ieee80211_proto.c revision 179217
175631Salfred/*- 275631Salfred * Copyright (c) 2001 Atsushi Onoe 375631Salfred * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting 475631Salfred * All rights reserved. 575631Salfred * 675631Salfred * Redistribution and use in source and binary forms, with or without 775631Salfred * modification, are permitted provided that the following conditions 875631Salfred * are met: 975631Salfred * 1. Redistributions of source code must retain the above copyright 1075631Salfred * notice, this list of conditions and the following disclaimer. 1175631Salfred * 2. Redistributions in binary form must reproduce the above copyright 1275631Salfred * notice, this list of conditions and the following disclaimer in the 1375631Salfred * documentation and/or other materials provided with the distribution. 1475631Salfred * 1575631Salfred * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1675631Salfred * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1775631Salfred * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1875631Salfred * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1975631Salfred * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2075631Salfred * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2175631Salfred * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2275631Salfred * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2375631Salfred * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2475631Salfred * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2575631Salfred */ 2675631Salfred 2775631Salfred#include <sys/cdefs.h> 2875631Salfred__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_proto.c 179217 2008-05-22 22:17:27Z sam $"); 2975631Salfred 3075631Salfred/* 3183651Speter * IEEE 802.11 protocol support. 3283651Speter */ 3383651Speter 3475631Salfred#include "opt_inet.h" 3575631Salfred#include "opt_wlan.h" 36138430Sphk 3775631Salfred#include <sys/param.h> 3876166Smarkm#include <sys/kernel.h> 39114216Skan#include <sys/systm.h> 4076166Smarkm#include <sys/taskqueue.h> 4175631Salfred 4276166Smarkm#include <sys/socket.h> 4375631Salfred#include <sys/sockio.h> 4475631Salfred 4575631Salfred#include <net/if.h> 4675631Salfred#include <net/if_media.h> 4776166Smarkm#include <net/ethernet.h> /* XXX for ether_sprintf */ 4875631Salfred 4976166Smarkm#include <net80211/ieee80211_var.h> 5075631Salfred#include <net80211/ieee80211_adhoc.h> 5175631Salfred#include <net80211/ieee80211_sta.h> 5275631Salfred#include <net80211/ieee80211_hostap.h> 5375631Salfred#include <net80211/ieee80211_wds.h> 5475631Salfred#include <net80211/ieee80211_monitor.h> 55122698Salfred#include <net80211/ieee80211_input.h> 56122698Salfred 5775631Salfred/* XXX tunables */ 5875631Salfred#define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ 5983651Speter#define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ 6083651Speter 6183651Speterconst char *ieee80211_mgt_subtype_name[] = { 6283651Speter "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", 6383651Speter "probe_req", "probe_resp", "reserved#6", "reserved#7", 6475631Salfred "beacon", "atim", "disassoc", "auth", 65138430Sphk "deauth", "action", "reserved#14", "reserved#15" 66138430Sphk}; 67138430Sphkconst char *ieee80211_ctl_subtype_name[] = { 6875631Salfred "reserved#0", "reserved#1", "reserved#2", "reserved#3", 69138430Sphk "reserved#3", "reserved#5", "reserved#6", "reserved#7", 70138430Sphk "reserved#8", "reserved#9", "ps_poll", "rts", 71138430Sphk "cts", "ack", "cf_end", "cf_end_ack" 72138430Sphk}; 73138430Sphkconst char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { 74138430Sphk "IBSS", /* IEEE80211_M_IBSS */ 75138430Sphk "STA", /* IEEE80211_M_STA */ 76138430Sphk "WDS", /* IEEE80211_M_WDS */ 77138430Sphk "AHDEMO", /* IEEE80211_M_AHDEMO */ 78138430Sphk "HOSTAP", /* IEEE80211_M_HOSTAP */ 79138430Sphk "MONITOR" /* IEEE80211_M_MONITOR */ 80138430Sphk}; 81138430Sphkconst char *ieee80211_state_name[IEEE80211_S_MAX] = { 82138430Sphk "INIT", /* IEEE80211_S_INIT */ 83138430Sphk "SCAN", /* IEEE80211_S_SCAN */ 84138430Sphk "AUTH", /* IEEE80211_S_AUTH */ 85138430Sphk "ASSOC", /* IEEE80211_S_ASSOC */ 86138430Sphk "CAC", /* IEEE80211_S_CAC */ 87138430Sphk "RUN", /* IEEE80211_S_RUN */ 88138430Sphk "CSA", /* IEEE80211_S_CSA */ 89138430Sphk "SLEEP", /* IEEE80211_S_SLEEP */ 90138430Sphk}; 91138430Sphkconst char *ieee80211_wme_acnames[] = { 92138430Sphk "WME_AC_BE", 93138430Sphk "WME_AC_BK", 94138430Sphk "WME_AC_VI", 95138430Sphk "WME_AC_VO", 96138430Sphk "WME_UPSD", 97138430Sphk}; 98138430Sphk 99138430Sphkstatic void parent_updown(void *, int); 100138430Sphkstatic int ieee80211_new_state_locked(struct ieee80211vap *, 101138430Sphk enum ieee80211_state, int); 102138430Sphk 103138430Sphkstatic int 104138430Sphknull_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 105138430Sphk const struct ieee80211_bpf_params *params) 106138430Sphk{ 107138430Sphk struct ifnet *ifp = ni->ni_ic->ic_ifp; 108138430Sphk 109138430Sphk if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n"); 110138430Sphk m_freem(m); 111138430Sphk return ENETDOWN; 112138430Sphk} 113138430Sphk 114138430Sphkvoid 115138430Sphkieee80211_proto_attach(struct ieee80211com *ic) 116138430Sphk{ 117138430Sphk struct ifnet *ifp = ic->ic_ifp; 118138430Sphk 119138430Sphk /* override the 802.3 setting */ 120138430Sphk ifp->if_hdrlen = ic->ic_headroom 121138430Sphk + sizeof(struct ieee80211_qosframe_addr4) 122138430Sphk + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN 123138430Sphk + IEEE80211_WEP_EXTIVLEN; 124138430Sphk /* XXX no way to recalculate on ifdetach */ 125138430Sphk if (ALIGN(ifp->if_hdrlen) > max_linkhdr) { 126138430Sphk /* XXX sanity check... */ 127138430Sphk max_linkhdr = ALIGN(ifp->if_hdrlen); 128138430Sphk max_hdr = max_linkhdr + max_protohdr; 129138430Sphk max_datalen = MHLEN - max_hdr; 130138430Sphk } 131138430Sphk ic->ic_protmode = IEEE80211_PROT_CTSONLY; 132138430Sphk 133138430Sphk TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp); 134138430Sphk 135138430Sphk ic->ic_wme.wme_hipri_switch_hysteresis = 136138430Sphk AGGRESSIVE_MODE_SWITCH_HYSTERESIS; 137138430Sphk 138138430Sphk /* initialize management frame handlers */ 139138430Sphk ic->ic_send_mgmt = ieee80211_send_mgmt; 140138430Sphk ic->ic_raw_xmit = null_raw_xmit; 141138430Sphk 142138430Sphk ieee80211_adhoc_attach(ic); 143138430Sphk ieee80211_sta_attach(ic); 144138430Sphk ieee80211_wds_attach(ic); 145138430Sphk ieee80211_hostap_attach(ic); 146138430Sphk ieee80211_monitor_attach(ic); 147138430Sphk} 148138430Sphk 149138430Sphkvoid 150138430Sphkieee80211_proto_detach(struct ieee80211com *ic) 151138430Sphk{ 152138430Sphk ieee80211_monitor_detach(ic); 153138430Sphk ieee80211_hostap_detach(ic); 154138430Sphk ieee80211_wds_detach(ic); 155138430Sphk ieee80211_adhoc_detach(ic); 156138430Sphk ieee80211_sta_detach(ic); 157138430Sphk} 158138430Sphk 159138430Sphkstatic void 160138430Sphknull_update_beacon(struct ieee80211vap *vap, int item) 161138430Sphk{ 162138430Sphk} 163138430Sphk 164138430Sphkvoid 165138430Sphkieee80211_proto_vattach(struct ieee80211vap *vap) 166138430Sphk{ 167138430Sphk struct ieee80211com *ic = vap->iv_ic; 168138430Sphk struct ifnet *ifp = vap->iv_ifp; 169138430Sphk int i; 170138430Sphk 171138430Sphk /* override the 802.3 setting */ 172138430Sphk ifp->if_hdrlen = ic->ic_ifp->if_hdrlen; 173138430Sphk 174138430Sphk vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; 175138430Sphk vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; 176138430Sphk vap->iv_bmiss_max = IEEE80211_BMISS_MAX; 177138430Sphk callout_init(&vap->iv_swbmiss, CALLOUT_MPSAFE); 178138430Sphk callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE); 179138430Sphk /* 180138430Sphk * Install default tx rate handling: no fixed rate, lowest 181138430Sphk * supported rate for mgmt and multicast frames. Default 182138430Sphk * max retry count. These settings can be changed by the 183138430Sphk * driver and/or user applications. 