/*
* libwebsockets-test-server - libwebsockets test implementation
*
* Copyright (C) 2010-2011 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
*/
#ifdef CMAKE_BUILD
#include "lws_config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <signal.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <assert.h>
#ifdef _WIN32
#include <io.h>
#ifdef EXTERNAL_POLL
#define poll WSAPoll
#endif
#else
#include <syslog.h>
#include <sys/time.h>
#include <unistd.h>
#endif
#include "../lib/libwebsockets.h"
static int close_testing;
int max_poll_elements;
#ifdef EXTERNAL_POLL
struct pollfd *pollfds;
int *fd_lookup;
int count_pollfds;
#endif
static volatile int force_exit = 0;
static struct libwebsocket_context *context;
/*
* 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,
/* always last */
DEMO_PROTOCOL_COUNT
};
#define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/libwebsockets-test-server"
char *resource_path = LOCAL_RESOURCE_PATH;
/*
* We take a strict whitelist approach to stop ../ attacks
*/
struct serveable {
const char *urlpath;
const char *mimetype;
};
struct per_session_data__http {
int fd;
};
/*
* this is just an example of parsing handshake headers, you don't need this
* in your code unless you will filter allowing connections by the header
* content
*/
static void
dump_handshake_info(struct libwebsocket *wsi)
{
int n = 0;
char buf[256];
const unsigned char *c;
do {
c = lws_token_to_string(n);
if (!c) {
n++;
continue;
}
if (!lws_hdr_total_length(wsi, n)) {
n++;
continue;
}
lws_hdr_copy(wsi, buf, sizeof buf, n);
fprintf(stderr, " %s = %s\n", (char *)c, buf);
n++;
} while (c);
}
const char * get_mimetype(const char *file)
{
int n = strlen(file);
if (n < 5)
return NULL;
if (!strcmp(&file[n - 4], ".ico"))
return "image/x-icon";
if (!strcmp(&file[n - 4], ".png"))
return "image/png";
if (!strcmp(&file[n - 5], ".html"))
return "text/html";
return NULL;
}
/* this protocol server (always the first one) just knows how to do HTTP */
static int callback_http(struct libwebsocket_context *context,
struct libwebsocket *wsi,
enum libwebsocket_callback_reasons reason, void *user,
void *in, size_t len)
{
char buf[256];
char leaf_path[1024];
char b64[64];
struct timeval tv;
int n, m;
unsigned char *p;
char *other_headers;
static unsigned char buffer[4096];
struct stat stat_buf;
struct per_session_data__http *pss =
(struct per_session_data__http *)user;
const char *mimetype;
#ifdef EXTERNAL_POLL
struct libwebsocket_pollargs *pa = (struct libwebsocket_pollargs *)in;
#endif
unsigned char *end;
switch (reason) {
case LWS_CALLBACK_HTTP:
dump_handshake_info(wsi);
if (len < 1) {
libwebsockets_return_http_status(context, wsi,
HTTP_STATUS_BAD_REQUEST, NULL);
goto try_to_reuse;
}
/* this example server has no concept of directories */
if (strchr((const char *)in + 1, '/')) {
libwebsockets_return_http_status(context, wsi,
HTTP_STATUS_FORBIDDEN, NULL);
goto try_to_reuse;
}
/* if a legal POST URL, let it continue and accept data */
if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI))
return 0;
/* check for the "send a big file by hand" example case */
if (!strcmp((const char *)in, "/leaf.jpg")) {
if (strlen(resource_path) > sizeof(leaf_path) - 10)
return -1;
sprintf(leaf_path, "%s/leaf.jpg", resource_path);
/* well, let's demonstrate how to send the hard way */
p = buffer + LWS_SEND_BUFFER_PRE_PADDING;
end = p + sizeof(buffer) - LWS_SEND_BUFFER_PRE_PADDING;
#ifdef WIN32
pss->fd = open(leaf_path, O_RDONLY | _O_BINARY);
#else
pss->fd = open(leaf_path, O_RDONLY);
#endif
if (pss->fd < 0)
return -1;
if (fstat(pss->fd, &stat_buf) < 0)
return -1;
/*
* we will send a big jpeg file, but it could be
* anything. Set the Content-Type: appropriately
* so the browser knows what to do with it.
