| /* |
| * 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 <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; |
| |
| /* |
| * 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) |
| { |
| char *buf = (char *)in; |
| |
| 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: |
| while (len--) |
| putchar(*buf++); |
| break; |
| |
| case LWS_CALLBACK_COMPLETED_CLIENT_HTTP: |
| wsi_dumb = NULL; |
| force_exit = 1; |
| break; |
| |
| 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' }, |
| { 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]; |
| |
| 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:l", 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 '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")) |
| 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; |
| |
| 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; |
| } |