+/* } else {
+ in = *((struct net_device **)(skb->cb));
+ }*/
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_push(skb, VLAN_HLEN);
+ skb->nh.raw -= VLAN_HLEN;
+ }
+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_FORWARD, skb, in,
+ skb->dev, br_forward_finish, 1);
+ return 0;
+}
+
+/* This is the 'purely bridged' case. For IP, we pass the packet to
+ * netfilter with indev and outdev set to the bridge device,
+ * but we are still able to filter on the 'real' indev/outdev
+ * because of the ipt_physdev.c module. For ARP, indev and outdev are the
+ * bridge ports.
+ */
+static unsigned int br_nf_forward_ip(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sk_buff *skb = *pskb;
+ struct nf_bridge_info *nf_bridge;
+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet);
+ int pf;
+
+ if (!skb->nf_bridge)
+ return NF_ACCEPT;
+
+ if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP)
+ pf = PF_INET;
+ else
+ pf = PF_INET6;
+
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_pull(*pskb, VLAN_HLEN);
+ (*pskb)->nh.raw += VLAN_HLEN;
+ }
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_BR_FORWARD);
+#endif
+ nf_bridge = skb->nf_bridge;
+ if (skb->pkt_type == PACKET_OTHERHOST) {
+ skb->pkt_type = PACKET_HOST;
+ nf_bridge->mask |= BRNF_PKT_TYPE;
+ }
+
+ /* The physdev module checks on this */
+ nf_bridge->mask |= BRNF_BRIDGED;
+ nf_bridge->physoutdev = skb->dev;
+
+ NF_HOOK(pf, NF_IP_FORWARD, skb, bridge_parent(in),
+ bridge_parent(out), br_nf_forward_finish);
+
+ return NF_STOLEN;
+}
+
+/*
+static unsigned int br_nf_forward_arp(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sk_buff *skb = *pskb;
+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet);
+ struct net_device **d = (struct net_device **)(skb->cb);
+
+ if (!brnf_call_arptables)
+ return NF_ACCEPT;
+
+ if (skb->protocol != __constant_htons(ETH_P_ARP)) {
+ if (!IS_VLAN_ARP)
+ return NF_ACCEPT;
+ skb_pull(*pskb, VLAN_HLEN);
+ (*pskb)->nh.raw += VLAN_HLEN;
+ }
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_BR_FORWARD);
+#endif
+
+ if (skb->nh.arph->ar_pln != 4) {
+ if (IS_VLAN_ARP) {
+ skb_push(*pskb, VLAN_HLEN);
+ (*pskb)->nh.raw -= VLAN_HLEN;
+ }
+ return NF_ACCEPT;
+ }
+ *d = (struct net_device *)in;
+ NF_HOOK(NF_ARP, NF_ARP_FORWARD, skb, (struct net_device *)in,
+ (struct net_device *)out, br_nf_forward_finish);
+
+ return NF_STOLEN;
+}
+*/
+
+/* PF_BRIDGE/LOCAL_OUT ***********************************************/
+static int br_nf_local_out_finish(struct sk_buff *skb)
+{
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug &= ~(1 << NF_BR_LOCAL_OUT);
+#endif
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_push(skb, VLAN_HLEN);
+ skb->nh.raw -= VLAN_HLEN;
+ }
+
+ NF_HOOK_THRESH(PF_BRIDGE, NF_BR_LOCAL_OUT, skb, NULL, skb->dev,
+ br_forward_finish, NF_BR_PRI_FIRST + 1);
+
+ return 0;
+}
+
+
+/* This function sees both locally originated IP packets and forwarded
+ * IP packets (in both cases the destination device is a bridge
+ * device). It also sees bridged-and-DNAT'ed packets.
+ * To be able to filter on the physical bridge devices (with the ipt_physdev.c
+ * module), we steal packets destined to a bridge device away from the
+ * PF_INET/FORWARD and PF_INET/OUTPUT hook functions, and give them back later,
+ * when we have determined the real output device. This is done in here.
+ *
+ * If (nf_bridge->mask & BRNF_BRIDGED_DNAT) then the packet is bridged
+ * and we fake the PF_BRIDGE/FORWARD hook. The function br_nf_forward()
+ * will then fake the PF_INET/FORWARD hook. br_nf_local_out() has priority
+ * NF_BR_PRI_FIRST, so no relevant PF_BRIDGE/INPUT functions have been nor
+ * will be executed.
+ * Otherwise, if nf_bridge->physindev is NULL, the bridge-nf code never touched
+ * this packet before, and so the packet was locally originated. We fake
+ * the PF_INET/LOCAL_OUT hook.
+ * Finally, if nf_bridge->physindev isn't NULL, then the packet was IP routed,
+ * so we fake the PF_INET/FORWARD hook. ipv4_sabotage_out() makes sure
+ * even routed packets that didn't arrive on a bridge interface have their
+ * nf_bridge->physindev set.
+ */
+
+static unsigned int br_nf_local_out(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct net_device *realindev, *realoutdev;
+ struct sk_buff *skb = *pskb;
+ struct nf_bridge_info *nf_bridge;
+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet);
+ int pf;
+
+ if (!skb->nf_bridge)
+ return NF_ACCEPT;
+
+ if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP)
+ pf = PF_INET;
+ else
+ pf = PF_INET6;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ /* Sometimes we get packets with NULL ->dst here (for example,
+ * running a dhcp client daemon triggers this). This should now
+ * be fixed, but let's keep the check around. */
+ if (skb->dst == NULL) {
+ printk(KERN_CRIT "br_netfilter: skb->dst == NULL.");
+ return NF_ACCEPT;
+ }
+#endif
+
+ nf_bridge = skb->nf_bridge;
+ nf_bridge->physoutdev = skb->dev;
+ realindev = nf_bridge->physindev;
+
+ /* Bridged, take PF_BRIDGE/FORWARD.
+ * (see big note in front of br_nf_pre_routing_finish)
+ */
+ if (nf_bridge->mask & BRNF_BRIDGED_DNAT) {
+ if (nf_bridge->mask & BRNF_PKT_TYPE) {
+ skb->pkt_type = PACKET_OTHERHOST;
+ nf_bridge->mask ^= BRNF_PKT_TYPE;
+ }
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_push(skb, VLAN_HLEN);
+ skb->nh.raw -= VLAN_HLEN;
+ }
+
+ NF_HOOK(PF_BRIDGE, NF_BR_FORWARD, skb, realindev,
+ skb->dev, br_forward_finish);
+ goto out;
+ }
+ realoutdev = bridge_parent(skb->dev);
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ /* iptables should match -o br0.x */
+ if (nf_bridge->netoutdev)
+ realoutdev = nf_bridge->netoutdev;
+#endif
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_pull(skb, VLAN_HLEN);
+ (*pskb)->nh.raw += VLAN_HLEN;
+ }
+ /* IP forwarded traffic has a physindev, locally
+ * generated traffic hasn't.
+ */
+ if (realindev != NULL) {
+ if (((nf_bridge->mask & BRNF_DONT_TAKE_PARENT) == 0) &&
+ has_bridge_parent(realindev))
+ realindev = bridge_parent(realindev);
+ NF_HOOK_THRESH(pf, NF_IP_FORWARD, skb, realindev,
+ realoutdev, okfn,
+ NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD + 1);
+ } else {
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb->nf_debug ^= (1 << NF_IP_LOCAL_OUT);
+#endif
+
+ NF_HOOK_THRESH(pf, NF_IP_LOCAL_OUT, skb, realindev,
+ realoutdev, okfn,
+ NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT + 1);
+ }
+
+out:
+ return NF_STOLEN;
+}
+
+
+/* PF_BRIDGE/POST_ROUTING ********************************************/
+static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sk_buff *skb = *pskb;
+ struct nf_bridge_info *nf_bridge = (*pskb)->nf_bridge;
+ struct vlan_ethhdr *hdr = (struct vlan_ethhdr *)(skb->mac.ethernet);
+ struct net_device *realoutdev = bridge_parent(skb->dev);
+ int pf;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ /* Be very paranoid. This probably won't happen anymore, but let's
+ * keep the check just to be sure... */
+ if (skb->mac.raw < skb->head || skb->mac.raw + ETH_HLEN > skb->data) {
+ printk(KERN_CRIT "br_netfilter: Argh!! br_nf_post_routing: "
+ "bad mac.raw pointer.");
+ goto print_error;
+ }
+#endif
+
+ if (!nf_bridge)
+ return NF_ACCEPT;
+
+ if (skb->protocol == __constant_htons(ETH_P_IP) || IS_VLAN_IP)
+ pf = PF_INET;
+ else
+ pf = PF_INET6;
+
+ /* Sometimes we get packets with NULL ->dst here (for example,
+ * running a dhcp client daemon triggers this).
+ */
+ if (skb->dst == NULL)
+ return NF_ACCEPT;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ /* Sometimes we get packets with NULL ->dst here (for example,
+ * running a dhcp client daemon triggers this). This should now
+ * be fixed, but let's keep the check around.
+ */
+ if (skb->dst == NULL) {
+ printk(KERN_CRIT "br_netfilter: skb->dst == NULL.");
+ goto print_error;
+ }
+
+ skb->nf_debug ^= (1 << NF_IP_POST_ROUTING);
+#endif
+
+ /* We assume any code from br_dev_queue_push_xmit onwards doesn't care
+ * about the value of skb->pkt_type.
+ */
+ if (skb->pkt_type == PACKET_OTHERHOST) {
+ skb->pkt_type = PACKET_HOST;
+ nf_bridge->mask |= BRNF_PKT_TYPE;
+ }
+
+ if (skb->protocol == __constant_htons(ETH_P_8021Q)) {
+ skb_pull(skb, VLAN_HLEN);
+ skb->nh.raw += VLAN_HLEN;
+ }
+
+ nf_bridge_save_header(skb);
+
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ if (nf_bridge->netoutdev)
+ realoutdev = nf_bridge->netoutdev;
+#endif
+ NF_HOOK(pf, NF_IP_POST_ROUTING, skb, NULL,
+ realoutdev, br_dev_queue_push_xmit);
+
+ return NF_STOLEN;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+print_error:
+ if (skb->dev != NULL) {
+ printk("[%s]", skb->dev->name);
+ if (has_bridge_parent(skb->dev))
+ printk("[%s]", bridge_parent(skb->dev)->name);
+ }
+ printk(" head:%p, raw:%p, data:%p\n", skb->head, skb->mac.raw,
+ skb->data);
+ return NF_ACCEPT;
+#endif
+}
+
+
+/* IPv4/SABOTAGE *****************************************************/
+
+/* Don't hand locally destined packets to PF_INET/PRE_ROUTING
+ * for the second time.
+ */
+static unsigned int ip_sabotage_in(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ if ((*pskb)->nf_bridge &&
+ !((*pskb)->nf_bridge->mask & BRNF_NF_BRIDGE_PREROUTING)) {
+ okfn(*pskb);
+ return NF_STOLEN;
+ }
+
+ return NF_ACCEPT;
+}
+
+/* Postpone execution of PF_INET/FORWARD, PF_INET/LOCAL_OUT
+ * and PF_INET/POST_ROUTING until we have done the forwarding
+ * decision in the bridge code and have determined skb->physoutdev.
+ */
+static unsigned int ip_sabotage_out(unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sk_buff *skb = *pskb;
+
+ if ((out->hard_start_xmit == br_dev_xmit &&
+ okfn != br_nf_forward_finish &&
+ okfn != br_nf_local_out_finish &&
+ okfn != br_dev_queue_push_xmit)
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ || ((out->priv_flags & IFF_802_1Q_VLAN) &&
+ VLAN_DEV_INFO(out)->real_dev->hard_start_xmit == br_dev_xmit)
+#endif
+ ) {
+ struct nf_bridge_info *nf_bridge;
+
+ if (!skb->nf_bridge) {
+#ifdef CONFIG_SYSCTL
+ /* This code is executed while in the IP(v6) stack,
+ the version should be 4 or 6. We can't use
+ skb->protocol because that isn't set on
+ PF_INET(6)/LOCAL_OUT. */
+ struct iphdr *ip = skb->nh.iph;
+
+ if (ip->version == 4 && !brnf_call_iptables)
+ return NF_ACCEPT;
+ else if (ip->version == 6 && !brnf_call_ip6tables)
+ return NF_ACCEPT;
+#endif
+ if (hook == NF_IP_POST_ROUTING)
+ return NF_ACCEPT;
+ if (!nf_bridge_alloc(skb))
+ return NF_DROP;
+ }
+
+ nf_bridge = skb->nf_bridge;
+
+ /* This frame will arrive on PF_BRIDGE/LOCAL_OUT and we
+ * will need the indev then. For a brouter, the real indev
+ * can be a bridge port, so we make sure br_nf_local_out()
+ * doesn't use the bridge parent of the indev by using
+ * the BRNF_DONT_TAKE_PARENT mask.
+ */
+ if (hook == NF_IP_FORWARD && nf_bridge->physindev == NULL) {
+ nf_bridge->mask &= BRNF_DONT_TAKE_PARENT;
+ nf_bridge->physindev = (struct net_device *)in;
+ }
+#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
+ /* the iptables outdev is br0.x, not br0 */
+ if (out->priv_flags & IFF_802_1Q_VLAN)
+ nf_bridge->netoutdev = (struct net_device *)out;
+#endif
+ okfn(skb);
+ return NF_STOLEN;
+ }
+
+ return NF_ACCEPT;
+}
+
+/* For br_nf_local_out we need (prio = NF_BR_PRI_FIRST), to insure that innocent
+ * PF_BRIDGE/NF_BR_LOCAL_OUT functions don't get bridged traffic as input.
+ * For br_nf_post_routing, we need (prio = NF_BR_PRI_LAST), because
+ * ip_refrag() can return NF_STOLEN.
+ */
+static struct nf_hook_ops br_nf_ops[] = {
+ { .hook = br_nf_pre_routing,
+ .pf = PF_BRIDGE,
+ .hooknum = NF_BR_PRE_ROUTING,
+ .priority = NF_BR_PRI_BRNF, },
+ { .hook = br_nf_local_in,
+ .pf = PF_BRIDGE,
+ .hooknum = NF_BR_LOCAL_IN,
+ .priority = NF_BR_PRI_BRNF, },
+ { .hook = br_nf_forward_ip,
+ .pf = PF_BRIDGE,
+ .hooknum = NF_BR_FORWARD,
+ .priority = NF_BR_PRI_BRNF /*- 1*/, },
+/* { .hook = br_nf_forward_arp,
+ .pf = PF_BRIDGE,
+ .hooknum = NF_BR_FORWARD,
+ .priority = NF_BR_PRI_BRNF, },*/
+ { .hook = br_nf_local_out,
+ .pf = PF_BRIDGE,
+ .hooknum = NF_BR_LOCAL_OUT,
+ .priority = NF_BR_PRI_FIRST, },
+ { .hook = br_nf_post_routing,
+ .pf = PF_BRIDGE,
+ .hooknum = NF_BR_POST_ROUTING,
+ .priority = NF_BR_PRI_LAST, },
+ { .hook = ip_sabotage_in,
+ .pf = PF_INET,
+ .hooknum = NF_IP_PRE_ROUTING,
+ .priority = NF_IP_PRI_FIRST, },
+ { .hook = ip_sabotage_in,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_PRE_ROUTING,
+ .priority = NF_IP6_PRI_FIRST, },
+ { .hook = ip_sabotage_out,
+ .pf = PF_INET,
+ .hooknum = NF_IP_FORWARD,
+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_FORWARD, },
+ { .hook = ip_sabotage_out,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_FORWARD,
+ .priority = NF_IP6_PRI_BRIDGE_SABOTAGE_FORWARD, },
+ { .hook = ip_sabotage_out,
+ .pf = PF_INET,
+ .hooknum = NF_IP_LOCAL_OUT,
+ .priority = NF_IP_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, },
+ { .hook = ip_sabotage_out,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_LOCAL_OUT,
+ .priority = NF_IP6_PRI_BRIDGE_SABOTAGE_LOCAL_OUT, },
+ { .hook = ip_sabotage_out,
+ .pf = PF_INET,
+ .hooknum = NF_IP_POST_ROUTING,
+ .priority = NF_IP_PRI_FIRST, },
+ { .hook = ip_sabotage_out,
+ .pf = PF_INET6,
+ .hooknum = NF_IP6_POST_ROUTING,
+ .priority = NF_IP6_PRI_FIRST, },
+};
+
+#ifdef CONFIG_SYSCTL
+static
+int brnf_sysctl_call_tables(ctl_table *ctl, int write, struct file * filp,
+ void *buffer, size_t *lenp)
+{
+ int ret;
+
+ ret = proc_dointvec(ctl, write, filp, buffer, lenp);
+
+ if (write && *(int *)(ctl->data))
+ *(int *)(ctl->data) = 1;
+ return ret;
+}
+
+static ctl_table brnf_table[] = {
+ {
+ .ctl_name = NET_BRIDGE_NF_CALL_ARPTABLES,
+ .procname = "bridge-nf-call-arptables",
+ .data = &brnf_call_arptables,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &brnf_sysctl_call_tables,
+ },
+ {
+ .ctl_name = NET_BRIDGE_NF_CALL_IPTABLES,
+ .procname = "bridge-nf-call-iptables",
+ .data = &brnf_call_iptables,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &brnf_sysctl_call_tables,
+ },
+ {
+ .ctl_name = NET_BRIDGE_NF_CALL_IP6TABLES,
+ .procname = "bridge-nf-call-ip6tables",
+ .data = &brnf_call_ip6tables,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &brnf_sysctl_call_tables,
+ },
+ {
+ .ctl_name = NET_BRIDGE_NF_FILTER_VLAN_TAGGED,
+ .procname = "bridge-nf-filter-vlan-tagged",
+ .data = &brnf_filter_vlan_tagged,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &brnf_sysctl_call_tables,
+ },
+ { .ctl_name = 0 }
+};
+
+static ctl_table brnf_bridge_table[] = {
+ {
+ .ctl_name = NET_BRIDGE,
+ .procname = "bridge",
+ .mode = 0555,
+ .child = brnf_table,
+ },
+ { .ctl_name = 0 }
+};
+
+static ctl_table brnf_net_table[] = {
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .mode = 0555,
+ .child = brnf_bridge_table,
+ },
+ { .ctl_name = 0 }
+};
+#endif
+
+int br_netfilter_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(br_nf_ops); i++) {
+ int ret;
+
+ if ((ret = nf_register_hook(&br_nf_ops[i])) >= 0)
+ continue;
+
+ while (i--)
+ nf_unregister_hook(&br_nf_ops[i]);
+
+ return ret;
+ }
+
+#ifdef CONFIG_SYSCTL
+ brnf_sysctl_header = register_sysctl_table(brnf_net_table, 0);
+ if (brnf_sysctl_header == NULL) {
+ printk(KERN_WARNING "br_netfilter: can't register to sysctl.\n");
+ for (i = 0; i < ARRAY_SIZE(br_nf_ops); i++)
+ nf_unregister_hook(&br_nf_ops[i]);
+ return -EFAULT;
+ }
+#endif
+
+ printk(KERN_NOTICE "Bridge firewalling registered\n");
+
+ return 0;
+}
+
+void br_netfilter_fini(void)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(br_nf_ops) - 1; i >= 0; i--)
+ nf_unregister_hook(&br_nf_ops[i]);
+#ifdef CONFIG_SYSCTL
+ unregister_sysctl_table(brnf_sysctl_header);
+#endif
+
+}
diff -Nur linux-mips-cvs/net/bridge/br_private.h linux-ebtables/net/bridge/br_private.h
--- linux-mips-cvs/net/bridge/br_private.h 2004-08-14 20:39:04.000000000 +0200
+++ linux-ebtables/net/bridge/br_private.h 2005-02-07 05:52:50.000000000 +0100
@@ -143,8 +143,10 @@
/* br_forward.c */
extern void br_deliver(struct net_bridge_port *to,
struct sk_buff *skb);
+extern int br_dev_queue_push_xmit(struct sk_buff *skb);
extern void br_forward(struct net_bridge_port *to,
struct sk_buff *skb);
+extern int br_forward_finish(struct sk_buff *skb);
extern void br_flood_deliver(struct net_bridge *br,
struct sk_buff *skb,
int clone);
@@ -165,7 +167,8 @@
int *ifindices);
/* br_input.c */
-extern void br_handle_frame(struct sk_buff *skb);
+extern int br_handle_frame_finish(struct sk_buff *skb);
+extern int br_handle_frame(struct sk_buff *skb);
/* br_ioctl.c */
extern int br_ioctl(struct net_bridge *br,
@@ -175,6 +178,10 @@
unsigned long arg2);
extern int br_ioctl_deviceless_stub(unsigned long arg);
+/* br_netfilter.c */
+extern int br_netfilter_init(void);
+extern void br_netfilter_fini(void);
+
/* br_stp.c */
extern int br_is_root_bridge(struct net_bridge *br);
extern struct net_bridge_port *br_get_port(struct net_bridge *br,
diff -Nur linux-mips-cvs/net/bridge/netfilter/Config.in linux-ebtables/net/bridge/netfilter/Config.in
--- linux-mips-cvs/net/bridge/netfilter/Config.in 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/Config.in 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,23 @@
+#
+# Bridge netfilter configuration
+#
+dep_tristate ' Bridge: ebtables' CONFIG_BRIDGE_NF_EBTABLES $CONFIG_BRIDGE
+dep_tristate ' ebt: filter table support' CONFIG_BRIDGE_EBT_T_FILTER $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: nat table support' CONFIG_BRIDGE_EBT_T_NAT $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: broute table support' CONFIG_BRIDGE_EBT_BROUTE $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: log support' CONFIG_BRIDGE_EBT_LOG $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: ulog support' CONFIG_BRIDGE_EBT_LOG $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: IP filter support' CONFIG_BRIDGE_EBT_IPF $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: ARP filter support' CONFIG_BRIDGE_EBT_ARPF $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: among filter support' CONFIG_BRIDGE_EBT_AMONG $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: limit filter support' CONFIG_BRIDGE_EBT_LIMIT $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: 802.1Q VLAN filter support' CONFIG_BRIDGE_EBT_VLANF $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: 802.3 filter support' CONFIG_BRIDGE_EBT_802_3 $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: packet type filter support' CONFIG_BRIDGE_EBT_PKTTYPE $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: STP filter support' CONFIG_BRIDGE_EBT_STP $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: mark filter support' CONFIG_BRIDGE_EBT_MARKF $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: arp reply target support' CONFIG_BRIDGE_EBT_ARPREPLY $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: snat target support' CONFIG_BRIDGE_EBT_SNAT $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: dnat target support' CONFIG_BRIDGE_EBT_DNAT $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: redirect target support' CONFIG_BRIDGE_EBT_REDIRECT $CONFIG_BRIDGE_NF_EBTABLES
+dep_tristate ' ebt: mark target support' CONFIG_BRIDGE_EBT_MARK_T $CONFIG_BRIDGE_NF_EBTABLES
diff -Nur linux-mips-cvs/net/bridge/netfilter/Makefile linux-ebtables/net/bridge/netfilter/Makefile
--- linux-mips-cvs/net/bridge/netfilter/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/Makefile 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,34 @@
+#
+# Makefile for the netfilter modules on top of bridging.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+# Note 2! The CFLAGS definition is now in the main makefile...
+
+O_TARGET := netfilter.o
+
+export-objs := ebtables.o
+
+obj-$(CONFIG_BRIDGE_NF_EBTABLES) += ebtables.o
+obj-$(CONFIG_BRIDGE_EBT_T_FILTER) += ebtable_filter.o
+obj-$(CONFIG_BRIDGE_EBT_T_NAT) += ebtable_nat.o
+obj-$(CONFIG_BRIDGE_EBT_BROUTE) += ebtable_broute.o
+obj-$(CONFIG_BRIDGE_EBT_802_3) += ebt_802_3.o
+obj-$(CONFIG_BRIDGE_EBT_ARPF) += ebt_arp.o
+obj-$(CONFIG_BRIDGE_EBT_AMONG) += ebt_among.o
+obj-$(CONFIG_BRIDGE_EBT_IPF) += ebt_ip.o
+obj-$(CONFIG_BRIDGE_EBT_LIMIT) += ebt_limit.o
+obj-$(CONFIG_BRIDGE_EBT_MARKF) += ebt_mark_m.o
+obj-$(CONFIG_BRIDGE_EBT_PKTTYPE) += ebt_pkttype.o
+obj-$(CONFIG_BRIDGE_EBT_STP) += ebt_stp.o
+obj-$(CONFIG_BRIDGE_EBT_VLANF) += ebt_vlan.o
+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o
+obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_ulog.o
+obj-$(CONFIG_BRIDGE_EBT_ARPREPLY) += ebt_arpreply.o
+obj-$(CONFIG_BRIDGE_EBT_DNAT) += ebt_dnat.o
+obj-$(CONFIG_BRIDGE_EBT_MARK_T) += ebt_mark.o
+obj-$(CONFIG_BRIDGE_EBT_REDIRECT) += ebt_redirect.o
+obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o
+include $(TOPDIR)/Rules.make
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_802_3.c linux-ebtables/net/bridge/netfilter/ebt_802_3.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_802_3.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_802_3.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,74 @@
+/*
+ * 802_3
+ *
+ * Author:
+ * Chris Vitale csv@bluetail.com
+ *
+ * May 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_802_3.h>
+#include <linux/module.h>
+
+static int ebt_filter_802_3(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *data, unsigned int datalen)
+{
+ struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
+ struct ebt_802_3_hdr *hdr = (struct ebt_802_3_hdr *)skb->mac.ethernet;
+ uint16_t type = hdr->llc.ui.ctrl & IS_UI ? hdr->llc.ui.type : hdr->llc.ni.type;
+
+ if (info->bitmask & EBT_802_3_SAP) {
+ if (FWINV(info->sap != hdr->llc.ui.ssap, EBT_802_3_SAP))
+ return EBT_NOMATCH;
+ if (FWINV(info->sap != hdr->llc.ui.dsap, EBT_802_3_SAP))
+ return EBT_NOMATCH;
+ }
+
+ if (info->bitmask & EBT_802_3_TYPE) {
+ if (!(hdr->llc.ui.dsap == CHECK_TYPE && hdr->llc.ui.ssap == CHECK_TYPE))
+ return EBT_NOMATCH;
+ if (FWINV(info->type != type, EBT_802_3_TYPE))
+ return EBT_NOMATCH;
+ }
+
+ return EBT_MATCH;
+}
+
+static struct ebt_match filter_802_3;
+static int ebt_802_3_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_802_3_info *info = (struct ebt_802_3_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_802_3_info)))
+ return -EINVAL;
+ if (info->bitmask & ~EBT_802_3_MASK || info->invflags & ~EBT_802_3_MASK)
+ return -EINVAL;
+
+ return 0;
+}
+
+static struct ebt_match filter_802_3 =
+{
+ .name = EBT_802_3_MATCH,
+ .match = ebt_filter_802_3,
+ .check = ebt_802_3_check,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_802_3);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_802_3);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_among.c linux-ebtables/net/bridge/netfilter/ebt_among.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_among.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_among.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,223 @@
+/*
+ * ebt_among
+ *
+ * Authors:
+ * Grzegorz Borowiak <grzes@gnu.univ.gda.pl>
+ *
+ * August, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_among.h>
+#include <linux/ip.h>
+#include <linux/if_arp.h>
+#include <linux/module.h>
+
+static int ebt_mac_wormhash_contains(const struct ebt_mac_wormhash *wh,
+ const char *mac, uint32_t ip)
+{
+ /* You may be puzzled as to how this code works.
