312 lines
10 KiB
C
312 lines
10 KiB
C
/*
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* Copyright 2007 Oliver Ruiz Dorantes, oliver.ruiz.dorantes_at_gmail.com
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* All rights reserved. Distributed under the terms of the MIT License.
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*
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*/
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/*-
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* Copyright (c) Maksim Yevmenkin <m_evmenkin@yahoo.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*/
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/**************************************************************************
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**************************************************************************
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** Common defines and types (L2CAP)
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**************************************************************************
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**************************************************************************/
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#ifndef _L2CAP_
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#define _L2CAP_
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#include <bluetooth/bluetooth.h>
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// TODO: from BSD compatibility layer
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#define htole16(x) (x)
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#define le16toh(x) (x)
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#define le32toh(x) (x)
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#define htole32(x) (x)
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#define HZ 1000000 // us per second TODO: move somewhere more generic
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#define bluetooth_l2cap_ertx_timeout (60 * HZ)
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#define bluetooth_l2cap_rtx_timeout (300 * HZ)
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/*
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* Channel IDs are assigned relative to the instance of L2CAP node, i.e.
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* relative to the unit. So the total number of channels that unit can have
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* open at the same time is 0xffff - 0x0040 = 0xffbf (65471). This number
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* does not depend on number of connections.
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*/
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#define L2CAP_NULL_CID 0x0000 /* DO NOT USE THIS CID */
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#define L2CAP_SIGNAL_CID 0x0001 /* signaling channel ID */
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#define L2CAP_CLT_CID 0x0002 /* connectionless channel ID */
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/* 0x0003 - 0x003f Reserved */
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#define L2CAP_FIRST_CID 0x0040 /* dynamically alloc. (start) */
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#define L2CAP_LAST_CID 0xffff /* dynamically alloc. (end) */
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/*
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* L2CAP signaling command ident's are assigned relative to the connection,
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* because there is only one signaling channel (cid == 0x01) for every
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* connection. So up to 254 (0xff - 0x01) L2CAP commands can be pending at the
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* same time for the same connection.
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*/
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#define L2CAP_NULL_IDENT 0x00 /* DO NOT USE THIS IDENT */
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#define L2CAP_FIRST_IDENT 0x01 /* dynamically alloc. (start) */
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#define L2CAP_LAST_IDENT 0xff /* dynamically alloc. (end) */
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/* L2CAP MTU */
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#define L2CAP_MTU_MINIMUM 48
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#define L2CAP_MTU_DEFAULT 672
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#define L2CAP_MTU_MAXIMUM 0xffff
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/* L2CAP flush and link timeouts */
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#define L2CAP_FLUSH_TIMO_DEFAULT 0xffff /* always retransmit */
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#define L2CAP_LINK_TIMO_DEFAULT 0xffff
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/* L2CAP Command Reject reasons */
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#define L2CAP_REJ_NOT_UNDERSTOOD 0x0000
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#define L2CAP_REJ_MTU_EXCEEDED 0x0001
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#define L2CAP_REJ_INVALID_CID 0x0002
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/* 0x0003 - 0xffff - reserved for future use */
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/* Protocol/Service Multioplexor (PSM) values */
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#define L2CAP_PSM_ANY 0x0000 /* Any/Invalid PSM */
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#define L2CAP_PSM_SDP 0x0001 /* Service Discovery Protocol */
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#define L2CAP_PSM_RFCOMM 0x0003 /* RFCOMM protocol */
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#define L2CAP_PSM_TCP 0x0005 /* Telephony Control Protocol */
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#define L2CAP_PSM_TCS 0x0007 /* TCS cordless */
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#define L2CAP_PSM_BNEP 0x000F /* BNEP */
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#define L2CAP_PSM_HID_CTRL 0x0011 /* HID Control */
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#define L2CAP_PSM_HID_INT 0x0013 /* HID Interrupt */
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#define L2CAP_PSM_UPnP 0x0015 /* UPnP (ESDP) */
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#define L2CAP_PSM_AVCTP 0x0017 /* AVCTP */
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#define L2CAP_PSM_AVDTP 0x0019 /* AVDTP */
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/* < 0x1000 - reserved for future use */
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/* 0x1001 < x < 0xFFFF dinamically assigned */
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/* L2CAP Connection response command result codes */
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#define L2CAP_SUCCESS 0x0000
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#define L2CAP_PENDING 0x0001
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#define L2CAP_PSM_NOT_SUPPORTED 0x0002
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#define L2CAP_SEQUIRY_BLOCK 0x0003
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#define L2CAP_NO_RESOURCES 0x0004
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#define L2CAP_TIMEOUT 0xeeee
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#define L2CAP_UNKNOWN 0xffff
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/* 0x0005 - 0xffff - reserved for future use */
