--- netkit-telnet-0.17/telnetd/telnetd.c.orig	2011-01-31 12:05:37.942942871 -0600

+++ netkit-telnet-0.17/telnetd/telnetd.c	2011-01-31 18:20:22.400743499 -0600

@@ -82,6 +82,7 @@ char	ptyibuf2[BUFSIZ];

 int	hostinfo = 1;			/* do we print login banner? */

 int debug = 0;

+int debugsix = 0;

 int keepalive = 1;

 char *loginprg = _PATH_LOGIN;

 char *progname;

@@ -150,8 +151,11 @@ main(int argc, char *argv[], char *env[]

 #endif /* BFTPDAEMON */

 		case 'd':

-			if (strcmp(optarg, "ebug") == 0) {

+			if (strncmp(optarg, "ebug", 4) == 0) {

 				debug++;

+				if (strncmp(optarg, "ebug6", 5) == 0) {

+					debugsix++;

+				}

 				break;

 			}

 			usage();

@@ -271,6 +275,8 @@ main(int argc, char *argv[], char *env[]

 	        hints.ai_socktype = SOCK_STREAM;

 	        hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;

 	        hints.ai_protocol = IPPROTO_TCP;

+		if (debugsix)

+			hints.ai_family = AF_INET6;

 	        if (argc == 0) {

 	            if (getaddrinfo(NULL, "telnet", &hints, &ai) != 0) {

@@ -380,12 +386,12 @@ usage(void)

 {

 	fprintf(stderr, "Usage: telnetd");

 #ifdef	AUTHENTICATE

-	fprintf(stderr, " [-a (debug|other|user|valid|off)]\n\t");

+	fprintf(stderr, " [-a (debug|debug6|other|user|valid|off)]\n\t");

 #endif

 #ifdef BFTPDAEMON

 	fprintf(stderr, " [-B]");

 #endif

-	fprintf(stderr, " [-debug]");

+	fprintf(stderr, " [-debug|-debug6]");

 #ifdef DIAGNOSTICS

 	fprintf(stderr, " [-D (options|report|exercise|netdata|ptydata)]\n\t");

 #endif