mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
2b7af31cf5
PR: 191174 Submitted by: Franco Fichtner <franco at lastsummer.de>
728 lines
17 KiB
Groff
728 lines
17 KiB
Groff
.\" Copyright (c) 2003-2009 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: bluetooth.3,v 1.5 2003/05/20 23:04:30 max Exp $
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 9, 2009
|
|
.Dt BLUETOOTH 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm bt_gethostbyname ,
|
|
.Nm bt_gethostbyaddr ,
|
|
.Nm bt_gethostent ,
|
|
.Nm bt_sethostent ,
|
|
.Nm bt_endhostent ,
|
|
.Nm bt_getprotobyname ,
|
|
.Nm bt_getprotobynumber ,
|
|
.Nm bt_getprotoent ,
|
|
.Nm bt_setprotoent ,
|
|
.Nm bt_endprotoent ,
|
|
.Nm bt_aton ,
|
|
.Nm bt_ntoa ,
|
|
.Nm bt_devaddr ,
|
|
.Nm bt_devname ,
|
|
.Nm bt_devinfo ,
|
|
.Nm bt_devenum ,
|
|
.Nm bt_devopen ,
|
|
.Nm bt_devclose ,
|
|
.Nm bt_devsend ,
|
|
.Nm bt_devrecv ,
|
|
.Nm bt_devreq ,
|
|
.Nm bt_devfilter ,
|
|
.Nm bt_devfilter_pkt_set ,
|
|
.Nm bt_devfilter_pkt_clr ,
|
|
.Nm bt_devfilter_pkt_tst ,
|
|
.Nm bt_devfilter_evt_set ,
|
|
.Nm bt_devfilter_evt_clr ,
|
|
.Nm bt_devfilter_evt_tst ,
|
|
.Nm bt_devinquiry ,
|
|
.Nm bdaddr_same ,
|
|
.Nm bdaddr_any ,
|
|
.Nm bdaddr_copy
|
|
.Nd Bluetooth routines
|
|
.Sh LIBRARY
|
|
.Lb libbluetooth
|
|
.Sh SYNOPSIS
|
|
.In bluetooth.h
|
|
.Ft struct hostent *
|
|
.Fn bt_gethostbyname "const char *name"
|
|
.Ft struct hostent *
|
|
.Fn bt_gethostbyaddr "const char *addr" "int len" "int type"
|
|
.Ft struct hostent *
|
|
.Fn bt_gethostent void
|
|
.Ft void
|
|
.Fn bt_sethostent "int stayopen"
|
|
.Ft void
|
|
.Fn bt_endhostent void
|
|
.Ft struct protoent *
|
|
.Fn bt_getprotobyname "const char *name"
|
|
.Ft struct protoent *
|
|
.Fn bt_getprotobynumber "int proto"
|
|
.Ft struct protoent *
|
|
.Fn bt_getprotoent void
|
|
.Ft void
|
|
.Fn bt_setprotoent "int stayopen"
|
|
.Ft void
|
|
.Fn bt_endprotoent void
|
|
.Ft int
|
|
.Fn bt_aton "const char *str" "bdaddr_t *ba"
|
|
.Ft const char *
|
|
.Fn bt_ntoa "const bdaddr_t *ba" "char *str"
|
|
.Ft int
|
|
.Fn bt_devaddr "const char *devname" "bdaddr_t *addr"
|
|
.Ft int
|
|
.Fn bt_devname "char *devname" "const bdaddr_t *addr"
|
|
.Ft int
|
|
.Fn (bt_devenum_cb_t) "int s" "struct bt_devinfo const *di" "void *arg"
|
|
.Ft int
|
|
.Fn bt_devinfo "struct bt_devinfo *di"
|
|
.Ft int
|
|
.Fn bt_devenum "bt_devenum_cb_t *cb" "void *arg"
|
|
.Ft int
|
|
.Fn bt_devopen "char const *devname"
|
|
.Ft int
|
|
.Fn bt_devclose "int s"
|
|
.Ft int
|
|
.Fn bt_devsend "int s" "uint16_t opcode" "void *param" "size_t plen"
|
|
.Ft ssize_t
|
|
.Fn bt_devrecv "int s" "void *buf" "size_t size" "time_t to"
|
|
.Ft int
|
|
.Fn bt_devreq "int s" "struct bt_devreq *r" "time_t to"
|
|
.Ft int
|
|
.Fn bt_devfilter "int s" "struct bt_devfilter const *new" "struct bt_devfilter *old"
