708 lines
14 KiB
C
708 lines
14 KiB
C
/* hfp_hf.c - Hands free Profile - Handsfree side handling */
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/*
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* Copyright (c) 2015-2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <errno.h>
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#include <sys/atomic.h>
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#include <sys/byteorder.h>
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#include <sys/util.h>
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#include <sys/printk.h>
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#include <bluetooth/conn.h>
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#define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HFP_HF)
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#define LOG_MODULE_NAME bt_hfp_hf
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#include "common/log.h"
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#include <bluetooth/rfcomm.h>
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#include <bluetooth/hfp_hf.h>
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#include "hci_core.h"
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#include "conn_internal.h"
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#include "l2cap_internal.h"
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#include "rfcomm_internal.h"
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#include "at.h"
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#include "hfp_internal.h"
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#define MAX_IND_STR_LEN 17
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struct bt_hfp_hf_cb *bt_hf;
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NET_BUF_POOL_FIXED_DEFINE(hf_pool, CONFIG_BT_MAX_CONN + 1,
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BT_RFCOMM_BUF_SIZE(BT_HF_CLIENT_MAX_PDU), NULL);
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static struct bt_hfp_hf bt_hfp_hf_pool[CONFIG_BT_MAX_CONN];
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/* The order should follow the enum hfp_hf_ag_indicators */
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static const struct {
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char *name;
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uint32_t min;
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uint32_t max;
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} ag_ind[] = {
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{"service", 0, 1}, /* HF_SERVICE_IND */
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{"call", 0, 1}, /* HF_CALL_IND */
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{"callsetup", 0, 3}, /* HF_CALL_SETUP_IND */
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{"callheld", 0, 2}, /* HF_CALL_HELD_IND */
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{"signal", 0, 5}, /* HF_SINGNAL_IND */
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{"roam", 0, 1}, /* HF_ROAM_IND */
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{"battchg", 0, 5} /* HF_BATTERY_IND */
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};
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void hf_slc_error(struct at_client *hf_at)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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int err;
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BT_ERR("SLC error: disconnecting");
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err = bt_rfcomm_dlc_disconnect(&hf->rfcomm_dlc);
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if (err) {
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BT_ERR("Rfcomm: Unable to disconnect :%d", -err);
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}
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}
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int hfp_hf_send_cmd(struct bt_hfp_hf *hf, at_resp_cb_t resp,
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at_finish_cb_t finish, const char *format, ...)
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{
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struct net_buf *buf;
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va_list vargs;
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int ret;
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/* register the callbacks */
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at_register(&hf->at, resp, finish);
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buf = bt_rfcomm_create_pdu(&hf_pool);
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if (!buf) {
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BT_ERR("No Buffers!");
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return -ENOMEM;
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}
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va_start(vargs, format);
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ret = vsnprintk(buf->data, (net_buf_tailroom(buf) - 1), format, vargs);
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if (ret < 0) {
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BT_ERR("Unable to format variable arguments");
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return ret;
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}
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va_end(vargs);
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net_buf_add(buf, ret);
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net_buf_add_u8(buf, '\r');
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ret = bt_rfcomm_dlc_send(&hf->rfcomm_dlc, buf);
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if (ret < 0) {
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BT_ERR("Rfcomm send error :(%d)", ret);
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return ret;
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}
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return 0;
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}
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int brsf_handle(struct at_client *hf_at)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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uint32_t val;
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int ret;
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ret = at_get_number(hf_at, &val);
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if (ret < 0) {
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BT_ERR("Error getting value");
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return ret;
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}
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hf->ag_features = val;
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return 0;
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}
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int brsf_resp(struct at_client *hf_at, struct net_buf *buf)
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{
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int err;
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BT_DBG("");
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err = at_parse_cmd_input(hf_at, buf, "BRSF", brsf_handle,
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AT_CMD_TYPE_NORMAL);
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if (err < 0) {
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/* Returning negative value is avoided before SLC connection
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* established.
