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freebsd/sys/net80211/ieee80211_proto.c
Sam Leffler ad26242724 fix switching between agressive and non-agressive wmm modes 
Obtained from:	atheros
MFC after:	3 days
2006-03-10 06:18:03 +00:00

1153 lines
33 KiB
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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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* IEEE 802.11 protocol support.
*/
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/ethernet.h> /* XXX for ether_sprintf */
#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"
};
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"
};
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 */
};
const char *ieee80211_wme_acnames[] = {
"WME_AC_BE",
"WME_AC_BK",
"WME_AC_VI",
"WME_AC_VO",
"WME_UPSD",
};
static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
void
ieee80211_proto_attach(struct ieee80211com *ic)
{
struct ifnet *ifp = ic->ic_ifp;
/* XXX room for crypto */
ifp->if_hdrlen = sizeof(struct ieee80211_qosframe_addr4);
ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
ic->ic_fragthreshold = IEEE80211_FRAG_DEFAULT;
ic->ic_fixed_rate = IEEE80211_FIXED_RATE_NONE;
ic->ic_bmiss_max = IEEE80211_BMISS_MAX;
callout_init(&ic->ic_swbmiss, CALLOUT_MPSAFE);
ic->ic_mcast_rate = IEEE80211_MCAST_RATE_DEFAULT;
ic->ic_protmode = IEEE80211_PROT_CTSONLY;
ic->ic_roaming = IEEE80211_ROAMING_AUTO;
ic->ic_wme.wme_hipri_switch_hysteresis =
AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
mtx_init(&ic->ic_mgtq.ifq_mtx, ifp->if_xname, "mgmt send q", MTX_DEF);
/* protocol state change handler */
ic->ic_newstate = ieee80211_newstate;
/* initialize management frame handlers */
ic->ic_recv_mgmt = ieee80211_recv_mgmt;
ic->ic_send_mgmt = ieee80211_send_mgmt;
}
void
ieee80211_proto_detach(struct ieee80211com *ic)
{
/*
* 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 (ic->ic_auth->ia_detach)
ic->ic_auth->ia_detach(ic);
IF_DRAIN(&ic->ic_mgtq);
mtx_destroy(&ic->ic_mgtq.ifq_mtx);
/*
* Detach any ACL'ator.
*/
if (ic->ic_acl != NULL)
ic->ic_acl->iac_detach(ic);
}
/*
* 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.
*/
static 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);
}
SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
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;
}
void
ieee80211_authenticator_unregister(int type)
{
if (type >= IEEE80211_AUTH_MAX)
return;
authenticators[type] = NULL;
}
/*
* 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)
{
printf("wlan: %s acl policy registered\n", iac->iac_name);
acl = iac;
}
void
ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
{
if (acl == iac)
acl = NULL;
printf("wlan: %s acl policy unregistered\n", iac->iac_name);
}
const struct ieee80211_aclator *
ieee80211_aclator_get(const char *name)
{
if (acl == NULL)
ieee80211_load_module("wlan_acl");
return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
}
void
ieee80211_print_essid(const u_int8_t *essid, int len)
{
const u_int8_t *p;
int i;
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) {
printf("\"");
for (i = 0, p = essid; i < len; i++, p++)
printf("%c", *p);
printf("\"");
} else {
printf("0x");
for (i = 0, p = essid; i < len; i++, p++)
printf("%02x", *p);
}
}
void
ieee80211_dump_pkt(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:
printf("NODS %s", ether_sprintf(wh->i_addr2));
printf("->%s", ether_sprintf(wh->i_addr1));
printf("(%s)", ether_sprintf(wh->i_addr3));
break;
case IEEE80211_FC1_DIR_TODS:
printf("TODS %s", ether_sprintf(wh->i_addr2));
printf("->%s", ether_sprintf(wh->i_addr3));
printf("(%s)", ether_sprintf(wh->i_addr1));
break;
case IEEE80211_FC1_DIR_FROMDS:
printf("FRDS %s", ether_sprintf(wh->i_addr3));
