diff options
author | Imre Kaloz <kaloz@openwrt.org> | 2012-10-23 12:21:34 +0000 |
---|---|---|
committer | Imre Kaloz <kaloz@openwrt.org> | 2012-10-23 12:21:34 +0000 |
commit | 949b46d13d1e21b596f505a2e69956565e365d77 (patch) | |
tree | 4b51f4852224df7cc2d056071ee51bfcb9c5b7f4 /target/linux/generic/patches-3.6/610-netfilter_match_bypass_default_checks.patch | |
parent | 0d2cf5f9e363c8e41b32921b0ab2aa3d4621dfd5 (diff) | |
download | master-31e0f0ae-949b46d13d1e21b596f505a2e69956565e365d77.tar.gz master-31e0f0ae-949b46d13d1e21b596f505a2e69956565e365d77.tar.bz2 master-31e0f0ae-949b46d13d1e21b596f505a2e69956565e365d77.zip |
linux 3.6 support (work in progress)
SVN-Revision: 33897
Diffstat (limited to 'target/linux/generic/patches-3.6/610-netfilter_match_bypass_default_checks.patch')
-rw-r--r-- | target/linux/generic/patches-3.6/610-netfilter_match_bypass_default_checks.patch | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.6/610-netfilter_match_bypass_default_checks.patch b/target/linux/generic/patches-3.6/610-netfilter_match_bypass_default_checks.patch new file mode 100644 index 0000000000..51c9e0999b --- /dev/null +++ b/target/linux/generic/patches-3.6/610-netfilter_match_bypass_default_checks.patch @@ -0,0 +1,93 @@ +--- a/include/linux/netfilter_ipv4/ip_tables.h ++++ b/include/linux/netfilter_ipv4/ip_tables.h +@@ -93,6 +93,7 @@ struct ipt_ip { + #define IPT_F_FRAG 0x01 /* Set if rule is a fragment rule */ + #define IPT_F_GOTO 0x02 /* Set if jump is a goto */ + #define IPT_F_MASK 0x03 /* All possible flag bits mask. */ ++#define IPT_F_NO_DEF_MATCH 0x80 /* Internal: no default match rules present */ + + /* Values for "inv" field in struct ipt_ip. */ + #define IPT_INV_VIA_IN 0x01 /* Invert the sense of IN IFACE. */ +--- a/net/ipv4/netfilter/ip_tables.c ++++ b/net/ipv4/netfilter/ip_tables.c +@@ -81,6 +81,9 @@ ip_packet_match(const struct iphdr *ip, + + #define FWINV(bool, invflg) ((bool) ^ !!(ipinfo->invflags & (invflg))) + ++ if (ipinfo->flags & IPT_F_NO_DEF_MATCH) ++ return true; ++ + if (FWINV((ip->saddr&ipinfo->smsk.s_addr) != ipinfo->src.s_addr, + IPT_INV_SRCIP) || + FWINV((ip->daddr&ipinfo->dmsk.s_addr) != ipinfo->dst.s_addr, +@@ -134,6 +137,29 @@ ip_packet_match(const struct iphdr *ip, + return true; + } + ++static void ++ip_checkdefault(struct ipt_ip *ip) ++{ ++ static const char iface_mask[IFNAMSIZ] = {}; ++ ++ if (ip->invflags || ip->flags & IPT_F_FRAG) ++ return; ++ ++ if (memcmp(ip->iniface_mask, iface_mask, IFNAMSIZ) != 0) ++ return; ++ ++ if (memcmp(ip->outiface_mask, iface_mask, IFNAMSIZ) != 0) ++ return; ++ ++ if (ip->smsk.s_addr || ip->dmsk.s_addr) ++ return; ++ ++ if (ip->proto) ++ return; ++ ++ ip->flags |= IPT_F_NO_DEF_MATCH; ++} ++ + static bool + ip_checkentry(const struct ipt_ip *ip) + { +@@ -561,7 +587,7 @@ static void cleanup_match(struct xt_entr + } + + static int +-check_entry(const struct ipt_entry *e, const char *name) ++check_entry(struct ipt_entry *e, const char *name) + { + const struct xt_entry_target *t; + +@@ -570,6 +596,8 @@ check_entry(const struct ipt_entry *e, c + return -EINVAL; + } + ++ ip_checkdefault(&e->ip); ++ + if (e->target_offset + sizeof(struct xt_entry_target) > + e->next_offset) + return -EINVAL; +@@ -931,6 +959,7 @@ copy_entries_to_user(unsigned int total_ + const struct xt_table_info *private = table->private; + int ret = 0; + const void *loc_cpu_entry; ++ u8 flags; + + counters = alloc_counters(table); + if (IS_ERR(counters)) +@@ -961,6 +990,14 @@ copy_entries_to_user(unsigned int total_ + ret = -EFAULT; + goto free_counters; + } ++ ++ flags = e->ip.flags & IPT_F_MASK; ++ if (copy_to_user(userptr + off ++ + offsetof(struct ipt_entry, ip.flags), ++ &flags, sizeof(flags)) != 0) { ++ ret = -EFAULT; ++ goto free_counters; ++ } + + for (i = sizeof(struct ipt_entry); + i < e->target_offset; |