1 /****************************************************************************** 2 * 3 * Copyright (C) 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 #define L2CAP_LE_MIN_MTU 23 41 #define L2CAP_LE_MIN_MPS 23 42 #define L2CAP_LE_MAX_MPS 65533 43 #define L2CAP_LE_MIN_CREDIT 0 44 #define L2CAP_LE_MAX_CREDIT 65535 45 #define L2CAP_LE_DEFAULT_MTU 512 46 #define L2CAP_LE_DEFAULT_MPS 23 47 #define L2CAP_LE_DEFAULT_CREDIT 1 48 49 /* 50 * Timeout values (in milliseconds). 51 */ 52 #define L2CAP_LINK_ROLE_SWITCH_TIMEOUT_MS (10 * 1000) /* 10 seconds */ 53 #define L2CAP_LINK_CONNECT_TIMEOUT_MS (60 * 1000) /* 30 seconds */ 54 #define L2CAP_LINK_CONNECT_EXT_TIMEOUT_MS (120 * 1000) /* 120 seconds */ 55 #define L2CAP_ECHO_RSP_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 56 #define L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS (2 * 1000) /* 2 seconds */ 57 #define L2CAP_LINK_DISCONNECT_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 58 #define L2CAP_CHNL_CONNECT_TIMEOUT_MS (60 * 1000) /* 60 seconds */ 59 #define L2CAP_CHNL_CONNECT_EXT_TIMEOUT_MS (120 * 1000) /* 120 seconds */ 60 #define L2CAP_CHNL_CFG_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 61 #define L2CAP_CHNL_DISCONNECT_TIMEOUT_MS (10 * 1000) /* 10 seconds */ 62 #define L2CAP_DELAY_CHECK_SM4_TIMEOUT_MS (2 * 1000) /* 2 seconds */ 63 #define L2CAP_WAIT_INFO_RSP_TIMEOUT_MS (3 * 1000) /* 3 seconds */ 64 #define L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS (30 * 1000) /* 30 seconds */ 65 #define L2CAP_FCR_ACK_TIMEOUT_MS 200 /* 200 milliseconds */ 66 67 /* Define the possible L2CAP channel states. The names of 68 * the states may seem a bit strange, but they are taken from 69 * the Bluetooth specification. 70 */ 71 typedef enum { 72 CST_CLOSED, /* Channel is in closed state */ 73 CST_ORIG_W4_SEC_COMP, /* Originator waits security clearence */ 74 CST_TERM_W4_SEC_COMP, /* Acceptor waits security clearence */ 75 CST_W4_L2CAP_CONNECT_RSP, /* Waiting for peer conenct response */ 76 CST_W4_L2CA_CONNECT_RSP, /* Waiting for upper layer connect rsp */ 77 CST_CONFIG, /* Negotiating configuration */ 78 CST_OPEN, /* Data transfer state */ 79 CST_W4_L2CAP_DISCONNECT_RSP, /* Waiting for peer disconnect rsp */ 80 CST_W4_L2CA_DISCONNECT_RSP /* Waiting for upper layer disc rsp */ 81 } tL2C_CHNL_STATE; 82 83 /* Define the possible L2CAP link states 84 */ 85 typedef enum { 86 LST_DISCONNECTED, 87 LST_CONNECT_HOLDING, 88 LST_CONNECTING_WAIT_SWITCH, 89 LST_CONNECTING, 90 LST_CONNECTED, 91 LST_DISCONNECTING 92 } tL2C_LINK_STATE; 93 94 /* Define input events to the L2CAP link and channel state machines. The names 95 * of the events may seem a bit strange, but they are taken from 96 * the Bluetooth specification. 97 */ 98 /* Lower layer */ 99 #define L2CEVT_LP_CONNECT_CFM 0 /* connect confirm */ 100 #define L2CEVT_LP_CONNECT_CFM_NEG 1 /* connect confirm (failed) */ 101 #define L2CEVT_LP_CONNECT_IND 2 /* connect indication */ 102 #define L2CEVT_LP_DISCONNECT_IND 3 /* disconnect indication */ 103 #define L2CEVT_LP_QOS_CFM 4 /* QOS confirmation */ 104 #define L2CEVT_LP_QOS_CFM_NEG 5 /* QOS confirmation (failed)*/ 105 #define L2CEVT_LP_QOS_VIOLATION_IND 6 /* QOS violation indication */ 106 107 /* Security */ 108 #define L2CEVT_SEC_COMP 7 /* cleared successfully */ 109 #define L2CEVT_SEC_COMP_NEG 8 /* procedure failed */ 110 111 /* Peer connection */ 112 #define L2CEVT_L2CAP_CONNECT_REQ 10 /* request */ 113 #define L2CEVT_L2CAP_CONNECT_RSP 11 /* response */ 114 #define L2CEVT_L2CAP_CONNECT_RSP_PND 12 /* response pending */ 115 #define L2CEVT_L2CAP_CONNECT_RSP_NEG 13 /* response (failed) */ 116 117 /* Peer configuration */ 118 #define L2CEVT_L2CAP_CONFIG_REQ 14 /* request */ 119 #define L2CEVT_L2CAP_CONFIG_RSP 15 /* response */ 120 #define L2CEVT_L2CAP_CONFIG_RSP_NEG 16 /* response (failed) */ 121 122 #define L2CEVT_L2CAP_DISCONNECT_REQ 17 /* Peer disconnect request */ 123 #define L2CEVT_L2CAP_DISCONNECT_RSP 18 /* Peer disconnect response */ 124 #define L2CEVT_L2CAP_INFO_RSP 19 /* Peer information response */ 125 #define L2CEVT_L2CAP_DATA 20 /* Peer data */ 126 127 /* Upper layer */ 128 #define L2CEVT_L2CA_CONNECT_REQ 21 /* connect request */ 129 #define L2CEVT_L2CA_CONNECT_RSP 22 /* connect response */ 130 #define L2CEVT_L2CA_CONNECT_RSP_NEG 23 /* connect response (failed)*/ 131 #define L2CEVT_L2CA_CONFIG_REQ 24 /* config request */ 132 #define