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/*
* ng_hci_ulpi.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_hci_ulpi.c,v 1.7 2003/09/08 18:57:51 max Exp $
* $FreeBSD: release/9.1.0/sys/netgraph/bluetooth/hci/ng_hci_ulpi.c 139823 2005-01-07 01:45:51Z imp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/queue.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/hci/ng_hci_var.h>
#include <netgraph/bluetooth/hci/ng_hci_cmds.h>
#include <netgraph/bluetooth/hci/ng_hci_evnt.h>
#include <netgraph/bluetooth/hci/ng_hci_ulpi.h>
#include <netgraph/bluetooth/hci/ng_hci_misc.h>
/******************************************************************************
******************************************************************************
** Upper Layer Protocol Interface module
******************************************************************************
******************************************************************************/
static int ng_hci_lp_acl_con_req (ng_hci_unit_p, item_p, hook_p);
static int ng_hci_lp_sco_con_req (ng_hci_unit_p, item_p, hook_p);
/*
* Process LP_ConnectReq event from the upper layer protocol
*/
int
ng_hci_lp_con_req(ng_hci_unit_p unit, item_p item, hook_p hook)
{
if ((unit->state & NG_HCI_UNIT_READY) != NG_HCI_UNIT_READY) {
NG_HCI_WARN(
"%s: %s - unit is not ready, state=%#x\n",
__func__, NG_NODE_NAME(unit->node), unit->state);
NG_FREE_ITEM(item);
return (ENXIO);
}
if (NGI_MSG(item)->header.arglen != sizeof(ng_hci_lp_con_req_ep)) {
NG_HCI_ALERT(
"%s: %s - invalid LP_ConnectReq message size=%d\n",
__func__, NG_NODE_NAME(unit->node),
NGI_MSG(item)->header.arglen);
NG_FREE_ITEM(item);
return (EMSGSIZE);
}
if (((ng_hci_lp_con_req_ep *)(NGI_MSG(item)->data))->link_type == NG_HCI_LINK_ACL)
return (ng_hci_lp_acl_con_req(unit, item, hook));
if (hook != unit->sco) {
NG_HCI_WARN(
"%s: %s - LP_ConnectReq for SCO connection came from wrong hook=%p\n",
__func__, NG_NODE_NAME(unit->node), hook);
NG_FREE_ITEM(item);
return (EINVAL);
}
return (ng_hci_lp_sco_con_req(unit, item, hook));
} /* ng_hci_lp_con_req */
/*
* Request to create new ACL connection
*/
static int
ng_hci_lp_acl_con_req(ng_hci_unit_p unit, item_p item, hook_p hook)
{
struct acl_con_req {
ng_hci_cmd_pkt_t hdr;
ng_hci_create_con_cp cp;
} __attribute__ ((packed)) *req = NULL;
ng_hci_lp_con_req_ep *ep = NULL;
ng_hci_unit_con_p con = NULL;
ng_hci_neighbor_t *n = NULL;
struct mbuf *m = NULL;
int error = 0;
ep = (ng_hci_lp_con_req_ep *)(NGI_MSG(item)->data);
/*
* Only one ACL connection can exist between each pair of units.
* So try to find ACL connection descriptor (in any state) that
* has requested remote BD_ADDR.
*
* Two cases:
*
* 1) We do not have connection to the remote unit. This is simple.
* Just create new connection descriptor and send HCI command to
* create new connection.
*
* 2) We do have connection descriptor. We need to check connection
* state:
*
* 2.1) NG_HCI_CON_W4_LP_CON_RSP means that we are in the middle of
* accepting connection from the remote unit. This is a race
* condition. We will ignore this message.
*
* 2.2) NG_HCI_CON_W4_CONN_COMPLETE means that upper layer already
* requested connection or we just accepted it. In any case
* all we need to do here is set appropriate notification bit
* and wait.
*
* 2.3) NG_HCI_CON_OPEN means connection is open. Just reply back
* and let upper layer know that we have connection already.
