ipv6: Create inet6_csk_route_req().
David S. Miller [Thu, 2 Dec 2010 18:59:22 +0000 (10:59 -0800)]
Brother of ipv4's inet_csk_route_req().

Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/inet6_connection_sock.h
net/ipv6/inet6_connection_sock.c

index aae08f6..ff01350 100644 (file)
@@ -25,6 +25,9 @@ struct sockaddr;
 extern int inet6_csk_bind_conflict(const struct sock *sk,
                                   const struct inet_bind_bucket *tb);
 
+extern struct dst_entry* inet6_csk_route_req(struct sock *sk,
+                                            const struct request_sock *req);
+
 extern struct request_sock *inet6_csk_search_req(const struct sock *sk,
                                                 struct request_sock ***prevp,
                                                 const __be16 rport,
index 861d252..e46305d 100644 (file)
@@ -54,6 +54,38 @@ int inet6_csk_bind_conflict(const struct sock *sk,
 
 EXPORT_SYMBOL_GPL(inet6_csk_bind_conflict);
 
+struct dst_entry *inet6_csk_route_req(struct sock *sk,
+                                     const struct request_sock *req)
+{
+       struct inet6_request_sock *treq = inet6_rsk(req);
+       struct ipv6_pinfo *np = inet6_sk(sk);
+       struct in6_addr *final_p, final;
+       struct dst_entry *dst;
+       struct flowi fl;
+
+       memset(&fl, 0, sizeof(fl));
+       fl.proto = IPPROTO_TCP;
+       ipv6_addr_copy(&fl.fl6_dst, &treq->rmt_addr);
+       final_p = fl6_update_dst(&fl, np->opt, &final);
+       ipv6_addr_copy(&fl.fl6_src, &treq->loc_addr);
+       fl.oif = sk->sk_bound_dev_if;
+       fl.mark = sk->sk_mark;
+       fl.fl_ip_dport = inet_rsk(req)->rmt_port;
+       fl.fl_ip_sport = inet_rsk(req)->loc_port;
+       security_req_classify_flow(req, &fl);
+
+       if (ip6_dst_lookup(sk, &dst, &fl))
+               return NULL;
+
+       if (final_p)
+               ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+       if ((xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0)
+               return NULL;
+
+       return dst;
+}
+
 /*
  * request_sock (formerly open request) hash tables.
  */