mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-25 07:31:05 +00:00
282 lines
7.0 KiB
C++
282 lines
7.0 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/
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
|
|
#include <stdexcept>
|
|
|
|
#include "IpcConnection.hpp"
|
|
|
|
#ifndef __WINDOWS__
|
|
#include <unistd.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/select.h>
|
|
#endif
|
|
|
|
namespace ZeroTier {
|
|
|
|
IpcConnection::IpcConnection(const char *endpoint,unsigned int timeout,void (*commandHandler)(void *,IpcConnection *,IpcConnection::EventType,const char *),void *arg) :
|
|
_handler(commandHandler),
|
|
_arg(arg),
|
|
_timeout(timeout),
|
|
#ifdef __WINDOWS__
|
|
_sock(INVALID_HANDLE_VALUE),
|
|
_incoming(false),
|
|
#else
|
|
_sock(-1),
|
|
#endif
|
|
_run(true),
|
|
_running(true)
|
|
{
|
|
#ifdef __WINDOWS__
|
|
_sock = CreateFileA(endpoint,GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,NULL,OPEN_EXISTING,0,NULL);
|
|
if (_sock == INVALID_HANDLE_VALUE)
|
|
throw std::runtime_error("IPC endpoint unreachable");
|
|
DWORD pipeMode = PIPE_READMODE_BYTE;
|
|
SetNamedPipeHandleState(_sock,&pipeMode,NULL,NULL);
|
|
#else
|
|
struct sockaddr_un unaddr;
|
|
unaddr.sun_family = AF_UNIX;
|
|
strncpy(unaddr.sun_path,endpoint,sizeof(unaddr.sun_path));
|
|
unaddr.sun_path[sizeof(unaddr.sun_path) - 1] = (char)0;
|
|
|
|
_sock = socket(AF_UNIX,SOCK_STREAM,0);
|
|
if (_sock <= 0)
|
|
throw std::runtime_error("unable to create socket of type AF_UNIX");
|
|
|
|
if (connect(_sock,(struct sockaddr *)&unaddr,sizeof(unaddr))) {
|
|
::close(_sock);
|
|
throw std::runtime_error("IPC endpoint unreachable");
|
|
}
|
|
#endif
|
|
|
|
_thread = Thread::start(this);
|
|
}
|
|
|
|
#ifdef __WINDOWS__
|
|
IpcConnection::IpcConnection(HANDLE s,unsigned int timeout,void (*commandHandler)(void *,IpcConnection *,IpcConnection::EventType,const char *),void *arg) :
|
|
#else
|
|
IpcConnection::IpcConnection(int s,unsigned int timeout,void (*commandHandler)(void *,IpcConnection *,IpcConnection::EventType,const char *),void *arg) :
|
|
#endif
|
|
_handler(commandHandler),
|
|
_arg(arg),
|
|
_timeout(timeout),
|
|
_sock(s),
|
|
#ifdef __WINDOWS__
|
|
_incoming(true),
|
|
#endif
|
|
_run(true),
|
|
_running(true)
|
|
{
|
|
_thread = Thread::start(this);
|
|
}
|
|
|
|
IpcConnection::~IpcConnection()
|
|
{
|
|
_writeLock.lock();
|
|
_run = false;
|
|
_writeLock.unlock();
|
|
|
|
#ifdef __WINDOWS__
|
|
|
|
while (_running) {
|
|
Thread::cancelIO(_thread); // cause Windows to break from blocking read and detect shutdown
|
|
Sleep(100);
|
|
}
|
|
|
|
#else // !__WINDOWS__
|
|
|
|
int s = _sock;
|
|
_sock = 0;
|
|
if (s > 0) {
|
|
::shutdown(s,SHUT_RDWR);
|
|
::close(s);
|
|
}
|
|
Thread::join(_thread);
|
|
|
|
#endif // __WINDOWS__ / !__WINDOWS__
|
|
}
|
|
|
|
void IpcConnection::printf(const char *format,...)