printf("->%s", ether_sprintf(wh->i_addr1));
printf("(%s)", ether_sprintf(wh->i_addr2));
break;
case IEEE80211_FC1_DIR_DSTODS:
printf("DSDS %s", ether_sprintf((const u_int8_t *)&wh[1]));
printf("->%s", ether_sprintf(wh->i_addr3));
printf("(%s", ether_sprintf(wh->i_addr2));
printf("->%s)", ether_sprintf(wh->i_addr1));
break;
}
switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
case IEEE80211_FC0_TYPE_DATA:
printf(" data");
break;
case IEEE80211_FC0_TYPE_MGT:
printf(" %s", ieee80211_mgt_subtype_name[
(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
>> IEEE80211_FC0_SUBTYPE_SHIFT]);
break;
default:
printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
break;
}
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
int i;
printf(" WEP [IV");
for (i = 0; i < IEEE80211_WEP_IVLEN; i++)
printf(" %.02x", buf[sizeof(*wh)+i]);
printf(" KID %u]", buf[sizeof(*wh)+i] >> 6);
}
if (rate >= 0)
printf(" %dM", rate / 2);
if (rssi >= 0)
printf(" +%d", rssi);
printf("\n");
if (len > 0) {
for (i = 0; i < len; i++) {
if ((i & 1) == 0)
printf(" ");
printf("%02x", buf[i]);
}
printf("\n");
}
}
int
ieee80211_fix_rate(struct ieee80211_node *ni, int flags)
{
#define RV(v) ((v) & IEEE80211_RATE_VAL)
struct ieee80211com *ic = ni->ni_ic;
int i, j, ignore, error;
int okrate, badrate, fixedrate;
struct ieee80211_rateset *srs, *nrs;
u_int8_t r;
/*
* If the fixed rate check was requested but no
* fixed has been defined then just remove it.
*/
if ((flags & IEEE80211_F_DOFRATE) &&
ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE)
flags &= ~IEEE80211_F_DOFRATE;
error = 0;
okrate = badrate = fixedrate = 0;
srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
nrs = &ni->ni_rates;
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;
if (flags & IEEE80211_F_DOFRATE) {
/*
* Check any fixed rate is included.
*/
if (r == RV(srs->rs_rates[ic->ic_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 insures 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 (ic->ic_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 == 0))
return badrate | IEEE80211_RATE_BASIC;
else
return RV(okrate);
#undef RV
}
/*
* Reset 11g-related state.
*/
void
ieee80211_reset_erp(struct ieee80211com *ic)
{
ic->ic_flags &= ~IEEE80211_F_USEPROT;
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,
ic->ic_curmode == IEEE80211_MODE_11A ||
(ic->ic_curmode == IEEE80211_MODE_11G &&
ic->ic_opmode == IEEE80211_M_HOSTAP &&
(ic->ic_caps & IEEE80211_C_SHSLOT)));
/*
* Set short preamble and ERP barker-preamble flags.
*/
if (ic->ic_curmode == IEEE80211_MODE_11A ||
(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;
}
}
/*
* 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_ifp);
}
/*
* 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)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
int i, j;
if (rs->rs_nrates < N(rates))
return 0;
for (i = 0; i < N(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;
#undef N
}
/*
* Mark the basic rates for the 11g rate table based on the
* operating mode. For real 11g we mark all the 11b rates
* and 6, 12, and 24 OFDM. For 11b compatibility we mark only
* 11b rates. There's also a pseudo 11a-mode used to mark only
* the basic OFDM rates.
*/
void
ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
{
static const struct ieee80211_rateset basic[] = {
{ 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 */
/* IEEE80211_MODE_PUREG (not yet) */
{ 7, { 2, 4, 11, 22, 12, 24, 48 } },
};
int i, j;
for (i = 0; i < rs->rs_nrates; i++) {
rs->rs_rates[i] &= IEEE80211_RATE_VAL;
for (j = 0; j < basic[mode].rs_nrates; j++)
if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
break;
}
}
}
/*
* WME protocol support. The following parameters come from the spec.
