| // SPDX-License-Identifier: GPL-2.0 |
| // Test that tx timestamping sends timestamps only for |
| // the last byte of each sendmsg. |
| `./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 20000 <mss 1000,nop,nop,sackOK> |
| +0 > . 1:1(0) ack 1 |
| +0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0 |
| +0 fcntl(3, F_SETFL, O_RDWR) = 0 // set back to blocking |
| |
| +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 |
| |
| +0 write(3, ..., 11000) = 11000 |
| +0 > P. 1:10001(10000) ack 1 |
| +.01 < . 1:1(0) ack 10001 win 4000 |
| +0 > P. 10001:11001(1000) ack 1 |
| +.01 < . 1:1(0) ack 11001 win 4000 |
| |
| // 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 last byte should be received almost immediately |
| // once 10001 is acked at t=20ms. |
| // setsockopt(..., [SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_OPT_ID], ...) |
| // is called after when SYN is acked. So, we expect the last byte of the first |
| // chunk to have a timestamp key of 10999 (i.e., 11000 - 1). |
| +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=10999}} |
| ]}, MSG_ERRQUEUE) = 0 |
| // SCM_TSTAMP_SND for the last byte should be received almost immediately |
| // once 10001 is acked 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=10999}} |
| ]}, MSG_ERRQUEUE) = 0 |
| // SCM_TSTAMP_ACK for the last byte should be received 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=10999}} |
| ]}, MSG_ERRQUEUE) = 0 |
