2003-06-23 16:55:01 +00:00
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/*-
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2003-06-27 05:13:52 +00:00
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* Copyright (c) 2001 Atsushi Onoe
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2007-06-06 04:56:04 +00:00
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* Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
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2003-06-23 16:55:01 +00:00
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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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2003-06-27 05:13:52 +00:00
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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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2003-06-23 16:55:01 +00:00
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*
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2003-06-27 05:13:52 +00:00
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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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2003-06-23 16:55:01 +00:00
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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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/kernel.h>
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#include <sys/endian.h>
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2004-12-08 17:26:47 +00:00
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#include <sys/socket.h>
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2003-06-23 16:55:01 +00:00
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2004-12-08 17:26:47 +00:00
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#include <net/bpf.h>
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2003-06-23 16:55:01 +00:00
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#include <net/ethernet.h>
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2004-12-08 17:26:47 +00:00
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#include <net/if.h>
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2003-06-23 16:55:01 +00:00
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#include <net/if_llc.h>
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2004-12-08 17:26:47 +00:00
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#include <net/if_media.h>
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#include <net/if_vlan_var.h>
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2003-06-23 16:55:01 +00:00
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#include <net80211/ieee80211_var.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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2004-12-08 17:26:47 +00:00
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#endif
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#ifdef IEEE80211_DEBUG
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/*
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* Decide if an outbound management frame should be
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* printed when debugging is enabled. This filters some
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* of the less interesting frames that come frequently
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* (e.g. beacons).
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*/
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static __inline int
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doprint(struct ieee80211com *ic, int subtype)
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{
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switch (subtype) {
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case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
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return (ic->ic_opmode == IEEE80211_M_IBSS);
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}
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return 1;
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}
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2003-06-23 16:55:01 +00:00
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#endif
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2005-07-22 20:48:11 +00:00
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/*
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* Set the direction field and address fields of an outgoing
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* non-QoS frame. Note this should be called early on in
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* constructing a frame as it sets i_fc[1]; other bits can
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* then be or'd in.
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*/
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static void
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ieee80211_send_setup(struct ieee80211com *ic,
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struct ieee80211_node *ni,
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struct ieee80211_frame *wh,
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int type,
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const u_int8_t sa[IEEE80211_ADDR_LEN],
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const u_int8_t da[IEEE80211_ADDR_LEN],
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const u_int8_t bssid[IEEE80211_ADDR_LEN])
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{
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#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
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wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
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if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
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switch (ic->ic_opmode) {
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case IEEE80211_M_STA:
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wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
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IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
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IEEE80211_ADDR_COPY(wh->i_addr2, sa);
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IEEE80211_ADDR_COPY(wh->i_addr3, da);
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break;
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case IEEE80211_M_IBSS:
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case IEEE80211_M_AHDEMO:
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wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
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IEEE80211_ADDR_COPY(wh->i_addr1, da);
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IEEE80211_ADDR_COPY(wh->i_addr2, sa);
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IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
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break;
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case IEEE80211_M_HOSTAP:
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wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
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IEEE80211_ADDR_COPY(wh->i_addr1, da);
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IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
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IEEE80211_ADDR_COPY(wh->i_addr3, sa);
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break;
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case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
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break;
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}
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} else {
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wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
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IEEE80211_ADDR_COPY(wh->i_addr1, da);
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IEEE80211_ADDR_COPY(wh->i_addr2, sa);
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IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
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}
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*(u_int16_t *)&wh->i_dur[0] = 0;
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/* NB: use non-QoS tid */
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*(u_int16_t *)&wh->i_seq[0] =
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2007-03-11 07:06:08 +00:00
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htole16(ni->ni_txseqs[IEEE80211_NONQOS_TID] << IEEE80211_SEQ_SEQ_SHIFT);
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ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
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2005-07-22 20:48:11 +00:00
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#undef WH4
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}
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2003-08-19 22:17:04 +00:00
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/*
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* Send a management frame to the specified node. The node pointer
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* must have a reference as the pointer will be passed to the driver
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* and potentially held for a long time. If the frame is successfully
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* dispatched to the driver, then it is responsible for freeing the
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* reference (and potentially free'ing up any associated storage).
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*/
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static int
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2004-12-08 17:26:47 +00:00
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ieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni,
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2006-02-08 17:30:31 +00:00
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struct mbuf *m, int type, int timer)
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2003-06-23 16:55:01 +00:00
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{
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2004-12-08 17:26:47 +00:00
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struct ifnet *ifp = ic->ic_ifp;
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2003-06-23 16:55:01 +00:00
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struct ieee80211_frame *wh;
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2003-08-19 22:17:04 +00:00
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KASSERT(ni != NULL, ("null node"));
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2003-06-23 16:55:01 +00:00
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2003-08-19 22:17:04 +00:00
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/*
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* Yech, hack alert! We want to pass the node down to the
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* driver's start routine. If we don't do so then the start
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* routine must immediately look it up again and that can
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* cause a lock order reversal if, for example, this frame
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* is being sent because the station is being timedout and
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* the frame being sent is a DEAUTH message. We could stick
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* this in an m_tag and tack that on to the mbuf. However
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* that's rather expensive to do for every frame so instead
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* we stuff it in the rcvif field since outbound frames do
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* not (presently) use this.
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*/
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2003-06-23 16:55:01 +00:00
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M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
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if (m == NULL)
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return ENOMEM;
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2003-08-19 22:17:04 +00:00
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KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
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m->m_pkthdr.rcvif = (void *)ni;
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2003-06-23 16:55:01 +00:00
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wh = mtod(m, struct ieee80211_frame *);
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2005-07-22 20:48:11 +00:00
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ieee80211_send_setup(ic, ni, wh,
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IEEE80211_FC0_TYPE_MGT | type,
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ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid);
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2004-12-08 17:26:47 +00:00
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if ((m->m_flags & M_LINK0) != 0 && ni->ni_challenge != NULL) {
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m->m_flags &= ~M_LINK0;
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH,
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"[%s] encrypting frame (%s)\n",
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ether_sprintf(wh->i_addr1), __func__);
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wh->i_fc[1] |= IEEE80211_FC1_WEP;
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}
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2003-06-23 16:55:01 +00:00
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#ifdef IEEE80211_DEBUG
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2004-12-08 17:26:47 +00:00
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/* avoid printing too many frames */
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if ((ieee80211_msg_debug(ic) && doprint(ic, type)) ||
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ieee80211_msg_dumppkts(ic)) {
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printf("[%s] send %s on channel %u\n",
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ether_sprintf(wh->i_addr1),
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ieee80211_mgt_subtype_name[
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(type & IEEE80211_FC0_SUBTYPE_MASK) >>
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IEEE80211_FC0_SUBTYPE_SHIFT],
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2005-08-10 16:22:30 +00:00
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ieee80211_chan2ieee(ic, ic->ic_curchan));
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2003-06-23 16:55:01 +00:00
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}
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2004-12-08 17:26:47 +00:00
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#endif
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IEEE80211_NODE_STAT(ni, tx_mgmt);
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2003-06-23 16:55:01 +00:00
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IF_ENQUEUE(&ic->ic_mgtq, m);
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2006-02-08 17:30:31 +00:00
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if (timer) {
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/*
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* Set the mgt frame timeout.
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*/
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ic->ic_mgt_timer = timer;
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ifp->if_timer = 1;
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}
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2004-07-27 23:20:45 +00:00
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if_start(ifp);
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2003-06-23 16:55:01 +00:00
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return 0;
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}
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2006-07-26 03:15:16 +00:00
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/*
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* Raw packet transmit stub for legacy drivers.
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* Send the packet through the mgt q so we bypass
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* the normal encapsulation work.
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*/
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int
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ieee80211_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
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const struct ieee80211_bpf_params *params)
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{
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struct ieee80211com *ic = ni->ni_ic;
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struct ifnet *ifp = ic->ic_ifp;
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m->m_pkthdr.rcvif = (void *) ni;
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IF_ENQUEUE(&ic->ic_mgtq, m);
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if_start(ifp);
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ifp->if_opackets++;
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return 0;
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}
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/*
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* 802.11 output routine. This is (currently) used only to
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* connect bpf write calls to the 802.11 layer for injecting
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* raw 802.11 frames. Note we locate the ieee80211com from
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* the ifnet using a spare field setup at attach time. This
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* will go away when the virtual ap support comes in.
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*/
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int
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ieee80211_output(struct ifnet *ifp, struct mbuf *m,
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struct sockaddr *dst, struct rtentry *rt0)
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{
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#define senderr(e) do { error = (e); goto bad;} while (0)
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struct ieee80211com *ic = ifp->if_spare2; /* XXX */
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struct ieee80211_node *ni = NULL;
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struct ieee80211_frame *wh;
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int error;
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/*
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* Hand to the 802.3 code if not tagged as
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* a raw 802.11 frame.
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*/
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if (dst->sa_family != AF_IEEE80211)
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return ether_output(ifp, m, dst, rt0);
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#ifdef MAC
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error = mac_check_ifnet_transmit(ifp, m);
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if (error)
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senderr(error);
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#endif
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if (ifp->if_flags & IFF_MONITOR)
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senderr(ENETDOWN);
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if ((ifp->if_flags & IFF_UP) == 0)
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senderr(ENETDOWN);
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/* XXX bypass bridge, pfil, carp, etc. */
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if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
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senderr(EIO); /* XXX */
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wh = mtod(m, struct ieee80211_frame *);
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if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
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IEEE80211_FC0_VERSION_0)
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senderr(EIO); /* XXX */
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/* locate destination node */
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switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
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case IEEE80211_FC1_DIR_NODS:
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case IEEE80211_FC1_DIR_FROMDS:
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ni = ieee80211_find_txnode(ic, wh->i_addr1);
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break;
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case IEEE80211_FC1_DIR_TODS:
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case IEEE80211_FC1_DIR_DSTODS:
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if (m->m_pkthdr.len < sizeof(struct ieee80211_frame))
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senderr(EIO); /* XXX */
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ni = ieee80211_find_txnode(ic, wh->i_addr3);
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break;
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default:
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senderr(EIO); /* XXX */
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}
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if (ni == NULL) {
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/*
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* Permit packets w/ bpf params through regardless
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* (see below about sa_len).
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*/
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if (dst->sa_len == 0)
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senderr(EHOSTUNREACH);
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ni = ieee80211_ref_node(ic->ic_bss);
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}
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/* XXX ctrl frames should go through */
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if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
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(m->m_flags & M_PWR_SAV) == 0) {
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/*
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* Station in power save mode; pass the frame
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* to the 802.11 layer and continue. We'll get
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* the frame back when the time is right.
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*/
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ieee80211_pwrsave(ic, ni, m);
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error = 0;
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goto reclaim;
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}
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/* calculate priority so drivers can find the tx queue */
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/* XXX assumes an 802.3 frame */
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if (ieee80211_classify(ic, m, ni))
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senderr(EIO); /* XXX */
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BPF_MTAP(ifp, m);
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/*
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* NB: DLT_IEEE802_11_RADIO identifies the parameters are
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* present by setting the sa_len field of the sockaddr (yes,
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* this is a hack).
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* NB: we assume sa_data is suitably aligned to cast.
