Diff: LPC1768/if/lwip/lwipNetUdpSocket.h

Revision:

0:422060928e37

Child:

5:bc7df6da7589

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LPC1768/if/lwip/lwipNetUdpSocket.h	Fri Jun 11 16:25:22 2010 +0000
@@ -0,0 +1,79 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#ifndef LWIPNETUDPSOCKET_H
+#define LWIPNETUDPSOCKET_H
+
+#define NET_LWIP_STACK 1
+#include "lwip/ip_addr.h"
+#include "if/net/net.h"
+#include "LwipNetIf.h"
+
+#include <list>
+using std::list;
+
+//Implements NetUdpSockets over lwIP raw API
+
+struct udp_pcb; //Represents a Udp Connection, "Protocol Control Block", see rawapi.txt & udp.h
+struct pbuf; //Lwip Buffer Container
+
+typedef signed char err_t;
+
+class LwipNetUdpSocket: public NetUdpSocket
+{
+public:
+  LwipNetUdpSocket(udp_pcb* pPcb = NULL); //Passes a pcb if already created (by an accept req for instance), in that case transfers ownership
+  virtual ~LwipNetUdpSocket();
+  
+  virtual NetUdpSocketErr bind(const Host& me);
+  
+  virtual int /*if < 0 : NetUdpSocketErr*/ sendto(const char* buf, int len, Host* pHost);
+  virtual int /*if < 0 : NetUdpSocketErr*/ recvfrom(char* buf, int len, Host* pHost);
+
+  virtual NetUdpSocketErr close();
+
+  virtual NetUdpSocketErr poll();
+  
+protected:
+  volatile udp_pcb* m_pPcb;
+  
+  //Event callback from lwIp
+  void recvCb(udp_pcb* pcb, struct pbuf* p, ip_addr_t* addr, u16_t port);
+  
+private:
+  void cleanUp(); //Flush input buffer
+  struct InPacket
+  {
+    volatile pbuf* pBuf;
+    ip_addr_t addr;
+    u16_t port;
+  };
+  
+  list<InPacket> m_lInPkt;
+  
+  //Static callback : Transforms into a C++ callback
+  static void sRecvCb(void *arg, struct udp_pcb *pcb, struct pbuf *p, ip_addr_t *addr, u16_t port);
+  
+};
+
+#endif