The Design and Implementation of the FreeBSD Operating System, Second Edition
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 1.18 2011/02/21 23:50:08 jmcneill 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 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         IASSERT((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 int     ieee80211_fix_rate(struct ieee80211_node *, int);
  184 
  185 /*
  186  * WME/WMM support.
  187  */
  188 struct wmeParams {
  189         u_int8_t        wmep_acm;
  190         u_int8_t        wmep_aifsn;
  191         u_int8_t        wmep_logcwmin;          /* log2(cwmin) */
  192         u_int8_t        wmep_logcwmax;          /* log2(cwmax) */
  193         u_int8_t        wmep_txopLimit;
  194         u_int8_t        wmep_noackPolicy;       /* 0 (ack), 1 (no ack) */
  195 };
  196 #define IEEE80211_TXOP_TO_US(_txop)     ((_txop)<<5)
  197 #define IEEE80211_US_TO_TXOP(_us)       ((_us)>>5)
  198 
  199 struct chanAccParams {
  200         u_int8_t        cap_info;               /* version of the current set */
  201         struct wmeParams cap_wmeParams[WME_NUM_AC];
  202 };
  203 
  204 struct ieee80211_wme_state {
  205         u_int   wme_flags;
  206 #define WME_F_AGGRMODE  0x00000001      /* STATUS: WME agressive mode */
  207         u_int   wme_hipri_traffic;      /* VI/VO frames in beacon interval */
  208         u_int   wme_hipri_switch_thresh;/* agressive mode switch thresh */
  209         u_int   wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */
  210 
  211         struct wmeParams wme_params[4];         /* from assoc resp for each AC*/
  212         struct chanAccParams wme_wmeChanParams; /* WME params applied to self */
  213         struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */
  214         struct chanAccParams wme_chanParams;    /* params applied to self */
  215         struct chanAccParams wme_bssChanParams; /* params bcast to stations */
  216 
  217         int     (*wme_update)(struct ieee80211com *);
  218 };
  219 
  220 void    ieee80211_wme_initparams(struct ieee80211com *);
  221 void    ieee80211_wme_updateparams(struct ieee80211com *);
  222 void    ieee80211_wme_updateparams_locked(struct ieee80211com *);
  223 
  224 #define ieee80211_new_state(_ic, _nstate, _arg) \
  225         (((_ic)->ic_newstate)((_ic), (_nstate), (_arg)))
  226 extern  int ieee80211_compute_duration(const struct ieee80211_frame_min *,
  227                 const struct ieee80211_key *, int,
  228                 uint32_t, int, int, struct ieee80211_duration *,
  229                 struct ieee80211_duration *, int *, int);
  230 void    ieee80211_beacon_miss(struct ieee80211com *);
  231 void    ieee80211_print_essid(const u_int8_t *, int);
  232 void    ieee80211_dump_pkt(const u_int8_t *, int, int, int);
  233 
  234 extern  const char *ieee80211_state_name[IEEE80211_S_MAX];
  235 extern  const char *ieee80211_wme_acnames[];
  236 
  237 /*
  238  * Beacon frames constructed by ieee80211_beacon_alloc
  239  * have the following structure filled in so drivers
  240  * can update the frame later w/ minimal overhead.
  241  */
  242 struct ieee80211_beacon_offsets {
  243         u_int16_t       *bo_caps;       /* capabilities */
  244         u_int8_t        *bo_tim;        /* start of atim/dtim */
  245         u_int8_t        *bo_wme;        /* start of WME parameters */
  246         u_int8_t        *bo_trailer;    /* start of fixed-size trailer */
  247         u_int16_t       bo_tim_len;     /* atim/dtim length in bytes */
  248         u_int16_t       bo_trailer_len; /* trailer length in bytes */
  249 };
  250 struct mbuf *ieee80211_beacon_alloc(struct ieee80211com *,
  251                 struct ieee80211_node *, struct ieee80211_beacon_offsets *);
  252 int     ieee80211_beacon_update(struct ieee80211com *,
  253                 struct ieee80211_node *, struct ieee80211_beacon_offsets *,
  254                 struct mbuf *, int broadcast);
  255 
  256 /*
  257  * Notification methods called from the 802.11 state machine.
  258  * Note that while these are defined here, their implementation
  259  * is OS-specific.
  260  */
  261 void    ieee80211_notify_node_join(struct ieee80211com *,
  262                 struct ieee80211_node *, int newassoc);
  263 void    ieee80211_notify_node_leave(struct ieee80211com *,
  264                 struct ieee80211_node *);
  265 void    ieee80211_notify_scan_done(struct ieee80211com *);
  266 #endif /* !_NET80211_IEEE80211_PROTO_H_ */

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