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ng_btsocket_hci_raw.c
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ng_btsocket_hci_raw.c
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/*
* ng_btsocket_hci_raw.c
*/
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2001-2002 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: ng_btsocket_hci_raw.c,v 1.14 2003/09/14 23:29:06 max Exp $
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bitstring.h>
#include <sys/domain.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/filedesc.h>
#include <sys/ioccom.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <net/vnet.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/bluetooth/include/ng_bluetooth.h>
#include <netgraph/bluetooth/include/ng_hci.h>
#include <netgraph/bluetooth/include/ng_l2cap.h>
#include <netgraph/bluetooth/include/ng_btsocket.h>
#include <netgraph/bluetooth/include/ng_btsocket_hci_raw.h>
/* MALLOC define */
#ifdef NG_SEPARATE_MALLOC
static MALLOC_DEFINE(M_NETGRAPH_BTSOCKET_HCI_RAW, "netgraph_btsocks_hci_raw",
"Netgraph Bluetooth raw HCI sockets");
#else
#define M_NETGRAPH_BTSOCKET_HCI_RAW M_NETGRAPH
#endif /* NG_SEPARATE_MALLOC */
/* Netgraph node methods */
static ng_constructor_t ng_btsocket_hci_raw_node_constructor;
static ng_rcvmsg_t ng_btsocket_hci_raw_node_rcvmsg;
static ng_shutdown_t ng_btsocket_hci_raw_node_shutdown;
static ng_newhook_t ng_btsocket_hci_raw_node_newhook;
static ng_connect_t ng_btsocket_hci_raw_node_connect;
static ng_rcvdata_t ng_btsocket_hci_raw_node_rcvdata;
static ng_disconnect_t ng_btsocket_hci_raw_node_disconnect;
static void ng_btsocket_hci_raw_input (void *, int);
static void ng_btsocket_hci_raw_output(node_p, hook_p, void *, int);
static void ng_btsocket_hci_raw_savctl(ng_btsocket_hci_raw_pcb_p,
struct mbuf **,
struct mbuf *);
static int ng_btsocket_hci_raw_filter(ng_btsocket_hci_raw_pcb_p,
struct mbuf *, int);
#define ng_btsocket_hci_raw_wakeup_input_task() \
taskqueue_enqueue(taskqueue_swi, &ng_btsocket_hci_raw_task)
/* Security filter */
struct ng_btsocket_hci_raw_sec_filter {
bitstr_t bit_decl(events, 0xff);
bitstr_t bit_decl(commands[0x3f], 0x3ff);
};
/* Netgraph type descriptor */
static struct ng_type typestruct = {
.version = NG_ABI_VERSION,
.name = NG_BTSOCKET_HCI_RAW_NODE_TYPE,
.constructor = ng_btsocket_hci_raw_node_constructor,
.rcvmsg = ng_btsocket_hci_raw_node_rcvmsg,
.shutdown = ng_btsocket_hci_raw_node_shutdown,
.newhook = ng_btsocket_hci_raw_node_newhook,
.connect = ng_btsocket_hci_raw_node_connect,
.rcvdata = ng_btsocket_hci_raw_node_rcvdata,
.disconnect = ng_btsocket_hci_raw_node_disconnect,
};
/* Globals */
static u_int32_t ng_btsocket_hci_raw_debug_level;
static u_int32_t ng_btsocket_hci_raw_ioctl_timeout;
static node_p ng_btsocket_hci_raw_node;
static struct ng_bt_itemq ng_btsocket_hci_raw_queue;
static struct mtx ng_btsocket_hci_raw_queue_mtx;
static struct task ng_btsocket_hci_raw_task;
static LIST_HEAD(, ng_btsocket_hci_raw_pcb) ng_btsocket_hci_raw_sockets;
static struct mtx ng_btsocket_hci_raw_sockets_mtx;
static u_int32_t ng_btsocket_hci_raw_token;
static struct mtx ng_btsocket_hci_raw_token_mtx;
static struct ng_btsocket_hci_raw_sec_filter *ng_btsocket_hci_raw_sec_filter;
static struct timeval ng_btsocket_hci_raw_lasttime;
static int ng_btsocket_hci_raw_curpps;
/* Sysctl tree */
SYSCTL_DECL(_net_bluetooth_hci_sockets);
static SYSCTL_NODE(_net_bluetooth_hci_sockets, OID_AUTO, raw,
CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"Bluetooth raw HCI sockets family");
SYSCTL_UINT(_net_bluetooth_hci_sockets_raw, OID_AUTO, debug_level, CTLFLAG_RW,
&ng_btsocket_hci_raw_debug_level, NG_BTSOCKET_WARN_LEVEL,
"Bluetooth raw HCI sockets debug level");
SYSCTL_UINT(_net_bluetooth_hci_sockets_raw, OID_AUTO, ioctl_timeout, CTLFLAG_RW,
&ng_btsocket_hci_raw_ioctl_timeout, 5,
"Bluetooth raw HCI sockets ioctl timeout");
SYSCTL_UINT(_net_bluetooth_hci_sockets_raw, OID_AUTO, queue_len, CTLFLAG_RD,
&ng_btsocket_hci_raw_queue.len, 0,
"Bluetooth raw HCI sockets input queue length");
SYSCTL_UINT(_net_bluetooth_hci_sockets_raw, OID_AUTO, queue_maxlen, CTLFLAG_RD,
&ng_btsocket_hci_raw_queue.maxlen, 0,
"Bluetooth raw HCI sockets input queue max. length");
SYSCTL_UINT(_net_bluetooth_hci_sockets_raw, OID_AUTO, queue_drops, CTLFLAG_RD,
&ng_btsocket_hci_raw_queue.drops, 0,
"Bluetooth raw HCI sockets input queue drops");
/* Debug */
#define NG_BTSOCKET_HCI_RAW_INFO \
if (ng_btsocket_hci_raw_debug_level >= NG_BTSOCKET_INFO_LEVEL && \
ppsratecheck(&ng_btsocket_hci_raw_lasttime, &ng_btsocket_hci_raw_curpps, 1)) \
printf
#define NG_BTSOCKET_HCI_RAW_WARN \
if (ng_btsocket_hci_raw_debug_level >= NG_BTSOCKET_WARN_LEVEL && \
ppsratecheck(&ng_btsocket_hci_raw_lasttime, &ng_btsocket_hci_raw_curpps, 1)) \
printf
#define NG_BTSOCKET_HCI_RAW_ERR \
if (ng_btsocket_hci_raw_debug_level >= NG_BTSOCKET_ERR_LEVEL && \
ppsratecheck(&ng_btsocket_hci_raw_lasttime, &ng_btsocket_hci_raw_curpps, 1)) \
printf
#define NG_BTSOCKET_HCI_RAW_ALERT \
if (ng_btsocket_hci_raw_debug_level >= NG_BTSOCKET_ALERT_LEVEL && \
ppsratecheck(&ng_btsocket_hci_raw_lasttime, &ng_btsocket_hci_raw_curpps, 1)) \
printf
/****************************************************************************
****************************************************************************
** Netgraph specific
****************************************************************************
****************************************************************************/
/*
* Netgraph node constructor. Do not allow to create node of this type.
*/
static int
ng_btsocket_hci_raw_node_constructor(node_p node)
{
return (EINVAL);
} /* ng_btsocket_hci_raw_node_constructor */
/*
* Netgraph node destructor. Just let old node go and create new fresh one.
*/
static int
ng_btsocket_hci_raw_node_shutdown(node_p node)
{
int error = 0;
NG_NODE_UNREF(node);
error = ng_make_node_common(&typestruct, &ng_btsocket_hci_raw_node);
if (error != 0) {
NG_BTSOCKET_HCI_RAW_ALERT(
"%s: Could not create Netgraph node, error=%d\n", __func__, error);
ng_btsocket_hci_raw_node = NULL;
return (ENOMEM);
}
error = ng_name_node(ng_btsocket_hci_raw_node,
NG_BTSOCKET_HCI_RAW_NODE_TYPE);
if (error != 0) {
NG_BTSOCKET_HCI_RAW_ALERT(
"%s: Could not name Netgraph node, error=%d\n", __func__, error);
NG_NODE_UNREF(ng_btsocket_hci_raw_node);
ng_btsocket_hci_raw_node = NULL;
return (EINVAL);
}
return (0);
} /* ng_btsocket_hci_raw_node_shutdown */
/*
* Create new hook. Just say "yes"
*/
static int
ng_btsocket_hci_raw_node_newhook(node_p node, hook_p hook, char const *name)
{
return (0);
} /* ng_btsocket_hci_raw_node_newhook */
/*
* Connect hook. Just say "yes"
*/
static int
ng_btsocket_hci_raw_node_connect(hook_p hook)
{
return (0);
} /* ng_btsocket_hci_raw_node_connect */
/*
* Disconnect hook
*/
static int
ng_btsocket_hci_raw_node_disconnect(hook_p hook)
{
return (0);
} /* ng_btsocket_hci_raw_node_disconnect */
/*
* Receive control message.
