tcp_timestamping_server.pkt

  1// SPDX-License-Identifier: GPL-2.0
  2// Test tx timestamping for server-side (IPv4).
  3`./defaults.sh
  4`
  5
  6// Initialize connection
  7    0	socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
  8   +0	setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
  9   +0	bind(3, ..., ...) = 0
 10   +0	listen(3, 1) = 0
 11
 12   +0	< S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 10>
 13   +0	> S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
 14 +.01	< . 1:1(0) ack 1 win 514
 15
 16   +0	accept(3, ..., ...) = 4
 17   +0	setsockopt(4, SOL_SOCKET, SO_TIMESTAMPING,
 18		   [SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE |
 19		    SOF_TIMESTAMPING_TX_ACK | SOF_TIMESTAMPING_SOFTWARE |
 20		    SOF_TIMESTAMPING_OPT_ID], 4) = 0
 21
 22// Write two 2KB chunks.
 23// setsockopt(..., [SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_OPT_ID], ...)
 24// is called after when SYN is acked. So, we expect the last byte of the first
 25// and the second chunks to have timestamp keys of 1999 (i.e., 2000 - 1) and
 26// 3999 (i.e., 4000 - 1) respectively.
 27   +0	write(4, ..., 2000) = 2000
 28   +0	write(4, ..., 2000) = 2000
 29   +0	> P. 1:2001(2000) ack 1
 30   +0	> P. 2001:4001(2000) ack 1
 31 +.01	< .  1:1(0) ack 2001 win 514
 32 +.01	< .  1:1(0) ack 4001 win 514
 33
 34// Make sure that internal TCP timestamps are not overwritten and we have sane
 35// RTT measurement.
 36   +0	%{
 37assert 5000 <= tcpi_rtt <= 20000, 'srtt=%d us' % tcpi_rtt
 38}%
 39
 40// SCM_TSTAMP_SCHED for the first chunk should be received almost immediately
 41// after write at t=10ms.
 42   +0	recvmsg(4, {msg_name(...)=...,
 43		    msg_iov(1)=[{...,0}],
 44                    msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
 45                    msg_control=[
 46			{cmsg_level=SOL_SOCKET,
 47			 cmsg_type=SCM_TIMESTAMPING,
 48			 cmsg_data={scm_sec=0,scm_nsec=10000000}},
 49			{cmsg_level=CMSG_LEVEL_IP,
 50			 cmsg_type=CMSG_TYPE_RECVERR,
 51			 cmsg_data={ee_errno=ENOMSG,
 52				    ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
 53				    ee_type=0,
 54				    ee_code=0,
 55				    ee_info=SCM_TSTAMP_SCHED,
 56				    ee_data=1999}}
 57		    ]}, MSG_ERRQUEUE) = 0
 58// SCM_TSTAMP_SND for the first chunk should be received almost immediately
 59// after write at t=10ms.
 60   +0	recvmsg(4, {msg_name(...)=...,
 61		    msg_iov(1)=[{...,0}],
 62                    msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
 63                    msg_control=[
 64			{cmsg_level=SOL_SOCKET,
 65			 cmsg_type=SCM_TIMESTAMPING,
 66			 cmsg_data={scm_sec=0,scm_nsec=10000000}},
 67			{cmsg_level=CMSG_LEVEL_IP,
 68			 cmsg_type=CMSG_TYPE_RECVERR,
 69			 cmsg_data={ee_errno=ENOMSG,
 70				    ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
 71				    ee_type=0,
 72				    ee_code=0,
 73				    ee_info=SCM_TSTAMP_SND,
 74				    ee_data=1999}}
 75		    ]}, MSG_ERRQUEUE) = 0
 76// SCM_TSTAMP_SCHED for the second chunk should be received almost immediately
 77// after that at t=10ms.
 78   +0	recvmsg(4, {msg_name(...)=...,
 79		    msg_iov(1)=[{...,0}],
 80                    msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
 81                    msg_control=[
 82			{cmsg_level=SOL_SOCKET,
 83			 cmsg_type=SCM_TIMESTAMPING,
 84			 cmsg_data={scm_sec=0,scm_nsec=10000000}},
 85			{cmsg_level=CMSG_LEVEL_IP,
 86			 cmsg_type=CMSG_TYPE_RECVERR,
 87			 cmsg_data={ee_errno=ENOMSG,
 88				    ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
 89				    ee_type=0,
 90				    ee_code=0,
 91				    ee_info=SCM_TSTAMP_SCHED,
 92				    ee_data=3999}}
 93		    ]}, MSG_ERRQUEUE) = 0
 94// SCM_TSTAMP_SND for the second chunk should be received almost immediately
 95// after that at t=10ms.
 96   +0	recvmsg(4, {msg_name(...)=...,
 97		    msg_iov(1)=[{...,0}],
 98                    msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
 99                    msg_control=[
100			{cmsg_level=SOL_SOCKET,
101			 cmsg_type=SCM_TIMESTAMPING,
102			 cmsg_data={scm_sec=0,scm_nsec=10000000}},
103			{cmsg_level=CMSG_LEVEL_IP,
104			 cmsg_type=CMSG_TYPE_RECVERR,
105			 cmsg_data={ee_errno=ENOMSG,
106				    ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
107				    ee_type=0,
108				    ee_code=0,
109				    ee_info=SCM_TSTAMP_SND,
110				    ee_data=3999}}
111		    ]}, MSG_ERRQUEUE) = 0
112// SCM_TSTAMP_ACK for the first chunk should be received at t=20ms.
113   +0	recvmsg(4, {msg_name(...)=...,
114		    msg_iov(1)=[{...,0}],
115                    msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
116                    msg_control=[
117			{cmsg_level=SOL_SOCKET,
118			 cmsg_type=SCM_TIMESTAMPING,
119			 cmsg_data={scm_sec=0,scm_nsec=20000000}},
120			{cmsg_level=CMSG_LEVEL_IP,
121			 cmsg_type=CMSG_TYPE_RECVERR,
122			 cmsg_data={ee_errno=ENOMSG,
123				    ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
124				    ee_type=0,
125				    ee_code=0,
126				    ee_info=SCM_TSTAMP_ACK,
127				    ee_data=1999}}
128		    ]}, MSG_ERRQUEUE) = 0
129// SCM_TSTAMP_ACK for the second chunk should be received at t=30ms.
130   +0	recvmsg(4, {msg_name(...)=...,
131		    msg_iov(1)=[{...,0}],
132                    msg_flags=MSG_ERRQUEUE|MSG_TRUNC,
133                    msg_control=[
134			{cmsg_level=SOL_SOCKET,
135			 cmsg_type=SCM_TIMESTAMPING,
136			 cmsg_data={scm_sec=0,scm_nsec=30000000}},
137			{cmsg_level=CMSG_LEVEL_IP,
138			 cmsg_type=CMSG_TYPE_RECVERR,
139			 cmsg_data={ee_errno=ENOMSG,
140				    ee_origin=SO_EE_ORIGIN_TIMESTAMPING,
141				    ee_type=0,
142				    ee_code=0,
143				    ee_info=SCM_TSTAMP_ACK,
144				    ee_data=3999}}
145		    ]}, MSG_ERRQUEUE) = 0