This pattern is used in callbacks with void * data arguments and seems both relatively uncommon and relatively harmless. Silence the warning by casting through uintptr_t. This warning is on by default in Clang 11. Reviewed by: arichardson Obtained from: CheriBSD (partial) MFC after: 1 week Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D24425
4015 lines
116 KiB
C
4015 lines
116 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.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_var.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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#include <net80211/ieee80211_regdomain.h>
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#ifdef IEEE80211_SUPPORT_SUPERG
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#include <net80211/ieee80211_superg.h>
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#endif
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#ifdef IEEE80211_SUPPORT_TDMA
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#include <net80211/ieee80211_tdma.h>
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#endif
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#include <net80211/ieee80211_wds.h>
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#include <net80211/ieee80211_mesh.h>
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#include <net80211/ieee80211_vht.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#endif
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#ifdef INET
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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 INET6
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#include <netinet/ip6.h>
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#endif
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#include <security/mac/mac_framework.h>
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#define ETHER_HEADER_COPY(dst, src) \
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memcpy(dst, src, sizeof(struct ether_header))
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static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *,
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u_int hdrsize, u_int ciphdrsize, u_int mtu);
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static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int);
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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 ieee80211vap *vap, 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 (vap->iv_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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* Transmit a frame to the given destination on the given VAP.
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*
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* It's up to the caller to figure out the details of who this
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* is going to and resolving the node.
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*
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* This routine takes care of queuing it for power save,
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* A-MPDU state stuff, fast-frames state stuff, encapsulation
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* if required, then passing it up to the driver layer.
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*
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* This routine (for now) consumes the mbuf and frees the node
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* reference; it ideally will return a TX status which reflects
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* whether the mbuf was consumed or not, so the caller can
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* free the mbuf (if appropriate) and the node reference (again,
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* if appropriate.)
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*/
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int
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ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m,
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struct ieee80211_node *ni)
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{
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struct ieee80211com *ic = vap->iv_ic;
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struct ifnet *ifp = vap->iv_ifp;
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int mcast;
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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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* XXX lose WDS vap linkage?
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*/
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if (ieee80211_pwrsave(ni, m) != 0)
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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ieee80211_free_node(ni);
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/*
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* We queued it fine, so tell the upper layer
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* that we consumed it.
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*/
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return (0);
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}
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/* calculate priority so drivers can find the tx queue */
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if (ieee80211_classify(ni, m)) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
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ni->ni_macaddr, NULL,
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"%s", "classification failure");
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vap->iv_stats.is_tx_classify++;
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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m_freem(m);
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ieee80211_free_node(ni);
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/* XXX better status? */
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return (0);
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}
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/*
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* Stash the node pointer. Note that we do this after
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* any call to ieee80211_dwds_mcast because that code
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* uses any existing value for rcvif to identify the
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* interface it (might have been) received on.
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*/
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MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
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m->m_pkthdr.rcvif = (void *)ni;
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mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0;
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BPF_MTAP(ifp, m); /* 802.3 tx */
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/*
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* Check if A-MPDU tx aggregation is setup or if we
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* should try to enable it. The sta must be associated
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* with HT and A-MPDU enabled for use. When the policy
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* routine decides we should enable A-MPDU we issue an
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* ADDBA request and wait for a reply. The frame being
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* encapsulated will go out w/o using A-MPDU, or possibly
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* it might be collected by the driver and held/retransmit.
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* The default ic_ampdu_enable routine handles staggering
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* ADDBA requests in case the receiver NAK's us or we are
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* otherwise unable to establish a BA stream.
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*
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* Don't treat group-addressed frames as candidates for aggregation;
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* net80211 doesn't support 802.11aa-2012 and so group addressed
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* frames will always have sequence numbers allocated from the NON_QOS
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* TID.
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*/
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if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) &&
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(vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX)) {
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if ((m->m_flags & M_EAPOL) == 0 && (! mcast)) {
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int tid = WME_AC_TO_TID(M_WME_GETAC(m));
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struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid];
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ieee80211_txampdu_count_packet(tap);
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if (IEEE80211_AMPDU_RUNNING(tap)) {
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/*
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* Operational, mark frame for aggregation.
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*
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* XXX do tx aggregation here
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*/
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m->m_flags |= M_AMPDU_MPDU;
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} else if (!IEEE80211_AMPDU_REQUESTED(tap) &&
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ic->ic_ampdu_enable(ni, tap)) {
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/*
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* Not negotiated yet, request service.
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*/
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ieee80211_ampdu_request(ni, tap);
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/* XXX hold frame for reply? */
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}
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}
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}
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#ifdef IEEE80211_SUPPORT_SUPERG
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/*
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* Check for AMSDU/FF; queue for aggregation
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*
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* Note: we don't bother trying to do fast frames or
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* A-MSDU encapsulation for 802.3 drivers. Now, we
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* likely could do it for FF (because it's a magic
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* atheros tunnel LLC type) but I don't think we're going
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* to really need to. For A-MSDU we'd have to set the
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* A-MSDU QoS bit in the wifi header, so we just plain
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* can't do it.
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*
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* Strictly speaking, we could actually /do/ A-MSDU / FF
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* with A-MPDU together which for certain circumstances
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* is beneficial (eg A-MSDU of TCK ACKs.) However,
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* I'll ignore that for now so existing behaviour is maintained.
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* Later on it would be good to make "amsdu + ampdu" configurable.
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*/
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else if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
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if ((! mcast) && ieee80211_amsdu_tx_ok(ni)) {
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m = ieee80211_amsdu_check(ni, m);
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if (m == NULL) {
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/* NB: any ni ref held on stageq */
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: amsdu_check queued frame\n",
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__func__);
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return (0);
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}
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} else if ((! mcast) && IEEE80211_ATH_CAP(vap, ni,
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IEEE80211_NODE_FF)) {
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m = ieee80211_ff_check(ni, m);
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if (m == NULL) {
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/* NB: any ni ref held on stageq */
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
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"%s: ff_check queued frame\n",
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__func__);
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return (0);
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}
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}
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}
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#endif /* IEEE80211_SUPPORT_SUPERG */
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/*
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* Grab the TX lock - serialise the TX process from this
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* point (where TX state is being checked/modified)
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* through to driver queue.
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*/
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IEEE80211_TX_LOCK(ic);
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/*
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* XXX make the encap and transmit code a separate function
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* so things like the FF (and later A-MSDU) path can just call
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* it for flushed frames.
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*/
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if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
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/*
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* Encapsulate the packet in prep for transmission.
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*/
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m = ieee80211_encap(vap, ni, m);
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if (m == NULL) {
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/* NB: stat+msg handled in ieee80211_encap */
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IEEE80211_TX_UNLOCK(ic);
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ieee80211_free_node(ni);
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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return (ENOBUFS);
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}
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}
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(void) ieee80211_parent_xmitpkt(ic, m);
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/*
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* Unlock at this point - no need to hold it across
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* ieee80211_free_node() (ie, the comlock)
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*/
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IEEE80211_TX_UNLOCK(ic);
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ic->ic_lastdata = ticks;
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return (0);
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}
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/*
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* Send the given mbuf through the given vap.
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*
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* This consumes the mbuf regardless of whether the transmit
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* was successful or not.
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*
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* This does none of the initial checks that ieee80211_start()
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* does (eg CAC timeout, interface wakeup) - the caller must
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* do this first.
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*/
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static int
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ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m)
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{
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#define IS_DWDS(vap) \
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(vap->iv_opmode == IEEE80211_M_WDS && \
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(vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0)
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struct ieee80211com *ic = vap->iv_ic;
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struct ifnet *ifp = vap->iv_ifp;
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struct ieee80211_node *ni;
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struct ether_header *eh;
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/*
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* Cancel any background scan.
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*/
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if (ic->ic_flags & IEEE80211_F_SCAN)
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ieee80211_cancel_anyscan(vap);
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/*
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* Find the node for the destination so we can do
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* things like power save and fast frames aggregation.
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*
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* NB: past this point various code assumes the first
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* mbuf has the 802.3 header present (and contiguous).
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*/
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ni = NULL;
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if (m->m_len < sizeof(struct ether_header) &&
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(m = m_pullup(m, sizeof(struct ether_header))) == NULL) {
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
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"discard frame, %s\n", "m_pullup failed");
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vap->iv_stats.is_tx_nobuf++; /* XXX */
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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return (ENOBUFS);
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}
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eh = mtod(m, struct ether_header *);
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if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
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if (IS_DWDS(vap)) {
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/*
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* Only unicast frames from the above go out
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* DWDS vaps; multicast frames are handled by
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* dispatching the frame as it comes through
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* the AP vap (see below).
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*/
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS,
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eh->ether_dhost, "mcast", "%s", "on DWDS");
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vap->iv_stats.is_dwds_mcast++;
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m_freem(m);
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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/* XXX better status? */
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return (ENOBUFS);
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}
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if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
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/*
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* Spam DWDS vap's w/ multicast traffic.
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*/
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/* XXX only if dwds in use? */
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ieee80211_dwds_mcast(vap, m);
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}
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}
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#ifdef IEEE80211_SUPPORT_MESH
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if (vap->iv_opmode != IEEE80211_M_MBSS) {
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#endif
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ni = ieee80211_find_txnode(vap, eh->ether_dhost);
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if (ni == NULL) {
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/* NB: ieee80211_find_txnode does stat+msg */
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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m_freem(m);
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/* XXX better status? */
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return (ENOBUFS);
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}
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if (ni->ni_associd == 0 &&
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(ni->ni_flags & IEEE80211_NODE_ASSOCID)) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
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eh->ether_dhost, NULL,
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"sta not associated (type 0x%04x)",
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htons(eh->ether_type));
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vap->iv_stats.is_tx_notassoc++;
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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m_freem(m);
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ieee80211_free_node(ni);
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/* XXX better status? */
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return (ENOBUFS);
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|
}
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#ifdef IEEE80211_SUPPORT_MESH
|
|
} else {
|
|
if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) {
|
|
/*
|
|
* Proxy station only if configured.
|
|
*/
|
|
if (!ieee80211_mesh_isproxyena(vap)) {
|
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IEEE80211_DISCARD_MAC(vap,
|
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IEEE80211_MSG_OUTPUT |
|
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IEEE80211_MSG_MESH,
|
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eh->ether_dhost, NULL,
|
|
"%s", "proxy not enabled");
|
|
vap->iv_stats.is_mesh_notproxy++;
|
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
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m_freem(m);
|
|
/* XXX better status? */
|
|
return (ENOBUFS);
|
|
}
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
|
|
"forward frame from DS SA(%6D), DA(%6D)\n",
|
|
eh->ether_shost, ":",
|
|
eh->ether_dhost, ":");
|
|
ieee80211_mesh_proxy_check(vap, eh->ether_shost);
|
|
}
|
|
ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m);
|
|
if (ni == NULL) {
|
|
/*
|
|
* NB: ieee80211_mesh_discover holds/disposes
|
|
* frame (e.g. queueing on path discovery).
|
|
*/
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
/* XXX better status? */
|
|
return (ENOBUFS);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* We've resolved the sender, so attempt to transmit it.
|
|
*/
|
|
|
|
if (vap->iv_state == IEEE80211_S_SLEEP) {
|
|
/*
|
|
* In power save; queue frame and then wakeup device
|
|
* for transmit.
|
|
*/
|
|
ic->ic_lastdata = ticks;
|
|
if (ieee80211_pwrsave(ni, m) != 0)
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
ieee80211_free_node(ni);
|
|
ieee80211_new_state(vap, IEEE80211_S_RUN, 0);
|
|
return (0);
|
|
}
|
|
|
|
if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0)
|
|
return (ENOBUFS);
|
|
return (0);
|
|
#undef IS_DWDS
|
|
}
|
|
|
|
/*
|
|
* Start method for vap's. All packets from the stack come
|
|
* through here. We handle common processing of the packets
|
|
* before dispatching them to the underlying device.
|
|
*
|
|
* if_transmit() requires that the mbuf be consumed by this call
|
|
* regardless of the return condition.
|
|
*/
|
|
int
|
|
ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct ieee80211vap *vap = ifp->if_softc;
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
|
|
/*
|
|
* No data frames go out unless we're running.
|
|
* Note in particular this covers CAC and CSA
|
|
* states (though maybe we should check muting
|
|
* for CSA).
|
|
*/
|
|
if (vap->iv_state != IEEE80211_S_RUN &&
|
|
vap->iv_state != IEEE80211_S_SLEEP) {
|
|
IEEE80211_LOCK(ic);
|
|
/* re-check under the com lock to avoid races */
|
|
if (vap->iv_state != IEEE80211_S_RUN &&
|
|
vap->iv_state != IEEE80211_S_SLEEP) {
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
|
|
"%s: ignore queue, in %s state\n",
|
|
__func__, ieee80211_state_name[vap->iv_state]);
|
|
vap->iv_stats.is_tx_badstate++;
|
|
IEEE80211_UNLOCK(ic);
|
|
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
|
|
m_freem(m);
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
return (ENETDOWN);
|
|
}
|
|
IEEE80211_UNLOCK(ic);
|
|
}
|
|
|
|
/*
|
|
* Sanitize mbuf flags for net80211 use. We cannot
|
|
* clear M_PWR_SAV or M_MORE_DATA because these may
|
|
* be set for frames that are re-submitted from the
|
|
* power save queue.
|
|
*
|
|
* NB: This must be done before ieee80211_classify as
|
|
* it marks EAPOL in frames with M_EAPOL.
|
|
*/
|
|
m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA);
|
|
|
|
/*
|
|
* Bump to the packet transmission path.
|
|
* The mbuf will be consumed here.
|
|
*/
|
|
return (ieee80211_start_pkt(vap, m));
|
|
}
|
|
|
|
void
|
|
ieee80211_vap_qflush(struct ifnet *ifp)
|
|
{
|
|
|
|
/* Empty for now */
|
|
}
|
|
|
|
/*
|
|
* 802.11 raw output routine.
|
|
*
|
|
* XXX TODO: this (and other send routines) should correctly
|
|
* XXX keep the pwr mgmt bit set if it decides to call into the
|
|
* XXX driver to send a frame whilst the state is SLEEP.
|
|
*
|
|
* Otherwise the peer may decide that we're awake and flood us
|
|
* with traffic we are still too asleep to receive!
|
|
*/
|
|
int
|
|
ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
struct mbuf *m, const struct ieee80211_bpf_params *params)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
int error;
|
|
|
|
/*
|
|
* Set node - the caller has taken a reference, so ensure
|
|
* that the mbuf has the same node value that
|
|
* it would if it were going via the normal path.
|
|
*/
|
|
MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
|
|
m->m_pkthdr.rcvif = (void *)ni;
|
|
|
|
/*
|
|
* Attempt to add bpf transmit parameters.
|
|
*
|
|
* For now it's ok to fail; the raw_xmit api still takes
|
|
* them as an option.
|
|
*
|
|
* Later on when ic_raw_xmit() has params removed,
|
|
* they'll have to be added - so fail the transmit if
|
|
* they can't be.
