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ROOT ‹ FreeBSD, Linux and AIX ‹ Package and Software Management ‹ "checking for libnet_build_ip in -lnet... no"+"ERROR! Libnet library not found"

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"checking for libnet_build_ip in -lnet... no"+"ERROR! Libnet library not found"
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debuser
Post  Post subject: "checking for libnet_build_ip in -lnet... no"+"ERROR! Libnet library not found"  |  Posted: Fri Sep 24, 2010 11:08 am

Joined: Thu Aug 06, 2009 9:48 am
Posts: 90

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It can happen that nemesis installation to fail because the configure script cannot find libnet. THis is not nemesis's fault, it's the admin's fault (mine and yours :D ).
Nemesis configure script error:
Quote:
checking for an ANSI C-conforming const... yes
checking for gawk... (cached) gawk
checking for a BSD-compatible install... /usr/bin/install -c
checking whether ln -s works... yes
checking for fabs in -lm... yes
checking for inet_ntoa in -lnsl... yes
checking for socket in -lsocket... no
checking for hstrerror in -lresolv... yes
checking for libnet_build_ip in -lnet... no

ERROR! Libnet library not found, go get it from
http://www.packetfactory.net/projects/libnet/
or use the --with-libnet-* options, if you have it installed
in unusual place



The nemesis project website instructs that nemesis requires libnet-1.0.2a, not first libnet source that falls in our hands (the official website was down).

The correct libnet contains a folder named "Libnet-1.0.2a" and not "libnet".

Go and download the correct libnet source file from http://code.google.com/p/ips-builder/downloads/detail?name=libnet-1.0.2a.tar.gz&can=2&q= and follow my post on how to install libnet library and nemesis packet crafting tool:
http://forum.ivorde.ro/centos-install-nemesis-packet-crafting-tool-libnet-t134.html

This solved the "checking for libnet_build_ip in -lnet... no"+"ERROR! Libnet library not found" for me and allowed me to continue installing nemesis tool.
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admin
Post  Post subject: Re: "checking for libnet_build_ip in -lnet... no"+"ERROR! Libnet library not found"  |  Posted: Tue Dec 06, 2011 5:32 pm
Site Admin

Joined: Mon Aug 03, 2009 3:43 pm
Posts: 25

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Since Nemesis development stopped a long time ago, it doesn't compile by default on x86_64 architectures. Following error will appear.
Code:
nemesis-1.4]# make
make  all-recursive
make[1]: Entering directory `/root/nemesis/nemesis-1.4'
Making all in src
make[2]: Entering directory `/root/nemesis/nemesis-1.4/src'
gcc -DHAVE_CONFIG_H -I. -I. -I..   -DLIBNET_LIL_ENDIAN -I/usr/local/include -I/sw/include  -g -O2 -Wall -funroll-loops -pipe -c `test -f 'nemesis-arp.c' || echo './'`nemesis-arp.c
gcc -DHAVE_CONFIG_H -I. -I. -I..   -DLIBNET_LIL_ENDIAN -I/usr/local/include -I/sw/include  -g -O2 -Wall -funroll-loops -pipe -c `test -f 'nemesis-dns.c' || echo './'`nemesis-dns.c
gcc -DHAVE_CONFIG_H -I. -I. -I..   -DLIBNET_LIL_ENDIAN -I/usr/local/include -I/sw/include  -g -O2 -Wall -funroll-loops -pipe -c `test -f 'nemesis-ethernet.c' || echo './'`nemesis-ethernet.c
gcc -DHAVE_CONFIG_H -I. -I. -I..   -DLIBNET_LIL_ENDIAN -I/usr/local/include -I/sw/include  -g -O2 -Wall -funroll-loops -pipe -c `test -f 'nemesis-fileio.c' || echo './'`nemesis-fileio.c
gcc -DHAVE_CONFIG_H -I. -I. -I..   -DLIBNET_LIL_ENDIAN -I/usr/local/include -I/sw/include  -g -O2 -Wall -funroll-loops -pipe -c `test -f 'nemesis-functions.c' || echo './'`nemesis-functions.c
nemesis-functions.c: In function 'nemesis_check_link':
nemesis-functions.c:342: error: dereferencing pointer to incomplete type
make[2]: *** [nemesis-functions.o] Error 1
make[2]: Leaving directory `/root/nemesis/nemesis-1.4/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/nemesis/nemesis-1.4'
make: *** [all] Error 2


Edit "/usr/include/libnet/libnet-headers.h" file (use your specific location) and change:
Code:
#if (!__GLIBC__)
struct ether_addr
{
    u_char  ether_addr_octet[6];
};
#endif

to
Code:
//#if (!__GLIBC__)
struct ether_addr
{
    u_char  ether_addr_octet[6];
};
//#endif
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