Re: [Comm] XDMCP

[Michael Shigorin <mike@osdn.org.ua>]

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On Sat, Nov 02, 2013 at 07:45:43PM +0200, Roman Savochenko wrote:
> XDMCP warning: INET6 UDP socket creation failed
> Из исходников вроде видно, что если IPV6 определён,
> то остальное он даже не смотрит!

Возможно, следует откатить эти или подобные им патчи.

-- 
 ---- WBR, Michael Shigorin / http://altlinux.org
  ------ http://opennet.ru / http://anna-news.info

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Debian #562126; enable gdmchooser to work with netbase default setting
net.ipv6.bindv6only=1

diff -Naur gdm-2.20.10/gui/gdmchooser.c gdm-2.20.10/gui/gdmchooser.c
--- gdm-2.20.10/gui/gdmchooser.c	2009-03-19 00:29:11.000000000 -0430
+++ gdm-2.20.10/gui/gdmchooser.c	2010-02-09 20:10:08.000000000 -0430
@@ -1121,6 +1121,7 @@
 {
 	static XdmcpHeader header;
 	gint sockopts = 1;
+	int ipv6_only_flag = 0;
 
 	/* Open socket for communication */
 #ifdef ENABLE_IPV6
@@ -1140,6 +1141,13 @@
 		gdm_common_fail_exit ("Could not set socket options!");
 	}
 
+	if (have_ipv6) {
+		if (setsockopt (sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
+			(char*)&ipv6_only_flag, sizeof(ipv6_only_flag)) < 0) {
+			gdm_common_fail_exit ("Could not set socket options!");
+            }
+	}
+
 	/* Assemble XDMCP BROADCAST_QUERY packet in static buffer */
 	header.opcode  = (CARD16) BROADCAST_QUERY;
 	header.length  = 1;

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Debian #563406

Index: gdm-2.20.10/daemon/gdm-xdmcp-manager.c
===================================================================
--- gdm-2.20.10.orig/daemon/gdm-xdmcp-manager.c	2010-02-28 13:57:47.685002928 +0100
+++ gdm-2.20.10/daemon/gdm-xdmcp-manager.c	2010-02-28 14:01:54.697504018 +0100
@@ -398,6 +398,7 @@ static int
 create_socket (struct addrinfo *ai)
 {
 	int sock;
+	int zero = 0;
 
 	sock = socket (ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 	if (sock < 0) {
@@ -405,6 +406,14 @@ create_socket (struct addrinfo *ai)
 		return sock;
 	}
 
+	if (ai->ai_family == AF_INET6) {
+		if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof zero) < 0) {
+			gdm_error("setsockopt(IPV6_V6ONLY): %s\n", g_strerror(errno));
+			close(sock);
+			return -1;
+		}
+	}
+
 	if (bind (sock, ai->ai_addr, ai->ai_addrlen) < 0) {
 		gdm_error ("bind: %s", g_strerror (errno));
 		close (sock);