* Make sure it is a message from HCI node and it is a response.
* Enqueue item and schedule input task.
*/
static int
ng_btsocket_hci_raw_node_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
struct ng_mesg *msg = NGI_MSG(item); /* item still has message */
int error = 0;
/*
* Check for empty sockets list creates LOR when both sender and
* receiver device are connected to the same host, so remove it
* for now
*/
if (msg != NULL &&
(msg->header.typecookie == NGM_HCI_COOKIE ||
msg->header.typecookie == NGM_GENERIC_COOKIE) &&
msg->header.flags & NGF_RESP) {
if (msg->header.token == 0) {
NG_FREE_ITEM(item);
return (0);
}
mtx_lock(&ng_btsocket_hci_raw_queue_mtx);
if (NG_BT_ITEMQ_FULL(&ng_btsocket_hci_raw_queue)) {
NG_BTSOCKET_HCI_RAW_ERR(
"%s: Input queue is full\n", __func__);
NG_BT_ITEMQ_DROP(&ng_btsocket_hci_raw_queue);
NG_FREE_ITEM(item);
error = ENOBUFS;
} else {
NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_hci_raw_queue, item);
error = ng_btsocket_hci_raw_wakeup_input_task();
}
mtx_unlock(&ng_btsocket_hci_raw_queue_mtx);
} else {
NG_FREE_ITEM(item);
error = EINVAL;
}
return (error);
} /* ng_btsocket_hci_raw_node_rcvmsg */
/*
* Receive packet from the one of our hook.
* Prepend every packet with sockaddr_hci and record sender's node name.
* Enqueue item and schedule input task.
*/
static int
ng_btsocket_hci_raw_node_rcvdata(hook_p hook, item_p item)
{
struct mbuf *nam = NULL;
int error;
/*
* Check for empty sockets list creates LOR when both sender and
* receiver device are connected to the same host, so remove it
* for now
*/
MGET(nam, M_NOWAIT, MT_SONAME);
if (nam != NULL) {
struct sockaddr_hci *sa = mtod(nam, struct sockaddr_hci *);
nam->m_len = sizeof(struct sockaddr_hci);
sa->hci_len = sizeof(*sa);
sa->hci_family = AF_BLUETOOTH;
strlcpy(sa->hci_node, NG_PEER_NODE_NAME(hook),
sizeof(sa->hci_node));
NGI_GET_M(item, nam->m_next);
NGI_M(item) = nam;
mtx_lock(&ng_btsocket_hci_raw_queue_mtx);
if (NG_BT_ITEMQ_FULL(&ng_btsocket_hci_raw_queue)) {
NG_BTSOCKET_HCI_RAW_ERR(
"%s: Input queue is full\n", __func__);
NG_BT_ITEMQ_DROP(&ng_btsocket_hci_raw_queue);
NG_FREE_ITEM(item);
error = ENOBUFS;
} else {
NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_hci_raw_queue, item);
error = ng_btsocket_hci_raw_wakeup_input_task();
}
mtx_unlock(&ng_btsocket_hci_raw_queue_mtx);
} else {
NG_BTSOCKET_HCI_RAW_ERR(
"%s: Failed to allocate address mbuf\n", __func__);
NG_FREE_ITEM(item);
error = ENOBUFS;
}
return (error);
} /* ng_btsocket_hci_raw_node_rcvdata */
/****************************************************************************
****************************************************************************
** Sockets specific
****************************************************************************
****************************************************************************/
/*
* Get next token. We need token to avoid theoretical race where process
* submits ioctl() message then interrupts ioctl() and re-submits another
* ioctl() on the same socket *before* first ioctl() complete.
