d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
96b2c26ae1
freebsd-dev/sys/net80211/ieee80211.c
Gleb Smirnoff 7a79cebfba Replay r286410. Change KPI of how device drivers that provide wireless 
connectivity interact with the net80211 stack.

Historical background: originally wireless devices created an interface,
just like Ethernet devices do. Name of an interface matched the name of
the driver that created. Later, wlan(4) layer was introduced, and the
wlanX interfaces become the actual interface, leaving original ones as
"a parent interface" of wlanX. Kernelwise, the KPI between net80211 layer
and a driver became a mix of methods that pass a pointer to struct ifnet
as identifier and methods that pass pointer to struct ieee80211com. From
user point of view, the parent interface just hangs on in the ifconfig
list, and user can't do anything useful with it.

Now, the struct ifnet goes away. The struct ieee80211com is the only
KPI between a device driver and net80211. Details:

- The struct ieee80211com is embedded into drivers softc.
- Packets are sent via new ic_transmit method, which is very much like
  the previous if_transmit.
- Bringing parent up/down is done via new ic_parent method, which notifies
  driver about any changes: number of wlan(4) interfaces, number of them
  in promisc or allmulti state.
- Device specific ioctls (if any) are received on new ic_ioctl method.
- Packets/errors accounting are done by the stack. In certain cases, when
  driver experiences errors and can not attribute them to any specific
  interface, driver updates ic_oerrors or ic_ierrors counters.

Details on interface configuration with new world order:
- A sequence of commands needed to bring up wireless DOESN"T change.
- /etc/rc.conf parameters DON'T change.
- List of devices that can be used to create wlan(4) interfaces is
  now provided by net.wlan.devices sysctl.

Most drivers in this change were converted by me, except of wpi(4),
that was done by Andriy Voskoboinyk. Big thanks to Kevin Lo for testing
changes to at least 8 drivers. Thanks to pluknet@, Oliver Hartmann,
Olivier Cochard, gjb@, mmoll@, op@ and lev@, who also participated in
testing.

Reviewed by:	adrian
Sponsored by:	Netflix
Sponsored by:	Nginx, Inc.
2015-08-27 08:56:39 +00:00

1814 lines
50 KiB
C
Raw Blame History

/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* IEEE 802.11 generic handler
*/
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sbuf.h>
#include <machine/stdarg.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_regdomain.h>
#ifdef IEEE80211_SUPPORT_SUPERG
#include <net80211/ieee80211_superg.h>
#endif
#include <net80211/ieee80211_ratectl.h>
#include <net/bpf.h>
const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
[IEEE80211_MODE_AUTO] = "auto",
[IEEE80211_MODE_11A] = "11a",
[IEEE80211_MODE_11B] = "11b",
[IEEE80211_MODE_11G] = "11g",
[IEEE80211_MODE_FH] = "FH",
[IEEE80211_MODE_TURBO_A] = "turboA",
[IEEE80211_MODE_TURBO_G] = "turboG",
[IEEE80211_MODE_STURBO_A] = "sturboA",
[IEEE80211_MODE_HALF] = "half",
[IEEE80211_MODE_QUARTER] = "quarter",
[IEEE80211_MODE_11NA] = "11na",
[IEEE80211_MODE_11NG] = "11ng",
};
/* map ieee80211_opmode to the corresponding capability bit */
const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
[IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
[IEEE80211_M_WDS] = IEEE80211_C_WDS,
[IEEE80211_M_STA] = IEEE80211_C_STA,
[IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
[IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
[IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
#ifdef IEEE80211_SUPPORT_MESH
[IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
#endif
};
const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
static int ieee80211_media_setup(struct ieee80211com *ic,
struct ifmedia *media, int caps, int addsta,
ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
static int media_status(enum ieee80211_opmode,
const struct ieee80211_channel *);
static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
/*
* Default supported rates for 802.11 operation (in IEEE .5Mb units).
*/
#define B(r) ((r) | IEEE80211_RATE_BASIC)
static const struct ieee80211_rateset ieee80211_rateset_11a =
{ 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
static const struct ieee80211_rateset ieee80211_rateset_half =
{ 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
static const struct ieee80211_rateset ieee80211_rateset_quarter =
{ 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
static const struct ieee80211_rateset ieee80211_rateset_11b =
{ 4, { B(2), B(4), B(11), B(22) } };
/* NB: OFDM rates are handled specially based on mode */
static const struct ieee80211_rateset ieee80211_rateset_11g =
{ 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
#undef B
/*
* Fill in 802.11 available channel set, mark
* all available channels as active, and pick
* a default channel if not already specified.
*/
void
ieee80211_chan_init(struct ieee80211com *ic)
{
#define DEFAULTRATES(m, def) do { \
if (ic->ic_sup_rates[m].rs_nrates == 0) \
ic->ic_sup_rates[m] = def; \
} while (0)
struct ieee80211_channel *c;
int i;
KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
("invalid number of channels specified: %u", ic->ic_nchans));
memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
KASSERT(c->ic_flags != 0, ("channel with no flags"));
/*
* Help drivers that work only with frequencies by filling
* in IEEE channel #'s if not already calculated. Note this
* mimics similar work done in ieee80211_setregdomain when
* changing regulatory state.
*/
if (c->ic_ieee == 0)
c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
(IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
c->ic_flags);
/* default max tx power to max regulatory */
if (c->ic_maxpower == 0)
c->ic_maxpower = 2*c->ic_maxregpower;
setbit(ic->ic_chan_avail, c->ic_ieee);
/*
* Identify mode capabilities.
*/
if (IEEE80211_IS_CHAN_A(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
if (IEEE80211_IS_CHAN_B(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
if (IEEE80211_IS_CHAN_ANYG(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
if (IEEE80211_IS_CHAN_FHSS(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
if (IEEE80211_IS_CHAN_108A(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
if (IEEE80211_IS_CHAN_108G(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
if (IEEE80211_IS_CHAN_ST(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
if (IEEE80211_IS_CHAN_HALF(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
if (IEEE80211_IS_CHAN_QUARTER(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
if (IEEE80211_IS_CHAN_HTA(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
if (IEEE80211_IS_CHAN_HTG(c))
setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
}
/* initialize candidate channels to all available */
memcpy(ic->ic_chan_active, ic->ic_chan_avail,
sizeof(ic->ic_chan_avail));
/* sort channel table to allow lookup optimizations */
ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
/* invalidate any previous state */
ic->ic_bsschan = IEEE80211_CHAN_ANYC;
ic->ic_prevchan = NULL;
ic->ic_csa_newchan = NULL;
/* arbitrarily pick the first channel */
ic->ic_curchan = &ic->ic_channels[0];
ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
/* fillin well-known rate sets if driver has not specified */
DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
/*
* Setup required information to fill the mcsset field, if driver did
* not. Assume a 2T2R setup for historic reasons.
