1068 lines
29 KiB
C
1068 lines
29 KiB
C
/* $NetBSD: ieee80211.c,v 1.45 2006/03/08 23:46:27 lukem Exp $ */
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/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifdef __FreeBSD__
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__FBSDID("$FreeBSD: src/sys/net80211/ieee80211.c,v 1.22 2005/08/10 16:22:29 sam Exp $");
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#endif
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#ifdef __NetBSD__
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__KERNEL_RCSID(0, "$NetBSD: ieee80211.c,v 1.45 2006/03/08 23:46:27 lukem Exp $");
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#endif
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/*
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* IEEE 802.11 generic handler
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*/
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#include "opt_inet.h"
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#include "bpfilter.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_arp.h>
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#include <net/if_ether.h>
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#include <net/if_llc.h>
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#include <net80211/ieee80211_netbsd.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_sysctl.h>
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#include <net/bpf.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <net/if_ether.h>
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#endif
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struct ieee80211com_head ieee80211com_head =
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LIST_HEAD_INITIALIZER(ieee80211com_head);
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const char *ieee80211_phymode_name[] = {
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"auto", /* IEEE80211_MODE_AUTO */
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"11a", /* IEEE80211_MODE_11A */
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"11b", /* IEEE80211_MODE_11B */
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"11g", /* IEEE80211_MODE_11G */
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"FH", /* IEEE80211_MODE_FH */
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"turboA", /* IEEE80211_MODE_TURBO_A */
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"turboG", /* IEEE80211_MODE_TURBO_G */
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};
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/* list of all instances */
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SLIST_HEAD(ieee80211_list, ieee80211com);
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static struct ieee80211_list ieee80211_list =
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SLIST_HEAD_INITIALIZER(ieee80211_list);
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static u_int8_t ieee80211_vapmap[32]; /* enough for 256 */
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static void
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ieee80211_add_vap(struct ieee80211com *ic)
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{
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#define N(a) (sizeof(a)/sizeof(a[0]))
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int i;
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int s;
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u_int8_t b;
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s = splnet();
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ic->ic_vap = 0;
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for (i = 0; i < N(ieee80211_vapmap) && ieee80211_vapmap[i] == 0xff; i++)
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ic->ic_vap += NBBY;
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if (i == N(ieee80211_vapmap))
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panic("vap table full");
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for (b = ieee80211_vapmap[i]; b & 1; b >>= 1)
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ic->ic_vap++;
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setbit(ieee80211_vapmap, ic->ic_vap);
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SLIST_INSERT_HEAD(&ieee80211_list, ic, ic_next);
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splx(s);
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#undef N
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}
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static void
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ieee80211_remove_vap(struct ieee80211com *ic)
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{
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int s;
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s = splnet();
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SLIST_REMOVE(&ieee80211_list, ic, ieee80211com, ic_next);
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IASSERT(ic->ic_vap < sizeof(ieee80211_vapmap)*NBBY,
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("invalid vap id %d", ic->ic_vap));
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IASSERT(isset(ieee80211_vapmap, ic->ic_vap),
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("vap id %d not allocated", ic->ic_vap));
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clrbit(ieee80211_vapmap, ic->ic_vap);
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splx(s);
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}
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/*
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* Default reset method for use with the ioctl support. This
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* method is invoked after any state change in the 802.11
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* layer that should be propagated to the hardware but not
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* require re-initialization of the 802.11 state machine (e.g
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* rescanning for an ap). We always return ENETRESET which
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* should cause the driver to re-initialize the device. Drivers
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* can override this method to implement more optimized support.
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*/
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static int
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ieee80211_default_reset(struct ifnet *ifp)
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{
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return ENETRESET;
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}
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void
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ieee80211_ifattach(struct ieee80211com *ic)
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{
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struct ifnet *ifp = ic->ic_ifp;
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struct ieee80211_channel *c;
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int i;
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#ifdef __NetBSD__
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ieee80211_init();
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#endif /* __NetBSD__ */
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ether_ifattach(ifp, ic->ic_myaddr);
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#if NBPFILTER > 0
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bpfattach2(ifp, DLT_IEEE802_11,
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sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf);
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#endif
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ieee80211_crypto_attach(ic);
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/*
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* Fill in 802.11 available channel set, mark
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* all available channels as active, and pick
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* a default channel if not already specified.
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*/
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memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
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ic->ic_modecaps |= 1<<IEEE80211_MODE_AUTO;
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for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
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c = &ic->ic_channels[i];
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if (c->ic_flags) {
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/*
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* Verify driver passed us valid data.
