2299 lines
56 KiB
C
2299 lines
56 KiB
C
/* $OpenBSD: bridgestp.c,v 1.77 2021/03/10 10:21:47 jsg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2000 Jason L. Wright (jason@thought.net)
|
|
* Copyright (c) 2006 Andrew Thompson (thompsa@FreeBSD.org)
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Implementation of the spanning tree protocol as defined in
|
|
* ISO/IEC 802.1D-2004, June 9, 2004.
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/device.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/timeout.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_types.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_llc.h>
|
|
#include <net/netisr.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/ip.h>
|
|
#include <netinet/if_ether.h>
|
|
|
|
#include <net/if_bridge.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
|
|
|
|
/* 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 */
|
|
|
|
#define BSTP_INFO_RECEIVED 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)
|
|
|
|
#ifdef BRIDGESTP_DEBUG
|
|
#define DPRINTF(bp, fmt, arg...) \
|
|
do { \
|
|
struct ifnet *__ifp = if_get((bp)->bp_ifindex); \
|
|
printf("bstp: %s" fmt, __ifp? __ifp->if_xname : "Unknown", ##arg); \
|
|
if_put(__ifp); \
|
|
} while (0)
|
|
#else
|
|
#define DPRINTF(bp, fmt, arg...)
|
|
#endif
|
|
|
|
#define PV2ADDR(pv, eaddr) do { \
|
|
eaddr[0] = pv >> 40; \
|
|
eaddr[1] = pv >> 32; \
|
|
eaddr[2] = pv >> 24; \
|
|
eaddr[3] = pv >> 16; \
|
|
eaddr[4] = pv >> 8; \
|
|
eaddr[5] = pv >> 0; \
|
|
} while (0)
|
|
|
|
#define INFO_BETTER 1
|
|
#define INFO_SAME 0
|
|
#define INFO_WORSE -1
|
|
|
|
#define BSTP_IFQ_PRIO 6
|
|
|
|
/*
|
|
* 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 {
|
|
u_int8_t cbu_dsap; /* LLC: destination sap */
|
|
u_int8_t cbu_ssap; /* LLC: source sap */
|
|
u_int8_t cbu_ctl; /* LLC: control */
|
|
u_int16_t cbu_protoid; /* protocol id */
|
|
u_int8_t cbu_protover; /* protocol version */
|
|
u_int8_t cbu_bpdutype; /* message type */
|
|
u_int8_t cbu_flags; /* flags (below) */
|
|
|
|
/* root id */
|
|
u_int16_t cbu_rootpri; /* root priority */
|
|
u_int8_t cbu_rootaddr[6]; /* root address */
|
|
|
|
u_int32_t cbu_rootpathcost; /* root path cost */
|
|
|
|
/* bridge id */
|
|
u_int16_t cbu_bridgepri; /* bridge priority */
|
|
u_int8_t cbu_bridgeaddr[6]; /* bridge address */
|
|
|
|
u_int16_t cbu_portid; /* port id */
|
|
u_int16_t cbu_messageage; /* current message age */
|
|
u_int16_t cbu_maxage; /* maximum age */
|
|
u_int16_t cbu_hellotime; /* hello time */
|
|
u_int16_t cbu_forwarddelay; /* forwarding delay */
|
|
u_int8_t cbu_versionlen; /* version 1 length */
|
|
} __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 {
|
|
u_int8_t tbu_dsap; /* LLC: destination sap */
|
|
u_int8_t tbu_ssap; /* LLC: source sap */
|
|
u_int8_t tbu_ctl; /* LLC: control */
|
|
u_int16_t tbu_protoid; /* protocol id */
|
|
u_int8_t tbu_protover; /* protocol version */
|
|
u_int8_t tbu_bpdutype; /* message type */
|
|
} __packed;
|
|
|
|
const u_int8_t bstp_etheraddr[] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
|
|
|
|
|
|
void bstp_transmit(struct bstp_state *, struct bstp_port *);
|
|
void bstp_transmit_bpdu(struct bstp_state *, struct bstp_port *);
|
|
void bstp_transmit_tcn(struct bstp_state *, struct bstp_port *);
|
|
void bstp_decode_bpdu(struct bstp_port *, struct bstp_cbpdu *,
|
|
struct bstp_config_unit *);
|
|
void bstp_send_bpdu(struct bstp_state *, struct bstp_port *,
|
|
struct bstp_cbpdu *);
|
|
int bstp_pdu_flags(struct bstp_port *);
|
|
void bstp_received_stp(struct bstp_state *, struct bstp_port *,
|
|
struct mbuf **, struct bstp_tbpdu *);
|
|
void bstp_received_rstp(struct bstp_state *, struct bstp_port *,
|
|
struct mbuf **, struct bstp_tbpdu *);
|
|
void bstp_received_tcn(struct bstp_state *, struct bstp_port *,
|
|
struct bstp_tcn_unit *);
|
|
void bstp_received_bpdu(struct bstp_state *, struct bstp_port *,
|
|
struct bstp_config_unit *);
|
|
int bstp_pdu_rcvtype(struct bstp_port *, struct bstp_config_unit *);
|
|
int bstp_pdu_bettersame(struct bstp_port *, int);
|
|
int bstp_info_cmp(struct bstp_pri_vector *,
|
|
struct bstp_pri_vector *);
|
|
int bstp_info_superior(struct bstp_pri_vector *,
|
|
struct bstp_pri_vector *);
|
|
void bstp_assign_roles(struct bstp_state *);
|
|
void bstp_update_roles(struct bstp_state *, struct bstp_port *);
|
|
void bstp_update_state(struct bstp_state *, struct bstp_port *);
|
|
void bstp_update_tc(struct bstp_port *);
|
|
void bstp_update_info(struct bstp_port *);
|
|
void bstp_set_other_tcprop(struct bstp_port *);
|
|
void bstp_set_all_reroot(struct bstp_state *);
|
|
void bstp_set_all_sync(struct bstp_state *);
|
|
void bstp_set_port_state(struct bstp_port *, int);
|
|
void bstp_set_port_role(struct bstp_port *, int);
|
|
void bstp_set_port_proto(struct bstp_port *, int);
|
|
void bstp_set_port_tc(struct bstp_port *, int);
|
|
void bstp_set_timer_tc(struct bstp_port *);
|
|
void bstp_set_timer_msgage(struct bstp_port *);
|
|
void bstp_reset(struct bstp_state *);
|
|
int bstp_rerooted(struct bstp_state *, struct bstp_port *);
|
|
u_int32_t bstp_calc_path_cost(struct bstp_port *);
|
|
void bstp_notify_rtage(struct bstp_port *, int);
|
|
void bstp_ifupdstatus(struct bstp_state *, struct bstp_port *);
|
|
void bstp_enable_port(struct bstp_state *, struct bstp_port *);
|
|
void bstp_disable_port(struct bstp_state *, struct bstp_port *);
|
|
void bstp_tick(void *);
|
|
void bstp_timer_start(struct bstp_timer *, u_int16_t);
|
|
void bstp_timer_stop(struct bstp_timer *);
|
|
void bstp_timer_latch(struct bstp_timer *);
|
|
int bstp_timer_expired(struct bstp_timer *);
|
|
void bstp_hello_timer_expiry(struct bstp_state *,
|
|
struct bstp_port *);
|
|
void bstp_message_age_expiry(struct bstp_state *,
|
|
struct bstp_port *);
|
|
void bstp_migrate_delay_expiry(struct bstp_state *,
|
|
struct bstp_port *);
|
|
void bstp_edge_delay_expiry(struct bstp_state *,
|
|
struct bstp_port *);
|
|
int bstp_addr_cmp(const u_int8_t *, const u_int8_t *);
|
|
int bstp_same_bridgeid(u_int64_t, u_int64_t);
|
|
|
|
|
|
void
|
|
bstp_transmit(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
if ((ifp = if_get(bs->bs_ifindex)) == NULL)
|
|
return;
|
|
|
|
if ((ifp->if_flags & IFF_RUNNING) == 0 || bp == NULL) {
|
|
if_put(ifp);
|
|
return;
|
|
}
|
|
if_put(ifp);
|
|
|
|
/*
|
|
* a PDU can only be sent if we have tx quota left and the
|
|
* hello timer is running.
