libwebsockets/test-server/test-server-pthreads.c
2017-07-07 08:32:04 +08:00

393 lines
10 KiB
C

/*
* libwebsockets-test-server - libwebsockets test implementation
*
* Copyright (C) 2010-2016 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 "test-server.h"
#include <pthread.h>
int close_testing;
int max_poll_elements;
int debug_level = 7;
#ifdef EXTERNAL_POLL
struct lws_pollfd *pollfds;
int *fd_lookup;
int count_pollfds;
#endif
volatile int force_exit = 0;
struct lws_context *context;
#if defined(LWS_OPENSSL_SUPPORT) && defined(LWS_HAVE_SSL_CTX_set1_param)
char crl_path[1024] = "";
#endif
#define LWS_PLUGIN_STATIC
#include "../plugins/protocol_lws_mirror.c"
#include "../plugins/protocol_lws_status.c"
/*
* This mutex lock protects code that changes or relies on wsi list outside of
* the service thread. The service thread will acquire it when changing the
* wsi list and other threads should acquire it while dereferencing wsis or
* calling apis like lws_callback_on_writable_all_protocol() which
* use the wsi list and wsis from a different thread context.
*/
pthread_mutex_t lock_established_conns;
/* http server gets files from this path */
#define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/libwebsockets-test-server"
char *resource_path = LOCAL_RESOURCE_PATH;
/*
* multithreaded version - protect wsi lifecycle changes in the library
* these are called from protocol 0 callbacks
*/
void test_server_lock(int care)
{
if (care)
pthread_mutex_lock(&lock_established_conns);
}
void test_server_unlock(int care)
{
if (care)
pthread_mutex_unlock(&lock_established_conns);
}
/*
* This demo server shows how to use libwebsockets for one or more
* websocket protocols in the same server
*
* It defines the following websocket protocols:
*
* dumb-increment-protocol: once the socket is opened, an incrementing
* ascii string is sent down it every 50ms.
* If you send "reset\n" on the websocket, then
* the incrementing number is reset to 0.
*
* lws-mirror-protocol: copies any received packet to every connection also
* using this protocol, including the sender
*/
enum demo_protocols {
/* always first */
PROTOCOL_HTTP = 0,
PROTOCOL_DUMB_INCREMENT,
PROTOCOL_LWS_MIRROR,
PROTOCOL_LWS_STATUS,
/* always last */
DEMO_PROTOCOL_COUNT
};
/* list of supported protocols and callbacks */
static struct lws_protocols protocols[] = {
/* first protocol must always be HTTP handler */
{
"http-only", /* name */
callback_http, /* callback */
sizeof (struct per_session_data__http), /* per_session_data_size */
0, /* max frame size / rx buffer */
},
{
"dumb-increment-protocol",
callback_dumb_increment,
sizeof(struct per_session_data__dumb_increment),
10, /* rx buf size must be >= permessage-deflate rx size
* dumb-increment only sends very small packets, so we set
* this accordingly. If your protocol will send bigger
* things, adjust this to match */
},
LWS_PLUGIN_PROTOCOL_MIRROR,
LWS_PLUGIN_PROTOCOL_LWS_STATUS,
{ NULL, NULL, 0, 0 } /* terminator */
};
void *thread_dumb_increment(void *threadid)
{
while (!force_exit) {
/*
* this lock means wsi in the active list cannot
* disappear underneath us, because the code to add and remove
* them is protected by the same lock
*/
pthread_mutex_lock(&lock_established_conns);
lws_callback_on_writable_all_protocol(context,
&protocols[PROTOCOL_DUMB_INCREMENT]);
pthread_mutex_unlock(&lock_established_conns);
usleep(100000);
}
pthread_exit(NULL);
}
void *thread_service(void *threadid)
{
while (lws_service_tsi(context, 50, (int)(lws_intptr_t)threadid) >= 0 && !force_exit)
;
pthread_exit(NULL);
}
void sighandler(int sig)
{
force_exit = 1;
lws_cancel_service(context);
}
static const struct lws_extension exts[] = {
{
"permessage-deflate",
lws_extension_callback_pm_deflate,
"permessage-deflate; client_no_context_takeover; client_max_window_bits"
},
{
"deflate-frame",
lws_extension_callback_pm_deflate,
"deflate_frame"
},
{ NULL, NULL, NULL /* terminator */ }
};
static struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "debug", required_argument, NULL, 'd' },
{ "port", required_argument, NULL, 'p' },
{ "ssl", no_argument, NULL, 's' },
{ "allow-non-ssl", no_argument, NULL, 'a' },
{ "interface", required_argument, NULL, 'i' },
{ "closetest", no_argument, NULL, 'c' },
{ "libev", no_argument, NULL, 'e' },
{ "threads", required_argument, NULL, 'j' },
#ifndef LWS_NO_DAEMONIZE
{ "daemonize", no_argument, NULL, 'D' },
#endif
{ "resource_path", required_argument, NULL, 'r' },
{ NULL, 0, 0, 0 }
};
int main(int argc, char **argv)
{
struct lws_context_creation_info info;
char interface_name[128] = "";
const char *iface = NULL;
pthread_t pthread_dumb, pthread_service[32];
char cert_path[1024];
