1472 lines
44 KiB
C
1472 lines
44 KiB
C
/****************************************************************************
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* wireless/ieee802154/mac802154_netdev.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <time.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include <arpa/inet.h>
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#include <nuttx/arch.h>
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#include <nuttx/irq.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/signal.h>
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#include <nuttx/wdog.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/arp.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/radiodev.h>
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#include <nuttx/net/ieee802154.h>
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#include <nuttx/net/sixlowpan.h>
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#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
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#include "mac802154.h"
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#if defined(CONFIG_NET_6LOWPAN) || defined(CONFIG_NET_IEEE802154)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* If processing is not done at the interrupt level, then work queue support
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* is required.
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*/
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#if !defined(CONFIG_SCHED_WORKQUEUE)
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# error Work queue support is required in this configuration (CONFIG_SCHED_WORKQUEUE)
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#else
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/* Use the selected work queue */
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# if defined(CONFIG_IEEE802154_NETDEV_HPWORK)
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# define WPANWORK HPWORK
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# elif defined(CONFIG_IEEE802154_NETDEV_LPWORK)
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# define WPANWORK LPWORK
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# else
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# error Neither CONFIG_IEEE802154_NETDEV_HPWORK nor CONFIG_IEEE802154_NETDEV_LPWORK defined
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# endif
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#endif
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/* CONFIG_IEEE802154_NETDEV_NINTERFACES determines the number of physical interfaces
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* that will be supported.
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*/
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#ifndef CONFIG_IEEE802154_NETDEV_NINTERFACES
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# define CONFIG_IEEE802154_NETDEV_NINTERFACES 1
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#endif
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/* Preferred address size */
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#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
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# define MACNET_ADDRSIZE IEEE802154_EADDRSIZE
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#else
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# define MACNET_ADDRSIZE IEEE802154_SADDRSIZE
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#endif
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/* Frame size */
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#if defined(CONFIG_NET_IEEE802154_FRAMELEN)
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# define MACNET_FRAMELEN CONFIG_NET_IEEE802154_FRAMELEN
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#else
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# define MACNET_FRAMELEN IEEE802154_MAX_PHY_PACKET_SIZE
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#endif
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/* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per second */
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#define TXPOLL_WDDELAY (1*CLK_TCK)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This is our private version of the MAC callback structure */
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struct macnet_callback_s
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{
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/* This holds the information visible to the MAC layer */
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struct mac802154_maccb_s mc_cb; /* Interface understood by the MAC layer */
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FAR struct macnet_driver_s *mc_priv; /* Our priv data */
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};
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/* The macnet_driver_s encapsulates all state information for a single
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* IEEE802.15.4 MAC interface.
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*/
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struct macnet_driver_s
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{
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/* This holds the information visible to the NuttX network */
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struct radio_driver_s md_dev; /* Interface understood by the network */
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/* Cast compatible with struct macnet_driver_s */
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/* For internal use by this driver */
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sem_t md_exclsem; /* Exclusive access to struct */
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struct macnet_callback_s md_cb; /* Callback information */
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MACHANDLE md_mac; /* Contained MAC interface */
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bool md_bifup; /* true:ifup false:ifdown */
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WDOG_ID md_txpoll; /* TX poll timer */
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struct work_s md_pollwork; /* Defer poll work to the work queue */
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/* Hold a list of events */
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bool md_enableevents : 1; /* Are events enabled? */
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bool md_eventpending : 1; /* Is there a get event using the semaphore? */
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sem_t md_eventsem; /* Signaling semaphore for waiting get event */
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sq_queue_t primitive_queue; /* For holding primitives to pass along */
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#ifndef CONFIG_DISABLE_SIGNALS
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/* MAC Service notification information */
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bool md_notify_registered;
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uint8_t md_notify_signo;
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pid_t md_notify_pid;
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#endif
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Utility functions ********************************************************/
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static int macnet_advertise(FAR struct net_driver_s *dev);
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static inline void macnet_netmask(FAR struct net_driver_s *dev);
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/* IEE802.15.4 MAC callback functions ***************************************/
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static int macnet_notify(FAR struct mac802154_maccb_s *maccb,
