1 /****************************************************************************** 2 * 3 * Copyright 1999-2012 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 file contains L2CAP internal definitions 22 * 23 ******************************************************************************/ 24 #ifndef L2C_INT_H 25 #define L2C_INT_H 26 27 #include <stdbool.h> 28 29 #include "bt_common.h" 30 #include "btm_api.h" 31 #include "l2c_api.h" 32 #include "l2cdefs.h" 33 #include "osi/include/alarm.h" 34 #include "osi/include/fixed_queue.h" 35 #include "osi/include/list.h" 36 37 #define L2CAP_MIN_MTU 48 /* Minimum acceptable MTU is 48 bytes */ 38 39 /* LE credit based L2CAP connection parameters */ 40 constexpr uint16_t L2CAP_LE_MIN_MTU = 23; // Minimum SDU size 41 constexpr uint16_t L2CAP_LE_MIN_MPS = 23; 42 constexpr uint16_t L2CAP_LE_MAX_MPS = 65533; 43 constexpr uint16_t L2CAP_LE_CREDIT_MAX = 65535; 44 45 // This is initial amout of credits we send, and amount to which we increase 46 // credits once they fall below threshold 47 constexpr uint16_t L2CAP_LE_CREDIT_DEFAULT = 0xffff; 48 49 // If credit count on remote fall below this value, we send back credits to 50 // reach default value. 51 constexpr uint16_t L2CAP_LE_CREDIT_THRESHOLD = 0x0040; 52 53 static_assert(L2CAP_LE_CREDIT_THRESHOLD < L2CAP_LE_CREDIT_DEFAULT, 54 "Threshold must be smaller then default credits"); 55 56 /* 57 * Timeout values (in milliseconds). 58 */ 59 #define L2CAP_LINK_ROLE_SWITCH_TIMEOUT_MS (10 * 1000) /* 10 seconds */ 60 #define L2CAP_LINK_CONNECT_TIMEOUT_MS (60 * 1000) /* 30 seconds */ 61 #define L2CAP_LINK_CONNECT_EXT_TIMEOUT_MS (120 * 1000) /* 120 seconds */ 62 #define L2CAP_ECHO_RSP_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 63 #define L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS (2 * 1000) /* 2 seconds */ 64 #define L2CAP_LINK_DISCONNECT_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 65 #define L2CAP_CHNL_CONNECT_TIMEOUT_MS (60 * 1000) /* 60 seconds */ 66 #define L2CAP_CHNL_CONNECT_EXT_TIMEOUT_MS (120 * 1000) /* 120 seconds */ 67 #define L2CAP_CHNL_CFG_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 68 #define L2CAP_CHNL_DISCONNECT_TIMEOUT_MS (10 * 1000) /* 10 seconds */ 69 #define L2CAP_DELAY_CHECK_SM4_TIMEOUT_MS (2 * 1000) /* 2 seconds */ 70 #define L2CAP_WAIT_INFO_RSP_TIMEOUT_MS (3 * 1000) /* 3 seconds */ 71 #define L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 72 #define L2CAP_FCR_ACK_TIMEOUT_MS 200 /* 200 milliseconds */ 73 74 /* Define the possible L2CAP channel states. The names of 75 * the states may seem a bit strange, but they are taken from 76 * the Bluetooth specification. 77 */ 78 typedef enum { 79 CST_CLOSED, /* Channel is in closed state */ 80 CST_ORIG_W4_SEC_COMP, /* Originator waits security clearence */ 81 CST_TERM_W4_SEC_COMP, /* Acceptor waits security clearence */ 82 CST_W4_L2CAP_CONNECT_RSP, /* Waiting for peer conenct response */ 83 CST_W4_L2CA_CONNECT_RSP, /* Waiting for upper layer connect rsp */ 84 CST_CONFIG, /* Negotiating configuration */ 85 CST_OPEN, /* Data transfer state */ 86 CST_W4_L2CAP_DISCONNECT_RSP, /* Waiting for peer disconnect rsp */ 87 CST_W4_L2CA_DISCONNECT_RSP /* Waiting for upper layer disc rsp */ 88 } tL2C_CHNL_STATE; 89 90 /* Define the possible L2CAP link states 91 */ 92 typedef enum { 93 LST_DISCONNECTED, 94 LST_CONNECT_HOLDING, 95 LST_CONNECTING_WAIT_SWITCH, 96 LST_CONNECTING, 97 LST_CONNECTED, 98 LST_DISCONNECTING 99 } tL2C_LINK_STATE; 100 101 /* Define input events to the L2CAP link and channel state machines. The names 102 * of the events may seem a bit strange, but they are taken from 103 * the Bluetooth specification. 104 */ 105 /* Lower layer */ 106 #define L2CEVT_LP_CONNECT_CFM 0 /* connect confirm */ 107 #define L2CEVT_LP_CONNECT_CFM_NEG 1 /* connect confirm (failed) */ 108 #define L2CEVT_LP_CONNECT_IND 2 /* connect indication */ 109 #define L2CEVT_LP_DISCONNECT_IND 3 /* disconnect indication */ 110 #define L2CEVT_LP_QOS_CFM 4 /* QOS confirmation */ 111 #define L2CEVT_LP_QOS_CFM_NEG 5 /* QOS confirmation (failed)*/ 112 #define L2CEVT_LP_QOS_VIOLATION_IND 6 /* QOS violation indication */ 113 114 /* Security */ 115 #define L2CEVT_SEC_COMP 7 /* cleared successfully */ 116 #define L2CEVT_SEC_COMP_NEG 8 /* procedure failed */ 117 118 /* Peer connection */ 119 #define L2CEVT_L2CAP_CONNECT_REQ 10 /* request */ 120 #define L2CEVT_L2CAP_CONNECT_RSP 