1735 строки
48 KiB
C
1735 строки
48 KiB
C
/*
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* mac80211 TDLS handling code
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*
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* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
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* Copyright 2014, Intel Corporation
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* Copyright 2014 Intel Mobile Communications GmbH
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*
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* This file is GPLv2 as found in COPYING.
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*/
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#include <linux/ieee80211.h>
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#include <linux/log2.h>
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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/* give usermode some time for retries in setting up the TDLS session */
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#define TDLS_PEER_SETUP_TIMEOUT (15 * HZ)
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void ieee80211_tdls_peer_del_work(struct work_struct *wk)
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{
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struct ieee80211_sub_if_data *sdata;
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struct ieee80211_local *local;
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sdata = container_of(wk, struct ieee80211_sub_if_data,
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u.mgd.tdls_peer_del_work.work);
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local = sdata->local;
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mutex_lock(&local->mtx);
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if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) {
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tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer);
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sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer);
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eth_zero_addr(sdata->u.mgd.tdls_peer);
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}
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mutex_unlock(&local->mtx);
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}
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static void ieee80211_tdls_add_ext_capab(struct ieee80211_local *local,
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struct sk_buff *skb)
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{
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u8 *pos = (void *)skb_put(skb, 7);
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bool chan_switch = local->hw.wiphy->features &
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NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
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*pos++ = WLAN_EID_EXT_CAPABILITY;
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*pos++ = 5; /* len */
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*pos++ = 0x0;
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*pos++ = 0x0;
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*pos++ = 0x0;
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*pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0;
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*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
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}
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static u8
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ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb, u16 start, u16 end,
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u16 spacing)
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{
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u8 subband_cnt = 0, ch_cnt = 0;
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struct ieee80211_channel *ch;
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struct cfg80211_chan_def chandef;
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int i, subband_start;
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for (i = start; i <= end; i += spacing) {
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if (!ch_cnt)
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subband_start = i;
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ch = ieee80211_get_channel(sdata->local->hw.wiphy, i);
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if (ch) {
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/* we will be active on the channel */
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cfg80211_chandef_create(&chandef, ch,
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NL80211_CHAN_NO_HT);
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if (cfg80211_reg_can_beacon(sdata->local->hw.wiphy,
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&chandef,
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sdata->wdev.iftype)) {
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ch_cnt++;
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/*
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* check if the next channel is also part of
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* this allowed range
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*/
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continue;
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}
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}
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/*
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* we've reached the end of a range, with allowed channels
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* found
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*/
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if (ch_cnt) {
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u8 *pos = skb_put(skb, 2);
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*pos++ = ieee80211_frequency_to_channel(subband_start);
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*pos++ = ch_cnt;
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subband_cnt++;
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ch_cnt = 0;
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}
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}
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/* all channels in the requested range are allowed - add them here */
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if (ch_cnt) {
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u8 *pos = skb_put(skb, 2);
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*pos++ = ieee80211_frequency_to_channel(subband_start);
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*pos++ = ch_cnt;
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subband_cnt++;
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}
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return subband_cnt;
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}
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static void
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ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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/*
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* Add possible channels for TDLS. These are channels that are allowed
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* to be active.
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*/
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u8 subband_cnt;
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u8 *pos = skb_put(skb, 2);
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*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
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/*
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* 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as
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* this doesn't happen in real world scenarios.
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*/
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/* 2GHz, with 5MHz spacing */
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subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5);
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/* 5GHz, with 20MHz spacing */
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subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20);
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/* length */
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*pos = 2 * subband_cnt;
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}
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static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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u8 *pos;
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u8 op_class;
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if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef,
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&op_class))
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return;
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pos = skb_put(skb, 4);
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*pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
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*pos++ = 2; /* len */
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*pos++ = op_class;
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*pos++ = op_class; /* give current operating class as alternate too */
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}
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static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
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{
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u8 *pos = (void *)skb_put(skb, 3);
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*pos++ = WLAN_EID_BSS_COEX_2040;
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*pos++ = 1; /* len */
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*pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
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}
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static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
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u16 status_code)
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{