*/
con = ng_hci_con_by_bdaddr(unit, &ep->bdaddr, NG_HCI_LINK_ACL);
if (con != NULL) {
switch (con->state) {
case NG_HCI_CON_W4_LP_CON_RSP: /* XXX */
error = EALREADY;
break;
case NG_HCI_CON_W4_CONN_COMPLETE:
if (hook == unit->acl)
con->flags |= NG_HCI_CON_NOTIFY_ACL;
else
con->flags |= NG_HCI_CON_NOTIFY_SCO;
break;
case NG_HCI_CON_OPEN: {
struct ng_mesg *msg = NULL;
ng_hci_lp_con_cfm_ep *cfm = NULL;
if (hook != NULL && NG_HOOK_IS_VALID(hook)) {
NGI_GET_MSG(item, msg);
NG_FREE_MSG(msg);
NG_MKMESSAGE(msg, NGM_HCI_COOKIE,
NGM_HCI_LP_CON_CFM, sizeof(*cfm),
M_NOWAIT);
if (msg != NULL) {
cfm = (ng_hci_lp_con_cfm_ep *)msg->data;
cfm->status = 0;
cfm->link_type = con->link_type;
cfm->con_handle = con->con_handle;
bcopy(&con->bdaddr, &cfm->bdaddr,
sizeof(cfm->bdaddr));
/*
* This will forward item back to
* sender and set item to NULL
*/
_NGI_MSG(item) = msg;
NG_FWD_ITEM_HOOK(error, item, hook);
} else
error = ENOMEM;
} else
NG_HCI_INFO(
"%s: %s - Source hook is not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node),
hook);
} break;
default:
panic(
"%s: %s - Invalid connection state=%d\n",
__func__, NG_NODE_NAME(unit->node), con->state);
break;
}
goto out;
}
/*
* If we got here then we need to create new ACL connection descriptor
* and submit HCI command. First create new connection desriptor, set
* bdaddr and notification flags.
*/
con = ng_hci_new_con(unit, NG_HCI_LINK_ACL);
if (con == NULL) {
error = ENOMEM;
goto out;
}
bcopy(&ep->bdaddr, &con->bdaddr, sizeof(con->bdaddr));
/*
* Create HCI command
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
ng_hci_free_con(con);
error = ENOBUFS;
goto out;
}
m->m_pkthdr.len = m->m_len = sizeof(*req);
req = mtod(m, struct acl_con_req *);
req->hdr.type = NG_HCI_CMD_PKT;
req->hdr.length = sizeof(req->cp);
req->hdr.opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
NG_HCI_OCF_CREATE_CON));
bcopy(&ep->bdaddr, &req->cp.bdaddr, sizeof(req->cp.bdaddr));
req->cp.pkt_type = (NG_HCI_PKT_DM1|NG_HCI_PKT_DH1);
if (unit->features[0] & NG_HCI_LMP_3SLOT)
req->cp.pkt_type |= (NG_HCI_PKT_DM3|NG_HCI_PKT_DH3);
if (unit->features[0] & NG_HCI_LMP_5SLOT)
req->cp.pkt_type |= (NG_HCI_PKT_DM5|NG_HCI_PKT_DH5);
req->cp.pkt_type &= unit->packet_mask;
if ((req->cp.pkt_type & (NG_HCI_PKT_DM1|NG_HCI_PKT_DH1|
NG_HCI_PKT_DM3|NG_HCI_PKT_DH3|
NG_HCI_PKT_DM5|NG_HCI_PKT_DH5)) == 0)
req->cp.pkt_type = (NG_HCI_PKT_DM1|NG_HCI_PKT_DH1);
req->cp.pkt_type = htole16(req->cp.pkt_type);
if ((unit->features[0] & NG_HCI_LMP_SWITCH) && unit->role_switch)
req->cp.accept_role_switch = 1;
else
req->cp.accept_role_switch = 0;
/*
* We may speed up connect by specifying valid parameters.
* So check the neighbor cache.
*/
n = ng_hci_get_neighbor(unit, &ep->bdaddr);
if (n == NULL) {
req->cp.page_scan_rep_mode = 0;
req->cp.page_scan_mode = 0;
req->cp.clock_offset = 0;
} else {
req->cp.page_scan_rep_mode = n->page_scan_rep_mode;
req->cp.page_scan_mode = n->page_scan_mode;
req->cp.clock_offset = htole16(n->clock_offset);
}
/*
* Adust connection state
*/
if (hook == unit->acl)
con->flags |= NG_HCI_CON_NOTIFY_ACL;
else
con->flags |= NG_HCI_CON_NOTIFY_SCO;
con->state = NG_HCI_CON_W4_CONN_COMPLETE;
ng_hci_con_timeout(con);
/*
* Queue and send HCI command
*/
NG_BT_MBUFQ_ENQUEUE(&unit->cmdq, m);
if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING))
error = ng_hci_send_command(unit);
out:
if (item != NULL)
NG_FREE_ITEM(item);
return (error);
} /* ng_hci_lp_acl_con_req */
/*
* Request to create new SCO connection
*/
static int
ng_hci_lp_sco_con_req(ng_hci_unit_p unit, item_p item, hook_p hook)
{
struct sco_con_req {
ng_hci_cmd_pkt_t hdr;
ng_hci_add_sco_con_cp cp;
} __attribute__ ((packed)) *req = NULL;
ng_hci_lp_con_req_ep *ep = NULL;
ng_hci_unit_con_p acl_con = NULL, sco_con = NULL;
struct mbuf *m = NULL;
int error = 0;
ep = (ng_hci_lp_con_req_ep *)(NGI_MSG(item)->data);
/*
* SCO connection without ACL link
*
* If upper layer requests SCO connection and there is no open ACL
* connection to the desired remote unit, we will reject the request.
