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#if !defined(_GNU_SOURCE)
26#define _GNU_SOURCE
27#endif
28#include "private-lib-core.h"
29
30/*
31 * Normally you don't want this, use lws_sul instead inside the event loop.
32 * But sometimes for drivers it makes sense, so there's an internal-only
33 * crossplatform api for it.
34 */
35
36void
37lws_msleep(unsigned int ms)
38{
39        usleep((unsigned int)(ms * LWS_US_PER_MS));
40}
41
42lws_usec_t
43lws_now_usecs(void)
44{
45#if defined(LWS_HAVE_CLOCK_GETTIME)
46	struct timespec ts;
47
48	if (clock_gettime(CLOCK_MONOTONIC, &ts))
49		return 0;
50
51	return (((lws_usec_t)ts.tv_sec) * LWS_US_PER_SEC) +
52			((lws_usec_t)ts.tv_nsec / LWS_NS_PER_US);
53#else
54	struct timeval now;
55
56	gettimeofday(&now, NULL);
57	return (((lws_usec_t)now.tv_sec) * LWS_US_PER_SEC) +
58			(lws_usec_t)now.tv_usec;
59#endif
60}
61
62size_t
63lws_get_random(struct lws_context *context, void *buf, size_t len)
64{
65#if defined(__COVERITY__)
66	memset(buf, 0, len);
67	return len;
68#else
69	/* coverity[tainted_scalar] */
70	return (size_t)read(context->fd_random, (char *)buf, len);
71#endif
72}
73
74void lwsl_emit_syslog(int level, const char *line)
75{
76	int syslog_level = LOG_DEBUG;
77
78	switch (level) {
79	case LLL_ERR:
80		syslog_level = LOG_ERR;
81		break;
82	case LLL_WARN:
83		syslog_level = LOG_WARNING;
84		break;
85	case LLL_NOTICE:
86		syslog_level = LOG_NOTICE;
87		break;
88	case LLL_INFO:
89		syslog_level = LOG_INFO;
90		break;
91	}
92	syslog(syslog_level, "%s", line);
93}
94
95
96int
97lws_plat_write_cert(struct lws_vhost *vhost, int is_key, int fd, void *buf,
98			size_t len)
99{
100	ssize_t n;
101
102	n = write(fd, buf, len);
103
104	if (n < 0 || fsync(fd))
105		return 1;
106	if (lseek(fd, 0, SEEK_SET) < 0)
107		return 1;
108
109	return (size_t)n != len;
110}
111
112
113int
114lws_plat_recommended_rsa_bits(void)
115{
116	return 4096;
117}
118
119/*
120 * Platform-specific ntpclient server configuration
121 */
122
123int
124lws_plat_ntpclient_config(struct lws_context *context)
125{
126#if defined(LWS_HAVE_GETENV)
127	char *ntpsrv = getenv("LWS_NTP_SERVER");
128
129	if (ntpsrv && strlen(ntpsrv) < 64) {
130		lws_system_blob_t *blob = lws_system_get_blob(context,
131                                            LWS_SYSBLOB_TYPE_NTP_SERVER, 0);
132		if (!blob)
133			return 0;
134
135		lws_system_blob_direct_set(blob, (const uint8_t *)ntpsrv,
136					    strlen(ntpsrv));
137		return 1;
138	}
139#endif
140	return 0;
141}
142
143