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ieee80211.c revision 1.12
      1  1.12  dyoung /*	$NetBSD: ieee80211.c,v 1.12 2004/05/06 07:11:40 dyoung Exp $	*/
      2   1.1  dyoung /*-
      3   1.1  dyoung  * Copyright (c) 2001 Atsushi Onoe
      4   1.1  dyoung  * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
      5   1.1  dyoung  * All rights reserved.
      6   1.1  dyoung  *
      7   1.1  dyoung  * Redistribution and use in source and binary forms, with or without
      8   1.1  dyoung  * modification, are permitted provided that the following conditions
      9   1.1  dyoung  * are met:
     10   1.1  dyoung  * 1. Redistributions of source code must retain the above copyright
     11   1.1  dyoung  *    notice, this list of conditions and the following disclaimer.
     12   1.1  dyoung  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1  dyoung  *    notice, this list of conditions and the following disclaimer in the
     14   1.1  dyoung  *    documentation and/or other materials provided with the distribution.
     15   1.1  dyoung  * 3. The name of the author may not be used to endorse or promote products
     16   1.1  dyoung  *    derived from this software without specific prior written permission.
     17   1.1  dyoung  *
     18   1.1  dyoung  * Alternatively, this software may be distributed under the terms of the
     19   1.1  dyoung  * GNU General Public License ("GPL") version 2 as published by the Free
     20   1.1  dyoung  * Software Foundation.
     21   1.1  dyoung  *
     22   1.1  dyoung  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23   1.1  dyoung  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24   1.1  dyoung  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25   1.1  dyoung  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26   1.1  dyoung  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27   1.1  dyoung  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28   1.1  dyoung  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29   1.1  dyoung  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30   1.1  dyoung  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31   1.1  dyoung  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32   1.1  dyoung  */
     33   1.1  dyoung 
     34   1.1  dyoung #include <sys/cdefs.h>
     35   1.3  dyoung #ifdef __FreeBSD__
     36  1.10  dyoung __FBSDID("$FreeBSD: src/sys/net80211/ieee80211.c,v 1.11 2004/04/02 20:19:20 sam Exp $");
     37   1.3  dyoung #else
     38  1.12  dyoung __KERNEL_RCSID(0, "$NetBSD: ieee80211.c,v 1.12 2004/05/06 07:11:40 dyoung Exp $");
     39   1.3  dyoung #endif
     40   1.1  dyoung 
     41   1.1  dyoung /*
     42   1.1  dyoung  * IEEE 802.11 generic handler
     43   1.1  dyoung  */
     44   1.1  dyoung 
     45   1.1  dyoung #include "opt_inet.h"
     46   1.7    matt #include "bpfilter.h"
     47   1.1  dyoung 
     48   1.1  dyoung #include <sys/param.h>
     49   1.1  dyoung #include <sys/systm.h>
     50   1.1  dyoung #include <sys/mbuf.h>
     51   1.1  dyoung #include <sys/malloc.h>
     52   1.1  dyoung #include <sys/kernel.h>
     53   1.1  dyoung #include <sys/socket.h>
     54   1.1  dyoung #include <sys/sockio.h>
     55   1.1  dyoung #include <sys/endian.h>
     56   1.1  dyoung #include <sys/errno.h>
     57   1.4  dyoung #ifdef __FreeBSD__
     58   1.1  dyoung #include <sys/bus.h>
     59   1.4  dyoung #endif
     60   1.1  dyoung #include <sys/proc.h>
     61   1.1  dyoung #include <sys/sysctl.h>
     62   1.1  dyoung 
     63   1.2  dyoung #ifdef __FreeBSD__
     64   1.1  dyoung #include <machine/atomic.h>
     65   1.2  dyoung #endif
     66   1.1  dyoung 
     67   1.1  dyoung #include <net/if.h>
     68   1.1  dyoung #include <net/if_dl.h>
     69   1.1  dyoung #include <net/if_media.h>
     70   1.1  dyoung #include <net/if_arp.h>
     71   1.2  dyoung #ifdef __FreeBSD__
     72   1.1  dyoung #include <net/ethernet.h>
     73   1.4  dyoung #else
     74   1.4  dyoung #include <net/if_ether.h>
     75   1.2  dyoung #endif
     76   1.1  dyoung #include <net/if_llc.h>
     77   1.1  dyoung 
     78   1.1  dyoung #include <net80211/ieee80211_var.h>
     79   1.4  dyoung #include <net80211/ieee80211_compat.h>
     80   1.1  dyoung 
     81   1.1  dyoung #include <net/bpf.h>
     82   1.1  dyoung 
     83   1.1  dyoung #ifdef INET
     84   1.1  dyoung #include <netinet/in.h>
     85   1.4  dyoung #ifdef __FreeBSD__
     86   1.1  dyoung #include <netinet/if_ether.h>
     87   1.4  dyoung #else
     88   1.4  dyoung #include <net/if_ether.h>
     89   1.4  dyoung #endif
     90   1.1  dyoung #endif
     91   1.1  dyoung 
     92   1.1  dyoung #ifdef IEEE80211_DEBUG
     93   1.1  dyoung int	ieee80211_debug = 0;
     94  1.11  dyoung #ifdef __NetBSD__
     95  1.11  dyoung static int ieee80211_debug_nodenum;
     96  1.11  dyoung #endif /* __NetBSD__ */
     97  1.11  dyoung 
     98   1.4  dyoung #ifdef __FreeBSD__
     99   1.1  dyoung SYSCTL_INT(_debug, OID_AUTO, ieee80211, CTLFLAG_RW, &ieee80211_debug,
    100   1.1  dyoung 	    0, "IEEE 802.11 media debugging printfs");
    101   1.1  dyoung #endif
    102   1.4  dyoung #endif
    103   1.1  dyoung 
    104  1.11  dyoung int	ieee80211_inact_max = IEEE80211_INACT_MAX;
    105  1.11  dyoung static int ieee80211_inact_max_nodenum;
    106  1.11  dyoung 
    107   1.1  dyoung static void ieee80211_set11gbasicrates(struct ieee80211_rateset *,
    108   1.1  dyoung 		enum ieee80211_phymode);
    109   1.1  dyoung 
    110  1.10  dyoung static const char *ieee80211_phymode_name[] = {
    111  1.10  dyoung 	"auto",		/* IEEE80211_MODE_AUTO */
    112  1.10  dyoung 	"11a",		/* IEEE80211_MODE_11A */
    113  1.10  dyoung 	"11b",		/* IEEE80211_MODE_11B */
    114  1.10  dyoung 	"11g",		/* IEEE80211_MODE_11G */
    115  1.10  dyoung 	"FH",		/* IEEE80211_MODE_FH */
    116  1.10  dyoung 	"turbo",	/* IEEE80211_MODE_TURBO */
    117  1.10  dyoung };
    118   1.1  dyoung 
    119   1.1  dyoung void
    120   1.1  dyoung ieee80211_ifattach(struct ifnet *ifp)
    121   1.1  dyoung {
    122   1.1  dyoung 	struct ieee80211com *ic = (void *)ifp;
    123   1.1  dyoung 	struct ieee80211_channel *c;
    124   1.1  dyoung 	int i;
    125   1.1  dyoung 
    126   1.1  dyoung 	ether_ifattach(ifp, ic->ic_myaddr);
    127   1.7    matt #if NBPFILTER > 0
    128   1.1  dyoung 	bpfattach2(ifp, DLT_IEEE802_11,
    129   1.1  dyoung 	    sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf);
    130   1.7    matt #endif
    131   1.1  dyoung 	ieee80211_crypto_attach(ifp);
    132   1.1  dyoung 
    133   1.1  dyoung 	/*
    134   1.1  dyoung 	 * Fill in 802.11 available channel set, mark
    135   1.1  dyoung 	 * all available channels as active, and pick
    136   1.1  dyoung 	 * a default channel if not already specified.
