[NETFILTER]: nf_nat: add DCCP protocol support

[safe/jmp/linux-2.6] / net / ipv4 / netfilter.c

diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index f716608..f8edacd 100644 (file)
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -19,7 +19,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
        unsigned int hh_len;
        unsigned int type;
 
-       type = inet_addr_type(iph->saddr);
+       type = inet_addr_type(&init_net, iph->saddr);
        if (addr_type == RTN_UNSPEC)
                addr_type = type;
 
@@ -33,7 +33,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
                fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
                fl.oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;
                fl.mark = skb->mark;
-               if (ip_route_output_key(&rt, &fl) != 0)
+               if (ip_route_output_key(&init_net, &rt, &fl) != 0)
                        return -1;
 
                /* Drop old route. */
@@ -43,7 +43,7 @@ int ip_route_me_harder(struct sk_buff *skb, unsigned addr_type)
                /* non-local src, find valid iif to satisfy
                 * rp-filter when calling ip_route_input. */
                fl.nl_u.ip4_u.daddr = iph->saddr;
-               if (ip_route_output_key(&rt, &fl) != 0)
+               if (ip_route_output_key(&init_net, &rt, &fl) != 0)
                        return -1;
 
                odst = skb->dst;
@@ -123,11 +123,12 @@ struct ip_rt_info {
        u_int8_t tos;
 };
 
-static void nf_ip_saveroute(const struct sk_buff *skb, struct nf_info *info)
+static void nf_ip_saveroute(const struct sk_buff *skb,
+                           struct nf_queue_entry *entry)
 {
-       struct ip_rt_info *rt_info = nf_info_reroute(info);
+       struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry);
 
-       if (info->hook == NF_INET_LOCAL_OUT) {
+       if (entry->hook == NF_INET_LOCAL_OUT) {
                const struct iphdr *iph = ip_hdr(skb);
 
                rt_info->tos = iph->tos;
@@ -136,11 +137,12 @@ static void nf_ip_saveroute(const struct sk_buff *skb, struct nf_info *info)
        }
 }
 
-static int nf_ip_reroute(struct sk_buff *skb, const struct nf_info *info)
+static int nf_ip_reroute(struct sk_buff *skb,
+                        const struct nf_queue_entry *entry)
 {
-       const struct ip_rt_info *rt_info = nf_info_reroute(info);
+       const struct ip_rt_info *rt_info = nf_queue_entry_reroute(entry);
 
-       if (info->hook == NF_INET_LOCAL_OUT) {
+       if (entry->hook == NF_INET_LOCAL_OUT) {
                const struct iphdr *iph = ip_hdr(skb);
 
                if (!(iph->tos == rt_info->tos
@@ -180,21 +182,44 @@ __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
        }
        return csum;
 }
-
 EXPORT_SYMBOL(nf_ip_checksum);
 
+static __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook,
+                                     unsigned int dataoff, unsigned int len,
+                                     u_int8_t protocol)
+{
+       const struct iphdr *iph = ip_hdr(skb);
+       __sum16 csum = 0;
+
+       switch (skb->ip_summed) {
+       case CHECKSUM_COMPLETE:
+               if (len == skb->len - dataoff)
+                       return nf_ip_checksum(skb, hook, dataoff, protocol);
+               /* fall through */
+       case CHECKSUM_NONE:
+               skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, protocol,
+                                              skb->len - dataoff, 0);
+               skb->ip_summed = CHECKSUM_NONE;
+               csum = __skb_checksum_complete_head(skb, dataoff + len);
+               if (!csum)
+                       skb->ip_summed = CHECKSUM_UNNECESSARY;
+       }
+       return csum;
+}
+
 static int nf_ip_route(struct dst_entry **dst, struct flowi *fl)
 {
-       return ip_route_output_key((struct rtable **)dst, fl);
+       return ip_route_output_key(&init_net, (struct rtable **)dst, fl);
 }
 
-static struct nf_afinfo nf_ip_afinfo = {
-       .family         = AF_INET,
-       .checksum       = nf_ip_checksum,
-       .route          = nf_ip_route,
-       .saveroute      = nf_ip_saveroute,
-       .reroute        = nf_ip_reroute,
-       .route_key_size = sizeof(struct ip_rt_info),
+static const struct nf_afinfo nf_ip_afinfo = {
+       .family                 = AF_INET,
+       .checksum               = nf_ip_checksum,
+       .checksum_partial       = nf_ip_checksum_partial,
+       .route                  = nf_ip_route,
+       .saveroute              = nf_ip_saveroute,
+       .reroute                = nf_ip_reroute,
+       .route_key_size         = sizeof(struct ip_rt_info),
 };
 
 static int ipv4_netfilter_init(void)
@@ -209,3 +234,13 @@ static void ipv4_netfilter_fini(void)
 
 module_init(ipv4_netfilter_init);
 module_exit(ipv4_netfilter_fini);
+
+#ifdef CONFIG_SYSCTL
+struct ctl_path nf_net_ipv4_netfilter_sysctl_path[] = {
+       { .procname = "net", .ctl_name = CTL_NET, },
+       { .procname = "ipv4", .ctl_name = NET_IPV4, },
+       { .procname = "netfilter", .ctl_name = NET_IPV4_NETFILTER, },
+       { }
+};
+EXPORT_SYMBOL_GPL(nf_net_ipv4_netfilter_sysctl_path);
+#endif /* CONFIG_SYSCTL */