From ed1b6cc7f80f831e192704b05b9917f9cc37be15 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 19 Dec 2007 02:03:32 +0100 Subject: [PATCH] cfg80211/nl80211: add beacon settings This adds the necessary API to cfg80211/nl80211 to allow changing beaconing settings. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville Signed-off-by: David S. Miller --- include/linux/nl80211.h | 24 ++++++++ include/net/cfg80211.h | 33 ++++++++++ net/wireless/nl80211.c | 133 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 190 insertions(+) diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index 8dc807d9c2..f1e455a8b4 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 @@ 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, diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 3db7dfa53b..fc94852e96 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -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 */ diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 0909363885..306ae019ea 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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(¶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 @@ 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 */ -- 2.39.5