/**************************************************************************** * wireless/ieee802154/mac802154_assoc.c * * Copyright (C) 2017 Verge Inc. All rights reserved. * Author: Anthony Merlino * * 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. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "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 THE * COPYRIGHT OWNER OR CONTRIBUTORS 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. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include "mac802154.h" #include "mac802154_internal.h" #include "mac802154_assoc.h" #include /**************************************************************************** * Private Function Prototypes ****************************************************************************/ static void mac802154_timeout_assoc(FAR struct ieee802154_privmac_s *priv); /**************************************************************************** * Public MAC Functions ****************************************************************************/ /**************************************************************************** * Name: mac802154_req_associate * * Description: * The MLME-ASSOCIATE.request primitive allows a device to request an * association with a coordinator. Confirmation is returned via the * struct mac802154_maccb_s->conf_associate callback. * * On receipt of the MLME-ASSOCIATE.request primitive, the MLME of an * unassociated device first updates the appropriate PHY and MAC PIB * attributes, as described in 5.1.3.1, and then generates an association * request command, as defined in 5.3.1 [1] pg.80 * ****************************************************************************/ int mac802154_req_associate(MACHANDLE mac, FAR struct ieee802154_assoc_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; FAR struct ieee802154_txdesc_s *txdesc; FAR struct iob_s *iob; bool rxonidle; int ret; if (req->coordaddr.mode == IEEE802154_ADDRMODE_NONE) { return -EINVAL; } /* Get exlusive access to the operation sempaphore. This must happen before * getting exclusive access to the MAC struct or else there could be a lockup * condition. This would occur if another thread is using the cmdtrans but * needs access to the MAC in order to unlock it. */ ret = mac802154_takesem(&priv->op_sem, true); if (ret < 0) { return ret; } priv->curr_op = MAC802154_OP_ASSOC; priv->curr_cmd = IEEE802154_CMD_ASSOC_REQ; /* Get exclusive access to the MAC */ ret = mac802154_takesem(&priv->exclsem, true); if (ret < 0) { mac802154_givesem(&priv->op_sem); return ret; } /* Set the channel and channel page of the PHY layer */ priv->radio->set_attr(priv->radio, IEEE802154_ATTR_PHY_CURRENT_CHANNEL, (FAR const union ieee802154_attr_u *)&req->chnum); priv->radio->set_attr(priv->radio, IEEE802154_ATTR_PHY_CURRENT_PAGE, (FAR const union ieee802154_attr_u *)&req->chpage); /* Set the coordinator address attributes */ memcpy(&priv->coordaddr, &req->coordaddr, sizeof(struct ieee802154_addr_s)); /* Copy the coordinator PAN ID to our PAN ID */ IEEE802154_PANIDCOPY(priv->addr.panid, req->coordaddr.panid); priv->radio->set_attr(priv->radio, IEEE802154_ATTR_MAC_PANID, (FAR const union ieee802154_attr_u *)req->coordaddr.panid); /* Copy in the capabilities information bitfield */ priv->devmode = (req->capabilities.devtype) ? IEEE802154_DEVMODE_COORD : IEEE802154_DEVMODE_ENDPOINT; /* Unlike other attributes, we can't simply cast this one since it is a bit * in a bitfield. Casting it will give us unpredicatble results. Instead * of creating a ieee802154_attr_u, we use a local bool. Allocating the * ieee802154_attr_u value would take up more room on the stack since it is * as large as the largest attribute type. */ rxonidle = req->capabilities.rxonidle; priv->radio->set_attr(priv->radio, IEEE802154_ATTR_MAC_RX_ON_WHEN_IDLE, (FAR const union ieee802154_attr_u *)&rxonidle); /* Allocate an IOB to put the frame in */ iob = iob_alloc(false); DEBUGASSERT(iob != NULL); iob->io_flink = NULL; iob->io_len = 0; iob->io_offset = 0; iob->io_pktlen = 0; /* Allocate the txdesc, waiting if necessary */ ret = mac802154_txdesc_alloc(priv, &txdesc, true); if (ret < 0) { iob_free(iob); mac802154_givesem(&priv->exclsem); mac802154_givesem(&priv->op_sem); return ret; } /* Get a uin16_t reference to the first two bytes. ie frame control field */ iob->io_data[0] = 0; iob->io_data[1] = 0; IEEE802154_SETACKREQ(iob->io_data, 0); IEEE802154_SETFTYPE(iob->io_data, 0, IEEE802154_FRAME_COMMAND); IEEE802154_SETDADDRMODE(iob->io_data, 0, priv->coordaddr.mode); IEEE802154_SETSADDRMODE(iob->io_data, 0, IEEE802154_ADDRMODE_EXTENDED); iob->io_len = 2; /* Each time a data or a MAC command frame is generated, the MAC sublayer * shall copy the value of macDSN into the Sequence Number field of the MHR * of the outgoing frame and then increment it by one. [1] pg. 40. */ iob->io_data[iob->io_len++] = priv->dsn++; /* The Destination PAN Identifier field shall contain the identifier of the * PAN to which to associate. [1] pg. 68 */ mac802154_putpanid(iob, priv->coordaddr.panid); /* The Destination Address field shall contain the address from the beacon * frame that was transmitted by the coordinator to which the association * request command is being sent. [1] pg. 68 */ if (priv->coordaddr.mode == IEEE802154_ADDRMODE_SHORT) { mac802154_putsaddr(iob, priv->coordaddr.saddr); } else if (priv->coordaddr.mode == IEEE802154_ADDRMODE_EXTENDED) { mac802154_puteaddr(iob, priv->coordaddr.eaddr); } /* The Source PAN Identifier field shall contain the broadcast PAN identifier.*/ mac802154_putsaddr(iob, &IEEE802154_SADDR_BCAST); /* The Source Address field shall contain the value of macExtendedAddress. */ mac802154_puteaddr(iob, priv->addr.eaddr); /* Copy in the Command Frame Identifier */ iob->io_data[iob->io_len++] = IEEE802154_CMD_ASSOC_REQ; /* Copy in the capability information bits */ iob->io_data[iob->io_len] = 0; iob->io_data[iob->io_len] |= (req->capabilities.devtype << IEEE802154_CAPABILITY_SHIFT_DEVTYPE); iob->io_data[iob->io_len] |= (req->capabilities.powersource << IEEE802154_CAPABILITY_SHIFT_PWRSRC); iob->io_data[iob->io_len] |= (req->capabilities.rxonidle << IEEE802154_CAPABILITY_SHIFT_RXONIDLE); iob->io_data[iob->io_len] |= (req->capabilities.security << IEEE802154_CAPABILITY_SHIFT_SECURITY); iob->io_data[iob->io_len] |= (req->capabilities.allocaddr << IEEE802154_CAPABILITY_SHIFT_ALLOCADDR); iob->io_len++; txdesc->frame = iob; txdesc->frametype = IEEE802154_FRAME_COMMAND; /* Save a copy of the destination addressing infromation into the tx descriptor. * We only do this for commands to help with handling their progession. */ memcpy(&txdesc->destaddr, &req->coordaddr, sizeof(struct ieee802154_addr_s)); /* Save a reference of the tx descriptor */ priv->cmd_desc = txdesc; /* We no longer need to have the MAC layer locked. */ mac802154_givesem(&priv->exclsem); /* Association Request commands get sent out immediately */ priv->radio->txdelayed(priv->radio, txdesc, 0); return OK; } /**************************************************************************** * Name: mac802154_resp_associate * * Description: * The MLME-ASSOCIATE.response primitive is used to initiate a response to * an MLME-ASSOCIATE.indication primitive. * ****************************************************************************/ int mac802154_resp_associate(MACHANDLE mac, FAR struct ieee802154_assoc_resp_s *resp) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; FAR struct ieee802154_txdesc_s *txdesc; FAR struct iob_s *iob; int ret; /* Allocate an IOB to put the frame in */ iob = iob_alloc(false); DEBUGASSERT(iob != NULL); iob->io_flink = NULL; iob->io_len = 0; iob->io_offset = 0; iob->io_pktlen = 0; /* The Destination