184138430Sphk */ 185138430Sphk for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_11NA; i++) { 186138430Sphk const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; 187138430Sphk 188138430Sphk vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 189138430Sphk /* NB: we default to min supported rate for channel */ 190138430Sphk vap->iv_txparms[i].mgmtrate = 191138430Sphk rs->rs_rates[0] & IEEE80211_RATE_VAL; 192138430Sphk vap->iv_txparms[i].mcastrate = 193138430Sphk rs->rs_rates[0] & IEEE80211_RATE_VAL; 194138430Sphk vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 195138430Sphk } 196138430Sphk for (; i < IEEE80211_MODE_MAX; i++) { 197138430Sphk vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; 198138430Sphk /* NB: default to MCS 0 */ 199138430Sphk vap->iv_txparms[i].mgmtrate = 0 | 0x80; 200138430Sphk vap->iv_txparms[i].mcastrate = 0 | 0x80; 201138430Sphk vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; 202138430Sphk } 203138430Sphk vap->iv_roaming = IEEE80211_ROAMING_AUTO; 204138430Sphk 205138430Sphk vap->iv_update_beacon = null_update_beacon; 206138430Sphk vap->iv_deliver_data = ieee80211_deliver_data; 207138430Sphk 208138430Sphk /* attach support for operating mode */ 209138430Sphk ic->ic_vattach[vap->iv_opmode](vap); 21075631Salfred} 21175631Salfred 21283651Spetervoid 21375631Salfredieee80211_proto_vdetach(struct ieee80211vap *vap) 21475631Salfred{ 21575631Salfred#define FREEAPPIE(ie) do { \ 21675631Salfred if (ie != NULL) \ 21775631Salfred FREE(ie, M_80211_NODE_IE); \ 21875631Salfred} while (0) 21975631Salfred /* 22075631Salfred * Detach operating mode module. 22183651Speter */ 22275631Salfred if (vap->iv_opdetach != NULL) 22375631Salfred vap->iv_opdetach(vap); 22483366Sjulian /* 225138430Sphk * This should not be needed as we detach when reseting 226138430Sphk * the state but be conservative here since the 22775631Salfred * authenticator may do things like spawn kernel threads. 228138430Sphk */ 22983366Sjulian if (vap->iv_auth->ia_detach != NULL) 23075631Salfred vap->iv_auth->ia_detach(vap); 23183366Sjulian /* 23283366Sjulian * Detach any ACL'ator. 23383366Sjulian */ 23475631Salfred if (vap->iv_acl != NULL) 23575631Salfred vap->iv_acl->iac_detach(vap); 23675631Salfred 23775631Salfred FREEAPPIE(vap->iv_appie_beacon); 23875631Salfred FREEAPPIE(vap->iv_appie_probereq); 23982174Sache FREEAPPIE(vap->iv_appie_proberesp); 24075631Salfred FREEAPPIE(vap->iv_appie_assocreq); 24182194Sache FREEAPPIE(vap->iv_appie_assocresp); 24282213Sache FREEAPPIE(vap->iv_appie_wpa); 24382204Sache#undef FREEAPPIE 24482204Sache} 24582204Sache 24682194Sache/* 24782204Sache * Simple-minded authenticator module support. 24882204Sache */ 24982194Sache 25082194Sache#define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) 25175631Salfred/* XXX well-known names */ 25275631Salfredstatic const char *auth_modnames[IEEE80211_AUTH_MAX] = { 25375631Salfred "wlan_internal", /* IEEE80211_AUTH_NONE */ 25475631Salfred "wlan_internal", /* IEEE80211_AUTH_OPEN */ 25575631Salfred "wlan_internal", /* IEEE80211_AUTH_SHARED */ 25675631Salfred "wlan_xauth", /* IEEE80211_AUTH_8021X */ 25775631Salfred "wlan_internal", /* IEEE80211_AUTH_AUTO */ 25875631Salfred "wlan_xauth", /* IEEE80211_AUTH_WPA */ 25975631Salfred}; 26075631Salfredstatic const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; 26175631Salfred 262111119Simpstatic const struct ieee80211_authenticator auth_internal = { 26375631Salfred .ia_name = "wlan_internal", 264114434Sdes .ia_attach = NULL, 26575631Salfred .ia_detach = NULL, 26675631Salfred .ia_node_join = NULL, 26775631Salfred .ia_node_leave = NULL, 26875631Salfred}; 26975631Salfred 27075631Salfred/* 27175631Salfred * Setup internal authenticators once; they are never unregistered. 272100134Salfred */ 273100134Salfredstatic void 27475631Salfredieee80211_auth_setup(void) 27575631Salfred{ 27675631Salfred ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); 277101947Salfred ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); 27875631Salfred ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); 27975631Salfred} 280138430SphkSYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); 281138430Sphk 282138430Sphkconst struct ieee80211_authenticator * 28375631Salfredieee80211_authenticator_get(int auth) 284138430Sphk{ 28575631Salfred if (auth >= IEEE80211_AUTH_MAX) 286138430Sphk return NULL; 28775631Salfred if (authenticators[auth] == NULL) 28875631Salfred ieee80211_load_module(auth_modnames[auth]); 28975631Salfred return authenticators[auth]; 29075631Salfred} 29175631Salfred 29283651Spetervoid 29375631Salfredieee80211_authenticator_register(int type, 294116185Srwatson const struct ieee80211_authenticator *auth) 295116185Srwatson{ 296116185Srwatson if (type >= IEEE80211_AUTH_MAX) 297116185Srwatson return; 298116185Srwatson authenticators[type] = auth; 299116185Srwatson} 300116185Srwatson 301116185Srwatsonvoid 30275631Salfredieee80211_authenticator_unregister(int type) 303115415Srwatson{ 304107104Salfred 30575631Salfred if (type >= IEEE80211_AUTH_MAX) 30675631Salfred return; 30775631Salfred authenticators[type] = NULL; 30875631Salfred} 30975631Salfred 31075631Salfred/* 31175631Salfred * Very simple-minded ACL module support. 31275631Salfred */ 31375631Salfred/* XXX just one for now */ 31475631Salfredstatic const struct ieee80211_aclator *acl = NULL; 31575631Salfred 31675631Salfredvoid 31775631Salfredieee80211_aclator_register(const struct ieee80211_aclator *iac) 31875631Salfred{ 31975631Salfred printf("wlan: %s acl policy registered\n", iac->iac_name); 32075631Salfred acl = iac; 32175631Salfred} 32275631Salfred 32375631Salfredvoid 32475631Salfredieee80211_aclator_unregister(const struct ieee80211_aclator *iac) 32575631Salfred{ 32675631Salfred if (acl == iac) 32775631Salfred acl = NULL; 32875631Salfred printf("wlan: %s acl policy unregistered\n", iac->iac_name); 329138430Sphk} 33075631Salfred 33175631Salfredconst struct ieee80211_aclator * 33275631Salfredieee80211_aclator_get(const char *name) 33375631Salfred{ 33475631Salfred if (acl == NULL) 33575631Salfred ieee80211_load_module("wlan_acl"); 336138430Sphk return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; 33786363Srwatson} 33875631Salfred 33986363Srwatsonvoid 34075631Salfredieee80211_print_essid(const uint8_t *essid, int len) 34175631Salfred{ 34275631Salfred const uint8_t *p; 34383651Speter int i; 34477183Srwatson 34577183Srwatson if (len > IEEE80211_NWID_LEN) 34677183Srwatson len = IEEE80211_NWID_LEN; 34775631Salfred /* determine printable or not */ 34893593Sjhb for (i = 0, p = essid; i < len; i++, p++) { 34991406Sjhb if (*p < ' ' || *p > 0x7e) 35075631Salfred break; 35175631Salfred } 35275631Salfred if (i == len) { 35375631Salfred printf("\""); 35475631Salfred for (i = 0, p = essid; i < len; i++, p++) 35575631Salfred printf("%c", *p); 35675631Salfred printf("\""); 35786363Srwatson } else { 35875631Salfred printf("0x"); 35975631Salfred for (i = 0, p = essid; i < len; i++, p++) 36083651Speter printf("%02x", *p); 36175631Salfred } 36275631Salfred} 36375631Salfred 36475631Salfredvoid 36586363Srwatsonieee80211_dump_pkt(struct ieee80211com *ic, 36675631Salfred const uint8_t *buf, int len, int rate, int rssi) 36786363Srwatson{ 36875631Salfred const struct ieee80211_frame *wh; 