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 "gettimeofday.h"
37 #include "../lib/libwebsockets.h"
39 static int deny_deflate, deny_mux, longlived, mirror_lifetime;
40 static struct lws *wsi_dumb, *wsi_mirror;
41 static volatile int force_exit;
42 static unsigned int opts;
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,
68 * dumb_increment protocol
70 * since this also happens to be protocols[0], some callbacks that are not
71 * bound to a specific protocol also turn up here.
75 callback_dumb_increment(struct lws_context *context,
77 enum lws_callback_reasons reason,
78 void *user, void *in, size_t len)
82 case LWS_CALLBACK_CLIENT_ESTABLISHED:
83 lwsl_info("dumb: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
86 case LWS_CALLBACK_CLOSED:
87 lwsl_notice("dumb: LWS_CALLBACK_CLOSED\n");
91 case LWS_CALLBACK_CLIENT_RECEIVE:
92 ((char *)in)[len] = '\0';
93 lwsl_info("rx %d '%s'\n", (int)len, (char *)in);
96 /* because we are protocols[0] ... */
98 case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
99 if (wsi == wsi_dumb) {
100 lwsl_err("dumb: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
103 if (wsi == wsi_mirror) {
104 lwsl_err("mirror: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
109 case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
110 if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
111 lwsl_notice("denied deflate-stream extension\n");
114 if ((strcmp(in, "deflate-frame") == 0) && deny_deflate) {
115 lwsl_notice("denied deflate-frame extension\n");
118 if ((strcmp(in, "x-google-mux") == 0) && deny_mux) {
119 lwsl_notice("denied x-google-mux extension\n");
132 /* lws-mirror_protocol */
136 callback_lws_mirror(struct lws_context *context,
138 enum lws_callback_reasons reason,
139 void *user, void *in, size_t len)
141 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
142 LWS_SEND_BUFFER_POST_PADDING];
143 unsigned int rands[4];
148 case LWS_CALLBACK_CLIENT_ESTABLISHED:
150 lwsl_notice("mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
152 lws_get_random(context, rands, sizeof(rands[0]));
153 mirror_lifetime = 16384 + (rands[0] & 65535);
154 /* useful to test single connection stability */
156 mirror_lifetime += 500000;
158 lwsl_info("opened mirror connection with "
159 "%d lifetime\n", mirror_lifetime);
162 * mirror_lifetime is decremented each send, when it reaches
163 * zero the connection is closed in the send callback.
164 * When the close callback comes, wsi_mirror is set to NULL
165 * so a new connection will be opened
167 * start the ball rolling,
168 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
170 lws_callback_on_writable(wsi);
173 case LWS_CALLBACK_CLOSED:
174 lwsl_notice("mirror: LWS_CALLBACK_CLOSED mirror_lifetime=%d\n", mirror_lifetime);
178 case LWS_CALLBACK_CLIENT_WRITEABLE:
179 for (n = 0; n < 1; n++) {
180 lws_get_random(context, rands, sizeof(rands));
181 l += sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING + l],
183 (int)rands[0] & 0xffffff,
189 n = lws_write(wsi, &buf[LWS_SEND_BUFFER_PRE_PADDING], l,
190 opts | LWS_WRITE_TEXT);
194 lwsl_err("Partial write LWS_CALLBACK_CLIENT_WRITEABLE\n");
199 if (!mirror_lifetime) {
200 lwsl_info("closing mirror session\n");
203 /* get notified as soon as we can write again */
204 lws_callback_on_writable(wsi);
215 /* list of supported protocols and callbacks */
217 static struct lws_protocols protocols[] = {
219 "dumb-increment-protocol,fake-nonexistant-protocol",
220 callback_dumb_increment,
225 "fake-nonexistant-protocol,lws-mirror-protocol",
230 { NULL, NULL, 0, 0 } /* end */
233 void sighandler(int sig)
238 static struct option options[] = {
239 { "help", no_argument, NULL, 'h' },
240 { "debug", required_argument, NULL, 'd' },
241 { "port", required_argument, NULL, 'p' },
242 { "ssl", no_argument, NULL, 's' },
243 { "version", required_argument, NULL, 'v' },
244 { "undeflated", no_argument, NULL, 'u' },
245 { "nomux", no_argument, NULL, 'n' },
246 { "longlived", no_argument, NULL, 'l' },
250 static int ratelimit_connects(unsigned int *last, int secs)
254 gettimeofday(&tv, NULL);
255 if (tv.tv_sec - (*last) < secs)
263 int main(int argc, char **argv)
265 int n = 0, ret = 0, port = 7681, use_ssl = 0;
266 unsigned int rl_dumb = 0, rl_mirror = 0;
267 struct lws_context_creation_info info;
268 struct lws_context *context;
269 int ietf_version = -1; /* latest */
272 memset(&info, 0, sizeof info);
274 fprintf(stderr, "libwebsockets test client\n"
275 "(C) Copyright 2010-2015 Andy Green <andy@warmcat.com> "
276 "licensed under LGPL2.1\n");
282 n = getopt_long(argc, argv, "nuv:hsp:d:l", options, NULL);
287 lws_set_log_level(atoi(optarg), NULL);
290 use_ssl = 2; /* 2 = allow selfsigned */
299 ietf_version = atoi(optarg);
315 signal(SIGINT, sighandler);
317 address = argv[optind];
320 * create the websockets context. This tracks open connections and
321 * knows how to route any traffic and which protocol version to use,
322 * and if each connection is client or server side.
324 * For this client-only demo, we tell it to not listen on any port.
327 info.port = CONTEXT_PORT_NO_LISTEN;
328 info.protocols = protocols;
329 #ifndef LWS_NO_EXTENSIONS
330 info.extensions = lws_get_internal_extensions();
335 context = lws_create_context(&info);
336 if (context == NULL) {
337 fprintf(stderr, "Creating libwebsocket context failed\n");
342 * sit there servicing the websocket context to handle incoming
343 * packets, and drawing random circles on the mirror protocol websocket
345 * nothing happens until the client websocket connection is
346 * asynchronously established... calling lws_client_connect() only
347 * instantiates the connection logically, lws_service() progresses it
351 while (!force_exit) {
353 if (!wsi_dumb && ratelimit_connects(&rl_dumb, 2)) {
354 lwsl_notice("dumb: connecting\n");
355 wsi_dumb = lws_client_connect(context, address, port,
356 use_ssl, "/", argv[optind], argv[optind],
357 protocols[PROTOCOL_DUMB_INCREMENT].name,
361 if (!wsi_mirror && ratelimit_connects(&rl_mirror, 2)) {
362 lwsl_notice("mirror: connecting\n");
363 wsi_mirror = lws_client_connect(context,
364 address, port, use_ssl, "/",
365 argv[optind], argv[optind],
366 protocols[PROTOCOL_LWS_MIRROR].name,
370 lws_service(context, 500);
373 lwsl_err("Exiting\n");
374 lws_context_destroy(context);
379 fprintf(stderr, "Usage: libwebsockets-test-client "
380 "<server address> [--port=<p>] "
381 "[--ssl] [-k] [-v <ver>] "
382 "[-d <log bitfield>] [-l]\n");