src/probe.cc

   1 ///
   2 /// \file       probe.cc
   3 ///             USB Blackberry detection routines
   4 ///
   5
   6 /*
   7     Copyright (C) 2005-2008, 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 "common.h"
  23 #include "probe.h"
  24 #include "usbwrap.h"
  25 #include "data.h"
  26 #include "endian.h"
  27 #include "error.h"
  28 #include "debug.h"
  29 #include "packet.h"
  30 #include "socket.h"
  31 #include "protocol.h"
  32 #include "record-internal.h"
  33 #include "strnlen.h"
  34 #include <iomanip>
  35 #include <errno.h>
  36 #include <string.h>
  37
  38 using namespace Usb;
  39
  40 namespace Barry {
  41
  42 unsigned char Intro_Sends[][32] = {
  43         // packet #1
  44         { 0x00, 0x00, 0x10, 0x00, 0x01, 0xff, 0x00, 0x00,
  45           0xa8, 0x18, 0xda, 0x8d, 0x6c, 0x02, 0x00, 0x00 }
  46 };
  47
  48
  49 unsigned char Intro_Receives[][32] = {
  50         // response to packet #1
  51         { 0x00, 0x00, 0x10, 0x00, 0x02, 0xff, 0x00, 0x00,
  52           0xa8, 0x18, 0xda, 0x8d, 0x6c, 0x02, 0x00, 0x00 }
  53 };
  54
  55 namespace {
  56
  57         unsigned int GetSize(const unsigned char *packet)
  58         {
  59                 uint16_t size = *((uint16_t *)&packet[2]);
  60                 return btohs(size);
  61         }
  62
  63         bool Intro(int IntroIndex, const EndpointPair &ep, Device &dev, Data &response)
  64         {
  65                 dev.BulkWrite(ep.write, Intro_Sends[IntroIndex],
  66                         GetSize(Intro_Sends[IntroIndex]));
  67                 try {
  68                         dev.BulkRead(ep.read, response, 500);
  69                 }
  70                 catch( Usb::Timeout &to ) {
  71                         ddout("BulkRead: " << to.what());
  72                         return false;
  73                 }
  74                 ddout("BulkRead (" << (unsigned int)ep.read << "):\n" << response);
  75                 return true;
  76         }
  77
  78 } // anonymous namespace
  79
  80
  81 bool Probe::CheckSize(const Data &data, unsigned int required)
  82 {
  83         const unsigned char *pd = data.GetData();
  84
  85         if( GetSize(pd) != (unsigned int) data.GetSize() ||
  86             data.GetSize() < required ||
  87             pd[4] != SB_COMMAND_FETCHED_ATTRIBUTE )
  88         {
  89                 dout("Probe: Parse data failure: GetSize(pd): " << GetSize(pd)
  90                         << ", data.GetSize(): " << data.GetSize()
  91                         << ", pd[4]: " << (unsigned int) pd[4]);
  92                 return false;
  93         }
  94
  95         return true;
  96 }
  97
  98 bool Probe::ParsePIN(const Data &data, uint32_t &pin)
  99 {
 100         // validate response data
 101         const unsigned char *pd = data.GetData();
 102
 103         if( !CheckSize(data, 0x14) )
 104                 return false;
 105
 106         // capture the PIN
 107         pin = btohl(*((uint32_t *) &pd[16]));
 108
 109         return true;
 110 }
 111
 112 bool Probe::ParseDesc(const Data &data, std::string &desc)
 113 {
 114         if( !CheckSize(data, 29) )
 115                 return false;
 116
 117         // capture the description
 118         const char *d = (const char*) &data.GetData()[28];
 119         int maxlen = data.GetSize() - 28;
 120         desc.assign(d, strnlen(d, maxlen));
 121
 122         return true;
 123 }
 124
 125 Probe::Probe(const char *busname, const char *devname)
 126         : m_fail_count(0)
 127 {
 128         // let the programmer pass in "" as well as 0
 129         if( busname && !strlen(busname) )
 130                 busname = 0;
 131         if( devname && !strlen(devname) )
 132                 devname = 0;
 133
 134         // Search for standard product ID first
 135         ProbeMatching(VENDOR_RIM, PRODUCT_RIM_BLACKBERRY, busname, devname);
 136
 137         // Search for Pearl devices second
 138         //
 139         // productID 6 devices (PRODUCT_RIM_PEARL) do not expose
 140         // the USB class 255 interface we need, but only the
 141         // Mass Storage one.  Here we search for PRODUCT_RIM_PEARL_DUAL,
 142         // (ID 4) which has both enabled.
 143         ProbeMatching(VENDOR_RIM, PRODUCT_RIM_PEARL_DUAL, busname, devname);
 144         // And a special case, which behaves similar to the PEARL_DUAL,
 145         // but with a unique Product ID.
