/******************************************************************************
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*
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* Copyright(c) 2007 - 2017 Realtek Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*****************************************************************************/
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#ifndef __RTW_WNM_H_
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#define __RTW_WNM_H_
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#define RTW_RRM_NB_RPT_EN BIT(1)
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#define RTW_MAX_NB_RPT_NUM 8
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#define RTW_WNM_FEATURE_BTM_REQ_EN BIT(0)
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#define rtw_roam_busy_scan(a, nb) \
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(((a)->mlmepriv.LinkDetectInfo.bBusyTraffic == _TRUE) && \
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(((a)->mlmepriv.ch_cnt) < ((nb)->nb_rpt_ch_list_num)))
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#define rtw_wnm_btm_preference_cap(a) \
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((a)->mlmepriv.nb_info.preference_en == _TRUE)
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#define rtw_wnm_btm_roam_triggered(a) \
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(((a)->mlmepriv.nb_info.preference_en == _TRUE) \
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&& (rtw_ft_chk_flags((a), RTW_FT_BTM_ROAM)) \
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)
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#define rtw_wnm_btm_diff_bss(a) \
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((rtw_wnm_btm_preference_cap(a)) && \
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(is_zero_mac_addr((a)->mlmepriv.nb_info.roam_target_addr) == _FALSE) && \
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(_rtw_memcmp((a)->mlmepriv.nb_info.roam_target_addr,\
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(a)->mlmepriv.cur_network.network.MacAddress, ETH_ALEN) == _FALSE))
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#define rtw_wnm_btm_roam_candidate(a, c) \
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((rtw_wnm_btm_preference_cap(a)) && \
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(is_zero_mac_addr((a)->mlmepriv.nb_info.roam_target_addr) == _FALSE) && \
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(_rtw_memcmp((a)->mlmepriv.nb_info.roam_target_addr,\
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(c)->network.MacAddress, ETH_ALEN)))
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#define rtw_wnm_set_ext_cap_btm(_pEleStart, _val) \
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SET_BITS_TO_LE_1BYTE(((u8 *)(_pEleStart))+2, 3, 1, _val)
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#define wnm_btm_bss_term_inc(p) (*((u8 *)((p)+3)) & BSS_TERMINATION_INCLUDED)
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#define wnm_btm_ess_disassoc_im(p) (*((u8 *)((p)+3)) & ESS_DISASSOC_IMMINENT)
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#define wnm_btm_dialog_token(p) (*((u8 *)((p)+2)))
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#define wnm_btm_req_mode(p) (*((u8 *)((p)+3)))
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#define wnm_btm_disassoc_timer(p) (*((u16 *)((p)+4)))
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#define wnm_btm_valid_interval(p) (*((u8 *)((p)+6)))
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#define wnm_btm_term_duration_offset(p) ((p)+7)
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#define wnm_btm_rsp_status(p) (*((u8 *)((p)+3)))
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#define wnm_btm_rsp_term_delay(p) (*((u8 *)((p)+4)))
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#define RTW_WLAN_ACTION_WNM_NB_RPT_ELEM 0x34
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enum rtw_ieee80211_wnm_actioncode {
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RTW_WLAN_ACTION_WNM_BTM_QUERY = 6,
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RTW_WLAN_ACTION_WNM_BTM_REQ = 7,
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RTW_WLAN_ACTION_WNM_BTM_RSP = 8,
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RTW_WLAN_ACTION_WNM_NOTIF_REQ = 26,
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RTW_WLAN_ACTION_WNM_NOTIF_RSP = 27,
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};
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/*IEEE Std 80211k Figure 7-95b Neighbor Report element format*/
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struct nb_rpt_hdr {
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u8 id; /*0x34: Neighbor Report Element ID*/
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u8 len;
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u8 bssid[ETH_ALEN];
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u32 bss_info;
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u8 reg_class;
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u8 ch_num;
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u8 phy_type;
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};
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/*IEEE Std 80211v, Figure 7-9 BSS Termination Duration subelement field format */
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struct btm_term_duration {
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u8 id;
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u8 len;
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u64 tsf; /* value of the TSF counter when BSS termination will occur in the future */
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u16 duration; /* number of minutes for which the BSS is not present*/
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};
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/*IEEE Std 80211v, Figure 7-10 BSS Transition Management Request frame body format */
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struct btm_req_hdr {
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u8 dialog_token;
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u8 req_mode;
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/* number of TBTTs until the AP sends a Disassociation frame to this STA */
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u16 disassoc_timer;
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/* number of TBTTs until the BSS transition candidate list is no longer valid */
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u8 validity_interval;
