X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=net%2Fipv4%2Fnetfilter.c;h=f88347de21a9927a2877b11b0cf31d39979b6763;hb=366e4adc0f9ef33f56c62f980a7d83775e64abd0;hp=52a3d7c579076e8bc7e260534ab4876032cf04af;hpb=bb94aa169eaa6e713a429370d37388722f08666f;p=powerpc.git

diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index 52a3d7c579..f88347de21 100644
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -78,6 +78,47 @@ int ip_route_me_harder(struct sk_buff **pskb)
 }
 EXPORT_SYMBOL(ip_route_me_harder);
 
+#ifdef CONFIG_XFRM
+int ip_xfrm_me_harder(struct sk_buff **pskb)
+{
+	struct flowi fl;
+	unsigned int hh_len;
+	struct dst_entry *dst;
+
+	if (IPCB(*pskb)->flags & IPSKB_XFRM_TRANSFORMED)
+		return 0;
+	if (xfrm_decode_session(*pskb, &fl, AF_INET) < 0)
+		return -1;
+
+	dst = (*pskb)->dst;
+	if (dst->xfrm)
+		dst = ((struct xfrm_dst *)dst)->route;
+	dst_hold(dst);
+
+	if (xfrm_lookup(&dst, &fl, (*pskb)->sk, 0) < 0)
+		return -1;
+
+	dst_release((*pskb)->dst);
+	(*pskb)->dst = dst;
+
+	/* Change in oif may mean change in hh_len. */
+	hh_len = (*pskb)->dst->dev->hard_header_len;
+	if (skb_headroom(*pskb) < hh_len) {
+		struct sk_buff *nskb;
+
+		nskb = skb_realloc_headroom(*pskb, hh_len);
+		if (!nskb)
+			return -1;
+		if ((*pskb)->sk)
+			skb_set_owner_w(nskb, (*pskb)->sk);
+		kfree_skb(*pskb);
+		*pskb = nskb;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(ip_xfrm_me_harder);
+#endif
+
 void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);
 EXPORT_SYMBOL(ip_nat_decode_session);
 
@@ -92,7 +133,7 @@ struct ip_rt_info {
 	u_int8_t tos;
 };
 
-static void queue_save(const struct sk_buff *skb, struct nf_info *info)
+static void nf_ip_saveroute(const struct sk_buff *skb, struct nf_info *info)
 {
 	struct ip_rt_info *rt_info = nf_info_reroute(info);
 
@@ -105,7 +146,7 @@ static void queue_save(const struct sk_buff *skb, struct nf_info *info)
 	}
 }
 
-static int queue_reroute(struct sk_buff **pskb, const struct nf_info *info)
+static int nf_ip_reroute(struct sk_buff **pskb, const struct nf_info *info)
 {
 	const struct ip_rt_info *rt_info = nf_info_reroute(info);
 
@@ -120,21 +161,55 @@ static int queue_reroute(struct sk_buff **pskb, const struct nf_info *info)
 	return 0;
 }
 
-static struct nf_queue_rerouter ip_reroute = {
-	.rer_size	= sizeof(struct ip_rt_info),
-	.save		= queue_save,
-	.reroute	= queue_reroute,
+unsigned int nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
+			    unsigned int dataoff, u_int8_t protocol)
+{
+	struct iphdr *iph = skb->nh.iph;
+	unsigned int csum = 0;
+
+	switch (skb->ip_summed) {
+	case CHECKSUM_COMPLETE:
+		if (hook != NF_IP_PRE_ROUTING && hook != NF_IP_LOCAL_IN)
+			break;
+		if ((protocol == 0 && !(u16)csum_fold(skb->csum)) ||
+		    !csum_tcpudp_magic(iph->saddr, iph->daddr,
+			    	       skb->len - dataoff, protocol,
+				       skb->csum)) {
+			skb->ip_summed = CHECKSUM_UNNECESSARY;
+			break;
+		}
+		/* fall through */
+	case CHECKSUM_NONE:
+		if (protocol == 0)
+			skb->csum = 0;
+		else
+			skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,
+						       skb->len - dataoff,
+						       protocol, 0);
+		csum = __skb_checksum_complete(skb);
+	}
+	return csum;
+}
+
+EXPORT_SYMBOL(nf_ip_checksum);
+
+static struct nf_afinfo nf_ip_afinfo = {
+	.family		= AF_INET,
+	.checksum	= nf_ip_checksum,
+	.saveroute	= nf_ip_saveroute,
+	.reroute	= nf_ip_reroute,
+	.route_key_size	= sizeof(struct ip_rt_info),
 };
 
-static int init(void)
+static int ipv4_netfilter_init(void)
 {
-	return nf_register_queue_rerouter(PF_INET, &ip_reroute);
+	return nf_register_afinfo(&nf_ip_afinfo);
 }
 
-static void fini(void)
+static void ipv4_netfilter_fini(void)
 {
-	nf_unregister_queue_rerouter(PF_INET);
+	nf_unregister_afinfo(&nf_ip_afinfo);
 }
 
-module_init(init);
-module_exit(fini);
+module_init(ipv4_netfilter_init);
+module_exit(ipv4_netfilter_fini);