Addressing Mode and Source Addressing Mode fields shall * each be set to indicate extended addressing. * * The Frame Pending field shall be set to zero and ignored upon reception, * and the AR field shall be set to one. * * The PAN ID Compression field shall be set to one. [1] pg. 69 */ iob->io_data[0] = 0; iob->io_data[1] = 0; IEEE802154_SETACKREQ(iob->io_data, 0); IEEE802154_SETPANIDCOMP(iob->io_data, 0); IEEE802154_SETFTYPE(iob->io_data, 0, IEEE802154_FRAME_COMMAND); IEEE802154_SETDADDRMODE(iob->io_data, 0, IEEE802154_ADDRMODE_EXTENDED); IEEE802154_SETSADDRMODE(iob->io_data, 0, IEEE802154_ADDRMODE_EXTENDED); iob->io_len = 2; /* Each time a data or a MAC command frame is generated, the MAC sublayer * shall copy the value of macDSN into the Sequence Number field of the MHR * of the outgoing frame and then increment it by one. [1] pg. 40. */ iob->io_data[iob->io_len++] = priv->dsn++; /* In accordance with this value of the PAN ID Compression field, the * Destination PAN Identifier field shall contain the value of macPANId, while * the Source PAN Identifier field shall be omitted. [1] pg. 69 */ mac802154_putpanid(iob, priv->addr.panid); /* The Destination Address field shall contain the extended address of the * device requesting association. [1] pg. 69 */ mac802154_puteaddr(iob, resp->devaddr); /* The Source Address field shall contain the value of macExtendedAddress. */ mac802154_puteaddr(iob, priv->addr.eaddr); /* Copy in the Command Frame Identifier */ iob->io_data[iob->io_len++] = IEEE802154_CMD_ASSOC_RESP; /* Copy in the assigned short address */ if (resp->status == IEEE802154_STATUS_SUCCESS) { mac802154_putsaddr(iob, resp->assocsaddr); } else { mac802154_putsaddr(iob, &IEEE802154_SADDR_UNSPEC); } /* Copy in the association status */ iob->io_data[iob->io_len++] = resp->status; /* Get exclusive access to the MAC */ ret = mac802154_takesem(&priv->exclsem, true); if (ret < 0) { iob_free(iob); return ret; } /* Allocate the txdesc, waiting if necessary */ ret = mac802154_txdesc_alloc(priv, &txdesc, true); if (ret < 0) { iob_free(iob); mac802154_givesem(&priv->exclsem); return ret; } txdesc->frame = iob; txdesc->frametype = IEEE802154_FRAME_COMMAND; txdesc->destaddr.mode = IEEE802154_ADDRMODE_EXTENDED; IEEE802154_PANIDCOPY(txdesc->destaddr.panid, priv->addr.panid); IEEE802154_EADDRCOPY(txdesc->destaddr.eaddr, resp->devaddr); mac802154_setupindirect(priv, txdesc); mac802154_givesem(&priv->exclsem); return OK; } /**************************************************************************** * Internal MAC Functions ****************************************************************************/ /**************************************************************************** * Name: mac802154_txdone_assocreq * * Description: * Handle the completion (success/failure) of transmitting an association * request command. * * Assumptions: * Called with the MAC locked. * ****************************************************************************/ void mac802154_txdone_assocreq(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s *txdesc) { enum ieee802154_status_e status; FAR struct mac802154_notif_s *privnotif = (FAR struct mac802154_notif_s *)txdesc->conf; FAR struct ieee802154_notif_s *notif = &privnotif->pub; FAR struct ieee802154_txdesc_s *respdesc; if(txdesc->conf->status != IEEE802154_STATUS_SUCCESS) { /* if the association request command cannot be sent due to a * channel access failure, the MAC sublayer shall notify the next * higher layer. [1] pg. 33 */ /* We can actually high-jack the data conf notification since it * is allocated as an ieee80215_notif_s anyway. Before we overwrite * any data though, we need to get the status from the data * confirmation as that is the method we use to get the reason * why the tx failed from the radio layer. */ status = txdesc->conf->status; notif->notiftype = IEEE802154_NOTIFY_CONF_ASSOC; notif->u.assocconf.status = status; /* The short device address allocated by the coordinator on * successful association. This parameter will be equal to 0xffff * if the association attempt was unsuccessful. [1] pg. 81 */ IEEE802154_SADDRCOPY(notif->u.assocconf.saddr, &IEEE802154_SADDR_UNSPEC); /* We are now done the operation, unlock the semaphore */ priv->curr_op = MAC802154_OP_NONE; priv->cmd_desc = NULL; mac802154_givesem(&priv->op_sem); /* Release the MAC, call the callback, get exclusive access again */ mac802154_givesem(&priv->exclsem); mac802154_notify(priv, notif); mac802154_takesem(&priv->exclsem, false); } else { /* On receipt of the acknowledgment to the association request * command, the device shall wait for at most macResponseWaitTime * for the coordinator to make its association decision; the PIB * attribute macResponseWaitTime is a network-topology-dependent * parameter and may be set to match the specific requirements of * the network that a device is trying to join. If the device is * tracking the beacon, it shall attempt to extract the association * response command from the coordinator whenever it is indicated in * the beacon frame. If the device is not tracking the beacon, it * shall attempt to extract the association response command from * the coordinator after macResponseWaitTime. [1] pg. 34 */ if (priv->trackingbeacon) { /* We are tracking the beacon, so we should see our address in the * beacon frame within macResponseWaitTime if the coordinator is going * to respond. Setup a timeout for macResponseWaitTime so that we * can inform the next highest layer if the association attempt fails * due to NO_DATA. */ mac802154_timerstart(priv, (priv->resp_waittime * IEEE802154_BASE_SUPERFRAME_DURATION), mac802154_timeout_assoc); } else { /* Make sure the coordinator address mode is not set to none. This shouldn't * happen since the association request should have set the mode to short or * extended */ DEBUGASSERT(priv->coordaddr.mode != IEEE802154_ADDRMODE_NONE); /* Send the Data Request MAC command after macResponseWaitTime to * extract the data from the coordinator. */ mac802154_txdesc_alloc(priv, &respdesc, false); mac802154_create_datareq(priv, &priv->coordaddr, IEEE802154_ADDRMODE_EXTENDED, respdesc); priv->curr_cmd = IEEE802154_CMD_DATA_REQ; priv->radio->txdelayed(priv->radio, respdesc, (priv->resp_waittime*IEEE802154_BASE_SUPERFRAME_DURATION)); } /* We can deallocate the data conf notification as it is no longer * needed. We can't use the public function here since we already * have the MAC locked. */ privnotif->flink = priv->notif_free; priv->notif_free = privnotif; } } /**************************************************************************** * Name: mac802154_txdone_datareq_assoc * * Description: * Handle the completion (success/failure) of transmitting a data request * command in an effort to extract the association response from the * coordinator. * * Assumptions: * Called with the MAC locked. * ****************************************************************************/ void mac802154_txdone_datareq_assoc(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s *txdesc) { enum ieee802154_status_e status; FAR struct mac802154_notif_s *privnotif = (FAR struct mac802154_notif_s *)txdesc->conf; FAR struct ieee802154_notif_s *notif = &privnotif->pub; /* If the data request failed to be sent, notify the next layer * that the association has failed. * OR * On receipt of the Ack frame with the Frame Pending field set * to zero, the device shall conclude that there are no data * pending at the coordinator. [1] pg. 43 */ if (notif->u.dataconf.status != IEEE802154_STATUS_SUCCESS || txdesc->framepending == 0) { if (notif->u.dataconf.status != IEEE802154_STATUS_SUCCESS) { status = notif->u.dataconf.status; } else { /* If the device does