| // SPDX-License-Identifier: GPL-2.0 |
| // small packet zerocopy test: |
| // |
| // verify that SO_EE_CODE_ZEROCOPY_COPIED is set on zerocopy |
| // packets of all sizes, including the smallest payload, 1B. |
| |
| `./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 |
| |
| // send 1B |
| +0 send(4, ..., 1, MSG_ZEROCOPY) = 1 |
| +0 > P. 1:2(1) ack 1 |
| +0 < . 1:1(0) ack 2 win 257 |
| |
| +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 |
| |
| // send 1B again |
| +0 send(4, ..., 1, MSG_ZEROCOPY) = 1 |
| +0 > P. 2:3(1) ack 1 |
| +0 < . 1:1(0) ack 3 win 257 |
| |
| +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=1, |
| ee_data=1}} |
| ]}, MSG_ERRQUEUE) = 0 |
