| /* |
| * libwebsockets-test-client - libwebsockets test implementation |
| * |
| * Copyright (C) 2011 Andy Green <andy@warmcat.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation: |
| * version 2.1 of the License. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| * MA 02110-1301 USA |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| #include <string.h> |
| |
| |
| #include "../lib/libwebsockets.h" |
| #include <poll.h> |
| |
| /* |
| * 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 */ |
| |
| static int |
| callback_dumb_increment(struct libwebsocket *wsi, |
| enum libwebsocket_callback_reasons reason, |
| void *user, void *in, size_t len) |
| { |
| switch (reason) { |
| |
| case LWS_CALLBACK_CLIENT_RECEIVE: |
| fprintf(stderr, "rx %d '%s'\n", len, in); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* lws-mirror_protocol */ |
| |
| /* "how to draw a circle" */ |
| |
| struct coord { |
| int x; |
| int y; |
| }; |
| |
| static struct coord circle[] = { |
| |
| { 0, 240 }, |
| { 12, 239 }, |
| { 25, 238 }, |
| { 37, 237 }, |
| { 49, 234 }, |
| { 62, 231 }, |
| { 74, 228 }, |
| { 86, 224 }, |
| { 97, 219 }, |
| { 108, 213 }, |
| { 120, 207 }, |
| { 130, 201 }, |
| { 141, 194 }, |
| { 151, 186 }, |
| { 160, 178 }, |
| { 169, 169 }, |
| { 178, 160 }, |
| { 186, 151 }, |
| { 194, 141 }, |
| { 201, 130 }, |
| { 207, 120 }, |
| { 213, 108 }, |
| { 219, 97 }, |
| { 224, 86 }, |
| { 228, 74 }, |
| { 231, 62 }, |
| { 234, 49 }, |
| { 237, 37 }, |
| { 238, 25 }, |
| { 239, 12 }, |
| { 240, 0 }, |
| { 239, -12 }, |
| { 238, -25 }, |
| { 237, -37 }, |
| { 234, -49 }, |
| { 231, -62 }, |
| { 228, -74 }, |
| { 224, -86 }, |
| { 219, -97 }, |
| { 213, -108 }, |
| { 207, -120 }, |
| { 201, -130 }, |
| { 194, -141 }, |
| { 186, -151 }, |
| { 178, -160 }, |
| { 169, -169 }, |
| { 160, -178 }, |
| { 151, -186 }, |
| { 141, -194 }, |
| { 130, -201 }, |
| { 120, -207 }, |
| { 108, -213 }, |
| { 97, -219 }, |
| { 86, -224 }, |
| { 74, -228 }, |
| { 62, -231 }, |
| { 49, -234 }, |
| { 37, -237 }, |
| { 25, -238 }, |
| { 12, -239 }, |
| { 0, -240 }, |
| { -12, -239 }, |
| { -25, -238 }, |
| { -37, -237 }, |
| { -49, -234 }, |
| { -62, -231 }, |
| { -74, -228 }, |
| { -86, -224 }, |
| { -97, -219 }, |
| { -108, -213 }, |
| { -119, -207 }, |
| { -130, -201 }, |
| { -141, -194 }, |
| { -151, -186 }, |
| { -160, -178 }, |
| { -169, -169 }, |
| { -178, -160 }, |
| { -186, -151 }, |
| { -194, -141 }, |
| { -201, -130 }, |
| { -207, -120 }, |
| { -213, -108 }, |
| { -219, -97 }, |
| { -224, -86 }, |
| { -228, -74 }, |
| { -231, -62 }, |
| { -234, -49 }, |
| { -237, -37 }, |
| { -238, -25 }, |
| { -239, -12 }, |
| { -240, 0 }, |
| { -239, 12 }, |
| { -238, 25 }, |
| { -237, 37 }, |
| { -234, 49 }, |
| { -231, 62 }, |
| { -228, 74 }, |
| { -224, 86 }, |
| { -219, 97 }, |
| { -213, 108 }, |
| { -207, 120 }, |
| { -201, 130 }, |
| { -194, 141 }, |
| { -186, 151 }, |
| { -178, 160 }, |
| { -169, 169 }, |
| { -160, 178 }, |
| { -151, 186 }, |
| { -141, 194 }, |
| { -130, 201 }, |
| { -119, 207 }, |
| { -108, 213 }, |
| { -97, 219 }, |
| { -86, 224 }, |
| { -74, 228 }, |
| { -62, 231 }, |
| { -49, 234 }, |
| { -37, 237 }, |
| { -25, 238 }, |
| { -12, 239 }, |
| { 0, 240 }, |
| |
| }; |
| |
| static int |
| callback_lws_mirror(struct libwebsocket *wsi, |
| enum libwebsocket_callback_reasons reason, |
| void *user, void *in, size_t len) |
| { |
| switch (reason) { |
| |
| case LWS_CALLBACK_CLIENT_RECEIVE: |
| // fprintf(stderr, "rx %d '%s'\n", len, in); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* list of supported protocols and callbacks */ |
| |
| static struct libwebsocket_protocols protocols[] = { |
| |