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*/
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if (i != ieee80211_chan2ieee(ic, c)) {
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if_printf(ifp, "bad channel ignored; "
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"freq %u flags %x number %u\n",
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c->ic_freq, c->ic_flags, i);
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c->ic_flags = 0; /* NB: remove */
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continue;
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}
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setbit(ic->ic_chan_avail, i);
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/*
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* Identify mode capabilities.
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*/
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if (IEEE80211_IS_CHAN_A(c))
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ic->ic_modecaps |= 1<<IEEE80211_MODE_11A;
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if (IEEE80211_IS_CHAN_B(c))
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ic->ic_modecaps |= 1<<IEEE80211_MODE_11B;
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if (IEEE80211_IS_CHAN_PUREG(c))
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ic->ic_modecaps |= 1<<IEEE80211_MODE_11G;
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if (IEEE80211_IS_CHAN_FHSS(c))
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ic->ic_modecaps |= 1<<IEEE80211_MODE_FH;
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if (IEEE80211_IS_CHAN_T(c))
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ic->ic_modecaps |= 1<<IEEE80211_MODE_TURBO_A;
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if (IEEE80211_IS_CHAN_108G(c))
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ic->ic_modecaps |= 1<<IEEE80211_MODE_TURBO_G;
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if (ic->ic_curchan == NULL) {
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/* arbitrarily pick the first channel */
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ic->ic_curchan = &ic->ic_channels[i];
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}
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}
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}
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/* validate ic->ic_curmode */
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if ((ic->ic_modecaps & (1<<ic->ic_curmode)) == 0)
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ic->ic_curmode = IEEE80211_MODE_AUTO;
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ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
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#if 0
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/*
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* Enable WME by default if we're capable.
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*/
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if (ic->ic_caps & IEEE80211_C_WME)
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ic->ic_flags |= IEEE80211_F_WME;
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#endif
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(void) ieee80211_setmode(ic, ic->ic_curmode);
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if (ic->ic_bintval == 0)
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ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
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ic->ic_bmisstimeout = 7*ic->ic_bintval; /* default 7 beacons */
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ic->ic_dtim_period = IEEE80211_DTIM_DEFAULT;
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IEEE80211_BEACON_LOCK_INIT(ic, "beacon");
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if (ic->ic_lintval == 0)
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ic->ic_lintval = ic->ic_bintval;
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ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
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LIST_INSERT_HEAD(&ieee80211com_head, ic, ic_list);
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ieee80211_node_attach(ic);
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ieee80211_proto_attach(ic);
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ieee80211_add_vap(ic);
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ieee80211_sysctl_attach(ic); /* NB: requires ic_vap */
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/*
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* Install a default reset method for the ioctl support.
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* The driver is expected to fill this in before calling us.
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*/
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if (ic->ic_reset == NULL)
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ic->ic_reset = ieee80211_default_reset;
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}
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void
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ieee80211_ifdetach(struct ieee80211com *ic)
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{
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struct ifnet *ifp = ic->ic_ifp;
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ieee80211_remove_vap(ic);
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ieee80211_sysctl_detach(ic);
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ieee80211_proto_detach(ic);
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ieee80211_crypto_detach(ic);
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ieee80211_node_detach(ic);
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LIST_REMOVE(ic, ic_list);
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ifmedia_delete_instance(&ic->ic_media, IFM_INST_ANY);
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IEEE80211_BEACON_LOCK_DESTROY(ic);
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#if NBPFILTER > 0
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bpfdetach(ifp);
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#endif
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ether_ifdetach(ifp);
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}
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/*
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* Convert MHz frequency to IEEE channel number.
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*/
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u_int
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ieee80211_mhz2ieee(u_int freq, u_int flags)
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{
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if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
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if (freq == 2484)
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return 14;
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if (freq < 2484)
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return (freq - 2407) / 5;
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else
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return 15 + ((freq - 2512) / 20);
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} else if (flags & IEEE80211_CHAN_5GHZ) { /* 5 GHz band */
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return (freq - 5000) / 5;
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} else { /* either, guess */
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if (freq == 2484)
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return 14;
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if (freq < 2484)
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return (freq - 2407) / 5;
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if (freq < 5000)
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return 15 + ((freq - 2512) / 20);
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return (freq - 5000) / 5;
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}
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}
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/*
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* Convert channel to IEEE channel number.