11 /* response */ 121 #define L2CEVT_L2CAP_CONNECT_RSP_PND 12 /* response pending */ 122 #define L2CEVT_L2CAP_CONNECT_RSP_NEG 13 /* response (failed) */ 123 124 /* Peer configuration */ 125 #define L2CEVT_L2CAP_CONFIG_REQ 14 /* request */ 126 #define L2CEVT_L2CAP_CONFIG_RSP 15 /* response */ 127 #define L2CEVT_L2CAP_CONFIG_RSP_NEG 16 /* response (failed) */ 128 129 #define L2CEVT_L2CAP_DISCONNECT_REQ 17 /* Peer disconnect request */ 130 #define L2CEVT_L2CAP_DISCONNECT_RSP 18 /* Peer disconnect response */ 131 #define L2CEVT_L2CAP_INFO_RSP 19 /* Peer information response */ 132 #define L2CEVT_L2CAP_DATA 20 /* Peer data */ 133 134 /* Upper layer */ 135 #define L2CEVT_L2CA_CONNECT_REQ 21 /* connect request */ 136 #define L2CEVT_L2CA_CONNECT_RSP 22 /* connect response */ 137 #define L2CEVT_L2CA_CONNECT_RSP_NEG 23 /* connect response (failed)*/ 138 #define L2CEVT_L2CA_CONFIG_REQ 24 /* config request */ 139 #define L2CEVT_L2CA_CONFIG_RSP 25 /* config response */ 140 #define L2CEVT_L2CA_CONFIG_RSP_NEG 26 /* config response (failed) */ 141 #define L2CEVT_L2CA_DISCONNECT_REQ 27 /* disconnect request */ 142 #define L2CEVT_L2CA_DISCONNECT_RSP 28 /* disconnect response */ 143 #define L2CEVT_L2CA_DATA_READ 29 /* data read */ 144 #define L2CEVT_L2CA_DATA_WRITE 30 /* data write */ 145 #define L2CEVT_L2CA_FLUSH_REQ 31 /* flush */ 146 147 #define L2CEVT_TIMEOUT 32 /* Timeout */ 148 #define L2CEVT_SEC_RE_SEND_CMD 33 /* btm_sec has enough info to proceed */ 149 150 #define L2CEVT_ACK_TIMEOUT 34 /* RR delay timeout */ 151 152 #define L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT \ 153 35 /* Upper layer credit packet \ 154 */ 155 #define L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT 36 /* Peer credit packet */ 156 157 /* Constants for LE Dynamic PSM values */ 158 #define LE_DYNAMIC_PSM_START 0x0080 159 #define LE_DYNAMIC_PSM_END 0x00FF 160 #define LE_DYNAMIC_PSM_RANGE (LE_DYNAMIC_PSM_END - LE_DYNAMIC_PSM_START + 1) 161 162 /* Bitmask to skip over Broadcom feature reserved (ID) to avoid sending two 163 successive ID values, '0' id only or both */ 164 #define L2CAP_ADJ_BRCM_ID 0x1 165 #define L2CAP_ADJ_ZERO_ID 0x2 166 #define L2CAP_ADJ_ID 0x3 167 168 /* Return values for l2cu_process_peer_cfg_req() */ 169 #define L2CAP_PEER_CFG_UNACCEPTABLE 0 170 #define L2CAP_PEER_CFG_OK 1 171 #define L2CAP_PEER_CFG_DISCONNECT 2 172 173 /* eL2CAP option constants */ 174 /* Min retransmission timeout if no flush timeout or PBF */ 175 #define L2CAP_MIN_RETRANS_TOUT 2000 176 /* Min monitor timeout if no flush timeout or PBF */ 177 #define L2CAP_MIN_MONITOR_TOUT 12000 178 179 #define L2CAP_MAX_FCR_CFG_TRIES 2 /* Config attempts before disconnecting */ 180 181 typedef uint8_t tL2C_BLE_FIXED_CHNLS_MASK; 182 183 typedef struct { 184 uint8_t next_tx_seq; /* Next sequence number to be Tx'ed */ 185 uint8_t last_rx_ack; /* Last sequence number ack'ed by the peer */ 186 uint8_t next_seq_expected; /* Next peer sequence number expected */ 187 uint8_t last_ack_sent; /* Last peer sequence number ack'ed */ 188 uint8_t num_tries; /* Number of retries to send a packet */ 189 uint8_t max_held_acks; /* Max acks we can hold before sending */ 190 191 bool remote_busy; /* true if peer has flowed us off */ 192 bool local_busy; /* true if we have flowed off the peer */ 193 194 bool rej_sent; /* Reject was sent */ 195 bool srej_sent; /* Selective Reject was sent */ 196 bool wait_ack; /* Transmitter is waiting ack (poll sent) */ 197 bool rej_after_srej; /* Send a REJ when SREJ clears */ 198 199 bool send_f_rsp; /* We need to send an F-bit response */ 200 201 uint16_t rx_sdu_len; /* Length of the SDU being received */ 202 BT_HDR* p_rx_sdu; /* Buffer holding the SDU being received */ 203 fixed_queue_t* 204 waiting_for_ack_q; /* Buffers sent and waiting for peer to ack */ 205 fixed_queue_t* srej_rcv_hold_q; /* Buffers rcvd but held pending SREJ rsp */ 206 fixed_queue_t* retrans_q; /* Buffers being retransmitted */ 207 208 alarm_t* ack_timer; /* Timer delaying RR */ 209 alarm_t* mon_retrans_timer; /* Timer Monitor or Retransmission */ 210 211 #if (L2CAP_ERTM_STATS == TRUE) 212 uint32_t connect_tick_count; /* Time channel was established */ 213 uint32_t ertm_pkt_counts[2]; /* Packets sent and received */ 214 uint32_t ertm_byte_counts[2]; /* Bytes sent and received */ 215 uint32_t s_frames_sent[4]; /* S-frames sent (RR, REJ, RNR, SREJ) */ 216 uint32_t