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cfg80211/nl80211: station handling
This patch adds station handling to cfg80211/nl80211. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
David S. Miller
parent
ed1b6cc7f8
commit
5727ef1b2e
@ -6,6 +6,18 @@
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* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
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*/
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/**
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* DOC: Station handling
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*
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* Stations are added per interface, but a special case exists with VLAN
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* interfaces. When a station is bound to an AP interface, it may be moved
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* into a VLAN identified by a VLAN interface index (%NL80211_ATTR_STA_VLAN).
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* The station is still assumed to belong to the AP interface it was added
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* to.
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*
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* TODO: need more info?
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*/
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/**
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* enum nl80211_commands - supported nl80211 commands
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*
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@ -56,6 +68,16 @@
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* parameters are like for %NL80211_CMD_SET_BEACON.
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* @NL80211_CMD_DEL_BEACON: remove the beacon, stop sending it
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*
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* @NL80211_CMD_GET_STATION: Get station attributes for station identified by
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* %NL80211_ATTR_MAC on the interface identified by %NL80211_ATTR_IFINDEX.
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* @NL80211_CMD_SET_STATION: Set station attributes for station identified by
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* %NL80211_ATTR_MAC on the interface identified by %NL80211_ATTR_IFINDEX.
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* @NL80211_CMD_NEW_STATION: Add a station with given attributes to the
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* the interface identified by %NL80211_ATTR_IFINDEX.
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* @NL80211_CMD_DEL_STATION: Remove a station identified by %NL80211_ATTR_MAC
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* or, if no MAC address given, all stations, on the interface identified
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* by %NL80211_ATTR_IFINDEX.
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*
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* @NL80211_CMD_MAX: highest used command number
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* @__NL80211_CMD_AFTER_LAST: internal use
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*/
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@ -83,6 +105,11 @@ enum nl80211_commands {
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NL80211_CMD_NEW_BEACON,
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NL80211_CMD_DEL_BEACON,
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NL80211_CMD_GET_STATION,
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NL80211_CMD_SET_STATION,
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NL80211_CMD_NEW_STATION,
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NL80211_CMD_DEL_STATION,
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/* add commands here */
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/* used to define NL80211_CMD_MAX below */
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@ -120,6 +147,17 @@ enum nl80211_commands {
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* @NL80211_ATTR_BEACON_HEAD: portion of the beacon before the TIM IE
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* @NL80211_ATTR_BEACON_TAIL: portion of the beacon after the TIM IE
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*
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* @NL80211_ATTR_STA_AID: Association ID for the station (u16)
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* @NL80211_ATTR_STA_FLAGS: flags, nested element with NLA_FLAG attributes of
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* &enum nl80211_sta_flags.
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* @NL80211_ATTR_STA_LISTEN_INTERVAL: listen interval as defined by
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* IEEE 802.11 7.3.1.6 (u16).
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* @NL80211_ATTR_STA_SUPPORTED_RATES: supported rates, array of supported
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* rates as defined by IEEE 802.11 7.3.2.2 but without the length
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* restriction (at most %NL80211_MAX_SUPP_RATES).
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* @NL80211_ATTR_STA_VLAN: interface index of VLAN interface to move station
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* to, or the AP interface the station was originally added to to.
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*
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* @NL80211_ATTR_MAX: highest attribute number currently defined
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* @__NL80211_ATTR_AFTER_LAST: internal use
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*/
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@ -147,12 +185,20 @@ enum nl80211_attrs {
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NL80211_ATTR_BEACON_HEAD,
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NL80211_ATTR_BEACON_TAIL,
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NL80211_ATTR_STA_AID,
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NL80211_ATTR_STA_FLAGS,
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NL80211_ATTR_STA_LISTEN_INTERVAL,
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NL80211_ATTR_STA_SUPPORTED_RATES,
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NL80211_ATTR_STA_VLAN,
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/* add attributes here, update the policy in nl80211.c */
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__NL80211_ATTR_AFTER_LAST,
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NL80211_ATTR_MAX = __NL80211_ATTR_AFTER_LAST - 1
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};
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#define NL80211_MAX_SUPP_RATES 32
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/**
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* enum nl80211_iftype - (virtual) interface types
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*
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@ -184,4 +230,26 @@ enum nl80211_iftype {
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NL80211_IFTYPE_MAX = __NL80211_IFTYPE_AFTER_LAST - 1
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};
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/**
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* enum nl80211_sta_flags - station flags
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*
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* Station flags. When a station is added to an AP interface, it is
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* assumed to be already associated (and hence authenticated.)
