/**************************************************************************** * wireless/ieee802154/mac802154.c * * Copyright (C) 2016 Sebastien Lorquet. All rights reserved. * Copyright (C) 2017 Verge Inc. All rights reserved. * Author: Sebastien Lorquet * 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 #include "mac802154.h" #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* If processing is not done at the interrupt level, then work queue support * is required. */ #if !defined(CONFIG_SCHED_WORKQUEUE) # error Work queue support is required in this configuration (CONFIG_SCHED_WORKQUEUE) #else /* Use the low priority work queue if possible */ # if defined(CONFIG_MAC802154_HPWORK) # define MAC802154_WORK HPWORK # elif defined(CONFIG_MAC802154_LPWORK) # define MAC802154_WORK LPWORK # else # error Neither CONFIG_MAC802154_HPWORK nor CONFIG_MAC802154_LPWORK defined # endif #endif #if !defined(CONFIG_MAC802154_NNOTIF) || CONFIG_MAC802154_NNOTIF <= 0 # undef CONFIG_MAC802154_NNOTIF # define CONFIG_MAC802154_NNOTIF 6 #endif #if !defined(CONFIG_MAC802154_NTXDESC) || CONFIG_MAC802154_NTXDESC <= 0 # undef CONFIG_MAC802154_NTXDESC # define CONFIG_MAC802154_NTXDESC 3 #endif #if CONFIG_MAC802154_NTXDESC > CONFIG_MAC802154_NNOTIF #error CONFIG_MAC802154_NNOTIF must be greater than CONFIG_MAC802154_NTXDESC #endif /**************************************************************************** * Private Types ****************************************************************************/ struct mac802154_txtrans_s { /* Supports a singly linked list */ FAR struct mac802154_txtrans_s *flink; FAR struct iob_s *frame; uint8_t handle; enum ieee802154_frametype_e frametype; sem_t sem; }; struct mac802154_unsec_mhr_s { uint8_t length; union { uint16_t frame_control; uint8_t data[IEEE802154_MAX_UNSEC_MHR_OVERHEAD]; } u; }; struct mac802154_radiocb_s { struct ieee802154_radiocb_s cb; FAR struct ieee802154_privmac_s *priv; }; /* The privmac structure holds the internal state of the MAC and is the * underlying represention of the opaque MACHANDLE. It contains storage for * the IEEE802.15.4 MIB attributes. */ struct ieee802154_privmac_s { FAR struct ieee802154_radio_s *radio; /* Contained IEEE802.15.4 radio dev */ FAR const struct mac802154_maccb_s *cb; /* Contained MAC callbacks */ FAR struct mac802154_radiocb_s radiocb; /* Interface to bind to radio */ sem_t exclsem; /* Support exclusive access */ /* Support a single transaction dedicated to commands. As of now I see no * condition where you need to have more than one command frame simultaneously */ struct { sem_t sem; /* Exclusive use of the cmdtrans */ enum ieee802154_cmdid_e type; /* Type of cmd in the cmdtrans */ struct mac802154_txtrans_s trans; /* Dedicated txframe for cmds */ /* Has the command been successfully sent. This is to help protect * against an odd edge case that may or may not ever happen. The condition * occurs when you receive a seemingly appropriate response to the command * yet the command was never actually sent. */ bool txdone; } cmd; /* Pre-allocated notifications to be passed to the registered callback. These * need to be freed by the application using mac802154_xxxxnotif_free when * the callee layer is finished with it's use. */ FAR struct ieee802154_notif_s *notif_free; struct ieee802154_notif_s notif_alloc[CONFIG_MAC802154_NNOTIF]; sq_queue_t notif_queue; FAR struct ieee802154_txdesc_s *txdesc_free; struct ieee802154_txdesc_s txdesc_alloc[CONFIG_IEEE802154_NTXDESC]; sq_queue_t txdesc_queue; sq_queue_t txdone_queue; /* Work structures for offloading aynchronous work */ struct work_s tx_work; struct work_s rx_work; /* Support a singly linked list of transactions that will be sent using the * CSMA algorithm. On a non-beacon enabled PAN, these transactions will be * sent whenever. On a beacon-enabled PAN, these transactions will be sent * during the CAP of the Coordinator's superframe. */ sq_queue_t csma_queue; /* Support a singly linked list of transactions that will be sent indirectly. * This list should only be used by a MAC acting as a coordinator. These * transactions will stay here until the data is extracted by the destination * device sending a Data Request MAC command or if too much time passes. This * list should also be used to populate the address list of the outgoing * beacon frame. */ sq_queue_t indirect_queue; /* Support a singly linked list of frames received */ sq_queue_t dataind_queue; /* MAC PIB attributes, grouped to save memory */ /* Holds all address information (Extended, Short, and PAN ID) for the MAC. */ struct ieee802154_addr_s addr; /* Holds all address information (Extended, Short) for Coordinator */ struct ieee802154_addr_s coordaddr; /* The maximum number of symbols to wait for an acknowledgement frame to * arrive following a transmitted data frame. [1] pg. 126 * * NOTE: This may be able to be a 16-bit or even an 8-bit number. I wasn't * sure at the time what the range of reasonable values was. */ uint32_t ack_waitdur; /* The maximum time to wait either for a frame intended as a response to a * data request frame or for a broadcast frame following a beacon with the * Frame Pending field set to one. [1] pg. 127 * * NOTE: This may be able to be a 16-bit or even an 8-bit number. I wasn't * sure at the time what the range of reasonable values was. */ uint32_t max_frame_waittime; /* The maximum time (in unit periods) that a transaction is stored by a * coordinator and indicated in its beacon. */ uint16_t trans_persisttime; /* Contents of beacon payload */ uint8_t beacon_payload[IEEE802154_MAX_BEACON_PAYLOAD_LEN]; uint8_t beacon_payload_len; /* Length of beacon payload */ uint8_t battlifeext_periods; /* # of backoff periods during which rx is * enabled after the IFS following beacon */ uint8_t bsn; /* Seq. num added to tx beacon frame */ uint8_t dsn; /* Seq. num added to tx data or MAC frame */ uint8_t maxretries; /* Max # of retries alloed after tx failure */ /* The maximum time, in multiples of aBaseSuperframeDuration, a device shall * wait for a response command frame to be available following a request * command frame. [1] 128. */ uint8_t resp_waittime; /* The total transmit duration (including PHY header and FCS) specified in * symbols. [1] pg. 129. */ uint32_t tx_totaldur; /* Start of 32-bit bitfield */ uint32_t isassoc : 1; /* Are we associated to the PAN */ uint32_t assocpermit : 1; /* Are we allowing assoc. as a coord. */ uint32_t autoreq : 1; /* Automatically send data req. if addr * addr is in the beacon frame */ uint32_t battlifeext : 1; /* Is BLE enabled */ uint32_t gtspermit : 1; /* Is PAN Coord. accepting GTS reqs. */ uint32_t promisc : 1; /* Is promiscuous mode on? */ uint32_t rngsupport : 1; /* Does MAC sublayer support ranging */ uint32_t sec_enabled : 1; /* Does MAC sublayer have security en. */ uint32_t timestamp_support : 1; /* Does MAC layer supports timestamping */ uint32_t max_csmabackoffs : 3; /* Max num backoffs for CSMA algorithm * before declaring ch access failure */ uint32_t beaconorder : 4; /* Freq. that beacon is transmitted */ uint32_t superframeorder : 4; /* Length of active portion of outgoing * superframe, including the beacon */ /* The offset, measured is symbols, between the symbol boundary at which the * MLME captures the timestamp of each transmitted and received frame, and * the onset of the first symbol past the SFD, namely the first symbol of * the frames [1] pg. 129. */ uint32_t sync_symboffset : 12; /* End of 32-bit bitfield */ /* Start of 32-bit bitfield */ uint32_t beacon_txtime : 24; /* Time of last beacon transmit */ uint32_t minbe : 4; /* Min value of backoff exponent (BE) */ uint32_t maxbe : 4; /* Max value of backoff exponent (BE) */ /* End of 32-bit bitfield */ /* Start of 32-bit bitfield */ uint32_t txctrl_activedur : 17; /* Duration for which tx is permitted to * be active */ uint32_t txctrl_pausedur : 1; /* Duration after tx before another tx is * permitted. 