| /* |
| * 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> |
| |
| static unsigned int opts; |
| |
| /* |
| * 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_context * this, |
| struct libwebsocket *wsi, |
| enum libwebsocket_callback_reasons reason, |
| void *user, void *in, size_t len) |
| { |
| switch (reason) { |
| |
| case LWS_CALLBACK_CLIENT_RECEIVE: |
| ((char *)in)[len] = '\0'; |
| fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* lws-mirror_protocol */ |
| |
| |
| static int |
| callback_lws_mirror(struct libwebsocket_context * this, |
| struct libwebsocket *wsi, |
| enum libwebsocket_callback_reasons reason, |
| void *user, void *in, size_t len) |
| { |
| unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 + |
| LWS_SEND_BUFFER_POST_PADDING]; |
| int l; |
| |
| switch (reason) { |
| |
| case LWS_CALLBACK_CLIENT_ESTABLISHED: |
| |
| /* |
| * start the ball rolling, |
| * LWS_CALLBACK_CLIENT_WRITEABLE will come next service |
| */ |
| |
| libwebsocket_callback_on_writable(this, wsi); |
| break; |
| |
| case LWS_CALLBACK_CLIENT_RECEIVE: |
| /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */ |
| break; |
| |
| case LWS_CALLBACK_CLIENT_WRITEABLE: |
| |
| l = sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING], |
| "c #%06X %d %d %d;", |
| (int)random() & 0xffffff, |
| (int)random() % 500, |
| (int)random() % 250, |
| (int)random() % 24); |
| |
| libwebsocket_write(wsi, |
| &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT); |
| |
| /* get notified as soon as we can write again */ |
| |
| libwebsocket_callback_on_writable(this, wsi); |
| |
| /* |
| * without at least this delay, we choke the browser |
| * and the connection stalls, despite we now take care about |
| * flow control |
| */ |
| |
| usleep(200); |
| 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' }, |
| { "killmask", no_argument, NULL, 'k' }, |
| { "version", required_argument, NULL, 'v' }, |
| { 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; |
| struct libwebsocket *wsi_dumb; |
| struct libwebsocket *wsi_mirror; |
| int ietf_version = -1; /* latest */ |
| |
| fprintf(stderr, "libwebsockets test client\n" |
| "(C) Copyright 2010 Andy Green <andy@warmcat.com> " |
| "licensed under LGPL2.1\n"); |
| |
| if (argc < 2) |
| goto usage; |
| |
| while (n >= 0) { |
| n = getopt_long(argc, argv, "v:khsp:", options, NULL); |
| if (n < 0) |
| continue; |
| switch (n) { |
| case 's': |
| use_ssl = 2; /* 2 = allow selfsigned */ |
| break; |
| case 'p': |
| port = atoi(optarg); |
| break; |
| case 'k': |
| opts = LWS_WRITE_CLIENT_IGNORE_XOR_MASK; |
| break; |
| case 'v': |
| ietf_version = atoi(optarg); |
| break; |
| case 'h': |
| goto usage; |
| } |
| } |
| |
| if (optind >= argc) |
| goto usage; |
| |
| address = argv[optind]; |
| |
| /* |
| * 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, 0); |
| 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, use_ssl, |
| "/", argv[optind], argv[optind], |
| protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version); |
| |
| 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, |
| use_ssl, "/", argv[optind], argv[optind], |
| protocols[PROTOCOL_LWS_MIRROR].name, ietf_version); |
| |
| 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) |
| n = libwebsocket_service(context, 1000); |
| |
| libwebsocket_context_destroy(context); |
| |
| return 0; |
| |
| usage: |
| fprintf(stderr, "Usage: libwebsockets-test-client " |
| "<server address> [--port=<p>] " |
| "[--ssl] [-k] [-v <ver>]\n"); |
| return 1; |
| } |