2078 lines
60 KiB
C
2078 lines
60 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/ethernet.h>
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#include <net80211/ieee80211_var.h>
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#include <net/bpf.h>
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/*
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* Association id's are managed with a bit vector.
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*/
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#define IEEE80211_AID_SET(b, w) \
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((w)[IEEE80211_AID(b) / 32] |= (1 << (IEEE80211_AID(b) % 32)))
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#define IEEE80211_AID_CLR(b, w) \
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((w)[IEEE80211_AID(b) / 32] &= ~(1 << (IEEE80211_AID(b) % 32)))
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#define IEEE80211_AID_ISSET(b, w) \
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((w)[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32)))
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#ifdef IEEE80211_DEBUG_REFCNT
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#define REFCNT_LOC "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line
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#else
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#define REFCNT_LOC "%s %p<%s> refcnt %d\n", __func__
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#endif
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static int ieee80211_sta_join1(struct ieee80211_node *);
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static struct ieee80211_node *node_alloc(struct ieee80211_node_table *);
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static void node_cleanup(struct ieee80211_node *);
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static void node_free(struct ieee80211_node *);
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static int8_t node_getrssi(const struct ieee80211_node *);
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static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *);
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static void ieee80211_setup_node(struct ieee80211_node_table *,
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struct ieee80211_node *, const uint8_t *);
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static void _ieee80211_free_node(struct ieee80211_node *);
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static void ieee80211_node_table_init(struct ieee80211com *ic,
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struct ieee80211_node_table *nt, const char *name,
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int inact, int keymaxix);
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static void ieee80211_node_table_reset(struct ieee80211_node_table *);
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static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt);
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static void ieee80211_erp_timeout(struct ieee80211com *);
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MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state");
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void
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ieee80211_node_attach(struct ieee80211com *ic)
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{
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ic->ic_node_alloc = node_alloc;
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ic->ic_node_free = node_free;
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ic->ic_node_cleanup = node_cleanup;
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ic->ic_node_getrssi = node_getrssi;
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ic->ic_node_getsignal = node_getsignal;
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/* default station inactivity timer setings */
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ic->ic_inact_init = IEEE80211_INACT_INIT;
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ic->ic_inact_auth = IEEE80211_INACT_AUTH;
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ic->ic_inact_run = IEEE80211_INACT_RUN;
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ic->ic_inact_probe = IEEE80211_INACT_PROBE;
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callout_init(&ic->ic_inact, CALLOUT_MPSAFE);
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/* NB: driver should override */
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ic->ic_max_aid = IEEE80211_AID_DEF;
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ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */
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}
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void
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ieee80211_node_lateattach(struct ieee80211com *ic)
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{
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struct ieee80211_rsnparms *rsn;
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if (ic->ic_max_aid > IEEE80211_AID_MAX)
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ic->ic_max_aid = IEEE80211_AID_MAX;
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MALLOC(ic->ic_aid_bitmap, uint32_t *,
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howmany(ic->ic_max_aid, 32) * sizeof(uint32_t),
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M_80211_NODE, M_NOWAIT | M_ZERO);
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if (ic->ic_aid_bitmap == NULL) {
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/* XXX no way to recover */
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printf("%s: no memory for AID bitmap!\n", __func__);
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ic->ic_max_aid = 0;
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}
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ieee80211_node_table_init(ic, &ic->ic_sta, "station",
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IEEE80211_INACT_INIT, ic->ic_crypto.cs_max_keyix);
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ieee80211_reset_bss(ic);
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/*
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* Setup "global settings" in the bss node so that
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* each new station automatically inherits them.
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*/
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rsn = &ic->ic_bss->ni_rsn;
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/* WEP, TKIP, and AES-CCM are always supported */
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rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_WEP;
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rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_TKIP;
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rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_CCM;
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if (ic->ic_caps & IEEE80211_C_AES)
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rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_AES_OCB;
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if (ic->ic_caps & IEEE80211_C_CKIP)
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rsn->rsn_ucastcipherset |= 1<<IEEE80211_CIPHER_CKIP;
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/*
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* Default unicast cipher to WEP for 802.1x use. If
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* WPA is enabled the management code will set these
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* values to reflect.
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*/
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rsn->rsn_ucastcipher = IEEE80211_CIPHER_WEP;
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rsn->rsn_ucastkeylen = 104 / NBBY;
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/*
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* WPA says the multicast cipher is the lowest unicast
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* cipher supported. But we skip WEP which would
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* otherwise be used based on this criteria.
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*/
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rsn->rsn_mcastcipher = IEEE80211_CIPHER_TKIP;
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rsn->rsn_mcastkeylen = 128 / NBBY;
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/*
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* We support both WPA-PSK and 802.1x; the one used
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* is determined by the authentication mode and the
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* setting of the PSK state.
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*/
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rsn->rsn_keymgmtset = WPA_ASE_8021X_UNSPEC | WPA_ASE_8021X_PSK;
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rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
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ic->ic_auth = ieee80211_authenticator_get(ic->ic_bss->ni_authmode);
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}
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void
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ieee80211_node_detach(struct ieee80211com *ic)
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{
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if (ic->ic_bss != NULL) {
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ieee80211_free_node(ic->ic_bss);
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ic->ic_bss = NULL;
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}
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ieee80211_node_table_cleanup(&ic->ic_sta);
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if (ic->ic_aid_bitmap != NULL) {
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FREE(ic->ic_aid_bitmap, M_80211_NODE);
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ic->ic_aid_bitmap = NULL;
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}
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}
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/*
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* Port authorize/unauthorize interfaces for use by an authenticator.
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*/
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void
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ieee80211_node_authorize(struct ieee80211_node *ni)
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{
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struct ieee80211com *ic = ni->ni_ic;
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ni->ni_flags |= IEEE80211_NODE_AUTH;
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ni->ni_inact_reload = ic->ic_inact_run;
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ni->ni_inact = ni->ni_inact_reload;
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}
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void
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ieee80211_node_unauthorize(struct ieee80211_node *ni)
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{
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struct ieee80211com *ic = ni->ni_ic;
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ni->ni_flags &= ~IEEE80211_NODE_AUTH;
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ni->ni_inact_reload = ic->ic_inact_auth;
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if (ni->ni_inact > ni->ni_inact_reload)
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ni->ni_inact = ni->ni_inact_reload;
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}
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/*
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* Set/change the channel. The rate set is also updated as
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* to insure a consistent view by drivers.
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*/
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static void
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ieee80211_node_set_chan(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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struct ieee80211_channel *chan = ic->ic_bsschan;
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#if 0
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KASSERT(chan != IEEE80211_CHAN_ANYC, ("bss channel not setup"));
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#else
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if (chan == IEEE80211_CHAN_ANYC) /* XXX while scanning */
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chan = ic->ic_curchan;
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#endif
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ni->ni_chan = chan;
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if (IEEE80211_IS_CHAN_HT(chan)) {
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/*
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* XXX Gotta be careful here; the rate set returned by
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* ieee80211_get_suprates is actually any HT rate
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* set so blindly copying it will be bad. We must
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* install the legacy rate est in ni_rates and the
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* HT rate set in ni_htrates.
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*/
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ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan);
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}
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ni->ni_rates = *ieee80211_get_suprates(ic, chan);
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}
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/*
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* Probe the curent channel, if allowed, while scanning.
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* If the channel is not marked passive-only then send
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* a probe request immediately. Otherwise mark state and
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* listen for beacons on the channel; if we receive something
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* then we'll transmit a probe request.
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*/
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void
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ieee80211_probe_curchan(struct ieee80211com *ic, int force)
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{
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struct ifnet *ifp = ic->ic_ifp;
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if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0 || force) {
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/*
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* XXX send both broadcast+directed probe request
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*/
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ieee80211_send_probereq(ic->ic_bss,
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ic->ic_myaddr, ifp->if_broadcastaddr,
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ifp->if_broadcastaddr,
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ic->ic_des_ssid[0].ssid, ic->ic_des_ssid[0].len,
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ic->ic_opt_ie, ic->ic_opt_ie_len);
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} else
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ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN;
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}
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static __inline void
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copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss)
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{
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/* propagate useful state */
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nbss->ni_authmode = obss->ni_authmode;
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nbss->ni_txpower = obss->ni_txpower;
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nbss->ni_vlan = obss->ni_vlan;
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nbss->ni_rsn = obss->ni_rsn;
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/* XXX statistics? */
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}
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void
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ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan)
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{
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struct ieee80211_node_table *nt;
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struct ieee80211_node *ni;
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN,
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"%s: creating ibss\n", __func__);
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/*
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* Create the station/neighbor table. Note that for adhoc
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* mode we make the initial inactivity timer longer since
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* we create nodes only through discovery and they typically
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* are long-lived associations.
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*/
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nt = &ic->ic_sta;
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IEEE80211_NODE_LOCK(nt);
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if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
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nt->nt_name = "station";
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nt->nt_inact_init = ic->ic_inact_init;
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} else {
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nt->nt_name = "neighbor";
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nt->nt_inact_init = ic->ic_inact_run;
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}
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IEEE80211_NODE_UNLOCK(nt);
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ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr);
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if (ni == NULL) {
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/* XXX recovery? */
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return;
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}
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IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr);
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ni->ni_esslen = ic->ic_des_ssid[0].len;
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memcpy(ni->ni_essid, ic->ic_des_ssid[0].ssid, ni->ni_esslen);
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if (ic->ic_bss != NULL)
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copy_bss(ni, ic->ic_bss);
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ni->ni_intval = ic->ic_bintval;
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if (ic->ic_flags & IEEE80211_F_PRIVACY)
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ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
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if (ic->ic_phytype == IEEE80211_T_FH) {
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ni->ni_fhdwell = 200; /* XXX */
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ni->ni_fhindex = 1;
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}
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if (ic->ic_opmode == IEEE80211_M_IBSS) {
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ic->ic_flags |= IEEE80211_F_SIBSS;
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ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */
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if (ic->ic_flags & IEEE80211_F_DESBSSID)
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IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid);
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else {
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get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN);
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/* clear group bit, add local bit */
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ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02;
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}
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} else if (ic->ic_opmode == IEEE80211_M_AHDEMO) {
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if (ic->ic_flags & IEEE80211_F_DESBSSID)
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IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid);
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else
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memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN);
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}
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/*
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* Fix the channel and related attributes.