*/
LIST_FOREACH(acl_con, &unit->con_list, next)
if (acl_con->link_type == NG_HCI_LINK_ACL &&
acl_con->state == NG_HCI_CON_OPEN &&
bcmp(&acl_con->bdaddr, &ep->bdaddr, sizeof(bdaddr_t)) == 0)
break;
if (acl_con == NULL) {
NG_HCI_INFO(
"%s: %s - No open ACL connection to bdaddr=%x:%x:%x:%x:%x:%x\n",
__func__, NG_NODE_NAME(unit->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]);
error = ENOENT;
goto out;
}
/*
* Multiple SCO connections can exist between the same pair of units.
* We assume that multiple SCO connections have to be opened one after
* another.
*
* Try to find SCO connection descriptor that matches the following:
*
* 1) sco_con->link_type == NG_HCI_LINK_SCO
*
* 2) sco_con->state == NG_HCI_CON_W4_LP_CON_RSP ||
* sco_con->state == NG_HCI_CON_W4_CONN_COMPLETE
*
* 3) sco_con->bdaddr == ep->bdaddr
*
* Two cases:
*
* 1) We do not have connection descriptor. This is simple. Just
* create new connection and submit Add_SCO_Connection command.
*
* 2) We do have connection descriptor. We need to check the state.
*
* 2.1) NG_HCI_CON_W4_LP_CON_RSP means we in the middle of accepting
* connection from the remote unit. This is a race condition and
* we will ignore the request.
*
* 2.2) NG_HCI_CON_W4_CONN_COMPLETE means upper layer already requested
* connection or we just accepted it.
*/
LIST_FOREACH(sco_con, &unit->con_list, next)
if (sco_con->link_type == NG_HCI_LINK_SCO &&
(sco_con->state == NG_HCI_CON_W4_LP_CON_RSP ||
sco_con->state == NG_HCI_CON_W4_CONN_COMPLETE) &&
bcmp(&sco_con->bdaddr, &ep->bdaddr, sizeof(bdaddr_t)) == 0)
break;
if (sco_con != NULL) {
switch (sco_con->state) {
case NG_HCI_CON_W4_LP_CON_RSP: /* XXX */
error = EALREADY;
break;
case NG_HCI_CON_W4_CONN_COMPLETE:
sco_con->flags |= NG_HCI_CON_NOTIFY_SCO;
break;
default:
panic(
"%s: %s - Inavalid connection state=%d\n",
__func__, NG_NODE_NAME(unit->node),
sco_con->state);
break;
}
goto out;
}
/*
* If we got here then we need to create new SCO connection descriptor
* and submit HCI command.
*/
sco_con = ng_hci_new_con(unit, NG_HCI_LINK_SCO);
if (sco_con == NULL) {
error = ENOMEM;
goto out;
}
bcopy(&ep->bdaddr, &sco_con->bdaddr, sizeof(sco_con->bdaddr));
/*
* Create HCI command
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
ng_hci_free_con(sco_con);
error = ENOBUFS;
goto out;
}
m->m_pkthdr.len = m->m_len = sizeof(*req);
req = mtod(m, struct sco_con_req *);
req->hdr.type = NG_HCI_CMD_PKT;
req->hdr.length = sizeof(req->cp);
req->hdr.opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
NG_HCI_OCF_ADD_SCO_CON));
req->cp.con_handle = htole16(acl_con->con_handle);
req->cp.pkt_type = NG_HCI_PKT_HV1;
if (unit->features[1] & NG_HCI_LMP_HV2_PKT)
req->cp.pkt_type |= NG_HCI_PKT_HV2;
if (unit->features[1] & NG_HCI_LMP_HV3_PKT)
req->cp.pkt_type |= NG_HCI_PKT_HV3;
req->cp.pkt_type &= unit->packet_mask;
if ((req->cp.pkt_type & (NG_HCI_PKT_HV1|
NG_HCI_PKT_HV2|
NG_HCI_PKT_HV3)) == 0)
req->cp.pkt_type = NG_HCI_PKT_HV1;
req->cp.pkt_type = htole16(req->cp.pkt_type);
/*
* Adust connection state
*/
sco_con->flags |= NG_HCI_CON_NOTIFY_SCO;
sco_con->state = NG_HCI_CON_W4_CONN_COMPLETE;
ng_hci_con_timeout(sco_con);
/*
* Queue and send HCI command
*/
NG_BT_MBUFQ_ENQUEUE(&unit->cmdq, m);
if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING))
error = ng_hci_send_command(unit);
out:
NG_FREE_ITEM(item);
return (error);
} /* ng_hci_lp_sco_con_req */
/*
* Process LP_DisconnectReq event from the upper layer protocol
*/
int
ng_hci_lp_discon_req(ng_hci_unit_p unit, item_p item, hook_p hook)
{
struct discon_req {
ng_hci_cmd_pkt_t hdr;
ng_hci_discon_cp cp;
} __attribute__ ((packed)) *req = NULL;
