Commit 99cf5f5f authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: dont add BSS when creating IBSS 



There's no need to create a BSS struct only to pass it to
ieee80211_sta_join_ibss, so refactor this function into
__ieee80211_sta_join_ibss which takes all the relevant
paramters, and ieee80211_sta_join_ibss which takes a BSS
struct (used when joining an IBSS that already has other
members).

Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 2a519311

net/mac80211/ieee80211_i.h

+0 −3
Original line number Diff line number Diff line
@@ -953,9 +953,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local, 
			  struct ieee80211_channel *channel,

			  bool beacon);

struct ieee80211_bss *

ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,

		     u8 *ssid, u8 ssid_len);

struct ieee80211_bss *

ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,

		     u8 *ssid, u8 ssid_len);

void ieee80211_rx_bss_put(struct ieee80211_local *local,

net/mac80211/mlme.c

+58 −49
Original line number Diff line number Diff line
@@ -546,14 +546,15 @@ void ieee80211_send_pspoll(struct ieee80211_local *local, 


/* MLME */

static void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,

					 struct ieee80211_bss *bss)

					 const size_t supp_rates_len,

					 const u8 *supp_rates)

{

	struct ieee80211_local *local = sdata->local;

	int i, have_higher_than_11mbit = 0;



	/* cf. IEEE 802.11 9.2.12 */

	for (i = 0; i < bss->supp_rates_len; i++)

		if ((bss->supp_rates[i] & 0x7f) * 5 > 110)

	for (i = 0; i < supp_rates_len; i++)

		if ((supp_rates[i] & 0x7f) * 5 > 110)

			have_higher_than_11mbit = 1;



	if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
@@ -1546,9 +1547,13 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 
}





static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,

static int __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,

				     struct ieee80211_if_sta *ifsta,

				   struct ieee80211_bss *bss)

				     const u8 *bssid, const int beacon_int,

				     const int freq,

				     const size_t supp_rates_len,

				     const u8 *supp_rates,

				     const u16 capability)

{

	struct ieee80211_local *local = sdata->local;

	int res = 0, rates, i, j;
@@ -1564,7 +1569,7 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 
	}



	if ((ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) &&

	   memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) == 0)

	   memcmp(ifsta->bssid, bssid, ETH_ALEN) == 0)

		return res;



	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
@@ -1575,28 +1580,28 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 
		return -ENOMEM;

	}



	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];



	if (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) {

		/* Remove possible STA entries from other IBSS networks. */

		sta_info_flush_delayed(sdata);

	}



	memcpy(ifsta->bssid, bss->bssid, ETH_ALEN);

	memcpy(ifsta->bssid, bssid, ETH_ALEN);

	res = ieee80211_if_config(sdata, IEEE80211_IFCC_BSSID);

	if (res)

		return res;



	local->hw.conf.beacon_int = bss->beacon_int >= 10 ? bss->beacon_int : 10;

	local->hw.conf.beacon_int = beacon_int >= 10 ? beacon_int : 10;



	sdata->drop_unencrypted = bss->capability &

	sdata->drop_unencrypted = capability &

		WLAN_CAPABILITY_PRIVACY ? 1 : 0;



	res = ieee80211_set_freq(sdata, bss->freq);

	res = ieee80211_set_freq(sdata, freq);



	if (res)

		return res;



	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];



	/* Build IBSS probe response */



	skb_reserve(skb, local->hw.extra_tx_headroom);
@@ -1611,27 +1616,26 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 
	memcpy(mgmt->bssid, ifsta->bssid, ETH_ALEN);

	mgmt->u.beacon.beacon_int =

		cpu_to_le16(local->hw.conf.beacon_int);

	mgmt->u.beacon.timestamp = cpu_to_le64(bss->timestamp);

	mgmt->u.beacon.capab_info = cpu_to_le16(bss->capability);

	mgmt->u.beacon.capab_info = cpu_to_le16(capability);



	pos = skb_put(skb, 2 + ifsta->ssid_len);

	*pos++ = WLAN_EID_SSID;

	*pos++ = ifsta->ssid_len;

	memcpy(pos, ifsta->ssid, ifsta->ssid_len);



	rates = bss->supp_rates_len;

	rates = supp_rates_len;

	if (rates > 8)

		rates = 8;

	pos = skb_put(skb, 2 + rates);

	*pos++ = WLAN_EID_SUPP_RATES;

	*pos++ = rates;

	memcpy(pos, bss->supp_rates, rates);

	memcpy(pos, supp_rates, rates);



	if (bss->band == IEEE80211_BAND_2GHZ) {

	if (sband->band == IEEE80211_BAND_2GHZ) {

		pos = skb_put(skb, 2 + 1);

		*pos++ = WLAN_EID_DS_PARAMS;

		*pos++ = 1;

		*pos++ = ieee80211_frequency_to_channel(bss->freq);

		*pos++ = ieee80211_frequency_to_channel(freq);

	}



	pos = skb_put(skb, 2 + 2);
@@ -1641,12 +1645,12 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 
	*pos++ = 0;

	*pos++ = 0;



	if (bss->supp_rates_len > 8) {

		rates = bss->supp_rates_len - 8;

	if (supp_rates_len > 8) {

		rates = supp_rates_len - 8;

		pos = skb_put(skb, 2 + rates);

		*pos++ = WLAN_EID_EXT_SUPP_RATES;

		*pos++ = rates;

		memcpy(pos, &bss->supp_rates[8], rates);

		memcpy(pos, &supp_rates[8], rates);

