tools/pppob.cc

   1 ///
   2 /// \file       pppob.cc
   3 ///             In the same vein as pppoe, used with pppd to create a
   4 ///             pty tunnel and GPRS modem link.
   5 ///
   6
   7 /*
   8     Copyright (C) 2007-2012, Net Direct Inc. (http://www.netdirect.ca/)
   9
  10     This program is free software; you can redistribute it and/or modify
  11     it under the terms of the GNU General Public License as published by
  12     the Free Software Foundation; either version 2 of the License, or
  13     (at your option) any later version.
  14
  15     This program is distributed in the hope that it will be useful,
  16     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  18
  19     See the GNU General Public License in the COPYING file at the
  20     root directory of this project for more details.
  21 */
  22
  23 #include <barry/barry.h>
  24 #include <iomanip>
  25 #include <iostream>
  26 #include <fstream>
  27 #include <vector>
  28 #include <string>
  29 #include <memory>
  30 #include <stdlib.h>
  31 #include <sys/select.h>
  32 #include <sys/time.h>
  33 #include <sys/types.h>
  34 #include <unistd.h>
  35 #include <signal.h>
  36 #include "i18n.h"
  37
  38 #include "barrygetopt.h"
  39
  40 using namespace std;
  41 using namespace Barry;
  42
  43 bool data_dump = false;
  44 volatile bool signal_end = false;
  45
  46 void Usage()
  47 {
  48    int logical, major, minor;
  49    const char *Version = Barry::Version(logical, major, minor);
  50
  51    cerr
  52    << "pppob - PPP over Barry\n"
  53    << "        Copyright 2007-2012, Net Direct Inc. (http://www.netdirect.ca/)\n"
  54    << "        Using: " << Version << "\n"
  55    << "\n"
  56    << "   -l file   Direct pppob log output to file (useful with -v)\n"
  57    << "   -p pin    PIN of device to talk with\n"
  58    << "             If only one device plugged in, this flag is optional\n"
  59    << "   -P pass   Simplistic method to specify device password\n"
  60    << "   -s        Use Serial mode instead of IpModem\n"
  61    << "   -v        Dump protocol data during operation (debugging only!)\n"
  62    << endl;
  63 }
  64
  65 void signal_handler(int signum)
  66 {
  67         signal_end = true;
  68 }
  69
  70 void SerialDataCallback(void *context, const unsigned char *data, int len)
  71 {
  72         if( len && data_dump )
  73                 barryverbose("ReadThread:\n" << Data(data, len));
  74
  75         while( len ) {
  76                 int written = write(1, data, len);
  77                 if( written > 0 ) {
  78                         len -= written;
  79                         data += written;
  80                 }
  81                 else {
  82                         barryverbose("Error in write()");
  83                 }
  84         }
  85 }
  86
  87 void ProcessStdin(Modem &modem)
  88 {
  89         // Read from stdin and write to USB, until
  90         // stdin is closed
  91         Data data;
  92         int bytes_read;
  93         fd_set rfds;
  94         struct timeval tv;
  95         int ret;
  96
  97         // Handle interrupt signals from pppd
  98         signal_end = false;
  99         signal(SIGINT, &signal_handler);
 100         signal(SIGHUP, &signal_handler);
 101         signal(SIGTERM, &signal_handler);
 102
 103         FD_ZERO(&rfds);
 104         while( signal_end == false ) {
 105                 // Need to use select() here, so that pppd doesn't
 106                 // hang when it tries to set the line discipline
 107                 // on our stdin.