0=2000, 1= 10000 */ /* What type of device is this node acting as */ enum ieee802154_devmode_e devmode : 2; bool csma_tryagain : 1; bool gts_tryagain : 1; /* 10-bits remaining */ /* End of 32-bit bitfield. */ /* TODO: Add Security-related MAC PIB attributes */ }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Internal Functions */ static inline int mac802154_takesem(sem_t *sem); #define mac802154_givesem(s) sem_post(s); static void mac802154_resetqueues(FAR struct ieee802154_privmac_s *priv); static void mac802154_notifpool_init(FAR struct ieee802154_privmac_s *priv); static FAR struct ieee802154_notif_s * mac802154_notif_alloc(FAR struct ieee802154_privmac_s *priv); static int mac802154_defaultmib(FAR struct ieee802154_privmac_s *priv); static int mac802154_applymib(FAR struct ieee802154_privmac_s *priv); static void mac802154_txdone_worker(FAR void *arg); static void mac802154_rxframe_worker(FAR void *arg); static void mac802154_cmd_txdone(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s *txdesc); /* IEEE 802.15.4 PHY Interface OPs */ static int mac802154_poll_csma(FAR const struct ieee802154_radiocb_s *radiocb, FAR struct ieee802154_txdesc_s **tx_desc, FAR struct iob_s **frame); static int mac802154_poll_gts(FAR const struct ieee802154_radiocb_s *radiocb, FAR struct ieee802154_txdesc_s **tx_desc, FAR struct iob_s **frame); static void mac802154_txdone(FAR const struct ieee802154_radiocb_s *radiocb, FAR const struct ieee802154_txdesc_s *tx_desc); static void mac802154_rxframe(FAR const struct ieee802154_radiocb_s *radiocb, FAR struct ieee802154_data_ind_s *ind); /**************************************************************************** * Private Data ****************************************************************************/ /* Map between ieee802154_addrmode_e enum and actual address length */ static const uint8_t mac802154_addr_length[4] = {0, 0, 2, 8}; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: mac802154_semtake * * Description: * Acquire the semaphore used for access serialization. * ****************************************************************************/ static inline int mac802154_takesem(sem_t *sem) { /* Take a count from the semaphore, possibly waiting */ if (sem_wait(sem) < 0) { /* EINTR is the only error that we expect */ int errcode = get_errno(); DEBUGASSERT(errcode == EINTR); return -errcode; } return OK; } /**************************************************************************** * Name: mac802154_resetqueues * * Description: * Initializes the various queues used in the MAC layer. Called on creation * of MAC. * ****************************************************************************/ static void mac802154_resetqueues(FAR struct ieee802154_privmac_s *priv) { int i; sq_init(&priv->txdone_queue); sq_init(&priv->csma_queue); sq_init(&priv->indirect_queue); sq_init(&priv->dataind_queue); sq_init(&priv->notif_queue); sq_init(&priv->txdesc_queue); for (i = 0; i < CONFIG_MAC802154_NNOTIF; i++) { sq_addlast((FAR sq_entry_t *)&priv->notif_alloc[i], &priv->notif_queue); } for (i = 0; i < CONFIG_MAC802154_NTXDESC; i++) { sq_addlast((FAR sq_entry_t *)&priv->txdesc_alloc[i], &priv->txdesc_queue); } mac802154_notifpool_init(priv); } /**************************************************************************** * Name: mac802154_notifpool_init * * Description: * This function initializes the notification structure pool. It allows the * MAC to pass notifications and for the callee to free them when they are * done using them, saving copying the data when passing. * ****************************************************************************/ static void mac802154_notifpool_init(FAR struct ieee802154_privmac_s *priv) { FAR struct ieee802154_notif_s *pool = priv->notif_alloc; int remaining = CONFIG_MAC802154_NNOTIF; priv->notif_free = NULL; while (remaining > 0) { FAR struct ieee802154_notif_s *notif = pool; /* Add the next meta data structure from the pool to the list of * general structures. */ notif->flink = priv->notif_free; priv->notif_free = notif; /* Set up for the next structure from the pool */ pool++; remaining--; } } /**************************************************************************** * Name: mac802154_notif_alloc * * Description: * This function allocates a free notification structure from the free list * to be used for passing to the registered notify callback. The callee software * is responsible for freeing the notification structure after it is done using * it via mac802154_notif_free. * * Assumptions: * priv MAC struct is locked when calling. * ****************************************************************************/ static FAR struct ieee802154_notif_s * mac802154_notif_alloc(FAR struct ieee802154_privmac_s *priv) { FAR struct ieee802154_notif_s *notif; if (priv->notif_free == NULL) { return NULL; } notif = priv->notif_free; priv->notif_free = notif->flink; return notif; } /**************************************************************************** * Name: mac802154_defaultmib * * Description: * Set the MIB to its default values. * ****************************************************************************/ static int mac802154_defaultmib(FAR struct ieee802154_privmac_s *priv) { priv->isassoc = false; /* Not associated with a PAN */ priv->assocpermit = false; /* Device (if coord) not accepting association */ priv->autoreq = true; /* Auto send data req if addr. in beacon */ priv->battlifeext = false; /* BLE disabled */ priv->beacon_payload_len = 0; /* Beacon payload NULL */ priv->beaconorder = 15; /* Non-beacon enabled network */ priv->superframeorder = 15; /* Length of active portion of outgoing SF */ priv->beacon_txtime = 0; /* Device never sent a beacon */ #warning Set BSN and DSN to random values! priv->bsn = 0; priv->dsn = 0; priv->gtspermit = true; /* PAN Coord accepting GTS requests */ priv->minbe = 3; /* Min value of backoff exponent (BE) */ priv->maxbe = 5; /* Max value of backoff exponent (BE) */ priv->max_csmabackoffs = 4; /* Max # of backoffs before failure */ priv->maxretries = 3; /* Max # of retries allowed after failure */ priv->promisc = false; /* Device not in promiscuous mode */ priv->rngsupport = false; /* Ranging not yet supported */ priv->resp_waittime = 32; /* 32 SF durations */ priv->sec_enabled = false; /* Security disabled by default */ priv->tx_totaldur = 0; /* 0 transmit duration */ priv->trans_persisttime = 0x01F4; /* Reset the Coordinator address */ priv->coordaddr.mode = IEEE802154_ADDRMODE_NONE; priv->coordaddr.saddr = IEEE802154_SADDR_UNSPEC; memcpy(&priv->coordaddr.eaddr[0], IEEE802154_EADDR_UNSPEC, IEEE802154_EADDR_LEN); /* Reset the device's address */ priv->addr.mode = IEEE802154_ADDRMODE_NONE; priv->addr.panid = IEEE802154_PAN_UNSPEC; priv->addr.saddr = IEEE802154_SADDR_UNSPEC; memcpy(&priv->addr.eaddr[0], IEEE802154_EADDR_UNSPEC, IEEE802154_EADDR_LEN); /* These attributes are effected and determined based on the PHY. Need to * figure out how to "share" attributes between the radio driver and this * MAC layer * * macAckWaitDuration * macBattLifeExtPeriods * macMaxFrameTotalWaitTime * macLIFSPeriod * macSIFSPeriod * macSyncSymbolOffset * macTimestampSupported * macTxControlActiveDuration * macTxControlPauseDuration * macRxOnWhenIdle */ return OK; } /**************************************************************************** * Name: mac802154_applymib * * Description: * Some parts of the MIB must be sent to the radio device. This routine * calls the radio device routines to store the related parameters in the * radio driver. It must be called each time a MIB parameter is changed. * ****************************************************************************/ static int mac802154_applymib(FAR struct ieee802154_privmac_s *priv) { return OK; } /**************************************************************************** * Name: mac802154_poll_csma * * Description: * Called from the radio driver through the callback struct. This function is * called when the radio has room for another CSMA transaction. If the MAC * layer has a CSMA transaction, it copies it into the supplied buffer and * returns the length. A descriptor is also populated with the transaction. * ****************************************************************************/ static int mac802154_poll_csma(FAR const struct ieee802154_radiocb_s *radiocb, FAR struct ieee802154_txdesc_s **txdesc, FAR struct iob_s **frame) { FAR struct mac802154_radiocb_s *cb = (FAR struct mac802154_radiocb_s *)radiocb; FAR struct ieee802154_privmac_s *priv; FAR struct mac802154_txtrans_s *trans; FAR struct ieee802154_txdesc_s *desc; FAR struct ieee802154_notif_s *notif; DEBUGASSERT(cb != NULL && cb->priv != NULL); priv = cb->priv; /* Get exclusive access to the driver structure. We don't care about any * signals so if we see one, just go back to trying to get access again. */ while (mac802154_takesem(&priv->exclsem) != 0); /* Check to see if there are any CSMA transactions waiting */ trans = (FAR struct mac802154_txtrans_s *)sq_remfirst(&priv->csma_queue); mac802154_givesem(&priv->exclsem); if (trans != NULL) { /* Allocate a Tx descriptor to pass */ desc = (FAR struct ieee802154_txdesc_s *)sq_remfirst(&priv->txdesc_queue); if (desc == NULL) { wlerr("ERROR: Failed to allocate ieee802154_txdesc_s"); goto errout; } /* Allocate a notif struct (ie data confirmation struct) to pass with * the tx descriptor. */ notif = mac802154_notif_alloc(priv); if (notif == NULL) { wlerr("ERROR: Failed to allocate ieee802154_notif_s"); /* Free the tx descriptor */ sq_addlast((FAR sq_entry_t *)desc, &priv->txdesc_queue); goto errout; } desc->conf = (FAR struct ieee802154_data_conf_s *)notif; desc->conf->handle = trans->handle; desc->frametype = trans->frametype; *frame = trans->frame; *txdesc = desc; /* Now that we've passed off the data, notify the waiting thread. * NOTE: The transaction was allocated on the waiting thread's stack so * it will be automatically deallocated when that thread awakens and * returns. */ sem_post(&trans->sem); return (trans->frame->io_len); } errout: /* Need to set flag to tell MAC to retry notifying radio layer about transmit * since we couldn't allocate the required data structures at this time. */ priv->csma_tryagain = true; mac802154_givesem(&priv->exclsem); return 0; } /**************************************************************************** * Name: mac802154_poll_gts * * Description: * Called from the radio driver through the callback struct. This function is * called when the radio has room for another GTS transaction. If the MAC * layer has a GTS transaction, it copies it into the supplied buffer and * returns the length. A descriptor is also populated with the transaction. * ****************************************************************************/ static int mac802154_poll_gts(FAR const struct ieee802154_radiocb_s *radiocb, FAR struct ieee802154_txdesc_s **tx_desc, FAR struct iob_s **frame) { FAR struct mac802154_radiocb_s *cb = (FAR struct mac802154_radiocb_s *)radiocb; FAR struct ieee802154_privmac_s *priv; FAR struct mac802154_txtrans_s *trans; FAR struct ieee802154_txdesc_s *desc; int ret = 0; DEBUGASSERT(cb != NULL && cb->priv != NULL); priv = cb->priv; /* Get exclusive access to the driver structure. We don't care about any * signals so if we see one, just go back to trying to get access again. */ while (mac802154_takesem(&priv->exclsem) != 0); #warning Missing logic. mac802154_givesem(&priv->exclsem); return 0; errout: /* Need to set flag to tell MAC to retry notifying radio layer about transmit * since we couldn't allocate the required data structures at this time. */ priv->gts_tryagain = true; mac802154_givesem(&priv->exclsem); return 0; } /**************************************************************************** * Name: mac802154_txdone * * Description: * Called from the radio driver through the callback struct. This function is * called when the radio has completed a transaction. The txdesc passed gives * provides information about the completed transaction including the original * handle provided when the transaction was created and the status of the * transaction. This function copies the descriptor and schedules work to * handle the transaction without blocking the radio. * ****************************************************************************/ static void mac802154_txdone(FAR const struct ieee802154_radiocb_s *radiocb, FAR const struct ieee802154_txdesc_s *txdesc) { FAR struct mac802154_radiocb_s *cb = (FAR struct mac802154_radiocb_s *)radiocb; FAR struct ieee802154_privmac_s *priv; DEBUGASSERT(cb != NULL && cb->priv != NULL); priv = cb->priv; /* Get exclusive access to the driver structure. We don't care about any * signals so if we see one, just go back to trying to get access again. */ while (mac802154_takesem(&priv->exclsem) != 0); sq_addlast((FAR sq_entry_t *)txdesc, &priv->txdone_queue); mac802154_givesem(&priv->exclsem); /* Schedule work with the work queue to process the completion further */ if (work_available(&priv->tx_work)) { work_queue(MAC802154_WORK, &priv->tx_work, mac802154_txdone_worker, (FAR void *)priv, 0); } } /**************************************************************************** * Name: mac802154_txdone_worker * * Description: * Worker function scheduled from mac802154_txdone. This function pops any * TX descriptors off of the list and calls the next highest layers callback * to inform the layer of the completed transaction and the status of it. * ****************************************************************************/ static void mac802154_txdone_worker(FAR void *arg) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)arg; FAR struct ieee802154_txdesc_s *txdesc; FAR struct ieee802154_data_conf_s *conf; FAR struct ieee802154_notif_s *notif; enum ieee802154_frametype_e frametype; int count; /* Get exclusive access to the driver structure. We don't care about any * signals so if we see one, just go back to trying to get access again. */ while (mac802154_takesem(&priv->exclsem) != 0); while (1) { txdesc = (FAR struct ieee802154_txdesc_s *)sq_remfirst(&priv->txdone_queue); if (txdesc == NULL) { break; } count++; /* Once