1*1e42f73fSWillem de Bruijn// SPDX-License-Identifier: GPL-2.0
2*1e42f73fSWillem de Bruijn// Fastopen server zerocopy test:
3*1e42f73fSWillem de Bruijn//
4*1e42f73fSWillem de Bruijn// send data with MSG_FASTOPEN | MSG_ZEROCOPY and verify that the
5*1e42f73fSWillem de Bruijn// kernel returns the notification ID.
6*1e42f73fSWillem de Bruijn
7*1e42f73fSWillem de Bruijn`./defaults.sh
8*1e42f73fSWillem de Bruijn ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x207`
9*1e42f73fSWillem de Bruijn
10*1e42f73fSWillem de Bruijn// Set up a TFO server listening socket.
11*1e42f73fSWillem de Bruijn    0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
12*1e42f73fSWillem de Bruijn  +.1 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
13*1e42f73fSWillem de Bruijn   +0 bind(3, ..., ...) = 0
14*1e42f73fSWillem de Bruijn   +0 listen(3, 1) = 0
15*1e42f73fSWillem de Bruijn   +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [2], 4) = 0
16*1e42f73fSWillem de Bruijn   +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
17*1e42f73fSWillem de Bruijn
18*1e42f73fSWillem de Bruijn// Client sends a SYN with data.
19*1e42f73fSWillem de Bruijn  +.1 < S 0:1000(1000) win 32792 <mss 1460,sackOK,nop,nop>
20*1e42f73fSWillem de Bruijn   +0 > S. 0:0(0) ack 1001 <mss 1460,nop,nop,sackOK>
21*1e42f73fSWillem de Bruijn
22*1e42f73fSWillem de Bruijn// Server accepts and replies with data.
23*1e42f73fSWillem de Bruijn+.005 accept(3, ..., ...) = 4
24*1e42f73fSWillem de Bruijn   +0 read(4, ..., 1024) = 1000
25*1e42f73fSWillem de Bruijn   +0 sendto(4, ..., 1000, MSG_ZEROCOPY, ..., ...) = 1000
26*1e42f73fSWillem de Bruijn   +0 > P. 1:1001(1000) ack 1001
27*1e42f73fSWillem de Bruijn +.05 < . 1001:1001(0) ack 1001 win 32792
28*1e42f73fSWillem de Bruijn
29*1e42f73fSWillem de Bruijn// Read from error queue: now has first zerocopy notification
30*1e42f73fSWillem de Bruijn  +0.1 recvmsg(4, {msg_name(...)=...,
31*1e42f73fSWillem de Bruijn                  msg_iov(1)=[{...,0}],
32*1e42f73fSWillem de Bruijn                  msg_flags=MSG_ERRQUEUE,
33*1e42f73fSWillem de Bruijn                  msg_control=[
34*1e42f73fSWillem de Bruijn                      {cmsg_level=CMSG_LEVEL_IP,
35*1e42f73fSWillem de Bruijn                       cmsg_type=CMSG_TYPE_RECVERR,
36*1e42f73fSWillem de Bruijn                       cmsg_data={ee_errno=0,
37*1e42f73fSWillem de Bruijn                                  ee_origin=SO_EE_ORIGIN_ZEROCOPY,
38*1e42f73fSWillem de Bruijn                                  ee_type=0,
39*1e42f73fSWillem de Bruijn                                  ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
40*1e42f73fSWillem de Bruijn                                  ee_info=0,
41*1e42f73fSWillem de Bruijn                                  ee_data=0}}
42*1e42f73fSWillem de Bruijn                  ]}, MSG_ERRQUEUE) = 0
43*1e42f73fSWillem de Bruijn
44*1e42f73fSWillem de Bruijn`/tmp/sysctl_restore_${PPID}.sh`
45