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struct ieee80211_local *local = sdata->local;
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u16 capab;
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/* The capability will be 0 when sending a failure code */
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if (status_code != 0)
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return 0;
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capab = 0;
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if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ)
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return capab;
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
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if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
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capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
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return capab;
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}
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static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb, const u8 *peer,
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bool initiator)
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{
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struct ieee80211_tdls_lnkie *lnkid;
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const u8 *init_addr, *rsp_addr;
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if (initiator) {
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init_addr = sdata->vif.addr;
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rsp_addr = peer;
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} else {
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init_addr = peer;
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rsp_addr = sdata->vif.addr;
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}
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lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
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lnkid->ie_type = WLAN_EID_LINK_ID;
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lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
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memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN);
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memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
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memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
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}
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static void
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ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
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{
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struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
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u8 *pos = (void *)skb_put(skb, 4);
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*pos++ = WLAN_EID_AID;
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*pos++ = 2; /* len */
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put_unaligned_le16(ifmgd->aid, pos);
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}
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/* translate numbering in the WMM parameter IE to the mac80211 notation */
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static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac)
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{
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switch (ac) {
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default:
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WARN_ON_ONCE(1);
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case 0:
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return IEEE80211_AC_BE;
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case 1:
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return IEEE80211_AC_BK;
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case 2:
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return IEEE80211_AC_VI;
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case 3:
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return IEEE80211_AC_VO;
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}
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}
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static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci)
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{
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u8 ret;
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ret = aifsn & 0x0f;
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if (acm)
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ret |= 0x10;
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ret |= (aci << 5) & 0x60;
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return ret;
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}
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static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max)
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{
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return ((ilog2(cw_min + 1) << 0x0) & 0x0f) |
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((ilog2(cw_max + 1) << 0x4) & 0xf0);
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}
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static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb)
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{
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struct ieee80211_wmm_param_ie *wmm;
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struct ieee80211_tx_queue_params *txq;
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int i;
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wmm = (void *)skb_put(skb, sizeof(*wmm));
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memset(wmm, 0, sizeof(*wmm));
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wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
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wmm->len = sizeof(*wmm) - 2;
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wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
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wmm->oui[1] = 0x50;
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wmm->oui[2] = 0xf2;
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wmm->oui_type = 2; /* WME */
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wmm->oui_subtype = 1; /* WME param */
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wmm->version = 1; /* WME ver */
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wmm->qos_info = 0; /* U-APSD not in use */
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/*
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* Use the EDCA parameters defined for the BSS, or default if the AP
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* doesn't support it, as mandated by 802.11-2012 section 10.22.4
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*/
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for (i = 0; i < IEEE80211_NUM_ACS; i++) {
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txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)];
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wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs,
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txq->acm, i);
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wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max);
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wmm->ac[i].txop_limit = cpu_to_le16(txq->txop);
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}
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}
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static void
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ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
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struct sk_buff *skb, const u8 *peer,
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u8 action_code, bool initiator,
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const u8 *extra_ies, size_t extra_ies_len)
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{
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enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
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struct ieee80211_local *local = sdata->local;
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struct ieee80211_supported_band *sband;
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struct ieee80211_sta_ht_cap ht_cap;
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struct ieee80211_sta_vht_cap vht_cap;
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struct sta_info *sta = NULL;
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size_t offset = 0, noffset;
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u8 *pos;
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ieee80211_add_srates_ie(sdata, skb, false, band);
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ieee80211_add_ext_srates_ie(sdata, skb, false, band);
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ieee80211_tdls_add_supp_channels(sdata, skb);
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/* add any custom IEs that go before Extended Capabilities */
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if (extra_ies_len) {
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static const u8 before_ext_cap[] = {
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WLAN_EID_SUPP_RATES,
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WLAN_EID_COUNTRY,
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WLAN_EID_EXT_SUPP_RATES,
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WLAN_EID_SUPPORTED_CHANNELS,
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WLAN_EID_RSN,
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};
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noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
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before_ext_cap,
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ARRAY_SIZE(before_ext_cap),
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offset);
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pos = skb_put(skb, noffset - offset);
