Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net/bridgestp.h
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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 * $FreeBSD$ 73 */ 74 75 /* 76 * Data structure and control definitions for STP interfaces. 77 */ 78 79 #include <sys/callout.h> 80 #include <sys/queue.h> 81 82 /* STP port states */ 83 #define BSTP_IFSTATE_DISABLED 0 84 #define BSTP_IFSTATE_LISTENING 1 85 #define BSTP_IFSTATE_LEARNING 2 86 #define BSTP_IFSTATE_FORWARDING 3 87 #define BSTP_IFSTATE_BLOCKING 4 88 #define BSTP_IFSTATE_DISCARDING 5 89 90 #define BSTP_TCSTATE_ACTIVE 1 91 #define BSTP_TCSTATE_DETECTED 2 92 #define BSTP_TCSTATE_INACTIVE 3 93 #define BSTP_TCSTATE_LEARNING 4 94 #define BSTP_TCSTATE_PROPAG 5 95 #define BSTP_TCSTATE_ACK 6 96 #define BSTP_TCSTATE_TC 7 97 #define BSTP_TCSTATE_TCN 8 98 99 #define BSTP_ROLE_DISABLED 0 100 #define BSTP_ROLE_ROOT 1 101 #define BSTP_ROLE_DESIGNATED 2 102 #define BSTP_ROLE_ALTERNATE 3 103 #define BSTP_ROLE_BACKUP 4 104 105 #ifdef _KERNEL 106 107 /* STP port flags */ 108 #define BSTP_PORT_CANMIGRATE 0x0001 109 #define BSTP_PORT_NEWINFO 0x0002 110 #define BSTP_PORT_DISPUTED 0x0004 111 #define BSTP_PORT_ADMCOST 0x0008 112 #define BSTP_PORT_AUTOEDGE 0x0010 113 #define BSTP_PORT_AUTOPTP 0x0020 114 #define BSTP_PORT_ADMEDGE 0x0040 115 #define BSTP_PORT_PNDCOST 0x0080 116 117 /* BPDU priority */ 118 #define BSTP_PDU_SUPERIOR 1 119 #define BSTP_PDU_REPEATED 2 120 #define BSTP_PDU_INFERIOR 3 121 #define BSTP_PDU_INFERIORALT 4 122 #define BSTP_PDU_OTHER 5 123 124 /* BPDU flags */ 125 #define BSTP_PDU_PRMASK 0x0c /* Port Role */ 126 #define BSTP_PDU_PRSHIFT 2 /* Port Role offset */ 127 #define BSTP_PDU_F_UNKN 0x00 /* Unknown port (00) */ 128 #define BSTP_PDU_F_ALT 0x01 /* Alt/Backup port (01) */ 129 #define BSTP_PDU_F_ROOT 0x02 /* Root port (10) */ 130 #define BSTP_PDU_F_DESG 0x03 /* Designated port (11) */ 131 132 #define BSTP_PDU_STPMASK 0x81 /* strip unused STP flags */ 133 #define BSTP_PDU_RSTPMASK 0x7f /* strip unused RSTP flags */ 134 #define BSTP_PDU_F_TC 0x01 /* Topology change */ 135 #define BSTP_PDU_F_P 0x02 /* Proposal flag */ 136 #define BSTP_PDU_F_L 0x10 /* Learning flag */ 137 #define BSTP_PDU_F_F 0x20 /* Forwarding flag */ 138 #define BSTP_PDU_F_A 0x40 /* Agreement flag */ 139 #define BSTP_PDU_F_TCA 0x80 /* Topology change ack */ 140 141 /* 142 * Spanning tree defaults. 