|
|
*/
|
|
if (bp->bp_hello_timer.active == 0) {
|
|
/* Test if it needs to be reset */
|
|
bstp_hello_timer_expiry(bs, bp);
|
|
return;
|
|
}
|
|
if (bp->bp_txcount > bs->bs_txholdcount)
|
|
/* Ran out of karma */
|
|
return;
|
|
|
|
if (bp->bp_protover == BSTP_PROTO_RSTP) {
|
|
bstp_transmit_bpdu(bs, bp);
|
|
bp->bp_tc_ack = 0;
|
|
} else { /* STP */
|
|
switch (bp->bp_role) {
|
|
case BSTP_ROLE_DESIGNATED:
|
|
bstp_transmit_bpdu(bs, bp);
|
|
bp->bp_tc_ack = 0;
|
|
break;
|
|
|
|
case BSTP_ROLE_ROOT:
|
|
bstp_transmit_tcn(bs, bp);
|
|
break;
|
|
}
|
|
}
|
|
bstp_timer_start(&bp->bp_hello_timer, bp->bp_desg_htime);
|
|
bp->bp_flags &= ~BSTP_PORT_NEWINFO;
|
|
}
|
|
|
|
void
|
|
bstp_transmit_bpdu(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
struct bstp_cbpdu bpdu;
|
|
|
|
bpdu.cbu_rootpri = htons(bp->bp_desg_pv.pv_root_id >> 48);
|
|
PV2ADDR(bp->bp_desg_pv.pv_root_id, bpdu.cbu_rootaddr);
|
|
|
|
bpdu.cbu_rootpathcost = htonl(bp->bp_desg_pv.pv_cost);
|
|
|
|
bpdu.cbu_bridgepri = htons(bp->bp_desg_pv.pv_dbridge_id >> 48);
|
|
PV2ADDR(bp->bp_desg_pv.pv_dbridge_id, bpdu.cbu_bridgeaddr);
|
|
|
|
bpdu.cbu_portid = htons(bp->bp_port_id);
|
|
bpdu.cbu_messageage = htons(bp->bp_desg_msg_age);
|
|
bpdu.cbu_maxage = htons(bp->bp_desg_max_age);
|
|
bpdu.cbu_hellotime = htons(bp->bp_desg_htime);
|
|
bpdu.cbu_forwarddelay = htons(bp->bp_desg_fdelay);
|
|
|
|
bpdu.cbu_flags = bstp_pdu_flags(bp);
|
|
|
|
switch (bp->bp_protover) {
|
|
case BSTP_PROTO_STP:
|
|
bpdu.cbu_bpdutype = BSTP_MSGTYPE_CFG;
|
|
break;
|
|
case BSTP_PROTO_RSTP:
|
|
bpdu.cbu_bpdutype = BSTP_MSGTYPE_RSTP;
|
|
break;
|
|
}
|
|
|
|
bstp_send_bpdu(bs, bp, &bpdu);
|
|
}
|
|
|
|
void
|
|
bstp_transmit_tcn(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
struct bstp_tbpdu bpdu;
|
|
struct ifnet *ifp;
|
|
struct ether_header *eh;
|
|
struct mbuf *m;
|
|
|
|
if ((ifp = if_get(bp->bp_ifindex)) == NULL)
|
|
return;
|
|
if ((ifp->if_flags & IFF_RUNNING) == 0)
|
|
goto rele;
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (m == NULL)
|
|
goto rele;
|
|
m->m_pkthdr.ph_ifidx = ifp->if_index;
|
|
m->m_pkthdr.len = sizeof(*eh) + sizeof(bpdu);
|
|
m->m_pkthdr.pf.prio = BSTP_IFQ_PRIO;
|
|
m->m_len = m->m_pkthdr.len;
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
bcopy(LLADDR(ifp->if_sadl), eh->ether_shost, ETHER_ADDR_LEN);
|
|
bcopy(bstp_etheraddr, eh->ether_dhost, ETHER_ADDR_LEN);
|
|
eh->ether_type = htons(sizeof(bpdu));
|
|
|
|
bpdu.tbu_ssap = bpdu.tbu_dsap = LLC_8021D_LSAP;
|
|
bpdu.tbu_ctl = LLC_UI;
|
|
bpdu.tbu_protoid = 0;
|
|
bpdu.tbu_protover = 0;
|
|
bpdu.tbu_bpdutype = BSTP_MSGTYPE_TCN;
|
|
bcopy(&bpdu, mtod(m, caddr_t) + sizeof(*eh), sizeof(bpdu));
|
|
|
|
bp->bp_txcount++;
|
|
if_enqueue(ifp, m);
|
|
rele:
|
|
if_put(ifp);
|
|
}
|
|
|
|
void
|
|
bstp_decode_bpdu(struct bstp_port *bp, struct bstp_cbpdu *cpdu,
|
|
struct bstp_config_unit *cu)
|
|
{
|
|
int flags;
|
|
|
|
cu->cu_pv.pv_root_id =
|
|
(((u_int64_t)ntohs(cpdu->cbu_rootpri)) << 48) |
|
|
(((u_int64_t)cpdu->cbu_rootaddr[0]) << 40) |
|
|
(((u_int64_t)cpdu->cbu_rootaddr[1]) << 32) |
|
|
(((u_int64_t)cpdu->cbu_rootaddr[2]) << 24) |
|
|
(((u_int64_t)cpdu->cbu_rootaddr[3]) << 16) |
|
|
(((u_int64_t)cpdu->cbu_rootaddr[4]) << 8) |
|
|
(((u_int64_t)cpdu->cbu_rootaddr[5]) << 0);
|
|
|
|
cu->cu_pv.pv_dbridge_id =
|
|
(((u_int64_t)ntohs(cpdu->cbu_bridgepri)) << 48) |
|
|
(((u_int64_t)cpdu->cbu_bridgeaddr[0]) << 40) |
|
|
(((u_int64_t)cpdu->cbu_bridgeaddr[1]) << 32) |
|
|
(((u_int64_t)cpdu->cbu_bridgeaddr[2]) << 24) |
|
|
(((u_int64_t)cpdu->cbu_bridgeaddr[3]) << 16) |
|
|
(((u_int64_t)cpdu->cbu_bridgeaddr[4]) << 8) |
|
|
(((u_int64_t)cpdu->cbu_bridgeaddr[5]) << 0);
|
|
|
|
cu->cu_pv.pv_cost = ntohl(cpdu->cbu_rootpathcost);
|
|
cu->cu_message_age = ntohs(cpdu->cbu_messageage);
|
|
cu->cu_max_age = ntohs(cpdu->cbu_maxage);
|
|
cu->cu_hello_time = ntohs(cpdu->cbu_hellotime);
|
|
cu->cu_forward_delay = ntohs(cpdu->cbu_forwarddelay);
|
|
cu->cu_pv.pv_dport_id = ntohs(cpdu->cbu_portid);
|
|
cu->cu_pv.pv_port_id = bp->bp_port_id;
|
|
cu->cu_message_type = cpdu->cbu_bpdutype;
|
|
|
|
/* Strip off unused flags in STP mode */
|
|
flags = cpdu->cbu_flags;
|
|
switch (cpdu->cbu_protover) {
|
|
case BSTP_PROTO_STP:
|
|
flags &= BSTP_PDU_STPMASK;
|
|
/* A STP BPDU explicitly conveys a Designated Port */
|
|
cu->cu_role = BSTP_ROLE_DESIGNATED;
|
|
break;
|
|
case BSTP_PROTO_RSTP:
|
|
flags &= BSTP_PDU_RSTPMASK;
|
|
break;
|
|
}
|
|
|
|
cu->cu_topology_change_ack =
|
|
(flags & BSTP_PDU_F_TCA) ? 1 : 0;
|
|
cu->cu_proposal =
|
|
(flags & BSTP_PDU_F_P) ? 1 : 0;
|
|
cu->cu_agree =
|
|
(flags & BSTP_PDU_F_A) ? 1 : 0;
|
|
cu->cu_learning =
|
|
(flags & BSTP_PDU_F_L) ? 1 : 0;
|
|
cu->cu_forwarding =
|
|
(flags & BSTP_PDU_F_F) ? 1 : 0;
|
|
cu->cu_topology_change =
|
|
(flags & BSTP_PDU_F_TC) ? 1 : 0;
|
|
|
|
switch ((flags & BSTP_PDU_PRMASK) >> BSTP_PDU_PRSHIFT) {
|
|
case BSTP_PDU_F_ROOT:
|
|
cu->cu_role = BSTP_ROLE_ROOT;
|
|
break;
|
|
case BSTP_PDU_F_ALT:
|
|
cu->cu_role = BSTP_ROLE_ALTERNATE;
|
|
break;
|
|
case BSTP_PDU_F_DESG:
|
|
cu->cu_role = BSTP_ROLE_DESIGNATED;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_send_bpdu(struct bstp_state *bs, struct bstp_port *bp,
|
|
struct bstp_cbpdu *bpdu)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct mbuf *m;
|
|
struct ether_header *eh;
|
|
int s;
|
|
|
|
s = splnet();
|
|
if ((ifp = if_get(bp->bp_ifindex)) == NULL)
|
|
goto done;
|
|
if ((ifp->if_flags & IFF_RUNNING) == 0)
|
|
goto rele;
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (m == NULL)
|
|
goto rele;
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
|
|
bpdu->cbu_ssap = bpdu->cbu_dsap = LLC_8021D_LSAP;
|
|
bpdu->cbu_ctl = LLC_UI;
|
|
bpdu->cbu_protoid = htons(BSTP_PROTO_ID);
|
|
|
|
memcpy(eh->ether_shost, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
|
|
memcpy(eh->ether_dhost, bstp_etheraddr, ETHER_ADDR_LEN);
|
|
|
|
switch (bpdu->cbu_bpdutype) {
|
|
case BSTP_MSGTYPE_CFG:
|
|
bpdu->cbu_protover = BSTP_PROTO_STP;
|
|
m->m_pkthdr.len = sizeof(*eh) + BSTP_BPDU_STP_LEN;
|
|
eh->ether_type = htons(BSTP_BPDU_STP_LEN);
|
|
memcpy(mtod(m, caddr_t) + sizeof(*eh), bpdu,
|
|
BSTP_BPDU_STP_LEN);
|
|
break;
|
|
case BSTP_MSGTYPE_RSTP:
|
|
bpdu->cbu_protover = BSTP_PROTO_RSTP;
|
|
bpdu->cbu_versionlen = htons(0);
|
|
m->m_pkthdr.len = sizeof(*eh) + BSTP_BPDU_RSTP_LEN;
|
|
eh->ether_type = htons(BSTP_BPDU_RSTP_LEN);
|
|
memcpy(mtod(m, caddr_t) + sizeof(*eh), bpdu,
|
|
BSTP_BPDU_RSTP_LEN);
|
|
break;
|
|
default:
|
|
panic("not implemented");
|
|
}
|
|
m->m_pkthdr.ph_ifidx = ifp->if_index;
|
|
m->m_len = m->m_pkthdr.len;
|
|
m->m_pkthdr.pf.prio = BSTP_IFQ_PRIO;
|
|
|
|
bp->bp_txcount++;
|
|
if_enqueue(ifp, m);
|
|
rele:
|
|
if_put(ifp);
|
|
done:
|
|
splx(s);
|
|
}
|
|
|
|
int
|
|
bstp_pdu_flags(struct bstp_port *bp)
|
|
{
|
|
int flags = 0;
|
|
|
|
if (bp->bp_proposing && bp->bp_state != BSTP_IFSTATE_FORWARDING)
|
|
flags |= BSTP_PDU_F_P;
|
|
|
|
if (bp->bp_agree)
|
|
flags |= BSTP_PDU_F_A;
|
|
|
|
if (bp->bp_tc_timer.active)
|
|
flags |= BSTP_PDU_F_TC;
|
|
|
|
if (bp->bp_tc_ack)
|
|
flags |= BSTP_PDU_F_TCA;
|
|
|
|
switch (bp->bp_state) {
|
|
case BSTP_IFSTATE_LEARNING:
|
|
flags |= BSTP_PDU_F_L;
|
|
break;
|
|
case BSTP_IFSTATE_FORWARDING:
|
|
flags |= (BSTP_PDU_F_L | BSTP_PDU_F_F);
|
|
break;
|
|
}
|
|
|
|
switch (bp->bp_role) {
|
|
case BSTP_ROLE_ROOT:
|
|
flags |= (BSTP_PDU_F_ROOT << BSTP_PDU_PRSHIFT);
|
|
break;
|
|
case BSTP_ROLE_ALTERNATE:
|
|
case BSTP_ROLE_BACKUP:
|
|
flags |= (BSTP_PDU_F_ALT << BSTP_PDU_PRSHIFT);
|
|
break;
|
|
case BSTP_ROLE_DESIGNATED:
|
|
flags |= (BSTP_PDU_F_DESG << BSTP_PDU_PRSHIFT);
|
|
break;
|
|
}
|
|
|
|
/* Strip off unused flags in either mode */
|
|
switch (bp->bp_protover) {
|
|
case BSTP_PROTO_STP:
|
|
flags &= BSTP_PDU_STPMASK;
|
|
break;
|
|
case BSTP_PROTO_RSTP:
|
|
flags &= BSTP_PDU_RSTPMASK;
|
|
break;
|
|
}
|
|
return (flags);
|
|
}
|
|
|
|
struct mbuf *
|
|
bstp_input(struct bstp_state *bs, struct bstp_port *bp,
|
|
struct ether_header *eh, struct mbuf *m)
|
|
{
|
|
struct bstp_tbpdu tpdu;
|
|
u_int16_t len;
|
|
|
|
if (bs == NULL || bp == NULL || bp->bp_active == 0)
|
|
return (m);
|
|
|
|
len = ntohs(eh->ether_type);
|
|
if (len < sizeof(tpdu))
|
|
goto out;
|
|
|
|
m_adj(m, ETHER_HDR_LEN);
|
|
|
|
if (m->m_pkthdr.len > len)
|
|
m_adj(m, len - m->m_pkthdr.len);
|
|
if ((m = m_pullup(m, sizeof(tpdu))) == NULL)
|
|
goto out;
|
|
bcopy(mtod(m, struct tpdu *), &tpdu, sizeof(tpdu));
|
|
|
|
if (tpdu.tbu_dsap != LLC_8021D_LSAP ||
|
|
tpdu.tbu_ssap != LLC_8021D_LSAP ||
|
|
tpdu.tbu_ctl != LLC_UI)
|
|
goto out;
|
|
if (tpdu.tbu_protoid != BSTP_PROTO_ID)
|
|
goto out;
|
|
|
|
/*
|
|
* We can treat later versions of the PDU as the same as the maximum
|
|
* version we implement. All additional parameters/flags are ignored.