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*/
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ic->ic_bsschan = chan;
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ieee80211_node_set_chan(ic, ni);
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ic->ic_curmode = ieee80211_chan2mode(chan);
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/*
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* Do mode-specific rate setup.
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*/
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if (IEEE80211_IS_CHAN_FULL(chan)) {
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if (IEEE80211_IS_CHAN_ANYG(chan)) {
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/*
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* Use a mixed 11b/11g rate set.
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*/
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ieee80211_set11gbasicrates(&ni->ni_rates,
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IEEE80211_MODE_11G);
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} else if (IEEE80211_IS_CHAN_B(chan)) {
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/*
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* Force pure 11b rate set.
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*/
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ieee80211_set11gbasicrates(&ni->ni_rates,
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IEEE80211_MODE_11B);
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}
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}
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(void) ieee80211_sta_join1(ieee80211_ref_node(ni));
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}
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/*
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* Reset bss state on transition to the INIT state.
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* Clear any stations from the table (they have been
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* deauth'd) and reset the bss node (clears key, rate
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* etc. state).
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*/
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void
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ieee80211_reset_bss(struct ieee80211com *ic)
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{
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struct ieee80211_node *ni, *obss;
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callout_drain(&ic->ic_inact);
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ieee80211_node_table_reset(&ic->ic_sta);
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ieee80211_reset_erp(ic);
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ni = ieee80211_alloc_node(&ic->ic_sta, ic->ic_myaddr);
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KASSERT(ni != NULL, ("unable to setup inital BSS node"));
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obss = ic->ic_bss;
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ic->ic_bss = ieee80211_ref_node(ni);
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if (obss != NULL) {
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copy_bss(ni, obss);
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ni->ni_intval = ic->ic_bintval;
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ieee80211_free_node(obss);
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}
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}
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static int
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match_ssid(const struct ieee80211_node *ni,
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int nssid, const struct ieee80211_scan_ssid ssids[])
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{
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int i;
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for (i = 0; i < nssid; i++) {
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if (ni->ni_esslen == ssids[i].len &&
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memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0)
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return 1;
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}
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return 0;
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}
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/*
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* Test a node for suitability/compatibility.
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*/
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static int
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check_bss(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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uint8_t rate;
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if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
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return 0;
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if (ic->ic_opmode == IEEE80211_M_IBSS) {
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if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
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return 0;
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} else {
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if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
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return 0;
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}
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if (ic->ic_flags & IEEE80211_F_PRIVACY) {
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if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
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return 0;
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} else {
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/* XXX does this mean privacy is supported or required? */
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if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
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return 0;
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}
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rate = ieee80211_fix_rate(ni, &ni->ni_rates,
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IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
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if (rate & IEEE80211_RATE_BASIC)
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return 0;
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if (ic->ic_des_nssid != 0 &&
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!match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid))
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return 0;
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if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
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!IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
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return 0;
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return 1;
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}
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#ifdef IEEE80211_DEBUG
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/*
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* Display node suitability/compatibility.
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*/
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static void
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check_bss_debug(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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uint8_t rate;
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int fail;
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fail = 0;
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if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
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fail |= 0x01;
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if (ic->ic_opmode == IEEE80211_M_IBSS) {
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if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
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fail |= 0x02;
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} else {
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if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
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fail |= 0x02;
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}
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if (ic->ic_flags & IEEE80211_F_PRIVACY) {
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
|
|
fail |= 0x04;
|
|
} else {
|
|
/* XXX does this mean privacy is supported or required? */
|
|
if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
|
|
fail |= 0x04;
|
|
}
|
|
rate = ieee80211_fix_rate(ni, &ni->ni_rates,
|
|
IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE);
|
|
if (rate & IEEE80211_RATE_BASIC)
|
|
fail |= 0x08;
|
|
if (ic->ic_des_nssid != 0 &&
|
|
!match_ssid(ni, ic->ic_des_nssid, ic->ic_des_ssid))
|
|
fail |= 0x10;
|
|
if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
|
|
!IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
|
|
fail |= 0x20;
|
|
|
|
printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr));
|
|
printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' ');
|
|
printf(" %3d%c",
|
|
ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' ');
|
|
printf(" %+4d", ni->ni_rssi);
|
|
printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
|
|
fail & 0x08 ? '!' : ' ');
|
|
printf(" %4s%c",
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
|
|
"????",
|
|
fail & 0x02 ? '!' : ' ');
|
|
printf(" %3s%c ",
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no",
|
|
fail & 0x04 ? '!' : ' ');
|
|
ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
|
|
printf("%s\n", fail & 0x10 ? "!" : "");
|
|
}
|
|
#endif /* IEEE80211_DEBUG */
|
|
|
|
/*
|
|
* Handle 802.11 ad hoc network merge. The
|
|
* convention, set by the Wireless Ethernet Compatibility Alliance
|
|
* (WECA), is that an 802.11 station will change its BSSID to match
|
|
* the "oldest" 802.11 ad hoc network, on the same channel, that
|
|
* has the station's desired SSID. The "oldest" 802.11 network
|
|
* sends beacons with the greatest TSF timestamp.
|
|
*
|
|
* The caller is assumed to validate TSF's before attempting a merge.
|
|
*
|
|
* Return !0 if the BSSID changed, 0 otherwise.
|
|
*/
|
|
int
|
|
ieee80211_ibss_merge(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
if (ni == ic->ic_bss ||
|
|
IEEE80211_ADDR_EQ(ni->ni_bssid, ic->ic_bss->ni_bssid)) {
|
|
/* unchanged, nothing to do */
|
|
return 0;
|
|
}
|
|
if (!check_bss(ic, ni)) {
|
|
/* capabilities mismatch */
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
"%s: merge failed, capabilities mismatch\n", __func__);
|
|
#ifdef IEEE80211_DEBUG
|
|
if (ieee80211_msg_assoc(ic))
|
|
check_bss_debug(ic, ni);
|
|
#endif
|
|
ic->ic_stats.is_ibss_capmismatch++;
|
|
return 0;
|
|
}
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
"%s: new bssid %s: %s preamble, %s slot time%s\n", __func__,
|
|
ether_sprintf(ni->ni_bssid),
|
|
ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
|
|
ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
|
|
ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : ""
|
|
);
|
|
return ieee80211_sta_join1(ieee80211_ref_node(ni));
|
|
}
|
|
|
|
/*
|
|
* Change the bss channel.
|
|
*/
|
|
void
|
|
ieee80211_setbsschan(struct ieee80211com *ic, struct ieee80211_channel *c)
|
|
{
|
|
ic->ic_bsschan = c;
|
|
ic->ic_curchan = ic->ic_bsschan;
|
|
ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan);
|
|
ic->ic_set_channel(ic);
|
|
}
|
|
|
|
/*
|
|
* Join the specified IBSS/BSS network. The node is assumed to
|
|
* be passed in with a held reference.
|
|
*/
|
|
static int
|
|
ieee80211_sta_join1(struct ieee80211_node *selbs)
|
|
{
|
|
struct ieee80211com *ic = selbs->ni_ic;
|
|
struct ieee80211_node *obss;
|
|
int canreassoc;
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS) {
|
|
struct ieee80211_node_table *nt;
|
|
/*
|
|
* Fillin the neighbor table; it will already
|
|
* exist if we are simply switching mastership.
|
|
* XXX ic_sta always setup so this is unnecessary?
|
|
*/
|
|
nt = &ic->ic_sta;
|
|
IEEE80211_NODE_LOCK(nt);
|
|
nt->nt_name = "neighbor";
|
|
nt->nt_inact_init = ic->ic_inact_run;
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
}
|
|
|
|
/*
|
|
* Committed to selbs, setup state.
|
|
*/
|
|
obss = ic->ic_bss;
|
|
/*
|
|
* Check if old+new node have the same address in which
|
|
* case we can reassociate when operating in sta mode.
|
|
*/
|
|
canreassoc = (obss != NULL &&
|
|
ic->ic_state == IEEE80211_S_RUN &&
|
|
IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr));
|
|
ic->ic_bss = selbs; /* NB: caller assumed to bump refcnt */
|
|
if (obss != NULL) {
|
|
copy_bss(selbs, obss);
|
|
ieee80211_free_node(obss);
|
|
}
|
|
|
|
/*
|
|
* Delete unusable rates; we've already checked
|
|
* that the negotiated rate set is acceptable.
|
|
*/
|
|
ieee80211_fix_rate(ic->ic_bss, &ic->ic_bss->ni_rates,
|
|
IEEE80211_F_DODEL | IEEE80211_F_JOIN);
|
|
|
|
ieee80211_setbsschan(ic, selbs->ni_chan);
|
|
/*
|
|
* Set the erp state (mostly the slot time) to deal with
|
|
* the auto-select case; this should be redundant if the
|
|
* mode is locked.
