| /****************************************************************************** |
| * |
| * Copyright 1999-2012 Broadcom Corporation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| ******************************************************************************/ |
| |
| #ifndef L2CDEFS_H |
| #define L2CDEFS_H |
| |
| #include <cstdint> |
| |
| #include "internal_include/bt_target.h" // L2CAP_EXTFEA_SUPPORTED_MASK |
| #include "macros.h" |
| |
| /* L2CAP command codes |
| */ |
| #define L2CAP_CMD_REJECT 0x01 |
| #define L2CAP_CMD_CONN_REQ 0x02 |
| #define L2CAP_CMD_CONN_RSP 0x03 |
| #define L2CAP_CMD_CONFIG_REQ 0x04 |
| #define L2CAP_CMD_CONFIG_RSP 0x05 |
| #define L2CAP_CMD_DISC_REQ 0x06 |
| #define L2CAP_CMD_DISC_RSP 0x07 |
| #define L2CAP_CMD_ECHO_REQ 0x08 |
| #define L2CAP_CMD_ECHO_RSP 0x09 |
| #define L2CAP_CMD_INFO_REQ 0x0A |
| #define L2CAP_CMD_INFO_RSP 0x0B |
| #define L2CAP_CMD_AMP_CONN_REQ 0x0C |
| #define L2CAP_CMD_AMP_MOVE_REQ 0x0E |
| #define L2CAP_CMD_BLE_UPDATE_REQ 0x12 |
| #define L2CAP_CMD_BLE_UPDATE_RSP 0x13 |
| #define L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ 0x14 |
| #define L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES 0x15 |
| #define L2CAP_CMD_BLE_FLOW_CTRL_CREDIT 0x16 |
| /* Enhanced CoC */ |
| #define L2CAP_CMD_CREDIT_BASED_CONN_REQ 0x17 |
| #define L2CAP_CMD_CREDIT_BASED_CONN_RES 0x18 |
| #define L2CAP_CMD_CREDIT_BASED_RECONFIG_REQ 0x19 |
| #define L2CAP_CMD_CREDIT_BASED_RECONFIG_RES 0x1A |
| |
| /* Define some packet and header lengths |
| */ |
| /* Length and CID */ |
| #define L2CAP_PKT_OVERHEAD 4 |
| /* Cmd code, Id and length */ |
| #define L2CAP_CMD_OVERHEAD 4 |
| /* Reason (data is optional) */ |
| #define L2CAP_CMD_REJECT_LEN 2 |
| /* PSM and source CID */ |
| #define L2CAP_CONN_REQ_LEN 4 |
| /* Dest CID, source CID, reason, status */ |
| #define L2CAP_CONN_RSP_LEN 8 |
| /* Dest CID, flags (data is optional) */ |
| #define L2CAP_CONFIG_REQ_LEN 4 |
| /* Dest CID, flags, result,data optional*/ |
| #define L2CAP_CONFIG_RSP_LEN 6 |
| /* Dest CID, source CID */ |
| #define L2CAP_DISC_REQ_LEN 4 |
| /* Dest CID, source CID */ |
| #define L2CAP_DISC_RSP_LEN 4 |
| /* Data is optional */ |
| #define L2CAP_ECHO_REQ_LEN 0 |
| /* Data is optional */ |
| #define L2CAP_ECHO_RSP_LEN 0 |
| /* Info type, result (data is optional) */ |
| #define L2CAP_INFO_RSP_LEN 4 |
| |
| /* Min and max interval, latency, tout */ |
| #define L2CAP_CMD_BLE_UPD_REQ_LEN 8 |
| /* Result */ |
| #define L2CAP_CMD_BLE_UPD_RSP_LEN 2 |
| |
| /* LE_PSM, SCID, MTU, MPS, Init Credit */ |
| #define L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ_LEN 10 |
