aironet 802.11 ds driver from freebsd, isa and pci are missing

1 files changed, 1415 insertions, 0 deletions

diff --git a/sys/dev/ic/an.c b/sys/dev/ic/an.c
new file mode 100644
index 00000000000..19be0d7f75b
--- /dev/null
+++ b/sys/dev/ic/an.c
@@ -0,0 +1,1415 @@
+/*	$OpenBSD: an.c,v 1.1 2000/04/03 01:01:58 mickey Exp $	*/
+
+/*
+ * Copyright (c) 1997, 1998, 1999
+ *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Bill Paul.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
+ * 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.
+ *
+ * $FreeBSD: src/sys/dev/an/if_an.c,v 1.2 2000/01/16 06:41:49 wpaul Exp $
+ */
+
+/*
+ * Aironet 4500/4800 802.11 PCMCIA/ISA/PCI driver for FreeBSD.
+ *
+ * Written by Bill Paul <wpaul@ctr.columbia.edu>
+ * Electrical Engineering Department
+ * Columbia University, New York City
+ */
+
+/*
+ * The Aironet 4500/4800 series cards some in PCMCIA, ISA and PCI form.
+ * This driver supports all three device types (PCI devices are supported
+ * through an extra PCI shim: /sys/pci/if_an_p.c). ISA devices can be
+ * supported either using hard-coded IO port/IRQ settings or via Plug
+ * and Play. The 4500 series devices support 1Mbps and 2Mbps data rates.
+ * The 4800 devices support 1, 2, 5.5 and 11Mbps rates.
+ *
+ * Like the WaveLAN/IEEE cards, the Aironet NICs are all essentially
+ * PCMCIA devices. The ISA and PCI cards are a combination of a PCMCIA
+ * device and a PCMCIA to ISA or PCMCIA to PCI adapter card. There are
+ * a couple of important differences though:
+ *
+ * - Lucent doesn't currently offer a PCI card, however Aironet does
+ * - Lucent ISA card looks to the host like a PCMCIA controller with
+ *   a PCMCIA WaveLAN card inserted. This means that even desktop
+ *   machines need to be configured with PCMCIA support in order to
+ *   use WaveLAN/IEEE ISA cards. The Aironet cards on the other hand
+ *   actually look like normal ISA and PCI devices to the host, so
+ *   no PCMCIA controller support is needed
+ *
+ * The latter point results in a small gotcha. The Aironet PCMCIA
+ * cards can be configured for one of two operating modes depending
+ * on how the Vpp1 and Vpp2 programming voltages are set when the
+ * card is activated. In order to put the card in proper PCMCIA
+ * operation (where the CIS table is visible and the interface is
+ * programmed for PCMCIA operation), both Vpp1 and Vpp2 have to be
+ * set to 5 volts. FreeBSD by default doesn't set the Vpp voltages,
+ * which leaves the card in ISA/PCI mode, which prevents it from
+ * being activated as an PCMCIA device. Consequently, /sys/pccard/pccard.c
+ * has to be patched slightly in order to enable the Vpp voltages in
+ * order to make the Aironet PCMCIA cards work.
+ *
+ * Note that some PCMCIA controller software packages for Windows NT
+ * fail to set the voltages as well.
+ *
+ * The Aironet devices can operate in both station mode and access point
+ * mode. Typically, when programmed for station mode, the card can be set
+ * to automatically perform encapsulation/decapsulation of Ethernet II
+ * and 802.3 frames within 802.11 frames so that the host doesn't have
+ * to do it itself. This driver doesn't program the card that way: the
+ * driver handles all of the encapsulation/decapsulation itself.
+ */
+
+#ifdef INET
+#define ANCACHE			/* enable signal strength cache */
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+#include <sys/sockio.h>
+#include <sys/mbuf.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/socket.h>
+#include <sys/timeout.h>
+#ifdef ANCACHE
+#include <sys/syslog.h>
+#include <sys/sysctl.h>
+#endif
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <net/if_types.h>
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#endif
+
+#include "bpfilter.h"
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#endif
+
+#include <machine/bus.h>
+#include <machine/intr.h>
+
+#include <dev/ic/anvar.h>
+#include <dev/ic/anreg.h>
+
+#define TIMEOUT(handle,func,sc,time) timeout_add(&(handle), (time))
+#define UNTIMEOUT(func,sc,handle) timeout_del(&(handle))
+#define BPF_MTAP(if,mbuf) bpf_mtap((if)->if_bpf, (mbuf))
+#define BPFATTACH(if_bpf,if,dlt,sz) bpfattach((if_bpf), (if), (dlt), (sz))
+
+struct cfdriver an_cd = {
+	NULL, "an", DV_IFNET
+};
+
+void an_reset		__P((struct an_softc *));
+int an_ioctl		__P((struct ifnet *, u_long, caddr_t));
+int an_init_tx_ring	__P((struct an_softc *));
+void an_start		__P((struct ifnet *));
+void an_watchdog		__P((struct ifnet *));
+void an_rxeof		__P((struct an_softc *));
+void an_txeof		__P((struct an_softc *, int));
+
+void an_promisc		__P((struct an_softc *, int));
+int an_cmd		__P((struct an_softc *, int, int));
+int an_read_record	__P((struct an_softc *, struct an_ltv_gen *));
+int an_write_record	__P((struct an_softc *, struct an_ltv_gen *));
+int an_read_data		__P((struct an_softc *, int,
+					int, caddr_t, int));