+ * Some tricks were used, refer to
+ * include/linux/netfilter_bridge/ebt_among.h
+ * as there you can find a solution of this mystery.
+ */
+ const struct ebt_mac_wormhash_tuple *p;
+ int start, limit, i;
+ uint32_t cmp[2] = { 0, 0 };
+ int key = (const unsigned char) mac[5];
+
+ memcpy(((char *) cmp) + 2, mac, 6);
+ start = wh->table[key];
+ limit = wh->table[key + 1];
+ if (ip) {
+ for (i = start; i < limit; i++) {
+ p = &wh->pool[i];
+ if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0]) {
+ if (p->ip == 0 || p->ip == ip) {
+ return 1;
+ }
+ }
+ }
+ } else {
+ for (i = start; i < limit; i++) {
+ p = &wh->pool[i];
+ if (cmp[1] == p->cmp[1] && cmp[0] == p->cmp[0]) {
+ if (p->ip == 0) {
+ return 1;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+static int ebt_mac_wormhash_check_integrity(const struct ebt_mac_wormhash
+ *wh)
+{
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ if (wh->table[i] > wh->table[i + 1])
+ return -0x100 - i;
+ if (wh->table[i] < 0)
+ return -0x200 - i;
+ if (wh->table[i] > wh->poolsize)
+ return -0x300 - i;
+ }
+ if (wh->table[256] > wh->poolsize)
+ return -0xc00;
+ return 0;
+}
+
+static int get_ip_dst(const struct sk_buff *skb, uint32_t * addr)
+{
+ if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_IP))
+ *addr = skb->nh.iph->daddr;
+ else if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) {
+ uint32_t arp_len = sizeof(struct arphdr) +
+ (2 * (((*skb).nh.arph)->ar_hln)) +
+ (2 * (((*skb).nh.arph)->ar_pln));
+
+ /* Make sure the packet is long enough. */
+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail)
+ return -1;
+ /* IPv4 addresses are always 4 bytes. */
+ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t))
+ return -1;
+
+ memcpy(addr, ((*skb).nh.raw) + sizeof(struct arphdr) +
+ (2 * (((*skb).nh.arph)->ar_hln)) +
+ (((*skb).nh.arph)->ar_pln), sizeof(uint32_t));
+
+ }
+ return 0;
+}
+
+static int get_ip_src(const struct sk_buff *skb, uint32_t * addr)
+{
+ if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_IP))
+ *addr = skb->nh.iph->saddr;
+ else if (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) {
+ uint32_t arp_len = sizeof(struct arphdr) +
+ (2 * (((*skb).nh.arph)->ar_hln)) +
+ (2 * (((*skb).nh.arph)->ar_pln));
+
+ /* Make sure the packet is long enough. */
+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail)
+ return -1;
+ /* IPv4 addresses are always 4 bytes. */
+ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t))
+ return -1;
+
+ memcpy(addr, ((*skb).nh.raw) + sizeof(struct arphdr) +
+ ((((*skb).nh.arph)->ar_hln)), sizeof(uint32_t));
+
+ }
+ return 0;
+}
+
+static int ebt_filter_among(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out, const void *data,
+ unsigned int datalen)
+{
+ struct ebt_among_info *info = (struct ebt_among_info *) data;
+ const char *dmac, *smac;
+ const struct ebt_mac_wormhash *wh_dst, *wh_src;
+ uint32_t dip = 0, sip = 0;
+
+ wh_dst = ebt_among_wh_dst(info);
+ wh_src = ebt_among_wh_src(info);
+
+ if (wh_src) {
+ smac = skb->mac.ethernet->h_source;
+ if (get_ip_src(skb, &sip))
+ return EBT_NOMATCH;
+ if (!(info->bitmask & EBT_AMONG_SRC_NEG)) {
+ /* we match only if it contains */
+ if (!ebt_mac_wormhash_contains(wh_src, smac, sip))
+ return EBT_NOMATCH;
+ } else {
+ /* we match only if it DOES NOT contain */
+ if (ebt_mac_wormhash_contains(wh_src, smac, sip))
+ return EBT_NOMATCH;
+ }
+ }
+
+ if (wh_dst) {
+ dmac = skb->mac.ethernet->h_dest;
+ if (get_ip_dst(skb, &dip))
+ return EBT_NOMATCH;
+ if (!(info->bitmask & EBT_AMONG_DST_NEG)) {
+ /* we match only if it contains */
+ if (!ebt_mac_wormhash_contains(wh_dst, dmac, dip))
+ return EBT_NOMATCH;
+ } else {
+ /* we match only if it DOES NOT contain */
+ if (ebt_mac_wormhash_contains(wh_dst, dmac, dip))
+ return EBT_NOMATCH;
+ }
+ }
+
+ return EBT_MATCH;
+}
+
+static int ebt_among_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data,
+ unsigned int datalen)
+{
+ struct ebt_among_info *info = (struct ebt_among_info *) data;
+ int expected_length = sizeof(struct ebt_among_info);
+ const struct ebt_mac_wormhash *wh_dst, *wh_src;
+ int err;
+
+ wh_dst = ebt_among_wh_dst(info);
+ wh_src = ebt_among_wh_src(info);
+ expected_length += ebt_mac_wormhash_size(wh_dst);
+ expected_length += ebt_mac_wormhash_size(wh_src);
+
+ if (datalen != EBT_ALIGN(expected_length)) {
+ printk(KERN_WARNING
+ "ebtables: among: wrong size: %d"
+ "against expected %d, rounded to %d\n",
+ datalen, expected_length,
+ EBT_ALIGN(expected_length));
+ return -EINVAL;
+ }
+ if (wh_dst && (err = ebt_mac_wormhash_check_integrity(wh_dst))) {
+ printk(KERN_WARNING
+ "ebtables: among: dst integrity fail: %x\n", -err);
+ return -EINVAL;
+ }
+ if (wh_src && (err = ebt_mac_wormhash_check_integrity(wh_src))) {
+ printk(KERN_WARNING
+ "ebtables: among: src integrity fail: %x\n", -err);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static struct ebt_match filter_among = {
+ {NULL, NULL},
+ EBT_AMONG_MATCH,
+ ebt_filter_among,
+ ebt_among_check,
+ NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_among);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_among);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_arp.c linux-ebtables/net/bridge/netfilter/ebt_arp.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_arp.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_arp.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,149 @@
+/*
+ * ebt_arp
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ * Tim Gardner <timg@tpi.com>
+ *
+ * April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_arp.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/module.h>
+
+static int ebt_filter_arp(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *data, unsigned int datalen)
+{
+ struct ebt_arp_info *info = (struct ebt_arp_info *)data;
+
+ if (info->bitmask & EBT_ARP_OPCODE && FWINV(info->opcode !=
+ ((*skb).nh.arph)->ar_op, EBT_ARP_OPCODE))
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_ARP_HTYPE && FWINV(info->htype !=
+ ((*skb).nh.arph)->ar_hrd, EBT_ARP_HTYPE))
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_ARP_PTYPE && FWINV(info->ptype !=
+ ((*skb).nh.arph)->ar_pro, EBT_ARP_PTYPE))
+ return EBT_NOMATCH;
+
+ if (info->bitmask & (EBT_ARP_SRC_IP | EBT_ARP_DST_IP))
+ {
+ uint32_t arp_len = sizeof(struct arphdr) +
+ (2 * (((*skb).nh.arph)->ar_hln)) +
+ (2 * (((*skb).nh.arph)->ar_pln));
+ uint32_t dst;
+ uint32_t src;
+
+ // Make sure the packet is long enough.
+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail)
+ return EBT_NOMATCH;
+ // IPv4 addresses are always 4 bytes.
+ if (((*skb).nh.arph)->ar_pln != sizeof(uint32_t))
+ return EBT_NOMATCH;
+
+ if (info->bitmask & EBT_ARP_SRC_IP) {
+ memcpy(&src, ((*skb).nh.raw) + sizeof(struct arphdr) +
+ ((*skb).nh.arph)->ar_hln, sizeof(uint32_t));
+ if (FWINV(info->saddr != (src & info->smsk),
+ EBT_ARP_SRC_IP))
+ return EBT_NOMATCH;
+ }
+
+ if (info->bitmask & EBT_ARP_DST_IP) {
+ memcpy(&dst, ((*skb).nh.raw)+sizeof(struct arphdr) +
+ (2*(((*skb).nh.arph)->ar_hln)) +
+ (((*skb).nh.arph)->ar_pln), sizeof(uint32_t));
+ if (FWINV(info->daddr != (dst & info->dmsk),
+ EBT_ARP_DST_IP))
+ return EBT_NOMATCH;
+ }
+ }
+
+ if (info->bitmask & (EBT_ARP_SRC_MAC | EBT_ARP_DST_MAC))
+ {
+ uint32_t arp_len = sizeof(struct arphdr) +
+ (2 * (((*skb).nh.arph)->ar_hln)) +
+ (2 * (((*skb).nh.arph)->ar_pln));
+ unsigned char dst[ETH_ALEN];
+ unsigned char src[ETH_ALEN];
+
+ // Make sure the packet is long enough.
+ if ((((*skb).nh.raw) + arp_len) > (*skb).tail)
+ return EBT_NOMATCH;
+ // MAC addresses are 6 bytes.
+ if (((*skb).nh.arph)->ar_hln != ETH_ALEN)
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_ARP_SRC_MAC) {
+ uint8_t verdict, i;
+
+ memcpy(&src, ((*skb).nh.raw) +
+ sizeof(struct arphdr),
+ ETH_ALEN);
+ verdict = 0;
+ for (i = 0; i < 6; i++)
+ verdict |= (src[i] ^ info->smaddr[i]) &
+ info->smmsk[i];
+ if (FWINV(verdict != 0, EBT_ARP_SRC_MAC))
+ return EBT_NOMATCH;
+ }
+
+ if (info->bitmask & EBT_ARP_DST_MAC) {
+ uint8_t verdict, i;
+
+ memcpy(&dst, ((*skb).nh.raw) +
+ sizeof(struct arphdr) +
+ (((*skb).nh.arph)->ar_hln) +
+ (((*skb).nh.arph)->ar_pln),
+ ETH_ALEN);
+ verdict = 0;
+ for (i = 0; i < 6; i++)
+ verdict |= (dst[i] ^ info->dmaddr[i]) &
+ info->dmmsk[i];
+ if (FWINV(verdict != 0, EBT_ARP_DST_MAC))
+ return EBT_NOMATCH;
+ }
+ }
+
+ return EBT_MATCH;
+}
+
+static int ebt_arp_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_arp_info *info = (struct ebt_arp_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_arp_info)))
+ return -EINVAL;
+ if ((e->ethproto != __constant_htons(ETH_P_ARP) &&
+ e->ethproto != __constant_htons(ETH_P_RARP)) ||
+ e->invflags & EBT_IPROTO)
+ return -EINVAL;
+ if (info->bitmask & ~EBT_ARP_MASK || info->invflags & ~EBT_ARP_MASK)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_match filter_arp =
+{
+ {NULL, NULL}, EBT_ARP_MATCH, ebt_filter_arp, ebt_arp_check, NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_arp);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_arp);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_arpreply.c linux-ebtables/net/bridge/netfilter/ebt_arpreply.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_arpreply.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_arpreply.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,86 @@
+/*
+ * ebt_arpreply
+ *
+ * Authors:
+ * Grzegorz Borowiak <grzes@gnu.univ.gda.pl>
+ * Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * August, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_arpreply.h>
+#include <linux/if_arp.h>
+#include <net/arp.h>
+#include <linux/module.h>
+
+static int ebt_target_reply(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_arpreply_info *info = (struct ebt_arpreply_info *)data;
+ struct arphdr *ah;
+ unsigned char *sha, *arp_ptr;
+ u32 sip, tip;
+
+ ah = (**pskb).nh.arph;
+ if (ah->ar_op != __constant_htons(ARPOP_REQUEST) ||
+ ah->ar_hln != ETH_ALEN || ah->ar_pro != htons(ETH_P_IP) ||
+ ah->ar_pln != 4)
+ return EBT_CONTINUE;
+
+ arp_ptr = (unsigned char *)(ah + 1);
+
+ /* get source and target IP */
+ sha = arp_ptr;
+ arp_ptr += ETH_ALEN;
+ memcpy(&sip, arp_ptr, 4);
+ arp_ptr += 4 + ETH_ALEN;
+ memcpy(&tip, arp_ptr, 4);
+
+ arp_send(ARPOP_REPLY, ETH_P_ARP, sip, in, tip, sha, info->mac, sha);
+
+ return info->target;
+}
+
+static int ebt_target_reply_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_arpreply_info *info = (struct ebt_arpreply_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_arpreply_info)))
+ return -EINVAL;
+ if (BASE_CHAIN && info->target == EBT_RETURN)
+ return -EINVAL;
+ if (e->ethproto != __constant_htons(ETH_P_ARP) ||
+ e->invflags & EBT_IPROTO)
+ return -EINVAL;
+ CLEAR_BASE_CHAIN_BIT;
+ if (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING))
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_target reply_target =
+{
+ .name = EBT_ARPREPLY_TARGET,
+ .target = ebt_target_reply,
+ .check = ebt_target_reply_check,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ebt_register_target(&reply_target);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_target(&reply_target);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_dnat.c linux-ebtables/net/bridge/netfilter/ebt_dnat.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_dnat.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_dnat.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,65 @@
+/*
+ * ebt_dnat
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * June, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+#include <linux/module.h>
+#include <net/sock.h>
+
+static int ebt_target_dnat(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_nat_info *info = (struct ebt_nat_info *)data;
+
+ memcpy(((**pskb).mac.ethernet)->h_dest, info->mac,
+ ETH_ALEN * sizeof(unsigned char));
+ return info->target;
+}
+
+static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_nat_info *info = (struct ebt_nat_info *)data;
+
+ if (BASE_CHAIN && info->target == EBT_RETURN)
+ return -EINVAL;
+ CLEAR_BASE_CHAIN_BIT;
+ if ( (strcmp(tablename, "nat") ||
+ (hookmask & ~((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT)))) &&
+ (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
+ return -EINVAL;
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
+ return -EINVAL;
+ if (INVALID_TARGET)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_target dnat =
+{
+ {NULL, NULL}, EBT_DNAT_TARGET, ebt_target_dnat, ebt_target_dnat_check,
+ NULL, THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_target(&dnat);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_target(&dnat);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_ip.c linux-ebtables/net/bridge/netfilter/ebt_ip.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_ip.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_ip.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,121 @@
+/*
+ * ebt_ip
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ * Changes:
+ * added ip-sport and ip-dport
+ * Innominate Security Technologies AG <mhopf@innominate.com>
+ * September, 2002
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ip.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/module.h>
+
+struct tcpudphdr {
+ uint16_t src;
+ uint16_t dst;
+};
+
+union h_u {
+ unsigned char *raw;
+ struct tcpudphdr *tuh;
+};
+
+static int ebt_filter_ip(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *data,
+ unsigned int datalen)
+{
+ struct ebt_ip_info *info = (struct ebt_ip_info *)data;
+
+ if (info->bitmask & EBT_IP_TOS &&
+ FWINV(info->tos != ((*skb).nh.iph)->tos, EBT_IP_TOS))
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_IP_PROTO) {
+ if (FWINV(info->protocol != ((*skb).nh.iph)->protocol,
+ EBT_IP_PROTO))
+ return EBT_NOMATCH;
+ if ( info->protocol == IPPROTO_TCP ||
+ info->protocol == IPPROTO_UDP )
+ {
+ union h_u h;
+ h.raw = skb->data + skb->nh.iph->ihl*4;
+ if (info->bitmask & EBT_IP_DPORT) {
+ uint16_t port = ntohs(h.tuh->dst);
+ if (FWINV(port < info->dport[0] ||
+ port > info->dport[1],
+ EBT_IP_DPORT))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_IP_SPORT) {
+ uint16_t port = ntohs(h.tuh->src);
+ if (FWINV(port < info->sport[0] ||
+ port > info->sport[1],
+ EBT_IP_SPORT))
+ return EBT_NOMATCH;
+ }
+ }
+ }
+ if (info->bitmask & EBT_IP_SOURCE &&
+ FWINV((((*skb).nh.iph)->saddr & info->smsk) !=
+ info->saddr, EBT_IP_SOURCE))
+ return EBT_NOMATCH;
+ if ((info->bitmask & EBT_IP_DEST) &&
+ FWINV((((*skb).nh.iph)->daddr & info->dmsk) !=
+ info->daddr, EBT_IP_DEST))
+ return EBT_NOMATCH;
+ return EBT_MATCH;
+}
+
+static int ebt_ip_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_ip_info *info = (struct ebt_ip_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_ip_info)))
+ return -EINVAL;
+ if (e->ethproto != __constant_htons(ETH_P_IP) ||
+ e->invflags & EBT_IPROTO)
+ return -EINVAL;
+ if (info->bitmask & ~EBT_IP_MASK || info->invflags & ~EBT_IP_MASK)
+ return -EINVAL;
+ if (info->bitmask & (EBT_IP_DPORT | EBT_IP_SPORT)) {
+ if (!info->bitmask & EBT_IPROTO)
+ return -EINVAL;
+ if (info->protocol != IPPROTO_TCP &&
+ info->protocol != IPPROTO_UDP)
+ return -EINVAL;
+ }
+ if (info->bitmask & EBT_IP_DPORT && info->dport[0] > info->dport[1])
+ return -EINVAL;
+ if (info->bitmask & EBT_IP_SPORT && info->sport[0] > info->sport[1])
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_match filter_ip =
+{
+ {NULL, NULL}, EBT_IP_MATCH, ebt_filter_ip, ebt_ip_check, NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_ip);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_ip);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_limit.c linux-ebtables/net/bridge/netfilter/ebt_limit.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_limit.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_limit.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,101 @@
+/*
+ * ebt_limit
+ *
+ * Authors:
+ * Tom Marshall <tommy@home.tig-grr.com>
+ *
+ * Mostly copied from netfilter's ipt_limit.c, see that file for explanation
+ *
+ * September, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_limit.h>
+#include <linux/module.h>
+
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+
+static spinlock_t limit_lock = SPIN_LOCK_UNLOCKED;
+
+#define CREDITS_PER_JIFFY 128
+
+static int ebt_limit_match(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *data, unsigned int datalen)
+{
+ struct ebt_limit_info *info = (struct ebt_limit_info *)data;
+ unsigned long now = jiffies;
+
+ spin_lock_bh(&limit_lock);
+ info->credit += (now - xchg(&info->prev, now)) * CREDITS_PER_JIFFY;
+ if (info->credit > info->credit_cap)
+ info->credit = info->credit_cap;
+
+ if (info->credit >= info->cost) {
+ /* We're not limited. */
+ info->credit -= info->cost;
+ spin_unlock_bh(&limit_lock);
+ return EBT_MATCH;
+ }
+
+ spin_unlock_bh(&limit_lock);
+ return EBT_NOMATCH;
+}
+
+/* Precision saver. */
+static u_int32_t
+user2credits(u_int32_t user)
+{
+ /* If multiplying would overflow... */
+ if (user > 0xFFFFFFFF / (HZ*CREDITS_PER_JIFFY))
+ /* Divide first. */
+ return (user / EBT_LIMIT_SCALE) * HZ * CREDITS_PER_JIFFY;
+
+ return (user * HZ * CREDITS_PER_JIFFY) / EBT_LIMIT_SCALE;
+}
+
+static int ebt_limit_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_limit_info *info = (struct ebt_limit_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_limit_info)))
+ return -EINVAL;
+
+ /* Check for overflow. */
+ if (info->burst == 0
+ || user2credits(info->avg * info->burst) < user2credits(info->avg)) {
+ printk("Overflow in ebt_limit: %u/%u\n",
+ info->avg, info->burst);
+ return -EINVAL;
+ }
+
+ /* User avg in seconds * EBT_LIMIT_SCALE: convert to jiffies * 128. */
+ info->prev = jiffies;
+ info->credit = user2credits(info->avg * info->burst);
+ info->credit_cap = user2credits(info->avg * info->burst);
+ info->cost = user2credits(info->avg);
+ return 0;
+}
+
+static struct ebt_match ebt_limit_reg =
+{
+ {NULL, NULL}, EBT_LIMIT_MATCH, ebt_limit_match, ebt_limit_check, NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&ebt_limit_reg);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&ebt_limit_reg);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_log.c linux-ebtables/net/bridge/netfilter/ebt_log.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_log.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_log.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,153 @@
+/*
+ * ebt_log
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_log.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <linux/if_arp.h>
+#include <linux/spinlock.h>
+
+static spinlock_t ebt_log_lock = SPIN_LOCK_UNLOCKED;
+
+static int ebt_log_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_log_info *info = (struct ebt_log_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_log_info)))
+ return -EINVAL;
+ if (info->bitmask & ~EBT_LOG_MASK)
+ return -EINVAL;
+ if (info->loglevel >= 8)
+ return -EINVAL;
+ info->prefix[EBT_LOG_PREFIX_SIZE - 1] = '\0';
+ return 0;
+}
+
+struct tcpudphdr
+{
+ uint16_t src;
+ uint16_t dst;
+};
+
+struct arppayload
+{
+ unsigned char mac_src[ETH_ALEN];
+ unsigned char ip_src[4];
+ unsigned char mac_dst[ETH_ALEN];
+ unsigned char ip_dst[4];
+};
+
+static void print_MAC(unsigned char *p)
+{
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++, p++)
+ printk("%02x%c", *p, i == ETH_ALEN - 1 ? ' ':':');
+}
+
+#define myNIPQUAD(a) a[0], a[1], a[2], a[3]
+static void ebt_log(const struct sk_buff *skb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_log_info *info = (struct ebt_log_info *)data;
+ char level_string[4] = "< >";
+ level_string[1] = '0' + info->loglevel;
+
+ spin_lock_bh(&ebt_log_lock);
+ printk(level_string);
+ printk("%s IN=%s OUT=%s ", info->prefix, in ? in->name : "",
+ out ? out->name : "");
+
+ printk("MAC source = ");
+ print_MAC((skb->mac.ethernet)->h_source);
+ printk("MAC dest = ");
+ print_MAC((skb->mac.ethernet)->h_dest);
+
+ printk("proto = 0x%04x", ntohs(((*skb).mac.ethernet)->h_proto));
+
+ if ((info->bitmask & EBT_LOG_IP) && skb->mac.ethernet->h_proto ==
+ htons(ETH_P_IP)){
+ struct iphdr *iph = skb->nh.iph;
+ printk(" IP SRC=%u.%u.%u.%u IP DST=%u.%u.%u.%u,",
+ NIPQUAD(iph->saddr), NIPQUAD(iph->daddr));
+ printk(" IP tos=0x%02X, IP proto=%d", iph->tos, iph->protocol);
+ if (iph->protocol == IPPROTO_TCP ||
+ iph->protocol == IPPROTO_UDP) {
+ struct tcpudphdr *ports = (struct tcpudphdr *)(skb->data + iph->ihl*4);
+
+ if (skb->data + iph->ihl*4 > skb->tail) {
+ printk(" INCOMPLETE TCP/UDP header");
+ goto out;
+ }
+ printk(" SPT=%u DPT=%u", ntohs(ports->src),
+ ntohs(ports->dst));
+ }
+ goto out;
+ }
+
+ if ((info->bitmask & EBT_LOG_ARP) &&
+ ((skb->mac.ethernet->h_proto == __constant_htons(ETH_P_ARP)) ||
+ (skb->mac.ethernet->h_proto == __constant_htons(ETH_P_RARP)))) {
+ struct arphdr * arph = skb->nh.arph;
+ printk(" ARP HTYPE=%d, PTYPE=0x%04x, OPCODE=%d",
+ ntohs(arph->ar_hrd), ntohs(arph->ar_pro),
+ ntohs(arph->ar_op));
+ /* If it's for Ethernet and the lengths are OK,
+ * then log the ARP payload */
+ if (arph->ar_hrd == __constant_htons(1) &&
+ arph->ar_hln == ETH_ALEN &&
+ arph->ar_pln == sizeof(uint32_t)) {
+ struct arppayload *arpp = (struct arppayload *)(skb->data + sizeof(*arph));
+
+ if (skb->data + sizeof(*arph) > skb->tail) {
+ printk(" INCOMPLETE ARP header");
+ goto out;
+ }
+
+ printk(" ARP MAC SRC=");
+ print_MAC(arpp->mac_src);
+ printk(" ARP IP SRC=%u.%u.%u.%u",
+ myNIPQUAD(arpp->ip_src));
+ printk(" ARP MAC DST=");
+ print_MAC(arpp->mac_dst);
+ printk(" ARP IP DST=%u.%u.%u.%u",
+ myNIPQUAD(arpp->ip_dst));
+ }
+
+ }
+out:
+ printk("\n");
+ spin_unlock_bh(&ebt_log_lock);
+}
+
+static struct ebt_watcher log =
+{
+ {NULL, NULL}, EBT_LOG_WATCHER, ebt_log, ebt_log_check, NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_watcher(&log);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_watcher(&log);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_mark.c linux-ebtables/net/bridge/netfilter/ebt_mark.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_mark.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_mark.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,66 @@
+/*
+ * ebt_mark
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * July, 2002
+ *
+ */
+
+// The mark target can be used in any chain
+// I believe adding a mangle table just for marking is total overkill
+// Marking a frame doesn't really change anything in the frame anyway
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_t.h>
+#include <linux/module.h>
+
+static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
+
+ if ((*pskb)->nfmark != info->mark) {
+ (*pskb)->nfmark = info->mark;
+ (*pskb)->nfcache |= NFC_ALTERED;
+ }
+ return info->target;
+}
+
+static int ebt_target_mark_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_t_info)))
