5b16c28c42
long-term work before they can be serviced. Packets are tagged and assigned an age (in seconds) at the point they are added to the queue. If a packet is not retrieved before it's age expires it is reclaimed. Tagging can take two forms: a reference to an ieee80211_node (as happens in the tx path) or an opaque token in cases where there is no reference or the node structure is not stable (i.e. it's going to be destroyed). o add ic_stageq to replace the per-node wds staging queue used for dynamic wds o add ieee80211_mac_hash for building ageq tokens; this computes a 32-bit hash from an 802.11 mac address (copied from the bridge) o while here fix a stray ';' noticed in IEEE80211_PSQ_INIT Reviewed by: rpaulo Approved by: re (kensmith)
789 lines
23 KiB
C
789 lines
23 KiB
C
/*-
|
|
* Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
|
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* All rights reserved.
|
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*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
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|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* 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
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* 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>
|
|
#ifdef __FreeBSD__
|
|
__FBSDID("$FreeBSD$");
|
|
#endif
|
|
|
|
/*
|
|
* IEEE 802.11 WDS mode support.
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|
*/
|
|
#include "opt_inet.h"
|
|
#include "opt_wlan.h"
|
|
|
|
#include <sys/param.h>
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|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_media.h>
|
|
#include <net/if_llc.h>
|
|
#include <net/ethernet.h>
|
|
|
|
#include <net/bpf.h>
|
|
|
|
#include <net80211/ieee80211_var.h>
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|
#include <net80211/ieee80211_wds.h>
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|
#include <net80211/ieee80211_input.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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|
|
|
static void wds_vattach(struct ieee80211vap *);
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static int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int);
|
|
static int wds_input(struct ieee80211_node *ni, struct mbuf *m, int, int);
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|
static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *,
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|
int subtype, int, int);
|
|
|
|
void
|
|
ieee80211_wds_attach(struct ieee80211com *ic)
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{
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ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach;
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|
}
|
|
|
|
void
|
|
ieee80211_wds_detach(struct ieee80211com *ic)
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|
{
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|
}
|
|
|
|
static void
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|
wds_vdetach(struct ieee80211vap *vap)
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|
{
|
|
if (vap->iv_bss != NULL) {
|
|
/* XXX locking? */
|
|
if (vap->iv_bss->ni_wdsvap == vap)
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vap->iv_bss->ni_wdsvap = NULL;
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|
}
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|
}
|
|
|
|
static void
|
|
wds_vattach(struct ieee80211vap *vap)
|
|
{
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|
vap->iv_newstate = wds_newstate;
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vap->iv_input = wds_input;
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|
vap->iv_recv_mgmt = wds_recv_mgmt;
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|
vap->iv_opdetach = wds_vdetach;
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|
}
|
|
|
|
static void
|
|
wds_flush(struct ieee80211_node *ni)
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|
{
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|
struct ieee80211com *ic = ni->ni_ic;
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struct mbuf *m, *next;
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|
int8_t rssi, nf;
|
|
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|
m = ieee80211_ageq_remove(&ic->ic_stageq,
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(void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
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if (m == NULL)
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return;
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|
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|
IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni,
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"%s", "flush wds queue");
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ic->ic_node_getsignal(ni, &rssi, &nf);
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for (; m != NULL; m = next) {
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|
next = m->m_nextpkt;
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|
m->m_nextpkt = NULL;
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ieee80211_input(ni, m, rssi, nf);
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}
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|
}
|
|
|
|
static int
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|
ieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan)
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|
{
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|
struct ieee80211com *ic = vap->iv_ic;
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struct ieee80211_node_table *nt = &ic->ic_sta;
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|
struct ieee80211_node *ni, *obss;
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
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"%s: creating link to %s on channel %u\n", __func__,
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ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan));
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|
|
|
/* NB: vap create must specify the bssid for the link */
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KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid"));
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|
/* NB: we should only be called on RUN transition */
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|
KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state"));
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|
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|
if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
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|
/*
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|
* Dynamic/non-legacy WDS. Reference the associated
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* station specified by the desired bssid setup at vap
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|
* create. Point ni_wdsvap at the WDS vap so 4-address
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* frames received through the associated AP vap will
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|
* be dispatched upward (e.g. to a bridge) as though
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* they arrived on the WDS vap.
