From 177f87f0db4a0152270b00265b37465c17949c94 Mon Sep 17 00:00:00 2001
From: Alejandro Mery <amery@geeks.cl>
Date: Mon, 30 Jul 2007 10:16:15 -0400
Subject: [PATCH] 	* improved nl_open() to bind a sockaddr_nl to the
 socket

---
 netlink.c | 18 ++++++++++++++----
 netlink.h |  6 +++++-
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/netlink.c b/netlink.c
index 529b27b..a8296a0 100644
--- a/netlink.c
+++ b/netlink.c
@@ -11,15 +11,25 @@
 
 #include "netlink.h"
 
-#include <sys/socket.h>	// socket()
 #include <unistd.h>	// close()
-
-#include <linux/netlink.h>	// NETLINK_ROUTE
+#include <stdio.h>	// perror()
 
 int nl_open( link_t *self ) {
 	// initialize
 	memset(self, 0x00, sizeof(self));
-	self->fd = socket( AF_NETLINK, SOCK_RAW, NETLINK_ROUTE );
+
+	// open the socket
+	if ( (self->fd = socket( AF_NETLINK, SOCK_RAW, NETLINK_ROUTE )) < 0 ) {
+		perror("socket");
+		return -1;
+	}
+
+	// bind it to the address
+	self->sa.nl_family = AF_NETLINK;
+	if ( bind( self->fd, (const struct sockaddr*) &self->sa, sizeof( self->sa ) ) < 0 ) {
+		perror("bind");
+		close( self->fd );
+	}
 
 	return self->fd;
 }
diff --git a/netlink.h b/netlink.h
index 1fe82cf..fc1ef05 100644
--- a/netlink.h
+++ b/netlink.h
@@ -13,8 +13,12 @@
 #ifndef __NETLINK_H__
 #define __NETLINK_H__
 
+#include <sys/socket.h>	// socket()
+#include <linux/netlink.h>	// struct sockaddr_nl
+
 typedef struct {
-	int fd;
+	int			fd;
+	struct sockaddr_nl	sa;
 	} link_t;
 
 int nl_open( link_t *self );
-- 
2.11.4.GIT