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*/
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BT_ERR("Error parsing CMD input");
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hf_slc_error(hf_at);
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}
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return 0;
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}
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static void cind_handle_values(struct at_client *hf_at, uint32_t index,
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char *name, uint32_t min, uint32_t max)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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int i;
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BT_DBG("index: %u, name: %s, min: %u, max:%u", index, name, min, max);
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for (i = 0; i < ARRAY_SIZE(ag_ind); i++) {
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if (strcmp(name, ag_ind[i].name) != 0) {
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continue;
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}
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if (min != ag_ind[i].min || max != ag_ind[i].max) {
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BT_ERR("%s indicator min/max value not matching", name);
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}
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hf->ind_table[index] = i;
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break;
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}
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}
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int cind_handle(struct at_client *hf_at)
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{
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uint32_t index = 0U;
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/* Parsing Example: CIND: ("call",(0,1)) etc.. */
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while (at_has_next_list(hf_at)) {
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char name[MAX_IND_STR_LEN];
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uint32_t min, max;
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if (at_open_list(hf_at) < 0) {
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BT_ERR("Could not get open list");
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goto error;
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}
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if (at_list_get_string(hf_at, name, sizeof(name)) < 0) {
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BT_ERR("Could not get string");
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goto error;
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}
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if (at_open_list(hf_at) < 0) {
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BT_ERR("Could not get open list");
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goto error;
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}
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if (at_list_get_range(hf_at, &min, &max) < 0) {
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BT_ERR("Could not get range");
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goto error;
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}
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if (at_close_list(hf_at) < 0) {
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BT_ERR("Could not get close list");
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goto error;
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}
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if (at_close_list(hf_at) < 0) {
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BT_ERR("Could not get close list");
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goto error;
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}
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cind_handle_values(hf_at, index, name, min, max);
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index++;
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}
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return 0;
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error:
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BT_ERR("Error on CIND response");
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hf_slc_error(hf_at);
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return -EINVAL;
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}
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int cind_resp(struct at_client *hf_at, struct net_buf *buf)
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{
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int err;
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err = at_parse_cmd_input(hf_at, buf, "CIND", cind_handle,
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AT_CMD_TYPE_NORMAL);
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if (err < 0) {
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BT_ERR("Error parsing CMD input");
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hf_slc_error(hf_at);
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}
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return 0;
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}
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void ag_indicator_handle_values(struct at_client *hf_at, uint32_t index,
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uint32_t value)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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struct bt_conn *conn = hf->rfcomm_dlc.session->br_chan.chan.conn;
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BT_DBG("Index :%u, Value :%u", index, value);
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if (index >= ARRAY_SIZE(ag_ind)) {
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BT_ERR("Max only %lu indicators are supported",
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ARRAY_SIZE(ag_ind));
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return;
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}
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if (value > ag_ind[hf->ind_table[index]].max ||
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value < ag_ind[hf->ind_table[index]].min) {
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BT_ERR("Indicators out of range - value: %u", value);
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return;
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}
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switch (hf->ind_table[index]) {
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case HF_SERVICE_IND:
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if (bt_hf->service) {
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bt_hf->service(conn, value);