    137   1.1  dyoung 	 */
    138   1.1  dyoung 	memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
    139   1.1  dyoung 	ic->ic_modecaps |= 1<<IEEE80211_MODE_AUTO;
    140   1.1  dyoung 	for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
    141   1.1  dyoung 		c = &ic->ic_channels[i];
    142   1.1  dyoung 		if (c->ic_flags) {
    143   1.1  dyoung 			/*
    144   1.1  dyoung 			 * Verify driver passed us valid data.
    145   1.1  dyoung 			 */
    146   1.1  dyoung 			if (i != ieee80211_chan2ieee(ic, c)) {
    147   1.1  dyoung 				if_printf(ifp, "bad channel ignored; "
    148   1.1  dyoung 					"freq %u flags %x number %u\n",
    149   1.1  dyoung 					c->ic_freq, c->ic_flags, i);
    150   1.1  dyoung 				c->ic_flags = 0;	/* NB: remove */
    151   1.1  dyoung 				continue;
    152   1.1  dyoung 			}
    153   1.1  dyoung 			setbit(ic->ic_chan_avail, i);
    154   1.1  dyoung 			/*
    155   1.1  dyoung 			 * Identify mode capabilities.
    156   1.1  dyoung 			 */
    157   1.1  dyoung 			if (IEEE80211_IS_CHAN_A(c))
    158   1.1  dyoung 				ic->ic_modecaps |= 1<<IEEE80211_MODE_11A;
    159   1.1  dyoung 			if (IEEE80211_IS_CHAN_B(c))
    160   1.1  dyoung 				ic->ic_modecaps |= 1<<IEEE80211_MODE_11B;
    161   1.1  dyoung 			if (IEEE80211_IS_CHAN_PUREG(c))
    162   1.1  dyoung 				ic->ic_modecaps |= 1<<IEEE80211_MODE_11G;
    163   1.5  dyoung 			if (IEEE80211_IS_CHAN_FHSS(c))
    164   1.5  dyoung 				ic->ic_modecaps |= 1<<IEEE80211_MODE_FH;
    165   1.1  dyoung 			if (IEEE80211_IS_CHAN_T(c))
    166   1.1  dyoung 				ic->ic_modecaps |= 1<<IEEE80211_MODE_TURBO;
    167   1.1  dyoung 		}
    168   1.1  dyoung 	}
    169   1.1  dyoung 	/* validate ic->ic_curmode */
    170   1.1  dyoung 	if ((ic->ic_modecaps & (1<<ic->ic_curmode)) == 0)
    171   1.1  dyoung 		ic->ic_curmode = IEEE80211_MODE_AUTO;
    172  1.10  dyoung 	ic->ic_des_chan = IEEE80211_CHAN_ANYC;	/* any channel is ok */
    173   1.1  dyoung 
    174   1.1  dyoung 	(void) ieee80211_setmode(ic, ic->ic_curmode);
    175   1.1  dyoung 
    176   1.1  dyoung 	if (ic->ic_lintval == 0)
    177   1.1  dyoung 		ic->ic_lintval = 100;		/* default sleep */
    178   1.1  dyoung 	ic->ic_bmisstimeout = 7*ic->ic_lintval;	/* default 7 beacons */
    179   1.1  dyoung 
    180   1.1  dyoung 	ieee80211_node_attach(ifp);
    181   1.1  dyoung 	ieee80211_proto_attach(ifp);
    182   1.1  dyoung }
    183   1.1  dyoung 
    184   1.1  dyoung void
    185   1.1  dyoung ieee80211_ifdetach(struct ifnet *ifp)
    186   1.1  dyoung {
    187   1.1  dyoung 	struct ieee80211com *ic = (void *)ifp;
    188   1.1  dyoung 
    189   1.1  dyoung 	ieee80211_proto_detach(ifp);
    190   1.1  dyoung 	ieee80211_crypto_detach(ifp);
    191   1.1  dyoung 	ieee80211_node_detach(ifp);
    192   1.4  dyoung #ifdef __FreeBSD__
    193   1.1  dyoung 	ifmedia_removeall(&ic->ic_media);
    194   1.4  dyoung #else
    195   1.4  dyoung         ifmedia_delete_instance(&ic->ic_media, IFM_INST_ANY);
    196   1.4  dyoung #endif
    197   1.7    matt #if NBPFILTER > 0
    198   1.1  dyoung 	bpfdetach(ifp);
    199   1.7    matt #endif
    200   1.1  dyoung 	ether_ifdetach(ifp);
    201   1.1  dyoung }
    202   1.1  dyoung 
    203   1.1  dyoung /*
    204   1.1  dyoung  * Convert MHz frequency to IEEE channel number.
    205   1.1  dyoung  */
    206   1.1  dyoung u_int
    207   1.1  dyoung ieee80211_mhz2ieee(u_int freq, u_int flags)
    208   1.1  dyoung {
    209   1.1  dyoung 	if (flags & IEEE80211_CHAN_2GHZ) {	/* 2GHz band */
    210   1.1  dyoung 		if (freq == 2484)
    211   1.1  dyoung 			return 14;
    212   1.1  dyoung 		if (freq < 2484)
    213   1.1  dyoung 			return (freq - 2407) / 5;
    214   1.1  dyoung 		else
    215   1.1  dyoung 			return 15 + ((freq - 2512) / 20);
    216   1.1  dyoung 	} else if (flags & IEEE80211_CHAN_5GHZ) {	/* 5Ghz band */
    217   1.1  dyoung 		return (freq - 5000) / 5;
    218   1.1  dyoung 	} else {				/* either, guess */
    219   1.1  dyoung 		if (freq == 2484)
    220   1.1  dyoung 			return 14;
    221   1.1  dyoung 		if (freq < 2484)
    222   1.1  dyoung 			return (freq - 2407) / 5;
    223   1.1  dyoung 		if (freq < 5000)
    224   1.1  dyoung 			return 15 + ((freq - 2512) / 20);
    225   1.1  dyoung 		return (freq - 5000) / 5;
    226   1.1  dyoung 	}
    227   1.1  dyoung }
    228   1.1  dyoung 
    229   1.1  dyoung /*
    230   1.1  dyoung  * Convert channel to IEEE channel number.
    231   1.1  dyoung  */
    232   1.1  dyoung u_int
    233   1.1  dyoung ieee80211_chan2ieee(struct ieee80211com *ic, struct ieee80211_channel *c)
    234   1.1  dyoung {
    235   1.1  dyoung 	if (ic->ic_channels <= c && c <= &ic->ic_channels[IEEE80211_CHAN_MAX])
    236   1.1  dyoung 		return c - ic->ic_channels;
    237   1.1  dyoung 	else if (c == IEEE80211_CHAN_ANYC)
    238   1.1  dyoung 		return IEEE80211_CHAN_ANY;
    239   1.1  dyoung 	else if (c != NULL) {
    240   1.1  dyoung 		if_printf(&ic->ic_if, "invalid channel freq %u flags %x\n",
    241   1.1  dyoung 			c->ic_freq, c->ic_flags);
    242   1.1  dyoung 		return 0;		/* XXX */
    243   1.1  dyoung 	} else {
    244   1.1  dyoung 		if_printf(&ic->ic_if, "invalid channel (NULL)\n");
    245   1.1  dyoung 		return 0;		/* XXX */
    246   1.1  dyoung 	}
    247   1.1  dyoung }
    248   1.1  dyoung 
    249   1.1  dyoung /*
    250   1.1  dyoung  * Convert IEEE channel number to MHz frequency.