ng_hci_lp_discon_req_ep *ep = NULL;
ng_hci_unit_con_p con = NULL;
struct mbuf *m = NULL;
int error = 0;
/* Check if unit is ready */
if ((unit->state & NG_HCI_UNIT_READY) != NG_HCI_UNIT_READY) {
NG_HCI_WARN(
"%s: %s - unit is not ready, state=%#x\n",
__func__, NG_NODE_NAME(unit->node), unit->state);
error = ENXIO;
goto out;
}
if (NGI_MSG(item)->header.arglen != sizeof(*ep)) {
NG_HCI_ALERT(
"%s: %s - invalid LP_DisconnectReq message size=%d\n",
__func__, NG_NODE_NAME(unit->node),
NGI_MSG(item)->header.arglen);
error = EMSGSIZE;
goto out;
}
ep = (ng_hci_lp_discon_req_ep *)(NGI_MSG(item)->data);
con = ng_hci_con_by_handle(unit, ep->con_handle);
if (con == NULL) {
NG_HCI_ERR(
"%s: %s - invalid connection handle=%d\n",
__func__, NG_NODE_NAME(unit->node), ep->con_handle);
error = ENOENT;
goto out;
}
if (con->state != NG_HCI_CON_OPEN) {
NG_HCI_ERR(
"%s: %s - invalid connection state=%d, handle=%d\n",
__func__, NG_NODE_NAME(unit->node), con->state,
ep->con_handle);
error = EINVAL;
goto out;
}
/*
* Create HCI command
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
error = ENOBUFS;
goto out;
}
m->m_pkthdr.len = m->m_len = sizeof(*req);
req = mtod(m, struct discon_req *);
req->hdr.type = NG_HCI_CMD_PKT;
req->hdr.length = sizeof(req->cp);
req->hdr.opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
NG_HCI_OCF_DISCON));
req->cp.con_handle = htole16(ep->con_handle);
req->cp.reason = ep->reason;
/*
* Queue and send HCI command
*/
NG_BT_MBUFQ_ENQUEUE(&unit->cmdq, m);
if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING))
error = ng_hci_send_command(unit);
out:
NG_FREE_ITEM(item);
return (error);
} /* ng_hci_lp_discon_req */
/*
* Send LP_ConnectCfm event to the upper layer protocol
*/
int
ng_hci_lp_con_cfm(ng_hci_unit_con_p con, int status)
{
ng_hci_unit_p unit = con->unit;
struct ng_mesg *msg = NULL;
ng_hci_lp_con_cfm_ep *ep = NULL;
int error;
/*
* Check who wants to be notified. For ACL links both ACL and SCO
* upstream hooks will be notified (if required). For SCO links
* only SCO upstream hook will receive notification
*/
if (con->link_type == NG_HCI_LINK_ACL &&
con->flags & NG_HCI_CON_NOTIFY_ACL) {
if (unit->acl != NULL && NG_HOOK_IS_VALID(unit->acl)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_CON_CFM,
sizeof(*ep), M_NOWAIT);
if (msg != NULL) {
ep = (ng_hci_lp_con_cfm_ep *) msg->data;
ep->status = status;
ep->link_type = con->link_type;
ep->con_handle = con->con_handle;
bcopy(&con->bdaddr, &ep->bdaddr,
sizeof(ep->bdaddr));
NG_SEND_MSG_HOOK(error, unit->node, msg,
unit->acl, 0);
}
} else
NG_HCI_INFO(
"%s: %s - ACL hook not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->acl);
con->flags &= ~NG_HCI_CON_NOTIFY_ACL;
}
if (con->flags & NG_HCI_CON_NOTIFY_SCO) {
if (unit->sco != NULL && NG_HOOK_IS_VALID(unit->sco)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_CON_CFM,
sizeof(*ep), M_NOWAIT);
if (msg != NULL) {
ep = (ng_hci_lp_con_cfm_ep *) msg->data;
ep->status = status;
ep->link_type = con->link_type;
ep->con_handle = con->con_handle;
bcopy(&con->bdaddr, &ep->bdaddr,
sizeof(ep->bdaddr));
NG_SEND_MSG_HOOK(error, unit->node, msg,
unit->sco, 0);
}
} else
NG_HCI_INFO(
"%s: %s - SCO hook not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->acl);
con->flags &= ~NG_HCI_CON_NOTIFY_SCO;
}
return (0);
} /* ng_hci_lp_con_cfm */
/*
* Send LP_ConnectInd event to the upper layer protocol
*/
int
ng_hci_lp_con_ind(ng_hci_unit_con_p con, u_int8_t *uclass)
{
ng_hci_unit_p unit = con->unit;
struct ng_mesg *msg = NULL;
ng_hci_lp_con_ind_ep *ep = NULL;
hook_p hook = NULL;
int error = 0;
/*
* Connection_Request event is generated for specific link type.
