2 * Copyright 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 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
15 * Sergey Lapin <slapin@ossfans.org>
16 * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
17 * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
20 #include <linux/netdevice.h>
21 #include <linux/module.h>
22 #include <linux/if_arp.h>
24 #include <net/rtnetlink.h>
25 #include <linux/nl802154.h>
26 #include <net/af_ieee802154.h>
27 #include <net/mac802154.h>
28 #include <net/ieee802154_netdev.h>
29 #include <net/ieee802154.h>
30 #include <net/wpan-phy.h>
32 #include "ieee802154_i.h"
34 static int mac802154_wpan_update_llsec(struct net_device
*dev
)
36 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
37 struct ieee802154_mlme_ops
*ops
= ieee802154_mlme_ops(dev
);
41 struct ieee802154_llsec_params params
;
44 params
.pan_id
= priv
->pan_id
;
45 changed
|= IEEE802154_LLSEC_PARAM_PAN_ID
;
47 params
.hwaddr
= priv
->extended_addr
;
48 changed
|= IEEE802154_LLSEC_PARAM_HWADDR
;
50 rc
= ops
->llsec
->set_params(dev
, ¶ms
, changed
);
57 mac802154_wpan_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
59 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
60 struct sockaddr_ieee802154
*sa
=
61 (struct sockaddr_ieee802154
*)&ifr
->ifr_addr
;
62 int err
= -ENOIOCTLCMD
;
64 spin_lock_bh(&priv
->mib_lock
);
69 u16 pan_id
, short_addr
;
71 pan_id
= le16_to_cpu(priv
->pan_id
);
72 short_addr
= le16_to_cpu(priv
->short_addr
);
73 if (pan_id
== IEEE802154_PANID_BROADCAST
||
74 short_addr
== IEEE802154_ADDR_BROADCAST
) {
79 sa
->family
= AF_IEEE802154
;
80 sa
->addr
.addr_type
= IEEE802154_ADDR_SHORT
;
81 sa
->addr
.pan_id
= pan_id
;
82 sa
->addr
.short_addr
= short_addr
;
89 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
90 if (sa
->family
!= AF_IEEE802154
||
91 sa
->addr
.addr_type
!= IEEE802154_ADDR_SHORT
||
92 sa
->addr
.pan_id
== IEEE802154_PANID_BROADCAST
||
93 sa
->addr
.short_addr
== IEEE802154_ADDR_BROADCAST
||
94 sa
->addr
.short_addr
== IEEE802154_ADDR_UNDEF
) {
99 priv
->pan_id
= cpu_to_le16(sa
->addr
.pan_id
);
100 priv
->short_addr
= cpu_to_le16(sa
->addr
.short_addr
);
102 err
= mac802154_wpan_update_llsec(dev
);
106 spin_unlock_bh(&priv
->mib_lock
);
110 static int mac802154_wpan_mac_addr(struct net_device
*dev
, void *p
)
112 struct sockaddr
*addr
= p
;
114 if (netif_running(dev
))
117 /* FIXME: validate addr */
118 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
119 mac802154_dev_set_ieee_addr(dev
);
120 return mac802154_wpan_update_llsec(dev
);
123 int mac802154_set_mac_params(struct net_device
*dev
,
124 const struct ieee802154_mac_params
*params
)
126 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
128 mutex_lock(&priv
->hw
->slaves_mtx
);
129 priv
->mac_params
= *params
;
130 mutex_unlock(&priv
->hw
->slaves_mtx
);
135 void mac802154_get_mac_params(struct net_device
*dev
,
136 struct ieee802154_mac_params
*params
)
138 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
140 mutex_lock(&priv
->hw
->slaves_mtx
);
141 *params
= priv
->mac_params
;
142 mutex_unlock(&priv
->hw
->slaves_mtx
);
145 static int mac802154_wpan_open(struct net_device
*dev
)
148 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
149 struct wpan_phy
*phy
= priv
->hw
->phy
;
151 rc
= mac802154_slave_open(dev
