BLUETOOTH(3) | Library Functions Manual | BLUETOOTH(3) |
bt_gethostbyname
,
bt_gethostbyaddr
,
bt_gethostent
, bt_sethostent
,
bt_endhostent
,
bt_getprotobyname
,
bt_getprotobynumber
,
bt_getprotoent
,
bt_setprotoent
,
bt_endprotoent
, bt_aton
,
bt_ntoa
—
#include <bluetooth.h>
struct hostent *
bt_gethostbyname
(const
char *name);
struct hostent *
bt_gethostbyaddr
(const
char *addr, int
len, int type);
struct hostent *
bt_gethostent
(void);
void
bt_sethostent
(int
stayopen);
void
bt_endhostent
(void);
struct protoent *
bt_getprotobyname
(const
char *name);
struct protoent *
bt_getprotobynumber
(int
proto);
struct protoent *
bt_getprotoent
(void);
void
bt_setprotoent
(int
stayopen);
void
bt_endprotoent
(void);
int
bt_aton
(const
char *str, bdaddr_t
*ba);
const char *
bt_ntoa
(const
bdaddr_t *ba, char
*str);
bt_gethostent
(),
bt_gethostbyname
(), and
bt_gethostbyaddr
() functions each return a pointer to
an object with the hostent structure describing a
Bluetooth host referenced by name or by address, respectively.
The name argument passed to
bt_gethostbyname
() should point to a
NUL
-terminated hostname. The
addr argument passed to
bt_gethostbyaddr
() should point to an address which
is len bytes long, in binary form (i.e., not a
Bluetooth BD_ADDR in human readable ASCII form). The
type argument specifies the address family of this
address and must be set to AF_BLUETOOTH
.
The structure returned contains the information obtained from a line in /etc/bluetooth/hosts file.
The bt_sethostent
() function controls
whether /etc/bluetooth/hosts file should stay open
after each call to bt_gethostbyname
() or
bt_gethostbyaddr
(). If the
stayopen flag is non-zero, the file will not be
closed.
The bt_endhostent
() function closes the
/etc/bluetooth/hosts file.
The bt_getprotoent
(),
bt_getprotobyname
(), and
bt_getprotobynumber
() functions each return a
pointer to an object with the protoent structure
describing a Bluetooth Protocol Service Multiplexer referenced by name or
number, respectively.
The name argument passed to
bt_getprotobyname
() should point to a
NUL
-terminated Bluetooth Protocol Service
Multiplexer name. The proto argument passed to
bt_getprotobynumber
() should have numeric value of
the desired Bluetooth Protocol Service Multiplexer.
The structure returned contains the information obtained from a line in /etc/bluetooth/protocols file.
The bt_setprotoent
() function controls
whether /etc/bluetooth/protocols file should stay
open after each call to bt_getprotobyname
() or
bt_getprotobynumber
(). If the
stayopen flag is non-zero, the file will not be
closed.
The bt_endprotoent
() function closes the
/etc/bluetooth/protocols file.
The 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.
The routine bt_ntoa
() takes a Bluetooth
address and places an 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 an internal static buffer will be
used.
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\n", bdstr, hp->h_name);
bt_gethostent
(),
bt_gethostbyname
(), and
bt_gethostbyaddr
() is indicated by return of a
NULL
pointer. The external integer
h_errno may then be checked to see whether this is a
temporary failure or an invalid or unknown host. The routine
herror(3) can be used to print
an error message describing the failure. If its argument
string is non-NULL
, it is
printed, followed by a colon and a space. The error message is printed with a
trailing newline.
The variable h_errno can have the following values:
HOST_NOT_FOUND
NO_RECOVERY
The bt_getprotoent
(),
bt_getprotobyname
(), and
bt_getprotobynumber
() return
NULL
on EOF or error.
libbluetooth
first appeared in
FreeBSD was ported to NetBSD
4.0 and extended by Iain Hibbert for Itronix,
Inc.
bt_gethostent
() function reads the next line of
/etc/bluetooth/hosts, opening the file if necessary.
The bt_sethostent
() function opens and/or
rewinds the /etc/bluetooth/hosts file.
The bt_getprotoent
() function reads the
next line of /etc/bluetooth/protocols, opening the
file if necessary.
The bt_setprotoent
() function opens and/or
rewinds the /etc/bluetooth/protocols file.
October 25, 2011 | NetBSD 9.2 |