Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_proto.h
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1 /* $NetBSD: ieee80211_proto.h,v 1.24 2021/07/24 21:31:38 andvar Exp $ */ 2 /*- 3 * Copyright (c) 2001 Atsushi Onoe 4 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * Alternatively, this software may be distributed under the terms of the 19 * GNU General Public License ("GPL") version 2 as published by the Free 20 * Software Foundation. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * $FreeBSD: src/sys/net80211/ieee80211_proto.h,v 1.16 2005/08/13 17:31:48 sam Exp $ 34 */ 35 #ifndef _NET80211_IEEE80211_PROTO_H_ 36 #define _NET80211_IEEE80211_PROTO_H_ 37 38 /* 39 * 802.11 protocol implementation definitions. 40 */ 41 42 enum ieee80211_state { 43 IEEE80211_S_INIT = 0, /* default state */ 44 IEEE80211_S_SCAN = 1, /* scanning */ 45 IEEE80211_S_AUTH = 2, /* try to authenticate */ 46 IEEE80211_S_ASSOC = 3, /* try to assoc */ 47 IEEE80211_S_RUN = 4 /* associated */ 48 }; 49 #define IEEE80211_S_MAX ((int)IEEE80211_S_RUN + 1) 50 51 #define IEEE80211_SEND_MGMT(_ic,_ni,_type,_arg) \ 52 ((*(_ic)->ic_send_mgmt)(_ic, _ni, _type, _arg)) 53 54 extern const char *ieee80211_mgt_subtype_name[]; 55 extern const char *ieee80211_phymode_name[]; 56 57 void ieee80211_proto_attach(struct ieee80211com *); 58 void ieee80211_proto_detach(struct ieee80211com *); 59 60 struct ieee80211_node; 61 int ieee80211_input(struct ieee80211com *, struct mbuf *, 62 struct ieee80211_node *, int, u_int32_t); 63 int ieee80211_setup_rates(struct ieee80211_node *ni, 64 const u_int8_t *rates, const u_int8_t *xrates, int flags); 65 void ieee80211_saveie(u_int8_t **, const u_int8_t *); 66 void ieee80211_recv_mgmt(struct ieee80211com *, struct mbuf *, 67 struct ieee80211_node *, int, int, u_int32_t); 68 int ieee80211_send_nulldata(struct ieee80211_node *); 69 int ieee80211_send_probereq(struct ieee80211_node *ni, 70 const u_int8_t sa[IEEE80211_ADDR_LEN], 71 const u_int8_t da[IEEE80211_ADDR_LEN], 72 const u_int8_t bssid[IEEE80211_ADDR_LEN], 73 const u_int8_t *ssid, size_t ssidlen, 74 const void *optie, size_t optielen); 75 int ieee80211_send_mgmt(struct ieee80211com *, struct ieee80211_node *, 76 int, int); 77 int ieee80211_classify(struct ieee80211com *, struct mbuf *, 78 struct ieee80211_node *); 79 struct mbuf *ieee80211_encap(struct ieee80211com *, struct mbuf *, 80 struct ieee80211_node *); 81 struct mbuf *ieee80211_get_rts(struct ieee80211com *, 82 const struct ieee80211_frame *, uint16_t); 83 struct mbuf *ieee80211_get_cts_to_self(struct ieee80211com *, 84 uint16_t); 85 void ieee80211_pwrsave(struct ieee80211com *, struct ieee80211_node *, 86 struct mbuf *); 87 88 u_int8_t *ieee80211_add_rates(u_int8_t *, const struct ieee80211_rateset *); 89 u_int8_t *ieee80211_add_xrates(u_int8_t *, const struct ieee80211_rateset *); 90 u_int8_t *ieee80211_add_ssid(u_int8_t *, const u_int8_t *, u_int); 91 u_int8_t *ieee80211_add_wpa(u_int8_t *, struct ieee80211com *); 92 struct ieee80211_wme_state; 93 u_int8_t *ieee80211_add_wme_info(u_int8_t *, struct ieee80211_wme_state *); 94 95 void ieee80211_reset_erp(struct ieee80211com *); 96 void ieee80211_set_shortslottime(struct ieee80211com *, int onoff); 97 int ieee80211_iserp_rateset(struct ieee80211com *, 98 struct ieee80211_rateset *); 99 void ieee80211_set11gbasicrates(struct ieee80211_rateset *, 100 enum ieee80211_phymode); 101 102 /* 103 * Return the size of the 802.11 header for a management or data frame. 