*
* Notice we use the APIs to build the header, which
* will do the right thing for HTTP 1/1.1 and HTTP2
* depending on what connection it happens to be working
* on
*/
if (lws_add_http_header_status(context, wsi, 200, &p, end))
return 1;
if (lws_add_http_header_by_token(context, wsi,
WSI_TOKEN_HTTP_SERVER,
(unsigned char *)"libwebsockets",
13, &p, end))
return 1;
if (lws_add_http_header_by_token(context, wsi,
WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)"image/jpeg",
10, &p, end))
return 1;
if (lws_add_http_header_content_length(context, wsi,
stat_buf.st_size, &p, end))
return 1;
if (lws_finalize_http_header(context, wsi, &p, end))
return 1;
/*
* send the http headers...
* this won't block since it's the first payload sent
* on the connection since it was established
* (too small for partial)
*
* Notice they are sent using LWS_WRITE_HTTP_HEADERS
* which also means you can't send body too in one step,
* this is mandated by changes in HTTP2
*/
n = libwebsocket_write(wsi,
buffer + LWS_SEND_BUFFER_PRE_PADDING,
p - (buffer + LWS_SEND_BUFFER_PRE_PADDING),
LWS_WRITE_HTTP_HEADERS);
if (n < 0) {
close(pss->fd);
return -1;
}
/*
* book us a LWS_CALLBACK_HTTP_WRITEABLE callback
*/
libwebsocket_callback_on_writable(context, wsi);
break;
}
/* if not, send a file the easy way */
strcpy(buf, resource_path);
if (strcmp(in, "/")) {
if (*((const char *)in) != '/')
strcat(buf, "/");
strncat(buf, in, sizeof(buf) - strlen(resource_path));
} else /* default file to serve */
strcat(buf, "/test.html");
buf[sizeof(buf) - 1] = '\0';
/* refuse to serve files we don't understand */
mimetype = get_mimetype(buf);
if (!mimetype) {
lwsl_err("Unknown mimetype for %s\n", buf);
libwebsockets_return_http_status(context, wsi,
HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE, NULL);
return -1;
}
/* demostrates how to set a cookie on / */
other_headers = NULL;
n = 0;
if (!strcmp((const char *)in, "/") &&
!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COOKIE)) {
/* this isn't very unguessable but it'll do for us */
gettimeofday(&tv, NULL);
n = sprintf(b64, "test=LWS_%u_%u_COOKIE;Max-Age=360000",
(unsigned int)tv.tv_sec,
(unsigned int)tv.tv_usec);
p = (unsigned char *)leaf_path;
if (lws_add_http_header_by_name(context, wsi,
(unsigned char *)"set-cookie:",
(unsigned char *)b64, n, &p,
(unsigned char *)leaf_path + sizeof(leaf_path)))
return 1;
n = (char *)p - leaf_path;
other_headers = leaf_path;
}
n = libwebsockets_serve_http_file(context, wsi, buf,
mimetype, other_headers, n);
if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi)))
return -1; /* error or can't reuse connection: close the socket */
/*
* notice that the sending of the file completes asynchronously,
* we'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when
* it's done
*/
break;
case LWS_CALLBACK_HTTP_BODY:
strncpy(buf, in, 20);
buf[20] = '\0';
if (len < 20)
buf[len] = '\0';
lwsl_notice("LWS_CALLBACK_HTTP_BODY: %s... len %d\n",
(const char *)buf, (int)len);
break;
case LWS_CALLBACK_HTTP_BODY_COMPLETION:
lwsl_notice("LWS_CALLBACK_HTTP_BODY_COMPLETION\n");
/* the whole of the sent body arrived, close or reuse the connection */
libwebsockets_return_http_status(context, wsi,
HTTP_STATUS_OK, NULL);
goto try_to_reuse;
case LWS_CALLBACK_HTTP_FILE_COMPLETION:
// lwsl_info("LWS_CALLBACK_HTTP_FILE_COMPLETION seen\n");
/* kill the connection after we sent one file */
goto try_to_reuse;
case LWS_CALLBACK_HTTP_WRITEABLE:
/*
* we can send more of whatever it is we were sending
*/
do {
/* we'd like the send this much */
