RE: Libnet 1.1.1 RC 5

From: Mike Schiffman <mike(at)infonexus.com>
Date: Thu Jun 19 2003 - 03:35:39 EDT

Thanks Fred. WRT the ICMP warnings -- I saw these and I'm also not sure why the compiler complains. Anyone smart out there?

tradecraft:~/Code/Libnet-1.1.1-RC-005/src> touch libnet_build_icmp.c; make
gcc -DHAVE_CONFIG_H -I. -I. -I../include -g -O2 -Wall -c

libnet_build_icmp.c
libnet_build_icmp.c: In function `libnet_build_icmpv4_unreach':
libnet_build_icmp.c:268: warning: `p' might be used uninitialized in

this function
libnet_build_icmp.c: In function `libnet_build_icmpv4_timeexceed': libnet_build_icmp.c:367: warning: `p' might be used uninitialized in this function
libnet_build_icmp.c: In function `libnet_build_icmpv4_redirect': libnet_build_icmp.c:464: warning: `p' might be used uninitialized in this function

--
Mike Schiffman, CISSP
http://www.packetfactory.net/schiffman.html 

-----Original Message-----
From: Frédéric Raynal [mailto:pappy-ml@security-labs.org] 
Sent: Thursday, June 19, 2003 12:12 AM
To: Mike Schiffman
Cc: 'Darrin Miller'; libnet@lists.securityfocus.com
Subject: Re: Libnet 1.1.1 RC 5



On Wed, Jun 18, 2003 at 08:18:10PM -0700, Mike Schiffman wrote:

> Hrm, that's probably inside libnet_raw.c.  I develop on OpenBSD 


> exclusively so and I think I rm'd a line I shouldn't have.  Anyone 

> have a patch yet?  If not I'll do it later.


--- Libnet-1.1.1-RC-005.old/src/libnet_raw.c	Thu Jun 19 08:59:25 2003
+++ Libnet-1.1.1-RC-005/src/libnet_raw.c	Thu Jun 19 09:03:40 2003
@@ -112,8 +112,11 @@
 libnet_open_raw6(libnet_t *l)
 {
 #if !(__WIN32__)
+     int one = 1;
 #if (__svr4__)
      void *oneptr = &one;
+#else
+    int *oneptr = &one;
 #endif  /* __svr4__ */
 #else
     BOOL one;



There are also warnings with the 3 patched icmp functions:

libnet_build_icmp.c: In function `libnet_build_icmpv4_unreach':
libnet_build_icmp.c:268: warning: `p' might be used uninitialized in
this function
libnet_build_icmp.c: In function `libnet_build_icmpv4_timeexceed':
libnet_build_icmp.c:367: warning: `p' might be used uninitialized in
this function
libnet_build_icmp.c: In function `libnet_build_icmpv4_redirect':
libnet_build_icmp.c:464: warning: `p' might be used uninitialized in
this function


But I really do not understand why ... so if someone has an idea (a
solution would be to "nullify" the pointers as soon as they are
declared).


A BGP-4 builder will arrive probably today, but I'll need help for
testing as I dont have the needed infrastructure for that.

	Fred Raynal

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Received on Thu Jun 19 03:51:05 2003