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c25789cc22
freebsd-nq/sys/net/bridgestp.h
Andrew Thompson c25789cc22 MFp4 
- Each stp port is added sequentially so it was possible for our bridgeid to
   change every time because the new port has a lower MAC address.  Instead
   just find the lowest MAC address from all Ethernet adapters in the machine
   as the value only needs to be unique, this stops a lot of churn on the
   protocol.
 - Update the states after enabling or disabling a port.
 - Keep tabs if we have been stopped or started by our parent bridge.
 - The callout only needs to be drained before destroying the mutex, move it to
   bstp_detach.
2006-11-09 22:50:49 +00:00

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/* $NetBSD: if_bridgevar.h,v 1.4 2003/07/08 07:13:50 itojun Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
*
* $FreeBSD$
*/
/*
* Data structure and control definitions for STP interfaces.
*/
#include <sys/callout.h>
#include <sys/queue.h>
/* STP port states */
#define BSTP_IFSTATE_DISABLED 0
#define BSTP_IFSTATE_LISTENING 1
#define BSTP_IFSTATE_LEARNING 2
#define BSTP_IFSTATE_FORWARDING 3
#define BSTP_IFSTATE_BLOCKING 4
#define BSTP_IFSTATE_DISCARDING 5
#define BSTP_TCSTATE_ACTIVE 1
#define BSTP_TCSTATE_DETECTED 2
#define BSTP_TCSTATE_INACTIVE 3
#define BSTP_TCSTATE_LEARNING 4
#define BSTP_TCSTATE_PROPAG 5
#define BSTP_TCSTATE_ACK 6
#define BSTP_TCSTATE_TC 7
#define BSTP_TCSTATE_TCN 8
#define BSTP_ROLE_DISABLED 0
#define BSTP_ROLE_ROOT 1
#define BSTP_ROLE_DESIGNATED 2
#define BSTP_ROLE_ALTERNATE 3
#define BSTP_ROLE_BACKUP 4
#ifdef _KERNEL
/* STP port flags */
#define BSTP_PORT_CANMIGRATE 0x0001
#define BSTP_PORT_NEWINFO 0x0002
#define BSTP_PORT_DISPUTED 0x0004
#define BSTP_PORT_ADMCOST 0x0008
#define BSTP_PORT_AUTOEDGE 0x0010
/* BPDU priority */
#define BSTP_PDU_SUPERIOR 1
#define BSTP_PDU_REPEATED 2
#define BSTP_PDU_INFERIOR 3
#define BSTP_PDU_INFERIORALT 4
#define BSTP_PDU_OTHER 5
/* BPDU flags */
#define BSTP_PDU_PRMASK 0x0c /* Port Role */
#define BSTP_PDU_PRSHIFT 2 /* Port Role offset */
#define BSTP_PDU_F_UNKN 0x00 /* Unknown port (00) */
#define BSTP_PDU_F_ALT 0x01 /* Alt/Backup port (01) */
#define BSTP_PDU_F_ROOT 0x02 /* Root port (10) */
#define BSTP_PDU_F_DESG 0x03 /* Designated port (11) */
#define BSTP_PDU_STPMASK 0x81 /* strip unused STP flags */
#define BSTP_PDU_RSTPMASK 0x7f /* strip unused RSTP flags */
#define BSTP_PDU_F_TC 0x01 /* Topology change */
#define BSTP_PDU_F_P 0x02 /* Proposal flag */
#define BSTP_PDU_F_L 0x10 /* Learning flag */
#define BSTP_PDU_F_F 0x20 /* Forwarding flag */
#define BSTP_PDU_F_A 0x40 /* Agreement flag */
#define BSTP_PDU_F_TCA 0x80 /* Topology change ack */
/*
* Spanning tree defaults.
