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>
23 #include <linux/ieee802154.h>
25 #include <net/nl802154.h>
26 #include <net/mac802154.h>
27 #include <net/ieee802154_netdev.h>
28 #include <net/cfg802154.h>
30 #include "ieee802154_i.h"
31 #include "driver-ops.h"
33 int mac802154_wpan_update_llsec(struct net_device *dev)
35 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
36 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
37 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
41 struct ieee802154_llsec_params params;
44 params.pan_id = wpan_dev->pan_id;
45 changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
47 params.hwaddr = wpan_dev->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 ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
60 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
61 struct sockaddr_ieee802154 *sa =
62 (struct sockaddr_ieee802154 *)&ifr->ifr_addr;
63 int err = -ENOIOCTLCMD;
65 if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR)
73 u16 pan_id, short_addr;
75 pan_id = le16_to_cpu(wpan_dev->pan_id);
76 short_addr = le16_to_cpu(wpan_dev->short_addr);
77 if (pan_id == IEEE802154_PANID_BROADCAST ||
78 short_addr == IEEE802154_ADDR_BROADCAST) {
83 sa->family = AF_IEEE802154;
84 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
85 sa->addr.pan_id = pan_id;
86 sa->addr.short_addr = short_addr;
92 if (netif_running(dev)) {
98 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
99 if (sa->family != AF_IEEE802154 ||
100 sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
101 sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
102 sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
103 sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
108 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
109 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
111 err = mac802154_wpan_update_llsec(dev);
119 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
121 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
122 struct sockaddr *addr = p;
123 __le64 extended_addr;
125 if (netif_running(dev))
128 /* lowpan need to be down for update
129 * SLAAC address after ifup
131 if (sdata->wpan_dev.lowpan_dev) {
132 if (netif_running(sdata->wpan_dev.lowpan_dev))
136 ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
137 if (!ieee802154_is_valid_extended_unicast_addr(extended_addr))
140 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
141 sdata->wpan_dev.extended_addr = extended_addr;
143 /* update lowpan interface mac address when
144 * wpan mac has been changed
146 if (sdata->wpan_dev.lowpan_dev)
147 memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr,
150 return mac802154_wpan_update_llsec(dev);
153 static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata)
155 struct ieee802154_local *local = sdata->local;
156 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
159 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
160 ret = drv_set_promiscuous_mode(local,
161 wpan_dev->promiscuous_mode);
166 if (local->hw.flags & IEEE802154_HW_AFILT) {
167 ret = drv_set_pan_id(local, wpan_dev->pan_id);
171 ret = drv_set_extended_addr(local, wpan_dev->extended_addr);
175 ret = drv_set_short_addr(local, wpan_dev->short_addr);
180 if (local->hw.flags & IEEE802154_HW_LBT) {
181 ret = drv_set_lbt_mode(local, wpan_dev->lbt);
186 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
187 ret = drv_set_csma_params(local, wpan_dev->min_be,
189 wpan_dev->csma_retries);
194 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
195 ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
203 static int mac802154_slave_open(struct net_device *dev)
205 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
206 struct ieee802154_local *local = sdata->local;
211 set_bit(SDATA_STATE_RUNNING, &sdata->state);
213 if (!local->open_count) {
214 res = ieee802154_setup_hw(sdata);
218 res = drv_start(local);
224 netif_start_queue(dev);
227 /* might already be clear but that doesn't matter */
228 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
234 ieee802154_check_mac_settings(struct ieee802154_local *local,
235 struct wpan_dev *wpan_dev,
236 struct wpan_dev *nwpan_dev)
240 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
241 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
245 if (local->hw.flags & IEEE802154_HW_AFILT) {
246 if (wpan_dev->pan_id != nwpan_dev->pan_id ||
247 wpan_dev->short_addr != nwpan_dev->short_addr ||
248 wpan_dev->extended_addr != nwpan_dev->extended_addr)
252 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
253 if (wpan_dev->min_be != nwpan_dev->min_be ||
254 wpan_dev->max_be != nwpan_dev->max_be ||
255 wpan_dev->csma_retries != nwpan_dev->csma_retries)
259 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
260 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
264 if (local->hw.flags & IEEE802154_HW_LBT) {
265 if (wpan_dev->lbt != nwpan_dev->lbt)
273 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
274 enum nl802154_iftype iftype)
276 struct ieee802154_local *local = sdata->local;
277 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
278 struct ieee802154_sub_if_data *nsdata;
280 /* we hold the RTNL here so can safely walk the list */
281 list_for_each_entry(nsdata, &local->interfaces, list) {
282 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
285 /* TODO currently we don't support multiple node types
286 * we need to run skb_clone at rx path. Check if there
287 * exist really an use case if we need to support
288 * multiple node types at the same time.
