76039bc84f
to this event, adding if_var.h to files that do need it. Also, include all includes that now are included due to implicit pollution via if_var.h Sponsored by: Netflix Sponsored by: Nginx, Inc.
958 lines
26 KiB
C
958 lines
26 KiB
C
/*-
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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_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/socket.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_input.h>
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#ifdef IEEE80211_SUPPORT_MESH
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#include <net80211/ieee80211_mesh.h>
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#endif
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#include <net/bpf.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <net/ethernet.h>
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#endif
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static void
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ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
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{
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int i;
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/* Verify the required MIMO bits are set */
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if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
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(IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
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return;
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/* XXX This assumes the MIMO radios have both ctl and ext chains */
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for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
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IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
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IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
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}
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/* XXX This also assumes the MIMO radios have both ctl and ext chains */
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for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
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ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
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ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
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}
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ni->ni_mimo_chains = rx->c_chain;
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}
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int
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ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m,
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struct ieee80211_rx_stats *rx)
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{
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/* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
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ieee80211_process_mimo(ni, rx);
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return ieee80211_input(ni, m, rx->rssi, rx->nf);
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}
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int
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ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
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{
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struct ieee80211_rx_stats rx;
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rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
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rx.nf = nf;
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rx.rssi = rssi;
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return ieee80211_input_mimo_all(ic, m, &rx);
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}
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int
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ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m,
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struct ieee80211_rx_stats *rx)
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{
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struct ieee80211vap *vap;
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int type = -1;
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m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
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/* XXX locking */
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TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
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struct ieee80211_node *ni;
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struct mbuf *mcopy;
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/* NB: could check for IFF_UP but this is cheaper */
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if (vap->iv_state == IEEE80211_S_INIT)
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continue;
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/*
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* WDS vap's only receive directed traffic from the
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* station at the ``far end''. That traffic should
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* be passed through the AP vap the station is associated
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* to--so don't spam them with mcast frames.
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*/
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if (vap->iv_opmode == IEEE80211_M_WDS)
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continue;
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if (TAILQ_NEXT(vap, iv_next) != NULL) {
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/*
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* Packet contents are changed by ieee80211_decap
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* so do a deep copy of the packet.
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*/
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mcopy = m_dup(m, M_NOWAIT);
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if (mcopy == NULL) {
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/* XXX stat+msg */
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continue;
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}
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} else {
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mcopy = m;
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m = NULL;
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}
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ni = ieee80211_ref_node(vap->iv_bss);
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type = ieee80211_input_mimo(ni, mcopy, rx);
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ieee80211_free_node(ni);
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}
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if (m != NULL) /* no vaps, reclaim mbuf */
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m_freem(m);
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return type;
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}
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/*
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* This function reassembles fragments.
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*
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* XXX should handle 3 concurrent reassemblies per-spec.
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*/
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struct mbuf *
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ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
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{
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struct ieee80211vap *vap = ni->ni_vap;
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struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
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struct ieee80211_frame *lwh;
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uint16_t rxseq;
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uint8_t fragno;
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uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
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struct mbuf *mfrag;
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KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
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rxseq = le16toh(*(uint16_t *)wh->i_seq);
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fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
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/* Quick way out, if there's nothing to defragment */
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if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
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return m;
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/*
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* Remove frag to insure it doesn't get reaped by timer.
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*/
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if (ni->ni_table == NULL) {
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/*
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* Should never happen. If the node is orphaned (not in
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* the table) then input packets should not reach here.
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* Otherwise, a concurrent request that yanks the table
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* should be blocked by other interlocking and/or by first
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* shutting the driver down. Regardless, be defensive
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* here and just bail
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*/
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/* XXX need msg+stat */
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m_freem(m);
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return NULL;
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}
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IEEE80211_NODE_LOCK(ni->ni_table);
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mfrag = ni->ni_rxfrag[0];
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ni->ni_rxfrag[0] = NULL;
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IEEE80211_NODE_UNLOCK(ni->ni_table);
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/*
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* Validate new fragment is in order and
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* related to the previous ones.
