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https://github.com/warmcat/libwebsockets.git
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8e0c98484e
Noticed previously the test client lifetime is decoupled from the actual send activity. With SSL if the connection starts but there is a period of SSL-layer "blocking" (actually fail-and-retry) the mirror lifetime could be exhausted before the connection really completed, making it stall after it was then closed. This corrects that so connection lifetime management is done in the send callback. Signed-off-by: Andy Green <andy.green@linaro.org>
347 lines
8 KiB
C
347 lines
8 KiB
C
/*
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* libwebsockets-test-client - libwebsockets test implementation
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*
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* Copyright (C) 2011 Andy Green <andy@warmcat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation:
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* version 2.1 of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <string.h>
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#include "../lib/libwebsockets.h"
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static unsigned int opts;
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static int was_closed;
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static int deny_deflate;
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static int deny_mux;
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static struct libwebsocket *wsi_mirror;
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static int mirror_lifetime = 0;
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/*
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* This demo shows how to connect multiple websockets simultaneously to a
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* websocket server (there is no restriction on their having to be the same
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* server just it simplifies the demo).
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*
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* dumb-increment-protocol: we connect to the server and print the number
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* we are given
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*
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* lws-mirror-protocol: draws random circles, which are mirrored on to every
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* client (see them being drawn in every browser
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* session also using the test server)
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*/
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enum demo_protocols {
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PROTOCOL_DUMB_INCREMENT,
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PROTOCOL_LWS_MIRROR,
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/* always last */
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DEMO_PROTOCOL_COUNT
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};
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/* dumb_increment protocol */
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static int
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callback_dumb_increment(struct libwebsocket_context *this,
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struct libwebsocket *wsi,
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enum libwebsocket_callback_reasons reason,
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void *user, void *in, size_t len)
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{
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switch (reason) {
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case LWS_CALLBACK_CLOSED:
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fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
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was_closed = 1;
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break;
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case LWS_CALLBACK_CLIENT_RECEIVE:
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((char *)in)[len] = '\0';
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fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
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break;
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/* because we are protocols[0] ... */
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case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
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if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
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fprintf(stderr, "denied deflate-stream extension\n");
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return 1;
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}
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if ((strcmp(in, "x-google-mux") == 0) && deny_mux) {
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fprintf(stderr, "denied x-google-mux extension\n");
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return 1;
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}
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break;
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default:
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break;
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}
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return 0;
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}
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/* lws-mirror_protocol */
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static int
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callback_lws_mirror(struct libwebsocket_context *context,
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struct libwebsocket *wsi,
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enum libwebsocket_callback_reasons reason,
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void *user, void *in, size_t len)
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{
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unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
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LWS_SEND_BUFFER_POST_PADDING];
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int l = 0;
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int n;
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switch (reason) {
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case LWS_CALLBACK_CLOSED:
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fprintf(stderr, "mirror: LWS_CALLBACK_CLOSED\n");
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wsi_mirror = NULL;
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break;
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case LWS_CALLBACK_CLIENT_ESTABLISHED:
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/*
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* start the ball rolling,
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* LWS_CALLBACK_CLIENT_WRITEABLE will come next service
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*/
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libwebsocket_callback_on_writable(context, wsi);
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break;
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case LWS_CALLBACK_CLIENT_RECEIVE:
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/* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
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break;
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case LWS_CALLBACK_CLIENT_WRITEABLE:
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for (n = 0; n < 1; n++)
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l += sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING + l],
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"c #%06X %d %d %d;",
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(int)random() & 0xffffff,
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(int)random() % 500,
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(int)random() % 250,
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(int)random() % 24);
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libwebsocket_write(wsi,
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&buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
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mirror_lifetime--;
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if (!mirror_lifetime) {
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fprintf(stderr, "closing mirror session\n");
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libwebsocket_close_and_free_session(context,
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wsi_mirror, LWS_CLOSE_STATUS_GOINGAWAY);
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} else
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/* get notified as soon as we can write again */
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libwebsocket_callback_on_writable(context, wsi);
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break;
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default:
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break;
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}
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return 0;
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}
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/* list of supported protocols and callbacks */
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static struct libwebsocket_protocols protocols[] = {
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{
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"dumb-increment-protocol",
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callback_dumb_increment,
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0,
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20,
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},
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{
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"lws-mirror-protocol",
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callback_lws_mirror,
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0,
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128,
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},
