PPPNetIf.cpp

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 #include "PPPNetIf.h"
00025 #include "mbed.h"
00026 #include "ppp/ppp.h"
00027 #include "lwip/init.h"
00028 #include "lwip/sio.h"
00029 
00030 #define __DEBUG
00031 #include "dbg/dbg.h"
00032 
00033 #include "netCfg.h"
00034 #if NET_PPP
00035 
00036 #define PPP_TIMEOUT 60000
00037 
00038 #define BUF_SIZE 256
00039 
00040 PPPNetIf::PPPNetIf(GPRSModem* pIf) : LwipNetIf(), m_pIf(pIf),/* m_open(false),*/ m_connected(false), m_status(PPP_DISCONNECTED), m_fd(0) //, m_id(0)
00041 {
00042   //FIXME: Check static refcount
00043   m_buf = new uint8_t[BUF_SIZE];
00044 }
00045 
00046 PPPNetIf::~PPPNetIf()
00047 {
00048   delete[] m_buf;
00049 }
00050 
00051 #if 0
00052 PPPErr PPPNetIf::open(Serial* pSerial)
00053 {
00054   GPRSErr err = m_pIf->open(pSerial);
00055   if(err)
00056     return PPP_MODEM;
00057   m_open = true;
00058   #if 0
00059   m_id = sioMgr::registerSerialIf(this);
00060   if(!m_id)
00061   {
00062     close();
00063     return PPP_CLOSED;
00064   }
00065   #endif
00066   return PPP_OK;
00067 }
00068 #endif
00069 
00070 
00071 PPPErr PPPNetIf::GPRSConnect(const char* apn, const char* userId, const char* password) //Connect using GPRS
00072 {
00073   LwipNetIf::init();
00074   pppInit();
00075   //TODO: Tell ATIf that we get ownership of the serial port
00076     
00077   GPRSErr gprsErr;
00078   gprsErr = m_pIf->connect(apn);
00079   if(gprsErr)
00080     return PPP_NETWORK;
00081     
00082   DBG("PPPNetIf: If Connected.\n");
00083 
00084   if( userId == NULL )
00085     pppSetAuth(PPPAUTHTYPE_NONE, NULL, NULL);
00086   else
00087     pppSetAuth(PPPAUTHTYPE_PAP, userId, password); //TODO: Allow CHAP as well
00088     
00089   DBG("PPPNetIf: Set Auth.\n");
00090   
00091   //wait(1.);
00092   
00093   //m_pIf->flushBuffer(); //Flush buffer before passing serial port to PPP
00094   
00095   m_status = PPP_CONNECTING;
00096   DBG("m_pIf = %p\n", m_pIf);
00097   int res = pppOverSerialOpen((void*)m_pIf, sPppCallback, (void*)this);
00098   DBG("PPP connected\n");
00099   if(res<0)
00100   {
00101     disconnect();
00102     return PPP_PROTOCOL;
00103   }
00104   
00105   DBG("PPPNetIf: PPP Started with res = %d.\n", res);
00106   
00107   m_fd = res;
00108   m_connected = true;
00109   Timer t;
00110   t.start();
00111   while( m_status == PPP_CONNECTING ) //Wait for callback
00112   {
00113     poll();
00114     if(t.read_ms()>PPP_TIMEOUT)
00115     {
00116       DBG("PPPNetIf: Timeout.\n");  
00117       disconnect();
00118       return PPP_PROTOCOL;
00119     }
00120   }
00121   
00122   DBG("PPPNetIf: Callback returned.\n");
00123   
00124   if( m_status == PPP_DISCONNECTED )
00125   {
00126     disconnect();
00127     return PPP_PROTOCOL;
00128   }
00129   
00130   return PPP_OK;
00131 
00132 }
00133 
00134 PPPErr PPPNetIf::ATConnect(const char* number) //Connect using a "classic" voice modem or GSM
00135 {
00136   //TODO: IMPL
00137   return PPP_MODEM;
00138 }
00139 
00140 PPPErr PPPNetIf::disconnect()
00141 {
00142   if(m_fd)
00143     pppClose(m_fd); //0 if ok, else should gen a WARN
00144   m_connected = false;
00145   
00146   m_pIf->flushBuffer();
00147   m_pIf->printf("+++\r\n");
00148   wait(.5);
00149   m_pIf->flushBuffer();
00150   
00151   GPRSErr gprsErr;  
00152   gprsErr = m_pIf->disconnect();
00153   if(gprsErr)
00154     return PPP_NETWORK;
00155     
00156   return PPP_OK;
00157 }
00158 
00159 #if 0
00160 PPPErr PPPNetIf::close()
00161 {
00162   GPRSErr err = m_pIf->close();
00163   if(err)
00164     return PPP_MODEM;
00165   m_open = false;
00166   return PPP_OK;
00167 }
00168 #endif
00169 
00170 
00171 #if 0
00172 //We have to use :
00173 
00174 /** Pass received raw characters to PPPoS to be decoded. This function is
00175  * thread-safe and can be called from a dedicated RX-thread or from a main-loop.
00176  *
00177  * @param pd PPP descriptor index, returned by pppOpen()
00178  * @param data received data
00179  * @param len length of received data
00180  */
00181 void
00182 pppos_input(int pd, u_char* data, int len)
00183 {
00184   pppInProc(&pppControl[pd].rx, data, len);
00185 }
00186 #endif
00187 
00188 void PPPNetIf::poll()
00189 {
00190   if(!m_connected)
00191     return;
00192   LwipNetIf::poll();
00193   //static u8_t buf[128];
00194   int len;
00195   do
00196   {
00197     len = sio_tryread((sio_fd_t) m_pIf, m_buf, BUF_SIZE);
00198     if(len > 0)
00199       pppos_input(m_fd, m_buf, len);
00200   } while(len>0);
00201 }
00202 
00203 //Link Callback
00204 void PPPNetIf::pppCallback(int errCode, void *arg)
00205 {
00206   switch ( errCode )
00207   {
00208     //No error
00209     case PPPERR_NONE:
00210       {
00211         struct ppp_addrs* addrs = (struct ppp_addrs*) arg;
00212         m_ip = IpAddr(&(addrs->our_ipaddr)); //Set IP
00213       }
00214       m_status = PPP_CONNECTED;
00215       break;
00216     default:
00217       //Disconnected
00218       DBG("PPPNetIf: Callback errCode = %d.\n", errCode);
00219       m_status = PPP_DISCONNECTED;
00220     break;
00221   }
00222 }
00223 
00224 #endif