+int an_write_data	__P((struct an_softc *, int,
+					int, caddr_t, int));
+int an_seek		__P((struct an_softc *, int, int, int));
+int an_alloc_nicmem	__P((struct an_softc *, int, int *));
+void an_stats_update	__P((void *));
+void an_setdef		__P((struct an_softc *, struct an_req *));
+#ifdef ANCACHE
+void an_cache_store	__P((struct an_softc *, struct ether_header *,
+					struct mbuf *, unsigned short));
+#endif
+
+int
+an_attach(sc)
+	struct an_softc *sc;
+{
+	struct ifnet	*ifp = &sc->arpcom.ac_if;
+
+	sc->an_gone = 0;
+	sc->an_associated = 0;
+
+	/* disable interrupts */
+	CSR_WRITE_2(sc, AN_INT_EN, 0);
+	CSR_WRITE_2(sc, AN_EVENT_ACK, 0xffff);
+
+	/* Reset the NIC. */
+	an_reset(sc);
+
+	/* Load factory config */
+	if (an_cmd(sc, AN_CMD_READCFG, 0)) {
+		printf("%s: failed to load config data\n", ifp->if_xname);
+		return(EIO);
+	}
+
+	/* Read the current configuration */
+	sc->an_config.an_type = AN_RID_GENCONFIG;
+	sc->an_config.an_len = sizeof(struct an_ltv_genconfig);
+	if (an_read_record(sc, (struct an_ltv_gen *)&sc->an_config)) {
+		printf("%s: read record failed\n", ifp->if_xname);
+		return(EIO);
+	}
+
+	/* Read the card capabilities */
+	sc->an_caps.an_type = AN_RID_CAPABILITIES;
+	sc->an_caps.an_len = sizeof(struct an_ltv_caps);
+	if (an_read_record(sc, (struct an_ltv_gen *)&sc->an_caps)) {
+		printf("%s: read record failed\n", ifp->if_xname);
+		return(EIO);
+	}
+
+	/* Read ssid list */
+	sc->an_ssidlist.an_type = AN_RID_SSIDLIST;
+	sc->an_ssidlist.an_len = sizeof(struct an_ltv_ssidlist);
+	if (an_read_record(sc, (struct an_ltv_gen *)&sc->an_ssidlist)) {
+		printf("%s: read record failed\n", ifp->if_xname);
+		return(EIO);
+	}
+
+	/* Read AP list */
+	sc->an_aplist.an_type = AN_RID_APLIST;
+	sc->an_aplist.an_len = sizeof(struct an_ltv_aplist);
+	if (an_read_record(sc, (struct an_ltv_gen *)&sc->an_aplist)) {
+		printf("%s: read record failed\n", ifp->if_xname);
+		return(EIO);
+	}
+
+	bcopy((char *)&sc->an_caps.an_oemaddr,
+	   (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN);
+
+	printf(": address: %6s\n", ether_sprintf(sc->arpcom.ac_enaddr));
+
+	bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
+	ifp->if_softc = sc;
+	ifp->if_mtu = ETHERMTU;
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+	ifp->if_ioctl = an_ioctl;
+	ifp->if_start = an_start;
+	ifp->if_watchdog = an_watchdog;
+	ifp->if_baudrate = 10000000;
+	ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
+
+	bzero(sc->an_config.an_nodename, sizeof(sc->an_config.an_nodename));
+	bcopy(AN_DEFAULT_NODENAME, sc->an_config.an_nodename,
+	    sizeof(AN_DEFAULT_NODENAME) - 1);
+
+	bzero(sc->an_ssidlist.an_ssid1, sizeof(sc->an_ssidlist.an_ssid1));
+	bcopy(AN_DEFAULT_NETNAME, sc->an_ssidlist.an_ssid1,
+	    sizeof(AN_DEFAULT_NETNAME) - 1);
+	sc->an_ssidlist.an_ssid1_len = strlen(AN_DEFAULT_NETNAME);
+
+	sc->an_config.an_opmode = AN_OPMODE_IBSS_ADHOC;
+
+	sc->an_tx_rate = 0;
+	bzero((char *)&sc->an_stats, sizeof(sc->an_stats));
+
+	/*
+	 * Call MI attach routines.
+	 */
+	if_attach(ifp);
+	ether_ifattach(ifp);
+	timeout_set(&sc->an_stat_ch, an_stats_update, sc);
+#if NBPFILTER > 0
+	BPFATTACH(&sc->arpcom.ac_if.if_bpf, ifp, DLT_EN10MB,
+	    sizeof(struct ether_header));
+#endif
+
+	shutdownhook_establish(an_shutdown, sc);
+
+	an_init(sc);
+
+	return(0);
+}
+
+void
+an_rxeof(sc)
+	struct an_softc	 *sc;
+{
+	struct ifnet		*ifp;
+	struct ether_header	*eh;
+#ifdef ANCACHE
+	struct an_rxframe	rx_frame;
+#endif
+	struct an_rxframe_802_3	rx_frame_802_3;
+	struct mbuf		*m;
+	int			id, error = 0;
+
+	ifp = &sc->arpcom.ac_if;
+
+	id = CSR_READ_2(sc, AN_RX_FID);
+
+	MGETHDR(m, M_DONTWAIT, MT_DATA);
+	if (m == NULL) {
+		ifp->if_ierrors++;
+		return;
+	}
+	MCLGET(m, M_DONTWAIT);
+	if (!(m->m_flags & M_EXT)) {
+		m_freem(m);
+		ifp->if_ierrors++;
+		return;
+	}
+
+	m->m_pkthdr.rcvif = ifp;
+
+	eh = mtod(m, struct ether_header *);
+
+#ifdef ANCACHE
+	/* Read NIC frame header */
+	if (an_read_data(sc, id, 0, (caddr_t)&rx_frame, sizeof(rx_frame))) {
+		ifp->if_ierrors++;
+		return;
+	}
+#endif
+	/* Read in the 802_3 frame header */
+	if (an_read_data(sc, id, 0x34, (caddr_t)&rx_frame_802_3,
+			 sizeof(rx_frame_802_3))) {
+		ifp->if_ierrors++;
+		return;
+	}
+
+	if (rx_frame_802_3.an_rx_802_3_status != 0) {
+		ifp->if_ierrors++;
+		return;
+	}
+
+	/* Check for insane frame length */
+	if (rx_frame_802_3.an_rx_802_3_payload_len > MCLBYTES) {
+		ifp->if_ierrors++;
+		return;
+	}
+
+	m->m_pkthdr.len = m->m_len =
+	    rx_frame_802_3.an_rx_802_3_payload_len + 12;
+
+
+	bcopy((char *)&rx_frame_802_3.an_rx_dst_addr,
+	    (char *)&eh->ether_dhost, ETHER_ADDR_LEN);
+	bcopy((char *)&rx_frame_802_3.an_rx_src_addr,
+	    (char *)&eh->ether_shost, ETHER_ADDR_LEN);
+
+	/* in mbuf header type is just before payload */
+	error = an_read_data(sc, id, 0x44, (caddr_t)&(eh->ether_type),
+			     rx_frame_802_3.an_rx_802_3_payload_len);
+
+	if (error) {
+		m_freem(m);
+		ifp->if_ierrors++;