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*/
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u_int
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ieee80211_chan2ieee(struct ieee80211com *ic, struct ieee80211_channel *c)
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{
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if (ic->ic_channels <= c && c <= &ic->ic_channels[IEEE80211_CHAN_MAX])
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return c - ic->ic_channels;
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else if (c == IEEE80211_CHAN_ANYC)
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return IEEE80211_CHAN_ANY;
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else if (c != NULL) {
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if_printf(ic->ic_ifp, "invalid channel freq %u flags %x\n",
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c->ic_freq, c->ic_flags);
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return 0; /* XXX */
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} else {
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if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
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return 0; /* XXX */
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}
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}
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/*
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* Convert IEEE channel number to MHz frequency.
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*/
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u_int
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ieee80211_ieee2mhz(u_int chan, u_int flags)
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{
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if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
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if (chan == 14)
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return 2484;
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if (chan < 14)
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return 2407 + chan*5;
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else
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return 2512 + ((chan-15)*20);
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} else if (flags & IEEE80211_CHAN_5GHZ) {/* 5 GHz band */
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return 5000 + (chan*5);
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} else { /* either, guess */
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if (chan == 14)
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return 2484;
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if (chan < 14) /* 0-13 */
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return 2407 + chan*5;
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if (chan < 27) /* 15-26 */
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return 2512 + ((chan-15)*20);
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return 5000 + (chan*5);
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}
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}
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/*
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* Setup the media data structures according to the channel and
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* rate tables. This must be called by the driver after
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* ieee80211_attach and before most anything else.
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*/
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void
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ieee80211_media_init(struct ieee80211com *ic,
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ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
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{
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#define ADD(_ic, _s, _o) \
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ifmedia_add(&(_ic)->ic_media, \
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IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
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struct ifnet *ifp = ic->ic_ifp;
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struct ifmediareq imr;
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int i, j, mode, rate, maxrate, mword, mopt, r;
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struct ieee80211_rateset *rs;
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struct ieee80211_rateset allrates;
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/*
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* Do late attach work that must wait for any subclass
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* (i.e. driver) work such as overriding methods.
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*/
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ieee80211_node_lateattach(ic);
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#ifdef IEEE80211_NO_HOSTAP
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ic->ic_caps &= ~IEEE80211_C_HOSTAP;
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#endif /* IEEE80211_NO_HOSTAP */
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/*
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* Fill in media characteristics.
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*/
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ifmedia_init(&ic->ic_media, 0, media_change, media_stat);
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maxrate = 0;
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memset(&allrates, 0, sizeof(allrates));
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for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_MAX; mode++) {
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static const u_int mopts[] = {
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IFM_AUTO,
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IFM_IEEE80211_11A,
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IFM_IEEE80211_11B,
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IFM_IEEE80211_11G,
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IFM_IEEE80211_FH,
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IFM_IEEE80211_11A | IFM_IEEE80211_TURBO,
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IFM_IEEE80211_11G | IFM_IEEE80211_TURBO,
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};
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if ((ic->ic_modecaps & (1<<mode)) == 0)
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continue;
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mopt = mopts[mode];
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ADD(ic, IFM_AUTO, mopt); /* e.g. 11a auto */
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if (ic->ic_caps & IEEE80211_C_IBSS)
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ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC);
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if (ic->ic_caps & IEEE80211_C_HOSTAP)
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ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_HOSTAP);
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if (ic->ic_caps & IEEE80211_C_AHDEMO)
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ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
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if (ic->ic_caps & IEEE80211_C_MONITOR)
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ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_MONITOR);
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if (mode == IEEE80211_MODE_AUTO)
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continue;
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rs = &ic->ic_sup_rates[mode];
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for (i = 0; i < rs->rs_nrates; i++) {
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rate = rs->rs_rates[i];
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mword = ieee80211_rate2media(ic, rate, mode);
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if (mword == 0)
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continue;
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ADD(ic, mword, mopt);
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if (ic->ic_caps & IEEE80211_C_IBSS)
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ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC);
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if (ic->ic_caps & IEEE80211_C_HOSTAP)
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ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP);
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if (ic->ic_caps & IEEE80211_C_AHDEMO)
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ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
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if (ic->ic_caps & IEEE80211_C_MONITOR)
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ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR);
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/*
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* Add rate to the collection of all rates.
