| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/mwl/@/netgraph/bluetooth/l2cap/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/mwl/@/netgraph/bluetooth/l2cap/ng_l2cap_main.c |
/*
* ng_l2cap_main.c
*/
/*-
* Copyright (c) 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_l2cap_main.c,v 1.2 2003/04/28 21:44:59 max Exp $
* $FreeBSD: release/9.1.0/sys/netgraph/bluetooth/l2cap/ng_l2cap_main.c 220768 2011-04-18 09:12:27Z glebius $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_parse.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/l2cap/ng_l2cap_var.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_cmds.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_evnt.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_llpi.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_ulpi.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_misc.h>
#include <netgraph/bluetooth/l2cap/ng_l2cap_prse.h>
/******************************************************************************
******************************************************************************
** This node implements Link Layer Control and Adaptation Protocol (L2CAP)
******************************************************************************
******************************************************************************/
/* MALLOC define */
#ifdef NG_SEPARATE_MALLOC
MALLOC_DEFINE(M_NETGRAPH_L2CAP, "netgraph_l2cap",
"Netgraph Bluetooth L2CAP node");
#else
#define M_NETGRAPH_L2CAP M_NETGRAPH
#endif /* NG_SEPARATE_MALLOC */
/* Netgraph node methods */
static ng_constructor_t ng_l2cap_constructor;
static ng_shutdown_t ng_l2cap_shutdown;
static ng_newhook_t ng_l2cap_newhook;
static ng_connect_t ng_l2cap_connect;
static ng_disconnect_t ng_l2cap_disconnect;
static ng_rcvmsg_t ng_l2cap_lower_rcvmsg;
static ng_rcvmsg_t ng_l2cap_upper_rcvmsg;
static ng_rcvmsg_t ng_l2cap_default_rcvmsg;
static ng_rcvdata_t ng_l2cap_rcvdata;
/* Netgraph node type descriptor */
static struct ng_type typestruct = {
.version = NG_ABI_VERSION,
.name = NG_L2CAP_NODE_TYPE,
.constructor = ng_l2cap_constructor,
.rcvmsg = ng_l2cap_default_rcvmsg,
.shutdown = ng_l2cap_shutdown,
.newhook = ng_l2cap_newhook,
.connect = ng_l2cap_connect,
.rcvdata = ng_l2cap_rcvdata,
.disconnect = ng_l2cap_disconnect,
.cmdlist = ng_l2cap_cmdlist,
};
NETGRAPH_INIT(l2cap, &typestruct);
MODULE_VERSION(ng_l2cap, NG_BLUETOOTH_VERSION);
MODULE_DEPEND(ng_l2cap, ng_bluetooth, NG_BLUETOOTH_VERSION,
NG_BLUETOOTH_VERSION, NG_BLUETOOTH_VERSION);
/*****************************************************************************
*****************************************************************************
** Netgraph methods implementation
*****************************************************************************
*****************************************************************************/
static void ng_l2cap_cleanup (ng_l2cap_p);
static void ng_l2cap_destroy_channels (ng_l2cap_p);
/*
* Create new instance of L2CAP node
*/
static int
ng_l2cap_constructor(node_p node)
{
ng_l2cap_p l2cap = NULL;
/* Create new L2CAP node */
l2cap = malloc(sizeof(*l2cap), M_NETGRAPH_L2CAP, M_WAITOK | M_ZERO);
l2cap->node = node;
l2cap->debug = NG_L2CAP_WARN_LEVEL;
l2cap->discon_timo = 5; /* sec */
LIST_INIT(&l2cap->con_list);
LIST_INIT(&l2cap->chan_list);
NG_NODE_SET_PRIVATE(node, l2cap);
NG_NODE_FORCE_WRITER(node);
return (0);
} /* ng_l2cap_constructor */
/*
* Shutdown L2CAP node
*/
static int
ng_l2cap_shutdown(node_p node)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
NG_NODE_SET_PRIVATE(node, NULL);
NG_NODE_UNREF(node);
/* Clean up L2CAP node. Delete all connection, channels and commands */
l2cap->node = NULL;
ng_l2cap_cleanup(l2cap);
bzero(l2cap, sizeof(*l2cap));
free(l2cap, M_NETGRAPH_L2CAP);
return (0);
} /* ng_l2cap_shutdown */
/*
* Give our OK for a hook to be added. HCI layer is connected to the HCI
* (NG_L2CAP_HOOK_HCI) hook. As per specification L2CAP layer MUST provide
* Procol/Service Multiplexing, so the L2CAP node provides separate hooks
* for SDP (NG_L2CAP_HOOK_SDP), RFCOMM (NG_L2CAP_HOOK_RFCOMM) and TCP
* (NG_L2CAP_HOOK_TCP) protcols. Unknown PSM will be forwarded to
* NG_L2CAP_HOOK_ORPHAN hook. Control node/application is connected to
* control (NG_L2CAP_HOOK_CTL) hook.
