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Add Bluetooth compatibility shims. Inspired by Linux BlueZ and NetBSD.

Browse Source 
Discussed with:	Iain Hibbert plunky -at- rya-online -dot- net of NetBSD
MFC after:	1 month
This commit is contained in:
Maksim Yevmenkin 2009-03-06 23:30:07 +00:00
parent 42ca1e2bb5
commit baeef61449
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=189462
6 changed files with 548 additions and 8 deletions
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8
lib/libbluetooth/Makefile
View File

@ -9,7 +9,7 @@ CFLAGS+= -I${.CURDIR} -I${.CURDIR}/../../sys
SHLIB_MAJOR= 3
SRCS= bluetooth.c
SRCS= bluetooth.c dev.c hci.c
INCS= bluetooth.h
MLINKS+= bluetooth.3 bt_gethostbyname.3
@ -27,6 +27,12 @@ MLINKS+= bluetooth.3 bt_endprotoent.3
MLINKS+= bluetooth.3 bt_ntoa.3
MLINKS+= bluetooth.3 bt_aton.3
MLINKS+= bluetooth.3 bt_devaddr.3
MLINKS+= bluetooth.3 bt_devname.3
MLINKS+= bluetooth.3 bt_devinfo.3
MLINKS+= bluetooth.3 bt_devenum.3
MLINKS+= bluetooth.3 bdaddr_same.3
MLINKS+= bluetooth.3 bdaddr_any.3
MLINKS+= bluetooth.3 bdaddr_copy.3

135
lib/libbluetooth/bluetooth.3
View File

@ -1,4 +1,4 @@
.\" Copyright (c) 2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
.\" Copyright (c) 2003-2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
@ -25,7 +25,7 @@
.\" $Id: bluetooth.3,v 1.5 2003/05/20 23:04:30 max Exp $
.\" $FreeBSD$
.\"
.Dd August 13, 2008
.Dd February 13, 2009
.Dt BLUETOOTH 3
.Os
.Sh NAME
@ -74,6 +74,16 @@
.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 bdaddr_same "const bdaddr_t *a" "const bdaddr_t *b"
.Ft int
.Fn bdaddr_any "const bdaddr_t *a"
@ -197,6 +207,110 @@ 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 prodivded
.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 bdaddr_same ,
.Fn bdaddr_any
and
@ -287,7 +401,8 @@ on EOF or error.
.Xr getprotobynumber 3 ,
.Xr herror 3 ,
.Xr inet_aton 3 ,
.Xr inet_ntoa 3
.Xr inet_ntoa 3 ,
.Xr ng_hci 4
.Sh CAVEAT
The
.Fn bt_gethostent
@ -312,6 +427,20 @@ The
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 m_evmenkin@yahoo.com
.Sh BUGS

6
lib/libbluetooth/bluetooth.c
View File

@ -1,7 +1,9 @@
/*
* bluetooth.c
*
* Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
*/
/*-
* Copyright (c) 2001-2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without

66
lib/libbluetooth/bluetooth.h
View File

@ -1,7 +1,9 @@
/*
* bluetooth.h
*
* Copyright (c) 2001-2003 Maksim Yevmenkin <m_evmenkin@yahoo.com>
*/
/*-
* Copyright (c) 2001-2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -35,9 +37,12 @@
#include <sys/types.h>
#include <sys/bitstring.h>
#include <sys/endian.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
#include <netdb.h>
#include <netgraph/ng_message.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/include/ng_btsocket.h>
@ -72,6 +77,63 @@ void bt_endprotoent (void);
char const * bt_ntoa (bdaddr_t const *ba, char *str);
int bt_aton (char const *str, bdaddr_t *ba);
/* bt_devXXXX() functions (inspired by NetBSD) */
int bt_devaddr (char const *devname, bdaddr_t *addr);
int bt_devname (char *devname, bdaddr_t const *addr);
/*
* Bluetooth HCI functions
*/
#define HCI_DEVMAX 32 /* arbitrary */
#define HCI_DEVNAME_SIZE NG_NODESIZ
#define HCI_DEVFEATURES_SIZE NG_HCI_FEATURES_SIZE
struct bt_devinfo
{
char devname[HCI_DEVNAME_SIZE];
uint32_t state; /* device/implementation specific */
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]; /* leave space for future additions */
};
typedef int (bt_devenum_cb_t)(int, struct bt_devinfo const *, void *);
int bt_devinfo (struct bt_devinfo *di);
int bt_devenum (bt_devenum_cb_t *cb, void *arg);
/*
* bdaddr utility functions (from NetBSD)
*/

