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
20 static struct lws_protocols protocols[] = {
21 LWS_PLUGIN_PROTOCOL_MINIMAL_SERVER_ECHO,
22 { NULL, NULL, 0, 0 } /* terminator */
23 };
24
25 static int interrupted, port = 7681, options;
26
27 /* pass pointers to shared vars to the protocol */
28
29 static const struct lws_protocol_vhost_options pvo_options = {
30 NULL,
31 NULL,
32 "options", /* pvo name */
33 (void *)&options /* pvo value */
34 };
35
36 static const struct lws_protocol_vhost_options pvo_interrupted = {
37 &pvo_options,
38 NULL,
39 "interrupted", /* pvo name */
40 (void *)&interrupted /* pvo value */
41 };
42
43 static 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 };
49 static 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
sigint_handler(int sig)60 void sigint_handler(int sig)
61 {
62 interrupted = 1;
63 }
64
main(int argc,const char ** argv)65 int 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