|
|
*/
|
|
ieee80211_reset_erp(ic);
|
|
ieee80211_wme_initparams(ic);
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_STA) {
|
|
if (canreassoc) {
|
|
/* Reassociate */
|
|
ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1);
|
|
} else {
|
|
/*
|
|
* Act as if we received a DEAUTH frame in case we
|
|
* are invoked from the RUN state. This will cause
|
|
* us to try to re-authenticate if we are operating
|
|
* as a station.
|
|
*/
|
|
ieee80211_new_state(ic, IEEE80211_S_AUTH,
|
|
IEEE80211_FC0_SUBTYPE_DEAUTH);
|
|
}
|
|
} else
|
|
ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
ieee80211_sta_join(struct ieee80211com *ic,
|
|
const struct ieee80211_scan_entry *se)
|
|
{
|
|
struct ieee80211_node *ni;
|
|
|
|
ni = ieee80211_alloc_node(&ic->ic_sta, se->se_macaddr);
|
|
if (ni == NULL) {
|
|
/* XXX msg */
|
|
return 0;
|
|
}
|
|
/*
|
|
* Expand scan state into node's format.
|
|
* XXX may not need all this stuff
|
|
*/
|
|
IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid);
|
|
ni->ni_esslen = se->se_ssid[1];
|
|
memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen);
|
|
ni->ni_rstamp = se->se_rstamp;
|
|
ni->ni_tstamp.tsf = se->se_tstamp.tsf;
|
|
ni->ni_intval = se->se_intval;
|
|
ni->ni_capinfo = se->se_capinfo;
|
|
ni->ni_chan = se->se_chan;
|
|
ni->ni_timoff = se->se_timoff;
|
|
ni->ni_fhdwell = se->se_fhdwell;
|
|
ni->ni_fhindex = se->se_fhindex;
|
|
ni->ni_erp = se->se_erp;
|
|
ni->ni_rssi = se->se_rssi;
|
|
ni->ni_noise = se->se_noise;
|
|
if (se->se_htcap_ie != NULL) {
|
|
ieee80211_saveie(&ni->ni_htcap_ie, se->se_htcap_ie);
|
|
ieee80211_parse_htcap(ni, ni->ni_htcap_ie);
|
|
}
|
|
if (se->se_wpa_ie != NULL)
|
|
ieee80211_saveie(&ni->ni_wpa_ie, se->se_wpa_ie);
|
|
if (se->se_rsn_ie != NULL)
|
|
ieee80211_saveie(&ni->ni_rsn_ie, se->se_rsn_ie);
|
|
if (se->se_wme_ie != NULL)
|
|
ieee80211_saveie(&ni->ni_wme_ie, se->se_wme_ie);
|
|
if (se->se_ath_ie != NULL)
|
|
ieee80211_saveath(ni, se->se_ath_ie);
|
|
|
|
ic->ic_dtim_period = se->se_dtimperiod;
|
|
ic->ic_dtim_count = 0;
|
|
|
|
/* NB: must be after ni_chan is setup */
|
|
ieee80211_setup_rates(ni, se->se_rates, se->se_xrates,
|
|
IEEE80211_F_DOSORT);
|
|
|
|
return ieee80211_sta_join1(ieee80211_ref_node(ni));
|
|
}
|
|
|
|
/*
|
|
* Leave the specified IBSS/BSS network. The node is assumed to
|
|
* be passed in with a held reference.
|
|
*/
|
|
void
|
|
ieee80211_sta_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
|
|
{
|
|
ic->ic_node_cleanup(ni);
|
|
ieee80211_notify_node_leave(ic, ni);
|
|
}
|
|
|
|
static struct ieee80211_node *
|
|
node_alloc(struct ieee80211_node_table *nt)
|
|
{
|
|
struct ieee80211_node *ni;
|
|
|
|
MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node),
|
|
M_80211_NODE, M_NOWAIT | M_ZERO);
|
|
return ni;
|
|
}
|
|
|
|
/*
|
|
* Reclaim any resources in a node and reset any critical
|
|
* state. Typically nodes are free'd immediately after,
|
|
* but in some cases the storage may be reused so we need
|
|
* to insure consistent state (should probably fix that).
|
|
*/
|
|
static void
|
|
node_cleanup(struct ieee80211_node *ni)
|
|
{
|
|
#define N(a) (sizeof(a)/sizeof(a[0]))
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
int i;
|
|
|
|
/* NB: preserve ni_table */
|
|
if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) {
|
|
if (ic->ic_opmode != IEEE80211_M_STA)
|
|
ic->ic_ps_sta--;
|
|
ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT;
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
|
|
"[%s] power save mode off, %u sta's in ps mode\n",
|
|
ether_sprintf(ni->ni_macaddr), ic->ic_ps_sta);
|
|
}
|
|
/*
|
|
* Cleanup any HT-related state.
|
|
*/
|
|
if (ni->ni_flags & IEEE80211_NODE_HT)
|
|
ieee80211_ht_node_cleanup(ni);
|
|
/*
|
|
* Clear AREF flag that marks the authorization refcnt bump
|
|
* has happened. This is probably not needed as the node
|
|
* should always be removed from the table so not found but
|
|
* do it just in case.
|
|
*/
|
|
ni->ni_flags &= ~IEEE80211_NODE_AREF;
|
|
|
|
/*
|
|
* Drain power save queue and, if needed, clear TIM.
|
|
*/
|
|
if (ieee80211_node_saveq_drain(ni) != 0 && ic->ic_set_tim != NULL)
|
|
ic->ic_set_tim(ni, 0);
|
|
|
|
ni->ni_associd = 0;
|
|
if (ni->ni_challenge != NULL) {
|
|
FREE(ni->ni_challenge, M_80211_NODE);
|
|
ni->ni_challenge = NULL;
|
|
}
|
|
/*
|
|
* Preserve SSID, WPA, and WME ie's so the bss node is
|
|
* reusable during a re-auth/re-assoc state transition.
|
|
* If we remove these data they will not be recreated
|
|
* because they come from a probe-response or beacon frame
|
|
* which cannot be expected prior to the association-response.
|
|
* This should not be an issue when operating in other modes
|
|
* as stations leaving always go through a full state transition
|
|
* which will rebuild this state.
|
|
*
|
|
* XXX does this leave us open to inheriting old state?
|
|
*/
|
|
for (i = 0; i < N(ni->ni_rxfrag); i++)
|
|
if (ni->ni_rxfrag[i] != NULL) {
|
|
m_freem(ni->ni_rxfrag[i]);
|
|
ni->ni_rxfrag[i] = NULL;
|
|
}
|
|
/*
|
|
* Must be careful here to remove any key map entry w/o a LOR.
|
|
*/
|
|
ieee80211_node_delucastkey(ni);
|
|
#undef N
|
|
}
|
|
|
|
static void
|
|
node_free(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
ic->ic_node_cleanup(ni);
|
|
if (ni->ni_wpa_ie != NULL)
|
|
FREE(ni->ni_wpa_ie, M_80211_NODE);
|
|
if (ni->ni_rsn_ie != NULL)
|
|
FREE(ni->ni_rsn_ie, M_80211_NODE);
|
|
if (ni->ni_wme_ie != NULL)
|
|
FREE(ni->ni_wme_ie, M_80211_NODE);
|
|
if (ni->ni_ath_ie != NULL)
|
|
FREE(ni->ni_ath_ie, M_80211_NODE);
|
|
IEEE80211_NODE_SAVEQ_DESTROY(ni);
|
|
FREE(ni, M_80211_NODE);
|
|
}
|
|
|
|
static int8_t
|
|
node_getrssi(const struct ieee80211_node *ni)
|
|
{
|
|
return ni->ni_rssi;
|
|
}
|
|
|
|
static void
|
|
node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise)
|
|
{
|
|
*rssi = ni->ni_rssi;
|
|
*noise = ni->ni_noise;
|
|
}
|
|
|
|
static void
|
|
ieee80211_setup_node(struct ieee80211_node_table *nt,
|
|
struct ieee80211_node *ni, const uint8_t *macaddr)
|
|
{
|
|
struct ieee80211com *ic = nt->nt_ic;
|
|
int hash;
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
"%s %p<%s> in %s table\n", __func__, ni,
|
|
ether_sprintf(macaddr), nt->nt_name);
|
|
|
|
IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
|
|
hash = IEEE80211_NODE_HASH(macaddr);
|
|
ieee80211_node_initref(ni); /* mark referenced */
|
|
ni->ni_chan = IEEE80211_CHAN_ANYC;
|
|
ni->ni_authmode = IEEE80211_AUTH_OPEN;
|
|
ni->ni_txpower = ic->ic_txpowlimit; /* max power */
|
|
ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE);
|
|
ni->ni_inact_reload = nt->nt_inact_init;
|
|
ni->ni_inact = ni->ni_inact_reload;
|
|
ni->ni_ath_defkeyix = 0x7fff;
|
|
IEEE80211_NODE_SAVEQ_INIT(ni, "unknown");
|
|
|
|
IEEE80211_NODE_LOCK(nt);
|
|
TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list);
|
|
LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash);
|
|
ni->ni_table = nt;
|
|
ni->ni_ic = ic;
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
}
|
|
|
|
struct ieee80211_node *
|
|
ieee80211_alloc_node(struct ieee80211_node_table *nt, const uint8_t *macaddr)
|
|
{
|
|
struct ieee80211com *ic = nt->nt_ic;
|
|
struct ieee80211_node *ni;
|
|
|
|
ni = ic->ic_node_alloc(nt);
|
|
if (ni != NULL)
|
|
ieee80211_setup_node(nt, ni, macaddr);
|
|
else
|
|
ic->ic_stats.is_rx_nodealloc++;
|
|
return ni;
|
|
}
|
|
|
|
/*
|
|
* Craft a temporary node suitable for sending a management frame
|
|
* to the specified station. We craft only as much state as we
|
|
* need to do the work since the node will be immediately reclaimed
|
|
* once the send completes.