s_frames_rcvd[4]; /* S-frames rcvd (RR, REJ, RNR, SREJ) */ 217 uint32_t xmit_window_closed; /* # of times the xmit window was closed */ 218 uint32_t controller_idle; /* # of times less than 2 packets in controller */ 219 /* when the xmit window was closed */ 220 uint32_t pkts_retransmitted; /* # of packets that were retransmitted */ 221 uint32_t retrans_touts; /* # of retransmission timouts */ 222 uint32_t xmit_ack_touts; /* # of xmit ack timouts */ 223 224 #define L2CAP_ERTM_STATS_NUM_AVG 10 225 #define L2CAP_ERTM_STATS_AVG_NUM_SAMPLES 100 226 uint32_t ack_delay_avg_count; 227 uint32_t ack_delay_avg_index; 228 uint32_t throughput_start; 229 uint32_t throughput[L2CAP_ERTM_STATS_NUM_AVG]; 230 uint32_t ack_delay_avg[L2CAP_ERTM_STATS_NUM_AVG]; 231 uint32_t ack_delay_min[L2CAP_ERTM_STATS_NUM_AVG]; 232 uint32_t ack_delay_max[L2CAP_ERTM_STATS_NUM_AVG]; 233 uint32_t ack_q_count_avg[L2CAP_ERTM_STATS_NUM_AVG]; 234 uint32_t ack_q_count_min[L2CAP_ERTM_STATS_NUM_AVG]; 235 uint32_t ack_q_count_max[L2CAP_ERTM_STATS_NUM_AVG]; 236 #endif 237 } tL2C_FCRB; 238 239 typedef struct { 240 bool in_use; 241 uint16_t psm; 242 uint16_t real_psm; /* This may be a dummy RCB for an o/b connection but */ 243 /* this is the real PSM that we need to connect to */ 244 tL2CAP_APPL_INFO api; 245 } tL2C_RCB; 246 247 #ifndef L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA 248 #define L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA 100 249 #endif 250 251 typedef void(tL2CAP_SEC_CBACK)(const RawAddress& bd_addr, 252 tBT_TRANSPORT trasnport, void* p_ref_data, 253 tBTM_STATUS result); 254 255 typedef struct { 256 uint16_t psm; 257 tBT_TRANSPORT transport; 258 bool is_originator; 259 tL2CAP_SEC_CBACK* p_callback; 260 void* p_ref_data; 261 } tL2CAP_SEC_DATA; 262 263 /* Define a channel control block (CCB). There may be many channel control 264 * blocks between the same two Bluetooth devices (i.e. on the same link). 265 * Each CCB has unique local and remote CIDs. All channel control blocks on 266 * the same physical link and are chained together. 267 */ 268 typedef struct t_l2c_ccb { 269 bool in_use; /* true when in use, false when not */ 270 tL2C_CHNL_STATE chnl_state; /* Channel state */ 271 tL2CAP_LE_CFG_INFO 272 local_conn_cfg; /* Our config for ble conn oriented channel */ 273 tL2CAP_LE_CFG_INFO 274 peer_conn_cfg; /* Peer device config ble conn oriented channel */ 275 bool is_first_seg; /* Dtermine whether the received packet is the first 276 segment or not */ 277 BT_HDR* ble_sdu; /* Buffer for storing unassembled sdu*/ 278 uint16_t ble_sdu_length; /* Length of unassembled sdu length*/ 279 struct t_l2c_ccb* p_next_ccb; /* Next CCB in the chain */ 280 struct t_l2c_ccb* p_prev_ccb; /* Previous CCB in the chain */ 281 struct t_l2c_linkcb* p_lcb; /* Link this CCB is assigned to */ 282 283 uint16_t local_cid; /* Local CID */ 284 uint16_t remote_cid; /* Remote CID */ 285 286 alarm_t* l2c_ccb_timer; /* CCB Timer Entry */ 287 288 tL2C_RCB* p_rcb; /* Registration CB for this Channel */ 289 bool should_free_rcb; /* True if RCB was allocated on the heap */ 290 291 #define IB_CFG_DONE 0x01 292 #define OB_CFG_DONE 0x02 293 #define RECONFIG_FLAG 0x04 /* True after initial configuration */ 294 #define CFG_DONE_MASK (IB_CFG_DONE | OB_CFG_DONE) 295 296 uint8_t config_done; /* Configuration flag word */ 297 uint8_t local_id; /* Transaction ID for local trans */ 298 uint8_t remote_id; /* Transaction ID for local */ 299 300 #define CCB_FLAG_NO_RETRY 0x01 /* no more retry */ 301 #define CCB_FLAG_SENT_PENDING 0x02 /* already sent pending response */ 302 uint8_t flags; 303 304 tL2CAP_CFG_INFO our_cfg; /* Our saved configuration options */ 305 tL2CAP_CH_CFG_BITS peer_cfg_bits; /* Store what peer wants to configure */ 306 tL2CAP_CFG_INFO peer_cfg; /* Peer's saved configuration options */ 307 308 fixed_queue_t* xmit_hold_q; /* Transmit data hold queue */ 309 bool cong_sent; /* Set when congested status sent */ 310 uint16_t buff_quota; /* Buffer quota before sending congestion */ 311 312 tL2CAP_CHNL_PRIORITY ccb_priority; /* Channel priority */ 313 tL2CAP_CHNL_DATA_RATE tx_data_rate; /* Channel Tx data rate */ 314 tL2CAP_CHNL_DATA_RATE rx_data_rate; /* Channel Rx data rate */ 315 316 /* Fields used for eL2CAP */ 317 tL2CAP_ERTM_INFO ertm_info; 318 tL2C_FCRB fcrb; 319 uint16_t tx_mps; /* TX MPS adjusted based on current controller */ 320 uint16_t max_rx_mtu; 