36986363Srwatson int i; 37086363Srwatson 37175631Salfred wh = (const struct ieee80211_frame *)buf; 37277563Sjake switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 37375631Salfred case IEEE80211_FC1_DIR_NODS: 37486363Srwatson printf("NODS %s", ether_sprintf(wh->i_addr2)); 37586363Srwatson printf("->%s", ether_sprintf(wh->i_addr1)); 37686363Srwatson printf("(%s)", ether_sprintf(wh->i_addr3)); 37775631Salfred break; 378107104Salfred case IEEE80211_FC1_DIR_TODS: 37975631Salfred printf("TODS %s", ether_sprintf(wh->i_addr2)); 38086363Srwatson printf("->%s", ether_sprintf(wh->i_addr3)); 38175631Salfred printf("(%s)", ether_sprintf(wh->i_addr1)); 38275631Salfred break; 383138430Sphk case IEEE80211_FC1_DIR_FROMDS: 384 printf("FRDS %s", ether_sprintf(wh->i_addr3)); 385 printf("->%s", ether_sprintf(wh->i_addr1)); 386 printf("(%s)", ether_sprintf(wh->i_addr2)); 387 break; 388 case IEEE80211_FC1_DIR_DSTODS: 389 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); 390 printf("->%s", ether_sprintf(wh->i_addr3)); 391 printf("(%s", ether_sprintf(wh->i_addr2)); 392 printf("->%s)", ether_sprintf(wh->i_addr1)); 393 break; 394 } 395 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 396 case IEEE80211_FC0_TYPE_DATA: 397 printf(" data"); 398 break; 399 case IEEE80211_FC0_TYPE_MGT: 400 printf(" %s", ieee80211_mgt_subtype_name[ 401 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) 402 >> IEEE80211_FC0_SUBTYPE_SHIFT]); 403 break; 404 default: 405 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); 406 break; 407 } 408 if (IEEE80211_QOS_HAS_SEQ(wh)) { 409 const struct ieee80211_qosframe *qwh = 410 (const struct ieee80211_qosframe *)buf; 411 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, 412 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); 413 } 414 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 415 int off; 416 417 off = ieee80211_anyhdrspace(ic, wh); 418 printf(" WEP [IV %.02x %.02x %.02x", 419 buf[off+0], buf[off+1], buf[off+2]); 420 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) 421 printf(" %.02x %.02x %.02x", 422 buf[off+4], buf[off+5], buf[off+6]); 423 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); 424 } 425 if (rate >= 0) 426 printf(" %dM", rate / 2); 427 if (rssi >= 0) 428 printf(" +%d", rssi); 429 printf("\n"); 430 if (len > 0) { 431 for (i = 0; i < len; i++) { 432 if ((i & 1) == 0) 433 printf(" "); 434 printf("%02x", buf[i]); 435 } 436 printf("\n"); 437 } 438} 439 440static __inline int 441findrix(const struct ieee80211_rateset *rs, int r) 442{ 443 int i; 444 445 for (i = 0; i < rs->rs_nrates; i++) 446 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) 447 return i; 448 return -1; 449} 450 451int 452ieee80211_fix_rate(struct ieee80211_node *ni, 453 struct ieee80211_rateset *nrs, int flags) 454{ 455#define RV(v) ((v) & IEEE80211_RATE_VAL) 456 struct ieee80211vap *vap = ni->ni_vap; 457 struct ieee80211com *ic = ni->ni_ic; 458 int i, j, rix, error; 459 int okrate, badrate, fixedrate, ucastrate; 460 const struct ieee80211_rateset *srs; 461 uint8_t r; 462 463 error = 0; 464 okrate = badrate = 0; 465 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; 466 if (ucastrate != IEEE80211_FIXED_RATE_NONE) { 467 /* 468 * Workaround awkwardness with fixed rate. We are called 469 * to check both the legacy rate set and the HT rate set 470 * but we must apply any legacy fixed rate check only to the 471 * legacy rate set and vice versa. We cannot tell what type 472 * of rate set we've been given (legacy or HT) but we can 473 * distinguish the fixed rate type (MCS have 0x80 set). 474 * So to deal with this the caller communicates whether to 475 * check MCS or legacy rate using the flags and we use the 476 * type of any fixed rate to avoid applying an MCS to a 477 * legacy rate and vice versa. 478 */ 479 if (ucastrate & 0x80) { 480 if (flags & IEEE80211_F_DOFRATE) 481 flags &= ~IEEE80211_F_DOFRATE; 482 } else if ((ucastrate & 0x80) == 0) { 483 if (flags & IEEE80211_F_DOFMCS) 484 flags &= ~IEEE80211_F_DOFMCS; 485 } 486 /* NB: required to make MCS match below work */ 487 ucastrate &= IEEE80211_RATE_VAL; 488 } 489 fixedrate = IEEE80211_FIXED_RATE_NONE; 490 /* 491 * XXX we are called to process both MCS and legacy rates; 492 * we must use the appropriate basic rate set or chaos will 493 * ensue; for now callers that want MCS must supply 494 * IEEE80211_F_DOBRS; at some point we'll need to split this 495 * function so there are two variants, one for MCS and one 496 * for legacy rates. 497 */ 498 if (flags & IEEE80211_F_DOBRS) 499 srs = (const struct ieee80211_rateset *) 500 ieee80211_get_suphtrates(ic, ni->ni_chan); 501 else 502 srs = ieee80211_get_suprates(ic, ni->ni_chan); 503 for (i = 0; i < nrs->rs_nrates; ) { 504 if (flags & IEEE80211_F_DOSORT) { 505 /* 506 * Sort rates. 507 */ 508 for (j = i + 1; j < nrs->rs_nrates; j++) { 509 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { 510 r = nrs->rs_rates[i]; 511 nrs->rs_rates[i] = nrs->rs_rates[j]; 512 nrs->rs_rates[j] = r; 513 } 514 } 515 } 516 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; 517 badrate = r; 518 /* 519 * Check for fixed rate. 520 */ 521 if (r == ucastrate) 522 fixedrate = r; 523 /* 524 * Check against supported rates. 525 */ 526 rix = findrix(srs, r); 527 if (flags & IEEE80211_F_DONEGO) { 528 if (rix < 0) { 529 /* 530 * A rate in the node's rate set is not 531 * supported. If this is a basic rate and we 532 * are operating as a STA then this is an error. 533 * Otherwise we just discard/ignore the rate. 534 */ 535 if ((flags & IEEE80211_F_JOIN) && 536 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) 537 error++; 538 } else if ((flags & IEEE80211_F_JOIN) == 0) { 539 /* 540 * Overwrite with the supported rate 541 * value so any basic rate bit is set. 542 */ 543 nrs->rs_rates[i] = srs->rs_rates[rix]; 544 } 545 } 546 if ((flags & IEEE80211_F_DODEL) && rix < 0) { 547 /* 548 * Delete unacceptable rates. 549 */ 550 nrs->rs_nrates--; 551 for (j = i; j < nrs->rs_nrates; j++) 552 nrs->rs_rates[j] = nrs->rs_rates[j + 1]; 553 nrs->rs_rates[j] = 0; 554 continue; 555 } 556 if (rix >= 0) 557 okrate = nrs->rs_rates[i]; 558 i++; 559 } 560 if (okrate == 0 || error != 0 || 561 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && 562 fixedrate != ucastrate)) { 563 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 564 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " 565 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); 566 return badrate | IEEE80211_RATE_BASIC; 567 } else 568 return RV(okrate); 569#undef RV 570} 571 572/* 573 * Reset 11g-related state. 574 */ 575void 576ieee80211_reset_erp(struct ieee80211com *ic) 577{ 578 ic->ic_flags &= ~IEEE80211_F_USEPROT; 579 ic->ic_nonerpsta = 0; 580 ic->ic_longslotsta = 0; 581 /* 582 * Short slot time is enabled only when operating in 11g 583 * and not in an IBSS. We must also honor whether or not 584 * the driver is capable of doing it. 585 */ 586 ieee80211_set_shortslottime(ic, 587 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 588 IEEE80211_IS_CHAN_HT(ic->ic_curchan) || 589 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 590 ic->ic_opmode == IEEE80211_M_HOSTAP && 591 (ic->ic_caps & IEEE80211_C_SHSLOT))); 592 /* 593 * Set short preamble and ERP barker-preamble flags. 594 */ 595 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 596 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { 597 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 598 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 599 } else { 600 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 601 ic->ic_flags |= IEEE80211_F_USEBARKER; 602 } 603} 604 605/* 606 * Set the short slot time state and notify the driver. 