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add netfilter connmark target

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1707 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2005-08-20 20:33:58 +00:00
parent 958541ed49
commit 66edfdac42
3 changed files with 356 additions and 0 deletions
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2
package/iptables/kernelconfig.mk
View File

@ -17,6 +17,7 @@ ext-$(CONFIG_IP_NF_MATCH_LENGTH) += length
ext-$(CONFIG_IP_NF_MATCH_TTL) += ttl
ext-$(CONFIG_IP_NF_MATCH_TCPMSS) += tcpmss
ext-$(CONFIG_IP_NF_MATCH_HELPER) += helper
ext-$(CONFIG_IP_NF_MATCH_CONNMARK) += connmark
#ext-$(CONFIG_IP_NF_MATCH_STATE) += state
#ext-$(CONFIG_IP_NF_MATCH_CONNTRACK) += conntrack
ext-$(CONFIG_IP_NF_MATCH_UNCLEAN) += unclean
@ -34,6 +35,7 @@ ext-$(CONFIG_IP_NF_TARGET_MARK) += MARK
ext-$(CONFIG_IP_NF_TARGET_ULOG) += ULOG
#ext-$(CONFIG_IP_NF_TARGET_TCPMSS) += TCPMSS
ext-$(CONFIG_IP_NF_TARGET_NETMAP) += NETMAP
ext-$(CONFIG_IP_NF_TARGET_CONNMARK) += CONNMARK
# add extensions that don't depend on kernel config
ext-m += TTL

3
target/linux/linux-2.4/config/brcm
View File

@ -340,6 +340,7 @@ CONFIG_NET_IPGRE=m
# IP: Netfilter Configuration
#
CONFIG_IP_NF_CONNTRACK=y
CONFIG_IP_NF_CONNTRACK_MARK=y
CONFIG_IP_NF_FTP=y
CONFIG_IP_NF_AMANDA=m
CONFIG_IP_NF_TFTP=m
@ -365,6 +366,7 @@ CONFIG_IP_NF_MATCH_TCPMSS=y
CONFIG_IP_NF_MATCH_HELPER=m
CONFIG_IP_NF_MATCH_STATE=y
CONFIG_IP_NF_MATCH_CONNTRACK=m
CONFIG_IP_NF_MATCH_CONNMARK=m
CONFIG_IP_NF_MATCH_UNCLEAN=m
CONFIG_IP_NF_MATCH_OWNER=m
CONFIG_IP_NF_MATCH_LAYER7=m
@ -390,6 +392,7 @@ CONFIG_IP_NF_TARGET_TOS=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_DSCP=m
CONFIG_IP_NF_TARGET_MARK=y
CONFIG_IP_NF_TARGET_CONNMARK=m
CONFIG_IP_NF_TARGET_LOG=y
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_TARGET_ULOG=m

351
target/linux/linux-2.4/patches/generic/113-netfilter_connmark.patch Normal file
View File

@ -0,0 +1,351 @@
diff -urN linux.old/include/linux/netfilter_ipv4/ip_conntrack.h linux.dev/include/linux/netfilter_ipv4/ip_conntrack.h
--- linux.old/include/linux/netfilter_ipv4/ip_conntrack.h 2005-08-20 20:02:06.619827000 +0200
+++ linux.dev/include/linux/netfilter_ipv4/ip_conntrack.h 2005-08-20 20:19:23.302029232 +0200
@@ -226,6 +226,9 @@
unsigned int app_data_len;
} layer7;
#endif
+#if defined(CONFIG_IP_NF_CONNTRACK_MARK)
+ unsigned long mark;
+#endif
};
/* get master conntrack via master expectation */
diff -urN linux.old/include/linux/netfilter_ipv4/ipt_CONNMARK.h linux.dev/include/linux/netfilter_ipv4/ipt_CONNMARK.h
--- linux.old/include/linux/netfilter_ipv4/ipt_CONNMARK.h 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/include/linux/netfilter_ipv4/ipt_CONNMARK.h 2005-08-20 20:19:41.058329864 +0200
@@ -0,0 +1,25 @@
+#ifndef _IPT_CONNMARK_H_target
+#define _IPT_CONNMARK_H_target
+
+/* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+ * by Henrik Nordstrom <hno@marasystems.com>
+ *
+ * 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.