*/
static void
ng_btsocket_hci_raw_get_token(u_int32_t *token)
{
mtx_lock(&ng_btsocket_hci_raw_token_mtx);
if (++ ng_btsocket_hci_raw_token == 0)
ng_btsocket_hci_raw_token = 1;
*token = ng_btsocket_hci_raw_token;
mtx_unlock(&ng_btsocket_hci_raw_token_mtx);
} /* ng_btsocket_hci_raw_get_token */
/*
* Send Netgraph message to the node - do not expect reply
*/
static int
ng_btsocket_hci_raw_send_ngmsg(char *path, int cmd, void *arg, int arglen)
{
struct ng_mesg *msg = NULL;
int error = 0;
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, cmd, arglen, M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
if (arg != NULL && arglen > 0)
bcopy(arg, msg->data, arglen);
NG_SEND_MSG_PATH(error, ng_btsocket_hci_raw_node, msg, path, 0);
return (error);
} /* ng_btsocket_hci_raw_send_ngmsg */
/*
* Send Netgraph message to the node (no data) and wait for reply
*/
static int
ng_btsocket_hci_raw_send_sync_ngmsg(ng_btsocket_hci_raw_pcb_p pcb, char *path,
int cmd, void *rsp, int rsplen)
{
struct ng_mesg *msg = NULL;
int error = 0;
mtx_assert(&pcb->pcb_mtx, MA_OWNED);
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, cmd, 0, M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ng_btsocket_hci_raw_get_token(&msg->header.token);
pcb->token = msg->header.token;
pcb->msg = NULL;
NG_SEND_MSG_PATH(error, ng_btsocket_hci_raw_node, msg, path, 0);
if (error != 0) {
pcb->token = 0;
return (error);
}
error = msleep(&pcb->msg, &pcb->pcb_mtx, PZERO|PCATCH, "hcictl",
ng_btsocket_hci_raw_ioctl_timeout * hz);
pcb->token = 0;
if (error != 0)
return (error);
if (pcb->msg != NULL && pcb->msg->header.cmd == cmd)
bcopy(pcb->msg->data, rsp, rsplen);
else
error = EINVAL;
NG_FREE_MSG(pcb->msg); /* checks for != NULL */
return (0);
} /* ng_btsocket_hci_raw_send_sync_ngmsg */
/*
* Create control information for the packet
*/
static void
ng_btsocket_hci_raw_savctl(ng_btsocket_hci_raw_pcb_p pcb, struct mbuf **ctl,
struct mbuf *m)
{
int dir;
struct timeval tv;
mtx_assert(&pcb->pcb_mtx, MA_OWNED);
if (pcb->flags & NG_BTSOCKET_HCI_RAW_DIRECTION) {
dir = (m->m_flags & M_PROTO1)? 1 : 0;
*ctl = sbcreatecontrol((caddr_t) &dir, sizeof(dir),
SCM_HCI_RAW_DIRECTION, SOL_HCI_RAW);
if (*ctl != NULL)
ctl = &((*ctl)->m_next);
}
if (pcb->so->so_options & SO_TIMESTAMP) {
microtime(&tv);
*ctl = sbcreatecontrol((caddr_t) &tv, sizeof(tv),
SCM_TIMESTAMP, SOL_SOCKET);
if (*ctl != NULL)
ctl = &((*ctl)->m_next);
}
} /* ng_btsocket_hci_raw_savctl */
/*
* Raw HCI sockets data input routine
*/
static void
ng_btsocket_hci_raw_data_input(struct mbuf *nam)
{
ng_btsocket_hci_raw_pcb_p pcb = NULL;
struct mbuf *m0 = NULL, *m = NULL;
struct sockaddr_hci *sa = NULL;
m0 = nam->m_next;
nam->m_next = NULL;
KASSERT((nam->m_type == MT_SONAME),
("%s: m_type=%d\n", __func__, nam->m_type));
KASSERT((m0->m_flags & M_PKTHDR),
("%s: m_flags=%#x\n", __func__, m0->m_flags));
sa = mtod(nam, struct sockaddr_hci *);
mtx_lock(&ng_btsocket_hci_raw_sockets_mtx);
LIST_FOREACH(pcb, &ng_btsocket_hci_raw_sockets, next) {
mtx_lock(&pcb->pcb_mtx);
/*
* If socket was bound then check address and
* make sure it matches.
*/
if (pcb->addr.hci_node[0] != 0 &&
strcmp(sa->hci_node, pcb->addr.hci_node) != 0)
goto next;
/*
* Check packet against filters
* XXX do we have to call m_pullup() here?
*/
if (ng_btsocket_hci_raw_filter(pcb, m0, 1) != 0)
goto next;
/*
* Make a copy of the packet, append to the socket's
* receive queue and wakeup socket. sbappendaddr()
* will check if socket has enough buffer space.
