1 /****************************************************************************** 2 * 3 * Copyright (C) 2010-2014 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 LLCP internal definitions 22 * 23 ******************************************************************************/ 24 #ifndef LLCP_INT_H 25 #define LLCP_INT_H 26 27 #include "llcp_api.h" 28 #include "nfc_api.h" 29 30 /* 31 ** LLCP link states 32 */ 33 enum { 34 LLCP_LINK_STATE_DEACTIVATED, /* llcp link is deactivated */ 35 LLCP_LINK_STATE_ACTIVATED, /* llcp link has been activated */ 36 LLCP_LINK_STATE_DEACTIVATING, /* llcp link is deactivating */ 37 LLCP_LINK_STATE_ACTIVATION_FAILED /* llcp link activation was failed */ 38 }; 39 typedef uint8_t tLLCP_LINK_STATE; 40 41 /* 42 ** LLCP Symmetric state 43 */ 44 45 #define LLCP_LINK_SYMM_LOCAL_XMIT_NEXT 0 46 #define LLCP_LINK_SYMM_REMOTE_XMIT_NEXT 1 47 48 /* 49 ** LLCP internal flags 50 */ 51 /* Received any LLC PDU in activated state */ 52 #define LLCP_LINK_FLAGS_RX_ANY_LLC_PDU 0x01 53 54 /* 55 ** LLCP link control block 56 */ 57 typedef struct { 58 tLLCP_LINK_STATE link_state; /* llcp link state */ 59 tLLCP_LINK_CBACK* 60 p_link_cback; /* callback function to report llcp link status */ 61 uint16_t wks; /* well-known service bit-map */ 62 63 bool is_initiator; /* TRUE if initiator role */ 64 bool is_sending_data; /* TRUE if llcp_link_check_send_data() is excuting */ 65 uint8_t flags; /* LLCP internal flags */ 66 bool received_first_packet; /* TRUE if a packet has been received from remote 67 */ 68 uint8_t agreed_major_version; /* llcp major version used in activated state */ 69 uint8_t agreed_minor_version; /* llcp minor version used in activated state */ 70 71 uint8_t peer_version; /* llcp version of peer device */ 72 uint16_t peer_miu; /* link MIU of peer device */ 73 uint16_t peer_wks; /* WKS of peer device */ 74 uint16_t peer_lto; /* link timeout of peer device in ms */ 75 uint8_t peer_opt; /* Option field of peer device */ 76 uint16_t effective_miu; /* MIU to send PDU in activated state */ 77 78 TIMER_LIST_ENT timer; /* link timer for LTO and SYMM response */ 79 uint8_t symm_state; /* state of symmectric procedure */ 80 bool ll_served; /* TRUE if last transmisstion was for UI */ 81 uint8_t ll_idx; /* for scheduler of logical link connection */ 82 uint8_t dl_idx; /* for scheduler of data link connection */ 83 84 TIMER_LIST_ENT inact_timer; /* inactivity timer */ 85 uint16_t inact_timeout; /* inactivity timeout in ms */ 86 87 uint8_t link_deact_reason; /* reason of LLCP link deactivated */ 88 89 BUFFER_Q sig_xmit_q; /* tx signaling PDU queue */ 90 91 /* runtime configuration parameters */ 92 uint16_t local_link_miu; /* Maximum Information Unit */ 93 uint8_t local_opt; /* Option parameter */ 94 uint8_t local_wt; /* Response Waiting Time Index */ 95 uint16_t local_lto; /* Local Link Timeout */ 96 uint16_t inact_timeout_init; /* Inactivity Timeout as initiator role */ 97 uint16_t inact_timeout_target; /* Inactivity Timeout as target role */ 98 uint16_t symm_delay; /* Delay SYMM response */ 99 uint16_t data_link_timeout; /* data link conneciton timeout */ 100 uint16_t delay_first_pdu_timeout; /* delay timeout to send first PDU as 101 initiator */ 102 103 } tLLCP_LCB; 104 105 /* 106 ** LLCP Application's registration control block on service access point (SAP) 107 */ 108 109 typedef struct { 110 uint8_t link_type; /* logical