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freebsd-nq/sys/netgraph/bluetooth/socket/ng_btsocket_l2cap_raw.c
Robert Watson 395a08c904 Extend coverage of SOCK_LOCK(so) to include so_count, the socket 
reference count:

- Assert SOCK_LOCK(so) macros that directly manipulate so_count:
  soref(), sorele().

- Assert SOCK_LOCK(so) in macros/functions that rely on the state of
  so_count: sofree(), sotryfree().

- Acquire SOCK_LOCK(so) before calling these functions or macros in
  various contexts in the stack, both at the socket and protocol
  layers.

- In some cases, perform soisdisconnected() before sotryfree(), as
  this could result in frobbing of a non-present socket if
  sotryfree() actually frees the socket.

- Note that sofree()/sotryfree() will release the socket lock even if
  they don't free the socket.

Submitted by:	sam
Sponsored by:	FreeBSD Foundation
Obtained from:	BSD/OS
2004-06-12 20:47:32 +00:00

1309 lines
33 KiB
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/*
* ng_btsocket_l2cap_raw.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_l2cap_raw.c,v 1.12 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/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/protosw.h>
#include <sys/queue.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 <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_l2cap.h>
/* MALLOC define */
#ifdef NG_SEPARATE_MALLOC
MALLOC_DEFINE(M_NETGRAPH_BTSOCKET_L2CAP_RAW, "netgraph_btsocks_l2cap_raw",
"Netgraph Bluetooth raw L2CAP sockets");
#else
#define M_NETGRAPH_BTSOCKET_L2CAP_RAW M_NETGRAPH
#endif /* NG_SEPARATE_MALLOC */
/* Netgraph node methods */
static ng_constructor_t ng_btsocket_l2cap_raw_node_constructor;
static ng_rcvmsg_t ng_btsocket_l2cap_raw_node_rcvmsg;
static ng_shutdown_t ng_btsocket_l2cap_raw_node_shutdown;
static ng_newhook_t ng_btsocket_l2cap_raw_node_newhook;
static ng_connect_t ng_btsocket_l2cap_raw_node_connect;
static ng_rcvdata_t ng_btsocket_l2cap_raw_node_rcvdata;
static ng_disconnect_t ng_btsocket_l2cap_raw_node_disconnect;
static void ng_btsocket_l2cap_raw_input (void *, int);
static void ng_btsocket_l2cap_raw_rtclean (void *, int);
static void ng_btsocket_l2cap_raw_get_token (u_int32_t *);
static int ng_btsocket_l2cap_raw_send_ngmsg
(hook_p, int, void *, int);
static int ng_btsocket_l2cap_raw_send_sync_ngmsg
(ng_btsocket_l2cap_raw_pcb_p, int, void *, int);
#define ng_btsocket_l2cap_raw_wakeup_input_task() \
taskqueue_enqueue(taskqueue_swi_giant, &ng_btsocket_l2cap_raw_queue_task)
#define ng_btsocket_l2cap_raw_wakeup_route_task() \
taskqueue_enqueue(taskqueue_swi_giant, &ng_btsocket_l2cap_raw_rt_task)
/* Netgraph type descriptor */
static struct ng_type typestruct = {
.version = NG_ABI_VERSION,
.name = NG_BTSOCKET_L2CAP_RAW_NODE_TYPE,
.constructor = ng_btsocket_l2cap_raw_node_constructor,
.rcvmsg = ng_btsocket_l2cap_raw_node_rcvmsg,
.shutdown = ng_btsocket_l2cap_raw_node_shutdown,
.newhook = ng_btsocket_l2cap_raw_node_newhook,
.connect = ng_btsocket_l2cap_raw_node_connect,
.rcvdata = ng_btsocket_l2cap_raw_node_rcvdata,
.disconnect = ng_btsocket_l2cap_raw_node_disconnect,
};
/* Globals */
extern int ifqmaxlen;
static u_int32_t ng_btsocket_l2cap_raw_debug_level;
static u_int32_t ng_btsocket_l2cap_raw_ioctl_timeout;
static node_p ng_btsocket_l2cap_raw_node;
static struct ng_bt_itemq ng_btsocket_l2cap_raw_queue;
static struct mtx ng_btsocket_l2cap_raw_queue_mtx;
static struct task ng_btsocket_l2cap_raw_queue_task;
static LIST_HEAD(, ng_btsocket_l2cap_raw_pcb) ng_btsocket_l2cap_raw_sockets;
static struct mtx ng_btsocket_l2cap_raw_sockets_mtx;
static u_int32_t ng_btsocket_l2cap_raw_token;
static struct mtx ng_btsocket_l2cap_raw_token_mtx;
static LIST_HEAD(, ng_btsocket_l2cap_rtentry) ng_btsocket_l2cap_raw_rt;
