c0c5a03a41
Noticed by: Coverity Prevent analysis tool
1613 lines
48 KiB
C
1613 lines
48 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2005 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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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 "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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#include <sys/socket.h>
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#include <net/bpf.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_llc.h>
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#include <net/if_media.h>
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#include <net/if_vlan_var.h>
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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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#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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#endif
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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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ieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni,
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struct mbuf *m, int type)
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{
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struct ifnet *ifp = ic->ic_ifp;
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struct ieee80211_frame *wh;
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KASSERT(ni != NULL, ("null node"));
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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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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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KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
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m->m_pkthdr.rcvif = (void *)ni;
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wh = mtod(m, struct ieee80211_frame *);
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wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | type;
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wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
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*(u_int16_t *)wh->i_dur = 0;
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*(u_int16_t *)wh->i_seq =
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htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT);
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ni->ni_txseqs[0]++;
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/*
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* Hack. When sending PROBE_REQ frames while scanning we
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* explicitly force a broadcast rather than (as before) clobber
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* ni_macaddr and ni_bssid. This is stopgap, we need a way
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* to communicate this directly rather than do something
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* implicit based on surrounding state.
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*/
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if (type == IEEE80211_FC0_SUBTYPE_PROBE_REQ &&
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(ic->ic_flags & IEEE80211_F_SCAN)) {
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IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
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IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
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IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr);
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} else {
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IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
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IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
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IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
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}
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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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#ifdef IEEE80211_DEBUG
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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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ieee80211_chan2ieee(ic, ni->ni_chan));
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}
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#endif
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IEEE80211_NODE_STAT(ni, tx_mgmt);
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IF_ENQUEUE(&ic->ic_mgtq, m);
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ifp->if_timer = 1;
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if_start(ifp);
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return 0;
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}
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/*
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* Send a null data frame to the specified node.
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*/
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int
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ieee80211_send_nulldata(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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struct ifnet *ifp = ic->ic_ifp;
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struct mbuf *m;
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struct ieee80211_frame *wh;
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MGETHDR(m, M_NOWAIT, MT_HEADER);
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if (m == NULL) {
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/* XXX debug msg */
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ic->ic_stats.is_tx_nobuf++;
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return ENOMEM;
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}
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m->m_pkthdr.rcvif = (void *) ieee80211_ref_node(ni);
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wh = mtod(m, struct ieee80211_frame *);
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wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA |
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IEEE80211_FC0_SUBTYPE_NODATA;
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*(u_int16_t *)wh->i_dur = 0;
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*(u_int16_t *)wh->i_seq =
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htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT);
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ni->ni_txseqs[0]++;
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/* XXX WDS */
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wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
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IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
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IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
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IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_myaddr);
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m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame);
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IEEE80211_NODE_STAT(ni, tx_data);
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IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */
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if_start(ifp);
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return 0;
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}
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/*
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* Assign priority to a frame based on any vlan tag assigned
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* to the station and/or any Diffserv setting in an IP header.
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* Finally, if an ACM policy is setup (in station mode) it's
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* applied.
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*/
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int
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ieee80211_classify(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_node *ni)
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{
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int v_wme_ac, d_wme_ac, ac;
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#ifdef INET
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struct ether_header *eh;
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#endif
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if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
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ac = WME_AC_BE;
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goto done;
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}
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/*
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* If node has a vlan tag then all traffic
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* to it must have a matching tag.
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*/
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v_wme_ac = 0;
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if (ni->ni_vlan != 0) {
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struct m_tag *mtag = VLAN_OUTPUT_TAG(ic->ic_ifp, m);
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if (mtag == NULL) {
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IEEE80211_NODE_STAT(ni, tx_novlantag);
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return 1;
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}
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if (EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag)) !=
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EVL_VLANOFTAG(ni->ni_vlan)) {
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IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
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return 1;
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}
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/* map vlan priority to AC */
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switch (EVL_PRIOFTAG(ni->ni_vlan)) {
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case 1:
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case 2:
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v_wme_ac = WME_AC_BK;
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break;
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case 0:
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case 3:
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v_wme_ac = WME_AC_BE;
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break;
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case 4:
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case 5:
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v_wme_ac = WME_AC_VI;
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break;
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case 6:
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case 7:
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v_wme_ac = WME_AC_VO;
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break;
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}
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}
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#ifdef INET
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eh = mtod(m, struct ether_header *);
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if (eh->ether_type == htons(ETHERTYPE_IP)) {
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const struct ip *ip = (struct ip *)
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(mtod(m, u_int8_t *) + sizeof (*eh));
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/*
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* IP frame, map the TOS field.
