57 lines
2.1 KiB
Text
57 lines
2.1 KiB
Text
// SPDX-License-Identifier: GPL-2.0
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// small packet zerocopy test:
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//
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// verify that SO_EE_CODE_ZEROCOPY_COPIED is set on zerocopy
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// packets of all sizes, including the smallest payload, 1B.
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`./defaults.sh`
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0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
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+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
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+0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0
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+0 bind(3, ..., ...) = 0
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+0 listen(3, 1) = 0
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+0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>
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+0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8>
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+0 < . 1:1(0) ack 1 win 257
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+0 accept(3, ..., ...) = 4
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// send 1B
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+0 send(4, ..., 1, MSG_ZEROCOPY) = 1
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+0 > P. 1:2(1) ack 1
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+0 < . 1:1(0) ack 2 win 257
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+1 recvmsg(4, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE,
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msg_control=[
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{cmsg_level=CMSG_LEVEL_IP,
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cmsg_type=CMSG_TYPE_RECVERR,
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cmsg_data={ee_errno=0,
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ee_origin=SO_EE_ORIGIN_ZEROCOPY,
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ee_type=0,
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ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
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ee_info=0,
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ee_data=0}}
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]}, MSG_ERRQUEUE) = 0
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// send 1B again
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+0 send(4, ..., 1, MSG_ZEROCOPY) = 1
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+0 > P. 2:3(1) ack 1
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+0 < . 1:1(0) ack 3 win 257
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+1 recvmsg(4, {msg_name(...)=...,
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msg_iov(1)=[{...,0}],
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msg_flags=MSG_ERRQUEUE,
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msg_control=[
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{cmsg_level=CMSG_LEVEL_IP,
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cmsg_type=CMSG_TYPE_RECVERR,
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cmsg_data={ee_errno=0,
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ee_origin=SO_EE_ORIGIN_ZEROCOPY,
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ee_type=0,
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ee_code=SO_EE_CODE_ZEROCOPY_COPIED,
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ee_info=1,
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ee_data=1}}
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]}, MSG_ERRQUEUE) = 0
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