/**************************************************************************** * wireless/ieee802154/mac802154_netdev.c * * Copyright (C) 2017 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #include #include #include #include #include #include #include #include #include "mac802154.h" #ifdef CONFIG_NET_6LOWPAN /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* 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 selected work queue */ # if defined(CONFIG_IEEE802154_NETDEV_HPWORK) # define WPANWORK HPWORK # elif defined(CONFIG_IEEE802154_NETDEV_LPWORK) # define WPANWORK LPWORK # else # error Neither CONFIG_IEEE802154_NETDEV_HPWORK nor CONFIG_IEEE802154_NETDEV_LPWORK defined # endif #endif /* CONFIG_IEEE802154_NETDEV_NINTERFACES determines the number of physical interfaces * that will be supported. */ #ifndef CONFIG_IEEE802154_NETDEV_NINTERFACES # define CONFIG_IEEE802154_NETDEV_NINTERFACES 1 #endif /* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per second */ #define TXPOLL_WDDELAY (1*CLK_TCK) /**************************************************************************** * Private Types ****************************************************************************/ /* This is our private version of the MAC callback stucture */ struct macnet_callback_s { /* This holds the information visible to the MAC layer */ struct mac802154_maccb_s mc_cb; /* Interface understood by the MAC layer */ FAR struct macnet_driver_s *mc_priv; /* Our priv data */ }; /* The macnet_driver_s encapsulates all state information for a single * IEEE802.15.4 MAC interface. */ struct macnet_driver_s { /* This holds the information visible to the NuttX network */ struct ieee802154_driver_s md_dev; /* Interface understood by the network */ /* For internal use by this driver */ struct macnet_callback_s md_cb; /* Callback information */ MACHANDLE md_mac; /* Contained MAC interface */ bool md_bifup; /* true:ifup false:ifdown */ WDOG_ID md_txpoll; /* TX poll timer */ struct work_s md_pollwork; /* Defer poll work to the work queue */ }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* IEE802.15.4 MAC callback functions ***************************************/ static void macnet_notify(FAR const struct mac802154_maccb_s *maccb, FAR struct ieee802154_notif_s *notif); static void macnet_rxframe(FAR const struct mac802154_maccb_s *maccb, FAR struct ieee802154_data_ind_s *ind); /* Asynchronous confirmations to requests */ static void macnet_conf_data(FAR struct macnet_driver_s *priv, FAR const struct ieee802154_data_conf_s *conf); static void macnet_conf_associate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_assoc_conf_s *conf); static void macnet_conf_disassociate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_disassoc_conf_s *conf); static void macnet_conf_gts(FAR struct macnet_driver_s *priv, FAR struct ieee802154_gts_conf_s *conf); static void macnet_conf_rxenable(FAR struct macnet_driver_s *priv, FAR struct ieee802154_rxenable_conf_s *conf); static void macnet_conf_scan(FAR struct macnet_driver_s *priv, FAR struct ieee802154_scan_conf_s *conf); static void macnet_conf_start(FAR struct macnet_driver_s *priv, FAR struct ieee802154_start_conf_s *conf); static void macnet_conf_poll(FAR struct macnet_driver_s *priv, FAR struct ieee802154_poll_conf_s *conf); /* Asynchronous event indications, replied to synchronously with responses */ static void macnet_ind_associate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_assoc_ind_s *conf); static void macnet_ind_disassociate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_disassoc_ind_s *conf); static void macnet_ind_beaconnotify(FAR struct macnet_driver_s *priv, FAR struct ieee802154_beaconnotify_ind_s *conf); static void macnet_ind_gts(FAR struct macnet_driver_s *priv, FAR struct ieee802154_gts_ind_s *conf); static void macnet_ind_orphan(FAR struct macnet_driver_s *priv, FAR struct ieee802154_orphan_ind_s *conf); static void macnet_ind_commstatus(FAR struct macnet_driver_s *priv, FAR struct ieee802154_commstatus_ind_s *conf); static void macnet_ind_syncloss(FAR struct macnet_driver_s *priv, FAR struct ieee802154_syncloss_ind_s *conf); /* Network interface support ************************************************/ /* Common TX logic */ static int macnet_txpoll_callback(FAR struct net_driver_s *dev); static void macnet_txpoll_work(FAR void *arg); static