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M7350/external/bluetooth/bluez/emulator/amp.c
T f75098198c M7350v5_en_gpl
2024-09-09 08:57:42 +00:00

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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2011-2012 Intel Corporation
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include "src/shared/util.h"
#include "monitor/mainloop.h"
#include "monitor/bt.h"
#include "amp.h"
#define PHY_MODE_IDLE 0x00
#define PHY_MODE_INITIATOR 0x01
#define PHY_MODE_ACCEPTOR 0x02
#define MAX_ASSOC_LEN 672
struct bt_amp {
volatile int ref_count;
int vhci_fd;
char phylink_path[32];
int phylink_fd;
uint8_t event_mask[16];
uint16_t manufacturer;
uint8_t commands[64];
uint8_t features[8];
uint8_t amp_status;
uint8_t amp_type;
uint8_t local_assoc[MAX_ASSOC_LEN];
uint16_t local_assoc_len;
uint8_t remote_assoc[MAX_ASSOC_LEN];
uint16_t remote_assoc_len;
uint8_t phy_mode;
uint8_t phy_handle;
uint16_t logic_handle;
};
static void reset_defaults(struct bt_amp *amp)
{
memset(amp->event_mask, 0, sizeof(amp->event_mask));
amp->event_mask[1] |= 0x20; /* Command Complete */
amp->event_mask[1] |= 0x40; /* Command Status */
amp->event_mask[1] |= 0x80; /* Hardware Error */
amp->event_mask[2] |= 0x01; /* Flush Occurred */
amp->event_mask[2] |= 0x04; /* Number of Completed Packets */
amp->event_mask[3] |= 0x02; /* Data Buffer Overflow */
amp->event_mask[3] |= 0x20; /* QoS Violation */
amp->event_mask[7] |= 0x01; /* Enhanced Flush Complete */
amp->event_mask[8] |= 0x01; /* Physical Link Complete */
amp->event_mask[8] |= 0x02; /* Channel Selected */
amp->event_mask[8] |= 0x04; /* Disconnection Physical Link Complete */
amp->event_mask[8] |= 0x08; /* Physical Link Loss Early Warning */
amp->event_mask[8] |= 0x10; /* Physical Link Recovery */
amp->event_mask[8] |= 0x20; /* Logical Link Complete */
amp->event_mask[8] |= 0x40; /* Disconection Logical Link Complete */
amp->event_mask[8] |= 0x80; /* Flow Specification Modify Complete */
amp->event_mask[9] |= 0x01; /* Number of Completed Data Blocks */
amp->event_mask[9] |= 0x02; /* AMP Start Test */
amp->event_mask[9] |= 0x04; /* AMP Test End */
amp->event_mask[9] |= 0x08; /* AMP Receiver Report */
amp->event_mask[9] |= 0x10; /* Short Range Mode Change Complete */
amp->event_mask[9] |= 0x20; /* AMP Status Change */
amp->manufacturer = 0x003f; /* Bluetooth SIG (63) */
memset(amp->commands, 0, sizeof(amp->commands));
amp->commands[5] |= 0x40; /* Set Event Mask */
amp->commands[5] |= 0x80; /* Reset */
//amp->commands[6] |= 0x01; /* Set Event Filter */
//amp->commands[7] |= 0x04; /* Read Connection Accept Timeout */
//amp->commands[7] |= 0x08; /* Write Connection Accept Timeout */
//amp->commands[10] |= 0x80; /* Host Number of Completed Packets */
//amp->commands[11] |= 0x01; /* Read Link Supervision Timeout */
//amp->commands[11] |= 0x02; /* Write Link Supervision Timeout */
amp->commands[14] |= 0x08; /* Read Local Version Information */
amp->commands[14] |= 0x10; /* Read Local Supported Commands */
amp->commands[14] |= 0x20; /* Read Local Supported Features */
