freebsd-dev/sys/netgraph/bluetooth/socket/ng_btsocket.c
Robert Watson a557af222b Introduce a MAC label reference in 'struct inpcb', which caches
the   MAC label referenced from 'struct socket' in the IPv4 and
IPv6-based protocols.  This permits MAC labels to be checked during
network delivery operations without dereferencing inp->inp_socket
to get to so->so_label, which will eventually avoid our having to
grab the socket lock during delivery at the network layer.

This change introduces 'struct inpcb' as a labeled object to the
MAC Framework, along with the normal circus of entry points:
initialization, creation from socket, destruction, as well as a
delivery access control check.

For most policies, the inpcb label will simply be a cache of the
socket label, so a new protocol switch method is introduced,
pr_sosetlabel() to notify protocols that the socket layer label
has been updated so that the cache can be updated while holding
appropriate locks.  Most protocols implement this using
pru_sosetlabel_null(), but IPv4/IPv6 protocols using inpcbs use
the the worker function in_pcbsosetlabel(), which calls into the
MAC Framework to perform a cache update.

Biba, LOMAC, and MLS implement these entry points, as do the stub
policy, and test policy.

Reviewed by:	sam, bms
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2003-11-18 00:39:07 +00:00

307 lines
9.2 KiB
C

/*
* ng_btsocket.c
*
* 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.c,v 1.4 2003/09/14 23:29:06 max Exp $
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bitstring.h>
#include <sys/errno.h>
#include <sys/domain.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include "ng_bluetooth.h"
#include "ng_hci.h"
#include "ng_l2cap.h"
#include "ng_btsocket.h"
#include "ng_btsocket_hci_raw.h"
#include "ng_btsocket_l2cap.h"
#include "ng_btsocket_rfcomm.h"
static int ng_btsocket_modevent (module_t, int, void *);
extern struct domain ng_btsocket_domain;
/*
* Bluetooth raw HCI sockets
*/
static struct pr_usrreqs ng_btsocket_hci_raw_usrreqs = {
ng_btsocket_hci_raw_abort, /* abort */
pru_accept_notsupp, /* accept */
ng_btsocket_hci_raw_attach, /* attach */
ng_btsocket_hci_raw_bind, /* bind */
ng_btsocket_hci_raw_connect, /* connect */
pru_connect2_notsupp, /* connect2 */
ng_btsocket_hci_raw_control, /* control */
ng_btsocket_hci_raw_detach, /* detach */
ng_btsocket_hci_raw_disconnect, /* disconnect */
pru_listen_notsupp, /* listen */
ng_btsocket_hci_raw_peeraddr, /* peeraddr */
pru_rcvd_notsupp, /* rcvd */
pru_rcvoob_notsupp, /* rcvoob */
ng_btsocket_hci_raw_send, /* send */
pru_sense_null, /* send */
NULL, /* shutdown */
ng_btsocket_hci_raw_sockaddr, /* sockaddr */
sosend,
soreceive,
sopoll,
pru_sosetlabel_null
};
/*
* Bluetooth raw L2CAP sockets
*/
static struct pr_usrreqs ng_btsocket_l2cap_raw_usrreqs = {
ng_btsocket_l2cap_raw_abort, /* abort */
pru_accept_notsupp, /* accept */
ng_btsocket_l2cap_raw_attach, /* attach */