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*/
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if (mfrag != NULL) {
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uint16_t last_rxseq;
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lwh = mtod(mfrag, struct ieee80211_frame *);
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last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
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/* NB: check seq # and frag together */
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if (rxseq != last_rxseq+1 ||
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!IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
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!IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
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/*
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* Unrelated fragment or no space for it,
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* clear current fragments.
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*/
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m_freem(mfrag);
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mfrag = NULL;
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}
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}
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if (mfrag == NULL) {
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if (fragno != 0) { /* !first fragment, discard */
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vap->iv_stats.is_rx_defrag++;
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IEEE80211_NODE_STAT(ni, rx_defrag);
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m_freem(m);
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return NULL;
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}
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mfrag = m;
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} else { /* concatenate */
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m_adj(m, hdrspace); /* strip header */
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m_cat(mfrag, m);
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/* NB: m_cat doesn't update the packet header */
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mfrag->m_pkthdr.len += m->m_pkthdr.len;
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/* track last seqnum and fragno */
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lwh = mtod(mfrag, struct ieee80211_frame *);
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*(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
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}
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if (more_frag) { /* more to come, save */
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ni->ni_rxfragstamp = ticks;
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ni->ni_rxfrag[0] = mfrag;
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mfrag = NULL;
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}
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return mfrag;
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}
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void
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ieee80211_deliver_data(struct ieee80211vap *vap,
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struct ieee80211_node *ni, struct mbuf *m)
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{
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struct ether_header *eh = mtod(m, struct ether_header *);
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struct ifnet *ifp = vap->iv_ifp;
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/* clear driver/net80211 flags before passing up */
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m->m_flags &= ~(M_MCAST | M_BCAST);
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#if __FreeBSD_version >= 1000046
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m_clrprotoflags(m);
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#endif
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/* NB: see hostap_deliver_data, this path doesn't handle hostap */
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KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
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/*
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* Do accounting.
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*/
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ifp->if_ipackets++;
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IEEE80211_NODE_STAT(ni, rx_data);
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IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
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if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
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m->m_flags |= M_MCAST; /* XXX M_BCAST? */
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IEEE80211_NODE_STAT(ni, rx_mcast);
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} else
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IEEE80211_NODE_STAT(ni, rx_ucast);
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m->m_pkthdr.rcvif = ifp;
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if (ni->ni_vlan != 0) {
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/* attach vlan tag */
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m->m_pkthdr.ether_vtag = ni->ni_vlan;
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m->m_flags |= M_VLANTAG;
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}
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ifp->if_input(ifp, m);
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}
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struct mbuf *
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ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
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{
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struct ieee80211_qosframe_addr4 wh;
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struct ether_header *eh;
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struct llc *llc;
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KASSERT(hdrlen <= sizeof(wh),
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("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
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if (m->m_len < hdrlen + sizeof(*llc) &&
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(m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
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vap->iv_stats.is_rx_tooshort++;
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/* XXX msg */
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return NULL;
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}
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memcpy(&wh, mtod(m, caddr_t), hdrlen);
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llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
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if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
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llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
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llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
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/* NB: preserve AppleTalk frames that have a native SNAP hdr */
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!(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
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llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
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m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
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llc = NULL;
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} else {
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m_adj(m, hdrlen - sizeof(*eh));
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}
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eh = mtod(m, struct ether_header *);
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switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
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case IEEE80211_FC1_DIR_NODS:
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IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
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IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
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break;
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case IEEE80211_FC1_DIR_TODS:
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IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
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IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
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break;
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case IEEE80211_FC1_DIR_FROMDS:
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IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
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IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
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break;
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case IEEE80211_FC1_DIR_DSTODS:
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IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
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IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
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break;
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}
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#ifndef __NO_STRICT_ALIGNMENT
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if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
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m = ieee80211_realign(vap, m, sizeof(*eh));
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if (m == NULL)
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return NULL;
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}
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#endif /* !__NO_STRICT_ALIGNMENT */
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if (llc != NULL) {
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eh = mtod(m, struct ether_header *);
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eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
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}
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return m;
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}
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/*
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* Decap a frame encapsulated in a fast-frame/A-MSDU.
