| /* |
| * Copyright 2007-2012 Siemens AG |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * Written by: |
| * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> |
| * Sergey Lapin <slapin@ossfans.org> |
| * Maxim Gorbachyov <maxim.gorbachev@siemens.com> |
| * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> |
| */ |
| |
| #include <linux/netdevice.h> |
| #include <linux/module.h> |
| #include <linux/if_arp.h> |
| #include <linux/ieee802154.h> |
| |
| #include <net/nl802154.h> |
| #include <net/mac802154.h> |
| #include <net/ieee802154_netdev.h> |
| #include <net/cfg802154.h> |
| |
| #include "ieee802154_i.h" |
| #include "driver-ops.h" |
| |
| int mac802154_wpan_update_llsec(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct ieee802154_mlme_ops *ops = ieee802154_mlme_ops(dev); |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| int rc = 0; |
| |
| if (ops->llsec) { |
| struct ieee802154_llsec_params params; |
| int changed = 0; |
| |
| params.pan_id = wpan_dev->pan_id; |
| changed |= IEEE802154_LLSEC_PARAM_PAN_ID; |
| |
| params.hwaddr = wpan_dev->extended_addr; |
| changed |= IEEE802154_LLSEC_PARAM_HWADDR; |
| |
| rc = ops->llsec->set_params(dev, ¶ms, changed); |
| } |
| |
| return rc; |
| } |
| |
| static int |
| mac802154_wpan_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| struct sockaddr_ieee802154 *sa = |
| (struct sockaddr_ieee802154 *)&ifr->ifr_addr; |
| int err = -ENOIOCTLCMD; |
| |
| if (cmd != SIOCGIFADDR && cmd != SIOCSIFADDR) |
| return err; |
| |
| rtnl_lock(); |
| |
| switch (cmd) { |
| case SIOCGIFADDR: |
| { |
| u16 pan_id, short_addr; |
| |
| pan_id = le16_to_cpu(wpan_dev->pan_id); |
| short_addr = le16_to_cpu(wpan_dev->short_addr); |
| if (pan_id == IEEE802154_PANID_BROADCAST || |
| short_addr == IEEE802154_ADDR_BROADCAST) { |
| err = -EADDRNOTAVAIL; |
| break; |
| } |
| |
| sa->family = AF_IEEE802154; |
| sa->addr.addr_type = IEEE802154_ADDR_SHORT; |
| sa->addr.pan_id = pan_id; |
| sa->addr.short_addr = short_addr; |
| |
| err = 0; |
| break; |
| } |
| case SIOCSIFADDR: |
| if (netif_running(dev)) { |
| rtnl_unlock(); |
| return -EBUSY; |
| } |
| |
| dev_warn(&dev->dev, |
| "Using DEBUGing ioctl SIOCSIFADDR isn't recommended!\n"); |
| if (sa->family != AF_IEEE802154 || |
| sa->addr.addr_type != IEEE802154_ADDR_SHORT || |
| sa->addr.pan_id == IEEE802154_PANID_BROADCAST || |
| sa->addr.short_addr == IEEE802154_ADDR_BROADCAST || |
| sa->addr.short_addr == IEEE802154_ADDR_UNDEF) { |
| err = -EINVAL; |
| break; |
| } |
| |
| wpan_dev->pan_id = cpu_to_le16(sa->addr.pan_id); |
| wpan_dev->short_addr = cpu_to_le16(sa->addr.short_addr); |
| |
| err = mac802154_wpan_update_llsec(dev); |
| break; |
| } |
| |
| rtnl_unlock(); |
| return err; |
| } |
| |
| static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct sockaddr *addr = p; |
| __le64 extended_addr; |
| |
| if (netif_running(dev)) |
| return -EBUSY; |
| |
| /* lowpan need to be down for update |
| * SLAAC address after ifup |
| */ |
| if (sdata->wpan_dev.lowpan_dev) { |
| if (netif_running(sdata->wpan_dev.lowpan_dev)) |
| return -EBUSY; |
| } |
| |
| ieee802154_be64_to_le64(&extended_addr, addr->sa_data); |
| if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) |
| return -EINVAL; |
| |
| memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| sdata->wpan_dev.extended_addr = extended_addr; |
| |
| /* update lowpan interface mac address when |
| * wpan mac has been changed |
| */ |