|
|
{
|
|
va_list ap;
|
|
int n;
|
|
char tmp[65536];
|
|
|
|
va_start(ap,format);
|
|
n = (int)::vsnprintf(tmp,sizeof(tmp),format,ap);
|
|
va_end(ap);
|
|
if (n <= 0)
|
|
return;
|
|
|
|
Mutex::Lock _l(_writeLock);
|
|
|
|
#ifdef __WINDOWS__
|
|
_writeBuf.append(tmp,n);
|
|
Thread::cancelIO(_thread); // cause Windows to break from blocking read and service write buffer
|
|
#else
|
|
if (_sock > 0)
|
|
::write(_sock,tmp,n);
|
|
#endif
|
|
}
|
|
|
|
void IpcConnection::threadMain()
|
|
throw()
|
|
{
|
|
char tmp[16384];
|
|
char linebuf[16384];
|
|
unsigned int lineptr = 0;
|
|
char c;
|
|
|
|
#ifdef __WINDOWS__
|
|
|
|
DWORD n,i;
|
|
std::string wbuf;
|
|
|
|
#else // !__WINDOWS__
|
|
|
|
int s,n,i;
|
|
fd_set readfds,writefds,errorfds;
|
|
struct timeval tout;
|
|
|
|
#ifdef SO_NOSIGPIPE
|
|
if (_sock > 0) {
|
|
i = 1;
|
|
::setsockopt(_sock,SOL_SOCKET,SO_NOSIGPIPE,(char *)&i,sizeof(i));
|
|
}
|
|
#endif // SO_NOSIGPIPE
|
|
|
|
#endif // __WINDOWS__ / !__WINDOWS__
|
|
|
|
while (_run) {
|
|
|
|
#ifdef __WINDOWS__
|
|
|
|
/* Note that we do not use fucking timeouts in Windows, since it does seem
|
|
* to properly detect named pipe endpoint close. But we do use a write buffer
|
|
* because Windows won't let you divorce reading and writing threads without
|
|
* all that OVERLAPPED cruft. */
|
|
{
|
|
Mutex::Lock _l(_writeLock);
|
|
if (!_run)
|
|
break;
|
|
if (_writeBuf.length() > 0) {
|
|
wbuf.append(_writeBuf);
|
|
_writeBuf.clear();
|
|
}
|
|
}
|
|
if (wbuf.length() > 0) {
|
|
n = 0;
|
|
if ((WriteFile(_sock,wbuf.data(),(DWORD)(wbuf.length()),&n,NULL))&&(n > 0)) {
|
|
if (n < (DWORD)wbuf.length())
|
|
wbuf.erase(0,n);
|
|
else wbuf.clear();
|
|
} else if (GetLastError() != ERROR_OPERATION_ABORTED)
|
|
break;
|
|
FlushFileBuffers(_sock);
|
|
}
|
|
if (!_run)
|
|
break;
|
|
n = 0;
|
|
if ((!ReadFile(_sock,tmp,sizeof(tmp),&n,NULL))||(n <= 0)) {
|
|
if (GetLastError() == ERROR_OPERATION_ABORTED)
|
|
n = 0;
|
|
else break;
|
|
}
|
|
if (!_run)
|
|
break;
|
|
|
|
#else // !__WINDOWS__
|
|
|
|
/* So today I learned that there is no reliable way to detect a half-closed
|
|
* Unix domain socket. So to make sure we don't leave orphaned sockets around
|
|
* we just use fucking timeouts. If a socket fucking times out, we break from
|
|
* the I/O loop and terminate the thread. But this IpcConnection code is ugly
|
|
* so maybe the OS is simply offended by it and refuses to reveal its mysteries
|
|
* to me. Oh well... this IPC code will probably get canned when we go to
|
|
* local HTTP RESTful interfaces or soemthing like that. */
|
|
if ((s = _sock) <= 0)
|
|
break;
|
|
FD_ZERO(&readfds);
|
|
FD_ZERO(&writefds);
|
|
FD_ZERO(&errorfds);
|
|
FD_SET(s,&readfds);
|
|
FD_SET(s,&errorfds);
|
|
tout.tv_sec = _timeout; // use a fucking timeout
|
|
tout.tv_usec = 0;
|
|
if (select(s+1,&readfds,&writefds,&errorfds,&tout) <= 0) {
|
|
break; // socket has fucking timed out
|
|
} else {
|
|
if (FD_ISSET(s,&errorfds))
|
|
break; // socket has an exception... sometimes works
|
|
else {
|
|
n = (int)::read(s,tmp,sizeof(tmp));
|
|
if ((n <= 0)||(_sock <= 0))
|
|
break; // read returned error... sometimes works
|
|
}
|
|
}
|
|
|
|
#endif // __WINDOWS__ / !__WINDOWS__
|
|
|
|
for(i=0;i<n;++i) {
|
|
c = (linebuf[lineptr] = tmp[i]);
|
|
if ((c == '\r')||(c == '\n')||(c == (char)0)||(lineptr == (sizeof(linebuf) - 1))) {
|
|
if (lineptr) {
|
|
linebuf[lineptr] = (char)0;
|
|
_handler(_arg,this,IPC_EVENT_COMMAND,linebuf);
|
|
lineptr = 0;
|
|
}
|
|
} else ++lineptr;
|
|
}
|
|
}
|
|
|
|
_writeLock.lock();
|
|
bool r = _run;
|
|
_writeLock.unlock();
|
|
|
|
#ifdef __WINDOWS__
|
|
|
|
if (_incoming)
|
|
DisconnectNamedPipe(_sock);
|
|
CloseHandle(_sock);
|
|
_running = false;
|
|
|
|
#endif // __WINDOWS__
|
|
|
|
if (r)
|
|
_handler(_arg,this,IPC_EVENT_CONNECTION_CLOSED,(const char *)0);
|
|
}
|
|
|
|
} // namespace ZeroTier
|