sys/netproto/802_11/ieee80211_mesh.h

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD$
  30  */
  31 #ifndef _NET80211_IEEE80211_MESH_H_
  32 #define _NET80211_IEEE80211_MESH_H_
  33
  34 #define IEEE80211_MESH_DEFAULT_TTL      31
  35 #define IEEE80211_MESH_MAX_NEIGHBORS    15
  36
  37 /*
  38  * NB: all structures are __packed  so sizeof works on arm, et. al.
  39  */
  40 /*
  41  * 802.11s Information Elements.
  42 */
  43 /* Mesh Configuration */
  44 #define IEEE80211_MESH_CONF_SZ          (7)
  45 struct ieee80211_meshconf_ie {
  46         uint8_t         conf_ie;        /* IEEE80211_ELEMID_MESHCONF */
  47         uint8_t         conf_len;
  48         uint8_t         conf_pselid;    /* Active Path Sel. Proto. ID */
  49         uint8_t         conf_pmetid;    /* Active Metric Identifier */
  50         uint8_t         conf_ccid;      /* Congestion Control Mode ID  */
  51         uint8_t         conf_syncid;    /* Sync. Protocol ID */
  52         uint8_t         conf_authid;    /* Auth. Protocol ID */
  53         uint8_t         conf_form;      /* Formation Information */
  54         uint8_t         conf_cap;
  55 } __packed;
  56
  57 /* Hybrid Wireless Mesh Protocol */
  58 enum {
  59         /* 0 reserved */
  60         IEEE80211_MESHCONF_PATH_HWMP            = 1,
  61         /* 2-254 reserved */
  62         IEEE80211_MESHCONF_PATH_VENDOR          = 255,
  63 };
  64
  65 /* Airtime Link Metric */
  66 enum {
  67         /* 0 reserved */
  68         IEEE80211_MESHCONF_METRIC_AIRTIME       = 1,
  69         /* 2-254 reserved */
  70         IEEE80211_MESHCONF_METRIC_VENDOR        = 255,
  71 };
  72
  73 /* Congestion Control */
  74 enum {
  75         IEEE80211_MESHCONF_CC_DISABLED          = 0,
  76         IEEE80211_MESHCONF_CC_SIG               = 1,
  77         /* 2-254 reserved */
  78         IEEE80211_MESHCONF_CC_VENDOR            = 255,
  79 };
  80
  81 /* Neighbour Offset */
  82 enum {
  83         /* 0 reserved */
  84         IEEE80211_MESHCONF_SYNC_NEIGHOFF        = 1,
  85         /* 2-254 rserved */
  86         IEEE80211_MESHCONF_SYNC_VENDOR          = 255,
  87 };
  88
  89 /* Authentication Protocol Identifier */
  90 enum {
  91
  92         IEEE80211_MESHCONF_AUTH_DISABLED        = 0,
  93         /* Simultaneous Authenticaction of Equals */
  94         IEEE80211_MESHCONF_AUTH_SEA             = 1,
  95         IEEE80211_MESHCONF_AUTH_8021X           = 2, /* IEEE 802.1X */
  96         /* 3-254 reserved */
  97         IEEE80211_MESHCONF_AUTH_VENDOR          = 255,
  98 };
  99
 100 /* Mesh Formation Info */
 101 #define IEEE80211_MESHCONF_FORM_GATE    0x01    /* Connected to Gate */
 102 #define IEEE80211_MESHCONF_FORM_NNEIGH_MASK 0x7E /* Number of Neighbours */
 103 #define IEEE80211_MESHCONF_FORM_SA      0xF0    /* indicating 802.1X auth */
 104
 105 /* Mesh Capability */
 106 #define IEEE80211_MESHCONF_CAP_AP       0x01    /* Accepting Peers */
 107 #define IEEE80211_MESHCONF_CAP_MCCAS    0x02    /* MCCA supported */
 108 #define IEEE80211_MESHCONF_CAP_MCCAE    0x04    /* MCCA enabled */
 109 #define IEEE80211_MESHCONF_CAP_FWRD     0x08    /* forwarding enabled */
 110 #define IEEE80211_MESHCONF_CAP_BTR      0x10    /* Beacon Timing Report Enab */
 111 #define IEEE80211_MESHCONF_CAP_TBTT     0x20    /* TBTT Adjusting  */
 112 #define IEEE80211_MESHCONF_CAP_PSL      0x40    /* Power Save Level */
 113 /* 0x80 reserved */
 114
 115 /* Mesh Identifier */
 116 struct ieee80211_meshid_ie {