*/
static int
ng_l2cap_newhook(node_p node, hook_p hook, char const *name)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
hook_p *h = NULL;
if (strcmp(name, NG_L2CAP_HOOK_HCI) == 0)
h = &l2cap->hci;
else if (strcmp(name, NG_L2CAP_HOOK_L2C) == 0)
h = &l2cap->l2c;
else if (strcmp(name, NG_L2CAP_HOOK_CTL) == 0)
h = &l2cap->ctl;
else
return (EINVAL);
if (*h != NULL)
return (EISCONN);
*h = hook;
return (0);
} /* ng_l2cap_newhook */
/*
* Give our final OK to connect hook. Nothing to do here.
*/
static int
ng_l2cap_connect(hook_p hook)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
int error = 0;
if (hook == l2cap->hci)
NG_HOOK_SET_RCVMSG(hook, ng_l2cap_lower_rcvmsg);
else
if (hook == l2cap->l2c || hook == l2cap->ctl) {
NG_HOOK_SET_RCVMSG(hook, ng_l2cap_upper_rcvmsg);
/* Send delayed notification to the upper layer */
error = ng_send_fn(l2cap->node, hook, ng_l2cap_send_hook_info,
NULL, 0);
} else
error = EINVAL;
return (error);
} /* ng_l2cap_connect */
/*
* Disconnect the hook. For downstream hook we must notify upper layers.
*
* XXX For upstream hooks this is really ugly :( Hook was disconnected and it
* XXX is now too late to do anything. For now we just clean up our own mess
* XXX and remove all channels that use disconnected upstream hook. If we don't
* XXX do that then L2CAP node can get out of sync with upper layers.
* XXX No notification will be sent to remote peer.
