/**************************************************************************** * wireless/ieee802154/mac802154_netdev.c * * Copyright (C) 2017-2018 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 #include #include #include "mac802154.h" #if defined(CONFIG_NET_6LOWPAN) || defined(CONFIG_NET_IEEE802154) /**************************************************************************** * 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) #endif /* The low priority work queue is preferred. If it is not enabled, LPWORK * will be the same as HPWORK. * * NOTE: However, the network should NEVER run on the high priority work * queue! That queue is intended only to service short back end interrupt * processing that never suspends. Suspending the high priority work queue * may bring the system to its knees! */ #define WPANWORK LPWORK /* 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 /* Preferred address size */ #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR # define MACNET_ADDRSIZE IEEE802154_EADDRSIZE #else # define MACNET_ADDRSIZE IEEE802154_SADDRSIZE #endif /* Frame size */ #if defined(CONFIG_NET_IEEE802154_FRAMELEN) # define MACNET_FRAMELEN CONFIG_NET_IEEE802154_FRAMELEN #else # define MACNET_FRAMELEN IEEE802154_MAX_PHY_PACKET_SIZE #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 structure */ 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 radio_driver_s md_dev; /* Interface understood by the network */ /* Cast compatible with struct macnet_driver_s */ /* For internal use by this driver */ sem_t md_exclsem; /* Exclusive access to struct */ 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 */ /* Hold a list of events */ bool md_enableevents : 1; /* Are events enabled? */ bool md_eventpending : 1; /* Is there a get event using the semaphore? */ sem_t md_eventsem; /* Signaling semaphore for waiting get event */ sq_queue_t primitive_queue; /* For holding primitives to pass along */ /* MAC Service notification information */ bool md_notify_registered; pid_t md_notify_pid; struct sigevent md_notify_event; struct sigwork_s md_notify_work; #ifdef CONFIG_NET_6LOWPAN struct sixlowpan_reassbuf_s md_iobuffer; #endif }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Utility functions ********************************************************/ static int macnet_update_nvaddr(FAR struct net_driver_s *dev); static inline void macnet_netmask(FAR struct net_driver_s *dev); /* IEE802.15.4 MAC callback functions ***************************************/ static int macnet_notify(FAR struct mac802154_maccb_s *maccb, FAR struct ieee802154_primitive_s *primitive); static int macnet_rxframe(FAR struct macnet_driver_s *maccb, FAR struct ieee802154_data_ind_s *ind); /* 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, ...); /* IOCTL support */ #ifdef CONFIG_NET_STARPOINT #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR static int macnet_coord_eaddr(FAR struct radio_driver_s *radio, FAR uint8_t *eaddr); #else static int macnet_coord_saddr(FAR struct radio_driver_s *radio, FAR uint8_t *saddr); #endif #endif /* 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); #ifdef CONFIG_NET_MCASTGROUP static int macnet_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); static int macnet_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac); #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 radio_driver_s *netdev, FAR const void *meta); static int macnet_req_data(FAR struct radio_driver_s *netdev, FAR const void *meta, FAR struct iob_s *framelist); static int macnet_properties(FAR struct radio_driver_s *netdev, FAR struct radiodev_properties_s *properties); /**************************************************************************** * Private Data ****************************************************************************/ /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: macnet_update_nvaddr * * Description: * Advertise the MAC and IPv6 address for this node. * * ****************************************************************************/ static int macnet_update_nvaddr(FAR struct net_driver_s *dev) { FAR struct macnet_driver_s *priv; union ieee802154_macarg_u arg; int ret; DEBUGASSERT(dev != NULL && dev->d_private != NULL); priv = (FAR struct macnet_driver_s *)dev->d_private; #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR uint8_t *eaddr; /* Get the eaddr from the MAC */ arg.getreq.attr = IEEE802154_ATTR_MAC_EADDR; ret = mac802154_ioctl(priv->md_mac, MAC802154IOC_MLME_GET_REQUEST, (unsigned long)((uintptr_t)&arg)); if (ret < 0) { wlerr("ERROR: MAC802154IOC_MLME_GET_REQUEST failed: %d\n", ret); return ret; } else { /* Set the MAC address as the eaddr */ eaddr = arg.getreq.attrval.mac.eaddr; /* Network layers expect address in Network Order (Big Endian) */ dev->d_mac.radio.nv_addr[0] = eaddr[7]; dev->d_mac.radio.nv_addr[1] = eaddr[6]; dev->d_mac.radio.nv_addr[2] = eaddr[5]; dev->d_mac.radio.nv_addr[3] = eaddr[4]; dev->d_mac.radio.nv_addr[4] = eaddr[3]; dev->d_mac.radio.nv_addr[5] = eaddr[2]; dev->d_mac.radio.nv_addr[6] = eaddr[1]; dev->d_mac.radio.nv_addr[7] = eaddr[0]; dev->d_mac.radio.nv_addrlen = IEEE802154_EADDRSIZE; return OK; } #else uint8_t *saddr; /* Get the saddr from the MAC */ arg.getreq.attr = IEEE802154_ATTR_MAC_SADDR; ret = mac802154_ioctl(priv->md_mac, MAC802154IOC_MLME_GET_REQUEST, (unsigned long)((uintptr_t)&arg)); if (ret < 0) { wlerr("ERROR: MAC802154IOC_MLME_GET_REQUEST failed: %d\n", ret); return ret; } else { /* Set the MAC address as the saddr */ saddr = arg.getreq.attrval.mac.saddr; /* Network layers expect address in Network Order (Big Endian) */ dev->d_mac.radio.nv_addr[0] = saddr[1]; dev->d_mac.radio.nv_addr[1] = saddr[0]; dev->d_mac.radio.nv_addrlen = IEEE802154_SADDRSIZE; return OK; } #endif } /**************************************************************************** * Name: macnet_netmask * * Description: * Create a netmask of a MAC-based IP address which may be based on either * the IEEE 802.15.14 short or extended address of the MAC. * * 128 112 96 80 64 48 32 16 * ---- ---- ---- ---- ---- ---- ---- ---- * fe80 0000 0000 0000 0000 00ff fe00 xxxx 2-byte short address IEEE 48-bit MAC * fe80 0000 0000 0000 xxxx xxxx xxxx xxxx 8-byte extended address IEEE EUI-64 * ****************************************************************************/ static inline void macnet_netmask(FAR struct net_driver_s *dev) { dev->d_ipv6netmask[0] = 0xffff; dev->d_ipv6netmask[1] = 0xffff; dev->d_ipv6netmask[2] = 0xffff; dev->d_ipv6netmask[3] = 0xffff; #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR dev->d_ipv6netmask[4] = 0; dev->d_ipv6netmask[5] = 0; dev->d_ipv6netmask[6] = 0; dev->d_ipv6netmask[7] = 0; #else dev->d_ipv6netmask[4] = 0xffff; dev->d_ipv6netmask[5] = 0xffff; dev->d_ipv6netmask[6] = 0xffff; dev->d_ipv6netmask[7] = 0; #endif } /**************************************************************************** * Name: macnet_notify * * Description: * ****************************************************************************/ static int macnet_notify(FAR struct mac802154_maccb_s *maccb, FAR struct ieee802154_primitive_s *primitive) { 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; /* Handle the special case for data indications or "incoming frames" */ if (primitive->type == IEEE802154_PRIMITIVE_IND_DATA) { return macnet_rxframe(priv, &primitive->u.dataind); } /* If there is a registered notification receiver, queue the event and signal * the receiver. Events should be popped