1/*- 2 * Copyright (c) 2002-2008 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 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD: releng/10.3/sys/net80211/ieee80211_crypto_none.c 178354 2008-04-20 20:35:46Z sam $"); 28 29/* 30 * IEEE 802.11 NULL crypto support. 31 */ 32#include "opt_wlan.h" 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/mbuf.h> 38#include <sys/module.h> 39 40#include <sys/socket.h> 41 42#include <net/if.h> 43#include <net/if_media.h> 44#include <net/ethernet.h> 45 46#include <net80211/ieee80211_var.h> 47 48static void *none_attach(struct ieee80211vap *, struct ieee80211_key *); 49static void none_detach(struct ieee80211_key *); 50static int none_setkey(struct ieee80211_key *); 51static int none_encap(struct ieee80211_key *, struct mbuf *, uint8_t); 52static int none_decap(struct ieee80211_key *, struct mbuf *, int); 53static int none_enmic(struct ieee80211_key *, struct mbuf *, int); 54static int none_demic(struct ieee80211_key *, struct mbuf *, int); 55 56const struct ieee80211_cipher ieee80211_cipher_none = { 57 .ic_name = "NONE", 58 .ic_cipher = IEEE80211_CIPHER_NONE, 59 .ic_header = 0, 60 .ic_trailer = 0, 61 .ic_miclen = 0, 62 .ic_attach = none_attach, 63 .ic_detach = none_detach, 64 .ic_setkey = none_setkey, 65 .ic_encap = none_encap, 66 .ic_decap = none_decap, 67 .ic_enmic = none_enmic, 68 .ic_demic = none_demic, 69}; 70 71static void * 72none_attach(struct ieee80211vap *vap, struct ieee80211_key *k) 73{ 74 return vap; /* for diagnostics+stats */ 75} 76 77static void 78none_detach(struct ieee80211_key *k) 79{ 80 (void) k; 81} 82 83static int 84none_setkey(struct ieee80211_key *k) 85{ 86 (void) k; 87 return 1; 88} 89 90static int 91none_encap(struct ieee80211_key *k, struct mbuf *m, uint8_t keyid) 92{ 93 struct ieee80211vap *vap = k->wk_private; 94#ifdef IEEE80211_DEBUG 95 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 96#endif 97 98 /* 99 * The specified key is not setup; this can 100 * happen, at least, when changing keys. 101 */ 102 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr1, 103 "key id %u is not set (encap)", keyid>>6); 104 vap->iv_stats.is_tx_badcipher++; 105 return 0; 106} 107 108static int 109none_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen) 110{ 111 struct ieee80211vap *vap = k->wk_private; 112#ifdef IEEE80211_DEBUG 113 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 114 const uint8_t *ivp = (const uint8_t *)&wh[1]; 115#endif 116 117 /* 118 * The specified key is not setup; this can 119 * happen, at least, when changing keys. 120 */ 121 /* XXX useful to know dst too */ 122 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 123 "key id %u is not set (decap)", ivp[IEEE80211_WEP_IVLEN] >> 6); 124 vap->iv_stats.is_rx_badkeyid++; 125 return 0; 126} 127 128static int 129none_enmic(struct ieee80211_key *k, struct mbuf *m, int force) 130{ 131 struct ieee80211vap *vap = k->wk_private; 132 133 vap->iv_stats.is_tx_badcipher++; 134 return 0; 135} 136 137static int 138none_demic(struct ieee80211_key *k, struct mbuf *m, int force) 139{ 140 struct ieee80211vap *vap = k->wk_private; 141 142 vap->iv_stats.is_rx_badkeyid++; 143 return 0; 144} 145