Some of available devices are just dump radios implementing IEEE 802.15.4 PHY layer. This commit adds a common library that acts like an intermediate layer between our socket family and drivers for those dumb devices. Currently this is data-only part (no commands, no beacons). Control interfaces will follow up shortly. Note this implementaion is neither certified, nor feature complete! Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> Signed-off-by: Sergey Lapin <slapin@xxxxxxxxxxx> --- MAINTAINERS | 1 + include/linux/mac802154.h | 35 ++ include/net/mac802154.h | 106 ++++++ net/Kconfig | 1 + net/Makefile | 1 + net/mac802154/Kconfig | 17 + net/mac802154/Makefile | 4 + net/mac802154/dev.c | 924 +++++++++++++++++++++++++++++++++++++++++++++ net/mac802154/mac802154.h | 85 +++++ net/mac802154/mac_cmd.c | 99 +++++ net/mac802154/mdev.c | 295 +++++++++++++++ net/mac802154/mib.h | 32 ++ net/mac802154/rx.c | 98 +++++ 13 files changed, 1698 insertions(+), 0 deletions(-) create mode 100644 include/linux/mac802154.h create mode 100644 include/net/mac802154.h create mode 100644 net/mac802154/Kconfig create mode 100644 net/mac802154/Makefile create mode 100644 net/mac802154/dev.c create mode 100644 net/mac802154/mac802154.h create mode 100644 net/mac802154/mac_cmd.c create mode 100644 net/mac802154/mdev.c create mode 100644 net/mac802154/mib.h create mode 100644 net/mac802154/rx.c diff --git a/MAINTAINERS b/MAINTAINERS index d6befb2..5bdb64e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2529,6 +2529,7 @@ W: http://apps.sourceforge.net/trac/linux-zigbee T: git git://git.kernel.org/pub/scm/linux/kernel/git/lowpan/lowpan.git S: Maintained F: net/ieee802154/ +F: net/mac802154/ F: drivers/ieee802154/ INTEGRITY MEASUREMENT ARCHITECTURE (IMA) diff --git a/include/linux/mac802154.h b/include/linux/mac802154.h new file mode 100644 index 0000000..e95e38d --- /dev/null +++ b/include/linux/mac802154.h @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2007, 2008, 2009 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. + * + */ + +#ifndef LINUX_MAC802154_H +#define LINUX_MAC802154_H + +enum { + IFLA_WPAN_UNSPEC, + IFLA_WPAN_CHANNEL, + IFLA_WPAN_PAN_ID, + IFLA_WPAN_SHORT_ADDR, + IFLA_WPAN_COORD_SHORT_ADDR, + IFLA_WPAN_COORD_EXT_ADDR, + __IFLA_WPAN_MAX, +}; + +#define IFLA_WPAN_MAX (__IFLA_WPAN_MAX - 1) + +#endif + diff --git a/include/net/mac802154.h b/include/net/mac802154.h new file mode 100644 index 0000000..db76799 --- /dev/null +++ b/include/net/mac802154.h @@ -0,0 +1,106 @@ +/* + * IEEE802.15.4-2003 specification + * + * Copyright (C) 2007, 2008 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: + */ +#ifndef NET_MAC802154_H +#define NET_MAC802154_H + +struct ieee802154_dev { + int extra_tx_headroom; /* headroom to reserve for tx skb */ + void *priv; /* driver-specific data */ + u32 channel_mask; + u8 current_channel; + u32 flags; /* Flags for device to set */ + struct device *parent; +}; + +/* Checksum is in hardware and is omitted from packet */ +/** + * enum ieee802154_hw_flags - hardware flags + * + * These flags are used to indicate hardware capabilities to + * the stack. Generally, flags here should have their meaning + * done in a way that the simplest hardware doesn't need setting + * any particular flags. There are some exceptions to this rule, + * however, so you are advised to review these flags carefully. + * + * @IEEE802154_HW_OMIT_CKSUM: + * Indicates that receiver omits FCS and transmitter will add + * FCS on it's own. + * + * @IEEE802154_HW_AACK: + * Indicates that receiver will autorespond with ACK frames. + */ +enum ieee802154_hw_flags { + IEEE802154_HW_OMIT_CKSUM = 1 << 0, + IEEE802154_HW_AACK = 1 << 1, +}; + +struct sk_buff; + +/** + * struct ieee802154_ops - callbacks from mac802154 to the driver + * + * This structure contains various callbacks that the driver may + * handle or, in some cases, must handle, for example to transmit + * a frame. + * + * @start: Handler that 802.15.4 module calls for device initialisation. + * This function is called before the first interface is attached. + * + * @stop: Handler that 802.15.4 module calls for device cleanup + * This function is called after the last interface is removed. + * + * @tx: Handler that 802.15.4 module calls for each transmitted frame. + * skb cntains the buffer starting from the IEEE 802.15.4 header. + * The low-level driver should send the frame based on available + * configuration. + * This function should return zero or negative errno. + * + * @ed: Handler that 802.15.4 module calls for Energy Detection. + * This function should place the value for detected energy + * (usually device-dependant) in the level pointer and return + * either zero or negative