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*/
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return ic->ic_raw_xmit(ni, m, (const struct ieee80211_bpf_params *)
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(dst->sa_len ? dst->sa_data : NULL));
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bad:
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if (m != NULL)
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m_freem(m);
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reclaim:
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|
|
|
if (ni != NULL)
|
|
|
|
ieee80211_free_node(ni);
|
|
|
|
return error;
|
|
|
|
#undef senderr
|
|
|
|
}
|
|
|
|
|
2003-08-19 22:17:04 +00:00
|
|
|
/*
|
2004-12-08 17:26:47 +00:00
|
|
|
* Send a null data frame to the specified node.
|
2005-07-31 06:12:32 +00:00
|
|
|
*
|
|
|
|
* NB: the caller is assumed to have setup a node reference
|
|
|
|
* for use; this is necessary to deal with a race condition
|
|
|
|
* when probing for inactive stations.
|
2004-12-08 17:26:47 +00:00
|
|
|
*/
|
|
|
|
int
|
2005-07-22 17:31:18 +00:00
|
|
|
ieee80211_send_nulldata(struct ieee80211_node *ni)
|
2004-12-08 17:26:47 +00:00
|
|
|
{
|
2005-07-22 17:31:18 +00:00
|
|
|
struct ieee80211com *ic = ni->ni_ic;
|
2004-12-08 17:26:47 +00:00
|
|
|
struct ifnet *ifp = ic->ic_ifp;
|
|
|
|
struct mbuf *m;
|
|
|
|
struct ieee80211_frame *wh;
|
|
|
|
|
2005-11-02 13:46:32 +00:00
|
|
|
MGETHDR(m, M_NOWAIT, MT_DATA);
|
2004-12-08 17:26:47 +00:00
|
|
|
if (m == NULL) {
|
|
|
|
/* XXX debug msg */
|
|
|
|
ic->ic_stats.is_tx_nobuf++;
|
2005-07-31 06:12:32 +00:00
|
|
|
ieee80211_unref_node(&ni);
|
2004-12-08 17:26:47 +00:00
|
|
|
return ENOMEM;
|
|
|
|
}
|
2005-07-31 06:12:32 +00:00
|
|
|
m->m_pkthdr.rcvif = (void *) ni;
|
2004-12-08 17:26:47 +00:00
|
|
|
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
2005-07-22 20:48:11 +00:00
|
|
|
ieee80211_send_setup(ic, ni, wh,
|
|
|
|
IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
|
|
|
|
ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid);
|
|
|
|
/* NB: power management bit is never sent by an AP */
|
|
|
|
if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
|
|
|
|
ic->ic_opmode != IEEE80211_M_HOSTAP)
|
|
|
|
wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
|
2004-12-08 17:26:47 +00:00
|
|
|
m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame);
|
|
|
|
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_data);
|
|
|
|
|
2005-07-22 20:48:11 +00:00
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
|
|
|
|
"[%s] send null data frame on channel %u, pwr mgt %s\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr),
|
2005-08-10 16:22:30 +00:00
|
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan),
|
2005-07-22 20:48:11 +00:00
|
|
|
wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
|
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */
|
|
|
|
if_start(ifp);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Assign priority to a frame based on any vlan tag assigned
|
|
|
|
* to the station and/or any Diffserv setting in an IP header.
|
|
|
|
* Finally, if an ACM policy is setup (in station mode) it's
|
|
|
|
* applied.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
ieee80211_classify(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_node *ni)
|
|
|
|
{
|
|
|
|
int v_wme_ac, d_wme_ac, ac;
|
|
|
|
#ifdef INET
|
|
|
|
struct ether_header *eh;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
|
|
|
|
ac = WME_AC_BE;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If node has a vlan tag then all traffic
|
|
|
|
* to it must have a matching tag.
|
|
|
|
*/
|
|
|
|
v_wme_ac = 0;
|
|
|
|
if (ni->ni_vlan != 0) {
|
2006-09-17 13:33:30 +00:00
|
|
|
if ((m->m_flags & M_VLANTAG) == 0) {
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_NODE_STAT(ni, tx_novlantag);
|
|
|
|
return 1;
|
|
|
|
}
|
2006-09-17 13:33:30 +00:00
|
|
|
if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) !=
|
2004-12-08 17:26:47 +00:00
|
|
|
EVL_VLANOFTAG(ni->ni_vlan)) {
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
/* map vlan priority to AC */
|
|
|
|
switch (EVL_PRIOFTAG(ni->ni_vlan)) {
|
|
|
|
case 1:
|
|
|
|
case 2:
|
|
|
|
v_wme_ac = WME_AC_BK;
|
|
|
|
break;
|
|
|
|
case 0:
|
|
|
|
case 3:
|
|
|
|
v_wme_ac = WME_AC_BE;
|
|
|
|
break;
|
|
|
|
case 4:
|
|
|
|
case 5:
|
|
|
|
v_wme_ac = WME_AC_VI;
|
|
|
|
break;
|
|
|
|
case 6:
|
|
|
|
case 7:
|
|
|
|
v_wme_ac = WME_AC_VO;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef INET
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
|
|
if (eh->ether_type == htons(ETHERTYPE_IP)) {
|
|
|
|
const struct ip *ip = (struct ip *)
|
|
|
|
(mtod(m, u_int8_t *) + sizeof (*eh));
|
|
|
|
/*
|
|
|
|
* IP frame, map the TOS field.
|
|
|
|
*/
|
|
|
|
switch (ip->ip_tos) {
|
|
|
|
case 0x08:
|
|
|
|
case 0x20:
|
|
|
|
d_wme_ac = WME_AC_BK; /* background */
|
|
|
|
break;
|
|
|
|
case 0x28:
|
|
|
|
case 0xa0:
|
|
|
|
d_wme_ac = WME_AC_VI; /* video */
|
|
|
|
break;
|
|
|
|
case 0x30: /* voice */
|
|
|
|
case 0xe0:
|
|
|
|
case 0x88: /* XXX UPSD */
|
|
|
|
case 0xb8:
|
|
|
|
d_wme_ac = WME_AC_VO;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
d_wme_ac = WME_AC_BE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
#endif /* INET */
|
|
|
|
d_wme_ac = WME_AC_BE;
|
|
|
|
#ifdef INET
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
|
|
* Use highest priority AC.
|
|
|
|
*/
|
|
|
|
if (v_wme_ac > d_wme_ac)
|
|
|
|
ac = v_wme_ac;
|
|
|
|
else
|
|
|
|
ac = d_wme_ac;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Apply ACM policy.
|
|
|
|
*/
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_STA) {
|
|
|
|
static const int acmap[4] = {
|
|
|
|
WME_AC_BK, /* WME_AC_BE */
|
|
|
|
WME_AC_BK, /* WME_AC_BK */
|
|
|
|
WME_AC_BE, /* WME_AC_VI */
|
|
|
|
WME_AC_VI, /* WME_AC_VO */
|
|
|
|
};
|
|
|
|
while (ac != WME_AC_BK &&
|
|
|
|
ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
|
|
|
|
ac = acmap[ac];
|
|
|
|
}
|
|
|
|
done:
|
|
|
|
M_WME_SETAC(m, ac);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2004-12-31 21:54:53 +00:00
|
|
|
* Insure there is sufficient contiguous space to encapsulate the
|
|
|
|
* 802.11 data frame. If room isn't already there, arrange for it.
|
|
|
|
* Drivers and cipher modules assume we have done the necessary work
|
|
|
|
* and fail rudely if they don't find the space they need.
|
|
|
|
*/
|
|
|
|
static struct mbuf *
|
|
|
|
ieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize,
|
|
|
|
struct ieee80211_key *key, struct mbuf *m)
|
|
|
|
{
|
2006-12-01 17:58:33 +00:00
|
|
|
#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
|
2004-12-31 21:54:53 +00:00
|
|
|
int needed_space = hdrsize;
|
|
|
|
|
|
|
|
if (key != NULL) {
|
|
|
|
/* XXX belongs in crypto code? */
|
|
|
|
needed_space += key->wk_cipher->ic_header;
|
|
|
|
/* XXX frags */
|
2006-03-15 21:27:08 +00:00
|
|
|
/*
|
|
|
|
* When crypto is being done in the host we must insure
|
|
|
|
* the data are writable for the cipher routines; clone
|
|
|
|
* a writable mbuf chain.
|
|
|
|
* XXX handle SWMIC specially
|
|
|
|
*/
|
|
|
|
if (key->wk_flags & (IEEE80211_KEY_SWCRYPT|IEEE80211_KEY_SWMIC)) {
|
|
|
|
m = m_unshare(m, M_NOWAIT);
|
|
|
|
if (m == NULL) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
|
|
|
|
"%s: cannot get writable mbuf\n", __func__);
|
|
|
|
ic->ic_stats.is_tx_nobuf++; /* XXX new stat */
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
2004-12-31 21:54:53 +00:00
|
|
|
}
|
|
|
|
/*
|
|
|
|
* We know we are called just before stripping an Ethernet
|
|
|
|
* header and prepending an LLC header. This means we know
|
|
|
|
* there will be
|
2006-12-01 17:58:33 +00:00
|
|
|
* sizeof(struct ether_header) - sizeof(struct llc)
|
2004-12-31 21:54:53 +00:00
|
|
|
* bytes recovered to which we need additional space for the
|
|
|
|
* 802.11 header and any crypto header.
|
|
|
|
*/
|
|
|
|
/* XXX check trailing space and copy instead? */
|
|
|
|
if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
|
|
|
|
struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type);
|
|
|
|
if (n == NULL) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
|
|
|
|
"%s: cannot expand storage\n", __func__);
|
|
|
|
ic->ic_stats.is_tx_nobuf++;
|
|
|
|
m_freem(m);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
KASSERT(needed_space <= MHLEN,
|
|
|
|
("not enough room, need %u got %zu\n", needed_space, MHLEN));
|
|
|
|
/*
|
|
|
|
* Setup new mbuf to have leading space to prepend the
|
|
|
|
* 802.11 header and any crypto header bits that are
|
|
|
|
* required (the latter are added when the driver calls
|
|
|
|
* back to ieee80211_crypto_encap to do crypto encapsulation).
|
|
|
|
*/
|
|
|
|
/* NB: must be first 'cuz it clobbers m_data */
|
|
|
|
m_move_pkthdr(n, m);
|
|
|
|
n->m_len = 0; /* NB: m_gethdr does not set */
|
|
|
|
n->m_data += needed_space;
|
|
|
|
/*
|
|
|
|
* Pull up Ethernet header to create the expected layout.
|
|
|
|
* We could use m_pullup but that's overkill (i.e. we don't
|
|
|
|
* need the actual data) and it cannot fail so do it inline
|
|
|
|
* for speed.
|
|
|
|
*/
|
|
|
|
/* NB: struct ether_header is known to be contiguous */
|
|
|
|
n->m_len += sizeof(struct ether_header);
|
|
|
|
m->m_len -= sizeof(struct ether_header);
|
|
|
|
m->m_data += sizeof(struct ether_header);
|
|
|
|
/*
|
|
|
|
* Replace the head of the chain.
|
|
|
|
*/
|
|
|
|
n->m_next = m;
|
|
|
|
m = n;
|
|
|
|
}
|
|
|
|
return m;
|
|
|
|
#undef TO_BE_RECLAIMED
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the transmit key to use in sending a unicast frame.
