Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * common UDP/RAW code |
| 3 | * Linux INET implementation |
| 4 | * |
| 5 | * Authors: |
| 6 | * Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/config.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/ip.h> |
| 18 | #include <linux/in.h> |
| 19 | #include <net/sock.h> |
| 20 | #include <net/tcp.h> |
| 21 | #include <net/route.h> |
| 22 | |
| 23 | int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
| 24 | { |
| 25 | struct inet_sock *inet = inet_sk(sk); |
| 26 | struct sockaddr_in *usin = (struct sockaddr_in *) uaddr; |
| 27 | struct rtable *rt; |
| 28 | u32 saddr; |
| 29 | int oif; |
| 30 | int err; |
| 31 | |
| 32 | |
| 33 | if (addr_len < sizeof(*usin)) |
| 34 | return -EINVAL; |
| 35 | |
| 36 | if (usin->sin_family != AF_INET) |
| 37 | return -EAFNOSUPPORT; |
| 38 | |
| 39 | sk_dst_reset(sk); |
| 40 | |
| 41 | oif = sk->sk_bound_dev_if; |
| 42 | saddr = inet->saddr; |
| 43 | if (MULTICAST(usin->sin_addr.s_addr)) { |
| 44 | if (!oif) |
| 45 | oif = inet->mc_index; |
| 46 | if (!saddr) |
| 47 | saddr = inet->mc_addr; |
| 48 | } |
| 49 | err = ip_route_connect(&rt, usin->sin_addr.s_addr, saddr, |
| 50 | RT_CONN_FLAGS(sk), oif, |
| 51 | sk->sk_protocol, |
| 52 | inet->sport, usin->sin_port, sk); |
| 53 | if (err) |
| 54 | return err; |
| 55 | if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) { |
| 56 | ip_rt_put(rt); |
| 57 | return -EACCES; |
| 58 | } |
| 59 | if (!inet->saddr) |
| 60 | inet->saddr = rt->rt_src; /* Update source address */ |
| 61 | if (!inet->rcv_saddr) |
| 62 | inet->rcv_saddr = rt->rt_src; |
| 63 | inet->daddr = rt->rt_dst; |
| 64 | inet->dport = usin->sin_port; |
| 65 | sk->sk_state = TCP_ESTABLISHED; |
| 66 | inet->id = jiffies; |
| 67 | |
| 68 | sk_dst_set(sk, &rt->u.dst); |
| 69 | return(0); |
| 70 | } |
| 71 | |
| 72 | EXPORT_SYMBOL(ip4_datagram_connect); |
| 73 | |