amp->commands[14] |= 0x80; /* Read Buffer Size */
//amp->commands[15] |= 0x04; /* Read Failed Contact Counter */
//amp->commands[15] |= 0x08; /* Reset Failed Contact Counter */
//amp->commands[15] |= 0x10; /* Read Link Quality */
//amp->commands[15] |= 0x20; /* Read RSSI */
//amp->commands[16] |= 0x04; /* Enable Device Under Test Mode */
//amp->commands[19] |= 0x40; /* Enhanced Flush */
amp->commands[21] |= 0x01; /* Create Physical Link */
amp->commands[21] |= 0x02; /* Accept Physical Link */
amp->commands[21] |= 0x04; /* Disconnect Phyiscal Link */
amp->commands[21] |= 0x08; /* Create Logical Link */
amp->commands[21] |= 0x10; /* Accept Logical Link */
amp->commands[21] |= 0x20; /* Disconnect Logical Link */
amp->commands[21] |= 0x40; /* Logical Link Cancel */
//amp->commands[21] |= 0x80; /* Flow Specification Modify */
//amp->commands[22] |= 0x01; /* Read Logical Link Accept Timeout */
//amp->commands[22] |= 0x02; /* Write Logical Link Accept Timeout */
amp->commands[22] |= 0x04; /* Set Event Mask Page 2 */
amp->commands[22] |= 0x08; /* Read Location Data */
amp->commands[22] |= 0x10; /* Write Location Data */
amp->commands[22] |= 0x20; /* Read Local AMP Info */
amp->commands[22] |= 0x40; /* Read Local AMP ASSOC */
amp->commands[22] |= 0x80; /* Write Remote AMP ASSOC */
amp->commands[23] |= 0x01; /* Read Flow Control Mode */
amp->commands[23] |= 0x02; /* Write Flow Control Mode */
amp->commands[23] |= 0x04; /* Read Data Block Size */
//amp->commands[23] |= 0x20; /* Enable AMP Receiver Reports */
//amp->commands[23] |= 0x40; /* AMP Test End */
//amp->commands[23] |= 0x80; /* AMP Test */
//amp->commands[24] |= 0x04; /* Read Best Effort Flush Timeout */
//amp->commands[24] |= 0x08; /* Write Best Effort Flush Timeout */
//amp->commands[24] |= 0x10; /* Short Range Mode */
memset(amp->features, 0, sizeof(amp->features));
amp->amp_status = 0x01; /* Used for Bluetooth only */
amp->amp_type = 0x42; /* Fake virtual AMP type */
memset(amp->local_assoc, 0, sizeof(amp->local_assoc));
amp->local_assoc_len = 0;
memset(amp->remote_assoc, 0, sizeof(amp->remote_assoc));
amp->remote_assoc_len = 0;
amp->phy_mode = PHY_MODE_IDLE;
amp->phy_handle = 0x00; /* Invalid physical link handle */
amp->logic_handle = 0x0000;
}
static void send_packet(struct bt_amp *amp, const void *data, uint16_t len)
{
if (write(amp->vhci_fd, data, len) < 0)
fprintf(stderr, "Write to /dev/vhci failed\n");
}
static void send_event(struct bt_amp *amp, uint8_t event,
const void *data, uint8_t len)
{
struct bt_hci_evt_hdr *hdr;
uint16_t pkt_len;
void *pkt_data;
pkt_len = 1 + sizeof(*hdr) + len;
pkt_data = alloca(pkt_len);
if (!pkt_data)
return;
((uint8_t *) pkt_data)[0] = BT_H4_EVT_PKT;
hdr = pkt_data + 1;
hdr->evt = event;
hdr->plen = len;
if (len > 0)
memcpy(pkt_data + 1 + sizeof(*hdr), data, len);
send_packet(amp, pkt_data, pkt_len);
}
static void cmd_complete(struct bt_amp *amp, uint16_t opcode,
const void *data, uint8_t len)
{
struct bt_hci_evt_hdr *hdr;
struct bt_hci_evt_cmd_complete *cc;
uint16_t pkt_len;
void *pkt_data;
pkt_len = 1 + sizeof(*hdr) + sizeof(*cc) + len;
