[SK_BUFF]: Introduce ip_hdr(), remove skb->nh.iph

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

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 2ee132b..237880a 100644 (file)
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -158,7 +158,7 @@ DEFINE_SNMP_STAT(struct ipstats_mib, ip_statistics) __read_mostly;
 int ip_call_ra_chain(struct sk_buff *skb)
 {
        struct ip_ra_chain *ra;
-       u8 protocol = skb->nh.iph->protocol;
+       u8 protocol = ip_hdr(skb)->protocol;
        struct sock *last = NULL;
 
        read_lock(&ip_ra_lock);
@@ -171,7 +171,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
                if (sk && inet_sk(sk)->num == protocol &&
                    (!sk->sk_bound_dev_if ||
                     sk->sk_bound_dev_if == skb->dev->ifindex)) {
-                       if (skb->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
+                       if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
                                skb = ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN);
                                if (skb == NULL) {
                                        read_unlock(&ip_ra_lock);
@@ -206,7 +206,7 @@ static inline int ip_local_deliver_finish(struct sk_buff *skb)
        rcu_read_lock();
        {
                /* Note: See raw.c and net/raw.h, RAWV4_HTABLE_SIZE==MAX_INET_PROTOS */
-               int protocol = skb->nh.iph->protocol;
+               int protocol = ip_hdr(skb)->protocol;
                int hash;
                struct sock *raw_sk;
                struct net_protocol *ipprot;
@@ -218,7 +218,7 @@ static inline int ip_local_deliver_finish(struct sk_buff *skb)
                /* If there maybe a raw socket we must check - if not we
                 * don't care less
                 */
-               if (raw_sk && !raw_v4_input(skb, skb->nh.iph, hash))
+               if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash))
                        raw_sk = NULL;
 
                if ((ipprot = rcu_dereference(inet_protos[hash])) != NULL) {
@@ -264,7 +264,7 @@ int ip_local_deliver(struct sk_buff *skb)
         *      Reassemble IP fragments.
         */
 
-       if (skb->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
+       if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
                skb = ip_defrag(skb, IP_DEFRAG_LOCAL_DELIVER);
                if (!skb)
                        return 0;
@@ -292,7 +292,7 @@ static inline int ip_rcv_options(struct sk_buff *skb)
                goto drop;
        }
 
-       iph = skb->nh.iph;
+       iph = ip_hdr(skb);
 
        if (ip_options_compile(NULL, skb)) {
                IP_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
@@ -328,7 +328,7 @@ drop:
 
 static inline int ip_rcv_finish(struct sk_buff *skb)
 {
-       struct iphdr *iph = skb->nh.iph;
+       const struct iphdr *iph = ip_hdr(skb);
 
        /*
         *      Initialise the virtual path cache for the packet. It describes
@@ -389,7 +389,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
        if (!pskb_may_pull(skb, sizeof(struct iphdr)))
                goto inhdr_error;
 
-       iph = skb->nh.iph;
+       iph = ip_hdr(skb);
 
        /*
         *      RFC1122: 3.1.2.2 MUST silently discard any IP frame that fails the checksum.
@@ -408,7 +408,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
        if (!pskb_may_pull(skb, iph->ihl*4))
                goto inhdr_error;
 
-       iph = skb->nh.iph;
+       iph = ip_hdr(skb);
 
        if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
                goto inhdr_error;