QUIC/inet/tests/packetdrill/tcp/tcptests/tcpSend2AckSecond.pkt

// SUT is a server. It sends a packet of 2920 B to the peer, which should be
// segmented. Only the second one is acked. A retransmission should be sent after RTO-INIT, i.e. 3 secs.
// Problem: Only one packet is sent!!
// Problem is solved when tcp.increasedIWEnabled is set to true.

0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
0.000 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
0.000 bind(3, ..., ...) = 0
0.000 listen(3, 1) = 0

0.100 < S 0:0(0) win 32792 <mss 1000,nop,wscale 7,nop,nop,sackOK>
0.100 > S. 0:0(0) ack 1 <...>
0.150 < . 1:1(0) ack 1 win 257
0.150 accept(3, ..., ...) = 4

0.200 write(4, ..., 2000) = 2000
+0 > . 1:1001(1000) ack 1
+0 > . 1001:2001(1000) ack 1

0.210 < . 1:1(0) ack 1 win 257 <sack 1001:2001,nop,nop>

* > . 1:1001(1000) ack 1
4.0 < . 1:1(0) ack 2001 win 257

4.200 close(4) = 0
4.200 > F. 2001:2001(0) ack 1
4.300 < F. 1:1(0) ack 2002 win 257
4.300 > . 2002:2002(0) ack 2