pkt_data = alloca(pkt_len);
if (!pkt_data)
return;
((uint8_t *) pkt_data)[0] = BT_H4_EVT_PKT;
hdr = pkt_data + 1;
hdr->evt = BT_HCI_EVT_CMD_COMPLETE;
hdr->plen = sizeof(*cc) + len;
cc = pkt_data + 1 + sizeof(*hdr);
cc->ncmd = 0x01;
cc->opcode = cpu_to_le16(opcode);
if (len > 0)
memcpy(pkt_data + 1 + sizeof(*hdr) + sizeof(*cc), data, len);
send_packet(amp, pkt_data, pkt_len);
}
static void cmd_status(struct bt_amp *amp, uint8_t status, uint16_t opcode)
{
struct bt_hci_evt_hdr *hdr;
struct bt_hci_evt_cmd_status *cs;
uint16_t pkt_len;
void *pkt_data;
pkt_len = 1 + sizeof(*hdr) + sizeof(*cs);
pkt_data = alloca(pkt_len);
if (!pkt_data)
return;
((uint8_t *) pkt_data)[0] = BT_H4_EVT_PKT;
hdr = pkt_data + 1;
hdr->evt = BT_HCI_EVT_CMD_STATUS;
hdr->plen = sizeof(*cs);
cs = pkt_data + 1 + sizeof(*hdr);
cs->status = status;
cs->ncmd = 0x01;
cs->opcode = cpu_to_le16(opcode);
send_packet(amp, pkt_data, pkt_len);
}
static void cmd_set_event_mask(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_set_event_mask *cmd = data;
uint8_t status;
memcpy(amp->event_mask, cmd->mask, 8);
status = BT_HCI_ERR_SUCCESS;
cmd_complete(amp, BT_HCI_CMD_SET_EVENT_MASK, &status, sizeof(status));
}
static void cmd_reset(struct bt_amp *amp, const void *data, uint8_t size)
{
uint8_t status;
reset_defaults(amp);
amp->local_assoc[0] = 0x00;
amp->local_assoc_len = 1;
status = BT_HCI_ERR_SUCCESS;
cmd_complete(amp, BT_HCI_CMD_RESET, &status, sizeof(status));
}
static void cmd_read_local_version(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_local_version rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.hci_ver = 0x05;
rsp.hci_rev = cpu_to_le16(0x0000);
rsp.lmp_ver = 0x01;
rsp.manufacturer = cpu_to_le16(amp->manufacturer);
rsp.lmp_subver = cpu_to_le16(0x0000);
cmd_complete(amp, BT_HCI_CMD_READ_LOCAL_VERSION, &rsp, sizeof(rsp));
}
static void cmd_read_local_commands(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_local_commands rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
memcpy(rsp.commands, amp->commands, 64);
cmd_complete(amp, BT_HCI_CMD_READ_LOCAL_COMMANDS, &rsp, sizeof(rsp));
}
static void cmd_read_local_features(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_local_features rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
memcpy(rsp.features, amp->features, 8);
cmd_complete(amp, BT_HCI_CMD_READ_LOCAL_FEATURES, &rsp, sizeof(rsp));
}
static void cmd_read_buffer_size(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_buffer_size rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.acl_mtu = cpu_to_le16(0x0000);
rsp.sco_mtu = 0x00;
rsp.acl_max_pkt = cpu_to_le16(0x0000);
rsp.sco_max_pkt = cpu_to_le16(0x0000);
cmd_complete(amp, BT_HCI_CMD_READ_BUFFER_SIZE, &rsp, sizeof(rsp));
}
static void evt_phy_link_complete(struct bt_amp *amp)
{
struct bt_hci_evt_phy_link_complete evt;
evt.status = BT_HCI_ERR_SUCCESS;
evt.phy_handle = amp->phy_handle;
send_event(amp, BT_HCI_EVT_PHY_LINK_COMPLETE, &evt, sizeof(evt));
}
static void evt_disconn_phy_link_complete(struct bt_amp *amp, uint8_t reason)
{
