/**************************************************************************** * wireless/ieee802154/mac802154.c * * Copyright (C) 2016 Sebastien Lorquet. All rights reserved. * Author: Sebastien Lorquet * * 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 #include "mac802154.h" /**************************************************************************** * 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 /**************************************************************************** * Private Types ****************************************************************************/ struct mac802154_trans_s { /* Supports a singly linked list */ FAR struct mac802154_trans_s *flink; FAR struct iob_s *frame; uint8_t msdu_handle; 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 ieee802154_maccb_s *cb; /* Contained MAC callbacks */ FAR struct mac802154_radiocb_s radiocb; /* Interface to bind to radio */ sem_t exclsem; /* Support exclusive access */ 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. */ FAR struct mac802154_trans_s *csma_head; FAR struct mac802154_trans_s *csma_tail; /* 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. */ FAR struct mac802154_trans_s *indirect_head; FAR struct mac802154_trans_s *indirect_tail; uint8_t txdesc_count; struct ieee802154_txdesc_s txdesc[CONFIG_IEEE802154_NTXDESC]; /* Support a singly linked list of frames received */ FAR struct iob_s *rxframes_head; FAR struct iob_s *rxframes_tail; /* 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 coord_addr; /* 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_wait_dur; /* 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_wait_time; /* The maximum time (in unit periods) that a transaction is stored by a * coordinator and indicated in its beacon. */ uint16_t trans_persist_time; /* Contents of beacon payload */ uint8_t beacon_payload[IEEE802154_MAX_BEACON_PAYLOAD_LENGTH]; uint8_t beacon_payload_len; /* Length of beacon payload */ uint8_t batt_life_ext_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 max_retries; /* 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_wait_time; /* The total transmit duration (including PHY header and FCS) specified in * symbols. [1] pg. 129. */ uint32_t tx_total_dur; /* Start of 32-bit bitfield */ uint32_t is_assoc : 1; /* Are we associated to the PAN */ uint32_t assoc_permit : 1; /* Are we allowing assoc. as a coord. */ uint32_t auto_req : 1; /* Automatically send data req. if addr * addr is in the beacon frame */ uint32_t batt_life_ext : 1; /* Is BLE enabled */ uint32_t gts_permit : 1; /* Is PAN Coord. accepting GTS reqs. */ uint32_t promiscuous_mode : 1; /* Is promiscuous mode on? */ uint32_t ranging_supported : 1; /* Does MAC sublayer support ranging */ uint32_t rx_when_idle : 1; /* Recvr. on during idle periods */ uint32_t sec_enabled : 1; /* Does MAC sublayer have security en. */ uint32_t max_csma_backoffs : 3; /* Max num backoffs for CSMA algorithm * before declaring ch access failure */ uint32_t beacon_order : 4; /* Freq. that beacon is transmitted */ uint32_t superframe_order : 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_symb_offset : 12; /* End of 32-bit bitfield */ /* Start of 32-bit bitfield */ uint32_t beacon_tx_time : 24; /* Time of last beacon transmit */ uint32_t min_be : 4; /* Min value of backoff exponent (BE) */ uint32_t max_be : 4; /* Max value of backoff exponent (BE) */ /* End of 32-bit bitfield */ /* Start of 32-bit bitfield */ uint32_t tx_ctrl_active_dur : 17; /* Duration for which tx is permitted to * be active */ uint32_t tx_ctrl_pause_dur : 1; /* Duration after tx before another tx is * permitted. 0=2000, 1= 10000 */ uint32_t timestamp_support : 1; /* Does MAC layer supports timestamping */ uint32_t is_coord : 1; /* Is this device acting as coordinator */ /* 12-bits remaining */ /* End of 32-bit bitfield. */ /* TODO: Add Security-related MAC PIB attributes */ }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ static inline int mac802154_takesem(sem_t *sem); #define mac802154_givesem(s) sem_post(s); static void mac802154_txdone_worker(FAR void *arg); static void mac802154_rxframe_worker(FAR void *arg); /* Internal Functions */ static int mac802154_defaultmib(FAR struct ieee802154_privmac_s *priv); static int mac802154_applymib(FAR struct ieee802154_privmac_s *priv); /* 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 const struct ieee802154_rxdesc_s *rx_desc, FAR struct iob_s *frame); /**************************************************************************** * Private Data ****************************************************************************/ /* Map between ieee802154_addr_mode_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_push_csma * * Description: * Push a CSMA transaction onto the list * ****************************************************************************/ static void mac802154_push_csma(FAR struct ieee802154_privmac_s *priv, FAR struct mac802154_trans_s *trans) { /* Ensure the transactions forward link is NULL */ trans->flink = NULL; /* If the tail is not empty, make the transaction pointed to by the tail, * point to the new transaction */ if (priv->csma_tail != NULL) { priv->csma_tail->flink = trans; } /* Point the tail at the new transaction */ priv->csma_tail = trans; /* If the head is NULL, we