1/*
2 * lws-minimal-dbus-ws-proxy
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 a minimal session dbus server that uses the lws event loop,
10 * and allows proxying ws client connections via DBUS.
11 */
12
13#include <stdbool.h>
14#include <string.h>
15#include <stdio.h>
16#include <stdlib.h>
17#include <unistd.h>
18#include <signal.h>
19
20#include <libwebsockets.h>
21#include <libwebsockets/lws-dbus.h>
22
23#define LWS_PLUGIN_STATIC
24#include "protocol_lws_minimal_dbus_ws_proxy.c"
25
26static int interrupted;
27static struct lws_protocols protocols[] = {
28	LWS_PLUGIN_PROTOCOL_MINIMAL_DBUS_WSPROXY,
29	LWS_PROTOCOL_LIST_TERM
30};
31
32/*
33 * we pass the dbus address to connect to proxy with from outside the
34 * protocol plugin... eg if built as a plugin for lwsws, you would instead
35 * set this pvo in the lwsws JSON config.
36 */
37
38static const struct lws_protocol_vhost_options pvo_ads = {
39	NULL,
40	NULL,
41	"ads",				/* pvo name */
42	(void *)"unix:abstract=org.libwebsockets.wsclientproxy"	/* pvo value */
43};
44
45static const struct lws_protocol_vhost_options pvo = {
46	NULL,				/* "next" pvo linked-list */
47	&pvo_ads,			/* "child" pvo linked-list */
48	"lws-minimal-dbus-wsproxy",	/* protocol name we belong to on this vhost */
49	""				/* ignored */
50};
51
52void sigint_handler(int sig)
53{
54	interrupted = 1;
55}
56
57int main(int argc, const char **argv)
58{
59	static struct lws_context *context;
60	struct lws_context_creation_info info;
61	const char *p;
62	int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
63			/* for LLL_ verbosity above NOTICE to be built into lws,
64			 * lws must have been configured and built with
65			 * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
66			/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
67			/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
68			/* | LLL_DEBUG */ /* | LLL_THREAD */;
69
70	signal(SIGINT, sigint_handler);
71
72	if ((p = lws_cmdline_option(argc, argv, "-d")))
73		logs = atoi(p);
74
75	lws_set_log_level(logs, NULL);
76	lwsl_user("LWS DBUS ws client proxy\n");
77
78	memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
79	info.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT |
80		LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
81	info.port = CONTEXT_PORT_NO_LISTEN;
82	info.protocols = protocols;
83	info.pvo = &pvo;
84
85	context = lws_create_context(&info);
86	if (!context) {
87		lwsl_err("lws init failed\n");
88		return 1;
89	}
90
91	/* lws event loop (default poll one) */
92
93	while (n >= 0 && !interrupted)
94		n = lws_service(context, 0);
95
96	lws_context_destroy(context);
97
98	lwsl_notice("Exiting cleanly\n");
99
100	return 0;
101}
102