L2CEVT_L2CA_CONFIG_RSP 25 /* config response */ 133 #define L2CEVT_L2CA_CONFIG_RSP_NEG 26 /* config response (failed) */ 134 #define L2CEVT_L2CA_DISCONNECT_REQ 27 /* disconnect request */ 135 #define L2CEVT_L2CA_DISCONNECT_RSP 28 /* disconnect response */ 136 #define L2CEVT_L2CA_DATA_READ 29 /* data read */ 137 #define L2CEVT_L2CA_DATA_WRITE 30 /* data write */ 138 #define L2CEVT_L2CA_FLUSH_REQ 31 /* flush */ 139 140 #define L2CEVT_TIMEOUT 32 /* Timeout */ 141 #define L2CEVT_SEC_RE_SEND_CMD 33 /* btm_sec has enough info to proceed */ 142 143 #define L2CEVT_ACK_TIMEOUT 34 /* RR delay timeout */ 144 145 #define L2CEVT_L2CA_SEND_FLOW_CONTROL_CREDIT \ 146 35 /* Upper layer credit packet \ 147 */ 148 #define L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT 36 /* Peer credit packet */ 149 150 /* Bitmask to skip over Broadcom feature reserved (ID) to avoid sending two 151 successive ID values, '0' id only or both */ 152 #define L2CAP_ADJ_BRCM_ID 0x1 153 #define L2CAP_ADJ_ZERO_ID 0x2 154 #define L2CAP_ADJ_ID 0x3 155 156 /* Return values for l2cu_process_peer_cfg_req() */ 157 #define L2CAP_PEER_CFG_UNACCEPTABLE 0 158 #define L2CAP_PEER_CFG_OK 1 159 #define L2CAP_PEER_CFG_DISCONNECT 2 160 161 /* eL2CAP option constants */ 162 /* Min retransmission timeout if no flush timeout or PBF */ 163 #define L2CAP_MIN_RETRANS_TOUT 2000 164 /* Min monitor timeout if no flush timeout or PBF */ 165 #define L2CAP_MIN_MONITOR_TOUT 12000 166 167 #define L2CAP_MAX_FCR_CFG_TRIES 2 /* Config attempts before disconnecting */ 168 169 typedef uint8_t tL2C_BLE_FIXED_CHNLS_MASK; 170 171 typedef struct { 172 uint8_t next_tx_seq; /* Next sequence number to be Tx'ed */ 173 uint8_t last_rx_ack; /* Last sequence number ack'ed by the peer */ 174 uint8_t next_seq_expected; /* Next peer sequence number expected */ 175 uint8_t last_ack_sent; /* Last peer sequence number ack'ed */ 176 uint8_t num_tries; /* Number of retries to send a packet */ 177 uint8_t max_held_acks; /* Max acks we can hold before sending */ 178 179 bool remote_busy; /* true if peer has flowed us off */ 180 bool local_busy; /* true if we have flowed off the peer */ 181 182 bool rej_sent; /* Reject was sent */ 183 bool srej_sent; /* Selective Reject was sent */ 184 bool wait_ack; /* Transmitter is waiting ack (poll sent) */ 185 bool rej_after_srej; /* Send a REJ when SREJ clears */ 186 187 bool send_f_rsp; /* We need to send an F-bit response */ 188 189 uint16_t rx_sdu_len; /* Length of the SDU being received */ 190 BT_HDR* p_rx_sdu; /* Buffer holding the SDU being received */ 191 fixed_queue_t* 192 waiting_for_ack_q; /* Buffers sent and waiting for peer to ack */ 193 fixed_queue_t* srej_rcv_hold_q; /* Buffers rcvd but held pending SREJ rsp */ 194 fixed_queue_t* retrans_q; /* Buffers being retransmitted */ 195 196 alarm_t* ack_timer; /* Timer delaying RR */ 197 alarm_t* mon_retrans_timer; /* Timer Monitor or Retransmission */ 198 199 #if (L2CAP_ERTM_STATS == TRUE) 200 uint32_t connect_tick_count; /* Time channel was established */ 201 uint32_t ertm_pkt_counts[2]; /* Packets sent and received */ 202 uint32_t ertm_byte_counts[2]; /* Bytes sent and received */ 203 uint32_t s_frames_sent[4]; /* S-frames sent (RR, REJ, RNR, SREJ) */ 204 uint32_t s_frames_rcvd[4]; /* S-frames rcvd (RR, REJ, RNR, SREJ) */ 205 uint32_t xmit_window_closed; /* # of times the xmit window was closed */ 206 uint32_t controller_idle; /* # of times less than 2 packets in controller */ 207 /* when the xmit window was closed */ 208 uint32_t pkts_retransmitted; /* # of packets that were retransmitted */ 209 uint32_t retrans_touts; /* # of retransmission timouts */ 210 uint32_t xmit_ack_touts; /* # of xmit ack timouts */ 211 212 #define L2CAP_ERTM_STATS_NUM_AVG 10 213 #define L2CAP_ERTM_STATS_AVG_NUM_SAMPLES 100 214 uint32_t ack_delay_avg_count; 215 uint32_t ack_delay_avg_index; 216 uint32_t throughput_start; 217 uint32_t throughput[L2CAP_ERTM_STATS_NUM_AVG]; 218 uint32_t ack_delay_avg[L2CAP_ERTM_STATS_NUM_AVG]; 219 uint32_t ack_delay_min[L2CAP_ERTM_STATS_NUM_AVG]; 220 uint32_t ack_delay_max[L2CAP_ERTM_STATS_NUM_AVG]; 221 uint32_t ack_q_count_avg[L2CAP_ERTM_STATS_NUM_AVG]; 222 uint32_t ack_q_count_min[L2CAP_ERTM_STATS_NUM_AVG]; 223 uint32_t ack_q_count_max[L2CAP_ERTM_STATS_NUM_AVG]; 224 #endif 225 } tL2C_FCRB; 226 227 /* Define a registration control block. Every application (e.g. RFCOMM, SDP, 228 * TCS etc) that registers with L2CAP is assigned one of these. 