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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 lws_usec_t
lws_now_usecs(void)31 lws_now_usecs(void)
32 {
33 #if defined(LWS_HAVE_CLOCK_GETTIME)
34 	struct timespec ts;
35 
36 	if (clock_gettime(CLOCK_MONOTONIC, &ts))
37 		return 0;
38 
39 	return (((lws_usec_t)ts.tv_sec) * LWS_US_PER_SEC) +
40 			((lws_usec_t)ts.tv_nsec / LWS_NS_PER_US);
41 #else
42 	struct timeval now;
43 
44 	gettimeofday(&now, NULL);
45 	return (((lws_usec_t)now.tv_sec) * LWS_US_PER_SEC) +
46 			(lws_usec_t)now.tv_usec;
47 #endif
48 }
49 
50 size_t
lws_get_random(struct lws_context * context,void * buf,size_t len)51 lws_get_random(struct lws_context *context, void *buf, size_t len)
52 {
53 #if defined(__COVERITY__)
54 	memset(buf, 0, len);
55 	return len;
56 #else
57 	/* coverity[tainted_scalar] */
58 	return (size_t)read(context->fd_random, (char *)buf, len);
59 #endif
60 }
61 
lwsl_emit_syslog(int level,const char * line)62 void lwsl_emit_syslog(int level, const char *line)
63 {
64 	int syslog_level = LOG_DEBUG;
65 
66 	switch (level) {
67 	case LLL_ERR:
68 		syslog_level = LOG_ERR;
69 		break;
70 	case LLL_WARN:
71 		syslog_level = LOG_WARNING;
72 		break;
73 	case LLL_NOTICE:
74 		syslog_level = LOG_NOTICE;
75 		break;
76 	case LLL_INFO:
77 		syslog_level = LOG_INFO;
78 		break;
79 	}
80 	syslog(syslog_level, "%s", line);
81 }
82 
83 
84 int
lws_plat_write_cert(struct lws_vhost * vhost,int is_key,int fd,void * buf,int len)85 lws_plat_write_cert(struct lws_vhost *vhost, int is_key, int fd, void *buf,
86 			int len)
87 {
88 	int n;
89 
90 	n = write(fd, buf, len);
91 
92 	fsync(fd);
93 	if (lseek(fd, 0, SEEK_SET) < 0)
94 		return 1;
95 
96 	return n != len;
97 }
98 
99 
100 int
lws_plat_recommended_rsa_bits(void)101 lws_plat_recommended_rsa_bits(void)
102 {
103 	return 4096;
104 }
105