a5c89047c0
NetBSD Foundation Membership still pending.) This stack was written by Iain under sponsorship from Itronix Inc. The stack includes support for rfcomm networking (networking via your bluetooth enabled cell phone), hid devices (keyboards/mice), and headsets. Drivers for both PCMCIA and USB bluetooth controllers are included.
372 lines
9.4 KiB
Groff
372 lines
9.4 KiB
Groff
.\" $NetBSD: bluetooth.3,v 1.1 2006/06/19 15:44:36 gdamore Exp $
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.\"
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.\" Copyright (c) 2003 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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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: bluetooth.3,v 1.1 2006/06/19 15:44:36 gdamore Exp $
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.\" $FreeBSD: src/lib/libbluetooth/bluetooth.3,v 1.7 2005/01/21 10:26:11 ru Exp $
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.\"
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.Dd May 7, 2003
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.Dt BLUETOOTH 3
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.Os
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.Sh NAME
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.Nm bt_gethostbyname ,
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.Nm bt_gethostbyaddr ,
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.Nm bt_gethostent ,
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.Nm bt_sethostent ,
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.Nm bt_endhostent ,
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.Nm bt_getprotobyname ,
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.Nm bt_getprotobynumber ,
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.Nm bt_getprotoent ,
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.Nm bt_setprotoent ,
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.Nm bt_endprotoent ,
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.Nm bt_aton ,
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.Nm bt_ntoa ,
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.Nm bt_devaddr ,
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.Nm bt_devname ,
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.Nm bt_openconfig ,
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.Nm bt_getconfig ,
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.Nm bt_freeconfig ,
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.Nm bt_eachconfig ,
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.Nm bt_closeconfig ,
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.Nm bt_printconfig
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.Nd Bluetooth routines
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.Sh LIBRARY
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.Lb libbluetooth
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.Sh SYNOPSIS
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.In bluetooth.h
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.Ft struct hostent *
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.Fn bt_gethostbyname "const char *name"
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.Ft struct hostent *
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.Fn bt_gethostbyaddr "const char *addr" "int len" "int type"
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.Ft struct hostent *
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.Fn bt_gethostent void
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.Ft void
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.Fn bt_sethostent "int stayopen"
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.Ft void
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.Fn bt_endhostent void
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.Ft struct protoent *
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.Fn bt_getprotobyname "const char *name"
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.Ft struct protoent *
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.Fn bt_getprotobynumber "int proto"
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.Ft struct protoent *
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.Fn bt_getprotoent void
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.Ft void
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.Fn bt_setprotoent "int stayopen"
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.Ft void
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.Fn bt_endprotoent void
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.Ft int
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.Fn bt_aton "const char *str" "bdaddr_t *ba"
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.Ft const char *
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.Fn bt_ntoa "const bdaddr_t *ba" "char *str"
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.Ft int
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.Fn bt_devaddr "const char *name" "bdaddr_t *addr"
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.Ft int
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.Fn bt_devname "char *name" "const bdaddr_t *addr"
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.Ft bt_handle_t
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.Fn bt_openconfig "const char *name"
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.Ft bt_cfgentry_t
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.Fn bt_getconfig "bt_handle_t handle" "const bdaddr_t *ba"
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.Ft int
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.Fn bt_eachconfig "bt_handle_t handle" "void (*func)(bt_cfgentry_t *, void *)" "void *arg"
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.Ft void
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.Fn bt_freeconfig "bt_cfgentry_t *cfg"
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.Ft int
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.Fn bt_closeconfig "bt_handle_t handle"
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.Ft int
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.Fn bt_printconfig "FILE *fp" "bt_cfgentry_t *cfg"
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.Sh DESCRIPTION
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The
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.Fn bt_gethostent ,
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.Fn bt_gethostbyname
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and
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.Fn bt_gethostbyaddr
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functions
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each return a pointer to an object with the
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.Vt hostent
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structure describing a Bluetooth host
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referenced by name or by address, respectively.