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*/
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struct mbuf *
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ieee80211_decap1(struct mbuf *m, int *framelen)
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{
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#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
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struct ether_header *eh;
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struct llc *llc;
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/*
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* The frame has an 802.3 header followed by an 802.2
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* LLC header. The encapsulated frame length is in the
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* first header type field; save that and overwrite it
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* with the true type field found in the second. Then
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* copy the 802.3 header up to where it belongs and
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* adjust the mbuf contents to remove the void.
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*/
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if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
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return NULL;
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eh = mtod(m, struct ether_header *); /* 802.3 header is first */
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llc = (struct llc *)&eh[1]; /* 802.2 header follows */
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*framelen = ntohs(eh->ether_type) /* encap'd frame size */
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+ sizeof(struct ether_header) - sizeof(struct llc);
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eh->ether_type = llc->llc_un.type_snap.ether_type;
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ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
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sizeof(struct ether_header));
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m_adj(m, sizeof(struct llc));
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return m;
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#undef FF_LLC_SIZE
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}
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/*
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* Install received rate set information in the node's state block.
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*/
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int
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ieee80211_setup_rates(struct ieee80211_node *ni,
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const uint8_t *rates, const uint8_t *xrates, int flags)
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{
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struct ieee80211vap *vap = ni->ni_vap;
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struct ieee80211_rateset *rs = &ni->ni_rates;
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memset(rs, 0, sizeof(*rs));
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rs->rs_nrates = rates[1];
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memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
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if (xrates != NULL) {
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uint8_t nxrates;
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/*
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* Tack on 11g extended supported rate element.
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*/
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nxrates = xrates[1];
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if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
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nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
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IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
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"extended rate set too large; only using "
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"%u of %u rates", nxrates, xrates[1]);
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vap->iv_stats.is_rx_rstoobig++;
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}
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memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
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rs->rs_nrates += nxrates;
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}
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return ieee80211_fix_rate(ni, rs, flags);
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}
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/*
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* Send a management frame error response to the specified
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* station. If ni is associated with the station then use
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* it; otherwise allocate a temporary node suitable for
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* transmitting the frame and then free the reference so
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* it will go away as soon as the frame has been transmitted.
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*/
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void
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ieee80211_send_error(struct ieee80211_node *ni,
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const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
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{
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struct ieee80211vap *vap = ni->ni_vap;
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int istmp;
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if (ni == vap->iv_bss) {
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if (vap->iv_state != IEEE80211_S_RUN) {
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/*
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* XXX hack until we get rid of this routine.
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* We can be called prior to the vap reaching
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* run state under certain conditions in which
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* case iv_bss->ni_chan will not be setup.
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* Check for this explicitly and and just ignore
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* the request.
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*/
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return;
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}
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ni = ieee80211_tmp_node(vap, mac);
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if (ni == NULL) {
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/* XXX msg */
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return;
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}
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istmp = 1;
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} else
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istmp = 0;
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IEEE80211_SEND_MGMT(ni, subtype, arg);
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if (istmp)
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ieee80211_free_node(ni);
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}
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int
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ieee80211_alloc_challenge(struct ieee80211_node *ni)
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{
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if (ni->ni_challenge == NULL)
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ni->ni_challenge = (uint32_t *) malloc(IEEE80211_CHALLENGE_LEN,
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M_80211_NODE, M_NOWAIT);
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if (ni->ni_challenge == NULL) {
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IEEE80211_NOTE(ni->ni_vap,
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IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
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"%s", "shared key challenge alloc failed");
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/* XXX statistic */
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}
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return (ni->ni_challenge != NULL);
|
|
}
|
|
|
|
/*
|
|
* Parse a Beacon or ProbeResponse frame and return the
|
|
* useful information in an ieee80211_scanparams structure.