* Use link_type to select upstream hook.
*/
if (con->link_type == NG_HCI_LINK_ACL)
hook = unit->acl;
else
hook = unit->sco;
if (hook != NULL && NG_HOOK_IS_VALID(hook)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_CON_IND,
sizeof(*ep), M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ep = (ng_hci_lp_con_ind_ep *)(msg->data);
ep->link_type = con->link_type;
bcopy(uclass, ep->uclass, sizeof(ep->uclass));
bcopy(&con->bdaddr, &ep->bdaddr, sizeof(ep->bdaddr));
NG_SEND_MSG_HOOK(error, unit->node, msg, hook, 0);
} else {
NG_HCI_WARN(
"%s: %s - Upstream hook is not connected or not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), hook);
error = ENOTCONN;
}
return (error);
} /* ng_hci_lp_con_ind */
/*
* Process LP_ConnectRsp event from the upper layer protocol
*/
int
ng_hci_lp_con_rsp(ng_hci_unit_p unit, item_p item, hook_p hook)
{
struct con_rsp_req {
ng_hci_cmd_pkt_t hdr;
union {
ng_hci_accept_con_cp acc;
ng_hci_reject_con_cp rej;
} __attribute__ ((packed)) cp;
} __attribute__ ((packed)) *req = NULL;
ng_hci_lp_con_rsp_ep *ep = NULL;
ng_hci_unit_con_p con = NULL;
struct mbuf *m = NULL;
int error = 0;
/* Check if unit is ready */
if ((unit->state & NG_HCI_UNIT_READY) != NG_HCI_UNIT_READY) {
NG_HCI_WARN(
"%s: %s - unit is not ready, state=%#x\n",
__func__, NG_NODE_NAME(unit->node), unit->state);
error = ENXIO;
goto out;
}
if (NGI_MSG(item)->header.arglen != sizeof(*ep)) {
NG_HCI_ALERT(
"%s: %s - invalid LP_ConnectRsp message size=%d\n",
__func__, NG_NODE_NAME(unit->node),
NGI_MSG(item)->header.arglen);
error = EMSGSIZE;
goto out;
}
ep = (ng_hci_lp_con_rsp_ep *)(NGI_MSG(item)->data);
/*
* Here we have to deal with race. Upper layers might send conflicting
* requests. One might send Accept and other Reject. We will not try
* to solve all the problems, so first request will always win.
*
* Try to find connection that matches the following:
*
* 1) con->link_type == ep->link_type
*
* 2) con->state == NG_HCI_CON_W4_LP_CON_RSP ||
* con->state == NG_HCI_CON_W4_CONN_COMPLETE
*
* 3) con->bdaddr == ep->bdaddr
*
* Two cases:
*
* 1) We do not have connection descriptor. Could be bogus request or
* we have rejected connection already.
*
* 2) We do have connection descriptor. Then we need to check state:
*
* 2.1) NG_HCI_CON_W4_LP_CON_RSP means upper layer has requested
* connection and it is a first response from the upper layer.
* if "status == 0" (Accept) then we will send Accept_Connection
* command and change connection state to W4_CONN_COMPLETE, else
* send reject and delete connection.
*
* 2.2) NG_HCI_CON_W4_CONN_COMPLETE means that we already accepted
* connection. If "status == 0" we just need to link request
* and wait, else ignore Reject request.
*/
LIST_FOREACH(con, &unit->con_list, next)
if (con->link_type == ep->link_type &&
(con->state == NG_HCI_CON_W4_LP_CON_RSP ||
con->state == NG_HCI_CON_W4_CONN_COMPLETE) &&
bcmp(&con->bdaddr, &ep->bdaddr, sizeof(bdaddr_t)) == 0)
break;
if (con == NULL) {
/* Reject for non-existing connection is fine */
error = (ep->status == 0)? ENOENT : 0;
goto out;
}
/*
* Remove connection timeout and check connection state.