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.Pp
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The
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.Fa name
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argument passed to
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.Fn bt_gethostbyname
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should point to a
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.Dv NUL Ns -terminated
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hostname.
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The
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.Fa addr
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argument passed to
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.Fn bt_gethostbyaddr
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should point to an address which is
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.Fa len
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bytes long,
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in binary form
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(i.e., not a Bluetooth BD_ADDR in human readable
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.Tn ASCII
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form).
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The
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.Fa type
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argument specifies the address family of this address and must be set to
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.Dv AF_BLUETOOTH .
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.Pp
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The structure returned contains the information obtained from a line in
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.Pa /etc/bluetooth/hosts
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file.
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.Pp
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The
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.Fn bt_sethostent
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function controls whether
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.Pa /etc/bluetooth/hosts
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file should stay open after each call to
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.Fn bt_gethostbyname
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or
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.Fn bt_gethostbyaddr .
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If the
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.Fa stayopen
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flag is non-zero, the file will not be closed.
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.Pp
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The
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.Fn bt_endhostent
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function closes the
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.Pa /etc/bluetooth/hosts
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file.
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.Pp
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The
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.Fn bt_getprotoent ,
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.Fn bt_getprotobyname
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and
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.Fn bt_getprotobynumber
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functions each return a pointer to an object with the
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.Vt protoent
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structure describing a Bluetooth Protocol Service Multiplexor referenced
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by name or number, respectively.
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.Pp
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The
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.Fa name
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argument passed to
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.Fn bt_getprotobyname
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should point to a
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.Dv NUL Ns -terminated
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Bluetooth Protocol Service Multiplexor name.
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The
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.Fa proto
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argument passed to
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.Fn bt_getprotobynumber
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should have numeric value of the desired Bluetooth Protocol Service Multiplexor.
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.Pp
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The structure returned contains the information obtained from a line in
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.Pa /etc/bluetooth/protocols
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file.
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.Pp
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The
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.Fn bt_setprotoent
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function controls whether
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.Pa /etc/bluetooth/protocols
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file should stay open after each call to
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.Fn bt_getprotobyname
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or
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.Fn bt_getprotobynumber .
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If the
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.Fa stayopen
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flag is non-zero, the file will not be closed.
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.Pp
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The
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.Fn bt_endprotoent
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function closes the
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.Pa /etc/bluetooth/protocols
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file.
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.Pp
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The
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.Fn bt_aton
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routine interprets the specified character string as a Bluetooth address,
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placing the address into the structure provided.
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It returns 1 if the string was successfully interpreted,
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or 0 if the string is invalid.
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.Pp
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The routine
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.Fn bt_ntoa
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takes a Bluetooth address and places an
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.Tn ASCII
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string representing the address into the buffer provided.
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It is up to the caller to ensure that provided buffer has enough space.
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If no buffer was provided then an internal static buffer will be used.
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.Pp
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The
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.Fn bt_devaddr
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function interprets the specified character string as the
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address or device name of a Bluetooth device on the local system, and
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places the device address in the structure provided, if any.
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It returns 1 if the string was successfully interpreted,
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or 0 if the string did not match any local device. The
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.Fn bt_devname
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function takes a Bluetooth device address and copies the local device
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name associated with that address into the buffer provided, if any.
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It returns 1 when the device was found, otherwise 0.
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.Pp
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The
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.Fn bt_openconfig ,
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.Fn bt_getconfig ,
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.Fn bt_eachconfig ,
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and
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.Fn bt_closeconfig
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functions can be used to extract configuration entries from files in the
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.Xr bluetooth.conf 5
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file format. If
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.Dv NULL
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is specified as the file name to
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.Fn bt_openconfig ,
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the default file name of
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.Pa /etc/bluetooth/bluetooth.conf
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will be used.
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.Fn bt_getconfig
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will scan the config file for a matching BD_ADDR and return a
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pointer to a dynamically allocated
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.Ar bt_cfgentry_t
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structure which must be freed with
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.Fn bt_freeconfig .