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*/
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switch (ip->ip_tos) {
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case 0x08:
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case 0x20:
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d_wme_ac = WME_AC_BK; /* background */
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break;
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case 0x28:
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case 0xa0:
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d_wme_ac = WME_AC_VI; /* video */
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break;
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case 0x30: /* voice */
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case 0xe0:
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case 0x88: /* XXX UPSD */
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case 0xb8:
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d_wme_ac = WME_AC_VO;
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break;
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default:
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d_wme_ac = WME_AC_BE;
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break;
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}
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} else {
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#endif /* INET */
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d_wme_ac = WME_AC_BE;
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#ifdef INET
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}
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#endif
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/*
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* Use highest priority AC.
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*/
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if (v_wme_ac > d_wme_ac)
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ac = v_wme_ac;
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else
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ac = d_wme_ac;
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/*
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* Apply ACM policy.
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*/
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if (ic->ic_opmode == IEEE80211_M_STA) {
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static const int acmap[4] = {
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WME_AC_BK, /* WME_AC_BE */
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WME_AC_BK, /* WME_AC_BK */
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WME_AC_BE, /* WME_AC_VI */
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WME_AC_VI, /* WME_AC_VO */
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};
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while (ac != WME_AC_BK &&
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ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
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ac = acmap[ac];
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}
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done:
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M_WME_SETAC(m, ac);
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return 0;
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}
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/*
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* Insure there is sufficient contiguous space to encapsulate the
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* 802.11 data frame. If room isn't already there, arrange for it.
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* Drivers and cipher modules assume we have done the necessary work
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* and fail rudely if they don't find the space they need.
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*/
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static struct mbuf *
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ieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize,
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struct ieee80211_key *key, struct mbuf *m)
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{
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#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
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int needed_space = hdrsize;
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if (key != NULL) {
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/* XXX belongs in crypto code? */
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needed_space += key->wk_cipher->ic_header;
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/* XXX frags */
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}
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/*
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* We know we are called just before stripping an Ethernet
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* header and prepending an LLC header. This means we know
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* there will be
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* sizeof(struct ether_header) - sizeof(struct llc)
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* bytes recovered to which we need additional space for the
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* 802.11 header and any crypto header.
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*/
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/* XXX check trailing space and copy instead? */
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if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
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struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type);
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if (n == NULL) {
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
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"%s: cannot expand storage\n", __func__);
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ic->ic_stats.is_tx_nobuf++;
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m_freem(m);
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return NULL;
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}
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KASSERT(needed_space <= MHLEN,
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("not enough room, need %u got %zu\n", needed_space, MHLEN));
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/*
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* Setup new mbuf to have leading space to prepend the
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* 802.11 header and any crypto header bits that are
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* required (the latter are added when the driver calls
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* back to ieee80211_crypto_encap to do crypto encapsulation).
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*/
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/* NB: must be first 'cuz it clobbers m_data */
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m_move_pkthdr(n, m);
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n->m_len = 0; /* NB: m_gethdr does not set */
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n->m_data += needed_space;
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/*
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* Pull up Ethernet header to create the expected layout.
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* We could use m_pullup but that's overkill (i.e. we don't
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* need the actual data) and it cannot fail so do it inline
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* for speed.
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*/
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/* NB: struct ether_header is known to be contiguous */
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n->m_len += sizeof(struct ether_header);
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m->m_len -= sizeof(struct ether_header);
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m->m_data += sizeof(struct ether_header);
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/*
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* Replace the head of the chain.
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*/
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n->m_next = m;
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m = n;
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}
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return m;
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#undef TO_BE_RECLAIMED
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}
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#define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none)
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/*
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* Return the transmit key to use in sending a unicast frame.
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* If a unicast key is set we use that. When no unicast key is set
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* we fall back to the default transmit key.
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*/
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static __inline struct ieee80211_key *
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ieee80211_crypto_getucastkey(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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if (KEY_UNDEFINED(ni->ni_ucastkey)) {
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if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
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KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey]))
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return NULL;
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return &ic->ic_nw_keys[ic->ic_def_txkey];
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} else {
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return &ni->ni_ucastkey;
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}
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}
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/*
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* Return the transmit key to use in sending a multicast frame.
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* Multicast traffic always uses the group key which is installed as
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* the default tx key.
