File openssh-7.7p1-IPv6_X_forwarding.patch of Package openssh-askpass-gnome.28809

# HG changeset patch
# Parent  8df645ca39d64de025d8838c5713812e72308c92
Correctly parse DISPLAY variable for cases where it contains an IPv6 address
(which should - but not always is - in (square) brackets).

bnc#847710 - https://bugzilla.novell.com/show_bug.cgi?id=847710

diff --git a/openssh-7.7p1/channels.c b/openssh-7.7p1/channels.c
--- openssh-7.7p1/channels.c
+++ openssh-7.7p1/channels.c
@@ -4590,33 +4590,42 @@ x11_connect_display(struct ssh *ssh)
 			return -1;
 
 		/* OK, we now have a connection to the display. */
 		return sock;
 	}
 	/*
 	 * Connect to an inet socket.  The DISPLAY value is supposedly
 	 * hostname:d[.s], where hostname may also be numeric IP address.
+	 * Note that IPv6 numeric addresses contain colons (e.g. ::1:0)
 	 */
 	strlcpy(buf, display, sizeof(buf));
-	cp = strchr(buf, ':');
+	cp = strrchr(buf, ':');
 	if (!cp) {
 		error("Could not find ':' in DISPLAY: %.100s", display);
 		return -1;
 	}
 	*cp = 0;
 	/*
 	 * buf now contains the host name.  But first we parse the
 	 * display number.
 	 */
 	if (sscanf(cp + 1, "%u", &display_number) != 1) {
 		error("Could not parse display number from DISPLAY: %.100s",
 		    display);
 		return -1;
 	}
+	
+	/* Remove brackets surrounding IPv6 addresses if there are any. */
+	if (buf[0] == '[' && (cp = strchr(buf, ']'))) {
+		*cp = 0;
+		cp = buf + 1;
+	} else {
+		cp = buf;
+	}
 
 	/* Look up the host address */
 	memset(&hints, 0, sizeof(hints));
 	hints.ai_family = ssh->chanctxt->IPv4or6;
 	hints.ai_socktype = SOCK_STREAM;
 	snprintf(strport, sizeof strport, "%u", 6000 + display_number);
 	if ((gaierr = getaddrinfo(buf, strport, &hints, &aitop)) != 0) {
 		error("%.100s: unknown host. (%s)", buf,