Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright 2007, 2008, 2009 Siemens AG
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Written by:
18 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
19 * Sergey Lapin <slapin@ossfans.org>
20 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
21 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
22 */
23
24#include <linux/netdevice.h>
25#include <linux/skbuff.h>
26#include <linux/if_arp.h>
27#include <linux/crc-ccitt.h>
28
29#include <net/ieee802154.h>
30#include <net/mac802154.h>
31#include <net/netlink.h>
32#include <net/wpan-phy.h>
33#include <linux/nl802154.h>
34
35#include "mac802154.h"
36
37static netdev_tx_t mac802154_monitor_xmit(struct sk_buff *skb,
38 struct net_device *dev)
39{
40 struct mac802154_sub_if_data *priv;
41 u8 chan, page;
42
43 priv = netdev_priv(dev);
44
45 /* FIXME: locking */
46 chan = priv->hw->phy->current_channel;
47 page = priv->hw->phy->current_page;
48
49 if (chan == MAC802154_CHAN_NONE) /* not initialized */
50 return NETDEV_TX_OK;
51
52 if (WARN_ON(page >= WPAN_NUM_PAGES) ||
53 WARN_ON(chan >= WPAN_NUM_CHANNELS))
54 return NETDEV_TX_OK;
55
56 skb->skb_iif = dev->ifindex;
57 dev->stats.tx_packets++;
58 dev->stats.tx_bytes += skb->len;
59
60 return mac802154_tx(priv->hw, skb, page, chan);
61}
62
63
64void mac802154_monitors_rx(struct mac802154_priv *priv, struct sk_buff *skb)
65{
66 struct sk_buff *skb2;
67 struct mac802154_sub_if_data *sdata;
68 u16 crc = crc_ccitt(0, skb->data, skb->len);
69 u8 *data;
70
71 rcu_read_lock();
72 list_for_each_entry_rcu(sdata, &priv->slaves, list) {
73 if (sdata->type != IEEE802154_DEV_MONITOR)
74 continue;
75
76 skb2 = skb_clone(skb, GFP_ATOMIC);
77 skb2->dev = sdata->dev;
78 skb2->pkt_type = PACKET_HOST;
79 data = skb_put(skb2, 2);
80 data[0] = crc & 0xff;
81 data[1] = crc >> 8;
82
83 netif_rx_ni(skb2);
84 }
85 rcu_read_unlock();
86}
87
88static const struct net_device_ops mac802154_monitor_ops = {
89 .ndo_open = mac802154_slave_open,
90 .ndo_stop = mac802154_slave_close,
91 .ndo_start_xmit = mac802154_monitor_xmit,
92};
93
94void mac802154_monitor_setup(struct net_device *dev)
95{
96 struct mac802154_sub_if_data *priv;
97
98 dev->addr_len = 0;
99 dev->hard_header_len = 0;
100 dev->needed_tailroom = 2; /* room for FCS */
101 dev->mtu = IEEE802154_MTU;
102 dev->tx_queue_len = 10;
103 dev->type = ARPHRD_IEEE802154_MONITOR;
104 dev->flags = IFF_NOARP | IFF_BROADCAST;
105 dev->watchdog_timeo = 0;
106
107 dev->destructor = free_netdev;
108 dev->netdev_ops = &mac802154_monitor_ops;
109 dev->ml_priv = &mac802154_mlme_reduced;
110
111 priv = netdev_priv(dev);
112 priv->type = IEEE802154_DEV_MONITOR;
113
114 priv->chan = MAC802154_CHAN_NONE; /* not initialized */
115 priv->page = 0;
116}