|
|
|
|
* If a unicast key is set we use that. When no unicast key is set
|
|
|
|
* we fall back to the default transmit key.
|
2004-12-08 17:26:47 +00:00
|
|
|
*/
|
|
|
|
static __inline struct ieee80211_key *
|
2004-12-31 21:54:53 +00:00
|
|
|
ieee80211_crypto_getucastkey(struct ieee80211com *ic, struct ieee80211_node *ni)
|
2004-12-08 17:26:47 +00:00
|
|
|
{
|
2007-03-11 06:36:10 +00:00
|
|
|
if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
|
2004-12-08 17:26:47 +00:00
|
|
|
if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
|
2007-03-11 06:36:10 +00:00
|
|
|
IEEE80211_KEY_UNDEFINED(&ic->ic_nw_keys[ic->ic_def_txkey]))
|
2004-12-08 17:26:47 +00:00
|
|
|
return NULL;
|
|
|
|
return &ic->ic_nw_keys[ic->ic_def_txkey];
|
|
|
|
} else {
|
|
|
|
return &ni->ni_ucastkey;
|
|
|
|
}
|
2004-12-31 21:54:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the transmit key to use in sending a multicast frame.
|
|
|
|
* Multicast traffic always uses the group key which is installed as
|
|
|
|
* the default tx key.
|
|
|
|
*/
|
|
|
|
static __inline struct ieee80211_key *
|
|
|
|
ieee80211_crypto_getmcastkey(struct ieee80211com *ic, struct ieee80211_node *ni)
|
|
|
|
{
|
|
|
|
if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
|
2007-03-11 06:36:10 +00:00
|
|
|
IEEE80211_KEY_UNDEFINED(&ic->ic_nw_keys[ic->ic_def_txkey]))
|
2004-12-31 21:54:53 +00:00
|
|
|
return NULL;
|
|
|
|
return &ic->ic_nw_keys[ic->ic_def_txkey];
|
2004-12-08 17:26:47 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Encapsulate an outbound data frame. The mbuf chain is updated.
|
|
|
|
* If an error is encountered NULL is returned. The caller is required
|
|
|
|
* to provide a node reference and pullup the ethernet header in the
|
|
|
|
* first mbuf.
|
2003-08-19 22:17:04 +00:00
|
|
|
*/
|
2003-06-23 16:55:01 +00:00
|
|
|
struct mbuf *
|
2004-12-08 17:26:47 +00:00
|
|
|
ieee80211_encap(struct ieee80211com *ic, struct mbuf *m,
|
|
|
|
struct ieee80211_node *ni)
|
2003-06-23 16:55:01 +00:00
|
|
|
{
|
|
|
|
struct ether_header eh;
|
|
|
|
struct ieee80211_frame *wh;
|
2004-12-08 17:26:47 +00:00
|
|
|
struct ieee80211_key *key;
|
2003-06-23 16:55:01 +00:00
|
|
|
struct llc *llc;
|
2004-12-31 21:54:53 +00:00
|
|
|
int hdrsize, datalen, addqos;
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
|
2003-06-23 16:55:01 +00:00
|
|
|
memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header));
|
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
/*
|
|
|
|
* Insure space for additional headers. First identify
|
|
|
|
* transmit key to use in calculating any buffer adjustments
|
|
|
|
* required. This is also used below to do privacy
|
|
|
|
* encapsulation work. Then calculate the 802.11 header
|
|
|
|
* size and any padding required by the driver.
|
|
|
|
*
|
|
|
|
* Note key may be NULL if we fall back to the default
|
|
|
|
* transmit key and that is not set. In that case the
|
|
|
|
* buffer may not be expanded as needed by the cipher
|
|
|
|
* routines, but they will/should discard it.
|
|
|
|
*/
|
|
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY) {
|
2004-12-31 21:54:53 +00:00
|
|
|
if (ic->ic_opmode == IEEE80211_M_STA ||
|
|
|
|
!IEEE80211_IS_MULTICAST(eh.ether_dhost))
|
|
|
|
key = ieee80211_crypto_getucastkey(ic, ni);
|
|
|
|
else
|
|
|
|
key = ieee80211_crypto_getmcastkey(ic, ni);
|
2004-12-08 17:26:47 +00:00
|
|
|
if (key == NULL && eh.ether_type != htons(ETHERTYPE_PAE)) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
|
2004-12-31 21:54:53 +00:00
|
|
|
"[%s] no default transmit key (%s) deftxkey %u\n",
|
|
|
|
ether_sprintf(eh.ether_dhost), __func__,
|
|
|
|
ic->ic_def_txkey);
|
|
|
|
ic->ic_stats.is_tx_nodefkey++;
|
2004-12-08 17:26:47 +00:00
|
|
|
}
|
|
|
|
} else
|
|
|
|
key = NULL;
|
|
|
|
/* XXX 4-address format */
|
2004-12-31 21:54:53 +00:00
|
|
|
/*
|
|
|
|
* XXX Some ap's don't handle QoS-encapsulated EAPOL
|
|
|
|
* frames so suppress use. This may be an issue if other
|
|
|
|
* ap's require all data frames to be QoS-encapsulated
|
|
|
|
* once negotiated in which case we'll need to make this
|
|
|
|
* configurable.
|
|
|
|
*/
|
|
|
|
addqos = (ni->ni_flags & IEEE80211_NODE_QOS) &&
|
|
|
|
eh.ether_type != htons(ETHERTYPE_PAE);
|
|
|
|
if (addqos)
|
2004-12-08 17:26:47 +00:00
|
|
|
hdrsize = sizeof(struct ieee80211_qosframe);
|
|
|
|
else
|
|
|
|
hdrsize = sizeof(struct ieee80211_frame);
|
|
|
|
if (ic->ic_flags & IEEE80211_F_DATAPAD)
|
|
|
|
hdrsize = roundup(hdrsize, sizeof(u_int32_t));
|
|
|
|
m = ieee80211_mbuf_adjust(ic, hdrsize, key, m);
|
|
|
|
if (m == NULL) {
|
|
|
|
/* NB: ieee80211_mbuf_adjust handles msgs+statistics */
|
2004-04-02 23:25:39 +00:00
|
|
|
goto bad;
|
|
|
|
}
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
/* NB: this could be optimized because of ieee80211_mbuf_adjust */
|
2006-12-01 17:58:33 +00:00
|
|
|
m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
|
2003-06-23 16:55:01 +00:00
|
|
|
llc = mtod(m, struct llc *);
|
|
|
|
llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
|
|
|
|
llc->llc_control = LLC_UI;
|
|
|
|
llc->llc_snap.org_code[0] = 0;
|
|
|
|
llc->llc_snap.org_code[1] = 0;
|
|
|
|
llc->llc_snap.org_code[2] = 0;
|
|
|
|
llc->llc_snap.ether_type = eh.ether_type;
|
2004-12-08 17:26:47 +00:00
|
|
|
datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
|
|
|
|
|
|
|
|
M_PREPEND(m, hdrsize, M_DONTWAIT);
|
2003-10-17 23:15:30 +00:00
|
|
|
if (m == NULL) {
|
2004-12-08 17:26:47 +00:00
|
|
|
ic->ic_stats.is_tx_nobuf++;
|
2003-08-19 22:17:04 +00:00
|
|
|
goto bad;
|
2003-10-17 23:15:30 +00:00
|
|
|
}
|
2003-06-23 16:55:01 +00:00
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
|
|
|
|
*(u_int16_t *)wh->i_dur = 0;
|
|
|
|
switch (ic->ic_opmode) {
|
|
|
|
case IEEE80211_M_STA:
|
|
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
|
|
|
|
break;
|
|
|
|
case IEEE80211_M_IBSS:
|
|
|
|
case IEEE80211_M_AHDEMO:
|
|
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
|
2005-01-22 20:33:37 +00:00
|
|
|
/*
|
|
|
|
* NB: always use the bssid from ic_bss as the
|
|
|
|
* neighbor's may be stale after an ibss merge
|
|
|
|
*/
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_bss->ni_bssid);
|
2003-06-23 16:55:01 +00:00
|
|
|
break;
|
|
|
|
case IEEE80211_M_HOSTAP:
|
|
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
|
|
|
|
break;
|
2003-07-21 02:49:42 +00:00
|
|
|
case IEEE80211_M_MONITOR:
|
2003-08-19 22:17:04 +00:00
|
|
|
goto bad;
|
2003-06-23 16:55:01 +00:00
|
|
|
}
|
2005-07-06 01:55:17 +00:00
|
|
|
if (m->m_flags & M_MORE_DATA)
|
|
|
|
wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
|
2004-12-31 21:54:53 +00:00
|
|
|
if (addqos) {
|
2004-12-08 17:26:47 +00:00
|
|
|
struct ieee80211_qosframe *qwh =
|
|
|
|
(struct ieee80211_qosframe *) wh;
|
|
|
|
int ac, tid;
|
|
|
|
|
|
|
|
ac = M_WME_GETAC(m);
|
|
|
|
/* map from access class/queue to 11e header priorty value */
|
|
|
|
tid = WME_AC_TO_TID(ac);
|
|
|
|
qwh->i_qos[0] = tid & IEEE80211_QOS_TID;
|
|
|
|
if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
|
|
|
|
qwh->i_qos[0] |= 1 << IEEE80211_QOS_ACKPOLICY_S;
|
|
|
|
qwh->i_qos[1] = 0;
|
|
|
|
qwh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
|
|
|
|
|
|
|
|
*(u_int16_t *)wh->i_seq =
|
|
|
|
htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT);
|
|
|
|
ni->ni_txseqs[tid]++;
|
|
|
|
} else {
|
|
|
|
*(u_int16_t *)wh->i_seq =
|
2007-03-11 07:06:08 +00:00
|
|
|
htole16(ni->ni_txseqs[IEEE80211_NONQOS_TID] << IEEE80211_SEQ_SEQ_SHIFT);
|
|
|
|
ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
|
2004-12-08 17:26:47 +00:00
|
|
|
}
|
2004-12-31 21:54:53 +00:00
|
|
|
if (key != NULL) {
|
|
|
|
/*
|
|
|
|
* IEEE 802.1X: send EAPOL frames always in the clear.
|
|
|
|
* WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
|
|
|
|
*/
|
|
|
|
if (eh.ether_type != htons(ETHERTYPE_PAE) ||
|
|
|
|
((ic->ic_flags & IEEE80211_F_WPA) &&
|
2005-02-10 17:00:48 +00:00
|
|
|
(ic->ic_opmode == IEEE80211_M_STA ?