ng_btsocket_l2cap_raw_bind, /* bind */
ng_btsocket_l2cap_raw_connect, /* connect */
pru_connect2_notsupp, /* connect2 */
ng_btsocket_l2cap_raw_control, /* control */
ng_btsocket_l2cap_raw_detach, /* detach */
ng_btsocket_l2cap_raw_disconnect, /* disconnect */
pru_listen_notsupp, /* listen */
ng_btsocket_l2cap_raw_peeraddr, /* peeraddr */
pru_rcvd_notsupp, /* rcvd */
pru_rcvoob_notsupp, /* rcvoob */
ng_btsocket_l2cap_raw_send, /* send */
pru_sense_null, /* send */
NULL, /* shutdown */
ng_btsocket_l2cap_raw_sockaddr, /* sockaddr */
sosend,
soreceive,
sopoll,
pru_sosetlabel_null
};
/*
* Bluetooth SEQPACKET L2CAP sockets
*/
static struct pr_usrreqs ng_btsocket_l2cap_usrreqs = {
ng_btsocket_l2cap_abort, /* abort */
ng_btsocket_l2cap_accept, /* accept */
ng_btsocket_l2cap_attach, /* attach */
ng_btsocket_l2cap_bind, /* bind */
ng_btsocket_l2cap_connect, /* connect */
pru_connect2_notsupp, /* connect2 */
ng_btsocket_l2cap_control, /* control */
ng_btsocket_l2cap_detach, /* detach */
ng_btsocket_l2cap_disconnect, /* disconnect */
ng_btsocket_l2cap_listen, /* listen */
ng_btsocket_l2cap_peeraddr, /* peeraddr */
pru_rcvd_notsupp, /* rcvd */
pru_rcvoob_notsupp, /* rcvoob */
ng_btsocket_l2cap_send, /* send */
pru_sense_null, /* send */
NULL, /* shutdown */
ng_btsocket_l2cap_sockaddr, /* sockaddr */
sosend,
soreceive,
sopoll,
pru_sosetlabel_null
};
/*
* Bluetooth STREAM RFCOMM sockets
*/
static struct pr_usrreqs ng_btsocket_rfcomm_usrreqs = {
ng_btsocket_rfcomm_abort, /* abort */
ng_btsocket_rfcomm_accept, /* accept */
ng_btsocket_rfcomm_attach, /* attach */
ng_btsocket_rfcomm_bind, /* bind */
ng_btsocket_rfcomm_connect, /* connect */
pru_connect2_notsupp, /* connect2 */
ng_btsocket_rfcomm_control, /* control */
ng_btsocket_rfcomm_detach, /* detach */
ng_btsocket_rfcomm_disconnect, /* disconnect */
ng_btsocket_rfcomm_listen, /* listen */
ng_btsocket_rfcomm_peeraddr, /* peeraddr */
pru_rcvd_notsupp, /* rcvd */
pru_rcvoob_notsupp, /* rcvoob */
ng_btsocket_rfcomm_send, /* send */
pru_sense_null, /* send */
NULL, /* shutdown */
ng_btsocket_rfcomm_sockaddr, /* sockaddr */
sosend,
soreceive,
sopoll,
pru_sosetlabel_null
};
/*
* Definitions of protocols supported in the BLUETOOTH domain
*/
static struct protosw ng_btsocket_protosw[] = {
{
SOCK_RAW, /* protocol type */
&ng_btsocket_domain, /* backpointer to domain */
BLUETOOTH_PROTO_HCI, /* protocol */
PR_ATOMIC | PR_ADDR, /* flags */
NULL, NULL, NULL, /* input, output, ctlinput */
ng_btsocket_hci_raw_ctloutput, /* ctloutput */
NULL, /* ousrreq() */
ng_btsocket_hci_raw_init, /* init */
NULL, NULL, NULL, /* fasttimeo, slowtimo, drain */
&ng_btsocket_hci_raw_usrreqs, /* usrreq table (above) */
/* { NULL } */ /* pfh (protocol filter head?) */
},
{
SOCK_RAW, /* protocol type */
&ng_btsocket_domain, /* backpointer to domain */
BLUETOOTH_PROTO_L2CAP, /* protocol */
PR_ATOMIC | PR_ADDR, /* flags */
NULL, NULL, NULL, /* input, output, ctlinput */
NULL, /* ctloutput */