struct bt_hci_evt_disconn_phy_link_complete evt;
evt.status = BT_HCI_ERR_SUCCESS;
evt.phy_handle = amp->phy_handle;
evt.reason = reason;
send_event(amp, BT_HCI_EVT_DISCONN_PHY_LINK_COMPLETE,
&evt, sizeof(evt));
}
static void link_callback(int fd, uint32_t events, void *user_data)
{
struct bt_amp *amp = user_data;
if (events & (EPOLLERR | EPOLLHUP)) {
close(fd);
mainloop_remove_fd(fd);
evt_disconn_phy_link_complete(amp, 0x13);
amp->phy_mode = PHY_MODE_IDLE;
amp->phy_handle = 0x00;
return;
}
}
static void cmd_create_phy_link(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_create_phy_link *cmd = data;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_CREATE_PHY_LINK);
return;
}
if (amp->phy_mode != PHY_MODE_IDLE) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_CREATE_PHY_LINK);
return;
}
amp->phy_mode = PHY_MODE_INITIATOR;
amp->phy_handle = cmd->phy_handle;
cmd_status(amp, BT_HCI_ERR_SUCCESS, BT_HCI_CMD_CREATE_PHY_LINK);
}
static void cmd_accept_phy_link(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_accept_phy_link *cmd = data;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_ACCEPT_PHY_LINK);
return;
}
if (amp->phy_mode != PHY_MODE_IDLE) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_ACCEPT_PHY_LINK);
return;
}
amp->phy_mode = PHY_MODE_ACCEPTOR;
amp->phy_handle = cmd->phy_handle;
cmd_status(amp, BT_HCI_ERR_SUCCESS, BT_HCI_CMD_ACCEPT_PHY_LINK);
}
static void cmd_disconn_phy_link(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_disconn_phy_link *cmd = data;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_DISCONN_PHY_LINK);
return;
}
if (amp->phy_mode == PHY_MODE_IDLE) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_DISCONN_PHY_LINK);
return;
}
if (cmd->phy_handle != amp->phy_handle) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_DISCONN_PHY_LINK);
return;
}
cmd_status(amp, BT_HCI_ERR_SUCCESS, BT_HCI_CMD_DISCONN_PHY_LINK);
mainloop_remove_fd(amp->phylink_fd);
close(amp->phylink_fd);
evt_disconn_phy_link_complete(amp, cmd->reason);
amp->phy_mode = PHY_MODE_IDLE;
amp->phy_handle = 0x00;
}
static void evt_logic_link_complete(struct bt_amp *amp)
{
struct bt_hci_evt_logic_link_complete evt;
evt.status = BT_HCI_ERR_SUCCESS;
evt.handle = htobs(amp->logic_handle);
evt.phy_handle = amp->phy_handle;
evt.flow_spec = 0x00;
send_event(amp, BT_HCI_EVT_LOGIC_LINK_COMPLETE, &evt, sizeof(evt));
}
static void evt_disconn_logic_link_complete(struct bt_amp *amp, uint8_t reason)
{
struct bt_hci_evt_disconn_logic_link_complete evt;
evt.status = BT_HCI_ERR_SUCCESS;
evt.handle = htobs(amp->logic_handle);
evt.reason = reason;
send_event(amp, BT_HCI_EVT_DISCONN_LOGIC_LINK_COMPLETE,
&evt, sizeof(evt));
}
static void cmd_create_logic_link(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_create_logic_link *cmd = data;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_CREATE_LOGIC_LINK);
return;
}
if (amp->phy_mode != PHY_MODE_IDLE) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_CREATE_LOGIC_LINK);
return;
}
if (amp->logic_handle != 0x00) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_CREATE_LOGIC_LINK);
