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
26 static int interrupted;
27 static 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
38 static 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
45 static 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
sigint_handler(int sig)52 void sigint_handler(int sig)
53 {
54 interrupted = 1;
55 }
56
main(int argc,const char ** argv)57 int 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