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1// SPDX-License-Identifier: GPL-2.02// Minimal client-side zerocopy test3 4`./defaults.sh`5 6 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 47 +0 setsockopt(4, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 08 +0...0 connect(4, ..., ...) = 09 10 +0 > S 0:0(0) <mss 1460,sackOK,TS val 0 ecr 0,nop,wscale 8>11 +0 < S. 0:0(0) ack 1 win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7>12 +0 > . 1:1(0) ack 113 14 +0 send(4, ..., 4000, MSG_ZEROCOPY) = 400015 +0 > P. 1:4001(4000) ack 116 +0 < . 1:1(0) ack 4001 win 25717 18 +0 recvmsg(4, {msg_name(...)=...,19 msg_iov(1)=[{...,0}],20 msg_flags=MSG_ERRQUEUE,21 msg_control=[22 {cmsg_level=CMSG_LEVEL_IP,23 cmsg_type=CMSG_TYPE_RECVERR,24 cmsg_data={ee_errno=0,25 ee_origin=SO_EE_ORIGIN_ZEROCOPY,26 ee_type=0,27 ee_code=SO_EE_CODE_ZEROCOPY_COPIED,28 ee_info=0,29 ee_data=0}}30 ]}, MSG_ERRQUEUE) = 031