104 */ 105 static __inline int 106 ieee80211_hdrsize(const void *data) 107 { 108 const struct ieee80211_frame *wh = data; 109 int size = sizeof(struct ieee80211_frame); 110 111 /* NB: we don't handle control frames */ 112 IASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL, 113 ("%s: control frame", __func__)); 114 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) 115 size += IEEE80211_ADDR_LEN; 116 if (ieee80211_has_qos(wh)) 117 size += sizeof(u_int16_t); 118 return size; 119 } 120 121 /* 122 * Return the size of the 802.11 header; handles any type of frame. 123 */ 124 static __inline int 125 ieee80211_anyhdrsize(const void *data) 126 { 127 const struct ieee80211_frame *wh = data; 128 129 if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) { 130 switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { 131 case IEEE80211_FC0_SUBTYPE_CTS: 132 case IEEE80211_FC0_SUBTYPE_ACK: 133 return sizeof(struct ieee80211_frame_ack); 134 } 135 return sizeof(struct ieee80211_frame_min); 136 } else 137 return ieee80211_hdrsize(data); 138 } 139 140 /* 141 * Template for an in-kernel authenticator. Authenticators 142 * register with the protocol code and are typically loaded 143 * as separate modules as needed. 144 */ 145 struct ieee80211_authenticator { 146 const char *ia_name; /* printable name */ 147 int (*ia_attach)(struct ieee80211com *); 148 void (*ia_detach)(struct ieee80211com *); 149 void (*ia_node_join)(struct ieee80211com *, 150 struct ieee80211_node *); 151 void (*ia_node_leave)(struct ieee80211com *, 152 struct ieee80211_node *); 153 }; 154 void ieee80211_authenticator_register(int type, 155 const struct ieee80211_authenticator *); 156 void ieee80211_authenticator_unregister(int type); 157 const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth); 158 159 struct ieee80211req; 160 /* 161 * Template for an MAC ACL policy module. Such modules 162 * register with the protocol code and are passed the sender's 163 * address of each received frame for validation. 164 */ 165 struct ieee80211_aclator { 166 const char *iac_name; /* printable name */ 167 int (*iac_attach)(struct ieee80211com *); 168 void (*iac_detach)(struct ieee80211com *); 169 int (*iac_check)(struct ieee80211com *, 170 const u_int8_t mac[IEEE80211_ADDR_LEN]); 171 int (*iac_add)(struct ieee80211com *, 172 const u_int8_t mac[IEEE80211_ADDR_LEN]); 173 int (*iac_remove)(struct ieee80211com *, 174 const u_int8_t mac[IEEE80211_ADDR_LEN]); 175 int (*iac_flush)(struct ieee80211com *); 176 int (*iac_setpolicy)(struct ieee80211com *, int); 177 int (*iac_getpolicy)(struct ieee80211com *); 178 int (*iac_setioctl)(struct ieee80211com *, struct ieee80211req *); 179 int (*iac_getioctl)(struct ieee80211com *, struct ieee80211req *); 180 }; 181 void ieee80211_aclator_register(const struct ieee80211_aclator *); 182 void ieee80211_aclator_unregister(const struct ieee80211_aclator *); 183 const struct ieee80211_aclator *ieee80211_aclator_get(const char *name); 184 185 /* flags for ieee80211_fix_rate() */ 186 #define IEEE80211_R_DOSORT 0x00000001 /* sort rate list */ 187 #define IEEE80211_R_DOFRATE 0x00000002 /* use fixed rate */ 188 #define IEEE80211_R_DONEGO 0x00000004 /* calc negotiated rate */ 189 #define IEEE80211_R_DODEL 0x00000008 /* delete ignore rate */ 190 int ieee80211_fix_rate(struct ieee80211_node *, int); 191 192 /* 193 * WME/WMM support. 