229 */ 230 #if (L2CAP_UCD_INCLUDED == TRUE) 231 #define L2C_UCD_RCB_ID 0x00 232 #define L2C_UCD_STATE_UNUSED 0x00 233 #define L2C_UCD_STATE_W4_DATA 0x01 234 #define L2C_UCD_STATE_W4_RECEPTION 0x02 235 #define L2C_UCD_STATE_W4_MTU 0x04 236 237 typedef struct { 238 uint8_t state; 239 tL2CAP_UCD_CB_INFO cb_info; 240 } tL2C_UCD_REG; 241 #endif 242 243 typedef struct { 244 bool in_use; 245 uint16_t psm; 246 uint16_t real_psm; /* This may be a dummy RCB for an o/b connection but */ 247 /* this is the real PSM that we need to connect to */ 248 #if (L2CAP_UCD_INCLUDED == TRUE) 249 tL2C_UCD_REG ucd; 250 #endif 251 252 tL2CAP_APPL_INFO api; 253 } tL2C_RCB; 254 255 #ifndef L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA 256 #define L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA 100 257 #endif 258 259 typedef void(tL2CAP_SEC_CBACK)(const RawAddress& bd_addr, 260 tBT_TRANSPORT trasnport, void* p_ref_data, 261 tBTM_STATUS result); 262 263 typedef struct { 264 uint16_t psm; 265 tBT_TRANSPORT transport; 266 bool is_originator; 267 tL2CAP_SEC_CBACK* p_callback; 268 void* p_ref_data; 269 } tL2CAP_SEC_DATA; 270 271 /* Define a channel control block (CCB). There may be many channel control 272 * blocks between the same two Bluetooth devices (i.e. on the same link). 273 * Each CCB has unique local and remote CIDs. All channel control blocks on 274 * the same physical link and are chained together. 275 */ 276 typedef struct t_l2c_ccb { 277 bool in_use; /* true when in use, false when not */ 278 tL2C_CHNL_STATE chnl_state; /* Channel state */ 279 tL2CAP_LE_CFG_INFO 280 local_conn_cfg; /* Our config for ble conn oriented channel */ 281 tL2CAP_LE_CFG_INFO 282 peer_conn_cfg; /* Peer device config ble conn oriented channel */ 283 bool is_first_seg; /* Dtermine whether the received packet is the first 284 segment or not */ 285 BT_HDR* ble_sdu; /* Buffer for storing unassembled sdu*/ 286 uint16_t ble_sdu_length; /* Length of unassembled sdu length*/ 287 struct t_l2c_ccb* p_next_ccb; /* Next CCB in the chain */ 288 struct t_l2c_ccb* p_prev_ccb; /* Previous CCB in the chain */ 289 struct t_l2c_linkcb* p_lcb; /* Link this CCB is assigned to */ 290 291 uint16_t local_cid; /* Local CID */ 292 uint16_t remote_cid; /* Remote CID */ 293 294 alarm_t* l2c_ccb_timer; /* CCB Timer Entry */ 295 296 tL2C_RCB* p_rcb; /* Registration CB for this Channel */ 297 bool should_free_rcb; /* True if RCB was allocated on the heap */ 298 299 #define IB_CFG_DONE 0x01 300 #define OB_CFG_DONE 0x02 301 #define RECONFIG_FLAG 0x04 /* True after initial configuration */ 302 #define CFG_DONE_MASK (IB_CFG_DONE | OB_CFG_DONE) 303 304 uint8_t config_done; /* Configuration flag word */ 305 uint8_t local_id; /* Transaction ID for local trans */ 306 uint8_t remote_id; /* Transaction ID for local */ 307 308 #define CCB_FLAG_NO_RETRY 0x01 /* no more retry */ 309 #define CCB_FLAG_SENT_PENDING 0x02 /* already sent pending response */ 310 uint8_t flags; 311 312 tL2CAP_CFG_INFO our_cfg; /* Our saved configuration options */ 313 tL2CAP_CH_CFG_BITS peer_cfg_bits; /* Store what peer wants to configure */ 314 tL2CAP_CFG_INFO peer_cfg; /* Peer's saved configuration options */ 315 316 fixed_queue_t* xmit_hold_q; /* Transmit data hold queue */ 317 bool cong_sent; /* Set when congested status sent */ 318 uint16_t buff_quota; /* Buffer quota before sending congestion */ 319 320 tL2CAP_CHNL_PRIORITY ccb_priority; /* Channel priority */ 321 tL2CAP_CHNL_DATA_RATE tx_data_rate; /* Channel Tx data rate */ 322 tL2CAP_CHNL_DATA_RATE rx_data_rate; /* Channel Rx data rate */ 323 324 /* Fields used for eL2CAP */ 325 tL2CAP_ERTM_INFO ertm_info; 326 tL2C_FCRB fcrb; 327 uint16_t tx_mps; /* TX MPS adjusted based on current controller */ 328 uint16_t max_rx_mtu; 329 uint8_t fcr_cfg_tries; /* Max number of negotiation attempts */ 330 bool peer_cfg_already_rejected; /* If mode rejected once, set to true */ 331 bool out_cfg_fcr_present; /* true if cfg response shoulkd include fcr options 332 */ 333 334 #define L2CAP_CFG_FCS_OUR 0x01 /* Our desired config FCS option */ 335 #define L2CAP_CFG_FCS_PEER 0x02 /* Peer's desired config FCS option */ 336 #define L2CAP_BYPASS_FCS (L2CAP_CFG_FCS_OUR | L2CAP_CFG_FCS_PEER) 337 uint8_t bypass_fcs; 338 339 #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) 340 bool is_flushable; /* true if channel is flushable */ 341 #endif 342 343 #if (L2CAP_NUM_FIXED_CHNLS > 0 || L2CAP_UCD_INCLUDED == TRUE) 344 uint16_t fixed_chnl_idle_tout; /* Idle timeout to use for the fixed channel */ 345 #endif 346 uint16_t tx_data_len; 347 } tL2C_CCB; 348 349 /*********************************************************************** 350 * Define a queue of linked CCBs. 351 */ 352 typedef struct { 353 tL2C_CCB* p_first_ccb; /* The first channel in this queue */ 354 tL2C_CCB* p_last_ccb; /* The last channel in this queue */ 355 } tL2C_CCB_Q; 356 357 #if (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE) 358 359 /* Round-Robin service for the same priority channels */ 360 #define L2CAP_NUM_CHNL_PRIORITY \ 361 3 /* Total number of priority group (high, medium, low)*/ 362 #define L2CAP_CHNL_PRIORITY_WEIGHT \ 363 5 /* weight per priority for burst transmission quota */ 364 #define L2CAP_GET_PRIORITY_QUOTA(pri) \ 365 ((L2CAP_NUM_CHNL_PRIORITY - (pri)) * L2CAP_CHNL_PRIORITY_WEIGHT) 366 367 /* CCBs within the same LCB are served in round robin with priority It will make 368 * sure that low priority channel (for example, HF signaling on RFCOMM) can be 369 * sent to the headset even if higher priority channel (for example, AV media 370 * channel) is congested. 371 */ 372 373 typedef struct { 374 tL2C_CCB* p_serve_ccb; /* current serving ccb within priority group */ 375 tL2C_CCB* p_first_ccb; /* first ccb of priority group */ 376 uint8_t num_ccb; /* number of channels in priority group */ 377 uint8_t quota; /* burst transmission quota */ 378 } tL2C_RR_SERV; 379 380 #endif /* (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE) */ 381 382 /* Define a link control block. There is one link control block between 383 * this device and any other device (i.e. BD ADDR). 384 */ 385 typedef struct t_l2c_linkcb { 386 bool in_use; /* true when in use, false when not */ 387 tL2C_LINK_STATE link_state; 388 389 alarm_t* l2c_lcb_timer; /* Timer entry for timeout evt */ 390 uint16_t handle; /* The handle used with LM */ 391 392 tL2C_CCB_Q ccb_queue; /* Queue of CCBs on this LCB */ 393 394 tL2C_CCB* p_pending_ccb; /* ccb of waiting channel during link disconnect */ 395 alarm_t* info_resp_timer; /* Timer entry for info resp timeout evt */ 396 RawAddress remote_bd_addr; /* The BD address of the remote */ 397 398 uint8_t link_role; /* Master or slave */ 399 uint8_t id; 400 uint8_t cur_echo_id; /* Current id value for echo request */ 401 tL2CA_ECHO_RSP_CB* p_echo_rsp_cb; /* Echo response callback */ 402 uint16_t idle_timeout; /* Idle timeout */ 403 bool is_bonding; /* True - link active only for bonding */ 404 405 uint16_t link_flush_tout; /* Flush timeout used */ 406 407 uint16_t link_xmit_quota; /* Num outstanding pkts allowed */ 408 uint16_t sent_not_acked; /* Num packets sent but not acked */ 409 410 bool partial_segment_being_sent; /* Set true when a partial segment */ 411 /* is being sent. */ 412 bool w4_info_rsp; /* true when info request is active */ 413 uint8_t info_rx_bits; /* set 1 if received info type */ 414 uint32_t peer_ext_fea; /* Peer's extended features mask */ 415 list_t* link_xmit_data_q; /* Link transmit data buffer queue */ 416 417 uint8_t peer_chnl_mask[L2CAP_FIXED_CHNL_ARRAY_SIZE]; 418 #if (L2CAP_UCD_INCLUDED == TRUE) 419 uint16_t ucd_mtu; /* peer MTU on UCD */ 420 fixed_queue_t* 421 ucd_out_sec_pending_q; /* Security pending outgoing UCD packet */ 422 fixed_queue_t* 423 ucd_in_sec_pending_q; /* Security pending incoming UCD packet */ 424 #endif 425 426 BT_HDR* p_hcit_rcv_acl; /* Current HCIT ACL buf being rcvd */ 427 uint16_t idle_timeout_sv; /* Save current Idle timeout */ 428 uint8_t acl_priority; /* L2C_PRIORITY_NORMAL or L2C_PRIORITY_HIGH */ 429 tL2CA_NOCP_CB* p_nocp_cb; /* Num Cmpl pkts callback */ 430 431 #if (L2CAP_NUM_FIXED_CHNLS > 0) 432 tL2C_CCB* p_fixed_ccbs[L2CAP_NUM_FIXED_CHNLS]; 433 uint16_t disc_reason; 434 #endif 435 436 tBT_TRANSPORT transport; 437 uint8_t initiating_phys; // LE PHY used for connection initiation 438 tBLE_ADDR_TYPE ble_addr_type; 439 uint16_t tx_data_len; /* tx data length used in data length extension */ 440 fixed_queue_t* le_sec_pending_q; /* LE coc channels waiting for security check 441 completion */ 442 uint8_t sec_act; 443 #define L2C_BLE_CONN_UPDATE_DISABLE \ 444 0x1 /* disable update connection parameters */ 445 #define L2C_BLE_NEW_CONN_PARAM 0x2 /* new connection parameter to be set */ 446 #define L2C_BLE_UPDATE_PENDING \ 447 