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*/
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IEEE80211_NODE_LOCK(nt);
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obss = NULL;
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ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid);
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if (ni == NULL) {
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/*
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* Node went away before we could hookup. This
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|
* should be ok; no traffic will flow and a leave
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* event will be dispatched that should cause
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* the vap to be destroyed.
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|
*/
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
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"%s: station %s went away\n",
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|
__func__, ether_sprintf(vap->iv_des_bssid));
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|
/* XXX stat? */
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|
} else if (ni->ni_wdsvap != NULL) {
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|
/*
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|
* Node already setup with a WDS vap; we cannot
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* allow multiple references so disallow. If
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|
* ni_wdsvap points at us that's ok; we should
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* do nothing anyway.
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*/
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|
/* XXX printf instead? */
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|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
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"%s: station %s in use with %s\n",
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__func__, ether_sprintf(vap->iv_des_bssid),
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|
ni->ni_wdsvap->iv_ifp->if_xname);
|
|
/* XXX stat? */
|
|
} else {
|
|
/*
|
|
* Committed to new node, setup state.
|
|
*/
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|
obss = vap->iv_bss;
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|
vap->iv_bss = ni;
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|
ni->ni_wdsvap = vap;
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|
}
|
|
IEEE80211_NODE_UNLOCK(nt);
|
|
if (obss != NULL) {
|
|
/* NB: deferred to avoid recursive lock */
|
|
ieee80211_free_node(obss);
|
|
}
|
|
} else {
|
|
/*
|
|
* Legacy WDS vap setup.
|
|
*/
|
|
/*
|
|
* The far end does not associate so we just create
|
|
* create a new node and install it as the vap's
|
|
* bss node. We must simulate an association and
|
|
* authorize the port for traffic to flow.
|
|
* XXX check if node already in sta table?
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|
*/
|
|
ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan);
|
|
if (ni != NULL) {
|
|
obss = vap->iv_bss;
|
|
vap->iv_bss = ieee80211_ref_node(ni);
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|
ni->ni_flags |= IEEE80211_NODE_AREF;
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|
if (obss != NULL)
|
|
ieee80211_free_node(obss);
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|
/* give driver a chance to setup state like ni_txrate */
|
|
if (ic->ic_newassoc != NULL)
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|
ic->ic_newassoc(ni, 1);
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|
/* tell the authenticator about new station */
|
|
if (vap->iv_auth->ia_node_join != NULL)
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|
vap->iv_auth->ia_node_join(ni);
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if (ni->ni_authmode != IEEE80211_AUTH_8021X)
|
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ieee80211_node_authorize(ni);
|
|
|
|
ieee80211_notify_node_join(ni, 1 /*newassoc*/);
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|
/* XXX inject l2uf frame */
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|
}
|
|
}
|
|
|
|
/*
|
|
* Flush any pending frames now that were setup.
|
|
*/
|
|
if (ni != NULL)
|
|
wds_flush(ni);
|
|
return (ni == NULL ? ENOENT : 0);
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|
}
|
|
|
|
/*
|
|
* Propagate multicast frames of an ap vap to all DWDS links.
|
|
* The caller is assumed to have verified this frame is multicast.
|
|
*/
|
|
void
|
|
ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
|
|
{
|
|
struct ieee80211com *ic = vap0->iv_ic;
|
|
struct ifnet *parent = ic->ic_ifp;
|
|
const struct ether_header *eh = mtod(m, const struct ether_header *);
|
|
struct ieee80211_node *ni;
|
|
struct ieee80211vap *vap;
|
|
struct ifnet *ifp;
|
|
struct mbuf *mcopy;
|
|
int err;
|
|
|
|
KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost),
|
|
("%s not mcast", ether_sprintf(eh->ether_dhost)));
|
|
|
|
/* XXX locking */
|
|
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
|
|
/* only DWDS vaps are interesting */
|
|
if (vap->iv_opmode != IEEE80211_M_WDS ||
|
|
(vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))
|
|
continue;
|
|
/* if it came in this interface, don't send it back out */
|
|
ifp = vap->iv_ifp;
|
|
if (ifp == m->m_pkthdr.rcvif)
|
|
continue;
|
|
/*
|
|
* Duplicate the frame and send it.