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FAR struct ieee802154_primitive_s *primitive);
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static int macnet_rxframe(FAR struct macnet_driver_s *maccb,
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FAR struct ieee802154_data_ind_s *ind);
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/* Network interface support ************************************************/
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/* Common TX logic */
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static int macnet_txpoll_callback(FAR struct net_driver_s *dev);
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static void macnet_txpoll_work(FAR void *arg);
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static void macnet_txpoll_expiry(int argc, wdparm_t arg, ...);
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/* IOCTL support */
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#ifdef CONFIG_NET_STARPOINT
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#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
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static int macnet_coord_eaddr(FAR struct radio_driver_s *radio,
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FAR uint8_t *eaddr);
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#else
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static int macnet_coord_saddr(FAR struct radio_driver_s *radio,
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FAR uint8_t *saddr);
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#endif
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#endif
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/* NuttX callback functions */
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static int macnet_ifup(FAR struct net_driver_s *dev);
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static int macnet_ifdown(FAR struct net_driver_s *dev);
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static void macnet_txavail_work(FAR void *arg);
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static int macnet_txavail(FAR struct net_driver_s *dev);
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#ifdef CONFIG_NET_IGMP
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static int macnet_addmac(FAR struct net_driver_s *dev,
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FAR const uint8_t *mac);
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static int macnet_rmmac(FAR struct net_driver_s *dev,
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FAR const uint8_t *mac);
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#endif
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#ifdef CONFIG_NETDEV_IOCTL
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static int macnet_ioctl(FAR struct net_driver_s *dev, int cmd,
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unsigned long arg);
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#endif
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static int macnet_get_mhrlen(FAR struct radio_driver_s *netdev,
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FAR const void *meta);
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static int macnet_req_data(FAR struct radio_driver_s *netdev,
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FAR const void *meta, FAR struct iob_s *framelist);
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static int macnet_properties(FAR struct radio_driver_s *netdev,
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FAR struct radiodev_properties_s *properties);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_NET_6LOWPAN
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static struct sixlowpan_reassbuf_s g_iobuffer;
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: macnet_advertise
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*
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* Description:
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* Advertise the MAC and IPv6 address for this node.
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*
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* Creates a MAC-based IP address from the IEEE 802.15.14 short or extended
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* address assigned to the node.
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*
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* 128 112 96 80 64 48 32 16
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* ---- ---- ---- ---- ---- ---- ---- ----
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* fe80 0000 0000 0000 0000 00ff fe00 xxxx 2-byte short address IEEE 48-bit MAC
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* fe80 0000 0000 0000 xxxx xxxx xxxx xxxx 8-byte extended address IEEE EUI-64
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*
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****************************************************************************/
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static int macnet_advertise(FAR struct net_driver_s *dev)
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{
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FAR struct macnet_driver_s *priv;
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union ieee802154_macarg_u arg;
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int ret;
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#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
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uint8_t *eaddr;
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DEBUGASSERT(dev != NULL && dev->d_private != NULL);
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priv = (FAR struct macnet_driver_s *)dev->d_private;
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/* Get the eaddr from the MAC */
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arg.getreq.attr = IEEE802154_ATTR_MAC_EADDR;
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ret = mac802154_ioctl(priv->md_mac, MAC802154IOC_MLME_GET_REQUEST,
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(unsigned long)((uintptr_t)&arg));
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if (ret < 0)
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{
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wlerr("ERROR: MAC802154IOC_MLME_GET_REQUEST failed: %d\n", ret);
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return ret;
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}
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else
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{
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/* Set the MAC address as the eaddr */
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eaddr = arg.getreq.attrval.mac.eaddr;
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IEEE802154_EADDRCOPY(dev->d_mac.radio.nv_addr, eaddr);
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dev->d_mac.radio.nv_addrlen = IEEE802154_EADDRSIZE;
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#ifdef CONFIG_NET_IPv6
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/* Set the IP address based on the eaddr */
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dev->d_ipv6addr[0] = HTONS(0xfe80);
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dev->d_ipv6addr[1] = 0;
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dev->d_ipv6addr[2] = 0;
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dev->d_ipv6addr[3] = 0;
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dev->d_ipv6addr[4] = (uint16_t)eaddr[0] << 8 | (uint16_t)eaddr[1];
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dev->d_ipv6addr[5] = (uint16_t)eaddr[2] << 8 | (uint16_t)eaddr[3];
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dev->d_ipv6addr[6] = (uint16_t)eaddr[4] << 8 | (uint16_t)eaddr[5];
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dev->d_ipv6addr[7] = (uint16_t)eaddr[6] << 8 | (uint16_t)eaddr[7];