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The
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.Fn bt_eachconfig
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function can be used to iterate through all entries in the config file,
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with each config entry being passed to the given function in turn, then
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freed automatically.
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.Pp
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The
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.Fn bt_printconfig
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function will print a config entry to the file pointer
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in a format compatible with reading it later.
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.Sh FILES
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.Bl -tag -width ".Pa /etc/bluetooth/hosts" -compact
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.It Pa /etc/bluetooth/bluetooth.conf
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.It Pa /etc/bluetooth/hosts
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.It Pa /etc/bluetooth/protocols
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.El
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.Sh EXAMPLES
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Print out the hostname associated with a specific BD_ADDR:
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.Bd -literal -offset indent
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const char *bdstr = "00:01:02:03:04:05";
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bdaddr_t bd;
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struct hostent *hp;
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if (!bt_aton(bdstr, &bd))
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errx(1, "can't parse BD_ADDR %s", bdstr);
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if ((hp = bt_gethostbyaddr((const char *)&bd,
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sizeof(bd), AF_BLUETOOTH)) == NULL)
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errx(1, "no name associated with %s", bdstr);
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printf("name associated with %s is %s\en", bdstr, hp->h_name);
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.Ed
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.Sh DIAGNOSTICS
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Error return status from
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.Fn bt_gethostent ,
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.Fn bt_gethostbyname
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and
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.Fn bt_gethostbyaddr
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is indicated by return of a
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.Dv NULL
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pointer.
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The external integer
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.Va h_errno
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may then be checked to see whether this is a temporary failure
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or an invalid or unknown host.
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The routine
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.Xr herror 3
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can be used to print an error message describing the failure.
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If its argument
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.Fa string
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is
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.Pf non- Dv NULL ,
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it is printed, followed by a colon and a space.
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The error message is printed with a trailing newline.
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.Pp
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The variable
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.Va h_errno
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can have the following values:
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.Bl -tag -width ".Dv HOST_NOT_FOUND"
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.It Dv HOST_NOT_FOUND
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No such host is known.
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.It Dv NO_RECOVERY
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Some unexpected server failure was encountered.
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This is a non-recoverable error.
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.El
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.Pp
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The
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.Fn bt_getprotoent ,
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.Fn bt_getprotobyname
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and
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.Fn bt_getprotobynumber
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return
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.Dv NULL
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on EOF or error.
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.Sh SEE ALSO
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.Xr bluetooth.conf 5 ,
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.Xr gethostbyaddr 3 ,
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.Xr gethostbyname 3 ,
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.Xr getprotobyname 3 ,
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.Xr getprotobynumber 3 ,
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.Xr herror 3 ,
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.Xr inet_aton 3 ,
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.Xr inet_ntoa 3
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.Sh CAVEAT
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The
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.Fn bt_gethostent
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function reads the next line of
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.Pa /etc/bluetooth/hosts ,
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opening the file if necessary.
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.Pp
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The
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.Fn bt_sethostent
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function opens and/or rewinds the
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.Pa /etc/bluetooth/hosts
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file.
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.Pp
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The
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.Fn bt_getprotoent
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function reads the next line of
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.Pa /etc/bluetooth/protocols ,
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opening the file if necessary.
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.Pp
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The
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.Fn bt_setprotoent
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function opens and/or rewinds the
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.Pa /etc/bluetooth/protocols
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file.
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.Sh AUTHORS
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.An Maksim Yevmenkin Aq m_evmenkin@yahoo.com
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.An Iain Hibbert
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.Sh BUGS
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These functions use static data storage;
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if the data is needed for future use, it should be
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copied before any subsequent calls overwrite it.
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.Sh HISTORY
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.Nm libbluetooth
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first appeard in
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.Fx
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was ported to
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.Nx 4.0
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and extended by
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.An Iain Hibbert
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for Itronix, Inc.
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