321 uint8_t fcr_cfg_tries; /* Max number of negotiation attempts */ 322 bool peer_cfg_already_rejected; /* If mode rejected once, set to true */ 323 bool out_cfg_fcr_present; /* true if cfg response shoulkd include fcr options 324 */ 325 326 #define L2CAP_CFG_FCS_OUR 0x01 /* Our desired config FCS option */ 327 #define L2CAP_CFG_FCS_PEER 0x02 /* Peer's desired config FCS option */ 328 #define L2CAP_BYPASS_FCS (L2CAP_CFG_FCS_OUR | L2CAP_CFG_FCS_PEER) 329 uint8_t bypass_fcs; 330 331 #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) 332 bool is_flushable; /* true if channel is flushable */ 333 #endif 334 335 #if (L2CAP_NUM_FIXED_CHNLS > 0) 336 uint16_t fixed_chnl_idle_tout; /* Idle timeout to use for the fixed channel */ 337 #endif 338 uint16_t tx_data_len; 339 340 /* Number of LE frames that the remote can send to us (credit count in 341 * remote). Valid only for LE CoC */ 342 uint16_t remote_credit_count; 343 } tL2C_CCB; 344 345 /*********************************************************************** 346 * Define a queue of linked CCBs. 347 */ 348 typedef struct { 349 tL2C_CCB* p_first_ccb; /* The first channel in this queue */ 350 tL2C_CCB* p_last_ccb; /* The last channel in this queue */ 351 } tL2C_CCB_Q; 352 353 #if (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE) 354 355 /* Round-Robin service for the same priority channels */ 356 #define L2CAP_NUM_CHNL_PRIORITY \ 357 3 /* Total number of priority group (high, medium, low)*/ 358 #define L2CAP_CHNL_PRIORITY_WEIGHT \ 359 5 /* weight per priority for burst transmission quota */ 360 #define L2CAP_GET_PRIORITY_QUOTA(pri) \ 361 ((L2CAP_NUM_CHNL_PRIORITY - (pri)) * L2CAP_CHNL_PRIORITY_WEIGHT) 362 363 /* CCBs within the same LCB are served in round robin with priority It will make 364 * sure that low priority channel (for example, HF signaling on RFCOMM) can be 365 * sent to the headset even if higher priority channel (for example, AV media 366 * channel) is congested. 367 */ 368 369 typedef struct { 370 tL2C_CCB* p_serve_ccb; /* current serving ccb within priority group */ 371 tL2C_CCB* p_first_ccb; /* first ccb of priority group */ 372 uint8_t num_ccb; /* number of channels in priority group */ 373 uint8_t quota; /* burst transmission quota */ 374 } tL2C_RR_SERV; 375 376 #endif /* (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE) */ 377 378 /* Define a link control block. There is one link control block between 379 * this device and any other device (i.e. BD ADDR). 380 */ 381 typedef struct t_l2c_linkcb { 382 bool in_use; /* true when in use, false when not */ 383 tL2C_LINK_STATE link_state; 384 385 alarm_t* l2c_lcb_timer; /* Timer entry for timeout evt */ 386 uint16_t handle; /* The handle used with LM */ 387 388 tL2C_CCB_Q ccb_queue; /* Queue of CCBs on this LCB */ 389 390 tL2C_CCB* p_pending_ccb; /* ccb of waiting channel during link disconnect */ 391 alarm_t* info_resp_timer; /* Timer entry for info resp timeout evt */ 392 RawAddress remote_bd_addr; /* The BD address of the remote */ 393 394 uint8_t link_role; /* Master or slave */ 395 uint8_t id; 396 uint8_t cur_echo_id; /* Current id value for echo request */ 397 tL2CA_ECHO_RSP_CB* p_echo_rsp_cb; /* Echo response callback */ 398 uint16_t idle_timeout; /* Idle timeout */ 399 bool is_bonding; /* True - link active only for bonding */ 400 401 uint16_t link_flush_tout; /* Flush timeout used */ 402 403 uint16_t link_xmit_quota; /* Num outstanding pkts allowed */ 404 uint16_t sent_not_acked; /* Num packets sent but not acked */ 405 406 bool partial_segment_being_sent; /* Set true when a partial segment */ 407 /* is being sent. */ 408 bool w4_info_rsp; /* true when info request is active */ 409 uint8_t info_rx_bits; /* set 1 if received info type */ 410 uint32_t peer_ext_fea; /* Peer's extended features mask */ 411 list_t* link_xmit_data_q; /* Link transmit data buffer queue */ 412 413 uint8_t peer_chnl_mask[L2CAP_FIXED_CHNL_ARRAY_SIZE]; 414 415 BT_HDR* p_hcit_rcv_acl; /* Current HCIT ACL buf being rcvd */ 416 uint16_t idle_timeout_sv; /* Save current Idle timeout */ 417 uint8_t acl_priority; /* L2C_PRIORITY_NORMAL or L2C_PRIORITY_HIGH */ 418 tL2CA_NOCP_CB* p_nocp_cb; /* Num Cmpl pkts callback */ 419 420 #if (L2CAP_NUM_FIXED_CHNLS > 0) 421 tL2C_CCB* p_fixed_ccbs[L2CAP_NUM_FIXED_CHNLS]; 422 uint16_t disc_reason; 423 #endif 424 425 tBT_TRANSPORT transport; 426 uint8_t initiating_phys; // LE