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dev->d_ipv6addr[4] ^= 0x200;
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#endif
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return OK;
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}
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#else
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uint8_t *saddr;
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DEBUGASSERT(dev != NULL && dev->d_private != NULL);
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priv = (FAR struct macnet_driver_s *)dev->d_private;
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/* Get the saddr from the MAC */
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arg.getreq.attr = IEEE802154_ATTR_MAC_SADDR;
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ret = mac802154_ioctl(priv->md_mac, MAC802154IOC_MLME_GET_REQUEST,
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(unsigned long)((uintptr_t)&arg));
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if (ret < 0)
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{
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wlerr("ERROR: MAC802154IOC_MLME_GET_REQUEST failed: %d\n", ret);
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return ret;
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}
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else
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{
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/* Set the MAC address as the saddr */
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saddr = arg.getreq.attrval.mac.saddr;
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IEEE802154_SADDRCOPY(dev->d_mac.radio.nv_addr, saddr);
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dev->d_mac.radio.nv_addrlen = IEEE802154_SADDRSIZE;
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#ifdef CONFIG_NET_IPv6
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/* Set the IP address based on the saddr */
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dev->d_ipv6addr[0] = HTONS(0xfe80);
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dev->d_ipv6addr[1] = 0;
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dev->d_ipv6addr[2] = 0;
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dev->d_ipv6addr[3] = 0;
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dev->d_ipv6addr[4] = 0;
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dev->d_ipv6addr[5] = HTONS(0x00ff);
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dev->d_ipv6addr[6] = HTONS(0xfe00);
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dev->d_ipv6addr[7] = (uint16_t)saddr[0] << 8 | (uint16_t)saddr[1];
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dev->d_ipv6addr[7] ^= 0x200;
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#endif
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return OK;
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}
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#endif
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}
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/****************************************************************************
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* Name: macnet_netmask
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*
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* Description:
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* Create a netmask of a MAC-based IP address which may be based on either
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* the IEEE 802.15.14 short or extended address of the MAC.
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*
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* 128 112 96 80 64 48 32 16
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* ---- ---- ---- ---- ---- ---- ---- ----
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* fe80 0000 0000 0000 0000 00ff fe00 xxxx 2-byte short address IEEE 48-bit MAC
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* fe80 0000 0000 0000 xxxx xxxx xxxx xxxx 8-byte extended address IEEE EUI-64
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*
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****************************************************************************/
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static inline void macnet_netmask(FAR struct net_driver_s *dev)
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{
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#ifdef CONFIG_NET_IPv6
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dev->d_ipv6netmask[0] = 0xffff;
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dev->d_ipv6netmask[1] = 0xffff;
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dev->d_ipv6netmask[2] = 0xffff;
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dev->d_ipv6netmask[3] = 0xffff;
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#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
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dev->d_ipv6netmask[4] = 0;
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dev->d_ipv6netmask[5] = 0;
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dev->d_ipv6netmask[6] = 0;
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dev->d_ipv6netmask[7] = 0;
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#else
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dev->d_ipv6netmask[4] = 0xffff;
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dev->d_ipv6netmask[5] = 0xffff;
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dev->d_ipv6netmask[6] = 0xffff;
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dev->d_ipv6netmask[7] = 0;
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#endif
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#endif
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}
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/****************************************************************************
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* Name: macnet_notify
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*
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* Description:
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*
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****************************************************************************/
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static int macnet_notify(FAR struct mac802154_maccb_s *maccb,
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FAR struct ieee802154_primitive_s *primitive)
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{
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FAR struct macnet_callback_s *cb =
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(FAR struct macnet_callback_s *)maccb;
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FAR struct macnet_driver_s *priv;
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DEBUGASSERT(cb != NULL && cb->mc_priv != NULL);
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priv = cb->mc_priv;
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/* Handle the special case for data indications or "incoming frames" */
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if (primitive->type == IEEE802154_PRIMITIVE_IND_DATA)
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{
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return macnet_rxframe(priv, &primitive->u.dataind);
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}
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/* If there is a registered notification receiver, queue the event and signal
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* the receiver. Events should be popped from the queue from the application
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* at a reasonable rate in order for the MAC layer to be able to allocate new
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* notifications.
