diff options
Diffstat (limited to 'freebsd/sys/net80211/ieee80211.c')
| -rw-r--r-- | freebsd/sys/net80211/ieee80211.c | 1638 |
1 files changed, 1638 insertions, 0 deletions
diff --git a/freebsd/sys/net80211/ieee80211.c b/freebsd/sys/net80211/ieee80211.c new file mode 100644 index 00000000..8770d452 --- /dev/null +++ b/freebsd/sys/net80211/ieee80211.c @@ -0,0 +1,1638 @@ +#include <freebsd/machine/rtems-bsd-config.h> + +/*- + * Copyright (c) 2001 Atsushi Onoe + * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR 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. + */ + +#include <freebsd/sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * IEEE 802.11 generic handler + */ +#include <freebsd/local/opt_wlan.h> + +#include <freebsd/sys/param.h> +#include <freebsd/sys/systm.h> +#include <freebsd/sys/kernel.h> + +#include <freebsd/sys/socket.h> + +#include <freebsd/net/if.h> +#include <freebsd/net/if_dl.h> +#include <freebsd/net/if_media.h> +#include <freebsd/net/if_types.h> +#include <freebsd/net/ethernet.h> + +#include <freebsd/net80211/ieee80211_var.h> +#include <freebsd/net80211/ieee80211_regdomain.h> +#ifdef IEEE80211_SUPPORT_SUPERG +#include <freebsd/net80211/ieee80211_superg.h> +#endif +#include <freebsd/net80211/ieee80211_ratectl.h> + +#include <freebsd/net/bpf.h> + +const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = { + [IEEE80211_MODE_AUTO] = "auto", + [IEEE80211_MODE_11A] = "11a", + [IEEE80211_MODE_11B] = "11b", + [IEEE80211_MODE_11G] = "11g", + [IEEE80211_MODE_FH] = "FH", + [IEEE80211_MODE_TURBO_A] = "turboA", + [IEEE80211_MODE_TURBO_G] = "turboG", + [IEEE80211_MODE_STURBO_A] = "sturboA", + [IEEE80211_MODE_HALF] = "half", + [IEEE80211_MODE_QUARTER] = "quarter", + [IEEE80211_MODE_11NA] = "11na", + [IEEE80211_MODE_11NG] = "11ng", +}; +/* map ieee80211_opmode to the corresponding capability bit */ +const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = { + [IEEE80211_M_IBSS] = IEEE80211_C_IBSS, + [IEEE80211_M_WDS] = IEEE80211_C_WDS, + [IEEE80211_M_STA] = IEEE80211_C_STA, + [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO, + [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP, + [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR, +#ifdef IEEE80211_SUPPORT_MESH + [IEEE80211_M_MBSS] = IEEE80211_C_MBSS, +#endif +}; + +static const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] = + { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + +static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag); +static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag); +static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag); +static int ieee80211_media_setup(struct ieee80211com *ic, + struct ifmedia *media, int caps, int addsta, + ifm_change_cb_t media_change, ifm_stat_cb_t media_stat); +static void ieee80211com_media_status(struct ifnet *, struct ifmediareq *); +static int ieee80211com_media_change(struct ifnet *); +static int media_status(enum ieee80211_opmode, + const struct ieee80211_channel *); + +MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state"); + +/* + * Default supported rates for 802.11 operation (in IEEE .5Mb units). + */ +#define B(r) ((r) | IEEE80211_RATE_BASIC) +static const struct ieee80211_rateset ieee80211_rateset_11a = + { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } }; +static const struct ieee80211_rateset ieee80211_rateset_half = + { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } }; +static const struct ieee80211_rateset ieee80211_rateset_quarter = + { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } }; +static const struct ieee80211_rateset ieee80211_rateset_11b = + { 4, { B(2), B(4), B(11), B(22) } }; +/* NB: OFDM rates are handled specially based on mode */ +static const struct ieee80211_rateset ieee80211_rateset_11g = + { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } }; +#undef B + +/* + * Fill in 802.11 available channel set, mark + * all available channels as active, and pick + * a default channel if not already specified. + */ +static void +ieee80211_chan_init(struct ieee80211com *ic) +{ +#define DEFAULTRATES(m, def) do { \ + if (ic->ic_sup_rates[m].rs_nrates == 0) \ + ic->ic_sup_rates[m] = def; \ +} while (0) + struct ieee80211_channel *c; + int i; + + KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX, + ("invalid number of channels specified: %u", ic->ic_nchans)); + memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail)); + memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps)); + setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO); + for (i = 0; i < ic->ic_nchans; i++) { + c = &ic->ic_channels[i]; + KASSERT(c->ic_flags != 0, ("channel with no flags")); + /* + * Help drivers that work only with frequencies by filling + * in IEEE channel #'s if not already calculated. Note this + * mimics similar work done in ieee80211_setregdomain when + * changing regulatory state. + */ + if (c->ic_ieee == 0) + c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); + if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) + c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + + (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), + c->ic_flags); + /* default max tx power to max regulatory */ + if (c->ic_maxpower == 0) + c->ic_maxpower = 2*c->ic_maxregpower; + setbit(ic->ic_chan_avail, c->ic_ieee); + /* + * Identify mode capabilities. + */ + if (IEEE80211_IS_CHAN_A(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_11A); + if (IEEE80211_IS_CHAN_B(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_11B); + if (IEEE80211_IS_CHAN_ANYG(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_11G); + if (IEEE80211_IS_CHAN_FHSS(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_FH); + if (IEEE80211_IS_CHAN_108A(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A); + if (IEEE80211_IS_CHAN_108G(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G); + if (IEEE80211_IS_CHAN_ST(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A); + if (IEEE80211_IS_CHAN_HALF(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_HALF); + if (IEEE80211_IS_CHAN_QUARTER(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER); + if (IEEE80211_IS_CHAN_HTA(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_11NA); + if (IEEE80211_IS_CHAN_HTG(c)) + setbit(ic->ic_modecaps, IEEE80211_MODE_11NG); + } + /* initialize candidate channels to all available */ + memcpy(ic->ic_chan_active, ic->ic_chan_avail, + sizeof(ic->ic_chan_avail)); + + /* sort channel table to allow lookup optimizations */ + ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans); + + /* invalidate any previous state */ + ic->ic_bsschan = IEEE80211_CHAN_ANYC; + ic->ic_prevchan = NULL; + ic->ic_csa_newchan = NULL; + /* arbitrarily pick the first channel */ + ic->ic_curchan = &ic->ic_channels[0]; + ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); + + /* fillin well-known rate sets if driver has not specified */ + DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b); + DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g); + DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a); + DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a); + DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g); + DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a); + DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half); + DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter); + DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a); + DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g); + + /* + * Set auto mode to reset active channel state and any desired channel. + */ + (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO); +#undef DEFAULTRATES +} + +static void +null_update_mcast(struct ifnet *ifp) +{ + if_printf(ifp, "need multicast update callback\n"); +} + +static void +null_update_promisc(struct ifnet *ifp) +{ + if_printf(ifp, "need promiscuous mode update callback\n"); +} + +static int +null_transmit(struct ifnet *ifp, struct mbuf *m) +{ + m_freem(m); + ifp->if_oerrors++; + return EACCES; /* XXX EIO/EPERM? */ +} + +static int +null_output(struct ifnet *ifp, struct mbuf *m, + struct sockaddr *dst, struct route *ro) +{ + if_printf(ifp, "discard raw packet\n"); + return null_transmit(ifp, m); +} + +static void +null_input(struct ifnet *ifp, struct mbuf *m) +{ + if_printf(ifp, "if_input should not be called\n"); + m_freem(m); +} + +/* + * Attach/setup the common net80211 state. Called by + * the driver on attach to prior to creating any vap's. + */ +void +ieee80211_ifattach(struct ieee80211com *ic, + const uint8_t macaddr[IEEE80211_ADDR_LEN]) +{ + struct ifnet *ifp = ic->ic_ifp; + struct sockaddr_dl *sdl; + struct ifaddr *ifa; + + KASSERT(ifp->if_type == IFT_IEEE80211, ("if_type %d", ifp->if_type)); + + IEEE80211_LOCK_INIT(ic, ifp->if_xname); + TAILQ_INIT(&ic->ic_vaps); + + /* Create a taskqueue for all state changes */ + ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO, + taskqueue_thread_enqueue, &ic->ic_tq); + taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s taskq", + ifp->if_xname); + /* + * Fill in 802.11 available channel set, mark all + * available channels as active, and pick a default + * channel if not already specified. + */ + ieee80211_media_init(ic); + + ic->ic_update_mcast = null_update_mcast; + ic->ic_update_promisc = null_update_promisc; + + ic->ic_hash_key = arc4random(); + ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT; + ic->ic_lintval = ic->ic_bintval; + ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX; + + ieee80211_crypto_attach(ic); + ieee80211_node_attach(ic); + ieee80211_power_attach(ic); + ieee80211_proto_attach(ic); +#ifdef IEEE80211_SUPPORT_SUPERG + ieee80211_superg_attach(ic); +#endif + ieee80211_ht_attach(ic); + ieee80211_scan_attach(ic); + ieee80211_regdomain_attach(ic); + ieee80211_dfs_attach(ic); + + ieee80211_sysctl_attach(ic); + + ifp->if_addrlen = IEEE80211_ADDR_LEN; + ifp->if_hdrlen = 0; + if_attach(ifp); + ifp->if_mtu = IEEE80211_MTU_MAX; + ifp->if_broadcastaddr = ieee80211broadcastaddr; + ifp->if_output = null_output; + ifp->if_input = null_input; /* just in case */ + ifp->if_resolvemulti = NULL; /* NB: callers check */ + + ifa = ifaddr_byindex(ifp->if_index); + KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); + sdl = (struct sockaddr_dl *)ifa->ifa_addr; + sdl->sdl_type = IFT_ETHER; /* XXX IFT_IEEE80211? */ + sdl->sdl_alen = IEEE80211_ADDR_LEN; + IEEE80211_ADDR_COPY(LLADDR(sdl), macaddr); + ifa_free(ifa); +} + +/* + * Detach net80211 state on device detach. Tear down + * all vap's and reclaim all common state prior to the + * device state going away. Note we may call back into + * driver; it must be prepared for this. + */ +void +ieee80211_ifdetach(struct ieee80211com *ic) +{ + struct ifnet *ifp = ic->ic_ifp; + struct ieee80211vap *vap; + + if_detach(ifp); + + while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) + ieee80211_vap_destroy(vap); + ieee80211_waitfor_parent(ic); + + ieee80211_sysctl_detach(ic); + ieee80211_dfs_detach(ic); + ieee80211_regdomain_detach(ic); + ieee80211_scan_detach(ic); +#ifdef IEEE80211_SUPPORT_SUPERG + ieee80211_superg_detach(ic); +#endif + ieee80211_ht_detach(ic); + /* NB: must be called before ieee80211_node_detach */ + ieee80211_proto_detach(ic); + ieee80211_crypto_detach(ic); + ieee80211_power_detach(ic); + ieee80211_node_detach(ic); + + ifmedia_removeall(&ic->ic_media); + taskqueue_free(ic->ic_tq); + IEEE80211_LOCK_DESTROY(ic); +} + +/* + * Default reset method for use with the ioctl support. This + * method is invoked after any state change in the 802.11 + * layer that should be propagated to the hardware but not + * require re-initialization of the 802.11 state machine (e.g + * rescanning for an ap). We always return ENETRESET which + * should cause the driver to re-initialize the device. Drivers + * can override this method to implement more optimized support. + */ +static int +default_reset(struct ieee80211vap *vap, u_long cmd) +{ + return