wlan - Update wlan from Adrian / FreeBSD
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_monitor.c
CommitLineData
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1/*-
2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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24 */
25
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26#include <sys/cdefs.h>
27#ifdef __FreeBSD__
28__FBSDID("$FreeBSD$");
29#endif
30
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31/*
32 * IEEE 802.11 Monitor mode support.
33 */
34#include "opt_inet.h"
35#include "opt_wlan.h"
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/mbuf.h>
40#include <sys/malloc.h>
41#include <sys/kernel.h>
42
43#include <sys/socket.h>
44#include <sys/sockio.h>
45#include <sys/endian.h>
46#include <sys/errno.h>
47#include <sys/proc.h>
48#include <sys/sysctl.h>
49
50#include <net/if.h>
085ff963 51#include <net/if_var.h>
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52#include <net/if_media.h>
53#include <net/if_llc.h>
54#include <net/ethernet.h>
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55
56#include <net/bpf.h>
57
58#include <netproto/802_11/ieee80211_var.h>
59#include <netproto/802_11/ieee80211_monitor.h>
60
61static void monitor_vattach(struct ieee80211vap *);
62static int monitor_newstate(struct ieee80211vap *, enum ieee80211_state, int);
63static int monitor_input(struct ieee80211_node *ni, struct mbuf *m,
64 int rssi, int nf);
65
66void
67ieee80211_monitor_attach(struct ieee80211com *ic)
68{
69 ic->ic_vattach[IEEE80211_M_MONITOR] = monitor_vattach;
70}
71
72void
73ieee80211_monitor_detach(struct ieee80211com *ic)
74{
75}
76
77static void
78monitor_vdetach(struct ieee80211vap *vap)
79{
80}
81
82static void
83monitor_vattach(struct ieee80211vap *vap)
84{
85 vap->iv_newstate = monitor_newstate;
86 vap->iv_input = monitor_input;
87 vap->iv_opdetach = monitor_vdetach;
88}
89
90/*
91 * IEEE80211_M_MONITOR vap state machine handler.
92 */
93static int
94monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
95{
96 struct ieee80211com *ic = vap->iv_ic;
97 enum ieee80211_state ostate;
98
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99 IEEE80211_LOCK_ASSERT(ic);
100
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101 ostate = vap->iv_state;
102 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
103 __func__, ieee80211_state_name[ostate],
104 ieee80211_state_name[nstate], arg);
105 vap->iv_state = nstate; /* state transition */
106 if (nstate == IEEE80211_S_RUN) {
107 switch (ostate) {
108 case IEEE80211_S_INIT:
109 ieee80211_create_ibss(vap, ic->ic_curchan);
110 break;
111 default:
112 break;
113 }
114 /*
115 * NB: this shouldn't be here but many people use
116 * monitor mode for raw packets; once we switch
117 * them over to adhoc demo mode remove this.
118 */
119 ieee80211_node_authorize(vap->iv_bss);
120 }
121 return 0;
122}
123
124/*
125 * Process a received frame in monitor mode.
126 */
127static int
128monitor_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
129{
130 struct ieee80211vap *vap = ni->ni_vap;
131 struct ifnet *ifp = vap->iv_ifp;
132
d40991ef 133 IFNET_STAT_INC(ifp, ipackets, 1);
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134
135 if (ieee80211_radiotap_active_vap(vap))
136 ieee80211_radiotap_rx(vap, m);
137 m_freem(m);
138 return -1;
139}