|
|
* Status is set to 0 if no problems were found; otherwise
|
|
* a bitmask of IEEE80211_BPARSE_* items is returned that
|
|
* describes the problems detected.
|
|
*/
|
|
int
|
|
ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
|
|
struct ieee80211_scanparams *scan)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_frame *wh;
|
|
uint8_t *frm, *efrm;
|
|
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
frm = (uint8_t *)&wh[1];
|
|
efrm = mtod(m, uint8_t *) + m->m_len;
|
|
scan->status = 0;
|
|
/*
|
|
* beacon/probe response frame format
|
|
* [8] time stamp
|
|
* [2] beacon interval
|
|
* [2] capability information
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [tlv] country information
|
|
* [tlv] channel switch announcement (CSA)
|
|
* [tlv] parameter set (FH/DS)
|
|
* [tlv] erp information
|
|
* [tlv] extended supported rates
|
|
* [tlv] WME
|
|
* [tlv] WPA or RSN
|
|
* [tlv] HT capabilities
|
|
* [tlv] HT information
|
|
* [tlv] Atheros capabilities
|
|
* [tlv] Mesh ID
|
|
* [tlv] Mesh Configuration
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
|
|
return (scan->status = IEEE80211_BPARSE_BADIELEN));
|
|
memset(scan, 0, sizeof(*scan));
|
|
scan->tstamp = frm; frm += 8;
|
|
scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
|
|
scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
|
|
scan->bchan = ieee80211_chan2ieee(ic, ic->ic_curchan);
|
|
scan->chan = scan->bchan;
|
|
scan->ies = frm;
|
|
scan->ies_len = efrm - frm;
|
|
|
|
while (efrm - frm > 1) {
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
|
|
return (scan->status = IEEE80211_BPARSE_BADIELEN));
|
|
switch (*frm) {
|
|
case IEEE80211_ELEMID_SSID:
|
|
scan->ssid = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_RATES:
|
|
scan->rates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_COUNTRY:
|
|
scan->country = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_CSA:
|
|
scan->csa = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_QUIET:
|
|
scan->quiet = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_FHPARMS:
|
|
if (ic->ic_phytype == IEEE80211_T_FH) {
|
|
scan->fhdwell = LE_READ_2(&frm[2]);
|
|
scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
|
|
scan->fhindex = frm[6];
|
|
}
|
|
break;
|
|
case IEEE80211_ELEMID_DSPARMS:
|
|
/*
|
|
* XXX hack this since depending on phytype
|
|
* is problematic for multi-mode devices.
|
|
*/
|
|
if (ic->ic_phytype != IEEE80211_T_FH)
|
|
scan->chan = frm[2];
|
|
break;
|
|
case IEEE80211_ELEMID_TIM:
|
|
/* XXX ATIM? */
|
|
scan->tim = frm;
|
|
scan->timoff = frm - mtod(m, uint8_t *);
|
|
break;
|
|
case IEEE80211_ELEMID_IBSSPARMS:
|
|
case IEEE80211_ELEMID_CFPARMS:
|
|
case IEEE80211_ELEMID_PWRCNSTR:
|
|
/* NB: avoid debugging complaints */
|
|
break;
|
|
case IEEE80211_ELEMID_XRATES:
|
|
scan->xrates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_ERP:
|
|
if (frm[1] != 1) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID, wh, "ERP",
|
|
"bad len %u", frm[1]);
|
|
vap->iv_stats.is_rx_elem_toobig++;
|
|
break;
|
|
}
|
|
scan->erp = frm[2] | 0x100;
|
|
break;
|
|
case IEEE80211_ELEMID_HTCAP:
|
|
scan->htcap = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_RSN:
|
|
scan->rsn = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_HTINFO:
|
|
scan->htinfo = frm;
|
|
break;
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
case IEEE80211_ELEMID_MESHID:
|
|
scan->meshid = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_MESHCONF:
|
|
scan->meshconf = frm;
|
|
break;
|
|
#endif
|
|
case IEEE80211_ELEMID_VENDOR:
|
|
if (iswpaoui(frm))
|
|
scan->wpa = frm;
|
|
else if (iswmeparam(frm) || iswmeinfo(frm))
|
|
scan->wme = frm;
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
else if (isatherosoui(frm))
|
|
scan->ath = frm;
|
|
#endif
|
|
#ifdef IEEE80211_SUPPORT_TDMA
|
|
else if (istdmaoui(frm))
|
|
scan->tdma = frm;
|
|
#endif
|
|
else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
|
|
/*
|
|
* Accept pre-draft HT ie's if the
|
|
* standard ones have not been seen.