PHY used for connection initiation 427 tBLE_ADDR_TYPE ble_addr_type; 428 uint16_t tx_data_len; /* tx data length used in data length extension */ 429 fixed_queue_t* le_sec_pending_q; /* LE coc channels waiting for security check 430 completion */ 431 uint8_t sec_act; 432 #define L2C_BLE_CONN_UPDATE_DISABLE \ 433 0x1 /* disable update connection parameters */ 434 #define L2C_BLE_NEW_CONN_PARAM 0x2 /* new connection parameter to be set */ 435 #define L2C_BLE_UPDATE_PENDING \ 436 0x4 /* waiting for connection update finished \ 437 */ 438 #define L2C_BLE_NOT_DEFAULT_PARAM \ 439 0x8 /* not using default connection parameters */ 440 uint8_t conn_update_mask; 441 442 uint16_t min_interval; /* parameters as requested by peripheral */ 443 uint16_t max_interval; 444 uint16_t latency; 445 uint16_t timeout; 446 uint16_t min_ce_len; 447 uint16_t max_ce_len; 448 449 #if (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE) 450 /* each priority group is limited burst transmission */ 451 /* round robin service for the same priority channels */ 452 tL2C_RR_SERV rr_serv[L2CAP_NUM_CHNL_PRIORITY]; 453 uint8_t rr_pri; /* current serving priority group */ 454 #endif 455 456 } tL2C_LCB; 457 458 /* Define the L2CAP control structure 459 */ 460 typedef struct { 461 uint8_t l2cap_trace_level; 462 uint16_t controller_xmit_window; /* Total ACL window for all links */ 463 464 uint16_t round_robin_quota; /* Round-robin link quota */ 465 uint16_t round_robin_unacked; /* Round-robin unacked */ 466 bool check_round_robin; /* Do a round robin check */ 467 468 bool is_cong_cback_context; 469 470 tL2C_LCB lcb_pool[MAX_L2CAP_LINKS]; /* Link Control Block pool */ 471 tL2C_CCB ccb_pool[MAX_L2CAP_CHANNELS]; /* Channel Control Block pool */ 472 tL2C_RCB rcb_pool[MAX_L2CAP_CLIENTS]; /* Registration info pool */ 473 474 tL2C_CCB* p_free_ccb_first; /* Pointer to first free CCB */ 475 tL2C_CCB* p_free_ccb_last; /* Pointer to last free CCB */ 476 477 uint8_t 478 desire_role; /* desire to be master/slave when accepting a connection */ 479 bool disallow_switch; /* false, to allow switch at create conn */ 480 uint16_t num_lm_acl_bufs; /* # of ACL buffers on controller */ 481 uint16_t idle_timeout; /* Idle timeout */ 482 483 list_t* rcv_pending_q; /* Recv pending queue */ 484 alarm_t* receive_hold_timer; /* Timer entry for rcv hold */ 485 486 tL2C_LCB* p_cur_hcit_lcb; /* Current HCI Transport buffer */ 487 uint16_t num_links_active; /* Number of links active */ 488 489 #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) 490 uint16_t non_flushable_pbf; /* L2CAP_PKT_START_NON_FLUSHABLE if controller 491 supports */ 492 /* Otherwise, L2CAP_PKT_START */ 493 bool is_flush_active; /* true if an HCI_Enhanced_Flush has been sent */ 494 #endif 495 496 #if (L2CAP_CONFORMANCE_TESTING == TRUE) 497 uint32_t test_info_resp; /* Conformance testing needs a dynamic response */ 498 #endif 499 500 #if (L2CAP_NUM_FIXED_CHNLS > 0) 501 tL2CAP_FIXED_CHNL_REG 502 fixed_reg[L2CAP_NUM_FIXED_CHNLS]; /* Reg info for fixed channels */ 503 #endif 504 505 uint16_t num_ble_links_active; /* Number of LE links active */ 506 bool is_ble_connecting; 507 RawAddress ble_connecting_bda; 508 uint16_t controller_le_xmit_window; /* Total ACL window for all links */ 509 tL2C_BLE_FIXED_CHNLS_MASK l2c_ble_fixed_chnls_mask; // LE fixed channels mask 510 uint16_t num_lm_ble_bufs; /* # of ACL buffers on controller */ 511 uint16_t ble_round_robin_quota; /* Round-robin link quota */ 512 uint16_t ble_round_robin_unacked; /* Round-robin unacked */ 513 bool ble_check_round_robin; /* Do a round robin check */ 514 tL2C_RCB ble_rcb_pool[BLE_MAX_L2CAP_CLIENTS]; /* Registration info pool */ 515 516 tL2CA_ECHO_DATA_CB* p_echo_data_cb; /* Echo data callback */ 517 518 #if (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == TRUE) 519 uint16_t high_pri_min_xmit_quota; /* Minimum number of ACL credit for high 520 priority link */ 521 #endif /* (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == TRUE) */ 522 523 uint16_t dyn_psm; 524 525 uint16_t le_dyn_psm; /* Next LE dynamic PSM value to try to assign */ 526 bool le_dyn_psm_assigned[LE_DYNAMIC_PSM_RANGE]; /* Table of assigned LE PSM */ 527 528 } tL2C_CB; 529 530 /* Define a structure that contains the information about a connection. 