1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2005 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 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 #ifndef _NET80211_IEEE80211_PROTO_H_ 35 #define _NET80211_IEEE80211_PROTO_H_ 36 37 /* 38 * 802.11 protocol implementation definitions. 39 */ 40 41 enum ieee80211_state { 42 IEEE80211_S_INIT = 0, /* default state */ 43 IEEE80211_S_SCAN = 1, /* scanning */ 44 IEEE80211_S_AUTH = 2, /* try to authenticate */ 45 IEEE80211_S_ASSOC = 3, /* try to assoc */ 46 IEEE80211_S_RUN = 4, /* associated */ 47 }; 48 #define IEEE80211_S_MAX (IEEE80211_S_RUN+1) 49 50 #define IEEE80211_SEND_MGMT(_ic,_ni,_type,_arg) \ 51 ((*(_ic)->ic_send_mgmt)(_ic, _ni, _type, _arg)) 52 53 extern const char *ieee80211_mgt_subtype_name[]; 54 extern const char *ieee80211_phymode_name[]; 55 56 void ieee80211_proto_attach(struct ieee80211com *); 57 void ieee80211_proto_detach(struct ieee80211com *); 58 59 struct ieee80211_node; 60 int ieee80211_input(struct ieee80211com *, struct mbuf *, 61 struct ieee80211_node *, int, u_int32_t); 62 int ieee80211_setup_rates(struct ieee80211_node *ni, 63 const u_int8_t *rates, const u_int8_t *xrates, int flags); 64 void ieee80211_saveie(u_int8_t **, const u_int8_t *); 65 void ieee80211_recv_mgmt(struct ieee80211com *, struct mbuf *, 66 struct ieee80211_node *, int, int, u_int32_t); 67 struct ieee80211_bpf_params; 68 int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *, 69 const struct ieee80211_bpf_params *); 70 int ieee80211_output(struct ifnet *, struct mbuf *, 71 struct sockaddr *, struct rtentry *); 72 int ieee80211_send_nulldata(struct ieee80211_node *); 73 int ieee80211_send_probereq(struct ieee80211_node *ni, 74 const u_int8_t sa[IEEE80211_ADDR_LEN], 75 const u_int8_t da[IEEE80211_ADDR_LEN], 76 const u_int8_t bssid[IEEE80211_ADDR_LEN], 77 const u_int8_t *ssid, size_t ssidlen, 78 const void *optie, size_t optielen); 79 int ieee80211_send_mgmt(struct ieee80211com *, struct ieee80211_node *, 80 int, int); 81 int ieee80211_classify(struct ieee80211com *, struct mbuf *, 82 struct ieee80211_node *); 83 struct mbuf *ieee80211_encap(struct ieee80211com *, struct mbuf *, 84 struct ieee80211_node *); 85 void ieee80211_pwrsave(struct ieee80211com *, struct ieee80211_node *, 86 struct mbuf *); 87 88 void ieee80211_reset_erp(struct ieee80211com *); 89 void ieee80211_set_shortslottime(struct ieee80211com *, int onoff); 90 int ieee80211_iserp_rateset(struct ieee80211com *, 91 struct ieee80211_rateset *); 92 void ieee80211_set11gbasicrates(struct ieee80211_rateset *, 93 enum ieee80211_phymode); 94 95 /* 96 * Return the size of the 802.11 header for a management or data frame. 97 */ 98 static __inline int 99 ieee80211_hdrsize(const void *data) 100 { 101 const struct ieee80211_frame *wh = data; 102 int size = sizeof(struct ieee80211_frame); 103 104 /* NB: we don't handle control frames */ 105 KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL, 106 ("%s: control frame", __func__)); 107 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) 108 size += IEEE80211_ADDR_LEN; 109 if (IEEE80211_QOS_HAS_SEQ(wh)) 110 size += sizeof(u_int16_t); 111 return size; 112 } 113 114 /* 115 * Return the size of the 802.11 header; handles any type of frame. 116 */ 117 static __inline int 118 ieee80211_anyhdrsize(const void *data) 119 { 120 const struct ieee80211_frame *wh = data; 121 122 if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) { 123 switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { 124 case IEEE80211_FC0_SUBTYPE_CTS: 125 case IEEE80211_FC0_SUBTYPE_ACK: 126 return sizeof(struct ieee80211_frame_ack); 127 } 128 return sizeof(struct ieee80211_frame_min); 129 } else 130 return ieee80211_hdrsize(data); 131 } 132 133 /* 134 * Template for an in-kernel authenticator. Authenticators 135 * register with the protocol code and are typically loaded 136 * as separate modules as needed. 137 */ 138 struct ieee80211_authenticator { 139 const char *ia_name; /* printable name */ 140 int (*ia_attach)(struct ieee80211com *); 141 void (*ia_detach)(struct ieee80211com *); 142 void (*ia_node_join)(struct ieee80211com *, 143 struct ieee80211_node *); 144 void (*ia_node_leave)(struct ieee80211com *, 145 struct ieee80211_node *); 146 }; 147 void ieee80211_authenticator_register(int type, 148 const struct ieee80211_authenticator *); 149 void ieee80211_authenticator_unregister(int type); 150 const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth); 151 152 struct ieee80211req; 153 /* 154 * Template for an MAC ACL policy module. Such modules 155 * register with the protocol code and are passed the sender's 156 * address of each received frame for validation. 