from the queue from the application * at a reasonable rate in order for the MAC layer to be able to allocate new * notifications. */ if (priv->md_enableevents) { /* 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 (nxsem_wait(&priv->md_exclsem) < 0); sq_addlast((FAR sq_entry_t *)primitive, &priv->primitive_queue); /* Check if there is a read waiting for data */ if (priv->md_eventpending) { /* Wake the thread waiting for the data transmission */ priv->md_eventpending = false; nxsem_post(&priv->md_eventsem); } if (priv->md_notify_registered) { priv->md_notify_event.sigev_value.sival_int = primitive->type; nxsig_notification(priv->md_notify_pid, &priv->md_notify_event, SI_QUEUE, &priv->md_notify_work); } nxsem_post(&priv->md_exclsem); return OK; } /* By returning a negative value, we let the MAC know that we don't want the * primitive and it will free it for us */ return -1; } /**************************************************************************** * Name: macnet_rxframe * * Description: * Handle received frames forward by the IEEE 802.15.4 MAC. * * Returned Value: * Zero (OK) is returned on success; a negated errno value is returned on * any failure. On success, the ind and its contained iob will be freed. * The ind will be intact if this function returns a failure. * ****************************************************************************/ static int macnet_rxframe(FAR struct macnet_driver_s *priv, FAR struct ieee802154_data_ind_s *ind) { FAR struct iob_s *iob; int ret; /* Ignore the frame if the network is not up */ if (!priv->md_bifup) { wlwarn("WARNING: Dropped... Network is down\n"); return -ENETDOWN; } /* Peek the IOB contained the frame in the struct ieee802154_data_ind_s */ DEBUGASSERT(priv != NULL && ind != NULL && ind->frame != NULL); iob = ind->frame; /* Remove the IOB containing the frame. */ ind->frame = NULL; net_lock(); /* Transfer the frame to the network logic */ #ifdef CONFIG_NET_IEEE802154 /* Invoke the PF_IEEE802154 tap first. If the frame matches * with a connected PF_IEEE802145 socket, it will take the * frame and return success. */ ret = ieee802154_input(&priv->md_dev, iob, (FAR void *)ind); if (ret < 0) #endif #ifdef CONFIG_NET_6LOWPAN { /* If the frame is not a 6LoWPAN frame, then return an error. The * first byte following the MAC head at the io_offset should be a * valid IPHC header. */ if ((iob->io_data[iob->io_offset] & SIXLOWPAN_DISPATCH_NALP_MASK) == SIXLOWPAN_DISPATCH_NALP) { wlwarn("WARNING: Dropped... Not a 6LoWPAN frame: %02x\n", iob->io_data[iob->io_offset]); ret = -EINVAL; } else { /* Make sure the our single packet buffer is attached */ priv->md_dev.r_dev.d_buf = priv->md_iobuffer.rb_buf; /* And give the packet to 6LoWPAN */ ret = sixlowpan_input(&priv->md_dev, iob, (FAR void *)ind); } } if (ret < 0) #endif { net_unlock(); ind->frame = iob; return ret; } /* Increment statistics */ NETDEV_RXPACKETS(&priv->md_dev.r_dev); NETDEV_RXIPV6(&priv->md_dev.r_dev); net_unlock(); /* sixlowpan_input() will free the IOB, but we must free the struct * ieee802154_primitive_s container here. */ ieee802154_primitive_free((FAR struct ieee802154_primitive_s *)ind); return OK; } /**************************************************************************** * 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 * * Input 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_work * * Description: * Perform periodic polling from the worker thread * * Input 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(); #ifdef CONFIG_NET_6LOWPAN /* Make sure the our single packet buffer is attached */ priv->md_dev.r_dev.d_buf = priv->md_iobuffer.rb_buf; #endif /* Then perform the poll */ (void)devif_timer(&priv->md_dev.r_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. * * Input 