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memcpy(pos, extra_ies + offset, noffset - offset);
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offset = noffset;
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}
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ieee80211_tdls_add_ext_capab(local, skb);
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/* add the QoS element if we support it */
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if (local->hw.queues >= IEEE80211_NUM_ACS &&
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action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
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ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */
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/* add any custom IEs that go before HT capabilities */
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if (extra_ies_len) {
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static const u8 before_ht_cap[] = {
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WLAN_EID_SUPP_RATES,
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WLAN_EID_COUNTRY,
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WLAN_EID_EXT_SUPP_RATES,
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WLAN_EID_SUPPORTED_CHANNELS,
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WLAN_EID_RSN,
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WLAN_EID_EXT_CAPABILITY,
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WLAN_EID_QOS_CAPA,
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WLAN_EID_FAST_BSS_TRANSITION,
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WLAN_EID_TIMEOUT_INTERVAL,
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WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
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};
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noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
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before_ht_cap,
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ARRAY_SIZE(before_ht_cap),
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offset);
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pos = skb_put(skb, noffset - offset);
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memcpy(pos, extra_ies + offset, noffset - offset);
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offset = noffset;
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}
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rcu_read_lock();
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/* we should have the peer STA if we're already responding */
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if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
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sta = sta_info_get(sdata, peer);
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if (WARN_ON_ONCE(!sta)) {
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rcu_read_unlock();
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return;
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}
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}
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ieee80211_tdls_add_oper_classes(sdata, skb);
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/*
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* with TDLS we can switch channels, and HT-caps are not necessarily
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* the same on all bands. The specification limits the setup to a
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* single HT-cap, so use the current band for now.
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*/
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sband = local->hw.wiphy->bands[band];
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memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
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if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
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action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
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ht_cap.ht_supported) {
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ieee80211_apply_htcap_overrides(sdata, &ht_cap);
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/* disable SMPS in TDLS initiator */
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ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
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<< IEEE80211_HT_CAP_SM_PS_SHIFT;
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pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
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ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
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} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
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ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) {
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/* disable SMPS in TDLS responder */
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sta->sta.ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
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<< IEEE80211_HT_CAP_SM_PS_SHIFT;
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/* the peer caps are already intersected with our own */
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memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap));
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pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
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ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
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}
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if (ht_cap.ht_supported &&
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(ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
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ieee80211_tdls_add_bss_coex_ie(skb);
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ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
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/* add any custom IEs that go before VHT capabilities */
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if (extra_ies_len) {
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static const u8 before_vht_cap[] = {
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WLAN_EID_SUPP_RATES,
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WLAN_EID_COUNTRY,
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WLAN_EID_EXT_SUPP_RATES,
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WLAN_EID_SUPPORTED_CHANNELS,
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WLAN_EID_RSN,
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WLAN_EID_EXT_CAPABILITY,
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WLAN_EID_QOS_CAPA,
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WLAN_EID_FAST_BSS_TRANSITION,
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WLAN_EID_TIMEOUT_INTERVAL,
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WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
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WLAN_EID_MULTI_BAND,
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};
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noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
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before_vht_cap,
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ARRAY_SIZE(before_vht_cap),
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offset);
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pos = skb_put(skb, noffset - offset);
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memcpy(pos, extra_ies + offset, noffset - offset);
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offset = noffset;
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}
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/* build the VHT-cap similarly to the HT-cap */
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memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
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if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
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action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
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vht_cap.vht_supported) {
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ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
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/* the AID is present only when VHT is implemented */
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if (action_code == WLAN_TDLS_SETUP_REQUEST)
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ieee80211_tdls_add_aid(sdata, skb);
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pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
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ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
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} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
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vht_cap.vht_supported && sta->sta.vht_cap.vht_supported) {
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/* the peer caps are already intersected with our own */
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memcpy(&vht_cap, &sta->sta.vht_cap, sizeof(vht_cap));
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/* the AID is present only when VHT is implemented */
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ieee80211_tdls_add_aid(sdata, skb);
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pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
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ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
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}
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rcu_read_unlock();
|
|
|
|
/* add any remaining IEs */
|
|
if (extra_ies_len) {
|
|
noffset = extra_ies_len;
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, extra_ies + offset, noffset - offset);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, const u8 *peer,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
|
|
size_t offset = 0, noffset;
|
|
struct sta_info *sta, *ap_sta;
|
|
enum ieee80211_band band = ieee80211_get_sdata_band(sdata);
|
|
u8 *pos;
|
|
|
|
rcu_read_lock();
|
|
|
|
sta = sta_info_get(sdata, peer);
|
|