|
|
*/
|
|
struct ieee80211_node *
|
|
ieee80211_tmp_node(struct ieee80211com *ic, const uint8_t *macaddr)
|
|
{
|
|
struct ieee80211_node *ni;
|
|
|
|
ni = ic->ic_node_alloc(&ic->ic_sta);
|
|
if (ni != NULL) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
"%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr));
|
|
|
|
IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
|
|
IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
|
|
ieee80211_node_initref(ni); /* mark referenced */
|
|
ni->ni_txpower = ic->ic_bss->ni_txpower;
|
|
/* NB: required by ieee80211_fix_rate */
|
|
ieee80211_node_set_chan(ic, ni);
|
|
ieee80211_crypto_resetkey(ic, &ni->ni_ucastkey,
|
|
IEEE80211_KEYIX_NONE);
|
|
/* XXX optimize away */
|
|
IEEE80211_NODE_SAVEQ_INIT(ni, "unknown");
|
|
|
|
ni->ni_table = NULL; /* NB: pedantic */
|
|
ni->ni_ic = ic;
|
|
} else {
|
|
/* XXX msg */
|
|
ic->ic_stats.is_rx_nodealloc++;
|
|
}
|
|
return ni;
|
|
}
|
|
|
|
struct ieee80211_node *
|
|
ieee80211_dup_bss(struct ieee80211_node_table *nt, const uint8_t *macaddr)
|
|
{
|
|
struct ieee80211com *ic = nt->nt_ic;
|
|
struct ieee80211_node *ni;
|
|
|
|
ni = ic->ic_node_alloc(nt);
|
|
if (ni != NULL) {
|
|
ieee80211_setup_node(nt, ni, macaddr);
|
|
/*
|
|
* Inherit from ic_bss.
|
|
*/
|
|
ni->ni_authmode = ic->ic_bss->ni_authmode;
|
|
ni->ni_txpower = ic->ic_bss->ni_txpower;
|
|
ni->ni_vlan = ic->ic_bss->ni_vlan; /* XXX?? */
|
|
IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid);
|
|
ieee80211_node_set_chan(ic, ni);
|
|
ni->ni_rsn = ic->ic_bss->ni_rsn;
|
|
} else
|
|
ic->ic_stats.is_rx_nodealloc++;
|
|
return ni;
|
|
}
|
|
|
|
static struct ieee80211_node *
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
_ieee80211_find_node_debug(struct ieee80211_node_table *nt,
|
|
const uint8_t *macaddr, const char *func, int line)
|
|
#else
|
|
_ieee80211_find_node(struct ieee80211_node_table *nt,
|
|
const uint8_t *macaddr)
|
|
#endif
|
|
{
|
|
struct ieee80211_node *ni;
|
|
int hash;
|
|
|
|
IEEE80211_NODE_LOCK_ASSERT(nt);
|
|
|
|
hash = IEEE80211_NODE_HASH(macaddr);
|
|
LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
|
|
if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
|
|
ieee80211_ref_node(ni); /* mark referenced */
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
|
|
"%s (%s:%u) %p<%s> refcnt %d\n", __func__,
|
|
func, line,
|
|
ni, ether_sprintf(ni->ni_macaddr),
|
|
ieee80211_node_refcnt(ni));
|
|
#endif
|
|
return ni;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
#define _ieee80211_find_node(nt, mac) \
|
|
_ieee80211_find_node_debug(nt, mac, func, line)
|
|
#endif
|
|
|
|
struct ieee80211_node *
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
ieee80211_find_node_debug(struct ieee80211_node_table *nt,
|
|
const uint8_t *macaddr, const char *func, int line)
|
|
#else
|
|
ieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t *macaddr)
|
|
#endif
|
|
{
|
|
struct ieee80211_node *ni;
|
|
|
|
IEEE80211_NODE_LOCK(nt);
|
|
ni = _ieee80211_find_node(nt, macaddr);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
return ni;
|
|
}
|
|
|
|
/*
|
|
* Fake up a node; this handles node discovery in adhoc mode.
|
|
* Note that for the driver's benefit we we treat this like
|
|
* an association so the driver has an opportunity to setup
|
|
* it's private state.
|
|
*/
|
|
struct ieee80211_node *
|
|
ieee80211_fakeup_adhoc_node(struct ieee80211_node_table *nt,
|
|
const uint8_t macaddr[IEEE80211_ADDR_LEN])
|
|
{
|
|
struct ieee80211com *ic = nt->nt_ic;
|
|
struct ieee80211_node *ni;
|
|
|
|
IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
|
|
"%s: mac<%s>\n", __func__, ether_sprintf(macaddr));
|
|
ni = ieee80211_dup_bss(nt, macaddr);
|
|
if (ni != NULL) {
|
|
/* XXX no rate negotiation; just dup */
|
|
ni->ni_rates = ic->ic_bss->ni_rates;
|
|
if (ic->ic_newassoc != NULL)
|
|
ic->ic_newassoc(ni, 1);
|
|
if (ic->ic_opmode == IEEE80211_M_AHDEMO) {
|
|
/*
|
|
* In adhoc demo mode there are no management
|
|
* frames to use to discover neighbor capabilities,
|
|
* so blindly propagate the local configuration
|
|
* so we can do interesting things (e.g. use
|
|
* WME to disable ACK's).
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_WME)
|
|
ni->ni_flags |= IEEE80211_NODE_QOS;
|
|
if (ic->ic_flags & IEEE80211_F_FF)
|
|
ni->ni_flags |= IEEE80211_NODE_FF;
|
|
}
|
|
/* XXX not right for 802.1x/WPA */
|
|
ieee80211_node_authorize(ni);
|
|
}
|
|
return ni;
|
|
}
|
|
|
|
void
|
|
ieee80211_init_neighbor(struct ieee80211_node *ni,
|
|
const struct ieee80211_frame *wh,
|
|
const struct ieee80211_scanparams *sp)
|
|
{
|
|
ni->ni_esslen = sp->ssid[1];
|
|
memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]);
|
|
IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3);
|
|
memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp));
|
|
ni->ni_intval = sp->bintval;
|
|
ni->ni_capinfo = sp->capinfo;
|
|
ni->ni_chan = ni->ni_ic->ic_curchan;
|
|
ni->ni_fhdwell = sp->fhdwell;
|
|
ni->ni_fhindex = sp->fhindex;
|
|
ni->ni_erp = sp->erp;
|
|
ni->ni_timoff = sp->timoff;
|
|
if (sp->wme != NULL)
|
|
ieee80211_saveie(&ni->ni_wme_ie, sp->wme);
|
|
if (sp->wpa != NULL)
|
|
ieee80211_saveie(&ni->ni_wpa_ie, sp->wpa);
|
|
if (sp->rsn != NULL)
|
|
ieee80211_saveie(&ni->ni_rsn_ie, sp->rsn);
|
|
if (sp->ath != NULL)
|
|
ieee80211_saveath(ni, sp->ath);
|
|
|
|
/* NB: must be after ni_chan is setup */
|
|
ieee80211_setup_rates(ni, sp->rates, sp->xrates,
|
|
IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
|
|
IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
|
|
}
|
|
|
|
/*
|
|
* Do node discovery in adhoc mode on receipt of a beacon
|
|
* or probe response frame. Note that for the driver's
|
|
* benefit we we treat this like an association so the
|
|
* driver has an opportunity to setup it's private state.
|
|
*/
|
|
struct ieee80211_node *
|
|
ieee80211_add_neighbor(struct ieee80211com *ic,
|
|
const struct ieee80211_frame *wh,
|
|
const struct ieee80211_scanparams *sp)
|
|
{
|
|
struct ieee80211_node *ni;
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
"%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2));
|
|
ni = ieee80211_dup_bss(&ic->ic_sta, wh->i_addr2);/* XXX alloc_node? */
|
|
if (ni != NULL) {
|
|
ieee80211_init_neighbor(ni, wh, sp);
|
|
if (ic->ic_newassoc != NULL)
|
|
ic->ic_newassoc(ni, 1);
|
|
/* XXX not right for 802.1x/WPA */
|
|
ieee80211_node_authorize(ni);
|
|
}
|
|
return ni;
|
|
}
|
|
|
|
#define IS_CTL(wh) \
|
|
((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
|
|
#define IS_PSPOLL(wh) \
|
|
((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
|
|
#define IS_BAR(wh) \
|
|
((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_BAR)
|
|
|
|
/*
|
|
* Locate the node for sender, track state, and then pass the
|
|
* (referenced) node up to the 802.11 layer for its use. We
|
|
* are required to pass some node so we fall back to ic_bss
|
|
* when this frame is from an unknown sender. The 802.11 layer
|
|
* knows this means the sender wasn't in the node table and
|
|
* acts accordingly.
|
|
*/
|
|
struct ieee80211_node *
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
ieee80211_find_rxnode_debug(struct ieee80211com *ic,
|
|
const struct ieee80211_frame_min *wh, const char *func, int line)
|
|
#else
|
|
ieee80211_find_rxnode(struct ieee80211com *ic,
|
|
const struct ieee80211_frame_min *wh)
|
|
#endif
|
|
{
|
|
struct ieee80211_node_table *nt;
|
|
struct ieee80211_node *ni;
|
|
|
|
/* XXX check ic_bss first in station mode */
|
|
/* XXX 4-address frames? */
|
|
nt = &ic->ic_sta;
|
|
IEEE80211_NODE_LOCK(nt);
|
|
if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/)
|
|
ni = _ieee80211_find_node(nt, wh->i_addr1);
|
|
else
|
|
ni = _ieee80211_find_node(nt, wh->i_addr2);
|
|
if (ni == NULL)
|
|
ni = ieee80211_ref_node(ic->ic_bss);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
|
|
return ni;
|
|
}
|
|
|
|
/*
|
|
* Like ieee80211_find_rxnode but use the supplied h/w
|
|
* key index as a hint to locate the node in the key
|
|
* mapping table. If an entry is present at the key
|
|
* index we return it; otherwise do a normal lookup and
|
|
* update the mapping table if the station has a unicast
|
|
* key assigned to it.