+		return;
+	}
+
+	ifp->if_ipackets++;
+
+	/* Handle BPF listeners. */
+	if (ifp->if_bpf) {
+		BPF_MTAP(ifp, m);
+		if (ifp->if_flags & IFF_PROMISC &&
+		    (bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
+		    ETHER_ADDR_LEN) && (eh->ether_dhost[0] & 1) == 0)) {
+			m_freem(m);
+			return;
+		}
+	}
+
+	/* Receive packet. */
+	m_adj(m, sizeof(struct ether_header));
+#ifdef ANCACHE
+	an_cache_store(sc, eh, m, rx_frame.an_rx_signal_strength);
+#endif
+	ether_input(ifp, eh, m);
+
+	return;
+}
+
+void
+an_txeof(sc, status)
+	struct an_softc		*sc;
+	int			status;
+{
+	struct ifnet		*ifp;
+	int			id;
+
+	ifp = &sc->arpcom.ac_if;
+
+	ifp->if_timer = 0;
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	id = CSR_READ_2(sc, AN_TX_CMP_FID);
+
+	if (status & AN_EV_TX_EXC) {
+		ifp->if_oerrors++;
+	} else
+		ifp->if_opackets++;
+
+	if (id != sc->an_rdata.an_tx_ring[sc->an_rdata.an_tx_cons])
+		printf("%s: id mismatch: expected %x, got %x\n", ifp->if_xname,
+		    sc->an_rdata.an_tx_ring[sc->an_rdata.an_tx_cons], id);
+
+	sc->an_rdata.an_tx_ring[sc->an_rdata.an_tx_cons] = 0;
+	AN_INC(sc->an_rdata.an_tx_cons, AN_TX_RING_CNT);
+
+	return;
+}
+
+/*
+ * We abuse the stats updater to check the current NIC status. This
+ * is important because we don't want to allow transmissions until
+ * the NIC has synchronized to the current cell (either as the master
+ * in an ad-hoc group, or as a station connected to an access point).
+ */
+void
+an_stats_update(xsc)
+	void			*xsc;
+{
+	struct an_softc		*sc;
+	struct ifnet		*ifp;
+	int			s;
+
+	s = splimp();
+
+	sc = xsc;
+	ifp = &sc->arpcom.ac_if;
+
+	sc->an_status.an_type = AN_RID_STATUS;
+	sc->an_status.an_len = sizeof(struct an_ltv_status);
+	an_read_record(sc, (struct an_ltv_gen *)&sc->an_status);
+
+	if (sc->an_status.an_opmode & AN_STATUS_OPMODE_IN_SYNC)
+		sc->an_associated = 1;
+	else
+		sc->an_associated = 0;
+
+	/* Don't do this while we're transmitting */
+	if (!(ifp->if_flags & IFF_OACTIVE)) {
+		sc->an_stats.an_len = sizeof(struct an_ltv_stats);
+		sc->an_stats.an_type = AN_RID_32BITS_CUM;
+		an_read_record(sc, (struct an_ltv_gen *)&sc->an_stats.an_len);
+	}
+
+	splx(s);
+	TIMEOUT(sc->an_stat_ch, an_stats_update, sc, hz);
+}
+
+int
+an_intr(xsc)
+	void	*xsc;
+{
+	struct an_softc		*sc;
+	struct ifnet		*ifp;
+	u_int16_t		status;
+
+	sc = (struct an_softc*)xsc;
+
+	if (sc->an_gone)
+		return 0;
+
+	ifp = &sc->arpcom.ac_if;
+
+	if (!(ifp->if_flags & IFF_UP)) {
+		CSR_WRITE_2(sc, AN_EVENT_ACK, 0xFFFF);
+		CSR_WRITE_2(sc, AN_INT_EN, 0);
+		return 0;
+	}
+
+	/* Disable interrupts. */
+	CSR_WRITE_2(sc, AN_INT_EN, 0);
+
+	status = CSR_READ_2(sc, AN_EVENT_STAT);
+	CSR_WRITE_2(sc, AN_EVENT_ACK, ~AN_INTRS);
+
+	if (status & AN_EV_AWAKE) {
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_AWAKE);
+	}
+
+	if (status & AN_EV_LINKSTAT) {
+		if (CSR_READ_2(sc, AN_LINKSTAT) == AN_LINKSTAT_ASSOCIATED)
+			sc->an_associated = 1;
+		else
+			sc->an_associated = 0;
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_LINKSTAT);
+	}
+
+	if (status & AN_EV_RX) {
+		an_rxeof(sc);
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_RX);
+	}
+
+	if (status & AN_EV_TX) {
+		an_txeof(sc, status);
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_TX);
+	}
+
+	if (status & AN_EV_TX_EXC) {
+		an_txeof(sc, status);
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_TX_EXC);
+	}
+
+	if (status & AN_EV_ALLOC)
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_ALLOC);
+
+	/* Re-enable interrupts. */
+	CSR_WRITE_2(sc, AN_INT_EN, AN_INTRS);
+
+	if (ifp->if_snd.ifq_head != NULL)
+		an_start(ifp);
+
+	return 1;
+}
+
+int
+an_cmd(sc, cmd, val)
+	struct an_softc *sc;
+	int cmd;
+	int val;
+{
+	int i;
+
+	CSR_WRITE_2(sc, AN_PARAM0, val);
+	CSR_WRITE_2(sc, AN_PARAM1, 0);
+	CSR_WRITE_2(sc, AN_PARAM2, 0);
+	DELAY(10);
+	CSR_WRITE_2(sc, AN_COMMAND, cmd);
+	DELAY(10);
+
+	for (i = AN_TIMEOUT; i--; DELAY(10)) {
+		if (CSR_READ_2(sc, AN_EVENT_STAT) & AN_EV_CMD)
+			break;
+		else {
+			if (CSR_READ_2(sc, AN_COMMAND) == cmd) {
+				DELAY(10);
+				CSR_WRITE_2(sc, AN_COMMAND, cmd);
+			}
+		}
+	}
+/* printf("<<cmd %x,%d>>", cmd, i); */
+#if 0
+	DELAY(100);
+	for (i = AN_TIMEOUT; i--; DELAY(100)) {
+		int s = CSR_READ_2(sc, AN_STATUS);
+		CSR_READ_2(sc, AN_RESP0);
+		CSR_READ_2(sc, AN_RESP1);
+		CSR_READ_2(sc, AN_RESP2);
+		if ((s & AN_STAT_CMD_CODE) == (cmd & AN_STAT_CMD_CODE))
+			break;
+	}
+printf("<<resp %d, %x>>", i, s);
+#endif
+	/* Ack the command */
+	CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CMD);
+
+	if (CSR_READ_2(sc, AN_COMMAND) & AN_CMD_BUSY) {
+printf("busy");
+		CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CLR_STUCK_BUSY);
+	}
+
+	if (i <= 0)
+		return(ETIMEDOUT);
+
+	return(0);
+}
+
+/*
+ * This reset sequence may look a little strange, but this is the
+ * most reliable method I've found to really kick the NIC in the
+ * head and force it to reboot correctly.