|
|
*/
|
|
if (tpdu.tbu_protover > BSTP_PROTO_MAX)
|
|
tpdu.tbu_protover = BSTP_PROTO_MAX;
|
|
|
|
if (tpdu.tbu_protover != bp->bp_protover) {
|
|
/*
|
|
* Wait for the migration delay timer to expire before changing
|
|
* protocol version to avoid flip-flops.
|
|
*/
|
|
if (bp->bp_flags & BSTP_PORT_CANMIGRATE)
|
|
bstp_set_port_proto(bp, tpdu.tbu_protover);
|
|
else
|
|
goto out;
|
|
}
|
|
|
|
/* Clear operedge upon receiving a PDU on the port */
|
|
bp->bp_operedge = 0;
|
|
bstp_timer_start(&bp->bp_edge_delay_timer,
|
|
BSTP_DEFAULT_MIGRATE_DELAY);
|
|
|
|
switch (tpdu.tbu_protover) {
|
|
case BSTP_PROTO_STP:
|
|
bstp_received_stp(bs, bp, &m, &tpdu);
|
|
break;
|
|
case BSTP_PROTO_RSTP:
|
|
bstp_received_rstp(bs, bp, &m, &tpdu);
|
|
break;
|
|
}
|
|
out:
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
bstp_received_stp(struct bstp_state *bs, struct bstp_port *bp,
|
|
struct mbuf **mp, struct bstp_tbpdu *tpdu)
|
|
{
|
|
struct bstp_cbpdu cpdu;
|
|
struct bstp_config_unit *cu = &bp->bp_msg_cu;
|
|
struct bstp_tcn_unit tu;
|
|
|
|
switch (tpdu->tbu_bpdutype) {
|
|
case BSTP_MSGTYPE_TCN:
|
|
tu.tu_message_type = tpdu->tbu_bpdutype;
|
|
bstp_received_tcn(bs, bp, &tu);
|
|
break;
|
|
case BSTP_MSGTYPE_CFG:
|
|
if ((*mp)->m_len < BSTP_BPDU_STP_LEN &&
|
|
(*mp = m_pullup(*mp, BSTP_BPDU_STP_LEN)) == NULL)
|
|
return;
|
|
memcpy(&cpdu, mtod(*mp, caddr_t), BSTP_BPDU_STP_LEN);
|
|
|
|
bstp_decode_bpdu(bp, &cpdu, cu);
|
|
bstp_received_bpdu(bs, bp, cu);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_received_rstp(struct bstp_state *bs, struct bstp_port *bp,
|
|
struct mbuf **mp, struct bstp_tbpdu *tpdu)
|
|
{
|
|
struct bstp_cbpdu cpdu;
|
|
struct bstp_config_unit *cu = &bp->bp_msg_cu;
|
|
|
|
if (tpdu->tbu_bpdutype != BSTP_MSGTYPE_RSTP)
|
|
return;
|
|
|
|
if ((*mp)->m_len < BSTP_BPDU_RSTP_LEN &&
|
|
(*mp = m_pullup(*mp, BSTP_BPDU_RSTP_LEN)) == NULL)
|
|
return;
|
|
memcpy(&cpdu, mtod(*mp, caddr_t), BSTP_BPDU_RSTP_LEN);
|
|
|
|
bstp_decode_bpdu(bp, &cpdu, cu);
|
|
bstp_received_bpdu(bs, bp, cu);
|
|
}
|
|
|
|
void
|
|
bstp_received_tcn(struct bstp_state *bs, struct bstp_port *bp,
|
|
struct bstp_tcn_unit *tcn)
|
|
{
|
|
bp->bp_rcvdtcn = 1;
|
|
bstp_update_tc(bp);
|
|
}
|
|
|
|
void
|
|
bstp_received_bpdu(struct bstp_state *bs, struct bstp_port *bp,
|
|
struct bstp_config_unit *cu)
|
|
{
|
|
int type;
|
|
|
|
/* We need to have transitioned to INFO_MINE before proceeding */
|
|
switch (bp->bp_infois) {
|
|
case BSTP_INFO_DISABLED:
|
|
case BSTP_INFO_AGED:
|
|
return;
|
|
}
|
|
|
|
type = bstp_pdu_rcvtype(bp, cu);
|
|
|
|
switch (type) {
|
|
case BSTP_PDU_SUPERIOR:
|
|
bs->bs_allsynced = 0;
|
|
bp->bp_agreed = 0;
|
|
bp->bp_proposing = 0;
|
|
|
|
if (cu->cu_proposal && cu->cu_forwarding == 0)
|
|
bp->bp_proposed = 1;
|
|
if (cu->cu_topology_change)
|
|
bp->bp_rcvdtc = 1;
|
|
if (cu->cu_topology_change_ack)
|
|
bp->bp_rcvdtca = 1;
|
|
|
|
if (bp->bp_agree &&
|
|
!bstp_pdu_bettersame(bp, BSTP_INFO_RECEIVED))
|
|
bp->bp_agree = 0;
|
|
|
|
/* copy the received priority and timers to the port */
|
|
bp->bp_port_pv = cu->cu_pv;
|
|
bp->bp_port_msg_age = cu->cu_message_age;
|
|
bp->bp_port_max_age = cu->cu_max_age;
|
|
bp->bp_port_fdelay = cu->cu_forward_delay;
|
|
bp->bp_port_htime =
|
|
(cu->cu_hello_time > BSTP_MIN_HELLO_TIME ?
|
|
cu->cu_hello_time : BSTP_MIN_HELLO_TIME);
|
|
|
|
/* set expiry for the new info */
|
|
bstp_set_timer_msgage(bp);
|
|
|
|
bp->bp_infois = BSTP_INFO_RECEIVED;
|
|
bstp_assign_roles(bs);
|
|
break;
|
|
|
|
case BSTP_PDU_REPEATED:
|
|
if (cu->cu_proposal && cu->cu_forwarding == 0)
|
|
bp->bp_proposed = 1;
|
|
if (cu->cu_topology_change)
|
|
bp->bp_rcvdtc = 1;
|
|
if (cu->cu_topology_change_ack)
|
|
bp->bp_rcvdtca = 1;
|
|
|
|
/* rearm the age timer */
|
|
bstp_set_timer_msgage(bp);
|
|
break;
|
|
|
|
case BSTP_PDU_INFERIOR:
|
|
if (cu->cu_learning) {
|
|
bp->bp_agreed = 1;
|
|
bp->bp_proposing = 0;
|
|
}
|
|
break;
|
|
|
|
case BSTP_PDU_INFERIORALT:
|
|
/*
|
|
* only point to point links are allowed fast
|
|
* transitions to forwarding.
|
|
*/
|
|
if (cu->cu_agree && bp->bp_ptp_link) {
|
|
bp->bp_agreed = 1;
|
|
bp->bp_proposing = 0;
|
|
} else
|
|
bp->bp_agreed = 0;
|
|
|
|
if (cu->cu_topology_change)
|
|
bp->bp_rcvdtc = 1;
|
|
if (cu->cu_topology_change_ack)
|
|
bp->bp_rcvdtca = 1;
|
|
break;
|
|
|
|
case BSTP_PDU_OTHER:
|
|
return; /* do nothing */
|
|
}
|
|
|
|
/* update the state machines with the new data */
|
|
bstp_update_state(bs, bp);
|
|
}
|
|
|
|
int
|
|
bstp_pdu_rcvtype(struct bstp_port *bp, struct bstp_config_unit *cu)
|
|
{
|
|
int type;
|
|
|
|
/* default return type */
|
|
type = BSTP_PDU_OTHER;
|
|
|
|
switch (cu->cu_role) {
|
|
case BSTP_ROLE_DESIGNATED:
|
|
if (bstp_info_superior(&bp->bp_port_pv, &cu->cu_pv))
|
|
/* bpdu priority is superior */
|
|
type = BSTP_PDU_SUPERIOR;
|
|
else if (bstp_info_cmp(&bp->bp_port_pv, &cu->cu_pv) ==
|
|
INFO_SAME) {
|
|
if (bp->bp_port_msg_age != cu->cu_message_age ||
|
|
bp->bp_port_max_age != cu->cu_max_age ||
|
|
bp->bp_port_fdelay != cu->cu_forward_delay ||
|
|
bp->bp_port_htime != cu->cu_hello_time)
|
|
/* bpdu priority is equal and timers differ */
|
|
type = BSTP_PDU_SUPERIOR;
|
|
else
|
|
/* bpdu is equal */
|
|
type = BSTP_PDU_REPEATED;
|
|
} else
|
|
/* bpdu priority is worse */
|
|
type = BSTP_PDU_INFERIOR;
|
|
|
|
break;
|
|
|
|
case BSTP_ROLE_ROOT:
|
|
case BSTP_ROLE_ALTERNATE:
|
|
case BSTP_ROLE_BACKUP:
|
|
if (bstp_info_cmp(&bp->bp_port_pv, &cu->cu_pv) <= INFO_SAME)
|
|
/*
|
|
* not a designated port and priority is the same or
|
|
* worse
|
|
*/
|
|
type = BSTP_PDU_INFERIORALT;
|
|
break;
|
|
}
|
|
|
|
return (type);
|
|
}
|
|
|
|
int
|
|
bstp_pdu_bettersame(struct bstp_port *bp, int newinfo)
|
|
{
|
|
if (newinfo == BSTP_INFO_RECEIVED &&
|
|
bp->bp_infois == BSTP_INFO_RECEIVED &&
|
|
bstp_info_cmp(&bp->bp_port_pv, &bp->bp_msg_cu.cu_pv) >= INFO_SAME)
|
|
return (1);
|
|
|
|
if (newinfo == BSTP_INFO_MINE &&
|
|
bp->bp_infois == BSTP_INFO_MINE &&
|
|
bstp_info_cmp(&bp->bp_port_pv, &bp->bp_desg_pv) >= INFO_SAME)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bstp_info_cmp(struct bstp_pri_vector *pv,
|
|
struct bstp_pri_vector *cpv)
|
|
{
|
|
if (cpv->pv_root_id < pv->pv_root_id)
|
|
return (INFO_BETTER);
|
|
if (cpv->pv_root_id > pv->pv_root_id)
|
|
return (INFO_WORSE);
|
|
|
|
if (cpv->pv_cost < pv->pv_cost)
|
|
return (INFO_BETTER);
|
|
if (cpv->pv_cost > pv->pv_cost)
|
|
return (INFO_WORSE);
|
|
|
|
if (cpv->pv_dbridge_id < pv->pv_dbridge_id)
|
|
return (INFO_BETTER);
|
|
if (cpv->pv_dbridge_id > pv->pv_dbridge_id)
|
|
return (INFO_WORSE);
|
|
|
|
if (cpv->pv_dport_id < pv->pv_dport_id)
|
|
return (INFO_BETTER);
|
|
if (cpv->pv_dport_id > pv->pv_dport_id)
|
|
return (INFO_WORSE);
|
|
|
|
return (INFO_SAME);
|
|
}
|
|
|
|
/*
|
|
* This message priority vector is superior to the port priority vector and
|
|
* will replace it if, and only if, the message priority vector is better than
|
|
* the port priority vector, or the message has been transmitted from the same
|
|
* designated bridge and designated port as the port priority vector.
