2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
33 * IEEE 802.11 Monitor mode support.
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/malloc.h>
42 #include <sys/kernel.h>
44 #include <sys/socket.h>
45 #include <sys/sockio.h>
46 #include <sys/endian.h>
47 #include <sys/errno.h>
49 #include <sys/sysctl.h>
52 #include <net/if_var.h>
53 #include <net/if_media.h>
54 #include <net/if_llc.h>
55 #include <net/ethernet.h>
59 #include <net80211/ieee80211_var.h>
60 #include <net80211/ieee80211_monitor.h>
62 static void monitor_vattach(struct ieee80211vap *);
63 static int monitor_newstate(struct ieee80211vap *, enum ieee80211_state, int);
64 static int monitor_input(struct ieee80211_node *ni, struct mbuf *m,
65 const struct ieee80211_rx_stats *rxs, int rssi, int nf);
68 ieee80211_monitor_attach(struct ieee80211com *ic)
70 ic->ic_vattach[IEEE80211_M_MONITOR] = monitor_vattach;
74 ieee80211_monitor_detach(struct ieee80211com *ic)
79 monitor_vdetach(struct ieee80211vap *vap)
84 monitor_vattach(struct ieee80211vap *vap)
86 vap->iv_newstate = monitor_newstate;
87 vap->iv_input = monitor_input;
88 vap->iv_opdetach = monitor_vdetach;
92 * IEEE80211_M_MONITOR vap state machine handler.
95 monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
97 struct ieee80211com *ic = vap->iv_ic;
98 enum ieee80211_state ostate;
100 IEEE80211_LOCK_ASSERT(ic);
102 ostate = vap->iv_state;
103 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
104 __func__, ieee80211_state_name[ostate],
105 ieee80211_state_name[nstate], arg);
106 vap->iv_state = nstate; /* state transition */
107 if (nstate == IEEE80211_S_RUN) {
109 case IEEE80211_S_INIT:
110 ieee80211_create_ibss(vap, ic->ic_curchan);
116 * NB: this shouldn't be here but many people use
117 * monitor mode for raw packets; once we switch
118 * them over to adhoc demo mode remove this.
120 ieee80211_node_authorize(vap->iv_bss);
126 * Process a received frame in monitor mode.
129 monitor_input(struct ieee80211_node *ni, struct mbuf *m,
130 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
132 struct ieee80211vap *vap = ni->ni_vap;
133 struct ifnet *ifp = vap->iv_ifp;
135 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
137 if (ieee80211_radiotap_active_vap(vap))
138 ieee80211_radiotap_rx(vap, m);