n = sizeof(buffer) - LWS_SEND_BUFFER_PRE_PADDING;
/* but if the peer told us he wants less, we can adapt */
m = lws_get_peer_write_allowance(wsi);
/* -1 means not using a protocol that has this info */
if (m == 0)
/* right now, peer can't handle anything */
goto later;
if (m != -1 && m < n)
/* he couldn't handle that much */
n = m;
n = read(pss->fd, buffer + LWS_SEND_BUFFER_PRE_PADDING,
n);
/* problem reading, close conn */
if (n < 0)
goto bail;
/* sent it all, close conn */
if (n == 0)
goto flush_bail;
/*
* To support HTTP2, must take care about preamble space
*
* identification of when we send the last payload frame
* is handled by the library itself if you sent a
* content-length header
*/
m = libwebsocket_write(wsi,
buffer + LWS_SEND_BUFFER_PRE_PADDING,
n, LWS_WRITE_HTTP);
if (m < 0)
/* write failed, close conn */
goto bail;
/*
* http2 won't do this
*/
if (m != n)
/* partial write, adjust */
if (lseek(pss->fd, m - n, SEEK_CUR) < 0)
goto bail;
if (m) /* while still active, extend timeout */
libwebsocket_set_timeout(wsi,
PENDING_TIMEOUT_HTTP_CONTENT, 5);
/* if we have indigestion, let him clear it before eating more */
if (lws_partial_buffered(wsi))
break;
} while (!lws_send_pipe_choked(wsi));
later:
libwebsocket_callback_on_writable(context, wsi);
break;
flush_bail:
/* true if still partial pending */
if (lws_partial_buffered(wsi)) {
libwebsocket_callback_on_writable(context, wsi);
break;
}
close(pss->fd);
goto try_to_reuse;
bail:
close(pss->fd);
return -1;
/*
* callback for confirming to continue with client IP appear in
* protocol 0 callback since no websocket protocol has been agreed
* yet. You can just ignore this if you won't filter on client IP
* since the default uhandled callback return is 0 meaning let the
* connection continue.
*/
case LWS_CALLBACK_FILTER_NETWORK_CONNECTION:
/* if we returned non-zero from here, we kill the connection */
break;
#ifdef EXTERNAL_POLL
/*
* callbacks for managing the external poll() array appear in
* protocol 0 callback
*/
case LWS_CALLBACK_LOCK_POLL:
/*
* lock mutex to protect pollfd state
* called before any other POLL related callback
*/
break;
case LWS_CALLBACK_UNLOCK_POLL:
/*
* unlock mutex to protect pollfd state when
* called after any other POLL related callback
*/
break;
case LWS_CALLBACK_ADD_POLL_FD:
if (count_pollfds >= max_poll_elements) {
lwsl_err("LWS_CALLBACK_ADD_POLL_FD: too many sockets to track\n");
return 1;
}
fd_lookup[pa->fd] = count_pollfds;
pollfds[count_pollfds].fd = pa->fd;
pollfds[count_pollfds].events = pa->events;
pollfds[count_pollfds++].revents = 0;
break;
case LWS_CALLBACK_DEL_POLL_FD:
if (!--count_pollfds)
break;
m = fd_lookup[pa->fd];
/* have the last guy take up the vacant slot */
pollfds[m] = pollfds[count_pollfds];
fd_lookup[pollfds[count_pollfds].fd] = m;
break;
case LWS_CALLBACK_CHANGE_MODE_POLL_FD:
pollfds[fd_lookup[pa->fd]].events = pa->events;
break;
#endif
case LWS_CALLBACK_GET_THREAD_ID:
/*
* if you will call "libwebsocket_callback_on_writable"
* from a different thread, return the caller thread ID
* here so lws can use this information to work out if it
* should signal the poll() loop to exit and restart early
*/
/* return pthread_getthreadid_np(); */
break;
default:
break;
}
return 0;
try_to_reuse:
if (lws_http_transaction_completed(wsi))
return -1;
return 0;
}
/* dumb_increment protocol */
/*
* one of these is auto-created for each connection and a pointer to the
* appropriate instance is passed to the callback in the user parameter
*
* for this example protocol we use it to individualize the count for each
* connection.