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_coord_eaddr * * Description: * Get the extended address of the PAN coordinator. * * Input Parameters: * radio - Reference to a radio network driver state instance. * eaddr - The location in which to return the extended address. * * Returned Value: * Zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ #if defined(CONFIG_NET_STARPOINT) && defined(CONFIG_NET_6LOWPAN_EXTENDEDADDR) static int macnet_coord_eaddr(FAR struct radio_driver_s *radio, FAR uint8_t *eaddr) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)radio; union ieee802154_macarg_u arg; int ret; arg.getreq.attr = IEEE802154_ATTR_MAC_COORD_EADDR ; ret = mac802154_ioctl(priv->md_mac, MAC802154IOC_MLME_GET_REQUEST, (unsigned long)((uintptr_t)&arg)); if (ret < 0) { nerr("ERROR: MAC802154IOC_MLME_GET_REQUEST failed: %d\n", ret); return ret; } IEEE802154_EADDRCOPY(eaddr, arg.getreq.attrval.mac.eaddr); return OK; } #endif /**************************************************************************** * Name: macnet_coord_saddr * * Description: * Get the short address of the PAN coordinator. * * Input Parameters: * radio - Reference to a radio network driver state instance. * saddr - The location in which to return the short address. * * Returned Value: * Zero (OK) on success; a negated errno value on failure. * ****************************************************************************/ #if defined(CONFIG_NET_STARPOINT) && !defined(CONFIG_NET_6LOWPAN_EXTENDEDADDR) static int macnet_coord_saddr(FAR struct radio_driver_s *radio, FAR uint8_t *saddr) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)radio; union ieee802154_macarg_u arg; int ret; arg.getreq.attr = IEEE802154_ATTR_MAC_COORD_SADDR ; ret = mac802154_ioctl(priv->md_mac, MAC802154IOC_MLME_GET_REQUEST, (unsigned long)((uintptr_t)&arg)); if (ret < 0) { nerr("ERROR: MAC802154IOC_MLME_GET_REQUEST failed: %d\n", ret); return ret; } IEEE802154_SADDRCOPY(saddr, arg.getreq.attrval.mac.saddr); return OK; } #endif /**************************************************************************** * Name: macnet_ifup * * Description: * Creates a MAC-based IP address from the IEEE 802.15.14 short or extended * address assigned to the node. * * 128 112 96 80 64 48 32 16 * ---- ---- ---- ---- ---- ---- ---- ---- * fe80 0000 0000 0000 0000 00ff fe00 xxxx 2-byte short address IEEE 48-bit MAC * fe80 0000 0000 0000 xxxx xxxx xxxx xxxx 8-byte extended address IEEE EUI-64 * * Input 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; int ret; ret = macnet_update_nvaddr(dev); if (ret == OK) { uint8_t *nvaddr = dev->d_mac.radio.nv_addr; /* Set the IP address based on the addressing assigned to the node */ dev->d_ipv6addr[0] = HTONS(CONFIG_IEEE802154_NETDEV_DEFAULT_PREFIX_0); dev->d_ipv6addr[1] = HTONS(CONFIG_IEEE802154_NETDEV_DEFAULT_PREFIX_1); dev->d_ipv6addr[2] = HTONS(CONFIG_IEEE802154_NETDEV_DEFAULT_PREFIX_2); dev->d_ipv6addr[3] = HTONS(CONFIG_IEEE802154_NETDEV_DEFAULT_PREFIX_3); #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR dev->d_ipv6addr[4] = HTONS((uint16_t)nvaddr[7] << 8 | (uint16_t)nvaddr[6]); dev->d_ipv6addr[5] = HTONS((uint16_t)nvaddr[5] << 8 | (uint16_t)nvaddr[4]); dev->d_ipv6addr[6] = HTONS((uint16_t)nvaddr[3] << 8 | (uint16_t)nvaddr[2]); dev->d_ipv6addr[7] = HTONS((uint16_t)nvaddr[1] << 8 | (uint16_t)nvaddr[0]); /* Invert the U/L bit */ dev->d_ipv6addr[4] ^= HTONS(0x0200); #else dev->d_ipv6addr[4] = 0; dev->d_ipv6addr[5] = HTONS(0x00ff); dev->d_ipv6addr[6] = HTONS(0xfe00); dev->d_ipv6addr[7] = HTONS((uint16_t)nvaddr[1] << 8 | (uint16_t)nvaddr[0]); #endif wlinfo("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]); #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR wlinfo(" Node: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", dev->d_mac.radio.nv_addr[0], dev->d_mac.radio.nv_addr[1], dev->d_mac.radio.nv_addr[2], dev->d_mac.radio.nv_addr[3], dev->d_mac.radio.nv_addr[4], dev->d_mac.radio.nv_addr[5], dev->d_mac.radio.nv_addr[6], dev->d_mac.radio.nv_addr[7]); #else wlinfo(" Node: %02x:%02x\n", dev->d_mac.radio.nv_addr[0], dev->d_mac.radio.nv_addr[1]); #endif /* Set and activate a timer process */ (void)wd_start(priv->md_txpoll, TXPOLL_WDDELAY, macnet_txpoll_expiry, 1, (wdparm_t)priv); ret = OK; } /* The interface is now up */ priv->md_bifup = true; return ret; } /**************************************************************************** * Name: macnet_ifdown * * Description: * NuttX Callback: Stop the interface. * * Input 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. * * Input 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; wlinfo("ifup=%u\n", priv->md_bifup); /* 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) { #ifdef CONFIG_NET_6LOWPAN /* Make sure the our single packet buffer is attached */ priv->md_dev.r_dev.d_buf = priv->md_iobuffer.rb_buf; #endif /* Then poll the network for new XMIT data */ (void)devif_poll(&priv->md_dev.r_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. * * Input 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; wlinfo("Available=%u\n", work_available(&priv->md_pollwork)); /* 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 * * Input Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be added * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_MCASTGROUP 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 * * Input Parameters: * dev - Reference to the NuttX driver state structure * mac - The MAC address to be removed * * Returned Value: * None * * Assumptions: * ****************************************************************************/ #ifdef CONFIG_NET_MCASTGROUP 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. * * Input 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; ret = nxsem_wait(&priv->md_exclsem); if (ret < 0) { wlerr("ERROR: nxsem_wait failed: %d\n", ret); return ret; } /* 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); switch (cmd) { /* Command: MAC802154IOC_NOTIFY_REGISTER * Description: Register to receive a signal whenever there is a * event primitive sent from the MAC layer. * Argument: A read-only pointer to an instance of struct * macnet_notify_s * Return: Zero (OK) on success. Minus one will be returned on * failure with the errno value set appropriately. */ case MAC802154IOC_NOTIFY_REGISTER: { /* Save the notification events */ priv->md_notify_event = netmac->u.event; priv->md_notify_pid = getpid(); priv->md_notify_registered = true; ret = OK; } break; case MAC802154IOC_GET_EVENT: { FAR struct ieee802154_primitive_s *primitive; while (1) { /* Try popping an event off the queue */ primitive = (FAR struct ieee802154_primitive_s *) sq_remfirst(&priv->primitive_queue); /* If there was an event to pop off, copy it into the user * data and free it from the MAC layer's memory. */ if (primitive != NULL) { memcpy(&netmac->u, primitive, sizeof(struct ieee802154_primitive_s)); /* Free the event */ ieee802154_primitive_free(primitive); ret = OK; break; } /* There can only be one getevent pending at a time */ if (priv->md_eventpending) { ret = -EAGAIN; break; } priv->md_eventpending = true; nxsem_post(&priv->md_exclsem); /* Wait to be signaled when an event is queued */ ret = nxsem_wait(&priv->md_eventsem); if (ret < 0) { DEBUGASSERT(ret == -EINTR || ret == -ECANCELED); priv->md_eventpending = false; return ret; } /* Get exclusive access again, then loop back around and try and * pop an event off the queue */ ret = nxsem_wait(&priv->md_exclsem); if (ret < 0) { wlerr("ERROR: nxsem_wait failed: %d\n", ret); return ret; } } } break; case MAC802154IOC_ENABLE_EVENTS: { priv->md_enableevents = netmac->u.enable; ret = OK; } break; default: { ret = mac802154_ioctl(priv->md_mac, cmd, macarg); } break; } } } /* 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); } nxsem_post(&priv->md_exclsem); return ret; } #endif /**************************************************************************** * Name: macnet_get_mhrlen * * Description: * Calculate the MAC header length given the frame meta-data. * * Input Parameters: * netdev - The network device that will mediate the MAC interface * meta - Obfuscated metadata structure needed to create the radio * MAC header * * Returned Value: * A non-negative MAC header length is returned on success; a negated * errno value is returned on any failure. * ****************************************************************************/ static int macnet_get_mhrlen(FAR struct radio_driver_s *netdev, FAR const void *meta) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)netdev; FAR const struct ieee802154_frame_meta_s *pktmeta = (FAR const struct ieee802154_frame_meta_s *)meta; DEBUGASSERT(priv != NULL && priv->md_mac != NULL && pktmeta != NULL); return mac802154_get_mhrlen(priv->md_mac, pktmeta); } /**************************************************************************** * Name: macnet_req_data * * Description: * Requests the transfer of a list of frames to the MAC. * * Input Parameters: * netdev - The network device that will mediate the MAC interface * meta - Obfuscated metadata structure needed to create the radio * 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 radio_driver_s *netdev, FAR const void *meta, FAR struct iob_s *framelist) { FAR struct macnet_driver_s *priv = (FAR struct macnet_driver_s *)netdev; FAR const struct ieee802154_frame_meta_s *pktmeta = (FAR const struct ieee802154_frame_meta_s *)meta; FAR struct iob_s *iob; int ret; wlinfo("Received framelist\n"); DEBUGASSERT(priv != NULL && pktmeta != 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.r_dev); /* Remove the IOB from the queue */ framelist = iob->io_flink; iob->io_flink = NULL; /* Transfer the frame to the MAC. mac802154_req_data will return * -EINTR if a signal is received during certain phases of processing. * In this context we just need to ignore -EINTR errors and try again. */ do { ret = mac802154_req_data(priv->md_mac, pktmeta, iob); } while (ret == -EINTR); 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); } NETDEV_TXERRORS(&priv->md_dev.r_dev); return ret; } NETDEV_TXDONE(&priv->md_dev.r_dev); } return OK; } /**************************************************************************** * Name: macnet_properties * * Description: * Different packet radios may have different properties. If there are * multiple packet radios, then those properties have to be queried at * run time. This information is provided to the 6LoWPAN network via the * following structure. * * Input Parameters: * netdev - The network device to be queried * properties - Location where radio properties will be returned. * * Returned Value: * Zero (OK) returned on success; a negated errno value is returned on * any failure. * ****************************************************************************/ static int macnet_properties(FAR struct radio_driver_s *netdev, FAR struct radiodev_properties_s *properties) { DEBUGASSERT(netdev != NULL && properties != NULL); memset(properties, 0, sizeof(struct radiodev_properties_s)); /* General */ properties->sp_addrlen = MACNET_ADDRSIZE; /* Length of an address */ properties->sp_framelen = MACNET_FRAMELEN; /* Fixed frame length */ /* Multicast address (uses broadcast