*/
typedef struct phyParamType {
u_int8_t aifsn;
u_int8_t logcwmin;
u_int8_t logcwmax;
u_int16_t txopLimit;
u_int8_t acm;
} paramType;
static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
{ 3, 4, 6 }, /* IEEE80211_MODE_AUTO */
{ 3, 4, 6 }, /* IEEE80211_MODE_11A */
{ 3, 5, 7 }, /* IEEE80211_MODE_11B */
{ 3, 4, 6 }, /* IEEE80211_MODE_11G */
{ 3, 5, 7 }, /* IEEE80211_MODE_FH */
{ 2, 3, 5 }, /* IEEE80211_MODE_TURBO_A */
{ 2, 3, 5 }, /* IEEE80211_MODE_TURBO_G */
};
static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
{ 7, 4, 10 }, /* IEEE80211_MODE_AUTO */
{ 7, 4, 10 }, /* IEEE80211_MODE_11A */
{ 7, 5, 10 }, /* IEEE80211_MODE_11B */
{ 7, 4, 10 }, /* IEEE80211_MODE_11G */
{ 7, 5, 10 }, /* IEEE80211_MODE_FH */
{ 7, 3, 10 }, /* IEEE80211_MODE_TURBO_A */
{ 7, 3, 10 }, /* IEEE80211_MODE_TURBO_G */
};
static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
{ 1, 3, 4, 94 }, /* IEEE80211_MODE_AUTO */
{ 1, 3, 4, 94 }, /* IEEE80211_MODE_11A */
{ 1, 4, 5, 188 }, /* IEEE80211_MODE_11B */
{ 1, 3, 4, 94 }, /* IEEE80211_MODE_11G */
{ 1, 4, 5, 188 }, /* IEEE80211_MODE_FH */
{ 1, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_A */
{ 1, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_G */
};
static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
{ 1, 2, 3, 47 }, /* IEEE80211_MODE_AUTO */
{ 1, 2, 3, 47 }, /* IEEE80211_MODE_11A */
{ 1, 3, 4, 102 }, /* IEEE80211_MODE_11B */
{ 1, 2, 3, 47 }, /* IEEE80211_MODE_11G */
{ 1, 3, 4, 102 }, /* IEEE80211_MODE_FH */
{ 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_A */
{ 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_G */
};
static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
{ 3, 4, 10 }, /* IEEE80211_MODE_AUTO */
{ 3, 4, 10 }, /* IEEE80211_MODE_11A */
{ 3, 5, 10 }, /* IEEE80211_MODE_11B */
{ 3, 4, 10 }, /* IEEE80211_MODE_11G */
{ 3, 5, 10 }, /* IEEE80211_MODE_FH */
{ 2, 3, 10 }, /* IEEE80211_MODE_TURBO_A */
{ 2, 3, 10 }, /* IEEE80211_MODE_TURBO_G */
};
static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
{ 2, 3, 4, 94 }, /* IEEE80211_MODE_AUTO */
{ 2, 3, 4, 94 }, /* IEEE80211_MODE_11A */
{ 2, 4, 5, 188 }, /* IEEE80211_MODE_11B */
{ 2, 3, 4, 94 }, /* IEEE80211_MODE_11G */
{ 2, 4, 5, 188 }, /* IEEE80211_MODE_FH */
{ 2, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_A */
{ 2, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_G */
};
static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
{ 2, 2, 3, 47 }, /* IEEE80211_MODE_AUTO */
{ 2, 2, 3, 47 }, /* IEEE80211_MODE_11A */
{ 2, 3, 4, 102 }, /* IEEE80211_MODE_11B */