607 */ 608void 609ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) 610{ 611 if (onoff) 612 ic->ic_flags |= IEEE80211_F_SHSLOT; 613 else 614 ic->ic_flags &= ~IEEE80211_F_SHSLOT; 615 /* notify driver */ 616 if (ic->ic_updateslot != NULL) 617 ic->ic_updateslot(ic->ic_ifp); 618} 619 620/* 621 * Check if the specified rate set supports ERP. 622 * NB: the rate set is assumed to be sorted. 623 */ 624int 625ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) 626{ 627#define N(a) (sizeof(a) / sizeof(a[0])) 628 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; 629 int i, j; 630 631 if (rs->rs_nrates < N(rates)) 632 return 0; 633 for (i = 0; i < N(rates); i++) { 634 for (j = 0; j < rs->rs_nrates; j++) { 635 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; 636 if (rates[i] == r) 637 goto next; 638 if (r > rates[i]) 639 return 0; 640 } 641 return 0; 642 next: 643 ; 644 } 645 return 1; 646#undef N 647} 648 649/* 650 * Mark the basic rates for the rate table based on the 651 * operating mode. For real 11g we mark all the 11b rates 652 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only 653 * 11b rates. There's also a pseudo 11a-mode used to mark only 654 * the basic OFDM rates. 655 */ 656static void 657setbasicrates(struct ieee80211_rateset *rs, 658 enum ieee80211_phymode mode, int add) 659{ 660 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { 661 { .rs_nrates = 0 }, /* IEEE80211_MODE_AUTO */ 662 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */ 663 { 2, { 2, 4 } }, /* IEEE80211_MODE_11B */ 664 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11G (mixed b/g) */ 665 { .rs_nrates = 0 }, /* IEEE80211_MODE_FH */ 666 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_TURBO_A */ 667 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_TURBO_G (mixed b/g) */ 668 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_STURBO_A */ 669 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11NA */ 670 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11NG (mixed b/g) */ 671 }; 672 int i, j; 673 674 for (i = 0; i < rs->rs_nrates; i++) { 675 if (!add) 676 rs->rs_rates[i] &= IEEE80211_RATE_VAL; 677 for (j = 0; j < basic[mode].rs_nrates; j++) 678 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { 679 rs->rs_rates[i] |= IEEE80211_RATE_BASIC; 680 break; 681 } 682 } 683} 684 685/* 686 * Set the basic rates in a rate set. 687 */ 688void 689ieee80211_setbasicrates(struct ieee80211_rateset *rs, 690 enum ieee80211_phymode mode) 691{ 692 setbasicrates(rs, mode, 0); 693} 694 695/* 696 * Add basic rates to a rate set. 697 */ 698void 699ieee80211_addbasicrates(struct ieee80211_rateset *rs, 700 enum ieee80211_phymode mode) 701{ 702 setbasicrates(rs, mode, 1); 703} 704 705/* 706 * WME protocol support. 707 * 708 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM 709 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n 710 * Draft 2.0 Test Plan (Appendix D). 711 * 712 * Static/Dynamic Turbo mode settings come from Atheros. 713 */ 714typedef struct phyParamType { 715 uint8_t aifsn; 716 uint8_t logcwmin; 717 uint8_t logcwmax; 718 uint16_t txopLimit; 719 uint8_t acm; 720} paramType; 721 722static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { 723 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_AUTO */ 724 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11A */ 725 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11B */ 726 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11G */ 727 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_FH */ 728 { 2, 3, 5, 0, 0 }, /* IEEE80211_MODE_TURBO_A */ 729 { 2, 3, 5, 0, 0 }, /* IEEE80211_MODE_TURBO_G */ 730 { 2, 3, 5, 0, 0 }, /* IEEE80211_MODE_STURBO_A */ 731 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11NA */ 732 { 3, 4, 6, 0, 0 }, /* IEEE80211_MODE_11NG */ 733}; 734static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { 735 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_AUTO */ 736 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11A */ 737 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11B */ 738 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11G */ 739 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_FH */ 740 { 7, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_A */ 741 { 7, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_G */ 742 { 7, 3, 10, 0, 0 }, /* IEEE80211_MODE_STURBO_A */ 743 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NA */ 744 { 7, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NG */ 745}; 746static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { 747 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_AUTO */ 748 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11A */ 749 { 1, 3, 4, 188, 0 }, /* IEEE80211_MODE_11B */ 750 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11G */ 751 { 1, 3, 4, 188, 0 }, /* IEEE80211_MODE_FH */ 752 { 1, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_A */ 753 { 1, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_G */ 754 { 1, 2, 3, 94, 0 }, /* IEEE80211_MODE_STURBO_A */ 755 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NA */ 756 { 1, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NG */ 757}; 758static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { 759 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_AUTO */ 760 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11A */ 761 { 1, 2, 3, 102, 0 }, /* IEEE80211_MODE_11B */ 762 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11G */ 763 { 1, 2, 3, 102, 0 }, /* IEEE80211_MODE_FH */ 764 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_A */ 765 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_G */ 766 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_STURBO_A */ 767 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NA */ 768 { 1, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NG */ 769}; 770 771static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { 772 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_AUTO */ 773 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11A */ 774 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11B */ 775 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11G */ 776 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_FH */ 777 { 2, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_A */ 778 { 2, 3, 10, 0, 0 }, /* IEEE80211_MODE_TURBO_G */ 779 { 2, 3, 10, 0, 0 }, /* IEEE80211_MODE_STURBO_A */ 780 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NA */ 781 { 3, 4, 10, 0, 0 }, /* IEEE80211_MODE_11NG */ 782}; 783static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { 784 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_AUTO */ 785 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11A */ 786 { 2, 3, 4, 188, 0 }, /* IEEE80211_MODE_11B */ 787 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11G */ 788 { 2, 3, 4, 188, 0 }, /* IEEE80211_MODE_FH */ 789 { 2, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_A */ 790 { 2, 2, 3, 94, 0 }, /* IEEE80211_MODE_TURBO_G */ 791 { 2, 2, 3, 94, 0 }, /* IEEE80211_MODE_STURBO_A */ 792 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NA */ 793 { 2, 3, 4, 94, 0 }, /* IEEE80211_MODE_11NG */ 794}; 795static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { 796 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_AUTO */ 797 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11A */ 798 { 2, 2, 3, 102, 0 }, /* IEEE80211_MODE_11B */ 799 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11G */ 800 { 2, 