1 /* p80211conv.h 2 * 3 * Ether/802.11 conversions and packet buffer routines 4 * 5 * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved. 6 * -------------------------------------------------------------------- 7 * 8 * linux-wlan 9 * 10 * The contents of this file are subject to the Mozilla Public 11 * License Version 1.1 (the "License"); you may not use this file 12 * except in compliance with the License. You may obtain a copy of 13 * the License at http://www.mozilla.org/MPL/ 14 * 15 * Software distributed under the License is distributed on an "AS 16 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 17 * implied. See the License for the specific language governing 18 * rights and limitations under the License. 19 * 20 * Alternatively, the contents of this file may be used under the 21 * terms of the GNU Public License version 2 (the "GPL"), in which 22 * case the provisions of the GPL are applicable instead of the 23 * above. If you wish to allow the use of your version of this file 24 * only under the terms of the GPL and not to allow others to use 25 * your version of this file under the MPL, indicate your decision 26 * by deleting the provisions above and replace them with the notice 27 * and other provisions required by the GPL. If you do not delete 28 * the provisions above, a recipient may use your version of this 29 * file under either the MPL or the GPL. 30 * 31 * -------------------------------------------------------------------- 32 * 33 * Inquiries regarding the linux-wlan Open Source project can be 34 * made directly to: 35 * 36 * AbsoluteValue Systems Inc. 37 * info@linux-wlan.com 38 * http://www.linux-wlan.com 39 * 40 * -------------------------------------------------------------------- 41 * 42 * Portions of the development of this software were funded by 43 * Intersil Corporation as part of PRISM(R) chipset product development. 44 * 45 * -------------------------------------------------------------------- 46 * 47 * This file declares the functions, types and macros that perform 48 * Ethernet to/from 802.11 frame conversions. 49 * 50 * -------------------------------------------------------------------- 51 */ 52 53 #ifndef _LINUX_P80211CONV_H 54 #define _LINUX_P80211CONV_H 55 56 /*================================================================*/ 57 /* Constants */ 58 59 #define WLAN_ETHADDR_LEN 6 60 #define WLAN_IEEE_OUI_LEN 3 61 62 #define WLAN_ETHCONV_ENCAP 1 63 #define WLAN_ETHCONV_RFC1042 2 64 #define WLAN_ETHCONV_8021h 3 65 66 #define WLAN_MIN_ETHFRM_LEN 60 67 #define WLAN_MAX_ETHFRM_LEN 1514 68 #define WLAN_ETHHDR_LEN 14 69 70 #define P80211CAPTURE_VERSION 0x80211001 71 72 /*================================================================*/ 73 /* Macros */ 74 75 #define P80211_FRMMETA_MAGIC 0x802110 76 77 #define P80211SKB_FRMMETA(s) \ 78 (((((p80211_frmmeta_t*)((s)->cb))->magic)==P80211_FRMMETA_MAGIC) ? \ 79 ((p80211_frmmeta_t*)((s)->cb)) : \ 80 (NULL)) 81 82 #define P80211SKB_RXMETA(s) \ 83 (P80211SKB_FRMMETA((s)) ? P80211SKB_FRMMETA((s))->rx : ((p80211_rxmeta_t*)(NULL))) 84 85 typedef struct p80211_rxmeta 86 { 87 struct wlandevice *wlandev; 88 89 u64 mactime; /* Hi-rez MAC-supplied time value */ 90 u64 hosttime; /* Best-rez host supplied time value */ 91 92 unsigned int rxrate; /* Receive data rate in 100kbps */ 93 unsigned int priority; /* 0-15, 0=contention, 6=CF */ 94 int signal; /* An SSI, see p80211netdev.h */ 95 int noise; /* An SSI, see p80211netdev.h */ 96 unsigned int channel; /* Receive channel (mostly for snifs) */ 97 unsigned int preamble; /* P80211ENUM_preambletype_* */ 98 unsigned int encoding; /* P80211ENUM_encoding_* */ 99 100 } p80211_rxmeta_t; 101 102 typedef struct p80211_frmmeta 103 { 104 unsigned int magic; 105 p80211_rxmeta_t *rx; 106 } p80211_frmmeta_t; 107 108 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb); 109 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb); 110 void p80211skb_rxmeta_detach(struct sk_buff *skb); 111 112 /*================================================================*/ 113 /* Types */ 114 115 /* 116 * Frame capture header. (See doc/capturefrm.txt) 117 */ 118 typedef struct p80211_caphdr 119 { 120 u32 version; 121 u32 length; 122 u64 mactime; 123 u64 hosttime; 124 u32 phytype; 125 u32 channel; 126 u32 datarate; 127 u32 antenna; 128 u32 priority; 129 u32 ssi_type; 130 s32 ssi_signal; 131 s32 ssi_noise; 132 u32 preamble; 133 u32 encoding; 134 } p80211_caphdr_t; 135 136 /* buffer free method pointer type */ 137 typedef void (* freebuf_method_t)(void *buf, int size); 138 139 typedef struct p80211_metawep { 140 void *data; 141 u8 iv[4]; 142 u8 icv[4]; 143 } p80211_metawep_t; 144 145 /* local ether header type */ 146 typedef struct wlan_ethhdr 147 { 148 u8 daddr[WLAN_ETHADDR_LEN]; 149 u8 saddr[WLAN_ETHADDR_LEN]; 150 u16 type; 151 } __WLAN_ATTRIB_PACK__ wlan_ethhdr_t; 152 153 /* local llc header type */ 154 typedef struct wlan_llc 155 { 156 u8 dsap; 157 u8 ssap; 158 u8 ctl; 159 } __WLAN_ATTRIB_PACK__ wlan_llc_t; 160 161 /* local snap header type */ 162 typedef struct wlan_snap 163 { 164 u8 oui[WLAN_IEEE_OUI_LEN]; 165 u16 type; 166 } __WLAN_ATTRIB_PACK__ wlan_snap_t; 167 168 /* Circular include trick */ 169 struct wlandevice; 170 171 /*================================================================*/ 172 /* Externs */ 173 174 /*================================================================*/ 175 /*Function Declarations */ 176 177 int skb_p80211_to_ether( struct wlandevice *wlandev, u32 ethconv, 178 struct sk_buff *skb); 179 int skb_ether_to_p80211( struct wlandevice *wlandev, u32 ethconv, 180 struct sk_buff *skb, p80211_hdr_t *p80211_hdr, 181 p80211_metawep_t *p80211_wep ); 182 183 int p80211_stt_findproto(u16 proto); 184 int p80211_stt_addproto(u16 proto); 185 186 #endif 187