    251   1.1  dyoung  */
    252   1.1  dyoung u_int
    253   1.1  dyoung ieee80211_ieee2mhz(u_int chan, u_int flags)
    254   1.1  dyoung {
    255   1.1  dyoung 	if (flags & IEEE80211_CHAN_2GHZ) {	/* 2GHz band */
    256   1.1  dyoung 		if (chan == 14)
    257   1.1  dyoung 			return 2484;
    258   1.1  dyoung 		if (chan < 14)
    259   1.1  dyoung 			return 2407 + chan*5;
    260   1.1  dyoung 		else
    261   1.1  dyoung 			return 2512 + ((chan-15)*20);
    262   1.1  dyoung 	} else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
    263   1.1  dyoung 		return 5000 + (chan*5);
    264   1.1  dyoung 	} else {				/* either, guess */
    265   1.1  dyoung 		if (chan == 14)
    266   1.1  dyoung 			return 2484;
    267   1.1  dyoung 		if (chan < 14)			/* 0-13 */
    268   1.1  dyoung 			return 2407 + chan*5;
    269   1.1  dyoung 		if (chan < 27)			/* 15-26 */
    270   1.1  dyoung 			return 2512 + ((chan-15)*20);
    271   1.1  dyoung 		return 5000 + (chan*5);
    272   1.1  dyoung 	}
    273   1.1  dyoung }
    274   1.1  dyoung 
    275   1.1  dyoung /*
    276   1.1  dyoung  * Setup the media data structures according to the channel and
    277   1.1  dyoung  * rate tables.  This must be called by the driver after
    278   1.1  dyoung  * ieee80211_attach and before most anything else.
    279   1.1  dyoung  */
    280   1.1  dyoung void
    281   1.1  dyoung ieee80211_media_init(struct ifnet *ifp,
    282   1.1  dyoung 	ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
    283   1.1  dyoung {
    284   1.1  dyoung #define	ADD(_ic, _s, _o) \
    285   1.1  dyoung 	ifmedia_add(&(_ic)->ic_media, \
    286   1.1  dyoung 		IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
    287   1.1  dyoung 	struct ieee80211com *ic = (void *)ifp;
    288   1.1  dyoung 	struct ifmediareq imr;
    289   1.1  dyoung 	int i, j, mode, rate, maxrate, mword, mopt, r;
    290   1.1  dyoung 	struct ieee80211_rateset *rs;
    291   1.1  dyoung 	struct ieee80211_rateset allrates;
    292   1.1  dyoung 
    293   1.1  dyoung 	/*
    294   1.1  dyoung 	 * Do late attach work that must wait for any subclass
    295   1.1  dyoung 	 * (i.e. driver) work such as overriding methods.
    296   1.1  dyoung 	 */
    297   1.1  dyoung 	ieee80211_node_lateattach(ifp);
    298   1.1  dyoung 
    299   1.1  dyoung 	/*
    300   1.1  dyoung 	 * Fill in media characteristics.
    301   1.1  dyoung 	 */
    302   1.1  dyoung 	ifmedia_init(&ic->ic_media, 0, media_change, media_stat);
    303   1.1  dyoung 	maxrate = 0;
    304   1.1  dyoung 	memset(&allrates, 0, sizeof(allrates));
    305   1.1  dyoung 	for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_MAX; mode++) {
    306   1.1  dyoung 		static const u_int mopts[] = {
    307   1.1  dyoung 			IFM_AUTO,
    308   1.5  dyoung 			IFM_IEEE80211_11A,
    309   1.5  dyoung 			IFM_IEEE80211_11B,
    310   1.5  dyoung 			IFM_IEEE80211_11G,
    311   1.5  dyoung 			IFM_IEEE80211_FH,
    312   1.5  dyoung 			IFM_IEEE80211_11A | IFM_IEEE80211_TURBO,
    313   1.1  dyoung 		};
    314   1.1  dyoung 		if ((ic->ic_modecaps & (1<<mode)) == 0)
    315   1.1  dyoung 			continue;
    316   1.1  dyoung 		mopt = mopts[mode];
    317   1.1  dyoung 		ADD(ic, IFM_AUTO, mopt);	/* e.g. 11a auto */
    318   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_IBSS)
    319   1.1  dyoung 			ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC);
    320   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_HOSTAP)
    321   1.1  dyoung 			ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_HOSTAP);
    322   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_AHDEMO)
    323   1.1  dyoung 			ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
    324   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_MONITOR)
    325   1.1  dyoung 			ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_MONITOR);
    326   1.1  dyoung 		if (mode == IEEE80211_MODE_AUTO)
    327   1.1  dyoung 			continue;
    328  1.10  dyoung 		if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
    329   1.1  dyoung 		rs = &ic->ic_sup_rates[mode];
    330   1.1  dyoung 		for (i = 0; i < rs->rs_nrates; i++) {
    331   1.1  dyoung 			rate = rs->rs_rates[i];
    332   1.1  dyoung 			mword = ieee80211_rate2media(ic, rate, mode);
    333   1.1  dyoung 			if (mword == 0)
    334   1.1  dyoung 				continue;
    335   1.1  dyoung 			printf("%s%d%sMbps", (i != 0 ? " " : ""),
    336   1.1  dyoung 			    (rate & IEEE80211_RATE_VAL) / 2,
    337   1.1  dyoung 			    ((rate & 0x1) != 0 ? ".5" : ""));
    338   1.1  dyoung 			ADD(ic, mword, mopt);
    339   1.1  dyoung 			if (ic->ic_caps & IEEE80211_C_IBSS)
    340   1.1  dyoung 				ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC);
    341   1.1  dyoung 			if (ic->ic_caps & IEEE80211_C_HOSTAP)
    342   1.1  dyoung 				ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP);
    343   1.1  dyoung 			if (ic->ic_caps & IEEE80211_C_AHDEMO)
    344   1.1  dyoung 				ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
    345   1.1  dyoung 			if (ic->ic_caps & IEEE80211_C_MONITOR)
    346   1.1  dyoung 				ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR);
    347   1.1  dyoung 			/*
    348   1.1  dyoung 			 * Add rate to the collection of all rates.
    349   1.1  dyoung 			 */
    350   1.1  dyoung 			r = rate & IEEE80211_RATE_VAL;
    351   1.1  dyoung 			for (j = 0; j < allrates.rs_nrates; j++)
    352   1.1  dyoung 				if (allrates.rs_rates[j] == r)
    353   1.1  dyoung 					break;
    354   1.1  dyoung 			if (j == allrates.rs_nrates) {
    355   1.1  dyoung 				/* unique, add to the set */
    356   1.1  dyoung 				allrates.rs_rates[j] = r;
    357   1.1  dyoung 				allrates.rs_nrates++;
    358   1.1  dyoung 			}
    359   1.1  dyoung 			rate = (rate & IEEE80211_RATE_VAL) / 2;
    360   1.1  dyoung 			if (rate > maxrate)
    361   1.1  dyoung 				maxrate = rate;
    362   1.1  dyoung 		}
    363   1.1  dyoung 		printf("\n");
    364   1.1  dyoung 	}
    365   1.1  dyoung 	for (i = 0; i < allrates.rs_nrates; i++) {
    366   1.1  dyoung 		mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
    367   1.1  dyoung 				IEEE80211_MODE_AUTO);
    368   1.1  dyoung 		if (mword == 0)
    369   1.1  dyoung 			continue;
    370   1.1  dyoung 		mword = IFM_SUBTYPE(mword);	/* remove media options */
    371   1.1  dyoung 		ADD(ic, mword, 0);
    372   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_IBSS)
    373   1.1  dyoung 			ADD(ic, mword, IFM_IEEE80211_ADHOC);
    374   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_HOSTAP)
    375   1.1  dyoung 			ADD(ic, mword, IFM_IEEE80211_HOSTAP);
    376   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_AHDEMO)
    377   1.1  dyoung 			ADD(ic, mword, IFM_IEEE80211_ADHOC | IFM_FLAG0);
    378   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_MONITOR)
    379   1.1  dyoung 			ADD(ic, mword, IFM_IEEE80211_MONITOR);
    380   1.1  dyoung 	}
    381   1.1  dyoung 	ieee80211_media_status(ifp, &imr);
    382   1.1  dyoung 	ifmedia_set(&ic->ic_media, imr.ifm_active);
    383   1.1  dyoung 
    384   1.1  dyoung 	if (maxrate)
    385   1.1  dyoung 		ifp->if_baudrate = IF_Mbps(maxrate);
    386   1.5  dyoung 
    387   1.5  dyoung 	if (ic->ic_max_aid == 0)
    388   1.5  dyoung 		ic->ic_max_aid = IEEE80211_MAX_AID;
    389   1.5  dyoung 
    390   1.1  dyoung #undef ADD
    391   1.1  dyoung }
    392   1.1  dyoung 
    393   1.1  dyoung static int
    394   1.1  dyoung findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
    395   1.1  dyoung {
    396   1.1  dyoung #define	IEEERATE(_ic,_m,_i) \
    397   1.1  dyoung 	((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL)
    398   1.1  dyoung 	int i, nrates = ic->ic_sup_rates[mode].rs_nrates;
    399   1.1  dyoung 	for (i = 0; i < nrates; i++)
    400   1.1  dyoung 		if (IEEERATE(ic, mode, i) == rate)
    401   1.1  dyoung 			return i;
    402   1.1  dyoung 	return -1;
    403   1.1  dyoung #undef IEEERATE
    404   1.1  dyoung }
    405   1.1  dyoung 
    406   1.1  dyoung /*
    407   1.1  dyoung  * Handle a media change request.
