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authorPatrick McHardy <kaber@trash.net>2006-03-20 18:03:40 -0800
committerDavid S. Miller <davem@davemloft.net>2006-03-20 18:03:40 -0800
commitc4b885139203d37f76662c37ae645fe8e0f4e4e5 (patch)
tree5cedf4d632b273df81bf1712b95dbc8b96cdc0e4 /net/ipv4
parentf2ffd9eeda82b476c034d733be08ecf6a87d2edf (diff)
downloadop-kernel-dev-c4b885139203d37f76662c37ae645fe8e0f4e4e5.zip
op-kernel-dev-c4b885139203d37f76662c37ae645fe8e0f4e4e5.tar.gz
[NETFILTER]: x_tables: replace IPv4/IPv6 policy match by address family independant version
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/netfilter/Kconfig10
-rw-r--r--net/ipv4/netfilter/Makefile1
-rw-r--r--net/ipv4/netfilter/ipt_policy.c174
3 files changed, 0 insertions, 185 deletions
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index db78303..933ee7a 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -303,16 +303,6 @@ config IP_NF_MATCH_HASHLIMIT
destination IP' or `500pps from any given source IP' with a single
IPtables rule.
-config IP_NF_MATCH_POLICY
- tristate "IPsec policy match support"
- depends on IP_NF_IPTABLES && XFRM
- help
- Policy matching allows you to match packets based on the
- IPsec policy that was used during decapsulation/will
- be used during encapsulation.
-
- To compile it as a module, choose M here. If unsure, say N.
-
# `filter', generic and specific targets
config IP_NF_FILTER
tristate "Packet filtering"
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index e5c5b32..3fe8092 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -57,7 +57,6 @@ obj-$(CONFIG_IP_NF_MATCH_DSCP) += ipt_dscp.o
obj-$(CONFIG_IP_NF_MATCH_AH_ESP) += ipt_ah.o ipt_esp.o
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
-obj-$(CONFIG_IP_NF_MATCH_POLICY) += ipt_policy.o
# targets
obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
diff --git a/net/ipv4/netfilter/ipt_policy.c b/net/ipv4/netfilter/ipt_policy.c
deleted file mode 100644
index b73f590..0000000
--- a/net/ipv4/netfilter/ipt_policy.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/* IP tables module for matching IPsec policy
- *
- * Copyright (c) 2004,2005 Patrick McHardy, <kaber@trash.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-#include <net/xfrm.h>
-
-#include <linux/netfilter_ipv4.h>
-#include <linux/netfilter_ipv4/ip_tables.h>
-#include <linux/netfilter_ipv4/ipt_policy.h>
-
-MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
-MODULE_DESCRIPTION("IPtables IPsec policy matching module");
-MODULE_LICENSE("GPL");
-
-
-static inline int
-match_xfrm_state(struct xfrm_state *x, const struct ipt_policy_elem *e)
-{
-#define MATCH_ADDR(x,y,z) (!e->match.x || \
- ((e->x.a4.s_addr == (e->y.a4.s_addr & (z))) \
- ^ e->invert.x))
-#define MATCH(x,y) (!e->match.x || ((e->x == (y)) ^ e->invert.x))
-
- return MATCH_ADDR(saddr, smask, x->props.saddr.a4) &&
- MATCH_ADDR(daddr, dmask, x->id.daddr.a4) &&
- MATCH(proto, x->id.proto) &&
- MATCH(mode, x->props.mode) &&
- MATCH(spi, x->id.spi) &&
- MATCH(reqid, x->props.reqid);
-}
-
-static int
-match_policy_in(const struct sk_buff *skb, const struct ipt_policy_info *info)
-{
- const struct ipt_policy_elem *e;
- struct sec_path *sp = skb->sp;
- int strict = info->flags & IPT_POLICY_MATCH_STRICT;
- int i, pos;
-
- if (sp == NULL)
- return -1;
- if (strict && info->len != sp->len)
- return 0;
-
- for (i = sp->len - 1; i >= 0; i--) {
- pos = strict ? i - sp->len + 1 : 0;
- if (pos >= info->len)
- return 0;
- e = &info->pol[pos];
-
- if (match_xfrm_state(sp->x[i].xvec, e)) {
- if (!strict)
- return 1;
- } else if (strict)
- return 0;
- }
-
- return strict ? 1 : 0;
-}
-
-static int
-match_policy_out(const struct sk_buff *skb, const struct ipt_policy_info *info)
-{
- const struct ipt_policy_elem *e;
- struct dst_entry *dst = skb->dst;
- int strict = info->flags & IPT_POLICY_MATCH_STRICT;
- int i, pos;
-
- if (dst->xfrm == NULL)
- return -1;
-
- for (i = 0; dst && dst->xfrm; dst = dst->child, i++) {
- pos = strict ? i : 0;
- if (pos >= info->len)
- return 0;
- e = &info->pol[pos];
-
- if (match_xfrm_state(dst->xfrm, e)) {
- if (!strict)
- return 1;
- } else if (strict)
- return 0;
- }
-
- return strict ? i == info->len : 0;
-}
-
-static int match(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const struct xt_match *match,
- const void *matchinfo,
- int offset,
- unsigned int protoff,
- int *hotdrop)
-{
- const struct ipt_policy_info *info = matchinfo;
- int ret;
-
- if (info->flags & IPT_POLICY_MATCH_IN)
- ret = match_policy_in(skb, info);
- else
- ret = match_policy_out(skb, info);
-
- if (ret < 0)
- ret = info->flags & IPT_POLICY_MATCH_NONE ? 1 : 0;
- else if (info->flags & IPT_POLICY_MATCH_NONE)
- ret = 0;
-
- return ret;
-}
-
-static int checkentry(const char *tablename, const void *ip_void,
- const struct xt_match *match,
- void *matchinfo, unsigned int matchsize,
- unsigned int hook_mask)
-{
- struct ipt_policy_info *info = matchinfo;
-
- if (!(info->flags & (IPT_POLICY_MATCH_IN|IPT_POLICY_MATCH_OUT))) {
- printk(KERN_ERR "ipt_policy: neither incoming nor "
- "outgoing policy selected\n");
- return 0;
- }
- if (hook_mask & (1 << NF_IP_PRE_ROUTING | 1 << NF_IP_LOCAL_IN)
- && info->flags & IPT_POLICY_MATCH_OUT) {
- printk(KERN_ERR "ipt_policy: output policy not valid in "
- "PRE_ROUTING and INPUT\n");
- return 0;
- }
- if (hook_mask & (1 << NF_IP_POST_ROUTING | 1 << NF_IP_LOCAL_OUT)
- && info->flags & IPT_POLICY_MATCH_IN) {
- printk(KERN_ERR "ipt_policy: input policy not valid in "
- "POST_ROUTING and OUTPUT\n");
- return 0;
- }
- if (info->len > IPT_POLICY_MAX_ELEM) {
- printk(KERN_ERR "ipt_policy: too many policy elements\n");
- return 0;
- }
-
- return 1;
-}
-
-static struct ipt_match policy_match = {
- .name = "policy",
- .match = match,
- .matchsize = sizeof(struct ipt_policy_info),
- .checkentry = checkentry,
- .me = THIS_MODULE,
-};
-
-static int __init init(void)
-{
- return ipt_register_match(&policy_match);
-}
-
-static void __exit fini(void)
-{
- ipt_unregister_match(&policy_match);
-}
-
-module_init(init);
-module_exit(fini);
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