| /* DCID, MTU, MPS, Init credit, Result */ |
| #define L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES_LEN 10 |
| /* CID, Credit */ |
| #define L2CAP_CMD_BLE_FLOW_CTRL_CREDIT_LEN 4 |
| |
| /* LE PSM, MTU, MPS, Initial Credits, SCIDS[] */ |
| #define L2CAP_CMD_CREDIT_BASED_CONN_REQ_MIN_LEN 8 |
| /* MTU, MPS, Initial Credits, Result, DCIDS[] */ |
| #define L2CAP_CMD_CREDIT_BASED_CONN_RES_MIN_LEN 8 |
| |
| /* MTU, MPS, DCIDS[] */ |
| #define L2CAP_CMD_CREDIT_BASED_RECONFIG_REQ_MIN_LEN 4 |
| /* Result */ |
| #define L2CAP_CMD_CREDIT_BASED_RECONFIG_RES_LEN 2 |
| |
| /* Define the packet boundary flags |
| */ |
| #define L2CAP_PKT_START_NON_FLUSHABLE 0 |
| #define L2CAP_PKT_START 2 |
| #define L2CAP_PKT_CONTINUE 1 |
| #define L2CAP_PKT_TYPE_SHIFT 12 |
| |
| #define L2CAP_CONN_INTERNAL_MASK 0xF000 |
| #define L2CAP_CONN_LE_MASK 0xFF00 |
| |
| /* Define the LE L2CAP Connection Response Result codes |
| */ |
| typedef enum : uint8_t { |
| L2CAP_LE_RESULT_CONN_OK = 0, |
| L2CAP_LE_RESULT_NO_PSM = 2, |
| L2CAP_LE_RESULT_NO_RESOURCES = 4, |
| L2CAP_LE_RESULT_INSUFFICIENT_AUTHENTICATION = 5, |
| L2CAP_LE_RESULT_INSUFFICIENT_AUTHORIZATION = 6, |
| L2CAP_LE_RESULT_INSUFFICIENT_ENCRYP_KEY_SIZE = 7, |
| L2CAP_LE_RESULT_INSUFFICIENT_ENCRYP = 8, |
| /* We don't like peer device response */ |
| L2CAP_LE_RESULT_INVALID_SOURCE_CID = 9, |
| L2CAP_LE_RESULT_SOURCE_CID_ALREADY_ALLOCATED = 0x0A, |
| L2CAP_LE_RESULT_UNACCEPTABLE_PARAMETERS = 0x0B, |
| L2CAP_LE_RESULT_INVALID_PARAMETERS = 0x0C |
| } tL2CAP_LE_RESULT_CODE; |
| |
| /* Define the L2CAP connection result codes */ |
| typedef enum : uint16_t { |
| L2CAP_CONN_OK = 0, |
| L2CAP_CONN_PENDING = 1, |
| L2CAP_CONN_NO_PSM = 2, |
| L2CAP_CONN_SECURITY_BLOCK = 3, |
| L2CAP_CONN_NO_RESOURCES = 4, |
| L2CAP_CONN_TIMEOUT = 0xEEEE, |
| /* Generic L2CAP conn failure reasons */ |
| L2CAP_CONN_OTHER_ERROR = L2CAP_CONN_INTERNAL_MASK, |
| L2CAP_CONN_ACL_CONNECTION_FAILED = L2CAP_CONN_INTERNAL_MASK + 1, |
| L2CAP_CONN_CLIENT_SECURITY_CLEARANCE_FAILED = L2CAP_CONN_INTERNAL_MASK + 2, |
| L2CAP_CONN_NO_LINK = L2CAP_CONN_INTERNAL_MASK + 3, |
| L2CAP_CONN_CANCEL = |
| L2CAP_CONN_INTERNAL_MASK + 4, /* L2CAP connection cancelled */ |
| /* For LE result codes converted to L2CAP conn failure code */ |
| L2CAP_CONN_INSUFFICIENT_AUTHENTICATION = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_INSUFFICIENT_AUTHENTICATION, |
| L2CAP_CONN_INSUFFICIENT_AUTHORIZATION = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_INSUFFICIENT_AUTHORIZATION, |
| L2CAP_CONN_INSUFFICIENT_ENCRYP_KEY_SIZE = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_INSUFFICIENT_ENCRYP_KEY_SIZE, |
