rename ipc/ to control/

control/IpcListener.cpp

@@ -0,0 +1,164 @@
+/*
+ * 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 "IpcListener.hpp"
+
+#ifndef __WINDOWS__
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#endif
+
+namespace ZeroTier {
+
+IpcListener::IpcListener(const char *ep,void (*commandHandler)(void *,IpcConnection *,IpcConnection::EventType,const char *),void *arg) :
+	_endpoint(ep),
+	_handler(commandHandler),
+	_arg(arg),
+#ifdef __WINDOWS__
+	_run(true),
+	_running(true)
+#else
+	_sock(0)
+#endif
+{
+#ifndef __WINDOWS__
+	struct sockaddr_un unaddr;
+	unaddr.sun_family = AF_UNIX;
+	strncpy(unaddr.sun_path,_endpoint.c_str(),sizeof(unaddr.sun_path));
+	unaddr.sun_path[sizeof(unaddr.sun_path) - 1] = (char)0;
+
+	struct stat stattmp;
+	if (stat(_endpoint.c_str(),&stattmp)) {
+		int testSock = socket(AF_UNIX,SOCK_STREAM,0);
+		if (testSock <= 0)
+			throw std::runtime_error("unable to create socket of type AF_UNIX");
+		if (connect(testSock,(struct sockaddr *)&unaddr,sizeof(unaddr))) {
+			// error means nothing is listening, orphaned name
+			::close(testSock);
+		} else {
+			// success means endpoint is being actively listened to by a process
+			::close(testSock);
+			throw std::runtime_error("IPC endpoint address in use");
+		}
+	}
+	::unlink(_endpoint.c_str());
+
+	_sock = socket(AF_UNIX,SOCK_STREAM,0);
+	if (_sock <= 0)
+		throw std::runtime_error("unable to create socket of type AF_UNIX");
+	if (bind(_sock,(struct sockaddr *)&unaddr,sizeof(unaddr))) {
+		::close(_sock);
+		throw std::runtime_error("IPC endpoint could not be bound");
+	}
+	if (listen(_sock,8)) {
+		::close(_sock);
+		throw std::runtime_error("listen() failed for bound AF_UNIX socket");
+	}
+	::chmod(_endpoint.c_str(),0777);
+#endif
+
+	_thread = Thread::start(this);
+}
+
+IpcListener::~IpcListener()
+{
+#ifdef __WINDOWS__
+	_run = false;
+	while (_running) {
+		Thread::cancelIO(_thread);
+		HANDLE tmp = CreateFileA(_endpoint.c_str(),GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,NULL,OPEN_EXISTING,0,NULL);
+		if (tmp != INVALID_HANDLE_VALUE)
+			CloseHandle(tmp);
+		Sleep(250);
+	}
+#else
+	int s = _sock;
+	_sock = 0;
+	if (s > 0) {
+		::shutdown(s,SHUT_RDWR);
+		::close(s);
+	}
+	Thread::join(_thread);
+	::unlink(_endpoint.c_str());
+#endif
+}
+
+void IpcListener::threadMain()
+	throw()
+{
+#ifdef __WINDOWS__
+	HANDLE s;
+	while (_run) {
+		s = CreateNamedPipeA(_endpoint.c_str(),PIPE_ACCESS_DUPLEX,PIPE_READMODE_BYTE|PIPE_TYPE_BYTE|PIPE_WAIT,PIPE_UNLIMITED_INSTANCES,1024,1024,0,NULL);
+		if (s != INVALID_HANDLE_VALUE) {
+			if ((ConnectNamedPipe(s,NULL))||(GetLastError() == ERROR_PIPE_CONNECTED)) {
+				if (!_run) {
+					DisconnectNamedPipe(s);
+					CloseHandle(s);
+					break;
+				}
+				try {
+					_handler(_arg,new IpcConnection(s,_handler,_arg),IpcConnection::IPC_EVENT_NEW_CONNECTION,(const char *)0);
+				} catch ( ... ) {} // handlers should not throw
+			} else {
+				CloseHandle(s);
+			}
+		}
+	}
+	_running = false;
+#else
+	struct sockaddr_un unaddr;
+	socklen_t socklen;
+	int s;
+	while (_sock > 0) {
+		unaddr.sun_family = AF_UNIX;
+		strncpy(unaddr.sun_path,_endpoint.c_str(),sizeof(unaddr.sun_path));
+		unaddr.sun_path[sizeof(unaddr.sun_path) - 1] = (char)0;
+		socklen = sizeof(unaddr);
+		s = accept(_sock,(struct sockaddr *)&unaddr,&socklen);
+		if (s <= 0)
+			break;
+		if (!_sock) {
+			::close(s);
+			break;
+		}
+		try {
+			_handler(_arg,new IpcConnection(s,_handler,_arg),IpcConnection::IPC_EVENT_NEW_CONNECTION,(const char *)0);
+		} catch ( ... ) {} // handlers should not throw
+	}
+#endif
+}
+
+} // namespace ZeroTier