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{ NULL, NULL, 0, 0 } /* end */
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};
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static struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "debug", required_argument, NULL, 'd' },
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{ "port", required_argument, NULL, 'p' },
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{ "ssl", no_argument, NULL, 's' },
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{ "version", required_argument, NULL, 'v' },
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{ "undeflated", no_argument, NULL, 'u' },
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{ "nomux", no_argument, NULL, 'n' },
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{ "longlived", no_argument, NULL, 'l' },
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{ NULL, 0, 0, 0 }
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};
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int main(int argc, char **argv)
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{
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int n = 0;
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int port = 7681;
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int use_ssl = 0;
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struct libwebsocket_context *context;
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const char *address;
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struct libwebsocket *wsi_dumb;
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int ietf_version = -1; /* latest */
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int longlived = 0;
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struct lws_context_creation_info info;
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memset(&info, 0, sizeof info);
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fprintf(stderr, "libwebsockets test client\n"
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"(C) Copyright 2010-2013 Andy Green <andy@warmcat.com> "
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"licensed under LGPL2.1\n");
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if (argc < 2)
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goto usage;
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while (n >= 0) {
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n = getopt_long(argc, argv, "nuv:hsp:d:l", options, NULL);
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if (n < 0)
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continue;
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switch (n) {
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case 'd':
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lws_set_log_level(atoi(optarg), NULL);
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break;
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case 's':
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use_ssl = 2; /* 2 = allow selfsigned */
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break;
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case 'p':
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port = atoi(optarg);
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break;
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case 'l':
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longlived = 1;
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break;
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case 'v':
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ietf_version = atoi(optarg);
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break;
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case 'u':
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deny_deflate = 1;
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break;
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case 'n':
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deny_mux = 1;
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break;
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case 'h':
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goto usage;
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}
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}
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if (optind >= argc)
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goto usage;
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address = argv[optind];
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/*
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* create the websockets context. This tracks open connections and
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* knows how to route any traffic and which protocol version to use,
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* and if each connection is client or server side.
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*
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* For this client-only demo, we tell it to not listen on any port.
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*/
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info.port = CONTEXT_PORT_NO_LISTEN;
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info.protocols = protocols;
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#ifndef LWS_NO_EXTENSIONS
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info.extensions = libwebsocket_internal_extensions;
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#endif
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info.gid = -1;
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info.uid = -1;
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context = libwebsocket_create_context(&info);
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if (context == NULL) {
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fprintf(stderr, "Creating libwebsocket context failed\n");
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return 1;
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}
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/* create a client websocket using dumb increment protocol */
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wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
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"/", argv[optind], argv[optind],
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protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
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if (wsi_dumb == NULL) {
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fprintf(stderr, "libwebsocket dumb connect failed\n");
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return -1;
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}
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fprintf(stderr, "Websocket connections opened\n");
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/*
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* sit there servicing the websocket context to handle incoming
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* packets, and drawing random circles on the mirror protocol websocket
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*/
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n = 0;
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while (n >= 0 && !was_closed) {
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n = libwebsocket_service(context, 10);
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if (n < 0)
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continue;
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if (wsi_mirror)
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continue;
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/* create a client websocket using mirror protocol */
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wsi_mirror = libwebsocket_client_connect(context,
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address, port, use_ssl, "/",
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argv[optind], argv[optind],
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protocols[PROTOCOL_LWS_MIRROR].name, ietf_version);
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if (wsi_mirror == NULL) {
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fprintf(stderr, "libwebsocket "
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"dumb connect failed\n");
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return -1;
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}
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mirror_lifetime = 10 + (random() & 1023);
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/* useful to test single connection stability */
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if (longlived)
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mirror_lifetime += 50000;
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fprintf(stderr, "opened mirror connection with "
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"%d lifetime\n", mirror_lifetime);
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/*
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* mirror_lifetime is decremented each send, when it reaches
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* zero the connection is closed in the send callback.
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* When the close callback comes, wsi_mirror is set to NULL
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* so a new connection will be opened
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*/
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}
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fprintf(stderr, "Exiting\n");
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libwebsocket_context_destroy(context);
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return 0;
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usage:
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fprintf(stderr, "Usage: libwebsockets-test-client "
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"<server address> [--port=<p>] "
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"[--ssl] [-k] [-v <ver>] "
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"[-d <log bitfield>] [-l]\n");
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return 1;
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}
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