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,
28 #include "../lib/libwebsockets.h"
30 static unsigned int opts;
31 static int was_closed;
34 * This demo shows how to connect multiple websockets simultaneously to a
35 * websocket server (there is no restriction on their having to be the same
36 * server just it simplifies the demo).
38 * dumb-increment-protocol: we connect to the server and print the number
41 * lws-mirror-protocol: draws random circles, which are mirrored on to every
42 * client (see them being drawn in every browser
43 * session also using the test server)
48 PROTOCOL_DUMB_INCREMENT,
56 /* dumb_increment protocol */
59 callback_dumb_increment(struct libwebsocket_context * this,
60 struct libwebsocket *wsi,
61 enum libwebsocket_callback_reasons reason,
62 void *user, void *in, size_t len)
66 case LWS_CALLBACK_CLIENT_RECEIVE:
67 ((char *)in)[len] = '\0';
68 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
79 /* lws-mirror_protocol */
83 callback_lws_mirror(struct libwebsocket_context * this,
84 struct libwebsocket *wsi,
85 enum libwebsocket_callback_reasons reason,
86 void *user, void *in, size_t len)
88 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
89 LWS_SEND_BUFFER_POST_PADDING];
94 case LWS_CALLBACK_CLOSED:
95 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
99 case LWS_CALLBACK_CLIENT_ESTABLISHED:
102 * start the ball rolling,
103 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
106 libwebsocket_callback_on_writable(this, wsi);
109 case LWS_CALLBACK_CLIENT_RECEIVE:
110 /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
113 case LWS_CALLBACK_CLIENT_WRITEABLE:
115 l = sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING],
117 (int)random() & 0xffffff,
122 libwebsocket_write(wsi,
123 &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
125 /* get notified as soon as we can write again */
127 libwebsocket_callback_on_writable(this, wsi);
130 * without at least this delay, we choke the browser
131 * and the connection stalls, despite we now take care about
146 /* list of supported protocols and callbacks */
148 static struct libwebsocket_protocols protocols[] = {
150 "dumb-increment-protocol",
151 callback_dumb_increment,
155 "lws-mirror-protocol",
166 static struct option options[] = {
167 { "help", no_argument, NULL, 'h' },
168 { "port", required_argument, NULL, 'p' },
169 { "ssl", no_argument, NULL, 's' },
170 { "killmask", no_argument, NULL, 'k' },
171 { "version", required_argument, NULL, 'v' },
176 int main(int argc, char **argv)
181 struct libwebsocket_context *context;
183 struct libwebsocket *wsi_dumb;
184 struct libwebsocket *wsi_mirror;
185 int ietf_version = -1; /* latest */
187 fprintf(stderr, "libwebsockets test client\n"
188 "(C) Copyright 2010 Andy Green <andy@warmcat.com> "
189 "licensed under LGPL2.1\n");
195 n = getopt_long(argc, argv, "v:khsp:", options, NULL);
200 use_ssl = 2; /* 2 = allow selfsigned */
206 opts = LWS_WRITE_CLIENT_IGNORE_XOR_MASK;
209 ietf_version = atoi(optarg);
219 address = argv[optind];
222 * create the websockets context. This tracks open connections and
223 * knows how to route any traffic and which protocol version to use,
224 * and if each connection is client or server side.
226 * For this client-only demo, we tell it to not listen on any port.
229 context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN, NULL,
230 protocols, NULL, NULL, -1, -1, 0);
231 if (context == NULL) {
232 fprintf(stderr, "Creating libwebsocket context failed\n");
237 /* create a client websocket using dumb increment protocol */
239 wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
240 "/", argv[optind], argv[optind],
241 protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
243 if (wsi_dumb == NULL) {
244 fprintf(stderr, "libwebsocket dumb connect failed\n");
248 /* create a client websocket using mirror protocol */
250 wsi_mirror = libwebsocket_client_connect(context, address, port,
251 use_ssl, "/", argv[optind], argv[optind],
252 protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
254 if (wsi_mirror == NULL) {
255 fprintf(stderr, "libwebsocket dumb connect failed\n");
259 fprintf(stderr, "Websocket connections opened\n");
262 * sit there servicing the websocket context to handle incoming
263 * packets, and drawing random circles on the mirror protocol websocket
267 while (n >= 0 && !was_closed)
268 n = libwebsocket_service(context, 1000);
270 fprintf(stderr, "Exiting\n");
272 libwebsocket_context_destroy(context);
277 fprintf(stderr, "Usage: libwebsockets-test-client "
278 "<server address> [--port=<p>] "
279 "[--ssl] [-k] [-v <ver>]\n");