|
|
*/
|
|
if (ishtcapoui(frm)) {
|
|
if (scan->htcap == NULL)
|
|
scan->htcap = frm;
|
|
} else if (ishtinfooui(frm)) {
|
|
if (scan->htinfo == NULL)
|
|
scan->htcap = frm;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
|
|
wh, "unhandled",
|
|
"id %u, len %u", *frm, frm[1]);
|
|
vap->iv_stats.is_rx_elem_unknown++;
|
|
break;
|
|
}
|
|
frm += frm[1] + 2;
|
|
}
|
|
IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
|
|
scan->status |= IEEE80211_BPARSE_RATES_INVALID);
|
|
if (scan->rates != NULL && scan->xrates != NULL) {
|
|
/*
|
|
* NB: don't process XRATES if RATES is missing. This
|
|
* avoids a potential null ptr deref and should be ok
|
|
* as the return code will already note RATES is missing
|
|
* (so callers shouldn't otherwise process the frame).
|
|
*/
|
|
IEEE80211_VERIFY_ELEMENT(scan->xrates,
|
|
IEEE80211_RATE_MAXSIZE - scan->rates[1],
|
|
scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
|
|
}
|
|
IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
|
|
scan->status |= IEEE80211_BPARSE_SSID_INVALID);
|
|
if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
|
|
/*
|
|
* Frame was received on a channel different from the
|
|
* one indicated in the DS params element id;
|
|
* silently discard it.
|
|
*
|
|
* NB: this can happen due to signal leakage.
|
|
* But we should take it for FH phy because
|
|
* the rssi value should be correct even for
|
|
* different hop pattern in FH.
|
|
*/
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
|
|
wh, NULL, "for off-channel %u", scan->chan);
|
|
vap->iv_stats.is_rx_chanmismatch++;
|
|
scan->status |= IEEE80211_BPARSE_OFFCHAN;
|
|
}
|
|
if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
|
|
scan->bintval <= IEEE80211_BINTVAL_MAX)) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
|
|
wh, NULL, "bogus beacon interval (%d TU)",
|
|
(int) scan->bintval);
|
|
vap->iv_stats.is_rx_badbintval++;
|
|
scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
|
|
}
|
|
if (scan->country != NULL) {
|
|
/*
|
|
* Validate we have at least enough data to extract
|
|
* the country code. Not sure if we should return an
|
|
* error instead of discarding the IE; consider this
|
|
* being lenient as we don't depend on the data for
|
|
* correct operation.
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
|
|
scan->country = NULL);
|
|
}
|
|
if (scan->csa != NULL) {
|
|
/*
|
|
* Validate Channel Switch Announcement; this must
|
|
* be the correct length or we toss the frame.
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
|
|
scan->status |= IEEE80211_BPARSE_CSA_INVALID);
|
|
}
|
|
/*
|
|
* Process HT ie's. This is complicated by our
|
|
* accepting both the standard ie's and the pre-draft
|
|
* vendor OUI ie's that some vendors still use/require.