157 */ 158 struct ieee80211_aclator { 159 const char *iac_name; /* printable name */ 160 int (*iac_attach)(struct ieee80211com *); 161 void (*iac_detach)(struct ieee80211com *); 162 int (*iac_check)(struct ieee80211com *, 163 const u_int8_t mac[IEEE80211_ADDR_LEN]); 164 int (*iac_add)(struct ieee80211com *, 165 const u_int8_t mac[IEEE80211_ADDR_LEN]); 166 int (*iac_remove)(struct ieee80211com *, 167 const u_int8_t mac[IEEE80211_ADDR_LEN]); 168 int (*iac_flush)(struct ieee80211com *); 169 int (*iac_setpolicy)(struct ieee80211com *, int); 170 int (*iac_getpolicy)(struct ieee80211com *); 171 int (*iac_setioctl)(struct ieee80211com *, struct ieee80211req *); 172 int (*iac_getioctl)(struct ieee80211com *, struct ieee80211req *); 173 }; 174 void ieee80211_aclator_register(const struct ieee80211_aclator *); 175 void ieee80211_aclator_unregister(const struct ieee80211_aclator *); 176 const struct ieee80211_aclator *ieee80211_aclator_get(const char *name); 177 178 /* flags for ieee80211_fix_rate() */ 179 #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */ 180 #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed rate */ 181 #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */ 182 #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */ 183 #define IEEE80211_F_JOIN 0x00000010 /* sta joining our bss */ 184 int ieee80211_fix_rate(struct ieee80211_node *, int); 185 186 /* 187 * WME/WMM support. 188 */ 189 struct wmeParams { 190 u_int8_t wmep_acm; 191 u_int8_t wmep_aifsn; 192 u_int8_t wmep_logcwmin; /* log2(cwmin) */ 193 u_int8_t wmep_logcwmax; /* log2(cwmax) */ 194 u_int8_t wmep_txopLimit; 195 u_int8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */ 196 }; 197 #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5) 198 #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5) 199 200 struct chanAccParams { 201 u_int8_t cap_info; /* version of the current set */ 202 struct wmeParams cap_wmeParams[WME_NUM_AC]; 203 }; 204 205 struct ieee80211_wme_state { 206 u_int wme_flags; 207 #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */ 208 u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */ 209 u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */ 210 u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */ 211 212 struct wmeParams wme_params[4]; /* from assoc resp for each AC*/ 213 struct chanAccParams wme_wmeChanParams; /* WME params applied to self */ 214 struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */ 215 struct chanAccParams wme_chanParams; /* params applied to self */ 216 struct chanAccParams wme_bssChanParams; /* params bcast to stations */ 217 218 int (*wme_update)(struct ieee80211com *); 219 }; 220 221 void ieee80211_wme_initparams(struct ieee80211com *); 222 void ieee80211_wme_updateparams(struct ieee80211com *); 223 void ieee80211_wme_updateparams_locked(struct ieee80211com *); 224 225 #define ieee80211_new_state(_ic, _nstate, _arg) \ 226 (((_ic)->ic_newstate)((_ic), (_nstate), (_arg))) 227 void ieee80211_beacon_miss(struct ieee80211com *); 228 void ieee80211_print_essid(const u_int8_t *, int); 229 void ieee80211_dump_pkt(const u_int8_t *, int, int, int); 230 231 extern const char *ieee80211_opmode_name[]; 232 extern const char *ieee80211_state_name[IEEE80211_S_MAX]; 233 extern const char *ieee80211_wme_acnames[]; 234 235 /* 236 * Beacon frames constructed by ieee80211_beacon_alloc 237 * have the following structure filled in so drivers 238 * can update the frame later w/ minimal overhead. 239 */ 240 struct ieee80211_beacon_offsets { 241 u_int16_t *bo_caps; /* capabilities */ 242 u_int8_t *bo_tim; /* start of atim/dtim */ 243 u_int8_t *bo_wme; /* start of WME parameters */ 244 u_int8_t *bo_trailer; /* start of fixed-size trailer */ 245 u_int16_t bo_tim_len; /* atim/dtim length in bytes */ 246 u_int16_t bo_trailer_len; /* trailer length in bytes */ 247 u_int8_t *bo_erp; /* start of ERP element */ 248 }; 249 struct mbuf *ieee80211_beacon_alloc(struct ieee80211com *, 250 struct ieee80211_node *, struct ieee80211_beacon_offsets *); 251 int ieee80211_beacon_update(struct ieee80211com *, 252 struct ieee80211_node *, struct ieee80211_beacon_offsets *, 253 struct mbuf *, int broadcast); 254 255 /* 256 * Notification methods called from the 802.11 state machine. 257 * Note that while these are defined here, their implementation 258 * is OS-specific. 259 */ 260 void ieee80211_notify_node_join(struct ieee80211com *, 261 struct ieee80211_node *, int newassoc); 262 void ieee80211_notify_node_leave(struct ieee80211com *, 263 struct ieee80211_node *); 264 void ieee80211_notify_scan_done(struct ieee80211com *); 265 #endif /* _NET80211_IEEE80211_PROTO_H_ */ 266