mirror of
https://github.com/warmcat/libwebsockets.git
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c95706a17f
Trying to use a remote pool is very variable with CI, the builder can force a local ntpd this way cleanly. When enabled all the test apps use ntpclient, so this lets us tell them all to go to the local ntpd in one hit.
111 lines
3 KiB
C
111 lines
3 KiB
C
/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "private-lib-core.h"
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lws_async_dns_server_check_t
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lws_plat_asyncdns_init(struct lws_context *context, lws_sockaddr46 *sa46)
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{
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lws_async_dns_server_check_t s = LADNS_CONF_SERVER_CHANGED;
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lws_sockaddr46 sa46t;
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lws_tokenize_t ts;
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int fd, n, ns = 0;
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char ads[48], *r;
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r = (char *)context->pt[0].serv_buf;
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/* grab the first chunk of /etc/resolv.conf */
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fd = open("/etc/resolv.conf", LWS_O_RDONLY);
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if (fd < 0)
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return LADNS_CONF_SERVER_UNKNOWN;
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n = read(fd, r, context->pt_serv_buf_size - 1);
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close(fd);
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if (n < 0)
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return LADNS_CONF_SERVER_UNKNOWN;
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r[n] = '\0';
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lws_tokenize_init(&ts, r, LWS_TOKENIZE_F_DOT_NONTERM |
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LWS_TOKENIZE_F_NO_FLOATS |
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LWS_TOKENIZE_F_NO_INTEGERS |
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LWS_TOKENIZE_F_MINUS_NONTERM |
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LWS_TOKENIZE_F_HASH_COMMENT);
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do {
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ts.e = lws_tokenize(&ts);
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if (ts.e != LWS_TOKZE_TOKEN) {
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ns = 0;
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continue;
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}
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if (!ns && !strncmp("nameserver", ts.token, ts.token_len)) {
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ns = 1;
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continue;
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}
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if (!ns)
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continue;
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/* we are a token just after the "nameserver" token */
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ns = 0;
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if (ts.token_len > (int)sizeof(ads) - 1)
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continue;
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memcpy(ads, ts.token, ts.token_len);
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ads[ts.token_len] = '\0';
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if (lws_sa46_parse_numeric_address(ads, &sa46t) < 0)
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continue;
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if (!lws_sa46_compare_ads(sa46, &sa46t))
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s = LADNS_CONF_SERVER_SAME;
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*sa46 = sa46t;
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return s;
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} while (ts.e > 0);
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return LADNS_CONF_SERVER_UNKNOWN;
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}
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/*
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* Platform-specific ntpclient server configuration
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*/
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int
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lws_plat_ntpclient_config(struct lws_context *context)
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{
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#if defined(LWS_HAVE_GETENV)
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char *ntpsrv = getenv("LWS_NTP_SERVER");
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if (ntpsrv && strlen(ntpsrv) < 64) {
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lws_system_blob_direct_set(lws_system_get_blob(context,
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LWS_SYSBLOB_TYPE_NTP_SERVER, 0),
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(const uint8_t *)ntpsrv,
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strlen(ntpsrv));
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return 1;
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}
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#endif
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return 0;
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}
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