|
|
*/
|
|
struct ieee80211_node *
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic,
|
|
const struct ieee80211_frame_min *wh, ieee80211_keyix keyix,
|
|
const char *func, int line)
|
|
#else
|
|
ieee80211_find_rxnode_withkey(struct ieee80211com *ic,
|
|
const struct ieee80211_frame_min *wh, ieee80211_keyix keyix)
|
|
#endif
|
|
{
|
|
struct ieee80211_node_table *nt;
|
|
struct ieee80211_node *ni;
|
|
|
|
nt = &ic->ic_sta;
|
|
IEEE80211_NODE_LOCK(nt);
|
|
if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax)
|
|
ni = nt->nt_keyixmap[keyix];
|
|
else
|
|
ni = NULL;
|
|
if (ni == NULL) {
|
|
if (IS_CTL(wh) && !IS_PSPOLL(wh) && !IS_BAR(wh) /*&& !IS_RTS(ah)*/)
|
|
ni = _ieee80211_find_node(nt, wh->i_addr1);
|
|
else
|
|
ni = _ieee80211_find_node(nt, wh->i_addr2);
|
|
if (ni == NULL)
|
|
ni = ieee80211_ref_node(ic->ic_bss);
|
|
if (nt->nt_keyixmap != NULL) {
|
|
/*
|
|
* If the station has a unicast key cache slot
|
|
* assigned update the key->node mapping table.
|
|
*/
|
|
keyix = ni->ni_ucastkey.wk_rxkeyix;
|
|
/* XXX can keyixmap[keyix] != NULL? */
|
|
if (keyix < nt->nt_keyixmax &&
|
|
nt->nt_keyixmap[keyix] == NULL) {
|
|
IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
|
|
"%s: add key map entry %p<%s> refcnt %d\n",
|
|
__func__, ni, ether_sprintf(ni->ni_macaddr),
|
|
ieee80211_node_refcnt(ni)+1);
|
|
nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni);
|
|
}
|
|
}
|
|
} else
|
|
ieee80211_ref_node(ni);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
|
|
return ni;
|
|
}
|
|
#undef IS_BAR
|
|
#undef IS_PSPOLL
|
|
#undef IS_CTL
|
|
|
|
/*
|
|
* Return a reference to the appropriate node for sending
|
|
* a data frame. This handles node discovery in adhoc networks.
|
|
*/
|
|
struct ieee80211_node *
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
ieee80211_find_txnode_debug(struct ieee80211com *ic, const uint8_t *macaddr,
|
|
const char *func, int line)
|
|
#else
|
|
ieee80211_find_txnode(struct ieee80211com *ic, const uint8_t *macaddr)
|
|
#endif
|
|
{
|
|
struct ieee80211_node_table *nt = &ic->ic_sta;
|
|
struct ieee80211_node *ni;
|
|
|
|
/*
|
|
* The destination address should be in the node table
|
|
* unless this is a multicast/broadcast frame. We can
|
|
* also optimize station mode operation, all frames go
|
|
* to the bss node.
|
|
*/
|
|
/* XXX can't hold lock across dup_bss 'cuz of recursive locking */
|
|
IEEE80211_NODE_LOCK(nt);
|
|
if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr))
|
|
ni = ieee80211_ref_node(ic->ic_bss);
|
|
else {
|
|
ni = _ieee80211_find_node(nt, macaddr);
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
|
|
(ni != NULL && ni->ni_associd == 0)) {
|
|
/*
|
|
* Station is not associated; don't permit the
|
|
* data frame to be sent by returning NULL. This
|
|
* is kinda a kludge but the least intrusive way
|
|
* to add this check into all drivers.
|
|
*/
|
|
ieee80211_unref_node(&ni); /* NB: null's ni */
|
|
}
|
|
}
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
|
|
if (ni == NULL) {
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS ||
|
|
ic->ic_opmode == IEEE80211_M_AHDEMO) {
|
|
/*
|
|
* In adhoc mode cons up a node for the destination.
|
|
* Note that we need an additional reference for the
|
|
* caller to be consistent with _ieee80211_find_node.
|
|
*/
|
|
ni = ieee80211_fakeup_adhoc_node(nt, macaddr);
|
|
if (ni != NULL)
|
|
(void) ieee80211_ref_node(ni);
|
|
} else {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
|
|
"[%s] no node, discard frame (%s)\n",
|
|
ether_sprintf(macaddr), __func__);
|
|
ic->ic_stats.is_tx_nonode++;
|
|
}
|
|
}
|
|
return ni;
|
|
}
|
|
|
|
/*
|
|
* Like find but search based on the ssid too.
|
|
*/
|
|
struct ieee80211_node *
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
ieee80211_find_node_with_ssid_debug(struct ieee80211_node_table *nt,
|
|
const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid,
|
|
const char *func, int line)
|
|
#else
|
|
ieee80211_find_node_with_ssid(struct ieee80211_node_table *nt,
|
|
const uint8_t *macaddr, u_int ssidlen, const uint8_t *ssid)
|
|
#endif
|
|
{
|
|
#define MATCH_SSID(ni, ssid, ssidlen) \
|
|
(ni->ni_esslen == ssidlen && memcmp(ni->ni_essid, ssid, ssidlen) == 0)
|
|
static const uint8_t zeromac[IEEE80211_ADDR_LEN];
|
|
struct ieee80211_node *ni;
|
|
int hash;
|
|
|
|
IEEE80211_NODE_LOCK(nt);
|
|
/*
|
|
* A mac address that is all zero means match only the ssid;
|
|
* otherwise we must match both.
|
|
*/
|
|
if (IEEE80211_ADDR_EQ(macaddr, zeromac)) {
|
|
TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
|
|
if (MATCH_SSID(ni, ssid, ssidlen))
|
|
break;
|
|
}
|
|
} else {
|
|
hash = IEEE80211_NODE_HASH(macaddr);
|
|
LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) {
|
|
if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) &&
|
|
MATCH_SSID(ni, ssid, ssidlen))
|
|
break;
|
|
}
|
|
}
|
|
if (ni != NULL) {
|
|
ieee80211_ref_node(ni); /* mark referenced */
|
|
IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
|
|
REFCNT_LOC, ni, ether_sprintf(ni->ni_macaddr),
|
|
ieee80211_node_refcnt(ni));
|
|
}
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
return ni;
|
|
#undef MATCH_SSID
|
|
}
|
|
|
|
static void
|
|
_ieee80211_free_node(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_node_table *nt = ni->ni_table;
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
"%s %p<%s> in %s table\n", __func__, ni,
|
|
ether_sprintf(ni->ni_macaddr),
|
|
nt != NULL ? nt->nt_name : "<gone>");
|
|
|
|
IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
|
|
if (nt != NULL) {
|
|
TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
|
|
LIST_REMOVE(ni, ni_hash);
|
|
}
|
|
ic->ic_node_free(ni);
|
|
}
|
|
|
|
void
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line)
|
|
#else
|
|
ieee80211_free_node(struct ieee80211_node *ni)
|
|
#endif
|
|
{
|
|
struct ieee80211_node_table *nt = ni->ni_table;
|
|
|
|
#ifdef IEEE80211_DEBUG_REFCNT
|
|
IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
|
|
"%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni,
|
|
ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1);
|
|
#endif
|
|
if (nt != NULL) {
|
|
IEEE80211_NODE_LOCK(nt);
|
|
if (ieee80211_node_dectestref(ni)) {
|
|
/*
|
|
* Last reference, reclaim state.
|
|
*/
|
|
_ieee80211_free_node(ni);
|
|
} else if (ieee80211_node_refcnt(ni) == 1 &&
|
|
nt->nt_keyixmap != NULL) {
|
|
ieee80211_keyix keyix;
|
|
/*
|
|
* Check for a last reference in the key mapping table.
|
|
*/
|
|
keyix = ni->ni_ucastkey.wk_rxkeyix;
|
|
if (keyix < nt->nt_keyixmax &&
|
|
nt->nt_keyixmap[keyix] == ni) {
|
|
IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
|
|
"%s: %p<%s> clear key map entry", __func__,
|
|
ni, ether_sprintf(ni->ni_macaddr));
|
|
nt->nt_keyixmap[keyix] = NULL;
|
|
ieee80211_node_decref(ni); /* XXX needed? */
|
|
_ieee80211_free_node(ni);
|
|
}
|
|
}
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
} else {
|
|
if (ieee80211_node_dectestref(ni))
|
|
_ieee80211_free_node(ni);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Reclaim a unicast key and clear any key cache state.
|
|
*/
|
|
int
|
|
ieee80211_node_delucastkey(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_node_table *nt = &ic->ic_sta;
|
|
struct ieee80211_node *nikey;
|
|
ieee80211_keyix keyix;
|
|
int isowned, status;
|
|
|
|
/*
|
|
* NB: We must beware of LOR here; deleting the key
|
|
* can cause the crypto layer to block traffic updates
|
|
* which can generate a LOR against the node table lock;
|
|
* grab it here and stash the key index for our use below.
