| /* |
| * 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/rtnetlink.h> |
| #include <linux/nl802154.h> |
| #include <net/af_ieee802154.h> |
| #include <net/mac802154.h> |
| #include <net/ieee802154_netdev.h> |
| #include <net/cfg802154.h> |
| |
| #include "ieee802154_i.h" |
| #include "driver-ops.h" |
| |
| static 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); |
| int rc = 0; |
| |
| if (ops->llsec) { |
| struct ieee802154_llsec_params params; |
| int changed = 0; |
| |
| params.pan_id = sdata->pan_id; |
| changed |= IEEE802154_LLSEC_PARAM_PAN_ID; |
| |
| params.hwaddr = sdata->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 sockaddr_ieee802154 *sa = |
| (struct sockaddr_ieee802154 *)&ifr->ifr_addr; |
| int err = -ENOIOCTLCMD; |
| |
| spin_lock_bh(&sdata->mib_lock); |
| |
| switch (cmd) { |
| case SIOCGIFADDR: |
| { |
| u16 pan_id, short_addr; |
| |
| pan_id = le16_to_cpu(sdata->pan_id); |
| short_addr = le16_to_cpu(sdata->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: |
| 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; |
| } |
| |
| sdata->pan_id = cpu_to_le16(sa->addr.pan_id); |
| sdata->short_addr = cpu_to_le16(sa->addr.short_addr); |
| |
| err = mac802154_wpan_update_llsec(dev); |
| break; |
| } |
| |
| spin_unlock_bh(&sdata->mib_lock); |
| return err; |
| } |
| |
| static int mac802154_wpan_mac_addr(struct net_device *dev, void *p) |
| { |
| struct sockaddr *addr = p; |
| |
| if (netif_running(dev)) |
| return -EBUSY; |
| |
| /* FIXME: validate addr */ |
| memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); |
| mac802154_dev_set_ieee_addr(dev); |
| return mac802154_wpan_update_llsec(dev); |
| } |
| |
| int mac802154_set_mac_params(struct net_device *dev, |
| const struct ieee802154_mac_params *params) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| sdata->mac_params = *params; |
| mutex_unlock(&sdata->local->iflist_mtx); |
| |
| return 0; |
| } |
| |
| void mac802154_get_mac_params(struct net_device *dev, |
| struct ieee802154_mac_params *params) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| |
| mutex_lock(&sdata->local->iflist_mtx); |
| *params = sdata->mac_params; |
| mutex_unlock(&sdata->local->iflist_mtx); |
| } |
| |
| static int mac802154_slave_open(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct ieee802154_sub_if_data *subif; |
| struct ieee802154_local *local = sdata->local; |
| int res = 0; |
| |
| ASSERT_RTNL(); |
| |
| if (sdata->type == IEEE802154_DEV_WPAN) { |
| mutex_lock(&sdata->local->iflist_mtx); |
| list_for_each_entry(subif, &sdata->local->interfaces, list) { |
| if (subif != sdata && subif->type == sdata->type && |
| ieee802154_sdata_running(subif)) { |
| mutex_unlock(&sdata->local->iflist_mtx); |
| return -EBUSY; |
| } |
| } |
| mutex_unlock(&sdata->local->iflist_mtx); |
| } |
| |
| set_bit(SDATA_STATE_RUNNING, &sdata->state); |
| |
| if (!local->open_count) { |
| res = drv_start(local); |
| WARN_ON(res); |
| 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 mac802154_wpan_open(struct net_device *dev) |
| { |
| int rc; |
| struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| struct ieee802154_local *local = sdata->local; |
| struct wpan_phy *phy = sdata->local->phy; |
| |
| rc = mac802154_slave_open(dev); |
| if (rc < 0) |
| return rc; |
| |
| mutex_lock(&phy->pib_lock); |
| |
| if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) { |
| rc = drv_set_promiscuous_mode(local, sdata->promisuous_mode); |
| if (rc < 0) |
| goto out; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_TXPOWER) { |
| rc = drv_set_tx_power(local, sdata->mac_params.transmit_power); |
| if (rc < 0) |
| goto out; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_LBT) { |
| rc = drv_set_lbt_mode(local, sdata->mac_params.lbt); |
