Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *      common UDP/RAW code

 *      Linux INET implementation

 *

 * Authors:

 *      Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>

 *

 *      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)

                return -EAFNOSUPPORT;

        sk_dst_reset(sk);

        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,

                               sk->sk_protocol,

                               inet->sport, usin->sin_port, sk, 1);

        if (err) {

                if (err == -ENETUNREACH)

                        IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);

                return err;

        }

        if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) {

                ip_rt_put(rt);

                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);

        return(0);

}

EXPORT_SYMBOL(ip4_datagram_connect);