0x4 /* waiting for connection update finished \ 448 */ 449 #define L2C_BLE_NOT_DEFAULT_PARAM \ 450 0x8 /* not using default connection parameters */ 451 uint8_t conn_update_mask; 452 453 uint16_t min_interval; /* parameters as requested by peripheral */ 454 uint16_t max_interval; 455 uint16_t latency; 456 uint16_t timeout; 457 458 #if (L2CAP_ROUND_ROBIN_CHANNEL_SERVICE == TRUE) 459 /* each priority group is limited burst transmission */ 460 /* round robin service for the same priority channels */ 461 tL2C_RR_SERV rr_serv[L2CAP_NUM_CHNL_PRIORITY]; 462 uint8_t rr_pri; /* current serving priority group */ 463 #endif 464 465 } tL2C_LCB; 466 467 /* Define the L2CAP control structure 468 */ 469 typedef struct { 470 uint8_t l2cap_trace_level; 471 uint16_t controller_xmit_window; /* Total ACL window for all links */ 472 473 uint16_t round_robin_quota; /* Round-robin link quota */ 474 uint16_t round_robin_unacked; /* Round-robin unacked */ 475 bool check_round_robin; /* Do a round robin check */ 476 477 bool is_cong_cback_context; 478 479 tL2C_LCB lcb_pool[MAX_L2CAP_LINKS]; /* Link Control Block pool */ 480 tL2C_CCB ccb_pool[MAX_L2CAP_CHANNELS]; /* Channel Control Block pool */ 481 tL2C_RCB rcb_pool[MAX_L2CAP_CLIENTS]; /* Registration info pool */ 482 483 tL2C_CCB* p_free_ccb_first; /* Pointer to first free CCB */ 484 tL2C_CCB* p_free_ccb_last; /* Pointer to last free CCB */ 485 486 uint8_t 487 desire_role; /* desire to be master/slave when accepting a connection */ 488 bool disallow_switch; /* false, to allow switch at create conn */ 489 uint16_t num_lm_acl_bufs; /* # of ACL buffers on controller */ 490 uint16_t idle_timeout; /* Idle timeout */ 491 492 list_t* rcv_pending_q; /* Recv pending queue */ 493 alarm_t* receive_hold_timer; /* Timer entry for rcv hold */ 494 495 tL2C_LCB* p_cur_hcit_lcb; /* Current HCI Transport buffer */ 496 uint16_t num_links_active; /* Number of links active */ 497 498 #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) 499 uint16_t non_flushable_pbf; /* L2CAP_PKT_START_NON_FLUSHABLE if controller 500 supports */ 501 /* Otherwise, L2CAP_PKT_START */ 502 bool is_flush_active; /* true if an HCI_Enhanced_Flush has been sent */ 503 #endif 504 505 #if (L2CAP_CONFORMANCE_TESTING == TRUE) 506 uint32_t test_info_resp; /* Conformance testing needs a dynamic response */ 507 #endif 508 509 #if (L2CAP_NUM_FIXED_CHNLS > 0) 510 tL2CAP_FIXED_CHNL_REG 511 fixed_reg[L2CAP_NUM_FIXED_CHNLS]; /* Reg info for fixed channels */ 512 #endif 513 514 uint16_t num_ble_links_active; /* Number of LE links active */ 515 bool is_ble_connecting; 516 RawAddress ble_connecting_bda; 517 uint16_t controller_le_xmit_window; /* Total ACL window for all links */ 518 tL2C_BLE_FIXED_CHNLS_MASK l2c_ble_fixed_chnls_mask; // LE fixed channels mask 519 uint16_t num_lm_ble_bufs; /* # of ACL buffers on controller */ 520 uint16_t ble_round_robin_quota; /* Round-robin link quota */ 521 uint16_t ble_round_robin_unacked; /* Round-robin unacked */ 522 bool ble_check_round_robin; /* Do a round robin check */ 523 tL2C_RCB ble_rcb_pool[BLE_MAX_L2CAP_CLIENTS]; /* Registration info pool */ 524 525 tL2CA_ECHO_DATA_CB* p_echo_data_cb; /* Echo data callback */ 526 527 #if (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == TRUE) 528 uint16_t high_pri_min_xmit_quota; /* Minimum number of ACL credit for high 529 priority link */ 530 #endif /* (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == TRUE) */ 531 532 uint16_t dyn_psm; 533 } tL2C_CB; 534 535 /* Define a structure that contains the information about a connection. 536 * This structure is used to pass between functions, and not all the 537 * fields will always be filled in. 538 */ 539 typedef struct { 540 RawAddress bd_addr; /* Remote BD address */ 541 uint8_t status; /* Connection status */ 542 uint16_t psm; /* PSM of the connection */ 543 uint16_t l2cap_result; /* L2CAP result */ 544 uint16_t l2cap_status; /* L2CAP status */ 545 uint16_t remote_cid; /* Remote CID */ 546 } tL2C_CONN_INFO; 547 548 typedef void(tL2C_FCR_MGMT_EVT_HDLR)(uint8_t, tL2C_CCB*); 549 550 /* Necessary info for postponed TX completion callback 551 */ 552 typedef struct { 553 uint16_t local_cid; 554 uint16_t num_sdu; 555 tL2CA_TX_COMPLETE_CB* cb; 556 } tL2C_TX_COMPLETE_CB_INFO; 557 558 /* The offset in a buffer that L2CAP will use when building commands. 