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*
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* @NL80211_STA_FLAG_AUTHORIZED: station is authorized (802.1X)
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* @NL80211_STA_FLAG_SHORT_PREAMBLE: station is capable of receiving frames
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* with short barker preamble
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* @NL80211_STA_FLAG_WME: station is WME/QoS capable
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*/
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enum nl80211_sta_flags {
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__NL80211_STA_FLAG_INVALID,
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NL80211_STA_FLAG_AUTHORIZED,
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NL80211_STA_FLAG_SHORT_PREAMBLE,
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NL80211_STA_FLAG_WME,
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/* keep last */
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__NL80211_STA_FLAG_AFTER_LAST,
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NL80211_STA_FLAG_MAX = __NL80211_STA_FLAG_AFTER_LAST - 1
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};
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#endif /* __LINUX_NL80211_H */
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@ -89,6 +89,47 @@ struct beacon_parameters {
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int head_len, tail_len;
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};
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/**
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* enum station_flags - station flags
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*
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* Station capability flags. Note that these must be the bits
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* according to the nl80211 flags.
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*
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* @STATION_FLAG_CHANGED: station flags were changed
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* @STATION_FLAG_AUTHORIZED: station is authorized to send frames (802.1X)
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* @STATION_FLAG_SHORT_PREAMBLE: station is capable of receiving frames
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* with short preambles
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* @STATION_FLAG_WME: station is WME/QoS capable
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*/
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enum station_flags {
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STATION_FLAG_CHANGED = 1<<0,
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STATION_FLAG_AUTHORIZED = 1<<NL80211_STA_FLAG_AUTHORIZED,
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STATION_FLAG_SHORT_PREAMBLE = 1<<NL80211_STA_FLAG_SHORT_PREAMBLE,
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STATION_FLAG_WME = 1<<NL80211_STA_FLAG_WME,
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};
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/**
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* struct station_parameters - station parameters
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*
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* Used to change and create a new station.
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*
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* @vlan: vlan interface station should belong to
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* @supported_rates: supported rates in IEEE 802.11 format
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* (or NULL for no change)
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* @supported_rates_len: number of supported rates
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* @station_flags: station flags (see &enum station_flags)
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* @listen_interval: listen interval or -1 for no change
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* @aid: AID or zero for no change
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*/
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struct station_parameters {
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u8 *supported_rates;
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struct net_device *vlan;
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u32 station_flags;
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int listen_interval;
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u16 aid;
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u8 supported_rates_len;
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};
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/* from net/wireless.h */
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struct wiphy;
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@ -130,6 +171,12 @@ struct wiphy;
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* interface. This should reject the call when no beacon has been
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* configured.
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* @del_beacon: Remove beacon configuration and stop sending the beacon.
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*
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* @add_station: Add a new station.
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*
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* @del_station: Remove a station; @mac may be NULL to remove all stations.
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*
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* @change_station: Modify a given station.
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*/
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struct cfg80211_ops {
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int (*add_virtual_intf)(struct wiphy *wiphy, char *name,
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@ -155,6 +202,14 @@ struct cfg80211_ops {
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int (*set_beacon)(struct wiphy *wiphy, struct net_device *dev,
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struct beacon_parameters *info);
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int (*del_beacon)(struct wiphy *wiphy, struct net_device *dev);
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int (*add_station)(struct wiphy *wiphy, struct net_device *dev,
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u8 *mac, struct station_parameters *params);
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int (*del_station)(struct wiphy *wiphy, struct net_device *dev,
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u8 *mac);
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int (*change_station)(struct wiphy *wiphy, struct net_device *dev,
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u8 *mac, struct station_parameters *params);
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};
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#endif /* __NET_CFG80211_H */
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@ -76,6 +76,12 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
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.len = IEEE80211_MAX_DATA_LEN },
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[NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
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.len = IEEE80211_MAX_DATA_LEN },
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[NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
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[NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
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[NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
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[NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
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.len = NL80211_MAX_SUPP_RATES },
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[NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
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};
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/* message building helper */
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@ -715,6 +721,210 @@ static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
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return err;
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}
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static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
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[NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
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[NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
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[NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
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};
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static int parse_station_flags(struct nlattr *nla, u32 *staflags)
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{
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struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
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int flag;
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*staflags = 0;
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if (!nla)
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return 0;
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if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
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nla, sta_flags_policy))
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return -EINVAL;
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*staflags = STATION_FLAG_CHANGED;
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for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
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if (flags[flag])
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*staflags |= (1<<flag);
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return 0;
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}
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static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
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{
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return -EOPNOTSUPP;
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}
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/*
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* Get vlan interface making sure it is on the right wiphy.
