diff options
Diffstat (limited to 'net/mac802154')
| -rw-r--r-- | net/mac802154/Makefile | 2 | ||||
| -rw-r--r-- | net/mac802154/ieee802154_dev.c | 4 | ||||
| -rw-r--r-- | net/mac802154/mac802154.h | 8 | ||||
| -rw-r--r-- | net/mac802154/mac_cmd.c | 29 | ||||
| -rw-r--r-- | net/mac802154/mib.c | 92 | ||||
| -rw-r--r-- | net/mac802154/rx.c | 1 | ||||
| -rw-r--r-- | net/mac802154/tx.c | 2 | ||||
| -rw-r--r-- | net/mac802154/wpan.c | 559 |
8 files changed, 696 insertions, 1 deletions
diff --git a/net/mac802154/Makefile b/net/mac802154/Makefile index ec1bd3f..57cf5d1 100644 --- a/net/mac802154/Makefile +++ b/net/mac802154/Makefile @@ -1,2 +1,2 @@ obj-$(CONFIG_MAC802154) += mac802154.o -mac802154-objs := ieee802154_dev.o rx.o tx.o mac_cmd.o mib.o monitor.o +mac802154-objs := ieee802154_dev.o rx.o tx.o mac_cmd.o mib.o monitor.o wpan.o diff --git a/net/mac802154/ieee802154_dev.c b/net/mac802154/ieee802154_dev.c index e3edfb0..e748aed 100644 --- a/net/mac802154/ieee802154_dev.c +++ b/net/mac802154/ieee802154_dev.c @@ -140,6 +140,10 @@ mac802154_add_iface(struct wpan_phy *phy, const char *name, int type) dev = alloc_netdev(sizeof(struct mac802154_sub_if_data), name, mac802154_monitor_setup); break; + case IEEE802154_DEV_WPAN: + dev = alloc_netdev(sizeof(struct mac802154_sub_if_data), + name, mac802154_wpan_setup); + break; default: dev = NULL; err = -EINVAL; diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h index 789d9c9..6967864 100644 --- a/net/mac802154/mac802154.h +++ b/net/mac802154/mac802154.h @@ -93,6 +93,7 @@ struct mac802154_sub_if_data { #define MAC802154_CHAN_NONE (~(u8)0) /* No channel is assigned */ extern struct ieee802154_reduced_mlme_ops mac802154_mlme_reduced; +extern struct ieee802154_mlme_ops mac802154_mlme_wpan; int mac802154_slave_open(struct net_device *dev); int mac802154_slave_close(struct net_device *dev); @@ -100,10 +101,17 @@ int mac802154_slave_close(struct net_device *dev); void mac802154_monitors_rx(struct mac802154_priv *priv, struct sk_buff *skb); void mac802154_monitor_setup(struct net_device *dev); +void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb); +void mac802154_wpan_setup(struct net_device *dev); + netdev_tx_t mac802154_tx(struct mac802154_priv *priv, struct sk_buff *skb, u8 page, u8 chan); /* MIB callbacks */ +void mac802154_dev_set_short_addr(struct net_device *dev, u16 val); void mac802154_dev_set_ieee_addr(struct net_device *dev); +u16 mac802154_dev_get_pan_id(const struct net_device *dev); +void mac802154_dev_set_pan_id(struct net_device *dev, u16 val); +void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan); #endif /* MAC802154_H */ diff --git a/net/mac802154/mac_cmd.c b/net/mac802154/mac_cmd.c index 7a5d0e0..7f5403e 100644 --- a/net/mac802154/mac_cmd.c +++ b/net/mac802154/mac_cmd.c @@ -25,12 +25,36 @@ #include <linux/skbuff.h> #include <linux/if_arp.h> +#include <net/ieee802154.h> #include <net/ieee802154_netdev.h> #include <net/wpan-phy.h> #include <net/mac802154.h> +#include <net/nl802154.h> #include "mac802154.h" +static int mac802154_mlme_start_req(struct net_device *dev, + struct ieee802154_addr *addr, + u8 channel, u8 page, + u8 bcn_ord, u8 sf_ord, + u8 pan_coord, u8 blx, + u8 coord_realign) +{ + BUG_ON(addr->addr_type != IEEE802154_ADDR_SHORT); + + mac802154_dev_set_pan_id(dev, addr->pan_id); + mac802154_dev_set_short_addr(dev, addr->short_addr); + mac802154_dev_set_ieee_addr(dev); + mac802154_dev_set_page_channel(dev, page, channel); + + /* FIXME: add validation for unused parameters to be sane + * for SoftMAC + */ + ieee802154_nl_start_confirm(dev, IEEE802154_SUCCESS); + + return 0; +} + struct wpan_phy *mac802154_get_phy(const struct net_device *dev) { struct mac802154_sub_if_data *priv = netdev_priv(dev); @@ -43,3 +67,8 @@ struct wpan_phy *mac802154_get_phy(const struct net_device *dev) struct ieee802154_reduced_mlme_ops mac802154_mlme_reduced = { .get_phy = mac802154_get_phy, }; + +struct ieee802154_mlme_ops mac802154_mlme_wpan = { + .get_phy = mac802154_get_phy, + .start_req = mac802154_mlme_start_req, +}; diff --git a/net/mac802154/mib.c b/net/mac802154/mib.c index ab59821..380829d 100644 --- a/net/mac802154/mib.c +++ b/net/mac802154/mib.c @@ -28,6 +28,11 @@ #include "mac802154.h" +struct phy_chan_notify_work { + struct work_struct work; + struct net_device *dev; +}; + struct hw_addr_filt_notify_work { struct work_struct work; struct net_device *dev; @@ -78,6 +83,23 @@ static void set_hw_addr_filt(struct net_device *dev, unsigned long changed) return; } +void mac802154_dev_set_short_addr(struct net_device *dev, u16 val) +{ + struct mac802154_sub_if_data *priv = netdev_priv(dev); + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + spin_lock_bh(&priv->mib_lock); + priv->short_addr = val; + spin_unlock_bh(&priv->mib_lock); + + if ((priv->hw->ops->set_hw_addr_filt) && + (priv->hw->hw.hw_filt.short_addr != priv->short_addr)) { + priv->hw->hw.hw_filt.short_addr = priv->short_addr; + set_hw_addr_filt(dev, IEEE802515_AFILT_SADDR_CHANGED); + } +} + void mac802154_dev_set_ieee_addr(struct net_device *dev) { struct mac802154_sub_if_data *priv = netdev_priv(dev); @@ -91,3 +113,73 @@ void mac802154_dev_set_ieee_addr(struct net_device *dev) set_hw_addr_filt(dev, IEEE802515_AFILT_IEEEADDR_CHANGED); } } + +u16 mac802154_dev_get_pan_id(const struct net_device *dev) +{ + struct mac802154_sub_if_data *priv = netdev_priv(dev); + u16 ret; + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + spin_lock_bh(&priv->mib_lock); + ret = priv->pan_id; + spin_unlock_bh(&priv->mib_lock); + + return ret; +} + +void mac802154_dev_set_pan_id(struct net_device *dev, u16 val) +{ + struct mac802154_sub_if_data *priv = netdev_priv(dev); + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + spin_lock_bh(&priv->mib_lock); + priv->pan_id = val; + spin_unlock_bh(&priv->mib_lock); + + if ((priv->hw->ops->set_hw_addr_filt) && + (priv->hw->hw.hw_filt.pan_id != priv->pan_id)) { + priv->hw->hw.hw_filt.pan_id = priv->pan_id; + set_hw_addr_filt(dev, IEEE802515_AFILT_PANID_CHANGED); + } +} + +static