static struct mtx ng_btsocket_l2cap_raw_rt_mtx;
static struct task ng_btsocket_l2cap_raw_rt_task;
/* Sysctl tree */
SYSCTL_DECL(_net_bluetooth_l2cap_sockets);
SYSCTL_NODE(_net_bluetooth_l2cap_sockets, OID_AUTO, raw, CTLFLAG_RW,
0, "Bluetooth raw L2CAP sockets family");
SYSCTL_INT(_net_bluetooth_l2cap_sockets_raw, OID_AUTO, debug_level,
CTLFLAG_RW,
&ng_btsocket_l2cap_raw_debug_level, NG_BTSOCKET_WARN_LEVEL,
"Bluetooth raw L2CAP sockets debug level");
SYSCTL_INT(_net_bluetooth_l2cap_sockets_raw, OID_AUTO, ioctl_timeout,
CTLFLAG_RW,
&ng_btsocket_l2cap_raw_ioctl_timeout, 5,
"Bluetooth raw L2CAP sockets ioctl timeout");
SYSCTL_INT(_net_bluetooth_l2cap_sockets_raw, OID_AUTO, queue_len,
CTLFLAG_RD,
&ng_btsocket_l2cap_raw_queue.len, 0,
"Bluetooth raw L2CAP sockets input queue length");
SYSCTL_INT(_net_bluetooth_l2cap_sockets_raw, OID_AUTO, queue_maxlen,
CTLFLAG_RD,
&ng_btsocket_l2cap_raw_queue.maxlen, 0,
"Bluetooth raw L2CAP sockets input queue max. length");
SYSCTL_INT(_net_bluetooth_l2cap_sockets_raw, OID_AUTO, queue_drops,
CTLFLAG_RD,
&ng_btsocket_l2cap_raw_queue.drops, 0,
"Bluetooth raw L2CAP sockets input queue drops");
/* Debug */
#define NG_BTSOCKET_L2CAP_RAW_INFO \
if (ng_btsocket_l2cap_raw_debug_level >= NG_BTSOCKET_INFO_LEVEL) \
printf
#define NG_BTSOCKET_L2CAP_RAW_WARN \
if (ng_btsocket_l2cap_raw_debug_level >= NG_BTSOCKET_WARN_LEVEL) \
printf
#define NG_BTSOCKET_L2CAP_RAW_ERR \
if (ng_btsocket_l2cap_raw_debug_level >= NG_BTSOCKET_ERR_LEVEL) \
printf
#define NG_BTSOCKET_L2CAP_RAW_ALERT \
if (ng_btsocket_l2cap_raw_debug_level >= NG_BTSOCKET_ALERT_LEVEL) \
printf
/*****************************************************************************
*****************************************************************************
** Netgraph node interface
*****************************************************************************
*****************************************************************************/
/*
* Netgraph node constructor. Do not allow to create node of this type.
*/
static int
ng_btsocket_l2cap_raw_node_constructor(node_p node)
{
return (EINVAL);
} /* ng_btsocket_l2cap_raw_node_constructor */
/*
* Do local shutdown processing. Let old node go and create new fresh one.
*/
static int
ng_btsocket_l2cap_raw_node_shutdown(node_p node)
{
int error = 0;
NG_NODE_UNREF(node);
/* Create new node */
error = ng_make_node_common(&typestruct, &ng_btsocket_l2cap_raw_node);
if (error != 0) {
NG_BTSOCKET_L2CAP_RAW_ALERT(
"%s: Could not create Netgraph node, error=%d\n", __func__, error);
ng_btsocket_l2cap_raw_node = NULL;
return (error);
}
error = ng_name_node(ng_btsocket_l2cap_raw_node,
NG_BTSOCKET_L2CAP_RAW_NODE_TYPE);
if (error != 0) {
NG_BTSOCKET_L2CAP_RAW_ALERT(
"%s: Could not name Netgraph node, error=%d\n", __func__, error);
NG_NODE_UNREF(ng_btsocket_l2cap_raw_node);
ng_btsocket_l2cap_raw_node = NULL;
return (error);
}
return (0);
} /* ng_btsocket_l2cap_raw_node_shutdown */
/*
* We allow any hook to be connected to the node.
*/
static int
ng_btsocket_l2cap_raw_node_newhook(node_p node, hook_p hook, char const *name)
{
return (0);
} /* ng_btsocket_l2cap_raw_node_newhook */
/*
* Just say "YEP, that's OK by me!"
*/
static int
ng_btsocket_l2cap_raw_node_connect(hook_p hook)
{
NG_HOOK_SET_PRIVATE(hook, NULL);
NG_HOOK_REF(hook); /* Keep extra reference to the hook */
return (0);
} /* ng_btsocket_l2cap_raw_node_connect */
/*
* Hook disconnection. Schedule route cleanup task
*/
static int
ng_btsocket_l2cap_raw_node_disconnect(hook_p hook)
{
/*
* If hook has private information than we must have this hook in
* the routing table and must schedule cleaning for the routing table.
* Otherwise hook was connected but we never got "hook_info" message,
* so we have never added this hook to the routing table and it save
* to just delete it.