ap_sta = sta_info_get(sdata, ifmgd->bssid);
|
|
if (WARN_ON_ONCE(!sta || !ap_sta)) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
|
|
/* add any custom IEs that go before the QoS IE */
|
|
if (extra_ies_len) {
|
|
static const u8 before_qos[] = {
|
|
WLAN_EID_RSN,
|
|
};
|
|
noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
|
|
before_qos,
|
|
ARRAY_SIZE(before_qos),
|
|
offset);
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, extra_ies + offset, noffset - offset);
|
|
offset = noffset;
|
|
}
|
|
|
|
/* add the QoS param IE if both the peer and we support it */
|
|
if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
|
|
ieee80211_tdls_add_wmm_param_ie(sdata, skb);
|
|
|
|
/* add any custom IEs that go before HT operation */
|
|
if (extra_ies_len) {
|
|
static const u8 before_ht_op[] = {
|
|
WLAN_EID_RSN,
|
|
WLAN_EID_QOS_CAPA,
|
|
WLAN_EID_FAST_BSS_TRANSITION,
|
|
WLAN_EID_TIMEOUT_INTERVAL,
|
|
};
|
|
noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
|
|
before_ht_op,
|
|
ARRAY_SIZE(before_ht_op),
|
|
offset);
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, extra_ies + offset, noffset - offset);
|
|
offset = noffset;
|
|
}
|
|
|
|
/* if HT support is only added in TDLS, we need an HT-operation IE */
|
|
if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) {
|
|
struct ieee80211_chanctx_conf *chanctx_conf =
|
|
rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (!WARN_ON(!chanctx_conf)) {
|
|
pos = skb_put(skb, 2 +
|
|
sizeof(struct ieee80211_ht_operation));
|
|
/* send an empty HT operation IE */
|
|
ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap,
|
|
&chanctx_conf->def, 0);
|
|
}
|
|
}
|
|
|
|
ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
|
|
|
|
/* only include VHT-operation if not on the 2.4GHz band */
|
|
if (band != IEEE80211_BAND_2GHZ && !ap_sta->sta.vht_cap.vht_supported &&
|
|
sta->sta.vht_cap.vht_supported) {
|
|
struct ieee80211_chanctx_conf *chanctx_conf =
|
|
rcu_dereference(sdata->vif.chanctx_conf);
|
|
if (!WARN_ON(!chanctx_conf)) {
|
|
pos = skb_put(skb, 2 +
|
|
sizeof(struct ieee80211_vht_operation));
|
|
ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap,
|
|
&chanctx_conf->def);
|
|
}
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
/* add any remaining IEs */
|
|
if (extra_ies_len) {
|
|
noffset = extra_ies_len;
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, extra_ies + offset, noffset - offset);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, const u8 *peer,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len, u8 oper_class,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
struct ieee80211_tdls_data *tf;
|
|
size_t offset = 0, noffset;
|
|
u8 *pos;
|
|
|
|
if (WARN_ON_ONCE(!chandef))
|
|
return;
|
|
|
|
tf = (void *)skb->data;
|
|
tf->u.chan_switch_req.target_channel =
|
|
ieee80211_frequency_to_channel(chandef->chan->center_freq);
|
|
tf->u.chan_switch_req.oper_class = oper_class;
|
|
|
|
if (extra_ies_len) {
|
|
static const u8 before_lnkie[] = {
|
|
WLAN_EID_SECONDARY_CHANNEL_OFFSET,
|
|
};
|
|
noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
|
|
before_lnkie,
|
|
ARRAY_SIZE(before_lnkie),
|
|
offset);
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, extra_ies + offset, noffset - offset);
|
|
offset = noffset;
|
|
}
|
|
|
|
ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
|
|
|
|
/* add any remaining IEs */
|
|
if (extra_ies_len) {
|
|
noffset = extra_ies_len;
|
|
pos = skb_put(skb, noffset - offset);
|
|
memcpy(pos, extra_ies + offset, noffset - offset);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, const u8 *peer,
|
|
u16 status_code, bool initiator,
|
|
const u8 *extra_ies,
|
|
size_t extra_ies_len)
|
|
{
|
|
if (status_code == 0)
|
|
ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
|
|
|
|
if (extra_ies_len)
|
|
memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
|
|
}
|
|
|
|
static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb, const u8 *peer,
|
|
u8 action_code, u16 status_code,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len, u8 oper_class,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
if (status_code == 0)
|
|
ieee80211_tdls_add_setup_start_ies(sdata, skb, peer,
|
|
action_code,
|
|
initiator,
|
|
extra_ies,
|
|
extra_ies_len);
|
|
break;
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
if (status_code == 0)
|
|
ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer,
|
|
initiator, extra_ies,
|
|
extra_ies_len);
|
|
break;
|
|
case WLAN_TDLS_TEARDOWN:
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
if (extra_ies_len)
|
|
memcpy(skb_put(skb, extra_ies_len), extra_ies,
|
|
extra_ies_len);
|
|
if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
|
|
ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
|
|
break;
|
|
case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
|
|
ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer,
|
|
initiator, extra_ies,
|
|
extra_ies_len,
|
|
oper_class, chandef);
|
|
break;
|
|
case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
|
|
ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer,
|
|
status_code,
|
|
initiator, extra_ies,
|
|
extra_ies_len);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
static int
|
|
ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_tdls_data *tf;
|
|
|
|
tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
|
|
|
|
memcpy(tf->da, peer, ETH_ALEN);
|
|
memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
|
|
tf->ether_type = cpu_to_be16(ETH_P_TDLS);
|
|
tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
|
|
|
|
/* network header is after the ethernet header */
|
|
skb_set_network_header(skb, ETH_HLEN);
|
|
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_SETUP_REQUEST;
|
|
|
|
skb_put(skb, sizeof(tf->u.setup_req));
|
|
tf->u.setup_req.dialog_token = dialog_token;
|
|
tf->u.setup_req.capability =
|
|
cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
|
|
status_code));
|
|
break;
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
|
|
|
|
skb_put(skb, sizeof(tf->u.setup_resp));
|
|
tf->u.setup_resp.status_code = cpu_to_le16(status_code);
|
|
tf->u.setup_resp.dialog_token = dialog_token;
|
|
tf->u.setup_resp.capability =
|
|
cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
|
|
status_code));
|
|
break;
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
|
|
|
|
skb_put(skb, sizeof(tf->u.setup_cfm));
|
|
tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
|
|
tf->u.setup_cfm.dialog_token = dialog_token;
|
|
break;
|
|
case WLAN_TDLS_TEARDOWN:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_TEARDOWN;
|
|
|
|
skb_put(skb, sizeof(tf->u.teardown));
|
|
tf->u.teardown.reason_code = cpu_to_le16(status_code);
|
|
break;
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
|
|
|
|
skb_put(skb, sizeof(tf->u.discover_req));
|
|
tf->u.discover_req.dialog_token = dialog_token;
|
|
break;
|
|
case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
|
|
|
|
skb_put(skb, sizeof(tf->u.chan_switch_req));
|
|
break;
|
|
case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
|
|
tf->category = WLAN_CATEGORY_TDLS;
|
|
tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
|
|
|
|
skb_put(skb, sizeof(tf->u.chan_switch_resp));
|
|
tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_mgmt *mgmt;
|
|
|
|
mgmt = (void *)skb_put(skb, 24);
|
|
memset(mgmt, 0, 24);
|
|
memcpy(mgmt->da, peer, ETH_ALEN);
|
|
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
|
|
memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
|
|
|
|
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
|
|
IEEE80211_STYPE_ACTION);
|
|
|
|
switch (action_code) {
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
|
|
mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
|
|
mgmt->u.action.u.tdls_discover_resp.action_code =
|
|
WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
|
|
mgmt->u.action.u.tdls_discover_resp.dialog_token =
|
|
dialog_token;
|
|
mgmt->u.action.u.tdls_discover_resp.capability =
|
|
cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
|
|
status_code));
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sk_buff *
|
|
ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
|
|
const u8 *peer, u8 action_code,
|
|
u8 dialog_token, u16 status_code,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len, u8 oper_class,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sk_buff *skb;
|
|
int ret;
|
|
|
|
skb = netdev_alloc_skb(sdata->dev,
|
|
local->hw.extra_tx_headroom +
|
|
max(sizeof(struct ieee80211_mgmt),
|
|
sizeof(struct ieee80211_tdls_data)) +
|
|
50 + /* supported rates */
|
|
7 + /* ext capab */
|
|
26 + /* max(WMM-info, WMM-param) */
|
|
2 + max(sizeof(struct ieee80211_ht_cap),
|
|
sizeof(struct ieee80211_ht_operation)) +
|
|
2 + max(sizeof(struct ieee80211_vht_cap),
|
|
sizeof(struct ieee80211_vht_operation)) +
|
|
50 + /* supported channels */
|
|
3 + /* 40/20 BSS coex */
|
|
4 + /* AID */
|
|
4 + /* oper classes */
|
|
extra_ies_len +
|
|
sizeof(struct ieee80211_tdls_lnkie));
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
skb_reserve(skb, local->hw.extra_tx_headroom);
|
|
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
case WLAN_TDLS_TEARDOWN:
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
|
|
case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
|
|
ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
|
|
sdata->dev, peer,
|
|
action_code, dialog_token,
|
|
status_code, skb);
|
|
break;
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
|
|
peer, action_code,
|
|
dialog_token, status_code,
|
|
skb);
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code,
|
|
initiator, extra_ies, extra_ies_len, oper_class,
|
|
chandef);
|
|
return skb;
|
|
|
|
fail:
|
|
dev_kfree_skb(skb);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, u32 peer_capability,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len, u8 oper_class,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct sk_buff *skb = NULL;
|
|
struct sta_info *sta;
|
|
u32 flags = 0;
|
|
int ret = 0;
|
|
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, peer);
|
|
|
|
/* infer the initiator if we can, to support old userspace */
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
if (sta) {
|
|
set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
|
|
sta->sta.tdls_initiator = false;
|
|
}
|
|
/* fall-through */
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
initiator = true;
|
|
break;
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
/*
|
|
* In some testing scenarios, we send a request and response.
|
|
* Make the last packet sent take effect for the initiator
|
|
* value.