*/
#define BSTP_DEFAULT_MAX_AGE (20 * 256)
#define BSTP_DEFAULT_HELLO_TIME (2 * 256)
#define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
#define BSTP_DEFAULT_HOLD_TIME (1 * 256)
#define BSTP_DEFAULT_MIGRATE_DELAY (3 * 256)
#define BSTP_DEFAULT_HOLD_COUNT 6
#define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
#define BSTP_DEFAULT_PORT_PRIORITY 0x80
#define BSTP_DEFAULT_PATH_COST 55
#define BSTP_MIN_HELLO_TIME (1 * 256)
#define BSTP_MIN_MAX_AGE (6 * 256)
#define BSTP_MIN_FORWARD_DELAY (4 * 256)
#define BSTP_MIN_HOLD_COUNT 1
#define BSTP_MAX_HELLO_TIME (2 * 256)
#define BSTP_MAX_MAX_AGE (40 * 256)
#define BSTP_MAX_FORWARD_DELAY (30 * 256)
#define BSTP_MAX_HOLD_COUNT 10
#define BSTP_MAX_PRIORITY 61440
#define BSTP_MAX_PORT_PRIORITY 240
#define BSTP_MAX_PATH_COST 200000000
/* BPDU message types */
#define BSTP_MSGTYPE_CFG 0x00 /* Configuration */
#define BSTP_MSGTYPE_RSTP 0x02 /* Rapid STP */
#define BSTP_MSGTYPE_TCN 0x80 /* Topology chg notification */
/* Protocol versions */
#define BSTP_PROTO_ID 0x00
#define BSTP_PROTO_STP 0x00
#define BSTP_PROTO_RSTP 0x02
#define BSTP_PROTO_MAX BSTP_PROTO_RSTP
#define BSTP_INFO_RECIEVED 1
#define BSTP_INFO_MINE 2
#define BSTP_INFO_AGED 3
#define BSTP_INFO_DISABLED 4
#define BSTP_MESSAGE_AGE_INCR (1 * 256) /* in 256ths of a second */
#define BSTP_TICK_VAL (1 * 256) /* in 256ths of a second */
#define BSTP_LINK_TIMER (BSTP_TICK_VAL * 15)
/*
* Driver callbacks for STP state changes
*/
typedef void (*bstp_state_cb_t)(struct ifnet *, int);
typedef void (*bstp_rtage_cb_t)(struct ifnet *, int);
/*
* Because BPDU's do not make nicely aligned structures, two different
* declarations are used: bstp_?bpdu (wire representation, packed) and
* bstp_*_unit (internal, nicely aligned version).
*/
/* configuration bridge protocol data unit */
struct bstp_cbpdu {
uint8_t cbu_dsap; /* LLC: destination sap */
uint8_t cbu_ssap; /* LLC: source sap */
uint8_t cbu_ctl; /* LLC: control */
uint16_t cbu_protoid; /* protocol id */
uint8_t cbu_protover; /* protocol version */
uint8_t cbu_bpdutype; /* message type */
uint8_t cbu_flags; /* flags (below) */
/* root id */
uint16_t cbu_rootpri; /* root priority */
uint8_t cbu_rootaddr[6]; /* root address */
uint32_t cbu_rootpathcost; /* root path cost */
/* bridge id */
uint16_t cbu_bridgepri; /* bridge priority */
uint8_t cbu_bridgeaddr[6]; /* bridge address */
uint16_t cbu_portid; /* port id */
uint16_t cbu_messageage; /* current message age */
uint16_t cbu_maxage; /* maximum age */
uint16_t cbu_hellotime; /* hello time */
uint16_t cbu_forwarddelay; /* forwarding delay */
uint8_t cbu_versionlen; /* version 1 length */
} __attribute__((__packed__));
#define BSTP_BPDU_STP_LEN (3 + 35) /* LLC + STP pdu */
#define BSTP_BPDU_RSTP_LEN (3 + 36) /* LLC + RSTP pdu */
/* topology change notification bridge protocol data unit */
struct bstp_tbpdu {
uint8_t tbu_dsap; /* LLC: destination sap */
uint8_t tbu_ssap; /* LLC: source sap */
uint8_t tbu_ctl; /* LLC: control */
uint16_t tbu_protoid; /* protocol id */
uint8_t tbu_protover; /* protocol version */
uint8_t tbu_bpdutype; /* message type */
} __attribute__((__packed__));
/*
* Timekeeping structure used in spanning tree code.