 146         ProbeMatching(VENDOR_RIM, PRODUCT_RIM_PEARL_8120, busname, devname);
 147 }
 148
 149 void Probe::ProbeMatching(int vendor, int product,
 150                         const char *busname, const char *devname)
 151 {
 152         Usb::DeviceIDType devid;
 153
 154         Match match(vendor, product, busname, devname);
 155         while( match.next_device(&devid) ) try {
 156                 ProbeDevice(devid);
 157         }
 158         catch( Usb::Error &e ) {
 159                 dout("Usb::Error exception caught: " << e.what());
 160                 if( e.libusb_errcode() == -EBUSY ) {
 161                         m_fail_count++;
 162                         m_fail_msgs.push_back(e.what());
 163                 }
 164                 else {
 165                         throw;
 166                 }
 167         }
 168 }
 169
 170 void Probe::ProbeDevice(Usb::DeviceIDType devid)
 171 {
 172         // skip if we can't properly discover device config
 173         DeviceDiscovery discover(devid);
 174         ConfigDesc &config = discover.configs[BLACKBERRY_CONFIGURATION];
 175
 176         // search for interface class
 177         InterfaceDiscovery::base_type::iterator idi = config.interfaces.begin();
 178         for( ; idi != config.interfaces.end(); idi++ ) {
 179                 if( idi->second.desc.bInterfaceClass == BLACKBERRY_DB_CLASS )
 180                         break;
 181         }
 182         if( idi == config.interfaces.end() ) {
 183                 dout("Probe: Interface with BLACKBERRY_DB_CLASS ("
 184                         << BLACKBERRY_DB_CLASS << ") not found.");
 185                 return; // not found
 186         }
 187
 188         unsigned char InterfaceNumber = idi->second.desc.bInterfaceNumber;
 189         dout("Probe: using InterfaceNumber: " << (unsigned int) InterfaceNumber);
 190
 191         // check endpoint validity
 192         EndpointDiscovery &ed = config.interfaces[InterfaceNumber].endpoints;
 193         if( !ed.IsValid() || ed.GetEndpointPairs().size() == 0 ) {
 194                 dout("Probe: endpoint invalid.   ed.IsValud() == "
 195                         << (ed.IsValid() ? "true" : "false")
 196                         << ", ed.GetEndpointPairs().size() == "
 197                         << ed.GetEndpointPairs().size());
 198                 return;
 199         }
 200
 201         ProbeResult result;
 202         result.m_dev = devid;
 203         result.m_interface = InterfaceNumber;
 204         result.m_zeroSocketSequence = 0;
 205
 206         // open device
 207         Device dev(devid);
 208 //      dev.Reset();
 209 //      sleep(5);
 210
 211         //  make sure we're talking to the right config
 212         unsigned char cfg;
 213         if( !dev.GetConfiguration(cfg) )
 214                 throw Usb::Error(dev.GetLastError(),
 215                         "Probe: GetConfiguration failed");
 216         if( cfg != BLACKBERRY_CONFIGURATION ) {
 217                 if( !dev.SetConfiguration(BLACKBERRY_CONFIGURATION) )
 218                         throw Usb::Error(dev.GetLastError(),
 219                                 "Probe: SetConfiguration failed");
 220         }
 221
 222         // open interface
 223         Interface iface(dev, InterfaceNumber);
 224
 225         // find the first bulk read/write endpoint pair that answers
 226         // to our probe commands
 227         // Start with second pair, since evidence indicates the later pairs
 228         // are the ones we need.
 229         size_t i;
 230         for(i = ed.GetEndpointPairs().size() > 1 ? 1 : 0;
 231             i < ed.GetEndpointPairs().size();
 232             i++ )
 233         {
 234                 const EndpointPair &ep = ed.GetEndpointPairs()[i];
 235                 if( ep.type == USB_ENDPOINT_TYPE_BULK ) {
 236
 237                         uint32_t pin;
 238                         uint8_t zeroSocketSequence;
 239                         std::string desc;
 240                         if( ProbePair(dev, ep, pin, desc, zeroSocketSequence) ) {
 241                                 result.m_ep = ep;
 242                                 result.m_pin = pin;
 243                                 result.m_description = desc;
 244                                 result.m_zeroSocketSequence = zeroSocketSequence;
 245                                 break;
 246                         }
 247                 }
 248                 else {
 249                         dout("Probe: Skipping non-bulk endpoint pair (offset: "
 250                                 << i-1 << ") ");
 251                 }
 252         }
 253
 254         // check for ip modem endpoints
 255         i++;
 256         if( i < ed.GetEndpointPairs().size() ) {
 257                 const EndpointPair &ep = ed.GetEndpointPairs()[i];
 258                 if( ProbeModem(dev, ep) ) {
 259                         result.m_epModem = ep;
