1/*
2 * lws-minimal-ws-server-timer
3 *
4 * Written in 2010-2019 by Andy Green <andy@warmcat.com>
5 *
6 * This file is made available under the Creative Commons CC0 1.0
7 * Universal Public Domain Dedication.
8 *
9 * This demonstrates the most minimal http server you can make with lws,
10 * with an added websocket chat server.
11 *
12 * To keep it simple, it serves stuff in the subdirectory "./mount-origin" of
13 * the directory it was started in.
14 * You can change that by changing mount.origin.
15 */
16
17#include <libwebsockets.h>
18#include <string.h>
19#include <signal.h>
20
21static int
22callback_protocol(struct lws *wsi, enum lws_callback_reasons reason,
23			  void *user, void *in, size_t len)
24{
25	switch (reason) {
26
27	case LWS_CALLBACK_ESTABLISHED:
28		lwsl_user("LWS_CALLBACK_ESTABLISHED\n");
29		lws_set_timer_usecs(wsi, 20 * LWS_USEC_PER_SEC);
30		lws_set_timeout(wsi, 1, 60);
31		break;
32
33	case LWS_CALLBACK_TIMER:
34		lwsl_user("LWS_CALLBACK_TIMER\n");
35		lws_set_timer_usecs(wsi, 20 * LWS_USEC_PER_SEC);
36		lws_set_timeout(wsi, 1, 60);
37		break;
38
39	case LWS_CALLBACK_CLOSED:
40		lwsl_user("LWS_CALLBACK_CLOSED\n");
41		break;
42
43	default:
44		break;
45	}
46
47	return 0;
48}
49
50static struct lws_protocols protocols[] = {
51	{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0 },
52	{ "timer", callback_protocol, 0, 0, 0, NULL, 0 },
53	LWS_PROTOCOL_LIST_TERM
54};
55
56static const lws_retry_bo_t retry = {
57	.secs_since_valid_ping = 3,
58	.secs_since_valid_hangup = 10,
59};
60
61static int interrupted;
62
63static const struct lws_http_mount mount = {
64	/* .mount_next */		NULL,		/* linked-list "next" */
65	/* .mountpoint */		"/",		/* mountpoint URL */
66	/* .origin */			"./mount-origin",  /* serve from dir */
67	/* .def */			"index.html",	/* default filename */
68	/* .protocol */			NULL,
69	/* .cgienv */			NULL,
70	/* .extra_mimetypes */		NULL,
71	/* .interpret */		NULL,
72	/* .cgi_timeout */		0,
73	/* .cache_max_age */		0,
74	/* .auth_mask */		0,
75	/* .cache_reusable */		0,
76	/* .cache_revalidate */		0,
77	/* .cache_intermediaries */	0,
78	/* .origin_protocol */		LWSMPRO_FILE,	/* files in a dir */
79	/* .mountpoint_len */		1,		/* char count */
80	/* .basic_auth_login_file */	NULL,
81};
82
83void sigint_handler(int sig)
84{
85	interrupted = 1;
86}
87
88int main(int argc, const char **argv)
89{
90	struct lws_context_creation_info info;
91	struct lws_context *context;
92	const char *p;
93	int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
94			/* for LLL_ verbosity above NOTICE to be built into lws,
95			 * lws must have been configured and built with
96			 * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
97			/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
98			/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
99			/* | LLL_DEBUG */;
100
101	signal(SIGINT, sigint_handler);
102
103	if ((p = lws_cmdline_option(argc, argv, "-d")))
104		logs = atoi(p);
105
106	lws_set_log_level(logs, NULL);
107	lwsl_user("LWS minimal ws server | visit http://localhost:7681 (-s = use TLS / https)\n");
108
109	memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
110	info.port = 7681;
111	info.mounts = &mount;
112	info.protocols = protocols;
113	info.vhost_name = "localhost";
114	info.options =
115		LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
116
117#if defined(LWS_WITH_TLS)
118	if (lws_cmdline_option(argc, argv, "-s")) {
119		lwsl_user("Server using TLS\n");
120		info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
121		info.ssl_cert_filepath = "localhost-100y.cert";
122		info.ssl_private_key_filepath = "localhost-100y.key";
123	}
124#endif
125
126	if (lws_cmdline_option(argc, argv, "-h"))
127		info.options |= LWS_SERVER_OPTION_VHOST_UPG_STRICT_HOST_CHECK;
128
129	if (lws_cmdline_option(argc, argv, "-v"))
130		info.retry_and_idle_policy = &retry;
131
132	context = lws_create_context(&info);
133	if (!context) {
134		lwsl_err("lws init failed\n");
135		return 1;
136	}
137
138	while (n >= 0 && !interrupted)
139		n = lws_service(context, 0);
140
141	lws_context_destroy(context);
142
143	return 0;
144}
145