diff -Nurb linux-2.6.22-521/net/netfilter/xt_MARK.c linux-2.6.22-522/net/netfilter/xt_MARK.c
--- linux-2.6.22-521/net/netfilter/xt_MARK.c 2007-07-08 19:32:17.000000000 -0400
-+++ linux-2.6.22-522/net/netfilter/xt_MARK.c 2008-08-04 16:44:16.000000000 -0400
-@@ -5,13 +5,19 @@
++++ linux-2.6.22-522/net/netfilter/xt_MARK.c 2008-09-14 16:50:22.000000000 -0400
+@@ -5,13 +5,18 @@
* 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/version.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
-+#include <net/udp.h>
#include <net/checksum.h>
+#include <net/route.h>
+#include <net/inet_hashtables.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_MARK.h>
-@@ -21,6 +27,48 @@
+@@ -21,6 +26,50 @@
MODULE_ALIAS("ipt_MARK");
MODULE_ALIAS("ip6t_MARK");
++#define PEERCRED_SET(x) ((x!=0) && (x!=(unsigned int)-1))
++
+static inline u_int16_t
+get_dst_port(struct nf_conntrack_tuple *tuple)
+{
static unsigned int
target_v0(struct sk_buff **pskb,
const struct net_device *in,
-@@ -35,6 +83,67 @@
+@@ -35,6 +84,10 @@
return XT_CONTINUE;
}
+extern DEFINE_PER_CPU(int, sknid_elevator);
-+static struct sock *__udp4_lib_lookup(__be32 saddr, __be16 sport,
-+ __be32 daddr, __be16 dport,
-+ int dif, struct hlist_head udptable[])
-+{
-+ struct sock *sk, *result = NULL;
-+ struct hlist_node *node;
-+ unsigned short hnum = ntohs(dport);
-+ int badness = -1;
-+
-+ read_lock(&udp_hash_lock);
-+
-+ sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
-+ struct inet_sock *inet = inet_sk(sk);
-+
-+ if (sk->sk_hash == hnum && !ipv6_only_sock(sk)) {
-+ int score = (sk->sk_family == PF_INET ? 1 : 0);
-+
-+ if (inet->rcv_saddr) {
-+ if (inet->rcv_saddr != daddr)
-+ continue;
-+ score+=2;
-+ } else {
-+ /* block non nx_info ips */
-+ if (!v4_addr_in_nx_info(sk->sk_nx_info,
-+ daddr, NXA_MASK_BIND))
-+ continue;
-+ }
-+ if (inet->daddr) {
-+ if (inet->daddr != saddr)
-+ continue;
-+ score+=2;
-+ }
-+ if (inet->dport) {
-+ if (inet->dport != sport)
-+ continue;
-+ score+=2;
-+ }
-+ if (sk->sk_bound_dev_if) {
-+ if (sk->sk_bound_dev_if != dif)
-+ continue;
-+ score+=2;
-+ }
-+ if (score == 9) {
-+ result = sk;
-+ break;
-+ } else if (score > badness) {
-+ result = sk;
-+ badness = score;
-+ }
-+ }
-+ }
-+
-+ if (result)
-+ sock_hold(result);
-+ read_unlock(&udp_hash_lock);
-+ return result;
-+}
+
+#define related(ct) (ct==(IP_CT_IS_REPLY + IP_CT_RELATED))
+
static unsigned int
target_v1(struct sk_buff **pskb,
const struct net_device *in,
-@@ -44,7 +153,20 @@
+@@ -44,7 +97,20 @@
const void *targinfo)
{
const struct xt_mark_target_info_v1 *markinfo = targinfo;
switch (markinfo->mode) {
case XT_MARK_SET:
-@@ -58,13 +180,121 @@
+@@ -58,13 +124,107 @@
case XT_MARK_OR:
mark = (*pskb)->mark | markinfo->mark;
break;
+
