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 static 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;
67 spin_lock_bh(&sdata->mib_lock);
72 u16 pan_id, short_addr;
74 pan_id = le16_to_cpu(wpan_dev->pan_id);
75 short_addr = le16_to_cpu(wpan_dev->short_addr);
76 if (pan_id == IEEE802154_PANID_BROADCAST ||
77 short_addr == IEEE802154_ADDR_BROADCAST) {
82 sa->family = AF_IEEE802154;
83 sa->addr.addr_type = IEEE802154_ADDR_SHORT;
84 sa->addr.pan_id = pan_id;
85 sa->addr.short_addr = short_addr;
91 if (netif_running(dev)) {
92 spin_unlock_bh(&sdata->mib_lock);
97 "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n");
98 if (sa->family != AF_IEEE802154 ||
99 sa->addr.addr_type != IEEE802154_ADDR_SHORT ||
100 sa->addr.pan_id == IEEE802154_PANID_BROADCAST ||
101 sa->addr.short_addr == IEEE802154_ADDR_BROADCAST ||
102 sa->addr.short_addr == IEEE802154_ADDR_UNDEF) {
107 wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id);
108 wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr);
110 err = mac802154_wpan_update_llsec(dev);
114 spin_unlock_bh(&sdata->mib_lock);
118 static int mac802154_wpan_mac_addr(struct net_device *dev, void *p)
120 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
121 struct sockaddr *addr = p;
122 __le64 extended_addr;
124 if (netif_running(dev))
127 ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
128 if (!ieee802154_is_valid_extended_addr(extended_addr))
131 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
132 sdata->wpan_dev.extended_addr = extended_addr;
134 return mac802154_wpan_update_llsec(dev);
137 static int mac802154_slave_open(struct net_device *dev)
139 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
140 struct ieee802154_local *local = sdata->local;
145 set_bit(SDATA_STATE_RUNNING, &sdata->state);
147 if (!local->open_count) {
148 res = drv_start(local);
155 netif_start_queue(dev);
158 /* might already be clear but that doesn't matter */
159 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
165 ieee802154_check_mac_settings(struct ieee802154_local *local,
166 struct wpan_dev *wpan_dev,
167 struct wpan_dev *nwpan_dev)
171 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
172 if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode)
176 if (local->hw.flags & IEEE802154_HW_AFILT) {
177 if (wpan_dev->pan_id != nwpan_dev->pan_id)
180 if (wpan_dev->short_addr != nwpan_dev->short_addr)
183 if (wpan_dev->extended_addr != nwpan_dev->extended_addr)
187 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
188 if (wpan_dev->min_be != nwpan_dev->min_be)
191 if (wpan_dev->max_be != nwpan_dev->max_be)
194 if (wpan_dev->csma_retries != nwpan_dev->csma_retries)
198 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
199 if (wpan_dev->frame_retries != nwpan_dev->frame_retries)
203 if (local->hw.flags & IEEE802154_HW_LBT) {
204 if (wpan_dev->lbt != nwpan_dev->lbt)
212 ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata,
213 enum nl802154_iftype iftype)
215 struct ieee802154_local *local = sdata->local;
216 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
217 struct ieee802154_sub_if_data *nsdata;
219 /* we hold the RTNL here so can safely walk the list */
220 list_for_each_entry(nsdata, &local->interfaces, list) {
221 if (nsdata != sdata && ieee802154_sdata_running(nsdata)) {
224 /* TODO currently we don't support multiple node types
225 * we need to run skb_clone at rx path. Check if there
226 * exist really an use case if we need to support
227 * multiple node types at the same time.
229 if (sdata->vif.type == NL802154_IFTYPE_NODE &&
230 nsdata->vif.type == NL802154_IFTYPE_NODE)
233 /* check all phy mac sublayer settings are the same.
234 * We have only one phy, different values makes trouble.