| if (sdata->wpan_dev.lowpan_dev) |
| memcpy(sdata->wpan_dev.lowpan_dev->dev_addr, dev->dev_addr, |
| dev->addr_len); |
| |
| return mac802154_wpan_update_llsec(dev); |
| } |
| |
| static int ieee802154_setup_hw(struct ieee802154_sub_if_data *sdata) |
| { |
| struct ieee802154_local *local = sdata->local; |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| int ret; |
| |
| if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { |
| ret = drv_set_promiscuous_mode(local, |
| wpan_dev->promiscuous_mode); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_AFILT) { |
| ret = drv_set_pan_id(local, wpan_dev->pan_id); |
| if (ret < 0) |
| return ret; |
| |
| ret = drv_set_extended_addr(local, wpan_dev->extended_addr); |
| if (ret < 0) |
| return ret; |
| |
| ret = drv_set_short_addr(local, wpan_dev->short_addr); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_LBT) { |
| ret = drv_set_lbt_mode(local, wpan_dev->lbt); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { |
| ret = drv_set_csma_params(local, wpan_dev->min_be, |
| wpan_dev->max_be, |
| wpan_dev->csma_retries); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { |
| ret = drv_set_max_frame_retries(local, wpan_dev->frame_retries); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int mac802154_slave_open(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct ieee802154_local *local = sdata->local; |
| int res; |
| |
| ASSERT_RTNL(); |
| |
| set_bit(SDATA_STATE_RUNNING, &sdata->state); |
| |
| if (!local->open_count) { |
| res = ieee802154_setup_hw(sdata); |
| if (res) |
| goto err; |
| |
| res = drv_start(local); |
| if (res) |
| goto err; |
| } |
| |
| local->open_count++; |
| netif_start_queue(dev); |
| return 0; |
| err: |
| /* might already be clear but that doesn't matter */ |
| clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
| |
| return res; |
| } |
| |
| static int |
| ieee802154_check_mac_settings(struct ieee802154_local *local, |
| struct wpan_dev *wpan_dev, |
| struct wpan_dev *nwpan_dev) |
| { |
| ASSERT_RTNL(); |
| |
| if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { |
| if (wpan_dev->promiscuous_mode != nwpan_dev->promiscuous_mode) |
| return -EBUSY; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_AFILT) { |
| if (wpan_dev->pan_id != nwpan_dev->pan_id || |
| wpan_dev->short_addr != nwpan_dev->short_addr || |
| wpan_dev->extended_addr != nwpan_dev->extended_addr) |
| return -EBUSY; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { |
| if (wpan_dev->min_be != nwpan_dev->min_be || |
| wpan_dev->max_be != nwpan_dev->max_be || |
| wpan_dev->csma_retries != nwpan_dev->csma_retries) |
| return -EBUSY; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { |
| if (wpan_dev->frame_retries != nwpan_dev->frame_retries) |
| return -EBUSY; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_LBT) { |
| if (wpan_dev->lbt != nwpan_dev->lbt) |
| return -EBUSY; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| ieee802154_check_concurrent_iface(struct ieee802154_sub_if_data *sdata, |
| enum nl802154_iftype iftype) |
| { |
| struct ieee802154_local *local = sdata->local; |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| struct ieee802154_sub_if_data *nsdata; |
| |
| /* we hold the RTNL here so can safely walk the list */ |
| list_for_each_entry(nsdata, &local->interfaces, list) { |
| if (nsdata != sdata && ieee802154_sdata_running(nsdata)) { |
| int ret; |
| |
| /* TODO currently we don't support multiple node types |
