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hci.c
2268 lines (1871 loc) · 68.6 KB
/
hci.c
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/*
* QEMU Bluetooth HCI logic.
*
* Copyright (C) 2007 OpenMoko, Inc.
* Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "qemu/timer.h"
#include "hw/usb.h"
#include "sysemu/bt.h"
#include "hw/bt.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/replay.h"
#include "qemu/cutils.h"
struct bt_hci_s {
uint8_t *(*evt_packet)(void *opaque);
void (*evt_submit)(void *opaque, int len);
void *opaque;
uint8_t evt_buf[256];
uint8_t acl_buf[4096];
int acl_len;
uint16_t asb_handle;
uint16_t psb_handle;
int last_cmd; /* Note: Always little-endian */
struct bt_device_s *conn_req_host;
struct {
int inquire;
int periodic;
int responses_left;
int responses;
QEMUTimer *inquiry_done;
QEMUTimer *inquiry_next;
int inquiry_length;
int inquiry_period;
int inquiry_mode;
#define HCI_HANDLE_OFFSET 0x20
#define HCI_HANDLES_MAX 0x10
struct bt_hci_master_link_s {
struct bt_link_s *link;
void (*lmp_acl_data)(struct bt_link_s *link,
const uint8_t *data, int start, int len);
QEMUTimer *acl_mode_timer;
} handle[HCI_HANDLES_MAX];
uint32_t role_bmp;
int last_handle;
int connecting;
bdaddr_t awaiting_bdaddr[HCI_HANDLES_MAX];
} lm;
uint8_t event_mask[8];
uint16_t voice_setting; /* Notw: Always little-endian */
uint16_t conn_accept_tout;
QEMUTimer *conn_accept_timer;
struct HCIInfo info;
struct bt_device_s device;
Error *replay_blocker;
};
#define DEFAULT_RSSI_DBM 20
#define hci_from_info(ptr) container_of((ptr), struct bt_hci_s, info)
#define hci_from_device(ptr) container_of((ptr), struct bt_hci_s, device)
struct bt_hci_link_s {
struct bt_link_s btlink;
uint16_t handle; /* Local */
};
/* LMP layer emulation */
#if 0
static void bt_submit_lmp(struct bt_device_s *bt, int length, uint8_t *data)
{
int resp, resplen, error, op, tr;
uint8_t respdata[17];
if (length < 1)
return;
tr = *data & 1;
op = *(data ++) >> 1;
resp = LMP_ACCEPTED;
resplen = 2;
respdata[1] = op;
error = 0;
length --;
if (op >= 0x7c) { /* Extended opcode */
op |= *(data ++) << 8;
resp = LMP_ACCEPTED_EXT;
resplen = 4;
respdata[0] = op >> 8;
respdata[1] = op & 0xff;
length --;
}
switch (op) {
case LMP_ACCEPTED:
/* data[0] Op code
*/
if (length < 1) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = 0;
break;
case LMP_ACCEPTED_EXT:
/* data[0] Escape op code
* data[1] Extended op code
*/
if (length < 2) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = 0;
break;
case LMP_NOT_ACCEPTED:
/* data[0] Op code
* data[1] Error code
*/
if (length < 2) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = 0;
break;
case LMP_NOT_ACCEPTED_EXT:
/* data[0] Op code
* data[1] Extended op code
* data[2] Error code
*/
if (length < 3) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = 0;
break;
case LMP_HOST_CONNECTION_REQ:
break;
case LMP_SETUP_COMPLETE:
resp = LMP_SETUP_COMPLETE;
resplen = 1;
bt->setup = 1;
break;
case LMP_DETACH:
/* data[0] Error code
*/
if (length < 1) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
bt->setup = 0;
resp = 0;
break;
case LMP_SUPERVISION_TIMEOUT:
/* data[0,1] Supervision timeout
*/
if (length < 2) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = 0;
