rtl8812au/core/rtw_ft.c

/******************************************************************************
 *
 * Copyright(c) 2007 - 2017 Realtek Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 *****************************************************************************/

#include <drv_types.h>
#include <hal_data.h>

#ifdef CONFIG_RTW_80211R

#ifndef RTW_FT_DBG
	#define RTW_FT_DBG	0
#endif
#if RTW_FT_DBG
	#define RTW_FT_INFO(fmt, arg...)	\
		RTW_INFO(fmt, arg)
	#define RTW_FT_DUMP(str, data, len)	\
		RTW_INFO_DUMP(str, data, len)
#else
	#define RTW_FT_INFO(fmt, arg...) do {} while (0)
	#define RTW_FT_DUMP(str, data, len) do {} while (0)
#endif

void rtw_ft_info_init(struct ft_roam_info *pft)
{
	_rtw_memset(pft, 0, sizeof(struct ft_roam_info));
	pft->ft_flags = 0
		| RTW_FT_EN
	/*	| RTW_FT_OTD_EN */
#ifdef CONFIG_RTW_BTM_ROAM
		| RTW_FT_BTM_ROAM
#endif
		;
	pft->ft_updated_bcn = _FALSE;
	RTW_FT_INFO("%s : ft_flags=0x%02x\n", __func__, pft->ft_flags);
}

ssize_t rtw_ft_proc_flags_set(struct file *file,
	const char __user *buffer, size_t count, loff_t *pos, void *data)
{
	struct net_device *dev = data;
	_adapter *adapter = (_adapter *)rtw_netdev_priv(dev);

	char tmp[32];
	u8 flags;

	if (count < 1)
		return -EFAULT;

	if (count > sizeof(tmp)) {
		rtw_warn_on(1);
		return -EFAULT;
	}

	if (buffer && !copy_from_user(tmp, buffer, count)) {
		int num = sscanf(tmp, "%hhx", &flags);
		if (num == 1)
			adapter->mlmepriv.ft_roam.ft_flags = flags;
	}

	return count;

}

int rtw_ft_proc_flags_get(struct seq_file *m, void *v)
{
	struct net_device *dev = m->private;
	_adapter *adapter = (_adapter *)rtw_netdev_priv(dev);

	RTW_PRINT_SEL(m, "0x%02x\n", adapter->mlmepriv.ft_roam.ft_flags);

	return 0;
}

u8 rtw_ft_chk_roaming_candidate(
	_adapter *padapter, struct wlan_network *competitor)
{
	u8 *pmdie;
	u32 mdie_len = 0;
	struct ft_roam_info *pft_roam = &(padapter->mlmepriv.ft_roam);

	if (!(pmdie = rtw_get_ie(&competitor->network.IEs[12],
			_MDIE_, &mdie_len, competitor->network.IELength-12))) {
		RTW_INFO("FT : MDIE not foud in competitor!\n");
		return _FALSE;
	}	

	if (!_rtw_memcmp(&pft_roam->mdid, (pmdie+2), 2)) {
		RTW_INFO("FT : unmatched MDIE!\n");
		return _FALSE;
	}

	/*The candidate don't support over-the-DS*/
	if (rtw_ft_valid_otd_candidate(padapter, pmdie)) {
		RTW_INFO("FT: ignore the candidate("
			MAC_FMT ") for over-the-DS\n", 
			MAC_ARG(competitor->network.MacAddress));
		/*	rtw_ft_clr_flags(padapter, RTW_FT_PEER_OTD_EN); */
		return _FALSE;	
	}

	if (rtw_ft_chk_flags(padapter, RTW_FT_TEST_RSSI_ROAM)) {
		if (!_rtw_memcmp(padapter->mlmepriv.cur_network.network.MacAddress, 
			competitor->network.MacAddress, ETH_ALEN) ) {
			competitor->network.Rssi +=20;
			RTW_FT_INFO("%s : update "MAC_FMT" RSSI to %d for RTW_FT_TEST_RSSI_ROAM\n",
				__func__, MAC_ARG(competitor->network.MacAddress),
				(int)competitor->network.Rssi);
			rtw_ft_clr_flags(padapter, RTW_FT_TEST_RSSI_ROAM);
		}
	}	

