sys/net/bridgestp.h

   1 /*      $NetBSD: if_bridgevar.h,v 1.4 2003/07/08 07:13:50 itojun Exp $  */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-4-Clause
   5  *
   6  * Copyright 2001 Wasabi Systems, Inc.
   7  * All rights reserved.
   8  *
   9  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed for the NetBSD Project by
  22  *      Wasabi Systems, Inc.
  23  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  24  *    or promote products derived from this software without specific prior
  25  *    written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGE.
  38  */
  39
  40 /*-
  41  * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
  42  * All rights reserved.
  43  *
  44  * Redistribution and use in source and binary forms, with or without
  45  * modification, are permitted provided that the following conditions
  46  * are met:
  47  * 1. Redistributions of source code must retain the above copyright
  48  *    notice, this list of conditions and the following disclaimer.
  49  * 2. Redistributions in binary form must reproduce the above copyright
  50  *    notice, this list of conditions and the following disclaimer in the
  51  *    documentation and/or other materials provided with the distribution.
  52  * 3. All advertising materials mentioning features or use of this software
  53  *    must display the following acknowledgement:
  54  *      This product includes software developed by Jason L. Wright
  55  * 4. The name of the author may not be used to endorse or promote products
  56  *    derived from this software without specific prior written permission.
  57  *
  58  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  59  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  60  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  61  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  62  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  63  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  64  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  66  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  67  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  68  * POSSIBILITY OF SUCH DAMAGE.
  69  *
  70  * OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
  71  */
  72
  73 /*
  74  * Data structure and control definitions for STP interfaces.
  75  */
  76
  77 #include <sys/callout.h>
  78 #include <sys/queue.h>
  79
  80 /* STP port states */
  81 #define BSTP_IFSTATE_DISABLED   0
  82 #define BSTP_IFSTATE_LISTENING  1
  83 #define BSTP_IFSTATE_LEARNING   2
  84 #define BSTP_IFSTATE_FORWARDING 3
  85 #define BSTP_IFSTATE_BLOCKING   4
  86 #define BSTP_IFSTATE_DISCARDING 5
  87
  88 #define BSTP_TCSTATE_ACTIVE     1
  89 #define BSTP_TCSTATE_DETECTED   2
  90 #define BSTP_TCSTATE_INACTIVE   3
  91 #define BSTP_TCSTATE_LEARNING   4
  92 #define BSTP_TCSTATE_PROPAG     5
  93 #define BSTP_TCSTATE_ACK        6
  94 #define BSTP_TCSTATE_TC         7
  95 #define BSTP_TCSTATE_TCN        8
  96
  97 #define BSTP_ROLE_DISABLED      0
  98 #define BSTP_ROLE_ROOT          1
  99 #define BSTP_ROLE_DESIGNATED    2
 100 #define BSTP_ROLE_ALTERNATE     3
 101 #define BSTP_ROLE_BACKUP        4
 102
 103 #ifdef _KERNEL
 104
 105 /* STP port flags */
 106 #define BSTP_PORT_CANMIGRATE    0x0001
 107 #define BSTP_PORT_NEWINFO       0x0002
 108 #define BSTP_PORT_DISPUTED      0x0004
 109 #define BSTP_PORT_ADMCOST       0x0008
 110 #define BSTP_PORT_AUTOEDGE      0x0010
 111 #define BSTP_PORT_AUTOPTP       0x0020
 112 #define BSTP_PORT_ADMEDGE       0x0040
 113 #define BSTP_PORT_PNDCOST       0x0080
 114
 115 /* BPDU priority */
 116 #define BSTP_PDU_SUPERIOR       1
 117 #define BSTP_PDU_REPEATED       2
 118 #define BSTP_PDU_INFERIOR       3
 119 #define BSTP_PDU_INFERIORALT    4
 120 #define BSTP_PDU_OTHER          5
 121
 122 /* BPDU flags */
 123 #define BSTP_PDU_PRMASK         0x0c            /* Port Role */
 124 #define BSTP_PDU_PRSHIFT        2               /* Port Role offset */
 125 #define BSTP_PDU_F_UNKN         0x00            /* Unknown port    (00) */
 126 #define BSTP_PDU_F_ALT          0x01            /* Alt/Backup port (01) */
 127 #define BSTP_PDU_F_ROOT         0x02            /* Root port       (10) */
 128 #define BSTP_PDU_F_DESG         0x03            /* Designated port (11) */
 129
 130 #define BSTP_PDU_STPMASK        0x81            /* strip unused STP flags */
 131 #define BSTP_PDU_RSTPMASK       0x7f            /* strip unused RSTP flags */
 132 #define BSTP_PDU_F_TC           0x01            /* Topology change */
 133 #define BSTP_PDU_F_P            0x02            /* Proposal flag */
 134 #define BSTP_PDU_F_L            0x10            /* Learning flag */
 135 #define BSTP_PDU_F_F            0x20            /* Forwarding flag */
 136 #define BSTP_PDU_F_A            0x40            /* Agreement flag */
 137 #define BSTP_PDU_F_TCA          0x80            /* Topology change ack */
 138
 139 /*
 140  * Spanning tree defaults.