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}
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break;
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case HF_CALL_IND:
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if (bt_hf->call) {
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bt_hf->call(conn, value);
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}
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break;
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case HF_CALL_SETUP_IND:
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if (bt_hf->call_setup) {
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bt_hf->call_setup(conn, value);
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}
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break;
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case HF_CALL_HELD_IND:
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if (bt_hf->call_held) {
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bt_hf->call_held(conn, value);
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}
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break;
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case HF_SINGNAL_IND:
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if (bt_hf->signal) {
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bt_hf->signal(conn, value);
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}
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break;
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case HF_ROAM_IND:
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if (bt_hf->roam) {
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bt_hf->roam(conn, value);
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}
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break;
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case HF_BATTERY_IND:
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if (bt_hf->battery) {
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bt_hf->battery(conn, value);
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}
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break;
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default:
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BT_ERR("Unknown AG indicator");
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break;
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}
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}
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int cind_status_handle(struct at_client *hf_at)
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{
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uint32_t index = 0U;
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while (at_has_next_list(hf_at)) {
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uint32_t value;
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int ret;
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ret = at_get_number(hf_at, &value);
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if (ret < 0) {
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BT_ERR("could not get the value");
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return ret;
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}
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ag_indicator_handle_values(hf_at, index, value);
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index++;
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}
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return 0;
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}
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int cind_status_resp(struct at_client *hf_at, struct net_buf *buf)
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{
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int err;
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err = at_parse_cmd_input(hf_at, buf, "CIND", cind_status_handle,
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AT_CMD_TYPE_NORMAL);
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if (err < 0) {
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BT_ERR("Error parsing CMD input");
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hf_slc_error(hf_at);
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}
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return 0;
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}
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int ciev_handle(struct at_client *hf_at)
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{
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uint32_t index, value;
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int ret;
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ret = at_get_number(hf_at, &index);
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if (ret < 0) {
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BT_ERR("could not get the Index");
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return ret;
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}
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/* The first element of the list shall have 1 */
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if (!index) {
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BT_ERR("Invalid index value '0'");
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return 0;
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}
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ret = at_get_number(hf_at, &value);
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if (ret < 0) {
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BT_ERR("could not get the value");
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return ret;
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}
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ag_indicator_handle_values(hf_at, (index - 1), value);
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return 0;
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}
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int ring_handle(struct at_client *hf_at)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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struct bt_conn *conn = hf->rfcomm_dlc.session->br_chan.chan.conn;
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if (bt_hf->ring_indication) {
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bt_hf->ring_indication(conn);
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}
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return 0;
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}
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static const struct unsolicited {
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const char *cmd;
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enum at_cmd_type type;
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int (*func)(struct at_client *hf_at);
