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/rtnetlink.h>
26 #include <linux/nl802154.h>
27 #include <net/mac802154.h>
28 #include <net/ieee802154_netdev.h>
29 #include <net/cfg802154.h>
31 #include "ieee802154_i.h"
32 #include "driver-ops.h"
34 static int mac802154_wpan_update_llsec(struct net_device *dev)
36 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
37 struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev);
38 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
42 struct ieee802154_llsec_params params;
45 params.pan_id = wpan_dev->pan_id;
46 changed |= IEEE802154_LLSEC_PARAM_PAN_ID;
48 params.hwaddr = wpan_dev->extended_addr;
49 changed |= IEEE802154_LLSEC_PARAM_HWADDR;
51 rc = ops->llsec->set_params(dev, ¶ms, changed);
58 mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
60 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
61 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
62 struct sockaddr_ieee802154 *sa =
63 (struct sockaddr_ieee802154 *)&ifr->ifr_addr;
64 int err = -ENOIOCTLCMD;
68 spin_lock_bh(&sdata->mib_lock);
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)) {
93 spin_unlock_bh(&sdata->mib_lock);
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);
115 spin_unlock_bh(&sdata->mib_lock);
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 ieee802154_be64_to_le64(&extended_addr, addr->sa_data);
129 if (!ieee802154_is_valid_extended_addr(extended_addr))
132 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
133 sdata->wpan_dev.extended_addr = extended_addr;
135 return mac802154_wpan_update_llsec(dev);
138 static int mac802154_slave_open(struct net_device *dev)
140 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
141 struct ieee802154_sub_if_data *subif;
142 struct ieee802154_local *local = sdata->local;
147 if (sdata->vif.type == IEEE802154_DEV_WPAN) {
148 mutex_lock(&sdata->local->iflist_mtx);
149 list_for_each_entry(subif, &sdata->local->interfaces, list) {
150 if (subif != sdata &&
151 subif->vif.type == sdata->vif.type &&
152 ieee802154_sdata_running(subif)) {
153 mutex_unlock(&sdata->local->iflist_mtx);
157 mutex_unlock(&sdata->local->iflist_mtx);
160 set_bit(SDATA_STATE_RUNNING, &sdata->state);
162 if (!local->open_count) {
163 res = drv_start(local);
170 netif_start_queue(dev);
173 /* might already be clear but that doesn't matter */
174 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
179 static int mac802154_wpan_open(struct net_device *dev)
182 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
183 struct ieee802154_local *local = sdata->local;
184 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
185 struct wpan_phy *phy = sdata->local->phy;
187 rc = mac802154_slave_open(dev);
191 mutex_lock(&phy->pib_lock);
193 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
194 rc = drv_set_promiscuous_mode(local,
195 wpan_dev->promiscuous_mode);
200 if (local->hw.flags & IEEE802154_HW_AFILT) {
201 rc = drv_set_pan_id(local, wpan_dev->pan_id);
205 rc = drv_set_extended_addr(local, wpan_dev->extended_addr);
209 rc = drv_set_short_addr(local, wpan_dev->short_addr);
214 if (local->hw.flags & IEEE802154_HW_LBT) {
215 rc = drv_set_lbt_mode(local, wpan_dev->lbt);
220 if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) {
221 rc = drv_set_csma_params(local, wpan_dev->min_be,
223 wpan_dev->csma_retries);
228 if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) {
229 rc = drv_set_max_frame_retries(local, wpan_dev->frame_retries);
234 mutex_unlock(&phy->pib_lock);
238 mutex_unlock(&phy->pib_lock);
242 static int mac802154_slave_close(struct net_device *dev)
244 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
245 struct ieee802154_local *local = sdata->local;
249 hrtimer_cancel(&local->ifs_timer);
251 netif_stop_queue(dev);
