| /* |
| * 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. |
| * |
| * 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/skbuff.h> |
| #include <linux/if_arp.h> |
| #include <linux/crc-ccitt.h> |
| #include <linux/ieee802154.h> |
| |
| #include <net/mac802154.h> |
| #include <net/netlink.h> |
| #include <net/cfg802154.h> |
| #include <linux/nl802154.h> |
| |
| #include "ieee802154_i.h" |
| |
| void mac802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb) |
| { |
| struct sk_buff *skb2; |
| struct ieee802154_sub_if_data *sdata; |
| u16 crc = crc_ccitt(0, skb->data, skb->len); |
| u8 *data; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
| if (sdata->type != IEEE802154_DEV_MONITOR || |
| !netif_running(sdata->dev)) |
| continue; |
| |
| skb2 = skb_clone(skb, GFP_ATOMIC); |
| skb2->dev = sdata->dev; |
| skb2->pkt_type = PACKET_HOST; |
| data = skb_put(skb2, 2); |
| data[0] = crc & 0xff; |
| data[1] = crc >> 8; |
| |
| netif_rx_ni(skb2); |
| } |
| rcu_read_unlock(); |
| } |
| |
| static const struct net_device_ops mac802154_monitor_ops = { |
| .ndo_open = mac802154_slave_open, |
| .ndo_stop = mac802154_slave_close, |
| .ndo_start_xmit = ieee802154_monitor_start_xmit, |
| }; |
| |
| void mac802154_monitor_setup(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata; |
| |
| dev->addr_len = 0; |
| dev->hard_header_len = 0; |
| dev->needed_tailroom = 2; /* room for FCS */ |
| dev->mtu = IEEE802154_MTU; |
| dev->tx_queue_len = 10; |
| dev->type = ARPHRD_IEEE802154_MONITOR; |
| dev->flags = IFF_NOARP | IFF_BROADCAST; |
| dev->watchdog_timeo = 0; |
| |
| dev->destructor = free_netdev; |
| dev->netdev_ops = &mac802154_monitor_ops; |
| dev->ml_priv = &mac802154_mlme_reduced; |
| |
| sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| sdata->type = IEEE802154_DEV_MONITOR; |
| |
| sdata->chan = MAC802154_CHAN_NONE; /* not initialized */ |
| sdata->page = 0; |
| } |