link and/or data link */ 111 char* p_service_name; /* GKI buffer containing service name */ 112 tLLCP_APP_CBACK* p_app_cback; /* application's callback pointer */ 113 114 BUFFER_Q ui_xmit_q; /* UI PDU queue for transmitting */ 115 BUFFER_Q ui_rx_q; /* UI PDU queue for receiving */ 116 bool is_ui_tx_congested; /* TRUE if transmitting UI PDU is congested */ 117 118 } tLLCP_APP_CB; 119 120 /* 121 ** LLCP data link connection states 122 */ 123 enum { 124 LLCP_DLC_STATE_IDLE, /* initial state */ 125 LLCP_DLC_STATE_W4_REMOTE_RESP, /* waiting for connection confirm from peer */ 126 LLCP_DLC_STATE_W4_LOCAL_RESP, /* waiting for connection confirm from upper 127 layer */ 128 LLCP_DLC_STATE_CONNECTED, /* data link connection has been established */ 129 LLCP_DLC_STATE_W4_REMOTE_DM /* waiting for disconnection confirm from peer */ 130 }; 131 typedef uint8_t tLLCP_DLC_STATE; 132 133 /* 134 ** LLCP data link connection events 135 */ 136 enum { 137 LLCP_DLC_EVENT_API_CONNECT_REQ, /* connection request from upper layer */ 138 LLCP_DLC_EVENT_API_CONNECT_CFM, /* connection confirm from upper layer */ 139 LLCP_DLC_EVENT_API_CONNECT_REJECT, /* connection reject from upper layer */ 140 LLCP_DLC_EVENT_PEER_CONNECT_IND, /* connection request from peer */ 141 LLCP_DLC_EVENT_PEER_CONNECT_CFM, /* connection confirm from peer */ 142 143 LLCP_DLC_EVENT_API_DATA_REQ, /* data packet from upper layer */ 144 LLCP_DLC_EVENT_PEER_DATA_IND, /* data packet from peer */ 145 146 LLCP_DLC_EVENT_API_DISCONNECT_REQ, /* disconnect request from upper layer */ 147 LLCP_DLC_EVENT_PEER_DISCONNECT_IND, /* disconnect request from peer */ 148 LLCP_DLC_EVENT_PEER_DISCONNECT_RESP, /* disconnect response from peer */ 149 150 LLCP_DLC_EVENT_FRAME_ERROR, /* received erroneous frame from peer */ 151 LLCP_DLC_EVENT_LINK_ERROR, /* llcp link has been deactivated */ 152 153 LLCP_DLC_EVENT_TIMEOUT /* timeout event */ 154 }; 155 typedef uint8_t tLLCP_DLC_EVENT; 156 157 /* 158 ** LLCP data link connection control block 159 */ 160 161 /* send DISC when tx queue is empty */ 162 #define LLCP_DATA_LINK_FLAG_PENDING_DISC 0x01 163 /* send RR/RNR with valid sequence */ 164 #define LLCP_DATA_LINK_FLAG_PENDING_RR_RNR 0x02 165 /* notify upper later when tx complete */ 166 #define LLCP_DATA_LINK_FLAG_NOTIFY_TX_DONE 0x04 167 168 typedef struct { 169 tLLCP_DLC_STATE state; /* data link connection state */ 170 uint8_t flags; /* specific action flags */ 171 tLLCP_APP_CB* p_app_cb; /* pointer of application registration */ 172 TIMER_LIST_ENT timer; /* timer for connection complete */ 173 174 uint8_t local_sap; /* SAP of local end point */ 175 uint16_t local_miu; /* MIU of local SAP */ 176 uint8_t local_rw; /* RW of local SAP */ 177 bool local_busy; /* TRUE if local SAP is busy */ 178 179 uint8_t remote_sap; /* SAP of remote end point */ 180 uint16_t remote_miu; /* MIU of remote SAP */ 181 uint8_t remote_rw; /* RW of remote SAP */ 182 bool remote_busy; /* TRUE if remote SAP is busy */ 183 184 uint8_t next_tx_seq; /* V(S), send state variable */ 185 uint8_t rcvd_ack_seq; /* V(SA), send ack state variable */ 186 uint8_t next_rx_seq; /* V(R), receive state variable */ 187 uint8_t sent_ack_seq; /* V(RA), receive ack state variable */ 188 189 BUFFER_Q i_xmit_q; /* tx queue of I PDU */ 190 bool is_tx_congested; /* TRUE if tx I PDU is congested */ 191 192 BUFFER_Q i_rx_q; /* rx queue of I PDU */ 193 bool