Openwrt/openwrt/package/busybox/patches/110-telnetd.patch

diff -ruN busybox-1.2.0-old/networking/telnetd.c busybox-1.2.0-new/networking/telnetd.c
--- busybox-1.2.0-old/networking/telnetd.c	2006-07-01 00:42:02.000000000 +0200
+++ busybox-1.2.0-new/networking/telnetd.c	2006-07-31 10:52:30.000000000 +0200
@@ -44,6 +44,7 @@
 #include <arpa/telnet.h>
 #include <ctype.h>
 #include <sys/syslog.h>
+#include <net/if.h>
 
 #include "busybox.h"
 
@@ -391,11 +392,13 @@
 	struct in_addr bind_addr = { .s_addr = 0x0 };
 #endif /* CONFIG_FEATURE_TELNETD_INETD */
 	int c;
+	char *interface_name = NULL;
+	struct ifreq interface;
 	static const char options[] =
 #ifdef CONFIG_FEATURE_TELNETD_INETD
-		"f:l:";
+		"i:f:l:";
 #else /* CONFIG_EATURE_TELNETD_INETD */
-		"f:l:p:b:";
+		"i:f:l:p:b:";
 #endif /* CONFIG_FEATURE_TELNETD_INETD */
 	int maxlen, w, r;
 
@@ -410,6 +413,9 @@
 			case 'f':
 				issuefile = optarg;
 				break;
+			case 'i':
+				interface_name = strdup(optarg);
+				break;
 			case 'l':
 				loginpath = optarg;
 				break;
@@ -459,6 +465,13 @@
 	sa.sin_addr = bind_addr;
 #endif
 
+ 	/* Set it to listen on the specified interface */
+ 	if (interface_name) {
+ 		strncpy(interface.ifr_ifrn.ifrn_name, interface_name, IFNAMSIZ);
+ 		(void)setsockopt(master_fd, SOL_SOCKET,
+ 				SO_BINDTODEVICE, &interface, sizeof(interface));
+ 	}
+ 
 	bb_xbind(master_fd, (struct sockaddr *) &sa, sizeof(sa));
 	bb_xlisten(master_fd, 1);
 	bb_xdaemon(0, 0);