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*/
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static __inline struct ieee80211_key *
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ieee80211_crypto_getmcastkey(struct ieee80211com *ic, struct ieee80211_node *ni)
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{
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if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
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KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey]))
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return NULL;
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return &ic->ic_nw_keys[ic->ic_def_txkey];
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}
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|
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/*
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* Encapsulate an outbound data frame. The mbuf chain is updated.
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* If an error is encountered NULL is returned. The caller is required
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* to provide a node reference and pullup the ethernet header in the
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* first mbuf.
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*/
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struct mbuf *
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ieee80211_encap(struct ieee80211com *ic, struct mbuf *m,
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struct ieee80211_node *ni)
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{
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struct ether_header eh;
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struct ieee80211_frame *wh;
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struct ieee80211_key *key;
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struct llc *llc;
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int hdrsize, datalen, addqos;
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KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
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memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header));
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/*
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* Insure space for additional headers. First identify
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* transmit key to use in calculating any buffer adjustments
|
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* required. This is also used below to do privacy
|
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* encapsulation work. Then calculate the 802.11 header
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* size and any padding required by the driver.
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*
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* Note key may be NULL if we fall back to the default
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* transmit key and that is not set. In that case the
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* buffer may not be expanded as needed by the cipher
|
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* routines, but they will/should discard it.
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*/
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if (ic->ic_flags & IEEE80211_F_PRIVACY) {
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if (ic->ic_opmode == IEEE80211_M_STA ||
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!IEEE80211_IS_MULTICAST(eh.ether_dhost))
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key = ieee80211_crypto_getucastkey(ic, ni);
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else
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key = ieee80211_crypto_getmcastkey(ic, ni);
|
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if (key == NULL && eh.ether_type != htons(ETHERTYPE_PAE)) {
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IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
|
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"[%s] no default transmit key (%s) deftxkey %u\n",
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ether_sprintf(eh.ether_dhost), __func__,
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ic->ic_def_txkey);
|
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ic->ic_stats.is_tx_nodefkey++;
|
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}
|
|
} else
|
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key = NULL;
|
|
/* XXX 4-address format */
|
|
/*
|
|
* 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)
|
|
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 */
|
|
goto bad;
|
|
}
|
|
|
|
/* NB: this could be optimized because of ieee80211_mbuf_adjust */
|
|
m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
|
|
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;
|
|
datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
|
|
|
|
M_PREPEND(m, hdrsize, M_DONTWAIT);
|
|
if (m == NULL) {
|
|
ic->ic_stats.is_tx_nobuf++;
|
|
goto bad;
|
|
}
|
|
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);
|
|
/*
|
|
* 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);
|
|
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;
|
|
case IEEE80211_M_MONITOR:
|
|
goto bad;
|
|
}
|
|
if (addqos) {
|
|
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 =
|
|
htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT);
|
|
ni->ni_txseqs[0]++;
|
|
}
|
|
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) &&
|
|
(ic->ic_opmode == IEEE80211_M_STA ?
|
|
!KEY_UNDEFINED(*key) : !KEY_UNDEFINED(ni->ni_ucastkey)))) {
|
|
wh->i_fc[1] |= IEEE80211_FC1_WEP;
|
|
/* XXX do fragmentation */
|
|
if (!ieee80211_crypto_enmic(ic, key, m)) {
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_data);
|
|
IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
|
|
|
|
return m;
|
|
bad:
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Add a supported rates element id to a frame.
|
|
*/
|
|
static u_int8_t *
|
|
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.
|
|
*/
|
|
static u_int8_t *
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Add an erp element to a frame.
|
|
*/
|
|
static u_int8_t *
|
|
ieee80211_add_erp(u_int8_t *frm, struct ieee80211com *ic)
|
|
{
|
|
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);
|
|
|
|
/* 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 */
|
|
if (rsn->rsn_caps != 0)
|
|
ADDSHORT(frm, rsn->rsn_caps);
|
|
|
|
/* calculate element length */
|
|
ie[1] = frm - ie - 2;
|
|
KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa),
|
|
("WPA IE too big, %u > %zu",
|
|
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 */
|
|
if (rsn->rsn_caps != 0)
|
|
ADDSHORT(frm, rsn->rsn_caps);
|
|
/* XXX PMKID */
|
|
|
|
/* calculate element length */
|
|
ie[1] = frm - ie - 2;
|
|
KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa),
|
|
("RSN IE too big, %u > %zu",
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
int
|
|
ieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni,
|
|
int type, int arg)
|
|
{
|
|
#define senderr(_x, _v) do { ic->ic_stats._v++; ret = _x; goto bad; } while (0)
|
|
struct mbuf *m;
|
|
u_int8_t *frm;
|
|
enum ieee80211_phymode mode;
|
|
u_int16_t capinfo;
|
|
int has_challenge, is_shared_key, ret, timer, status;
|
|
|
|
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.