|
|
*/
|
|
int
|
|
bstp_info_superior(struct bstp_pri_vector *pv,
|
|
struct bstp_pri_vector *cpv)
|
|
{
|
|
if (bstp_info_cmp(pv, cpv) == INFO_BETTER ||
|
|
(bstp_same_bridgeid(pv->pv_dbridge_id, cpv->pv_dbridge_id) &&
|
|
(cpv->pv_dport_id & 0xfff) == (pv->pv_dport_id & 0xfff)))
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
bstp_reset(struct bstp_state *bs)
|
|
{
|
|
/* default to our priority vector */
|
|
bs->bs_root_pv = bs->bs_bridge_pv;
|
|
bs->bs_root_msg_age = 0;
|
|
bs->bs_root_max_age = bs->bs_bridge_max_age;
|
|
bs->bs_root_fdelay = bs->bs_bridge_fdelay;
|
|
bs->bs_root_htime = bs->bs_bridge_htime;
|
|
bs->bs_root_port = NULL;
|
|
}
|
|
|
|
void
|
|
bstp_assign_roles(struct bstp_state *bs)
|
|
{
|
|
struct bstp_port *bp, *rbp = NULL;
|
|
struct bstp_pri_vector pv;
|
|
|
|
bstp_reset(bs);
|
|
|
|
/* check if any received info supersedes us */
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
if (bp->bp_infois != BSTP_INFO_RECEIVED)
|
|
continue;
|
|
|
|
pv = bp->bp_port_pv;
|
|
pv.pv_cost += bp->bp_path_cost;
|
|
|
|
/*
|
|
* The root priority vector is the best of the set comprising
|
|
* the bridge priority vector plus all root path priority
|
|
* vectors whose bridge address is not equal to us.
|
|
*/
|
|
if (bstp_same_bridgeid(pv.pv_dbridge_id,
|
|
bs->bs_bridge_pv.pv_dbridge_id) == 0 &&
|
|
bstp_info_cmp(&bs->bs_root_pv, &pv) == INFO_BETTER) {
|
|
/* the port vector replaces the root */
|
|
bs->bs_root_pv = pv;
|
|
bs->bs_root_msg_age = bp->bp_port_msg_age +
|
|
BSTP_MESSAGE_AGE_INCR;
|
|
bs->bs_root_max_age = bp->bp_port_max_age;
|
|
bs->bs_root_fdelay = bp->bp_port_fdelay;
|
|
bs->bs_root_htime = bp->bp_port_htime;
|
|
rbp = bp;
|
|
}
|
|
}
|
|
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
/* calculate the port designated vector */
|
|
bp->bp_desg_pv.pv_root_id = bs->bs_root_pv.pv_root_id;
|
|
bp->bp_desg_pv.pv_cost = bs->bs_root_pv.pv_cost;
|
|
bp->bp_desg_pv.pv_dbridge_id = bs->bs_bridge_pv.pv_dbridge_id;
|
|
bp->bp_desg_pv.pv_dport_id = bp->bp_port_id;
|
|
bp->bp_desg_pv.pv_port_id = bp->bp_port_id;
|
|
|
|
/* calculate designated times */
|
|
bp->bp_desg_msg_age = bs->bs_root_msg_age;
|
|
bp->bp_desg_max_age = bs->bs_root_max_age;
|
|
bp->bp_desg_fdelay = bs->bs_root_fdelay;
|
|
bp->bp_desg_htime = bs->bs_bridge_htime;
|
|
|
|
|
|
switch (bp->bp_infois) {
|
|
case BSTP_INFO_DISABLED:
|
|
bstp_set_port_role(bp, BSTP_ROLE_DISABLED);
|
|
break;
|
|
|
|
case BSTP_INFO_AGED:
|
|
bstp_set_port_role(bp, BSTP_ROLE_DESIGNATED);
|
|
bstp_update_info(bp);
|
|
break;
|
|
|
|
case BSTP_INFO_MINE:
|
|
bstp_set_port_role(bp, BSTP_ROLE_DESIGNATED);
|
|
/* update the port info if stale */
|
|
if (bstp_info_cmp(&bp->bp_port_pv,
|
|
&bp->bp_desg_pv) != INFO_SAME ||
|
|
(rbp != NULL &&
|
|
(bp->bp_port_msg_age != rbp->bp_port_msg_age ||
|
|
bp->bp_port_max_age != rbp->bp_port_max_age ||
|
|
bp->bp_port_fdelay != rbp->bp_port_fdelay ||
|
|
bp->bp_port_htime != rbp->bp_port_htime)))
|
|
bstp_update_info(bp);
|
|
break;
|
|
|
|
case BSTP_INFO_RECEIVED:
|
|
if (bp == rbp) {
|
|
/*
|
|
* root priority is derived from this
|
|
* port, make it the root port.
|
|
*/
|
|
bstp_set_port_role(bp, BSTP_ROLE_ROOT);
|
|
bs->bs_root_port = bp;
|
|
} else if (bstp_info_cmp(&bp->bp_port_pv,
|
|
&bp->bp_desg_pv) == INFO_BETTER) {
|
|
/*
|
|
* the port priority is lower than the root
|
|
* port.
|
|
*/
|
|
bstp_set_port_role(bp, BSTP_ROLE_DESIGNATED);
|
|
bstp_update_info(bp);
|
|
} else {
|
|
if (bstp_same_bridgeid(
|
|
bp->bp_port_pv.pv_dbridge_id,
|
|
bs->bs_bridge_pv.pv_dbridge_id)) {
|
|
/*
|
|
* the designated bridge refers to
|
|
* another port on this bridge.
|
|
*/
|
|
bstp_set_port_role(bp,
|
|
BSTP_ROLE_BACKUP);
|
|
} else {
|
|
/*
|
|
* the port is an inferior path to the
|
|
* root bridge.
|
|
*/
|
|
bstp_set_port_role(bp,
|
|
BSTP_ROLE_ALTERNATE);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_update_state(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
struct bstp_port *bp2;
|
|
int synced;
|
|
|
|
/* check if all the ports have synchronized again */
|
|
if (!bs->bs_allsynced) {
|
|
synced = 1;
|
|
LIST_FOREACH(bp2, &bs->bs_bplist, bp_next) {
|
|
if (!(bp2->bp_synced ||
|
|
bp2->bp_role == BSTP_ROLE_ROOT)) {
|
|
synced = 0;
|
|
break;
|
|
}
|
|
}
|
|
bs->bs_allsynced = synced;
|
|
}
|
|
|
|
bstp_update_roles(bs, bp);
|
|
bstp_update_tc(bp);
|
|
}
|
|
|
|
void
|
|
bstp_update_roles(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
switch (bp->bp_role) {
|
|
case BSTP_ROLE_DISABLED:
|
|
/* Clear any flags if set */
|
|
if (bp->bp_sync || !bp->bp_synced || bp->bp_reroot) {
|
|
bp->bp_sync = 0;
|
|
bp->bp_synced = 1;
|
|
bp->bp_reroot = 0;
|
|
}
|
|
break;
|
|
|
|
case BSTP_ROLE_ALTERNATE:
|
|
case BSTP_ROLE_BACKUP:
|
|
if ((bs->bs_allsynced && !bp->bp_agree) ||
|
|
(bp->bp_proposed && bp->bp_agree)) {
|
|
bp->bp_proposed = 0;
|
|
bp->bp_agree = 1;
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
DPRINTF(bp, "-> ALTERNATE_AGREED\n");
|
|
}
|
|
|
|
if (bp->bp_proposed && !bp->bp_agree) {
|
|
bstp_set_all_sync(bs);
|
|
bp->bp_proposed = 0;
|
|
DPRINTF(bp, "-> ALTERNATE_PROPOSED\n");
|
|
}
|
|
|
|
/* Clear any flags if set */
|
|
if (bp->bp_sync || !bp->bp_synced || bp->bp_reroot) {
|
|
bp->bp_sync = 0;
|
|
bp->bp_synced = 1;
|
|
bp->bp_reroot = 0;
|
|
DPRINTF(bp, "-> ALTERNATE_PORT\n");
|
|
}
|
|
break;
|
|
|
|
case BSTP_ROLE_ROOT:
|
|
if (bp->bp_state != BSTP_IFSTATE_FORWARDING && !bp->bp_reroot) {
|
|
bstp_set_all_reroot(bs);
|
|
DPRINTF(bp, "-> ROOT_REROOT\n");
|
|
}
|
|
|
|
if ((bs->bs_allsynced && !bp->bp_agree) ||
|
|
(bp->bp_proposed && bp->bp_agree)) {
|
|
bp->bp_proposed = 0;
|
|
bp->bp_sync = 0;
|
|
bp->bp_agree = 1;
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
DPRINTF(bp, "-> ROOT_AGREED\n");
|
|
}
|
|
|
|
if (bp->bp_proposed && !bp->bp_agree) {
|
|
bstp_set_all_sync(bs);
|
|
bp->bp_proposed = 0;
|
|
DPRINTF(bp, "-> ROOT_PROPOSED\n");
|
|
}
|
|
|
|
if (bp->bp_state != BSTP_IFSTATE_FORWARDING &&
|
|
(bp->bp_forward_delay_timer.active == 0 ||
|
|
(bstp_rerooted(bs, bp) &&
|
|
bp->bp_recent_backup_timer.active == 0 &&
|
|
bp->bp_protover == BSTP_PROTO_RSTP))) {
|
|
switch (bp->bp_state) {
|
|
case BSTP_IFSTATE_DISCARDING:
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_LEARNING);
|
|
break;
|
|
case BSTP_IFSTATE_LEARNING:
|
|
bstp_set_port_state(bp,
|
|
BSTP_IFSTATE_FORWARDING);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bp->bp_state == BSTP_IFSTATE_FORWARDING && bp->bp_reroot) {
|
|
bp->bp_reroot = 0;
|
|
DPRINTF(bp, "-> ROOT_REROOTED\n");
|
|
}
|
|
break;
|
|
|
|
case BSTP_ROLE_DESIGNATED:
|
|
if (bp->bp_recent_root_timer.active == 0 && bp->bp_reroot) {
|
|
bp->bp_reroot = 0;
|
|
DPRINTF(bp, "-> DESIGNATED_RETIRED\n");
|
|
}
|
|
|
|
if ((bp->bp_state == BSTP_IFSTATE_DISCARDING &&
|
|
!bp->bp_synced) || (bp->bp_agreed && !bp->bp_synced) ||
|
|
(bp->bp_operedge && !bp->bp_synced) ||
|
|
(bp->bp_sync && bp->bp_synced)) {
|
|
bstp_timer_stop(&bp->bp_recent_root_timer);
|
|
bp->bp_synced = 1;
|
|
bp->bp_sync = 0;
|
|
DPRINTF(bp, "-> DESIGNATED_SYNCED\n");
|
|
}
|
|
|
|
if (bp->bp_state != BSTP_IFSTATE_FORWARDING &&
|
|
!bp->bp_agreed && !bp->bp_proposing &&
|
|
!bp->bp_operedge) {
|
|
bp->bp_proposing = 1;
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
bstp_timer_start(&bp->bp_edge_delay_timer,
|
|
(bp->bp_ptp_link ? BSTP_DEFAULT_MIGRATE_DELAY :
|
|
bp->bp_desg_max_age));
|
|
DPRINTF(bp, "-> DESIGNATED_PROPOSE\n");
|
|
}
|
|
|
|
if (bp->bp_state != BSTP_IFSTATE_FORWARDING &&
|
|
(bp->bp_forward_delay_timer.active == 0 || bp->bp_agreed ||
|
|
bp->bp_operedge) &&
|
|
(bp->bp_recent_root_timer.active == 0 || !bp->bp_reroot) &&
|
|
!bp->bp_sync) {
|
|
if (bp->bp_agreed)
|
|
DPRINTF(bp, "-> AGREED\n");
|
|
/*
|
|
* If agreed|operedge then go straight to forwarding,
|
|
* otherwise follow discard -> learn -> forward.