+ return -EINVAL;
+ if (BASE_CHAIN && info->target == EBT_RETURN)
+ return -EINVAL;
+ CLEAR_BASE_CHAIN_BIT;
+ if (INVALID_TARGET)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_target mark_target =
+{
+ {NULL, NULL}, EBT_MARK_TARGET, ebt_target_mark,
+ ebt_target_mark_check, NULL, THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_target(&mark_target);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_target(&mark_target);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_mark_m.c linux-ebtables/net/bridge/netfilter/ebt_mark_m.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_mark_m.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_mark_m.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,61 @@
+/*
+ * ebt_mark_m
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * July, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_mark_m.h>
+#include <linux/module.h>
+
+static int ebt_filter_mark(const struct sk_buff *skb,
+ const struct net_device *in, const struct net_device *out, const void *data,
+ unsigned int datalen)
+{
+ struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
+
+ if (info->bitmask & EBT_MARK_OR)
+ return !(!!(skb->nfmark & info->mask) ^ info->invert);
+ return !(((skb->nfmark & info->mask) == info->mark) ^ info->invert);
+}
+
+static int ebt_mark_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_mark_m_info *info = (struct ebt_mark_m_info *) data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_m_info)))
+ return -EINVAL;
+ if (info->bitmask & ~EBT_MARK_MASK)
+ return -EINVAL;
+ if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND))
+ return -EINVAL;
+ if (!info->bitmask)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_match filter_mark =
+{
+ {NULL, NULL}, EBT_MARK_MATCH, ebt_filter_mark, ebt_mark_check, NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_mark);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_mark);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_pkttype.c linux-ebtables/net/bridge/netfilter/ebt_pkttype.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_pkttype.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_pkttype.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,60 @@
+/*
+ * ebt_pkttype
+ *
+ * Authors:
+ * Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * April, 2003
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_pkttype.h>
+#include <linux/module.h>
+
+static int ebt_filter_pkttype(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *data,
+ unsigned int datalen)
+{
+ struct ebt_pkttype_info *info = (struct ebt_pkttype_info *)data;
+
+ return (skb->pkt_type != info->pkt_type) ^ info->invert;
+}
+
+static int ebt_pkttype_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_pkttype_info *info = (struct ebt_pkttype_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_pkttype_info)))
+ return -EINVAL;
+ if (info->invert != 0 && info->invert != 1)
+ return -EINVAL;
+ /* Allow any pkt_type value */
+ return 0;
+}
+
+static struct ebt_match filter_pkttype =
+{
+ .name = EBT_PKTTYPE_MATCH,
+ .match = ebt_filter_pkttype,
+ .check = ebt_pkttype_check,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_pkttype);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_pkttype);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_redirect.c linux-ebtables/net/bridge/netfilter/ebt_redirect.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_redirect.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_redirect.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,71 @@
+/*
+ * ebt_redirect
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_redirect.h>
+#include <linux/module.h>
+#include <net/sock.h>
+#include "../br_private.h"
+
+static int ebt_target_redirect(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;
+
+ if (hooknr != NF_BR_BROUTING)
+ memcpy((**pskb).mac.ethernet->h_dest,
+ in->br_port->br->dev.dev_addr, ETH_ALEN);
+ else {
+ memcpy((**pskb).mac.ethernet->h_dest,
+ in->dev_addr, ETH_ALEN);
+ (*pskb)->pkt_type = PACKET_HOST;
+ }
+ return info->target;
+}
+
+static int ebt_target_redirect_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_redirect_info)))
+ return -EINVAL;
+ if (BASE_CHAIN && info->target == EBT_RETURN)
+ return -EINVAL;
+ CLEAR_BASE_CHAIN_BIT;
+ if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) &&
+ (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
+ return -EINVAL;
+ if (INVALID_TARGET)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_target redirect_target =
+{
+ {NULL, NULL}, EBT_REDIRECT_TARGET, ebt_target_redirect,
+ ebt_target_redirect_check, NULL, THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_target(&redirect_target);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_target(&redirect_target);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_snat.c linux-ebtables/net/bridge/netfilter/ebt_snat.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_snat.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_snat.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,64 @@
+/*
+ * ebt_snat
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * June, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_nat.h>
+#include <linux/module.h>
+
+static int ebt_target_snat(struct sk_buff **pskb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_nat_info *info = (struct ebt_nat_info *) data;
+
+ memcpy(((**pskb).mac.ethernet)->h_source, info->mac,
+ ETH_ALEN * sizeof(unsigned char));
+ return info->target;
+}
+
+static int ebt_target_snat_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_nat_info *info = (struct ebt_nat_info *) data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
+ return -EINVAL;
+ if (BASE_CHAIN && info->target == EBT_RETURN)
+ return -EINVAL;
+ CLEAR_BASE_CHAIN_BIT;
+ if (strcmp(tablename, "nat"))
+ return -EINVAL;
+ if (hookmask & ~(1 << NF_BR_POST_ROUTING))
+ return -EINVAL;
+ if (INVALID_TARGET)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_target snat =
+{
+ {NULL, NULL}, EBT_SNAT_TARGET, ebt_target_snat, ebt_target_snat_check,
+ NULL, THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ebt_register_target(&snat);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_target(&snat);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_stp.c linux-ebtables/net/bridge/netfilter/ebt_stp.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_stp.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_stp.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,191 @@
+/*
+ * ebt_stp
+ *
+ * Authors:
+ * Bart De Schuymer <bdschuym@pandora.be>
+ * Stephen Hemminger <shemminger@osdl.org>
+ *
+ * June, 2003
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_stp.h>
+#include <linux/module.h>
+
+#define BPDU_TYPE_CONFIG 0
+#define BPDU_TYPE_TCN 0x80
+
+struct stp_header {
+ uint8_t dsap;
+ uint8_t ssap;
+ uint8_t ctrl;
+ uint8_t pid;
+ uint8_t vers;
+ uint8_t type;
+};
+
+struct stp_config_pdu {
+ uint8_t flags;
+ uint8_t root[8];
+ uint8_t root_cost[4];
+ uint8_t sender[8];
+ uint8_t port[2];
+ uint8_t msg_age[2];
+ uint8_t max_age[2];
+ uint8_t hello_time[2];
+ uint8_t forward_delay[2];
+};
+
+#define NR16(p) (p[0] << 8 | p[1])
+#define NR32(p) ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3])
+
+static int ebt_filter_config(struct ebt_stp_info *info,
+ struct stp_config_pdu *stpc)
+{
+ struct ebt_stp_config_info *c;
+ uint16_t v16;
+ uint32_t v32;
+ int verdict, i;
+
+ c = &info->config;
+ if ((info->bitmask & EBT_STP_FLAGS) &&
+ FWINV(c->flags != stpc->flags, EBT_STP_FLAGS))
+ return EBT_NOMATCH;
+ if (info->bitmask & EBT_STP_ROOTPRIO) {
+ v16 = NR16(stpc->root);
+ if (FWINV(v16 < c->root_priol ||
+ v16 > c->root_priou, EBT_STP_ROOTPRIO))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_ROOTADDR) {
+ verdict = 0;
+ for (i = 0; i < 6; i++)
+ verdict |= (stpc->root[2+i] ^ c->root_addr[i]) &
+ c->root_addrmsk[i];
+ if (FWINV(verdict != 0, EBT_STP_ROOTADDR))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_ROOTCOST) {
+ v32 = NR32(stpc->root_cost);
+ if (FWINV(v32 < c->root_costl ||
+ v32 > c->root_costu, EBT_STP_ROOTCOST))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_SENDERPRIO) {
+ v16 = NR16(stpc->sender);
+ if (FWINV(v16 < c->sender_priol ||
+ v16 > c->sender_priou, EBT_STP_SENDERPRIO))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_SENDERADDR) {
+ verdict = 0;
+ for (i = 0; i < 6; i++)
+ verdict |= (stpc->sender[2+i] ^ c->sender_addr[i]) &
+ c->sender_addrmsk[i];
+ if (FWINV(verdict != 0, EBT_STP_SENDERADDR))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_PORT) {
+ v16 = NR16(stpc->port);
+ if (FWINV(v16 < c->portl ||
+ v16 > c->portu, EBT_STP_PORT))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_MSGAGE) {
+ v16 = NR16(stpc->msg_age);
+ if (FWINV(v16 < c->msg_agel ||
+ v16 > c->msg_ageu, EBT_STP_MSGAGE))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_MAXAGE) {
+ v16 = NR16(stpc->max_age);
+ if (FWINV(v16 < c->max_agel ||
+ v16 > c->max_ageu, EBT_STP_MAXAGE))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_HELLOTIME) {
+ v16 = NR16(stpc->hello_time);
+ if (FWINV(v16 < c->hello_timel ||
+ v16 > c->hello_timeu, EBT_STP_HELLOTIME))
+ return EBT_NOMATCH;
+ }
+ if (info->bitmask & EBT_STP_FWDD) {
+ v16 = NR16(stpc->forward_delay);
+ if (FWINV(v16 < c->forward_delayl ||
+ v16 > c->forward_delayu, EBT_STP_FWDD))
+ return EBT_NOMATCH;
+ }
+ return EBT_MATCH;
+}
+
+static int ebt_filter_stp(const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out, const void *data, unsigned int datalen)
+{
+ struct ebt_stp_info *info = (struct ebt_stp_info *)data;
+ struct stp_header stph;
+ uint8_t header[6] = {0x42, 0x42, 0x03, 0x00, 0x00, 0x00};
+ if (skb_copy_bits(skb, 0, &stph, sizeof(stph)))
+ return EBT_NOMATCH;
+
+ /* The stp code only considers these */
+ if (memcmp(&stph, header, sizeof(header)))
+ return EBT_NOMATCH;
+
+ if (info->bitmask & EBT_STP_TYPE
+ && FWINV(info->type != stph.type, EBT_STP_TYPE))
+ return EBT_NOMATCH;
+
+ if (stph.type == BPDU_TYPE_CONFIG &&
+ info->bitmask & EBT_STP_CONFIG_MASK) {
+ struct stp_config_pdu stpc;
+
+ if (skb_copy_bits(skb, sizeof(stph), &stpc, sizeof(stpc)))
+ return EBT_NOMATCH;
+ return ebt_filter_config(info, &stpc);
+ }
+ return EBT_MATCH;
+}
+
+static int ebt_stp_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_stp_info *info = (struct ebt_stp_info *)data;
+ int len = EBT_ALIGN(sizeof(struct ebt_stp_info));
+ uint8_t bridge_ula[6] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
+ uint8_t msk[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+ if (info->bitmask & ~EBT_STP_MASK || info->invflags & ~EBT_STP_MASK ||
+ !(info->bitmask & EBT_STP_MASK))
+ return -EINVAL;
+ if (datalen != len)
+ return -EINVAL;
+ /* Make sure the match only receives stp frames */
+ if (memcmp(e->destmac, bridge_ula, ETH_ALEN) ||
+ memcmp(e->destmsk, msk, ETH_ALEN) || !(e->bitmask & EBT_DESTMAC))
+ return -EINVAL;
+
+ return 0;
+}
+
+static struct ebt_match filter_stp =
+{
+ .name = EBT_STP_MATCH,
+ .match = ebt_filter_stp,
+ .check = ebt_stp_check,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ebt_register_match(&filter_stp);
+}
+
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_stp);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_ulog.c linux-ebtables/net/bridge/netfilter/ebt_ulog.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_ulog.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_ulog.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,281 @@
+/*
+ * netfilter module for userspace bridged Ethernet frames logging daemons
+ *
+ * Authors:
+ * Bart De Schuymer <bdschuym@pandora.be>
+ *
+ * November, 2004
+ *
+ * Based on ipt_ULOG.c, which is
+ * (C) 2000-2002 by Harald Welte <laforge@netfilter.org>
+ *
+ * This module accepts two parameters:
+ *
+ * nlbufsiz:
+ * The parameter specifies how big the buffer for each netlink multicast
+ * group is. e.g. If you say nlbufsiz=8192, up to eight kb of packets will
+ * get accumulated in the kernel until they are sent to userspace. It is
+ * NOT possible to allocate more than 128kB, and it is strongly discouraged,
+ * because atomically allocating 128kB inside the network rx softirq is not
+ * reliable. Please also keep in mind that this buffer size is allocated for
+ * each nlgroup you are using, so the total kernel memory usage increases
+ * by that factor.
+ *
+ * flushtimeout:
+ * Specify, after how many hundredths of a second the queue should be
+ * flushed even if it is not full yet.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/spinlock.h>
+#include <linux/socket.h>
+#include <linux/skbuff.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/netlink.h>
+#include <linux/netdevice.h>
+#include <linux/module.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_ulog.h>
+#include <net/sock.h>
+#include "../br_private.h"
+
+#define PRINTR(format, args...) do { if (net_ratelimit()) \
+ printk(format , ## args); } while (0)
+
+static unsigned int nlbufsiz = 4096;
+MODULE_PARM(nlbufsiz, "i");
+MODULE_PARM_DESC(nlbufsiz, "netlink buffer size (number of bytes) "
+ "(defaults to 4096)");
+
+static unsigned int flushtimeout = 10;
+MODULE_PARM(flushtimeout, "i");
+MODULE_PARM_DESC(flushtimeout, "buffer flush timeout (hundredths of a second) "
+ "(defaults to 10)");
+
+typedef struct {
+ unsigned int qlen; /* number of nlmsgs' in the skb */
+ struct nlmsghdr *lastnlh; /* netlink header of last msg in skb */
+ struct sk_buff *skb; /* the pre-allocated skb */
+ struct timer_list timer; /* the timer function */
+ spinlock_t lock; /* the per-queue lock */
+} ebt_ulog_buff_t;
+
+static ebt_ulog_buff_t ulog_buffers[EBT_ULOG_MAXNLGROUPS];
+static struct sock *ebtlognl;
+
+/* send one ulog_buff_t to userspace */
+static void ulog_send(unsigned int nlgroup)
+{
+ ebt_ulog_buff_t *ub = &ulog_buffers[nlgroup];
+
+ if (timer_pending(&ub->timer))
+ del_timer(&ub->timer);
+
+ /* last nlmsg needs NLMSG_DONE */
+ if (ub->qlen > 1)
+ ub->lastnlh->nlmsg_type = NLMSG_DONE;
+
+ NETLINK_CB(ub->skb).dst_groups = 1 << nlgroup;
+ netlink_broadcast(ebtlognl, ub->skb, 0, 1 << nlgroup, GFP_ATOMIC);
+
+ ub->qlen = 0;
+ ub->skb = NULL;
+}
+
+/* timer function to flush queue in flushtimeout time */
+static void ulog_timer(unsigned long data)
+{
+ spin_lock_bh(&ulog_buffers[data].lock);
+ if (ulog_buffers[data].skb)
+ ulog_send(data);
+ spin_unlock_bh(&ulog_buffers[data].lock);
+}
+
+static struct sk_buff *ulog_alloc_skb(unsigned int size)
+{
+ struct sk_buff *skb;
+
+ skb = alloc_skb(nlbufsiz, GFP_ATOMIC);
+ if (!skb) {
+ PRINTR(KERN_ERR "ebt_ulog: can't alloc whole buffer "
+ "of size %ub!\n", nlbufsiz);
+ if (size < nlbufsiz) {
+ /* try to allocate only as much as we need for
+ * current packet */
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb)
+ PRINTR(KERN_ERR "ebt_ulog: can't even allocate "
+ "buffer of size %ub\n", size);
+ }
+ }
+
+ return skb;
+}
+
+static void ebt_ulog(const struct sk_buff *skb, unsigned int hooknr,
+ const struct net_device *in, const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ ebt_ulog_packet_msg_t *pm;
+ size_t size, copy_len;
+ struct nlmsghdr *nlh;
+ struct ebt_ulog_info *loginfo = (struct ebt_ulog_info *)data;
+ unsigned int group = loginfo->nlgroup;
+ ebt_ulog_buff_t *ub = &ulog_buffers[group];
+ spinlock_t *lock = &ub->lock;
+
+ if ((loginfo->cprange == 0) ||
+ (loginfo->cprange > skb->len + ETH_HLEN))
+ copy_len = skb->len + ETH_HLEN;
+ else
+ copy_len = loginfo->cprange;
+
+ size = NLMSG_SPACE(sizeof(*pm) + copy_len);
+
+ spin_lock_bh(lock);
+
+ if (!ub->skb) {
+ if (!(ub->skb = ulog_alloc_skb(size)))
+ goto alloc_failure;
+ } else if (size > skb_tailroom(ub->skb)) {
+ ulog_send(group);
+
+ if (!(ub->skb = ulog_alloc_skb(size)))
+ goto alloc_failure;
+ }
+
+ nlh = NLMSG_PUT(ub->skb, 0, ub->qlen, 0,
+ size - NLMSG_ALIGN(sizeof(*nlh)));
+ ub->qlen++;
+
+ pm = NLMSG_DATA(nlh);
+
+ /* Fill in the ulog data */
+ do_gettimeofday(&pm->stamp);
+ if (ub->qlen == 1)
+ ub->skb->stamp = pm->stamp;
+ pm->data_len = copy_len;
+ pm->mark = skb->nfmark;
+ pm->hook = hooknr;
+ if (loginfo->prefix != NULL)
+ strcpy(pm->prefix, loginfo->prefix);
+ else
+ *(pm->prefix) = '\0';
+
+ if (in) {
+ strcpy(pm->physindev, in->name);
+ strcpy(pm->indev, in->br_port->br->dev.name);
+ } else
+ pm->indev[0] = pm->physindev[0] = '\0';
+
+ if (out) {
+ strcpy(pm->physoutdev, out->name);
+ strcpy(pm->outdev, out->br_port->br->dev.name);
+ } else
+ pm->outdev[0] = pm->physoutdev[0] = '\0';
+
+ if (skb_copy_bits(skb, -ETH_HLEN, pm->data, copy_len) < 0)
+ BUG();
+
+ if (ub->qlen > 1)
+ ub->lastnlh->nlmsg_flags |= NLM_F_MULTI;
+
+ ub->lastnlh = nlh;
+
+ if (ub->qlen >= loginfo->qthreshold)
+ ulog_send(group);
+ else if (!timer_pending(&ub->timer)) {
+ ub->timer.expires = jiffies + flushtimeout * HZ / 100;
+ add_timer(&ub->timer);
+ }
+
+unlock:
+ spin_unlock_bh(lock);
+
+ return;
+
+nlmsg_failure:
+ PRINTR(KERN_ERR "ebt_ULOG: error during NLMSG_PUT.\n");
+ goto unlock;
+alloc_failure:
+ goto unlock;
+}
+
+static int ebt_ulog_check(const char *tablename, unsigned int hookmask,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_ulog_info *loginfo = (struct ebt_ulog_info *)data;
+
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_ulog_info)) ||
+ loginfo->nlgroup > 31)
+ return -EINVAL;
+
+ loginfo->prefix[EBT_ULOG_PREFIX_LEN - 1] = '\0';
+
+ if (loginfo->qthreshold > EBT_ULOG_MAX_QLEN)
+ loginfo->qthreshold = EBT_ULOG_MAX_QLEN;
+
+ return 0;
+}
+
+static struct ebt_watcher ulog = {
+ {NULL, NULL}, EBT_ULOG_WATCHER, ebt_ulog, ebt_ulog_check, NULL,
+ THIS_MODULE
+};
+
+static int __init init(void)
+{
+ int i, ret = 0;
+
+ if (nlbufsiz >= 128*1024) {
+ printk(KERN_NOTICE "ebt_ulog: Netlink buffer has to be <= 128kB,"
+ " please try a smaller nlbufsiz parameter.\n");
+ return -EINVAL;
+ }
+
+ /* initialize ulog_buffers */
+ for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) {
+ init_timer(&ulog_buffers[i].timer);
+ ulog_buffers[i].timer.function = ulog_timer;
+ ulog_buffers[i].timer.data = i;
+ ulog_buffers[i].lock = SPIN_LOCK_UNLOCKED;
+ }
+
+ ebtlognl = netlink_kernel_create(NETLINK_NFLOG, NULL);
+ if (!ebtlognl)
+ ret = -ENOMEM;
+ else if ((ret = ebt_register_watcher(&ulog)))
+ sock_release(ebtlognl->socket);
+
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ ebt_ulog_buff_t *ub;
+ int i;
+
+ ebt_unregister_watcher(&ulog);
+ for (i = 0; i < EBT_ULOG_MAXNLGROUPS; i++) {
+ ub = &ulog_buffers[i];
+ if (timer_pending(&ub->timer))
+ del_timer(&ub->timer);
+ spin_lock_bh(&ub->lock);
+ if (ub->skb) {
+ kfree_skb(ub->skb);
+ ub->skb = NULL;
+ }
+ spin_unlock_bh(&ub->lock);
+ }
+ sock_release(ebtlognl->socket);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Bart De Schuymer <bdschuym@pandora.be>");
+MODULE_DESCRIPTION("ebtables userspace logging module for bridged Ethernet"
+ " frames");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebt_vlan.c linux-ebtables/net/bridge/netfilter/ebt_vlan.c
--- linux-mips-cvs/net/bridge/netfilter/ebt_vlan.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebt_vlan.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,259 @@
+/*
+ * Description: EBTables 802.1Q match extension kernelspace module.
+ * Authors: Nick Fedchik <nick@fedchik.org.ua>
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/module.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/netfilter_bridge/ebt_vlan.h>
+
+static unsigned char debug;
+#define MODULE_VERSION "0.6"
+
+MODULE_PARM(debug, "0-1b");
+MODULE_PARM_DESC(debug, "debug=1 is turn on debug messages");
+MODULE_AUTHOR("Nick Fedchik <nick@fedchik.org.ua>");
+MODULE_DESCRIPTION("802.1Q match module (ebtables extension), v"
+ MODULE_VERSION);
+MODULE_LICENSE("GPL");
+
+
+#define DEBUG_MSG(args...) if (debug) printk (KERN_DEBUG "ebt_vlan: " args)
+#define INV_FLAG(_inv_flag_) (info->invflags & _inv_flag_) ? "!" : ""
+#define GET_BITMASK(_BIT_MASK_) info->bitmask & _BIT_MASK_
+#define SET_BITMASK(_BIT_MASK_) info->bitmask |= _BIT_MASK_
+#define EXIT_ON_MISMATCH(_MATCH_,_MASK_) if (!((info->_MATCH_ == _MATCH_)^!!(info->invflags & _MASK_))) return 1;
+
+/*
+ * Function description: ebt_filter_vlan() is main engine for
+ * checking passed 802.1Q frame according to
+ * the passed extension parameters (in the *data buffer)
+ * ebt_filter_vlan() is called after successfull check the rule params
+ * by ebt_check_vlan() function.
+ * Parameters:
+ * const struct sk_buff *skb - pointer to passed ethernet frame buffer
+ * const void *data - pointer to passed extension parameters
+ * unsigned int datalen - length of passed *data buffer
+ * const struct net_device *in -
+ * const struct net_device *out -
+ * const struct ebt_counter *c -
+ * Returned values:
+ * 0 - ok (all rule params matched)
+ * 1 - miss (rule params not acceptable to the parsed frame)
+ */
+static int
+ebt_filter_vlan(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *data, unsigned int datalen)
+{
+ struct ebt_vlan_info *info = (struct ebt_vlan_info *) data; /* userspace data */
+ struct vlan_ethhdr *frame = (struct vlan_ethhdr *) skb->mac.raw; /* Passed tagged frame */
+
+ unsigned short TCI; /* Whole TCI, given from parsed frame */
+ unsigned short id; /* VLAN ID, given from frame TCI */
+ unsigned char prio; /* user_priority, given from frame TCI */
+ unsigned short encap; /* VLAN encapsulated Type/Length field, given from orig frame */
+
+ /*
+ * Tag Control Information (TCI) consists of the following elements:
+ * - User_priority. The user_priority field is three bits in length,
+ * interpreted as a binary number.
+ * - Canonical Format Indicator (CFI). The Canonical Format Indicator
+ * (CFI) is a single bit flag value. Currently ignored.
+ * - VLAN Identifier (VID). The VID is encoded as
+ * an unsigned binary number.
+ */
+ TCI = ntohs(frame->h_vlan_TCI);
+ id = TCI & VLAN_VID_MASK;
+ prio = (TCI >> 13) & 0x7;
+ encap = frame->h_vlan_encapsulated_proto;
+
+ /*
+ * Checking VLAN Identifier (VID)
+ */
+ if (GET_BITMASK(EBT_VLAN_ID)) { /* Is VLAN ID parsed? */
+ EXIT_ON_MISMATCH(id, EBT_VLAN_ID);
+ }
+ /*
+ * Checking user_priority
+ */
+ if (GET_BITMASK(EBT_VLAN_PRIO)) { /* Is VLAN user_priority parsed? */
+ EXIT_ON_MISMATCH(prio, EBT_VLAN_PRIO);
+ }
+ /*
+ * Checking Encapsulated Proto (Length/Type) field
+ */
+ if (GET_BITMASK(EBT_VLAN_ENCAP)) { /* Is VLAN Encap parsed? */
+ EXIT_ON_MISMATCH(encap, EBT_VLAN_ENCAP);
+ }
+ /*
+ * All possible extension parameters was parsed.
+ * If rule never returned by missmatch, then all ok.
+ */
+ return 0;
+}
+
+/*
+ * Function description: ebt_vlan_check() is called when userspace
+ * delivers the table entry to the kernel,
+ * and to check that userspace doesn't give a bad table.
