tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2// Test TCP does not append any data from consequent writes to the tail
3// skb created for the chunk.
4`./defaults.sh
5`
6
7// Initialize connection
8 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
9 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
10 +0 bind(3, ..., ...) = 0
11 +0 listen(3, 1) = 0
12
13 +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 10>
14 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
15 +.01 < . 1:1(0) ack 1 win 514
16
17 +0 accept(3, ..., ...) = 4
18
19// Write a 10400B chunk to fill the ICW, and have a 400 byte skb sitting on
20// the tail.
21 +0 write(4, ..., 10400) = 10400
22
23// Write a 400B chunk with no coalescing options.
24 +0 send(4, ..., 400, MSG_EOR) = 400
25
26// This chunk should not be appended to the skbs created for the previous chunk.
27 +0 write(4, ..., 10000) = 10000
28
29 +0 > P. 1:10001(10000) ack 1
30+.001 < . 1:1(0) ack 10001 win 514
31// Now we have enough room to send out the 2 x 400B packets out.
32 +0 > P. 10001:10801(800) ack 1
33 +0 > P. 10801:20801(10000) ack 1
34+.001 < . 1:1(0) ack 10401 win 514
35+.001 < . 1:1(0) ack 10801 win 514
36+.001 < . 1:1(0) ack 20801 win 514