559 */ 560 #define L2CAP_SEND_CMD_OFFSET 0 561 562 /* Number of ACL buffers to use for high priority channel 563 */ 564 #if (L2CAP_HIGH_PRI_CHAN_QUOTA_IS_CONFIGURABLE == FALSE) 565 #define L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A (L2CAP_HIGH_PRI_MIN_XMIT_QUOTA) 566 #else 567 #define L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A (l2cb.high_pri_min_xmit_quota) 568 #endif 569 570 /* L2CAP global data 571 *********************************** 572 */ 573 extern tL2C_CB l2cb; 574 575 /* Functions provided by l2c_main.cc 576 *********************************** 577 */ 578 void l2c_init(void); 579 void l2c_free(void); 580 581 extern void l2c_receive_hold_timer_timeout(void* data); 582 extern void l2c_ccb_timer_timeout(void* data); 583 extern void l2c_lcb_timer_timeout(void* data); 584 extern void l2c_fcrb_ack_timer_timeout(void* data); 585 extern uint8_t l2c_data_write(uint16_t cid, BT_HDR* p_data, uint16_t flag); 586 extern void l2c_rcv_acl_data(BT_HDR* p_msg); 587 extern void l2c_process_held_packets(bool timed_out); 588 589 /* Functions provided by l2c_utils.cc 590 *********************************** 591 */ 592 extern bool l2cu_can_allocate_lcb(void); 593 extern tL2C_LCB* l2cu_allocate_lcb(const RawAddress& p_bd_addr, bool is_bonding, 594 tBT_TRANSPORT transport); 595 extern bool l2cu_start_post_bond_timer(uint16_t handle); 596 extern void l2cu_release_lcb(tL2C_LCB* p_lcb); 597 extern tL2C_LCB* l2cu_find_lcb_by_bd_addr(const RawAddress& p_bd_addr, 598 tBT_TRANSPORT transport); 599 extern tL2C_LCB* l2cu_find_lcb_by_handle(uint16_t handle); 600 extern void l2cu_update_lcb_4_bonding(const RawAddress& p_bd_addr, 601 bool is_bonding); 602 603 extern uint8_t l2cu_get_conn_role(tL2C_LCB* p_this_lcb); 604 extern bool l2cu_set_acl_priority(const RawAddress& bd_addr, uint8_t priority, 605 bool reset_after_rs); 606 607 extern void l2cu_enqueue_ccb(tL2C_CCB* p_ccb); 608 extern void l2cu_dequeue_ccb(tL2C_CCB* p_ccb); 609 extern void l2cu_change_pri_ccb(tL2C_CCB* p_ccb, tL2CAP_CHNL_PRIORITY priority); 610 611 extern tL2C_CCB* l2cu_allocate_ccb(tL2C_LCB* p_lcb, uint16_t cid); 612 extern void l2cu_release_ccb(tL2C_CCB* p_ccb); 613 extern tL2C_CCB* l2cu_find_ccb_by_cid(tL2C_LCB* p_lcb, uint16_t local_cid); 614 extern tL2C_CCB* l2cu_find_ccb_by_remote_cid(tL2C_LCB* p_lcb, 615 uint16_t remote_cid); 616 extern void l2cu_adj_id(tL2C_LCB* p_lcb, uint8_t adj_mask); 617 extern bool l2c_is_cmd_rejected(uint8_t cmd_code, uint8_t id, tL2C_LCB* p_lcb); 618 619 extern void l2cu_send_peer_cmd_reject(tL2C_LCB* p_lcb, uint16_t reason, 620 uint8_t rem_id, uint16_t p1, uint16_t p2); 621 extern void l2cu_send_peer_connect_req(tL2C_CCB* p_ccb); 622 extern void l2cu_send_peer_connect_rsp(tL2C_CCB* p_ccb, uint16_t result, 623 uint16_t status); 624 extern void l2cu_send_peer_config_req(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 625 extern void l2cu_send_peer_config_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 626 extern void l2cu_send_peer_config_rej(tL2C_CCB* p_ccb, uint8_t* p_data, 627 uint16_t data_len, uint16_t rej_len); 628 extern void l2cu_send_peer_disc_req(tL2C_CCB* p_ccb); 629 extern void l2cu_send_peer_disc_rsp(tL2C_LCB* p_lcb, uint8_t remote_id, 630 uint16_t local_cid, uint16_t remote_cid); 631 extern void l2cu_send_peer_echo_req(tL2C_LCB* p_lcb, uint8_t* p_data, 632 uint16_t data_len); 633 extern void l2cu_send_peer_echo_rsp(tL2C_LCB* p_lcb, uint8_t id, 634 uint8_t* p_data, uint16_t data_len); 635 extern void l2cu_send_peer_info_rsp(tL2C_LCB* p_lcb, uint8_t id, 636 uint16_t info_type); 637 extern void l2cu_reject_connection(tL2C_LCB* p_lcb, uint16_t remote_cid, 638 uint8_t rem_id, uint16_t result); 639 extern void l2cu_send_peer_info_req(tL2C_LCB* p_lcb, uint16_t info_type); 640 extern void l2cu_set_acl_hci_header(BT_HDR* p_buf, tL2C_CCB* p_ccb); 641 extern void l2cu_check_channel_congestion(tL2C_CCB* p_ccb); 642 extern void l2cu_disconnect_chnl(tL2C_CCB* p_ccb); 643 644 extern void l2cu_tx_complete(tL2C_TX_COMPLETE_CB_INFO* p_cbi); 645 646 #if (L2CAP_NON_FLUSHABLE_PB_INCLUDED == TRUE) 647 extern void l2cu_set_non_flushable_pbf(bool); 648 #endif 649 650 extern void l2cu_send_peer_ble_par_req(tL2C_LCB* p_lcb, uint16_t min_int, 651 uint16_t max_int, uint16_t latency, 652 uint16_t timeout); 653 extern void l2cu_send_peer_ble_par_rsp(tL2C_LCB* p_lcb, uint16_t reason, 654 uint8_t rem_id); 655 extern void l2cu_reject_ble_connection(tL2C_LCB* p_lcb, uint8_t rem_id, 656 uint16_t