introduce listen on specific interface
[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 #include "../lib/libwebsockets.h"
29 #include <poll.h>
30
31 static unsigned int opts;
32 static int was_closed;
33
34 /*
35  * This demo shows how to connect multiple websockets simultaneously to a
36  * websocket server (there is no restriction on their having to be the same
37  * server just it simplifies the demo).
38  *
39  *  dumb-increment-protocol:  we connect to the server and print the number
40  *                              we are given
41  *
42  *  lws-mirror-protocol: draws random circles, which are mirrored on to every
43  *                              client (see them being drawn in every browser
44  *                              session also using the test server)
45  */
46
47 enum demo_protocols {
48
49         PROTOCOL_DUMB_INCREMENT,
50         PROTOCOL_LWS_MIRROR,
51
52         /* always last */
53         DEMO_PROTOCOL_COUNT
54 };
55
56
57 /* dumb_increment protocol */
58
59 static int
60 callback_dumb_increment(struct libwebsocket_context * this,
61                         struct libwebsocket *wsi,
62                         enum libwebsocket_callback_reasons reason,
63                                                void *user, void *in, size_t len)
64 {
65         switch (reason) {
66
67         case LWS_CALLBACK_CLIENT_RECEIVE:
68                 ((char *)in)[len] = '\0';
69                 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
70                 break;
71
72         default:
73                 break;
74         }
75
76         return 0;
77 }
78
79
80 /* lws-mirror_protocol */
81
82
83 static int
84 callback_lws_mirror(struct libwebsocket_context * this,
85                         struct libwebsocket *wsi,
86                         enum libwebsocket_callback_reasons reason,
87                                                void *user, void *in, size_t len)
88 {
89         unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
90                                                   LWS_SEND_BUFFER_POST_PADDING];
91         int l;
92
93         switch (reason) {
94
95         case LWS_CALLBACK_CLOSED:
96                 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
97                 was_closed = 1;
98                 break;
99
100         case LWS_CALLBACK_CLIENT_ESTABLISHED:
101
102                 /*
103                  * start the ball rolling,
104                  * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
105                  */
106
107                 libwebsocket_callback_on_writable(this, wsi);
108                 break;
109
110         case LWS_CALLBACK_CLIENT_RECEIVE:
111 /*              fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
112                 break;
113
114         case LWS_CALLBACK_CLIENT_WRITEABLE:
115
116                 l = sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING],
117                                         "c #%06X %d %d %d;",
118                                         (int)random() & 0xffffff,
119                                         (int)random() % 500,
120                                         (int)random() % 250,
121                                         (int)random() % 24);
122
123                 libwebsocket_write(wsi,
124                    &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
125
126                 /* get notified as soon as we can write again */
127
128                 libwebsocket_callback_on_writable(this, wsi);
129
130                 /*
131                  * without at least this delay, we choke the browser
132                  * and the connection stalls, despite we now take care about
133                  * flow control
134                  */
135
136                 usleep(200);
137                 break;
138
139         default:
140                 break;
141         }
142
143         return 0;
144 }
145
146
147 /* list of supported protocols and callbacks */
148
149 static struct libwebsocket_protocols protocols[] = {
150
151         [PROTOCOL_DUMB_INCREMENT] = {
152                 .name = "dumb-increment-protocol",
153                 .callback = callback_dumb_increment,
154         },
155         [PROTOCOL_LWS_MIRROR] = {
156                 .name = "lws-mirror-protocol",
157                 .callback = callback_lws_mirror,
158         },
159         [DEMO_PROTOCOL_COUNT] = {  /* end of list */
160                 .callback = NULL
161         }
162 };
163
164 static struct option options[] = {
165         { "help",       no_argument,            NULL, 'h' },
166         { "port",       required_argument,      NULL, 'p' },
167         { "ssl",        no_argument,            NULL, 's' },
168         { "killmask",   no_argument,            NULL, 'k' },
169         { "version",    required_argument,      NULL, 'v' },
170         { NULL, 0, 0, 0 }
171 };
172
173
174 int main(int argc, char **argv)
175 {
176         int n = 0;
177         int port = 7681;
178         int use_ssl = 0;
179         struct libwebsocket_context *context;
180         const char *address;
181         struct libwebsocket *wsi_dumb;
182         struct libwebsocket *wsi_mirror;
183         int ietf_version = -1; /* latest */
184
185         fprintf(stderr, "libwebsockets test client\n"
186                         "(C) Copyright 2010 Andy Green <andy@warmcat.com> "
187                                                     "licensed under LGPL2.1\n");
188
189         if (argc < 2)
190                 goto usage;
191
192         while (n >= 0) {
193                 n = getopt_long(argc, argv, "v:khsp:", options, NULL);
194                 if (n < 0)
195                         continue;
196                 switch (n) {
197                 case 's':
198                         use_ssl = 2; /* 2 = allow selfsigned */
199                         break;
200                 case 'p':
201                         port = atoi(optarg);
202                         break;
203                 case 'k':
204                         opts = LWS_WRITE_CLIENT_IGNORE_XOR_MASK;
205                         break;
206                 case 'v':
207                         ietf_version = atoi(optarg);
208                         break;
209                 case 'h':
210                         goto usage;
211                 }
212         }
213
214         if (optind >= argc)
215                 goto usage;
216
217         address = argv[optind];
218
219         /*
220          * create the websockets context.  This tracks open connections and
221          * knows how to route any traffic and which protocol version to use,
222          * and if each connection is client or server side.
223          *
224          * For this client-only demo, we tell it to not listen on any port.
225          */
226
227         context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN, NULL,
228                                               protocols, NULL, NULL, -1, -1, 0);
229         if (context == NULL) {
230                 fprintf(stderr, "Creating libwebsocket context failed\n");
231                 return 1;
232         }
233
234
235         /* create a client websocket using dumb increment protocol */
236
237         wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
238                         "/", argv[optind], argv[optind],
239                          protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
240
241         if (wsi_dumb == NULL) {
242                 fprintf(stderr, "libwebsocket dumb connect failed\n");
243                 return -1;
244         }
245
246         /* create a client websocket using mirror protocol */
247
248         wsi_mirror = libwebsocket_client_connect(context, address, port,
249              use_ssl,  "/", argv[optind], argv[optind],
250                              protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
251
252         if (wsi_mirror == NULL) {
253                 fprintf(stderr, "libwebsocket dumb connect failed\n");
254                 return -1;
255         }
256
257         fprintf(stderr, "Websocket connections opened\n");
258
259         /*
260          * sit there servicing the websocket context to handle incoming
261          * packets, and drawing random circles on the mirror protocol websocket
262          */
263
264         n = 0;
265         while (n >= 0 && !was_closed)
266                 n = libwebsocket_service(context, 1000);
267
268         fprintf(stderr, "Exiting\n");
269
270         libwebsocket_context_destroy(context);
271
272         return 0;
273
274 usage:
275         fprintf(stderr, "Usage: libwebsockets-test-client "
276                                              "<server address> [--port=<p>] "
277                                              "[--ssl] [-k] [-v <ver>]\n");
278         return 1;
279 }