1 /****************************************************************************** 2 * 3 * Copyright 2003-2016 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 file contains interfaces which are internal to AVCTP. 22 * 23 ******************************************************************************/ 24 #ifndef AVCT_INT_H 25 #define AVCT_INT_H 26 27 #include "avct_api.h" 28 #include "avct_defs.h" 29 #include "l2c_api.h" 30 #include "osi/include/fixed_queue.h" 31 #include "stack/include/bt_hdr.h" 32 #include "types/raw_address.h" 33 34 /***************************************************************************** 35 * constants 36 ****************************************************************************/ 37 38 /* lcb state machine events */ 39 enum { 40 AVCT_LCB_UL_BIND_EVT, 41 AVCT_LCB_UL_UNBIND_EVT, 42 AVCT_LCB_UL_MSG_EVT, 43 AVCT_LCB_INT_CLOSE_EVT, 44 AVCT_LCB_LL_OPEN_EVT, 45 AVCT_LCB_LL_CLOSE_EVT, 46 AVCT_LCB_LL_MSG_EVT, 47 AVCT_LCB_LL_CONG_EVT 48 }; 49 50 /* "states" used for L2CAP channel */ 51 #define AVCT_CH_IDLE 0 /* No connection */ 52 #define AVCT_CH_CONN 1 /* Waiting for connection confirm */ 53 #define AVCT_CH_CFG 2 /* Waiting for configuration complete */ 54 #define AVCT_CH_OPEN 3 /* Channel opened */ 55 56 /* "no event" indicator used by ccb dealloc */ 57 #define AVCT_NO_EVT 0xFF 58 59 /***************************************************************************** 60 * data types 61 ****************************************************************************/ 62 /* sub control block type - common data members for tAVCT_LCB and tAVCT_BCB */ 63 typedef struct { 64 uint16_t peer_mtu; /* peer l2c mtu */ 65 uint16_t ch_result; /* L2CAP connection result value */ 66 uint16_t ch_lcid; /* L2CAP channel LCID */ 67 uint8_t allocated; /* 0, not allocated. index+1, otherwise. */ 68 uint8_t state; /* The state machine state */ 69 uint8_t ch_state; /* L2CAP channel state */ 70 } tAVCT_SCB; 71 72 /* link control block type */ 73 typedef struct { 74 uint16_t peer_mtu; /* peer l2c mtu */ 75 uint16_t ch_result; /* L2CAP connection result value */ 76 uint16_t ch_lcid; /* L2CAP channel LCID */ 77 uint8_t allocated; /* 0, not allocated. index+1, otherwise. */ 78 uint8_t state; /* The state machine state */ 79 uint8_t ch_state; /* L2CAP channel state */ 80 BT_HDR* p_rx_msg; /* Message being reassembled */ 81 uint16_t conflict_lcid; /* L2CAP channel LCID */ 82 RawAddress peer_addr; /* BD address of peer */ 83 fixed_queue_t* tx_q; /* Transmit data buffer queue */ 84 bool cong; /* true, if congested */ 85 } tAVCT_LCB; 86 87 /* browse control block type */ 88 typedef struct { 89 uint16_t peer_mtu; /* peer l2c mtu */ 90 uint16_t ch_result; /* L2CAP connection result value */ 91 uint16_t ch_lcid; /* L2CAP channel LCID */ 92 uint8_t allocated; /* 0, not allocated. index+1, otherwise. */ 93 uint8_t state; /* The state machine state */ 94 uint8_t ch_state; /* L2CAP channel state */ 95 BT_HDR* p_tx_msg; /* Message to be sent - in case the browsing channel is not 96 open when MsgReg is called */ 97 uint8_t ch_close; /* CCB index+1, if CCB initiated channel close */ 98 RawAddress peer_addr; /* BD address of peer */ 99 } tAVCT_BCB; 100 101 #define AVCT_ALOC_LCB 0x01 102 #define AVCT_ALOC_BCB 0x02 103 /* connection control block */ 104 typedef struct { 105 tAVCT_CC cc; /* parameters from connection creation */ 106 tAVCT_LCB* p_lcb; /* Associated LCB */ 107 tAVCT_BCB* p_bcb; /* associated BCB */ 108 bool ch_close; /* Whether CCB initiated channel close */ 109 uint8_t allocated; /* Whether LCB/BCB is allocated */ 110 } tAVCT_CCB; 111 112 /* data type associated with UL_MSG_EVT */ 113 typedef struct { 114 BT_HDR* p_buf; 115 tAVCT_CCB* p_ccb; 116 uint8_t label; 117 uint8_t cr; 118 } tAVCT_UL_MSG; 119 120 /* union associated with lcb state machine events */ 121 typedef union { 122 tAVCT_UL_MSG ul_msg; 123 BT_HDR* p_buf; 124 tAVCT_CCB* p_ccb; 125 uint16_t result; 126 bool cong; 127 uint8_t err_code; 128 } tAVCT_LCB_EVT; 129 130 /* Control block for AVCT */ 131 typedef struct { 132 tAVCT_LCB lcb[AVCT_NUM_LINKS]; /* link control blocks */ 133 tAVCT_BCB bcb[AVCT_NUM_LINKS]; /* browse control blocks */ 134 tAVCT_CCB ccb[AVCT_NUM_CONN]; /* connection control blocks */ 135 uint8_t trace_level; /* trace level */ 136 } tAVCT_CB; 137 138 /***************************************************************************** 139 * function declarations 140 ****************************************************************************/ 141 142 /* LCB function declarations */ 143 extern void avct_lcb_event(tAVCT_LCB* p_lcb, uint8_t event, 144 tAVCT_LCB_EVT* p_data); 145 extern void avct_bcb_event(tAVCT_BCB* p_bcb, uint8_t event, 146 tAVCT_LCB_EVT* p_data); 147 extern void