address) * * For meshes (only) a multicast address candetermined by the first 3 bits * of a short address (RFC 4944): * * 0xxxxxxx xxxxxxxx: Unicast address * 100xxxxx xxxxxxxx: Multicast address * 101xxxxx xxxxxxxx: Reserved * 110xxxxx xxxxxxxx: Reserved * 111xxxxx xxxxxxxx: Reserved * * Otherwise, Multicast is implemented with the broadcast address * (qualified by the destination PANID). */ properties->sp_mcast.nv_addrlen = IEEE802154_SADDRSIZE; memset(properties->sp_mcast.nv_addr, 0xff, RADIO_MAX_ADDRLEN); /* Broadcast address */ properties->sp_bcast.nv_addrlen = IEEE802154_SADDRSIZE; memset(properties->sp_mcast.nv_addr, 0xff, RADIO_MAX_ADDRLEN); #ifdef CONFIG_NET_STARPOINT /* Star hub node address. * * If this node is a "point" in a star topology, then the hub node * MAC address is the address of the hub/PAN coordinator. */ #ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR (void)macnet_coord_eaddr(netdev, properties->sp_hubnode.nv_addr); properties->sp_hubnode.nv_addrlen = IEEE802154_EADDRSIZE; #else (void)macnet_coord_saddr(netdev, properties->sp_hubnode.nv_addr); properties->sp_hubnode.nv_addrlen = IEEE802154_SADDRSIZE; #endif #endif 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 Value: * 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 radio_driver_s *radio; FAR struct net_driver_s *dev; FAR struct mac802154_maccb_s *maccb; 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; } /* Initialize the driver structure */ radio = &priv->md_dev; dev = &radio->r_dev; 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_MCASTGROUP 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 transmissions */ priv->md_mac = mac; /* Save the MAC interface instance */ priv->md_txpoll = wd_create(); /* Create periodic poll timer */ /* Setup a locking semaphore for exclusive device driver access */ nxsem_init(&priv->md_exclsem, 0, 1); DEBUGASSERT(priv->md_txpoll != NULL); /* Set the network mask. */ macnet_netmask(dev); /* Initialize the Network frame-related callbacks */ radio->r_get_mhrlen = macnet_get_mhrlen; /* Get MAC header length */ radio->r_req_data = macnet_req_data; /* Enqueue frame for transmission */ radio->r_properties = macnet_properties; /* Return radio properties */ /* Initialize fields related to MAC event handling */ priv->md_eventpending = false; nxsem_init(&priv->md_eventsem, 0, 0); nxsem_setprotocol(&priv->md_eventsem, SEM_PRIO_NONE); sq_init(&priv->primitive_queue); priv->md_enableevents = false; priv->md_notify_registered = false; /* Initialize the MAC callbacks */ priv->md_cb.mc_priv = priv; maccb = &priv->md_cb.mc_cb; maccb->flink = NULL; maccb->prio = CONFIG_IEEE802154_NETDEV_RECVRPRIO; maccb->notify = macnet_notify; /* Bind the callback structure */ ret = mac802154_bind(mac, maccb); if (ret < 0) { nerr("ERROR: Failed to bind the MAC callbacks: %d\n", ret); goto errout; } ret = macnet_update_nvaddr(&priv->md_dev.r_dev); if (ret < 0) { nerr("ERROR: Failed updating nvaddr: %d\n", ret); goto errout; } #ifdef CONFIG_NET_6LOWPAN /* Make sure the our single packet buffer is attached. We must do this before * registering the device since, once the device is registered, a packet may * be attempted to be forwarded and require the buffer. */ priv->md_dev.r_dev.d_buf = priv->md_iobuffer.rb_buf; #endif /* Register the device with the OS so that socket IOCTLs can be performed */ (void)netdev_register(&priv->md_dev.r_dev, NET_LL_IEEE802154); /* Put the network in the DOWN state, let the user decide when to bring it up */ dev->d_flags = IFF_DOWN; return macnet_ifdown(&priv->md_dev.r_dev); errout: /* Release wdog timers */ wd_delete(priv->md_txpoll); /* Free memory and return the error */ kmm_free(priv); return ret; } #endif /* CONFIG_NET && CONFIG_NET_skeleton */