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*/
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if (priv->md_enableevents)
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{
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/* Get exclusive access to the driver structure. We don't care about any
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* signals so if we see one, just go back to trying to get access again
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*/
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while (nxsem_wait(&priv->md_exclsem) < 0);
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sq_addlast((FAR sq_entry_t *)primitive, &priv->primitive_queue);
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/* Check if there is a read waiting for data */
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if (priv->md_eventpending)
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{
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/* Wake the thread waiting for the data transmission */
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priv->md_eventpending = false;
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nxsem_post(&priv->md_eventsem);
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}
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#ifndef CONFIG_DISABLE_SIGNALS
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if (priv->md_notify_registered)
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{
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#ifdef CONFIG_CAN_PASS_STRUCTS
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union sigval value;
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value.sival_int = (int)primitive->type;
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(void)nxsig_queue(priv->md_notify_pid, priv->md_notify_signo,
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value);
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#else
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(void)nxsig_queue(priv->md_notify_pid, priv->md_notify_signo,
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(FAR void *)primitive->type);
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#endif
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}
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#endif
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nxsem_post(&priv->md_exclsem);
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return OK;
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}
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/* By returning a negative value, we let the MAC know that we don't want the
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* primitive and it will free it for us
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*/
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return -1;
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}
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|
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/****************************************************************************
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* Name: macnet_rxframe
|
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*
|
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* Description:
|
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* Handle received frames forward by the IEEE 802.15.4 MAC.
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*
|
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* Returned Value:
|
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* Zero (OK) is returned on success; a negated errno value is returned on
|
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* any failure. On success, the ind and its contained iob will be freed.
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* The ind will be intact if this function returns a failure.
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*
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****************************************************************************/
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static int macnet_rxframe(FAR struct macnet_driver_s *priv,
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FAR struct ieee802154_data_ind_s *ind)
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{
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FAR struct iob_s *iob;
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int ret;
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|
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/* Ignore the frame if the network is not up */
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if (!priv->md_bifup)
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{
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wlwarn("WARNING: Dropped... Network is down\n");
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return -ENETDOWN;
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}
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|
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/* Peek the IOB contained the frame in the struct ieee802154_data_ind_s */
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|
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DEBUGASSERT(priv != NULL && ind != NULL && ind->frame != NULL);
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iob = ind->frame;
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/* Remove the IOB containing the frame. */
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ind->frame = NULL;
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|
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net_lock();
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|
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/* Transfer the frame to the network logic */
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|
|
#ifdef CONFIG_NET_IEEE802154
|
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/* Invoke the PF_IEEE802154 tap first. If the frame matches
|
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* with a connected PF_IEEE802145 socket, it will take the
|
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* frame and return success.
|
|
*/
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|
|
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 = g_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 = g_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:
|
|
* NuttX Callback: Bring up the IEEE 802.15.4 interface when an IP address
|
|
* is provided
|
|
*
|
|
* 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;
|
|
|
|
/* Set the IP address based on the addressing assigned to the node */
|
|
|
|
ret = macnet_advertise(dev);
|
|
if (ret >= 0)
|
|
{
|
|
#ifdef CONFIG_NET_IPv6
|
|
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
|
|
#else
|
|
if (dev->d_mac.radio.nv_addrlen == 8)
|
|
{
|
|
ninfo("Bringing up: Node: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x PANID=%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],
|
|
priv->lo_panid[0], priv->lo_panid[1]);
|
|
}
|
|
else if (dev->d_mac.radio.nv_addrlen == 2)
|
|
{
|
|
ninfo("Bringing up: Node: %02x:%02x PANID=%02x:%02x\n",
|
|
dev->d_mac.radio.nv_addr[0], dev->d_mac.radio.nv_addr[1],
|
|
priv->lo_panid[0], priv->lo_panid[1]);
|
|
}
|
|
else
|
|
{
|
|
nerr("ERROR: No address assigned\n");
|
|
}
|
|
#endif
|
|
|
|
/* Set and activate a timer process */
|
|
|
|
(void)wd_start(priv->md_txpoll, TXPOLL_WDDELAY, macnet_txpoll_expiry,
|
|
1, (wdparm_t)priv);
|
|
|
|
/* The interface is now up */
|
|
|
|
priv->md_bifup = true;
|
|
ret = OK;
|
|
}
|
|
|
|
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 = g_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_IGMP
|
|
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_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.
|
|
*
|
|
* 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)
|
|
{
|
|
#ifndef CONFIG_DISABLE_SIGNALS
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/* Command: MAC802154IOC_NOTIFY_REGISTER
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* Description: Register to receive a signal whenever there is a
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* event primitive sent from the MAC layer.