| * we need to run skb_clone at rx path. Check if there |
| * exist really an use case if we need to support |
| * multiple node types at the same time. |
| */ |
| if (wpan_dev->iftype == NL802154_IFTYPE_NODE && |
| nsdata->wpan_dev.iftype == NL802154_IFTYPE_NODE) |
| return -EBUSY; |
| |
| /* check all phy mac sublayer settings are the same. |
| * We have only one phy, different values makes trouble. |
| */ |
| ret = ieee802154_check_mac_settings(local, wpan_dev, |
| &nsdata->wpan_dev); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int mac802154_wpan_open(struct net_device *dev) |
| { |
| int rc; |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| |
| rc = ieee802154_check_concurrent_iface(sdata, wpan_dev->iftype); |
| if (rc < 0) |
| return rc; |
| |
| return mac802154_slave_open(dev); |
| } |
| |
| static int mac802154_slave_close(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct ieee802154_local *local = sdata->local; |
| |
| ASSERT_RTNL(); |
| |
| netif_stop_queue(dev); |
| local->open_count--; |
| |
| clear_bit(SDATA_STATE_RUNNING, &sdata->state); |
| |
| if (!local->open_count) |
| ieee802154_stop_device(local); |
| |
| return 0; |
| } |
| |
| static int mac802154_set_header_security(struct ieee802154_sub_if_data *sdata, |
| struct ieee802154_hdr *hdr, |
| const struct ieee802154_mac_cb *cb) |
| { |
| struct ieee802154_llsec_params params; |
| u8 level; |
| |
| mac802154_llsec_get_params(&sdata->sec, ¶ms); |
| |
| if (!params.enabled && cb->secen_override && cb->secen) |
| return -EINVAL; |
| if (!params.enabled || |
| (cb->secen_override && !cb->secen) || |
| !params.out_level) |
| return 0; |
| if (cb->seclevel_override && !cb->seclevel) |
| return -EINVAL; |
| |
| level = cb->seclevel_override ? cb->seclevel : params.out_level; |
| |
| hdr->fc.security_enabled = 1; |
| hdr->sec.level = level; |
| hdr->sec.key_id_mode = params.out_key.mode; |
| if (params.out_key.mode == IEEE802154_SCF_KEY_SHORT_INDEX) |
| hdr->sec.short_src = params.out_key.short_source; |
| else if (params.out_key.mode == IEEE802154_SCF_KEY_HW_INDEX) |
| hdr->sec.extended_src = params.out_key.extended_source; |
| hdr->sec.key_id = params.out_key.id; |
| |
| return 0; |
| } |
| |
| static int mac802154_header_create(struct sk_buff *skb, |
| struct net_device *dev, |
| unsigned short type, |
| const void *daddr, |
| const void *saddr, |
| unsigned len) |
| { |
| struct ieee802154_hdr hdr; |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| struct ieee802154_mac_cb *cb = mac_cb(skb); |
| int hlen; |
| |
| if (!daddr) |
| return -EINVAL; |
| |
| memset(&hdr.fc, 0, sizeof(hdr.fc)); |
| hdr.fc.type = cb->type; |
| hdr.fc.security_enabled = cb->secen; |
| hdr.fc.ack_request = cb->ackreq; |
| hdr.seq = atomic_inc_return(&dev->ieee802154_ptr->dsn) & 0xFF; |
| |
| if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
| return -EINVAL; |
| |
| if (!saddr) { |
| if (wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
| wpan_dev->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || |
| wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { |
| hdr.source.mode = IEEE802154_ADDR_LONG; |
| hdr.source.extended_addr = wpan_dev->extended_addr; |
| } else { |
| hdr.source.mode = IEEE802154_ADDR_SHORT; |
| hdr.source.short_addr = wpan_dev->short_addr; |
| } |
| |
| hdr.source.pan_id = wpan_dev->pan_id; |
| } else { |
| hdr.source = *(const struct ieee802154_addr *)saddr; |
| } |
| |