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/* L2CAP Connection response status codes */
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#define L2CAP_NO_INFO 0x0000
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#define L2CAP_AUTH_PENDING 0x0001
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#define L2CAP_AUTZ_PENDING 0x0002
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/* 0x0003 - 0xffff - reserved for future use */
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/* L2CAP Configuration response result codes */
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#define L2CAP_UNACCEPTABLE_PARAMS 0x0001
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#define L2CAP_REJECT 0x0002
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#define L2CAP_UNKNOWN_OPTION 0x0003
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/* 0x0003 - 0xffff - reserved for future use */
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/* L2CAP Configuration options */
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#define L2CAP_OPT_CFLAG_BIT 0x0001
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#define L2CAP_OPT_CFLAG(flags) ((flags) & L2CAP_OPT_CFLAG_BIT)
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#define L2CAP_OPT_HINT_BIT 0x80
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#define L2CAP_OPT_HINT(type) ((type) & L2CAP_OPT_HINT_BIT)
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#define L2CAP_OPT_HINT_MASK 0x7f
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#define L2CAP_OPT_MTU 0x01
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#define L2CAP_OPT_MTU_SIZE sizeof(uint16)
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#define L2CAP_OPT_FLUSH_TIMO 0x02
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#define L2CAP_OPT_FLUSH_TIMO_SIZE sizeof(uint16)
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#define L2CAP_OPT_QOS 0x03
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#define L2CAP_OPT_QOS_SIZE sizeof(l2cap_flow_t)
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/* 0x4 - 0xff - reserved for future use */
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#define L2CAP_CFG_IN (1 << 0) /* incoming path done */
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#define L2CAP_CFG_OUT (1 << 1) /* outgoing path done */
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#define L2CAP_CFG_BOTH (L2CAP_CFG_IN | L2CAP_CFG_OUT)
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#define L2CAP_CFG_IN_SENT (1 << 2) /* L2CAP ConfigReq sent */
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#define L2CAP_CFG_OUT_SENT (1 << 3) /* ---/--- */
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/* L2CAP Information request type codes */
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#define L2CAP_CONNLESS_MTU 0x0001
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#define L2CAP_EXTENDED_MASK 0x0002
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/* 0x0003 - 0xffff - reserved for future use */
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/* L2CAP Information response codes */
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#define L2CAP_NOT_SUPPORTED 0x0001
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/* 0x0002 - 0xffff - reserved for future use */
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/* L2CAP flow (QoS) */
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typedef struct {
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uint8 flags; /* reserved for future use */
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uint8 service_type; /* service type */
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uint32 token_rate; /* bytes per second */
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uint32 token_bucket_size; /* bytes */
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uint32 peak_bandwidth; /* bytes per second */
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uint32 latency; /* microseconds */
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uint32 delay_variation; /* microseconds */
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} __attribute__ ((packed)) l2cap_flow_t;
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/**************************************************************************
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**************************************************************************
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** Link level defines, headers and types
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**************************************************************************
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**************************************************************************/
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/* L2CAP header */
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typedef struct {
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uint16 length; /* payload size */
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uint16 dcid; /* destination channel ID */
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} __attribute__ ((packed)) l2cap_hdr_t;
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/* L2CAP ConnectionLess Traffic (CLT) (if destination cid == 0x2) */
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typedef struct {
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uint16 psm; /* Protocol/Service Multiplexor */
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} __attribute__ ((packed)) l2cap_clt_hdr_t;
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#define L2CAP_CLT_MTU_MAXIMUM (L2CAP_MTU_MAXIMUM - sizeof(l2cap_clt_hdr_t))
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/* L2CAP command header */
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typedef struct {
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uint8 code; /* command OpCode */
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uint8 ident; /* identifier to match request and response */
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uint16 length; /* command parameters length */
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} __attribute__ ((packed)) l2cap_cmd_hdr_t;
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/* L2CAP Command Reject */
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#define L2CAP_CMD_REJ 0x01
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typedef struct {
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uint16 reason; /* reason to reject command */
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/* uint8 data[]; -- optional data (depends on reason) */
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} __attribute__ ((packed)) l2cap_cmd_rej_cp;
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/* CommandReject data */
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typedef union {
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/* L2CAP_REJ_MTU_EXCEEDED */
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struct {
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uint16 mtu; /* actual signaling MTU */
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} __attribute__ ((packed)) mtu;
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/* L2CAP_REJ_INVALID_CID */
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struct {
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uint16 scid; /* local CID */
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uint16 dcid; /* remote CID */