 117         uint8_t         id_ie;          /* IEEE80211_ELEMID_MESHID */
 118         uint8_t         id_len;
 119 } __packed;
 120
 121 /* Link Metric Report */
 122 struct ieee80211_meshlmetric_ie {
 123         uint8_t         lm_ie;  /* IEEE80211_ACTION_MESH_LMETRIC */
 124         uint8_t         lm_len;
 125         uint8_t         lm_flags;
 126 #define IEEE80211_MESH_LMETRIC_FLAGS_REQ        0x01    /* Request */
 127         /*
 128          * XXX: this field should be variable in size and depend on
 129          * the active active path selection metric identifier
 130          */
 131         uint32_t        lm_metric;
 132 #define IEEE80211_MESHLMETRIC_INITIALVAL        0
 133 } __packed;
 134
 135 /* Congestion Notification */
 136 struct ieee80211_meshcngst_ie {
 137         uint8_t         cngst_ie;       /* IEEE80211_ELEMID_MESHCNGST */
 138         uint8_t         cngst_len;
 139         uint16_t        cngst_timer[4]; /* Expiration Timers: AC_BK,
 140                                            AC_BE, AC_VI, AC_VO */
 141 } __packed;
 142
 143 /* Peer Link Management */
 144 #define IEEE80211_MPM_BASE_SZ   (4)
 145 #define IEEE80211_MPM_MAX_SZ    (8)
 146 struct ieee80211_meshpeer_ie {
 147         uint8_t         peer_ie;        /* IEEE80211_ELEMID_MESHPEER */
 148         uint8_t         peer_len;
 149         uint16_t        peer_proto;     /* Peer Management Protocol */
 150         uint16_t        peer_llinkid;   /* Local Link ID */
 151         uint16_t        peer_linkid;    /* Peer Link ID */
 152         uint16_t        peer_rcode;
 153 } __packed;
 154
 155 /* Mesh Peering Protocol Identifier field value */
 156 enum {
 157         IEEE80211_MPPID_MPM             = 0,    /* Mesh peering management */
 158         IEEE80211_MPPID_AUTH_MPM        = 1,    /* Auth. mesh peering exchange */
 159         /* 2-65535 reserved */
 160 };
 161
 162 #ifdef notyet
 163 /* Mesh Channel Switch Annoucement */
 164 struct ieee80211_meshcsa_ie {
 165         uint8_t         csa_ie;         /* IEEE80211_ELEMID_MESHCSA */
 166         uint8_t         csa_len;
 167         uint8_t         csa_mode;
 168         uint8_t         csa_newclass;   /* New Regulatory Class */
 169         uint8_t         csa_newchan;
 170         uint8_t         csa_precvalue;  /* Precedence Value */
 171         uint8_t         csa_count;
 172 } __packed;
 173
 174 /* Mesh TIM */
 175 /* Equal to the non Mesh version */
 176
 177 /* Mesh Awake Window */
 178 struct ieee80211_meshawakew_ie {
 179         uint8_t         awakew_ie;              /* IEEE80211_ELEMID_MESHAWAKEW */
 180         uint8_t         awakew_len;
 181         uint8_t         awakew_windowlen;       /* in TUs */
 182 } __packed;
 183
 184 /* Mesh Beacon Timing */
 185 struct ieee80211_meshbeacont_ie {
 186         uint8_t         beacont_ie;             /* IEEE80211_ELEMID_MESHBEACONT */
 187         uint8_t         beacont_len;
 188         struct {
 189                 uint8_t         mp_aid;         /* Least Octet of AID */
 190                 uint16_t        mp_btime;       /* Beacon Time */
 191                 uint16_t        mp_bint;        /* Beacon Interval */
 192         } __packed mp[1];                       /* NB: variable size */
 193 } __packed;
 194 #endif
 195
 196 /* Gate (GANN) Annoucement */
 197 /*
 198  * NB: these macros used for the length in the IEs does not include 2 bytes
 199  * for _ie and _len fields as is defined by the standard.
