IPC stuff for Unix.

node/IpcConnection.cpp

@@ -0,0 +1,138 @@
+/*
+ * 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"
+
+#ifdef __WINDOWS__
+#include <WinSock2.h>
+#include <Windows.h>
+#else
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#endif
+
+namespace ZeroTier {
+
+IpcConnection::IpcConnection(const char *endpoint,void (*commandHandler)(void *,const SharedPtr<IpcConnection> &,const char *),void *arg) :
+	_handler(commandHandler),
+	_arg(arg),
+	_sock(0)
+{
+	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");
+	}
+
+	Thread::start(this);
+}
+
+IpcConnection::IpcConnection(int s,void (*commandHandler)(void *,const SharedPtr<IpcConnection> &,const char *),void *arg) :
+	_handler(commandHandler),
+	_arg(arg),
+	_sock(s)
+{
+	Thread::start(this);
+}
+
+IpcConnection::~IpcConnection()
+{
+	this->close();
+}
+
+void IpcConnection::printf(const char *format,...)
+{
+	va_list ap;
+	int n;
+	char tmp[65536];
+
+	Mutex::Lock _l(_writeLock);
+
+	if (_sock <= 0)
+		return;
+
+	va_start(ap,format);
+	n = (int)::vsnprintf(tmp,sizeof(tmp),format,ap);
+	va_end(ap);
+
+	::write(_sock,tmp,n);
+}
+
+void IpcConnection::close()
+{
+	Mutex::Lock _l(_writeLock);
+	int s = _sock;
+	_sock = 0;
+	if (s > 0) {
+		::shutdown(s,SHUT_RDWR);
+		::close(s);
+	}
+	Thread::join(_thread);
+}
+
+void IpcConnection::threadMain()
+	throw()
+{
+	char tmp[65536];
+	char linebuf[65536];
+	unsigned int lineptr = 0;
+
+	while (_sock) {
+		int n = (int)::read(_sock,tmp,sizeof(tmp));
+		if (n <= 0)
+			break;
+		for(int i=0;i<n;++i) {
+			char c = (linebuf[lineptr] = tmp[i]);
+			if ((c == '\r')||(c == '\n')||(lineptr == (sizeof(linebuf) - 1))) {
+				if (lineptr) {
+					linebuf[lineptr] = (char)0;
+					_handler(_arg,SharedPtr<IpcConnection>(this),linebuf);
+					lineptr = 0;
+				}
+			} else ++lineptr;
+		}
+	}
+}
+
+} // namespace ZeroTier