1 /****************************************************************************** 2 * 3 * Copyright 2003-2012 Broadcom Corporation 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 /****************************************************************************** 20 * 21 * This contains constants definitions and other information from the AVCTP 22 * specification. This file is intended for use internal to AVCT only. 23 * 24 ******************************************************************************/ 25 #ifndef AVCT_DEFS_H 26 #define AVCT_DEFS_H 27 28 /***************************************************************************** 29 * constants 30 ****************************************************************************/ 31 32 /* packet type */ 33 #define AVCT_PKT_TYPE_SINGLE 0 /* single packet */ 34 #define AVCT_PKT_TYPE_START 1 /* start packet */ 35 #define AVCT_PKT_TYPE_CONT 2 /* continue packet */ 36 #define AVCT_PKT_TYPE_END 3 /* end packet */ 37 38 /* header lengths for different packet types */ 39 #define AVCT_HDR_LEN_SINGLE 3 40 #define AVCT_HDR_LEN_START 4 41 #define AVCT_HDR_LEN_CONT 1 42 #define AVCT_HDR_LEN_END 1 43 44 /* invalid cr+ipid value */ 45 #define AVCT_CR_IPID_INVALID 1 46 47 /***************************************************************************** 48 * message parsing and building macros 49 ****************************************************************************/ 50 51 #define AVCT_BUILD_HDR(p, label, type, cr_ipid) \ 52 *(p)++ = ((label) << 4) | ((type) << 2) | (cr_ipid); 53 54 #define AVCT_PARSE_HDR(p, label, type, cr_ipid) \ 55 do { \ 56 (label) = *(p) >> 4; \ 57 (type) = (*(p) >> 2) & 3; \ 58 (cr_ipid) = *(p)++ & 3; \ 59 } while (0) 60 61 #define AVCT_PKT_TYPE(p) ((*(p) >> 2) & 3) 62 63 #endif /* AVCT_DEFS_H */ 64
