mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-26 10:40:22 +02:00
add netfilter netmap target
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1343 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
parent
af51a6df01
commit
ab11d148d1
@ -366,6 +366,7 @@ CONFIG_IP_NF_NAT=y
|
||||
CONFIG_IP_NF_NAT_NEEDED=y
|
||||
CONFIG_IP_NF_TARGET_MASQUERADE=y
|
||||
CONFIG_IP_NF_TARGET_REDIRECT=m
|
||||
CONFIG_IP_NF_TARGET_NETMAP=m
|
||||
CONFIG_IP_NF_NAT_PPTP=m
|
||||
CONFIG_IP_NF_NAT_PROTO_GRE=m
|
||||
CONFIG_IP_NF_NAT_AMANDA=m
|
||||
|
||||
@ -378,6 +378,7 @@ CONFIG_IP_NF_NAT=y
|
||||
CONFIG_IP_NF_NAT_NEEDED=y
|
||||
CONFIG_IP_NF_TARGET_MASQUERADE=y
|
||||
CONFIG_IP_NF_TARGET_REDIRECT=m
|
||||
CONFIG_IP_NF_TARGET_NETMAP=m
|
||||
CONFIG_IP_NF_NAT_PPTP=m
|
||||
CONFIG_IP_NF_NAT_PROTO_GRE=m
|
||||
CONFIG_IP_NF_NAT_AMANDA=m
|
||||
|
||||
@ -0,0 +1,159 @@
|
||||
diff -urN linux-2.4.30.orig/Documentation/Configure.help linux-2.4.30/Documentation/Configure.help
|
||||
--- linux-2.4.30.orig/Documentation/Configure.help 2005-07-01 02:06:36.000000000 +0200
|
||||
+++ linux-2.4.30/Documentation/Configure.help 2005-07-01 00:41:09.000000000 +0200
|
||||
@@ -3086,6 +3086,17 @@
|
||||
If you want to compile it as a module, say M here and read
|
||||
<file:Documentation/modules.txt>. If unsure, say `N'.
|
||||
|
||||
+NETMAP target support
|
||||
+CONFIG_IP_NF_TARGET_NETMAP
|
||||
+ NETMAP is an implementation of static 1:1 NAT mapping of network
|
||||
+ addresses. It maps the network address part, while keeping the
|
||||
+ host address part intact. It is similar to Fast NAT, except that
|
||||
+ Netfilter's connection tracking doesn't work well with Fast NAT.
|
||||
+
|
||||
+ If you want to compile it as a module, say M here and read
|
||||
+ Documentation/modules.txt. The module will be called
|
||||
+ ipt_NETMAP.o. If unsure, say `N'.
|
||||
+
|
||||
Packet mangling
|
||||
CONFIG_IP_NF_MANGLE
|
||||
This option adds a `mangle' table to iptables: see the man page for
|
||||
diff -urN linux-2.4.30.orig/net/ipv4/netfilter/Config.in linux-2.4.30/net/ipv4/netfilter/Config.in
|
||||
--- linux-2.4.30.orig/net/ipv4/netfilter/Config.in 2005-07-01 02:06:35.000000000 +0200
|
||||
+++ linux-2.4.30/net/ipv4/netfilter/Config.in 2005-07-01 00:41:09.000000000 +0200
|
||||
@@ -69,6 +69,7 @@
|
||||
define_bool CONFIG_IP_NF_NAT_NEEDED y
|
||||
dep_tristate ' MASQUERADE target support' CONFIG_IP_NF_TARGET_MASQUERADE $CONFIG_IP_NF_NAT
|
||||
dep_tristate ' REDIRECT target support' CONFIG_IP_NF_TARGET_REDIRECT $CONFIG_IP_NF_NAT
|
||||
+ dep_tristate ' NETMAP target support' CONFIG_IP_NF_TARGET_NETMAP $CONFIG_IP_NF_NAT
|
||||
if [ "$CONFIG_IP_NF_PPTP" = "m" ]; then
|
||||
define_tristate CONFIG_IP_NF_NAT_PPTP m
|
||||
else
|
||||
diff -urN linux-2.4.30.orig/net/ipv4/netfilter/ipt_NETMAP.c linux-2.4.30/net/ipv4/netfilter/ipt_NETMAP.c
|
||||
--- linux-2.4.30.orig/net/ipv4/netfilter/ipt_NETMAP.c 1970-01-01 01:00:00.000000000 +0100
|
||||
+++ linux-2.4.30/net/ipv4/netfilter/ipt_NETMAP.c 2005-07-01 00:41:09.000000000 +0200
|
||||
@@ -0,0 +1,112 @@
|
||||
+/* NETMAP - static NAT mapping of IP network addresses (1:1).
|
||||
+ The mapping can be applied to source (POSTROUTING),
|
||||
+ destination (PREROUTING), or both (with separate rules).
|
||||
+
|
||||
+ Author: Svenning Soerensen <svenning@post5.tele.dk>
|
||||
+*/
|
||||
+
|
||||
+#include <linux/config.h>
|
||||
+#include <linux/ip.h>
|
||||
+#include <linux/module.h>
|
||||
+#include <linux/netdevice.h>
|
||||
+#include <linux/netfilter.h>
|
||||
+#include <linux/netfilter_ipv4.h>
|
||||
+#include <linux/netfilter_ipv4/ip_nat_rule.h>
|
||||
+
|
||||
+#define MODULENAME "NETMAP"
|
||||
+MODULE_LICENSE("GPL");
|
||||
+MODULE_AUTHOR("Svenning Soerensen <svenning@post5.tele.dk>");
|
||||
+MODULE_DESCRIPTION("iptables 1:1 NAT mapping of IP networks target");
|
||||
+
|
||||
+#if 0
|
||||
+#define DEBUGP printk
|
||||
+#else
|
||||
+#define DEBUGP(format, args...)