|
|
.Ft void
|
|
.Fn bt_devfilter_pkt_set "struct bt_devfilter *filter" "uint8_t type"
|
|
.Ft void
|
|
.Fn bt_devfilter_pkt_clt "struct bt_devfilter *filter" "uint8_t type"
|
|
.Ft int
|
|
.Fn bt_devfilter_pkt_tst "struct bt_devfilter const *filter" "uint8_t type"
|
|
.Ft void
|
|
.Fn bt_devfilter_evt_set "struct bt_devfilter *filter" "uint8_t event"
|
|
.Ft void
|
|
.Fn bt_devfilter_evt_clt "struct bt_devfilter *filter" "uint8_t event"
|
|
.Ft int
|
|
.Fn bt_devfilter_evt_tst "struct bt_devfilter const *filter" "uint8_t event"
|
|
.Ft int
|
|
.Fn bt_devinquiry "char const *devname" "time_t length" "int num_rsp" "struct bt_devinquiry **ii"
|
|
.Ft int
|
|
.Fn bdaddr_same "const bdaddr_t *a" "const bdaddr_t *b"
|
|
.Ft int
|
|
.Fn bdaddr_any "const bdaddr_t *a"
|
|
.Ft int
|
|
.Fn bdaddr_copy "const bdaddr_t *dst" "const bdaddr_t *src"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn bt_gethostent ,
|
|
.Fn bt_gethostbyname
|
|
and
|
|
.Fn bt_gethostbyaddr
|
|
functions
|
|
each return a pointer to an object with the
|
|
.Vt hostent
|
|
structure describing a Bluetooth host
|
|
referenced by name or by address, respectively.
|
|
.Pp
|
|
The
|
|
.Fa name
|
|
argument passed to
|
|
.Fn bt_gethostbyname
|
|
should point to a
|
|
.Dv NUL Ns -terminated
|
|
hostname.
|
|
The
|
|
.Fa addr
|
|
argument passed to
|
|
.Fn bt_gethostbyaddr
|
|
should point to an address which is
|
|
.Fa len
|
|
bytes long,
|
|
in binary form
|
|
(i.e., not a Bluetooth BD_ADDR in human readable
|
|
.Tn ASCII
|
|
form).
|
|
The
|
|
.Fa type
|
|
argument specifies the address family of this address and must be set to
|
|
.Dv AF_BLUETOOTH .
|
|
.Pp
|
|
The structure returned contains the information obtained from a line in
|
|
.Pa /etc/bluetooth/hosts
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn bt_sethostent
|
|
function controls whether
|
|
.Pa /etc/bluetooth/hosts
|
|
file should stay open after each call to
|
|
.Fn bt_gethostbyname
|
|
or
|
|
.Fn bt_gethostbyaddr .
|
|
If the
|
|
.Fa stayopen
|
|
flag is non-zero, the file will not be closed.
|
|
.Pp
|
|
The
|
|
.Fn bt_endhostent
|
|
function closes the
|
|
.Pa /etc/bluetooth/hosts
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn bt_getprotoent ,
|
|
.Fn bt_getprotobyname
|
|
and
|
|
.Fn bt_getprotobynumber
|
|
functions each return a pointer to an object with the
|
|
.Vt protoent
|
|
structure describing a Bluetooth Protocol Service Multiplexor referenced
|
|
by name or number, respectively.
|
|
.Pp
|
|
The
|
|
.Fa name
|
|
argument passed to
|
|
.Fn bt_getprotobyname
|
|
should point to a
|
|
.Dv NUL Ns -terminated
|
|
Bluetooth Protocol Service Multiplexor name.
|
|
The
|
|
.Fa proto
|
|
argument passed to
|
|
.Fn bt_getprotobynumber
|
|
should have numeric value of the desired Bluetooth Protocol Service Multiplexor.