254 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
256 if (!local->open_count)
262 static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata,
263 struct ieee802154_hdr *hdr,
264 const struct ieee802154_mac_cb *cb)
266 struct ieee802154_llsec_params params;
269 mac802154_llsec_get_params(&sdata->sec, ¶ms);
271 if (!params.enabled && cb->secen_override && cb->secen)
273 if (!params.enabled ||
274 (cb->secen_override && !cb->secen) ||
277 if (cb->seclevel_override && !cb->seclevel)
280 level = cb->seclevel_override ? cb->seclevel : params.out_level;
282 hdr->fc.security_enabled = 1;
283 hdr->sec.level = level;
284 hdr->sec.key_id_mode = params.out_key.mode;
285 if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX)
286 hdr->sec.short_src = params.out_key.short_source;
287 else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX)
288 hdr->sec.extended_src = params.out_key.extended_source;
289 hdr->sec.key_id = params.out_key.id;
294 static int mac802154_header_create(struct sk_buff *skb,
295 struct net_device *dev,
301 struct ieee802154_hdr hdr;
302 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
303 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
304 struct ieee802154_mac_cb *cb = mac_cb(skb);
310 memset(&hdr.fc, 0, sizeof(hdr.fc));
311 hdr.fc.type = cb->type;
312 hdr.fc.security_enabled = cb->secen;
313 hdr.fc.ack_request = cb->ackreq;
314 hdr.seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
316 if (mac802154_set_header_security(sdata, &hdr, cb) < 0)
320 spin_lock_bh(&sdata->mib_lock);
322 if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) ||
323 wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) ||
324 wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
325 hdr.source.mode = IEEE802154_ADDR_LONG;
326 hdr.source.extended_addr = wpan_dev->extended_addr;
328 hdr.source.mode = IEEE802154_ADDR_SHORT;
329 hdr.source.short_addr = wpan_dev->short_addr;
332 hdr.source.pan_id = wpan_dev->pan_id;
334 spin_unlock_bh(&sdata->mib_lock);
336 hdr.source = *(const struct ieee802154_addr *)saddr;
339 hdr.dest = *(const struct ieee802154_addr *)daddr;
341 hlen = ieee802154_hdr_push(skb, &hdr);
345 skb_reset_mac_header(skb);
348 if (len > ieee802154_max_payload(&hdr))
355 mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr)
357 struct ieee802154_hdr hdr;
358 struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr;
360 if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) {
361 pr_debug("malformed packet\n");
366 return sizeof(*addr);
369 static struct header_ops mac802154_header_ops = {
370 .create = mac802154_header_create,
371 .parse = mac802154_header_parse,
374 static const struct net_device_ops mac802154_wpan_ops = {
375 .ndo_open = mac802154_wpan_open,
376 .ndo_stop = mac802154_slave_close,
377 .ndo_start_xmit = ieee802154_subif_start_xmit,
378 .ndo_do_ioctl = mac802154_wpan_ioctl,
379 .ndo_set_mac_address = mac802154_wpan_mac_addr,
382 static const struct net_device_ops mac802154_monitor_ops = {
383 .ndo_open = mac802154_wpan_open,
384 .ndo_stop = mac802154_slave_close,
385 .ndo_start_xmit = ieee802154_monitor_start_xmit,
388 static void mac802154_wpan_free(struct net_device *dev)
390 struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
392 mac802154_llsec_destroy(&sdata->sec);
397 static void ieee802154_if_setup(struct net_device *dev)
399 dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN;
400 memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN);
402 dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN;
403 dev->needed_tailroom = 2 + 16; /* FCS + MIC */
404 dev->mtu = IEEE802154_MTU;
405 dev->tx_queue_len = 300;
406 dev->flags = IFF_NOARP | IFF_BROADCAST;
410 ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, int type)
