ieee80211_crypto_none.c revision 139510
17063Sphk/*- 250479Speter * Copyright (c) 2002-2004 Sam Leffler, Errno Consulting 37063Sphk * All rights reserved. 419571Sjoerg * 519571Sjoerg * Redistribution and use in source and binary forms, with or without 619571Sjoerg * modification, are permitted provided that the following conditions 719571Sjoerg * are met: 823257Sjoerg * 1. Redistributions of source code must retain the above copyright 945055Sjkh * notice, this list of conditions and the following disclaimer. 1045055Sjkh * 2. Redistributions in binary form must reproduce the above copyright 11174371Slulf * notice, this list of conditions and the following disclaimer in the 12174371Slulf * documentation and/or other materials provided with the distribution. 1319571Sjoerg * 3. The name of the author may not be used to endorse or promote products 1419571Sjoerg * derived from this software without specific prior written permission. 1519571Sjoerg * 1619571Sjoerg * Alternatively, this software may be distributed under the terms of the 1719571Sjoerg * GNU General Public License ("GPL") version 2 as published by the Free 1819571Sjoerg * Software Foundation. 1985691Sbrian * 2019571Sjoerg * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 2119571Sjoerg * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2285691Sbrian * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2319571Sjoerg * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2419571Sjoerg * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2519571Sjoerg * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2619571Sjoerg * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2719999Sjoerg * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28134635Skeramida * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2919999Sjoerg * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3019571Sjoerg */ 317063Sphk 327063Sphk#include <sys/cdefs.h> 337063Sphk__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_crypto_none.c 139510 2004-12-31 20:58:06Z sam $"); 347063Sphk 3519571Sjoerg/* 3619571Sjoerg * IEEE 802.11 NULL crypto support. 377063Sphk */ 3819571Sjoerg#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/mbuf.h> 41#include <sys/module.h> 42 43#include <sys/socket.h> 44 45#include <net/if.h> 46#include <net/if_media.h> 47#include <net/ethernet.h> 48 49#include <net80211/ieee80211_var.h> 50 51static void *none_attach(struct ieee80211com *, struct ieee80211_key *); 52static void none_detach(struct ieee80211_key *); 53static int none_setkey(struct ieee80211_key *); 54static int none_encap(struct ieee80211_key *, struct mbuf *, u_int8_t); 55static int none_decap(struct ieee80211_key *, struct mbuf *); 56static int none_enmic(struct ieee80211_key *, struct mbuf *); 57static int none_demic(struct ieee80211_key *, struct mbuf *); 58 59const struct ieee80211_cipher ieee80211_cipher_none = { 60 .ic_name = "NONE", 61 .ic_cipher = IEEE80211_CIPHER_NONE, 62 .ic_header = 0, 63 .ic_trailer = 0, 64 .ic_miclen = 0, 65 .ic_attach = none_attach, 66 .ic_detach = none_detach, 67 .ic_setkey = none_setkey, 68 .ic_encap = none_encap, 69 .ic_decap = none_decap, 70 .ic_enmic = none_enmic, 71 .ic_demic = none_demic, 72}; 73 74static void * 75none_attach(struct ieee80211com *ic, struct ieee80211_key *k) 76{ 77 return ic; /* for diagnostics+stats */ 78} 79 80static void 81none_detach(struct ieee80211_key *k) 82{ 83 (void) k; 84} 85 86static int 87none_setkey(struct ieee80211_key *k) 88{ 89 (void) k; 90 return 1; 91} 92 93static int 94none_encap(struct ieee80211_key *k, struct mbuf *m, u_int8_t keyid) 95{ 96 struct ieee80211com *ic = k->wk_private; 97#ifdef IEEE80211_DEBUG 98 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 99#endif 100 101 /* 102 * The specified key is not setup; this can 103 * happen, at least, when changing keys. 104 */ 105 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 106 "[%s] key id %u is not set (encap)\n", 107 ether_sprintf(wh->i_addr1), keyid>>6); 108 ic->ic_stats.is_tx_badcipher++; 109 return 0; 110} 111 112static int 113none_decap(struct ieee80211_key *k, struct mbuf *m) 114{ 115 struct ieee80211com *ic = k->wk_private; 116#ifdef IEEE80211_DEBUG 117 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); 118 const u_int8_t *ivp = (const u_int8_t *)&wh[1]; 119#endif 120 121 /* 122 * The specified key is not setup; this can 123 * happen, at least, when changing keys. 124 */ 125 /* XXX useful to know dst too */ 126 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 127 "[%s] key id %u is not set (decap)\n", 128 ether_sprintf(wh->i_addr2), ivp[IEEE80211_WEP_IVLEN] >> 6); 129 ic->ic_stats.is_rx_badkeyid++; 130 return 0; 131} 132 133static int 134none_enmic(struct ieee80211_key *k, struct mbuf *m) 135{ 136 struct ieee80211com *ic = k->wk_private; 137 138 ic->ic_stats.is_tx_badcipher++; 139 return 0; 140} 141 142static int 143none_demic(struct ieee80211_key *k, struct mbuf *m) 144{ 145 struct ieee80211com *ic = k->wk_private; 146 147 ic->ic_stats.is_rx_badkeyid++; 148 return 0; 149} 150