result); 657 extern void l2cu_send_peer_ble_credit_based_conn_res(tL2C_CCB* p_ccb, 658 uint16_t result); 659 extern void l2cu_send_peer_ble_credit_based_conn_req(tL2C_CCB* p_ccb); 660 extern void l2cu_send_peer_ble_flow_control_credit(tL2C_CCB* p_ccb, 661 uint16_t credit_value); 662 extern void l2cu_send_peer_ble_credit_based_disconn_req(tL2C_CCB* p_ccb); 663 664 extern bool l2cu_initialize_fixed_ccb(tL2C_LCB* p_lcb, uint16_t fixed_cid, 665 tL2CAP_FCR_OPTS* p_fcr); 666 extern void l2cu_no_dynamic_ccbs(tL2C_LCB* p_lcb); 667 extern void l2cu_process_fixed_chnl_resp(tL2C_LCB* p_lcb); 668 extern bool l2cu_is_ccb_active(tL2C_CCB* p_ccb); 669 670 /* Functions provided by l2c_ucd.cc 671 *********************************** 672 */ 673 #if (L2CAP_UCD_INCLUDED == TRUE) 674 void l2c_ucd_delete_sec_pending_q(tL2C_LCB* p_lcb); 675 void l2c_ucd_enqueue_pending_out_sec_q(tL2C_CCB* p_ccb, void* p_data); 676 bool l2c_ucd_check_pending_info_req(tL2C_CCB* p_ccb); 677 bool l2c_ucd_check_pending_out_sec_q(tL2C_CCB* p_ccb); 678 void l2c_ucd_send_pending_out_sec_q(tL2C_CCB* p_ccb); 679 void l2c_ucd_discard_pending_out_sec_q(tL2C_CCB* p_ccb); 680 bool l2c_ucd_check_pending_in_sec_q(tL2C_CCB* p_ccb); 681 void l2c_ucd_send_pending_in_sec_q(tL2C_CCB* p_ccb); 682 void l2c_ucd_discard_pending_in_sec_q(tL2C_CCB* p_ccb); 683 bool l2c_ucd_check_rx_pkts(tL2C_LCB* p_lcb, BT_HDR* p_msg); 684 bool l2c_ucd_process_event(tL2C_CCB* p_ccb, uint16_t event, void* p_data); 685 #endif 686 687 /* Functions provided for Broadcom Aware 688 *************************************** 689 */ 690 extern bool l2cu_check_feature_req(tL2C_LCB* p_lcb, uint8_t id, uint8_t* p_data, 691 uint16_t data_len); 692 extern void l2cu_check_feature_rsp(tL2C_LCB* p_lcb, uint8_t id, uint8_t* p_data, 693 uint16_t data_len); 694 extern void l2cu_send_feature_req(tL2C_CCB* p_ccb); 695 696 extern tL2C_RCB* l2cu_allocate_rcb(uint16_t psm); 697 extern tL2C_RCB* l2cu_find_rcb_by_psm(uint16_t psm); 698 extern void l2cu_release_rcb(tL2C_RCB* p_rcb); 699 extern tL2C_RCB* l2cu_allocate_ble_rcb(uint16_t psm); 700 extern tL2C_RCB* l2cu_find_ble_rcb_by_psm(uint16_t psm); 701 702 extern uint8_t l2cu_process_peer_cfg_req(tL2C_CCB* p_ccb, 703 tL2CAP_CFG_INFO* p_cfg); 704 extern void l2cu_process_peer_cfg_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 705 extern void l2cu_process_our_cfg_req(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 706 extern void l2cu_process_our_cfg_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 707 708 extern void l2cu_device_reset(void); 709 extern tL2C_LCB* l2cu_find_lcb_by_state(tL2C_LINK_STATE state); 710 extern bool l2cu_lcb_disconnecting(void); 711 712 extern bool l2cu_create_conn(tL2C_LCB* p_lcb, tBT_TRANSPORT transport); 713 extern bool l2cu_create_conn(tL2C_LCB* p_lcb, tBT_TRANSPORT transport, 714 uint8_t initiating_phys); 715 extern bool l2cu_create_conn_after_switch(tL2C_LCB* p_lcb); 716 extern BT_HDR* l2cu_get_next_buffer_to_send(tL2C_LCB* p_lcb, 717 tL2C_TX_COMPLETE_CB_INFO* p_cbi); 718 extern void l2cu_resubmit_pending_sec_req(const RawAddress* p_bda); 719 extern void l2cu_initialize_amp_ccb(tL2C_LCB* p_lcb); 720 extern void l2cu_adjust_out_mps(tL2C_CCB* p_ccb); 721 722 /* Functions provided by l2c_link.cc 723 *********************************** 724 */ 725 extern bool l2c_link_hci_conn_req(const RawAddress& bd_addr); 726 extern bool l2c_link_hci_conn_comp(uint8_t status, uint16_t handle, 727 const RawAddress& p_bda); 728 extern bool l2c_link_hci_disc_comp(uint16_t handle, uint8_t reason); 729 extern bool l2c_link_hci_qos_violation(uint16_t handle); 730 extern void l2c_link_timeout(tL2C_LCB* p_lcb); 731 extern void l2c_info_resp_timer_timeout(void* data); 732 extern void l2c_link_check_send_pkts(tL2C_LCB* p_lcb, tL2C_CCB* p_ccb, 733 BT_HDR* p_buf); 734 extern void l2c_link_adjust_allocation(void); 735 extern void l2c_link_process_num_completed_pkts(uint8_t* p); 736 extern void l2c_link_process_num_completed_blocks(uint8_t controller_id, 737 uint8_t* p, uint16_t evt_len); 738 extern void l2c_link_processs_num_bufs(uint16_t num_lm_acl_bufs); 739 extern uint8_t l2c_link_pkts_rcvd(uint16_t* num_pkts, uint16_t* handles); 740 extern void l2c_link_role_changed(const RawAddress* bd_addr, uint8_t new_role, 741 uint8_t hci_status); 742 extern void l2c_link_sec_comp(const RawAddress* p_bda, tBT_TRANSPORT trasnport, 743 void* p_ref_data, uint8_t status); 