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 <errno.h>
  37 #include "i18n.h"
  38
  39 #include "barrygetopt.h"
  40
  41 using namespace std;
  42 using namespace Barry;
  43
  44 bool data_dump = false;
  45 volatile bool signal_end = false;
  46
  47 void Usage()
  48 {
  49    int logical, major, minor;
  50    const char *Version = Barry::Version(logical, major, minor);
  51
  52    cerr
  53    << "pppob - PPP over Barry\n"
  54    << "        Copyright 2007-2012, Net Direct Inc. (http://www.netdirect.ca/)\n"
  55    << "        Using: " << Version << "\n"
  56    << "\n"
  57    << "   -l file   Direct pppob log output to file (useful with -v)\n"
  58    << "   -p pin    PIN of device to talk with\n"
  59    << "             If only one device plugged in, this flag is optional\n"
  60    << "   -P pass   Simplistic method to specify device password\n"
  61    << "   -s        Use Serial mode instead of IpModem\n"
  62    << "   -v        Dump protocol data during operation (debugging only!)\n"
  63    << endl;
  64 }
  65
  66 void signal_handler(int signum)
  67 {
  68         signal_end = true;
  69 }
  70
  71 void SerialDataCallback(void *context, const unsigned char *data, int len)
  72 {
  73         if( len && data_dump )
  74                 barryverbose("ReadThread:\n" << Data(data, len));
  75
  76         while( len ) {
  77                 int written = write(1, data, len);
  78                 if( written > 0 ) {
  79                         len -= written;
  80                         data += written;
  81                 }
  82                 else {
  83                         barryverbose("Error in write()");
  84                 }
  85         }
  86 }
  87
  88 void ProcessStdin(Modem &modem)
  89 {
  90         // Read from stdin and write to USB, until
  91         // stdin is closed
  92         Data data;
  93         int bytes_read;
  94         fd_set rfds;
  95         struct timeval tv;
  96         int ret;
  97
  98         // Handle interrupt signals from pppd
  99         signal_end = false;
 100         signal(SIGINT, &signal_handler);
 101         signal(SIGHUP, &signal_handler);
 102         signal(SIGTERM, &signal_handler);
 103
 104         FD_ZERO(&rfds);
 105         while( signal_end == false ) {
 106                 // Need to use select() here, so that pppd doesn't
 107                 // hang when it tries to set the line discipline
 108                 // on our stdin.
 109
 110                 FD_SET(0, &rfds);
 111                 tv.tv_sec = 30;
 112                 tv.tv_usec = 0;
 113
 114                 ret = select(1, &rfds, NULL, NULL, &tv);
 115                 if( ret == -1 ) {
 116                         perror("select()");
 117                 }
 118                 else if( ret && FD_ISSET(0, &rfds) ) {
 119                         bytes_read = read(0, data.GetBuffer(), data.GetBufSize());
 120                         if( bytes_read == 0 )
 121                                 break;  // end of file
 122                         else if( bytes_read > 0 ) {
 123                                 data.ReleaseBuffer(bytes_read);
 124                                 modem.Write(data);
 125                         }
 126                         else {
 127                                 // read error
 128                                 barryverbose("Read error in ProcessStdin: " << strerror(errno));
 129                                 break;
 130                         }
 131                 }
 132         }
 133 }
 134
 135 int main(int argc, char *argv[])
 136 {
 137         INIT_I18N(PACKAGE);
 138
 139         cout.sync_with_stdio(true);     // leave this on, since libusb uses
 140                                         // stdio for debug messages
 141
 142         try {
 143
 144                 uint32_t pin = 0;
 145                 bool force_serial = false;
 146                 std::string logfile;
 147                 std::string password;
 148
 149                 // check for options via the fifo first, so the command
 150                 // line args can override them
 151                 FifoClient fifo;
 152                 if( fifo.Fetch(4) ) {
 153                         const FifoArgs &args = fifo.GetArgs();
 154                         pin = args.m_pin.Value();
 155                         force_serial = args.m_use_serial_mode;
 156                         logfile = args.m_log_filename;
 157                         password = args.m_password;
 158                         data_dump = args.m_verbose;
 159                 }
 160
 161                 // process command line options
 162                 for(;;) {
 163                         int cmd = getopt(argc, argv, "l:p:P:sv");
 164                         if( cmd == -1 )
 165                                 break;
 166
 167                         switch( cmd )
 168                         {
 169                         case 'l':       // Verbose log file
 170                                 logfile = optarg;
 171                                 break;
 172
 173                         case 'p':       // Blackberry PIN
 174                                 pin = strtoul(optarg, NULL, 16);
 175                                 break;
 176
 177                         case 'P':       // Device password
 178                                 password = optarg;
 179                                 break;
 180
 181                         case 's':       // Use Serial mode
 182                                 force_serial = true;
 183                                 break;
 184
 185                         case 'v':       // data dump on
 186                                 data_dump = true;
 187                                 break;
 188
 189                         case 'h':       // help
 190                         default:
 191                                 Usage();
 192                                 return 0;
 193                         }
 194                 }
 195
 196                 // Initialize the barry library.  Must be called before
 197                 // anything else.