236 ret = ieee802154_check_mac_settings(local, wpan_dev,
246 static int mac802154_wpan_open(struct net_device *dev)
249 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
250 struct ieee802154_local *local = sdata->local;
251 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
252 struct wpan_phy *phy = sdata->local->phy;
254 rc = ieee802154_check_concurrent_iface(sdata, sdata->vif.type);
258 rc = mac802154_slave_open(dev);
262 mutex_lock(&phy->pib_lock);
264 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
265 rc = drv_set_promiscuous_mode(local,
266 wpan_dev->promiscuous_mode);
271 if (local->hw.flags & IEEE802154_HW_AFILT) {
272 rc = drv_set_pan_id(local, wpan_dev->pan_id);
276 rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
280 rc = drv_set_short_addr(local, wpan_dev->short_addr);
285 if (local->hw.flags & IEEE802154_HW_LBT) {
286 rc = drv_set_lbt_mode(local, wpan_dev->lbt);
291 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
292 rc = drv_set_csma_params(local, wpan_dev->min_be,
294 wpan_dev->csma_retries);
299 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
300 rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
305 mutex_unlock(&phy->pib_lock);
309 mutex_unlock(&phy->pib_lock);
313 static int mac802154_slave_close(struct net_device *dev)
315 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
316 struct ieee802154_local *local = sdata->local;
320 hrtimer_cancel(&local->ifs_timer);
322 netif_stop_queue(dev);
325 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
327 if (!local->open_count)
333 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
334 struct ieee802154_hdr *hdr,
335 const struct ieee802154_mac_cb *cb)
337 struct ieee802154_llsec_params params;
340 mac802154_llsec_get_params(&sdata->sec, ¶ms);
342 if (!params.enabled && cb->secen_override && cb->secen)
344 if (!params.enabled ||
345 (cb->secen_override && !cb->secen) ||
348 if (cb->seclevel_override && !cb->seclevel)
351 level = cb->seclevel_override ? cb->seclevel : params.out_level;
353 hdr->fc.security_enabled = 1;
354 hdr->sec.level = level;
355 hdr->sec.key_id_mode = params.out_key.mode;
356 if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
357 hdr->sec.short_src = params.out_key.short_source;
358 else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
359 hdr->sec.extended_src = params.out_key.extended_source;
360 hdr->sec.key_id = params.out_key.id;
365 static int mac802154_header_create(struct sk_buff *skb,
366 struct net_device *dev,
372 struct ieee802154_hdr hdr;
373 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
374 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
375 struct ieee802154_mac_cb *cb = mac_cb(skb);
381 memset(&hdr.fc, 0, sizeof(hdr.fc));
382 hdr.fc.type = cb->type;
383 hdr.fc.security_enabled = cb->secen;
384 hdr.fc.ack_request = cb->ackreq;
385 hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
387 if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
391 spin_lock_bh(&sdata->mib_lock);
393 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
394 wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
395 wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
396 hdr.source.mode = IEEE802154_ADDR_LONG;
397 hdr.source.extended_addr = wpan_dev->extended_addr;
399 hdr.source.mode = IEEE802154_ADDR_SHORT;
400 hdr.source.short_addr = wpan_dev->short_addr;
403 hdr.source.pan_id = wpan_dev->pan_id;
405 spin_unlock_bh(&sdata->mib_lock);
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))
426 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
428 struct ieee802154_hdr hdr;
429 struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;
431 if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
432 pr_debug("malformed packet\n");
437 return sizeof(*addr);
440 static struct header_ops mac802154_header_ops = {
441 .create = mac802154_header_create,
442 .parse = mac802154_header_parse,
445 static const struct net_device_ops mac802154_wpan_ops = {
446 .ndo_open = mac802154_wpan_open,
447 .ndo_stop = mac802154_slave_close,
448 .ndo_start_xmit = ieee802154_subif_start_xmit,
449 .ndo_do_ioctl = mac802154_wpan_ioctl,
450 .ndo_set_mac_address = mac802154_wpan_mac_addr,
453 static const struct net_device_ops mac802154_monitor_ops = {
454 .ndo_open = mac802154_wpan_open,
455 .ndo_stop = mac802154_slave_close,
456 .ndo_start_xmit = ieee802154_monitor_start_xmit,
459 static void mac802154_wpan_free(struct net_device *dev)
