1 /* Copyright (C) 2010 The Android Open Source Project 2 ** 3 ** This software is licensed under the terms of the GNU General Public 4 ** License version 2, as published by the Free Software Foundation, and 5 ** may be copied, distributed, and modified under those terms. 6 ** 7 ** This program is distributed in the hope that it will be useful, 8 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 9 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 ** GNU General Public License for more details. 11 */ 12 13 #ifndef _ANDROID_PROTOCOL_UI_COMMON_H 14 #define _ANDROID_PROTOCOL_UI_COMMON_H 15 16 /* 17 * Contains declarations for UI control protocol used by both the Core, 18 * and the UI. 19 */ 20 21 /* UI control command header. 22 * Every UI control command sent by the Core, or by the UI begins with this 23 * header, immediately followed by the command parameters (if there are any). 24 * Command type is defined by cmd_type field of this header. If command doesn't 25 * have any command-specific parameters, cmd_param_size field of this header 26 * must be 0. 27 */ 28 typedef struct UICmdHeader { 29 /* Command type. */ 30 uint8_t cmd_type; 31 32 /* Byte size of the buffer containing parameters for the comand defined by 33 * the cmd_type field. The buffer containing parameters must immediately 34 * follow this header. If command doesn't have any parameters, this field 35 * must be 0 */ 36 uint32_t cmd_param_size; 37 } UICmdHeader; 38 39 /* UI control command response header. 40 * If UI control command assumes a response from the remote end, the response 41 * must start with this header, immediately followed by the response data buffer. 42 */ 43 typedef struct UICmdRespHeader { 44 /* Result of the command handling. */ 45 int result; 46 47 /* Byte size of the buffer containing response data immediately following 48 * this header. If there are no response data for the command, this field 49 * must be 0. */ 50 uint32_t resp_data_size; 51 } UICmdRespHeader; 52 53 #endif /* _ANDROID_PROTOCOL_UI_COMMON_H */ 54