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madwifi/net80211/ieee80211_proto.c
mtaylor 4d5de4b5a2 This patch adds iwpriv values for setting the 
time in ms, or the number of beacons for the
beacon miss alarm.  If we haven't had a beacon
in this period, the alarm is sounded and 
action (i.e. roaming) is taken.

This patch changes the storage of the beacon
miss threshold to integral beacon count but 
corrects the previous intent.

The default beacon miss alarm is going to be
850ms which is half way between the two hard
coded limits that were there before.

The old hard coded limits assumed that the
beacon interval was 100ms and set the limit to
10 (1000ms) for software beacon miss timer 
and 7 for hardware beacon miss timer.

The new default is 850ms (the midpoint between
the two previous defaults).  This value is rounded
up to the next nearest beacon interval.

There is no upper bound on the beacon miss
threshold specified, since it may need to be
wildly inflated with 25ms beacon interval, or
wildly reduced with 1000ms beacon interval.

The minimum is still 2 beacons, regardless of
the beacon interval.



git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3314 0192ed92-7a03-0410-a25b-9323aeb14dbd
2008-01-30 23:50:16 +00:00

1965 lines
56 KiB
C
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/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002-2005 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $Id$
*/
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
/*
* IEEE 802.11 protocol support.
*/
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#include <linux/version.h>
#include <linux/kmod.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include "if_media.h"
#include <net80211/ieee80211_var.h>
/* XXX tunables */
#define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
#define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
const char *ieee80211_mgt_subtype_name[] = {
"assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
"probe_req", "probe_resp", "reserved#6", "reserved#7",
"beacon", "atim", "disassoc", "auth",
"deauth", "reserved#13", "reserved#14", "reserved#15"
};
EXPORT_SYMBOL(ieee80211_mgt_subtype_name);
const char *ieee80211_ctl_subtype_name[] = {
"reserved#0", "reserved#1", "reserved#2", "reserved#3",
"reserved#3", "reserved#5", "reserved#6", "reserved#7",
"reserved#8", "reserved#9", "ps_poll", "rts",
"cts", "ack", "cf_end", "cf_end_ack"
};
EXPORT_SYMBOL(ieee80211_ctl_subtype_name);
const char *ieee80211_state_name[IEEE80211_S_MAX] = {
"INIT", /* IEEE80211_S_INIT */
"SCAN", /* IEEE80211_S_SCAN */
"AUTH", /* IEEE80211_S_AUTH */
"ASSOC", /* IEEE80211_S_ASSOC */
"RUN" /* IEEE80211_S_RUN */
};
EXPORT_SYMBOL(ieee80211_state_name);
const char *ieee80211_wme_acnames[] = {
"WME_AC_BE",
"WME_AC_BK",
"WME_AC_VI",
"WME_AC_VO",
"WME_UPSD",
};
EXPORT_SYMBOL(ieee80211_wme_acnames);
static int ieee80211_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static void ieee80211_tx_timeout(unsigned long);
#ifdef ATH_SUPERG_XR
static void ieee80211_start_xrvap(unsigned long);
#endif
void ieee80211_auth_setup(void);
void
ieee80211_proto_attach(struct ieee80211com *ic)
{
ic->ic_protmode = IEEE80211_PROT_CTSONLY;
ic->ic_wme.wme_hipri_switch_hysteresis =
AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
/* initialize management frame handlers */
ic->ic_recv_mgmt = ieee80211_recv_mgmt;
ic->ic_send_mgmt = ieee80211_send_mgmt;
ieee80211_auth_setup();
}
void
ieee80211_proto_detach(struct ieee80211com *ic)
{
}
void
ieee80211_proto_vattach(struct ieee80211vap *vap)
{
#ifdef notdef
vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
#else
vap->iv_rtsthreshold = IEEE80211_RTS_MAX;
#endif
vap->iv_fragthreshold = 2346; /* XXX not used yet */
vap->iv_fixed_rate = IEEE80211_FIXED_RATE_NONE;
init_timer(&vap->iv_mgtsend);
init_timer(&vap->iv_xrvapstart);
init_timer(&vap->iv_swbmiss);
init_timer(&vap->iv_csa_timer);
vap->iv_mgtsend.function = ieee80211_tx_timeout;
vap->iv_mgtsend.data = (unsigned long) vap;
/* protocol state change handler */
vap->iv_newstate = ieee80211_newstate;
}
void
ieee80211_proto_vdetach(struct ieee80211vap *vap)
{
/*
* This should not be needed as we detach when reseting
* the state but be conservative here since the
* authenticator may do things like spawn kernel threads.
*/
if (vap->iv_auth->ia_detach)
vap->iv_auth->ia_detach(vap);
/*
* Detach any ACL'ator.
*/
if (vap->iv_acl != NULL)
vap->iv_acl->iac_detach(vap);
}
/*
* Simple-minded authenticator module support.
*/
#define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
/* XXX well-known names */
static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
"wlan_internal", /* IEEE80211_AUTH_NONE */
"wlan_internal", /* IEEE80211_AUTH_OPEN */
"wlan_internal", /* IEEE80211_AUTH_SHARED */
"wlan_xauth", /* IEEE80211_AUTH_8021X */
"wlan_internal", /* IEEE80211_AUTH_AUTO */
"wlan_xauth", /* IEEE80211_AUTH_WPA */
};
static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
static const struct ieee80211_authenticator auth_internal = {
.ia_name = "wlan_internal",
.ia_attach = NULL,
.ia_detach = NULL,
.ia_node_join = NULL,
.ia_node_leave = NULL,
};
/*
* Setup internal authenticators once; they are never unregistered.
*/
void
ieee80211_auth_setup(void)
{
ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
}
const struct ieee80211_authenticator *
ieee80211_authenticator_get(int auth)
{
if (auth >= IEEE80211_AUTH_MAX)
return NULL;
if (authenticators[auth] == NULL)
ieee80211_load_module(auth_modnames[auth]);
return authenticators[auth];
}
void
ieee80211_authenticator_register(int type,
const struct ieee80211_authenticator *auth)
{
if (type >= IEEE80211_AUTH_MAX)
return;
authenticators[type] = auth;
}
EXPORT_SYMBOL(ieee80211_authenticator_register);
void
ieee80211_authenticator_unregister(int type)
{
if (type >= IEEE80211_AUTH_MAX)
return;
authenticators[type] = NULL;
}
EXPORT_SYMBOL(ieee80211_authenticator_unregister);
/*
* Very simple-minded authenticator backend module support.
*/
/* XXX just one for now */
static const struct ieee80211_authenticator_backend *backend = NULL;
void
ieee80211_authenticator_backend_register(
const struct ieee80211_authenticator_backend *be)
{
printk(KERN_INFO "wlan: %s backend registered\n", be->iab_name);
backend = be;
}
EXPORT_SYMBOL(ieee80211_authenticator_backend_register);
void
ieee80211_authenticator_backend_unregister(
const struct ieee80211_authenticator_backend * be)
{
if (backend == be)
backend = NULL;
printk(KERN_INFO "wlan: %s backend unregistered\n",
be->iab_name);
}
EXPORT_SYMBOL(ieee80211_authenticator_backend_unregister);
const struct ieee80211_authenticator_backend *
ieee80211_authenticator_backend_get(const char *name)
{
return backend && strcmp(backend->iab_name, name) == 0 ? backend : NULL;
}
EXPORT_SYMBOL(ieee80211_authenticator_backend_get);
/*
* Very simple-minded ACL module support.