break;
case LMP_QUALITY_OF_SERVICE:
resp = 0;
/* Fall through */
case LMP_QOS_REQ:
/* data[0,1] Poll interval
* data[2] N(BC)
*/
if (length < 3) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
break;
case LMP_MAX_SLOT:
resp = 0;
/* Fall through */
case LMP_MAX_SLOT_REQ:
/* data[0] Max slots
*/
if (length < 1) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
break;
case LMP_AU_RAND:
case LMP_IN_RAND:
case LMP_COMB_KEY:
/* data[0-15] Random number
*/
if (length < 16) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
if (op == LMP_AU_RAND) {
if (bt->key_present) {
resp = LMP_SRES;
resplen = 5;
/* XXX: [Part H] Section 6.1 on page 801 */
} else {
error = HCI_PIN_OR_KEY_MISSING;
goto not_accepted;
}
} else if (op == LMP_IN_RAND) {
error = HCI_PAIRING_NOT_ALLOWED;
goto not_accepted;
} else {
/* XXX: [Part H] Section 3.2 on page 779 */
resp = LMP_UNIT_KEY;
resplen = 17;
memcpy(respdata + 1, bt->key, 16);
error = HCI_UNIT_LINK_KEY_USED;
goto not_accepted;
}
break;
case LMP_UNIT_KEY:
/* data[0-15] Key
*/
if (length < 16) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
memcpy(bt->key, data, 16);
bt->key_present = 1;
break;
case LMP_SRES:
/* data[0-3] Authentication response
*/
if (length < 4) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
break;
case LMP_CLKOFFSET_REQ:
resp = LMP_CLKOFFSET_RES;
resplen = 3;
respdata[1] = 0x33;
respdata[2] = 0x33;
break;
case LMP_CLKOFFSET_RES:
/* data[0,1] Clock offset
* (Slave to master only)
*/
if (length < 2) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
break;
case LMP_VERSION_REQ:
case LMP_VERSION_RES:
/* data[0] VersNr
* data[1,2] CompId
* data[3,4] SubVersNr
*/
if (length < 5) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
if (op == LMP_VERSION_REQ) {
resp = LMP_VERSION_RES;
resplen = 6;
respdata[1] = 0x20;
respdata[2] = 0xff;
respdata[3] = 0xff;
respdata[4] = 0xff;
respdata[5] = 0xff;
} else
resp = 0;
break;
case LMP_FEATURES_REQ:
case LMP_FEATURES_RES:
/* data[0-7] Features
*/
if (length < 8) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
if (op == LMP_FEATURES_REQ) {
resp = LMP_FEATURES_RES;
resplen = 9;
respdata[1] = (bt->lmp_caps >> 0) & 0xff;
respdata[2] = (bt->lmp_caps >> 8) & 0xff;
respdata[3] = (bt->lmp_caps >> 16) & 0xff;
respdata[4] = (bt->lmp_caps >> 24) & 0xff;
respdata[5] = (bt->lmp_caps >> 32) & 0xff;
respdata[6] = (bt->lmp_caps >> 40) & 0xff;
respdata[7] = (bt->lmp_caps >> 48) & 0xff;
respdata[8] = (bt->lmp_caps >> 56) & 0xff;
} else
resp = 0;
break;
case LMP_NAME_REQ:
/* data[0] Name offset
*/
if (length < 1) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = LMP_NAME_RES;
resplen = 17;
respdata[1] = data[0];
respdata[2] = strlen(bt->lmp_name);
memset(respdata + 3, 0x00, 14);
if (respdata[2] > respdata[1])
memcpy(respdata + 3, bt->lmp_name + respdata[1],
respdata[2] - respdata[1]);
break;
case LMP_NAME_RES:
/* data[0] Name offset
* data[1] Name length
* data[2-15] Name fragment
*/
if (length < 16) {
error = HCI_UNSUPPORTED_LMP_PARAMETER_VALUE;
goto not_accepted;
}
resp = 0;
break;
default:
error = HCI_UNKNOWN_LMP_PDU;
/* Fall through */
not_accepted:
if (op >> 8) {
resp = LMP_NOT_ACCEPTED_EXT;
resplen = 5;
respdata[0] = op >> 8;
