MFC: 272962

Add a new option, -P, to pkt-gen which reads a single packet from a stored
pcap file and transmits it instead of the default UDP packet.

Reviewed by: luigi

MFC 270063: update of netmap code
(vtnet and cxgbe not merged yet because we need some other mfc first)

MFH: sync the netmap code with the one in HEAD
(enhanced VALE switch, netmap pipes, emulated netmap mode).
See details in the log for svn 261909.

MFC: 272962

Add a new option, -P, to pkt-gen which reads a single packet from a stored
pcap file and transmits it instead of the default UDP packet.

Reviewed by: luigi

MFC 270063: update of netmap code
(vtnet and cxgbe not merged yet because we need some other mfc first)

MFH: sync the netmap code with the one in HEAD
(enhanced VALE switch, netmap pipes, emulated netmap mode).
See details in the log for svn 261909.