When accompanied by cookie option, Initiator (client) queues incoming
SYNACK transaction data.

This is a straightforward re-implementation of an earlier (year-old)
patch that no longer applies cleanly, with permission of the original
author (Adam Langley).  The patch was previously reviewed:

    http://thread.gmane.org/gmane.linux.network/102586

Also, redefine two TCP header functions to accept TCP header pointer.
When subtracting, return signed int to allow error checking.

These functions will also be used in subsequent patches that implement
additional features.

Signed-off-by: William.Allen.Simpson@gmail.com
---
  include/linux/tcp.h  |   12 ++++++++++++
  net/ipv4/tcp_input.c |   25 ++++++++++++++++++++++++-
  2 files changed, 36 insertions(+), 1 deletions(-)