1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551
|
/*
* libwebsockets-test-client - libwebsockets test implementation
*
* Copyright (C) 2011-2016 Andy Green <andy@warmcat.com>
*
* This file is made available under the Creative Commons CC0 1.0
* Universal Public Domain Dedication.
*
* The person who associated a work with this deed has dedicated
* the work to the public domain by waiving all of his or her rights
* to the work worldwide under copyright law, including all related
* and neighboring rights, to the extent allowed by law. You can copy,
* modify, distribute and perform the work, even for commercial purposes,
* all without asking permission.
*
* The test apps are intended to be adapted for use in your code, which
* may be proprietary. So unlike the library itself, they are licensed
* Public Domain.
*/
#include "lws_config.h"
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <signal.h>
#ifdef _WIN32
#define random rand
#include "gettimeofday.h"
#else
#include <syslog.h>
#include <sys/time.h>
#include <unistd.h>
#endif
#include "../lib/libwebsockets.h"
static int deny_deflate, deny_mux, longlived, mirror_lifetime;
static struct lws *wsi_dumb, *wsi_mirror;
static volatile int force_exit;
static unsigned int opts;
#if defined(LWS_USE_POLARSSL)
#else
#if defined(LWS_USE_MBEDTLS)
#else
#if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
char crl_path[1024] = "";
#endif
#endif
#endif
/*
* This demo shows how to connect multiple websockets simultaneously to a
* websocket server (there is no restriction on their having to be the same
* server just it simplifies the demo).
*
* dumb-increment-protocol: we connect to the server and print the number
* we are given
*
* lws-mirror-protocol: draws random circles, which are mirrored on to every
* client (see them being drawn in every browser
* session also using the test server)
*/
enum demo_protocols {
PROTOCOL_DUMB_INCREMENT,
PROTOCOL_LWS_MIRROR,
/* always last */
DEMO_PROTOCOL_COUNT
};
/*
* dumb_increment protocol
*
* since this also happens to be protocols[0], some callbacks that are not
* bound to a specific protocol also turn up here.
*/
static int
callback_dumb_increment(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
switch (reason) {
case LWS_CALLBACK_CLIENT_ESTABLISHED:
lwsl_info("dumb: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
break;
case LWS_CALLBACK_CLOSED:
lwsl_notice("dumb: LWS_CALLBACK_CLOSED\n");
wsi_dumb = NULL;
break;
case LWS_CALLBACK_CLIENT_RECEIVE:
((char *)in)[len] = '\0';
lwsl_info("rx %d '%s'\n", (int)len, (char *)in);
break;
/* because we are protocols[0] ... */
case LWS_CALLBACK_CLIENT_CONNECTION_ERROR:
if (wsi == wsi_dumb) {
lwsl_err("dumb: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
wsi_dumb = NULL;
}
if (wsi == wsi_mirror) {
lwsl_err("mirror: LWS_CALLBACK_CLIENT_CONNECTION_ERROR\n");
wsi_mirror = NULL;
}
break;
case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
lwsl_notice("denied deflate-stream extension\n");
return 1;
}
if ((strcmp(in, "x-webkit-deflate-frame") == 0))
return 1;
if ((strcmp(in, "deflate-frame") == 0))
return 1;
break;
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
{
char buffer[1024 + LWS_PRE];
char *px = buffer + LWS_PRE;
int lenx = sizeof(buffer) - LWS_PRE;
lwsl_notice("LWS_CALLBACK_RECEIVE_CLIENT_HTTP\n");
/*
* Often you need to flow control this by something
* else being writable. In that case call the api
* to get a callback when writable here, and do the
* pending client read in the writeable callback of
* the output.
*/
if (lws_http_client_read(wsi, &px, &lenx) < 0)
return -1;
while (lenx--)
putchar(*px++);
}
break;
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
wsi_dumb = NULL;
force_exit = 1;
break;
#if defined(LWS_USE_POLARSSL)
#else
#if defined(LWS_USE_MBEDTLS)
#else
#if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
case LWS_CALLBACK_OPENSSL_LOAD_EXTRA_CLIENT_VERIFY_CERTS:
if (crl_path[0]) {
/* Enable CRL checking of the server certificate */
X509_VERIFY_PARAM *param = X509_VERIFY_PARAM_new();
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
SSL_CTX_set1_param((SSL_CTX*)user, param);
X509_STORE *store = SSL_CTX_get_cert_store((SSL_CTX*)user);
X509_LOOKUP *lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
int n = X509_load_cert_crl_file(lookup, crl_path, X509_FILETYPE_PEM);
X509_VERIFY_PARAM_free(param);
if (n != 1) {
char errbuf[256];
n = ERR_get_error();
lwsl_err("LWS_CALLBACK_OPENSSL_LOAD_EXTRA_CLIENT_VERIFY_CERTS: SSL error: %s (%d)\n", ERR_error_string(n, errbuf), n);
return 1;
}
}
break;
#endif
#endif
#endif
default:
break;
}
return 0;
}
/* lws-mirror_protocol */
static int
callback_lws_mirror(struct lws *wsi, enum lws_callback_reasons reason,
void *user, void *in, size_t len)
{
unsigned char buf[LWS_PRE + 4096];
unsigned int rands[4];
int l = 0;
int n;
switch (reason) {
case LWS_CALLBACK_CLIENT_ESTABLISHED:
lwsl_notice("mirror: LWS_CALLBACK_CLIENT_ESTABLISHED\n");
lws_get_random(lws_get_context(wsi), rands, sizeof(rands[0]));
mirror_lifetime = 16384 + (rands[0] & 65535);
/* useful to test single connection stability */
if (longlived)
mirror_lifetime += 500000;
lwsl_info("opened mirror connection with "
"%d lifetime\n", mirror_lifetime);
/*
* mirror_lifetime is decremented each send, when it reaches
* zero the connection is closed in the send callback.