*/
if (NG_HOOK_PRIVATE(hook) != NULL)
return (ng_btsocket_l2cap_raw_wakeup_route_task());
NG_HOOK_UNREF(hook); /* Remove extra reference */
return (0);
} /* ng_btsocket_l2cap_raw_node_disconnect */
/*
* Process incoming messages
*/
static int
ng_btsocket_l2cap_raw_node_rcvmsg(node_p node, item_p item, hook_p hook)
{
struct ng_mesg *msg = NGI_MSG(item); /* item still has message */
int error = 0;
if (msg != NULL && msg->header.typecookie == NGM_L2CAP_COOKIE) {
/*
* NGM_L2CAP_NODE_HOOK_INFO is special message initiated by
* L2CAP layer. Ignore all other messages if they are not
* replies or token is zero
*/
if (msg->header.cmd != NGM_L2CAP_NODE_HOOK_INFO) {
if (msg->header.token == 0 ||
!(msg->header.flags & NGF_RESP)) {
NG_FREE_ITEM(item);
return (0);
}
}
mtx_lock(&ng_btsocket_l2cap_raw_queue_mtx);
if (NG_BT_ITEMQ_FULL(&ng_btsocket_l2cap_raw_queue)) {
NG_BTSOCKET_L2CAP_RAW_ERR(
"%s: Input queue is full\n", __func__);
NG_BT_ITEMQ_DROP(&ng_btsocket_l2cap_raw_queue);
NG_FREE_ITEM(item);
error = ENOBUFS;
} else {
if (hook != NULL) {
NG_HOOK_REF(hook);
NGI_SET_HOOK(item, hook);
}
NG_BT_ITEMQ_ENQUEUE(&ng_btsocket_l2cap_raw_queue, item);
error = ng_btsocket_l2cap_raw_wakeup_input_task();
}
mtx_unlock(&ng_btsocket_l2cap_raw_queue_mtx);
} else {
NG_FREE_ITEM(item);
error = EINVAL;
}
return (error);
} /* ng_btsocket_l2cap_raw_node_rcvmsg */
/*
* Receive data on a hook
*/
static int
ng_btsocket_l2cap_raw_node_rcvdata(hook_p hook, item_p item)
{
NG_FREE_ITEM(item);
return (EINVAL);
} /* ng_btsocket_l2cap_raw_node_rcvdata */
/*****************************************************************************
*****************************************************************************
** Socket interface
*****************************************************************************
*****************************************************************************/
/*
* L2CAP sockets input routine
*/
static void
ng_btsocket_l2cap_raw_input(void *context, int pending)
{
item_p item = NULL;
hook_p hook = NULL;
struct ng_mesg *msg = NULL;
for (;;) {
mtx_lock(&ng_btsocket_l2cap_raw_queue_mtx);
NG_BT_ITEMQ_DEQUEUE(&ng_btsocket_l2cap_raw_queue, item);
mtx_unlock(&ng_btsocket_l2cap_raw_queue_mtx);
if (item == NULL)
break;
KASSERT((item->el_flags & NGQF_TYPE) == NGQF_MESG,
("%s: invalid item type=%ld\n", __func__, (item->el_flags & NGQF_TYPE)));
NGI_GET_MSG(item, msg);
NGI_GET_HOOK(item, hook);
NG_FREE_ITEM(item);
switch (msg->header.cmd) {
case NGM_L2CAP_NODE_HOOK_INFO: {
ng_btsocket_l2cap_rtentry_t *rt = NULL;
if (hook == NULL || NG_HOOK_NOT_VALID(hook) ||
msg->header.arglen != sizeof(bdaddr_t))
break;
if (bcmp(msg->data, NG_HCI_BDADDR_ANY,
sizeof(bdaddr_t)) == 0)
break;
mtx_lock(&ng_btsocket_l2cap_raw_rt_mtx);
rt = (ng_btsocket_l2cap_rtentry_t *)
NG_HOOK_PRIVATE(hook);
if (rt == NULL) {
MALLOC(rt, ng_btsocket_l2cap_rtentry_p,
sizeof(*rt),
M_NETGRAPH_BTSOCKET_L2CAP_RAW,
M_NOWAIT|M_ZERO);
if (rt == NULL) {
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
break;
}
LIST_INSERT_HEAD(&ng_btsocket_l2cap_raw_rt,
rt, next);
NG_HOOK_SET_PRIVATE(hook, rt);
}
bcopy(msg->data, &rt->src, sizeof(rt->src));
rt->hook = hook;
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
NG_BTSOCKET_L2CAP_RAW_INFO(
"%s: Updating hook \"%s\", src bdaddr=%x:%x:%x:%x:%x:%x\n",
__func__, NG_HOOK_NAME(hook),
rt->src.b[5], rt->src.b[4], rt->src.b[3],
rt->src.b[2], rt->src.b[1], rt->src.b[0]);
} break;
case NGM_L2CAP_NODE_GET_FLAGS:
case NGM_L2CAP_NODE_GET_DEBUG:
case NGM_L2CAP_NODE_GET_CON_LIST:
case NGM_L2CAP_NODE_GET_CHAN_LIST:
case NGM_L2CAP_NODE_GET_AUTO_DISCON_TIMO:
case NGM_L2CAP_L2CA_PING:
case NGM_L2CAP_L2CA_GET_INFO: {
ng_btsocket_l2cap_raw_pcb_p pcb = NULL;
mtx_lock(&ng_btsocket_l2cap_raw_sockets_mtx);
LIST_FOREACH(pcb,&ng_btsocket_l2cap_raw_sockets,next) {
mtx_lock(&pcb->pcb_mtx);
if (pcb->token == msg->header.token) {
pcb->msg = msg;
msg = NULL;
wakeup(&pcb->msg);
mtx_unlock(&pcb->pcb_mtx);
break;
}
mtx_unlock(&pcb->pcb_mtx);
}
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
} break;
default:
NG_BTSOCKET_L2CAP_RAW_WARN(
"%s: Unknown message, cmd=%d\n", __func__, msg->header.cmd);
break;
}
if (hook != NULL)
NG_HOOK_UNREF(hook); /* remove extra reference */
NG_FREE_MSG(msg); /* Checks for msg != NULL */
}
} /* ng_btsocket_l2cap_raw_input */
/*
* Route cleanup task. Gets scheduled when hook is disconnected. Here we
* will find all sockets that use "invalid" hook and disconnect them.
