734aab20b5a0a6925f20d2933fe6af47d4168137
[platform/upstream/libwebsockets.git] / test-server / test-client.c
1 /*
2  * libwebsockets-test-client - libwebsockets test implementation
3  *
4  * Copyright (C) 2011 Andy Green <andy@warmcat.com>
5  *
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.
10  *
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.
15  *
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,
19  *  MA  02110-1301  USA
20  */
21
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <unistd.h>
25 #include <getopt.h>
26 #include <string.h>
27
28
29 #include "../lib/libwebsockets.h"
30 #include <poll.h>
31
32 /*
33  * This demo shows how to connect multiple websockets simultaneously to a
34  * websocket server (there is no restriction on their having to be the same
35  * server just it simplifies the demo).
36  *
37  *  dumb-increment-protocol:  we connect to the server and print the number
38  *                              we are given
39  *
40  *  lws-mirror-protocol: draws random circles, which are mirrored on to every
41  *                              client (see them being drawn in every browser
42  *                              session also using the test server)
43  */
44
45 enum demo_protocols {
46
47         PROTOCOL_DUMB_INCREMENT,
48         PROTOCOL_LWS_MIRROR,
49
50         /* always last */
51         DEMO_PROTOCOL_COUNT
52 };
53
54
55 /* dumb_increment protocol */
56
57 static int
58 callback_dumb_increment(struct libwebsocket *wsi,
59                         enum libwebsocket_callback_reasons reason,
60                                                void *user, void *in, size_t len)
61 {
62         switch (reason) {
63
64         case LWS_CALLBACK_CLIENT_RECEIVE:
65                 ((char *)in)[len] = '\0';
66                 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
67                 break;
68
69         default:
70                 break;
71         }
72
73         return 0;
74 }
75
76
77 /* lws-mirror_protocol */
78
79
80 static int
81 callback_lws_mirror(struct libwebsocket *wsi,
82                         enum libwebsocket_callback_reasons reason,
83                                                void *user, void *in, size_t len)
84 {
85         unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
86                                                   LWS_SEND_BUFFER_POST_PADDING];
87         int l;
88
89         switch (reason) {
90
91         case LWS_CALLBACK_CLIENT_ESTABLISHED:
92
93                 /*
94                  * start the ball rolling,
95                  * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
96                  */
97
98                 libwebsocket_callback_on_writable(wsi);
99                 break;
100
101         case LWS_CALLBACK_CLIENT_RECEIVE:
102 /*              fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
103                 break;
104
105         case LWS_CALLBACK_CLIENT_WRITEABLE:
106
107                 l = sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING],
108                                         "c #%06X %d %d %d;",
109                                         (int)random() & 0xffffff,
110                                         (int)random() % 500,
111                                         (int)random() % 250,
112                                         (int)random() % 24);
113
114                 libwebsocket_write(wsi,
115                         &buf[LWS_SEND_BUFFER_PRE_PADDING], l, LWS_WRITE_TEXT);
116
117                 /* get notified as soon as we can write again */
118
119                 libwebsocket_callback_on_writable(wsi);
120
121                 /*
122                  * without at least this delay, we choke the browser
123                  * and the connection stalls, despite we now take care about
124                  * flow control
125                  */
126
127                 usleep(200);
128                 break;
129
130         default:
131                 break;
132         }
133
134         return 0;
135 }
136
137
138 /* list of supported protocols and callbacks */
139
140 static struct libwebsocket_protocols protocols[] = {
141
142         [PROTOCOL_DUMB_INCREMENT] = {
143                 .name = "dumb-increment-protocol",
144                 .callback = callback_dumb_increment,
145         },
146         [PROTOCOL_LWS_MIRROR] = {
147                 .name = "lws-mirror-protocol",
148                 .callback = callback_lws_mirror,
149         },
150         [DEMO_PROTOCOL_COUNT] = {  /* end of list */
151                 .callback = NULL
152         }
153 };
154
155 static struct option options[] = {
156         { "help",       no_argument,            NULL, 'h' },
157         { "port",       required_argument,      NULL, 'p' },
158         { "ssl",        no_argument,            NULL, 's' },
159         { NULL, 0, 0, 0 }
160 };
161
162
163 int main(int argc, char **argv)
164 {
165         int n = 0;
166         int port = 7681;
167         int use_ssl = 0;
168         struct libwebsocket_context *context;
169         const char *address = argv[1];
170         struct libwebsocket *wsi_dumb;
171         struct libwebsocket *wsi_mirror;
172
173
174         fprintf(stderr, "libwebsockets test client\n"
175                         "(C) Copyright 2010 Andy Green <andy@warmcat.com> "
176                                                     "licensed under LGPL2.1\n");
177
178         if (argc < 2)
179                 goto usage;
180
181         optind++;
182
183         while (n >= 0) {
184                 n = getopt_long(argc, argv, "hsp:", options, NULL);
185                 if (n < 0)
186                         continue;
187                 switch (n) {
188                 case 's':
189                         use_ssl = 2; /* 2 = allow selfsigned */
190                         break;
191                 case 'p':
192                         port = atoi(optarg);
193                         break;
194                 case 'h':
195                         goto usage;
196                 }
197         }
198
199         /*
200          * create the websockets context.  This tracks open connections and
201          * knows how to route any traffic and which protocol version to use,
202          * and if each connection is client or server side.
203          *
204          * For this client-only demo, we tell it to not listen on any port.
205          */
206
207         context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN,
208                                                  protocols, NULL, NULL, -1, -1);
209         if (context == NULL) {
210                 fprintf(stderr, "Creating libwebsocket context failed\n");
211                 return 1;
212         }
213
214
215         /* create a client websocket using dumb increment protocol */
216
217         wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
218                                         "/", "http://host", "origin",
219                                        protocols[PROTOCOL_DUMB_INCREMENT].name);
220
221         if (wsi_dumb == NULL) {
222                 fprintf(stderr, "libwebsocket dumb connect failed\n");
223                 return -1;
224         }
225
226         /* create a client websocket using mirror protocol */
227
228         wsi_mirror = libwebsocket_client_connect(context, address, port,
229                                         use_ssl,  "/", "http://host", "origin",
230                                        protocols[PROTOCOL_LWS_MIRROR].name);
231
232         if (wsi_mirror == NULL) {
233                 fprintf(stderr, "libwebsocket dumb connect failed\n");
234                 return -1;
235         }
236
237         fprintf(stderr, "Websocket connections opened\n");
238
239         /*
240          * sit there servicing the websocket context to handle incoming
241          * packets, and drawing random circles on the mirror protocol websocket
242          */
243
244         n = 0;
245         while (n >= 0)
246                 n = libwebsocket_service(context, 1000);
247
248         libwebsocket_client_close(wsi_dumb);
249         libwebsocket_client_close(wsi_mirror);
250
251         libwebsocket_context_destroy(context);
252
253         return 0;
254
255 usage:
256         fprintf(stderr, "Usage: libwebsockets-test-client "
257                                              "<server address> [--port=<p>] "
258                                              "[--ssl]\n");
259         return 1;
260 }