From 469283453fa7d725c88addb1f3cecb78399a2f36 Mon Sep 17 00:00:00 2001
From: Niklas Hallqvist <niklas@cvs.openbsd.org>
Date: Tue, 22 Dec 1998 02:25:17 +0000
Subject: Generalize udp port decoding.  Remove unneeded decls.

---
 sbin/isakmpd/isakmpd.c | 15 +++++++------
 sbin/isakmpd/udp.c     | 59 ++++++++++++++++++++++++++++++--------------------
 sbin/isakmpd/udp.h     |  5 +++--
 3 files changed, 47 insertions(+), 32 deletions(-)

diff --git a/sbin/isakmpd/isakmpd.c b/sbin/isakmpd/isakmpd.c
index dafe9fbb544..8f14e18755e 100644
--- a/sbin/isakmpd/isakmpd.c
+++ b/sbin/isakmpd/isakmpd.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: isakmpd.c,v 1.5 1998/12/21 01:02:25 niklas Exp $	*/
-/*	$EOM: isakmpd.c,v 1.24 1998/12/01 10:18:43 niklas Exp $	*/
+/*	$OpenBSD: isakmpd.c,v 1.6 1998/12/22 02:25:16 niklas Exp $	*/
+/*	$EOM: isakmpd.c,v 1.25 1998/12/22 02:23:44 niklas Exp $	*/
 
 /*
  * Copyright (c) 1998 Niklas Hallqvist.  All rights reserved.
@@ -52,9 +52,6 @@
 #include "udp.h"
 #include "ui.h"
 
-extern char *optarg;
-extern int optind;
-
 /*
  * Set if -d is given, currently just for running in the foreground and log
  * to stderr instead of syslog.
@@ -117,10 +114,14 @@ parse_args (int argc, char *argv[])
       app_none++;
       break;
     case 'p':
-      udp_default_port = atoi (optarg);
+      udp_default_port = udp_decode_port (optarg);
+      if (!udp_default_port)
+	exit (1);
       break;
     case 'P':
-      udp_bind_port = atoi (optarg);
+      udp_bind_port = udp_decode_port (optarg);
+      if (!udp_bind_port)
+	exit (1);
       break;
     case 'r':
       srandom (strtoul (optarg, NULL, 0));
diff --git a/sbin/isakmpd/udp.c b/sbin/isakmpd/udp.c
index a483bbefb4a..2597d628ff6 100644
--- a/sbin/isakmpd/udp.c
+++ b/sbin/isakmpd/udp.c
@@ -1,5 +1,5 @@
-/*	$OpenBSD: udp.c,v 1.5 1998/12/22 01:46:04 niklas Exp $	*/
-/*	$EOM: udp.c,v 1.24 1998/12/22 01:40:23 niklas Exp $	*/
+/*	$OpenBSD: udp.c,v 1.6 1998/12/22 02:25:15 niklas Exp $	*/
+/*	$EOM: udp.c,v 1.25 1998/12/22 02:23:42 niklas Exp $	*/
 
 /*
  * Copyright (c) 1998 Niklas Hallqvist.  All rights reserved.
@@ -224,31 +224,13 @@ udp_create (char *name)
   char *addr_str, *port_str;
   in_addr_t addr;
   in_port_t port;
-  char *port_str_end;
-  long port_long;
-  struct servent *service;
 
   port_str = conf_get_str (name, "Port");
   if (port_str)
     {
-      port_long = strtol (port_str, &port_str_end, 0);
-      if (port_str == port_str_end)
-	{
-	  service = getservbyname (port_str, "udp");
-	  if (!service)
-	    {
-	      log_print ("udp_create: service \"%s\" unknown", port_str);
-	      return 0;
-	    }
-	  port = service->s_port;
-	}
-      else if (port_long < 1 || port_long > 65535)
-	{
-	  log_print ("udp_create: port %l out of range", port_long);
-	  return 0;
-	}
-      else
-	port = port_long;
+      port = udp_decode_port (port_str);
+      if (!port)
+	return 0;
     }
   else
     port = UDP_DEFAULT_PORT;
@@ -422,3 +404,34 @@ udp_get_src (struct transport *t, struct sockaddr **src, int *src_len)
   *src = (struct sockaddr *)&((struct udp_transport *)t)->src;
   *src_len = sizeof ((struct udp_transport *)t)->src;
 }
+
+/*
+ * Take a string containing an ext representation of port and return a
+ * binary port number.  Return zero if anything goes wrong.
+ */
+in_port_t
+udp_decode_port (char *port_str)
+{
+  char *port_str_end;
+  long port_long;
+  struct servent *service;
+
+  port_long = strtol (port_str, &port_str_end, 0);
+  if (port_str == port_str_end)
+    {
+      service = getservbyname (port_str, "udp");
+      if (!service)
+	{
+	  log_print ("udp_decode_port: service \"%s\" unknown", port_str);
+	  return 0;
+	}
+      return service->s_port;
+    }
+  else if (port_long < 1 || port_long > 65535)
+    {
+      log_print ("udp_decode_port: port %ld out of range", port_long);
+      return 0;
+    }
+
+  return port_long;
+}
diff --git a/sbin/isakmpd/udp.h b/sbin/isakmpd/udp.h
index eec8f13e0fb..143064dd552 100644
--- a/sbin/isakmpd/udp.h
+++ b/sbin/isakmpd/udp.h
@@ -1,5 +1,5 @@
-/*	$OpenBSD: udp.h,v 1.3 1998/11/17 11:10:21 niklas Exp $	*/
-/*	$EOM: udp.h,v 1.3 1998/10/08 20:22:18 niklas Exp $	*/
+/*	$OpenBSD: udp.h,v 1.4 1998/12/22 02:25:15 niklas Exp $	*/
+/*	$EOM: udp.h,v 1.4 1998/12/22 02:23:43 niklas Exp $	*/
 
 /*
  * Copyright (c) 1998 Niklas Hallqvist.  All rights reserved.
@@ -40,6 +40,7 @@
 extern in_port_t udp_default_port;
 extern in_port_t udp_bind_port;
 
+extern in_port_t udp_decode_port (char *);
 extern void udp_init (void);
 
 #endif /* _UDP_H_ */
-- 
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