FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/src/linux_80211.c

     /*-
      * Copyright (c) 2020-2022 The FreeBSD Foundation
      * Copyright (c) 2020-2022 Bjoern A. Zeeb
      *
      * This software was developed by Björn Zeeb under sponsorship from
      * the FreeBSD Foundation.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Public functions are called linuxkpi_*().
     * Internal (static) functions are called lkpi_*().
     *
     * The internal structures holding metadata over public structures are also
     * called lkpi_xxx (usually with a member at the end called xxx).
     * Note: we do not replicate the structure names but the general variable names
     * for these (e.g., struct hw -> struct lkpi_hw, struct sta -> struct lkpi_sta).
     * There are macros to access one from the other.
     * We call the internal versions lxxx (e.g., hw -> lhw, sta -> lsta).
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/types.h>
    #include <sys/kernel.h>
    #include <sys/errno.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    #include <sys/mutex.h>
    #include <sys/socket.h>
    #include <sys/sysctl.h>
    #include <sys/queue.h>
    #include <sys/taskqueue.h>
    #include <sys/libkern.h>
    
    #include <net/if.h>
    #include <net/if_var.h>
    #include <net/if_media.h>
    #include <net/ethernet.h>
    
    #include <net80211/ieee80211_var.h>
    #include <net80211/ieee80211_proto.h>
    #include <net80211/ieee80211_ratectl.h>
    #include <net80211/ieee80211_radiotap.h>
    
    #define LINUXKPI_NET80211
    #include <net/mac80211.h>
    
    #include <linux/workqueue.h>
    #include "linux_80211.h"
    
    #define LKPI_80211_WME
    /* #define      LKPI_80211_HW_CRYPTO */
    
    static MALLOC_DEFINE(M_LKPI80211, "lkpi80211", "LinuxKPI 80211 compat");
    
    /* -------------------------------------------------------------------------- */
    
    /* Keep public for as long as header files are using it too. */
    int linuxkpi_debug_80211;
    
    #ifdef LINUXKPI_DEBUG_80211
    SYSCTL_DECL(_compat_linuxkpi);
    SYSCTL_NODE(_compat_linuxkpi, OID_AUTO, 80211, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
        "LinuxKPI 802.11 compatibility layer");
    
    SYSCTL_INT(_compat_linuxkpi_80211, OID_AUTO, debug, CTLFLAG_RWTUN,
        &linuxkpi_debug_80211, 0, "LinuxKPI 802.11 debug level");
    
    #define UNIMPLEMENTED           if (linuxkpi_debug_80211 & D80211_TODO)         \
        printf("XXX-TODO %s:%d: UNIMPLEMENTED\n", __func__, __LINE__)
    #define TRACEOK()               if (linuxkpi_debug_80211 & D80211_TRACEOK)      \
        printf("XXX-TODO %s:%d: TRACEPOINT\n", __func__, __LINE__)
    #else
    #define UNIMPLEMENTED           do { } while (0)
    #define TRACEOK()               do { } while (0)
    #endif
   
   /* #define      PREP_TX_INFO_DURATION   (IEEE80211_TRANS_WAIT * 1000) */
   #ifndef PREP_TX_INFO_DURATION
   #define PREP_TX_INFO_DURATION   0 /* Let the driver do its thing. */
   #endif
   
   /* c.f. ieee80211_ioctl.c */
   static const uint8_t zerobssid[IEEE80211_ADDR_LEN];
   
   /* This is DSAP | SSAP | CTRL | ProtoID/OrgCode{3}. */
   const uint8_t rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
   
   /* IEEE 802.11-05/0257r1 */
   const uint8_t bridge_tunnel_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
   
   const uint8_t tid_to_mac80211_ac[] = {
           IEEE80211_AC_BE,
           IEEE80211_AC_BK,
           IEEE80211_AC_BK,
           IEEE80211_AC_BE,
           IEEE80211_AC_VI,
           IEEE80211_AC_VI,
           IEEE80211_AC_VO,
           IEEE80211_AC_VO,
   #if 0
           IEEE80211_AC_VO, /* We treat MGMT as TID 8, which is set as AC_VO */
   #endif
   };
   
   const struct cfg80211_ops linuxkpi_mac80211cfgops = {
           /*
            * XXX TODO need a "glue layer" to link cfg80211 ops to
            * mac80211 and to the driver or net80211.
            * Can we pass some on 1:1? Need to compare the (*f)().
            */
   };
   
   static struct lkpi_sta *lkpi_find_lsta_by_ni(struct lkpi_vif *,
       struct ieee80211_node *);
   static void lkpi_80211_txq_task(void *, int);
   static void lkpi_ieee80211_free_skb_mbuf(void *);
   #ifdef LKPI_80211_WME
   static int lkpi_wme_update(struct lkpi_hw *, struct ieee80211vap *, bool);
   #endif
   
   static void
   lkpi_lsta_dump(struct lkpi_sta *lsta, struct ieee80211_node *ni,
       const char *_f, int _l)
   {
   
   #ifdef LINUXKPI_DEBUG_80211
           if ((linuxkpi_debug_80211 & D80211_TRACE_STA) == 0)
                   return;
           if (lsta == NULL)
                   return;
   
           printf("%s:%d lsta %p ni %p sta %p\n",
               _f, _l, lsta, ni, &lsta->sta);
           if (ni != NULL)
                   ieee80211_dump_node(NULL, ni);
           printf("\ttxq_task txq len %d mtx\n", mbufq_len(&lsta->txq));
           printf("\tkc %p state %d added_to_drv %d in_mgd %d\n",
                   lsta->kc, lsta->state, lsta->added_to_drv, lsta->in_mgd);
   #endif
   }
   
   static void
   lkpi_lsta_remove(struct lkpi_sta *lsta, struct lkpi_vif *lvif)
   {
           struct ieee80211_node *ni;
   
           ni = lsta->ni;
   
           LKPI_80211_LVIF_LOCK(lvif);
           TAILQ_REMOVE(&lvif->lsta_head, lsta, lsta_entry);
           LKPI_80211_LVIF_UNLOCK(lvif);
   
           lsta->ni = NULL;
           ni->ni_drv_data = NULL;
           if (ni != NULL)
                   ieee80211_free_node(ni);
   
           IMPROVE("more from lkpi_ic_node_free() should happen here.");
   
           free(lsta, M_LKPI80211);
   }
   
   static struct lkpi_sta *
   lkpi_lsta_alloc(struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN],
       struct ieee80211_hw *hw, struct ieee80211_node *ni)
   {
           struct lkpi_sta *lsta;
           struct lkpi_vif *lvif;
           struct ieee80211_vif *vif;
           struct ieee80211_sta *sta;
           int band, i, tid;
   
           lsta = malloc(sizeof(*lsta) + hw->sta_data_size, M_LKPI80211,
               M_NOWAIT | M_ZERO);
           if (lsta == NULL)
                   return (NULL);
   
           lsta->added_to_drv = false;
           lsta->state = IEEE80211_STA_NOTEXIST;
   #if 0
           /*
            * This needs to be done in node_init() as ieee80211_alloc_node()
            * will initialise the refcount after us.
            */
           lsta->ni = ieee80211_ref_node(ni);
   #endif
           /* The back-pointer "drv_data" to net80211_node let's us get lsta. */
           ni->ni_drv_data = lsta;
   
           lvif = VAP_TO_LVIF(vap);
           vif = LVIF_TO_VIF(lvif);
           sta = LSTA_TO_STA(lsta);
   
           IEEE80211_ADDR_COPY(sta->addr, mac);
   
           /* TXQ */
           for (tid = 0; tid < nitems(sta->txq); tid++) {
                   struct lkpi_txq *ltxq;
   
                   /* We are not limiting ourselves to hw.queues here. */
                   ltxq = malloc(sizeof(*ltxq) + hw->txq_data_size,
                       M_LKPI80211, M_NOWAIT | M_ZERO);
                   if (ltxq == NULL)
                           goto cleanup;
                   /* iwlwifi//mvm/sta.c::tid_to_mac80211_ac[] */
                   if (tid == IEEE80211_NUM_TIDS) {
                           if (!ieee80211_hw_check(hw, STA_MMPDU_TXQ)) {
                                   free(ltxq, M_LKPI80211);
                                   continue;
                           }
                           IMPROVE("AP/if we support non-STA here too");
                           ltxq->txq.ac = IEEE80211_AC_VO;
                   } else {
                           ltxq->txq.ac = tid_to_mac80211_ac[tid & 7];
                   }
                   ltxq->seen_dequeue = false;
                   ltxq->txq.vif = vif;
                   ltxq->txq.tid = tid;
                   ltxq->txq.sta = sta;
                   skb_queue_head_init(&ltxq->skbq);
                   sta->txq[tid] = &ltxq->txq;
           }
   
           /* Deflink information. */
           for (band = 0; band < NUM_NL80211_BANDS; band++) {
                   struct ieee80211_supported_band *supband;
   
                   supband = hw->wiphy->bands[band];
                   if (supband == NULL)
                           continue;
   
                   for (i = 0; i < supband->n_bitrates; i++) {
   
                           IMPROVE("Further supband->bitrates[i]* checks?");
                           /* or should we get them from the ni? */
                           sta->deflink.supp_rates[band] |= BIT(i);
                   }
           }
           IMPROVE("ht, vht, he, ... bandwidth, smps_mode, ..");
           /* bandwidth = IEEE80211_STA_RX_... */
   
           /* Deferred TX path. */
           mtx_init(&lsta->txq_mtx, "lsta_txq", NULL, MTX_DEF);
           TASK_INIT(&lsta->txq_task, 0, lkpi_80211_txq_task, lsta);
           mbufq_init(&lsta->txq, IFQ_MAXLEN);
   
           return (lsta);
   
   cleanup:
           for (; tid >= 0; tid--)
                   free(sta->txq[tid], M_LKPI80211);
           free(lsta, M_LKPI80211);
           return (NULL);
   }
   
   static enum nl80211_band
   lkpi_net80211_chan_to_nl80211_band(struct ieee80211_channel *c)
   {
   
           if (IEEE80211_IS_CHAN_2GHZ(c))
                   return (NL80211_BAND_2GHZ);
           else if (IEEE80211_IS_CHAN_5GHZ(c))
                   return (NL80211_BAND_5GHZ);
   #ifdef __notyet__
           else if ()
                   return (NL80211_BAND_6GHZ);
           else if ()
                   return (NL80211_BAND_60GHZ);
           else if (IEEE80211_IS_CHAN_GSM(c))
                   return (NL80211_BAND_XXX);
   #endif
           else
                   panic("%s: unsupported band. c %p flags %#x\n",
                       __func__, c, c->ic_flags);
   }
   
   static uint32_t
   lkpi_nl80211_band_to_net80211_band(enum nl80211_band band)
   {
   
           /* XXX-BZ this is just silly; net80211 is too convoluted. */
           /* IEEE80211_CHAN_A / _G / .. doesn't really work either. */
           switch (band) {
           case NL80211_BAND_2GHZ:
                   return (IEEE80211_CHAN_2GHZ);
                   break;
           case NL80211_BAND_5GHZ:
                   return (IEEE80211_CHAN_5GHZ);
                   break;
           case NL80211_BAND_60GHZ:
                   break;
           case NL80211_BAND_6GHZ:
                   break;
           default:
                   panic("%s: unsupported band %u\n", __func__, band);
                   break;
           }
   
           IMPROVE();
           return (0x00);
   }
   
   #if 0
   static enum ieee80211_ac_numbers
   lkpi_ac_net_to_l80211(int ac)
   {
   
           switch (ac) {
           case WME_AC_VO:
                   return (IEEE80211_AC_VO);
           case WME_AC_VI:
                   return (IEEE80211_AC_VI);
           case WME_AC_BE:
                   return (IEEE80211_AC_BE);
           case WME_AC_BK:
                   return (IEEE80211_AC_BK);
           default:
                   printf("%s: invalid WME_AC_* input: ac = %d\n", __func__, ac);
                   return (IEEE80211_AC_BE);
           }
   }
   #endif
   
   static enum nl80211_iftype
   lkpi_opmode_to_vif_type(enum ieee80211_opmode opmode)
   {
   
           switch (opmode) {
           case IEEE80211_M_IBSS:
                   return (NL80211_IFTYPE_ADHOC);
                   break;
           case IEEE80211_M_STA:
                   return (NL80211_IFTYPE_STATION);
                   break;
           case IEEE80211_M_WDS:
                   return (NL80211_IFTYPE_WDS);
                   break;
           case IEEE80211_M_HOSTAP:
                   return (NL80211_IFTYPE_AP);
                   break;
           case IEEE80211_M_MONITOR:
                   return (NL80211_IFTYPE_MONITOR);
                   break;
           case IEEE80211_M_MBSS:
                   return (NL80211_IFTYPE_MESH_POINT);
                   break;
           case IEEE80211_M_AHDEMO:
                   /* FALLTHROUGH */
           default:
                   printf("ERROR: %s: unsupported opmode %d\n", __func__, opmode);
                   /* FALLTHROUGH */
           }
           return (NL80211_IFTYPE_UNSPECIFIED);
   }
   
   #ifdef LKPI_80211_HW_CRYPTO
   static uint32_t
   lkpi_l80211_to_net80211_cyphers(uint32_t wlan_cipher_suite)
   {
   
           switch (wlan_cipher_suite) {
           case WLAN_CIPHER_SUITE_WEP40:
                   return (IEEE80211_CRYPTO_WEP);
           case WLAN_CIPHER_SUITE_TKIP:
                   return (IEEE80211_CRYPTO_TKIP);
           case WLAN_CIPHER_SUITE_CCMP:
                   return (IEEE80211_CIPHER_AES_CCM);
           case WLAN_CIPHER_SUITE_WEP104:
                   return (IEEE80211_CRYPTO_WEP);
           case WLAN_CIPHER_SUITE_AES_CMAC:
           case WLAN_CIPHER_SUITE_GCMP:
           case WLAN_CIPHER_SUITE_GCMP_256:
           case WLAN_CIPHER_SUITE_CCMP_256:
           case WLAN_CIPHER_SUITE_BIP_GMAC_128:
           case WLAN_CIPHER_SUITE_BIP_GMAC_256:
           case WLAN_CIPHER_SUITE_BIP_CMAC_256:
                   printf("%s: unsupported WLAN Cipher Suite %#08x | %u\n", __func__,
                       wlan_cipher_suite >> 8, wlan_cipher_suite & 0xff);
                   break;
           default:
                   printf("%s: unknown WLAN Cipher Suite %#08x | %u\n", __func__,
                       wlan_cipher_suite >> 8, wlan_cipher_suite & 0xff);
           }
   
           return (0);
   }
   
   static uint32_t
   lkpi_net80211_to_l80211_cipher_suite(uint32_t cipher, uint8_t keylen)
   {
   
           switch (cipher) {
           case IEEE80211_CIPHER_TKIP:
                   return (WLAN_CIPHER_SUITE_TKIP);
           case IEEE80211_CIPHER_AES_CCM:
                   return (WLAN_CIPHER_SUITE_CCMP);
           case IEEE80211_CIPHER_WEP:
                   if (keylen < 8)
                           return (WLAN_CIPHER_SUITE_WEP40);
                   else
                           return (WLAN_CIPHER_SUITE_WEP104);
                   break;
           case IEEE80211_CIPHER_AES_OCB:
           case IEEE80211_CIPHER_TKIPMIC:
           case IEEE80211_CIPHER_CKIP:
           case IEEE80211_CIPHER_NONE:
                   printf("%s: unsupported cipher %#010x\n", __func__, cipher);
                   break;
           default:
                   printf("%s: unknown cipher %#010x\n", __func__, cipher);
           };
           return (0);
   }
   #endif
   
   #ifdef __notyet__
   static enum ieee80211_sta_state
   lkpi_net80211_state_to_sta_state(enum ieee80211_state state)
   {
   
           /*
            * XXX-BZ The net80211 states are "try to ..", the lkpi8011 states are
            * "done".  Also ASSOC/AUTHORIZED are both "RUN" then?
            */
           switch (state) {
           case IEEE80211_S_INIT:
                   return (IEEE80211_STA_NOTEXIST);
           case IEEE80211_S_SCAN:
                   return (IEEE80211_STA_NONE);
           case IEEE80211_S_AUTH:
                   return (IEEE80211_STA_AUTH);
           case IEEE80211_S_ASSOC:
                   return (IEEE80211_STA_ASSOC);
           case IEEE80211_S_RUN:
                   return (IEEE80211_STA_AUTHORIZED);
           case IEEE80211_S_CAC:
           case IEEE80211_S_CSA:
           case IEEE80211_S_SLEEP:
           default:
                   UNIMPLEMENTED;
           };
   
           return (IEEE80211_STA_NOTEXIST);
   }
   #endif
   
   static struct linuxkpi_ieee80211_channel *
   lkpi_find_lkpi80211_chan(struct lkpi_hw *lhw,
       struct ieee80211_channel *c)
   {
           struct ieee80211_hw *hw;
           struct linuxkpi_ieee80211_channel *channels;
           enum nl80211_band band;
           int i, nchans;
   
           hw = LHW_TO_HW(lhw);
           band = lkpi_net80211_chan_to_nl80211_band(c);
           if (hw->wiphy->bands[band] == NULL)
                   return (NULL);
   
           nchans = hw->wiphy->bands[band]->n_channels;
           if (nchans <= 0)
                   return (NULL);
   
           channels = hw->wiphy->bands[band]->channels;
           for (i = 0; i < nchans; i++) {
                   if (channels[i].hw_value == c->ic_ieee)
                           return (&channels[i]);
           }
   
           return (NULL);
   }
   
   static struct linuxkpi_ieee80211_channel *
   lkpi_get_lkpi80211_chan(struct ieee80211com *ic, struct ieee80211_node *ni)
   {
           struct linuxkpi_ieee80211_channel *chan;
           struct ieee80211_channel *c;
           struct lkpi_hw *lhw;
   
           chan = NULL;
           if (ni != NULL && ni->ni_chan != IEEE80211_CHAN_ANYC)
                   c = ni->ni_chan;
           else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
                   c = ic->ic_bsschan;
           else if (ic->ic_curchan != IEEE80211_CHAN_ANYC)
                   c = ic->ic_curchan;
           else
                   c = NULL;
   
           if (c != NULL && c != IEEE80211_CHAN_ANYC) {
                   lhw = ic->ic_softc;
                   chan = lkpi_find_lkpi80211_chan(lhw, c);
           }
   
           return (chan);
   }
   
   struct linuxkpi_ieee80211_channel *
   linuxkpi_ieee80211_get_channel(struct wiphy *wiphy, uint32_t freq)
   {
           enum nl80211_band band;
   
           for (band = 0; band < NUM_NL80211_BANDS; band++) {
                   struct ieee80211_supported_band *supband;
                   struct linuxkpi_ieee80211_channel *channels;
                   int i;
   
                   supband = wiphy->bands[band];
                   if (supband == NULL || supband->n_channels == 0)
                           continue;
   
                   channels = supband->channels;
                   for (i = 0; i < supband->n_channels; i++) {
                           if (channels[i].center_freq == freq)
                                   return (&channels[i]);
                   }
           }
   
           return (NULL);
   }
   
   #ifdef LKPI_80211_HW_CRYPTO
   static int
   _lkpi_iv_key_set_delete(struct ieee80211vap *vap, const struct ieee80211_key *k,
       enum set_key_cmd cmd)
   {
           struct ieee80211com *ic;
           struct lkpi_hw *lhw;
           struct ieee80211_hw *hw;
           struct lkpi_vif *lvif;
           struct ieee80211_vif *vif;
           struct ieee80211_sta *sta;
           struct ieee80211_node *ni;
           struct ieee80211_key_conf *kc;
           int error;
   
           /* XXX TODO Check (k->wk_flags & IEEE80211_KEY_SWENCRYPT) and don't upload to driver/hw? */
   
           ic = vap->iv_ic;
           lhw = ic->ic_softc;
           hw = LHW_TO_HW(lhw);
           lvif = VAP_TO_LVIF(vap);
           vif = LVIF_TO_VIF(lvif);
   
           memset(&kc, 0, sizeof(kc));
           kc = malloc(sizeof(*kc) + k->wk_keylen, M_LKPI80211, M_WAITOK | M_ZERO);
           kc->cipher = lkpi_net80211_to_l80211_cipher_suite(
               k->wk_cipher->ic_cipher, k->wk_keylen);
           kc->keyidx = k->wk_keyix;
   #if 0
           kc->hw_key_idx = /* set by hw and needs to be passed for TX */;
   #endif
           atomic64_set(&kc->tx_pn, k->wk_keytsc);
           kc->keylen = k->wk_keylen;
           memcpy(kc->key, k->wk_key, k->wk_keylen);
   
           switch (kc->cipher) {
           case WLAN_CIPHER_SUITE_CCMP:
                   kc->iv_len = k->wk_cipher->ic_header;
                   kc->icv_len = k->wk_cipher->ic_trailer;
                   break;
           case WLAN_CIPHER_SUITE_TKIP:
           default:
                   IMPROVE();
                   return (0);
           };
   
           ni = vap->iv_bss;
           sta = ieee80211_find_sta(vif, ni->ni_bssid);
           if (sta != NULL) {
                   struct lkpi_sta *lsta;
   
                   lsta = STA_TO_LSTA(sta);
                   lsta->kc = kc;
           }
   
           error = lkpi_80211_mo_set_key(hw, cmd, vif, sta, kc);
           if (error != 0) {
                   /* XXX-BZ leaking kc currently */
                   ic_printf(ic, "%s: set_key failed: %d\n", __func__, error);
                   return (0);
           } else {
                   ic_printf(ic, "%s: set_key succeeded: keyidx %u hw_key_idx %u "
                       "flags %#10x\n", __func__,
                       kc->keyidx, kc->hw_key_idx, kc->flags);
                   return (1);
           }
   }
   
   static int
   lkpi_iv_key_delete(struct ieee80211vap *vap, const struct ieee80211_key *k)
   {
   
           /* XXX-BZ one day we should replace this iterating over VIFs, or node list? */
           return (_lkpi_iv_key_set_delete(vap, k, DISABLE_KEY));
   }
   static  int
   lkpi_iv_key_set(struct ieee80211vap *vap, const struct ieee80211_key *k)
   {
   
           return (_lkpi_iv_key_set_delete(vap, k, SET_KEY));
   }
   #endif
   
   static u_int
   lkpi_ic_update_mcast_copy(void *arg, struct sockaddr_dl *sdl, u_int cnt)
   {
           struct netdev_hw_addr_list *mc_list;
           struct netdev_hw_addr *addr;
   
           KASSERT(arg != NULL && sdl != NULL, ("%s: arg %p sdl %p cnt %u\n",
               __func__, arg, sdl, cnt));
   
           mc_list = arg;
           /* If it is on the list already skip it. */
           netdev_hw_addr_list_for_each(addr, mc_list) {
                   if (!memcmp(addr->addr, LLADDR(sdl), sdl->sdl_alen))
                           return (0);
           }
   
           addr = malloc(sizeof(*addr), M_LKPI80211, M_NOWAIT | M_ZERO);
           if (addr == NULL)
                   return (0);
   
           INIT_LIST_HEAD(&addr->addr_list);
           memcpy(addr->addr, LLADDR(sdl), sdl->sdl_alen);
           /* XXX this should be a netdev function? */
           list_add(&addr->addr_list, &mc_list->addr_list);
           mc_list->count++;
   
   #ifdef LINUXKPI_DEBUG_80211
           if (linuxkpi_debug_80211 & D80211_TRACE)
                   printf("%s:%d: mc_list count %d: added %6D\n",
                       __func__, __LINE__, mc_list->count, addr->addr, ":");
   #endif
   
           return (1);
   }
   
   static void
   lkpi_update_mcast_filter(struct ieee80211com *ic, bool force)
   {
           struct lkpi_hw *lhw;
           struct ieee80211_hw *hw;
           struct netdev_hw_addr_list mc_list;
           struct list_head *le, *next;
           struct netdev_hw_addr *addr;
           struct ieee80211vap *vap;
           u64 mc;
           unsigned int changed_flags, total_flags;
   
           lhw = ic->ic_softc;
   
           if (lhw->ops->prepare_multicast == NULL ||
               lhw->ops->configure_filter == NULL)
                   return;
   
           if (!lhw->update_mc && !force)
                   return;
   
           changed_flags = total_flags = 0;
           mc_list.count = 0;
           INIT_LIST_HEAD(&mc_list.addr_list);
           if (ic->ic_allmulti == 0) {
                   TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
                           if_foreach_llmaddr(vap->iv_ifp,
                               lkpi_ic_update_mcast_copy, &mc_list);
           } else {
                   changed_flags |= FIF_ALLMULTI;
           }
   
           hw = LHW_TO_HW(lhw);
           mc = lkpi_80211_mo_prepare_multicast(hw, &mc_list);
           /*
            * XXX-BZ make sure to get this sorted what is a change,
            * what gets all set; what was already set?
            */
           total_flags = changed_flags;
           lkpi_80211_mo_configure_filter(hw, changed_flags, &total_flags, mc);
   
   #ifdef LINUXKPI_DEBUG_80211
           if (linuxkpi_debug_80211 & D80211_TRACE)
                   printf("%s: changed_flags %#06x count %d total_flags %#010x\n",
                       __func__, changed_flags, mc_list.count, total_flags);
   #endif
   
           if (mc_list.count != 0) {
                   list_for_each_safe(le, next, &mc_list.addr_list) {
                           addr = list_entry(le, struct netdev_hw_addr, addr_list);
                           free(addr, M_LKPI80211);
                           mc_list.count--;
                   }
           }
           KASSERT(mc_list.count == 0, ("%s: mc_list %p count %d != 0\n",
               __func__, &mc_list, mc_list.count));
   }
   
   static enum ieee80211_bss_changed
   lkpi_update_dtim_tsf(struct ieee80211_vif *vif, struct ieee80211_node *ni,
       struct ieee80211vap *vap, const char *_f, int _l)
   {
           enum ieee80211_bss_changed bss_changed;
   
           bss_changed = 0;
   
   #ifdef LINUXKPI_DEBUG_80211
           if (linuxkpi_debug_80211 & D80211_TRACE)
                   printf("%s:%d [%s:%d] assoc %d aid %d beacon_int %u "
                       "dtim_period %u sync_dtim_count %u sync_tsf %ju "
                       "sync_device_ts %u bss_changed %#08x\n",
                           __func__, __LINE__, _f, _l,
                           vif->bss_conf.assoc, vif->bss_conf.aid,
                           vif->bss_conf.beacon_int, vif->bss_conf.dtim_period,
                           vif->bss_conf.sync_dtim_count,
                           (uintmax_t)vif->bss_conf.sync_tsf,
                           vif->bss_conf.sync_device_ts,
                           bss_changed);
   #endif
   
           if (vif->bss_conf.beacon_int != ni->ni_intval) {
                   vif->bss_conf.beacon_int = ni->ni_intval;
                   /* iwlwifi FW bug workaround; iwl_mvm_mac_sta_state. */
                   if (vif->bss_conf.beacon_int < 16)
                           vif->bss_conf.beacon_int = 16;
                   bss_changed |= BSS_CHANGED_BEACON_INT;
           }
           if (vif->bss_conf.dtim_period != vap->iv_dtim_period &&
               vap->iv_dtim_period > 0) {
                   vif->bss_conf.dtim_period = vap->iv_dtim_period;
                   bss_changed |= BSS_CHANGED_BEACON_INFO;
           }
   
           vif->bss_conf.sync_dtim_count = vap->iv_dtim_count;
           vif->bss_conf.sync_tsf = le64toh(ni->ni_tstamp.tsf);
           /* vif->bss_conf.sync_device_ts = set in linuxkpi_ieee80211_rx. */
   
   #ifdef LINUXKPI_DEBUG_80211
           if (linuxkpi_debug_80211 & D80211_TRACE)
                   printf("%s:%d [%s:%d] assoc %d aid %d beacon_int %u "
                       "dtim_period %u sync_dtim_count %u sync_tsf %ju "
                       "sync_device_ts %u bss_changed %#08x\n",
                           __func__, __LINE__, _f, _l,
                           vif->bss_conf.assoc, vif->bss_conf.aid,
                           vif->bss_conf.beacon_int, vif->bss_conf.dtim_period,
                           vif->bss_conf.sync_dtim_count,
                           (uintmax_t)vif->bss_conf.sync_tsf,
                           vif->bss_conf.sync_device_ts,
                           bss_changed);
   #endif
   
           return (bss_changed);
   }
   
   static void
   lkpi_stop_hw_scan(struct lkpi_hw *lhw, struct ieee80211_vif *vif)
   {
           struct ieee80211_hw *hw;
           int error;
   
           if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) == 0)
                   return;
   
           hw = LHW_TO_HW(lhw);
   
           IEEE80211_UNLOCK(lhw->ic);
           LKPI_80211_LHW_LOCK(lhw);
           /* Need to cancel the scan. */
           lkpi_80211_mo_cancel_hw_scan(hw, vif);
   
           /* Need to make sure we see ieee80211_scan_completed. */
           error = msleep(lhw, &lhw->mtx, 0, "lhwscanstop", hz/2);
           LKPI_80211_LHW_UNLOCK(lhw);
           IEEE80211_LOCK(lhw->ic);
   
           if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) != 0)
                   ic_printf(lhw->ic, "%s: failed to cancel scan: %d (%p, %p)\n",
                       __func__, error, lhw, vif);
   }
   
   static void
   lkpi_hw_conf_idle(struct ieee80211_hw *hw, bool new)
   {
           struct lkpi_hw *lhw;
           int error;
           bool old;
   
           old = hw->conf.flags & IEEE80211_CONF_IDLE;
           if (old == new)
                   return;
   
           hw->conf.flags ^= IEEE80211_CONF_IDLE;
           error = lkpi_80211_mo_config(hw, IEEE80211_CONF_CHANGE_IDLE);
           if (error != 0 && error != EOPNOTSUPP) {
                   lhw = HW_TO_LHW(hw);
                   ic_printf(lhw->ic, "ERROR: %s: config %#0x returned %d\n",
                       __func__, IEEE80211_CONF_CHANGE_IDLE, error);
           }
   }
   
   static void
   lkpi_disassoc(struct ieee80211_sta *sta, struct ieee80211_vif *vif,
       struct lkpi_hw *lhw)
   {
           sta->aid = 0;
           if (vif->bss_conf.assoc) {
                   struct ieee80211_hw *hw;
                   enum ieee80211_bss_changed changed;
   
                   lhw->update_mc = true;
                   lkpi_update_mcast_filter(lhw->ic, true);
   
                   changed = 0;
                   vif->bss_conf.assoc = false;
                   vif->bss_conf.aid = 0;
                   changed |= BSS_CHANGED_ASSOC;
                   /*
                    * This will remove the sta from firmware for iwlwifi.
                    * So confusing that they use state and flags and ... ^%$%#%$^.
                    */
                   IMPROVE();
                   hw = LHW_TO_HW(lhw);
                   lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf,
                       changed);
   
                   lkpi_hw_conf_idle(hw, true);
           }
   }
   
   static void
   lkpi_wake_tx_queues(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
       bool dequeue_seen, bool no_emptyq)
   {
           struct lkpi_txq *ltxq;
           int tid;
   
           /* Wake up all queues to know they are allocated in the driver. */
           for (tid = 0; tid < nitems(sta->txq); tid++) {
   
                           if (tid == IEEE80211_NUM_TIDS) {
                                   IMPROVE("station specific?");
                                   if (!ieee80211_hw_check(hw, STA_MMPDU_TXQ))
                                           continue;
                           } else if (tid >= hw->queues)
                                   continue;
   
                           if (sta->txq[tid] == NULL)
                                   continue;
   
                           ltxq = TXQ_TO_LTXQ(sta->txq[tid]);
                           if (dequeue_seen && !ltxq->seen_dequeue)
                                   continue;
   
                           if (no_emptyq && skb_queue_empty(&ltxq->skbq))
                                   continue;
   
                           lkpi_80211_mo_wake_tx_queue(hw, sta->txq[tid]);
           }
   }
   
   /* -------------------------------------------------------------------------- */
   
   static int
   lkpi_sta_state_do_nada(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
   {
   
           return (0);
   }
   
   /* lkpi_iv_newstate() handles the stop scan case generally. */
   #define lkpi_sta_scan_to_init(_v, _n, _a)       lkpi_sta_state_do_nada(_v, _n, _a)
   
   static int
   lkpi_sta_scan_to_auth(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
   {
           struct linuxkpi_ieee80211_channel *chan;
           struct ieee80211_chanctx_conf *conf;
           struct lkpi_hw *lhw;
           struct ieee80211_hw *hw;
           struct lkpi_vif *lvif;
           struct ieee80211_vif *vif;
           struct ieee80211_node *ni;
           struct lkpi_sta *lsta;
           enum ieee80211_bss_changed bss_changed;
           struct ieee80211_prep_tx_info prep_tx_info;
           uint32_t changed;
           int error;
   
           chan = lkpi_get_lkpi80211_chan(vap->iv_ic, vap->iv_bss);
           if (chan == NULL) {
                   ic_printf(vap->iv_ic, "%s: failed to get channel\n", __func__);
                   return (ESRCH);
           }
   
           lhw = vap->iv_ic->ic_softc;
           hw = LHW_TO_HW(lhw);
           lvif = VAP_TO_LVIF(vap);
           vif = LVIF_TO_VIF(lvif);
   
           ni = ieee80211_ref_node(vap->iv_bss);
   
           IEEE80211_UNLOCK(vap->iv_ic);
   
           /* Add chanctx (or if exists, change it). */
           if (vif->chanctx_conf != NULL) {
                   conf = vif->chanctx_conf;
                   IMPROVE("diff changes for changed, working on live copy, rcu");
           } else {
                   /* Keep separate alloc as in Linux this is rcu managed? */
                   conf = malloc(sizeof(*conf) + hw->chanctx_data_size,
                       M_LKPI80211, M_WAITOK | M_ZERO);
           }
   
           conf->rx_chains_dynamic = 1;
           conf->rx_chains_static = 1;
           conf->radar_enabled =
               (chan->flags & IEEE80211_CHAN_RADAR) ? true : false;
           conf->def.chan = chan;
           conf->def.width = NL80211_CHAN_WIDTH_20_NOHT;
           conf->def.center_freq1 = chan->center_freq;
           conf->def.center_freq2 = 0;
           /* Responder ... */
           conf->min_def.chan = chan;
           conf->min_def.width = NL80211_CHAN_WIDTH_20_NOHT;
           conf->min_def.center_freq1 = chan->center_freq;
           conf->min_def.center_freq2 = 0;
           IMPROVE("currently 20_NOHT only");
   
           error = 0;
           if (vif->chanctx_conf != NULL) {
                   changed = IEEE80211_CHANCTX_CHANGE_MIN_WIDTH;
                   changed |= IEEE80211_CHANCTX_CHANGE_RADAR;
                   changed |= IEEE80211_CHANCTX_CHANGE_RX_CHAINS;
                   changed |= IEEE80211_CHANCTX_CHANGE_WIDTH;
                   lkpi_80211_mo_change_chanctx(hw, conf, changed);
           } else {
                   error = lkpi_80211_mo_add_chanctx(hw, conf);
                   if (error == 0 || error == EOPNOTSUPP) {
                           vif->bss_conf.chandef.chan = conf->def.chan;
                           vif->bss_conf.chandef.width = conf->def.width;
                           vif->bss_conf.chandef.center_freq1 =
                               conf->def.center_freq1;
                           vif->bss_conf.chandef.center_freq2 =
                               conf->def.center_freq2;
                   } else {
                           goto out;
                   }
                   /* Assign vif chanctx. */
                   if (error == 0)
                           error = lkpi_80211_mo_assign_vif_chanctx(hw, vif, conf);
                   if (error == EOPNOTSUPP)
                           error = 0;
                   if (error != 0) {
                           lkpi_80211_mo_remove_chanctx(hw, conf);
                           free(conf, M_LKPI80211);
                           goto out;
                   }
           }
           IMPROVE("update radiotap chan fields too");
   
           /* Set bss info (bss_info_changed). */
           bss_changed = 0;
           vif->bss_conf.bssid = ni->ni_bssid;
           bss_changed |= BSS_CHANGED_BSSID;
           vif->bss_conf.txpower = ni->ni_txpower;
           bss_changed |= BSS_CHANGED_TXPOWER;
           vif->bss_conf.idle = false;
           bss_changed |= BSS_CHANGED_IDLE;
   
           /* Should almost assert it is this. */
           vif->bss_conf.assoc = false;
           vif->bss_conf.aid = 0;
   
           bss_changed |= lkpi_update_dtim_tsf(vif, ni, vap, __func__, __LINE__);
   
          /* RATES */
          IMPROVE("bss info: not all needs to come now and rates are missing");
          lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, bss_changed);
  
          /*
           * This is a bandaid for now.  If we went through (*iv_update_bss)()
           * and then removed the lsta we end up here without a lsta and have
           * to manually allocate and link it in as lkpi_ic_node_alloc()/init()
           * would normally do.
           * XXX-BZ I do not like this but currently we have no good way of
           * intercepting the bss swap and state changes and packets going out
           * workflow so live with this.  It is a compat layer after all.
           */
          if (ni->ni_drv_data == NULL) {
                  lsta = lkpi_lsta_alloc(vap, ni->ni_macaddr, hw, ni);
                  if (lsta == NULL) {
                          error = ENOMEM;
                          goto out;
                  }
                  lsta->ni = ieee80211_ref_node(ni);
          } else {
                  lsta = ni->ni_drv_data;
          }
  
          /* Insert the [l]sta into the list of known stations. */
          LKPI_80211_LVIF_LOCK(lvif);
          TAILQ_INSERT_TAIL(&lvif->lsta_head, lsta, lsta_entry);
          LKPI_80211_LVIF_UNLOCK(lvif);
  
          /* Add (or adjust) sta and change state (from NOTEXIST) to NONE. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_NOTEXIST, ("%s: lsta %p state not "
              "NOTEXIST: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_NONE);
          if (error != 0) {
                  IMPROVE("do we need to undo the chan ctx?");
                  goto out;
          }
  #if 0
          lsta->added_to_drv = true;      /* mo manages. */
  #endif
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /*
           * Wakeup all queues now that sta is there so we have as much time to
           * possibly prepare the queue in the driver to be ready for the 1st
           * packet;  lkpi_80211_txq_tx_one() still has a workaround as there
           * is no guarantee or way to check.
           * XXX-BZ and by now we know that this does not work on all drivers
           * for all queues.
           */
          lkpi_wake_tx_queues(hw, LSTA_TO_STA(lsta), false, false);
  
          /* Start mgd_prepare_tx. */
          memset(&prep_tx_info, 0, sizeof(prep_tx_info));
          prep_tx_info.duration = PREP_TX_INFO_DURATION;
          lkpi_80211_mo_mgd_prepare_tx(hw, vif, &prep_tx_info);
          lsta->in_mgd = true;
  
          /*
           * What is going to happen next:
           * - <twiddle> .. we should end up in "auth_to_assoc"
           * - event_callback
           * - update sta_state (NONE to AUTH)
           * - mgd_complete_tx
           * (ideally we'd do that on a callback for something else ...)
           */
  
  out:
          IEEE80211_LOCK(vap->iv_ic);
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  static int
  lkpi_sta_auth_to_scan(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
          struct ieee80211_prep_tx_info prep_tx_info;
          int error;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          /* Keep ni around. */
          ni = ieee80211_ref_node(vap->iv_bss);
          lsta = ni->ni_drv_data;
          sta = LSTA_TO_STA(lsta);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          /* flush, drop. */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), true);
  
          /* Wake tx queues to get packet(s) out. */
          lkpi_wake_tx_queues(hw, sta, true, true);
  
          /* flush, no drop */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), false);
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = false;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
          /* sync_rx_queues */
          lkpi_80211_mo_sync_rx_queues(hw);
  
          /* sta_pre_rcu_remove */
          lkpi_80211_mo_sta_pre_rcu_remove(hw, vif, sta);
  
          /* Take the station down. */
  
          /* Adjust sta and change state (from NONE) to NOTEXIST. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_NONE, ("%s: lsta %p state not "
              "NONE: %#x, nstate %d arg %d\n", __func__, lsta, lsta->state, nstate, arg));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_NOTEXIST);
          if (error != 0) {
                  IMPROVE("do we need to undo the chan ctx?");
                  goto out;
          }
  #if 0
          lsta->added_to_drv = false;     /* mo manages. */
  #endif
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          lkpi_lsta_remove(lsta, lvif);
  
          /* conf_tx */
  
          /* Take the chan ctx down. */
          if (vif->chanctx_conf != NULL) {
                  struct ieee80211_chanctx_conf *conf;
  
                  conf = vif->chanctx_conf;
                  /* Remove vif context. */
                  lkpi_80211_mo_unassign_vif_chanctx(hw, vif, &vif->chanctx_conf);
                  /* NB: vif->chanctx_conf is NULL now. */
  
                  /* Remove chan ctx. */
                  lkpi_80211_mo_remove_chanctx(hw, conf);
                  free(conf, M_LKPI80211);
          }
  
  out:
          IEEE80211_LOCK(vap->iv_ic);
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  static int
  lkpi_sta_auth_to_init(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          int error;
  
          error = lkpi_sta_auth_to_scan(vap, nstate, arg);
          if (error == 0)
                  error = lkpi_sta_scan_to_init(vap, nstate, arg);
          return (error);
  }
  
  static int
  lkpi_sta_auth_to_assoc(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_prep_tx_info prep_tx_info;
          int error;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          IEEE80211_UNLOCK(vap->iv_ic);
          ni = NULL;
  
          /* Finish auth. */
          IMPROVE("event callback");
  
          /* Update sta_state (NONE to AUTH). */
          ni = ieee80211_ref_node(vap->iv_bss);
          lsta = ni->ni_drv_data;
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_NONE, ("%s: lsta %p state not "
              "NONE: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_AUTH);
          if (error != 0)
                  goto out;
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = true;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
          /* Now start assoc. */
  
          /* Start mgd_prepare_tx. */
          if (!lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.duration = PREP_TX_INFO_DURATION;
                  lkpi_80211_mo_mgd_prepare_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = true;
          }
  
          /* Wake tx queue to get packet out. */
          lkpi_wake_tx_queues(hw, LSTA_TO_STA(lsta), true, true);
  
          /*
           * <twiddle> .. we end up in "assoc_to_run"
           * - update sta_state (AUTH to ASSOC)
           * - conf_tx [all]
           * - bss_info_changed (assoc, aid, ssid, ..)
           * - change_chanctx (if needed)
           * - event_callback
           * - mgd_complete_tx
           */
  
  out:
          IEEE80211_LOCK(vap->iv_ic);
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  /* auth_to_auth, assoc_to_assoc. */
  static int
  lkpi_sta_a_to_a(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_prep_tx_info prep_tx_info;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          ni = ieee80211_ref_node(vap->iv_bss);
  
          IEEE80211_UNLOCK(vap->iv_ic);
          lsta = ni->ni_drv_data;
  
          IMPROVE("event callback?");
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = false;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
          /* Now start assoc. */
  
          /* Start mgd_prepare_tx. */
          if (!lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.duration = PREP_TX_INFO_DURATION;
                  lkpi_80211_mo_mgd_prepare_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = true;
          }
  
          IEEE80211_LOCK(vap->iv_ic);
          if (ni != NULL)
                  ieee80211_free_node(ni);
  
          return (0);
  }
  
  static int
  _lkpi_sta_assoc_to_down(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
          struct ieee80211_prep_tx_info prep_tx_info;
          enum ieee80211_bss_changed bss_changed;
          int error;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          /* Keep ni around. */
          ni = ieee80211_ref_node(vap->iv_bss);
          lsta = ni->ni_drv_data;
          sta = LSTA_TO_STA(lsta);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          /* flush, drop. */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), true);
  
          IMPROVE("What are the proper conditions for DEAUTH_NEED_MGD_TX_PREP?");
          if (ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP) &&
              !lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.duration = PREP_TX_INFO_DURATION;
                  lkpi_80211_mo_mgd_prepare_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = true;
          }
  
          IEEE80211_LOCK(vap->iv_ic);
  
          /* Call iv_newstate first so we get potential DISASSOC packet out. */
          error = lvif->iv_newstate(vap, nstate, arg);
          if (error != 0)
                  goto outni;
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Wake tx queues to get packet(s) out. */
          lkpi_wake_tx_queues(hw, sta, true, true);
  
          /* flush, no drop */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), false);
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = false;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
          /* sync_rx_queues */
          lkpi_80211_mo_sync_rx_queues(hw);
  
          /* sta_pre_rcu_remove */
          lkpi_80211_mo_sta_pre_rcu_remove(hw, vif, sta);
  
          /* Take the station down. */
  
          /* Update sta and change state (from AUTH) to NONE. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_AUTH, ("%s: lsta %p state not "
              "AUTH: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_NONE);
          if (error != 0)
                  goto out;
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Adjust sta and change state (from NONE) to NOTEXIST. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_NONE, ("%s: lsta %p state not "
              "NONE: %#x, nstate %d arg %d\n", __func__, lsta, lsta->state, nstate, arg));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_NOTEXIST);
          if (error != 0) {
                  IMPROVE("do we need to undo the chan ctx?");
                  goto out;
          }
  #if 0
          lsta->added_to_drv = false;     /* mo manages. */
  #endif
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Update bss info (bss_info_changed) (assoc, aid, ..). */
          /* We need to do this now, can only do after sta is IEEE80211_STA_NOTEXIST. */
          lkpi_disassoc(sta, vif, lhw);
  
          IMPROVE("Any bss_info changes to announce?");
          bss_changed = 0;
          vif->bss_conf.qos = 0;
          bss_changed |= BSS_CHANGED_QOS;
          vif->bss_conf.ssid_len = 0;
          memset(vif->bss_conf.ssid, '\0', sizeof(vif->bss_conf.ssid));
          bss_changed |= BSS_CHANGED_BSSID;
          lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, bss_changed);
  
          lkpi_lsta_remove(lsta, lvif);
  
          /* conf_tx */
  
          /* Take the chan ctx down. */
          if (vif->chanctx_conf != NULL) {
                  struct ieee80211_chanctx_conf *conf;
  
                  conf = vif->chanctx_conf;
                  /* Remove vif context. */
                  lkpi_80211_mo_unassign_vif_chanctx(hw, vif, &vif->chanctx_conf);
                  /* NB: vif->chanctx_conf is NULL now. */
  
                  /* Remove chan ctx. */
                  lkpi_80211_mo_remove_chanctx(hw, conf);
                  free(conf, M_LKPI80211);
          }
  
          error = EALREADY;
  out:
          IEEE80211_LOCK(vap->iv_ic);
  outni:
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  static int
  lkpi_sta_assoc_to_auth(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          int error;
  
          error = _lkpi_sta_assoc_to_down(vap, nstate, arg);
          if (error != 0 && error != EALREADY)
                  return (error);
  
          /* At this point iv_bss is long a new node! */
  
          error |= lkpi_sta_scan_to_auth(vap, nstate, 0);
          return (error);
  }
  
  static int
  lkpi_sta_assoc_to_scan(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          int error;
  
          error = _lkpi_sta_assoc_to_down(vap, nstate, arg);
          return (error);
  }
  
  static int
  lkpi_sta_assoc_to_init(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          int error;
  
          error = _lkpi_sta_assoc_to_down(vap, nstate, arg);
          return (error);
  }
  
  static int
  lkpi_sta_assoc_to_run(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
          struct ieee80211_prep_tx_info prep_tx_info;
          enum ieee80211_bss_changed bss_changed;
          int error;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          IEEE80211_UNLOCK(vap->iv_ic);
          ni = NULL;
  
          IMPROVE("ponder some of this moved to ic_newassoc, scan_assoc_success, "
              "and to lesser extend ieee80211_notify_node_join");
  
          /* Finish assoc. */
          /* Update sta_state (AUTH to ASSOC) and set aid. */
          ni = ieee80211_ref_node(vap->iv_bss);
          lsta = ni->ni_drv_data;
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_AUTH, ("%s: lsta %p state not "
              "AUTH: %#x\n", __func__, lsta, lsta->state));
          sta = LSTA_TO_STA(lsta);
          sta->aid = IEEE80211_NODE_AID(ni);
  #ifdef LKPI_80211_WME
          if (vap->iv_flags & IEEE80211_F_WME)
                  sta->wme = true;
  #endif
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_ASSOC);
          if (error != 0)
                  goto out;
  
          IMPROVE("wme / conf_tx [all]");
  
          /* Update bss info (bss_info_changed) (assoc, aid, ..). */
          bss_changed = 0;
  #ifdef LKPI_80211_WME
          bss_changed |= lkpi_wme_update(lhw, vap, true);
  #endif
          if (!vif->bss_conf.assoc || vif->bss_conf.aid != IEEE80211_NODE_AID(ni)) {
                  vif->bss_conf.assoc = true;
                  vif->bss_conf.aid = IEEE80211_NODE_AID(ni);
                  bss_changed |= BSS_CHANGED_ASSOC;
          }
          /* We set SSID but this is not BSSID! */
          vif->bss_conf.ssid_len = ni->ni_esslen;
          memcpy(vif->bss_conf.ssid, ni->ni_essid, ni->ni_esslen);
          if ((vap->iv_flags & IEEE80211_F_SHPREAMBLE) !=
              vif->bss_conf.use_short_preamble) {
                  vif->bss_conf.use_short_preamble ^= 1;
                  /* bss_changed |= BSS_CHANGED_??? */
          }
          if ((vap->iv_flags & IEEE80211_F_SHSLOT) !=
              vif->bss_conf.use_short_slot) {
                  vif->bss_conf.use_short_slot ^= 1;
                  /* bss_changed |= BSS_CHANGED_??? */
          }
          if ((ni->ni_flags & IEEE80211_NODE_QOS) !=
              vif->bss_conf.qos) {
                  vif->bss_conf.qos ^= 1;
                  bss_changed |= BSS_CHANGED_QOS;
          }
  
          bss_changed |= lkpi_update_dtim_tsf(vif, ni, vap, __func__, __LINE__);
  
          lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, bss_changed);
  
          /* - change_chanctx (if needed)
           * - event_callback
           */
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = true;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
          lkpi_hw_conf_idle(hw, false);
  
          /*
           * And then:
           * - (more packets)?
           * - set_key
           * - set_default_unicast_key
           * - set_key (?)
           * - ipv6_addr_change (?)
           */
          /* Prepare_multicast && configure_filter. */
          lhw->update_mc = true;
          lkpi_update_mcast_filter(vap->iv_ic, true);
  
          if (!ieee80211_node_is_authorized(ni)) {
                  IMPROVE("net80211 does not consider node authorized");
          }
  
          /* Update sta_state (ASSOC to AUTHORIZED). */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_ASSOC, ("%s: lsta %p state not "
              "ASSOC: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_AUTHORIZED);
          if (error != 0) {
                  IMPROVE("undo some changes?");
                  goto out;
          }
  
          /* - drv_config (?)
           * - bss_info_changed
           * - set_rekey_data (?)
           *
           * And now we should be passing packets.
           */
          IMPROVE("Need that bssid setting, and the keys");
  
          bss_changed = 0;
          bss_changed |= lkpi_update_dtim_tsf(vif, ni, vap, __func__, __LINE__);
          lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, bss_changed);
  
  out:
          IEEE80211_LOCK(vap->iv_ic);
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  static int
  lkpi_sta_auth_to_run(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          int error;
  
          error = lkpi_sta_auth_to_assoc(vap, nstate, arg);
          if (error == 0)
                  error = lkpi_sta_assoc_to_run(vap, nstate, arg);
          return (error);
  }
  
  static int
  lkpi_sta_run_to_assoc(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
          struct ieee80211_prep_tx_info prep_tx_info;
  #if 0
          enum ieee80211_bss_changed bss_changed;
  #endif
          int error;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          /* Keep ni around. */
          ni = ieee80211_ref_node(vap->iv_bss);
          lsta = ni->ni_drv_data;
          sta = LSTA_TO_STA(lsta);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          /* flush, drop. */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), true);
  
          IMPROVE("What are the proper conditions for DEAUTH_NEED_MGD_TX_PREP?");
          if (ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP) &&
              !lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.duration = PREP_TX_INFO_DURATION;
                  lkpi_80211_mo_mgd_prepare_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = true;
          }
  
          IEEE80211_LOCK(vap->iv_ic);
  
          /* Call iv_newstate first so we get potential DISASSOC packet out. */
          error = lvif->iv_newstate(vap, nstate, arg);
          if (error != 0)
                  goto outni;
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Wake tx queues to get packet(s) out. */
          lkpi_wake_tx_queues(hw, sta, true, true);
  
          /* flush, no drop */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), false);
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = false;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
  #if 0
          /* sync_rx_queues */
          lkpi_80211_mo_sync_rx_queues(hw);
  
          /* sta_pre_rcu_remove */
          lkpi_80211_mo_sta_pre_rcu_remove(hw, vif, sta);
  #endif
  
          /* Take the station down. */
  
          /* Adjust sta and change state (from AUTHORIZED) to ASSOC. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_AUTHORIZED, ("%s: lsta %p state not "
              "AUTHORIZED: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_ASSOC);
          if (error != 0)
                  goto out;
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Update sta_state (ASSOC to AUTH). */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_ASSOC, ("%s: lsta %p state not "
              "ASSOC: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_AUTH);
          if (error != 0)
                  goto out;
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
  #if 0
          /* Update bss info (bss_info_changed) (assoc, aid, ..). */
          lkpi_disassoc(sta, vif, lhw);
  #endif
  
          error = EALREADY;
  out:
          IEEE80211_LOCK(vap->iv_ic);
  outni:
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  static int
  lkpi_sta_run_to_init(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_node *ni;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
          struct ieee80211_prep_tx_info prep_tx_info;
          enum ieee80211_bss_changed bss_changed;
          int error;
  
          lhw = vap->iv_ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          /* Keep ni around. */
          ni = ieee80211_ref_node(vap->iv_bss);
          lsta = ni->ni_drv_data;
          sta = LSTA_TO_STA(lsta);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          /* flush, drop. */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), true);
  
          IMPROVE("What are the proper conditions for DEAUTH_NEED_MGD_TX_PREP?");
          if (ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP) &&
              !lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.duration = PREP_TX_INFO_DURATION;
                  lkpi_80211_mo_mgd_prepare_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = true;
          }
  
          IEEE80211_LOCK(vap->iv_ic);
  
          /* Call iv_newstate first so we get potential DISASSOC packet out. */
          error = lvif->iv_newstate(vap, nstate, arg);
          if (error != 0)
                  goto outni;
  
          IEEE80211_UNLOCK(vap->iv_ic);
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Wake tx queues to get packet(s) out. */
          lkpi_wake_tx_queues(hw, sta, true, true);
  
          /* flush, no drop */
          lkpi_80211_mo_flush(hw, vif,  nitems(sta->txq), false);
  
          /* End mgd_complete_tx. */
          if (lsta->in_mgd) {
                  memset(&prep_tx_info, 0, sizeof(prep_tx_info));
                  prep_tx_info.success = false;
                  lkpi_80211_mo_mgd_complete_tx(hw, vif, &prep_tx_info);
                  lsta->in_mgd = false;
          }
  
          /* sync_rx_queues */
          lkpi_80211_mo_sync_rx_queues(hw);
  
          /* sta_pre_rcu_remove */
          lkpi_80211_mo_sta_pre_rcu_remove(hw, vif, sta);
  
          /* Take the station down. */
  
          /* Adjust sta and change state (from AUTHORIZED) to ASSOC. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_AUTHORIZED, ("%s: lsta %p state not "
              "AUTHORIZED: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_ASSOC);
          if (error != 0)
                  goto out;
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Update sta_state (ASSOC to AUTH). */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_ASSOC, ("%s: lsta %p state not "
              "ASSOC: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_AUTH);
          if (error != 0)
                  goto out;
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Update sta and change state (from AUTH) to NONE. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_AUTH, ("%s: lsta %p state not "
              "AUTH: %#x\n", __func__, lsta, lsta->state));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_NONE);
          if (error != 0)
                  goto out;
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Adjust sta and change state (from NONE) to NOTEXIST. */
          KASSERT(lsta != NULL, ("%s: ni %p lsta is NULL\n", __func__, ni));
          KASSERT(lsta->state == IEEE80211_STA_NONE, ("%s: lsta %p state not "
              "NONE: %#x, nstate %d arg %d\n", __func__, lsta, lsta->state, nstate, arg));
          error = lkpi_80211_mo_sta_state(hw, vif, lsta, IEEE80211_STA_NOTEXIST);
          if (error != 0) {
                  IMPROVE("do we need to undo the chan ctx?");
                  goto out;
          }
  #if 0
          lsta->added_to_drv = false;     /* mo manages. */
  #endif
  
          lkpi_lsta_dump(lsta, ni, __func__, __LINE__);
  
          /* Update bss info (bss_info_changed) (assoc, aid, ..). */
          /*
           * One would expect this to happen when going off AUTHORIZED.
           * See comment there; removes the sta from fw.
           */
          lkpi_disassoc(sta, vif, lhw);
  
          IMPROVE("Any bss_info changes to announce?");
          bss_changed = 0;
          vif->bss_conf.qos = 0;
          bss_changed |= BSS_CHANGED_QOS;
          vif->bss_conf.ssid_len = 0;
          memset(vif->bss_conf.ssid, '\0', sizeof(vif->bss_conf.ssid));
          bss_changed |= BSS_CHANGED_BSSID;
          lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, bss_changed);
  
          lkpi_lsta_remove(lsta, lvif);
  
          /* conf_tx */
  
          /* Take the chan ctx down. */
          if (vif->chanctx_conf != NULL) {
                  struct ieee80211_chanctx_conf *conf;
  
                  conf = vif->chanctx_conf;
                  /* Remove vif context. */
                  lkpi_80211_mo_unassign_vif_chanctx(hw, vif, &vif->chanctx_conf);
                  /* NB: vif->chanctx_conf is NULL now. */
  
                  /* Remove chan ctx. */
                  lkpi_80211_mo_remove_chanctx(hw, conf);
                  free(conf, M_LKPI80211);
          }
  
          error = EALREADY;
  out:
          IEEE80211_LOCK(vap->iv_ic);
  outni:
          if (ni != NULL)
                  ieee80211_free_node(ni);
          return (error);
  }
  
  static int
  lkpi_sta_run_to_scan(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
  
          return (lkpi_sta_run_to_init(vap, nstate, arg));
  }
  
  static int
  lkpi_sta_run_to_auth(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          int error;
  
          error = lkpi_sta_run_to_init(vap, nstate, arg);
          if (error != 0 && error != EALREADY)
                  return (error);
  
          /* At this point iv_bss is long a new node! */
  
          error |= lkpi_sta_scan_to_auth(vap, nstate, 0);
          return (error);
  }
  
  /* -------------------------------------------------------------------------- */
  
  /*
   * The matches the documented state changes in net80211::sta_newstate().
   * XXX (1) without CSA and SLEEP yet, * XXX (2) not all unhandled cases
   * there are "invalid" (so there is a room for failure here).
   */
  struct fsm_state {
          /* INIT, SCAN, AUTH, ASSOC, CAC, RUN, CSA, SLEEP */
          enum ieee80211_state ostate;
          enum ieee80211_state nstate;
          int (*handler)(struct ieee80211vap *, enum ieee80211_state, int);
  } sta_state_fsm[] = {
          { IEEE80211_S_INIT,     IEEE80211_S_INIT, lkpi_sta_state_do_nada },
          { IEEE80211_S_SCAN,     IEEE80211_S_INIT, lkpi_sta_state_do_nada },     /* scan_to_init */
          { IEEE80211_S_AUTH,     IEEE80211_S_INIT, lkpi_sta_auth_to_init },      /* not explicitly in sta_newstate() */
          { IEEE80211_S_ASSOC,    IEEE80211_S_INIT, lkpi_sta_assoc_to_init },     /* Send DEAUTH. */
          { IEEE80211_S_RUN,      IEEE80211_S_INIT, lkpi_sta_run_to_init },       /* Send DISASSOC. */
  
          { IEEE80211_S_INIT,     IEEE80211_S_SCAN, lkpi_sta_state_do_nada },
          { IEEE80211_S_SCAN,     IEEE80211_S_SCAN, lkpi_sta_state_do_nada },
          { IEEE80211_S_AUTH,     IEEE80211_S_SCAN, lkpi_sta_auth_to_scan },
          { IEEE80211_S_ASSOC,    IEEE80211_S_SCAN, lkpi_sta_assoc_to_scan },
          { IEEE80211_S_RUN,      IEEE80211_S_SCAN, lkpi_sta_run_to_scan },       /* Beacon miss. */
  
          { IEEE80211_S_INIT,     IEEE80211_S_AUTH, lkpi_sta_scan_to_auth },      /* Send AUTH. */
          { IEEE80211_S_SCAN,     IEEE80211_S_AUTH, lkpi_sta_scan_to_auth },      /* Send AUTH. */
          { IEEE80211_S_AUTH,     IEEE80211_S_AUTH, lkpi_sta_a_to_a },            /* Send ?AUTH. */
          { IEEE80211_S_ASSOC,    IEEE80211_S_AUTH, lkpi_sta_assoc_to_auth },     /* Send ?AUTH. */
          { IEEE80211_S_RUN,      IEEE80211_S_AUTH, lkpi_sta_run_to_auth },       /* Send ?AUTH. */
  
          { IEEE80211_S_AUTH,     IEEE80211_S_ASSOC, lkpi_sta_auth_to_assoc },    /* Send ASSOCREQ. */
          { IEEE80211_S_ASSOC,    IEEE80211_S_ASSOC, lkpi_sta_a_to_a },           /* Send ASSOCREQ. */
          { IEEE80211_S_RUN,      IEEE80211_S_ASSOC, lkpi_sta_run_to_assoc },     /* Send ASSOCREQ/REASSOCREQ. */
  
          { IEEE80211_S_AUTH,     IEEE80211_S_RUN, lkpi_sta_auth_to_run },
          { IEEE80211_S_ASSOC,    IEEE80211_S_RUN, lkpi_sta_assoc_to_run },
          { IEEE80211_S_RUN,      IEEE80211_S_RUN, lkpi_sta_state_do_nada },
  
          /* Dummy at the end without handler. */
          { IEEE80211_S_INIT,     IEEE80211_S_INIT, NULL },
  };
  
  static int
  lkpi_iv_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct fsm_state *s;
          enum ieee80211_state ostate;
          int error;
  
          ic = vap->iv_ic;
          IEEE80211_LOCK_ASSERT(ic);
          ostate = vap->iv_state;
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE)
                  ic_printf(vap->iv_ic, "%s:%d: vap %p nstate %#x arg %#x\n",
                      __func__, __LINE__, vap, nstate, arg);
  #endif
  
          if (vap->iv_opmode == IEEE80211_M_STA) {
  
                  lhw = ic->ic_softc;
                  lvif = VAP_TO_LVIF(vap);
                  vif = LVIF_TO_VIF(lvif);
  
                  /* No need to replicate this in most state handlers. */
                  if (ostate == IEEE80211_S_SCAN && nstate != IEEE80211_S_SCAN)
                          lkpi_stop_hw_scan(lhw, vif);
  
                  s = sta_state_fsm;
  
          } else {
                  ic_printf(vap->iv_ic, "%s: only station mode currently supported: "
                      "cap %p iv_opmode %d\n", __func__, vap, vap->iv_opmode);
                  return (ENOSYS);
          }
  
          error = 0;
          for (; s->handler != NULL; s++) {
                  if (ostate == s->ostate && nstate == s->nstate) {
  #ifdef LINUXKPI_DEBUG_80211
                          if (linuxkpi_debug_80211 & D80211_TRACE)
                                  ic_printf(vap->iv_ic, "%s: new state %d (%s) ->"
                                      " %d (%s): arg %d.\n", __func__,
                                      ostate, ieee80211_state_name[ostate],
                                      nstate, ieee80211_state_name[nstate], arg);
  #endif
                          error = s->handler(vap, nstate, arg);
                          break;
                  }
          }
          IEEE80211_LOCK_ASSERT(vap->iv_ic);
  
          if (s->handler == NULL) {
                  IMPROVE("turn this into a KASSERT\n");
                  ic_printf(vap->iv_ic, "%s: unsupported state transition "
                      "%d (%s) -> %d (%s)\n", __func__,
                      ostate, ieee80211_state_name[ostate],
                      nstate, ieee80211_state_name[nstate]);
                  return (ENOSYS);
          }
  
          if (error == EALREADY) {
  #ifdef LINUXKPI_DEBUG_80211
                  if (linuxkpi_debug_80211 & D80211_TRACE)
                          ic_printf(vap->iv_ic, "%s: state transition %d (%s) -> "
                              "%d (%s): iv_newstate already handled: %d.\n",
                              __func__, ostate, ieee80211_state_name[ostate],
                              nstate, ieee80211_state_name[nstate], error);
  #endif
                  return (0);
          }
  
          if (error != 0) {
                  /* XXX-BZ currently expected so ignore. */
                  ic_printf(vap->iv_ic, "%s: error %d during state transition "
                      "%d (%s) -> %d (%s)\n", __func__, error,
                      ostate, ieee80211_state_name[ostate],
                      nstate, ieee80211_state_name[nstate]);
                  /* return (error); */
          }
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE)
                  ic_printf(vap->iv_ic, "%s:%d: vap %p nstate %#x arg %#x "
                      "calling net80211 parent\n",
                      __func__, __LINE__, vap, nstate, arg);
  #endif
  
          return (lvif->iv_newstate(vap, nstate, arg));
  }
  
  /* -------------------------------------------------------------------------- */
  
  /*
   * We overload (*iv_update_bss) as otherwise we have cases in, e.g.,
   * net80211::ieee80211_sta_join1() where vap->iv_bss gets replaced by a
   * new node without us knowing and thus our ni/lsta are out of sync.
   */
  static struct ieee80211_node *
  lkpi_iv_update_bss(struct ieee80211vap *vap, struct ieee80211_node *ni)
  {
          struct lkpi_vif *lvif;
          struct ieee80211_node *obss;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
  
          obss = vap->iv_bss;
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE)
                  ic_printf(vap->iv_ic, "%s: obss %p ni_drv_data %p "
                      "ni %p ni_drv_data %p\n", __func__,
                      obss, (obss != NULL) ? obss->ni_drv_data : NULL,
                      ni, (ni != NULL) ? ni->ni_drv_data : NULL);
  #endif
  
          /* Nothing to copy from.  Just return. */
          if (obss == NULL || obss->ni_drv_data == NULL)
                  goto out;
  
          /* Nothing to copy to.  Just return. */
          IMPROVE("clearing the obss might still be needed?");
          if (ni == NULL)
                  goto out;
  
          /* Nothing changed? panic? */
          if (obss == ni)
                  goto out;
  
          lsta = obss->ni_drv_data;
          obss->ni_drv_data = ni->ni_drv_data;
          ni->ni_drv_data = lsta;
          if (lsta != NULL) {
                  lsta->ni = ni;
                  sta = LSTA_TO_STA(lsta);
                  IEEE80211_ADDR_COPY(sta->addr, lsta->ni->ni_macaddr);
          }
          lsta = obss->ni_drv_data;
          if (lsta != NULL) {
                  lsta->ni = obss;
                  sta = LSTA_TO_STA(lsta);
                  IEEE80211_ADDR_COPY(sta->addr, lsta->ni->ni_macaddr);
          }
  
  out:
          lvif = VAP_TO_LVIF(vap);
          return (lvif->iv_update_bss(vap, ni));
  }
  
  #ifdef LKPI_80211_WME
  static int
  lkpi_wme_update(struct lkpi_hw *lhw, struct ieee80211vap *vap, bool planned)
  {
          struct ieee80211com *ic;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct chanAccParams chp;
          struct wmeParams wmeparr[WME_NUM_AC];
          struct ieee80211_tx_queue_params txqp;
          enum ieee80211_bss_changed changed;
          int error;
          uint16_t ac;
  
          IMPROVE();
          KASSERT(WME_NUM_AC == IEEE80211_NUM_ACS, ("%s: WME_NUM_AC %d != "
              "IEEE80211_NUM_ACS %d\n", __func__, WME_NUM_AC, IEEE80211_NUM_ACS));
  
          if (vap == NULL)
                  return (0);
  
          if ((vap->iv_flags & IEEE80211_F_WME) == 0)
                  return (0);
  
          if (lhw->ops->conf_tx == NULL)
                  return (0);
  
          if (!planned && (vap->iv_state != IEEE80211_S_RUN)) {
                  lhw->update_wme = true;
                  return (0);
          }
          lhw->update_wme = false;
  
          ic = lhw->ic;
          ieee80211_wme_ic_getparams(ic, &chp);
          IEEE80211_LOCK(ic);
          for (ac = 0; ac < WME_NUM_AC; ac++)
                  wmeparr[ac] = chp.cap_wmeParams[ac];
          IEEE80211_UNLOCK(ic);
  
          hw = LHW_TO_HW(lhw);
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
  
          /* Configure tx queues (conf_tx) & send BSS_CHANGED_QOS. */
          LKPI_80211_LHW_LOCK(lhw);
          for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
                  struct wmeParams *wmep;
  
                  wmep = &wmeparr[ac];
                  bzero(&txqp, sizeof(txqp));
                  txqp.cw_min = wmep->wmep_logcwmin;
                  txqp.cw_max = wmep->wmep_logcwmax;
                  txqp.txop = wmep->wmep_txopLimit;
                  txqp.aifs = wmep->wmep_aifsn;
                  error = lkpi_80211_mo_conf_tx(hw, vif, ac, &txqp);
                  if (error != 0)
                          printf("%s: conf_tx ac %u failed %d\n",
                              __func__, ac, error);
          }
          LKPI_80211_LHW_UNLOCK(lhw);
          changed = BSS_CHANGED_QOS;
          if (!planned)
                  lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, changed);
  
          return (changed);
  }
  #endif
  
  static int
  lkpi_ic_wme_update(struct ieee80211com *ic)
  {
  #ifdef LKPI_80211_WME
          struct ieee80211vap *vap;
          struct lkpi_hw *lhw;
  
          IMPROVE("Use the per-VAP callback in net80211.");
          vap = TAILQ_FIRST(&ic->ic_vaps);
          if (vap == NULL)
                  return (0);
  
          lhw = ic->ic_softc;
  
          lkpi_wme_update(lhw, vap, false);
  #endif
          return (0);     /* unused */
  }
  
  static struct ieee80211vap *
  lkpi_ic_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ],
      int unit, enum ieee80211_opmode opmode, int flags,
      const uint8_t bssid[IEEE80211_ADDR_LEN],
      const uint8_t mac[IEEE80211_ADDR_LEN])
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211vap *vap;
          struct ieee80211_vif *vif;
          enum ieee80211_bss_changed changed;
          size_t len;
          int error, i;
  
          if (!TAILQ_EMPTY(&ic->ic_vaps)) /* 1 so far. Add <n> once this works. */
                  return (NULL);
  
          lhw = ic->ic_softc;
          hw = LHW_TO_HW(lhw);
  
          len = sizeof(*lvif);
          len += hw->vif_data_size;       /* vif->drv_priv */
  
          lvif = malloc(len, M_80211_VAP, M_WAITOK | M_ZERO);
          mtx_init(&lvif->mtx, "lvif", NULL, MTX_DEF);
          TAILQ_INIT(&lvif->lsta_head);
          vap = LVIF_TO_VAP(lvif);
  
          vif = LVIF_TO_VIF(lvif);
          memcpy(vif->addr, mac, IEEE80211_ADDR_LEN);
          vif->p2p = false;
          vif->probe_req_reg = false;
          vif->type = lkpi_opmode_to_vif_type(opmode);
          lvif->wdev.iftype = vif->type;
          /* Need to fill in other fields as well. */
          IMPROVE();
  
          /* XXX-BZ hardcoded for now! */
  #if 1
          vif->chanctx_conf = NULL;
          vif->bss_conf.idle = true;
          vif->bss_conf.ps = false;
          vif->bss_conf.chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
          vif->bss_conf.use_short_preamble = false;       /* vap->iv_flags IEEE80211_F_SHPREAMBLE */
          vif->bss_conf.use_short_slot = false;           /* vap->iv_flags IEEE80211_F_SHSLOT */
          vif->bss_conf.qos = false;
          vif->bss_conf.use_cts_prot = false;             /* vap->iv_protmode */
          vif->bss_conf.ht_operation_mode = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
          vif->bss_conf.assoc = false;
          vif->bss_conf.aid = 0;
          /*
           * We need to initialize it to something as the bss_info_changed call
           * will try to copy from it in iwlwifi and NULL is a panic.
           * We will set the proper one in scan_to_auth() before being assoc.
           * NB: the logic there with using an array as bssid_override and checking
           * for non-NULL later is flawed but in their workflow does not seem to
           * matter.
           */
          vif->bss_conf.bssid = zerobssid;
  #endif
  #if 0
          vif->bss_conf.dtim_period = 0; /* IEEE80211_DTIM_DEFAULT ; must stay 0. */
          IEEE80211_ADDR_COPY(vif->bss_conf.bssid, bssid);
          vif->bss_conf.beacon_int = ic->ic_bintval;
          /* iwlwifi bug. */
          if (vif->bss_conf.beacon_int < 16)
                  vif->bss_conf.beacon_int = 16;
  #endif
  
          /* Setup queue defaults; driver may override in (*add_interface). */
          for (i = 0; i < IEEE80211_NUM_ACS; i++) {
                  if (ieee80211_hw_check(hw, QUEUE_CONTROL))
                          vif->hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
                  else if (hw->queues >= IEEE80211_NUM_ACS)
                          vif->hw_queue[i] = i;
                  else
                          vif->hw_queue[i] = 0;
          }
          vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
  
          IMPROVE();
  
          error = lkpi_80211_mo_start(hw);
          if (error != 0) {
                  printf("%s: failed to start hw: %d\n", __func__, error);
                  mtx_destroy(&lvif->mtx);
                  free(lvif, M_80211_VAP);
                  return (NULL);
          }
  
          error = lkpi_80211_mo_add_interface(hw, vif);
          if (error != 0) {
                  IMPROVE();      /* XXX-BZ mo_stop()? */
                  printf("%s: failed to add interface: %d\n", __func__, error);
                  mtx_destroy(&lvif->mtx);
                  free(lvif, M_80211_VAP);
                  return (NULL);
          }
  
          LKPI_80211_LHW_LVIF_LOCK(lhw);
          TAILQ_INSERT_TAIL(&lhw->lvif_head, lvif, lvif_entry);
          LKPI_80211_LHW_LVIF_UNLOCK(lhw);
  
          /* Set bss_info. */
          changed = 0;
          lkpi_80211_mo_bss_info_changed(hw, vif, &vif->bss_conf, changed);
  
          /* conf_tx setup; default WME? */
  
          /* Force MC init. */
          lkpi_update_mcast_filter(ic, true);
  
          IMPROVE();
  
          ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);
  
          /* Override with LinuxKPI method so we can drive mac80211/cfg80211. */
          lvif->iv_newstate = vap->iv_newstate;
          vap->iv_newstate = lkpi_iv_newstate;
          lvif->iv_update_bss = vap->iv_update_bss;
          vap->iv_update_bss = lkpi_iv_update_bss;
  
          /* Key management. */
          if (lhw->ops->set_key != NULL) {
  #ifdef LKPI_80211_HW_CRYPTO
                  vap->iv_key_set = lkpi_iv_key_set;
                  vap->iv_key_delete = lkpi_iv_key_delete;
  #endif
          }
  
          ieee80211_ratectl_init(vap);
  
          /* Complete setup. */
          ieee80211_vap_attach(vap, ieee80211_media_change,
              ieee80211_media_status, mac);
  
          if (hw->max_listen_interval == 0)
                  hw->max_listen_interval = 7 * (ic->ic_lintval / ic->ic_bintval);
          hw->conf.listen_interval = hw->max_listen_interval;
          ic->ic_set_channel(ic);
  
          /* XXX-BZ do we need to be able to update these? */
          hw->wiphy->frag_threshold =  vap->iv_fragthreshold;
          lkpi_80211_mo_set_frag_threshold(hw, vap->iv_fragthreshold);
          hw->wiphy->rts_threshold =  vap->iv_rtsthreshold;
          lkpi_80211_mo_set_rts_threshold(hw, vap->iv_rtsthreshold);
          /* any others? */
          IMPROVE();
  
          return (vap);
  }
  
  void
  linuxkpi_ieee80211_unregister_hw(struct ieee80211_hw *hw)
  {
  
          wiphy_unregister(hw->wiphy);
          linuxkpi_ieee80211_ifdetach(hw);
  
          IMPROVE();
  }
  
  void
  linuxkpi_ieee80211_restart_hw(struct ieee80211_hw *hw)
  {
  
          TODO();
  }
  
  static void
  lkpi_ic_vap_delete(struct ieee80211vap *vap)
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
  
          lvif = VAP_TO_LVIF(vap);
          vif = LVIF_TO_VIF(lvif);
          ic = vap->iv_ic;
          lhw = ic->ic_softc;
          hw = LHW_TO_HW(lhw);
  
          LKPI_80211_LHW_LVIF_LOCK(lhw);
          TAILQ_REMOVE(&lhw->lvif_head, lvif, lvif_entry);
          LKPI_80211_LHW_LVIF_UNLOCK(lhw);
          lkpi_80211_mo_remove_interface(hw, vif);
  
          ieee80211_ratectl_deinit(vap);
          ieee80211_vap_detach(vap);
          mtx_destroy(&lvif->mtx);
          free(lvif, M_80211_VAP);
  }
  
  static void
  lkpi_ic_update_mcast(struct ieee80211com *ic)
  {
  
          lkpi_update_mcast_filter(ic, false);
          TRACEOK();
  }
  
  static void
  lkpi_ic_update_promisc(struct ieee80211com *ic)
  {
  
          UNIMPLEMENTED;
  }
  
  static void
  lkpi_ic_update_chw(struct ieee80211com *ic)
  {
  
          UNIMPLEMENTED;
  }
  
  /* Start / stop device. */
  static void
  lkpi_ic_parent(struct ieee80211com *ic)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          int error;
          bool start_all;
  
          IMPROVE();
  
          lhw = ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          start_all = false;
  
          if (ic->ic_nrunning > 0) {
                  error = lkpi_80211_mo_start(hw);
                  if (error == 0)
                          start_all = true;
          } else {
                  lkpi_80211_mo_stop(hw);
          }
  
          if (start_all)
                  ieee80211_start_all(ic);
  }
  
  bool
  linuxkpi_ieee80211_is_ie_id_in_ie_buf(const u8 ie, const u8 *ie_ids,
      size_t ie_ids_len)
  {
          int i;
  
          for (i = 0; i < ie_ids_len; i++) {
                  if (ie == *ie_ids)
                          return (true);
          }
  
          return (false);
  }
  
  /* Return true if skipped; false if error. */
  bool
  linuxkpi_ieee80211_ie_advance(size_t *xp, const u8 *ies, size_t ies_len)
  {
          size_t x;
          uint8_t l;
  
          x = *xp;
  
          KASSERT(x < ies_len, ("%s: x %zu ies_len %zu ies %p\n",
              __func__, x, ies_len, ies));
          l = ies[x + 1];
          x += 2 + l;
  
          if (x > ies_len)
                  return (false);
  
          *xp = x;
          return (true);
  }
  
  static uint8_t *
  lkpi_scan_ies_add(uint8_t *p, struct ieee80211_scan_ies *scan_ies,
      uint32_t band_mask, struct ieee80211vap *vap, struct ieee80211_hw *hw)
  {
          struct ieee80211_supported_band *supband;
          struct linuxkpi_ieee80211_channel *channels;
          const struct ieee80211_channel *chan;
          const struct ieee80211_rateset *rs;
          uint8_t *pb;
          int band, i;
  
          for (band = 0; band < NUM_NL80211_BANDS; band++) {
                  if ((band_mask & (1 << band)) == 0)
                          continue;
  
                  supband = hw->wiphy->bands[band];
                  /*
                   * This should not happen;
                   * band_mask is a bitmask of valid bands to scan on.
                   */
                  if (supband == NULL || supband->n_channels == 0)
                          continue;
  
                  /* Find a first channel to get the mode and rates from. */
                  channels = supband->channels;
                  chan = NULL;
                  for (i = 0; i < supband->n_channels; i++) {
  
                          if (channels[i].flags & IEEE80211_CHAN_DISABLED)
                                  continue;
  
                          chan = ieee80211_find_channel(vap->iv_ic,
                              channels[i].center_freq, 0);
                          if (chan != NULL)
                                  break;
                  }
  
                  /* This really should not happen. */
                  if (chan == NULL)
                          continue;
  
                  pb = p;
                  rs = ieee80211_get_suprates(vap->iv_ic, chan);  /* calls chan2mode */
                  p = ieee80211_add_rates(p, rs);
                  p = ieee80211_add_xrates(p, rs);
  
                  scan_ies->ies[band] = pb;
                  scan_ies->len[band] = p - pb;
          }
  
          /* Add common_ies */
          pb = p;
          if ((vap->iv_flags & IEEE80211_F_WPA1) != 0 &&
              vap->iv_wpa_ie != NULL) {
                  memcpy(p, vap->iv_wpa_ie, 2 + vap->iv_wpa_ie[1]);
                  p += 2 + vap->iv_wpa_ie[1];
          }
          if (vap->iv_appie_probereq != NULL) {
                  memcpy(p, vap->iv_appie_probereq->ie_data,
                      vap->iv_appie_probereq->ie_len);
                  p += vap->iv_appie_probereq->ie_len;
          }
          scan_ies->common_ies = pb;
          scan_ies->common_ie_len = p - pb;
  
          return (p);
  }
  
  static void
  lkpi_ic_scan_start(struct ieee80211com *ic)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_scan_state *ss;
          struct ieee80211vap *vap;
          int error;
  
          lhw = ic->ic_softc;
          if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) != 0) {
                  /* A scan is still running. */
                  return;
          }
  
          ss = ic->ic_scan;
          vap = ss->ss_vap;
          if (vap->iv_state != IEEE80211_S_SCAN) {
                  IMPROVE("We need to be able to scan if not in S_SCAN");
                  return;
          }
  
          hw = LHW_TO_HW(lhw);
          if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0) {
                  /* If hw_scan is cleared clear FEXT_SCAN_OFFLOAD too. */
                  vap->iv_flags_ext &= ~IEEE80211_FEXT_SCAN_OFFLOAD;
  sw_scan:
                  lvif = VAP_TO_LVIF(vap);
                  vif = LVIF_TO_VIF(lvif);
  
                  if (vap->iv_state == IEEE80211_S_SCAN)
                          lkpi_hw_conf_idle(hw, false);
  
                  lkpi_80211_mo_sw_scan_start(hw, vif, vif->addr);
                  /* net80211::scan_start() handled PS for us. */
                  IMPROVE();
                  /* XXX Also means it is too late to flush queues?
                   * need to check iv_sta_ps or overload? */
                  /* XXX want to adjust ss end time/ maxdwell? */
  