 200  */
 201 #define IEEE80211_MESHGANN_BASE_SZ      (15)
 202 struct ieee80211_meshgann_ie {
 203         uint8_t         gann_ie;                /* IEEE80211_ELEMID_MESHGANN */
 204         uint8_t         gann_len;
 205         uint8_t         gann_flags;
 206         uint8_t         gann_hopcount;
 207         uint8_t         gann_ttl;
 208         uint8_t         gann_addr[IEEE80211_ADDR_LEN];
 209         uint32_t        gann_seq;               /* GANN Sequence Number */
 210         uint16_t        gann_interval;          /* GANN Interval */
 211 } __packed;
 212
 213 /* Root (MP) Annoucement */
 214 #define IEEE80211_MESHRANN_BASE_SZ      (21)
 215 struct ieee80211_meshrann_ie {
 216         uint8_t         rann_ie;                /* IEEE80211_ELEMID_MESHRANN */
 217         uint8_t         rann_len;
 218         uint8_t         rann_flags;
 219 #define IEEE80211_MESHRANN_FLAGS_GATE   0x01    /* Mesh Gate */
 220         uint8_t         rann_hopcount;
 221         uint8_t         rann_ttl;
 222         uint8_t         rann_addr[IEEE80211_ADDR_LEN];
 223         uint32_t        rann_seq;               /* HWMP Sequence Number */
 224         uint32_t        rann_interval;
 225         uint32_t        rann_metric;
 226 } __packed;
 227
 228 /* Mesh Path Request */
 229 #define IEEE80211_MESHPREQ_BASE_SZ              (26)
 230 #define IEEE80211_MESHPREQ_BASE_SZ_AE           (32)
 231 #define IEEE80211_MESHPREQ_TRGT_SZ              (11)
 232 #define IEEE80211_MESHPREQ_TCNT_OFFSET          (27)
 233 #define IEEE80211_MESHPREQ_TCNT_OFFSET_AE       (33)
 234 struct ieee80211_meshpreq_ie {
 235         uint8_t         preq_ie;        /* IEEE80211_ELEMID_MESHPREQ */
 236         uint8_t         preq_len;
 237         uint8_t         preq_flags;
 238 #define IEEE80211_MESHPREQ_FLAGS_GATE   0x01    /* Mesh Gate */
 239 #define IEEE80211_MESHPREQ_FLAGS_AM     0x02    /* 0 = bcast / 1 = ucast */
 240 #define IEEE80211_MESHPREQ_FLAGS_PP     0x04    /* Proactive PREP */
 241 #define IEEE80211_MESHPREQ_FLAGS_AE     0x40    /* Address Extension */
 242         uint8_t         preq_hopcount;
 243         uint8_t         preq_ttl;
 244         uint32_t        preq_id;
 245         uint8_t         preq_origaddr[IEEE80211_ADDR_LEN];
 246         uint32_t        preq_origseq;   /* HWMP Sequence Number */
 247         /* NB: may have Originator External Address */
 248         uint8_t         preq_orig_ext_addr[IEEE80211_ADDR_LEN];
 249         uint32_t        preq_lifetime;
 250         uint32_t        preq_metric;
 251         uint8_t         preq_tcount;    /* target count */
 252         struct {
 253                 uint8_t         target_flags;
 254 #define IEEE80211_MESHPREQ_TFLAGS_TO    0x01    /* Target Only */
 255 #define IEEE80211_MESHPREQ_TFLAGS_USN   0x04    /* Unknown HWMP seq number */
 256                 uint8_t         target_addr[IEEE80211_ADDR_LEN];
 257                 uint32_t        target_seq;     /* HWMP Sequence Number */
 258         } __packed preq_targets[1];             /* NB: variable size */
 259 } __packed;
 260
 261 /* Mesh Path Reply */
 262 #define IEEE80211_MESHPREP_BASE_SZ      (31)
 263 #define IEEE80211_MESHPREP_BASE_SZ_AE   (37)
 264 struct ieee80211_meshprep_ie {
 265         uint8_t         prep_ie;        /* IEEE80211_ELEMID_MESHPREP */