we get the frametype and data confirmation struct, we can free * the tx descriptor. */ conf = txdesc->conf; frametype = txdesc->frametype; sq_addlast((FAR sq_entry_t *)txdesc, &priv->txdesc_queue); /* Cast the data_conf to a notification */ notif = (FAR struct ieee802154_notif_s *)conf; switch(frametype) { case IEEE802154_FRAME_DATA: { notif->notiftype = IEEE802154_NOTIFY_CONF_DATA; /* Release the MAC then call the callback */ mac802154_givesem(&priv->exclsem); priv->cb->notify(priv->cb, notif); } break; case IEEE802154_FRAME_COMMAND: { mac802154_cmd_txdone(priv, txdesc); /* We can deallocate the data conf notification as it is no longer * needed. We don't use the public function here since we already * have the MAC locked. Additionally, we are already handling the * tx_tryagain here, so we wouldn't want to handle it twice. */ notif->flink = priv->notif_free; priv->notif_free = notif; mac802154_givesem(&priv->exclsem); } break; default: { mac802154_givesem(&priv->exclsem); } break; } } /* If we've freed a tx descriptor or notification structure and a previous * attempt at passing data to the radio layer failed due to insufficient * available structures, try again now that we've freed some resources */ if (count > 0 && priv->csma_tryagain) { priv->csma_tryagain = false; priv->radio->ops->txnotify_csma(priv->radio); } if (count > 0 && priv->gts_tryagain) { priv->gts_tryagain = false; priv->radio->ops->txnotify_gts(priv->radio); } } /**************************************************************************** * Name: mac802154_cmd_txdone * * Description: * Called from mac802154_txdone_worker, this is a helper function for * handling command frames that have either successfully sent or failed. * ****************************************************************************/ static void mac802154_cmd_txdone(FAR struct ieee802154_privmac_s *priv, FAR struct ieee802154_txdesc_s *txdesc) { /* Check to see what type of command it was. All information about the command * will still be valid because it is protected by a semaphore. */ switch (priv->cmd.type) { case IEEE802154_CMD_ASSOC_REQ: 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 */ } else { priv->cmd.txdone = true; } break; default: break; } } /**************************************************************************** * Name: mac802154_rxframe * * Description: * Called from the radio driver through the callback struct. This function is * called when the radio has received a frame. The frame is passed in an iob, * so that we can free it when we are done processing. A pointer to the RX * descriptor is passed along with the iob, but it must be copied here as it * is allocated directly on the caller's stack. We simply link the frame, * copy the RX descriptor, and schedule a worker to process the frame later so * that we do not hold up the radio. * ****************************************************************************/ static void mac802154_rxframe(FAR const struct ieee802154_radiocb_s *radiocb, FAR struct ieee802154_data_ind_s *ind) { FAR struct mac802154_radiocb_s *cb = (FAR struct mac802154_radiocb_s *)radiocb; FAR struct ieee802154_privmac_s *priv; DEBUGASSERT(cb != NULL && cb->priv != NULL); priv = cb->priv; /* Get exclusive access to the driver structure. We don't care about any * signals so if we see one, just go back to trying to get access again. */ while (mac802154_takesem(&priv->exclsem) != 0); /* Push the iob onto the tail of the frame list for processing */ sq_addlast((FAR sq_entry_t *)ind, &priv->dataind_queue); mac802154_givesem(&priv->exclsem); /* Schedule work with the work queue to process the completion further */ if (work_available(&priv->rx_work)) { work_queue(MAC802154_WORK, &priv->rx_work, mac802154_rxframe_worker, (FAR void *)priv, 0); } } /**************************************************************************** * Name: mac802154_rxframe_worker * * Description: * Worker function scheduled from mac802154_rxframe. This function processes * any frames in the list. Frames intended to be consumed by the MAC layer * will not produce any callbacks to the next highest layer. Frames intended * for the application layer will be forwarded to them. * ****************************************************************************/ static void mac802154_rxframe_worker(FAR void *arg) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)arg; FAR struct ieee802154_data_ind_s *ind; FAR struct iob_s *frame; uint16_t *frame_ctrl; bool panid_comp; uint8_t ftype; while(1) { /* Get exclusive access to the driver structure. We don't care about any * signals so if we see one, just go back to trying to get access again. */ while (mac802154_takesem(&priv->exclsem) != 0); /* Push the iob onto the tail of the frame list for processing */ ind = (FAR struct ieee802154_data_ind_s *)sq_remfirst(&priv->dataind_queue); if (ind == NULL) { mac802154_givesem(&priv->exclsem); break; } /* Once we pop off the indication, we don't need to keep the mac locked */ mac802154_givesem(&priv->exclsem); /* Get a local copy of the frame to make it easier to access */ frame = ind->frame; /* Set a local pointer to the frame control then move the offset past * the frame control field */ frame_ctrl = (uint16_t *)&frame->io_data[frame->io_offset]; frame->io_offset += 2; /* We use the data_ind_s as a container for the frame information even if * this isn't a data frame */ ind->src.mode = (*frame_ctrl & IEEE802154_FRAMECTRL_SADDR) >> IEEE802154_FRAMECTRL_SHIFT_SADDR; ind->dest.mode = (*frame_ctrl & IEEE802154_FRAMECTRL_DADDR) >> IEEE802154_FRAMECTRL_SHIFT_DADDR; panid_comp = (*frame_ctrl & IEEE802154_FRAMECTRL_PANIDCOMP) >> IEEE802154_FRAMECTRL_SHIFT_PANIDCOMP; ind->dsn = frame->io_data[frame->io_offset++]; /* If the destination address is included */ if (ind->dest.mode != IEEE802154_ADDRMODE_NONE) { /* Get the destination PAN ID */ ind->dest.panid = frame->io_data[frame->io_offset]; frame->io_offset += 2; if (ind->dest.mode == IEEE802154_ADDRMODE_SHORT) { ind->dest.saddr = frame->io_data[frame->io_offset]; frame->io_offset += 2; } else if (ind->dest.mode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&ind->dest.eaddr[0], &frame->io_data[frame->io_offset], IEEE802154_EADDR_LEN); frame->io_offset += 8; } } if (ind->src.mode != IEEE802154_ADDRMODE_NONE) { /* If the source address is included, and the PAN ID compression field * is set, get the PAN ID from the header. */ if (!panid_comp) { ind->src.panid = frame->io_data[frame->io_offset]; frame->io_offset += 2; } /* If the source address is included, and the PAN ID compression field * is set, the source PAN ID is the same as the destination PAN ID */ else { ind->src.panid = ind->dest.panid; } if (ind->src.mode == IEEE802154_ADDRMODE_SHORT) { ind->src.saddr = frame->io_data[frame->io_offset]; frame->io_offset += 2; } else if (ind->src.mode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&ind->src.eaddr[0], &frame->io_data[frame->io_offset], IEEE802154_EADDR_LEN); frame->io_offset += 8; } } ftype = (*frame_ctrl & IEEE802154_FRAMECTRL_FTYPE) >> IEEE802154_FRAMECTRL_SHIFT_FTYPE; if (ftype == IEEE802154_FRAME_DATA) { /* If there is a registered MCPS callback receiver registered, send * the frame, otherwise, throw it out. */ if (priv->cb->rxframe != NULL) { priv->cb->rxframe(priv->cb, ind); } else { /* Free the data indication struct from the pool */ ieee802154_ind_free(ind); } } else if (ftype == IEEE802154_FRAME_COMMAND) { } else if (ftype == IEEE802154_FRAME_BEACON) { } else { /* The radio layer is responsible for handling all ACKs and retries. If for * some reason an ACK gets here, just throw it out. */ } } } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: mac802154_create * * Description: * Create a 802.15.4 MAC device from a 802.15.4 compatible radio device. * * The returned MAC structure should be passed to either the next highest * layer in the network stack, or registered with a mac802154dev character * or network drivers. In any of these scenarios, the next highest layer * should register a set of callbacks with the MAC layer by setting the * mac->cbs member. * * NOTE: This API does not create any device accessible to userspace. If * you want to call these APIs from userspace, you have to wrap your mac * in a character device via mac802154_device.c. * * Input Parameters: * radiodev - an instance of an IEEE 802.15.4 radio * * Returned Value: * An opaque reference to the MAC state data. * ****************************************************************************/ MACHANDLE mac802154_create(FAR struct ieee802154_radio_s *radiodev) { FAR struct ieee802154_privmac_s *mac; FAR struct ieee802154_radiocb_s *radiocb; /* Allocate object */ mac = (FAR struct ieee802154_privmac_s *) kmm_zalloc(sizeof(struct ieee802154_privmac_s)); if (mac == NULL) { return NULL; } /* Allow exclusive access to the privmac struct */ sem_init(&mac->exclsem, 0, 1); /* Allow exlusive access to the dedicated command transaction */ sem_init(&mac->cmd.sem, 0, 1); /* Setup the signaling semaphore for the dedicated command transaction */ sem_init(&mac->cmd.trans.sem, 0, 0); sem_setprotocol(&mac->cmd.trans.sem, SEM_PRIO_NONE); /* Initialize fields */ mac->radio = radiodev; mac802154_defaultmib(mac); mac802154_applymib(mac); /* Initialize the Radio callbacks */ mac->radiocb.priv = mac; radiocb = &mac->radiocb.cb; radiocb->poll_csma = mac802154_poll_csma; radiocb->poll_gts = mac802154_poll_gts; radiocb->txdone = mac802154_txdone; radiocb->rxframe = mac802154_rxframe; /* Bind our callback structure */ radiodev->ops->bind(radiodev, &mac->radiocb.cb); /* Initialize our various data pools */ ieee802154_indpool_initialize(); mac802154_resetqueues(mac); return (MACHANDLE)mac; } /**************************************************************************** * Name: mac802154_bind * * Description: * Bind the MAC callback table to the MAC state. * * Parameters: * mac - Reference to the MAC driver state structure * cb - MAC callback operations * * Returned Value: * OK on success; Negated errno on failure. * ****************************************************************************/ int mac802154_bind(MACHANDLE mac, FAR const struct mac802154_maccb_s *cb) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; priv->cb = cb; return OK; } /**************************************************************************** * Name: mac802154_ioctl * * Description: * Handle MAC and radio IOCTL commands directed to the MAC. * * Parameters: * mac - Reference to the MAC driver state structure * cmd - The IOCTL command * arg - The argument for the IOCTL command * * Returned Value: * OK on success; Negated errno on failure. * ****************************************************************************/ int mac802154_ioctl(MACHANDLE mac, int cmd, unsigned long arg) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; int ret = -EINVAL; FAR union ieee802154_macarg_u *macarg = (FAR union ieee802154_macarg_u *)((uintptr_t)arg); DEBUGASSERT(priv != NULL); /* Check for IOCTLs aimed at the IEEE802.15.4 MAC layer */ if (_MAC802154IOCVALID(cmd)) { /* Handle the MAC IOCTL command */ switch (cmd) { case MAC802154IOC_MLME_ASSOC_REQUEST: { ret = mac802154_req_associate(mac, &macarg->assocreq); } break; case MAC802154IOC_MLME_ASSOC_RESPONSE: { ret = mac802154_resp_associate(mac, &macarg->assocresp); } break; case MAC802154IOC_MLME_DISASSOC_REQUEST: { ret = mac802154_req_disassociate(mac, &macarg->disassocreq); } break; case MAC802154IOC_MLME_GET_REQUEST: { ret = mac802154_req_get(mac, macarg->getreq.pib_attr, &macarg->getreq.attrval); } break; case MAC802154IOC_MLME_GTS_REQUEST: { ret = mac802154_req_gts(mac, &macarg->gtsreq); } break; case MAC802154IOC_MLME_ORPHAN_RESPONSE: { ret = mac802154_resp_orphan(mac, &macarg->orphanresp); } break; case MAC802154IOC_MLME_RESET_REQUEST: { ret = mac802154_req_reset(mac, macarg->resetreq.rst_pibattr); } break; case MAC802154IOC_MLME_RXENABLE_REQUEST: { ret = mac802154_req_rxenable(mac, &macarg->rxenabreq); } break; case MAC802154IOC_MLME_SCAN_REQUEST: { ret = mac802154_req_scan(mac, &macarg->scanreq); } break; case MAC802154IOC_MLME_SET_REQUEST: { ret = mac802154_req_set(mac, macarg->setreq.pib_attr, &macarg->setreq.attrval); } break; case MAC802154IOC_MLME_START_REQUEST: { ret = mac802154_req_start(mac, &macarg->startreq); } break; case MAC802154IOC_MLME_SYNC_REQUEST: { ret = mac802154_req_sync(mac, &macarg->syncreq); } break; case MAC802154IOC_MLME_POLL_REQUEST: { ret = mac802154_req_poll(mac, &macarg->pollreq); } break; default: wlerr("ERROR: Unrecognized cmd: %d\n", cmd); ret = -ENOTTY; break; } } return ret; } /**************************************************************************** * MAC Interface Operations ****************************************************************************/ /**************************************************************************** * Name: mac802154_get_mhrlen * * Description: * Calculate the MAC header length given the frame meta-data. * ****************************************************************************/ int mac802154_get_mhrlen(MACHANDLE mac, FAR const struct ieee802154_frame_meta_s *meta) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; int ret = 3; /* Always frame control (2 bytes) and seq. num (1 byte) */ /* Check to make sure both the dest address and the source address are not set * to NONE */ if (meta->dest_addr.mode == IEEE802154_ADDRMODE_NONE && meta->src_addrmode == IEEE802154_ADDRMODE_NONE) { return -EINVAL; } /* The source address can only be set to NONE if the device is the PAN coord */ if (meta->src_addrmode == IEEE802154_ADDRMODE_NONE && priv->devmode != IEEE802154_DEVMODE_PANCOORD) { return -EINVAL; } /* Add the destination address length */ ret += mac802154_addr_length[meta->dest_addr.mode]; /* Add the source address length */ ret += mac802154_addr_length[ meta->src_addrmode]; /* If both destination and source addressing information is present, the MAC * sublayer shall compare the destination and source PAN identifiers. * [1] pg. 41. */ if (meta->src_addrmode != IEEE802154_ADDRMODE_NONE && meta->dest_addr.mode != IEEE802154_ADDRMODE_NONE) { /* If the PAN identifiers are identical, the PAN ID Compression field * shall be set to one, and the source PAN identifier shall be omitted * from the transmitted frame. [1] pg. 41. */ if (meta->dest_addr.panid == priv->addr.panid) { ret += 2; /* 2 bytes for destination PAN ID */ return ret; } } /* If we are here, PAN ID compression is off, so include the dest and source * PAN ID if the respective address is included */ if (meta->src_addrmode != IEEE802154_ADDRMODE_NONE) { ret += 2; /* 2 bytes for source PAN ID */ } if (meta->dest_addr.mode != IEEE802154_ADDRMODE_NONE) { ret += 2; /* 2 bytes for destination PAN ID */ } return