*/
m = m_dup(m0, M_NOWAIT);
if (m != NULL) {
struct mbuf *ctl = NULL;
ng_btsocket_hci_raw_savctl(pcb, &ctl, m);
if (sbappendaddr(&pcb->so->so_rcv,
(struct sockaddr *) sa, m, ctl))
sorwakeup(pcb->so);
else {
NG_BTSOCKET_HCI_RAW_INFO(
"%s: sbappendaddr() failed\n", __func__);
NG_FREE_M(m);
NG_FREE_M(ctl);
}
}
next:
mtx_unlock(&pcb->pcb_mtx);
}
mtx_unlock(&ng_btsocket_hci_raw_sockets_mtx);
NG_FREE_M(nam);
NG_FREE_M(m0);
} /* ng_btsocket_hci_raw_data_input */
/*
* Raw HCI sockets message input routine
*/
static void
ng_btsocket_hci_raw_msg_input(struct ng_mesg *msg)
{
ng_btsocket_hci_raw_pcb_p pcb = NULL;
mtx_lock(&ng_btsocket_hci_raw_sockets_mtx);
LIST_FOREACH(pcb, &ng_btsocket_hci_raw_sockets, next) {
mtx_lock(&pcb->pcb_mtx);
if (msg->header.token == pcb->token) {
pcb->msg = msg;
wakeup(&pcb->msg);
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_hci_raw_sockets_mtx);
return;
}
mtx_unlock(&pcb->pcb_mtx);
}
mtx_unlock(&ng_btsocket_hci_raw_sockets_mtx);
NG_FREE_MSG(msg); /* checks for != NULL */
} /* ng_btsocket_hci_raw_msg_input */
/*
* Raw HCI sockets input routines
*/
static void
ng_btsocket_hci_raw_input(void *context, int pending)
{
item_p item = NULL;
for (;;) {
mtx_lock(&ng_btsocket_hci_raw_queue_mtx);
NG_BT_ITEMQ_DEQUEUE(&ng_btsocket_hci_raw_queue, item);
mtx_unlock(&ng_btsocket_hci_raw_queue_mtx);
if (item == NULL)
break;
switch(item->el_flags & NGQF_TYPE) {
case NGQF_DATA: {
struct mbuf *m = NULL;
NGI_GET_M(item, m);
ng_btsocket_hci_raw_data_input(m);
} break;
case NGQF_MESG: {
struct ng_mesg *msg = NULL;
NGI_GET_MSG(item, msg);
ng_btsocket_hci_raw_msg_input(msg);
} break;
default:
KASSERT(0,
("%s: invalid item type=%ld\n", __func__, (item->el_flags & NGQF_TYPE)));
break;
}
NG_FREE_ITEM(item);
}
} /* ng_btsocket_hci_raw_input */
/*
* Raw HCI sockets output routine
*/
static void
ng_btsocket_hci_raw_output(node_p node, hook_p hook, void *arg1, int arg2)
{
struct mbuf *nam = (struct mbuf *) arg1, *m = NULL;
struct sockaddr_hci *sa = NULL;
int error;
m = nam->m_next;
nam->m_next = NULL;
KASSERT((nam->m_type == MT_SONAME),
("%s: m_type=%d\n", __func__, nam->m_type));
KASSERT((m->m_flags & M_PKTHDR),
("%s: m_flags=%#x\n", __func__, m->m_flags));
sa = mtod(nam, struct sockaddr_hci *);
/*
* Find downstream hook
* XXX For now access node hook list directly. Should be safe because
* we used ng_send_fn() and we should have exclusive lock on the node.
*/
LIST_FOREACH(hook, &node->nd_hooks, hk_hooks) {
if (hook == NULL || NG_HOOK_NOT_VALID(hook) ||
NG_NODE_NOT_VALID(NG_PEER_NODE(hook)))
continue;
if (strcmp(sa->hci_node, NG_PEER_NODE_NAME(hook)) == 0) {
NG_SEND_DATA_ONLY(error, hook, m); /* sets m to NULL */
break;
}
}
NG_FREE_M(nam); /* check for != NULL */
NG_FREE_M(m);
} /* ng_btsocket_hci_raw_output */
/*
* Check frame against security and socket filters.
* d (direction bit) == 1 means incoming frame.