744 extern void l2c_link_sec_comp2(const RawAddress& p_bda, tBT_TRANSPORT trasnport, 745 void* p_ref_data, uint8_t status); 746 extern void l2c_link_segments_xmitted(BT_HDR* p_msg); 747 extern void l2c_pin_code_request(const RawAddress& bd_addr); 748 extern void l2c_link_adjust_chnl_allocation(void); 749 750 extern void l2c_link_processs_ble_num_bufs(uint16_t num_lm_acl_bufs); 751 752 #if (L2CAP_WAKE_PARKED_LINK == TRUE) 753 extern bool l2c_link_check_power_mode(tL2C_LCB* p_lcb); 754 #define L2C_LINK_CHECK_POWER_MODE(x) l2c_link_check_power_mode((x)) 755 #else // L2CAP_WAKE_PARKED_LINK 756 #define L2C_LINK_CHECK_POWER_MODE(x) (false) 757 #endif // L2CAP_WAKE_PARKED_LINK 758 759 #if (L2CAP_CONFORMANCE_TESTING == TRUE) 760 /* Used only for conformance testing */ 761 extern void l2cu_set_info_rsp_mask(uint32_t mask); 762 #endif 763 764 /* Functions provided by l2c_csm.cc 765 *********************************** 766 */ 767 extern void l2c_csm_execute(tL2C_CCB* p_ccb, uint16_t event, void* p_data); 768 769 extern void l2c_enqueue_peer_data(tL2C_CCB* p_ccb, BT_HDR* p_buf); 770 771 /* Functions provided by l2c_fcr.cc 772 *********************************** 773 */ 774 extern void l2c_fcr_cleanup(tL2C_CCB* p_ccb); 775 extern void l2c_fcr_proc_pdu(tL2C_CCB* p_ccb, BT_HDR* p_buf); 776 extern void l2c_fcr_proc_tout(tL2C_CCB* p_ccb); 777 extern void l2c_fcr_proc_ack_tout(tL2C_CCB* p_ccb); 778 extern void l2c_fcr_send_S_frame(tL2C_CCB* p_ccb, uint16_t function_code, 779 uint16_t pf_bit); 780 extern BT_HDR* l2c_fcr_clone_buf(BT_HDR* p_buf, uint16_t new_offset, 781 uint16_t no_of_bytes); 782 extern bool l2c_fcr_is_flow_controlled(tL2C_CCB* p_ccb); 783 extern BT_HDR* l2c_fcr_get_next_xmit_sdu_seg(tL2C_CCB* p_ccb, 784 uint16_t max_packet_length); 785 extern void l2c_fcr_start_timer(tL2C_CCB* p_ccb); 786 extern void l2c_lcc_proc_pdu(tL2C_CCB* p_ccb, BT_HDR* p_buf); 787 extern BT_HDR* l2c_lcc_get_next_xmit_sdu_seg(tL2C_CCB* p_ccb, 788 uint16_t max_packet_length); 789 790 /* Configuration negotiation */ 791 extern uint8_t l2c_fcr_chk_chan_modes(tL2C_CCB* p_ccb); 792 extern bool l2c_fcr_adj_our_req_options(tL2C_CCB* p_ccb, 793 tL2CAP_CFG_INFO* p_cfg); 794 extern void l2c_fcr_adj_our_rsp_options(tL2C_CCB* p_ccb, 795 tL2CAP_CFG_INFO* p_peer_cfg); 796 extern bool l2c_fcr_renegotiate_chan(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg); 797 extern uint8_t l2c_fcr_process_peer_cfg_req(tL2C_CCB* p_ccb, 798 tL2CAP_CFG_INFO* p_cfg); 799 extern void l2c_fcr_adj_monitor_retran_timeout(tL2C_CCB* p_ccb); 800 extern void l2c_fcr_stop_timer(tL2C_CCB* p_ccb); 801 802 /* Functions provided by l2c_ble.cc 803 *********************************** 804 */ 805 extern bool l2cble_create_conn(tL2C_LCB* p_lcb); 806 extern void l2cble_process_sig_cmd(tL2C_LCB* p_lcb, uint8_t* p, 807 uint16_t pkt_len); 808 extern void l2cble_conn_comp(uint16_t handle, uint8_t role, 809 const RawAddress& bda, tBLE_ADDR_TYPE type, 810 uint16_t conn_interval, uint16_t conn_latency, 811 uint16_t conn_timeout); 812 extern bool l2cble_init_direct_conn(tL2C_LCB* p_lcb); 813 extern void l2cble_notify_le_connection(const RawAddress& bda); 814 extern void l2c_ble_link_adjust_allocation(void); 815 extern void l2cble_process_conn_update_evt(uint16_t handle, uint8_t status, 816 uint16_t interval, uint16_t latency, 817 uint16_t timeout); 818 819 extern void l2cble_credit_based_conn_req(tL2C_CCB* p_ccb); 820 extern void l2cble_credit_based_conn_res(tL2C_CCB* p_ccb, uint16_t result); 821 extern void l2cble_send_peer_disc_req(tL2C_CCB* p_ccb); 822 extern void l2cble_send_flow_control_credit(tL2C_CCB* p_ccb, 823 uint16_t credit_value); 824 extern bool l2ble_sec_access_req(const RawAddress& bd_addr, uint16_t psm, 825 bool is_originator, 826 tL2CAP_SEC_CBACK* p_callback, 827 void* p_ref_data); 828 829 #if (BLE_LLT_INCLUDED == TRUE) 830 extern void l2cble_process_rc_param_request_evt(uint16_t handle, 831 uint16_t int_min, 832 uint16_t int_max, 833 uint16_t latency, 834 uint16_t timeout); 835 #endif 836 837 extern void l2cble_update_data_length(tL2C_LCB* p_lcb); 838 extern void l2cble_set_fixed_channel_tx_data_length( 839 const RawAddress& remote_bda, uint16_t fix_cid, uint16_t tx_mtu); 840 extern void l2cble_process_data_length_change_event(uint16_t handle, 841 uint16_t tx_data_len, 842 uint16_t rx_data_len); 843 844 extern void l2cu_process_fixed_disc_cback(tL2C_LCB* p_lcb); 845 846 #endif 847