2, 3, 102, 0 }, /* IEEE80211_MODE_FH */ 801 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_A */ 802 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_TURBO_G */ 803 { 1, 2, 2, 47, 0 }, /* IEEE80211_MODE_STURBO_A */ 804 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NA */ 805 { 2, 2, 3, 47, 0 }, /* IEEE80211_MODE_11NG */ 806}; 807 808static void 809ieee80211_wme_initparams_locked(struct ieee80211vap *vap) 810{ 811 struct ieee80211com *ic = vap->iv_ic; 812 struct ieee80211_wme_state *wme = &ic->ic_wme; 813 const paramType *pPhyParam, *pBssPhyParam; 814 struct wmeParams *wmep; 815 enum ieee80211_phymode mode; 816 int i; 817 818 IEEE80211_LOCK_ASSERT(ic); 819 820 if ((ic->ic_caps & IEEE80211_C_WME) == 0) 821 return; 822 823 /* 824 * Select mode; we can be called early in which case we 825 * always use auto mode. We know we'll be called when 826 * entering the RUN state with bsschan setup properly 827 * so state will eventually get set correctly 828 */ 829 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 830 mode = ieee80211_chan2mode(ic->ic_bsschan); 831 else 832 mode = IEEE80211_MODE_AUTO; 833 for (i = 0; i < WME_NUM_AC; i++) { 834 switch (i) { 835 case WME_AC_BK: 836 pPhyParam = &phyParamForAC_BK[mode]; 837 pBssPhyParam = &phyParamForAC_BK[mode]; 838 break; 839 case WME_AC_VI: 840 pPhyParam = &phyParamForAC_VI[mode]; 841 pBssPhyParam = &bssPhyParamForAC_VI[mode]; 842 break; 843 case WME_AC_VO: 844 pPhyParam = &phyParamForAC_VO[mode]; 845 pBssPhyParam = &bssPhyParamForAC_VO[mode]; 846 break; 847 case WME_AC_BE: 848 default: 849 pPhyParam = &phyParamForAC_BE[mode]; 850 pBssPhyParam = &bssPhyParamForAC_BE[mode]; 851 break; 852 } 853 854 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 855 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 856 wmep->wmep_acm = pPhyParam->acm; 857 wmep->wmep_aifsn = pPhyParam->aifsn; 858 wmep->wmep_logcwmin = pPhyParam->logcwmin; 859 wmep->wmep_logcwmax = pPhyParam->logcwmax; 860 wmep->wmep_txopLimit = pPhyParam->txopLimit; 861 } else { 862 wmep->wmep_acm = pBssPhyParam->acm; 863 wmep->wmep_aifsn = pBssPhyParam->aifsn; 864 wmep->wmep_logcwmin = pBssPhyParam->logcwmin; 865 wmep->wmep_logcwmax = pBssPhyParam->logcwmax; 866 wmep->wmep_txopLimit = pBssPhyParam->txopLimit; 867 868 } 869 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 870 "%s: %s chan [acm %u aifsn %u log2(cwmin) %u " 871 "log2(cwmax) %u txpoLimit %u]\n", __func__ 872 , ieee80211_wme_acnames[i] 873 , wmep->wmep_acm 874 , wmep->wmep_aifsn 875 , wmep->wmep_logcwmin 876 , wmep->wmep_logcwmax 877 , wmep->wmep_txopLimit 878 ); 879 880 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 881 wmep->wmep_acm = pBssPhyParam->acm; 882 wmep->wmep_aifsn = pBssPhyParam->aifsn; 883 wmep->wmep_logcwmin = pBssPhyParam->logcwmin; 884 wmep->wmep_logcwmax = pBssPhyParam->logcwmax; 885 wmep->wmep_txopLimit = pBssPhyParam->txopLimit; 886 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 887 "%s: %s bss [acm %u aifsn %u log2(cwmin) %u " 888 "log2(cwmax) %u txpoLimit %u]\n", __func__ 889 , ieee80211_wme_acnames[i] 890 , wmep->wmep_acm 891 , wmep->wmep_aifsn 892 , wmep->wmep_logcwmin 893 , wmep->wmep_logcwmax 894 , wmep->wmep_txopLimit 895 ); 896 } 897 /* NB: check ic_bss to avoid NULL deref on initial attach */ 898 if (vap->iv_bss != NULL) { 899 /* 900 * Calculate agressive mode switching threshold based 901 * on beacon interval. This doesn't need locking since 902 * we're only called before entering the RUN state at 903 * which point we start sending beacon frames. 904 */ 905 wme->wme_hipri_switch_thresh = 906 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; 907 ieee80211_wme_updateparams(vap); 908 } 909} 910 911void 912ieee80211_wme_initparams(struct ieee80211vap *vap) 913{ 914 struct ieee80211com *ic = vap->iv_ic; 915 916 IEEE80211_LOCK(ic); 917 ieee80211_wme_initparams_locked(vap); 918 IEEE80211_UNLOCK(ic); 919} 920 921/* 922 * Update WME parameters for ourself and the BSS. 923 */ 924void 925ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) 926{ 927 static const paramType phyParam[IEEE80211_MODE_MAX] = { 928 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_AUTO */ 929 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11A */ 930 { 2, 5, 10, 64, 0 }, /* IEEE80211_MODE_11B */ 931 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11G */ 932 { 2, 5, 10, 64, 0 }, /* IEEE80211_MODE_FH */ 933 { 1, 3, 10, 64, 0 }, /* IEEE80211_MODE_TURBO_A */ 934 { 1, 3, 10, 64, 0 }, /* IEEE80211_MODE_TURBO_G */ 935 { 1, 3, 10, 64, 0 }, /* IEEE80211_MODE_STURBO_A */ 936 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11NA */ /*XXXcheck*/ 937 { 2, 4, 10, 64, 0 }, /* IEEE80211_MODE_11NG */ /*XXXcheck*/ 938 }; 939 struct ieee80211com *ic = vap->iv_ic; 940 struct ieee80211_wme_state *wme = &ic->ic_wme; 941 const struct wmeParams *wmep; 942 struct wmeParams *chanp, *bssp; 943 enum ieee80211_phymode mode; 944 int i; 945 946 /* set up the channel access parameters for the physical device */ 947 for (i = 0; i < WME_NUM_AC; i++) { 948 chanp = &wme->wme_chanParams.cap_wmeParams[i]; 949 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; 950 chanp->wmep_aifsn = wmep->wmep_aifsn; 951 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 952 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 953 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 954 955 chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; 956 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; 957 chanp->wmep_aifsn = wmep->wmep_aifsn; 958 chanp->wmep_logcwmin = wmep->wmep_logcwmin; 959 chanp->wmep_logcwmax = wmep->wmep_logcwmax; 960 chanp->wmep_txopLimit = wmep->wmep_txopLimit; 961 } 962 963 /* 964 * Select mode; we can be called early in which case we 965 * always use auto mode. We know we'll be called when 966 * entering the RUN state with bsschan setup properly 967 * so state will eventually get set correctly 968 */ 969 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) 970 mode = ieee80211_chan2mode(ic->ic_bsschan); 971 else 972 mode = IEEE80211_MODE_AUTO; 973 974 /* 975 * This implements agressive mode as found in certain 976 * vendors' AP's. When there is significant high 977 * priority (VI/VO) traffic in the BSS throttle back BE 978 * traffic by using conservative parameters. Otherwise 979 * BE uses agressive params to optimize performance of 980 * legacy/non-QoS traffic. 981 */ 982 if ((vap->iv_opmode == IEEE80211_M_HOSTAP && 983 (wme->wme_flags & WME_F_AGGRMODE) != 0) || 984 (vap->iv_opmode == IEEE80211_M_STA && 985 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || 986 (vap->iv_flags & IEEE80211_F_WME) == 0) { 987 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 988 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 989 990 chanp->wmep_aifsn = bssp->wmep_aifsn = phyParam[mode].aifsn; 991 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 992 phyParam[mode].logcwmin; 993 chanp->wmep_logcwmax = bssp->wmep_logcwmax = 994 phyParam[mode].logcwmax; 995 chanp->wmep_txopLimit = bssp->wmep_txopLimit = 996 (vap->iv_flags & IEEE80211_F_BURST) ? 