* Note: if ng_hci_con_untimeout() fails (returns non-zero value) then
* timeout already happened and event went into node's queue.
*/
if ((error = ng_hci_con_untimeout(con)) != 0)
goto out;
switch (con->state) {
case NG_HCI_CON_W4_LP_CON_RSP:
/*
* Create HCI command
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
error = ENOBUFS;
goto out;
}
req = mtod(m, struct con_rsp_req *);
req->hdr.type = NG_HCI_CMD_PKT;
if (ep->status == 0) {
req->hdr.length = sizeof(req->cp.acc);
req->hdr.opcode = htole16(NG_HCI_OPCODE(
NG_HCI_OGF_LINK_CONTROL,
NG_HCI_OCF_ACCEPT_CON));
bcopy(&ep->bdaddr, &req->cp.acc.bdaddr,
sizeof(req->cp.acc.bdaddr));
/*
* We are accepting connection, so if we support role
* switch and role switch was enabled then set role to
* NG_HCI_ROLE_MASTER and let LM peform role switch.
* Otherwise we remain slave. In this case LM WILL NOT
* perform role switch.
*/
if ((unit->features[0] & NG_HCI_LMP_SWITCH) &&
unit->role_switch)
req->cp.acc.role = NG_HCI_ROLE_MASTER;
else
req->cp.acc.role = NG_HCI_ROLE_SLAVE;
/*
* Adjust connection state
*/
if (hook == unit->acl)
con->flags |= NG_HCI_CON_NOTIFY_ACL;
else
con->flags |= NG_HCI_CON_NOTIFY_SCO;
con->state = NG_HCI_CON_W4_CONN_COMPLETE;
ng_hci_con_timeout(con);
} else {
req->hdr.length = sizeof(req->cp.rej);
req->hdr.opcode = htole16(NG_HCI_OPCODE(
NG_HCI_OGF_LINK_CONTROL,
NG_HCI_OCF_REJECT_CON));
bcopy(&ep->bdaddr, &req->cp.rej.bdaddr,
sizeof(req->cp.rej.bdaddr));
req->cp.rej.reason = ep->status;
/*
* Free connection descritor
* Item will be deleted just before return.
*/
ng_hci_free_con(con);
}
m->m_pkthdr.len = m->m_len = sizeof(req->hdr) + req->hdr.length;
/* Queue and send HCI command */
NG_BT_MBUFQ_ENQUEUE(&unit->cmdq, m);
if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING))
error = ng_hci_send_command(unit);
break;
case NG_HCI_CON_W4_CONN_COMPLETE:
if (ep->status == 0) {
if (hook == unit->acl)
con->flags |= NG_HCI_CON_NOTIFY_ACL;
else
con->flags |= NG_HCI_CON_NOTIFY_SCO;
} else
error = EPERM;
break;
default:
panic(
"%s: %s - Invalid connection state=%d\n",
__func__, NG_NODE_NAME(unit->node), con->state);
break;
}
out:
NG_FREE_ITEM(item);
return (error);
} /* ng_hci_lp_con_rsp */
/*
* Send LP_DisconnectInd to the upper layer protocol
*/
int
ng_hci_lp_discon_ind(ng_hci_unit_con_p con, int reason)
{
ng_hci_unit_p unit = con->unit;
struct ng_mesg *msg = NULL;
ng_hci_lp_discon_ind_ep *ep = NULL;
int error = 0;
/*
* Disconnect_Complete event is generated for specific connection
* handle. For ACL connection handles both ACL and SCO upstream
* hooks will receive notification. For SCO connection handles
* only SCO upstream hook will receive notification.
