| // SPDX-License-Identifier: GPL-2.0 |
| // Fastopen server zerocopy test: |
| // |
| // send data with MSG_FASTOPEN | MSG_ZEROCOPY and verify that the |
| // kernel returns the notification ID. |
| |
| `./defaults.sh |
| ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x207` |
| |
| // Set up a TFO server listening socket. |
| 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 |
| +.1 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 |
| +0 bind(3, ..., ...) = 0 |
| +0 listen(3, 1) = 0 |
| +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [2], 4) = 0 |
| +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0 |
| |
| // Client sends a SYN with data. |
| +.1 < S 0:1000(1000) win 32792 <mss 1460,sackOK,nop,nop> |
| +0 > S. 0:0(0) ack 1001 <mss 1460,nop,nop,sackOK> |
| |
| // Server accepts and replies with data. |
| +.005 accept(3, ..., ...) = 4 |
| +0 read(4, ..., 1024) = 1000 |
| +0 sendto(4, ..., 1000, MSG_ZEROCOPY, ..., ...) = 1000 |
| +0 > P. 1:1001(1000) ack 1001 |
| +.05 < . 1001:1001(0) ack 1001 win 32792 |
| |
| // Read from error queue: now has first zerocopy notification |
| +0.1 recvmsg(4, {msg_name(...)=..., |
| msg_iov(1)=[{...,0}], |
| msg_flags=MSG_ERRQUEUE, |
| msg_control=[ |
| {cmsg_level=CMSG_LEVEL_IP, |
| cmsg_type=CMSG_TYPE_RECVERR, |
| cmsg_data={ee_errno=0, |
| ee_origin=SO_EE_ORIGIN_ZEROCOPY, |
| ee_type=0, |
| ee_code=SO_EE_CODE_ZEROCOPY_COPIED, |
| ee_info=0, |
| ee_data=0}} |
| ]}, MSG_ERRQUEUE) = 0 |
| |
| `/tmp/sysctl_restore_${PPID}.sh` |
