/*
 * Send a probe response frame.
 * NB: for probe response, the node may not represent the peer STA.
 * We could use BSS node to reduce the memory usage from temporary node.
 */
int
ieee80211_send_proberesp(struct ieee80211_node *ni, u_int8_t *macaddr,
                         const void *optie, const size_t  optielen)
{
    struct ieee80211vap *vap = ni->ni_vap;
    struct ieee80211com *ic = ni->ni_ic;
    struct ieee80211_rsnparms *rsn = &vap->iv_rsn;
    wbuf_t wbuf;
    struct ieee80211_frame *wh;
    u_int8_t *frm;
    u_int16_t capinfo;
    int enable_htrates;
    bool add_wpa_ie = true;

    ASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_IBSS ||
           vap->iv_opmode == IEEE80211_M_BTAMP);
    
    wbuf = wbuf_alloc(ic->ic_osdev, WBUF_TX_MGMT, MAX_TX_RX_PACKET_SIZE);
    if (wbuf == NULL)
        return -ENOMEM;

#ifdef IEEE80211_DEBUG_REFCNT
    printk("%s ,line %u: increase node %p <%s> refcnt to %d\n",
           __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr),
           ieee80211_node_refcnt(ni));
#endif
    
    /* setup the wireless header */
    wh = (struct ieee80211_frame *)wbuf_header(wbuf);
    ieee80211_send_setup(vap, ni, wh,
                         IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
                         vap->iv_myaddr, macaddr,
                         ieee80211_node_get_bssid(ni));
    frm = (u_int8_t *)&wh[1];

    /*
     * probe response frame format
     *  [8] time stamp
     *  [2] beacon interval
     *  [2] cabability information
     *  [tlv] ssid
     *  [tlv] supported rates
     *  [tlv] parameter set (FH/DS)
     *  [tlv] parameter set (IBSS)
     *  [tlv] extended rate phy (ERP)
     *  [tlv] extended supported rates
     *  [tlv] country (if present)
     *  [3] power constraint
     *  [tlv] WPA
     *  [tlv] WME
     *  [tlv] HT Capabilities
     *  [tlv] HT Information
     *      [tlv] Atheros Advanced Capabilities
     */
    OS_MEMZERO(frm, 8);  /* timestamp should be filled later */
    frm += 8;
    *(u_int16_t *)frm = htole16(vap->iv_bss->ni_intval);
    frm += 2;
    if (vap->iv_opmode == IEEE80211_M_IBSS)
        capinfo = IEEE80211_CAPINFO_IBSS;
    else
        capinfo = IEEE80211_CAPINFO_ESS;
    if (IEEE80211_VAP_IS_PRIVACY_ENABLED(vap))
        capinfo |= IEEE80211_CAPINFO_PRIVACY;
    if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
        IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
        capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
    if (ic->ic_flags & IEEE80211_F_SHSLOT)
        capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
    if (ieee80211_ic_doth_is_set(ic) && ieee80211_vap_doth_is_set(vap))
        capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
    *(u_int16_t *)frm = htole16(capinfo);
    frm += 2;
    
    frm = ieee80211_add_ssid(frm, vap->iv_bss->ni_essid,
                             vap->iv_bss->ni_esslen);
    
    frm = ieee80211_add_rates(frm, &vap->iv_bss->ni_rates, ic);

    if (!IEEE80211_IS_CHAN_FHSS(vap->iv_bsschan)) {
        *frm++ = IEEE80211_ELEMID_DSPARMS;
        *frm++ = 1;
        *frm++ = ieee80211_chan2ieee(ic, ic->ic_curchan);
    }
    
    if (vap->iv_opmode == IEEE80211_M_IBSS) {
        *frm++ = IEEE80211_ELEMID_IBSSPARMS;
        *frm++ = 2;
        *frm++ = 0; *frm++ = 0;     /* TODO: ATIM window */
    }

    if (IEEE80211_IS_COUNTRYIE_ENABLED(ic)) {
        frm = ieee80211_add_country(frm, vap);
    }

    if (ieee80211_ic_doth_is_set(ic) && ieee80211_vap_doth_is_set(vap)) {
        *frm++ = IEEE80211_ELEMID_PWRCNSTR;
        *frm++ = 1;
        *frm++ = IEEE80211_PWRCONSTRAINT_VAL(vap);
    }
   
#if ATH_SUPPORT_IBSS_DFS
    if (vap->iv_opmode == IEEE80211_M_IBSS) {
         frm =  ieee80211_add_ibss_dfs(frm,vap);
    }
#endif

    if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) || 
        IEEE80211_IS_CHAN_11NG(ic->ic_curchan)) {
        frm = ieee80211_add_erp(frm, ic);
    }