*/
static void
ng_btsocket_l2cap_raw_rtclean(void *context, int pending)
{
ng_btsocket_l2cap_raw_pcb_p pcb = NULL;
ng_btsocket_l2cap_rtentry_p rt = NULL;
mtx_lock(&ng_btsocket_l2cap_raw_rt_mtx);
mtx_lock(&ng_btsocket_l2cap_raw_sockets_mtx);
/*
* First disconnect all sockets that use "invalid" hook
*/
LIST_FOREACH(pcb, &ng_btsocket_l2cap_raw_sockets, next) {
mtx_lock(&pcb->pcb_mtx);
if (pcb->rt != NULL &&
pcb->rt->hook != NULL && NG_HOOK_NOT_VALID(pcb->rt->hook)) {
if (pcb->so != NULL &&
pcb->so->so_state & SS_ISCONNECTED)
soisdisconnected(pcb->so);
pcb->rt = NULL;
}
mtx_unlock(&pcb->pcb_mtx);
}
/*
* Now cleanup routing table
*/
for (rt = LIST_FIRST(&ng_btsocket_l2cap_raw_rt); rt != NULL; ) {
ng_btsocket_l2cap_rtentry_p rt_next = LIST_NEXT(rt, next);
if (rt->hook != NULL && NG_HOOK_NOT_VALID(rt->hook)) {
LIST_REMOVE(rt, next);
NG_HOOK_SET_PRIVATE(rt->hook, NULL);
NG_HOOK_UNREF(rt->hook); /* Remove extra reference */
bzero(rt, sizeof(*rt));
FREE(rt, M_NETGRAPH_BTSOCKET_L2CAP_RAW);
}
rt = rt_next;
}
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
} /* ng_btsocket_l2cap_raw_rtclean */
/*
* Initialize everything
*/
void
ng_btsocket_l2cap_raw_init(void)
{
int error = 0;
ng_btsocket_l2cap_raw_node = NULL;
ng_btsocket_l2cap_raw_debug_level = NG_BTSOCKET_WARN_LEVEL;
ng_btsocket_l2cap_raw_ioctl_timeout = 5;
/* Register Netgraph node type */
error = ng_newtype(&typestruct);
if (error != 0) {
NG_BTSOCKET_L2CAP_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_l2cap_raw_node);
if (error != 0) {
NG_BTSOCKET_L2CAP_RAW_ALERT(
"%s: Could not create Netgraph node, error=%d\n", __func__, error);
ng_btsocket_l2cap_raw_node = NULL;
return;
}
error = ng_name_node(ng_btsocket_l2cap_raw_node,
NG_BTSOCKET_L2CAP_RAW_NODE_TYPE);
if (error != 0) {
NG_BTSOCKET_L2CAP_RAW_ALERT(
"%s: Could not name Netgraph node, error=%d\n", __func__, error);
NG_NODE_UNREF(ng_btsocket_l2cap_raw_node);
ng_btsocket_l2cap_raw_node = NULL;
return;
}
/* Create input queue */
NG_BT_ITEMQ_INIT(&ng_btsocket_l2cap_raw_queue, ifqmaxlen);
mtx_init(&ng_btsocket_l2cap_raw_queue_mtx,
"btsocks_l2cap_queue_mtx", NULL, MTX_DEF);
TASK_INIT(&ng_btsocket_l2cap_raw_queue_task, 0,
ng_btsocket_l2cap_raw_input, NULL);
/* Create list of sockets */
LIST_INIT(&ng_btsocket_l2cap_raw_sockets);
mtx_init(&ng_btsocket_l2cap_raw_sockets_mtx,
"btsocks_l2cap_sockets_mtx", NULL, MTX_DEF);
/* Tokens */
ng_btsocket_l2cap_raw_token = 0;
mtx_init(&ng_btsocket_l2cap_raw_token_mtx,
"btsocks_l2cap_token_mtx", NULL, MTX_DEF);
/* Routing table */
LIST_INIT(&ng_btsocket_l2cap_raw_rt);
mtx_init(&ng_btsocket_l2cap_raw_rt_mtx,
"btsocks_l2cap_rt_mtx", NULL, MTX_DEF);
TASK_INIT(&ng_btsocket_l2cap_raw_rt_task, 0,
ng_btsocket_l2cap_raw_rtclean, NULL);
} /* ng_btsocket_l2cap_raw_init */
/*
* Abort connection on socket
*/
int
ng_btsocket_l2cap_raw_abort(struct socket *so)
{
return (ng_btsocket_l2cap_raw_detach(so));
} /* ng_btsocket_l2cap_raw_abort */
/*
* Create and attach new socket
*/
int
ng_btsocket_l2cap_raw_attach(struct socket *so, int proto, struct thread *td)
{
ng_btsocket_l2cap_raw_pcb_p pcb = so2l2cap_raw_pcb(so);
int error;
if (pcb != NULL)
return (EISCONN);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EPROTONOSUPPORT);
if (so->so_type != SOCK_RAW)
return (ESOCKTNOSUPPORT);
/* Reserve send and receive space if it is not reserved yet */
error = soreserve(so, NG_BTSOCKET_L2CAP_RAW_SENDSPACE,
NG_BTSOCKET_L2CAP_RAW_RECVSPACE);
if (error != 0)
return (error);
/* Allocate the PCB */
MALLOC(pcb, ng_btsocket_l2cap_raw_pcb_p, sizeof(*pcb),
M_NETGRAPH_BTSOCKET_L2CAP_RAW, M_NOWAIT|M_ZERO);
if (pcb == NULL)
return (ENOMEM);
/* Link the PCB and the socket */
so->so_pcb = (caddr_t) pcb;
