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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>
This commit is contained in:
Johannes Berg 2007-12-19 02:03:32 +01:00 committed by David S. Miller
parent 62da92fb75
commit ed1b6cc7f8
3 changed files with 190 additions and 0 deletions
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24
include/linux/nl80211.h
View File

@ -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 @@ enum nl80211_commands {
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 @@ enum nl80211_commands {
* @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 @@ enum nl80211_attrs {
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,

33
include/net/cfg80211.h
View File

@ -69,6 +69,26 @@ struct key_params {
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 @@ struct wiphy;
* 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 @@ struct cfg80211_ops {
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 */

133
net/wireless/nl80211.c
View File

@ -69,6 +69,13 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
[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 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
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(&params, 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, &params);
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 @@ static struct genl_ops nl80211_ops[] = {
.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 */