The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/netbt/rfcomm.h

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    1 /*      $OpenBSD: rfcomm.h,v 1.4 2008/11/22 04:42:58 uwe Exp $  */
    2 /*      $NetBSD: rfcomm.h,v 1.8 2008/09/08 23:36:55 gmcgarry Exp $      */
    3 
    4 /*-
    5  * Copyright (c) 2006 Itronix Inc.
    6  * All rights reserved.
    7  *
    8  * Written by Iain Hibbert for Itronix Inc.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. The name of Itronix Inc. may not be used to endorse
   19  *    or promote products derived from this software without specific
   20  *    prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   24  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   25  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
   26  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   27  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   29  * ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   32  * POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 /*-
   35  * Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
   36  * All rights reserved.
   37  *
   38  * Redistribution and use in source and binary forms, with or without
   39  * modification, are permitted provided that the following conditions
   40  * are met:
   41  * 1. Redistributions of source code must retain the above copyright
   42  *    notice, this list of conditions and the following disclaimer.
   43  * 2. Redistributions in binary form must reproduce the above copyright
   44  *    notice, this list of conditions and the following disclaimer in the
   45  *    documentation and/or other materials provided with the distribution.
   46  *
   47  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   48  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   50  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   51  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   52  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   53  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   54  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   55  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   56  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   57  * SUCH DAMAGE.
   58  *
   59  * $Id: rfcomm.h,v 1.4 2008/11/22 04:42:58 uwe Exp $
   60  * $FreeBSD: src/sys/netgraph/bluetooth/include/ng_btsocket_rfcomm.h,v 1.4 2005/01/11 01:39:53 emax Exp $
   61  */
   62 
   63 #ifndef _NETBT_RFCOMM_H_
   64 #define _NETBT_RFCOMM_H_
   65 
   66 #include <sys/types.h>
   67 
   68 /*************************************************************************
   69  *************************************************************************
   70  **                             RFCOMM                                  **
   71  *************************************************************************
   72  *************************************************************************/
   73 
   74 #define RFCOMM_MTU_MAX                  32767
   75 #define RFCOMM_MTU_MIN                  23
   76 #define RFCOMM_MTU_DEFAULT              127
   77 
   78 #define RFCOMM_CREDITS_MAX              255     /* in any single packet */
   79 #define RFCOMM_CREDITS_DEFAULT          7       /* default initial value */
   80 
   81 #define RFCOMM_CHANNEL_ANY              0
   82 #define RFCOMM_CHANNEL_MIN              1
   83 #define RFCOMM_CHANNEL_MAX              30
   84 
   85 /* RFCOMM frame types */
   86 #define RFCOMM_FRAME_SABM               0x2f
   87 #define RFCOMM_FRAME_DISC               0x43
   88 #define RFCOMM_FRAME_UA                 0x63
   89 #define RFCOMM_FRAME_DM                 0x0f
   90 #define RFCOMM_FRAME_UIH                0xef
   91 
   92 /* RFCOMM MCC commands */
   93 #define RFCOMM_MCC_TEST                 0x08    /* Test */
   94 #define RFCOMM_MCC_FCON                 0x28    /* Flow Control on */
