+/* $NetBSD: bridgestp.c,v 1.5 2003/11/28 08:56:48 keihan Exp $ */
+
/*
- * Copyright (c) 2007-2009 Apple Inc. All rights reserved.
+ * Copyright (c) 2009-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/* $fpwf: Revision 1.2 2007/05/17 03:38:46 rnewberry Exp $ */
-/* $NetBSD: bridgestp.c,v 1.10 2006/11/16 01:33:40 christos 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
* 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
/*
* Implementation of the spanning tree protocol as defined in
- * ISO/IEC Final DIS 15802-3 (IEEE P802.1D/D17), May 25, 1998.
- * (In English: IEEE 802.1D, Draft 17, 1998)
+ * ISO/IEC 802.1D-2004, June 9, 2004.
*/
-/* $NetBSD: if_bridgevar.h,v 1.8 2005/12/10 23:21:38 elad Exp $ */
-
#include <sys/cdefs.h>
+//__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
-#include <sys/ioctl.h>
+#include <sys/sockio.h>
#include <sys/kernel.h>
-#include <sys/callout.h>
+//#include <sys/callout.h>
+//#include <sys/module.h>
+#include <sys/proc.h>
+#include <sys/lock.h>
+//#include <sys/mutex.h>
+//#include <sys/taskqueue.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/if_llc.h>
-
-#include <net/if_ether.h>
-#include <net/if_bridgevar.h>
#include <net/if_media.h>
#include <net/kpi_interface.h>
-/* BPDU message types */
-#define BSTP_MSGTYPE_CFG 0x00 /* Configuration */
-#define BSTP_MSGTYPE_TCN 0x80 /* Topology chg notification */
-
-/* BPDU flags */
-#define BSTP_FLAG_TC 0x01 /* Topology change */
-#define BSTP_FLAG_TCA 0x80 /* Topology change ack */
-
-#define BSTP_MESSAGE_AGE_INCR (1 * 256) /* in 256ths of a second */
-#define BSTP_TICK_VAL (1 * 256) /* in 256ths of a second */
-
-/*
- * 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 */
-} __attribute__((__packed__));
-
-/* 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__));
-
-const uint8_t bstp_etheraddr[] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
-
-void bstp_initialize_port(struct bridge_softc *, struct bridge_iflist *);
-void bstp_ifupdstatus(struct bridge_softc *, struct bridge_iflist *);
-void bstp_enable_port(struct bridge_softc *, struct bridge_iflist *);
-void bstp_disable_port(struct bridge_softc *, struct bridge_iflist *);
-void bstp_enable_change_detection(struct bridge_iflist *);
-void bstp_disable_change_detection(struct bridge_iflist *);
-int bstp_root_bridge(struct bridge_softc *sc);
-int bstp_supersedes_port_info(struct bridge_softc *,
- struct bridge_iflist *, struct bstp_config_unit *);
-int bstp_designated_port(struct bridge_softc *, struct bridge_iflist *);
-int bstp_designated_for_some_port(struct bridge_softc *);
-void bstp_transmit_config(struct bridge_softc *, struct bridge_iflist *);
-void bstp_transmit_tcn(struct bridge_softc *);
-void bstp_received_config_bpdu(struct bridge_softc *,
- struct bridge_iflist *, struct bstp_config_unit *);
-void bstp_received_tcn_bpdu(struct bridge_softc *, struct bridge_iflist *,
- struct bstp_tcn_unit *);
-void bstp_record_config_information(struct bridge_softc *,
- struct bridge_iflist *, struct bstp_config_unit *);
-void bstp_record_config_timeout_values(struct bridge_softc *,
- struct bstp_config_unit *);
-void bstp_config_bpdu_generation(struct bridge_softc *);
-void bstp_send_config_bpdu(struct bridge_softc *, struct bridge_iflist *,
- struct bstp_config_unit *);
-void bstp_configuration_update(struct bridge_softc *);
-void bstp_root_selection(struct bridge_softc *);