|
|
.Pp
|
|
The structure returned contains the information obtained from a line in
|
|
.Pa /etc/bluetooth/protocols
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn bt_setprotoent
|
|
function controls whether
|
|
.Pa /etc/bluetooth/protocols
|
|
file should stay open after each call to
|
|
.Fn bt_getprotobyname
|
|
or
|
|
.Fn bt_getprotobynumber .
|
|
If the
|
|
.Fa stayopen
|
|
flag is non-zero, the file will not be closed.
|
|
.Pp
|
|
The
|
|
.Fn bt_endprotoent
|
|
function closes the
|
|
.Pa /etc/bluetooth/protocols
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn bt_aton
|
|
routine interprets the specified character string as a Bluetooth address,
|
|
placing the address into the structure provided.
|
|
It returns 1 if the string was successfully interpreted,
|
|
or 0 if the string is invalid.
|
|
.Pp
|
|
The routine
|
|
.Fn bt_ntoa
|
|
takes a Bluetooth address and places an
|
|
.Tn ASCII
|
|
string representing the address into the buffer provided.
|
|
It is up to the caller to ensure that provided buffer has enough space.
|
|
If no buffer was provided then internal static buffer will be used.
|
|
.Pp
|
|
The
|
|
.Fn bt_devaddr
|
|
function interprets the specified
|
|
.Fa devname
|
|
string as the address or device name of a Bluetooth device on the local system,
|
|
and places the device address in the provided
|
|
.Fa bdaddr ,
|
|
if any.
|
|
The function returns 1 if the string was successfully interpreted,
|
|
or 0 if the string did not match any local device.
|
|
The
|
|
.Fn bt_devname
|
|
function takes a Bluetooth device address and copies the local device
|
|
name associated with that address into the buffer provided,
|
|
if any.
|
|
Caller must ensure that provided buffer is at least
|
|
.Dv HCI_DEVNAME_SIZE
|
|
characters in size.
|
|
The function returns 1 when the device was found,
|
|
otherwise 0.
|
|
.Pp
|
|
The
|
|
.Fn bt_devinfo
|
|
function populates provided
|
|
.Vt bt_devinfo
|
|
structure with the information about given Bluetooth device.
|
|
The caller is expected to pass Bluetooth device name in the
|
|
.Fa devname
|
|
field of the passed
|
|
.Vt bt_devinfo
|
|
structure.
|
|
The function returns 0 when successful,
|
|
otherwise -1.
|
|
The
|
|
.Vt bt_devinfo
|
|
structure is defined as follows
|
|
.Bd -literal -offset indent
|
|
struct bt_devinfo
|
|
{
|
|
char devname[HCI_DEVNAME_SIZE];
|
|
|
|
uint32_t state;
|
|
|
|
bdaddr_t bdaddr;
|
|
uint16_t _reserved0;
|
|
|
|
uint8_t features[HCI_DEVFEATURES_SIZE];
|
|
|
|
/* buffer info */
|
|
uint16_t _reserved1;
|
|
uint16_t cmd_free;
|
|
uint16_t sco_size;
|
|
uint16_t sco_pkts;
|
|
uint16_t sco_free;
|
|
uint16_t acl_size;
|
|
uint16_t acl_pkts;
|
|
uint16_t acl_free;
|
|
|
|
/* stats */
|
|
uint32_t cmd_sent;
|
|
uint32_t evnt_recv;
|
|
uint32_t acl_recv;
|
|
uint32_t acl_sent;
|
|
uint32_t sco_recv;
|
|
uint32_t sco_sent;
|
|
uint32_t bytes_recv;
|
|
uint32_t bytes_sent;
|
|
|
|
/* misc/specific */
|
|
uint16_t link_policy_info;
|
|
uint16_t packet_type_info;
|
|
uint16_t role_switch_info;
|
|
uint16_t debug;
|
|
|
|
uint8_t _padding[20];
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Fn bt_devenum
|
|
function enumerates Bluetooth devices present in the system.
|
|
For every device found,
|
|
the function will call provided
|
|
.Fa cb
|
|
callback function which should be of
|
|
.Vt bt_devenum_cb_t
|
|
type.
|
|
The callback function is passed a
|
|
.Dv HCI
|
|
socket
|
|
.Fa s ,
|
|
fully populated
|
|
.Vt bt_devinfo
|
|
structure
|
|
.Fa di
|
|
and
|
|
.Fa arg
|
|
argument provided to the
|
|
.Fn bt_devenum .