 141  */
 142 #define BSTP_DEFAULT_MAX_AGE            (20 * 256)
 143 #define BSTP_DEFAULT_HELLO_TIME         (2 * 256)
 144 #define BSTP_DEFAULT_FORWARD_DELAY      (15 * 256)
 145 #define BSTP_DEFAULT_HOLD_TIME          (1 * 256)
 146 #define BSTP_DEFAULT_MIGRATE_DELAY      (3 * 256)
 147 #define BSTP_DEFAULT_HOLD_COUNT         6
 148 #define BSTP_DEFAULT_BRIDGE_PRIORITY    0x8000
 149 #define BSTP_DEFAULT_PORT_PRIORITY      0x80
 150 #define BSTP_DEFAULT_PATH_COST          55
 151 #define BSTP_MIN_HELLO_TIME             (1 * 256)
 152 #define BSTP_MIN_MAX_AGE                (6 * 256)
 153 #define BSTP_MIN_FORWARD_DELAY          (4 * 256)
 154 #define BSTP_MIN_HOLD_COUNT             1
 155 #define BSTP_MAX_HELLO_TIME             (2 * 256)
 156 #define BSTP_MAX_MAX_AGE                (40 * 256)
 157 #define BSTP_MAX_FORWARD_DELAY          (30 * 256)
 158 #define BSTP_MAX_HOLD_COUNT             10
 159 #define BSTP_MAX_PRIORITY               61440
 160 #define BSTP_MAX_PORT_PRIORITY          240
 161 #define BSTP_MAX_PATH_COST              200000000
 162
 163 /* BPDU message types */
 164 #define BSTP_MSGTYPE_CFG        0x00            /* Configuration */
 165 #define BSTP_MSGTYPE_RSTP       0x02            /* Rapid STP */
 166 #define BSTP_MSGTYPE_TCN        0x80            /* Topology chg notification */
 167
 168 /* Protocol versions */
 169 #define BSTP_PROTO_ID           0x00
 170 #define BSTP_PROTO_STP          0x00
 171 #define BSTP_PROTO_RSTP         0x02
 172 #define BSTP_PROTO_MAX          BSTP_PROTO_RSTP
 173
 174 #define BSTP_INFO_RECEIVED      1
 175 #define BSTP_INFO_MINE          2
 176 #define BSTP_INFO_AGED          3
 177 #define BSTP_INFO_DISABLED      4
 178
 179 #define BSTP_MESSAGE_AGE_INCR   (1 * 256)       /* in 256ths of a second */
 180 #define BSTP_TICK_VAL           (1 * 256)       /* in 256ths of a second */
 181 #define BSTP_LINK_TIMER         (BSTP_TICK_VAL * 15)
 182
 183 /*
 184  * Driver callbacks for STP state changes
 185  */
 186 typedef void (*bstp_state_cb_t)(struct ifnet *, int);
 187 typedef void (*bstp_rtage_cb_t)(struct ifnet *, int);
 188 struct bstp_cb_ops {
 189         bstp_state_cb_t bcb_state;
 190         bstp_rtage_cb_t bcb_rtage;
 191 };
 192
 193 /*
 194  * Because BPDU's do not make nicely aligned structures, two different
 195  * declarations are used: bstp_?bpdu (wire representation, packed) and
 196  * bstp_*_unit (internal, nicely aligned version).