void macnet_txpoll_expiry(int argc, wdparm_t arg, ...); /* NuttX callback functions */ static int macnet_ifup(FAR struct net_driver_s *dev); static int macnet_ifdown(FAR struct net_driver_s *dev); static void macnet_txavail_work(FAR void *arg); static int macnet_txavail(FAR struct net_driver_s *dev); #if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6) static int macnet_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); #ifdef CONFIG_NET_IGMP static int macnet_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); #endif #endif #ifdef CONFIG_NETDEV_IOCTL static int macnet_ioctl(FAR struct net_driver_s *dev, int cmd, unsigned long arg); #endif static int macnet_get_mhrlen(FAR struct ieee802154_driver_s *netdev, FAR const struct ieee802154_frame_meta_s *meta); static int macnet_req_data(FAR struct ieee802154_driver_s *netdev, FAR const struct ieee802154_frame_meta_s *meta, FAR struct iob_s *framelist); /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: macnet_notify * * Description: * ****************************************************************************/ static void macnet_notify(FAR const struct mac802154_maccb_s *maccb, FAR struct ieee802154_notif_s *notif) { FAR struct macnet_callback_s *cb = (FAR struct macnet_callback_s *)maccb; FAR struct macnet_driver_s *priv; DEBUGASSERT(cb != NULL && cb->mc_priv != NULL); priv = cb->mc_priv; switch (notif->notiftype) { case IEEE802154_NOTIFY_CONF_DATA: { macnet_conf_data(priv, ¬if->u.dataconf); } break; default: break; } } /**************************************************************************** * Name: macnet_rxframe * * Description: * ****************************************************************************/ static void macnet_rxframe(FAR const struct mac802154_maccb_s *maccb, FAR struct ieee802154_data_ind_s *ind) { FAR struct macnet_callback_s *cb = (FAR struct macnet_callback_s *)maccb; FAR struct macnet_driver_s *priv; FAR struct iob_s *iob; DEBUGASSERT(cb != NULL && cb->mc_priv != NULL); priv = cb->mc_priv; /* Extract the IOB containing the frame from the struct ieee802154_data_ind_s */ DEBUGASSERT(priv != NULL && ind != NULL && ind->frame != NULL); iob = ind->frame; ind->frame = NULL; /* Transfer the frame to the network logic */ sixlowpan_input(&priv->md_dev, iob, ind); /* sixlowpan_input() will free the IOB, but we must free the struct * ieee802154_data_ind_s container here. */ ieee802154_ind_free(ind); } /**************************************************************************** * Name: macnet_conf_data * * Description: * Data frame was received by remote device * ****************************************************************************/ static void macnet_conf_data(FAR struct macnet_driver_s *priv, FAR const struct ieee802154_data_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_associate * * Description: * Association request completed * ****************************************************************************/ static void macnet_conf_associate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_assoc_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_disassociate * * Description: * Disassociation request completed * ****************************************************************************/ static void macnet_conf_disassociate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_disassoc_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_gts * * Description: * GTS management completed * ****************************************************************************/ static void macnet_conf_gts(FAR struct macnet_driver_s *priv, FAR struct ieee802154_gts_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_rxenable * * Description: * ****************************************************************************/ static void macnet_conf_rxenable(FAR struct macnet_driver_s *priv, FAR struct ieee802154_rxenable_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_scan * * Description: * ****************************************************************************/ static void macnet_conf_scan(FAR struct macnet_driver_s *priv, FAR struct ieee802154_scan_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_start * * Description: * ****************************************************************************/ static void macnet_conf_start(FAR struct macnet_driver_s *priv, FAR struct