    408   1.1  dyoung  */
    409   1.1  dyoung int
    410   1.1  dyoung ieee80211_media_change(struct ifnet *ifp)
    411   1.1  dyoung {
    412   1.1  dyoung 	struct ieee80211com *ic = (void *)ifp;
    413   1.1  dyoung 	struct ifmedia_entry *ime;
    414   1.1  dyoung 	enum ieee80211_opmode newopmode;
    415   1.1  dyoung 	enum ieee80211_phymode newphymode;
    416   1.1  dyoung 	int i, j, newrate, error = 0;
    417   1.1  dyoung 
    418   1.1  dyoung 	ime = ic->ic_media.ifm_cur;
    419   1.1  dyoung 	/*
    420   1.1  dyoung 	 * First, identify the phy mode.
    421   1.1  dyoung 	 */
    422   1.1  dyoung 	switch (IFM_MODE(ime->ifm_media)) {
    423   1.1  dyoung 	case IFM_IEEE80211_11A:
    424   1.1  dyoung 		newphymode = IEEE80211_MODE_11A;
    425   1.1  dyoung 		break;
    426   1.1  dyoung 	case IFM_IEEE80211_11B:
    427   1.1  dyoung 		newphymode = IEEE80211_MODE_11B;
    428   1.1  dyoung 		break;
    429   1.1  dyoung 	case IFM_IEEE80211_11G:
    430   1.1  dyoung 		newphymode = IEEE80211_MODE_11G;
    431   1.1  dyoung 		break;
    432   1.5  dyoung 	case IFM_IEEE80211_FH:
    433   1.5  dyoung 		newphymode = IEEE80211_MODE_FH;
    434   1.5  dyoung 		break;
    435   1.1  dyoung 	case IFM_AUTO:
    436   1.1  dyoung 		newphymode = IEEE80211_MODE_AUTO;
    437   1.1  dyoung 		break;
    438   1.1  dyoung 	default:
    439   1.1  dyoung 		return EINVAL;
    440   1.1  dyoung 	}
    441   1.1  dyoung 	/*
    442   1.1  dyoung 	 * Turbo mode is an ``option''.  Eventually it
    443   1.1  dyoung 	 * needs to be applied to 11g too.
    444   1.1  dyoung 	 */
    445   1.1  dyoung 	if (ime->ifm_media & IFM_IEEE80211_TURBO) {
    446   1.1  dyoung 		if (newphymode != IEEE80211_MODE_11A)
    447   1.1  dyoung 			return EINVAL;
    448   1.1  dyoung 		newphymode = IEEE80211_MODE_TURBO;
    449   1.1  dyoung 	}
    450   1.1  dyoung 	/*
    451   1.1  dyoung 	 * Validate requested mode is available.
    452   1.1  dyoung 	 */
    453   1.1  dyoung 	if ((ic->ic_modecaps & (1<<newphymode)) == 0)
    454   1.1  dyoung 		return EINVAL;
    455   1.1  dyoung 
    456   1.1  dyoung 	/*
    457   1.1  dyoung 	 * Next, the fixed/variable rate.
    458   1.1  dyoung 	 */
    459   1.1  dyoung 	i = -1;
    460   1.1  dyoung 	if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
    461   1.1  dyoung 		/*
    462   1.1  dyoung 		 * Convert media subtype to rate.
    463   1.1  dyoung 		 */
    464   1.1  dyoung 		newrate = ieee80211_media2rate(ime->ifm_media);
    465   1.1  dyoung 		if (newrate == 0)
    466   1.1  dyoung 			return EINVAL;
    467   1.1  dyoung 		/*
    468   1.1  dyoung 		 * Check the rate table for the specified/current phy.
    469   1.1  dyoung 		 */
    470   1.1  dyoung 		if (newphymode == IEEE80211_MODE_AUTO) {
    471   1.1  dyoung 			/*
    472   1.1  dyoung 			 * In autoselect mode search for the rate.
    473   1.1  dyoung 			 */
    474   1.1  dyoung 			for (j = IEEE80211_MODE_11A;
    475   1.1  dyoung 			     j < IEEE80211_MODE_MAX; j++) {
    476   1.1  dyoung 				if ((ic->ic_modecaps & (1<<j)) == 0)
    477   1.1  dyoung 					continue;
    478   1.1  dyoung 				i = findrate(ic, j, newrate);
    479   1.1  dyoung 				if (i != -1) {
    480   1.1  dyoung 					/* lock mode too */
    481   1.1  dyoung 					newphymode = j;
    482   1.1  dyoung 					break;
    483   1.1  dyoung 				}
    484   1.1  dyoung 			}
    485   1.1  dyoung 		} else {
    486   1.1  dyoung 			i = findrate(ic, newphymode, newrate);
    487   1.1  dyoung 		}
    488   1.1  dyoung 		if (i == -1)			/* mode/rate mismatch */
    489   1.1  dyoung 			return EINVAL;
    490   1.1  dyoung 	}
    491   1.1  dyoung 	/* NB: defer rate setting to later */
    492   1.1  dyoung 
    493   1.1  dyoung 	/*
    494   1.1  dyoung 	 * Deduce new operating mode but don't install it just yet.
    495   1.1  dyoung 	 */
    496   1.1  dyoung 	if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) ==
    497   1.1  dyoung 	    (IFM_IEEE80211_ADHOC|IFM_FLAG0))
    498   1.1  dyoung 		newopmode = IEEE80211_M_AHDEMO;
    499   1.1  dyoung 	else if (ime->ifm_media & IFM_IEEE80211_HOSTAP)
    500   1.1  dyoung 		newopmode = IEEE80211_M_HOSTAP;
    501   1.1  dyoung 	else if (ime->ifm_media & IFM_IEEE80211_ADHOC)
    502   1.1  dyoung 		newopmode = IEEE80211_M_IBSS;
    503   1.1  dyoung 	else if (ime->ifm_media & IFM_IEEE80211_MONITOR)
    504   1.1  dyoung 		newopmode = IEEE80211_M_MONITOR;
    505   1.1  dyoung 	else
    506   1.1  dyoung 		newopmode = IEEE80211_M_STA;
    507   1.1  dyoung 
    508   1.1  dyoung 	/*
    509   1.1  dyoung 	 * Autoselect doesn't make sense when operating as an AP.
    510   1.1  dyoung 	 * If no phy mode has been selected, pick one and lock it
    511   1.1  dyoung 	 * down so rate tables can be used in forming beacon frames
    512   1.1  dyoung 	 * and the like.
    513   1.1  dyoung 	 */
    514   1.1  dyoung 	if (newopmode == IEEE80211_M_HOSTAP &&
    515   1.1  dyoung 	    newphymode == IEEE80211_MODE_AUTO) {
    516   1.1  dyoung 		for (j = IEEE80211_MODE_11A; j < IEEE80211_MODE_MAX; j++)
    517   1.1  dyoung 			if (ic->ic_modecaps & (1<<j)) {
    518   1.1  dyoung 				newphymode = j;
    519   1.1  dyoung 				break;
    520   1.1  dyoung 			}
    521   1.1  dyoung 	}
    522   1.1  dyoung 
    523   1.1  dyoung 	/*
    524   1.1  dyoung 	 * Handle phy mode change.
