/*-
* Copyright (c) 2008 Robert N. M. Watson
* 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.
*/
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/*
* The UDP code allows transmitting zero-byte datagrams, but are they
* received?
*/
#define THEPORT 9543 /* Arbitrary. */
static void
usage(void)
{
errx(-1, "no arguments allowed\n");
}
static void
test(int domain, const char *domainstr, struct sockaddr *sa, socklen_t salen)
{
int sock_send, sock_receive;
ssize_t size;
sock_send = socket(domain, SOCK_DGRAM, 0);
if (sock_send < 0)
err(-1, "socket(%s, SOCK_DGRAM, 0)", domainstr);
sock_receive = socket(domain, SOCK_DGRAM, 0);
if (sock_receive < 0)
err(-1, "socket(%s, SOCK_DGRAM, 0)", domainstr);
if (bind(sock_receive, sa, salen) < 0)
err(-1, "Protocol %s bind(sock_receive)", domainstr);
if (fcntl(sock_receive, F_SETFL, O_NONBLOCK, 1) < 0)
err(-1, "Protocll %s fcntl(sock_receive, FL_SETFL, "
"O_NONBLOCK)", domainstr);
if (connect(sock_send, sa, salen) < 0)
err(-1, "Protocol %s connect(sock_send)", domainstr);
size = recv(sock_receive, NULL, 0, 0);
if (size > 0)
errx(-1, "Protocol %s recv(sock_receive, NULL, 0) before: %zd",
domainstr, size);
else if (size < 0)
err(-1, "Protocol %s recv(sock_receive, NULL, 0) before",
domainstr);
size = send(sock_send, NULL, 0, 0);
if (size < 0)
err(-1, "Protocol %s send(sock_send, NULL, 0)", domainstr);
(void)sleep(1);
size = recv(sock_receive, NULL, 0, 0);
if (size < 0)
err(-1, "Protocol %s recv(sock_receive, NULL, 0) test",
domainstr);
size = recv(sock_receive, NULL, 0, 0);
if (size > 0)
errx(-1, "Protocol %s recv(sock_receive, NULL, 0) after: %zd",
domainstr, size);
else if (size < 0)
err(-1, "Protocol %s recv(sock_receive, NULL, 0) after",
domainstr);
}
int
main(int argc, __unused char *argv[])
{
struct sockaddr_un sun;
struct sockaddr_in6 sin6;
struct sockaddr_in sin;
struct in6_addr loopback6addr = IN6ADDR_LOOPBACK_INIT;
if (argc != 1)
usage();
bzero(&sin, sizeof(sin));
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sin.sin_port = htons(THEPORT);
test(PF_INET, "PF_INET", (struct sockaddr *)&sin, sizeof(sin));
bzero(&sin6, sizeof(sin6));
sin6.sin6_len = sizeof(sin6);
sin6.sin6_family = AF_INET6;
sin6.sin6_addr = loopback6addr;
sin6.sin6_port = htons(THEPORT);
test(PF_INET6, "PF_INET6", (struct sockaddr *)&sin6, sizeof(sin6));
bzero(&sun, sizeof(sun));
sun.sun_len = sizeof(sun);
sun.sun_family = AF_LOCAL;
strlcpy(sun.sun_path, "/tmp/udpzerosize-socket", sizeof(sun.sun_path));
if (unlink(sun.sun_path) < 0 && errno != ENOENT)
err(-1, "unlink: %s", sun.sun_path);
test(PF_LOCAL, "PF_LOCAL", (struct sockaddr *)&sun, sizeof(sun));
return (0);
}
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