errno. + * + * @set_channel: Set radio for listening on specific channel. + * Set the device for listening on specified channel. + * Returns either zero, or negative errno. + */ +struct ieee802154_ops { + struct module *owner; + int (*start)(struct ieee802154_dev *dev); + void (*stop)(struct ieee802154_dev *dev); + int (*xmit)(struct ieee802154_dev *dev, + struct sk_buff *skb); + int (*ed)(struct ieee802154_dev *dev, u8 *level); + int (*set_channel)(struct ieee802154_dev *dev, + int channel); +}; + +struct ieee802154_dev *ieee802154_alloc_device(size_t priv_size, + struct ieee802154_ops *ops); +int ieee802154_register_device(struct ieee802154_dev *dev); +void ieee802154_unregister_device(struct ieee802154_dev *dev); +void ieee802154_free_device(struct ieee802154_dev *dev); + +void ieee802154_rx(struct ieee802154_dev *dev, struct sk_buff *skb, u8 lqi); +void ieee802154_rx_irqsafe(struct ieee802154_dev *dev, struct sk_buff *skb, + u8 lqi); +#endif + diff --git a/net/Kconfig b/net/Kconfig index 7051b97..b42d325 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -180,6 +180,7 @@ source "net/econet/Kconfig" source "net/wanrouter/Kconfig" source "net/phonet/Kconfig" source "net/ieee802154/Kconfig" +source "net/mac802154/Kconfig" source "net/sched/Kconfig" source "net/dcb/Kconfig" diff --git a/net/Makefile b/net/Makefile index ba324ae..81115f6 100644 --- a/net/Makefile +++ b/net/Makefile @@ -61,6 +61,7 @@ ifneq ($(CONFIG_DCB),) obj-y += dcb/ endif obj-y += ieee802154/ +obj-y += mac802154/ ifeq ($(CONFIG_NET),y) obj-$(CONFIG_SYSCTL) += sysctl_net.o diff --git a/net/mac802154/Kconfig b/net/mac802154/Kconfig new file mode 100644 index 0000000..2dd7f99 --- /dev/null +++ b/net/mac802154/Kconfig @@ -0,0 +1,17 @@ +config MAC802154 + tristate "Generic IEEE 802.15.4 Soft Networking Stack (mac802154)" + depends on IEEE802154 && EXPERIMENTAL + select CRC_CCITT + ---help--- + This option enables the hardware independent IEEE 802.15.4 + networking stack for SoftMAC devices (the ones implementing + only PHY level of IEEE 802.15.4 standard). + + Note: this implementation is neither certified, nor feature + complete! We do not garantee that it is compatible w/ other + implementations, etc. + + If you plan to use HardMAC IEEE 802.15.4 devices, you can + say N here. Alternatievly you can say M to compile it as + module. + diff --git a/net/mac802154/Makefile b/net/mac802154/Makefile new file mode 100644 index 0000000..07b7821 --- /dev/null +++ b/net/mac802154/Makefile @@ -0,0 +1,4 @@ +obj-$(CONFIG_MAC802154) += mac802154.o +mac802154-objs := rx.o mdev.o dev.o mac_cmd.o + +EXTRA_CFLAGS += -Wall -DDEBUG diff --git a/net/mac802154/dev.c b/net/mac802154/dev.c new file mode 100644 index 0000000..b40f6fd --- /dev/null +++ b/net/mac802154/dev.c @@ -0,0 +1,924 @@ +/* + * Copyright 2007, 2008, 2009 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: + * Sergey Lapin <slapin@xxxxxxxxxxx> + * Maxim Gorbachyov <maxim.gorbachev@xxxxxxxxxxx> + */ + +#include <linux/net.h> +#include <linux/capability.h> +#include <linux/module.h> +#include <linux/if_arp.h> +#include <linux/rculist.h> +#include <linux/random.h> +#include <linux/crc-ccitt.h> +#include <linux/mac802154.h> +#include <net/rtnetlink.h> + +#include <net/af_ieee802154.h> +#include <net/mac802154.h> +#include <net/ieee802154_netdev.h> +#include <net/ieee802154.h> + +#include "mac802154.h" +#include "mib.h" + +static int ieee802154_net_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv; + priv = netdev_priv(dev); + + if (!(priv->hw->hw.flags & IEEE802154_HW_OMIT_CKSUM)) { + u16 crc = crc_ccitt(0, skb->data, skb->len); + u8 *data = skb_put(skb, 2); + data[0] = crc & 0xff; + data[1] = crc >> 8; + } + + read_lock(&priv->mib_lock); + phy_cb(skb)->chan = priv->chan; + read_unlock(&priv->mib_lock); + + skb->iif = dev->ifindex; + skb->dev = priv->hw->netdev; + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + + dev->trans_start = jiffies; + dev_queue_xmit(skb); + + return 0; +} + +static int ieee802154_slave_open(struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + int res = 0; + + if (priv->hw->open_count++ == 0) { + res = dev_open(priv->hw->netdev); + WARN_ON(res); + if (res) + goto err; + } + + netif_start_queue(dev); + return 0; +err: + priv->hw->open_count--; + + return res; +} + +static int ieee802154_slave_close(struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + + netif_stop_queue(dev); + + if ((--priv->hw->open_count) == 0) { + if (netif_running(priv->hw->netdev)) + dev_close(priv->hw->netdev); + } + + return 0; +} + + +static int ieee802154_slave_ioctl(struct net_device *dev, struct ifreq *ifr, + int cmd) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + struct sockaddr_ieee802154 *sa = + (struct sockaddr_ieee802154 *)&ifr->ifr_addr; + int err = -ENOIOCTLCMD; + + read_lock(&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; + } + read_unlock(&priv->mib_lock); + return err; +} + +static int ieee802154_slave_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); + return 0; +} + +static void ieee802154_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 ieee802154_header_create(struct sk_buff *skb, + struct net_device *dev, + unsigned short type, const void *_daddr, + const void *_saddr, unsigned len) +{ + u8 head[24] = {}; + int pos = 0; + + u16 fc; + const struct ieee802154_addr *saddr = _saddr; + const struct ieee802154_addr *daddr = _daddr; + struct ieee802154_addr dev_addr; + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + + fc = mac_cb_type(skb); + if (mac_cb_is_ackreq(skb)) + fc |= IEEE802154_FC_ACK_REQ; + + pos = 2; + + head[pos++] = mac_cb(skb)->seq; /* DSN/BSN */ + + if (!daddr) + return -EINVAL; + + if (!saddr) { + read_lock(&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; + + read_unlock(&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 { + ieee802154_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 { + ieee802154_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); + + return pos; +} + +static int ieee802154_header_parse(const struct sk_buff *skb, + unsigned char *haddr) +{ + const u8 *hdr = skb_mac_header(skb), *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 (hdr + 2 > tail) + goto malformed; + if (fc & IEEE802154_FC_INTRA_PAN) { + 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 (hdr + 2 > tail) + goto malformed; + if (fc & IEEE802154_FC_INTRA_PAN) { + 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 (hdr + 2 > tail) + goto malformed; + if (!(fc & IEEE802154_FC_INTRA_PAN)) { + addr->pan_id = hdr[0] | (hdr[1] << 8); + hdr += 2; + } + + if (hdr + IEEE802154_ADDR_LEN > tail) + goto malformed; + memcpy(addr->hwaddr, hdr, IEEE802154_ADDR_LEN); + hdr += IEEE802154_ADDR_LEN; + break; + + case IEEE802154_ADDR_SHORT: + if (hdr + 2 > tail) + goto malformed; + if (!(fc & IEEE802154_FC_INTRA_PAN)) { + 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 struct header_ops ieee802154_header_ops = { + .create = ieee802154_header_create, + .parse = ieee802154_header_parse, +}; + +static const struct net_device_ops ieee802154_slave_ops = { + .ndo_open = ieee802154_slave_open, + .ndo_stop = ieee802154_slave_close, + .ndo_start_xmit = ieee802154_net_xmit, + .ndo_do_ioctl = ieee802154_slave_ioctl, + .ndo_set_mac_address = ieee802154_slave_mac_addr, +}; + +static void ieee802154_netdev_setup(struct net_device *dev) +{ + dev->addr_len = IEEE802154_ADDR_LEN; + memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); + dev->features = NETIF_F_NO_CSUM; + dev->hard_header_len = 2 + 1 + 20 + 14; + dev->header_ops = &ieee802154_header_ops; + dev->needed_tailroom = 2; /* FCS */ + dev->mtu = 127; + 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 = &ieee802154_slave_ops; + dev->ml_priv = &mac802154_mlme; +} + +/* + * This is for hw unregistration only, as it doesn't do RCU locking + */ +void ieee802154_drop_slaves(struct ieee802154_dev *hw) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(hw); + struct ieee802154_sub_if_data *sdata, *next; + + ASSERT_RTNL(); + + list_for_each_entry_safe(sdata, next, &priv->slaves, list) { + mutex_lock(&sdata->hw->slaves_mtx); + list_del(&sdata->list); + mutex_unlock(&sdata->hw->slaves_mtx); + + dev_put(sdata->hw->netdev); + + unregister_netdevice(sdata->dev); + } +} + +static int ieee802154_netdev_validate(struct nlattr *tb[], + struct nlattr *data[]) +{ + if (tb[IFLA_ADDRESS]) + if (nla_len(tb[IFLA_ADDRESS]) != IEEE802154_ADDR_LEN) + return -EINVAL; + + if (tb[IFLA_BROADCAST]) + return -EINVAL; + + return 0; +} + +static int ieee802154_netdev_newlink(struct net_device *dev, + struct nlattr *tb[], + struct nlattr *data[]) +{ + struct net_device *mdev; + struct ieee802154_sub_if_data *priv; + struct ieee802154_priv *ipriv; + int err; + + if (!tb[IFLA_LINK]) + return -EOPNOTSUPP; + + mdev = __dev_get_by_index(dev_net(dev), nla_get_u32(tb[IFLA_LINK])); + if (!mdev) + return -ENODEV; + + if (mdev->type != ARPHRD_IEEE802154_PHY) + return -EINVAL; + + ipriv = netdev_priv(mdev); + + priv = netdev_priv(dev); + priv->dev = dev; + priv->hw = ipriv; + + rwlock_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; + + dev_hold(ipriv->netdev); + + dev->needed_headroom = ipriv->hw.extra_tx_headroom; + + SET_NETDEV_DEV(dev, &ipriv->netdev->dev); + + err = register_netdevice(dev); + if (err < 0) + return err; + + mutex_lock(&ipriv->slaves_mtx); + list_add_tail_rcu(&priv->list, &ipriv->slaves); + mutex_unlock(&ipriv->slaves_mtx); + + return 0; +} + +static void ieee802154_netdev_dellink(struct