need to point it at the transaction since there * is only one transaction in the list at this point */ if (priv->csma_head == NULL) { priv->csma_head = trans; } } /**************************************************************************** * Name: mac802154_pop_csma * * Description: * Pop a CSMA transaction from the list * ****************************************************************************/ static FAR struct mac802154_trans_s * mac802154_pop_csma(FAR struct ieee802154_privmac_s *priv) { FAR struct mac802154_trans_s *trans; if (priv->csma_head == NULL) { return NULL; } /* Get the transaction from the head of the list */ trans = priv->csma_head; /* Move the head pointer to the next transaction */ priv->csma_head = trans->flink; /* If the head is now NULL, the list is empty, so clear the tail too */ if (priv->csma_head == NULL) { priv->csma_tail = NULL; } return trans; } /**************************************************************************** * Name: mac802154_defaultmib * * Description: * Set the MIB to its default values. * ****************************************************************************/ static int mac802154_defaultmib(FAR struct ieee802154_privmac_s *priv) { /* TODO: Set all MAC fields to default values */ 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 *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_trans_s *trans; 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 = mac802154_pop_csma(priv); mac802154_givesem(&priv->exclsem); if (trans != NULL) { /* Setup the transmit descriptor */ tx_desc->handle = trans->msdu_handle; *frame = trans->frame; /* 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); } 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_trans_s *trans; 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; } /**************************************************************************** * 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 *tx_desc) { 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); /* Check to see if there is an available tx descriptor slot. If there is * not we simply drop the notification */ if (priv->txdesc_count < CONFIG_IEEE802154_NTXDESC) { /* Copy the txdesc over and link it into our list */ memcpy(&priv->txdesc[priv->txdesc_count++], tx_desc, sizeof(struct ieee802154_txdesc_s)); } else { wlinfo("MAC802154: No room for TX Desc.\n"); } 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; int i = 0; /* 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); /* For each pending TX descriptor, send an application callback */ for (i = 0; i < priv->txdesc_count; i++) { priv->cb->mcps_notify(priv->cb, IEEE802154_NOTIFY_CONF_DATA, (FAR const union ieee802154_mcps_notify_u *) &priv->txdesc[i]); } /* We've handled all the descriptors and no further desc could have been added * since we have the struct locked */ priv->txdesc_count = 0; mac802154_givesem(&priv->exclsem); } /**************************************************************************** * 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 const struct ieee802154_rxdesc_s *rx_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 ieee802154_rxdesc_s *desc; 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); /* TODO: Copy the frame descriptor to some type of list */ /* Push the iob onto the tail of the frame list for processing */ priv->rxframes_tail->io_flink = frame; priv->rxframes_tail = frame; 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; /* 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); /* 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); 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 ieee802154_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; DEBUGASSERT(priv != NULL); /* Check for IOCTLs aimed at the IEEE802.15.4 MAC layer */ if (_MAC802154IOCVALID(cmd)) { /* Handle the MAC IOCTL command */ #warning Missing logic } /* No, other IOCTLs must be aimed at the IEEE802.15.4 radio layer */ else { DEBUGASSERT(priv->radio != NULL && priv->radio->ops != NULL && priv->radio->ops->ioctl != NULL); ret = priv->radio->ops->ioctl(priv->radio, cmd, arg); } 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 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_addr_mode == IEEE802154_ADDRMODE_NONE) { return -EINVAL; } /* The source address can only be set to NONE if the device is the PAN coord */ if (meta->src_addr_mode == IEEE802154_ADDRMODE_NONE && !priv->is_coord) { 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_addr_mode]; /* 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_addr_mode != 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_addr_mode != 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 ieee802154_maccb_s->conf_data callback. * ****************************************************************************/ int mac802154_req_data(MACHANDLE mac, FAR struct ieee802154_data_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; FAR struct mac802154_trans_s trans; FAR struct ieee802154_frame_meta_s *meta = req->meta; uint16_t *frame_ctrl; uint8_t mhr_len = 3; /* Start assuming frame control and seq. num */ int ret; /* Check the required frame size */ if (req->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 = (uint16_t *)&req->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 (meta->msdu_length > 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(&req->frame->io_data[mhr_len], &meta->dest_addr.panid, 2); mhr_len += 2; if (meta->dest_addr.mode == IEEE802154_ADDRMODE_SHORT) { memcpy(&req->frame->io_data[mhr_len], &meta->dest_addr.saddr, 2); mhr_len += 2; } else if (meta->dest_addr.mode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&req->frame->io_data[mhr_len], &meta->dest_addr.eaddr, 8); mhr_len += 8; } } /* 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_addr_mode != 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_addr_mode != 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(&req->frame->io_data[mhr_len], &priv->addr.panid, 2); mhr_len += 2; } if (meta->src_addr_mode == IEEE802154_ADDRMODE_SHORT) { memcpy(&req->frame->io_data[mhr_len], &priv->addr.saddr, 2); mhr_len += 2; } else if (meta->src_addr_mode == IEEE802154_ADDRMODE_EXTENDED) { memcpy(&req->frame->io_data[mhr_len], &priv->addr.eaddr, 8); mhr_len += 8; } } /* Set the source addr mode inside the frame control field */ *frame_ctrl |= (meta->src_addr_mode << 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. */ req->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 == req->frame->io_offset); req->frame->io_offset = 0; /* Set the offset to 0 to include the header */ /* Setup our transaction */ trans.msdu_handle = meta->msdu_handle; trans.frame = req->frame; sem_init(&trans.sem, 0, 1); /* 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] */ if (priv->is_coord && meta->dest_addr.mode != IEEE802154_ADDRMODE_NONE) { /* Link the transaction into the indirect_trans list */ } else { /* Override the setting since it wasn't valid */ meta->msdu_flags.indirect_tx = 0; } } /* If this is a direct transmission not during a GTS */ if (!meta->msdu_flags.indirect_tx) { /* Link the transaction into the CSMA transaction list */ mac802154_push_csma(priv, &trans); /* 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); sem_wait(&trans.sem); } } 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 ieee802154_maccb_s->conf_purge callback. * ****************************************************************************/ int mac802154_req_purge(MACHANDLE mac, FAR struct ieee802154_purge_req_s *req) { 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 ieee802154_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; /* Set the channel of the PHY layer */ /* Set the channel page of the PHY layer */ /* Set the macPANId */ /* Set either the macCoordExtendedAddress and macCoordShortAddress * depending on the CoordAddrMode in the primitive. */ if (req->coord_addr.mode == IEEE802154_ADDRMODE_EXTENDED) { } else if (req->coord_addr.mode == IEEE802154_ADDRMODE_EXTENDED) { } else { return -EINVAL; } return -ENOTTY; } /**************************************************************************** * 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 ieee802154_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_get * * Description: * The MLME-GET.request primitive requests information about a given PIB * attribute. Actual data is returned via the * struct ieee802154_maccb_s->conf_get callback. * ****************************************************************************/ int mac802154_req_get(MACHANDLE mac, FAR struct ieee802154_get_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 ieee802154_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. Confirmation is returned via * the struct ieee802154_maccb_s->conf_reset callback. * ****************************************************************************/ int mac802154_req_reset(MACHANDLE mac, FAR struct ieee802154_reset_req_s *req) { 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 ieee802154_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 ieee802154_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_set * * Description: * The MLME-SET.request primitive attempts to write the given value to the * indicated MAC PIB attribute. Confirmation is returned via the * struct ieee802154_maccb_s->conf_set callback. * ****************************************************************************/ int mac802154_req_set(MACHANDLE mac, FAR struct ieee802154_set_req_s *req) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; } /**************************************************************************** * 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 ieee802154_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; return -ENOTTY; } /**************************************************************************** * 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 ieee802154_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 ieee802154_maccb_s->conf_poll callback, followed by a * struct ieee802154_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_rsp_associate * * Description: * The MLME-ASSOCIATE.response primitive is used to initiate a response to * an MLME-ASSOCIATE.indication primitive. * ****************************************************************************/ int mac802154_rsp_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_rsp_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_rsp_orphan(MACHANDLE mac, FAR struct ieee802154_orphan_resp_s *resp) { FAR struct ieee802154_privmac_s *priv = (FAR struct ieee802154_privmac_s *)mac; return -ENOTTY; }