FreeBSD/Linux Kernel Cross Reference
sys/netbt/rfcomm.h

     /*      $NetBSD: rfcomm.h,v 1.2.2.1 2007/07/19 16:04:19 liamjfoy Exp $  */
     
     /*-
      * Copyright (c) 2006 Itronix Inc.
      * All rights reserved.
      *
      * Written by Iain Hibbert for Itronix Inc.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. The name of Itronix Inc. may not be used to endorse
     *    or promote products derived from this software without specific
     *    prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
     * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     * ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    /*-
     * Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $Id: rfcomm.h,v 1.2.2.1 2007/07/19 16:04:19 liamjfoy Exp $
     * $FreeBSD: src/sys/netgraph/bluetooth/include/ng_btsocket_rfcomm.h,v 1.4 2005/01/11 01:39:53 emax Exp $
     */
    
    #ifndef _NETBT_RFCOMM_H_
    #define _NETBT_RFCOMM_H_
    
    #include <sys/types.h>
    
    /*************************************************************************
     *************************************************************************
     **                             RFCOMM                                  **
     *************************************************************************
     *************************************************************************/
    
    #define RFCOMM_MTU_MAX                  32767
    #define RFCOMM_MTU_MIN                  23
    #define RFCOMM_MTU_DEFAULT              127
    
    #define RFCOMM_CREDITS_MAX              255     /* in any single packet */
    #define RFCOMM_CREDITS_DEFAULT          7       /* default initial value */
    
    #define RFCOMM_CHANNEL_MIN              1
    #define RFCOMM_CHANNEL_MAX              30
    
    /* RFCOMM frame types */
    #define RFCOMM_FRAME_SABM               0x2f
    #define RFCOMM_FRAME_DISC               0x43
    #define RFCOMM_FRAME_UA                 0x63
    #define RFCOMM_FRAME_DM                 0x0f
    #define RFCOMM_FRAME_UIH                0xef
    
    /* RFCOMM MCC commands */
    #define RFCOMM_MCC_TEST                 0x08    /* Test */
    #define RFCOMM_MCC_FCON                 0x28    /* Flow Control on */
    #define RFCOMM_MCC_FCOFF                0x18    /* Flow Control off */
    #define RFCOMM_MCC_MSC                  0x38    /* Modem Status Command */
    #define RFCOMM_MCC_RPN                  0x24    /* Remote Port Negotiation */
    #define RFCOMM_MCC_RLS                  0x14    /* Remote Line Status */
    #define RFCOMM_MCC_PN                   0x20    /* Port Negotiation */
    #define RFCOMM_MCC_NSC                  0x04    /* Non Supported Command */
    
   /* RFCOMM modem signals */
   #define RFCOMM_MSC_FC                   0x02    /* Flow Control asserted */
   #define RFCOMM_MSC_RTC                  0x04    /* Ready To Communicate */
   #define RFCOMM_MSC_RTR                  0x08    /* Ready To Receive */
   #define RFCOMM_MSC_IC                   0x40    /* Incomming Call (RING) */
   #define RFCOMM_MSC_DV                   0x80    /* Data Valid */
   
   /* RPN parameters - baud rate */
   #define RFCOMM_RPN_BR_2400              0x0
   #define RFCOMM_RPN_BR_4800              0x1
   #define RFCOMM_RPN_BR_7200              0x2
   #define RFCOMM_RPN_BR_9600              0x3
   #define RFCOMM_RPN_BR_19200             0x4
   #define RFCOMM_RPN_BR_38400             0x5
   #define RFCOMM_RPN_BR_57600             0x6
   #define RFCOMM_RPN_BR_115200            0x7
   #define RFCOMM_RPN_BR_230400            0x8
   
   /* RPN parameters - data bits */
   #define RFCOMM_RPN_DATA_5               0x0
   #define RFCOMM_RPN_DATA_6               0x1
   #define RFCOMM_RPN_DATA_7               0x2
   #define RFCOMM_RPN_DATA_8               0x3
   
   /* RPN parameters - stop bit */
   #define RFCOMM_RPN_STOP_1               0
   #define RFCOMM_RPN_STOP_15              1
   
   /* RPN parameters - parity enable */
   #define RFCOMM_RPN_PARITY_NONE          0x0
   
   /* RPN parameters - parity type */
   #define RFCOMM_RPN_PARITY_ODD           0x0
   #define RFCOMM_RPN_PARITY_EVEN          0x1
   #define RFCOMM_RPN_PARITY_MARK          0x2
   #define RFCOMM_RPN_PARITY_SPACE         0x3
   