997 phyParam[mode].txopLimit : 0; 998 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 999 "%s: %s [acm %u aifsn %u log2(cwmin) %u " 1000 "log2(cwmax) %u txpoLimit %u]\n", __func__ 1001 , ieee80211_wme_acnames[WME_AC_BE] 1002 , chanp->wmep_acm 1003 , chanp->wmep_aifsn 1004 , chanp->wmep_logcwmin 1005 , chanp->wmep_logcwmax 1006 , chanp->wmep_txopLimit 1007 ); 1008 } 1009 1010 /* XXX multi-bss */ 1011 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1012 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { 1013 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { 1014 3, /* IEEE80211_MODE_AUTO */ 1015 3, /* IEEE80211_MODE_11A */ 1016 4, /* IEEE80211_MODE_11B */ 1017 3, /* IEEE80211_MODE_11G */ 1018 4, /* IEEE80211_MODE_FH */ 1019 3, /* IEEE80211_MODE_TURBO_A */ 1020 3, /* IEEE80211_MODE_TURBO_G */ 1021 3, /* IEEE80211_MODE_STURBO_A */ 1022 3, /* IEEE80211_MODE_11NA */ 1023 3, /* IEEE80211_MODE_11NG */ 1024 }; 1025 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; 1026 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; 1027 1028 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; 1029 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1030 "%s: %s log2(cwmin) %u\n", __func__ 1031 , ieee80211_wme_acnames[WME_AC_BE] 1032 , chanp->wmep_logcwmin 1033 ); 1034 } 1035 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ 1036 /* 1037 * Arrange for a beacon update and bump the parameter 1038 * set number so associated stations load the new values. 1039 */ 1040 wme->wme_bssChanParams.cap_info = 1041 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; 1042 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); 1043 } 1044 1045 wme->wme_update(ic); 1046 1047 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1048 "%s: WME params updated, cap_info 0x%x\n", __func__, 1049 vap->iv_opmode == IEEE80211_M_STA ? 1050 wme->wme_wmeChanParams.cap_info : 1051 wme->wme_bssChanParams.cap_info); 1052} 1053 1054void 1055ieee80211_wme_updateparams(struct ieee80211vap *vap) 1056{ 1057 struct ieee80211com *ic = vap->iv_ic; 1058 1059 if (ic->ic_caps & IEEE80211_C_WME) { 1060 IEEE80211_LOCK(ic); 1061 ieee80211_wme_updateparams_locked(vap); 1062 IEEE80211_UNLOCK(ic); 1063 } 1064} 1065 1066static void 1067parent_updown(void *arg, int npending) 1068{ 1069 struct ifnet *parent = arg; 1070 1071 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL); 1072} 1073 1074/* 1075 * Start a vap running. If this is the first vap to be 1076 * set running on the underlying device then we 1077 * automatically bring the device up. 1078 */ 1079void 1080ieee80211_start_locked(struct ieee80211vap *vap) 1081{ 1082 struct ifnet *ifp = vap->iv_ifp; 1083 struct ieee80211com *ic = vap->iv_ic; 1084 struct ifnet *parent = ic->ic_ifp; 1085 1086 IEEE80211_LOCK_ASSERT(ic); 1087 1088 IEEE80211_DPRINTF(vap, 1089 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1090 "start running, %d vaps running\n", ic->ic_nrunning); 1091 1092 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1093 /* 1094 * Mark us running. Note that it's ok to do this first; 1095 * if we need to bring the parent device up we defer that 1096 * to avoid dropping the com lock. We expect the device 1097 * to respond to being marked up by calling back into us 1098 * through ieee80211_start_all at which point we'll come 1099 * back in here and complete the work. 1100 */ 1101 ifp->if_drv_flags |= IFF_DRV_RUNNING; 1102 /* 1103 * We are not running; if this we are the first vap 1104 * to be brought up auto-up the parent if necessary. 1105 */ 1106 if (ic->ic_nrunning++ == 0 && 1107 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1108 IEEE80211_DPRINTF(vap, 1109 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1110 "%s: up parent %s\n", __func__, parent->if_xname); 1111 parent->if_flags |= IFF_UP; 1112 taskqueue_enqueue(taskqueue_thread, &ic->ic_parent_task); 1113 return; 1114 } 1115 } 1116 /* 1117 * If the parent is up and running, then kick the 1118 * 802.11 state machine as appropriate. 1119 */ 1120 if ((parent->if_drv_flags & IFF_DRV_RUNNING) && 1121 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { 1122 if (vap->iv_opmode == IEEE80211_M_STA) { 1123#if 0 1124 /* XXX bypasses scan too easily; disable for now */ 1125 /* 1126 * Try to be intelligent about clocking the state 1127 * machine. If we're currently in RUN state then 1128 * we should be able to apply any new state/parameters 1129 * simply by re-associating. Otherwise we need to 1130 * re-scan to select an appropriate ap. 1131 */ 1132 if (vap->iv_state >= IEEE80211_S_RUN) 1133 ieee80211_new_state_locked(vap, 1134 IEEE80211_S_ASSOC, 1); 1135 else 1136#endif 1137 ieee80211_new_state_locked(vap, 1138 IEEE80211_S_SCAN, 0); 1139 } else { 1140 /* 1141 * For monitor+wds mode there's nothing to do but 1142 * start running. Otherwise if this is the first 1143 * vap to be brought up, start a scan which may be 1144 * preempted if the station is locked to a particular 1145 * channel. 1146 */ 1147 /* XXX needed? */ 1148 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, 0); 1149 if (vap->iv_opmode == IEEE80211_M_MONITOR || 1150 vap->iv_opmode == IEEE80211_M_WDS) 1151 ieee80211_new_state_locked(vap, 1152 IEEE80211_S_RUN, -1); 1153 else 1154 ieee80211_new_state_locked(vap, 1155 IEEE80211_S_SCAN, 0); 1156 } 1157 } 1158} 1159 1160/* 1161 * Start a single vap. 1162 */ 1163void 1164ieee80211_init(void *arg) 1165{ 1166 struct ieee80211vap *vap = arg; 1167 1168 /* 1169 * This routine is publicly accessible through the vap's 1170 * if_init method so guard against calls during detach. 1171 * ieee80211_vap_detach null's the backpointer before 1172 * tearing down state to signal any callback should be 1173 * rejected/ignored. 1174 */ 1175 if (vap != NULL) { 1176 IEEE80211_DPRINTF(vap, 1177 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1178 "%s\n", __func__); 1179 1180 IEEE80211_LOCK(vap->iv_ic); 1181 ieee80211_start_locked(vap); 1182 IEEE80211_UNLOCK(vap->iv_ic); 1183 } 1184} 1185 1186/* 1187 * Start all runnable vap's on a device. 1188 */ 1189void 1190ieee80211_start_all(struct ieee80211com *ic) 1191{ 1192 struct ieee80211vap *vap; 1193 1194 IEEE80211_LOCK(ic); 1195 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1196 struct ifnet *ifp = vap->iv_ifp; 1197 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1198 ieee80211_start_locked(vap); 1199 } 1200 IEEE80211_UNLOCK(ic); 1201} 1202 1203/* 1204 * Stop a vap. We force it down using the state machine 1205 * then mark it's ifnet not running. If this is the last 1206 * vap running on the underlying device then we close it 1207 * too to insure it will be properly initialized when the 1208 * next vap is brought up. 1209 */ 1210void 1211ieee80211_stop_locked(struct ieee80211vap *vap) 1212{ 1213 struct ieee80211com *ic = vap->iv_ic; 1214 struct ifnet *ifp = vap->iv_ifp; 1215 struct ifnet *parent = ic->ic_ifp; 1216 1217 IEEE80211_LOCK_ASSERT(ic); 1218 1219 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1220 "stop running, %d vaps running\n", ic->ic_nrunning); 1221 1222 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); 1223 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1224 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ 1225 if (--ic->ic_nrunning == 0 && 1226 (parent->if_drv_flags & IFF_DRV_RUNNING)) { 1227 IEEE80211_DPRINTF(vap, 1228 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 1229 "down parent %s\n", parent->if_xname); 1230 parent->if_flags &= ~IFF_UP; 1231 taskqueue_enqueue(taskqueue_thread, &ic->ic_parent_task); 1232 } 1233 } 1234} 1235 1236void 1237ieee80211_stop(struct ieee80211vap *vap) 1238{ 1239 struct ieee80211com *ic = vap->iv_ic; 1240 1241 IEEE80211_LOCK(ic); 1242 ieee80211_stop_locked(vap); 1243 IEEE80211_UNLOCK(ic); 1244} 1245 1246/* 1247 * Stop all vap's running on a device. 1248 */ 1249void 1250ieee80211_stop_all(struct ieee80211com *ic) 1251{ 1252 struct ieee80211vap *vap; 1253 1254 IEEE80211_LOCK(ic); 1255 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1256 struct ifnet *ifp = vap->iv_ifp; 1257 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ 1258 ieee80211_stop_locked(vap); 1259 } 1260 IEEE80211_UNLOCK(ic); 1261} 1262 1263/* 1264 * Switch between turbo and non-turbo operating modes. 