*/
if (ic->ic_rxstream == 0)
ic->ic_rxstream = 2;
if (ic->ic_txstream == 0)
ic->ic_txstream = 2;
/*
* Set auto mode to reset active channel state and any desired channel.
*/
(void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
#undef DEFAULTRATES
}
static void
null_update_mcast(struct ieee80211com *ic)
{
ic_printf(ic, "need multicast update callback\n");
}
static void
null_update_promisc(struct ieee80211com *ic)
{
ic_printf(ic, "need promiscuous mode update callback\n");
}
static void
null_update_chw(struct ieee80211com *ic)
{
ic_printf(ic, "%s: need callback\n", __func__);
}
int
ic_printf(struct ieee80211com *ic, const char * fmt, ...)
{
va_list ap;
int retval;
retval = printf("%s: ", ic->ic_name);
va_start(ap, fmt);
retval += vprintf(fmt, ap);
va_end(ap);
return (retval);
}
static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
static struct mtx ic_list_mtx;
MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
static int
sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
{
struct ieee80211com *ic;
struct sbuf *sb;
char *sp;
int error;
sb = sbuf_new_auto();
sp = "";
mtx_lock(&ic_list_mtx);
LIST_FOREACH(ic, &ic_head, ic_next) {
sbuf_printf(sb, "%s%s", sp, ic->ic_name);
sp = " ";
}
mtx_unlock(&ic_list_mtx);
sbuf_finish(sb);
error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
sbuf_delete(sb);
return (error);
}
SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
sysctl_ieee80211coms, "A", "names of available 802.11 devices");
/*
* Attach/setup the common net80211 state. Called by
* the driver on attach to prior to creating any vap's.
*/
void
ieee80211_ifattach(struct ieee80211com *ic)
{
IEEE80211_LOCK_INIT(ic, ic->ic_name);
IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
TAILQ_INIT(&ic->ic_vaps);
/* Create a taskqueue for all state changes */
ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
taskqueue_thread_enqueue, &ic->ic_tq);
taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
ic->ic_name);
ic->ic_ierrors = counter_u64_alloc(M_WAITOK);
ic->ic_oerrors = counter_u64_alloc(M_WAITOK);
/*
* Fill in 802.11 available channel set, mark all
* available channels as active, and pick a default
* channel if not already specified.
*/
ieee80211_chan_init(ic);
ic->ic_update_mcast = null_update_mcast;
ic->ic_update_promisc = null_update_promisc;
ic->ic_update_chw = null_update_chw;
ic->ic_hash_key = arc4random();
ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
ic->ic_lintval = ic->ic_bintval;
ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
ieee80211_crypto_attach(ic);
ieee80211_node_attach(ic);
ieee80211_power_attach(ic);
ieee80211_proto_attach(ic);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_superg_attach(ic);
#endif
ieee80211_ht_attach(ic);
ieee80211_scan_attach(ic);
ieee80211_regdomain_attach(ic);
ieee80211_dfs_attach(ic);
ieee80211_sysctl_attach(ic);
mtx_lock(&ic_list_mtx);
LIST_INSERT_HEAD(&ic_head, ic, ic_next);
mtx_unlock(&ic_list_mtx);
}
/*
* Detach net80211 state on device detach. Tear down
* all vap's and reclaim all common state prior to the
* device state going away. Note we may call back into
* driver; it must be prepared for this.
*/
void
ieee80211_ifdetach(struct ieee80211com *ic)
{
struct ieee80211vap *vap;
mtx_lock(&ic_list_mtx);
LIST_REMOVE(ic, ic_next);
mtx_unlock(&ic_list_mtx);
/*
* The VAP is responsible for setting and clearing
* the VIMAGE context.
*/
while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
ieee80211_vap_destroy(vap);
ieee80211_waitfor_parent(ic);
ieee80211_sysctl_detach(ic);
ieee80211_dfs_detach(ic);
ieee80211_regdomain_detach(ic);
ieee80211_scan_detach(ic);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_superg_detach(ic);
#endif
ieee80211_ht_detach(ic);
/* NB: must be called before ieee80211_node_detach */
ieee80211_proto_detach(ic);
ieee80211_crypto_detach(ic);
ieee80211_power_detach(ic);
ieee80211_node_detach(ic);
counter_u64_free(ic->ic_ierrors);
counter_u64_free(ic->ic_oerrors);
taskqueue_free(ic->ic_tq);
IEEE80211_TX_LOCK_DESTROY(ic);
IEEE80211_LOCK_DESTROY(ic);
}
struct ieee80211com *
ieee80211_find_com(const char *name)
{
struct ieee80211com *ic;
mtx_lock(&ic_list_mtx);
LIST_FOREACH(ic, &ic_head, ic_next)
if (strcmp(ic->ic_name, name) == 0)
break;
mtx_unlock(&ic_list_mtx);
return (ic);
}
/*
* Default reset method for use with the ioctl support. This
* method is invoked after any state change in the 802.11
* layer that should be propagated to the hardware but not
* require re-initialization of the 802.11 state machine (e.g
* rescanning for an ap). We always return ENETRESET which
* should cause the driver to re-initialize the device. Drivers
* can override this method to implement more optimized support.
*/
static int
default_reset(struct ieee80211vap *vap, u_long cmd)
{
return ENETRESET;
}
/*
* Add underlying device errors to vap errors.
*/
static uint64_t
ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
{
struct ieee80211vap *vap = ifp->if_softc;
struct ieee80211com *ic = vap->iv_ic;
uint64_t rv;
rv = if_get_counter_default(ifp, cnt);
switch (cnt) {
case IFCOUNTER_OERRORS:
rv += counter_u64_fetch(ic->ic_oerrors);
break;
case IFCOUNTER_IERRORS:
rv += counter_u64_fetch(ic->ic_ierrors);
break;
default:
break;
}
return (rv);
}
/*
* Prepare a vap for use. Drivers use this call to
* setup net80211 state in new vap's prior attaching
* them with ieee80211_vap_attach (below).
