NetBSD-5.0.2/sys/netbt/hci_event.c
/* $NetBSD: hci_event.c,v 1.18 2008/04/24 11:38:37 ad Exp $ */
/*-
* Copyright (c) 2005 Iain Hibbert.
* Copyright (c) 2006 Itronix Inc.
* 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.
* 3. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: hci_event.c,v 1.18 2008/04/24 11:38:37 ad Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <netbt/bluetooth.h>
#include <netbt/hci.h>
#include <netbt/sco.h>
static void hci_event_inquiry_result(struct hci_unit *, struct mbuf *);
static void hci_event_rssi_result(struct hci_unit *, struct mbuf *);
static void hci_event_command_status(struct hci_unit *, struct mbuf *);
static void hci_event_command_compl(struct hci_unit *, struct mbuf *);
static void hci_event_con_compl(struct hci_unit *, struct mbuf *);
static void hci_event_discon_compl(struct hci_unit *, struct mbuf *);
static void hci_event_con_req(struct hci_unit *, struct mbuf *);
static void hci_event_num_compl_pkts(struct hci_unit *, struct mbuf *);
static void hci_event_auth_compl(struct hci_unit *, struct mbuf *);
static void hci_event_encryption_change(struct hci_unit *, struct mbuf *);
static void hci_event_change_con_link_key_compl(struct hci_unit *, struct mbuf *);
static void hci_event_read_clock_offset_compl(struct hci_unit *, struct mbuf *);
static void hci_cmd_read_bdaddr(struct hci_unit *, struct mbuf *);
static void hci_cmd_read_buffer_size(struct hci_unit *, struct mbuf *);
static void hci_cmd_read_local_features(struct hci_unit *, struct mbuf *);
static void hci_cmd_read_local_ver(struct hci_unit *, struct mbuf *);
static void hci_cmd_read_local_commands(struct hci_unit *, struct mbuf *);
static void hci_cmd_reset(struct hci_unit *, struct mbuf *);
static void hci_cmd_create_con(struct hci_unit *unit, uint8_t status);
#ifdef BLUETOOTH_DEBUG
int bluetooth_debug;
static const char *hci_eventnames[] = {
/* 0x00 */ "NULL",
/* 0x01 */ "INQUIRY COMPLETE",
/* 0x02 */ "INQUIRY RESULT",
/* 0x03 */ "CONN COMPLETE",
/* 0x04 */ "CONN REQ",
/* 0x05 */ "DISCONN COMPLETE",
/* 0x06 */ "AUTH COMPLETE",
/* 0x07 */ "REMOTE NAME REQ COMPLETE",
/* 0x08 */ "ENCRYPTION CHANGE",
/* 0x09 */ "CHANGE CONN LINK KEY COMPLETE",
/* 0x0a */ "MASTER LINK KEY COMPLETE",
/* 0x0b */ "READ REMOTE FEATURES COMPLETE",
/* 0x0c */ "READ REMOTE VERSION INFO COMPLETE",
/* 0x0d */ "QoS SETUP COMPLETE",
/* 0x0e */ "COMMAND COMPLETE",
/* 0x0f */ "COMMAND STATUS",
/* 0x10 */ "HARDWARE ERROR",
/* 0x11 */ "FLUSH OCCUR",
/* 0x12 */ "ROLE CHANGE",
/* 0x13 */ "NUM COMPLETED PACKETS",
/* 0x14 */ "MODE CHANGE",
/* 0x15 */ "RETURN LINK KEYS",
/* 0x16 */ "PIN CODE REQ",
/* 0x17 */ "LINK KEY REQ",
/* 0x18 */ "LINK KEY NOTIFICATION",
/* 0x19 */ "LOOPBACK COMMAND",
/* 0x1a */ "DATA BUFFER OVERFLOW",
/* 0x1b */ "MAX SLOT CHANGE",
/* 0x1c */ "READ CLOCK OFFSET COMPLETE",
/* 0x1d */ "CONN PKT TYPE CHANGED",
/* 0x1e */ "QOS VIOLATION",
/* 0x1f */ "PAGE SCAN MODE CHANGE",
/* 0x20 */ "PAGE SCAN REP MODE CHANGE",
/* 0x21 */ "FLOW SPECIFICATION COMPLETE",
/* 0x22 */ "RSSI RESULT",
/* 0x23 */ "READ REMOTE EXT FEATURES",
/* 0x24 */ "UNKNOWN",