+ * Parameters:
+ * const char *tablename - table name string
+ * unsigned int hooknr - hook number
+ * const struct ebt_entry *e - ebtables entry basic set
+ * const void *data - pointer to passed extension parameters
+ * unsigned int datalen - length of passed *data buffer
+ * Returned values:
+ * 0 - ok (all delivered rule params are correct)
+ * 1 - miss (rule params is out of range, invalid, incompatible, etc.)
+ */
+static int
+ebt_check_vlan(const char *tablename,
+ unsigned int hooknr,
+ const struct ebt_entry *e, void *data, unsigned int datalen)
+{
+ struct ebt_vlan_info *info = (struct ebt_vlan_info *) data;
+
+ /*
+ * Parameters buffer overflow check
+ */
+ if (datalen != EBT_ALIGN(sizeof(struct ebt_vlan_info))) {
+ DEBUG_MSG
+ ("passed size %d is not eq to ebt_vlan_info (%d)\n",
+ datalen, sizeof(struct ebt_vlan_info));
+ return -EINVAL;
+ }
+
+ /*
+ * Is it 802.1Q frame checked?
+ */
+ if (e->ethproto != __constant_htons(ETH_P_8021Q)) {
+ DEBUG_MSG
+ ("passed entry proto %2.4X is not 802.1Q (8100)\n",
+ (unsigned short) ntohs(e->ethproto));
+ return -EINVAL;
+ }
+
+ /*
+ * Check for bitmask range
+ * True if even one bit is out of mask
+ */
+ if (info->bitmask & ~EBT_VLAN_MASK) {
+ DEBUG_MSG("bitmask %2X is out of mask (%2X)\n",
+ info->bitmask, EBT_VLAN_MASK);
+ return -EINVAL;
+ }
+
+ /*
+ * Check for inversion flags range
+ */
+ if (info->invflags & ~EBT_VLAN_MASK) {
+ DEBUG_MSG("inversion flags %2X is out of mask (%2X)\n",
+ info->invflags, EBT_VLAN_MASK);
+ return -EINVAL;
+ }
+
+ /*
+ * Reserved VLAN ID (VID) values
+ * -----------------------------
+ * 0 - The null VLAN ID.
+ * 1 - The default Port VID (PVID)
+ * 0x0FFF - Reserved for implementation use.
+ * if_vlan.h: VLAN_GROUP_ARRAY_LEN 4096.
+ */
+ if (GET_BITMASK(EBT_VLAN_ID)) { /* when vlan-id param was spec-ed */
+ if (!!info->id) { /* if id!=0 => check vid range */
+ if (info->id > VLAN_GROUP_ARRAY_LEN) {
+ DEBUG_MSG
+ ("id %d is out of range (1-4096)\n",
+ info->id);
+ return -EINVAL;
+ }
+ /*
+ * Note: This is valid VLAN-tagged frame point.
+ * Any value of user_priority are acceptable,
+ * but should be ignored according to 802.1Q Std.
+ * So we just drop the prio flag.
+ */
+ info->bitmask &= ~EBT_VLAN_PRIO;
+ }
+ /*
+ * Else, id=0 (null VLAN ID) => user_priority range (any?)
+ */
+ }
+
+ if (GET_BITMASK(EBT_VLAN_PRIO)) {
+ if ((unsigned char) info->prio > 7) {
+ DEBUG_MSG
+ ("prio %d is out of range (0-7)\n",
+ info->prio);
+ return -EINVAL;
+ }
+ }
+ /*
+ * Check for encapsulated proto range - it is possible to be
+ * any value for u_short range.
+ * if_ether.h: ETH_ZLEN 60 - Min. octets in frame sans FCS
+ */
+ if (GET_BITMASK(EBT_VLAN_ENCAP)) {
+ if ((unsigned short) ntohs(info->encap) < ETH_ZLEN) {
+ DEBUG_MSG
+ ("encap frame length %d is less than minimal\n",
+ ntohs(info->encap));
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static struct ebt_match filter_vlan = {
+ {NULL, NULL},
+ EBT_VLAN_MATCH,
+ ebt_filter_vlan,
+ ebt_check_vlan,
+ NULL,
+ THIS_MODULE
+};
+
+/*
+ * Module initialization function.
+ */
+static int __init init(void)
+{
+ DEBUG_MSG("ebtables 802.1Q extension module v"
+ MODULE_VERSION "\n");
+ DEBUG_MSG("module debug=%d\n", !!debug);
+ return ebt_register_match(&filter_vlan);
+}
+
+/*
+ * Module "finalization" function
+ */
+static void __exit fini(void)
+{
+ ebt_unregister_match(&filter_vlan);
+}
+
+module_init(init);
+module_exit(fini);
+
+EXPORT_NO_SYMBOLS;
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebtable_broute.c linux-ebtables/net/bridge/netfilter/ebtable_broute.c
--- linux-mips-cvs/net/bridge/netfilter/ebtable_broute.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebtable_broute.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,79 @@
+/*
+ * ebtable_broute
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ * This table lets you choose between routing and bridging for frames
+ * entering on a bridge enslaved nic. This table is traversed before any
+ * other ebtables table. See net/bridge/br_input.c.
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+#include <linux/if_bridge.h>
+#include <linux/brlock.h>
+
+// EBT_ACCEPT means the frame will be bridged
+// EBT_DROP means the frame will be routed
+static struct ebt_entries initial_chain =
+ {0, "BROUTING", 0, EBT_ACCEPT, 0};
+
+static struct ebt_replace initial_table =
+{
+ "broute", 1 << NF_BR_BROUTING, 0, sizeof(struct ebt_entries),
+ { [NF_BR_BROUTING]&initial_chain}, 0, NULL, (char *)&initial_chain
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+ if (valid_hooks & ~(1 << NF_BR_BROUTING))
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_table broute_table =
+{
+ {NULL, NULL}, "broute", &initial_table, 1 << NF_BR_BROUTING,
+ RW_LOCK_UNLOCKED, check, NULL
+};
+
+static int ebt_broute(struct sk_buff **pskb)
+{
+ int ret;
+
+ ret = ebt_do_table(NF_BR_BROUTING, pskb, (*pskb)->dev, NULL,
+ &broute_table);
+ if (ret == NF_DROP)
+ return 1; // route it
+ return 0; // bridge it
+}
+
+static int __init init(void)
+{
+ int ret;
+
+ ret = ebt_register_table(&broute_table);
+ if (ret < 0)
+ return ret;
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+ // see br_input.c
+ br_should_route_hook = ebt_broute;
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ br_write_lock_bh(BR_NETPROTO_LOCK);
+ br_should_route_hook = NULL;
+ br_write_unlock_bh(BR_NETPROTO_LOCK);
+ ebt_unregister_table(&broute_table);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebtable_filter.c linux-ebtables/net/bridge/netfilter/ebtable_filter.c
--- linux-mips-cvs/net/bridge/netfilter/ebtable_filter.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebtable_filter.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,90 @@
+/*
+ * ebtable_filter
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+
+#define FILTER_VALID_HOOKS ((1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | \
+ (1 << NF_BR_LOCAL_OUT))
+
+static struct ebt_entries initial_chains[] =
+{
+ {0, "INPUT", 0, EBT_ACCEPT, 0},
+ {0, "FORWARD", 0, EBT_ACCEPT, 0},
+ {0, "OUTPUT", 0, EBT_ACCEPT, 0}
+};
+
+static struct ebt_replace initial_table =
+{
+ "filter", FILTER_VALID_HOOKS, 0, 3 * sizeof(struct ebt_entries),
+ { [NF_BR_LOCAL_IN]&initial_chains[0], [NF_BR_FORWARD]&initial_chains[1],
+ [NF_BR_LOCAL_OUT]&initial_chains[2] }, 0, NULL, (char *)initial_chains
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+ if (valid_hooks & ~FILTER_VALID_HOOKS)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_table frame_filter =
+{
+ {NULL, NULL}, "filter", &initial_table, FILTER_VALID_HOOKS,
+ RW_LOCK_UNLOCKED, check, NULL
+};
+
+static unsigned int
+ebt_hook (unsigned int hook, struct sk_buff **pskb, const struct net_device *in,
+ const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+ return ebt_do_table(hook, pskb, in, out, &frame_filter);
+}
+
+static struct nf_hook_ops ebt_ops_filter[] = {
+ { { NULL, NULL }, ebt_hook, PF_BRIDGE, NF_BR_LOCAL_IN,
+ NF_BR_PRI_FILTER_BRIDGED},
+ { { NULL, NULL }, ebt_hook, PF_BRIDGE, NF_BR_FORWARD,
+ NF_BR_PRI_FILTER_BRIDGED},
+ { { NULL, NULL }, ebt_hook, PF_BRIDGE, NF_BR_LOCAL_OUT,
+ NF_BR_PRI_FILTER_OTHER}
+};
+
+static int __init init(void)
+{
+ int i, j, ret;
+
+ ret = ebt_register_table(&frame_filter);
+ if (ret < 0)
+ return ret;
+ for (i = 0; i < sizeof(ebt_ops_filter) / sizeof(ebt_ops_filter[0]); i++)
+ if ((ret = nf_register_hook(&ebt_ops_filter[i])) < 0)
+ goto cleanup;
+ return ret;
+cleanup:
+ for (j = 0; j < i; j++)
+ nf_unregister_hook(&ebt_ops_filter[j]);
+ ebt_unregister_table(&frame_filter);
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ int i;
+
+ for (i = 0; i < sizeof(ebt_ops_filter) / sizeof(ebt_ops_filter[0]); i++)
+ nf_unregister_hook(&ebt_ops_filter[i]);
+ ebt_unregister_table(&frame_filter);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebtable_nat.c linux-ebtables/net/bridge/netfilter/ebtable_nat.c
--- linux-mips-cvs/net/bridge/netfilter/ebtable_nat.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebtable_nat.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,96 @@
+/*
+ * ebtable_nat
+ *
+ * Authors:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * April, 2002
+ *
+ */
+
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/module.h>
+#define NAT_VALID_HOOKS ((1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_OUT) | \
+ (1 << NF_BR_POST_ROUTING))
+
+static struct ebt_entries initial_chains[] =
+{
+ {0, "PREROUTING", 0, EBT_ACCEPT, 0},
+ {0, "OUTPUT", 0, EBT_ACCEPT, 0},
+ {0, "POSTROUTING", 0, EBT_ACCEPT, 0}
+};
+
+static struct ebt_replace initial_table =
+{
+ "nat", NAT_VALID_HOOKS, 0, 3 * sizeof(struct ebt_entries),
+ { [NF_BR_PRE_ROUTING]&initial_chains[0], [NF_BR_LOCAL_OUT]&initial_chains[1],
+ [NF_BR_POST_ROUTING]&initial_chains[2] }, 0, NULL, (char *)initial_chains
+};
+
+static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
+{
+ if (valid_hooks & ~NAT_VALID_HOOKS)
+ return -EINVAL;
+ return 0;
+}
+
+static struct ebt_table frame_nat =
+{
+ {NULL, NULL}, "nat", &initial_table, NAT_VALID_HOOKS,
+ RW_LOCK_UNLOCKED, check, NULL
+};
+
+static unsigned int
+ebt_nat_dst(unsigned int hook, struct sk_buff **pskb, const struct net_device *in
+ , const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+ return ebt_do_table(hook, pskb, in, out, &frame_nat);
+}
+
+static unsigned int
+ebt_nat_src(unsigned int hook, struct sk_buff **pskb, const struct net_device *in
+ , const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+ return ebt_do_table(hook, pskb, in, out, &frame_nat);
+}
+
+static struct nf_hook_ops ebt_ops_nat[] = {
+ { { NULL, NULL }, ebt_nat_dst, PF_BRIDGE, NF_BR_LOCAL_OUT,
+ NF_BR_PRI_NAT_DST_OTHER},
+ { { NULL, NULL }, ebt_nat_src, PF_BRIDGE, NF_BR_POST_ROUTING,
+ NF_BR_PRI_NAT_SRC},
+ { { NULL, NULL }, ebt_nat_dst, PF_BRIDGE, NF_BR_PRE_ROUTING,
+ NF_BR_PRI_NAT_DST_BRIDGED},
+};
+
+static int __init init(void)
+{
+ int i, ret, j;
+
+ ret = ebt_register_table(&frame_nat);
+ if (ret < 0)
+ return ret;
+ for (i = 0; i < sizeof(ebt_ops_nat) / sizeof(ebt_ops_nat[0]); i++)
+ if ((ret = nf_register_hook(&ebt_ops_nat[i])) < 0)
+ goto cleanup;
+ return ret;
+cleanup:
+ for (j = 0; j < i; j++)
+ nf_unregister_hook(&ebt_ops_nat[j]);
+ ebt_unregister_table(&frame_nat);
+ return ret;
+}
+
+static void __exit fini(void)
+{
+ int i;
+
+ for (i = 0; i < sizeof(ebt_ops_nat) / sizeof(ebt_ops_nat[0]); i++)
+ nf_unregister_hook(&ebt_ops_nat[i]);
+ ebt_unregister_table(&frame_nat);
+}
+
+module_init(init);
+module_exit(fini);
+EXPORT_NO_SYMBOLS;
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/bridge/netfilter/ebtables.c linux-ebtables/net/bridge/netfilter/ebtables.c
--- linux-mips-cvs/net/bridge/netfilter/ebtables.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/bridge/netfilter/ebtables.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,1496 @@
+/*
+ * ebtables
+ *
+ * Author:
+ * Bart De Schuymer <bart.de.schuymer@pandora.be>
+ *
+ * ebtables.c,v 2.0, July, 2002
+ *
+ * This code is stongly inspired on the iptables code which is
+ * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+// used for print_string
+#include <linux/sched.h>
+#include <linux/tty.h>
+
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/netfilter_bridge/ebtables.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+#include <linux/smp.h>
+#include <net/sock.h>
+// needed for logical [in,out]-dev filtering
+#include "../br_private.h"
+
+// list_named_find
+#define ASSERT_READ_LOCK(x)
+#define ASSERT_WRITE_LOCK(x)
+#include <linux/netfilter_ipv4/listhelp.h>
+
+#if 0 // use this for remote debugging
+// Copyright (C) 1998 by Ori Pomerantz
+// Print the string to the appropriate tty, the one
+// the current task uses
+static void print_string(char *str)
+{
+ struct tty_struct *my_tty;
+
+ /* The tty for the current task */
+ my_tty = current->tty;
+ if (my_tty != NULL) {
+ (*(my_tty->driver).write)(my_tty, 0, str, strlen(str));
+ (*(my_tty->driver).write)(my_tty, 0, "\015\012", 2);
+ }
+}
+
+#define BUGPRINT(args) print_string(args);
+#else
+#define BUGPRINT(format, args...) printk("kernel msg: ebtables bug: please "\
+ "report to author: "format, ## args)
+// #define BUGPRINT(format, args...)
+#endif
+#define MEMPRINT(format, args...) printk("kernel msg: ebtables "\
+ ": out of memory: "format, ## args)
+// #define MEMPRINT(format, args...)
+
+
+
+// Each cpu has its own set of counters, so there is no need for write_lock in
+// the softirq
+// For reading or updating the counters, the user context needs to
+// get a write_lock
+
+// The size of each set of counters is altered to get cache alignment
+#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
+#define COUNTER_OFFSET(n) (SMP_ALIGN(n * sizeof(struct ebt_counter)))
+#define COUNTER_BASE(c, n, cpu) ((struct ebt_counter *)(((char *)c) + \
+ COUNTER_OFFSET(n) * cpu))
+
+
+
+static DECLARE_MUTEX(ebt_mutex);
+static LIST_HEAD(ebt_tables);
+static LIST_HEAD(ebt_targets);
+static LIST_HEAD(ebt_matches);
+static LIST_HEAD(ebt_watchers);
+
+static struct ebt_target ebt_standard_target =
+{ {NULL, NULL}, EBT_STANDARD_TARGET, NULL, NULL, NULL, NULL};
+
+static inline int ebt_do_watcher (struct ebt_entry_watcher *w,
+ const struct sk_buff *skb, unsigned int hooknr, const struct net_device *in,
+ const struct net_device *out)
+{
+ w->u.watcher->watcher(skb, hooknr, in, out, w->data,
+ w->watcher_size);
+ // watchers don't give a verdict
+ return 0;
+}
+
+static inline int ebt_do_match (struct ebt_entry_match *m,
+ const struct sk_buff *skb, const struct net_device *in,
+ const struct net_device *out)
+{
+ return m->u.match->match(skb, in, out, m->data,
+ m->match_size);
+}
+
+static inline int ebt_dev_check(char *entry, const struct net_device *device)
+{
+ int i = 0;
+ char *devname = device->name;
+
+ if (*entry == '\0')
+ return 0;
+ if (!device)
+ return 1;
+ /* 1 is the wildcard token */
+ while (entry[i] != '\0' && entry[i] != 1 && entry[i] == devname[i])
+ i++;
+ return (devname[i] != entry[i] && entry[i] != 1);
+}
+
+#define FWINV2(bool,invflg) ((bool) ^ !!(e->invflags & invflg))
+// process standard matches
+static inline int ebt_basic_match(struct ebt_entry *e, struct ethhdr *h,
+ const struct net_device *in, const struct net_device *out)
+{
+ int verdict, i;
+
+ if (e->bitmask & EBT_802_3) {
+ if (FWINV2(ntohs(h->h_proto) >= 1536, EBT_IPROTO))
+ return 1;
+ } else if (!(e->bitmask & EBT_NOPROTO) &&
+ FWINV2(e->ethproto != h->h_proto, EBT_IPROTO))
+ return 1;
+
+ if (FWINV2(ebt_dev_check(e->in, in), EBT_IIN))
+ return 1;
+ if (FWINV2(ebt_dev_check(e->out, out), EBT_IOUT))
+ return 1;
+ if ((!in || !in->br_port) ? 0 : FWINV2(ebt_dev_check(
+ e->logical_in, &in->br_port->br->dev), EBT_ILOGICALIN))
+ return 1;
+ if ((!out || !out->br_port) ? 0 : FWINV2(ebt_dev_check(
+ e->logical_out, &out->br_port->br->dev), EBT_ILOGICALOUT))
+ return 1;
+
+ if (e->bitmask & EBT_SOURCEMAC) {
+ verdict = 0;
+ for (i = 0; i < 6; i++)
+ verdict |= (h->h_source[i] ^ e->sourcemac[i]) &
+ e->sourcemsk[i];
+ if (FWINV2(verdict != 0, EBT_ISOURCE) )
+ return 1;
+ }
+ if (e->bitmask & EBT_DESTMAC) {
+ verdict = 0;
+ for (i = 0; i < 6; i++)
+ verdict |= (h->h_dest[i] ^ e->destmac[i]) &
+ e->destmsk[i];
+ if (FWINV2(verdict != 0, EBT_IDEST) )
+ return 1;
+ }
+ return 0;
+}
+
+// Do some firewalling
+unsigned int ebt_do_table (unsigned int hook, struct sk_buff **pskb,
+ const struct net_device *in, const struct net_device *out,
+ struct ebt_table *table)
+{
+ int i, nentries;
+ struct ebt_entry *point;
+ struct ebt_counter *counter_base, *cb_base;
+ struct ebt_entry_target *t;
+ int verdict, sp = 0;
+ struct ebt_chainstack *cs;
+ struct ebt_entries *chaininfo;
+ char *base;
+ struct ebt_table_info *private = table->private;
+
+ read_lock_bh(&table->lock);
+ cb_base = COUNTER_BASE(private->counters, private->nentries,
+ cpu_number_map(smp_processor_id()));
+ if (private->chainstack)
+ cs = private->chainstack[cpu_number_map(smp_processor_id())];
+ else
+ cs = NULL;
+ chaininfo = private->hook_entry[hook];
+ nentries = private->hook_entry[hook]->nentries;
+ point = (struct ebt_entry *)(private->hook_entry[hook]->data);
+ counter_base = cb_base + private->hook_entry[hook]->counter_offset;
+ // base for chain jumps
+ base = private->entries;
+ i = 0;
+ while (i < nentries) {
+ if (ebt_basic_match(point, (**pskb).mac.ethernet, in, out))
+ goto letscontinue;
+
+ if (EBT_MATCH_ITERATE(point, ebt_do_match, *pskb, in, out) != 0)
+ goto letscontinue;
+
+ // increase counter
+ (*(counter_base + i)).pcnt++;
+ (*(counter_base + i)).bcnt+=(**pskb).len;
+
+ // these should only watch: not modify, nor tell us
+ // what to do with the packet
+ EBT_WATCHER_ITERATE(point, ebt_do_watcher, *pskb, hook, in,
+ out);
+
+ t = (struct ebt_entry_target *)
+ (((char *)point) + point->target_offset);
+ // standard target
+ if (!t->u.target->target)
+ verdict = ((struct ebt_standard_target *)t)->verdict;
+ else
+ verdict = t->u.target->target(pskb, hook,
+ in, out, t->data, t->target_size);
+ if (verdict == EBT_ACCEPT) {
+ read_unlock_bh(&table->lock);
+ return NF_ACCEPT;
+ }
+ if (verdict == EBT_DROP) {
+ read_unlock_bh(&table->lock);
+ return NF_DROP;
+ }
+ if (verdict == EBT_RETURN) {
+letsreturn:
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (sp == 0) {
+ BUGPRINT("RETURN on base chain");
+ // act like this is EBT_CONTINUE
+ goto letscontinue;
+ }
+#endif
+ sp--;
+ // put all the local variables right
+ i = cs[sp].n;
+ chaininfo = cs[sp].chaininfo;
+ nentries = chaininfo->nentries;
+ point = cs[sp].e;
+ counter_base = cb_base +
+ chaininfo->counter_offset;
+ continue;
+ }
+ if (verdict == EBT_CONTINUE)
+ goto letscontinue;
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (verdict < 0) {
+ BUGPRINT("bogus standard verdict\n");
+ read_unlock_bh(&table->lock);
+ return NF_DROP;
+ }
+#endif
+ // jump to a udc
+ cs[sp].n = i + 1;
+ cs[sp].chaininfo = chaininfo;
+ cs[sp].e = (struct ebt_entry *)
+ (((char *)point) + point->next_offset);
+ i = 0;
+ chaininfo = (struct ebt_entries *) (base + verdict);
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (chaininfo->distinguisher) {
+ BUGPRINT("jump to non-chain\n");
+ read_unlock_bh(&table->lock);
+ return NF_DROP;
+ }
+#endif
+ nentries = chaininfo->nentries;
+ point = (struct ebt_entry *)chaininfo->data;
+ counter_base = cb_base + chaininfo->counter_offset;
+ sp++;
+ continue;
+letscontinue:
+ point = (struct ebt_entry *)
+ (((char *)point) + point->next_offset);
+ i++;
+ }
+
+ // I actually like this :)
+ if (chaininfo->policy == EBT_RETURN)
+ goto letsreturn;
+ if (chaininfo->policy == EBT_ACCEPT) {
+ read_unlock_bh(&table->lock);
+ return NF_ACCEPT;
+ }
+ read_unlock_bh(&table->lock);
+ return NF_DROP;
+}
+
+// If it succeeds, returns element and locks mutex
+static inline void *
+find_inlist_lock_noload(struct list_head *head, const char *name, int *error,
+ struct semaphore *mutex)
+{
+ void *ret;
+
+ *error = down_interruptible(mutex);
+ if (*error != 0)
+ return NULL;
+
+ ret = list_named_find(head, name);
+ if (!ret) {
+ *error = -ENOENT;
+ up(mutex);
+ }
+ return ret;
+}
+
+#ifndef CONFIG_KMOD
+#define find_inlist_lock(h,n,p,e,m) find_inlist_lock_noload((h),(n),(e),(m))
+#else
+static void *
+find_inlist_lock(struct list_head *head, const char *name, const char *prefix,
+ int *error, struct semaphore *mutex)
+{
+ void *ret;
+
+ ret = find_inlist_lock_noload(head, name, error, mutex);
+ if (!ret) {
+ char modulename[EBT_FUNCTION_MAXNAMELEN + strlen(prefix) + 1];
+ strcpy(modulename, prefix);
+ strcat(modulename, name);
+ request_module(modulename);
+ ret = find_inlist_lock_noload(head, name, error, mutex);
+ }
+ return ret;
+}
+#endif
+
+static inline struct ebt_table *
+find_table_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ebt_tables, name, "ebtable_", error, mutex);
+}
+
+static inline struct ebt_match *
+find_match_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ebt_matches, name, "ebt_", error, mutex);
+}
+
+static inline struct ebt_watcher *
+find_watcher_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ebt_watchers, name, "ebt_", error, mutex);
+}
+
+static inline struct ebt_target *
+find_target_lock(const char *name, int *error, struct semaphore *mutex)
+{
+ return find_inlist_lock(&ebt_targets, name, "ebt_", error, mutex);
+}
+
+static inline int
+ebt_check_match(struct ebt_entry_match *m, struct ebt_entry *e,
+ const char *name, unsigned int hookmask, unsigned int *cnt)
+{
+ struct ebt_match *match;
+ int ret;
+
+ if (((char *)m) + m->match_size + sizeof(struct ebt_entry_match) >
+ ((char *)e) + e->watchers_offset)
+ return -EINVAL;
+ match = find_match_lock(m->u.name, &ret, &ebt_mutex);
+ if (!match)
+ return ret;
+ m->u.match = match;
+ if (match->me)
+ __MOD_INC_USE_COUNT(match->me);
+ up(&ebt_mutex);
+ if (match->check &&
+ match->check(name, hookmask, e, m->data, m->match_size) != 0) {
+ BUGPRINT("match->check failed\n");
+ if (match->me)
+ __MOD_DEC_USE_COUNT(match->me);
+ return -EINVAL;
+ }
+ (*cnt)++;
+ return 0;
+}
+
+static inline int
+ebt_check_watcher(struct ebt_entry_watcher *w, struct ebt_entry *e,
+ const char *name, unsigned int hookmask, unsigned int *cnt)
+{
+ struct ebt_watcher *watcher;
+ int ret;
+
+ if (((char *)w) + w->watcher_size + sizeof(struct ebt_entry_watcher) >
+ ((char *)e) + e->target_offset)
+ return -EINVAL;
+ watcher = find_watcher_lock(w->u.name, &ret, &ebt_mutex);
+ if (!watcher)
+ return ret;
+ w->u.watcher = watcher;
+ if (watcher->me)
+ __MOD_INC_USE_COUNT(watcher->me);
+ up(&ebt_mutex);
+ if (watcher->check &&
+ watcher->check(name, hookmask, e, w->data, w->watcher_size) != 0) {
+ BUGPRINT("watcher->check failed\n");
+ if (watcher->me)
+ __MOD_DEC_USE_COUNT(watcher->me);
+ return -EINVAL;
+ }
+ (*cnt)++;
+ return 0;
+}
+
+// this one is very careful, as it is the first function
+// to parse the userspace data
+static inline int
+ebt_check_entry_size_and_hooks(struct ebt_entry *e,
+ struct ebt_table_info *newinfo, char *base, char *limit,
+ struct ebt_entries **hook_entries, unsigned int *n, unsigned int *cnt,
+ unsigned int *totalcnt, unsigned int *udc_cnt, unsigned int valid_hooks)
+{
+ int i;
+
+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+ if ((valid_hooks & (1 << i)) == 0)
+ continue;
+ if ( (char *)hook_entries[i] - base ==
+ (char *)e - newinfo->entries)
+ break;
+ }
+ // beginning of a new chain
+ // if i == NF_BR_NUMHOOKS it must be a user defined chain
+ if (i != NF_BR_NUMHOOKS || !(e->bitmask & EBT_ENTRY_OR_ENTRIES)) {
+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) != 0) {
+ // we make userspace set this right,
+ // so there is no misunderstanding
+ BUGPRINT("EBT_ENTRY_OR_ENTRIES shouldn't be set "
+ "in distinguisher\n");
+ return -EINVAL;
+ }
+ // this checks if the previous chain has as many entries
+ // as it said it has
+ if (*n != *cnt) {
+ BUGPRINT("nentries does not equal the nr of entries "
+ "in the chain\n");
+ return -EINVAL;
+ }
+ // before we look at the struct, be sure it is not too big
+ if ((char *)hook_entries[i] + sizeof(struct ebt_entries)
+ > limit) {
+ BUGPRINT("entries_size too small\n");
+ return -EINVAL;
+ }
+ if (((struct ebt_entries *)e)->policy != EBT_DROP &&
+ ((struct ebt_entries *)e)->policy != EBT_ACCEPT) {
+ // only RETURN from udc
+ if (i != NF_BR_NUMHOOKS ||
+ ((struct ebt_entries *)e)->policy != EBT_RETURN) {
+ BUGPRINT("bad policy\n");
+ return -EINVAL;
+ }
+ }
+ if (i == NF_BR_NUMHOOKS) // it's a user defined chain
+ (*udc_cnt)++;
+ else
+ newinfo->hook_entry[i] = (struct ebt_entries *)e;
+ if (((struct ebt_entries *)e)->counter_offset != *totalcnt) {
+ BUGPRINT("counter_offset != totalcnt");
+ return -EINVAL;
+ }
+ *n = ((struct ebt_entries *)e)->nentries;
+ *cnt = 0;
+ return 0;
+ }
+ // a plain old entry, heh
+ if (sizeof(struct ebt_entry) > e->watchers_offset ||
+ e->watchers_offset > e->target_offset ||
+ e->target_offset >= e->next_offset) {
+ BUGPRINT("entry offsets not in right order\n");
+ return -EINVAL;
+ }
+ // this is not checked anywhere else
+ if (e->next_offset - e->target_offset < sizeof(struct ebt_entry_target)) {
+ BUGPRINT("target size too small\n");
+ return -EINVAL;
+ }
+
+ (*cnt)++;
+ (*totalcnt)++;
+ return 0;
+}
+
+struct ebt_cl_stack
+{
+ struct ebt_chainstack cs;
+ int from;
+ unsigned int hookmask;
+};
+
+// we need these positions to check that the jumps to a different part of the
+// entries is a jump to the beginning of a new chain.
