From: Philip Homburg <philip@cs.vu.nl>
Date: Fri, 30 Sep 2005 12:49:10 +0000 (+0000)
Subject: X expects an implicit bind to INADDR_ANY for UDP sockets.
X-Git-Tag: v3.1.2a~689
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch08.html?a=commitdiff_plain;h=99fa9df34473a65c190cfb3128fb8f7391f078cf;p=minix.git

X expects an implicit bind to INADDR_ANY for UDP sockets.
---

diff --git a/lib/ip/socket.c b/lib/ip/socket.c
index 7900ce341..c08ded1bc 100644
--- a/lib/ip/socket.c
+++ b/lib/ip/socket.c
@@ -2,6 +2,7 @@
 #include <fcntl.h>
 #include <signal.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <sys/socket.h>
 
 #include <net/netlib.h>
@@ -57,7 +58,8 @@ static int _tcp_socket(int protocol)
 
 static int _udp_socket(int protocol)
 {
-	int fd;
+	int r, fd, t_errno;
+	struct sockaddr_in sin;
 
 	if (protocol != 0 && protocol != IPPROTO_UDP)
 	{
@@ -68,6 +70,21 @@ static int _udp_socket(int protocol)
 		return -1;
 	}
 	fd= open(UDP_DEVICE, O_RDWR);
+	if (fd == -1)
+		return fd;
+
+	/* Bind is implict for UDP sockets? */
+	sin.sin_family= AF_INET;
+	sin.sin_addr.s_addr= INADDR_ANY;
+	sin.sin_port= 0;
+	r= bind(fd, (struct sockaddr *)&sin, sizeof(sin));
+	if (r != 0)
+	{
+		t_errno= errno;
+		close(fd);
+		errno= t_errno;
+		return -1;
+	}
 	return fd;
 }