respdata[1] = op & 0xff;
respdata[2] = error;
} else {
resp = LMP_NOT_ACCEPTED;
resplen = 3;
respdata[0] = op & 0xff;
respdata[1] = error;
}
}
if (resp == 0)
return;
if (resp >> 8) {
respdata[0] = resp >> 8;
respdata[1] = resp & 0xff;
} else
respdata[0] = resp & 0xff;
respdata[0] <<= 1;
respdata[0] |= tr;
}
static void bt_submit_raw_acl(struct bt_piconet_s *net, int length, uint8_t *data)
{
struct bt_device_s *slave;
if (length < 1)
return;
slave = 0;
#if 0
slave = net->slave;
#endif
switch (data[0] & 3) {
case LLID_ACLC:
bt_submit_lmp(slave, length - 1, data + 1);
break;
case LLID_ACLU_START:
#if 0
bt_sumbit_l2cap(slave, length - 1, data + 1, (data[0] >> 2) & 1);
breka;
#endif
default:
case LLID_ACLU_CONT:
break;
}
}
#endif
/* HCI layer emulation */
/* Note: we could ignore endiannes because unswapped handles will still
* be valid as connection identifiers for the guest - they don't have to
* be continuously allocated. We do it though, to preserve similar
* behaviour between hosts. Some things, like the BD_ADDR cannot be
* preserved though (for example if a real hci is used). */
#define HNDL(raw) cpu_to_le16(raw)
static const uint8_t bt_event_reserved_mask[8] = {
0xff, 0x9f, 0xfb, 0xff, 0x07, 0x18, 0x00, 0x00,
};
static void null_hci_send(struct HCIInfo *hci, const uint8_t *data, int len)
{
}
static int null_hci_addr_set(struct HCIInfo *hci, const uint8_t *bd_addr)
{
return -ENOTSUP;
}
struct HCIInfo null_hci = {
.cmd_send = null_hci_send,
.sco_send = null_hci_send,
.acl_send = null_hci_send,
.bdaddr_set = null_hci_addr_set,
};
static inline uint8_t *bt_hci_event_start(struct bt_hci_s *hci,
int evt, int len)
{
uint8_t *packet, mask;
int mask_byte;
if (len > 255) {
fprintf(stderr, "%s: HCI event params too long (%ib)\n",
__FUNCTION__, len);
exit(-1);
}
mask_byte = (evt - 1) >> 3;
mask = 1 << ((evt - 1) & 3);
if (mask & bt_event_reserved_mask[mask_byte] & ~hci->event_mask[mask_byte])
return NULL;
packet = hci->evt_packet(hci->opaque);
packet[0] = evt;
packet[1] = len;
return &packet[2];
}
static inline void bt_hci_event(struct bt_hci_s *hci, int evt,
void *params, int len)
{
uint8_t *packet = bt_hci_event_start(hci, evt, len);
if (!packet)
return;
if (len)
memcpy(packet, params, len);
hci->evt_submit(hci->opaque, len + 2);
}
static inline void bt_hci_event_status(struct bt_hci_s *hci, int status)
{
evt_cmd_status params = {
.status = status,
.ncmd = 1,
.opcode = hci->last_cmd,
};
bt_hci_event(hci, EVT_CMD_STATUS, ¶ms, EVT_CMD_STATUS_SIZE);
}
static inline void bt_hci_event_complete(struct bt_hci_s *hci,
void *ret, int len)
{
uint8_t *packet = bt_hci_event_start(hci, EVT_CMD_COMPLETE,
len + EVT_CMD_COMPLETE_SIZE);
evt_cmd_complete *params = (evt_cmd_complete *) packet;
if (!packet)
return;
params->ncmd = 1;
params->opcode = hci->last_cmd;
if (len)
memcpy(&packet[EVT_CMD_COMPLETE_SIZE], ret, len);
hci->evt_submit(hci->opaque, len + EVT_CMD_COMPLETE_SIZE + 2);
}
static void bt_hci_inquiry_done(void *opaque)
{
struct bt_hci_s *hci = (struct bt_hci_s *) opaque;
uint8_t status = HCI_SUCCESS;
if (!hci->lm.periodic)
hci->lm.inquire = 0;
/* The specification is inconsistent about this one. Page 565 reads
* "The event parameters of Inquiry Complete event will have a summary