char key_path[1024];
int threads = 1;
int use_ssl = 0;
void *retval;
int opts = 0;
int n = 0;
#ifndef _WIN32
/* LOG_PERROR is not POSIX standard, and may not be portable */
#ifdef __sun
int syslog_options = LOG_PID;
#else
int syslog_options = LOG_PID | LOG_PERROR;
#endif
#endif
#ifndef LWS_NO_DAEMONIZE
int daemonize = 0;
#endif
/*
* take care to zero down the info struct, he contains random garbaage
* from the stack otherwise
*/
memset(&info, 0, sizeof info);
info.port = 7681;
pthread_mutex_init(&lock_established_conns, NULL);
while (n >= 0) {
n = getopt_long(argc, argv, "eci:hsap:d:Dr:j:", options, NULL);
if (n < 0)
continue;
switch (n) {
case 'j':
threads = atoi(optarg);
if (threads > ARRAY_SIZE(pthread_service)) {
lwsl_err("Max threads %lu\n",
(unsigned long)ARRAY_SIZE(pthread_service));
return 1;
}
break;
case 'e':
opts |= LWS_SERVER_OPTION_LIBEV;
break;
#ifndef LWS_NO_DAEMONIZE
case 'D':
daemonize = 1;
#if !defined(_WIN32) && !defined(__sun)
syslog_options &= ~LOG_PERROR;
#endif
break;
#endif
case 'd':
debug_level = atoi(optarg);
break;
case 's':
use_ssl = 1;
break;
case 'a':
opts |= LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT;
break;
case 'p':
info.port = atoi(optarg);
break;
case 'i':
strncpy(interface_name, optarg, sizeof interface_name);
interface_name[(sizeof interface_name) - 1] = '\0';
iface = interface_name;
break;
case 'c':
close_testing = 1;
fprintf(stderr, " Close testing mode -- closes on "
"client after 50 dumb increments"
"and suppresses lws_mirror spam\n");
break;
case 'r':
resource_path = optarg;
printf("Setting resource path to \"%s\"\n", resource_path);
break;
case 'h':
fprintf(stderr, "Usage: test-server "
"[--port=<p>] [--ssl] "
"[-d <log bitfield>] "
"[--resource_path <path>]\n");
exit(1);
}
}
#if !defined(LWS_NO_DAEMONIZE) && !defined(WIN32)
/*
* normally lock path would be /var/lock/lwsts or similar, to
* simplify getting started without having to take care about
* permissions or running as root, set to /tmp/.lwsts-lock
*/
if (daemonize && lws_daemonize("/tmp/.lwsts-lock")) {
fprintf(stderr, "Failed to daemonize\n");
return 1;
}
#endif
signal(SIGINT, sighandler);
#ifndef _WIN32
/* we will only try to log things according to our debug_level */
setlogmask(LOG_UPTO (LOG_DEBUG));
openlog("lwsts", syslog_options, LOG_DAEMON);
#endif
/* tell the library what debug level to emit and to send it to syslog */
lws_set_log_level(debug_level, lwsl_emit_syslog);
lwsl_notice("libwebsockets test server pthreads - license LGPL2.1+SLE\n");
lwsl_notice("(C) Copyright 2010-2016 Andy Green <andy@warmcat.com>\n");
printf("Using resource path \"%s\"\n", resource_path);
#ifdef EXTERNAL_POLL
max_poll_elements = getdtablesize();
pollfds = malloc(max_poll_elements * sizeof (struct lws_pollfd));
fd_lookup = malloc(max_poll_elements * sizeof (int));
if (pollfds == NULL || fd_lookup == NULL) {
lwsl_err("Out of memory pollfds=%d\n", max_poll_elements);
return -1;
}
#endif
info.iface = iface;
info.protocols = protocols;
info.extensions = exts;
info.ssl_cert_filepath = NULL;
info.ssl_private_key_filepath = NULL;
if (use_ssl) {
if (strlen(resource_path) > sizeof(cert_path) - 32) {
lwsl_err("resource path too long\n");
return -1;
}
sprintf(cert_path, "%s/libwebsockets-test-server.pem",
resource_path);
if (strlen(resource_path) > sizeof(key_path) - 32) {
lwsl_err("resource path too long\n");
return -1;
}
sprintf(key_path, "%s/libwebsockets-test-server.key.pem",
resource_path);
info.ssl_cert_filepath = cert_path;
info.ssl_private_key_filepath = key_path;
}
info.gid = -1;
info.uid = -1;
info.options = opts;
info.count_threads = threads;
info.extensions = exts;
info.max_http_header_pool = 4;
context = lws_create_context(&info);
if (context == NULL) {
lwsl_err("libwebsocket init failed\n");
return -1;
}
/* start the dumb increment thread */
n = pthread_create(&pthread_dumb, NULL, thread_dumb_increment, 0);
if (n) {
lwsl_err("Unable to create dumb thread\n");
goto done;
}
/*
* notice the actual number of threads may be capped by the library,
* so use lws_get_count_threads() to get the actual amount of threads
* initialized.
*/
for (n = 0; n < lws_get_count_threads(context); n++)
if (pthread_create(&pthread_service[n], NULL, thread_service,
(void *)(lws_intptr_t)n))
lwsl_err("Failed to start service thread\n");
/* wait for all the service threads to exit */
while ((--n) >= 0)
pthread_join(pthread_service[n], &retval);
/* wait for pthread_dumb to exit */
pthread_join(pthread_dumb, &retval);
done:
lws_context_destroy(context);
pthread_mutex_destroy(&lock_established_conns);
lwsl_notice("libwebsockets-test-server exited cleanly\n");
#ifndef _WIN32
closelog();
#endif
return 0;
}