267 lines
9.1 KiB
C
267 lines
9.1 KiB
C
/* $NetBSD: if_bridgevar.h,v 1.4 2003/07/08 07:13:50 itojun Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jason L. Wright
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
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*
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* $FreeBSD$
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*/
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/*
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* Data structure and control definitions for STP interfaces.
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*/
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#include <sys/callout.h>
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#include <sys/queue.h>
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/* STP port states */
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#define BSTP_IFSTATE_DISABLED 0
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#define BSTP_IFSTATE_LISTENING 1
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#define BSTP_IFSTATE_LEARNING 2
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#define BSTP_IFSTATE_FORWARDING 3
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#define BSTP_IFSTATE_BLOCKING 4
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#ifdef _KERNEL
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/*
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* Spanning tree defaults.
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*/
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#define BSTP_DEFAULT_MAX_AGE (20 * 256)
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#define BSTP_DEFAULT_HELLO_TIME (2 * 256)
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#define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
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#define BSTP_DEFAULT_HOLD_TIME (1 * 256)
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#define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
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#define BSTP_DEFAULT_PORT_PRIORITY 0x80
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#define BSTP_DEFAULT_PATH_COST 55
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/* BPDU message types */
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#define BSTP_MSGTYPE_CFG 0x00 /* Configuration */
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#define BSTP_MSGTYPE_TCN 0x80 /* Topology chg notification */
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/* BPDU flags */
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#define BSTP_FLAG_TC 0x01 /* Topology change */
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#define BSTP_FLAG_TCA 0x80 /* Topology change ack */
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#define BSTP_MESSAGE_AGE_INCR (1 * 256) /* in 256ths of a second */
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#define BSTP_TICK_VAL (1 * 256) /* in 256ths of a second */
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#define BSTP_LINK_TIMER (BSTP_TICK_VAL * 30)
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/*
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* * Driver callbacks for STP state changes
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* */
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typedef void (*bstp_state_cb_t)(struct ifnet *, int);
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/*
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* Because BPDU's do not make nicely aligned structures, two different
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* declarations are used: bstp_?bpdu (wire representation, packed) and
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* bstp_*_unit (internal, nicely aligned version).
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*/
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/* configuration bridge protocol data unit */
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struct bstp_cbpdu {
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uint8_t cbu_dsap; /* LLC: destination sap */
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uint8_t cbu_ssap; /* LLC: source sap */
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uint8_t cbu_ctl; /* LLC: control */
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uint16_t cbu_protoid; /* protocol id */
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uint8_t cbu_protover; /* protocol version */
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uint8_t cbu_bpdutype; /* message type */
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uint8_t cbu_flags; /* flags (below) */
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/* root id */
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uint16_t cbu_rootpri; /* root priority */
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uint8_t cbu_rootaddr[6]; /* root address */
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uint32_t cbu_rootpathcost; /* root path cost */
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/* bridge id */
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uint16_t cbu_bridgepri; /* bridge priority */
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uint8_t cbu_bridgeaddr[6]; /* bridge address */
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uint16_t cbu_portid; /* port id */
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uint16_t cbu_messageage; /* current message age */
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uint16_t cbu_maxage; /* maximum age */
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uint16_t cbu_hellotime; /* hello time */
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uint16_t cbu_forwarddelay; /* forwarding delay */
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} __attribute__((__packed__));
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/* topology change notification bridge protocol data unit */
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struct bstp_tbpdu {
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uint8_t tbu_dsap; /* LLC: destination sap */
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uint8_t tbu_ssap; /* LLC: source sap */
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uint8_t tbu_ctl; /* LLC: control */
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uint16_t tbu_protoid; /* protocol id */
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uint8_t tbu_protover; /* protocol version */
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uint8_t tbu_bpdutype; /* message type */
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} __attribute__((__packed__));
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/*
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* Timekeeping structure used in spanning tree code.