*/
static int
ng_l2cap_disconnect(hook_p hook)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
hook_p *h = NULL;
if (hook == l2cap->hci) {
ng_l2cap_cleanup(l2cap);
h = &l2cap->hci;
} else
if (hook == l2cap->l2c) {
ng_l2cap_destroy_channels(l2cap);
h = &l2cap->l2c;
} else
if (hook == l2cap->ctl)
h = &l2cap->ctl;
else
return (EINVAL);
*h = NULL;
/* Shutdown when all hooks are disconnected */
if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 &&
NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))
ng_rmnode_self(NG_HOOK_NODE(hook));
return (0);
} /* ng_l2cap_disconnect */
/*
* Process control message from lower layer
*/
static int
ng_l2cap_lower_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
struct ng_mesg *msg = NGI_MSG(item); /* item still has message */
int error = 0;
switch (msg->header.typecookie) {
case NGM_HCI_COOKIE:
switch (msg->header.cmd) {
/* HCI node is ready */
case NGM_HCI_NODE_UP: {
ng_hci_node_up_ep *ep = NULL;
if (msg->header.arglen != sizeof(*ep))
error = EMSGSIZE;
else {
ep = (ng_hci_node_up_ep *)(msg->data);
NG_L2CAP_INFO(
"%s: %s - HCI node is up, bdaddr: %x:%x:%x:%x:%x:%x, " \
"pkt_size=%d bytes, num_pkts=%d\n", __func__, NG_NODE_NAME(l2cap->node),
ep->bdaddr.b[5], ep->bdaddr.b[4],
ep->bdaddr.b[3], ep->bdaddr.b[2],
ep->bdaddr.b[1], ep->bdaddr.b[0],
ep->pkt_size, ep->num_pkts);
bcopy(&ep->bdaddr, &l2cap->bdaddr,
sizeof(l2cap->bdaddr));
l2cap->pkt_size = ep->pkt_size;
l2cap->num_pkts = ep->num_pkts;
/* Notify upper layers */
ng_l2cap_send_hook_info(l2cap->node,
l2cap->l2c, NULL, 0);
ng_l2cap_send_hook_info(l2cap->node,
l2cap->ctl, NULL, 0);
}
} break;
case NGM_HCI_SYNC_CON_QUEUE: {
ng_hci_sync_con_queue_ep *ep = NULL;
ng_l2cap_con_p con = NULL;
if (msg->header.arglen != sizeof(*ep))
error = EMSGSIZE;
else {
ep = (ng_hci_sync_con_queue_ep *)(msg->data);
con = ng_l2cap_con_by_handle(l2cap,
ep->con_handle);
if (con == NULL)
break;
NG_L2CAP_INFO(
"%s: %s - sync HCI connection queue, con_handle=%d, pending=%d, completed=%d\n",
__func__, NG_NODE_NAME(l2cap->node),
ep->con_handle, con->pending,
ep->completed);
con->pending -= ep->completed;
if (con->pending < 0) {
NG_L2CAP_WARN(
"%s: %s - pending packet counter is out of sync! " \
"con_handle=%d, pending=%d, completed=%d\n", __func__,
NG_NODE_NAME(l2cap->node),
con->con_handle, con->pending,
ep->completed);
con->pending = 0;
}
ng_l2cap_lp_deliver(con);
}
} break;
/* LP_ConnectCfm[Neg] */
case NGM_HCI_LP_CON_CFM:
error = ng_l2cap_lp_con_cfm(l2cap, msg);
break;
/* LP_ConnectInd */
case NGM_HCI_LP_CON_IND:
error = ng_l2cap_lp_con_ind(l2cap, msg);
break;
/* LP_DisconnectInd */
case NGM_HCI_LP_DISCON_IND:
error = ng_l2cap_lp_discon_ind(l2cap, msg);
break;
/* LP_QoSSetupCfm[Neg] */
case NGM_HCI_LP_QOS_CFM:
error = ng_l2cap_lp_qos_cfm(l2cap, msg);
break;
/* LP_OoSViolationInd */
case NGM_HCI_LP_QOS_IND:
error = ng_l2cap_lp_qos_ind(l2cap, msg);
break;
default:
error = EINVAL;
break;
}
break;
default:
return (ng_l2cap_default_rcvmsg(node, item, lasthook));
/* NOT REACHED */
}
NG_FREE_ITEM(item);
return (error);
} /* ng_l2cap_lower_rcvmsg */
/*
* Process control message from upper layer
*/
static int
ng_l2cap_upper_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
struct ng_mesg *msg = NGI_MSG(item); /* item still has message */
int error = 0;
switch (msg->header.typecookie) {
case NGM_L2CAP_COOKIE:
switch (msg->header.cmd) {
/* L2CA_Connect */
case NGM_L2CAP_L2CA_CON:
error = ng_l2cap_l2ca_con_req(l2cap, msg);
break;
/* L2CA_ConnectRsp */
case NGM_L2CAP_L2CA_CON_RSP:
error = ng_l2cap_l2ca_con_rsp_req(l2cap, msg);
break;
/* L2CA_Config */
case NGM_L2CAP_L2CA_CFG:
error = ng_l2cap_l2ca_cfg_req(l2cap, msg);
break;
/* L2CA_ConfigRsp */
case NGM_L2CAP_L2CA_CFG_RSP:
error = ng_l2cap_l2ca_cfg_rsp_req(l2cap, msg);
break;
/* L2CA_Disconnect */
case NGM_L2CAP_L2CA_DISCON:
error = ng_l2cap_l2ca_discon_req(l2cap, msg);
break;
/* L2CA_GroupCreate */
case NGM_L2CAP_L2CA_GRP_CREATE:
error = ng_l2cap_l2ca_grp_create(l2cap, msg);
break;
/* L2CA_GroupClose */
case NGM_L2CAP_L2CA_GRP_CLOSE:
error = ng_l2cap_l2ca_grp_close(l2cap, msg);
break;
/* L2CA_GroupAddMember */
case NGM_L2CAP_L2CA_GRP_ADD_MEMBER:
error = ng_l2cap_l2ca_grp_add_member_req(l2cap, msg);
break;
/* L2CA_GroupDeleteMember */
case NGM_L2CAP_L2CA_GRP_REM_MEMBER:
error = ng_l2cap_l2ca_grp_rem_member(l2cap, msg);
break;
/* L2CA_GroupMembership */
case NGM_L2CAP_L2CA_GRP_MEMBERSHIP:
error = ng_l2cap_l2ca_grp_get_members(l2cap, msg);
break;
/* L2CA_Ping */
case NGM_L2CAP_L2CA_PING:
error = ng_l2cap_l2ca_ping_req(l2cap, msg);
break;
/* L2CA_GetInfo */
case NGM_L2CAP_L2CA_GET_INFO:
error = ng_l2cap_l2ca_get_info_req(l2cap, msg);
break;
/* L2CA_EnableCLT */
case NGM_L2CAP_L2CA_ENABLE_CLT:
error = ng_l2cap_l2ca_enable_clt(l2cap, msg);
break;
default:
return (ng_l2cap_default_rcvmsg(node, item, lasthook));
/* NOT REACHED */
}
break;
default:
return (ng_l2cap_default_rcvmsg(node, item, lasthook));
/* NOT REACHED */
}
NG_FREE_ITEM(item);
return (error);
} /* ng_l2cap_upper_rcvmsg */
/*
* Default control message processing routine
*/
static int
ng_l2cap_default_rcvmsg(node_p node, item_p item, hook_p lasthook)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(node);
struct ng_mesg *msg = NULL, *rsp = NULL;
int error = 0;
/* Detach and process message */
NGI_GET_MSG(item, msg);
switch (msg->header.typecookie) {
case NGM_GENERIC_COOKIE:
switch (msg->header.cmd) {
case NGM_TEXT_STATUS:
NG_MKRESPONSE(rsp, msg, NG_TEXTRESPONSE, M_NOWAIT);
if (rsp == NULL)
error = ENOMEM;
else
snprintf(rsp->data, NG_TEXTRESPONSE,
"bdaddr %x:%x:%x:%x:%x:%x, " \
"pkt_size %d\n" \
"Hooks %s %s %s\n" \
"Flags %#x\n",
l2cap->bdaddr.b[5], l2cap->bdaddr.b[4],
l2cap->bdaddr.b[3], l2cap->bdaddr.b[2],
l2cap->bdaddr.b[1], l2cap->bdaddr.b[0],
l2cap->pkt_size,
(l2cap->hci != NULL)?
NG_L2CAP_HOOK_HCI : "",
(l2cap->l2c != NULL)?
NG_L2CAP_HOOK_L2C : "",
(l2cap->ctl != NULL)?