+ */
+void an_reset(sc)
+	struct an_softc		*sc;
+{
+	if (sc->an_gone)
+		return;
+printf("ena ");
+	an_cmd(sc, AN_CMD_ENABLE, 0);
+printf("rst ");
+	an_cmd(sc, AN_CMD_FW_RESTART, 0);
+printf("nop ");
+	an_cmd(sc, AN_CMD_NOOP2, 0);
+
+	if (an_cmd(sc, AN_CMD_FORCE_SYNCLOSS, 0) == ETIMEDOUT)
+		printf("%s: reset failed\n", sc->sc_dev.dv_xname);
+
+	an_cmd(sc, AN_CMD_DISABLE, 0);
+
+	return;
+}
+
+/*
+ * Read an LTV record from the NIC.
+ */
+int an_read_record(sc, ltv)
+	struct an_softc		*sc;
+	struct an_ltv_gen	*ltv;
+{
+	u_int16_t		*ptr;
+	int			i, len;
+
+	if (ltv->an_len == 0 || ltv->an_type == 0)
+		return(EINVAL);
+
+	/* Tell the NIC to enter record read mode. */
+	if (an_cmd(sc, AN_CMD_ACCESS|AN_ACCESS_READ, ltv->an_type)) {
+		printf("%s: RID access failed\n", sc->sc_dev.dv_xname);
+		return(EIO);
+	}
+
+	/* Seek to the record. */
+	if (an_seek(sc, ltv->an_type, 0, AN_BAP1)) {
+		printf("%s: seek to record failed\n", sc->sc_dev.dv_xname);
+		return(EIO);
+	}
+
+	/*
+	 * Read the length and record type and make sure they
+	 * match what we expect (this verifies that we have enough
+	 * room to hold all of the returned data).
+	 */
+	len = CSR_READ_2(sc, AN_DATA1);
+	if (len > ltv->an_len) {
+		printf("%s: record length mismatch -- expected %d, got %d\n",
+		    sc->sc_dev.dv_xname, ltv->an_len, len);
+		return(ENOSPC);
+	}
+
+	ltv->an_len = len;
+
+	/* Now read the data. */
+	ptr = &ltv->an_val;
+	for (i = 0; i < (ltv->an_len - 1) >> 1; i++)
+		ptr[i] = CSR_READ_2(sc, AN_DATA1);
+
+	return(0);
+}
+
+/*
+ * Same as read, except we inject data instead of reading it.
+ */
+int an_write_record(sc, ltv)
+	struct an_softc		*sc;
+	struct an_ltv_gen	*ltv;
+{
+	u_int16_t		*ptr;
+	int			i;
+
+	if (an_cmd(sc, AN_CMD_ACCESS|AN_ACCESS_READ, ltv->an_type))
+		return(EIO);
+
+	if (an_seek(sc, ltv->an_type, 0, AN_BAP1))
+		return(EIO);
+
+	CSR_WRITE_2(sc, AN_DATA1, ltv->an_len);
+
+	ptr = &ltv->an_val;
+	for (i = 0; i < (ltv->an_len - 1) >> 1; i++)
+		CSR_WRITE_2(sc, AN_DATA1, ptr[i]);
+
+	if (an_cmd(sc, AN_CMD_ACCESS|AN_ACCESS_WRITE, ltv->an_type))
+		return(EIO);
+
+	return(0);
+}
+
+int an_seek(sc, id, off, chan)
+	struct an_softc		*sc;
+	int			id, off, chan;
+{
+	int			i;
+	int			selreg, offreg;
+
+	switch (chan) {
+	case AN_BAP0:
+		selreg = AN_SEL0;
+		offreg = AN_OFF0;
+		break;
+	case AN_BAP1:
+		selreg = AN_SEL1;
+		offreg = AN_OFF1;
+		break;
+	default:
+		printf("%s: invalid data path: %x\n",
+		    sc->sc_dev.dv_xname, chan);
+		return(EIO);
+	}
+
+	CSR_WRITE_2(sc, selreg, id);
+	CSR_WRITE_2(sc, offreg, off);
+
+	for (i = AN_TIMEOUT; i--; DELAY(10)) {
+		if (!(CSR_READ_2(sc, offreg) & (AN_OFF_BUSY|AN_OFF_ERR)))
+			break;
+	}
+
+	if (i <= 0)
+		return(ETIMEDOUT);
+
+	return(0);
+}
+
+int an_read_data(sc, id, off, buf, len)
+	struct an_softc		*sc;
+	int			id, off;
+	caddr_t			buf;
+	int			len;
+{
+	int			i;
+	u_int16_t		*ptr;
+	u_int8_t		*ptr2;
+
+	if (off != -1) {
+		if (an_seek(sc, id, off, AN_BAP1))
+			return(EIO);
+	}
+
+	ptr = (u_int16_t *)buf;
+	for (i = 0; i < len / 2; i++)
+		ptr[i] = CSR_READ_2(sc, AN_DATA1);
+	i*=2;
+	if (i<len){
+	        ptr2 = (u_int8_t *)buf;
+	        ptr2[i] = CSR_READ_1(sc, AN_DATA1);
+	}
+
+	return(0);
+}
+
+int an_write_data(sc, id, off, buf, len)
+	struct an_softc		*sc;
+	int			id, off;
+	caddr_t			buf;
+	int			len;
+{
+	int			i;
+	u_int16_t		*ptr;
+	u_int8_t		*ptr2;
+
+	if (off != -1) {
+		if (an_seek(sc, id, off, AN_BAP0))
+			return(EIO);
+	}
+
+	ptr = (u_int16_t *)buf;
+	for (i = 0; i < (len / 2); i++)
+		CSR_WRITE_2(sc, AN_DATA0, ptr[i]);
+	i*=2;
+	if (i<len){
+	        ptr2 = (u_int8_t *)buf;
+	        CSR_WRITE_1(sc, AN_DATA0, ptr2[i]);
+	}
+
+	return(0);
+}
+
+/*
+ * Allocate a region of memory inside the NIC and zero
+ * it out.