|
|
*
|
|
* Must also beware of recursion on the node table lock.
|
|
* When called from node_cleanup we may already have
|
|
* the node table lock held. Unfortunately there's no
|
|
* way to separate out this path so we must do this
|
|
* conditionally.
|
|
*/
|
|
isowned = IEEE80211_NODE_IS_LOCKED(nt);
|
|
if (!isowned)
|
|
IEEE80211_NODE_LOCK(nt);
|
|
keyix = ni->ni_ucastkey.wk_rxkeyix;
|
|
status = ieee80211_crypto_delkey(ic, &ni->ni_ucastkey);
|
|
if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) {
|
|
nikey = nt->nt_keyixmap[keyix];
|
|
nt->nt_keyixmap[keyix] = NULL;;
|
|
} else
|
|
nikey = NULL;
|
|
if (!isowned)
|
|
IEEE80211_NODE_UNLOCK(&ic->ic_sta);
|
|
|
|
if (nikey != NULL) {
|
|
KASSERT(nikey == ni,
|
|
("key map out of sync, ni %p nikey %p", ni, nikey));
|
|
IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
|
|
"%s: delete key map entry %p<%s> refcnt %d\n",
|
|
__func__, ni, ether_sprintf(ni->ni_macaddr),
|
|
ieee80211_node_refcnt(ni)-1);
|
|
ieee80211_free_node(ni);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Reclaim a node. If this is the last reference count then
|
|
* do the normal free work. Otherwise remove it from the node
|
|
* table and mark it gone by clearing the back-reference.
|
|
*/
|
|
static void
|
|
node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
|
|
{
|
|
ieee80211_keyix keyix;
|
|
|
|
IEEE80211_NODE_LOCK_ASSERT(nt);
|
|
|
|
IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
|
|
"%s: remove %p<%s> from %s table, refcnt %d\n",
|
|
__func__, ni, ether_sprintf(ni->ni_macaddr),
|
|
nt->nt_name, ieee80211_node_refcnt(ni)-1);
|
|
/*
|
|
* Clear any entry in the unicast key mapping table.
|
|
* We need to do it here so rx lookups don't find it
|
|
* in the mapping table even if it's not in the hash
|
|
* table. We cannot depend on the mapping table entry
|
|
* being cleared because the node may not be free'd.
|
|
*/
|
|
keyix = ni->ni_ucastkey.wk_rxkeyix;
|
|
if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax &&
|
|
nt->nt_keyixmap[keyix] == ni) {
|
|
IEEE80211_DPRINTF(ni->ni_ic, IEEE80211_MSG_NODE,
|
|
"%s: %p<%s> clear key map entry\n",
|
|
__func__, ni, ether_sprintf(ni->ni_macaddr));
|
|
nt->nt_keyixmap[keyix] = NULL;
|
|
ieee80211_node_decref(ni); /* NB: don't need free */
|
|
}
|
|
if (!ieee80211_node_dectestref(ni)) {
|
|
/*
|
|
* Other references are present, just remove the
|
|
* node from the table so it cannot be found. When
|
|
* the references are dropped storage will be
|
|
* reclaimed.
|
|
*/
|
|
TAILQ_REMOVE(&nt->nt_node, ni, ni_list);
|
|
LIST_REMOVE(ni, ni_hash);
|
|
ni->ni_table = NULL; /* clear reference */
|
|
} else
|
|
_ieee80211_free_node(ni);
|
|
}
|
|
|
|
static void
|
|
ieee80211_free_allnodes_locked(struct ieee80211_node_table *nt)
|
|
{
|
|
struct ieee80211com *ic = nt->nt_ic;
|
|
struct ieee80211_node *ni;
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
"%s: free all nodes in %s table\n", __func__, nt->nt_name);
|
|
|
|
while ((ni = TAILQ_FIRST(&nt->nt_node)) != NULL) {
|
|
if (ni->ni_associd != 0) {
|
|
if (ic->ic_auth->ia_node_leave != NULL)
|
|
ic->ic_auth->ia_node_leave(ic, ni);
|
|
IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
|
|
}
|
|
node_reclaim(nt, ni);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Timeout inactive stations and do related housekeeping.
|
|
* Note that we cannot hold the node lock while sending a
|
|
* frame as this would lead to a LOR. Instead we use a
|
|
* generation number to mark nodes that we've scanned and
|
|
* drop the lock and restart a scan if we have to time out
|
|
* a node. Since we are single-threaded by virtue of
|
|
* controlling the inactivity timer we can be sure this will
|
|
* process each node only once.
|
|
*/
|
|
static void
|
|
ieee80211_timeout_stations(struct ieee80211_node_table *nt)
|
|
{
|
|
struct ieee80211com *ic = nt->nt_ic;
|
|
struct ieee80211_node *ni;
|
|
u_int gen;
|
|
int isadhoc;
|
|
|
|
isadhoc = (ic->ic_opmode == IEEE80211_M_IBSS ||
|
|
ic->ic_opmode == IEEE80211_M_AHDEMO);
|
|
IEEE80211_SCAN_LOCK(nt);
|
|
gen = ++nt->nt_scangen;
|
|
restart:
|
|
IEEE80211_NODE_LOCK(nt);
|
|
TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
|
|
if (ni->ni_scangen == gen) /* previously handled */
|
|
continue;
|
|
ni->ni_scangen = gen;
|
|
/*
|
|
* Ignore entries for which have yet to receive an
|
|
* authentication frame. These are transient and
|
|
* will be reclaimed when the last reference to them
|
|
* goes away (when frame xmits complete).
|
|
*/
|
|
if ((ic->ic_opmode == IEEE80211_M_HOSTAP ||
|
|
ic->ic_opmode == IEEE80211_M_STA) &&
|
|
(ni->ni_flags & IEEE80211_NODE_AREF) == 0)
|
|
continue;
|
|
/*
|
|
* Free fragment if not needed anymore
|
|
* (last fragment older than 1s).
|
|
* XXX doesn't belong here
|
|
*/
|
|
if (ni->ni_rxfrag[0] != NULL &&
|
|
ticks > ni->ni_rxfragstamp + hz) {
|
|
m_freem(ni->ni_rxfrag[0]);
|
|
ni->ni_rxfrag[0] = NULL;
|
|
}
|
|
if (ni->ni_inact > 0)
|
|
ni->ni_inact--;
|
|
/*
|
|
* Special case ourself; we may be idle for extended periods
|
|
* of time and regardless reclaiming our state is wrong.
|
|
*/
|
|
if (ni == ic->ic_bss)
|
|
continue;
|
|
if (ni->ni_associd != 0 || isadhoc) {
|
|
/*
|
|
* Age frames on the power save queue.
|
|
*/
|
|
if (ieee80211_node_saveq_age(ni) != 0 &&
|
|
IEEE80211_NODE_SAVEQ_QLEN(ni) == 0 &&
|
|
ic->ic_set_tim != NULL)
|
|
ic->ic_set_tim(ni, 0);
|
|
/*
|
|
* Probe the station before time it out. We
|
|
* send a null data frame which may not be
|
|
* universally supported by drivers (need it
|
|
* for ps-poll support so it should be...).
|
|
*
|
|
* XXX don't probe the station unless we've
|
|
* received a frame from them (and have
|
|
* some idea of the rates they are capable
|
|
* of); this will get fixed more properly
|
|
* soon with better handling of the rate set.
|
|
*/
|
|
if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) &&
|
|
(0 < ni->ni_inact &&
|
|
ni->ni_inact <= ic->ic_inact_probe) &&
|
|
ni->ni_rates.rs_nrates != 0) {
|
|
IEEE80211_NOTE(ic,
|
|
IEEE80211_MSG_INACT | IEEE80211_MSG_NODE,
|
|
ni, "%s",
|
|
"probe station due to inactivity");
|
|
/*
|
|
* Grab a reference before unlocking the table
|
|
* so the node cannot be reclaimed before we
|
|
* send the frame. ieee80211_send_nulldata
|
|
* understands we've done this and reclaims the
|
|
* ref for us as needed.
|
|
*/
|
|
ieee80211_ref_node(ni);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
ieee80211_send_nulldata(ni);
|
|
/* XXX stat? */
|
|
goto restart;
|
|
}
|
|
}
|
|
if ((ic->ic_flags_ext & IEEE80211_FEXT_INACT) &&
|
|
ni->ni_inact <= 0) {
|
|
IEEE80211_NOTE(ic,
|
|
IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni,
|
|
"station timed out due to inactivity "
|
|
"(refcnt %u)", ieee80211_node_refcnt(ni));
|
|
/*
|
|
* Send a deauthenticate frame and drop the station.
|
|
* This is somewhat complicated due to reference counts
|
|
* and locking. At this point a station will typically
|
|
* have a reference count of 1. ieee80211_node_leave
|
|
* will do a "free" of the node which will drop the
|
|
* reference count. But in the meantime a reference
|
|
* wil be held by the deauth frame. The actual reclaim
|
|
* of the node will happen either after the tx is
|
|
* completed or by ieee80211_node_leave.
|
|
*
|
|
* Separately we must drop the node lock before sending
|
|
* in case the driver takes a lock, as this can result
|
|
* in a LOR between the node lock and the driver lock.