 108
 109                 FD_SET(0, &rfds);
 110                 tv.tv_sec = 30;
 111                 tv.tv_usec = 0;
 112
 113                 ret = select(1, &rfds, NULL, NULL, &tv);
 114                 if( ret == -1 ) {
 115                         perror("select()");
 116                 }
 117                 else if( ret && FD_ISSET(0, &rfds) ) {
 118                         bytes_read = read(0, data.GetBuffer(), data.GetBufSize());
 119                         if( bytes_read == 0 )
 120                                 break;
 121
 122                         if( bytes_read > 0 ) {
 123                                 data.ReleaseBuffer(bytes_read);
 124                                 modem.Write(data);
 125                         }
 126                 }
 127         }
 128 }
 129
 130 int main(int argc, char *argv[])
 131 {
 132         INIT_I18N(PACKAGE);
 133
 134         cout.sync_with_stdio(true);     // leave this on, since libusb uses
 135                                         // stdio for debug messages
 136
 137         try {
 138
 139                 uint32_t pin = 0;
 140                 bool force_serial = false;
 141                 std::string logfile;
 142                 std::string password;
 143
 144                 // check for options via the fifo first, so the command
 145                 // line args can override them
 146                 FifoClient fifo;
 147                 if( fifo.Fetch(4) ) {
 148                         const FifoArgs &args = fifo.GetArgs();
 149                         pin = args.m_pin.Value();
 150                         force_serial = args.m_use_serial_mode;
 151                         logfile = args.m_log_filename;
 152                         password = args.m_password;
 153                         data_dump = args.m_verbose;
 154                 }
 155
 156                 // process command line options
 157                 for(;;) {
 158                         int cmd = getopt(argc, argv, "l:p:P:sv");
 159                         if( cmd == -1 )
 160                                 break;
 161
 162                         switch( cmd )
 163                         {
 164                         case 'l':       // Verbose log file
 165                                 logfile = optarg;
 166                                 break;
 167
 168                         case 'p':       // Blackberry PIN
 169                                 pin = strtoul(optarg, NULL, 16);
 170                                 break;
 171
 172                         case 'P':       // Device password
 173                                 password = optarg;
 174                                 break;
 175
 176                         case 's':       // Use Serial mode
 177                                 force_serial = true;
 178                                 break;
 179
 180                         case 'v':       // data dump on
 181                                 data_dump = true;
 182                                 break;
 183
 184                         case 'h':       // help
 185                         default:
 186                                 Usage();
 187                                 return 0;
 188                         }
 189                 }
 190
 191                 // Initialize the barry library.  Must be called before
 192                 // anything else.
 193                 // Log to stderr, since stdout is for data in this program.
 194                 std::auto_ptr<std::ofstream> log;
 195                 if( logfile.size() ) {
 196                         log.reset( new std::ofstream(logfile.c_str(), ios::app) );
 197                         Barry::Init(data_dump, log.get());
 198                 }
 199                 else {
 200                         Barry::Init(data_dump, &std::cerr);
 201                 }
 202
 203                 // Display version if in data_dump mode
 204                 if( data_dump ) {
 205                         int logical, major, minor;
 206                         const char *Version = Barry::Version(logical, major, minor);
 207                         barryverbose(Version);
 208                 }
 209
 210                 // Probe the USB bus for Blackberry devices and display.
 211                 // If user has specified a PIN, search for it in the
 212                 // available device list here as well
 213                 Barry::Probe probe;
 214                 int activeDevice = probe.FindActive(pin);
 215                 if( activeDevice == -1 ) {
 216                         if( pin )
 217                                 cerr << "PIN " << setbase(16) << pin
 218                                         << " not found" << endl;
 219                         cerr << "No device selected" << endl;
 220                         return 1;
 221                 }
 222
 223                 const ProbeResult &device = probe.Get(activeDevice);
 224
 225                 if( !force_serial && device.HasIpModem() ) {
 226                         barryverbose("Using IpModem mode...");
 227
 228                         // Create our controller object using our threaded router.
 229                         Controller con(probe.Get(activeDevice));
 230
 231                         // Open serial mode... the callback handles reading from
 232                         // USB and writing to stdout
 233                         Mode::IpModem modem(con, SerialDataCallback, 0);
 234                         modem.Open(password.c_str());
 235
 236                         ProcessStdin(modem);
 237                         modem.Close();  // graceful close so we can restart without unplugging
 238                 }
 239                 else {
 240                         if( force_serial ) {
 241                                 barryverbose("Using Serial mode per command line...");
 242                         }
 243                         else {
 244                                 barryverbose("No IpModem mode available, using Serial mode...");
 245                         }
 246
 247                         // Create our socket router and start thread to handle
 248                         // the USB reading, instead of creating our own thread.
 249                         SocketRoutingQueue router;
 250                         router.SpinoffSimpleReadThread();
 251
 252                         // Create our controller object using our threaded router.
 253                         Controller con(probe.Get(activeDevice), router);
 254
 255                         // Open desktop mode... this handles the password side
 256                         // of things
 257                         Mode::Desktop desktop(con);
 258                         desktop.Open(password.c_str());
 259
 260                         // Open serial connection
 261                         Mode::Serial modem(con, SerialDataCallback, 0);
 262                         modem.Open(password.c_str());
 263
 264                         ProcessStdin(modem);
 265                 }
 266
 267                 barryverbose("Exiting");
 268
 269         }
 270         catch( std::exception &e ) {
 271                 cerr << "exception caught in main(): " << e.what() << endl;
 272                 return 1;
 273         }
 274
 275         return 0;
 276 }
 277