1 files changed, 87 insertions, 13 deletions

diff --git a/src/libirecovery.c b/src/libirecovery.c
index 21cdfcf..bcea61c 100644
--- a/src/libirecovery.c
+++ b/src/libirecovery.c
@@ -27,6 +27,21 @@
 #define BUFFER_SIZE 0x1000
 #define debug(...) if(device->debug) fprintf(stderr, __VA_ARGS__)
 
+const char* irecv_error_invalid_input     = "Invalid input";
+const char* irecv_error_unknown           = "Unknown error";
+const char* irecv_error_file_not_found    = "Unable to find file";
+const char* irecv_error_usb_status        = "Invalid device status";
+const char* irecv_error_no_device         = "Unable to find device";
+const char* irecv_error_out_of_memory     = "Unable to allocate memory";
+const char* irecv_error_unable_to_connect = "Unable to connect to device";
+const char* irecv_error_usb_interface     = "Unable to set device interface";
+const char* irecv_error_success           = "Command completed successfully";
+const char* irecv_error_usb_upload        = "Unable to upload data to device";
+const char* irecv_error_usb_configuration = "Unable to set device configuration";
+
+int irecv_default_sender(irecv_device_t* device, unsigned char* data, int size);
+int irecv_default_receiver(irecv_device_t* device, unsigned char* data, int size);
+
 irecv_device_t* irecv_init() {
         struct libusb_context* usb_context = NULL;
 
@@ -36,8 +51,10 @@ irecv_device_t* irecv_init() {
                 return NULL;
         }
         memset(device, '\0', sizeof(irecv_device_t));
-        device->context = usb_context;
 
+        irecv_set_receiver(device, &irecv_default_receiver);
+        irecv_set_sender(device, &irecv_default_sender);
+        device->context = usb_context;
         return device;
 }
 
@@ -112,8 +129,10 @@ irecv_error_t irecv_set_interface(irecv_device_t* device, int interface, int alt
                 return IRECV_ERROR_USB_INTERFACE;
         }
         
-        if(libusb_set_interface_alt_setting(device->handle, interface, alt_interface) < 0) {
-                return IRECV_ERROR_USB_INTERFACE;
+        if(alt_interface > 0) {
+                if(libusb_set_interface_alt_setting(device->handle, interface, alt_interface) < 0) {
+                        return IRECV_ERROR_USB_INTERFACE;
+                }
         }
         
         device->interface = interface;
@@ -170,6 +189,7 @@ irecv_error_t irecv_set_debug(irecv_device_t* device, int level) {
         
         libusb_set_debug(device->context, level);
         device->debug = level;
+        return IRECV_SUCCESS;
 }
 
 irecv_error_t irecv_send_command(irecv_device_t* device, unsigned char* command) {
@@ -177,23 +197,21 @@ irecv_error_t irecv_send_command(irecv_device_t* device, unsigned char* command)
                 return IRECV_ERROR_NO_DEVICE;
         }
 
-        ssize_t length = strlen(command);
+        unsigned int length = strlen(command);
         if(length >= 0x100) {
-                return IRECV_ERROR_INVALID_INPUT;
+                length = 0xFF;
         }
         
         if(device->send_callback != NULL) {
                 // Call our user defined callback first, this must return a number of bytes to send
                 //   or zero to abort send.
                 length = device->send_callback(device, command, length);
-                if(length > 0) {
-                        int ret = libusb_control_transfer(device->handle, 0x40, 0, 0, 0, (unsigned char*) command, length+1, 100);
-                        if(ret < 0) {
-                                return IRECV_ERROR_UNKNOWN;
-                        }
-                }
         }
 
+        if(length > 0) {
+                libusb_control_transfer(device->handle, 0x40, 0, 0, 0, command, length+1, 100);
+        }
+        
         return IRECV_SUCCESS;
 }
 
@@ -299,8 +317,10 @@ irecv_error_t irecv_update(irecv_device_t* device) {
         int bytes = 0;
         while(libusb_bulk_transfer(device->handle, 0x81, buffer, BUFFER_SIZE, &bytes, 100) == 0) {
                 if(bytes > 0) {
-                        if(device->receive_callback(device, buffer, bytes) != bytes) {
-                                return IRECV_ERROR_UNKNOWN;
+                        if(device->receive_callback != NULL) {
+                                if(device->receive_callback(device, buffer, bytes) != bytes) {
+                                        return IRECV_ERROR_UNKNOWN;
+                                }
                         }
                 } else break;
         }
@@ -308,6 +328,18 @@ irecv_error_t irecv_update(irecv_device_t* device) {
         return IRECV_SUCCESS;
 }
 
+int irecv_default_sender(irecv_device_t* device, unsigned char* data, int size) {
+        return size;
+}
+
+int irecv_default_receiver(irecv_device_t* device, unsigned char* data, int size) {
+        int i = 0;
+        for(i = 0; i < size; i++) {
+                printf("%c", data[i]);
+        }
+        return size;
+}
+
 irecv_error_t irecv_set_receiver(irecv_device_t* device, irecv_receive_callback callback) {
         if(device == NULL) {
                 return IRECV_ERROR_NO_DEVICE; 
@@ -325,3 +357,45 @@ irecv_error_t irecv_set_sender(irecv_device_t* device, irecv_send_callback callb
         device->send_callback = callback;
         return IRECV_SUCCESS;
 }
+
+const char* irecv_strerror(irecv_error_t error) {
+        switch(error) {
+        case IRECV_SUCCESS:
+                return irecv_error_success;
+                
+        case IRECV_ERROR_NO_DEVICE:
+                return irecv_error_no_device;
+                
+        case IRECV_ERROR_OUT_OF_MEMORY:
+                return irecv_error_out_of_memory;
+                
+        case IRECV_ERROR_UNABLE_TO_CONNECT:
+                return irecv_error_unable_to_connect;
+                
+        case IRECV_ERROR_INVALID_INPUT:
+                return irecv_error_invalid_input;
+                
+        case IRECV_ERROR_UNKNOWN:
+                return irecv_error_unknown;
+                
+        case IRECV_ERROR_FILE_NOT_FOUND:
+                return irecv_error_file_not_found;
+                
+        case IRECV_ERROR_USB_UPLOAD:
+                return irecv_error_usb_upload;
+                
+        case IRECV_ERROR_USB_STATUS:
+                return irecv_error_usb_status;
+                
+        case IRECV_ERROR_USB_INTERFACE:
+                return irecv_error_usb_interface;
+                
+        case IRECV_ERROR_USB_CONFIGURATION:
+                return irecv_error_usb_configuration;
+                
+        default:
+                return irecv_error_unknown;
+        }
+        
+        return NULL;
+}