-void bstp_designated_port_selection(struct bridge_softc *);
-void bstp_become_designated_port(struct bridge_softc *,
- struct bridge_iflist *);
-void bstp_port_state_selection(struct bridge_softc *);
-void bstp_make_forwarding(struct bridge_softc *, struct bridge_iflist *);
-void bstp_make_blocking(struct bridge_softc *, struct bridge_iflist *);
-void bstp_set_port_state(struct bridge_iflist *, uint8_t);
-void bstp_set_bridge_priority(struct bridge_softc *, uint64_t);
-void bstp_set_port_priority(struct bridge_softc *, struct bridge_iflist *,
- uint16_t);
-void bstp_set_path_cost(struct bridge_softc *, struct bridge_iflist *,
- uint32_t);
-void bstp_topology_change_detection(struct bridge_softc *);
-void bstp_topology_change_acknowledged(struct bridge_softc *);
-void bstp_acknowledge_topology_change(struct bridge_softc *,
- struct bridge_iflist *);
-
-void bstp_tick(void *);
-void bstp_timer_start(struct bridge_timer *, uint16_t);
-void bstp_timer_stop(struct bridge_timer *);
-int bstp_timer_expired(struct bridge_timer *, uint16_t);
-
-void bstp_hold_timer_expiry(struct bridge_softc *, struct bridge_iflist *);
-void bstp_message_age_timer_expiry(struct bridge_softc *,
- struct bridge_iflist *);
-void bstp_forward_delay_timer_expiry(struct bridge_softc *,
- struct bridge_iflist *);
-void bstp_topology_change_timer_expiry(struct bridge_softc *);
-void bstp_tcn_timer_expiry(struct bridge_softc *);
-void bstp_hello_timer_expiry(struct bridge_softc *);
-
-void
-bstp_transmit_config(struct bridge_softc *sc, struct bridge_iflist *bif)
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/if_ether.h>
+#include <net/bridgestp.h>
+
+#include <kern/thread.h>
+
+decl_lck_mtx_data(static, bstp_task_mtx_data);
+static lck_mtx_t *bstp_task_mtx = &bstp_task_mtx_data;
+static lck_grp_t *bstp_task_grp = NULL;
+static lck_attr_t *bstp_task_attr = NULL;
+static thread_t bstp_task_thread;
+static TAILQ_HEAD(bstp_task_queue, bstp_task)
+ bstp_task_queue = TAILQ_HEAD_INITIALIZER(bstp_task_queue);
+static struct bstp_task *bstp_task_queue_running = NULL;
+
+static void bstp_create_task_thread(void);
+static void bstp_task_thread_func(void);
+
+static void bstp_task_enqueue(struct bstp_task *);
+static void bstp_task_drain(struct bstp_task *);
+
+#define BSTP_TASK_INIT(bt, func, context) do { \
+ (bt)->bt_count = 0; \
+ (bt)->bt_func = func; \
+ (bt)->bt_context = context; \
+} while(0)
+
+
+
+#define BSTP_LOCK_INIT(_bs) (_bs)->bs_mtx = lck_mtx_alloc_init(bstp_lock_grp, bstp_lock_attr)
+#define BSTP_LOCK_DESTROY(_bs) lck_mtx_free((_bs)->bs_mtx, bstp_lock_grp)
+#define BSTP_LOCK(_bs) lck_mtx_lock((_bs)->bs_mtx)
+#define BSTP_UNLOCK(_bs) lck_mtx_unlock((_bs)->bs_mtx)
+#define BSTP_LOCK_ASSERT(_bs) LCK_MTX_ASSERT((_bs)->bs_mtx, LCK_MTX_ASSERT_OWNED)
+
+
+#ifdef BRIDGESTP_DEBUG
+#define DPRINTF(fmt, arg...) printf("bstp: " fmt, ##arg)
+#else
+#define DPRINTF(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
+
+LIST_HEAD(, bstp_state) bstp_list;
+decl_lck_mtx_data(static, bstp_list_mtx_data);
+static lck_mtx_t *bstp_list_mtx = &bstp_list_mtx_data;
+static lck_grp_t *bstp_lock_grp = NULL;
+static lck_attr_t *bstp_lock_attr = NULL;
+
+static void bstp_transmit(struct bstp_state *, struct bstp_port *);
+static void bstp_transmit_bpdu(struct bstp_state *, struct bstp_port *);
+static void bstp_transmit_tcn(struct bstp_state *, struct bstp_port *);
+static void bstp_decode_bpdu(struct bstp_port *, struct bstp_cbpdu *,