*/
static int
ng_btsocket_hci_raw_filter(ng_btsocket_hci_raw_pcb_p pcb, struct mbuf *m, int d)
{
int type, event, opcode;
mtx_assert(&pcb->pcb_mtx, MA_OWNED);
switch ((type = *mtod(m, u_int8_t *))) {
case NG_HCI_CMD_PKT:
if (!(pcb->flags & NG_BTSOCKET_HCI_RAW_PRIVILEGED)) {
opcode = le16toh(mtod(m, ng_hci_cmd_pkt_t *)->opcode);
if (!bit_test(
ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF(opcode) - 1],
NG_HCI_OCF(opcode) - 1))
return (EPERM);
}
if (d && !bit_test(pcb->filter.packet_mask, NG_HCI_CMD_PKT - 1))
return (EPERM);
break;
case NG_HCI_ACL_DATA_PKT:
case NG_HCI_SCO_DATA_PKT:
if (!(pcb->flags & NG_BTSOCKET_HCI_RAW_PRIVILEGED) ||
!bit_test(pcb->filter.packet_mask, type - 1) ||
!d)
return (EPERM);
break;
case NG_HCI_EVENT_PKT:
if (!d)
return (EINVAL);
event = mtod(m, ng_hci_event_pkt_t *)->event - 1;
if (!(pcb->flags & NG_BTSOCKET_HCI_RAW_PRIVILEGED))
if (!bit_test(ng_btsocket_hci_raw_sec_filter->events, event))
return (EPERM);
if (!bit_test(pcb->filter.event_mask, event))
return (EPERM);
break;
default:
return (EINVAL);
}
return (0);
} /* ng_btsocket_hci_raw_filter */
/*
* Initialize everything
*/
void
ng_btsocket_hci_raw_init(void)
{
bitstr_t *f = NULL;
int error = 0;
/* Skip initialization of globals for non-default instances. */
if (!IS_DEFAULT_VNET(curvnet))
return;
ng_btsocket_hci_raw_node = NULL;
ng_btsocket_hci_raw_debug_level = NG_BTSOCKET_WARN_LEVEL;
ng_btsocket_hci_raw_ioctl_timeout = 5;
/* Register Netgraph node type */
error = ng_newtype(&typestruct);
if (error != 0) {
NG_BTSOCKET_HCI_RAW_ALERT(
"%s: Could not register Netgraph node type, error=%d\n", __func__, error);
return;
}
/* Create Netgrapg node */
error = ng_make_node_common(&typestruct, &ng_btsocket_hci_raw_node);
if (error != 0) {
NG_BTSOCKET_HCI_RAW_ALERT(
"%s: Could not create Netgraph node, error=%d\n", __func__, error);
ng_btsocket_hci_raw_node = NULL;
return;
}
error = ng_name_node(ng_btsocket_hci_raw_node,
NG_BTSOCKET_HCI_RAW_NODE_TYPE);
if (error != 0) {
NG_BTSOCKET_HCI_RAW_ALERT(
"%s: Could not name Netgraph node, error=%d\n", __func__, error);
NG_NODE_UNREF(ng_btsocket_hci_raw_node);
ng_btsocket_hci_raw_node = NULL;
return;
}
/* Create input queue */
NG_BT_ITEMQ_INIT(&ng_btsocket_hci_raw_queue, 300);
mtx_init(&ng_btsocket_hci_raw_queue_mtx,
"btsocks_hci_raw_queue_mtx", NULL, MTX_DEF);
TASK_INIT(&ng_btsocket_hci_raw_task, 0,
ng_btsocket_hci_raw_input, NULL);
/* Create list of sockets */
LIST_INIT(&ng_btsocket_hci_raw_sockets);
mtx_init(&ng_btsocket_hci_raw_sockets_mtx,
"btsocks_hci_raw_sockets_mtx", NULL, MTX_DEF);
/* Tokens */
ng_btsocket_hci_raw_token = 0;
mtx_init(&ng_btsocket_hci_raw_token_mtx,
"btsocks_hci_raw_token_mtx", NULL, MTX_DEF);
/*
* Security filter
* XXX never free()ed
*/
ng_btsocket_hci_raw_sec_filter =
malloc(sizeof(struct ng_btsocket_hci_raw_sec_filter),
M_NETGRAPH_BTSOCKET_HCI_RAW, M_NOWAIT|M_ZERO);
if (ng_btsocket_hci_raw_sec_filter == NULL) {
printf("%s: Could not allocate security filter!\n", __func__);
return;
}
/*
* XXX How paranoid can we get?
