mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-08-21 13:23:39 +03:00
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21952 3c298f89-4303-0410-b956-a3cf2f4a3e73
145 lines
4.1 KiB
Diff
145 lines
4.1 KiB
Diff
--- a/include/linux/netfilter_ipv4/ip_tables.h
|
|
+++ b/include/linux/netfilter_ipv4/ip_tables.h
|
|
@@ -62,6 +62,7 @@ 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
|
|
@@ -87,6 +87,9 @@ 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,
|
|
@@ -137,13 +140,35 @@ ip_packet_match(const struct iphdr *ip,
|
|
return false;
|
|
}
|
|
|
|
+#undef FWINV
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
-ip_checkentry(const struct ipt_ip *ip)
|
|
+ip_checkentry(struct ipt_ip *ip)
|
|
{
|
|
- if (ip->flags & ~IPT_F_MASK) {
|
|
+#define FWINV(bool, invflg) ((bool) || (ip->invflags & (invflg)))
|
|
+
|
|
+ if (FWINV(ip->smsk.s_addr, IPT_INV_SRCIP) ||
|
|
+ FWINV(ip->dmsk.s_addr, IPT_INV_DSTIP))
|
|
+ goto has_match_rules;
|
|
+
|
|
+ if (FWINV(!!((const unsigned long *)ip->iniface_mask)[0],
|
|
+ IPT_INV_VIA_IN) ||
|
|
+ FWINV(!!((const unsigned long *)ip->outiface_mask)[0],
|
|
+ IPT_INV_VIA_OUT))
|
|
+ goto has_match_rules;
|
|
+
|
|
+ if (FWINV(ip->proto, IPT_INV_PROTO))
|
|
+ goto has_match_rules;
|
|
+
|
|
+ if (FWINV(ip->flags&IPT_F_FRAG, IPT_INV_FRAG))
|
|
+ goto has_match_rules;
|
|
+
|
|
+ ip->flags |= IPT_F_NO_DEF_MATCH;
|
|
+
|
|
+has_match_rules:
|
|
+ if (ip->flags & ~(IPT_F_MASK|IPT_F_NO_DEF_MATCH)) {
|
|
duprintf("Unknown flag bits set: %08X\n",
|
|
ip->flags & ~IPT_F_MASK);
|
|
return false;
|
|
@@ -153,6 +178,8 @@ ip_checkentry(const struct ipt_ip *ip)
|
|
ip->invflags & ~IPT_INV_MASK);
|
|
return false;
|
|
}
|
|
+
|
|
+#undef FWINV
|
|
return true;
|
|
}
|
|
|
|
@@ -200,7 +227,6 @@ unconditional(const struct ipt_ip *ip)
|
|
return 0;
|
|
|
|
return 1;
|
|
-#undef FWINV
|
|
}
|
|
|
|
#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
|
|
@@ -326,8 +352,28 @@ ipt_do_table(struct sk_buff *skb,
|
|
struct xt_match_param mtpar;
|
|
struct xt_target_param tgpar;
|
|
|
|
- /* Initialization */
|
|
ip = ip_hdr(skb);
|
|
+
|
|
+ IP_NF_ASSERT(table->valid_hooks & (1 << hook));
|
|
+ xt_info_rdlock_bh();
|
|
+ private = table->private;
|
|
+ table_base = private->entries[smp_processor_id()];
|
|
+ e = get_entry(table_base, private->hook_entry[hook]);
|
|
+
|
|
+ if (e->target_offset <= sizeof(struct ipt_entry) &&
|
|
+ (e->ip.flags & IPT_F_NO_DEF_MATCH)) {
|
|
+ struct ipt_entry_target *t = ipt_get_target(e);
|
|
+ if (!t->u.kernel.target->target) {
|
|
+ int v = ((struct ipt_standard_target *)t)->verdict;
|
|
+ if ((v < 0) && (v != IPT_RETURN)) {
|
|
+ ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1);
|
|
+ xt_info_rdunlock_bh();
|
|
+ return (unsigned)(-v) - 1;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Initialization */
|
|
datalen = skb->len - ip->ihl * 4;
|
|
indev = in ? in->name : nulldevname;
|
|
outdev = out ? out->name : nulldevname;
|
|
@@ -345,13 +391,6 @@ ipt_do_table(struct sk_buff *skb,
|
|
mtpar.family = tgpar.family = NFPROTO_IPV4;
|
|
mtpar.hooknum = tgpar.hooknum = hook;
|
|
|
|
- IP_NF_ASSERT(table->valid_hooks & (1 << hook));
|
|
- xt_info_rdlock_bh();
|
|
- private = table->private;
|
|
- table_base = private->entries[smp_processor_id()];
|
|
-
|
|
- e = get_entry(table_base, private->hook_entry[hook]);
|
|
-
|
|
/* For return from builtin chain */
|
|
back = get_entry(table_base, private->underflow[hook]);
|
|
|
|
@@ -978,6 +1017,7 @@ copy_entries_to_user(unsigned int total_
|
|
unsigned int i;
|
|
const struct ipt_entry_match *m;
|
|
const struct ipt_entry_target *t;
|
|
+ u8 flags;
|
|
|
|
e = (struct ipt_entry *)(loc_cpu_entry + off);
|
|
if (copy_to_user(userptr + off
|
|
@@ -987,6 +1027,14 @@ copy_entries_to_user(unsigned int total_
|
|
ret = -EFAULT;
|
|
goto free_counters;
|
|
}
|
|
+
|
|
+ flags = e->ip.flags & ~IPT_F_NO_DEF_MATCH;
|
|
+ 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;
|