*/
int
ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
{
struct ifnet *ifp;
ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
ic_printf(ic, "%s: unable to allocate ifnet\n",
__func__);
return ENOMEM;
}
if_initname(ifp, name, unit);
ifp->if_softc = vap; /* back pointer */
ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
ifp->if_transmit = ieee80211_vap_transmit;
ifp->if_qflush = ieee80211_vap_qflush;
ifp->if_ioctl = ieee80211_ioctl;
ifp->if_init = ieee80211_init;
ifp->if_get_counter = ieee80211_get_counter;
vap->iv_ifp = ifp;
vap->iv_ic = ic;
vap->iv_flags = ic->ic_flags; /* propagate common flags */
vap->iv_flags_ext = ic->ic_flags_ext;
vap->iv_flags_ven = ic->ic_flags_ven;
vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
vap->iv_htcaps = ic->ic_htcaps;
vap->iv_htextcaps = ic->ic_htextcaps;
vap->iv_opmode = opmode;
vap->iv_caps |= ieee80211_opcap[opmode];
vap->iv_myaddr = ic->ic_macaddr;
switch (opmode) {
case IEEE80211_M_WDS:
/*
* WDS links must specify the bssid of the far end.
* For legacy operation this is a static relationship.
* For non-legacy operation the station must associate
* and be authorized to pass traffic. Plumbing the
* vap to the proper node happens when the vap
* transitions to RUN state.
*/
IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
vap->iv_flags |= IEEE80211_F_DESBSSID;
if (flags & IEEE80211_CLONE_WDSLEGACY)
vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
break;
#ifdef IEEE80211_SUPPORT_TDMA
case IEEE80211_M_AHDEMO:
if (flags & IEEE80211_CLONE_TDMA) {
/* NB: checked before clone operation allowed */
KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
/*
* Propagate TDMA capability to mark vap; this
* cannot be removed and is used to distinguish
* regular ahdemo operation from ahdemo+tdma.
*/
vap->iv_caps |= IEEE80211_C_TDMA;
}
break;
#endif
default:
break;
}
/* auto-enable s/w beacon miss support */
if (flags & IEEE80211_CLONE_NOBEACONS)
vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
/* auto-generated or user supplied MAC address */
if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
/*
* Enable various functionality by default if we're
* capable; the driver can override us if it knows better.
*/
if (vap->iv_caps & IEEE80211_C_WME)
vap->iv_flags |= IEEE80211_F_WME;
if (vap->iv_caps & IEEE80211_C_BURST)
vap->iv_flags |= IEEE80211_F_BURST;
/* NB: bg scanning only makes sense for station mode right now */
if (vap->iv_opmode == IEEE80211_M_STA &&
(vap->iv_caps & IEEE80211_C_BGSCAN))
vap->iv_flags |= IEEE80211_F_BGSCAN;
vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
/* NB: DFS support only makes sense for ap mode right now */
if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
(vap->iv_caps & IEEE80211_C_DFS))
vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
/*
* Install a default reset method for the ioctl support;
* the driver can override this.
*/
vap->iv_reset = default_reset;
ieee80211_sysctl_vattach(vap);
ieee80211_crypto_vattach(vap);
ieee80211_node_vattach(vap);
ieee80211_power_vattach(vap);
ieee80211_proto_vattach(vap);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_superg_vattach(vap);
#endif
ieee80211_ht_vattach(vap);
ieee80211_scan_vattach(vap);
ieee80211_regdomain_vattach(vap);
ieee80211_radiotap_vattach(vap);
ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
return 0;
}
/*
* Activate a vap. State should have been prepared with a
* call to ieee80211_vap_setup and by the driver. On return
* from this call the vap is ready for use.
*/
int
ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
{
struct ifnet *ifp = vap->iv_ifp;
struct ieee80211com *ic = vap->iv_ic;
struct ifmediareq imr;
int maxrate;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
"%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
__func__, ieee80211_opmode_name[vap->iv_opmode],
ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
/*
* Do late attach work that cannot happen until after
* the driver has had a chance to override defaults.
*/
ieee80211_node_latevattach(vap);
ieee80211_power_latevattach(vap);
maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
ieee80211_media_status(ifp, &imr);
/* NB: strip explicit mode; we're actually in autoselect */
ifmedia_set(&vap->iv_media,
imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
if (maxrate)
ifp->if_baudrate = IF_Mbps(maxrate);
ether_ifattach(ifp, macaddr);
vap->iv_myaddr = IF_LLADDR(ifp);
/* hook output method setup by ether_ifattach */
vap->iv_output = ifp->if_output;
ifp->if_output = ieee80211_output;
/* NB: if_mtu set by ether_ifattach to ETHERMTU */
IEEE80211_LOCK(ic);
TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
#endif
ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
IEEE80211_UNLOCK(ic);
return 1;
}
/*
* Tear down vap state and reclaim the ifnet.
* The driver is assumed to have prepared for
* this; e.g. by turning off interrupts for the
* underlying device.
*/
void
ieee80211_vap_detach(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct ifnet *ifp = vap->iv_ifp;
CURVNET_SET(ifp->if_vnet);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
__func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
/* NB: bpfdetach is called by ether_ifdetach and claims all taps */
ether_ifdetach(ifp);
ieee80211_stop(vap);
/*
* Flush any deferred vap tasks.
*/
ieee80211_draintask(ic, &vap->iv_nstate_task);
ieee80211_draintask(ic, &vap->iv_swbmiss_task);
/* XXX band-aid until ifnet handles this for us */
taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
IEEE80211_LOCK(ic);
KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
#endif
ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
/* NB: this handles the bpfdetach done below */
ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
if (vap->iv_ifflags & IFF_PROMISC)
ieee80211_promisc(vap, false);
if (vap->iv_ifflags & IFF_ALLMULTI)
ieee80211_allmulti(vap, false);
IEEE80211_UNLOCK(ic);
ifmedia_removeall(&vap->iv_media);
ieee80211_radiotap_vdetach(vap);
ieee80211_regdomain_vdetach(vap);
ieee80211_scan_vdetach(vap);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_superg_vdetach(vap);
#endif
ieee80211_ht_vdetach(vap);
/* NB: must be before ieee80211_node_vdetach */
ieee80211_proto_vdetach(vap);
ieee80211_crypto_vdetach(vap);
ieee80211_power_vdetach(vap);
ieee80211_node_vdetach(vap);
ieee80211_sysctl_vdetach(vap);
if_free(ifp);
CURVNET_RESTORE();
}
/*
* Count number of vaps in promisc, and issue promisc on
* parent respectively.