	}



	add_extra_ies(skb, sdata->u.sta.ie_proberesp,
@@ -1659,16 +1663,15 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 




	rates = 0;

	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];

	for (i = 0; i < bss->supp_rates_len; i++) {

		int bitrate = (bss->supp_rates[i] & 0x7f) * 5;

	for (i = 0; i < supp_rates_len; i++) {

		int bitrate = (supp_rates[i] & 0x7f) * 5;

		for (j = 0; j < sband->n_bitrates; j++)

			if (sband->bitrates[j].bitrate == bitrate)

				rates |= BIT(j);

	}

	ifsta->supp_rates_bits[local->hw.conf.channel->band] = rates;



	ieee80211_sta_def_wmm_params(sdata, bss);

	ieee80211_sta_def_wmm_params(sdata, supp_rates_len, supp_rates);



	ifsta->flags |= IEEE80211_STA_PREV_BSSID_SET;

	ifsta->state = IEEE80211_STA_MLME_IBSS_JOINED;
@@ -1677,12 +1680,23 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata, 
	ieee80211_led_assoc(local, true);



	memset(&wrqu, 0, sizeof(wrqu));

	memcpy(wrqu.ap_addr.sa_data, bss->bssid, ETH_ALEN);

	memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);

	wireless_send_event(sdata->dev, SIOCGIWAP, &wrqu, NULL);



	return res;

}



static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,

				   struct ieee80211_if_sta *ifsta,

				   struct ieee80211_bss *bss)

{

	return __ieee80211_sta_join_ibss(sdata, ifsta,

					 bss->bssid, bss->beacon_int,

					 bss->freq,

					 bss->supp_rates_len, bss->supp_rates,

					 bss->capability);

}



static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,

				  struct ieee80211_mgmt *mgmt,

				  size_t len,
@@ -2251,11 +2265,12 @@ static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, 
				     struct ieee80211_if_sta *ifsta)

{

	struct ieee80211_local *local = sdata->local;

	struct ieee80211_bss *bss;

	struct ieee80211_supported_band *sband;

	u8 bssid[ETH_ALEN], *pos;

	u8 *pos;

	u8 bssid[ETH_ALEN];

	u8 supp_rates[IEEE80211_MAX_SUPP_RATES];

	u16 capability;

	int i;

	int ret;



	if (sdata->u.sta.flags & IEEE80211_STA_BSSID_SET) {

		memcpy(bssid, ifsta->bssid, ETH_ALEN);
@@ -2273,36 +2288,29 @@ static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata, 
	printk(KERN_DEBUG "%s: Creating new IBSS network, BSSID %pM\n",

	       sdata->dev->name, bssid);



	bss = ieee80211_rx_bss_add(local, bssid,

				   local->hw.conf.channel->center_freq,

				   sdata->u.sta.ssid, sdata->u.sta.ssid_len);

	if (!bss)

		return -ENOMEM;



	bss->band = local->hw.conf.channel->band;

	sband = local->hw.wiphy->bands[bss->band];

	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];



	if (local->hw.conf.beacon_int == 0)

		local->hw.conf.beacon_int = 100;

	bss->beacon_int = local->hw.conf.beacon_int;

	bss->last_update = jiffies;

	bss->capability = WLAN_CAPABILITY_IBSS;



	capability = WLAN_CAPABILITY_IBSS;



	if (sdata->default_key)

		bss->capability |= WLAN_CAPABILITY_PRIVACY;

		capability |= WLAN_CAPABILITY_PRIVACY;

	else

		sdata->drop_unencrypted = 0;



	bss->supp_rates_len = sband->n_bitrates;

	pos = bss->supp_rates;

	pos = supp_rates;

	for (i = 0; i < sband->n_bitrates; i++) {

		int rate = sband->bitrates[i].bitrate;

		*pos++ = (u8) (rate / 5);

	}



	ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);

	ieee80211_rx_bss_put(local, bss);

	return ret;

	return __ieee80211_sta_join_ibss(sdata, ifsta,

					 bssid, local->hw.conf.beacon_int,

					 local->hw.conf.channel->center_freq,

					 sband->n_bitrates, supp_rates,

					 capability);

}
@@ -2471,7 +2479,8 @@ static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata, 
			ieee80211_sta_set_ssid(sdata, selected->ssid,

					       selected->ssid_len);

		ieee80211_sta_set_bssid(sdata, selected->bssid);

		ieee80211_sta_def_wmm_params(sdata, selected);

		ieee80211_sta_def_wmm_params(sdata, selected->supp_rates_len,

						    selected->supp_rates);

		if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)

			sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;

		else

net/mac80211/scan.c

+2 −6
Original line number Diff line number Diff line
@@ -14,11 +14,7 @@ 


/* TODO:

 * figure out how to avoid that the "current BSS" expires

 * clean up IBSS code (in MLME), see why it adds a BSS to the list

 * use cfg80211's BSS handling (depends on IBSS TODO above)

 * order BSS list by RSSI(?) ("quality of AP")

 * scan result table filtering (by capability (privacy, IBSS/BSS, WPA/RSN IE,

 *    SSID)

 * use cfg80211's BSS handling

 */



#include <linux/wireless.h>
@@ -107,7 +103,7 @@ static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local, 
	}

}



struct ieee80211_bss *

static struct ieee80211_bss *

ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,

		     u8 *ssid, u8 ssid_len)

{

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