diff options
Diffstat (limited to 'tools/testing/selftests/net/packetdrill/tcp_sack_sack-route-refresh-ip-tos.pkt')
| -rw-r--r-- | tools/testing/selftests/net/packetdrill/tcp_sack_sack-route-refresh-ip-tos.pkt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/packetdrill/tcp_sack_sack-route-refresh-ip-tos.pkt b/tools/testing/selftests/net/packetdrill/tcp_sack_sack-route-refresh-ip-tos.pkt new file mode 100644 index 000000000000..310ef31518da --- /dev/null +++ b/tools/testing/selftests/net/packetdrill/tcp_sack_sack-route-refresh-ip-tos.pkt @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0 +// Verify that setsockopt calls that force a route refresh do not +// cause problems matching SACKs with packets in the write queue. +// This variant tests IP_TOS. + +`./defaults.sh` + +// Establish a connection. + 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 + +0 setsockopt(3, SOL_IP, IP_MTU_DISCOVER, [IP_PMTUDISC_DONT], 1) = 0 + +0...0.010 connect(3, ..., ...) = 0 + + +0 > S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8> + +.01 < S. 0:0(0) ack 1 win 65535 <mss 1460,nop,wscale 2,nop,nop,sackOK> + +0 > . 1:1(0) ack 1 + + +.01 write(3, ..., 5840) = 5840 + +0 > P. 1:5841(5840) ack 1 + +.01 < . 1:1(0) ack 5841 win 65535 + + +.01 write(3, ..., 5840) = 5840 + +0 > P. 5841:11681(5840) ack 1 + +.01 < . 1:1(0) ack 11681 win 65535 + + +.01 write(3, ..., 14600) = 14600 + +0 > P. 11681:26281(14600) ack 1 + +// Try the socket option that we know can force a route refresh. + +0 setsockopt(3, SOL_IP, IP_TOS, [4], 1) = 0 +// Then revert to avoid routing/mangling/etc implications of that setting. + +0 setsockopt(3, SOL_IP, IP_TOS, [0], 1) = 0 + +// Verify that we do not retransmit the SACKed segments. + +.01 < . 1:1(0) ack 13141 win 65535 <sack 16061:17521 20441:26281,nop,nop> + +0 > . 13141:16061(2920) ack 1 + +0 > P. 17521:20441(2920) ack 1 + +.01 < . 1:1(0) ack 26281 win 65535 |