| L2CAP_CONN_INSUFFICIENT_ENCRYP = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_INSUFFICIENT_ENCRYP, |
| L2CAP_CONN_INVALID_SOURCE_CID = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_INVALID_SOURCE_CID, |
| L2CAP_CONN_SOURCE_CID_ALREADY_ALLOCATED = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_SOURCE_CID_ALREADY_ALLOCATED, |
| L2CAP_CONN_UNACCEPTABLE_PARAMETERS = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_UNACCEPTABLE_PARAMETERS, |
| L2CAP_CONN_INVALID_PARAMETERS = |
| L2CAP_CONN_LE_MASK + L2CAP_LE_RESULT_INVALID_PARAMETERS, |
| } tL2CAP_CONN; |
| |
| inline std::string l2cap_result_code_text(const tL2CAP_CONN& result) { |
| switch (result) { |
| CASE_RETURN_TEXT(L2CAP_CONN_OK); |
| CASE_RETURN_TEXT(L2CAP_CONN_PENDING); |
| CASE_RETURN_TEXT(L2CAP_CONN_NO_PSM); |
| CASE_RETURN_TEXT(L2CAP_CONN_SECURITY_BLOCK); |
| CASE_RETURN_TEXT(L2CAP_CONN_NO_RESOURCES); |
| CASE_RETURN_TEXT(L2CAP_CONN_TIMEOUT); |
| CASE_RETURN_TEXT(L2CAP_CONN_OTHER_ERROR); |
| CASE_RETURN_TEXT(L2CAP_CONN_ACL_CONNECTION_FAILED); |
| CASE_RETURN_TEXT(L2CAP_CONN_CLIENT_SECURITY_CLEARANCE_FAILED); |
| CASE_RETURN_TEXT(L2CAP_CONN_NO_LINK); |
| CASE_RETURN_TEXT(L2CAP_CONN_CANCEL); |
| CASE_RETURN_TEXT(L2CAP_CONN_INSUFFICIENT_AUTHENTICATION); |
| CASE_RETURN_TEXT(L2CAP_CONN_INSUFFICIENT_AUTHORIZATION); |
| CASE_RETURN_TEXT(L2CAP_CONN_INSUFFICIENT_ENCRYP_KEY_SIZE); |
| CASE_RETURN_TEXT(L2CAP_CONN_INSUFFICIENT_ENCRYP); |
| CASE_RETURN_TEXT(L2CAP_CONN_INVALID_SOURCE_CID); |
| CASE_RETURN_TEXT(L2CAP_CONN_SOURCE_CID_ALREADY_ALLOCATED); |
| CASE_RETURN_TEXT(L2CAP_CONN_UNACCEPTABLE_PARAMETERS); |
| CASE_RETURN_TEXT(L2CAP_CONN_INVALID_PARAMETERS); |
| default: |
| return std::string("UNKNOWN[") + std::to_string(result) + |
| std::string("]"); |
| } |
| } |
| |
| static inline std::string l2cap_command_code_text(uint8_t cmd) { |
| switch (cmd) { |
| CASE_RETURN_TEXT(L2CAP_CMD_REJECT); |
| CASE_RETURN_TEXT(L2CAP_CMD_CONN_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_CONN_RSP); |
| CASE_RETURN_TEXT(L2CAP_CMD_CONFIG_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_CONFIG_RSP); |
| CASE_RETURN_TEXT(L2CAP_CMD_DISC_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_DISC_RSP); |
| CASE_RETURN_TEXT(L2CAP_CMD_ECHO_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_ECHO_RSP); |
| CASE_RETURN_TEXT(L2CAP_CMD_INFO_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_INFO_RSP); |
| CASE_RETURN_TEXT(L2CAP_CMD_AMP_CONN_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_AMP_MOVE_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_BLE_UPDATE_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_BLE_UPDATE_RSP); |