NG_L2CAP_HOOK_CTL : "",
l2cap->flags);
break;
default:
error = EINVAL;
break;
}
break;
/* Messages from the upper layer or directed to the local node */
case NGM_L2CAP_COOKIE:
switch (msg->header.cmd) {
/* Get node flags */
case NGM_L2CAP_NODE_GET_FLAGS:
NG_MKRESPONSE(rsp, msg, sizeof(ng_l2cap_node_flags_ep),
M_NOWAIT);
if (rsp == NULL)
error = ENOMEM;
else
*((ng_l2cap_node_flags_ep *)(rsp->data)) =
l2cap->flags;
break;
/* Get node debug */
case NGM_L2CAP_NODE_GET_DEBUG:
NG_MKRESPONSE(rsp, msg, sizeof(ng_l2cap_node_debug_ep),
M_NOWAIT);
if (rsp == NULL)
error = ENOMEM;
else
*((ng_l2cap_node_debug_ep *)(rsp->data)) =
l2cap->debug;
break;
/* Set node debug */
case NGM_L2CAP_NODE_SET_DEBUG:
if (msg->header.arglen !=
sizeof(ng_l2cap_node_debug_ep))
error = EMSGSIZE;
else
l2cap->debug =
*((ng_l2cap_node_debug_ep *)(msg->data));
break;
/* Get connection list */
case NGM_L2CAP_NODE_GET_CON_LIST: {
ng_l2cap_con_p con = NULL;
ng_l2cap_node_con_list_ep *e1 = NULL;
ng_l2cap_node_con_ep *e2 = NULL;
int n = 0;
/* Count number of connections */
LIST_FOREACH(con, &l2cap->con_list, next)
n++;
if (n > NG_L2CAP_MAX_CON_NUM)
n = NG_L2CAP_MAX_CON_NUM;
/* Prepare response */
NG_MKRESPONSE(rsp, msg,
sizeof(*e1) + n * sizeof(*e2), M_NOWAIT);
if (rsp == NULL) {
error = ENOMEM;
break;
}
e1 = (ng_l2cap_node_con_list_ep *)(rsp->data);
e2 = (ng_l2cap_node_con_ep *)(e1 + 1);
e1->num_connections = n;
LIST_FOREACH(con, &l2cap->con_list, next) {
e2->state = con->state;
e2->flags = con->flags;
if (con->tx_pkt != NULL)
e2->flags |= NG_L2CAP_CON_TX;
if (con->rx_pkt != NULL)
e2->flags |= NG_L2CAP_CON_RX;
e2->pending = con->pending;
e2->con_handle = con->con_handle;
bcopy(&con->remote, &e2->remote,
sizeof(e2->remote));
e2 ++;
if (--n <= 0)
break;
}
} break;
/* Get channel list */
case NGM_L2CAP_NODE_GET_CHAN_LIST: {
ng_l2cap_chan_p ch = NULL;
ng_l2cap_node_chan_list_ep *e1 = NULL;
ng_l2cap_node_chan_ep *e2 = NULL;
int n = 0;
/* Count number of channels */
LIST_FOREACH(ch, &l2cap->chan_list, next)
n ++;
if (n > NG_L2CAP_MAX_CHAN_NUM)
n = NG_L2CAP_MAX_CHAN_NUM;
/* Prepare response */
NG_MKRESPONSE(rsp, msg,
sizeof(ng_l2cap_node_chan_list_ep) +
n * sizeof(ng_l2cap_node_chan_ep), M_NOWAIT);
if (rsp == NULL) {
error = ENOMEM;
break;
}
e1 = (ng_l2cap_node_chan_list_ep *)(rsp->data);
e2 = (ng_l2cap_node_chan_ep *)(e1 + 1);
e1->num_channels = n;
LIST_FOREACH(ch, &l2cap->chan_list, next) {
e2->state = ch->state;
e2->scid = ch->scid;
e2->dcid = ch->dcid;
e2->imtu = ch->imtu;
e2->omtu = ch->omtu;
e2->psm = ch->psm;
bcopy(&ch->con->remote, &e2->remote,
sizeof(e2->remote));
e2 ++;
if (--n <= 0)
break;
}
} break;
case NGM_L2CAP_NODE_GET_AUTO_DISCON_TIMO:
NG_MKRESPONSE(rsp, msg,
sizeof(ng_l2cap_node_auto_discon_ep), M_NOWAIT);
if (rsp == NULL)
error = ENOMEM;
