From 5e7fd076f517e01cbab0549cbb43245f66c1ac70 Mon Sep 17 00:00:00 2001
From: Damien Miller <djm@mindrot.org>
Date: Sat, 5 Nov 2005 14:53:39 +1100
Subject:    - djm@cvs.openbsd.org 2005/10/11 23:37:37      [channels.c]     
 bz #1076 set SO_REUSEADDR on X11 forwarding listner sockets, preventing     
 bind() failure when a previous connection's listeners are in TIME_WAIT,     
 reported by plattner AT inf.ethz.ch; ok dtucker@

---
 ChangeLog  |  7 ++++++-
 channels.c | 27 ++++++++++++++++++---------
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 221301eb9..f70f40f36 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,11 @@
      fix regression I introduced in 4.2: X11 forwardings initiated after
      a session has exited (e.g. "(sleep 5; xterm) &") would not start.
      bz #1086 reported by t8m AT centrum.cz; ok markus@ dtucker@
+   - djm@cvs.openbsd.org 2005/10/11 23:37:37
+     [channels.c]
+     bz #1076 set SO_REUSEADDR on X11 forwarding listner sockets, preventing
+     bind() failure when a previous connection's listeners are in TIME_WAIT,
+     reported by plattner AT inf.ethz.ch; ok dtucker@
 
 20051102
  - (dtucker) [openbsd-compat/bsd-misc.c] Bug #1108: fix broken strdup().
@@ -3145,4 +3150,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.3928 2005/11/05 03:52:50 djm Exp $
+$Id: ChangeLog,v 1.3929 2005/11/05 03:53:39 djm Exp $
diff --git a/channels.c b/channels.c
index b0bc77901..175b59e44 100644
--- a/channels.c
+++ b/channels.c
@@ -39,7 +39,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: channels.c,v 1.225 2005/10/10 10:23:08 djm Exp $");
+RCSID("$OpenBSD: channels.c,v 1.226 2005/10/11 23:37:37 djm Exp $");
 
 #include "ssh.h"
 #include "ssh1.h"
@@ -1230,6 +1230,19 @@ port_open_helper(Channel *c, char *rtype)
 	xfree(remote_ipaddr);
 }
 
+static void
+channel_set_reuseaddr(int fd)
+{
+	int on = 1;
+
+	/*
+	 * Set socket options.
+	 * Allow local port reuse in TIME_WAIT.
+	 */
+	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1)
+		error("setsockopt SO_REUSEADDR fd %d: %s", fd, strerror(errno));
+}
+
 /*
  * This socket is listening for connections to a forwarded TCP/IP port.
  */
@@ -2191,7 +2204,7 @@ channel_setup_fwd_listener(int type, const char *listen_addr, u_short listen_por
     const char *host_to_connect, u_short port_to_connect, int gateway_ports)
 {
 	Channel *c;
-	int sock, r, success = 0, on = 1, wildcard = 0, is_client;
+	int sock, r, success = 0, wildcard = 0, is_client;
 	struct addrinfo hints, *ai, *aitop;
 	const char *host, *addr;
 	char ntop[NI_MAXHOST], strport[NI_MAXSERV];
@@ -2278,13 +2291,8 @@ channel_setup_fwd_listener(int type, const char *listen_addr, u_short listen_por
 			verbose("socket: %.100s", strerror(errno));
 			continue;
 		}
-		/*
-		 * Set socket options.
-		 * Allow local port reuse in TIME_WAIT.
-		 */
-		if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on,
-		    sizeof(on)) == -1)
-			error("setsockopt SO_REUSEADDR: %s", strerror(errno));
+
+		channel_set_reuseaddr(sock);
 
 		debug("Local forwarding listening on %s port %s.", ntop, strport);
 
@@ -2710,6 +2718,7 @@ x11_create_display_inet(int x11_display_offset, int x11_use_localhost,
 					error("setsockopt IPV6_V6ONLY: %.100s", strerror(errno));
 			}
 #endif
+			channel_set_reuseaddr(sock);
 			if (bind(sock, ai->ai_addr, ai->ai_addrlen) < 0) {
 				debug2("bind port %d: %.100s", port, strerror(errno));
 				close(sock);
-- 
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