   95 #define RFCOMM_MCC_FCOFF                0x18    /* Flow Control off */
   96 #define RFCOMM_MCC_MSC                  0x38    /* Modem Status Command */
   97 #define RFCOMM_MCC_RPN                  0x24    /* Remote Port Negotiation */
   98 #define RFCOMM_MCC_RLS                  0x14    /* Remote Line Status */
   99 #define RFCOMM_MCC_PN                   0x20    /* Port Negotiation */
  100 #define RFCOMM_MCC_NSC                  0x04    /* Non Supported Command */
  101 
  102 /* RFCOMM modem signals */
  103 #define RFCOMM_MSC_FC                   0x02    /* Flow Control asserted */
  104 #define RFCOMM_MSC_RTC                  0x04    /* Ready To Communicate */
  105 #define RFCOMM_MSC_RTR                  0x08    /* Ready To Receive */
  106 #define RFCOMM_MSC_IC                   0x40    /* Incomming Call (RING) */
  107 #define RFCOMM_MSC_DV                   0x80    /* Data Valid */
  108 
  109 /* RPN parameters - baud rate */
  110 #define RFCOMM_RPN_BR_2400              0x0
  111 #define RFCOMM_RPN_BR_4800              0x1
  112 #define RFCOMM_RPN_BR_7200              0x2
  113 #define RFCOMM_RPN_BR_9600              0x3
  114 #define RFCOMM_RPN_BR_19200             0x4
  115 #define RFCOMM_RPN_BR_38400             0x5
  116 #define RFCOMM_RPN_BR_57600             0x6
  117 #define RFCOMM_RPN_BR_115200            0x7
  118 #define RFCOMM_RPN_BR_230400            0x8
  119 
  120 /* RPN parameters - data bits */
  121 #define RFCOMM_RPN_DATA_5               0x0
  122 #define RFCOMM_RPN_DATA_6               0x1
  123 #define RFCOMM_RPN_DATA_7               0x2
  124 #define RFCOMM_RPN_DATA_8               0x3
  125 
  126 /* RPN parameters - stop bit */
  127 #define RFCOMM_RPN_STOP_1               0
  128 #define RFCOMM_RPN_STOP_15              1
  129 
  130 /* RPN parameters - parity enable */
  131 #define RFCOMM_RPN_PARITY_NONE          0x0
  132 
  133 /* RPN parameters - parity type */
  134 #define RFCOMM_RPN_PARITY_ODD           0x0
  135 #define RFCOMM_RPN_PARITY_EVEN          0x1
  136 #define RFCOMM_RPN_PARITY_MARK          0x2
  137 #define RFCOMM_RPN_PARITY_SPACE         0x3
  138 
  139 /* RPN parameters - default line_setting */
  140 #define RFCOMM_RPN_8_N_1                0x03
  141 
  142 /* RPN parameters - flow control */
  143 #define RFCOMM_RPN_XON_CHAR             0x11
  144 #define RFCOMM_RPN_XOFF_CHAR            0x13
  145 #define RFCOMM_RPN_FLOW_NONE            0x00
  146 
  147 /* RPN parameters - mask */
  148 #define RFCOMM_RPN_PM_RATE              0x0001
  149 #define RFCOMM_RPN_PM_DATA              0x0002
  150 #define RFCOMM_RPN_PM_STOP              0x0004
  151 #define RFCOMM_RPN_PM_PARITY            0x0008
  152 #define RFCOMM_RPN_PM_PTYPE             0x0010
  153 #define RFCOMM_RPN_PM_XON               0x0020
  154 #define RFCOMM_RPN_PM_XOFF              0x0040
  155 
  156 #define RFCOMM_RPN_PM_FLOW              0x3f00
  157 
  158 #define RFCOMM_RPN_PM_ALL               0x3f7f
  159 
  160 /* RFCOMM command frame header */
  161 struct rfcomm_cmd_hdr
  162 {
  163         uint8_t         address;
  164         uint8_t         control;
  165         uint8_t         length;
  166         uint8_t         fcs;
  167 } __packed;
  168 
  169 /* RFCOMM MSC command */
  170 struct rfcomm_mcc_msc
  171 {
  172         uint8_t         address;
  173         uint8_t         modem;
  174         uint8_t         brk;
  175 } __packed;
  176 
  177 /* RFCOMM RPN command */
  178 struct rfcomm_mcc_rpn
  179 {
  180         uint8_t         dlci;
  181         uint8_t         bit_rate;
  182         uint8_t         line_settings;
  183         uint8_t         flow_control;
  184         uint8_t         xon_char;
  185         uint8_t         xoff_char;
  186         uint16_t        param_mask;
  187 } __packed;
  188 
  189 /* RFCOMM RLS command */
  190 struct rfcomm_mcc_rls
  191 {