pcb->so = so;
if (suser(td) == 0)
pcb->flags |= NG_BTSOCKET_L2CAP_RAW_PRIVILEGED;
mtx_init(&pcb->pcb_mtx, "btsocks_l2cap_raw_pcb_mtx", NULL, MTX_DEF);
/* Add the PCB to the list */
mtx_lock(&ng_btsocket_l2cap_raw_sockets_mtx);
LIST_INSERT_HEAD(&ng_btsocket_l2cap_raw_sockets, pcb, next);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
return (0);
} /* ng_btsocket_l2cap_raw_attach */
/*
* Bind socket
*/
int
ng_btsocket_l2cap_raw_bind(struct socket *so, struct sockaddr *nam,
struct thread *td)
{
ng_btsocket_l2cap_raw_pcb_t *pcb = so2l2cap_raw_pcb(so);
struct sockaddr_l2cap *sa = (struct sockaddr_l2cap *) nam;
ng_btsocket_l2cap_rtentry_t *rt = NULL;
int error;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
if (sa == NULL)
return (EINVAL);
if (sa->l2cap_family != AF_BLUETOOTH)
return (EAFNOSUPPORT);
if (sa->l2cap_len != sizeof(*sa))
return (EINVAL);
mtx_lock(&ng_btsocket_l2cap_raw_rt_mtx);
mtx_lock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_lock(&pcb->pcb_mtx);
pcb->rt = NULL;
bcopy(&sa->l2cap_bdaddr, &pcb->src, sizeof(pcb->src));
if (bcmp(&pcb->src, NG_HCI_BDADDR_ANY, sizeof(pcb->src)) == 0) {
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
return (0);
}
LIST_FOREACH(rt, &ng_btsocket_l2cap_raw_rt, next) {
if (rt->hook == NULL || NG_HOOK_NOT_VALID(rt->hook))
continue;
if (bcmp(&pcb->src, &rt->src, sizeof(rt->src)) == 0)
break;
}
if (rt != NULL) {
pcb->rt = rt;
error = 0;
} else
error = ENETDOWN;
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
return (error);
} /* ng_btsocket_l2cap_raw_bind */
/*
* Connect socket
*/
int
ng_btsocket_l2cap_raw_connect(struct socket *so, struct sockaddr *nam,
struct thread *td)
{
ng_btsocket_l2cap_raw_pcb_t *pcb = so2l2cap_raw_pcb(so);
struct sockaddr_l2cap *sa = (struct sockaddr_l2cap *) nam;
ng_btsocket_l2cap_rtentry_t *rt = NULL;
int error;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
if (sa == NULL)
return (EINVAL);
if (sa->l2cap_family != AF_BLUETOOTH)
return (EAFNOSUPPORT);
if (sa->l2cap_len != sizeof(*sa))
return (EINVAL);
if (bcmp(&sa->l2cap_bdaddr, NG_HCI_BDADDR_ANY, sizeof(bdaddr_t)) == 0)
return (EINVAL);
mtx_lock(&ng_btsocket_l2cap_raw_rt_mtx);
mtx_lock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_lock(&pcb->pcb_mtx);
bcopy(&sa->l2cap_bdaddr, &pcb->dst, sizeof(pcb->dst));
if (bcmp(&pcb->src, &pcb->dst, sizeof(pcb->src)) == 0) {
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
return (EADDRNOTAVAIL);
}
/*
* If there is route already - use it
*/
if (pcb->rt != NULL) {
soisconnected(so);
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
return (0);
}
/*
* Find the first hook that does not match specified destination address
*/
LIST_FOREACH(rt, &ng_btsocket_l2cap_raw_rt, next) {
if (rt->hook == NULL || NG_HOOK_NOT_VALID(rt->hook))
continue;
if (bcmp(&pcb->dst, &rt->src, sizeof(rt->src)) != 0)
break;
}
if (rt != NULL) {
soisconnected(so);
pcb->rt = rt;
bcopy(&rt->src, &pcb->src, sizeof(pcb->src));
error = 0;
} else
error = ENETDOWN;
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_rt_mtx);
return (error);
} /* ng_btsocket_l2cap_raw_connect */
/*
* Process ioctl's calls on socket
*/
int
ng_btsocket_l2cap_raw_control(struct socket *so, u_long cmd, caddr_t data,
struct ifnet *ifp, struct thread *td)
{
ng_btsocket_l2cap_raw_pcb_p pcb = so2l2cap_raw_pcb(so);
struct ng_mesg *msg = NULL;
int error = 0;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
mtx_lock(&pcb->pcb_mtx);
/* Check if we route info */
if (pcb->rt == NULL) {
mtx_unlock(&pcb->pcb_mtx);
return (EHOSTUNREACH);
}
/* Check if we have pending ioctl() */
if (pcb->token != 0) {
mtx_unlock(&pcb->pcb_mtx);
return (EBUSY);
}
switch (cmd) {