*/
/* XXX just one for now */
static const struct ieee80211_aclator *acl = NULL;
void
ieee80211_aclator_register(const struct ieee80211_aclator *iac)
{
printk(KERN_INFO "wlan: %s acl policy registered\n", iac->iac_name);
acl = iac;
}
EXPORT_SYMBOL(ieee80211_aclator_register);
void
ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
{
if (acl == iac)
acl = NULL;
printk(KERN_INFO "wlan: %s acl policy unregistered\n", iac->iac_name);
}
EXPORT_SYMBOL(ieee80211_aclator_unregister);
const struct ieee80211_aclator *
ieee80211_aclator_get(const char *name)
{
if (acl == NULL)
ieee80211_load_module("wlan_acl");
return acl && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
}
EXPORT_SYMBOL(ieee80211_aclator_get);
#ifdef IEEE80211_DEBUG
void
ieee80211_print_essid(const u_int8_t *essid, int len)
{
int i;
const u_int8_t *p;
if (len > IEEE80211_NWID_LEN)
len = IEEE80211_NWID_LEN;
/* determine printable or not */
for (i = 0, p = essid; i < len; i++, p++) {
if (*p < ' ' || *p > 0x7e)
break;
}
if (i == len) {
printk("\"");
for (i = 0, p = essid; i < len; i++, p++)
printk("%c", *p);
printk("\"");
} else {
printk("0x");
for (i = 0, p = essid; i < len; i++, p++)
printk("%02x", *p);
}
}
EXPORT_SYMBOL(ieee80211_print_essid);
void
ieee80211_dump_pkt(struct ieee80211com *ic,
const u_int8_t *buf, int len, int rate, int rssi)
{
const struct ieee80211_frame *wh;
int i;
wh = (const struct ieee80211_frame *)buf;
switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
case IEEE80211_FC1_DIR_NODS:
printk("NODS " MAC_FMT, MAC_ADDR(wh->i_addr2));
printk("->" MAC_FMT, MAC_ADDR(wh->i_addr1));
printk("(" MAC_FMT ")", MAC_ADDR(wh->i_addr3));
break;
case IEEE80211_FC1_DIR_TODS:
printk("TODS " MAC_FMT, MAC_ADDR(wh->i_addr2));
printk("->" MAC_FMT, MAC_ADDR(wh->i_addr3));
printk("(" MAC_FMT ")", MAC_ADDR(wh->i_addr1));
break;
case IEEE80211_FC1_DIR_FROMDS:
printk("FRDS " MAC_FMT, MAC_ADDR(wh->i_addr3));
printk("->" MAC_FMT, MAC_ADDR(wh->i_addr1));
printk("(" MAC_FMT ")", MAC_ADDR(wh->i_addr2));
break;
case IEEE80211_FC1_DIR_DSTODS:
printk("DSDS " MAC_FMT, MAC_ADDR((u_int8_t *)&wh[1]));
printk("->" MAC_FMT, MAC_ADDR(wh->i_addr3));
printk("(" MAC_FMT, MAC_ADDR(wh->i_addr2));
printk("->" MAC_FMT ")", MAC_ADDR(wh->i_addr1));
break;
}
switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
case IEEE80211_FC0_TYPE_DATA:
printk(" data");
break;
case IEEE80211_FC0_TYPE_MGT:
printk(" %s", ieee80211_mgt_subtype_name[
(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
>> IEEE80211_FC0_SUBTYPE_SHIFT]);
break;
default:
printk(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
break;
}
if (IEEE80211_QOS_HAS_SEQ(wh)) {
const struct ieee80211_qosframe *qwh =
(const struct ieee80211_qosframe *)buf;
printk(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
}
if (wh->i_fc[1] & IEEE80211_FC1_PROT) {
int off;
off = ieee80211_anyhdrspace(ic, wh);
printk(" WEP [IV %.02x %.02x %.02x",
buf[off+0], buf[off+1], buf[off+2]);
if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
printk(" %.02x %.02x %.02x",
buf[off+4], buf[off+5], buf[off+6]);
printk(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
}
if (rate >= 0)
printk(" %dM", rate / 2);
if (rssi >= 0)
printk(" +%d", rssi);
printk("\n");
if (len > 0) {
for (i = 0; i < len; i++) {
if ((i % 8) == 0)
printk(" ");
if ((i % 16) == 0)
printk("\n");
printk("%02x ", buf[i]);
}
printk("\n\n");
}
}
EXPORT_SYMBOL(ieee80211_dump_pkt);
#endif
int
ieee80211_fix_rate(struct ieee80211_node *ni, int flags)
{
#define RV(v) ((v) & IEEE80211_RATE_VAL)
struct ieee80211vap *vap = ni->ni_vap;
struct ieee80211com *ic = ni->ni_ic;
int i, j, ignore, error;
int okrate, badrate, fixedrate;
struct ieee80211_rateset *srs, *nrs;
u_int8_t r;
error = 0;
okrate = badrate = fixedrate = 0;
srs = &ic->ic_sup_rates[ieee80211_chan2mode(ni->ni_chan)];
nrs = &ni->ni_rates;
fixedrate = IEEE80211_FIXED_RATE_NONE;
for (i = 0; i < nrs->rs_nrates;) {
ignore = 0;
if (flags & IEEE80211_F_DOSORT) {
/*
* Sort rates.
*/
for (j = i + 1; j < nrs->rs_nrates; j++) {
if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
r = nrs->rs_rates[i];
nrs->rs_rates[i] = nrs->rs_rates[j];
nrs->rs_rates[j] = r;
}
}
}
r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
badrate = r;
/*
* remove 0 rates
* they don't make sense and can lead to trouble later
*/
if (r == 0) {
nrs->rs_nrates--;
for (j = i; j < nrs->rs_nrates; j++)
nrs->rs_rates[j] = nrs->rs_rates[j + 1];
nrs->rs_rates[j] = 0;
continue;
}
/*
* Check for fixed rate.
*/
if (r == vap->iv_fixed_rate)
fixedrate = r;
if (flags & IEEE80211_F_DONEGO) {
/*
* Check against supported rates.
*/
for (j = 0; j < srs->rs_nrates; j++) {
if (r == RV(srs->rs_rates[j])) {
/*
* Overwrite with the supported rate
* value so any basic rate bit is set.
* This ensures that response we send
* to stations have the necessary basic
* rate bit set.
*/
nrs->rs_rates[i] = srs->rs_rates[j];
break;
}
}
if (j == srs->rs_nrates) {
/*
* A rate in the node's rate set is not
* supported. If this is a basic rate and we
* are operating as an AP then this is an error.
* Otherwise we just discard/ignore the rate.
* Note that this is important for 11b stations
* when they want to associate with an 11g AP.
*/
if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
(nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
error++;
ignore++;
}
}
if (flags & IEEE80211_F_DODEL) {
/*
* Delete unacceptable rates.
*/
if (ignore) {
nrs->rs_nrates--;
for (j = i; j < nrs->rs_nrates; j++)
nrs->rs_rates[j] = nrs->rs_rates[j + 1];
nrs->rs_rates[j] = 0;
continue;
}
}
if (!ignore)
okrate = nrs->rs_rates[i];
i++;
}
if (okrate == 0 || error != 0 ||
((flags & IEEE80211_F_DOFRATE) && fixedrate != vap->iv_fixed_rate))
return badrate | IEEE80211_RATE_BASIC;
else
return RV(okrate);
#undef RV
}
/*
* Reset 11g-related state.
*/
void
ieee80211_reset_erp(struct ieee80211com *ic, enum ieee80211_phymode mode)
{
#define IS_11G(m) \
((m) == IEEE80211_MODE_11G || (m) == IEEE80211_MODE_TURBO_G)
ic->ic_flags &= ~IEEE80211_F_USEPROT;
/*
* Preserve the long slot and nonerp station count if
* switching between 11g and turboG. Otherwise, inactivity
* will cause the turbo station to disassociate and possibly
* try to leave the network.
