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cfg80211: add P2P Device abstraction

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In order to support using a different MAC address
for the P2P Device address we must first have a
P2P Device abstraction that can be assigned a MAC
address.

This abstraction will also be useful to support
offloading P2P operations to the device, e.g.
periodic listen for discoverability.

Currently, the driver is responsible for assigning
a MAC address to the P2P Device, but this could be
changed by allowing a MAC address to be given to
the NEW_INTERFACE command.

As it has no associated netdev, a P2P Device can
only be identified by its wdev identifier but the
previous patches allowed using the wdev identifier
in various APIs, e.g. remain-on-channel.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2012-06-16 00:19:54 +02:00
parent cc74c0c7d6
commit 98104fdeda
9 changed files with 265 additions and 20 deletions
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30
include/linux/nl80211.h
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@@ -565,6 +565,14 @@
* %NL80211_ATTR_IFINDEX is now on %NL80211_ATTR_WIPHY_FREQ with
* %NL80211_ATTR_WIPHY_CHANNEL_TYPE.
*
* @NL80211_CMD_START_P2P_DEVICE: Start the given P2P Device, identified by
* its %NL80211_ATTR_WDEV identifier. It must have been created with
* %NL80211_CMD_NEW_INTERFACE previously. After it has been started, the
* P2P Device can be used for P2P operations, e.g. remain-on-channel and
* public action frame TX.
* @NL80211_CMD_STOP_P2P_DEVICE: Stop the given P2P Device, identified by
* its %NL80211_ATTR_WDEV identifier.
*
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -708,6 +716,9 @@ enum nl80211_commands {
NL80211_CMD_CH_SWITCH_NOTIFY,
NL80211_CMD_START_P2P_DEVICE,
NL80211_CMD_STOP_P2P_DEVICE,
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@@ -1575,6 +1586,10 @@ enum nl80211_attrs {
* @NL80211_IFTYPE_MESH_POINT: mesh point
* @NL80211_IFTYPE_P2P_CLIENT: P2P client
* @NL80211_IFTYPE_P2P_GO: P2P group owner
* @NL80211_IFTYPE_P2P_DEVICE: P2P device interface type, this is not a netdev
* and therefore can't be created in the normal ways, use the
* %NL80211_CMD_START_P2P_DEVICE and %NL80211_CMD_STOP_P2P_DEVICE
* commands to create and destroy one
* @NL80211_IFTYPE_MAX: highest interface type number currently defined
* @NUM_NL80211_IFTYPES: number of defined interface types
*
@@ -1593,6 +1608,7 @@ enum nl80211_iftype {
NL80211_IFTYPE_MESH_POINT,
NL80211_IFTYPE_P2P_CLIENT,
NL80211_IFTYPE_P2P_GO,
NL80211_IFTYPE_P2P_DEVICE,
/* keep last */
NUM_NL80211_IFTYPES,
@@ -2994,12 +3010,18 @@ enum nl80211_ap_sme_features {
* @NL80211_FEATURE_CELL_BASE_REG_HINTS: This driver has been tested
* to work properly to suppport receiving regulatory hints from
* cellular base stations.
* @NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL: If this is set, an active
* P2P Device (%NL80211_IFTYPE_P2P_DEVICE) requires its own channel
* in the interface combinations, even when it's only used for scan
* and remain-on-channel. This could be due to, for example, the
* remain-on-channel implementation requiring a channel context.
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
NL80211_FEATURE_HT_IBSS = 1 << 1,
NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3,
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
NL80211_FEATURE_HT_IBSS = 1 << 1,
NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3,
NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL = 1 << 4,
};
/**