return;
}
cmd_status(amp, BT_HCI_ERR_SUCCESS, BT_HCI_CMD_CREATE_LOGIC_LINK);
amp->logic_handle = 0x0042;
evt_logic_link_complete(amp);
}
static void cmd_accept_logic_link(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_accept_logic_link *cmd = data;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_ACCEPT_LOGIC_LINK);
return;
}
if (amp->phy_mode != PHY_MODE_IDLE) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_ACCEPT_LOGIC_LINK);
return;
}
if (amp->logic_handle != 0x00) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_ACCEPT_LOGIC_LINK);
return;
}
cmd_status(amp, BT_HCI_ERR_SUCCESS, BT_HCI_CMD_ACCEPT_LOGIC_LINK);
amp->logic_handle = 0x0023;
evt_logic_link_complete(amp);
}
static void cmd_disconn_logic_link(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_disconn_logic_link *cmd = data;
if (cmd->handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_DISCONN_LOGIC_LINK);
return;
}
if (cmd->handle != amp->logic_handle) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_DISCONN_LOGIC_LINK);
return;
}
cmd_status(amp, BT_HCI_ERR_SUCCESS, BT_HCI_CMD_DISCONN_LOGIC_LINK);
evt_disconn_logic_link_complete(amp, 0x13);
amp->logic_handle = 0x0000;
}
static void cmd_logic_link_cancel(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_logic_link_cancel *cmd = data;
struct bt_hci_rsp_logic_link_cancel rsp;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_LOGIC_LINK_CANCEL);
return;
}
if (amp->phy_mode != PHY_MODE_IDLE) {
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_LOGIC_LINK_CANCEL);
return;
}
amp->logic_handle = 0x0000;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.phy_handle = amp->phy_handle;
rsp.flow_spec = 0x00;
cmd_complete(amp, BT_HCI_CMD_LOGIC_LINK_CANCEL, &rsp, sizeof(rsp));
}
static void cmd_set_event_mask_page2(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_set_event_mask_page2 *cmd = data;
uint8_t status;
memcpy(amp->event_mask + 8, cmd->mask, 8);
status = BT_HCI_ERR_SUCCESS;
cmd_complete(amp, BT_HCI_CMD_SET_EVENT_MASK_PAGE2,
&status, sizeof(status));
}
static void cmd_read_location_data(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_location_data rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.domain_aware = 0x00;
rsp.domain[0] = 0x58;
rsp.domain[1] = 0x58;
rsp.domain_options = 0x58;
rsp.options = 0x00;
cmd_complete(amp, BT_HCI_CMD_READ_LOCATION_DATA, &rsp, sizeof(rsp));
}
static void cmd_write_location_data(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_write_location_data *cmd = data;
uint8_t status;
if (cmd->domain_aware > 0x01) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_WRITE_LOCATION_DATA);
return;
}
status = BT_HCI_ERR_SUCCESS;
cmd_complete(amp, BT_HCI_CMD_WRITE_LOCATION_DATA,
&status, sizeof(status));
}
static void cmd_read_flow_control_mode(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_flow_control_mode rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.mode = 0x01;
cmd_complete(amp, BT_HCI_CMD_READ_FLOW_CONTROL_MODE,
&rsp, sizeof(rsp));
}