 198                 // Log to stderr, since stdout is for data in this program.
 199                 std::auto_ptr<std::ofstream> log;
 200                 if( logfile.size() ) {
 201                         log.reset( new std::ofstream(logfile.c_str(), ios::app) );
 202                         Barry::Init(data_dump, log.get());
 203                 }
 204                 else {
 205                         Barry::Init(data_dump, &std::cerr);
 206                 }
 207
 208                 // Display version if in data_dump mode
 209                 if( data_dump ) {
 210                         int logical, major, minor;
 211                         const char *Version = Barry::Version(logical, major, minor);
 212                         barryverbose(Version);
 213                 }
 214
 215                 // Probe the USB bus for Blackberry devices and display.
 216                 // If user has specified a PIN, search for it in the
 217                 // available device list here as well
 218                 Barry::Probe probe;
 219                 int activeDevice = probe.FindActive(pin);
 220                 if( activeDevice == -1 ) {
 221                         if( pin )
 222                                 cerr << "PIN " << setbase(16) << pin
 223                                         << " not found" << endl;
 224                         cerr << "No device selected" << endl;
 225                         return 1;
 226                 }
 227
 228                 const ProbeResult &device = probe.Get(activeDevice);
 229
 230                 if( !force_serial && device.HasIpModem() ) {
 231                         barryverbose("Using IpModem mode...");
 232
 233                         // Create our controller object using our threaded router.
 234                         Controller con(probe.Get(activeDevice));
 235
 236                         // Open serial mode... the callback handles reading from
 237                         // USB and writing to stdout
 238                         Mode::IpModem modem(con, SerialDataCallback, 0);
 239                         modem.Open(password.c_str());
 240
 241                         ProcessStdin(modem);
 242                         modem.Close();  // graceful close so we can restart without unplugging
 243                 }
 244                 else {
 245                         if( force_serial ) {
 246                                 barryverbose("Using Serial mode per command line...");
 247                         }
 248                         else {
 249                                 barryverbose("No IpModem mode available, using Serial mode...");
 250                         }
 251
 252                         // Create our socket router and start thread to handle
 253                         // the USB reading, instead of creating our own thread.
 254                         SocketRoutingQueue router;
 255                         router.SpinoffSimpleReadThread();
 256
 257                         // Create our controller object using our threaded router.
 258                         Controller con(probe.Get(activeDevice), router);
 259
 260                         // Open desktop mode... this handles the password side
 261                         // of things
 262                         Mode::Desktop desktop(con);
 263                         desktop.Open(password.c_str());
 264
 265                         // Open serial connection
 266                         Mode::Serial modem(con, SerialDataCallback, 0);
 267                         modem.Open(password.c_str());
 268
 269                         ProcessStdin(modem);
 270                 }
 271
 272                 barryverbose("Exiting");
 273
 274         }
 275         catch( std::exception &e ) {
 276                 cerr << "exception caught in main(): " << e.what() << endl;
 277                 return 1;
 278         }
 279
 280         return 0;
 281 }
 282