|
||||
+#endif
|
||||
+
|
||||
+static int
|
||||
+check(const char *tablename,
|
||||
+ const struct ipt_entry *e,
|
||||
+ void *targinfo,
|
||||
+ unsigned int targinfosize,
|
||||
+ unsigned int hook_mask)
|
||||
+{
|
||||
+ const struct ip_nat_multi_range *mr = targinfo;
|
||||
+
|
||||
+ if (strcmp(tablename, "nat") != 0) {
|
||||
+ DEBUGP(MODULENAME":check: bad table `%s'.\n", tablename);
|
||||
+ return 0;
|
||||
+ }
|
||||
+ if (targinfosize != IPT_ALIGN(sizeof(*mr))) {
|
||||
+ DEBUGP(MODULENAME":check: size %u.\n", targinfosize);
|
||||
+ return 0;
|
||||
+ }
|
||||
+ if (hook_mask & ~((1 << NF_IP_PRE_ROUTING) | (1 << NF_IP_POST_ROUTING))) {
|
||||
+ DEBUGP(MODULENAME":check: bad hooks %x.\n", hook_mask);
|
||||
+ return 0;
|
||||
+ }
|
||||
+ if (!(mr->range[0].flags & IP_NAT_RANGE_MAP_IPS)) {
|
||||
+ DEBUGP(MODULENAME":check: bad MAP_IPS.\n");
|
||||
+ return 0;
|
||||
+ }
|
||||
+ if (mr->rangesize != 1) {
|
||||
+ DEBUGP(MODULENAME":check: bad rangesize %u.\n", mr->rangesize);
|
||||
+ return 0;
|
||||
+ }
|
||||
+ return 1;
|
||||
+}
|
||||
+
|
||||
+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)
|
||||
+{
|
||||
+ struct ip_conntrack *ct;
|
||||
+ enum ip_conntrack_info ctinfo;
|
||||
+ u_int32_t new_ip, netmask;
|
||||
+ const struct ip_nat_multi_range *mr = targinfo;
|
||||
+ struct ip_nat_multi_range newrange;
|
||||
+
|
||||
+ IP_NF_ASSERT(hooknum == NF_IP_PRE_ROUTING
|
||||
+ || hooknum == NF_IP_POST_ROUTING);
|
||||
+ ct = ip_conntrack_get(*pskb, &ctinfo);
|
||||
+
|
||||
+ netmask = ~(mr->range[0].min_ip ^ mr->range[0].max_ip);
|
||||
+
|
||||
+ if (hooknum == NF_IP_PRE_ROUTING)
|
||||
+ new_ip = (*pskb)->nh.iph->daddr & ~netmask;
|
||||
+ else
|
||||
+ new_ip = (*pskb)->nh.iph->saddr & ~netmask;
|
||||
+ new_ip |= mr->range[0].min_ip & netmask;
|
||||
+
|
||||
+ newrange = ((struct ip_nat_multi_range)
|
||||
+ { 1, { { mr->range[0].flags | IP_NAT_RANGE_MAP_IPS,
|
||||
+ new_ip, new_ip,
|
||||
+ mr->range[0].min, mr->range[0].max } } });
|
||||
+
|
||||
+ /* Hand modified range to generic setup. */
|
||||
+ return ip_nat_setup_info(ct, &newrange, hooknum);
|
||||
+}
|
||||
+
|
||||
+static struct ipt_target target_module = {
|
||||
+ .name = MODULENAME,
|
||||
+ .target = target,
|
||||
+ .checkentry = check,
|
||||
+ .me = THIS_MODULE
|
||||
+};
|
||||
+
|
||||
+static int __init init(void)
|
||||
+{
|
||||
+ return ipt_register_target(&target_module);
|
||||
+}
|
||||
+
|
||||
+static void __exit fini(void)
|
||||
+{
|
||||
+ ipt_unregister_target(&target_module);
|
||||
+}
|
||||
+
|
||||
+module_init(init);
|
||||
+module_exit(fini);
|
||||
diff -urN linux-2.4.30.orig/net/ipv4/netfilter/Makefile linux-2.4.30/net/ipv4/netfilter/Makefile
|
||||
--- linux-2.4.30.orig/net/ipv4/netfilter/Makefile 2005-07-01 02:06:35.000000000 +0200
|
||||
+++ linux-2.4.30/net/ipv4/netfilter/Makefile 2005-07-01 00:41:09.000000000 +0200
|
||||
@@ -110,6 +110,7 @@
|
||||
obj-$(CONFIG_IP_NF_TARGET_MARK) += ipt_MARK.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
|
||||
obj-$(CONFIG_IP_NF_TARGET_REDIRECT) += ipt_REDIRECT.o
|
||||
+obj-$(CONFIG_IP_NF_TARGET_NETMAP) += ipt_NETMAP.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_TTL) += ipt_TTL.o
|
||||
Loading…
Reference in New Issue
Block a user