From owner-freebsd-stable@FreeBSD.ORG  Wed Jan  7 13:41:03 2004
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 9487616A4CE
	for <freebsd-stable@freebsd.org>;
	Wed,  7 Jan 2004 13:41:03 -0800 (PST)
Received: from shell.webmaster.com (mail.webmaster.com [216.152.64.131])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 858D243D1F
	for <freebsd-stable@freebsd.org>;
	Wed,  7 Jan 2004 13:41:00 -0800 (PST)
	(envelope-from davids@webmaster.com)
Received: from however ([206.171.168.138]) by shell.webmaster.com
          (Post.Office MTA v3.5.3 release 223 ID# 0-12345L500S10000V35)
          with SMTP id com; Wed, 7 Jan 2004 13:40:57 -0800
From: "David Schwartz" <davids@webmaster.com>
To: "Christian Klein" <chris@schwer.bewaff.net>,
	<freebsd-stable@freebsd.org>
Date: Wed, 7 Jan 2004 13:40:54 -0800
Message-ID: <MDEHLPKNGKAHNMBLJOLKKEOIJEAA.davids@webmaster.com>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Priority: 3 (Normal)
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0)
In-Reply-To: <91136089-4152-11D8-942B-000393076EEC@schwer.bewaff.net>
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2055
Importance: Normal
Subject: RE: getsockname()
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 07 Jan 2004 21:41:03 -0000


> (this is of course not my program, just some code that does the same)
>
> --- snipp ---
> #include <stdio.h>
> #include <sys/types.h>
> #include <sys/socket.h>
> #include <string.h>
> #include <stdlib.h>
> #include <netinet/in.h>
> #include <arpa/inet.h>
>
> int main()
> {
>      int sock, len;

	Okay, you haven't set the value of 'len'.

>      struct sockaddr_in addr, foo;
>
>      if((sock=socket(AF_INET, SOCK_STREAM, 0))<0)
>      {
>          exit(0);
>      }
>
>      memset(&addr, 0, sizeof(struct sockaddr_in));
>      addr.sin_family = AF_INET;
>      addr.sin_addr.s_addr = INADDR_ANY;
>      addr.sin_port = htons(0);
>
>      if(bind(sock, (struct sockaddr *) &addr, sizeof(struct
> sockaddr_in))<0)
>      {
>          perror("bind");
>          exit(0);
>      }
>
>      if(listen(sock, 5)<0)
>      {
>          perror("listen");
>          exit(0);
>      }
>
>      getsockname(sock, (struct sockaddr *) &foo, &len);

	Hmm, you still haven't set the value of 'len'. And you ignore the return
value of 'getsockname'.

>      fprintf(stderr, "listening on %s:%d\n", inet_ntoa(foo.sin_addr),
> ntohs(foo.sin_port));
>
>      return 0;
> }

> $ ./a.out
> listening on 86.186.4.40:49087
> $ ./a.out
> listening on 0.0.0.0:3810

	Fix those two bugs and see if you still have a problem.

	DS