PPPNetIf.h

00001 
00002 /*
00003 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
00004  
00005 Permission is hereby granted, free of charge, to any person obtaining a copy
00006 of this software and associated documentation files (the "Software"), to deal
00007 in the Software without restriction, including without limitation the rights
00008 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00009 copies of the Software, and to permit persons to whom the Software is
00010 furnished to do so, subject to the following conditions:
00011  
00012 The above copyright notice and this permission notice shall be included in
00013 all copies or substantial portions of the Software.
00014  
00015 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00016 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00017 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00018 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00019 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00020 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00021 THE SOFTWARE.
00022 */
00023 
00024 /** \file
00025 PPP Generic network interface header file
00026 */
00027 
00028 //This is a backend for PPP, using lwIP
00029 
00030 #ifndef PPPNETIF_H
00031 #define PPPNETIF_H
00032 
00033 #include "mbed.h"
00034 
00035 //For now, only a GPRS Modem is supported, 
00036 //but we could easily split this class into a base class + two derived classes
00037 // (PPP over GPRS + PPP over Serial Modem)
00038 #include "drv/gprs/GPRSModem.h"
00039 #include "if/lwip/LwipNetIf.h"
00040 
00041 ///PPP connection error codes
00042 enum PPPErr
00043 {
00044   __PPP_MIN = -0xFFFF,
00045   PPP_MODEM, ///<AT error returned
00046   PPP_NETWORK, ///<Network is down
00047   PPP_PROTOCOL, ///<PPP Protocol error
00048   PPP_CLOSED, ///<Connection is closed
00049   PPP_OK = 0 ///<Success
00050 };
00051 
00052 enum PPPStatus
00053 {
00054   PPP_CONNECTING,
00055   PPP_CONNECTED,
00056   PPP_DISCONNECTED,
00057 };
00058 
00059 class PPPNetIf : public LwipNetIf
00060 {
00061 public:
00062   PPPNetIf(GPRSModem* pIf);
00063   virtual ~PPPNetIf();
00064   
00065   #if 0
00066   PPPErr open(Serial* pSerial);
00067   #endif
00068   
00069   PPPErr GPRSConnect(const char* apn, const char* userId, const char* password); //Connect using GPRS
00070   PPPErr ATConnect(const char* number); //Connect using a "classic" voice modem or GSM
00071   
00072   virtual void poll();
00073   
00074   PPPErr disconnect();
00075   
00076   #if 0
00077   PPPErr close();
00078   #endif
00079   
00080 protected:
00081   GPRSModem* m_pIf;
00082   
00083 private:
00084   void pppCallback(int errCode, void *arg);
00085   
00086   static void sPppCallback(void *ctx, int errCode, void *arg) //Callback from ppp.c
00087   { return ((PPPNetIf*)ctx)->pppCallback(errCode, arg); }
00088   
00089   bool m_connected;
00090   /*bool m_open;*/
00091   volatile PPPStatus m_status;
00092   volatile int m_fd; //PPP Session descriptor
00093   
00094   //int m_id;
00095   
00096   uint8_t* m_buf;
00097 
00098 };
00099 
00100 #endif