   /* RPN parameters - default line_setting */
   #define RFCOMM_RPN_8_N_1                0x03
   
   /* RPN parameters - flow control */
   #define RFCOMM_RPN_XON_CHAR             0x11
   #define RFCOMM_RPN_XOFF_CHAR            0x13
   #define RFCOMM_RPN_FLOW_NONE            0x00
   
   /* RPN parameters - mask */
   #define RFCOMM_RPN_PM_RATE              0x0001
   #define RFCOMM_RPN_PM_DATA              0x0002
   #define RFCOMM_RPN_PM_STOP              0x0004
   #define RFCOMM_RPN_PM_PARITY            0x0008
   #define RFCOMM_RPN_PM_PTYPE             0x0010
   #define RFCOMM_RPN_PM_XON               0x0020
   #define RFCOMM_RPN_PM_XOFF              0x0040
   
   #define RFCOMM_RPN_PM_FLOW              0x3f00
   
   #define RFCOMM_RPN_PM_ALL               0x3f7f
   
   /* RFCOMM command frame header */
   struct rfcomm_cmd_hdr
   {
           uint8_t         address;
           uint8_t         control;
           uint8_t         length;
           uint8_t         fcs;
   } __attribute__ ((__packed__));
   
   /* RFCOMM MSC command */
   struct rfcomm_mcc_msc
   {
           uint8_t         address;
           uint8_t         modem;
           uint8_t         brk;
   } __attribute__ ((__packed__));
   
   /* RFCOMM RPN command */
   struct rfcomm_mcc_rpn
   {
           uint8_t         dlci;
           uint8_t         bit_rate;
           uint8_t         line_settings;
           uint8_t         flow_control;
           uint8_t         xon_char;
           uint8_t         xoff_char;
           uint16_t        param_mask;
   } __attribute__ ((__packed__));
   
   /* RFCOMM RLS command */
   struct rfcomm_mcc_rls
   {
           uint8_t         address;
           uint8_t         status;
   } __attribute__ ((__packed__));
   
   /* RFCOMM PN command */
   struct rfcomm_mcc_pn
   {
           uint8_t         dlci;
           uint8_t         flow_control;
           uint8_t         priority;
           uint8_t         ack_timer;
           uint16_t        mtu;
           uint8_t         max_retrans;
           uint8_t         credits;
   } __attribute__ ((__packed__));
   
   /* RFCOMM frame parsing macros */
   #define RFCOMM_DLCI(b)                  (((b) & 0xfc) >> 2)
   #define RFCOMM_TYPE(b)                  (((b) & 0xef))
   
   #define RFCOMM_EA(b)                    (((b) & 0x01))
   #define RFCOMM_CR(b)                    (((b) & 0x02) >> 1)
   #define RFCOMM_PF(b)                    (((b) & 0x10) >> 4)
   
   #define RFCOMM_CHANNEL(dlci)            (((dlci) >> 1) & 0x2f)
   #define RFCOMM_DIRECTION(dlci)          ((dlci) & 0x1)
   
   #define RFCOMM_MKADDRESS(cr, dlci) \
           ((((dlci) & 0x3f) << 2) | ((cr) << 1) | 0x01)
   
   #define RFCOMM_MKCONTROL(type, pf)      ((((type) & 0xef) | ((pf) << 4)))
   #define RFCOMM_MKDLCI(dir, channel)     ((((channel) & 0x1f) << 1) | (dir))
   
   /* RFCOMM MCC macros */
   #define RFCOMM_MCC_TYPE(b)              (((b) & 0xfc) >> 2)
   #define RFCOMM_MCC_LENGTH(b)            (((b) & 0xfe) >> 1)
   #define RFCOMM_MKMCC_TYPE(cr, type)     ((((type) << 2) | ((cr) << 1) | 0x01))
   
   /* RPN macros */
   #define RFCOMM_RPN_DATA_BITS(line)      ((line) & 0x3)
   #define RFCOMM_RPN_STOP_BITS(line)      (((line) >> 2) & 0x1)
   #define RFCOMM_RPN_PARITY(line)         (((line) >> 3) & 0x1)
   
   /*************************************************************************
    *************************************************************************
    **                     SOCK_STREAM RFCOMM sockets                      **
    *************************************************************************
    *************************************************************************/
   
   /* Socket options */
   #define SO_RFCOMM_MTU           1       /* mtu */
   #define SO_RFCOMM_FC_INFO       2       /* flow control info (below) */
   #define SO_RFCOMM_LM            3       /* link mode */
   
