/* $NetBSD: an.c,v 1.11 2001/03/08 16:33:43 thorpej Exp $ */ /* * Copyright (c) 1997, 1998, 1999 * Bill Paul . 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 1.12 2000/11/13 23:04:12 wpaul Exp $ */ /* * Aironet 4500/4800 802.11 PCMCIA/ISA/PCI driver for FreeBSD. * * Written by Bill Paul * 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. */ /* * Ported to NetBSD from FreeBSD by Atsushi Onoe at the San Diego * IETF meeting. */ #include "opt_inet.h" #include "bpfilter.h" #ifdef INET #define ANCACHE /* enable signal strength cache */ #endif #include #include #include #include #include #include #include #include #include #ifdef ANCACHE #include #include #endif #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #endif #if NBPFILTER > 0 #include #endif #include #include #if !defined(lint) static const char rcsid[] = "$FreeBSD: src/sys/dev/an/if_an.c,v 1.12 2000/11/13 23:04:12 wpaul Exp $"; #endif /* These are global because we need them in sys/pci/if_an_p.c. */ static void an_reset __P((struct an_softc *)); static void an_wait __P((struct an_softc *)); static int an_ioctl __P((struct ifnet *, u_long, caddr_t)); static int an_init __P((struct ifnet *)); static void an_stop __P((struct ifnet *, int)); static int an_init_tx_ring __P((struct an_softc *)); static void an_start __P((struct ifnet *)); static void an_watchdog __P((struct ifnet *)); static void an_rxeof __P((struct an_softc *)); static void an_txeof __P((struct an_softc *, int)); static void an_promisc __P((struct an_softc *, int)); static int an_cmd __P((struct an_softc *, int, int)); static int an_read_record __P((struct an_softc *, struct an_ltv_gen *)); static int an_write_record __P((struct an_softc *, struct an_ltv_gen *)); static int an_read_data __P((struct an_softc *, int, int, caddr_t, int)); static int an_write_data __P((struct an_softc *, int, int, caddr_t, int)); static int an_seek __P((struct an_softc *, int, int, int)); static int an_alloc_nicmem __P((struct an_softc *, int, int *)); static void an_stats_update __P((void *)); static void an_setdef __P((struct an_softc *, struct an_req *)); #ifdef ANCACHE static void an_cache_store __P((struct an_softc *, struct ether_header *, struct mbuf *, unsigned short)); #endif #ifdef IFM_IEEE80211 static int an_media_change __P((struct ifnet *ifp)); static void an_media_status __P((struct ifnet *ifp, struct ifmediareq *imr)); #endif int an_attach(struct an_softc *sc) { struct ifnet *ifp = &sc->arpcom.ec_if; int i, s; #ifdef IFM_IEEE80211 int mtype; struct ifmediareq imr; #endif s = splnet(); sc->an_associated = 0; an_wait(sc); /* Load factory config */ if (an_cmd(sc, AN_CMD_READCFG, 0)) { splx(s); printf("%s: failed to load config data\n", sc->an_dev.dv_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)) { splx(s); printf("%s: read record failed\n", sc->an_dev.dv_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)) { splx(s); printf("%s: read record failed\n", sc->an_dev.dv_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)) { splx(s); printf("%s: read record failed\n", sc->an_dev.dv_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)) { splx(s); printf("%s: read record failed\n", sc->an_dev.dv_xname); return(EIO); } printf("%s: 802.11 address: %s\n", sc->an_dev.dv_xname, ether_sprintf(sc->an_caps.an_oemaddr)); ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST | IFF_NOTRAILERS | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = an_ioctl; ifp->if_start = an_start; ifp->if_init = an_init; ifp->if_stop = an_stop; ifp->if_watchdog = an_watchdog; IFQ_SET_READY(&ifp->if_snd); memcpy(ifp->if_xname, sc->an_dev.dv_xname, IFNAMSIZ); 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_INFRASTRUCTURE_STATION; sc->an_tx_rate = 0; bzero((char *)&sc->an_stats, sizeof(sc->an_stats)); /* * Call MI attach routine. */ if_attach(ifp); ether_ifattach(ifp, sc->an_caps.an_oemaddr); #ifdef IFM_IEEE80211 ifmedia_init(&sc->sc_media, 0, an_media_change, an_media_status); ifmedia_add(&sc->sc_media, IFM_MAKEWORD(IFM_IEEE80211, IFM_AUTO, 0, 0), 0, NULL); ifmedia_add(&sc->sc_media, IFM_MAKEWORD(IFM_IEEE80211, IFM_AUTO, IFM_IEEE80211_ADHOC, 0), 0, NULL); for (i = 0; i < sizeof(sc->an_caps.an_rates); i++) { switch (sc->an_caps.an_rates[i]) { case AN_RATE_1MBPS: mtype = IFM_IEEE80211_DS1; break; case AN_RATE_2MBPS: mtype = IFM_IEEE80211_DS2; break; case AN_RATE_5_5MBPS: mtype = IFM_IEEE80211_DS5; break; case AN_RATE_11MBPS: mtype = IFM_IEEE80211_DS11; break; default: continue; } ifmedia_add(&sc->sc_media, IFM_MAKEWORD(IFM_IEEE80211, mtype, 0, 0), 0, NULL); ifmedia_add(&sc->sc_media, IFM_MAKEWORD(IFM_IEEE80211, mtype, IFM_IEEE80211_ADHOC, 0), 0, NULL); } an_media_status(ifp, &imr); ifmedia_set(&sc->sc_media, imr.ifm_active); #endif callout_init(&sc->an_stat_ch); splx(s); return(0); } int an_detach(struct an_softc *sc) { struct ifnet *ifp = &sc->arpcom.ec_if; int s; s = splnet(); an_stop(ifp, 1); ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); ether_ifdetach(ifp); if_detach(ifp); splx(s); return 0; } int an_activate(struct device *self, enum devact act) { struct an_softc *sc = (struct an_softc *)self; int s, error = 0; s = splnet(); switch (act) { case DVACT_ACTIVATE: error = EOPNOTSUPP; break; case DVACT_DEACTIVATE: if_deactivate(&sc->arpcom.ec_if); break; } splx(s); return error; } void an_power(int why, void *arg) { int s; struct an_softc *sc = arg; struct ifnet *ifp = &sc->arpcom.ec_if; if (!sc->sc_enabled) return; s = splnet(); switch (why) { case PWR_SUSPEND: case PWR_STANDBY: an_stop(ifp, 0); break; case PWR_RESUME: break; case PWR_SOFTSUSPEND: case PWR_SOFTSTANDBY: case PWR_SOFTRESUME: break; } splx(s); } void an_shutdown(void *arg) { struct an_softc *sc = arg; an_stop(&sc->arpcom.ec_if, 1); return; } static 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.ec_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; /* Align the data after the ethernet header */ m->m_data = (caddr_t) ALIGN(m->m_data + sizeof(struct ether_header)) - sizeof(struct ether_header); 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++; /* Receive packet. */ #ifdef ANCACHE an_cache_store(sc, eh, m, rx_frame.an_rx_signal_strength); #endif #if NBPFILTER > 0 if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif (*ifp->if_input)(ifp, m); } static void an_txeof(sc, status) struct an_softc *sc; int status; { struct ifnet *ifp; int id; /* TX DONE enable lan monitor DJA an_enable_sniff(); */ ifp = &sc->arpcom.ec_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 0 /*XXX*/ if (id != sc->an_rdata.an_tx_ring[sc->an_rdata.an_tx_cons]) printf("%s: id mismatch: expected %x, got %x\n", sc->an_dev.dv_xname, sc->an_rdata.an_tx_ring[sc->an_rdata.an_tx_cons], id); #endif 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; sc = xsc; ifp = &sc->arpcom.ec_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) { callout_reset(&sc->an_stat_ch, hz, an_stats_update, sc); return; } 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); callout_reset(&sc->an_stat_ch, hz, an_stats_update, sc); return; } int an_intr(void *arg) { struct