|
|
*/
|
|
if (scan->htcap != NULL) {
|
|
IEEE80211_VERIFY_LENGTH(scan->htcap[1],
|
|
scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
|
|
4 + sizeof(struct ieee80211_ie_htcap)-2 :
|
|
sizeof(struct ieee80211_ie_htcap)-2,
|
|
scan->htcap = NULL);
|
|
}
|
|
if (scan->htinfo != NULL) {
|
|
IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
|
|
scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
|
|
4 + sizeof(struct ieee80211_ie_htinfo)-2 :
|
|
sizeof(struct ieee80211_ie_htinfo)-2,
|
|
scan->htinfo = NULL);
|
|
}
|
|
return scan->status;
|
|
}
|
|
|
|
/*
|
|
* Parse an Action frame. Return 0 on success, non-zero on failure.
|
|
*/
|
|
int
|
|
ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
const struct ieee80211_action *ia;
|
|
struct ieee80211_frame *wh;
|
|
uint8_t *frm, *efrm;
|
|
|
|
/*
|
|
* action frame format:
|
|
* [1] category
|
|
* [1] action
|
|
* [tlv] parameters
|
|
*/
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
frm = (u_int8_t *)&wh[1];
|
|
efrm = mtod(m, u_int8_t *) + m->m_len;
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action), return EINVAL);
|
|
ia = (const struct ieee80211_action *) frm;
|
|
|
|
vap->iv_stats.is_rx_action++;
|
|
IEEE80211_NODE_STAT(ni, rx_action);
|
|
|
|
/* verify frame payloads but defer processing */
|
|
switch (ia->ia_category) {
|
|
case IEEE80211_ACTION_CAT_BA:
|
|
switch (ia->ia_action) {
|
|
case IEEE80211_ACTION_BA_ADDBA_REQUEST:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ba_addbarequest),
|
|
return EINVAL);
|
|
break;
|
|
case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ba_addbaresponse),
|
|
return EINVAL);
|
|
break;
|
|
case IEEE80211_ACTION_BA_DELBA:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ba_delba),
|
|
return EINVAL);
|
|
break;
|
|
}
|
|
break;
|
|
case IEEE80211_ACTION_CAT_HT:
|
|
switch (ia->ia_action) {
|
|
case IEEE80211_ACTION_HT_TXCHWIDTH:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ht_txchwidth),
|
|
return EINVAL);
|
|
break;
|
|
case IEEE80211_ACTION_HT_MIMOPWRSAVE:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ht_mimopowersave),
|
|
return EINVAL);
|
|
break;
|
|
}
|
|
break;
|
|
#ifdef IEEE80211_SUPPORT_MESH
|
|
case IEEE80211_ACTION_CAT_MESH:
|
|
switch (ia->ia_action) {
|
|
case IEEE80211_ACTION_MESH_LMETRIC:
|
|
/*
|
|
* XXX: verification is true only if we are using
|
|
* Airtime link metric (default)
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_meshlmetric_ie),
|
|
return EINVAL);
|
|
break;
|
|
case IEEE80211_ACTION_MESH_HWMP:
|
|
/* verify something */
|
|
break;
|
|
case IEEE80211_ACTION_MESH_GANN:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_meshgann_ie),
|
|
return EINVAL);
|
|
break;
|
|
case IEEE80211_ACTION_MESH_CC:
|
|
case IEEE80211_ACTION_MESH_MCCA_SREQ:
|
|
case IEEE80211_ACTION_MESH_MCCA_SREP:
|
|
case IEEE80211_ACTION_MESH_MCCA_AREQ:
|
|
case IEEE80211_ACTION_MESH_MCCA_ADVER:
|
|
case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
|
|
case IEEE80211_ACTION_MESH_TBTT_REQ:
|
|
case IEEE80211_ACTION_MESH_TBTT_RES:
|
|
/* reject these early on, not implemented */
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
|
|
wh, NULL, "not implemented yet, act=0x%02X",
|
|
ia->ia_action);
|
|
return EINVAL;
|
|
}
|
|
break;
|
|
case IEEE80211_ACTION_CAT_SELF_PROT:
|
|
/* If TA or RA group address discard silently */
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
|
|
IEEE80211_IS_MULTICAST(wh->i_addr2))
|
|
return EINVAL;
|
|
/*
|
|
* XXX: Should we verify complete length now or it is
|
|
* to varying in sizes?