* of the result from the Inquiry process, which reports the number of
* nearby Bluetooth devices that responded [so hci->responses].", but
* Event Parameters (see page 729) has only Status. */
bt_hci_event(hci, EVT_INQUIRY_COMPLETE, &status, 1);
}
static void bt_hci_inquiry_result_standard(struct bt_hci_s *hci,
struct bt_device_s *slave)
{
inquiry_info params = {
.num_responses = 1,
.bdaddr = BAINIT(&slave->bd_addr),
.pscan_rep_mode = 0x00, /* R0 */
.pscan_period_mode = 0x00, /* P0 - deprecated */
.pscan_mode = 0x00, /* Standard scan - deprecated */
.dev_class[0] = slave->class[0],
.dev_class[1] = slave->class[1],
.dev_class[2] = slave->class[2],
/* TODO: return the clkoff *differenece* */
.clock_offset = slave->clkoff, /* Note: no swapping */
};
bt_hci_event(hci, EVT_INQUIRY_RESULT, ¶ms, INQUIRY_INFO_SIZE);
}
static void bt_hci_inquiry_result_with_rssi(struct bt_hci_s *hci,
struct bt_device_s *slave)
{
inquiry_info_with_rssi params = {
.num_responses = 1,
.bdaddr = BAINIT(&slave->bd_addr),
.pscan_rep_mode = 0x00, /* R0 */
.pscan_period_mode = 0x00, /* P0 - deprecated */
.dev_class[0] = slave->class[0],
.dev_class[1] = slave->class[1],
.dev_class[2] = slave->class[2],
/* TODO: return the clkoff *differenece* */
.clock_offset = slave->clkoff, /* Note: no swapping */
.rssi = DEFAULT_RSSI_DBM,
};
bt_hci_event(hci, EVT_INQUIRY_RESULT_WITH_RSSI,
¶ms, INQUIRY_INFO_WITH_RSSI_SIZE);
}
static void bt_hci_inquiry_result(struct bt_hci_s *hci,
struct bt_device_s *slave)
{
if (!slave->inquiry_scan || !hci->lm.responses_left)
return;
hci->lm.responses_left --;
hci->lm.responses ++;
switch (hci->lm.inquiry_mode) {
case 0x00:
bt_hci_inquiry_result_standard(hci, slave);
return;
case 0x01:
bt_hci_inquiry_result_with_rssi(hci, slave);
return;
default:
fprintf(stderr, "%s: bad inquiry mode %02x\n", __FUNCTION__,
hci->lm.inquiry_mode);
exit(-1);
}
}
static void bt_hci_mod_timer_1280ms(QEMUTimer *timer, int period)
{
timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
(uint64_t)(period << 7) * 10000000);
}
static void bt_hci_inquiry_start(struct bt_hci_s *hci, int length)
{
struct bt_device_s *slave;
hci->lm.inquiry_length = length;
for (slave = hci->device.net->slave; slave; slave = slave->next)
/* Don't uncover ourselves. */
if (slave != &hci->device)
bt_hci_inquiry_result(hci, slave);
/* TODO: register for a callback on a new device's addition to the
* scatternet so that if it's added before inquiry_length expires,
* an Inquiry Result is generated immediately. Alternatively re-loop
* through the devices on the inquiry_length expiration and report
* devices not seen before. */
if (hci->lm.responses_left)
bt_hci_mod_timer_1280ms(hci->lm.inquiry_done, hci->lm.inquiry_length);
else
bt_hci_inquiry_done(hci);
if (hci->lm.periodic)
bt_hci_mod_timer_1280ms(hci->lm.inquiry_next, hci->lm.inquiry_period);
}
static void bt_hci_inquiry_next(void *opaque)
{
struct bt_hci_s *hci = (struct bt_hci_s *) opaque;
hci->lm.responses_left += hci->lm.responses;
hci->lm.responses = 0;
bt_hci_inquiry_start(hci, hci->lm.inquiry_length);
}
static inline int bt_hci_handle_bad(struct bt_hci_s *hci, uint16_t handle)
{
return !(handle & HCI_HANDLE_OFFSET) ||
