| /* |
| * mac80211 configuration hooks for cfg80211 |
| * |
| * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net> |
| * |
| * This file is GPLv2 as found in COPYING. |
| */ |
| |
| #include <linux/ieee80211.h> |
| #include <linux/nl80211.h> |
| #include <linux/rtnetlink.h> |
| #include <net/net_namespace.h> |
| #include <linux/rcupdate.h> |
| #include <net/cfg80211.h> |
| #include "ieee80211_i.h" |
| #include "cfg.h" |
| #include "ieee80211_rate.h" |
| |
| static enum ieee80211_if_types |
| nl80211_type_to_mac80211_type(enum nl80211_iftype type) |
| { |
| switch (type) { |
| case NL80211_IFTYPE_UNSPECIFIED: |
| return IEEE80211_IF_TYPE_STA; |
| case NL80211_IFTYPE_ADHOC: |
| return IEEE80211_IF_TYPE_IBSS; |
| case NL80211_IFTYPE_STATION: |
| return IEEE80211_IF_TYPE_STA; |
| case NL80211_IFTYPE_MONITOR: |
| return IEEE80211_IF_TYPE_MNTR; |
| default: |
| return IEEE80211_IF_TYPE_INVALID; |
| } |
| } |
| |
| static int ieee80211_add_iface(struct wiphy *wiphy, char *name, |
| enum nl80211_iftype type) |
| { |
| struct ieee80211_local *local = wiphy_priv(wiphy); |
| enum ieee80211_if_types itype; |
| |
| if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) |
| return -ENODEV; |
| |
| itype = nl80211_type_to_mac80211_type(type); |
| if (itype == IEEE80211_IF_TYPE_INVALID) |
| return -EINVAL; |
| |
| return ieee80211_if_add(local->mdev, name, NULL, itype); |
| } |
| |
| static int ieee80211_del_iface(struct wiphy *wiphy, int ifindex) |
| { |
| struct ieee80211_local *local = wiphy_priv(wiphy); |
| struct net_device *dev; |
| char *name; |
| |
| if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) |
| return -ENODEV; |
| |
| /* we're under RTNL */ |
| dev = __dev_get_by_index(&init_net, ifindex); |
| if (!dev) |
| return 0; |
| |
| name = dev->name; |
| |
| return ieee80211_if_remove(local->mdev, name, -1); |
| } |
| |
| static int ieee80211_change_iface(struct wiphy *wiphy, int ifindex, |
| enum nl80211_iftype type) |
| { |
| struct ieee80211_local *local = wiphy_priv(wiphy); |
| struct net_device *dev; |
| enum ieee80211_if_types itype; |
| struct ieee80211_sub_if_data *sdata; |
| |
| if (unlikely(local->reg_state != IEEE80211_DEV_REGISTERED)) |
| return -ENODEV; |
| |
| /* we're under RTNL */ |
| dev = __dev_get_by_index(&init_net, ifindex); |
| if (!dev) |
| return -ENODEV; |
| |
| if (netif_running(dev)) |
| return -EBUSY; |
| |
| itype = nl80211_type_to_mac80211_type(type); |
| if (itype == IEEE80211_IF_TYPE_INVALID) |
| return -EINVAL; |
| |
| sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| |
| if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN) |
| return -EOPNOTSUPP; |
| |
| ieee80211_if_reinit(dev); |
| ieee80211_if_set_type(dev, itype); |
| |
| return 0; |
| } |
| |
| static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev, |
| u8 key_idx, u8 *mac_addr, |
| struct key_params *params) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| struct sta_info *sta = NULL; |
| enum ieee80211_key_alg alg; |
| int ret; |
| |
| sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| |
| switch (params->cipher) { |
| case WLAN_CIPHER_SUITE_WEP40: |
| case WLAN_CIPHER_SUITE_WEP104: |
| alg = ALG_WEP; |
| break; |
| case WLAN_CIPHER_SUITE_TKIP: |
| alg = ALG_TKIP; |
| break; |
| case WLAN_CIPHER_SUITE_CCMP: |
| alg = ALG_CCMP; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (mac_addr) { |
