cfg80211/nl80211: add beacon settings
This adds the necessary API to cfg80211/nl80211 to allow
changing beaconing settings.
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>
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 8dc807d9..f1e455a 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -47,6 +47,15 @@
* @NL80211_CMD_DEL_KEY: delete a key identified by %NL80211_ATTR_KEY_IDX
* or %NL80211_ATTR_MAC.
*
+ * @NL80211_CMD_GET_BEACON: retrieve beacon information (returned in a
+ * %NL80222_CMD_NEW_BEACON message)
+ * @NL80211_CMD_SET_BEACON: set the beacon on an access point interface
+ * using the %NL80211_ATTR_BEACON_INTERVAL, %NL80211_ATTR_DTIM_PERIOD,
+ * %NL80211_BEACON_HEAD and %NL80211_BEACON_TAIL attributes.
+ * @NL80211_CMD_NEW_BEACON: add a new beacon to an access point interface,
+ * parameters are like for %NL80211_CMD_SET_BEACON.
+ * @NL80211_CMD_DEL_BEACON: remove the beacon, stop sending it
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@@ -69,6 +78,11 @@
NL80211_CMD_NEW_KEY,
NL80211_CMD_DEL_KEY,
+ NL80211_CMD_GET_BEACON,
+ NL80211_CMD_SET_BEACON,
+ NL80211_CMD_NEW_BEACON,
+ NL80211_CMD_DEL_BEACON,
+
/* add commands here */
/* used to define NL80211_CMD_MAX below */
@@ -101,6 +115,11 @@
* @NL80211_ATTR_KEY_SEQ: transmit key sequence number (IV/PN) for TKIP and
* CCMP keys, each six bytes in little endian
*
+ * @NL80211_ATTR_BEACON_INTERVAL: beacon interval in TU
+ * @NL80211_ATTR_DTIM_PERIOD: DTIM period for beaconing
+ * @NL80211_ATTR_BEACON_HEAD: portion of the beacon before the TIM IE
+ * @NL80211_ATTR_BEACON_TAIL: portion of the beacon after the TIM IE
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@@ -123,6 +142,11 @@
NL80211_ATTR_KEY_SEQ,
NL80211_ATTR_KEY_DEFAULT,
+ NL80211_ATTR_BEACON_INTERVAL,
+ NL80211_ATTR_DTIM_PERIOD,
+ NL80211_ATTR_BEACON_HEAD,
+ NL80211_ATTR_BEACON_TAIL,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 3db7dfa..fc94852 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -69,6 +69,26 @@
u32 cipher;
};
+/**
+ * struct beacon_parameters - beacon parameters
+ *
+ * Used to configure the beacon for an interface.
+ *
+ * @head: head portion of beacon (before TIM IE)
+ * or %NULL if not changed
+ * @tail: tail portion of beacon (after TIM IE)
+ * or %NULL if not changed
+ * @interval: beacon interval or zero if not changed
+ * @dtim_period: DTIM period or zero if not changed
+ * @head_len: length of @head
+ * @tail_len: length of @tail
+ */
+struct beacon_parameters {
+ u8 *head, *tail;
+ int interval, dtim_period;
+ int head_len, tail_len;
+};
+
/* from net/wireless.h */
struct wiphy;
@@ -103,6 +123,13 @@
* and @key_index
*
* @set_default_key: set the default key on an interface
+ *
+ * @add_beacon: Add a beacon with given parameters, @head, @interval
+ * and @dtim_period will be valid, @tail is optional.
+ * @set_beacon: Change the beacon parameters for an access point mode
+ * interface. This should reject the call when no beacon has been
+ * configured.
+ * @del_beacon: Remove beacon configuration and stop sending the beacon.
*/
struct cfg80211_ops {
int (*add_virtual_intf)(struct wiphy *wiphy, char *name,
@@ -122,6 +149,12 @@
int (*set_default_key)(struct wiphy *wiphy,
struct net_device *netdev,
u8 key_index);
+
+ int (*add_beacon)(struct wiphy *wiphy, struct net_device *dev,
+ struct beacon_parameters *info);
+ int (*set_beacon)(struct wiphy *wiphy, struct net_device *dev,
+ struct beacon_parameters *info);
+ int (*del_beacon)(struct wiphy *wiphy, struct net_device *dev);
};
#endif /* __NET_CFG80211_H */
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 0909363..306ae01 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -69,6 +69,13 @@
[NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
[NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
[NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
+
+ [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
+ [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
+ [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
+ .len = IEEE80211_MAX_DATA_LEN },
+ [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
+ .len = IEEE80211_MAX_DATA_LEN },
};
/* message building helper */
@@ -600,6 +607,114 @@
return err;
}
+static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
+{
+ int (*call)(struct wiphy *wiphy, struct net_device *dev,
+ struct beacon_parameters *info);
+ struct cfg80211_registered_device *drv;
+ int err;
+ struct net_device *dev;
+ struct beacon_parameters params;
+ int haveinfo = 0;
+
+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+ if (err)
+ return err;
+
+ switch (info->genlhdr->cmd) {
+ case NL80211_CMD_NEW_BEACON:
+ /* these are required for NEW_BEACON */
+ if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
+ !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
+ !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ call = drv->ops->add_beacon;
+ break;
+ case NL80211_CMD_SET_BEACON:
+ call = drv->ops->set_beacon;
+ break;
+ default:
+ WARN_ON(1);
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!call) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ memset(¶ms, 0, sizeof(params));
+
+ if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
+ params.interval =
+ nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
+ haveinfo = 1;
+ }
+
+ if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
+ params.dtim_period =
+ nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
+ haveinfo = 1;
+ }
+
+ if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
+ params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
+ params.head_len =
+ nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
+ haveinfo = 1;
+ }
+
+ if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
+ params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
+ params.tail_len =
+ nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
+ haveinfo = 1;
+ }
+
+ if (!haveinfo) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ rtnl_lock();
+ err = call(&drv->wiphy, dev, ¶ms);
+ rtnl_unlock();
+
+ out:
+ cfg80211_put_dev(drv);
+ dev_put(dev);
+ return err;
+}
+
+static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *drv;
+ int err;
+ struct net_device *dev;
+
+ err = get_drv_dev_by_info_ifindex(info, &drv, &dev);
+ if (err)
+ return err;
+
+ if (!drv->ops->del_beacon) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ rtnl_lock();
+ err = drv->ops->del_beacon(&drv->wiphy, dev);
+ rtnl_unlock();
+
+ out:
+ cfg80211_put_dev(drv);
+ dev_put(dev);
+ return err;
+}
+
static struct genl_ops nl80211_ops[] = {
{
.cmd = NL80211_CMD_GET_WIPHY,
@@ -663,6 +778,24 @@
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = NL80211_CMD_SET_BEACON,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ .doit = nl80211_addset_beacon,
+ },
+ {
+ .cmd = NL80211_CMD_NEW_BEACON,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ .doit = nl80211_addset_beacon,
+ },
+ {
+ .cmd = NL80211_CMD_DEL_BEACON,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ .doit = nl80211_del_beacon,
+ },
};
/* multicast groups */
