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511ad4c264
Commit f5fda1a868 ("selftests/net: packetdrill: add tcp_rcv_big_endseq.pkt")
added this test recently, but it's failing with:
# tcp_rcv_big_endseq.pkt:41: error handling packet: timing error: expected outbound packet at 1.230105 sec but happened at 1.190101 sec; tolerance 0.005046 sec
# script packet: 1.230105 . 1:1(0) ack 54001 win 0
# actual packet: 1.190101 . 1:1(0) ack 54001 win 0
It's unclear why the test expects the ack to be delayed.
Correct it.
Link: https://patch.msgid.link/20250715142849.959444-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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--mss=1000
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`./defaults.sh`
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0 `nstat -n`
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// Establish a connection.
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+0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 setsockopt(3, SOL_SOCKET, SO_RCVBUF, [10000], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+0 < S 0:0(0) win 32792 <mss 1000,nop,wscale 7>
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+0 > S. 0:0(0) ack 1 <mss 1460,nop,wscale 0>
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+.1 < . 1:1(0) ack 1 win 257
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+0 accept(3, ..., ...) = 4
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+0 < P. 1:4001(4000) ack 1 win 257
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+0 > . 1:1(0) ack 4001 win 5000
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// packet in sequence : SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE / LINUX_MIB_BEYOND_WINDOW
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+0 < P. 4001:54001(50000) ack 1 win 257
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+0 > . 1:1(0) ack 4001 win 5000
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// ooo packet. : SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE / LINUX_MIB_BEYOND_WINDOW
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+1 < P. 5001:55001(50000) ack 1 win 257
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+0 > . 1:1(0) ack 4001 win 5000
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// SKB_DROP_REASON_TCP_INVALID_SEQUENCE / LINUX_MIB_BEYOND_WINDOW
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+0 < P. 70001:80001(10000) ack 1 win 257
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+0 > . 1:1(0) ack 4001 win 5000
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+0 read(4, ..., 100000) = 4000
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// If queue is empty, accept a packet even if its end_seq is above wup + rcv_wnd
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+0 < P. 4001:54001(50000) ack 1 win 257
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+0 > . 1:1(0) ack 54001 win 0
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// Check LINUX_MIB_BEYOND_WINDOW has been incremented 3 times.
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+0 `nstat | grep TcpExtBeyondWindow | grep -q " 3 "`
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