ruby-pcaprub 0.11.3-1 (i386 binary) in ubuntu trusty

 libpcap (Packet CAPture) provides a portable framework for low-level
 network monitoring. Applications include network statistics collection,
 security monitoring, network debugging, etc.
 .
 pcaprub provide a consistent interface for using libcap in Ruby.
 .
 It does not provide packet processing functionality, only the interface for
 capturing packets, and passing yielding those packets.