1/*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#include "private-lib-core.h"
26#include <sys/system_properties.h>
27
28lws_async_dns_server_check_t
29lws_plat_asyncdns_init(struct lws_context *context, lws_sockaddr46 *sa46)
30{
31	char d[PROP_VALUE_MAX], *p;
32	uint32_t ip32;
33	uint8_t i[4];
34	int n;
35
36	d[0] = '\0';
37	if (__system_property_get("net.dns1", d) <= 0)
38		return LADNS_CONF_SERVER_UNKNOWN;
39
40	for (n = 0; n < 4; n++) {
41		i[n] = (uint8_t)atoi(d);
42		p = strchr(d, '.');
43		if (n != 3 && !p)
44			return LADNS_CONF_SERVER_UNKNOWN;
45	}
46
47	ip32 = (uint32_t) ((i[0] << 24) | (i[1] << 16) | (i[2] << 8) | i[3]);
48	n = ip32 == sa46->sa4.sin_addr.s_addr;
49	sa46->sa4.sin_family = AF_INET;
50	sa46->sa4.sin_addr.s_addr = ip32;
51
52	return n ? LADNS_CONF_SERVER_SAME : LADNS_CONF_SERVER_CHANGED;
53}
54
55