summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/net/packetdrill/tcp_eor_no-coalesce-large.pkt
blob: f95b9b3c9fa1736faa8e09862f3c4ec38c85d68c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
// SPDX-License-Identifier: GPL-2.0
// Test TCP does not append any data from consequent writes to the tail
// skb created for the chunk. The large chunk itself should be packetized as
// usual.
`./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,nop,wscale 10>
   +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
 +.01 < . 1:1(0) ack 1 win 514

   +0 accept(3, ..., ...) = 4

// Write a 10400B chunk to fill the ICW, and have a 400 byte skb sitting on
// the tail.
   +0 write(4, ..., 10400) = 10400

// Write another 10040B chunk with no coalescing options.
   +0 send(4, ..., 10400, MSG_EOR) = 10400

// Write a 2KB chunk. This chunk should not be appended to the packets created
// the previous chunk.
   +0 write(4, ..., 2000) = 2000

   +0 > P. 1:10001(10000) ack 1
+.001 < .  1:1(0) ack 10001 win 514
// Now we have enough room to send out the 2 x 400B packets out.
   +0 > P. 10001:20801(10800) ack 1
+.001 < .  1:1(0) ack 20801 win 514
// This 2KB packet should be sent alone.
   +0 > P. 20801:22801(2000) ack 1
+.001 < .  1:1(0) ack 22801 win 514