[lwip-devel] [task #14128] Appropriate byte counting/stretch ACK support

[Joel Cunningham]

Follow-up Comment #17, task #14128 (project lwip):

Simon,

Thanks for catching L=1*SMSS following a RTO.  I'll account for this in an
updated patch.  I think we can appropriately detect this scenario by checking
the unsent queue for segments where the sequence number is less than
pcb->snd_nxt.  This would only happen after an RTO and all unacked segments
have been moved back to the unsent queue

In terms of TCP_ABC_LIMIT.  I was thinking of leaving it as an option in order
to allow for a port to use L of 1 in cases where they want ABC to protect
against ACK division, but not deviate from RFC 5681 (which recommends cwnd +=
min(acked, 1*SMSS).  Leaving L as configurable also would allow a port to
account for a larger number (> 2*SMSS) of stretch ACKs if there is a scenario
where this is desirable/valid

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/task/?14128>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.nongnu.org/