|
|
*/
|
|
if (sta) {
|
|
clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
|
|
sta->sta.tdls_initiator = true;
|
|
}
|
|
/* fall-through */
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
initiator = false;
|
|
break;
|
|
case WLAN_TDLS_TEARDOWN:
|
|
case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
|
|
case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
|
|
/* any value is ok */
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
|
|
initiator = true;
|
|
|
|
rcu_read_unlock();
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code,
|
|
dialog_token, status_code,
|
|
initiator, extra_ies,
|
|
extra_ies_len, oper_class,
|
|
chandef);
|
|
if (!skb) {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
|
|
ieee80211_tx_skb(sdata, skb);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
|
|
* we should default to AC_VI.
|
|
*/
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
skb_set_queue_mapping(skb, IEEE80211_AC_BK);
|
|
skb->priority = 2;
|
|
break;
|
|
default:
|
|
skb_set_queue_mapping(skb, IEEE80211_AC_VI);
|
|
skb->priority = 5;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
|
|
* Later, if no ACK is returned from peer, we will re-send the teardown
|
|
* packet through the AP.
|
|
*/
|
|
if ((action_code == WLAN_TDLS_TEARDOWN) &&
|
|
(sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
|
|
bool try_resend; /* Should we keep skb for possible resend */
|
|
|
|
/* If not sending directly to peer - no point in keeping skb */
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, peer);
|
|
try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
|
|
rcu_read_unlock();
|
|
|
|
spin_lock_bh(&sdata->u.mgd.teardown_lock);
|
|
if (try_resend && !sdata->u.mgd.teardown_skb) {
|
|
/* Mark it as requiring TX status callback */
|
|
flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
|
|
IEEE80211_TX_INTFL_MLME_CONN_TX;
|
|
|
|
/*
|
|
* skb is copied since mac80211 will later set
|
|
* properties that might not be the same as the AP,
|
|
* such as encryption, QoS, addresses, etc.
|
|
*
|
|
* No problem if skb_copy() fails, so no need to check.
|
|
*/
|
|
sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
|
|
sdata->u.mgd.orig_teardown_skb = skb;
|
|
}
|
|
spin_unlock_bh(&sdata->u.mgd.teardown_lock);
|
|
}
|
|
|
|
/* disable bottom halves when entering the Tx path */
|
|
local_bh_disable();
|
|
__ieee80211_subif_start_xmit(skb, dev, flags);
|
|
local_bh_enable();
|
|
|
|
return ret;
|
|
|
|
fail:
|
|
dev_kfree_skb(skb);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, u32 peer_capability, bool initiator,
|
|
const u8 *extra_ies, size_t extra_ies_len)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
int ret;
|
|
|
|
mutex_lock(&local->mtx);
|
|
|
|
/* we don't support concurrent TDLS peer setups */
|
|
if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
|
|
!ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
|
|
ret = -EBUSY;
|
|
goto out_unlock;
|
|
}
|
|
|
|
/*
|
|
* make sure we have a STA representing the peer so we drop or buffer
|
|
* non-TDLS-setup frames to the peer. We can't send other packets
|
|
* during setup through the AP path.
|
|
* Allow error packets to be sent - sometimes we don't even add a STA
|
|
* before failing the setup.
|
|
*/
|
|
if (status_code == 0) {
|
|
rcu_read_lock();
|
|
if (!sta_info_get(sdata, peer)) {
|
|
rcu_read_unlock();
|
|
ret = -ENOLINK;
|
|
goto out_unlock;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
ieee80211_flush_queues(local, sdata, false);
|
|
memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);
|
|
mutex_unlock(&local->mtx);
|
|
|
|
/* we cannot take the mutex while preparing the setup packet */
|
|
ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code,
|
|
dialog_token, status_code,
|
|
peer_capability, initiator,
|
|
extra_ies, extra_ies_len, 0,
|
|
NULL);
|
|
if (ret < 0) {
|
|
mutex_lock(&local->mtx);
|
|
eth_zero_addr(sdata->u.mgd.tdls_peer);
|
|
mutex_unlock(&local->mtx);
|
|
return ret;
|
|
}
|
|
|
|
ieee80211_queue_delayed_work(&sdata->local->hw,
|
|
&sdata->u.mgd.tdls_peer_del_work,
|
|
TDLS_PEER_SETUP_TIMEOUT);
|
|
return 0;
|
|
|
|
out_unlock:
|
|
mutex_unlock(&local->mtx);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, u32 peer_capability,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
int ret;
|
|
|
|
/*
|
|
* No packets can be transmitted to the peer via the AP during setup -
|
|
* the STA is set as a TDLS peer, but is not authorized.
|
|
* During teardown, we prevent direct transmissions by stopping the
|
|
* queues and flushing all direct packets.
|
|
*/
|
|
ieee80211_stop_vif_queues(local, sdata,
|
|
IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
|
|
ieee80211_flush_queues(local, sdata, false);
|
|
|
|
ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code,
|
|
dialog_token, status_code,
|
|
peer_capability, initiator,
|
|
extra_ies, extra_ies_len, 0,
|
|
NULL);
|
|
if (ret < 0)
|
|
sdata_err(sdata, "Failed sending TDLS teardown packet %d\n",
|
|
ret);
|
|
|
|
/*
|
|
* Remove the STA AUTH flag to force further traffic through the AP. If
|
|
* the STA was unreachable, it was already removed.