531 * This structure is used to pass between functions, and not all the 532 * fields will always be filled in. 533 */ 534 typedef struct { 535 RawAddress bd_addr; /* Remote BD address */ 536 uint8_t status; /* Connection status */ 537 uint16_t psm; /* PSM of the connection */ 538 uint16_t l2cap_result; /* L2CAP result */ 539 uint16_t l2cap_status; /* L2CAP status */ 540 uint16_t remote_cid; /* Remote CID */ 541 } tL2C_CONN_INFO; 542 543 typedef void(tL2C_FCR_MGMT_EVT_HDLR)(uint8_t, tL2C_CCB*); 544 545 /* Necessary info for postponed TX completion callback 546 */ 547 typedef struct { 548 uint16_t local_cid; 549 uint16_t num_sdu; 550 tL2CA_TX_COMPLETE_CB* cb; 551 } tL2C_TX_COMPLETE_CB_INFO; 552 553 /* The offset in a buffer that L2CAP will use when building commands. 554 */ 555 #define L2CAP_SEND_CMD_OFFSET 0 556 557 /* Number of ACL buffers to use for high priority channel 558 */ 559 #if (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == FALSE) 560 #define L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A (L2CAP_HIGH_PRI_MIN_XMIT_QUOTA) 561 #else 562 #define L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A (l2cb.high_pri_min_xmit_quota) 563 #endif 564 565 /* L2CAP global data 566 *********************************** 567 */ 568 extern tL2C_CB l2cb; 569 570 /* Functions provided by l2c_main.cc 571 *********************************** 572 */ 573 void l2c_init(void); 574 void l2c_free(void); 575 576 extern void l2c_receive_hold_timer_timeout(void* data); 577 extern void l2c_ccb_timer_timeout(void* data); 578 extern void l2c_lcb_timer_timeout(void* data); 579 extern void l2c_fcrb_ack_timer_timeout(void* data); 580 extern uint8_t l2c_data_write(uint16_t cid, BT_HDR* p_data, uint16_t flag); 581 extern void l2c_rcv_acl_data(BT_HDR* p_msg); 582 extern void l2c_process_held_packets(bool timed_out); 583 584 /* Functions provided by l2c_utils.cc 585 *********************************** 586 */ 587 extern bool l2cu_can_allocate_lcb(void); 588 extern tL2C_LCB* l2cu_allocate_lcb(const RawAddress& p_bd_addr, bool is_bonding, 589 tBT_TRANSPORT transport); 590 extern bool l2cu_start_post_bond_timer(uint16_t handle); 591 extern void l2cu_release_lcb(tL2C_LCB* p_lcb); 592 extern tL2C_LCB* l2cu_find_lcb_by_bd_addr(const RawAddress& p_bd_addr, 593 tBT_TRANSPORT transport); 594 extern tL2C_LCB* l2cu_find_lcb_by_handle(uint16_t handle); 595 extern void l2cu_update_lcb_4_bonding(const RawAddress& p_bd_addr, 596 bool is_bonding); 597 598 extern uint8_t l2cu_get_conn_role(tL2C_LCB* p_this_lcb); 599 extern bool l2cu_set_acl_priority(const RawAddress& bd_addr, uint8_t priority, 600 bool reset_after_rs); 601 602 extern void l2cu_enqueue_ccb(tL2C_CCB* p_ccb); 603 extern void l2cu_dequeue_ccb(tL2C_CCB* p_ccb); 604 extern void l2cu_change_pri_ccb(tL2C_CCB* p_ccb, tL2CAP_CHNL_PRIORITY priority); 605 606 extern tL2C_CCB* l2cu_allocate_ccb(tL2C_LCB* p_lcb, uint16_t cid); 607 extern void l2cu_release_ccb(tL2C_CCB* p_ccb); 608 extern tL2C_CCB* l2cu_find_ccb_by_cid(tL2C_LCB* p_lcb, uint16_t local_cid); 609 extern tL2C_CCB* l2cu_find_ccb_by_remote_cid(tL2C_LCB* p_lcb, 610 uint16_t remote_cid); 611 extern void l2cu_adj_id(tL2C_LCB* p_lcb, uint8_t adj_mask); 612 extern bool l2c_is_cmd_rejected(uint8_t cmd_code, uint8_t id, tL2C_LCB* p_lcb); 613 614 extern void l2cu_send_peer_cmd_reject(tL2C_LCB* p_lcb, uint16_t reason, 615 uint8_t rem_id, uint16_t p1, uint16_t p2); 616 extern void l2cu_send_peer_connect_req(tL2C_CCB* p_ccb); 617 extern void l2cu_send_peer_connect_rsp(tL2C_CCB* p_ccb, uint16_t result, 618 uint16_t status); 619 extern void l2cu_send_peer_config_req(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 620 extern void l2cu_send_peer_config_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 621 extern void l2cu_send_peer_config_rej(tL2C_CCB* p_ccb, uint8_t* p_data, 622 uint16_t data_len, uint16_t rej_len); 623 extern void l2cu_send_peer_disc_req(tL2C_CCB* p_ccb); 624 extern void l2cu_send_peer_disc_rsp(tL2C_LCB* p_lcb, uint8_t remote_id, 625 uint16_t local_cid, uint16_t remote_cid); 626 extern void l2cu_send_peer_echo_req(tL2C_LCB* p_lcb, uint8_t* p_data, 627 uint16_t data_len); 628 extern void l2cu_send_peer_echo_rsp(tL2C_LCB* p_lcb, uint8_t id, 629 uint8_t* p_data, uint16_t data_len); 630 extern void l2cu_send_peer_info_rsp(tL2C_LCB* p_lcb, uint8_t id, 631 uint16_t info_type); 632 extern void l2cu_reject_connection(tL2C_LCB* p_lcb, uint16_t remote_cid, 633 uint8_t rem_id, uint16_t result); 634 extern void