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#include "libusb_wrapper.h"
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void usbinit(libusb_context **context_ptr) {
//libusb_context *context;
int statusInit = libusb_init(context_ptr);
if (statusInit != LIBUSB_SUCCESS) {
perror("libusb_init");
exit(-1);
}
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}
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void usbclose(libusb_context *context) {
libusb_exit(context);
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}
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// Si le méchant noyau est passé avant vous :
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void getFromKernel(libusb_device_handle *handle, int interface) { //private method for now
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if (libusb_kernel_driver_active(handle, interface)) {
int statusKDriver = libusb_detach_kernel_driver(handle, interface);
if (statusKDriver != LIBUSB_SUCCESS) {
perror("libusb_detach_kernel_driver");
exit(-1);
}
}
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}
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ssize_t getListDevices(libusb_context *context, libusb_device ***list_ptr) {
ssize_t count = libusb_get_device_list(context, list_ptr);
if (count < 0) {
perror("libusb_get_device_list");
exit(-1);
}
return count;
}
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void* _enumerateDevices(libusb_context *context, void (*func)(libusb_device *device)){
libusb_device **list;
ssize_t count = getListDevices(context, &list);
ssize_t i = 0;
for (i = 0; i < count; i++) {
libusb_device *device = list[i];
func(device);
}
libusb_free_device_list(list, 1);
return NULL; //DBGONLY TEMP
}
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//print readable string, not asked for tutoring
void _printConfig(libusb_device *device) {//private method
// Ouverture du périphérique
libusb_device_handle *handle;
int statusDevice = libusb_open(device, &handle);
if (statusDevice != LIBUSB_SUCCESS) {
perror("libusb_open");
//return; //exit(-1);
}
int MAXLEN_DESCRIPTOR_STRING = 200;
uint8_t desc_idx = 2;
//uint16_t langid = 16;
unsigned char data[200];
// TEST 16
for (desc_idx = 0; desc_idx < 16; desc_idx++) {
int statusAscii = libusb_get_string_descriptor_ascii(
handle, desc_idx, data, MAXLEN_DESCRIPTOR_STRING);
if (statusAscii == -9) // TEST seems to be LIBUSB_ERROR
break;
printf(" - Descriptor string : %s ; %i\n", data, statusAscii);
}
libusb_close(handle);
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}
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void _displayOneDevice(libusb_device *device){
struct libusb_device_descriptor desc;
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int status = libusb_get_device_descriptor(device, &desc);
if (status != LIBUSB_SUCCESS){
printf("Cannot get device desc : %s\n", libusb_error_name(status)); //DBGONLY
perror("libusb_open");
return;
}
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uint8_t bus = libusb_get_bus_number(device);
uint8_t address = libusb_get_device_address(device);
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printf("Device Found @ (Bus:Address) %d:%d\n", bus, address);
printf("Vendor ID 0x0%x\n", desc.idVendor);
printf("Product ID 0x0%x\n", desc.idProduct);
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//displayDeviceEndpoints(device); //Not really work on Axel@Alptop
}
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void displayDevices(libusb_context *context) {
_enumerateDevices(context, _displayOneDevice);
}
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void _displayOneDeviceMore(libusb_device *device){
_displayOneDevice(device);
_printConfig(device);
}
void displayDevicesMore(libusb_context *context) {
_enumerateDevices(context, _displayOneDeviceMore);
}
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//get device from iteration (and not from not recommanded function :
//ugly using global vars ?? Cannot communicate between getFirstDeviceFromID and _getFirstDeviceFromID
int g_vid;
int g_pid;
libusb_device *g_device = NULL;
void _getFirstDeviceFromID(libusb_device *device) {
struct libusb_device_descriptor desc;
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int status = libusb_get_device_descriptor(device, &desc);
if (status != LIBUSB_SUCCESS){
printf("Cannot get device desc : %s\n", libusb_error_name(status)); //DBGONLY