/* 0x25 */ "UNKNOWN",
/* 0x26 */ "UNKNOWN",
/* 0x27 */ "UNKNOWN",
/* 0x28 */ "UNKNOWN",
/* 0x29 */ "UNKNOWN",
/* 0x2a */ "UNKNOWN",
/* 0x2b */ "UNKNOWN",
/* 0x2c */ "SCO CON COMPLETE",
/* 0x2d */ "SCO CON CHANGED",
/* 0x2e */ "SNIFF SUBRATING",
/* 0x2f */ "EXTENDED INQUIRY RESULT",
/* 0x30 */ "ENCRYPTION KEY REFRESH",
/* 0x31 */ "IO CAPABILITY REQUEST",
/* 0x32 */ "IO CAPABILITY RESPONSE",
/* 0x33 */ "USER CONFIRM REQUEST",
/* 0x34 */ "USER PASSKEY REQUEST",
/* 0x35 */ "REMOTE OOB DATA REQUEST",
/* 0x36 */ "SIMPLE PAIRING COMPLETE",
/* 0x37 */ "UNKNOWN",
/* 0x38 */ "LINK SUPERVISION TIMEOUT CHANGED",
/* 0x39 */ "ENHANCED FLUSH COMPLETE",
/* 0x3a */ "UNKNOWN",
/* 0x3b */ "USER PASSKEY NOTIFICATION",
/* 0x3c */ "KEYPRESS NOTIFICATION",
/* 0x3d */ "REMOTE HOST FEATURES NOTIFICATION",
};
static const char *
hci_eventstr(unsigned int event)
{
if (event < __arraycount(hci_eventnames))
return hci_eventnames[event];
switch (event) {
case HCI_EVENT_BT_LOGO: /* 0xfe */
return "BT_LOGO";
case HCI_EVENT_VENDOR: /* 0xff */
return "VENDOR";
}
return "UNKNOWN";
}
#endif /* BLUETOOTH_DEBUG */
/*
* process HCI Events
*
* We will free the mbuf at the end, no need for any sub
* functions to handle that. We kind of assume that the
* device sends us valid events.
*/
void
hci_event(struct mbuf *m, struct hci_unit *unit)
{
hci_event_hdr_t hdr;
KASSERT(m->m_flags & M_PKTHDR);
KASSERT(m->m_pkthdr.len >= sizeof(hdr));
m_copydata(m, 0, sizeof(hdr), &hdr);
m_adj(m, sizeof(hdr));
KASSERT(hdr.type == HCI_EVENT_PKT);
DPRINTFN(1, "(%s) event %s\n",
device_xname(unit->hci_dev), hci_eventstr(hdr.event));
switch(hdr.event) {
case HCI_EVENT_COMMAND_STATUS:
hci_event_command_status(unit, m);
break;
case HCI_EVENT_COMMAND_COMPL:
hci_event_command_compl(unit, m);
break;
case HCI_EVENT_NUM_COMPL_PKTS:
hci_event_num_compl_pkts(unit, m);
break;
case HCI_EVENT_INQUIRY_RESULT:
hci_event_inquiry_result(unit, m);
break;
case HCI_EVENT_RSSI_RESULT:
hci_event_rssi_result(unit, m);
break;
case HCI_EVENT_CON_COMPL:
hci_event_con_compl(unit, m);
break;
case HCI_EVENT_DISCON_COMPL:
hci_event_discon_compl(unit, m);
break;
case HCI_EVENT_CON_REQ:
hci_event_con_req(unit, m);
break;
case HCI_EVENT_AUTH_COMPL:
hci_event_auth_compl(unit, m);
break;
case HCI_EVENT_ENCRYPTION_CHANGE:
hci_event_encryption_change(unit, m);
break;
case HCI_EVENT_CHANGE_CON_LINK_KEY_COMPL:
hci_event_change_con_link_key_compl(unit, m);
break;
case HCI_EVENT_READ_CLOCK_OFFSET_COMPL:
hci_event_read_clock_offset_compl(unit, m);
break;
default:
break;
}
m_freem(m);
}
/*
* Command Status
*
* Restart command queue and post-process any pending commands
*/
static void
hci_event_command_status(struct hci_unit *unit, struct mbuf *m)
{
hci_command_status_ep ep;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
ep.opcode = le16toh(ep.opcode);
DPRINTFN(1, "(%s) opcode (%03x|%04x) status = 0x%x num_cmd_pkts = %d\n",
device_xname(unit->hci_dev),
HCI_OGF(ep.opcode), HCI_OCF(ep.opcode),
ep.status,
ep.num_cmd_pkts);
hci_num_cmds(unit, ep.num_cmd_pkts);
/*
* post processing of pending commands
*/
switch(ep.opcode) {
case HCI_CMD_CREATE_CON:
hci_cmd_create_con(unit, ep.status);
break;
default:
if (ep.status == 0)
break;
aprint_error_dev(unit->hci_dev,
"CommandStatus opcode (%03x|%04x) failed (status=0x%02x)\n",
HCI_OGF(ep.opcode), HCI_OCF(ep.opcode),
ep.status);
break;
}
}
/*
* Command Complete
*
* Restart command queue and handle the completed command
*/
static void
hci_event_command_compl(struct hci_unit *unit, struct mbuf *m)
{
hci_command_compl_ep ep;
hci_status_rp rp;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
DPRINTFN(1, "(%s) opcode (%03x|%04x) num_cmd_pkts = %d\n",
device_xname(unit->hci_dev),
HCI_OGF(le16toh(ep.opcode)), HCI_OCF(le16toh(ep.opcode)),
ep.num_cmd_pkts);
hci_num_cmds(unit, ep.num_cmd_pkts);
/*
* I am not sure if this is completely correct, it is not guaranteed
* that a command_complete packet will contain the status though most
* do seem to.
*/
m_copydata(m, 0, sizeof(rp), &rp);
if (rp.status > 0)
aprint_error_dev(unit->hci_dev,
"CommandComplete opcode (%03x|%04x) failed (status=0x%02x)\n",
HCI_OGF(le16toh(ep.opcode)), HCI_OCF(le16toh(ep.opcode)),
rp.status);
/*
* post processing of completed commands
*/
switch(le16toh(ep.opcode)) {
case HCI_CMD_READ_BDADDR:
hci_cmd_read_bdaddr(unit, m);
break;
case HCI_CMD_READ_BUFFER_SIZE:
hci_cmd_read_buffer_size(unit, m);
break;
case HCI_CMD_READ_LOCAL_FEATURES:
hci_cmd_read_local_features(unit, m);
break;
case HCI_CMD_READ_LOCAL_VER:
hci_cmd_read_local_ver(unit, m);
break;
case HCI_CMD_READ_LOCAL_COMMANDS:
hci_cmd_read_local_commands(unit, m);
break;
case HCI_CMD_RESET:
hci_cmd_reset(unit, m);
break;
default:
break;
}
}
/*
* Number of Completed Packets
*
* This is sent periodically by the Controller telling us how many
* buffers are now freed up and which handle was using them. From
* this we determine which type of buffer it was and add the qty
* back into the relevant packet counter, then restart output on
* links that have halted.
*/
static void
hci_event_num_compl_pkts(struct hci_unit *unit, struct mbuf *m)
{
hci_num_compl_pkts_ep ep;
struct hci_link *link, *next;
uint16_t handle, num;
int num_acl = 0, num_sco = 0;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
while (ep.num_con_handles--) {
m_copydata(m, 0, sizeof(handle), &handle);
m_adj(m, sizeof(handle));
handle = le16toh(handle);
m_copydata(m, 0, sizeof(num), &num);
m_adj(m, sizeof(num));
num = le16toh(num);
link = hci_link_lookup_handle(unit, handle);
if (link) {
if (link->hl_type == HCI_LINK_ACL) {
num_acl += num;
hci_acl_complete(link, num);
} else {
num_sco += num;
hci_sco_complete(link, num);
}
} else {
/* XXX need to issue Read_Buffer_Size or Reset? */
aprint_error_dev(unit->hci_dev,
"unknown handle %d! (losing track of %d packet buffer%s)\n",
handle, num, (num == 1 ? "" : "s"));
}
}
/*
* Move up any queued packets. When a link has sent data, it will move
* to the back of the queue - technically then if a link had something
* to send and there were still buffers available it could get started
* twice but it seemed more important to to handle higher loads fairly
* than worry about wasting cycles when we are not busy.