|
|
*/
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, peer);
|
|
if (sta)
|
|
clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
|
|
rcu_read_unlock();
|
|
|
|
ieee80211_wake_vif_queues(local, sdata,
|
|
IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, u8 action_code, u8 dialog_token,
|
|
u16 status_code, u32 peer_capability,
|
|
bool initiator, const u8 *extra_ies,
|
|
size_t extra_ies_len)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
int ret;
|
|
|
|
if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
|
|
return -ENOTSUPP;
|
|
|
|
/* make sure we are in managed mode, and associated */
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION ||
|
|
!sdata->u.mgd.associated)
|
|
return -EINVAL;
|
|
|
|
switch (action_code) {
|
|
case WLAN_TDLS_SETUP_REQUEST:
|
|
case WLAN_TDLS_SETUP_RESPONSE:
|
|
ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code,
|
|
dialog_token, status_code,
|
|
peer_capability, initiator,
|
|
extra_ies, extra_ies_len);
|
|
break;
|
|
case WLAN_TDLS_TEARDOWN:
|
|
ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer,
|
|
action_code, dialog_token,
|
|
status_code,
|
|
peer_capability, initiator,
|
|
extra_ies, extra_ies_len);
|
|
break;
|
|
case WLAN_TDLS_DISCOVERY_REQUEST:
|
|
/*
|
|
* Protect the discovery so we can hear the TDLS discovery
|
|
* response frame. It is transmitted directly and not buffered
|
|
* by the AP.
|
|
*/
|
|
drv_mgd_protect_tdls_discover(sdata->local, sdata);
|
|
/* fall-through */
|
|
case WLAN_TDLS_SETUP_CONFIRM:
|
|
case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
|
|
/* no special handling */
|
|
ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
|
|
action_code,
|
|
dialog_token,
|
|
status_code,
|
|
peer_capability,
|
|
initiator, extra_ies,
|
|
extra_ies_len, 0, NULL);
|
|
break;
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n",
|
|
action_code, peer, ret);
|
|
return ret;
|
|
}
|
|
|
|
int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *peer, enum nl80211_tdls_operation oper)
|
|
{
|
|
struct sta_info *sta;
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
int ret;
|
|
|
|
if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
|
|
return -ENOTSUPP;
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_STATION)
|
|
return -EINVAL;
|
|
|
|
switch (oper) {
|
|
case NL80211_TDLS_ENABLE_LINK:
|
|
case NL80211_TDLS_DISABLE_LINK:
|
|
break;
|
|
case NL80211_TDLS_TEARDOWN:
|
|
case NL80211_TDLS_SETUP:
|
|
case NL80211_TDLS_DISCOVERY_REQ:
|
|
/* We don't support in-driver setup/teardown/discovery */
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
mutex_lock(&local->mtx);
|
|
tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);
|
|
|
|
switch (oper) {
|
|
case NL80211_TDLS_ENABLE_LINK:
|
|
rcu_read_lock();
|
|
sta = sta_info_get(sdata, peer);
|
|
if (!sta) {
|
|
rcu_read_unlock();
|
|
ret = -ENOLINK;
|
|
break;
|
|
}
|
|
|
|
set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
|
|
rcu_read_unlock();
|
|
|
|
WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) ||
|
|
!ether_addr_equal(sdata->u.mgd.tdls_peer, peer));
|
|
ret = 0;
|
|
break;
|
|
case NL80211_TDLS_DISABLE_LINK:
|
|
/*
|
|
* The teardown message in ieee80211_tdls_mgmt_teardown() was
|
|
* created while the queues were stopped, so it might still be
|
|
* pending. Before flushing the queues we need to be sure the
|
|
* message is handled by the tasklet handling pending messages,
|
|
* otherwise we might start destroying the station before
|
|
* sending the teardown packet.
|
|
* Note that this only forces the tasklet to flush pendings -
|
|
* not to stop the tasklet from rescheduling itself.
|
|
*/
|
|
tasklet_kill(&local->tx_pending_tasklet);
|
|
/* flush a potentially queued teardown packet */
|
|
ieee80211_flush_queues(local, sdata, false);
|
|
|
|
ret = sta_info_destroy_addr(sdata, peer);
|
|
break;
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
|
|
cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work);
|
|
eth_zero_addr(sdata->u.mgd.tdls_peer);
|
|
}
|
|
|
|
mutex_unlock(&local->mtx);
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
|
|
enum nl80211_tdls_operation oper,
|
|
u16 reason_code, gfp_t gfp)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
|
|
|
|
if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) {
|
|
sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n",
|
|
oper);
|
|
return;
|
|
}
|
|
|
|
cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp);
|
|
}
|
|
EXPORT_SYMBOL(ieee80211_tdls_oper_request);
|
|
|
|
static void
|
|
iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout)
|
|
{
|
|
struct ieee80211_ch_switch_timing *ch_sw;
|
|
|
|
*buf++ = WLAN_EID_CHAN_SWITCH_TIMING;
|
|
*buf++ = sizeof(struct ieee80211_ch_switch_timing);
|
|
|
|
ch_sw = (void *)buf;
|
|
ch_sw->switch_time = cpu_to_le16(switch_time);
|
|
ch_sw->switch_timeout = cpu_to_le16(switch_timeout);
|
|
}
|
|
|
|
/* find switch timing IE in SKB ready for Tx */
|
|
static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_tdls_data *tf;
|
|
const u8 *ie_start;
|
|
|
|
/*
|
|
* Get the offset for the new location of the switch timing IE.
|
|
* The SKB network header will now point to the "payload_type"
|
|
* element of the TDLS data frame struct.
|
|
*/
|
|
tf = container_of(skb->data + skb_network_offset(skb),
|
|
struct ieee80211_tdls_data, payload_type);
|
|
ie_start = tf->u.chan_switch_req.variable;
|
|
return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start,
|
|
skb->len - (ie_start - skb->data));
|
|
}
|
|
|
|
static struct sk_buff *
|
|
ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
|
|
struct cfg80211_chan_def *chandef,
|
|
u32 *ch_sw_tm_ie_offset)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
|
|
2 + sizeof(struct ieee80211_ch_switch_timing)];
|
|
int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing);
|
|
u8 *pos = extra_ies;
|
|
struct sk_buff *skb;
|
|
|
|
/*
|
|
* if chandef points to a wide channel add a Secondary-Channel
|
|
* Offset information element
|
|
*/
|
|
if (chandef->width == NL80211_CHAN_WIDTH_40) {
|
|
struct ieee80211_sec_chan_offs_ie *sec_chan_ie;
|
|
bool ht40plus;
|
|
|
|
*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
|
|
*pos++ = sizeof(*sec_chan_ie);
|
|
sec_chan_ie = (void *)pos;
|
|
|
|
ht40plus = cfg80211_get_chandef_type(chandef) ==
|
|
NL80211_CHAN_HT40PLUS;
|
|
sec_chan_ie->sec_chan_offs = ht40plus ?
|
|
IEEE80211_HT_PARAM_CHA_SEC_ABOVE :
|
|
IEEE80211_HT_PARAM_CHA_SEC_BELOW;
|
|
pos += sizeof(*sec_chan_ie);
|
|
|
|
extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
|
|
}
|
|
|
|
/* just set the values to 0, this is a template */
|
|
iee80211_tdls_add_ch_switch_timing(pos, 0, 0);
|
|
|
|
skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
|
|
WLAN_TDLS_CHANNEL_SWITCH_REQUEST,
|
|
0, 0, !sta->sta.tdls_initiator,
|
|
extra_ies, extra_ies_len,
|
|
oper_class, chandef);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
skb = ieee80211_build_data_template(sdata, skb, 0);
|
|
if (IS_ERR(skb)) {
|
|
tdls_dbg(sdata, "Failed building TDLS channel switch frame\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (ch_sw_tm_ie_offset) {
|
|
const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);
|
|
|
|
if (!tm_ie) {
|
|
tdls_dbg(sdata, "No switch timing IE in TDLS switch\n");
|
|
dev_kfree_skb_any(skb);
|
|
return NULL;
|
|
}
|
|
|
|
*ch_sw_tm_ie_offset = tm_ie - skb->data;
|
|
}
|
|
|
|
tdls_dbg(sdata,
|
|
"TDLS channel switch request template for %pM ch %d width %d\n",
|
|
sta->sta.addr, chandef->chan->center_freq, chandef->width);
|
|
return skb;
|
|
}
|
|
|
|
int
|
|
ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
|
|
const u8 *addr, u8 oper_class,
|
|
struct cfg80211_chan_def *chandef)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
struct sk_buff *skb = NULL;
|
|
u32 ch_sw_tm_ie;
|
|
int ret;
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get(sdata, addr);
|
|
if (!sta) {
|
|
tdls_dbg(sdata,
|
|
"Invalid TDLS peer %pM for channel switch request\n",
|
|
addr);
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) {
|
|
tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n",
|
|
addr);
|
|
ret = -ENOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef,
|
|
&ch_sw_tm_ie);
|
|
if (!skb) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class,
|
|
chandef, skb, ch_sw_tm_ie);
|
|
if (!ret)
|
|
set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
|
|
|
|
out:
|
|
mutex_unlock(&local->sta_mtx);
|
|
dev_kfree_skb_any(skb);
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
|
|
struct net_device *dev,
|
|
const u8 *addr)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct sta_info *sta;
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get(sdata, addr);
|
|
if (!sta) {
|
|
tdls_dbg(sdata,
|
|
"Invalid TDLS peer %pM for channel switch cancel\n",
|
|
addr);
|
|
goto out;
|
|
}
|
|
|
|
if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
|
|
tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n",
|
|
addr);
|
|
goto out;
|
|
}
|
|
|
|
drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
|
|
clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
|
|
|
|
out:
|
|
mutex_unlock(&local->sta_mtx);
|
|
}
|
|
|
|
static struct sk_buff *
|
|
ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
|
|
u32 *ch_sw_tm_ie_offset)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
struct sk_buff *skb;
|
|
u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
|
|
|
|
/* initial timing are always zero in the template */
|
|
iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);
|
|
|
|
skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
|
|
WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
|
|
0, 0, !sta->sta.tdls_initiator,
|
|
extra_ies, sizeof(extra_ies), 0, NULL);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
skb = ieee80211_build_data_template(sdata, skb, 0);
|
|
if (IS_ERR(skb)) {
|
|
tdls_dbg(sdata,
|
|
"Failed building TDLS channel switch resp frame\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (ch_sw_tm_ie_offset) {
|
|
const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);
|
|
|
|
if (!tm_ie) {
|
|
tdls_dbg(sdata,
|
|
"No switch timing IE in TDLS switch resp\n");
|
|
dev_kfree_skb_any(skb);
|
|
return NULL;
|
|
}
|
|
|
|
*ch_sw_tm_ie_offset = tm_ie - skb->data;
|
|
}
|
|
|
|
tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n",
|
|
sta->sta.addr);
|
|
return skb;
|
|
}
|
|
|
|
static int
|
|
ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee802_11_elems elems;
|
|
struct sta_info *sta;
|
|
struct ieee80211_tdls_data *tf = (void *)skb->data;
|
|
bool local_initiator;
|
|
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
|
|
int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable);
|
|
struct ieee80211_tdls_ch_sw_params params = {};
|
|
int ret;
|
|
|
|
params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
|
|
params.timestamp = rx_status->device_timestamp;
|
|
|
|
if (skb->len < baselen) {
|
|
tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n",
|
|
skb->len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get(sdata, tf->sa);
|
|
if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
|
|
tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
|
|
tf->sa);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.sta = &sta->sta;
|
|
params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code);
|
|
if (params.status != 0) {
|
|
ret = 0;
|
|
goto call_drv;
|
|
}
|
|
|
|
ieee802_11_parse_elems(tf->u.chan_switch_resp.variable,
|
|
skb->len - baselen, false, &elems);
|
|
if (elems.parse_error) {
|
|
tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!elems.ch_sw_timing || !elems.lnk_id) {
|
|
tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* validate the initiator is set correctly */
|
|
local_initiator =
|
|
!memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
|
|
if (local_initiator == sta->sta.tdls_initiator) {