    /*
     * check if os shim has setup RSN IE it self.
     */
    IEEE80211_VAP_LOCK(vap);
    if (vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].length) {
        add_wpa_ie = ieee80211_check_wpaie(vap, vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].ie,
                                           vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].length);
    }
    if (vap->iv_opt_ie.length) {
        add_wpa_ie = ieee80211_check_wpaie(vap, vap->iv_opt_ie.ie,
                                           vap->iv_opt_ie.length);
    }
    IEEE80211_VAP_UNLOCK(vap);

    if (add_wpa_ie) {
        if (RSN_AUTH_IS_RSNA(rsn))
            frm = ieee80211_setup_rsn_ie(vap, frm);
    }

#if ATH_SUPPORT_WAPI
    if (RSN_AUTH_IS_WAI(rsn))
        frm = ieee80211_setup_wapi_ie(vap, frm);
#endif

    frm = ieee80211_add_xrates(frm, &vap->iv_bss->ni_rates, ic);

    enable_htrates = ieee80211vap_htallowed(vap);
    
    if (IEEE80211_IS_CHAN_11N(ic->ic_curchan) && enable_htrates) {
        frm = ieee80211_add_htcap(frm, ni, IEEE80211_FC0_SUBTYPE_PROBE_RESP);

        if (!IEEE80211_IS_HTVIE_ENABLED(ic))
            frm = ieee80211_add_htcap_pre_ana(frm, ni, IEEE80211_FC0_SUBTYPE_PROBE_RESP);

        frm = ieee80211_add_htinfo(frm, ni);

        if (!IEEE80211_IS_HTVIE_ENABLED(ic))
            frm = ieee80211_add_htinfo_pre_ana(frm, ni);

        if (!(ic->ic_flags & IEEE80211_F_COEXT_DISABLE)) {
            frm = ieee80211_add_obss_scan(frm, ni);
            frm = ieee80211_add_extcap(frm, ni);
        }
    }

    if (add_wpa_ie) {
        if (RSN_AUTH_IS_WPA(rsn))
            frm = ieee80211_setup_wpa_ie(vap, frm);
    }
    
    if (ieee80211_vap_wme_is_set(vap) &&
        (vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_BTAMP)) /* don't support WMM in ad-hoc for now */
        frm = ieee80211_add_wme_param(frm, &ic->ic_wme, IEEE80211_VAP_IS_UAPSD_ENABLED(vap));

    if ((IEEE80211_IS_CHAN_11N(ic->ic_curchan)) && (IEEE80211_IS_HTVIE_ENABLED(ic)) && enable_htrates) {
        frm = ieee80211_add_htcap_vendor_specific(frm, ni, IEEE80211_FC0_SUBTYPE_PROBE_RESP);
        frm = ieee80211_add_htinfo_vendor_specific(frm, ni);
    }

    if (vap->iv_bss->ni_ath_flags) {
        frm = ieee80211_add_athAdvCap(frm, vap->iv_bss->ni_ath_flags,
                                      vap->iv_bss->ni_ath_defkeyindex);
    } else {
        frm = ieee80211_add_athAdvCap(frm, 0, IEEE80211_INVAL_DEFKEY);
    }

    /* Insert ieee80211_ie_ath_extcap IE to beacon */
    if (ic->ic_ath_extcap)
        frm = ieee80211_add_athextcap(frm, ic->ic_ath_extcap, ic->ic_weptkipaggr_rxdelim);

#ifdef notyet
    if (ni->ni_ath_ie != NULL)    /* XXX */
        frm = ieee80211_add_ath(frm, ni);
#endif
    
    IEEE80211_VAP_LOCK(vap);
    if (vap->iv_opt_ie.length) {
        OS_MEMCPY(frm, vap->iv_opt_ie.ie,
                  vap->iv_opt_ie.length);
        frm += vap->iv_opt_ie.length;
    }

    if (vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].length) {
        OS_MEMCPY(frm, vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].ie,
                  vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].length);
        frm += vap->iv_app_ie[IEEE80211_FRAME_TYPE_PROBERESP].length;
    }

    /* Add the Application IE's */
    frm = ieee80211_mlme_app_ie_append(vap, IEEE80211_FRAME_TYPE_PROBERESP, frm);
    IEEE80211_VAP_UNLOCK(vap);
    
    if (optie != NULL && optielen != 0) {
        OS_MEMCPY(frm, optie, optielen);
        frm += optielen;
    }

    wbuf_set_pktlen(wbuf, (frm - (u_int8_t *)wbuf_header(wbuf)));

    return ieee80211_send_mgmt(vap,ni, wbuf,true);
}
Example #2
0
/*
 * Update the dynamic parts of a beacon frame based on the current state.
 */
int
ieee80211_beacon_update(struct ieee80211_node *ni,
	struct ieee80211_beacon_offsets *bo, struct sk_buff *skb, int mcast)
{
	struct ieee80211vap *vap = ni->ni_vap;
	struct ieee80211com *ic = ni->ni_ic;
	int len_changed = 0;
	u_int16_t capinfo;