static void cmd_write_flow_control_mode(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_write_flow_control_mode *cmd = data;
uint8_t status;
if (cmd->mode != 0x01) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_WRITE_FLOW_CONTROL_MODE);
return;
}
status = BT_HCI_ERR_SUCCESS;
cmd_complete(amp, BT_HCI_CMD_WRITE_FLOW_CONTROL_MODE,
&status, sizeof(status));
}
static void cmd_read_data_block_size(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_data_block_size rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.max_acl_len = cpu_to_le16(1492);
rsp.block_len = cpu_to_le16(1492);
rsp.num_blocks = cpu_to_le16(1);
cmd_complete(amp, BT_HCI_CMD_READ_DATA_BLOCK_SIZE, &rsp, sizeof(rsp));
}
static void cmd_read_local_amp_info(struct bt_amp *amp,
const void *data, uint8_t size)
{
struct bt_hci_rsp_read_local_amp_info rsp;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.amp_status = amp->amp_status;
rsp.total_bw = cpu_to_le32(24000);
rsp.max_bw = cpu_to_le32(24000);
rsp.min_latency = cpu_to_le32(100);
rsp.max_pdu = cpu_to_le32(1492);
rsp.amp_type = amp->amp_type;
rsp.pal_cap = cpu_to_le16(0x0001);
rsp.max_assoc_len = cpu_to_le16(MAX_ASSOC_LEN);
rsp.max_flush_to = cpu_to_le32(20000);
rsp.be_flush_to = cpu_to_le32(20000);
cmd_complete(amp, BT_HCI_CMD_READ_LOCAL_AMP_INFO, &rsp, sizeof(rsp));
}
static void cmd_read_local_amp_assoc(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_read_local_amp_assoc *cmd = data;
struct bt_hci_rsp_read_local_amp_assoc rsp;
uint16_t len_so_far, remain_assoc_len, fragment_len;
if (cmd->phy_handle != amp->phy_handle) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_READ_LOCAL_AMP_ASSOC);
return;
}
len_so_far = le16_to_cpu(cmd->len_so_far);
remain_assoc_len = amp->local_assoc_len - len_so_far;
fragment_len = remain_assoc_len > 248 ? 248 : remain_assoc_len;
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.phy_handle = cmd->phy_handle;
rsp.remain_assoc_len = cpu_to_le16(remain_assoc_len);
memcpy(rsp.assoc_fragment, amp->local_assoc + len_so_far,
fragment_len);
cmd_complete(amp, BT_HCI_CMD_READ_LOCAL_AMP_ASSOC,
&rsp, 4 + fragment_len);
}
static int create_unix_server(const char *path)
{
struct sockaddr_un addr;
int fd;
fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
if (fd < 0)
return -1;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
addr.sun_path[0] = '\0';
strcpy(addr.sun_path + 1, path);
if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(fd);
return -1;
}
if (listen(fd, 1) < 0) {
close(fd);
return -1;
}
return fd;
}
static int connect_unix_client(const char *path)
{
struct sockaddr_un addr;
int fd;
fd = socket(PF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC | SOCK_NONBLOCK, 0);
if (fd < 0)
return -1;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
addr.sun_path[0] = '\0';
strcpy(addr.sun_path + 1, path);
if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(fd);
return -1;
}
return fd;
}
static void accept_callback(int fd, uint32_t events, void *user_data)
{
struct bt_amp *amp = user_data;
struct sockaddr_un addr;
socklen_t len;
int new_fd;
if (events & (EPOLLERR | EPOLLHUP)) {