* XXX not right if really trying to reset state
*/
if (IS_11G(mode) ^ IS_11G(ic->ic_curmode)) {
ic->ic_nonerpsta = 0;
ic->ic_longslotsta = 0;
}
/*
* Short slot time is enabled only when operating in 11g
* and not in an IBSS. We must also honor whether or not
* the driver is capable of doing it.
*/
ieee80211_set_shortslottime(ic,
IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
(IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
ic->ic_opmode == IEEE80211_M_HOSTAP &&
(ic->ic_caps & IEEE80211_C_SHSLOT)));
/*
* Set short preamble and ERP barker-preamble flags.
*/
if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
(ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
ic->ic_flags &= ~IEEE80211_F_USEBARKER;
} else {
ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
ic->ic_flags |= IEEE80211_F_USEBARKER;
}
#undef IS_11G
}
/*
* Set the short slot time state and notify the driver.
*/
void
ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
{
if (onoff)
ic->ic_flags |= IEEE80211_F_SHSLOT;
else
ic->ic_flags &= ~IEEE80211_F_SHSLOT;
/* notify driver */
if (ic->ic_updateslot != NULL)
ic->ic_updateslot(ic->ic_dev);
}
/*
* Check if the specified rate set supports ERP.
* NB: the rate set is assumed to be sorted.
*/
int
ieee80211_iserp_rateset(struct ieee80211com *ic, struct ieee80211_rateset *rs)
{
static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
int i, j;
if (rs->rs_nrates < ARRAY_SIZE(rates))
return 0;
for (i = 0; i < ARRAY_SIZE(rates); i++) {
for (j = 0; j < rs->rs_nrates; j++) {
int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
if (rates[i] == r)
goto next;
if (r > rates[i])
return 0;
}
return 0;
next:
;
}
return 1;
}
static const struct ieee80211_rateset basic11g[IEEE80211_MODE_MAX] = {
{ 0 }, /* IEEE80211_MODE_AUTO */
{ 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */
{ 2, { 2, 4 } }, /* IEEE80211_MODE_11B */
{ 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11G (mixed b/g) */
{ 0 }, /* IEEE80211_MODE_FH */
{ 3, { 12, 24, 48 } }, /* IEEE80211_MODE_TURBO_A */
{ 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_TURBO_G (mixed b/g) */
};
/*
* Mark the basic rates for the 11g rate table based on the
* specified mode. For 11b compatibility we mark only 11b
* rates. There's also a pseudo 11a-mode used to mark only
* the basic OFDM rates; this is used to exclude 11b stations
* from an 11g bss.
*/
void
ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
{
int i, j;
KASSERT(mode < IEEE80211_MODE_MAX, ("invalid mode %u", mode));
for (i = 0; i < rs->rs_nrates; i++) {
rs->rs_rates[i] &= IEEE80211_RATE_VAL;
for (j = 0; j < basic11g[mode].rs_nrates; j++)
if (basic11g[mode].rs_rates[j] == rs->rs_rates[i]) {
rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
break;
}
}
}
/*
* Deduce the 11g setup by examining the rates
* that are marked basic.
*/
enum ieee80211_phymode
ieee80211_get11gbasicrates(struct ieee80211_rateset *rs)
{
struct ieee80211_rateset basic;
int i;
memset(&basic, 0, sizeof(basic));
for (i = 0; i < rs->rs_nrates; i++)
if (rs->rs_rates[i] & IEEE80211_RATE_BASIC)
basic.rs_rates[basic.rs_nrates++] =
rs->rs_rates[i] & IEEE80211_RATE_VAL;
for (i = 0; i < IEEE80211_MODE_MAX; i++)
if (memcmp(&basic, &basic11g[i], sizeof(basic)) == 0)
return i;
return IEEE80211_MODE_AUTO;
}
void
ieee80211_wme_initparams(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
IEEE80211_LOCK_IRQ(ic);
ieee80211_wme_initparams_locked(vap);
IEEE80211_UNLOCK_IRQ(ic);
}
void
ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_wme_state *wme = &ic->ic_wme;
struct phyParamType {
u_int8_t aifsn;
u_int8_t logcwmin;
u_int8_t logcwmax;
u_int16_t txopLimit;
u_int8_t acm;
};
enum ieee80211_phymode mode;
struct phyParamType *pPhyParam, *pBssPhyParam;
static struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 3, 4, 6, 0, 0 },
/* IEEE80211_MODE_11A */ { 3, 4, 6, 0, 0 },
/* IEEE80211_MODE_11B */ { 3, 5, 7, 0, 0 },
/* IEEE80211_MODE_11G */ { 3, 4, 6, 0, 0 },
/* IEEE80211_MODE_FH */ { 3, 5, 7, 0, 0 },
/* IEEE80211_MODE_TURBO */ { 2, 3, 5, 0, 0 },
/* IEEE80211_MODE_TURBO */ { 2, 3, 5, 0, 0 }};
static struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 7, 4, 10, 0, 0 },
/* IEEE80211_MODE_11A */ { 7, 4, 10, 0, 0 },
/* IEEE80211_MODE_11B */ { 7, 5, 10, 0, 0 },
/* IEEE80211_MODE_11G */ { 7, 4, 10, 0, 0 },
/* IEEE80211_MODE_FH */ { 7, 5, 10, 0, 0 },
/* IEEE80211_MODE_TURBO */ { 7, 3, 10, 0, 0 },
/* IEEE80211_MODE_TURBO */ { 7, 3, 10, 0, 0 }};
static struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 1, 3, 4, 94, 0 },
/* IEEE80211_MODE_11A */ { 1, 3, 4, 94, 0 },
/* IEEE80211_MODE_11B */ { 1, 4, 5, 188, 0 },
/* IEEE80211_MODE_11G */ { 1, 3, 4, 94, 0 },
/* IEEE80211_MODE_FH */ { 1, 4, 5, 188, 0 },
/* IEEE80211_MODE_TURBO */ { 1, 2, 3, 94, 0 },
/* IEEE80211_MODE_TURBO */ { 1, 2, 3, 94, 0 }};
static struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 1, 2, 3, 47, 0 },
/* IEEE80211_MODE_11A */ { 1, 2, 3, 47, 0 },
/* IEEE80211_MODE_11B */ { 1, 3, 4, 102, 0 },
/* IEEE80211_MODE_11G */ { 1, 2, 3, 47, 0 },
/* IEEE80211_MODE_FH */ { 1, 3, 4, 102, 0 },
/* IEEE80211_MODE_TURBO */ { 1, 2, 2, 47, 0 },
/* IEEE80211_MODE_TURBO */ { 1, 2, 2, 47, 0 }};
static struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 3, 4, 10, 0, 0 },
/* IEEE80211_MODE_11A */ { 3, 4, 10, 0, 0 },
/* IEEE80211_MODE_11B */ { 3, 5, 10, 0, 0 },
/* IEEE80211_MODE_11G */ { 3, 4, 10, 0, 0 },
/* IEEE80211_MODE_FH */ { 3, 5, 10, 0, 0 },
/* IEEE80211_MODE_TURBO */ { 2, 3, 10, 0, 0 },
/* IEEE80211_MODE_TURBO */ { 2, 3, 10, 0, 0 }};
static struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 2, 3, 4, 94, 0 },
/* IEEE80211_MODE_11A */ { 2, 3, 4, 94, 0 },
/* IEEE80211_MODE_11B */ { 2, 4, 5, 188, 0 },
/* IEEE80211_MODE_11G */ { 2, 3, 4, 94, 0 },
/* IEEE80211_MODE_FH */ { 2, 4, 5, 188, 0 },
/* IEEE80211_MODE_TURBO */ { 2, 2, 3, 94, 0 },
/* IEEE80211_MODE_TURBO */ { 2, 2, 3, 94, 0 }};
static struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 2, 2, 3, 47, 0 },
/* IEEE80211_MODE_11A */ { 2, 2, 3, 47, 0 },
/* IEEE80211_MODE_11B */ { 2, 3, 4, 102, 0 },
/* IEEE80211_MODE_11G */ { 2, 2, 3, 47, 0 },
/* IEEE80211_MODE_FH */ { 2, 3, 4, 102, 0 },
/* IEEE80211_MODE_TURBO */ { 1, 2, 2, 47, 0 },
/* IEEE80211_MODE_TURBO */ { 1, 2, 2, 47, 0 }};
int i;
IEEE80211_LOCK_ASSERT(ic);
if ((ic->ic_caps & IEEE80211_C_WME) == 0)
return;