|
|
*/
|
|
if (params)
|
|
(void) ieee80211_add_xmit_params(m, params);
|
|
|
|
error = ic->ic_raw_xmit(ni, m, params);
|
|
if (error) {
|
|
if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1);
|
|
ieee80211_free_node(ni);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
ieee80211_validate_frame(struct mbuf *m,
|
|
const struct ieee80211_bpf_params *params)
|
|
{
|
|
struct ieee80211_frame *wh;
|
|
int type;
|
|
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
|
|
return (EINVAL);
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
|
|
IEEE80211_FC0_VERSION_0)
|
|
return (EINVAL);
|
|
|
|
type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
|
|
if (type != IEEE80211_FC0_TYPE_DATA) {
|
|
if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) !=
|
|
IEEE80211_FC1_DIR_NODS)
|
|
return (EINVAL);
|
|
|
|
if (type != IEEE80211_FC0_TYPE_MGT &&
|
|
(wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) != 0)
|
|
return (EINVAL);
|
|
|
|
/* XXX skip other field checks? */
|
|
}
|
|
|
|
if ((params && (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0) ||
|
|
(wh->i_fc[1] & IEEE80211_FC1_PROTECTED) != 0) {
|
|
int subtype;
|
|
|
|
subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
|
|
|
|
/*
|
|
* See IEEE Std 802.11-2012,
|
|
* 8.2.4.1.9 'Protected Frame field'
|
|
*/
|
|
/* XXX no support for robust management frames yet. */
|
|
if (!(type == IEEE80211_FC0_TYPE_DATA ||
|
|
(type == IEEE80211_FC0_TYPE_MGT &&
|
|
subtype == IEEE80211_FC0_SUBTYPE_AUTH)))
|
|
return (EINVAL);
|
|
|
|
wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
|
|
}
|
|
|
|
if (m->m_pkthdr.len < ieee80211_anyhdrsize(wh))
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ieee80211_validate_rate(struct ieee80211_node *ni, uint8_t rate)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
if (IEEE80211_IS_HT_RATE(rate)) {
|
|
if ((ic->ic_htcaps & IEEE80211_HTC_HT) == 0)
|
|
return (EINVAL);
|
|
|
|
rate = IEEE80211_RV(rate);
|
|
if (rate <= 31) {
|
|
if (rate > ic->ic_txstream * 8 - 1)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
if (rate == 32) {
|
|
if ((ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
if ((ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) == 0)
|
|
return (EINVAL);
|
|
|
|
switch (ic->ic_txstream) {
|
|
case 0:
|
|
case 1:
|
|
return (EINVAL);
|
|
case 2:
|
|
if (rate > 38)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
case 3:
|
|
if (rate > 52)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
case 4:
|
|
default:
|
|
if (rate > 76)
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
if (!ieee80211_isratevalid(ic->ic_rt, rate))
|
|
return (EINVAL);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ieee80211_sanitize_rates(struct ieee80211_node *ni, struct mbuf *m,
|
|
const struct ieee80211_bpf_params *params)
|
|
{
|
|
int error;
|
|
|
|
if (!params)
|
|
return (0); /* nothing to do */
|
|
|
|
/* NB: most drivers assume that ibp_rate0 is set (!= 0). */
|
|
if (params->ibp_rate0 != 0) {
|
|
error = ieee80211_validate_rate(ni, params->ibp_rate0);
|
|
if (error != 0)
|
|
return (error);
|
|
} else {
|
|
/* XXX pre-setup some default (e.g., mgmt / mcast) rate */
|
|
/* XXX __DECONST? */
|
|
(void) m;
|
|
}
|
|
|
|
if (params->ibp_rate1 != 0 &&
|
|
(error = ieee80211_validate_rate(ni, params->ibp_rate1)) != 0)
|
|
return (error);
|
|
|
|
if (params->ibp_rate2 != 0 &&
|
|
(error = ieee80211_validate_rate(ni, params->ibp_rate2)) != 0)
|
|
return (error);
|
|
|
|
if (params->ibp_rate3 != 0 &&
|
|
(error = ieee80211_validate_rate(ni, params->ibp_rate3)) != 0)
|
|
return (error);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 802.11 output routine. This is (currently) used only to
|
|
* connect bpf write calls to the 802.11 layer for injecting
|
|
* raw 802.11 frames.
|
|
*/
|
|
int
|
|
ieee80211_output(struct ifnet *ifp, struct mbuf *m,
|
|
const struct sockaddr *dst, struct route *ro)
|
|
{
|
|
#define senderr(e) do { error = (e); goto bad;} while (0)
|
|
const struct ieee80211_bpf_params *params = NULL;
|
|
struct ieee80211_node *ni = NULL;
|
|
struct ieee80211vap *vap;
|
|
struct ieee80211_frame *wh;
|
|
struct ieee80211com *ic = NULL;
|
|
int error;
|
|
int ret;
|
|
|
|
if (ifp->if_drv_flags & IFF_DRV_OACTIVE) {
|
|
/*
|
|
* Short-circuit requests if the vap is marked OACTIVE
|
|
* as this can happen because a packet came down through
|
|
* ieee80211_start before the vap entered RUN state in
|
|
* which case it's ok to just drop the frame. This
|
|
* should not be necessary but callers of if_output don't
|
|
* check OACTIVE.
|
|
*/
|
|
senderr(ENETDOWN);
|
|
}
|
|
vap = ifp->if_softc;
|
|
ic = vap->iv_ic;
|
|
/*
|
|
* Hand to the 802.3 code if not tagged as
|
|
* a raw 802.11 frame.
|
|
*/
|
|
if (dst->sa_family != AF_IEEE80211)
|
|
return vap->iv_output(ifp, m, dst, ro);
|
|
#ifdef MAC
|
|
error = mac_ifnet_check_transmit(ifp, m);
|
|
if (error)
|
|
senderr(error);
|
|
#endif
|
|
if (ifp->if_flags & IFF_MONITOR)
|
|
senderr(ENETDOWN);
|
|
if (!IFNET_IS_UP_RUNNING(ifp))
|
|
senderr(ENETDOWN);
|
|
if (vap->iv_state == IEEE80211_S_CAC) {
|
|
IEEE80211_DPRINTF(vap,
|
|
IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
|
|
"block %s frame in CAC state\n", "raw data");
|
|
vap->iv_stats.is_tx_badstate++;
|
|
senderr(EIO); /* XXX */
|
|
} else if (vap->iv_state == IEEE80211_S_SCAN)
|
|
senderr(EIO);
|
|
/* XXX bypass bridge, pfil, carp, etc. */
|
|
|
|
/*
|
|
* NB: DLT_IEEE802_11_RADIO identifies the parameters are
|
|
* present by setting the sa_len field of the sockaddr (yes,
|
|
* this is a hack).
|
|
* NB: we assume sa_data is suitably aligned to cast.
|
|
*/
|
|
if (dst->sa_len != 0)
|
|
params = (const struct ieee80211_bpf_params *)dst->sa_data;
|
|
|
|
error = ieee80211_validate_frame(m, params);
|
|
if (error != 0)
|
|
senderr(error);
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
/* locate destination node */
|
|
switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
|
|
case IEEE80211_FC1_DIR_NODS:
|
|
case IEEE80211_FC1_DIR_FROMDS:
|
|
ni = ieee80211_find_txnode(vap, wh->i_addr1);
|
|
break;
|
|
case IEEE80211_FC1_DIR_TODS:
|
|
case IEEE80211_FC1_DIR_DSTODS:
|
|
ni = ieee80211_find_txnode(vap, wh->i_addr3);
|
|
break;
|
|
default:
|
|
senderr(EDOOFUS);
|
|
}
|
|
if (ni == NULL) {
|
|
/*
|
|
* Permit packets w/ bpf params through regardless
|
|
* (see below about sa_len).
|
|
*/
|
|
if (dst->sa_len == 0)
|
|
senderr(EHOSTUNREACH);
|
|
ni = ieee80211_ref_node(vap->iv_bss);
|
|
}
|
|
|
|
/*
|
|
* Sanitize mbuf for net80211 flags leaked from above.
|
|
*
|
|
* NB: This must be done before ieee80211_classify as
|
|
* it marks EAPOL in frames with M_EAPOL.
|
|
*/
|
|
m->m_flags &= ~M_80211_TX;
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
|
|
if (IEEE80211_IS_DATA(wh)) {
|
|
/* calculate priority so drivers can find the tx queue */
|
|
if (ieee80211_classify(ni, m))
|
|
senderr(EIO); /* XXX */
|
|
|
|
/* NB: ieee80211_encap does not include 802.11 header */
|
|
IEEE80211_NODE_STAT_ADD(ni, tx_bytes,
|
|
m->m_pkthdr.len - ieee80211_hdrsize(wh));
|
|
} else
|
|
M_WME_SETAC(m, WME_AC_BE);
|
|
|
|
error = ieee80211_sanitize_rates(ni, m, params);
|
|
if (error != 0)
|
|
senderr(error);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_data);
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
IEEE80211_NODE_STAT(ni, tx_mcast);
|
|
m->m_flags |= M_MCAST;
|
|
} else
|
|
IEEE80211_NODE_STAT(ni, tx_ucast);
|
|
|
|
IEEE80211_TX_LOCK(ic);
|
|
ret = ieee80211_raw_output(vap, ni, m, params);
|
|
IEEE80211_TX_UNLOCK(ic);
|
|
return (ret);
|
|
bad:
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
if (ni != NULL)
|
|
ieee80211_free_node(ni);
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
return error;
|
|
#undef senderr
|
|
}
|
|
|
|
/*
|
|
* Set the direction field and address fields of an outgoing
|
|
* frame. Note this should be called early on in constructing
|
|
* a frame as it sets i_fc[1]; other bits can then be or'd in.
|
|
*/
|
|
void
|
|
ieee80211_send_setup(
|
|
struct ieee80211_node *ni,
|
|
struct mbuf *m,
|
|
int type, int tid,
|
|
const uint8_t sa[IEEE80211_ADDR_LEN],
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
const uint8_t bssid[IEEE80211_ADDR_LEN])
|
|
{
|
|
#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211_tx_ampdu *tap;
|
|
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
|
|
ieee80211_seq seqno;
|
|
|
|
IEEE80211_TX_LOCK_ASSERT(ni->ni_ic);
|
|
|
|
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
|
|
if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
|
|
switch (vap->iv_opmode) {
|
|
case IEEE80211_M_STA:
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, sa);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, da);
|
|
break;
|
|
case IEEE80211_M_IBSS:
|
|
case IEEE80211_M_AHDEMO:
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, da);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, sa);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
|
|
break;
|
|
case IEEE80211_M_HOSTAP:
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, da);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, sa);
|
|
break;
|
|
case IEEE80211_M_WDS:
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, da);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, da);
|
|
IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
|
|
break;
|
|
case IEEE80211_M_MBSS:
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (IEEE80211_IS_MULTICAST(da)) {
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
|
|
/* XXX next hop */
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, da);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2,
|
|
vap->iv_myaddr);
|
|
} else {
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, da);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2,
|
|
vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, da);
|
|
IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
|
|
}
|
|
#endif
|
|
break;
|
|
case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
|
|
break;
|
|
}
|
|
} else {
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, da);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, sa);
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS)
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, sa);
|
|
else
|
|
#endif
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
|
|
}
|
|
*(uint16_t *)&wh->i_dur[0] = 0;
|
|
|
|
/*
|
|
* XXX TODO: this is what the TX lock is for.
|
|
* Here we're incrementing sequence numbers, and they
|
|
* need to be in lock-step with what the driver is doing
|
|
* both in TX ordering and crypto encap (IV increment.)
|
|
*
|
|
* If the driver does seqno itself, then we can skip
|
|
* assigning sequence numbers here, and we can avoid
|
|
* requiring the TX lock.
|
|
*/
|
|
tap = &ni->ni_tx_ampdu[tid];
|
|
if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) {
|
|
m->m_flags |= M_AMPDU_MPDU;
|
|
|
|
/* NB: zero out i_seq field (for s/w encryption etc) */
|
|
*(uint16_t *)&wh->i_seq[0] = 0;
|
|
} else {
|
|
if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK,
|
|
type & IEEE80211_FC0_SUBTYPE_MASK))
|
|
/*
|
|
* 802.11-2012 9.3.2.10 - QoS multicast frames
|
|
* come out of a different seqno space.
|
|
*/
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
|
|
} else {
|
|
seqno = ni->ni_txseqs[tid]++;
|
|
}
|
|
else
|
|
seqno = 0;
|
|
|
|
*(uint16_t *)&wh->i_seq[0] =
|
|
htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
|
|
M_SEQNO_SET(m, seqno);
|
|
}
|
|
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1))
|
|
m->m_flags |= M_MCAST;
|
|
#undef WH4
|
|
}
|
|
|
|
/*
|
|
* Send a management frame to the specified node. The node pointer
|
|
* must have a reference as the pointer will be passed to the driver
|
|
* and potentially held for a long time. If the frame is successfully
|
|
* dispatched to the driver, then it is responsible for freeing the
|
|
* reference (and potentially free'ing up any associated storage);
|
|
* otherwise deal with reclaiming any reference (on error).
|
|
*/
|
|
int
|
|
ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type,
|
|
struct ieee80211_bpf_params *params)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_frame *wh;
|
|
int ret;
|
|
|
|
KASSERT(ni != NULL, ("null node"));
|
|
|
|
if (vap->iv_state == IEEE80211_S_CAC) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
|
|
ni, "block %s frame in CAC state",
|
|
ieee80211_mgt_subtype_name(type));
|
|
vap->iv_stats.is_tx_badstate++;
|
|
ieee80211_free_node(ni);
|
|
m_freem(m);
|
|
return EIO; /* XXX */
|
|
}
|
|
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
|
|
if (m == NULL) {
|
|
ieee80211_free_node(ni);
|
|
return ENOMEM;
|
|
}
|
|
|
|
IEEE80211_TX_LOCK(ic);
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
ieee80211_send_setup(ni, m,
|
|
IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID,
|
|
vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
|
|
if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1,
|
|
"encrypting frame (%s)", __func__);
|
|
wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
|
|
}
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
|
|
KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?"));
|
|
M_WME_SETAC(m, params->ibp_pri);
|
|
|
|
#ifdef IEEE80211_DEBUG
|
|
/* avoid printing too many frames */
|
|
if ((ieee80211_msg_debug(vap) && doprint(vap, type)) ||
|
|
ieee80211_msg_dumppkts(vap)) {
|
|
printf("[%s] send %s on channel %u\n",
|
|
ether_sprintf(wh->i_addr1),
|
|
ieee80211_mgt_subtype_name(type),
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan));
|
|
}
|
|
#endif
|
|
IEEE80211_NODE_STAT(ni, tx_mgmt);
|
|
|
|
ret = ieee80211_raw_output(vap, ni, m, params);
|
|
IEEE80211_TX_UNLOCK(ic);
|
|
return (ret);
|
|
}
|
|
|
|
static void
|
|
ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg,
|
|
int status)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
|
|
wakeup(vap);
|
|
}
|
|
|
|
/*
|
|
* Send a null data frame to the specified node. If the station
|
|
* is setup for QoS then a QoS Null Data frame is constructed.
|
|
* If this is a WDS station then a 4-address frame is constructed.
|
|
*
|
|
* 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. Like ieee80211_mgmt_output
|
|
* we must cleanup any node reference on error; however we
|
|
* can safely just unref it as we know it will never be the
|
|
* last reference to the node.
|
|
*/
|
|
int
|
|
ieee80211_send_nulldata(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct mbuf *m;
|
|
struct ieee80211_frame *wh;
|
|
int hdrlen;
|
|
uint8_t *frm;
|
|
int ret;
|
|
|
|
if (vap->iv_state == IEEE80211_S_CAC) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
|
|
ni, "block %s frame in CAC state", "null data");
|
|
ieee80211_unref_node(&ni);
|
|
vap->iv_stats.is_tx_badstate++;
|
|
return EIO; /* XXX */
|
|
}
|
|
|
|
if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))
|
|
hdrlen = sizeof(struct ieee80211_qosframe);
|
|
else
|
|
hdrlen = sizeof(struct ieee80211_frame);
|
|
/* NB: only WDS vap's get 4-address frames */
|
|
if (vap->iv_opmode == IEEE80211_M_WDS)
|
|
hdrlen += IEEE80211_ADDR_LEN;
|
|
if (ic->ic_flags & IEEE80211_F_DATAPAD)
|
|
hdrlen = roundup(hdrlen, sizeof(uint32_t));
|
|
|
|
m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0);
|
|
if (m == NULL) {
|
|
/* XXX debug msg */
|
|
ieee80211_unref_node(&ni);
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
return ENOMEM;
|
|
}
|
|
KASSERT(M_LEADINGSPACE(m) >= hdrlen,
|
|
("leading space %zd", M_LEADINGSPACE(m)));
|
|
M_PREPEND(m, hdrlen, M_NOWAIT);
|
|
if (m == NULL) {
|
|
/* NB: cannot happen */
|
|
ieee80211_free_node(ni);
|
|
return ENOMEM;
|
|
}
|
|
|
|
IEEE80211_TX_LOCK(ic);
|
|
|
|
wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */
|
|
if (ni->ni_flags & IEEE80211_NODE_QOS) {
|
|
const int tid = WME_AC_TO_TID(WME_AC_BE);
|
|
uint8_t *qos;
|
|
|
|
ieee80211_send_setup(ni, m,
|
|
IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL,
|
|
tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
|
|
|
|
if (vap->iv_opmode == IEEE80211_M_WDS)
|
|
qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
|
|
else
|
|
qos = ((struct ieee80211_qosframe *) wh)->i_qos;
|
|
qos[0] = tid & IEEE80211_QOS_TID;
|
|
if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy)
|
|
qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
|
|
qos[1] = 0;
|
|
} else {
|
|
ieee80211_send_setup(ni, m,
|
|
IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
|
|
IEEE80211_NONQOS_TID,
|
|
vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
|
|
}
|
|
if (vap->iv_opmode != IEEE80211_M_WDS) {
|
|
/* NB: power management bit is never sent by an AP */
|
|
if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
|
|
vap->iv_opmode != IEEE80211_M_HOSTAP)
|
|
wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
|
|
}
|
|
if ((ic->ic_flags & IEEE80211_F_SCAN) &&
|
|
(ni->ni_flags & IEEE80211_NODE_PWR_MGT)) {
|
|
ieee80211_add_callback(m, ieee80211_nulldata_transmitted,
|
|
NULL);
|
|
}
|
|
m->m_len = m->m_pkthdr.len = hdrlen;
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
|
|
M_WME_SETAC(m, WME_AC_BE);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_data);
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni,
|
|
"send %snull data frame on channel %u, pwr mgt %s",
|
|
ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "",
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan),
|
|
wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
|
|
|
|
ret = ieee80211_raw_output(vap, ni, m, NULL);
|
|
IEEE80211_TX_UNLOCK(ic);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* 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 ieee80211_node *ni, struct mbuf *m)
|
|
{
|
|
const struct ether_header *eh = NULL;
|
|
uint16_t ether_type;
|
|
int v_wme_ac, d_wme_ac, ac;
|
|
|
|
if (__predict_false(m->m_flags & M_ENCAP)) {
|
|
struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
|
|
struct llc *llc;
|
|
int hdrlen, subtype;
|
|
|
|
subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
|
|
if (subtype & IEEE80211_FC0_SUBTYPE_NODATA) {
|
|
ac = WME_AC_BE;
|
|
goto done;
|
|
}
|
|
|
|
hdrlen = ieee80211_hdrsize(wh);
|
|
if (m->m_pkthdr.len < hdrlen + sizeof(*llc))
|
|
return 1;
|
|
|
|
llc = (struct llc *)mtodo(m, hdrlen);
|
|
if (llc->llc_dsap != LLC_SNAP_LSAP ||
|
|
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)
|
|
return 1;
|
|
|
|
ether_type = llc->llc_snap.ether_type;
|
|
} else {
|
|
eh = mtod(m, struct ether_header *);
|
|
ether_type = eh->ether_type;
|
|
}
|
|
|
|
/*
|
|
* Always promote PAE/EAPOL frames to high priority.
|
|
*/
|
|
if (ether_type == htons(ETHERTYPE_PAE)) {
|
|
/* NB: mark so others don't need to check header */
|
|
m->m_flags |= M_EAPOL;
|
|
ac = WME_AC_VO;
|
|
goto done;
|
|
}
|
|
/*
|
|
* Non-qos traffic goes to BE.
|
|
*/
|
|
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) {
|
|
if ((m->m_flags & M_VLANTAG) == 0) {
|
|
IEEE80211_NODE_STAT(ni, tx_novlantag);
|
|
return 1;
|
|
}
|
|
if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) !=
|
|
EVL_VLANOFTAG(ni->ni_vlan)) {
|
|
IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
|
|
return 1;
|
|
}
|
|
/* map vlan priority to AC */
|
|
v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan));
|
|
}
|
|
|
|
/* XXX m_copydata may be too slow for fast path */
|
|
#ifdef INET
|
|
if (eh && eh->ether_type == htons(ETHERTYPE_IP)) {
|
|
uint8_t tos;
|
|
/*
|
|
* IP frame, map the DSCP bits from the TOS field.
|
|
*/
|
|
/* NB: ip header may not be in first mbuf */
|
|
m_copydata(m, sizeof(struct ether_header) +
|
|
offsetof(struct ip, ip_tos), sizeof(tos), &tos);
|
|
tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
|
|
d_wme_ac = TID_TO_WME_AC(tos);
|
|
} else {
|
|
#endif /* INET */
|
|
#ifdef INET6
|
|
if (eh && eh->ether_type == htons(ETHERTYPE_IPV6)) {
|
|
uint32_t flow;
|
|
uint8_t tos;
|
|
/*
|
|
* IPv6 frame, map the DSCP bits from the traffic class field.
|
|
*/
|
|
m_copydata(m, sizeof(struct ether_header) +
|
|
offsetof(struct ip6_hdr, ip6_flow), sizeof(flow),
|
|
(caddr_t) &flow);
|
|
tos = (uint8_t)(ntohl(flow) >> 20);
|
|
tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
|
|
d_wme_ac = TID_TO_WME_AC(tos);
|
|
} else {
|
|
#endif /* INET6 */
|
|
d_wme_ac = WME_AC_BE;
|
|
#ifdef INET6
|
|
}
|
|
#endif
|
|
#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 (ni->ni_vap->iv_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 */
|
|
};
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
|
|
struct ieee80211_key *key, struct mbuf *m)
|
|
{
|
|
#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
|
|
int needed_space = vap->iv_ic->ic_headroom + hdrsize;
|
|
|
|
if (key != NULL) {
|
|
/* XXX belongs in crypto code? */
|
|
needed_space += key->wk_cipher->ic_header;
|
|
/* XXX frags */
|
|
/*
|
|
* 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_SWENCRYPT|IEEE80211_KEY_SWENMIC)) {
|
|
m = m_unshare(m, M_NOWAIT);
|
|
if (m == NULL) {
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
|
|
"%s: cannot get writable mbuf\n", __func__);
|
|
vap->iv_stats.is_tx_nobuf++; /* XXX new stat */
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* We know we are called just before stripping an Ethernet
|
|
* header and prepending an LLC header. This means we know
|
|
* there will be
|
|
* sizeof(struct ether_header) - sizeof(struct llc)
|
|
* 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(vap, IEEE80211_MSG_OUTPUT,
|
|
"%s: cannot expand storage\n", __func__);
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
m_freem(m);
|
|
return NULL;
|
|
}
|
|
KASSERT(needed_space <= MHLEN,
|
|
("not enough room, need %u got %d\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.
|
|
*/
|
|
static __inline struct ieee80211_key *
|
|
ieee80211_crypto_getucastkey(struct ieee80211vap *vap,
|
|
struct ieee80211_node *ni)
|
|
{
|
|
if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
|
|
if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
|
|
IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
|
|
return NULL;
|
|
return &vap->iv_nw_keys[vap->iv_def_txkey];
|
|
} else {
|
|
return &ni->ni_ucastkey;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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 ieee80211vap *vap,
|
|
struct ieee80211_node *ni)
|
|
{
|
|
if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
|
|
IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
|
|
return NULL;
|
|
return &vap->iv_nw_keys[vap->iv_def_txkey];
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* NB: Packet is assumed to be processed by ieee80211_classify which
|
|
* marked EAPOL frames w/ M_EAPOL.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
|
|
struct mbuf *m)
|
|
{
|
|
#define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh))
|
|
#define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc)
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
struct ieee80211_mesh_state *ms = vap->iv_mesh;
|
|
struct ieee80211_meshcntl_ae10 *mc;
|
|
struct ieee80211_mesh_route *rt = NULL;
|
|
int dir = -1;
|
|
#endif
|
|
struct ether_header eh;
|
|
struct ieee80211_frame *wh;
|
|
struct ieee80211_key *key;
|
|
struct llc *llc;
|
|
int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast;
|
|
ieee80211_seq seqno;
|
|
int meshhdrsize, meshae;
|
|
uint8_t *qos;
|
|
int is_amsdu = 0;
|
|
|
|
IEEE80211_TX_LOCK_ASSERT(ic);
|
|
|
|
is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST));
|
|
|
|
/*
|
|
* Copy existing Ethernet header to a safe place. The
|
|
* rest of the code assumes it's ok to strip it when
|
|
* reorganizing state for the final encapsulation.
|
|
*/
|
|
KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
|
|
ETHER_HEADER_COPY(&eh, mtod(m, caddr_t));
|
|
|
|
/*
|
|
* 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 (vap->iv_flags & IEEE80211_F_PRIVACY) {
|
|
if (vap->iv_opmode == IEEE80211_M_STA ||
|
|
!IEEE80211_IS_MULTICAST(eh.ether_dhost) ||
|
|
(vap->iv_opmode == IEEE80211_M_WDS &&
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)))
|
|
key = ieee80211_crypto_getucastkey(vap, ni);
|
|
else
|
|
key = ieee80211_crypto_getmcastkey(vap, ni);
|
|
if (key == NULL && (m->m_flags & M_EAPOL) == 0) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO,
|
|
eh.ether_dhost,
|
|
"no default transmit key (%s) deftxkey %u",
|
|
__func__, vap->iv_def_txkey);
|
|
vap->iv_stats.is_tx_nodefkey++;
|
|
goto bad;
|
|
}
|
|
} else
|
|
key = NULL;
|
|
/*
|
|
* 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.
|
|
*
|
|
* Don't send multicast QoS frames.
|
|
* Technically multicast frames can be QoS if all stations in the
|
|
* BSS are also QoS.
|
|
*
|
|
* NB: mesh data frames are QoS, including multicast frames.
|
|
*/
|
|
addqos =
|
|
(((is_mcast == 0) && (ni->ni_flags &
|
|
(IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) ||
|
|
(vap->iv_opmode == IEEE80211_M_MBSS)) &&
|
|
(m->m_flags & M_EAPOL) == 0;
|
|
|
|
if (addqos)
|
|
hdrsize = sizeof(struct ieee80211_qosframe);
|
|
else
|
|
hdrsize = sizeof(struct ieee80211_frame);
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS) {
|
|
/*
|
|
* Mesh data frames are encapsulated according to the
|
|
* rules of Section 11B.8.5 (p.139 of D3.0 spec).
|
|
* o Group Addressed data (aka multicast) originating
|
|
* at the local sta are sent w/ 3-address format and
|
|
* address extension mode 00
|
|
* o Individually Addressed data (aka unicast) originating
|
|
* at the local sta are sent w/ 4-address format and
|
|
* address extension mode 00
|
|
* o Group Addressed data forwarded from a non-mesh sta are
|
|
* sent w/ 3-address format and address extension mode 01
|
|
* o Individually Address data from another sta are sent
|
|
* w/ 4-address format and address extension mode 10
|
|
*/
|
|
is4addr = 0; /* NB: don't use, disable */
|
|
if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
|
|
rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost);
|
|
KASSERT(rt != NULL, ("route is NULL"));
|
|
dir = IEEE80211_FC1_DIR_DSTODS;
|
|
hdrsize += IEEE80211_ADDR_LEN;
|
|
if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
|
|
if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate,
|
|
vap->iv_myaddr)) {
|
|
IEEE80211_NOTE_MAC(vap,
|
|
IEEE80211_MSG_MESH,
|
|
eh.ether_dhost,
|
|
"%s", "trying to send to ourself");
|
|
goto bad;
|
|
}
|
|
meshae = IEEE80211_MESH_AE_10;
|
|
meshhdrsize =
|
|
sizeof(struct ieee80211_meshcntl_ae10);
|
|
} else {
|
|
meshae = IEEE80211_MESH_AE_00;
|
|
meshhdrsize =
|
|
sizeof(struct ieee80211_meshcntl);
|
|
}
|
|
} else {
|
|
dir = IEEE80211_FC1_DIR_FROMDS;
|
|
if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) {
|
|
/* proxy group */
|
|
meshae = IEEE80211_MESH_AE_01;
|
|
meshhdrsize =
|
|
sizeof(struct ieee80211_meshcntl_ae01);
|
|
} else {
|
|
/* group */
|
|
meshae = IEEE80211_MESH_AE_00;
|
|
meshhdrsize = sizeof(struct ieee80211_meshcntl);
|
|
}
|
|
}
|
|
} else {
|
|
#endif
|
|
/*
|
|
* 4-address frames need to be generated for:
|
|
* o packets sent through a WDS vap (IEEE80211_M_WDS)
|
|
* o packets sent through a vap marked for relaying
|
|
* (e.g. a station operating with dynamic WDS)
|
|
*/
|
|
is4addr = vap->iv_opmode == IEEE80211_M_WDS ||
|
|
((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) &&
|
|
!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr));
|
|
if (is4addr)
|
|
hdrsize += IEEE80211_ADDR_LEN;
|
|
meshhdrsize = meshae = 0;
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
}
|
|
#endif
|
|
/*
|
|
* Honor driver DATAPAD requirement.
