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// SPDX-License-Identifier: GPL-2.0
// Test tx timestamping for partial writes (IPv4).
`./defaults.sh
`
// Create a socket and set it to non-blocking.
0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0 fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
+0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
// Establish connection and verify that there was no error.
+0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
+0 > S 0:0(0) <mss 1460,sackOK,TS val 100 ecr 0,nop,wscale 8>
+.01 < S. 0:0(0) ack 1 win 2000 <mss 1000,sackOK,TS val 700 ecr 100,nop,wscale 7>
+0 > . 1:1(0) ack 1 <nop,nop,TS val 200 ecr 700>
+0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
+0 setsockopt(3, SOL_SOCKET, SO_SNDBUF, [1000], 4) = 0
+0 setsockopt(3, SOL_SOCKET, SO_TIMESTAMPING,
[SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_TX_ACK | SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_OPT_ID], 4) = 0
// We have a partial write.
+0 write(3, ..., 10000) = 2964
+0 > . 1:989(988) ack 1 <nop,nop,TS val 110 ecr 700>
+0 > P. 989:1977(988) ack 1 <nop,nop,TS val 110 ecr 700>
+.01 < . 1:1(0) ack 1977 win 92 <nop,nop,TS val 800 ecr 200>
+0 > P. 1977:2965(988) ack 1 <nop,nop,TS val 114 ecr 800>
+.01 < . 1:1(0) ack 2965 win 92 <nop,nop,TS val 800 ecr 200>
// Make sure that internal TCP timestamps are not overwritten and we have sane
// RTT measurement.
+0 %{
assert 5000 <= tcpi_rtt <= 20000, 'srtt=%d us' % tcpi_rtt
}%
// SCM_TSTAMP_SCHED for the first chunk should be received almost immediately
// after the first ack at t=20ms.
+0 recvmsg(3, {msg_name(...)=...,
msg_iov(1)=[{...,0}],
msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
msg_control=[
{cmsg_level=SOL_SOCKET,
cmsg_type=SCM_TIMESTAMPING,
cmsg_data={scm_sec=0,scm_nsec=20000000}},
{cmsg_level=CMSG_LEVEL_IP,
cmsg_type=CMSG_TYPE_RECVERR,
cmsg_data={ee_errno=ENOMSG,
ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
ee_type=0,
ee_code=0,
ee_info=SCM_TSTAMP_SCHED,
ee_data=2963}}
]}, MSG_ERRQUEUE) = 0
// SCM_TSTAMP_SND for the first chunk should be received almost immediately
// after the first ack at t=20ms.
+0 recvmsg(3, {msg_name(...)=...,
msg_iov(1)=[{...,0}],
msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
msg_control=[
{cmsg_level=SOL_SOCKET,
cmsg_type=SCM_TIMESTAMPING,
cmsg_data={scm_sec=0,scm_nsec=20000000}},
{cmsg_level=CMSG_LEVEL_IP,
cmsg_type=CMSG_TYPE_RECVERR,
cmsg_data={ee_errno=ENOMSG,
ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
ee_type=0,
ee_code=0,
ee_info=SCM_TSTAMP_SND,
ee_data=2963}}
]}, MSG_ERRQUEUE) = 0
// SCM_TSTAMP_ACK for the first chunk should be received after the last ack at
// t=30ms.
+0 recvmsg(3, {msg_name(...)=...,
msg_iov(1)=[{...,0}],
msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
msg_control=[
{cmsg_level=SOL_SOCKET,
cmsg_type=SCM_TIMESTAMPING,
cmsg_data={scm_sec=0,scm_nsec=30000000}},
{cmsg_level=CMSG_LEVEL_IP,
cmsg_type=CMSG_TYPE_RECVERR,
cmsg_data={ee_errno=ENOMSG,
ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
ee_type=0,
ee_code=0,
ee_info=SCM_TSTAMP_ACK,
ee_data=2963}}
]}, MSG_ERRQUEUE) = 0
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