搭建PVB架构，实现前端的基础布局、菜单、表格、图示等功能

libs/pvb/include/rllib/rludpsocket.h

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+/***************************************************************************
+                        rludpsocket.h  -  description
+                             -------------------
+    begin                : Tue Apr 03 2007
+    copyright            : (C) 2007 by R. Lehrig
+    email                : lehrig@t-online.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU LESSER GENERAL PUBLIC LICENSE as        *
+ *   published by the Free Software Foundation                             *
+ *                                                                         *
+ ***************************************************************************/
+#ifndef _RL_UDP_SOCKET_H_
+#define _RL_UDP_SOCKET_H_
+
+#include "rldefine.h"
+#include "rlsocket.h"
+
+#ifdef RLWIN32
+#include <winsock2.h>
+#include <windows.h>
+#include <io.h>
+#include <direct.h>
+#define  MSG_NOSIGNAL 0
+#else
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include "unistd.h"
+#endif
+
+/*! <pre>
+class for encapsulating ip  addresses
+</pre> */
+class rlIpAdr
+{
+public:
+  rlIpAdr();
+  virtual ~rlIpAdr();
+  int setAdr(const char *adr, int port);
+  int operator== (rlIpAdr &address1);
+  struct sockaddr_in address;
+};
+
+/*! <pre>
+class for encapsulating UDP socket calls
+</pre> */
+class rlUdpSocket
+{
+public:
+  rlUdpSocket(int debug = 0);
+  virtual ~rlUdpSocket();
+
+  /*! <pre>
+  setsocketopt for SOL_SOCKET level
+  </pre> */
+  int setSockopt(int opt);
+
+  /*! <pre>
+  setsocketopt with full control
+  </pre> */
+  int setSockopt(int level, int optname, void *optval, int optlen);
+
+  /*! <pre>
+  return > 0 -> socket else error
+  </pre> */
+  int bind(int port);
+
+  /*! <pre>
+  return == 0 -> timeout
+  </pre> */
+  int select(int timeout);
+
+  /*! <pre>
+  return > 0 -> number of bytes read return == 0 -> timeout else error
+  </pre> */
+  int recvfrom(void *buf, int maxlen, rlIpAdr *source, int timeout = -1);
+
+  /*! <pre>
+  return >= 0 -> number of bytes written else error
+  </pre> */
+  int sendto(const void *buf, int len, rlIpAdr *dest);
+
+  /*! <pre>
+  return >= 0 -> number of bytes written else error
+  </pre> */
+  int printf(rlIpAdr *dest, const char *format, ...);
+
+  int debug, readflag, writeflag;
+
+private:
+  struct sockaddr_in address;
+  int s;
+};
+
+#endif