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} handlers[] = {
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{ "CIEV", AT_CMD_TYPE_UNSOLICITED, ciev_handle },
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{ "RING", AT_CMD_TYPE_OTHER, ring_handle }
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};
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static const struct unsolicited *hfp_hf_unsol_lookup(struct at_client *hf_at)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(handlers); i++) {
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if (!strncmp(hf_at->buf, handlers[i].cmd,
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strlen(handlers[i].cmd))) {
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return &handlers[i];
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}
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}
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return NULL;
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}
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int unsolicited_cb(struct at_client *hf_at, struct net_buf *buf)
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{
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const struct unsolicited *handler;
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handler = hfp_hf_unsol_lookup(hf_at);
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if (!handler) {
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BT_ERR("Unhandled unsolicited response");
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return -ENOMSG;
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}
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if (!at_parse_cmd_input(hf_at, buf, handler->cmd, handler->func,
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handler->type)) {
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return 0;
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}
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return -ENOMSG;
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}
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int cmd_complete(struct at_client *hf_at, enum at_result result,
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enum at_cme cme_err)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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struct bt_conn *conn = hf->rfcomm_dlc.session->br_chan.chan.conn;
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struct bt_hfp_hf_cmd_complete cmd = { 0 };
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BT_DBG("");
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switch (result) {
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case AT_RESULT_OK:
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cmd.type = HFP_HF_CMD_OK;
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break;
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case AT_RESULT_ERROR:
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cmd.type = HFP_HF_CMD_ERROR;
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break;
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case AT_RESULT_CME_ERROR:
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cmd.type = HFP_HF_CMD_CME_ERROR;
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cmd.cme = cme_err;
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break;
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default:
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BT_ERR("Unknown error code");
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cmd.type = HFP_HF_CMD_UNKNOWN_ERROR;
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break;
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}
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if (bt_hf->cmd_complete_cb) {
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bt_hf->cmd_complete_cb(conn, &cmd);
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}
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return 0;
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}
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int cmee_finish(struct at_client *hf_at, enum at_result result,
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enum at_cme cme_err)
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{
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if (result != AT_RESULT_OK) {
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BT_ERR("SLC Connection ERROR in response");
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return -EINVAL;
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}
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return 0;
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}
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static void slc_completed(struct at_client *hf_at)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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struct bt_conn *conn = hf->rfcomm_dlc.session->br_chan.chan.conn;
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if (bt_hf->connected) {
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bt_hf->connected(conn);
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}
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if (hfp_hf_send_cmd(hf, NULL, cmee_finish, "AT+CMEE=1") < 0) {
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BT_ERR("Error Sending AT+CMEE");
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}
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}
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int cmer_finish(struct at_client *hf_at, enum at_result result,
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enum at_cme cme_err)
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{
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if (result != AT_RESULT_OK) {
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BT_ERR("SLC Connection ERROR in response");
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hf_slc_error(hf_at);
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return -EINVAL;
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}
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slc_completed(hf_at);
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return 0;
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}
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int cind_status_finish(struct at_client *hf_at, enum at_result result,
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enum at_cme cme_err)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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int err;
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if (result != AT_RESULT_OK) {
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BT_ERR("SLC Connection ERROR in response");
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hf_slc_error(hf_at);
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return -EINVAL;