	return _TRUE;
}

void rtw_ft_update_stainfo(_adapter *padapter, WLAN_BSSID_EX *pnetwork)
{
	struct sta_priv		*pstapriv = &padapter->stapriv;
	struct sta_info		*psta = NULL;

	psta = rtw_get_stainfo(pstapriv, pnetwork->MacAddress);
	if (psta == NULL)
		psta = rtw_alloc_stainfo(pstapriv, pnetwork->MacAddress);

	if (padapter->securitypriv.dot11AuthAlgrthm == dot11AuthAlgrthm_8021X) {

		padapter->securitypriv.binstallGrpkey = _FALSE;
		padapter->securitypriv.busetkipkey = _FALSE;
		padapter->securitypriv.bgrpkey_handshake = _FALSE;

		psta->ieee8021x_blocked = _TRUE;
		psta->dot118021XPrivacy = padapter->securitypriv.dot11PrivacyAlgrthm;

		_rtw_memset((u8 *)&psta->dot118021x_UncstKey, 0, sizeof(union Keytype));
		_rtw_memset((u8 *)&psta->dot11tkiprxmickey, 0, sizeof(union Keytype));
		_rtw_memset((u8 *)&psta->dot11tkiptxmickey, 0, sizeof(union Keytype));
	}

}

void rtw_ft_reassoc_event_callback(_adapter *padapter, u8 *pbuf)
{
	struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
	struct stassoc_event *pstassoc = (struct stassoc_event *)pbuf;
	struct ft_roam_info *pft_roam = &(pmlmepriv->ft_roam);
	struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
	struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
	WLAN_BSSID_EX *pnetwork = (WLAN_BSSID_EX *)&(pmlmeinfo->network);
	struct cfg80211_ft_event_params ft_evt_parms;
	_irqL irqL;

	_rtw_memset(&ft_evt_parms, 0, sizeof(ft_evt_parms));
	rtw_ft_update_stainfo(padapter, pnetwork);
	ft_evt_parms.ies_len = pft_roam->ft_event.ies_len;
	ft_evt_parms.ies =  rtw_zmalloc(ft_evt_parms.ies_len);
	if (ft_evt_parms.ies)
		_rtw_memcpy((void *)ft_evt_parms.ies, pft_roam->ft_event.ies, ft_evt_parms.ies_len);
	 else
		goto err_2;

	ft_evt_parms.target_ap = rtw_zmalloc(ETH_ALEN);
	if (ft_evt_parms.target_ap)
		_rtw_memcpy((void *)ft_evt_parms.target_ap, pstassoc->macaddr, ETH_ALEN);
	else
		goto err_1;

	ft_evt_parms.ric_ies = pft_roam->ft_event.ric_ies;
	ft_evt_parms.ric_ies_len = pft_roam->ft_event.ric_ies_len;

	/* It's a KERNEL issue between v4.11 ~ v4.16, 
	* <= v4.10, NLMSG_DEFAULT_SIZE is used for nlmsg_new().
	* v4.11 ~ v4.16, only used "100 + >ric_ies_len" for nlmsg_new() 
	*	even then DRIVER don't support RIC.
	* >= v4.17, issue should correct as "100 + ies_len + ric_ies_len".
	*/	
	#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)) && \
	(LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)))
		if (!ft_evt_parms.ric_ies_len)
			ft_evt_parms.ric_ies_len = ft_evt_parms.ies_len;
		else 
			ft_evt_parms.ric_ies_len += ft_evt_parms.ies_len;	
	#endif	
	
	rtw_ft_lock_set_status(padapter, RTW_FT_AUTHENTICATED_STA, &irqL);
	rtw_cfg80211_ft_event(padapter, &ft_evt_parms);
	RTW_INFO("%s: to "MAC_FMT"\n", __func__, MAC_ARG(ft_evt_parms.target_ap));

	rtw_mfree((u8 *)pft_roam->ft_event.target_ap, ETH_ALEN);
err_1:
	rtw_mfree((u8 *)ft_evt_parms.ies, ft_evt_parms.ies_len);
err_2:
	return;
}

void rtw_ft_validate_akm_type(_adapter  *padapter,
	struct wlan_network *pnetwork)
{
	struct security_priv *psecuritypriv = &(padapter->securitypriv);
	struct ft_roam_info *pft_roam = &(padapter->mlmepriv.ft_roam);
	u32 tmp_len;
	u8 *ptmp;