*/
void
ieee80211_promisc(struct ieee80211vap *vap, bool on)
{
struct ieee80211com *ic = vap->iv_ic;
/*
* XXX the bridge sets PROMISC but we don't want to
* enable it on the device, discard here so all the
* drivers don't need to special-case it
*/
if (!(vap->iv_opmode == IEEE80211_M_MONITOR ||
(vap->iv_opmode == IEEE80211_M_AHDEMO &&
(vap->iv_caps & IEEE80211_C_TDMA) == 0)))
return;
IEEE80211_LOCK(ic);
if (on) {
if (++ic->ic_promisc == 1)
ieee80211_runtask(ic, &ic->ic_promisc_task);
} else {
KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
__func__, ic));
if (--ic->ic_promisc == 0)
ieee80211_runtask(ic, &ic->ic_promisc_task);
}
IEEE80211_UNLOCK(ic);
}
/*
* Count number of vaps in allmulti, and issue allmulti on
* parent respectively.
*/
void
ieee80211_allmulti(struct ieee80211vap *vap, bool on)
{
struct ieee80211com *ic = vap->iv_ic;
IEEE80211_LOCK(ic);
if (on) {
if (++ic->ic_allmulti == 1)
ieee80211_runtask(ic, &ic->ic_mcast_task);
} else {
KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
__func__, ic));
if (--ic->ic_allmulti == 0)
ieee80211_runtask(ic, &ic->ic_mcast_task);
}
IEEE80211_UNLOCK(ic);
}
/*
* Synchronize flag bit state in the com structure
* according to the state of all vap's. This is used,
* for example, to handle state changes via ioctls.
*/
static void
ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
{
struct ieee80211vap *vap;
int bit;
IEEE80211_LOCK_ASSERT(ic);
bit = 0;
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
if (vap->iv_flags & flag) {
bit = 1;
break;
}
if (bit)
ic->ic_flags |= flag;
else
ic->ic_flags &= ~flag;
}
void
ieee80211_syncflag(struct ieee80211vap *vap, int flag)
{
struct ieee80211com *ic = vap->iv_ic;
IEEE80211_LOCK(ic);
if (flag < 0) {
flag = -flag;
vap->iv_flags &= ~flag;
} else
vap->iv_flags |= flag;
ieee80211_syncflag_locked(ic, flag);
IEEE80211_UNLOCK(ic);
}
/*
* Synchronize flags_ht bit state in the com structure
* according to the state of all vap's. This is used,
* for example, to handle state changes via ioctls.
*/
static void
ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
{
struct ieee80211vap *vap;
int bit;
IEEE80211_LOCK_ASSERT(ic);
bit = 0;
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
if (vap->iv_flags_ht & flag) {
bit = 1;
break;
}
if (bit)
ic->ic_flags_ht |= flag;
else
ic->ic_flags_ht &= ~flag;
}
void
ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
{
struct ieee80211com *ic = vap->iv_ic;
IEEE80211_LOCK(ic);
if (flag < 0) {
flag = -flag;
vap->iv_flags_ht &= ~flag;
} else
vap->iv_flags_ht |= flag;
ieee80211_syncflag_ht_locked(ic, flag);
IEEE80211_UNLOCK(ic);
}
/*
* Synchronize flags_ext bit state in the com structure
* according to the state of all vap's. This is used,
* for example, to handle state changes via ioctls.
*/
static void
ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
{
struct ieee80211vap *vap;
int bit;
IEEE80211_LOCK_ASSERT(ic);
bit = 0;
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
if (vap->iv_flags_ext & flag) {
bit = 1;
break;
}
if (bit)
ic->ic_flags_ext |= flag;
else
ic->ic_flags_ext &= ~flag;
}
void
ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
{
struct ieee80211com *ic = vap->iv_ic;
IEEE80211_LOCK(ic);
if (flag < 0) {
flag = -flag;
vap->iv_flags_ext &= ~flag;
} else
vap->iv_flags_ext |= flag;
ieee80211_syncflag_ext_locked(ic, flag);
IEEE80211_UNLOCK(ic);
}
static __inline int
mapgsm(u_int freq, u_int flags)
{
freq *= 10;
if (flags & IEEE80211_CHAN_QUARTER)
freq += 5;
else if (flags & IEEE80211_CHAN_HALF)
freq += 10;
else
freq += 20;
/* NB: there is no 907/20 wide but leave room */
return (freq - 906*10) / 5;
}
static __inline int
mappsb(u_int freq, u_int flags)
{
return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
}
/*
* Convert MHz frequency to IEEE channel number.
*/
int
ieee80211_mhz2ieee(u_int freq, u_int flags)
{
#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
if (flags & IEEE80211_CHAN_GSM)
return mapgsm(freq, flags);
if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
if (freq == 2484)
return 14;
if (freq < 2484)
return ((int) freq - 2407) / 5;
else
return 15 + ((freq - 2512) / 20);
} else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
if (freq <= 5000) {
/* XXX check regdomain? */
if (IS_FREQ_IN_PSB(freq))
return mappsb(freq, flags);
return (freq - 4000) / 5;
} else
return (freq - 5000) / 5;
} else { /* either, guess */
if (freq == 2484)
return 14;
if (freq < 2484) {
if (907 <= freq && freq <= 922)
return mapgsm(freq, flags);
return ((int) freq - 2407) / 5;
}
if (freq < 5000) {
if (IS_FREQ_IN_PSB(freq))
return mappsb(freq, flags);
else if (freq > 4900)
return (freq - 4000) / 5;
else
return 15 + ((freq - 2512) / 20);
}
return (freq - 5000) / 5;
}
#undef IS_FREQ_IN_PSB
}
/*
* Convert channel to IEEE channel number.
*/
int
ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
{
if (c == NULL) {
ic_printf(ic, "invalid channel (NULL)\n");
return 0; /* XXX */
}
return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
}
/*
* Convert IEEE channel number to MHz frequency.
