Lines 512-518
TcpL4Protocol::Receive (Ptr<Packet> pack
|
Link Here
|
---|
|
512 |
source.Print (oss); |
512 |
source.Print (oss); |
513 |
oss<<" source port: "<<tcpHeader.GetSourcePort (); |
513 |
oss<<" source port: "<<tcpHeader.GetSourcePort (); |
514 |
NS_LOG_LOGIC (oss.str ()); |
514 |
NS_LOG_LOGIC (oss.str ()); |
515 |
return Ipv4L4Protocol::RX_ENDPOINT_UNREACH; |
515 |
|
|
|
516 |
if (!(tcpHeader.GetFlags () & TcpHeader::RST)) |
517 |
{ |
518 |
// build a RST packet and send |
519 |
Ptr<Packet> rstPacket = Create<Packet> (); |
520 |
TcpHeader header; |
521 |
if (tcpHeader.GetFlags () & TcpHeader::ACK) |
522 |
{ |
523 |
// ACK bit was set |
524 |
header.SetFlags (TcpHeader::RST); |
525 |
header.SetSequenceNumber (header.GetAckNumber ()); |
526 |
} |
527 |
else |
528 |
{ |
529 |
header.SetFlags (TcpHeader::RST | TcpHeader::ACK); |
530 |
header.SetSequenceNumber (SequenceNumber (0)); |
531 |
header.SetAckNumber (header.GetSequenceNumber () + SequenceNumber (1)); |
532 |
} |
533 |
header.SetSourcePort (tcpHeader.GetDestinationPort ()); |
534 |
header.SetDestinationPort (tcpHeader.GetSourcePort ()); |
535 |
SendPacket (rstPacket, header, destination, source); |
536 |
return Ipv4L4Protocol::RX_OK; |
537 |
} |
538 |
else |
539 |
{ |
540 |
return Ipv4L4Protocol::RX_ENDPOINT_UNREACH; |
541 |
} |
516 |
} |
542 |
} |
517 |
NS_ASSERT_MSG (endPoints.size() == 1 , "Demux returned more than one endpoint"); |
543 |
NS_ASSERT_MSG (endPoints.size() == 1 , "Demux returned more than one endpoint"); |
518 |
NS_LOG_LOGIC ("TcpL4Protocol "<<this<<" forwarding up to endpoint/socket"); |
544 |
NS_LOG_LOGIC ("TcpL4Protocol "<<this<<" forwarding up to endpoint/socket"); |