|
2007-03-11 06:36:10 +00:00
|
|
|
!IEEE80211_KEY_UNDEFINED(key) :
|
|
|
|
!IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
|
2004-12-31 21:54:53 +00:00
|
|
|
wh->i_fc[1] |= IEEE80211_FC1_WEP;
|
|
|
|
/* XXX do fragmentation */
|
2005-06-06 04:04:38 +00:00
|
|
|
if (!ieee80211_crypto_enmic(ic, key, m, 0)) {
|
2004-12-31 21:54:53 +00:00
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
|
|
|
|
"[%s] enmic failed, discard frame\n",
|
|
|
|
ether_sprintf(eh.ether_dhost));
|
|
|
|
ic->ic_stats.is_crypto_enmicfail++;
|
|
|
|
goto bad;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2004-12-08 17:26:47 +00:00
|
|
|
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_data);
|
2006-08-10 05:37:49 +00:00
|
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1))
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_mcast);
|
|
|
|
else
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_ucast);
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
|
|
|
|
|
2003-06-23 16:55:01 +00:00
|
|
|
return m;
|
2003-08-19 22:17:04 +00:00
|
|
|
bad:
|
|
|
|
if (m != NULL)
|
|
|
|
m_freem(m);
|
|
|
|
return NULL;
|
2003-06-23 16:55:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a supported rates element id to a frame.
|
|
|
|
*/
|
2004-12-08 17:26:47 +00:00
|
|
|
static u_int8_t *
|
2003-06-23 16:55:01 +00:00
|
|
|
ieee80211_add_rates(u_int8_t *frm, const struct ieee80211_rateset *rs)
|
|
|
|
{
|
|
|
|
int nrates;
|
|
|
|
|
|
|
|
*frm++ = IEEE80211_ELEMID_RATES;
|
|
|
|
nrates = rs->rs_nrates;
|
|
|
|
if (nrates > IEEE80211_RATE_SIZE)
|
|
|
|
nrates = IEEE80211_RATE_SIZE;
|
|
|
|
*frm++ = nrates;
|
|
|
|
memcpy(frm, rs->rs_rates, nrates);
|
|
|
|
return frm + nrates;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add an extended supported rates element id to a frame.
|
|
|
|
*/
|
2004-12-08 17:26:47 +00:00
|
|
|
static u_int8_t *
|
2003-06-23 16:55:01 +00:00
|
|
|
ieee80211_add_xrates(u_int8_t *frm, const struct ieee80211_rateset *rs)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Add an extended supported rates element if operating in 11g mode.
|
|
|
|
*/
|
|
|
|
if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
|
|
|
|
int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
|
|
|
|
*frm++ = IEEE80211_ELEMID_XRATES;
|
|
|
|
*frm++ = nrates;
|
|
|
|
memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
|
|
|
|
frm += nrates;
|
|
|
|
}
|
|
|
|
return frm;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add an ssid elemet to a frame.
|
|
|
|
*/
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_add_ssid(u_int8_t *frm, const u_int8_t *ssid, u_int len)
|
|
|
|
{
|
|
|
|
*frm++ = IEEE80211_ELEMID_SSID;
|
|
|
|
*frm++ = len;
|
|
|
|
memcpy(frm, ssid, len);
|
|
|
|
return frm + len;
|
|
|
|
}
|
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
/*
|
|
|
|
* Add an erp element to a frame.
|
|
|
|
*/
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_add_erp(u_int8_t *frm, struct ieee80211com *ic)
|
2003-06-23 16:55:01 +00:00
|
|
|
{
|
2004-12-08 17:26:47 +00:00
|
|
|
u_int8_t erp;
|
|
|
|
|
|
|
|
*frm++ = IEEE80211_ELEMID_ERP;
|
|
|
|
*frm++ = 1;
|
|
|
|
erp = 0;
|
|
|
|
if (ic->ic_nonerpsta != 0)
|
|
|
|
erp |= IEEE80211_ERP_NON_ERP_PRESENT;
|
|
|
|
if (ic->ic_flags & IEEE80211_F_USEPROT)
|
|
|
|
erp |= IEEE80211_ERP_USE_PROTECTION;
|
|
|
|
if (ic->ic_flags & IEEE80211_F_USEBARKER)
|
|
|
|
erp |= IEEE80211_ERP_LONG_PREAMBLE;
|
|
|
|
*frm++ = erp;
|
|
|
|
return frm;
|
|
|
|
}
|
|
|
|
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_setup_wpa_ie(struct ieee80211com *ic, u_int8_t *ie)
|
|
|
|
{
|
|
|
|
#define WPA_OUI_BYTES 0x00, 0x50, 0xf2
|
|
|
|
#define ADDSHORT(frm, v) do { \
|
|
|
|
frm[0] = (v) & 0xff; \
|
|
|
|
frm[1] = (v) >> 8; \
|
|
|
|
frm += 2; \
|
|
|
|
} while (0)
|
|
|
|
#define ADDSELECTOR(frm, sel) do { \
|
|
|
|
memcpy(frm, sel, 4); \
|
|
|
|
frm += 4; \
|
|
|
|
} while (0)
|
|
|
|
static const u_int8_t oui[4] = { WPA_OUI_BYTES, WPA_OUI_TYPE };
|
|
|
|
static const u_int8_t cipher_suite[][4] = {
|
|
|
|
{ WPA_OUI_BYTES, WPA_CSE_WEP40 }, /* NB: 40-bit */
|
|
|
|
{ WPA_OUI_BYTES, WPA_CSE_TKIP },
|
|
|
|
{ 0x00, 0x00, 0x00, 0x00 }, /* XXX WRAP */
|
|
|
|
{ WPA_OUI_BYTES, WPA_CSE_CCMP },
|
|
|
|
{ 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */
|
|
|
|
{ WPA_OUI_BYTES, WPA_CSE_NULL },
|
|
|
|
};
|
|
|
|
static const u_int8_t wep104_suite[4] =
|
|
|
|
{ WPA_OUI_BYTES, WPA_CSE_WEP104 };
|
|
|
|
static const u_int8_t key_mgt_unspec[4] =
|
|
|
|
{ WPA_OUI_BYTES, WPA_ASE_8021X_UNSPEC };
|
|
|
|
static const u_int8_t key_mgt_psk[4] =
|
|
|
|
{ WPA_OUI_BYTES, WPA_ASE_8021X_PSK };
|
|
|
|
const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn;
|
|
|
|
u_int8_t *frm = ie;
|
|
|
|
u_int8_t *selcnt;
|
|
|
|
|
|
|
|
*frm++ = IEEE80211_ELEMID_VENDOR;
|
|
|
|
*frm++ = 0; /* length filled in below */
|
|
|
|
memcpy(frm, oui, sizeof(oui)); /* WPA OUI */
|
|
|
|
frm += sizeof(oui);
|
|
|
|
ADDSHORT(frm, WPA_VERSION);
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
/* XXX filter out CKIP */
|
|
|
|
|
|
|
|
/* multicast cipher */
|
|
|
|
if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP &&
|
|
|
|
rsn->rsn_mcastkeylen >= 13)
|
|
|
|
ADDSELECTOR(frm, wep104_suite);
|
2003-06-23 16:55:01 +00:00
|
|
|
else
|
2004-12-08 17:26:47 +00:00
|
|
|
ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]);
|
|
|
|
|
|
|
|
/* unicast cipher list */
|
|
|
|
selcnt = frm;
|
|
|
|
ADDSHORT(frm, 0); /* selector count */
|
|
|
|
if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]);
|
|
|
|
}
|
|
|
|
if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* authenticator selector list */
|
|
|
|
selcnt = frm;
|
|
|
|
ADDSHORT(frm, 0); /* selector count */
|
|
|
|
if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, key_mgt_unspec);
|
|
|
|
}
|
|
|
|
if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, key_mgt_psk);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* optional capabilities */
|
2005-06-07 00:08:48 +00:00
|
|
|
if (rsn->rsn_caps != 0 && rsn->rsn_caps != RSN_CAP_PREAUTH)
|
2004-12-08 17:26:47 +00:00
|
|
|
ADDSHORT(frm, rsn->rsn_caps);
|
|
|
|
|
|
|
|
/* calculate element length */
|
|
|
|
ie[1] = frm - ie - 2;
|
|
|
|
KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa),
|
2004-12-08 22:34:07 +00:00
|
|
|
("WPA IE too big, %u > %zu",
|
2004-12-08 17:26:47 +00:00
|
|
|
ie[1]+2, sizeof(struct ieee80211_ie_wpa)));
|
|
|
|
return frm;
|
|
|
|
#undef ADDSHORT
|
|
|
|
#undef ADDSELECTOR
|
|
|
|
#undef WPA_OUI_BYTES
|
|
|
|
}
|
|
|
|
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_setup_rsn_ie(struct ieee80211com *ic, u_int8_t *ie)
|
|
|
|
{
|
|
|
|
#define RSN_OUI_BYTES 0x00, 0x0f, 0xac
|
|
|
|
#define ADDSHORT(frm, v) do { \
|
|
|
|
frm[0] = (v) & 0xff; \
|
|
|
|
frm[1] = (v) >> 8; \
|
|
|
|
frm += 2; \
|
|
|
|
} while (0)
|
|
|
|
#define ADDSELECTOR(frm, sel) do { \
|
|
|
|
memcpy(frm, sel, 4); \
|
|
|
|
frm += 4; \
|
|
|
|
} while (0)
|
|
|
|
static const u_int8_t cipher_suite[][4] = {
|
|
|
|
{ RSN_OUI_BYTES, RSN_CSE_WEP40 }, /* NB: 40-bit */
|
|
|
|
{ RSN_OUI_BYTES, RSN_CSE_TKIP },
|
|
|
|
{ RSN_OUI_BYTES, RSN_CSE_WRAP },
|
|
|
|
{ RSN_OUI_BYTES, RSN_CSE_CCMP },
|
|
|
|
{ 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */
|
|
|
|
{ RSN_OUI_BYTES, RSN_CSE_NULL },
|
|
|
|
};
|
|
|
|
static const u_int8_t wep104_suite[4] =
|
|
|
|
{ RSN_OUI_BYTES, RSN_CSE_WEP104 };
|
|
|
|
static const u_int8_t key_mgt_unspec[4] =
|
|
|
|
{ RSN_OUI_BYTES, RSN_ASE_8021X_UNSPEC };
|
|
|
|
static const u_int8_t key_mgt_psk[4] =
|
|
|
|
{ RSN_OUI_BYTES, RSN_ASE_8021X_PSK };
|
|
|
|
const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn;
|
|
|
|
u_int8_t *frm = ie;
|
|
|
|
u_int8_t *selcnt;
|
|
|
|
|
|
|
|
*frm++ = IEEE80211_ELEMID_RSN;
|
|
|
|
*frm++ = 0; /* length filled in below */
|
|
|
|
ADDSHORT(frm, RSN_VERSION);
|
|
|
|
|
|
|
|
/* XXX filter out CKIP */
|
|
|
|
|
|
|
|
/* multicast cipher */
|
|
|
|
if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP &&
|
|
|
|
rsn->rsn_mcastkeylen >= 13)
|
|
|
|
ADDSELECTOR(frm, wep104_suite);
|
|
|
|
else
|
|
|
|
ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]);
|
|
|
|
|
|
|
|
/* unicast cipher list */
|
|
|
|
selcnt = frm;
|
|
|
|
ADDSHORT(frm, 0); /* selector count */
|
|
|
|
if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]);
|
|
|
|
}
|
|
|
|
if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* authenticator selector list */
|
|
|
|
selcnt = frm;
|
|
|
|
ADDSHORT(frm, 0); /* selector count */
|
|
|
|
if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, key_mgt_unspec);
|
|
|
|
}
|
|
|
|
if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) {
|
|
|
|
selcnt[0]++;
|
|
|
|
ADDSELECTOR(frm, key_mgt_psk);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* optional capabilities */
|
2005-06-07 00:08:48 +00:00
|
|
|
ADDSHORT(frm, rsn->rsn_caps);
|
2004-12-08 17:26:47 +00:00
|
|
|
/* XXX PMKID */
|
|
|
|
|
|
|
|
/* calculate element length */
|
|
|
|
ie[1] = frm - ie - 2;
|
|
|
|
KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa),
|
2004-12-08 22:34:07 +00:00
|
|
|
("RSN IE too big, %u > %zu",
|
2004-12-08 17:26:47 +00:00
|
|
|
ie[1]+2, sizeof(struct ieee80211_ie_wpa)));
|
|
|
|
return frm;
|
|
|
|
#undef ADDSELECTOR
|
|
|
|
#undef ADDSHORT
|
|
|
|
#undef RSN_OUI_BYTES
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a WPA/RSN element to a frame.
