mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-29 17:28:52 +00:00
133 lines
3.4 KiB
C++
133 lines
3.4 KiB
C++
/*
|
|
* ZeroTier One - Global Peer to Peer Ethernet
|
|
* Copyright (C) 2011-2014 ZeroTier Networks LLC
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* --
|
|
*
|
|
* ZeroTier may be used and distributed under the terms of the GPLv3, which
|
|
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
|
|
*
|
|
* If you would like to embed ZeroTier into a commercial application or
|
|
* redistribute it in a modified binary form, please contact ZeroTier Networks
|
|
* LLC. Start here: http://www.zerotier.com/
|
|
*/
|
|
|
|
#ifndef ZT_SERVICE_HPP
|
|
#define ZT_SERVICE_HPP
|
|
|
|
#include <string>
|
|
#include <stdexcept>
|
|
|
|
#include "Constants.hpp"
|
|
#include "Dictionary.hpp"
|
|
#include "Thread.hpp"
|
|
#include "Mutex.hpp"
|
|
|
|
/**
|
|
* Maximum size of a service message in bytes (sanity limit)
|
|
*/
|
|
#define ZT_SERVICE_MAX_MESSAGE_SIZE 131072
|
|
|
|
namespace ZeroTier {
|
|
|
|
class RuntimeEnvironment;
|
|
|
|
#ifndef __WINDOWS__
|
|
/**
|
|
* A subprocess that communicates with the host via a simple protocol
|
|
*
|
|
* This is currently only supported on *nix systems, and is used to implement
|
|
* special plugins that are used by supernodes and network configuration
|
|
* master nodes. Users will probably have no use for it.
|
|
*
|
|
* The simple binary protocol consists of a bidirectional stream of string-
|
|
* serialized Dictionaries prefixed by a 32-bit message length. Input
|
|
* messages are sent to the subprocess via its stdin, and output is read
|
|
* from its stdout. Messages printed by the subprocess on its stderr are
|
|
* logged via the standard Logger instance. If the subprocess dies, an
|
|
* attempt is made to restart it every second.
|
|
*/
|
|
class Service
|
|
{
|
|
public:
|
|
/**
|
|
* Create and launch a new service
|
|
*
|
|
* @param renv Runtime environment
|
|
* @param name Name of service
|
|
* @param path Path to service binary
|
|
* @param handler Handler function to call when service generates output
|
|
* @param arg First argument to service
|
|
*/
|
|
Service(const RuntimeEnvironment *renv,
|
|
const char *name,
|
|
const char *path,
|
|
void (*handler)(void *,Service &,const Dictionary &),
|
|
void *arg);
|
|
|
|
~Service();
|
|
|
|
/**
|
|
* Send a message to service subprocess
|
|
*
|
|
* @param msg Message in key/value dictionary form
|
|
* @return True if message was sent
|
|
*/
|
|
bool send(const Dictionary &msg);
|
|
|
|
/**
|
|
* @return Name of service
|
|
*/
|
|
inline const char *name() const
|
|
throw()
|
|
{
|
|
return _name.c_str();
|
|
}
|
|
|
|
/**
|
|
* @return True if subprocess is running
|
|
*/
|
|
inline bool running() const
|
|
throw()
|
|
{
|
|
return (_pid > 0);
|
|
}
|
|
|
|
/**
|
|
* Thread main method; do not call elsewhere
|
|
*/
|
|
void threadMain()
|
|
throw();
|
|
|
|
private:
|
|
const RuntimeEnvironment *_r;
|
|
Thread _thread;
|
|
std::string _path;
|
|
std::string _name;
|
|
void *_arg;
|
|
void (*_handler)(void *,Service &,const Dictionary &);
|
|
long _pid;
|
|
int _childStdin;
|
|
int _childStdout;
|
|
int _childStderr;
|
|
volatile bool _run;
|
|
};
|
|
#endif // __WINDOWS__
|
|
|
|
} // namespace ZeroTier
|
|
|
|
#endif
|