* When the close callback comes, wsi_mirror is set to NULL
* so a new connection will be opened
*
* start the ball rolling,
* LWS_CALLBACK_CLIENT_WRITEABLE will come next service
*/
lws_callback_on_writable(wsi);
break;
case LWS_CALLBACK_CLOSED:
lwsl_notice("mirror: LWS_CALLBACK_CLOSED mirror_lifetime=%d\n", mirror_lifetime);
wsi_mirror = NULL;
break;
case LWS_CALLBACK_CLIENT_WRITEABLE:
for (n = 0; n < 1; n++) {
lws_get_random(lws_get_context(wsi), rands, sizeof(rands));
l += sprintf((char *)&buf[LWS_PRE + l],
"c #%06X %u %u %u;",
rands[0] & 0xffffff, /* colour */
rands[1] & 511, /* x */
rands[2] & 255, /* y */
(rands[3] & 31) + 1); /* radius */
}
n = lws_write(wsi, &buf[LWS_PRE], l,
opts | LWS_WRITE_TEXT);
if (n < 0)
return -1;
if (n < l) {
lwsl_err("Partial write LWS_CALLBACK_CLIENT_WRITEABLE\n");
return -1;
}
mirror_lifetime--;
if (!mirror_lifetime) {
lwsl_info("closing mirror session\n");
return -1;
}
/* get notified as soon as we can write again */
lws_callback_on_writable(wsi);
break;
default:
break;
}
return 0;
}
/* list of supported protocols and callbacks */
static struct lws_protocols protocols[] = {
{
"dumb-increment-protocol,fake-nonexistant-protocol",
callback_dumb_increment,
0,
20,
},
{
"fake-nonexistant-protocol,lws-mirror-protocol",
callback_lws_mirror,
0,
128,
},
{ NULL, NULL, 0, 0 } /* end */
};
static const struct lws_extension exts[] = {
{
"permessage-deflate",
lws_extension_callback_pm_deflate,
"permessage-deflate; client_max_window_bits"
},
{
"deflate-frame",
lws_extension_callback_pm_deflate,
"deflate_frame"
},
{ NULL, NULL, NULL /* terminator */ }
};
void sighandler(int sig)
{
force_exit = 1;
}
static struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "debug", required_argument, NULL, 'd' },
{ "port", required_argument, NULL, 'p' },
{ "ssl", no_argument, NULL, 's' },
{ "version", required_argument, NULL, 'v' },
{ "undeflated", no_argument, NULL, 'u' },
{ "nomux", no_argument, NULL, 'n' },
{ "longlived", no_argument, NULL, 'l' },
{ "ssl-cert", required_argument, NULL, 'C' },
{ "ssl-key", required_argument, NULL, 'K' },
{ "ssl-ca", required_argument, NULL, 'A' },
#if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
{ "ssl-crl", required_argument, NULL, 'R' },
#endif
{ NULL, 0, 0, 0 }
};
static int ratelimit_connects(unsigned int *last, unsigned int secs)
{
struct timeval tv;
gettimeofday(&tv, NULL);
if (tv.tv_sec - (*last) < secs)
return 0;
*last = tv.tv_sec;
return 1;
}
int main(int argc, char **argv)
{
int n = 0, ret = 0, port = 7681, use_ssl = 0, ietf_version = -1;
unsigned int rl_dumb = 0, rl_mirror = 0, do_ws = 1;
struct lws_context_creation_info info;
struct lws_client_connect_info i;
struct lws_context *context;
const char *prot, *p;
char path[300];
char cert_path[1024] = "";
char key_path[1024] = "";
char ca_path[1024] = "";
memset(&info, 0, sizeof info);
lwsl_notice("libwebsockets test client - license LGPL2.1+SLE\n");
lwsl_notice("(C) Copyright 2010-2016 Andy Green <andy@warmcat.com>\n");
if (argc < 2)
goto usage;
while (n >= 0) {
n = getopt_long(argc, argv, "nuv:hsp:d:lC:K:A:", options, NULL);
if (n < 0)
continue;
switch (n) {
case 'd':
lws_set_log_level(atoi(optarg), NULL);
break;
case 's':
use_ssl = 2; /* 2 = allow selfsigned */
break;
case 'p':
port = atoi(optarg);
break;
case 'l':
longlived = 1;
break;
case 'v':
ietf_version = atoi(optarg);
break;
case 'u':
deny_deflate = 1;
break;
case 'n':
deny_mux = 1;
break;
case 'C':
strncpy(cert_path, optarg, sizeof(cert_path) - 1);
cert_path[sizeof(cert_path) - 1] = '\0';
break;
case 'K':
strncpy(key_path, optarg, sizeof(key_path) - 1);
key_path[sizeof(key_path) - 1] = '\0';