	/*IEEE802.11-2012 Std. Table 8-101-AKM suite selectors*/
	if (rtw_ft_valid_akm(padapter, psecuritypriv->rsn_akm_suite_type)) {
		ptmp = rtw_get_ie(&pnetwork->network.IEs[12], 
				_MDIE_, &tmp_len, (pnetwork->network.IELength-12));
		if (ptmp) {
			pft_roam->mdid = *(u16 *)(ptmp+2);
			pft_roam->ft_cap = *(ptmp+4);

			RTW_INFO("FT: target " MAC_FMT " mdid=(0x%2x), capacity=(0x%2x)\n", 
				MAC_ARG(pnetwork->network.MacAddress), pft_roam->mdid, pft_roam->ft_cap);
			rtw_ft_set_flags(padapter, RTW_FT_PEER_EN);
			RTW_FT_INFO("%s : peer support FTOTA(0x%02x)\n", __func__, pft_roam->ft_flags);

			if (rtw_ft_otd_roam_en(padapter)) {
				rtw_ft_set_flags(padapter, RTW_FT_PEER_OTD_EN);
				RTW_FT_INFO("%s : peer support FTOTD(0x%02x)\n", __func__, pft_roam->ft_flags);
			}
		} else {
			/* Don't use FT roaming if target AP cannot support FT */
			rtw_ft_clr_flags(padapter, (RTW_FT_PEER_EN|RTW_FT_PEER_OTD_EN));
			rtw_ft_reset_status(padapter);
		}
	} else {
		/* It could be a non-FT connection */
		rtw_ft_clr_flags(padapter, (RTW_FT_PEER_EN|RTW_FT_PEER_OTD_EN));
		rtw_ft_reset_status(padapter);
	}	

	RTW_FT_INFO("%s : ft_flags=0x%02x\n", __func__, pft_roam->ft_flags);
}

void rtw_ft_update_bcn(_adapter *padapter, union recv_frame *precv_frame)
{
	struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;
	struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
	u8 *pframe = precv_frame->u.hdr.rx_data;
	uint len = precv_frame->u.hdr.len;
	WLAN_BSSID_EX *pbss;

	if (rtw_ft_chk_status(padapter,RTW_FT_ASSOCIATED_STA) 
		&& (pmlmepriv->ft_roam.ft_updated_bcn == _FALSE)) {
		pbss = (WLAN_BSSID_EX*)rtw_malloc(sizeof(WLAN_BSSID_EX));
		if (pbss) {
			if (collect_bss_info(padapter, precv_frame, pbss) == _SUCCESS) {
				struct beacon_keys recv_beacon;

				update_network(&(pmlmepriv->cur_network.network), pbss, padapter, _TRUE);
				/* Move into rtw_get_bcn_keys */
				/* rtw_get_bcn_info(&(pmlmepriv->cur_network)); */
				
				/* update bcn keys */
				if (rtw_get_bcn_keys(padapter, pframe, len, &recv_beacon) == _TRUE) {
					RTW_FT_INFO("%s: beacon keys ready\n", __func__);
					_rtw_memcpy(&pmlmepriv->cur_beacon_keys,
						&recv_beacon, sizeof(recv_beacon));
					if (is_hidden_ssid(recv_beacon.ssid, recv_beacon.ssid_len)) {
						_rtw_memcpy(pmlmepriv->cur_beacon_keys.ssid, pmlmeinfo->network.Ssid.Ssid, IW_ESSID_MAX_SIZE);
						pmlmepriv->cur_beacon_keys.ssid_len = pmlmeinfo->network.Ssid.SsidLength;
					}
				} else {
					RTW_ERR("%s: get beacon keys failed\n", __func__);
					_rtw_memset(&pmlmepriv->cur_beacon_keys, 0, sizeof(recv_beacon));
				}
				#ifdef CONFIG_BCN_CNT_CONFIRM_HDL
				pmlmepriv->new_beacon_cnts = 0;
				#endif
			}
			rtw_mfree((u8*)pbss, sizeof(WLAN_BSSID_EX));
		}