{ 2, 2, 3, 47 }, /* IEEE80211_MODE_11G */
{ 2, 3, 4, 102 }, /* IEEE80211_MODE_FH */
{ 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_A */
{ 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_G */
};
void
ieee80211_wme_initparams(struct ieee80211com *ic)
{
struct ieee80211_wme_state *wme = &ic->ic_wme;
const paramType *pPhyParam, *pBssPhyParam;
struct wmeParams *wmep;
int i;
if ((ic->ic_caps & IEEE80211_C_WME) == 0)
return;
for (i = 0; i < WME_NUM_AC; i++) {
switch (i) {
case WME_AC_BK:
pPhyParam = &phyParamForAC_BK[ic->ic_curmode];
pBssPhyParam = &phyParamForAC_BK[ic->ic_curmode];
break;
case WME_AC_VI:
pPhyParam = &phyParamForAC_VI[ic->ic_curmode];
pBssPhyParam = &bssPhyParamForAC_VI[ic->ic_curmode];
break;
case WME_AC_VO:
pPhyParam = &phyParamForAC_VO[ic->ic_curmode];
pBssPhyParam = &bssPhyParamForAC_VO[ic->ic_curmode];
break;
case WME_AC_BE:
default:
pPhyParam = &phyParamForAC_BE[ic->ic_curmode];
pBssPhyParam = &bssPhyParamForAC_BE[ic->ic_curmode];
break;
}
wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
wmep->wmep_acm = pPhyParam->acm;
wmep->wmep_aifsn = pPhyParam->aifsn;
wmep->wmep_logcwmin = pPhyParam->logcwmin;
wmep->wmep_logcwmax = pPhyParam->logcwmax;
wmep->wmep_txopLimit = pPhyParam->txopLimit;
} else {
wmep->wmep_acm = pBssPhyParam->acm;
wmep->wmep_aifsn = pBssPhyParam->aifsn;
wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
}
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
"%s: %s chan [acm %u aifsn %u log2(cwmin) %u "
"log2(cwmax) %u txpoLimit %u]\n", __func__
, ieee80211_wme_acnames[i]
, wmep->wmep_acm
, wmep->wmep_aifsn
, wmep->wmep_logcwmin
, wmep->wmep_logcwmax
, wmep->wmep_txopLimit
);
wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
wmep->wmep_acm = pBssPhyParam->acm;
wmep->wmep_aifsn = pBssPhyParam->aifsn;
wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
"%s: %s bss [acm %u aifsn %u log2(cwmin) %u "
"log2(cwmax) %u txpoLimit %u]\n", __func__
, ieee80211_wme_acnames[i]
, wmep->wmep_acm
, wmep->wmep_aifsn
, wmep->wmep_logcwmin
, wmep->wmep_logcwmax
, wmep->wmep_txopLimit
);
}
/* NB: check ic_bss to avoid NULL deref on initial attach */
if (ic->ic_bss != NULL) {
/*
* Calculate agressive mode switching threshold based
* on beacon interval. This doesn't need locking since
* we're only called before entering the RUN state at
* which point we start sending beacon frames.
*/
wme->wme_hipri_switch_thresh =
(HIGH_PRI_SWITCH_THRESH * ic->ic_bss->ni_intval) / 100;
ieee80211_wme_updateparams(ic);
}
}
/*
* Update WME parameters for ourself and the BSS.