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*/
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r = rate & IEEE80211_RATE_VAL;
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for (j = 0; j < allrates.rs_nrates; j++)
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if (allrates.rs_rates[j] == r)
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break;
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if (j == allrates.rs_nrates) {
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/* unique, add to the set */
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allrates.rs_rates[j] = r;
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allrates.rs_nrates++;
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}
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rate = (rate & IEEE80211_RATE_VAL) / 2;
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if (rate > maxrate)
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maxrate = rate;
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}
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}
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for (i = 0; i < allrates.rs_nrates; i++) {
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mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
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IEEE80211_MODE_AUTO);
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if (mword == 0)
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continue;
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mword = IFM_SUBTYPE(mword); /* remove media options */
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ADD(ic, mword, 0);
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if (ic->ic_caps & IEEE80211_C_IBSS)
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ADD(ic, mword, IFM_IEEE80211_ADHOC);
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if (ic->ic_caps & IEEE80211_C_HOSTAP)
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ADD(ic, mword, IFM_IEEE80211_HOSTAP);
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if (ic->ic_caps & IEEE80211_C_AHDEMO)
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ADD(ic, mword, IFM_IEEE80211_ADHOC | IFM_FLAG0);
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if (ic->ic_caps & IEEE80211_C_MONITOR)
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ADD(ic, mword, IFM_IEEE80211_MONITOR);
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}
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ieee80211_media_status(ifp, &imr);
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ifmedia_set(&ic->ic_media, imr.ifm_active);
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if (maxrate)
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ifp->if_baudrate = IF_Mbps(maxrate);
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#undef ADD
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}
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void
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ieee80211_announce(struct ieee80211com *ic)
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{
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struct ifnet *ifp = ic->ic_ifp;
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int i, mode, rate, mword;
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struct ieee80211_rateset *rs;
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for (mode = IEEE80211_MODE_11A; mode < IEEE80211_MODE_MAX; mode++) {
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if ((ic->ic_modecaps & (1<<mode)) == 0)
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continue;
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|
if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
|
|
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;
|
|
printf("%s%d%sMbps", (i != 0 ? " " : ""),
|
|
(rate & IEEE80211_RATE_VAL) / 2,
|
|
((rate & 0x1) != 0 ? ".5" : ""));
|
|
}
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
static int
|
|
findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
|
|
{
|
|
#define IEEERATE(_ic,_m,_i) \
|
|
((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL)
|
|
int i, nrates = ic->ic_sup_rates[mode].rs_nrates;
|
|
for (i = 0; i < nrates; i++)
|
|
if (IEEERATE(ic, mode, i) == rate)
|
|
return i;
|
|
return -1;
|
|
#undef IEEERATE
|
|
}
|
|
|
|
/*
|
|
* Find an instance by it's mac address.
|
|
*/
|
|
struct ieee80211com *
|
|
ieee80211_find_vap(const u_int8_t mac[IEEE80211_ADDR_LEN])
|
|
{
|
|
int s;
|
|
struct ieee80211com *ic;
|
|
|
|
s = splnet();
|
|
SLIST_FOREACH(ic, &ieee80211_list, ic_next)
|
|
if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr))
|
|
break;
|
|
splx(s);
|
|
return ic;
|
|
}
|
|
|
|
static struct ieee80211com *
|
|
ieee80211_find_instance(struct ifnet *ifp)
|
|
{
|
|
int s;
|
|
struct ieee80211com *ic;
|
|
|
|
s = splnet();
|
|
/* XXX not right for multiple instances but works for now */
|
|
SLIST_FOREACH(ic, &ieee80211_list, ic_next)
|
|
if (ic->ic_ifp == ifp)
|
|
break;
|
|
splx(s);
|
|
return ic;
|
|
}
|
|
|
|
/*
|
|
* Handle a media change request.
|
|
*/
|
|
int
|
|
ieee80211_media_change(struct ifnet *ifp)
|
|
{
|
|
struct ieee80211com *ic;
|
|
struct ifmedia_entry *ime;
|
|
enum ieee80211_opmode newopmode;
|
|
enum ieee80211_phymode newphymode;
|
|
int i, j, newrate, error = 0;
|
|
|
|
ic = ieee80211_find_instance(ifp);
|
|
if (!ic) {
|
|
if_printf(ifp, "%s: no 802.11 instance!\n", __func__);
|
|
return EINVAL;
|
|
}
|
|
ime = ic->ic_media.ifm_cur;
|
|
/*
|
|
* First, identify the phy mode.
|
|
*/
|
|
switch (IFM_MODE(ime->ifm_media)) {
|
|
case IFM_IEEE80211_11A:
|
|
newphymode = IEEE80211_MODE_11A;
|
|
break;
|
|
case IFM_IEEE80211_11B:
|
|
newphymode = IEEE80211_MODE_11B;
|
|
break;
|
|
case IFM_IEEE80211_11G:
|
|
newphymode = IEEE80211_MODE_11G;
|
|
break;
|
|
case IFM_IEEE80211_FH:
|
|
newphymode = IEEE80211_MODE_FH;
|
|
break;
|
|
case IFM_AUTO:
|
|
newphymode = IEEE80211_MODE_AUTO;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
/*
|
|
* Turbo mode is an ``option''.