|
|
*/
|
|
mcopy = m_copypacket(m, M_DONTWAIT);
|
|
if (mcopy == NULL) {
|
|
ifp->if_oerrors++;
|
|
/* XXX stat + msg */
|
|
continue;
|
|
}
|
|
ni = ieee80211_find_txnode(vap, eh->ether_dhost);
|
|
if (ni == NULL) {
|
|
/* NB: ieee80211_find_txnode does stat+msg */
|
|
ifp->if_oerrors++;
|
|
m_freem(mcopy);
|
|
continue;
|
|
}
|
|
/* calculate priority so drivers can find the tx queue */
|
|
if (ieee80211_classify(ni, mcopy)) {
|
|
IEEE80211_DISCARD_MAC(vap,
|
|
IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS,
|
|
eh->ether_dhost, NULL,
|
|
"%s", "classification failure");
|
|
vap->iv_stats.is_tx_classify++;
|
|
ifp->if_oerrors++;
|
|
m_freem(mcopy);
|
|
ieee80211_free_node(ni);
|
|
continue;
|
|
}
|
|
|
|
BPF_MTAP(ifp, m); /* 802.3 tx */
|
|
|
|
/*
|
|
* Encapsulate the packet in prep for transmission.
|
|
*/
|
|
mcopy = ieee80211_encap(vap, ni, mcopy);
|
|
if (mcopy == NULL) {
|
|
/* NB: stat+msg handled in ieee80211_encap */
|
|
ieee80211_free_node(ni);
|
|
continue;
|
|
}
|
|
mcopy->m_flags |= M_MCAST;
|
|
mcopy->m_pkthdr.rcvif = (void *) ni;
|
|
|
|
err = parent->if_transmit(parent, mcopy);
|
|
if (err) {
|
|
/* NB: IFQ_HANDOFF reclaims mbuf */
|
|
ifp->if_oerrors++;
|
|
ieee80211_free_node(ni);
|
|
} else
|
|
ifp->if_opackets++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle DWDS discovery on receipt of a 4-address frame in
|
|
* ap mode. Queue the frame and post an event for someone
|
|
* to plumb the necessary WDS vap for this station. Frames
|
|
* received prior to the vap set running will then be reprocessed
|
|
* as if they were just received.
|
|
*/
|
|
void
|
|
ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m)
|
|
{
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
/*
|
|
* Save the frame with an aging interval 4 times
|
|
* the listen interval specified by the station.
|
|
* Frames that sit around too long are reclaimed
|
|
* using this information.
|
|
* XXX handle overflow?
|
|
* XXX per/vap beacon interval?
|
|
*/
|
|
m->m_pkthdr.rcvif = (void *)(uintptr_t)
|
|
ieee80211_mac_hash(ic, ni->ni_macaddr);
|
|
(void) ieee80211_ageq_append(&ic->ic_stageq, m,
|
|
((ni->ni_intval * ic->ic_lintval) << 2) / 1024);
|
|
ieee80211_notify_wds_discover(ni);
|
|
}
|
|
|
|
/*
|
|
* IEEE80211_M_WDS vap state machine handler.
|
|
*/
|
|
static int
|
|
wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct ieee80211_node *ni;
|
|
enum ieee80211_state ostate;
|
|
int error;
|
|
|
|
IEEE80211_LOCK_ASSERT(ic);
|
|
|
|
ostate = vap->iv_state;
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
|
|
ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
|
|
vap->iv_state = nstate; /* state transition */
|
|
callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
|
|
if (ostate != IEEE80211_S_SCAN)
|
|
ieee80211_cancel_scan(vap); /* background scan */
|
|
ni = vap->iv_bss; /* NB: no reference held */
|
|
error = 0;
|
|
switch (nstate) {
|
|
case IEEE80211_S_INIT:
|
|
switch (ostate) {
|
|
case IEEE80211_S_SCAN:
|
|
ieee80211_cancel_scan(vap);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (ostate != IEEE80211_S_INIT) {
|
|
/* NB: optimize INIT -> INIT case */
|
|
ieee80211_reset_bss(vap);
|
|
}
|
|
break;
|
|
case IEEE80211_S_SCAN:
|
|
switch (ostate) {
|
|
case IEEE80211_S_INIT:
|
|
ieee80211_check_scan_current(vap);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case IEEE80211_S_RUN:
|
|
if (ostate == IEEE80211_S_INIT) {
|
|
/*
|
|
* Already have a channel; bypass the scan
|
|
* and startup immediately.
