"SLC6X: development/libraries: libpcap
libpcap - A system-independent interface for user-level packet capture
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||Scientific Linux CERN, http://cern.ch/linux
Libpcap provides a portable framework for low-level network
monitoring. Libpcap can provide network statistics collection,
security monitoring and network debugging. Since almost every system
vendor provides a different interface for packet capture, the libpcap
authors created this system-independent API to ease in porting and to
alleviate the need for several system-dependent packet capture modules
in each application.
Install libpcap if you need to do low-level network traffic monitoring
on your network.