+ */
+
+enum {
+ IPT_CONNMARK_SET = 0,
+ IPT_CONNMARK_SAVE,
+ IPT_CONNMARK_RESTORE
+};
+
+struct ipt_connmark_target_info {
+ unsigned long mark;
+ unsigned long mask;
+ u_int8_t mode;
+};
+
+#endif /*_IPT_CONNMARK_H_target*/
diff -urN linux.old/include/linux/netfilter_ipv4/ipt_connmark.h linux.dev/include/linux/netfilter_ipv4/ipt_connmark.h
--- linux.old/include/linux/netfilter_ipv4/ipt_connmark.h 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/include/linux/netfilter_ipv4/ipt_connmark.h 2005-08-20 20:19:41.058329864 +0200
@@ -0,0 +1,18 @@
+#ifndef _IPT_CONNMARK_H
+#define _IPT_CONNMARK_H
+
+/* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+ * by Henrik Nordstrom <hno@marasystems.com>
+ *
+ * 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.
+ */
+
+struct ipt_connmark_info {
+ unsigned long mark, mask;
+ u_int8_t invert;
+};
+
+#endif /*_IPT_CONNMARK_H*/
diff -urN linux.old/net/ipv4/netfilter/Config.in linux.dev/net/ipv4/netfilter/Config.in
--- linux.old/net/ipv4/netfilter/Config.in 2005-08-20 20:02:09.325416000 +0200
+++ linux.dev/net/ipv4/netfilter/Config.in 2005-08-20 20:29:11.546602464 +0200
@@ -6,7 +6,8 @@
tristate 'Connection tracking (required for masq/NAT)' CONFIG_IP_NF_CONNTRACK
if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
- dep_tristate ' FTP protocol support' CONFIG_IP_NF_FTP $CONFIG_IP_NF_CONNTRACK
+ bool ' Connection mark tracking support' CONFIG_IP_NF_CONNTRACK_MARK
+ dep_tristate ' FTP protocol support' CONFIG_IP_NF_FTP $CONFIG_IP_NF_CONNTRACKa
dep_tristate ' Amanda protocol support' CONFIG_IP_NF_AMANDA $CONFIG_IP_NF_CONNTRACK
dep_tristate ' TFTP protocol support' CONFIG_IP_NF_TFTP $CONFIG_IP_NF_CONNTRACK
dep_tristate ' IRC protocol support' CONFIG_IP_NF_IRC $CONFIG_IP_NF_CONNTRACK
@@ -42,6 +43,9 @@
if [ "$CONFIG_IP_NF_CONNTRACK" != "n" ]; then
dep_tristate ' Connection state match support' CONFIG_IP_NF_MATCH_STATE $CONFIG_IP_NF_CONNTRACK $CONFIG_IP_NF_IPTABLES
dep_tristate ' Connection tracking match support' CONFIG_IP_NF_MATCH_CONNTRACK $CONFIG_IP_NF_CONNTRACK $CONFIG_IP_NF_IPTABLES
+ if [ "$CONFIG_IP_NF_CONNTRACK_MARK" != "n" ]; then
+ dep_tristate ' Connection mark match support' CONFIG_IP_NF_MATCH_CONNMARK $CONFIG_IP_NF_IPTABLES
+ fi
fi
if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
dep_tristate ' Unclean match support (EXPERIMENTAL)' CONFIG_IP_NF_MATCH_UNCLEAN $CONFIG_IP_NF_IPTABLES
@@ -125,6 +129,9 @@
dep_tristate ' MARK target support' CONFIG_IP_NF_TARGET_MARK $CONFIG_IP_NF_MANGLE
fi
+ if [ "$CONFIG_IP_NF_CONNTRACK_MARK" != "n" ]; then
+ dep_tristate ' CONNMARK target support' CONFIG_IP_NF_TARGET_CONNMARK $CONFIG_IP_NF_IPTABLES
+ fi
dep_tristate ' LOG target support' CONFIG_IP_NF_TARGET_LOG $CONFIG_IP_NF_IPTABLES
dep_tristate ' TTL target support' CONFIG_IP_NF_TARGET_TTL $CONFIG_IP_NF_IPTABLES
dep_tristate ' ULOG target support' CONFIG_IP_NF_TARGET_ULOG $CONFIG_IP_NF_IPTABLES
diff -urN linux.old/net/ipv4/netfilter/Makefile linux.dev/net/ipv4/netfilter/Makefile
--- linux.old/net/ipv4/netfilter/Makefile 2005-08-20 20:02:09.326416000 +0200
+++ linux.dev/net/ipv4/netfilter/Makefile 2005-08-20 20:29:54.081136232 +0200
@@ -93,6 +93,7 @@
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_STATE) += ipt_state.o
