[IPV6]: Support several new sockopt / ancillary data in Advanced API (RFC3542).

Support several new socket options / ancillary data:
  IPV6_RECVPKTINFO, IPV6_PKTINFO,
  IPV6_RECVHOPOPTS, IPV6_HOPOPTS,
  IPV6_RECVDSTOPTS, IPV6_DSTOPTS, IPV6_RTHDRDSTOPTS,
  IPV6_RECVRTHDR, IPV6_RTHDR,
  IPV6_RECVHOPOPTS, IPV6_HOPOPTS

Old semantics are preserved as IPV6_2292xxxx so that
we can maintain backward compatibility.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 10 insertions, 11 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 794734f1d230..246414b27d0e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -849,7 +849,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
         if (dst == NULL) {
                 opt = np->opt;
                 if (opt == NULL &&
-                    np->rxopt.bits.srcrt == 2 &&
+                    np->rxopt.bits.osrcrt == 2 &&
                     treq->pktopts) {
                         struct sk_buff *pktopts = treq->pktopts;
                         struct inet6_skb_parm *rxopt = IP6CB(pktopts);
@@ -915,11 +915,10 @@ static int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
         struct inet6_skb_parm *opt = IP6CB(skb);
 
         if (np->rxopt.all) {
-                if ((opt->hop && np->rxopt.bits.hopopts) ||
-                    ((IPV6_FLOWINFO_MASK&*(u32*)skb->nh.raw) &&
-                     np->rxopt.bits.rxflow) ||
-                    (opt->srcrt && np->rxopt.bits.srcrt) ||
-                    ((opt->dst1 || opt->dst0) && np->rxopt.bits.dstopts))
+                if ((opt->hop && (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
+                    ((IPV6_FLOWINFO_MASK & *(u32*)skb->nh.raw) && np->rxopt.bits.rxflow) ||
+                    (opt->srcrt && (np->rxopt.bits.srcrt || np->rxopt.bits.osrcrt)) ||
+                    ((opt->dst1 || opt->dst0) && (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
                         return 1;
         }
         return 0;
@@ -1190,8 +1189,8 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
         TCP_ECN_create_request(req, skb->h.th);
         treq->pktopts = NULL;
         if (ipv6_opt_accepted(sk, skb) ||
-            np->rxopt.bits.rxinfo ||
-            np->rxopt.bits.rxhlim) {
+            np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
+            np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
                 atomic_inc(&skb->users);
                 treq->pktopts = skb;
         }
@@ -1288,7 +1287,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
         if (sk_acceptq_is_full(sk))
                 goto out_overflow;
 
-        if (np->rxopt.bits.srcrt == 2 &&
+        if (np->rxopt.bits.osrcrt == 2 &&
             opt == NULL && treq->pktopts) {
                 struct inet6_skb_parm *rxopt = IP6CB(treq->pktopts);
                 if (rxopt->srcrt)
@@ -1544,9 +1543,9 @@ ipv6_pktoptions:
         tp = tcp_sk(sk);
         if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt &&
             !((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
-                if (np->rxopt.bits.rxinfo)
+                if (np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo)
                         np->mcast_oif = inet6_iif(opt_skb);
-                if (np->rxopt.bits.rxhlim)
+                if (np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim)
                         np->mcast_hops = opt_skb->nh.ipv6h->hop_limit;
                 if (ipv6_opt_accepted(sk, opt_skb)) {
                         skb_set_owner_r(opt_skb, sk);