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struct btm_term_duration term_duration;
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};
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struct btm_rsp_hdr {
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u8 dialog_token;
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u8 status;
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/* the number of minutes that
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the responding STA requests the BSS to delay termination */
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u8 termination_delay;
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u8 bssid[ETH_ALEN];
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u8 *pcandidates;
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u32 candidates_num;
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};
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struct btm_rpt_cache {
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u8 dialog_token;
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u8 req_mode;
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u16 disassoc_timer;
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u8 validity_interval;
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struct btm_term_duration term_duration;
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/* from BTM req */
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u32 validity_time;
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u32 disassoc_time;
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systime req_stime;
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};
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/*IEEE Std 80211v, Table 7-43b Optional Subelement IDs for Neighbor Report*/
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/* BSS Transition Candidate Preference */
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#define WNM_BTM_CAND_PREF_SUBEID 0x03
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/* BSS Termination Duration */
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#define WNM_BTM_TERM_DUR_SUBEID 0x04
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struct wnm_btm_cant {
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struct nb_rpt_hdr nb_rpt;
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u8 preference; /* BSS Transition Candidate Preference */
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};
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enum rtw_btm_req_mod {
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PREFERRED_CANDIDATE_LIST_INCLUDED = BIT0,
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ABRIDGED = BIT1,
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DISASSOC_IMMINENT = BIT2,
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BSS_TERMINATION_INCLUDED = BIT3,
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ESS_DISASSOC_IMMINENT = BIT4,
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};
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struct roam_nb_info {
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struct nb_rpt_hdr nb_rpt[RTW_MAX_NB_RPT_NUM];
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struct rtw_ieee80211_channel nb_rpt_ch_list[RTW_MAX_NB_RPT_NUM];
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struct btm_rpt_cache btm_cache;
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bool nb_rpt_valid;
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u8 nb_rpt_ch_list_num;
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u8 preference_en;
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u8 roam_target_addr[ETH_ALEN];
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u32 last_nb_rpt_entries;
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u8 nb_rpt_is_same;
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s8 disassoc_waiting;
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_timer roam_scan_timer;
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_timer disassoc_chk_timer;
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u32 features;
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};
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u8 rtw_wnm_btm_reassoc_req(_adapter *padapter);
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void rtw_wnm_roam_scan_hdl(void *ctx);
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void rtw_wnm_disassoc_chk_hdl(void *ctx);
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u8 rtw_wnm_try_btm_roam_imnt(_adapter *padapter);
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void rtw_wnm_process_btm_req(_adapter *padapter, u8* pframe, u32 frame_len);
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void rtw_wnm_reset_btm_candidate(struct roam_nb_info *pnb);
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void rtw_wnm_reset_btm_state(_adapter *padapter);
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u32 rtw_wnm_btm_rsp_candidates_sz_get(
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_adapter *padapter, u8* pframe, u32 frame_len);
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void rtw_wnm_process_btm_rsp(_adapter *padapter,
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u8* pframe, u32 frame_len, struct btm_rsp_hdr *prsp);
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void rtw_wnm_issue_btm_req(_adapter *padapter,
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u8 *pmac, struct btm_req_hdr *phdr, u8 *purl, u32 url_len,
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u8 *pcandidates, u8 candidate_cnt);
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void rtw_wnm_reset_btm_cache(_adapter *padapter);
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void rtw_wnm_issue_action(_adapter *padapter, u8 action, u8 reason, u8 dialog);
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void rtw_wnm_update_reassoc_req_ie(_adapter *padapter);
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void rtw_roam_nb_info_init(_adapter *padapter);
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u8 rtw_roam_nb_scan_list_set(_adapter *padapter,
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struct sitesurvey_parm *pparm);
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u32 rtw_wnm_btm_candidates_survey(_adapter *padapter,
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u8* pframe, u32 elem_len, u8 is_preference);
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#endif /* __RTW_WNM_H_ */
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