src/lib/adapter/AdapterDetection.cpp

   1 /*
   2  * This file is part of the libCEC(R) library.
   3  *
   4  * libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited.  All rights reserved.
   5  * libCEC(R) is an original work, containing original code.
   6  *
   7  * libCEC(R) is a trademark of Pulse-Eight Limited.
   8  *
   9  * This program is dual-licensed; 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.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  *
  24  * Alternatively, you can license this library under a commercial license,
  25  * please contact Pulse-Eight Licensing for more information.
  26  *
  27  * For more information contact:
  28  * Pulse-Eight Licensing       <license@pulse-eight.com>
  29  *     http://www.pulse-eight.com/
  30  *     http://www.pulse-eight.net/
  31  */
  32
  33 #include "AdapterDetection.h"
  34 #include "../platform/os.h"
  35
  36 #if defined(__APPLE__)
  37 #include <dirent.h>
  38 #include <sys/param.h>
  39 #include <IOKit/IOKitLib.h>
  40 #include <IOKit/IOMessage.h>
  41 #include <IOKit/IOCFPlugIn.h>
  42 #include <IOKit/usb/IOUSBLib.h>
  43 #include <IOKit/serial/IOSerialKeys.h>
  44 #include <CoreFoundation/CoreFoundation.h>
  45 #elif defined(__WINDOWS__)
  46 #pragma comment(lib, "advapi32.lib")
  47 #pragma comment(lib, "setupapi.lib")
  48 #include <setupapi.h>
  49
  50 // the virtual COM port only shows up when requesting devices with the raw device guid!
  51 static GUID USB_RAW_GUID =  { 0xA5DCBF10, 0x6530, 0x11D2, { 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED } };
  52 #elif defined(HAVE_LIBUDEV)
  53 #include <dirent.h>
  54 #include <poll.h>
  55 extern "C" {
  56 #include <libudev.h>
  57 }
  58 #endif
  59
  60 #define CEC_VID 0x2548
  61 #define CEC_PID 0x1001
  62
  63 using namespace CEC;
  64 using namespace std;
  65
  66 #if defined(HAVE_LIBUDEV)
  67 bool TranslateComPort(CStdString &strString)
  68 {
  69   CStdString strTmp(strString);
  70   strTmp.MakeReverse();
  71   int iSlash = strTmp.Find('/');
  72   if (iSlash >= 0)
  73   {
  74     strTmp = strTmp.Left(iSlash);
  75     strTmp.MakeReverse();
  76     strString.Format("%s/%s:1.0/tty", strString.c_str(), strTmp.c_str());
  77     return true;
  78   }
  79
  80   return false;
  81 }
  82
  83 bool FindComPort(CStdString &strLocation)
  84 {
  85   CStdString strPort = strLocation;
  86   bool bReturn(!strPort.IsEmpty());
  87   CStdString strConfigLocation(strLocation);
  88   if (TranslateComPort(strConfigLocation))
  89   {
  90     DIR *dir;
  91     struct dirent *dirent;
  92     if((dir = opendir(strConfigLocation.c_str())) == NULL)
  93       return bReturn;
  94
  95     while ((dirent = readdir(dir)) != NULL)
  96     {
  97       if(strcmp((char*)dirent->d_name, "." ) != 0 && strcmp((char*)dirent->d_name, ".." ) != 0)
  98       {
  99         strPort.Format("/dev/%s", dirent->d_name);
 100         if (!strPort.IsEmpty())
 101         {
 102           strLocation = strPort;
 103           bReturn = true;
 104           break;
 105         }
 106       }
 107     }
 108     closedir(dir);
 109   }
 110
 111   return bReturn;
 112 }
 113 #endif
 114
 115 uint8_t CAdapterDetection::FindAdapters(cec_adapter *deviceList, uint8_t iBufSize, const char *strDevicePath /* = NULL */)
 116 {
 117   uint8_t iFound(0);
 118
 119 #if defined(__APPLE__)
 120   kern_return_t kresult;
 121   char bsdPath[MAXPATHLEN] = {0};
 122   io_iterator_t serialPortIterator;
 123
 124   CFMutableDictionaryRef classesToMatch = IOServiceMatching(kIOSerialBSDServiceValue);
 125   if (classesToMatch)
 126   {
 127     CFDictionarySetValue(classesToMatch, CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDModemType));
 128     kresult = IOServiceGetMatchingServices(kIOMasterPortDefault, classesToMatch, &serialPortIterator);
 129     if (kresult == KERN_SUCCESS)
 130     {
 131       io_object_t serialService;
 132       while ((serialService = IOIteratorNext(serialPortIterator)))
 133       {
 134         int iVendor = 0, iProduct = 0;
 135         CFTypeRef       bsdPathAsCFString;
 136
 137         // fetch the device path.
