/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * * BlueZ - Bluetooth protocol stack for Linux * * Copyright (C) 2000-2002 Maxim Krasnyansky * Copyright (C) 2003-2011 Marcel Holtmann * * */ #ifndef __L2CAP_H #define __L2CAP_H /* L2CAP command codes */ #define L2CAP_COMMAND_REJ 0x01 #define L2CAP_CONN_REQ 0x02 #define L2CAP_CONN_RSP 0x03 #define L2CAP_CONF_REQ 0x04 #define L2CAP_CONF_RSP 0x05 #define L2CAP_DISCONN_REQ 0x06 #define L2CAP_DISCONN_RSP 0x07 #define L2CAP_ECHO_REQ 0x08 #define L2CAP_ECHO_RSP 0x09 #define L2CAP_INFO_REQ 0x0a #define L2CAP_INFO_RSP 0x0b #define L2CAP_CREATE_REQ 0x0c #define L2CAP_CREATE_RSP 0x0d #define L2CAP_MOVE_REQ 0x0e #define L2CAP_MOVE_RSP 0x0f #define L2CAP_MOVE_CFM 0x10 #define L2CAP_MOVE_CFM_RSP 0x11 /* L2CAP extended feature mask */ #define L2CAP_FEAT_FLOWCTL 0x00000001 #define L2CAP_FEAT_RETRANS 0x00000002 #define L2CAP_FEAT_BIDIR_QOS 0x00000004 #define L2CAP_FEAT_ERTM 0x00000008 #define L2CAP_FEAT_STREAMING 0x00000010 #define L2CAP_FEAT_FCS 0x00000020 #define L2CAP_FEAT_EXT_FLOW 0x00000040 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 #define L2CAP_FEAT_EXT_WINDOW 0x00000100 #define L2CAP_FEAT_UCD 0x00000200 /* L2CAP Control Field bit masks */ #define L2CAP_CTRL_SAR_MASK 0xC000 #define L2CAP_CTRL_REQSEQ_MASK 0x3F00 #define L2CAP_CTRL_TXSEQ_MASK 0x007E #define L2CAP_CTRL_SUPERVISE_MASK 0x000C #define L2CAP_CTRL_RETRANS 0x0080 #define L2CAP_CTRL_FINAL 0x0080 #define L2CAP_CTRL_POLL 0x0010 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ #define L2CAP_CTRL_TXSEQ_SHIFT 1 #define L2CAP_CTRL_SUPER_SHIFT 2 #define L2CAP_CTRL_REQSEQ_SHIFT 8 #define L2CAP_CTRL_SAR_SHIFT 14 #define L2CAP_EXT_CTRL_TXSEQ_MASK 0xFFFC0000 #define L2CAP_EXT_CTRL_SAR_MASK 0x00030000 #define L2CAP_EXT_CTRL_SUPERVISE_MASK 0x00030000 #define L2CAP_EXT_CTRL_REQSEQ_MASK 0x0000FFFC #define L2CAP_EXT_CTRL_POLL 0x00040000 #define L2CAP_EXT_CTRL_FINAL 0x00000002 #define L2CAP_EXT_CTRL_FRAME_TYPE 0x00000001 /* I- or S-Frame */ #define L2CAP_EXT_CTRL_REQSEQ_SHIFT 2 #define L2CAP_EXT_CTRL_SAR_SHIFT 16 #define L2CAP_EXT_CTRL_SUPER_SHIFT 16 #define L2CAP_EXT_CTRL_TXSEQ_SHIFT 18 /* L2CAP Supervisory Function */ #define L2CAP_SUPER_RR 0x00 #define L2CAP_SUPER_REJ 0x01 #define L2CAP_SUPER_RNR 0x02 #define L2CAP_SUPER_SREJ 0x03 /* L2CAP Segmentation and Reassembly */ #define L2CAP_SAR_UNSEGMENTED 0x00 #define L2CAP_SAR_START 0x01 #define L2CAP_SAR_END 0x02 #define L2CAP_SAR_CONTINUE 0x03 #define L2CAP_SDULEN_SIZE 2 /* L2CAP fixed channels */ #define L2CAP_FC_L2CAP 0x02 #define L2CAP_FC_CONNLESS 0x04 #define L2CAP_FC_A2MP 0x08 /* L2CAP structures */ typedef struct { uint16_t len; uint16_t cid; } __attribute__ ((packed)) l2cap_hdr; #define L2CAP_HDR_SIZE 4 typedef struct { uint8_t code; uint8_t ident; uint16_t len; } __attribute__ ((packed)) l2cap_cmd_hdr; #define L2CAP_CMD_HDR_SIZE 4 typedef struct { uint16_t reason; } __attribute__ ((packed)) l2cap_cmd_rej; #define L2CAP_CMD_REJ_SIZE 2 typedef struct { uint16_t psm; uint16_t scid; } __attribute__ ((packed)) l2cap_conn_req; #define L2CAP_CONN_REQ_SIZE 