net_device *dev) +{ + struct ieee802154_sub_if_data *sdata; + ASSERT_RTNL(); + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + sdata = netdev_priv(dev); + + mutex_lock(&sdata->hw->slaves_mtx); + list_del_rcu(&sdata->list); + mutex_unlock(&sdata->hw->slaves_mtx); + + dev_put(sdata->hw->netdev); + + synchronize_rcu(); + unregister_netdevice(sdata->dev); +} + +static size_t ieee802154_netdev_get_size(const struct net_device *dev) +{ + return nla_total_size(2) + /* IFLA_WPAN_CHANNEL */ + nla_total_size(2) + /* IFLA_WPAN_PAN_ID */ + nla_total_size(2) + /* IFLA_WPAN_SHORT_ADDR */ + nla_total_size(2) + /* IFLA_WPAN_COORD_SHORT_ADDR */ + nla_total_size(8); /* IFLA_WPAN_COORD_EXT_ADDR */ +} + +static int ieee802154_netdev_fill_info(struct sk_buff *skb, + const struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + + read_lock(&priv->mib_lock); + + NLA_PUT_U16(skb, IFLA_WPAN_CHANNEL, priv->chan); + NLA_PUT_U16(skb, IFLA_WPAN_PAN_ID, priv->pan_id); + NLA_PUT_U16(skb, IFLA_WPAN_SHORT_ADDR, priv->short_addr); + /* TODO: IFLA_WPAN_COORD_SHORT_ADDR */ + /* TODO: IFLA_WPAN_COORD_EXT_ADDR */ + + read_unlock(&priv->mib_lock); + + return 0; + +nla_put_failure: + read_unlock(&priv->mib_lock); + return -EMSGSIZE; +} + +static struct rtnl_link_ops wpan_link_ops __read_mostly = { + .kind = "wpan", + .priv_size = sizeof(struct ieee802154_sub_if_data), + .setup = ieee802154_netdev_setup, + .validate = ieee802154_netdev_validate, + .newlink = ieee802154_netdev_newlink, + .dellink = ieee802154_netdev_dellink, + .get_size = ieee802154_netdev_get_size, + .fill_info = ieee802154_netdev_fill_info, +}; + +static int ieee802154_process_beacon(struct net_device *dev, + struct sk_buff *skb) +{ + pr_warning("ieee802154: beacon frames are not yet supported\n"); + kfree_skb(skb); + return NET_RX_DROP; +} + +static int ieee802154_process_ack(struct net_device *dev, struct sk_buff *skb) +{ + pr_debug("got ACK for SEQ=%d\n", mac_cb(skb)->seq); + + kfree_skb(skb); + return NET_RX_SUCCESS; +} + +static int ieee802154_process_data(struct net_device *dev, struct sk_buff *skb) +{ + return netif_rx(skb); +} + +static int ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, + struct sk_buff *skb) +{ + pr_debug("%s Getting packet via slave interface %s\n", + __func__, sdata->dev->name); + + read_lock(&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; + } + + read_unlock(&sdata->mib_lock); + + skb->dev = sdata->dev; + + if (skb->pkt_type == PACKET_HOST && mac_cb_is_ackreq(skb) && + !(sdata->hw->hw.flags & IEEE802154_HW_AACK)) + dev_warn(&sdata->dev->dev, + "ACK requested, however AACK not supported.\n"); + + switch (mac_cb_type(skb)) { + case IEEE802154_FC_TYPE_BEACON: + return ieee802154_process_beacon(sdata->dev, skb); + case IEEE802154_FC_TYPE_ACK: + return ieee802154_process_ack(sdata->dev, skb); + case IEEE802154_FC_TYPE_MAC_CMD: + return ieee802154_process_cmd(sdata->dev, skb); + case IEEE802154_FC_TYPE_DATA: + return ieee802154_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 u8 fetch_skb_u8(struct sk_buff *skb) +{ + u8 ret; + + BUG_ON(skb->len < 1); + + ret = skb->data[0]; + skb_pull(skb, 1); + + return ret; +} + +static u16 fetch_skb_u16(struct sk_buff *skb) +{ + u16 ret; + + BUG_ON(skb->len < 2); + + ret = skb->data[0] + (skb->data[1] * 256); + skb_pull(skb, 2); + return ret; +} + +static void fetch_skb_u64(struct sk_buff *skb, void *data) +{ + BUG_ON(skb->len < IEEE802154_ADDR_LEN); + + memcpy(data, skb->data, IEEE802154_ADDR_LEN); + skb_pull(skb, IEEE802154_ADDR_LEN); +} + +#define IEEE802154_FETCH_U8(skb, var) \ + do { \ + if (skb->len < 1) \ + goto exit_error; \ + var = fetch_skb_u8(skb); \ + } while (0) + +#define IEEE802154_FETCH_U16(skb, var) \ + do { \ + if (skb->len < 2) \ + goto exit_error; \ + var = fetch_skb_u16(skb); \ + } while (0) + +#define IEEE802154_FETCH_U64(skb, var) \ + do { \ + if (skb->len < IEEE802154_ADDR_LEN) \ + goto exit_error; \ + fetch_skb_u64(skb, &var); \ + } while (0) + +static int parse_frame_start(struct sk_buff *skb) +{ + u8 *head = skb->data; + u16 fc; + + if (skb->len < 3) { + pr_debug("frame size %d bytes is too short\n", skb->len); + return -EINVAL; + } + + IEEE802154_FETCH_U16(skb, fc); + IEEE802154_FETCH_U8(skb, mac_cb(skb)->seq); + + pr_debug("%s: %04x dsn%02x\n", __func__, fc, head[2]); + + mac_cb(skb)->flags = IEEE802154_FC_TYPE(fc); + + if (fc & IEEE802154_FC_ACK_REQ) { + pr_debug("%s(): ACKNOWLEDGE required\n", __func__); + mac_cb(skb)->flags |= MAC_CB_FLAG_ACKREQ; + } + + if (fc & IEEE802154_FC_SECEN) + mac_cb(skb)->flags |= MAC_CB_FLAG_SECEN; + + if (fc & IEEE802154_FC_INTRA_PAN) + mac_cb(skb)->flags |= MAC_CB_FLAG_INTRAPAN; + + /* TODO */ + if (mac_cb_is_secen(skb)) { + pr_info("security support is not