| // SPDX-License-Identifier: GPL-2.0 | |
| // basic zerocopy test: | |
| // | |
| // send a packet with MSG_ZEROCOPY and receive the notification ID | |
| // repeat and verify IDs are consecutive | |
| --send_omit_free // do not reuse send buffers with zerocopy | |
| `./defaults.sh` | |
| 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 | |
| +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 | |
| +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0 | |
| +0 bind(3, ..., ...) = 0 | |
| +0 listen(3, 1) = 0 | |
| +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> | |
| +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> | |
| +0 < . 1:1(0) ack 1 win 257 | |
| +0 accept(3, ..., ...) = 4 | |
| +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 | |
| +0 > P. 1:4001(4000) ack 1 | |
| +0 < . 1:1(0) ack 4001 win 257 | |
| +0 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 | |
| +0 send(4, ..., 4000, MSG_ZEROCOPY) = 4000 | |
| +0 > P. 4001:8001(4000) ack 1 | |
| +0 < . 1:1(0) ack 8001 win 257 | |
| +0 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=1, | |
| ee_data=1}} | |
| ]}, MSG_ERRQUEUE) = 0 |