*/
u_int
ieee80211_ieee2mhz(u_int chan, u_int flags)
{
if (flags & IEEE80211_CHAN_GSM)
return 907 + 5 * (chan / 10);
if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
if (chan == 14)
return 2484;
if (chan < 14)
return 2407 + chan*5;
else
return 2512 + ((chan-15)*20);
} else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
chan -= 37;
return 4940 + chan*5 + (chan % 5 ? 2 : 0);
}
return 5000 + (chan*5);
} else { /* either, guess */
/* XXX can't distinguish PSB+GSM channels */
if (chan == 14)
return 2484;
if (chan < 14) /* 0-13 */
return 2407 + chan*5;
if (chan < 27) /* 15-26 */
return 2512 + ((chan-15)*20);
return 5000 + (chan*5);
}
}
/*
* Locate a channel given a frequency+flags. We cache
* the previous lookup to optimize switching between two
* channels--as happens with dynamic turbo.
*/
struct ieee80211_channel *
ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
{
struct ieee80211_channel *c;
int i;
flags &= IEEE80211_CHAN_ALLTURBO;
c = ic->ic_prevchan;
if (c != NULL && c->ic_freq == freq &&
(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
return c;
/* brute force search */
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (c->ic_freq == freq &&
(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
return c;
}
return NULL;
}
/*
* Locate a channel given a channel number+flags. We cache
* the previous lookup to optimize switching between two
* channels--as happens with dynamic turbo.
*/
struct ieee80211_channel *
ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
{
struct ieee80211_channel *c;
int i;
flags &= IEEE80211_CHAN_ALLTURBO;
c = ic->ic_prevchan;
if (c != NULL && c->ic_ieee == ieee &&
(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
return c;
/* brute force search */
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (c->ic_ieee == ieee &&
(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
return c;
}
return NULL;
}
/*
* Lookup a channel suitable for the given rx status.
*
* This is used to find a channel for a frame (eg beacon, probe
* response) based purely on the received PHY information.
*
* For now it tries to do it based on R_FREQ / R_IEEE.
* This is enough for 11bg and 11a (and thus 11ng/11na)
* but it will not be enough for GSM, PSB channels and the
* like. It also doesn't know about legacy-turbog and
* legacy-turbo modes, which some offload NICs actually
* support in weird ways.
*
* Takes the ic and rxstatus; returns the channel or NULL
* if not found.
*
* XXX TODO: Add support for that when the need arises.
*/
struct ieee80211_channel *
ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
const struct ieee80211_rx_stats *rxs)
{
struct ieee80211com *ic = vap->iv_ic;
uint32_t flags;
struct ieee80211_channel *c;
if (rxs == NULL)
return (NULL);
/*
* Strictly speaking we only use freq for now,
* however later on we may wish to just store
* the ieee for verification.
*/
if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
return (NULL);
if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
return (NULL);
/*
* If the rx status contains a valid ieee/freq, then
* ensure we populate the correct channel information
* in rxchan before passing it up to the scan infrastructure.
* Offload NICs will pass up beacons from all channels
* during background scans.
*/
/* Determine a band */
/* XXX should be done by the driver? */
if (rxs->c_freq < 3000) {
flags = IEEE80211_CHAN_G;
} else {
flags = IEEE80211_CHAN_A;
}
/* Channel lookup */
c = ieee80211_find_channel(ic, rxs->c_freq, flags);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
"%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
__func__,
(int) rxs->c_freq,
(int) rxs->c_ieee,
flags,
c);
return (c);
}
static void
addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
{
#define ADD(_ic, _s, _o) \
ifmedia_add(media, \
IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
static const u_int mopts[IEEE80211_MODE_MAX] = {
[IEEE80211_MODE_AUTO] = IFM_AUTO,
[IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
[IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
[IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
[IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
[IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
[IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
[IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
[IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
[IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
[IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
[IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
};
u_int mopt;
mopt = mopts[mode];
if (addsta)
ADD(ic, mword, mopt); /* STA mode has no cap */
if (caps & IEEE80211_C_IBSS)
ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
if (caps & IEEE80211_C_HOSTAP)
ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
if (caps & IEEE80211_C_AHDEMO)
ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (caps & IEEE80211_C_MONITOR)
ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
if (caps & IEEE80211_C_WDS)
ADD(media, mword, mopt | IFM_IEEE80211_WDS);
if (caps & IEEE80211_C_MBSS)
ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
#undef ADD
}
/*
* Setup the media data structures according to the channel and
* rate tables.
*/
static int
ieee80211_media_setup(struct ieee80211com *ic,
struct ifmedia *media, int caps, int addsta,
ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
{
int i, j, rate, maxrate, mword, r;
enum ieee80211_phymode mode;
const struct ieee80211_rateset *rs;
struct ieee80211_rateset allrates;
/*
* Fill in media characteristics.
*/
ifmedia_init(media, 0, media_change, media_stat);
maxrate = 0;
/*
* Add media for legacy operating modes.
*/
memset(&allrates, 0, sizeof(allrates));
for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
if (isclr(ic->ic_modecaps, mode))
continue;
addmedia(media, caps, addsta, mode, IFM_AUTO);
if (mode == IEEE80211_MODE_AUTO)
continue;
rs = &ic->ic_sup_rates[mode];
for (i = 0; i < rs->rs_nrates; i++) {
rate = rs->rs_rates[i];
mword = ieee80211_rate2media(ic, rate, mode);
if (mword == 0)
continue;
addmedia(media, caps, addsta, mode, mword);
/*
* Add legacy rate to the collection of all rates.
*/
r = rate & IEEE80211_RATE_VAL;
for (j = 0; j < allrates.rs_nrates; j++)
if (allrates.rs_rates[j] == r)
break;
if (j == allrates.rs_nrates) {
/* unique, add to the set */
allrates.rs_rates[j] = r;
allrates.rs_nrates++;
}
rate = (rate & IEEE80211_RATE_VAL) / 2;
if (rate > maxrate)
maxrate = rate;
}
}
for (i = 0; i < allrates.rs_nrates; i++) {
mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
IEEE80211_MODE_AUTO);
if (mword == 0)
continue;
/* NB: remove media options from mword */
addmedia(media, caps, addsta,
IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
}
/*
* Add HT/11n media. Note that we do not have enough
* bits in the media subtype to express the MCS so we
* use a "placeholder" media subtype and any fixed MCS
* must be specified with a different mechanism.