ret; } /**************************************************************************** * Name: mac802154_req_data * * Description: * The MCPS-DATA.request primitive requests the transfer of a data SPDU * (i.e., MSDU) from a local SSCS entity to a single peer SSCS entity. * Confirmation is returned via the * struct mac802154_maccb_s->conf_data callback. * ****************************************************************************/ int mac802154_req_data(MACHANDLE mac, FAR const struct ieee802154_frame_meta_s *meta, FAR struct iob_s *frame) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; FAR struct mac802154_txtrans_s trans; uint16_t *frame_ctrl; uint8_t mhr_len = 3; /* Start assuming frame control and seq. num */ int ret; /* Check the required frame size */ if (frame->io_len > IEEE802154_MAX_PHY_PACKET_SIZE) { return -E2BIG; } /* Cast the first two bytes of the IOB to a uint16_t frame control field */ frame_ctrl = (FAR uint16_t *)&frame->io_data[0]; /* Ensure we start with a clear frame control field */ *frame_ctrl = 0; /* Set the frame type to Data */ *frame_ctrl |= IEEE802154_FRAME_DATA << IEEE802154_FRAMECTRL_SHIFT_FTYPE; /* If the msduLength is greater than aMaxMACSafePayloadSize, the MAC * sublayer will set the Frame Version to one. [1] pg. 118. */ if ((frame->io_len - frame->io_offset) > IEEE802154_MAX_SAFE_MAC_PAYLOAD_SIZE) { *frame_ctrl |= IEEE802154_FRAMECTRL_VERSION; } /* If the TXOptions parameter specifies that an acknowledged transmission * is required, the AR field will be set appropriately, as described in * 5.1.6.4 [1] pg. 118. */ *frame_ctrl |= (meta->msdu_flags.ack_tx << IEEE802154_FRAMECTRL_SHIFT_ACKREQ); /* If the destination address is present, copy the PAN ID and one of the * addresses, depending on mode, into the MHR. */ if (meta->dest_addr.mode != IEEE802154_ADDRMODE_NONE) { memcpy(&frame->io_data[mhr_len], &meta->dest_addr.panid, 2); mhr_len += 2; if (meta->dest_addr.mode == IEEE802154_ADDRMODE_SHORT) { memcpy(&frame->io_data[mhr_len], &meta->dest_addr.saddr, 2); mhr_len += 2; } else if (meta->dest_addr.mode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&frame->io_data[mhr_len], &meta->dest_addr.eaddr, IEEE802154_EADDR_LEN); mhr_len += IEEE802154_EADDR_LEN; } } /* Set the destination addr mode inside the frame control field */ *frame_ctrl |= (meta->dest_addr.mode << IEEE802154_FRAMECTRL_SHIFT_DADDR); /* From this point on, we need exclusive access to the privmac struct */ ret = mac802154_takesem(&priv->exclsem); if (ret < 0) { wlerr("ERROR: mac802154_takesem failed: %d\n", ret); return ret; } /* If both destination and source addressing information is present, the MAC * sublayer shall compare the destination and source PAN identifiers. * [1] pg. 41. */ if (meta->src_addrmode != IEEE802154_ADDRMODE_NONE && meta->dest_addr.mode != IEEE802154_ADDRMODE_NONE) { /* If the PAN identifiers are identical, the PAN ID Compression field * shall be set to one, and the source PAN identifier shall be omitted * from the transmitted frame. [1] pg. 41. */ if (meta->dest_addr.panid == priv->addr.panid) { *frame_ctrl |= IEEE802154_FRAMECTRL_PANIDCOMP; } } if (meta->src_addrmode != IEEE802154_ADDRMODE_NONE) { /* If the destination address is not included, or if PAN ID Compression * is off, we need to include the Source PAN ID. */ if ((meta->dest_addr.mode == IEEE802154_ADDRMODE_NONE) || (!(*frame_ctrl & IEEE802154_FRAMECTRL_PANIDCOMP))) { memcpy(&frame->io_data[mhr_len], &priv->addr.panid, 2); mhr_len += 2; } if (meta->src_addrmode == IEEE802154_ADDRMODE_SHORT) { memcpy(&frame->io_data[mhr_len], &priv->addr.saddr, 2); mhr_len += 2; } else if (meta->src_addrmode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&frame->io_data[mhr_len], &priv->addr.eaddr, IEEE802154_EADDR_LEN); mhr_len += IEEE802154_EADDR_LEN; } } /* Set the source addr mode inside the frame control field */ *frame_ctrl |= (meta->src_addrmode << IEEE802154_FRAMECTRL_SHIFT_SADDR); /* 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. */ frame->io_data[2] = priv->dsn++; /* The MAC header we just created must never have exceeded where the app * data starts. This should never happen since the offset should have * been set via the same logic to calculate the header length as the logic * here that created the header */ DEBUGASSERT(mhr_len == frame->io_offset); frame->io_offset = 0; /* Set the offset to 0 to include the header */ /* Setup our transaction */ trans.handle = meta->msdu_handle; trans.frametype = IEEE802154_FRAME_DATA; trans.frame = frame; sem_init(&trans.sem, 0, 0); sem_setprotocol(&trans.sem, SEM_PRIO_NONE); /* If the TxOptions parameter specifies that a GTS transmission is required, * the MAC sublayer will determine whether it has a valid GTS as described * 5.1.7.3. If a valid GTS could not be found, the MAC sublayer will discard * the MSDU. If a valid GTS was found, the MAC sublayer will defer, if * necessary, until the GTS. If the TxOptions parameter specifies that a GTS * transmission is not required, the MAC sublayer will transmit the MSDU using * either slotted CSMA-CA in the CAP for a beacon-enabled PAN or unslotted * CSMA-CA for a nonbeacon-enabled PAN. Specifying a GTS transmission in the * TxOptions parameter overrides an indirect transmission request. * [1] pg. 118. */ if (meta->msdu_flags.gts_tx) { /* TODO: Support GTS transmission. This should just change where we link * the transaction. Instead of going in the CSMA transaction list, it * should be linked to the GTS' transaction list. We'll need to check if * the GTS is valid, and then find the GTS, before linking. Note, we also * don't have to try and kick-off any transmission here. */ return -ENOTSUP; } else { /* If the TxOptions parameter specifies that an indirect transmission is * required and this primitive is received by the MAC sublayer of a * coordinator, the data frame is sent using indirect transmission, as * described in 5.1.5 and 5.1.6.3. [1] */ if (meta->msdu_flags.indirect_tx) { /* If the TxOptions parameter specifies that an indirect transmission * is required and if the device receiving this primitive is not a * coordinator, the destination address is not present, or the * TxOptions parameter also specifies a GTS transmission, the indirect * transmission option will be ignored. [1] * * NOTE: We don't just ignore the parameter. Instead, we throw an * error, since this really shouldn't be happening. */ if (priv->devmode == IEEE802154_DEVMODE_PANCOORD && meta->dest_addr.mode != IEEE802154_ADDRMODE_NONE) { /* Link the transaction into the indirect_trans list */ } else { return -EINVAL; } } else { /* Link the transaction into the CSMA transaction list */ sq_addlast((FAR sq_entry_t *)&trans, &priv->csma_queue); /* We no longer need to have the MAC layer locked. */ mac802154_givesem(&priv->exclsem); /* Notify the radio driver that there is data available */ priv->radio->ops->txnotify_csma(priv->radio); ret = sem_wait(&trans.sem); if (ret < 0) { return -EINTR; } } } sem_destroy(&trans.sem); return OK; } /**************************************************************************** * Name: mac802154_req_purge * * Description: * The MCPS-PURGE.request primitive allows the next higher layer to purge * an MSDU from the transaction queue. Confirmation is returned via * the struct mac802154_maccb_s->conf_purge callback. * * NOTE: The standard specifies that confirmation should be indicated via * the asynchronous MLME-PURGE.confirm primitve. However, in our * implementation we synchronously return the status from the request. * Therefore, we merge the functionality of the MLME-PURGE.request and * MLME-PURGE.confirm primitives together. * ****************************************************************************/ int mac802154_req_purge(MACHANDLE mac, uint8_t msdu_handle) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * 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. * ****************************************************************************/ 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 mac802154_txtrans_s trans; FAR struct iob_s *iob; FAR uint16_t *u16; bool rxonidle; int ret; /* 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 */ /* Get exlusive access to the shared command transaction. 