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* Argument: A read-only pointer to an instance of struct
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* macnet_notify_s
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* Return: Zero (OK) on success. Minus one will be returned on
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* failure with the errno value set appropriately.
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*/
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case MAC802154IOC_NOTIFY_REGISTER:
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{
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/* Save the notification events */
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priv->md_notify_signo = netmac->u.signo;
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priv->md_notify_pid = getpid();
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priv->md_notify_registered = true;
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ret = OK;
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}
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break;
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#endif
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case MAC802154IOC_GET_EVENT:
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{
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FAR struct ieee802154_primitive_s *primitive;
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while (1)
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{
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/* Try popping an event off the queue */
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primitive = (FAR struct ieee802154_primitive_s *)
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sq_remfirst(&priv->primitive_queue);
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/* If there was an event to pop off, copy it into the user
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* data and free it from the MAC layer's memory.
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*/
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if (primitive != NULL)
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{
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memcpy(&netmac->u, primitive,
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sizeof(struct ieee802154_primitive_s));
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/* Free the event */
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ieee802154_primitive_free(primitive);
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ret = OK;
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break;
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}
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/* There can only be one getevent pending at a time */
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if (priv->md_eventpending)
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{
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ret = -EAGAIN;
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break;
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}
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priv->md_eventpending = true;
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nxsem_post(&priv->md_exclsem);
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/* Wait to be signaled when an event is queued */
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ret = nxsem_wait(&priv->md_eventsem);
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if (ret < 0)
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{
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DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
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priv->md_eventpending = false;
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return ret;
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}
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/* Get exclusive access again, then loop back around and try and
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* pop an event off the queue
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*/
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ret = nxsem_wait(&priv->md_exclsem);
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if (ret < 0)
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{
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wlerr("ERROR: nxsem_wait failed: %d\n", ret);
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return ret;
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}
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}
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}
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break;
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case MAC802154IOC_ENABLE_EVENTS:
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{
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priv->md_enableevents = netmac->u.enable;
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ret = OK;
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}
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break;
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default:
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{
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ret = mac802154_ioctl(priv->md_mac, cmd, macarg);
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}
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break;
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}
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}
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}
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/* Okay, we have no idea what this command is.. just give to the
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* IEEE802.15.4 MAC layer without modification.
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*/
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else
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{
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ret = mac802154_ioctl(priv->md_mac, cmd, arg);
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}
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nxsem_post(&priv->md_exclsem);
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return ret;
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}
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#endif
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/****************************************************************************
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* Name: macnet_get_mhrlen
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*
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* Description:
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* Calculate the MAC header length given the frame meta-data.
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*
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* Input Parameters:
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* netdev - The network device that will mediate the MAC interface
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* meta - Obfuscated metadata structure needed to create the radio
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* MAC header
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*
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* Returned Value:
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* A non-negative MAC header length is returned on success; a negated
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* errno value is returned on any failure.
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*
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****************************************************************************/
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static int macnet_get_mhrlen(FAR struct radio_driver_s *netdev,
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FAR const void *meta)
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{
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FAR struct macnet_driver_s *priv =
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(FAR struct macnet_driver_s *)netdev;
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FAR const struct ieee802154_frame_meta_s *pktmeta =
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(FAR const struct ieee802154_frame_meta_s *)meta;
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DEBUGASSERT(priv != NULL && priv->md_mac != NULL && pktmeta != NULL);
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return mac802154_get_mhrlen(priv->md_mac, pktmeta);
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}
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/****************************************************************************
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* Name: macnet_req_data
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*
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* Description:
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* Requests the transfer of a list of frames to the MAC.