void phy_chan_notify(struct work_struct *work) +{ + struct phy_chan_notify_work *nw = container_of(work, + struct phy_chan_notify_work, work); + struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev); + struct mac802154_sub_if_data *priv = netdev_priv(nw->dev); + int res; + + res = hw->ops->set_channel(&hw->hw, priv->page, priv->chan); + if (res) + pr_debug("set_channel failed\n"); + + kfree(nw); +} + +void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan) +{ + struct mac802154_sub_if_data *priv = netdev_priv(dev); + struct phy_chan_notify_work *work; + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + spin_lock_bh(&priv->mib_lock); + priv->page = page; + priv->chan = chan; + spin_unlock_bh(&priv->mib_lock); + + if (priv->hw->phy->current_channel != priv->chan || + priv->hw->phy->current_page != priv->page) { + work = kzalloc(sizeof(*work), GFP_ATOMIC); + if (!work) + return; + + INIT_WORK(&work->work, phy_chan_notify); + work->dev = dev; + queue_work(priv->hw->dev_workqueue, &work->work); + } +} diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c index 4a7d76d..38548ec 100644 --- a/net/mac802154/rx.c +++ b/net/mac802154/rx.c @@ -77,6 +77,7 @@ mac802154_subif_rx(struct ieee802154_dev *hw, struct sk_buff *skb, u8 lqi) } mac802154_monitors_rx(priv, skb); + mac802154_wpans_rx(priv, skb); out: dev_kfree_skb(skb); return; diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index 434b687..1a4df39 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -88,6 +88,8 @@ netdev_tx_t mac802154_tx(struct mac802154_priv *priv, struct sk_buff *skb, return NETDEV_TX_OK; } + mac802154_monitors_rx(mac802154_to_priv(&priv->hw), skb); + if (!(priv->hw.flags & IEEE802154_HW_OMIT_CKSUM)) { u16 crc = crc_ccitt(0, skb->data, skb->len); u8 *data = skb_put(skb, 2); diff --git a/net/mac802154/wpan.c b/net/mac802154/wpan.c new file mode 100644 index 0000000..f30f6d4 --- /dev/null +++ b/net/mac802154/wpan.c @@ -0,0 +1,559 @@ +/* + * Copyright 2007-2012 Siemens AG + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Written by: + * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> + * Sergey Lapin <slapin@ossfans.org> + * Maxim Gorbachyov <maxim.gorbachev@siemens.com> + * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> + */ + +#include <linux/netdevice.h> +#include <linux/module.h> +#include <linux/if_arp.h> + +#include <net/rtnetlink.h> +#include <linux/nl802154.h> +#include <net/af_ieee802154.h> +#include <net/mac802154.h> +#include <net/ieee802154_netdev.h> +#include <net/ieee802154.h> +#include <net/wpan-phy.h> + +#include "mac802154.h" + +static inline int mac802154_fetch_skb_u8(struct sk_buff *skb, u8 *val) +{ + if (unlikely(!pskb_may_pull(skb, 1))) + return -EINVAL; + + *val = skb->data[0]; + skb_pull(skb, 1); + + return 0; +} + +static inline int mac802154_fetch_skb_u16(struct sk_buff *skb, u16 *val) +{ + if (unlikely(!pskb_may_pull(skb, 2))) + return -EINVAL; + + *val = skb->data[0] | (skb->data[1] << 8); + skb_pull(skb, 2); + + return 