break;
case 'A':
strncpy(ca_path, optarg, sizeof(ca_path) - 1);
ca_path[sizeof(ca_path) - 1] = '\0';
break;
#if defined(LWS_USE_POLARSSL)
#else
#if defined(LWS_USE_MBEDTLS)
#else
#if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
case 'R':
strncpy(crl_path, optarg, sizeof(crl_path) - 1);
crl_path[sizeof(crl_path) - 1] = '\0';
break;
#endif
#endif
#endif
case 'h':
goto usage;
}
}
if (optind >= argc)
goto usage;
signal(SIGINT, sighandler);
memset(&i, 0, sizeof(i));
i.port = port;
if (lws_parse_uri(argv[optind], &prot, &i.address, &i.port, &p))
goto usage;
/* add back the leading / on path */
path[0] = '/';
strncpy(path + 1, p, sizeof(path) - 2);
path[sizeof(path) - 1] = '\0';
i.path = path;
if (!strcmp(prot, "http") || !strcmp(prot, "ws"))
use_ssl = 0;
if (!strcmp(prot, "https") || !strcmp(prot, "wss"))
if (!use_ssl)
use_ssl = 1;
/*
* create the websockets context. This tracks open connections and
* knows how to route any traffic and which protocol version to use,
* and if each connection is client or server side.
*
* For this client-only demo, we tell it to not listen on any port.
*/
info.port = CONTEXT_PORT_NO_LISTEN;
info.protocols = protocols;
info.gid = -1;
info.uid = -1;
if (use_ssl) {
info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
/*
* If the server wants us to present a valid SSL client certificate
* then we can set it up here.
*/
if (cert_path[0])
info.ssl_cert_filepath = cert_path;
if (key_path[0])
info.ssl_private_key_filepath = key_path;
/*
* A CA cert and CRL can be used to validate the cert send by the server
*/
if (ca_path[0])
info.ssl_ca_filepath = ca_path;
#if defined(LWS_USE_POLARSSL)
#else
#if defined(LWS_USE_MBEDTLS)
#else
#if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
else if (crl_path[0])
lwsl_notice("WARNING, providing a CRL requires a CA cert!\n");
#endif
#endif
#endif
if (use_ssl == 1)
lwsl_notice(" Cert must validate correctly (use -s to allow selfsigned)\n");
else
lwsl_notice(" Selfsigned certs allowed\n");
}
context = lws_create_context(&info);
if (context == NULL) {
fprintf(stderr, "Creating libwebsocket context failed\n");
return 1;
}
i.context = context;
i.ssl_connection = use_ssl;
i.host = i.address;
i.origin = i.address;
i.ietf_version_or_minus_one = ietf_version;
i.client_exts = exts;
if (!strcmp(prot, "http") || !strcmp(prot, "https")) {
lwsl_notice("using %s mode (non-ws)\n", prot);
i.method = "GET";
do_ws = 0;
} else
lwsl_notice("using %s mode (ws)\n", prot);
/*
* sit there servicing the websocket context to handle incoming
* packets, and drawing random circles on the mirror protocol websocket
*
* nothing happens until the client websocket connection is
* asynchronously established... calling lws_client_connect() only
* instantiates the connection logically, lws_service() progresses it
* asynchronously.
*/
while (!force_exit) {
if (do_ws) {
if (!wsi_dumb && ratelimit_connects(&rl_dumb, 2u)) {
lwsl_notice("dumb: connecting\n");
i.protocol = protocols[PROTOCOL_DUMB_INCREMENT].name;
wsi_dumb = lws_client_connect_via_info(&i);
}
if (!wsi_mirror && ratelimit_connects(&rl_mirror, 2u)) {
lwsl_notice("mirror: connecting\n");
i.protocol = protocols[PROTOCOL_LWS_MIRROR].name;
wsi_mirror = lws_client_connect_via_info(&i);
}
} else
if (!wsi_dumb && ratelimit_connects(&rl_dumb, 2u)) {
lwsl_notice("http: connecting\n");
wsi_dumb = lws_client_connect_via_info(&i);
}
lws_service(context, 500);
}
lwsl_err("Exiting\n");
lws_context_destroy(context);
return ret;
usage:
fprintf(stderr, "Usage: libwebsockets-test-client "
"<server address> [--port=<p>] "
"[--ssl] [-k] [-v <ver>] "
"[-d <log bitfield>] [-l]\n");
return 1;
}
|