l2cu_send_peer_info_req(tL2C_LCB* p_lcb, uint16_t info_type); 635 extern void l2cu_set_acl_hci_header(BT_HDR* p_buf, tL2C_CCB* p_ccb); 636 extern void l2cu_check_channel_congestion(tL2C_CCB* p_ccb); 637 extern void l2cu_disconnect_chnl(tL2C_CCB* p_ccb); 638 639 extern void l2cu_tx_complete(tL2C_TX_COMPLETE_CB_INFO* p_cbi); 640 641 #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) 642 extern void l2cu_set_non_flushable_pbf(bool); 643 #endif 644 645 extern void l2cu_send_peer_ble_par_req(tL2C_LCB* p_lcb, uint16_t min_int, 646 uint16_t max_int, uint16_t latency, 647 uint16_t timeout); 648 extern void l2cu_send_peer_ble_par_rsp(tL2C_LCB* p_lcb, uint16_t reason, 649 uint8_t rem_id); 650 extern void l2cu_reject_ble_connection(tL2C_LCB* p_lcb, uint8_t rem_id, 651 uint16_t result); 652 extern void l2cu_send_peer_ble_credit_based_conn_res(tL2C_CCB* p_ccb, 653 uint16_t result); 654 extern void l2cu_send_peer_ble_credit_based_conn_req(tL2C_CCB* p_ccb); 655 extern void l2cu_send_peer_ble_flow_control_credit(tL2C_CCB* p_ccb, 656 uint16_t credit_value); 657 extern void l2cu_send_peer_ble_credit_based_disconn_req(tL2C_CCB* p_ccb); 658 659 extern bool l2cu_initialize_fixed_ccb(tL2C_LCB* p_lcb, uint16_t fixed_cid, 660 tL2CAP_FCR_OPTS* p_fcr); 661 extern void l2cu_no_dynamic_ccbs(tL2C_LCB* p_lcb); 662 extern void l2cu_process_fixed_chnl_resp(tL2C_LCB* p_lcb); 663 extern bool l2cu_is_ccb_active(tL2C_CCB* p_ccb); 664 665 /* Functions provided for Broadcom Aware 666 *************************************** 667 */ 668 extern bool l2cu_check_feature_req(tL2C_LCB* p_lcb, uint8_t id, uint8_t* p_data, 669 uint16_t data_len); 670 extern void l2cu_check_feature_rsp(tL2C_LCB* p_lcb, uint8_t id, uint8_t* p_data, 671 uint16_t data_len); 672 extern void l2cu_send_feature_req(tL2C_CCB* p_ccb); 673 674 extern tL2C_RCB* l2cu_allocate_rcb(uint16_t psm); 675 extern tL2C_RCB* l2cu_find_rcb_by_psm(uint16_t psm); 676 extern void l2cu_release_rcb(tL2C_RCB* p_rcb); 677 extern void l2cu_release_ble_rcb(tL2C_RCB* p_rcb); 678 extern tL2C_RCB* l2cu_allocate_ble_rcb(uint16_t psm); 679 extern tL2C_RCB* l2cu_find_ble_rcb_by_psm(uint16_t psm); 680 681 extern uint8_t l2cu_process_peer_cfg_req(tL2C_CCB* p_ccb, 682 tL2CAP_CFG_INFO* p_cfg); 683 extern void l2cu_process_peer_cfg_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 684 extern void l2cu_process_our_cfg_req(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 685 extern void l2cu_process_our_cfg_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 686 687 extern void l2cu_device_reset(void); 688 extern tL2C_LCB* l2cu_find_lcb_by_state(tL2C_LINK_STATE state); 689 extern bool l2cu_lcb_disconnecting(void); 690 691 extern bool l2cu_create_conn(tL2C_LCB* p_lcb, tBT_TRANSPORT transport); 692 extern bool l2cu_create_conn(tL2C_LCB* p_lcb, tBT_TRANSPORT transport, 693 uint8_t initiating_phys); 694 extern bool l2cu_create_conn_after_switch(tL2C_LCB* p_lcb); 695 extern BT_HDR* l2cu_get_next_buffer_to_send(tL2C_LCB* p_lcb, 696 tL2C_TX_COMPLETE_CB_INFO* p_cbi); 697 extern void l2cu_resubmit_pending_sec_req(const RawAddress* p_bda); 698 extern void l2cu_initialize_amp_ccb(tL2C_LCB* p_lcb); 699 extern void l2cu_adjust_out_mps(tL2C_CCB* p_ccb); 700 701 /* Functions provided by l2c_link.cc 702 *********************************** 703 */ 704 extern bool l2c_link_hci_conn_req(const RawAddress& bd_addr); 705 extern bool l2c_link_hci_conn_comp(uint8_t status, uint16_t handle, 706 const RawAddress& p_bda); 707 extern bool l2c_link_hci_disc_comp(uint16_t handle, uint8_t reason); 708 extern bool l2c_link_hci_qos_violation(uint16_t handle); 709 extern void l2c_link_timeout(tL2C_LCB* p_lcb); 710 extern void l2c_info_resp_timer_timeout(void* data); 711 extern void l2c_link_check_send_pkts(tL2C_LCB* p_lcb, tL2C_CCB* p_ccb, 712 BT_HDR* p_buf); 713 extern void l2c_link_adjust_allocation(void); 714 extern void l2c_link_process_num_completed_pkts(uint8_t* p); 715 extern void l2c_link_process_num_completed_blocks(uint8_t controller_id, 716 uint8_t* p, uint16_t evt_len); 717 extern void l2c_link_processs_num_bufs(uint16_t num_lm_acl_bufs); 718 extern uint8_t l2c_link_pkts_rcvd(uint16_t* num_pkts, uint16_t* handles); 719 extern void l2c_link_role_changed(const RawAddress* bd_addr, uint8_t new_role, 720 uint8_t hci_status); 721 extern void l2c_link_sec_comp(const RawAddress* p_bda, tBT_TRANSPORT trasnport, 722 void* p_ref_data, uint8_t status); 723 