+ */
+int an_alloc_nicmem(sc, len, id)
+	struct an_softc		*sc;
+	int			len;
+	int			*id;
+{
+	int			i;
+
+	if (an_cmd(sc, AN_CMD_ALLOC_MEM, len)) {
+		printf("%s: failed to allocate %d bytes on NIC\n",
+		    sc->sc_dev.dv_xname, len);
+		return(ENOMEM);
+	}
+
+	for (i = AN_TIMEOUT; i--; DELAY(10)) {
+		if (CSR_READ_2(sc, AN_EVENT_STAT) & AN_EV_ALLOC)
+			break;
+	}
+
+	if (i <= 0)
+		return(ETIMEDOUT);
+
+	CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_ALLOC);
+	*id = CSR_READ_2(sc, AN_ALLOC_FID);
+
+	if (an_seek(sc, *id, 0, AN_BAP0))
+		return(EIO);
+
+	for (i = 0; i < len / 2; i++)
+		CSR_WRITE_2(sc, AN_DATA0, 0);
+
+	return(0);
+}
+
+void
+an_setdef(sc, areq)
+	struct an_softc		*sc;
+	struct an_req		*areq;
+{
+	struct sockaddr_dl	*sdl;
+	struct ifaddr		*ifa;
+	struct ifnet		*ifp;
+	struct an_ltv_genconfig	*cfg;
+	struct an_ltv_ssidlist	*ssid;
+	struct an_ltv_aplist	*ap;
+	struct an_ltv_gen	*sp;
+	extern struct ifaddr	**ifnet_addrs;
+
+	ifp = &sc->arpcom.ac_if;
+
+	switch (areq->an_type) {
+	case AN_RID_GENCONFIG:
+		cfg = (struct an_ltv_genconfig *)areq;
+
+		ifa = ifnet_addrs[ifp->if_index - 1];
+		sdl = (struct sockaddr_dl *)ifa->ifa_addr;
+		bcopy((char *)&cfg->an_macaddr, (char *)&sc->arpcom.ac_enaddr,
+		    ETHER_ADDR_LEN);
+		bcopy((char *)&cfg->an_macaddr, LLADDR(sdl), ETHER_ADDR_LEN);
+
+		bcopy((char *)cfg, (char *)&sc->an_config,
+			sizeof(struct an_ltv_genconfig));
+		break;
+	case AN_RID_SSIDLIST:
+		ssid = (struct an_ltv_ssidlist *)areq;
+		bcopy((char *)ssid, (char *)&sc->an_ssidlist,
+			sizeof(struct an_ltv_ssidlist));
+		break;
+	case AN_RID_APLIST:
+		ap = (struct an_ltv_aplist *)areq;
+		bcopy((char *)ap, (char *)&sc->an_aplist,
+			sizeof(struct an_ltv_aplist));
+		break;
+	case AN_RID_TX_SPEED:
+		sp = (struct an_ltv_gen *)areq;
+		sc->an_tx_rate = sp->an_val;
+		break;
+	default:
+		printf("%s: unknown RID: %x\n",
+		    sc->sc_dev.dv_xname, areq->an_type);
+		return;
+	}
+
+	/* Reinitialize the card. */
+	if (ifp->if_flags & IFF_UP)
+		an_init(sc);
+
+	return;
+}
+
+/*
+ * We can't change the NIC configuration while the MAC is enabled,
+ * so in order to turn on RX monitor mode, we have to turn the MAC
+ * off first.