ieee802154_start_conf_s *conf) { } /**************************************************************************** * Name: macnet_conf_poll * * Description: * ****************************************************************************/ static void macnet_conf_poll(FAR struct macnet_driver_s *priv, FAR struct ieee802154_poll_conf_s *conf) { } /**************************************************************************** * Name: macnet_ind_associate * * Description: * Association request received * ****************************************************************************/ static void macnet_ind_associate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_assoc_ind_s *ind) { } /**************************************************************************** * Name: macnet_ind_disassociate * * Description: * Disassociation request received * ****************************************************************************/ static void macnet_ind_disassociate(FAR struct macnet_driver_s *priv, FAR struct ieee802154_disassoc_ind_s *ind) { } /**************************************************************************** * Name: macnet_ind_beaconnotify * * Description: * Beacon notification * ****************************************************************************/ static void macnet_ind_beaconnotify(FAR struct macnet_driver_s *priv, FAR struct ieee802154_beaconnotify_ind_s *ind) { } /**************************************************************************** * Name: macnet_ind_gts * * Description: * GTS management request received * ****************************************************************************/ static void macnet_ind_gts(FAR struct macnet_driver_s *priv, FAR struct ieee802154_gts_ind_s *ind) { } /**************************************************************************** * Name: macnet_ind_orphan * * Description: * Orphan device detected * ****************************************************************************/ static void macnet_ind_orphan(FAR struct macnet_driver_s *priv, FAR struct ieee802154_orphan_ind_s *ind) { } /**************************************************************************** * Name: macnet_ind_commstatus * * Description: * ****************************************************************************/ static void macnet_ind_commstatus(FAR struct macnet_driver_s *priv, FAR struct ieee802154_commstatus_ind_s *ind) { } /**************************************************************************** * Name: macnet_ind_syncloss * * Description: * ****************************************************************************/ static void macnet_ind_syncloss(FAR struct macnet_driver_s *priv, FAR struct ieee802154_syncloss_ind_s *ind) { } /**************************************************************************** * Name: macnet_txpoll_callback * * Description: * The transmitter is available, check if the network has any outgoing * packets ready to send. This is a callback from devif_poll(). * devif_poll() may be called: * * 1. When the preceding TX packet send is complete, * 2. When the preceding TX packet send timesout and the interface is reset * 3. During normal TX polling * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * OK on success; a negated errno on failure * * Assumptions: * The network is locked. * ****************************************************************************/ static int macnet_txpoll_callback(FAR struct net_driver_s *dev) { /* If zero is returned, the polling will continue until all connections have * been examined. */ return 0; } /**************************************************************************** * Name: macnet_txpoll_process * * Description: * Perform the periodic poll. This may be called either from watchdog * timer logic or from the worker thread, depending upon the configuration. * * Parameters: * priv - Reference to the driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static inline void macnet_txpoll_process(FAR struct macnet_driver_s *priv) { } /**************************************************************************** * Name: macnet_txpoll_work * * Description: * Perform periodic polling from the worker thread * * Parameters: * arg - The argument passed when work_queue() as called. * * Returned Value: * OK on success * * Assumptions: * The network is locked. * ****************************************************************************/ static void macnet_txpoll_work(FAR void *arg) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)arg; /* Lock the network and serialize driver operations if necessary. * NOTE: Serialization is only required in the case where the driver work * is performed on an LP worker thread and where more than one LP worker * thread has been configured. */ net_lock(); /* Perform the poll */ (void)devif_timer(&priv->md_dev.i_dev, macnet_txpoll_callback); /* Setup the watchdog poll timer again */ (void)wd_start(priv->md_txpoll, TXPOLL_WDDELAY, macnet_txpoll_expiry, 1, (wdparm_t)priv); net_unlock(); } /**************************************************************************** * Name: macnet_txpoll_expiry * * Description: * Periodic timer handler. Called from the timer interrupt handler. * * Parameters: * argc - The number of available arguments * arg - The first argument * * Returned Value: * None * * Assumptions: * Global interrupts are disabled by the watchdog logic. * ****************************************************************************/ static void macnet_txpoll_expiry(int argc, wdparm_t arg, ...) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)arg; /* Schedule to perform the interrupt processing on the worker thread. */ work_queue(WPANWORK, &priv->md_pollwork, macnet_txpoll_work, priv, 0); } /**************************************************************************** * Name: macnet_ifup * * Description: * NuttX Callback: Bring up the IEEE 802.15.4 interface when an IP address * is provided * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int macnet_ifup(FAR struct net_driver_s *dev) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)dev->d_private; #ifdef CONFIG_NET_IPv4 ninfo("Bringing up: %d.%d.%d.%d\n", dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff, (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24); #endif #ifdef CONFIG_NET_IPv6 ninfo("Bringing up: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n", dev->d_ipv6addr[0], dev->d_ipv6addr[1], dev->d_ipv6addr[2], dev->d_ipv6addr[3], dev->d_ipv6addr[4], dev->d_ipv6addr[5], dev->d_ipv6addr[6], dev->d_ipv6addr[7]); #endif /* Initialize PHYs, the IEEE 802.15.4 interface, and setup up IEEE 802.15.4 interrupts */ #warning Missing logic /* Setup up address filtering */ /* Set and activate a timer process */ (void)wd_start(priv->md_txpoll, TXPOLL_WDDELAY, macnet_txpoll_expiry, 1, (wdparm_t)priv); /* Enable the IEEE 802.15.4 radio */ priv->md_bifup = true; return OK; } /**************************************************************************** * Name: macnet_ifdown * * Description: * NuttX Callback: Stop the interface. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * ****************************************************************************/ static int macnet_ifdown(FAR struct net_driver_s *dev) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)dev->d_private; irqstate_t flags; /* Disable interruption */ flags = enter_critical_section(); /* Cancel the TX poll timer and TX timeout timers */ wd_cancel(priv->md_txpoll); /* Put the EMAC in its reset, non-operational state. This should be * a known configuration that will guarantee the macnet_ifup() always * successfully brings the interface back up. */ /* Mark the device "down" */ priv->md_bifup = false; leave_critical_section(flags); return OK; } /**************************************************************************** * Name: macnet_txavail_work * * Description: * Perform an out-of-cycle poll on the worker thread. * * Parameters: * arg - Reference to the NuttX driver state structure (cast to void*) * * Returned Value: * None * * Assumptions: * Called on the higher priority worker thread. * ****************************************************************************/ static void macnet_txavail_work(FAR void *arg) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)arg; /* Lock the network and serialize driver operations if necessary. * NOTE: Serialization is only required in the case where the driver work * is performed on an LP worker thread and where more than one LP worker * thread has been configured. */ net_lock(); /* Ignore the notification if the interface is not yet up */ if (priv->md_bifup) { /* Check if there is room in the hardware to hold another outgoing packet. */ /* If so, then poll the network for new XMIT data */ (void)devif_poll(&priv->md_dev.i_dev, macnet_txpoll_callback); } net_unlock(); } /**************************************************************************** * Name: macnet_txavail * * Description: * Driver callback invoked when new TX data is available. This is a * stimulus perform an out-of-cycle poll and, thereby, reduce the TX * latency. * * Parameters: * dev - Reference to the NuttX driver state structure * * Returned Value: * None * * Assumptions: * Called in normal user mode * ****************************************************************************/ static int macnet_txavail(FAR struct net_driver_s *dev) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)dev->d_private; /* Is our single work structure available? It may not be if there are * pending interrupt actions and we will have to ignore the Tx * availability action. */ if (work_available(&priv->md_pollwork)) { /* Schedule to serialize the poll on the worker thread. */ work_queue(WPANWORK, &priv->md_pollwork, macnet_txavail_work, priv, 0); } return OK; } /**************************************************************************** * Name: macnet_addmac * * Description: * NuttX Callback: Add the specified MAC address to the hardware multicast * address filtering * * Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be added * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6) static int macnet_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)dev->d_private; /* Add the MAC address to the hardware multicast routing table. Not used * with IEEE 802.15.4 radios. */ return -ENOSYS; } #endif /**************************************************************************** * Name: macnet_rmmac * * Description: * NuttX Callback: Remove the specified MAC address from the hardware multicast * address filtering * * Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be removed * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_IGMP static int macnet_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)dev->d_private; /* Remove the MAC address from the hardware multicast routing table Not used * with IEEE 802.15.4 radios. */ return -ENOSYS; } #endif /**************************************************************************** * Name: macnet_ioctl * * Description: * Handle network IOCTL commands directed to this device. * * Parameters: * dev - Reference to the NuttX driver state structure * cmd - The IOCTL command * arg - The argument for the IOCTL command * * Returned Value: * OK on success; Negated errno on failure. * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NETDEV_IOCTL static int macnet_ioctl(FAR struct net_driver_s *dev, int cmd, unsigned long arg) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)dev->d_private; int ret = -EINVAL; /* Check for IOCTLs aimed at the IEEE802.15.4 MAC layer */ if (_MAC802154IOCVALID(cmd)) { FAR struct ieee802154_netmac_s *netmac = (FAR struct ieee802154_netmac_s *)arg; if (netmac != NULL) { unsigned long macarg = (unsigned int)((uintptr_t)&netmac->u); ret = mac802154_ioctl(priv->md_mac, cmd, macarg); } } /* Okay, we have no idea what this command is.. just give to the * IEEE802.15.4 MAC layer without modification. */ else { ret = mac802154_ioctl(priv->md_mac, cmd, arg); } return ret; } #endif /**************************************************************************** * Name: macnet_get_mhrlen * * Description: * Calculate the MAC header length given the frame meta-data. * * Input parameters: * netdev - The networkd device that will mediate the MAC interface * meta - Meta data needed to recreate the MAC header * * Returned Value: * A non-negative MAC headeer length is returned on success; a negated * errno value is returned on any failure. * ****************************************************************************/ static int macnet_get_mhrlen(FAR struct ieee802154_driver_s *netdev, FAR const struct ieee802154_frame_meta_s *meta) { FAR struct macnet_driver_s *priv; DEBUGASSERT(netdev != NULL && netdev->i_dev.d_private != NULL && meta != NULL); priv = (FAR struct macnet_driver_s *)netdev->i_dev.d_private; return mac802154_get_mhrlen(priv->md_mac, meta); } /**************************************************************************** * Name: macnet_req_data * * Description: * Requests the transfer of a list of frames to the MAC. * * Input parameters: * netdev - The networkd device that will