is_rx_congested; /* TRUE if rx I PDU is congested */ 194 uint8_t num_rx_i_pdu; /* number of I PDU in rx queue */ 195 uint8_t rx_congest_threshold; /* dynamic congest threshold for rx I PDU */ 196 197 } tLLCP_DLCB; 198 199 /* 200 ** LLCP service discovery control block 201 */ 202 203 typedef struct { 204 uint8_t tid; /* transaction ID */ 205 tLLCP_SDP_CBACK* p_cback; /* callback function for service discovery */ 206 } tLLCP_SDP_TRANSAC; 207 208 typedef struct { 209 uint8_t next_tid; /* next TID to use */ 210 tLLCP_SDP_TRANSAC transac[LLCP_MAX_SDP_TRANSAC]; /* active SDP transactions */ 211 NFC_HDR* p_snl; /* buffer for SNL PDU */ 212 } tLLCP_SDP_CB; 213 214 /* 215 ** LLCP control block 216 */ 217 218 typedef struct { 219 tLLCP_SDP_CB sdp_cb; /* SDP control block */ 220 tLLCP_LCB lcb; /* LLCP link control block */ 221 tLLCP_APP_CB wks_cb[LLCP_MAX_WKS]; /* Application's registration for 222 well-known services */ 223 tLLCP_APP_CB server_cb 224 [LLCP_MAX_SERVER]; /* Application's registration for SDP services */ 225 tLLCP_APP_CB 226 client_cb[LLCP_MAX_CLIENT]; /* Application's registration for client */ 227 tLLCP_DLCB dlcb[LLCP_MAX_DATA_LINK]; /* Data link connection control block */ 228 229 uint8_t max_num_ll_tx_buff; /* max number of tx UI PDU in queue */ 230 uint8_t max_num_tx_buff; /* max number of tx UI/I PDU in queue */ 231 232 uint8_t num_logical_data_link; /* number of logical data link */ 233 uint8_t 234 num_data_link_connection; /* number of established data link connection */ 235 236 /* these two thresholds (number of tx UI PDU) are dynamically adjusted based 237 * on number of logical links */ 238 uint8_t 239 ll_tx_congest_start; /* congest start threshold for each logical link*/ 240 uint8_t ll_tx_congest_end; /* congest end threshold for each logical link */ 241 242 uint8_t total_tx_ui_pdu; /* total number of tx UI PDU in all of ui_xmit_q*/ 243 uint8_t total_tx_i_pdu; /* total number of tx I PDU in all of i_xmit_q */ 244 bool overall_tx_congested; /* TRUE if tx link is congested */ 245 246 /* start point of uncongested status notification is in round robin */ 247 uint8_t ll_tx_uncongest_ntf_start_sap; /* next start of logical data link */ 248 uint8_t 249 dl_tx_uncongest_ntf_start_idx; /* next start of data link connection */ 250 251 /* 252 ** when overall rx link congestion starts, RNR is sent to remote end point 253 ** of data link connection while rx link is congested, UI PDU is discarded. 254 */ 255 uint8_t num_rx_buff; /* reserved number of rx UI/I PDU in queue */ 256 uint8_t 257 overall_rx_congest_start; /* threshold of overall rx congestion start */ 258 uint8_t overall_rx_congest_end; /* threshold of overall rx congestion end */ 259 uint8_t max_num_ll_rx_buff; /* max number of rx UI PDU in queue */ 260 261 /* 262 ** threshold (number of rx UI PDU) is dynamically adjusted based on number 263 ** of logical links when number of rx UI PDU is more than 264 ** ll_rx_congest_start, the oldest UI PDU is discarded 265 */ 266 uint8_t ll_rx_congest_start; /* rx congest start threshold for each logical 267 link */ 268 269 uint8_t total_rx_ui_pdu; /* total number of rx UI PDU in all of ui_rx_q */ 270 uint8_t total_rx_i_pdu; /* total number of rx I PDU in all of i_rx_q */ 271 bool overall_rx_congested; /* TRUE if overall rx link is congested */ 272 tLLCP_DTA_CBACK* p_dta_cback; /* callback to notify DTA when respoding SNL */ 