|
|
*/
|
|
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);
|
|
|
|
timer = 0;
|
|
switch (type) {
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
|
|
/*
|
|
* prreq frame format
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [tlv] extended supported rates
|
|
* [tlv] WME (optional)
|
|
* [tlv] user-specified ie's
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
2 + IEEE80211_NWID_LEN
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ sizeof(struct ieee80211_wme_param)
|
|
+ (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
frm = ieee80211_add_ssid(frm, ic->ic_des_essid, ic->ic_des_esslen);
|
|
mode = ieee80211_chan2mode(ic, ni->ni_chan);
|
|
frm = ieee80211_add_rates(frm, &ic->ic_sup_rates[mode]);
|
|
frm = ieee80211_add_xrates(frm, &ic->ic_sup_rates[mode]);
|
|
if (ic->ic_flags & IEEE80211_F_WME)
|
|
frm = ieee80211_add_wme_param(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;
|
|
}
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_probereq);
|
|
if (ic->ic_opmode == IEEE80211_M_STA)
|
|
timer = IEEE80211_TRANS_WAIT;
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
|
|
/*
|
|
* probe response frame format
|
|
* [8] time stamp
|
|
* [2] beacon interval
|
|
* [2] cabability information
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [tlv] parameter set (FH/DS)
|
|
* [tlv] parameter set (IBSS)
|
|
* [tlv] extended rate phy (ERP)
|
|
* [tlv] extended supported rates
|
|
* [tlv] WPA
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
8
|
|
+ sizeof(u_int16_t)
|
|
+ sizeof(u_int16_t)
|
|
+ 2 + IEEE80211_NWID_LEN
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 7 /* max(7,3) */
|
|
+ 6
|
|
+ 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)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
memset(frm, 0, 8); /* timestamp should be filled later */
|
|
frm += 8;
|
|
*(u_int16_t *)frm = htole16(ic->ic_bss->ni_intval);
|
|
frm += 2;
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS)
|
|
capinfo = IEEE80211_CAPINFO_IBSS;
|
|
else
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
IEEE80211_IS_CHAN_2GHZ(ni->ni_chan))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
if (ic->ic_flags & IEEE80211_F_SHSLOT)
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
*(u_int16_t *)frm = htole16(capinfo);
|
|
frm += 2;
|
|
|
|
frm = ieee80211_add_ssid(frm, ic->ic_bss->ni_essid,
|
|
ic->ic_bss->ni_esslen);
|
|
frm = ieee80211_add_rates(frm, &ni->ni_rates);
|
|
|
|
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(
|
|
ieee80211_chan2ieee(ic, ni->ni_chan));
|
|
*frm++ = IEEE80211_FH_CHANPAT(
|
|
ieee80211_chan2ieee(ic, ni->ni_chan));
|
|
*frm++ = ni->ni_fhindex;
|
|
} else {
|
|
*frm++ = IEEE80211_ELEMID_DSPARMS;
|
|
*frm++ = 1;
|
|
*frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
|
|
}
|
|
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS) {
|
|
*frm++ = IEEE80211_ELEMID_IBSSPARMS;
|
|
*frm++ = 2;
|
|
*frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
|
|
}
|
|
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);
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_AUTH:
|
|
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)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
((u_int16_t *)frm)[0] =
|
|
(is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
|
|
: htole16(IEEE80211_AUTH_ALG_OPEN);
|
|
((u_int16_t *)frm)[1] = htole16(arg); /* sequence number */
|
|
((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);
|
|
|
|
/*
|
|
* When 802.1x is not in use mark the port
|
|
* authorized at this point so traffic can flow.
|
|
*/
|
|
if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
|
|
status == IEEE80211_STATUS_SUCCESS &&
|
|
ni->ni_authmode != IEEE80211_AUTH_8021X)
|
|
ieee80211_node_authorize(ic, ni);
|
|
if (ic->ic_opmode == IEEE80211_M_STA)
|
|
timer = IEEE80211_TRANS_WAIT;
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
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));
|
|
if (m == NULL)
|
|
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);
|
|
|
|
ieee80211_node_unauthorize(ic, ni); /* port closed */
|
|
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
|
|
* [tlv] WME
|
|
* [tlv] user-specified ie's
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
sizeof(u_int16_t)
|
|
+ sizeof(u_int16_t)
|
|
+ IEEE80211_ADDR_LEN
|
|
+ 2 + IEEE80211_NWID_LEN
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ sizeof(struct ieee80211_wme_info)
|
|
+ (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
capinfo = 0;
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS)
|
|
capinfo |= IEEE80211_CAPINFO_IBSS;
|
|
else /* IEEE80211_M_STA */
|
|
capinfo |= IEEE80211_CAPINFO_ESS;
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
/*
|
|
* NB: Some 11a AP's reject the request when
|
|
* short premable is set.
