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);
+