case SIOC_L2CAP_NODE_GET_FLAGS: {
struct ng_btsocket_l2cap_raw_node_flags *p =
(struct ng_btsocket_l2cap_raw_node_flags *) data;
error = ng_btsocket_l2cap_raw_send_sync_ngmsg(pcb,
NGM_L2CAP_NODE_GET_FLAGS,
&p->flags, sizeof(p->flags));
} break;
case SIOC_L2CAP_NODE_GET_DEBUG: {
struct ng_btsocket_l2cap_raw_node_debug *p =
(struct ng_btsocket_l2cap_raw_node_debug *) data;
error = ng_btsocket_l2cap_raw_send_sync_ngmsg(pcb,
NGM_L2CAP_NODE_GET_DEBUG,
&p->debug, sizeof(p->debug));
} break;
case SIOC_L2CAP_NODE_SET_DEBUG: {
struct ng_btsocket_l2cap_raw_node_debug *p =
(struct ng_btsocket_l2cap_raw_node_debug *) data;
if (pcb->flags & NG_BTSOCKET_L2CAP_RAW_PRIVILEGED)
error = ng_btsocket_l2cap_raw_send_ngmsg(pcb->rt->hook,
NGM_L2CAP_NODE_SET_DEBUG,
&p->debug, sizeof(p->debug));
else
error = EPERM;
} break;
case SIOC_L2CAP_NODE_GET_CON_LIST: {
struct ng_btsocket_l2cap_raw_con_list *p =
(struct ng_btsocket_l2cap_raw_con_list *) data;
ng_l2cap_node_con_list_ep *p1 = NULL;
ng_l2cap_node_con_ep *p2 = NULL;
if (p->num_connections == 0 ||
p->num_connections > NG_L2CAP_MAX_CON_NUM ||
p->connections == NULL) {
error = EINVAL;
break;
}
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, NGM_L2CAP_NODE_GET_CON_LIST,
0, M_NOWAIT);
if (msg == NULL) {
error = ENOMEM;
break;
}
ng_btsocket_l2cap_raw_get_token(&msg->header.token);
pcb->token = msg->header.token;
pcb->msg = NULL;
NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_raw_node, msg,
pcb->rt->hook, 0);
if (error != 0) {
pcb->token = 0;
break;
}
error = msleep(&pcb->msg, &pcb->pcb_mtx, PZERO|PCATCH, "l2ctl",
ng_btsocket_l2cap_raw_ioctl_timeout * hz);
pcb->token = 0;
if (error != 0)
break;
if (pcb->msg != NULL &&
pcb->msg->header.cmd == NGM_L2CAP_NODE_GET_CON_LIST) {
/* Return data back to user space */
p1 = (ng_l2cap_node_con_list_ep *)(pcb->msg->data);
p2 = (ng_l2cap_node_con_ep *)(p1 + 1);
p->num_connections = min(p->num_connections,
p1->num_connections);
if (p->num_connections > 0)
error = copyout((caddr_t) p2,
(caddr_t) p->connections,
p->num_connections * sizeof(*p2));
} else
error = EINVAL;
NG_FREE_MSG(pcb->msg); /* checks for != NULL */
} break;
case SIOC_L2CAP_NODE_GET_CHAN_LIST: {
struct ng_btsocket_l2cap_raw_chan_list *p =
(struct ng_btsocket_l2cap_raw_chan_list *) data;
ng_l2cap_node_chan_list_ep *p1 = NULL;
ng_l2cap_node_chan_ep *p2 = NULL;
if (p->num_channels == 0 ||
p->num_channels > NG_L2CAP_MAX_CHAN_NUM ||
p->channels == NULL) {
error = EINVAL;
break;
}
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE,
NGM_L2CAP_NODE_GET_CHAN_LIST, 0, M_NOWAIT);
if (msg == NULL) {
error = ENOMEM;
break;
}
ng_btsocket_l2cap_raw_get_token(&msg->header.token);
pcb->token = msg->header.token;
pcb->msg = NULL;
NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_raw_node, msg,
pcb->rt->hook, 0);
if (error != 0) {
pcb->token = 0;
break;
}
error = msleep(&pcb->msg, &pcb->pcb_mtx, PZERO|PCATCH, "l2ctl",
ng_btsocket_l2cap_raw_ioctl_timeout * hz);
pcb->token = 0;
if (error != 0)
break;
if (pcb->msg != NULL &&
pcb->msg->header.cmd == NGM_L2CAP_NODE_GET_CHAN_LIST) {
/* Return data back to user space */
p1 = (ng_l2cap_node_chan_list_ep *)(pcb->msg->data);
p2 = (ng_l2cap_node_chan_ep *)(p1 + 1);
p->num_channels = min(p->num_channels,
p1->num_channels);
if (p->num_channels > 0)
error = copyout((caddr_t) p2,
(caddr_t) p->channels,
p->num_channels * sizeof(*p2));
} else
error = EINVAL;
NG_FREE_MSG(pcb->msg); /* checks for != NULL */
} break;
case SIOC_L2CAP_L2CA_PING: {
struct ng_btsocket_l2cap_raw_ping *p =
(struct ng_btsocket_l2cap_raw_ping *) data;
ng_l2cap_l2ca_ping_ip *ip = NULL;
ng_l2cap_l2ca_ping_op *op = NULL;
if (!(pcb->flags & NG_BTSOCKET_L2CAP_RAW_PRIVILEGED)) {
