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 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 #ifndef _NET80211_IEEE80211_PROTO_H_ 29 #define _NET80211_IEEE80211_PROTO_H_ 30 31 /* 32 * 802.11 protocol implementation definitions. 33 */ 34 35 enum ieee80211_state { 36 IEEE80211_S_INIT = 0, /* default state */ 37 IEEE80211_S_SCAN = 1, /* scanning */ 38 IEEE80211_S_AUTH = 2, /* try to authenticate */ 39 IEEE80211_S_ASSOC = 3, /* try to assoc */ 40 IEEE80211_S_CAC = 4, /* doing channel availability check */ 41 IEEE80211_S_RUN = 5, /* operational (e.g. associated) */ 42 IEEE80211_S_CSA = 6, /* channel switch announce pending */ 43 IEEE80211_S_SLEEP = 7, /* power save */ 44 }; 45 #define IEEE80211_S_MAX (IEEE80211_S_SLEEP+1) 46 47 #define IEEE80211_SEND_MGMT(_ic,_ni,_type,_arg) \ 48 ((*(_ic)->ic_send_mgmt)(_ic, _ni, _type, _arg)) 49 50 /* 51 * The formation of some management frames requires guidance to 52 * deal with legacy clients. When the client is identified as 53 * "legacy 11b" this parameter can be passed in the arg param of a 54 * IEEE80211_SEND_MGMT call. 55 */ 56 #define IEEE80211_SEND_LEGACY_11B 0x1 /* legacy 11b client */ 57 #define IEEE80211_SEND_LEGACY_11 0x2 /* other legacy client */ 58 #define IEEE80211_SEND_LEGACY 0x3 /* any legacy client */ 59 60 extern const char *ieee80211_mgt_subtype_name[]; 61 extern const char *ieee80211_phymode_name[]; 62 63 void ieee80211_proto_attach(struct ieee80211com *); 64 void ieee80211_proto_detach(struct ieee80211com *); 65 66 struct ieee80211_node; 67 int ieee80211_input(struct ieee80211com *, struct mbuf *, 68 struct ieee80211_node *, int, int, uint32_t); 69 void ieee80211_deliver_data(struct ieee80211com *, 70 struct ieee80211_node *, struct mbuf *); 71 struct mbuf *ieee80211_decap1(struct mbuf *, int *); 72 int ieee80211_setup_rates(struct ieee80211_node *ni, 73 const uint8_t *rates, const uint8_t *xrates, int flags); 74 void ieee80211_saveie(uint8_t **, const uint8_t *); 75 void ieee80211_saveath(struct ieee80211_node *, uint8_t *); 76 void ieee80211_recv_mgmt(struct ieee80211com *, struct mbuf *, 77 struct ieee80211_node *, int, int, int, uint32_t); 78 int ieee80211_mgmt_output(struct ieee80211com *, struct ieee80211_node *, 79 struct mbuf *, int type); 80 struct ieee80211_bpf_params; 81 int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *, 82 const struct ieee80211_bpf_params *); 83 int ieee80211_output(struct ifnet *, struct mbuf *, 84 struct sockaddr *, struct rtentry *); 85 int ieee80211_send_nulldata(struct ieee80211_node *); 86 int ieee80211_send_mgmt(struct ieee80211com *, struct ieee80211_node *, 87 int, int); 88 int ieee80211_send_probereq(struct ieee80211_node *ni, 89 const uint8_t sa[IEEE80211_ADDR_LEN], 90 const uint8_t da[IEEE80211_ADDR_LEN], 91 const uint8_t bssid[IEEE80211_ADDR_LEN], 92 const uint8_t *ssid, size_t ssidlen, 93 const void *optie, size_t optielen); 94 int ieee80211_classify(struct ieee80211com *, struct mbuf *, 95 struct ieee80211_node *); 96 struct mbuf *ieee80211_encap(struct ieee80211com *, struct mbuf *, 97 struct ieee80211_node *); 98 99 void ieee80211_reset_erp(struct ieee80211com *); 100 void ieee80211_set_shortslottime(struct ieee80211com *, int onoff); 101 int ieee80211_iserp_rateset(struct ieee80211com *, 102 struct ieee80211_rateset *); 103 void ieee80211_set11gbasicrates(struct ieee80211_rateset *, 104 enum ieee80211_phymode); 105 106 /* 107 * Return the size of the 802.11 header for a management or data frame. 108 */ 109 static __inline int 110 ieee80211_hdrsize(const void *data) 111 { 112 const struct ieee80211_frame *wh = data; 113 int size = sizeof(struct ieee80211_frame); 114 115 /* NB: we don't handle control frames */ 116 KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL, 117 ("%s: control frame", __func__)); 118 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) 119 size += IEEE80211_ADDR_LEN; 120 if (IEEE80211_QOS_HAS_SEQ(wh)) 121 size += sizeof(uint16_t); 122 return size; 123 } 124 125 /* 126 * Like ieee80211_hdrsize, but handles any type of frame. 