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Commit de3c7a18 authored by James Chapman's avatar James Chapman Committed by David S. Miller
Browse files

l2tp: Use ip4_datagram_connect() in l2tp_ip_connect() 



Cleanup the l2tp_ip code to make use of an existing ipv4 support function.

Signed-off-by: default avatarJames Chapman <jchapman@katalix.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5de7aee5

net/l2tp/l2tp_ip.c

+7 −47
Original line number Diff line number Diff line
@@ -299,67 +299,27 @@ static int l2tp_ip_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len 
{

	struct sockaddr_l2tpip *lsa = (struct sockaddr_l2tpip *) uaddr;

	struct inet_sock *inet = inet_sk(sk);

	struct flowi4 *fl4;

	struct rtable *rt;

	__be32 saddr;

	int oif, rc;

	int rc;



	rc = -EINVAL;

	if (addr_len < sizeof(*lsa))

		goto out;



	rc = -EAFNOSUPPORT;

	if (lsa->l2tp_family != AF_INET)

		goto out;

		return -EINVAL;



	lock_sock(sk);



	sk_dst_reset(sk);



	oif = sk->sk_bound_dev_if;

	saddr = inet->inet_saddr;



	rc = -EINVAL;

	if (ipv4_is_multicast(lsa->l2tp_addr.s_addr))

		goto out;

		return -EINVAL;



	fl4 = &inet->cork.fl.u.ip4;

	rt = ip_route_connect(fl4, lsa->l2tp_addr.s_addr, saddr,

			      RT_CONN_FLAGS(sk), oif,

			      IPPROTO_L2TP,

			      0, 0, sk, true);

	if (IS_ERR(rt)) {

		rc = PTR_ERR(rt);

		if (rc == -ENETUNREACH)

			IP_INC_STATS_BH(&init_net, IPSTATS_MIB_OUTNOROUTES);

		goto out;

	}

	rc = ip4_datagram_connect(sk, uaddr, addr_len);

	if (rc < 0)

		return rc;



	rc = -ENETUNREACH;

	if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {

		ip_rt_put(rt);

		goto out;

	}

	lock_sock(sk);



	l2tp_ip_sk(sk)->peer_conn_id = lsa->l2tp_conn_id;



	if (!inet->inet_saddr)

		inet->inet_saddr = fl4->saddr;

	if (!inet->inet_rcv_saddr)

		inet->inet_rcv_saddr = fl4->saddr;

	inet->inet_daddr = fl4->daddr;

	sk->sk_state = TCP_ESTABLISHED;

	inet->inet_id = jiffies;



	sk_dst_set(sk, &rt->dst);



	write_lock_bh(&l2tp_ip_lock);

	hlist_del_init(&sk->sk_bind_node);

	sk_add_bind_node(sk, &l2tp_ip_bind_table);

	write_unlock_bh(&l2tp_ip_lock);



	rc = 0;

out:

	release_sock(sk);

	return rc;

}