143 */ 144 #define BSTP_DEFAULT_MAX_AGE (20 * 256) 145 #define BSTP_DEFAULT_HELLO_TIME (2 * 256) 146 #define BSTP_DEFAULT_FORWARD_DELAY (15 * 256) 147 #define BSTP_DEFAULT_HOLD_TIME (1 * 256) 148 #define BSTP_DEFAULT_MIGRATE_DELAY (3 * 256) 149 #define BSTP_DEFAULT_HOLD_COUNT 6 150 #define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000 151 #define BSTP_DEFAULT_PORT_PRIORITY 0x80 152 #define BSTP_DEFAULT_PATH_COST 55 153 #define BSTP_MIN_HELLO_TIME (1 * 256) 154 #define BSTP_MIN_MAX_AGE (6 * 256) 155 #define BSTP_MIN_FORWARD_DELAY (4 * 256) 156 #define BSTP_MIN_HOLD_COUNT 1 157 #define BSTP_MAX_HELLO_TIME (2 * 256) 158 #define BSTP_MAX_MAX_AGE (40 * 256) 159 #define BSTP_MAX_FORWARD_DELAY (30 * 256) 160 #define BSTP_MAX_HOLD_COUNT 10 161 #define BSTP_MAX_PRIORITY 61440 162 #define BSTP_MAX_PORT_PRIORITY 240 163 #define BSTP_MAX_PATH_COST 200000000 164 165 /* BPDU message types */ 166 #define BSTP_MSGTYPE_CFG 0x00 /* Configuration */ 167 #define BSTP_MSGTYPE_RSTP 0x02 /* Rapid STP */ 168 #define BSTP_MSGTYPE_TCN 0x80 /* Topology chg notification */ 169 170 /* Protocol versions */ 171 #define BSTP_PROTO_ID 0x00 172 #define BSTP_PROTO_STP 0x00 173 #define BSTP_PROTO_RSTP 0x02 174 #define BSTP_PROTO_MAX BSTP_PROTO_RSTP 175 176 #define BSTP_INFO_RECEIVED 1 177 #define BSTP_INFO_MINE 2 178 #define BSTP_INFO_AGED 3 179 #define BSTP_INFO_DISABLED 4 180 181 182 #define BSTP_MESSAGE_AGE_INCR (1 * 256) /* in 256ths of a second */ 183 #define BSTP_TICK_VAL (1 * 256) /* in 256ths of a second */ 184 #define BSTP_LINK_TIMER (BSTP_TICK_VAL * 15) 185 186 /* 187 * Driver callbacks for STP state changes 188 */ 189 typedef void (*bstp_state_cb_t)(struct ifnet *, int); 190 typedef void (*bstp_rtage_cb_t)(struct ifnet *, int); 191 struct bstp_cb_ops { 192 bstp_state_cb_t bcb_state; 193 bstp_rtage_cb_t bcb_rtage; 194 }; 195 196 /* 197 * Because BPDU's do not make nicely aligned structures, two different 198 * declarations are used: bstp_?bpdu (wire representation, packed) and 199 * bstp_*_unit (internal, nicely aligned version). 200 */ 201 202 /* configuration bridge protocol data unit */ 203 struct bstp_cbpdu { 204 uint8_t cbu_dsap; /* LLC: destination sap */ 205 uint8_t cbu_ssap; /* LLC: source sap */ 206 uint8_t cbu_ctl; /* LLC: control */ 207 uint16_t cbu_protoid; /* protocol id */ 208 uint8_t cbu_protover; /* protocol version */ 209 uint8_t cbu_bpdutype; /* message type */ 210 uint8_t cbu_flags; /* flags (below) */ 211 212 /* root id */ 213 uint16_t cbu_rootpri; /* root priority */ 214 uint8_t cbu_rootaddr[6]; /* root address */ 215 216 uint32_t cbu_rootpathcost; /* root path cost */ 217 218 /* bridge id */ 219 uint16_t cbu_bridgepri; /* bridge priority */ 220 uint8_t cbu_bridgeaddr[6]; /* bridge address */ 221 222 uint16_t cbu_portid; /* port id */ 223 uint16_t cbu_messageage; /* current message age */ 224 uint16_t cbu_maxage; /* maximum age */ 225 uint16_t cbu_hellotime; /* hello time */ 226 uint16_t cbu_forwarddelay; /* forwarding delay */ 227 uint8_t cbu_versionlen; /* version 1 length */ 228 } __packed; 229 #define BSTP_BPDU_STP_LEN (3 + 35) /* LLC + STP pdu */ 230 #define BSTP_BPDU_RSTP_LEN (3 + 36) /* LLC + RSTP pdu */ 231 232 /* topology change notification bridge protocol data unit */ 233 struct bstp_tbpdu { 234 uint8_t tbu_dsap; /* LLC: destination sap */ 235 uint8_t tbu_ssap; /* LLC: source sap */ 236 uint8_t tbu_ctl; /* LLC: control */ 237 uint16_t tbu_protoid; /* protocol id */ 238 uint8_t tbu_protover; /* protocol version */ 239 uint8_t tbu_bpdutype; /* message type */ 240 } __packed; 241 242 /* 243 * Timekeeping structure used in spanning tree code. 244 */ 245 struct bstp_timer { 246 int active; 247 int latched; 248 int value; 249 }; 250 251 struct bstp_pri_vector { 252 uint64_t pv_root_id; 253 uint32_t pv_cost; 254 uint64_t pv_dbridge_id; 255 uint16_t pv_dport_id; 256 uint16_t pv_port_id; 257 }; 258 259 struct bstp_config_unit { 260 struct bstp_pri_vector cu_pv; 261 uint16_t cu_message_age; 262 uint16_t cu_max_age; 263 uint16_t cu_forward_delay; 264 uint16_t cu_hello_time; 265 uint8_t cu_message_type; 266 uint8_t cu_topology_change_ack; 267 uint8_t cu_topology_change; 268 uint8_t cu_proposal; 269 uint8_t cu_agree; 270 uint8_t cu_learning; 271 uint8_t cu_forwarding; 272 uint8_t cu_role; 273 }; 274 275 struct bstp_tcn_unit { 276 uint8_t tu_message_type; 277 }; 278 279 struct bstp_port { 280 LIST_ENTRY(bstp_port) bp_next; 281 struct ifnet *bp_ifp; /* parent if */ 282 struct bstp_state *bp_bs; 283 uint8_t bp_active; 284 uint8_t bp_protover; 285 uint32_t bp_flags; 286 uint32_t bp_path_cost; 287 uint16_t bp_port_msg_age; 288 uint16_t bp_port_max_age; 289 uint16_t bp_port_fdelay; 290 uint16_t bp_port_htime; 291 uint16_t bp_desg_msg_age; 292 uint16_t bp_desg_max_age; 293 uint16_t bp_desg_fdelay; 294 uint16_t bp_desg_htime; 295 struct bstp_timer bp_edge_delay_timer; 296 struct bstp_timer bp_forward_delay_timer; 297 struct bstp_timer bp_hello_timer; 298 struct bstp_timer bp_message_age_timer; 299 struct bstp_timer bp_migrate_delay_timer; 300 struct bstp_timer bp_recent_backup_timer; 301 struct bstp_timer bp_recent_root_timer; 302 struct bstp_timer bp_tc_timer; 303 struct bstp_config_unit bp_msg_cu; 304 struct bstp_pri_vector bp_desg_pv; 305 struct bstp_pri_vector bp_port_pv; 306 uint16_t bp_port_id; 307 uint8_t bp_state; 308 uint8_t bp_tcstate; 309 uint8_t bp_role; 310 uint8_t bp_infois; 311 uint8_t bp_tc_ack; 312 uint8_t bp_tc_prop; 313 uint8_t bp_fdbflush; 314 uint8_t bp_priority; 315 uint8_t bp_ptp_link; 316 uint8_t bp_agree; 317 uint8_t bp_agreed; 318 uint8_t bp_sync; 319 uint8_t bp_synced; 320 uint8_t bp_proposing; 321 uint8_t bp_proposed; 322 uint8_t bp_operedge; 323 uint8_t bp_reroot; 324 uint8_t bp_rcvdtc; 325 uint8_t bp_rcvdtca; 326 uint8_t bp_rcvdtcn; 