461 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
463 mac802154_llsec_destroy(&sdata->sec);
468 static void ieee802154_if_setup(struct net_device *dev)
470 dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
471 memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
473 dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
474 dev->needed_tailroom = 2 + 16; /* FCS + MIC */
475 dev->mtu = IEEE802154_MTU;
476 dev->tx_queue_len = 300;
477 dev->flags = IFF_NOARP | IFF_BROADCAST;
481 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata,
482 enum nl802154_iftype type)
484 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
486 /* set some type-dependent values */
487 sdata->vif.type = type;
488 sdata->wpan_dev.iftype = type;
490 get_random_bytes(&wpan_dev->bsn, 1);
491 get_random_bytes(&wpan_dev->dsn, 1);
493 /* defaults per 802.15.4-2011 */
494 wpan_dev->min_be = 3;
495 wpan_dev->max_be = 5;
496 wpan_dev->csma_retries = 4;
497 /* for compatibility, actual default is 3 */
498 wpan_dev->frame_retries = -1;
500 wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
501 wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
504 case NL802154_IFTYPE_NODE:
505 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
506 sdata->dev->dev_addr);
508 sdata->dev->header_ops = &mac802154_header_ops;
509 sdata->dev->destructor = mac802154_wpan_free;
510 sdata->dev->netdev_ops = &mac802154_wpan_ops;
511 sdata->dev->ml_priv = &mac802154_mlme_wpan;
512 wpan_dev->promiscuous_mode = false;
514 spin_lock_init(&sdata->mib_lock);
515 mutex_init(&sdata->sec_mtx);
517 mac802154_llsec_init(&sdata->sec);
519 case NL802154_IFTYPE_MONITOR:
520 sdata->dev->destructor = free_netdev;
521 sdata->dev->netdev_ops = &mac802154_monitor_ops;
522 wpan_dev->promiscuous_mode = true;
532 ieee802154_if_add(struct ieee802154_local *local, const char *name,
533 enum nl802154_iftype type, __le64 extended_addr)
535 struct net_device *ndev = NULL;
536 struct ieee802154_sub_if_data *sdata = NULL;
541 ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
542 NET_NAME_UNKNOWN, ieee802154_if_setup);
544 return ERR_PTR(-ENOMEM);
546 ndev->needed_headroom = local->hw.extra_tx_headroom;
548 ret = dev_alloc_name(ndev, ndev->name);
552 ieee802154_le64_to_be64(ndev->perm_addr,
553 &local->hw.phy->perm_extended_addr);
555 case NL802154_IFTYPE_NODE:
556 ndev->type = ARPHRD_IEEE802154;
557 if (ieee802154_is_valid_extended_addr(extended_addr))
558 ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr);
560 memcpy(ndev->dev_addr, ndev->perm_addr,
561 IEEE802154_EXTENDED_ADDR_LEN);
563 case NL802154_IFTYPE_MONITOR:
564 ndev->type = ARPHRD_IEEE802154_MONITOR;
571 /* TODO check this */
572 SET_NETDEV_DEV(ndev, &local->phy->dev);
573 sdata = netdev_priv(ndev);
574 ndev->ieee802154_ptr = &sdata->wpan_dev;
575 memcpy(sdata->name, ndev->name, IFNAMSIZ);
577 sdata->wpan_dev.wpan_phy = local->hw.phy;
578 sdata->local = local;
580 /* setup type-dependent data */
581 ret = ieee802154_setup_sdata(sdata, type);
585 ret = register_netdevice(ndev);
589 mutex_lock(&local->iflist_mtx);
590 list_add_tail_rcu(&sdata->list, &local->interfaces);
591 mutex_unlock(&local->iflist_mtx);
600 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
604 mutex_lock(&sdata->local->iflist_mtx);
605 list_del_rcu(&sdata->list);
606 mutex_unlock(&sdata->local->iflist_mtx);
609 unregister_netdevice(sdata->dev);
612 void ieee802154_remove_interfaces(struct ieee802154_local *local)
614 struct ieee802154_sub_if_data *sdata, *tmp;
616 mutex_lock(&local->iflist_mtx);
617 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
618 list_del(&sdata->list);
620 unregister_netdevice(sdata->dev);
622 mutex_unlock(&local->iflist_mtx);
625 static int netdev_notify(struct notifier_block *nb,
626 unsigned long state, void *ptr)
628 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
629 struct ieee802154_sub_if_data *sdata;
631 if (state != NETDEV_CHANGENAME)
634 if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
637 if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
640 sdata = IEEE802154_DEV_TO_SUB_IF(dev);
641 memcpy(sdata->name, dev->name, IFNAMSIZ);
646 static struct notifier_block mac802154_netdev_notifier = {
647 .notifier_call = netdev_notify,
650 int ieee802154_iface_init(void)
652 return register_netdevice_notifier(&mac802154_netdev_notifier);
655 void ieee802154_iface_exit(void)
657 unregister_netdevice_notifier(&mac802154_netdev_notifier);