		/* check the vendor of the assoc AP */
		pmlmeinfo->assoc_AP_vendor = 	
			check_assoc_AP(pframe+sizeof(struct rtw_ieee80211_hdr_3addr),
				(len - sizeof(struct rtw_ieee80211_hdr_3addr)));

		/* update TSF Value */
		update_TSF(pmlmeext, pframe, len);
		pmlmeext->bcn_cnt = 0;
		pmlmeext->last_bcn_cnt = 0;
		pmlmepriv->ft_roam.ft_updated_bcn = _TRUE;
	}
}

void rtw_ft_start_clnt_join(_adapter *padapter)
{
	struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
	struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
	struct	mlme_priv *pmlmepriv = &(padapter->mlmepriv);
	struct ft_roam_info *pft_roam = &(pmlmepriv->ft_roam);

	if (rtw_ft_otd_roam(padapter)) {
		pmlmeinfo->state = WIFI_FW_AUTH_SUCCESS | WIFI_FW_STATION_STATE;
		pft_roam->ft_event.ies =
			(pft_roam->ft_action + sizeof(struct rtw_ieee80211_hdr_3addr) + 16);
		pft_roam->ft_event.ies_len =
			(pft_roam->ft_action_len - sizeof(struct rtw_ieee80211_hdr_3addr));

		/*Not support RIC*/
		pft_roam->ft_event.ric_ies =  NULL;
		pft_roam->ft_event.ric_ies_len = 0;
		rtw_ft_report_evt(padapter);
		return;
	}

	pmlmeinfo->state = WIFI_FW_AUTH_NULL | WIFI_FW_STATION_STATE;
	start_clnt_auth(padapter);
}

u8 rtw_ft_update_rsnie(
	_adapter *padapter, u8 bwrite, 
	struct pkt_attrib *pattrib, u8 **pframe)
{
	struct ft_roam_info *pft_roam = &(padapter->mlmepriv.ft_roam);
	u8 *pie;
	u32 len;

	pie = rtw_get_ie(pft_roam->updated_ft_ies, EID_WPA2, &len, 
			pft_roam->updated_ft_ies_len);

	if (!bwrite)
		return (pie)?_SUCCESS:_FAIL;
	
	if (pie) {
		*pframe = rtw_set_ie(((u8 *)*pframe), EID_WPA2, len, 
						pie+2, &(pattrib->pktlen));
	} else
		return _FAIL;

	return _SUCCESS;	
}

static u8 rtw_ft_update_mdie(
	_adapter *padapter, struct pkt_attrib *pattrib, u8 **pframe)
{
	struct ft_roam_info *pft_roam = &(padapter->mlmepriv.ft_roam);
	u8 *pie, mdie[3];
	u32 len = 3;

	if (rtw_ft_roam(padapter)) {
		if ((pie = rtw_get_ie(pft_roam->updated_ft_ies, _MDIE_, 
				&len, pft_roam->updated_ft_ies_len))) {
			pie = (pie + 2); /* ignore md-id & length */
		} else 
			return _FAIL;
	} else {
		*((u16 *)&mdie[0]) = pft_roam->mdid;
		mdie[2] = pft_roam->ft_cap;
		pie = &mdie[0];
	}

	*pframe = rtw_set_ie(((u8 *)*pframe), _MDIE_, len , pie, &(pattrib->pktlen));
	return _SUCCESS;	
}

static u8 rtw_ft_update_ftie(
	_adapter *padapter, struct pkt_attrib *pattrib, u8 **pframe)
{
	struct ft_roam_info *pft_roam = &(padapter->mlmepriv.ft_roam);
	u8 *pie;
	u32 len;

	if ((pie = rtw_get_ie(pft_roam->updated_ft_ies, _FTIE_, &len, 
				pft_roam->updated_ft_ies_len)) != NULL) {
		*pframe = rtw_set_ie(*pframe, _FTIE_, len , 
					(pie+2), &(pattrib->pktlen));
	} else
		return _FAIL;

	return _SUCCESS;	
}

void rtw_ft_build_auth_req_ies(_adapter *padapter, 
	struct pkt_attrib *pattrib, u8 **pframe)
{
	u8 ftie_append = _TRUE;

	if (!pattrib || !(*pframe))
		return;

	if (!rtw_ft_roam(padapter))
		return;