| hdr.dest = *(const struct ieee802154_addr *)daddr; |
| |
| hlen = ieee802154_hdr_push(skb, &hdr); |
| if (hlen < 0) |
| return -EINVAL; |
| |
| skb_reset_mac_header(skb); |
| skb->mac_len = hlen; |
| |
| if (len > ieee802154_max_payload(&hdr)) |
| return -EMSGSIZE; |
| |
| return hlen; |
| } |
| |
| static int |
| mac802154_header_parse(const struct sk_buff *skb, unsigned char *haddr) |
| { |
| struct ieee802154_hdr hdr; |
| struct ieee802154_addr *addr = (struct ieee802154_addr *)haddr; |
| |
| if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0) { |
| pr_debug("malformed packet\n"); |
| return 0; |
| } |
| |
| *addr = hdr.source; |
| return sizeof(*addr); |
| } |
| |
| static struct header_ops mac802154_header_ops = { |
| .create = mac802154_header_create, |
| .parse = mac802154_header_parse, |
| }; |
| |
| static const struct net_device_ops mac802154_wpan_ops = { |
| .ndo_open = mac802154_wpan_open, |
| .ndo_stop = mac802154_slave_close, |
| .ndo_start_xmit = ieee802154_subif_start_xmit, |
| .ndo_do_ioctl = mac802154_wpan_ioctl, |
| .ndo_set_mac_address = mac802154_wpan_mac_addr, |
| }; |
| |
| static const struct net_device_ops mac802154_monitor_ops = { |
| .ndo_open = mac802154_wpan_open, |
| .ndo_stop = mac802154_slave_close, |
| .ndo_start_xmit = ieee802154_monitor_start_xmit, |
| }; |
| |
| static void mac802154_wpan_free(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| |
| mac802154_llsec_destroy(&sdata->sec); |
| |
| free_netdev(dev); |
| } |
| |
| static void ieee802154_if_setup(struct net_device *dev) |
| { |
| dev->addr_len = IEEE802154_EXTENDED_ADDR_LEN; |
| memset(dev->broadcast, 0xff, IEEE802154_EXTENDED_ADDR_LEN); |
| |
| dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; |
| dev->needed_tailroom = 2 + 16; /* FCS + MIC */ |
| dev->mtu = IEEE802154_MTU; |
| dev->tx_queue_len = 300; |
| dev->flags = IFF_NOARP | IFF_BROADCAST; |
| } |
| |
| static int |
| ieee802154_setup_sdata(struct ieee802154_sub_if_data *sdata, |
| enum nl802154_iftype type) |
| { |
| struct wpan_dev *wpan_dev = &sdata->wpan_dev; |
| int ret; |
| u8 tmp; |
| |
| /* set some type-dependent values */ |
| sdata->wpan_dev.iftype = type; |
| |
| get_random_bytes(&tmp, sizeof(tmp)); |
| atomic_set(&wpan_dev->bsn, tmp); |
| get_random_bytes(&tmp, sizeof(tmp)); |
| atomic_set(&wpan_dev->dsn, tmp); |
| |
| /* defaults per 802.15.4-2011 */ |
| wpan_dev->min_be = 3; |
| wpan_dev->max_be = 5; |
| wpan_dev->csma_retries = 4; |
| /* for compatibility, actual default is 3 */ |
| wpan_dev->frame_retries = -1; |
| |
| wpan_dev->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
| wpan_dev->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); |
| |
| switch (type) { |
| case NL802154_IFTYPE_NODE: |
| ieee802154_be64_to_le64(&wpan_dev->extended_addr, |
| sdata->dev->dev_addr); |
| |
| sdata->dev->header_ops = &mac802154_header_ops; |
| sdata->dev->destructor = mac802154_wpan_free; |
| sdata->dev->netdev_ops = &mac802154_wpan_ops; |
| sdata->dev->ml_priv = &mac802154_mlme_wpan; |
| wpan_dev->promiscuous_mode = false; |
| |
| mutex_init(&sdata->sec_mtx); |
| |
| mac802154_llsec_init(&sdata->sec); |
| ret = mac802154_wpan_update_llsec(sdata->dev); |
| if (ret < 0) |
| return ret; |
| |
| break; |
| case NL802154_IFTYPE_MONITOR: |
| sdata->dev->destructor = free_netdev; |
| sdata->dev->netdev_ops = &mac802154_monitor_ops; |
| wpan_dev->promiscuous_mode = true; |
| break; |
| default: |
| BUG(); |
| } |
| |
