1// SPDX-License-Identifier: GPL-2.0 2// Test that we correctly skip zero-length IOVs. 3`./defaults.sh` 4 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 5 +0 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, [1], 4) = 0 6 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 7 +0 bind(3, ..., ...) = 0 8 +0 listen(3, 1) = 0 9 10 +0 < S 0:0(0) win 32792 <mss 1000,nop,wscale 7> 11 +0 > S. 0:0(0) ack 1 <mss 1460,nop,wscale 8> 12 +.01 < . 1:1(0) ack 1 win 257 13 +0 accept(3, ..., ...) = 4 14 +0 setsockopt(4, SOL_TCP, TCP_NODELAY, [1], 4) = 0 15 16 +0 sendmsg(4, {msg_name(...)=..., 17 msg_iov(4)=[{..., 0}, {..., 40}, {..., 0}, {..., 20}], 18 msg_flags=0}, 0) = 60 19 +0 > P. 1:61(60) ack 1 20 +.01 < . 1:1(0) ack 61 win 257 21 22 +0 sendmsg(4, {msg_name(...)=..., 23 msg_iov(4)=[{..., 0}, {..., 0}, {..., 0}, {..., 0}], 24 msg_flags=0}, MSG_ZEROCOPY) = 0 25 26 +0 sendmsg(4, {msg_name(...)=..., 27 msg_iov(4)=[{..., 0}, {..., 10}, {..., 0}, {..., 50}], 28 msg_flags=0}, MSG_ZEROCOPY) = 60 29 +0 > P. 61:121(60) ack 1 30 +.01 < . 1:1(0) ack 121 win 257 31