/**
* Set the scan response data that the controller will send.
*
* @param cmd
* @param len
*
* @return int
*/
int
ble_ll_adv_set_scan_rsp_data(uint8_t *cmd, uint8_t len)
{
uint8_t datalen;
os_sr_t sr;
struct ble_ll_adv_sm *advsm;
/* Check for valid scan response data length */
datalen = cmd[0];
if (datalen > BLE_SCAN_RSP_DATA_MAX_LEN) {
return BLE_ERR_INV_HCI_CMD_PARMS;
}
/* Copy the new data into the advertising structure. */
advsm = &g_ble_ll_adv_sm;
advsm->scan_rsp_len = datalen;
memcpy(advsm->scan_rsp_data, cmd + 1, datalen);
/* Re-make the scan response PDU since data may have changed */
OS_ENTER_CRITICAL(sr);
/*
* XXX: there is a chance, even with interrupts disabled, that
* we are transmitting the scan response PDU while writing to it.
*/
ble_ll_adv_scan_rsp_pdu_make(advsm);
OS_EXIT_CRITICAL(sr);
return 0;
}
/**
* Start the advertising state machine. This is called when the host sends
* the "enable advertising" command and is not called again while in the
* advertising state.
*
* Context: Link-layer task.
*
* @param advsm Pointer to advertising state machine
*
* @return int
*/
static int
ble_ll_adv_sm_start(struct ble_ll_adv_sm *advsm)
{
uint8_t adv_chan;
/*
* This is not in the specification. I will reject the command with a
* command disallowed error if no random address has been sent by the
* host. All the parameter errors refer to the command
* parameter (which in this case is just enable or disable) so that
* is why I chose command disallowed.
*/
if (advsm->own_addr_type == BLE_HCI_ADV_OWN_ADDR_RANDOM) {
if (!ble_ll_is_valid_random_addr(g_random_addr)) {
return BLE_ERR_CMD_DISALLOWED;
}
}
/* Set flag telling us that advertising is enabled */
advsm->enabled = 1;
/* Determine the advertising interval we will use */
if (advsm->adv_type == BLE_HCI_ADV_TYPE_ADV_DIRECT_IND_HD) {
/* Set it to max. allowed for high duty cycle advertising */
advsm->adv_itvl_usecs = BLE_LL_ADV_PDU_ITVL_HD_MS_MAX;
} else {
advsm->adv_itvl_usecs = (uint32_t)advsm->adv_itvl_max;
advsm->adv_itvl_usecs *= BLE_LL_ADV_ITVL;
}
/* Create scan response PDU (if needed) */
if (advsm->adv_type != BLE_HCI_ADV_TYPE_ADV_NONCONN_IND) {
ble_ll_adv_scan_rsp_pdu_make(advsm);
}
/* Set first advertising channel */
adv_chan = ble_ll_adv_first_chan(advsm);
advsm->adv_chan = adv_chan;
/*
* Schedule advertising. We set the initial schedule start and end
* times to the earliest possible start/end.
*/
ble_ll_adv_set_sched(advsm, 1);
ble_ll_sched_adv_new(&advsm->adv_sch);
return BLE_ERR_SUCCESS;
}
/**
* Called when the LL receives a scan request or connection request
*
* Context: Called from interrupt context.
*
* @param rxbuf
*
* @return -1: request not for us or is a connect request.
* 0: request (scan) is for us and we successfully went from rx to tx.
* > 0: PHY error attempting to go from rx to tx.
*/
static int
ble_ll_adv_rx_req(uint8_t pdu_type, struct os_mbuf *rxpdu)
{
int rc;
int resolved;
uint8_t chk_wl;
uint8_t txadd;
uint8_t peer_addr_type;
uint8_t *rxbuf;
uint8_t *adva;
uint8_t *peer;
struct ble_mbuf_hdr *ble_hdr;
struct ble_ll_adv_sm *advsm;
struct os_mbuf *scan_rsp;
/* See if adva in the request (scan or connect) matches what we sent */
advsm = &g_ble_ll_adv_sm;
rxbuf = rxpdu->om_data;
adva = rxbuf + BLE_LL_PDU_HDR_LEN + BLE_DEV_ADDR_LEN;
if (memcmp(advsm->adva, adva, BLE_DEV_ADDR_LEN)) {
return -1;
}
/* Set device match bit if we are whitelisting */
if (pdu_type == BLE_ADV_PDU_TYPE_SCAN_REQ) {
chk_wl = advsm->adv_filter_policy & 1;
} else {
chk_wl = advsm->adv_filter_policy & 2;
}
/* Get the peer address type */
if (rxbuf[0] & BLE_ADV_PDU_HDR_TXADD_MASK) {
txadd = BLE_ADDR_TYPE_RANDOM;
} else {
txadd = BLE_ADDR_TYPE_PUBLIC;
}
ble_hdr = BLE_MBUF_HDR_PTR(rxpdu);
peer = rxbuf + BLE_LL_PDU_HDR_LEN;
peer_addr_type = txadd;
resolved = 0;
#if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LL_PRIVACY) == 1)
if (ble_ll_is_rpa(peer, txadd) && ble_ll_resolv_enabled()) {
advsm->adv_rpa_index = ble_hw_resolv_list_match();
if (advsm->adv_rpa_index >= 0) {
ble_hdr->rxinfo.flags |= BLE_MBUF_HDR_F_RESOLVED;
if (chk_wl) {
peer = g_ble_ll_resolv_list[advsm->adv_rpa_index].rl_identity_addr;
peer_addr_type = g_ble_ll_resolv_list[advsm->adv_rpa_index].rl_addr_type;
resolved = 1;
}
} else {
if (chk_wl) {
return -1;
}
}
}
#endif
/* Set device match bit if we are whitelisting */
if (chk_wl && !ble_ll_whitelist_match(peer, peer_addr_type, resolved)) {
return -1;
}
/*
* We set the device match bit to tell the upper layer that we will
* accept the request
*/
ble_hdr->rxinfo.flags |= BLE_MBUF_HDR_F_DEVMATCH;
/* Setup to transmit the scan response if appropriate */
rc = -1;
if (pdu_type == BLE_ADV_PDU_TYPE_SCAN_REQ) {
scan_rsp = ble_ll_adv_scan_rsp_pdu_make(advsm);
if (scan_rsp) {
ble_phy_set_txend_cb(ble_ll_adv_tx_done, &g_ble_ll_adv_sm);
rc = ble_phy_tx(scan_rsp, BLE_PHY_TRANSITION_NONE);
if (!rc) {
ble_hdr->rxinfo.flags |= BLE_MBUF_HDR_F_SCAN_RSP_TXD;
STATS_INC(ble_ll_stats, scan_rsp_txg);
}
os_mbuf_free_chain(scan_rsp);
}
}
return rc;
}
