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

[safe/jmp/linux-2.6] / net / ipv4 / xfrm4_input.c

diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index d89969c..5ceca95 100644 (file)
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -28,7 +28,7 @@ static int xfrm4_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32
        switch (nexthdr) {
        case IPPROTO_IPIP:
        case IPPROTO_IPV6:
-               *spi = skb->nh.iph->saddr;
+               *spi = ip_hdr(skb)->saddr;
                *seq = 0;
                return 0;
        }
@@ -39,9 +39,9 @@ static int xfrm4_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32
 #ifdef CONFIG_NETFILTER
 static inline int xfrm4_rcv_encap_finish(struct sk_buff *skb)
 {
-       struct iphdr *iph = skb->nh.iph;
-
        if (skb->dst == NULL) {
+               const struct iphdr *iph = ip_hdr(skb);
+
                if (ip_route_input(skb, iph->daddr, iph->saddr, iph->tos,
                                   skb->dev))
                        goto drop;
@@ -55,18 +55,18 @@ drop:
 
 int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
 {
-       int err;
        __be32 spi, seq;
        struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
        struct xfrm_state *x;
        int xfrm_nr = 0;
        int decaps = 0;
+       int err = xfrm4_parse_spi(skb, ip_hdr(skb)->protocol, &spi, &seq);
 
-       if ((err = xfrm4_parse_spi(skb, skb->nh.iph->protocol, &spi, &seq)) != 0)
+       if (err != 0)
                goto drop;
 
        do {
-               struct iphdr *iph = skb->nh.iph;
+               const struct iphdr *iph = ip_hdr(skb);
 
                if (xfrm_nr == XFRM_MAX_DEPTH)
                        goto drop;
@@ -113,7 +113,8 @@ int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
                        break;
                }
 
-               if ((err = xfrm_parse_spi(skb, skb->nh.iph->protocol, &spi, &seq)) < 0)
+               err = xfrm_parse_spi(skb, ip_hdr(skb)->protocol, &spi, &seq);
+               if (err < 0)
                        goto drop;
        } while (!err);
 
@@ -147,14 +148,14 @@ int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
        } else {
 #ifdef CONFIG_NETFILTER
                __skb_push(skb, skb->data - skb_network_header(skb));
-               skb->nh.iph->tot_len = htons(skb->len);
-               ip_send_check(skb->nh.iph);
+               ip_hdr(skb)->tot_len = htons(skb->len);
+               ip_send_check(ip_hdr(skb));
 
                NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
                        xfrm4_rcv_encap_finish);
                return 0;
 #else
-               return -skb->nh.iph->protocol;
+               return -ip_hdr(skb)->protocol;
 #endif
        }