|
|
* XXX does not apply to AUTO
|
|
*/
|
|
if (ime->ifm_media & IFM_IEEE80211_TURBO) {
|
|
if (newphymode == IEEE80211_MODE_11A)
|
|
newphymode = IEEE80211_MODE_TURBO_A;
|
|
else if (newphymode == IEEE80211_MODE_11G)
|
|
newphymode = IEEE80211_MODE_TURBO_G;
|
|
else
|
|
return EINVAL;
|
|
}
|
|
/*
|
|
* Validate requested mode is available.
|
|
*/
|
|
if ((ic->ic_modecaps & (1<<newphymode)) == 0)
|
|
return EINVAL;
|
|
|
|
/*
|
|
* Next, the fixed/variable rate.
|
|
*/
|
|
i = -1;
|
|
if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
|
|
/*
|
|
* Convert media subtype to rate.
|
|
*/
|
|
newrate = ieee80211_media2rate(ime->ifm_media);
|
|
if (newrate == 0)
|
|
return EINVAL;
|
|
/*
|
|
* Check the rate table for the specified/current phy.
|
|
*/
|
|
if (newphymode == IEEE80211_MODE_AUTO) {
|
|
/*
|
|
* In autoselect mode search for the rate.
|
|
*/
|
|
for (j = IEEE80211_MODE_11A;
|
|
j < IEEE80211_MODE_MAX; j++) {
|
|
if ((ic->ic_modecaps & (1<<j)) == 0)
|
|
continue;
|
|
i = findrate(ic, j, newrate);
|
|
if (i != -1) {
|
|
/* lock mode too */
|
|
newphymode = j;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
i = findrate(ic, newphymode, newrate);
|
|
}
|
|
if (i == -1) /* mode/rate mismatch */
|
|
return EINVAL;
|
|
}
|
|
/* NB: defer rate setting to later */
|
|
|
|
/*
|
|
* Deduce new operating mode but don't install it just yet.
|
|
*/
|
|
if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) ==
|
|
(IFM_IEEE80211_ADHOC|IFM_FLAG0))
|
|
newopmode = IEEE80211_M_AHDEMO;
|
|
else if (ime->ifm_media & IFM_IEEE80211_HOSTAP)
|
|
newopmode = IEEE80211_M_HOSTAP;
|
|
else if (ime->ifm_media & IFM_IEEE80211_ADHOC)
|
|
newopmode = IEEE80211_M_IBSS;
|
|
else if (ime->ifm_media & IFM_IEEE80211_MONITOR)
|
|
newopmode = IEEE80211_M_MONITOR;
|
|
else
|
|
newopmode = IEEE80211_M_STA;
|
|
|
|
#ifndef IEEE80211_NO_HOSTAP
|
|
/*
|
|
* Autoselect doesn't make sense when operating as an AP.
|
|
* If no phy mode has been selected, pick one and lock it
|
|
* down so rate tables can be used in forming beacon frames
|
|
* and the like.
|
|
*/
|
|
if (newopmode == IEEE80211_M_HOSTAP &&
|
|
newphymode == IEEE80211_MODE_AUTO) {
|
|
for (j = IEEE80211_MODE_11A; j < IEEE80211_MODE_MAX; j++)
|
|
if (ic->ic_modecaps & (1<<j)) {
|
|
newphymode = j;
|
|
break;
|
|
}
|
|
}
|
|
#endif /* !IEEE80211_NO_HOSTAP */
|
|
|
|
/*
|
|
* Handle phy mode change.
|
|
*/
|
|
if (ic->ic_curmode != newphymode) { /* change phy mode */
|
|
error = ieee80211_setmode(ic, newphymode);
|
|
if (error != 0)
|
|
return error;
|
|
error = ENETRESET;
|
|
}
|
|
|
|
/*
|
|
* Committed to changes, install the rate setting.
|
|
*/
|
|
if (ic->ic_fixed_rate != i) {
|
|
ic->ic_fixed_rate = i; /* set fixed tx rate */
|
|
error = ENETRESET;
|
|
}
|
|
|
|
/*
|
|
* Handle operating mode change.
|
|
*/
|
|
if (ic->ic_opmode != newopmode) {
|
|
ic->ic_opmode = newopmode;
|
|
switch (newopmode) {
|
|
case IEEE80211_M_AHDEMO:
|
|
case IEEE80211_M_HOSTAP:
|
|
case IEEE80211_M_STA:
|
|
case IEEE80211_M_MONITOR:
|
|
ic->ic_flags &= ~IEEE80211_F_IBSSON;
|
|
break;
|
|
case IEEE80211_M_IBSS:
|
|
ic->ic_flags |= IEEE80211_F_IBSSON;
|
|
break;
|
|
}
|
|
/*
|
|
* Yech, slot time may change depending on the
|
|
* operating mode so reset it to be sure everything
|
|
* is setup appropriately.