  192         uint8_t         address;
  193         uint8_t         status;
  194 } __packed;
  195 
  196 /* RFCOMM PN command */
  197 struct rfcomm_mcc_pn
  198 {
  199         uint8_t         dlci;
  200         uint8_t         flow_control;
  201         uint8_t         priority;
  202         uint8_t         ack_timer;
  203         uint16_t        mtu;
  204         uint8_t         max_retrans;
  205         uint8_t         credits;
  206 } __packed;
  207 
  208 /* RFCOMM frame parsing macros */
  209 #define RFCOMM_DLCI(b)                  (((b) & 0xfc) >> 2)
  210 #define RFCOMM_TYPE(b)                  (((b) & 0xef))
  211 
  212 #define RFCOMM_EA(b)                    (((b) & 0x01))
  213 #define RFCOMM_CR(b)                    (((b) & 0x02) >> 1)
  214 #define RFCOMM_PF(b)                    (((b) & 0x10) >> 4)
  215 
  216 #define RFCOMM_CHANNEL(dlci)            (((dlci) >> 1) & 0x2f)
  217 #define RFCOMM_DIRECTION(dlci)          ((dlci) & 0x1)
  218 
  219 #define RFCOMM_MKADDRESS(cr, dlci) \
  220         ((((dlci) & 0x3f) << 2) | ((cr) << 1) | 0x01)
  221 
  222 #define RFCOMM_MKCONTROL(type, pf)      ((((type) & 0xef) | ((pf) << 4)))
  223 #define RFCOMM_MKDLCI(dir, channel)     ((((channel) & 0x1f) << 1) | (dir))
  224 
  225 /* RFCOMM MCC macros */
  226 #define RFCOMM_MCC_TYPE(b)              (((b) & 0xfc) >> 2)
  227 #define RFCOMM_MCC_LENGTH(b)            (((b) & 0xfe) >> 1)
  228 #define RFCOMM_MKMCC_TYPE(cr, type)     ((((type) << 2) | ((cr) << 1) | 0x01))
  229 
  230 /* RPN macros */
  231 #define RFCOMM_RPN_DATA_BITS(line)      ((line) & 0x3)
  232 #define RFCOMM_RPN_STOP_BITS(line)      (((line) >> 2) & 0x1)
  233 #define RFCOMM_RPN_PARITY(line)         (((line) >> 3) & 0x1)
  234 
  235 /*************************************************************************
  236  *************************************************************************
  237  **                     SOCK_STREAM RFCOMM sockets                      **
  238  *************************************************************************
  239  *************************************************************************/
  240 
  241 /* Socket options */
  242 #define SO_RFCOMM_MTU           1       /* mtu */
  243 #define SO_RFCOMM_FC_INFO       2       /* flow control info (below) */
  244 #define SO_RFCOMM_LM            3       /* link mode */
  245 
  246 /* Flow control information */
  247 struct rfcomm_fc_info {
  248         uint8_t         lmodem;         /* modem signals (local) */
  249         uint8_t         rmodem;         /* modem signals (remote) */
  250         uint8_t         tx_cred;        /* TX credits */
  251         uint8_t         rx_cred;        /* RX credits */
  252         uint8_t         cfc;            /* credit flow control */
  253         uint8_t         reserved;
  254 };
  255 
  256 /* RFCOMM link mode flags */
  257 #define RFCOMM_LM_AUTH          (1<<0)  /* want authentication */
  258 #define RFCOMM_LM_ENCRYPT       (1<<1)  /* want encryption */
  259 #define RFCOMM_LM_SECURE        (1<<2)  /* want secured link */
  260 
  261 #ifdef _KERNEL
  262 
  263 /* sysctl variables */
  264 extern int rfcomm_sendspace;
  265 extern int rfcomm_recvspace;
  266 extern int rfcomm_mtu_default;
  267 extern int rfcomm_ack_timeout;
  268 extern int rfcomm_mcc_timeout;
  269 
  270 /*
  271  * Bluetooth RFCOMM session data
  272  * One L2CAP connection == one RFCOMM session
  273  */
  274 
  275 /* Credit note */
  276 struct rfcomm_credit {
  277         struct rfcomm_dlc               *rc_dlc;        /* owner */
  278         uint16_t                         rc_len;        /* length */
  279         SIMPLEQ_ENTRY(rfcomm_credit)     rc_next;       /* next credit */
  280 };
  281 
  282 /* RFCOMM session data (one L2CAP channel) */
  283 struct rfcomm_session {
  284         struct l2cap_channel            *rs_l2cap;      /* L2CAP pointer */