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*/
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static int get_vlan(struct nlattr *vlanattr,
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struct cfg80211_registered_device *rdev,
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struct net_device **vlan)
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{
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*vlan = NULL;
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if (vlanattr) {
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*vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
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if (!*vlan)
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return -ENODEV;
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if (!(*vlan)->ieee80211_ptr)
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return -EINVAL;
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if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
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return -EINVAL;
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}
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return 0;
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}
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static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
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{
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struct cfg80211_registered_device *drv;
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int err;
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struct net_device *dev;
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struct station_parameters params;
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u8 *mac_addr = NULL;
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memset(¶ms, 0, sizeof(params));
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params.listen_interval = -1;
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if (info->attrs[NL80211_ATTR_STA_AID])
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return -EINVAL;
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if (!info->attrs[NL80211_ATTR_MAC])
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return -EINVAL;
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
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params.supported_rates =
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nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
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params.supported_rates_len =
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nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
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}
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if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
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params.listen_interval =
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nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
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if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
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¶ms.station_flags))
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return -EINVAL;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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if (err)
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return err;
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err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan);
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if (err)
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goto out;
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if (!drv->ops->change_station) {
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err = -EOPNOTSUPP;
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goto out;
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}
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rtnl_lock();
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err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, ¶ms);
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rtnl_unlock();
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out:
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if (params.vlan)
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dev_put(params.vlan);
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cfg80211_put_dev(drv);
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dev_put(dev);
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return err;
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}
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static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
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{
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struct cfg80211_registered_device *drv;
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int err;
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struct net_device *dev;
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struct station_parameters params;
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u8 *mac_addr = NULL;
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memset(¶ms, 0, sizeof(params));
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if (!info->attrs[NL80211_ATTR_MAC])
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return -EINVAL;
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if (!info->attrs[NL80211_ATTR_STA_AID])
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return -EINVAL;
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if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
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return -EINVAL;
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if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
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return -EINVAL;
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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params.supported_rates =
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nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
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params.supported_rates_len =
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nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
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params.listen_interval =
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nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
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params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
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if (parse_station_flags(info->attrs[NL80211_ATTR_STA_FLAGS],
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¶ms.station_flags))
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return -EINVAL;
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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if (err)
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return err;
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err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan);
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if (err)
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goto out;
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if (!drv->ops->add_station) {
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err = -EOPNOTSUPP;
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goto out;
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}
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rtnl_lock();
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err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, ¶ms);
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rtnl_unlock();
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out:
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if (params.vlan)
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dev_put(params.vlan);
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cfg80211_put_dev(drv);
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dev_put(dev);
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return err;
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}
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static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
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{
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struct cfg80211_registered_device *drv;
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int err;
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struct net_device *dev;
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u8 *mac_addr = NULL;
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if (info->attrs[NL80211_ATTR_MAC])
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mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
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err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
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if (err)
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return err;
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if (!drv->ops->del_station) {
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err = -EOPNOTSUPP;
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goto out;
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}
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rtnl_lock();
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err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
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rtnl_unlock();
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out:
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cfg80211_put_dev(drv);
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dev_put(dev);
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return err;
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}
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static struct genl_ops nl80211_ops[] = {
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{
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.cmd = NL80211_CMD_GET_WIPHY,
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@ -796,6 +1006,31 @@ static struct genl_ops nl80211_ops[] = {
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.flags = GENL_ADMIN_PERM,
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.doit = nl80211_del_beacon,
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},
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{
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.cmd = NL80211_CMD_GET_STATION,
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.doit = nl80211_get_station,
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/* TODO: implement dumpit */
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.policy = nl80211_policy,
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.flags = GENL_ADMIN_PERM,
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},
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{
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.cmd = NL80211_CMD_SET_STATION,
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.doit = nl80211_set_station,
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.policy = nl80211_policy,
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.flags = GENL_ADMIN_PERM,
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},
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{
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.cmd = NL80211_CMD_NEW_STATION,
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.doit = nl80211_new_station,
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.policy = nl80211_policy,
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.flags = GENL_ADMIN_PERM,
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},
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{
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.cmd = NL80211_CMD_DEL_STATION,
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.doit = nl80211_del_station,
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.policy = nl80211_policy,
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.flags = GENL_ADMIN_PERM,
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},
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};
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/* multicast groups */
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