 266         uint8_t         prep_len;
 267         uint8_t         prep_flags;
 268 #define IEEE80211_MESHPREP_FLAGS_AE     0x40    /* Address Extension */
 269         uint8_t         prep_hopcount;
 270         uint8_t         prep_ttl;
 271         uint8_t         prep_targetaddr[IEEE80211_ADDR_LEN];
 272         uint32_t        prep_targetseq;
 273         /* NB: May have Target External Address */
 274         uint8_t         prep_target_ext_addr[IEEE80211_ADDR_LEN];
 275         uint32_t        prep_lifetime;
 276         uint32_t        prep_metric;
 277         uint8_t         prep_origaddr[IEEE80211_ADDR_LEN];
 278         uint32_t        prep_origseq;   /* HWMP Sequence Number */
 279 } __packed;
 280
 281 /* Mesh Path Error */
 282 #define IEEE80211_MESHPERR_MAXDEST      (19)
 283 #define IEEE80211_MESHPERR_NDEST_OFFSET (3)
 284 #define IEEE80211_MESHPERR_BASE_SZ      (2)
 285 #define IEEE80211_MESHPERR_DEST_SZ      (13)
 286 #define IEEE80211_MESHPERR_DEST_SZ_AE   (19)
 287 struct ieee80211_meshperr_ie {
 288         uint8_t         perr_ie;        /* IEEE80211_ELEMID_MESHPERR */
 289         uint8_t         perr_len;
 290         uint8_t         perr_ttl;
 291         uint8_t         perr_ndests;    /* Number of Destinations */
 292         struct {
 293                 uint8_t         dest_flags;
 294 #define IEEE80211_MESHPERR_DFLAGS_USN   0x01    /* XXX: not part of standard */
 295 #define IEEE80211_MESHPERR_DFLAGS_RC    0x02    /* XXX: not part of standard */
 296 #define IEEE80211_MESHPERR_FLAGS_AE     0x40    /* Address Extension */
 297                 uint8_t         dest_addr[IEEE80211_ADDR_LEN];
 298                 uint32_t        dest_seq;       /* HWMP Sequence Number */
 299                 /* NB: May have Destination External Address */
 300                 uint8_t         dest_ext_addr[IEEE80211_ADDR_LEN];
 301                 uint16_t        dest_rcode;
 302         } __packed perr_dests[1];               /* NB: variable size */
 303 } __packed;
 304
 305 #ifdef notyet
 306 /* Mesh Proxy Update */
 307 struct ieee80211_meshpu_ie {
 308         uint8_t         pu_ie;          /* IEEE80211_ELEMID_MESHPU */
 309         uint8_t         pu_len;
 310         uint8_t         pu_flags;
 311 #define IEEE80211_MESHPU_FLAGS_MASK             0x1
 312 #define IEEE80211_MESHPU_FLAGS_DEL              0x0
 313 #define IEEE80211_MESHPU_FLAGS_ADD              0x1
 314         uint8_t         pu_seq;         /* PU Sequence Number */
 315         uint8_t         pu_addr[IEEE80211_ADDR_LEN];
 316         uint8_t         pu_naddr;       /* Number of Proxied Addresses */
 317         /* NB: proxied address follows */
 318 } __packed;
 319
 320 /* Mesh Proxy Update Confirmation */
 321 struct ieee80211_meshpuc_ie {
 322         uint8_t         puc_ie;         /* IEEE80211_ELEMID_MESHPUC */
 323         uint8_t         puc_len;
 324         uint8_t         puc_flags;
 325         uint8_t         puc_seq;        /* PU Sequence Number */
 326         uint8_t         puc_daddr[IEEE80211_ADDR_LEN];
 327 } __packed;
 328 #endif
 329
 330 /*
 331  * 802.11s Action Frames
 332  * XXX: these are wrong, and some of them should be
 333  * under MESH category while PROXY is under MULTIHOP category.