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_DATAPAD)
|
|
hdrspace = roundup(hdrsize, sizeof(uint32_t));
|
|
else
|
|
hdrspace = hdrsize;
|
|
|
|
if (__predict_true((m->m_flags & M_FF) == 0)) {
|
|
/*
|
|
* Normal frame.
|
|
*/
|
|
m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m);
|
|
if (m == NULL) {
|
|
/* NB: ieee80211_mbuf_adjust handles msgs+statistics */
|
|
goto bad;
|
|
}
|
|
/* NB: this could be optimized 'cuz 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;
|
|
} else {
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
/*
|
|
* Aggregated frame. Check if it's for AMSDU or FF.
|
|
*
|
|
* XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented
|
|
* anywhere for some reason. But, since 11n requires
|
|
* AMSDU RX, we can just assume "11n" == "AMSDU".
|
|
*/
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__);
|
|
if (ieee80211_amsdu_tx_ok(ni)) {
|
|
m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key);
|
|
is_amsdu = 1;
|
|
} else {
|
|
m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key);
|
|
}
|
|
if (m == NULL)
|
|
#endif
|
|
goto bad;
|
|
}
|
|
datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
|
|
|
|
M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT);
|
|
if (m == NULL) {
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
goto bad;
|
|
}
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
|
|
*(uint16_t *)wh->i_dur = 0;
|
|
qos = NULL; /* NB: quiet compiler */
|
|
if (is4addr) {
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
|
|
IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
|
|
} else switch (vap->iv_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 iv_bss as the
|
|
* neighbor's may be stale after an ibss merge
|
|
*/
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_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;
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
case IEEE80211_M_MBSS:
|
|
/* NB: offset by hdrspace to deal with DATAPAD */
|
|
mc = (struct ieee80211_meshcntl_ae10 *)
|
|
(mtod(m, uint8_t *) + hdrspace);
|
|
wh->i_fc[1] = dir;
|
|
switch (meshae) {
|
|
case IEEE80211_MESH_AE_00: /* no proxy */
|
|
mc->mc_flags = 0;
|
|
if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */
|
|
IEEE80211_ADDR_COPY(wh->i_addr1,
|
|
ni->ni_macaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2,
|
|
vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3,
|
|
eh.ether_dhost);
|
|
IEEE80211_ADDR_COPY(WH4(wh)->i_addr4,
|
|
eh.ether_shost);
|
|
qos =((struct ieee80211_qosframe_addr4 *)
|
|
wh)->i_qos;
|
|
} else if (dir == IEEE80211_FC1_DIR_FROMDS) {
|
|
/* mcast */
|
|
IEEE80211_ADDR_COPY(wh->i_addr1,
|
|
eh.ether_dhost);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2,
|
|
vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3,
|
|
eh.ether_shost);
|
|
qos = ((struct ieee80211_qosframe *)
|
|
wh)->i_qos;
|
|
}
|
|
break;
|
|
case IEEE80211_MESH_AE_01: /* mcast, proxy */
|
|
wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr);
|
|
mc->mc_flags = 1;
|
|
IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4,
|
|
eh.ether_shost);
|
|
qos = ((struct ieee80211_qosframe *) wh)->i_qos;
|
|
break;
|
|
case IEEE80211_MESH_AE_10: /* ucast, proxy */
|
|
KASSERT(rt != NULL, ("route is NULL"));
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate);
|
|
IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr);
|
|
mc->mc_flags = IEEE80211_MESH_AE_10;
|
|
IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost);
|
|
IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost);
|
|
qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
|
|
break;
|
|
default:
|
|
KASSERT(0, ("meshae %d", meshae));
|
|
break;
|
|
}
|
|
mc->mc_ttl = ms->ms_ttl;
|
|
ms->ms_seq++;
|
|
le32enc(mc->mc_seq, ms->ms_seq);
|
|
break;
|
|
#endif
|
|
case IEEE80211_M_WDS: /* NB: is4addr should always be true */
|
|
default:
|
|
goto bad;
|
|
}
|
|
if (m->m_flags & M_MORE_DATA)
|
|
wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
|
|
if (addqos) {
|
|
int ac, tid;
|
|
|
|
if (is4addr) {
|
|
qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
|
|
/* NB: mesh case handled earlier */
|
|
} else if (vap->iv_opmode != IEEE80211_M_MBSS)
|
|
qos = ((struct ieee80211_qosframe *) wh)->i_qos;
|
|
ac = M_WME_GETAC(m);
|
|
/* map from access class/queue to 11e header priorty value */
|
|
tid = WME_AC_TO_TID(ac);
|
|
qos[0] = tid & IEEE80211_QOS_TID;
|
|
if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
|
|
qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS)
|
|
qos[1] = IEEE80211_QOS_MC;
|
|
else
|
|
#endif
|
|
qos[1] = 0;
|
|
wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
|
|
|
|
/*
|
|
* If this is an A-MSDU then ensure we set the
|
|
* relevant field.
|
|
*/
|
|
if (is_amsdu)
|
|
qos[0] |= IEEE80211_QOS_AMSDU;
|
|
|
|
/*
|
|
* XXX TODO TX lock is needed for atomic updates of sequence
|
|
* numbers. If the driver does it, then don't do it here;
|
|
* and we don't need the TX lock held.
|
|
*/
|
|
if ((m->m_flags & M_AMPDU_MPDU) == 0) {
|
|
/*
|
|
* 802.11-2012 9.3.2.10 -
|
|
*
|
|
* If this is a multicast frame then we need
|
|
* to ensure that the sequence number comes from
|
|
* a separate seqno space and not the TID space.
|
|
*
|
|
* Otherwise multicast frames may actually cause
|
|
* holes in the TX blockack window space and
|
|
* upset various things.
|
|
*/
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1))
|
|
seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
|
|
else
|
|
seqno = ni->ni_txseqs[tid]++;
|
|
|
|
/*
|
|
* NB: don't assign a sequence # to potential
|
|
* aggregates; we expect this happens at the
|
|
* point the frame comes off any aggregation q
|
|
* as otherwise we may introduce holes in the
|
|
* BA sequence space and/or make window accouting
|
|
* more difficult.
|
|
*
|
|
* XXX may want to control this with a driver
|
|
* capability; this may also change when we pull
|
|
* aggregation up into net80211
|
|
*/
|
|
*(uint16_t *)wh->i_seq =
|
|
htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
|
|
M_SEQNO_SET(m, seqno);
|
|
} else {
|
|
/* NB: zero out i_seq field (for s/w encryption etc) */
|
|
*(uint16_t *)wh->i_seq = 0;
|
|
}
|
|
} else {
|
|
/*
|
|
* XXX TODO TX lock is needed for atomic updates of sequence
|
|
* numbers. If the driver does it, then don't do it here;
|
|
* and we don't need the TX lock held.
|
|
*/
|
|
seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
|
|
*(uint16_t *)wh->i_seq =
|
|
htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
|
|
M_SEQNO_SET(m, seqno);
|
|
|
|
/*
|
|
* XXX TODO: we shouldn't allow EAPOL, etc that would
|
|
* be forced to be non-QoS traffic to be A-MSDU encapsulated.
|
|
*/
|
|
if (is_amsdu)
|
|
printf("%s: XXX ERROR: is_amsdu set; not QoS!\n",
|
|
__func__);
|
|
}
|
|
|
|
/*
|
|
* Check if xmit fragmentation is required.
|
|
*
|
|
* If the hardware does fragmentation offload, then don't bother
|
|
* doing it here.
|
|
*/
|
|
if (IEEE80211_CONF_FRAG_OFFLOAD(ic))
|
|
txfrag = 0;
|
|
else
|
|
txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
|
|
!IEEE80211_IS_MULTICAST(wh->i_addr1) &&
|
|
(vap->iv_caps & IEEE80211_C_TXFRAG) &&
|
|
(m->m_flags & (M_FF | M_AMPDU_MPDU)) == 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 ((m->m_flags & M_EAPOL) == 0 ||
|
|
((vap->iv_flags & IEEE80211_F_WPA) &&
|
|
(vap->iv_opmode == IEEE80211_M_STA ?
|
|
!IEEE80211_KEY_UNDEFINED(key) :
|
|
!IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
|
|
wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
|
|
if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT,
|
|
eh.ether_dhost,
|
|
"%s", "enmic failed, discard frame");
|
|
vap->iv_stats.is_crypto_enmicfail++;
|
|
goto bad;
|
|
}
|
|
}
|
|
}
|
|
if (txfrag && !ieee80211_fragment(vap, m, hdrsize,
|
|
key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold))
|
|
goto bad;
|
|
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_data);
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
IEEE80211_NODE_STAT(ni, tx_mcast);
|
|
m->m_flags |= M_MCAST;
|
|
} else
|
|
IEEE80211_NODE_STAT(ni, tx_ucast);
|
|
IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
|
|
|
|
return m;
|
|
bad:
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return NULL;
|
|
#undef WH4
|
|
#undef MC01
|
|
}
|
|
|
|
void
|
|
ieee80211_free_mbuf(struct mbuf *m)
|
|
{
|
|
struct mbuf *next;
|
|
|
|
if (m == NULL)
|
|
return;
|
|
|
|
do {
|
|
next = m->m_nextpkt;
|
|
m->m_nextpkt = NULL;
|
|
m_freem(m);
|
|
} while ((m = next) != NULL);
|
|
}
|
|
|
|
/*
|
|
* Fragment the frame according to the specified mtu.
|
|
* The size of the 802.11 header (w/o padding) is provided
|
|
* so we don't need to recalculate it. We create a new
|
|
* mbuf for each fragment and chain it through m_nextpkt;
|
|
* we might be able to optimize this by reusing the original
|
|
* packet's mbufs but that is significantly more complicated.
|
|
*/
|
|
static int
|
|
ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0,
|
|
u_int hdrsize, u_int ciphdrsize, u_int mtu)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct ieee80211_frame *wh, *whf;
|
|
struct mbuf *m, *prev;
|
|
u_int totalhdrsize, fragno, fragsize, off, remainder, payload;
|
|
u_int hdrspace;
|
|
|
|
KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?"));
|
|
KASSERT(m0->m_pkthdr.len > mtu,
|
|
("pktlen %u mtu %u", m0->m_pkthdr.len, mtu));
|
|
|
|
/*
|
|
* Honor driver DATAPAD requirement.
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_DATAPAD)
|
|
hdrspace = roundup(hdrsize, sizeof(uint32_t));
|
|
else
|
|
hdrspace = hdrsize;
|
|
|
|
wh = mtod(m0, struct ieee80211_frame *);
|
|
/* NB: mark the first frag; it will be propagated below */
|
|
wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG;
|
|
totalhdrsize = hdrspace + ciphdrsize;
|
|
fragno = 1;
|
|
off = mtu - ciphdrsize;
|
|
remainder = m0->m_pkthdr.len - off;
|
|
prev = m0;
|
|
do {
|
|
fragsize = MIN(totalhdrsize + remainder, mtu);
|
|
m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR);
|
|
if (m == NULL)
|
|
goto bad;
|
|
/* leave room to prepend any cipher header */
|
|
m_align(m, fragsize - ciphdrsize);
|
|
|
|
/*
|
|
* Form the header in the fragment. Note that since
|
|
* we mark the first fragment with the MORE_FRAG bit
|
|
* it automatically is propagated to each fragment; we
|
|
* need only clear it on the last fragment (done below).
|
|
* NB: frag 1+ dont have Mesh Control field present.
|
|
*/
|
|
whf = mtod(m, struct ieee80211_frame *);
|
|
memcpy(whf, wh, hdrsize);
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS)
|
|
ieee80211_getqos(wh)[1] &= ~IEEE80211_QOS_MC;
|
|
#endif
|
|
*(uint16_t *)&whf->i_seq[0] |= htole16(
|
|
(fragno & IEEE80211_SEQ_FRAG_MASK) <<
|
|
IEEE80211_SEQ_FRAG_SHIFT);
|
|
fragno++;
|
|
|
|
payload = fragsize - totalhdrsize;
|
|
/* NB: destination is known to be contiguous */
|
|
|
|
m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace);
|
|
m->m_len = hdrspace + payload;
|
|
m->m_pkthdr.len = hdrspace + payload;
|
|
m->m_flags |= M_FRAG;
|
|
|
|
/* chain up the fragment */
|
|
prev->m_nextpkt = m;
|
|
prev = m;
|
|
|
|
/* deduct fragment just formed */
|
|
remainder -= payload;
|
|
off += payload;
|
|
} while (remainder != 0);
|
|
|
|
/* set the last fragment */
|
|
m->m_flags |= M_LASTFRAG;
|
|
whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG;
|
|
|
|
/* strip first mbuf now that everything has been copied */
|
|
m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize)));
|
|
m0->m_flags |= M_FIRSTFRAG | M_FRAG;
|
|
|
|
vap->iv_stats.is_tx_fragframes++;
|
|
vap->iv_stats.is_tx_frags += fragno-1;
|
|
|
|
return 1;
|
|
bad:
|
|
/* reclaim fragments but leave original frame for caller to free */
|
|
ieee80211_free_mbuf(m0->m_nextpkt);
|
|
m0->m_nextpkt = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Add a supported rates element id to a frame.
|
|
*/
|
|
uint8_t *
|
|
ieee80211_add_rates(uint8_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.
|
|
*/
|
|
uint8_t *
|
|
ieee80211_add_xrates(uint8_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 element to a frame.
|
|
*/
|
|
uint8_t *
|
|
ieee80211_add_ssid(uint8_t *frm, const uint8_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 uint8_t *
|
|
ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic)
|
|
{
|
|
uint8_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;
|
|
}
|
|
|
|
/*
|
|
* Add a CFParams element to a frame.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic)
|
|
{
|
|
#define ADDSHORT(frm, v) do { \
|
|
le16enc(frm, v); \
|
|
frm += 2; \
|
|
} while (0)
|
|
*frm++ = IEEE80211_ELEMID_CFPARMS;
|
|
*frm++ = 6;
|
|
*frm++ = 0; /* CFP count */
|
|
*frm++ = 2; /* CFP period */
|
|
ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */
|
|
ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */
|
|
return frm;
|
|
#undef ADDSHORT
|
|
}
|
|
|
|
static __inline uint8_t *
|
|
add_appie(uint8_t *frm, const struct ieee80211_appie *ie)
|
|
{
|
|
memcpy(frm, ie->ie_data, ie->ie_len);
|
|
return frm + ie->ie_len;
|
|
}
|
|
|
|
static __inline uint8_t *
|
|
add_ie(uint8_t *frm, const uint8_t *ie)
|
|
{
|
|
memcpy(frm, ie, 2 + ie[1]);
|
|
return frm + 2 + ie[1];
|
|
}
|
|
|
|
#define WME_OUI_BYTES 0x00, 0x50, 0xf2
|
|
/*
|
|
* Add a WME information element to a frame.