*
* Initialize security filter. If bit is set in the mask then
* unprivileged socket is allowed to send (receive) this command
* (event).
*/
/* Enable all events */
memset(&ng_btsocket_hci_raw_sec_filter->events, 0xff,
sizeof(ng_btsocket_hci_raw_sec_filter->events)/
sizeof(ng_btsocket_hci_raw_sec_filter->events[0]));
/* Disable some critical events */
f = ng_btsocket_hci_raw_sec_filter->events;
bit_clear(f, NG_HCI_EVENT_RETURN_LINK_KEYS - 1);
bit_clear(f, NG_HCI_EVENT_LINK_KEY_NOTIFICATION - 1);
bit_clear(f, NG_HCI_EVENT_VENDOR - 1);
/* Commands - Link control */
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_LINK_CONTROL-1];
bit_set(f, NG_HCI_OCF_INQUIRY - 1);
bit_set(f, NG_HCI_OCF_INQUIRY_CANCEL - 1);
bit_set(f, NG_HCI_OCF_PERIODIC_INQUIRY - 1);
bit_set(f, NG_HCI_OCF_EXIT_PERIODIC_INQUIRY - 1);
bit_set(f, NG_HCI_OCF_REMOTE_NAME_REQ - 1);
bit_set(f, NG_HCI_OCF_READ_REMOTE_FEATURES - 1);
bit_set(f, NG_HCI_OCF_READ_REMOTE_VER_INFO - 1);
bit_set(f, NG_HCI_OCF_READ_CLOCK_OFFSET - 1);
/* Commands - Link policy */
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_LINK_POLICY-1];
bit_set(f, NG_HCI_OCF_ROLE_DISCOVERY - 1);
bit_set(f, NG_HCI_OCF_READ_LINK_POLICY_SETTINGS - 1);
/* Commands - Host controller and baseband */
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_HC_BASEBAND-1];
bit_set(f, NG_HCI_OCF_READ_PIN_TYPE - 1);
bit_set(f, NG_HCI_OCF_READ_LOCAL_NAME - 1);
bit_set(f, NG_HCI_OCF_READ_CON_ACCEPT_TIMO - 1);
bit_set(f, NG_HCI_OCF_READ_PAGE_TIMO - 1);
bit_set(f, NG_HCI_OCF_READ_SCAN_ENABLE - 1);
bit_set(f, NG_HCI_OCF_READ_PAGE_SCAN_ACTIVITY - 1);
bit_set(f, NG_HCI_OCF_READ_INQUIRY_SCAN_ACTIVITY - 1);
bit_set(f, NG_HCI_OCF_READ_AUTH_ENABLE - 1);
bit_set(f, NG_HCI_OCF_READ_ENCRYPTION_MODE - 1);
bit_set(f, NG_HCI_OCF_READ_UNIT_CLASS - 1);
bit_set(f, NG_HCI_OCF_READ_VOICE_SETTINGS - 1);
bit_set(f, NG_HCI_OCF_READ_AUTO_FLUSH_TIMO - 1);
bit_set(f, NG_HCI_OCF_READ_NUM_BROADCAST_RETRANS - 1);
bit_set(f, NG_HCI_OCF_READ_HOLD_MODE_ACTIVITY - 1);
bit_set(f, NG_HCI_OCF_READ_XMIT_LEVEL - 1);
bit_set(f, NG_HCI_OCF_READ_SCO_FLOW_CONTROL - 1);
bit_set(f, NG_HCI_OCF_READ_LINK_SUPERVISION_TIMO - 1);
bit_set(f, NG_HCI_OCF_READ_SUPPORTED_IAC_NUM - 1);
bit_set(f, NG_HCI_OCF_READ_IAC_LAP - 1);
bit_set(f, NG_HCI_OCF_READ_PAGE_SCAN_PERIOD - 1);
bit_set(f, NG_HCI_OCF_READ_PAGE_SCAN - 1);
/* Commands - Informational */
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_INFO - 1];
bit_set(f, NG_HCI_OCF_READ_LOCAL_VER - 1);
bit_set(f, NG_HCI_OCF_READ_LOCAL_FEATURES - 1);
bit_set(f, NG_HCI_OCF_READ_BUFFER_SIZE - 1);
bit_set(f, NG_HCI_OCF_READ_COUNTRY_CODE - 1);
bit_set(f, NG_HCI_OCF_READ_BDADDR - 1);
/* Commands - Status */
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_STATUS - 1];
bit_set(f, NG_HCI_OCF_READ_FAILED_CONTACT_CNTR - 1);