	ftie_append = rtw_ft_update_rsnie(padapter, _TRUE, pattrib, pframe);
	rtw_ft_update_mdie(padapter, pattrib, pframe);
	if (ftie_append)
		rtw_ft_update_ftie(padapter, pattrib, pframe);
}

void rtw_ft_build_assoc_req_ies(_adapter *padapter, 
	u8 is_reassoc, struct pkt_attrib *pattrib, u8 **pframe)
{
	if (!pattrib || !(*pframe))
		return;

	if (rtw_ft_chk_flags(padapter, RTW_FT_PEER_EN))
		rtw_ft_update_mdie(padapter, pattrib, pframe);

	if ((!is_reassoc) || (!rtw_ft_roam(padapter)))
		return;

	if (rtw_ft_update_rsnie(padapter, _FALSE, pattrib, pframe))
		rtw_ft_update_ftie(padapter, pattrib, pframe);	
}

u8 rtw_ft_update_auth_rsp_ies(_adapter *padapter, u8 *pframe, u32 len)
{
	u8 ret = _SUCCESS;
	u8 target_ap_addr[ETH_ALEN] = {0};
	struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
	struct ft_roam_info *pft_roam = &(pmlmepriv->ft_roam);

	if (!rtw_ft_roam(padapter))
		return _FAIL;

	/*rtw_ft_report_reassoc_evt already,
	 * and waiting for cfg80211_rtw_update_ft_ies */
	if (rtw_ft_authed_sta(padapter))
		return ret;

	if (!pframe || !len)
		return _FAIL;
	
	rtw_buf_update(&pmlmepriv->auth_rsp, 
		&pmlmepriv->auth_rsp_len, pframe, len);
	pft_roam->ft_event.ies =
		(pmlmepriv->auth_rsp + sizeof(struct rtw_ieee80211_hdr_3addr) + 6);
	pft_roam->ft_event.ies_len =
		(pmlmepriv->auth_rsp_len - sizeof(struct rtw_ieee80211_hdr_3addr) - 6);

	/*Not support RIC*/
	pft_roam->ft_event.ric_ies =  NULL;
	pft_roam->ft_event.ric_ies_len =  0;
	_rtw_memcpy(target_ap_addr, pmlmepriv->assoc_bssid, ETH_ALEN);
	rtw_ft_report_reassoc_evt(padapter, target_ap_addr);

	return ret;	
}

static void rtw_ft_start_clnt_action(_adapter *padapter, u8 *pTargetAddr)
{
	struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;

	rtw_ft_set_status(padapter, RTW_FT_REQUESTING_STA);
	rtw_ft_issue_action_req(padapter, pTargetAddr);
	_set_timer(&pmlmeext->ft_link_timer, REASSOC_TO);
}

void rtw_ft_start_roam(_adapter *padapter, u8 *pTargetAddr)
{
	struct mlme_ext_priv *pmlmeext = &padapter->mlmeextpriv;

	if (rtw_ft_otd_roam(padapter)) {
		RTW_FT_INFO("%s : try OTD roaming\n", __func__);
		rtw_ft_start_clnt_action(padapter, pTargetAddr);
	} else {
		/*wait a little time to retrieve packets buffered in the current ap while scan*/
		RTW_FT_INFO("%s : start roaming timer\n", __func__);
		_set_timer(&pmlmeext->ft_roam_timer, 30);
	}
}

void rtw_ft_issue_action_req(_adapter *padapter, u8 *pTargetAddr)
{
	struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
	struct xmit_priv *pxmitpriv = &(padapter->xmitpriv);
	struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
	struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
	struct xmit_frame *pmgntframe;
	struct rtw_ieee80211_hdr *pwlanhdr;
	struct pkt_attrib *pattrib;
	u8 *pframe;
	u8 category = RTW_WLAN_CATEGORY_FT;
	u8 action = RTW_WLAN_ACTION_FT_REQ;

	pmgntframe = alloc_mgtxmitframe(pxmitpriv);
	if (pmgntframe == NULL)
		return;

	pattrib = &pmgntframe->attrib;
	update_mgntframe_attrib(padapter, pattrib);
	_rtw_memset(pmgntframe->buf_addr, 0, WLANHDR_OFFSET + TXDESC_OFFSET);

	pframe = (u8 *)(pmgntframe->buf_addr) + TXDESC_OFFSET;
	pwlanhdr = (struct rtw_ieee80211_hdr *)pframe;
	pwlanhdr->frame_ctl = 0;

