2 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
30 * IEEE 802.11 NULL crypto support.
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/module.h>
37 #include <sys/socket.h>
40 #include <net/if_media.h>
41 #include <net/ethernet.h>
43 #include <net80211/ieee80211_var.h>
45 static void *none_attach(struct ieee80211com *, struct ieee80211_key *);
46 static void none_detach(struct ieee80211_key *);
47 static int none_setkey(struct ieee80211_key *);
48 static int none_encap(struct ieee80211_key *, struct mbuf *, uint8_t);
49 static int none_decap(struct ieee80211_key *, struct mbuf *, int);
50 static int none_enmic(struct ieee80211_key *, struct mbuf *, int);
51 static int none_demic(struct ieee80211_key *, struct mbuf *, int);
53 const struct ieee80211_cipher ieee80211_cipher_none = {
55 .ic_cipher = IEEE80211_CIPHER_NONE,
59 .ic_attach = none_attach,
60 .ic_detach = none_detach,
61 .ic_setkey = none_setkey,
62 .ic_encap = none_encap,
63 .ic_decap = none_decap,
64 .ic_enmic = none_enmic,
65 .ic_demic = none_demic,
69 none_attach(struct ieee80211com *ic, struct ieee80211_key *k)
71 return ic; /* for diagnostics+stats */
75 none_detach(struct ieee80211_key *k)
81 none_setkey(struct ieee80211_key *k)
88 none_encap(struct ieee80211_key *k, struct mbuf *m, uint8_t keyid)
90 struct ieee80211com *ic = k->wk_private;
91 #ifdef IEEE80211_DEBUG
92 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
96 * The specified key is not setup; this can
97 * happen, at least, when changing keys.
99 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
100 "[%s] key id %u is not set (encap)\n",
101 ether_sprintf(wh->i_addr1), keyid>>6);
102 ic->ic_stats.is_tx_badcipher++;
107 none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen)
109 struct ieee80211com *ic = k->wk_private;
110 #ifdef IEEE80211_DEBUG
111 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
112 const uint8_t *ivp = (const uint8_t *)&wh[1];
116 * The specified key is not setup; this can
117 * happen, at least, when changing keys.
119 /* XXX useful to know dst too */
120 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
121 "[%s] key id %u is not set (decap)\n",
122 ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6);
123 ic->ic_stats.is_rx_badkeyid++;
128 none_enmic(struct ieee80211_key *k, struct mbuf *m, int force)
130 struct ieee80211com *ic = k->wk_private;
132 ic->ic_stats.is_tx_badcipher++;
137 none_demic(struct ieee80211_key *k, struct mbuf *m, int force)
139 struct ieee80211com *ic = k->wk_private;
141 ic->ic_stats.is_rx_badkeyid++;