|
|
*/
|
|
if (bp->bp_agreed || bp->bp_operedge ||
|
|
bp->bp_state == BSTP_IFSTATE_LEARNING) {
|
|
bstp_set_port_state(bp,
|
|
BSTP_IFSTATE_FORWARDING);
|
|
bp->bp_agreed = bp->bp_protover;
|
|
} else if (bp->bp_state == BSTP_IFSTATE_DISCARDING)
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_LEARNING);
|
|
}
|
|
|
|
if (((bp->bp_sync && !bp->bp_synced) ||
|
|
(bp->bp_reroot && bp->bp_recent_root_timer.active) ||
|
|
(bp->bp_flags & BSTP_PORT_DISPUTED)) && !bp->bp_operedge &&
|
|
bp->bp_state != BSTP_IFSTATE_DISCARDING) {
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
|
|
bp->bp_flags &= ~BSTP_PORT_DISPUTED;
|
|
bstp_timer_start(&bp->bp_forward_delay_timer,
|
|
bp->bp_protover == BSTP_PROTO_RSTP ?
|
|
bp->bp_desg_htime : bp->bp_desg_fdelay);
|
|
DPRINTF(bp, "-> DESIGNATED_DISCARD\n");
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (bp->bp_flags & BSTP_PORT_NEWINFO)
|
|
bstp_transmit(bs, bp);
|
|
}
|
|
|
|
void
|
|
bstp_update_tc(struct bstp_port *bp)
|
|
{
|
|
switch (bp->bp_tcstate) {
|
|
case BSTP_TCSTATE_ACTIVE:
|
|
if ((bp->bp_role != BSTP_ROLE_DESIGNATED &&
|
|
bp->bp_role != BSTP_ROLE_ROOT) || bp->bp_operedge)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_LEARNING);
|
|
|
|
if (bp->bp_rcvdtcn)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_TCN);
|
|
if (bp->bp_rcvdtc)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_TC);
|
|
|
|
if (bp->bp_tc_prop && !bp->bp_operedge)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_PROPAG);
|
|
|
|
if (bp->bp_rcvdtca)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_ACK);
|
|
break;
|
|
|
|
case BSTP_TCSTATE_INACTIVE:
|
|
if ((bp->bp_state == BSTP_IFSTATE_LEARNING ||
|
|
bp->bp_state == BSTP_IFSTATE_FORWARDING) &&
|
|
bp->bp_fdbflush == 0)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_LEARNING);
|
|
break;
|
|
|
|
case BSTP_TCSTATE_LEARNING:
|
|
if (bp->bp_rcvdtc || bp->bp_rcvdtcn || bp->bp_rcvdtca ||
|
|
bp->bp_tc_prop)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_LEARNING);
|
|
else if (bp->bp_role != BSTP_ROLE_DESIGNATED &&
|
|
bp->bp_role != BSTP_ROLE_ROOT &&
|
|
bp->bp_state == BSTP_IFSTATE_DISCARDING)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_INACTIVE);
|
|
|
|
if ((bp->bp_role == BSTP_ROLE_DESIGNATED ||
|
|
bp->bp_role == BSTP_ROLE_ROOT) &&
|
|
bp->bp_state == BSTP_IFSTATE_FORWARDING &&
|
|
!bp->bp_operedge)
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_DETECTED);
|
|
break;
|
|
|
|
/* these are transient states and go straight back to ACTIVE */
|
|
case BSTP_TCSTATE_DETECTED:
|
|
case BSTP_TCSTATE_TCN:
|
|
case BSTP_TCSTATE_TC:
|
|
case BSTP_TCSTATE_PROPAG:
|
|
case BSTP_TCSTATE_ACK:
|
|
DPRINTF(bp, "Invalid TC state\n");
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
void
|
|
bstp_update_info(struct bstp_port *bp)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
|
|
bp->bp_proposing = 0;
|
|
bp->bp_proposed = 0;
|
|
|
|
if (bp->bp_agreed && !bstp_pdu_bettersame(bp, BSTP_INFO_MINE))
|
|
bp->bp_agreed = 0;
|
|
|
|
if (bp->bp_synced && !bp->bp_agreed) {
|
|
bp->bp_synced = 0;
|
|
bs->bs_allsynced = 0;
|
|
}
|
|
|
|
/* copy the designated pv to the port */
|
|
bp->bp_port_pv = bp->bp_desg_pv;
|
|
bp->bp_port_msg_age = bp->bp_desg_msg_age;
|
|
bp->bp_port_max_age = bp->bp_desg_max_age;
|
|
bp->bp_port_fdelay = bp->bp_desg_fdelay;
|
|
bp->bp_port_htime = bp->bp_desg_htime;
|
|
bp->bp_infois = BSTP_INFO_MINE;
|
|
|
|
/* Set transmit flag but do not immediately send */
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
}
|
|
|
|
/* set tcprop on every port other than the caller */
|
|
void
|
|
bstp_set_other_tcprop(struct bstp_port *bp)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
struct bstp_port *bp2;
|
|
|
|
LIST_FOREACH(bp2, &bs->bs_bplist, bp_next) {
|
|
if (bp2 == bp)
|
|
continue;
|
|
bp2->bp_tc_prop = 1;
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_set_all_reroot(struct bstp_state *bs)
|
|
{
|
|
struct bstp_port *bp;
|
|
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
|
|
bp->bp_reroot = 1;
|
|
}
|
|
|
|
void
|
|
bstp_set_all_sync(struct bstp_state *bs)
|
|
{
|
|
struct bstp_port *bp;
|
|
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
bp->bp_sync = 1;
|
|
bp->bp_synced = 0; /* Not explicit in spec */
|
|
}
|
|
|
|
bs->bs_allsynced = 0;
|
|
}
|
|
|
|
void
|
|
bstp_set_port_state(struct bstp_port *bp, int state)
|
|
{
|
|
if (bp->bp_state == state)
|
|
return;
|
|
|
|
bp->bp_state = state;
|
|
|
|
switch (bp->bp_state) {
|
|
case BSTP_IFSTATE_DISCARDING:
|
|
DPRINTF(bp, "state changed to DISCARDING\n");
|
|
break;
|
|
|
|
case BSTP_IFSTATE_LEARNING:
|
|
DPRINTF(bp, "state changed to LEARNING\n");
|
|
bstp_timer_start(&bp->bp_forward_delay_timer,
|
|
bp->bp_protover == BSTP_PROTO_RSTP ?
