wlan - Rip out all wlan locks part 1/2
[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.
24 *
25 * $FreeBSD: head/sys/net80211/ieee80211_monitor.c 193287 2009-06-02 00:04:10Z sam $
26 * $DragonFly$
27 */
28
29/*
30 * IEEE 802.11 Monitor mode support.
31 */
32#include "opt_inet.h"
33#include "opt_wlan.h"
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/mbuf.h>
38#include <sys/malloc.h>
39#include <sys/kernel.h>
40
41#include <sys/socket.h>
42#include <sys/sockio.h>
43#include <sys/endian.h>
44#include <sys/errno.h>
45#include <sys/proc.h>
46#include <sys/sysctl.h>
47
48#include <net/if.h>
49#include <net/if_media.h>
50#include <net/if_llc.h>
51#include <net/ethernet.h>
52#include <net/route.h>
53
54#include <net/bpf.h>
55
56#include <netproto/802_11/ieee80211_var.h>
57#include <netproto/802_11/ieee80211_monitor.h>
58
59static void monitor_vattach(struct ieee80211vap *);
60static int monitor_newstate(struct ieee80211vap *, enum ieee80211_state, int);
61static int monitor_input(struct ieee80211_node *ni, struct mbuf *m,
62 int rssi, int nf);
63
64void
65ieee80211_monitor_attach(struct ieee80211com *ic)
66{
67 ic->ic_vattach[IEEE80211_M_MONITOR] = monitor_vattach;
68}
69
70void
71ieee80211_monitor_detach(struct ieee80211com *ic)
72{
73}
74
75static void
76monitor_vdetach(struct ieee80211vap *vap)
77{
78}
79
80static void
81monitor_vattach(struct ieee80211vap *vap)
82{
83 vap->iv_newstate = monitor_newstate;
84 vap->iv_input = monitor_input;
85 vap->iv_opdetach = monitor_vdetach;
86}
87
88/*
89 * IEEE80211_M_MONITOR vap state machine handler.
90 */
91static int
92monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
93{
94 struct ieee80211com *ic = vap->iv_ic;
95 enum ieee80211_state ostate;
96
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97 ostate = vap->iv_state;
98 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
99 __func__, ieee80211_state_name[ostate],
100 ieee80211_state_name[nstate], arg);
101 vap->iv_state = nstate; /* state transition */
102 if (nstate == IEEE80211_S_RUN) {
103 switch (ostate) {
104 case IEEE80211_S_INIT:
105 ieee80211_create_ibss(vap, ic->ic_curchan);
106 break;
107 default:
108 break;
109 }
110 /*
111 * NB: this shouldn't be here but many people use
112 * monitor mode for raw packets; once we switch
113 * them over to adhoc demo mode remove this.
114 */
115 ieee80211_node_authorize(vap->iv_bss);
116 }
117 return 0;
118}
119
120/*
121 * Process a received frame in monitor mode.
122 */
123static int
124monitor_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
125{
126 struct ieee80211vap *vap = ni->ni_vap;
127 struct ifnet *ifp = vap->iv_ifp;
128
129 ifp->if_ipackets++;
130
131 if (ieee80211_radiotap_active_vap(vap))
132 ieee80211_radiotap_rx(vap, m);
133 m_freem(m);
134 return -1;
135}