+static inline int
+ebt_get_udc_positions(struct ebt_entry *e, struct ebt_table_info *newinfo,
+ struct ebt_entries **hook_entries, unsigned int *n, unsigned int valid_hooks,
+ struct ebt_cl_stack *udc)
+{
+ int i;
+
+ // we're only interested in chain starts
+ if (e->bitmask & EBT_ENTRY_OR_ENTRIES)
+ return 0;
+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+ if ((valid_hooks & (1 << i)) == 0)
+ continue;
+ if (newinfo->hook_entry[i] == (struct ebt_entries *)e)
+ break;
+ }
+ // only care about udc
+ if (i != NF_BR_NUMHOOKS)
+ return 0;
+
+ udc[*n].cs.chaininfo = (struct ebt_entries *)e;
+ // these initialisations are depended on later in check_chainloops()
+ udc[*n].cs.n = 0;
+ udc[*n].hookmask = 0;
+
+ (*n)++;
+ return 0;
+}
+
+static inline int
+ebt_cleanup_match(struct ebt_entry_match *m, unsigned int *i)
+{
+ if (i && (*i)-- == 0)
+ return 1;
+ if (m->u.match->destroy)
+ m->u.match->destroy(m->data, m->match_size);
+ if (m->u.match->me)
+ __MOD_DEC_USE_COUNT(m->u.match->me);
+
+ return 0;
+}
+
+static inline int
+ebt_cleanup_watcher(struct ebt_entry_watcher *w, unsigned int *i)
+{
+ if (i && (*i)-- == 0)
+ return 1;
+ if (w->u.watcher->destroy)
+ w->u.watcher->destroy(w->data, w->watcher_size);
+ if (w->u.watcher->me)
+ __MOD_DEC_USE_COUNT(w->u.watcher->me);
+
+ return 0;
+}
+
+static inline int
+ebt_cleanup_entry(struct ebt_entry *e, unsigned int *cnt)
+{
+ struct ebt_entry_target *t;
+
+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
+ return 0;
+ // we're done
+ if (cnt && (*cnt)-- == 0)
+ return 1;
+ EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, NULL);
+ EBT_MATCH_ITERATE(e, ebt_cleanup_match, NULL);
+ t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+ if (t->u.target->destroy)
+ t->u.target->destroy(t->data, t->target_size);
+ if (t->u.target->me)
+ __MOD_DEC_USE_COUNT(t->u.target->me);
+
+ return 0;
+}
+
+static inline int
+ebt_check_entry(struct ebt_entry *e, struct ebt_table_info *newinfo,
+ const char *name, unsigned int *cnt, unsigned int valid_hooks,
+ struct ebt_cl_stack *cl_s, unsigned int udc_cnt)
+{
+ struct ebt_entry_target *t;
+ struct ebt_target *target;
+ unsigned int i, j, hook = 0, hookmask = 0;
+ int ret;
+
+ // Don't mess with the struct ebt_entries
+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
+ return 0;
+
+ if (e->bitmask & ~EBT_F_MASK) {
+ BUGPRINT("Unknown flag for bitmask\n");
+ return -EINVAL;
+ }
+ if (e->invflags & ~EBT_INV_MASK) {
+ BUGPRINT("Unknown flag for inv bitmask\n");
+ return -EINVAL;
+ }
+ if ( (e->bitmask & EBT_NOPROTO) && (e->bitmask & EBT_802_3) ) {
+ BUGPRINT("NOPROTO & 802_3 not allowed\n");
+ return -EINVAL;
+ }
+ // what hook do we belong to?
+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+ if ((valid_hooks & (1 << i)) == 0)
+ continue;
+ if ((char *)newinfo->hook_entry[i] < (char *)e)
+ hook = i;
+ else
+ break;
+ }
+ // (1 << NF_BR_NUMHOOKS) tells the check functions the rule is on
+ // a base chain
+ if (i < NF_BR_NUMHOOKS)
+ hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
+ else {
+ for (i = 0; i < udc_cnt; i++)
+ if ((char *)(cl_s[i].cs.chaininfo) > (char *)e)
+ break;
+ if (i == 0)
+ hookmask = (1 << hook) | (1 << NF_BR_NUMHOOKS);
+ else
+ hookmask = cl_s[i - 1].hookmask;
+ }
+ i = 0;
+ ret = EBT_MATCH_ITERATE(e, ebt_check_match, e, name, hookmask, &i);
+ if (ret != 0)
+ goto cleanup_matches;
+ j = 0;
+ ret = EBT_WATCHER_ITERATE(e, ebt_check_watcher, e, name, hookmask, &j);
+ if (ret != 0)
+ goto cleanup_watchers;
+ t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+ target = find_target_lock(t->u.name, &ret, &ebt_mutex);
+ if (!target)
+ goto cleanup_watchers;
+ if (target->me)
+ __MOD_INC_USE_COUNT(target->me);
+ up(&ebt_mutex);
+
+ t->u.target = target;
+ if (t->u.target == &ebt_standard_target) {
+ if (e->target_offset + sizeof(struct ebt_standard_target) >
+ e->next_offset) {
+ BUGPRINT("Standard target size too big\n");
+ ret = -EFAULT;
+ goto cleanup_watchers;
+ }
+ if (((struct ebt_standard_target *)t)->verdict <
+ -NUM_STANDARD_TARGETS) {
+ BUGPRINT("Invalid standard target\n");
+ ret = -EFAULT;
+ goto cleanup_watchers;
+ }
+ } else if ((e->target_offset + t->target_size +
+ sizeof(struct ebt_entry_target) > e->next_offset) ||
+ (t->u.target->check &&
+ t->u.target->check(name, hookmask, e, t->data, t->target_size) != 0)){
+ if (t->u.target->me)
+ __MOD_DEC_USE_COUNT(t->u.target->me);
+ ret = -EFAULT;
+ goto cleanup_watchers;
+ }
+ (*cnt)++;
+ return 0;
+cleanup_watchers:
+ EBT_WATCHER_ITERATE(e, ebt_cleanup_watcher, &j);
+cleanup_matches:
+ EBT_MATCH_ITERATE(e, ebt_cleanup_match, &i);
+ return ret;
+}
+
+// checks for loops and sets the hook mask for udc
+// the hook mask for udc tells us from which base chains the udc can be
+// accessed. This mask is a parameter to the check() functions of the extensions
+static int check_chainloops(struct ebt_entries *chain,
+ struct ebt_cl_stack *cl_s, unsigned int udc_cnt,
+ unsigned int hooknr, char *base)
+{
+ int i, chain_nr = -1, pos = 0, nentries = chain->nentries, verdict;
+ struct ebt_entry *e = (struct ebt_entry *)chain->data;
+ struct ebt_entry_target *t;
+
+ while (pos < nentries || chain_nr != -1) {
+ // end of udc, go back one 'recursion' step
+ if (pos == nentries) {
+ // put back values of the time when this chain was called
+ e = cl_s[chain_nr].cs.e;
+ if (cl_s[chain_nr].from != -1)
+ nentries =
+ cl_s[cl_s[chain_nr].from].cs.chaininfo->nentries;
+ else
+ nentries = chain->nentries;
+ pos = cl_s[chain_nr].cs.n;
+ // make sure we won't see a loop that isn't one
+ cl_s[chain_nr].cs.n = 0;
+ chain_nr = cl_s[chain_nr].from;
+ if (pos == nentries)
+ continue;
+ }
+ t = (struct ebt_entry_target *)
+ (((char *)e) + e->target_offset);
+ if (strcmp(t->u.name, EBT_STANDARD_TARGET))
+ goto letscontinue;
+ if (e->target_offset + sizeof(struct ebt_standard_target) >
+ e->next_offset) {
+ BUGPRINT("Standard target size too big\n");
+ return -1;
+ }
+ verdict = ((struct ebt_standard_target *)t)->verdict;
+ if (verdict >= 0) { // jump to another chain
+ struct ebt_entries *hlp2 =
+ (struct ebt_entries *)(base + verdict);
+ for (i = 0; i < udc_cnt; i++)
+ if (hlp2 == cl_s[i].cs.chaininfo)
+ break;
+ // bad destination or loop
+ if (i == udc_cnt) {
+ BUGPRINT("bad destination\n");
+ return -1;
+ }
+ if (cl_s[i].cs.n) {
+ BUGPRINT("loop\n");
+ return -1;
+ }
+ // this can't be 0, so the above test is correct
+ cl_s[i].cs.n = pos + 1;
+ pos = 0;
+ cl_s[i].cs.e = ((void *)e + e->next_offset);
+ e = (struct ebt_entry *)(hlp2->data);
+ nentries = hlp2->nentries;
+ cl_s[i].from = chain_nr;
+ chain_nr = i;
+ // this udc is accessible from the base chain for hooknr
+ cl_s[i].hookmask |= (1 << hooknr);
+ continue;
+ }
+letscontinue:
+ e = (void *)e + e->next_offset;
+ pos++;
+ }
+ return 0;
+}
+
+// do the parsing of the table/chains/entries/matches/watchers/targets, heh
+static int translate_table(struct ebt_replace *repl,
+ struct ebt_table_info *newinfo)
+{
+ unsigned int i, j, k, udc_cnt;
+ int ret;
+ struct ebt_cl_stack *cl_s = NULL; // used in the checking for chain loops
+
+ i = 0;
+ while (i < NF_BR_NUMHOOKS && !(repl->valid_hooks & (1 << i)))
+ i++;
+ if (i == NF_BR_NUMHOOKS) {
+ BUGPRINT("No valid hooks specified\n");
+ return -EINVAL;
+ }
+ if (repl->hook_entry[i] != (struct ebt_entries *)repl->entries) {
+ BUGPRINT("Chains don't start at beginning\n");
+ return -EINVAL;
+ }
+ // make sure chains are ordered after each other in same order
+ // as their corresponding hooks
+ for (j = i + 1; j < NF_BR_NUMHOOKS; j++) {
+ if (!(repl->valid_hooks & (1 << j)))
+ continue;
+ if ( repl->hook_entry[j] <= repl->hook_entry[i] ) {
+ BUGPRINT("Hook order must be followed\n");
+ return -EINVAL;
+ }
+ i = j;
+ }
+
+ for (i = 0; i < NF_BR_NUMHOOKS; i++)
+ newinfo->hook_entry[i] = NULL;
+
+ newinfo->entries_size = repl->entries_size;
+ newinfo->nentries = repl->nentries;
+
+ // do some early checkings and initialize some things
+ i = 0; // holds the expected nr. of entries for the chain
+ j = 0; // holds the up to now counted entries for the chain
+ k = 0; // holds the total nr. of entries, should equal
+ // newinfo->nentries afterwards
+ udc_cnt = 0; // will hold the nr. of user defined chains (udc)
+ ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+ ebt_check_entry_size_and_hooks, newinfo, repl->entries,
+ repl->entries + repl->entries_size, repl->hook_entry, &i, &j, &k,
+ &udc_cnt, repl->valid_hooks);
+
+ if (ret != 0)
+ return ret;
+
+ if (i != j) {
+ BUGPRINT("nentries does not equal the nr of entries in the "
+ "(last) chain\n");
+ return -EINVAL;
+ }
+ if (k != newinfo->nentries) {
+ BUGPRINT("Total nentries is wrong\n");
+ return -EINVAL;
+ }
+
+ // check if all valid hooks have a chain
+ for (i = 0; i < NF_BR_NUMHOOKS; i++) {
+ if (newinfo->hook_entry[i] == NULL &&
+ (repl->valid_hooks & (1 << i))) {
+ BUGPRINT("Valid hook without chain\n");
+ return -EINVAL;
+ }
+ }
+
+ // Get the location of the udc, put them in an array
+ // While we're at it, allocate the chainstack
+ if (udc_cnt) {
+ // this will get free'd in do_replace()/ebt_register_table()
+ // if an error occurs
+ newinfo->chainstack = (struct ebt_chainstack **)
+ vmalloc(smp_num_cpus * sizeof(struct ebt_chainstack));
+ if (!newinfo->chainstack)
+ return -ENOMEM;
+ for (i = 0; i < smp_num_cpus; i++) {
+ newinfo->chainstack[i] =
+ vmalloc(udc_cnt * sizeof(struct ebt_chainstack));
+ if (!newinfo->chainstack[i]) {
+ while (i)
+ vfree(newinfo->chainstack[--i]);
+ vfree(newinfo->chainstack);
+ newinfo->chainstack = NULL;
+ return -ENOMEM;
+ }
+ }
+
+ cl_s = (struct ebt_cl_stack *)
+ vmalloc(udc_cnt * sizeof(struct ebt_cl_stack));
+ if (!cl_s)
+ return -ENOMEM;
+ i = 0; // the i'th udc
+ EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+ ebt_get_udc_positions, newinfo, repl->hook_entry, &i,
+ repl->valid_hooks, cl_s);
+ // sanity check
+ if (i != udc_cnt) {
+ BUGPRINT("i != udc_cnt\n");
+ vfree(cl_s);
+ return -EFAULT;
+ }
+ }
+
+ // Check for loops
+ for (i = 0; i < NF_BR_NUMHOOKS; i++)
+ if (repl->valid_hooks & (1 << i))
+ if (check_chainloops(newinfo->hook_entry[i],
+ cl_s, udc_cnt, i, newinfo->entries)) {
+ if (cl_s)
+ vfree(cl_s);
+ return -EINVAL;
+ }
+
+ // we now know the following (along with E=mc<6D>):
+ // - the nr of entries in each chain is right
+ // - the size of the allocated space is right
+ // - all valid hooks have a corresponding chain
+ // - there are no loops
+ // - wrong data can still be on the level of a single entry
+ // - could be there are jumps to places that are not the
+ // beginning of a chain. This can only occur in chains that
+ // are not accessible from any base chains, so we don't care.
+
+ // used to know what we need to clean up if something goes wrong
+ i = 0;
+ ret = EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+ ebt_check_entry, newinfo, repl->name, &i, repl->valid_hooks,
+ cl_s, udc_cnt);
+ if (ret != 0) {
+ EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+ ebt_cleanup_entry, &i);
+ }
+ if (cl_s)
+ vfree(cl_s);
+ return ret;
+}
+
+// called under write_lock
+static void get_counters(struct ebt_counter *oldcounters,
+ struct ebt_counter *counters, unsigned int nentries)
+{
+ int i, cpu;
+ struct ebt_counter *counter_base;
+
+ // counters of cpu 0
+ memcpy(counters, oldcounters,
+ sizeof(struct ebt_counter) * nentries);
+ // add other counters to those of cpu 0
+ for (cpu = 1; cpu < smp_num_cpus; cpu++) {
+ counter_base = COUNTER_BASE(oldcounters, nentries, cpu);
+ for (i = 0; i < nentries; i++) {
+ counters[i].pcnt += counter_base[i].pcnt;
+ counters[i].bcnt += counter_base[i].bcnt;
+ }
+ }
+}
+
+// replace the table
+static int do_replace(void *user, unsigned int len)
+{
+ int ret, i, countersize;
+ struct ebt_table_info *newinfo;
+ struct ebt_replace tmp;
+ struct ebt_table *t;
+ struct ebt_counter *counterstmp = NULL;
+ // used to be able to unlock earlier
+ struct ebt_table_info *table;
+
+ if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ return -EFAULT;
+
+ if (len != sizeof(tmp) + tmp.entries_size) {
+ BUGPRINT("Wrong len argument\n");
+ return -EINVAL;
+ }
+
+ if (tmp.entries_size == 0) {
+ BUGPRINT("Entries_size never zero\n");
+ return -EINVAL;
+ }
+ countersize = COUNTER_OFFSET(tmp.nentries) * smp_num_cpus;
+ newinfo = (struct ebt_table_info *)
+ vmalloc(sizeof(struct ebt_table_info) + countersize);
+ if (!newinfo)
+ return -ENOMEM;
+
+ if (countersize)
+ memset(newinfo->counters, 0, countersize);
+
+ newinfo->entries = (char *)vmalloc(tmp.entries_size);
+ if (!newinfo->entries) {
+ ret = -ENOMEM;
+ goto free_newinfo;
+ }
+ if (copy_from_user(
+ newinfo->entries, tmp.entries, tmp.entries_size) != 0) {
+ BUGPRINT("Couldn't copy entries from userspace\n");
+ ret = -EFAULT;
+ goto free_entries;
+ }
+
+ // the user wants counters back
+ // the check on the size is done later, when we have the lock
+ if (tmp.num_counters) {
+ counterstmp = (struct ebt_counter *)
+ vmalloc(tmp.num_counters * sizeof(struct ebt_counter));
+ if (!counterstmp) {
+ ret = -ENOMEM;
+ goto free_entries;
+ }
+ }
+ else
+ counterstmp = NULL;
+
+ // this can get initialized by translate_table()
+ newinfo->chainstack = NULL;
+ ret = translate_table(&tmp, newinfo);
+
+ if (ret != 0)
+ goto free_counterstmp;
+
+ t = find_table_lock(tmp.name, &ret, &ebt_mutex);
+ if (!t)
+ goto free_iterate;
+
+ // the table doesn't like it
+ if (t->check && (ret = t->check(newinfo, tmp.valid_hooks)))
+ goto free_unlock;
+
+ if (tmp.num_counters && tmp.num_counters != t->private->nentries) {
+ BUGPRINT("Wrong nr. of counters requested\n");
+ ret = -EINVAL;
+ goto free_unlock;
+ }
+
+ // we have the mutex lock, so no danger in reading this pointer
+ table = t->private;
+ // we need an atomic snapshot of the counters
+ write_lock_bh(&t->lock);
+ if (tmp.num_counters)
+ get_counters(t->private->counters, counterstmp,
+ t->private->nentries);
+
+ t->private = newinfo;
+ write_unlock_bh(&t->lock);
+ up(&ebt_mutex);
+ // So, a user can change the chains while having messed up her counter
+ // allocation. Only reason why this is done is because this way the lock
+ // is held only once, while this doesn't bring the kernel into a
+ // dangerous state.