+ struct bstp_config_unit *);
+static void bstp_send_bpdu(struct bstp_state *, struct bstp_port *,
+ struct bstp_cbpdu *);
+static void bstp_enqueue(struct ifnet *, struct mbuf *);
+static int bstp_pdu_flags(struct bstp_port *);
+static void bstp_received_stp(struct bstp_state *, struct bstp_port *,
+ struct mbuf **, struct bstp_tbpdu *);
+static void bstp_received_rstp(struct bstp_state *, struct bstp_port *,
+ struct mbuf **, struct bstp_tbpdu *);
+static void bstp_received_tcn(struct bstp_state *, struct bstp_port *,
+ struct bstp_tcn_unit *);
+static void bstp_received_bpdu(struct bstp_state *, struct bstp_port *,
+ struct bstp_config_unit *);
+static int bstp_pdu_rcvtype(struct bstp_port *, struct bstp_config_unit *);
+static int bstp_pdu_bettersame(struct bstp_port *, int);
+static int bstp_info_cmp(struct bstp_pri_vector *,
+ struct bstp_pri_vector *);
+static int bstp_info_superior(struct bstp_pri_vector *,
+ struct bstp_pri_vector *);
+static void bstp_assign_roles(struct bstp_state *);
+static void bstp_update_roles(struct bstp_state *, struct bstp_port *);
+static void bstp_update_state(struct bstp_state *, struct bstp_port *);
+static void bstp_update_tc(struct bstp_port *);
+static void bstp_update_info(struct bstp_port *);
+static void bstp_set_other_tcprop(struct bstp_port *);
+static void bstp_set_all_reroot(struct bstp_state *);
+static void bstp_set_all_sync(struct bstp_state *);
+static void bstp_set_port_state(struct bstp_port *, int);
+static void bstp_set_port_role(struct bstp_port *, int);
+static void bstp_set_port_proto(struct bstp_port *, int);
+static void bstp_set_port_tc(struct bstp_port *, int);
+static void bstp_set_timer_tc(struct bstp_port *);
+static void bstp_set_timer_msgage(struct bstp_port *);
+static int bstp_rerooted(struct bstp_state *, struct bstp_port *);
+static uint32_t bstp_calc_path_cost(struct bstp_port *);
+static void bstp_notify_state(void *, int);
+static void bstp_notify_rtage(void *, int);
+static void bstp_ifupdstatus(struct bstp_state *, struct bstp_port *);
+static void bstp_enable_port(struct bstp_state *, struct bstp_port *);
+static void bstp_disable_port(struct bstp_state *, struct bstp_port *);
+static void bstp_tick(void *);
+static void bstp_timer_start(struct bstp_timer *, uint16_t);
+static void bstp_timer_stop(struct bstp_timer *);
+static void bstp_timer_latch(struct bstp_timer *);
+static int bstp_timer_expired(struct bstp_timer *);
+static void bstp_hello_timer_expiry(struct bstp_state *,
+ struct bstp_port *);
+static void bstp_message_age_expiry(struct bstp_state *,
+ struct bstp_port *);
+static void bstp_migrate_delay_expiry(struct bstp_state *,
+ struct bstp_port *);
+static void bstp_edge_delay_expiry(struct bstp_state *,
+ struct bstp_port *);
+static int bstp_addr_cmp(const uint8_t *, const uint8_t *);
+static int bstp_same_bridgeid(uint64_t, uint64_t);
+static void bstp_reinit(struct bstp_state *);
+
+static void
+bstp_transmit(struct bstp_state *bs, struct bstp_port *bp)
{
- if (bif->bif_hold_timer.active) {
- bif->bif_config_pending = 1;
+ if (bs->bs_running == 0)
return;
- }
-
- bif->bif_config_bpdu.cu_message_type = BSTP_MSGTYPE_CFG;
- bif->bif_config_bpdu.cu_rootid = sc->sc_designated_root;
- bif->bif_config_bpdu.cu_root_path_cost = sc->sc_root_path_cost;
- bif->bif_config_bpdu.cu_bridge_id = sc->sc_bridge_id;
- bif->bif_config_bpdu.cu_port_id = bif->bif_port_id;
-
- if (bstp_root_bridge(sc))