0; +} + +static inline void mac802154_haddr_copy_swap(u8 *dest, const u8 *src) +{ + int i; + for (i = 0; i < IEEE802154_ADDR_LEN; i++) + dest[IEEE802154_ADDR_LEN - i - 1] = src[i]; +} + +static int +mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct mac802154_sub_if_data *priv = netdev_priv(dev); + struct sockaddr_ieee802154 *sa = + (struct sockaddr_ieee802154 *)&ifr->ifr_addr; + int err = -ENOIOCTLCMD; + + spin_lock_bh(&priv->mib_lock); + + switch (cmd) { + case SIOCGIFADDR: + if (priv->pan_id == IEEE802154_PANID_BROADCAST || + priv->short_addr == IEEE802154_ADDR_BROADCAST) { + err = -EADDRNOTAVAIL; + break; + } + + sa->family = AF_IEEE802154; + sa->addr.addr_type = IEEE802154_ADDR_SHORT; + sa->addr.pan_id = priv->pan_id; + sa->addr.short_addr = priv->short_addr; + + err = 0; + break; + case SIOCSIFADDR: + dev_warn(&dev->dev, + "Using DEBUGing ioctl SIOCSIFADDR isn't recommened!\n"); + if (sa->family != AF_IEEE802154 || + sa->addr.addr_type != IEEE802154_ADDR_SHORT || + sa->addr.pan_id == IEEE802154_PANID_BROADCAST || + sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || + sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { + err = -EINVAL; + break; + } + + priv->pan_id = sa->addr.pan_id; + priv->short_addr = sa->addr.short_addr; + + err = 0; + break; + } + + spin_unlock_bh(&priv->mib_lock); + return err; +} + +static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) +{ + struct sockaddr *addr = p; + + if (netif_running(dev)) + return -EBUSY; + + /* FIXME: validate addr */ + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + mac802154_dev_set_ieee_addr(dev); + return 0; +} + +static int mac802154_header_create(struct sk_buff *skb, + struct net_device *dev, + unsigned short type, + const void *_daddr, + const void *_saddr, + unsigned len) +{ + const struct ieee802154_addr *saddr = _saddr; + const struct ieee802154_addr *daddr = _daddr; + struct ieee802154_addr dev_addr; + struct mac802154_sub_if_data *priv = netdev_priv(dev); + int pos = 2; + u8 *head; + u16 fc; + + if (!daddr) + return -EINVAL; + + head = kzalloc(MAC802154_FRAME_HARD_HEADER_LEN, GFP_KERNEL); + if (head == NULL) + return -ENOMEM; + + head[pos++] = mac_cb(skb)->seq; /* DSN/BSN */ + fc = mac_cb_type(skb); + + if (!saddr) { + spin_lock_bh(&priv->mib_lock); + + if (priv->short_addr == IEEE802154_ADDR_BROADCAST || + priv->short_addr == IEEE802154_ADDR_UNDEF || + priv->pan_id == IEEE802154_PANID_BROADCAST) { + dev_addr.addr_type = IEEE802154_ADDR_LONG; + memcpy(dev_addr.hwaddr, dev->dev_addr, + IEEE802154_ADDR_LEN); + } else { + dev_addr.addr_type = IEEE802154_ADDR_SHORT; + dev_addr.short_addr = priv->short_addr; + } + + dev_addr.pan_id = priv->pan_id; + saddr = &dev_addr; + + spin_unlock_bh(&priv->mib_lock); + } + + if (daddr->addr_type != IEEE802154_ADDR_NONE) { + fc |= (daddr->addr_type << IEEE802154_FC_DAMODE_SHIFT); + + head[pos++] = daddr->pan_id & 0xff; + head[pos++] = daddr->pan_id >> 8; + + if (daddr->addr_type == IEEE802154_ADDR_SHORT) { + head[pos++] = daddr->short_addr & 