|
|
|
|
*/
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_add_wpa(u_int8_t *frm, struct ieee80211com *ic)
|
|
|
|
{
|
|
|
|
|
|
|
|
KASSERT(ic->ic_flags & IEEE80211_F_WPA, ("no WPA/RSN!"));
|
|
|
|
if (ic->ic_flags & IEEE80211_F_WPA2)
|
|
|
|
frm = ieee80211_setup_rsn_ie(ic, frm);
|
|
|
|
if (ic->ic_flags & IEEE80211_F_WPA1)
|
|
|
|
frm = ieee80211_setup_wpa_ie(ic, frm);
|
|
|
|
return frm;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define WME_OUI_BYTES 0x00, 0x50, 0xf2
|
|
|
|
/*
|
|
|
|
* Add a WME information element to a frame.
|
|
|
|
*/
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_add_wme_info(u_int8_t *frm, struct ieee80211_wme_state *wme)
|
|
|
|
{
|
|
|
|
static const struct ieee80211_wme_info info = {
|
|
|
|
.wme_id = IEEE80211_ELEMID_VENDOR,
|
|
|
|
.wme_len = sizeof(struct ieee80211_wme_info) - 2,
|
|
|
|
.wme_oui = { WME_OUI_BYTES },
|
|
|
|
.wme_type = WME_OUI_TYPE,
|
|
|
|
.wme_subtype = WME_INFO_OUI_SUBTYPE,
|
|
|
|
.wme_version = WME_VERSION,
|
|
|
|
.wme_info = 0,
|
|
|
|
};
|
|
|
|
memcpy(frm, &info, sizeof(info));
|
|
|
|
return frm + sizeof(info);
|
2003-06-23 16:55:01 +00:00
|
|
|
}
|
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
/*
|
|
|
|
* Add a WME parameters element to a frame.
|
|
|
|
*/
|
|
|
|
static u_int8_t *
|
|
|
|
ieee80211_add_wme_param(u_int8_t *frm, struct ieee80211_wme_state *wme)
|
|
|
|
{
|
|
|
|
#define SM(_v, _f) (((_v) << _f##_S) & _f)
|
|
|
|
#define ADDSHORT(frm, v) do { \
|
|
|
|
frm[0] = (v) & 0xff; \
|
|
|
|
frm[1] = (v) >> 8; \
|
|
|
|
frm += 2; \
|
|
|
|
} while (0)
|
|
|
|
/* NB: this works 'cuz a param has an info at the front */
|
|
|
|
static const struct ieee80211_wme_info param = {
|
|
|
|
.wme_id = IEEE80211_ELEMID_VENDOR,
|
|
|
|
.wme_len = sizeof(struct ieee80211_wme_param) - 2,
|
|
|
|
.wme_oui = { WME_OUI_BYTES },
|
|
|
|
.wme_type = WME_OUI_TYPE,
|
|
|
|
.wme_subtype = WME_PARAM_OUI_SUBTYPE,
|
|
|
|
.wme_version = WME_VERSION,
|
|
|
|
};
|
|
|
|
int i;
|
|
|
|
|
|
|
|
memcpy(frm, ¶m, sizeof(param));
|
|
|
|
frm += __offsetof(struct ieee80211_wme_info, wme_info);
|
|
|
|
*frm++ = wme->wme_bssChanParams.cap_info; /* AC info */
|
|
|
|
*frm++ = 0; /* reserved field */
|
|
|
|
for (i = 0; i < WME_NUM_AC; i++) {
|
|
|
|
const struct wmeParams *ac =
|
|
|
|
&wme->wme_bssChanParams.cap_wmeParams[i];
|
|
|
|
*frm++ = SM(i, WME_PARAM_ACI)
|
|
|
|
| SM(ac->wmep_acm, WME_PARAM_ACM)
|
|
|
|
| SM(ac->wmep_aifsn, WME_PARAM_AIFSN)
|
|
|
|
;
|
|
|
|
*frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX)
|
|
|
|
| SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN)
|
|
|
|
;
|
|
|
|
ADDSHORT(frm, ac->wmep_txopLimit);
|
|
|
|
}
|
|
|
|
return frm;
|
|
|
|
#undef SM
|
|
|
|
#undef ADDSHORT
|
|
|
|
}
|
|
|
|
#undef WME_OUI_BYTES
|
|
|
|
|
2005-07-22 21:11:26 +00:00
|
|
|
/*
|
|
|
|
* Send a probe request frame with the specified ssid
|
|
|
|
* and any optional information element data.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
ieee80211_send_probereq(struct ieee80211_node *ni,
|
|
|
|
const u_int8_t sa[IEEE80211_ADDR_LEN],
|
|
|
|
const u_int8_t da[IEEE80211_ADDR_LEN],
|
|
|
|
const u_int8_t bssid[IEEE80211_ADDR_LEN],
|
|
|
|
const u_int8_t *ssid, size_t ssidlen,
|
|
|
|
const void *optie, size_t optielen)
|
|
|
|
{
|
|
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
struct ieee80211_frame *wh;
|
2006-12-27 18:46:18 +00:00
|
|
|
const struct ieee80211_rateset *rs;
|
2005-07-22 21:11:26 +00:00
|
|
|
struct mbuf *m;
|
|
|
|
u_int8_t *frm;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Hold a reference on the node so it doesn't go away until after
|
|
|
|
* the xmit is complete all the way in the driver. On error we
|
|
|
|
* will remove our reference.
|
|
|
|
*/
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
|
|
|
"ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
|
|
|
|
__func__, __LINE__,
|
|
|
|
ni, ether_sprintf(ni->ni_macaddr),
|
|
|
|
ieee80211_node_refcnt(ni)+1);
|
|
|
|
ieee80211_ref_node(ni);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* prreq frame format
|
|
|
|
* [tlv] ssid
|
|
|
|
* [tlv] supported rates
|
|
|
|
* [tlv] extended supported rates
|
|
|
|
* [tlv] user-specified ie's
|
|
|
|
*/
|
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
|
|
2 + IEEE80211_NWID_LEN
|
|
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
|
|
+ (optie != NULL ? optielen : 0)
|
|
|
|
);
|
|
|
|
if (m == NULL) {
|
|
|
|
ic->ic_stats.is_tx_nobuf++;
|
|
|
|
ieee80211_free_node(ni);
|
|
|
|
return ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
frm = ieee80211_add_ssid(frm, ssid, ssidlen);
|
2006-12-27 18:46:18 +00:00
|
|
|
rs = ieee80211_get_suprates(ic, ic->ic_curchan);
|
|
|
|
frm = ieee80211_add_rates(frm, rs);
|
|
|
|
frm = ieee80211_add_xrates(frm, rs);
|
2005-07-22 21:11:26 +00:00
|
|
|
|
|
|
|
if (optie != NULL) {
|
|
|
|
memcpy(frm, optie, optielen);
|
|
|
|
frm += optielen;
|
|
|
|
}
|
|
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
|
|
|
|
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
|
|
|
|
if (m == NULL)
|
|
|
|
return ENOMEM;
|
|
|
|
KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
|
|
|
|
m->m_pkthdr.rcvif = (void *)ni;
|
|
|
|
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
ieee80211_send_setup(ic, ni, wh,
|
|
|
|
IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
|
|
|
|
sa, da, bssid);
|
|
|
|
/* XXX power management? */
|
|
|
|
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_probereq);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_mgmt);
|
|
|
|
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
|
|
|
|
"[%s] send probe req on channel %u\n",
|
|
|
|
ether_sprintf(wh->i_addr1),
|
2005-08-10 16:22:30 +00:00
|
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan));
|
2005-07-22 21:11:26 +00:00
|
|
|
|
|
|
|
IF_ENQUEUE(&ic->ic_mgtq, m);
|
|
|
|
if_start(ic->ic_ifp);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-02-25 05:36:43 +00:00
|
|
|
/*
|
|
|
|
* Calculate capability information for mgt frames.
|
|
|
|
*/
|
|
|
|
static u_int16_t
|
|
|
|
getcapinfo(struct ieee80211com *ic, struct ieee80211_channel *chan)
|
|
|
|
{
|
|
|
|
u_int16_t capinfo;
|
|
|
|
|
|
|
|
KASSERT(ic->ic_opmode != IEEE80211_M_STA, ("station mode"));
|
|
|
|
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
|
|
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
|
|
else if (ic->ic_opmode == IEEE80211_M_IBSS)
|
|
|
|
capinfo = IEEE80211_CAPINFO_IBSS;
|
|
|
|
else
|
|
|
|
capinfo = 0;
|
|
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
|
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
|
|
IEEE80211_IS_CHAN_2GHZ(chan))
|
|
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
|
|
if (ic->ic_flags & IEEE80211_F_SHSLOT)
|
|
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
|
|
return capinfo;
|
|
|
|
}
|
|
|
|
|
2003-08-19 22:17:04 +00:00
|
|
|
/*
|
|
|
|
* Send a management frame. The node is for the destination (or ic_bss
|
|
|
|
* when in station mode). Nodes other than ic_bss have their reference
|
|
|
|
* count bumped to reflect our use for an indeterminant time.
|
|
|
|
*/
|
2003-06-23 16:55:01 +00:00
|
|
|
int
|
|
|
|
ieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni,
|
|
|
|
int type, int arg)
|
|
|
|
{
|
2003-10-17 23:15:30 +00:00
|
|
|
#define senderr(_x, _v) do { ic->ic_stats._v++; ret = _x; goto bad; } while (0)
|
2003-06-23 16:55:01 +00:00
|
|
|
struct mbuf *m;
|
|
|
|
u_int8_t *frm;
|
|
|
|
u_int16_t capinfo;
|
2004-12-08 17:26:47 +00:00
|
|
|
int has_challenge, is_shared_key, ret, timer, status;
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2003-08-19 22:17:04 +00:00
|
|
|
KASSERT(ni != NULL, ("null node"));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Hold a reference on the node so it doesn't go away until after
|
|
|
|
* the xmit is complete all the way in the driver. On error we
|
|
|
|
* will remove our reference.
