From 4a038e3f66a4f255b18613d9a2356ced4301ba2f Mon Sep 17 00:00:00 2001
From: Jun-ichiro itojun Hagino <itojun@cvs.openbsd.org>
Date: Sat, 11 Dec 1999 10:05:05 +0000
Subject: IPv6 support for finger client.

---
 usr.bin/finger/net.c | 62 ++++++++++++++++++++++++++++++----------------------
 1 file changed, 36 insertions(+), 26 deletions(-)

(limited to 'usr.bin/finger')

diff --git a/usr.bin/finger/net.c b/usr.bin/finger/net.c
index a39548ae752..1329c2e309c 100644
--- a/usr.bin/finger/net.c
+++ b/usr.bin/finger/net.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: net.c,v 1.6 1998/07/10 15:45:16 mickey Exp $	*/
+/*	$OpenBSD: net.c,v 1.7 1999/12/11 10:05:04 itojun Exp $	*/
 
 /*
  * Copyright (c) 1989 The Regents of the University of California.
@@ -38,7 +38,7 @@
 
 #ifndef lint
 /*static char sccsid[] = "from: @(#)net.c	5.5 (Berkeley) 6/1/90";*/
-static char rcsid[] = "$OpenBSD: net.c,v 1.6 1998/07/10 15:45:16 mickey Exp $";
+static char rcsid[] = "$OpenBSD: net.c,v 1.7 1999/12/11 10:05:04 itojun Exp $";
 #endif /* not lint */
 
 #include <sys/types.h>
@@ -60,44 +60,54 @@ netfinger(name)
 {
 	FILE *fp;
 	int c, lastc;
-	struct hostent *hp;
-	struct servent *sp;
-	struct sockaddr_in sin;
 	int s;
 	char *host;
+	struct addrinfo hints, *res0, *res;
+	int error;
+	char hbuf[NI_MAXHOST];
 
 	lastc = 0;
 	if (!(host = strrchr(name, '@')))
 		return;
 	*host++ = '\0';
-	if (inet_aton(host, &sin.sin_addr) == 0) {
-		hp = gethostbyname(host);
-		if (hp == 0) {
-			warnx("unknown host: %s", host);
-			return;
-		}
-		sin.sin_family = hp->h_addrtype;
-		bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
-		host = hp->h_name;
-	} else
-		sin.sin_family = AF_INET;
-	if (!(sp = getservbyname("finger", "tcp"))) {
-		warnx("tcp/finger: unknown service\n");
+	memset(&hints, 0, sizeof(hints));
+	hints.ai_family = PF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	error = getaddrinfo(host, "finger", &hints, &res0);
+	if (error) {
+		warnx("%s", gai_strerror(error));
 		return;
 	}
-	sin.sin_port = sp->s_port;
-	if ((s = socket(sin.sin_family, SOCK_STREAM, 0)) < 0) {
-		perror("finger: socket");
+
+	s = -1;
+	for (res = res0; res; res = res->ai_next) {
+		if ((s = socket(res->ai_family, res->ai_socktype,
+				res->ai_protocol)) < 0) {
+			continue;
+		}
+		if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
+			(void)close(s);
+			s = -1;
+			continue;
+		}
+
+		break;
+	}
+
+	if (s < 0) {
+		perror("finger");
+		freeaddrinfo(res0);
 		return;
 	}
 
 	/* have network connection; identify the host connected with */
-	(void)printf("[%s]\n", host);
-	if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
-		perror("finger: connect");
-		(void)close(s);
-		return;
+	if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
+			NULL, 0, NI_NUMERICHOST) != 0) {
+		strcpy(hbuf, "(invalid)");
 	}
+	(void)printf("[%s/%s]\n", host, hbuf);
+
+	freeaddrinfo(res0);
 
 	/* -l flag for remote fingerd  */
 	if (lflag)
-- 
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