    525   1.1  dyoung 	 */
    526   1.1  dyoung 	if (ic->ic_curmode != newphymode) {		/* change phy mode */
    527   1.1  dyoung 		error = ieee80211_setmode(ic, newphymode);
    528   1.1  dyoung 		if (error != 0)
    529   1.1  dyoung 			return error;
    530   1.1  dyoung 		error = ENETRESET;
    531   1.1  dyoung 	}
    532   1.1  dyoung 
    533   1.1  dyoung 	/*
    534   1.1  dyoung 	 * Committed to changes, install the rate setting.
    535   1.1  dyoung 	 */
    536   1.1  dyoung 	if (ic->ic_fixed_rate != i) {
    537   1.1  dyoung 		ic->ic_fixed_rate = i;			/* set fixed tx rate */
    538   1.1  dyoung 		error = ENETRESET;
    539   1.1  dyoung 	}
    540   1.1  dyoung 
    541   1.1  dyoung 	/*
    542   1.1  dyoung 	 * Handle operating mode change.
    543   1.1  dyoung 	 */
    544   1.1  dyoung 	if (ic->ic_opmode != newopmode) {
    545   1.1  dyoung 		ic->ic_opmode = newopmode;
    546   1.1  dyoung 		switch (newopmode) {
    547   1.1  dyoung 		case IEEE80211_M_AHDEMO:
    548   1.1  dyoung 		case IEEE80211_M_HOSTAP:
    549   1.1  dyoung 		case IEEE80211_M_STA:
    550   1.1  dyoung 		case IEEE80211_M_MONITOR:
    551   1.1  dyoung 			ic->ic_flags &= ~IEEE80211_F_IBSSON;
    552   1.1  dyoung 			break;
    553   1.1  dyoung 		case IEEE80211_M_IBSS:
    554   1.1  dyoung 			ic->ic_flags |= IEEE80211_F_IBSSON;
    555   1.1  dyoung #ifdef notdef
    556   1.1  dyoung 			if (ic->ic_curmode == IEEE80211_MODE_11G)
    557   1.1  dyoung 				ieee80211_set11gbasicrates(
    558   1.1  dyoung 					&ic->ic_suprates[newphymode],
    559   1.1  dyoung 					IEEE80211_MODE_11B);
    560   1.1  dyoung #endif
    561   1.1  dyoung 			break;
    562   1.1  dyoung 		}
    563   1.1  dyoung 		error = ENETRESET;
    564   1.1  dyoung 	}
    565   1.1  dyoung #ifdef notdef
    566   1.1  dyoung 	if (error == 0)
    567   1.1  dyoung 		ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
    568   1.1  dyoung #endif
    569   1.1  dyoung 	return error;
    570   1.1  dyoung }
    571   1.1  dyoung 
    572   1.1  dyoung void
    573   1.1  dyoung ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
    574   1.1  dyoung {
    575   1.1  dyoung 	struct ieee80211com *ic = (void *)ifp;
    576   1.1  dyoung 	struct ieee80211_node *ni = NULL;
    577   1.1  dyoung 
    578   1.1  dyoung 	imr->ifm_status = IFM_AVALID;
    579   1.1  dyoung 	imr->ifm_active = IFM_IEEE80211;
    580   1.1  dyoung 	if (ic->ic_state == IEEE80211_S_RUN)
    581   1.1  dyoung 		imr->ifm_status |= IFM_ACTIVE;
    582   1.1  dyoung 	imr->ifm_active |= IFM_AUTO;
    583   1.1  dyoung 	switch (ic->ic_opmode) {
    584   1.1  dyoung 	case IEEE80211_M_STA:
    585   1.1  dyoung 		ni = ic->ic_bss;
    586   1.1  dyoung 		/* calculate rate subtype */
    587   1.1  dyoung 		imr->ifm_active |= ieee80211_rate2media(ic,
    588   1.1  dyoung 			ni->ni_rates.rs_rates[ni->ni_txrate], ic->ic_curmode);
    589   1.1  dyoung 		break;
    590   1.1  dyoung 	case IEEE80211_M_IBSS:
    591   1.1  dyoung 		imr->ifm_active |= IFM_IEEE80211_ADHOC;
    592   1.1  dyoung 		break;
    593   1.1  dyoung 	case IEEE80211_M_AHDEMO:
    594   1.1  dyoung 		/* should not come here */
    595   1.1  dyoung 		break;
    596   1.1  dyoung 	case IEEE80211_M_HOSTAP:
    597   1.1  dyoung 		imr->ifm_active |= IFM_IEEE80211_HOSTAP;
    598   1.1  dyoung 		break;
    599   1.1  dyoung 	case IEEE80211_M_MONITOR:
    600   1.1  dyoung 		imr->ifm_active |= IFM_IEEE80211_MONITOR;
    601   1.1  dyoung 		break;
    602   1.1  dyoung 	}
    603   1.1  dyoung 	switch (ic->ic_curmode) {
    604   1.1  dyoung 	case IEEE80211_MODE_11A:
    605   1.5  dyoung 		imr->ifm_active |= IFM_IEEE80211_11A;
    606   1.1  dyoung 		break;
    607   1.1  dyoung 	case IEEE80211_MODE_11B:
    608   1.5  dyoung 		imr->ifm_active |= IFM_IEEE80211_11B;
    609   1.1  dyoung 		break;
    610   1.1  dyoung 	case IEEE80211_MODE_11G:
    611   1.5  dyoung 		imr->ifm_active |= IFM_IEEE80211_11G;
    612   1.5  dyoung 		break;
    613   1.5  dyoung 	case IEEE80211_MODE_FH:
    614   1.5  dyoung 		imr->ifm_active |= IFM_IEEE80211_FH;
    615   1.1  dyoung 		break;
    616   1.1  dyoung 	case IEEE80211_MODE_TURBO:
    617   1.5  dyoung 		imr->ifm_active |= IFM_IEEE80211_11A
    618   1.1  dyoung 				|  IFM_IEEE80211_TURBO;
    619   1.1  dyoung 		break;
    620   1.1  dyoung 	}
    621   1.1  dyoung }
    622   1.1  dyoung 
    623   1.1  dyoung void
    624   1.1  dyoung ieee80211_watchdog(struct ifnet *ifp)
    625   1.1  dyoung {
    626   1.1  dyoung 	struct ieee80211com *ic = (void *)ifp;
    627   1.1  dyoung 
    628   1.1  dyoung 	if (ic->ic_mgt_timer && --ic->ic_mgt_timer == 0)
    629   1.1  dyoung 		ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
    630   1.1  dyoung 	if (ic->ic_inact_timer && --ic->ic_inact_timer == 0)
    631   1.1  dyoung 		ieee80211_timeout_nodes(ic);
    632   1.1  dyoung 
    633   1.1  dyoung 	if (ic->ic_mgt_timer != 0 || ic->ic_inact_timer != 0)
    634   1.1  dyoung 		ifp->if_timer = 1;
    635   1.1  dyoung }
    636   1.1  dyoung 
    637   1.1  dyoung /*
    638   1.1  dyoung  * Mark the basic rates for the 11g rate table based on the
    639   1.1  dyoung  * operating mode.  For real 11g we mark all the 11b rates
    640   1.1  dyoung  * and 6, 12, and 24 OFDM.  For 11b compatibility we mark only
    641   1.1  dyoung  * 11b rates.  There's also a pseudo 11a-mode used to mark only
    642   1.1  dyoung  * the basic OFDM rates.
