add tiny cross-platform TCP socket library from https://github.com/DFHack/clsocket

(todo: hook-up to Bullet cmake/premake build systems, and implement TCP alternative for UDP server)

examples/ThirdPartyLibs/clsocket/src/ActiveSocket.h

@@ -0,0 +1,91 @@
+/*---------------------------------------------------------------------------*/
+/*                                                                           */
+/* ActiveSocket.h - Active Socket Decleration                                */
+/*                                                                           */
+/* Author : Mark Carrier (mark@carrierlabs.com)                              */
+/*                                                                           */
+/*---------------------------------------------------------------------------*/
+/* Copyright (c) 2007-2009 CarrierLabs, LLC.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 4. The name "CarrierLabs" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    mark@carrierlabs.com.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MARK CARRIER ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL MARK CARRIER OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *----------------------------------------------------------------------------*/
+#ifndef __ACTIVESOCKET_H__
+#define __ACTIVESOCKET_H__
+
+#include "SimpleSocket.h"
+
+class CPassiveSocket;
+
+/// Provides a platform independent class to create an active socket.
+/// An active socket is used to create a socket which connects to a server.
+/// This type of object would be used when an application needs to send/receive
+/// data from a server.
+class CActiveSocket : public CSimpleSocket {
+public:
+    friend class CPassiveSocket;
+
+    CActiveSocket(CSocketType type = SocketTypeTcp);
+    virtual ~CActiveSocket() {
+        Close();
+    };
+
+    /// Established a connection to the address specified by pAddr.
+    /// Connection-based protocol sockets (CSocket::SocketTypeTcp) may
+    /// successfully call Open() only once, however; connectionless protocol
+    /// sockets (CSocket::SocketTypeUdp) may use Open() multiple times to
+    /// change their association.
+    ///  @param pAddr specifies the destination address to connect.
+    ///  @param nPort specifies the destination port.
+    ///  @return true if successful connection made, otherwise false.
+    virtual bool Open(const char *pAddr, uint16 nPort);
+
+private:
+    /// Utility function used to create a TCP connection, called from Open().
+    ///  @return true if successful connection made, otherwise false.
+    bool ConnectTCP(const char *pAddr, uint16 nPort);
+
+    /// Utility function used to create a UDP connection, called from Open().
+    ///  @return true if successful connection made, otherwise false.
+    bool ConnectUDP(const char *pAddr, uint16 nPort);
+
+    /// Utility function used to create a RAW connection, called from Open().
+    ///  @return true if successful connection made, otherwise false.
+    bool ConnectRAW(const char *pAddr, uint16 nPort);
+
+private:
+    struct hostent *m_pHE;
+};
+
+#endif /*  __ACTIVESOCKET_H__  */
+