 197  */
 198
 199 /* configuration bridge protocol data unit */
 200 struct bstp_cbpdu {
 201         uint8_t         cbu_dsap;               /* LLC: destination sap */
 202         uint8_t         cbu_ssap;               /* LLC: source sap */
 203         uint8_t         cbu_ctl;                /* LLC: control */
 204         uint16_t        cbu_protoid;            /* protocol id */
 205         uint8_t         cbu_protover;           /* protocol version */
 206         uint8_t         cbu_bpdutype;           /* message type */
 207         uint8_t         cbu_flags;              /* flags (below) */
 208
 209         /* root id */
 210         uint16_t        cbu_rootpri;            /* root priority */
 211         uint8_t         cbu_rootaddr[6];        /* root address */
 212
 213         uint32_t        cbu_rootpathcost;       /* root path cost */
 214
 215         /* bridge id */
 216         uint16_t        cbu_bridgepri;          /* bridge priority */
 217         uint8_t         cbu_bridgeaddr[6];      /* bridge address */
 218
 219         uint16_t        cbu_portid;             /* port id */
 220         uint16_t        cbu_messageage;         /* current message age */
 221         uint16_t        cbu_maxage;             /* maximum age */
 222         uint16_t        cbu_hellotime;          /* hello time */
 223         uint16_t        cbu_forwarddelay;       /* forwarding delay */
 224         uint8_t         cbu_versionlen;         /* version 1 length */
 225 } __packed;
 226 #define BSTP_BPDU_STP_LEN       (3 + 35)        /* LLC + STP pdu */
 227 #define BSTP_BPDU_RSTP_LEN      (3 + 36)        /* LLC + RSTP pdu */
 228
 229 /* topology change notification bridge protocol data unit */
 230 struct bstp_tbpdu {
 231         uint8_t         tbu_dsap;               /* LLC: destination sap */
 232         uint8_t         tbu_ssap;               /* LLC: source sap */
 233         uint8_t         tbu_ctl;                /* LLC: control */
 234         uint16_t        tbu_protoid;            /* protocol id */
 235         uint8_t         tbu_protover;           /* protocol version */
 236         uint8_t         tbu_bpdutype;           /* message type */
 237 } __packed;
 238
 239 /*
 240  * Timekeeping structure used in spanning tree code.
 241  */
 242 struct bstp_timer {
 243         int             active;
 244         int             latched;
 245         int             value;
 246 };
 247
 248 struct bstp_pri_vector {
 249         uint64_t                pv_root_id;
 250         uint32_t                pv_cost;
 251         uint64_t                pv_dbridge_id;
 252         uint16_t                pv_dport_id;
 253         uint16_t                pv_port_id;
 254 };
 255
 256 struct bstp_config_unit {
 257         struct bstp_pri_vector  cu_pv;
 258         uint16_t        cu_message_age;
 259         uint16_t        cu_max_age;
 260         uint16_t        cu_forward_delay;
 261         uint16_t        cu_hello_time;
 262         uint8_t         cu_message_type;
 263         uint8_t         cu_topology_change_ack;
 264         uint8_t         cu_topology_change;
 265         uint8_t         cu_proposal;
 266         uint8_t         cu_agree;
 267         uint8_t         cu_learning;
 268         uint8_t         cu_forwarding;
 269         uint8_t         cu_role;
 270 };
 271
 272 struct bstp_tcn_unit {
 273         uint8_t         tu_message_type;
 274 };
 275
 276 struct bstp_port {
 277         LIST_ENTRY(bstp_port)   bp_next;
 278         struct ifnet            *bp_ifp;        /* parent if */
 279         struct bstp_state       *bp_bs;
 280         uint8_t                 bp_active;
 281         uint8_t                 bp_protover;
 282         uint32_t                bp_flags;
 283         uint32_t                bp_path_cost;
 284         uint16_t                bp_port_msg_age;
 285         uint16_t                bp_port_max_age;
 286         uint16_t                bp_port_fdelay;
 287         uint16_t                bp_port_htime;
 288         uint16_t                bp_desg_msg_age;
 289         uint16_t                bp_desg_max_age;
 290         uint16_t                bp_desg_fdelay;
 291         uint16_t                bp_desg_htime;
 292         struct bstp_timer       bp_edge_delay_timer;
 293         struct bstp_timer       bp_forward_delay_timer;
 294         struct bstp_timer       bp_hello_timer;
 295         struct bstp_timer       bp_message_age_timer;
 296         struct bstp_timer       bp_migrate_delay_timer;
 297         struct bstp_timer       bp_recent_backup_timer;
 298         struct bstp_timer       bp_recent_root_timer;
 299         struct bstp_timer       bp_tc_timer;
 300         struct bstp_config_unit bp_msg_cu;
 301         struct bstp_pri_vector  bp_desg_pv;
 302         struct bstp_pri_vector  bp_port_pv;
 303         uint16_t                bp_port_id;
 304         uint8_t                 bp_state;
 305         uint8_t                 bp_tcstate;
 306         uint8_t                 bp_role;
 307         uint8_t                 bp_infois;
 308         uint8_t                 bp_tc_ack;
 309         uint8_t                 bp_tc_prop;
 310         uint8_t                 bp_fdbflush;
 311         uint8_t                 bp_priority;
 312         uint8_t                 bp_ptp_link;
 313         uint8_t                 bp_agree;
 314         uint8_t                 bp_agreed;
 315         uint8_t                 bp_sync;
 316         uint8_t                 bp_synced;
 317         uint8_t                 bp_proposing;
 318         uint8_t                 bp_proposed;
 319         uint8_t                 bp_operedge;
 320         uint8_t                 bp_reroot;
 321         uint8_t                 bp_rcvdtc;
 322         uint8_t                 bp_rcvdtca;
 323         uint8_t                 bp_rcvdtcn;
 324         uint32_t                bp_forward_transitions;
 325         uint8_t                 bp_txcount;
 326         struct task             bp_statetask;
 327         struct task             bp_rtagetask;
 328         struct task             bp_mediatask;
 329 };
 330
 331 /*
 332  * Software state for each bridge STP.