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} __attribute__ ((packed)) cid;
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} l2cap_cmd_rej_data_t;
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typedef l2cap_cmd_rej_data_t * l2cap_cmd_rej_data_p;
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/* L2CAP Connection Request */
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#define L2CAP_CON_REQ 0x02
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typedef struct {
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uint16 psm; /* Protocol/Service Multiplexor (PSM) */
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uint16 scid; /* source channel ID */
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} __attribute__ ((packed)) l2cap_con_req_cp;
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/* L2CAP Connection Response */
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#define L2CAP_CON_RSP 0x03
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typedef struct {
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uint16 dcid; /* destination channel ID */
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uint16 scid; /* source channel ID */
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uint16 result; /* 0x00 - success */
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uint16 status; /* more info if result != 0x00 */
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} __attribute__ ((packed)) l2cap_con_rsp_cp;
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/* L2CAP Configuration Request */
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#define L2CAP_CFG_REQ 0x04
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typedef struct {
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uint16 dcid; /* destination channel ID */
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uint16 flags; /* flags */
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/* uint8 options[] -- options */
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} __attribute__ ((packed)) l2cap_cfg_req_cp;
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/* L2CAP Configuration Response */
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#define L2CAP_CFG_RSP 0x05
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typedef struct {
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uint16 scid; /* source channel ID */
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uint16 flags; /* flags */
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uint16 result; /* 0x00 - success */
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/* uint8 options[] -- options */
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} __attribute__ ((packed)) l2cap_cfg_rsp_cp;
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/* L2CAP configuration option */
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typedef struct {
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uint8 type;
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uint8 length;
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/* uint8 value[] -- option value (depends on type) */
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} __attribute__ ((packed)) l2cap_cfg_opt_t;
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typedef l2cap_cfg_opt_t * l2cap_cfg_opt_p;
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/* L2CAP configuration option value */
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typedef union {
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uint16 mtu; /* L2CAP_OPT_MTU */
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uint16 flush_timo; /* L2CAP_OPT_FLUSH_TIMO */
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l2cap_flow_t flow; /* L2CAP_OPT_QOS */
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} l2cap_cfg_opt_val_t;
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typedef l2cap_cfg_opt_val_t * l2cap_cfg_opt_val_p;
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/* L2CAP Disconnect Request */
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#define L2CAP_DISCON_REQ 0x06
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typedef struct {
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uint16 dcid; /* destination channel ID */
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uint16 scid; /* source channel ID */
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} __attribute__ ((packed)) l2cap_discon_req_cp;
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/* L2CAP Disconnect Response */
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#define L2CAP_DISCON_RSP 0x07
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typedef l2cap_discon_req_cp l2cap_discon_rsp_cp;
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/* L2CAP Echo Request */
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#define L2CAP_ECHO_REQ 0x08
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/* No command parameters, only optional data */
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/* L2CAP Echo Response */
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#define L2CAP_ECHO_RSP 0x09
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#define L2CAP_MAX_ECHO_SIZE \
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(L2CAP_MTU_MAXIMUM - sizeof(l2cap_cmd_hdr_t))
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/* No command parameters, only optional data */
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/* L2CAP Information Request */
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#define L2CAP_INFO_REQ 0x0a
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typedef struct {
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uint16 type; /* requested information type */
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} __attribute__ ((packed)) l2cap_info_req_cp;
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/* L2CAP Information Response */
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#define L2CAP_INFO_RSP 0x0b
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typedef struct {
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uint16 type; /* requested information type */
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uint16 result; /* 0x00 - success */
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/* uint8 info[] -- info data (depends on type)
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*
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* L2CAP_CONNLESS_MTU - 2 bytes connectionless MTU
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*/
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} __attribute__ ((packed)) l2cap_info_rsp_cp;
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#define IS_SIGNAL_REQ(code) ((code & 1) == 0)
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#define IS_SIGNAL_RSP(code) ((code & 1) == 1)
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typedef union {
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/* L2CAP_CONNLESS_MTU */
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struct {
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uint16 mtu;
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} __attribute__ ((packed)) mtu;
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} l2cap_info_rsp_data_t;
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typedef l2cap_info_rsp_data_t * l2cap_info_rsp_data_p;
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#endif
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