+ if (tmp.num_counters &&
+ copy_to_user(tmp.counters, counterstmp,
+ tmp.num_counters * sizeof(struct ebt_counter))) {
+ BUGPRINT("Couldn't copy counters to userspace\n");
+ ret = -EFAULT;
+ }
+ else
+ ret = 0;
+
+ // decrease module count and free resources
+ EBT_ENTRY_ITERATE(table->entries, table->entries_size,
+ ebt_cleanup_entry, NULL);
+
+ vfree(table->entries);
+ if (table->chainstack) {
+ for (i = 0; i < smp_num_cpus; i++)
+ vfree(table->chainstack[i]);
+ vfree(table->chainstack);
+ }
+ vfree(table);
+
+ if (counterstmp)
+ vfree(counterstmp);
+ return ret;
+
+free_unlock:
+ up(&ebt_mutex);
+free_iterate:
+ EBT_ENTRY_ITERATE(newinfo->entries, newinfo->entries_size,
+ ebt_cleanup_entry, NULL);
+free_counterstmp:
+ if (counterstmp)
+ vfree(counterstmp);
+ // can be initialized in translate_table()
+ if (newinfo->chainstack) {
+ for (i = 0; i < smp_num_cpus; i++)
+ vfree(newinfo->chainstack[i]);
+ vfree(newinfo->chainstack);
+ }
+free_entries:
+ if (newinfo->entries)
+ vfree(newinfo->entries);
+free_newinfo:
+ if (newinfo)
+ vfree(newinfo);
+ return ret;
+}
+
+int ebt_register_target(struct ebt_target *target)
+{
+ int ret;
+
+ ret = down_interruptible(&ebt_mutex);
+ if (ret != 0)
+ return ret;
+ if (!list_named_insert(&ebt_targets, target)) {
+ up(&ebt_mutex);
+ return -EEXIST;
+ }
+ up(&ebt_mutex);
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+void ebt_unregister_target(struct ebt_target *target)
+{
+ down(&ebt_mutex);
+ LIST_DELETE(&ebt_targets, target);
+ up(&ebt_mutex);
+ MOD_DEC_USE_COUNT;
+}
+
+int ebt_register_match(struct ebt_match *match)
+{
+ int ret;
+
+ ret = down_interruptible(&ebt_mutex);
+ if (ret != 0)
+ return ret;
+ if (!list_named_insert(&ebt_matches, match)) {
+ up(&ebt_mutex);
+ return -EEXIST;
+ }
+ up(&ebt_mutex);
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+void ebt_unregister_match(struct ebt_match *match)
+{
+ down(&ebt_mutex);
+ LIST_DELETE(&ebt_matches, match);
+ up(&ebt_mutex);
+ MOD_DEC_USE_COUNT;
+}
+
+int ebt_register_watcher(struct ebt_watcher *watcher)
+{
+ int ret;
+
+ ret = down_interruptible(&ebt_mutex);
+ if (ret != 0)
+ return ret;
+ if (!list_named_insert(&ebt_watchers, watcher)) {
+ up(&ebt_mutex);
+ return -EEXIST;
+ }
+ up(&ebt_mutex);
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+void ebt_unregister_watcher(struct ebt_watcher *watcher)
+{
+ down(&ebt_mutex);
+ LIST_DELETE(&ebt_watchers, watcher);
+ up(&ebt_mutex);
+ MOD_DEC_USE_COUNT;
+}
+
+int ebt_register_table(struct ebt_table *table)
+{
+ struct ebt_table_info *newinfo;
+ int ret, i, countersize;
+
+ if (!table || !table->table ||!table->table->entries ||
+ table->table->entries_size == 0 ||
+ table->table->counters || table->private) {
+ BUGPRINT("Bad table data for ebt_register_table!!!\n");
+ return -EINVAL;
+ }
+
+ countersize = COUNTER_OFFSET(table->table->nentries) * smp_num_cpus;
+ newinfo = (struct ebt_table_info *)
+ vmalloc(sizeof(struct ebt_table_info) + countersize);
+ ret = -ENOMEM;
+ if (!newinfo)
+ return -ENOMEM;
+
+ newinfo->entries = (char *)vmalloc(table->table->entries_size);
+ if (!(newinfo->entries))
+ goto free_newinfo;
+
+ memcpy(newinfo->entries, table->table->entries,
+ table->table->entries_size);
+
+ if (countersize)
+ memset(newinfo->counters, 0, countersize);
+
+ // fill in newinfo and parse the entries
+ newinfo->chainstack = NULL;
+ ret = translate_table(table->table, newinfo);
+ if (ret != 0) {
+ BUGPRINT("Translate_table failed\n");
+ goto free_chainstack;
+ }
+
+ if (table->check && table->check(newinfo, table->valid_hooks)) {
+ BUGPRINT("The table doesn't like its own initial data, lol\n");
+ return -EINVAL;
+ }
+
+ table->private = newinfo;
+ table->lock = RW_LOCK_UNLOCKED;
+ ret = down_interruptible(&ebt_mutex);
+ if (ret != 0)
+ goto free_chainstack;
+
+ if (list_named_find(&ebt_tables, table->name)) {
+ ret = -EEXIST;
+ BUGPRINT("Table name already exists\n");
+ goto free_unlock;
+ }
+
+ list_prepend(&ebt_tables, table);
+ up(&ebt_mutex);
+ MOD_INC_USE_COUNT;
+ return 0;
+free_unlock:
+ up(&ebt_mutex);
+free_chainstack:
+ if (newinfo->chainstack) {
+ for (i = 0; i < smp_num_cpus; i++)
+ vfree(newinfo->chainstack[i]);
+ vfree(newinfo->chainstack);
+ }
+ vfree(newinfo->entries);
+free_newinfo:
+ vfree(newinfo);
+ return ret;
+}
+
+void ebt_unregister_table(struct ebt_table *table)
+{
+ int i;
+
+ if (!table) {
+ BUGPRINT("Request to unregister NULL table!!!\n");
+ return;
+ }
+ down(&ebt_mutex);
+ LIST_DELETE(&ebt_tables, table);
+ up(&ebt_mutex);
+ EBT_ENTRY_ITERATE(table->private->entries,
+ table->private->entries_size, ebt_cleanup_entry, NULL);
+ if (table->private->entries)
+ vfree(table->private->entries);
+ if (table->private->chainstack) {
+ for (i = 0; i < smp_num_cpus; i++)
+ vfree(table->private->chainstack[i]);
+ vfree(table->private->chainstack);
+ }
+ vfree(table->private);
+ MOD_DEC_USE_COUNT;
+}
+
+// userspace just supplied us with counters
+static int update_counters(void *user, unsigned int len)
+{
+ int i, ret;
+ struct ebt_counter *tmp;
+ struct ebt_replace hlp;
+ struct ebt_table *t;
+
+ if (copy_from_user(&hlp, user, sizeof(hlp)))
+ return -EFAULT;
+
+ if (len != sizeof(hlp) + hlp.num_counters * sizeof(struct ebt_counter))
+ return -EINVAL;
+ if (hlp.num_counters == 0)
+ return -EINVAL;
+
+ if ( !(tmp = (struct ebt_counter *)
+ vmalloc(hlp.num_counters * sizeof(struct ebt_counter))) ){
+ MEMPRINT("Update_counters && nomemory\n");
+ return -ENOMEM;
+ }
+
+ t = find_table_lock(hlp.name, &ret, &ebt_mutex);
+ if (!t)
+ goto free_tmp;
+
+ if (hlp.num_counters != t->private->nentries) {
+ BUGPRINT("Wrong nr of counters\n");
+ ret = -EINVAL;
+ goto unlock_mutex;
+ }
+
+ if ( copy_from_user(tmp, hlp.counters,
+ hlp.num_counters * sizeof(struct ebt_counter)) ) {
+ BUGPRINT("Updata_counters && !cfu\n");
+ ret = -EFAULT;
+ goto unlock_mutex;
+ }
+
+ // we want an atomic add of the counters
+ write_lock_bh(&t->lock);
+
+ // we add to the counters of the first cpu
+ for (i = 0; i < hlp.num_counters; i++) {
+ t->private->counters[i].pcnt += tmp[i].pcnt;
+ t->private->counters[i].bcnt += tmp[i].bcnt;
+ }
+
+ write_unlock_bh(&t->lock);
+ ret = 0;
+unlock_mutex:
+ up(&ebt_mutex);
+free_tmp:
+ vfree(tmp);
+ return ret;
+}
+
+static inline int ebt_make_matchname(struct ebt_entry_match *m,
+ char *base, char *ubase)
+{
+ char *hlp = ubase - base + (char *)m;
+ if (copy_to_user(hlp, m->u.match->name, EBT_FUNCTION_MAXNAMELEN))
+ return -EFAULT;
+ return 0;
+}
+
+static inline int ebt_make_watchername(struct ebt_entry_watcher *w,
+ char *base, char *ubase)
+{
+ char *hlp = ubase - base + (char *)w;
+ if (copy_to_user(hlp , w->u.watcher->name, EBT_FUNCTION_MAXNAMELEN))
+ return -EFAULT;
+ return 0;
+}
+
+static inline int ebt_make_names(struct ebt_entry *e, char *base, char *ubase)
+{
+ int ret;
+ char *hlp;
+ struct ebt_entry_target *t;
+
+ if ((e->bitmask & EBT_ENTRY_OR_ENTRIES) == 0)
+ return 0;
+
+ hlp = ubase - base + (char *)e + e->target_offset;
+ t = (struct ebt_entry_target *)(((char *)e) + e->target_offset);
+
+ ret = EBT_MATCH_ITERATE(e, ebt_make_matchname, base, ubase);
+ if (ret != 0)
+ return ret;
+ ret = EBT_WATCHER_ITERATE(e, ebt_make_watchername, base, ubase);
+ if (ret != 0)
+ return ret;
+ if (copy_to_user(hlp, t->u.target->name, EBT_FUNCTION_MAXNAMELEN))
+ return -EFAULT;
+ return 0;
+}
+
+// called with ebt_mutex down
+static int copy_everything_to_user(struct ebt_table *t, void *user,
+ int *len, int cmd)
+{
+ struct ebt_replace tmp;
+ struct ebt_counter *counterstmp, *oldcounters;
+ unsigned int entries_size, nentries;
+ char *entries;
+
+ if (cmd == EBT_SO_GET_ENTRIES) {
+ entries_size = t->private->entries_size;
+ nentries = t->private->nentries;
+ entries = t->private->entries;
+ oldcounters = t->private->counters;
+ } else {
+ entries_size = t->table->entries_size;
+ nentries = t->table->nentries;
+ entries = t->table->entries;
+ oldcounters = t->table->counters;
+ }
+
+ if (copy_from_user(&tmp, user, sizeof(tmp))) {
+ BUGPRINT("Cfu didn't work\n");
+ return -EFAULT;
+ }
+
+ if (*len != sizeof(struct ebt_replace) + entries_size +
+ (tmp.num_counters? nentries * sizeof(struct ebt_counter): 0)) {
+ BUGPRINT("Wrong size\n");
+ return -EINVAL;
+ }
+
+ if (tmp.nentries != nentries) {
+ BUGPRINT("Nentries wrong\n");
+ return -EINVAL;
+ }
+
+ if (tmp.entries_size != entries_size) {
+ BUGPRINT("Wrong size\n");
+ return -EINVAL;
+ }
+
+ // userspace might not need the counters
+ if (tmp.num_counters) {
+ if (tmp.num_counters != nentries) {
+ BUGPRINT("Num_counters wrong\n");
+ return -EINVAL;
+ }
+ counterstmp = (struct ebt_counter *)
+ vmalloc(nentries * sizeof(struct ebt_counter));
+ if (!counterstmp) {
+ MEMPRINT("Couldn't copy counters, out of memory\n");
+ return -ENOMEM;
+ }
+ write_lock_bh(&t->lock);
+ get_counters(oldcounters, counterstmp, nentries);
+ write_unlock_bh(&t->lock);
+
+ if (copy_to_user(tmp.counters, counterstmp,
+ nentries * sizeof(struct ebt_counter))) {
+ BUGPRINT("Couldn't copy counters to userspace\n");
+ vfree(counterstmp);
+ return -EFAULT;
+ }
+ vfree(counterstmp);
+ }
+
+ if (copy_to_user(tmp.entries, entries, entries_size)) {
+ BUGPRINT("Couldn't copy entries to userspace\n");
+ return -EFAULT;
+ }
+ // set the match/watcher/target names right
+ return EBT_ENTRY_ITERATE(entries, entries_size,
+ ebt_make_names, entries, tmp.entries);
+}
+
+static int do_ebt_set_ctl(struct sock *sk,
+ int cmd, void *user, unsigned int len)
+{
+ int ret;
+
+ switch(cmd) {
+ case EBT_SO_SET_ENTRIES:
+ ret = do_replace(user, len);
+ break;
+ case EBT_SO_SET_COUNTERS:
+ ret = update_counters(user, len);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static int do_ebt_get_ctl(struct sock *sk, int cmd, void *user, int *len)
+{
+ int ret;
+ struct ebt_replace tmp;
+ struct ebt_table *t;
+
+ if (copy_from_user(&tmp, user, sizeof(tmp)))
+ return -EFAULT;
+
+ t = find_table_lock(tmp.name, &ret, &ebt_mutex);
+ if (!t)
+ return ret;
+
+ switch(cmd) {
+ case EBT_SO_GET_INFO:
+ case EBT_SO_GET_INIT_INFO:
+ if (*len != sizeof(struct ebt_replace)){
+ ret = -EINVAL;
+ up(&ebt_mutex);
+ break;
+ }
+ if (cmd == EBT_SO_GET_INFO) {
+ tmp.nentries = t->private->nentries;
+ tmp.entries_size = t->private->entries_size;
+ tmp.valid_hooks = t->valid_hooks;
+ } else {
+ tmp.nentries = t->table->nentries;
+ tmp.entries_size = t->table->entries_size;
+ tmp.valid_hooks = t->table->valid_hooks;
+ }
+ up(&ebt_mutex);
+ if (copy_to_user(user, &tmp, *len) != 0){
+ BUGPRINT("c2u Didn't work\n");
+ ret = -EFAULT;
+ break;
+ }
+ ret = 0;
+ break;
+
+ case EBT_SO_GET_ENTRIES:
+ case EBT_SO_GET_INIT_ENTRIES:
+ ret = copy_everything_to_user(t, user, len, cmd);
+ up(&ebt_mutex);
+ break;
+
+ default:
+ up(&ebt_mutex);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static struct nf_sockopt_ops ebt_sockopts =
+{ { NULL, NULL }, PF_INET, EBT_BASE_CTL, EBT_SO_SET_MAX + 1, do_ebt_set_ctl,
+ EBT_BASE_CTL, EBT_SO_GET_MAX + 1, do_ebt_get_ctl, 0, NULL
+};
+
+static int __init init(void)
+{
+ int ret;
+
+ down(&ebt_mutex);
+ list_named_insert(&ebt_targets, &ebt_standard_target);
+ up(&ebt_mutex);
+ if ((ret = nf_register_sockopt(&ebt_sockopts)) < 0)
+ return ret;
+
+ printk(KERN_NOTICE "Ebtables v2.0 registered\n");
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ nf_unregister_sockopt(&ebt_sockopts);
+ printk(KERN_NOTICE "Ebtables v2.0 unregistered\n");
+}
+
+EXPORT_SYMBOL(ebt_register_table);
+EXPORT_SYMBOL(ebt_unregister_table);
+EXPORT_SYMBOL(ebt_register_match);
+EXPORT_SYMBOL(ebt_unregister_match);
+EXPORT_SYMBOL(ebt_register_watcher);
+EXPORT_SYMBOL(ebt_unregister_watcher);
+EXPORT_SYMBOL(ebt_register_target);
+EXPORT_SYMBOL(ebt_unregister_target);
+EXPORT_SYMBOL(ebt_do_table);
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/core/dev.c linux-ebtables/net/core/dev.c
--- linux-mips-cvs/net/core/dev.c 2004-04-16 05:14:21.000000000 +0200
+++ linux-ebtables/net/core/dev.c 2005-02-07 05:52:50.000000000 +0100
@@ -1426,7 +1426,7 @@
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
-void (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
+int (*br_handle_frame_hook)(struct sk_buff *skb) = NULL;
#endif
static __inline__ int handle_bridge(struct sk_buff *skb,
@@ -1443,7 +1443,6 @@
}
}
- br_handle_frame_hook(skb);
return ret;
}
@@ -1503,7 +1502,12 @@
#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
if (skb->dev->br_port != NULL && br_handle_frame_hook != NULL &&
skb->pkt_type != PACKET_LOOPBACK) {
- return handle_bridge(skb, pt_prev);
+ int ret;
+
+ ret = handle_bridge(skb, pt_prev);
+ if (br_handle_frame_hook(skb) == 0)
+ return ret;
+ pt_prev = NULL;
}
#endif
diff -Nur linux-mips-cvs/net/core/netfilter.c linux-ebtables/net/core/netfilter.c
--- linux-mips-cvs/net/core/netfilter.c 2005-01-20 03:19:25.000000000 +0100
+++ linux-ebtables/net/core/netfilter.c 2005-02-07 05:52:50.000000000 +0100
@@ -342,10 +342,15 @@
const struct net_device *indev,
const struct net_device *outdev,
struct list_head **i,
- int (*okfn)(struct sk_buff *))
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh)
{
for (*i = (*i)->next; *i != head; *i = (*i)->next) {
struct nf_hook_ops *elem = (struct nf_hook_ops *)*i;
+
+ if (hook_thresh > elem->priority)
+ continue;
+
switch (elem->hook(hook, skb, indev, outdev, okfn)) {
case NF_QUEUE:
return NF_QUEUE;
@@ -413,6 +418,10 @@
{
int status;
struct nf_info *info;
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ struct net_device *physindev = NULL;
+ struct net_device *physoutdev = NULL;
+#endif
if (!queue_handler[pf].outfn) {
kfree_skb(skb);
@@ -435,11 +444,24 @@
if (indev) dev_hold(indev);
if (outdev) dev_hold(outdev);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if (skb->nf_bridge) {
+ physindev = skb->nf_bridge->physindev;
+ if (physindev) dev_hold(physindev);
+ physoutdev = skb->nf_bridge->physoutdev;
+ if (physoutdev) dev_hold(physoutdev);
+ }
+#endif
+
status = queue_handler[pf].outfn(skb, info, queue_handler[pf].data);
if (status < 0) {
/* James M doesn't say fuck enough. */
if (indev) dev_put(indev);
if (outdev) dev_put(outdev);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if (physindev) dev_put(physindev);
+ if (physoutdev) dev_put(physoutdev);
+#endif
kfree(info);
kfree_skb(skb);
return;
@@ -449,7 +471,8 @@
int nf_hook_slow(int pf, unsigned int hook, struct sk_buff *skb,
struct net_device *indev,
struct net_device *outdev,
- int (*okfn)(struct sk_buff *))
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh)
{
struct list_head *elem;
unsigned int verdict;
@@ -481,7 +504,7 @@
elem = &nf_hooks[pf][hook];
verdict = nf_iterate(&nf_hooks[pf][hook], &skb, hook, indev,
- outdev, &elem, okfn);
+ outdev, &elem, okfn, hook_thresh);
if (verdict == NF_QUEUE) {
NFDEBUG("nf_hook: Verdict = QUEUE.\n");
nf_queue(skb, elem, pf, hook, indev, outdev, okfn);
@@ -510,6 +533,14 @@
/* We don't have BR_NETPROTO_LOCK here */
br_read_lock_bh(BR_NETPROTO_LOCK);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if (skb->nf_bridge) {
+ if (skb->nf_bridge->physindev)
+ dev_put(skb->nf_bridge->physindev);
+ if (skb->nf_bridge->physoutdev)
+ dev_put(skb->nf_bridge->physoutdev);
+ }
+#endif
for (i = nf_hooks[info->pf][info->hook].next; i != elem; i = i->next) {
if (i == &nf_hooks[info->pf][info->hook]) {
/* The module which sent it to userspace is gone. */
@@ -530,7 +561,7 @@
verdict = nf_iterate(&nf_hooks[info->pf][info->hook],
&skb, info->hook,
info->indev, info->outdev, &elem,
- info->okfn);
+ info->okfn, INT_MIN);
}
switch (verdict) {
diff -Nur linux-mips-cvs/net/core/skbuff.c linux-ebtables/net/core/skbuff.c
--- linux-mips-cvs/net/core/skbuff.c 2003-08-13 19:19:30.000000000 +0200
+++ linux-ebtables/net/core/skbuff.c 2005-02-07 05:52:50.000000000 +0100
@@ -246,6 +246,9 @@
#ifdef CONFIG_NETFILTER_DEBUG
skb->nf_debug = 0;
#endif
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ skb->nf_bridge = NULL;
+#endif
#endif
#ifdef CONFIG_NET_SCHED
skb->tc_index = 0;
@@ -326,6 +329,9 @@
}
#ifdef CONFIG_NETFILTER
nf_conntrack_put(skb->nfct);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ nf_bridge_put(skb->nf_bridge);
+#endif
#endif
skb_headerinit(skb, NULL, 0); /* clean state */
kfree_skbmem(skb);
@@ -393,6 +399,9 @@
#ifdef CONFIG_NETFILTER_DEBUG
C(nf_debug);
#endif
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ C(nf_bridge);
+#endif
#endif /*CONFIG_NETFILTER*/
#if defined(CONFIG_HIPPI)
C(private);
@@ -405,6 +414,9 @@
skb->cloned = 1;
#ifdef CONFIG_NETFILTER
nf_conntrack_get(skb->nfct);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ nf_bridge_get(skb->nf_bridge);
+#endif
#endif
return n;
}
@@ -440,6 +452,10 @@
#ifdef CONFIG_NETFILTER_DEBUG
new->nf_debug=old->nf_debug;
#endif
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ new->nf_bridge=old->nf_bridge;
+ nf_bridge_get(new->nf_bridge);
+#endif
#endif
#ifdef CONFIG_NET_SCHED
new->tc_index = old->tc_index;
@@ -726,9 +742,9 @@
/* Set the tail pointer and length */
skb_put(n,skb->len);
- /* Copy the data only. */
- if (skb_copy_bits(skb, 0, n->data, skb->len))
- BUG();
+ /* Copy the linear data and header. */
+ if (skb_copy_bits(skb, -newheadroom, n->head, newheadroom + skb->len))
+ BUG();
copy_skb_header(n, skb);
return n;
diff -Nur linux-mips-cvs/net/ipv4/ip_output.c linux-ebtables/net/ipv4/ip_output.c
--- linux-mips-cvs/net/ipv4/ip_output.c 2005-01-20 03:19:25.000000000 +0100
+++ linux-ebtables/net/ipv4/ip_output.c 2005-02-07 05:52:50.000000000 +0100
@@ -890,6 +890,10 @@
/* Connection association is same as pre-frag packet */
skb2->nfct = skb->nfct;
nf_conntrack_get(skb2->nfct);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ skb2->nf_bridge = skb->nf_bridge;
+ nf_bridge_get(skb2->nf_bridge);
+#endif
#ifdef CONFIG_NETFILTER_DEBUG
skb2->nf_debug = skb->nf_debug;
#endif
diff -Nur linux-mips-cvs/net/ipv4/ip_output.c.orig linux-ebtables/net/ipv4/ip_output.c.orig
--- linux-mips-cvs/net/ipv4/ip_output.c.orig 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/ipv4/ip_output.c.orig 2005-01-20 03:19:25.000000000 +0100
@@ -0,0 +1,1036 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * The Internet Protocol (IP) output module.
+ *
+ * Version: $Id$
+ *
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Donald Becker, <becker@super.org>
+ * Alan Cox, <Alan.Cox@linux.org>
+ * Richard Underwood
+ * Stefan Becker, <stefanb@yello.ping.de>
+ * Jorge Cwik, <jorge@laser.satlink.net>
+ * Arnt Gulbrandsen, <agulbra@nvg.unit.no>
+ *
+ * See ip_input.c for original log
+ *
+ * Fixes:
+ * Alan Cox : Missing nonblock feature in ip_build_xmit.
+ * Mike Kilburn : htons() missing in ip_build_xmit.
+ * Bradford Johnson: Fix faulty handling of some frames when
+ * no route is found.
+ * Alexander Demenshin: Missing sk/skb free in ip_queue_xmit
+ * (in case if packet not accepted by
+ * output firewall rules)
+ * Mike McLagan : Routing by source
+ * Alexey Kuznetsov: use new route cache
+ * Andi Kleen: Fix broken PMTU recovery and remove
+ * some redundant tests.
+ * Vitaly E. Lavrov : Transparent proxy revived after year coma.
+ * Andi Kleen : Replace ip_reply with ip_send_reply.
+ * Andi Kleen : Split fast and slow ip_build_xmit path
+ * for decreased register pressure on x86
+ * and more readibility.
+ * Marc Boucher : When call_out_firewall returns FW_QUEUE,
+ * silently drop skb instead of failing with -EPERM.
+ * Detlev Wengorz : Copy protocol for fragments.
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/config.h>
+
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+
+#include <net/snmp.h>
+#include <net/ip.h>
+#include <net/protocol.h>
+#include <net/route.h>
+#include <net/tcp.h>
+#include <net/udp.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/arp.h>
+#include <net/icmp.h>
+#include <net/raw.h>
+#include <net/checksum.h>
+#include <net/inetpeer.h>
+#include <linux/igmp.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/mroute.h>
+#include <linux/netlink.h>
+
+/*
+ * Shall we try to damage output packets if routing dev changes?
+ */
+
+int sysctl_ip_dynaddr = 0;
+int sysctl_ip_default_ttl = IPDEFTTL;
+
+/* Generate a checksum for an outgoing IP datagram. */
+__inline__ void ip_send_check(struct iphdr *iph)
+{
+ iph->check = 0;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+}
+
+/* dev_loopback_xmit for use with netfilter. */
+static int ip_dev_loopback_xmit(struct sk_buff *newskb)
+{
+ newskb->mac.raw = newskb->data;
+ __skb_pull(newskb, newskb->nh.raw - newskb->data);
+ newskb->pkt_type = PACKET_LOOPBACK;
+ newskb->ip_summed = CHECKSUM_UNNECESSARY;
+ BUG_TRAP(newskb->dst);
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ nf_debug_ip_loopback_xmit(newskb);
+#endif
+ netif_rx(newskb);
+ return 0;
+}
+
+/* Don't just hand NF_HOOK skb->dst->output, in case netfilter hook
+ changes route */
+static inline int
+output_maybe_reroute(struct sk_buff *skb)
+{
+ return skb->dst->output(skb);
+}
+
+/*
+ * Add an ip header to a skbuff and send it out.
+ */
+int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
+ u32 saddr, u32 daddr, struct ip_options *opt)
+{
+ struct rtable *rt = (struct rtable *)skb->dst;
+ struct iphdr *iph;
+
+ /* Build the IP header. */
+ if (opt)
+ iph=(struct iphdr *)skb_push(skb,sizeof(struct iphdr) + opt->optlen);
+ else
+ iph=(struct iphdr *)skb_push(skb,sizeof(struct iphdr));
+
+ iph->version = 4;
+ iph->ihl = 5;
+ iph->tos = sk->protinfo.af_inet.tos;
+ if (ip_dont_fragment(sk, &rt->u.dst))
+ iph->frag_off = htons(IP_DF);
+ else
+ iph->frag_off = 0;
+ iph->ttl = sk->protinfo.af_inet.ttl;
+ iph->daddr = rt->rt_dst;
+ iph->saddr = rt->rt_src;
+ iph->protocol = sk->protocol;
+ iph->tot_len = htons(skb->len);
+ ip_select_ident(iph, &rt->u.dst, sk);
+ skb->nh.iph = iph;
+
+ if (opt && opt->optlen) {
+ iph->ihl += opt->optlen>>2;
+ ip_options_build(skb, opt, daddr, rt, 0);
+ }
+ ip_send_check(iph);
+
+ /* Send it out. */
+ return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
+ output_maybe_reroute);
+}
+
+static inline int ip_finish_output2(struct sk_buff *skb)
+{
+ struct dst_entry *dst = skb->dst;
+ struct hh_cache *hh = dst->hh;
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ nf_debug_ip_finish_output2(skb);
+#endif /*CONFIG_NETFILTER_DEBUG*/
+
+ if (hh) {
+ int hh_alen;
+
+ read_lock_bh(&hh->hh_lock);
+ hh_alen = HH_DATA_ALIGN(hh->hh_len);
+ memcpy(skb->data - hh_alen, hh->hh_data, hh_alen);
+ read_unlock_bh(&hh->hh_lock);
+ skb_push(skb, hh->hh_len);
+ return hh->hh_output(skb);
+ } else if (dst->neighbour)
+ return dst->neighbour->output(skb);
+
+ if (net_ratelimit())
+ printk(KERN_DEBUG "ip_finish_output2: No header cache and no neighbour!\n");
+ kfree_skb(skb);
+ return -EINVAL;
+}
+
+static __inline__ int __ip_finish_output(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dst->dev;
+
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_IP);
+
+ return NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, dev,
+ ip_finish_output2);
+}
+
+int ip_finish_output(struct sk_buff *skb)
+{
+ return __ip_finish_output(skb);
+}
+
+int ip_mc_output(struct sk_buff *skb)
+{
+ struct sock *sk = skb->sk;
+ struct rtable *rt = (struct rtable*)skb->dst;
+ struct net_device *dev = rt->u.dst.dev;
+
+ /*
+ * If the indicated interface is up and running, send the packet.
+ */
+ IP_INC_STATS(IpOutRequests);
+#ifdef CONFIG_IP_ROUTE_NAT
+ if (rt->rt_flags & RTCF_NAT)
+ ip_do_nat(skb);
+#endif
+
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_IP);
+
+ /*
+ * Multicasts are looped back for other local users
+ */
+
+ if (rt->rt_flags&RTCF_MULTICAST) {
+ if ((!sk || sk->protinfo.af_inet.mc_loop)
+#ifdef CONFIG_IP_MROUTE
+ /* Small optimization: do not loopback not local frames,
+ which returned after forwarding; they will be dropped
+ by ip_mr_input in any case.
+ Note, that local frames are looped back to be delivered
+ to local recipients.
+
+ This check is duplicated in ip_mr_input at the moment.
