blob: 7b068a891953aae4d9e377438319815c3439259b [file] [log] [blame]
* common UDP/RAW code
* Linux INET implementation
* Authors:
* Hideaki YOSHIFUJI <>
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
#include <linux/types.h>
#include <linux/module.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/route.h>
#include <net/tcp_states.h>
int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
struct inet_sock *inet = inet_sk(sk);
struct sockaddr_in *usin = (struct sockaddr_in *) uaddr;
struct rtable *rt;
__be32 saddr;
int oif;
int err;
if (addr_len < sizeof(*usin))
return -EINVAL;
if (usin->sin_family != AF_INET)
oif = sk->sk_bound_dev_if;
saddr = inet->saddr;
if (MULTICAST(usin->sin_addr.s_addr)) {
if (!oif)
oif = inet->mc_index;
if (!saddr)
saddr = inet->mc_addr;
err = ip_route_connect(&rt, usin->sin_addr.s_addr, saddr,
RT_CONN_FLAGS(sk), oif,
inet->sport, usin->sin_port, sk);
if (err)
return err;
if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) {
return -EACCES;
if (!inet->saddr)
inet->saddr = rt->rt_src; /* Update source address */
if (!inet->rcv_saddr)
inet->rcv_saddr = rt->rt_src;
inet->daddr = rt->rt_dst;
inet->dport = usin->sin_port;
sk->sk_state = TCP_ESTABLISHED;
inet->id = jiffies;
sk_dst_set(sk, &rt->u.dst);