| CASE_RETURN_TEXT(L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES); |
| CASE_RETURN_TEXT(L2CAP_CMD_BLE_FLOW_CTRL_CREDIT); |
| CASE_RETURN_TEXT(L2CAP_CMD_CREDIT_BASED_CONN_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_CREDIT_BASED_CONN_RES); |
| CASE_RETURN_TEXT(L2CAP_CMD_CREDIT_BASED_RECONFIG_REQ); |
| CASE_RETURN_TEXT(L2CAP_CMD_CREDIT_BASED_RECONFIG_RES); |
| default: |
| return std::string("UNKNOWN L2CAP CMD[") + std::to_string(cmd) + |
| std::string("]"); |
| } |
| } |
| |
| inline tL2CAP_CONN to_l2cap_result_code(uint16_t result) { |
| return static_cast<tL2CAP_CONN>(result); |
| } |
| |
| inline std::string l2cap_le_result_code_text( |
| const tL2CAP_LE_RESULT_CODE& code) { |
| switch (code) { |
| case L2CAP_LE_RESULT_CONN_OK: |
| return std::string("le connection success"); |
| case L2CAP_LE_RESULT_NO_PSM: |
| return std::string("le no psm service"); |
| case L2CAP_LE_RESULT_NO_RESOURCES: |
| return std::string("le no resources"); |
| case L2CAP_LE_RESULT_INSUFFICIENT_AUTHENTICATION: |
| return std::string("le authentication failed"); |
| case L2CAP_LE_RESULT_INSUFFICIENT_AUTHORIZATION: |
| return std::string("le authorization failed"); |
| case L2CAP_LE_RESULT_INSUFFICIENT_ENCRYP_KEY_SIZE: |
| return std::string("le encryption key size failed"); |
| case L2CAP_LE_RESULT_INSUFFICIENT_ENCRYP: |
| return std::string("le encryption failed"); |
| case L2CAP_LE_RESULT_INVALID_SOURCE_CID: |
| return std::string("le invalid source channel identifier"); |
| case L2CAP_LE_RESULT_SOURCE_CID_ALREADY_ALLOCATED: |
| return std::string("le source channel identifier busy"); |
| case L2CAP_LE_RESULT_UNACCEPTABLE_PARAMETERS: |
| return std::string("le unacceptable parameters"); |
| case L2CAP_LE_RESULT_INVALID_PARAMETERS: |
| return std::string("invalid parameters"); |
| } |
| } |
| |
| /* Credit based reconfig results code */ |
| #define L2CAP_RECONFIG_SUCCEED 0 |
| #define L2CAP_RECONFIG_REDUCTION_MTU_NO_ALLOWED 1 |
| #define L2CAP_RECONFIG_REDUCTION_MPS_NO_ALLOWED 2 |
| #define L2CAP_RECONFIG_INVALID_DCID 3 |
| #define L2CAP_RECONFIG_UNACCAPTED_PARAM 4 |
| |
| /* Define the L2CAP command reject reason codes |
| */ |
| #define L2CAP_CMD_REJ_NOT_UNDERSTOOD 0 |
| #define L2CAP_CMD_REJ_MTU_EXCEEDED 1 |
| #define L2CAP_CMD_REJ_INVALID_CID 2 |
| |
| /* L2CAP Predefined CIDs |
| */ |
| enum : uint16_t { |
| L2CAP_SIGNALLING_CID = 1, |
| L2CAP_CONNECTIONLESS_CID = 2, |
| L2CAP_AMP_CID = 3, |
| L2CAP_ATT_CID = 4, |
| L2CAP_BLE_SIGNALLING_CID = 5, |
| L2CAP_SMP_CID = 6, |
| L2CAP_SMP_BR_CID = 7, |
| L2CAP_BASE_APPL_CID = 0x0040, |
| }; |
| |
| /* Fixed Channels mask bits */ |
| |