+ */
+void an_promisc(sc, promisc)
+	struct an_softc		*sc;
+	int			promisc;
+{
+	/* Disable the MAC. */
+	an_cmd(sc, AN_CMD_DISABLE, 0);
+
+	/* Set RX mode. */
+	if (promisc &&
+	    !(sc->an_config.an_rxmode & AN_RXMODE_LAN_MONITOR_CURBSS)
+	    ) {
+		sc->an_rxmode = sc->an_config.an_rxmode;
+		sc->an_config.an_rxmode |=
+		    AN_RXMODE_LAN_MONITOR_CURBSS;
+	} else {
+		sc->an_config.an_rxmode = sc->an_rxmode;
+	}
+
+	/* Transfer the configuration to the NIC */
+	sc->an_config.an_len = sizeof(struct an_ltv_genconfig);
+	sc->an_config.an_type = AN_RID_GENCONFIG;
+	if (an_write_record(sc, (struct an_ltv_gen *)&sc->an_config)) {
+		printf("%s: failed to set configuration\n",
+		    sc->sc_dev.dv_xname);
+		return;
+	}
+	/* Turn the MAC back on. */
+	an_cmd(sc, AN_CMD_ENABLE, 0);
+
+	return;
+}
+
+int an_ioctl(ifp, command, data)
+	struct ifnet		*ifp;
+	u_long			command;
+	caddr_t			data;
+{
+	int			s, error = 0;
+	struct an_softc		*sc;
+	struct an_req		areq;
+	struct ifreq		*ifr;
+	struct ifaddr		*ifa = (struct ifaddr *)data;
+
+	s = splimp();
+
+	sc = ifp->if_softc;
+	ifr = (struct ifreq *)data;
+
+	if (sc->an_gone)
+		return(ENODEV);
+
+	if ((error = ether_ioctl(ifp, &sc->arpcom, command, data)) > 0) {
+		splx(s);
+		return error;
+	}
+
+	switch(command) {
+	case SIOCSIFADDR:
+		ifp->if_flags |= IFF_UP;
+		switch (ifa->ifa_addr->sa_family) {
+#ifdef INET
+		case AF_INET:
+			an_init(sc);
+			arp_ifinit(&sc->arpcom, ifa);
+			break;
+#endif
+		default:
+			an_init(sc);
+			break;
+		}
+		break;
+	case SIOCSIFFLAGS:
+		if (ifp->if_flags & IFF_UP) {
+			if (ifp->if_flags & IFF_RUNNING &&
+			    ifp->if_flags & IFF_PROMISC &&
+			    !(sc->an_if_flags & IFF_PROMISC)) {
+				an_promisc(sc, 1);
+			} else if (ifp->if_flags & IFF_RUNNING &&
+			    !(ifp->if_flags & IFF_PROMISC) &&
+			    sc->an_if_flags & IFF_PROMISC) {
+				an_promisc(sc, 0);
+			} else
+				an_init(sc);
+		} else {
+			if (ifp->if_flags & IFF_RUNNING)
+				an_stop(sc);
+		}
+		sc->an_if_flags = ifp->if_flags;
+		error = 0;
+		break;
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		/* The Aironet has no multicast filter. */
+		error = 0;
+		break;
+	case SIOCGAIRONET:
+		error = copyin(ifr->ifr_data, &areq, sizeof(areq));
+		if (error)
+			break;
+#ifdef ANCACHE
+		if (areq.an_type == AN_RID_ZERO_CACHE) {
+			sc->an_sigitems = sc->an_nextitem = 0;
+			break;
+		} else if (areq.an_type == AN_RID_READ_CACHE) {
+			char *pt = (char *)&areq.an_val;
+			bcopy((char *)&sc->an_sigitems, (char *)pt,
+			    sizeof(int));
+			pt += sizeof(int);
+			areq.an_len = sizeof(int) / 2;
+			bcopy((char *)&sc->an_sigcache, (char *)pt,
+			    sizeof(struct an_sigcache) * sc->an_sigitems);
+			areq.an_len += ((sizeof(struct an_sigcache) *
+			    sc->an_sigitems) / 2) + 1;
+		} else
+#endif
+		if (an_read_record(sc, (struct an_ltv_gen *)&areq)) {
+			error = EINVAL;
+			break;
+		}
+		error = copyout(&areq, ifr->ifr_data, sizeof(areq));
+		break;
+	case SIOCSAIRONET:
+		error = copyin(ifr->ifr_data, &areq, sizeof(areq));
+		if (error)
+			break;
+		an_setdef(sc, &areq);
+		break;
+	default:
+		error = EINVAL;
+		break;
+	}
+
+	splx(s);
+
+	return(error);
+}
+
+int
+an_init_tx_ring(sc)
+	struct an_softc		*sc;
+{
+	int			i;
+	int			id;
+
+	if (sc->an_gone)
+		return (0);
+
+	for (i = 0; i < AN_TX_RING_CNT; i++) {
+		if (an_alloc_nicmem(sc, 1518 + 0x44, &id))
+			return(ENOMEM);
+		sc->an_rdata.an_tx_fids[i] = id;
+		sc->an_rdata.an_tx_ring[i] = 0;
+	}
+
+	sc->an_rdata.an_tx_prod = 0;
+	sc->an_rdata.an_tx_cons = 0;
+
+	return(0);
+}
+
+void
+an_init(sc)
+	struct an_softc *sc;
+{
+	struct ifnet		*ifp = &sc->arpcom.ac_if;
+	int			s;
+
+	if (sc->an_gone)
+		return;
+
+	s = splimp();
+
+	if (ifp->if_flags & IFF_RUNNING)
+		an_stop(sc);
+
+	sc->an_associated = 0;
+
+	/* Allocate the TX buffers */
+	if (an_init_tx_ring(sc)) {
+		an_reset(sc);
+		if (an_init_tx_ring(sc)) {
+			printf("%s: tx buffer allocation failed\n",
+			    sc->sc_dev.dv_xname);
+			splx(s);
+			return;
+		}
+	}
+
+	/* Set our MAC address. */
+	bcopy((char *)&sc->arpcom.ac_enaddr,
+	    (char *)&sc->an_config.an_macaddr, ETHER_ADDR_LEN);
+
+	if (ifp->if_flags & IFF_BROADCAST)
+		sc->an_config.an_rxmode = AN_RXMODE_BC_ADDR;
+	else
+		sc->an_config.an_rxmode = AN_RXMODE_ADDR;
+
+	if (ifp->if_flags & IFF_MULTICAST)
+		sc->an_config.an_rxmode = AN_RXMODE_BC_MC_ADDR;
