1 /* SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1) */ 2 /* p80211conv.h 3 * 4 * Ether/802.11 conversions and packet buffer routines 5 * 6 * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved. 7 * -------------------------------------------------------------------- 8 * 9 * linux-wlan 10 * 11 * The contents of this file are subject to the Mozilla Public 12 * License Version 1.1 (the "License"); you may not use this file 13 * except in compliance with the License. You may obtain a copy of 14 * the License at http://www.mozilla.org/MPL/ 15 * 16 * Software distributed under the License is distributed on an "AS 17 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 18 * implied. See the License for the specific language governing 19 * rights and limitations under the License. 20 * 21 * Alternatively, the contents of this file may be used under the 22 * terms of the GNU Public License version 2 (the "GPL"), in which 23 * case the provisions of the GPL are applicable instead of the 24 * above. If you wish to allow the use of your version of this file 25 * only under the terms of the GPL and not to allow others to use 26 * your version of this file under the MPL, indicate your decision 27 * by deleting the provisions above and replace them with the notice 28 * and other provisions required by the GPL. If you do not delete 29 * the provisions above, a recipient may use your version of this 30 * file under either the MPL or the GPL. 31 * 32 * -------------------------------------------------------------------- 33 * 34 * Inquiries regarding the linux-wlan Open Source project can be 35 * made directly to: 36 * 37 * AbsoluteValue Systems Inc. 38 * info@linux-wlan.com 39 * http://www.linux-wlan.com 40 * 41 * -------------------------------------------------------------------- 42 * 43 * Portions of the development of this software were funded by 44 * Intersil Corporation as part of PRISM(R) chipset product development. 45 * 46 * -------------------------------------------------------------------- 47 * 48 * This file declares the functions, types and macros that perform 49 * Ethernet to/from 802.11 frame conversions. 50 * 51 * -------------------------------------------------------------------- 52 */ 53 54 #ifndef _LINUX_P80211CONV_H 55 #define _LINUX_P80211CONV_H 56 57 #define WLAN_IEEE_OUI_LEN 3 58 59 #define WLAN_ETHCONV_ENCAP 1 60 #define WLAN_ETHCONV_8021h 3 61 62 #define P80211CAPTURE_VERSION 0x80211001 63 64 #define P80211_FRMMETA_MAGIC 0x802110 65 66 struct p80211_rxmeta { 67 struct wlandevice *wlandev; 68 69 u64 mactime; /* Hi-rez MAC-supplied time value */ 70 u64 hosttime; /* Best-rez host supplied time value */ 71 72 unsigned int rxrate; /* Receive data rate in 100kbps */ 73 unsigned int priority; /* 0-15, 0=contention, 6=CF */ 74 int signal; /* An SSI, see p80211netdev.h */ 75 int noise; /* An SSI, see p80211netdev.h */ 76 unsigned int channel; /* Receive channel (mostly for snifs) */ 77 unsigned int preamble; /* P80211ENUM_preambletype_* */ 78 unsigned int encoding; /* P80211ENUM_encoding_* */ 79 80 }; 81 82 struct p80211_frmmeta { 83 unsigned int magic; 84 struct p80211_rxmeta *rx; 85 }; 86 87 void p80211skb_free(struct wlandevice *wlandev, struct sk_buff *skb); 88 int p80211skb_rxmeta_attach(struct wlandevice *wlandev, struct sk_buff *skb); 89 void p80211skb_rxmeta_detach(struct sk_buff *skb); 90 91 static inline struct p80211_frmmeta *p80211skb_frmmeta(struct sk_buff *skb) 92 { 93 struct p80211_frmmeta *frmmeta = (struct p80211_frmmeta *)skb->cb; 94 95 return frmmeta->magic == P80211_FRMMETA_MAGIC ? frmmeta : NULL; 96 } 97 98 static inline struct p80211_rxmeta *p80211skb_rxmeta(struct sk_buff *skb) 99 { 100 struct p80211_frmmeta *frmmeta = p80211skb_frmmeta(skb); 101 102 return frmmeta ? frmmeta->rx : NULL; 103 } 104 105 /* 106 * Frame capture header. (See doc/capturefrm.txt) 107 */ 108 struct p80211_caphdr { 109 __be32 version; 110 __be32 length; 111 __be64 mactime; 112 __be64 hosttime; 113 __be32 phytype; 114 __be32 channel; 115 __be32 datarate; 116 __be32 antenna; 117 __be32 priority; 118 __be32 ssi_type; 119 __be32 ssi_signal; 120 __be32 ssi_noise; 121 __be32 preamble; 122 __be32 encoding; 123 }; 124 125 struct p80211_metawep { 126 void *data; 127 u8 iv[4]; 128 u8 icv[4]; 129 }; 130 131 /* local ether header type */ 132 struct wlan_ethhdr { 133 u8 daddr[ETH_ALEN]; 134 u8 saddr[ETH_ALEN]; 135 __be16 type; 136 } __packed; 137 138 /* local llc header type */ 139 struct wlan_llc { 140 u8 dsap; 141 u8 ssap; 142 u8 ctl; 143 } __packed; 144 145 /* local snap header type */ 146 struct wlan_snap { 147 u8 oui[WLAN_IEEE_OUI_LEN]; 148 __be16 type; 149 } __packed; 150 151 /* Circular include trick */ 152 struct wlandevice; 153 154 int skb_p80211_to_ether(struct wlandevice *wlandev, u32 ethconv, 155 struct sk_buff *skb); 156 int skb_ether_to_p80211(struct wlandevice *wlandev, u32 ethconv, 157 struct sk_buff *skb, union p80211_hdr *p80211_hdr, 158 struct p80211_metawep *p80211_wep); 159 160 int p80211_stt_findproto(u16 proto); 161 162 #endif 163