|
|
tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time);
|
|
params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout);
|
|
|
|
params.tmpl_skb =
|
|
ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie);
|
|
if (!params.tmpl_skb) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
call_drv:
|
|
drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms);
|
|
|
|
tdls_dbg(sdata,
|
|
"TDLS channel switch response received from %pM status %d\n",
|
|
tf->sa, params.status);
|
|
|
|
out:
|
|
mutex_unlock(&local->sta_mtx);
|
|
dev_kfree_skb_any(params.tmpl_skb);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee802_11_elems elems;
|
|
struct cfg80211_chan_def chandef;
|
|
struct ieee80211_channel *chan;
|
|
enum nl80211_channel_type chan_type;
|
|
int freq;
|
|
u8 target_channel, oper_class;
|
|
bool local_initiator;
|
|
struct sta_info *sta;
|
|
enum ieee80211_band band;
|
|
struct ieee80211_tdls_data *tf = (void *)skb->data;
|
|
struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
|
|
int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable);
|
|
struct ieee80211_tdls_ch_sw_params params = {};
|
|
int ret = 0;
|
|
|
|
params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
|
|
params.timestamp = rx_status->device_timestamp;
|
|
|
|
if (skb->len < baselen) {
|
|
tdls_dbg(sdata, "TDLS channel switch req too short: %d\n",
|
|
skb->len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
target_channel = tf->u.chan_switch_req.target_channel;
|
|
oper_class = tf->u.chan_switch_req.oper_class;
|
|
|
|
/*
|
|
* We can't easily infer the channel band. The operating class is
|
|
* ambiguous - there are multiple tables (US/Europe/JP/Global). The
|
|
* solution here is to treat channels with number >14 as 5GHz ones,
|
|
* and specifically check for the (oper_class, channel) combinations
|
|
* where this doesn't hold. These are thankfully unique according to
|
|
* IEEE802.11-2012.
|
|
* We consider only the 2GHz and 5GHz bands and 20MHz+ channels as
|
|
* valid here.
|
|
*/
|
|
if ((oper_class == 112 || oper_class == 2 || oper_class == 3 ||
|
|
oper_class == 4 || oper_class == 5 || oper_class == 6) &&
|
|
target_channel < 14)
|
|
band = IEEE80211_BAND_5GHZ;
|
|
else
|
|
band = target_channel < 14 ? IEEE80211_BAND_2GHZ :
|
|
IEEE80211_BAND_5GHZ;
|
|
|
|
freq = ieee80211_channel_to_frequency(target_channel, band);
|
|
if (freq == 0) {
|
|
tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n",
|
|
target_channel);
|
|
return -EINVAL;
|
|
}
|
|
|
|
chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
|
|
if (!chan) {
|
|
tdls_dbg(sdata,
|
|
"Unsupported channel for TDLS chan switch: %d\n",
|
|
target_channel);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ieee802_11_parse_elems(tf->u.chan_switch_req.variable,
|
|
skb->len - baselen, false, &elems);
|
|
if (elems.parse_error) {
|
|
tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!elems.ch_sw_timing || !elems.lnk_id) {
|
|
tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&local->sta_mtx);
|
|
sta = sta_info_get(sdata, tf->sa);
|
|
if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
|
|
tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
|
|
tf->sa);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.sta = &sta->sta;
|
|
|
|
/* validate the initiator is set correctly */
|
|
local_initiator =
|
|
!memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
|
|
if (local_initiator == sta->sta.tdls_initiator) {
|
|
tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!sta->sta.ht_cap.ht_supported) {
|
|
chan_type = NL80211_CHAN_NO_HT;
|
|
} else if (!elems.sec_chan_offs) {
|
|
chan_type = NL80211_CHAN_HT20;
|
|
} else {
|
|
switch (elems.sec_chan_offs->sec_chan_offs) {
|
|
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
|
|
chan_type = NL80211_CHAN_HT40PLUS;
|
|
break;
|
|
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
|
|
chan_type = NL80211_CHAN_HT40MINUS;
|
|
break;
|
|
default:
|
|
chan_type = NL80211_CHAN_HT20;
|
|
break;
|
|
}
|
|
}
|
|
|
|
cfg80211_chandef_create(&chandef, chan, chan_type);
|
|
params.chandef = &chandef;
|
|
|
|
params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time);
|
|
params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout);
|
|
|
|
params.tmpl_skb =
|
|
ieee80211_tdls_ch_sw_resp_tmpl_get(sta,
|
|
¶ms.ch_sw_tm_ie);
|
|
if (!params.tmpl_skb) {
|
|
ret = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms);
|
|
|
|
tdls_dbg(sdata,
|
|
"TDLS ch switch request received from %pM ch %d width %d\n",
|
|
tf->sa, params.chandef->chan->center_freq,
|
|
params.chandef->width);
|
|
out:
|
|
mutex_unlock(&local->sta_mtx);
|
|
dev_kfree_skb_any(params.tmpl_skb);
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_tdls_data *tf = (void *)skb->data;
|
|
struct wiphy *wiphy = sdata->local->hw.wiphy;
|
|
|
|
/* make sure the driver supports it */
|
|
if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
|
|
return;
|
|
|
|
/* we want to access the entire packet */
|
|
if (skb_linearize(skb))
|
|
return;
|
|
/*
|
|
* The packet/size was already validated by mac80211 Rx path, only look
|
|
* at the action type.
|
|
*/
|
|
switch (tf->action_code) {
|
|
case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
|
|
ieee80211_process_tdls_channel_switch_req(sdata, skb);
|
|
break;
|
|
case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
|
|
ieee80211_process_tdls_channel_switch_resp(sdata, skb);
|
|
break;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return;
|
|
}
|
|
}
|