|
|
bp->bp_desg_htime : bp->bp_desg_fdelay);
|
|
break;
|
|
|
|
case BSTP_IFSTATE_FORWARDING:
|
|
DPRINTF(bp, "state changed to FORWARDING\n");
|
|
bstp_timer_stop(&bp->bp_forward_delay_timer);
|
|
/* Record that we enabled forwarding */
|
|
bp->bp_forward_transitions++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_set_port_role(struct bstp_port *bp, int role)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
|
|
if (bp->bp_role == role)
|
|
return;
|
|
|
|
/* perform pre-change tasks */
|
|
switch (bp->bp_role) {
|
|
case BSTP_ROLE_DISABLED:
|
|
bstp_timer_start(&bp->bp_forward_delay_timer,
|
|
bp->bp_desg_max_age);
|
|
break;
|
|
|
|
case BSTP_ROLE_BACKUP:
|
|
bstp_timer_start(&bp->bp_recent_backup_timer,
|
|
bp->bp_desg_htime * 2);
|
|
/* FALLTHROUGH */
|
|
case BSTP_ROLE_ALTERNATE:
|
|
bstp_timer_start(&bp->bp_forward_delay_timer,
|
|
bp->bp_desg_fdelay);
|
|
bp->bp_sync = 0;
|
|
bp->bp_synced = 1;
|
|
bp->bp_reroot = 0;
|
|
break;
|
|
|
|
case BSTP_ROLE_ROOT:
|
|
bstp_timer_start(&bp->bp_recent_root_timer,
|
|
BSTP_DEFAULT_FORWARD_DELAY);
|
|
break;
|
|
}
|
|
|
|
bp->bp_role = role;
|
|
/* clear values not carried between roles */
|
|
bp->bp_proposing = 0;
|
|
bs->bs_allsynced = 0;
|
|
|
|
/* initialise the new role */
|
|
switch (bp->bp_role) {
|
|
case BSTP_ROLE_DISABLED:
|
|
case BSTP_ROLE_ALTERNATE:
|
|
case BSTP_ROLE_BACKUP:
|
|
DPRINTF(bp, "role -> ALT/BACK/DISABLED\n");
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
|
|
bstp_timer_stop(&bp->bp_recent_root_timer);
|
|
bstp_timer_latch(&bp->bp_forward_delay_timer);
|
|
bp->bp_sync = 0;
|
|
bp->bp_synced = 1;
|
|
bp->bp_reroot = 0;
|
|
break;
|
|
|
|
case BSTP_ROLE_ROOT:
|
|
DPRINTF(bp, "role -> ROOT\n");
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
|
|
bstp_timer_latch(&bp->bp_recent_root_timer);
|
|
bp->bp_proposing = 0;
|
|
break;
|
|
|
|
case BSTP_ROLE_DESIGNATED:
|
|
DPRINTF(bp, "role -> DESIGNATED\n");
|
|
bstp_timer_start(&bp->bp_hello_timer,
|
|
bp->bp_desg_htime);
|
|
bp->bp_agree = 0;
|
|
break;
|
|
}
|
|
|
|
/* let the TC state know that the role changed */
|
|
bstp_update_tc(bp);
|
|
}
|
|
|
|
void
|
|
bstp_set_port_proto(struct bstp_port *bp, int proto)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
|
|
/* supported protocol versions */
|
|
switch (proto) {
|
|
case BSTP_PROTO_STP:
|
|
/* we can downgrade protocols only */
|
|
bstp_timer_stop(&bp->bp_migrate_delay_timer);
|
|
/* clear unsupported features */
|
|
bp->bp_operedge = 0;
|
|
break;
|
|
|
|
case BSTP_PROTO_RSTP:
|
|
bstp_timer_start(&bp->bp_migrate_delay_timer,
|
|
bs->bs_migration_delay);
|
|
break;
|
|
|
|
default:
|
|
DPRINTF(bp, "Unsupported STP version %d\n", proto);
|
|
return;
|
|
}
|
|
|
|
bp->bp_protover = proto;
|
|
bp->bp_flags &= ~BSTP_PORT_CANMIGRATE;
|
|
}
|
|
|
|
void
|
|
bstp_set_port_tc(struct bstp_port *bp, int state)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
|
|
bp->bp_tcstate = state;
|
|
|
|
/* initialise the new state */
|
|
switch (bp->bp_tcstate) {
|
|
case BSTP_TCSTATE_ACTIVE:
|
|
DPRINTF(bp, "-> TC_ACTIVE\n");
|
|
/* nothing to do */
|
|
break;
|
|
|
|
case BSTP_TCSTATE_INACTIVE:
|
|
bstp_timer_stop(&bp->bp_tc_timer);
|
|
/* flush routes on the parent bridge */
|
|
bp->bp_fdbflush = 1;
|
|
bstp_notify_rtage(bp, 0);
|
|
bp->bp_tc_ack = 0;
|
|
DPRINTF(bp, "-> TC_INACTIVE\n");
|
|
break;
|
|
|
|
case BSTP_TCSTATE_LEARNING:
|
|
bp->bp_rcvdtc = 0;
|
|
bp->bp_rcvdtcn = 0;
|
|
bp->bp_rcvdtca = 0;
|
|
bp->bp_tc_prop = 0;
|
|
DPRINTF(bp, "-> TC_LEARNING\n");
|
|
break;
|
|
|
|
case BSTP_TCSTATE_DETECTED:
|
|
bstp_set_timer_tc(bp);
|
|
bstp_set_other_tcprop(bp);
|
|
/* send out notification */
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
bstp_transmit(bs, bp);
|
|
getmicrotime(&bs->bs_last_tc_time);
|
|
DPRINTF(bp, "-> TC_DETECTED\n");
|
|
bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
|
|
break;
|
|
|
|
case BSTP_TCSTATE_TCN:
|
|
bstp_set_timer_tc(bp);
|
|
DPRINTF(bp, "-> TC_TCN\n");
|
|
/* FALLTHROUGH */
|
|
case BSTP_TCSTATE_TC:
|
|
bp->bp_rcvdtc = 0;
|
|
bp->bp_rcvdtcn = 0;
|
|
if (bp->bp_role == BSTP_ROLE_DESIGNATED)
|
|
bp->bp_tc_ack = 1;
|
|
|
|
bstp_set_other_tcprop(bp);
|
|
DPRINTF(bp, "-> TC_TC\n");
|
|
bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
|
|
break;
|
|
|
|
case BSTP_TCSTATE_PROPAG:
|
|
/* flush routes on the parent bridge */
|
|
bp->bp_fdbflush = 1;
|
|
bstp_notify_rtage(bp, 0);
|
|
bp->bp_tc_prop = 0;
|
|
bstp_set_timer_tc(bp);
|
|
DPRINTF(bp, "-> TC_PROPAG\n");
|
|
bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
|
|
break;
|
|
|
|
case BSTP_TCSTATE_ACK:
|
|
bstp_timer_stop(&bp->bp_tc_timer);
|
|
bp->bp_rcvdtca = 0;
|
|
DPRINTF(bp, "-> TC_ACK\n");
|
|
bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_set_timer_tc(struct bstp_port *bp)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
|
|
if (bp->bp_tc_timer.active)
|
|
return;
|
|
|
|
switch (bp->bp_protover) {
|
|
case BSTP_PROTO_RSTP:
|
|
bstp_timer_start(&bp->bp_tc_timer,
|
|
bp->bp_desg_htime + BSTP_TICK_VAL);
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
break;
|
|
case BSTP_PROTO_STP:
|
|
bstp_timer_start(&bp->bp_tc_timer,
|
|
bs->bs_root_max_age + bs->bs_root_fdelay);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_set_timer_msgage(struct bstp_port *bp)
|
|
{
|
|
if (bp->bp_port_msg_age + BSTP_MESSAGE_AGE_INCR <=
|
|
bp->bp_port_max_age) {
|
|
bstp_timer_start(&bp->bp_message_age_timer,
|
|
bp->bp_port_htime * 3);
|
|
} else
|
|
/* expires immediately */
|
|
bstp_timer_start(&bp->bp_message_age_timer, 0);
|
|
}
|
|
|
|
int
|
|
bstp_rerooted(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
struct bstp_port *bp2;
|
|
int rr_set = 0;
|
|
|
|
LIST_FOREACH(bp2, &bs->bs_bplist, bp_next) {
|
|
if (bp2 == bp)
|
|
continue;
|
|
if (bp2->bp_recent_root_timer.active) {
|
|
rr_set = 1;
|
|
break;
|
|
}
|
|
}
|
|
return (!rr_set);
|
|
}
|
|
|
|
/*
|
|
* Calculate the path cost according to the link speed.
|
|
*/
|
|
u_int32_t
|
|
bstp_calc_path_cost(struct bstp_port *bp)
|
|
{
|
|
struct ifnet *ifp;
|
|
u_int32_t path_cost;
|
|
|
|
/* If the priority has been manually set then retain the value */
|
|
if (bp->bp_flags & BSTP_PORT_ADMCOST)
|
|
return bp->bp_path_cost;
|
|
|
|
if ((ifp = if_get(bp->bp_ifindex)) == NULL) {
|
|
return bp->bp_path_cost;
|
|
}
|
|
|
|
if (ifp->if_baudrate < 1000) {
|
|
if_put(ifp);
|
|
return (BSTP_DEFAULT_PATH_COST);
|
|
}
|
|
|
|
/* formula from section 17.14, IEEE Std 802.1D-2004 */
|
|
path_cost = 20000000000ULL / (ifp->if_baudrate / 1000);
|
|
if_put(ifp);
|
|
|
|
if (path_cost > BSTP_MAX_PATH_COST)
|
|
path_cost = BSTP_MAX_PATH_COST;
|
|
|
|
/* STP compat mode only uses 16 bits of the 32 */
|
|
if (bp->bp_protover == BSTP_PROTO_STP && path_cost > 65535)
|
|
path_cost = 65535;
|
|
|
|
return (path_cost);
|
|
}
|
|
|
|
void
|
|
bstp_notify_rtage(struct bstp_port *bp, int pending)
|
|
{
|
|
int age = 0;
|
|
|
|
KERNEL_ASSERT_LOCKED();
|
|
|
|
switch (bp->bp_protover) {
|
|
case BSTP_PROTO_STP:
|
|
/* convert to seconds */
|
|
age = bp->bp_desg_fdelay / BSTP_TICK_VAL;
|
|
break;
|
|
case BSTP_PROTO_RSTP:
|
|
age = 0;
|
|
break;
|
|
}
|
|
|
|
if (bp->bp_active == 1) {
|
|
struct ifnet *ifp;
|
|
|
|
if ((ifp = if_get(bp->bp_ifindex)) != NULL)
|
|
bridge_rtagenode(ifp, age);
|
|
if_put(ifp);
|
|
}
|
|
|
|
/* flush is complete */
|
|
bp->bp_fdbflush = 0;
|
|
}
|
|
|
|
void
|
|
bstp_ifstate(void *arg)
|
|
{
|
|
struct ifnet *ifp = (struct ifnet *)arg;
|
|
struct bridge_iflist *bif;
|
|
struct bstp_port *bp;
|
|
struct bstp_state *bs;
|
|
int s;
|
|
|
|
if (ifp->if_type == IFT_BRIDGE)
|
|
return;
|
|
|
|
s = splnet();
|
|
if ((bif = bridge_getbif(ifp)) == NULL)
|
|
goto done;
|
|
if ((bif->bif_flags & IFBIF_STP) == 0)
|
|
goto done;
|
|
if ((bp = bif->bif_stp) == NULL)
|
|
goto done;
|
|
if ((bs = bp->bp_bs) == NULL)
|
|
goto done;
|
|
|
|
/* update the link state */
|
|
bstp_ifupdstatus(bs, bp);
|
|
bstp_update_state(bs, bp);
|
|
done:
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
bstp_ifupdstatus(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
if ((ifp = if_get(bp->bp_ifindex)) == NULL)
|
|
return;
|
|
|
|
bp->bp_path_cost = bstp_calc_path_cost(bp);
|
|
|
|
if ((ifp->if_flags & IFF_UP) &&
|
|
ifp->if_link_state != LINK_STATE_DOWN) {
|
|
if (bp->bp_flags & BSTP_PORT_AUTOPTP) {
|
|
/* A full-duplex link is assumed to be ptp */
|
|
bp->bp_ptp_link = ifp->if_link_state ==
|
|
LINK_STATE_FULL_DUPLEX ? 1 : 0;
|
|
}
|
|
|
|
if (bp->bp_infois == BSTP_INFO_DISABLED)
|
|
bstp_enable_port(bs, bp);
|
|
} else {
|
|
if (bp->bp_infois != BSTP_INFO_DISABLED)
|
|
bstp_disable_port(bs, bp);
|
|
}
|
|
|
|
if_put(ifp);
|
|
}
|
|
|
|
void
|
|
bstp_enable_port(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
bp->bp_infois = BSTP_INFO_AGED;
|
|
bstp_assign_roles(bs);
|
|
}
|
|
|
|
void
|
|
bstp_disable_port(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
bp->bp_infois = BSTP_INFO_DISABLED;
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
|
|
bstp_assign_roles(bs);
|
|
}
|
|
|
|
void
|
|
bstp_tick(void *arg)
|
|
{
|
|
struct bstp_state *bs = (struct bstp_state *)arg;
|
|
struct ifnet *ifp;
|
|