ENETRESET; +} + +/* + * Prepare a vap for use. Drivers use this call to + * setup net80211 state in new vap's prior attaching + * them with ieee80211_vap_attach (below). + */ +int +ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap, + const char name[IFNAMSIZ], int unit, int opmode, int flags, + const uint8_t bssid[IEEE80211_ADDR_LEN], + const uint8_t macaddr[IEEE80211_ADDR_LEN]) +{ + struct ifnet *ifp; + + ifp = if_alloc(IFT_ETHER); + if (ifp == NULL) { + if_printf(ic->ic_ifp, "%s: unable to allocate ifnet\n", + __func__); + return ENOMEM; + } + if_initname(ifp, name, unit); + ifp->if_softc = vap; /* back pointer */ + ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; + ifp->if_start = ieee80211_start; + ifp->if_ioctl = ieee80211_ioctl; + ifp->if_init = ieee80211_init; + /* NB: input+output filled in by ether_ifattach */ + IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); + ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; + IFQ_SET_READY(&ifp->if_snd); + + vap->iv_ifp = ifp; + vap->iv_ic = ic; + vap->iv_flags = ic->ic_flags; /* propagate common flags */ + vap->iv_flags_ext = ic->ic_flags_ext; + vap->iv_flags_ven = ic->ic_flags_ven; + vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE; + vap->iv_htcaps = ic->ic_htcaps; + vap->iv_opmode = opmode; + vap->iv_caps |= ieee80211_opcap[opmode]; + switch (opmode) { + case IEEE80211_M_WDS: + /* + * WDS links must specify the bssid of the far end. + * For legacy operation this is a static relationship. + * For non-legacy operation the station must associate + * and be authorized to pass traffic. Plumbing the + * vap to the proper node happens when the vap + * transitions to RUN state. + */ + IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid); + vap->iv_flags |= IEEE80211_F_DESBSSID; + if (flags & IEEE80211_CLONE_WDSLEGACY) + vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY; + break; +#ifdef IEEE80211_SUPPORT_TDMA + case IEEE80211_M_AHDEMO: + if (flags & IEEE80211_CLONE_TDMA) { + /* NB: checked before clone operation allowed */ + KASSERT(ic->ic_caps & IEEE80211_C_TDMA, + ("not TDMA capable, ic_caps 0x%x", ic->ic_caps)); + /* + * Propagate TDMA capability to mark vap; this + * cannot be removed and is used to distinguish + * regular ahdemo operation from ahdemo+tdma. + */ + vap->iv_caps |= IEEE80211_C_TDMA; + } + break; +#endif + } + /* auto-enable s/w beacon miss support */ + if (flags & IEEE80211_CLONE_NOBEACONS) + vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS; + /* auto-generated or user supplied MAC address */ + if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR)) + vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC; + /* + * Enable various functionality by default if we're + * capable; the driver can override us if it knows better. + */ + if (vap->iv_caps & IEEE80211_C_WME) + vap->iv_flags |= IEEE80211_F_WME; + if (vap->iv_caps & IEEE80211_C_BURST) + vap->iv_flags |= IEEE80211_F_BURST; + /* NB: bg scanning only makes sense for station mode right now */ + if (vap->iv_opmode == IEEE80211_M_STA && + (vap->iv_caps & IEEE80211_C_BGSCAN)) + vap->iv_flags |= IEEE80211_F_BGSCAN; + vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */ + /* NB: DFS support only makes sense for ap mode right now */ + if (vap->iv_opmode == IEEE80211_M_HOSTAP && + (vap->iv_caps & IEEE80211_C_DFS)) + vap->iv_flags_ext |= IEEE80211_FEXT_DFS; + + vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */ + vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT; + vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT; + /* + * Install a default reset method for the ioctl support; + * the driver can override this. + */ + vap->iv_reset = default_reset; + + IEEE80211_ADDR_COPY(vap->iv_myaddr, macaddr); + + ieee80211_sysctl_vattach(vap); + ieee80211_crypto_vattach(vap); + ieee80211_node_vattach(vap); + ieee80211_power_vattach(vap); + ieee80211_proto_vattach(vap); +#ifdef IEEE80211_SUPPORT_SUPERG + ieee80211_superg_vattach(vap); +#endif + ieee80211_ht_vattach(vap); + ieee80211_scan_vattach(vap); + ieee80211_regdomain_vattach(vap); + ieee80211_radiotap_vattach(vap); + ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE); + + return 0; +} + +/* + * Activate a vap. State should have been prepared with a + * call to ieee80211_vap_setup and by the driver. On return + * from this call the vap is ready for use. + */ +int +ieee80211_vap_attach(struct ieee80211vap *vap, + ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) +{ + struct ifnet *ifp = vap->iv_ifp; + struct ieee80211com *ic = vap->iv_ic; + struct ifmediareq imr; + int maxrate; + + IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, + "%s: %s parent %s flags 0x%x flags_ext 0x%x\n", + __func__, ieee80211_opmode_name[vap->iv_opmode], + ic->ic_ifp->if_xname, vap->iv_flags, vap->iv_flags_ext); + + /* + * Do late attach work that cannot happen until after + * the driver has had a chance to override defaults. + */ + ieee80211_node_latevattach(vap); + ieee80211_power_latevattach(vap); + + maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps, + vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat); + ieee80211_media_status(ifp, &imr); + /* NB: strip explicit mode; we're actually in autoselect */ + ifmedia_set(&vap->iv_media, + imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO)); + if (maxrate) + ifp->if_baudrate = IF_Mbps(maxrate); + + ether_ifattach(ifp, vap->iv_myaddr); + if (vap->iv_opmode == IEEE80211_M_MONITOR) { + /* NB: disallow transmit */ + ifp->if_transmit = null_transmit; + ifp->if_output = null_output; + } else { + /* hook output method setup by ether_ifattach */ + vap->iv_output = ifp->if_output; + ifp->if_output = ieee80211_output; + } + /* NB: if_mtu set by ether_ifattach to ETHERMTU */ + + IEEE80211_LOCK(ic); + TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next); + ieee80211_syncflag_locked(ic, IEEE80211_F_WME); +#ifdef IEEE80211_SUPPORT_SUPERG + ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); +#endif + ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); + ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); + ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); + ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); + ieee80211_syncifflag_locked(ic, IFF_PROMISC); + ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); + IEEE80211_UNLOCK(ic); + + return 1; +} + +/* + * Tear down vap state and reclaim the ifnet. + * The driver is assumed to have prepared for + * this; e.g. by turning off interrupts for the + * underlying device. + */ +void +ieee80211_vap_detach(struct ieee80211vap *vap) +{ + struct ieee80211com *ic = vap->iv_ic; + struct ifnet *ifp = vap->iv_ifp; + + IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n", + __func__, ieee80211_opmode_name[vap->iv_opmode], + ic->ic_ifp->if_xname); + + /* NB: bpfdetach is called by ether_ifdetach and claims all taps */ + ether_ifdetach(ifp); + + ieee80211_stop(vap); + + /* + * Flush any deferred vap tasks. + */ + ieee80211_draintask(ic, &vap->iv_nstate_task); + ieee80211_draintask(ic, &vap->iv_swbmiss_task); + + /* XXX band-aid until ifnet handles this for us */ + taskqueue_drain(taskqueue_swi, &ifp->if_linktask); + + IEEE80211_LOCK(ic); + KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running")); + TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next); + ieee80211_syncflag_locked(ic, IEEE80211_F_WME); +#ifdef IEEE80211_SUPPORT_SUPERG + ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP); +#endif + ieee80211_syncflag_locked(ic, IEEE80211_F_PCF); + ieee80211_syncflag_locked(ic, IEEE80211_F_BURST); + ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT); + ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40); + /* NB: this handles the bpfdetach done below */ + ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF); + ieee80211_syncifflag_locked(ic, IFF_PROMISC); + ieee80211_syncifflag_locked(ic, IFF_ALLMULTI); + IEEE80211_UNLOCK(ic); + + ifmedia_removeall(&vap->iv_media); + + ieee80211_radiotap_vdetach(vap); + ieee80211_regdomain_vdetach(vap); + ieee80211_scan_vdetach(vap); +#ifdef IEEE80211_SUPPORT_SUPERG + ieee80211_superg_vdetach(vap); +#endif + ieee80211_ht_vdetach(vap); + /* NB: must be before ieee80211_node_vdetach */ + ieee80211_proto_vdetach(vap); + ieee80211_crypto_vdetach(vap); + ieee80211_power_vdetach(vap); + ieee80211_node_vdetach(vap); + ieee80211_sysctl_vdetach(vap); + + if_free(ifp); +} + +/* + * Synchronize flag bit state in the parent ifnet structure + * according to the state of all vap ifnet's. This is used, + * for example, to handle IFF_PROMISC and IFF_ALLMULTI. + */ +void +ieee80211_syncifflag_locked(struct ieee80211com *ic, int flag) +{ + struct ifnet *ifp = ic->ic_ifp; + struct ieee80211vap *vap; + int bit, oflags; + + IEEE80211_LOCK_ASSERT(ic); + + bit = 0; + TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) + if (vap->iv_ifp->if_flags & flag) { + /* + * XXX the bridge sets PROMISC but we don't want to + * enable it on the device, discard here so all the + * drivers don't need to special-case it + */ + if (flag == IFF_PROMISC && + !(vap->iv_opmode == IEEE80211_M_MONITOR || + (vap->iv_opmode == IEEE80211_M_AHDEMO && + (vap->iv_caps & IEEE80211_C_TDMA) == 0))) + continue; + bit = 1; + break; + } + oflags = ifp->if_flags; + if (bit) + ifp->if_flags |= flag; + else + ifp->if_flags &= ~flag; + if ((ifp->if_flags ^ oflags) & flag) { + /* XXX should we return 1/0 and let caller do this? */ + if (ifp->if_drv_flags & IFF_DRV_RUNNING) { + if (flag == IFF_PROMISC) + ieee80211_runtask(ic, &ic->ic_promisc_task); + else if (flag == IFF_ALLMULTI) + ieee80211_runtask(ic, &ic->ic_mcast_task); + } + } +} + +/* + * Synchronize flag bit state in the com structure + * according to the state of all vap's. This is used, + * for example, to handle state changes via ioctls. + */ +static void +ieee80211_syncflag_locked(struct ieee80211com *ic, int flag) +{ + struct ieee80211vap *vap; + int bit; + + IEEE80211_LOCK_ASSERT(ic); + + bit = 0; + TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) + if (vap->iv_flags & flag) { + bit = 1; + break; + } + if (bit) + ic->ic_flags |= flag; + else + ic->ic_flags &= ~flag; +} + +void +ieee80211_syncflag(struct ieee80211vap *vap, int flag) +{ + struct ieee80211com *ic = vap->iv_ic; + + IEEE80211_LOCK(ic); + if (flag < 0) { + flag = -flag; + vap->iv_flags &= ~flag; + } else + vap->iv_flags |= flag; + ieee80211_syncflag_locked(ic, flag); + IEEE80211_UNLOCK(ic); +} + +/* + * Synchronize flags_ht bit state in the com structure + * according to the state of all vap's. This is used, + * for example, to handle state changes via ioctls. + */ +static void +ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag) +{ + struct ieee80211vap *vap; + int bit; + + IEEE80211_LOCK_ASSERT(ic); + + bit = 0; + TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) + if (vap->iv_flags_ht & flag) { + bit = 1; + break; + } + if (bit) + ic->ic_flags_ht |= flag; + else + ic->ic_flags_ht &= ~flag; +} + +void +ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag) +{ + struct ieee80211com *ic = vap->iv_ic; + + IEEE80211_LOCK(ic); + if (flag < 0) { + flag = -flag; + vap->iv_flags_ht &= ~flag; + } else + vap->iv_flags_ht |= flag; + ieee80211_syncflag_ht_locked(ic, flag); + IEEE80211_UNLOCK(ic); +} + +/* + * Synchronize flags_ext bit state in the com structure + * according to the state of all vap's. This is used, + * for example, to handle state changes via ioctls. + */ +static void +ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag) +{ + struct ieee80211vap *vap; + int bit; + + IEEE80211_LOCK_ASSERT(ic); + + bit = 0; + TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) + if (vap->iv_flags_ext & flag) { + bit = 1; + break; + } + if (bit) + ic->ic_flags_ext |= flag; + else + ic->ic_flags_ext &= ~flag; +} + +void +ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag) +{ + struct ieee80211com *ic = vap->iv_ic; + + IEEE80211_LOCK(ic); + if (flag < 0) { + flag = -flag; + vap->iv_flags_ext &= ~flag; + } else + vap->iv_flags_ext |= flag; + ieee80211_syncflag_ext_locked(ic, flag); + IEEE80211_UNLOCK(ic); +} + +static __inline int +mapgsm(u_int freq, u_int flags) +{ + freq *= 10; + if (flags & IEEE80211_CHAN_QUARTER) + freq += 5; + else if (flags & IEEE80211_CHAN_HALF) + freq += 10; + else + freq += 20; + /* NB: there is no 907/20 wide but leave room */ + return (freq - 906*10) / 5; +} + +static __inline int +mappsb(u_int freq, u_int flags) +{ + return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5; +} + +/* + * Convert MHz frequency to IEEE channel number. + */ +int +ieee80211_mhz2ieee(u_int freq, u_int flags) +{ +#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990) + if (flags & IEEE80211_CHAN_GSM) + return mapgsm(freq, flags); + if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ + if (freq == 2484) + return 14; + if (freq < 2484) + return ((int) freq - 2407) / 5; + else + return 15 + ((freq - 2512) / 20); + } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */ + if (freq <= 5000) { + /* XXX check regdomain? */ + if (IS_FREQ_IN_PSB(freq)) + return mappsb(freq, flags); + return (freq - 4000) / 5; + } else + return (freq - 5000) / 5; + } else { /* either, guess */ + if (freq == 2484) + return 14; + if (freq < 2484) { + if (907 <= freq && freq <= 922) + return mapgsm(freq, flags); + return ((int) freq - 2407) / 5; + } + if (freq < 5000) { + if (IS_FREQ_IN_PSB(freq)) + return mappsb(freq, flags); + else if (freq > 4900) + return (freq - 4000) / 5; + else + return 15 + ((freq - 2512) / 20); + } + return (freq - 5000) / 5; + } +#undef IS_FREQ_IN_PSB +} + +/* + * Convert channel to IEEE channel number. + */ +int +ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c) +{ + if (c == NULL) { + if_printf(ic->ic_ifp, "invalid channel (NULL)\n"); + return 0; /* XXX */ + } + return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee); +} + +/* + * Convert IEEE channel number to MHz frequency. + */ +u_int +ieee80211_ieee2mhz(u_int chan, u_int flags) +{ + if (flags & IEEE80211_CHAN_GSM) + return 907 + 5 * (chan / 10); + if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */ + if (chan == 14) + return 2484; + if (chan < 14) + return 2407 + chan*5; + else + return 2512 + ((chan-15)*20); + } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */ + if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) { + chan -= 37; + return 4940 + chan*5 + (chan % 5 ? 2 : 0); + } + return 5000 + (chan*5); + } else { /* either, guess */ + /* XXX can't distinguish PSB+GSM channels */ + if (chan == 14) + return 2484; + if (chan < 14) /* 0-13 */ + return 2407 + chan*5; + if (chan < 27) /* 15-26 */ + return 2512 + ((chan-15)*20); + return 5000 + (chan*5); + } +} + +/* + * Locate a channel given a frequency+flags. We cache + * the previous lookup to optimize switching between two + * channels--as happens with dynamic turbo. + */ +struct ieee80211_channel * +ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags) +{ + struct ieee80211_channel *c; + int i; + + flags &= IEEE80211_CHAN_ALLTURBO; + c = ic->ic_prevchan; + if (c != NULL && c->ic_freq == freq && + (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) + return c; + /* brute force search */ + for (i = 0; i < ic->ic_nchans; i++) { + c = &ic->ic_channels[i]; + if (c->ic_freq == freq && + (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) + return c; + } + return NULL; +} + +/* + * Locate a channel given a channel number+flags. We cache + * the previous lookup to optimize switching between two + * channels--as happens with dynamic turbo. + */ +struct ieee80211_channel * +ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags) +{ + struct ieee80211_channel *c; + int i; + + flags &= IEEE80211_CHAN_ALLTURBO; + c = ic->ic_prevchan; + if (c != NULL && c->ic_ieee == ieee && + (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) + return c; + /* brute force search */ + for (i = 0; i < ic->ic_nchans; i++) { + c = &ic->ic_channels[i]; + if (c->ic_ieee == ieee && + (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags) + return c; + } + return NULL; +} + +static void +addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword) +{ +#define ADD(_ic, _s, _o) \ + ifmedia_add(media, \ + IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL) + static const u_int mopts[IEEE80211_MODE_MAX] = { + [IEEE80211_MODE_AUTO] = IFM_AUTO, + [IEEE80211_MODE_11A] = IFM_IEEE80211_11A, + [IEEE80211_MODE_11B] = IFM_IEEE80211_11B, + [IEEE80211_MODE_11G] = IFM_IEEE80211_11G, + [IEEE80211_MODE_FH] = IFM_IEEE80211_FH, + [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, + [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO, + [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO, + [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */ + [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */ + [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA, + [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG, + }; + u_int mopt; + + mopt = mopts[mode]; + if (addsta) + ADD(ic, mword, mopt); /* STA mode has no cap */ + if (caps & IEEE80211_C_IBSS) + ADD(media, mword, mopt | IFM_IEEE80211_ADHOC); + if (caps & IEEE80211_C_HOSTAP) + ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP); + if (caps & IEEE80211_C_AHDEMO) + ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0); + if (caps & IEEE80211_C_MONITOR) + ADD(media, mword, mopt | IFM_IEEE80211_MONITOR); + if (caps & IEEE80211_C_WDS) + ADD(media, mword, mopt | IFM_IEEE80211_WDS); + if (caps & IEEE80211_C_MBSS) + ADD(media, mword, mopt | IFM_IEEE80211_MBSS); +#undef ADD +} + +/* + * Setup the media data structures according to the channel and + * rate tables. + */ +static int +ieee80211_media_setup(struct ieee80211com *ic, + struct ifmedia *media, int caps, int addsta, + ifm_change_cb_t media_change, ifm_stat_cb_t media_stat) +{ + int i, j, mode, rate, maxrate, mword, r; + const struct ieee80211_rateset *rs; + struct ieee80211_rateset allrates; + + /* + * Fill in media