          } else {
                  struct ieee80211_channel *c;
                  struct ieee80211_scan_request *hw_req;
                  struct linuxkpi_ieee80211_channel *lc, **cpp;
                  struct cfg80211_ssid *ssids;
                  struct cfg80211_scan_6ghz_params *s6gp;
                  size_t chan_len, nchan, ssids_len, s6ghzlen;
                  int band, i, ssid_count, common_ie_len;
                  uint32_t band_mask;
                  uint8_t *ie, *ieend;
  
                  if (!ieee80211_hw_check(hw, SINGLE_SCAN_ON_ALL_BANDS)) {
                          IMPROVE("individual band scans not yet supported");
                          /* In theory net80211 would have to drive this. */
                          return;
                  }
  
                  ssid_count = min(ss->ss_nssid, hw->wiphy->max_scan_ssids);
                  ssids_len = ssid_count * sizeof(*ssids);
                  s6ghzlen = 0 * (sizeof(*s6gp));                 /* XXX-BZ */
  
                  band_mask = 0;
                  nchan = 0;
                  for (i = ss->ss_next; i < ss->ss_last; i++) {
                          nchan++;
                          band = lkpi_net80211_chan_to_nl80211_band(
                              ss->ss_chans[ss->ss_next + i]);
                          band_mask |= (1 << band);
                  }
                  chan_len = nchan * (sizeof(lc) + sizeof(*lc));
  
                  common_ie_len = 0;
                  if ((vap->iv_flags & IEEE80211_F_WPA1) != 0 &&
                      vap->iv_wpa_ie != NULL)
                          common_ie_len += vap->iv_wpa_ie[1];
                  if (vap->iv_appie_probereq != NULL)
                          common_ie_len += vap->iv_appie_probereq->ie_len;
  
                  /* We would love to check this at an earlier stage... */
                  if (common_ie_len >  hw->wiphy->max_scan_ie_len) {
                          ic_printf(ic, "WARNING: %s: common_ie_len %d > "
                              "wiphy->max_scan_ie_len %d\n", __func__,
                              common_ie_len, hw->wiphy->max_scan_ie_len);
                  }
  
                  KASSERT(lhw->hw_req == NULL, ("%s: ic %p lhw %p hw_req %p "
                      "!= NULL\n", __func__, ic, lhw, lhw->hw_req));
  
                  lhw->hw_req = hw_req = malloc(sizeof(*hw_req) + ssids_len +
                      s6ghzlen + chan_len + lhw->supbands * lhw->scan_ie_len +
                      common_ie_len, M_LKPI80211, M_WAITOK | M_ZERO);
  
                  hw_req->req.flags = 0;                  /* XXX ??? */
                  /* hw_req->req.wdev */
                  hw_req->req.wiphy = hw->wiphy;
                  hw_req->req.no_cck = false;             /* XXX */
  #if 0
                  /* This seems to pessimise default scanning behaviour. */
                  hw_req->req.duration_mandatory = TICKS_2_USEC(ss->ss_mindwell);
                  hw_req->req.duration = TICKS_2_USEC(ss->ss_maxdwell);
  #endif
  #ifdef __notyet__
                  hw_req->req.flags |= NL80211_SCAN_FLAG_RANDOM_ADDR;
                  memcpy(hw_req->req.mac_addr, xxx, IEEE80211_ADDR_LEN);
                  memset(hw_req->req.mac_addr_mask, 0xxx, IEEE80211_ADDR_LEN);
  #endif
  
                  hw_req->req.n_channels = nchan;
                  cpp = (struct linuxkpi_ieee80211_channel **)(hw_req + 1);
                  lc = (struct linuxkpi_ieee80211_channel *)(cpp + nchan);
                  for (i = 0; i < nchan; i++) {
                          *(cpp + i) =
                              (struct linuxkpi_ieee80211_channel *)(lc + i);
                  }
                  for (i = 0; i < nchan; i++) {
                          c = ss->ss_chans[ss->ss_next + i];
  
                          lc->hw_value = c->ic_ieee;
                          lc->center_freq = c->ic_freq;
                          /* lc->flags */
                          lc->band = lkpi_net80211_chan_to_nl80211_band(c);
                          lc->max_power = c->ic_maxpower;
                          /* lc-> ... */
                          lc++;
                  }
  
                  hw_req->req.n_ssids = ssid_count;
                  if (hw_req->req.n_ssids > 0) {
                          ssids = (struct cfg80211_ssid *)lc;
                          hw_req->req.ssids = ssids;
                          for (i = 0; i < ssid_count; i++) {
                                  ssids->ssid_len = ss->ss_ssid[i].len;
                                  memcpy(ssids->ssid, ss->ss_ssid[i].ssid,
                                      ss->ss_ssid[i].len);
                                  ssids++;
                          }
                          s6gp = (struct cfg80211_scan_6ghz_params *)ssids;
                  } else {
                          s6gp = (struct cfg80211_scan_6ghz_params *)lc;
                  }
  
                  /* 6GHz one day. */
                  hw_req->req.n_6ghz_params = 0;
                  hw_req->req.scan_6ghz_params = NULL;
                  hw_req->req.scan_6ghz = false;  /* Weird boolean; not what you think. */
                  /* s6gp->... */
  
                  ie = ieend = (uint8_t *)s6gp;
                  /* Copy per-band IEs, copy common IEs */
                  ieend = lkpi_scan_ies_add(ie, &hw_req->ies, band_mask, vap, hw);
                  hw_req->req.ie = ie;
                  hw_req->req.ie_len = ieend - ie;
  
                  lvif = VAP_TO_LVIF(vap);
                  vif = LVIF_TO_VIF(lvif);
                  error = lkpi_80211_mo_hw_scan(hw, vif, hw_req);
                  if (error != 0) {
                          ieee80211_cancel_scan(vap);
  
                          free(hw_req, M_LKPI80211);
                          lhw->hw_req = NULL;
  
                          /*
                           * XXX-SIGH magic number.
                           * rtw88 has a magic "return 1" if offloading scan is
                           * not possible.  Fall back to sw scan in that case.
                           */
                          if (error == 1) {
                                  lhw->scan_flags &= ~LKPI_LHW_SCAN_HW;
                                  ieee80211_start_scan(vap,
                                      IEEE80211_SCAN_ACTIVE |
                                      IEEE80211_SCAN_NOPICK |
                                      IEEE80211_SCAN_ONCE,
                                      IEEE80211_SCAN_FOREVER,
                                      ss->ss_mindwell ? ss->ss_mindwell : msecs_to_ticks(20),
                                      ss->ss_maxdwell ? ss->ss_maxdwell : msecs_to_ticks(200),
                                      vap->iv_des_nssid, vap->iv_des_ssid);
                                  goto sw_scan;
                          }
  
                          ic_printf(ic, "ERROR: %s: hw_scan returned %d\n",
                              __func__, error);
                  }
          }
  }
  
  static void
  lkpi_ic_scan_end(struct ieee80211com *ic)
  {
          struct lkpi_hw *lhw;
  
          lhw = ic->ic_softc;
          if ((lhw->scan_flags & LKPI_LHW_SCAN_RUNNING) == 0) {
                  return;
          }
  
          if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0) {
                  struct ieee80211_scan_state *ss;
                  struct ieee80211vap *vap;
                  struct ieee80211_hw *hw;
                  struct lkpi_vif *lvif;
                  struct ieee80211_vif *vif;
  
                  ss = ic->ic_scan;
                  vap = ss->ss_vap;
                  hw = LHW_TO_HW(lhw);
                  lvif = VAP_TO_LVIF(vap);
                  vif = LVIF_TO_VIF(lvif);
  
                  lkpi_80211_mo_sw_scan_complete(hw, vif);
  
                  /* Send PS to stop buffering if n80211 does not for us? */
  
                  if (vap->iv_state == IEEE80211_S_SCAN)
                          lkpi_hw_conf_idle(hw, true);
          }
  }
  
  static void
  lkpi_ic_scan_curchan(struct ieee80211_scan_state *ss,
      unsigned long maxdwell)
  {
          struct lkpi_hw *lhw;
  
          lhw = ss->ss_ic->ic_softc;
          if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0)
                  lhw->ic_scan_curchan(ss, maxdwell);
  }
  
  static void
  lkpi_ic_scan_mindwell(struct ieee80211_scan_state *ss)
  {
          struct lkpi_hw *lhw;
  
          lhw = ss->ss_ic->ic_softc;
          if ((lhw->scan_flags & LKPI_LHW_SCAN_HW) == 0)
                  lhw->ic_scan_mindwell(ss);
  }
  
  static void
  lkpi_ic_set_channel(struct ieee80211com *ic)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct ieee80211_channel *c;
          struct linuxkpi_ieee80211_channel *chan;
          int error;
  
          lhw = ic->ic_softc;
  
          /* If we do not support (*config)() save us the work. */
          if (lhw->ops->config == NULL)
                  return;
  
          /* If we have a hw_scan running do not switch channels. */
          if ((lhw->scan_flags & (LKPI_LHW_SCAN_RUNNING|LKPI_LHW_SCAN_HW)) ==
              (LKPI_LHW_SCAN_RUNNING|LKPI_LHW_SCAN_HW))
                  return;
  
          c = ic->ic_curchan;
          if (c == NULL || c == IEEE80211_CHAN_ANYC) {
                  ic_printf(ic, "%s: c %p ops->config %p\n", __func__,
                      c, lhw->ops->config);
                  return;
          }
  
          chan = lkpi_find_lkpi80211_chan(lhw, c);
          if (chan == NULL) {
                  ic_printf(ic, "%s: c %p chan %p\n", __func__,
                      c, chan);
                  return;
          }
  
          /* XXX max power for scanning? */
          IMPROVE();
  
          hw = LHW_TO_HW(lhw);
          cfg80211_chandef_create(&hw->conf.chandef, chan,
              NL80211_CHAN_NO_HT);
  
          error = lkpi_80211_mo_config(hw, IEEE80211_CONF_CHANGE_CHANNEL);
          if (error != 0 && error != EOPNOTSUPP) {
                  ic_printf(ic, "ERROR: %s: config %#0x returned %d\n",
                      __func__, IEEE80211_CONF_CHANGE_CHANNEL, error);
                  /* XXX should we unroll to the previous chandef? */
                  IMPROVE();
          } else {
                  /* Update radiotap channels as well. */
                  lhw->rtap_tx.wt_chan_freq = htole16(c->ic_freq);
                  lhw->rtap_tx.wt_chan_flags = htole16(c->ic_flags);
                  lhw->rtap_rx.wr_chan_freq = htole16(c->ic_freq);
                  lhw->rtap_rx.wr_chan_flags = htole16(c->ic_flags);
          }
  
          /* Currently PS is hard coded off! Not sure it belongs here. */
          IMPROVE();
          if (ieee80211_hw_check(hw, SUPPORTS_PS) &&
              (hw->conf.flags & IEEE80211_CONF_PS) != 0) {
                  hw->conf.flags &= ~IEEE80211_CONF_PS;
                  error = lkpi_80211_mo_config(hw, IEEE80211_CONF_CHANGE_PS);
                  if (error != 0 && error != EOPNOTSUPP)
                          ic_printf(ic, "ERROR: %s: config %#0x returned "
                              "%d\n", __func__, IEEE80211_CONF_CHANGE_PS,
                              error);
          }
  }
  
  static struct ieee80211_node *
  lkpi_ic_node_alloc(struct ieee80211vap *vap,
      const uint8_t mac[IEEE80211_ADDR_LEN])
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          struct ieee80211_node *ni;
          struct ieee80211_hw *hw;
          struct lkpi_sta *lsta;
  
          ic = vap->iv_ic;
          lhw = ic->ic_softc;
  
          /* We keep allocations de-coupled so we can deal with the two worlds. */
          if (lhw->ic_node_alloc == NULL)
                  return (NULL);
  
          ni = lhw->ic_node_alloc(vap, mac);
          if (ni == NULL)
                  return (NULL);
  
          hw = LHW_TO_HW(lhw);
          lsta = lkpi_lsta_alloc(vap, mac, hw, ni);
          if (lsta == NULL) {
                  if (lhw->ic_node_free != NULL)
                          lhw->ic_node_free(ni);
                  return (NULL);
          }
  
          return (ni);
  }
  
  static int
  lkpi_ic_node_init(struct ieee80211_node *ni)
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          struct lkpi_sta *lsta;
          int error;
  
          ic = ni->ni_ic;
          lhw = ic->ic_softc;
  
          if (lhw->ic_node_init != NULL) {
                  error = lhw->ic_node_init(ni);
                  if (error != 0)
                          return (error);
          }
  
          lsta = ni->ni_drv_data;
  
          /* Now take the reference before linking it to the table. */
          lsta->ni = ieee80211_ref_node(ni);
  
          /* XXX-BZ Sync other state over. */
          IMPROVE();
  
          return (0);
  }
  
  static void
  lkpi_ic_node_cleanup(struct ieee80211_node *ni)
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
  
          ic = ni->ni_ic;
          lhw = ic->ic_softc;
  
          /* XXX-BZ remove from driver, ... */
          IMPROVE();
  
          if (lhw->ic_node_cleanup != NULL)
                  lhw->ic_node_cleanup(ni);
  }
  
  static void
  lkpi_ic_node_free(struct ieee80211_node *ni)
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          struct lkpi_sta *lsta;
  
          ic = ni->ni_ic;
          lhw = ic->ic_softc;
          lsta = ni->ni_drv_data;
          if (lsta == NULL)
                  goto out;
  
          /* XXX-BZ free resources, ... */
          IMPROVE();
  
          /* Flush mbufq (make sure to release ni refs!). */
  #ifdef __notyet__
          KASSERT(mbufq_len(&lsta->txq) == 0, ("%s: lsta %p has txq len %d != 0\n",
              __func__, lsta, mbufq_len(&lsta->txq)));
  #endif
          /* Drain taskq. */
  
          /* Drain sta->txq[] */
          mtx_destroy(&lsta->txq_mtx);
  
          /* Remove lsta if added_to_drv. */
  
          /* Remove lsta from vif */
          /* Remove ref from lsta node... */
          /* Free lsta. */
          lkpi_lsta_remove(lsta, VAP_TO_LVIF(ni->ni_vap));
  
  out:
          if (lhw->ic_node_free != NULL)
                  lhw->ic_node_free(ni);
  }
  
  static int
  lkpi_ic_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
          const struct ieee80211_bpf_params *params __unused)
  {
          struct lkpi_sta *lsta;
  
          lsta = ni->ni_drv_data;
  
          /* Queue the packet and enqueue the task to handle it. */
          LKPI_80211_LSTA_LOCK(lsta);
          mbufq_enqueue(&lsta->txq, m);
          LKPI_80211_LSTA_UNLOCK(lsta);
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_TX)
                  printf("%s:%d lsta %p ni %p %6D mbuf_qlen %d\n",
                      __func__, __LINE__, lsta, ni, ni->ni_macaddr, ":",
                      mbufq_len(&lsta->txq));
  #endif
  
          taskqueue_enqueue(taskqueue_thread, &lsta->txq_task);
          return (0);
  }
  
  static void
  lkpi_80211_txq_tx_one(struct lkpi_sta *lsta, struct mbuf *m)
  {
          struct ieee80211_node *ni;
  #ifndef LKPI_80211_HW_CRYPTO
          struct ieee80211_frame *wh;
  #endif
          struct ieee80211_key *k;
          struct sk_buff *skb;
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          struct ieee80211_channel *c;
          struct ieee80211_tx_control control;
          struct ieee80211_tx_info *info;
          struct ieee80211_sta *sta;
          struct ieee80211_hdr *hdr;
          void *buf;
          uint8_t ac, tid;
  
          M_ASSERTPKTHDR(m);
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_TX_DUMP)
                  hexdump(mtod(m, const void *), m->m_len, "RAW TX (plain) ", 0);
  #endif
  
          ni = lsta->ni;
          k = NULL;
  #ifndef LKPI_80211_HW_CRYPTO
          /* Encrypt the frame if need be; XXX-BZ info->control.hw_key. */
          wh = mtod(m, struct ieee80211_frame *);
          if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
                  /* Retrieve key for TX && do software encryption. */
                  k = ieee80211_crypto_encap(ni, m);
                  if (k == NULL) {
                          ieee80211_free_node(ni);
                          m_freem(m);
                          return;
                  }
          }
  #endif
  
          ic = ni->ni_ic;
          lhw = ic->ic_softc;
          hw = LHW_TO_HW(lhw);
          c = ni->ni_chan;
  
          if (ieee80211_radiotap_active_vap(ni->ni_vap)) {
                  struct lkpi_radiotap_tx_hdr *rtap;
  
                  rtap = &lhw->rtap_tx;
                  rtap->wt_flags = 0;
                  if (k != NULL)
                          rtap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
                  if (m->m_flags & M_FRAG)
                          rtap->wt_flags |= IEEE80211_RADIOTAP_F_FRAG;
                  IMPROVE();
                  rtap->wt_rate = 0;
                  if (c != NULL && c != IEEE80211_CHAN_ANYC) {
                          rtap->wt_chan_freq = htole16(c->ic_freq);
                          rtap->wt_chan_flags = htole16(c->ic_flags);
                  }
  
                  ieee80211_radiotap_tx(ni->ni_vap, m);
          }
  
          /*
           * net80211 should handle hw->extra_tx_headroom.
           * Though for as long as we are copying we don't mind.
           * XXX-BZ rtw88 asks for too much headroom for ipv6+tcp:
           * https://lists.freebsd.org/archives/freebsd-transport/2022-February/000012.html
           */
          skb = dev_alloc_skb(hw->extra_tx_headroom + m->m_pkthdr.len);
          if (skb == NULL) {
                  printf("XXX ERROR %s: skb alloc failed\n", __func__);
                  ieee80211_free_node(ni);
                  m_freem(m);
                  return;
          }
          skb_reserve(skb, hw->extra_tx_headroom);
  
          /* XXX-BZ we need a SKB version understanding mbuf. */
          /* Save the mbuf for ieee80211_tx_complete(). */
          skb->m_free_func = lkpi_ieee80211_free_skb_mbuf;
          skb->m = m;
  #if 0
          skb_put_data(skb, m->m_data, m->m_pkthdr.len);
  #else
          buf = skb_put(skb, m->m_pkthdr.len);
          m_copydata(m, 0, m->m_pkthdr.len, buf);
  #endif
          /* Save the ni. */
          m->m_pkthdr.PH_loc.ptr = ni;
  
          lvif = VAP_TO_LVIF(ni->ni_vap);
          vif = LVIF_TO_VIF(lvif);
  
          hdr = (void *)skb->data;
          tid = linuxkpi_ieee80211_get_tid(hdr, true);
          if (tid == IEEE80211_NONQOS_TID) { /* == IEEE80211_NUM_TIDS */
                  skb->priority = 0;
                  ac = IEEE80211_AC_BE;
          } else {
                  skb->priority = tid & IEEE80211_QOS_CTL_TID_MASK;
                  ac = tid_to_mac80211_ac[tid & 7];
          }
          skb_set_queue_mapping(skb, ac);
  
          info = IEEE80211_SKB_CB(skb);
          info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
          /* Slight delay; probably only happens on scanning so fine? */
          if (c == NULL || c == IEEE80211_CHAN_ANYC)
                  c = ic->ic_curchan;
          info->band = lkpi_net80211_chan_to_nl80211_band(c);
          info->hw_queue = vif->hw_queue[ac];
          if (m->m_flags & M_EAPOL)
                  info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
          info->control.vif = vif;
          /* XXX-BZ info->control.rates */
  
          lsta = lkpi_find_lsta_by_ni(lvif, ni);
          if (lsta != NULL) {
                  sta = LSTA_TO_STA(lsta);
  #ifdef LKPI_80211_HW_CRYPTO
                  info->control.hw_key = lsta->kc;
  #endif
          } else {
                  sta = NULL;
          }
  
          IMPROVE();
  
          if (sta != NULL) {
                  struct lkpi_txq *ltxq;
  
                  ltxq = NULL;
                  if (!ieee80211_is_data_present(hdr->frame_control)) {
                          if (vif->type == NL80211_IFTYPE_STATION &&
                              lsta->added_to_drv &&
                              sta->txq[IEEE80211_NUM_TIDS] != NULL)
                                  ltxq = TXQ_TO_LTXQ(sta->txq[IEEE80211_NUM_TIDS]);
                  } else if (lsta->added_to_drv &&
                      sta->txq[skb->priority] != NULL) {
                          ltxq = TXQ_TO_LTXQ(sta->txq[skb->priority]);
                  }
                  if (ltxq == NULL)
                          goto ops_tx;
  
                  KASSERT(ltxq != NULL, ("%s: lsta %p sta %p m %p skb %p "
                      "ltxq %p != NULL\n", __func__, lsta, sta, m, skb, ltxq));
  
                  skb_queue_tail(&ltxq->skbq, skb);
  #ifdef LINUXKPI_DEBUG_80211
                  if (linuxkpi_debug_80211 & D80211_TRACE_TX)
                          printf("%s:%d mo_wake_tx_queue :: %d %u lsta %p sta %p "
                              "ni %p %6D skb %p lxtq %p { qlen %u, ac %d tid %u } "
                              "WAKE_TX_Q ac %d prio %u qmap %u\n",
                              __func__, __LINE__,
                              curthread->td_tid, (unsigned int)ticks,
                              lsta, sta, ni, ni->ni_macaddr, ":", skb, ltxq,
                              skb_queue_len(&ltxq->skbq), ltxq->txq.ac,
                              ltxq->txq.tid, ac, skb->priority, skb->qmap);
  #endif
                  lkpi_80211_mo_wake_tx_queue(hw, &ltxq->txq);
                  return;
          }
  
  ops_tx:
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_TX)
                  printf("%s:%d mo_tx :: lsta %p sta %p ni %p %6D skb %p "
                      "TX ac %d prio %u qmap %u\n",
                      __func__, __LINE__, lsta, sta, ni, ni->ni_macaddr, ":",
                      skb, ac, skb->priority, skb->qmap);
  #endif
          memset(&control, 0, sizeof(control));
          control.sta = sta;
  
          lkpi_80211_mo_tx(hw, &control, skb);
          return;
  }
  
  static void
  lkpi_80211_txq_task(void *ctx, int pending)
  {
          struct lkpi_sta *lsta;
          struct mbufq mq;
          struct mbuf *m;
  
          lsta = ctx;
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_TX)
                  printf("%s:%d lsta %p ni %p %6D pending %d mbuf_qlen %d\n",
                      __func__, __LINE__, lsta, lsta->ni, lsta->ni->ni_macaddr, ":",
                      pending, mbufq_len(&lsta->txq));
  #endif
  
          mbufq_init(&mq, IFQ_MAXLEN);
  
          LKPI_80211_LSTA_LOCK(lsta);
          mbufq_concat(&mq, &lsta->txq);
          LKPI_80211_LSTA_UNLOCK(lsta);
  
          m = mbufq_dequeue(&mq);
          while (m != NULL) {
                  lkpi_80211_txq_tx_one(lsta, m);
                  m = mbufq_dequeue(&mq);
          }
  }
  
  static int
  lkpi_ic_transmit(struct ieee80211com *ic, struct mbuf *m)
  {
  
          /* XXX TODO */
          IMPROVE();
  
          /* Quick and dirty cheating hack. */
          struct ieee80211_node *ni;
  
          ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
          return (lkpi_ic_raw_xmit(ni, m, NULL));
  }
  
  static void
  lkpi_ic_getradiocaps(struct ieee80211com *ic, int maxchan,
      int *n, struct ieee80211_channel *c)
  {
          struct lkpi_hw *lhw;
          struct ieee80211_hw *hw;
          struct linuxkpi_ieee80211_channel *channels;
          uint8_t bands[IEEE80211_MODE_BYTES];
          int chan_flags, error, i, nchans;
  
          /* Channels */
          lhw = ic->ic_softc;
          hw = LHW_TO_HW(lhw);
  
          /* NL80211_BAND_2GHZ */
          nchans = 0;
          if (hw->wiphy->bands[NL80211_BAND_2GHZ] != NULL)
                  nchans = hw->wiphy->bands[NL80211_BAND_2GHZ]->n_channels;
          if (nchans > 0) {
                  memset(bands, 0, sizeof(bands));
                  chan_flags = 0;
                  setbit(bands, IEEE80211_MODE_11B);
                  /* XXX-BZ unclear how to check for 11g. */
                  setbit(bands, IEEE80211_MODE_11G);
  #ifdef __notyet__
                  if (hw->wiphy->bands[NL80211_BAND_2GHZ]->ht_cap.ht_supported) {
                          setbit(bands, IEEE80211_MODE_11NG);
                          chan_flags |= NET80211_CBW_FLAG_HT40;
                  }
  #endif
  
                  channels = hw->wiphy->bands[NL80211_BAND_2GHZ]->channels;
                  for (i = 0; i < nchans && *n < maxchan; i++) {
                          uint32_t nflags = 0;
                          int cflags = chan_flags;
  
                          if (channels[i].flags & IEEE80211_CHAN_DISABLED) {
                                  printf("%s: %s: Skipping disabled chan "
                                      "[%u/%u/%#x]\n", ic->ic_name, __func__,
                                      channels[i].hw_value,
                                      channels[i].center_freq, channels[i].flags);
                                  continue;
                          }
                          if (channels[i].flags & IEEE80211_CHAN_NO_IR)
                                  nflags |= (IEEE80211_CHAN_NOADHOC|IEEE80211_CHAN_PASSIVE);
                          if (channels[i].flags & IEEE80211_CHAN_RADAR)
                                  nflags |= IEEE80211_CHAN_DFS;
                          if (channels[i].flags & IEEE80211_CHAN_NO_160MHZ)
                                  cflags &= ~(NET80211_CBW_FLAG_VHT160|NET80211_CBW_FLAG_VHT80P80);
                          if (channels[i].flags & IEEE80211_CHAN_NO_80MHZ)
                                  cflags &= ~NET80211_CBW_FLAG_VHT80;
                          /* XXX how to map the remaining enum ieee80211_channel_flags? */
                          if (channels[i].flags & IEEE80211_CHAN_NO_HT40)
                                  cflags &= ~NET80211_CBW_FLAG_HT40;
  
                          error = ieee80211_add_channel_cbw(c, maxchan, n,
                              channels[i].hw_value, channels[i].center_freq,
                              channels[i].max_power,
                              nflags, bands, chan_flags);
                          /* net80211::ENOBUFS: *n >= maxchans */
                          if (error != 0 && error != ENOBUFS)
                                  printf("%s: %s: Adding chan %u/%u/%#x/%#x/%#x/%#x "
                                      "returned error %d\n", ic->ic_name,
                                      __func__, channels[i].hw_value,
                                      channels[i].center_freq, channels[i].flags,
                                      nflags, chan_flags, cflags, error);
                          if (error != 0)
                                  break;
                  }
          }
  
          /* NL80211_BAND_5GHZ */
          nchans = 0;
          if (hw->wiphy->bands[NL80211_BAND_5GHZ] != NULL)
                  nchans = hw->wiphy->bands[NL80211_BAND_5GHZ]->n_channels;
          if (nchans > 0) {
                  memset(bands, 0, sizeof(bands));
                  chan_flags = 0;
                  setbit(bands, IEEE80211_MODE_11A);
  #ifdef __not_yet__
                  if (hw->wiphy->bands[NL80211_BAND_5GHZ]->ht_cap.ht_supported) {
                          setbit(bands, IEEE80211_MODE_11NA);
                          chan_flags |= NET80211_CBW_FLAG_HT40;
                  }
                  if (hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.vht_supported){
  
                          ic->ic_flags_ext |= IEEE80211_FEXT_VHT;
                          ic->ic_vhtcaps =
                              hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap;
  
                          setbit(bands, IEEE80211_MODE_VHT_5GHZ);
                          chan_flags |= NET80211_CBW_FLAG_VHT80;
                          if (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(
                              ic->ic_vhtcaps))
                                  chan_flags |= NET80211_CBW_FLAG_VHT160;
                          if (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160_80P80MHZ(
                              ic->ic_vhtcaps))
                                  chan_flags |= NET80211_CBW_FLAG_VHT80P80;
                  }
  #endif
  
                  channels = hw->wiphy->bands[NL80211_BAND_5GHZ]->channels;
                  for (i = 0; i < nchans && *n < maxchan; i++) {
                          uint32_t nflags = 0;
                          int cflags = chan_flags;
  
                          if (channels[i].flags & IEEE80211_CHAN_DISABLED) {
                                  printf("%s: %s: Skipping disabled chan "
                                      "[%u/%u/%#x]\n", ic->ic_name, __func__,
                                      channels[i].hw_value,
                                      channels[i].center_freq, channels[i].flags);
                                  continue;
                          }
                          if (channels[i].flags & IEEE80211_CHAN_NO_IR)
                                  nflags |= (IEEE80211_CHAN_NOADHOC|IEEE80211_CHAN_PASSIVE);
                          if (channels[i].flags & IEEE80211_CHAN_RADAR)
                                  nflags |= IEEE80211_CHAN_DFS;
                          if (channels[i].flags & IEEE80211_CHAN_NO_160MHZ)
                                  cflags &= ~(NET80211_CBW_FLAG_VHT160|NET80211_CBW_FLAG_VHT80P80);
                          if (channels[i].flags & IEEE80211_CHAN_NO_80MHZ)
                                  cflags &= ~NET80211_CBW_FLAG_VHT80;
                          /* XXX hwo to map the remaining enum ieee80211_channel_flags? */
                          if (channels[i].flags & IEEE80211_CHAN_NO_HT40)
                                  cflags &= ~NET80211_CBW_FLAG_HT40;
  
                          error = ieee80211_add_channel_cbw(c, maxchan, n,
                              channels[i].hw_value, channels[i].center_freq,
                              channels[i].max_power,
                              nflags, bands, chan_flags);
                          /* net80211::ENOBUFS: *n >= maxchans */
                          if (error != 0 && error != ENOBUFS)
                                  printf("%s: %s: Adding chan %u/%u/%#x/%#x/%#x/%#x "
                                      "returned error %d\n", ic->ic_name,
                                      __func__, channels[i].hw_value,
                                      channels[i].center_freq, channels[i].flags,
                                      nflags, chan_flags, cflags, error);
                          if (error != 0)
                                  break;
                  }
          }
  }
  
  static void *
  lkpi_ieee80211_ifalloc(void)
  {
          struct ieee80211com *ic;
  
          ic = malloc(sizeof(*ic), M_LKPI80211, M_WAITOK | M_ZERO);
          if (ic == NULL)
                  return (NULL);
  
          /* Setting these happens later when we have device information. */
          ic->ic_softc = NULL;
          ic->ic_name = "linuxkpi";
  
          return (ic);
  }
  
  struct ieee80211_hw *
  linuxkpi_ieee80211_alloc_hw(size_t priv_len, const struct ieee80211_ops *ops)
  {
          struct ieee80211_hw *hw;
          struct lkpi_hw *lhw;
          struct wiphy *wiphy;
  
          /* Get us and the driver data also allocated. */
          wiphy = wiphy_new(&linuxkpi_mac80211cfgops, sizeof(*lhw) + priv_len);
          if (wiphy == NULL)
                  return (NULL);
  
          lhw = wiphy_priv(wiphy);
          lhw->ops = ops;
  
          mtx_init(&lhw->mtx, "lhw", NULL, MTX_DEF | MTX_RECURSE);
          sx_init_flags(&lhw->lvif_sx, "lhw-lvif", SX_RECURSE | SX_DUPOK);
          TAILQ_INIT(&lhw->lvif_head);
  
          /*
           * XXX-BZ TODO make sure there is a "_null" function to all ops
           * not initialized.
           */
          hw = LHW_TO_HW(lhw);
          hw->wiphy = wiphy;
          hw->conf.flags |= IEEE80211_CONF_IDLE;
          hw->priv = (void *)(lhw + 1);
  
          /* BSD Specific. */
          lhw->ic = lkpi_ieee80211_ifalloc();
          if (lhw->ic == NULL) {
                  ieee80211_free_hw(hw);
                  return (NULL);
          }
  
          IMPROVE();
  
          return (hw);
  }
  
  void
  linuxkpi_ieee80211_iffree(struct ieee80211_hw *hw)
  {
          struct lkpi_hw *lhw;
  
          lhw = HW_TO_LHW(hw);
          free(lhw->ic, M_LKPI80211);
          lhw->ic = NULL;
  
          /* Cleanup more of lhw here or in wiphy_free()? */
          sx_destroy(&lhw->lvif_sx);
          mtx_destroy(&lhw->mtx);
          IMPROVE();
  }
  
  void
  linuxkpi_set_ieee80211_dev(struct ieee80211_hw *hw, char *name)
  {
          struct lkpi_hw *lhw;
          struct ieee80211com *ic;
  
          lhw = HW_TO_LHW(hw);
          ic = lhw->ic;
  
          /* Now set a proper name before ieee80211_ifattach(). */
          ic->ic_softc = lhw;
          ic->ic_name = name;
  
          /* XXX-BZ do we also need to set wiphy name? */
  }
  
  struct ieee80211_hw *
  linuxkpi_wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  {
          struct lkpi_hw *lhw;
  
          lhw = wiphy_priv(wiphy);
          return (LHW_TO_HW(lhw));
  }
  
  static void
  lkpi_radiotap_attach(struct lkpi_hw *lhw)
  {
          struct ieee80211com *ic;
  
          ic = lhw->ic;
          ieee80211_radiotap_attach(ic,
              &lhw->rtap_tx.wt_ihdr, sizeof(lhw->rtap_tx),
              LKPI_RTAP_TX_FLAGS_PRESENT,
              &lhw->rtap_rx.wr_ihdr, sizeof(lhw->rtap_rx),
              LKPI_RTAP_RX_FLAGS_PRESENT);
  }
  
  int
  linuxkpi_ieee80211_ifattach(struct ieee80211_hw *hw)
  {
          struct ieee80211com *ic;
          struct lkpi_hw *lhw;
          int band, i;
  
          lhw = HW_TO_LHW(hw);
          ic = lhw->ic;
  
          /* We do it this late as wiphy->dev should be set for the name. */
          lhw->workq = alloc_ordered_workqueue(wiphy_name(hw->wiphy), 0);
          if (lhw->workq == NULL)
                  return (-EAGAIN);
  
          /* XXX-BZ figure this out how they count his... */
          if (!is_zero_ether_addr(hw->wiphy->perm_addr)) {
                  IEEE80211_ADDR_COPY(ic->ic_macaddr,
                      hw->wiphy->perm_addr);
          } else if (hw->wiphy->n_addresses > 0) {
                  /* We take the first one. */
                  IEEE80211_ADDR_COPY(ic->ic_macaddr,
                      hw->wiphy->addresses[0].addr);
          } else {
                  ic_printf(ic, "%s: warning, no hardware address!\n", __func__);
          }
  
  #ifdef __not_yet__
          /* See comment in lkpi_80211_txq_tx_one(). */
          ic->ic_headroom = hw->extra_tx_headroom;
  #endif
  
          ic->ic_phytype = IEEE80211_T_OFDM;      /* not only, but not used */
          ic->ic_opmode = IEEE80211_M_STA;
  
          /* Set device capabilities. */
          /* XXX-BZ we need to get these from linux80211/drivers and convert. */
          ic->ic_caps =
              IEEE80211_C_STA |
              IEEE80211_C_MONITOR |
              IEEE80211_C_WPA |           /* WPA/RSN */
  #ifdef LKPI_80211_WME
              IEEE80211_C_WME |
  #endif
  #if 0
              IEEE80211_C_PMGT |
  #endif
              IEEE80211_C_SHSLOT |        /* short slot time supported */
              IEEE80211_C_SHPREAMBLE      /* short preamble supported */
              ;
  #if 0
          /* Scanning is a different kind of beast to re-work. */
          ic->ic_caps |= IEEE80211_C_BGSCAN;
  #endif
          if (lhw->ops->hw_scan) {
                  /*
                   * Advertise full-offload scanning.
                   *
                   * Not limiting to SINGLE_SCAN_ON_ALL_BANDS here as otherwise
                   * we essentially disable hw_scan for all drivers not setting
                   * the flag.
                   */
                  ic->ic_flags_ext |= IEEE80211_FEXT_SCAN_OFFLOAD;
                  lhw->scan_flags |= LKPI_LHW_SCAN_HW;
          }
  
  #ifdef __notyet__
          ic->ic_htcaps = IEEE80211_HTC_HT        /* HT operation */
                      | IEEE80211_HTC_AMPDU       /* A-MPDU tx/rx */
                      | IEEE80211_HTC_AMSDU       /* A-MSDU tx/rx */
                      | IEEE80211_HTCAP_MAXAMSDU_3839
                                                  /* max A-MSDU length */
                      | IEEE80211_HTCAP_SMPS_OFF; /* SM power save off */
          ic->ic_htcaps |= IEEE80211_HTCAP_SHORTGI20;
          ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40 | IEEE80211_HTCAP_SHORTGI40;
          ic->ic_htcaps |= IEEE80211_HTCAP_TXSTBC;
  #endif
  
          /*
           * The wiphy variables report bitmasks of avail antennas.
           * (*get_antenna) get the current bitmask sets which can be
           * altered by (*set_antenna) for some drivers.
           * XXX-BZ will the count alone do us much good long-term in net80211?
           */
          if (hw->wiphy->available_antennas_rx ||
              hw->wiphy->available_antennas_tx) {
                  uint32_t rxs, txs;
  
                  if (lkpi_80211_mo_get_antenna(hw, &txs, &rxs) == 0) {
                          ic->ic_rxstream = bitcount32(rxs);
                          ic->ic_txstream = bitcount32(txs);
                  }
          }
  
          ic->ic_cryptocaps = 0;
  #ifdef LKPI_80211_HW_CRYPTO
          if (hw->wiphy->n_cipher_suites > 0) {
                  for (i = 0; i < hw->wiphy->n_cipher_suites; i++)
                          ic->ic_cryptocaps |= lkpi_l80211_to_net80211_cyphers(
                              hw->wiphy->cipher_suites[i]);
          }
  #endif
  
          lkpi_ic_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
              ic->ic_channels);
  
          ieee80211_ifattach(ic);
  
          ic->ic_update_mcast = lkpi_ic_update_mcast;
          ic->ic_update_promisc = lkpi_ic_update_promisc;
          ic->ic_update_chw = lkpi_ic_update_chw;
          ic->ic_parent = lkpi_ic_parent;
          ic->ic_scan_start = lkpi_ic_scan_start;
          ic->ic_scan_end = lkpi_ic_scan_end;
          ic->ic_set_channel = lkpi_ic_set_channel;
          ic->ic_transmit = lkpi_ic_transmit;
          ic->ic_raw_xmit = lkpi_ic_raw_xmit;
          ic->ic_vap_create = lkpi_ic_vap_create;
          ic->ic_vap_delete = lkpi_ic_vap_delete;
          ic->ic_getradiocaps = lkpi_ic_getradiocaps;
          ic->ic_wme.wme_update = lkpi_ic_wme_update;
  
          lhw->ic_scan_curchan = ic->ic_scan_curchan;
          ic->ic_scan_curchan = lkpi_ic_scan_curchan;
          lhw->ic_scan_mindwell = ic->ic_scan_mindwell;
          ic->ic_scan_mindwell = lkpi_ic_scan_mindwell;
  
          lhw->ic_node_alloc = ic->ic_node_alloc;
          ic->ic_node_alloc = lkpi_ic_node_alloc;
          lhw->ic_node_init = ic->ic_node_init;
          ic->ic_node_init = lkpi_ic_node_init;
          lhw->ic_node_cleanup = ic->ic_node_cleanup;
          ic->ic_node_cleanup = lkpi_ic_node_cleanup;
          lhw->ic_node_free = ic->ic_node_free;
          ic->ic_node_free = lkpi_ic_node_free;
  
          lkpi_radiotap_attach(lhw);
  
          /*
           * Assign the first possible channel for now;  seems Realtek drivers
           * expect one.
           * Also remember the amount of bands we support and the most rates
           * in any band so we can scale [(ext) sup rates] IE(s) accordingly.
           */
          lhw->supbands = lhw->max_rates = 0;
          for (band = 0; band < NUM_NL80211_BANDS &&
              hw->conf.chandef.chan == NULL; band++) {
                  struct ieee80211_supported_band *supband;
                  struct linuxkpi_ieee80211_channel *channels;
  
                  supband = hw->wiphy->bands[band];
                  if (supband == NULL || supband->n_channels == 0)
                          continue;
  
                  lhw->supbands++;
                  lhw->max_rates = max(lhw->max_rates, supband->n_bitrates);
  
                  channels = supband->channels;
                  for (i = 0; i < supband->n_channels; i++) {
  
                          if (channels[i].flags & IEEE80211_CHAN_DISABLED)
                                  continue;
  
                          cfg80211_chandef_create(&hw->conf.chandef, &channels[i],
                              NL80211_CHAN_NO_HT);
                          break;
                  }
          }
  
          IMPROVE("see net80211::ieee80211_chan_init vs. wiphy->bands[].bitrates possibly in lkpi_ic_getradiocaps?");
  
          /* Make sure we do not support more than net80211 is willing to take. */
          if (lhw->max_rates > IEEE80211_RATE_MAXSIZE) {
                  ic_printf(ic, "%s: limiting max_rates %d to %d!\n", __func__,
                      lhw->max_rates, IEEE80211_RATE_MAXSIZE);
                  lhw->max_rates = IEEE80211_RATE_MAXSIZE;
          }
  
          /*
           * The maximum supported bitrates on any band + size for
           * DSSS Parameter Set give our per-band IE size.
           * XXX-BZ FIXME add HT VHT ... later
           * SSID is the responsibility of the driver and goes on the side.
           * The user specified bits coming from the vap go into the
           * "common ies" fields.
           */
          lhw->scan_ie_len = 2 + IEEE80211_RATE_SIZE;
          if (lhw->max_rates > IEEE80211_RATE_SIZE)
                  lhw->scan_ie_len += 2 + (lhw->max_rates - IEEE80211_RATE_SIZE);
          /*
           * net80211 does not seem to support the DSSS Parameter Set but some of
           * the drivers insert it so calculate the extra fixed space in.
           */
          lhw->scan_ie_len += 2 + 1;
  
          /* Reduce the max_scan_ie_len "left" by the amount we consume already. */
          if (hw->wiphy->max_scan_ie_len > 0)
                  hw->wiphy->max_scan_ie_len -= lhw->scan_ie_len;
  
          if (bootverbose)
                  ieee80211_announce(ic);
  
          return (0);
  }
  
  void
  linuxkpi_ieee80211_ifdetach(struct ieee80211_hw *hw)
  {
          struct lkpi_hw *lhw;
          struct ieee80211com *ic;
  
          lhw = HW_TO_LHW(hw);
          ic = lhw->ic;
          ieee80211_ifdetach(ic);
  }
  
  void
  linuxkpi_ieee80211_iterate_interfaces(struct ieee80211_hw *hw,
      enum ieee80211_iface_iter flags,
      void(*iterfunc)(void *, uint8_t *, struct ieee80211_vif *),
      void *arg)
  {
          struct lkpi_hw *lhw;
          struct lkpi_vif *lvif;
          struct ieee80211_vif *vif;
          bool active, atomic, nin_drv;
  
          lhw = HW_TO_LHW(hw);
  
          if (flags & ~(IEEE80211_IFACE_ITER_NORMAL|
              IEEE80211_IFACE_ITER_RESUME_ALL|
              IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER|
              IEEE80211_IFACE_ITER__ACTIVE|IEEE80211_IFACE_ITER__ATOMIC)) {
                  ic_printf(lhw->ic, "XXX TODO %s flags(%#x) not yet supported.\n",
                      __func__, flags);
          }
  
          active = (flags & IEEE80211_IFACE_ITER__ACTIVE) != 0;
          atomic = (flags & IEEE80211_IFACE_ITER__ATOMIC) != 0;
          nin_drv = (flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) != 0;
  
          if (atomic)
                  LKPI_80211_LHW_LVIF_LOCK(lhw);
          TAILQ_FOREACH(lvif, &lhw->lvif_head, lvif_entry) {
                  struct ieee80211vap *vap;
  
                  vif = LVIF_TO_VIF(lvif);
  
                  /*
                   * If we want "active" interfaces, we need to distinguish on
                   * whether the driver knows about them or not to be able to
                   * handle the "resume" case correctly.  Skip the ones the
                   * driver does not know about.
                   */
                  if (active && !lvif->added_to_drv &&
                      (flags & IEEE80211_IFACE_ITER_RESUME_ALL) != 0)
                          continue;
  
                  /*
                   * If we shall skip interfaces not added to the driver do so
                   * if we haven't yet.
                   */
                  if (nin_drv && !lvif->added_to_drv)
                          continue;
  
                  /*
                   * Run the iterator function if we are either not asking
                   * asking for active only or if the VAP is "running".
                   */
                  /* XXX-BZ probably should have state in the lvif as well. */
                  vap = LVIF_TO_VAP(lvif);
                  if (!active || (vap->iv_state != IEEE80211_S_INIT))
                          iterfunc(arg, vif->addr, vif);
          }
          if (atomic)
                  LKPI_80211_LHW_LVIF_UNLOCK(lhw);
  }
  
  void
  linuxkpi_ieee80211_iterate_keys(struct ieee80211_hw *hw,
      struct ieee80211_vif *vif,
      void(*iterfunc)(struct ieee80211_hw *, struct ieee80211_vif *,
          struct ieee80211_sta *, struct ieee80211_key_conf *, void *),
      void *arg)
  {
  
          UNIMPLEMENTED;
  }
  
  void
  linuxkpi_ieee80211_iterate_chan_contexts(struct ieee80211_hw *hw,
      void(*iterfunc)(struct ieee80211_hw *, struct ieee80211_chanctx_conf *,
          void *),
      void *arg)
  {
  
          UNIMPLEMENTED;
  }
  
  void
  linuxkpi_ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
     void (*iterfunc)(void *, struct ieee80211_sta *), void *arg)
  {
          struct lkpi_hw *lhw;
          struct lkpi_vif *lvif;
          struct lkpi_sta *lsta;
          struct ieee80211_sta *sta;
  
          KASSERT(hw != NULL && iterfunc != NULL,
              ("%s: hw %p iterfunc %p arg %p\n", __func__, hw, iterfunc, arg));
  
          lhw = HW_TO_LHW(hw);
  
          LKPI_80211_LHW_LVIF_LOCK(lhw);
          TAILQ_FOREACH(lvif, &lhw->lvif_head, lvif_entry) {
  
                  LKPI_80211_LVIF_LOCK(lvif);
                  TAILQ_FOREACH(lsta, &lvif->lsta_head, lsta_entry) {
                          if (!lsta->added_to_drv)
                                  continue;
                          sta = LSTA_TO_STA(lsta);
                          iterfunc(arg, sta);
                  }
                  LKPI_80211_LVIF_UNLOCK(lvif);
          }
          LKPI_80211_LHW_LVIF_UNLOCK(lhw);
  }
  
  int
  linuxkpi_regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
      struct linuxkpi_ieee80211_regdomain *regd)
  {
          struct lkpi_hw *lhw;
          struct ieee80211com *ic;
          struct ieee80211_regdomain *rd;
  
          lhw = wiphy_priv(wiphy);
          ic = lhw->ic;
  
          rd = &ic->ic_regdomain;
          if (rd->isocc[0] == '\0') {
                  rd->isocc[0] = regd->alpha2[0];
                  rd->isocc[1] = regd->alpha2[1];
          }
  
          TODO();
          /* XXX-BZ finish the rest. */
  
          return (0);
  }
  
  void
  linuxkpi_ieee80211_scan_completed(struct ieee80211_hw *hw,
      struct cfg80211_scan_info *info)
  {
          struct lkpi_hw *lhw;
          struct ieee80211com *ic;
          struct ieee80211_scan_state *ss;
  
          lhw = wiphy_priv(hw->wiphy);
          ic = lhw->ic;
          ss = ic->ic_scan;
  
          ieee80211_scan_done(ss->ss_vap);
  
          LKPI_80211_LHW_LOCK(lhw);
          free(lhw->hw_req, M_LKPI80211);
          lhw->hw_req = NULL;
          lhw->scan_flags &= ~LKPI_LHW_SCAN_RUNNING;
          wakeup(lhw);
          LKPI_80211_LHW_UNLOCK(lhw);
  
          return;
  }
  
  void
  linuxkpi_ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
      struct ieee80211_sta *sta, struct napi_struct *napi __unused)
  {
          struct epoch_tracker et;
          struct lkpi_hw *lhw;
          struct ieee80211com *ic;
          struct mbuf *m;
          struct skb_shared_info *shinfo;
          struct ieee80211_rx_status *rx_status;
          struct ieee80211_rx_stats rx_stats;
          struct ieee80211_node *ni;
          struct ieee80211vap *vap;
          struct ieee80211_hdr *hdr;
          struct lkpi_sta *lsta;
          int i, offset, ok;
          int8_t rssi;
          bool is_beacon;
  
          if (skb->len < 2) {
                  /* Need 80211 stats here. */
                  IMPROVE();
                  goto err;
          }
  
          /*
           * For now do the data copy; we can later improve things. Might even
           * have an mbuf backing the skb data then?
           */
          m = m_get2(skb->len, M_NOWAIT, MT_DATA, M_PKTHDR);
          if (m == NULL)
                  goto err;
          m_copyback(m, 0, skb->tail - skb->data, skb->data);
  
          shinfo = skb_shinfo(skb);
          offset = m->m_len;
          for (i = 0; i < shinfo->nr_frags; i++) {
                  m_copyback(m, offset, shinfo->frags[i].size,
                      (uint8_t *)linux_page_address(shinfo->frags[i].page) +
                      shinfo->frags[i].offset);
                  offset += shinfo->frags[i].size;
          }
  
          rx_status = IEEE80211_SKB_RXCB(skb);
  
          hdr = (void *)skb->data;
          is_beacon = ieee80211_is_beacon(hdr->frame_control);
  
  #ifdef LINUXKPI_DEBUG_80211
          if (is_beacon && (linuxkpi_debug_80211 & D80211_TRACE_RX_BEACONS) == 0)
                  goto no_trace_beacons;
  
          if (linuxkpi_debug_80211 & D80211_TRACE_RX)
                  printf("TRACE-RX: %s: skb %p a/l/d/t-len (%u/%u/%u/%u) "
                      "h %p d %p t %p e %p sh %p (%u) m %p plen %u len %u%s\n",
                      __func__, skb, skb->_alloc_len, skb->len, skb->data_len,
                      skb->truesize, skb->head, skb->data, skb->tail, skb->end,
                      shinfo, shinfo->nr_frags,
                      m, m->m_pkthdr.len, m->m_len, is_beacon ? " beacon" : "");
  
          if (linuxkpi_debug_80211 & D80211_TRACE_RX_DUMP)
                  hexdump(mtod(m, const void *), m->m_len, "RX (raw) ", 0);
  
          /* Implement a dump_rxcb() !!! */
          if (linuxkpi_debug_80211 & D80211_TRACE_RX)
                  printf("TRACE %s: RXCB: %ju %ju %u, %#0x, %u, %#0x, %#0x, "
                      "%u band %u, %u { %d %d %d %d }, %d, %#x %#x %#x %#x %u %u %u\n",
                          __func__,
                          (uintmax_t)rx_status->boottime_ns,
                          (uintmax_t)rx_status->mactime,
                          rx_status->device_timestamp,
                          rx_status->flag,
                          rx_status->freq,
                          rx_status->bw,
                          rx_status->encoding,
                          rx_status->ampdu_reference,
                          rx_status->band,
                          rx_status->chains,
                          rx_status->chain_signal[0],
                          rx_status->chain_signal[1],
                          rx_status->chain_signal[2],
                          rx_status->chain_signal[3],
                          rx_status->signal,
                          rx_status->enc_flags,
                          rx_status->he_dcm,
                          rx_status->he_gi,
                          rx_status->he_ru,
                          rx_status->zero_length_psdu_type,
                          rx_status->nss,
                          rx_status->rate_idx);
  no_trace_beacons:
  #endif
  
          memset(&rx_stats, 0, sizeof(rx_stats));
          rx_stats.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
          /* XXX-BZ correct hardcoded rssi and noise floor, how? survey? */
          rx_stats.c_nf = -96;
          if (ieee80211_hw_check(hw, SIGNAL_DBM) &&
              !(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL))
                  rssi = rx_status->signal;
          else
                  rssi = rx_stats.c_nf;
          /*
           * net80211 signal strength data are in .5 dBm units relative to
           * the current noise floor (see comment in ieee80211_node.h).
           */
          rssi -= rx_stats.c_nf;
          rx_stats.c_rssi = rssi * 2;
          rx_stats.r_flags |= IEEE80211_R_BAND;
          rx_stats.c_band =
              lkpi_nl80211_band_to_net80211_band(rx_status->band);
          rx_stats.r_flags |= IEEE80211_R_FREQ | IEEE80211_R_IEEE;
          rx_stats.c_freq = rx_status->freq;
          rx_stats.c_ieee = ieee80211_mhz2ieee(rx_stats.c_freq, rx_stats.c_band);
  
          /* XXX (*sta_statistics)() to get to some of that? */
          /* XXX-BZ dump the FreeBSD version of rx_stats as well! */
  
          lhw = HW_TO_LHW(hw);
          ic = lhw->ic;
  
          ok = ieee80211_add_rx_params(m, &rx_stats);
          if (ok == 0) {
                  m_freem(m);
                  counter_u64_add(ic->ic_ierrors, 1);
                  goto err;
          }
  
          if (sta != NULL) {
                  lsta = STA_TO_LSTA(sta);
                  ni = ieee80211_ref_node(lsta->ni);
          } else {
                  struct ieee80211_frame_min *wh;
  
                  wh = mtod(m, struct ieee80211_frame_min *);
                  ni = ieee80211_find_rxnode(ic, wh);
                  if (ni != NULL)
                          lsta = ni->ni_drv_data;
          }
  
          if (ni != NULL)
                  vap = ni->ni_vap;
          else
                  /*
                   * XXX-BZ can we improve this by looking at the frame hdr
                   * or other meta-data passed up?
                   */
                  vap = TAILQ_FIRST(&ic->ic_vaps);
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_RX)
                  printf("TRACE %s: sta %p lsta %p state %d ni %p vap %p%s\n",
                      __func__, sta, lsta, (lsta != NULL) ? lsta->state : -1,
                      ni, vap, is_beacon ? " beacon" : "");
  #endif
  
          if (ni != NULL && vap != NULL && is_beacon &&
              rx_status->device_timestamp > 0 &&
              m->m_pkthdr.len >= sizeof(struct ieee80211_frame)) {
                  struct lkpi_vif *lvif;
                  struct ieee80211_vif *vif;
                  struct ieee80211_frame *wh;
  
                  wh = mtod(m, struct ieee80211_frame *);
                  if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))
                          goto skip_device_ts;
  
                  lvif = VAP_TO_LVIF(vap);
                  vif = LVIF_TO_VIF(lvif);
  
                  IMPROVE("TIMING_BEACON_ONLY?");
                  /* mac80211 specific (not net80211) so keep it here. */
                  vif->bss_conf.sync_device_ts = rx_status->device_timestamp;
                  /*
                   * net80211 should take care of the other information (sync_tsf,
                   * sync_dtim_count) as otherwise we need to parse the beacon.
                   */
          }
  skip_device_ts:
  
          if (vap != NULL && vap->iv_state > IEEE80211_S_INIT &&
              ieee80211_radiotap_active_vap(vap)) {
                  struct lkpi_radiotap_rx_hdr *rtap;
  
                  rtap = &lhw->rtap_rx;
                  rtap->wr_tsft = rx_status->device_timestamp;
                  rtap->wr_flags = 0;
                  if (rx_status->enc_flags & RX_ENC_FLAG_SHORTPRE)
                          rtap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
                  if (rx_status->enc_flags & RX_ENC_FLAG_SHORT_GI)
                          rtap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTGI;
  #if 0   /* .. or it does not given we strip it below. */
                  if (ieee80211_hw_check(hw, RX_INCLUDES_FCS))
                          rtap->wr_flags |= IEEE80211_RADIOTAP_F_FCS;
  #endif
                  if (rx_status->flag & RX_FLAG_FAILED_FCS_CRC)
                          rtap->wr_flags |= IEEE80211_RADIOTAP_F_BADFCS;
                  rtap->wr_rate = 0;
                  IMPROVE();
                  /* XXX TODO status->encoding / rate_index / bw */
                  rtap->wr_chan_freq = htole16(rx_stats.c_freq);
                  if (ic->ic_curchan->ic_ieee == rx_stats.c_ieee)
                          rtap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags);
                  rtap->wr_dbm_antsignal = rssi;
                  rtap->wr_dbm_antnoise = rx_stats.c_nf;
          }
  
          if (ieee80211_hw_check(hw, RX_INCLUDES_FCS))
                  m_adj(m, -IEEE80211_CRC_LEN);
  
          NET_EPOCH_ENTER(et);
          if (ni != NULL) {
                  ok = ieee80211_input_mimo(ni, m);
                  ieee80211_free_node(ni);
                  if (ok < 0)
                          m_freem(m);
          } else {
                  ok = ieee80211_input_mimo_all(ic, m);
                  /* mbuf got consumed. */
          }
          NET_EPOCH_EXIT(et);
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_RX)
                  printf("TRACE %s: handled frame type %#0x\n", __func__, ok);
  #endif
  
          IMPROVE();
  
  err:
          /* The skb is ours so we can free it :-) */
          kfree_skb(skb);
  }
  
  uint8_t
  linuxkpi_ieee80211_get_tid(struct ieee80211_hdr *hdr, bool nonqos_ok)
  {
          const struct ieee80211_frame *wh;
          uint8_t tid;
  
          /* Linux seems to assume this is a QOS-Data-Frame */
          KASSERT(nonqos_ok || ieee80211_is_data_qos(hdr->frame_control),
             ("%s: hdr %p fc %#06x not qos_data\n", __func__, hdr,
             hdr->frame_control));
  
          wh = (const struct ieee80211_frame *)hdr;
          tid = ieee80211_gettid(wh);
          KASSERT(nonqos_ok || tid == (tid & IEEE80211_QOS_TID), ("%s: tid %u "
             "not expected (%u?)\n", __func__, tid, IEEE80211_NONQOS_TID));
  
          return (tid);
  }
  
  struct wiphy *
  linuxkpi_wiphy_new(const struct cfg80211_ops *ops, size_t priv_len)
  {
          struct lkpi_wiphy *lwiphy;
  
          lwiphy = kzalloc(sizeof(*lwiphy) + priv_len, GFP_KERNEL);
          if (lwiphy == NULL)
                  return (NULL);
          lwiphy->ops = ops;
  
          /* XXX TODO */
          return (LWIPHY_TO_WIPHY(lwiphy));
  }
  
  void
  linuxkpi_wiphy_free(struct wiphy *wiphy)
  {
          struct lkpi_wiphy *lwiphy;
  
          if (wiphy == NULL)
                  return;
  
          lwiphy = WIPHY_TO_LWIPHY(wiphy);
          kfree(lwiphy);
  }
  
  uint32_t
  linuxkpi_ieee80211_channel_to_frequency(uint32_t channel,
      enum nl80211_band band)
  {
  
          switch (band) {
          case NL80211_BAND_2GHZ:
                  return (ieee80211_ieee2mhz(channel, IEEE80211_CHAN_2GHZ));
                  break;
          case NL80211_BAND_5GHZ:
                  return (ieee80211_ieee2mhz(channel, IEEE80211_CHAN_5GHZ));
                  break;
          default:
                  /* XXX abort, retry, error, panic? */
                  break;
          }
  
          return (0);
  }
  
  uint32_t
  linuxkpi_ieee80211_frequency_to_channel(uint32_t freq, uint32_t flags __unused)
  {
  
          return (ieee80211_mhz2ieee(freq, 0));
  }
  
  static struct lkpi_sta *
  lkpi_find_lsta_by_ni(struct lkpi_vif *lvif, struct ieee80211_node *ni)
  {
          struct lkpi_sta *lsta, *temp;
  
          LKPI_80211_LVIF_LOCK(lvif);
          TAILQ_FOREACH_SAFE(lsta, &lvif->lsta_head, lsta_entry, temp) {
                  if (lsta->ni == ni) {
                          LKPI_80211_LVIF_UNLOCK(lvif);
                          return (lsta);
                  }
          }
          LKPI_80211_LVIF_UNLOCK(lvif);
  
          return (NULL);
  }
  
  struct ieee80211_sta *
  linuxkpi_ieee80211_find_sta(struct ieee80211_vif *vif, const u8 *peer)
  {
          struct lkpi_vif *lvif;
          struct lkpi_sta *lsta, *temp;
          struct ieee80211_sta *sta;
  
          lvif = VIF_TO_LVIF(vif);
  
          LKPI_80211_LVIF_LOCK(lvif);
          TAILQ_FOREACH_SAFE(lsta, &lvif->lsta_head, lsta_entry, temp) {
                  sta = LSTA_TO_STA(lsta);
                  if (IEEE80211_ADDR_EQ(sta->addr, peer)) {
                          LKPI_80211_LVIF_UNLOCK(lvif);
                          return (sta);
                  }
          }
          LKPI_80211_LVIF_UNLOCK(lvif);
          return (NULL);
  }
  
  struct ieee80211_sta *
  linuxkpi_ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw,
      const uint8_t *addr, const uint8_t *ourvifaddr)
  {
          struct lkpi_hw *lhw;
          struct lkpi_vif *lvif;
          struct lkpi_sta *lsta;
          struct ieee80211_vif *vif;
          struct ieee80211_sta *sta;
  
          lhw = wiphy_priv(hw->wiphy);
          sta = NULL;
  
          LKPI_80211_LHW_LVIF_LOCK(lhw);
          TAILQ_FOREACH(lvif, &lhw->lvif_head, lvif_entry) {
  
                  /* XXX-BZ check our address from the vif. */
  
                  vif = LVIF_TO_VIF(lvif);
                  if (ourvifaddr != NULL &&
                      !IEEE80211_ADDR_EQ(vif->addr, ourvifaddr))
                          continue;
                  sta = linuxkpi_ieee80211_find_sta(vif, addr);
                  if (sta != NULL)
                          break;
          }
          LKPI_80211_LHW_LVIF_UNLOCK(lhw);
  
          if (sta != NULL) {
                  lsta = STA_TO_LSTA(sta);
                  if (!lsta->added_to_drv)
                          return (NULL);
          }
  
          return (sta);
  }
  
  struct sk_buff *
  linuxkpi_ieee80211_tx_dequeue(struct ieee80211_hw *hw,
      struct ieee80211_txq *txq)
  {
          struct lkpi_txq *ltxq;
          struct sk_buff *skb;
  
          ltxq = TXQ_TO_LTXQ(txq);
          ltxq->seen_dequeue = true;
  
          skb = skb_dequeue(&ltxq->skbq);
  
          return (skb);
  }
  
  void
  linuxkpi_ieee80211_txq_get_depth(struct ieee80211_txq *txq,
      unsigned long *frame_cnt, unsigned long *byte_cnt)
  {
          struct lkpi_txq *ltxq;
          struct sk_buff *skb;
          unsigned long fc, bc;
  
          ltxq = TXQ_TO_LTXQ(txq);
  
          fc = bc = 0;
          skb_queue_walk(&ltxq->skbq, skb) {
                  fc++;
                  bc += skb->len;
          }
          if (frame_cnt)
                  *frame_cnt = fc;
          if (byte_cnt)
                  *byte_cnt = bc;
  
          /* Validate that this is doing the correct thing. */
          /* Should we keep track on en/dequeue? */
          IMPROVE();
  }
  
  /*
   * We are called from ieee80211_free_txskb() or ieee80211_tx_status().
   * The latter tries to derive the success status from the info flags
   * passed back from the driver.  rawx_mit() saves the ni on the m and the
   * m on the skb for us to be able to give feedback to net80211.
   */
  void
  linuxkpi_ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb,
      int status)
  {
          struct ieee80211_node *ni;
          struct mbuf *m;
  
          m = skb->m;
          skb->m = NULL;
  
          if (m != NULL) {
                  ni = m->m_pkthdr.PH_loc.ptr;
                  /* Status: 0 is ok, != 0 is error. */
                  ieee80211_tx_complete(ni, m, status);
                  /* ni & mbuf were consumed. */
          }
  
          kfree_skb(skb);
  }
  
  void
  linuxkpi_ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
  {
          struct ieee80211_tx_info *info;
          struct ieee80211_ratectl_tx_status txs;
          struct ieee80211_node *ni;
          int status;
  
          info = IEEE80211_SKB_CB(skb);
  
          if (skb->m != NULL) {
                  struct mbuf *m;
  
                  m = skb->m;
                  ni = m->m_pkthdr.PH_loc.ptr;
                  memset(&txs, 0, sizeof(txs));
          } else {
                  ni = NULL;
          }
  
          if (info->flags & IEEE80211_TX_STAT_ACK) {
                  status = 0;     /* No error. */
                  txs.status = IEEE80211_RATECTL_TX_SUCCESS;
          } else {
                  status = 1;
                  txs.status = IEEE80211_RATECTL_TX_FAIL_UNSPECIFIED;
          }
  
          if (ni != NULL) {
                  int ridx __unused;
  #ifdef LINUXKPI_DEBUG_80211
                  int old_rate;
  
                  old_rate = ni->ni_vap->iv_bss->ni_txrate;
  #endif
                  txs.pktlen = skb->len;
                  txs.flags |= IEEE80211_RATECTL_STATUS_PKTLEN;
                  if (info->status.rates[0].count > 1) {
                          txs.long_retries = info->status.rates[0].count - 1;     /* 1 + retries in drivers. */
                          txs.flags |= IEEE80211_RATECTL_STATUS_LONG_RETRY;
                  }
  #if 0           /* Unused in net80211 currently. */
                  /* XXX-BZ conver;t check .flags for MCS/VHT/.. */
                  txs.final_rate = info->status.rates[0].idx;
                  txs.flags |= IEEE80211_RATECTL_STATUS_FINAL_RATE;
  #endif
                  if (info->status.is_valid_ack_signal) {
                          txs.rssi = info->status.ack_signal;             /* XXX-BZ CONVERT? */
                          txs.flags |= IEEE80211_RATECTL_STATUS_RSSI;
                  }
  
                  IMPROVE("only update of rate matches but that requires us to get a proper rate");
                  ieee80211_ratectl_tx_complete(ni, &txs);
                  ridx = ieee80211_ratectl_rate(ni->ni_vap->iv_bss, NULL, 0);
  
  #ifdef LINUXKPI_DEBUG_80211
                  if (linuxkpi_debug_80211 & D80211_TRACE_TX) {
                          printf("TX-RATE: %s: old %d new %d ridx %d, "
                              "long_retries %d\n", __func__,
                              old_rate, ni->ni_vap->iv_bss->ni_txrate,
                              ridx, txs.long_retries);
                  }
  #endif
          }
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE_TX)
                  printf("TX-STATUS: %s: hw %p skb %p status %d : flags %#x "
                      "band %u hw_queue %u tx_time_est %d : "
                      "rates [ %u %u %#x, %u %u %#x, %u %u %#x, %u %u %#x ] "
                      "ack_signal %u ampdu_ack_len %u ampdu_len %u antenna %u "
                      "tx_time %u is_valid_ack_signal %u "
                      "status_driver_data [ %p %p ]\n",
                      __func__, hw, skb, status, info->flags,
                      info->band, info->hw_queue, info->tx_time_est,
                      info->status.rates[0].idx, info->status.rates[0].count,
                      info->status.rates[0].flags,
                      info->status.rates[1].idx, info->status.rates[1].count,
                      info->status.rates[1].flags,
                      info->status.rates[2].idx, info->status.rates[2].count,
                      info->status.rates[2].flags,
                      info->status.rates[3].idx, info->status.rates[3].count,
                      info->status.rates[3].flags,
                      info->status.ack_signal, info->status.ampdu_ack_len,
                      info->status.ampdu_len, info->status.antenna,
                      info->status.tx_time, info->status.is_valid_ack_signal,
                      info->status.status_driver_data[0],
                      info->status.status_driver_data[1]);
  #endif
  
          linuxkpi_ieee80211_free_txskb(hw, skb, status);
  }
  
  /*
   * This is an internal bandaid for the moment for the way we glue
   * skbs and mbufs together for TX.  Once we have skbs backed by
   * mbufs this should go away.
   * This is a public function but kept on the private KPI (lkpi_)
   * and is not exposed by a header file.
   */
  static void
  lkpi_ieee80211_free_skb_mbuf(void *p)
  {
          struct ieee80211_node *ni;
          struct mbuf *m;
  
          if (p == NULL)
                  return;
  
          m = (struct mbuf *)p;
          M_ASSERTPKTHDR(m);
  
          ni = m->m_pkthdr.PH_loc.ptr;
          m->m_pkthdr.PH_loc.ptr = NULL;
          if (ni != NULL)
                  ieee80211_free_node(ni);
          m_freem(m);
  }
  
  void
  linuxkpi_ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
      struct delayed_work *w, int delay)
  {
          struct lkpi_hw *lhw;
  
          /* Need to make sure hw is in a stable (non-suspended) state. */
          IMPROVE();
  
          lhw = HW_TO_LHW(hw);
          queue_delayed_work(lhw->workq, w, delay);
  }
  
  void
  linuxkpi_ieee80211_queue_work(struct ieee80211_hw *hw,
      struct work_struct *w)
  {
          struct lkpi_hw *lhw;
  
          /* Need to make sure hw is in a stable (non-suspended) state. */
          IMPROVE();
  
          lhw = HW_TO_LHW(hw);
          queue_work(lhw->workq, w);
  }
  
  struct sk_buff *
  linuxkpi_ieee80211_probereq_get(struct ieee80211_hw *hw, uint8_t *addr,
      uint8_t *ssid, size_t ssid_len, size_t tailroom)
  {
          struct sk_buff *skb;
          struct ieee80211_frame *wh;
          uint8_t *p;
          size_t len;
  
          len = sizeof(*wh);
          len += 2 + ssid_len;
  
          skb = dev_alloc_skb(hw->extra_tx_headroom + len + tailroom);
          if (skb == NULL)
                  return (NULL);
  
          skb_reserve(skb, hw->extra_tx_headroom);
  
          wh = skb_put_zero(skb, sizeof(*wh));
          wh->i_fc[0] = IEEE80211_FC0_VERSION_0;
          wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_PROBE_REQ | IEEE80211_FC0_TYPE_MGT;
          IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr);
          IEEE80211_ADDR_COPY(wh->i_addr2, addr);
          IEEE80211_ADDR_COPY(wh->i_addr3, ieee80211broadcastaddr);
  
          p = skb_put(skb, 2 + ssid_len);
          *p++ = IEEE80211_ELEMID_SSID;
          *p++ = ssid_len;
          if (ssid_len > 0)
                  memcpy(p, ssid, ssid_len);
  
          return (skb);
  }
  
  struct sk_buff *
  linuxkpi_ieee80211_pspoll_get(struct ieee80211_hw *hw,
      struct ieee80211_vif *vif)
  {
          struct lkpi_vif *lvif;
          struct ieee80211vap *vap;
          struct sk_buff *skb;
          struct ieee80211_frame_pspoll *psp;
          uint16_t v;
  
          skb = dev_alloc_skb(hw->extra_tx_headroom + sizeof(*psp));
          if (skb == NULL)
                  return (NULL);
  
          skb_reserve(skb, hw->extra_tx_headroom);
  
          lvif = VIF_TO_LVIF(vif);
          vap = LVIF_TO_VAP(lvif);
  
          psp = skb_put_zero(skb, sizeof(*psp));
          psp->i_fc[0] = IEEE80211_FC0_VERSION_0;
          psp->i_fc[0] |= IEEE80211_FC0_SUBTYPE_PS_POLL | IEEE80211_FC0_TYPE_CTL;
          v = htole16(vif->bss_conf.aid | 1<<15 | 1<<16);
          memcpy(&psp->i_aid, &v, sizeof(v));
          IEEE80211_ADDR_COPY(psp->i_bssid, vap->iv_bss->ni_macaddr);
          IEEE80211_ADDR_COPY(psp->i_ta, vif->addr);
  
          return (skb);
  }
  
  struct sk_buff *
  linuxkpi_ieee80211_nullfunc_get(struct ieee80211_hw *hw,
      struct ieee80211_vif *vif, bool qos)
  {
          struct lkpi_vif *lvif;
          struct ieee80211vap *vap;
          struct sk_buff *skb;
          struct ieee80211_frame *nullf;
  
          skb = dev_alloc_skb(hw->extra_tx_headroom + sizeof(*nullf));
          if (skb == NULL)
                  return (NULL);
  
          skb_reserve(skb, hw->extra_tx_headroom);
  
          lvif = VIF_TO_LVIF(vif);
          vap = LVIF_TO_VAP(lvif);
  
          nullf = skb_put_zero(skb, sizeof(*nullf));
          nullf->i_fc[0] = IEEE80211_FC0_VERSION_0;
          nullf->i_fc[0] |= IEEE80211_FC0_SUBTYPE_NODATA | IEEE80211_FC0_TYPE_DATA;
          nullf->i_fc[1] = IEEE80211_FC1_DIR_TODS;
  
          IEEE80211_ADDR_COPY(nullf->i_addr1, vap->iv_bss->ni_bssid);
          IEEE80211_ADDR_COPY(nullf->i_addr2, vif->addr);
          IEEE80211_ADDR_COPY(nullf->i_addr3, vap->iv_bss->ni_macaddr);
  
          return (skb);
  }
  
  struct wireless_dev *
  linuxkpi_ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
  {
          struct lkpi_vif *lvif;
  
          lvif = VIF_TO_LVIF(vif);
          return (&lvif->wdev);
  }
  
  void
  linuxkpi_ieee80211_connection_loss(struct ieee80211_vif *vif)
  {
          struct lkpi_vif *lvif;
          struct ieee80211vap *vap;
          enum ieee80211_state nstate;
          int arg;
  
          lvif = VIF_TO_LVIF(vif);
          vap = LVIF_TO_VAP(lvif);
  
          /*
           * Go to init; otherwise we need to elaborately check state and
           * handle accordingly, e.g., if in RUN we could call iv_bmiss.
           * Let the statemachine handle all neccessary changes.
           */
          nstate = IEEE80211_S_INIT;
          arg = 0;        /* Not a valid reason. */
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE)
                  ic_printf(vap->iv_ic, "%s: vif %p\n", __func__, vif);
  #endif
          ieee80211_new_state(vap, nstate, arg);
  }
  
  void
  linuxkpi_ieee80211_beacon_loss(struct ieee80211_vif *vif)
  {
          struct lkpi_vif *lvif;
          struct ieee80211vap *vap;
  
          lvif = VIF_TO_LVIF(vif);
          vap = LVIF_TO_VAP(lvif);
  
  #ifdef LINUXKPI_DEBUG_80211
          if (linuxkpi_debug_80211 & D80211_TRACE || vap->iv_state != IEEE80211_S_RUN)
                  ic_printf(vap->iv_ic, "%s: vif %p vap %p state %s\n", __func__,
                      vif, vap, ieee80211_state_name[vap->iv_state]);
  #endif
          ieee80211_beacon_miss(vap->iv_ic);
  }
  
  /* -------------------------------------------------------------------------- */
  
  struct lkpi_cfg80211_bss {
          u_int refcnt;
          struct cfg80211_bss bss;
  };
  
  struct lkpi_cfg80211_get_bss_iter_lookup {
          struct wiphy *wiphy;
          struct linuxkpi_ieee80211_channel *chan;
          const uint8_t *bssid;
          const uint8_t *ssid;
          size_t ssid_len;
          enum ieee80211_bss_type bss_type;
          enum ieee80211_privacy privacy;
  
          /*
           * Something to store a copy of the result as the net80211 scan cache
           * is not refoucnted so a scan entry might go away any time.
           */
          bool match;
          struct cfg80211_bss *bss;
  };
  
  static void
  lkpi_cfg80211_get_bss_iterf(void *arg, const struct ieee80211_scan_entry *se)
  {
          struct lkpi_cfg80211_get_bss_iter_lookup *lookup;
          size_t ielen;
  
          lookup = arg;
  
          /* Do not try to find another match. */
          if (lookup->match)
                  return;
  
          /* Nothing to store result. */
          if (lookup->bss == NULL)
                  return;
  
          if (lookup->privacy != IEEE80211_PRIVACY_ANY) {
                  /* if (se->se_capinfo & IEEE80211_CAPINFO_PRIVACY) */
                  /* We have no idea what to compare to as the drivers only request ANY */
                  return;
          }
  
          if (lookup->bss_type != IEEE80211_BSS_TYPE_ANY) {
                  /* if (se->se_capinfo & (IEEE80211_CAPINFO_IBSS|IEEE80211_CAPINFO_ESS)) */
                  /* We have no idea what to compare to as the drivers only request ANY */
                  return;
          }
  
          if (lookup->chan != NULL) {
                  struct linuxkpi_ieee80211_channel *chan;
  
                  chan = linuxkpi_ieee80211_get_channel(lookup->wiphy,
                      se->se_chan->ic_freq);
                  if (chan == NULL || chan != lookup->chan)
                          return;
          }
  
          if (lookup->bssid && !IEEE80211_ADDR_EQ(lookup->bssid, se->se_bssid))
                  return;
  
          if (lookup->ssid) {
                  if (lookup->ssid_len != se->se_ssid[1] ||
                      se->se_ssid[1] == 0)
                          return;
                  if (memcmp(lookup->ssid, se->se_ssid+2, lookup->ssid_len) != 0)
                          return;
          }
  
          ielen = se->se_ies.len;
  
          lookup->bss->ies = malloc(sizeof(*lookup->bss->ies) + ielen,
              M_LKPI80211, M_NOWAIT | M_ZERO);
          if (lookup->bss->ies == NULL)
                  return;
  
          lookup->bss->ies->data = (uint8_t *)lookup->bss->ies + sizeof(*lookup->bss->ies);
          lookup->bss->ies->len = ielen;
          if (ielen)
                  memcpy(lookup->bss->ies->data, se->se_ies.data, ielen);
  
          lookup->match = true;
  }
  
  struct cfg80211_bss *
  linuxkpi_cfg80211_get_bss(struct wiphy *wiphy, struct linuxkpi_ieee80211_channel *chan,
      const uint8_t *bssid, const uint8_t *ssid, size_t ssid_len,
      enum ieee80211_bss_type bss_type, enum ieee80211_privacy privacy)
  {
          struct lkpi_cfg80211_bss *lbss;
          struct lkpi_cfg80211_get_bss_iter_lookup lookup;
          struct lkpi_hw *lhw;
          struct ieee80211vap *vap;
  
          lhw = wiphy_priv(wiphy);
  
          /* Let's hope we can alloc. */
          lbss = malloc(sizeof(*lbss), M_LKPI80211, M_NOWAIT | M_ZERO);
          if (lbss == NULL) {
                  ic_printf(lhw->ic, "%s: alloc failed.\n", __func__);
                  return (NULL);
          }
  
          lookup.wiphy = wiphy;
          lookup.chan = chan;
          lookup.bssid = bssid;
          lookup.ssid = ssid;
          lookup.ssid_len = ssid_len;
          lookup.bss_type = bss_type;
          lookup.privacy = privacy;
          lookup.match = false;
          lookup.bss = &lbss->bss;
  
          IMPROVE("Iterate over all VAPs comparing perm_addr and addresses?");
          vap = TAILQ_FIRST(&lhw->ic->ic_vaps);
          ieee80211_scan_iterate(vap, lkpi_cfg80211_get_bss_iterf, &lookup);
          if (!lookup.match) {
                  free(lbss, M_LKPI80211);
                  return (NULL);
          }
  
          refcount_init(&lbss->refcnt, 1);
          return (&lbss->bss);
  }
  
  void
  linuxkpi_cfg80211_put_bss(struct wiphy *wiphy, struct cfg80211_bss *bss)
  {
          struct lkpi_cfg80211_bss *lbss;
  
          lbss = container_of(bss, struct lkpi_cfg80211_bss, bss);
  
          /* Free everything again on refcount ... */
          if (refcount_release(&lbss->refcnt)) {
                  free(lbss->bss.ies, M_LKPI80211);
                  free(lbss, M_LKPI80211);
          }
  }
  
  void
  linuxkpi_cfg80211_bss_flush(struct wiphy *wiphy)
  {
          struct lkpi_hw *lhw;
          struct ieee80211com *ic;
          struct ieee80211vap *vap;
  
          lhw = wiphy_priv(wiphy);
          ic = lhw->ic;
  
          /*
           * If we haven't called ieee80211_ifattach() yet
           * or there is no VAP, there are no scans to flush.
           */
          if (ic == NULL ||
              (lhw->sc_flags & LKPI_MAC80211_DRV_STARTED) == 0)
                  return;
  
          /* Should only happen on the current one? Not seen it late enough. */
          IEEE80211_LOCK(ic);
          TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
                  ieee80211_scan_flush(vap);
          IEEE80211_UNLOCK(ic);
  }
  
  /* -------------------------------------------------------------------------- */
  
  MODULE_VERSION(linuxkpi_wlan, 1);
  MODULE_DEPEND(linuxkpi_wlan, linuxkpi, 1, 1, 1);
  MODULE_DEPEND(linuxkpi_wlan, wlan, 1, 1, 1);