+ */
+ && ((rt->rt_flags&RTCF_LOCAL) || !(IPCB(skb)->flags&IPSKB_FORWARDED))
+#endif
+ ) {
+ struct sk_buff *newskb = skb_clone(skb, GFP_ATOMIC);
+ if (newskb)
+ NF_HOOK(PF_INET, NF_IP_POST_ROUTING, newskb, NULL,
+ newskb->dev,
+ ip_dev_loopback_xmit);
+ }
+
+ /* Multicasts with ttl 0 must not go beyond the host */
+
+ if (skb->nh.iph->ttl == 0) {
+ kfree_skb(skb);
+ return 0;
+ }
+ }
+
+ if (rt->rt_flags&RTCF_BROADCAST) {
+ struct sk_buff *newskb = skb_clone(skb, GFP_ATOMIC);
+ if (newskb)
+ NF_HOOK(PF_INET, NF_IP_POST_ROUTING, newskb, NULL,
+ newskb->dev, ip_dev_loopback_xmit);
+ }
+
+ return __ip_finish_output(skb);
+}
+
+int ip_output(struct sk_buff *skb)
+{
+#ifdef CONFIG_IP_ROUTE_NAT
+ struct rtable *rt = (struct rtable*)skb->dst;
+#endif
+
+ IP_INC_STATS(IpOutRequests);
+
+#ifdef CONFIG_IP_ROUTE_NAT
+ if (rt->rt_flags&RTCF_NAT)
+ ip_do_nat(skb);
+#endif
+
+ return __ip_finish_output(skb);
+}
+
+/* Queues a packet to be sent, and starts the transmitter if necessary.
+ * This routine also needs to put in the total length and compute the
+ * checksum. We use to do this in two stages, ip_build_header() then
+ * this, but that scheme created a mess when routes disappeared etc.
+ * So we do it all here, and the TCP send engine has been changed to
+ * match. (No more unroutable FIN disasters, etc. wheee...) This will
+ * most likely make other reliable transport layers above IP easier
+ * to implement under Linux.
+ */
+static inline int ip_queue_xmit2(struct sk_buff *skb)
+{
+ struct sock *sk = skb->sk;
+ struct rtable *rt = (struct rtable *)skb->dst;
+ struct net_device *dev;
+ struct iphdr *iph = skb->nh.iph;
+
+ dev = rt->u.dst.dev;
+
+ /* This can happen when the transport layer has segments queued
+ * with a cached route, and by the time we get here things are
+ * re-routed to a device with a different MTU than the original
+ * device. Sick, but we must cover it.
+ */
+ if (skb_headroom(skb) < dev->hard_header_len && dev->hard_header) {
+ struct sk_buff *skb2;
+
+ skb2 = skb_realloc_headroom(skb, (dev->hard_header_len + 15) & ~15);
+ kfree_skb(skb);
+ if (skb2 == NULL)
+ return -ENOMEM;
+ if (sk)
+ skb_set_owner_w(skb2, sk);
+ skb = skb2;
+ iph = skb->nh.iph;
+ }
+
+ if (skb->len > rt->u.dst.pmtu)
+ goto fragment;
+
+ ip_select_ident(iph, &rt->u.dst, sk);
+
+ /* Add an IP checksum. */
+ ip_send_check(iph);
+
+ skb->priority = sk->priority;
+ return skb->dst->output(skb);
+
+fragment:
+ if (ip_dont_fragment(sk, &rt->u.dst)) {
+ /* Reject packet ONLY if TCP might fragment
+ * it itself, if were careful enough.
+ */
+ NETDEBUG(printk(KERN_DEBUG "sending pkt_too_big (len[%u] pmtu[%u]) to self\n",
+ skb->len, rt->u.dst.pmtu));
+
+ icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
+ htonl(rt->u.dst.pmtu));
+ kfree_skb(skb);
+ return -EMSGSIZE;
+ }
+ ip_select_ident(iph, &rt->u.dst, sk);
+ if (skb->ip_summed == CHECKSUM_HW &&
+ (skb = skb_checksum_help(skb)) == NULL)
+ return -ENOMEM;
+ return ip_fragment(skb, skb->dst->output);
+}
+
+int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
+{
+ struct sock *sk = skb->sk;
+ struct ip_options *opt = sk->protinfo.af_inet.opt;
+ struct rtable *rt;
+ struct iphdr *iph;
+
+ /* Skip all of this if the packet is already routed,
+ * f.e. by something like SCTP.
+ */
+ rt = (struct rtable *) skb->dst;
+ if (rt != NULL)
+ goto packet_routed;
+
+ /* Make sure we can route this packet. */
+ rt = (struct rtable *)__sk_dst_check(sk, 0);
+ if (rt == NULL) {
+ u32 daddr;
+
+ /* Use correct destination address if we have options. */
+ daddr = sk->daddr;
+ if(opt && opt->srr)
+ daddr = opt->faddr;
+
+ /* If this fails, retransmit mechanism of transport layer will
+ * keep trying until route appears or the connection times itself
+ * out.
+ */
+ if (ip_route_output(&rt, daddr, sk->saddr,
+ RT_CONN_FLAGS(sk),
+ sk->bound_dev_if))
+ goto no_route;
+ __sk_dst_set(sk, &rt->u.dst);
+ sk->route_caps = rt->u.dst.dev->features;
+ }
+ skb->dst = dst_clone(&rt->u.dst);
+
+packet_routed:
+ if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
+ goto no_route;
+
+ /* OK, we know where to send it, allocate and build IP header. */
+ iph = (struct iphdr *) skb_push(skb, sizeof(struct iphdr) + (opt ? opt->optlen : 0));
+ *((__u16 *)iph) = htons((4 << 12) | (5 << 8) | (sk->protinfo.af_inet.tos & 0xff));
+ iph->tot_len = htons(skb->len);
+ if (ip_dont_fragment(sk, &rt->u.dst) && !ipfragok)
+ iph->frag_off = htons(IP_DF);
+ else
+ iph->frag_off = 0;
+ iph->ttl = sk->protinfo.af_inet.ttl;
+ iph->protocol = sk->protocol;
+ iph->saddr = rt->rt_src;
+ iph->daddr = rt->rt_dst;
+ skb->nh.iph = iph;
+ /* Transport layer set skb->h.foo itself. */
+
+ if(opt && opt->optlen) {
+ iph->ihl += opt->optlen >> 2;
+ ip_options_build(skb, opt, sk->daddr, rt, 0);
+ }
+
+ return NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
+ ip_queue_xmit2);
+
+no_route:
+ IP_INC_STATS(IpOutNoRoutes);
+ kfree_skb(skb);
+ return -EHOSTUNREACH;
+}
+
+/*
+ * Build and send a packet, with as little as one copy
+ *
+ * Doesn't care much about ip options... option length can be
+ * different for fragment at 0 and other fragments.
+ *
+ * Note that the fragment at the highest offset is sent first,
+ * so the getfrag routine can fill in the TCP/UDP checksum header
+ * field in the last fragment it sends... actually it also helps
+ * the reassemblers, they can put most packets in at the head of
+ * the fragment queue, and they know the total size in advance. This
+ * last feature will measurably improve the Linux fragment handler one
+ * day.
+ *
+ * The callback has five args, an arbitrary pointer (copy of frag),
+ * the source IP address (may depend on the routing table), the
+ * destination address (char *), the offset to copy from, and the
+ * length to be copied.
+ */
+
+static int ip_build_xmit_slow(struct sock *sk,
+ int getfrag (const void *,
+ char *,
+ unsigned int,
+ unsigned int,
+ struct sk_buff *),
+ const void *frag,
+ unsigned length,
+ struct ipcm_cookie *ipc,
+ struct rtable *rt,
+ int flags)
+{
+ unsigned int fraglen, maxfraglen, fragheaderlen;
+ int err;
+ int offset, mf;
+ int mtu;
+ u16 id;
+
+ int hh_len = (rt->u.dst.dev->hard_header_len + 15)&~15;
+ int nfrags=0;
+ struct ip_options *opt = ipc->opt;
+ int df = 0;
+
+ mtu = rt->u.dst.pmtu;
+ if (ip_dont_fragment(sk, &rt->u.dst))
+ df = htons(IP_DF);
+
+ length -= sizeof(struct iphdr);
+
+ if (opt) {
+ fragheaderlen = sizeof(struct iphdr) + opt->optlen;
+ maxfraglen = ((mtu-sizeof(struct iphdr)-opt->optlen) & ~7) + fragheaderlen;
+ } else {
+ fragheaderlen = sizeof(struct iphdr);
+
+ /*
+ * Fragheaderlen is the size of 'overhead' on each buffer. Now work
+ * out the size of the frames to send.
+ */
+
+ maxfraglen = ((mtu-sizeof(struct iphdr)) & ~7) + fragheaderlen;
+ }
+
+ if (length + fragheaderlen > 0xFFFF) {
+ ip_local_error(sk, EMSGSIZE, rt->rt_dst, sk->dport, mtu);
+ return -EMSGSIZE;
+ }
+
+ /*
+ * Start at the end of the frame by handling the remainder.
+ */
+
+ offset = length - (length % (maxfraglen - fragheaderlen));
+
+ /*
+ * Amount of memory to allocate for final fragment.
+ */
+
+ fraglen = length - offset + fragheaderlen;
+
+ if (length-offset==0) {
+ fraglen = maxfraglen;
+ offset -= maxfraglen-fragheaderlen;
+ }
+
+ /*
+ * The last fragment will not have MF (more fragments) set.
+ */
+
+ mf = 0;
+
+ /*
+ * Don't fragment packets for path mtu discovery.
+ */
+
+ if (offset > 0 && sk->protinfo.af_inet.pmtudisc==IP_PMTUDISC_DO) {
+ ip_local_error(sk, EMSGSIZE, rt->rt_dst, sk->dport, mtu);
+ return -EMSGSIZE;
+ }
+ if (flags&MSG_PROBE)
+ goto out;
+
+ /*
+ * Begin outputting the bytes.
+ */
+
+ id = sk->protinfo.af_inet.id++;
+
+ do {
+ char *data;
+ struct sk_buff * skb;
+
+ /*
+ * Get the memory we require with some space left for alignment.
+ */
+ if (!(flags & MSG_DONTWAIT) || nfrags == 0) {
+ skb = sock_alloc_send_skb(sk, fraglen + hh_len + 15,
+ (flags & MSG_DONTWAIT), &err);
+ } else {
+ /* On a non-blocking write, we check for send buffer
+ * usage on the first fragment only.
+ */
+ skb = sock_wmalloc(sk, fraglen + hh_len + 15, 1,
+ sk->allocation);
+ if (!skb)
+ err = -ENOBUFS;
+ }
+ if (skb == NULL)
+ goto error;
+
+ /*
+ * Fill in the control structures
+ */
+
+ skb->priority = sk->priority;
+ skb->dst = dst_clone(&rt->u.dst);
+ skb_reserve(skb, hh_len);
+
+ /*
+ * Find where to start putting bytes.
+ */
+
+ data = skb_put(skb, fraglen);
+ skb->nh.iph = (struct iphdr *)data;
+
+ /*
+ * Only write IP header onto non-raw packets
+ */
+
+ {
+ struct iphdr *iph = (struct iphdr *)data;
+
+ iph->version = 4;
+ iph->ihl = 5;
+ if (opt) {
+ iph->ihl += opt->optlen>>2;
+ ip_options_build(skb, opt,
+ ipc->addr, rt, offset);
+ }
+ iph->tos = sk->protinfo.af_inet.tos;
+ iph->tot_len = htons(fraglen - fragheaderlen + iph->ihl*4);
+ iph->frag_off = htons(offset>>3)|mf|df;
+ iph->id = id;
+ if (!mf) {
+ if (offset || !df) {
+ /* Select an unpredictable ident only
+ * for packets without DF or having
+ * been fragmented.
+ */
+ __ip_select_ident(iph, &rt->u.dst);
+ id = iph->id;
+ }
+
+ /*
+ * Any further fragments will have MF set.
+ */
+ mf = htons(IP_MF);
+ }
+ if (rt->rt_type == RTN_MULTICAST)
+ iph->ttl = sk->protinfo.af_inet.mc_ttl;
+ else
+ iph->ttl = sk->protinfo.af_inet.ttl;
+ iph->protocol = sk->protocol;
+ iph->check = 0;
+ iph->saddr = rt->rt_src;
+ iph->daddr = rt->rt_dst;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+ data += iph->ihl*4;
+ }
+
+ /*
+ * User data callback
+ */
+
+ if (getfrag(frag, data, offset, fraglen-fragheaderlen, skb)) {
+ err = -EFAULT;
+ kfree_skb(skb);
+ goto error;
+ }
+
+ offset -= (maxfraglen-fragheaderlen);
+ fraglen = maxfraglen;
+
+ nfrags++;
+
+ err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL,
+ skb->dst->dev, output_maybe_reroute);
+ if (err) {
+ if (err > 0)
+ err = sk->protinfo.af_inet.recverr ? net_xmit_errno(err) : 0;
+ if (err)
+ goto error;
+ }
+ } while (offset >= 0);
+
+ if (nfrags>1)
+ ip_statistics[smp_processor_id()*2 + !in_softirq()].IpFragCreates += nfrags;
+out:
+ return 0;
+
+error:
+ IP_INC_STATS(IpOutDiscards);
+ if (nfrags>1)
+ ip_statistics[smp_processor_id()*2 + !in_softirq()].IpFragCreates += nfrags;
+ return err;
+}
+
+/*
+ * Fast path for unfragmented packets.
+ */
+int ip_build_xmit(struct sock *sk,
+ int getfrag (const void *,
+ char *,
+ unsigned int,
+ unsigned int,
+ struct sk_buff *),
+ const void *frag,
+ unsigned length,
+ struct ipcm_cookie *ipc,
+ struct rtable *rt,
+ int flags)
+{
+ int err;
+ struct sk_buff *skb;
+ int df;
+ struct iphdr *iph;
+
+ /*
+ * Try the simple case first. This leaves fragmented frames, and by
+ * choice RAW frames within 20 bytes of maximum size(rare) to the long path
+ */
+
+ if (!sk->protinfo.af_inet.hdrincl) {
+ length += sizeof(struct iphdr);
+
+ /*
+ * Check for slow path.
+ */
+ if (length > rt->u.dst.pmtu || ipc->opt != NULL)
+ return ip_build_xmit_slow(sk,getfrag,frag,length,ipc,rt,flags);
+ } else {
+ if (length > rt->u.dst.dev->mtu) {
+ ip_local_error(sk, EMSGSIZE, rt->rt_dst, sk->dport, rt->u.dst.dev->mtu);
+ return -EMSGSIZE;
+ }
+ }
+ if (flags&MSG_PROBE)
+ goto out;
+
+ /*
+ * Do path mtu discovery if needed.
+ */
+ df = 0;
+ if (ip_dont_fragment(sk, &rt->u.dst))
+ df = htons(IP_DF);
+
+ /*
+ * Fast path for unfragmented frames without options.
+ */
+ {
+ int hh_len = (rt->u.dst.dev->hard_header_len + 15)&~15;
+
+ skb = sock_alloc_send_skb(sk, length+hh_len+15,
+ flags&MSG_DONTWAIT, &err);
+ if(skb==NULL)
+ goto error;
+ skb_reserve(skb, hh_len);
+ }
+
+ skb->priority = sk->priority;
+ skb->dst = dst_clone(&rt->u.dst);
+
+ skb->nh.iph = iph = (struct iphdr *)skb_put(skb, length);
+
+ if(!sk->protinfo.af_inet.hdrincl) {
+ iph->version=4;
+ iph->ihl=5;
+ iph->tos=sk->protinfo.af_inet.tos;
+ iph->tot_len = htons(length);
+ iph->frag_off = df;
+ iph->ttl=sk->protinfo.af_inet.mc_ttl;
+ ip_select_ident(iph, &rt->u.dst, sk);
+ if (rt->rt_type != RTN_MULTICAST)
+ iph->ttl=sk->protinfo.af_inet.ttl;
+ iph->protocol=sk->protocol;
+ iph->saddr=rt->rt_src;
+ iph->daddr=rt->rt_dst;
+ iph->check=0;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+ err = getfrag(frag, ((char *)iph)+iph->ihl*4,0, length-iph->ihl*4, skb);
+ }
+ else
+ err = getfrag(frag, (void *)iph, 0, length, skb);
+
+ if (err)
+ goto error_fault;
+
+ err = NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
+ output_maybe_reroute);
+ if (err > 0)
+ err = sk->protinfo.af_inet.recverr ? net_xmit_errno(err) : 0;
+ if (err)
+ goto error;
+out:
+ return 0;
+
+error_fault:
+ err = -EFAULT;
+ kfree_skb(skb);
+error:
+ IP_INC_STATS(IpOutDiscards);
+ return err;
+}
+
+/*
+ * This IP datagram is too large to be sent in one piece. Break it up into
+ * smaller pieces (each of size equal to IP header plus
+ * a block of the data of the original IP data part) that will yet fit in a
+ * single device frame, and queue such a frame for sending.
+ *
+ * Yes this is inefficient, feel free to submit a quicker one.
+ */
+
+int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
+{
+ struct iphdr *iph;
+ int raw = 0;
+ int ptr;
+ struct net_device *dev;
+ struct sk_buff *skb2;
+ unsigned int mtu, hlen, left, len;
+ int offset;
+ int not_last_frag;
+ struct rtable *rt = (struct rtable*)skb->dst;
+ int err = 0;
+
+ dev = rt->u.dst.dev;
+
+ /*
+ * Point into the IP datagram header.
+ */
+
+ iph = skb->nh.iph;
+
+ /*
+ * Setup starting values.
+ */
+
+ hlen = iph->ihl * 4;
+ left = skb->len - hlen; /* Space per frame */
+ mtu = rt->u.dst.pmtu - hlen; /* Size of data space */
+ ptr = raw + hlen; /* Where to start from */
+
+ /*
+ * Fragment the datagram.
+ */
+
+ offset = (ntohs(iph->frag_off) & IP_OFFSET) << 3;
+ not_last_frag = iph->frag_off & htons(IP_MF);
+
+ /*
+ * Keep copying data until we run out.
+ */
+
+ while(left > 0) {
+ len = left;
+ /* IF: it doesn't fit, use 'mtu' - the data space left */
+ if (len > mtu)
+ len = mtu;
+ /* IF: we are not sending upto and including the packet end
+ then align the next start on an eight byte boundary */
+ if (len < left) {
+ len &= ~7;
+ }
+ /*
+ * Allocate buffer.
+ */
+
+ if ((skb2 = alloc_skb(len+hlen+dev->hard_header_len+15,GFP_ATOMIC)) == NULL) {
+ NETDEBUG(printk(KERN_INFO "IP: frag: no memory for new fragment!\n"));
+ err = -ENOMEM;
+ goto fail;
+ }
+
+ /*
+ * Set up data on packet
+ */
+
+ skb2->pkt_type = skb->pkt_type;
+ skb2->priority = skb->priority;
+ skb_reserve(skb2, (dev->hard_header_len+15)&~15);
+ skb_put(skb2, len + hlen);
+ skb2->nh.raw = skb2->data;
+ skb2->h.raw = skb2->data + hlen;
+ skb2->protocol = skb->protocol;
+ skb2->security = skb->security;
+
+ /*
+ * Charge the memory for the fragment to any owner
+ * it might possess
+ */
+
+ if (skb->sk)
+ skb_set_owner_w(skb2, skb->sk);
+ skb2->dst = dst_clone(skb->dst);
+ skb2->dev = skb->dev;
+
+ /*
+ * Copy the packet header into the new buffer.
+ */
+
+ memcpy(skb2->nh.raw, skb->data, hlen);
+
+ /*
+ * Copy a block of the IP datagram.
+ */
+ if (skb_copy_bits(skb, ptr, skb2->h.raw, len))
+ BUG();
+ left -= len;
+
+ /*
+ * Fill in the new header fields.
+ */
+ iph = skb2->nh.iph;
+ iph->frag_off = htons((offset >> 3));
+
+ /* ANK: dirty, but effective trick. Upgrade options only if
+ * the segment to be fragmented was THE FIRST (otherwise,
+ * options are already fixed) and make it ONCE
+ * on the initial skb, so that all the following fragments
+ * will inherit fixed options.
+ */
+ if (offset == 0)
+ ip_options_fragment(skb);
+
+ /* Copy the flags to each fragment. */
+ IPCB(skb2)->flags = IPCB(skb)->flags;
+
+ /*
+ * Added AC : If we are fragmenting a fragment that's not the
+ * last fragment then keep MF on each bit
+ */
+ if (left > 0 || not_last_frag)
+ iph->frag_off |= htons(IP_MF);
+ ptr += len;
+ offset += len;
+
+#ifdef CONFIG_NET_SCHED
+ skb2->tc_index = skb->tc_index;
+#endif
+#ifdef CONFIG_NETFILTER
+ skb2->nfmark = skb->nfmark;
+ skb2->nfcache = skb->nfcache;
+ /* Connection association is same as pre-frag packet */
+ skb2->nfct = skb->nfct;
+ nf_conntrack_get(skb2->nfct);
+#ifdef CONFIG_NETFILTER_DEBUG
+ skb2->nf_debug = skb->nf_debug;
+#endif
+#endif
+
+ /*
+ * Put this fragment into the sending queue.
+ */
+
+ IP_INC_STATS(IpFragCreates);
+
+ iph->tot_len = htons(len + hlen);
+
+ ip_send_check(iph);
+
+ err = output(skb2);
+ if (err)
+ goto fail;
+ }
+ kfree_skb(skb);
+ IP_INC_STATS(IpFragOKs);
+ return err;
+
+fail:
+ kfree_skb(skb);
+ IP_INC_STATS(IpFragFails);
+ return err;
+}
+
+/*
+ * Fetch data from kernel space and fill in checksum if needed.
+ */
+static int ip_reply_glue_bits(const void *dptr, char *to, unsigned int offset,
+ unsigned int fraglen, struct sk_buff *skb)
+{
+ struct ip_reply_arg *dp = (struct ip_reply_arg*)dptr;
+ u16 *pktp = (u16 *)to;
+ struct iovec *iov;
+ int len;
+ int hdrflag = 1;
+
+ iov = &dp->iov[0];
+ if (offset >= iov->iov_len) {
+ offset -= iov->iov_len;
+ iov++;
+ hdrflag = 0;
+ }
+ len = iov->iov_len - offset;
+ if (fraglen > len) { /* overlapping. */
+ dp->csum = csum_partial_copy_nocheck(iov->iov_base+offset, to, len,
+ dp->csum);
+ offset = 0;
+ fraglen -= len;
+ to += len;
+ iov++;
+ }
+
+ dp->csum = csum_partial_copy_nocheck(iov->iov_base+offset, to, fraglen,
+ dp->csum);
+
+ if (hdrflag && dp->csumoffset)
+ *(pktp + dp->csumoffset) = csum_fold(dp->csum); /* fill in checksum */
+ return 0;
+}
+
+/*
+ * Generic function to send a packet as reply to another packet.
+ * Used to send TCP resets so far. ICMP should use this function too.
+ *
+ * Should run single threaded per socket because it uses the sock
+ * structure to pass arguments.
+ */
+void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg,
+ unsigned int len)
+{
+ struct {
+ struct ip_options opt;
+ char data[40];
+ } replyopts;
+ struct ipcm_cookie ipc;
+ u32 daddr;
+ struct rtable *rt = (struct rtable*)skb->dst;
+
+ if (ip_options_echo(&replyopts.opt, skb))
+ return;
+
+ daddr = ipc.addr = rt->rt_src;
+ ipc.opt = NULL;
+
+ if (replyopts.opt.optlen) {
+ ipc.opt = &replyopts.opt;
+
+ if (ipc.opt->srr)
+ daddr = replyopts.opt.faddr;
+ }
+
+ if (ip_route_output(&rt, daddr, rt->rt_spec_dst, RT_TOS(skb->nh.iph->tos), 0))
+ return;
+
+ /* And let IP do all the hard work.
+
+ This chunk is not reenterable, hence spinlock.
+ Note that it uses the fact, that this function is called
+ with locally disabled BH and that sk cannot be already spinlocked.