290 if (wpan_dev->iftype == NL802154_IFTYPE_NODE &&
291 nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE)
294 /* check all phy mac sublayer settings are the same.
295 * We have only one phy, different values makes trouble.
297 ret = ieee802154_check_mac_settings(local, wpan_dev,
307 static int mac802154_wpan_open(struct net_device *dev)
310 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
311 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
313 rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype);
317 return mac802154_slave_open(dev);
320 static int mac802154_slave_close(struct net_device *dev)
322 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
323 struct ieee802154_local *local = sdata->local;
327 netif_stop_queue(dev);
330 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
332 if (!local->open_count)
333 ieee802154_stop_device(local);
338 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
339 struct ieee802154_hdr *hdr,
340 const struct ieee802154_mac_cb *cb)
342 struct ieee802154_llsec_params params;
345 mac802154_llsec_get_params(&sdata->sec, ¶ms);
347 if (!params.enabled && cb->secen_override && cb->secen)
349 if (!params.enabled ||
350 (cb->secen_override && !cb->secen) ||
353 if (cb->seclevel_override && !cb->seclevel)
356 level = cb->seclevel_override ? cb->seclevel : params.out_level;
358 hdr->fc.security_enabled = 1;
359 hdr->sec.level = level;
360 hdr->sec.key_id_mode = params.out_key.mode;
361 if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
362 hdr->sec.short_src = params.out_key.short_source;
363 else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
364 hdr->sec.extended_src = params.out_key.extended_source;
365 hdr->sec.key_id = params.out_key.id;
370 static int ieee802154_header_create(struct sk_buff *skb,
371 struct net_device *dev,
372 const struct ieee802154_addr *daddr,
373 const struct ieee802154_addr *saddr,
376 struct ieee802154_hdr hdr;
377 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
378 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
379 struct ieee802154_mac_cb *cb = mac_cb(skb);
385 memset(&hdr.fc, 0, sizeof(hdr.fc));
386 hdr.fc.type = cb->type;
387 hdr.fc.security_enabled = cb->secen;
388 hdr.fc.ack_request = cb->ackreq;
389 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
391 if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
395 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
396 wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
397 wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
398 hdr.source.mode = IEEE802154_ADDR_LONG;
399 hdr.source.extended_addr = wpan_dev->extended_addr;
401 hdr.source.mode = IEEE802154_ADDR_SHORT;
402 hdr.source.short_addr = wpan_dev->short_addr;
405 hdr.source.pan_id = wpan_dev->pan_id;
407 hdr.source = *(const struct ieee802154_addr *)saddr;
410 hdr.dest = *(const struct ieee802154_addr *)daddr;
412 hlen = ieee802154_hdr_push(skb, &hdr);
416 skb_reset_mac_header(skb);
419 if (len > ieee802154_max_payload(&hdr))
425 static const struct wpan_dev_header_ops ieee802154_header_ops = {
426 .create = ieee802154_header_create,
429 /* This header create functionality assumes a 8 byte array for
430 * source and destination pointer at maximum. To adapt this for
431 * the 802.15.4 dataframe header we use extended address handling
432 * here only and intra pan connection. fc fields are mostly fallback
433 * handling. For provide dev_hard_header for dgram sockets.