95
lib/libbluetooth/dev.c Normal file
View File

@ -0,0 +1,95 @@
/*
* dev.c
*/
/*-
* Copyright (c) 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.
*
* $FreeBSD$
*/
#include <bluetooth.h>
#include <stdio.h>
#include <string.h>
struct bt_devaddr_match_arg
{
char devname[HCI_DEVNAME_SIZE];
bdaddr_t const *bdaddr;
};
static bt_devenum_cb_t bt_devaddr_match;
int
bt_devaddr(char const *devname, bdaddr_t *addr)
{
struct bt_devinfo di;
strlcpy(di.devname, devname, sizeof(di.devname));
if (bt_devinfo(&di) < 0)
return (0);
if (addr != NULL)
bdaddr_copy(addr, &di.bdaddr);
return (1);
}
int
bt_devname(char *devname, bdaddr_t const *addr)
{
struct bt_devaddr_match_arg arg;
memset(&arg, 0, sizeof(arg));
arg.bdaddr = addr;
if (bt_devenum(&bt_devaddr_match, &arg) < 0)
return (0);
if (arg.devname[0] == '\0') {
errno = ENXIO;
return (0);
}
if (devname != NULL)
strlcpy(devname, arg.devname, HCI_DEVNAME_SIZE);
return (1);
}
static int
bt_devaddr_match(int s, struct bt_devinfo const *di, void *arg)
{
struct bt_devaddr_match_arg *m = (struct bt_devaddr_match_arg *)arg;
if (!bdaddr_same(&di->bdaddr, m->bdaddr))
return (0);
strlcpy(m->devname, di->devname, sizeof(m->devname));
return (1);
}