	_rtw_memcpy(pwlanhdr->addr1, get_my_bssid(&pmlmeinfo->network), ETH_ALEN);
	_rtw_memcpy(pwlanhdr->addr2, adapter_mac_addr(padapter), ETH_ALEN);
	_rtw_memcpy(pwlanhdr->addr3, get_my_bssid(&pmlmeinfo->network), ETH_ALEN);

	SetSeqNum(pwlanhdr, pmlmeext->mgnt_seq);
	pmlmeext->mgnt_seq++;
	set_frame_sub_type(pframe, WIFI_ACTION);

	pframe += sizeof(struct rtw_ieee80211_hdr_3addr);
	pattrib->pktlen = sizeof(struct rtw_ieee80211_hdr_3addr);

	pframe = rtw_set_fixed_ie(pframe, 1, &(category), &(pattrib->pktlen));
	pframe = rtw_set_fixed_ie(pframe, 1, &(action), &(pattrib->pktlen));

	_rtw_memcpy(pframe, adapter_mac_addr(padapter), ETH_ALEN);
	pframe += ETH_ALEN;
	pattrib->pktlen += ETH_ALEN;

	_rtw_memcpy(pframe, pTargetAddr, ETH_ALEN);
	pframe += ETH_ALEN;
	pattrib->pktlen += ETH_ALEN;

	rtw_ft_update_mdie(padapter, pattrib, &pframe);
	if (rtw_ft_update_rsnie(padapter, _TRUE, pattrib, &pframe))
		rtw_ft_update_ftie(padapter, pattrib, &pframe);

	RTW_INFO("FT : issue RTW_WLAN_ACTION_FT_REQ\n");
	pattrib->last_txcmdsz = pattrib->pktlen;
	dump_mgntframe(padapter, pmgntframe);
}

void rtw_ft_report_evt(_adapter *padapter)
{
	struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
	struct ft_roam_info *pft_roam = &(pmlmepriv->ft_roam);
	struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
	struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
	WLAN_BSSID_EX *pnetwork = (WLAN_BSSID_EX *)&(pmlmeinfo->network);
	struct cfg80211_ft_event_params ft_evt_parms;
	_irqL irqL;

	_rtw_memset(&ft_evt_parms, 0, sizeof(ft_evt_parms));
	rtw_ft_update_stainfo(padapter, pnetwork);

	if (!pnetwork)
		goto err_2;

	ft_evt_parms.ies_len = pft_roam->ft_event.ies_len;
	ft_evt_parms.ies =  rtw_zmalloc(ft_evt_parms.ies_len);
	if (ft_evt_parms.ies)
		_rtw_memcpy((void *)ft_evt_parms.ies, pft_roam->ft_event.ies, ft_evt_parms.ies_len);
	 else
		goto err_2;

	ft_evt_parms.target_ap = rtw_zmalloc(ETH_ALEN);
	if (ft_evt_parms.target_ap)
		_rtw_memcpy((void *)ft_evt_parms.target_ap, pnetwork->MacAddress, ETH_ALEN);
	else
		goto err_1;

	ft_evt_parms.ric_ies = pft_roam->ft_event.ric_ies;
	ft_evt_parms.ric_ies_len = pft_roam->ft_event.ric_ies_len;

	/* It's a KERNEL issue between v4.11 ~ v4.16, 
	* <= v4.10, NLMSG_DEFAULT_SIZE is used for nlmsg_new().
	* v4.11 ~ v4.16, only used "100 + >ric_ies_len" for nlmsg_new() 
	*	even then DRIVER don't support RIC.
	* >= v4.17, issue should correct as "100 + ies_len + ric_ies_len".
	*/	
	#if ((LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)) && \
	(LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)))
		ft_evt_parms.ric_ies_len = (ft_evt_parms.ies_len <= 100 )?
			(0):(ft_evt_parms.ies_len - 100);
	#endif
	