struct bstp_port *bp;
|
|
int s;
|
|
|
|
if ((ifp = if_get(bs->bs_ifindex)) == NULL)
|
|
return;
|
|
|
|
s = splnet();
|
|
if ((ifp->if_flags & IFF_RUNNING) == 0) {
|
|
splx(s);
|
|
if_put(ifp);
|
|
return;
|
|
}
|
|
|
|
/* slow timer to catch missed link events */
|
|
if (bstp_timer_expired(&bs->bs_link_timer)) {
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
|
|
bstp_ifupdstatus(bs, bp);
|
|
bstp_timer_start(&bs->bs_link_timer, BSTP_LINK_TIMER);
|
|
}
|
|
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
/* no events need to happen for these */
|
|
bstp_timer_expired(&bp->bp_tc_timer);
|
|
bstp_timer_expired(&bp->bp_recent_root_timer);
|
|
bstp_timer_expired(&bp->bp_forward_delay_timer);
|
|
bstp_timer_expired(&bp->bp_recent_backup_timer);
|
|
|
|
if (bstp_timer_expired(&bp->bp_hello_timer))
|
|
bstp_hello_timer_expiry(bs, bp);
|
|
|
|
if (bstp_timer_expired(&bp->bp_message_age_timer))
|
|
bstp_message_age_expiry(bs, bp);
|
|
|
|
if (bstp_timer_expired(&bp->bp_migrate_delay_timer))
|
|
bstp_migrate_delay_expiry(bs, bp);
|
|
|
|
if (bstp_timer_expired(&bp->bp_edge_delay_timer))
|
|
bstp_edge_delay_expiry(bs, bp);
|
|
|
|
/* update the various state machines for the port */
|
|
bstp_update_state(bs, bp);
|
|
|
|
if (bp->bp_txcount > 0)
|
|
bp->bp_txcount--;
|
|
}
|
|
|
|
if (ifp->if_flags & IFF_RUNNING)
|
|
timeout_add_sec(&bs->bs_bstptimeout, 1);
|
|
|
|
splx(s);
|
|
if_put(ifp);
|
|
}
|
|
|
|
void
|
|
bstp_timer_start(struct bstp_timer *t, u_int16_t v)
|
|
{
|
|
t->value = v;
|
|
t->active = 1;
|
|
t->latched = 0;
|
|
}
|
|
|
|
void
|
|
bstp_timer_stop(struct bstp_timer *t)
|
|
{
|
|
t->value = 0;
|
|
t->active = 0;
|
|
t->latched = 0;
|
|
}
|
|
|
|
void
|
|
bstp_timer_latch(struct bstp_timer *t)
|
|
{
|
|
t->latched = 1;
|
|
t->active = 1;
|
|
}
|
|
|
|
int
|
|
bstp_timer_expired(struct bstp_timer *t)
|
|
{
|
|
if (t->active == 0 || t->latched)
|
|
return (0);
|
|
t->value -= BSTP_TICK_VAL;
|
|
if (t->value <= 0) {
|
|
bstp_timer_stop(t);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
bstp_hello_timer_expiry(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
if ((bp->bp_flags & BSTP_PORT_NEWINFO) ||
|
|
bp->bp_role == BSTP_ROLE_DESIGNATED ||
|
|
(bp->bp_role == BSTP_ROLE_ROOT &&
|
|
bp->bp_tc_timer.active == 1)) {
|
|
bstp_timer_start(&bp->bp_hello_timer, bp->bp_desg_htime);
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
bstp_transmit(bs, bp);
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_message_age_expiry(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
if (bp->bp_infois == BSTP_INFO_RECEIVED) {
|
|
bp->bp_infois = BSTP_INFO_AGED;
|
|
bstp_assign_roles(bs);
|
|
DPRINTF(bp, "aged info\n");
|
|
}
|
|
}
|
|
|
|
void
|
|
bstp_migrate_delay_expiry(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
bp->bp_flags |= BSTP_PORT_CANMIGRATE;
|
|
}
|
|
|
|
void
|
|
bstp_edge_delay_expiry(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
if ((bp->bp_flags & BSTP_PORT_AUTOEDGE) &&
|
|
bp->bp_protover == BSTP_PROTO_RSTP && bp->bp_proposing &&
|
|
bp->bp_role == BSTP_ROLE_DESIGNATED)
|
|
bp->bp_operedge = 1;
|
|
}
|
|
|
|
int
|
|
bstp_addr_cmp(const u_int8_t *a, const u_int8_t *b)
|
|
{
|
|
int i, d;
|
|
|
|
for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
|
|
d = ((int)a[i]) - ((int)b[i]);
|
|
}
|
|
|
|
return (d);
|
|
}
|
|
|
|
/*
|
|
* compare the bridge address component of the bridgeid
|
|
*/
|
|
int
|
|
bstp_same_bridgeid(u_int64_t id1, u_int64_t id2)
|
|
{
|
|
u_char addr1[ETHER_ADDR_LEN];
|
|
u_char addr2[ETHER_ADDR_LEN];
|
|
|
|
PV2ADDR(id1, addr1);
|
|
PV2ADDR(id2, addr2);
|
|
|
|
if (bstp_addr_cmp(addr1, addr2) == 0)
|
|
return (1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
bstp_initialization(struct bstp_state *bs)
|
|
{
|
|
struct bstp_port *bp;
|
|
struct ifnet *mif = NULL;
|
|
u_char *e_addr;
|
|
|
|
/*
|
|
* Search through the Ethernet interfaces and find the one
|
|
* with the lowest value.
|
|
* Make sure we take the address from an interface that is
|
|
* part of the bridge to make sure two bridges on the system
|
|
* will not use the same one. It is not possible for mif to be
|
|
* null, at this point we have at least one STP port and hence
|
|
* at least one NIC.
|
|
*/
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
struct ifnet *ifp;
|
|
|
|
if (mif == NULL) {
|
|
mif = if_get(bp->bp_ifindex);
|
|
continue;
|
|
}
|
|
|
|
if ((ifp = if_get(bp->bp_ifindex)) == NULL)
|
|
continue;
|
|
|
|
if (bstp_addr_cmp(LLADDR(ifp->if_sadl),
|
|
LLADDR(mif->if_sadl)) < 0) {
|
|
if_put(mif);
|
|
mif = ifp;
|
|
continue;
|
|
}
|
|
if_put(ifp);
|
|
}
|
|
|
|
if (mif == NULL) {
|
|
bstp_stop(bs);
|
|
bstp_reset(bs);
|
|
return;
|
|
}
|
|
|
|
e_addr = LLADDR(mif->if_sadl);
|
|
if_put(mif);
|
|
bs->bs_bridge_pv.pv_dbridge_id =
|
|
(((u_int64_t)bs->bs_bridge_priority) << 48) |
|
|
(((u_int64_t)e_addr[0]) << 40) |
|
|
(((u_int64_t)e_addr[1]) << 32) |
|
|
(((u_int64_t)e_addr[2]) << 24) |
|
|
(((u_int64_t)e_addr[3]) << 16) |
|
|
(((u_int64_t)e_addr[4]) << 8) |
|
|
(((u_int64_t)e_addr[5]));
|
|
|
|
bs->bs_bridge_pv.pv_root_id = bs->bs_bridge_pv.pv_dbridge_id;
|
|
bs->bs_bridge_pv.pv_cost = 0;
|
|
bs->bs_bridge_pv.pv_dport_id = 0;
|
|
bs->bs_bridge_pv.pv_port_id = 0;
|
|
|
|
if (!timeout_initialized(&bs->bs_bstptimeout))
|
|
timeout_set(&bs->bs_bstptimeout, bstp_tick, bs);
|
|
if (!timeout_pending(&bs->bs_bstptimeout))
|
|
timeout_add_sec(&bs->bs_bstptimeout, 1);
|
|
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
bp->bp_port_id = (bp->bp_priority << 8) |
|
|
(bp->bp_ifindex & 0xfff);
|
|
bstp_ifupdstatus(bs, bp);
|
|
}
|
|
|
|
bstp_assign_roles(bs);
|
|
bstp_timer_start(&bs->bs_link_timer, BSTP_LINK_TIMER);
|
|
}
|
|
|
|
struct bstp_state *
|
|
bstp_create(void)
|
|
{
|
|
struct bstp_state *bs;
|
|
|
|
bs = malloc(sizeof(*bs), M_DEVBUF, M_WAITOK|M_ZERO);
|
|
LIST_INIT(&bs->bs_bplist);
|
|
|
|
bs->bs_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
|
|
bs->bs_bridge_htime = BSTP_DEFAULT_HELLO_TIME;
|
|
bs->bs_bridge_fdelay = BSTP_DEFAULT_FORWARD_DELAY;
|
|
bs->bs_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
|
|
bs->bs_hold_time = BSTP_DEFAULT_HOLD_TIME;
|
|
bs->bs_migration_delay = BSTP_DEFAULT_MIGRATE_DELAY;
|
|
bs->bs_txholdcount = BSTP_DEFAULT_HOLD_COUNT;
|
|
bs->bs_protover = BSTP_PROTO_RSTP; /* STP instead of RSTP? */
|
|
|
|
getmicrotime(&bs->bs_last_tc_time);
|
|
|
|
return (bs);
|
|
}
|
|
|
|
void
|
|
bstp_destroy(struct bstp_state *bs)
|
|
{
|
|
if (bs == NULL)
|
|
return;
|
|
|
|
if (!LIST_EMPTY(&bs->bs_bplist))
|
|
panic("bstp still active");
|
|
|
|
free(bs, M_DEVBUF, sizeof *bs);
|
|
}
|
|
|
|
void
|
|
bstp_enable(struct bstp_state *bs, unsigned int ifindex)
|
|
{
|
|
bs->bs_ifindex = ifindex;
|
|
bstp_initialization(bs);
|
|
}
|
|
|
|
void
|
|
bstp_disable(struct bstp_state *bs)
|
|
{
|
|
if (timeout_initialized(&bs->bs_bstptimeout))
|
|
timeout_del(&bs->bs_bstptimeout);
|
|
bs->bs_ifindex = 0;
|
|
}
|
|
|
|
void
|
|
bstp_stop(struct bstp_state *bs)
|
|
{
|
|
struct bstp_port *bp;
|
|
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
|
|
|
|
if (timeout_initialized(&bs->bs_bstptimeout))
|
|
timeout_del(&bs->bs_bstptimeout);
|
|
}
|
|
|
|
struct bstp_port *
|
|
bstp_add(struct bstp_state *bs, struct ifnet *ifp)
|
|
{
|
|
struct bstp_port *bp;
|
|
|
|
switch (ifp->if_type) {
|
|
case IFT_ETHER: /* These can do spanning tree. */
|
|
break;
|
|
default:
|
|
/* Nothing else can. */
|
|
return (NULL);
|
|
}
|
|
|
|
bp = malloc(sizeof(*bp), M_DEVBUF, M_NOWAIT|M_ZERO);
|
|
if (bp == NULL)
|
|
return (NULL);
|
|
|
|
bp->bp_ifindex = ifp->if_index;
|
|
bp->bp_bs = bs;
|
|
bp->bp_priority = BSTP_DEFAULT_PORT_PRIORITY;
|
|
bp->bp_txcount = 0;
|
|
|
|
/* Init state */
|
|
bp->bp_infois = BSTP_INFO_DISABLED;
|
|
bp->bp_flags = BSTP_PORT_AUTOEDGE | BSTP_PORT_AUTOPTP;
|
|
bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
|
|
bstp_set_port_proto(bp, bs->bs_protover);
|
|
bstp_set_port_role(bp, BSTP_ROLE_DISABLED);
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_INACTIVE);
|
|
bp->bp_path_cost = bstp_calc_path_cost(bp);
|
|
|
|
LIST_INSERT_HEAD(&bs->bs_bplist, bp, bp_next);
|
|
|
|
bp->bp_active = 1;
|
|
bp->bp_flags |= BSTP_PORT_NEWINFO;
|
|
bstp_initialization(bs);
|
|
bstp_update_roles(bs, bp);
|
|
|
|
/* Register callback for physical link state changes */
|
|
task_set(&bp->bp_ltask, bstp_ifstate, ifp);
|
|
if_linkstatehook_add(ifp, &bp->bp_ltask);
|
|
|
|
return (bp);
|
|
}
|
|
|
|
void
|
|
bstp_delete(struct bstp_port *bp)
|
|
{
|
|
struct bstp_state *bs = bp->bp_bs;
|
|
struct ifnet *ifp;
|
|
|
|
if (!bp->bp_active)
|
|
panic("not a bstp member");
|
|
|
|
if ((ifp = if_get(bp->bp_ifindex)) != NULL)
|
|
if_linkstatehook_del(ifp, &bp->bp_ltask);
|
|
if_put(ifp);
|
|
|
|
LIST_REMOVE(bp, bp_next);
|
|
free(bp, M_DEVBUF, sizeof *bp);
|
|
bstp_initialization(bs);
|
|
}
|
|
|
|
u_int8_t
|
|
bstp_getstate(struct bstp_state *bs, struct bstp_port *bp)
|
|
{
|
|
u_int8_t state = bp->bp_state;
|
|
|
|
if (bs->bs_protover != BSTP_PROTO_STP)
|
|
return (state);
|
|
|
|
/*
|
|
* Translate RSTP roles and states to STP port states
|
|
* (IEEE Std 802.1D-2004 Table 17-1).