| /* Signal channel supported (Mandatory) */ |
| #define L2CAP_FIXED_CHNL_SIG_BIT (1 << L2CAP_SIGNALLING_CID) |
| |
| /* Connectionless reception */ |
| #define L2CAP_FIXED_CHNL_CNCTLESS_BIT (1 << L2CAP_CONNECTIONLESS_CID) |
| |
| /* Attribute protocol supported */ |
| #define L2CAP_FIXED_CHNL_ATT_BIT (1 << L2CAP_ATT_CID) |
| |
| /* BLE Signalling supported */ |
| #define L2CAP_FIXED_CHNL_BLE_SIG_BIT (1 << L2CAP_BLE_SIGNALLING_CID) |
| |
| /* BLE Security Mgr supported */ |
| #define L2CAP_FIXED_CHNL_SMP_BIT (1 << L2CAP_SMP_CID) |
| |
| /* Security Mgr over BR supported */ |
| #define L2CAP_FIXED_CHNL_SMP_BR_BIT (1 << L2CAP_SMP_BR_CID) |
| |
| /* Define the L2CAP configuration result codes |
| */ |
| #define L2CAP_CFG_OK 0 |
| #define L2CAP_CFG_UNACCEPTABLE_PARAMS 1 |
| #define L2CAP_CFG_FAILED_NO_REASON 2 |
| #define L2CAP_CFG_UNKNOWN_OPTIONS 3 |
| #define L2CAP_CFG_PENDING 4 |
| |
| static_assert(L2CAP_CONN_OTHER_ERROR != L2CAP_CFG_FAILED_NO_REASON, |
| "Different error code should be provided for Connect error and " |
| "Config error"); |
| |
| /* Define the L2CAP configuration option types |
| */ |
| #define L2CAP_CFG_TYPE_MTU 0x01 |
| #define L2CAP_CFG_TYPE_FLUSH_TOUT 0x02 |
| #define L2CAP_CFG_TYPE_QOS 0x03 |
| #define L2CAP_CFG_TYPE_FCR 0x04 |
| #define L2CAP_CFG_TYPE_FCS 0x05 |
| #define L2CAP_CFG_TYPE_EXT_FLOW 0x06 |
| |
| #define L2CAP_CFG_MTU_OPTION_LEN 2 /* MTU option length */ |
| #define L2CAP_CFG_FLUSH_OPTION_LEN 2 /* Flush option len */ |
| #define L2CAP_CFG_QOS_OPTION_LEN 22 /* QOS option length */ |
| #define L2CAP_CFG_FCR_OPTION_LEN 9 /* FCR option length */ |
| #define L2CAP_CFG_FCS_OPTION_LEN 1 /* FCR option length */ |
| #define L2CAP_CFG_EXT_FLOW_OPTION_LEN 16 /* Extended Flow Spec */ |
| #define L2CAP_CFG_OPTION_OVERHEAD 2 /* Type and length */ |
| |
| /* Configuration Cmd/Rsp Flags mask |
| */ |
| #define L2CAP_CFG_FLAGS_MASK_CONT 0x0001 /* Flags mask: Continuation */ |
| |
| /* FCS Check Option values |
| */ |
| #define L2CAP_CFG_FCS_BYPASS 0 /* Bypass the FCS in streaming or ERTM modes */ |
| #define L2CAP_CFG_FCS_USE \ |
| 1 /* Use the FCS in streaming or ERTM modes [default] */ |
| |
| /* Default values for configuration |
| */ |
| #define L2CAP_NO_AUTOMATIC_FLUSH 0xFFFF |
| |
| #define L2CAP_DEFAULT_MTU (672) |
| #define L2CAP_DEFAULT_SERV_TYPE 1 |
| #define L2CAP_DEFAULT_TOKEN_RATE 0 |
| #define L2CAP_DEFAULT_BUCKET_SIZE 0 |
| #define L2CAP_DEFAULT_PEAK_BANDWIDTH 0 |
| #define L2CAP_DEFAULT_LATENCY 0xFFFFFFFF |
| #define L2CAP_DEFAULT_DELAY 0xFFFFFFFF |
| |
| /* Define the L2CAP disconnect result codes |
| */ |
| #define L2CAP_DISC_OK 0 |
| #define L2CAP_DISC_TIMEOUT 0xEEEE |
