2 * Copyright (C) 2007-2012 Siemens AG
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.
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.
14 * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
15 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
16 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
17 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/netdevice.h>
23 #include <linux/crc-ccitt.h>
25 #include <net/mac802154.h>
26 #include <net/ieee802154_netdev.h>
27 #include <net/rtnetlink.h>
28 #include <linux/nl802154.h>
30 #include "ieee802154_i.h"
32 static int mac802154_process_data(struct net_device
*dev
, struct sk_buff
*skb
)
34 return netif_receive_skb(skb
);
38 mac802154_subif_frame(struct ieee802154_sub_if_data
*sdata
, struct sk_buff
*skb
,
39 const struct ieee802154_hdr
*hdr
)
44 pr_debug("getting packet via slave interface %s\n", sdata
->dev
->name
);
46 spin_lock_bh(&sdata
->mib_lock
);
49 sshort
= sdata
->short_addr
;
51 switch (mac_cb(skb
)->dest
.mode
) {
52 case IEEE802154_ADDR_NONE
:
53 if (mac_cb(skb
)->dest
.mode
!= IEEE802154_ADDR_NONE
)
54 /* FIXME: check if we are PAN coordinator */
55 skb
->pkt_type
= PACKET_OTHERHOST
;
57 /* ACK comes with both addresses empty */
58 skb
->pkt_type
= PACKET_HOST
;
60 case IEEE802154_ADDR_LONG
:
61 if (mac_cb(skb
)->dest
.pan_id
!= span
&&
62 mac_cb(skb
)->dest
.pan_id
!= cpu_to_le16(IEEE802154_PANID_BROADCAST
))
63 skb
->pkt_type
= PACKET_OTHERHOST
;
64 else if (mac_cb(skb
)->dest
.extended_addr
== sdata
->extended_addr
)
65 skb
->pkt_type
= PACKET_HOST
;
67 skb
->pkt_type
= PACKET_OTHERHOST
;
69 case IEEE802154_ADDR_SHORT
:
70 if (mac_cb(skb
)->dest
.pan_id
!= span
&&
71 mac_cb(skb
)->dest
.pan_id
!= cpu_to_le16(IEEE802154_PANID_BROADCAST
))
72 skb
->pkt_type
= PACKET_OTHERHOST
;
73 else if (mac_cb(skb
)->dest
.short_addr
== sshort
)
74 skb
->pkt_type
= PACKET_HOST
;
75 else if (mac_cb(skb
)->dest
.short_addr
==
76 cpu_to_le16(IEEE802154_ADDR_BROADCAST
))
77 skb
->pkt_type
= PACKET_BROADCAST
;
79 skb
->pkt_type
= PACKET_OTHERHOST
;
82 spin_unlock_bh(&sdata
->mib_lock
);
83 pr_debug("invalid dest mode\n");
88 spin_unlock_bh(&sdata
->mib_lock
);
90 skb
->dev
= sdata
->dev
;
92 rc
= mac802154_llsec_decrypt(&sdata
->sec
, skb
);
94 pr_debug("decryption failed: %i\n", rc
);
98 sdata
->dev
->stats
.rx_packets
++;
99 sdata
->dev
->stats
.rx_bytes
+= skb
->len
;
101 switch (mac_cb(skb
)->type
) {
102 case IEEE802154_FC_TYPE_DATA
:
103 return mac802154_process_data(sdata
->dev
, skb
);
105 pr_warn("ieee802154: bad frame received (type = %d)\n",
115 static void mac802154_print_addr(const char *name
,
116 const struct ieee802154_addr
*addr
)
118 if (addr
->mode
== IEEE802154_ADDR_NONE
)
119 pr_debug("%s not present\n", name
);
121 pr_debug("%s PAN ID: %04x\n", name
, le16_to_cpu(addr
->pan_id
));
122 if (addr
->mode
== IEEE802154_ADDR_SHORT
) {
123 pr_debug("%s is short: %04x\n", name
,
124 le16_to_cpu(addr
->short_addr
));
126 u64 hw
= swab64((__force u64
)addr
->extended_addr
);
128 pr_debug("%s is hardware: %8phC\n", name
, &hw
);
132 static int mac802154_parse_frame_start(struct sk_buff