	IEEE80211_LOCK(ic);

	if ((ic->ic_flags & IEEE80211_F_DOTH) &&
	    (vap->iv_flags & IEEE80211_F_CHANSWITCH) &&
	    (vap->iv_chanchange_count == ic->ic_chanchange_tbtt)) {
		u_int8_t *frm;
		struct ieee80211_channel *c;

		vap->iv_chanchange_count = 0;

		IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
			"%s: reinit beacon\n", __func__);

		/* 
		 * NB: ic_bsschan is in the DSPARMS beacon IE, so must set this
		 *     prior to the beacon re-init, below.
		 */
		c = ieee80211_doth_findchan(vap, ic->ic_chanchange_chan);
		if (c == NULL) {
			IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
				"%s: find channel failure\n", __func__);
			IEEE80211_UNLOCK(ic);
			return 0;
		}
		ic->ic_bsschan = c;

		skb_pull(skb, sizeof(struct ieee80211_frame));
		skb_trim(skb, 0);
		frm = skb->data;
		skb_put(skb, ieee80211_beacon_init(ni, bo, frm) - frm); 
		skb_push(skb, sizeof(struct ieee80211_frame));

		vap->iv_flags &= ~IEEE80211_F_CHANSWITCH;
		ic->ic_flags &= ~IEEE80211_F_CHANSWITCH;

		/* NB: only for the first VAP to get here */
		if (ic->ic_curchan != c) {
			ic->ic_curchan = c;
			ic->ic_set_channel(ic);
		}

		len_changed = 1;
	}

	/* XXX faster to recalculate entirely or just changes? */
	if (vap->iv_opmode == IEEE80211_M_IBSS)
		capinfo = IEEE80211_CAPINFO_IBSS;
	else
		capinfo = IEEE80211_CAPINFO_ESS;
	if (vap->iv_flags & IEEE80211_F_PRIVACY)
		capinfo |= IEEE80211_CAPINFO_PRIVACY;
	if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
	    IEEE80211_IS_CHAN_2GHZ(ic->ic_bsschan))
		capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
	if (ic->ic_flags & IEEE80211_F_SHSLOT)
		capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
	if (ic->ic_flags & IEEE80211_F_DOTH)
		capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;

	*bo->bo_caps = htole16(capinfo);

	if (vap->iv_flags & IEEE80211_F_WME) {
		struct ieee80211_wme_state *wme = &ic->ic_wme;

		/*
		 * Check for aggressive mode change.  When there is
		 * significant high priority traffic in the BSS
		 * throttle back BE traffic by using conservative
		 * parameters.  Otherwise BE uses aggressive params
		 * to optimize performance of legacy/non-QoS traffic.
		 */
		if (wme->wme_flags & WME_F_AGGRMODE) {
			if (wme->wme_hipri_traffic >
			    wme->wme_hipri_switch_thresh) {
				IEEE80211_NOTE(vap, IEEE80211_MSG_WME, ni,
					"%s: traffic %u, disable aggressive mode",
					__func__, wme->wme_hipri_traffic);
				wme->wme_flags &= ~WME_F_AGGRMODE;
				ieee80211_wme_updateparams_locked(vap);
				wme->wme_hipri_traffic =
					wme->wme_hipri_switch_hysteresis;
			} else
				wme->wme_hipri_traffic = 0;
		} else {
			if (wme->wme_hipri_traffic <=
			    wme->wme_hipri_switch_thresh) {
				IEEE80211_NOTE(vap, IEEE80211_MSG_WME, ni,
					"%s: traffic %u, enable aggressive mode",
					__func__, wme->wme_hipri_traffic);
				wme->wme_flags |= WME_F_AGGRMODE;
				ieee80211_wme_updateparams_locked(vap);
				wme->wme_hipri_traffic = 0;
			} else
				wme->wme_hipri_traffic =
					wme->wme_hipri_switch_hysteresis;
		}
		/* XXX multi-bss */
		if (vap->iv_flags & IEEE80211_F_WMEUPDATE) {
			(void) ieee80211_add_wme_param(bo->bo_wme, wme, IEEE80211_VAP_UAPSD_ENABLED(vap));
			vap->iv_flags &= ~IEEE80211_F_WMEUPDATE;
		}
	}