not extract an association response * command frame from the coordinator within macResponseWaitTime, * the MLME shall issue the MLME-ASSOCIATE.confirm primitive, * as described in 6.2.2.4, with a status of NO_DATA, and the * association attempt shall be deemed a failure. [1] pg. 34 */ status = IEEE802154_STATUS_NO_DATA; } notif->notiftype = IEEE802154_NOTIFY_CONF_ASSOC; notif->u.assocconf.status = status; /* The short device address allocated by the coordinator on * successful association. This parameter will be equal to 0xffff * if the association attempt was unsuccessful. [1] pg. 81 */ IEEE802154_SADDRCOPY(notif->u.assocconf.saddr, &IEEE802154_SADDR_UNSPEC); /* We are now done the operation, and can release the command */ priv->curr_op = MAC802154_OP_NONE; priv->cmd_desc = NULL; mac802154_givesem(&priv->op_sem); /* Release the MAC, call the callback, get exclusive access again */ mac802154_givesem(&priv->exclsem); mac802154_notify(priv, notif); mac802154_takesem(&priv->exclsem, false); } else { /* On receipt of the acknowledgment frame with the Frame * Pending field set to one, a device shall enable its * receiver for at most macMaxFrameTotalWaitTime to receive * the corresponding data frame from the coordinator. [1] pg.43 */ priv->radio->rxenable(priv->radio, true); /* Start a timer, if we receive the data frame, we will cancel * the timer, otherwise it will expire and we will notify the * next highest layer of the failure. */ mac802154_timerstart(priv, priv->max_frame_waittime, mac802154_timeout_assoc); /* We can deallocate the data conf notification as it is no longer * needed. We can't use the public function here since we already * have the MAC locked. */ privnotif->flink = priv->notif_free; priv->notif_free = privnotif; mac802154_givesem(&priv->notif_sem); } } /**************************************************************************** * Name: mac802154_rx_assocreq * * Description: * Function called from the generic RX Frame worker to parse and handle the * reception of an Association Request MAC command frame. * ****************************************************************************/ void mac802154_rx_assocreq(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_data_ind_s *ind) { FAR struct iob_s *frame = ind->frame; FAR struct ieee802154_notif_s *notif; uint8_t cap; /* Get exclusive access to the MAC */ mac802154_takesem(&priv->exclsem, false); /* Allocate a notification to pass to the next highest layer */ mac802154_notif_alloc(priv, ¬if, false); notif->notiftype = IEEE802154_NOTIFY_IND_ASSOC; /* Association Requests should always be sent from a device with source * addressing mode set to extended mode. Throw out any request received * without addressing set to extended */ if (ind->src.mode != IEEE802154_ADDRMODE_EXTENDED) { goto errout_with_sem; } /* Copy the extended address of the requesting device */ IEEE802154_EADDRCOPY(notif->u.assocind.devaddr, ind->src.eaddr); /* Copy in the capability information from the frame to the notification */ cap = frame->io_data[frame->io_offset++]; notif->u.assocind.capabilities.devtype = (cap >> IEEE802154_CAPABILITY_SHIFT_DEVTYPE) & 0x01; notif->u.assocind.capabilities.powersource = (cap >> IEEE802154_CAPABILITY_SHIFT_PWRSRC) & 0x01; notif->u.assocind.capabilities.rxonidle = (cap >> IEEE802154_CAPABILITY_SHIFT_RXONIDLE) & 0x01; notif->u.assocind.capabilities.security = (cap >> IEEE802154_CAPABILITY_SHIFT_SECURITY) & 0x01; notif->u.assocind.capabilities.allocaddr = (cap >> IEEE802154_CAPABILITY_SHIFT_ALLOCADDR) & 0x01; #ifdef CONFIG_IEEE802154_SECURITY #error Missing security logic #endif /* Unlock the MAC */ mac802154_givesem(&priv->exclsem); /* Notify the next highest layer of the association status */ mac802154_notify(priv, notif); return; errout_with_sem: mac802154_givesem(&priv->exclsem); return; } /**************************************************************************** * Name: mac802154_rx_assocresp * * Description: * Function called from the generic RX Frame worker to parse and handle the * reception of an Association Response MAC command frame. * ****************************************************************************/ void mac802154_rx_assocresp(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_data_ind_s *ind) { FAR struct iob_s *iob = ind->frame; FAR struct ieee802154_notif_s *notif; /* Check if we are performing an Association operation, if not, we will just * ignore the frame. */ if (priv->curr_op != MAC802154_OP_ASSOC) { return; } /* Cancel the timeout used if we didn't get a response */ mac802154_timercancel(priv); /* Get exclusive access to the MAC */ mac802154_takesem(&priv->exclsem, false); /* Allocate a notification to pass to the next highest layer */ mac802154_notif_alloc(priv, ¬if, false); notif->notiftype = IEEE802154_NOTIFY_CONF_ASSOC; /* Parse the short address from the response */ mac802154_takesaddr(iob, priv->addr.saddr); /* Inform the radio of the address change */ priv->radio->set_attr(priv->radio, IEEE802154_ATTR_MAC_SHORT_ADDRESS, (FAR union ieee802154_attr_u *)priv->addr.saddr); /* A Short Address field value equal to 0xfffe shall indicate that the device * has been successfully associated with a PAN but has not been allocated a * short address. In this case, the device shall communicate on the PAN using * only its extended address. [1] pg. 70 */ if (IEEE802154_SADDRCMP(priv->addr.saddr, &IEEE802154_SADDR_BCAST)) { /* TODO: Figure out if this is sufficient */ priv->addr.mode = IEEE802154_ADDRMODE_SHORT; } /* Parse the status from the response */ notif->u.assocconf.status = iob->io_data[iob->io_offset++]; if (notif->u.assocconf.status == IEEE802154_STATUS_SUCCESS) { priv->isassoc = true; } else { priv->isassoc = false; } IEEE802154_SADDRCOPY(notif->u.assocconf.saddr, priv->addr.saddr); /* Unlock the MAC */ mac802154_givesem(&priv->exclsem); /* We are no longer performing the association operation */ priv->curr_op = MAC802154_OP_NONE; priv->cmd_desc = NULL; mac802154_givesem(&priv->op_sem); /* Notify the next highest layer of the association status */ mac802154_notify(priv, notif); } /**************************************************************************** * Private Function ****************************************************************************/ /**************************************************************************** * Name: mac802154_timeout_assoc * * Description: * Function registered with MAC timer that gets called via the work queue to * handle a timeout for extracting the Association Response from the Coordinator. * ****************************************************************************/ static void mac802154_timeout_assoc(FAR struct ieee802154_privmac_s *priv) { FAR struct ieee802154_notif_s *notif; DEBUGASSERT(priv->curr_op == MAC802154_OP_ASSOC); /* If the device does not extract an association response command * frame from the coordinator within macResponseWaitTime, the MLME * shall issue the MLME-ASSOCIATE.confirm primitive, as described * in 6.2.2.4, with a status of NO_DATA, and the association attempt * shall be deemed a failure. [1] pg. 33 */ /* Allocate a notification struct to pass to the next highest layer. * Don't allow EINTR to interrupt. */ mac802154_takesem(&priv->exclsem, false); mac802154_notif_alloc(priv, ¬if, false); /* We are no longer performing the association operation */ priv->curr_op = MAC802154_OP_NONE; priv->cmd_desc = NULL; mac802154_givesem(&priv->op_sem); /* Release the MAC */ mac802154_givesem(&priv->exclsem); notif->notiftype = IEEE802154_NOTIFY_CONF_ASSOC; notif->u.assocconf.status = IEEE802154_STATUS_NO_DATA; IEEE802154_SADDRCOPY(notif->u.assocconf.saddr, &IEEE802154_SADDR_UNSPEC); mac802154_notify(priv, notif); }