);
155 mutex_lock(&phy
->pib_lock
);
157 if (phy
->set_txpower
) {
158 rc
= phy
->set_txpower(phy
, priv
->mac_params
.transmit_power
);
164 rc
= phy
->set_lbt(phy
, priv
->mac_params
.lbt
);
169 if (phy
->set_cca_mode
) {
170 rc
= phy
->set_cca_mode(phy
, priv
->mac_params
.cca_mode
);
175 if (phy
->set_cca_ed_level
) {
176 rc
= phy
->set_cca_ed_level(phy
, priv
->mac_params
.cca_ed_level
);
181 if (phy
->set_csma_params
) {
182 rc
= phy
->set_csma_params(phy
, priv
->mac_params
.min_be
,
183 priv
->mac_params
.max_be
,
184 priv
->mac_params
.csma_retries
);
189 if (phy
->set_frame_retries
) {
190 rc
= phy
->set_frame_retries(phy
,
191 priv
->mac_params
.frame_retries
);
196 mutex_unlock(&phy
->pib_lock
);
200 mutex_unlock(&phy
->pib_lock
);
204 static int mac802154_set_header_security(struct mac802154_sub_if_data
*priv
,
205 struct ieee802154_hdr
*hdr
,
206 const struct ieee802154_mac_cb
*cb
)
208 struct ieee802154_llsec_params params
;
211 mac802154_llsec_get_params(&priv
->sec
, ¶ms
);
213 if (!params
.enabled
&& cb
->secen_override
&& cb
->secen
)
215 if (!params
.enabled
||
216 (cb
->secen_override
&& !cb
->secen
) ||
219 if (cb
->seclevel_override
&& !cb
->seclevel
)
222 level
= cb
->seclevel_override
? cb
->seclevel
: params
.out_level
;
224 hdr
->fc
.security_enabled
= 1;
225 hdr
->sec
.level
= level
;
226 hdr
->sec
.key_id_mode
= params
.out_key
.mode
;
227 if (params
.out_key
.mode
== IEEE802154_SCF_KEY_SHORT_INDEX
)
228 hdr
->sec
.short_src
= params
.out_key
.short_source
;
229 else if (params
.out_key
.mode
== IEEE802154_SCF_KEY_HW_INDEX
)
230 hdr
->sec
.extended_src
= params
.out_key
.extended_source
;
231 hdr
->sec
.key_id
= params
.out_key
.id
;
236 static int mac802154_header_create(struct sk_buff
*skb
,
237 struct net_device
*dev
,
243 struct ieee802154_hdr hdr
;
244 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
245 struct ieee802154_mac_cb
*cb
= mac_cb(skb
);
251 memset(&hdr
.fc
, 0, sizeof(hdr
.fc
));
252 hdr
.fc
.type
= cb
->type
;
253 hdr
.fc
.security_enabled
= cb
->secen
;
254 hdr
.fc
.ack_request
= cb
->ackreq
;
255 hdr
.seq
= ieee802154_mlme_ops(dev
)->get_dsn(dev
);
257 if (mac802154_set_header_security(priv
, &hdr
, cb
) < 0)
261 spin_lock_bh(&priv
->mib_lock
);
263 if (priv
->short_addr
== cpu_to_le16(IEEE802154_ADDR_BROADCAST
) ||
264 priv
->short_addr
== cpu_to_le16(IEEE802154_ADDR_UNDEF
) ||
265 priv
->pan_id
== cpu_to_le16(IEEE802154_PANID_BROADCAST
)) {
266 hdr
.source
.mode
= IEEE802154_ADDR_LONG
;
267 hdr
.source
.extended_addr
= priv
->extended_addr
;
269 hdr
.source
.mode
= IEEE802154_ADDR_SHORT
;
270 hdr
.source
.short_addr
= priv
->short_addr
;
273 hdr
.source
.pan_id
= priv
->pan_id
;
275 spin_unlock_bh(&priv
->mib_lock
);
277 hdr
.source
= *(const struct ieee802154_addr
*)saddr
;
280 hdr
.dest
= *(const struct ieee802154_addr
*)daddr
;
282 hlen
= ieee802154_hdr_push(skb
, &hdr
);
286 skb_reset_mac_header(skb
);
289 if (len
> ieee802154_max_payload(&hdr
))
296 mac802154_header_parse(const struct sk_buff
*skb
, unsigned char *haddr
)
298 struct ieee802154_hdr hdr
;
299 struct ieee802154_addr
*addr
= (struct ieee802154_addr
*)haddr
;
301 if (ieee802154_hdr_peek_addrs(skb
, &hdr
) < 0) {
302 pr_debug("malformed packet\n");
307 return sizeof(*addr
);