327 uint32_t bp_forward_transitions; 328 uint8_t bp_txcount; 329 struct task bp_statetask; 330 struct task bp_rtagetask; 331 struct task bp_mediatask; 332 }; 333 334 /* 335 * Software state for each bridge STP. 336 */ 337 struct bstp_state { 338 LIST_ENTRY(bstp_state) bs_list; 339 uint8_t bs_running; 340 struct mtx bs_mtx; 341 struct bstp_pri_vector bs_bridge_pv; 342 struct bstp_pri_vector bs_root_pv; 343 struct bstp_port *bs_root_port; 344 uint8_t bs_protover; 345 uint16_t bs_migration_delay; 346 uint16_t bs_edge_delay; 347 uint16_t bs_bridge_max_age; 348 uint16_t bs_bridge_fdelay; 349 uint16_t bs_bridge_htime; 350 uint16_t bs_root_msg_age; 351 uint16_t bs_root_max_age; 352 uint16_t bs_root_fdelay; 353 uint16_t bs_root_htime; 354 uint16_t bs_hold_time; 355 uint16_t bs_bridge_priority; 356 uint8_t bs_txholdcount; 357 uint8_t bs_allsynced; 358 struct callout bs_bstpcallout; /* STP callout */ 359 struct bstp_timer bs_link_timer; 360 struct timeval bs_last_tc_time; 361 LIST_HEAD(, bstp_port) bs_bplist; 362 bstp_state_cb_t bs_state_cb; 363 bstp_rtage_cb_t bs_rtage_cb; 364 struct vnet *bs_vnet; 365 }; 366 367 #define BSTP_LOCK_INIT(_bs) mtx_init(&(_bs)->bs_mtx, "bstp", NULL, MTX_DEF) 368 #define BSTP_LOCK_DESTROY(_bs) mtx_destroy(&(_bs)->bs_mtx) 369 #define BSTP_LOCK(_bs) mtx_lock(&(_bs)->bs_mtx) 370 #define BSTP_UNLOCK(_bs) mtx_unlock(&(_bs)->bs_mtx) 371 #define BSTP_LOCK_ASSERT(_bs) mtx_assert(&(_bs)->bs_mtx, MA_OWNED) 372 373 extern const uint8_t bstp_etheraddr[]; 374 375 void bstp_attach(struct bstp_state *, struct bstp_cb_ops *); 376 void bstp_detach(struct bstp_state *); 377 void bstp_init(struct bstp_state *); 378 void bstp_stop(struct bstp_state *); 379 int bstp_create(struct bstp_state *, struct bstp_port *, struct ifnet *); 380 int bstp_enable(struct bstp_port *); 381 void bstp_disable(struct bstp_port *); 382 void bstp_destroy(struct bstp_port *); 383 void bstp_linkstate(struct bstp_port *); 384 int bstp_set_htime(struct bstp_state *, int); 385 int bstp_set_fdelay(struct bstp_state *, int); 386 int bstp_set_maxage(struct bstp_state *, int); 387 int bstp_set_holdcount(struct bstp_state *, int); 388 int bstp_set_protocol(struct bstp_state *, int); 389 int bstp_set_priority(struct bstp_state *, int); 390 int bstp_set_port_priority(struct bstp_port *, int); 391 int bstp_set_path_cost(struct bstp_port *, uint32_t); 392 int bstp_set_edge(struct bstp_port *, int); 393 int bstp_set_autoedge(struct bstp_port *, int); 394 int bstp_set_ptp(struct bstp_port *, int); 395 int bstp_set_autoptp(struct bstp_port *, int); 396 void bstp_input(struct bstp_port *, struct ifnet *, struct mbuf *); 397 398 #endif /* _KERNEL */
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