+ */
+ bh_lock_sock(sk);
+ sk->protinfo.af_inet.tos = skb->nh.iph->tos;
+ sk->priority = skb->priority;
+ sk->protocol = skb->nh.iph->protocol;
+ ip_build_xmit(sk, ip_reply_glue_bits, arg, len, &ipc, rt, MSG_DONTWAIT);
+ bh_unlock_sock(sk);
+
+ ip_rt_put(rt);
+}
+
+/*
+ * IP protocol layer initialiser
+ */
+
+static struct packet_type ip_packet_type =
+{
+ __constant_htons(ETH_P_IP),
+ NULL, /* All devices */
+ ip_rcv,
+ (void*)1,
+ NULL,
+};
+
+/*
+ * IP registers the packet type and then calls the subprotocol initialisers
+ */
+
+void __init ip_init(void)
+{
+ dev_add_pack(&ip_packet_type);
+
+ ip_rt_init();
+ inet_initpeers();
+
+#ifdef CONFIG_IP_MULTICAST
+ proc_net_create("igmp", 0, ip_mc_procinfo);
+#endif
+ proc_net_create("mcfilter", 0, ip_mcf_procinfo);
+}
diff -Nur linux-mips-cvs/net/ipv4/netfilter/Config.in linux-ebtables/net/ipv4/netfilter/Config.in
--- linux-mips-cvs/net/ipv4/netfilter/Config.in 2005-01-20 03:19:25.000000000 +0100
+++ linux-ebtables/net/ipv4/netfilter/Config.in 2005-02-07 05:52:50.000000000 +0100
@@ -44,6 +44,9 @@
dep_tristate ' Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES
dep_tristate ' Owner match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_OWNER $CONFIG_IP_NF_IPTABLES
fi
+ if [ "$CONFIG_BRIDGE" != "n" ]; then
+ dep_tristate ' Physdev match support' CONFIG_IP_NF_MATCH_PHYSDEV $CONFIG_IP_NF_IPTABLES
+ fi
# The targets
dep_tristate ' Packet filtering' CONFIG_IP_NF_FILTER $CONFIG_IP_NF_IPTABLES
if [ "$CONFIG_IP_NF_FILTER" != "n" ]; then
diff -Nur linux-mips-cvs/net/ipv4/netfilter/Makefile linux-ebtables/net/ipv4/netfilter/Makefile
--- linux-mips-cvs/net/ipv4/netfilter/Makefile 2003-08-13 19:19:30.000000000 +0200
+++ linux-ebtables/net/ipv4/netfilter/Makefile 2005-02-07 05:52:50.000000000 +0100
@@ -87,6 +87,8 @@
obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
+obj-$(CONFIG_IP_NF_MATCH_PHYSDEV) += ipt_physdev.o
+
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
obj-$(CONFIG_IP_NF_TARGET_MIRROR) += ipt_MIRROR.o
diff -Nur linux-mips-cvs/net/ipv4/netfilter/ip_tables.c linux-ebtables/net/ipv4/netfilter/ip_tables.c
--- linux-mips-cvs/net/ipv4/netfilter/ip_tables.c 2005-01-20 03:19:25.000000000 +0100
+++ linux-ebtables/net/ipv4/netfilter/ip_tables.c 2005-02-07 05:52:50.000000000 +0100
@@ -118,12 +118,19 @@
static inline int
ip_packet_match(const struct iphdr *ip,
const char *indev,
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ const char *physindev,
+#endif
const char *outdev,
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ const char *physoutdev,
+#endif
const struct ipt_ip *ipinfo,
int isfrag)
{
size_t i;
unsigned long ret;
+ unsigned long ret2 = 1;
#define FWINV(bool,invflg) ((bool) ^ !!(ipinfo->invflags & invflg))
@@ -153,7 +160,15 @@
& ((const unsigned long *)ipinfo->iniface_mask)[i];
}
- if (FWINV(ret != 0, IPT_INV_VIA_IN)) {
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ for (i = 0, ret2 = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+ ret2 |= (((const unsigned long *)physindev)[i]
+ ^ ((const unsigned long *)ipinfo->iniface)[i])
+ & ((const unsigned long *)ipinfo->iniface_mask)[i];
+ }
+#endif
+
+ if (FWINV(ret != 0 && ret2 != 0, IPT_INV_VIA_IN)) {
dprintf("VIA in mismatch (%s vs %s).%s\n",
indev, ipinfo->iniface,
ipinfo->invflags&IPT_INV_VIA_IN ?" (INV)":"");
@@ -166,7 +181,15 @@
& ((const unsigned long *)ipinfo->outiface_mask)[i];
}
- if (FWINV(ret != 0, IPT_INV_VIA_OUT)) {
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ for (i = 0, ret2 = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+ ret2 |= (((const unsigned long *)physoutdev)[i]
+ ^ ((const unsigned long *)ipinfo->outiface)[i])
+ & ((const unsigned long *)ipinfo->outiface_mask)[i];
+ }
+#endif
+
+ if (FWINV(ret != 0 && ret2 != 0, IPT_INV_VIA_OUT)) {
dprintf("VIA out mismatch (%s vs %s).%s\n",
outdev, ipinfo->outiface,
ipinfo->invflags&IPT_INV_VIA_OUT ?" (INV)":"");
@@ -265,6 +288,9 @@
/* Initializing verdict to NF_DROP keeps gcc happy. */
unsigned int verdict = NF_DROP;
const char *indev, *outdev;
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ const char *physindev, *physoutdev;
+#endif
void *table_base;
struct ipt_entry *e, *back;
@@ -274,6 +300,13 @@
datalen = (*pskb)->len - ip->ihl * 4;
indev = in ? in->name : nulldevname;
outdev = out ? out->name : nulldevname;
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ physindev = ((*pskb)->nf_bridge && (*pskb)->nf_bridge->physindev) ?
+ (*pskb)->nf_bridge->physindev->name : nulldevname;
+ physoutdev = ((*pskb)->nf_bridge && (*pskb)->nf_bridge->physoutdev) ?
+ (*pskb)->nf_bridge->physoutdev->name : nulldevname;
+#endif
+
/* We handle fragments by dealing with the first fragment as
* if it was a normal packet. All other fragments are treated
* normally, except that they will NEVER match rules that ask
@@ -309,7 +342,15 @@
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
(*pskb)->nfcache |= e->nfcache;
- if (ip_packet_match(ip, indev, outdev, &e->ip, offset)) {
+ if (ip_packet_match(ip, indev,
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ physindev,
+#endif
+ outdev,
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ physoutdev,
+#endif
+ &e->ip, offset)) {
struct ipt_entry_target *t;
if (IPT_MATCH_ITERATE(e, do_match,
diff -Nur linux-mips-cvs/net/ipv4/netfilter/ipt_LOG.c linux-ebtables/net/ipv4/netfilter/ipt_LOG.c
--- linux-mips-cvs/net/ipv4/netfilter/ipt_LOG.c 2003-11-17 02:07:48.000000000 +0100
+++ linux-ebtables/net/ipv4/netfilter/ipt_LOG.c 2005-02-07 05:52:50.000000000 +0100
@@ -316,6 +316,18 @@
loginfo->prefix,
in ? in->name : "",
out ? out->name : "");
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if ((*pskb)->nf_bridge) {
+ struct net_device *physindev = (*pskb)->nf_bridge->physindev;
+ struct net_device *physoutdev = (*pskb)->nf_bridge->physoutdev;
+
+ if (physindev && in != physindev)
+ printk("PHYSIN=%s ", physindev->name);
+ if (physoutdev && out != physoutdev)
+ printk("PHYSOUT=%s ", physoutdev->name);
+ }
+#endif
+
if (in && !out) {
/* MAC logging for input chain only. */
printk("MAC=");
diff -Nur linux-mips-cvs/net/ipv4/netfilter/ipt_REJECT.c linux-ebtables/net/ipv4/netfilter/ipt_REJECT.c
--- linux-mips-cvs/net/ipv4/netfilter/ipt_REJECT.c 2005-01-20 03:19:25.000000000 +0100
+++ linux-ebtables/net/ipv4/netfilter/ipt_REJECT.c 2005-02-07 05:52:50.000000000 +0100
@@ -15,6 +15,9 @@
#include <net/route.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ipt_REJECT.h>
+#ifdef CONFIG_BRIDGE_NETFILTER
+#include <linux/netfilter_bridge.h>
+#endif
#if 0
#define DEBUGP printk
@@ -29,7 +32,13 @@
struct rt_key key = {};
struct rtable *rt;
- if (hook != NF_IP_FORWARD) {
+ /* We don't require ip forwarding to be enabled to be able to
+ * send a RST reply for bridged traffic. */
+ if (hook != NF_IP_FORWARD
+#ifdef CONFIG_BRIDGE_NETFILTER
+ || (skb->nf_bridge && skb->nf_bridge->mask & BRNF_BRIDGED)
+#endif
+ ) {
key.dst = iph->saddr;
if (hook == NF_IP_LOCAL_IN)
key.src = iph->daddr;
diff -Nur linux-mips-cvs/net/ipv4/netfilter/ipt_REJECT.c.orig linux-ebtables/net/ipv4/netfilter/ipt_REJECT.c.orig
--- linux-mips-cvs/net/ipv4/netfilter/ipt_REJECT.c.orig 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/ipv4/netfilter/ipt_REJECT.c.orig 2005-01-20 03:19:25.000000000 +0100
@@ -0,0 +1,426 @@
+/*
+ * This is a module which is used for rejecting packets.
+ * Added support for customized reject packets (Jozsef Kadlecsik).
+ * Added support for ICMP type-3-code-13 (Maciej Soltysiak). [RFC 1812]
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <net/icmp.h>
+#include <net/ip.h>
+#include <net/tcp.h>
+#include <net/route.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_REJECT.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(format, args...)
+#endif
+
+static inline struct rtable *route_reverse(struct sk_buff *skb, int hook)
+{
+ struct iphdr *iph = skb->nh.iph;
+ struct dst_entry *odst;
+ struct rt_key key = {};
+ struct rtable *rt;
+
+ if (hook != NF_IP_FORWARD) {
+ key.dst = iph->saddr;
+ if (hook == NF_IP_LOCAL_IN)
+ key.src = iph->daddr;
+ key.tos = RT_TOS(iph->tos);
+
+ if (ip_route_output_key(&rt, &key) != 0)
+ return NULL;
+ } else {
+ /* non-local src, find valid iif to satisfy
+ * rp-filter when calling ip_route_input. */
+ key.dst = iph->daddr;
+ if (ip_route_output_key(&rt, &key) != 0)
+ return NULL;
+
+ odst = skb->dst;
+ if (ip_route_input(skb, iph->saddr, iph->daddr,
+ RT_TOS(iph->tos), rt->u.dst.dev) != 0) {
+ dst_release(&rt->u.dst);
+ return NULL;
+ }
+ dst_release(&rt->u.dst);
+ rt = (struct rtable *)skb->dst;
+ skb->dst = odst;
+ }
+
+ if (rt->u.dst.error) {
+ dst_release(&rt->u.dst);
+ rt = NULL;
+ }
+
+ return rt;
+}
+
+/* Send RST reply */
+static void send_reset(struct sk_buff *oldskb, int hook)
+{
+ struct sk_buff *nskb;
+ struct tcphdr *otcph, *tcph;
+ struct rtable *rt;
+ unsigned int otcplen;
+ u_int16_t tmp_port;
+ u_int32_t tmp_addr;
+ int needs_ack;
+ int hh_len;
+
+ /* IP header checks: fragment, too short. */
+ if (oldskb->nh.iph->frag_off & htons(IP_OFFSET)
+ || oldskb->len < (oldskb->nh.iph->ihl<<2) + sizeof(struct tcphdr))
+ return;
+
+ otcph = (struct tcphdr *)((u_int32_t*)oldskb->nh.iph + oldskb->nh.iph->ihl);
+ otcplen = oldskb->len - oldskb->nh.iph->ihl*4;
+
+ /* No RST for RST. */
+ if (otcph->rst)
+ return;
+
+ /* Check checksum. */
+ if (tcp_v4_check(otcph, otcplen, oldskb->nh.iph->saddr,
+ oldskb->nh.iph->daddr,
+ csum_partial((char *)otcph, otcplen, 0)) != 0)
+ return;
+
+ if ((rt = route_reverse(oldskb, hook)) == NULL)
+ return;
+
+ hh_len = (rt->u.dst.dev->hard_header_len + 15)&~15;
+
+
+ /* Copy skb (even if skb is about to be dropped, we can't just
+ clone it because there may be other things, such as tcpdump,
+ interested in it). We also need to expand headroom in case
+ hh_len of incoming interface < hh_len of outgoing interface */
+ nskb = skb_copy_expand(oldskb, hh_len, skb_tailroom(oldskb),
+ GFP_ATOMIC);
+ if (!nskb) {
+ dst_release(&rt->u.dst);
+ return;
+ }
+
+ dst_release(nskb->dst);
+ nskb->dst = &rt->u.dst;
+
+ /* This packet will not be the same as the other: clear nf fields */
+ nf_reset(nskb);
+ nskb->nfcache = 0;
+ nskb->nfmark = 0;
+
+ tcph = (struct tcphdr *)((u_int32_t*)nskb->nh.iph + nskb->nh.iph->ihl);
+
+ /* Swap source and dest */
+ tmp_addr = nskb->nh.iph->saddr;
+ nskb->nh.iph->saddr = nskb->nh.iph->daddr;
+ nskb->nh.iph->daddr = tmp_addr;
+ tmp_port = tcph->source;
+ tcph->source = tcph->dest;
+ tcph->dest = tmp_port;
+
+ /* Truncate to length (no data) */
+ tcph->doff = sizeof(struct tcphdr)/4;
+ skb_trim(nskb, nskb->nh.iph->ihl*4 + sizeof(struct tcphdr));
+ nskb->nh.iph->tot_len = htons(nskb->len);
+
+ if (tcph->ack) {
+ needs_ack = 0;
+ tcph->seq = otcph->ack_seq;
+ tcph->ack_seq = 0;
+ } else {
+ needs_ack = 1;
+ tcph->ack_seq = htonl(ntohl(otcph->seq) + otcph->syn + otcph->fin
+ + otcplen - (otcph->doff<<2));
+ tcph->seq = 0;
+ }
+
+ /* Reset flags */
+ ((u_int8_t *)tcph)[13] = 0;
+ tcph->rst = 1;
+ tcph->ack = needs_ack;
+
+ tcph->window = 0;
+ tcph->urg_ptr = 0;
+
+ /* Adjust TCP checksum */
+ tcph->check = 0;
+ tcph->check = tcp_v4_check(tcph, sizeof(struct tcphdr),
+ nskb->nh.iph->saddr,
+ nskb->nh.iph->daddr,
+ csum_partial((char *)tcph,
+ sizeof(struct tcphdr), 0));
+
+ /* Adjust IP TTL, DF */
+ nskb->nh.iph->ttl = MAXTTL;
+ /* Set DF, id = 0 */
+ nskb->nh.iph->frag_off = htons(IP_DF);
+ nskb->nh.iph->id = 0;
+
+ /* Adjust IP checksum */
+ nskb->nh.iph->check = 0;
+ nskb->nh.iph->check = ip_fast_csum((unsigned char *)nskb->nh.iph,
+ nskb->nh.iph->ihl);
+
+ /* "Never happens" */
+ if (nskb->len > nskb->dst->pmtu)
+ goto free_nskb;
+
+ nf_ct_attach(nskb, oldskb);
+
+ NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
+ ip_finish_output);
+ return;
+
+ free_nskb:
+ kfree_skb(nskb);
+}
+
+static void send_unreach(struct sk_buff *skb_in, int code)
+{
+ struct iphdr *iph;
+ struct udphdr *udph;
+ struct icmphdr *icmph;
+ struct sk_buff *nskb;
+ u32 saddr;
+ u8 tos;
+ int hh_len, length;
+ struct rtable *rt = (struct rtable*)skb_in->dst;
+ unsigned char *data;
+
+ if (!rt)
+ return;
+
+ /* FIXME: Use sysctl number. --RR */
+ if (!xrlim_allow(&rt->u.dst, 1*HZ))
+ return;
+
+ iph = skb_in->nh.iph;
+
+ /* No replies to physical multicast/broadcast */
+ if (skb_in->pkt_type!=PACKET_HOST)
+ return;
+
+ /* Now check at the protocol level */
+ if (rt->rt_flags&(RTCF_BROADCAST|RTCF_MULTICAST))
+ return;
+
+ /* Only reply to fragment 0. */
+ if (iph->frag_off&htons(IP_OFFSET))
+ return;
+
+ /* if UDP checksum is set, verify it's correct */
+ if (iph->protocol == IPPROTO_UDP
+ && skb_in->tail-(u8*)iph >= sizeof(struct udphdr)) {
+ int datalen = skb_in->len - (iph->ihl<<2);
+ udph = (struct udphdr *)((char *)iph + (iph->ihl<<2));
+ if (udph->check
+ && csum_tcpudp_magic(iph->saddr, iph->daddr,
+ datalen, IPPROTO_UDP,
+ csum_partial((char *)udph, datalen,
+ 0)) != 0)
+ return;
+ }
+
+ /* If we send an ICMP error to an ICMP error a mess would result.. */
+ if (iph->protocol == IPPROTO_ICMP
+ && skb_in->tail-(u8*)iph >= sizeof(struct icmphdr)) {
+ icmph = (struct icmphdr *)((char *)iph + (iph->ihl<<2));
+ /* Between echo-reply (0) and timestamp (13),
+ everything except echo-request (8) is an error.
+ Also, anything greater than NR_ICMP_TYPES is
+ unknown, and hence should be treated as an error... */
+ if ((icmph->type < ICMP_TIMESTAMP
+ && icmph->type != ICMP_ECHOREPLY
+ && icmph->type != ICMP_ECHO)
+ || icmph->type > NR_ICMP_TYPES)
+ return;
+ }
+
+ saddr = iph->daddr;
+ if (!(rt->rt_flags & RTCF_LOCAL))
+ saddr = 0;
+
+ tos = (iph->tos & IPTOS_TOS_MASK) | IPTOS_PREC_INTERNETCONTROL;
+
+ if (ip_route_output(&rt, iph->saddr, saddr, RT_TOS(tos), 0))
+ return;
+
+ /* RFC says return as much as we can without exceeding 576 bytes. */
+ length = skb_in->len + sizeof(struct iphdr) + sizeof(struct icmphdr);
+
+ if (length > rt->u.dst.pmtu)
+ length = rt->u.dst.pmtu;
+ if (length > 576)
+ length = 576;
+
+ hh_len = (rt->u.dst.dev->hard_header_len + 15)&~15;
+
+ nskb = alloc_skb(hh_len+15+length, GFP_ATOMIC);
+ if (!nskb) {
+ ip_rt_put(rt);
+ return;
+ }
+
+ nskb->priority = 0;
+ nskb->dst = &rt->u.dst;
+ skb_reserve(nskb, hh_len);
+
+ /* Set up IP header */
+ iph = nskb->nh.iph
+ = (struct iphdr *)skb_put(nskb, sizeof(struct iphdr));
+ iph->version=4;
+ iph->ihl=5;
+ iph->tos=tos;
+ iph->tot_len = htons(length);
+
+ /* PMTU discovery never applies to ICMP packets. */
+ iph->frag_off = 0;
+
+ iph->ttl = MAXTTL;
+ ip_select_ident(iph, &rt->u.dst, NULL);
+ iph->protocol=IPPROTO_ICMP;
+ iph->saddr=rt->rt_src;
+ iph->daddr=rt->rt_dst;
+ iph->check=0;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+
+ /* Set up ICMP header. */
+ icmph = nskb->h.icmph
+ = (struct icmphdr *)skb_put(nskb, sizeof(struct icmphdr));
+ icmph->type = ICMP_DEST_UNREACH;
+ icmph->code = code;
+ icmph->un.gateway = 0;
+ icmph->checksum = 0;
+
+ /* Copy as much of original packet as will fit */
+ data = skb_put(nskb,
+ length - sizeof(struct iphdr) - sizeof(struct icmphdr));
+ /* FIXME: won't work with nonlinear skbs --RR */
+ memcpy(data, skb_in->nh.iph,
+ length - sizeof(struct iphdr) - sizeof(struct icmphdr));
+ icmph->checksum = ip_compute_csum((unsigned char *)icmph,
+ length - sizeof(struct iphdr));
+
+ nf_ct_attach(nskb, skb_in);
+
+ NF_HOOK(PF_INET, NF_IP_LOCAL_OUT, nskb, NULL, nskb->dst->dev,
+ ip_finish_output);
+}
+
+static unsigned int reject(struct sk_buff **pskb,
+ unsigned int hooknum,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *targinfo,
+ void *userinfo)
+{
+ const struct ipt_reject_info *reject = targinfo;
+
+ /* Our naive response construction doesn't deal with IP
+ options, and probably shouldn't try. */
+ if ((*pskb)->nh.iph->ihl<<2 != sizeof(struct iphdr))
+ return NF_DROP;
+
+ /* WARNING: This code causes reentry within iptables.
+ This means that the iptables jump stack is now crap. We
+ must return an absolute verdict. --RR */
+ switch (reject->with) {
+ case IPT_ICMP_NET_UNREACHABLE:
+ send_unreach(*pskb, ICMP_NET_UNREACH);
+ break;
+ case IPT_ICMP_HOST_UNREACHABLE:
+ send_unreach(*pskb, ICMP_HOST_UNREACH);
+ break;
+ case IPT_ICMP_PROT_UNREACHABLE:
+ send_unreach(*pskb, ICMP_PROT_UNREACH);
+ break;
+ case IPT_ICMP_PORT_UNREACHABLE:
+ send_unreach(*pskb, ICMP_PORT_UNREACH);
+ break;
+ case IPT_ICMP_NET_PROHIBITED:
+ send_unreach(*pskb, ICMP_NET_ANO);
+ break;
+ case IPT_ICMP_HOST_PROHIBITED:
+ send_unreach(*pskb, ICMP_HOST_ANO);
+ break;
+ case IPT_ICMP_ADMIN_PROHIBITED:
+ send_unreach(*pskb, ICMP_PKT_FILTERED);
+ break;
+ case IPT_TCP_RESET:
+ send_reset(*pskb, hooknum);
+ case IPT_ICMP_ECHOREPLY:
+ /* Doesn't happen. */
+ break;
+ }
+
+ return NF_DROP;
+}
+
+static int check(const char *tablename,
+ const struct ipt_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ const struct ipt_reject_info *rejinfo = targinfo;
+
+ if (targinfosize != IPT_ALIGN(sizeof(struct ipt_reject_info))) {
+ DEBUGP("REJECT: targinfosize %u != 0\n", targinfosize);
+ return 0;
+ }
+
+ /* Only allow these for packet filtering. */
+ if (strcmp(tablename, "filter") != 0) {
+ DEBUGP("REJECT: bad table `%s'.\n", tablename);
+ return 0;
+ }
+ if ((hook_mask & ~((1 << NF_IP_LOCAL_IN)
+ | (1 << NF_IP_FORWARD)
+ | (1 << NF_IP_LOCAL_OUT))) != 0) {
+ DEBUGP("REJECT: bad hook mask %X\n", hook_mask);
+ return 0;
+ }
+
+ if (rejinfo->with == IPT_ICMP_ECHOREPLY) {
+ printk("REJECT: ECHOREPLY no longer supported.\n");
+ return 0;
+ } else if (rejinfo->with == IPT_TCP_RESET) {
+ /* Must specify that it's a TCP packet */
+ if (e->ip.proto != IPPROTO_TCP
+ || (e->ip.invflags & IPT_INV_PROTO)) {
+ DEBUGP("REJECT: TCP_RESET illegal for non-tcp\n");
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static struct ipt_target ipt_reject_reg
+= { { NULL, NULL }, "REJECT", reject, check, NULL, THIS_MODULE };
+
+static int __init init(void)
+{
+ if (ipt_register_target(&ipt_reject_reg))
+ return -EINVAL;
+ return 0;
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_target(&ipt_reject_reg);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
diff -Nur linux-mips-cvs/net/ipv4/netfilter/ipt_physdev.c linux-ebtables/net/ipv4/netfilter/ipt_physdev.c
--- linux-mips-cvs/net/ipv4/netfilter/ipt_physdev.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-ebtables/net/ipv4/netfilter/ipt_physdev.c 2005-02-07 05:52:50.000000000 +0100
@@ -0,0 +1,127 @@
+/* Kernel module to match the bridge port in and
+ * out device for IP packets coming into contact with a bridge. */
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/netfilter_ipv4/ipt_physdev.h>
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_bridge.h>
+#include <linux/netdevice.h>
+#define MATCH 1
+#define NOMATCH 0
+
+static int
+match(const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const void *matchinfo,
+ int offset,
+ const void *hdr,
+ u_int16_t datalen,
+ int *hotdrop)
+{
+ int i;
+ static const char nulldevname[IFNAMSIZ] = { 0 };
+ const struct ipt_physdev_info *info = matchinfo;
+ unsigned long ret;
+ const char *indev, *outdev;
+ struct nf_bridge_info *nf_bridge;
+
+ /* Not a bridged IP packet or no info available yet:
+ * LOCAL_OUT/mangle and LOCAL_OUT/nat don't know if
+ * the destination device will be a bridge. */
+ if (!(nf_bridge = skb->nf_bridge)) {
+ /* Return MATCH if the invert flags of the used options are on */
+ if ((info->bitmask & IPT_PHYSDEV_OP_BRIDGED) &&
+ !(info->invert & IPT_PHYSDEV_OP_BRIDGED))
+ return NOMATCH;
+ if ((info->bitmask & IPT_PHYSDEV_OP_ISIN) &&
+ !(info->invert & IPT_PHYSDEV_OP_ISIN))
+ return NOMATCH;
+ if ((info->bitmask & IPT_PHYSDEV_OP_ISOUT) &&
+ !(info->invert & IPT_PHYSDEV_OP_ISOUT))
+ return NOMATCH;
+ if ((info->bitmask & IPT_PHYSDEV_OP_IN) &&
+ !(info->invert & IPT_PHYSDEV_OP_IN))
+ return NOMATCH;
+ if ((info->bitmask & IPT_PHYSDEV_OP_OUT) &&
+ !(info->invert & IPT_PHYSDEV_OP_OUT))
+ return NOMATCH;
+ return MATCH;
+ }
+
+ /* This only makes sense in the FORWARD and POSTROUTING chains */
+ if ((info->bitmask & IPT_PHYSDEV_OP_BRIDGED) &&
+ (!!(nf_bridge->mask & BRNF_BRIDGED) ^
+ !(info->invert & IPT_PHYSDEV_OP_BRIDGED)))
+ return NOMATCH;
+
+ if ((info->bitmask & IPT_PHYSDEV_OP_ISIN &&
+ (!nf_bridge->physindev ^ !!(info->invert & IPT_PHYSDEV_OP_ISIN))) ||
+ (info->bitmask & IPT_PHYSDEV_OP_ISOUT &&
+ (!nf_bridge->physoutdev ^ !!(info->invert & IPT_PHYSDEV_OP_ISOUT))))
+ return NOMATCH;
+
+ if (!(info->bitmask & IPT_PHYSDEV_OP_IN))
+ goto match_outdev;
+ indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname;
+ for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+ ret |= (((const unsigned long *)indev)[i]
+ ^ ((const unsigned long *)info->physindev)[i])
+ & ((const unsigned long *)info->in_mask)[i];
+ }
+
+ if ((ret == 0) ^ !(info->invert & IPT_PHYSDEV_OP_IN))
+ return NOMATCH;
+
+match_outdev:
+ if (!(info->bitmask & IPT_PHYSDEV_OP_OUT))
+ return MATCH;
+ outdev = nf_bridge->physoutdev ?
+ nf_bridge->physoutdev->name : nulldevname;
+ for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+ ret |= (((const unsigned long *)outdev)[i]
+ ^ ((const unsigned long *)info->physoutdev)[i])
+ & ((const unsigned long *)info->out_mask)[i];
+ }
+
+ return (ret != 0) ^ !(info->invert & IPT_PHYSDEV_OP_OUT);
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ const struct ipt_physdev_info *info = matchinfo;
+
+ if (matchsize != IPT_ALIGN(sizeof(struct ipt_physdev_info)))
+ return 0;
+ if (!(info->bitmask & IPT_PHYSDEV_OP_MASK) ||
+ info->bitmask & ~IPT_PHYSDEV_OP_MASK)
+ return 0;
+ return 1;
+}
+
+static struct ipt_match physdev_match = {
+ .name = "physdev",
+ .match = &match,
+ .checkentry = &checkentry,
+ .me = THIS_MODULE,
+};
+
+static int __init init(void)
+{
+ return ipt_register_match(&physdev_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&physdev_match);
+}
+
+module_init(init);
+module_exit(fini);
+MODULE_LICENSE("GPL");
+EXPORT_NO_SYMBOLS;
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