|
|
*/
|
|
uint8_t *
|
|
ieee80211_add_wme_info(uint8_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 uint8_t *
|
|
ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
|
|
{
|
|
#define SM(_v, _f) (((_v) << _f##_S) & _f)
|
|
#define ADDSHORT(frm, v) do { \
|
|
le16enc(frm, v); \
|
|
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
|
|
|
|
/*
|
|
* Add an 11h Power Constraint element to a frame.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap)
|
|
{
|
|
const struct ieee80211_channel *c = vap->iv_bss->ni_chan;
|
|
/* XXX per-vap tx power limit? */
|
|
int8_t limit = vap->iv_ic->ic_txpowlimit / 2;
|
|
|
|
frm[0] = IEEE80211_ELEMID_PWRCNSTR;
|
|
frm[1] = 1;
|
|
frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0;
|
|
return frm + 3;
|
|
}
|
|
|
|
/*
|
|
* Add an 11h Power Capability element to a frame.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c)
|
|
{
|
|
frm[0] = IEEE80211_ELEMID_PWRCAP;
|
|
frm[1] = 2;
|
|
frm[2] = c->ic_minpower;
|
|
frm[3] = c->ic_maxpower;
|
|
return frm + 4;
|
|
}
|
|
|
|
/*
|
|
* Add an 11h Supported Channels element to a frame.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic)
|
|
{
|
|
static const int ielen = 26;
|
|
|
|
frm[0] = IEEE80211_ELEMID_SUPPCHAN;
|
|
frm[1] = ielen;
|
|
/* XXX not correct */
|
|
memcpy(frm+2, ic->ic_chan_avail, ielen);
|
|
return frm + 2 + ielen;
|
|
}
|
|
|
|
/*
|
|
* Add an 11h Quiet time element to a frame.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update)
|
|
{
|
|
struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm;
|
|
|
|
quiet->quiet_ie = IEEE80211_ELEMID_QUIET;
|
|
quiet->len = 6;
|
|
|
|
/*
|
|
* Only update every beacon interval - otherwise probe responses
|
|
* would update the quiet count value.
|
|
*/
|
|
if (update) {
|
|
if (vap->iv_quiet_count_value == 1)
|
|
vap->iv_quiet_count_value = vap->iv_quiet_count;
|
|
else if (vap->iv_quiet_count_value > 1)
|
|
vap->iv_quiet_count_value--;
|
|
}
|
|
|
|
if (vap->iv_quiet_count_value == 0) {
|
|
/* value 0 is reserved as per 802.11h standerd */
|
|
vap->iv_quiet_count_value = 1;
|
|
}
|
|
|
|
quiet->tbttcount = vap->iv_quiet_count_value;
|
|
quiet->period = vap->iv_quiet_period;
|
|
quiet->duration = htole16(vap->iv_quiet_duration);
|
|
quiet->offset = htole16(vap->iv_quiet_offset);
|
|
return frm + sizeof(*quiet);
|
|
}
|
|
|
|
/*
|
|
* Add an 11h Channel Switch Announcement element to a frame.
|
|
* Note that we use the per-vap CSA count to adjust the global
|
|
* counter so we can use this routine to form probe response
|
|
* frames and get the current count.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm;
|
|
|
|
csa->csa_ie = IEEE80211_ELEMID_CSA;
|
|
csa->csa_len = 3;
|
|
csa->csa_mode = 1; /* XXX force quiet on channel */
|
|
csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan);
|
|
csa->csa_count = ic->ic_csa_count - vap->iv_csa_count;
|
|
return frm + sizeof(*csa);
|
|
}
|
|
|
|
/*
|
|
* Add an 11h country information element to a frame.
|
|
*/
|
|
static uint8_t *
|
|
ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic)
|
|
{
|
|
|
|
if (ic->ic_countryie == NULL ||
|
|
ic->ic_countryie_chan != ic->ic_bsschan) {
|
|
/*
|
|
* Handle lazy construction of ie. This is done on
|
|
* first use and after a channel change that requires
|
|
* re-calculation.
|
|
*/
|
|
if (ic->ic_countryie != NULL)
|
|
IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE);
|
|
ic->ic_countryie = ieee80211_alloc_countryie(ic);
|
|
if (ic->ic_countryie == NULL)
|
|
return frm;
|
|
ic->ic_countryie_chan = ic->ic_bsschan;
|
|
}
|
|
return add_appie(frm, ic->ic_countryie);
|
|
}
|
|
|
|
uint8_t *
|
|
ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap)
|
|
{
|
|
if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL)
|
|
return (add_ie(frm, vap->iv_wpa_ie));
|
|
else {
|
|
/* XXX else complain? */
|
|
return (frm);
|
|
}
|
|
}
|
|
|
|
uint8_t *
|
|
ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap)
|
|
{
|
|
if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL)
|
|
return (add_ie(frm, vap->iv_rsn_ie));
|
|
else {
|
|
/* XXX else complain? */
|
|
return (frm);
|
|
}
|
|
}
|
|
|
|
uint8_t *
|
|
ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni)
|
|
{
|
|
if (ni->ni_flags & IEEE80211_NODE_QOS) {
|
|
*frm++ = IEEE80211_ELEMID_QOS;
|
|
*frm++ = 1;
|
|
*frm++ = 0;
|
|
}
|
|
|
|
return (frm);
|
|
}
|
|
|
|
/*
|
|
* Send a probe request frame with the specified ssid
|
|
* and any optional information element data.
|
|
*/
|
|
int
|
|
ieee80211_send_probereq(struct ieee80211_node *ni,
|
|
const uint8_t sa[IEEE80211_ADDR_LEN],
|
|
const uint8_t da[IEEE80211_ADDR_LEN],
|
|
const uint8_t bssid[IEEE80211_ADDR_LEN],
|
|
const uint8_t *ssid, size_t ssidlen)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_node *bss;
|
|
const struct ieee80211_txparam *tp;
|
|
struct ieee80211_bpf_params params;
|
|
const struct ieee80211_rateset *rs;
|
|
struct mbuf *m;
|
|
uint8_t *frm;
|
|
int ret;
|
|
|
|
bss = ieee80211_ref_node(vap->iv_bss);
|
|
|
|
if (vap->iv_state == IEEE80211_S_CAC) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
|
|
"block %s frame in CAC state", "probe request");
|
|
vap->iv_stats.is_tx_badstate++;
|
|
ieee80211_free_node(bss);
|
|
return EIO; /* XXX */
|
|
}
|
|
|
|
/*
|
|
* 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(vap, 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] RSN (optional)
|
|
* [tlv] extended supported rates
|
|
* [tlv] HT cap (optional)
|
|
* [tlv] VHT cap (optional)
|
|
* [tlv] WPA (optional)
|
|
* [tlv] user-specified ie's
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
2 + IEEE80211_NWID_LEN
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ sizeof(struct ieee80211_ie_htcap)
|
|
+ sizeof(struct ieee80211_ie_vhtcap)
|
|
+ sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */
|
|
+ sizeof(struct ieee80211_ie_wpa)
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ sizeof(struct ieee80211_ie_wpa)
|
|
+ (vap->iv_appie_probereq != NULL ?
|
|
vap->iv_appie_probereq->ie_len : 0)
|
|
);
|
|
if (m == NULL) {
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
ieee80211_free_node(ni);
|
|
ieee80211_free_node(bss);
|
|
return ENOMEM;
|
|
}
|
|
|
|
frm = ieee80211_add_ssid(frm, ssid, ssidlen);
|
|
rs = ieee80211_get_suprates(ic, ic->ic_curchan);
|
|
frm = ieee80211_add_rates(frm, rs);
|
|
frm = ieee80211_add_rsn(frm, vap);
|
|
frm = ieee80211_add_xrates(frm, rs);
|
|
|
|
/*
|
|
* Note: we can't use bss; we don't have one yet.
|
|
*
|
|
* So, we should announce our capabilities
|
|
* in this channel mode (2g/5g), not the
|
|
* channel details itself.
|
|
*/
|
|
if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
|
|
(vap->iv_flags_ht & IEEE80211_FHT_HT)) {
|
|
struct ieee80211_channel *c;
|
|
|
|
/*
|
|
* Get the HT channel that we should try upgrading to.
|
|
* If we can do 40MHz then this'll upgrade it appropriately.
|
|
*/
|
|
c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
|
|
vap->iv_flags_ht);
|
|
frm = ieee80211_add_htcap_ch(frm, vap, c);
|
|
}
|
|
|
|
/*
|
|
* XXX TODO: need to figure out what/how to update the
|
|
* VHT channel.
|
|
*/
|
|
#if 0
|
|
(vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
|
|
struct ieee80211_channel *c;
|
|
|
|
c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
|
|
vap->iv_flags_ht);
|
|
c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht);
|
|
frm = ieee80211_add_vhtcap_ch(frm, vap, c);
|
|
}
|
|
#endif
|
|
|
|
frm = ieee80211_add_wpa(frm, vap);
|
|
if (vap->iv_appie_probereq != NULL)
|
|
frm = add_appie(frm, vap->iv_appie_probereq);
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
|
|
|
|
KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
|
|
("leading space %zd", M_LEADINGSPACE(m)));
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
|
|
if (m == NULL) {
|
|
/* NB: cannot happen */
|
|
ieee80211_free_node(ni);
|
|
ieee80211_free_node(bss);
|
|
return ENOMEM;
|
|
}
|
|
|
|
IEEE80211_TX_LOCK(ic);
|
|
ieee80211_send_setup(ni, m,
|
|
IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
|
|
IEEE80211_NONQOS_TID, sa, da, bssid);
|
|
/* XXX power management? */
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
|
|
M_WME_SETAC(m, WME_AC_BE);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_probereq);
|
|
IEEE80211_NODE_STAT(ni, tx_mgmt);
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
|
|
"send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n",
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan),
|
|
ether_sprintf(bssid),
|
|
sa, ":",
|
|
da, ":",
|
|
ssidlen, ssid);
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
params.ibp_pri = M_WME_GETAC(m);
|
|
tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
|
|
params.ibp_rate0 = tp->mgmtrate;
|
|
if (IEEE80211_IS_MULTICAST(da)) {
|
|
params.ibp_flags |= IEEE80211_BPF_NOACK;
|
|
params.ibp_try0 = 1;
|
|
} else
|
|
params.ibp_try0 = tp->maxretry;
|
|
params.ibp_power = ni->ni_txpower;
|
|
ret = ieee80211_raw_output(vap, ni, m, ¶ms);
|
|
IEEE80211_TX_UNLOCK(ic);
|
|
ieee80211_free_node(bss);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Calculate capability information for mgt frames.
|
|
*/
|
|
uint16_t
|
|
ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
uint16_t capinfo;
|
|
|
|
KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode"));
|
|
|
|
if (vap->iv_opmode == IEEE80211_M_HOSTAP)
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
else if (vap->iv_opmode == IEEE80211_M_IBSS)
|
|
capinfo = IEEE80211_CAPINFO_IBSS;
|
|
else
|
|
capinfo = 0;
|
|
if (vap->iv_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;
|
|
if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH))
|
|
capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
|
|
return capinfo;
|
|
}
|
|
|
|
/*
|
|
* 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 ieee80211_node *ni, int type, int arg)
|
|
{
|
|
#define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT)
|
|
#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_node *bss = vap->iv_bss;
|
|
struct ieee80211_bpf_params params;
|
|
struct mbuf *m;
|
|
uint8_t *frm;
|
|
uint16_t capinfo;
|
|
int has_challenge, is_shared_key, ret, 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(vap, 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);
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
switch (type) {
|
|
|
|
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 &&
|
|
bss->ni_authmode == IEEE80211_AUTH_SHARED);
|
|
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
3 * sizeof(uint16_t)
|
|
+ (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
|
|
sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
((uint16_t *)frm)[0] =
|
|
(is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
|
|
: htole16(IEEE80211_AUTH_ALG_OPEN);
|
|
((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
|
|
((uint16_t *)frm)[2] = htole16(status);/* status */
|
|
|
|
if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
|
|
((uint16_t *)frm)[3] =
|
|
htole16((IEEE80211_CHALLENGE_LEN << 8) |
|
|
IEEE80211_ELEMID_CHALLENGE);
|
|
memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
|
|
IEEE80211_CHALLENGE_LEN);
|
|
m->m_pkthdr.len = m->m_len =
|
|
4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
|
|
if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
|
|
"request encrypt frame (%s)", __func__);
|
|
/* mark frame for encryption */
|
|
params.ibp_flags |= IEEE80211_BPF_CRYPTO;
|
|
}
|
|
} else
|
|
m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_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);
|
|
|
|
if (vap->iv_opmode == IEEE80211_M_STA)
|
|
ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
|
|
(void *) vap->iv_state);
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
|
|
"send station deauthenticate (reason: %d (%s))", arg,
|
|
ieee80211_reason_to_string(arg));
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
sizeof(uint16_t));
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
*(uint16_t *)frm = htole16(arg); /* reason */
|
|
m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_deauth);
|
|
IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
|
|
|
|
ieee80211_node_unauthorize(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
|
|
* [4] power capability (optional)
|
|
* [28] supported channels (optional)
|
|
* [tlv] HT capabilities
|
|
* [tlv] VHT capabilities
|
|
* [tlv] WME (optional)
|
|
* [tlv] Vendor OUI HT capabilities (optional)
|
|
* [tlv] Atheros capabilities (if negotiated)
|
|
* [tlv] AppIE's (optional)
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
sizeof(uint16_t)
|
|
+ sizeof(uint16_t)
|
|
+ IEEE80211_ADDR_LEN
|
|
+ 2 + IEEE80211_NWID_LEN
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ 4
|
|
+ 2 + 26
|
|
+ sizeof(struct ieee80211_wme_info)
|
|
+ sizeof(struct ieee80211_ie_htcap)
|
|
+ sizeof(struct ieee80211_ie_vhtcap)
|
|
+ 4 + sizeof(struct ieee80211_ie_htcap)
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
+ sizeof(struct ieee80211_ath_ie)
|
|
#endif
|
|
+ (vap->iv_appie_wpa != NULL ?
|
|
vap->iv_appie_wpa->ie_len : 0)
|
|
+ (vap->iv_appie_assocreq != NULL ?
|
|
vap->iv_appie_assocreq->ie_len : 0)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
KASSERT(vap->iv_opmode == IEEE80211_M_STA,
|
|
("wrong mode %u", vap->iv_opmode));
|
|
capinfo = IEEE80211_CAPINFO_ESS;
|
|
if (vap->iv_flags & IEEE80211_F_PRIVACY)
|
|
capinfo |= IEEE80211_CAPINFO_PRIVACY;
|
|
/*
|
|
* NB: Some 11a AP's reject the request when
|
|
* short preamble is set.
