/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#include <inttypes.h>
#include <sched.h> /* IWYU pragma: keep */
#include <setjmp.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define UNIT_TESTING
#include <cmocka.h>

#include <isc/lib.h>
#include <isc/netaddr.h>
#include <isc/sockaddr.h>
#include <isc/util.h>

#include <tests/isc.h>

/* test isc_netaddr_isnetzero() */
ISC_RUN_TEST_IMPL(netaddr_isnetzero) {
	unsigned int i;
	struct in_addr ina;
	struct {
		const char *address;
		bool expect;
	} tests[] = { { "0.0.0.0", true },    { "0.0.0.1", true },
		      { "0.0.1.2", true },    { "0.1.2.3", true },
		      { "10.0.0.0", false },  { "10.9.0.0", false },
		      { "10.9.8.0", false },  { "10.9.8.7", false },
		      { "127.0.0.0", false }, { "127.0.0.1", false } };
	isc_netaddr_t netaddr;

	UNUSED(state);

	for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
		bool result;
		ina.s_addr = inet_addr(tests[i].address);
		isc_netaddr_fromin(&netaddr, &ina);
		result = isc_netaddr_isnetzero(&netaddr);
		assert_int_equal(result, tests[i].expect);
	}
}

/* test isc_netaddr_masktoprefixlen() calculates correct prefix lengths */
ISC_RUN_TEST_IMPL(netaddr_masktoprefixlen) {
	struct {
		int family;
		const char *addr;
		unsigned int len;
	} tests[] = { { AF_INET, "0.0.0.0", 0 },
		      { AF_INET, "255.255.255.254", 31 },
		      { AF_INET, "255.255.255.255", 32 },
		      { AF_INET, "255.255.255.0", 24 },
		      { AF_INET, "255.128.0.0", 9 },
		      { AF_INET, "255.192.0.0", 10 },
		      { AF_INET6, "ffff::", 16 },
		      { AF_INET6, "ffff:ffff::", 32 },
		      { AF_INET6, "ffff:ffff:ffff::", 48 },
		      { AF_INET6, "ffff:ffff:ffff:ffff::", 64 },
		      { AF_INET6, "ffff:ffff:ffff:ffff:ffff::", 80 } };

	for (size_t i = 0; i < ARRAY_SIZE(tests); i++) {
		isc_netaddr_t ina;
		unsigned int plen;
		isc_result_t result;

		switch (tests[i].family) {
		case AF_INET: {
			struct in_addr na;

			assert_true(inet_pton(AF_INET, tests[i].addr, &na) >=
				    0);
			isc_netaddr_fromin(&ina, &na);
			break;
		}
		case AF_INET6: {
			struct in6_addr na6;

			assert_true(inet_pton(AF_INET6, tests[i].addr, &na6) >=
				    0);
			isc_netaddr_fromin6(&ina, &na6);
			break;
		}
		default:
			assert_true(false);
		}

		result = isc_netaddr_masktoprefixlen(&ina, &plen);
		assert_int_equal(result, ISC_R_SUCCESS);
		assert_int_equal(plen, tests[i].len);
	}
}

/* check multicast addresses are detected properly */
ISC_RUN_TEST_IMPL(netaddr_multicast) {
	unsigned int i;
	struct {
		int family;
		const char *addr;
		bool is_multicast;
	} tests[] = {
		{ AF_INET, "1.2.3.4", false },	{ AF_INET, "4.3.2.1", false },
		{ AF_INET, "224.1.1.1", true }, { AF_INET, "1.1.1.244", false },
		{ AF_INET6, "::1", false },	{ AF_INET6, "ff02::1", true }
	};

	UNUSED(state);

	for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
		isc_netaddr_t na;
		struct in_addr in;
		struct in6_addr in6;
		int r;

		if (tests[i].family == AF_INET) {
			r = inet_pton(AF_INET, tests[i].addr,
				      (unsigned char *)&in);
			assert_int_equal(r, 1);
			isc_netaddr_fromin(&na, &in);
		} else {
			r = inet_pton(AF_INET6, tests[i].addr,
				      (unsigned char *)&in6);
			assert_int_equal(r, 1);
			isc_netaddr_fromin6(&na, &in6);
		}

		assert_int_equal(isc_netaddr_ismulticast(&na),
				 tests[i].is_multicast);
	}
}

ISC_TEST_LIST_START

ISC_TEST_ENTRY(netaddr_isnetzero)
ISC_TEST_ENTRY(netaddr_masktoprefixlen)
ISC_TEST_ENTRY(netaddr_multicast)

ISC_TEST_LIST_END

ISC_TEST_MAIN