    643   1.1  dyoung  */
    644   1.1  dyoung static void
    645   1.1  dyoung ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
    646   1.1  dyoung {
    647   1.1  dyoung 	static const struct ieee80211_rateset basic[] = {
    648   1.1  dyoung 	    { 3, { 12, 24, 48 } },		/* IEEE80211_MODE_11A */
    649   1.1  dyoung 	    { 4, { 2, 4, 11, 22 } },		/* IEEE80211_MODE_11B */
    650   1.1  dyoung 	    { 7, { 2, 4, 11, 22, 12, 24, 48 } },/* IEEE80211_MODE_11G */
    651   1.5  dyoung 	    { 0 },				/* IEEE80211_MODE_FH */
    652   1.1  dyoung 	    { 0 },				/* IEEE80211_MODE_TURBO	*/
    653   1.1  dyoung 	};
    654   1.1  dyoung 	int i, j;
    655   1.1  dyoung 
    656   1.1  dyoung 	for (i = 0; i < rs->rs_nrates; i++) {
    657   1.1  dyoung 		rs->rs_rates[i] &= IEEE80211_RATE_VAL;
    658   1.1  dyoung 		for (j = 0; j < basic[mode].rs_nrates; j++)
    659   1.1  dyoung 			if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
    660   1.1  dyoung 				rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
    661   1.1  dyoung 				break;
    662   1.1  dyoung 			}
    663   1.1  dyoung 	}
    664   1.1  dyoung }
    665   1.1  dyoung 
    666   1.1  dyoung /*
    667   1.1  dyoung  * Set the current phy mode and recalculate the active channel
    668   1.1  dyoung  * set based on the available channels for this mode.  Also
    669   1.1  dyoung  * select a new default/current channel if the current one is
    670   1.1  dyoung  * inappropriate for this mode.
    671   1.1  dyoung  */
    672   1.1  dyoung int
    673   1.1  dyoung ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
    674   1.1  dyoung {
    675   1.1  dyoung #define	N(a)	(sizeof(a) / sizeof(a[0]))
    676   1.1  dyoung 	static const u_int chanflags[] = {
    677   1.1  dyoung 		0,			/* IEEE80211_MODE_AUTO */
    678   1.1  dyoung 		IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
    679   1.1  dyoung 		IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
    680   1.1  dyoung 		IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
    681   1.5  dyoung 		IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
    682   1.1  dyoung 		IEEE80211_CHAN_T,	/* IEEE80211_MODE_TURBO	*/
    683   1.1  dyoung 	};
    684   1.1  dyoung 	struct ieee80211_channel *c;
    685   1.1  dyoung 	u_int modeflags;
    686   1.1  dyoung 	int i;
    687   1.1  dyoung 
    688   1.1  dyoung 	/* validate new mode */
    689   1.1  dyoung 	if ((ic->ic_modecaps & (1<<mode)) == 0) {
    690   1.1  dyoung 		IEEE80211_DPRINTF(("%s: mode %u not supported (caps 0x%x)\n",
    691   1.1  dyoung 			__func__, mode, ic->ic_modecaps));
    692   1.1  dyoung 		return EINVAL;
    693   1.1  dyoung 	}
    694   1.1  dyoung 
    695   1.1  dyoung 	/*
    696   1.1  dyoung 	 * Verify at least one channel is present in the available
    697   1.1  dyoung 	 * channel list before committing to the new mode.
    698   1.1  dyoung 	 */
    699  1.10  dyoung 	IASSERT(mode < N(chanflags), ("Unexpected mode %u", mode));
    700   1.1  dyoung 	modeflags = chanflags[mode];
    701   1.1  dyoung 	for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
    702   1.1  dyoung 		c = &ic->ic_channels[i];
    703   1.1  dyoung 		if (mode == IEEE80211_MODE_AUTO) {
    704   1.1  dyoung 			/* ignore turbo channels for autoselect */
    705   1.1  dyoung 			if ((c->ic_flags &~ IEEE80211_CHAN_TURBO) != 0)
    706   1.1  dyoung 				break;
    707   1.1  dyoung 		} else {
    708   1.1  dyoung 			if ((c->ic_flags & modeflags) == modeflags)
    709   1.1  dyoung 				break;
    710   1.1  dyoung 		}
    711   1.1  dyoung 	}
    712   1.1  dyoung 	if (i > IEEE80211_CHAN_MAX) {
    713   1.1  dyoung 		IEEE80211_DPRINTF(("%s: no channels found for mode %u\n",
    714   1.1  dyoung 			__func__, mode));
    715   1.1  dyoung 		return EINVAL;
    716   1.1  dyoung 	}
    717   1.1  dyoung 
    718   1.1  dyoung 	/*
    719   1.1  dyoung 	 * Calculate the active channel set.
    720   1.1  dyoung 	 */
    721   1.1  dyoung 	memset(ic->ic_chan_active, 0, sizeof(ic->ic_chan_active));
    722   1.1  dyoung 	for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
    723   1.1  dyoung 		c = &ic->ic_channels[i];
    724   1.1  dyoung 		if (mode == IEEE80211_MODE_AUTO) {
    725   1.1  dyoung 			/* take anything but pure turbo channels */
    726   1.1  dyoung 			if ((c->ic_flags &~ IEEE80211_CHAN_TURBO) != 0)
    727   1.1  dyoung 				setbit(ic->ic_chan_active, i);
    728   1.1  dyoung 		} else {
    729   1.1  dyoung 			if ((c->ic_flags & modeflags) == modeflags)
    730   1.1  dyoung 				setbit(ic->ic_chan_active, i);
    731   1.1  dyoung 		}
    732   1.1  dyoung 	}
    733   1.1  dyoung 	/*
    734   1.1  dyoung 	 * If no current/default channel is setup or the current
    735   1.1  dyoung 	 * channel is wrong for the mode then pick the first
    736   1.1  dyoung 	 * available channel from the active list.  This is likely
    737   1.1  dyoung 	 * not the right one.
    738   1.1  dyoung 	 */
    739   1.1  dyoung 	if (ic->ic_ibss_chan == NULL ||
    740   1.1  dyoung 	    isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) {
    741   1.1  dyoung 		for (i = 0; i <= IEEE80211_CHAN_MAX; i++)
    742   1.1  dyoung 			if (isset(ic->ic_chan_active, i)) {
    743   1.1  dyoung 				ic->ic_ibss_chan = &ic->ic_channels[i];
    744   1.1  dyoung 				break;
    745   1.1  dyoung 			}
    746   1.9  dyoung 		IASSERT(ic->ic_ibss_chan != NULL &&
    747   1.5  dyoung 		    isset(ic->ic_chan_active,
    748   1.5  dyoung 			ieee80211_chan2ieee(ic, ic->ic_ibss_chan)),
    749   1.5  dyoung 		    ("Bad IBSS channel %u\n",
    750   1.5  dyoung 		     ieee80211_chan2ieee(ic, ic->ic_ibss_chan)));
    751   1.1  dyoung 	}
    752   1.1  dyoung 
    753   1.1  dyoung 	/*
    754   1.1  dyoung 	 * Set/reset state flags that influence beacon contents, etc.
    755   1.1  dyoung 	 *
    756   1.1  dyoung 	 * XXX what if we have stations already associated???
    757   1.1  dyoung 	 * XXX probably not right for autoselect?
    758   1.1  dyoung 	 */
    759   1.8  dyoung 	if (ic->ic_caps & IEEE80211_C_SHPREAMBLE)
    760   1.8  dyoung 		ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
    761   1.1  dyoung 	if (mode == IEEE80211_MODE_11G) {
    762   1.1  dyoung 		if (ic->ic_caps & IEEE80211_C_SHSLOT)
    763   1.1  dyoung 			ic->ic_flags |= IEEE80211_F_SHSLOT;
    764   1.1  dyoung 		ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
    765   1.1  dyoung 			IEEE80211_MODE_11G);
    766   1.1  dyoung 	} else {
    767   1.8  dyoung 		ic->ic_flags &= ~IEEE80211_F_SHSLOT;
    768   1.1  dyoung 	}
    769   1.1  dyoung 
    770   1.1  dyoung 	ic->ic_curmode = mode;
    771   1.1  dyoung 	return 0;
    772   1.1  dyoung #undef N
    773   1.1  dyoung }
    774   1.1  dyoung 
    775   1.1  dyoung /*
    776   1.1  dyoung  * Return the phy mode for with the specified channel so the
    777   1.1  dyoung  * caller can select a rate set.  This is problematic and the
    778   1.1  dyoung  * work here assumes how things work elsewhere in this code.
