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Diffstat (limited to 'net/ipv4/datagram.c')
-rw-r--r--net/ipv4/datagram.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/net/ipv4/datagram.c b/net/ipv4/datagram.c
new file mode 100644
index 00000000000..b1db561f254
--- /dev/null
+++ b/net/ipv4/datagram.c
@@ -0,0 +1,73 @@
+/*
+ * 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/config.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/in.h>
+#include <net/sock.h>
+#include <net/tcp.h>
+#include <net/route.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;
+ u32 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);
+ if (err)
+ 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);
+