*/
struct per_session_data__dumb_increment {
int number;
};
static int
callback_dumb_increment(struct libwebsocket_context *context,
struct libwebsocket *wsi,
enum libwebsocket_callback_reasons reason,
void *user, void *in, size_t len)
{
int n, m;
unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 512 +
LWS_SEND_BUFFER_POST_PADDING];
unsigned char *p = &buf[LWS_SEND_BUFFER_PRE_PADDING];
struct per_session_data__dumb_increment *pss = (struct per_session_data__dumb_increment *)user;
switch (reason) {
case LWS_CALLBACK_ESTABLISHED:
lwsl_info("callback_dumb_increment: "
"LWS_CALLBACK_ESTABLISHED\n");
pss->number = 0;
break;
case LWS_CALLBACK_SERVER_WRITEABLE:
n = sprintf((char *)p, "%d", pss->number++);
m = libwebsocket_write(wsi, p, n, LWS_WRITE_TEXT);
if (m < n) {
lwsl_err("ERROR %d writing to di socket\n", n);
return -1;
}
if (close_testing && pss->number == 50) {
lwsl_info("close tesing limit, closing\n");
return -1;
}
break;
case LWS_CALLBACK_RECEIVE:
// fprintf(stderr, "rx %d\n", (int)len);
if (len < 6)
break;
if (strcmp((const char *)in, "reset\n") == 0)
pss->number = 0;
break;
/*
* this just demonstrates how to use the protocol filter. If you won't
* study and reject connections based on header content, you don't need
* to handle this callback
*/
case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
dump_handshake_info(wsi);
/* you could return non-zero here and kill the connection */
break;
default:
break;
}
return 0;
}
/* lws-mirror_protocol */
#define MAX_MESSAGE_QUEUE 32
struct per_session_data__lws_mirror {
struct libwebsocket *wsi;
int ringbuffer_tail;
};
struct a_message {
void *payload;
size_t len;
};
static struct a_message ringbuffer[MAX_MESSAGE_QUEUE];
static int ringbuffer_head;
static int
callback_lws_mirror(struct libwebsocket_context *context,
struct libwebsocket *wsi,
enum libwebsocket_callback_reasons reason,
void *user, void *in, size_t len)
{
int n;
struct per_session_data__lws_mirror *pss = (struct per_session_data__lws_mirror *)user;
switch (reason) {
case LWS_CALLBACK_ESTABLISHED:
lwsl_info("callback_lws_mirror: LWS_CALLBACK_ESTABLISHED\n");
pss->ringbuffer_tail = ringbuffer_head;
pss->wsi = wsi;
break;
case LWS_CALLBACK_PROTOCOL_DESTROY:
lwsl_notice("mirror protocol cleaning up\n");
for (n = 0; n < sizeof ringbuffer / sizeof ringbuffer[0]; n++)
if (ringbuffer[n].payload)
free(ringbuffer[n].payload);
break;
case LWS_CALLBACK_SERVER_WRITEABLE:
if (close_testing)
break;
while (pss->ringbuffer_tail != ringbuffer_head) {
n = libwebsocket_write(wsi, (unsigned char *)
ringbuffer[pss->ringbuffer_tail].payload +
LWS_SEND_BUFFER_PRE_PADDING,
ringbuffer[pss->ringbuffer_tail].len,
LWS_WRITE_TEXT);
if (n < 0) {
lwsl_err("ERROR %d writing to mirror socket\n", n);
return -1;
}
if (n < ringbuffer[pss->ringbuffer_tail].len)
lwsl_err("mirror partial write %d vs %d\n",
n, ringbuffer[pss->ringbuffer_tail].len);
if (pss->ringbuffer_tail == (MAX_MESSAGE_QUEUE - 1))
pss->ringbuffer_tail = 0;
else
pss->ringbuffer_tail++;
if (((ringbuffer_head - pss->ringbuffer_tail) &
(MAX_MESSAGE_QUEUE - 1)) == (MAX_MESSAGE_QUEUE - 15))
libwebsocket_rx_flow_allow_all_protocol(
libwebsockets_get_protocol(wsi));
// lwsl_debug("tx fifo %d\n", (ringbuffer_head - pss->ringbuffer_tail) & (MAX_MESSAGE_QUEUE - 1));
if (lws_partial_buffered(wsi) || lws_send_pipe_choked(wsi)) {
libwebsocket_callback_on_writable(context, wsi);
break;
}
/*
* for tests with chrome on same machine as client and
* server, this is needed to stop chrome choking
*/
#ifdef _WIN32
Sleep(1);
#else
usleep(1);
#endif
}
break;
case LWS_CALLBACK_RECEIVE:
if (((ringbuffer_head - pss->ringbuffer_tail) &
(MAX_MESSAGE_QUEUE - 1)) == (MAX_MESSAGE_QUEUE - 1)) {
lwsl_err("dropping!\n");
goto choke;
}
if (ringbuffer[ringbuffer_head].payload)
free(ringbuffer[ringbuffer_head].payload);
ringbuffer[ringbuffer_head].payload =
malloc(LWS_SEND_BUFFER_PRE_PADDING + len +
LWS_SEND_BUFFER_POST_PADDING);
ringbuffer[ringbuffer_head].len = len;
memcpy((char *)ringbuffer[ringbuffer_head].payload +
LWS_SEND_BUFFER_PRE_PADDING, in, len);