    779   1.5  dyoung  *
    780   1.5  dyoung  * XXX never returns turbo modes -dcy
    781   1.1  dyoung  */
    782   1.1  dyoung enum ieee80211_phymode
    783   1.1  dyoung ieee80211_chan2mode(struct ieee80211com *ic, struct ieee80211_channel *chan)
    784   1.1  dyoung {
    785   1.1  dyoung 	/*
    786   1.1  dyoung 	 * NB: this assumes the channel would not be supplied to us
    787   1.1  dyoung 	 *     unless it was already compatible with the current mode.
    788   1.1  dyoung 	 */
    789   1.1  dyoung 	if (ic->ic_curmode != IEEE80211_MODE_AUTO)
    790   1.1  dyoung 		return ic->ic_curmode;
    791   1.1  dyoung 	/*
    792   1.1  dyoung 	 * In autoselect mode; deduce a mode based on the channel
    793   1.1  dyoung 	 * characteristics.  We assume that turbo-only channels
    794   1.1  dyoung 	 * are not considered when the channel set is constructed.
    795   1.1  dyoung 	 */
    796   1.1  dyoung 	if (IEEE80211_IS_CHAN_5GHZ(chan))
    797   1.1  dyoung 		return IEEE80211_MODE_11A;
    798   1.5  dyoung 	else if (IEEE80211_IS_CHAN_FHSS(chan))
    799   1.5  dyoung 		return IEEE80211_MODE_FH;
    800   1.1  dyoung 	else if (chan->ic_flags & (IEEE80211_CHAN_OFDM|IEEE80211_CHAN_DYN))
    801   1.1  dyoung 		return IEEE80211_MODE_11G;
    802   1.1  dyoung 	else
    803   1.1  dyoung 		return IEEE80211_MODE_11B;
    804   1.1  dyoung }
    805   1.1  dyoung 
    806   1.1  dyoung /*
    807   1.1  dyoung  * convert IEEE80211 rate value to ifmedia subtype.
    808   1.1  dyoung  * ieee80211 rate is in unit of 0.5Mbps.
    809   1.1  dyoung  */
    810   1.1  dyoung int
    811   1.1  dyoung ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
    812   1.1  dyoung {
    813   1.1  dyoung #define	N(a)	(sizeof(a) / sizeof(a[0]))
    814   1.1  dyoung 	static const struct {
    815   1.1  dyoung 		u_int	m;	/* rate + mode */
    816   1.1  dyoung 		u_int	r;	/* if_media rate */
    817   1.1  dyoung 	} rates[] = {
    818   1.5  dyoung 		{   2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
    819   1.5  dyoung 		{   4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
    820   1.5  dyoung 		{   2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
    821   1.5  dyoung 		{   4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
    822   1.5  dyoung 		{  11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
    823   1.5  dyoung 		{  22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
    824   1.5  dyoung 		{  44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
    825   1.5  dyoung 		{  12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
    826   1.5  dyoung 		{  18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
    827   1.5  dyoung 		{  24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
    828   1.5  dyoung 		{  36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
    829   1.5  dyoung 		{  48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
    830   1.5  dyoung 		{  72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
    831   1.5  dyoung 		{  96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
    832   1.5  dyoung 		{ 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
    833   1.5  dyoung 		{   2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
    834   1.5  dyoung 		{   4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
    835   1.5  dyoung 		{  11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
    836   1.5  dyoung 		{  22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
    837   1.5  dyoung 		{  12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
    838   1.5  dyoung 		{  18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
    839   1.5  dyoung 		{  24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
    840   1.5  dyoung 		{  36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
    841   1.5  dyoung 		{  48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
    842   1.5  dyoung 		{  72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
    843   1.5  dyoung 		{  96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
    844   1.5  dyoung 		{ 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
    845   1.1  dyoung 		/* NB: OFDM72 doesn't realy exist so we don't handle it */
    846   1.1  dyoung 	};
    847   1.1  dyoung 	u_int mask, i;
    848   1.1  dyoung 
    849   1.1  dyoung 	mask = rate & IEEE80211_RATE_VAL;
    850   1.1  dyoung 	switch (mode) {
    851   1.1  dyoung 	case IEEE80211_MODE_11A:
    852   1.1  dyoung 	case IEEE80211_MODE_TURBO:
    853   1.5  dyoung 		mask |= IFM_IEEE80211_11A;
    854   1.1  dyoung 		break;
    855   1.1  dyoung 	case IEEE80211_MODE_11B:
    856   1.5  dyoung 		mask |= IFM_IEEE80211_11B;
    857   1.5  dyoung 		break;
    858   1.5  dyoung 	case IEEE80211_MODE_FH:
    859   1.5  dyoung 		mask |= IFM_IEEE80211_FH;
    860   1.5  dyoung 		break;
    861   1.1  dyoung 	case IEEE80211_MODE_AUTO:
    862  1.10  dyoung 		/* NB: ic may be NULL for some drivers */
    863  1.10  dyoung 		if (ic && ic->ic_phytype == IEEE80211_T_FH) {
    864   1.5  dyoung 			mask |= IFM_IEEE80211_FH;
    865   1.5  dyoung 			break;
    866   1.1  dyoung 		}
    867  1.10  dyoung 		/* NB: hack, 11g matches both 11b+11a rates */
    868  1.10  dyoung 		/* fall thru... */
    869  1.10  dyoung 	case IEEE80211_MODE_11G:
    870  1.10  dyoung 		mask |= IFM_IEEE80211_11G;
    871  1.10  dyoung 		break;
    872   1.1  dyoung 	}
    873   1.1  dyoung 	for (i = 0; i < N(rates); i++)
    874   1.1  dyoung 		if (rates[i].m == mask)
    875   1.1  dyoung 			return rates[i].r;
    876   1.1  dyoung 	return IFM_AUTO;
    877   1.1  dyoung #undef N
    878   1.1  dyoung }
    879   1.1  dyoung 
    880   1.1  dyoung int
    881   1.1  dyoung ieee80211_media2rate(int mword)
    882   1.1  dyoung {
    883   1.1  dyoung #define	N(a)	(sizeof(a) / sizeof(a[0]))
    884   1.5  dyoung 	int i;
    885   1.5  dyoung 	static const struct {
    886   1.5  dyoung 		int subtype;
    887   1.5  dyoung 		int rate;
    888   1.5  dyoung 	} ieeerates[] = {
    889   1.5  dyoung 		{ IFM_AUTO,		-1	},
    890   1.5  dyoung 		{ IFM_MANUAL,		0	},
    891   1.5  dyoung 		{ IFM_NONE,		0	},
    892   1.5  dyoung 		{ IFM_IEEE80211_FH1,	2	},
    893   1.5  dyoung 		{ IFM_IEEE80211_FH2,	4	},
    894   1.5  dyoung 		{ IFM_IEEE80211_DS1,	2	},
    895   1.5  dyoung 		{ IFM_IEEE80211_DS2,	4	},