| if (rc < 0) |
| goto out; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_CCA_MODE) { |
| rc = drv_set_cca_mode(local, sdata->mac_params.cca_mode); |
| if (rc < 0) |
| goto out; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_CCA_ED_LEVEL) { |
| rc = drv_set_cca_ed_level(local, |
| sdata->mac_params.cca_ed_level); |
| if (rc < 0) |
| goto out; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_CSMA_PARAMS) { |
| rc = drv_set_csma_params(local, sdata->mac_params.min_be, |
| sdata->mac_params.max_be, |
| sdata->mac_params.csma_retries); |
| if (rc < 0) |
| goto out; |
| } |
| |
| if (local->hw.flags & IEEE802154_HW_FRAME_RETRIES) { |
| rc = drv_set_max_frame_retries(local, |
| sdata->mac_params.frame_retries); |
| if (rc < 0) |
| goto out; |
| } |
| |
| mutex_unlock(&phy->pib_lock); |
| return 0; |
| |
| out: |
| mutex_unlock(&phy->pib_lock); |
| return rc; |
| } |
| |
| 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) |
| drv_stop(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 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 = ieee802154_mlme_ops(dev)->get_dsn(dev); |
| |
| if (mac802154_set_header_security(sdata, &hdr, cb) < 0) |
| return -EINVAL; |
| |
| if (!saddr) { |
| spin_lock_bh(&sdata->mib_lock); |
| |
| if (sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST) || |
| sdata->short_addr == cpu_to_le16(IEEE802154_ADDR_UNDEF) || |
| sdata->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) { |
| hdr.source.mode = IEEE802154_ADDR_LONG; |
| hdr.source.extended_addr = sdata->extended_addr; |
| } else { |
| hdr.source.mode = IEEE802154_ADDR_SHORT; |
| hdr.source.short_addr = sdata->short_addr; |
| } |
| |
| hdr.source.pan_id = sdata->pan_id; |
| |
| spin_unlock_bh(&sdata->mib_lock); |
| } 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); |
| } |
| |
| void mac802154_wpan_setup(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata; |
| |
| dev->addr_len = IEEE802154_ADDR_LEN; |
| memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN); |
| |
| dev->hard_header_len = MAC802154_FRAME_HARD_HEADER_LEN; |
| dev->header_ops = &mac802154_header_ops; |
| dev->needed_tailroom = 2 + 16; /* FCS + MIC */ |
| dev->mtu = IEEE802154_MTU; |
| dev->tx_queue_len = 300; |
| dev->type = ARPHRD_IEEE802154; |
| dev->flags = IFF_NOARP | IFF_BROADCAST; |
| |
| dev->destructor = mac802154_wpan_free; |
| dev->netdev_ops = &mac802154_wpan_ops; |
| dev->ml_priv = &mac802154_mlme_wpan; |
| |
| sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| sdata->type = IEEE802154_DEV_WPAN; |
| |
| spin_lock_init(&sdata->mib_lock); |
| mutex_init(&sdata->sec_mtx); |
| |
| get_random_bytes(&sdata->bsn, 1); |
| get_random_bytes(&sdata->dsn, 1); |
| |
| /* defaults per 802.15.4-2011 */ |
| sdata->mac_params.min_be = 3; |
| sdata->mac_params.max_be = 5; |
| sdata->mac_params.csma_retries = 4; |
| /* for compatibility, actual default is 3 */ |
| sdata->mac_params.frame_retries = -1; |
| |
| sdata->pan_id = cpu_to_le16(IEEE802154_PANID_BROADCAST); |
| sdata->short_addr = cpu_to_le16(IEEE802154_ADDR_BROADCAST); |
| |
| sdata->promisuous_mode = false; |
| |
| mac802154_llsec_init(&sdata->sec); |
| } |
| |
| void mac802154_monitor_setup(struct net_device *dev) |
| { |
| struct ieee802154_sub_if_data *sdata; |
| |
| dev->needed_tailroom = 2; /* room for FCS */ |
| dev->mtu = IEEE802154_MTU; |
| dev->tx_queue_len = 10; |
| dev->type = ARPHRD_IEEE802154_MONITOR; |
| dev->flags = IFF_NOARP | IFF_BROADCAST; |
| |
| dev->destructor = free_netdev; |
| dev->netdev_ops = &mac802154_monitor_ops; |
| dev->ml_priv = &mac802154_mlme_reduced; |
| |
| sdata = IEEE802154_DEV_TO_SUB_IF(dev); |
| sdata->type = IEEE802154_DEV_MONITOR; |
| |
| sdata->promisuous_mode = true; |
| } |