Using libpcap/Jpcap to capture and send packets on Solaris - Part 1

Using libpcap/Jpcap to capture and send packets on Solaris version (10/11)

Library used:
1.      Libpcap ( http://www.tcpdump.org) Version 1.2
2.      Jpcap( http://netresearch.ics.uci.edu/kfujii/Jpcap/doc/index.html) Version 0.6
Prerequisite:
1.      GCC
2.      Make

Notes:
1. Verify if these software’s are installed by writing #gcc and #make at the command prompt.
2.  See appendix to install these software.
Libpcap (version 1.2)

Installation
Download libpcap-1.2.0.tar.gz from http://www.tcpdump.org/#latest-release 

# gunzip libpcap-1.2.0rc1.tar.gz
                      

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# tar xf libpcap-1.2.0rc1.tar
                      

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# cd libpcap-1.2.0
                      

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Configure it for your OS, few files will be generated

# ./configure  
                      

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Specific to Solaris 11 - Start

This section (Marked in italcs) can be skipped if OS is solaris 10.
In case of Solaris 11 the configuration doesn’t work properly so do the following.

1.      config.h
Replace the following line
/* define if you have a cloning BPF device */
#define HAVE_CLONING_BPF 1
With
/* define if you have a cloning BPF device */
/* #undef HAVE_CLONING_BPF */
Replace the following line
/* #undef HAVE_DLPI_PASSIVE */
With
#define HAVE_DLPI_PASSIVE 1

Replace the following line
/* Define to 1 if you have the <netpacket/packet.h> header file. */
#define HAVE_NETPACKET_PACKET_H 1
With
/* Define to 1 if you have the <netpacket/packet.h> header file. */
/* #undef HAVE_NETPACKET_PACKET_H */


Replace the following line
/* Define to 1 if you have the <sys/bufmod.h> header file. */
/* #undef HAVE_SYS_BUFMOD_H */
With
/* Define to 1 if you have the <sys/bufmod.h> header file. */
#define HAVE_SYS_BUFMOD_H 1

2. MakeFile
Replace
INSTALL = /usr/bin/ginstall –c
With
INSTALL = ./install-sh -c
Replace the following lines
PSRC =      pcap-bpf.c    
FSRC =  fad-getad.c
SSRC =  
With
PSRC =      pcap-dlpi.c    
FSRC =  fad-glifc.c
SSRC =  dlpisubs.c
Specific to Solaris 11 - End

#make 
                      

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Upgrade or Update

If libpcap is already installed, then uninstall it before re-installing.

#make uninstall 
                      #make distclean 
                      

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New Installation

#make install 
                      

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Verify if libpcap is correctly installed by running some sample tests.

# make tests
                      

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Findalldevtest list all network interface device.

# ./findalldevstest 
                      

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NonBlocktest will start listening to the first network interface device.

# ./nonblocktest
                      

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Verify that the shared object file is created and installed.

# find /usr -name libpcap.so   
                      /usr/local/lib/libpcap.so
                      

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Set LD_LIBRARY_PATH (Jpcap will link this shared object)
                      
                      # echo LD_LIBRARY_PATH
                      

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Setting the library path (Path were libpcap.so is present)

# LD_LIBRARY_PATH=/usr/local/lib/
                      # export LD_LIBRARY_PATH
                      

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Exercise:

1.      Write a program to capture packets for a given network interface card.
2.      Write a program to broadcast packets through a given network interface card.
3.      Verify packets using snoop –d <NetworkInterfaceName> command.

Common Errors:
1.      Check LD_LIBRARY_PATH It should be set to where shared library is installed.


JPCap

Jpcap is a Java library for capturing and sending network packets. It internally uses libpcap/winpcap.

Installation
Download jpcap-0.6.zip ( http://netresearch.ics.uci.edu/kfujii/Jpcap/doc/download.html)

# unzip jpcap-0.6.zip 
                      #cd src/c 
                      #make 
                      

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You can observe lots of errors, so lets configure Makefile.  Set JAVA_HOME to correct path

# vi Makefile
                      

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Correct Option: Uncomment the following lines and comment out the respective other lines.

1.	JAVA_DIR = $(JAVA_HOME) 
                      2.	JNI_INCLUDE2 = $(JAVA_DIR)/include/solaris
                      3.	PCAP_INCLUDE = /usr/local/include/pcap
                      4.	COMPILE_OPTION = -G
                      

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Save this file and again execute make

#make
                      

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It will still have few more errors in Jpcap.c file.

#vi Jpcap.c 
                      

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Changes:

Solaris 10 and Solaris 11

1.      Replace the word “ifr.ifr_ifrn.ifrn_name” with “ifr.ifr_name”
2.      Replace the word “ifr.ifr_ifru.ifru_hwaddr. sa_data” with “ifr.ifr_ifru.ifru_enaddr”

Solaris 10 only

3.	#define SIOCGIFHWADDR  SIOCGIFADDR  
                      

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Post making these changes it will generate libjpcap.so file.

# make 
                      

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Move the shared library to /usr/local/lib

#cp libjpcap.so /usr/local/lib/
                      

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Verify that LD_LIBRARY_PATH is already set to /usr/local/lib.

#echo $LD_LIBRARY_PATH
                      

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Compile all the programs in sample directory and verify running each of them.

Exercise:

1.      Write a program to capture packets for a given network interface card using Jpcap.
2.      Write a program to broadcast packets through a given network interface card using jpcap.


Appendix:

Installation of Make and GCC

GCC
Verify if gcc is already installed

#find /usr -name gcc 
                      

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If it is not installed

#pkg install gcc-3
                      

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Append it to the path (Ex: /usr/sfw/bin)

#PATH=$PATH:/usr/sfw/bin
                      

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Make
Verify if make is already installed

# find /usr -name make
                      

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Append it to the path (Ex:/usr/ccs/bin)

# PATH=$PATH:/usr/ccs/bin
                      #echo $PATH and verify if gcc and make path are visible. 
                      

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