mainloop_remove_fd(fd);
return;
}
memset(&addr, 0, sizeof(addr));
len = sizeof(addr);
new_fd = accept4(fd, (struct sockaddr *) &addr, &len,
SOCK_CLOEXEC | SOCK_NONBLOCK);
if (new_fd < 0)
return;
mainloop_remove_fd(fd);
close(fd);
amp->phylink_fd = new_fd;
evt_phy_link_complete(amp);
mainloop_add_fd(new_fd, EPOLLIN, link_callback, amp, NULL);
}
static void connect_callback(int fd, uint32_t events, void *user_data)
{
struct bt_amp *amp = user_data;
if (events & (EPOLLERR | EPOLLHUP)) {
mainloop_remove_fd(fd);
return;
}
mainloop_remove_fd(fd);
evt_phy_link_complete(amp);
mainloop_add_fd(fd, EPOLLIN, link_callback, amp, NULL);
}
static void cmd_write_remote_amp_assoc(struct bt_amp *amp,
const void *data, uint8_t size)
{
const struct bt_hci_cmd_write_remote_amp_assoc *cmd = data;
struct bt_hci_rsp_write_remote_amp_assoc rsp;
int fd;
if (cmd->phy_handle == 0x00) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC);
return;
}
if (cmd->phy_handle != amp->phy_handle) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS,
BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC);
return;
}
switch (amp->phy_mode) {
case PHY_MODE_INITIATOR:
strcpy(amp->phylink_path, "amp");
fd = create_unix_server(amp->phylink_path);
if (fd < 0) {
cmd_status(amp, BT_HCI_ERR_UNSPECIFIED_ERROR,
BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC);
return;
}
amp->local_assoc[0] = 0x01;
memcpy(amp->local_assoc + 1, amp->phylink_path,
strlen(amp->phylink_path) + 1);
amp->local_assoc_len = strlen(amp->phylink_path) + 2;
mainloop_add_fd(fd, EPOLLIN, accept_callback, amp, NULL);
amp->phylink_fd = fd;
break;
case PHY_MODE_ACCEPTOR:
if (cmd->assoc_fragment[0] != 0x01) {
cmd_status(amp, BT_HCI_ERR_UNSPECIFIED_ERROR,
BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC);
return;
}
memcpy(amp->phylink_path, cmd->assoc_fragment + 1,
cmd->remain_assoc_len - 1);
fd = connect_unix_client(amp->phylink_path);
if (fd < 0) {
cmd_status(amp, BT_HCI_ERR_UNSPECIFIED_ERROR,
BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC);
return;
}
mainloop_add_fd(fd, EPOLLOUT, connect_callback, amp, NULL);
amp->phylink_fd = fd;
break;
default:
cmd_status(amp, BT_HCI_ERR_COMMAND_DISALLOWED,
BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC);
return;
}
rsp.status = BT_HCI_ERR_SUCCESS;
rsp.phy_handle = amp->phy_handle;
cmd_complete(amp, BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC, &rsp, sizeof(rsp));
if (amp->phy_mode == PHY_MODE_INITIATOR) {
struct bt_hci_evt_channel_selected evt;
evt.phy_handle = amp->phy_handle;
send_event(amp, BT_HCI_EVT_CHANNEL_SELECTED, &evt, sizeof(evt));
}
}
static const struct {
uint16_t opcode;
void (*func) (struct bt_amp *amp, const void *data, uint8_t size);
uint8_t size;
bool fixed;
} cmd_table[] = {
{ BT_HCI_CMD_SET_EVENT_MASK, cmd_set_event_mask, 8, true },
{ BT_HCI_CMD_RESET, cmd_reset, 0, true },
{ BT_HCI_CMD_READ_LOCAL_VERSION, cmd_read_local_version, 0, true },
{ BT_HCI_CMD_READ_LOCAL_COMMANDS, cmd_read_local_commands, 0, true },
{ BT_HCI_CMD_READ_LOCAL_FEATURES, cmd_read_local_features, 0, true },