*/
unit->hci_num_acl_pkts += num_acl;
unit->hci_num_sco_pkts += num_sco;
link = TAILQ_FIRST(&unit->hci_links);
while (link && (unit->hci_num_acl_pkts > 0 || unit->hci_num_sco_pkts > 0)) {
next = TAILQ_NEXT(link, hl_next);
if (link->hl_type == HCI_LINK_ACL) {
if (unit->hci_num_acl_pkts > 0 && link->hl_txqlen > 0)
hci_acl_start(link);
} else {
if (unit->hci_num_sco_pkts > 0 && link->hl_txqlen > 0)
hci_sco_start(link);
}
link = next;
}
}
/*
* Inquiry Result
*
* keep a note of devices seen, so we know which unit to use
* on outgoing connections
*/
static void
hci_event_inquiry_result(struct hci_unit *unit, struct mbuf *m)
{
hci_inquiry_result_ep ep;
hci_inquiry_response ir;
struct hci_memo *memo;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
DPRINTFN(1, "%d response%s\n", ep.num_responses,
(ep.num_responses == 1 ? "" : "s"));
while(ep.num_responses--) {
KASSERT(m->m_pkthdr.len >= sizeof(ir));
m_copydata(m, 0, sizeof(ir), &ir);
m_adj(m, sizeof(ir));
DPRINTFN(1, "bdaddr %02x:%02x:%02x:%02x:%02x:%02x\n",
ir.bdaddr.b[5], ir.bdaddr.b[4], ir.bdaddr.b[3],
ir.bdaddr.b[2], ir.bdaddr.b[1], ir.bdaddr.b[0]);
memo = hci_memo_new(unit, &ir.bdaddr);
if (memo != NULL) {
memo->page_scan_rep_mode = ir.page_scan_rep_mode;
memo->page_scan_mode = ir.page_scan_mode;
memo->clock_offset = ir.clock_offset;
}
}
}
/*
* Inquiry Result with RSSI
*
* as above but different packet when RSSI result is enabled
*/
static void
hci_event_rssi_result(struct hci_unit *unit, struct mbuf *m)
{
hci_rssi_result_ep ep;
hci_rssi_response rr;
struct hci_memo *memo;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
DPRINTFN(1, "%d response%s\n", ep.num_responses,
(ep.num_responses == 1 ? "" : "s"));
while(ep.num_responses--) {
KASSERT(m->m_pkthdr.len >= sizeof(rr));
m_copydata(m, 0, sizeof(rr), &rr);
m_adj(m, sizeof(rr));
DPRINTFN(1, "bdaddr %02x:%02x:%02x:%02x:%02x:%02x\n",
rr.bdaddr.b[5], rr.bdaddr.b[4], rr.bdaddr.b[3],
rr.bdaddr.b[2], rr.bdaddr.b[1], rr.bdaddr.b[0]);
memo = hci_memo_new(unit, &rr.bdaddr);
if (memo != NULL) {
memo->page_scan_rep_mode = rr.page_scan_rep_mode;
memo->page_scan_mode = 0;
memo->clock_offset = rr.clock_offset;
}
}
}
/*
* Connection Complete
*
* Sent to us when a connection is made. If there is no link
* structure already allocated for this, we must have changed
* our mind, so just disconnect.
*/
static void
hci_event_con_compl(struct hci_unit *unit, struct mbuf *m)
{
hci_con_compl_ep ep;
hci_write_link_policy_settings_cp cp;
struct hci_link *link;
int err;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
DPRINTFN(1, "(%s) %s connection complete for "
"%02x:%02x:%02x:%02x:%02x:%02x status %#x\n",
device_xname(unit->hci_dev),
(ep.link_type == HCI_LINK_ACL ? "ACL" : "SCO"),
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.status);
link = hci_link_lookup_bdaddr(unit, &ep.bdaddr, ep.link_type);
if (ep.status) {
if (link != NULL) {
switch (ep.status) {
case 0x04: /* "Page Timeout" */
err = EHOSTDOWN;
break;
case 0x08: /* "Connection Timed Out" */
err = ETIMEDOUT;
break;
case 0x16: /* "Connection Terminated by Local Host" */
err = 0;
break;
default:
err = ECONNREFUSED;
break;
}
hci_link_free(link, err);
}
return;
}
if (link == NULL) {
hci_discon_cp dp;
dp.con_handle = ep.con_handle;
dp.reason = 0x13; /* "Remote User Terminated Connection" */
hci_send_cmd(unit, HCI_CMD_DISCONNECT, &dp, sizeof(dp));
return;
}
/* XXX could check auth_enable here */
if (ep.encryption_mode)
link->hl_flags |= (HCI_LINK_AUTH | HCI_LINK_ENCRYPT);
link->hl_state = HCI_LINK_OPEN;
link->hl_handle = HCI_CON_HANDLE(le16toh(ep.con_handle));
if (ep.link_type == HCI_LINK_ACL) {
cp.con_handle = ep.con_handle;
cp.settings = htole16(unit->hci_link_policy);
err = hci_send_cmd(unit, HCI_CMD_WRITE_LINK_POLICY_SETTINGS,
&cp, sizeof(cp));
if (err)
aprint_error_dev(unit->hci_dev,
"Warning, could not write link policy\n");
err = hci_send_cmd(unit, HCI_CMD_READ_CLOCK_OFFSET,
&cp.con_handle, sizeof(cp.con_handle));
if (err)
aprint_error_dev(unit->hci_dev,
"Warning, could not read clock offset\n");
err = hci_acl_setmode(link);
if (err == EINPROGRESS)
return;
hci_acl_linkmode(link);
} else {
(*link->hl_sco->sp_proto->connected)(link->hl_sco->sp_upper);
}
}
/*
* Disconnection Complete
*
* This is sent in response to a disconnection request, but also if
* the remote device goes out of range.
