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/*
This file is part of libmicrohttpd
Copyright (C) 2007-2018 Daniel Pittman and Christian Grothoff
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; either
version 2.1 of the License, or (at your option) any later version.
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
*/
/**
* @file lib/daemon_info.c
* @brief implementation of MHD_daemon_get_information_sz()
* @author Christian Grothoff
*/
#include "internal.h"
#include "connection_cleanup.h"
/**
* Obtain information about the given daemon.
* Use wrapper macro #MHD_daemon_get_information() instead of direct use
* of this function.
*
* @param daemon what daemon to get information about
* @param info_type what information is desired?
* @param[out] return_value pointer to union where requested information will
* be stored
* @param return_value_size size of union MHD_DaemonInformation at compile
* time
* @return #MHD_YES on success, #MHD_NO on error
* (@a info_type is unknown, NULL pointer etc.)
* @ingroup specialized
*/
enum MHD_Bool
MHD_daemon_get_information_sz (struct MHD_Daemon *daemon,
enum MHD_DaemonInformationType info_type,
union MHD_DaemonInformation *return_value,
size_t return_value_size)
{
#define CHECK_SIZE(type) if (sizeof(type) < return_value_size) \
return MHD_NO
switch (info_type)
{
case MHD_DAEMON_INFORMATION_LISTEN_SOCKET:
CHECK_SIZE (MHD_socket);
return_value->listen_socket
= daemon->listen_socket;
return MHD_YES;
#ifdef EPOLL_SUPPORT
case MHD_DAEMON_INFORMATION_EPOLL_FD:
CHECK_SIZE (int);
// FIXME: maybe return MHD_NO if we are not using EPOLL?
return_value->epoll_fd = daemon->epoll_fd;
return MHD_YES;
#endif
case MHD_DAEMON_INFORMATION_CURRENT_CONNECTIONS:
CHECK_SIZE (unsigned int);
if (MHD_TM_EXTERNAL_EVENT_LOOP == daemon->threading_mode)
{
/* Assumes that MHD_run() in not called in other thread
(of the application) at the same time. */
MHD_connection_cleanup_ (daemon);
return_value->num_connections
= daemon->connections;
}
else if (daemon->worker_pool)
{
unsigned int i;
/* Collect the connection information stored in the workers. */
return_value->num_connections = 0;
for (i = 0; i < daemon->worker_pool_size; i++)
{
/* FIXME: next line is thread-safe only if read is atomic. */
return_value->num_connections
+= daemon->worker_pool[i].connections;
}
}
else
return_value->num_connections
= daemon->connections;
return MHD_YES;
case MHD_DAEMON_INFORMATION_BIND_PORT:
CHECK_SIZE (uint16_t);
// FIXME: return MHD_NO if port is not known/UNIX?
return_value->port = daemon->listen_port;
return MHD_YES;
default:
return MHD_NO;
}
#undef CHECK_SIZE
}
/* end of daemon_info.c */
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