 334  */
 335 #define IEEE80211_ACTION_CAT_INTERWORK          15
 336 #define IEEE80211_ACTION_CAT_RESOURCE           16
 337 #define IEEE80211_ACTION_CAT_PROXY              17
 338
 339 /*
 340  * Mesh Peering Action codes.
 341  */
 342 enum {
 343         /* 0 reserved */
 344         IEEE80211_ACTION_MESHPEERING_OPEN       = 1,
 345         IEEE80211_ACTION_MESHPEERING_CONFIRM    = 2,
 346         IEEE80211_ACTION_MESHPEERING_CLOSE      = 3,
 347         /* 4-255 reserved */
 348 };
 349
 350 /*
 351  * Mesh Action code.
 352  */
 353 enum {
 354         IEEE80211_ACTION_MESH_LMETRIC   = 0,    /* Mesh Link Metric Report */
 355         IEEE80211_ACTION_MESH_HWMP      = 1,    /* HWMP Mesh Path Selection */
 356         IEEE80211_ACTION_MESH_GANN      = 2,    /* Gate Announcement */
 357         IEEE80211_ACTION_MESH_CC        = 3,    /* Congestion Control */
 358         IEEE80211_ACTION_MESH_MCCA_SREQ = 4,    /* MCCA Setup Request */
 359         IEEE80211_ACTION_MESH_MCCA_SREP = 5,    /* MCCA Setup Reply */
 360         IEEE80211_ACTION_MESH_MCCA_AREQ = 6,    /* MCCA Advertisement Req. */
 361         IEEE80211_ACTION_MESH_MCCA_ADVER =7,    /* MCCA Advertisement */
 362         IEEE80211_ACTION_MESH_MCCA_TRDOWN = 8,  /* MCCA Teardown */
 363         IEEE80211_ACTION_MESH_TBTT_REQ  = 9,    /* TBTT Adjustment Request */
 364         IEEE80211_ACTION_MESH_TBTT_RES  = 10,   /* TBTT Adjustment Response */
 365         /* 11-255 reserved */
 366 };
 367
 368 /*
 369  * Different mesh control structures based on the AE
 370  * (Address Extension) bits.