/*
* Select mode; we can be called early in which case we
* always use auto mode. We know we'll be called when
* entering the RUN state with bsschan setup properly
* so state will eventually get set correctly
*/
if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
mode = ieee80211_chan2mode(ic->ic_bsschan);
else
mode = IEEE80211_MODE_AUTO;
for (i = 0; i < WME_NUM_AC; i++) {
switch (i) {
case WME_AC_BK:
pPhyParam = &phyParamForAC_BK[mode];
pBssPhyParam = &phyParamForAC_BK[mode];
break;
case WME_AC_VI:
pPhyParam = &phyParamForAC_VI[mode];
pBssPhyParam = &bssPhyParamForAC_VI[mode];
break;
case WME_AC_VO:
pPhyParam = &phyParamForAC_VO[mode];
pBssPhyParam = &bssPhyParamForAC_VO[mode];
break;
case WME_AC_BE:
default:
pPhyParam = &phyParamForAC_BE[mode];
pBssPhyParam = &bssPhyParamForAC_BE[mode];
break;
}
if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_acm =
pPhyParam->acm;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_aifsn =
pPhyParam->aifsn;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_logcwmin =
pPhyParam->logcwmin;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_logcwmax =
pPhyParam->logcwmax;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_txopLimit =
pPhyParam->txopLimit;
} else {
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_acm =
pBssPhyParam->acm;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_aifsn =
pBssPhyParam->aifsn;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_logcwmin =
pBssPhyParam->logcwmin;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_logcwmax =
pBssPhyParam->logcwmax;
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_txopLimit =
pBssPhyParam->txopLimit;
}
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_acm =
pBssPhyParam->acm;
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_aifsn =
pBssPhyParam->aifsn;
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_logcwmin =
pBssPhyParam->logcwmin;
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_logcwmax =
pBssPhyParam->logcwmax;
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_txopLimit =
pBssPhyParam->txopLimit;
}
/* NB: check ic_bss to avoid NULL deref on initial attach */
if (vap->iv_bss != NULL) {
/*
* Calculate aggressive mode switching threshold based
* on beacon interval.
*/
wme->wme_hipri_switch_thresh =
(HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
ieee80211_wme_updateparams_locked(vap);
}
}
/*
* Update WME parameters for ourself and the BSS.
*/
void
ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
{
static const struct { u_int8_t aifsn; u_int8_t logcwmin; u_int8_t logcwmax; u_int16_t txopLimit;}
phyParam[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ { 2, 4, 10, 64 },
/* IEEE80211_MODE_11A */ { 2, 4, 10, 64 },
/* IEEE80211_MODE_11B */ { 2, 5, 10, 64 },
/* IEEE80211_MODE_11G */ { 2, 4, 10, 64 },
/* IEEE80211_MODE_FH */ { 2, 5, 10, 64 },
/* IEEE80211_MODE_TURBO */ { 1, 3, 10, 64 }};
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_wme_state *wme = &ic->ic_wme;
enum ieee80211_phymode mode;
int i;
IEEE80211_LOCK_ASSERT(vap->iv_ic);
/* set up the channel access parameters for the physical device */
for (i = 0; i < WME_NUM_AC; i++) {
wme->wme_chanParams.cap_wmeParams[i].wmep_aifsn =
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_aifsn;
wme->wme_chanParams.cap_wmeParams[i].wmep_logcwmin =
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_logcwmin;
wme->wme_chanParams.cap_wmeParams[i].wmep_logcwmax =
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_logcwmax;
wme->wme_chanParams.cap_wmeParams[i].wmep_txopLimit =
wme->wme_wmeChanParams.cap_wmeParams[i].wmep_txopLimit;
wme->wme_bssChanParams.cap_wmeParams[i].wmep_aifsn =
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_aifsn;
wme->wme_bssChanParams.cap_wmeParams[i].wmep_logcwmin =
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_logcwmin;
wme->wme_bssChanParams.cap_wmeParams[i].wmep_logcwmax =
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_logcwmax;
wme->wme_bssChanParams.cap_wmeParams[i].wmep_txopLimit =
wme->wme_wmeBssChanParams.cap_wmeParams[i].wmep_txopLimit;
}
/*
* Select mode; we can be called early in which case we
* always use auto mode. We know we'll be called when
* entering the RUN state with bsschan setup properly
* so state will eventually get set correctly
*/
if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
mode = ieee80211_chan2mode(ic->ic_bsschan);
else
mode = IEEE80211_MODE_AUTO;
if ((vap->iv_opmode == IEEE80211_M_HOSTAP &&
(wme->wme_flags & WME_F_AGGRMODE) != 0) ||
(vap->iv_opmode != IEEE80211_M_HOSTAP &&
(vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
(vap->iv_flags & IEEE80211_F_WME) == 0) {
struct ieee80211vap *tmpvap;
u_int8_t burstEnabled = 0;
/* check if bursting enabled on at least one vap */
TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
if (tmpvap->iv_ath_cap & IEEE80211_ATHC_BURST) {
burstEnabled = 1;
break;
}
}
wme->wme_chanParams.cap_wmeParams[WME_AC_BE].wmep_aifsn =
phyParam[mode].aifsn;
wme->wme_chanParams.cap_wmeParams[WME_AC_BE].wmep_logcwmin =
phyParam[mode].logcwmin;
wme->wme_chanParams.cap_wmeParams[WME_AC_BE].wmep_logcwmax =
phyParam[mode].logcwmax;
wme->wme_chanParams.cap_wmeParams[WME_AC_BE].wmep_txopLimit =
burstEnabled ? phyParam[mode].txopLimit : 0;
wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE].wmep_aifsn =
phyParam[mode].aifsn;
wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE].wmep_logcwmin =
phyParam[mode].logcwmin;
wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE].wmep_logcwmax =
phyParam[mode].logcwmax;
wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE].wmep_txopLimit =
burstEnabled ? phyParam[mode].txopLimit : 0;
}
if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
static const u_int8_t logCwMin[IEEE80211_MODE_MAX] = {
/* IEEE80211_MODE_AUTO */ 3,
/* IEEE80211_MODE_11A */ 3,
/* IEEE80211_MODE_11B */ 4,
/* IEEE80211_MODE_11G */ 3,
/* IEEE80211_MODE_FH */ 4,
/* IEEE80211_MODE_TURBO_A */ 3,
/* IEEE80211_MODE_TURBO_G */ 3
};
wme->wme_chanParams.cap_wmeParams[WME_AC_BE].wmep_logcwmin =
wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE].wmep_logcwmin =
logCwMin[mode];
}
if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */
/*
* Arrange for a beacon update and bump the parameter
* set number so associated stations load the new values.