*/
static void
hci_event_discon_compl(struct hci_unit *unit, struct mbuf *m)
{
hci_discon_compl_ep ep;
struct hci_link *link;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
ep.con_handle = le16toh(ep.con_handle);
DPRINTFN(1, "handle #%d, status=0x%x\n", ep.con_handle, ep.status);
link = hci_link_lookup_handle(unit, HCI_CON_HANDLE(ep.con_handle));
if (link)
hci_link_free(link, ENOLINK);
}
/*
* Connect Request
*
* We check upstream for appropriate listeners and accept connections
* that are wanted.
*/
static void
hci_event_con_req(struct hci_unit *unit, struct mbuf *m)
{
hci_con_req_ep ep;
hci_accept_con_cp ap;
hci_reject_con_cp rp;
struct hci_link *link;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
DPRINTFN(1, "bdaddr %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
"class %2.2x%2.2x%2.2x type %s\n",
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.uclass[0], ep.uclass[1], ep.uclass[2],
ep.link_type == HCI_LINK_ACL ? "ACL" : "SCO");
if (ep.link_type == HCI_LINK_ACL)
link = hci_acl_newconn(unit, &ep.bdaddr);
else
link = hci_sco_newconn(unit, &ep.bdaddr);
if (link == NULL) {
memset(&rp, 0, sizeof(rp));
bdaddr_copy(&rp.bdaddr, &ep.bdaddr);
rp.reason = 0x0f; /* Unacceptable BD_ADDR */
hci_send_cmd(unit, HCI_CMD_REJECT_CON, &rp, sizeof(rp));
} else {
memset(&ap, 0, sizeof(ap));
bdaddr_copy(&ap.bdaddr, &ep.bdaddr);
if (unit->hci_link_policy & HCI_LINK_POLICY_ENABLE_ROLE_SWITCH)
ap.role = HCI_ROLE_MASTER;
else
ap.role = HCI_ROLE_SLAVE;
hci_send_cmd(unit, HCI_CMD_ACCEPT_CON, &ap, sizeof(ap));
}
}
/*
* Auth Complete
*
* Authentication has been completed on an ACL link. We can notify the
* upper layer protocols unless further mode changes are pending.
*/
static void
hci_event_auth_compl(struct hci_unit *unit, struct mbuf *m)
{
hci_auth_compl_ep ep;
struct hci_link *link;
int err;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
ep.con_handle = HCI_CON_HANDLE(le16toh(ep.con_handle));
DPRINTFN(1, "handle #%d, status=0x%x\n", ep.con_handle, ep.status);
link = hci_link_lookup_handle(unit, ep.con_handle);
if (link == NULL || link->hl_type != HCI_LINK_ACL)
return;
if (ep.status == 0) {
link->hl_flags |= HCI_LINK_AUTH;
if (link->hl_state == HCI_LINK_WAIT_AUTH)
link->hl_state = HCI_LINK_OPEN;
err = hci_acl_setmode(link);
if (err == EINPROGRESS)
return;
}
hci_acl_linkmode(link);
}
/*
* Encryption Change
*
* The encryption status has changed. Basically, we note the change
* then notify the upper layer protocol unless further mode changes
* are pending.