an_softc *sc = arg; struct ifnet *ifp; u_int16_t status; if (!sc->sc_enabled) return 0; ifp = &sc->arpcom.ec_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); if (status & AN_EV_CMD) { wakeup(sc); CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CMD); } /* Re-enable interrupts. */ CSR_WRITE_2(sc, AN_INT_EN, AN_INTRS); if (IFQ_IS_EMPTY(&ifp->if_snd) == 0) an_start(ifp); return 1; } static int an_cmd(struct an_softc *sc, int cmd, int val) { int i, stat; /* make sure that previous command completed */ if (CSR_READ_2(sc, AN_COMMAND) & AN_CMD_BUSY) { printf("%s: command busy\n", sc->an_dev.dv_xname); CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CLR_STUCK_BUSY); } CSR_WRITE_2(sc, AN_PARAM0, val); CSR_WRITE_2(sc, AN_PARAM1, 0); CSR_WRITE_2(sc, AN_PARAM2, 0); CSR_WRITE_2(sc, AN_COMMAND, cmd); for (i = 0; i < AN_TIMEOUT; i++) { if (CSR_READ_2(sc, AN_EVENT_STAT) & AN_EV_CMD) break; /* make sure the command is accepted */ if (CSR_READ_2(sc, AN_COMMAND) == cmd) CSR_WRITE_2(sc, AN_COMMAND, cmd); DELAY(10); } stat = CSR_READ_2(sc, AN_STATUS); #if 0 CSR_READ_2(sc, AN_RESP0); CSR_READ_2(sc, AN_RESP1); CSR_READ_2(sc, AN_RESP2); #endif /* clear stuck command busy if necessary */ if (CSR_READ_2(sc, AN_COMMAND) & AN_CMD_BUSY) CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CLR_STUCK_BUSY); /* Ack the command */ CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CMD); if (i == AN_TIMEOUT) return ETIMEDOUT; if (stat & AN_STAT_CMD_RESULT) return EIO; 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. */ static void an_reset(struct an_softc *sc) { if (!sc->sc_enabled) return; an_cmd(sc, AN_CMD_ENABLE, 0); an_cmd(sc, AN_CMD_FW_RESTART, 0); an_cmd(sc, AN_CMD_NOOP2, 0); if (an_cmd(sc, AN_CMD_FORCE_SYNCLOSS, 0) == ETIMEDOUT) printf("%s: reset failed\n", sc->an_dev.dv_xname); an_cmd(sc, AN_CMD_DISABLE, 0); return; } /* * Wait for firmware come up after power enabled. */ static void an_wait(struct an_softc *sc) { int i; if (!sc->sc_enabled) return; CSR_WRITE_2(sc, AN_COMMAND, AN_CMD_NOOP2); for (i = 0; i < 3*hz; i++) { if (CSR_READ_2(sc, AN_EVENT_STAT) & AN_EV_CMD) break; (void)tsleep(sc, PWAIT, "anatch", 1); } CSR_WRITE_2(sc, AN_EVENT_ACK, AN_EV_CMD); } /* * Read an LTV record from the NIC. */ static 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 0x%04x access failed\n", sc->an_dev.dv_xname, ltv->an_type); return(EIO); } /* Seek to the record. */ if (an_seek(sc, ltv->an_type, 0, AN_BAP1)) { printf("%s: RID 0x%04x seek to record failed\n", sc->an_dev.dv_xname, ltv->an_type); 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: RID 0x%04x record length mismatch -- expected %d, " "got %d\n", sc->an_dev.dv_xname, ltv->an_type, ltv->an_len, len); return(ENOSPC); } ltv->an_len = len; /* Now read the data. */ ptr = <v->an_val; for (i = 0; i < (ltv->an_len - 2) >> 1; i++) ptr[i] = CSR_READ_2(sc, AN_DATA1); return(0); } /* * Same as read, except we inject data instead of reading it. */ static 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-2); ptr = <v->an_val; for (i = 0; i < (ltv->an_len - 4) >> 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); } static 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->an_dev.dv_xname, chan); return(EIO); } CSR_WRITE_2(sc, selreg, id); CSR_WRITE_2(sc, offreg, off); for (i = 0; i < AN_TIMEOUT; i++) { if (!