2 * libwebsockets-test-client - libwebsockets test implementation
4 * Copyright (C) 2011 Andy Green <andy@warmcat.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation:
9 * version 2.1 of the License.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
30 #include "lws_config.h"
33 #include "../lib/libwebsockets.h"
35 static unsigned int opts;
36 static int was_closed;
37 static int deny_deflate;
39 static struct libwebsocket *wsi_mirror;
40 static int mirror_lifetime = 0;
41 static volatile int force_exit = 0;
42 static int longlived = 0;
45 * This demo shows how to connect multiple websockets simultaneously to a
46 * websocket server (there is no restriction on their having to be the same
47 * server just it simplifies the demo).
49 * dumb-increment-protocol: we connect to the server and print the number
52 * lws-mirror-protocol: draws random circles, which are mirrored on to every
53 * client (see them being drawn in every browser
54 * session also using the test server)
59 PROTOCOL_DUMB_INCREMENT,
67 /* dumb_increment protocol */
70 callback_dumb_increment(struct libwebsocket_context *this,
71 struct libwebsocket *wsi,
72 enum libwebsocket_callback_reasons reason,
73 void *user, void *in, size_t len)
77 case LWS_CALLBACK_CLIENT_ESTABLISHED:
78 fprintf(stderr, "callback_dumb_increment: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
81 case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
82 fprintf(stderr, "LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
86 case LWS_CALLBACK_CLOSED:
87 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
91 case LWS_CALLBACK_CLIENT_RECEIVE:
92 ((char *)in)[len] = '\0';
93 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
96 /* because we are protocols[0] ... */
98 case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
99 if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
100 fprintf(stderr, "denied deflate-stream extension\n");
103 if ((strcmp(in, "deflate-frame") == 0) && deny_deflate) {
104 fprintf(stderr, "denied deflate-frame extension\n");
107 if ((strcmp(in, "x-google-mux") == 0) && deny_mux) {
108 fprintf(stderr, "denied x-google-mux extension\n");
122 /* lws-mirror_protocol */
126 callback_lws_mirror(struct libwebsocket_context *context,
127 struct libwebsocket *wsi,
128 enum libwebsocket_callback_reasons reason,
129 void *user, void *in, size_t len)
131 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
132 LWS_SEND_BUFFER_POST_PADDING];
138 case LWS_CALLBACK_CLIENT_ESTABLISHED:
140 fprintf(stderr, "callback_lws_mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
142 mirror_lifetime = 10 + (random() & 1023);
143 /* useful to test single connection stability */
145 mirror_lifetime += 50000;
147 fprintf(stderr, "opened mirror connection with "
148 "%d lifetime\n", mirror_lifetime);
151 * mirror_lifetime is decremented each send, when it reaches
152 * zero the connection is closed in the send callback.
153 * When the close callback comes, wsi_mirror is set to NULL
154 * so a new connection will be opened
158 * start the ball rolling,
159 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
162 libwebsocket_callback_on_writable(context, wsi);
165 case LWS_CALLBACK_CLOSED:
166 fprintf(stderr, "mirror: LWS_CALLBACK_CLOSED mirror_lifetime=%d\n", mirror_lifetime);
170 case LWS_CALLBACK_CLIENT_RECEIVE:
171 /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
174 case LWS_CALLBACK_CLIENT_WRITEABLE:
176 for (n = 0; n < 1; n++)
177 l += sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING + l],
179 (int)random() & 0xffffff,
184 n = libwebsocket_write(wsi,
185 &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
190 lwsl_err("Partial write LWS_CALLBACK_CLIENT_WRITEABLE\n");
195 if (!mirror_lifetime) {
196 fprintf(stderr, "closing mirror session\n");
199 /* get notified as soon as we can write again */
200 libwebsocket_callback_on_writable(context, wsi);
211 /* list of supported protocols and callbacks */
213 static struct libwebsocket_protocols protocols[] = {
215 "dumb-increment-protocol",
216 callback_dumb_increment,
221 "lws-mirror-protocol",
226 { NULL, NULL, 0, 0 } /* end */
229 void sighandler(int sig)
234 static struct option options[] = {
235 { "help", no_argument, NULL, 'h' },
236 { "debug", required_argument, NULL, 'd' },
237 { "port", required_argument, NULL, 'p' },
238 { "ssl", no_argument, NULL, 's' },
239 { "version", required_argument, NULL, 'v' },
240 { "undeflated", no_argument, NULL, 'u' },
241 { "nomux", no_argument, NULL, 'n' },
242 { "longlived", no_argument, NULL, 'l' },
247 int main(int argc, char **argv)
253 struct libwebsocket_context *context;
255 struct libwebsocket *wsi_dumb;
256 int ietf_version = -1; /* latest */
257 struct lws_context_creation_info info;
259 memset(&info, 0, sizeof info);
261 fprintf(stderr, "libwebsockets test client\n"
262 "(C) Copyright 2010-2013 Andy Green <andy@warmcat.com> "
263 "licensed under LGPL2.1\n");
269 n = getopt_long(argc, argv, "nuv:hsp:d:l", options, NULL);
274 lws_set_log_level(atoi(optarg), NULL);
277 use_ssl = 2; /* 2 = allow selfsigned */
286 ietf_version = atoi(optarg);
302 signal(SIGINT, sighandler);
304 address = argv[optind];
307 * create the websockets context. This tracks open connections and
308 * knows how to route any traffic and which protocol version to use,
309 * and if each connection is client or server side.
311 * For this client-only demo, we tell it to not listen on any port.
314 info.port = CONTEXT_PORT_NO_LISTEN;
315 info.protocols = protocols;
316 #ifndef LWS_NO_EXTENSIONS
317 info.extensions = libwebsocket_get_internal_extensions();
322 context = libwebsocket_create_context(&info);
323 if (context == NULL) {
324 fprintf(stderr, "Creating libwebsocket context failed\n");
328 /* create a client websocket using dumb increment protocol */
330 wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
331 "/", argv[optind], argv[optind],
332 protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
334 if (wsi_dumb == NULL) {
335 fprintf(stderr, "libwebsocket connect failed\n");
340 fprintf(stderr, "Waiting for connect...\n");
343 * sit there servicing the websocket context to handle incoming
344 * packets, and drawing random circles on the mirror protocol websocket
345 * nothing happens until the client websocket connection is
346 * asynchronously established
350 while (n >= 0 && !was_closed && !force_exit) {
351 n = libwebsocket_service(context, 10);
359 /* create a client websocket using mirror protocol */
361 wsi_mirror = libwebsocket_client_connect(context,
362 address, port, use_ssl, "/",
363 argv[optind], argv[optind],
364 protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
366 if (wsi_mirror == NULL) {
367 fprintf(stderr, "libwebsocket "
368 "mirror connect failed\n");
375 fprintf(stderr, "Exiting\n");
377 libwebsocket_context_destroy(context);
382 fprintf(stderr, "Usage: libwebsockets-test-client "
383 "<server address> [--port=<p>] "
384 "[--ssl] [-k] [-v <ver>] "
385 "[-d <log bitfield>] [-l]\n");