tree e253f9cd397717d94993a5d02137d406b0a2adab
parent 6dbea8b5723d867aeee7dcfed2a83f2a608a846d
author Lorenzo Colitti <lorenzo@google.com> 1396239948 +0900
committer Lorenzo Colitti <lorenzo@google.com> 1422866844 +0900

Improve MarkTest.

1. Add TCP SYN+ACK tests including syncookies and checks that
   accepting connections succeeids and that the sockets returned
   by accept() are marked.
2. Mark the tests more robust with respect to extra packets by
   always explicitly expecting packets (including when testing
   outgoing kernel-generated packets) and looking for them
   anywhere in the queue instead of insisting they're the first
   packet in the queue.
3. Make the tests more robust by using random source port,
   disabling ICMP rate limits, setting SO_REUSEADDR, and
   clearing queues more reliably.
4. Move from 2 to 4 interfaces (mostly made possible by the
   robustness improvements above).
5. Use named constants instead of repeating the numbers in
   multiple places.

Change-Id: I596e557a7eea02ccf603c812a9b8ea6f5b2f95da