*/
for (; mode <= IEEE80211_MODE_11NG; mode++) {
if (isclr(ic->ic_modecaps, mode))
continue;
addmedia(media, caps, addsta, mode, IFM_AUTO);
addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
}
if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
addmedia(media, caps, addsta,
IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
i = ic->ic_txstream * 8 - 1;
if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
(ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
rate = ieee80211_htrates[i].ht40_rate_400ns;
else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
rate = ieee80211_htrates[i].ht40_rate_800ns;
else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
rate = ieee80211_htrates[i].ht20_rate_400ns;
else
rate = ieee80211_htrates[i].ht20_rate_800ns;
if (rate > maxrate)
maxrate = rate;
}
return maxrate;
}
/* XXX inline or eliminate? */
const struct ieee80211_rateset *
ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
{
/* XXX does this work for 11ng basic rates? */
return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
}
void
ieee80211_announce(struct ieee80211com *ic)
{
int i, rate, mword;
enum ieee80211_phymode mode;
const struct ieee80211_rateset *rs;
/* NB: skip AUTO since it has no rates */
for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
if (isclr(ic->ic_modecaps, mode))
continue;
ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
rs = &ic->ic_sup_rates[mode];
for (i = 0; i < rs->rs_nrates; i++) {
mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
if (mword == 0)
continue;
rate = ieee80211_media2rate(mword);
printf("%s%d%sMbps", (i != 0 ? " " : ""),
rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
}
printf("\n");
}
ieee80211_ht_announce(ic);
}
void
ieee80211_announce_channels(struct ieee80211com *ic)
{
const struct ieee80211_channel *c;
char type;
int i, cw;
printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (IEEE80211_IS_CHAN_ST(c))
type = 'S';
else if (IEEE80211_IS_CHAN_108A(c))
type = 'T';
else if (IEEE80211_IS_CHAN_108G(c))
type = 'G';
else if (IEEE80211_IS_CHAN_HT(c))
type = 'n';
else if (IEEE80211_IS_CHAN_A(c))
type = 'a';
else if (IEEE80211_IS_CHAN_ANYG(c))
type = 'g';
else if (IEEE80211_IS_CHAN_B(c))
type = 'b';
else
type = 'f';
if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
cw = 40;
else if (IEEE80211_IS_CHAN_HALF(c))
cw = 10;
else if (IEEE80211_IS_CHAN_QUARTER(c))
cw = 5;
else
cw = 20;
printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
, c->ic_ieee, c->ic_freq, type
, cw
, IEEE80211_IS_CHAN_HT40U(c) ? '+' :
IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
, c->ic_maxregpower
, c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
, c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
);
}
}
static int
media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
{
switch (IFM_MODE(ime->ifm_media)) {
case IFM_IEEE80211_11A:
*mode = IEEE80211_MODE_11A;
break;
case IFM_IEEE80211_11B:
*mode = IEEE80211_MODE_11B;
break;
case IFM_IEEE80211_11G:
*mode = IEEE80211_MODE_11G;
break;
case IFM_IEEE80211_FH:
*mode = IEEE80211_MODE_FH;
break;
case IFM_IEEE80211_11NA:
*mode = IEEE80211_MODE_11NA;
break;
case IFM_IEEE80211_11NG:
*mode = IEEE80211_MODE_11NG;
break;
case IFM_AUTO:
*mode = IEEE80211_MODE_AUTO;
break;
default:
return 0;
}
/*
* Turbo mode is an ``option''.
* XXX does not apply to AUTO
*/
if (ime->ifm_media & IFM_IEEE80211_TURBO) {
if (*mode == IEEE80211_MODE_11A) {
if (flags & IEEE80211_F_TURBOP)
*mode = IEEE80211_MODE_TURBO_A;
else
*mode = IEEE80211_MODE_STURBO_A;
} else if (*mode == IEEE80211_MODE_11G)
*mode = IEEE80211_MODE_TURBO_G;
else
return 0;
}
/* XXX HT40 +/- */
return 1;
}
/*
* Handle a media change request on the vap interface.
*/
int
ieee80211_media_change(struct ifnet *ifp)
{
struct ieee80211vap *vap = ifp->if_softc;
struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
uint16_t newmode;
if (!media2mode(ime, vap->iv_flags, &newmode))
return EINVAL;
if (vap->iv_des_mode != newmode) {
vap->iv_des_mode = newmode;
/* XXX kick state machine if up+running */
}
return 0;
}
/*
* Common code to calculate the media status word
* from the operating mode and channel state.
*/
static int
media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
{
int status;
status = IFM_IEEE80211;
switch (opmode) {
case IEEE80211_M_STA:
break;
case IEEE80211_M_IBSS:
status |= IFM_IEEE80211_ADHOC;
break;
case IEEE80211_M_HOSTAP:
status |= IFM_IEEE80211_HOSTAP;
break;
case IEEE80211_M_MONITOR:
status |= IFM_IEEE80211_MONITOR;
break;
case IEEE80211_M_AHDEMO:
status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
break;
case IEEE80211_M_WDS:
status |= IFM_IEEE80211_WDS;
break;
case IEEE80211_M_MBSS:
status |= IFM_IEEE80211_MBSS;
break;
}
if (IEEE80211_IS_CHAN_HTA(chan)) {
status |= IFM_IEEE80211_11NA;
} else if (IEEE80211_IS_CHAN_HTG(chan)) {
status |= IFM_IEEE80211_11NG;
} else if (IEEE80211_IS_CHAN_A(chan)) {
status |= IFM_IEEE80211_11A;
} else if (IEEE80211_IS_CHAN_B(chan)) {
status |= IFM_IEEE80211_11B;
} else if (IEEE80211_IS_CHAN_ANYG(chan)) {
status |= IFM_IEEE80211_11G;
} else if (IEEE80211_IS_CHAN_FHSS(chan)) {
status |= IFM_IEEE80211_FH;
}
/* XXX else complain? */
if (IEEE80211_IS_CHAN_TURBO(chan))
status |= IFM_IEEE80211_TURBO;
#if 0
if (IEEE80211_IS_CHAN_HT20(chan))
status |= IFM_IEEE80211_HT20;
if (IEEE80211_IS_CHAN_HT40(chan))
status |= IFM_IEEE80211_HT40;
#endif
return status;
}
void
ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
{
struct ieee80211vap *vap = ifp->if_softc;
struct ieee80211com *ic = vap->iv_ic;
enum ieee80211_phymode mode;
imr->ifm_status = IFM_AVALID;
/*
* NB: use the current channel's mode to lock down a xmit
* rate only when running; otherwise we may have a mismatch
* in which case the rate will not be convertible.
*/
if (vap->iv_state == IEEE80211_S_RUN ||
vap->iv_state == IEEE80211_S_SLEEP) {
imr->ifm_status |= IFM_ACTIVE;
mode = ieee80211_chan2mode(ic->ic_curchan);
} else
mode = IEEE80211_MODE_AUTO;
imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
/*
* Calculate a current rate if possible.
