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

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

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 1bbf551..b4cad50 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -867,7 +867,7 @@ try_again:
        {
                sin->sin_family = AF_INET;
                sin->sin_port = skb->h.uh->source;
-               sin->sin_addr.s_addr = skb->nh.iph->saddr;
+               sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
                memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
        }
        if (inet->cmsg_flags)
@@ -990,7 +990,7 @@ static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb)
                return 0;
 
        /* Now we can update and verify the packet length... */
-       iph = skb->nh.iph;
+       iph = ip_hdr(skb);
        iphlen = iph->ihl << 2;
        iph->tot_len = htons(ntohs(iph->tot_len) - len);
        if (skb->len < iphlen + len) {
@@ -1168,6 +1168,7 @@ static int __udp4_lib_mcast_deliver(struct sk_buff *skb,
 static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,
                                 int proto)
 {
+       const struct iphdr *iph;
        int err;
 
        UDP_SKB_CB(skb)->partial_cov = 0;
@@ -1179,16 +1180,16 @@ static inline int udp4_csum_init(struct sk_buff *skb, struct udphdr *uh,
                        return err;
        }
 
+       iph = ip_hdr(skb);
        if (uh->check == 0) {
                skb->ip_summed = CHECKSUM_UNNECESSARY;
        } else if (skb->ip_summed == CHECKSUM_COMPLETE) {
-              if (!csum_tcpudp_magic(skb->nh.iph->saddr, skb->nh.iph->daddr,
-                                     skb->len, proto, skb->csum))
+              if (!csum_tcpudp_magic(iph->saddr, iph->daddr, skb->len,
+                                     proto, skb->csum))
                        skb->ip_summed = CHECKSUM_UNNECESSARY;
        }
        if (skb->ip_summed != CHECKSUM_UNNECESSARY)
-               skb->csum = csum_tcpudp_nofold(skb->nh.iph->saddr,
-                                              skb->nh.iph->daddr,
+               skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr,
                                               skb->len, proto, 0);
        /* Probably, we should checksum udp header (it should be in cache
         * in any case) and data in tiny packets (< rx copybreak).
@@ -1208,8 +1209,8 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
        struct udphdr *uh = skb->h.uh;
        unsigned short ulen;
        struct rtable *rt = (struct rtable*)skb->dst;
-       __be32 saddr = skb->nh.iph->saddr;
-       __be32 daddr = skb->nh.iph->daddr;
+       __be32 saddr = ip_hdr(skb)->saddr;
+       __be32 daddr = ip_hdr(skb)->daddr;
 
        /*
         *  Validate the packet.