|
|
*/
|
|
if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
|
|
IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
|
|
if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
|
|
(ic->ic_caps & IEEE80211_C_SHSLOT))
|
|
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
|
|
if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) &&
|
|
(vap->iv_flags & IEEE80211_F_DOTH))
|
|
capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
|
|
*(uint16_t *)frm = htole16(capinfo);
|
|
frm += 2;
|
|
|
|
KASSERT(bss->ni_intval != 0, ("beacon interval is zero!"));
|
|
*(uint16_t *)frm = htole16(howmany(ic->ic_lintval,
|
|
bss->ni_intval));
|
|
frm += 2;
|
|
|
|
if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
|
|
IEEE80211_ADDR_COPY(frm, 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_rsn(frm, vap);
|
|
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
|
|
if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) {
|
|
frm = ieee80211_add_powercapability(frm,
|
|
ic->ic_curchan);
|
|
frm = ieee80211_add_supportedchannels(frm, ic);
|
|
}
|
|
|
|
/*
|
|
* Check the channel - we may be using an 11n NIC with an
|
|
* 11n capable station, but we're configured to be an 11b
|
|
* channel.
|
|
*/
|
|
if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
|
|
IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
|
|
ni->ni_ies.htcap_ie != NULL &&
|
|
ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) {
|
|
frm = ieee80211_add_htcap(frm, ni);
|
|
}
|
|
|
|
if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) &&
|
|
IEEE80211_IS_CHAN_VHT(ni->ni_chan) &&
|
|
ni->ni_ies.vhtcap_ie != NULL &&
|
|
ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) {
|
|
frm = ieee80211_add_vhtcap(frm, ni);
|
|
}
|
|
|
|
frm = ieee80211_add_wpa(frm, vap);
|
|
if ((ic->ic_flags & IEEE80211_F_WME) &&
|
|
ni->ni_ies.wme_ie != NULL)
|
|
frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
|
|
|
|
/*
|
|
* Same deal - only send HT info if we're on an 11n
|
|
* capable channel.
|
|
*/
|
|
if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
|
|
IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
|
|
ni->ni_ies.htcap_ie != NULL &&
|
|
ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) {
|
|
frm = ieee80211_add_htcap_vendor(frm, ni);
|
|
}
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) {
|
|
frm = ieee80211_add_ath(frm,
|
|
IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
|
|
((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
|
|
ni->ni_authmode != IEEE80211_AUTH_8021X) ?
|
|
vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
|
|
}
|
|
#endif /* IEEE80211_SUPPORT_SUPERG */
|
|
if (vap->iv_appie_assocreq != NULL)
|
|
frm = add_appie(frm, vap->iv_appie_assocreq);
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
|
|
|
|
ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
|
|
(void *) vap->iv_state);
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
|
|
/*
|
|
* asresp frame format
|
|
* [2] capability information
|
|
* [2] status
|
|
* [2] association ID
|
|
* [tlv] supported rates
|
|
* [tlv] extended supported rates
|
|
* [tlv] HT capabilities (standard, if STA enabled)
|
|
* [tlv] HT information (standard, if STA enabled)
|
|
* [tlv] VHT capabilities (standard, if STA enabled)
|
|
* [tlv] VHT information (standard, if STA enabled)
|
|
* [tlv] WME (if configured and STA enabled)
|
|
* [tlv] HT capabilities (vendor OUI, if STA enabled)
|
|
* [tlv] HT information (vendor OUI, if STA enabled)
|
|
* [tlv] Atheros capabilities (if STA enabled)
|
|
* [tlv] AppIE's (optional)
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
sizeof(uint16_t)
|
|
+ sizeof(uint16_t)
|
|
+ sizeof(uint16_t)
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ sizeof(struct ieee80211_ie_htcap) + 4
|
|
+ sizeof(struct ieee80211_ie_htinfo) + 4
|
|
+ sizeof(struct ieee80211_ie_vhtcap)
|
|
+ sizeof(struct ieee80211_ie_vht_operation)
|
|
+ sizeof(struct ieee80211_wme_param)
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
+ sizeof(struct ieee80211_ath_ie)
|
|
#endif
|
|
+ (vap->iv_appie_assocresp != NULL ?
|
|
vap->iv_appie_assocresp->ie_len : 0)
|
|
);
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
|
|
capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
|
|
*(uint16_t *)frm = htole16(capinfo);
|
|
frm += 2;
|
|
|
|
*(uint16_t *)frm = htole16(arg); /* status */
|
|
frm += 2;
|
|
|
|
if (arg == IEEE80211_STATUS_SUCCESS) {
|
|
*(uint16_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);
|
|
/* NB: respond according to what we received */
|
|
if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) {
|
|
frm = ieee80211_add_htcap(frm, ni);
|
|
frm = ieee80211_add_htinfo(frm, ni);
|
|
}
|
|
if ((vap->iv_flags & IEEE80211_F_WME) &&
|
|
ni->ni_ies.wme_ie != NULL)
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
|
if ((ni->ni_flags & HTFLAGS) == HTFLAGS) {
|
|
frm = ieee80211_add_htcap_vendor(frm, ni);
|
|
frm = ieee80211_add_htinfo_vendor(frm, ni);
|
|
}
|
|
if (ni->ni_flags & IEEE80211_NODE_VHT) {
|
|
frm = ieee80211_add_vhtcap(frm, ni);
|
|
frm = ieee80211_add_vhtinfo(frm, ni);
|
|
}
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
|
|
frm = ieee80211_add_ath(frm,
|
|
IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
|
|
((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
|
|
ni->ni_authmode != IEEE80211_AUTH_8021X) ?
|
|
vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
|
|
#endif /* IEEE80211_SUPPORT_SUPERG */
|
|
if (vap->iv_appie_assocresp != NULL)
|
|
frm = add_appie(frm, vap->iv_appie_assocresp);
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC:
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
|
|
"send station disassociate (reason: %d (%s))", arg,
|
|
ieee80211_reason_to_string(arg));
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
sizeof(uint16_t));
|
|
if (m == NULL)
|
|
senderr(ENOMEM, is_tx_nobuf);
|
|
*(uint16_t *)frm = htole16(arg); /* reason */
|
|
m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
|
|
|
|
IEEE80211_NODE_STAT(ni, tx_disassoc);
|
|
IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
|
|
break;
|
|
|
|
default:
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni,
|
|
"invalid mgmt frame type %u", type);
|
|
senderr(EINVAL, is_tx_unknownmgt);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* NB: force non-ProbeResp frames to the highest queue */
|
|
params.ibp_pri = WME_AC_VO;
|
|
params.ibp_rate0 = bss->ni_txparms->mgmtrate;
|
|
/* NB: we know all frames are unicast */
|
|
params.ibp_try0 = bss->ni_txparms->maxretry;
|
|
params.ibp_power = bss->ni_txpower;
|
|
return ieee80211_mgmt_output(ni, m, type, ¶ms);
|
|
bad:
|
|
ieee80211_free_node(ni);
|
|
return ret;
|
|
#undef senderr
|
|
#undef HTFLAGS
|
|
}
|
|
|
|
/*
|
|
* Return an mbuf with a probe response frame in it.
|
|
* Space is left to prepend and 802.11 header at the
|
|
* front but it's left to the caller to fill in.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
|
|
{
|
|
struct ieee80211vap *vap = bss->ni_vap;
|
|
struct ieee80211com *ic = bss->ni_ic;
|
|
const struct ieee80211_rateset *rs;
|
|
struct mbuf *m;
|
|
uint16_t capinfo;
|
|
uint8_t *frm;
|
|
|
|
/*
|
|
* 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] country (optional)
|
|
* [3] power control (optional)
|
|
* [5] channel switch announcement (CSA) (optional)
|
|
* [tlv] extended rate phy (ERP)
|
|
* [tlv] extended supported rates
|
|
* [tlv] RSN (optional)
|
|
* [tlv] HT capabilities
|
|
* [tlv] HT information
|
|
* [tlv] VHT capabilities
|
|
* [tlv] VHT information
|
|
* [tlv] WPA (optional)
|
|
* [tlv] WME (optional)
|
|
* [tlv] Vendor OUI HT capabilities (optional)
|
|
* [tlv] Vendor OUI HT information (optional)
|
|
* [tlv] Atheros capabilities
|
|
* [tlv] AppIE's (optional)
|
|
* [tlv] Mesh ID (MBSS)
|
|
* [tlv] Mesh Conf (MBSS)
|
|
*/
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame),
|
|
8
|
|
+ sizeof(uint16_t)
|
|
+ sizeof(uint16_t)
|
|
+ 2 + IEEE80211_NWID_LEN
|
|
+ 2 + IEEE80211_RATE_SIZE
|
|
+ 7 /* max(7,3) */
|
|
+ IEEE80211_COUNTRY_MAX_SIZE
|
|
+ 3
|
|
+ sizeof(struct ieee80211_csa_ie)
|
|
+ sizeof(struct ieee80211_quiet_ie)
|
|
+ 3
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ sizeof(struct ieee80211_ie_wpa)
|
|
+ sizeof(struct ieee80211_ie_htcap)
|
|
+ sizeof(struct ieee80211_ie_htinfo)
|
|
+ sizeof(struct ieee80211_ie_wpa)
|
|
+ sizeof(struct ieee80211_wme_param)
|
|
+ 4 + sizeof(struct ieee80211_ie_htcap)
|
|
+ 4 + sizeof(struct ieee80211_ie_htinfo)
|
|
+ sizeof(struct ieee80211_ie_vhtcap)
|
|
+ sizeof(struct ieee80211_ie_vht_operation)
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
+ sizeof(struct ieee80211_ath_ie)
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
+ 2 + IEEE80211_MESHID_LEN
|
|
+ sizeof(struct ieee80211_meshconf_ie)
|
|
#endif
|
|
+ (vap->iv_appie_proberesp != NULL ?
|
|
vap->iv_appie_proberesp->ie_len : 0)
|
|
);
|
|
if (m == NULL) {
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
return NULL;
|
|
}
|
|
|
|
memset(frm, 0, 8); /* timestamp should be filled later */
|
|
frm += 8;
|
|
*(uint16_t *)frm = htole16(bss->ni_intval);
|
|
frm += 2;
|
|
capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
|
|
*(uint16_t *)frm = htole16(capinfo);
|
|
frm += 2;
|
|
|
|
frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen);
|
|
rs = ieee80211_get_suprates(ic, bss->ni_chan);
|
|
frm = ieee80211_add_rates(frm, rs);
|
|
|
|
if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) {
|
|
*frm++ = IEEE80211_ELEMID_FHPARMS;
|
|
*frm++ = 5;
|
|
*frm++ = bss->ni_fhdwell & 0x00ff;
|
|
*frm++ = (bss->ni_fhdwell >> 8) & 0x00ff;
|
|
*frm++ = IEEE80211_FH_CHANSET(
|
|
ieee80211_chan2ieee(ic, bss->ni_chan));
|
|
*frm++ = IEEE80211_FH_CHANPAT(
|
|
ieee80211_chan2ieee(ic, bss->ni_chan));
|
|
*frm++ = bss->ni_fhindex;
|
|
} else {
|
|
*frm++ = IEEE80211_ELEMID_DSPARMS;
|
|
*frm++ = 1;
|
|
*frm++ = ieee80211_chan2ieee(ic, bss->ni_chan);
|
|
}
|
|
|
|
if (vap->iv_opmode == IEEE80211_M_IBSS) {
|
|
*frm++ = IEEE80211_ELEMID_IBSSPARMS;
|
|
*frm++ = 2;
|
|
*frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
|
|
}
|
|
if ((vap->iv_flags & IEEE80211_F_DOTH) ||
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
|
|
frm = ieee80211_add_countryie(frm, ic);
|
|
if (vap->iv_flags & IEEE80211_F_DOTH) {
|
|
if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan))
|
|
frm = ieee80211_add_powerconstraint(frm, vap);
|
|
if (ic->ic_flags & IEEE80211_F_CSAPENDING)
|
|
frm = ieee80211_add_csa(frm, vap);
|
|
}
|
|
if (vap->iv_flags & IEEE80211_F_DOTH) {
|
|
if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
|
|
if (vap->iv_quiet)
|
|
frm = ieee80211_add_quiet(frm, vap, 0);
|
|
}
|
|
}
|
|
if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan))
|
|
frm = ieee80211_add_erp(frm, ic);
|
|
frm = ieee80211_add_xrates(frm, rs);
|
|
frm = ieee80211_add_rsn(frm, vap);
|
|
/*
|
|
* NB: legacy 11b clients do not get certain ie's.
|
|
* The caller identifies such clients by passing
|
|
* a token in legacy to us. Could expand this to be
|
|
* any legacy client for stuff like HT ie's.
|
|
*/
|
|
if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
|
|
legacy != IEEE80211_SEND_LEGACY_11B) {
|
|
frm = ieee80211_add_htcap(frm, bss);
|
|
frm = ieee80211_add_htinfo(frm, bss);
|
|
}
|
|
if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) &&
|
|
legacy != IEEE80211_SEND_LEGACY_11B) {
|
|
frm = ieee80211_add_vhtcap(frm, bss);
|
|
frm = ieee80211_add_vhtinfo(frm, bss);
|
|
}
|
|
frm = ieee80211_add_wpa(frm, vap);
|
|
if (vap->iv_flags & IEEE80211_F_WME)
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
|
if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
|
|
(vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) &&
|
|
legacy != IEEE80211_SEND_LEGACY_11B) {
|
|
frm = ieee80211_add_htcap_vendor(frm, bss);
|
|
frm = ieee80211_add_htinfo_vendor(frm, bss);
|
|
}
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if ((vap->iv_flags & IEEE80211_F_ATHEROS) &&
|
|
legacy != IEEE80211_SEND_LEGACY_11B)
|
|
frm = ieee80211_add_athcaps(frm, bss);
|
|
#endif
|
|
if (vap->iv_appie_proberesp != NULL)
|
|
frm = add_appie(frm, vap->iv_appie_proberesp);
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS) {
|
|
frm = ieee80211_add_meshid(frm, vap);
|
|
frm = ieee80211_add_meshconf(frm, vap);
|
|
}
|
|
#endif
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Send a probe response frame to the specified mac address.
|
|
* This does not go through the normal mgt frame api so we
|
|
* can specify the destination address and re-use the bss node
|
|
* for the sta reference.