* Note that if encryption gets disabled when it has been requested,
* we will attempt to enable it again.. (its a feature not a bug :)
*/
static void
hci_event_encryption_change(struct hci_unit *unit, struct mbuf *m)
{
hci_encryption_change_ep ep;
struct hci_link *link;
int err;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
ep.con_handle = HCI_CON_HANDLE(le16toh(ep.con_handle));
DPRINTFN(1, "handle #%d, status=0x%x, encryption_enable=0x%x\n",
ep.con_handle, ep.status, ep.encryption_enable);
link = hci_link_lookup_handle(unit, ep.con_handle);
if (link == NULL || link->hl_type != HCI_LINK_ACL)
return;
if (ep.status == 0) {
if (ep.encryption_enable == 0)
link->hl_flags &= ~HCI_LINK_ENCRYPT;
else
link->hl_flags |= (HCI_LINK_AUTH | HCI_LINK_ENCRYPT);
if (link->hl_state == HCI_LINK_WAIT_ENCRYPT)
link->hl_state = HCI_LINK_OPEN;
err = hci_acl_setmode(link);
if (err == EINPROGRESS)
return;
}
hci_acl_linkmode(link);
}
/*
* Change Connection Link Key Complete
*
* Link keys are handled in userland but if we are waiting to secure
* this link, we should notify the upper protocols. A SECURE request
* only needs a single key change, so we can cancel the request.
*/
static void
hci_event_change_con_link_key_compl(struct hci_unit *unit, struct mbuf *m)
{
hci_change_con_link_key_compl_ep ep;
struct hci_link *link;
int err;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
ep.con_handle = HCI_CON_HANDLE(le16toh(ep.con_handle));
DPRINTFN(1, "handle #%d, status=0x%x\n", ep.con_handle, ep.status);
link = hci_link_lookup_handle(unit, ep.con_handle);
if (link == NULL || link->hl_type != HCI_LINK_ACL)
return;
link->hl_flags &= ~HCI_LINK_SECURE_REQ;
if (ep.status == 0) {
link->hl_flags |= (HCI_LINK_AUTH | HCI_LINK_SECURE);
if (link->hl_state == HCI_LINK_WAIT_SECURE)
link->hl_state = HCI_LINK_OPEN;
err = hci_acl_setmode(link);
if (err == EINPROGRESS)
return;
}
hci_acl_linkmode(link);
}
/*
* Read Clock Offset Complete
*
* We keep a note of the clock offset of remote devices when a
* link is made, in order to facilitate reconnections to the device
*/
static void
hci_event_read_clock_offset_compl(struct hci_unit *unit, struct mbuf *m)
{
hci_read_clock_offset_compl_ep ep;
struct hci_link *link;
KASSERT(m->m_pkthdr.len >= sizeof(ep));
m_copydata(m, 0, sizeof(ep), &ep);
m_adj(m, sizeof(ep));
DPRINTFN(1, "handle #%d, offset=%u, status=0x%x\n",
le16toh(ep.con_handle), le16toh(ep.clock_offset), ep.status);
ep.con_handle = HCI_CON_HANDLE(le16toh(ep.con_handle));
link = hci_link_lookup_handle(unit, ep.con_handle);
if (ep.status != 0 || link == NULL)
return;
link->hl_clock = ep.clock_offset;
}
/*
* process results of read_bdaddr command_complete event
*/
static void
hci_cmd_read_bdaddr(struct hci_unit *unit, struct mbuf *m)
{
hci_read_bdaddr_rp rp;
KASSERT(m->m_pkthdr.len >= sizeof(rp));
m_copydata(m, 0, sizeof(rp), &rp);
m_adj(m, sizeof(rp));
if (rp.status > 0)
return;
if ((unit->hci_flags & BTF_INIT_BDADDR) == 0)
return;
bdaddr_copy(&unit->hci_bdaddr, &rp.bdaddr);
unit->hci_flags &= ~BTF_INIT_BDADDR;
cv_broadcast(&unit->hci_init);
}
/*