+obj-$(CONFIG_IP_NF_MATCH_CONNMARK) += ipt_connmark.o
obj-$(CONFIG_IP_NF_MATCH_CONNTRACK) += ipt_conntrack.o
obj-$(CONFIG_IP_NF_MATCH_UNCLEAN) += ipt_unclean.o
obj-$(CONFIG_IP_NF_MATCH_TCPMSS) += ipt_tcpmss.o
@@ -110,6 +111,7 @@
obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
obj-$(CONFIG_IP_NF_NAT_SNMP_BASIC) += ip_nat_snmp_basic.o
obj-$(CONFIG_IP_NF_TARGET_LOG) += ipt_LOG.o
+obj-$(CONFIG_IP_NF_TARGET_CONNMARK) += ipt_CONNMARK.o
obj-$(CONFIG_IP_NF_TARGET_TTL) += ipt_TTL.o
obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
obj-$(CONFIG_IP_NF_TARGET_TCPMSS) += ipt_TCPMSS.o
diff -urN linux.old/net/ipv4/netfilter/ip_conntrack_core.c linux.dev/net/ipv4/netfilter/ip_conntrack_core.c
--- linux.old/net/ipv4/netfilter/ip_conntrack_core.c 2005-08-20 20:02:06.828795000 +0200
+++ linux.dev/net/ipv4/netfilter/ip_conntrack_core.c 2005-08-20 20:33:23.308328864 +0200
@@ -755,6 +755,9 @@
__set_bit(IPS_EXPECTED_BIT, &conntrack->status);
conntrack->master = expected;
expected->sibling = conntrack;
+#ifdef CONFIG_IP_NF_CONNTRACK_MARK
+ conntrack->mark = expected->expectant->mark;
+#endif
LIST_DELETE(&ip_conntrack_expect_list, expected);
expected->expectant->expecting--;
nf_conntrack_get(&master_ct(conntrack)->infos[0]);
diff -urN linux.old/net/ipv4/netfilter/ip_conntrack_standalone.c linux.dev/net/ipv4/netfilter/ip_conntrack_standalone.c
--- linux.old/net/ipv4/netfilter/ip_conntrack_standalone.c 2005-08-20 20:02:06.583833000 +0200
+++ linux.dev/net/ipv4/netfilter/ip_conntrack_standalone.c 2005-08-20 20:32:15.364657872 +0200
@@ -107,6 +107,9 @@
len += sprintf(buffer + len, "[ASSURED] ");
len += sprintf(buffer + len, "use=%u ",
atomic_read(&conntrack->ct_general.use));
+ #if defined(CONFIG_IP_NF_CONNTRACK_MARK)
+ len += sprintf(buffer + len, "mark=%ld ", conntrack->mark);
+ #endif
#if defined(CONFIG_IP_NF_MATCH_LAYER7) || defined(CONFIG_IP_NF_MATCH_LAYER7_MODULE)
if(conntrack->layer7.app_proto)
diff -urN linux.old/net/ipv4/netfilter/ipt_CONNMARK.c linux.dev/net/ipv4/netfilter/ipt_CONNMARK.c
--- linux.old/net/ipv4/netfilter/ipt_CONNMARK.c 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/net/ipv4/netfilter/ipt_CONNMARK.c 2005-08-20 20:21:28.666970864 +0200
@@ -0,0 +1,118 @@
+/* This kernel module is used to modify the connection mark values, or
+ * to optionally restore the skb nfmark from the connection mark
+ *
+ * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+ * by Henrik Nordstrom <hno@marasystems.com>
+ *
+ * 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/module.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <net/checksum.h>
+
+MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
+MODULE_DESCRIPTION("IP tables CONNMARK matching module");
+MODULE_LICENSE("GPL");
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_CONNMARK.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+static unsigned int
+target(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_connmark_target_info *markinfo = targinfo;
+ unsigned long diff;
+ unsigned long nfmark;
+ unsigned long newmark;
+
+ enum ip_conntrack_info ctinfo;
+ struct ip_conntrack *ct = ip_conntrack_get((*pskb), &ctinfo);
+ if (ct) {
+ switch(markinfo->mode) {
+ case IPT_CONNMARK_SET:
+ newmark = (ct->mark & ~markinfo->mask) | markinfo->mark;