handle >= (HCI_HANDLE_OFFSET | HCI_HANDLES_MAX) ||
!hci->lm.handle[handle & ~HCI_HANDLE_OFFSET].link;
}
static inline int bt_hci_role_master(struct bt_hci_s *hci, uint16_t handle)
{
return !!(hci->lm.role_bmp & (1 << (handle & ~HCI_HANDLE_OFFSET)));
}
static inline struct bt_device_s *bt_hci_remote_dev(struct bt_hci_s *hci,
uint16_t handle)
{
struct bt_link_s *link = hci->lm.handle[handle & ~HCI_HANDLE_OFFSET].link;
return bt_hci_role_master(hci, handle) ? link->slave : link->host;
}
static void bt_hci_mode_tick(void *opaque);
static void bt_hci_lmp_link_establish(struct bt_hci_s *hci,
struct bt_link_s *link, int master)
{
hci->lm.handle[hci->lm.last_handle].link = link;
if (master) {
/* We are the master side of an ACL link */
hci->lm.role_bmp |= 1 << hci->lm.last_handle;
hci->lm.handle[hci->lm.last_handle].lmp_acl_data =
link->slave->lmp_acl_data;
} else {
/* We are the slave side of an ACL link */
hci->lm.role_bmp &= ~(1 << hci->lm.last_handle);
hci->lm.handle[hci->lm.last_handle].lmp_acl_data =
link->host->lmp_acl_resp;
}
/* Mode */
if (master) {
link->acl_mode = acl_active;
hci->lm.handle[hci->lm.last_handle].acl_mode_timer =
timer_new_ns(QEMU_CLOCK_VIRTUAL, bt_hci_mode_tick, link);
}
}
static void bt_hci_lmp_link_teardown(struct bt_hci_s *hci, uint16_t handle)
{
handle &= ~HCI_HANDLE_OFFSET;
hci->lm.handle[handle].link = NULL;
if (bt_hci_role_master(hci, handle)) {
timer_del(hci->lm.handle[handle].acl_mode_timer);
timer_free(hci->lm.handle[handle].acl_mode_timer);
}
}
static int bt_hci_connect(struct bt_hci_s *hci, bdaddr_t *bdaddr)
{
struct bt_device_s *slave;
struct bt_link_s link;
for (slave = hci->device.net->slave; slave; slave = slave->next)
if (slave->page_scan && !bacmp(&slave->bd_addr, bdaddr))
break;
if (!slave || slave == &hci->device)
return -ENODEV;
bacpy(&hci->lm.awaiting_bdaddr[hci->lm.connecting ++], &slave->bd_addr);
link.slave = slave;
link.host = &hci->device;
link.slave->lmp_connection_request(&link); /* Always last */
return 0;
}
static void bt_hci_connection_reject(struct bt_hci_s *hci,
struct bt_device_s *host, uint8_t because)
{
struct bt_link_s link = {
.slave = &hci->device,
.host = host,
/* Rest uninitialised */
};
host->reject_reason = because;
host->lmp_connection_complete(&link);
}
static void bt_hci_connection_reject_event(struct bt_hci_s *hci,
bdaddr_t *bdaddr)
{
evt_conn_complete params;
params.status = HCI_NO_CONNECTION;
params.handle = 0;
bacpy(¶ms.bdaddr, bdaddr);
params.link_type = ACL_LINK;
params.encr_mode = 0x00; /* Encryption not required */
bt_hci_event(hci, EVT_CONN_COMPLETE, ¶ms, EVT_CONN_COMPLETE_SIZE);
}
static void bt_hci_connection_accept(struct bt_hci_s *hci,
struct bt_device_s *host)
{
struct bt_hci_link_s *link = g_malloc0(sizeof(struct bt_hci_link_s));
evt_conn_complete params;
uint16_t handle;
uint8_t status = HCI_SUCCESS;
int tries = HCI_HANDLES_MAX;
/* Make a connection handle */
do {
while (hci->lm.handle[++ hci->lm.last_handle].link && -- tries)
hci->lm.last_handle &= HCI_HANDLES_MAX - 1;
handle = hci->lm.last_handle | HCI_HANDLE_OFFSET;
} while ((handle == hci->asb_handle || handle == hci->psb_handle) &&
tries);
if (!tries) {
g_free(link);
bt_hci_connection_reject(hci, host, HCI_REJECTED_LIMITED_RESOURCES);
