Don't hang if "Use DNS" is off. (Bug 1318.) Thanks to Rasmus

Sten who reported the bug and proposed an alternate fix.
* src/server/connections.c (login_request): Don't hang if the "Use
DNS" option is false.  (Bug 1318).  Log a warning message if
isc_resolve_remote() fails.
(src/server/testsuite/lyskomd.0/bug-1318.exp): New file.  Test the
"Use DNS: off" configuration option.

ChangeLog

+2005-12-22  Per Cederqvist  <ceder@lysator.liu.se>
+
+	Don't hang if "Use DNS" is off.  (Bug 1318.)  Thanks to Rasmus
+	Sten who reported the bug and proposed an alternate fix.
+	* src/server/connections.c (login_request): Don't hang if the "Use
+	DNS" option is false.  (Bug 1318).  Log a warning message if
+	isc_resolve_remote() fails.
+	(src/server/testsuite/lyskomd.0/bug-1318.exp): New file.  Test the
+	"Use DNS: off" configuration option.
+
 2005-12-21  Per Cederqvist  <ceder@lysator.liu.se>
 	"make check" without a previous "make" failed, because

src/server/connections.c

@@ -838,6 +838,7 @@ login_request(struct isc_scb *session)
     char portbuf[1+2+3*sizeof(long)];
     size_t portlen;
     char *remote_ip = NULL;
+    Bool dns_submitted = FALSE;
 
     /* Supress logins if /etc/nologin exists */
     if (fexists(param.nologin_file))
@@ -861,10 +862,27 @@ login_request(struct isc_scb *session)
     remote_ip = s_crea_c_str(cp->remote_ip);
 
     /* Initiate DNS lookup. */
-    if (param.use_dns && isc_resolve_remote(session, dns_resolution) == 0)
-	update_stat(STAT_DNS_QUEUE, 1);
-    else
+    if (param.use_dns)
+    {
+	int rv = isc_resolve_remote(session, dns_resolution);
+	if (rv == 0)
+	{
+	    dns_submitted = TRUE;
+	    update_stat(STAT_DNS_QUEUE, 1);
+	}
+	else
+	{
+	    kom_log("WNG: isc_resolve_remote of %s failed: %s\n",
+		    remote_ip, strerror(rv));
+	}
+    }
+
+    if (!dns_submitted)
+    {
 	s_strcpy(&session->remote, cp->remote_ip);
+	cp->blocked_by_dns = FALSE;
+	cp->dns_done = TRUE;
+    }
 
     /* Update the status file that contains all connection. */
     sprintf(portbuf, " %d", isc_getportnum(session->raddr));

src/server/testsuite/lyskomd.0/bug-1318.exp

+# Test suite for lyskomd.
+# Copyright (C) 2005  Lysator Academic Computer Association.
+#
+# This file is part of the LysKOM server.
+# 
+# LysKOM is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by 
+# the Free Software Foundation; either version 1, or (at your option) 
+# any later version.
+# 
+# LysKOM is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with LysKOM; see the file COPYING.  If not, write to
+# Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
+# or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
+# MA 02139, USA.
+#
+# Please report bugs at http://bugzilla.lysator.liu.se/. 
+
+# Test the "Use DNS: off" configuration option.
+
+lyskomd_start "" "Use DNS: off"
+client_start 0
+talk_to client 0
+send "A[holl "DejaGnu test suite"]\n"
+simple_expect "LysKOM" "MSHIP: Connected"
+send "1000 80 0 { }\n"
+simple_expect "=1000"
+send "1001 0 5 [holl "gazonk"]\n"
+simple_expect "=1001"
+send "1002 42 255\n"
+simple_expect "=1002"
+send "1003 44 0\n"
+simple_expect "=1003"
+client_death 0
+lyskomd_death