2ba5c2107e
other until the window is closed. Then one of the sockets is closed, which will generate a RST once the TCP at the other socket does a window probe. All versions of FreeBSD prior to 11/26/2004 will ignore this RST into a 0 window, causing the connection (and application) to hang indefinitely. On patched versions of FreeBSD (and other operating systems), the RST will be accepted and the program will exit in a few seconds. Submitted by: Michiel Boland Reviewed by: silby
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
|
|
Copyright 2004 Michiel Boland. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
|
|
OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
|
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
$FreeBSD$
|
|
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <fcntl.h>
|
|
#include <poll.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* The following code sets up two connected TCP sockets that send data to each
|
|
* other until the window is closed. Then one of the sockets is closed, which
|
|
* will generate a RST once the TCP at the other socket does a window probe.
|
|
*
|
|
* All versions of FreeBSD prior to 11/26/2004 will ignore this RST into a 0
|
|
* window, causing the connection (and application) to hang indefinitely.
|
|
* On patched versions of FreeBSD (and other operating systems), the RST
|
|
* will be accepted and the program will exit in a few seconds.
|
|
*/
|
|
|
|
/*
|
|
* If the alarm fired then we've hung and the test failed.
|
|
*/
|
|
void
|
|
do_alrm(int s)
|
|
{
|
|
printf("not ok 1 - tcpfullwindowrst\n");
|
|
exit(0);
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
int o, s, t, u, do_t, do_u;
|
|
struct pollfd pfd[2];
|
|
struct sockaddr_in sa;
|
|
char buf[4096];
|
|
|
|
printf("1..1\n");
|
|
signal(SIGALRM, do_alrm);
|
|
alarm(20);
|
|
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s == -1)
|
|
return 1;
|
|
o = 1;
|
|
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &o, sizeof o);
|
|
memset(&sa, 0, sizeof sa);
|
|
sa.sin_family = AF_INET;
|
|
sa.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
|
sa.sin_port = htons(3737);
|
|
if (bind(s, (struct sockaddr *) &sa, sizeof sa) == -1)
|
|
return 1;
|
|
if (listen(s, 1) == -1)
|
|
return 1;
|
|
t = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (t == -1)
|
|
return 1;
|
|
if (connect(t, (struct sockaddr *) &sa, sizeof sa) == -1)
|
|
return 1;
|
|
u = accept(s, 0, 0);
|
|
if (u == -1)
|
|
return 1;
|
|
close(s);
|
|
fcntl(t, F_SETFL, fcntl(t, F_GETFL) | O_NONBLOCK);
|
|
fcntl(u, F_SETFL, fcntl(t, F_GETFL) | O_NONBLOCK);
|
|
do_t = 1;
|
|
do_u = 1;
|
|
pfd[0].fd = t;
|
|
pfd[0].events = POLLOUT;
|
|
pfd[1].fd = u;
|
|
pfd[1].events = POLLOUT;
|
|
while (do_t || do_u) {
|
|
if (poll(pfd, 2, 1000) == 0) {
|
|
if (do_t) {
|
|
close(t);
|
|
pfd[0].fd = -1;
|
|
do_t = 0;
|
|
}
|
|
continue;
|
|
}
|
|
if (pfd[0].revents & POLLOUT) {
|
|
if (write(t, buf, sizeof buf) == -1) {
|
|
close(t);
|
|
pfd[0].fd = -1;
|
|
do_t = 0;
|
|
}
|
|
}
|
|
if (pfd[1].revents & POLLOUT) {
|
|
if (write(u, buf, sizeof buf) == -1) {
|
|
close(u);
|
|
pfd[1].fd = -1;
|
|
do_u = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
printf("ok 1 - tcpfullwindowrst\n");
|
|
return 0;
|
|
}
|