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 <iphlpapi.h>
27
28 lws_async_dns_server_check_t
lws_plat_asyncdns_init(struct lws_context * context,lws_sockaddr46 * sa46)29 lws_plat_asyncdns_init(struct lws_context *context, lws_sockaddr46 *sa46)
30 {
31 unsigned long ul;
32 FIXED_INFO *fi;
33 int n = 0;
34 DWORD dw;
35
36 ul = sizeof(fi);
37
38 do {
39 fi = (FIXED_INFO *)lws_malloc(ul, __func__);
40 if (!fi)
41 goto oom;
42
43 dw = GetNetworkParams(fi, &ul);
44 if (dw == NO_ERROR)
45 break;
46 if (dw != ERROR_BUFFER_OVERFLOW) {
47 lwsl_err("%s: GetNetworkParams says 0x%x\n", __func__,
48 (unsigned int)dw);
49
50 return LADNS_CONF_SERVER_UNKNOWN;
51 }
52
53 lws_free(fi);
54 if (n++)
55 /* not twice or more */
56 goto oom;
57
58 } while (1);
59
60 /* if we got here, then we have it */
61
62 lwsl_info("%s: trying %s\n", __func__,
63 fi->DnsServerList.IpAddress.String);
64 n = lws_sa46_parse_numeric_address(
65 fi->DnsServerList.IpAddress.String, sa46);
66
67 lws_free(fi);
68
69 return n == 0 ? LADNS_CONF_SERVER_CHANGED :
70 LADNS_CONF_SERVER_UNKNOWN;
71
72 oom:
73 lwsl_err("%s: OOM\n", __func__);
74
75 return LADNS_CONF_SERVER_UNKNOWN;
76 }
77
78 int
lws_plat_ntpclient_config(struct lws_context * context)79 lws_plat_ntpclient_config(struct lws_context *context)
80 {
81 #if defined(LWS_HAVE_GETENV)
82 char *ntpsrv = getenv("LWS_NTP_SERVER");
83
84 if (ntpsrv && strlen(ntpsrv) < 64) {
85 lws_system_blob_heap_append(lws_system_get_blob(context,
86 LWS_SYSBLOB_TYPE_NTP_SERVER, 0),
87 (const uint8_t *)ntpsrv,
88 strlen(ntpsrv));
89 return 1;
90 }
91 #endif
92 return 0;
93 }
94