* process results of read_buffer_size command_complete event
*/
static void
hci_cmd_read_buffer_size(struct hci_unit *unit, struct mbuf *m)
{
hci_read_buffer_size_rp rp;
KASSERT(m->m_pkthdr.len >= sizeof(rp));
m_copydata(m, 0, sizeof(rp), &rp);
m_adj(m, sizeof(rp));
if (rp.status > 0)
return;
if ((unit->hci_flags & BTF_INIT_BUFFER_SIZE) == 0)
return;
unit->hci_max_acl_size = le16toh(rp.max_acl_size);
unit->hci_num_acl_pkts = le16toh(rp.num_acl_pkts);
unit->hci_max_sco_size = rp.max_sco_size;
unit->hci_num_sco_pkts = le16toh(rp.num_sco_pkts);
unit->hci_flags &= ~BTF_INIT_BUFFER_SIZE;
cv_broadcast(&unit->hci_init);
}
/*
* process results of read_local_features command_complete event
*/
static void
hci_cmd_read_local_features(struct hci_unit *unit, struct mbuf *m)
{
hci_read_local_features_rp rp;
KASSERT(m->m_pkthdr.len >= sizeof(rp));
m_copydata(m, 0, sizeof(rp), &rp);
m_adj(m, sizeof(rp));
if (rp.status > 0)
return;
if ((unit->hci_flags & BTF_INIT_FEATURES) == 0)
return;
unit->hci_lmp_mask = 0;
if (rp.features[0] & HCI_LMP_ROLE_SWITCH)
unit->hci_lmp_mask |= HCI_LINK_POLICY_ENABLE_ROLE_SWITCH;
if (rp.features[0] & HCI_LMP_HOLD_MODE)
unit->hci_lmp_mask |= HCI_LINK_POLICY_ENABLE_HOLD_MODE;
if (rp.features[0] & HCI_LMP_SNIFF_MODE)
unit->hci_lmp_mask |= HCI_LINK_POLICY_ENABLE_SNIFF_MODE;
if (rp.features[1] & HCI_LMP_PARK_MODE)
unit->hci_lmp_mask |= HCI_LINK_POLICY_ENABLE_PARK_MODE;
/* ACL packet mask */
unit->hci_acl_mask = HCI_PKT_DM1 | HCI_PKT_DH1;
if (rp.features[0] & HCI_LMP_3SLOT)
unit->hci_acl_mask |= HCI_PKT_DM3 | HCI_PKT_DH3;
if (rp.features[0] & HCI_LMP_5SLOT)
unit->hci_acl_mask |= HCI_PKT_DM5 | HCI_PKT_DH5;
if ((rp.features[3] & HCI_LMP_EDR_ACL_2MBPS) == 0)
unit->hci_acl_mask |= HCI_PKT_2MBPS_DH1
| HCI_PKT_2MBPS_DH3
| HCI_PKT_2MBPS_DH5;
if ((rp.features[3] & HCI_LMP_EDR_ACL_3MBPS) == 0)
unit->hci_acl_mask |= HCI_PKT_3MBPS_DH1
| HCI_PKT_3MBPS_DH3
| HCI_PKT_3MBPS_DH5;
if ((rp.features[4] & HCI_LMP_3SLOT_EDR_ACL) == 0)
unit->hci_acl_mask |= HCI_PKT_2MBPS_DH3
| HCI_PKT_3MBPS_DH3;
if ((rp.features[5] & HCI_LMP_5SLOT_EDR_ACL) == 0)
unit->hci_acl_mask |= HCI_PKT_2MBPS_DH5
| HCI_PKT_3MBPS_DH5;
unit->hci_packet_type = unit->hci_acl_mask;
/* SCO packet mask */
unit->hci_sco_mask = 0;
if (rp.features[1] & HCI_LMP_SCO_LINK)
unit->hci_sco_mask |= HCI_PKT_HV1;
if (rp.features[1] & HCI_LMP_HV2_PKT)
unit->hci_sco_mask |= HCI_PKT_HV2;
if (rp.features[1] & HCI_LMP_HV3_PKT)
unit->hci_sco_mask |= HCI_PKT_HV3;
if (rp.features[3] & HCI_LMP_EV3_PKT)
unit->hci_sco_mask |= HCI_PKT_EV3;
if (rp.features[4] & HCI_LMP_EV4_PKT)
unit->hci_sco_mask |= HCI_PKT_EV4;
if (rp.features[4] & HCI_LMP_EV5_PKT)
unit->hci_sco_mask |= HCI_PKT_EV5;
/* XXX what do 2MBPS/3MBPS/3SLOT eSCO mean? */
unit->hci_flags &= ~BTF_INIT_FEATURES;
cv_broadcast(&unit->hci_init);
DPRINTFN(1, "%s: lmp_mask %4.4x, acl_mask %4.4x, sco_mask %4.4x\n",
device_xname(unit->hci_dev), unit->hci_lmp_mask,
unit->hci_acl_mask, unit->hci_sco_mask);
}
/*
* process results of read_local_ver command_complete event
*
* reading local supported commands is only supported from 1.2 spec
*/
static void