|
|
*/
|
|
ieee80211_ref_node(ni);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
if (ni->ni_associd != 0) {
|
|
IEEE80211_SEND_MGMT(ic, ni,
|
|
IEEE80211_FC0_SUBTYPE_DEAUTH,
|
|
IEEE80211_REASON_AUTH_EXPIRE);
|
|
}
|
|
ieee80211_node_leave(ic, ni);
|
|
ieee80211_free_node(ni);
|
|
ic->ic_stats.is_node_timeout++;
|
|
goto restart;
|
|
}
|
|
}
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
|
|
IEEE80211_SCAN_UNLOCK(nt);
|
|
}
|
|
|
|
void
|
|
ieee80211_node_timeout(void *arg)
|
|
{
|
|
struct ieee80211com *ic = arg;
|
|
|
|
ieee80211_scan_timeout(ic);
|
|
ieee80211_timeout_stations(&ic->ic_sta);
|
|
|
|
IEEE80211_LOCK(ic);
|
|
ieee80211_erp_timeout(ic);
|
|
ieee80211_ht_timeout(ic);
|
|
IEEE80211_UNLOCK(ic);
|
|
|
|
callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz,
|
|
ieee80211_node_timeout, ic);
|
|
}
|
|
|
|
void
|
|
ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg)
|
|
{
|
|
struct ieee80211_node *ni;
|
|
u_int gen;
|
|
|
|
IEEE80211_SCAN_LOCK(nt);
|
|
gen = ++nt->nt_scangen;
|
|
restart:
|
|
IEEE80211_NODE_LOCK(nt);
|
|
TAILQ_FOREACH(ni, &nt->nt_node, ni_list) {
|
|
if (ni->ni_scangen != gen) {
|
|
ni->ni_scangen = gen;
|
|
(void) ieee80211_ref_node(ni);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
(*f)(arg, ni);
|
|
ieee80211_free_node(ni);
|
|
goto restart;
|
|
}
|
|
}
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
|
|
IEEE80211_SCAN_UNLOCK(nt);
|
|
}
|
|
|
|
void
|
|
ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni)
|
|
{
|
|
printf("0x%p: mac %s refcnt %d\n", ni,
|
|
ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni));
|
|
printf("\tscangen %u authmode %u flags 0x%x\n",
|
|
ni->ni_scangen, ni->ni_authmode, ni->ni_flags);
|
|
printf("\tassocid 0x%x txpower %u vlan %u\n",
|
|
ni->ni_associd, ni->ni_txpower, ni->ni_vlan);
|
|
printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n",
|
|
ni->ni_txseqs[IEEE80211_NONQOS_TID],
|
|
ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT,
|
|
ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK,
|
|
ni->ni_rxfragstamp);
|
|
printf("\trstamp %u rssi %d noise %d intval %u capinfo 0x%x\n",
|
|
ni->ni_rstamp, ni->ni_rssi, ni->ni_noise,
|
|
ni->ni_intval, ni->ni_capinfo);
|
|
printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n",
|
|
ether_sprintf(ni->ni_bssid),
|
|
ni->ni_esslen, ni->ni_essid,
|
|
ni->ni_chan->ic_freq, ni->ni_chan->ic_flags);
|
|
printf("\tfails %u inact %u txrate %u\n",
|
|
ni->ni_fails, ni->ni_inact, ni->ni_txrate);
|
|
printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n",
|
|
ni->ni_htcap, ni->ni_htparam,
|
|
ni->ni_htctlchan, ni->ni_ht2ndchan);
|
|
printf("\thtopmode %x htstbc %x chw %u\n",
|
|
ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw);
|
|
}
|
|
|
|
void
|
|
ieee80211_dump_nodes(struct ieee80211_node_table *nt)
|
|
{
|
|
ieee80211_iterate_nodes(nt,
|
|
(ieee80211_iter_func *) ieee80211_dump_node, nt);
|
|
}
|
|
|
|
void
|
|
ieee80211_notify_erp(struct ieee80211com *ic)
|
|
{
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
|
|
ieee80211_beacon_notify(ic, IEEE80211_BEACON_ERP);
|
|
}
|
|
|
|
/*
|
|
* Handle a station joining an 11g network.
|
|
*/
|
|
static void
|
|
ieee80211_node_join_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
|
|
{
|
|
|
|
IEEE80211_LOCK_ASSERT(ic);
|
|
|
|
/*
|
|
* Station isn't capable of short slot time. Bump
|
|
* the count of long slot time stations and disable
|
|
* use of short slot time. Note that the actual switch
|
|
* over to long slot time use may not occur until the
|
|
* next beacon transmission (per sec. 7.3.1.4 of 11g).
|
|
*/
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
|
|
ic->ic_longslotsta++;
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni,
|
|
"station needs long slot time, count %d",
|
|
ic->ic_longslotsta);
|
|
/* XXX vap's w/ conflicting needs won't work */
|
|
if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) {
|
|
/*
|
|
* Don't force slot time when switched to turbo
|
|
* mode as non-ERP stations won't be present; this
|
|
* need only be done when on the normal G channel.
|
|
*/
|
|
ieee80211_set_shortslottime(ic, 0);
|
|
}
|
|
}
|
|
/*
|
|
* If the new station is not an ERP station
|
|
* then bump the counter and enable protection
|
|
* if configured.
|
|
*/
|
|
if (!ieee80211_iserp_rateset(ic, &ni->ni_rates)) {
|
|
ic->ic_nonerpsta++;
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni,
|
|
"station is !ERP, %d non-ERP stations associated",
|
|
ic->ic_nonerpsta);
|
|
/*
|
|
* If station does not support short preamble
|
|
* then we must enable use of Barker preamble.
|
|
*/
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) {
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni,
|
|
"%s", "station needs long preamble");
|
|
ic->ic_flags |= IEEE80211_F_USEBARKER;
|
|
ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
|
|
}
|
|
/*
|
|
* If protection is configured, enable it.
|
|
*/
|
|
if (ic->ic_protmode != IEEE80211_PROT_NONE &&
|
|
ic->ic_nonerpsta == 1 &&
|
|
(ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
"%s: enable use of protection\n", __func__);
|
|
ic->ic_flags |= IEEE80211_F_USEPROT;
|
|
ieee80211_notify_erp(ic);
|
|
}
|
|
} else
|
|
ni->ni_flags |= IEEE80211_NODE_ERP;
|
|
}
|
|
|
|
void
|
|
ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp)
|
|
{
|
|
int newassoc;
|
|
|
|
if (ni->ni_associd == 0) {
|
|
uint16_t aid;
|
|
|
|
IEEE80211_LOCK(ic);
|
|
/*
|
|
* It would be good to search the bitmap
|
|
* more efficiently, but this will do for now.
|
|
*/
|
|
for (aid = 1; aid < ic->ic_max_aid; aid++) {
|
|
if (!IEEE80211_AID_ISSET(aid,
|
|
ic->ic_aid_bitmap))
|
|
break;
|
|
}
|
|
if (aid >= ic->ic_max_aid) {
|
|
IEEE80211_UNLOCK(ic);
|
|
IEEE80211_SEND_MGMT(ic, ni, resp,
|
|
IEEE80211_REASON_ASSOC_TOOMANY);
|
|
ieee80211_node_leave(ic, ni);
|
|
return;
|
|
}
|
|
ni->ni_associd = aid | 0xc000;
|
|
ni->ni_jointime = time_uptime;
|
|
IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap);
|
|
ic->ic_sta_assoc++;
|
|
|
|
if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
|
|
ieee80211_ht_node_join(ni);
|
|
if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
|
|
IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
|
|
ieee80211_node_join_11g(ic, ni);
|
|
IEEE80211_UNLOCK(ic);
|
|
|
|
newassoc = 1;
|
|
} else
|
|
newassoc = 0;
|
|
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
|
|
"station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s",
|
|
IEEE80211_NODE_AID(ni),
|
|
ic->ic_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long",
|
|
ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long",
|
|
ic->ic_flags & IEEE80211_F_USEPROT ? ", protection" : "",
|
|
ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
|
|
ni->ni_flags & IEEE80211_NODE_HT ?
|
|
(ni->ni_chw == 20 ? ", HT20" : ", HT40") : "",
|
|
ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
|
|
IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_FF) ?
|
|
", fast-frames" : "",
|
|
IEEE80211_ATH_CAP(ic, ni, IEEE80211_NODE_TURBOP) ?
|
|
", turbo" : ""
|
|
);
|
|
|
|
/* give driver a chance to setup state like ni_txrate */
|
|
if (ic->ic_newassoc != NULL)
|
|
ic->ic_newassoc(ni, newassoc);
|
|
IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS);
|
|
/* tell the authenticator about new station */
|
|
if (ic->ic_auth->ia_node_join != NULL)
|
|
ic->ic_auth->ia_node_join(ic, ni);
|
|
ieee80211_notify_node_join(ic, ni,
|
|
resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
|
|
}
|
|
|
|
static void
|
|
disable_protection(struct ieee80211com *ic)
|
|
{
|
|
KASSERT(ic->ic_nonerpsta == 0 &&
|
|
(ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0,
|
|
("%d non ERP stations, flags 0x%x", ic->ic_nonerpsta,
|
|
ic->ic_flags_ext));
|
|
|
|
ic->ic_flags &= ~IEEE80211_F_USEPROT;
|
|
/* XXX verify mode? */
|
|
if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) {
|
|
ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
|
|
ic->ic_flags &= ~IEEE80211_F_USEBARKER;
|
|
}
|
|
ieee80211_notify_erp(ic);
|
|
}
|
|
|
|
/*
|
|
* Handle a station leaving an 11g network.
|
|
*/
|
|
static void
|
|
ieee80211_node_leave_11g(struct ieee80211com *ic, struct ieee80211_node *ni)
|
|
{
|
|
|
|
IEEE80211_LOCK_ASSERT(ic);
|
|
|
|
KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan),
|
|
("not in 11g, bss %u:0x%x, curmode %u", ic->ic_bsschan->ic_freq,
|
|
ic->ic_bsschan->ic_flags, ic->ic_curmode));
|
|
|
|
/*
|
|
* If a long slot station do the slot time bookkeeping.