|
|
The callback function can stop enumeration by returning a value
|
|
that is greater than zero.
|
|
The function returns number of successfully enumerated devices,
|
|
or -1 if an error occurred.
|
|
.Pp
|
|
The
|
|
.Fn bt_devopen
|
|
function opens a Bluetooth device with the given
|
|
.Fa devname
|
|
and returns a connected and bound
|
|
.Dv HCI
|
|
socket handle.
|
|
The function returns -1 if an error has occurred.
|
|
.Pp
|
|
The
|
|
.Fn bt_devclose
|
|
closes the passed
|
|
.Dv HCI
|
|
socket handle
|
|
.Fa s ,
|
|
previously obtained with
|
|
.Xr bt_devopen 3 .
|
|
.Pp
|
|
The
|
|
.Fn bt_devsend
|
|
function sends a Bluetooth
|
|
.Dv HCI
|
|
command with the given
|
|
.Fa opcode
|
|
to the provided socket
|
|
.Fa s ,
|
|
previously obtained with
|
|
.Xr bt_devopen 3 .
|
|
The
|
|
.Fa opcode
|
|
parameter is expected to be in the host byte order.
|
|
The
|
|
.Fa param
|
|
and
|
|
.Fa plen
|
|
parameters specify command parameters.
|
|
The
|
|
.Fn bt_devsend
|
|
function does not modify the
|
|
.Dv HCI
|
|
filter on the provided socket
|
|
.Fa s .
|
|
The function returns 0 on success,
|
|
or -1 if an error occurred.
|
|
.Pp
|
|
The
|
|
.Fn bt_devrecv
|
|
function receives one Bluetooth
|
|
.Dv HCI
|
|
packet from the socket
|
|
.Fa s ,
|
|
previously obtained with
|
|
.Xr bt_devopen 3 .
|
|
The packet is placed into the provided buffer
|
|
.Fa buf
|
|
of size
|
|
.Fa size .
|
|
The
|
|
.Fa to
|
|
parameter specifies receive timeout in seconds.
|
|
Infinite timeout can be specified by passing negative value in the
|
|
.Fa to
|
|
parameter.
|
|
The
|
|
.Fn bt_devrecv
|
|
function does not modify the
|
|
.Dv HCI
|
|
filter on the provided socket
|
|
.Fa s .
|
|
The function returns total number of bytes received,
|
|
or -1 if an error occurred.
|
|
.Pp
|
|
The
|
|
.Fn bt_devreq
|
|
function makes a Bluetooth
|
|
.Dv HCI
|
|
request to the socket
|
|
.Fa s ,
|
|
previously obtained with
|
|
.Xr bt_devopen 3 .
|
|
The function will send the specified command and will wait for the specified
|
|
event,
|
|
or timeout
|
|
.Fa to
|
|
seconds to occur.
|
|
The
|
|
.Vt bt_devreq
|
|
structure is defined as follows
|
|
.Bd -literal -offset indent
|
|
struct bt_devreq
|
|
{
|
|
uint16_t opcode;
|
|
uint8_t event;
|
|
void *cparam;
|
|
size_t clen;
|
|
void *rparam;
|
|
size_t rlen;
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Fa opcode
|
|
field specifies the command and is expected to be in the host byte order.
|
|
The
|
|
.Fa cparam
|
|
and
|
|
.Fa clen
|
|
fields specify command parameters data and command parameters data size
|
|
respectively.
|
|
The
|
|
.Fa event
|
|
field specifies which Bluetooth
|
|
.Dv HCI
|
|
event ID the function should wait for, otherwise it should be set to zero.
|
|
The
|
|
.Dv HCI
|
|
Command Complete and Command Status events are enabled by default.
|
|
The
|
|
.Fa rparam
|
|
and
|
|
.Fa rlen
|
|
parameters specify buffer and buffer size respectively where return
|
|
parameters should be placed.
|
|
The
|
|
.Fn bt_devreq
|
|
function temporarily modifies filter on the provided
|
|
.Dv HCI
|
|
socket
|
|
.Fa s .
|
|
The function returns 0 on success, or -1 if an error occurred.