*/
wme->wme_bssChanParams.cap_info_count =
(wme->wme_bssChanParams.cap_info_count + 1) & WME_QOSINFO_COUNT;
vap->iv_flags |= IEEE80211_F_WMEUPDATE;
}
wme->wme_update(ic);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
"%s: WME params updated, cap_info 0x%x\n", __func__,
vap->iv_opmode == IEEE80211_M_STA ?
wme->wme_wmeChanParams.cap_info_count :
wme->wme_bssChanParams.cap_info_count);
}
EXPORT_SYMBOL(ieee80211_wme_updateparams);
void
ieee80211_wme_updateparams(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
if (ic->ic_caps & IEEE80211_C_WME) {
IEEE80211_LOCK_IRQ(ic);
ieee80211_wme_updateparams_locked(vap);
IEEE80211_UNLOCK_IRQ(ic);
}
}
/*
* Start a vap. If this is the first vap running on the
* underlying device then we first bring it up.
*/
int
ieee80211_init(struct net_device *dev, int forcescan)
{
#define IS_RUNNING(_dev) \
((_dev->flags & (IFF_RUNNING|IFF_UP)) == (IFF_RUNNING|IFF_UP))
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
struct net_device *parent = ic->ic_dev;
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
"start running (state=%d)\n", vap->iv_state);
if ((dev->flags & IFF_RUNNING) == 0) {
if (ic->ic_nopened++ == 0 &&
(parent->flags & IFF_RUNNING) == 0)
dev_open(parent);
/*
* Mark us running. Note that we do this after
* opening the parent device to avoid recursion.
*/
dev->flags |= IFF_RUNNING; /* mark us running */
}
/*
* If the parent is up and running, then kick the
* 802.11 state machine as appropriate.
* XXX parent should always be up+running
*/
if (IS_RUNNING(ic->ic_dev)) {
if (vap->iv_opmode == IEEE80211_M_STA) {
if(ic->ic_roaming != IEEE80211_ROAMING_MANUAL) {
/* Try to be intelligent about clocking the
* state machine. If we're currently in RUN
* state then we should be able to apply any
* new state/parameters simply by
* re-associating. Otherwise we need to
* re-scan to select an appropriate ap. */
if (vap->iv_state != IEEE80211_S_RUN ||
forcescan) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE |
IEEE80211_MSG_DEBUG,
"Bringing vap %p[%s] "
"to %s\n",
vap, vap->iv_nickname,
ieee80211_state_name
[IEEE80211_S_SCAN]);
ieee80211_new_state(vap,
IEEE80211_S_SCAN, 0);
} else {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE |
IEEE80211_MSG_DEBUG,
"Bringing vap %p[%s] "
"to %s\n",
vap, vap->iv_nickname,
ieee80211_state_name
[IEEE80211_S_ASSOC]);
ieee80211_new_state(vap,
IEEE80211_S_ASSOC, 1);
}
}
} else {
/*
* When the old state is running the vap must
* be brought to init.
*/
if (vap->iv_state == IEEE80211_S_RUN) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE |
IEEE80211_MSG_DEBUG,
"Bringing vap %p[%s] to %s\n",
vap, vap->iv_nickname,
ieee80211_state_name
[IEEE80211_S_INIT]);
ieee80211_new_state(vap,
IEEE80211_S_INIT, -1);
}
/*
* For monitor+wds modes there's nothing to do but
* start running. Otherwise, if this is the first
* vap to be brought up, start a scan which may be
* preempted if the station is locked to a particular
* channel.
*/
if (vap->iv_opmode == IEEE80211_M_MONITOR ||
vap->iv_opmode == IEEE80211_M_WDS) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE |
IEEE80211_MSG_DEBUG,
"Bringing vap %p[%s] to %s\n",
vap, vap->iv_nickname,
ieee80211_state_name
[IEEE80211_S_RUN]);
ieee80211_new_state(vap, IEEE80211_S_RUN, -1);
} else {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE |
IEEE80211_MSG_DEBUG,
"Bringing vap %p[%s] to %s\n",
vap, vap->iv_nickname,
ieee80211_state_name
[IEEE80211_S_SCAN]);
ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
}
}
}
return 0;
#undef IS_RUNNING
}
int
ieee80211_open(struct net_device *dev)
{
return ieee80211_init(dev, 0);
}
/*
* Start all runnable VAPs on a device.
*/
void
ieee80211_start_running(struct ieee80211com *ic)
{
struct ieee80211vap *vap;
struct net_device *dev;
/* XXX locking */
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
dev = vap->iv_dev;
/* NB: avoid recursion */
if ((dev->flags & IFF_UP) && !(dev->flags & IFF_RUNNING))
ieee80211_open(dev);
}
}
EXPORT_SYMBOL(ieee80211_start_running);
/*
* Stop a vap. We force it down using the state machine
* then mark its device not running. If this is the last
* vap running on the underlying device then we close it
* too to ensure it will be properly initialized when the
* next vap is brought up.
*/
int
ieee80211_stop(struct net_device *dev)
{
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
struct net_device *parent = ic->ic_dev;
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
"%s\n", "stop running");
ieee80211_new_state(vap, IEEE80211_S_INIT, -1);
if (dev->flags & IFF_RUNNING) {
dev->flags &= ~IFF_RUNNING; /* mark us stopped */
del_timer(&vap->iv_mgtsend);
if (--ic->ic_nopened == 0 && (parent->flags & IFF_RUNNING))
dev_close(parent);
}
#ifdef ATH_SUPERG_XR
/*
* also stop the XR vap.
*/
if (vap->iv_xrvap && !(vap->iv_flags & IEEE80211_F_XR)) {
ieee80211_stop(vap->iv_xrvap->iv_dev);
del_timer(&vap->iv_xrvapstart);
vap->iv_xrvap->iv_dev->flags = dev->flags;
}
#endif
return 0;
}
EXPORT_SYMBOL(ieee80211_stop);
/*
* Stop all VAPs running on a device.
*/
void
ieee80211_stop_running(struct ieee80211com *ic)
{
struct ieee80211vap *vap;
struct net_device *dev;
/* XXX locking */
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
dev = vap->iv_dev;
if (dev->flags & IFF_RUNNING) /* NB: avoid recursion */
ieee80211_stop(dev);
}
}
EXPORT_SYMBOL(ieee80211_stop_running);
#ifdef ATH_SUPERG_DYNTURBO
/*
* Switch between turbo and non-turbo operating modes.
* Use the specified channel flags to locate the new
* channel, update 802.11 state, and then call back into
* the driver to effect the change.
*/
void
ieee80211_dturbo_switch(struct ieee80211com *ic, int newflags)
{
#ifdef IEEE80211_DEBUG
/* XXX use first vap for debug flags */
struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
#endif
struct ieee80211_channel *chan;
chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags);
if (chan == NULL) { /* XXX should not happen */
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPG,
"%s: no channel with freq %u flags 0x%x\n",
__func__, ic->ic_bsschan->ic_freq, newflags);
return;
}
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPG,
"%s: %s -> %s (freq %u flags 0x%x)\n", __func__,
ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)],
ieee80211_phymode_name[ieee80211_chan2mode(chan)],
chan->ic_freq, chan->ic_flags);
ic->ic_bsschan = chan;
ic->ic_curchan = chan;
ic->ic_set_channel(ic);
/* NB: do not need to reset ERP state because in sta mode */
}
EXPORT_SYMBOL(ieee80211_dturbo_switch);
#endif /* ATH_SUPERG_DYNTURBO */
void
ieee80211_beacon_miss(struct ieee80211com *ic)
{
struct ieee80211vap *vap;
if (ic->ic_flags & IEEE80211_F_SCAN) {
/* XXX check ic_curchan != ic_bsschan? */
return;
}
/* XXX locking */
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
"%s\n", "beacon miss");
/*
* Our handling is only meaningful for stations that are
* associated; any other conditions else will be handled
* through different means (e.g. the tx timeout on mgt frames).
*/
if (vap->iv_opmode != IEEE80211_M_STA ||
vap->iv_state != IEEE80211_S_RUN)
continue;
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
#ifdef ATH_SUPERG_DYNTURBO
/*
* If we receive a beacon miss interrupt when using
* dynamic turbo, attempt to switch modes before
* reassociating.
