busybox: 1.13.1 bindtodevice fix

package/busybox/busybox-1.13.1-bindtodevice.patch

@@ -0,0 +1,86 @@
+--- busybox-1.13.1/include/libbb.h	Sun Nov  9 18:28:17 2008
++++ busybox-1.13.1-bindtodevice/include/libbb.h	Wed Dec 10 12:10:30 2008
+@@ -437,6 +437,7 @@
+  * Turn it on before you call bind(). */
+ void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
+ int setsockopt_broadcast(int fd) FAST_FUNC;
++int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
+ /* NB: returns port in host byte order */
+ unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
+ typedef struct len_and_sockaddr {
+--- busybox-1.13.1/libbb/xconnect.c	Sun Nov  9 18:28:09 2008
++++ busybox-1.13.1-bindtodevice/libbb/xconnect.c	Wed Dec 10 23:20:29 2008
+@@ -7,6 +7,7 @@
+  */
+ 
+ #include <netinet/in.h>
++#include <net/if.h>
+ #include "libbb.h"
+ 
+ void FAST_FUNC setsockopt_reuseaddr(int fd)
+@@ -17,6 +18,20 @@
+ {
+ 	return setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &const_int_1, sizeof(const_int_1));
+ }
++int FAST_FUNC setsockopt_bindtodevice(int fd, const char *iface)
++{
++	int r;
++	struct ifreq ifr;
++	strncpy(ifr.ifr_name, iface, IFNAMSIZ);
++	/* Actually, ifr_name is at offset 0, and in practice
++	 * just giving char[IFNAMSIZ] instead of struct ifreq works too.
++	 * But just in case it's not true on some obscure arch... */
++	r = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr));
++	if (r)
++		bb_perror_msg("can't bind to interface %s", iface);
++	return r;
++}
++
+ 
+ void FAST_FUNC xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
+ {
+--- busybox-1.13.1/networking/arping.c	Sun Nov  9 18:27:59 2008
++++ busybox-1.13.1-bindtodevice/networking/arping.c	Wed Dec 10 12:10:30 2008
+@@ -322,8 +322,7 @@
+ 		struct sockaddr_in saddr;
+ 		int probe_fd = xsocket(AF_INET, SOCK_DGRAM, 0);
+ 
+-		if (setsockopt(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device, strlen(device) + 1) == -1)
+-			bb_perror_msg("cannot bind to device %s", device);
++		setsockopt_bindtodevice(probe_fd, device);
+ 		memset(&saddr, 0, sizeof(saddr));
+ 		saddr.sin_family = AF_INET;
+ 		if (src.s_addr) {
+--- busybox-1.13.1/networking/ping.c	Sun Nov  9 18:27:59 2008
++++ busybox-1.13.1-bindtodevice/networking/ping.c	Wed Dec 10 12:10:30 2008
+@@ -572,7 +572,7 @@
+ 		xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
+ 	}
+ 	if (str_I)
+-		setsockopt(pingsock, SOL_SOCKET, SO_BINDTODEVICE, str_I, strlen(str_I) + 1);
++		setsockopt_bindtodevice(pingsock, str_I);
+ 
+ 	/* enable broadcast pings */
+ 	setsockopt_broadcast(pingsock);
+@@ -622,7 +622,7 @@
+ 	if (source_lsa)
+ 		xbind(pingsock, &source_lsa->u.sa, source_lsa->len);
+ 	if (str_I)
+-		setsockopt(pingsock, SOL_SOCKET, SO_BINDTODEVICE, str_I, strlen(str_I) + 1);
++		setsockopt_bindtodevice(pingsock, str_I);
+ 
+ #ifdef ICMP6_FILTER
+ 	{
+--- busybox-1.13.1/networking/udhcp/socket.c	Sun Nov  9 18:27:58 2008
++++ busybox-1.13.1-bindtodevice/networking/udhcp/socket.c	Wed Dec 10 12:10:30 2008
+@@ -98,8 +98,8 @@
+ 		bb_perror_msg_and_die("SO_BROADCAST");
+ 
+ 	/* NB: bug 1032 says this doesn't work on ethernet aliases (ethN:M) */
+-	if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &inf, strlen(inf) + 1) == -1)
+-		bb_perror_msg_and_die("SO_BINDTODEVICE");
++	if (setsockopt_bindtodevice(fd, inf))
++		xfunc_die(); /* warning is already printed */
+ 
+ 	memset(&addr, 0, sizeof(addr));
+ 	addr.sin_family = AF_INET;