 260                 }
 261         }
 262
 263         // add to list
 264         if( result.m_ep.IsComplete() ) {
 265                 m_results.push_back(result);
 266                 ddout("Using ReadEndpoint: " << (unsigned int)result.m_ep.read);
 267                 ddout("      WriteEndpoint: " << (unsigned int)result.m_ep.write);
 268         }
 269         else {
 270                 ddout("Unable to discover endpoint pair for one device.");
 271         }
 272 }
 273
 274 bool Probe::ProbePair(Usb::Device &dev,
 275                         const Usb::EndpointPair &ep,
 276                         uint32_t &pin,
 277                         std::string &desc,
 278                         uint8_t &zeroSocketSequence)
 279 {
 280         dev.ClearHalt(ep.read);
 281         dev.ClearHalt(ep.write);
 282
 283         Data data;
 284         dev.BulkDrain(ep.read);
 285         if( !Intro(0, ep, dev, data) ) {
 286                 dout("Probe: Intro(0) failed");
 287                 return false;
 288         }
 289
 290         SocketZero socket(dev, ep.write, ep.read);
 291
 292         Data send, receive;
 293         ZeroPacket packet(send, receive);
 294
 295         // unknown attribute: 0x14 / 0x01
 296         packet.GetAttribute(SB_OBJECT_INITIAL_UNKNOWN,
 297                 SB_ATTR_INITIAL_UNKNOWN);
 298         socket.Send(packet);
 299
 300         // fetch PIN
 301         packet.GetAttribute(SB_OBJECT_PROFILE, SB_ATTR_PROFILE_PIN);
 302         socket.Send(packet);
 303         if( packet.ObjectID() != SB_OBJECT_PROFILE ||
 304             packet.AttributeID() != SB_ATTR_PROFILE_PIN ||
 305             !ParsePIN(receive, pin) )
 306         {
 307                 dout("Probe: unable to fetch PIN");
 308                 return false;
 309         }
 310
 311         // fetch Description
 312         packet.GetAttribute(SB_OBJECT_PROFILE, SB_ATTR_PROFILE_DESC);
 313         socket.Send(packet);
 314         // response ObjectID does not match request... :-/
 315         if( // packet.ObjectID() != SB_OBJECT_PROFILE ||
 316             packet.AttributeID() != SB_ATTR_PROFILE_DESC ||
 317             !ParseDesc(receive, desc) )
 318         {
 319                 dout("Probe: unable to fetch description");
 320         }
 321
 322         // more unknowns:
 323         for( uint16_t attr = 5; attr < 9; attr++ ) {
 324                 packet.GetAttribute(SB_OBJECT_SOCKET_UNKNOWN, attr);
 325                 socket.Send(packet);
 326                 // FIXME parse these responses, if they turn
 327                 // out to be important
 328         }
 329
 330         // all info obtained!
 331         zeroSocketSequence = socket.GetZeroSocketSequence();
 332         return true;
 333 }
 334
 335 // Thanks to Rick Scott (XmBlackBerry:bb_usb.c) for reverse engineering this
 336 bool Probe::ProbeModem(Usb::Device &dev, const Usb::EndpointPair &ep)
 337 {
 338         int num_read;
 339         char data[255];
 340         int local_errno;
 341
 342         num_read = usb_control_msg(dev.GetHandle(),
 343                 /* bmRequestType */ USB_ENDPOINT_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 344                 /* bRequest */ 0xa5,
 345                 /* wValue */ 0,
 346                 /* wIndex */ 1,
 347                 /* data */ data,
 348                 /* wLength */ sizeof(data),
 349                 /* timeout */ 2000);
 350         local_errno = errno;
 351         if( num_read > 1 ) {
 352                 if( data[0] == 0x02 ) {
 353                         return true;
 354                 }
 355         }
 356         return false;
 357 }
 358
 359 int Probe::FindActive(uint32_t pin) const
 360 {
 361         for( int i = 0; i < GetCount(); i++ ) {
 362                 if( Get(i).m_pin == pin )
 363                         return i;
 364         }
 365         if( pin == 0 ) {
 366                 // can we default to a single device?
 367                 if( GetCount() == 1 )
 368                         return 0;       // yes!
 369         }
 370
 371         // PIN not found
 372         return -1;
 373 }
 374
 375 void ProbeResult::DumpAll(std::ostream &os) const
 376 {
 377         os << *this
 378            << ", Interface: 0x" << std::hex << (unsigned int) m_interface
 379            << ", Endpoints: (read: 0x" << std::hex << (unsigned int) m_ep.read
 380                 << ", write: 0x" << std::hex << (unsigned int) m_ep.write
 381                 << ", type: 0x" << std::hex << (unsigned int) m_ep.type
 382            << ", ZeroSocketSequence: 0x" << std::hex << (unsigned int) m_zeroSocketSequence;
 383 }
 384
 385 std::ostream& operator<< (std::ostream &os, const ProbeResult &pr)
 386 {
 387         os << "Device ID: " << pr.m_dev
 388            << std::hex << ". PIN: " << pr.m_pin
 389            << ", Description: " << pr.m_description;
 390         return os;
 391 }
 392
 393 } // namespace Barry
 394