|
|
*/
|
|
error = ieee80211_create_wds(vap, ic->ic_curchan);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Process a received frame. The node associated with the sender
|
|
* should be supplied. If nothing was found in the node table then
|
|
* the caller is assumed to supply a reference to iv_bss instead.
|
|
* The RSSI and a timestamp are also supplied. The RSSI data is used
|
|
* during AP scanning to select a AP to associate with; it can have
|
|
* any units so long as values have consistent units and higher values
|
|
* mean ``better signal''. The receive timestamp is currently not used
|
|
* by the 802.11 layer.
|
|
*/
|
|
static int
|
|
wds_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
|
|
{
|
|
#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
|
|
#define HAS_SEQ(type) ((type & 0x4) == 0)
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
struct ieee80211_frame *wh;
|
|
struct ieee80211_key *key;
|
|
struct ether_header *eh;
|
|
int hdrspace, need_tap;
|
|
uint8_t dir, type, subtype, qos;
|
|
uint16_t rxseq;
|
|
|
|
if (m->m_flags & M_AMPDU_MPDU) {
|
|
/*
|
|
* Fastpath for A-MPDU reorder q resubmission. Frames
|
|
* w/ M_AMPDU_MPDU marked have already passed through
|
|
* here but were received out of order and been held on
|
|
* the reorder queue. When resubmitted they are marked
|
|
* with the M_AMPDU_MPDU flag and we can bypass most of
|
|
* the normal processing.
|
|
*/
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
type = IEEE80211_FC0_TYPE_DATA;
|
|
dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
|
|
subtype = IEEE80211_FC0_SUBTYPE_QOS;
|
|
hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
|
|
goto resubmit_ampdu;
|
|
}
|
|
|
|
KASSERT(ni != NULL, ("null node"));
|
|
|
|
need_tap = 1; /* mbuf need to be tapped. */
|
|
type = -1; /* undefined */
|
|
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, NULL,
|
|
"too short (1): len %u", m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Bit of a cheat here, we use a pointer for a 3-address
|
|
* frame format but don't reference fields past outside
|
|
* ieee80211_frame_min w/o first validating the data is
|
|
* present.
|
|
*/
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
|
|
IEEE80211_FC0_VERSION_0) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
|
|
wh->i_fc[0], wh->i_fc[1]);
|
|
vap->iv_stats.is_rx_badversion++;
|
|
goto err;
|
|
}
|
|
|
|
dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
|
|
type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
|
|
subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
|
|
|
|
/* NB: WDS vap's do not scan */
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) {
|
|
IEEE80211_DISCARD_MAC(vap,
|
|
IEEE80211_MSG_ANY, ni->ni_macaddr, NULL,
|
|
"too short (3): len %u", m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
/* NB: the TA is implicitly verified by finding the wds peer node */
|
|
if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) &&
|
|
!IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) {
|
|
/* not interested in */
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
wh->i_addr1, NULL, "%s", "not to bss");
|
|
vap->iv_stats.is_rx_wrongbss++;
|
|
goto out;
|
|
}
|
|
IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
|
|
ni->ni_noise = nf;
|
|
if (HAS_SEQ(type)) {
|
|
uint8_t tid = ieee80211_gettid(wh);
|
|
if (IEEE80211_QOS_HAS_SEQ(wh) &&
|
|
TID_TO_WME_AC(tid) >= WME_AC_VI)
|
|
ic->ic_wme.wme_hipri_traffic++;
|
|
rxseq = le16toh(*(uint16_t *)wh->i_seq);
|
|
if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
|
|
(wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
|
|
SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
|
|
/* duplicate, discard */
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
wh->i_addr1, "duplicate",
|
|
"seqno <%u,%u> fragno <%u,%u> tid %u",
|
|
rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
|
|
ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT,
|
|
rxseq & IEEE80211_SEQ_FRAG_MASK,
|
|
ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK,
|
|
tid);
|
|
vap->iv_stats.is_rx_dup++;
|
|
IEEE80211_NODE_STAT(ni, rx_dup);
|
|
goto out;
|
|
}
|
|
ni->ni_rxseqs[tid] = rxseq;
|
|
}
|
|
switch (type) {
|
|
case IEEE80211_FC0_TYPE_DATA:
|
|
hdrspace = ieee80211_hdrspace(ic, wh);
|
|
if (m->m_len < hdrspace &&
|
|
(m = m_pullup(m, hdrspace)) == NULL) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, NULL,
|
|
"data too short: expecting %u", hdrspace);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out; /* XXX */
|
|
}
|
|
if (dir != IEEE80211_FC1_DIR_DSTODS) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "incorrect dir 0x%x", dir);
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Only legacy WDS traffic should take this path.
