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,
35 #include "lws_config.h"
38 #include "../lib/libwebsockets.h"
40 static unsigned int opts;
41 static int was_closed;
42 static int deny_deflate;
44 static struct libwebsocket *wsi_mirror;
45 static int mirror_lifetime = 0;
46 static volatile int force_exit = 0;
47 static int longlived = 0;
50 * This demo shows how to connect multiple websockets simultaneously to a
51 * websocket server (there is no restriction on their having to be the same
52 * server just it simplifies the demo).
54 * dumb-increment-protocol: we connect to the server and print the number
57 * lws-mirror-protocol: draws random circles, which are mirrored on to every
58 * client (see them being drawn in every browser
59 * session also using the test server)
64 PROTOCOL_DUMB_INCREMENT,
72 /* dumb_increment protocol */
75 callback_dumb_increment(struct libwebsocket_context *this,
76 struct libwebsocket *wsi,
77 enum libwebsocket_callback_reasons reason,
78 void *user, void *in, size_t len)
82 case LWS_CALLBACK_CLIENT_ESTABLISHED:
83 fprintf(stderr, "callback_dumb_increment: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
86 case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
87 fprintf(stderr, "LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
91 case LWS_CALLBACK_CLOSED:
92 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
96 case LWS_CALLBACK_CLIENT_RECEIVE:
97 ((char *)in)[len] = '\0';
98 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
101 /* because we are protocols[0] ... */
103 case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
104 if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
105 fprintf(stderr, "denied deflate-stream extension\n");
108 if ((strcmp(in, "deflate-frame") == 0) && deny_deflate) {
109 fprintf(stderr, "denied deflate-frame extension\n");
112 if ((strcmp(in, "x-google-mux") == 0) && deny_mux) {
113 fprintf(stderr, "denied x-google-mux extension\n");
127 /* lws-mirror_protocol */
131 callback_lws_mirror(struct libwebsocket_context *context,
132 struct libwebsocket *wsi,
133 enum libwebsocket_callback_reasons reason,
134 void *user, void *in, size_t len)
136 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
137 LWS_SEND_BUFFER_POST_PADDING];
140 unsigned int rands[4];
144 case LWS_CALLBACK_CLIENT_ESTABLISHED:
146 fprintf(stderr, "callback_lws_mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
148 libwebsockets_get_random(context, rands, sizeof(rands[0]));
149 mirror_lifetime = 10 + (rands[0] & 1023);
150 /* useful to test single connection stability */
152 mirror_lifetime += 50000;
154 fprintf(stderr, "opened mirror connection with "
155 "%d lifetime\n", mirror_lifetime);
158 * mirror_lifetime is decremented each send, when it reaches
159 * zero the connection is closed in the send callback.
160 * When the close callback comes, wsi_mirror is set to NULL
161 * so a new connection will be opened
165 * start the ball rolling,
166 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
169 libwebsocket_callback_on_writable(context, wsi);
172 case LWS_CALLBACK_CLOSED:
173 fprintf(stderr, "mirror: LWS_CALLBACK_CLOSED mirror_lifetime=%d\n", mirror_lifetime);
177 case LWS_CALLBACK_CLIENT_RECEIVE:
178 /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
181 case LWS_CALLBACK_CLIENT_WRITEABLE:
183 for (n = 0; n < 1; n++) {
184 libwebsockets_get_random(context, rands, sizeof(rands));
185 l += sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING + l],
187 (int)rands[0] & 0xffffff,
193 n = libwebsocket_write(wsi,
194 &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
199 lwsl_err("Partial write LWS_CALLBACK_CLIENT_WRITEABLE\n");
204 if (!mirror_lifetime) {
205 fprintf(stderr, "closing mirror session\n");
208 /* get notified as soon as we can write again */
209 libwebsocket_callback_on_writable(context, wsi);
220 /* list of supported protocols and callbacks */
222 static struct libwebsocket_protocols protocols[] = {
224 "dumb-increment-protocol,fake-nonexistant-protocol",
225 callback_dumb_increment,
230 "fake-nonexistant-protocol,lws-mirror-protocol",
235 { NULL, NULL, 0, 0 } /* end */
238 void sighandler(int sig)
243 static struct option options[] = {
244 { "help", no_argument, NULL, 'h' },
245 { "debug", required_argument, NULL, 'd' },
246 { "port", required_argument, NULL, 'p' },
247 { "ssl", no_argument, NULL, 's' },
248 { "version", required_argument, NULL, 'v' },
249 { "undeflated", no_argument, NULL, 'u' },
250 { "nomux", no_argument, NULL, 'n' },
251 { "longlived", no_argument, NULL, 'l' },
256 int main(int argc, char **argv)
262 struct libwebsocket_context *context;
264 struct libwebsocket *wsi_dumb;
265 int ietf_version = -1; /* latest */
266 struct lws_context_creation_info info;
268 memset(&info, 0, sizeof info);
270 fprintf(stderr, "libwebsockets test client\n"
271 "(C) Copyright 2010-2013 Andy Green <andy@warmcat.com> "
272 "licensed under LGPL2.1\n");
278 n = getopt_long(argc, argv, "nuv:hsp:d:l", options, NULL);
283 lws_set_log_level(atoi(optarg), NULL);
286 use_ssl = 2; /* 2 = allow selfsigned */
295 ietf_version = atoi(optarg);
311 signal(SIGINT, sighandler);
313 address = argv[optind];
316 * create the websockets context. This tracks open connections and
317 * knows how to route any traffic and which protocol version to use,
318 * and if each connection is client or server side.
320 * For this client-only demo, we tell it to not listen on any port.
323 info.port = CONTEXT_PORT_NO_LISTEN;
324 info.protocols = protocols;
325 #ifndef LWS_NO_EXTENSIONS
326 info.extensions = libwebsocket_get_internal_extensions();
331 context = libwebsocket_create_context(&info);
332 if (context == NULL) {
333 fprintf(stderr, "Creating libwebsocket context failed\n");
337 /* create a client websocket using dumb increment protocol */
339 wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
340 "/", argv[optind], argv[optind],
341 protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
343 if (wsi_dumb == NULL) {
344 fprintf(stderr, "libwebsocket connect failed\n");
349 fprintf(stderr, "Waiting for connect...\n");
352 * sit there servicing the websocket context to handle incoming
353 * packets, and drawing random circles on the mirror protocol websocket
354 * nothing happens until the client websocket connection is
355 * asynchronously established
359 while (n >= 0 && !was_closed && !force_exit) {
360 n = libwebsocket_service(context, 10);
368 /* create a client websocket using mirror protocol */
370 wsi_mirror = libwebsocket_client_connect(context,
371 address, port, use_ssl, "/",
372 argv[optind], argv[optind],
373 protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
375 if (wsi_mirror == NULL) {
376 fprintf(stderr, "libwebsocket "
377 "mirror connect failed\n");
384 fprintf(stderr, "Exiting\n");
386 libwebsocket_context_destroy(context);
391 fprintf(stderr, "Usage: libwebsockets-test-client "
392 "<server address> [--port=<p>] "
393 "[--ssl] [-k] [-v <ver>] "
394 "[-d <log bitfield>] [-l]\n");