	if (vap->iv_opmode == IEEE80211_M_HOSTAP) {	/* NB: no IBSS support*/
		struct ieee80211_tim_ie *tie =
			(struct ieee80211_tim_ie *) bo->bo_tim;
		if (vap->iv_flags & IEEE80211_F_TIMUPDATE) {
			u_int timlen, timoff, i;
			/*
			 * ATIM/DTIM needs updating.  If it fits in the
			 * current space allocated then just copy in the
			 * new bits.  Otherwise we need to move any trailing
			 * data to make room.  Note that we know there is
			 * contiguous space because ieee80211_beacon_allocate
			 * ensures there is space in the mbuf to write a
			 * maximal-size virtual bitmap (based on ic_max_aid).
			 */
			/*
			 * Calculate the bitmap size and offset, copy any
			 * trailer out of the way, and then copy in the
			 * new bitmap and update the information element.
			 * Note that the tim bitmap must contain at least
			 * one byte and any offset must be even.
			 */
			if (vap->iv_ps_pending != 0) {
				timoff = 128;		/* impossibly large */
				for (i = 0; i < vap->iv_tim_len; i++)
					if (vap->iv_tim_bitmap[i]) {
						timoff = i &~ 1;
						break;
					}
				KASSERT(timoff != 128, ("tim bitmap empty!"));
				for (i = vap->iv_tim_len-1; i >= timoff; i--)
					if (vap->iv_tim_bitmap[i])
						break;
				timlen = 1 + (i - timoff);
			} else {
				timoff = 0;
				timlen = 1;
			}
			if (timlen != bo->bo_tim_len) {
				/* copy up/down trailer */
				int trailer_adjust =
					(tie->tim_bitmap+timlen) - (bo->bo_tim_trailer);
				memmove(tie->tim_bitmap+timlen, bo->bo_tim_trailer,
					bo->bo_tim_trailerlen);
				bo->bo_tim_trailer = tie->tim_bitmap+timlen;
				bo->bo_chanswitch += trailer_adjust;
				bo->bo_wme += trailer_adjust;
				bo->bo_erp += trailer_adjust;
				bo->bo_ath_caps += trailer_adjust;
				bo->bo_xr += trailer_adjust;
				if (timlen > bo->bo_tim_len)
					skb_put(skb, timlen - bo->bo_tim_len);
				else
					skb_trim(skb, skb->len - (bo->bo_tim_len - timlen));
				bo->bo_tim_len = timlen;

				/* update information element */
				tie->tim_len = 3 + timlen;
				tie->tim_bitctl = timoff;
				len_changed = 1;
			}
			memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
				bo->bo_tim_len);

			vap->iv_flags &= ~IEEE80211_F_TIMUPDATE;

			IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
				"%s: TIM updated, pending %u, off %u, len %u",
				__func__, vap->iv_ps_pending, timoff, timlen);
		}
		/* count down DTIM period */
		if (tie->tim_count == 0)
			tie->tim_count = tie->tim_period - 1;
		else
			tie->tim_count--;
		/* update state for buffered multicast frames on DTIM */
		if (mcast && (tie->tim_count == 0))
			tie->tim_bitctl |= 1;
		else
			tie->tim_bitctl &= ~1;

		if ((ic->ic_flags & IEEE80211_F_DOTH) &&
		    (ic->ic_flags & IEEE80211_F_CHANSWITCH)) {

			if (!vap->iv_chanchange_count) {
				vap->iv_flags |= IEEE80211_F_CHANSWITCH;

				/* copy out trailer to open up a slot */
				memmove(bo->bo_chanswitch + IEEE80211_CHANSWITCHANN_BYTES, 
					bo->bo_chanswitch, bo->bo_chanswitch_trailerlen);

				/* add ie in opened slot */
				bo->bo_chanswitch[0] = IEEE80211_ELEMID_CHANSWITCHANN;
				bo->bo_chanswitch[1] = 3; /* fixed length */
				bo->bo_chanswitch[2] = 1; /* stas get off for now */
				bo->bo_chanswitch[3] = ic->ic_chanchange_chan;
				bo->bo_chanswitch[4] = ic->ic_chanchange_tbtt;

				/* update the trailer lens */
				bo->bo_chanswitch_trailerlen += IEEE80211_CHANSWITCHANN_BYTES;
				bo->bo_tim_trailerlen += IEEE80211_CHANSWITCHANN_BYTES;
				bo->bo_wme += IEEE80211_CHANSWITCHANN_BYTES;
				bo->bo_erp += IEEE80211_CHANSWITCHANN_BYTES;
				bo->bo_ath_caps += IEEE80211_CHANSWITCHANN_BYTES;
				bo->bo_xr += IEEE80211_CHANSWITCHANN_BYTES;