|
|
|
|
*/
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
|
2005-01-24 20:50:20 +00:00
|
|
|
"ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
|
2004-12-08 17:26:47 +00:00
|
|
|
__func__, __LINE__,
|
2005-01-24 20:50:20 +00:00
|
|
|
ni, ether_sprintf(ni->ni_macaddr),
|
|
|
|
ieee80211_node_refcnt(ni)+1);
|
2004-12-08 17:26:47 +00:00
|
|
|
ieee80211_ref_node(ni);
|
|
|
|
|
2003-06-23 16:55:01 +00:00
|
|
|
timer = 0;
|
|
|
|
switch (type) {
|
|
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
|
|
|
|
/*
|
|
|
|
* probe response frame format
|
|
|
|
* [8] time stamp
|
|
|
|
* [2] beacon interval
|
|
|
|
* [2] cabability information
|
|
|
|
* [tlv] ssid
|
|
|
|
* [tlv] supported rates
|
2003-10-17 22:09:20 +00:00
|
|
|
* [tlv] parameter set (FH/DS)
|
2003-06-23 16:55:01 +00:00
|
|
|
* [tlv] parameter set (IBSS)
|
2004-12-08 17:26:47 +00:00
|
|
|
* [tlv] extended rate phy (ERP)
|
2003-06-23 16:55:01 +00:00
|
|
|
* [tlv] extended supported rates
|
2004-12-08 17:26:47 +00:00
|
|
|
* [tlv] WPA
|
2005-03-26 07:11:31 +00:00
|
|
|
* [tlv] WME (optional)
|
2003-06-23 16:55:01 +00:00
|
|
|
*/
|
2004-12-08 17:26:47 +00:00
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
|
|
8
|
|
|
|
+ sizeof(u_int16_t)
|
|
|
|
+ sizeof(u_int16_t)
|
|
|
|
+ 2 + IEEE80211_NWID_LEN
|
2003-06-23 16:55:01 +00:00
|
|
|
+ 2 + IEEE80211_RATE_SIZE
|
2004-12-08 17:26:47 +00:00
|
|
|
+ 7 /* max(7,3) */
|
2003-06-23 16:55:01 +00:00
|
|
|
+ 6
|
2004-12-08 17:26:47 +00:00
|
|
|
+ 3
|
|
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
|
|
/* XXX !WPA1+WPA2 fits w/o a cluster */
|
|
|
|
+ (ic->ic_flags & IEEE80211_F_WPA ?
|
|
|
|
2*sizeof(struct ieee80211_ie_wpa) : 0)
|
2005-03-26 07:11:31 +00:00
|
|
|
+ sizeof(struct ieee80211_wme_param)
|
2004-12-08 17:26:47 +00:00
|
|
|
);
|
2003-06-23 16:55:01 +00:00
|
|
|
if (m == NULL)
|
2004-12-08 17:26:47 +00:00
|
|
|
senderr(ENOMEM, is_tx_nobuf);
|
2003-06-23 16:55:01 +00:00
|
|
|
|
|
|
|
memset(frm, 0, 8); /* timestamp should be filled later */
|
|
|
|
frm += 8;
|
|
|
|
*(u_int16_t *)frm = htole16(ic->ic_bss->ni_intval);
|
|
|
|
frm += 2;
|
2006-02-25 05:36:43 +00:00
|
|
|
capinfo = getcapinfo(ic, ic->ic_curchan);
|
2003-06-23 16:55:01 +00:00
|
|
|
*(u_int16_t *)frm = htole16(capinfo);
|
|
|
|
frm += 2;
|
|
|
|
|
|
|
|
frm = ieee80211_add_ssid(frm, ic->ic_bss->ni_essid,
|
|
|
|
ic->ic_bss->ni_esslen);
|
2004-12-08 17:26:47 +00:00
|
|
|
frm = ieee80211_add_rates(frm, &ni->ni_rates);
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2003-10-17 22:09:20 +00:00
|
|
|
if (ic->ic_phytype == IEEE80211_T_FH) {
|
|
|
|
*frm++ = IEEE80211_ELEMID_FHPARMS;
|
|
|
|
*frm++ = 5;
|
|
|
|
*frm++ = ni->ni_fhdwell & 0x00ff;
|
|
|
|
*frm++ = (ni->ni_fhdwell >> 8) & 0x00ff;
|
|
|
|
*frm++ = IEEE80211_FH_CHANSET(
|
2005-08-10 16:22:30 +00:00
|
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan));
|
2003-10-17 22:09:20 +00:00
|
|
|
*frm++ = IEEE80211_FH_CHANPAT(
|
2005-08-10 16:22:30 +00:00
|
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan));
|
2003-10-17 22:09:20 +00:00
|
|
|
*frm++ = ni->ni_fhindex;
|
|
|
|
} else {
|
|
|
|
*frm++ = IEEE80211_ELEMID_DSPARMS;
|
|
|
|
*frm++ = 1;
|
2005-08-10 16:22:30 +00:00
|
|
|
*frm++ = ieee80211_chan2ieee(ic, ic->ic_curchan);
|
2003-10-17 22:09:20 +00:00
|
|
|
}
|
|
|
|
|
2003-06-23 16:55:01 +00:00
|
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS) {
|
|
|
|
*frm++ = IEEE80211_ELEMID_IBSSPARMS;
|
|
|
|
*frm++ = 2;
|
|
|
|
*frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
|
|
|
|
}
|
2004-12-08 17:26:47 +00:00
|
|
|
if (ic->ic_flags & IEEE80211_F_WPA)
|
|
|
|
frm = ieee80211_add_wpa(frm, ic);
|
|
|
|
if (ic->ic_curmode == IEEE80211_MODE_11G)
|
|
|
|
frm = ieee80211_add_erp(frm, ic);
|
|
|
|
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
|
2005-03-26 07:11:31 +00:00
|
|
|
if (ic->ic_flags & IEEE80211_F_WME)
|
|
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
2003-06-23 16:55:01 +00:00
|
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IEEE80211_FC0_SUBTYPE_AUTH:
|
2004-12-08 17:26:47 +00:00
|
|
|
status = arg >> 16;
|
|
|
|
arg &= 0xffff;
|
|
|
|
has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
|
|
|
|
arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
|
|
|
|
ni->ni_challenge != NULL);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Deduce whether we're doing open authentication or
|
|
|
|
* shared key authentication. We do the latter if
|
|
|
|
* we're in the middle of a shared key authentication
|
|
|
|
* handshake or if we're initiating an authentication
|
|
|
|
* request and configured to use shared key.
|
|
|
|
*/
|
|
|
|
is_shared_key = has_challenge ||
|
|
|
|
arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
|
|
|
|
(arg == IEEE80211_AUTH_SHARED_REQUEST &&
|
|
|
|
ic->ic_bss->ni_authmode == IEEE80211_AUTH_SHARED);
|
|
|
|
|
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
|
|
3 * sizeof(u_int16_t)
|
|
|
|
+ (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
|
|
|
|
sizeof(u_int16_t)+IEEE80211_CHALLENGE_LEN : 0)
|
|
|
|
);
|
2003-06-23 16:55:01 +00:00
|
|
|
if (m == NULL)
|
2004-12-08 17:26:47 +00:00
|
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
|
|
|
|
((u_int16_t *)frm)[0] =
|
|
|
|
(is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
|
|
|
|
: htole16(IEEE80211_AUTH_ALG_OPEN);
|
2003-06-23 16:55:01 +00:00
|
|
|
((u_int16_t *)frm)[1] = htole16(arg); /* sequence number */
|
2004-12-08 17:26:47 +00:00
|
|
|
((u_int16_t *)frm)[2] = htole16(status);/* status */
|
|
|
|
|
|
|
|
if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
|
|
|
|
((u_int16_t *)frm)[3] =
|
|
|
|
htole16((IEEE80211_CHALLENGE_LEN << 8) |
|
|
|
|
IEEE80211_ELEMID_CHALLENGE);
|
|
|
|
memcpy(&((u_int16_t *)frm)[4], ni->ni_challenge,
|
|
|
|
IEEE80211_CHALLENGE_LEN);
|
|
|
|
m->m_pkthdr.len = m->m_len =
|
|
|
|
4 * sizeof(u_int16_t) + IEEE80211_CHALLENGE_LEN;
|
|
|
|
if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH,
|
|
|
|
"[%s] request encrypt frame (%s)\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr), __func__);
|
|
|
|
m->m_flags |= M_LINK0; /* WEP-encrypt, please */
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
m->m_pkthdr.len = m->m_len = 3 * sizeof(u_int16_t);
|
|
|
|
|
|
|
|
/* XXX not right for shared key */
|
|
|
|
if (status == IEEE80211_STATUS_SUCCESS)
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_auth);
|
|
|
|
else
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_auth_fail);
|
|
|
|
|
2003-06-23 16:55:01 +00:00
|
|
|
if (ic->ic_opmode == IEEE80211_M_STA)
|
|
|
|
timer = IEEE80211_TRANS_WAIT;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH,
|
|
|
|
"[%s] send station deauthenticate (reason %d)\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr), arg);
|
|
|
|
m = ieee80211_getmgtframe(&frm, sizeof(u_int16_t));
|
2003-06-23 16:55:01 +00:00
|
|
|
if (m == NULL)
|
2004-12-08 17:26:47 +00:00
|
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
*(u_int16_t *)frm = htole16(arg); /* reason */
|
|
|
|
m->m_pkthdr.len = m->m_len = sizeof(u_int16_t);
|
|
|
|
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_deauth);
|
|
|
|
IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
|
|
|
|
|
2005-07-22 17:36:12 +00:00
|
|
|
ieee80211_node_unauthorize(ni); /* port closed */
|
2003-06-23 16:55:01 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
|
|
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
|
|
|
|
/*
|
|
|
|
* asreq frame format
|
|
|
|
* [2] capability information
|
|
|
|
* [2] listen interval
|
|
|
|
* [6*] current AP address (reassoc only)
|
|
|
|
* [tlv] ssid
|
|
|
|
* [tlv] supported rates
|
|
|
|
* [tlv] extended supported rates
|
2004-12-08 17:26:47 +00:00
|
|
|
* [tlv] WME
|
|
|
|
* [tlv] user-specified ie's
|
2003-06-23 16:55:01 +00:00
|
|
|
*/
|
2004-12-08 17:26:47 +00:00
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
|
|
sizeof(u_int16_t)
|
2003-06-23 16:55:01 +00:00
|
|
|
+ sizeof(u_int16_t)
|
|
|
|
+ IEEE80211_ADDR_LEN
|
2004-12-08 17:26:47 +00:00
|
|
|
+ 2 + IEEE80211_NWID_LEN
|
2003-06-23 16:55:01 +00:00
|
|
|
+ 2 + IEEE80211_RATE_SIZE
|
2004-12-08 17:26:47 +00:00
|
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
|
|
+ sizeof(struct ieee80211_wme_info)
|
|
|
|
+ (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0)
|
|
|
|
);
|
2003-06-23 16:55:01 +00:00
|
|
|
if (m == NULL)
|
2004-12-08 17:26:47 +00:00
|
|
|
senderr(ENOMEM, is_tx_nobuf);
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2006-02-25 05:36:43 +00:00
|
|
|
KASSERT(ic->ic_opmode == IEEE80211_M_STA,
|
|
|
|
("wrong mode %u", ic->ic_opmode));
|
|
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
2004-12-08 17:26:47 +00:00
|
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
2003-06-23 16:55:01 +00:00
|
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
2003-09-14 22:34:24 +00:00
|
|
|
/*
|
|
|
|
* NB: Some 11a AP's reject the request when
|
|
|
|
* short premable is set.