435 static int mac802154_header_create(struct sk_buff *skb,
436 struct net_device *dev,
442 struct ieee802154_hdr hdr;
443 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
444 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
445 struct ieee802154_mac_cb cb = { };
451 memset(&hdr.fc, 0, sizeof(hdr.fc));
452 hdr.fc.type = IEEE802154_FC_TYPE_DATA;
453 hdr.fc.ack_request = wpan_dev->ackreq;
454 hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF;
456 /* TODO currently a workaround to give zero cb block to set
457 * security parameters defaults according MIB.
459 if (mac802154_set_header_security(sdata, &hdr, &cb) < 0)
462 hdr.dest.pan_id = wpan_dev->pan_id;
463 hdr.dest.mode = IEEE802154_ADDR_LONG;
464 ieee802154_be64_to_le64(&hdr.dest.extended_addr, daddr);
466 hdr.source.pan_id = hdr.dest.pan_id;
467 hdr.source.mode = IEEE802154_ADDR_LONG;
470 hdr.source.extended_addr = wpan_dev->extended_addr;
472 ieee802154_be64_to_le64(&hdr.source.extended_addr, saddr);
474 hlen = ieee802154_hdr_push(skb, &hdr);
478 skb_reset_mac_header(skb);
481 if (len > ieee802154_max_payload(&hdr))
488 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
490 struct ieee802154_hdr hdr;
492 if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
493 pr_debug("malformed packet\n");
497 if (hdr.source.mode == IEEE802154_ADDR_LONG) {
498 ieee802154_le64_to_be64(haddr, &hdr.source.extended_addr);
499 return IEEE802154_EXTENDED_ADDR_LEN;
505 static const struct header_ops mac802154_header_ops = {
506 .create = mac802154_header_create,
507 .parse = mac802154_header_parse,
510 static const struct net_device_ops mac802154_wpan_ops = {
511 .ndo_open = mac802154_wpan_open,
512 .ndo_stop = mac802154_slave_close,
513 .ndo_start_xmit = ieee802154_subif_start_xmit,
514 .ndo_do_ioctl = mac802154_wpan_ioctl,
515 .ndo_set_mac_address = mac802154_wpan_mac_addr,
518 static const struct net_device_ops mac802154_monitor_ops = {
519 .ndo_open = mac802154_wpan_open,
520 .ndo_stop = mac802154_slave_close,
521 .ndo_start_xmit = ieee802154_monitor_start_xmit,
524 static void mac802154_wpan_free(struct net_device *dev)
526 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
528 mac802154_llsec_destroy(&sdata->sec);
533 static void ieee802154_if_setup(struct net_device *dev)
535 dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
536 memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
538 /* Let hard_header_len set to IEEE802154_MIN_HEADER_LEN. AF_PACKET
539 * will not send frames without any payload, but ack frames
540 * has no payload, so substract one that we can send a 3 bytes
541 * frame. The xmit callback assumes at least a hard header where two
542 * bytes fc and sequence field are set.
544 dev->hard_header_len = IEEE802154_MIN_HEADER_LEN - 1;
545 /* The auth_tag header is for security and places in private payload
546 * room of mac frame which stucks between payload and FCS field.