extern void l2c_link_sec_comp2(const RawAddress& p_bda, tBT_TRANSPORT trasnport, 724 void* p_ref_data, uint8_t status); 725 extern void l2c_link_segments_xmitted(BT_HDR* p_msg); 726 extern void l2c_pin_code_request(const RawAddress& bd_addr); 727 extern void l2c_link_adjust_chnl_allocation(void); 728 729 extern void l2c_link_processs_ble_num_bufs(uint16_t num_lm_acl_bufs); 730 731 #if (L2CAP_WAKE_PARKED_LINK == TRUE) 732 extern bool l2c_link_check_power_mode(tL2C_LCB* p_lcb); 733 #define L2C_LINK_CHECK_POWER_MODE(x) l2c_link_check_power_mode((x)) 734 #else // L2CAP_WAKE_PARKED_LINK 735 #define L2C_LINK_CHECK_POWER_MODE(x) (false) 736 #endif // L2CAP_WAKE_PARKED_LINK 737 738 #if (L2CAP_CONFORMANCE_TESTING == TRUE) 739 /* Used only for conformance testing */ 740 extern void l2cu_set_info_rsp_mask(uint32_t mask); 741 #endif 742 743 /* Functions provided by l2c_csm.cc 744 *********************************** 745 */ 746 extern void l2c_csm_execute(tL2C_CCB* p_ccb, uint16_t event, void* p_data); 747 748 extern void l2c_enqueue_peer_data(tL2C_CCB* p_ccb, BT_HDR* p_buf); 749 750 /* Functions provided by l2c_fcr.cc 751 *********************************** 752 */ 753 extern void l2c_fcr_cleanup(tL2C_CCB* p_ccb); 754 extern void l2c_fcr_proc_pdu(tL2C_CCB* p_ccb, BT_HDR* p_buf); 755 extern void l2c_fcr_proc_tout(tL2C_CCB* p_ccb); 756 extern void l2c_fcr_proc_ack_tout(tL2C_CCB* p_ccb); 757 extern void l2c_fcr_send_S_frame(tL2C_CCB* p_ccb, uint16_t function_code, 758 uint16_t pf_bit); 759 extern BT_HDR* l2c_fcr_clone_buf(BT_HDR* p_buf, uint16_t new_offset, 760 uint16_t no_of_bytes); 761 extern bool l2c_fcr_is_flow_controlled(tL2C_CCB* p_ccb); 762 extern BT_HDR* l2c_fcr_get_next_xmit_sdu_seg(tL2C_CCB* p_ccb, 763 uint16_t max_packet_length); 764 extern void l2c_fcr_start_timer(tL2C_CCB* p_ccb); 765 extern void l2c_lcc_proc_pdu(tL2C_CCB* p_ccb, BT_HDR* p_buf); 766 extern BT_HDR* l2c_lcc_get_next_xmit_sdu_seg(tL2C_CCB* p_ccb, 767 bool* last_piece_of_sdu); 768 769 /* Configuration negotiation */ 770 extern uint8_t l2c_fcr_chk_chan_modes(tL2C_CCB* p_ccb); 771 extern bool l2c_fcr_adj_our_req_options(tL2C_CCB* p_ccb, 772 tL2CAP_CFG_INFO* p_cfg); 773 extern void l2c_fcr_adj_our_rsp_options(tL2C_CCB* p_ccb, 774 tL2CAP_CFG_INFO* p_peer_cfg); 775 extern bool l2c_fcr_renegotiate_chan(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 776 extern uint8_t l2c_fcr_process_peer_cfg_req(tL2C_CCB* p_ccb, 777 tL2CAP_CFG_INFO* p_cfg); 778 extern void l2c_fcr_adj_monitor_retran_timeout(tL2C_CCB* p_ccb); 779 extern void l2c_fcr_stop_timer(tL2C_CCB* p_ccb); 780 781 /* Functions provided by l2c_ble.cc 782 *********************************** 783 */ 784 extern bool l2cble_create_conn(tL2C_LCB* p_lcb); 785 extern void l2cble_process_sig_cmd(tL2C_LCB* p_lcb, uint8_t* p, 786 uint16_t pkt_len); 787 extern void l2cble_conn_comp(uint16_t handle, uint8_t role, 788 const RawAddress& bda, tBLE_ADDR_TYPE type, 789 uint16_t conn_interval, uint16_t conn_latency, 790 uint16_t conn_timeout); 791 extern bool l2cble_init_direct_conn(tL2C_LCB* p_lcb); 792 extern void l2cble_notify_le_connection(const RawAddress& bda); 793 extern void l2c_ble_link_adjust_allocation(void); 794 extern void l2cble_process_conn_update_evt(uint16_t handle, uint8_t status, 795 uint16_t interval, uint16_t latency, 796 uint16_t timeout); 797 798 extern void l2cble_credit_based_conn_req(tL2C_CCB* p_ccb); 799 extern void l2cble_credit_based_conn_res(tL2C_CCB* p_ccb, uint16_t result); 800 extern void l2cble_send_peer_disc_req(tL2C_CCB* p_ccb); 801 extern void l2cble_send_flow_control_credit(tL2C_CCB* p_ccb, 802 uint16_t credit_value); 803 extern bool l2ble_sec_access_req(const RawAddress& bd_addr, uint16_t psm, 804 bool is_originator, 805 tL2CAP_SEC_CBACK* p_callback, 806 void* p_ref_data); 807 808 #if (BLE_LLT_INCLUDED == TRUE) 809 extern void l2cble_process_rc_param_request_evt(uint16_t handle, 810 uint16_t int_min, 811 uint16_t int_max, 812 uint16_t latency, 813 uint16_t timeout); 814 #endif 815 816 extern void l2cble_update_data_length(tL2C_LCB* p_lcb); 817 extern void l2cble_set_fixed_channel_tx_data_length( 818 const RawAddress& remote_bda, uint16_t fix_cid, uint16_t tx_mtu); 819 extern void l2cble_process_data_length_change_event(uint16_t handle, 820 uint16_t tx_data_len, 821 uint16_t rx_data_len); 822 823 extern void l2cu_process_fixed_disc_cback(tL2C_LCB* p_lcb); 824 825 #endif 826