error = EPERM;
break;
}
if ((p->echo_size != 0 && p->echo_data == NULL) ||
p->echo_size > NG_L2CAP_MAX_ECHO_SIZE) {
error = EINVAL;
break;
}
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE,
NGM_L2CAP_L2CA_PING, sizeof(*ip) + p->echo_size,
M_NOWAIT);
if (msg == NULL) {
error = ENOMEM;
break;
}
ng_btsocket_l2cap_raw_get_token(&msg->header.token);
pcb->token = msg->header.token;
pcb->msg = NULL;
ip = (ng_l2cap_l2ca_ping_ip *)(msg->data);
bcopy(&pcb->dst, &ip->bdaddr, sizeof(ip->bdaddr));
ip->echo_size = p->echo_size;
if (ip->echo_size > 0) {
error = copyin(p->echo_data, ip + 1, p->echo_size);
if (error != 0) {
NG_FREE_MSG(msg);
pcb->token = 0;
break;
}
}
NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_raw_node, msg,
pcb->rt->hook, 0);
if (error != 0) {
pcb->token = 0;
break;
}
error = msleep(&pcb->msg, &pcb->pcb_mtx, PZERO|PCATCH, "l2ctl",
bluetooth_l2cap_rtx_timeout());
pcb->token = 0;
if (error != 0)
break;
if (pcb->msg != NULL &&
pcb->msg->header.cmd == NGM_L2CAP_L2CA_PING) {
/* Return data back to the user space */
op = (ng_l2cap_l2ca_ping_op *)(pcb->msg->data);
p->result = op->result;
p->echo_size = min(p->echo_size, op->echo_size);
if (p->echo_size > 0)
error = copyout(op + 1, p->echo_data,
p->echo_size);
} else
error = EINVAL;
NG_FREE_MSG(pcb->msg); /* checks for != NULL */
} break;
case SIOC_L2CAP_L2CA_GET_INFO: {
struct ng_btsocket_l2cap_raw_get_info *p =
(struct ng_btsocket_l2cap_raw_get_info *) data;
ng_l2cap_l2ca_get_info_ip *ip = NULL;
ng_l2cap_l2ca_get_info_op *op = NULL;
if (!(pcb->flags & NG_BTSOCKET_L2CAP_RAW_PRIVILEGED)) {
error = EPERM;
break;
}
if (p->info_size != 0 && p->info_data == NULL) {
error = EINVAL;
break;
}
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE,
NGM_L2CAP_L2CA_GET_INFO, sizeof(*ip) + p->info_size,
M_NOWAIT);
if (msg == NULL) {
error = ENOMEM;
break;
}
ng_btsocket_l2cap_raw_get_token(&msg->header.token);
pcb->token = msg->header.token;
pcb->msg = NULL;
ip = (ng_l2cap_l2ca_get_info_ip *)(msg->data);
bcopy(&pcb->dst, &ip->bdaddr, sizeof(ip->bdaddr));
ip->info_type = p->info_type;
NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_raw_node, msg,
pcb->rt->hook, 0);
if (error != 0) {
pcb->token = 0;
break;
}
error = msleep(&pcb->msg, &pcb->pcb_mtx, PZERO|PCATCH, "l2ctl",
bluetooth_l2cap_rtx_timeout());
pcb->token = 0;
if (error != 0)
break;
if (pcb->msg != NULL &&
pcb->msg->header.cmd == NGM_L2CAP_L2CA_GET_INFO) {
/* Return data back to the user space */
op = (ng_l2cap_l2ca_get_info_op *)(pcb->msg->data);
p->result = op->result;
p->info_size = min(p->info_size, op->info_size);
if (p->info_size > 0)
error = copyout(op + 1, p->info_data,
p->info_size);
} else
error = EINVAL;
NG_FREE_MSG(pcb->msg); /* checks for != NULL */
} break;
case SIOC_L2CAP_NODE_GET_AUTO_DISCON_TIMO: {
struct ng_btsocket_l2cap_raw_auto_discon_timo *p =
(struct ng_btsocket_l2cap_raw_auto_discon_timo *) data;
error = ng_btsocket_l2cap_raw_send_sync_ngmsg(pcb,
NGM_L2CAP_NODE_GET_AUTO_DISCON_TIMO,
&p->timeout, sizeof(p->timeout));
} break;
case SIOC_L2CAP_NODE_SET_AUTO_DISCON_TIMO: {
struct ng_btsocket_l2cap_raw_auto_discon_timo *p =
(struct ng_btsocket_l2cap_raw_auto_discon_timo *) data;
if (pcb->flags & NG_BTSOCKET_L2CAP_RAW_PRIVILEGED)
error = ng_btsocket_l2cap_raw_send_ngmsg(pcb->rt->hook,
NGM_L2CAP_NODE_SET_AUTO_DISCON_TIMO,
&p->timeout, sizeof(p->timeout));
else
error = EPERM;
} break;
default:
error = EINVAL;
break;
}
mtx_unlock(&pcb->pcb_mtx);
return (error);
} /* ng_btsocket_l2cap_raw_control */
/*
* Detach and destroy socket
*/
int
ng_btsocket_l2cap_raw_detach(struct socket *so)
{
ng_btsocket_l2cap_raw_pcb_p pcb = so2l2cap_raw_pcb(so);