|
|
.Pp
|
|
The
|
|
.Fn bt_devfilter
|
|
controls the local
|
|
.Dv HCI
|
|
filter associated with the socket
|
|
.Fa s ,
|
|
previously obtained with
|
|
.Xr bt_devopen 3 .
|
|
Filtering can be done on packet types, i.e.
|
|
.Dv ACL ,
|
|
.Dv SCO
|
|
or
|
|
.Dv HCI ,
|
|
command and event packets, and, in addition, on
|
|
.Dv HCI
|
|
event IDs.
|
|
Before applying the
|
|
.Fa new
|
|
filter (if provided) the function will try to obtain the current filter
|
|
from the socket
|
|
.Fa s
|
|
and place it into the
|
|
.Fa old
|
|
parameter (if provided).
|
|
The function returns 0 on success, or -1 if an error occurred.
|
|
.Pp
|
|
The
|
|
.Fn bt_devfilter_pkt_set ,
|
|
.Fn bt_devfilter_pkt_clr
|
|
and
|
|
.Fn bt_devfilter_pkt_tst
|
|
functions can be used to modify and test the
|
|
.Dv HCI
|
|
filter
|
|
.Fa filter .
|
|
The
|
|
.Fa type
|
|
parameter specifies
|
|
.Dv HCI
|
|
packet type.
|
|
.Pp
|
|
The
|
|
.Fn bt_devfilter_evt_set ,
|
|
.Fn bt_devfilter_evt_clr
|
|
and
|
|
.Fn bt_devfilter_evt_tst
|
|
functions can be used to modify and test the
|
|
.Dv HCI
|
|
event filter
|
|
.Fa filter .
|
|
The
|
|
.Fa event
|
|
parameter specifies
|
|
.Dv HCI
|
|
event ID.
|
|
.Pp
|
|
The
|
|
.Fn bt_devinquiry
|
|
function performs Bluetooth inquiry.
|
|
The
|
|
.Fa devname
|
|
parameter specifies which local Bluetooth device should perform an inquiry.
|
|
If not specified, i.e.
|
|
.Dv NULL ,
|
|
then first available device will be used.
|
|
The
|
|
.Fa length
|
|
parameters specifies the total length of an inquiry in seconds.
|
|
If not specified, i.e. 0, default value will be used.
|
|
The
|
|
.Fa num_rsp
|
|
parameter specifies the number of responses that can be received before
|
|
the inquiry is halted.
|
|
If not specified, i.e. 0, default value will be used.
|
|
The
|
|
.Fa ii
|
|
parameter specifies where to place inquiry results.
|
|
On success, the function will return total number of inquiry results,
|
|
will allocate,
|
|
using
|
|
.Xr calloc 3 ,
|
|
buffer to store all the inquiry results and
|
|
will return pointer to the allocated buffer in the
|
|
.Fa ii
|
|
parameter.
|
|
It is up to the caller of the function to dispose of the buffer using
|
|
.Xr free 3
|
|
call.
|
|
The function returns -1 if an error has occurred.
|
|
The
|
|
.Vt bt_devinquiry
|
|
structure is defined as follows
|
|
.Bd -literal -offset indent
|
|
struct bt_devinquiry {
|
|
bdaddr_t bdaddr;
|
|
uint8_t pscan_rep_mode;
|
|
uint8_t pscan_period_mode;
|
|
uint8_t dev_class[3];
|
|
uint16_t clock_offset;
|
|
int8_t rssi;
|
|
uint8_t data[240];
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Fn bdaddr_same ,
|
|
.Fn bdaddr_any
|
|
and
|
|
.Fn bdaddr_copy
|
|
are handy shorthand Bluetooth address utility functions.
|
|
The
|
|
.Fn bdaddr_same
|
|
function will test if two provided BD_ADDRs are the same.
|
|
The
|
|
.Fn bdaddr_any
|
|
function will test if provided BD_ADDR is
|
|
.Dv ANY
|
|
BD_ADDR.
|
|
The
|
|
.Fn bdaddr_copy
|
|
function will copy provided
|
|
.Fa src
|
|
BD_ADDR into provided
|
|
.Fa dst
|
|
BD_ADDR.