(CSR_READ_2(sc, offreg) & (AN_OFF_BUSY|AN_OFF_ERR))) break; DELAY(10); } if (i == AN_TIMEOUT) return(ETIMEDOUT); return(0); } static 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 (ian_dev.dv_xname, len); return(ENOMEM); } for (i = 0; i < AN_TIMEOUT; i++) { if (CSR_READ_2(sc, AN_EVENT_STAT) & AN_EV_ALLOC) break; DELAY(10); } if (i == AN_TIMEOUT) 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); } static void an_setdef(sc, areq) struct an_softc *sc; struct an_req *areq; { struct ifnet *ifp; struct an_ltv_genconfig *cfg; struct an_ltv_ssidlist *ssid; struct an_ltv_aplist *ap; struct an_ltv_gen *sp; ifp = &sc->arpcom.ec_if; switch (areq->an_type) { case AN_RID_GENCONFIG: cfg = (struct an_ltv_genconfig *)areq; bcopy((char *)&cfg->an_macaddr, (char *)&sc->an_caps.an_oemaddr, ETHER_ADDR_LEN); bcopy((char *)&cfg->an_macaddr, LLADDR(ifp->if_sadl), 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; case AN_RID_WEP_VOLATILE: memcpy(&sc->an_temp_keys, areq, sizeof(sc->an_temp_keys)); /* Disable the MAC. */ an_cmd(sc, AN_CMD_DISABLE, 0); /* Just write the Key, we don't want to save it */ an_write_record(sc, (struct an_ltv_gen *)areq); /* Turn the MAC back on. */ an_cmd(sc, AN_CMD_ENABLE, 0); break; case AN_RID_WEP_PERSISTENT: /* Disable the MAC. */ an_cmd(sc, AN_CMD_DISABLE, 0); /* Just write the Key, the card will save it in this mode */ an_write_record(sc, (struct an_ltv_gen *)areq); /* Turn the MAC back on. */ an_cmd(sc, AN_CMD_ENABLE, 0); break; default: printf("%s: unknown RID: %x\n", sc->an_dev.dv_xname, areq->an_type); return; break; } /* Reinitialize the card. */ if (ifp->if_flags & IFF_UP) an_init(ifp); 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. */ static 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; /* kills card DJA, if in sniff mode can't TX packets 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->an_dev.dv_xname); return; } /* Turn the MAC back on. */ an_cmd(sc, AN_CMD_ENABLE, 0); return; } static int an_ioctl(ifp, command, data) struct ifnet *ifp; u_long command; caddr_t data; { int i, s; int error = 0; struct an_softc *sc; struct an_req areq; struct ifreq *ifr; struct an_ltv_wepkey *akey; struct ieee80211_nwid nwid; struct ieee80211_nwkey *nwkey; struct ieee80211_power *power; sc = ifp->if_softc; ifr = (struct ifreq *)data; s = splnet(); switch(command) { case SIOCSIFFLAGS: if ((ifp->if_flags & sc->an_if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) { if (ifp->if_flags & IFF_PROMISC && !(sc->an_if_flags & IFF_PROMISC)) { an_promisc(sc, 1); break; } if (!(ifp->if_flags & IFF_PROMISC) && sc->an_if_flags & IFF_PROMISC) { an_promisc(sc, 0); break; } } error = ether_ioctl(ifp, command, data); sc->an_if_flags = ifp->if_flags; 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: if ((error = suser(curproc->p_ucred, &curproc->p_acflag))) goto out; error = copyin(ifr->ifr_data, &areq, sizeof(areq)); if (error) break; an_setdef(sc, &areq); break; case SIOCS80211NWID: error = copyin(ifr->ifr_data, &nwid, sizeof(nwid)); if (error) break; if (nwid.i_len > IEEE80211_NWID_LEN) { error = EINVAL; break; } if (sc->an_ssidlist.an_ssid1_len == nwid.i_len && memcmp(sc->an_ssidlist.an_ssid1, nwid.i_nwid, nwid.i_len) == 0) break; memset(sc->an_ssidlist.an_ssid1, 0, IEEE80211_NWID_LEN); sc->an_ssidlist.an_ssid1_len = nwid.i_len; memcpy(sc->an_ssidlist.an_ssid1, nwid.i_nwid, nwid.i_len); if (sc->sc_enabled) an_init(ifp); break; case SIOCG80211NWID: memset(&nwid, 0, sizeof(nwid)); if ((ifp->if_flags & IFF_RUNNING) && sc->an_associated) { nwid.i_len = sc->an_status.an_ssidlen; memcpy(nwid.i_nwid, sc->an_status.an_ssid, nwid.i_len); } else { nwid.i_len = sc->an_ssidlist.an_ssid1_len; memcpy(nwid.i_nwid, sc->an_ssidlist.an_ssid1, nwid.i_len); } error = copyout(&nwid, ifr->ifr_data, sizeof(nwid)); break; case SIOCS80211NWKEY: nwkey = (struct ieee80211_nwkey *)data; sc->an_config.an_authtype &= AN_AUTHTYPE_MASK; if (nwkey->i_wepon) sc->an_config.an_authtype |= (AN_AUTHTYPE_MASK + 1); akey = (struct an_ltv_wepkey *)&areq; memset(akey, 0, sizeof(struct an_ltv_wepkey)); akey->an_type = AN_RID_WEP_VOLATILE; akey->an_len = sizeof(struct an_ltv_wepkey); akey->an_key_index = 0; akey->an_mac_addr[0] = 1; /* default mac */ akey->an_key_len = nwkey->i_key[0].i_keylen; if (akey->an_key_len > sizeof(akey->an_key)) { error = EINVAL; break; } if (nwkey->i_key[0].i_keydat != NULL) { if ((error = copyin(nwkey->i_key[0].i_keydat, akey->an_key, akey->an_key_len)) != 0) break; } memcpy(&sc->an_temp_keys, akey, sizeof(struct an_ltv_wepkey)); if (sc->sc_enabled) an_init(ifp); break; case SIOCG80211NWKEY: nwkey = (struct ieee80211_nwkey *)data; nwkey->i_wepon = sc->an_config.an_authtype & ~AN_AUTHTYPE_MASK ? 1 : 0; nwkey->i_defkid = 1; if (nwkey->i_key[0].i_keydat == NULL) break; /* do not show any keys to non-root user */ if ((error = suser(curproc->p_ucred, &curproc->p_acflag)) != 0) break; akey = &sc->an_temp_keys; nwkey->i_key[0].i_keylen = akey->an_key_len; for (i = 1; i < IEEE80211_WEP_NKID; i++) nwkey->i_key[i].i_keylen = 0; error = copyout(akey->an_key, nwkey->i_key[0].i_keydat, akey->an_key_len); break; case SIOCS80211POWER: power = (struct ieee80211_power *)data; sc->an_config.an_psave_mode = power->i_enabled ? AN_PSAVE_PSP : AN_PSAVE_NONE; sc->an_config.an_listen_interval = power->i_maxsleep; if (sc->sc_enabled) an_init(ifp); break; case SIOCG80211POWER: power = (struct ieee80211_power *)data; power->i_enabled = sc->an_config.an_psave_mode != AN_PSAVE_NONE ? 1 : 0; power->i_maxsleep = sc->an_config.an_listen_interval; break; #ifdef IFM_IEEE80211 case SIOCSIFMEDIA: case SIOCGIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, command); break; #endif default: error = ether_ioctl(ifp, command, data); break; } out: splx(s); return(error); } #ifdef IFM_IEEE80211 static int an_media_change(ifp) struct ifnet *ifp; { struct an_softc *sc = ifp->if_softc; struct ifmedia_entry *ime; int error; error = 0; ime = sc->sc_media.ifm_cur; switch (IFM_SUBTYPE(ime->ifm_media)) { case IFM_AUTO: sc->an_tx_rate = 0; break; case IFM_IEEE80211_DS1: sc->an_tx_rate = AN_RATE_1MBPS; break; case IFM_IEEE80211_DS2: sc->an_tx_rate = AN_RATE_2MBPS; break; case IFM_IEEE80211_DS5: sc->an_tx_rate = AN_RATE_5_5MBPS; break; case IFM_IEEE80211_DS11: sc->an_tx_rate = AN_RATE_11MBPS; break; } if (ime->ifm_media & IFM_IEEE80211_ADHOC) sc->an_config.an_opmode = AN_OPMODE_IBSS_ADHOC; else sc->an_config.an_opmode = AN_OPMODE_INFRASTRUCTURE_STATION; /* * XXX: how to set txrate for the firmware? * There is a struct defined as an_txframe, which is used nowhere. * Perhaps we need to change the transmit mode from 802.3 to native. */ if (sc->sc_enabled) an_init(ifp); return error; } static void an_media_status(ifp, imr) struct ifnet *ifp; struct ifmediareq *imr; { struct an_softc *sc = ifp->if_softc; imr->ifm_status = IFM_AVALID; if (sc->an_associated) imr->ifm_status |= IFM_ACTIVE; imr->ifm_active = IFM_IEEE80211; switch (sc->an_tx_rate) { case 0: imr->ifm_active |= IFM_AUTO; break; case AN_RATE_1MBPS: imr->ifm_active |= IFM_IEEE80211_DS1; break; case AN_RATE_2MBPS: imr->ifm_active |= IFM_IEEE80211_DS2; break; case AN_RATE_5_5MBPS: imr->ifm_active |= IFM_IEEE80211_DS5; break; case AN_RATE_11MBPS: imr->ifm_active |= IFM_IEEE80211_DS11; break; } if ((sc->an_config.an_opmode & 0x0f) == AN_OPMODE_IBSS_ADHOC) imr->ifm_active |= IFM_IEEE80211_ADHOC; } #endif /* IFM_IEEE80211 */ static int an_init_tx_ring(sc) struct an_softc *sc; { int i; int id; if (!sc->sc_enabled) 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); } static int an_init(struct ifnet *ifp) { struct an_softc *sc = (struct an_softc *)ifp->if_softc; if (ifp->if_flags & IFF_RUNNING) an_stop(ifp, 0); else if (sc->sc_enabled) { /* re-enable to power on after resume ... */ if (sc->sc_disable) (*sc->sc_disable)(sc); sc->sc_enabled = 0; } sc->an_associated = 0; if (!sc->sc_enabled) { if (sc->sc_enable) (*sc->sc_enable)(sc); sc->sc_enabled = 1; an_wait(sc); } /* 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->an_dev.dv_xname); return ENOMEM; } } /* Set our MAC address. */ bcopy((char *)&sc->an_caps.an_oemaddr, (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. */ /* Kills card DJA can't TX packet in sniff 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->an_dev.dv_xname); return ENXIO; } /* 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->an_dev.dv_xname); return ENXIO; } /* 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->an_dev.dv_xname); return ENXIO; } /* Set the WEP Keys */ if ((sc->an_config.an_authtype & ~AN_AUTHTYPE_MASK) != 0) { sc->an_temp_keys.an_len = sizeof(struct an_ltv_wepkey); sc->an_temp_keys.an_type = AN_RID_WEP_VOLATILE; an_write_record(sc, (struct an_ltv_gen *)&sc->an_temp_keys); } /* Enable the MAC */ if (an_cmd(sc, AN_CMD_ENABLE, 0)) { printf("%s: failed to enable MAC\n", sc->an_dev.dv_xname); return ENXIO; } /* enable interrupts */ CSR_WRITE_2(sc, AN_INT_EN, AN_INTRS); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; callout_reset(&sc->an_stat_ch, hz, an_stats_update, sc); return 0; } static 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->sc_enabled) 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) { IFQ_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 NBPFILTER > 0 /* * If there's a BPF listner, bounce a copy of * this frame to him. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m0); #endif m_freem(m0); m0 = NULL; /* TX START disable lan monitor ? DJA an_disable_sniff(): */ sc->an_rdata.an_tx_ring[idx] = id; if (an_cmd(sc, AN_CMD_TX, id)) printf("%s: xmit failed\n", sc->an_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(ifp, disable) struct ifnet *ifp; int disable; { struct an_softc *sc = (struct an_softc *)ifp->if_softc; int i; callout_stop(&sc->an_stat_ch); if (!sc->sc_enabled) return; 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]); ifp->if_flags &= ~(IFF_RUNNING|IFF_OACTIVE); ifp->if_timer = 0; if (disable) { if (sc->sc_disable) (*sc->sc_disable)(sc); sc->sc_enabled = 0; } return; } static void an_watchdog(ifp) struct ifnet *ifp; { struct an_softc *sc; sc = ifp->if_softc; if (!sc->sc_enabled) return; printf("%s: device timeout\n", sc->an_dev.dv_xname); an_reset(sc); an_init(ifp); ifp->if_oerrors++; return; } #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. */ static int an_cache_mcastonly = 0; #if 0 SYSCTL_INT(_machdep, OID_AUTO, an_cache_mcastonly, CTLFLAG_RW, &an_cache_mcastonly, 0, ""); #endif /* set true if you want to limit cache items to IP packets only */ static int an_cache_iponly = 1; #if 0 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. */ static 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 ( an_cache_iponly && !saanp) { return; } /* filter for broadcast/multicast only */ if (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