1/*
2 * lws-minimal-ws-server-echo
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 ws server that echoes back what it was sent, in a way
10 * compatible with autobahn -m fuzzingclient
11 */
12
13#include <libwebsockets.h>
14#include <string.h>
15#include <signal.h>
16
17#define LWS_PLUGIN_STATIC
18#include "protocol_lws_minimal_server_echo.c"
19
20static struct lws_protocols protocols[] = {
21	LWS_PLUGIN_PROTOCOL_MINIMAL_SERVER_ECHO,
22	LWS_PROTOCOL_LIST_TERM
23};
24
25static int interrupted, port = 7681, options;
26
27/* pass pointers to shared vars to the protocol */
28
29static const struct lws_protocol_vhost_options pvo_options = {
30	NULL,
31	NULL,
32	"options",		/* pvo name */
33	(void *)&options	/* pvo value */
34};
35
36static const struct lws_protocol_vhost_options pvo_interrupted = {
37	&pvo_options,
38	NULL,
39	"interrupted",		/* pvo name */
40	(void *)&interrupted	/* pvo value */
41};
42
43static const struct lws_protocol_vhost_options pvo = {
44	NULL,				/* "next" pvo linked-list */
45	&pvo_interrupted,		/* "child" pvo linked-list */
46	"lws-minimal-server-echo",	/* protocol name we belong to on this vhost */
47	""				/* ignored */
48};
49static const struct lws_extension extensions[] = {
50	{
51		"permessage-deflate",
52		lws_extension_callback_pm_deflate,
53		"permessage-deflate"
54		 "; client_no_context_takeover"
55		 "; client_max_window_bits"
56	},
57	{ NULL, NULL, NULL /* terminator */ }
58};
59
60void sigint_handler(int sig)
61{
62	interrupted = 1;
63}
64
65int main(int argc, const char **argv)
66{
67	struct lws_context_creation_info info;
68	struct lws_context *context;
69	const char *p;
70	int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
71			/* for LLL_ verbosity above NOTICE to be built into lws,
72			 * lws must have been configured and built with
73			 * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
74			/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
75			/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
76			/* | LLL_DEBUG */;
77
78	signal(SIGINT, sigint_handler);
79
80	if ((p = lws_cmdline_option(argc, argv, "-d")))
81		logs = atoi(p);
82
83	lws_set_log_level(logs, NULL);
84	lwsl_user("LWS minimal ws client echo + permessage-deflate + multifragment bulk message\n");
85	lwsl_user("   lws-minimal-ws-client-echo [-n (no exts)] [-p port] [-o (once)]\n");
86
87
88	if ((p = lws_cmdline_option(argc, argv, "-p")))
89		port = atoi(p);
90
91	if (lws_cmdline_option(argc, argv, "-o"))
92		options |= 1;
93
94	memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
95	info.port = port;
96	info.protocols = protocols;
97	info.pvo = &pvo;
98	if (!lws_cmdline_option(argc, argv, "-n"))
99		info.extensions = extensions;
100	info.pt_serv_buf_size = 32 * 1024;
101	info.options = LWS_SERVER_OPTION_VALIDATE_UTF8 |
102		LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
103
104	context = lws_create_context(&info);
105	if (!context) {
106		lwsl_err("lws init failed\n");
107		return 1;
108	}
109
110	while (n >= 0 && !interrupted)
111		n = lws_service(context, 0);
112
113	lws_context_destroy(context);
114
115	lwsl_user("Completed %s\n", interrupted == 2 ? "OK" : "failed");
116
117	return interrupted != 2;
118}
119