 333  */
 334 struct bstp_state {
 335         LIST_ENTRY(bstp_state)  bs_list;
 336         uint8_t                 bs_running;
 337         struct mtx              bs_mtx;
 338         struct bstp_pri_vector  bs_bridge_pv;
 339         struct bstp_pri_vector  bs_root_pv;
 340         struct bstp_port        *bs_root_port;
 341         uint8_t                 bs_protover;
 342         uint16_t                bs_migration_delay;
 343         uint16_t                bs_edge_delay;
 344         uint16_t                bs_bridge_max_age;
 345         uint16_t                bs_bridge_fdelay;
 346         uint16_t                bs_bridge_htime;
 347         uint16_t                bs_root_msg_age;
 348         uint16_t                bs_root_max_age;
 349         uint16_t                bs_root_fdelay;
 350         uint16_t                bs_root_htime;
 351         uint16_t                bs_hold_time;
 352         uint16_t                bs_bridge_priority;
 353         uint8_t                 bs_txholdcount;
 354         uint8_t                 bs_allsynced;
 355         struct callout          bs_bstpcallout; /* STP callout */
 356         struct bstp_timer       bs_link_timer;
 357         struct timeval          bs_last_tc_time;
 358         LIST_HEAD(, bstp_port)  bs_bplist;
 359         bstp_state_cb_t         bs_state_cb;
 360         bstp_rtage_cb_t         bs_rtage_cb;
 361         struct vnet             *bs_vnet;
 362 };
 363
 364 #define BSTP_LOCK_INIT(_bs)     mtx_init(&(_bs)->bs_mtx, "bstp", NULL, MTX_DEF)
 365 #define BSTP_LOCK_DESTROY(_bs)  mtx_destroy(&(_bs)->bs_mtx)
 366 #define BSTP_LOCK(_bs)          mtx_lock(&(_bs)->bs_mtx)
 367 #define BSTP_UNLOCK(_bs)        mtx_unlock(&(_bs)->bs_mtx)
 368 #define BSTP_LOCK_ASSERT(_bs)   mtx_assert(&(_bs)->bs_mtx, MA_OWNED)
 369
 370 extern const uint8_t bstp_etheraddr[];
 371
 372 void    bstp_attach(struct bstp_state *, struct bstp_cb_ops *);
 373 void    bstp_detach(struct bstp_state *);
 374 void    bstp_init(struct bstp_state *);
 375 void    bstp_stop(struct bstp_state *);
 376 int     bstp_create(struct bstp_state *, struct bstp_port *, struct ifnet *);
 377 int     bstp_enable(struct bstp_port *);
 378 void    bstp_disable(struct bstp_port *);
 379 void    bstp_destroy(struct bstp_port *);
 380 void    bstp_linkstate(struct bstp_port *);
 381 int     bstp_set_htime(struct bstp_state *, int);
 382 int     bstp_set_fdelay(struct bstp_state *, int);
 383 int     bstp_set_maxage(struct bstp_state *, int);
 384 int     bstp_set_holdcount(struct bstp_state *, int);
 385 int     bstp_set_protocol(struct bstp_state *, int);
 386 int     bstp_set_priority(struct bstp_state *, int);
 387 int     bstp_set_port_priority(struct bstp_port *, int);
 388 int     bstp_set_path_cost(struct bstp_port *, uint32_t);
 389 int     bstp_set_edge(struct bstp_port *, int);
 390 int     bstp_set_autoedge(struct bstp_port *, int);
 391 int     bstp_set_ptp(struct bstp_port *, int);
 392 int     bstp_set_autoptp(struct bstp_port *, int);
 393 void    bstp_input(struct bstp_port *, struct ifnet *, struct mbuf *);
 394
 395 #endif /* _KERNEL */