projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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> | |
| 20380731 | 19 | #include <net/ip.h> |
| 1da177e4 | 20 | #include <net/sock.h> |
| 1da177e4 | 21 | #include <net/route.h> |
| c752f073 | 22 | #include <net/tcp_states.h> |
| 1da177e4 LT |
23 | |
| 24 | int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) | |
| 25 | { | |
| 26 | struct inet_sock *inet = inet_sk(sk); | |
| 27 | struct sockaddr_in *usin = (struct sockaddr_in *) uaddr; | |
| 28 | struct rtable *rt; | |
| 29 | u32 saddr; | |
| 30 | int oif; | |
| 31 | int err; | |
| 32 | ||
| 33 | ||
| 34 | if (addr_len < sizeof(*usin)) | |
| 35 | return -EINVAL; | |
| 36 | ||
| 37 | if (usin->sin_family != AF_INET) | |
| 38 | return -EAFNOSUPPORT; | |
| 39 | ||
| 40 | sk_dst_reset(sk); | |
| 41 | ||
| 42 | oif = sk->sk_bound_dev_if; | |
| 43 | saddr = inet->saddr; | |
| 44 | if (MULTICAST(usin->sin_addr.s_addr)) { | |
| 45 | if (!oif) | |
| 46 | oif = inet->mc_index; | |
| 47 | if (!saddr) | |
| 48 | saddr = inet->mc_addr; | |
| 49 | } | |
| 50 | err = ip_route_connect(&rt, usin->sin_addr.s_addr, saddr, | |
| 51 | RT_CONN_FLAGS(sk), oif, | |
| 52 | sk->sk_protocol, | |
| 53 | inet->sport, usin->sin_port, sk); | |
| 54 | if (err) | |
| 55 | return err; | |
| 56 | if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) { | |
| 57 | ip_rt_put(rt); | |
| 58 | return -EACCES; | |
| 59 | } | |
| 60 | if (!inet->saddr) | |
| 61 | inet->saddr = rt->rt_src; /* Update source address */ | |
| 62 | if (!inet->rcv_saddr) | |
| 63 | inet->rcv_saddr = rt->rt_src; | |
| 64 | inet->daddr = rt->rt_dst; | |
| 65 | inet->dport = usin->sin_port; | |
| 66 | sk->sk_state = TCP_ESTABLISHED; | |
| 67 | inet->id = jiffies; | |
| 68 | ||
| 69 | sk_dst_set(sk, &rt->u.dst); | |
| 70 | return(0); | |
| 71 | } | |
| 72 | ||
| 73 | EXPORT_SYMBOL(ip4_datagram_connect); | |
| 74 |