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

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I just did a complete install as follows on my Dual Opteron running
Gentoo 2.6.17-r8:

libpcap (Phil Woods)
../configure --enable-shared
make
sudo make install

(ensure /usr/local/lib is in ld.so.conf)
sudo ldconfig



snort (with the options I use)
../configure --with-libpcap-library=/usr/local/lib --enable-debug \
- --enable-perfprofiling --enable-dynamicplugin
make
sudo make install

ldd /usr/local/bin/snort
libpcre.so.0 => /usr/lib/libpcre.so.0 (0x00002b3e9220e000)
libpcap-0.9.3.so => /usr/local/lib/libpcap-0.9.3.so
(0x00002b3e9232a000)
libm.so.6 => /lib/libm.so.6 (0x00002b3e92459000)
libnsl.so.1 => /lib/libnsl.so.1 (0x00002b3e925af000)
libdl.so.2 => /lib/libdl.so.2 (0x00002b3e926c5000)
libc.so.6 => /lib/libc.so.6 (0x00002b3e927c9000)
/lib64/ld-linux-x86-64.so.2 (0x00002b3e920f2000)

After this I had a working snort-2.6.1.2.


Darryl Taylor


IT Security wrote:
> 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
>
> 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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