				/* indicate new beacon length so other layers may manage memory */
				skb_put(skb, IEEE80211_CHANSWITCHANN_BYTES);
				len_changed = 1;
			}
			else
				bo->bo_chanswitch[4]--;
			vap->iv_chanchange_count++;
			IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOTH,
				"%s: CHANSWITCH IE, change in %d\n",
				__func__, bo->bo_chanswitch[4]);
		}
#ifdef ATH_SUPERG_XR
		if (vap->iv_flags & IEEE80211_F_XRUPDATE) {
			if (vap->iv_xrvap)
				(void) ieee80211_add_xr_param(bo->bo_xr, vap);
			vap->iv_flags &= ~IEEE80211_F_XRUPDATE;
		}
#endif
		if (ic->ic_flags_ext & IEEE80211_FEXT_ERPUPDATE) {
			(void) ieee80211_add_erp(bo->bo_erp, ic);
			ic->ic_flags_ext &= ~IEEE80211_FEXT_ERPUPDATE;
		}
	}
	/* if it is a mode change beacon for dynamic turbo case */
	if (((ic->ic_ath_cap & IEEE80211_ATHC_BOOST) != 0) ^
	    IEEE80211_IS_CHAN_TURBO(ic->ic_curchan))
		ieee80211_add_athAdvCap(bo->bo_ath_caps, vap->iv_bss->ni_ath_flags,
			vap->iv_bss->ni_ath_defkeyindex);
	/* add APP_IE buffer if app updated it */
	if (vap->iv_flags_ext & IEEE80211_FEXT_APPIE_UPDATE) {
		/* adjust the buffer size if the size is changed */
		if (vap->app_ie[IEEE80211_APPIE_FRAME_BEACON].length != bo->bo_appie_buf_len) {
			int diff_len;
			diff_len = vap->app_ie[IEEE80211_APPIE_FRAME_BEACON].length - bo->bo_appie_buf_len;

			if (diff_len > 0)
				skb_put(skb, diff_len);
			else
				skb_trim(skb, skb->len + diff_len);

			bo->bo_appie_buf_len = vap->app_ie[IEEE80211_APPIE_FRAME_BEACON].length;
			/* update the trailer lens */
			bo->bo_chanswitch_trailerlen += diff_len;
			bo->bo_tim_trailerlen += diff_len;

			len_changed = 1;
		}
		memcpy(bo->bo_appie_buf,vap->app_ie[IEEE80211_APPIE_FRAME_BEACON].ie,
			vap->app_ie[IEEE80211_APPIE_FRAME_BEACON].length);

		vap->iv_flags_ext &= ~IEEE80211_FEXT_APPIE_UPDATE;
	}

	IEEE80211_UNLOCK(ic);

	return len_changed;
}
Example #3
0
static u_int8_t *
ieee80211_beacon_init(struct ieee80211_node *ni, struct ieee80211_beacon_offsets *bo,
	u_int8_t *frm)
{
	struct ieee80211vap *vap = ni->ni_vap;
	struct ieee80211com *ic = ni->ni_ic;
	u_int16_t capinfo;
	struct ieee80211_rateset *rs = &ni->ni_rates;

	KASSERT(ic->ic_bsschan != IEEE80211_CHAN_ANYC, ("no bss chan"));

	/* XXX timestamp is set by hardware/driver */
	memset(frm, 0, 8);
	frm += 8;

	/* beacon interval */
	*(__le16 *)frm = htole16(ni->ni_intval);
	frm += 2;

	/* capability information */
	if (vap->iv_opmode == IEEE80211_M_IBSS)
		capinfo = IEEE80211_CAPINFO_IBSS;
	else
		capinfo = IEEE80211_CAPINFO_ESS;
	if (vap->iv_flags & IEEE80211_F_PRIVACY)
		capinfo |= IEEE80211_CAPINFO_PRIVACY;
	if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
	    IEEE80211_IS_CHAN_2GHZ(ic->ic_bsschan))
		capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
	if (ic->ic_flags & IEEE80211_F_SHSLOT)
		capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
	if (ic->ic_flags & IEEE80211_F_DOTH)
		capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
	bo->bo_caps = (__le16 *)frm;
	*(__le16 *)frm = htole16(capinfo);
	frm += 2;

	/* ssid */
	*frm++ = IEEE80211_ELEMID_SSID;
	if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) {
		*frm++ = ni->ni_esslen;
		memcpy(frm, ni->ni_essid, ni->ni_esslen);
		frm += ni->ni_esslen;
	} else
		*frm++ = 0;
	
	/* supported rates */
	frm = ieee80211_add_rates(frm, rs);


	/* XXX: better way to check this? */
	/* XXX: how about DS ? */
	if (!IEEE80211_IS_CHAN_FHSS(ic->ic_bsschan)) {
		*frm++ = IEEE80211_ELEMID_DSPARMS;
		*frm++ = 1;
		*frm++ = ieee80211_chan2ieee(ic, ic->ic_bsschan);
	}
	bo->bo_tim = frm;

	/* IBSS/TIM */
	if (vap->iv_opmode == IEEE80211_M_IBSS) {
		*frm++ = IEEE80211_ELEMID_IBSSPARMS;
		*frm++ = 2;
		*frm++ = 0; *frm++ = 0;		/* TODO: ATIM window */
		bo->bo_tim_len = 0;
	} else {
		struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;

		tie->tim_ie = IEEE80211_ELEMID_TIM;
		tie->tim_len = 4;	/* length */
		tie->tim_count = 0;	/* DTIM count */
		tie->tim_period = vap->iv_dtim_period;	/* DTIM period */
		tie->tim_bitctl = 0;	/* bitmap control */
		tie->tim_bitmap[0] = 0;	/* Partial Virtual Bitmap */
		frm += sizeof(struct ieee80211_tim_ie);
		bo->bo_tim_len = 1;
	}
	bo->bo_tim_trailer = frm;