status = HCI_NO_CONNECTION;
goto complete;
}
link->btlink.slave = &hci->device;
link->btlink.host = host;
link->handle = handle;
/* Link established */
bt_hci_lmp_link_establish(hci, &link->btlink, 0);
complete:
params.status = status;
params.handle = HNDL(handle);
bacpy(¶ms.bdaddr, &host->bd_addr);
params.link_type = ACL_LINK;
params.encr_mode = 0x00; /* Encryption not required */
bt_hci_event(hci, EVT_CONN_COMPLETE, ¶ms, EVT_CONN_COMPLETE_SIZE);
/* Neets to be done at the very end because it can trigger a (nested)
* disconnected, in case the other and had cancelled the request
* locally. */
if (status == HCI_SUCCESS) {
host->reject_reason = 0;
host->lmp_connection_complete(&link->btlink);
}
}
static void bt_hci_lmp_connection_request(struct bt_link_s *link)
{
struct bt_hci_s *hci = hci_from_device(link->slave);
evt_conn_request params;
if (hci->conn_req_host) {
bt_hci_connection_reject(hci, link->host,
HCI_REJECTED_LIMITED_RESOURCES);
return;
}
hci->conn_req_host = link->host;
/* TODO: if masked and auto-accept, then auto-accept,
* if masked and not auto-accept, then auto-reject */
/* TODO: kick the hci->conn_accept_timer, timeout after
* hci->conn_accept_tout * 0.625 msec */
bacpy(¶ms.bdaddr, &link->host->bd_addr);
memcpy(¶ms.dev_class, &link->host->class, sizeof(params.dev_class));
params.link_type = ACL_LINK;
bt_hci_event(hci, EVT_CONN_REQUEST, ¶ms, EVT_CONN_REQUEST_SIZE);
}
static void bt_hci_conn_accept_timeout(void *opaque)
{
struct bt_hci_s *hci = (struct bt_hci_s *) opaque;
if (!hci->conn_req_host)
/* Already accepted or rejected. If the other end cancelled the
* connection request then we still have to reject or accept it
* and then we'll get a disconnect. */
return;
/* TODO */
}
/* Remove from the list of devices which we wanted to connect to and
* are awaiting a response from. If the callback sees a response from
* a device which is not on the list it will assume it's a connection
* that's been cancelled by the host in the meantime and immediately
* try to detach the link and send a Connection Complete. */
static int bt_hci_lmp_connection_ready(struct bt_hci_s *hci,
bdaddr_t *bdaddr)
{
int i;
for (i = 0; i < hci->lm.connecting; i ++)
if (!bacmp(&hci->lm.awaiting_bdaddr[i], bdaddr)) {
if (i < -- hci->lm.connecting)
bacpy(&hci->lm.awaiting_bdaddr[i],
&hci->lm.awaiting_bdaddr[hci->lm.connecting]);
return 0;
}
return 1;
}
static void bt_hci_lmp_connection_complete(struct bt_link_s *link)
{
struct bt_hci_s *hci = hci_from_device(link->host);
evt_conn_complete params;
uint16_t handle;
uint8_t status = HCI_SUCCESS;
int tries = HCI_HANDLES_MAX;
if (bt_hci_lmp_connection_ready(hci, &link->slave->bd_addr)) {
if (!hci->device.reject_reason)
link->slave->lmp_disconnect_slave(link);
handle = 0;
status = HCI_NO_CONNECTION;
goto complete;
}
if (hci->device.reject_reason) {
handle = 0;
status = hci->device.reject_reason;
goto complete;
}
/* Make a connection handle */
do {
while (hci->lm.handle[++ hci->lm.last_handle].link && -- tries)
hci->lm.last_handle &= HCI_HANDLES_MAX - 1;
handle = hci->lm.last_handle | HCI_HANDLE_OFFSET;
} while ((handle == hci->asb_handle || handle == hci->psb_handle) &&
tries);
if (!tries) {