 371  */
 372 struct ieee80211_meshcntl {
 373         uint8_t         mc_flags;       /* Address Extension 00 */
 374         uint8_t         mc_ttl;         /* TTL */
 375         uint8_t         mc_seq[4];      /* Sequence No. */
 376         /* NB: more addresses may follow */
 377 } __packed;
 378
 379 struct ieee80211_meshcntl_ae01 {
 380         uint8_t         mc_flags;       /* Address Extension 01 */
 381         uint8_t         mc_ttl;         /* TTL */
 382         uint8_t         mc_seq[4];      /* Sequence No. */
 383         uint8_t         mc_addr4[IEEE80211_ADDR_LEN];
 384 } __packed;
 385
 386 struct ieee80211_meshcntl_ae10 {
 387         uint8_t         mc_flags;       /* Address Extension 10 */
 388         uint8_t         mc_ttl;         /* TTL */
 389         uint8_t         mc_seq[4];      /* Sequence No. */
 390         uint8_t         mc_addr5[IEEE80211_ADDR_LEN];
 391         uint8_t         mc_addr6[IEEE80211_ADDR_LEN];
 392 } __packed;
 393
 394 #define IEEE80211_MESH_AE_MASK          0x03
 395 enum {
 396         IEEE80211_MESH_AE_00            = 0,    /* MC has no AE subfield */
 397         IEEE80211_MESH_AE_01            = 1,    /* MC contain addr4 */
 398         IEEE80211_MESH_AE_10            = 2,    /* MC contain addr5 & addr6 */
 399         IEEE80211_MESH_AE_11            = 3,    /* RESERVED */
 400 };
 401
 402 #ifdef _KERNEL
 403 MALLOC_DECLARE(M_80211_MESH_PREQ);
 404 MALLOC_DECLARE(M_80211_MESH_PREP);
 405 MALLOC_DECLARE(M_80211_MESH_PERR);
 406
 407 MALLOC_DECLARE(M_80211_MESH_RT);
 408 MALLOC_DECLARE(M_80211_MESH_GT_RT);
 409 /*
 410  * Basic forwarding information:
 411  * o Destination MAC
 412  * o Next-hop MAC
 413  * o Precursor list (not implemented yet)
 414  * o Path timeout
 415  * The rest is part of the active Mesh path selection protocol.
 416  * XXX: to be moved out later.
 417  */
 418 struct ieee80211_mesh_route {
 419         TAILQ_ENTRY(ieee80211_mesh_route)       rt_next;
 420         struct ieee80211vap     *rt_vap;
 421         ieee80211_rte_lock_t    rt_lock;        /* fine grained route lock */
 422         struct callout          rt_discovery;   /* discovery timeout */
 423         int                     rt_updtime;     /* last update time */
 424         uint8_t                 rt_dest[IEEE80211_ADDR_LEN];
 425         uint8_t                 rt_mesh_gate[IEEE80211_ADDR_LEN]; /* meshDA */
 426         uint8_t                 rt_nexthop[IEEE80211_ADDR_LEN];
 427         uint32_t                rt_metric;      /* path metric */
 428         uint16_t                rt_nhops;       /* number of hops */
 429         uint16_t                rt_flags;
 430 #define IEEE80211_MESHRT_FLAGS_DISCOVER 0x01    /* path discovery */
 431 #define IEEE80211_MESHRT_FLAGS_VALID    0x02    /* path discovery complete */
 432 #define IEEE80211_MESHRT_FLAGS_PROXY    0x04    /* proxy entry */
 433 #define IEEE80211_MESHRT_FLAGS_GATE     0x08    /* mesh gate entry */
 434         uint32_t                rt_lifetime;    /* route timeout */
 435         uint32_t                rt_lastmseq;    /* last seq# seen dest */
 436         uint32_t                rt_ext_seq;     /* proxy seq number */
 437         void                    *rt_priv;       /* private data */
 438 };
 439 #define IEEE80211_MESH_ROUTE_PRIV(rt, cast)     ((cast *)rt->rt_priv)
 440
 441 /*
 442  * Stored information about known mesh gates.
 443  */
 444 struct ieee80211_mesh_gate_route {
 445         TAILQ_ENTRY(ieee80211_mesh_gate_route)  gr_next;
 446         uint8_t                         gr_addr[IEEE80211_ADDR_LEN];
 447         uint32_t                        gr_lastseq;
 448         struct ieee80211_mesh_route     *gr_route;
 449 };
 450
 451 #define IEEE80211_MESH_PROTO_DSZ        12      /* description size */
 452 /*
 453  * Mesh Path Selection Protocol.