{ BT_HCI_CMD_READ_BUFFER_SIZE, cmd_read_buffer_size, 0, true },
{ BT_HCI_CMD_CREATE_PHY_LINK,
cmd_create_phy_link, 3, false },
{ BT_HCI_CMD_ACCEPT_PHY_LINK,
cmd_accept_phy_link, 3, false },
{ BT_HCI_CMD_DISCONN_PHY_LINK,
cmd_disconn_phy_link, 2, true },
{ BT_HCI_CMD_CREATE_LOGIC_LINK,
cmd_create_logic_link, 33, true },
{ BT_HCI_CMD_ACCEPT_LOGIC_LINK,
cmd_accept_logic_link, 33, true },
{ BT_HCI_CMD_DISCONN_LOGIC_LINK,
cmd_disconn_logic_link, 2, true },
{ BT_HCI_CMD_LOGIC_LINK_CANCEL,
cmd_logic_link_cancel, 2, true },
{ BT_HCI_CMD_SET_EVENT_MASK_PAGE2,
cmd_set_event_mask_page2, 8, true },
{ BT_HCI_CMD_READ_LOCATION_DATA,
cmd_read_location_data, 0, true },
{ BT_HCI_CMD_WRITE_LOCATION_DATA,
cmd_write_location_data, 5, true },
{ BT_HCI_CMD_READ_FLOW_CONTROL_MODE,
cmd_read_flow_control_mode, 0, true },
{ BT_HCI_CMD_WRITE_FLOW_CONTROL_MODE,
cmd_write_flow_control_mode, 1, true },
{ BT_HCI_CMD_READ_DATA_BLOCK_SIZE,
cmd_read_data_block_size, 0, true },
{ BT_HCI_CMD_READ_LOCAL_AMP_INFO,
cmd_read_local_amp_info, 0, true },
{ BT_HCI_CMD_READ_LOCAL_AMP_ASSOC,
cmd_read_local_amp_assoc, 5, true },
{ BT_HCI_CMD_WRITE_REMOTE_AMP_ASSOC,
cmd_write_remote_amp_assoc, 6, false },
{ }
};
static void process_command(struct bt_amp *amp, const void *data, size_t size)
{
const struct bt_hci_cmd_hdr *hdr = data;
uint16_t opcode;
unsigned int i;
if (size < sizeof(*hdr))
return;
data += sizeof(*hdr);
size -= sizeof(*hdr);
opcode = le16_to_cpu(hdr->opcode);
if (hdr->plen != size) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS, opcode);
return;
}
for (i = 0; cmd_table[i].func; i++) {
if (cmd_table[i].opcode != opcode)
continue;
if ((cmd_table[i].fixed && size != cmd_table[i].size) ||
size < cmd_table[i].size) {
cmd_status(amp, BT_HCI_ERR_INVALID_PARAMETERS, opcode);
return;
}
cmd_table[i].func(amp, data, size);
return;
}
cmd_status(amp, BT_HCI_ERR_UNKNOWN_COMMAND, opcode);
}
static void vhci_read_callback(int fd, uint32_t events, void *user_data)
{
struct bt_amp *amp = user_data;
unsigned char buf[4096];
ssize_t len;
if (events & (EPOLLERR | EPOLLHUP))
return;
len = read(amp->vhci_fd, buf, sizeof(buf));
if (len < 1)
return;
switch (buf[0]) {
case BT_H4_CMD_PKT:
process_command(amp, buf + 1, len - 1);
break;
}
}
struct bt_amp *bt_amp_new(void)
{
unsigned char setup_cmd[2];
struct bt_amp *amp;
amp = calloc(1, sizeof(*amp));
if (!amp)
return NULL;
reset_defaults(amp);
amp->vhci_fd = open("/dev/vhci", O_RDWR);
if (amp->vhci_fd < 0) {
free(amp);
return NULL;
}
setup_cmd[0] = HCI_VENDOR_PKT;
setup_cmd[1] = HCI_AMP;
if (write(amp->vhci_fd, setup_cmd, sizeof(setup_cmd)) < 0) {
close(amp->vhci_fd);
free(amp);
return NULL;
}
mainloop_add_fd(amp->vhci_fd, EPOLLIN, vhci_read_callback, amp, NULL);
return bt_amp_ref(amp);
}
struct bt_amp *bt_amp_ref(struct bt_amp *amp)
{
if (!amp)
return NULL;
__sync_fetch_and_add(&amp->ref_count, 1);
return amp;
}
void bt_amp_unref(struct bt_amp *amp)
{
if (!amp)
return;
if (__sync_sub_and_fetch(&amp->ref_count, 1))
return;
mainloop_remove_fd(amp->vhci_fd);
close(amp->vhci_fd);
free(amp);
}
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