Take IP options into account when calculating the allowable length of the TCP payload.  See RFC1122 section 4.2.2.6 .  This allows Path MTU discovery to be used along with IP options.
Take IP options into account when calculating the allowable length
of the TCP payload.  See RFC1122 section 4.2.2.6 .  This allows
Path MTU discovery to be used along with IP options.

PR:		problem discovered by Kevin Lahey <a3208dff4ea054ee4a817a4fbdbbae758f79bdfb@nas.nasa.gov>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase