Changeset 2310

Timestamp:

05/04/07 15:45:58 (2 years ago)

Author:

mentor

Message:

Merge trunk to hal-0.9.30.13 - r2248:r2309

Files:

• branches/madwifi-hal-0.9.30.13/Makefile.inc (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/THANKS (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/ath/if_ath.c (modified) (35 diffs)
• branches/madwifi-hal-0.9.30.13/ath/if_athvar.h (modified) (3 diffs)
• branches/madwifi-hal-0.9.30.13/ath_hal/ah_os.h (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/ath_rate/amrr/amrr.c (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/ath_rate/minstrel/minstrel.c (modified) (24 diffs)
• branches/madwifi-hal-0.9.30.13/ath_rate/onoe/onoe.c (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/ath_rate/sample/sample.c (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/include/compat.h (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211.c (modified) (68 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211.h (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_crypto.c (modified) (7 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_crypto.h (modified) (8 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_crypto_ccmp.c (modified) (4 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_input.c (modified) (11 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_ioctl.h (modified) (3 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_linux.c (modified) (2 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_linux.h (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_node.c (modified) (2 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_output.c (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_power.c (modified) (2 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_rate.h (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_scan.c (modified) (10 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_var.h (modified) (4 diffs)
• branches/madwifi-hal-0.9.30.13/net80211/ieee80211_wireless.c (modified) (63 diffs)
• branches/madwifi-hal-0.9.30.13/scripts/find-madwifi-modules.sh (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/scripts/madwifi-unload.bash (modified) (1 diff)
• branches/madwifi-hal-0.9.30.13/tools/wlanconfig.c (modified) (3 diffs)

branches/madwifi-hal-0.9.30.13/Makefile.inc

@@ -147 +147 @@
-TOOLS=  $(TOP)/tools 
-
-
+
+
-INCS=   -include $(TOP)/include/compat.h -I$(TOP)/include
-

branches/madwifi-hal-0.9.30.13/THANKS

@@ -138 +138 @@
-  two donations with a total of 7 MiniPCI cards
-
+* IndraNet Technologies Ltd, New Zealand - http://www.indranet.com.nz
+  Minstrel rate control module
+
-* Linux-Consulting, USA - http://www.linux-consulting.com
-  madwifi.org domain name, DNS server maintenance

branches/madwifi-hal-0.9.30.13/ath/if_ath.c

@@ -80 +80 @@
-#include "net80211/if_athproto.h"
-#include "if_athvar.h"
+
-#include "ah_desc.h"
+/* This is defined rubbishly in ah_desc.h; it is only used in this file, so
+ * redefine it here. */
+#undef HAL_TXKEYIX_INVALID
+#define HAL_TXKEYIX_INVALID     ((ieee80211_keyix_t) -1)
+
-#include "ah_devid.h"                   /* XXX to identify chipset */
-
@@ -131 +137 @@
-static void ath_initkeytable(struct ath_softc *);
-#endif
-n
+eee80211_keyix_
-static int ath_key_delete(struct ieee80211vap *, const struct ieee80211_key *,
-        struct ieee80211_node *);
@@ -393 +399 @@
-        struct ath_softc *sc = dev->priv;
-        struct ieee80211com *ic = &sc->sc_ic;
+        struct ieee80211vap *vap;
-        struct ath_hal *ah;
-        HAL_STATUS status;
@@ -898 +905 @@
-        if (autocreatemode != -1) {
-                rtnl_lock();
-error
+vap
-                                autocreatemode, IEEE80211_CLONE_BSSID);
-                rtnl_unlock();
-error
-: %d\n
-, error
+vap == NULL
+.
+
-        }
-
@@ -1393 +1400 @@
-                        break;
-
-w
+W
-                bf->bf_status |= ATH_BUFSTATUS_DONE;
-
-e
+E
-                if (rs->rs_status)
-                        continue;
-
-p
+P
-                bus_dma_sync_single(sc->sc_bdev, bf->bf_skbaddr, 
-                                sizeof(struct ieee80211_qosframe), 
@@ -1406 +1413 @@
-                qwh = (struct ieee80211_qosframe *) skb->data;
-
-f
+F
-                if (rs->rs_keyix == HAL_RXKEYIX_INVALID ||
-                    (ni = sc->sc_keyixmap[rs->rs_keyix]) == NULL) {
@@ -1418 +1425 @@
-                         */
-#if 0
-
-
-
+
-                        DPRINTF(sc, ATH_DEBUG_UAPSD, "%s: U-APSD node (%s) has invalid keycache entry\n",
-                                __func__, ether_sprintf(qwh->i_addr2));
@@ -1441 +1446 @@
-                        /*
-                         * NB: do not require lock here since this runs at intr
-rx
+RX
-                         * (code there has lock). May want to place a macro here
-                         * (that does nothing) to make this more clear.
@@ -1465 +1470 @@
-                                        ic->ic_uapsdmaxtriggers);
-                                /* 
-r
+R
-                                 * out-of-order frames due this flush placing
-                                 * frames on backlogged regular AC queue and
@@ -2229 +2234 @@
-        struct ieee80211_phy_params *ph = (struct ieee80211_phy_params *) (skb->cb + sizeof(struct ieee80211_cb));
-        const HAL_RATE_TABLE *rt;
-
+
+
-        HAL_PKT_TYPE atype;
-        u_int flags;
@@ -2862 +2868 @@
-                        memcpy(hk->kv_mic, k->wk_txmic, sizeof(hk->kv_mic));
-                        KEYPRINTF(sc, k->wk_keyix, hk, zerobssid);
-k->wk_keyix
+ATH_KEY(k->wk_keyix)
-                                return 0;
-
-                        memcpy(hk->kv_mic, k->wk_rxmic, sizeof(hk->kv_mic));
-+
+ + 
-                        /* XXX delete tx key on failure? */
-k->wk_keyix+32
+ATH_KEY(k->wk_keyix + 32)
-                } else {
-                        /*
@@ -2880 +2886 @@
-#endif
-                        KEYPRINTF(sc, k->wk_keyix, hk, mac);
-k->wk_keyix
+ATH_KEY(k->wk_keyix)
-                }
-        } else if (k->wk_flags & IEEE80211_KEY_XR) {
@@ -2890 +2896 @@
-                        k->wk_txmic : k->wk_rxmic, sizeof(hk->kv_mic));
-                KEYPRINTF(sc, k->wk_keyix, hk, mac);
-k->wk_keyix
+ATH_KEY(k->wk_keyix)
-        }
-        return 0;
@@ -2954 +2960 @@
-        } else {
-                KEYPRINTF(sc, k->wk_keyix, &hk, mac);
-k->wk_keyix
+ATH_KEY(k->wk_keyix)
-        }
-#undef N
@@ -2963 +2969 @@
- * each key, one for decrypt/encrypt and the other for the MIC.
- */
-u_int16
+ieee80211_keyix
-key_alloc_2pair(struct ath_softc *sc)
-{
-#define N(a)    ((int)(sizeof(a)/sizeof(a[0])))
-
+
+
-
-        KASSERT(sc->sc_splitmic, ("key cache !split"));
@@ -3015 +3022 @@
- * each key, one for decrypt/encrypt and the other for the MIC.
- */
-u_int16
+ieee80211_keyix
-key_alloc_pair(struct ath_softc *sc)
-{
-#define N(a)    (sizeof(a)/sizeof(a[0]))
-
+
+
-
-        KASSERT(!sc->sc_splitmic, ("key cache split"));
@@ -3060 +3068 @@
- * Allocate a single key cache slot.
- */
-u_int16
+ieee80211_keyix
-key_alloc_single(struct ath_softc *sc)
-{
-#define N(a)    ((int)(sizeof(a)/sizeof(a[0])))
-
+
+
-
-        /* XXX try i,i+32,i+64,i+32+64 to minimize key pair conflicts */
@@ -3096 +3105 @@
- * 64 entries.
- */
-n
+eee80211_keyix_
-ath_key_alloc(struct ieee80211vap *vap, const struct ieee80211_key *k)
-{
@@ -3165 +3174 @@
-        const struct ieee80211_cipher *cip = k->wk_cipher;
-        struct ieee80211_node *ni;
-u_in
+ieee80211_keyix_
-        unsigned int rxkeyoff = 0;
-
@@ -5668 +5677 @@
-                        if (ni != NULL) {
-                                struct ath_node *an = ATH_NODE(ni);
-u_int16
+ieee80211_keyix
-
-                                ATH_RSSI_LPF(an->an_avgrssi, rs->rs_rssi);
@@ -5868 +5877 @@
-        unsigned int i, amode;
-        unsigned int flags = 0;
-
+
+
-        unsigned int pollsperrate, pos;
-        struct sk_buff *skb = NULL;
@@ -5990 +6000 @@
-                                        k = ieee80211_crypto_encap(vap->iv_bss, skb);
-                                        if (k)
-k->wk_keyix
+ATH_KEY(k->wk_keyix)
-                                }
-                        }
@@ -6515 +6525 @@
-        struct ath_hal *ah = sc->sc_ah;
-        int isprot, ismcast, istxfrag;
-keyix
-nt try0
+try0
+eee80211_keyix_t keyix
-        u_int8_t rix, txrate, ctsrate;
-        u_int32_t ivlen = 0, icvlen = 0;
-           /* NB: silence compiler */
+
-        struct ath_desc *ds = NULL;
-        struct ath_txq *txq = NULL;
@@ -6592 +6602 @@
-                                        pktlen += cip->ic_miclen;
-                }
-k->wk_keyix
+ATH_KEY(k->wk_keyix)
-
-#ifdef ATH_SUPERG_COMP
@@ -6604 +6614 @@
-                 * Use station key cache slot, if assigned.
-                 */
-
-
-
+
-        } else
-                keyix = HAL_TXKEYIX_INVALID;
@@ -6824 +6832 @@
-                if (istxfrag)
-                        /*
-*
-*
-*
-*
-*
-*
-
+ 
+ 
+ 
+ 
+ 
+ 
+ 
-                        cix = rt->info[sc->sc_protrix].controlRate;
-                else
@@ -6844 +6852 @@
-            (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL) {
-                u_int16_t dur;
-
-
-
+
+
-                if (shortPreamble)
-                        dur = rt->info[rix].spAckDuration;
@@ -7271 +7278 @@
-#ifdef ATH_SUPERG_FF
-                {
-
+
+
+
-                        unsigned int i;
-
-                        for (i = 0; i < bf->bf_numdescff; i++) {
-
-
+
-                                bus_unmap_single(sc->sc_bdev, bf->bf_skbaddrff[i],
-                                                skb->len, BUS_DMA_TODEVICE);
@@ -7282 +7290 @@
-                                        __func__, skb);
-                                ath_tx_capture(sc->sc_dev, bf, skb);
+                                skb = tskb;
-                        }
-                }
@@ -7574 +7583 @@
-        sc->sc_rxbufsize = roundup(IEEE80211_MAX_LEN, sc->sc_cachelsz);
-#endif
-
+ 
-                __func__, dev->mtu, sc->sc_cachelsz, sc->sc_rxbufsize);
-
@@ -8221 +8230 @@
-        struct ath_softc *sc = vap->iv_ic->ic_dev->priv;
-        struct ath_node *an = ATH_NODE(ni);
-u_int16_t keyinde
+ieee80211_keyix_t keyi
-
-        if (enable) {
@@ -8233 +8242 @@
-
-                /* Setup decompression mask.
-nde
+
-                 * from tx key.
-                 */
@@ -8241 +8250 @@
-                        if ((ni->ni_ucastkey.wk_flags & IEEE80211_KEY_XR) 
-                                                        == IEEE80211_KEY_XR)
-nde
+
-                        else
-nde
+
-                } else
-nde
-
-nde
-nde
+
+
+
+
-        } else {
-                if (an->an_decomp_index != INVALID_DECOMP_INDEX) {
@@ -8274 +8283 @@
-        struct ieee80211vap *vap = ni->ni_vap;
-        struct ath_softc *sc = vap->iv_ic->ic_dev->priv;
-u_int16
+ieee80211_keyix
-
-        keyix = ath_key_alloc(vap, &ni->ni_ucastkey);
@@ -8313 +8322 @@
-        struct ieee80211_key tmpkey;
-        struct ieee80211_key *rcv_key, *xmit_key;
-
+
+
-        u_int8_t null_macaddr[IEEE80211_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
-