4 typedef struct { uint16_t dcid; uint16_t scid; uint16_t result; uint16_t status; } __attribute__ ((packed)) l2cap_conn_rsp; #define L2CAP_CONN_RSP_SIZE 8 /* connect result */ #define L2CAP_CR_SUCCESS 0x0000 #define L2CAP_CR_PEND 0x0001 #define L2CAP_CR_BAD_PSM 0x0002 #define L2CAP_CR_SEC_BLOCK 0x0003 #define L2CAP_CR_NO_MEM 0x0004 /* connect status */ #define L2CAP_CS_NO_INFO 0x0000 #define L2CAP_CS_AUTHEN_PEND 0x0001 #define L2CAP_CS_AUTHOR_PEND 0x0002 typedef struct { uint16_t dcid; uint16_t flags; uint8_t data[0]; } __attribute__ ((packed)) l2cap_conf_req; #define L2CAP_CONF_REQ_SIZE 4 typedef struct { uint16_t scid; uint16_t flags; uint16_t result; uint8_t data[0]; } __attribute__ ((packed)) l2cap_conf_rsp; #define L2CAP_CONF_RSP_SIZE 6 #define L2CAP_CONF_SUCCESS 0x0000 #define L2CAP_CONF_UNACCEPT 0x0001 #define L2CAP_CONF_REJECT 0x0002 #define L2CAP_CONF_UNKNOWN 0x0003 #define L2CAP_CONF_PENDING 0x0004 #define L2CAP_CONF_EFS_REJECT 0x0005 typedef struct { uint8_t type; uint8_t len; uint8_t val[0]; } __attribute__ ((packed)) l2cap_conf_opt; #define L2CAP_CONF_OPT_SIZE 2 #define L2CAP_CONF_MTU 0x01 #define L2CAP_CONF_FLUSH_TO 0x02 #define L2CAP_CONF_QOS 0x03 #define L2CAP_CONF_RFC 0x04 #define L2CAP_CONF_FCS 0x05 #define L2CAP_CONF_EFS 0x06 #define L2CAP_CONF_EWS 0x07 #define L2CAP_CONF_MAX_SIZE 22 #define L2CAP_MODE_BASIC 0x00 #define L2CAP_MODE_RETRANS 0x01 #define L2CAP_MODE_FLOWCTL 0x02 #define L2CAP_MODE_ERTM 0x03 #define L2CAP_MODE_STREAMING 0x04 #define L2CAP_SERVTYPE_NOTRAFFIC 0x00 #define L2CAP_SERVTYPE_BESTEFFORT 0x01 #define L2CAP_SERVTYPE_GUARANTEED 0x02 typedef struct { uint16_t dcid; uint16_t scid; } __attribute__ ((packed)) l2cap_disconn_req; #define L2CAP_DISCONN_REQ_SIZE 4 typedef struct { uint16_t dcid; uint16_t scid; } __attribute__ ((packed)) l2cap_disconn_rsp; #define L2CAP_DISCONN_RSP_SIZE 4 typedef struct { uint16_t type; } __attribute__ ((packed)) l2cap_info_req; #define L2CAP_INFO_REQ_SIZE 2 typedef struct { uint16_t type; uint16_t result; uint8_t data[0]; } __attribute__ ((packed)) l2cap_info_rsp; #define L2CAP_INFO_RSP_SIZE 4 /* info type */ #define L2CAP_IT_CL_MTU 0x0001 #define L2CAP_IT_FEAT_MASK 0x0002 /* info result */ #define L2CAP_IR_SUCCESS 0x0000 #define L2CAP_IR_NOTSUPP 0x0001 typedef struct { uint16_t psm; uint16_t scid; uint8_t id; } __attribute__ ((packed)) l2cap_create_req; #define L2CAP_CREATE_REQ_SIZE 5 typedef struct { uint16_t dcid; uint16_t scid; uint16_t result; uint16_t status; } __attribute__ ((packed)) l2cap_create_rsp; #define L2CAP_CREATE_RSP_SIZE 8 typedef struct { uint16_t icid; uint8_t id; } __attribute__ ((packed)) l2cap_move_req; #define L2CAP_MOVE_REQ_SIZE 3 typedef struct { uint16_t icid; uint16_t result; } __attribute__ ((packed)) l2cap_move_rsp; #define L2CAP_MOVE_RSP_SIZE 4 typedef struct { uint16_t icid; uint16_t result; } __attribute__ ((packed)) l2cap_move_cfm; #define L2CAP_MOVE_CFM_SIZE 4 typedef struct { uint16_t icid; } __attribute__ ((packed)) l2cap_move_cfm_rsp; #define L2CAP_MOVE_CFM_RSP_SIZE 2 #endif /* __L2CAP_H */