| sta = sta_info_get(sdata->local, mac_addr); |
| if (!sta) |
| return -ENOENT; |
| } |
| |
| ret = 0; |
| if (!ieee80211_key_alloc(sdata, sta, alg, key_idx, |
| params->key_len, params->key)) |
| ret = -ENOMEM; |
| |
| if (sta) |
| sta_info_put(sta); |
| |
| return ret; |
| } |
| |
| static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev, |
| u8 key_idx, u8 *mac_addr) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| struct sta_info *sta; |
| int ret; |
| |
| sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| |
| if (mac_addr) { |
| sta = sta_info_get(sdata->local, mac_addr); |
| if (!sta) |
| return -ENOENT; |
| |
| ret = 0; |
| if (sta->key) |
| ieee80211_key_free(sta->key); |
| else |
| ret = -ENOENT; |
| |
| sta_info_put(sta); |
| return ret; |
| } |
| |
| if (!sdata->keys[key_idx]) |
| return -ENOENT; |
| |
| ieee80211_key_free(sdata->keys[key_idx]); |
| |
| return 0; |
| } |
| |
| static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev, |
| u8 key_idx, u8 *mac_addr, void *cookie, |
| void (*callback)(void *cookie, |
| struct key_params *params)) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct sta_info *sta = NULL; |
| u8 seq[6] = {0}; |
| struct key_params params; |
| struct ieee80211_key *key; |
| u32 iv32; |
| u16 iv16; |
| int err = -ENOENT; |
| |
| if (mac_addr) { |
| sta = sta_info_get(sdata->local, mac_addr); |
| if (!sta) |
| goto out; |
| |
| key = sta->key; |
| } else |
| key = sdata->keys[key_idx]; |
| |
| if (!key) |
| goto out; |
| |
| memset(¶ms, 0, sizeof(params)); |
| |
| switch (key->conf.alg) { |
| case ALG_TKIP: |
| params.cipher = WLAN_CIPHER_SUITE_TKIP; |
| |
| iv32 = key->u.tkip.iv32; |
| iv16 = key->u.tkip.iv16; |
| |
| if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE && |
| sdata->local->ops->get_tkip_seq) |
| sdata->local->ops->get_tkip_seq( |
| local_to_hw(sdata->local), |
| key->conf.hw_key_idx, |
| &iv32, &iv16); |
| |
| seq[0] = iv16 & 0xff; |
| seq[1] = (iv16 >> 8) & 0xff; |
| seq[2] = iv32 & 0xff; |
| seq[3] = (iv32 >> 8) & 0xff; |
| seq[4] = (iv32 >> 16) & 0xff; |
| seq[5] = (iv32 >> 24) & 0xff; |
| params.seq = seq; |
| params.seq_len = 6; |
| break; |
| case ALG_CCMP: |
| params.cipher = WLAN_CIPHER_SUITE_CCMP; |
| seq[0] = key->u.ccmp.tx_pn[5]; |
| seq[1] = key->u.ccmp.tx_pn[4]; |
| seq[2] = key->u.ccmp.tx_pn[3]; |
| seq[3] = key->u.ccmp.tx_pn[2]; |
| seq[4] = key->u.ccmp.tx_pn[1]; |
| seq[5] = key->u.ccmp.tx_pn[0]; |
| params.seq = seq; |
| params.seq_len = 6; |
| break; |
| case ALG_WEP: |
| if (key->conf.keylen == 5) |
| params.cipher = WLAN_CIPHER_SUITE_WEP40; |
| else |
| params.cipher = WLAN_CIPHER_SUITE_WEP104; |
| break; |
| } |
| |
| params.key = key->conf.key; |
| params.key_len = key->conf.keylen; |
| |
| callback(cookie, ¶ms); |
| err = 0; |
| |
| out: |
| if (sta) |
| sta_info_put(sta); |
| return err; |
| } |
| |
| static int ieee80211_config_default_key(struct wiphy *wiphy, |
| struct net_device *dev, |
| u8 key_idx) |
| { |
| struct ieee80211_sub_if_data *sdata; |
| |
| sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| ieee80211_set_default_key(sdata, key_idx); |
| |
| return 0; |
| } |
| |
| static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev, |
| u8 *mac, struct station_stats *stats) |
| { |
| struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| struct sta_info *sta; |
| |
