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- // 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.
- --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
- // 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
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