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. */ if (sem_wait(&priv->cmd.sem) < 0) { /* EINTR is the only error that we expect */ int errcode = get_errno(); DEBUGASSERT(errcode == EINTR); return -errcode; } /* Get exclusive access to the MAC */ ret = mac802154_takesem(&priv->exclsem); if (ret < 0) { wlerr("ERROR: mac802154_takesem failed: %d\n", ret); return ret; } /* Set the channel and channel page of the PHY layer */ priv->radio->ops->set_attr(priv->radio, IEEE802154_PIB_PHY_CURRENT_CHANNEL, (FAR const union ieee802154_attr_u *)&req->chnum); priv->radio->ops->set_attr(priv->radio, IEEE802154_PIB_PHY_CURRENT_PAGE, (FAR const union ieee802154_attr_u *)&req->chpage); /* Set the PANID attribute */ priv->addr.panid = req->coordaddr.panid; priv->coordaddr.panid = req->coordaddr.panid; priv->radio->ops->set_attr(priv->radio, IEEE802154_PIB_MAC_PANID, (FAR const union ieee802154_attr_u *)&req->coordaddr.panid); /* Set the coordinator address attributes */ priv->coordaddr.mode = req->coordaddr.mode; if (priv->coordaddr.mode == IEEE802154_ADDRMODE_SHORT) { priv->coordaddr.saddr = req->coordaddr.saddr; memcpy(&priv->coordaddr.eaddr[0], IEEE802154_EADDR_UNSPEC, IEEE802154_EADDR_LEN); } else if (priv->coordaddr.mode == IEEE802154_ADDRMODE_EXTENDED) { priv->coordaddr.saddr = IEEE802154_SADDR_UNSPEC; memcpy(&priv->coordaddr.eaddr[0], &req->coordaddr.eaddr[0], IEEE802154_EADDR_LEN); } else { ret = -EINVAL; goto errout; } /* 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->ops->set_attr(priv->radio, IEEE802154_PIB_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; /* Get a uin16_t reference to the first two bytes. ie frame control field */ u16 = (FAR uint16_t *)&iob->io_data[0]; *u16 = (IEEE802154_FRAME_COMMAND << IEEE802154_FRAMECTRL_SHIFT_FTYPE); *u16 |= IEEE802154_FRAMECTRL_ACKREQ; *u16 |= (priv->coordaddr.mode << IEEE802154_FRAMECTRL_SHIFT_DADDR); *u16 |= (IEEE802154_ADDRMODE_EXTENDED << IEEE802154_FRAMECTRL_SHIFT_SADDR); 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 */ memcpy(&iob->io_data[iob->io_len], &priv->coordaddr.panid, 2); /* 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) { memcpy(&iob->io_data[iob->io_len], &priv->coordaddr.saddr, 2); iob->io_len += 2; } else if (priv->coordaddr.mode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&iob->io_data[iob->io_len], &priv->coordaddr.eaddr[0], IEEE802154_EADDR_LEN); iob->io_len += IEEE802154_EADDR_LEN; } /* The Source PAN Identifier field shall contain the broadcast PAN identifier.*/ u16 = (uint16_t *)&iob->io_data[iob->io_len]; *u16 = IEEE802154_SADDR_BCAST; iob->io_len += 2; /* The Source Address field shall contain the value of macExtendedAddress. */ memcpy(&iob->io_data[iob->io_len], &priv->addr.eaddr[0], IEEE802154_EADDR_LEN); iob->io_len += IEEE802154_EADDR_LEN; /* 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++; /* Copy reference to the frame into the shared command transaction */ priv->cmd.trans.frame = iob; priv->cmd.trans.frametype = IEEE802154_FRAME_COMMAND; priv->cmd.type = IEEE802154_CMD_ASSOC_REQ; /* Link the transaction into the CSMA transaction list */ sq_addlast((FAR sq_entry_t *)&trans, &priv->csma_queue); /* We no longer need to have the MAC layer locked. */ mac802154_givesem(&priv->exclsem); /* TODO: Need to setup a timeout here so that we can return an error to the * user if the device never receives a response. */ /* Notify the radio driver that there is data available */ priv->radio->ops->txnotify_csma(priv->radio); /* Wait for the transaction to be passed to the radio layer */ ret = sem_wait(&priv->cmd.trans.sem); if (ret < 0) { return -EINTR; } return OK; errout: mac802154_givesem(&priv->exclsem); return ret; } /**************************************************************************** * Name: mac802154_req_disassociate * * Description: * The MLME-DISASSOCIATE.request primitive is used by an associated device to * notify the coordinator of its intent to leave the PAN. It is also used by * the coordinator to instruct an associated device to leave the PAN. * Confirmation is returned via the * struct mac802154_maccb_s->conf_disassociate callback. * ****************************************************************************/ int mac802154_req_disassociate(MACHANDLE mac, FAR struct ieee802154_disassoc_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_gts * * Description: * The MLME-GTS.request primitive allows a device to send a request to the PAN * coordinator to allocate a new GTS or to deallocate an existing GTS. * Confirmation is returned via the * struct mac802154_maccb_s->conf_gts callback. * ****************************************************************************/ int mac802154_req_gts(MACHANDLE mac, FAR struct ieee802154_gts_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_reset * * Description: * The MLME-RESET.request primitive allows the next higher layer to request * that the MLME performs a reset operation. * * NOTE: The standard specifies that confirmation should be provided via * via the asynchronous MLME-RESET.confirm primitve. However, in our * implementation we synchronously return the value immediately. Therefore, * we merge the functionality of the MLME-RESET.request and MLME-RESET.confirm * primitives together. * * Input Parameters: * mac - Handle to the MAC layer instance * rst_pibattr - Whether or not to reset the MAC PIB attributes to defaults * ****************************************************************************/ int mac802154_req_reset(MACHANDLE mac, bool rst_pibattr) { FAR struct ieee802154_privmac_s * priv = (FAR struct ieee802154_privmac_s *) mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_rxenable * * Description: * The MLME-RX-ENABLE.request primitive allows the next higher layer to * request that the receiver is enable for a finite period of time. * Confirmation is returned via the * struct mac802154_maccb_s->conf_rxenable callback. * ****************************************************************************/ int mac802154_req_rxenable(MACHANDLE mac, FAR struct ieee802154_rxenable_req_s *req) { FAR struct ieee802154_privmac_s * priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_scan * * Description: * The MLME-SCAN.request primitive is used to initiate a channel scan over a * given list of channels. A device can use a channel scan to measure the * energy on the channel, search for the coordinator with which it associated, * or search for all coordinators transmitting beacon frames within the POS of * the scanning device. Scan