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

diff -ur busybox-1.1.0/networking/telnetd.c busybox-1.1.0-owrt/networking/telnetd.c
--- busybox-1.1.0/networking/telnetd.c	2006-01-11 06:43:51.000000000 +0100
+++ busybox-1.1.0-owrt/networking/telnetd.c	2006-01-14 17:41:20.000000000 +0100
@@ -45,6 +45,7 @@
 #include <arpa/telnet.h>
 #include <ctype.h>
 #include <sys/syslog.h>
+#include <net/if.h>
 
 #include "busybox.h"
 
@@ -394,11 +395,13 @@
 	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;
 
@@ -413,6 +416,9 @@
 			case 'f':
 				issuefile = optarg;
 				break;
+			case 'i':
+				interface_name = strdup(optarg);
+				break;
 			case 'l':
 				loginpath = optarg;
 				break;
@@ -465,6 +471,13 @@
 	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));
+	}
+
 	if (bind(master_fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
 		bb_perror_msg_and_die("bind");
 	}