|
|
*/
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
IEEE80211_IS_CHAN_2GHZ(ni->ni_chan))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) &&
|
|
(ic->ic_caps & IEEE80211_C_SHSLOT))
|
|
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);
|
|
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;
|
|
}
|
|
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
|
|
* [tlv] WME (if enabled and STA enabled)
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
sizeof(u_int16_t)
|
|
+ sizeof(u_int16_t)
|
|
+ sizeof(u_int16_t)
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ sizeof(struct ieee80211_wme_param)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
IEEE80211_IS_CHAN_2GHZ(ni->ni_chan))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
if (ic->ic_flags & IEEE80211_F_SHSLOT)
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
*(u_int16_t *)frm = htole16(capinfo);
|
|
frm += 2;
|
|
|
|
*(u_int16_t *)frm = htole16(arg); /* status */
|
|
frm += 2;
|
|
|
|
if (arg == IEEE80211_STATUS_SUCCESS) {
|
|
*(u_int16_t *)frm = htole16(ni->ni_associd);
|
|
IEEE80211_NODE_STAT(ni, tx_assoc);
|
|
} else
|
|
IEEE80211_NODE_STAT(ni, tx_assoc_fail);
|
|
frm += 2;
|
|
|
|
frm = ieee80211_add_rates(frm, &ni->ni_rates);
|
|
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
|
|
if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL)
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC:
|
|
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));
|
|
if (m == NULL)
|
|
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);
|
|
break;
|
|
|
|
default:
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
|
|
"[%s] invalid mgmt frame type %u\n",
|
|
ether_sprintf(ni->ni_macaddr), type);
|
|
senderr(EINVAL, is_tx_unknownmgt);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
ret = ieee80211_mgmt_output(ic, ni, m, type);
|
|
if (ret == 0) {
|
|
if (timer)
|
|
ic->ic_mgt_timer = timer;
|
|
} else {
|
|
bad:
|
|
ieee80211_free_node(ni);
|
|
}
|
|
return ret;
|
|
#undef senderr
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS)
|
|
capinfo = IEEE80211_CAPINFO_IBSS;
|
|
else
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
IEEE80211_IS_CHAN_2GHZ(ni->ni_chan))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
if (ic->ic_flags & IEEE80211_F_SHSLOT)
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
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;
|
|
} else {
|
|
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);
|
|
ic->ic_flags &= ~IEEE80211_F_WMEUPDATE;
|
|
}
|
|
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);
|
|
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? */
|
|
if (ic->ic_opmode == IEEE80211_M_IBSS)
|
|
capinfo = IEEE80211_CAPINFO_IBSS;
|
|
else
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
if (ic->ic_flags & IEEE80211_F_PRIVACY)
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
IEEE80211_IS_CHAN_2GHZ(ni->ni_chan))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
if (ic->ic_flags & IEEE80211_F_SHSLOT)
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
*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 */
|
|
ovbcopy(bo->bo_trailer, tie->tim_bitmap+timlen,
|
|
bo->bo_trailer_len);
|
|
bo->bo_trailer = tie->tim_bitmap+timlen;
|
|
bo->bo_wme = bo->bo_trailer;
|
|
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 */
|
|
if (mcast && (tie->tim_count == 1 || tie->tim_period == 1))
|
|
tie->tim_bitctl |= 1;
|
|
else
|
|
tie->tim_bitctl &= ~1;
|
|
}
|
|
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? */
|
|
age = ((ni->ni_intval * ic->ic_lintval) << 2) / 1024; /* TU -> secs */
|
|
_IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age);
|
|
IEEE80211_NODE_SAVEQ_UNLOCK(ni);
|
|
|
|
IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
|
|
"[%s] save frame, %u now queued\n",
|
|
ether_sprintf(ni->ni_macaddr), qlen);
|
|
|
|
if (qlen == 1)
|
|
ic->ic_set_tim(ic, ni, 1);
|
|
}
|