[TCP]: tcp probe add back ssthresh field

[linux.git] / net / ipv4 / netfilter.c

diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
index c47ce7076bd55fd66b4688d2d081daa9c2a3aca2..b44192924f95fed17389482bb8ef47ed6275c2ab 100644 (file)
--- a/net/ipv4/netfilter.c
+++ b/net/ipv4/netfilter.c
@@ -10,7 +10,7 @@
 /* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
 int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type)
 {
-       struct iphdr *iph = (*pskb)->nh.iph;
+       const struct iphdr *iph = ip_hdr(*pskb);
        struct rtable *rt;
        struct flowi fl = {};
        struct dst_entry *odst;
@@ -53,7 +53,7 @@ int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type)
                dst_release(&rt->u.dst);
                dst_release(odst);
        }
-       
+
        if ((*pskb)->dst->error)
                return -1;
 
@@ -70,7 +70,7 @@ int ip_route_me_harder(struct sk_buff **pskb, unsigned addr_type)
                struct sk_buff *nskb;
 
                nskb = skb_realloc_headroom(*pskb, hh_len);
-               if (!nskb) 
+               if (!nskb)
                        return -1;
                if ((*pskb)->sk)
                        skb_set_owner_w(nskb, (*pskb)->sk);
@@ -142,7 +142,7 @@ static void nf_ip_saveroute(const struct sk_buff *skb, struct nf_info *info)
        struct ip_rt_info *rt_info = nf_info_reroute(info);
 
        if (info->hook == NF_IP_LOCAL_OUT) {
-               const struct iphdr *iph = skb->nh.iph;
+               const struct iphdr *iph = ip_hdr(skb);
 
                rt_info->tos = iph->tos;
                rt_info->daddr = iph->daddr;
@@ -155,7 +155,7 @@ 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);
 
        if (info->hook == NF_IP_LOCAL_OUT) {
-               struct iphdr *iph = (*pskb)->nh.iph;
+               const struct iphdr *iph = ip_hdr(*pskb);
 
                if (!(iph->tos == rt_info->tos
                      && iph->daddr == rt_info->daddr
@@ -168,7 +168,7 @@ static int nf_ip_reroute(struct sk_buff **pskb, const struct nf_info *info)
 __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
                            unsigned int dataoff, u_int8_t protocol)
 {
-       struct iphdr *iph = skb->nh.iph;
+       const struct iphdr *iph = ip_hdr(skb);
        __sum16 csum = 0;
 
        switch (skb->ip_summed) {
@@ -177,7 +177,7 @@ __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
                        break;
                if ((protocol == 0 && !csum_fold(skb->csum)) ||
                    !csum_tcpudp_magic(iph->saddr, iph->daddr,
-                                      skb->len - dataoff, protocol,
+                                      skb->len - dataoff, protocol,
                                       skb->csum)) {
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
                        break;