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
mtx_lock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_lock(&pcb->pcb_mtx);
LIST_REMOVE(pcb, next);
mtx_unlock(&pcb->pcb_mtx);
mtx_unlock(&ng_btsocket_l2cap_raw_sockets_mtx);
mtx_destroy(&pcb->pcb_mtx);
bzero(pcb, sizeof(*pcb));
FREE(pcb, M_NETGRAPH_BTSOCKET_L2CAP_RAW);
SOCK_LOCK(so);
so->so_pcb = NULL;
sotryfree(so);
return (0);
} /* ng_btsocket_l2cap_raw_detach */
/*
* Disconnect socket
*/
int
ng_btsocket_l2cap_raw_disconnect(struct socket *so)
{
ng_btsocket_l2cap_raw_pcb_p pcb = so2l2cap_raw_pcb(so);
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
mtx_lock(&pcb->pcb_mtx);
pcb->rt = NULL;
soisdisconnected(so);
mtx_unlock(&pcb->pcb_mtx);
return (0);
} /* ng_btsocket_l2cap_raw_disconnect */
/*
* Get peer address
*/
int
ng_btsocket_l2cap_raw_peeraddr(struct socket *so, struct sockaddr **nam)
{
ng_btsocket_l2cap_raw_pcb_p pcb = so2l2cap_raw_pcb(so);
struct sockaddr_l2cap sa;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
bcopy(&pcb->dst, &sa.l2cap_bdaddr, sizeof(sa.l2cap_bdaddr));
sa.l2cap_psm = 0;
sa.l2cap_len = sizeof(sa);
sa.l2cap_family = AF_BLUETOOTH;
*nam = sodupsockaddr((struct sockaddr *) &sa, M_NOWAIT);
return ((*nam == NULL)? ENOMEM : 0);
} /* ng_btsocket_l2cap_raw_peeraddr */
/*
* Send data to socket
*/
int
ng_btsocket_l2cap_raw_send(struct socket *so, int flags, struct mbuf *m,
struct sockaddr *nam, struct mbuf *control, struct thread *td)
{
NG_FREE_M(m); /* Checks for m != NULL */
NG_FREE_M(control);
return (EOPNOTSUPP);
} /* ng_btsocket_l2cap_raw_send */
/*
* Get socket address
*/
int
ng_btsocket_l2cap_raw_sockaddr(struct socket *so, struct sockaddr **nam)
{
ng_btsocket_l2cap_raw_pcb_p pcb = so2l2cap_raw_pcb(so);
struct sockaddr_l2cap sa;
if (pcb == NULL)
return (EINVAL);
if (ng_btsocket_l2cap_raw_node == NULL)
return (EINVAL);
bcopy(&pcb->src, &sa.l2cap_bdaddr, sizeof(sa.l2cap_bdaddr));
sa.l2cap_psm = 0;
sa.l2cap_len = sizeof(sa);
sa.l2cap_family = AF_BLUETOOTH;
*nam = sodupsockaddr((struct sockaddr *) &sa, M_NOWAIT);
return ((*nam == NULL)? ENOMEM : 0);
} /* ng_btsocket_l2cap_raw_sockaddr */
/*
* Get next token
*/
static void
ng_btsocket_l2cap_raw_get_token(u_int32_t *token)
{
mtx_lock(&ng_btsocket_l2cap_raw_token_mtx);
if (++ ng_btsocket_l2cap_raw_token == 0)
ng_btsocket_l2cap_raw_token = 1;
*token = ng_btsocket_l2cap_raw_token;
mtx_unlock(&ng_btsocket_l2cap_raw_token_mtx);
} /* ng_btsocket_l2cap_raw_get_token */
/*
* Send Netgraph message to the node - do not expect reply
*/
static int
ng_btsocket_l2cap_raw_send_ngmsg(hook_p hook, int cmd, void *arg, int arglen)
{
struct ng_mesg *msg = NULL;
int error = 0;
NG_MKMESSAGE(msg, NGM_L2CAP_COOKIE, cmd, arglen, M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
if (arg != NULL && arglen > 0)
bcopy(arg, msg->data, arglen);
NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_raw_node, msg, hook, 0);
return (error);
} /* ng_btsocket_l2cap_raw_send_ngmsg */
/*
* Send Netgraph message to the node (no data) and wait for reply
*/
static int
ng_btsocket_l2cap_raw_send_sync_ngmsg(ng_btsocket_l2cap_raw_pcb_p pcb,
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_L2CAP_COOKIE, cmd, 0, M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ng_btsocket_l2cap_raw_get_token(&msg->header.token);
pcb->token = msg->header.token;
pcb->msg = NULL;
NG_SEND_MSG_HOOK(error, ng_btsocket_l2cap_raw_node, msg,
pcb->rt->hook, 0);
if (error != 0) {
pcb->token = 0;
return (error);
}
error = msleep(&pcb->msg, &pcb->pcb_mtx, PZERO|PCATCH, "l2ctl",
ng_btsocket_l2cap_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_l2cap_raw_send_sync_ngmsg */
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