1 // SPDX-License-Identifier: GPL-2.0
2 // Test TCP_INQ and TCP_CM_INQ on the client side.
3 `./defaults.sh
4 `
5
6 // Create a socket and set it to non-blocking.
7 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
8 +0 fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
9 +0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
10
11 // Connect to the server and enable TCP_INQ.
12 +0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
13 +0 setsockopt(3, SOL_TCP, TCP_INQ, [1], 4) = 0
14
15 +0 > S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
16 +.01 < S. 0:0(0) ack 1 win 5792 <mss 1460,sackOK,TS val 700 ecr 100,nop,wscale 7>
17 +0 > . 1:1(0) ack 1 <nop,nop,TS val 200 ecr 700>
18
19 // Now we have 10K of data ready on the socket.
20 +0 < . 1:10001(10000) ack 1 win 514
21 +0 > . 1:1(0) ack 10001 <nop,nop,TS val 200 ecr 700>
22
23 // We read 1K and we should have 9K ready to read.
24 +0 recvmsg(3, {msg_name(...)=...,
25 msg_iov(1)=[{..., 1000}],
26 msg_flags=0,
27 msg_control=[{cmsg_level=SOL_TCP,
28 cmsg_type=TCP_CM_INQ,
29 cmsg_data=9000}]}, 0) = 1000
30 // We read 9K and we should have no further data ready to read.
31 +0 recvmsg(3, {msg_name(...)=...,
32 msg_iov(1)=[{..., 9000}],
33 msg_flags=0,
34 msg_control=[{cmsg_level=SOL_TCP,
35 cmsg_type=TCP_CM_INQ,
36 cmsg_data=0}]}, 0) = 9000
37
38 // Server sends more data and closes the connections.
39 +0 < F. 10001:20001(10000) ack 1 win 514
40 +0 > . 1:1(0) ack 20002 <nop,nop,TS val 200 ecr 700>
41
42 // We read 10K and we should have one "fake" byte because the connection is
43 // closed.
44 +0 recvmsg(3, {msg_name(...)=...,
45 msg_iov(1)=[{..., 10000}],
46 msg_flags=0,
47 msg_control=[{cmsg_level=SOL_TCP,
48 cmsg_type=TCP_CM_INQ,
49 cmsg_data=1}]}, 0) = 10000
50 // Now, receive EOF.
51 +0 read(3, ..., 2000) = 0
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