*/
if (con->link_type == NG_HCI_LINK_ACL) {
if (unit->acl != NULL && NG_HOOK_IS_VALID(unit->acl)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE,
NGM_HCI_LP_DISCON_IND, sizeof(*ep), M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ep = (ng_hci_lp_discon_ind_ep *) msg->data;
ep->reason = reason;
ep->link_type = con->link_type;
ep->con_handle = con->con_handle;
NG_SEND_MSG_HOOK(error,unit->node,msg,unit->acl,0);
} else
NG_HCI_INFO(
"%s: %s - ACL hook is not connected or not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->acl);
}
if (unit->sco != NULL && NG_HOOK_IS_VALID(unit->sco)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_DISCON_IND,
sizeof(*ep), M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ep = (ng_hci_lp_discon_ind_ep *) msg->data;
ep->reason = reason;
ep->link_type = con->link_type;
ep->con_handle = con->con_handle;
NG_SEND_MSG_HOOK(error, unit->node, msg, unit->sco, 0);
} else
NG_HCI_INFO(
"%s: %s - SCO hook is not connected or not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->sco);
return (0);
} /* ng_hci_lp_discon_ind */
/*
* Process LP_QoSReq action from the upper layer protocol
*/
int
ng_hci_lp_qos_req(ng_hci_unit_p unit, item_p item, hook_p hook)
{
struct qos_setup_req {
ng_hci_cmd_pkt_t hdr;
ng_hci_qos_setup_cp cp;
} __attribute__ ((packed)) *req = NULL;
ng_hci_lp_qos_req_ep *ep = NULL;
ng_hci_unit_con_p con = NULL;
struct mbuf *m = NULL;
int error = 0;
/* Check if unit is ready */
if ((unit->state & NG_HCI_UNIT_READY) != NG_HCI_UNIT_READY) {
NG_HCI_WARN(
"%s: %s - unit is not ready, state=%#x\n",
__func__, NG_NODE_NAME(unit->node), unit->state);
error = ENXIO;
goto out;
}
if (NGI_MSG(item)->header.arglen != sizeof(*ep)) {
NG_HCI_ALERT(
"%s: %s - invalid LP_QoSSetupReq message size=%d\n",
__func__, NG_NODE_NAME(unit->node),
NGI_MSG(item)->header.arglen);
error = EMSGSIZE;
goto out;
}
ep = (ng_hci_lp_qos_req_ep *)(NGI_MSG(item)->data);
con = ng_hci_con_by_handle(unit, ep->con_handle);
if (con == NULL) {
NG_HCI_ERR(
"%s: %s - invalid connection handle=%d\n",
__func__, NG_NODE_NAME(unit->node), ep->con_handle);
error = EINVAL;
goto out;
}
if (con->link_type != NG_HCI_LINK_ACL) {
NG_HCI_ERR("%s: %s - invalid link type=%d\n",
__func__, NG_NODE_NAME(unit->node), con->link_type);
error = EINVAL;
goto out;
}
if (con->state != NG_HCI_CON_OPEN) {
NG_HCI_ERR(
"%s: %s - invalid connection state=%d, handle=%d\n",
__func__, NG_NODE_NAME(unit->node), con->state,
con->con_handle);
error = EINVAL;
goto out;
}
/*
* Create HCI command
*/
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL) {
error = ENOBUFS;
goto out;
}
m->m_pkthdr.len = m->m_len = sizeof(*req);
req = mtod(m, struct qos_setup_req *);
req->hdr.type = NG_HCI_CMD_PKT;
req->hdr.length = sizeof(req->cp);
req->hdr.opcode = htole16(NG_HCI_OPCODE(NG_HCI_OGF_LINK_POLICY,
NG_HCI_OCF_QOS_SETUP));
req->cp.con_handle = htole16(ep->con_handle);
req->cp.flags = ep->flags;
req->cp.service_type = ep->service_type;
req->cp.token_rate = htole32(ep->token_rate);
req->cp.peak_bandwidth = htole32(ep->peak_bandwidth);
req->cp.latency = htole32(ep->latency);
req->cp.delay_variation = htole32(ep->delay_variation);
/*
* Adjust connection state
*/
if (hook == unit->acl)
con->flags |= NG_HCI_CON_NOTIFY_ACL;
else
con->flags |= NG_HCI_CON_NOTIFY_SCO;
/*
* Queue and send HCI command
*/
NG_BT_MBUFQ_ENQUEUE(&unit->cmdq, m);
if (!(unit->state & NG_HCI_UNIT_COMMAND_PENDING))
error = ng_hci_send_command(unit);
out:
NG_FREE_ITEM(item);
return (error);
} /* ng_hci_lp_qos_req */
/*
* Send LP_QoSCfm event to the upper layer protocol
*/
int
ng_hci_lp_qos_cfm(ng_hci_unit_con_p con, int status)
{
ng_hci_unit_p unit = con->unit;
struct ng_mesg *msg = NULL;
ng_hci_lp_qos_cfm_ep *ep = NULL;
int error;
if (con->flags & NG_HCI_CON_NOTIFY_ACL) {
if (unit->acl != NULL && NG_HOOK_IS_VALID(unit->acl)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_QOS_CFM,
sizeof(*ep), M_NOWAIT);
if (msg != NULL) {
ep = (ng_hci_lp_qos_cfm_ep *) msg->data;
ep->status = status;
ep->con_handle = con->con_handle;
NG_SEND_MSG_HOOK(error, unit->node, msg,
unit->acl, 0);
}
} else
NG_HCI_INFO(
"%s: %s - ACL hook not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->acl);
con->flags &= ~NG_HCI_CON_NOTIFY_ACL;
}
if (con->flags & NG_HCI_CON_NOTIFY_SCO) {
if (unit->sco != NULL && NG_HOOK_IS_VALID(unit->sco)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_QOS_CFM,
sizeof(*ep), M_NOWAIT);
if (msg != NULL) {
ep = (ng_hci_lp_qos_cfm_ep *) msg->data;
ep->status = status;
ep->con_handle = con->con_handle;
NG_SEND_MSG_HOOK(error, unit->node, msg,
unit->sco, 0);
}
} else
NG_HCI_INFO(
"%s: %s - SCO hook not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->sco);
con->flags &= ~NG_HCI_CON_NOTIFY_SCO;
}
return (0);
} /* ng_hci_lp_qos_cfm */
/*
* Send LP_QoSViolationInd event to the upper layer protocol
*/
int
ng_hci_lp_qos_ind(ng_hci_unit_con_p con)
{
ng_hci_unit_p unit = con->unit;
struct ng_mesg *msg = NULL;
ng_hci_lp_qos_ind_ep *ep = NULL;
int error;
/*
* QoS Violation can only be generated for ACL connection handles.