else
*((ng_l2cap_node_auto_discon_ep *)(rsp->data)) =
l2cap->discon_timo;
break;
case NGM_L2CAP_NODE_SET_AUTO_DISCON_TIMO:
if (msg->header.arglen !=
sizeof(ng_l2cap_node_auto_discon_ep))
error = EMSGSIZE;
else
l2cap->discon_timo =
*((ng_l2cap_node_auto_discon_ep *)
(msg->data));
break;
default:
error = EINVAL;
break;
}
break;
default:
error = EINVAL;
break;
}
NG_RESPOND_MSG(error, node, item, rsp);
NG_FREE_MSG(msg);
return (error);
} /* ng_l2cap_rcvmsg */
/*
* Process data packet from one of our hooks.
*
* From the HCI hook we expect to receive ACL data packets. ACL data packets
* gets re-assembled into one L2CAP packet (according to length) and then gets
* processed.
*
* NOTE: We expect to receive L2CAP packet header in the first fragment.
* Otherwise we WILL NOT be able to get length of the L2CAP packet.
*
* Signaling L2CAP packets (destination channel ID == 0x1) are processed within
* the node. Connectionless data packets (destination channel ID == 0x2) will
* be forwarded to appropriate upstream hook unless it is not connected or
* connectionless traffic for the specified PSM was disabled.
*
* From the upstream hooks we expect to receive data packets. These data
* packets will be converted into L2CAP data packets. The length of each
* L2CAP packet must not exceed channel's omtu (our peer's imtu). Then
* these L2CAP packets will be converted to ACL data packets (according to
* HCI layer MTU) and sent to lower layer.
*
* No data is expected from the control hook.
*/
static int
ng_l2cap_rcvdata(hook_p hook, item_p item)
{
ng_l2cap_p l2cap = (ng_l2cap_p) NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
struct mbuf *m = NULL;
int error = 0;
/* Detach mbuf, discard item and process data */
NGI_GET_M(item, m);
NG_FREE_ITEM(item);
if (hook == l2cap->hci)
error = ng_l2cap_lp_receive(l2cap, m);
else if (hook == l2cap->l2c)
error = ng_l2cap_l2ca_write_req(l2cap, m);
else {
NG_FREE_M(m);
error = EINVAL;
}
return (error);
} /* ng_l2cap_rcvdata */
/*
* Clean all connections, channels and commands for the L2CAP node
*/
static void
ng_l2cap_cleanup(ng_l2cap_p l2cap)
{
ng_l2cap_con_p con = NULL;
/* Clean up connection and channels */
while (!LIST_EMPTY(&l2cap->con_list)) {
con = LIST_FIRST(&l2cap->con_list);
if (con->flags & NG_L2CAP_CON_LP_TIMO)
ng_l2cap_lp_untimeout(con);
else if (con->flags & NG_L2CAP_CON_AUTO_DISCON_TIMO)
ng_l2cap_discon_untimeout(con);
/* Connection terminated by local host */
ng_l2cap_con_fail(con, 0x16);
}
} /* ng_l2cap_cleanup */
/*
* Destroy all channels that use specified upstream hook
*/
static void
ng_l2cap_destroy_channels(ng_l2cap_p l2cap)
{
while (!LIST_EMPTY(&l2cap->chan_list))
ng_l2cap_free_chan(LIST_FIRST(&l2cap->chan_list));
} /* ng_l2cap_destroy_channels_by_hook */