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,
34 #include "../lib/libwebsockets.h"
36 static unsigned int opts;
37 static int was_closed;
38 static int deny_deflate;
40 static struct libwebsocket *wsi_mirror;
41 static int mirror_lifetime = 0;
42 static volatile int force_exit = 0;
43 static int longlived = 0;
46 * This demo shows how to connect multiple websockets simultaneously to a
47 * websocket server (there is no restriction on their having to be the same
48 * server just it simplifies the demo).
50 * dumb-increment-protocol: we connect to the server and print the number
53 * lws-mirror-protocol: draws random circles, which are mirrored on to every
54 * client (see them being drawn in every browser
55 * session also using the test server)
60 PROTOCOL_DUMB_INCREMENT,
68 /* dumb_increment protocol */
71 callback_dumb_increment(struct libwebsocket_context *this,
72 struct libwebsocket *wsi,
73 enum libwebsocket_callback_reasons reason,
74 void *user, void *in, size_t len)
78 case LWS_CALLBACK_CLIENT_ESTABLISHED:
79 fprintf(stderr, "callback_dumb_increment: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
82 case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
83 fprintf(stderr, "LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
87 case LWS_CALLBACK_CLOSED:
88 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
92 case LWS_CALLBACK_CLIENT_RECEIVE:
93 ((char *)in)[len] = '\0';
94 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
97 /* because we are protocols[0] ... */
99 case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
100 if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
101 fprintf(stderr, "denied deflate-stream extension\n");
104 if ((strcmp(in, "deflate-frame") == 0) && deny_deflate) {
105 fprintf(stderr, "denied deflate-frame extension\n");
108 if ((strcmp(in, "x-google-mux") == 0) && deny_mux) {
109 fprintf(stderr, "denied x-google-mux extension\n");
123 /* lws-mirror_protocol */
127 callback_lws_mirror(struct libwebsocket_context *context,
128 struct libwebsocket *wsi,
129 enum libwebsocket_callback_reasons reason,
130 void *user, void *in, size_t len)
132 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
133 LWS_SEND_BUFFER_POST_PADDING];
136 unsigned int rands[4];
140 case LWS_CALLBACK_CLIENT_ESTABLISHED:
142 fprintf(stderr, "callback_lws_mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
144 libwebsockets_get_random(context, rands, sizeof(rands[0]));
145 mirror_lifetime = 10 + (rands[0] & 1023);
146 /* useful to test single connection stability */
148 mirror_lifetime += 50000;
150 fprintf(stderr, "opened mirror connection with "
151 "%d lifetime\n", mirror_lifetime);
154 * mirror_lifetime is decremented each send, when it reaches
155 * zero the connection is closed in the send callback.
156 * When the close callback comes, wsi_mirror is set to NULL
157 * so a new connection will be opened
161 * start the ball rolling,
162 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
165 libwebsocket_callback_on_writable(context, wsi);
168 case LWS_CALLBACK_CLOSED:
169 fprintf(stderr, "mirror: LWS_CALLBACK_CLOSED mirror_lifetime=%d\n", mirror_lifetime);
173 case LWS_CALLBACK_CLIENT_RECEIVE:
174 /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
177 case LWS_CALLBACK_CLIENT_WRITEABLE:
179 for (n = 0; n < 1; n++) {
180 libwebsockets_get_random(context, rands, sizeof(rands));
181 l += sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING + l],
183 (int)rands[0] & 0xffffff,
189 n = libwebsocket_write(wsi,
190 &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
195 lwsl_err("Partial write LWS_CALLBACK_CLIENT_WRITEABLE\n");
200 if (!mirror_lifetime) {
201 fprintf(stderr, "closing mirror session\n");
204 /* get notified as soon as we can write again */
205 libwebsocket_callback_on_writable(context, wsi);
216 /* list of supported protocols and callbacks */
218 static struct libwebsocket_protocols protocols[] = {
220 "dumb-increment-protocol,fake-nonexistant-protocol",
221 callback_dumb_increment,
226 "fake-nonexistant-protocol,lws-mirror-protocol",
231 { NULL, NULL, 0, 0 } /* end */
234 void sighandler(int sig)
239 static struct option options[] = {
240 { "help", no_argument, NULL, 'h' },
241 { "debug", required_argument, NULL, 'd' },
242 { "port", required_argument, NULL, 'p' },
243 { "ssl", no_argument, NULL, 's' },
244 { "version", required_argument, NULL, 'v' },
245 { "undeflated", no_argument, NULL, 'u' },
246 { "nomux", no_argument, NULL, 'n' },
247 { "longlived", no_argument, NULL, 'l' },
252 int main(int argc, char **argv)
258 struct libwebsocket_context *context;
260 struct libwebsocket *wsi_dumb;
261 int ietf_version = -1; /* latest */
262 struct lws_context_creation_info info;
264 memset(&info, 0, sizeof info);
266 fprintf(stderr, "libwebsockets test client\n"
267 "(C) Copyright 2010-2015 Andy Green <andy@warmcat.com> "
268 "licensed under LGPL2.1\n");
274 n = getopt_long(argc, argv, "nuv:hsp:d:l", options, NULL);
279 lws_set_log_level(atoi(optarg), NULL);
282 use_ssl = 2; /* 2 = allow selfsigned */
291 ietf_version = atoi(optarg);
307 signal(SIGINT, sighandler);
309 address = argv[optind];
312 * create the websockets context. This tracks open connections and
313 * knows how to route any traffic and which protocol version to use,
314 * and if each connection is client or server side.
316 * For this client-only demo, we tell it to not listen on any port.
319 info.port = CONTEXT_PORT_NO_LISTEN;
320 info.protocols = protocols;
321 #ifndef LWS_NO_EXTENSIONS
322 info.extensions = libwebsocket_get_internal_extensions();
327 context = libwebsocket_create_context(&info);
328 if (context == NULL) {
329 fprintf(stderr, "Creating libwebsocket context failed\n");
333 /* create a client websocket using dumb increment protocol */
335 wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
336 "/", argv[optind], argv[optind],
337 protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
339 if (wsi_dumb == NULL) {
340 fprintf(stderr, "libwebsocket connect failed\n");
345 fprintf(stderr, "Waiting for connect...\n");
348 * sit there servicing the websocket context to handle incoming
349 * packets, and drawing random circles on the mirror protocol websocket
350 * nothing happens until the client websocket connection is
351 * asynchronously established
355 while (n >= 0 && !was_closed && !force_exit) {
356 n = libwebsocket_service(context, 10);
364 /* create a client websocket using mirror protocol */
366 wsi_mirror = libwebsocket_client_connect(context,
367 address, port, use_ssl, "/",
368 argv[optind], argv[optind],
369 protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
371 if (wsi_mirror == NULL) {
372 fprintf(stderr, "libwebsocket "
373 "mirror connect failed\n");
380 fprintf(stderr, "Exiting\n");
382 libwebsocket_context_destroy(context);
387 fprintf(stderr, "Usage: libwebsockets-test-client "
388 "<server address> [--port=<p>] "
389 "[--ssl] [-k] [-v <ver>] "
390 "[-d <log bitfield>] [-l]\n");