mediate the MAC interface * meta - Meta data needed to recreate the MAC header * framelist - Head of a list of frames to be transferred. * * Returned Value: * Zero (OK) returned on success; a negated errno value is returned on * any failure. * ****************************************************************************/ static int macnet_req_data(FAR struct ieee802154_driver_s *netdev, FAR const struct ieee802154_frame_meta_s *meta, FAR struct iob_s *framelist) { FAR struct macnet_driver_s *priv; FAR struct iob_s *iob; int ret; DEBUGASSERT(netdev != NULL && netdev->i_dev.d_private != NULL); priv = (FAR struct macnet_driver_s *)netdev->i_dev.d_private; DEBUGASSERT(meta != NULL && framelist != NULL); /* Add the incoming list of frames to the MAC's outgoing queue */ for (iob = framelist; iob != NULL; iob = framelist) { /* Increment statistics */ NETDEV_TXPACKETS(&priv->md_dev.i_dev); /* Remove the IOB from the queue */ framelist = iob->io_flink; iob->io_flink = NULL; /* Transfer the frame to the MAC */ ret = mac802154_req_data(priv->md_mac, meta, iob); if (ret < 0) { wlerr("ERROR: mac802154_req_data failed: %d\n", ret); iob_free(iob); for (iob = framelist; iob != NULL; iob = framelist) { /* Remove the IOB from the queue and free */ framelist = iob->io_flink; iob_free(iob); } return ret; } } return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: mac802154netdev_register * * Description: * Register a network driver to access the IEEE 802.15.4 MAC layer from * a socket using 6loWPAN * * Input Parameters: * mac - Pointer to the mac layer struct to be registered. * * Returned Values: * Zero (OK) is returned on success. Otherwise a negated errno value is * returned to indicate the nature of the failure. * ****************************************************************************/ int mac802154netdev_register(MACHANDLE mac) { FAR struct macnet_driver_s *priv; FAR struct ieee802154_driver_s *ieee; FAR struct net_driver_s *dev; FAR struct mac802154_maccb_s *maccb; FAR uint8_t *pktbuf; int ret; DEBUGASSERT(mac != NULL); /* Get the interface structure associated with this interface number. */ priv = (FAR struct macnet_driver_s *) kmm_zalloc(sizeof(struct macnet_driver_s)); if (priv == NULL) { nerr("ERROR: Failed to allocate the device structure\n"); return -ENOMEM; } /* Allocate a packet buffer (not used by this driver, but need by the * upper networking layer) */ pktbuf = (FAR uint8_t *)kmm_malloc(CONFIG_NET_6LOWPAN_MTU + CONFIG_NET_GUARDSIZE); if (pktbuf == NULL) { nerr("ERROR: Failed to allocate the packet buffer\n"); kmm_free(priv); return -ENOMEM; } /* Initialize the driver structure */ ieee = &priv->md_dev; dev = &ieee->i_dev; dev->d_buf = pktbuf; /* Single packet buffer */ dev->d_ifup = macnet_ifup; /* I/F up (new IP address) callback */ dev->d_ifdown = macnet_ifdown; /* I/F down callback */ dev->d_txavail = macnet_txavail; /* New TX data callback */ #ifdef CONFIG_NET_IGMP dev->d_addmac = macnet_addmac; /* Add multicast MAC address */ dev->d_rmmac = macnet_rmmac; /* Remove multicast MAC address */ #endif #ifdef CONFIG_NETDEV_IOCTL dev->d_ioctl = macnet_ioctl; /* Handle network IOCTL commands */ #endif dev->d_private = (FAR void *)priv; /* Used to recover private state from dev */ /* Create a watchdog for timing polling for and timing of transmisstions */ priv->md_mac = mac; /* Save the MAC interface instance */ priv->md_txpoll = wd_create(); /* Create periodic poll timer */ DEBUGASSERT(priv->md_txpoll != NULL); /* Initialize the Network frame-related callbacks */ ieee->i_get_mhrlen = macnet_get_mhrlen; /* Get MAC header length */ ieee->i_req_data = macnet_req_data; /* Enqueue frame for transmission */ /* Initialize the MAC callbacks */ priv->md_cb.mc_priv = priv; maccb = &priv->md_cb.mc_cb; maccb->notify = macnet_notify; maccb->rxframe = macnet_rxframe; /* Bind the callback structure */ ret = mac802154_bind(mac, maccb); if (ret < 0) { nerr("ERROR: Failed to bind the MAC callbacks: %d\n", ret); /* Release wdog timers */ wd_delete(priv->md_txpoll); /* Free memory and return the error */ kmm_free(pktbuf); kmm_free(priv); return ret; } /* Put the interface in the down state. */ macnet_ifdown(dev); /* Register the device with the OS so that socket IOCTLs can be performed */ (void)netdev_register(&priv->md_dev.i_dev, NET_LL_IEEE802154); return OK; } #endif /* CONFIG_NET && CONFIG_NET_skeleton */