|
|
*/
|
|
ieee80211_reset_erp(ic);
|
|
ieee80211_wme_initparams(ic); /* after opmode change */
|
|
error = ENETRESET;
|
|
}
|
|
#ifdef notdef
|
|
if (error == 0)
|
|
ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
|
|
#endif
|
|
return error;
|
|
}
|
|
|
|
void
|
|
ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
|
|
{
|
|
struct ieee80211com *ic;
|
|
struct ieee80211_rateset *rs;
|
|
|
|
ic = ieee80211_find_instance(ifp);
|
|
if (!ic) {
|
|
if_printf(ifp, "%s: no 802.11 instance!\n", __func__);
|
|
return;
|
|
}
|
|
imr->ifm_status = IFM_AVALID;
|
|
imr->ifm_active = IFM_IEEE80211;
|
|
if (ic->ic_state == IEEE80211_S_RUN)
|
|
imr->ifm_status |= IFM_ACTIVE;
|
|
/*
|
|
* Calculate a current rate if possible.
|
|
*/
|
|
if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) {
|
|
/*
|
|
* A fixed rate is set, report that.
|
|
*/
|
|
rs = &ic->ic_sup_rates[ic->ic_curmode];
|
|
imr->ifm_active |= ieee80211_rate2media(ic,
|
|
rs->rs_rates[ic->ic_fixed_rate], ic->ic_curmode);
|
|
} else if (ic->ic_opmode == IEEE80211_M_STA) {
|
|
/*
|
|
* In station mode report the current transmit rate.
|
|
*/
|
|
rs = &ic->ic_bss->ni_rates;
|
|
imr->ifm_active |= ieee80211_rate2media(ic,
|
|
rs->rs_rates[ic->ic_bss->ni_txrate], ic->ic_curmode);
|
|
} else
|
|
imr->ifm_active |= IFM_AUTO;
|
|
switch (ic->ic_opmode) {
|
|
case IEEE80211_M_STA:
|
|
break;
|
|
case IEEE80211_M_IBSS:
|
|
imr->ifm_active |= IFM_IEEE80211_ADHOC;
|
|
break;
|
|
case IEEE80211_M_AHDEMO:
|
|
/* should not come here */
|
|
break;
|
|
case IEEE80211_M_HOSTAP:
|
|
imr->ifm_active |= IFM_IEEE80211_HOSTAP;
|
|
break;
|
|
case IEEE80211_M_MONITOR:
|
|
imr->ifm_active |= IFM_IEEE80211_MONITOR;
|
|
break;
|
|
}
|
|
switch (ic->ic_curmode) {
|
|
case IEEE80211_MODE_11A:
|
|
imr->ifm_active |= IFM_IEEE80211_11A;
|
|
break;
|
|
case IEEE80211_MODE_11B:
|
|
imr->ifm_active |= IFM_IEEE80211_11B;
|
|
break;
|
|
case IEEE80211_MODE_11G:
|
|
imr->ifm_active |= IFM_IEEE80211_11G;
|
|
break;
|
|
case IEEE80211_MODE_FH:
|
|
imr->ifm_active |= IFM_IEEE80211_FH;
|
|
break;
|
|
case IEEE80211_MODE_TURBO_A:
|
|
imr->ifm_active |= IFM_IEEE80211_11A
|
|
| IFM_IEEE80211_TURBO;
|
|
break;
|
|
case IEEE80211_MODE_TURBO_G:
|
|
imr->ifm_active |= IFM_IEEE80211_11G
|
|
| IFM_IEEE80211_TURBO;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
ieee80211_watchdog(struct ieee80211com *ic)
|
|
{
|
|
struct ieee80211_node_table *nt;
|
|
int need_inact_timer = 0;
|
|
|
|
if (ic->ic_state != IEEE80211_S_INIT) {
|
|
if (ic->ic_mgt_timer && --ic->ic_mgt_timer == 0)
|
|
ieee80211_new_state(ic, IEEE80211_S_SCAN, 0);
|
|
nt = &ic->ic_scan;
|
|
if (nt->nt_inact_timer) {
|
|
if (--nt->nt_inact_timer == 0)
|
|
nt->nt_timeout(nt);
|
|
need_inact_timer += nt->nt_inact_timer;
|
|
}
|
|
nt = &ic->ic_sta;
|
|
if (nt->nt_inact_timer) {
|
|
if (--nt->nt_inact_timer == 0)
|
|
nt->nt_timeout(nt);
|
|
need_inact_timer += nt->nt_inact_timer;
|
|
}
|
|
}
|
|
if (ic->ic_mgt_timer != 0 || need_inact_timer)
|
|
ic->ic_ifp->if_timer = 1;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
#define N(a) (sizeof(a) / sizeof(a[0]))
|
|
static const u_int chanflags[] = {
|
|
0, /* IEEE80211_MODE_AUTO */