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}
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at_register_unsolicited(hf_at, unsolicited_cb);
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err = hfp_hf_send_cmd(hf, NULL, cmer_finish, "AT+CMER=3,0,0,1");
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if (err < 0) {
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hf_slc_error(hf_at);
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return err;
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}
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return 0;
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}
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int cind_finish(struct at_client *hf_at, enum at_result result,
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enum at_cme cme_err)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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int err;
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if (result != AT_RESULT_OK) {
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BT_ERR("SLC Connection ERROR in response");
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hf_slc_error(hf_at);
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return -EINVAL;
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}
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err = hfp_hf_send_cmd(hf, cind_status_resp, cind_status_finish,
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"AT+CIND?");
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if (err < 0) {
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hf_slc_error(hf_at);
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return err;
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}
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return 0;
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}
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int brsf_finish(struct at_client *hf_at, enum at_result result,
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enum at_cme cme_err)
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{
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struct bt_hfp_hf *hf = CONTAINER_OF(hf_at, struct bt_hfp_hf, at);
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int err;
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if (result != AT_RESULT_OK) {
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BT_ERR("SLC Connection ERROR in response");
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hf_slc_error(hf_at);
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return -EINVAL;
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}
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err = hfp_hf_send_cmd(hf, cind_resp, cind_finish, "AT+CIND=?");
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if (err < 0) {
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hf_slc_error(hf_at);
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return err;
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}
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return 0;
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}
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int hf_slc_establish(struct bt_hfp_hf *hf)
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{
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int err;
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BT_DBG("");
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err = hfp_hf_send_cmd(hf, brsf_resp, brsf_finish, "AT+BRSF=%u",
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hf->hf_features);
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|
if (err < 0) {
|
|
hf_slc_error(&hf->at);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct bt_hfp_hf *bt_hfp_hf_lookup_bt_conn(struct bt_conn *conn)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(bt_hfp_hf_pool); i++) {
|
|
struct bt_hfp_hf *hf = &bt_hfp_hf_pool[i];
|
|
|
|
if (hf->rfcomm_dlc.session->br_chan.chan.conn == conn) {
|
|
return hf;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int bt_hfp_hf_send_cmd(struct bt_conn *conn, enum bt_hfp_hf_at_cmd cmd)
|
|
{
|
|
struct bt_hfp_hf *hf;
|
|
int err;
|
|
|
|
BT_DBG("");
|
|
|
|
if (!conn) {
|
|
BT_ERR("Invalid connection");
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
hf = bt_hfp_hf_lookup_bt_conn(conn);
|
|
if (!hf) {
|
|
BT_ERR("No HF connection found");
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case BT_HFP_HF_ATA:
|
|
err = hfp_hf_send_cmd(hf, NULL, cmd_complete, "ATA");
|
|
if (err < 0) {
|
|
BT_ERR("Failed ATA");
|
|
return err;
|
|
}
|
|
break;
|
|
case BT_HFP_HF_AT_CHUP:
|
|
err = hfp_hf_send_cmd(hf, NULL, cmd_complete, "AT+CHUP");
|
|
if (err < 0) {
|
|
BT_ERR("Failed AT+CHUP");
|
|
return err;
|
|
}
|
|
break;
|
|
default:
|
|
BT_ERR("Invalid AT Command");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void hfp_hf_connected(struct bt_rfcomm_dlc *dlc)
|
|
{
|
|
struct bt_hfp_hf *hf = CONTAINER_OF(dlc, struct bt_hfp_hf, rfcomm_dlc);
|
|
|
|
BT_DBG("hf connected");
|
|
|
|
BT_ASSERT(hf);
|
|
hf_slc_establish(hf);
|
|
}
|
|
|
|
static void hfp_hf_disconnected(struct bt_rfcomm_dlc *dlc)
|
|
{
|
|
struct bt_conn *conn = dlc->session->br_chan.chan.conn;
|
|
|
|
BT_DBG("hf disconnected!");
|
|
if (bt_hf->disconnected) {
|
|
bt_hf->disconnected(conn);
|
|
}
|
|
}
|
|
|
|
static void hfp_hf_recv(struct bt_rfcomm_dlc *dlc, struct net_buf *buf)
|
|
{
|
|
struct bt_hfp_hf *hf = CONTAINER_OF(dlc, struct bt_hfp_hf, rfcomm_dlc);
|
|
|
|
if (at_parse_input(&hf->at, buf) < 0) {
|
|
BT_ERR("Parsing failed");
|
|
}
|
|
}
|
|
|
|
static int bt_hfp_hf_accept(struct bt_conn *conn, struct bt_rfcomm_dlc **dlc)
|
|
{
|
|
int i;
|
|
static struct bt_rfcomm_dlc_ops ops = {
|
|
.connected = hfp_hf_connected,
|
|
.disconnected = hfp_hf_disconnected,
|
|
.recv = hfp_hf_recv,
|
|
};
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(bt_hfp_hf_pool); i++) {
|
|
struct bt_hfp_hf *hf = &bt_hfp_hf_pool[i];
|
|
int j;
|
|
|
|
if (hf->rfcomm_dlc.session) {
|
|
continue;
|
|
}
|
|
|
|
hf->at.buf = hf->hf_buffer;
|
|
hf->at.buf_max_len = HF_MAX_BUF_LEN;
|
|
|
|
hf->rfcomm_dlc.ops = &ops;
|
|
hf->rfcomm_dlc.mtu = BT_HFP_MAX_MTU;
|
|
|
|
*dlc = &hf->rfcomm_dlc;
|
|
|
|
/* Set the supported features*/
|
|
hf->hf_features = BT_HFP_HF_SUPPORTED_FEATURES;
|
|
|
|
for (j = 0; j < HF_MAX_AG_INDICATORS; j++) {
|
|
hf->ind_table[j] = -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
BT_ERR("Unable to establish HF connection (%p)", conn);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void hfp_hf_init(void)
|
|
{
|
|
static struct bt_rfcomm_server chan = {
|
|
.channel = BT_RFCOMM_CHAN_HFP_HF,
|
|
.accept = bt_hfp_hf_accept,
|
|
};
|
|
|
|
bt_rfcomm_server_register(&chan);
|
|
}
|
|
|
|
int bt_hfp_hf_register(struct bt_hfp_hf_cb *cb)
|
|
{
|
|
if (!cb) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bt_hf) {
|
|
return -EALREADY;
|
|
}
|
|
|
|
bt_hf = cb;
|
|
|
|
hfp_hf_init();
|
|
|
|
return 0;
|
|
}
|