perror("libusb_open");
return;
}
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if(desc.idVendor == g_vid && desc.idProduct == g_pid){
g_device = device;
}
}
void getFirstDeviceFromID(libusb_context *context, int vid, int pid, libusb_device **device) {
g_vid = vid; //pass parameters for enumeration
g_pid = pid; //idem
_enumerateDevices(context, _getFirstDeviceFromID);
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*device = g_device; //get return from enumeration
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}
//void getDevicesFromID(vid, pid) //return array
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void displayDeviceEndpoints(libusb_device_handle* handle) {
//recover pointer from handle
libusb_device *device;
device = libusb_get_device(handle);
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// lectures des configs => on prend la première configuration pour l'instant
/*int configuration = 0; // valueof("bConfigurationValue");
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int statusConfig = libusb_set_configuration(handle, configuration);
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if (statusConfig != LIBUSB_SUCCESS) {
perror("libusb_set_configuration");
return;
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}*/
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// 4.2 configuration du périph usb
struct libusb_config_descriptor *config;
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int statusFetchConfig = libusb_get_active_config_descriptor(device, &config);
if (statusFetchConfig != LIBUSB_SUCCESS) {
perror("libusb_get_active_config_descriptor");
return;
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}
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//caractéristiques globales
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printf("Config.bConfigurationValue : %d\n", config->bConfigurationValue);
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printf("Config/ bLength:%d\nbDescriptorType:%d\nbNumInterfaces:%d\n",
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config->bLength, config->bDescriptorType, config->bNumInterfaces);
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//itération des interfaces
printf("Itération de l'interface\n");
for (int indexInterface = 0; indexInterface < config->bNumInterfaces; indexInterface++) {
printf("-indexInterface=%d\n", indexInterface);
printf("-Altsetting=%d\n", config->interface[indexInterface].num_altsetting);
const struct libusb_interface * interface = &config->interface[indexInterface];
//if 1 setting (or more)
if(interface->num_altsetting != 0) {
const struct libusb_interface_descriptor * interface_desc = &interface->altsetting[0];
printf("--bNumEndpoints=%d\n", interface_desc->bNumEndpoints);
printf("--bDescriptorType=%d\n", interface_desc->bDescriptorType);
for(int indexEndpoints = 0; indexEndpoints < interface_desc->bNumEndpoints ; indexEndpoints++){
const struct libusb_endpoint_descriptor * endpoint_desc = &interface_desc->endpoint[indexEndpoints];
printf("---bDescriptorType=%d\n", endpoint_desc->bDescriptorType);
printf("---bEndpointAddress=%d\n", endpoint_desc->bEndpointAddress);
if(endpoint_desc->extra != NULL)
printf("---extra: %s\n", endpoint_desc->extra);
if(endpoint_desc->bmAttributes == LIBUSB_TRANSFER_TYPE_INTERRUPT)//TODO AJOUT MASQUE ? (voir doc)
printf("---is of type INTERRUPT\n");
}
}
//Affichez l’indice et le numéro de chaque interface détectée et réclamée. Affichez aussi les points d’accès trouvés en précisant ceux sauvés.
/*
//int interface=valueof("bInterfaceNumber");
int status=libusb_claim_interface(handle,interface->bInterfaceNumber);
if(status!=0){ perror("libusb_claim_interface"); exit(-1); }
status=libusb_release_interface(handle,interface->bInterfaceNumber);
if(status!=0){ perror("libusb_release_interface"); exit(-1); }
//claim_interface(.., config interface altsetting bInterfaceNumber
//config interface altsetting endpoint bmAttributes == LIBUSB_TRANSFER_TYPE_INTERRUPT
//add des enpoint unint8_t*/
//DESCRIPTOR.C /.H :décommenter
//IL FAUT RELEASE UNIQUEMENT LES INTERFACES QUI NE SONT PAS DES HID
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}
printf("\n");
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libusb_close(handle);
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}
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