* Both ACL and SCO upstream hooks will receive notification.
*/
if (unit->acl != NULL && NG_HOOK_IS_VALID(unit->acl)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_QOS_IND,
sizeof(*ep), M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ep = (ng_hci_lp_qos_ind_ep *) msg->data;
ep->con_handle = con->con_handle;
NG_SEND_MSG_HOOK(error, unit->node, msg, unit->acl, 0);
} else
NG_HCI_INFO(
"%s: %s - ACL hook is not connected or not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->acl);
if (unit->sco != NULL && NG_HOOK_IS_VALID(unit->sco)) {
NG_MKMESSAGE(msg, NGM_HCI_COOKIE, NGM_HCI_LP_QOS_IND,
sizeof(*ep), M_NOWAIT);
if (msg == NULL)
return (ENOMEM);
ep = (ng_hci_lp_qos_ind_ep *) msg->data;
ep->con_handle = con->con_handle;
NG_SEND_MSG_HOOK(error, unit->node, msg, unit->sco, 0);
} else
NG_HCI_INFO(
"%s: %s - SCO hook is not connected or not valid, hook=%p\n",
__func__, NG_NODE_NAME(unit->node), unit->sco);
return (0);
} /* ng_hci_lp_qos_ind */
/*
* Process connection timeout
*/
void
ng_hci_process_con_timeout(node_p node, hook_p hook, void *arg1, int con_handle)
{
ng_hci_unit_p unit = NULL;
ng_hci_unit_con_p con = NULL;
if (NG_NODE_NOT_VALID(node)) {
printf("%s: Netgraph node is not valid\n", __func__);
return;
}
unit = (ng_hci_unit_p) NG_NODE_PRIVATE(node);
con = ng_hci_con_by_handle(unit, con_handle);
if (con == NULL) {
NG_HCI_ALERT(
"%s: %s - could not find connection, handle=%d\n",
__func__, NG_NODE_NAME(node), con_handle);
return;
}
if (!(con->flags & NG_HCI_CON_TIMEOUT_PENDING)) {
NG_HCI_ALERT(
"%s: %s - no pending connection timeout, handle=%d, state=%d, flags=%#x\n",
__func__, NG_NODE_NAME(node), con_handle, con->state,
con->flags);
return;
}
con->flags &= ~NG_HCI_CON_TIMEOUT_PENDING;
/*
* We expect to receive connection timeout in one of the following
* states:
*
* 1) NG_HCI_CON_W4_LP_CON_RSP means that upper layer has not responded
* to our LP_CON_IND. Do nothing and destroy connection. Remote peer
* most likely already gave up on us.
*
* 2) NG_HCI_CON_W4_CONN_COMPLETE means upper layer requested connection
* (or we in the process of accepting it) and baseband has timedout
* on us. Inform upper layers and send LP_CON_CFM.
*/
switch (con->state) {
case NG_HCI_CON_W4_LP_CON_RSP:
break;
case NG_HCI_CON_W4_CONN_COMPLETE:
ng_hci_lp_con_cfm(con, 0xee);
break;
default:
panic(
"%s: %s - Invalid connection state=%d\n",
__func__, NG_NODE_NAME(node), con->state);
break;
}
ng_hci_free_con(con);
} /* ng_hci_process_con_timeout */