  285         uint16_t                         rs_flags;      /* session flags */
  286         uint16_t                         rs_state;      /* session state */
  287         uint16_t                         rs_mtu;        /* default MTU */
  288 
  289         SIMPLEQ_HEAD(,rfcomm_credit)     rs_credits;    /* credit notes */
  290         LIST_HEAD(,rfcomm_dlc)           rs_dlcs;       /* DLC list */
  291 
  292         struct timeout                   rs_timeout;    /* timeout */
  293 
  294         LIST_ENTRY(rfcomm_session)       rs_next;       /* next session */
  295 };
  296 
  297 LIST_HEAD(rfcomm_session_list, rfcomm_session);
  298 extern struct rfcomm_session_list rfcomm_session_active;
  299 extern struct rfcomm_session_list rfcomm_session_listen;
  300 
  301 /* Session state */
  302 #define RFCOMM_SESSION_CLOSED           0
  303 #define RFCOMM_SESSION_WAIT_CONNECT     1
  304 #define RFCOMM_SESSION_OPEN             2
  305 #define RFCOMM_SESSION_WAIT_DISCONNECT  3
  306 #define RFCOMM_SESSION_LISTEN           4
  307 
  308 /* Session flags */
  309 #define RFCOMM_SESSION_INITIATOR        (1 << 0) /* we are initiator */
  310 #define RFCOMM_SESSION_CFC              (1 << 1) /* credit flow control */
  311 #define RFCOMM_SESSION_LFC              (1 << 2) /* local flow control */
  312 #define RFCOMM_SESSION_RFC              (1 << 3) /* remote flow control */
  313 #define RFCOMM_SESSION_FREE             (1 << 4) /* self lock out for free */
  314 
  315 #define IS_INITIATOR(rs)        ((rs)->rs_flags & RFCOMM_SESSION_INITIATOR)
  316 
  317 /* Bluetooth RFCOMM DLC data (connection) */
  318 struct rfcomm_dlc {
  319         struct rfcomm_session   *rd_session; /* RFCOMM session */
  320         uint8_t                  rd_dlci;    /* RFCOMM DLCI */
  321 
  322         uint16_t                 rd_flags;   /* DLC flags */
  323         uint16_t                 rd_state;   /* DLC state */
  324         uint16_t                 rd_mtu;     /* MTU */
  325         int                      rd_mode;    /* link mode */
  326 
  327         struct sockaddr_bt       rd_laddr;   /* local address */
  328         struct sockaddr_bt       rd_raddr;   /* remote address */
  329 
  330         uint8_t                  rd_lmodem;  /* local modem signls */
  331         uint8_t                  rd_rmodem;  /* remote modem signals */
  332 
  333         int                      rd_rxcred;  /* receive credits (sent) */
  334         size_t                   rd_rxsize;  /* receive buffer (bytes, avail) */
  335         int                      rd_txcred;  /* transmit credits (unused) */
  336         int                      rd_pending; /* packets sent but not complete */
  337 
  338         struct timeout           rd_timeout; /* timeout */
  339         struct mbuf             *rd_txbuf;   /* transmit buffer */
  340 
  341         const struct btproto    *rd_proto;   /* upper layer callbacks */
  342         void                    *rd_upper;   /* upper layer argument */
  343 
  344         LIST_ENTRY(rfcomm_dlc)   rd_next;    /* next dlc on session */
  345 };
  346 
  347 /*
  348  * Credit Flow Control works in the following way.
  349  *
  350  * txcred is how many packets we can send. Received credit
  351  * is added to this value, and it is decremented each time
  352  * we send a packet.
  353  *
  354  * rxsize is the number of bytes that are available in the
  355  * upstream receive buffer.
  356  *
  357  * rxcred is the number of credits that we have previously
  358  * sent that are still unused. This value will be decreased
  359  * for each packet we receive and we will add to it when we
  360  * send credits. We calculate the amount of credits to send
  361  * by the cunning formula "(space / mtu) - sent" so that if
  362  * we get a bunch of small packets, we can continue sending
  363  * credits without risking buffer overflow.
