/* $NetBSD: ieee80211_proto.c,v 1.26 2006/08/30 15:40:00 christos Exp $ */ /*- * 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 #ifdef __FreeBSD__ __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_proto.c,v 1.23 2005/08/10 16:22:29 sam Exp $"); #endif #ifdef __NetBSD__ __KERNEL_RCSID(0, "$NetBSD: ieee80211_proto.c,v 1.26 2006/08/30 15:40:00 christos Exp $"); #endif /* * IEEE 802.11 protocol support. */ #include "opt_inet.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #include /* 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; 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; /* 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_PURGE(&ic->ic_mgtq); /* * 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); } const struct ieee80211_authenticator * ieee80211_authenticator_get(int auth) { static int initialized = 0; if (!initialized) { ieee80211_auth_setup(); initialized = 1; } 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) { 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. */ #ifndef IEEE80211_NO_HOSTAP if (ic->ic_opmode == IEEE80211_M_HOSTAP && (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) error++; #endif /* !IEEE80211_NO_HOSTAP */ 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]; ni->ni_txrate = 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[] = { { .rs_nrates = 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) */ { .rs_nrates = 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, 0, 0, }, /* IEEE80211_MODE_AUTO */ { 3, 4, 6, 0, 0, }, /* IEEE80211_MODE_11A */ { 3, 5, 7, 0, 0, }, /* IEEE80211_MODE_11B */ { 3, 4, 6, 0, 0, }, /* IEEE80211_MODE_11G */ { 3, 5, 7, 0, 0, }, /* IEEE80211_MODE_FH */ { 2, 3, 5, 0, 0, }, /* IEEE80211_MODE_TURBO_A */ { 2, 3, 5, 0, 0, }, /* IEEE80211_MODE_TURBO_G */ }; static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { { 7, 4, 10, 0, 0, }, /* IEEE80211_MODE_AUTO */ { 7, 4, 10, 0, 0, }, /* IEEE80211_MODE_11A */ { 7, 5, 10, 0, 0, }, /* IEEE80211_MODE_11B */ { 7, 4, 10, 0, 0, }, /* IEEE80211_MODE_11G */ { 7, 5, 10, 0, 0, }, /* IEEE80211_MODE_FH */ { 7, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_A */ { 7, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_G */ }; static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { { 1, 3, 4, 94, 0, }, /* IEEE80211_MODE_AUTO */ { 1, 3, 4, 94, 0, }, /* IEEE80211_MODE_11A */ { 1, 4, 5, 188, 0, }, /* IEEE80211_MODE_11B */ { 1, 3, 4, 94, 0, }, /* IEEE80211_MODE_11G */ { 1, 4, 5, 188, 0, }, /* IEEE80211_MODE_FH */ { 1, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_A */ { 1, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_G */ }; static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { { 1, 2, 3, 47, 0, }, /* IEEE80211_MODE_AUTO */ { 1, 2, 3, 47, 0, }, /* IEEE80211_MODE_11A */ { 1, 3, 4, 102, 0, }, /* IEEE80211_MODE_11B */ { 1, 2, 3, 47, 0, }, /* IEEE80211_MODE_11G */ { 1, 3, 4, 102, 0, }, /* IEEE80211_MODE_FH */ { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_A */ { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_G */ }; static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { { 3, 4, 10, 0, 0, }, /* IEEE80211_MODE_AUTO */ { 3, 4, 10, 0, 0, }, /* IEEE80211_MODE_11A */ { 3, 5, 10, 0, 0, }, /* IEEE80211_MODE_11B */ { 3, 4, 10, 0, 0, }, /* IEEE80211_MODE_11G */ { 3, 5, 10, 0, 0, }, /* IEEE80211_MODE_FH */ { 2, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_A */ { 2, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_G */ }; static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { { 2, 3, 4, 94, 0, }, /* IEEE80211_MODE_AUTO */ { 2, 3, 4, 94, 0, }, /* IEEE80211_MODE_11A */ { 2, 4, 5, 188, 0, }, /* IEEE80211_MODE_11B */ { 2, 3, 4, 94, 0, }, /* IEEE80211_MODE_11G */ { 2, 4, 5, 188, 0, }, /* IEEE80211_MODE_FH */ { 2, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_A */ { 2, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_G */ }; static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { { 2, 2, 3, 47, 0, }, /* IEEE80211_MODE_AUTO */ { 2, 2, 3, 47, 0, }, /* IEEE80211_MODE_11A */ { 2, 3, 4, 102, 0, }, /* IEEE80211_MODE_11B */ { 2, 2, 3, 47, 0, }, /* IEEE80211_MODE_11G */ { 2, 3, 4, 102, 0, }, /* IEEE80211_MODE_FH */ { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_A */ { 1, 2, 2, 47, 0, }, /* 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, 0, }, /* IEEE80211_MODE_AUTO */ { 2, 4, 10, 64, 0, }, /* IEEE80211_MODE_11A */ { 2, 5, 10, 64, 0, }, /* IEEE80211_MODE_11B */ { 2, 4, 10, 64, 0, }, /* IEEE80211_MODE_11G */ { 2, 5, 10, 64, 0, }, /* IEEE80211_MODE_FH */ { 1, 3, 10, 64, 0, }, /* IEEE80211_MODE_TURBO_A */ { 1, 3, 10, 64, 0, }, /* 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_HOSTAP && (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_caps & IEEE80211_C_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 ); } #ifndef IEEE80211_NO_HOSTAP 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; } #endif /* !IEEE80211_NO_HOSTAP */ 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); } } #ifndef IEEE80211_NO_HOSTAP 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); } } #endif /* !IEEE80211_NO_HOSTAP */ 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); } #ifndef IEEE80211_NO_HOSTAP 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); } #endif /* !IEEE80211_NO_HOSTAP */ 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 */ 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: #ifndef IEEE80211_NO_HOSTAP ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, ic); #endif /* !IEEE80211_NO_HOSTAP */ 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: #ifndef IEEE80211_NO_HOSTAP ieee80211_iterate_nodes(&ic->ic_sta, sta_deauth, ic); #endif /* !IEEE80211_NO_HOSTAP */ 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_PURGE(&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 */ IASSERT(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); (*ifp->if_start)(ifp); /* XXX not authorized yet */ break; } /* * 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; }