|
|
*/
|
|
int
|
|
ieee80211_send_proberesp(struct ieee80211vap *vap,
|
|
const uint8_t da[IEEE80211_ADDR_LEN], int legacy)
|
|
{
|
|
struct ieee80211_node *bss = vap->iv_bss;
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct mbuf *m;
|
|
int ret;
|
|
|
|
if (vap->iv_state == IEEE80211_S_CAC) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss,
|
|
"block %s frame in CAC state", "probe response");
|
|
vap->iv_stats.is_tx_badstate++;
|
|
return EIO; /* XXX */
|
|
}
|
|
|
|
/*
|
|
* 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(vap, IEEE80211_MSG_NODE,
|
|
"ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
|
|
__func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr),
|
|
ieee80211_node_refcnt(bss)+1);
|
|
ieee80211_ref_node(bss);
|
|
|
|
m = ieee80211_alloc_proberesp(bss, legacy);
|
|
if (m == NULL) {
|
|
ieee80211_free_node(bss);
|
|
return ENOMEM;
|
|
}
|
|
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
|
|
KASSERT(m != NULL, ("no room for header"));
|
|
|
|
IEEE80211_TX_LOCK(ic);
|
|
ieee80211_send_setup(bss, m,
|
|
IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
|
|
IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid);
|
|
/* XXX power management? */
|
|
m->m_flags |= M_ENCAP; /* mark encapsulated */
|
|
|
|
M_WME_SETAC(m, WME_AC_BE);
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
|
|
"send probe resp on channel %u to %s%s\n",
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da),
|
|
legacy ? " <legacy>" : "");
|
|
IEEE80211_NODE_STAT(bss, tx_mgmt);
|
|
|
|
ret = ieee80211_raw_output(vap, bss, m, NULL);
|
|
IEEE80211_TX_UNLOCK(ic);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* Allocate and build a RTS (Request To Send) control frame.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_alloc_rts(struct ieee80211com *ic,
|
|
const uint8_t ra[IEEE80211_ADDR_LEN],
|
|
const uint8_t ta[IEEE80211_ADDR_LEN],
|
|
uint16_t dur)
|
|
{
|
|
struct ieee80211_frame_rts *rts;
|
|
struct mbuf *m;
|
|
|
|
/* XXX honor ic_headroom */
|
|
m = m_gethdr(M_NOWAIT, MT_DATA);
|
|
if (m != NULL) {
|
|
rts = mtod(m, struct ieee80211_frame_rts *);
|
|
rts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
|
|
IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS;
|
|
rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
|
|
*(u_int16_t *)rts->i_dur = htole16(dur);
|
|
IEEE80211_ADDR_COPY(rts->i_ra, ra);
|
|
IEEE80211_ADDR_COPY(rts->i_ta, ta);
|
|
|
|
m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
|
|
}
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Allocate and build a CTS (Clear To Send) control frame.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_alloc_cts(struct ieee80211com *ic,
|
|
const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur)
|
|
{
|
|
struct ieee80211_frame_cts *cts;
|
|
struct mbuf *m;
|
|
|
|
/* XXX honor ic_headroom */
|
|
m = m_gethdr(M_NOWAIT, MT_DATA);
|
|
if (m != NULL) {
|
|
cts = mtod(m, struct ieee80211_frame_cts *);
|
|
cts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
|
|
IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS;
|
|
cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
|
|
*(u_int16_t *)cts->i_dur = htole16(dur);
|
|
IEEE80211_ADDR_COPY(cts->i_ra, ra);
|
|
|
|
m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
|
|
}
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Wrapper for CTS/RTS frame allocation.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_alloc_prot(struct ieee80211_node *ni, const struct mbuf *m,
|
|
uint8_t rate, int prot)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
const struct ieee80211_frame *wh;
|
|
struct mbuf *mprot;
|
|
uint16_t dur;
|
|
int pktlen, isshort;
|
|
|
|
KASSERT(prot == IEEE80211_PROT_RTSCTS ||
|
|
prot == IEEE80211_PROT_CTSONLY,
|
|
("wrong protection type %d", prot));
|
|
|
|
wh = mtod(m, const struct ieee80211_frame *);
|
|
pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN;
|
|
isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0;
|
|
dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort)
|
|
+ ieee80211_ack_duration(ic->ic_rt, rate, isshort);
|
|
|
|
if (prot == IEEE80211_PROT_RTSCTS) {
|
|
/* NB: CTS is the same size as an ACK */
|
|
dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort);
|
|
mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur);
|
|
} else
|
|
mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur);
|
|
|
|
return (mprot);
|
|
}
|
|
|
|
static void
|
|
ieee80211_tx_mgt_timeout(void *arg)
|
|
{
|
|
struct ieee80211vap *vap = arg;
|
|
|
|
IEEE80211_LOCK(vap->iv_ic);
|
|
if (vap->iv_state != IEEE80211_S_INIT &&
|
|
(vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
|
|
/*
|
|
* NB: it's safe to specify a timeout as the reason here;
|
|
* it'll only be used in the right state.
|
|
*/
|
|
ieee80211_new_state_locked(vap, IEEE80211_S_SCAN,
|
|
IEEE80211_SCAN_FAIL_TIMEOUT);
|
|
}
|
|
IEEE80211_UNLOCK(vap->iv_ic);
|
|
}
|
|
|
|
/*
|
|
* This is the callback set on net80211-sourced transmitted
|
|
* authentication request frames.
|
|
*
|
|
* This does a couple of things:
|
|
*
|
|
* + If the frame transmitted was a success, it schedules a future
|
|
* event which will transition the interface to scan.
|
|
* If a state transition _then_ occurs before that event occurs,
|
|
* said state transition will cancel this callout.
|
|
*
|
|
* + If the frame transmit was a failure, it immediately schedules
|
|
* the transition back to scan.
|
|
*/
|
|
static void
|
|
ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
enum ieee80211_state ostate = (enum ieee80211_state)(uintptr_t)arg;
|
|
|
|
/*
|
|
* Frame transmit completed; arrange timer callback. If
|
|
* transmit was successfully we wait for response. Otherwise
|
|
* we arrange an immediate callback instead of doing the
|
|
* callback directly since we don't know what state the driver
|
|
* is in (e.g. what locks it is holding). This work should
|
|
* not be too time-critical and not happen too often so the
|
|
* added overhead is acceptable.
|
|
*
|
|
* XXX what happens if !acked but response shows up before callback?
|
|
*/
|
|
if (vap->iv_state == ostate) {
|
|
callout_reset(&vap->iv_mgtsend,
|
|
status == 0 ? IEEE80211_TRANS_WAIT*hz : 0,
|
|
ieee80211_tx_mgt_timeout, vap);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
|
|
struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_rateset *rs = &ni->ni_rates;
|
|
uint16_t capinfo;
|
|
|
|
/*
|
|
* beacon frame format
|
|
*
|
|
* TODO: update to 802.11-2012; a lot of stuff has changed;
|
|
* vendor extensions should be at the end, etc.
|
|
*
|
|
* [8] time stamp
|
|
* [2] beacon interval
|
|
* [2] cabability information
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [3] parameter set (DS)
|
|
* [8] CF parameter set (optional)
|
|
* [tlv] parameter set (IBSS/TIM)
|
|
* [tlv] country (optional)
|
|
* [3] power control (optional)
|
|
* [5] channel switch announcement (CSA) (optional)
|
|
* XXX TODO: Quiet
|
|
* XXX TODO: IBSS DFS
|
|
* XXX TODO: TPC report
|
|
* [tlv] extended rate phy (ERP)
|
|
* [tlv] extended supported rates
|
|
* [tlv] RSN parameters
|
|
* XXX TODO: BSSLOAD
|
|
* (XXX EDCA parameter set, QoS capability?)
|
|
* XXX TODO: AP channel report
|
|
*
|
|
* [tlv] HT capabilities
|
|
* [tlv] HT information
|
|
* XXX TODO: 20/40 BSS coexistence
|
|
* Mesh:
|
|
* XXX TODO: Meshid
|
|
* XXX TODO: mesh config
|
|
* XXX TODO: mesh awake window
|
|
* XXX TODO: beacon timing (mesh, etc)
|
|
* XXX TODO: MCCAOP Advertisement Overview
|
|
* XXX TODO: MCCAOP Advertisement
|
|
* XXX TODO: Mesh channel switch parameters
|
|
* VHT:
|
|
* XXX TODO: VHT capabilities
|
|
* XXX TODO: VHT operation
|
|
* XXX TODO: VHT transmit power envelope
|
|
* XXX TODO: channel switch wrapper element
|
|
* XXX TODO: extended BSS load element
|
|
*
|
|
* XXX Vendor-specific OIDs (e.g. Atheros)
|
|
* [tlv] WPA parameters
|
|
* [tlv] WME parameters
|
|
* [tlv] Vendor OUI HT capabilities (optional)
|
|
* [tlv] Vendor OUI HT information (optional)
|
|
* [tlv] Atheros capabilities (optional)
|
|
* [tlv] TDMA parameters (optional)
|
|
* [tlv] Mesh ID (MBSS)
|
|
* [tlv] Mesh Conf (MBSS)
|
|
* [tlv] application data (optional)
|
|
*/
|
|
|
|
memset(bo, 0, sizeof(*bo));
|
|
|
|
memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
|
|
frm += 8;
|
|
*(uint16_t *)frm = htole16(ni->ni_intval);
|
|
frm += 2;
|
|
capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
|
|
bo->bo_caps = (uint16_t *)frm;
|
|
*(uint16_t *)frm = htole16(capinfo);
|
|
frm += 2;
|
|
*frm++ = IEEE80211_ELEMID_SSID;
|
|
if ((vap->iv_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 (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) {
|
|
*frm++ = IEEE80211_ELEMID_DSPARMS;
|
|
*frm++ = 1;
|
|
*frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
|
|
}
|
|
if (ic->ic_flags & IEEE80211_F_PCF) {
|
|
bo->bo_cfp = frm;
|
|
frm = ieee80211_add_cfparms(frm, ic);
|
|
}
|
|
bo->bo_tim = frm;
|
|
if (vap->iv_opmode == IEEE80211_M_IBSS) {
|
|
*frm++ = IEEE80211_ELEMID_IBSSPARMS;
|
|
*frm++ = 2;
|
|
*frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
|
|
bo->bo_tim_len = 0;
|
|
} else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
|
|
vap->iv_opmode == IEEE80211_M_MBSS) {
|
|
/* TIM IE is the same for Mesh and Hostap */
|
|
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 = vap->iv_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_tim_trailer = frm;
|
|
if ((vap->iv_flags & IEEE80211_F_DOTH) ||
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
|
|
frm = ieee80211_add_countryie(frm, ic);
|
|
if (vap->iv_flags & IEEE80211_F_DOTH) {
|
|
if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
|
|
frm = ieee80211_add_powerconstraint(frm, vap);
|
|
bo->bo_csa = frm;
|
|
if (ic->ic_flags & IEEE80211_F_CSAPENDING)
|
|
frm = ieee80211_add_csa(frm, vap);
|
|
} else
|
|
bo->bo_csa = frm;
|
|
|
|
bo->bo_quiet = NULL;
|
|
if (vap->iv_flags & IEEE80211_F_DOTH) {
|
|
if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
|
|
(vap->iv_quiet == 1)) {
|
|
/*
|
|
* We only insert the quiet IE offset if
|
|
* the quiet IE is enabled. Otherwise don't
|
|
* put it here or we'll just overwrite
|
|
* some other beacon contents.
|
|
*/
|
|
if (vap->iv_quiet) {
|
|
bo->bo_quiet = frm;
|
|
frm = ieee80211_add_quiet(frm,vap, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) {
|
|
bo->bo_erp = frm;
|
|
frm = ieee80211_add_erp(frm, ic);
|
|
}
|
|
frm = ieee80211_add_xrates(frm, rs);
|
|
frm = ieee80211_add_rsn(frm, vap);
|
|
if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
|
|
frm = ieee80211_add_htcap(frm, ni);
|
|
bo->bo_htinfo = frm;
|
|
frm = ieee80211_add_htinfo(frm, ni);
|
|
}
|
|
|
|
if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) {
|
|
frm = ieee80211_add_vhtcap(frm, ni);
|
|
bo->bo_vhtinfo = frm;
|
|
frm = ieee80211_add_vhtinfo(frm, ni);
|
|
/* Transmit power envelope */
|
|
/* Channel switch wrapper element */
|
|
/* Extended bss load element */
|
|
}
|
|
|
|
frm = ieee80211_add_wpa(frm, vap);
|
|
if (vap->iv_flags & IEEE80211_F_WME) {
|
|
bo->bo_wme = frm;
|
|
frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
|
|
}
|
|
if (IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
|
|
(vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) {
|
|
frm = ieee80211_add_htcap_vendor(frm, ni);
|
|
frm = ieee80211_add_htinfo_vendor(frm, ni);
|
|
}
|
|
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (vap->iv_flags & IEEE80211_F_ATHEROS) {
|
|
bo->bo_ath = frm;
|
|
frm = ieee80211_add_athcaps(frm, ni);
|
|
}
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
if (vap->iv_caps & IEEE80211_C_TDMA) {
|
|
bo->bo_tdma = frm;
|
|
frm = ieee80211_add_tdma(frm, vap);
|
|
}
|
|
#endif
|
|
if (vap->iv_appie_beacon != NULL) {
|
|
bo->bo_appie = frm;
|
|
bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
|
|
frm = add_appie(frm, vap->iv_appie_beacon);
|
|
}
|
|
|
|
/* XXX TODO: move meshid/meshconf up to before vendor extensions? */
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS) {
|
|
frm = ieee80211_add_meshid(frm, vap);
|
|
bo->bo_meshconf = frm;
|
|
frm = ieee80211_add_meshconf(frm, vap);
|
|
}
|
|
#endif
|
|
bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer;
|
|
bo->bo_csa_trailer_len = frm - bo->bo_csa;
|
|
m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
|
|
}
|
|
|
|
/*
|
|
* Allocate a beacon frame and fillin the appropriate bits.