-+ case XT_MARK_COPYXID:
-+ dif = ((struct rtable *)(*pskb)->dst)->rt_iif;
-+
-+ ct = nf_ct_get((*pskb), &ctinfo);
-+ if (!ct)
-+ break;
-+
-+ dir = CTINFO2DIR(ctinfo);
-+ src_ip = ct->tuplehash[dir].tuple.src.u3.ip;
-+ dst_ip = ct->tuplehash[dir].tuple.dst.u3.ip;
-+ src_port = get_src_port(&ct->tuplehash[dir].tuple);
-+ proto = ct->tuplehash[dir].tuple.dst.protonum;
-+
-+ ip = ct->tuplehash[dir].tuple.dst.u3.ip;
-+ port = get_dst_port(&ct->tuplehash[dir].tuple);
-+
-+ if (proto == 1) {
-+ if ((*pskb)->mark>0) /* The packet is marked, it's going out */
-+ {
-+ ct->xid[0]=(*pskb)->mark;
-+ }
-+
-+ if (ct->xid[0] > 0) {
-+ mark = ct->xid[0];
-+ }
-+ }
-+ else if (proto == 17) {
-+ struct sock *sk;
-+ if (!(*pskb)->mark) {
-+ sk = __udp4_lib_lookup(src_ip, src_port, ip, port,
-+ dif, udp_hash);
-+
-+ if (sk && hooknum==NF_IP_LOCAL_IN) {
-+ mark=sk->sk_nid;
-+ }
-+
-+ if (sk) {
-+ sock_put(sk);
-+ }
-+ }
-+ else
-+ if ((*pskb)->mark>0) /* The packet is marked, it's going out */
-+ {
-+ ct->xid[0]=(*pskb)->mark;
-+ }
-+ }
-+ else if (proto == 6) {
-+ if ((*pskb)->sk) {
-+ /* It's a listening socket */
-+ connection_sk = (*pskb)->sk;
-+ sock_hold(connection_sk);
-+ }
-+ else /* It might be a connected socket */
-+ connection_sk = inet_lookup_established(&tcp_hashinfo, src_ip, src_port, ip, port, dif);
-+
-+
-+ if (connection_sk /* Well, some kind of TCP socket */) {
-+ if (connection_sk->sk_peercred.uid == 0 || connection_sk->sk_peercred.uid == (__u32) -1) {
-+ /* Normal case - the peercred on the socket is not set */
-+ connection_sk->sk_peercred.gid = connection_sk->sk_peercred.uid = ct->xid[!dir];
-+ }
-+ else /* Exceptional case - the peercred was set using SET_PEERCRED. Somebody wants us
-+ to mark packets with some arbitrary value.*/
-+ mark=connection_sk->sk_peercred.uid;
-+
-+ /* Has this connection already been tagged? */
-+ if (ct->xid[dir] < 1) {
-+ /* No - let's tag it */
-+ ct->xid[dir]=connection_sk->sk_nid;
-+ }
-+
-+ if (mark==-1 && (connection_sk->sk_nid != 0))
-+ mark = ct->xid[dir];
-+
-+
-+ if (connection_sk->sk_state == TCP_TIME_WAIT) {
-+ inet_twsk_put(inet_twsk(connection_sk));
-+ break;
-+ }
-+ else
-+ sock_put(connection_sk);
-+ }
-+
-+ /* Covers CoDemux case */
-+ if (mark < 1 && (ct->xid[dir]>0)) {
-+ mark = ct->xid[dir];
++ case XT_MARK_COPYXID:
++ dif = ((struct rtable *)(*pskb)->dst)->rt_iif;
++
++ ct = nf_ct_get((*pskb), &ctinfo);
++ if (!ct)
++ break;
++
++ dir = CTINFO2DIR(ctinfo);
++ src_ip = ct->tuplehash[dir].tuple.src.u3.ip;
++ dst_ip = ct->tuplehash[dir].tuple.dst.u3.ip;
++ src_port = get_src_port(&ct->tuplehash[dir].tuple);
++ proto = ct->tuplehash[dir].tuple.dst.protonum;
++
++ ip = ct->tuplehash[dir].tuple.dst.u3.ip;
