From 0bbbf2a4d282d1621a691523b2613e549c3f7052 Mon Sep 17 00:00:00 2001
From: djm <djm>
Date: Sat, 5 Nov 2005 04:16:52 +0000
Subject: [PATCH]    - dtucker@cvs.openbsd.org 2005/11/03 13:38:29     
 [canohost.c]      Cache reverse lookups with and without DNS separately; ok
 markus@

---
 ChangeLog    |  3 +++
 canohost.c   | 27 ++++++++++++++-------------
 serverloop.c | 36 +++++++++++++++++++++++++++++++++++-
 3 files changed, 52 insertions(+), 14 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b798593b..d1a8fc37 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -90,6 +90,9 @@
    - jmc@cvs.openbsd.org 2005/10/31 19:55:25
      [ssh-keygen.1]
      grammar;
+   - dtucker@cvs.openbsd.org 2005/11/03 13:38:29
+     [canohost.c]
+     Cache reverse lookups with and without DNS separately; ok markus@
 
 20051102
  - (dtucker) [openbsd-compat/bsd-misc.c] Bug #1108: fix broken strdup().
diff --git a/canohost.c b/canohost.c
index 66867c10..bd7f830d 100644
--- a/canohost.c
+++ b/canohost.c
@@ -12,7 +12,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: canohost.c,v 1.46 2005/10/30 08:29:29 dtucker Exp $");
+RCSID("$OpenBSD: canohost.c,v 1.47 2005/11/03 13:38:29 dtucker Exp $");
 
 #include "packet.h"
 #include "xmalloc.h"
@@ -198,26 +198,27 @@ ipv64_normalise_mapped(struct sockaddr_storage *addr, socklen_t *len)
 const char *
 get_canonical_hostname(int use_dns)
 {
+	char *host;
 	static char *canonical_host_name = NULL;
-	static int use_dns_done = 0;
+	static char *remote_ip = NULL;
 
 	/* Check if we have previously retrieved name with same option. */
-	if (canonical_host_name != NULL) {
-		if (use_dns_done != use_dns)
-			xfree(canonical_host_name);
-		else
-			return canonical_host_name;
-	}
+	if (use_dns && canonical_host_name != NULL)
+		return canonical_host_name;
+	if (!use_dns && remote_ip != NULL)
+		return remote_ip;
 
 	/* Get the real hostname if socket; otherwise return UNKNOWN. */
 	if (packet_connection_is_on_socket())
-		canonical_host_name = get_remote_hostname(
-		    packet_get_connection_in(), use_dns);
+		host = get_remote_hostname(packet_get_connection_in(), use_dns);
 	else
-		canonical_host_name = xstrdup("UNKNOWN");
+		host = "UNKNOWN";
 
-	use_dns_done = use_dns;
-	return canonical_host_name;
+	if (use_dns)
+		canonical_host_name = host;
+	else
+		remote_ip = host;
+	return host;
 }
 
 /*
diff --git a/serverloop.c b/serverloop.c
index 208f7e1e..03376bac 100644
--- a/serverloop.c
+++ b/serverloop.c
@@ -35,7 +35,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: serverloop.c,v 1.120 2005/10/30 08:52:17 djm Exp $");
+RCSID("$OpenBSD: serverloop.c,v 1.121 2005/10/31 11:48:29 djm Exp $");
 
 #include "xmalloc.h"
 #include "packet.h"
@@ -61,6 +61,7 @@ extern ServerOptions options;
 /* XXX */
 extern Kex *xxx_kex;
 extern Authctxt *the_authctxt;
+extern int use_privsep;
 
 static Buffer stdin_buffer;	/* Buffer for stdin data. */
 static Buffer stdout_buffer;	/* Buffer for stdout data. */
@@ -90,6 +91,9 @@ static int client_alive_timeouts = 0;
 
 static volatile sig_atomic_t child_terminated = 0;	/* The child has terminated. */
 
+/* Cleanup on signals (!use_privsep case only) */
+static volatile sig_atomic_t received_sigterm = 0;
+
 /* prototypes */
 static void server_init_dispatch(void);
 
@@ -151,6 +155,12 @@ sigchld_handler(int sig)
 	errno = save_errno;
 }
 
+static void
+sigterm_handler(int sig)
+{
+	received_sigterm = sig;
+}
+
 /*
  * Make packets from buffered stderr data, and buffer it for sending
  * to the client.
@@ -502,6 +512,12 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg)
 	child_terminated = 0;
 	mysignal(SIGCHLD, sigchld_handler);
 
+	if (!use_privsep) {
+		signal(SIGTERM, sigterm_handler);
+		signal(SIGINT, sigterm_handler);
+		signal(SIGQUIT, sigterm_handler);
+	}
+
 	/* Initialize our global variables. */
 	fdin = fdin_arg;
 	fdout = fdout_arg;
@@ -629,6 +645,12 @@ server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg)
 		wait_until_can_do_something(&readset, &writeset, &max_fd,
 		    &nalloc, max_time_milliseconds);
 
+		if (received_sigterm) {
+			logit("Exiting on signal %d", received_sigterm);
+			/* Clean up sessions, utmp, etc. */
+			cleanup_exit(255);
+		}
+
 		/* Process any channel events. */
 		channel_after_select(readset, writeset);
 
@@ -749,6 +771,12 @@ server_loop2(Authctxt *authctxt)
 	connection_in = packet_get_connection_in();
 	connection_out = packet_get_connection_out();
 
+	if (!use_privsep) {
+		signal(SIGTERM, sigterm_handler);
+		signal(SIGINT, sigterm_handler);
+		signal(SIGQUIT, sigterm_handler);
+	}
+
 	notify_setup();
 
 	max_fd = MAX(connection_in, connection_out);
@@ -766,6 +794,12 @@ server_loop2(Authctxt *authctxt)
 		wait_until_can_do_something(&readset, &writeset, &max_fd,
 		    &nalloc, 0);
 
+		if (received_sigterm) {
+			logit("Exiting on signal %d", received_sigterm);
+			/* Clean up sessions, utmp, etc. */
+			cleanup_exit(255);
+		}
+
 		collect_children();
 		if (!rekeying) {
 			channel_after_select(readset, writeset);
-- 
2.45.1