273 bool dta_snl_resp; /* TRUE if need to notify DTA when respoding SNL*/ 274 } tLLCP_CB; 275 276 #if (LLCP_TEST_INCLUDED == TRUE) /* this is for LLCP testing */ 277 278 typedef struct { 279 uint8_t version; 280 uint16_t wks; 281 } tLLCP_TEST_PARAMS; 282 283 #endif 284 285 /* 286 ** LLCP global data 287 */ 288 289 extern tLLCP_CB llcp_cb; 290 291 /* 292 ** Functions provided by llcp_main.c 293 */ 294 void llcp_init(void); 295 void llcp_cleanup(void); 296 void llcp_process_timeout(TIMER_LIST_ENT* p_tle); 297 298 /* 299 ** Functions provided by llcp_link.c 300 */ 301 tLLCP_STATUS llcp_link_activate(tLLCP_ACTIVATE_CONFIG* p_config); 302 void llcp_link_process_link_timeout(void); 303 void llcp_link_deactivate(uint8_t reason); 304 305 void llcp_link_check_send_data(void); 306 void llcp_link_connection_cback(uint8_t conn_id, tNFC_CONN_EVT event, 307 tNFC_CONN* p_data); 308 309 /* 310 ** Functions provided by llcp_util.c 311 */ 312 void llcp_util_adjust_ll_congestion(void); 313 void llcp_util_adjust_dl_rx_congestion(void); 314 void llcp_util_check_rx_congested_status(void); 315 bool llcp_util_parse_link_params(uint16_t length, uint8_t* p_bytes); 316 tLLCP_STATUS llcp_util_send_ui(uint8_t ssap, uint8_t dsap, 317 tLLCP_APP_CB* p_app_cb, NFC_HDR* p_msg); 318 void llcp_util_send_disc(uint8_t dsap, uint8_t ssap); 319 tLLCP_DLCB* llcp_util_allocate_data_link(uint8_t reg_sap, uint8_t remote_sap); 320 void llcp_util_deallocate_data_link(tLLCP_DLCB* p_dlcb); 321 tLLCP_STATUS llcp_util_send_connect(tLLCP_DLCB* p_dlcb, 322 tLLCP_CONNECTION_PARAMS* p_params); 323 tLLCP_STATUS llcp_util_parse_connect(uint8_t* p_bytes, uint16_t length, 324 tLLCP_CONNECTION_PARAMS* p_params); 325 tLLCP_STATUS llcp_util_send_cc(tLLCP_DLCB* p_dlcb, 326 tLLCP_CONNECTION_PARAMS* p_params); 327 tLLCP_STATUS llcp_util_parse_cc(uint8_t* p_bytes, uint16_t length, 328 uint16_t* p_miu, uint8_t* p_rw); 329 void llcp_util_send_dm(uint8_t dsap, uint8_t ssap, uint8_t reason); 330 void llcp_util_build_info_pdu(tLLCP_DLCB* p_dlcb, NFC_HDR* p_msg); 331 tLLCP_STATUS llcp_util_send_frmr(tLLCP_DLCB* p_dlcb, uint8_t flags, 332 uint8_t ptype, uint8_t sequence); 333 void llcp_util_send_rr_rnr(tLLCP_DLCB* p_dlcb); 334 tLLCP_APP_CB* llcp_util_get_app_cb(uint8_t sap); 335 /* 336 ** Functions provided by llcp_dlc.c 337 */ 338 tLLCP_STATUS llcp_dlsm_execute(tLLCP_DLCB* p_dlcb, tLLCP_DLC_EVENT event, 339 void* p_data); 340 tLLCP_DLCB* llcp_dlc_find_dlcb_by_sap(uint8_t local_sap, uint8_t remote_sap); 341 void llcp_dlc_flush_q(tLLCP_DLCB* p_dlcb); 342 void llcp_dlc_proc_i_pdu(uint8_t dsap, uint8_t ssap, uint16_t i_pdu_length, 343 uint8_t* p_i_pdu, NFC_HDR* p_msg); 344 void llcp_dlc_proc_rx_pdu(uint8_t dsap, uint8_t ptype, uint8_t ssap, 345 uint16_t length, uint8_t* p_data); 346 void llcp_dlc_check_to_send_rr_rnr(void); 347 bool llcp_dlc_is_rw_open(tLLCP_DLCB* p_dlcb); 348 NFC_HDR* llcp_dlc_get_next_pdu(tLLCP_DLCB* p_dlcb); 349 uint16_t llcp_dlc_get_next_pdu_length(tLLCP_DLCB* p_dlcb); 350 351 /* 352 ** Functions provided by llcp_sdp.c 353 */ 354 void llcp_sdp_proc_data(tLLCP_SAP_CBACK_DATA* p_data); 355 tLLCP_STATUS llcp_sdp_send_sdreq(uint8_t tid, char* p_name); 356 uint8_t llcp_sdp_get_sap_by_name(char* p_name, uint8_t length); 357 tLLCP_STATUS llcp_sdp_proc_snl(uint16_t sdu_length, uint8_t* p); 358 void llcp_sdp_check_send_snl(void); 359 void llcp_sdp_proc_deactivation(void); 360 #endif 361