branches/madwifi-hal-0.9.30.13/ath/if_athvar.h

@@ -314 +314 @@
-#define ATH_KEYMAX      128             /* max key cache size we handle */
-#define ATH_KEYBYTES    (ATH_KEYMAX / NBBY)     /* storage space in bytes */
+
+/*
+ * Convert from net80211 layer values to Ath layer values. Hopefully this will
+ * be optimised away when the two constants are the same.
+ */
+#define ATH_KEY(_keyix) ((_keyix == IEEE80211_KEYIX_NONE) ? HAL_TXKEYIX_INVALID : _keyix)
+
-#define ATH_MIN_FF_RATE 12000           /* min rate for ff aggregation in kbps */
-#define ATH_MIN_FF_RATE 12000           /* min rate for ff aggregation in kbps */
@@ -593 +600 @@
-        u_int sc_fftxqmin;                      /* aggregation threshold */
-        HAL_INT sc_imask;                       /* interrupt mask copy */
-       
+
-        u_int8_t sc_keymap[ATH_KEYBYTES];       /* key use bit map */
-        struct ieee80211_node *sc_keyixmap[ATH_KEYMAX];/* key ix->node map */
-        u_int8_t sc_bssidmask[IEEE80211_ADDR_LEN];
-
-       
+
-        u_int sc_ledon;                         /* pin setting for LED on */
-        u_int sc_ledidle;                       /* idle polling interval */
-       
+
-        u_int8_t sc_rxrate;                     /* current rx rate for LED */
-        u_int8_t sc_txrate;                     /* current tx rate for LED */
@@ -636 +643 @@
-        u_int sc_bmisscount;                    /* missed beacon transmits */
-        u_int32_t sc_ant_tx[8];                 /* recent tx frames/antenna */
-       
+
-        struct ath_txq sc_grpplq;               /* tx q for XR group polls */
-        struct ath_txq *sc_xrtxq;               /* tx q for XR data */

branches/madwifi-hal-0.9.30.13/ath_hal/ah_os.h

@@ -146 +146 @@
-
-#if (AH_BYTE_ORDER == AH_BIG_ENDIAN)
-
-
-
-
+
+
+
+
+
-} while (0)
-#define _OS_REG_READ(_ah, _reg)                                 \
-        ((0x4000 <= (_reg) && (_reg) < 0x5000) ?                \
-
-
+
+
+
-#else /* AH_LITTLE_ENDIAN */
-#define _OS_REG_WRITE(_ah, _reg, _val) do {                     \

branches/madwifi-hal-0.9.30.13/ath_rate/amrr/amrr.c

@@ -104 +104 @@
-ath_rate_findrate(struct ath_softc *sc, struct ath_node *an,
-        int shortPreamble, size_t frameLen,
-
+unsigned 
-{
-        struct amrr_node *amn = ATH_NODE_AMRR(an);