+
+	/* Initialize promisc mode. */
+	if (ifp->if_flags & IFF_PROMISC)
+		sc->an_config.an_rxmode |= AN_RXMODE_LAN_MONITOR_CURBSS;
+
+	sc->an_rxmode = sc->an_config.an_rxmode;
+
+	/* Set the ssid list */
+	sc->an_ssidlist.an_type = AN_RID_SSIDLIST;
+	sc->an_ssidlist.an_len = sizeof(struct an_ltv_ssidlist);
+	if (an_write_record(sc, (struct an_ltv_gen *)&sc->an_ssidlist)) {
+		printf("%s: failed to set ssid list\n", sc->sc_dev.dv_xname);
+		splx(s);
+		return;
+	}
+
+	/* Set the AP list */
+	sc->an_aplist.an_type = AN_RID_APLIST;
+	sc->an_aplist.an_len = sizeof(struct an_ltv_aplist);
+	if (an_write_record(sc, (struct an_ltv_gen *)&sc->an_aplist)) {
+		printf("%s: failed to set AP list\n", sc->sc_dev.dv_xname);
+		splx(s);
+		return;
+	}
+
+	/* Set the configuration in the NIC */
+	sc->an_config.an_len = sizeof(struct an_ltv_genconfig);
+	sc->an_config.an_type = AN_RID_GENCONFIG;
+	if (an_write_record(sc, (struct an_ltv_gen *)&sc->an_config)) {
+		printf("%s: failed to set configuration\n",
+		    sc->sc_dev.dv_xname);
+		splx(s);
+		return;
+	}
+
+	/* Enable the MAC */
+	if (an_cmd(sc, AN_CMD_ENABLE, 0)) {
+		printf("%s: failed to enable MAC\n", sc->sc_dev.dv_xname);
+		splx(s);
+		return;
+	}
+
+	/* enable interrupts */
+	CSR_WRITE_2(sc, AN_INT_EN, AN_INTRS);
+
+	splx(s);
+
+	ifp->if_flags |= IFF_RUNNING;
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+	TIMEOUT(sc->an_stat_ch, an_stats_update, sc, hz);
+
+	return;
+}
+
+void an_start(ifp)
+	struct ifnet		*ifp;
+{
+	struct an_softc		*sc;
+	struct mbuf		*m0 = NULL;
+	struct an_txframe_802_3	tx_frame_802_3;
+	struct ether_header	*eh;
+	int			id;
+	int			idx;
+	unsigned char           txcontrol;
+
+	sc = ifp->if_softc;
+
+	if (sc->an_gone)
+		return;
+
+	if (ifp->if_flags & IFF_OACTIVE)
+		return;
+
+	if (!sc->an_associated)
+		return;
+
+	idx = sc->an_rdata.an_tx_prod;
+	bzero((char *)&tx_frame_802_3, sizeof(tx_frame_802_3));
+
+	while(sc->an_rdata.an_tx_ring[idx] == 0) {
+		IF_DEQUEUE(&ifp->if_snd, m0);
+		if (m0 == NULL)
+			break;
+
+		id = sc->an_rdata.an_tx_fids[idx];
+		eh = mtod(m0, struct ether_header *);
+
+		bcopy((char *)&eh->ether_dhost,
+		    (char *)&tx_frame_802_3.an_tx_dst_addr, ETHER_ADDR_LEN);
+		bcopy((char *)&eh->ether_shost,
+		    (char *)&tx_frame_802_3.an_tx_src_addr, ETHER_ADDR_LEN);
+
+		tx_frame_802_3.an_tx_802_3_payload_len =
+		  m0->m_pkthdr.len - 12;  /* minus src/dest mac & type */
+
+		m_copydata(m0, sizeof(struct ether_header) - 2 ,
+		    tx_frame_802_3.an_tx_802_3_payload_len,
+		    (caddr_t)&sc->an_txbuf);
+
+		txcontrol=AN_TXCTL_8023;
+		/* write the txcontrol only */
+		an_write_data(sc, id, 0x08, (caddr_t)&txcontrol,
+			      sizeof(txcontrol));
+
+		/* 802_3 header */
+		an_write_data(sc, id, 0x34, (caddr_t)&tx_frame_802_3,
+			      sizeof(struct an_txframe_802_3));
+
+		/* in mbuf header type is just before payload */
+		an_write_data(sc, id, 0x44, (caddr_t)&sc->an_txbuf,
+			    tx_frame_802_3.an_tx_802_3_payload_len);
+
+		/*
+		 * If there's a BPF listner, bounce a copy of
+		 * this frame to him.
+		 */
+		if (ifp->if_bpf)
+			BPF_MTAP(ifp, m0);
+
+		m_freem(m0);
+		m0 = NULL;
+
+		sc->an_rdata.an_tx_ring[idx] = id;
+		if (an_cmd(sc, AN_CMD_TX, id))
+			printf("%s: xmit failed\n", sc->sc_dev.dv_xname);
+
+		AN_INC(idx, AN_TX_RING_CNT);
+	}
+
+	if (m0 != NULL)
+		ifp->if_flags |= IFF_OACTIVE;
+
+	sc->an_rdata.an_tx_prod = idx;
+
+	/*
+	 * Set a timeout in case the chip goes out to lunch.
+	 */
+	ifp->if_timer = 5;
+
+	return;
+}
+
+void an_stop(sc)
+	struct an_softc		*sc;
+{
+	struct ifnet		*ifp;
+	int			i;
+
+	if (sc->an_gone)
+		return;
+
+	ifp = &sc->arpcom.ac_if;
+
+	an_cmd(sc, AN_CMD_FORCE_SYNCLOSS, 0);
+	CSR_WRITE_2(sc, AN_INT_EN, 0);
+	an_cmd(sc, AN_CMD_DISABLE, 0);
+
+	for (i = 0; i < AN_TX_RING_CNT; i++)
+		an_cmd(sc, AN_CMD_DEALLOC_MEM, sc->an_rdata.an_tx_fids[i]);
+
+	UNTIMEOUT(an_stats_update, sc, sc->an_stat_ch);
+
+	ifp->if_flags &= ~(IFF_RUNNING|IFF_OACTIVE);
+
+	return;
+}
+
+void an_watchdog(ifp)
+	struct ifnet		*ifp;
+{
+	struct an_softc		*sc;
+
+	sc = ifp->if_softc;
+
+	if (sc->an_gone)
+		return;
+
+	printf("%s: device timeout\n", sc->sc_dev.dv_xname);
+
+	an_reset(sc);
+	an_init(sc);
+
+	ifp->if_oerrors++;
+
+	return;
+}
+
+void
+an_shutdown(self)
+	void *self;
+{
+	an_stop(self);
+}
+
+#ifdef ANCACHE
+/* Aironet signal strength cache code.