*/
if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_ATHC_TURBOP))
ieee80211_dturbo_switch(ic,
ic->ic_bsschan->ic_flags ^
IEEE80211_CHAN_TURBO);
#endif /* ATH_SUPERG_DYNTURBO */
/*
* Try to reassociate before scanning for a new ap.
*/
ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
} else {
/*
* Somebody else is controlling state changes (e.g.
* a user-mode app) don't do anything that would
* confuse them; just drop into scan mode so they'll
* notified of the state change and given control.
*/
ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
}
}
}
EXPORT_SYMBOL(ieee80211_beacon_miss);
/*
* STA software beacon timer callback. This is called
* only when we have a series beacon misses.
*/
static void
ieee80211_sta_swbmiss(unsigned long arg)
{
struct ieee80211vap *vap = (struct ieee80211vap *) arg;
ieee80211_beacon_miss(vap->iv_ic);
}
/*
* Per-ieee80211vap watchdog timer callback. This
* is used only to timeout the xmit of management frames.
*/
static void
ieee80211_tx_timeout(unsigned long arg)
{
struct ieee80211vap *vap = (struct ieee80211vap *) arg;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
"%s: state %s%s\n", __func__,
ieee80211_state_name[vap->iv_state],
vap->iv_ic->ic_flags & IEEE80211_F_SCAN ? ", scan active" : "");
if (vap->iv_state != IEEE80211_S_INIT &&
(vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
/*
* NB: it's safe to specify a timeout as the reason here;
* it'll only be used in the right state.
*/
ieee80211_new_state(vap, IEEE80211_S_SCAN,
IEEE80211_SCAN_FAIL_TIMEOUT);
}
}
static void
sta_disassoc(void *arg, struct ieee80211_node *ni)
{
struct ieee80211vap *vap = arg;
if (ni->ni_vap == vap && ni->ni_associd != 0) {
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
ieee80211_node_leave(ni);
}
}
static void
sta_deauth(void *arg, struct ieee80211_node *ni)
{
struct ieee80211vap *vap = arg;
if (ni->ni_vap == vap)
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_ASSOC_LEAVE);
}
/*
* Context: softIRQ (tasklet) and process
*/
int
ieee80211_new_state(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
struct ieee80211com *ic = vap->iv_ic;
int rc;
IEEE80211_VAPS_LOCK_BH(ic);
rc = vap->iv_newstate(vap, nstate, arg);
IEEE80211_VAPS_UNLOCK_BH(ic);
return rc;
}
static int
__ieee80211_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
struct ieee80211com *ic = vap->iv_ic;
struct ieee80211_node *ni;
enum ieee80211_state ostate;
ostate = vap->iv_state;
vap->iv_state = nstate; /* state transition */
del_timer(&vap->iv_mgtsend);
if ((vap->iv_opmode != IEEE80211_M_HOSTAP) &&
(ostate != IEEE80211_S_SCAN))
ieee80211_cancel_scan(vap); /* background scan */
ni = vap->iv_bss; /* NB: no reference held */
switch (nstate) {
case IEEE80211_S_INIT:
switch (ostate) {
case IEEE80211_S_INIT:
break;
case IEEE80211_S_RUN:
switch (vap->iv_opmode) {
case IEEE80211_M_STA:
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
ieee80211_sta_leave(ni);
break;
case IEEE80211_M_HOSTAP:
ieee80211_iterate_nodes(&ic->ic_sta,
sta_disassoc, vap);
break;
default:
break;
}
goto reset;
case IEEE80211_S_ASSOC:
switch (vap->iv_opmode) {
case IEEE80211_M_STA:
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_AUTH_LEAVE);
break;
case IEEE80211_M_HOSTAP:
ieee80211_iterate_nodes(&ic->ic_sta,
sta_deauth, vap);
break;
default:
break;
}
goto reset;
case IEEE80211_S_SCAN:
ieee80211_cancel_scan(vap);
goto reset;
case IEEE80211_S_AUTH:
reset:
ieee80211_reset_bss(vap);
break;
}
if (vap->iv_auth->ia_detach != NULL)
vap->iv_auth->ia_detach(vap);
break;
case IEEE80211_S_SCAN:
switch (ostate) {
case IEEE80211_S_INIT:
createibss:
if ((vap->iv_opmode == IEEE80211_M_HOSTAP ||
vap->iv_opmode == IEEE80211_M_IBSS ||
vap->iv_opmode == IEEE80211_M_AHDEMO) &&
vap->iv_des_chan != IEEE80211_CHAN_ANYC) {
/*
* AP operation and we already have a channel;
* bypass the scan and startup immediately.
*/
ieee80211_create_ibss(vap, vap->iv_des_chan);
} else {
ieee80211_check_scan(vap,
IEEE80211_SCAN_ACTIVE |
IEEE80211_SCAN_FLUSH,
IEEE80211_SCAN_FOREVER,
vap->iv_des_nssid, vap->iv_des_ssid,
NULL);
}
break;
case IEEE80211_S_SCAN:
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
/*
* These can happen either because of a timeout
* on an assoc/auth response or because of a
* change in state that requires a reset. For
* the former we're called with a non-zero arg
* that is the cause for the failure; pass this
* to the scan code so it can update state.
* Otherwise trigger a new scan unless we're in
* manual roaming mode in which case an application
* must issue an explicit scan request.
*/
if (arg != 0)
ieee80211_scan_assoc_fail(ic,
vap->iv_bss->ni_macaddr, arg);
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
ieee80211_check_scan(vap,
IEEE80211_SCAN_ACTIVE,
IEEE80211_SCAN_FOREVER,
vap->iv_des_nssid, vap->iv_des_ssid,
NULL);
break;
case IEEE80211_S_RUN: /* beacon miss */
if (vap->iv_opmode == IEEE80211_M_STA) {
ieee80211_sta_leave(ni);
vap->iv_flags &= ~IEEE80211_F_SIBSS; /* XXX */
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
ieee80211_check_scan(vap,
IEEE80211_SCAN_ACTIVE,
IEEE80211_SCAN_FOREVER,
vap->iv_des_nssid,
vap->iv_des_ssid,
NULL);
} else {
ieee80211_iterate_nodes(&ic->ic_sta,
sta_disassoc, vap);
goto createibss;
}
break;
}
break;
case IEEE80211_S_AUTH:
/* auth frames are possible between IBSS nodes,
* see 802.11-1999, chapter 5.7.6 */
KASSERT(vap->iv_opmode == IEEE80211_M_STA ||
vap->iv_opmode == IEEE80211_M_IBSS,
("switch to %s state when operating in mode %u",
ieee80211_state_name[nstate], vap->iv_opmode));
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1);
break;
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
switch (arg) {
case IEEE80211_FC0_SUBTYPE_AUTH:
/* ??? */
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_AUTH, 2);
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_AUTH, 1);
break;
}
break;
case IEEE80211_S_RUN:
switch (arg) {
case IEEE80211_FC0_SUBTYPE_AUTH:
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_AUTH, 2);
vap->iv_state = ostate; /* stay RUN */
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
ieee80211_sta_leave(ni);
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
/* try to reauth */
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_AUTH, 1);
}
break;
}
break;
}
break;
case IEEE80211_S_ASSOC:
KASSERT(vap->iv_opmode == IEEE80211_M_STA,
("switch to %s state when operating in mode %u",
ieee80211_state_name[nstate], vap->iv_opmode));
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
"%s: invalid transition\n", __func__);
break;
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
IEEE80211_SEND_MGMT(ni,
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
break;
case IEEE80211_S_RUN:
ieee80211_sta_leave(ni);
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
/* NB: caller specifies ASSOC/REASSOC by arg */
IEEE80211_SEND_MGMT(ni, arg ?