412 struct wpan_dev *wpan_dev = &sdata->wpan_dev;
414 /* set some type-dependent values */
415 sdata->vif.type = type;
416 sdata->wpan_dev.iftype = type;
418 get_random_bytes(&wpan_dev->bsn, 1);
419 get_random_bytes(&wpan_dev->dsn, 1);
421 /* defaults per 802.15.4-2011 */
422 wpan_dev->min_be = 3;
423 wpan_dev->max_be = 5;
424 wpan_dev->csma_retries = 4;
425 /* for compatibility, actual default is 3 */
426 wpan_dev->frame_retries = -1;
428 wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST);
429 wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST);
432 case IEEE802154_DEV_WPAN:
433 ieee802154_be64_to_le64(&wpan_dev->extended_addr,
434 sdata->dev->dev_addr);
436 sdata->dev->header_ops = &mac802154_header_ops;
437 sdata->dev->destructor = mac802154_wpan_free;
438 sdata->dev->netdev_ops = &mac802154_wpan_ops;
439 sdata->dev->ml_priv = &mac802154_mlme_wpan;
440 wpan_dev->promiscuous_mode = false;
442 spin_lock_init(&sdata->mib_lock);
443 mutex_init(&sdata->sec_mtx);
445 mac802154_llsec_init(&sdata->sec);
447 case IEEE802154_DEV_MONITOR:
448 sdata->dev->destructor = free_netdev;
449 sdata->dev->netdev_ops = &mac802154_monitor_ops;
450 wpan_dev->promiscuous_mode = true;
460 ieee802154_if_add(struct ieee802154_local *local, const char *name,
461 struct wpan_dev **new_wpan_dev, int type)
463 struct net_device *ndev = NULL;
464 struct ieee802154_sub_if_data *sdata = NULL;
469 ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size, name,
470 NET_NAME_UNKNOWN, ieee802154_if_setup);
472 return ERR_PTR(-ENOMEM);
474 ndev->needed_headroom = local->hw.extra_tx_headroom;
476 ret = dev_alloc_name(ndev, ndev->name);
481 case IEEE802154_DEV_WPAN:
482 ndev->type = ARPHRD_IEEE802154;
484 case IEEE802154_DEV_MONITOR:
485 ndev->type = ARPHRD_IEEE802154_MONITOR;
492 ieee802154_le64_to_be64(ndev->perm_addr,
493 &local->hw.phy->perm_extended_addr);
494 memcpy(ndev->dev_addr, ndev->perm_addr, IEEE802154_EXTENDED_ADDR_LEN);
495 /* TODO check this */
496 SET_NETDEV_DEV(ndev, &local->phy->dev);
497 sdata = netdev_priv(ndev);
498 ndev->ieee802154_ptr = &sdata->wpan_dev;
499 memcpy(sdata->name, ndev->name, IFNAMSIZ);
501 sdata->wpan_dev.wpan_phy = local->hw.phy;
502 sdata->local = local;
504 /* setup type-dependent data */
505 ret = ieee802154_setup_sdata(sdata, type);
510 ret = register_netdevice(ndev);
515 mutex_lock(&local->iflist_mtx);
516 list_add_tail_rcu(&sdata->list, &local->interfaces);
517 mutex_unlock(&local->iflist_mtx);
520 *new_wpan_dev = &sdata->wpan_dev;
529 void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata)
533 mutex_lock(&sdata->local->iflist_mtx);
534 list_del_rcu(&sdata->list);
535 mutex_unlock(&sdata->local->iflist_mtx);
538 unregister_netdevice(sdata->dev);
541 void ieee802154_remove_interfaces(struct ieee802154_local *local)
543 struct ieee802154_sub_if_data *sdata, *tmp;
545 mutex_lock(&local->iflist_mtx);
546 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
547 list_del(&sdata->list);
549 unregister_netdevice(sdata->dev);
551 mutex_unlock(&local->iflist_mtx);
554 static int netdev_notify(struct notifier_block *nb,
555 unsigned long state, void *ptr)
557 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
558 struct ieee802154_sub_if_data *sdata;
560 if (state != NETDEV_CHANGENAME)
563 if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy)
566 if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid)
569 sdata = IEEE802154_DEV_TO_SUB_IF(dev);
570 memcpy(sdata->name, dev->name, IFNAMSIZ);
575 static struct notifier_block mac802154_netdev_notifier = {
576 .notifier_call = netdev_notify,
579 int ieee802154_iface_init(void)
581 return register_netdevice_notifier(&mac802154_netdev_notifier);
584 void ieee802154_iface_exit(void)
586 unregister_netdevice_notifier(&mac802154_netdev_notifier);