Include automatic filtering (based on source MAC address of first
transmitted packet).

Proven to successfully elicit a ping response from a remote host.

socket, accept new connections, open a network interface using libpcap
and forward (all) traffic.

moment.

No code changes apart from commenting one unused function out.

when make is invoked without arguments

size.  (The restriction on the size of free blocks remains.)

Works with a non-multicast TFTP server (i.e. the fallback path works
fine).

Make await_tftp() static and create tftp_get() for fetching the next TFTP
packet instead.

shared between TFTP, TFTM and MTFTP protocols.

lines of code.