| [PROTOCOL_DUMB_INCREMENT] = { |
| .name = "dumb-increment-protocol", |
| .callback = callback_dumb_increment, |
| }, |
| [PROTOCOL_LWS_MIRROR] = { |
| .name = "lws-mirror-protocol", |
| .callback = callback_lws_mirror, |
| }, |
| [DEMO_PROTOCOL_COUNT] = { /* end of list */ |
| .callback = NULL |
| } |
| }; |
| |
| static struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "port", required_argument, NULL, 'p' }, |
| { "ssl", no_argument, NULL, 's' }, |
| { NULL, 0, 0, 0 } |
| }; |
| |
| |
| int main(int argc, char **argv) |
| { |
| int n = 0; |
| int port = 7681; |
| int use_ssl = 0; |
| struct libwebsocket_context *context; |
| const char * address = argv[1]; |
| struct libwebsocket *wsi_dumb; |
| struct libwebsocket *wsi_mirror; |
| unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1024 + |
| LWS_SEND_BUFFER_POST_PADDING]; |
| int len; |
| int i = 0; |
| int xofs; |
| int yofs; |
| int oldx; |
| int oldy; |
| int scale; |
| int colour; |
| |
| fprintf(stderr, "libwebsockets test client\n" |
| "(C) Copyright 2010 Andy Green <andy@warmcat.com> " |
| "licensed under LGPL2.1\n"); |
| |
| if (argc < 2) |
| goto usage; |
| |
| optind++; |
| |
| while (n >= 0) { |
| n = getopt_long(argc, argv, "hsp:", options, NULL); |
| if (n < 0) |
| continue; |
| switch (n) { |
| case 's': |
| use_ssl = 1; |
| break; |
| case 'p': |
| port = atoi(optarg); |
| break; |
| case 'h': |
| goto usage; |
| } |
| } |
| |
| /* |
| * 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. |
| */ |
| |
| context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN, |
| protocols, NULL, NULL, -1, -1); |
| if (context == NULL) { |
| fprintf(stderr, "Creating libwebsocket context failed\n"); |
| return 1; |
| } |
| |
| |
| /* create a client websocket using dumb increment protocol */ |
| |
| wsi_dumb = libwebsocket_client_connect(context, address, port, "/", |
| "http://host", "origin", |
| protocols[PROTOCOL_DUMB_INCREMENT].name); |
| |
| if (wsi_dumb == NULL) { |
| fprintf(stderr, "libwebsocket dumb connect failed\n"); |
| return -1; |
| } |
| |
| /* create a client websocket using mirror protocol */ |
| |
| wsi_mirror = libwebsocket_client_connect(context, address, port, "/", |
| "http://host", "origin", |
| protocols[PROTOCOL_LWS_MIRROR].name); |
| |
| if (wsi_mirror == NULL) { |
| fprintf(stderr, "libwebsocket dumb connect failed\n"); |
| return -1; |
| } |
| |
| fprintf(stderr, "Websocket connections opened\n"); |
| |
| /* |
| * sit there servicing the websocket context to handle incoming |
| * packets, and drawing random circles on the mirror protocol websocket |
| */ |
| |
| n = 0; |
| while (n >= 0) { |
| |
| usleep(10000); |
| |
| if (i == sizeof circle / sizeof circle[0]) |
| i = 0; |
| |
| if (i == 0) { |
| xofs = random() % 500; |
| yofs = random() % 250; |
| scale = random() % 24; |
| if (!scale) |
| scale = 1; |
| |
| oldx = xofs + (circle[i].x / scale); |
| oldy = yofs + (circle[i].y / scale); |
| colour = random() & 0xffffff; |
| } |
| |
| len = sprintf(&buf[LWS_SEND_BUFFER_PRE_PADDING], |
| "d #%06X %d %d %d %d", colour, oldx, oldy, |
| xofs + (circle[i].x / scale), |
| yofs + (circle[i].y / scale)); |
| oldx = xofs + (circle[i].x / scale); |
| oldy = yofs + (circle[i].y / scale); |
| i++; |
| |
| libwebsocket_write(wsi_mirror, |
| &buf[LWS_SEND_BUFFER_PRE_PADDING], len, LWS_WRITE_TEXT); |
| |
| |
| n = libwebsocket_service(context, 0); |
| } |
| |
| libwebsocket_client_close(wsi_dumb); |
| libwebsocket_client_close(wsi_mirror); |
| |
| libwebsocket_context_destroy(context); |
| |
| return 0; |
| |
| usage: |
| fprintf(stderr, "Usage: libwebsockets-test-client " |
| "<server address> [--port=<p>] " |
| "[--ssl]\n"); |
| return 1; |
| } |