1265 * Use the specified channel flags to locate the new 1266 * channel, update 802.11 state, and then call back into 1267 * the driver to effect the change. 1268 */ 1269void 1270ieee80211_dturbo_switch(struct ieee80211vap *vap, int newflags) 1271{ 1272 struct ieee80211com *ic = vap->iv_ic; 1273 struct ieee80211_channel *chan; 1274 1275 chan = ieee80211_find_channel(ic, ic->ic_bsschan->ic_freq, newflags); 1276 if (chan == NULL) { /* XXX should not happen */ 1277 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 1278 "%s: no channel with freq %u flags 0x%x\n", 1279 __func__, ic->ic_bsschan->ic_freq, newflags); 1280 return; 1281 } 1282 1283 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, 1284 "%s: %s -> %s (freq %u flags 0x%x)\n", __func__, 1285 ieee80211_phymode_name[ieee80211_chan2mode(ic->ic_bsschan)], 1286 ieee80211_phymode_name[ieee80211_chan2mode(chan)], 1287 chan->ic_freq, chan->ic_flags); 1288 1289 ic->ic_bsschan = chan; 1290 ic->ic_prevchan = ic->ic_curchan; 1291 ic->ic_curchan = chan; 1292 ic->ic_set_channel(ic); 1293 /* NB: do not need to reset ERP state 'cuz we're in sta mode */ 1294} 1295 1296void 1297ieee80211_beacon_miss(struct ieee80211com *ic) 1298{ 1299 struct ieee80211vap *vap; 1300 1301 if (ic->ic_flags & IEEE80211_F_SCAN) 1302 return; 1303 /* XXX locking */ 1304 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1305 /* 1306 * We only pass events through for sta vap's in RUN state; 1307 * may be too restrictive but for now this saves all the 1308 * handlers duplicating these checks. 1309 */ 1310 if (vap->iv_opmode == IEEE80211_M_STA && 1311 vap->iv_state == IEEE80211_S_RUN && 1312 vap->iv_bmiss != NULL) 1313 vap->iv_bmiss(vap); 1314 } 1315} 1316 1317/* 1318 * Software beacon miss handling. Check if any beacons 1319 * were received in the last period. If not post a 1320 * beacon miss; otherwise reset the counter. 1321 */ 1322void 1323ieee80211_swbmiss(void *arg) 1324{ 1325 struct ieee80211vap *vap = arg; 1326 struct ieee80211com *ic = vap->iv_ic; 1327 1328 /* XXX sleep state? */ 1329 KASSERT(vap->iv_state == IEEE80211_S_RUN, 1330 ("wrong state %d", vap->iv_state)); 1331 1332 if (ic->ic_flags & IEEE80211_F_SCAN) { 1333 /* 1334 * If scanning just ignore and reset state. If we get a 1335 * bmiss after coming out of scan because we haven't had 1336 * time to receive a beacon then we should probe the AP 1337 * before posting a real bmiss (unless iv_bmiss_max has 1338 * been artifiically lowered). A cleaner solution might 1339 * be to disable the timer on scan start/end but to handle 1340 * case of multiple sta vap's we'd need to disable the 1341 * timers of all affected vap's. 1342 */ 1343 vap->iv_swbmiss_count = 0; 1344 } else if (vap->iv_swbmiss_count == 0) { 1345 if (vap->iv_bmiss != NULL) 1346 vap->iv_bmiss(vap); 1347 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */ 1348 return; 1349 } else 1350 vap->iv_swbmiss_count = 0; 1351 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 1352 ieee80211_swbmiss, vap); 1353} 1354 1355/* 1356 * Start an 802.11h channel switch. We record the parameters, 1357 * mark the operation pending, notify each vap through the 1358 * beacon update mechanism so it can update the beacon frame 1359 * contents, and then switch vap's to CSA state to block outbound 1360 * traffic. Devices that handle CSA directly can use the state 1361 * switch to do the right thing so long as they call 1362 * ieee80211_csa_completeswitch when it's time to complete the 1363 * channel change. Devices that depend on the net80211 layer can 1364 * use ieee80211_beacon_update to handle the countdown and the 1365 * channel switch. 1366 */ 1367void 1368ieee80211_csa_startswitch(struct ieee80211com *ic, 1369 struct ieee80211_channel *c, int mode, int count) 1370{ 1371 struct ieee80211vap *vap; 1372 1373 IEEE80211_LOCK_ASSERT(ic); 1374 1375 ic->ic_csa_newchan = c; 1376 ic->ic_csa_count = count; 1377 /* XXX record mode? */ 1378 ic->ic_flags |= IEEE80211_F_CSAPENDING; 1379 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1380 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 1381 vap->iv_opmode == IEEE80211_M_IBSS) 1382 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); 1383 /* switch to CSA state to block outbound traffic */ 1384 if (vap->iv_state == IEEE80211_S_RUN) 1385 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); 1386 } 1387 ieee80211_notify_csa(ic, c, mode, count); 1388} 1389 1390/* 1391 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. 1392 * We clear state and move all vap's in CSA state to RUN state 1393 * so they can again transmit. 1394 */ 1395void 1396ieee80211_csa_completeswitch(struct ieee80211com *ic) 1397{ 1398 struct ieee80211vap *vap; 1399 1400 IEEE80211_LOCK_ASSERT(ic); 1401 1402 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); 1403 1404 ieee80211_setcurchan(ic, ic->ic_csa_newchan); 1405 ic->ic_csa_newchan = NULL; 1406 ic->ic_flags &= ~IEEE80211_F_CSAPENDING; 1407 1408 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1409 if (vap->iv_state == IEEE80211_S_CSA) 1410 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1411} 1412 1413/* 1414 * Complete a DFS CAC started by ieee80211_dfs_cac_start. 1415 * We clear state and move all vap's in CAC state to RUN state. 1416 */ 1417void 1418ieee80211_cac_completeswitch(struct ieee80211vap *vap0) 1419{ 1420 struct ieee80211com *ic = vap0->iv_ic; 1421 struct ieee80211vap *vap; 1422 1423 IEEE80211_LOCK(ic); 1424 /* 1425 * Complete CAC state change for lead vap first; then 1426 * clock all the other vap's waiting. 1427 */ 1428 KASSERT(vap0->iv_state == IEEE80211_S_CAC, 1429 ("wrong state %d", vap0->iv_state)); 1430 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); 1431 1432 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 1433 if (vap->iv_state == IEEE80211_S_CAC) 1434 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); 1435 IEEE80211_UNLOCK(ic); 1436} 1437 1438/* 1439 * Force all vap's other than the specified vap to the INIT state 1440 * and mark them as waiting for a scan to complete. These vaps 1441 * will be brought up when the scan completes and the scanning vap 1442 * reaches RUN state by wakeupwaiting. 1443 * XXX if we do this in threads we can use sleep/wakeup. 1444 */ 1445static void 1446markwaiting(struct ieee80211vap *vap0) 1447{ 1448 struct ieee80211com *ic = vap0->iv_ic; 1449 struct ieee80211vap *vap; 1450 1451 IEEE80211_LOCK_ASSERT(ic); 1452 1453 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1454 if (vap == vap0) 1455 continue; 1456 if (vap->iv_state != IEEE80211_S_INIT) { 1457 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 1458 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1459 } 1460 } 1461} 1462 1463/* 1464 * Wakeup all vap's waiting for a scan to complete. This is the 1465 * companion to markwaiting (above) and is used to coordinate 1466 * multiple vaps scanning. 1467 */ 1468static void 1469wakeupwaiting(struct ieee80211vap *vap0) 1470{ 1471 struct ieee80211com *ic = vap0->iv_ic; 1472 struct ieee80211vap *vap; 1473 1474 IEEE80211_LOCK_ASSERT(ic); 1475 1476 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1477 if (vap == vap0) 1478 continue; 1479 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { 1480 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1481 /* NB: sta's cannot go INIT->RUN */ 1482 vap->iv_newstate(vap, 1483 vap->iv_opmode == IEEE80211_M_STA ? 1484 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); 1485 } 1486 } 1487} 1488 1489/* 1490 * Handle post state change work common to all operating modes. 