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Re: [Snort-users] Phil Wood Libpcap Installation Problems

from [IT Security] Network Security [Permanent Link]
Subject: Re: [Snort-users] Phil Wood Libpcap Installation Problems
Date: Tue, 23 Jan 2007 11:21:55 -0800 
I recompiled libpcap to use shared libraries and now have the following
in /usr/lib:

lrwxrwxrwx  1 root root     16 Jan 23 08:56 /usr/lib/libpcap-0.8.3.so ->
libpcap-0.9.3.so
-rwxr-xr-x  1 root root 375850 Jan 23 09:00 /usr/lib/libpcap-0.9.3.so
-rw-r--r--  1 root root 483168 Jan 23 09:00 /usr/lib/libpcap.a
-rwxr-xr-x  1 root root    792 Jan 23 09:00 /usr/lib/libpcap.la
lrwxrwxrwx  1 root root     16 Jan 23 09:00 /usr/lib/libpcap.so ->
libpcap-0.9.3.so
lrwxrwxrwx  1 root root     16 Jan 23 09:02 /usr/lib/libpcap.so.0 ->
libpcap-0.9.3.so
lrwxrwxrwx  1 root root     16 Jan 23 09:03 /usr/lib/libpcap.so.0.8 ->
libpcap-0.9.3.so
lrwxrwxrwx  1 root root     16 Jan 23 09:03 /usr/lib/libpcap.so.0.8.3 ->
libpcap-0.9.3.so

I added the symlinks for libpcap 0.8.3 with hopes that it would help,
but it didn't.

I have run ldconfig since reinstalling libpcap.

Attempting to recompile snort and tcpdump both end with the result of:

checking for strerror... yes
checking for __FUNCTION__... yes
checking for floor in -lm... yes
checking for pcap_datalink in -lpcap... no

   ERROR!  Libpcap library/headers not found, go get it from
   http://www.tcpdump.org
   or use the --with-libpcap-* options, if you have it installed
   in unusual place

This makes me think that I'm missing something accosiated with libpcap.

Any more ideas?

Thanks in advance.

- Jesse





-----Original Message-----
From: snort-users-bounces@lists.sourceforge.net
[mailto:snort-users-bounces@lists.sourceforge.net] On Behalf Of IT
Security
Sent: Tuesday, January 23, 2007 8:11 AM
To: Darryl Taylor
Cc: snort-users@lists.sourceforge.net
Subject: Re: [Snort-users] Phil Wood Libpcap Installation Problems

Darryl -

Tried with no luck.  Still get the same error.

./configure --with-libpcap-library=/usr/local/lib

Thanks for the assistance.

- Jesse



-----Original Message-----
From: Darryl Taylor [mailto:darryl.taylor@sourcefire.com]
Sent: Tuesday, January 23, 2007 8:00 AM
To: darryl.taylor@sourcefire.com
Cc: IT Security; snort-users-bounces@lists.sourceforge.net;
snort-users@lists.sourceforge.net
Subject: Re: [Snort-users] Phil Wood Libpcap Installation Problems

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Sorry bout that. Needed a little more sleep. It should be
- --with-libpcap-library=[your path]



Darryl Taylor
Security Engineer
SOURCEfire
Office: 404-474-8454
Cell:   404-783-2064
eFax:   404-521-4309

Fingerprint: AEA7 16DB 2DC3 0C3E 43A9 F1B6 E25A 6A7C 16F2 68B6
Key: http://demo.sourcefire.com/dtaylor.pgp.key




darryl.taylor@sourcefire.com wrote:

Try ./configure --with-libpcap=/usr/local when compiling snort. If it

still fails then the library was probably compiled statically. If that
is the case, post back and I will tell you how to make it a shared
object. I think I had this problem a few years ago. 


Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: "IT Security" <ITSEC@24hourfit.com>
Date: Mon, 22 Jan 2007 17:46:59
To:<snort-users@lists.sourceforge.net>
Subject: [Snort-users] Phil Wood Libpcap Installation Problems

I'm trying to get Phil Wood's modified libpcap working on my Snort
2.6.1 sensor, but have run into some difficulties and hoping that 
someone out there can help.

I've downloaded and extracted libpcap-0.9.20060417.tar.gz.  I then

run:


   ./configure
   make
   make install

I then downloaded and extracted snort-2.6.1.1.tar.gz.  I then run:

   ./configure
   make

That's where it blows up.  Here is the error:

<snip>

checking for pcap_datalink in -lpcap... no

   ERROR!  Libpcap library/headers not found, go get it from
   http://www.tcpdump.org
   or use the --with-libpcap-* options, if you have it installed
   in unusual place

</snip>

Any ideas why the headers would be missing?  Header files are 
identified with the .h extension correct?  Where are these supposed to



reside on the system?

I'm running CentOS 4 with 2.6.9-42.0.3.EL kernel.

Thanks in advance.

- Jesse

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