strace/tests/ip_mreq.c

/*
 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * 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 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 "tests.h"
#include <netinet/in.h>

#if defined IP_ADD_MEMBERSHIP && defined IPV6_ADD_MEMBERSHIP \
 && defined IPV6_JOIN_ANYCAST && defined HAVE_IF_INDEXTONAME

# include <stdio.h>
# include <unistd.h>
# include <sys/socket.h>
# include <arpa/inet.h>
# include <net/if.h>

int
main(void)
{
	static const char multi4addr[] = "224.0.0.3";
	static const char multi6addr[] = "ff01::c";
	static const char interface[] = "127.0.0.1";

	struct ip_mreq *const m4 = tail_alloc(sizeof(*m4));
	struct ipv6_mreq *const m6 = tail_alloc(sizeof(*m6));
	unsigned int i;
	int rc;

	inet_pton(AF_INET, multi4addr, &m4->imr_multiaddr);
	inet_pton(AF_INET, interface, &m4->imr_interface);
	inet_pton(AF_INET6, multi6addr, &m6->ipv6mr_multiaddr);

	m6->ipv6mr_interface = if_nametoindex("lo");
	if (!m6->ipv6mr_interface)
		perror_msg_and_skip("lo");

	(void) close(0);
	if (socket(AF_INET, SOCK_DGRAM, 0))
		perror_msg_and_skip("socket");

	struct {
		int level;
		const char *str_level;
		int optname;
		const char *str_optname;
		void *optval;
		unsigned int optsize;
	} short_any[] = {
		{
			ARG_STR(SOL_IP), ARG_STR(IP_ADD_MEMBERSHIP),
			m4, sizeof(*m4)
		},
		{
			ARG_STR(SOL_IP), ARG_STR(IP_DROP_MEMBERSHIP),
			m4, sizeof(*m4)
		},
		{
			ARG_STR(SOL_IPV6), ARG_STR(IPV6_ADD_MEMBERSHIP),
			m6, sizeof(*m6)
		},
		{
			ARG_STR(SOL_IPV6), ARG_STR(IPV6_DROP_MEMBERSHIP),
			m6, sizeof(*m6)
		},
		{
			ARG_STR(SOL_IPV6), ARG_STR(IPV6_JOIN_ANYCAST),
			m6, sizeof(*m6)
		},
		{
			ARG_STR(SOL_IPV6), ARG_STR(IPV6_LEAVE_ANYCAST),
			m6, sizeof(*m6)
		}
	};

	for (i = 0; i < ARRAY_SIZE(short_any); ++i) {
		rc = setsockopt(0, short_any[i].level, short_any[i].optname,
				short_any[i].optval, 1);
		printf("setsockopt(0, %s, %s, \"\\%hho\", 1) = %s\n",
		       short_any[i].str_level, short_any[i].str_optname,
		       * (unsigned char *) short_any[i].optval,
		       sprintrc(rc));

		rc = setsockopt(0, short_any[i].level, short_any[i].optname,
				short_any[i].optval + 1, short_any[i].optsize);
		printf("setsockopt(0, %s, %s, %p, %u) = %s\n",
		       short_any[i].str_level, short_any[i].str_optname,
		       short_any[i].optval + 1, short_any[i].optsize,
		       sprintrc(rc));
	}

	struct {
		int optname;
		const char *str_optname;
	} long_ip[] = {
		{ ARG_STR(IP_ADD_MEMBERSHIP) },
		{ ARG_STR(IP_DROP_MEMBERSHIP) }
	}, long_ipv6[] = {
		{ ARG_STR(IPV6_ADD_MEMBERSHIP) },
		{ ARG_STR(IPV6_DROP_MEMBERSHIP) },
		{ ARG_STR(IPV6_JOIN_ANYCAST) },
		{ ARG_STR(IPV6_LEAVE_ANYCAST) }
	};

	for (i = 0; i < ARRAY_SIZE(long_ip); ++i) {
		rc = setsockopt(0, SOL_IP, long_ip[i].optname,
				m4, sizeof(*m4));
		printf("setsockopt(0, SOL_IP, %s"
		       ", {imr_multiaddr=inet_addr(\"%s\")"
		       ", imr_interface=inet_addr(\"%s\")}, %u) = %s\n",
		       long_ip[i].str_optname, multi4addr,
		       interface, (unsigned) sizeof(*m4), sprintrc(rc));
	}

	for (i = 0; i < ARRAY_SIZE(long_ipv6); ++i) {
		rc = setsockopt(0, SOL_IPV6, long_ipv6[i].optname,
				m6, sizeof(*m6));
		printf("setsockopt(0, SOL_IPV6, %s"
		       ", {ipv6mr_multiaddr=inet_pton(\"%s\")"
		       ", ipv6mr_interface=if_nametoindex(\"lo\")}"
		       ", %u) = %s\n",
		       long_ipv6[i].str_optname, multi6addr,
		       (unsigned) sizeof(*m6), sprintrc(rc));
	}

	puts("+++ exited with 0 +++");
	return 0;
}

#else

SKIP_MAIN_UNDEFINED("IP_ADD_MEMBERSHIP && IPV6_ADD_MEMBERSHIP"
		    " && IPV6_JOIN_ANYCAST && HAVE_IF_INDEXTONAME")

#endif