2 * libwebsockets-test-client - libwebsockets test implementation
4 * Copyright (C) 2011-2016 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 *wsi, enum lws_callback_reasons reason,
76 void *user, void *in, size_t len)
80 case LWS_CALLBACK_CLIENT_ESTABLISHED:
81 lwsl_info("dumb: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
84 case LWS_CALLBACK_CLOSED:
85 lwsl_notice("dumb: LWS_CALLBACK_CLOSED\n");
89 case LWS_CALLBACK_CLIENT_RECEIVE:
90 ((char *)in)[len] = '\0';
91 lwsl_info("rx %d '%s'\n", (int)len, (char *)in);
94 /* because we are protocols[0] ... */
96 case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
97 if (wsi == wsi_dumb) {
98 lwsl_err("dumb: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
101 if (wsi == wsi_mirror) {
102 lwsl_err("mirror: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
107 case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
108 if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
109 lwsl_notice("denied deflate-stream extension\n");
112 if ((strcmp(in, "x-webkit-deflate-frame") == 0))
114 if ((strcmp(in, "deflate-frame") == 0))
126 /* lws-mirror_protocol */
130 callback_lws_mirror(struct lws *wsi, enum lws_callback_reasons reason,
131 void *user, void *in, size_t len)
133 unsigned char buf[LWS_PRE + 4096];
134 unsigned int rands[4];
139 case LWS_CALLBACK_CLIENT_ESTABLISHED:
141 lwsl_notice("mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
143 lws_get_random(lws_get_context(wsi), rands, sizeof(rands[0]));
144 mirror_lifetime = 16384 + (rands[0] & 65535);
145 /* useful to test single connection stability */
147 mirror_lifetime += 500000;
149 lwsl_info("opened mirror connection with "
150 "%d lifetime\n", mirror_lifetime);
153 * mirror_lifetime is decremented each send, when it reaches
154 * zero the connection is closed in the send callback.
155 * When the close callback comes, wsi_mirror is set to NULL
156 * so a new connection will be opened
158 * start the ball rolling,
159 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
161 lws_callback_on_writable(wsi);
164 case LWS_CALLBACK_CLOSED:
165 lwsl_notice("mirror: LWS_CALLBACK_CLOSED mirror_lifetime=%d\n", mirror_lifetime);
169 case LWS_CALLBACK_CLIENT_WRITEABLE:
170 for (n = 0; n < 1; n++) {
171 lws_get_random(lws_get_context(wsi), rands, sizeof(rands));
172 l += sprintf((char *)&buf[LWS_PRE + l],
174 rands[0] & 0xffffff, /* colour */
175 rands[1] & 511, /* x */
176 rands[2] & 255, /* y */
177 (rands[3] & 31) + 1); /* radius */
180 n = lws_write(wsi, &buf[LWS_PRE], l,
181 opts | LWS_WRITE_TEXT);
185 lwsl_err("Partial write LWS_CALLBACK_CLIENT_WRITEABLE\n");
190 if (!mirror_lifetime) {
191 lwsl_info("closing mirror session\n");
194 /* get notified as soon as we can write again */
195 lws_callback_on_writable(wsi);
206 /* list of supported protocols and callbacks */
208 static struct lws_protocols protocols[] = {
210 "dumb-increment-protocol,fake-nonexistant-protocol",
211 callback_dumb_increment,
216 "fake-nonexistant-protocol,lws-mirror-protocol",
221 { NULL, NULL, 0, 0 } /* end */
224 static const struct lws_extension exts[] = {
226 "permessage-deflate",
227 lws_extension_callback_pm_deflate,
228 "permessage-deflate; client_max_window_bits"
232 lws_extension_callback_pm_deflate,
235 { NULL, NULL, NULL /* terminator */ }
240 void sighandler(int sig)
245 static struct option options[] = {
246 { "help", no_argument, NULL, 'h' },
247 { "debug", required_argument, NULL, 'd' },
248 { "port", required_argument, NULL, 'p' },
249 { "ssl", no_argument, NULL, 's' },
250 { "version", required_argument, NULL, 'v' },
251 { "undeflated", no_argument, NULL, 'u' },
252 { "nomux", no_argument, NULL, 'n' },
253 { "longlived", no_argument, NULL, 'l' },
257 static int ratelimit_connects(unsigned int *last, unsigned int secs)
261 gettimeofday(&tv, NULL);
262 if (tv.tv_sec - (*last) < secs)
270 int main(int argc, char **argv)
272 int n = 0, ret = 0, port = 7681, use_ssl = 0, ietf_version = -1;
273 unsigned int rl_dumb = 0, rl_mirror = 0;
274 struct lws_context_creation_info info;
275 struct lws_client_connect_info i;
276 struct lws_context *context;
277 const char *prot, *p;
280 memset(&info, 0, sizeof info);
282 lwsl_notice("libwebsockets test client - license LGPL2.1+SLE\n");
283 lwsl_notice("(C) Copyright 2010-2016 Andy Green <andy@warmcat.com>\n");
289 n = getopt_long(argc, argv, "nuv:hsp:d:l", options, NULL);
294 lws_set_log_level(atoi(optarg), NULL);
297 use_ssl = 2; /* 2 = allow selfsigned */
306 ietf_version = atoi(optarg);
322 signal(SIGINT, sighandler);
324 memset(&i, 0, sizeof(i));
327 if (lws_parse_uri(argv[optind], &prot, &i.address, &i.port, &p))
330 /* add back the leading / on path */
332 strncpy(path + 1, p, sizeof(path) - 2);
333 path[sizeof(path) - 1] = '\0';
336 if (!strcmp(prot, "http") || !strcmp(prot, "ws"))
338 if (!strcmp(prot, "https") || !strcmp(prot, "wss"))
342 * create the websockets context. This tracks open connections and
343 * knows how to route any traffic and which protocol version to use,
344 * and if each connection is client or server side.
346 * For this client-only demo, we tell it to not listen on any port.
349 info.port = CONTEXT_PORT_NO_LISTEN;
350 info.protocols = protocols;
354 context = lws_create_context(&info);
355 if (context == NULL) {
356 fprintf(stderr, "Creating libwebsocket context failed\n");
361 i.ssl_connection = use_ssl;
363 i.origin = i.address;
364 i.ietf_version_or_minus_one = ietf_version;
365 i.client_exts = exts;
367 * sit there servicing the websocket context to handle incoming
368 * packets, and drawing random circles on the mirror protocol websocket
370 * nothing happens until the client websocket connection is
371 * asynchronously established... calling lws_client_connect() only
372 * instantiates the connection logically, lws_service() progresses it
376 while (!force_exit) {
378 if (!wsi_dumb && ratelimit_connects(&rl_dumb, 2u)) {
379 lwsl_notice("dumb: connecting\n");
380 i.protocol = protocols[PROTOCOL_DUMB_INCREMENT].name;
381 wsi_dumb = lws_client_connect_via_info(&i);
384 if (!wsi_mirror && ratelimit_connects(&rl_mirror, 2u)) {
385 lwsl_notice("mirror: connecting\n");
386 i.protocol = protocols[PROTOCOL_LWS_MIRROR].name;
387 wsi_mirror = lws_client_connect_via_info(&i);
390 lws_service(context, 500);
393 lwsl_err("Exiting\n");
394 lws_context_destroy(context);
399 fprintf(stderr, "Usage: libwebsockets-test-client "
400 "<server address> [--port=<p>] "
401 "[--ssl] [-k] [-v <ver>] "
402 "[-d <log bitfield>] [-l]\n");