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*/
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struct bstp_timer {
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uint16_t active;
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uint16_t value;
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};
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struct bstp_config_unit {
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uint64_t cu_rootid;
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uint64_t cu_bridge_id;
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uint32_t cu_root_path_cost;
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uint16_t cu_message_age;
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uint16_t cu_max_age;
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uint16_t cu_hello_time;
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uint16_t cu_forward_delay;
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uint16_t cu_port_id;
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uint8_t cu_message_type;
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uint8_t cu_topology_change_acknowledgment;
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uint8_t cu_topology_change;
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};
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struct bstp_tcn_unit {
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uint8_t tu_message_type;
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};
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/*
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* Bridge interface list entry.
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*/
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struct bstp_port {
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LIST_ENTRY(bstp_port) bp_next;
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struct ifnet *bp_ifp; /* parent if */
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struct bstp_state *bp_bs;
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int bp_active;
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uint64_t bp_designated_root;
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uint64_t bp_designated_bridge;
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uint32_t bp_path_cost;
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uint32_t bp_designated_cost;
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struct bstp_timer bp_hold_timer;
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struct bstp_timer bp_message_age_timer;
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struct bstp_timer bp_forward_delay_timer;
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struct bstp_config_unit bp_config_bpdu;
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uint16_t bp_port_id;
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uint16_t bp_designated_port;
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uint8_t bp_state;
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uint8_t bp_topology_change_acknowledge;
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uint8_t bp_config_pending;
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uint8_t bp_change_detection_enabled;
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uint8_t bp_priority;
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uint32_t bp_forward_transitions;
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struct task bp_statetask;
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};
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/*
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* Software state for each bridge STP.
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*/
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struct bstp_state {
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LIST_ENTRY(bstp_state) bs_list;
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struct mtx bs_mtx;
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uint64_t bs_designated_root;
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uint64_t bs_bridge_id;
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struct bstp_port *bs_root_port;
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uint32_t bs_root_path_cost;
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uint16_t bs_max_age;
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uint16_t bs_hello_time;
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uint16_t bs_forward_delay;
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uint16_t bs_bridge_max_age;
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uint16_t bs_bridge_hello_time;
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uint16_t bs_bridge_forward_delay;
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uint16_t bs_topology_change_time;
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uint16_t bs_hold_time;
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uint16_t bs_bridge_priority;
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uint8_t bs_topology_change_detected;
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uint8_t bs_topology_change;
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struct bstp_timer bs_hello_timer;
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struct bstp_timer bs_topology_change_timer;
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struct bstp_timer bs_tcn_timer;
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struct callout bs_bstpcallout; /* STP callout */
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struct bstp_timer bs_link_timer;
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struct timeval bs_last_tc_time;
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LIST_HEAD(, bstp_port) bs_bplist;
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bstp_state_cb_t bs_state_cb;
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};
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#define BSTP_LOCK_INIT(_bs) mtx_init(&(_bs)->bs_mtx, "bstp", \
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NULL, MTX_DEF)
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#define BSTP_LOCK_DESTROY(_bs) mtx_destroy(&(_bs)->bs_mtx)
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#define BSTP_LOCK(_bs) mtx_lock(&(_bs)->bs_mtx)
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#define BSTP_UNLOCK(_bs) mtx_unlock(&(_bs)->bs_mtx)
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#define BSTP_LOCK_ASSERT(_bs) mtx_assert(&(_bs)->bs_mtx, MA_OWNED)
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extern const uint8_t bstp_etheraddr[];
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extern void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
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void bstp_attach(struct bstp_state *, bstp_state_cb_t);
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void bstp_detach(struct bstp_state *);
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void bstp_init(struct bstp_state *);
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void bstp_reinit(struct bstp_state *);
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void bstp_stop(struct bstp_state *);
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int bstp_add(struct bstp_state *, struct bstp_port *, struct ifnet *);
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void bstp_delete(struct bstp_port *);
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void bstp_drain(struct bstp_port *);
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void bstp_linkstate(struct ifnet *, int);
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struct mbuf *bstp_input(struct bstp_port *, struct ifnet *, struct mbuf *);
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#endif /* _KERNEL */
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