*skb
,
133 struct ieee802154_hdr
*hdr
)
136 struct ieee802154_mac_cb
*cb
= mac_cb_init(skb
);
138 hlen
= ieee802154_hdr_pull(skb
, hdr
);
144 pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16
*)&hdr
->fc
),
147 cb
->type
= hdr
->fc
.type
;
148 cb
->ackreq
= hdr
->fc
.ack_request
;
149 cb
->secen
= hdr
->fc
.security_enabled
;
151 mac802154_print_addr("destination", &hdr
->dest
);
152 mac802154_print_addr("source", &hdr
->source
);
154 cb
->source
= hdr
->source
;
155 cb
->dest
= hdr
->dest
;
157 if (hdr
->fc
.security_enabled
) {
160 pr_debug("seclevel %i\n", hdr
->sec
.level
);
162 switch (hdr
->sec
.key_id_mode
) {
163 case IEEE802154_SCF_KEY_IMPLICIT
:
164 pr_debug("implicit key\n");
167 case IEEE802154_SCF_KEY_INDEX
:
168 pr_debug("key %02x\n", hdr
->sec
.key_id
);
171 case IEEE802154_SCF_KEY_SHORT_INDEX
:
172 pr_debug("key %04x:%04x %02x\n",
173 le32_to_cpu(hdr
->sec
.short_src
) >> 16,
174 le32_to_cpu(hdr
->sec
.short_src
) & 0xffff,
178 case IEEE802154_SCF_KEY_HW_INDEX
:
179 key
= swab64((__force u64
)hdr
->sec
.extended_src
);
180 pr_debug("key source %8phC %02x\n", &key
,
190 mac802154_wpans_rx(struct ieee802154_local
*local
, struct sk_buff
*skb
)
193 struct ieee802154_sub_if_data
*sdata
;
194 struct ieee802154_hdr hdr
;
196 ret
= mac802154_parse_frame_start(skb
, &hdr
);
198 pr_debug("got invalid frame\n");
204 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
205 if (sdata
->type
!= IEEE802154_DEV_WPAN
||
206 !netif_running(sdata
->dev
))
209 mac802154_subif_frame(sdata
, skb
, &hdr
);
220 mac802154_monitors_rx(struct ieee802154_local
*local
, struct sk_buff
*skb
)
222 struct sk_buff
*skb2
;
223 struct ieee802154_sub_if_data
*sdata
;
224 u16 crc
= crc_ccitt(0, skb
->data
, skb
->len
);
228 list_for_each_entry_rcu(sdata
, &local
->interfaces
, list
) {
229 if (sdata
->type
!= IEEE802154_DEV_MONITOR
||
230 !netif_running(sdata
->dev
))
233 skb2
= skb_clone(skb
, GFP_ATOMIC
);
234 skb2
->dev
= sdata
->dev
;
235 skb2
->pkt_type
= PACKET_HOST
;
236 data
= skb_put(skb2
, 2);
237 data
[0] = crc
& 0xff;
246 mac802154_subif_rx(struct ieee802154_hw
*hw
, struct sk_buff
*skb
)
248 struct ieee802154_local
*local
= hw_to_local(hw
);
250 skb
->protocol
= htons(ETH_P_IEEE802154
);
251 skb_reset_mac_header(skb
);
253 if (!(local
->hw
.flags
& IEEE802154_HW_OMIT_CKSUM
)) {
257 pr_debug("got invalid frame\n");
260 crc
= crc_ccitt(0, skb
->data
, skb
->len
);
262 pr_debug("CRC mismatch\n");
265 skb_trim(skb
, skb
->len
- 2); /* CRC */
268 mac802154_monitors_rx(local
, skb
);
269 mac802154_wpans_rx(local
, skb
);
277 void ieee802154_rx(struct ieee802154_hw
*hw
, struct sk_buff
*skb
)
279 WARN_ON_ONCE(softirq_count() == 0);
281 mac802154_subif_rx(hw
, skb
);
283 EXPORT_SYMBOL(ieee802154_rx
);
286 ieee802154_rx_irqsafe(struct ieee802154_hw
*hw
, struct sk_buff
*skb
, u8 lqi
)
288 struct ieee802154_local
*local
= hw_to_local(hw
);
290 mac_cb(skb
)->lqi
= lqi
;
291 skb
->pkt_type
= IEEE802154_RX_MSG
;
292 skb_queue_tail(&local
->skb_queue
, skb
);
293 tasklet_schedule(&local
->tasklet
);
295 EXPORT_SYMBOL(ieee802154_rx_irqsafe
);