IEEE80211_FC0_SUBTYPE_REASSOC_REQ :
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
}
break;
}
break;
case IEEE80211_S_RUN:
if (vap->iv_flags & IEEE80211_F_WPA) {
/* XXX validate prerequisites */
}
switch (ostate) {
case IEEE80211_S_INIT:
if (vap->iv_opmode == IEEE80211_M_MONITOR ||
vap->iv_opmode == IEEE80211_M_WDS ||
vap->iv_opmode == IEEE80211_M_HOSTAP) {
/*
* Already have a channel; bypass the
* scan and startup immediately.
*/
ieee80211_create_ibss(vap, ic->ic_curchan);
/* In WDS mode, allocate and initialize peer node. */
if (vap->iv_opmode == IEEE80211_M_WDS) {
/* XXX: This is horribly non-atomic. */
struct ieee80211_node *wds_ni =
ieee80211_find_node(&ic->ic_sta,
vap->wds_mac);
if (wds_ni == NULL) {
wds_ni = ieee80211_alloc_node_table(
vap,
vap->wds_mac);
if (wds_ni != NULL) {
ieee80211_add_wds_addr(
&ic->ic_sta,
wds_ni,
vap->wds_mac,
1);
ieee80211_ref_node(wds_ni); /* pin in memory */
}
else
IEEE80211_DPRINTF(
vap,
IEEE80211_MSG_NODE,
"%s: Unable to "
"allocate node for "
"WDS: " MAC_FMT "\n",
__func__,
MAC_ADDR(
vap->wds_mac)
);
}
if (wds_ni != NULL) {
ieee80211_node_authorize(wds_ni);
wds_ni->ni_chan =
vap->iv_bss->ni_chan;
wds_ni->ni_capinfo =
ni->ni_capinfo;
wds_ni->ni_associd = 1;
wds_ni->ni_ath_flags =
vap->iv_ath_cap;
}
}
break;
}
/* fall thru... */
case IEEE80211_S_AUTH:
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
"%s: invalid transition\n", __func__);
break;
case IEEE80211_S_RUN:
break;
case IEEE80211_S_SCAN: /* adhoc/hostap mode */
case IEEE80211_S_ASSOC: /* infra mode */
KASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates,
("%s: bogus xmit rate %u setup\n", __func__,
ni->ni_txrate));
#ifdef IEEE80211_DEBUG
if (ieee80211_msg_debug(vap)) {
ieee80211_note(vap, "%s with " MAC_FMT " ssid ",
(vap->iv_opmode == IEEE80211_M_STA ?
"associated" : "synchronized "),
MAC_ADDR(vap->iv_bssid));
ieee80211_print_essid(vap->iv_bss->ni_essid,
ni->ni_esslen);
printk(" channel %d start %uMb\n",
ieee80211_chan2ieee(ic, ic->ic_curchan),
IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
}
#endif
if (vap->iv_opmode == IEEE80211_M_STA) {
ieee80211_scan_assoc_success(ic,
ni->ni_macaddr);
ieee80211_notify_node_join(ni,
(arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP) | \
(arg == IEEE80211_FC0_SUBTYPE_REASSOC_RESP));
}
break;
}
/* WDS/Repeater: Start software beacon timer for STA */
if (ostate != IEEE80211_S_RUN &&
(vap->iv_opmode == IEEE80211_M_STA &&
vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) {
vap->iv_swbmiss.function = ieee80211_sta_swbmiss;
vap->iv_swbmiss.data = (unsigned long) vap;
vap->iv_swbmiss_period = IEEE80211_TU_TO_JIFFIES(
vap->iv_ic->ic_bmissthreshold * ni->ni_intval);
mod_timer(&vap->iv_swbmiss, jiffies + vap->iv_swbmiss_period);
}
/*
* Start/stop the authenticator when operating as an
* AP. We delay until here to allow configuration to
* happen out of order.
*/
/* XXX WDS? */
if (vap->iv_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */
vap->iv_auth->ia_attach != NULL) {
/* XXX check failure */
vap->iv_auth->ia_attach(vap);
} else if (vap->iv_auth->ia_detach != NULL)
vap->iv_auth->ia_detach(vap);
/*
* When 802.1x is not in use mark the port authorized
* at this point so traffic can flow.
*/
if (ni->ni_authmode != IEEE80211_AUTH_8021X)
ieee80211_node_authorize(ni);
#ifdef ATH_SUPERG_XR
/*
* fire a timer to bring up XR vap if configured.
*/
if (ostate != IEEE80211_S_RUN &&
vap->iv_xrvap &&
!(vap->iv_flags & IEEE80211_F_XR)) {
vap->iv_xrvapstart.function = ieee80211_start_xrvap;
vap->iv_xrvapstart.data = (unsigned long) vap->iv_xrvap;
mod_timer(&vap->iv_xrvapstart, jiffies + HZ); /* start xr vap on next second */
/*
* do not let the normal vap automatically bring up XR vap.
* let the timer handler start the XR vap. if you let the
* normal vap automatically start the XR vap normal vap will not
* have the bssid initialized and the XR vap will use the
* invalid bssid in XRIE of its beacon.
*/
if (vap->iv_xrvap->iv_flags_ext & IEEE80211_FEXT_SCAN_PENDING)
vap->iv_xrvap->iv_flags_ext &= ~IEEE80211_FEXT_SCAN_PENDING;
}
/*
* when an XR vap transitions to RUN state,
* normal vap needs to update the XR IE
* with the xr vaps MAC address.
*/
if (vap->iv_flags & IEEE80211_F_XR)
vap->iv_xrvap->iv_flags |= IEEE80211_F_XRUPDATE;
#endif
break;
}
return 0;
}
/* Get the dominant state of the device (init, running, or scanning
* (and/or associating)) */
static int get_dominant_state(struct ieee80211com *ic) {
int nscanning = 0;
int nrunning = 0;
struct ieee80211vap *tmpvap;
TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
if (tmpvap->iv_opmode == IEEE80211_M_MONITOR)
/* skip monitor vaps as their
* S_RUN shouldn't have any
* influence on modifying state
* transition */
continue;
if (tmpvap->iv_state == IEEE80211_S_RUN)
nrunning++;
else if (tmpvap->iv_state == IEEE80211_S_SCAN ||
tmpvap->iv_state == IEEE80211_S_AUTH ||
tmpvap->iv_state == IEEE80211_S_ASSOC) {
KASSERT((nscanning <= 1), ("Two VAPs cannot scan at "
"the same time\n"));
nscanning++;
}
}
KASSERT(!(nscanning && nrunning), ("SCAN and RUN can't happen at the "
"same time\n"));
KASSERT((nscanning <= 1), ("Two VAPs must not SCAN at the "
"same time\n"));
if (nrunning > 0)
return IEEE80211_S_RUN;
else if (nscanning > 0)
return IEEE80211_S_SCAN;
else
return IEEE80211_S_INIT;
}
static void
dump_vap_states(struct ieee80211com *ic, struct ieee80211vap* highlighed)
{
/* RE-count the number of VAPs in RUN, SCAN states */
int nrunning = 0;
int nscanning = 0;
struct ieee80211vap *tmpvap;
TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
IEEE80211_DPRINTF(tmpvap, IEEE80211_MSG_STATE,
"%s: VAP %s%p[%24s]%s = %s%s%s.\n", __func__,
(highlighed == tmpvap ? "*" : " "),
tmpvap, tmpvap->iv_nickname,
(highlighed == tmpvap ? "*" : " "),
ieee80211_state_name[tmpvap->iv_state],
(tmpvap->iv_state == IEEE80211_S_RUN) ?