NULL, /* ousrreq() */
ng_btsocket_l2cap_raw_init, /* init */
NULL, NULL, NULL, /* fasttimeo, slowtimo, drain */
&ng_btsocket_l2cap_raw_usrreqs, /* usrreq table (above) */
/* { NULL } */ /* pfh (protocol filter head?) */
},
{
SOCK_SEQPACKET, /* protocol type */
&ng_btsocket_domain, /* backpointer to domain */
BLUETOOTH_PROTO_L2CAP, /* protocol */
PR_ATOMIC | PR_CONNREQUIRED, /* flags */
NULL, NULL, NULL, /* input, output, ctlinput */
ng_btsocket_l2cap_ctloutput, /* ctloutput */
NULL, /* ousrreq() */
ng_btsocket_l2cap_init, /* init */
NULL, NULL, NULL, /* fasttimeo, slowtimo, drain */
&ng_btsocket_l2cap_usrreqs, /* usrreq table (above) */
/* { NULL } */ /* pfh (protocol filter head?) */
},
{
SOCK_STREAM, /* protocol type */
&ng_btsocket_domain, /* backpointer to domain */
BLUETOOTH_PROTO_RFCOMM, /* protocol */
PR_ATOMIC | PR_CONNREQUIRED, /* flags */
NULL, NULL, NULL, /* input, output, ctlinput */
ng_btsocket_rfcomm_ctloutput, /* ctloutput */
NULL, /* ousrreq() */
ng_btsocket_rfcomm_init, /* init */
NULL, NULL, NULL, /* fasttimeo, slowtimo, drain */
&ng_btsocket_rfcomm_usrreqs, /* usrreq table (above) */
/* { NULL } */ /* pfh (protocol filter head?) */
}
};
#define ng_btsocket_protosw_size \
(sizeof(ng_btsocket_protosw)/sizeof(ng_btsocket_protosw[0]))
#define ng_btsocket_protosw_end \
&ng_btsocket_protosw[ng_btsocket_protosw_size]
/*
* BLUETOOTH domain
*/
struct domain ng_btsocket_domain = {
AF_BLUETOOTH, /* family */
"bluetooth", /* domain name */
NULL, /* init() */
NULL, /* externalize() */
NULL, /* dispose() */
ng_btsocket_protosw, /* protosw entry */
ng_btsocket_protosw_end, /* end of protosw entries */
NULL, /* next domain in list */
NULL, /* rtattach() */
0, /* arg to rtattach in bits */
0 /* maxrtkey */
};
/*
* Socket sysctl tree
*/
SYSCTL_NODE(_net_bluetooth_hci, OID_AUTO, sockets, CTLFLAG_RW,
0, "Bluetooth HCI sockets family");
SYSCTL_NODE(_net_bluetooth_l2cap, OID_AUTO, sockets, CTLFLAG_RW,
0, "Bluetooth L2CAP sockets family");
SYSCTL_NODE(_net_bluetooth_rfcomm, OID_AUTO, sockets, CTLFLAG_RW,
0, "Bluetooth RFCOMM sockets family");
/*
* Module
*/
static moduledata_t ng_btsocket_mod = {
"ng_btsocket",
ng_btsocket_modevent,
NULL
};
DECLARE_MODULE(ng_btsocket, ng_btsocket_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_VERSION(ng_btsocket, NG_BLUETOOTH_VERSION);
MODULE_DEPEND(ng_btsocket, ng_bluetooth, NG_BLUETOOTH_VERSION,
NG_BLUETOOTH_VERSION, NG_BLUETOOTH_VERSION);
MODULE_DEPEND(ng_btsocket, netgraph, NG_ABI_VERSION,
NG_ABI_VERSION, NG_ABI_VERSION);
/*
* Handle loading and unloading for this node type.
* This is to handle auxiliary linkages (e.g protocol domain addition).
*/
static int
ng_btsocket_modevent(module_t mod, int event, void *data)
{
int error = 0;
switch (event) {
case MOD_LOAD:
net_add_domain(&ng_btsocket_domain);
break;
case MOD_UNLOAD:
/* XXX can't unload protocol domain yet */
error = EBUSY;
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
} /* ng_btsocket_modevent */