implemented\n"); + return -EINVAL; + } + + mac_cb(skb)->sa.addr_type = IEEE802154_FC_SAMODE(fc); + if (mac_cb(skb)->sa.addr_type == IEEE802154_ADDR_NONE) + pr_debug("%s(): src addr_type is NONE\n", __func__); + + mac_cb(skb)->da.addr_type = IEEE802154_FC_DAMODE(fc); + if (mac_cb(skb)->da.addr_type == IEEE802154_ADDR_NONE) + pr_debug("%s(): dst addr_type is NONE\n", __func__); + + if (IEEE802154_FC_TYPE(fc) == IEEE802154_FC_TYPE_ACK) { + /* ACK can only have NONE-type addresses */ + if (mac_cb(skb)->sa.addr_type != IEEE802154_ADDR_NONE || + mac_cb(skb)->da.addr_type != IEEE802154_ADDR_NONE) + return -EINVAL; + } + + if (mac_cb(skb)->da.addr_type != IEEE802154_ADDR_NONE) { + IEEE802154_FETCH_U16(skb, mac_cb(skb)->da.pan_id); + + if (mac_cb_is_intrapan(skb)) { /* ! panid compress */ + pr_debug("%s(): src IEEE802154_FC_INTRA_PAN\n", + __func__); + mac_cb(skb)->sa.pan_id = mac_cb(skb)->da.pan_id; + pr_debug("%s(): src PAN address %04x\n", + __func__, mac_cb(skb)->sa.pan_id); + } + + pr_debug("%s(): dst PAN address %04x\n", + __func__, mac_cb(skb)->da.pan_id); + + if (mac_cb(skb)->da.addr_type == IEEE802154_ADDR_SHORT) { + IEEE802154_FETCH_U16(skb, mac_cb(skb)->da.short_addr); + pr_debug("%s(): dst SHORT address %04x\n", + __func__, mac_cb(skb)->da.short_addr); + + } else { + IEEE802154_FETCH_U64(skb, mac_cb(skb)->da.hwaddr); + pr_debug("%s(): dst hardware addr\n", __func__); + } + } + + if (mac_cb(skb)->sa.addr_type != IEEE802154_ADDR_NONE) { + pr_debug("%s(): got src non-NONE address\n", __func__); + if (!(mac_cb_is_intrapan(skb))) { /* ! panid compress */ + IEEE802154_FETCH_U16(skb, mac_cb(skb)->sa.pan_id); + pr_debug("%s(): src IEEE802154_FC_INTRA_PAN\n", + __func__); + } + + if (mac_cb(skb)->sa.addr_type == IEEE802154_ADDR_SHORT) { + IEEE802154_FETCH_U16(skb, mac_cb(skb)->sa.short_addr); + pr_debug("%s(): src IEEE802154_ADDR_SHORT\n", + __func__); + } else { + IEEE802154_FETCH_U64(skb, mac_cb(skb)->sa.hwaddr); + pr_debug("%s(): src hardware addr\n", __func__); + } + } + + return 0; + +exit_error: + return -EINVAL; +} + +void ieee802154_subif_rx(struct ieee802154_dev *hw, struct sk_buff *skb) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(hw); + struct ieee802154_sub_if_data *sdata, *prev = NULL; + int ret; + + BUILD_BUG_ON(sizeof(struct ieee802154_mac_cb) > sizeof(skb->cb)); + pr_debug("%s()\n", __func__); + + if (!(priv->hw.flags & IEEE802154_HW_OMIT_CKSUM)) { + u16 crc; + + if (skb->len < 2) { + pr_debug("%s(): Got invalid frame\n", __func__); + goto out; + } + crc = crc_ccitt(0, skb->data, skb->len); + if (crc) { + pr_debug("%s(): CRC mismatch\n", __func__); + goto out; + } + skb_trim(skb, skb->len - 2); /* CRC */ + } + + ret = parse_frame_start(skb); /* 3 bytes pulled after this */ + if (ret) { + pr_debug("%s(): Got invalid frame\n", __func__); + goto out; + } + + pr_debug("%s() frame %d\n", __func__, mac_cb_type(skb)); + + rcu_read_lock(); + list_for_each_entry_rcu(sdata, &priv->slaves, list) + { + if (prev) { + struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); + if (skb2) + ieee802154_subif_frame(prev, skb2); + } + + prev = sdata; + } + + if (prev) { + ieee802154_subif_frame(prev, skb); + skb = NULL; + } + + rcu_read_unlock(); + +out: + dev_kfree_skb(skb); + return; +} + +u16 ieee802154_dev_get_pan_id(struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + u16 ret; + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + read_lock(&priv->mib_lock); + ret = priv->pan_id; + read_unlock(&priv->mib_lock); + + return ret; +} + +u16 ieee802154_dev_get_short_addr(struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + u16 ret; + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + read_lock(&priv->mib_lock); + ret = priv->short_addr; + read_unlock(&priv->mib_lock); + + return ret; +} + +void ieee802154_dev_set_pan_id(struct net_device *dev, u16 val) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + write_lock(&priv->mib_lock); + priv->pan_id = val; + write_unlock(&priv->mib_lock); +} +void ieee802154_dev_set_short_addr(struct net_device *dev, u16 val) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + write_lock(&priv->mib_lock); + priv->short_addr = val; + write_unlock(&priv->mib_lock); +} +void ieee802154_dev_set_channel(struct net_device *dev, u8 val) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + write_lock(&priv->mib_lock); + priv->chan = val; + write_unlock(&priv->mib_lock); +} + +u8 ieee802154_dev_get_dsn(struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + u16 ret; + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + write_lock(&priv->mib_lock); + ret = priv->dsn++; + write_unlock(&priv->mib_lock); + + return ret; +} + +u8 ieee802154_dev_get_bsn(struct net_device *dev) +{ + struct ieee802154_sub_if_data *priv = netdev_priv(dev); + u16 ret; + + BUG_ON(dev->type != ARPHRD_IEEE802154); + + write_lock(&priv->mib_lock); + ret = priv->bsn++; + write_unlock(&priv->mib_lock); + + return ret; +} + +static int __init ieee802154_dev_init(void) +{ + return rtnl_link_register(&wpan_link_ops); +} +module_init(ieee802154_dev_init); + +static void __exit ieee802154_dev_exit(void) +{ + rtnl_link_unregister(&wpan_link_ops); +} +module_exit(ieee802154_dev_exit); + +MODULE_ALIAS_RTNL_LINK("wpan"); + diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h new file mode 100644 index 0000000..f4e8d29 --- /dev/null +++ b/net/mac802154/mac802154.h @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2007, 2008 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: + * Pavel Smolenskiy <pavel.smolenskiy@xxxxxxxxx> + * Maxim Gorbachyov <maxim.gorbachev@xxxxxxxxxxx> + * Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> + */ +#ifndef MAC802154_H +#define MAC802154_H + +#include <linux/spinlock.h> +struct ieee802154_priv { + struct ieee802154_dev hw; + struct ieee802154_ops *ops; + + struct net_device *netdev; /* mwpanX device */ + int open_count; + /* As in mac80211 slaves list is modified: + * 1) under the RTNL + * 2) protected by slaves_mtx; + * 3) in an RCU manner + * + * So atomic readers can use any of this protection methods + */ + struct list_head slaves; + struct mutex slaves_mtx; + /* This one is used for scanning and other + * jobs not to be interfered with serial driver */ + struct workqueue_struct *dev_workqueue; +}; + +#define ieee802154_to_priv(_hw) container_of(_hw, struct ieee802154_priv, hw) + +struct ieee802154_sub_if_data { + struct list_head list; /* the ieee802154_priv->slaves list */ + + struct ieee802154_priv *hw; + struct net_device *dev; + + rwlock_t mib_lock; + + u16 pan_id; + u16 short_addr; + + u8 chan; + + /* MAC BSN field */ + u8 bsn; + /* MAC BSN field */ + u8 dsn; +}; + +void ieee802154_drop_slaves(struct ieee802154_dev *hw); + +void ieee802154_subif_rx(struct ieee802154_dev *hw, struct sk_buff *skb); + +struct ieee802154_phy_cb { + u8 lqi; + u8 chan; +}; + +static inline struct ieee802154_phy_cb *phy_cb(struct sk_buff *skb) +{ + return (struct ieee802154_phy_cb *)skb->cb; +} + +extern struct ieee802154_mlme_ops mac802154_mlme; + +int ieee802154_process_cmd(struct net_device *dev, struct sk_buff *skb); + +#endif diff --git a/net/mac802154/mac_cmd.c b/net/mac802154/mac_cmd.c new file mode 100644 index 0000000..8941628 --- /dev/null +++ b/net/mac802154/mac_cmd.c @@ -0,0 +1,99 @@ +/* + * MAC commands interface + * + * Copyright 2007, 2008 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: + * Sergey Lapin <slapin@xxxxxxxxxxx> + * Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> + */ + +#include <linux/kernel.h> +#include <linux/skbuff.h> +#include <linux/if_arp.h> +#include <net/af_ieee802154.h> +#include <net/mac802154.h> +#include <net/ieee802154.h> +#include <net/ieee802154_netdev.h> +#include <net/nl802154.h> + +#include "mac802154.h" +#include "mib.h" + +int ieee802154_process_cmd(struct net_device *dev, struct sk_buff *skb) +{ + pr_warning("ieee802154: command frames are not yet supported\n"); + kfree_skb(skb); + return NET_RX_DROP; +} + + +static int ieee802154_mlme_assoc_req(struct net_device *dev, + struct ieee802154_addr *addr, u8 channel, u8 cap) +{ + /* We simply emulate it here */ + return ieee802154_nl_assoc_confirm(dev, + ieee802154_dev_get_short_addr(dev), + IEEE802154_SUCCESS); +} + +static int ieee802154_mlme_assoc_resp(struct net_device *dev, + struct ieee802154_addr *addr, u16 short_addr, u8 status) +{ + return 0; +} + +static int ieee802154_mlme_disassoc_req(struct net_device *dev, + struct ieee802154_addr *addr, u8 reason) +{ + return ieee802154_nl_disassoc_confirm(dev, IEEE802154_SUCCESS); +} + +static int ieee802154_mlme_start_req(struct net_device *dev, + struct ieee802154_addr *addr, + u8 channel, + u8 bcn_ord, u8 sf_ord, u8 pan_coord, u8 blx, + u8 coord_realign) +{ + /* We don't emulate beacons here at all, so START should fail */ + ieee802154_nl_start_confirm(dev, IEEE802154_INVALID_PARAMETER); + return 0; +} + +static int ieee802154_mlme_scan_req(struct net_device *dev, u8 type, + u32 channels, + u8 duration) +{ + u8 edl[27] = {}; + return ieee802154_nl_scan_confirm(dev, IEEE802154_SUCCESS, type, + channels, + type == IEEE802154_MAC_SCAN_ED ? edl : NULL); +} + + +struct ieee802154_mlme_ops mac802154_mlme = { + .assoc_req = ieee802154_mlme_assoc_req, + .assoc_resp = ieee802154_mlme_assoc_resp, + .disassoc_req = ieee802154_mlme_disassoc_req, + .start_req = ieee802154_mlme_start_req, + .scan_req = ieee802154_mlme_scan_req, + + .get_pan_id = ieee802154_dev_get_pan_id, + .get_short_addr = ieee802154_dev_get_short_addr, + .get_dsn = ieee802154_dev_get_dsn, + .get_bsn = ieee802154_dev_get_bsn, +}; + diff --git a/net/mac802154/mdev.c b/net/mac802154/mdev.c new file mode 100644 index 0000000..191e942 --- /dev/null +++ b/net/mac802154/mdev.c @@ -0,0 +1,295 @@ +/* + * Copyright (C) 2007, 2008 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. + * + */ + +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/if_arp.h> +#include <net/route.h> + +#include <net/af_ieee802154.h> +#include <net/mac802154.h> + +#include "mac802154.h" + +struct xmit_work { + struct sk_buff *skb; + struct work_struct work; + struct ieee802154_priv *priv; +}; + +static void ieee802154_xmit_worker(struct work_struct *work) +{ + struct xmit_work *xw = container_of(work, struct xmit_work, work); + int res; + + if (xw->priv->hw.current_channel != phy_cb(xw->skb)->chan) { + res = xw->priv->ops->set_channel(&xw->priv->hw, + phy_cb(xw->skb)->chan); + if (res) { + pr_debug("set_channel failed\n"); + goto out; + } + } + + res = xw->priv->ops->xmit(&xw->priv->hw, xw->skb); + +out: + /* FIXME: result processing and/or requeue!!! */ + dev_kfree_skb(xw->skb); + + kfree(xw); +} + +static int ieee802154_master_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ieee802154_priv *priv = netdev_priv(dev); + struct xmit_work *work; + + if (skb_cow_head(skb, priv->hw.extra_tx_headroom)) { + dev_kfree_skb(skb); + return NETDEV_TX_OK; + } + + work = kzalloc(sizeof(struct xmit_work), GFP_ATOMIC); + if (!work) + return NETDEV_TX_BUSY; + + INIT_WORK(&work->work, ieee802154_xmit_worker); + work->skb = skb; + work->priv = priv; + + queue_work(priv->dev_workqueue, &work->work); + + return NETDEV_TX_OK; +} + +static int ieee802154_master_open(struct net_device *dev) +{ + int rc; + struct ieee802154_priv *priv = netdev_priv(dev); + + if (!priv) { + pr_debug("%s:%s: unable to get master private data\n", + __FILE__, __func__); + return -ENODEV; + } + + if (!priv->open_count) + return -EOPNOTSUPP; + + rc = priv->ops->start(&priv->hw); + + if (!rc) + netif_tx_start_all_queues(dev); + + return rc; +} + +static int ieee802154_master_close(struct net_device *dev) +{ + struct ieee802154_priv *priv = netdev_priv(dev); + struct ieee802154_sub_if_data *sdata; + + ASSERT_RTNL(); + + /* We are under RTNL, so it's fine to do this */ + list_for_each_entry(sdata, &priv->slaves, list) + if (netif_running(sdata->dev)) + dev_close(sdata->dev); + + priv->ops->stop(&priv->hw); + + return 0; +} + +static ssize_t ieee802154_netdev_show(const struct device *dev, + struct device_attribute *attr, char *buf, + ssize_t (*format)(const struct net_device *, char *)) +{ + struct net_device *netdev = to_net_dev(dev); + ssize_t ret = -EINVAL; + + if (netdev->reg_state <= NETREG_REGISTERED) + ret = (*format)(netdev, buf); + + return ret; +} +#define MASTER_SHOW(field, format_string) \ +static ssize_t format_##field(const struct net_device *dev, char *buf) \ +{ \ + struct ieee802154_priv *priv = netdev_priv(dev); \ + return sprintf(buf, format_string, priv->hw.field); \ +} \ +static ssize_t show_##field(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + return ieee802154_netdev_show(dev, attr, buf, format_##field); \ +} \ +static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL) + +static const char fmt_long_hex[] = "%#lx\n"; +static const char fmt_hex[] = "%#x\n"; +static const char fmt_dec[] = "%d\n"; + +MASTER_SHOW(current_channel, fmt_dec); +MASTER_SHOW(channel_mask, fmt_hex); + +static struct attribute *pmib_attrs[] = { + &dev_attr_current_channel.attr, + &dev_attr_channel_mask.attr, + NULL +}; + +static struct attribute_group pmib_group = { + .name = "pib", + .attrs = pmib_attrs, +}; + +static const struct net_device_ops ieee802154_master_ops = { + .ndo_open = ieee802154_master_open, + .ndo_stop = ieee802154_master_close, + .ndo_start_xmit = ieee802154_master_hard_start_xmit, +}; + +static void ieee802154_netdev_setup_master(struct net_device *dev) +{ + dev->addr_len = 0; + dev->features = NETIF_F_NO_CSUM; + dev->hard_header_len = 0; + dev->mtu = 127; + dev->tx_queue_len = 0; + dev->type = ARPHRD_IEEE802154_PHY; + dev->flags = IFF_NOARP | IFF_BROADCAST; + dev->watchdog_timeo = 0; + + dev->netdev_ops = &ieee802154_master_ops; +} + +struct ieee802154_dev *ieee802154_alloc_device(size_t priv_size, + struct ieee802154_ops *ops) +{ + struct net_device *dev; + struct ieee802154_priv *priv; + + dev = alloc_netdev(ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_size, + "mwpan%d", ieee802154_netdev_setup_master); + if (!dev) { + printk(KERN_ERR + "Failure to initialize master IEEE802154 device\n"); + return NULL; + } + priv = netdev_priv(dev); + priv->netdev = dev; + priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN); + + BUG_ON(!dev); + BUG_ON(!ops); + BUG_ON(!ops->xmit); + BUG_ON(!ops->ed); + BUG_ON(!ops->start); + BUG_ON(!ops->stop); + + if (!try_module_get(ops->owner)) { + free_netdev(dev); + return NULL; + } + + priv->ops = ops; + + INIT_LIST_HEAD(&priv->slaves); + mutex_init(&priv->slaves_mtx); + + return &priv->hw; +} +EXPORT_SYMBOL(ieee802154_alloc_device); + +void ieee802154_free_device(struct ieee802154_dev *hw) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(hw); + + BUG_ON(!list_empty(&priv->slaves)); + BUG_ON(!priv->netdev); + + module_put(priv->ops->owner); + + free_netdev(priv->netdev); +} +EXPORT_SYMBOL(ieee802154_free_device); + +int ieee802154_register_device(struct ieee802154_dev *dev) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(dev); + struct net_device *ndev = priv->netdev; + + int rc; + + rtnl_lock(); + if (strchr(ndev->name, '%')) { + rc = dev_alloc_name(ndev, ndev->name); + if (rc < 0) + goto out_unlock; + } + + priv->dev_workqueue = + create_singlethread_workqueue(ndev->name); + if (!priv->dev_workqueue) { + rc = -ENOMEM; + goto out_unlock; + } + + ndev->needed_headroom = priv->hw.extra_tx_headroom; + SET_NETDEV_DEV(ndev, priv->hw.parent); + + ndev->sysfs_groups[1] = &pmib_group; + + rc = register_netdevice(ndev); + if (rc < 0) + goto out_wq; + + rtnl_unlock(); + + return 0; + +out_wq: + destroy_workqueue(priv->dev_workqueue); +out_unlock: + rtnl_unlock(); + return rc; +} +EXPORT_SYMBOL(ieee802154_register_device); + +void ieee802154_unregister_device(struct ieee802154_dev *dev) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(dev); + + flush_workqueue(priv->dev_workqueue); + destroy_workqueue(priv->dev_workqueue); + + rtnl_lock(); + + ieee802154_drop_slaves(dev); + unregister_netdevice(priv->netdev); + + rtnl_unlock(); +} +EXPORT_SYMBOL(ieee802154_unregister_device); + +MODULE_DESCRIPTION("IEEE 802.15.4 implementation"); +MODULE_LICENSE("GPL v2"); + diff --git a/net/mac802154/mib.h b/net/mac802154/mib.h new file mode 100644 index 0000000..57bf03f --- /dev/null +++ b/net/mac802154/mib.h @@ -0,0 +1,32 @@ +/* + * Copyright 2008 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. + * + */ + +#ifndef MIB802154_H +#define MIB802154_H + +/* FIXME: should be dropped in favour of generic MIB API */ +u8 ieee802154_dev_get_dsn(struct net_device *dev); +u8 ieee802154_dev_get_bsn(struct net_device *dev); +u16 ieee802154_dev_get_pan_id(struct net_device *dev); +u16 ieee802154_dev_get_short_addr(struct net_device *dev); +void ieee802154_dev_set_pan_id(struct net_device *dev, u16 val); +void ieee802154_dev_set_short_addr(struct net_device *dev, u16 val); +void ieee802154_dev_set_channel(struct net_device *dev, u8 chan); + + +#endif diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c new file mode 100644 index 0000000..81a269e --- /dev/null +++ b/net/mac802154/rx.c @@ -0,0 +1,98 @@ +/* + * Copyright (C) 2007, 2008, 2009 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: + * Pavel Smolenskiy <pavel.smolenskiy@xxxxxxxxx> + * Maxim Gorbachyov <maxim.gorbachev@xxxxxxxxxxx> + * Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/workqueue.h> +#include <linux/netdevice.h> + +#include <net/mac802154.h> + +#include "mac802154.h" + +static void __ieee802154_rx_prepare(struct ieee802154_dev *dev, + struct sk_buff *skb, u8 lqi) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(dev); + + BUG_ON(!skb); + + phy_cb(skb)->lqi = lqi; + + skb->dev = priv->netdev; + + skb->iif = skb->dev->ifindex; + + skb->protocol = htons(ETH_P_IEEE802154); + + skb_reset_mac_header(skb); +} + +void ieee802154_rx(struct ieee802154_dev *dev, struct sk_buff *skb, u8 lqi) +{ + struct sk_buff *skb2; + + __ieee802154_rx_prepare(dev, skb, lqi); + + skb2 = skb_clone(skb, GFP_KERNEL); + netif_rx(skb2); + + ieee802154_subif_rx(dev, skb); +} +EXPORT_SYMBOL(ieee802154_rx); + +struct rx_work { + struct sk_buff *skb; + struct work_struct work; + struct ieee802154_dev *dev; +}; + +static void ieee802154_rx_worker(struct work_struct *work) +{ + struct rx_work *rw = container_of(work, struct rx_work, work); + struct sk_buff *skb = rw->skb; + + struct sk_buff *skb2 = skb_clone(skb, GFP_KERNEL); + netif_rx(skb2); + + ieee802154_subif_rx(rw->dev, skb); + kfree(rw); +} + +void ieee802154_rx_irqsafe(struct ieee802154_dev *dev, + struct sk_buff *skb, u8 lqi) +{ + struct ieee802154_priv *priv = ieee802154_to_priv(dev); + struct rx_work *work = kzalloc(sizeof(struct rx_work), GFP_ATOMIC); + + if (!work) + return; + + __ieee802154_rx_prepare(dev, skb, lqi); + + INIT_WORK(&work->work, ieee802154_rx_worker); + work->skb = skb; + work->dev = dev; + + queue_work(priv->dev_workqueue, &work->work); +} +EXPORT_SYMBOL(ieee802154_rx_irqsafe); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
