[SK_BUFF]: Introduce ipv6_hdr(), remove skb->nh.ipv6h

[net-next-2.6.git] / net / dccp / ipv6.c

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 627d0c3c51cf90d0531308087b9ebbb404f3fb46..64eac2515aa2554205534426b5f1cfcf7626931e 100644 (file)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -84,8 +84,8 @@ static inline __u32 secure_dccpv6_sequence_number(__be32 *saddr, __be32 *daddr,
 
 static inline __u32 dccp_v6_init_sequence(struct sk_buff *skb)
 {
-       return secure_dccpv6_sequence_number(skb->nh.ipv6h->daddr.s6_addr32,
-                                            skb->nh.ipv6h->saddr.s6_addr32,
+       return secure_dccpv6_sequence_number(ipv6_hdr(skb)->daddr.s6_addr32,
+                                            ipv6_hdr(skb)->saddr.s6_addr32,
                                             dccp_hdr(skb)->dccph_dport,
                                             dccp_hdr(skb)->dccph_sport     );
 
@@ -313,6 +313,7 @@ static void dccp_v6_reqsk_destructor(struct request_sock *req)
 static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
 {
        struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
+       struct ipv6hdr *rxip6h;
        const u32 dccp_hdr_reset_len = sizeof(struct dccp_hdr) +
                                       sizeof(struct dccp_hdr_ext) +
                                       sizeof(struct dccp_hdr_reset);
@@ -352,12 +353,13 @@ static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
        dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), DCCP_SKB_CB(rxskb)->dccpd_seq);
 
        dccp_csum_outgoing(skb);
-       dh->dccph_checksum = dccp_v6_csum_finish(skb, &rxskb->nh.ipv6h->saddr,
-                                                     &rxskb->nh.ipv6h->daddr);
+       rxip6h = ipv6_hdr(rxskb);
+       dh->dccph_checksum = dccp_v6_csum_finish(skb, &rxip6h->saddr,
+                                                     &rxip6h->daddr);
 
        memset(&fl, 0, sizeof(fl));
-       ipv6_addr_copy(&fl.fl6_dst, &rxskb->nh.ipv6h->saddr);
-       ipv6_addr_copy(&fl.fl6_src, &rxskb->nh.ipv6h->daddr);
+       ipv6_addr_copy(&fl.fl6_dst, &rxip6h->saddr);
+       ipv6_addr_copy(&fl.fl6_src, &rxip6h->daddr);
 
        fl.proto = IPPROTO_DCCP;
        fl.oif = inet6_iif(rxskb);
@@ -390,7 +392,7 @@ static struct request_sock_ops dccp6_request_sock_ops = {
 static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
 {
        const struct dccp_hdr *dh = dccp_hdr(skb);
-       const struct ipv6hdr *iph = skb->nh.ipv6h;
+       const struct ipv6hdr *iph = ipv6_hdr(skb);
        struct sock *nsk;
        struct request_sock **prev;
        /* Find possible connection requests. */
@@ -460,8 +462,8 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
                goto drop_and_free;
 
        ireq6 = inet6_rsk(req);
-       ipv6_addr_copy(&ireq6->rmt_addr, &skb->nh.ipv6h->saddr);
-       ipv6_addr_copy(&ireq6->loc_addr, &skb->nh.ipv6h->daddr);
+       ipv6_addr_copy(&ireq6->rmt_addr, &ipv6_hdr(skb)->saddr);
+       ipv6_addr_copy(&ireq6->loc_addr, &ipv6_hdr(skb)->daddr);
        ireq6->pktopts  = NULL;
 
        if (ipv6_opt_accepted(sk, skb) ||
@@ -546,7 +548,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
                newnp->pktoptions  = NULL;
                newnp->opt         = NULL;
                newnp->mcast_oif   = inet6_iif(skb);
-               newnp->mcast_hops  = skb->nh.ipv6h->hop_limit;
+               newnp->mcast_hops  = ipv6_hdr(skb)->hop_limit;
 
                /*
                 * No need to charge this sock to the relevant IPv6 refcnt debug socks count
@@ -653,7 +655,7 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
        }
        newnp->opt        = NULL;
        newnp->mcast_oif  = inet6_iif(skb);
-       newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
+       newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;
 
        /*
         * Clone native IPv6 options from listening socket (if any)
@@ -826,8 +828,8 @@ static int dccp_v6_rcv(struct sk_buff **pskb)
                goto discard_it;
 
        /* Step 1: If header checksum is incorrect, drop packet and return. */
-       if (dccp_v6_csum_finish(skb, &skb->nh.ipv6h->saddr,
-                                    &skb->nh.ipv6h->daddr)) {
+       if (dccp_v6_csum_finish(skb, &ipv6_hdr(skb)->saddr,
+                                    &ipv6_hdr(skb)->daddr)) {
                DCCP_WARN("dropped packet with invalid checksum\n");
                goto discard_it;
        }
@@ -844,9 +846,9 @@ static int dccp_v6_rcv(struct sk_buff **pskb)
 
        /* Step 2:
         *      Look up flow ID in table and get corresponding socket */
-       sk = __inet6_lookup(&dccp_hashinfo, &skb->nh.ipv6h->saddr,
+       sk = __inet6_lookup(&dccp_hashinfo, &ipv6_hdr(skb)->saddr,
                            dh->dccph_sport,
-                           &skb->nh.ipv6h->daddr, ntohs(dh->dccph_dport),
+                           &ipv6_hdr(skb)->daddr, ntohs(dh->dccph_dport),
                            inet6_iif(skb));
        /*
         * Step 2: