From 8e30bc55de98c000b0b836cb42525c82f605f191 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 22 Apr 2009 17:45:38 +0200 Subject: [PATCH] nl80211: allow configuring IBSS beacon interval Make the JOIN_IBSS command look at the beacon interval attribute to see if the user requested a specific beacon interval, if not default to 100 TU (wext too). Signed-off-by: Johannes Berg Signed-off-by: John W. Linville --- include/linux/nl80211.h | 4 +++- include/net/cfg80211.h | 2 ++ net/wireless/ibss.c | 3 +++ net/wireless/nl80211.c | 12 +++++++++++- 4 files changed, 19 insertions(+), 2 deletions(-) diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index dc9d9ec5d1a..b6a48dd502c 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -230,7 +230,9 @@ * and optionally a MAC (as BSSID) and FREQ_FIXED attribute if those * should be fixed rather than automatically determined. Can only be * executed on a network interface that is UP, and fixed BSSID/FREQ - * may be rejected. + * may be rejected. Another optional parameter is the beacon interval, + * given in the %NL80211_ATTR_BEACON_INTERVAL attribute, which if not + * given defaults to 100 TU (102.4ms). * @NL80211_CMD_LEAVE_IBSS: Leave the IBSS -- no special arguments, the IBSS is * determined by the network interface. * diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 54bc69c8369..7f7b53b69cb 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -733,6 +733,7 @@ struct cfg80211_disassoc_request { * IBSSs to join on other channels. * @ie: information element(s) to include in the beacon * @ie_len: length of that + * @beacon_interval: beacon interval to use */ struct cfg80211_ibss_params { u8 *ssid; @@ -740,6 +741,7 @@ struct cfg80211_ibss_params { struct ieee80211_channel *channel; u8 *ie; u8 ssid_len, ie_len; + u16 beacon_interval; bool channel_fixed; }; diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c index b5c601e1b1b..3c38afaed28 100644 --- a/net/wireless/ibss.c +++ b/net/wireless/ibss.c @@ -116,6 +116,9 @@ static int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev, enum ieee80211_band band; int i; + if (!wdev->wext.beacon_interval) + wdev->wext.beacon_interval = 100; + /* try to find an IBSS channel if none requested ... */ if (!wdev->wext.channel) { for (band = 0; band < IEEE80211_NUM_BANDS; band++) { diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 97bb5c80125..3b21b3e89e9 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -3159,6 +3159,8 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info) struct wiphy *wiphy; int err; + memset(&ibss, 0, sizeof(ibss)); + if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) return -EINVAL; @@ -3167,6 +3169,15 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info) !nla_len(info->attrs[NL80211_ATTR_SSID])) return -EINVAL; + ibss.beacon_interval = 100; + + if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) { + ibss.beacon_interval = + nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]); + if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000) + return -EINVAL; + } + rtnl_lock(); err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev); @@ -3189,7 +3200,6 @@ static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info) } wiphy = &drv->wiphy; - memset(&ibss, 0, sizeof(ibss)); if (info->attrs[NL80211_ATTR_MAC]) ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); -- 2.41.0