|
|
IEEE80211_CHAN_A, /* IEEE80211_MODE_11A */
|
|
IEEE80211_CHAN_B, /* IEEE80211_MODE_11B */
|
|
IEEE80211_CHAN_PUREG, /* IEEE80211_MODE_11G */
|
|
IEEE80211_CHAN_FHSS, /* IEEE80211_MODE_FH */
|
|
IEEE80211_CHAN_T, /* IEEE80211_MODE_TURBO_A */
|
|
IEEE80211_CHAN_108G, /* IEEE80211_MODE_TURBO_G */
|
|
};
|
|
struct ieee80211_channel *c;
|
|
u_int modeflags;
|
|
int i;
|
|
|
|
/* validate new mode */
|
|
if ((ic->ic_modecaps & (1<<mode)) == 0) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
|
|
"%s: mode %u not supported (caps 0x%x)\n",
|
|
__func__, mode, ic->ic_modecaps);
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Verify at least one channel is present in the available
|
|
* channel list before committing to the new mode.
|
|
*/
|
|
IASSERT(mode < N(chanflags), ("Unexpected mode %u", mode));
|
|
modeflags = chanflags[mode];
|
|
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
|
|
c = &ic->ic_channels[i];
|
|
if (c->ic_flags == 0)
|
|
continue;
|
|
if (mode == IEEE80211_MODE_AUTO) {
|
|
/* ignore turbo channels for autoselect */
|
|
if ((c->ic_flags & IEEE80211_CHAN_TURBO) == 0)
|
|
break;
|
|
} else {
|
|
if ((c->ic_flags & modeflags) == modeflags)
|
|
break;
|
|
}
|
|
}
|
|
if (i > IEEE80211_CHAN_MAX) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
|
|
"%s: no channels found for mode %u\n", __func__, mode);
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Calculate the active channel set.
|
|
*/
|
|
memset(ic->ic_chan_active, 0, sizeof(ic->ic_chan_active));
|
|
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
|
|
c = &ic->ic_channels[i];
|
|
if (c->ic_flags == 0)
|
|
continue;
|
|
if (mode == IEEE80211_MODE_AUTO) {
|
|
/* take anything but pure turbo channels */
|
|
if ((c->ic_flags & IEEE80211_CHAN_TURBO) == 0)
|
|
setbit(ic->ic_chan_active, i);
|
|
} else {
|
|
if ((c->ic_flags & modeflags) == modeflags)
|
|
setbit(ic->ic_chan_active, i);
|
|
}
|
|
}
|
|
/*
|
|
* If no current/default channel is setup or the current
|
|
* channel is wrong for the mode then pick the first
|
|
* available channel from the active list. This is likely
|
|
* not the right one.
|
|
*/
|
|
if (ic->ic_ibss_chan == NULL ||
|
|
isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) {
|
|
for (i = 0; i <= IEEE80211_CHAN_MAX; i++)
|
|
if (isset(ic->ic_chan_active, i)) {
|
|
ic->ic_ibss_chan = &ic->ic_channels[i];
|
|
break;
|
|
}
|
|
IASSERT(ic->ic_ibss_chan != NULL &&
|
|
isset(ic->ic_chan_active,
|
|
ieee80211_chan2ieee(ic, ic->ic_ibss_chan)),
|
|
("Bad IBSS channel %u",
|
|
ieee80211_chan2ieee(ic, ic->ic_ibss_chan)));
|
|
}
|
|
/*
|
|
* If the desired channel is set but no longer valid then reset it.
|
|
*/
|
|
if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
|
|
isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_des_chan)))
|
|
ic->ic_des_chan = IEEE80211_CHAN_ANYC;
|
|
|
|
/*
|
|
* Do mode-specific rate setup.
|
|
*/
|
|
if (mode == IEEE80211_MODE_11G) {
|
|
/*
|
|
* Use a mixed 11b/11g rate set.
|
|
*/
|
|
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
|
|
IEEE80211_MODE_11G);
|
|
} else if (mode == IEEE80211_MODE_11B) {
|
|
/*
|
|
* Force pure 11b rate set.