|
|
*/
|
|
switch (ia->ia_action) {
|
|
case IEEE80211_ACTION_MESHPEERING_CONFIRM:
|
|
case IEEE80211_ACTION_MESHPEERING_CLOSE:
|
|
/* is not a peering candidate (yet) */
|
|
if (ni == vap->iv_bss)
|
|
return EINVAL;
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef IEEE80211_DEBUG
|
|
/*
|
|
* Debugging support.
|
|
*/
|
|
void
|
|
ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
|
|
uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
|
|
{
|
|
printf("[%s] discard %s frame, ssid mismatch: ",
|
|
ether_sprintf(mac), tag);
|
|
ieee80211_print_essid(ssid + 2, ssid[1]);
|
|
printf("\n");
|
|
}
|
|
|
|
/*
|
|
* Return the bssid of a frame.
|
|
*/
|
|
static const uint8_t *
|
|
ieee80211_getbssid(const struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh)
|
|
{
|
|
if (vap->iv_opmode == IEEE80211_M_STA)
|
|
return wh->i_addr2;
|
|
if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
|
|
return wh->i_addr1;
|
|
if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
|
|
return wh->i_addr1;
|
|
return wh->i_addr3;
|
|
}
|
|
|
|
#include <machine/stdarg.h>
|
|
|
|
void
|
|
ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
|
|
{
|
|
char buf[128]; /* XXX */
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
|
|
if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
|
|
}
|
|
|
|
void
|
|
ieee80211_note_frame(const struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh,
|
|
const char *fmt, ...)
|
|
{
|
|
char buf[128]; /* XXX */
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
if_printf(vap->iv_ifp, "[%s] %s\n",
|
|
ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
|
|
}
|
|
|
|
void
|
|
ieee80211_note_mac(const struct ieee80211vap *vap,
|
|
const uint8_t mac[IEEE80211_ADDR_LEN],
|
|
const char *fmt, ...)
|
|
{
|
|
char buf[128]; /* XXX */
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(buf, sizeof(buf), fmt, ap);
|
|
va_end(ap);
|
|
if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
|
|
}
|
|
|
|
void
|
|
ieee80211_discard_frame(const struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh,
|
|
const char *type, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if_printf(vap->iv_ifp, "[%s] discard ",
|
|
ether_sprintf(ieee80211_getbssid(vap, wh)));
|
|
if (type == NULL) {
|
|
printf("%s frame, ", ieee80211_mgt_subtype_name[
|
|
(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
|
|
IEEE80211_FC0_SUBTYPE_SHIFT]);
|
|
} else
|
|
printf("%s frame, ", type);
|
|
va_start(ap, fmt);
|
|
vprintf(fmt, ap);
|
|
va_end(ap);
|
|
printf("\n");
|
|
}
|
|
|
|
void
|
|
ieee80211_discard_ie(const struct ieee80211vap *vap,
|
|
const struct ieee80211_frame *wh,
|
|
const char *type, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if_printf(vap->iv_ifp, "[%s] discard ",
|
|
ether_sprintf(ieee80211_getbssid(vap, wh)));
|
|
if (type != NULL)
|
|
printf("%s information element, ", type);
|
|
else
|
|
printf("information element, ");
|
|
va_start(ap, fmt);
|
|
vprintf(fmt, ap);
|
|
va_end(ap);
|
|
printf("\n");
|
|
}
|
|
|
|
void
|
|
ieee80211_discard_mac(const struct ieee80211vap *vap,
|
|
const uint8_t mac[IEEE80211_ADDR_LEN],
|
|
const char *type, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
|
|
if (type != NULL)
|
|
printf("%s frame, ", type);
|
|
else
|
|
printf("frame, ");
|
|
va_start(ap, fmt);
|
|
vprintf(fmt, ap);
|
|
va_end(ap);
|
|
printf("\n");
|
|
}
|
|
#endif /* IEEE80211_DEBUG */
|