Diff: if/net/netudpsocket.h

Revision:

0:3717b703f76d

Child:

1:e52ec2a24c6a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/if/net/netudpsocket.h	Mon May 24 10:23:42 2010 +0000
@@ -0,0 +1,83 @@
+#ifndef NETUDPSOCKET_H
+#define NETUDPSOCKET_H
+
+#include "net.h"
+#include "host.h"
+
+#include <queue>
+using std::queue;
+
+//Implements a Berkeley-like socket if
+//Can be interfaced either to lwip or a Telit module
+
+enum NetUdpSocketErr
+{
+  __NETUDPSOCKET_MIN = -0xFFFF,
+  NETUDPSOCKET_SETUP, //NetUdpSocket not properly configured
+  NETUDPSOCKET_IF, //If has problems
+  NETUDPSOCKET_MEM, //Not enough mem
+  NETUDPSOCKET_INUSE, //If/Port is in use
+//...
+  NETUDPSOCKET_OK = 0
+};
+
+enum NetUdpSocketEvent //Only one lonely event here... but who knows, maybe some day there'll be another one!
+{
+  NETUDPSOCKET_READABLE, //Data in buf
+};
+
+
+class NetUdpSocket
+{
+public:
+  NetUdpSocket();
+  virtual ~NetUdpSocket(); //close()
+  
+  virtual NetUdpSocketErr bind(const Host& me) = 0;
+  
+  virtual int /*if < 0 : NetUdpSocketErr*/ sendto(const char* buf, int len, Host* pHost) = 0;
+  virtual int /*if < 0 : NetUdpSocketErr*/ recvfrom(char* buf, int len, Host* pHost) = 0;
+
+  /* TODO NTH : printf / scanf helpers that call send/recv */
+
+  virtual NetUdpSocketErr close() = 0;
+
+  virtual NetUdpSocketErr poll() = 0;
+  
+  class CDummy;
+  //Callbacks
+  template<class T> 
+  //Linker bug : Must be defined here :(
+  void setOnEvent( T* pItem, void (T::*pMethod)(NetUdpSocketEvent) )
+  {
+    m_pCbItem = (CDummy*) pItem;
+    m_pCbMeth = (void (CDummy::*)(NetUdpSocketEvent)) pMethod;
+  }
+  
+  void resetOnEvent(); //Disable callback
+
+protected:
+  void queueEvent(NetUdpSocketEvent e);
+  void discardEvents();  
+  void flushEvents(); //to be called during polling
+
+  Host m_host;
+  Host m_client;
+  
+  friend class Net;
+  int m_refs;
+
+  bool m_closed;
+  bool m_removed;
+  
+private:
+  //We do not want to execute user code in interrupt routines, so we queue events until the server is polled
+  //If we port this to a multithreaded OS, we could avoid this (however some functions here are not thread-safe, so beware ;) )
+  void onEvent(NetUdpSocketEvent e); //To be called on poll
+  CDummy* m_pCbItem;
+  void (CDummy::*m_pCbMeth)(NetUdpSocketEvent);
+  queue<NetUdpSocketEvent> m_events;
+
+};
+
+#endif