311 mac802154_wpan_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
313 struct mac802154_sub_if_data
*priv
;
317 priv
= netdev_priv(dev
);
319 spin_lock_bh(&priv
->mib_lock
);
322 spin_unlock_bh(&priv
->mib_lock
);
324 if (chan
== MAC802154_CHAN_NONE
||
325 page
>= WPAN_NUM_PAGES
||
326 chan
>= WPAN_NUM_CHANNELS
) {
331 rc
= mac802154_llsec_encrypt(&priv
->sec
, skb
);
333 pr_warn("encryption failed: %i\n", rc
);
338 skb
->skb_iif
= dev
->ifindex
;
339 dev
->stats
.tx_packets
++;
340 dev
->stats
.tx_bytes
+= skb
->len
;
342 return mac802154_tx(priv
->hw
, skb
, page
, chan
);
345 static struct header_ops mac802154_header_ops
= {
346 .create
= mac802154_header_create
,
347 .parse
= mac802154_header_parse
,
350 static const struct net_device_ops mac802154_wpan_ops
= {
351 .ndo_open
= mac802154_wpan_open
,
352 .ndo_stop
= mac802154_slave_close
,
353 .ndo_start_xmit
= mac802154_wpan_xmit
,
354 .ndo_do_ioctl
= mac802154_wpan_ioctl
,
355 .ndo_set_mac_address
= mac802154_wpan_mac_addr
,
358 static void mac802154_wpan_free(struct net_device
*dev
)
360 struct mac802154_sub_if_data
*priv
= netdev_priv(dev
);
362 mac802154_llsec_destroy(&priv
->sec
);
367 void mac802154_wpan_setup(struct net_device
*dev
)
369 struct mac802154_sub_if_data
*priv
;
371 dev
->addr_len
= IEEE802154_ADDR_LEN
;
372 memset(dev
->broadcast
, 0xff, IEEE802154_ADDR_LEN
);
374 dev
->hard_header_len
= MAC802154_FRAME_HARD_HEADER_LEN
;
375 dev
->header_ops
= &mac802154_header_ops
;
376 dev
->needed_tailroom
= 2 + 16; /* FCS + MIC */
377 dev
->mtu
= IEEE802154_MTU
;
378 dev
->tx_queue_len
= 300;
379 dev
->type
= ARPHRD_IEEE802154
;
380 dev
->flags
= IFF_NOARP
| IFF_BROADCAST
;
381 dev
->watchdog_timeo
= 0;
383 dev
->destructor
= mac802154_wpan_free
;
384 dev
->netdev_ops
= &mac802154_wpan_ops
;
385 dev
->ml_priv
= &mac802154_mlme_wpan
;
387 priv
= netdev_priv(dev
);
388 priv
->type
= IEEE802154_DEV_WPAN
;
390 priv
->chan
= MAC802154_CHAN_NONE
;
393 spin_lock_init(&priv
->mib_lock
);
394 mutex_init(&priv
->sec_mtx
);
396 get_random_bytes(&priv
->bsn
, 1);
397 get_random_bytes(&priv
->dsn
, 1);
399 /* defaults per 802.15.4-2011 */
400 priv
->mac_params
.min_be
= 3;
401 priv
->mac_params
.max_be
= 5;
402 priv
->mac_params
.csma_retries
= 4;
403 priv
->mac_params
.frame_retries
= -1; /* for compatibility, actual default is 3 */
405 priv
->pan_id
= cpu_to_le16(IEEE802154_PANID_BROADCAST
);
406 priv
->short_addr
= cpu_to_le16(IEEE802154_ADDR_BROADCAST
);
408 mac802154_llsec_init(&priv
->sec
);
411 static int mac802154_process_data(struct net_device
*dev
, struct sk_buff
*skb
)
413 return netif_rx_ni(skb
);
417 mac802154_subif_frame(struct mac802154_sub_if_data
*sdata
, struct sk_buff
*skb
,
418 const struct ieee802154_hdr
*hdr
)
423 pr_debug("getting packet via slave interface %s\n", sdata
->dev
->name
);
425 spin_lock_bh(&sdata
->mib_lock
);
427 span
= sdata
->pan_id
;
428 sshort
= sdata
->short_addr
;
430 switch (mac_cb(skb
)->dest
.mode
) {
431 case IEEE802154_ADDR_NONE
:
432 if (mac_cb(skb
)->dest
.mode
!= IEEE802154_ADDR_NONE
)
433 /* FIXME: check if we are PAN coordinator */
434 skb
->pkt_type
= PACKET_OTHERHOST
;
436 /* ACK comes with both addresses empty */
437 skb
->pkt_type
= PACKET_HOST
;
439 case IEEE802154_ADDR_LONG
:
440 if (mac_cb(skb
)->dest
.pan_id
!= span
&&
441 mac_cb(skb
)->dest
.pan_id
