133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/*
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Copyright 2004 Michiel Boland. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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$FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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* The following code sets up two connected TCP sockets that send data to each
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* other until the window is closed. Then one of the sockets is closed, which
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* will generate a RST once the TCP at the other socket does a window probe.
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*
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* All versions of FreeBSD prior to 11/26/2004 will ignore this RST into a 0
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* window, causing the connection (and application) to hang indefinitely.
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* On patched versions of FreeBSD (and other operating systems), the RST
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* will be accepted and the program will exit in a few seconds.
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*/
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/*
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* If the alarm fired then we've hung and the test failed.
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*/
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void
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do_alrm(int s)
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{
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printf("not ok 1 - tcpfullwindowrst\n");
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exit(0);
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}
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int
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main(void)
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{
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int o, s, t, u, do_t, do_u;
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struct pollfd pfd[2];
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struct sockaddr_in sa;
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char buf[4096];
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printf("1..1\n");
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signal(SIGALRM, do_alrm);
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alarm(20);
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s = socket(AF_INET, SOCK_STREAM, 0);
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if (s == -1)
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return 1;
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o = 1;
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &o, sizeof o);
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memset(&sa, 0, sizeof sa);
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sa.sin_family = AF_INET;
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sa.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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sa.sin_port = htons(3737);
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if (bind(s, (struct sockaddr *) &sa, sizeof sa) == -1)
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return 1;
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if (listen(s, 1) == -1)
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return 1;
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t = socket(AF_INET, SOCK_STREAM, 0);
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if (t == -1)
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return 1;
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if (connect(t, (struct sockaddr *) &sa, sizeof sa) == -1)
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return 1;
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u = accept(s, 0, 0);
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if (u == -1)
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return 1;
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close(s);
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fcntl(t, F_SETFL, fcntl(t, F_GETFL) | O_NONBLOCK);
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fcntl(u, F_SETFL, fcntl(t, F_GETFL) | O_NONBLOCK);
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do_t = 1;
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do_u = 1;
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pfd[0].fd = t;
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pfd[0].events = POLLOUT;
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pfd[1].fd = u;
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pfd[1].events = POLLOUT;
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while (do_t || do_u) {
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if (poll(pfd, 2, 1000) == 0) {
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if (do_t) {
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close(t);
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pfd[0].fd = -1;
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do_t = 0;
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}
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continue;
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}
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if (pfd[0].revents & POLLOUT) {
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if (write(t, buf, sizeof buf) == -1) {
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close(t);
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pfd[0].fd = -1;
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do_t = 0;
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}
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}
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if (pfd[1].revents & POLLOUT) {
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if (write(u, buf, sizeof buf) == -1) {
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close(u);
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pfd[1].fd = -1;
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do_u = 0;
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}
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}
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}
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printf("ok 1 - tcpfullwindowrst\n");
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return 0;
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}
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