diff options
Diffstat (limited to 'pkg/tcpip/transport/tcp')
| -rw-r--r-- | pkg/tcpip/transport/tcp/rcv.go | 19 |
1 files changed, 1 insertions, 18 deletions
diff --git a/pkg/tcpip/transport/tcp/rcv.go b/pkg/tcpip/transport/tcp/rcv.go index a4b73b588..6fe97fefd 100644 --- a/pkg/tcpip/transport/tcp/rcv.go +++ b/pkg/tcpip/transport/tcp/rcv.go @@ -70,24 +70,7 @@ func newReceiver(ep *endpoint, irs seqnum.Value, rcvWnd seqnum.Size, rcvWndScale // acceptable checks if the segment sequence number range is acceptable // according to the table on page 26 of RFC 793. func (r *receiver) acceptable(segSeq seqnum.Value, segLen seqnum.Size) bool { - return Acceptable(segSeq, segLen, r.rcvNxt, r.rcvAcc) -} - -// Acceptable checks if a segment that starts at segSeq and has length segLen is -// "acceptable" for arriving in a receive window that starts at rcvNxt and ends -// before rcvAcc, according to the table on page 26 and 69 of RFC 793. -func Acceptable(segSeq seqnum.Value, segLen seqnum.Size, rcvNxt, rcvAcc seqnum.Value) bool { - if rcvNxt == rcvAcc { - return segLen == 0 && segSeq == rcvNxt - } - if segLen == 0 { - // rcvWnd is incremented by 1 because that is Linux's behavior despite the - // RFC. - return segSeq.InRange(rcvNxt, rcvAcc.Add(1)) - } - // Page 70 of RFC 793 allows packets that can be made "acceptable" by trimming - // the payload, so we'll accept any payload that overlaps the receieve window. - return rcvNxt.LessThan(segSeq.Add(segLen)) && segSeq.LessThan(rcvAcc) + return header.Acceptable(segSeq, segLen, r.rcvNxt, r.rcvAcc) } // getSendParams returns the parameters needed by the sender when building |