diff options
Diffstat (limited to 'tools/testing/selftests/net/packetdrill/tcp_user_timeout_user_timeout.pkt')
| -rw-r--r-- | tools/testing/selftests/net/packetdrill/tcp_user_timeout_user_timeout.pkt | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/packetdrill/tcp_user_timeout_user_timeout.pkt b/tools/testing/selftests/net/packetdrill/tcp_user_timeout_user_timeout.pkt new file mode 100644 index 000000000000..2efe02bfba9c --- /dev/null +++ b/tools/testing/selftests/net/packetdrill/tcp_user_timeout_user_timeout.pkt @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0 +`./defaults.sh` + +// Initialize 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 <mss 1000,sackOK,nop,nop> + +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK> + +.1 < . 1:1(0) ack 1 win 32792 + + + +0 accept(3, ..., ...) = 4 + +// Okay, we received nothing, and decide to close this idle socket. +// We set TCP_USER_TIMEOUT to 3 seconds because really it is not worth +// trying hard to cleanly close this flow, at the price of keeping +// a TCP structure in kernel for about 1 minute ! + +2 setsockopt(4, SOL_TCP, TCP_USER_TIMEOUT, [3000], 4) = 0 + +0 close(4) = 0 + + +0 > F. 1:1(0) ack 1 + +.3~+.400 > F. 1:1(0) ack 1 + +.3~+.400 > F. 1:1(0) ack 1 + +.6~+.800 > F. 1:1(0) ack 1 + +// We finally receive something from the peer, but it is way too late +// Our socket vanished because TCP_USER_TIMEOUT was really small + +0 < . 1:2(1) ack 1 win 32792 + +0 > R 1:1(0) |