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_beacon_alloc(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
struct ieee80211_frame *wh;
|
|
struct mbuf *m;
|
|
int pktlen;
|
|
uint8_t *frm;
|
|
|
|
/*
|
|
* Update the "We're putting the quiet IE in the beacon" state.
|
|
*/
|
|
if (vap->iv_quiet == 1)
|
|
vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
|
|
else if (vap->iv_quiet == 0)
|
|
vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
|
|
|
|
/*
|
|
* beacon frame format
|
|
*
|
|
* Note: This needs updating for 802.11-2012.
|
|
*
|
|
* [8] time stamp
|
|
* [2] beacon interval
|
|
* [2] cabability information
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [3] parameter set (DS)
|
|
* [8] CF parameter set (optional)
|
|
* [tlv] parameter set (IBSS/TIM)
|
|
* [tlv] country (optional)
|
|
* [3] power control (optional)
|
|
* [5] channel switch announcement (CSA) (optional)
|
|
* [tlv] extended rate phy (ERP)
|
|
* [tlv] extended supported rates
|
|
* [tlv] RSN parameters
|
|
* [tlv] HT capabilities
|
|
* [tlv] HT information
|
|
* [tlv] VHT capabilities
|
|
* [tlv] VHT operation
|
|
* [tlv] Vendor OUI HT capabilities (optional)
|
|
* [tlv] Vendor OUI HT information (optional)
|
|
* XXX Vendor-specific OIDs (e.g. Atheros)
|
|
* [tlv] WPA parameters
|
|
* [tlv] WME parameters
|
|
* [tlv] TDMA parameters (optional)
|
|
* [tlv] Mesh ID (MBSS)
|
|
* [tlv] Mesh Conf (MBSS)
|
|
* [tlv] application data (optional)
|
|
* NB: we allocate the max space required for the TIM bitmap.
|
|
* XXX how big is this?
|
|
*/
|
|
pktlen = 8 /* time stamp */
|
|
+ sizeof(uint16_t) /* beacon interval */
|
|
+ sizeof(uint16_t) /* capabilities */
|
|
+ 2 + ni->ni_esslen /* ssid */
|
|
+ 2 + IEEE80211_RATE_SIZE /* supported rates */
|
|
+ 2 + 1 /* DS parameters */
|
|
+ 2 + 6 /* CF parameters */
|
|
+ 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */
|
|
+ IEEE80211_COUNTRY_MAX_SIZE /* country */
|
|
+ 2 + 1 /* power control */
|
|
+ sizeof(struct ieee80211_csa_ie) /* CSA */
|
|
+ sizeof(struct ieee80211_quiet_ie) /* Quiet */
|
|
+ 2 + 1 /* ERP */
|
|
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
|
|
+ (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
|
|
2*sizeof(struct ieee80211_ie_wpa) : 0)
|
|
/* XXX conditional? */
|
|
+ 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */
|
|
+ 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
|
|
+ sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */
|
|
+ sizeof(struct ieee80211_ie_vht_operation)/* VHT info */
|
|
+ (vap->iv_caps & IEEE80211_C_WME ? /* WME */
|
|
sizeof(struct ieee80211_wme_param) : 0)
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
+ sizeof(struct ieee80211_ath_ie) /* ATH */
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
+ (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */
|
|
sizeof(struct ieee80211_tdma_param) : 0)
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
+ 2 + ni->ni_meshidlen
|
|
+ sizeof(struct ieee80211_meshconf_ie)
|
|
#endif
|
|
+ IEEE80211_MAX_APPIE
|
|
;
|
|
m = ieee80211_getmgtframe(&frm,
|
|
ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen);
|
|
if (m == NULL) {
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
|
|
"%s: cannot get buf; size %u\n", __func__, pktlen);
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
return NULL;
|
|
}
|
|
ieee80211_beacon_construct(m, frm, ni);
|
|
|
|
M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
|
|
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;
|
|
*(uint16_t *)wh->i_dur = 0;
|
|
IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
|
|
IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
|
|
*(uint16_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 ieee80211_node *ni, struct mbuf *m, int mcast)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
int len_changed = 0;
|
|
uint16_t capinfo;
|
|
struct ieee80211_frame *wh;
|
|
ieee80211_seq seqno;
|
|
|
|
IEEE80211_LOCK(ic);
|
|
/*
|
|
* Handle 11h channel change when we've reached the count.
|
|
* We must recalculate the beacon frame contents to account
|
|
* for the new channel. Note we do this only for the first
|
|
* vap that reaches this point; subsequent vaps just update
|
|
* their beacon state to reflect the recalculated channel.
|
|
*/
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) &&
|
|
vap->iv_csa_count == ic->ic_csa_count) {
|
|
vap->iv_csa_count = 0;
|
|
/*
|
|
* Effect channel change before reconstructing the beacon
|
|
* frame contents as many places reference ni_chan.
|
|
*/
|
|
if (ic->ic_csa_newchan != NULL)
|
|
ieee80211_csa_completeswitch(ic);
|
|
/*
|
|
* NB: ieee80211_beacon_construct clears all pending
|
|
* updates in bo_flags so we don't need to explicitly
|
|
* clear IEEE80211_BEACON_CSA.
|
|
*/
|
|
ieee80211_beacon_construct(m,
|
|
mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
|
|
|
|
/* XXX do WME aggressive mode processing? */
|
|
IEEE80211_UNLOCK(ic);
|
|
return 1; /* just assume length changed */
|
|
}
|
|
|
|
/*
|
|
* Handle the quiet time element being added and removed.
|
|
* Again, for now we just cheat and reconstruct the whole
|
|
* beacon - that way the gap is provided as appropriate.
|
|
*
|
|
* So, track whether we have already added the IE versus
|
|
* whether we want to be adding the IE.
|
|
*/
|
|
if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) &&
|
|
(vap->iv_quiet == 0)) {
|
|
/*
|
|
* Quiet time beacon IE enabled, but it's disabled;
|
|
* recalc
|
|
*/
|
|
vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
|
|
ieee80211_beacon_construct(m,
|
|
mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
|
|
/* XXX do WME aggressive mode processing? */
|
|
IEEE80211_UNLOCK(ic);
|
|
return 1; /* just assume length changed */
|
|
}
|
|
|
|
if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) &&
|
|
(vap->iv_quiet == 1)) {
|
|
/*
|
|
* Quiet time beacon IE disabled, but it's now enabled;
|
|
* recalc
|
|
*/
|
|
vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
|
|
ieee80211_beacon_construct(m,
|
|
mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
|
|
/* XXX do WME aggressive mode processing? */
|
|
IEEE80211_UNLOCK(ic);
|
|
return 1; /* just assume length changed */
|
|
}
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
/*
|
|
* XXX TODO Strictly speaking this should be incremented with the TX
|
|
* lock held so as to serialise access to the non-qos TID sequence
|
|
* number space.
|
|
*
|
|
* If the driver identifies it does its own TX seqno management then
|
|
* we can skip this (and still not do the TX seqno.)
|
|
*/
|
|
seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
|
|
*(uint16_t *)&wh->i_seq[0] =
|
|
htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
|
|
M_SEQNO_SET(m, seqno);
|
|
|
|
/* XXX faster to recalculate entirely or just changes? */
|
|
capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
|
|
*bo->bo_caps = htole16(capinfo);
|
|
|
|
if (vap->iv_flags & IEEE80211_F_WME) {
|
|
struct ieee80211_wme_state *wme = &ic->ic_wme;
|
|
|
|
/*
|
|
* Check for aggressive mode change. When there is
|
|
* significant high priority traffic in the BSS
|
|
* throttle back BE traffic by using conservative
|
|
* parameters. Otherwise BE uses aggressive 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(vap, 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(vap);
|
|
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(vap, 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(vap);
|
|
wme->wme_hipri_traffic = 0;
|
|
} else
|
|
wme->wme_hipri_traffic =
|
|
wme->wme_hipri_switch_hysteresis;
|
|
}
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) {
|
|
(void) ieee80211_add_wme_param(bo->bo_wme, wme);
|
|
clrbit(bo->bo_flags, IEEE80211_BEACON_WME);
|
|
}
|
|
}
|
|
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) {
|
|
ieee80211_ht_update_beacon(vap, bo);
|
|
clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
|
|
}
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
if (vap->iv_caps & IEEE80211_C_TDMA) {
|
|
/*
|
|
* NB: the beacon is potentially updated every TBTT.
|
|
*/
|
|
ieee80211_tdma_update_beacon(vap, bo);
|
|
}
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
if (vap->iv_opmode == IEEE80211_M_MBSS)
|
|
ieee80211_mesh_update_beacon(vap, bo);
|
|
#endif
|
|
|
|
if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
|
|
vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/
|
|
struct ieee80211_tim_ie *tie =
|
|
(struct ieee80211_tim_ie *) bo->bo_tim;
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) {
|
|
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 iv_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 (vap->iv_ps_pending != 0) {
|
|
timoff = 128; /* impossibly large */
|
|
for (i = 0; i < vap->iv_tim_len; i++)
|
|
if (vap->iv_tim_bitmap[i]) {
|
|
timoff = i &~ 1;
|
|
break;
|
|
}
|
|
KASSERT(timoff != 128, ("tim bitmap empty!"));
|
|
for (i = vap->iv_tim_len-1; i >= timoff; i--)
|
|
if (vap->iv_tim_bitmap[i])
|
|
break;
|
|
timlen = 1 + (i - timoff);
|
|
} else {
|
|
timoff = 0;
|
|
timlen = 1;
|
|
}
|
|
|
|
/*
|
|
* TODO: validate this!
|
|
*/
|
|
if (timlen != bo->bo_tim_len) {
|
|
/* copy up/down trailer */
|
|
int adjust = tie->tim_bitmap+timlen
|
|
- bo->bo_tim_trailer;
|
|
ovbcopy(bo->bo_tim_trailer,
|
|
bo->bo_tim_trailer+adjust,
|
|
bo->bo_tim_trailer_len);
|
|
bo->bo_tim_trailer += adjust;
|
|
bo->bo_erp += adjust;
|
|
bo->bo_htinfo += adjust;
|
|
bo->bo_vhtinfo += adjust;
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
bo->bo_ath += adjust;
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
bo->bo_tdma += adjust;
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
bo->bo_meshconf += adjust;
|
|
#endif
|
|
bo->bo_appie += adjust;
|
|
bo->bo_wme += adjust;
|
|
bo->bo_csa += adjust;
|
|
bo->bo_quiet += adjust;
|
|
bo->bo_tim_len = timlen;
|
|
|
|
/* update information element */
|
|
tie->tim_len = 3 + timlen;
|
|
tie->tim_bitctl = timoff;
|
|
len_changed = 1;
|
|
}
|
|
memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
|
|
bo->bo_tim_len);
|
|
|
|
clrbit(bo->bo_flags, IEEE80211_BEACON_TIM);
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
|
|
"%s: TIM updated, pending %u, off %u, len %u\n",
|
|
__func__, vap->iv_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 == 0)
|
|
tie->tim_bitctl |= 1;
|
|
else
|
|
tie->tim_bitctl &= ~1;
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) {
|
|
struct ieee80211_csa_ie *csa =
|
|
(struct ieee80211_csa_ie *) bo->bo_csa;
|
|
|
|
/*
|
|
* Insert or update CSA ie. If we're just starting
|
|
* to count down to the channel switch then we need
|
|
* to insert the CSA ie. Otherwise we just need to
|
|
* drop the count. The actual change happens above
|
|
* when the vap's count reaches the target count.
|
|
*/
|
|
if (vap->iv_csa_count == 0) {
|
|
memmove(&csa[1], csa, bo->bo_csa_trailer_len);
|
|
bo->bo_erp += sizeof(*csa);
|
|
bo->bo_htinfo += sizeof(*csa);
|
|
bo->bo_vhtinfo += sizeof(*csa);
|
|
bo->bo_wme += sizeof(*csa);
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
bo->bo_ath += sizeof(*csa);
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
bo->bo_tdma += sizeof(*csa);
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
bo->bo_meshconf += sizeof(*csa);
|
|
#endif
|
|
bo->bo_appie += sizeof(*csa);
|
|
bo->bo_csa_trailer_len += sizeof(*csa);
|
|
bo->bo_quiet += sizeof(*csa);
|
|
bo->bo_tim_trailer_len += sizeof(*csa);
|
|
m->m_len += sizeof(*csa);
|
|
m->m_pkthdr.len += sizeof(*csa);
|
|
|
|
ieee80211_add_csa(bo->bo_csa, vap);
|
|
} else
|
|
csa->csa_count--;
|
|
vap->iv_csa_count++;
|
|
/* NB: don't clear IEEE80211_BEACON_CSA */
|
|
}
|
|
|
|
/*
|
|
* Only add the quiet time IE if we've enabled it
|
|
* as appropriate.
|
|
*/
|
|
if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
|
|
if (vap->iv_quiet &&
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) {
|
|
ieee80211_add_quiet(bo->bo_quiet, vap, 1);
|
|
}
|
|
}
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) {
|
|
/*
|
|
* ERP element needs updating.
|
|
*/
|
|
(void) ieee80211_add_erp(bo->bo_erp, ic);
|
|
clrbit(bo->bo_flags, IEEE80211_BEACON_ERP);
|
|
}
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) {
|
|
ieee80211_add_athcaps(bo->bo_ath, ni);
|
|
clrbit(bo->bo_flags, IEEE80211_BEACON_ATH);
|
|
}
|
|
#endif
|
|
}
|
|
if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) {
|
|
const struct ieee80211_appie *aie = vap->iv_appie_beacon;
|
|
int aielen;
|
|
uint8_t *frm;
|
|
|
|
aielen = 0;
|
|
if (aie != NULL)
|
|
aielen += aie->ie_len;
|
|
if (aielen != bo->bo_appie_len) {
|
|
/* copy up/down trailer */
|
|
int adjust = aielen - bo->bo_appie_len;
|
|
ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust,
|
|
bo->bo_tim_trailer_len);
|
|
bo->bo_tim_trailer += adjust;
|
|
bo->bo_appie += adjust;
|
|
bo->bo_appie_len = aielen;
|
|
|
|
len_changed = 1;
|
|
}
|
|
frm = bo->bo_appie;
|
|
if (aie != NULL)
|
|
frm = add_appie(frm, aie);
|
|
clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE);
|
|
}
|
|
IEEE80211_UNLOCK(ic);
|
|
|
|
return len_changed;
|
|
}
|
|
|
|
/*
|
|
* Do Ethernet-LLC encapsulation for each payload in a fast frame
|
|
* tunnel encapsulation. The frame is assumed to have an Ethernet
|
|
* header at the front that must be stripped before prepending the
|
|
* LLC followed by the Ethernet header passed in (with an Ethernet
|
|
* type that specifies the payload size).
|
|
*/
|
|
struct mbuf *
|
|
ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
|
|
const struct ether_header *eh)
|
|
{
|
|
struct llc *llc;
|
|
uint16_t payload;
|
|
|
|
/* XXX optimize by combining m_adj+M_PREPEND */
|
|
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;
|
|
payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
|
|
|
|
M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT);
|
|
if (m == NULL) { /* XXX cannot happen */
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
|
|
"%s: no space for ether_header\n", __func__);
|
|
vap->iv_stats.is_tx_nobuf++;
|
|
return NULL;
|
|
}
|
|
ETHER_HEADER_COPY(mtod(m, void *), eh);
|
|
mtod(m, struct ether_header *)->ether_type = htons(payload);
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Complete an mbuf transmission.
|
|
*
|
|
* For now, this simply processes a completed frame after the
|
|
* driver has completed it's transmission and/or retransmission.
|
|
* It assumes the frame is an 802.11 encapsulated frame.
|
|
*
|
|
* Later on it will grow to become the exit path for a given frame
|
|
* from the driver and, depending upon how it's been encapsulated
|
|
* and already transmitted, it may end up doing A-MPDU retransmission,
|
|
* power save requeuing, etc.
|
|
*
|
|
* In order for the above to work, the driver entry point to this
|
|
* must not hold any driver locks. Thus, the driver needs to delay
|
|
* any actual mbuf completion until it can release said locks.
|
|
*
|
|
* This frees the mbuf and if the mbuf has a node reference,
|
|
* the node reference will be freed.
|
|
*/
|
|
void
|
|
ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status)
|
|
{
|
|
|
|
if (ni != NULL) {
|
|
struct ifnet *ifp = ni->ni_vap->iv_ifp;
|
|
|
|
if (status == 0) {
|
|
if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
|
|
if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
|
|
if (m->m_flags & M_MCAST)
|
|
if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
|
|
} else
|
|
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
|
|
if (m->m_flags & M_TXCB)
|
|
ieee80211_process_callback(ni, m, status);
|
|
ieee80211_free_node(ni);
|
|
}
|
|
m_freem(m);
|
|
}
|