|
|
*/
|
|
if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "%s", "not legacy wds");
|
|
vap->iv_stats.is_rx_wrongdir++;/*XXX*/
|
|
goto out;
|
|
}
|
|
if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
|
|
ni->ni_inact = ni->ni_inact_reload;
|
|
/*
|
|
* Handle A-MPDU re-ordering. If the frame is to be
|
|
* processed directly then ieee80211_ampdu_reorder
|
|
* will return 0; otherwise it has consumed the mbuf
|
|
* and we should do nothing more with it.
|
|
*/
|
|
if ((m->m_flags & M_AMPDU) &&
|
|
ieee80211_ampdu_reorder(ni, m) != 0) {
|
|
m = NULL;
|
|
goto out;
|
|
}
|
|
resubmit_ampdu:
|
|
|
|
/*
|
|
* Handle privacy requirements. Note that we
|
|
* must not be preempted from here until after
|
|
* we (potentially) call ieee80211_crypto_demic;
|
|
* otherwise we may violate assumptions in the
|
|
* crypto cipher modules used to do delayed update
|
|
* of replay sequence numbers.
|
|
*/
|
|
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
|
|
if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
|
|
/*
|
|
* Discard encrypted frames when privacy is off.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "WEP", "%s", "PRIVACY off");
|
|
vap->iv_stats.is_rx_noprivacy++;
|
|
IEEE80211_NODE_STAT(ni, rx_noprivacy);
|
|
goto out;
|
|
}
|
|
key = ieee80211_crypto_decap(ni, m, hdrspace);
|
|
if (key == NULL) {
|
|
/* NB: stats+msgs handled in crypto_decap */
|
|
IEEE80211_NODE_STAT(ni, rx_wepfail);
|
|
goto out;
|
|
}
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
|
|
} else {
|
|
/* XXX M_WEP and IEEE80211_F_PRIVACY */
|
|
key = NULL;
|
|
}
|
|
|
|
/*
|
|
* Save QoS bits for use below--before we strip the header.
|
|
*/
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
|
|
qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
|
|
((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
|
|
((struct ieee80211_qosframe *)wh)->i_qos[0];
|
|
} else
|
|
qos = 0;
|
|
|
|
/*
|
|
* Next up, any fragmentation.
|
|
*/
|
|
if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
m = ieee80211_defrag(ni, m, hdrspace);
|
|
if (m == NULL) {
|
|
/* Fragment dropped or frame not complete yet */
|
|
goto out;
|
|
}
|
|
}
|
|
wh = NULL; /* no longer valid, catch any uses */
|
|
|
|
/*
|
|
* Next strip any MSDU crypto bits.
|
|
*/
|
|
if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
ni->ni_macaddr, "data", "%s", "demic error");
|
|
vap->iv_stats.is_rx_demicfail++;
|
|
IEEE80211_NODE_STAT(ni, rx_demicfail);
|
|
goto out;
|
|
}
|
|
|
|
/* copy to listener after decrypt */
|
|
if (ieee80211_radiotap_active_vap(vap))
|
|
ieee80211_radiotap_rx(vap, m);
|
|
need_tap = 0;
|
|
|
|
/*
|
|
* Finally, strip the 802.11 header.
|
|
*/
|
|
m = ieee80211_decap(vap, m, hdrspace);
|
|
if (m == NULL) {
|
|
/* XXX mask bit to check for both */
|
|
/* don't count Null data frames as errors */
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
|
|
subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
|
|
goto out;
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
ni->ni_macaddr, "data", "%s", "decap error");
|
|
vap->iv_stats.is_rx_decap++;
|
|
IEEE80211_NODE_STAT(ni, rx_decap);
|
|
goto err;
|
|
}
|
|
eh = mtod(m, struct ether_header *);
|
|
if (!ieee80211_node_is_authorized(ni)) {
|
|
/*
|
|
* Deny any non-PAE frames received prior to
|
|
* authorization. For open/shared-key
|
|
* authentication the port is mark authorized
|
|
* after authentication completes. For 802.1x
|
|
* the port is not marked authorized by the
|
|
* authenticator until the handshake has completed.
