src/m_serial.cc

   1 ///
   2 /// \file       m_serial.cc
   3 ///             Mode class for serial / GPRS modem mode
   4 ///
   5
   6 /*
   7     Copyright (C) 2008-2012, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #include "m_serial.h"
  23 #include "controller.h"
  24 #include "protostructs.h"
  25 #include "endian.h"
  26 #include "debug.h"
  27 #include <stdexcept>
  28
  29 namespace Barry { namespace Mode {
  30
  31 //////////////////////////////////////////////////////////////////////////////
  32 // Mode::Serial class
  33
  34 Serial::Serial( Controller &con,
  35                 DeviceDataCallback callback,
  36                 void *callback_context)
  37         : m_con(con)
  38         , m_ModeSocket(0)
  39         , m_CtrlSocket(0)
  40         , m_callback(callback)
  41         , m_callback_context(callback_context)
  42 {
  43         if( !m_con.HasQueue() )
  44                 throw std::logic_error("A SocketRoutingQueue is required in the Controller class when using Mode::Serial.");
  45 }
  46
  47 Serial::~Serial()
  48 {
  49 }
  50
  51
  52 //////////////////////////////////////////////////////////////////////////////
  53 // protected API / static functions
  54
  55 void Serial::DataCallback(Serial &ser, Data *data)
  56 {
  57         ddout("Serial::DataCallback called");
  58
  59         if( data->GetSize() <= 4 )
  60                 return; // nothing to do
  61
  62         // call callback if available
  63         if( ser.m_callback ) {
  64                 (*ser.m_callback)(ser.m_callback_context,
  65                         data->GetData() + 4,
  66                         data->GetSize() - 4);
  67         }
  68 //      else {
  69 //              // append data to readCache
  70 //              FIXME;
  71 //      }
  72 }
  73
  74 void Serial::CtrlCallback(Serial &ser, Data *data)
  75 {
  76         // just dump to stdout, and do nothing
  77         ddout("CtrlCallback received:\n" << *data);
  78 }
  79
  80 //////////////////////////////////////////////////////////////////////////////
  81 // public API
  82
  83 void Serial::Open(const char *password)
  84 {
  85         if( m_ModeSocket ) {
  86                 m_data->Close();
  87                 m_data.reset();
  88                 m_ModeSocket = 0;
  89         }
  90
  91         if( m_CtrlSocket ) {
  92                 m_ctrl->Close();
  93                 m_ctrl.reset();
  94                 m_CtrlSocket = 0;
  95         }
  96
  97         m_ModeSocket = m_con.SelectMode(Controller::UsbSerData);
  98         m_data = m_con.OpenSocket(m_ModeSocket, password);
  99
 100         m_CtrlSocket = m_con.SelectMode(Controller::UsbSerCtrl);
 101         m_ctrl = m_con.OpenSocket(m_CtrlSocket, password);
 102
 103         // register callback for incoming data, for speed
 104         SocketRoutingQueue::SocketDataHandlerPtr data_callback
 105                 (new SocketRoutingQueue::SimpleSocketDataHandler<Serial>(*this, DataCallback));
 106         m_data->UnregisterInterest();
 107         m_data->RegisterInterest(data_callback);
 108         SocketRoutingQueue::SocketDataHandlerPtr ctrl_callback
 109                 (new SocketRoutingQueue::SimpleSocketDataHandler<Serial>(*this, CtrlCallback));
 110         m_ctrl->UnregisterInterest();
 111         m_ctrl->RegisterInterest(ctrl_callback);
 112
 113         const unsigned char start[] =
 114                 { 0, 0, 0x0a, 0, 0x01, 0x01, 0xc2, 0x00, 0x40, 0x00 };
 115         Data block(start, sizeof(start));
 116         m_ctrl->RawSend(block);
 117 }
 118
 119 void Serial::Close()
 120 {
 121         ddout("Serial:: Closing connection.");
 122 }
 123
 124 /*
 125 // FIXME - if this behaviour is truly common between modes, create
 126 // a common base class for this.
 127 void Serial::RetryPassword(const char *password)
 128 {
 129         if( m_data.get() || m_ctrl.get() )
 130                 throw std::logic_error("Socket already open in Serial::RetryPassword");
 131
 132         m_data = m_con.m_zero.OpenDBSocket(m_ModeSocket, password);
 133         m_ctrl = m_con.m_zero.OpenDBSocket(m_CtrlSocket, password);
 134
 135         // register callback for incoming data, for speed
 136         m_data->UnregisterInterest();
 137         m_data->RegisterInterest(DataCallback, this);
 138 }
 139 */
 140
 141 /*
 142 // can be called from separate thread
 143 void Serial::SerialRead(Data &data, int timeout)
 144 {
 145         m_socket.Receive(data, timeout);
 146 }
 147 */
 148
 149 void Serial::Write(const Data &data, int timeout)
 150 {
 151         if( data.GetSize() <= 0 )
 152                 return; // nothing to do
 153
 154         if( !m_data.get() )
 155                 throw std::logic_error("Must call Open() before Write() in Mode::Serial");
 156
 157         // filter data for PPP, and prepend 4 bytes
 158         Data &filtered = m_filter.Write(data, 4);
 159
 160         // setup header (only size needed, as socket will be set by socket class)
 161         unsigned char *buf = filtered.GetBuffer();
 162         MAKE_PACKETPTR_BUF(spack, buf);
 163         spack->size = htobs(filtered.GetSize());
 164
 165         // send via appropriate socket
 166         m_data->RawSend(filtered, timeout);
 167 }
 168
 169 }} // namespace Barry::Mode
 170