/*-
* Copyright (c) 2005 Maxim Sobolev
* 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 AND CONTRIBUTORS ``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.
*/
/*
* The reconnect regression test is designed to catch kernel bug that may
* prevent changing association of already associated datagram unix domain
* socket when server side of connection has been closed.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
static char uds_name1[] = "reconnect.XXXXXXXX";
static char uds_name2[] = "reconnect.XXXXXXXX";
#define sstosa(ss) ((struct sockaddr *)(ss))
static void
prepare_ifsun(struct sockaddr_un *ifsun, const char *path)
{
memset(ifsun, '\0', sizeof(*ifsun));
#if !defined(__linux__) && !defined(__solaris__)
ifsun->sun_len = strlen(path);
#endif
ifsun->sun_family = AF_LOCAL;
strcpy(ifsun->sun_path, path);
}
static int
create_uds_server(const char *path)
{
struct sockaddr_un ifsun;
int sock;
prepare_ifsun(&ifsun, path);
unlink(ifsun.sun_path);
sock = socket(PF_LOCAL, SOCK_DGRAM, 0);
if (sock == -1)
err(1, "can't create socket");
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &sock, sizeof(sock));
if (bind(sock, sstosa(&ifsun), sizeof(ifsun)) < 0)
err(1, "can't bind to a socket");
return sock;
}
static void
connect_uds_server(int sock, const char *path)
{
struct sockaddr_un ifsun;
int e;
prepare_ifsun(&ifsun, path);
e = connect(sock, sstosa(&ifsun), sizeof(ifsun));
if (e < 0)
err(1, "can't connect to a socket");
}
static void
cleanup(void)
{
unlink(uds_name1);
unlink(uds_name2);
}
int
main(void)
{
int s_sock1, s_sock2, c_sock;
atexit(cleanup);
if (mkstemp(uds_name1) == -1)
err(1, "mkstemp");
unlink(uds_name1);
s_sock1 = create_uds_server(uds_name1);
if (mkstemp(uds_name2) == -1)
err(1, "mkstemp");
unlink(uds_name2);
s_sock2 = create_uds_server(uds_name2);
c_sock = socket(PF_LOCAL, SOCK_DGRAM, 0);
if (c_sock < 0)
err(1, "can't create socket");
connect_uds_server(c_sock, uds_name1);
close(s_sock1);
connect_uds_server(c_sock, uds_name2);
close(s_sock2);
exit (0);
}
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