0xff; + head[pos++] = daddr->short_addr >> 8; + } else { + mac802154_haddr_copy_swap(head + pos, daddr->hwaddr); + pos += IEEE802154_ADDR_LEN; + } + } + + if (saddr->addr_type != IEEE802154_ADDR_NONE) { + fc |= (saddr->addr_type << IEEE802154_FC_SAMODE_SHIFT); + + if ((saddr->pan_id == daddr->pan_id) && + (saddr->pan_id != IEEE802154_PANID_BROADCAST)) { + /* PANID compression/intra PAN */ + fc |= IEEE802154_FC_INTRA_PAN; + } else { + head[pos++] = saddr->pan_id & 0xff; + head[pos++] = saddr->pan_id >> 8; + } + + if (saddr->addr_type == IEEE802154_ADDR_SHORT) { + head[pos++] = saddr->short_addr & 0xff; + head[pos++] = saddr->short_addr >> 8; + } else { + mac802154_haddr_copy_swap(head + pos, saddr->hwaddr); + pos += IEEE802154_ADDR_LEN; + } + } + + head[0] = fc; + head[1] = fc >> 8; + + memcpy(skb_push(skb, pos), head, pos); + kfree(head); + + return pos; +} + +static int +mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) +{ + const u8 *hdr = skb_mac_header(skb); + const u8 *tail = skb_tail_pointer(skb); + struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr; + u16 fc; + int da_type; + + if (hdr + 3 > tail) + goto malformed; + + fc = hdr[0] | (hdr[1] << 8); + + hdr += 3; + + da_type = IEEE802154_FC_DAMODE(fc); + addr->addr_type = IEEE802154_FC_SAMODE(fc); + + switch (da_type) { + case IEEE802154_ADDR_NONE: + if (fc & IEEE802154_FC_INTRA_PAN) + goto malformed; + break; + case IEEE802154_ADDR_LONG: + if (fc & IEEE802154_FC_INTRA_PAN) { + if (hdr + 2 > tail) + goto malformed; + addr->pan_id = hdr[0] | (hdr[1] << 8); + hdr += 2; + } + + if (hdr + IEEE802154_ADDR_LEN > tail) + goto malformed; + + hdr += IEEE802154_ADDR_LEN; + break; + case IEEE802154_ADDR_SHORT: + if (fc & IEEE802154_FC_INTRA_PAN) { + if (hdr + 2 > tail) + goto malformed; + addr->pan_id = hdr[0] | (hdr[1] << 8); + hdr += 2; + } + + if (hdr + 2 > tail) + goto malformed; + + hdr += 2; + break; + default: + goto malformed; + + } + + switch (addr->addr_type) { + case IEEE802154_ADDR_NONE: + break; + case IEEE802154_ADDR_LONG: + if (!(fc & IEEE802154_FC_INTRA_PAN)) { + if (hdr + 2 > tail) + goto malformed; + addr->pan_id = hdr[0] | (hdr[1] << 8); + hdr += 2; + } + + if (hdr + IEEE802154_ADDR_LEN > tail) + goto malformed; + + mac802154_haddr_copy_swap(addr->hwaddr, hdr); + hdr += IEEE802154_ADDR_LEN; + break; + case IEEE802154_ADDR_SHORT: + if (!(fc & IEEE802154_FC_INTRA_PAN)) { + if (hdr + 2 > tail) + goto malformed; + addr->pan_id = hdr[0] | (hdr[1] << 8); + hdr += 2; + } + + if (hdr + 2 > tail) + goto malformed; + + addr->short_addr = hdr[0] | (hdr[1] << 8); + hdr += 2; + break; + default: + goto malformed; + } + + return sizeof(struct ieee802154_addr); + +malformed: + pr_debug("malformed packet\n"); + return 0; +} + +static netdev_tx_t +mac802154_wpan_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct mac802154_sub_if_data *priv; + u8 chan, page; + + priv = netdev_priv(dev); + + spin_lock_bh(&priv->mib_lock); + chan = priv->chan; + page = priv->page; + spin_unlock_bh(&priv->mib_lock); + + if (chan == MAC802154_CHAN_NONE || + page >= WPAN_NUM_PAGES || + chan >= WPAN_NUM_CHANNELS) + return NETDEV_TX_OK; + + skb->skb_iif = dev->ifindex; + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + + return mac802154_tx(priv->hw, skb, page, chan); +} + +static struct header_ops mac802154_header_ops = { + .create = mac802154_header_create, + .parse = mac802154_header_parse, +}; + +static const struct net_device_ops mac802154_wpan_ops = { + .ndo_open = mac802154_slave_open, + .ndo_stop = mac802154_slave_close, + .ndo_start_xmit = mac802154_wpan_xmit, + .ndo_do_ioctl = mac802154_wpan_ioctl, + .ndo_set_mac_address = mac802154_wpan_mac_addr, +}; + +void mac802154_wpan_setup(struct net_device *dev) +{ + struct mac802154_sub_if_data *priv; + + dev->addr_len = IEEE802154_ADDR_LEN; + memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); + + dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; + dev->header_ops = &mac802154_header_ops; + dev->needed_tailroom = 2; /* FCS */ + dev->mtu = IEEE802154_MTU; + dev->tx_queue_len = 10; + dev->type = ARPHRD_IEEE802154; + dev->flags = IFF_NOARP | IFF_BROADCAST; + dev->watchdog_timeo = 0; + + dev->destructor = free_netdev; + dev->netdev_ops = &mac802154_wpan_ops; + dev->ml_priv = &mac802154_mlme_wpan; + + priv = netdev_priv(dev); + priv->type = IEEE802154_DEV_WPAN; + + priv->chan = MAC802154_CHAN_NONE; + priv->page = 0; + + spin_lock_init(&priv->mib_lock); + + get_random_bytes(&priv->bsn, 1); + get_random_bytes(&priv->dsn, 1); + + priv->pan_id = IEEE802154_PANID_BROADCAST; + priv->short_addr = IEEE802154_ADDR_BROADCAST; +} + +static int mac802154_process_data(struct net_device *dev, struct sk_buff *skb) +{ + return netif_rx(skb); +} + +static int +mac802154_subif_frame(struct mac802154_sub_if_data *sdata, struct sk_buff *skb) +{ + pr_debug("getting packet via slave interface %s\n", sdata->dev->name); + + spin_lock_bh(&sdata->mib_lock); + + switch (mac_cb(skb)->da.addr_type) { + case IEEE802154_ADDR_NONE: + if (mac_cb(skb)->sa.addr_type != IEEE802154_ADDR_NONE) + /* FIXME: check if we are PAN coordinator */ + skb->pkt_type = PACKET_OTHERHOST; + else + /* ACK comes with both addresses empty */ + skb->pkt_type = PACKET_HOST; + break; + case IEEE802154_ADDR_LONG: + if (mac_cb(skb)->da.pan_id != sdata->pan_id && + mac_cb(skb)->da.pan_id != IEEE802154_PANID_BROADCAST) + skb->pkt_type = PACKET_OTHERHOST; + else if (!memcmp(mac_cb(skb)->da.hwaddr, sdata->dev->dev_addr, + IEEE802154_ADDR_LEN)) + skb->pkt_type = PACKET_HOST; + else + skb->pkt_type = PACKET_OTHERHOST; + break; + case IEEE802154_ADDR_SHORT: + if (mac_cb(skb)->da.pan_id != sdata->pan_id && + mac_cb(skb)->da.pan_id != IEEE802154_PANID_BROADCAST) + skb->pkt_type = PACKET_OTHERHOST; + else if (mac_cb(skb)->da.short_addr == sdata->short_addr) + skb->pkt_type = PACKET_HOST; + else if (mac_cb(skb)->da.short_addr == + IEEE802154_ADDR_BROADCAST) + skb->pkt_type = PACKET_BROADCAST; + else + skb->pkt_type = PACKET_OTHERHOST; + break; + default: + break; + } + + spin_unlock_bh(&sdata->mib_lock); + + skb->dev = sdata->dev; + + sdata->dev->stats.rx_packets++; + sdata->dev->stats.rx_bytes += skb->len; + + switch (mac_cb_type(skb)) { + case IEEE802154_FC_TYPE_DATA: + return mac802154_process_data(sdata->dev, skb); + default: + pr_warning("ieee802154: bad frame received (type = %d)\n", + mac_cb_type(skb)); + kfree_skb(skb); + return NET_RX_DROP; + } +} + +static int mac802154_parse_frame_start(struct sk_buff *skb) +{ + u8 *head = skb->data; + u16 fc; + + if (mac802154_fetch_skb_u16(skb, &fc) || + mac802154_fetch_skb_u8(skb, &(mac_cb(skb)->seq))) + goto err; + + pr_debug("fc: %04x dsn: %02x\n", fc, head[2]); + + mac_cb(skb)->flags = IEEE802154_FC_TYPE(fc); + mac_cb(skb)->sa.addr_type = IEEE802154_FC_SAMODE(fc); + mac_cb(skb)->da.addr_type = IEEE802154_FC_DAMODE(fc); + + if (fc & IEEE802154_FC_INTRA_PAN) + mac_cb(skb)->flags |= MAC_CB_FLAG_INTRAPAN; + + if (mac_cb(skb)->da.addr_type != IEEE802154_ADDR_NONE) { + if (mac802154_fetch_skb_u16(skb, &(mac_cb(skb)->da.pan_id))) + goto err; + + /* source PAN id compression */ + if (mac_cb_is_intrapan(skb)) + mac_cb(skb)->sa.pan_id = mac_cb(skb)->da.pan_id; + + pr_debug("dest PAN addr: %04x\n", mac_cb(skb)->da.pan_id); + + if (mac_cb(skb)->da.addr_type == IEEE802154_ADDR_SHORT) { + u16 *da = &(mac_cb(skb)->da.short_addr); + + if (mac802154_fetch_skb_u16(skb, da)) + goto err; + + pr_debug("destination address is short: %04x\n", + mac_cb(skb)->da.short_addr); + } else { + if (!pskb_may_pull(skb, IEEE802154_ADDR_LEN)) + goto err; + + mac802154_haddr_copy_swap(mac_cb(skb)->da.hwaddr, + skb->data); + skb_pull(skb, IEEE802154_ADDR_LEN); + + pr_debug("destination address is hardware\n"); + } + } + + if (mac_cb(skb)->sa.addr_type != IEEE802154_ADDR_NONE) { + /* non PAN-compression, fetch source address id */ + if (!(mac_cb_is_intrapan(skb))) { + u16 *sa_pan = &(mac_cb(skb)->sa.pan_id); + + if (mac802154_fetch_skb_u16(skb, sa_pan)) + goto err; + } + + pr_debug("source PAN addr: %04x\n", mac_cb(skb)->da.pan_id); + + if (mac_cb(skb)->sa.addr_type == IEEE802154_ADDR_SHORT) { + u16 *sa = &(mac_cb(skb)->sa.short_addr); + + if (mac802154_fetch_skb_u16(skb, sa)) + goto err; + + pr_debug("source address is short: %04x\n", + mac_cb(skb)->sa.short_addr); + } else { + if (!pskb_may_pull(skb, IEEE802154_ADDR_LEN)) + goto err; + + mac802154_haddr_copy_swap(mac_cb(skb)->sa.hwaddr, + skb->data); + skb_pull(skb, IEEE802154_ADDR_LEN); + + pr_debug("source address is hardware\n"); + } + } + + return 0; +err: + return -EINVAL; +} + +void mac802154_wpans_rx(struct mac802154_priv *priv, struct sk_buff *skb) +{ + int ret; + struct sk_buff *sskb; + struct mac802154_sub_if_data *sdata; + + ret = mac802154_parse_frame_start(skb); + if (ret) { + pr_debug("got invalid frame\n"); + return; + } + + rcu_read_lock(); + list_for_each_entry_rcu(sdata, &priv->slaves, list) { + if (sdata->type != IEEE802154_DEV_WPAN) + continue; + + sskb = skb_clone(skb, GFP_ATOMIC); + if (sskb) + mac802154_subif_frame(sdata, sskb); + } + rcu_read_unlock(); +} |
