New git repository for release - version 0.2.0 tagged

1 files changed, 163 insertions, 0 deletions

diff --git a/node/UdpSocket.cpp b/node/UdpSocket.cpp
new file mode 100644
index 00000000..95156fcc
--- /dev/null
+++ b/node/UdpSocket.cpp
@@ -0,0 +1,163 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2012-2013  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 <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+
+#ifdef _WIN32
+#include <Windows.h>
+#else
+#include <unistd.h>
+#include <signal.h>
+#endif
+
+#include "UdpSocket.hpp"
+#include "RuntimeEnvironment.hpp"
+#include "Logger.hpp"
+#include "Switch.hpp"
+
+namespace ZeroTier {
+
+UdpSocket::UdpSocket(
+	int localPort,
+	bool ipv6,
+	void (*packetHandler)(UdpSocket *,void *,const InetAddress &,const void *,unsigned int),
+	void *arg)
+	throw(std::runtime_error) :
+	Thread(),
+	_packetHandler(packetHandler),
+	_arg(arg),
+	_localPort(localPort),
+	_sock(0),
+	_v6(ipv6)
+{
+	int yes,no;
+
+	if ((localPort <= 0)||(localPort > 0xffff))
+		throw std::runtime_error("port is out of range");
+
+	if (ipv6) {
+		_sock = socket(AF_INET6,SOCK_DGRAM,0);
+		if (_sock <= 0)
+			throw std::runtime_error("unable to create IPv6 SOCK_DGRAM socket");
+
+		yes = 1; setsockopt(_sock,IPPROTO_IPV6,IPV6_V6ONLY,(void *)&yes,sizeof(yes));
+		no = 0; setsockopt(_sock,SOL_SOCKET,SO_REUSEADDR,(void *)&no,sizeof(no));
+#ifdef IP_DONTFRAG
+		no = 0; setsockopt(_sock,IPPROTO_IP,IP_DONTFRAG,&no,sizeof(no));
+#endif
+#ifdef IP_MTU_DISCOVER
+		no = 0; setsockopt(_sock,IPPROTO_IP,IP_MTU_DISCOVER,&no,sizeof(no));
+#endif
+#ifdef IPV6_MTU_DISCOVER
+		no = 0; setsockopt(_sock,IPPROTO_IPV6,IPV6_MTU_DISCOVER,&no,sizeof(no));
+#endif
+
+		struct sockaddr_in6 sin6;
+		memset(&sin6,0,sizeof(sin6));
+		sin6.sin6_family = AF_INET6;
+		sin6.sin6_port = htons(localPort);
+		memcpy(&(sin6.sin6_addr),&in6addr_any,sizeof(struct in6_addr));
+		if (::bind(_sock,(const struct sockaddr *)&sin6,sizeof(sin6))) {
+			::close(_sock);
+			throw std::runtime_error("unable to bind to port");
+		}
+	} else {
+		_sock = socket(AF_INET,SOCK_DGRAM,0);
+		if (_sock <= 0)
+			throw std::runtime_error("unable to create IPv4 SOCK_DGRAM socket");
+
+		no = 0; setsockopt(_sock,SOL_SOCKET,SO_REUSEADDR,(void *)&no,sizeof(no));
+#ifdef IP_DONTFRAG
+		no = 0; setsockopt(_sock,IPPROTO_IP,IP_DONTFRAG,&no,sizeof(no));
+#endif
+#ifdef IP_MTU_DISCOVER
+		no = 0; setsockopt(_sock,IPPROTO_IP,IP_MTU_DISCOVER,&no,sizeof(no));
+#endif
+
+		struct sockaddr_in sin;
+		memset(&sin,0,sizeof(sin));
+		sin.sin_family = AF_INET;
+		sin.sin_port = htons(localPort);
+		sin.sin_addr.s_addr = INADDR_ANY;
+		if (::bind(_sock,(const struct sockaddr *)&sin,sizeof(sin))) {
+			::close(_sock);
+			throw std::runtime_error("unable to bind to port");
+		}
+	}
+
+	start();
+}
+
+UdpSocket::~UdpSocket()
+{
+	close(_sock);
+}
+
+bool UdpSocket::send(const InetAddress &to,const void *data,unsigned int len,int hopLimit)
+	throw()
+{
+	Mutex::Lock _l(_sendLock);
+	if (to.isV6()) {
+		if (!_v6)
+			return false;
+		setsockopt(_sock,IPPROTO_IPV6,IPV6_UNICAST_HOPS,&hopLimit,sizeof(hopLimit));
+		return ((int)sendto(_sock,data,len,0,to.saddr(),to.saddrLen()) == (int)len);
+	} else {
+		if (_v6)
+			return false;
+		setsockopt(_sock,IPPROTO_IP,IP_TTL,&hopLimit,sizeof(hopLimit));
+		return ((int)sendto(_sock,data,len,0,to.saddr(),to.saddrLen()) == (int)len);
+	}
+}
+
+void UdpSocket::main()
+	throw()
+{
+	char buf[32768];
+	InetAddress from;
+	socklen_t salen;
+	int n;
+
+	for(;;) {
+		salen = from.saddrSpaceLen();
+		n = (int)recvfrom(_sock,buf,sizeof(buf),0,from.saddr(),&salen);
+		if (n < 0) {
+			if ((errno != EINTR)&&(errno != ETIMEDOUT))
+				break;
+		} else if (n > 0)
+			_packetHandler(this,_arg,from,buf,(unsigned int)n);
+	}
+}
+
+} // namespace ZeroTier