[IPV6]: Generalise some functions

Using sk->sk_protocol instead of IPPROTO_TCP.

Will be used by DCCPv6 in the next changesets.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 103 insertions, 0 deletions

diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c
index fe874eeaa40c..792f90f0f9ec 100644
--- a/net/ipv6/inet6_connection_sock.c
+++ b/net/ipv6/inet6_connection_sock.c
@@ -21,8 +21,34 @@
 
 #include <net/addrconf.h>
 #include <net/inet_connection_sock.h>
+#include <net/inet_ecn.h>
+#include <net/inet_hashtables.h>
+#include <net/ip6_route.h>
 #include <net/sock.h>
 
+int inet6_csk_bind_conflict(const struct sock *sk,
+			    const struct inet_bind_bucket *tb)
+{
+	const struct sock *sk2;
+	const struct hlist_node *node;
+
+	/* We must walk the whole port owner list in this case. -DaveM */
+	sk_for_each_bound(sk2, node, &tb->owners) {
+		if (sk != sk2 &&
+		    (!sk->sk_bound_dev_if ||
+		     !sk2->sk_bound_dev_if ||
+		     sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&
+		    (!sk->sk_reuse || !sk2->sk_reuse ||
+		     sk2->sk_state == TCP_LISTEN) &&
+		     ipv6_rcv_saddr_equal(sk, sk2))
+			break;
+	}
+
+	return node != NULL;
+}
+
+EXPORT_SYMBOL_GPL(inet6_csk_bind_conflict);
+
 /*
  * request_sock (formerly open request) hash tables.
  */
@@ -94,3 +120,80 @@ void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
 }
 
 EXPORT_SYMBOL_GPL(inet6_csk_reqsk_queue_hash_add);
+
+void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr)
+{
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) uaddr;
+
+	sin6->sin6_family = AF_INET6;
+	ipv6_addr_copy(&sin6->sin6_addr, &np->daddr);
+	sin6->sin6_port	= inet_sk(sk)->dport;
+	/* We do not store received flowlabel for TCP */
+	sin6->sin6_flowinfo = 0;
+	sin6->sin6_scope_id = 0;
+	if (sk->sk_bound_dev_if &&
+	    ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+		sin6->sin6_scope_id = sk->sk_bound_dev_if;
+}
+
+EXPORT_SYMBOL_GPL(inet6_csk_addr2sockaddr);
+
+int inet6_csk_xmit(struct sk_buff *skb, int ipfragok)
+{
+	struct sock *sk = skb->sk;
+	struct inet_sock *inet = inet_sk(sk);
+	struct ipv6_pinfo *np = inet6_sk(sk);
+	struct flowi fl;
+	struct dst_entry *dst;
+	struct in6_addr *final_p = NULL, final;
+
+	memset(&fl, 0, sizeof(fl));
+	fl.proto = sk->sk_protocol;
+	ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
+	ipv6_addr_copy(&fl.fl6_src, &np->saddr);
+	fl.fl6_flowlabel = np->flow_label;
+	IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel);
+	fl.oif = sk->sk_bound_dev_if;
+	fl.fl_ip_sport = inet->sport;
+	fl.fl_ip_dport = inet->dport;
+
+	if (np->opt && np->opt->srcrt) {
+		struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
+		ipv6_addr_copy(&final, &fl.fl6_dst);
+		ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+		final_p = &final;
+	}
+
+	dst = __sk_dst_check(sk, np->dst_cookie);
+
+	if (dst == NULL) {
+		int err = ip6_dst_lookup(sk, &dst, &fl);
+
+		if (err) {
+			sk->sk_err_soft = -err;
+			return err;
+		}
+
+		if (final_p)
+			ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+		if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
+			sk->sk_route_caps = 0;
+			return err;
+		}
+
+		ip6_dst_store(sk, dst, NULL);
+		sk->sk_route_caps = dst->dev->features &
+			~(NETIF_F_IP_CSUM | NETIF_F_TSO);
+	}
+
+	skb->dst = dst_clone(dst);
+
+	/* Restore final destination back after routing done */
+	ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
+
+	return ip6_xmit(sk, skb, &fl, np->opt, 0);
+}
+
+EXPORT_SYMBOL_GPL(inet6_csk_xmit);