| |
| /* Define the L2CAP info resp result codes |
| */ |
| #define L2CAP_INFO_RESP_RESULT_SUCCESS 0 |
| #define L2CAP_INFO_RESP_RESULT_NOT_SUPPORTED 1 |
| |
| /* Define the info-type fields of information request & response |
| */ |
| #define L2CAP_CONNLESS_MTU_INFO_TYPE 0x0001 |
| /* Used in Information Req/Response */ |
| #define L2CAP_EXTENDED_FEATURES_INFO_TYPE 0x0002 |
| /* Used in AMP */ |
| #define L2CAP_FIXED_CHANNELS_INFO_TYPE 0x0003 |
| |
| /* Connectionless MTU size */ |
| #define L2CAP_CONNLESS_MTU_INFO_SIZE 2 |
| /* Extended features array size */ |
| #define L2CAP_EXTENDED_FEATURES_ARRAY_SIZE 4 |
| /* Fixed channel array size */ |
| #define L2CAP_FIXED_CHNL_ARRAY_SIZE 8 |
| |
| /* Extended features mask bits |
| */ |
| /* Enhanced retransmission mode */ |
| #define L2CAP_EXTFEA_ENH_RETRANS 0x00000008 |
| /* Streaming Mode */ |
| #define L2CAP_EXTFEA_STREAM_MODE 0x00000010 |
| /* Optional FCS (if set No FCS desired) */ |
| #define L2CAP_EXTFEA_NO_CRC 0x00000020 |
| /* Extended flow spec */ |
| #define L2CAP_EXTFEA_EXT_FLOW_SPEC 0x00000040 |
| /* Fixed channels */ |
| #define L2CAP_EXTFEA_FIXED_CHNLS 0x00000080 |
| /* Extended Window Size */ |
| #define L2CAP_EXTFEA_EXT_WINDOW 0x00000100 |
| /* Unicast Connectionless Data Reception */ |
| #define L2CAP_EXTFEA_UCD_RECEPTION 0x00000200 |
| |
| /* Mask for locally supported features used in Information Response |
| * (default to none) */ |
| #ifndef L2CAP_EXTFEA_SUPPORTED_MASK |
| #define L2CAP_EXTFEA_SUPPORTED_MASK 0 |
| #endif |
| |
| /* Mask for LE supported features used in Information Response |
| * (default to none) */ |
| #ifndef L2CAP_BLE_EXTFEA_MASK |
| #define L2CAP_BLE_EXTFEA_MASK 0 |
| #endif |
| |
| /* Define a value that tells L2CAP to use the default HCI ACL buffer size */ |
| #define L2CAP_INVALID_ERM_BUF_SIZE 0 |
| /* Define a value that tells L2CAP to use the default MPS */ |
| #define L2CAP_DEFAULT_ERM_MPS 0x0000 |
| |
| #define L2CAP_FCR_OVERHEAD 2 /* Control word */ |
| #define L2CAP_FCS_LEN 2 /* FCS takes 2 bytes */ |
| #define L2CAP_SDU_LEN_OVERHEAD 2 /* SDU length field is 2 bytes */ |
| #define L2CAP_SDU_LEN_OFFSET 2 /* SDU length offset is 2 bytes */ |
| #define L2CAP_EXT_CONTROL_OVERHEAD 4 /* Extended Control Field */ |
| /* length(2), channel(2), control(4), SDU length(2) FCS(2) */ |
| #define L2CAP_MAX_HEADER_FCS \ |
| (L2CAP_PKT_OVERHEAD + L2CAP_EXT_CONTROL_OVERHEAD + L2CAP_SDU_LEN_OVERHEAD + \ |
| L2CAP_FCS_LEN) |
| |
| /* TODO: This value can probably be optimized per transport, and per L2CAP |
| * socket type, but this should not bring any big performance improvements. For |