1491 */ 1492static void 1493ieee80211_newstate_cb(struct ieee80211vap *vap, 1494 enum ieee80211_state nstate, int arg) 1495{ 1496 struct ieee80211com *ic = vap->iv_ic; 1497 1498 IEEE80211_LOCK_ASSERT(ic); 1499 1500 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1501 "%s: %s arg %d\n", __func__, ieee80211_state_name[nstate], arg); 1502 1503 if (nstate == IEEE80211_S_RUN) { 1504 /* 1505 * OACTIVE may be set on the vap if the upper layer 1506 * tried to transmit (e.g. IPv6 NDP) before we reach 1507 * RUN state. Clear it and restart xmit. 1508 * 1509 * Note this can also happen as a result of SLEEP->RUN 1510 * (i.e. coming out of power save mode). 1511 */ 1512 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1513 if_start(vap->iv_ifp); 1514 1515 /* bring up any vaps waiting on us */ 1516 wakeupwaiting(vap); 1517 } else if (nstate == IEEE80211_S_INIT) { 1518 /* 1519 * Flush the scan cache if we did the last scan (XXX?) 1520 * and flush any frames on send queues from this vap. 1521 * Note the mgt q is used only for legacy drivers and 1522 * will go away shortly. 1523 */ 1524 ieee80211_scan_flush(vap); 1525 1526 /* XXX NB: cast for altq */ 1527 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap); 1528 } 1529 vap->iv_newstate_cb = NULL; 1530} 1531 1532/* 1533 * Public interface for initiating a state machine change. 1534 * This routine single-threads the request and coordinates 1535 * the scheduling of multiple vaps for the purpose of selecting 1536 * an operating channel. Specifically the following scenarios 1537 * are handled: 1538 * o only one vap can be selecting a channel so on transition to 1539 * SCAN state if another vap is already scanning then 1540 * mark the caller for later processing and return without 1541 * doing anything (XXX? expectations by caller of synchronous operation) 1542 * o only one vap can be doing CAC of a channel so on transition to 1543 * CAC state if another vap is already scanning for radar then 1544 * mark the caller for later processing and return without 1545 * doing anything (XXX? expectations by caller of synchronous operation) 1546 * o if another vap is already running when a request is made 1547 * to SCAN then an operating channel has been chosen; bypass 1548 * the scan and just join the channel 1549 * 1550 * Note that the state change call is done through the iv_newstate 1551 * method pointer so any driver routine gets invoked. The driver 1552 * will normally call back into operating mode-specific 1553 * ieee80211_newstate routines (below) unless it needs to completely 1554 * bypass the state machine (e.g. because the firmware has it's 1555 * own idea how things should work). Bypassing the net80211 layer 1556 * is usually a mistake and indicates lack of proper integration 1557 * with the net80211 layer. 1558 */ 1559static int 1560ieee80211_new_state_locked(struct ieee80211vap *vap, 1561 enum ieee80211_state nstate, int arg) 1562{ 1563 struct ieee80211com *ic = vap->iv_ic; 1564 struct ieee80211vap *vp; 1565 enum ieee80211_state ostate; 1566 int nrunning, nscanning, rc; 1567 1568 IEEE80211_LOCK_ASSERT(ic); 1569 1570 nrunning = nscanning = 0; 1571 /* XXX can track this state instead of calculating */ 1572 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { 1573 if (vp != vap) { 1574 if (vp->iv_state >= IEEE80211_S_RUN) 1575 nrunning++; 1576 /* XXX doesn't handle bg scan */ 1577 /* NB: CAC+AUTH+ASSOC treated like SCAN */ 1578 else if (vp->iv_state > IEEE80211_S_INIT) 1579 nscanning++; 1580 } 1581 } 1582 ostate = vap->iv_state; 1583 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1584 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, 1585 ieee80211_state_name[ostate], ieee80211_state_name[nstate], 1586 nrunning, nscanning); 1587 switch (nstate) { 1588 case IEEE80211_S_SCAN: 1589 if (ostate == IEEE80211_S_INIT) { 1590 /* 1591 * INIT -> SCAN happens on initial bringup. 1592 */ 1593 KASSERT(!(nscanning && nrunning), 1594 ("%d scanning and %d running", nscanning, nrunning)); 1595 if (nscanning) { 1596 /* 1597 * Someone is scanning, defer our state 1598 * change until the work has completed. 1599 */ 1600 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1601 "%s: defer %s -> %s\n", 1602 __func__, ieee80211_state_name[ostate], 1603 ieee80211_state_name[nstate]); 1604 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1605 rc = 0; 1606 goto done; 1607 } 1608 if (nrunning) { 1609 /* 1610 * Someone is operating; just join the channel 1611 * they have chosen. 1612 */ 1613 /* XXX kill arg? */ 1614 /* XXX check each opmode, adhoc? */ 1615 if (vap->iv_opmode == IEEE80211_M_STA) 1616 nstate = IEEE80211_S_SCAN; 1617 else 1618 nstate = IEEE80211_S_RUN; 1619#ifdef IEEE80211_DEBUG 1620 if (nstate != IEEE80211_S_SCAN) { 1621 IEEE80211_DPRINTF(vap, 1622 IEEE80211_MSG_STATE, 1623 "%s: override, now %s -> %s\n", 1624 __func__, 1625 ieee80211_state_name[ostate], 1626 ieee80211_state_name[nstate]); 1627 } 1628#endif 1629 } 1630 } else { 1631 /* 1632 * SCAN was forced; e.g. on beacon miss. Force 1633 * other running vap's to INIT state and mark 1634 * them as waiting for the scan to complete. This 1635 * insures they don't interfere with our scanning. 1636 * 1637 * XXX not always right, assumes ap follows sta 1638 */ 1639 markwaiting(vap); 1640 } 1641 break; 1642 case IEEE80211_S_RUN: 1643 if (vap->iv_opmode == IEEE80211_M_WDS && 1644 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && 1645 nscanning) { 1646 /* 1647 * Legacy WDS with someone else scanning; don't 1648 * go online until that completes as we should 1649 * follow the other vap to the channel they choose. 1650 */ 1651 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1652 "%s: defer %s -> %s (legacy WDS)\n", __func__, 1653 ieee80211_state_name[ostate], 1654 ieee80211_state_name[nstate]); 1655 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; 1656 rc = 0; 1657 goto done; 1658 } 1659 if (vap->iv_opmode == IEEE80211_M_HOSTAP && 1660 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && 1661 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && 1662 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { 1663 /* 1664 * This is a DFS channel, transition to CAC state 1665 * instead of RUN. This allows us to initiate 1666 * Channel Availability Check (CAC) as specified 1667 * by 11h/DFS. 1668 */ 1669 nstate = IEEE80211_S_CAC; 1670 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 1671 "%s: override %s -> %s (DFS)\n", __func__, 1672 ieee80211_state_name[ostate], 1673 ieee80211_state_name[nstate]); 1674 } 1675 break; 1676 case IEEE80211_S_INIT: 1677 if (ostate == IEEE80211_S_INIT ) { 1678 /* XXX don't believe this */ 1679 /* INIT -> INIT. nothing to do */ 1680 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; 1681 } 1682 /* fall thru... */ 1683 default: 1684 break; 1685 } 1686 /* XXX on transition RUN->CAC do we need to set nstate = iv_state? */ 1687 if (ostate != nstate) { 1688 /* 1689 * Arrange for work to happen after state change completes. 1690 * If this happens asynchronously the caller must arrange 1691 * for the com lock to be held. 1692 */ 1693 vap->iv_newstate_cb = ieee80211_newstate_cb; 1694 } 1695 rc = vap->iv_newstate(vap, nstate, arg); 1696 if (rc == 0 && vap->iv_newstate_cb != NULL) 1697 vap->iv_newstate_cb(vap, nstate, arg); 1698done: 1699 return rc; 1700} 1701 1702int 1703ieee80211_new_state(struct ieee80211vap *vap, 1704 enum ieee80211_state nstate, int arg) 1705{ 1706 struct ieee80211com *ic = vap->iv_ic; 1707 int rc; 1708 1709 IEEE80211_LOCK(ic); 1710 rc = ieee80211_new_state_locked(vap, nstate, arg); 1711 IEEE80211_UNLOCK(ic); 1712 return rc; 1713} 1714