|
|
.Sh FILES
|
|
.Bl -tag -width ".Pa /etc/bluetooth/hosts" -compact
|
|
.It Pa /etc/bluetooth/hosts
|
|
.It Pa /etc/bluetooth/protocols
|
|
.El
|
|
.Sh EXAMPLES
|
|
Print out the hostname associated with a specific BD_ADDR:
|
|
.Bd -literal -offset indent
|
|
const char *bdstr = "00:01:02:03:04:05";
|
|
bdaddr_t bd;
|
|
struct hostent *hp;
|
|
|
|
if (!bt_aton(bdstr, &bd))
|
|
errx(1, "can't parse BD_ADDR %s", bdstr);
|
|
|
|
if ((hp = bt_gethostbyaddr((const char *)&bd,
|
|
sizeof(bd), AF_BLUETOOTH)) == NULL)
|
|
errx(1, "no name associated with %s", bdstr);
|
|
|
|
printf("name associated with %s is %s\en", bdstr, hp->h_name);
|
|
.Ed
|
|
.Sh DIAGNOSTICS
|
|
Error return status from
|
|
.Fn bt_gethostent ,
|
|
.Fn bt_gethostbyname
|
|
and
|
|
.Fn bt_gethostbyaddr
|
|
is indicated by return of a
|
|
.Dv NULL
|
|
pointer.
|
|
The external integer
|
|
.Va h_errno
|
|
may then be checked to see whether this is a temporary failure
|
|
or an invalid or unknown host.
|
|
The routine
|
|
.Xr herror 3
|
|
can be used to print an error message describing the failure.
|
|
If its argument
|
|
.Fa string
|
|
is
|
|
.Pf non- Dv NULL ,
|
|
it is printed, followed by a colon and a space.
|
|
The error message is printed with a trailing newline.
|
|
.Pp
|
|
The variable
|
|
.Va h_errno
|
|
can have the following values:
|
|
.Bl -tag -width ".Dv HOST_NOT_FOUND"
|
|
.It Dv HOST_NOT_FOUND
|
|
No such host is known.
|
|
.It Dv NO_RECOVERY
|
|
Some unexpected server failure was encountered.
|
|
This is a non-recoverable error.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Fn bt_getprotoent ,
|
|
.Fn bt_getprotobyname
|
|
and
|
|
.Fn bt_getprotobynumber
|
|
return
|
|
.Dv NULL
|
|
on EOF or error.
|
|
.Sh SEE ALSO
|
|
.Xr gethostbyaddr 3 ,
|
|
.Xr gethostbyname 3 ,
|
|
.Xr getprotobyname 3 ,
|
|
.Xr getprotobynumber 3 ,
|
|
.Xr herror 3 ,
|
|
.Xr inet_aton 3 ,
|
|
.Xr inet_ntoa 3 ,
|
|
.Xr ng_hci 4
|
|
.Sh CAVEAT
|
|
The
|
|
.Fn bt_gethostent
|
|
function reads the next line of
|
|
.Pa /etc/bluetooth/hosts ,
|
|
opening the file if necessary.
|
|
.Pp
|
|
The
|
|
.Fn bt_sethostent
|
|
function opens and/or rewinds the
|
|
.Pa /etc/bluetooth/hosts
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn bt_getprotoent
|
|
function reads the next line of
|
|
.Pa /etc/bluetooth/protocols ,
|
|
opening the file if necessary.
|
|
.Pp
|
|
The
|
|
.Fn bt_setprotoent
|
|
function opens and/or rewinds the
|
|
.Pa /etc/bluetooth/protocols
|
|
file.
|
|
.Pp
|
|
The
|
|
.Fn bt_devenum
|
|
function enumerates up to
|
|
.Dv HCI_DEVMAX
|
|
Bluetooth devices.
|
|
During enumeration the
|
|
.Fn bt_devenum
|
|
function uses the same
|
|
.Dv HCI
|
|
socket.
|
|
The function guarantees that the socket,
|
|
passed to the callback function,
|
|
will be bound and connected to the Bluetooth device being enumerated.
|
|
.Sh AUTHORS
|
|
.An Maksim Yevmenkin Aq Mt m_evmenkin@yahoo.com
|
|
.Sh BUGS
|
|
Some of those functions use static data storage;
|
|
if the data is needed for future use, it should be
|
|
copied before any subsequent calls overwrite it.
|