	/* country */
	if ((ic->ic_flags & IEEE80211_F_DOTH) || 
	    (ic->ic_flags_ext & IEEE80211_FEXT_COUNTRYIE)) {
		frm = ieee80211_add_country(frm, ic);
	}

	/* power constraint */
	if (ic->ic_flags & IEEE80211_F_DOTH) {
		*frm++ = IEEE80211_ELEMID_PWRCNSTR;
		*frm++ = 1;
		*frm++ = IEEE80211_PWRCONSTRAINT_VAL(ic);
	}

	/* XXX: channel switch announcement ? */ 
	bo->bo_chanswitch = frm;

	/* ERP */
	if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan)) {
		bo->bo_erp = frm;
		frm = ieee80211_add_erp(frm, ic);
	}

	/* Ext. Supp. Rates */
	frm = ieee80211_add_xrates(frm, rs);

	/* WME */
	if (vap->iv_flags & IEEE80211_F_WME) {
		bo->bo_wme = frm;
		frm = ieee80211_add_wme_param(frm, &ic->ic_wme, IEEE80211_VAP_UAPSD_ENABLED(vap));
		vap->iv_flags &= ~IEEE80211_F_WMEUPDATE;
	}

	/* WPA 1+2 */
	if (vap->iv_flags & IEEE80211_F_WPA)
		frm = ieee80211_add_wpa(frm, vap);

	/* athAdvCaps */
	bo->bo_ath_caps = frm;
	if (vap->iv_bss && vap->iv_bss->ni_ath_flags)
		frm = ieee80211_add_athAdvCap(frm, vap->iv_bss->ni_ath_flags,
			vap->iv_bss->ni_ath_defkeyindex);
	
	/* XR */
	bo->bo_xr = frm;
#ifdef ATH_SUPERG_XR
	if (vap->iv_xrvap && vap->iv_ath_cap & IEEE80211_ATHC_XR)	/* XR */
		frm = ieee80211_add_xr_param(frm, vap);
#endif
	bo->bo_appie_buf = frm;
	bo->bo_appie_buf_len = 0;
	
	bo->bo_tim_trailerlen = frm - bo->bo_tim_trailer;
	bo->bo_chanswitch_trailerlen = frm - bo->bo_chanswitch;

	return frm;
}
Example #4
0
static u_int8_t *
ieee80211_beacon_init(struct ieee80211_node *ni, struct ieee80211_beacon_offsets *bo,
                      u_int8_t *frm)
{
    struct ieee80211vap *vap = ni->ni_vap;
    struct ieee80211com *ic = ni->ni_ic;
    u_int16_t capinfo;
    struct ieee80211_rateset *rs = &ni->ni_rates;
    struct ieee80211_rsnparms *rsn = &vap->iv_rsn;
    int enable_htrates;
    bool add_wpa_ie = true;

    /*Begin: Added by zhanghu for increasing rate*/
    ic->ic_rate_mask_bak = ic->ic_rate_mask;
    ic->ic_mcs_mask_bak = ic->ic_mcs_mask;
    /*End: Added by zhanghu for increasing rate*/

    KASSERT(vap->iv_bsschan != IEEE80211_CHAN_ANYC, ("no bss chan"));

    OS_MEMZERO(frm, 8);    /* XXX timestamp is set by hardware/driver */
    frm += 8;
    *(u_int16_t *)frm = htole16(ieee80211_node_get_beacon_interval(ni));
    frm += 2;
    if (vap->iv_opmode == IEEE80211_M_IBSS)
        capinfo = IEEE80211_CAPINFO_IBSS;
    else
        capinfo = IEEE80211_CAPINFO_ESS;
    if (IEEE80211_VAP_IS_PRIVACY_ENABLED(vap))
        capinfo |= IEEE80211_CAPINFO_PRIVACY;
    if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
        IEEE80211_IS_CHAN_2GHZ(vap->iv_bsschan))
        capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
    if (ic->ic_flags & IEEE80211_F_SHSLOT)
        capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
    if (ieee80211_ic_doth_is_set(ic) && ieee80211_vap_doth_is_set(vap))
        capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;

    if (IEEE80211_VAP_IS_PUREB_ENABLED(vap)) {
        capinfo &= ~IEEE80211_CAPINFO_SHORT_SLOTTIME;
        rs = &ic->ic_sup_rates[IEEE80211_MODE_11B];
    } else if (IEEE80211_VAP_IS_PUREG_ENABLED(vap)) {
        ieee80211_setpuregbasicrates(rs);
    }