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*
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* Input Parameters:
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* netdev - The network device that will mediate the MAC interface
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* meta - Obfuscated metadata structure needed to create the radio
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* MAC header
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* framelist - Head of a list of frames to be transferred.
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*
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* Returned Value:
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* Zero (OK) returned on success; a negated errno value is returned on
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* any failure.
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*
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****************************************************************************/
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static int macnet_req_data(FAR struct radio_driver_s *netdev,
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FAR const void *meta, FAR struct iob_s *framelist)
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{
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FAR struct macnet_driver_s *priv =
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(FAR struct macnet_driver_s *)netdev;
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FAR const struct ieee802154_frame_meta_s *pktmeta =
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(FAR const struct ieee802154_frame_meta_s *)meta;
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FAR struct iob_s *iob;
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int ret;
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wlinfo("Received framelist\n");
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DEBUGASSERT(priv != NULL && pktmeta != NULL && framelist != NULL);
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/* Add the incoming list of frames to the MAC's outgoing queue */
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for (iob = framelist; iob != NULL; iob = framelist)
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{
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/* Increment statistics */
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NETDEV_TXPACKETS(&priv->md_dev.r_dev);
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/* Remove the IOB from the queue */
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framelist = iob->io_flink;
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iob->io_flink = NULL;
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/* Transfer the frame to the MAC. mac802154_req_data will return
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* -EINTR if a signal is received during certain phases of processing.
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* In this context we just need to ignore -EINTR errors and try again.
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*/
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do
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{
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ret = mac802154_req_data(priv->md_mac, pktmeta, iob);
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}
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while (ret == -EINTR);
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if (ret < 0)
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{
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wlerr("ERROR: mac802154_req_data failed: %d\n", ret);
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iob_free(iob);
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for (iob = framelist; iob != NULL; iob = framelist)
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{
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/* Remove the IOB from the queue and free */
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framelist = iob->io_flink;
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iob_free(iob);
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}
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NETDEV_TXERRORS(&priv->md_dev.r_dev);
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return ret;
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}
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NETDEV_TXDONE(&priv->md_dev.r_dev);
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}
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return OK;
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}
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/****************************************************************************
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* Name: macnet_properties
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*
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* Description:
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* Different packet radios may have different properties. If there are
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* multiple packet radios, then those properties have to be queried at
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* run time. This information is provided to the 6LoWPAN network via the
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* following structure.
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*
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* Input Parameters:
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* netdev - The network device to be queried
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* properties - Location where radio properties will be returned.
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*
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* Returned Value:
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* Zero (OK) returned on success; a negated errno value is returned on
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* any failure.
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*
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****************************************************************************/
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static int macnet_properties(FAR struct radio_driver_s *netdev,
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FAR struct radiodev_properties_s *properties)
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{
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DEBUGASSERT(netdev != NULL && properties != NULL);
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memset(properties, 0, sizeof(struct radiodev_properties_s));
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/* General */
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properties->sp_addrlen = MACNET_ADDRSIZE; /* Length of an address */
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properties->sp_framelen = MACNET_FRAMELEN; /* Fixed frame length */
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/* Multicast address (uses broadcast address)
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*
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* For meshes (only) a multicast address candetermined by the first 3 bits
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* of a short address (RFC 4944):
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*
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* 0xxxxxxx xxxxxxxx: Unicast address
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* 100xxxxx xxxxxxxx: Multicast address
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* 101xxxxx xxxxxxxx: Reserved
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* 110xxxxx xxxxxxxx: Reserved
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* 111xxxxx xxxxxxxx: Reserved
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*
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* Otherwise, Multicast is implemented with the broadcast address
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* (qualified by the destination PANID).
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*/
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properties->sp_mcast.nv_addrlen = IEEE802154_SADDRSIZE;
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memset(properties->sp_mcast.nv_addr, 0xff, RADIO_MAX_ADDRLEN);
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/* Broadcast address */
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properties->sp_bcast.nv_addrlen = IEEE802154_SADDRSIZE;
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memset(properties->sp_mcast.nv_addr, 0xff, RADIO_MAX_ADDRLEN);
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#ifdef CONFIG_NET_STARPOINT
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/* Star hub node address.
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*
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* If this node is a "point" in a star topology, then the hub node
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* MAC address is the address of the hub/PAN coordinator.