|
|
*/
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) {
|
|
KASSERT(ic->ic_longslotsta > 0,
|
|
("bogus long slot station count %d", ic->ic_longslotsta));
|
|
ic->ic_longslotsta--;
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni,
|
|
"long slot time station leaves, count now %d",
|
|
ic->ic_longslotsta);
|
|
if (ic->ic_longslotsta == 0) {
|
|
/*
|
|
* Re-enable use of short slot time if supported
|
|
* and not operating in IBSS mode (per spec).
|
|
*/
|
|
if ((ic->ic_caps & IEEE80211_C_SHSLOT) &&
|
|
ic->ic_opmode != IEEE80211_M_IBSS) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
"%s: re-enable use of short slot time\n",
|
|
__func__);
|
|
ieee80211_set_shortslottime(ic, 1);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* If a non-ERP station do the protection-related bookkeeping.
|
|
*/
|
|
if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) {
|
|
KASSERT(ic->ic_nonerpsta > 0,
|
|
("bogus non-ERP station count %d", ic->ic_nonerpsta));
|
|
ic->ic_nonerpsta--;
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC, ni,
|
|
"non-ERP station leaves, count now %d%s", ic->ic_nonerpsta,
|
|
(ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) ?
|
|
" (non-ERP sta present)" : "");
|
|
if (ic->ic_nonerpsta == 0 &&
|
|
(ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
"%s: disable use of protection\n", __func__);
|
|
disable_protection(ic);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Time out presence of an overlapping bss with non-ERP
|
|
* stations. When operating in hostap mode we listen for
|
|
* beacons from other stations and if we identify a non-ERP
|
|
* station is present we enable protection. To identify
|
|
* when all non-ERP stations are gone we time out this
|
|
* condition.
|
|
*/
|
|
static void
|
|
ieee80211_erp_timeout(struct ieee80211com *ic)
|
|
{
|
|
|
|
IEEE80211_LOCK_ASSERT(ic);
|
|
|
|
if ((ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR) &&
|
|
time_after(ticks, ic->ic_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) {
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
"%s\n", "age out non-ERP sta present on channel");
|
|
ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
|
|
if (ic->ic_nonerpsta == 0)
|
|
disable_protection(ic);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle bookkeeping for station deauthentication/disassociation
|
|
* when operating as an ap.
|
|
*/
|
|
void
|
|
ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211_node_table *nt = ni->ni_table;
|
|
|
|
IEEE80211_NOTE(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni,
|
|
"station with aid %d leaves", IEEE80211_NODE_AID(ni));
|
|
|
|
KASSERT(ic->ic_opmode != IEEE80211_M_STA,
|
|
("unexpected operating mode %u", ic->ic_opmode));
|
|
/*
|
|
* If node wasn't previously associated all
|
|
* we need to do is reclaim the reference.
|
|
*/
|
|
/* XXX ibss mode bypasses 11g and notification */
|
|
if (ni->ni_associd == 0)
|
|
goto done;
|
|
/*
|
|
* Tell the authenticator the station is leaving.
|
|
* Note that we must do this before yanking the
|
|
* association id as the authenticator uses the
|
|
* associd to locate it's state block.
|
|
*/
|
|
if (ic->ic_auth->ia_node_leave != NULL)
|
|
ic->ic_auth->ia_node_leave(ic, ni);
|
|
|
|
IEEE80211_LOCK(ic);
|
|
IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap);
|
|
ni->ni_associd = 0;
|
|
ic->ic_sta_assoc--;
|
|
|
|
if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan))
|
|
ieee80211_ht_node_leave(ni);
|
|
if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
|
|
IEEE80211_IS_CHAN_FULL(ic->ic_bsschan))
|
|
ieee80211_node_leave_11g(ic, ni);
|
|
IEEE80211_UNLOCK(ic);
|
|
/*
|
|
* Cleanup station state. In particular clear various
|
|
* state that might otherwise be reused if the node
|
|
* is reused before the reference count goes to zero
|
|
* (and memory is reclaimed).
|
|
*/
|
|
ieee80211_sta_leave(ic, ni);
|
|
done:
|
|
/*
|
|
* Remove the node from any table it's recorded in and
|
|
* drop the caller's reference. Removal from the table
|
|
* is important to insure the node is not reprocessed
|
|
* for inactivity.
|
|
*/
|
|
if (nt != NULL) {
|
|
IEEE80211_NODE_LOCK(nt);
|
|
node_reclaim(nt, ni);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
} else
|
|
ieee80211_free_node(ni);
|
|
}
|
|
|
|
int8_t
|
|
ieee80211_getrssi(struct ieee80211com *ic)
|
|
{
|
|
#define NZ(x) ((x) == 0 ? 1 : (x))
|
|
struct ieee80211_node_table *nt = &ic->ic_sta;
|
|
int rssi_samples;
|
|
int32_t rssi_total;
|
|
struct ieee80211_node *ni;
|
|
|
|
rssi_total = 0;
|
|
rssi_samples = 0;
|
|
switch (ic->ic_opmode) {
|
|
case IEEE80211_M_IBSS: /* average of all ibss neighbors */
|
|
case IEEE80211_M_AHDEMO: /* average of all neighbors */
|
|
case IEEE80211_M_HOSTAP: /* average of all associated stations */
|
|
/* XXX locking */
|
|
TAILQ_FOREACH(ni, &nt->nt_node, ni_list)
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_IBSS)) {
|
|
int8_t rssi = ic->ic_node_getrssi(ni);
|
|
if (rssi != 0) {
|
|
rssi_samples++;
|
|
rssi_total += rssi;
|
|
}
|
|
}
|
|
break;
|
|
case IEEE80211_M_MONITOR: /* XXX */
|
|
case IEEE80211_M_STA: /* use stats from associated ap */
|
|
default:
|
|
if (ic->ic_bss != NULL)
|
|
rssi_total = ic->ic_node_getrssi(ic->ic_bss);
|
|
rssi_samples = 1;
|
|
break;
|
|
}
|
|
return rssi_total / NZ(rssi_samples);
|
|
#undef NZ
|
|
}
|
|
|
|
void
|
|
ieee80211_getsignal(struct ieee80211com *ic, int8_t *rssi, int8_t *noise)
|
|
{
|
|
|
|
if (ic->ic_bss == NULL) /* NB: shouldn't happen */
|
|
return;
|
|
ic->ic_node_getsignal(ic->ic_bss, rssi, noise);
|
|
/* for non-station mode return avg'd rssi accounting */
|
|
if (ic->ic_opmode != IEEE80211_M_STA)
|
|
*rssi = ieee80211_getrssi(ic);
|
|
}
|
|
|
|
/*
|
|
* Node table support.
|
|
*/
|
|
|
|
static void
|
|
ieee80211_node_table_init(struct ieee80211com *ic,
|
|
struct ieee80211_node_table *nt,
|
|
const char *name, int inact, int keyixmax)
|
|
{
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
"%s %s table, inact %u\n", __func__, name, inact);
|
|
|
|
nt->nt_ic = ic;
|
|
/* XXX need unit */
|
|
IEEE80211_NODE_LOCK_INIT(nt, ic->ic_ifp->if_xname);
|
|
IEEE80211_SCAN_LOCK_INIT(nt, ic->ic_ifp->if_xname);
|
|
TAILQ_INIT(&nt->nt_node);
|
|
nt->nt_name = name;
|
|
nt->nt_scangen = 1;
|
|
nt->nt_inact_init = inact;
|
|
nt->nt_keyixmax = keyixmax;
|
|
if (nt->nt_keyixmax > 0) {
|
|
MALLOC(nt->nt_keyixmap, struct ieee80211_node **,
|
|
keyixmax * sizeof(struct ieee80211_node *),
|
|
M_80211_NODE, M_NOWAIT | M_ZERO);
|
|
if (nt->nt_keyixmap == NULL)
|
|
if_printf(ic->ic_ifp,
|
|
"Cannot allocate key index map with %u entries\n",
|
|
keyixmax);
|
|
} else
|
|
nt->nt_keyixmap = NULL;
|
|
}
|
|
|
|
static void
|
|
ieee80211_node_table_reset(struct ieee80211_node_table *nt)
|
|
{
|
|
|
|
IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
|
|
"%s %s table\n", __func__, nt->nt_name);
|
|
|
|
IEEE80211_NODE_LOCK(nt);
|
|
ieee80211_free_allnodes_locked(nt);
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
}
|
|
|
|
static void
|
|
ieee80211_node_table_cleanup(struct ieee80211_node_table *nt)
|
|
{
|
|
|
|
IEEE80211_DPRINTF(nt->nt_ic, IEEE80211_MSG_NODE,
|
|
"%s %s table\n", __func__, nt->nt_name);
|
|
|
|
IEEE80211_NODE_LOCK(nt);
|
|
ieee80211_free_allnodes_locked(nt);
|
|
if (nt->nt_keyixmap != NULL) {
|
|
/* XXX verify all entries are NULL */
|
|
int i;
|
|
for (i = 0; i < nt->nt_keyixmax; i++)
|
|
if (nt->nt_keyixmap[i] != NULL)
|
|
printf("%s: %s[%u] still active\n", __func__,
|
|
nt->nt_name, i);
|
|
FREE(nt->nt_keyixmap, M_80211_NODE);
|
|
nt->nt_keyixmap = NULL;
|
|
}
|
|
IEEE80211_SCAN_LOCK_DESTROY(nt);
|
|
IEEE80211_NODE_LOCK_DESTROY(nt);
|
|
}
|