ajouts claim interface

achemin1
1 parent 6fbb050a
Showing 3 changed files with 91 additions and 2 deletions Show diff stats
include/libusb_wrapper.h
src/libusb_wrapper.c
src/main.c
@@ -7,9 +7,11 @@
 #include <stdbool.h>
  
 void usbinit(libusb_context** context_ptr);
-
 void usbclose(libusb_context* context);
  
+void interfaceclaim(libusb_device_handle *handle, struct libusb_interface *interface);
+void interfaceclose(libusb_device_handle *handle, struct libusb_interface *interface);
+
 ssize_t getListDevices(libusb_context* context, libusb_device***list_ptr);
 void getFromKernel(libusb_device_handle *handle, int interface);
  
@@ -19,6 +21,11 @@ void displayDevicesMore(libusb_context *context);
  
 void getFirstDeviceFromID(libusb_context *context, int vid, int pid, libusb_device **device);
  
+void getOurInterfaces(libusb_device *device,
+                      struct libusb_interface **int_hidjoy,
+                      struct libusb_interface **int_leds,
+                      struct libusb_interface **int_vibrators
+);
  
 void displayDeviceEndpoints ();
  
@@ -15,6 +15,18 @@ void usbclose(libusb_context *context) {
     libusb_exit(context);
 }
  
+void interfaceclaim(libusb_device_handle *handle, struct libusb_interface *interface){
+    const struct libusb_interface_descriptor * interface_desc = &interface->altsetting[0]; //TODO enlever cette ligne, refactor
+    int status=libusb_claim_interface(handle, interface_desc->bInterfaceNumber);
+    if(status!=0){ perror("libusb_claim_interface"); exit(-1); }
+}
+
+void interfaceclose(libusb_device_handle *handle, struct libusb_interface *interface){
+    const struct libusb_interface_descriptor * interface_desc = &interface->altsetting[0];
+    int status = libusb_release_interface(handle, interface_desc->bInterfaceNumber);
+    if(status!=0){ perror("libusb_release_interface"); exit(-1); }
+}
+
 // Si le méchant noyau est passé avant vous :
 void getFromKernel(libusb_device_handle *handle, int interface) { //private method for now
     if (libusb_kernel_driver_active(handle, interface)) {
@@ -196,7 +208,6 @@ void displayDeviceEndpoints(libusb_device_handle* handle) {
                     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");
-
             }
         }
  
@@ -228,3 +239,47 @@ void displayDeviceEndpoints(libusb_device_handle* handle) {
     libusb_close(handle);
  
 }
+
+void getOurInterfaces(libusb_device *device,
+                      struct libusb_interface **int_hidjoy,
+                      struct libusb_interface **int_leds,
+                      struct libusb_interface **int_vibrators
+) {
+    //REDONDANCE DE CODE AVEC displayDeviceEndpoints
+
+    // 4.2 configuration du périph usb
+    struct libusb_config_descriptor *config;
+    int statusFetchConfig = libusb_get_active_config_descriptor(device, &config);
+    if (statusFetchConfig != LIBUSB_SUCCESS) {
+        perror("libusb_get_active_config_descriptor");
+        return;
+    }
+
+    //caractéristiques globales
+    printf("Config.bConfigurationValue : %d\n", config->bConfigurationValue);
+    printf("Config/ bLength:%d\nbDescriptorType:%d\nbNumInterfaces:%d\n",
+           config->bLength, config->bDescriptorType, config->bNumInterfaces);
+
+
+    //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);
+
+        struct libusb_interface * interface = &config->interface[indexInterface];
+
+        //todo use le descriptor pour avoir bInterfaceNumber?
+        if(indexInterface==0){
+            *int_hidjoy = interface;
+        }else if(indexInterface==1){
+            *int_leds = interface;
+        }else if(indexInterface==2){
+            *int_vibrators = interface;
+        }
+
+        //#define pour les indices correspondants aux interfaces
+        //variables globales
+    }
+
+}
 \ No newline at end of file
@@ -64,7 +64,34 @@ int main(int argc, char *argv[]){
             return 1;
         }
  
+        //take the handle
+        libusb_device_handle *device_handle = NULL;
+        if(libusb_open(device, &device_handle) != 0){
+            printf("Error : cannot handle the device\n");
+            return 1;
+        }
+
         //Take the interfaces
+        printf("Search for interfaces\n");
+        struct libusb_interface * int_hidjoy = NULL;
+        struct libusb_interface * int_leds = NULL;
+        struct libusb_interface * int_vibrators = NULL;
+        getOurInterfaces(device, &int_hidjoy, &int_leds, &int_vibrators);
+
+        //Claim interface
+        printf("Claim interfaces ...\n");
+        printf("-Leds\n");
+        interfaceclaim(device_handle, int_leds);
+        printf("-Vibrators\n");
+        interfaceclaim(device_handle, int_vibrators);
+
+        //Close
+        printf("Unclaim interfaces ...\n");
+        //printf("-HID Joy\n"); //would not work
+        //interfaceclose(device, ...)
+        printf("-Leds\n");
+        interfaceclose(device_handle, int_leds);
+        interfaceclose(device_handle, int_vibrators);
  
  
         printf("Finished\n");