avct_close_bcb(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 148 extern tAVCT_LCB* avct_lcb_by_bcb(tAVCT_BCB* p_bcb); 149 extern tAVCT_BCB* avct_bcb_by_lcb(tAVCT_LCB* p_lcb); 150 extern uint8_t avct_bcb_get_last_ccb_index(tAVCT_BCB* p_bcb, 151 tAVCT_CCB* p_ccb_last); 152 extern tAVCT_BCB* avct_bcb_by_lcid(uint16_t lcid); 153 extern tAVCT_LCB* avct_lcb_by_bd(const RawAddress& bd_addr); 154 extern tAVCT_LCB* avct_lcb_alloc(const RawAddress& bd_addr); 155 extern void avct_lcb_dealloc(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 156 extern tAVCT_LCB* avct_lcb_by_lcid(uint16_t lcid); 157 extern tAVCT_CCB* avct_lcb_has_pid(tAVCT_LCB* p_lcb, uint16_t pid); 158 extern bool avct_lcb_last_ccb(tAVCT_LCB* p_lcb, tAVCT_CCB* p_ccb_last); 159 160 /* LCB action functions */ 161 extern void avct_lcb_chnl_open(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 162 extern void avct_lcb_unbind_disc(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 163 extern void avct_lcb_open_ind(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 164 extern void avct_lcb_open_fail(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 165 extern void avct_lcb_close_ind(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 166 extern void avct_lcb_close_cfm(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 167 extern void avct_lcb_bind_conn(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 168 extern void avct_lcb_chk_disc(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 169 extern void avct_lcb_chnl_disc(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 170 extern void avct_lcb_bind_fail(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 171 extern void avct_lcb_cong_ind(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 172 extern void avct_lcb_discard_msg(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 173 extern void avct_lcb_send_msg(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 174 extern void avct_lcb_msg_ind(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 175 extern void avct_lcb_free_msg_ind(tAVCT_LCB* p_lcb, tAVCT_LCB_EVT* p_data); 176 177 /* BCB action functions */ 178 typedef void (*tAVCT_BCB_ACTION)(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 179 extern void avct_bcb_chnl_open(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 180 extern void avct_bcb_unbind_disc(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 181 extern void avct_bcb_open_ind(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 182 extern void avct_bcb_open_fail(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 183 extern void avct_bcb_close_ind(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 184 extern void avct_bcb_close_cfm(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 185 extern void avct_bcb_bind_conn(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 186 extern void avct_bcb_chk_disc(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 187 extern void avct_bcb_chnl_disc(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 188 extern void avct_bcb_bind_fail(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 189 extern void avct_bcb_cong_ind(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 190 extern void avct_bcb_discard_msg(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 191 extern void avct_bcb_send_msg(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 192 extern void avct_bcb_msg_ind(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 193 extern void avct_bcb_free_msg_ind(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 194 195 extern void avct_bcb_dealloc(tAVCT_BCB* p_bcb, tAVCT_LCB_EVT* p_data); 196 197 extern const tAVCT_BCB_ACTION avct_bcb_action[]; 198 extern const uint8_t avct_lcb_pkt_type_len[]; 199 200 /* CCB function declarations */ 201 extern tAVCT_CCB* avct_ccb_alloc(tAVCT_CC* p_cc); 202 extern void avct_ccb_dealloc(tAVCT_CCB* p_ccb, uint8_t event, uint16_t result, 203 const RawAddress* bd_addr); 204 extern uint8_t avct_ccb_to_idx(tAVCT_CCB* p_ccb); 205 extern tAVCT_CCB* avct_ccb_by_idx(uint8_t idx); 206 207 /***************************************************************************** 208 * global data 209 ****************************************************************************/ 210 211 /* Main control block */ 212 extern tAVCT_CB avct_cb; 213 214 /* L2CAP callback registration structure */ 215 extern const tL2CAP_APPL_INFO avct_l2c_appl; 216 extern const tL2CAP_APPL_INFO avct_l2c_br_appl; 217 218 void avct_l2c_disconnect(uint16_t lcid, uint16_t result); 219 void avct_l2c_br_disconnect(uint16_t lcid, uint16_t result); 220 221 constexpr uint16_t kAvrcMtu = 512; 222 constexpr uint16_t kAvrcBrMtu = 1008; 223 224 #endif /* AVCT_INT_H */ 225