characteristics. + */ + ifmedia_init(media, 0, media_change, media_stat); + maxrate = 0; + /* + * Add media for legacy operating modes. + */ + memset(&allrates, 0, sizeof(allrates)); + for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) { + if (isclr(ic->ic_modecaps, mode)) + continue; + addmedia(media, caps, addsta, mode, IFM_AUTO); + if (mode == IEEE80211_MODE_AUTO) + continue; + rs = &ic->ic_sup_rates[mode]; + for (i = 0; i < rs->rs_nrates; i++) { + rate = rs->rs_rates[i]; + mword = ieee80211_rate2media(ic, rate, mode); + if (mword == 0) + continue; + addmedia(media, caps, addsta, mode, mword); + /* + * Add legacy rate to the collection of all rates. + */ + r = rate & IEEE80211_RATE_VAL; + for (j = 0; j < allrates.rs_nrates; j++) + if (allrates.rs_rates[j] == r) + break; + if (j == allrates.rs_nrates) { + /* unique, add to the set */ + allrates.rs_rates[j] = r; + allrates.rs_nrates++; + } + rate = (rate & IEEE80211_RATE_VAL) / 2; + if (rate > maxrate) + maxrate = rate; + } + } + for (i = 0; i < allrates.rs_nrates; i++) { + mword = ieee80211_rate2media(ic, allrates.rs_rates[i], + IEEE80211_MODE_AUTO); + if (mword == 0) + continue; + /* NB: remove media options from mword */ + addmedia(media, caps, addsta, + IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword)); + } + /* + * Add HT/11n media. Note that we do not have enough + * bits in the media subtype to express the MCS so we + * use a "placeholder" media subtype and any fixed MCS + * must be specified with a different mechanism. + */ + for (; mode <= IEEE80211_MODE_11NG; mode++) { + if (isclr(ic->ic_modecaps, mode)) + continue; + addmedia(media, caps, addsta, mode, IFM_AUTO); + addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS); + } + if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || + isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) { + addmedia(media, caps, addsta, + IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS); + /* XXX could walk htrates */ + /* XXX known array size */ + if (ieee80211_htrates[15].ht40_rate_400ns > maxrate) + maxrate = ieee80211_htrates[15].ht40_rate_400ns; + } + return maxrate; +} + +void +ieee80211_media_init(struct ieee80211com *ic) +{ + struct ifnet *ifp = ic->ic_ifp; + int maxrate; + + /* NB: this works because the structure is initialized to zero */ + if (!LIST_EMPTY(&ic->ic_media.ifm_list)) { + /* + * We are re-initializing the channel list; clear + * the existing media state as the media routines + * don't suppress duplicates. + */ + ifmedia_removeall(&ic->ic_media); + } + ieee80211_chan_init(ic); + + /* + * Recalculate media settings in case new channel list changes + * the set of available modes. + */ + maxrate = ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps, 1, + ieee80211com_media_change, ieee80211com_media_status); + /* NB: strip explicit mode; we're actually in autoselect */ + ifmedia_set(&ic->ic_media, + media_status(ic->ic_opmode, ic->ic_curchan) &~ + (IFM_MMASK | IFM_IEEE80211_TURBO)); + if (maxrate) + ifp->if_baudrate = IF_Mbps(maxrate); + + /* XXX need to propagate new media settings to vap's */ +} + +/* XXX inline or eliminate? */ +const struct ieee80211_rateset * +ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c) +{ + /* XXX does this work for 11ng basic rates? */ + return &ic->ic_sup_rates[ieee80211_chan2mode(c)]; +} + +void +ieee80211_announce(struct ieee80211com *ic) +{ + struct ifnet *ifp = ic->ic_ifp; + int i, mode, rate, mword; + const struct ieee80211_rateset *rs; + + /* NB: skip AUTO since it has no rates */ + for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) { + if (isclr(ic->ic_modecaps, mode)) + continue; + if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]); + rs = &ic->ic_sup_rates[mode]; + for (i = 0; i < rs->rs_nrates; i++) { + mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode); + if (mword == 0) + continue; + rate = ieee80211_media2rate(mword); + printf("%s%d%sMbps", (i != 0 ? " " : ""), + rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); + } + printf("\n"); + } + ieee80211_ht_announce(ic); +} + +void +ieee80211_announce_channels(struct ieee80211com *ic) +{ + const struct ieee80211_channel *c; + char type; + int i, cw; + + printf("Chan Freq CW RegPwr MinPwr MaxPwr\n"); + for (i = 0; i < ic->ic_nchans; i++) { + c = &ic->ic_channels[i]; + if (IEEE80211_IS_CHAN_ST(c)) + type = 'S'; + else if (IEEE80211_IS_CHAN_108A(c)) + type = 'T'; + else if (IEEE80211_IS_CHAN_108G(c)) + type = 'G'; + else if (IEEE80211_IS_CHAN_HT(c)) + type = 'n'; + else if (IEEE80211_IS_CHAN_A(c)) + type = 'a'; + else if (IEEE80211_IS_CHAN_ANYG(c)) + type = 'g'; + else if (IEEE80211_IS_CHAN_B(c)) + type = 'b'; + else + type = 'f'; + if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c)) + cw = 40; + else if (IEEE80211_IS_CHAN_HALF(c)) + cw = 10; + else if (IEEE80211_IS_CHAN_QUARTER(c)) + cw = 5; + else + cw = 20; + printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n" + , c->ic_ieee, c->ic_freq, type + , cw + , IEEE80211_IS_CHAN_HT40U(c) ? '+' : + IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' ' + , c->ic_maxregpower + , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0 + , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0 + ); + } +} + +static int +media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode) +{ + switch (IFM_MODE(ime->ifm_media)) { + case IFM_IEEE80211_11A: + *mode = IEEE80211_MODE_11A; + break; + case IFM_IEEE80211_11B: + *mode = IEEE80211_MODE_11B; + break; + case IFM_IEEE80211_11G: + *mode = IEEE80211_MODE_11G; + break; + case IFM_IEEE80211_FH: + *mode = IEEE80211_MODE_FH; + break; + case IFM_IEEE80211_11NA: + *mode = IEEE80211_MODE_11NA; + break; + case IFM_IEEE80211_11NG: + *mode = IEEE80211_MODE_11NG; + break; + case IFM_AUTO: + *mode = IEEE80211_MODE_AUTO; + break; + default: + return 0; + } + /* + * Turbo mode is an ``option''. + * XXX does not apply to AUTO + */ + if (ime->ifm_media & IFM_IEEE80211_TURBO) { + if (*mode == IEEE80211_MODE_11A) { + if (flags & IEEE80211_F_TURBOP) + *mode = IEEE80211_MODE_TURBO_A; + else + *mode = IEEE80211_MODE_STURBO_A; + } else if (*mode == IEEE80211_MODE_11G) + *mode = IEEE80211_MODE_TURBO_G; + else + return 0; + } + /* XXX HT40 +/- */ + return 1; +} + +/* + * Handle a media change request on the underlying interface. + */ +int +ieee80211com_media_change(struct ifnet *ifp) +{ + return EINVAL; +} + +/* + * Handle a media change request on the vap interface. + */ +int +ieee80211_media_change(struct ifnet *ifp) +{ + struct ieee80211vap *vap = ifp->if_softc; + struct ifmedia_entry *ime = vap->iv_media.ifm_cur; + uint16_t newmode; + + if (!media2mode(ime, vap->iv_flags, &newmode)) + return EINVAL; + if (vap->iv_des_mode != newmode) { + vap->iv_des_mode = newmode; + /* XXX kick state machine if up+running */ + } + return 0; +} + +/* + * Common code to calculate the media status word + * from the operating mode and channel state. + */ +static int +media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan) +{ + int status; + + status = IFM_IEEE80211; + switch (opmode) { + case IEEE80211_M_STA: + break; + case IEEE80211_M_IBSS: + status |= IFM_IEEE80211_ADHOC; + break; + case IEEE80211_M_HOSTAP: + status |= IFM_IEEE80211_HOSTAP; + break; + case IEEE80211_M_MONITOR: + status |= IFM_IEEE80211_MONITOR; + break; + case IEEE80211_M_AHDEMO: + status |= IFM_IEEE80211_ADHOC | IFM_FLAG0; + break; + case IEEE80211_M_WDS: + status |= IFM_IEEE80211_WDS; + break; + case IEEE80211_M_MBSS: + status |= IFM_IEEE80211_MBSS; + break; + } + if (IEEE80211_IS_CHAN_HTA(chan)) { + status |= IFM_IEEE80211_11NA; + } else if (IEEE80211_IS_CHAN_HTG(chan)) { + status |= IFM_IEEE80211_11NG; + } else if (IEEE80211_IS_CHAN_A(chan)) { + status |= IFM_IEEE80211_11A; + } else if (IEEE80211_IS_CHAN_B(chan)) { + status |= IFM_IEEE80211_11B; + } else if (IEEE80211_IS_CHAN_ANYG(chan)) { + status |= IFM_IEEE80211_11G; + } else if (IEEE80211_IS_CHAN_FHSS(chan)) { + status |= IFM_IEEE80211_FH; + } + /* XXX else complain? */ + + if (IEEE80211_IS_CHAN_TURBO(chan)) + status |= IFM_IEEE80211_TURBO; +#if 0 + if (IEEE80211_IS_CHAN_HT20(chan)) + status |= IFM_IEEE80211_HT20; + if (IEEE80211_IS_CHAN_HT40(chan)) + status |= IFM_IEEE80211_HT40; +#endif + return status; +} + +static void +ieee80211com_media_status(struct ifnet *ifp, struct ifmediareq *imr) +{ + struct ieee80211com *ic = ifp->if_l2com; + struct ieee80211vap *vap; + + imr->ifm_status = IFM_AVALID; + TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) + if (vap->iv_ifp->if_flags & IFF_UP) { + imr->ifm_status |= IFM_ACTIVE; + break; + } + imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan); + if (imr->ifm_status & IFM_ACTIVE) + imr->ifm_current = imr->ifm_active; +} + +void +ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr) +{ + struct ieee80211vap *vap = ifp->if_softc; + struct ieee80211com *ic = vap->iv_ic; + enum ieee80211_phymode mode; + + imr->ifm_status = IFM_AVALID; + /* + * NB: use the current channel's mode to lock down a xmit + * rate only when running; otherwise we may have a mismatch + * in which case the rate will not be convertible. + */ + if (vap->iv_state == IEEE80211_S_RUN) { + imr->ifm_status |= IFM_ACTIVE; + mode = ieee80211_chan2mode(ic->ic_curchan); + } else + mode = IEEE80211_MODE_AUTO; + imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan); + /* + * Calculate a current rate if possible. + */ + if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) { + /* + * A fixed rate is set, report that. + */ + imr->ifm_active |= ieee80211_rate2media(ic, + vap->iv_txparms[mode].ucastrate, mode); + } else if (vap->iv_opmode == IEEE80211_M_STA) { + /* + * In station mode report the current transmit rate. + */ + imr->ifm_active |= ieee80211_rate2media(ic, + vap->iv_bss->ni_txrate, mode); + } else + imr->ifm_active |= IFM_AUTO; + if (imr->ifm_status & IFM_ACTIVE) + imr->ifm_current = imr->ifm_active; +} + +/* + * Set the current phy mode and recalculate the active channel + * set based on the available channels for this mode. Also + * select a new default/current channel if the current one is + * inappropriate for this mode. + */ +int +ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode) +{ + /* + * Adjust basic rates in 11b/11g supported rate set. + * Note that if operating on a hal/quarter rate channel + * this is a noop as those rates sets are different + * and used instead. + */ + if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B) + ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode); + + ic->ic_curmode = mode; + ieee80211_reset_erp(ic); /* reset ERP state */ + + return 0; +} + +/* + * Return the phy mode for with the specified channel. + */ +enum ieee80211_phymode +ieee80211_chan2mode(const struct ieee80211_channel *chan) +{ + + if (IEEE80211_IS_CHAN_HTA(chan)) + return IEEE80211_MODE_11NA; + else if (IEEE80211_IS_CHAN_HTG(chan)) + return IEEE80211_MODE_11NG; + else if (IEEE80211_IS_CHAN_108G(chan)) + return IEEE80211_MODE_TURBO_G; + else if (IEEE80211_IS_CHAN_ST(chan)) + return IEEE80211_MODE_STURBO_A; + else if (IEEE80211_IS_CHAN_TURBO(chan)) + return IEEE80211_MODE_TURBO_A; + else if (IEEE80211_IS_CHAN_HALF(chan)) + return IEEE80211_MODE_HALF; + else if (IEEE80211_IS_CHAN_QUARTER(chan)) + return IEEE80211_MODE_QUARTER; + else if (IEEE80211_IS_CHAN_A(chan)) + return IEEE80211_MODE_11A; + else if (IEEE80211_IS_CHAN_ANYG(chan)) + return IEEE80211_MODE_11G; + else if (IEEE80211_IS_CHAN_B(chan)) + return IEEE80211_MODE_11B; + else if (IEEE80211_IS_CHAN_FHSS(chan)) + return IEEE80211_MODE_FH; + + /* NB: should not get here */ + printf("%s: cannot map channel to mode; freq %u flags 0x%x\n", + __func__, chan->ic_freq, chan->ic_flags); + return IEEE80211_MODE_11B; +} + +struct ratemedia { + u_int match; /* rate + mode */ + u_int media; /* if_media rate */ +}; + +static int +findmedia(const struct ratemedia rates[], int n, u_int match) +{ + int i; + + for (i = 0; i < n; i++) + if (rates[i].match == match) + return rates[i].media; + return