branches/madwifi-hal-0.9.30.13/ath_rate/minstrel/minstrel.c

@@ -117 +117 @@
-#include "minstrel.h"
-
+/* XXX: Use standard debug functions */
-#define MINSTREL_DEBUG 10
-#ifdef MINSTREL_DEBUG
@@ -129 +130 @@
-#endif
-
-, eternity
+; eternity,
-
-#include "release.h"
@@ -193 +194 @@
-        unsigned int x = 0, tt = 0;
-        unsigned int cix = rt->info[rix].controlRate;
-, cts
+ = 0, cts = 0
-        int cw = WIFI_CW_MIN;
-
@@ -206 +207 @@
-        }
-        
- g
+: G
-         * rates, and there is probably a way to get this from the
-         * HAL... */
-        switch (rt->info[rix].phy) {
-        case IEEE80211_T_OFDM:
+#if 0
-                t_slot = 9;
-                t_sifs = 16;
-                t_difs = 28;
-                /* fall through */
-
+
-        case IEEE80211_T_TURBO:
-                t_slot = 9;
@@ -222 +224 @@
-                break;
-        case IEEE80211_T_DS:
-f
+F
-        default:
-
+.
-                t_slot = 20;
-                t_difs = 50;
@@ -230 +232 @@
-        }
-
-        rts = cts = 0;
-
-        if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
-rt->info[rix].phy == IEEE80211_T_OFDM
+(rt->info[rix].phy == IEEE80211_T_OFDM)
-                if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
-                        rts = 1;
@@ -288 +288 @@
-ath_rate_node_init(struct ath_softc *sc, struct ath_node *an)
-{
-a
+A
-        ath_rate_ctl_reset(sc, &an->an_node);
-}
@@ -312 +312 @@
-ath_rate_findrate(struct ath_softc *sc, struct ath_node *an,
-        int shortPreamble, size_t frameLen,
-
+unsigned 
-{
-        struct minstrel_node *sn = ATH_NODE_MINSTREL(an);
@@ -328 +328 @@
-        mrr = sc->sc_mrretry && !(ic->ic_flags & IEEE80211_F_USEPROT) && ENABLE_MRR;
-
-!= -1
+>= 0
-                ndx = sn->static_rate_ndx;
-        } else {
-                sn->packet_count++;
-*
+ * 
-                offset = sn->random_n & 0xf;
-/
+ / 
-                        sn->sample_count++;
-                        sn->is_sampling = 1;
-(10000)
+10000
-                                sn->sample_count = 0;
-                                sn->packet_count = 0;
@@ -368 +368 @@
-                *try0 = sn->retry_adjusted_count[ndx];
-
-ndx >= 0 && ndx < sn->num_rates
+(ndx < sn->num_rates)
-                ("%s: bad ndx (%d/%d) for %s?\n",
-                 dev_info, ndx, sn->num_rates,
@@ -399 +399 @@
-        rc3 = 0;
-
-rc1 >= 0 && rc1 < sn->num_rates
+(rc1 >= 0) && (rc1 < sn->num_rates)
-                ("%s: bad rc1 (%d/%d) for %s?\n",
-                 dev_info, rc1, sn->num_rates,
-                 ether_sprintf(an->an_node.ni_macaddr)));
-
-rc2 >= 0 && rc2 < sn->num_rates
+(rc2 >= 0) && (rc2 < sn->num_rates)
-                ("%s: bad rc2 (%d/%d) for %s?\n",
-                 dev_info, rc2, sn->num_rates,
-                 ether_sprintf(an->an_node.ni_macaddr)));
-
-rc3 >= 0 && rc3 < sn->num_rates
+(rc3 >= 0) && (rc3 < sn->num_rates)
-                ("%s: bad rc3 (%d/%d) for %s?\n",
-                 dev_info, rc3, sn->num_rates,
@@ -452 +452 @@
-         * With no retransmits, it is always 0.
-         * int finalTSIdx = ads->final_ts_index; */
-~ 
+ ~
-        final_ndx = rate_to_ndx(sn, final_rate);
-        if (final_ndx >= sn->num_rates) {
@@ -463 +463 @@
-        }               
-
-tries
