From 78c896b3b3127515478090c19447e27dc406427e Mon Sep 17 00:00:00 2001 From: Jianfeng Tan Date: Mon, 18 Nov 2019 06:59:50 +0000 Subject: TLDKv2 Signed-off-by: Jianfeng Tan Signed-off-by: Jielong Zhou Signed-off-by: Jian Zhang Signed-off-by: Chen Zhao Change-Id: I55c39de4c6cd30f991f35631eb507f770230f08e --- .../tests/bsd/fast_retransmit/fr-4pkt-sack-bsd.pkt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 test/packetdrill/tests/bsd/fast_retransmit/fr-4pkt-sack-bsd.pkt (limited to 'test/packetdrill/tests/bsd/fast_retransmit/fr-4pkt-sack-bsd.pkt') diff --git a/test/packetdrill/tests/bsd/fast_retransmit/fr-4pkt-sack-bsd.pkt b/test/packetdrill/tests/bsd/fast_retransmit/fr-4pkt-sack-bsd.pkt new file mode 100644 index 0000000..1980739 --- /dev/null +++ b/test/packetdrill/tests/bsd/fast_retransmit/fr-4pkt-sack-bsd.pkt @@ -0,0 +1,38 @@ +// Test fast retransmit with 4 packets outstanding, receiver sending SACKs. +// In this variant the receiver supports SACK. + +// Establish a connection. +0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 ++0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 + ++0 bind(3, ..., ...) = 0 ++0 listen(3, 1) = 0 + ++0 < S 0:0(0) win 32792 ++0 > S. 0:0(0) ack 1 <...> + ++.1 < . 1:1(0) ack 1 win 257 ++0 accept(3, ..., ...) = 4 + +// Send 1 data segment and get an ACK, so cwnd is now 4. ++0 write(4, ..., 1000) = 1000 ++0 > P. 1:1001(1000) ack 1 + ++.1 < . 1:1(0) ack 1001 win 257 + +// Write 4 data segments. ++0 write(4, ..., 4000) = 4000 ++0 > . 1001:2001(1000) ack 1 ++0 > . 2001:3001(1000) ack 1 ++0 > . 3001:4001(1000) ack 1 ++0 > P. 4001:5001(1000) ack 1 + +// Get 3 SACKs. ++.1 < . 1:1(0) ack 1001 win 257 ++0 < . 1:1(0) ack 1001 win 257 ++0 < . 1:1(0) ack 1001 win 257 +// We've received 3 duplicate ACKs, so we do a fast retransmit. ++0 > . 1001:2001(1000) ack 1 + +// Receiver ACKs all data. ++.1 < . 1:1(0) ack 6001 win 257 -- cgit 1.2.3-korg