IFM_AUTO; +} + +/* + * Convert IEEE80211 rate value to ifmedia subtype. + * Rate is either a legacy rate in units of 0.5Mbps + * or an MCS index. + */ +int +ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode) +{ +#define N(a) (sizeof(a) / sizeof(a[0])) + static const struct ratemedia rates[] = { + { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 }, + { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 }, + { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 }, + { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 }, + { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 }, + { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 }, + { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 }, + { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 }, + { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 }, + { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 }, + { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 }, + { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 }, + { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 }, + { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 }, + { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 }, + { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 }, + { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 }, + { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 }, + { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 }, + { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 }, + { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 }, + { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 }, + { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 }, + { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 }, + { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 }, + { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 }, + { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 }, + { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 }, + { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 }, + { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 }, + /* NB: OFDM72 doesn't realy exist so we don't handle it */ + }; + static const struct ratemedia htrates[] = { + { 0, IFM_IEEE80211_MCS }, + { 1, IFM_IEEE80211_MCS }, + { 2, IFM_IEEE80211_MCS }, + { 3, IFM_IEEE80211_MCS }, + { 4, IFM_IEEE80211_MCS }, + { 5, IFM_IEEE80211_MCS }, + { 6, IFM_IEEE80211_MCS }, + { 7, IFM_IEEE80211_MCS }, + { 8, IFM_IEEE80211_MCS }, + { 9, IFM_IEEE80211_MCS }, + { 10, IFM_IEEE80211_MCS }, + { 11, IFM_IEEE80211_MCS }, + { 12, IFM_IEEE80211_MCS }, + { 13, IFM_IEEE80211_MCS }, + { 14, IFM_IEEE80211_MCS }, + { 15, IFM_IEEE80211_MCS }, + }; + int m; + + /* + * Check 11n rates first for match as an MCS. + */ + if (mode == IEEE80211_MODE_11NA) { + if (rate & IEEE80211_RATE_MCS) { + rate &= ~IEEE80211_RATE_MCS; + m = findmedia(htrates, N(htrates), rate); + if (m != IFM_AUTO) + return m | IFM_IEEE80211_11NA; + } + } else if (mode == IEEE80211_MODE_11NG) { + /* NB: 12 is ambiguous, it will be treated as an MCS */ + if (rate & IEEE80211_RATE_MCS) { + rate &= ~IEEE80211_RATE_MCS; + m = findmedia(htrates, N(htrates), rate); + if (m != IFM_AUTO) + return m | IFM_IEEE80211_11NG; + } + } + rate &= IEEE80211_RATE_VAL; + switch (mode) { + case IEEE80211_MODE_11A: + case IEEE80211_MODE_HALF: /* XXX good 'nuf */ + case IEEE80211_MODE_QUARTER: + case IEEE80211_MODE_11NA: + case IEEE80211_MODE_TURBO_A: + case IEEE80211_MODE_STURBO_A: + return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A); + case IEEE80211_MODE_11B: + return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B); + case IEEE80211_MODE_FH: + return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH); + case IEEE80211_MODE_AUTO: + /* NB: ic may be NULL for some drivers */ + if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH) + return findmedia(rates, N(rates), + rate | IFM_IEEE80211_FH); + /* NB: hack, 11g matches both 11b+11a rates */ + /* fall thru... */ + case IEEE80211_MODE_11G: + case IEEE80211_MODE_11NG: + case IEEE80211_MODE_TURBO_G: + return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G); + } + return IFM_AUTO; +#undef N +} + +int +ieee80211_media2rate(int mword) +{ +#define N(a) (sizeof(a) / sizeof(a[0])) + static const int ieeerates[] = { + -1, /* IFM_AUTO */ + 0, /* IFM_MANUAL */ + 0, /* IFM_NONE */ + 2, /* IFM_IEEE80211_FH1 */ + 4, /* IFM_IEEE80211_FH2 */ + 2, /* IFM_IEEE80211_DS1 */ + 4, /* IFM_IEEE80211_DS2 */ + 11, /* IFM_IEEE80211_DS5 */ + 22, /* IFM_IEEE80211_DS11 */ + 44, /* IFM_IEEE80211_DS22 */ + 12, /* IFM_IEEE80211_OFDM6 */ + 18, /* IFM_IEEE80211_OFDM9 */ + 24, /* IFM_IEEE80211_OFDM12 */ + 36, /* IFM_IEEE80211_OFDM18 */ + 48, /* IFM_IEEE80211_OFDM24 */ + 72, /* IFM_IEEE80211_OFDM36 */ + 96, /* IFM_IEEE80211_OFDM48 */ + 108, /* IFM_IEEE80211_OFDM54 */ + 144, /* IFM_IEEE80211_OFDM72 */ + 0, /* IFM_IEEE80211_DS354k */ + 0, /* IFM_IEEE80211_DS512k */ + 6, /* IFM_IEEE80211_OFDM3 */ + 9, /* IFM_IEEE80211_OFDM4 */ + 54, /* IFM_IEEE80211_OFDM27 */ + -1, /* IFM_IEEE80211_MCS */ + }; + return IFM_SUBTYPE(mword) < N(ieeerates) ? + ieeerates[IFM_SUBTYPE(mword)] : 0; +#undef N +} + +/* + * The following hash function is adapted from "Hash Functions" by Bob Jenkins + * ("Algorithm Alley", Dr. Dobbs Journal, September 1997). + */ +#define mix(a, b, c) \ +do { \ + a -= b; a -= c; a ^= (c >> 13); \ + b -= c; b -= a; b ^= (a << 8); \ + c -= a; c -= b; c ^= (b >> 13); \ + a -= b; a -= c; a ^= (c >> 12); \ + b -= c; b -= a; b ^= (a << 16); \ + c -= a; c -= b; c ^= (b >> 5); \ + a -= b; a -= c; a ^= (c >> 3); \ + b -= c; b -= a; b ^= (a << 10); \ + c -= a; c -= b; c ^= (b >> 15); \ +} while (/*CONSTCOND*/0) + +uint32_t +ieee80211_mac_hash(const struct ieee80211com *ic, + const uint8_t addr[IEEE80211_ADDR_LEN]) +{ + uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key; + + b += addr[5] << 8; + b += addr[4]; + a += addr[3] << 24; + a += addr[2] << 16; + a += addr[1] << 8; + a += addr[0]; + + mix(a, b, c); + + return c; +} +#undef mix |