| * LE CoC, it should be biggest multiple of "PDU length" smaller than 0xffff (so |
| * depend on controller buffer size), for Classic, making it multiple of PDU |
| * length and also of the 3DH5 air including the l2cap headers in each packet. |
| */ |
| #define L2CAP_SDU_LENGTH_MAX (8080 + 26 - (L2CAP_MIN_OFFSET + 6)) |
| constexpr uint16_t L2CAP_SDU_LENGTH_LE_MAX = 0xffff; |
| |
| /* SAR bits in the control word |
| */ |
| /* Control word to begin with for unsegmented PDU*/ |
| #define L2CAP_FCR_UNSEG_SDU 0x0000 |
| /* ...for Starting PDU of a semented SDU */ |
| #define L2CAP_FCR_START_SDU 0x4000 |
| /* ...for ending PDU of a segmented SDU */ |
| #define L2CAP_FCR_END_SDU 0x8000 |
| /* ...for continuation PDU of a segmented SDU */ |
| #define L2CAP_FCR_CONT_SDU 0xc000 |
| |
| /* Supervisory frame types */ |
| /* Supervisory frame - RR */ |
| #define L2CAP_FCR_SUP_RR 0x0000 |
| /* Supervisory frame - REJ */ |
| #define L2CAP_FCR_SUP_REJ 0x0001 |
| /* Supervisory frame - RNR */ |
| #define L2CAP_FCR_SUP_RNR 0x0002 |
| /* Supervisory frame - SREJ */ |
| #define L2CAP_FCR_SUP_SREJ 0x0003 |
| |
| /* Mask to get the SAR bits from control word */ |
| #define L2CAP_FCR_SAR_BITS 0xC000 |
| /* Bits to shift right to get the SAR bits from ctrl-word */ |
| #define L2CAP_FCR_SAR_BITS_SHIFT 14 |
| |
| /* Mask to check if a PDU is S-frame */ |
| #define L2CAP_FCR_S_FRAME_BIT 0x0001 |
| /* Mask to get the req-seq from control word */ |
| #define L2CAP_FCR_REQ_SEQ_BITS 0x3F00 |
| /* Bits to shift right to get the req-seq from ctrl-word */ |
| #define L2CAP_FCR_REQ_SEQ_BITS_SHIFT 8 |
| /* Mask on get the tx-seq from control word */ |
| #define L2CAP_FCR_TX_SEQ_BITS 0x007E |
| /* Bits to shift right to get the tx-seq from ctrl-word */ |
| #define L2CAP_FCR_TX_SEQ_BITS_SHIFT 1 |
| |
| /* F-bit in the control word (Sup and I frames) */ |
| #define L2CAP_FCR_F_BIT 0x0080 |
| /* P-bit in the control word (Sup frames only) */ |
| #define L2CAP_FCR_P_BIT 0x0010 |
| |
| #define L2CAP_FCR_F_BIT_SHIFT 7 |
| #define L2CAP_FCR_P_BIT_SHIFT 4 |
| |
| /* Mask to get the segmentation bits from ctrl-word */ |
| #define L2CAP_FCR_SEG_BITS 0xC000 |
| /* Bits to shift right to get the S-bits from ctrl-word */ |
| #define L2CAP_FCR_SUP_SHIFT 2 |
| /* Mask to get the supervisory bits from ctrl-word */ |
| #define L2CAP_FCR_SUP_BITS 0x000C |
| |
| /* Initial state of the CRC register */ |
| #define L2CAP_FCR_INIT_CRC 0 |
| /* Mask for sequence numbers (range 0 - 63) */ |
| #define L2CAP_FCR_SEQ_MODULO 0x3F |
| |
| namespace fmt { |
| template <> |
| struct formatter<tL2CAP_CONN> : enum_formatter<tL2CAP_CONN> {}; |
| } // namespace fmt |
| |
| #endif |