127 */ 128 static __inline int 129 ieee80211_anyhdrsize(const void *data) 130 { 131 const struct ieee80211_frame *wh = data; 132 133 if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) { 134 switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { 135 case IEEE80211_FC0_SUBTYPE_CTS: 136 case IEEE80211_FC0_SUBTYPE_ACK: 137 return sizeof(struct ieee80211_frame_ack); 138 case IEEE80211_FC0_SUBTYPE_BAR: 139 return sizeof(struct ieee80211_frame_bar); 140 } 141 return sizeof(struct ieee80211_frame_min); 142 } else 143 return ieee80211_hdrsize(data); 144 } 145 146 /* 147 * Template for an in-kernel authenticator. Authenticators 148 * register with the protocol code and are typically loaded 149 * as separate modules as needed. 150 */ 151 struct ieee80211_authenticator { 152 const char *ia_name; /* printable name */ 153 int (*ia_attach)(struct ieee80211com *); 154 void (*ia_detach)(struct ieee80211com *); 155 void (*ia_node_join)(struct ieee80211com *, 156 struct ieee80211_node *); 157 void (*ia_node_leave)(struct ieee80211com *, 158 struct ieee80211_node *); 159 }; 160 void ieee80211_authenticator_register(int type, 161 const struct ieee80211_authenticator *); 162 void ieee80211_authenticator_unregister(int type); 163 const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth); 164 165 struct ieee80211req; 166 /* 167 * Template for an MAC ACL policy module. Such modules 168 * register with the protocol code and are passed the sender's 169 * address of each received frame for validation. 170 */ 171 struct ieee80211_aclator { 172 const char *iac_name; /* printable name */ 173 int (*iac_attach)(struct ieee80211com *); 174 void (*iac_detach)(struct ieee80211com *); 175 int (*iac_check)(struct ieee80211com *, 176 const uint8_t mac[IEEE80211_ADDR_LEN]); 177 int (*iac_add)(struct ieee80211com *, 178 const uint8_t mac[IEEE80211_ADDR_LEN]); 179 int (*iac_remove)(struct ieee80211com *, 180 const uint8_t mac[IEEE80211_ADDR_LEN]); 181 int (*iac_flush)(struct ieee80211com *); 182 int (*iac_setpolicy)(struct ieee80211com *, int); 183 int (*iac_getpolicy)(struct ieee80211com *); 184 int (*iac_setioctl)(struct ieee80211com *, struct ieee80211req *); 185 int (*iac_getioctl)(struct ieee80211com *, struct ieee80211req *); 186 }; 187 void ieee80211_aclator_register(const struct ieee80211_aclator *); 188 void ieee80211_aclator_unregister(const struct ieee80211_aclator *); 189 const struct ieee80211_aclator *ieee80211_aclator_get(const char *name); 190 191 /* flags for ieee80211_fix_rate() */ 192 #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */ 193 #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed rate */ 194 #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */ 195 #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */ 196 #define IEEE80211_F_DOBRS 0x00000010 /* check basic rate set */ 197 #define IEEE80211_F_JOIN 0x00000020 /* sta joining our bss */ 198 int ieee80211_fix_rate(struct ieee80211_node *, 199 struct ieee80211_rateset *, int); 200 201 /* 202 * WME/WMM support. 203 */ 204 struct wmeParams { 205 uint8_t wmep_acm; 206 uint8_t wmep_aifsn; 207 uint8_t wmep_logcwmin; /* log2(cwmin) */ 208 uint8_t wmep_logcwmax; /* log2(cwmax) */ 209 uint8_t wmep_txopLimit; 210 uint8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */ 211 }; 212 #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5) 213 #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5) 214 215 struct chanAccParams { 216 uint8_t cap_info; /* version of the current set */ 217 struct wmeParams cap_wmeParams[WME_NUM_AC]; 218 }; 219 220 struct ieee80211_wme_state { 221 u_int wme_flags; 222 #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */ 223 u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */ 224 u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */ 225 u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */ 226 227 struct wmeParams wme_params[4]; /* from assoc resp for each AC*/ 228 struct chanAccParams