|
|
*/
|
|
if (eh->ether_type != htons(ETHERTYPE_PAE)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
eh->ether_shost, "data",
|
|
"unauthorized port: ether type 0x%x len %u",
|
|
eh->ether_type, m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_unauth++;
|
|
IEEE80211_NODE_STAT(ni, rx_unauth);
|
|
goto err;
|
|
}
|
|
} else {
|
|
/*
|
|
* When denying unencrypted frames, discard
|
|
* any non-PAE frames received without encryption.
|
|
*/
|
|
if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
|
|
(key == NULL && (m->m_flags & M_WEP) == 0) &&
|
|
eh->ether_type != htons(ETHERTYPE_PAE)) {
|
|
/*
|
|
* Drop unencrypted frames.
|
|
*/
|
|
vap->iv_stats.is_rx_unencrypted++;
|
|
IEEE80211_NODE_STAT(ni, rx_unencrypted);
|
|
goto out;
|
|
}
|
|
}
|
|
/* XXX require HT? */
|
|
if (qos & IEEE80211_QOS_AMSDU) {
|
|
m = ieee80211_decap_amsdu(ni, m);
|
|
if (m == NULL)
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
} else {
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
m = ieee80211_decap_fastframe(vap, ni, m);
|
|
if (m == NULL)
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
#endif
|
|
}
|
|
ieee80211_deliver_data(vap, ni, m);
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
|
|
case IEEE80211_FC0_TYPE_MGT:
|
|
vap->iv_stats.is_rx_mgmt++;
|
|
IEEE80211_NODE_STAT(ni, rx_mgmt);
|
|
if (dir != IEEE80211_FC1_DIR_NODS) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "incorrect dir 0x%x", dir);
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto err;
|
|
}
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, "mgt", "too short: len %u",
|
|
m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
#ifdef IEEE80211_DEBUG
|
|
if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) {
|
|
if_printf(ifp, "received %s from %s rssi %d\n",
|
|
ieee80211_mgt_subtype_name[subtype >>
|
|
IEEE80211_FC0_SUBTYPE_SHIFT],
|
|
ether_sprintf(wh->i_addr2), rssi);
|
|
}
|
|
#endif
|
|
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "WEP set but not permitted");
|
|
vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
|
|
goto out;
|
|
}
|
|
vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
|
|
goto out;
|
|
|
|
case IEEE80211_FC0_TYPE_CTL:
|
|
vap->iv_stats.is_rx_ctl++;
|
|
IEEE80211_NODE_STAT(ni, rx_ctrl);
|
|
goto out;
|
|
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, "bad", "frame type 0x%x", type);
|
|
/* should not come here */
|
|
break;
|
|
}
|
|
err:
|
|
ifp->if_ierrors++;
|
|
out:
|
|
if (m != NULL) {
|
|
if (need_tap && ieee80211_radiotap_active_vap(vap))
|
|
ieee80211_radiotap_rx(vap, m);
|
|
m_freem(m);
|
|
}
|
|
return type;
|
|
#undef SEQ_LEQ
|
|
}
|
|
|
|
static void
|
|
wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
|
|
int subtype, int rssi, int nf)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_frame *wh;
|
|
u_int8_t *frm, *efrm;
|
|
|
|
wh = mtod(m0, struct ieee80211_frame *);
|
|
frm = (u_int8_t *)&wh[1];
|
|
efrm = mtod(m0, u_int8_t *) + m0->m_len;
|
|
switch (subtype) {
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_BEACON:
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_AUTH:
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC:
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
case IEEE80211_FC0_SUBTYPE_ACTION:
|
|
if (vap->iv_state != IEEE80211_S_RUN ||
|
|
IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
ni->ni_inact = ni->ni_inact_reload;
|
|
if (ieee80211_parse_action(ni, m0) == 0)
|
|
ic->ic_recv_action(ni, wh, frm, efrm);
|
|
break;
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, "mgt", "subtype 0x%x not handled", subtype);
|
|
vap->iv_stats.is_rx_badsubtype++;
|
|
break;
|
|
}
|
|
}
|