|
|
|
|
*/
|
|
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
2005-08-10 16:22:30 +00:00
|
|
|
IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
|
2003-06-23 16:55:01 +00:00
|
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
2004-12-08 17:26:47 +00:00
|
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) &&
|
|
|
|
(ic->ic_caps & IEEE80211_C_SHSLOT))
|
2003-06-23 16:55:01 +00:00
|
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
|
|
*(u_int16_t *)frm = htole16(capinfo);
|
|
|
|
frm += 2;
|
|
|
|
|
|
|
|
*(u_int16_t *)frm = htole16(ic->ic_lintval);
|
|
|
|
frm += 2;
|
|
|
|
|
|
|
|
if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
|
|
|
|
IEEE80211_ADDR_COPY(frm, ic->ic_bss->ni_bssid);
|
|
|
|
frm += IEEE80211_ADDR_LEN;
|
|
|
|
}
|
|
|
|
|
|
|
|
frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
|
|
|
|
frm = ieee80211_add_rates(frm, &ni->ni_rates);
|
|
|
|
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
|
2004-12-08 17:26:47 +00:00
|
|
|
if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL)
|
|
|
|
frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
|
|
|
|
if (ic->ic_opt_ie != NULL) {
|
|
|
|
memcpy(frm, ic->ic_opt_ie, ic->ic_opt_ie_len);
|
|
|
|
frm += ic->ic_opt_ie_len;
|
|
|
|
}
|
2003-06-23 16:55:01 +00:00
|
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
|
|
|
|
|
|
timer = IEEE80211_TRANS_WAIT;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
|
|
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
|
|
|
|
/*
|
|
|
|
* asreq frame format
|
|
|
|
* [2] capability information
|
|
|
|
* [2] status
|
|
|
|
* [2] association ID
|
|
|
|
* [tlv] supported rates
|
|
|
|
* [tlv] extended supported rates
|
2004-12-08 17:26:47 +00:00
|
|
|
* [tlv] WME (if enabled and STA enabled)
|
2003-06-23 16:55:01 +00:00
|
|
|
*/
|
2004-12-08 17:26:47 +00:00
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
|
|
sizeof(u_int16_t)
|
2003-06-23 16:55:01 +00:00
|
|
|
+ sizeof(u_int16_t)
|
|
|
|
+ sizeof(u_int16_t)
|
|
|
|
+ 2 + IEEE80211_RATE_SIZE
|
2004-12-08 17:26:47 +00:00
|
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
|
|
+ sizeof(struct ieee80211_wme_param)
|
|
|
|
);
|
2003-06-23 16:55:01 +00:00
|
|
|
if (m == NULL)
|
2004-12-08 17:26:47 +00:00
|
|
|
senderr(ENOMEM, is_tx_nobuf);
|
2003-06-23 16:55:01 +00:00
|
|
|
|
2006-02-25 05:36:43 +00:00
|
|
|
capinfo = getcapinfo(ic, ic->ic_curchan);
|
2003-06-23 16:55:01 +00:00
|
|
|
*(u_int16_t *)frm = htole16(capinfo);
|
|
|
|
frm += 2;
|
|
|
|
|
|
|
|
*(u_int16_t *)frm = htole16(arg); /* status */
|
|
|
|
frm += 2;
|
|
|
|
|
2004-12-08 17:26:47 +00:00
|
|
|
if (arg == IEEE80211_STATUS_SUCCESS) {
|
2003-06-23 16:55:01 +00:00
|
|
|
*(u_int16_t *)frm = htole16(ni->ni_associd);
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_NODE_STAT(ni, tx_assoc);
|
|
|
|
} else
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_assoc_fail);
|
2003-06-23 16:55:01 +00:00
|
|
|
frm += 2;
|
|
|
|
|
2003-08-19 22:17:04 +00:00
|
|
|
frm = ieee80211_add_rates(frm, &ni->ni_rates);
|
|
|
|
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
|
2004-12-08 17:26:47 +00:00
|
|
|
if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL)
|
|
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
2003-06-23 16:55:01 +00:00
|
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC:
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
|
|
|
|
"[%s] send station disassociate (reason %d)\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr), arg);
|
|
|
|
m = ieee80211_getmgtframe(&frm, sizeof(u_int16_t));
|
2003-06-23 16:55:01 +00:00
|
|
|
if (m == NULL)
|
2004-12-08 17:26:47 +00:00
|
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
*(u_int16_t *)frm = htole16(arg); /* reason */
|
|
|
|
m->m_pkthdr.len = m->m_len = sizeof(u_int16_t);
|
|
|
|
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_disassoc);
|
|
|
|
IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
|
2003-06-23 16:55:01 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2004-12-08 17:26:47 +00:00
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
|
|
|
|
"[%s] invalid mgmt frame type %u\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr), type);
|
2003-10-17 23:15:30 +00:00
|
|
|
senderr(EINVAL, is_tx_unknownmgt);
|
2003-08-19 22:17:04 +00:00
|
|
|
/* NOTREACHED */
|
2003-06-23 16:55:01 +00:00
|
|
|
}
|
2006-02-08 17:30:31 +00:00
|
|
|
ret = ieee80211_mgmt_output(ic, ni, m, type, timer);
|
|
|
|
if (ret != 0) {
|
2003-08-19 22:17:04 +00:00
|
|
|
bad:
|
2004-12-08 17:26:47 +00:00
|
|
|
ieee80211_free_node(ni);
|
2003-08-19 22:17:04 +00:00
|
|
|
}
|
2003-06-23 16:55:01 +00:00
|
|
|
return ret;
|
2003-08-19 22:17:04 +00:00
|
|
|
#undef senderr
|
2003-06-23 16:55:01 +00:00
|
|
|
}
|
2004-12-08 17:26:47 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate a beacon frame and fillin the appropriate bits.
|
|
|
|
*/
|
|
|
|
struct mbuf *
|
|
|
|
ieee80211_beacon_alloc(struct ieee80211com *ic, struct ieee80211_node *ni,
|
|
|
|
struct ieee80211_beacon_offsets *bo)
|
|
|
|
{
|
|
|
|
struct ifnet *ifp = ic->ic_ifp;
|
|
|
|
struct ieee80211_frame *wh;
|
|
|
|
struct mbuf *m;
|
|
|
|
int pktlen;
|
|
|
|
u_int8_t *frm, *efrm;
|
|
|
|
u_int16_t capinfo;
|
|
|
|
struct ieee80211_rateset *rs;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* beacon frame format
|
|
|
|
* [8] time stamp
|
|
|
|
* [2] beacon interval
|
|
|
|
* [2] cabability information
|
|
|
|
* [tlv] ssid
|
|
|
|
* [tlv] supported rates
|
|
|
|
* [3] parameter set (DS)
|
|
|
|
* [tlv] parameter set (IBSS/TIM)
|
|
|
|
* [tlv] extended rate phy (ERP)
|
|
|
|
* [tlv] extended supported rates
|
|
|
|
* [tlv] WME parameters
|
|
|
|
* [tlv] WPA/RSN parameters
|
|
|
|
* XXX Vendor-specific OIDs (e.g. Atheros)
|
|
|
|
* NB: we allocate the max space required for the TIM bitmap.
|
|
|
|
*/
|
|
|
|
rs = &ni->ni_rates;
|
|
|
|
pktlen = 8 /* time stamp */
|
|
|
|
+ sizeof(u_int16_t) /* beacon interval */
|
|
|
|
+ sizeof(u_int16_t) /* capabilities */
|
|
|
|
+ 2 + ni->ni_esslen /* ssid */
|
|
|
|
+ 2 + IEEE80211_RATE_SIZE /* supported rates */
|
|
|
|
+ 2 + 1 /* DS parameters */
|
|
|
|
+ 2 + 4 + ic->ic_tim_len /* DTIM/IBSSPARMS */
|
|
|
|
+ 2 + 1 /* ERP */
|
|
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
|
|
+ (ic->ic_caps & IEEE80211_C_WME ? /* WME */
|
|
|
|
sizeof(struct ieee80211_wme_param) : 0)
|
|
|
|
+ (ic->ic_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
|
|
|
|
2*sizeof(struct ieee80211_ie_wpa) : 0)
|
|
|
|
;
|
|
|
|
m = ieee80211_getmgtframe(&frm, pktlen);
|
|
|
|
if (m == NULL) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
|
|
|
|
"%s: cannot get buf; size %u\n", __func__, pktlen);
|
|
|
|
ic->ic_stats.is_tx_nobuf++;
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
|
|
|
|
frm += 8;
|
|
|
|
*(u_int16_t *)frm = htole16(ni->ni_intval);
|
|
|
|
frm += 2;
|
2006-02-25 05:36:43 +00:00
|
|
|
capinfo = getcapinfo(ic, ni->ni_chan);
|
2004-12-08 17:26:47 +00:00
|
|
|
bo->bo_caps = (u_int16_t *)frm;
|
|
|
|
*(u_int16_t *)frm = htole16(capinfo);
|
|
|
|
frm += 2;
|
|
|
|
*frm++ = IEEE80211_ELEMID_SSID;
|
|
|
|
if ((ic->ic_flags & IEEE80211_F_HIDESSID) == 0) {
|
|
|
|
*frm++ = ni->ni_esslen;
|
|
|
|
memcpy(frm, ni->ni_essid, ni->ni_esslen);
|
|
|
|
frm += ni->ni_esslen;
|
|
|
|
} else
|
|
|
|
*frm++ = 0;
|
|
|
|
frm = ieee80211_add_rates(frm, rs);
|
|
|
|
if (ic->ic_curmode != IEEE80211_MODE_FH) {
|
|
|
|
*frm++ = IEEE80211_ELEMID_DSPARMS;
|
|
|
|
*frm++ = 1;
|
|
|
|
*frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
|
|
|
|
}
|
|
|
|
bo->bo_tim = frm;
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS) {
|
|
|
|
*frm++ = IEEE80211_ELEMID_IBSSPARMS;
|
|
|
|
*frm++ = 2;
|
|
|
|
*frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
|
|
|
|
bo->bo_tim_len = 0;
|
2006-02-25 05:36:43 +00:00
|
|
|
} else if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
|
2004-12-08 17:26:47 +00:00
|
|
|
struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
|
|
|
|
|
|
|
|
tie->tim_ie = IEEE80211_ELEMID_TIM;
|
|
|
|
tie->tim_len = 4; /* length */
|
|
|
|
tie->tim_count = 0; /* DTIM count */
|
|
|
|
tie->tim_period = ic->ic_dtim_period; /* DTIM period */
|
|
|
|
tie->tim_bitctl = 0; /* bitmap control */
|
|
|
|
tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
|
|
|
|
frm += sizeof(struct ieee80211_tim_ie);
|
|
|
|
bo->bo_tim_len = 1;
|
|
|
|
}
|
|