| sta = sta_info_get(local, mac); |
| if (!sta) |
| return -ENOENT; |
| |
| /* XXX: verify sta->dev == dev */ |
| |
| stats->filled = STATION_STAT_INACTIVE_TIME | |
| STATION_STAT_RX_BYTES | |
| STATION_STAT_TX_BYTES; |
| |
| stats->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx); |
| stats->rx_bytes = sta->rx_bytes; |
| stats->tx_bytes = sta->tx_bytes; |
| |
| sta_info_put(sta); |
| |
| return 0; |
| } |
| |
| /* |
| * This handles both adding a beacon and setting new beacon info |
| */ |
| static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata, |
| struct beacon_parameters *params) |
| { |
| struct beacon_data *new, *old; |
| int new_head_len, new_tail_len; |
| int size; |
| int err = -EINVAL; |
| |
| old = sdata->u.ap.beacon; |
| |
| /* head must not be zero-length */ |
| if (params->head && !params->head_len) |
| return -EINVAL; |
| |
| /* |
| * This is a kludge. beacon interval should really be part |
| * of the beacon information. |
| */ |
| if (params->interval) { |
| sdata->local->hw.conf.beacon_int = params->interval; |
| if (ieee80211_hw_config(sdata->local)) |
| return -EINVAL; |
| /* |
| * We updated some parameter so if below bails out |
| * it's not an error. |
| */ |
| err = 0; |
| } |
| |
| /* Need to have a beacon head if we don't have one yet */ |
| if (!params->head && !old) |
| return err; |
| |
| /* sorry, no way to start beaconing without dtim period */ |
| if (!params->dtim_period && !old) |
| return err; |
| |
| /* new or old head? */ |
| if (params->head) |
| new_head_len = params->head_len; |
| else |
| new_head_len = old->head_len; |
| |
| /* new or old tail? */ |
| if (params->tail || !old) |
| /* params->tail_len will be zero for !params->tail */ |
| new_tail_len = params->tail_len; |
| else |
| new_tail_len = old->tail_len; |
| |
| size = sizeof(*new) + new_head_len + new_tail_len; |
| |
| new = kzalloc(size, GFP_KERNEL); |
| if (!new) |
| return -ENOMEM; |
| |
| /* start filling the new info now */ |
| |
| /* new or old dtim period? */ |
| if (params->dtim_period) |
| new->dtim_period = params->dtim_period; |
| else |
| new->dtim_period = old->dtim_period; |
| |
| /* |
| * pointers go into the block we allocated, |
| * memory is | beacon_data | head | tail | |
| */ |
| new->head = ((u8 *) new) + sizeof(*new); |
| new->tail = new->head + new_head_len; |
| new->head_len = new_head_len; |
| new->tail_len = new_tail_len; |
| |
| /* copy in head */ |
| if (params->head) |
| memcpy(new->head, params->head, new_head_len); |
| else |
| memcpy(new->head, old->head, new_head_len); |
| |
| /* copy in optional tail */ |
| if (params->tail) |
| memcpy(new->tail, params->tail, new_tail_len); |
| else |
| if (old) |
| memcpy(new->tail, old->tail, new_tail_len); |
| |
| rcu_assign_pointer(sdata->u.ap.beacon, new); |
| |
| synchronize_rcu(); |
| |
| kfree(old); |
| |
| return ieee80211_if_config_beacon(sdata->dev); |
| } |
| |
| static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev, |
| struct beacon_parameters *params) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct beacon_data *old; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_AP) |
| return -EINVAL; |
| |
| old = sdata->u.ap.beacon; |
| |
| if (old) |
| return -EALREADY; |
| |
| return ieee80211_config_beacon(sdata, params); |
| } |
| |
| static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev, |