if (ringbuffer_head == (MAX_MESSAGE_QUEUE - 1))
ringbuffer_head = 0;
else
ringbuffer_head++;
if (((ringbuffer_head - pss->ringbuffer_tail) &
(MAX_MESSAGE_QUEUE - 1)) != (MAX_MESSAGE_QUEUE - 2))
goto done;
choke:
lwsl_debug("LWS_CALLBACK_RECEIVE: throttling %p\n", wsi);
libwebsocket_rx_flow_control(wsi, 0);
// lwsl_debug("rx fifo %d\n", (ringbuffer_head - pss->ringbuffer_tail) & (MAX_MESSAGE_QUEUE - 1));
done:
libwebsocket_callback_on_writable_all_protocol(
libwebsockets_get_protocol(wsi));
break;
/*
* this just demonstrates how to use the protocol filter. If you won't
* study and reject connections based on header content, you don't need
* to handle this callback
*/
case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
dump_handshake_info(wsi);
/* you could return non-zero here and kill the connection */
break;
default:
break;
}
return 0;
}
/* list of supported protocols and callbacks */
static struct libwebsocket_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,
},
{
"lws-mirror-protocol",
callback_lws_mirror,
sizeof(struct per_session_data__lws_mirror),
128,
},
{ NULL, NULL, 0, 0 } /* terminator */
};
void sighandler(int sig)
{
force_exit = 1;
libwebsocket_cancel_service(context);
}
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' },
#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)
{
char cert_path[1024];
char key_path[1024];
int n = 0;
int use_ssl = 0;
int opts = 0;
char interface_name[128] = "";
const char *iface = NULL;
#ifndef WIN32
int syslog_options = LOG_PID | LOG_PERROR;
#endif
unsigned int ms, oldms = 0;
struct lws_context_creation_info info;
int debug_level = 7;
#ifndef LWS_NO_DAEMONIZE
int daemonize = 0;
#endif
memset(&info, 0, sizeof info);
info.port = 7681;
while (n >= 0) {
n = getopt_long(argc, argv, "eci:hsap:d:Dr:", options, NULL);
if (n < 0)
continue;
switch (n) {
case 'e':
opts |= LWS_SERVER_OPTION_LIBEV;
break;
#ifndef LWS_NO_DAEMONIZE
case 'D':
daemonize = 1;
#ifndef WIN32
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 - "
"(C) Copyright 2010-2014 Andy Green <andy@warmcat.com> - "
"licensed under LGPL2.1\n");
printf("Using resource path \"%s\"\n", resource_path);
#ifdef EXTERNAL_POLL
max_poll_elements = getdtablesize();
pollfds = malloc(max_poll_elements * sizeof (struct 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;
#ifndef LWS_NO_EXTENSIONS
info.extensions = libwebsocket_get_internal_extensions();
#endif
if (!use_ssl) {
info.ssl_cert_filepath = NULL;
info.ssl_private_key_filepath = NULL;
} else {
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;
context = libwebsocket_create_context(&info);
if (context == NULL) {
lwsl_err("libwebsocket init failed\n");
return -1;
}
n = 0;
while (n >= 0 && !force_exit) {
struct timeval tv;
gettimeofday(&tv, NULL);
/*
* This provokes the LWS_CALLBACK_SERVER_WRITEABLE for every
* live websocket connection using the DUMB_INCREMENT protocol,
* as soon as it can take more packets (usually immediately)
*/
ms = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
if ((ms - oldms) > 50) {
libwebsocket_callback_on_writable_all_protocol(&protocols[PROTOCOL_DUMB_INCREMENT]);
oldms = ms;
}
#ifdef EXTERNAL_POLL
/*
* this represents an existing server's single poll action
* which also includes libwebsocket sockets
*/
n = poll(pollfds, count_pollfds, 50);
if (n < 0)
continue;
if (n)
for (n = 0; n < count_pollfds; n++)
if (pollfds[n].revents)
/*
* returns immediately if the fd does not
* match anything under libwebsockets
* control
*/
if (libwebsocket_service_fd(context,
&pollfds[n]) < 0)
goto done;
#else
/*
* If libwebsockets sockets are all we care about,
* you can use this api which takes care of the poll()
* and looping through finding who needed service.
*
* If no socket needs service, it'll return anyway after
* the number of ms in the second argument.
*/
n = libwebsocket_service(context, 50);
#endif
}
#ifdef EXTERNAL_POLL
done:
#endif
libwebsocket_context_destroy(context);
lwsl_notice("libwebsockets-test-server exited cleanly\n");
#ifndef WIN32
closelog();
#endif
return 0;
}