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*/
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#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
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(void)macnet_coord_eaddr(netdev, properties->sp_hubnode.nv_addr);
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properties->sp_hubnode.nv_addrlen = IEEE802154_EADDRSIZE;
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#else
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(void)macnet_coord_saddr(netdev, properties->sp_hubnode.nv_addr);
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properties->sp_hubnode.nv_addrlen = IEEE802154_SADDRSIZE;
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#endif
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#endif
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return OK;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mac802154netdev_register
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*
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* Description:
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* Register a network driver to access the IEEE 802.15.4 MAC layer from
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* a socket using 6LoWPAN
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*
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* Input Parameters:
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* mac - Pointer to the mac layer struct to be registered.
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise a negated errno value is
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* returned to indicate the nature of the failure.
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*
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****************************************************************************/
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int mac802154netdev_register(MACHANDLE mac)
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{
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FAR struct macnet_driver_s *priv;
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FAR struct radio_driver_s *radio;
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FAR struct net_driver_s *dev;
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FAR struct mac802154_maccb_s *maccb;
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int ret;
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DEBUGASSERT(mac != NULL);
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/* Get the interface structure associated with this interface number. */
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priv = (FAR struct macnet_driver_s *)
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kmm_zalloc(sizeof(struct macnet_driver_s));
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if (priv == NULL)
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{
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nerr("ERROR: Failed to allocate the device structure\n");
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return -ENOMEM;
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}
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/* Initialize the driver structure */
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radio = &priv->md_dev;
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dev = &radio->r_dev;
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dev->d_ifup = macnet_ifup; /* I/F up (new IP address) callback */
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dev->d_ifdown = macnet_ifdown; /* I/F down callback */
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dev->d_txavail = macnet_txavail; /* New TX data callback */
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#ifdef CONFIG_NET_IGMP
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dev->d_addmac = macnet_addmac; /* Add multicast MAC address */
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dev->d_rmmac = macnet_rmmac; /* Remove multicast MAC address */
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#endif
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#ifdef CONFIG_NETDEV_IOCTL
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dev->d_ioctl = macnet_ioctl; /* Handle network IOCTL commands */
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#endif
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dev->d_private = (FAR void *)priv; /* Used to recover private state from dev */
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/* Create a watchdog for timing polling for and timing of transmissions */
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priv->md_mac = mac; /* Save the MAC interface instance */
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priv->md_txpoll = wd_create(); /* Create periodic poll timer */
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/* Setup a locking semaphore for exclusive device driver access */
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nxsem_init(&priv->md_exclsem, 0, 1);
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DEBUGASSERT(priv->md_txpoll != NULL);
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/* Set the network mask. */
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macnet_netmask(dev);
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/* Initialize the Network frame-related callbacks */
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radio->r_get_mhrlen = macnet_get_mhrlen; /* Get MAC header length */
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radio->r_req_data = macnet_req_data; /* Enqueue frame for transmission */
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radio->r_properties = macnet_properties; /* Return radio properties */
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/* Initialize fields related to MAC event handling */
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priv->md_eventpending = false;
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nxsem_init(&priv->md_eventsem, 0, 0);
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nxsem_setprotocol(&priv->md_eventsem, SEM_PRIO_NONE);
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sq_init(&priv->primitive_queue);
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priv->md_enableevents = false;
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priv->md_notify_registered = false;
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/* Initialize the MAC callbacks */
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priv->md_cb.mc_priv = priv;
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maccb = &priv->md_cb.mc_cb;
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maccb->flink = NULL;
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maccb->prio = CONFIG_IEEE802154_NETDEV_RECVRPRIO;
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maccb->notify = macnet_notify;
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/* Bind the callback structure */
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ret = mac802154_bind(mac, maccb);
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if (ret < 0)
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{
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nerr("ERROR: Failed to bind the MAC callbacks: %d\n", ret);
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/* Release wdog timers */
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wd_delete(priv->md_txpoll);
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/* Free memory and return the error */
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kmm_free(priv);
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return ret;
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}
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/* Put the interface in the down state. */
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macnet_ifdown(dev);
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/* Register the device with the OS so that socket IOCTLs can be performed */
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(void)netdev_register(&priv->md_dev.r_dev, NET_LL_IEEE802154);
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return OK;
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}
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#endif /* CONFIG_NET && CONFIG_NET_skeleton */
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