wme_wmeChanParams; /* WME params applied to self */ 229 struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */ 230 struct chanAccParams wme_chanParams; /* params applied to self */ 231 struct chanAccParams wme_bssChanParams; /* params bcast to stations */ 232 233 int (*wme_update)(struct ieee80211com *); 234 }; 235 236 void ieee80211_wme_initparams(struct ieee80211com *); 237 void ieee80211_wme_updateparams(struct ieee80211com *); 238 void ieee80211_wme_updateparams_locked(struct ieee80211com *); 239 240 #define ieee80211_new_state(_ic, _nstate, _arg) \ 241 (((_ic)->ic_newstate)((_ic), (_nstate), (_arg))) 242 int ieee80211_init(struct ieee80211com *, int forcescan); 243 void ieee80211_dturbo_switch(struct ieee80211com *, int newflags); 244 void ieee80211_beacon_miss(struct ieee80211com *); 245 void ieee80211_print_essid(const uint8_t *, int); 246 void ieee80211_dump_pkt(struct ieee80211com *, 247 const uint8_t *, int, int, int); 248 249 extern const char *ieee80211_opmode_name[]; 250 extern const char *ieee80211_state_name[IEEE80211_S_MAX]; 251 extern const char *ieee80211_wme_acnames[]; 252 253 /* 254 * Beacon frames constructed by ieee80211_beacon_alloc 255 * have the following structure filled in so drivers 256 * can update the frame later w/ minimal overhead. 257 */ 258 struct ieee80211_beacon_offsets { 259 uint8_t bo_flags[4]; /* update/state flags */ 260 uint16_t *bo_caps; /* capabilities */ 261 uint8_t *bo_cfp; /* start of CFParms element */ 262 uint8_t *bo_tim; /* start of atim/dtim */ 263 uint8_t *bo_wme; /* start of WME parameters */ 264 uint8_t *bo_tim_trailer;/* start of fixed-size trailer */ 265 uint16_t bo_tim_len; /* atim/dtim length in bytes */ 266 uint16_t bo_tim_trailer_len;/* tim trailer length in bytes */ 267 uint8_t *bo_erp; /* start of ERP element */ 268 uint8_t *bo_htinfo; /* start of HT info element */ 269 uint8_t *bo_appie; /* start of AppIE element */ 270 uint16_t bo_appie_len; /* AppIE length in bytes */ 271 uint16_t bo_csa_trailer_len;; 272 uint8_t *bo_csa; /* start of CSA element */ 273 }; 274 struct mbuf *ieee80211_beacon_alloc(struct ieee80211_node *, 275 struct ieee80211_beacon_offsets *); 276 277 /* 278 * Beacon frame updates are signaled through calls to ic_update_beacon 279 * with one of the IEEE80211_BEACON_* tokens defined below. For devices 280 * that construct beacon frames on the host this can trigger a rebuild 281 * or defer the processing. For devices that offload beacon frame 282 * handling this callback can be used to signal a rebuild. The bo_flags 283 * array in the ieee80211_beacon_offsets structure is intended to record 284 * deferred processing requirements; ieee80211_beacon_update uses the 285 * state to optimize work. Since this structure is owned by the driver 286 * and not visible to the 802.11 layer drivers must supply an ic_update_beacon 287 * callback that marks the flag bits and schedules (as necessary) an update. 288 */ 289 enum { 290 IEEE80211_BEACON_CAPS = 0, /* capabilities */ 291 IEEE80211_BEACON_TIM = 1, /* DTIM/ATIM */ 292 IEEE80211_BEACON_WME = 2, 293 IEEE80211_BEACON_ERP = 3, /* Extended Rate Phy */ 294 IEEE80211_BEACON_HTINFO = 4, /* HT Information */ 295 IEEE80211_BEACON_APPIE = 5, /* Application IE's */ 296 IEEE80211_BEACON_CFP = 6, /* CFParms */ 297 IEEE80211_BEACON_CSA = 7, /* Channel Switch Announcement */ 298 }; 299 int ieee80211_beacon_update(struct ieee80211_node *, 300 struct ieee80211_beacon_offsets *, struct mbuf *, int mcast); 301 302 /* 303 * Notification methods called from the 802.11 state machine. 304 * Note that while these are defined here, their implementation 305 * is OS-specific. 306 */ 307 void ieee80211_notify_node_join(struct ieee80211com *, 308 struct ieee80211_node *, int newassoc); 309 void ieee80211_notify_node_leave(struct ieee80211com *, 310 struct ieee80211_node *); 311 void ieee80211_notify_scan_done(struct ieee80211com *); 312 #endif /* _NET80211_IEEE80211_PROTO_H_ */
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