  364  */
  365 
  366 /* DLC flags */
  367 #define RFCOMM_DLC_DETACH               (1 << 0) /* DLC to be detached */
  368 #define RFCOMM_DLC_SHUTDOWN             (1 << 1) /* DLC to be shutdown */
  369 
  370 /* DLC state */
  371 #define RFCOMM_DLC_CLOSED               0       /* no session */
  372 #define RFCOMM_DLC_WAIT_SESSION         1       /* waiting for session */
  373 #define RFCOMM_DLC_WAIT_CONNECT         2       /* waiting for connect */
  374 #define RFCOMM_DLC_WAIT_SEND_SABM       3       /* waiting to send SABM */
  375 #define RFCOMM_DLC_WAIT_SEND_UA         4       /* waiting to send UA */
  376 #define RFCOMM_DLC_WAIT_RECV_UA         5       /* waiting to receive UA */
  377 #define RFCOMM_DLC_OPEN                 6       /* can send/receive */
  378 #define RFCOMM_DLC_WAIT_DISCONNECT      7       /* waiting for disconnect */
  379 #define RFCOMM_DLC_LISTEN               8       /* listening DLC */
  380 
  381 /*
  382  * Bluetooth RFCOMM socket kernel prototypes
  383  */
  384 
  385 struct socket;
  386 
  387 /* rfcomm_dlc.c */
  388 struct rfcomm_dlc *rfcomm_dlc_lookup(struct rfcomm_session *, int);
  389 struct rfcomm_dlc *rfcomm_dlc_newconn(struct rfcomm_session *, int);
  390 void rfcomm_dlc_close(struct rfcomm_dlc *, int);
  391 void rfcomm_dlc_timeout(void *);
  392 int rfcomm_dlc_setmode(struct rfcomm_dlc *);
  393 int rfcomm_dlc_connect(struct rfcomm_dlc *);
  394 int rfcomm_dlc_open(struct rfcomm_dlc *);
  395 void rfcomm_dlc_start(struct rfcomm_dlc *);
  396 
  397 /* rfcomm_session.c */
  398 void rfcomm_init(void);
  399 struct rfcomm_session *rfcomm_session_alloc(struct rfcomm_session_list *, struct sockaddr_bt *);
  400 struct rfcomm_session *rfcomm_session_lookup(struct sockaddr_bt *, struct sockaddr_bt *);
  401 void rfcomm_session_free(struct rfcomm_session *);
  402 int rfcomm_session_send_frame(struct rfcomm_session *, int, int);
  403 int rfcomm_session_send_uih(struct rfcomm_session *, struct rfcomm_dlc *, int, struct mbuf *);
  404 int rfcomm_session_send_mcc(struct rfcomm_session *, int, uint8_t, void *, int);
  405 
  406 /* rfcomm_socket.c */
  407 int rfcomm_usrreq(struct socket *, int, struct mbuf *, struct mbuf *,
  408     struct mbuf *, struct proc *);
  409 int rfcomm_ctloutput(int, struct socket *, int, int, struct mbuf **);
  410 
  411 /* rfcomm_upper.c */
  412 int rfcomm_attach(struct rfcomm_dlc **, const struct btproto *, void *);
  413 int rfcomm_bind(struct rfcomm_dlc *, struct sockaddr_bt *);
  414 int rfcomm_sockaddr(struct rfcomm_dlc *, struct sockaddr_bt *);
  415 int rfcomm_connect(struct rfcomm_dlc *, struct sockaddr_bt *);
  416 int rfcomm_peeraddr(struct rfcomm_dlc *, struct sockaddr_bt *);
  417 int rfcomm_disconnect(struct rfcomm_dlc *, int);
  418 int rfcomm_detach(struct rfcomm_dlc **);
  419 int rfcomm_listen(struct rfcomm_dlc *);
  420 int rfcomm_send(struct rfcomm_dlc *, struct mbuf *);
  421 int rfcomm_rcvd(struct rfcomm_dlc *, size_t);
  422 int rfcomm_setopt(struct rfcomm_dlc *, int, void *);
  423 int rfcomm_getopt(struct rfcomm_dlc *, int, void *);
  424 
  425 #endif /* _KERNEL */
  426 
  427 #endif /* _NETBT_RFCOMM_H_ */

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