*/
struct bstp_timer {
int active;
int latched;
int value;
};
struct bstp_pri_vector {
uint64_t pv_root_id;
uint32_t pv_cost;
uint64_t pv_dbridge_id;
uint16_t pv_dport_id;
uint16_t pv_port_id;
};
struct bstp_config_unit {
struct bstp_pri_vector cu_pv;
uint16_t cu_message_age;
uint16_t cu_max_age;
uint16_t cu_forward_delay;
uint16_t cu_hello_time;
uint8_t cu_message_type;
uint8_t cu_topology_change_ack;
uint8_t cu_topology_change;
uint8_t cu_proposal;
uint8_t cu_agree;
uint8_t cu_learning;
uint8_t cu_forwarding;
uint8_t cu_role;
};
struct bstp_tcn_unit {
uint8_t tu_message_type;
};
struct bstp_port {
LIST_ENTRY(bstp_port) bp_next;
struct ifnet *bp_ifp; /* parent if */
struct bstp_state *bp_bs;
uint8_t bp_active;
uint8_t bp_protover;
uint32_t bp_flags;
uint32_t bp_path_cost;
uint16_t bp_port_msg_age;
uint16_t bp_port_max_age;
uint16_t bp_port_fdelay;
uint16_t bp_port_htime;
uint16_t bp_desg_msg_age;
uint16_t bp_desg_max_age;
uint16_t bp_desg_fdelay;
uint16_t bp_desg_htime;
struct bstp_timer bp_edge_delay_timer;
struct bstp_timer bp_forward_delay_timer;
struct bstp_timer bp_hello_timer;
struct bstp_timer bp_message_age_timer;
struct bstp_timer bp_migrate_delay_timer;
struct bstp_timer bp_recent_backup_timer;
struct bstp_timer bp_recent_root_timer;
struct bstp_timer bp_tc_timer;
struct bstp_config_unit bp_msg_cu;
struct bstp_pri_vector bp_desg_pv;
struct bstp_pri_vector bp_port_pv;
uint16_t bp_port_id;
uint8_t bp_state;
uint8_t bp_tcstate;
uint8_t bp_role;
uint8_t bp_infois;
uint8_t bp_tc_ack;
uint8_t bp_tc_prop;
uint8_t bp_fdbflush;
uint8_t bp_priority;
uint8_t bp_p2p_link;
uint8_t bp_agree;
uint8_t bp_agreed;
uint8_t bp_sync;
uint8_t bp_synced;
uint8_t bp_proposing;
uint8_t bp_proposed;
uint8_t bp_operedge;
uint8_t bp_reroot;
uint8_t bp_rcvdtc;
uint8_t bp_rcvdtca;
uint8_t bp_rcvdtcn;
uint32_t bp_forward_transitions;
uint8_t bp_txcount;
struct task bp_statetask;
struct task bp_rtagetask;
};
/*
* Software state for each bridge STP.
*/
struct bstp_state {
LIST_ENTRY(bstp_state) bs_list;
uint8_t bs_running;
struct mtx bs_mtx;
struct bstp_pri_vector bs_bridge_pv;
struct bstp_pri_vector bs_root_pv;
struct bstp_port *bs_root_port;
uint8_t bs_protover;
uint16_t bs_migration_delay;
uint16_t bs_edge_delay;
uint16_t bs_bridge_max_age;
uint16_t bs_bridge_fdelay;
uint16_t bs_bridge_htime;
uint16_t bs_root_msg_age;
uint16_t bs_root_max_age;
uint16_t bs_root_fdelay;
uint16_t bs_root_htime;
uint16_t bs_hold_time;
uint16_t bs_bridge_priority;
uint8_t bs_txholdcount;
uint8_t bs_allsynced;
struct callout bs_bstpcallout; /* STP callout */
struct bstp_timer bs_link_timer;
struct timeval bs_last_tc_time;
LIST_HEAD(, bstp_port) bs_bplist;
bstp_state_cb_t bs_state_cb;
bstp_rtage_cb_t bs_rtage_cb;
};
#define BSTP_LOCK_INIT(_bs) mtx_init(&(_bs)->bs_mtx, "bstp", NULL, MTX_DEF)
#define BSTP_LOCK_DESTROY(_bs) mtx_destroy(&(_bs)->bs_mtx)
#define BSTP_LOCK(_bs) mtx_lock(&(_bs)->bs_mtx)
#define BSTP_UNLOCK(_bs) mtx_unlock(&(_bs)->bs_mtx)
#define BSTP_LOCK_ASSERT(_bs) mtx_assert(&(_bs)->bs_mtx, MA_OWNED)
extern const uint8_t bstp_etheraddr[];
extern void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
void bstp_attach(struct bstp_state *, bstp_state_cb_t, bstp_rtage_cb_t);
void bstp_detach(struct bstp_state *);
void bstp_init(struct bstp_state *);
void bstp_stop(struct bstp_state *);
int bstp_add(struct bstp_state *, struct bstp_port *, struct ifnet *);
void bstp_delete(struct bstp_port *);
void bstp_drain(struct bstp_port *);
void bstp_linkstate(struct ifnet *, int);
int bstp_set_htime(struct bstp_state *, int);
int bstp_set_fdelay(struct bstp_state *, int);
int bstp_set_maxage(struct bstp_state *, int);
int bstp_set_holdcount(struct bstp_state *, int);
int bstp_set_protocol(struct bstp_state *, int);
int bstp_set_priority(struct bstp_state *, int);
int bstp_set_port_priority(struct bstp_port *, int);
int bstp_set_path_cost(struct bstp_port *, uint32_t);
int bstp_set_edge(struct bstp_port *, int);
int bstp_set_autoedge(struct bstp_port *, int);
struct mbuf *bstp_input(struct bstp_port *, struct ifnet *, struct mbuf *);
#endif /* _KERNEL */
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