	rtw_ft_lock_set_status(padapter, RTW_FT_AUTHENTICATED_STA, &irqL);
	rtw_cfg80211_ft_event(padapter, &ft_evt_parms);
	RTW_INFO("FT: rtw_ft_report_evt\n");
	rtw_mfree((u8 *)pft_roam->ft_event.target_ap, ETH_ALEN);
err_1:
	rtw_mfree((u8 *)ft_evt_parms.ies, ft_evt_parms.ies_len);
err_2:
	return;
}

void rtw_ft_report_reassoc_evt(_adapter *padapter, u8 *pMacAddr)
{
	struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
	struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
	struct cmd_obj *pcmd_obj = NULL;
	struct stassoc_event *passoc_sta_evt = NULL;
	struct rtw_evt_header *evt_hdr = NULL;
	u8 *pevtcmd = NULL;
	u32 cmdsz = 0;

	pcmd_obj = (struct cmd_obj *)rtw_zmalloc(sizeof(struct cmd_obj));
	if (pcmd_obj == NULL)
		return;

	cmdsz = (sizeof(struct stassoc_event) + sizeof(struct rtw_evt_header));
	pevtcmd = (u8 *)rtw_zmalloc(cmdsz);
	if (pevtcmd == NULL) {
		rtw_mfree((u8 *)pcmd_obj, sizeof(struct cmd_obj));
		return;
	}

	_rtw_init_listhead(&pcmd_obj->list);
	pcmd_obj->cmdcode = CMD_SET_MLME_EVT;
	pcmd_obj->cmdsz = cmdsz;
	pcmd_obj->parmbuf = pevtcmd;
	pcmd_obj->rsp = NULL;
	pcmd_obj->rspsz  = 0;

	evt_hdr = (struct rtw_evt_header *)(pevtcmd);
	evt_hdr->len = sizeof(struct stassoc_event);
	evt_hdr->id = EVT_FT_REASSOC;
	evt_hdr->seq = ATOMIC_INC_RETURN(&pmlmeext->event_seq);

	passoc_sta_evt = (struct stassoc_event *)(pevtcmd + sizeof(struct rtw_evt_header));
	_rtw_memcpy((unsigned char *)(&(passoc_sta_evt->macaddr)), pMacAddr, ETH_ALEN);
	rtw_enqueue_cmd(pcmdpriv, pcmd_obj);
}

void rtw_ft_link_timer_hdl(void *ctx)
{
	_adapter *padapter = (_adapter *)ctx;
	struct mlme_ext_priv *pmlmeext = &(padapter->mlmeextpriv);
	struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
	struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);
	struct ft_roam_info *pft_roam = &(pmlmepriv->ft_roam);

	if (rtw_ft_chk_status(padapter, RTW_FT_REQUESTING_STA)) {
		if (pft_roam->ft_req_retry_cnt < RTW_FT_ACTION_REQ_LMT) {
			pft_roam->ft_req_retry_cnt++;
			rtw_ft_issue_action_req(padapter, (u8 *)pmlmepriv->roam_network->network.MacAddress);
			_set_timer(&pmlmeext->ft_link_timer, REASSOC_TO);
		} else {
			pft_roam->ft_req_retry_cnt = 0;	
			if (pmlmeinfo->state & WIFI_FW_ASSOC_SUCCESS)
				rtw_ft_set_status(padapter, RTW_FT_ASSOCIATED_STA);
			else
				rtw_ft_reset_status(padapter);
		}
	}
}

void rtw_ft_roam_timer_hdl(void *ctx)
{
	_adapter *padapter = (_adapter *)ctx;
	struct mlme_priv *pmlmepriv = &(padapter->mlmepriv);

	RTW_FT_INFO("%s : try roaming\n", __func__);
	receive_disconnect(padapter, pmlmepriv->cur_network.network.MacAddress
				, WLAN_REASON_ACTIVE_ROAM, _FALSE);
}

void rtw_ft_roam_status_reset(_adapter *padapter)
{
	struct ft_roam_info *pft_roam = &(padapter->mlmepriv.ft_roam);

	if ((rtw_to_roam(padapter) > 0) && 
		(!rtw_ft_chk_status(padapter, RTW_FT_REQUESTED_STA))) {
		rtw_ft_reset_status(padapter);
	}	
	
	padapter->mlmepriv.ft_roam.ft_updated_bcn = _FALSE;
}

#endif /* CONFIG_RTW_80211R */