 138         bsdPathAsCFString = IORegistryEntryCreateCFProperty(serialService,
 139           CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
 140         if (bsdPathAsCFString)
 141         {
 142           // convert the path from a CFString to a C (NUL-terminated) string.
 143           CFStringGetCString((CFStringRef)bsdPathAsCFString, bsdPath, MAXPATHLEN - 1, kCFStringEncodingUTF8);
 144           CFRelease(bsdPathAsCFString);
 145
 146           // now walk up the hierarchy until we find the entry with vendor/product IDs
 147           io_registry_entry_t parent;
 148           CFTypeRef vendorIdAsCFNumber  = NULL;
 149           CFTypeRef productIdAsCFNumber = NULL;
 150           kern_return_t kresult = IORegistryEntryGetParentEntry(serialService, kIOServicePlane, &parent);
 151           while (kresult == KERN_SUCCESS)
 152           {
 153             vendorIdAsCFNumber  = IORegistryEntrySearchCFProperty(parent,
 154               kIOServicePlane, CFSTR(kUSBVendorID),  kCFAllocatorDefault, 0);
 155             productIdAsCFNumber = IORegistryEntrySearchCFProperty(parent,
 156               kIOServicePlane, CFSTR(kUSBProductID), kCFAllocatorDefault, 0);
 157             if (vendorIdAsCFNumber && productIdAsCFNumber)
 158             {
 159               CFNumberGetValue((CFNumberRef)vendorIdAsCFNumber, kCFNumberIntType, &iVendor);
 160               CFRelease(vendorIdAsCFNumber);
 161               CFNumberGetValue((CFNumberRef)productIdAsCFNumber, kCFNumberIntType, &iProduct);
 162               CFRelease(productIdAsCFNumber);
 163               IOObjectRelease(parent);
 164               break;
 165             }
 166             io_registry_entry_t oldparent = parent;
 167             kresult = IORegistryEntryGetParentEntry(parent, kIOServicePlane, &parent);
 168             IOObjectRelease(oldparent);
 169           }
 170           if (strlen(bsdPath) && iVendor == CEC_VID && iProduct == CEC_PID)
 171           {
 172             if (!strDevicePath || !strcmp(bsdPath, strDevicePath))
 173             {
 174               // on darwin, the device path is the same as the comm path.
 175               snprintf(deviceList[iFound  ].path, sizeof(deviceList[iFound].path), "%s", bsdPath);
 176               snprintf(deviceList[iFound++].comm, sizeof(deviceList[iFound].path), "%s", bsdPath);
 177             }
 178           }
 179         }
 180               IOObjectRelease(serialService);
 181       }
 182     }
 183     IOObjectRelease(serialPortIterator);
 184   }
 185 #elif defined(HAVE_LIBUDEV)
 186   struct udev *udev;
 187   if (!(udev = udev_new()))
 188     return -1;
 189
 190   struct udev_enumerate *enumerate;
 191   struct udev_list_entry *devices, *dev_list_entry;
 192   struct udev_device *dev, *pdev;
 193   enumerate = udev_enumerate_new(udev);
 194   udev_enumerate_scan_devices(enumerate);
 195   devices = udev_enumerate_get_list_entry(enumerate);
 196   udev_list_entry_foreach(dev_list_entry, devices)
 197   {
 198     const char *strPath;
 199     strPath = udev_list_entry_get_name(dev_list_entry);
 200
 201     dev = udev_device_new_from_syspath(udev, strPath);
 202     if (!dev)
 203       continue;
 204
 205     pdev = udev_device_get_parent(udev_device_get_parent(dev));
 206     if (!pdev || !udev_device_get_sysattr_value(pdev,"idVendor") || !udev_device_get_sysattr_value(pdev, "idProduct"))
 207     {
 208       udev_device_unref(dev);
 209       continue;
 210     }
 211
 212     int iVendor, iProduct;
 213     sscanf(udev_device_get_sysattr_value(pdev, "idVendor"), "%x", &iVendor);
 214     sscanf(udev_device_get_sysattr_value(pdev, "idProduct"), "%x", &iProduct);
 215     if (iVendor == CEC_VID && iProduct == CEC_PID)
 216     {
 217       CStdString strPath(udev_device_get_syspath(pdev));
 218       if (!strDevicePath || !strcmp(strPath.c_str(), strDevicePath))
 219       {
 220         CStdString strComm(strPath);
 221         if (FindComPort(strComm))
 222         {
 223           snprintf(deviceList[iFound  ].path, sizeof(deviceList[iFound].path), "%s", strPath.c_str());
 224           snprintf(deviceList[iFound++].comm, sizeof(deviceList[iFound].path), "%s", strComm.c_str());
 225         }
 226       }