|
|
*/
|
|
if (bp->bp_role == BSTP_ROLE_DISABLED)
|
|
state = BSTP_IFSTATE_DISABLED;
|
|
else if (bp->bp_role == BSTP_ROLE_ALTERNATE ||
|
|
bp->bp_role == BSTP_ROLE_BACKUP)
|
|
state = BSTP_IFSTATE_BLOCKING;
|
|
else if (state == BSTP_IFSTATE_DISCARDING)
|
|
state = BSTP_IFSTATE_LISTENING;
|
|
|
|
return (state);
|
|
}
|
|
|
|
void
|
|
bstp_ifsflags(struct bstp_port *bp, u_int flags)
|
|
{
|
|
struct bstp_state *bs;
|
|
|
|
if ((flags & IFBIF_STP) == 0)
|
|
return;
|
|
bs = bp->bp_bs;
|
|
|
|
/*
|
|
* Set edge status
|
|
*/
|
|
if (flags & IFBIF_BSTP_AUTOEDGE) {
|
|
if ((bp->bp_flags & BSTP_PORT_AUTOEDGE) == 0) {
|
|
bp->bp_flags |= BSTP_PORT_AUTOEDGE;
|
|
|
|
/* we may be able to transition straight to edge */
|
|
if (bp->bp_edge_delay_timer.active == 0)
|
|
bstp_edge_delay_expiry(bs, bp);
|
|
}
|
|
} else
|
|
bp->bp_flags &= ~BSTP_PORT_AUTOEDGE;
|
|
|
|
if (flags & IFBIF_BSTP_EDGE)
|
|
bp->bp_operedge = 1;
|
|
else
|
|
bp->bp_operedge = 0;
|
|
|
|
/*
|
|
* Set point to point status
|
|
*/
|
|
if (flags & IFBIF_BSTP_AUTOPTP) {
|
|
if ((bp->bp_flags & BSTP_PORT_AUTOPTP) == 0) {
|
|
bp->bp_flags |= BSTP_PORT_AUTOPTP;
|
|
|
|
bstp_ifupdstatus(bs, bp);
|
|
}
|
|
} else
|
|
bp->bp_flags &= ~BSTP_PORT_AUTOPTP;
|
|
|
|
if (flags & IFBIF_BSTP_PTP)
|
|
bp->bp_ptp_link = 1;
|
|
else
|
|
bp->bp_ptp_link = 0;
|
|
}
|
|
|
|
int
|
|
bstp_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct bridge_softc *sc = (struct bridge_softc *)ifp->if_softc;
|
|
struct bstp_state *bs = sc->sc_stp;
|
|
struct ifbrparam *ifbp = (struct ifbrparam *)data;
|
|
struct ifbreq *ifbr = (struct ifbreq *)data;
|
|
struct bridge_iflist *bif;
|
|
struct bstp_port *bp;
|
|
int r = 0, err = 0, val;
|
|
|
|
switch (cmd) {
|
|
case SIOCBRDGSIFPRIO:
|
|
case SIOCBRDGSIFCOST:
|
|
err = bridge_findbif(sc, ifbr->ifbr_ifsname, &bif);
|
|
if (err != 0)
|
|
break;
|
|
if ((bif->bif_flags & IFBIF_STP) == 0) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
bp = bif->bif_stp;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (err)
|
|
return (err);
|
|
|
|
switch (cmd) {
|
|
case SIOCBRDGGPRI:
|
|
ifbp->ifbrp_prio = bs->bs_bridge_priority;
|
|
break;
|
|
case SIOCBRDGSPRI:
|
|
val = ifbp->ifbrp_prio;
|
|
if (val < 0 || val > BSTP_MAX_PRIORITY) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
|
|
/* Limit to steps of 4096 */
|
|
val -= val % 4096;
|
|
bs->bs_bridge_priority = val;
|
|
r = 1;
|
|
break;
|
|
case SIOCBRDGGMA:
|
|
ifbp->ifbrp_maxage = bs->bs_bridge_max_age >> 8;
|
|
break;
|
|
case SIOCBRDGSMA:
|
|
val = ifbp->ifbrp_maxage;
|
|
|
|
/* convert seconds to ticks */
|
|
val *= BSTP_TICK_VAL;
|
|
|
|
if (val < BSTP_MIN_MAX_AGE || val > BSTP_MAX_MAX_AGE) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
bs->bs_bridge_max_age = val;
|
|
r = 1;
|
|
break;
|
|
case SIOCBRDGGHT:
|
|
ifbp->ifbrp_hellotime = bs->bs_bridge_htime >> 8;
|
|
break;
|
|
case SIOCBRDGSHT:
|
|
val = ifbp->ifbrp_hellotime;
|
|
|
|
/* convert seconds to ticks */
|
|
val *= BSTP_TICK_VAL;
|
|
|
|
/* value can only be changed in legacy stp mode */
|
|
if (bs->bs_protover != BSTP_PROTO_STP) {
|
|
err = EPERM;
|
|
break;
|
|
}
|
|
if (val < BSTP_MIN_HELLO_TIME || val > BSTP_MAX_HELLO_TIME) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
bs->bs_bridge_htime = val;
|
|
r = 1;
|
|
break;
|
|
case SIOCBRDGGFD:
|
|
ifbp->ifbrp_fwddelay = bs->bs_bridge_fdelay >> 8;
|
|
break;
|
|
case SIOCBRDGSFD:
|
|
val = ifbp->ifbrp_fwddelay;
|
|
|
|
/* convert seconds to ticks */
|
|
val *= BSTP_TICK_VAL;
|
|
|
|
if (val < BSTP_MIN_FORWARD_DELAY ||
|
|
val > BSTP_MAX_FORWARD_DELAY) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
bs->bs_bridge_fdelay = val;
|
|
r = 1;
|
|
break;
|
|
case SIOCBRDGSTXHC:
|
|
val = ifbp->ifbrp_txhc;
|
|
|
|
if (val < BSTP_MIN_HOLD_COUNT || val > BSTP_MAX_HOLD_COUNT) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
bs->bs_txholdcount = val;
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
|
|
bp->bp_txcount = 0;
|
|
break;
|
|
case SIOCBRDGSIFPRIO:
|
|
val = ifbr->ifbr_priority;
|
|
if (val < 0 || val > BSTP_MAX_PORT_PRIORITY)
|
|
return (EINVAL);
|
|
|
|
/* Limit to steps of 16 */
|
|
val -= val % 16;
|
|
bp->bp_priority = val;
|
|
r = 1;
|
|
break;
|
|
case SIOCBRDGSIFCOST:
|
|
val = ifbr->ifbr_path_cost;
|
|
if (val > BSTP_MAX_PATH_COST) {
|
|
err = EINVAL;
|
|
break;
|
|
}
|
|
if (val == 0) { /* use auto */
|
|
bp->bp_flags &= ~BSTP_PORT_ADMCOST;
|
|
bp->bp_path_cost = bstp_calc_path_cost(bp);
|
|
} else {
|
|
bp->bp_path_cost = val;
|
|
bp->bp_flags |= BSTP_PORT_ADMCOST;
|
|
}
|
|
r = 1;
|
|
break;
|
|
case SIOCBRDGSPROTO:
|
|
val = ifbp->ifbrp_proto;
|
|
|
|
/* Supported protocol versions */
|
|
switch (val) {
|
|
case BSTP_PROTO_STP:
|
|
case BSTP_PROTO_RSTP:
|
|
bs->bs_protover = val;
|
|
bs->bs_bridge_htime = BSTP_DEFAULT_HELLO_TIME;
|
|
LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
|
|
/* reinit state */
|
|
bp->bp_infois = BSTP_INFO_DISABLED;
|
|
bp->bp_txcount = 0;
|
|
bstp_set_port_proto(bp, bs->bs_protover);
|
|
bstp_set_port_role(bp, BSTP_ROLE_DISABLED);
|
|
bstp_set_port_tc(bp, BSTP_TCSTATE_INACTIVE);
|
|
bstp_timer_stop(&bp->bp_recent_backup_timer);
|
|
}
|
|
r = 1;
|
|
break;
|
|
default:
|
|
err = EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (r)
|
|
bstp_initialization(bs);
|
|
|
|
return (err);
|
|
}
|