 454  */
 455 enum ieee80211_state;
 456 struct ieee80211_mesh_proto_path {
 457         uint8_t         mpp_active;
 458         char            mpp_descr[IEEE80211_MESH_PROTO_DSZ];
 459         uint8_t         mpp_ie;
 460         struct ieee80211_node *
 461                         (*mpp_discover)(struct ieee80211vap *,
 462                                 const uint8_t [IEEE80211_ADDR_LEN],
 463                                 struct mbuf *);
 464         void            (*mpp_peerdown)(struct ieee80211_node *);
 465         void            (*mpp_senderror)(struct ieee80211vap *,
 466                                 const uint8_t [IEEE80211_ADDR_LEN],
 467                                 struct ieee80211_mesh_route *, int);
 468         void            (*mpp_vattach)(struct ieee80211vap *);
 469         void            (*mpp_vdetach)(struct ieee80211vap *);
 470         int             (*mpp_newstate)(struct ieee80211vap *,
 471                             enum ieee80211_state, int);
 472         const size_t    mpp_privlen;    /* size required in the routing table
 473                                            for private data */
 474         int             mpp_inact;      /* inact. timeout for invalid routes
 475                                            (ticks) */
 476 };
 477
 478 /*
 479  * Mesh Link Metric Report Protocol.
 480  */
 481 struct ieee80211_mesh_proto_metric {
 482         uint8_t         mpm_active;
 483         char            mpm_descr[IEEE80211_MESH_PROTO_DSZ];
 484         uint8_t         mpm_ie;
 485         uint32_t        (*mpm_metric)(struct ieee80211_node *);
 486 };
 487
 488 #ifdef notyet
 489 /*
 490  * Mesh Authentication Protocol.
 491  */
 492 struct ieee80211_mesh_proto_auth {
 493         uint8_t         mpa_ie[4];
 494 };
 495
 496 struct ieee80211_mesh_proto_congestion {
 497 };
 498
 499 struct ieee80211_mesh_proto_sync {
 500 };
 501 #endif
 502
 503 typedef uint32_t ieee80211_mesh_seq;
 504 #define IEEE80211_MESH_SEQ_LEQ(a, b)    ((int32_t)((a)-(b)) <= 0)
 505 #define IEEE80211_MESH_SEQ_GEQ(a, b)    ((int32_t)((a)-(b)) >= 0)
 506
 507 struct ieee80211_mesh_state {
 508         int                             ms_idlen;
 509         uint8_t                         ms_id[IEEE80211_MESHID_LEN];
 510         ieee80211_mesh_seq              ms_seq; /* seq no for meshcntl */
 511         uint16_t                        ms_neighbors;
 512         uint8_t                         ms_ttl; /* mesh ttl set in packets */
 513 #define IEEE80211_MESHFLAGS_AP          0x01    /* accept peers */
 514 #define IEEE80211_MESHFLAGS_GATE        0x02    /* mesh gate role */
 515 #define IEEE80211_MESHFLAGS_FWD         0x04    /* forward packets */
 516 #define IEEE80211_MESHFLAGS_ROOT        0x08    /* configured as root */
 517         uint8_t                         ms_flags;
 518         ieee80211_rt_lock_t             ms_rt_lock;
 519         struct callout                  ms_cleantimer;
 520         struct callout                  ms_gatetimer;
 521         ieee80211_mesh_seq              ms_gateseq;
 522         TAILQ_HEAD(, ieee80211_mesh_gate_route) ms_known_gates;
 523         TAILQ_HEAD(, ieee80211_mesh_route)  ms_routes;
 524         struct ieee80211_mesh_proto_metric *ms_pmetric;
 525         struct ieee80211_mesh_proto_path   *ms_ppath;
 526 };
 527 void            ieee80211_mesh_attach(struct ieee80211com *);
 528 void            ieee80211_mesh_detach(struct ieee80211com *);
 529
 530 struct ieee80211_mesh_route *
 531                 ieee80211_mesh_rt_find(struct ieee80211vap *,
 532                     const uint8_t [IEEE80211_ADDR_LEN]);
