5463c4a485
o replace DLT_IEEE802_11 support in net80211 with DLT_IEEE802_11_RADIO and remove explicit bpf support from wireless drivers; drivers now use ieee80211_radiotap_attach to setup shared data structures that hold the radiotap header for each packet tx/rx o remove rx timestamp from the rx path; it was used only by the tdma support for debugging and was mostly useless due to it being 32-bits and mostly unavailable o track DLT_IEEE80211_RADIO bpf attachments and maintain per-vap and per-com state when there are active taps o track the number of monitor mode vaps o use bpf tap and monitor mode vap state to decide when to collect radiotap state and dispatch frames; drivers no longer explicitly directly check bpf state or use bpf calls to tap frames o handle radiotap state updates on channel change in net80211; drivers should not do this (unless they bypass net80211 which is almost always a mistake) o update various drivers to be more consistent/correct in handling radiotap o update ral to include TSF in radiotap'd frames o add promisc mode callback to wi Reviewed by: cbzimmer, rpaulo, thompsa
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*-
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* Copyright (c) 2007-2008 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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#ifdef __FreeBSD__
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__FBSDID("$FreeBSD$");
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#endif
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/*
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* IEEE 802.11 Monitor mode support.
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*/
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#include "opt_inet.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/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/if_llc.h>
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#include <net/ethernet.h>
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#include <net/bpf.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_monitor.h>
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static void monitor_vattach(struct ieee80211vap *);
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static int monitor_newstate(struct ieee80211vap *, enum ieee80211_state, int);
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static int monitor_input(struct ieee80211_node *ni, struct mbuf *m,
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int rssi, int nf);
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void
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ieee80211_monitor_attach(struct ieee80211com *ic)
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{
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ic->ic_vattach[IEEE80211_M_MONITOR] = monitor_vattach;
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}
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void
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ieee80211_monitor_detach(struct ieee80211com *ic)
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{
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}
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static void
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monitor_vdetach(struct ieee80211vap *vap)
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{
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}
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static void
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monitor_vattach(struct ieee80211vap *vap)
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{
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vap->iv_newstate = monitor_newstate;
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vap->iv_input = monitor_input;
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vap->iv_opdetach = monitor_vdetach;
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}
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/*
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* IEEE80211_M_MONITOR vap state machine handler.
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*/
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static int
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monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
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{
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struct ieee80211com *ic = vap->iv_ic;
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enum ieee80211_state ostate;
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IEEE80211_LOCK_ASSERT(ic);
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ostate = vap->iv_state;
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
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__func__, ieee80211_state_name[ostate],
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ieee80211_state_name[nstate], arg);
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vap->iv_state = nstate; /* state transition */
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if (nstate == IEEE80211_S_RUN) {
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switch (ostate) {
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case IEEE80211_S_INIT:
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ieee80211_create_ibss(vap, ic->ic_curchan);
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break;
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default:
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break;
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}
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/*
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* NB: this shouldn't be here but many people use
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* monitor mode for raw packets; once we switch
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* them over to adhoc demo mode remove this.
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*/
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ieee80211_node_authorize(vap->iv_bss);
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}
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return 0;
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}
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/*
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* Process a received frame in monitor mode.
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*/
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static int
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monitor_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
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{
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struct ieee80211vap *vap = ni->ni_vap;
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ieee80211_radiotap_rx(vap, m);
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m_freem(m);
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return -1;
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}
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