+'tries'
-         * send this packet, and is a sum of the #attempts at each
- 
+-
-        tries = ts->ts_shortretry + ts->ts_longretry + 1;
-
@@ -648 +648 @@
-                        dev_info, __func__, ether_sprintf(ni->ni_macaddr),
-                        vap->iv_fixed_rate);
-there are no rates yet
+There are no rates yet;
-                return;
-        }
@@ -691 +691 @@
-                sn->retry_adjusted_count[x] = 1;
-
-11
+ATH_TXMAXTRY
-                        tx_time = calc_usecs_unicast_packet(sc, 1200, sn->rates[x].rix, 0, retry_index);
-                        if (tx_time >  ath_segment_size) 
@@ -706 +706 @@
-#endif
-
-s
--
+S
+ - 
-                if (sn->rates[ndx].rate <= 72)
-                        break;
@@ -793 +793 @@
-        
-        /* Calculate statistics for each date rate in the table */
-micro_secs is the time to transmit 1200 bytes, or 9600 bits.
+'micro_secs' is the time to transmit 1200 bytes, or 9600 bits. 
-        for (i = 0; i < rs->rs_nrates; i++) {
-                micro_secs = rn->perfect_tx_time[i];
@@ -804 +804 @@
-                        rn->rs_att_hist[i]  += rn->rs_rateattempts[i];
-                        rn->rs_thisprob[i] = p;
-/
+ / 
-                        rn->rs_probability[i] = p;
-/
+ / 
-                        rn->rs_lastratesuccess[i] = rn->rs_ratesuccess[i];
-                        rn->rs_lastrateattempts[i] = rn->rs_rateattempts[i];
@@ -818 +818 @@
-                /* Sample less often below the 10% chance of success.
-                 * Sample less often above the 95% chance of success.
-rn->rs_probability is in units of 0..18000
- 
-
+'rn->rs_probability' has a scale of 0 (0%) to 18000 
+
+ 
-                        if (rn->retry_adjusted_count[i] > 2)
-                                rn->retry_adjusted_count[i] = 2;
@@ -829 +829 @@
-        }
-         
-m
+M
-         * throughput is the same for two rates, we prefer the
-         * lower rate, as this has a better chance of success. */
@@ -931 +931 @@
-                odst = ATH_NODE_MINSTREL(an);
-                /* Skip ourself */
-memcmp(vap->iv_myaddr, ni->ni_macaddr, IEEE80211_ADDR_LEN) == 0
+IEEE80211_ADDR_EQ(vap->iv_myaddr, ni->ni_macaddr)
-                        continue;
-
@@ -946 +946 @@
-                                     (x == odst->max_prob_rate) ? "P" : " ");
-
-d
-/
+u
+ / 
-                                        (odst->rates[x].rate & 0x1) != 0 ? ".5" : "  ");
-
@@ -981 +981 @@
-                return -ENOMEM;
-
-i
+I
-        pv = (struct proc_ieee80211_priv *) file->private_data;
-        memset(pv, 0, sizeof(struct proc_ieee80211_priv));
@@ -1001 +1001 @@
-        pv->max_rlen = MAX_PROC_IEEE80211_SIZE;
-
-n
+N
-        pv->rlen = ath_proc_read_nodes(vap, pv->rbuf, MAX_PROC_IEEE80211_SIZE);
-        return 0;

branches/madwifi-hal-0.9.30.13/ath_rate/onoe/onoe.c

@@ -121 +121 @@
-ath_rate_findrate(struct ath_softc *sc, struct ath_node *an,
-        int shortPreamble, size_t frameLen,
-
+unsigned 
-{
-        struct onoe_node *on = ATH_NODE_ONOE(an);

branches/madwifi-hal-0.9.30.13/ath_rate/sample/sample.c

@@ -375 +375 @@
-ath_rate_findrate(struct ath_softc *sc, struct ath_node *an,
-        int shortPreamble, size_t frameLen,
-
+unsigned 
-{
-        struct sample_node *sn = ATH_NODE_SAMPLE(an);