   /* Flow control information */
   struct rfcomm_fc_info {
           uint8_t         lmodem;         /* modem signals (local) */
           uint8_t         rmodem;         /* modem signals (remote) */
           uint8_t         tx_cred;        /* TX credits */
           uint8_t         rx_cred;        /* RX credits */
           uint8_t         cfc;            /* credit flow control */
           uint8_t         reserved;
   };
   
   /* RFCOMM link mode flags */
   #define RFCOMM_LM_AUTH          (1<<0)  /* want authentication */
   #define RFCOMM_LM_ENCRYPT       (1<<1)  /* want encryption */
   #define RFCOMM_LM_SECURE        (1<<2)  /* want secured link */
   
   #ifdef _KERNEL
   
   /* sysctl variables */
   extern int rfcomm_sendspace;
   extern int rfcomm_recvspace;
   extern int rfcomm_mtu_default;
   extern int rfcomm_ack_timeout;
   extern int rfcomm_mcc_timeout;
   
   /*
    * Bluetooth RFCOMM session data
    * One L2CAP connection == one RFCOMM session
    */
   
   /* Credit note */
   struct rfcomm_credit {
           struct rfcomm_dlc               *rc_dlc;        /* owner */
           uint16_t                         rc_len;        /* length */
           SIMPLEQ_ENTRY(rfcomm_credit)     rc_next;       /* next credit */
   };
   
   /* RFCOMM session data (one L2CAP channel) */
   struct rfcomm_session {
           struct l2cap_channel            *rs_l2cap;      /* L2CAP pointer */
           uint16_t                         rs_flags;      /* session flags */
           uint16_t                         rs_state;      /* session state */
           uint16_t                         rs_mtu;        /* default MTU */
   
           SIMPLEQ_HEAD(,rfcomm_credit)     rs_credits;    /* credit notes */
           LIST_HEAD(,rfcomm_dlc)           rs_dlcs;       /* DLC list */
   
           struct callout                   rs_timeout;    /* timeout */
   
           LIST_ENTRY(rfcomm_session)       rs_next;       /* next session */
   };
   
   LIST_HEAD(rfcomm_session_list, rfcomm_session);
   extern struct rfcomm_session_list rfcomm_session_active;
   extern struct rfcomm_session_list rfcomm_session_listen;
   
   /* Session state */
   #define RFCOMM_SESSION_CLOSED           0
   #define RFCOMM_SESSION_WAIT_CONNECT     1
   #define RFCOMM_SESSION_OPEN             2
   #define RFCOMM_SESSION_WAIT_DISCONNECT  3
   #define RFCOMM_SESSION_LISTEN           4
   
   /* Session flags */
   #define RFCOMM_SESSION_INITIATOR        (1 << 0) /* we are initiator */
   #define RFCOMM_SESSION_CFC              (1 << 1) /* credit flow control */
   #define RFCOMM_SESSION_LFC              (1 << 2) /* local flow control */
   #define RFCOMM_SESSION_RFC              (1 << 3) /* remote flow control */
   #define RFCOMM_SESSION_FREE             (1 << 4) /* self lock out for free */
   
   #define IS_INITIATOR(rs)        ((rs)->rs_flags & RFCOMM_SESSION_INITIATOR)
   
   /* Bluetooth RFCOMM DLC data (connection) */
   struct rfcomm_dlc {
           struct rfcomm_session   *rd_session; /* RFCOMM session */
           uint8_t                  rd_dlci;    /* RFCOMM DLCI */
   
           uint16_t                 rd_flags;   /* DLC flags */
           uint16_t                 rd_state;   /* DLC state */
           uint16_t                 rd_mtu;     /* MTU */
           int                      rd_mode;    /* link mode */
   
           struct sockaddr_bt       rd_laddr;   /* local address */
           struct sockaddr_bt       rd_raddr;   /* remote address */
   
           uint8_t                  rd_lmodem;  /* local modem signls */
           uint8_t                  rd_rmodem;  /* remote modem signals */
   
           int                      rd_rxcred;  /* receive credits (sent) */
           size_t                   rd_rxsize;  /* receive buffer (bytes, avail) */
           int                      rd_txcred;  /* transmit credits (unused) */
           int                      rd_pending; /* packets sent but not complete */
   
           struct callout           rd_timeout; /* timeout */
           struct mbuf             *rd_txbuf;   /* transmit buffer */
   
           const struct btproto    *rd_proto;   /* upper layer callbacks */
           void                    *rd_upper;   /* upper layer argument */
   
