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nuttx/wireless/ieee802154/mac802154_netdev.c
Xiang Xiao 463f321316 wireless/ieee802154: Don't set IFF_DOWN in mac802154netdev_register 
since IFF_DOWN is only used for request, not for status. Instead,
IFF_UP should be used to query the netdev status. The IFF_DOWN
related macros are also removed to avoid the confuse.

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-07-19 11:09:16 +03:00

1348 lines
41 KiB
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/****************************************************************************
* wireless/ieee802154/mac802154_netdev.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>
#include <arpa/inet.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <nuttx/kmalloc.h>
#include <nuttx/signal.h>
#include <nuttx/wqueue.h>
#include <nuttx/mm/iob.h>
#include <nuttx/net/arp.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/radiodev.h>
#include <nuttx/net/ieee802154.h>
#include <nuttx/net/sixlowpan.h>
#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
#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
#if (CONFIG_MAC802154_NTXDESC < CONFIG_IOB_NBUFFERS)
# warning "CONFIG_MAC802154_NTXDESC should probably be equal to" \
"CONFIG_IOB_NBUFFERS to avoid waiting on req_data"
#endif
/****************************************************************************
* 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 */
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);
/* 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
/* 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
{
IEEE802154_EADDRCOPY(dev->d_mac.radio.nv_addr,
arg.getreq.attrval.mac.eaddr);
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_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[0] << 8 |
(uint16_t)nvaddr[1]);
dev->d_ipv6addr[5] = HTONS((uint16_t)nvaddr[2] << 8 |
(uint16_t)nvaddr[3]);
dev->d_ipv6addr[6] = HTONS((uint16_t)nvaddr[4] << 8 |
(uint16_t)nvaddr[5]);
dev->d_ipv6addr[7] = HTONS((uint16_t)nvaddr[6] << 8 |
(uint16_t)nvaddr[7]);
/* 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[0] << 8 |
(uint16_t)nvaddr[1]);
#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
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();
/* 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 */
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)
{
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. */
ret = mac802154_req_data(priv->md_mac, pktmeta, iob, false);
if (ret < 0)
{
wlerr("ERROR: mac802154_req_data failed: %d\n", ret);
iob_free(iob, IOBUSER_WIRELESS_MAC802154_NETDEV);
for (iob = framelist; iob != NULL; iob = framelist)
{
/* Remove the IOB from the queue and free */
framelist = iob->io_flink;
iob_free(iob, IOBUSER_WIRELESS_MAC802154_NETDEV);
}
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
macnet_coord_eaddr(netdev, properties->sp_hubnode.nv_addr);
properties->sp_hubnode.nv_addrlen = IEEE802154_EADDRSIZE;
#else
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 = priv; /* Used to recover private state from dev */
priv->md_mac = mac; /* Save the MAC interface instance */
/* Setup a locking semaphore for exclusive device driver access */
nxsem_init(&priv->md_exclsem, 0, 1);
/* 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_set_protocol(&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 */
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
*/
return macnet_ifdown(&priv->md_dev.r_dev);
errout:
/* Free memory and return the error */
kmm_free(priv);
return ret;
}
#endif /* CONFIG_NET && CONFIG_NET_skeleton */
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