++ port = get_dst_port(&ct->tuplehash[dir].tuple);
++
++ if (proto == 1 || proto == 17) {
++ if ((*pskb)->mark>0) /* The packet is marked, it's going out */
++ {
++ ct->xid[0]=(*pskb)->mark;
}
-+ if (mark < 1 && (ct->xid[!dir]>0)) {
-+ mark = ct->xid[!dir];
-+ }
-+
-+ /* All else failed. Is this a connection over raw sockets? That explains
-+ * why we couldn't get anything out of skb->sk, or look up a "real" connection.*/
-+ if (ct->xid[dir]<1) {
-+ if ((*pskb)->skb_tag) {
-+ ct->xid[dir]=(*pskb)->skb_tag;
-+ }
-+ }
-+ }
-+ break;
++ if (ct->xid[0] > 0) {
++ mark = ct->xid[0];
++ }
++
++ }
++ else if (proto == 6) /* TCP */{
++ int sockettype=0; /* Established socket */
++ /* Looks for an established socket or a listening socket corresponding to the 4-tuple, in
++ * that order. The order is important for Codemux connections to be handled properly */
++
++ connection_sk = inet_lookup_established(&tcp_hashinfo, src_ip, src_port, ip, port, dif);
++
++ if (!connection_sk) {
++ connection_sk = inet_lookup_listener(&tcp_hashinfo, ip, port, dif);
++ sockettype=1; /* Listening socket */
++ }
++
++ if (connection_sk) {
++ /* The peercred is not set. We set it if the other side has an xid. */
++ if (!PEERCRED_SET(connection_sk->sk_peercred.uid)
++ && ct->xid[!dir]>0 && (sockettype==0)) {
++ connection_sk->sk_peercred.gid = connection_sk->sk_peercred.uid = ct->xid[!dir];
++ }
++
++ /* The peercred is set, and is not equal to the XID of 'the other side' */
++ else if (PEERCRED_SET(connection_sk->sk_peercred.uid) && (connection_sk->sk_peercred.uid != ct->xid[!dir]) && (sockettype==0)) {
++ mark = connection_sk->sk_peercred.uid;
++ }
++
++ /* Has this connection already been tagged? */
++ if (ct->xid[dir] < 1) {
++ /* No - let's tag it */
++ ct->xid[dir]=connection_sk->sk_nid;
++
++ }
++
++ if (mark==-1 && (ct->xid[dir]!= 0))
++ mark = ct->xid[dir];
++
++ if (connection_sk->sk_state == TCP_TIME_WAIT) {
++ inet_twsk_put(inet_twsk(connection_sk));
++ break;
++ }
++ else
++ sock_put(connection_sk);
++ }
++
++ /* All else failed. Is this a connection over raw sockets? That explains
++ * why we couldn't get anything out of skb->sk, or look up a "real" connection.*/
++ if (ct->xid[dir]<1) {
++ if ((*pskb)->skb_tag) {
++ ct->xid[dir]=(*pskb)->skb_tag;
++ }
++ }
++
++ /* Covers CoDemux case */
++ if (mark < 1 && (ct->xid[dir]>0)) {
++ mark = ct->xid[dir];
++ }
++
++ if (mark < 1 && (ct->xid[!dir]>0)) {
++ mark = ct->xid[!dir];
++ }
++ break;
++ }
+ }
+ if (mark != -1) {
(*pskb)->mark = mark;
static int
checkentry_v0(const char *tablename,
const void *entry,
-@@ -92,7 +322,8 @@
+@@ -92,7 +252,8 @@
if (markinfo->mode != XT_MARK_SET
&& markinfo->mode != XT_MARK_AND
git://git.onelab.eu / linux-2.6.git / commitdiff