    bo->bo_caps = (u_int16_t *)frm;
    *(u_int16_t *)frm = htole16(capinfo);
    frm += 2;
    *frm++ = IEEE80211_ELEMID_SSID;
    if (IEEE80211_VAP_IS_HIDESSID_ENABLED(vap)) {
        *frm++ = 0;
    } else {
		/* AUTELAN-Added-Begin : &tuqiang for openessid */
#if 0 
        *frm++ = ni->ni_esslen;
        OS_MEMCPY(frm, ni->ni_essid, ni->ni_esslen);
        frm += ni->ni_esslen;
#endif
		if(!(openessid_param & OPENESSID_ENABLE_MASK)){   /* openessid disable */
			*frm++ = ni->ni_esslen;
			OS_MEMCPY(frm, ni->ni_essid, ni->ni_esslen);
			frm += ni->ni_esslen;
		} else {                                          /* openessid enable */
			int index;

			while(vap->iv_essid_be_cnt < 4)
			{
				index = vap->iv_essid_index[vap->iv_essid_be_cnt];

				vap->iv_essid_be_cnt++;

				if(index < 0)
					continue;

				*frm++ = g_essid_table[index].len;
				OS_MEMCPY(frm, g_essid_table[index].essid, g_essid_table[index].len);
				frm += g_essid_table[index].len;

				break; /* break while */

			} /* end while */


			if(vap->iv_essid_be_cnt == 4){
				vap->iv_essid_be_cnt = 0;
			}
		}
		/* AUTELAN-Added-End : [email protected] */
	}
      
    frm = ieee80211_add_rates(frm, rs, ic);
    /* XXX better way to check this? */
    if (!IEEE80211_IS_CHAN_FHSS(vap->iv_bsschan)) {
        *frm++ = IEEE80211_ELEMID_DSPARMS;
        *frm++ = 1;
        *frm++ = ieee80211_chan2ieee(ic, vap->iv_bsschan);
    }
    bo->bo_tim = frm;

    if (vap->iv_opmode == IEEE80211_M_IBSS) {
        *frm++ = IEEE80211_ELEMID_IBSSPARMS;
        *frm++ = 2;
        *frm++ = 0; *frm++ = 0;        /* TODO: ATIM window */
        bo->bo_tim_len = 0;
	} else {
        struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;

        tie->tim_ie = IEEE80211_ELEMID_TIM;
        tie->tim_len = 4;    /* length */
        tie->tim_count = 0;    /* DTIM count */ 
        tie->tim_period = vap->iv_dtim_period;    /* DTIM period */
        tie->tim_bitctl = 0;    /* bitmap control */
        tie->tim_bitmap[0] = 0;    /* Partial Virtual Bitmap */
        frm += sizeof(struct ieee80211_tim_ie);
        bo->bo_tim_len = 1;
    }
    bo->bo_tim_trailer = frm;

    if (IEEE80211_IS_COUNTRYIE_ENABLED(ic)) {
        frm = ieee80211_add_country(frm, vap);
    }

    if (ieee80211_ic_doth_is_set(ic) && ieee80211_vap_doth_is_set(vap)) {
        *frm++ = IEEE80211_ELEMID_PWRCNSTR;
        *frm++ = 1;
        *frm++ = IEEE80211_PWRCONSTRAINT_VAL(vap);
    }
    bo->bo_chanswitch = frm;

#if ATH_SUPPORT_IBSS_DFS
    if (vap->iv_opmode == IEEE80211_M_IBSS) {
        if (ieee80211_ibss_dfs_element_enable(vap, ic)) {
            ieee80211_build_ibss_dfs_ie(vap);
            bo->bo_ibssdfs = frm;
            frm =  ieee80211_add_ibss_dfs(frm,vap);
        } else {
            bo->bo_ibssdfs = NULL;
            OS_MEMZERO(&vap->iv_ibssdfs_ie_data, sizeof(struct ieee80211_ibssdfs_ie));
        }
    }
#endif /* ATH_SUPPORT_IBSS_DFS */
    enable_htrates = ieee80211vap_htallowed(vap);

    if (IEEE80211_IS_CHAN_ANYG(vap->iv_bsschan) ||
        IEEE80211_IS_CHAN_11NG(vap->iv_bsschan)) {
        bo->bo_erp = frm;
        frm = ieee80211_add_erp(frm, ic);
    }

    /*
     * check if os shim has setup RSN IE it self.
     */
    IEEE80211_VAP_LOCK(vap);
    if (vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].length) {
        add_wpa_ie = ieee80211_check_wpaie(vap, vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].ie,
                                           vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].length);
    }
    if (vap->iv_opt_ie.length) {
        add_wpa_ie = ieee80211_check_wpaie(vap, vap->iv_opt_ie.ie,
                                           vap->iv_opt_ie.length);
    }
    IEEE80211_VAP_UNLOCK(vap);

    /* XXX: put IEs in the order of element IDs. */
    if (add_wpa_ie) {
        if (RSN_AUTH_IS_RSNA(rsn))
            frm = ieee80211_setup_rsn_ie(vap, frm);
    }
    
#if ATH_SUPPORT_WAPI
    if (RSN_AUTH_IS_WAI(rsn))
        frm = ieee80211_setup_wapi_ie(vap, frm);
#endif

    frm = ieee80211_add_xrates(frm, rs, ic);

#ifdef E_CSA
    bo->bo_extchanswitch = frm;
#endif /* E_CSA */
    
    /*
     * HT cap. check for vap is done in ieee80211vap_htallowed.
     * TBD: remove iv_bsschan check to support multiple channel operation.
     */
    if (IEEE80211_IS_CHAN_11N(vap->iv_bsschan) && enable_htrates) {
        bo->bo_htcap = frm;
        frm = ieee80211_add_htcap(frm, ni, IEEE80211_FC0_SUBTYPE_BEACON);

        bo->bo_htinfo = frm;
        frm = ieee80211_add_htinfo(frm, ni);

        if (!(ic->ic_flags & IEEE80211_F_COEXT_DISABLE)) {
            bo->bo_obss_scan = frm;
            frm = ieee80211_add_obss_scan(frm, ni);
            bo->bo_extcap = frm;
            frm = ieee80211_add_extcap(frm, ni);
        }
    }

    if (add_wpa_ie) {
        if (RSN_AUTH_IS_WPA(rsn))
            frm = ieee80211_setup_wpa_ie(vap, frm);
    }

    if (ieee80211_vap_wme_is_set(vap) &&
        (vap->iv_opmode == IEEE80211_M_HOSTAP || 
#if ATH_SUPPORT_IBSS_WMM
         vap->iv_opmode == IEEE80211_M_IBSS || 
#endif
         vap->iv_opmode == IEEE80211_M_BTAMP)) {
            
        bo->bo_wme = frm;
        frm = ieee80211_add_wme_param(frm, &ic->ic_wme, IEEE80211_VAP_IS_UAPSD_ENABLED(vap));
        vap->iv_flags &= ~IEEE80211_F_WMEUPDATE;
    }
    
    if ((IEEE80211_IS_CHAN_11N(vap->iv_bsschan)) && IEEE80211_IS_HTVIE_ENABLED(ic) && enable_htrates) {
        frm = ieee80211_add_htcap_vendor_specific(frm, ni,IEEE80211_FC0_SUBTYPE_BEACON);

        bo->bo_htinfo_vendor_specific = frm;
        frm = ieee80211_add_htinfo_vendor_specific(frm, ni);
    }

    bo->bo_ath_caps = frm;
    if (vap->iv_bss && vap->iv_bss->ni_ath_flags) {
        frm = ieee80211_add_athAdvCap(frm, vap->iv_bss->ni_ath_flags,
                                      vap->iv_bss->ni_ath_defkeyindex);
    } else {
        frm = ieee80211_add_athAdvCap(frm, 0, IEEE80211_INVAL_DEFKEY);
    }

    /* Insert ieee80211_ie_ath_extcap IE to beacon */
    if (ic->ic_ath_extcap)
        frm = ieee80211_add_athextcap(frm, ic->ic_ath_extcap, ic->ic_weptkipaggr_rxdelim);

    bo->bo_xr = frm;

    bo->bo_appie_buf = frm;
    bo->bo_appie_buf_len = 0;

    IEEE80211_VAP_LOCK(vap);
    if (vap->iv_opt_ie.length) {
        OS_MEMCPY(frm, vap->iv_opt_ie.ie,
                  vap->iv_opt_ie.length);
        frm += vap->iv_opt_ie.length;
    }

    if (vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].length > 0) {
        OS_MEMCPY(frm,vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].ie,
                  vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].length);
        frm += vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].length;
        bo->bo_appie_buf_len = vap->iv_app_ie[IEEE80211_FRAME_TYPE_BEACON].length;
    }

    /* Add the Application IE's */
    frm = ieee80211_mlme_app_ie_append(vap, IEEE80211_FRAME_TYPE_BEACON, frm);
    bo->bo_appie_buf_len += vap->iv_app_ie_list[IEEE80211_FRAME_TYPE_BEACON].total_ie_len;
    IEEE80211_VAP_UNLOCK(vap);

    bo->bo_tim_trailerlen = frm - bo->bo_tim_trailer;
    bo->bo_chanswitch_trailerlen = frm - bo->bo_chanswitch;
#ifdef E_CSA
    bo->bo_extchanswitch_trailerlen = frm - bo->bo_extchanswitch;
#endif /* E_CSA */
#if ATH_SUPPORT_IBSS_DFS
    if (vap->iv_opmode == IEEE80211_M_IBSS &&
        (bo->bo_ibssdfs != NULL)) {
        struct ieee80211_ibssdfs_ie * ibss_dfs_ie = (struct ieee80211_ibssdfs_ie *)bo->bo_ibssdfs;
        bo->bo_ibssdfs_trailerlen = frm - (bo->bo_ibssdfs + 2 + ibss_dfs_ie->len);
    }
#endif /* ATH_SUPPORT_IBSS_DFS */
    return frm;
}