brcm-2.4: potential fix for pptp nat

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15970 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic-2.4/patches/625-netfilter_nat_pptp_fix.patch b/target/linux/generic-2.4/patches/625-netfilter_nat_pptp_fix.patch
new file mode 100644 (file)
index 0000000..c65c961
--- /dev/null
+++ b/target/linux/generic-2.4/patches/625-netfilter_nat_pptp_fix.patch
@@ -0,0 +1,53 @@
+--- a/net/ipv4/netfilter/ip_conntrack_pptp.c
++++ b/net/ipv4/netfilter/ip_conntrack_pptp.c
+@@ -134,12 +134,11 @@ static int pptp_expectfn(struct ip_connt
+ }
+ 
+ /* timeout GRE data connections */
+-static int pptp_timeout_related(struct ip_conntrack *ct)
++static int pptp_timeout_related(struct ip_conntrack *ct, const struct iphdr *iph)
+ {
+       struct list_head *cur_item, *next;
+       struct ip_conntrack_expect *exp;
+       enum ip_conntrack_info ctinfo;
+-      struct iphdr *iph;
+ 
+       /* FIXME: do we have to lock something ? */
+       for (cur_item = ct->sibling_list.next;
+@@ -245,7 +244,8 @@ pptp_inbound_pkt(struct tcphdr *tcph,
+                struct pptp_pkt_hdr *pptph, 
+                size_t datalen,
+                struct ip_conntrack *ct,
+-               enum ip_conntrack_info ctinfo)
++               enum ip_conntrack_info ctinfo,
++               const struct iphdr *iph)
+ {
+       struct PptpControlHeader *ctlh;
+         union pptp_ctrl_union pptpReq;
+@@ -377,7 +377,7 @@ pptp_inbound_pkt(struct tcphdr *tcph,
+               info->cstate = PPTP_CALL_NONE;
+ 
+               /* untrack this call id, unexpect GRE packets */
+-              pptp_timeout_related(ct);
++              pptp_timeout_related(ct, iph);
+               break;
+ 
+       case PPTP_WAN_ERROR_NOTIFY:
+@@ -539,7 +539,7 @@ conntrack_pptp_help(const struct iphdr *
+               info->cstate = PPTP_CALL_NONE;
+ 
+               /* untrack this call id, unexpect GRE packets */
+-              pptp_timeout_related(ct);
++              pptp_timeout_related(ct, iph);
+       }
+ 
+ 
+@@ -571,7 +571,7 @@ conntrack_pptp_help(const struct iphdr *
+               ret = pptp_outbound_pkt(tcph, pptph, datalen, ct, ctinfo);
+       else
+               /* server -> client (PAC -> PNS) */
+-              ret = pptp_inbound_pkt(tcph, pptph, datalen, ct, ctinfo);
++              ret = pptp_inbound_pkt(tcph, pptph, datalen, ct, ctinfo, iph);
+       DEBUGP("sstate: %d->%d, cstate: %d->%d\n",
+               oldsstate, info->sstate, oldcstate, info->cstate);
+       UNLOCK_BH(&ip_pptp_lock);