| return 0; |
| } |
| |
| struct net_device * |
| ieee802154_if_add(struct ieee802154_local *local, const char *name, |
| unsigned char name_assign_type, enum nl802154_iftype type, |
| __le64 extended_addr) |
| { |
| struct net_device *ndev = NULL; |
| struct ieee802154_sub_if_data *sdata = NULL; |
| int ret = -ENOMEM; |
| |
| ASSERT_RTNL(); |
| |
| ndev = alloc_netdev(sizeof(*sdata), name, |
| name_assign_type, ieee802154_if_setup); |
| if (!ndev) |
| return ERR_PTR(-ENOMEM); |
| |
| ndev->needed_headroom = local->hw.extra_tx_headroom; |
| |
| ret = dev_alloc_name(ndev, ndev->name); |
| if (ret < 0) |
| goto err; |
| |
| ieee802154_le64_to_be64(ndev->perm_addr, |
| &local->hw.phy->perm_extended_addr); |
| switch (type) { |
| case NL802154_IFTYPE_NODE: |
| ndev->type = ARPHRD_IEEE802154; |
| if (ieee802154_is_valid_extended_unicast_addr(extended_addr)) |
| ieee802154_le64_to_be64(ndev->dev_addr, &extended_addr); |
| else |
| memcpy(ndev->dev_addr, ndev->perm_addr, |
| IEEE802154_EXTENDED_ADDR_LEN); |
| break; |
| case NL802154_IFTYPE_MONITOR: |
| ndev->type = ARPHRD_IEEE802154_MONITOR; |
| break; |
| default: |
| ret = -EINVAL; |
| goto err; |
| } |
| |
| /* TODO check this */ |
| SET_NETDEV_DEV(ndev, &local->phy->dev); |
| sdata = netdev_priv(ndev); |
| ndev->ieee802154_ptr = &sdata->wpan_dev; |
| memcpy(sdata->name, ndev->name, IFNAMSIZ); |
| sdata->dev = ndev; |
| sdata->wpan_dev.wpan_phy = local->hw.phy; |
| sdata->local = local; |
| |
| /* setup type-dependent data */ |
| ret = ieee802154_setup_sdata(sdata, type); |
| if (ret) |
| goto err; |
| |
| ret = register_netdevice(ndev); |
| if (ret < 0) |
| goto err; |
| |
| mutex_lock(&local->iflist_mtx); |
| list_add_tail_rcu(&sdata->list, &local->interfaces); |
| mutex_unlock(&local->iflist_mtx); |
| |
| return ndev; |
| |
| err: |
| free_netdev(ndev); |
| return ERR_PTR(ret); |
| } |
| |
| void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata) |
| { |
| ASSERT_RTNL(); |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| list_del_rcu(&sdata->list); |
| mutex_unlock(&sdata->local->iflist_mtx); |
| |
| synchronize_rcu(); |
| unregister_netdevice(sdata->dev); |
| } |
| |
| void ieee802154_remove_interfaces(struct ieee802154_local *local) |
| { |
| struct ieee802154_sub_if_data *sdata, *tmp; |
| |
| mutex_lock(&local->iflist_mtx); |
| list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { |
| list_del(&sdata->list); |
| |
| unregister_netdevice(sdata->dev); |
| } |
| mutex_unlock(&local->iflist_mtx); |
| } |
| |
| static int netdev_notify(struct notifier_block *nb, |
| unsigned long state, void *ptr) |
| { |
| struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
| struct ieee802154_sub_if_data *sdata; |
| |
| if (state != NETDEV_CHANGENAME) |
| return NOTIFY_DONE; |
| |
| if (!dev->ieee802154_ptr || !dev->ieee802154_ptr->wpan_phy) |
| return NOTIFY_DONE; |
| |
| if (dev->ieee802154_ptr->wpan_phy->privid != mac802154_wpan_phy_privid) |
| return NOTIFY_DONE; |
| |
| sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| memcpy(sdata->name, dev->name, IFNAMSIZ); |
| |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block mac802154_netdev_notifier = { |
| .notifier_call = netdev_notify, |
| }; |
| |
| int ieee802154_iface_init(void) |
| { |
| return register_netdevice_notifier(&mac802154_netdev_notifier); |
| } |
| |
| void ieee802154_iface_exit(void) |
| { |
| unregister_netdevice_notifier(&mac802154_netdev_notifier); |
| } |