 533 struct ieee80211_mesh_route *
 534                 ieee80211_mesh_rt_add(struct ieee80211vap *,
 535                     const uint8_t [IEEE80211_ADDR_LEN]);
 536 void            ieee80211_mesh_rt_del(struct ieee80211vap *,
 537                     const uint8_t [IEEE80211_ADDR_LEN]);
 538 void            ieee80211_mesh_rt_flush(struct ieee80211vap *);
 539 void            ieee80211_mesh_rt_flush_peer(struct ieee80211vap *,
 540                     const uint8_t [IEEE80211_ADDR_LEN]);
 541 int             ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int);
 542 void            ieee80211_mesh_proxy_check(struct ieee80211vap *,
 543                     const uint8_t [IEEE80211_ADDR_LEN]);
 544
 545 int             ieee80211_mesh_register_proto_path(const
 546                     struct ieee80211_mesh_proto_path *);
 547 int             ieee80211_mesh_register_proto_metric(const
 548                     struct ieee80211_mesh_proto_metric *);
 549
 550 uint8_t *       ieee80211_add_meshid(uint8_t *, struct ieee80211vap *);
 551 uint8_t *       ieee80211_add_meshconf(uint8_t *, struct ieee80211vap *);
 552 uint8_t *       ieee80211_add_meshpeer(uint8_t *, uint8_t, uint16_t, uint16_t,
 553                     uint16_t);
 554 uint8_t *       ieee80211_add_meshlmetric(uint8_t *, uint8_t, uint32_t);
 555 uint8_t *       ieee80211_add_meshgate(uint8_t *,
 556                     struct ieee80211_meshgann_ie *);
 557
 558 void            ieee80211_mesh_node_init(struct ieee80211vap *,
 559                     struct ieee80211_node *);
 560 void            ieee80211_mesh_node_cleanup(struct ieee80211_node *);
 561 void            ieee80211_parse_meshid(struct ieee80211_node *,
 562                     const uint8_t *);
 563 struct ieee80211_scanparams;
 564 void            ieee80211_mesh_init_neighbor(struct ieee80211_node *,
 565                    const struct ieee80211_frame *,
 566                    const struct ieee80211_scanparams *);
 567 void            ieee80211_mesh_update_beacon(struct ieee80211vap *,
 568                     struct ieee80211_beacon_offsets *);
 569 struct ieee80211_mesh_gate_route *
 570                 ieee80211_mesh_mark_gate(struct ieee80211vap *,
 571                     const uint8_t *, struct ieee80211_mesh_route *);
 572 void            ieee80211_mesh_forward_to_gates(struct ieee80211vap *,
 573                     struct ieee80211_mesh_route *);
 574 struct ieee80211_node *
 575                 ieee80211_mesh_find_txnode(struct ieee80211vap *,
 576                     const uint8_t [IEEE80211_ADDR_LEN]);
 577
 578 /*
 579  * Return non-zero if proxy operation is enabled.
 580  */
 581 static __inline int
 582 ieee80211_mesh_isproxyena(struct ieee80211vap *vap)
 583 {
 584         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 585         return (ms->ms_flags &
 586             (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_GATE)) != 0;
 587 }
 588
 589 /*
 590  * Process an outbound frame: if a path is known to the
 591  * destination then return a reference to the next hop
 592  * for immediate transmission.  Otherwise initiate path
 593  * discovery and, if possible queue the packet to be
 594  * sent when path discovery completes.
 595  */
 596 static __inline struct ieee80211_node *
 597 ieee80211_mesh_discover(struct ieee80211vap *vap,
 598     const uint8_t dest[IEEE80211_ADDR_LEN], struct mbuf *m)
 599 {
 600         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 601         return ms->ms_ppath->mpp_discover(vap, dest, m);
 602 }
 603
 604 #endif /* _KERNEL */
 605 #endif /* !_NET80211_IEEE80211_MESH_H_ */