246
lib/libbluetooth/hci.c Normal file
View File

@ -0,0 +1,246 @@
/*
* hci.c
*/
/*-
* Copyright (c) 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.
*
* $FreeBSD$
*/
#include <bluetooth.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static char * bt_dev2node (char const *devname, char *nodename, int nnlen);
int
bt_devinfo(struct bt_devinfo *di)
{
union {
struct ng_btsocket_hci_raw_node_state r0;
struct ng_btsocket_hci_raw_node_bdaddr r1;
struct ng_btsocket_hci_raw_node_features r2;
struct ng_btsocket_hci_raw_node_buffer r3;
struct ng_btsocket_hci_raw_node_stat r4;
struct ng_btsocket_hci_raw_node_link_policy_mask r5;
struct ng_btsocket_hci_raw_node_packet_mask r6;
struct ng_btsocket_hci_raw_node_role_switch r7;
struct ng_btsocket_hci_raw_node_debug r8;
} rp;
struct sockaddr_hci ha;
int s, rval;
if (di == NULL) {
errno = EINVAL;
return (-1);
}
memset(&ha, 0, sizeof(ha));
ha.hci_len = sizeof(ha);
ha.hci_family = AF_BLUETOOTH;
if (bt_aton(di->devname, &rp.r1.bdaddr)) {
if (!bt_devname(ha.hci_node, &rp.r1.bdaddr))
return (-1);
} else if (bt_dev2node(di->devname, ha.hci_node,
sizeof(ha.hci_node)) == NULL) {
errno = ENXIO;
return (-1);
}
s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
if (s < 0)
return (-1);
rval = -1;
if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0)
goto bad;
strlcpy(di->devname, ha.hci_node, sizeof(di->devname));
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_STATE, &rp.r0, sizeof(rp.r0)) < 0)
goto bad;
di->state = rp.r0.state;
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_BDADDR, &rp.r1, sizeof(rp.r1)) < 0)
goto bad;
bdaddr_copy(&di->bdaddr, &rp.r1.bdaddr);
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_FEATURES, &rp.r2, sizeof(rp.r2)) < 0)
goto bad;
memcpy(di->features, rp.r2.features, sizeof(di->features));
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_BUFFER, &rp.r3, sizeof(rp.r3)) < 0)
goto bad;
di->cmd_free = rp.r3.buffer.cmd_free;
di->sco_size = rp.r3.buffer.sco_size;
di->sco_pkts = rp.r3.buffer.sco_pkts;
di->sco_free = rp.r3.buffer.sco_free;
di->acl_size = rp.r3.buffer.acl_size;
di->acl_pkts = rp.r3.buffer.acl_pkts;
di->acl_free = rp.r3.buffer.acl_free;
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_STAT, &rp.r4, sizeof(rp.r4)) < 0)
goto bad;
di->cmd_sent = rp.r4.stat.cmd_sent;
di->evnt_recv = rp.r4.stat.evnt_recv;
di->acl_recv = rp.r4.stat.acl_recv;
di->acl_sent = rp.r4.stat.acl_sent;
di->sco_recv = rp.r4.stat.sco_recv;
di->sco_sent = rp.r4.stat.sco_sent;
di->bytes_recv = rp.r4.stat.bytes_recv;
di->bytes_sent = rp.r4.stat.bytes_sent;
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_LINK_POLICY_MASK,
&rp.r5, sizeof(rp.r5)) < 0)
goto bad;
di->link_policy_info = rp.r5.policy_mask;
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_PACKET_MASK,
&rp.r6, sizeof(rp.r6)) < 0)
goto bad;
di->packet_type_info = rp.r6.packet_mask;
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_ROLE_SWITCH,
&rp.r7, sizeof(rp.r7)) < 0)
goto bad;
di->role_switch_info = rp.r7.role_switch;
if (ioctl(s, SIOC_HCI_RAW_NODE_GET_DEBUG, &rp.r8, sizeof(rp.r8)) < 0)
goto bad;
di->debug = rp.r8.debug;
rval = 0;
bad:
close(s);
return (rval);
}
int
bt_devenum(bt_devenum_cb_t cb, void *arg)
{
struct ng_btsocket_hci_raw_node_list_names rp;
struct bt_devinfo di;
struct sockaddr_hci ha;
int s, i, count;
rp.num_names = HCI_DEVMAX;
rp.names = (struct nodeinfo *) calloc(rp.num_names,
sizeof(struct nodeinfo));
if (rp.names == NULL) {
errno = ENOMEM;
return (-1);
}
memset(&ha, 0, sizeof(ha));
ha.hci_len = sizeof(ha);
ha.hci_family = AF_BLUETOOTH;
ha.hci_node[0] = 'x';
s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
if (s < 0) {
free(rp.names);
return (-1);
}
if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
ioctl(s, SIOC_HCI_RAW_NODE_LIST_NAMES, &rp, sizeof(rp)) < 0) {
close(s);
free(rp.names);
return (-1);
}
for (count = 0, i = 0; i < rp.num_names; i ++) {
strlcpy(di.devname, rp.names[i].name, sizeof(di.devname));
if (bt_devinfo(&di) < 0)
continue;
count ++;
if (cb == NULL)
continue;
strlcpy(ha.hci_node, rp.names[i].name, sizeof(ha.hci_node));
if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0)
continue;
if ((*cb)(s, &di, arg) > 0)
break;
}
close (s);
free(rp.names);
return (count);
}
static char *
bt_dev2node(char const *devname, char *nodename, int nnlen)
{
static char const * bt_dev_prefix[] = {
"btccc", /* 3Com Bluetooth PC-CARD */
"h4", /* UART/serial Bluetooth devices */
"ubt", /* Bluetooth USB devices */
NULL /* should be last */
};
static char _nodename[HCI_DEVNAME_SIZE];
char const **p;
char *ep;
int plen, unit;
if (nodename == NULL) {
nodename = _nodename;
nnlen = HCI_DEVNAME_SIZE;
}
for (p = bt_dev_prefix; *p != NULL; p ++) {
plen = strlen(*p);
if (strncmp(devname, *p, plen) != 0)
continue;
unit = strtoul(devname + plen, &ep, 10);
if (*ep != '\0' &&
strcmp(ep, "hci") != 0 &&
strcmp(ep, "l2cap") != 0)
return (NULL); /* can't make sense of device name */
snprintf(nodename, nnlen, "%s%uhci", *p, unit);
return (nodename);
}
return (NULL);
}