*/
if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
/*
* A fixed rate is set, report that.
*/
imr->ifm_active |= ieee80211_rate2media(ic,
vap->iv_txparms[mode].ucastrate, mode);
} else if (vap->iv_opmode == IEEE80211_M_STA) {
/*
* In station mode report the current transmit rate.
*/
imr->ifm_active |= ieee80211_rate2media(ic,
vap->iv_bss->ni_txrate, mode);
} else
imr->ifm_active |= IFM_AUTO;
if (imr->ifm_status & IFM_ACTIVE)
imr->ifm_current = imr->ifm_active;
}
/*
* Set the current phy mode and recalculate the active channel
* set based on the available channels for this mode. Also
* select a new default/current channel if the current one is
* inappropriate for this mode.
*/
int
ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
{
/*
* Adjust basic rates in 11b/11g supported rate set.
* Note that if operating on a hal/quarter rate channel
* this is a noop as those rates sets are different
* and used instead.
*/
if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
ic->ic_curmode = mode;
ieee80211_reset_erp(ic); /* reset ERP state */
return 0;
}
/*
* Return the phy mode for with the specified channel.
*/
enum ieee80211_phymode
ieee80211_chan2mode(const struct ieee80211_channel *chan)
{
if (IEEE80211_IS_CHAN_HTA(chan))
return IEEE80211_MODE_11NA;
else if (IEEE80211_IS_CHAN_HTG(chan))
return IEEE80211_MODE_11NG;
else if (IEEE80211_IS_CHAN_108G(chan))
return IEEE80211_MODE_TURBO_G;
else if (IEEE80211_IS_CHAN_ST(chan))
return IEEE80211_MODE_STURBO_A;
else if (IEEE80211_IS_CHAN_TURBO(chan))
return IEEE80211_MODE_TURBO_A;
else if (IEEE80211_IS_CHAN_HALF(chan))
return IEEE80211_MODE_HALF;
else if (IEEE80211_IS_CHAN_QUARTER(chan))
return IEEE80211_MODE_QUARTER;
else if (IEEE80211_IS_CHAN_A(chan))
return IEEE80211_MODE_11A;
else if (IEEE80211_IS_CHAN_ANYG(chan))
return IEEE80211_MODE_11G;
else if (IEEE80211_IS_CHAN_B(chan))
return IEEE80211_MODE_11B;
else if (IEEE80211_IS_CHAN_FHSS(chan))
return IEEE80211_MODE_FH;
/* NB: should not get here */
printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
__func__, chan->ic_freq, chan->ic_flags);
return IEEE80211_MODE_11B;
}
struct ratemedia {
u_int match; /* rate + mode */
u_int media; /* if_media rate */
};
static int
findmedia(const struct ratemedia rates[], int n, u_int match)
{
int i;
for (i = 0; i < n; i++)
if (rates[i].match == match)
return rates[i].media;
return IFM_AUTO;
}
/*
* Convert IEEE80211 rate value to ifmedia subtype.
* Rate is either a legacy rate in units of 0.5Mbps
* or an MCS index.
*/
int
ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
{
static const struct ratemedia rates[] = {
{ 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
{ 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
{ 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
{ 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
{ 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
{ 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
{ 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
{ 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
{ 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
{ 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
{ 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
{ 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
{ 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
{ 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
{ 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
{ 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
{ 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
{ 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
{ 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
{ 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
{ 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
{ 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
{ 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
{ 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
{ 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
{ 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
{ 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
{ 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
{ 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
{ 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
/* NB: OFDM72 doesn't realy exist so we don't handle it */
};
static const struct ratemedia htrates[] = {
{ 0, IFM_IEEE80211_MCS },
{ 1, IFM_IEEE80211_MCS },
{ 2, IFM_IEEE80211_MCS },
{ 3, IFM_IEEE80211_MCS },
{ 4, IFM_IEEE80211_MCS },
{ 5, IFM_IEEE80211_MCS },
{ 6, IFM_IEEE80211_MCS },
{ 7, IFM_IEEE80211_MCS },
{ 8, IFM_IEEE80211_MCS },
{ 9, IFM_IEEE80211_MCS },
{ 10, IFM_IEEE80211_MCS },
{ 11, IFM_IEEE80211_MCS },
{ 12, IFM_IEEE80211_MCS },
{ 13, IFM_IEEE80211_MCS },
{ 14, IFM_IEEE80211_MCS },
{ 15, IFM_IEEE80211_MCS },
{ 16, IFM_IEEE80211_MCS },
{ 17, IFM_IEEE80211_MCS },
{ 18, IFM_IEEE80211_MCS },
{ 19, IFM_IEEE80211_MCS },
{ 20, IFM_IEEE80211_MCS },
{ 21, IFM_IEEE80211_MCS },
{ 22, IFM_IEEE80211_MCS },
{ 23, IFM_IEEE80211_MCS },
{ 24, IFM_IEEE80211_MCS },
{ 25, IFM_IEEE80211_MCS },
{ 26, IFM_IEEE80211_MCS },
{ 27, IFM_IEEE80211_MCS },
{ 28, IFM_IEEE80211_MCS },
{ 29, IFM_IEEE80211_MCS },
{ 30, IFM_IEEE80211_MCS },
{ 31, IFM_IEEE80211_MCS },
{ 32, IFM_IEEE80211_MCS },
{ 33, IFM_IEEE80211_MCS },
{ 34, IFM_IEEE80211_MCS },
{ 35, IFM_IEEE80211_MCS },
{ 36, IFM_IEEE80211_MCS },
{ 37, IFM_IEEE80211_MCS },
{ 38, IFM_IEEE80211_MCS },
{ 39, IFM_IEEE80211_MCS },
{ 40, IFM_IEEE80211_MCS },
{ 41, IFM_IEEE80211_MCS },
{ 42, IFM_IEEE80211_MCS },
{ 43, IFM_IEEE80211_MCS },
{ 44, IFM_IEEE80211_MCS },
{ 45, IFM_IEEE80211_MCS },
{ 46, IFM_IEEE80211_MCS },
{ 47, IFM_IEEE80211_MCS },
{ 48, IFM_IEEE80211_MCS },
{ 49, IFM_IEEE80211_MCS },
{ 50, IFM_IEEE80211_MCS },
{ 51, IFM_IEEE80211_MCS },
{ 52, IFM_IEEE80211_MCS },
{ 53, IFM_IEEE80211_MCS },
{ 54, IFM_IEEE80211_MCS },
{ 55, IFM_IEEE80211_MCS },
{ 56, IFM_IEEE80211_MCS },
{ 57, IFM_IEEE80211_MCS },
{ 58, IFM_IEEE80211_MCS },
{ 59, IFM_IEEE80211_MCS },
{ 60, IFM_IEEE80211_MCS },
{ 61, IFM_IEEE80211_MCS },
{ 62, IFM_IEEE80211_MCS },
{ 63, IFM_IEEE80211_MCS },
{ 64, IFM_IEEE80211_MCS },
{ 65, IFM_IEEE80211_MCS },
{ 66, IFM_IEEE80211_MCS },
{ 67, IFM_IEEE80211_MCS },
{ 68, IFM_IEEE80211_MCS },
{ 69, IFM_IEEE80211_MCS },
{ 70, IFM_IEEE80211_MCS },
{ 71, IFM_IEEE80211_MCS },
{ 72, IFM_IEEE80211_MCS },
{ 73, IFM_IEEE80211_MCS },
{ 74, IFM_IEEE80211_MCS },
{ 75, IFM_IEEE80211_MCS },
{ 76, IFM_IEEE80211_MCS },
};
int m;
/*
* Check 11n rates first for match as an MCS.