!= cpu_to_le16(IEEE802154_PANID_BROADCAST
))
442 skb
->pkt_type
= PACKET_OTHERHOST
;
443 else if (mac_cb(skb
)->dest
.extended_addr
== sdata
->extended_addr
)
444 skb
->pkt_type
= PACKET_HOST
;
446 skb
->pkt_type
= PACKET_OTHERHOST
;
448 case IEEE802154_ADDR_SHORT
:
449 if (mac_cb(skb
)->dest
.pan_id
!= span
&&
450 mac_cb(skb
)->dest
.pan_id
!= cpu_to_le16(IEEE802154_PANID_BROADCAST
))
451 skb
->pkt_type
= PACKET_OTHERHOST
;
452 else if (mac_cb(skb
)->dest
.short_addr
== sshort
)
453 skb
->pkt_type
= PACKET_HOST
;
454 else if (mac_cb(skb
)->dest
.short_addr
==
455 cpu_to_le16(IEEE802154_ADDR_BROADCAST
))
456 skb
->pkt_type
= PACKET_BROADCAST
;
458 skb
->pkt_type
= PACKET_OTHERHOST
;
461 spin_unlock_bh(&sdata
->mib_lock
);
462 pr_debug("invalid dest mode\n");
467 spin_unlock_bh(&sdata
->mib_lock
);
469 skb
->dev
= sdata
->dev
;
471 rc
= mac802154_llsec_decrypt(&sdata
->sec
, skb
);
473 pr_debug("decryption failed: %i\n", rc
);
477 sdata
->dev
->stats
.rx_packets
++;
478 sdata
->dev
->stats
.rx_bytes
+= skb
->len
;
480 switch (mac_cb(skb
)->type
) {
481 case IEEE802154_FC_TYPE_DATA
:
482 return mac802154_process_data(sdata
->dev
, skb
);
484 pr_warn("ieee802154: bad frame received (type = %d)\n",
494 static void mac802154_print_addr(const char *name
,
495 const struct ieee802154_addr
*addr
)
497 if (addr
->mode
== IEEE802154_ADDR_NONE
)
498 pr_debug("%s not present\n", name
);
500 pr_debug("%s PAN ID: %04x\n", name
, le16_to_cpu(addr
->pan_id
));
501 if (addr
->mode
== IEEE802154_ADDR_SHORT
) {
502 pr_debug("%s is short: %04x\n", name
,
503 le16_to_cpu(addr
->short_addr
));
505 u64 hw
= swab64((__force u64
) addr
->extended_addr
);
507 pr_debug("%s is hardware: %8phC\n", name
, &hw
);
511 static int mac802154_parse_frame_start(struct sk_buff
*skb
,
512 struct ieee802154_hdr
*hdr
)
515 struct ieee802154_mac_cb
*cb
= mac_cb_init(skb
);
517 hlen
= ieee802154_hdr_pull(skb
, hdr
);
523 pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16
*)&hdr
->fc
),
526 cb
->type
= hdr
->fc
.type
;
527 cb
->ackreq
= hdr
->fc
.ack_request
;
528 cb
->secen
= hdr
->fc
.security_enabled
;
530 mac802154_print_addr("destination", &hdr
->dest
);
531 mac802154_print_addr("source", &hdr
->source
);
533 cb
->source
= hdr
->source
;
534 cb
->dest
= hdr
->dest
;
536 if (hdr
->fc
.security_enabled
) {
539 pr_debug("seclevel %i\n", hdr
->sec
.level
);
541 switch (hdr
->sec
.key_id_mode
) {
542 case IEEE802154_SCF_KEY_IMPLICIT
:
543 pr_debug("implicit key\n");
546 case IEEE802154_SCF_KEY_INDEX
:
547 pr_debug("key %02x\n", hdr
->sec
.key_id
);
550 case IEEE802154_SCF_KEY_SHORT_INDEX
:
551 pr_debug("key %04x:%04x %02x\n",
552 le32_to_cpu(hdr
->sec
.short_src
) >> 16,
553 le32_to_cpu(hdr
->sec
.short_src
) & 0xffff,
557 case IEEE802154_SCF_KEY_HW_INDEX
:
558 key
= swab64((__force u64
) hdr
->sec
.extended_src
);
559 pr_debug("key source %8phC %02x\n", &key
,
568 void mac802154_wpans_rx(struct mac802154_priv
*priv
, struct sk_buff
*skb
)
571 struct mac802154_sub_if_data
*sdata
;
572 struct ieee802154_hdr hdr
;
574 ret
= mac802154_parse_frame_start(skb
, &hdr
);
576 pr_debug("got invalid frame\n");
582 list_for_each_entry_rcu(sdata
, &priv
->slaves
, list
) {
583 if (sdata
->type
!= IEEE802154_DEV_WPAN
||
584 !netif_running(sdata
->dev
))
587 mac802154_subif_frame(sdata
, skb
, &hdr
);