|
|
bo->bo_trailer = frm;
|
|
|
|
if (ic->ic_flags & IEEE80211_F_WME) {
|
|
|
|
bo->bo_wme = frm;
|
|
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
2005-01-24 20:41:12 +00:00
|
|
|
ic->ic_flags &= ~IEEE80211_F_WMEUPDATE;
|
2004-12-08 17:26:47 +00:00
|
|
|
}
|
|
|
|
if (ic->ic_flags & IEEE80211_F_WPA)
|
|
|
|
frm = ieee80211_add_wpa(frm, ic);
|
2006-01-02 16:57:20 +00:00
|
|
|
if (ic->ic_curmode == IEEE80211_MODE_11G) {
|
|
|
|
bo->bo_erp = frm;
|
2004-12-08 17:26:47 +00:00
|
|
|
frm = ieee80211_add_erp(frm, ic);
|
2006-01-02 16:57:20 +00:00
|
|
|
}
|
2004-12-08 17:26:47 +00:00
|
|
|
efrm = ieee80211_add_xrates(frm, rs);
|
|
|
|
bo->bo_trailer_len = efrm - bo->bo_trailer;
|
|
|
|
m->m_pkthdr.len = m->m_len = efrm - mtod(m, u_int8_t *);
|
|
|
|
|
|
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
|
|
|
|
KASSERT(m != NULL, ("no space for 802.11 header?"));
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
|
|
|
|
IEEE80211_FC0_SUBTYPE_BEACON;
|
|
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
|
|
|
|
*(u_int16_t *)wh->i_dur = 0;
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
|
|
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
|
|
|
|
*(u_int16_t *)wh->i_seq = 0;
|
|
|
|
|
|
|
|
return m;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Update the dynamic parts of a beacon frame based on the current state.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
ieee80211_beacon_update(struct ieee80211com *ic, struct ieee80211_node *ni,
|
|
|
|
struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast)
|
|
|
|
{
|
|
|
|
int len_changed = 0;
|
|
|
|
u_int16_t capinfo;
|
|
|
|
|
|
|
|
IEEE80211_BEACON_LOCK(ic);
|
|
|
|
/* XXX faster to recalculate entirely or just changes? */
|
2006-02-25 05:36:43 +00:00
|
|
|
capinfo = getcapinfo(ic, ni->ni_chan);
|
2004-12-08 17:26:47 +00:00
|
|
|
*bo->bo_caps = htole16(capinfo);
|
|
|
|
|
|
|
|
if (ic->ic_flags & IEEE80211_F_WME) {
|
|
|
|
struct ieee80211_wme_state *wme = &ic->ic_wme;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check for agressive mode change. When there is
|
|
|
|
* significant high priority 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 (wme->wme_flags & WME_F_AGGRMODE) {
|
|
|
|
if (wme->wme_hipri_traffic >
|
|
|
|
wme->wme_hipri_switch_thresh) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
|
|
|
|
"%s: traffic %u, disable aggressive mode\n",
|
|
|
|
__func__, wme->wme_hipri_traffic);
|
|
|
|
wme->wme_flags &= ~WME_F_AGGRMODE;
|
|
|
|
ieee80211_wme_updateparams_locked(ic);
|
|
|
|
wme->wme_hipri_traffic =
|
|
|
|
wme->wme_hipri_switch_hysteresis;
|
|
|
|
} else
|
|
|
|
wme->wme_hipri_traffic = 0;
|
|
|
|
} else {
|
|
|
|
if (wme->wme_hipri_traffic <=
|
|
|
|
wme->wme_hipri_switch_thresh) {
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
|
|
|
|
"%s: traffic %u, enable aggressive mode\n",
|
|
|
|
__func__, wme->wme_hipri_traffic);
|
|
|
|
wme->wme_flags |= WME_F_AGGRMODE;
|
|
|
|
ieee80211_wme_updateparams_locked(ic);
|
|
|
|
wme->wme_hipri_traffic = 0;
|
|
|
|
} else
|
|
|
|
wme->wme_hipri_traffic =
|
|
|
|
wme->wme_hipri_switch_hysteresis;
|
|
|
|
}
|
|
|
|
if (ic->ic_flags & IEEE80211_F_WMEUPDATE) {
|
|
|
|
(void) ieee80211_add_wme_param(bo->bo_wme, wme);
|
|
|
|
ic->ic_flags &= ~IEEE80211_F_WMEUPDATE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* NB: no IBSS support*/
|
|
|
|
struct ieee80211_tim_ie *tie =
|
|
|
|
(struct ieee80211_tim_ie *) bo->bo_tim;
|
|
|
|
if (ic->ic_flags & IEEE80211_F_TIMUPDATE) {
|
|
|
|
u_int timlen, timoff, i;
|
|
|
|
/*
|
|
|
|
* ATIM/DTIM needs updating. If it fits in the
|
|
|
|
* current space allocated then just copy in the
|
|
|
|
* new bits. Otherwise we need to move any trailing
|
|
|
|
* data to make room. Note that we know there is
|
|
|
|
* contiguous space because ieee80211_beacon_allocate
|
|
|
|
* insures there is space in the mbuf to write a
|
|
|
|
* maximal-size virtual bitmap (based on ic_max_aid).
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
* Calculate the bitmap size and offset, copy any
|
|
|
|
* trailer out of the way, and then copy in the
|
|
|
|
* new bitmap and update the information element.
|
|
|
|
* Note that the tim bitmap must contain at least
|
|
|
|
* one byte and any offset must be even.
|
|
|
|
*/
|
|
|
|
if (ic->ic_ps_pending != 0) {
|
|
|
|
timoff = 128; /* impossibly large */
|
|
|
|
for (i = 0; i < ic->ic_tim_len; i++)
|
|
|
|
if (ic->ic_tim_bitmap[i]) {
|
|
|
|
timoff = i &~ 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
KASSERT(timoff != 128, ("tim bitmap empty!"));
|
|
|
|
for (i = ic->ic_tim_len-1; i >= timoff; i--)
|
|
|
|
if (ic->ic_tim_bitmap[i])
|
|
|
|
break;
|
|
|
|
timlen = 1 + (i - timoff);
|
|
|
|
} else {
|
|
|
|
timoff = 0;
|
|
|
|
timlen = 1;
|
|
|
|
}
|
|
|
|
if (timlen != bo->bo_tim_len) {
|
|
|
|
/* copy up/down trailer */
|
2006-01-02 16:57:20 +00:00
|
|
|
int adjust = tie->tim_bitmap+timlen
|
|
|
|
- bo->bo_trailer;
|
|
|
|
ovbcopy(bo->bo_trailer, bo->bo_trailer+adjust,
|
2004-12-08 17:26:47 +00:00
|
|
|
bo->bo_trailer_len);
|
2006-01-02 16:57:20 +00:00
|
|
|
bo->bo_trailer += adjust;
|
|
|
|
bo->bo_wme += adjust;
|
|
|
|
bo->bo_erp += adjust;
|
2004-12-08 17:26:47 +00:00
|
|
|
bo->bo_tim_len = timlen;
|
|
|
|
|
|
|
|
/* update information element */
|
|
|
|
tie->tim_len = 3 + timlen;
|
|
|
|
tie->tim_bitctl = timoff;
|
|
|
|
len_changed = 1;
|
|
|
|
}
|
|
|
|
memcpy(tie->tim_bitmap, ic->ic_tim_bitmap + timoff,
|
|
|
|
bo->bo_tim_len);
|
|
|
|
|
|
|
|
ic->ic_flags &= ~IEEE80211_F_TIMUPDATE;
|
|
|
|
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
|
|
|
|
"%s: TIM updated, pending %u, off %u, len %u\n",
|
|
|
|
__func__, ic->ic_ps_pending, timoff, timlen);
|
|
|
|
}
|
|
|
|
/* count down DTIM period */
|
|
|
|
if (tie->tim_count == 0)
|
|
|
|
tie->tim_count = tie->tim_period - 1;
|
|
|
|
else
|
|
|
|
tie->tim_count--;
|
|
|
|
/* update state for buffered multicast frames on DTIM */
|
2005-12-05 22:14:13 +00:00
|
|
|
if (mcast && tie->tim_count == 0)
|
2004-12-08 17:26:47 +00:00
|
|
|
tie->tim_bitctl |= 1;
|
|
|
|
else
|
|
|
|
tie->tim_bitctl &= ~1;
|
2006-01-02 16:57:20 +00:00
|
|
|
if (ic->ic_flags_ext & IEEE80211_FEXT_ERPUPDATE) {
|
|
|
|
/*
|
|
|
|
* ERP element needs updating.
|
|
|
|
*/
|
|
|
|
(void) ieee80211_add_erp(bo->bo_erp, ic);
|
|
|
|
ic->ic_flags_ext &= ~IEEE80211_FEXT_ERPUPDATE;
|
|
|
|
}
|
2004-12-08 17:26:47 +00:00
|
|
|
}
|
|
|
|
IEEE80211_BEACON_UNLOCK(ic);
|
|
|
|
|
|
|
|
return len_changed;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Save an outbound packet for a node in power-save sleep state.
|
|
|
|
* The new packet is placed on the node's saved queue, and the TIM
|
|
|
|
* is changed, if necessary.
|
|
|
|
*/
|
|
|
|
void
|
|
|
|
ieee80211_pwrsave(struct ieee80211com *ic, struct ieee80211_node *ni,
|
|
|
|
struct mbuf *m)
|
|
|
|
{
|
|
|
|
int qlen, age;
|
|
|
|
|
|
|
|
IEEE80211_NODE_SAVEQ_LOCK(ni);
|
|
|
|
if (_IF_QFULL(&ni->ni_savedq)) {
|
|
|
|
_IF_DROP(&ni->ni_savedq);
|
|
|
|
IEEE80211_NODE_SAVEQ_UNLOCK(ni);
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
|
|
|
|
"[%s] pwr save q overflow, drops %d (size %d)\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr),
|
|
|
|
ni->ni_savedq.ifq_drops, IEEE80211_PS_MAX_QUEUE);
|
|
|
|
#ifdef IEEE80211_DEBUG
|
|
|
|
if (ieee80211_msg_dumppkts(ic))
|
|
|
|
ieee80211_dump_pkt(mtod(m, caddr_t), m->m_len, -1, -1);
|
|
|
|
#endif
|
|
|
|
m_freem(m);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Tag the frame with it's expiry time and insert
|
|
|
|
* it in the queue. The aging interval is 4 times
|
|
|
|
* the listen interval specified by the station.
|
|
|
|
* Frames that sit around too long are reclaimed
|
|
|
|
* using this information.
|
|
|
|
*/
|
|
|
|
/* XXX handle overflow? */
|
2005-08-08 03:30:57 +00:00
|
|
|
age = ((ni->ni_intval * ic->ic_bintval) << 2) / 1024; /* TU -> secs */
|
2004-12-08 17:26:47 +00:00
|
|
|
_IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age);
|
|
|
|
IEEE80211_NODE_SAVEQ_UNLOCK(ni);
|
|
|
|
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
|
2005-08-08 03:30:57 +00:00
|
|
|
"[%s] save frame with age %d, %u now queued\n",
|
|
|
|
ether_sprintf(ni->ni_macaddr), age, qlen);
|
2004-12-08 17:26:47 +00:00
|
|
|
|
|
|
|
if (qlen == 1)
|
2005-07-22 17:45:48 +00:00
|
|
|
ic->ic_set_tim(ni, 1);
|
2004-12-08 17:26:47 +00:00
|
|
|
}
|