           LIST_ENTRY(rfcomm_dlc)   rd_next;    /* next dlc on session */
   };
   
   /*
    * Credit Flow Control works in the following way.
    *
    * txcred is how many packets we can send. Received credit
    * is added to this value, and it is decremented each time
    * we send a packet.
    *
    * rxsize is the number of bytes that are available in the
    * upstream receive buffer.
    *
    * rxcred is the number of credits that we have previously
    * sent that are still unused. This value will be decreased
    * for each packet we receive and we will add to it when we
    * send credits. We calculate the amount of credits to send
    * by the cunning formula "(space / mtu) - sent" so that if
    * we get a bunch of small packets, we can continue sending
    * credits without risking buffer overflow.
    */
   
   /* DLC flags */
   #define RFCOMM_DLC_DETACH               (1 << 0) /* DLC to be detached */
   #define RFCOMM_DLC_SHUTDOWN             (1 << 1) /* DLC to be shutdown */
   
   /* DLC state */
   #define RFCOMM_DLC_CLOSED               0       /* no session */
   #define RFCOMM_DLC_WAIT_SESSION         1       /* waiting for session */
   #define RFCOMM_DLC_WAIT_CONNECT         2       /* waiting for connect */
   #define RFCOMM_DLC_WAIT_SEND_SABM       3       /* waiting to send SABM */
   #define RFCOMM_DLC_WAIT_SEND_UA         4       /* waiting to send UA */
   #define RFCOMM_DLC_WAIT_RECV_UA         5       /* waiting to receive UA */
   #define RFCOMM_DLC_OPEN                 6       /* can send/receive */
   #define RFCOMM_DLC_WAIT_DISCONNECT      7       /* waiting for disconnect */
   #define RFCOMM_DLC_LISTEN               8       /* listening DLC */
   
   /*
    * Bluetooth RFCOMM socket kernel prototypes
    */
   
   struct socket;
   
   /* rfcomm_dlc.c */
   struct rfcomm_dlc *rfcomm_dlc_lookup(struct rfcomm_session *, int);
   struct rfcomm_dlc *rfcomm_dlc_newconn(struct rfcomm_session *, int);
   void rfcomm_dlc_close(struct rfcomm_dlc *, int);
   void rfcomm_dlc_timeout(void *);
   int rfcomm_dlc_setmode(struct rfcomm_dlc *);
   int rfcomm_dlc_connect(struct rfcomm_dlc *);
   int rfcomm_dlc_open(struct rfcomm_dlc *);
   void rfcomm_dlc_start(struct rfcomm_dlc *);
   
   /* rfcomm_session.c */
   struct rfcomm_session *rfcomm_session_alloc(struct rfcomm_session_list *, struct sockaddr_bt *);
   struct rfcomm_session *rfcomm_session_lookup(struct sockaddr_bt *, struct sockaddr_bt *);
   void rfcomm_session_free(struct rfcomm_session *);
   int rfcomm_session_send_frame(struct rfcomm_session *, int, int);
   int rfcomm_session_send_uih(struct rfcomm_session *, struct rfcomm_dlc *, int, struct mbuf *);
   int rfcomm_session_send_mcc(struct rfcomm_session *, int, uint8_t, void *, int);
   
   /* rfcomm_socket.c */
   int rfcomm_usrreq(struct socket *, int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *);
   int rfcomm_ctloutput(int, struct socket *, int, int, struct mbuf **);
   
   /* rfcomm_upper.c */
   int rfcomm_attach(struct rfcomm_dlc **, const struct btproto *, void *);
   int rfcomm_bind(struct rfcomm_dlc *, struct sockaddr_bt *);
   int rfcomm_sockaddr(struct rfcomm_dlc *, struct sockaddr_bt *);
   int rfcomm_connect(struct rfcomm_dlc *, struct sockaddr_bt *);
   int rfcomm_peeraddr(struct rfcomm_dlc *, struct sockaddr_bt *);
   int rfcomm_disconnect(struct rfcomm_dlc *, int);
   int rfcomm_detach(struct rfcomm_dlc **);
   int rfcomm_listen(struct rfcomm_dlc *);
   int rfcomm_send(struct rfcomm_dlc *, struct mbuf *);
   int rfcomm_rcvd(struct rfcomm_dlc *, size_t);
   int rfcomm_setopt(struct rfcomm_dlc *, int, void *);
   int rfcomm_getopt(struct rfcomm_dlc *, int, void *);
   
   #endif /* _KERNEL */
   
   #endif /* _NETBT_RFCOMM_H_ */

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