link->slave->lmp_disconnect_slave(link);
status = HCI_NO_CONNECTION;
goto complete;
}
/* Link established */
link->handle = handle;
bt_hci_lmp_link_establish(hci, link, 1);
complete:
params.status = status;
params.handle = HNDL(handle);
params.link_type = ACL_LINK;
bacpy(¶ms.bdaddr, &link->slave->bd_addr);
params.encr_mode = 0x00; /* Encryption not required */
bt_hci_event(hci, EVT_CONN_COMPLETE, ¶ms, EVT_CONN_COMPLETE_SIZE);
}
static void bt_hci_disconnect(struct bt_hci_s *hci,
uint16_t handle, int reason)
{
struct bt_link_s *btlink =
hci->lm.handle[handle & ~HCI_HANDLE_OFFSET].link;
struct bt_hci_link_s *link;
evt_disconn_complete params;
if (bt_hci_role_master(hci, handle)) {
btlink->slave->reject_reason = reason;
btlink->slave->lmp_disconnect_slave(btlink);
/* The link pointer is invalid from now on */
goto complete;
}
btlink->host->reject_reason = reason;
btlink->host->lmp_disconnect_master(btlink);
/* We are the slave, we get to clean this burden */
link = (struct bt_hci_link_s *) btlink;
g_free(link);
complete:
bt_hci_lmp_link_teardown(hci, handle);
params.status = HCI_SUCCESS;
params.handle = HNDL(handle);
params.reason = HCI_CONNECTION_TERMINATED;
bt_hci_event(hci, EVT_DISCONN_COMPLETE,
¶ms, EVT_DISCONN_COMPLETE_SIZE);
}
/* TODO: use only one function */
static void bt_hci_lmp_disconnect_host(struct bt_link_s *link)
{
struct bt_hci_s *hci = hci_from_device(link->host);
uint16_t handle = link->handle;
evt_disconn_complete params;
bt_hci_lmp_link_teardown(hci, handle);
params.status = HCI_SUCCESS;
params.handle = HNDL(handle);
params.reason = hci->device.reject_reason;
bt_hci_event(hci, EVT_DISCONN_COMPLETE,
¶ms, EVT_DISCONN_COMPLETE_SIZE);
}
static void bt_hci_lmp_disconnect_slave(struct bt_link_s *btlink)
{
struct bt_hci_link_s *link = (struct bt_hci_link_s *) btlink;
struct bt_hci_s *hci = hci_from_device(btlink->slave);
uint16_t handle = link->handle;
evt_disconn_complete params;
g_free(link);
bt_hci_lmp_link_teardown(hci, handle);
params.status = HCI_SUCCESS;
params.handle = HNDL(handle);
params.reason = hci->device.reject_reason;
bt_hci_event(hci, EVT_DISCONN_COMPLETE,
¶ms, EVT_DISCONN_COMPLETE_SIZE);
}
static int bt_hci_name_req(struct bt_hci_s *hci, bdaddr_t *bdaddr)
{
struct bt_device_s *slave;
evt_remote_name_req_complete params;
for (slave = hci->device.net->slave; slave; slave = slave->next)
if (slave->page_scan && !bacmp(&slave->bd_addr, bdaddr))
break;
if (!slave)
return -ENODEV;
bt_hci_event_status(hci, HCI_SUCCESS);
params.status = HCI_SUCCESS;
bacpy(¶ms.bdaddr, &slave->bd_addr);
pstrcpy(params.name, sizeof(params.name), slave->lmp_name ?: "");
bt_hci_event(hci, EVT_REMOTE_NAME_REQ_COMPLETE,
¶ms, EVT_REMOTE_NAME_REQ_COMPLETE_SIZE);
return 0;
}
static int bt_hci_features_req(struct bt_hci_s *hci, uint16_t handle)
{
struct bt_device_s *slave;
evt_read_remote_features_complete params;
if (bt_hci_handle_bad(hci, handle))
return -ENODEV;
slave = bt_hci_remote_dev(hci, handle);
bt_hci_event_status(hci, HCI_SUCCESS);
params.status = HCI_SUCCESS;
params.handle = HNDL(handle);
params.features[0] = (slave->lmp_caps >> 0) & 0xff;
params.features[1] = (slave->lmp_caps >> 8) & 0xff;
params.features[2] = (slave->lmp_caps >> 16) & 0xff;