194 */ 195 struct wmeParams { 196 u_int8_t wmep_acm; 197 u_int8_t wmep_aifsn; 198 u_int8_t wmep_logcwmin; /* log2(cwmin) */ 199 u_int8_t wmep_logcwmax; /* log2(cwmax) */ 200 u_int8_t wmep_txopLimit; 201 u_int8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */ 202 }; 203 #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5) 204 #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5) 205 206 struct chanAccParams { 207 u_int8_t cap_info; /* version of the current set */ 208 struct wmeParams cap_wmeParams[WME_NUM_AC]; 209 }; 210 211 struct ieee80211_wme_state { 212 u_int wme_flags; 213 #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME aggressive mode */ 214 u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */ 215 u_int wme_hipri_switch_thresh;/* aggressive mode switch thresh */ 216 u_int wme_hipri_switch_hysteresis;/* aggressive mode switch hysteresis */ 217 218 struct wmeParams wme_params[4]; /* from assoc resp for each AC*/ 219 struct chanAccParams wme_wmeChanParams; /* WME params applied to self */ 220 struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */ 221 struct chanAccParams wme_chanParams; /* params applied to self */ 222 struct chanAccParams wme_bssChanParams; /* params bcast to stations */ 223 224 int (*wme_update)(struct ieee80211com *); 225 }; 226 227 void ieee80211_wme_initparams(struct ieee80211com *); 228 void ieee80211_wme_updateparams(struct ieee80211com *); 229 void ieee80211_wme_updateparams_locked(struct ieee80211com *); 230 231 #define ieee80211_new_state(_ic, _nstate, _arg) \ 232 (((_ic)->ic_newstate)((_ic), (_nstate), (_arg))) 233 int ieee80211_compute_duration(const struct ieee80211_frame_min *, 234 const struct ieee80211_key *, int, 235 uint32_t, int, int, struct ieee80211_duration *, 236 struct ieee80211_duration *, int *, int); 237 void ieee80211_beacon_miss(struct ieee80211com *); 238 void ieee80211_print_essid(const u_int8_t *, int); 239 void ieee80211_dump_pkt(const u_int8_t *, int, int, int); 240 241 extern const char *ieee80211_state_name[IEEE80211_S_MAX]; 242 extern const char *ieee80211_wme_acnames[]; 243 244 /* 245 * Beacon frames constructed by ieee80211_beacon_alloc 246 * have the following structure filled in so drivers 247 * can update the frame later w/ minimal overhead. 248 */ 249 struct ieee80211_beacon_offsets { 250 u_int16_t *bo_caps; /* capabilities */ 251 u_int8_t *bo_tim; /* start of atim/dtim */ 252 u_int8_t *bo_wme; /* start of WME parameters */ 253 u_int8_t *bo_trailer; /* start of fixed-size trailer */ 254 u_int16_t bo_tim_len; /* atim/dtim length in bytes */ 255 u_int16_t bo_trailer_len; /* trailer length in bytes */ 256 }; 257 struct mbuf *ieee80211_beacon_alloc(struct ieee80211com *, 258 struct ieee80211_node *, struct ieee80211_beacon_offsets *); 259 int ieee80211_beacon_update(struct ieee80211com *, 260 struct ieee80211_node *, struct ieee80211_beacon_offsets *, 261 struct mbuf *, int broadcast); 262 263 /* 264 * Notification methods called from the 802.11 state machine. 265 * Note that while these are defined here, their implementation 266 * is OS-specific. 267 */ 268 void ieee80211_notify_node_join(struct ieee80211com *, 269 struct ieee80211_node *, int newassoc); 270 void ieee80211_notify_node_leave(struct ieee80211com *, 271 struct ieee80211_node *); 272 void ieee80211_notify_scan_done(struct ieee80211com *); 273 274 #endif /* !_NET80211_IEEE80211_PROTO_H_ */
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