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On Mac OS X, disable the alarm/longjmp stuff for timing out name 

resolution queries - it runs a significant risk of crashing applications
that do that.

svn path=/trunk/; revision=9042
This commit is contained in:
Guy Harris 2003-11-20 05:04:57 +00:00
parent 6d5751b6e7
commit 1581057cc4
1 changed files with 15 additions and 2 deletions
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17
epan/resolv.c
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@ -1,7 +1,7 @@
/* resolv.c
* Routines for network object lookup
*
* $Id: resolv.c,v 1.37 2003/10/14 00:40:14 guy Exp $
* $Id: resolv.c,v 1.38 2003/11/20 05:04:57 guy Exp $
*
* Laurent Deniel <laurent.deniel@free.fr>
*
@ -33,7 +33,20 @@
#include <stdlib.h>
#include <string.h>
#ifndef WIN32
/*
* Win32 doesn't have SIGALRM.
*
* Mac OS X does, but if you longjmp() out of a name resolution call in
* a signal handler, you might crash, because the state of the resolution
* code that sends messages to lookupd might be inconsistent if you jump
* out of it in middle of a call.
*
* There's no guarantee that longjmp()ing out of name resolution calls
* will work on *any* platform; OpenBSD got rid of the alarm/longjmp
* code in tcpdump, to avoid those sorts of problems, and that was
* picked up by tcpdump.org tcpdump.
*/
#if !defined(WIN32) && !defined(__APPLE__)
#ifndef AVOID_DNS_TIMEOUT
#define AVOID_DNS_TIMEOUT
#endif