| // SPDX-License-Identifier: GPL-2.0 |
| // Simplest possible test of open() and then sendfile(). |
| // We write some zeroes into a file (since packetdrill expects payloads |
| // to be all zeroes) and then open() the file, then use sendfile() |
| // and verify that the correct number of zeroes goes out. |
| |
| `./defaults.sh |
| /bin/rm -f /tmp/testfile |
| /bin/dd bs=1 count=5 if=/dev/zero of=/tmp/testfile status=none |
| ` |
| |
| // Initialize connection |
| 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 |
| +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [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 10> |
| +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> |
| +0 < . 1:1(0) ack 1 win 514 |
| |
| +0 accept(3, ..., ...) = 4 |
| |
| +0 open("/tmp/testfile", O_RDONLY) = 5 |
| +0 sendfile(4, 5, [0], 5) = 5 |
| +0 > P. 1:6(5) ack 1 |
