Merge changes I98571b8e,Icda61c12,If5062d86

* changes:
  Add StructUdpHeader class to parse UDP header from a packet
  Add StructTcpHeader class to parse TCP header from a packet
  Add StructIpv4Header class to parse IPv4 header from a packet
tree: 20298a82fb8706a7f2e238c502fdaaec012e44ee
  1. staticlibs/