+ if (newmark != ct->mark)
+ ct->mark = newmark;
+ break;
+ case IPT_CONNMARK_SAVE:
+ newmark = (ct->mark & ~markinfo->mask) | ((*pskb)->nfmark & markinfo->mask);
+ if (ct->mark != newmark)
+ ct->mark = newmark;
+ break;
+ case IPT_CONNMARK_RESTORE:
+ nfmark = (*pskb)->nfmark;
+ diff = (ct->mark ^ nfmark & markinfo->mask);
+ if (diff != 0) {
+ (*pskb)->nfmark = nfmark ^ diff;
+ (*pskb)->nfcache |= NFC_ALTERED;
+ }
+ break;
+ }
+ }
+
+ return IPT_CONTINUE;
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ipt_entry *e,
+ void *targinfo,
+ unsigned int targinfosize,
+ unsigned int hook_mask)
+{
+ struct ipt_connmark_target_info *matchinfo = targinfo;
+ if (targinfosize != IPT_ALIGN(sizeof(struct ipt_connmark_target_info))) {
+ printk(KERN_WARNING "CONNMARK: targinfosize %u != %Zu\n",
+ targinfosize,
+ IPT_ALIGN(sizeof(struct ipt_connmark_target_info)));
+ return 0;
+ }
+
+ if (matchinfo->mode == IPT_CONNMARK_RESTORE) {
+ if (strcmp(tablename, "mangle") != 0) {
+ printk(KERN_WARNING "CONNMARK: restore can only be called from \"mangle\" table, not \"%s\"\n", tablename);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static struct ipt_target ipt_connmark_reg = {
+ .name = "CONNMARK",
+ .target = &target,
+ .checkentry = &checkentry,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ipt_register_target(&ipt_connmark_reg);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_target(&ipt_connmark_reg);
+}
+
+module_init(init);
+module_exit(fini);
diff -urN linux.old/net/ipv4/netfilter/ipt_connmark.c linux.dev/net/ipv4/netfilter/ipt_connmark.c
--- linux.old/net/ipv4/netfilter/ipt_connmark.c 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/net/ipv4/netfilter/ipt_connmark.c 2005-08-20 20:21:28.666970864 +0200
@@ -0,0 +1,83 @@
+/* This kernel module matches connection mark values set by the
+ * CONNMARK target
+ *
+ * Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+ * by Henrik Nordstrom <hno@marasystems.com>
+ *
+ * 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/module.h>
+#include <linux/skbuff.h>
+
+MODULE_AUTHOR("Henrik Nordstrom <hno@marasytems.com>");
+MODULE_DESCRIPTION("IP tables connmark match module");
+MODULE_LICENSE("GPL");
+
+#include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/netfilter_ipv4/ipt_connmark.h>
+#include <linux/netfilter_ipv4/ip_conntrack.h>
+
+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)
+{
+ const struct ipt_connmark_info *info = matchinfo;
+ enum ip_conntrack_info ctinfo;
+ struct ip_conntrack *ct = ip_conntrack_get((struct sk_buff *)skb, &ctinfo);
+ if (!ct)
+ return 0;
+
+ return ((ct->mark & info->mask) == info->mark) ^ info->invert;
+}
+
+static int
+checkentry(const char *tablename,
+ const struct ipt_ip *ip,
+ void *matchinfo,
+ unsigned int matchsize,
+ unsigned int hook_mask)
+{
+ if (matchsize != IPT_ALIGN(sizeof(struct ipt_connmark_info)))
+ return 0;
+
+ return 1;
+}
+
+static struct ipt_match connmark_match = {
+ .name = "connmark",
+ .match = &match,
+ .checkentry = &checkentry,
+ .me = THIS_MODULE
+};
+
+static int __init init(void)
+{
+ return ipt_register_match(&connmark_match);
+}
+
+static void __exit fini(void)
+{
+ ipt_unregister_match(&connmark_match);
+}
+
+module_init(init);
+module_exit(fini);