    896   1.5  dyoung 		{ IFM_IEEE80211_DS5,	11	},
    897   1.5  dyoung 		{ IFM_IEEE80211_DS11,	22	},
    898   1.5  dyoung 		{ IFM_IEEE80211_DS22,	44	},
    899   1.5  dyoung 		{ IFM_IEEE80211_OFDM6,	12	},
    900   1.5  dyoung 		{ IFM_IEEE80211_OFDM9,	18	},
    901   1.5  dyoung 		{ IFM_IEEE80211_OFDM12,	24	},
    902   1.5  dyoung 		{ IFM_IEEE80211_OFDM18,	36	},
    903   1.5  dyoung 		{ IFM_IEEE80211_OFDM24,	48	},
    904   1.5  dyoung 		{ IFM_IEEE80211_OFDM36,	72	},
    905   1.5  dyoung 		{ IFM_IEEE80211_OFDM48,	96	},
    906   1.5  dyoung 		{ IFM_IEEE80211_OFDM54,	108	},
    907   1.5  dyoung 		{ IFM_IEEE80211_OFDM72,	144	},
    908   1.1  dyoung 	};
    909   1.5  dyoung 	for (i = 0; i < N(ieeerates); i++) {
    910   1.5  dyoung 		if (ieeerates[i].subtype == IFM_SUBTYPE(mword))
    911   1.5  dyoung 			return ieeerates[i].rate;
    912   1.5  dyoung 	}
    913   1.5  dyoung 	return 0;
    914   1.1  dyoung #undef N
    915   1.1  dyoung }
    916   1.1  dyoung 
    917  1.11  dyoung #ifdef __NetBSD__
    918  1.11  dyoung /* TBD factor with sysctl_ath_verify. */
    919  1.11  dyoung static int
    920  1.11  dyoung sysctl_ieee80211_verify(SYSCTLFN_ARGS)
    921  1.11  dyoung {
    922  1.11  dyoung 	int error, t;
    923  1.11  dyoung 	struct sysctlnode node;
    924  1.11  dyoung 
    925  1.11  dyoung 	node = *rnode;
    926  1.11  dyoung 	t = *(int*)rnode->sysctl_data;
    927  1.11  dyoung 	node.sysctl_data = &t;
    928  1.11  dyoung 	error = sysctl_lookup(SYSCTLFN_CALL(&node));
    929  1.11  dyoung 	if (error || newp == NULL)
    930  1.11  dyoung 		return (error);
    931  1.11  dyoung 
    932  1.11  dyoung 	IEEE80211_DPRINTF(("%s: t = %d, nodenum = %d, rnodenum = %d\n",
    933  1.11  dyoung 	    __func__, t, node.sysctl_num, rnode->sysctl_num));
    934  1.11  dyoung 
    935  1.11  dyoung 	if (node.sysctl_num == ieee80211_inact_max_nodenum) {
    936  1.11  dyoung 		if (t < 0)
    937  1.11  dyoung 			return (EINVAL);
    938  1.11  dyoung #ifdef IEEE80211_DEBUG
    939  1.11  dyoung 	} else if (node.sysctl_num == ieee80211_debug_nodenum) {
    940  1.11  dyoung 		if (t < 0 || t > 2)
    941  1.11  dyoung 			return (EINVAL);
    942  1.11  dyoung #endif /* IEEE80211_DEBUG */
    943  1.11  dyoung 	} else
    944  1.11  dyoung 		return (EINVAL);
    945  1.11  dyoung 
    946  1.11  dyoung 	*(int*)rnode->sysctl_data = t;
    947  1.11  dyoung 
    948  1.11  dyoung 	return (0);
    949  1.11  dyoung }
    950  1.11  dyoung 
    951  1.11  dyoung /*
    952  1.11  dyoung  * Setup sysctl(3) MIB, net.ieee80211.*
    953  1.11  dyoung  *
    954  1.11  dyoung  * TBD condition CTLFLAG_PERMANENT on being an LKM or not
    955  1.11  dyoung  */
    956  1.11  dyoung SYSCTL_SETUP(sysctl_ieee80211, "sysctl ieee80211 subtree setup")
    957  1.11  dyoung {
    958  1.12  dyoung 	int rc;
    959  1.12  dyoung 	struct sysctlnode *cnode, *rnode;
    960  1.11  dyoung 
    961  1.12  dyoung 	if ((rc = sysctl_createv(clog, 0, NULL, &rnode,
    962  1.11  dyoung 	    CTLFLAG_PERMANENT, CTLTYPE_NODE, "net", NULL,
    963  1.11  dyoung 	    NULL, 0, NULL, 0, CTL_NET, CTL_EOL)) != 0)
    964  1.11  dyoung 		goto err;
    965  1.11  dyoung 
    966  1.12  dyoung 	if ((rc = sysctl_createv(clog, 0, &rnode, &rnode,
    967  1.12  dyoung 	    CTLFLAG_PERMANENT, CTLTYPE_NODE, "link", NULL,
    968  1.12  dyoung 	    NULL, 0, NULL, 0, PF_LINK, CTL_EOL)) != 0)
    969  1.12  dyoung 		goto err;
    970  1.12  dyoung 
    971  1.12  dyoung 	if ((rc = sysctl_createv(clog, 0, &rnode, &rnode,
    972  1.11  dyoung 	    CTLFLAG_PERMANENT, CTLTYPE_NODE, "ieee80211", NULL,
    973  1.12  dyoung 	    NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0)
    974  1.11  dyoung 		goto err;
    975  1.11  dyoung 
    976  1.11  dyoung #ifdef IEEE80211_DEBUG
    977  1.11  dyoung 
    978  1.11  dyoung 	/* control debugging printfs */
    979  1.12  dyoung 	if ((rc = sysctl_createv(clog, 0, &rnode, &cnode,
    980  1.11  dyoung 	    CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
    981  1.11  dyoung 	    "debug", NULL, sysctl_ieee80211_verify, 0, &ieee80211_debug, 0,
    982  1.12  dyoung 	    CTL_CREATE, CTL_EOL)) != 0)
    983  1.11  dyoung 		goto err;
    984  1.11  dyoung 
    985  1.12  dyoung 	ieee80211_debug_nodenum = cnode->sysctl_num;
    986  1.11  dyoung 
    987  1.11  dyoung #endif /* IEEE80211_DEBUG */
    988  1.11  dyoung 
    989  1.11  dyoung 	/* control inactivity timer */
    990  1.12  dyoung 	if ((rc = sysctl_createv(clog, 0, &rnode, &cnode,
    991  1.11  dyoung 	    CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
    992  1.11  dyoung 	    "maxinact", NULL, sysctl_ieee80211_verify, 0, &ieee80211_inact_max,
    993  1.12  dyoung 	    0, CTL_CREATE, CTL_EOL)) != 0)
    994  1.11  dyoung 		goto err;
    995  1.11  dyoung 
    996  1.12  dyoung 	ieee80211_inact_max_nodenum = cnode->sysctl_num;
    997  1.11  dyoung 
    998  1.11  dyoung 	return;
    999  1.11  dyoung err:
   1000  1.11  dyoung 	printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
   1001  1.11  dyoung }
   1002  1.11  dyoung #endif /* __NetBSD__ */
   1003  1.11  dyoung 
   1004   1.2  dyoung #ifdef __FreeBSD__
   1005   1.1  dyoung /*
   1006   1.1  dyoung  * Module glue.
   1007   1.1  dyoung  *
   1008   1.1  dyoung  * NB: the module name is "wlan" for compatibility with NetBSD.
   1009   1.1  dyoung  */
   1010   1.1  dyoung 
   1011   1.1  dyoung static int
   1012   1.1  dyoung ieee80211_modevent(module_t mod, int type, void *unused)
   1013   1.1  dyoung {
   1014   1.1  dyoung 	switch (type) {
   1015   1.1  dyoung 	case MOD_LOAD:
   1016   1.1  dyoung 		if (bootverbose)
   1017   1.1  dyoung 			printf("wlan: <802.11 Link Layer>\n");
   1018   1.1  dyoung 		return 0;
   1019   1.1  dyoung 	case MOD_UNLOAD:
   1020   1.1  dyoung 		return 0;
   1021   1.1  dyoung 	}
   1022   1.1  dyoung 	return EINVAL;
   1023   1.1  dyoung }
   1024   1.1  dyoung 
   1025   1.1  dyoung static moduledata_t ieee80211_mod = {
   1026   1.1  dyoung 	"wlan",
   1027   1.1  dyoung 	ieee80211_modevent,
   1028   1.1  dyoung 	0
   1029   1.1  dyoung };
   1030   1.1  dyoung DECLARE_MODULE(wlan, ieee80211_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
   1031   1.1  dyoung MODULE_VERSION(wlan, 1);
   1032   1.1  dyoung MODULE_DEPEND(wlan, rc4, 1, 1, 1);
   1033  1.10  dyoung MODULE_DEPEND(wlan, ether, 1, 1, 1);
   1034   1.2  dyoung #endif
   1035