*/
void
ieee80211_wme_updateparams_locked(struct ieee80211com *ic)
{
static const paramType phyParam[IEEE80211_MODE_MAX] = {
{ 2, 4, 10, 64 }, /* IEEE80211_MODE_AUTO */
{ 2, 4, 10, 64 }, /* IEEE80211_MODE_11A */
{ 2, 5, 10, 64 }, /* IEEE80211_MODE_11B */
{ 2, 4, 10, 64 }, /* IEEE80211_MODE_11G */
{ 2, 5, 10, 64 }, /* IEEE80211_MODE_FH */
{ 1, 3, 10, 64 }, /* IEEE80211_MODE_TURBO_A */
{ 1, 3, 10, 64 }, /* IEEE80211_MODE_TURBO_G */
};
struct ieee80211_wme_state *wme = &ic->ic_wme;
const struct wmeParams *wmep;
struct wmeParams *chanp, *bssp;
int i;
/* set up the channel access parameters for the physical device */
for (i = 0; i < WME_NUM_AC; i++) {
chanp = &wme->wme_chanParams.cap_wmeParams[i];
wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
chanp->wmep_aifsn = wmep->wmep_aifsn;
chanp->wmep_logcwmin = wmep->wmep_logcwmin;
chanp->wmep_logcwmax = wmep->wmep_logcwmax;
chanp->wmep_txopLimit = wmep->wmep_txopLimit;
chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
chanp->wmep_aifsn = wmep->wmep_aifsn;
chanp->wmep_logcwmin = wmep->wmep_logcwmin;
chanp->wmep_logcwmax = wmep->wmep_logcwmax;
chanp->wmep_txopLimit = wmep->wmep_txopLimit;
}
/*
* This implements agressive mode as found in certain
* vendors' AP's. When there is significant high
* priority (VI/VO) traffic in the BSS throttle back BE
* traffic by using conservative parameters. Otherwise
* BE uses agressive params to optimize performance of
* legacy/non-QoS traffic.
*/
if ((ic->ic_opmode == IEEE80211_M_HOSTAP &&
(wme->wme_flags & WME_F_AGGRMODE) != 0) ||
(ic->ic_opmode == IEEE80211_M_STA &&
(ic->ic_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
(ic->ic_flags & IEEE80211_F_WME) == 0) {
chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
chanp->wmep_aifsn = bssp->wmep_aifsn =
phyParam[ic->ic_curmode].aifsn;
chanp->wmep_logcwmin = bssp->wmep_logcwmin =
phyParam[ic->ic_curmode].logcwmin;
chanp->wmep_logcwmax = bssp->wmep_logcwmax =
phyParam[ic->ic_curmode].logcwmax;
chanp->wmep_txopLimit = bssp->wmep_txopLimit =
(ic->ic_flags & IEEE80211_F_BURST) ?
phyParam[ic->ic_curmode].txopLimit : 0;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
"%s: %s [acm %u aifsn %u log2(cwmin) %u "
"log2(cwmax) %u txpoLimit %u]\n", __func__
, ieee80211_wme_acnames[WME_AC_BE]
, chanp->wmep_acm
, chanp->wmep_aifsn
, chanp->wmep_logcwmin
, chanp->wmep_logcwmax
, chanp->wmep_txopLimit
);
}
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] = {
3, /* IEEE80211_MODE_AUTO */
3, /* IEEE80211_MODE_11A */
4, /* IEEE80211_MODE_11B */
3, /* IEEE80211_MODE_11G */
4, /* IEEE80211_MODE_FH */
3, /* IEEE80211_MODE_TURBO_A */
3, /* IEEE80211_MODE_TURBO_G */
};
chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
chanp->wmep_logcwmin = bssp->wmep_logcwmin =
logCwMin[ic->ic_curmode];
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
"%s: %s log2(cwmin) %u\n", __func__
, ieee80211_wme_acnames[WME_AC_BE]
, chanp->wmep_logcwmin
);
}
if (ic->ic_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 =
(wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
ic->ic_flags |= IEEE80211_F_WMEUPDATE;
}
wme->wme_update(ic);
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
"%s: WME params updated, cap_info 0x%x\n", __func__,
ic->ic_opmode == IEEE80211_M_STA ?
wme->wme_wmeChanParams.cap_info :
wme->wme_bssChanParams.cap_info);
}
void
ieee80211_wme_updateparams(struct ieee80211com *ic)
{
if (ic->ic_caps & IEEE80211_C_WME) {
IEEE80211_BEACON_LOCK(ic);
ieee80211_wme_updateparams_locked(ic);
IEEE80211_BEACON_UNLOCK(ic);
}
}
void
ieee80211_beacon_miss(struct ieee80211com *ic)
{
if (ic->ic_flags & IEEE80211_F_SCAN) {
/* XXX check ic_curchan != ic_bsschan? */
return;
}
IEEE80211_DPRINTF(ic,
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 (ic->ic_opmode != IEEE80211_M_STA || ic->ic_state != IEEE80211_S_RUN)
return;
if (++ic->ic_bmiss_count < ic->ic_bmiss_max) {
/*
* Send a directed probe req before falling back to a scan;
* if we receive a response ic_bmiss_count will be reset.