548 dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN +
550 dev->mtu = IEEE802154_MTU;
551 dev->tx_queue_len = 300;
552 dev->flags = IFF_NOARP | IFF_BROADCAST;
556 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
557 enum nl802154_iftype type)
559 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
563 /* set some type-dependent values */
564 sdata->wpan_dev.iftype = type;
566 get_random_bytes(&tmp, sizeof(tmp));
567 atomic_set(&wpan_dev->bsn, tmp);
568 get_random_bytes(&tmp, sizeof(tmp));
569 atomic_set(&wpan_dev->dsn, tmp);
571 /* defaults per 802.15.4-2011 */
572 wpan_dev->min_be = 3;
573 wpan_dev->max_be = 5;
574 wpan_dev->csma_retries = 4;
575 wpan_dev->frame_retries = 3;
577 wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
578 wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
581 case NL802154_IFTYPE_NODE:
582 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
583 sdata->dev->dev_addr);
585 sdata->dev->header_ops = &mac802154_header_ops;
586 sdata->dev->destructor = mac802154_wpan_free;
587 sdata->dev->netdev_ops = &mac802154_wpan_ops;
588 sdata->dev->ml_priv = &mac802154_mlme_wpan;
589 wpan_dev->promiscuous_mode = false;
590 wpan_dev->header_ops = &ieee802154_header_ops;
592 mutex_init(&sdata->sec_mtx);
594 mac802154_llsec_init(&sdata->sec);
595 ret = mac802154_wpan_update_llsec(sdata->dev);
600 case NL802154_IFTYPE_MONITOR:
601 sdata->dev->destructor = free_netdev;
602 sdata->dev->netdev_ops = &mac802154_monitor_ops;
603 wpan_dev->promiscuous_mode = true;
613 ieee802154_if_add(struct ieee802154_local *local, const char *name,
614 unsigned char name_assign_type, enum nl802154_iftype type,
615 __le64 extended_addr)
617 struct net_device *ndev = NULL;
618 struct ieee802154_sub_if_data *sdata = NULL;
623 ndev = alloc_netdev(sizeof(*sdata), name,
624 name_assign_type, ieee802154_if_setup);
626 return ERR_PTR(-ENOMEM);
628 ndev->needed_headroom = local->hw.extra_tx_headroom +
629 IEEE802154_MAX_HEADER_LEN;
631 ret = dev_alloc_name(ndev, ndev->name);
635 ieee802154_le64_to_be64(ndev->perm_addr,
636 &local->hw.phy->perm_extended_addr);
638 case NL802154_IFTYPE_NODE:
639 ndev->type = ARPHRD_IEEE802154;
640 if (ieee802154_is_valid_extended_unicast_addr(extended_addr))
641 ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
643 memcpy(ndev->dev_addr, ndev->perm_addr,
644 IEEE802154_EXTENDED_ADDR_LEN);
646 case NL802154_IFTYPE_MONITOR:
647 ndev->type = ARPHRD_IEEE802154_MONITOR;
654 /* TODO check this */
655 SET_NETDEV_DEV(ndev, &local->phy->dev);
656 sdata = netdev_priv(ndev);
657 ndev->ieee802154_ptr = &sdata->wpan_dev;
658 memcpy(sdata->name, ndev->name, IFNAMSIZ);
660 sdata->wpan_dev.wpan_phy = local->hw.phy;
661 sdata->local = local;
663 /* setup type-dependent data */
664 ret = ieee802154_setup_sdata(sdata, type);
668 ret = register_netdevice(ndev);
672 mutex_lock(&local->iflist_mtx);
673 list_add_tail_rcu(&sdata->list, &local->interfaces);
674 mutex_unlock(&local->iflist_mtx);
683 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
687 mutex_lock(&sdata->local->iflist_mtx);
688 list_del_rcu(&sdata->list);
689 mutex_unlock(&sdata->local->iflist_mtx);
692 unregister_netdevice(sdata->dev);
695 void ieee802154_remove_interfaces(struct ieee802154_local *local)
697 struct ieee802154_sub_if_data *sdata, *tmp;
699 mutex_lock(&local->iflist_mtx);
700 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
701 list_del(&sdata->list);
703 unregister_netdevice(sdata->dev);
705 mutex_unlock(&local->iflist_mtx);
708 static int netdev_notify(struct notifier_block *nb,
709 unsigned long state, void *ptr)
711 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
712 struct ieee802154_sub_if_data *sdata;
714 if (state != NETDEV_CHANGENAME)
717 if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
720 if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
723 sdata = IEEE802154_DEV_TO_SUB_IF(dev);
724 memcpy(sdata->name, dev->name, IFNAMSIZ);
729 static struct notifier_block mac802154_netdev_notifier = {
730 .notifier_call = netdev_notify,
733 int ieee802154_iface_init(void)
735 return register_netdevice_notifier(&mac802154_netdev_notifier);
738 void ieee802154_iface_exit(void)
740 unregister_netdevice_notifier(&mac802154_netdev_notifier);