 227     }
 228     udev_device_unref(dev);
 229   }
 230
 231   udev_enumerate_unref(enumerate);
 232   udev_unref(udev);
 233 #elif defined(__WINDOWS__)
 234   HDEVINFO hDevHandle;
 235   DWORD    required = 0, iMemberIndex = 0;
 236   int      nBufferSize = 0;
 237
 238   SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
 239   deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
 240
 241   SP_DEVINFO_DATA devInfoData;
 242   devInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
 243
 244   if ((hDevHandle = SetupDiGetClassDevs(&USB_RAW_GUID, 0, 0, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE)) == INVALID_HANDLE_VALUE)
 245     return iFound;
 246
 247   BOOL bResult = true;
 248   TCHAR *buffer = NULL;
 249   PSP_DEVICE_INTERFACE_DETAIL_DATA devicedetailData;
 250   while(bResult && iFound < iBufSize)
 251   {
 252     bResult = SetupDiEnumDeviceInfo(hDevHandle, iMemberIndex, &devInfoData);
 253
 254     if (bResult)
 255       bResult = SetupDiEnumDeviceInterfaces(hDevHandle, 0, &USB_RAW_GUID, iMemberIndex, &deviceInterfaceData);
 256
 257     if(!bResult)
 258     {
 259       SetupDiDestroyDeviceInfoList(hDevHandle);
 260       delete []buffer;
 261       buffer = NULL;
 262       return iFound;
 263     }
 264
 265     iMemberIndex++;
 266     BOOL bDetailResult = false;
 267     {
 268       // As per MSDN, Get the required buffer size. Call SetupDiGetDeviceInterfaceDetail with a
 269       // NULL DeviceInterfaceDetailData pointer, a DeviceInterfaceDetailDataSize of zero,
 270       // and a valid RequiredSize variable. In response to such a call, this function returns
 271       // the required buffer size at RequiredSize and fails with GetLastError returning
 272       // ERROR_INSUFFICIENT_BUFFER.
 273       // Allocate an appropriately sized buffer and call the function again to get the interface details.
 274
 275       SetupDiGetDeviceInterfaceDetail(hDevHandle, &deviceInterfaceData, NULL, 0, &required, NULL);
 276
 277       buffer = new TCHAR[required];
 278       devicedetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA) buffer;
 279       devicedetailData->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);
 280       nBufferSize = required;
 281     }
 282
 283     bDetailResult = SetupDiGetDeviceInterfaceDetail(hDevHandle, &deviceInterfaceData, devicedetailData, nBufferSize , &required, NULL);
 284     if(!bDetailResult)
 285       continue;
 286
 287     if (strDevicePath && strcmp(strDevicePath, devicedetailData->DevicePath) != 0)
 288       continue;
 289
 290     CStdString strVendorId;
 291     CStdString strProductId;
 292     CStdString strTmp(devicedetailData->DevicePath);
 293     strVendorId.assign(strTmp.substr(strTmp.Find("vid_") + 4, 4));
 294     strProductId.assign(strTmp.substr(strTmp.Find("pid_") + 4, 4));
 295     if (strTmp.Find("&mi_") >= 0 && strTmp.Find("&mi_00") < 0)
 296       continue;
 297
 298     int iVendor, iProduct;
 299     sscanf(strVendorId, "%x", &iVendor);
 300     sscanf(strProductId, "%x", &iProduct);
 301     if (iVendor != CEC_VID || iProduct != CEC_PID)
 302       continue;
 303
 304     HKEY hDeviceKey = SetupDiOpenDevRegKey(hDevHandle, &devInfoData, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_QUERY_VALUE);
 305     if (!hDeviceKey)
 306       continue;
 307
 308     TCHAR strPortName[256];
 309     strPortName[0] = _T('\0');
 310     DWORD dwSize = sizeof(strPortName);
 311     DWORD dwType = 0;
 312
 313     /* search the registry */
 314     if ((RegQueryValueEx(hDeviceKey, _T("PortName"), NULL, &dwType, reinterpret_cast<LPBYTE>(strPortName), &dwSize) == ERROR_SUCCESS) && (dwType == REG_SZ))
 315     {
 316       if (_tcslen(strPortName) > 3 && _tcsnicmp(strPortName, _T("COM"), 3) == 0 &&
 317         _ttoi(&(strPortName[3])) > 0)
 318       {
 319         snprintf(deviceList[iFound  ].path, sizeof(deviceList[iFound].path), "%s", devicedetailData->DevicePath);
 320         snprintf(deviceList[iFound++].comm, sizeof(deviceList[iFound].path), "%s", strPortName);
 321       }
 322     }
 323
 324     RegCloseKey(hDeviceKey);
 325   }
 326 #endif
 327
 328   iBufSize = 0; /* silence "unused" warning on linux/osx */
 329
 330   return iFound;
 331 }