* Some cards mistakenly report beacon miss so this avoids
* the expensive scan if the ap is still there.
*/
ieee80211_send_probereq(ic->ic_bss, ic->ic_myaddr,
ic->ic_bss->ni_bssid, ic->ic_bss->ni_bssid,
ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen,
ic->ic_opt_ie, ic->ic_opt_ie_len);
return;
}
ic->ic_bmiss_count = 0;
ieee80211_new_state(ic, IEEE80211_S_SCAN, 0);
}
/*
* Software beacon miss handling. Check if any beacons
* were received in the last period. If not post a
* beacon miss; otherwise reset the counter.
*/
static void
ieee80211_swbmiss(void *arg)
{
struct ieee80211com *ic = arg;
if (ic->ic_swbmiss_count == 0) {
ieee80211_beacon_miss(ic);
if (ic->ic_bmiss_count == 0) /* don't re-arm timer */
return;
} else
ic->ic_swbmiss_count = 0;
callout_reset(&ic->ic_swbmiss, ic->ic_swbmiss_period,
ieee80211_swbmiss, ic);
}
static void
sta_disassoc(void *arg, struct ieee80211_node *ni)
{
struct ieee80211com *ic = arg;
if (ni->ni_associd != 0) {
IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
ieee80211_node_leave(ic, ni);
}
}
static void
sta_deauth(void *arg, struct ieee80211_node *ni)
{
struct ieee80211com *ic = arg;
IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_ASSOC_LEAVE);
}
static int
ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
{
struct ifnet *ifp = ic->ic_ifp;
struct ieee80211_node *ni;
enum ieee80211_state ostate;
ostate = ic->ic_state;
IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
ic->ic_state = nstate; /* state transition */
ni = ic->ic_bss; /* NB: no reference held */
if (ic->ic_flags_ext & IEEE80211_FEXT_SWBMISS)
callout_stop(&ic->ic_swbmiss);
switch (nstate) {
case IEEE80211_S_INIT:
switch (ostate) {
case IEEE80211_S_INIT:
break;
case IEEE80211_S_RUN:
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
ieee80211_sta_leave(ic, ni);
break;
case IEEE80211_M_HOSTAP:
ieee80211_iterate_nodes(&ic->ic_sta,
sta_disassoc, ic);
break;
default:
break;
}
goto reset;
case IEEE80211_S_ASSOC:
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_AUTH_LEAVE);
break;
case IEEE80211_M_HOSTAP:
ieee80211_iterate_nodes(&ic->ic_sta,
sta_deauth, ic);
break;
default:
break;
}
goto reset;
case IEEE80211_S_SCAN:
ieee80211_cancel_scan(ic);
goto reset;
case IEEE80211_S_AUTH:
reset:
ic->ic_mgt_timer = 0;
IF_DRAIN(&ic->ic_mgtq);
ieee80211_reset_bss(ic);
break;
}
if (ic->ic_auth->ia_detach != NULL)
ic->ic_auth->ia_detach(ic);
break;
case IEEE80211_S_SCAN:
switch (ostate) {
case IEEE80211_S_INIT:
if ((ic->ic_opmode == IEEE80211_M_HOSTAP ||
ic->ic_opmode == IEEE80211_M_IBSS ||
ic->ic_opmode == IEEE80211_M_AHDEMO) &&
ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
/*
* AP operation and we already have a channel;
* bypass the scan and startup immediately.
*/
ieee80211_create_ibss(ic, ic->ic_des_chan);
} else {
ieee80211_begin_scan(ic, arg);
}
break;
case IEEE80211_S_SCAN:
/*
* Scan next. If doing an active scan probe
* for the requested ap (if any).
