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) 2007-2010, 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 <getopt.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
  39 using namespace std;
  40 using namespace Barry;
  41
  42 bool data_dump = false;
  43 volatile bool signal_end = false;
  44
  45 void Usage()
  46 {
  47    int major, minor;
  48    const char *Version = Barry::Version(major, minor);
  49
  50    cerr
  51    << "pppob - PPP over Barry\n"
  52    << "        Copyright 2007-2010, Net Direct Inc. (http://www.netdirect.ca/)\n"
  53    << "        Using: " << Version << "\n"
  54    << "\n"
  55    << "   -l file   Direct pppob log output to file (useful with -v)\n"
  56    << "   -p pin    PIN of device to talk with\n"
  57    << "             If only one device plugged in, this flag is optional\n"
  58    << "   -P pass   Simplistic method to specify device password\n"
  59    << "   -s        Use Serial mode instead of IpModem\n"
  60    << "   -v        Dump protocol data during operation (debugging only!)\n"
  61    << endl;
  62 }
  63
  64 void signal_handler(int signum)
  65 {
  66         signal_end = true;
  67 }
  68
  69 void SerialDataCallback(void *context, const unsigned char *data, int len)
  70 {
  71         if( len && data_dump )
  72                 barryverbose("ReadThread:\n" << Data(data, len));
  73
  74         while( len ) {
  75                 int written = write(1, data, len);
  76                 if( written > 0 ) {
  77                         len -= written;
  78                         data += written;
  79                 }
  80                 else {
  81                         barryverbose("Error in write()");
  82                 }
  83         }
  84 }
  85
  86 void ProcessStdin(Modem &modem)
  87 {
  88         // Read from stdin and write to USB, until
  89         // stdin is closed
  90         Data data;
  91         int bytes_read;
  92         fd_set rfds;
  93         struct timeval tv;
  94         int ret;
  95
  96         // Handle interrupt signals from pppd
  97         signal_end = false;
  98         signal(SIGINT, &signal_handler);
  99         signal(SIGHUP, &signal_handler);
 100         signal(SIGTERM, &signal_handler);
 101
 102         FD_ZERO(&rfds);
 103         while( signal_end == false ) {
 104                 // Need to use select() here, so that pppd doesn't
 105                 // hang when it tries to set the line discipline
 106                 // on our stdin.
 107
 108                 FD_SET(0, &rfds);
 109                 tv.tv_sec = 30;
 110                 tv.tv_usec = 0;
 111
 112                 ret = select(1, &rfds, NULL, NULL, &tv);
 113                 if( ret == -1 ) {
 114                         perror("select()");
 115                 }
 116                 else if( ret && FD_ISSET(0, &rfds) ) {
 117                         bytes_read = read(0, data.GetBuffer(), data.GetBufSize());
 118                         if( bytes_read == 0 )
 119                                 break;
 120
 121                         if( bytes_read > 0 ) {
 122                                 data.ReleaseBuffer(bytes_read);
 123                                 modem.Write(data);
 124                         }
 125                 }
 126         }
 127 }
 128
 129 int main(int argc, char *argv[])
 130 {
 131         INIT_I18N(PACKAGE);
 132
 133         cout.sync_with_stdio(true);     // leave this on, since libusb uses
 134                                         // stdio for debug messages
 135
 136         try {
 137
 138                 uint32_t pin = 0;
 139                 bool force_serial = false;
 140                 std::string logfile;
 141                 std::string password;
 142
 143                 // process command line options
 144                 for(;;) {
 145                         int cmd = getopt(argc, argv, "l:p:P:sv");
 146                         if( cmd == -1 )
 147                                 break;
 148
 149                         switch( cmd )
 150                         {
 151                         case 'l':       // Verbose log file
 152                                 logfile = optarg;
 153                                 break;
 154
 155                         case 'p':       // Blackberry PIN
 156                                 pin = strtoul(optarg, NULL, 16);
 157                                 break;
 158
 159                         case 'P':       // Device password
 160                                 password = optarg;
 161                                 break;
 162
 163                         case 's':       // Use Serial mode
 164                                 force_serial = true;
 165                                 break;
 166
 167                         case 'v':       // data dump on
 168                                 data_dump = true;
 169                                 break;
 170
 171                         case 'h':       // help
 172                         default:
 173                                 Usage();
 174                                 return 0;
 175                         }
 176                 }
 177
 178                 // Initialize the barry library.  Must be called before
 179                 // anything else.
 180                 // Log to stderr, since stdout is for data in this program.
 181                 std::auto_ptr<std::ofstream> log;
 182                 if( logfile.size() ) {
 183                         log.reset( new std::ofstream(logfile.c_str(), ios::app) );
 184                         Barry::Init(data_dump, log.get());
 185                 }
 186                 else {
 187                         Barry::Init(data_dump, &std::cerr);
 188                 }
 189
 190                 // Display version if in data_dump mode
 191                 if( data_dump ) {
 192                         int major, minor;
 193                         const char *Version = Barry::Version(major, minor);
 194                         barryverbose(Version);
 195                 }
 196
 197                 // Probe the USB bus for Blackberry devices and display.
 198                 // If user has specified a PIN, search for it in the
 199                 // available device list here as well
 200                 Barry::Probe probe;
 201                 int activeDevice = probe.FindActive(pin);
 202                 if( activeDevice == -1 ) {
 203                         if( pin )
 204                                 cerr << "PIN " << setbase(16) << pin
 205                                         << " not found" << endl;
 206                         cerr << "No device selected" << endl;
 207                         return 1;
 208                 }
 209
 210                 const ProbeResult &device = probe.Get(activeDevice);
 211
 212                 if( !force_serial && device.HasIpModem() ) {
 213                         barryverbose("Using IpModem mode...");
 214
 215                         // Create our controller object using our threaded router.
 216                         Controller con(probe.Get(activeDevice));
 217
 218                         // Open serial mode... the callback handles reading from
 219                         // USB and writing to stdout
 220                         Mode::IpModem modem(con, SerialDataCallback, 0);
 221                         modem.Open(password.c_str());
 222
 223                         ProcessStdin(modem);
 224                         modem.Close();  // graceful close so we can restart without unplugging
 225                 }
 226                 else {
 227                         if( force_serial ) {
 228                                 barryverbose("Using Serial mode per command line...");
 229                         }
 230                         else {
 231                                 barryverbose("No IpModem mode available, using Serial mode...");
 232                         }
 233
 234                         // Create our socket router and start thread to handle
 235                         // the USB reading, instead of creating our own thread.
 236                         SocketRoutingQueue router;
 237                         router.SpinoffSimpleReadThread();
 238
 239                         // Create our controller object using our threaded router.
 240                         Controller con(probe.Get(activeDevice), router);
 241
 242                         // Open desktop mode... this handles the password side
 243                         // of things
 244                         Mode::Desktop desktop(con);
 245                         desktop.Open(password.c_str());
 246
 247                         // Open serial connection
 248                         Mode::Serial modem(con, SerialDataCallback, 0);
 249                         modem.Open(password.c_str());
 250
 251                         ProcessStdin(modem);
 252                 }
 253
 254                 barryverbose("Exiting");
 255
 256         }
 257         catch( std::exception &e ) {
 258                 cerr << "exception caught in main(): " << e.what() << endl;
 259                 return 1;
 260         }
 261
 262         return 0;
 263 }
 264