| struct beacon_parameters *params) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct beacon_data *old; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_AP) |
| return -EINVAL; |
| |
| old = sdata->u.ap.beacon; |
| |
| if (!old) |
| return -ENOENT; |
| |
| return ieee80211_config_beacon(sdata, params); |
| } |
| |
| static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev) |
| { |
| struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| struct beacon_data *old; |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_AP) |
| return -EINVAL; |
| |
| old = sdata->u.ap.beacon; |
| |
| if (!old) |
| return -ENOENT; |
| |
| rcu_assign_pointer(sdata->u.ap.beacon, NULL); |
| synchronize_rcu(); |
| kfree(old); |
| |
| return ieee80211_if_config_beacon(dev); |
| } |
| |
| /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */ |
| struct iapp_layer2_update { |
| u8 da[ETH_ALEN]; /* broadcast */ |
| u8 sa[ETH_ALEN]; /* STA addr */ |
| __be16 len; /* 6 */ |
| u8 dsap; /* 0 */ |
| u8 ssap; /* 0 */ |
| u8 control; |
| u8 xid_info[3]; |
| } __attribute__ ((packed)); |
| |
| static void ieee80211_send_layer2_update(struct sta_info *sta) |
| { |
| struct iapp_layer2_update *msg; |
| struct sk_buff *skb; |
| |
| /* Send Level 2 Update Frame to update forwarding tables in layer 2 |
| * bridge devices */ |
| |
| skb = dev_alloc_skb(sizeof(*msg)); |
| if (!skb) |
| return; |
| msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg)); |
| |
| /* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID) |
| * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */ |
| |
| memset(msg->da, 0xff, ETH_ALEN); |
| memcpy(msg->sa, sta->addr, ETH_ALEN); |
| msg->len = htons(6); |
| msg->dsap = 0; |
| msg->ssap = 0x01; /* NULL LSAP, CR Bit: Response */ |
| msg->control = 0xaf; /* XID response lsb.1111F101. |
| * F=0 (no poll command; unsolicited frame) */ |
| msg->xid_info[0] = 0x81; /* XID format identifier */ |
| msg->xid_info[1] = 1; /* LLC types/classes: Type 1 LLC */ |
| msg->xid_info[2] = 0; /* XID sender's receive window size (RW) */ |
| |
| skb->dev = sta->dev; |
| skb->protocol = eth_type_trans(skb, sta->dev); |
| memset(skb->cb, 0, sizeof(skb->cb)); |
| netif_rx(skb); |
| } |
| |
| static void sta_apply_parameters(struct ieee80211_local *local, |
| struct sta_info *sta, |
| struct station_parameters *params) |
| { |
| u32 rates; |
| int i, j; |
| struct ieee80211_supported_band *sband; |
| |
| if (params->station_flags & STATION_FLAG_CHANGED) { |
| sta->flags &= ~WLAN_STA_AUTHORIZED; |
| if (params->station_flags & STATION_FLAG_AUTHORIZED) |
| sta->flags |= WLAN_STA_AUTHORIZED; |
| |
| sta->flags &= ~WLAN_STA_SHORT_PREAMBLE; |
| if (params->station_flags & STATION_FLAG_SHORT_PREAMBLE) |
| sta->flags |= WLAN_STA_SHORT_PREAMBLE; |
| |
| sta->flags &= ~WLAN_STA_WME; |
| if (params->station_flags & STATION_FLAG_WME) |
| sta->flags |= WLAN_STA_WME; |
| } |
| |
| if (params->aid) { |
| sta->aid = params->aid; |
| if (sta->aid > IEEE80211_MAX_AID) |
| sta->aid = 0; /* XXX: should this be an error? */ |
| } |
| |
| if (params->listen_interval >= 0) |
| sta->listen_interval = params->listen_interval; |
| |
| if (params->supported_rates) { |
| rates = 0; |
| sband = local->hw.wiphy->bands[local->oper_channel->band]; |
| |
| for (i = 0; i < params->supported_rates_len; i++) { |
| int rate = (params->supported_rates[i] & 0x7f) * 5; |