hci_cmd_read_local_ver(struct hci_unit *unit, struct mbuf *m)
{
hci_read_local_ver_rp rp;
KASSERT(m->m_pkthdr.len >= sizeof(rp));
m_copydata(m, 0, sizeof(rp), &rp);
m_adj(m, sizeof(rp));
if (rp.status != 0)
return;
if ((unit->hci_flags & BTF_INIT_COMMANDS) == 0)
return;
if (rp.hci_version < HCI_SPEC_V12) {
unit->hci_flags &= ~BTF_INIT_COMMANDS;
cv_broadcast(&unit->hci_init);
return;
}
hci_send_cmd(unit, HCI_CMD_READ_LOCAL_COMMANDS, NULL, 0);
}
/*
* process results of read_local_commands command_complete event
*/
static void
hci_cmd_read_local_commands(struct hci_unit *unit, struct mbuf *m)
{
hci_read_local_commands_rp rp;
KASSERT(m->m_pkthdr.len >= sizeof(rp));
m_copydata(m, 0, sizeof(rp), &rp);
m_adj(m, sizeof(rp));
if (rp.status != 0)
return;
if ((unit->hci_flags & BTF_INIT_COMMANDS) == 0)
return;
unit->hci_flags &= ~BTF_INIT_COMMANDS;
memcpy(unit->hci_cmds, rp.commands, HCI_COMMANDS_SIZE);
cv_broadcast(&unit->hci_init);
}
/*
* process results of reset command_complete event
*
* This has killed all the connections, so close down anything we have left,
* and reinitialise the unit.
*/
static void
hci_cmd_reset(struct hci_unit *unit, struct mbuf *m)
{
hci_reset_rp rp;
struct hci_link *link, *next;
int acl;
KASSERT(m->m_pkthdr.len >= sizeof(rp));
m_copydata(m, 0, sizeof(rp), &rp);
m_adj(m, sizeof(rp));
if (rp.status != 0)
return;
/*
* release SCO links first, since they may be holding
* an ACL link reference.
*/
for (acl = 0 ; acl < 2 ; acl++) {
next = TAILQ_FIRST(&unit->hci_links);
while ((link = next) != NULL) {
next = TAILQ_NEXT(link, hl_next);
if (acl || link->hl_type != HCI_LINK_ACL)
hci_link_free(link, ECONNABORTED);
}
}
unit->hci_num_acl_pkts = 0;
unit->hci_num_sco_pkts = 0;
if (hci_send_cmd(unit, HCI_CMD_READ_BDADDR, NULL, 0))
return;
if (hci_send_cmd(unit, HCI_CMD_READ_BUFFER_SIZE, NULL, 0))
return;
if (hci_send_cmd(unit, HCI_CMD_READ_LOCAL_FEATURES, NULL, 0))
return;
if (hci_send_cmd(unit, HCI_CMD_READ_LOCAL_VER, NULL, 0))
return;
}
/*
* process command_status event for create_con command
*
* a "Create Connection" command can sometimes fail to start for whatever
* reason and the command_status event returns failure but we get no
* indication of which connection failed (for instance in the case where
* we tried to open too many connections all at once) So, we keep a flag
* on the link to indicate pending status until the command_status event
* is returned to help us decide which needs to be failed.
*
* since created links are inserted at the tail of hci_links, we know that
* the first pending link we find will be the one that this command status
* refers to.
*/
static void
hci_cmd_create_con(struct hci_unit *unit, uint8_t status)
{
struct hci_link *link;
TAILQ_FOREACH(link, &unit->hci_links, hl_next) {
if ((link->hl_flags & HCI_LINK_CREATE_CON) == 0)
continue;
link->hl_flags &= ~HCI_LINK_CREATE_CON;
switch(status) {
case 0x00: /* success */
break;
case 0x0c: /* "Command Disallowed" */
hci_link_free(link, EBUSY);
break;
default: /* some other trouble */
hci_link_free(link, EPROTO);
break;
}
return;
}
}