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libwebsockets/test-server/test-client.c
Andy Green bbf93693d8 client fixups after esp8266
2016-08-10 21:23:01 +08:00

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/*
* 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, longlived, mirror_lifetime;
static struct lws *wsi_dumb, *wsi_mirror;
static struct lws *wsi_multi[3];
static volatile int force_exit;
static unsigned int opts, rl_multi[3];
static int flag_no_mirror_traffic;
#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)
{
const char *which = "http";
char which_wsi[10];
int n;
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) {
which = "dumb";
wsi_dumb = NULL;
}
if (wsi == wsi_mirror) {
which = "mirror";
wsi_mirror = NULL;
}
for (n = 0; n < ARRAY_SIZE(wsi_multi); n++)
if (wsi == wsi_multi[n]) {
sprintf(which_wsi, "multi %d", n);
which = which_wsi;
wsi_multi[n] = NULL;
}
lwsl_err("CLIENT_CONNECTION_ERROR: %s: %s %p\n", which, in);
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_CLIENT_WRITEABLE:
lwsl_notice("Client wsi %p writable\n", wsi);
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
*/
if (!flag_no_mirror_traffic)
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:
if (flag_no_mirror_traffic)
return 0;
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' },
{ "strict-ssl", no_argument, NULL, 'S' },
{ "version", required_argument, NULL, 'v' },
{ "undeflated", no_argument, NULL, 'u' },
{ "multi-test", no_argument, NULL, 'm' },
{ "nomirror", no_argument, NULL, 'n' },
{ "longlived", no_argument, NULL, 'l' },
{ "pingpong-secs", required_argument, NULL, 'P' },
{ "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, m, ret = 0, port = 7681, use_ssl = 0, ietf_version = -1;
unsigned int rl_dumb = 0, rl_mirror = 0, do_ws = 1, pp_secs = 0, do_multi = 0;
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, "Snuv:hsp:d:lC:K:A:P:m", options, NULL);
if (n < 0)
continue;
switch (n) {
case 'd':
lws_set_log_level(atoi(optarg), NULL);
break;
case 's': /* lax SSL, allow selfsigned, skip checking hostname */
use_ssl = LCCSCF_USE_SSL |
LCCSCF_ALLOW_SELFSIGNED |
LCCSCF_SKIP_SERVER_CERT_HOSTNAME_CHECK;
break;
case 'S': /* Strict SSL, no selfsigned, check server hostname */
use_ssl = LCCSCF_USE_SSL;
break;
case 'p':
port = atoi(optarg);
break;
case 'P':
pp_secs = atoi(optarg);
lwsl_notice("Setting pingpong interval to %d\n", pp_secs);
break;
case 'l':
longlived = 1;
break;
case 'v':
ietf_version = atoi(optarg);
break;
case 'u':
deny_deflate = 1;
break;
case 'm':
do_multi = 1;
break;
case 'n':
flag_no_mirror_traffic = 1;
lwsl_notice("Disabled sending mirror data (for pingpong testing)\n");
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 = LCCSCF_USE_SSL;
/*
* 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;
info.ws_ping_pong_interval = pp_secs;
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 & LCCSCF_USE_SSL)
lwsl_notice(" Using SSL\n");
else
lwsl_notice(" SSL disabled\n");
if (use_ssl & LCCSCF_ALLOW_SELFSIGNED)
lwsl_notice(" Selfsigned certs allowed\n");
else
lwsl_notice(" Cert must validate correctly (use -s to allow selfsigned)\n");
if (use_ssl & LCCSCF_SKIP_SERVER_CERT_HOSTNAME_CHECK)
lwsl_notice(" Skipping peer cert hostname check\n");
else
lwsl_notice(" Requiring peer cert hostname matches\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.
*/
m = 0;
while (!force_exit) {
if (do_multi) {
for (n = 0; n < ARRAY_SIZE(wsi_multi); n++) {
if (!wsi_multi[n] && ratelimit_connects(&rl_multi[n], 2u)) {
lwsl_notice("dumb %d: connecting\n", n);
i.protocol = protocols[PROTOCOL_DUMB_INCREMENT].name;
i.pwsi = &wsi_multi[n];
lws_client_connect_via_info(&i);
}
}
} else {
if (do_ws) {
if (!wsi_dumb && ratelimit_connects(&rl_dumb, 2u)) {
lwsl_notice("dumb: connecting\n");
i.protocol = protocols[PROTOCOL_DUMB_INCREMENT].name;
i.pwsi = &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;
i.pwsi = &wsi_mirror;
wsi_mirror = lws_client_connect_via_info(&i);
}
} else
if (!wsi_dumb && ratelimit_connects(&rl_dumb, 2u)) {
lwsl_notice("http: connecting\n");
i.pwsi = &wsi_dumb;
lws_client_connect_via_info(&i);
}
}
lws_service(context, 500);
if (do_multi) {
m++;
if (m == 10) {
m = 0;
lwsl_notice("doing lws_callback_on_writable_all_protocol\n");
lws_callback_on_writable_all_protocol(context, &protocols[PROTOCOL_DUMB_INCREMENT]);
}
}
}
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;
}
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