| for (j = 0; j < sband->n_bitrates; j++) { |
| if (sband->bitrates[j].bitrate == rate) |
| rates |= BIT(j); |
| } |
| } |
| sta->supp_rates[local->oper_channel->band] = rates; |
| } |
| } |
| |
| static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev, |
| u8 *mac, struct station_parameters *params) |
| { |
| struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| struct sta_info *sta; |
| struct ieee80211_sub_if_data *sdata; |
| |
| /* Prevent a race with changing the rate control algorithm */ |
| if (!netif_running(dev)) |
| return -ENETDOWN; |
| |
| /* XXX: get sta belonging to dev */ |
| sta = sta_info_get(local, mac); |
| if (sta) { |
| sta_info_put(sta); |
| return -EEXIST; |
| } |
| |
| if (params->vlan) { |
| sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan); |
| |
| if (sdata->vif.type != IEEE80211_IF_TYPE_VLAN || |
| sdata->vif.type != IEEE80211_IF_TYPE_AP) |
| return -EINVAL; |
| } else |
| sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| |
| sta = sta_info_add(local, dev, mac, GFP_KERNEL); |
| if (!sta) |
| return -ENOMEM; |
| |
| sta->dev = sdata->dev; |
| if (sdata->vif.type == IEEE80211_IF_TYPE_VLAN || |
| sdata->vif.type == IEEE80211_IF_TYPE_AP) |
| ieee80211_send_layer2_update(sta); |
| |
| sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC; |
| |
| sta_apply_parameters(local, sta, params); |
| |
| rate_control_rate_init(sta, local); |
| |
| sta_info_put(sta); |
| |
| return 0; |
| } |
| |
| static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev, |
| u8 *mac) |
| { |
| struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| struct sta_info *sta; |
| |
| if (mac) { |
| /* XXX: get sta belonging to dev */ |
| sta = sta_info_get(local, mac); |
| if (!sta) |
| return -ENOENT; |
| |
| sta_info_free(sta); |
| sta_info_put(sta); |
| } else |
| sta_info_flush(local, dev); |
| |
| return 0; |
| } |
| |
| static int ieee80211_change_station(struct wiphy *wiphy, |
| struct net_device *dev, |
| u8 *mac, |
| struct station_parameters *params) |
| { |
| struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| struct sta_info *sta; |
| struct ieee80211_sub_if_data *vlansdata; |
| |
| /* XXX: get sta belonging to dev */ |
| sta = sta_info_get(local, mac); |
| if (!sta) |
| return -ENOENT; |
| |
| if (params->vlan && params->vlan != sta->dev) { |
| vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan); |
| |
| if (vlansdata->vif.type != IEEE80211_IF_TYPE_VLAN || |
| vlansdata->vif.type != IEEE80211_IF_TYPE_AP) |
| return -EINVAL; |
| |
| sta->dev = params->vlan; |
| ieee80211_send_layer2_update(sta); |
| } |
| |
| sta_apply_parameters(local, sta, params); |
| |
| sta_info_put(sta); |
| |
| return 0; |
| } |
| |
| struct cfg80211_ops mac80211_config_ops = { |
| .add_virtual_intf = ieee80211_add_iface, |
| .del_virtual_intf = ieee80211_del_iface, |
| .change_virtual_intf = ieee80211_change_iface, |
| .add_key = ieee80211_add_key, |
| .del_key = ieee80211_del_key, |
| .get_key = ieee80211_get_key, |
| .set_default_key = ieee80211_config_default_key, |
| .add_beacon = ieee80211_add_beacon, |
| .set_beacon = ieee80211_set_beacon, |
| .del_beacon = ieee80211_del_beacon, |
| .add_station = ieee80211_add_station, |
| .del_station = ieee80211_del_station, |
| .change_station = ieee80211_change_station, |
| .get_station = ieee80211_get_station, |
| }; |