+ * store signal/noise/quality on per MAC src basis in
+ * a small fixed cache.  The cache wraps if > MAX slots
+ * used.  The cache may be zeroed out to start over.
+ * Two simple filters exist to reduce computation:
+ * 1. ip only (literally 0x800) which may be used
+ * to ignore some packets.  It defaults to ip only.
+ * it could be used to focus on broadcast, non-IP 802.11 beacons.
+ * 2. multicast/broadcast only.  This may be used to
+ * ignore unicast packets and only cache signal strength
+ * for multicast/broadcast packets (beacons); e.g., Mobile-IP
+ * beacons and not unicast traffic.
+ *
+ * The cache stores (MAC src(index), IP src (major clue), signal,
+ *	quality, noise)
+ *
+ * No apologies for storing IP src here.  It's easy and saves much
+ * trouble elsewhere.  The cache is assumed to be INET dependent,
+ * although it need not be.
+ *
+ * Note: the Aironet only has a single byte of signal strength value
+ * in the rx frame header, and it's not scaled to anything sensible.
+ * This is kind of lame, but it's all we've got.
+ */
+
+#ifdef documentation
+
+int an_sigitems;                                /* number of cached entries */
+struct an_sigcache an_sigcache[MAXANCACHE];  /*  array of cache entries */
+int an_nextitem;                                /*  index/# of entries */
+
+
+#endif
+
+/* control variables for cache filtering.  Basic idea is
+ * to reduce cost (e.g., to only Mobile-IP agent beacons
+ * which are broadcast or multicast).  Still you might
+ * want to measure signal strength anth unicast ping packets
+ * on a pt. to pt. ant. setup.
+ */
+/* set true if you want to limit cache items to broadcast/mcast
+ * only packets (not unicast).  Useful for mobile-ip beacons which
+ * are broadcast/multicast at network layer.  Default is all packets
+ * so ping/unicast anll work say anth pt. to pt. antennae setup.
+ */
+#if 0
+static int an_cache_mcastonly = 0;
+SYSCTL_INT(_machdep, OID_AUTO, an_cache_mcastonly, CTLFLAG_RW,
+	&an_cache_mcastonly, 0, "");
+
+/* set true if you want to limit cache items to IP packets only
+*/
+static int an_cache_iponly = 1;
+SYSCTL_INT(_machdep, OID_AUTO, an_cache_iponly, CTLFLAG_RW,
+	&an_cache_iponly, 0, "");
+#endif
+
+/*
+ * an_cache_store, per rx packet store signal
+ * strength in MAC (src) indexed cache.
+ */
+void
+an_cache_store (sc, eh, m, rx_quality)
+	struct an_softc *sc;
+	struct ether_header *eh;
+	struct mbuf *m;
+	unsigned short rx_quality;
+{
+	struct ip *ip = 0;
+	int i;
+	static int cache_slot = 0;	/* use this cache entry */
+	static int wrapindex = 0;       /* next "free" cache entry */
+	int saanp=0;
+
+	/* filters:
+	 * 1. ip only
+	 * 2. configurable filter to throw out unicast packets,
+	 * keep multicast only.
+	 */
+
+	if ((ntohs(eh->ether_type) == 0x800)) {
+		saanp = 1;
+	}
+
+	/* filter for ip packets only
+	*/
+	if (sc->an_cache_iponly && !saanp) {
+		return;
+	}
+
+	/* filter for broadcast/multicast only
+	 */
+	if (sc->an_cache_mcastonly && ((eh->ether_dhost[0] & 1) == 0)) {
+		return;
+	}
+
+#ifdef SIGDEBUG
+	printf("an: q value %x (MSB=0x%x, LSB=0x%x) \n",
+	    rx_quality & 0xffff, rx_quality >> 8, rx_quality & 0xff);
+#endif
+
+	/* find the ip header.  we want to store the ip_src
+	 * address.
+	 */
+	if (saanp) {
+		ip = mtod(m, struct ip *);
+	}
+
+	/* do a linear search for a matching MAC address
+	 * in the cache table
+	 * . MAC address is 6 bytes,
+	 * . var w_nextitem holds total number of entries already cached
+	 */
+	for(i = 0; i < sc->an_nextitem; i++) {
+		if (! bcmp(eh->ether_shost , sc->an_sigcache[i].macsrc,  6 )) {
+			/* Match!,
+			 * so we already have this entry,
+			 * update the data
+			 */
+			break;
+		}
+	}
+
+	/* did we find a matching mac address?
+	 * if yes, then overwrite a previously existing cache entry
+	 */
+	if (i < sc->an_nextitem )   {
+		cache_slot = i;
+	}
+	/* else, have a new address entry,so
+	 * add this new entry,
+	 * if table full, then we need to replace LRU entry
+	 */
+	else    {
+
+		/* check for space in cache table
+		 * note: an_nextitem also holds number of entries
+		 * added in the cache table
+		 */
+		if ( sc->an_nextitem < MAXANCACHE ) {
+			cache_slot = sc->an_nextitem;
+			sc->an_nextitem++;
+			sc->an_sigitems = sc->an_nextitem;
+		}
+		/* no space found, so simply wrap anth wrap index
+		 * and "zap" the next entry
+		 */
+		else {
+			if (wrapindex == MAXANCACHE) {
+				wrapindex = 0;
+			}
+			cache_slot = wrapindex++;
+		}
+	}
+
+	/* invariant: cache_slot now points at some slot
+	 * in cache.
+	 */
+	if (cache_slot < 0 || cache_slot >= MAXANCACHE) {
+		log(LOG_ERR, "an_cache_store, bad index: %d of "
+		    "[0..%d], gross cache error\n",
+		    cache_slot, MAXANCACHE);
+		return;
+	}
+
+	/*  store items in cache
+	 *  .ip source address
+	 *  .mac src
+	 *  .signal, etc.
+	 */
+	if (saanp) {
+		sc->an_sigcache[cache_slot].ipsrc = ip->ip_src.s_addr;
+	}
+	bcopy( eh->ether_shost, sc->an_sigcache[cache_slot].macsrc,  6);
+
+	sc->an_sigcache[cache_slot].signal = rx_quality;
+
+	return;
+}
+#endif