bit_set(f, NG_HCI_OCF_GET_LINK_QUALITY - 1);
bit_set(f, NG_HCI_OCF_READ_RSSI - 1);
/* Commands - Testing */
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_TESTING - 1];
bit_set(f, NG_HCI_OCF_READ_LOOPBACK_MODE - 1);
/*Commands - LE*/
f = ng_btsocket_hci_raw_sec_filter->commands[NG_HCI_OGF_LE -1];
} /* ng_btsocket_hci_raw_init */
/*
* Abort connection on socket
*/
void
ng_btsocket_hci_raw_abort(struct socket *so)
{
} /* ng_btsocket_hci_raw_abort */
void
ng_btsocket_hci_raw_close(struct socket *so)
{
} /* ng_btsocket_hci_raw_close */
/*
* Create new raw HCI socket
*/
int
ng_btsocket_hci_raw_attach(struct socket *so, int proto, struct thread *td)
{
ng_btsocket_hci_raw_pcb_p pcb = so2hci_raw_pcb(so);
int error = 0;
if (pcb != NULL)
return (EISCONN);
if (ng_btsocket_hci_raw_node == NULL)
return (EPROTONOSUPPORT);
if (proto != BLUETOOTH_PROTO_HCI)
return (EPROTONOSUPPORT);
if (so->so_type != SOCK_RAW)
return (ESOCKTNOSUPPORT);
error = soreserve(so, NG_BTSOCKET_HCI_RAW_SENDSPACE,
NG_BTSOCKET_HCI_RAW_RECVSPACE);
if (error != 0)
return (error);
pcb = malloc(sizeof(*pcb),
M_NETGRAPH_BTSOCKET_HCI_RAW, M_NOWAIT|M_ZERO);
if (pcb == NULL)
return (ENOMEM);
so->so_pcb = (caddr_t) pcb;
pcb->so = so;
if (priv_check(td, PRIV_NETBLUETOOTH_RAW) == 0)
pcb->flags |= NG_BTSOCKET_HCI_RAW_PRIVILEGED;
/*
* Set default socket filter. By default socket only accepts HCI
* Command_Complete and Command_Status event packets.
*/
bit_set(pcb->filter.event_mask, NG_HCI_EVENT_COMMAND_COMPL - 1);
bit_set(pcb->filter.event_mask, NG_HCI_EVENT_COMMAND_STATUS - 1);
mtx_init(&pcb->pcb_mtx, "btsocks_hci_raw_pcb_mtx", NULL, MTX_DEF);
mtx_lock(&ng_btsocket_hci_raw_sockets_mtx);
LIST_INSERT_HEAD(&ng_btsocket_hci_raw_sockets, pcb, next);
mtx_unlock(&ng_btsocket_hci_raw_sockets_mtx);
return (0);
} /* ng_btsocket_hci_raw_attach */
/*
* Bind raw HCI socket
*/
int
ng_btsocket_hci_raw_bind(struct socket *so, struct sockaddr *nam,
struct thread *td)
{
ng_btsocket_hci_raw_pcb_p pcb = so2hci_raw_pcb(so);
struct sockaddr_hci *sa = (struct sockaddr_hci *) nam;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_hci_raw_node == NULL)
return (EINVAL);
if (sa == NULL)
return (EINVAL);
if (sa->hci_family != AF_BLUETOOTH)
return (EAFNOSUPPORT);
if (sa->hci_len != sizeof(*sa))
return (EINVAL);
if (sa->hci_node[0] == 0)
return (EINVAL);
mtx_lock(&pcb->pcb_mtx);
bcopy(sa, &pcb->addr, sizeof(pcb->addr));
mtx_unlock(&pcb->pcb_mtx);
return (0);
} /* ng_btsocket_hci_raw_bind */
/*
* Connect raw HCI socket
*/
int
ng_btsocket_hci_raw_connect(struct socket *so, struct sockaddr *nam,
struct thread *td)
{
ng_btsocket_hci_raw_pcb_p pcb = so2hci_raw_pcb(so);
struct sockaddr_hci *sa = (struct sockaddr_hci *) nam;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_hci_raw_node == NULL)
return (EINVAL);