"[RUNNING]" : "",
(tmpvap->iv_state == IEEE80211_S_SCAN ||
tmpvap->iv_state == IEEE80211_S_AUTH ||
tmpvap->iv_state == IEEE80211_S_ASSOC) ?
"[SCANNING]" : ""
);
/* Ignore monitors they are passive */
if (tmpvap->iv_opmode == IEEE80211_M_MONITOR) {
continue;
}
if (tmpvap->iv_state == IEEE80211_S_RUN) {
KASSERT((nscanning == 0), ("SCAN and RUN can't happen "
"at the same time\n"));
nrunning++;
}
if (tmpvap->iv_state == IEEE80211_S_SCAN ||
/* STA in WDS/Repeater */
tmpvap->iv_state == IEEE80211_S_AUTH ||
tmpvap->iv_state == IEEE80211_S_ASSOC) {
KASSERT((nscanning == 0), ("Two VAPs cannot scan at "
"the same time\n"));
KASSERT((nrunning == 0), ("SCAN and RUN can't happen "
"at the same time\n"));
nscanning++;
}
}
}
static int
ieee80211_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
struct ieee80211com *ic = vap->iv_ic;
enum ieee80211_state ostate;
enum ieee80211_state dstate;
int blocked = 0;
struct ieee80211vap *tmpvap;
ostate = vap->iv_state;
dstate = get_dominant_state(ic);
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
"%s: %p[%s] %s -> %s (dominant %s)\n",
__func__, vap, vap->iv_nickname,
ieee80211_state_name[ostate],
ieee80211_state_name[nstate],
ieee80211_state_name[dstate]);
switch (nstate) {
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
case IEEE80211_S_SCAN:
switch (dstate) {
case IEEE80211_S_RUN:
if(vap->iv_opmode == IEEE80211_M_MONITOR ||
vap->iv_opmode == IEEE80211_M_WDS ||
vap->iv_opmode == IEEE80211_M_HOSTAP) {
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
"%s: Jumping directly to RUN "
"on VAP %p [%s].\n",
__func__, vap,
vap->iv_nickname);
/* One or more VAPs are running, so
* non-station VAPs can skip SCAN/AUTH/ASSOC
* states and just run. */
__ieee80211_newstate(vap, IEEE80211_S_RUN, arg);
} else {
/* We'll use this flag briefly to mark
* transition in progress */
ic->ic_flags_ext |= IEEE80211_FEXT_SCAN_PENDING;
/* IEEE80211_M_IBSS or IEEE80211_M_STA VAP
* is forced to scan, we need to change
* all other VAPs state to S_INIT and pend for
* the scan completion */
TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
if ((vap != tmpvap) &&
(tmpvap->iv_opmode !=
IEEE80211_M_MONITOR)) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE,
"%s: Setting "
"SCAN_PENDING "
"flag on "
"VAP %p "
"[%s].\n",
__func__,
tmpvap,
tmpvap->
iv_nickname);
tmpvap->iv_flags_ext |=
IEEE80211_FEXT_SCAN_PENDING;
if (tmpvap->iv_state !=
IEEE80211_S_INIT) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE,
"%s: "
"Forcing "
"INIT "
"state "
"on "
"VAP "
"%p "
"[%s].\n",
__func__,
tmpvap,
tmpvap->
iv_nickname);
tmpvap->iv_newstate(tmpvap,
IEEE80211_S_INIT,
0);
} else {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE,
"%s: "
"NOT "
"forcing "
"INIT "
"state "
"on "
"VAP "
"%p "
"[%s].\n",
__func__,
tmpvap,
tmpvap->
iv_nickname);
}
}
}
/* We used this flag briefly to mark transition in progress */
ic->ic_flags_ext &= ~IEEE80211_FEXT_SCAN_PENDING;
/* Transition S_INIT -> S_SCAN */
__ieee80211_newstate(vap, nstate, arg);
break;
}
break;
case IEEE80211_S_SCAN:
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
/* this VAP was scanning */
/* STA in WDS/Repeater needs to bring up other VAPs */
if (ostate == IEEE80211_S_SCAN ||
ostate == IEEE80211_S_AUTH ||
ostate == IEEE80211_S_ASSOC) {
/* Transition (S_SCAN|S_AUTH|S_ASSOC) ->
* S_SCAN */
__ieee80211_newstate(vap, nstate, arg);
} else {
/* Someone else is scanning, so block the
* transition */
vap->iv_flags_ext |=
IEEE80211_FEXT_SCAN_PENDING;
__ieee80211_newstate(vap, IEEE80211_S_INIT,
arg);
blocked = 1;
}
break;
case IEEE80211_S_INIT:
/* Transition S_INIT -> S_SCAN */
__ieee80211_newstate(vap, nstate, arg);
break;
}
break;
case IEEE80211_S_RUN:
/* this VAP was scanning */
/* STA in WDS/Repeater needs to bring up other VAPs */
if (ostate == IEEE80211_S_SCAN ||
ostate == IEEE80211_S_AUTH ||
ostate == IEEE80211_S_ASSOC) {
/* Transition (S_SCAN|S_AUTH|S_ASSOC) -> S_RUN */
__ieee80211_newstate(vap, nstate, arg);
/* Then bring up all other vaps pending on the scan */
dstate = get_dominant_state(ic);
if (dstate == IEEE80211_S_RUN) {
TAILQ_FOREACH(tmpvap, &ic->ic_vaps, iv_next) {
if ((vap != tmpvap) &&
(tmpvap->iv_opmode !=
IEEE80211_M_MONITOR) &&
(tmpvap->iv_flags_ext &
IEEE80211_FEXT_SCAN_PENDING)) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_STATE,
"%s: Clearing "
"SCAN_PENDING "
"flag from VAP "
"%p [%s] and "
"transitioning "
"to RUN state.\n",
__func__, tmpvap,
tmpvap->iv_nickname);
tmpvap->iv_flags_ext &=
~IEEE80211_FEXT_SCAN_PENDING;
if(tmpvap->iv_state !=
IEEE80211_S_RUN) {
tmpvap->iv_newstate(tmpvap,
IEEE80211_S_RUN, 0);
} else if(tmpvap->iv_opmode ==
IEEE80211_M_HOSTAP) {
/* Force other AP through
* -> INIT -> RUN to make
* sure beacons are
* reallocated */
tmpvap->iv_newstate(tmpvap,
IEEE80211_S_INIT, 0);
tmpvap->iv_newstate(tmpvap,
IEEE80211_S_RUN, 0);
}
}
}
}
} else if (dstate == IEEE80211_S_SCAN) {
/* Force to scan pending... someone is scanning */
vap->iv_flags_ext |= IEEE80211_FEXT_SCAN_PENDING;
__ieee80211_newstate(vap, IEEE80211_S_INIT, arg);
blocked = 1;
} else {
__ieee80211_newstate(vap, nstate, arg);
}
break;
default:
__ieee80211_newstate(vap, nstate, arg);
}
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
"%s: %s requested transition %s -> %s on VAP %p [%s]. "
"Dominant state is %s.\n",
__func__,
(blocked ? "BLOCKED" : "ALLOWED"),
ieee80211_state_name[ostate],
ieee80211_state_name[nstate],
vap,
vap->iv_nickname,
ieee80211_state_name[dstate]);
dump_vap_states(ic, vap);
return 0;
}
#ifdef ATH_SUPERG_XR
/*
* start the XR vap .
* called from a timer when normal vap enters RUN state .
*/
static void
ieee80211_start_xrvap(unsigned long data)
{
struct ieee80211vap *vap = (struct ieee80211vap *)data;
/* make sure that the normal vap is still in RUN state */
if (vap->iv_xrvap->iv_state == IEEE80211_S_RUN)
ieee80211_init(vap->iv_dev, 0);
}
#endif
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