|
|
*/
|
|
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
|
|
IEEE80211_MODE_11B);
|
|
}
|
|
/*
|
|
* Setup an initial rate set according to the
|
|
* current/default channel selected above. This
|
|
* will be changed when scanning but must exist
|
|
* now so driver have a consistent state of ic_ibss_chan.
|
|
*/
|
|
if (ic->ic_bss) /* NB: can be called before lateattach */
|
|
ic->ic_bss->ni_rates = ic->ic_sup_rates[mode];
|
|
|
|
ic->ic_curmode = mode;
|
|
ieee80211_reset_erp(ic); /* reset ERP state */
|
|
ieee80211_wme_initparams(ic); /* reset WME stat */
|
|
|
|
return 0;
|
|
#undef N
|
|
}
|
|
|
|
/*
|
|
* Return the phy mode for with the specified channel so the
|
|
* caller can select a rate set. This is problematic for channels
|
|
* where multiple operating modes are possible (e.g. 11g+11b).
|
|
* In those cases we defer to the current operating mode when set.
|
|
*/
|
|
enum ieee80211_phymode
|
|
ieee80211_chan2mode(struct ieee80211com *ic, struct ieee80211_channel *chan)
|
|
{
|
|
if (IEEE80211_IS_CHAN_T(chan)) {
|
|
return IEEE80211_MODE_TURBO_A;
|
|
} else if (IEEE80211_IS_CHAN_5GHZ(chan)) {
|
|
return IEEE80211_MODE_11A;
|
|
} else if (IEEE80211_IS_CHAN_FHSS(chan))
|
|
return IEEE80211_MODE_FH;
|
|
else if (chan->ic_flags & (IEEE80211_CHAN_OFDM|IEEE80211_CHAN_DYN)) {
|
|
/*
|
|
* This assumes all 11g channels are also usable
|
|
* for 11b, which is currently true.
|
|
*/
|
|
if (ic->ic_curmode == IEEE80211_MODE_TURBO_G)
|
|
return IEEE80211_MODE_TURBO_G;
|
|
if (ic->ic_curmode == IEEE80211_MODE_11B)
|
|
return IEEE80211_MODE_11B;
|
|
return IEEE80211_MODE_11G;
|
|
} else
|
|
return IEEE80211_MODE_11B;
|
|
}
|
|
|
|
/*
|
|
* convert IEEE80211 rate value to ifmedia subtype.
|
|
* ieee80211 rate is in unit of 0.5Mbps.
|
|
*/
|
|
int
|
|
ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
|
|
{
|
|
#define N(a) (sizeof(a) / sizeof(a[0]))
|
|
static const struct {
|
|
u_int m; /* rate + mode */
|
|
u_int r; /* if_media rate */
|
|
} 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 },
|
|
/* NB: OFDM72 doesn't realy exist so we don't handle it */
|
|
};
|
|
u_int mask, i;
|
|
|
|
mask = rate & IEEE80211_RATE_VAL;
|
|
switch (mode) {
|
|
case IEEE80211_MODE_11A:
|
|
case IEEE80211_MODE_TURBO_A:
|
|
mask |= IFM_IEEE80211_11A;
|
|
break;
|
|
case IEEE80211_MODE_11B:
|
|
mask |= IFM_IEEE80211_11B;
|
|
break;
|
|
case IEEE80211_MODE_FH:
|
|
mask |= IFM_IEEE80211_FH;
|
|
break;
|
|
case IEEE80211_MODE_AUTO:
|
|
/* NB: ic may be NULL for some drivers */
|
|
if (ic && ic->ic_phytype == IEEE80211_T_FH) {
|
|
mask |= IFM_IEEE80211_FH;
|
|
break;
|
|
}
|
|
/* NB: hack, 11g matches both 11b+11a rates */
|
|
/* fall thru... */
|
|
case IEEE80211_MODE_11G:
|
|
case IEEE80211_MODE_TURBO_G:
|
|
mask |= IFM_IEEE80211_11G;
|
|
break;
|
|
}
|
|
for (i = 0; i < N(rates); i++)
|
|
if (rates[i].m == mask)
|
|
return rates[i].r;
|
|
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 */
|
|
4, /* IFM_IEEE80211_DS2 */
|
|
11, /* IFM_IEEE80211_DS5 */
|
|
22, /* IFM_IEEE80211_DS11 */
|
|
2, /* IFM_IEEE80211_DS1 */
|
|
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 */
|
|
};
|
|
return IFM_SUBTYPE(mword) < N(ieeerates) ?
|
|
ieeerates[IFM_SUBTYPE(mword)] : 0;
|
|
#undef N
|
|
}
|