*/
if (ic->ic_flags & IEEE80211_F_ASCAN)
ieee80211_probe_curchan(ic, 0);
break;
case IEEE80211_S_RUN:
/* beacon miss */
IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE,
"no recent beacons from %s; rescanning\n",
ether_sprintf(ic->ic_bss->ni_bssid));
ieee80211_sta_leave(ic, ni);
ic->ic_flags &= ~IEEE80211_F_SIBSS; /* XXX */
/* FALLTHRU */
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
/* timeout restart scan */
ni = ieee80211_find_node(&ic->ic_scan,
ic->ic_bss->ni_macaddr);
if (ni != NULL) {
ni->ni_fails++;
ieee80211_unref_node(&ni);
}
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
ieee80211_begin_scan(ic, arg);
break;
}
break;
case IEEE80211_S_AUTH:
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
IEEE80211_SEND_MGMT(ic, 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(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 2);
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
/* ignore and retry scan on timeout */
break;
}
break;
case IEEE80211_S_RUN:
switch (arg) {
case IEEE80211_FC0_SUBTYPE_AUTH:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 2);
ic->ic_state = ostate; /* stay RUN */
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
ieee80211_sta_leave(ic, ni);
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
/* try to reauth */
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 1);
}
break;
}
break;
}
break;
case IEEE80211_S_ASSOC:
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
case IEEE80211_S_ASSOC:
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
"%s: invalid transition\n", __func__);
break;
case IEEE80211_S_AUTH:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
break;
case IEEE80211_S_RUN:
ieee80211_sta_leave(ic, ni);
if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
}
break;
}
break;
case IEEE80211_S_RUN:
if (ic->ic_flags & IEEE80211_F_WPA) {
/* XXX validate prerequisites */
}
switch (ostate) {
case IEEE80211_S_INIT:
if (ic->ic_opmode == IEEE80211_M_MONITOR)
break;
/* fall thru... */
case IEEE80211_S_AUTH:
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
"%s: invalid transition\n", __func__);
/* fall thru... */
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(ic)) {
if (ic->ic_opmode == IEEE80211_M_STA)
if_printf(ifp, "associated ");
else
if_printf(ifp, "synchronized ");
printf("with %s ssid ",
ether_sprintf(ni->ni_bssid));
ieee80211_print_essid(ic->ic_bss->ni_essid,
ni->ni_esslen);
printf(" channel %d start %uMb\n",
ieee80211_chan2ieee(ic, ic->ic_curchan),
IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
}
#endif
ic->ic_mgt_timer = 0;
if (ic->ic_opmode == IEEE80211_M_STA)
ieee80211_notify_node_join(ic, ni,
arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
if_start(ifp); /* XXX not authorized yet */
break;
}
if (ostate != IEEE80211_S_RUN &&
ic->ic_opmode == IEEE80211_M_STA &&
(ic->ic_flags_ext & IEEE80211_FEXT_SWBMISS)) {
/*
* Start s/w beacon miss timer for devices w/o
* hardware support. We fudge a bit here since
* we're doing this in software.
*/
ic->ic_swbmiss_period = IEEE80211_TU_TO_TICKS(
2 * ic->ic_bmissthreshold * ni->ni_intval);
ic->ic_swbmiss_count = 0;
callout_reset(&ic->ic_swbmiss, ic->ic_swbmiss_period,
ieee80211_swbmiss, ic);
}
/*
* Start/stop the authenticator when operating as an
* AP. We delay until here to allow configuration to
* happen out of order.
*/
if (ic->ic_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */
ic->ic_auth->ia_attach != NULL) {
/* XXX check failure */
ic->ic_auth->ia_attach(ic);
} else if (ic->ic_auth->ia_detach != NULL) {
ic->ic_auth->ia_detach(ic);
}
/*
* 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);
/*
* Enable inactivity processing.
* XXX
*/
ic->ic_scan.nt_inact_timer = IEEE80211_INACT_WAIT;
ic->ic_sta.nt_inact_timer = IEEE80211_INACT_WAIT;
break;
}
return 0;
}
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