*/
if (mode == IEEE80211_MODE_11NA) {
if (rate & IEEE80211_RATE_MCS) {
rate &= ~IEEE80211_RATE_MCS;
m = findmedia(htrates, nitems(htrates), rate);
if (m != IFM_AUTO)
return m | IFM_IEEE80211_11NA;
}
} else if (mode == IEEE80211_MODE_11NG) {
/* NB: 12 is ambiguous, it will be treated as an MCS */
if (rate & IEEE80211_RATE_MCS) {
rate &= ~IEEE80211_RATE_MCS;
m = findmedia(htrates, nitems(htrates), rate);
if (m != IFM_AUTO)
return m | IFM_IEEE80211_11NG;
}
}
rate &= IEEE80211_RATE_VAL;
switch (mode) {
case IEEE80211_MODE_11A:
case IEEE80211_MODE_HALF: /* XXX good 'nuf */
case IEEE80211_MODE_QUARTER:
case IEEE80211_MODE_11NA:
case IEEE80211_MODE_TURBO_A:
case IEEE80211_MODE_STURBO_A:
return findmedia(rates, nitems(rates),
rate | IFM_IEEE80211_11A);
case IEEE80211_MODE_11B:
return findmedia(rates, nitems(rates),
rate | IFM_IEEE80211_11B);
case IEEE80211_MODE_FH:
return findmedia(rates, nitems(rates),
rate | IFM_IEEE80211_FH);
case IEEE80211_MODE_AUTO:
/* NB: ic may be NULL for some drivers */
if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
return findmedia(rates, nitems(rates),
rate | IFM_IEEE80211_FH);
/* NB: hack, 11g matches both 11b+11a rates */
/* fall thru... */
case IEEE80211_MODE_11G:
case IEEE80211_MODE_11NG:
case IEEE80211_MODE_TURBO_G:
return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
}
return IFM_AUTO;
}
int
ieee80211_media2rate(int mword)
{
static const int ieeerates[] = {
-1, /* IFM_AUTO */
0, /* IFM_MANUAL */
0, /* IFM_NONE */
2, /* IFM_IEEE80211_FH1 */
4, /* IFM_IEEE80211_FH2 */
2, /* IFM_IEEE80211_DS1 */
4, /* IFM_IEEE80211_DS2 */
11, /* IFM_IEEE80211_DS5 */
22, /* IFM_IEEE80211_DS11 */
44, /* IFM_IEEE80211_DS22 */
12, /* IFM_IEEE80211_OFDM6 */
18, /* IFM_IEEE80211_OFDM9 */
24, /* IFM_IEEE80211_OFDM12 */
36, /* IFM_IEEE80211_OFDM18 */
48, /* IFM_IEEE80211_OFDM24 */
72, /* IFM_IEEE80211_OFDM36 */
96, /* IFM_IEEE80211_OFDM48 */
108, /* IFM_IEEE80211_OFDM54 */
144, /* IFM_IEEE80211_OFDM72 */
0, /* IFM_IEEE80211_DS354k */
0, /* IFM_IEEE80211_DS512k */
6, /* IFM_IEEE80211_OFDM3 */
9, /* IFM_IEEE80211_OFDM4 */
54, /* IFM_IEEE80211_OFDM27 */
-1, /* IFM_IEEE80211_MCS */
};
return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
ieeerates[IFM_SUBTYPE(mword)] : 0;
}
/*
* The following hash function is adapted from "Hash Functions" by Bob Jenkins
* ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
*/
#define mix(a, b, c) \
do { \
a -= b; a -= c; a ^= (c >> 13); \
b -= c; b -= a; b ^= (a << 8); \
c -= a; c -= b; c ^= (b >> 13); \
a -= b; a -= c; a ^= (c >> 12); \
b -= c; b -= a; b ^= (a << 16); \
c -= a; c -= b; c ^= (b >> 5); \
a -= b; a -= c; a ^= (c >> 3); \
b -= c; b -= a; b ^= (a << 10); \
c -= a; c -= b; c ^= (b >> 15); \
} while (/*CONSTCOND*/0)
uint32_t
ieee80211_mac_hash(const struct ieee80211com *ic,
const uint8_t addr[IEEE80211_ADDR_LEN])
{
uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
b += addr[5] << 8;
b += addr[4];
a += addr[3] << 24;
a += addr[2] << 16;
a += addr[1] << 8;
a += addr[0];
mix(a, b, c);
return c;
}
#undef mix
char
ieee80211_channel_type_char(const struct ieee80211_channel *c)
{
if (IEEE80211_IS_CHAN_ST(c))
return 'S';
if (IEEE80211_IS_CHAN_108A(c))
return 'T';
if (IEEE80211_IS_CHAN_108G(c))
return 'G';
if (IEEE80211_IS_CHAN_HT(c))
return 'n';
if (IEEE80211_IS_CHAN_A(c))
return 'a';
if (IEEE80211_IS_CHAN_ANYG(c))
return 'g';
if (IEEE80211_IS_CHAN_B(c))
return 'b';
return 'f';
}
Reference in New Issue View Git Blame Copy Permalink