results are returned * via MULTIPLE calls to the struct mac802154_maccb_s->conf_scan callback. * This is a difference with the official 802.15.4 specification, implemented * here to save memory. * ****************************************************************************/ int mac802154_req_scan(MACHANDLE mac, FAR struct ieee802154_scan_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_get * * Description: * The MLME-GET.request primitive requests information about a given PIB * attribute. * * NOTE: The standard specifies that the attribute value should be returned * via the asynchronous MLME-GET.confirm primitve. However, in our * implementation, we synchronously return the value immediately.Therefore, we * merge the functionality of the MLME-GET.request and MLME-GET.confirm * primitives together. * ****************************************************************************/ int mac802154_req_get(MACHANDLE mac, enum ieee802154_pib_attr_e pib_attr, FAR union ieee802154_attr_u *attrval) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_set * * Description: * The MLME-SET.request primitive attempts to write the given value to the * indicated MAC PIB attribute. * * NOTE: The standard specifies that confirmation should be indicated via * the asynchronous MLME-SET.confirm primitve. However, in our implementation * we synchronously return the status from the request. Therefore, we do merge * the functionality of the MLME-SET.request and MLME-SET.confirm primitives * together. * ****************************************************************************/ int mac802154_req_set(MACHANDLE mac, enum ieee802154_pib_attr_e pib_attr, FAR const union ieee802154_attr_u *attrval) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; int ret; switch (pib_attr) { case IEEE802154_PIB_MAC_EXTENDED_ADDR: { /* Set the MAC copy of the address in the table */ memcpy(&priv->addr.eaddr[0], &attrval->mac.eaddr[0], IEEE802154_EADDR_LEN); /* Tell the radio about the attribute */ priv->radio->ops->set_attr(priv->radio, pib_attr, attrval); ret = IEEE802154_STATUS_SUCCESS; } break; default: { /* The attribute may be handled soley in the radio driver, so pass * it along. */ ret = priv->radio->ops->set_attr(priv->radio, pib_attr, attrval); } break; } return ret; } /**************************************************************************** * Name: mac802154_req_start * * Description: * The MLME-START.request primitive makes a request for the device to start * using a new superframe configuration. Confirmation is returned * via the struct mac802154_maccb_s->conf_start callback. * ****************************************************************************/ int mac802154_req_start(MACHANDLE mac, FAR struct ieee802154_start_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; int ret; /* Get exclusive access to the MAC */ ret = mac802154_takesem(&priv->exclsem); if (ret < 0) { wlerr("ERROR: mac802154_takesem failed: %d\n", ret); return ret; } /* When the CoordRealignment parameter is set to TRUE, the coordinator * attempts to transmit a coordinator realignment command frame as described * in 5.1.2.3.2. If the transmission of the coordinator realignment command * fails due to a channel access failure, the MLME will not make any changes * to the superframe configuration. (i.e., no PIB attributes will be changed). * If the coordinator realignment command is successfully transmitted, the * MLME updates the PIB attributes BeaconOrder, SuperframeOrder, PANId, * ChannelPage, and ChannelNumber parameters. [1] pg. 106 */ if (req->coordrealign) { /* TODO: Finish the realignment functionality */ return -ENOTTY; } /* Set the PANID attribute */ priv->addr.panid = req->panid; priv->radio->ops->set_attr(priv->radio, IEEE802154_PIB_MAC_PANID, (FAR const union ieee802154_attr_u *)&req->panid); /* Set the radio attributes */ priv->radio->ops->set_attr(priv->radio, IEEE802154_PIB_PHY_CURRENT_CHANNEL, (FAR const union ieee802154_attr_u *)&req->chnum); priv->radio->ops->set_attr(priv->radio, IEEE802154_PIB_PHY_CURRENT_PAGE, (FAR const union ieee802154_attr_u *)&req->chpage); /* Set the superframe order */ if(req->superframeorder > 15) { ret = -EINVAL; goto errout; } priv->superframeorder = req->superframeorder; /* Set the beacon order */ if(req->beaconorder > 15) { ret = -EINVAL; goto errout; } priv->beaconorder = req->beaconorder; if (req->pancoord) { priv->devmode = IEEE802154_DEVMODE_PANCOORD; } else { priv->devmode = IEEE802154_DEVMODE_COORD; } /* If the BeaconOrder parameter is less than 15, the MLME sets macBattLifeExt to * the value of the BatteryLifeExtension parameter. If the BeaconOrder parameter * equals 15, the value of the BatteryLifeExtension parameter is ignored. * [1] pg. 106 */ if (priv->beaconorder < 15) { priv->battlifeext = req->battlifeext; /* TODO: Finish starting beacon enabled network */ return -ENOTTY; } mac802154_givesem(&priv->exclsem); return OK; errout: mac802154_givesem(&priv->exclsem); return ret; } /**************************************************************************** * Name: mac802154_req_sync * * Description: * The MLME-SYNC.request primitive requests to synchronize with the * coordinator by acquiring and, if specified, tracking its beacons. * Confirmation is returned via the * struct mac802154_maccb_s->int_commstatus callback. TOCHECK. * ****************************************************************************/ int mac802154_req_sync(MACHANDLE mac, FAR struct ieee802154_sync_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_req_poll * * Description: * The MLME-POLL.request primitive prompts the device to request data from * the coordinator. Confirmation is returned via the * struct mac802154_maccb_s->conf_poll callback, followed by a * struct mac802154_maccb_s->ind_data callback. * ****************************************************************************/ int mac802154_req_poll(MACHANDLE mac, FAR struct ieee802154_poll_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * 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; return -ENOTTY; } /**************************************************************************** * Name: mac802154_resp_orphan * * Description: * The MLME-ORPHAN.response primitive allows the next higher layer of a * coordinator to respond to the MLME-ORPHAN.indication primitive. * ****************************************************************************/ int mac802154_resp_orphan(MACHANDLE mac, FAR struct ieee802154_orphan_resp_s *resp) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * Name: mac802154_notif_free * * Description: * When the MAC calls the registered callback, it passes a reference * to a mac802154_notify_s structure. This structure needs to be freed * after the callback handler is done using it. * ****************************************************************************/ int mac802154_notif_free(MACHANDLE mac, FAR struct ieee802154_notif_s *notif) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; /* Get exclusive access to the MAC */ while(mac802154_takesem(&priv->exclsem) < 0); notif->flink = priv->notif_free; priv->notif_free = notif; mac802154_givesem(&priv->exclsem); if (priv->csma_tryagain) { priv->csma_tryagain = false; priv->radio->ops->txnotify_csma(priv->radio); } if (priv->gts_tryagain) { priv->gts_tryagain = false; priv->radio->ops->txnotify_gts(priv->radio); } return -ENOTTY; }