- bif->bif_config_bpdu.cu_message_age = 0;
- else
- bif->bif_config_bpdu.cu_message_age =
- sc->sc_root_port->bif_message_age_timer.value +
- BSTP_MESSAGE_AGE_INCR;
-
- bif->bif_config_bpdu.cu_max_age = sc->sc_max_age;
- bif->bif_config_bpdu.cu_hello_time = sc->sc_hello_time;
- bif->bif_config_bpdu.cu_forward_delay = sc->sc_forward_delay;
- bif->bif_config_bpdu.cu_topology_change_acknowledgment
- = bif->bif_topology_change_acknowledge;
- bif->bif_config_bpdu.cu_topology_change = sc->sc_topology_change;
-
- if (bif->bif_config_bpdu.cu_message_age < sc->sc_max_age) {
- bif->bif_topology_change_acknowledge = 0;
- bif->bif_config_pending = 0;
- bstp_send_config_bpdu(sc, bif, &bif->bif_config_bpdu);
- bstp_timer_start(&bif->bif_hold_timer, 0);
- }
-}
-
-void
-bstp_send_config_bpdu(struct bridge_softc *sc, struct bridge_iflist *bif,
- struct bstp_config_unit *cu)
-{
- struct ifnet *ifp;
- struct mbuf *m;
- struct ether_header *eh;
- struct bstp_cbpdu bpdu;
- ifp = bif->bif_ifp;
-
- if ((ifp->if_flags & IFF_RUNNING) == 0)
+ /*
+ * 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;
-
- MGETHDR(m, M_DONTWAIT, MT_DATA);
- if (m == NULL)
+ }
+ if (bp->bp_txcount > bs->bs_txholdcount)
+ /* Ran out of karma */
return;
- eh = mtod(m, struct ether_header *);
-
- m->m_pkthdr.rcvif = ifp;
- m->m_pkthdr.len = sizeof(*eh) + sizeof(bpdu);
- m->m_len = m->m_pkthdr.len;
-
- bpdu.cbu_ssap = bpdu.cbu_dsap = LLC_8021D_LSAP;
- bpdu.cbu_ctl = LLC_UI;
- bpdu.cbu_protoid = htons(0);
- bpdu.cbu_protover = 0;
- bpdu.cbu_bpdutype = cu->cu_message_type;
- bpdu.cbu_flags = (cu->cu_topology_change ? BSTP_FLAG_TC : 0) |
- (cu->cu_topology_change_acknowledgment ? BSTP_FLAG_TCA : 0);
-
- bpdu.cbu_rootpri = htons(cu->cu_rootid >> 48);
- bpdu.cbu_rootaddr[0] = cu->cu_rootid >> 40;
- bpdu.cbu_rootaddr[1] = cu->cu_rootid >> 32;
- bpdu.cbu_rootaddr[2] = cu->cu_rootid >> 24;
- bpdu.cbu_rootaddr[3] = cu->cu_rootid >> 16;
- bpdu.cbu_rootaddr[4] = cu->cu_rootid >> 8;
- bpdu.cbu_rootaddr[5] = cu->cu_rootid >> 0;
-
- bpdu.cbu_rootpathcost = htonl(cu->cu_root_path_cost);
-
- bpdu.cbu_bridgepri = htons(cu->cu_rootid >> 48);
- bpdu.cbu_bridgeaddr[0] = cu->cu_rootid >> 40;
- bpdu.cbu_bridgeaddr[1] = cu->cu_rootid >> 32;
- bpdu.cbu_bridgeaddr[2] = cu->cu_rootid >> 24;
- bpdu.cbu_bridgeaddr[3] = cu->cu_rootid >> 16;
- bpdu.cbu_bridgeaddr[4] = cu->cu_rootid >> 8;
- bpdu.cbu_bridgeaddr[5] = cu->cu_rootid >> 0;
-
- bpdu.cbu_portid = htons(cu->cu_port_id);
- bpdu.cbu_messageage = htons(cu->cu_message_age);
- bpdu.cbu_maxage = htons(cu->cu_max_age);
- bpdu.cbu_hellotime = htons(cu->cu_hello_time);
- bpdu.cbu_forwarddelay = htons(cu->cu_forward_delay);
-
- memcpy(eh->ether_shost, ifnet_lladdr(ifp), ETHER_ADDR_LEN);
- memcpy(eh->ether_dhost, bstp_etheraddr, ETHER_ADDR_LEN);
- eh->ether_type = htons(sizeof(bpdu));
-
- memcpy(mtod(m, caddr_t) + sizeof(*eh), &bpdu, sizeof(bpdu));
-
- bridge_enqueue(sc, ifp, m); // APPLE MODIFICATION - no flags param
+ 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;
}
-int
-bstp_root_bridge(struct bridge_softc *sc)
+static void
+bstp_transmit_bpdu(struct bstp_state *bs, struct bstp_port *bp)
{
- return (sc->sc_designated_root == sc->sc_bridge_id);
-}
+ struct bstp_cbpdu bpdu;
-int
-bstp_supersedes_port_info(struct bridge_softc *sc, struct bridge_iflist *bif,
- struct bstp_config_unit *cu)
-{
- if (cu->cu_rootid < bif->bif_designated_root)
- return (1);
- if (cu->cu_rootid > bif->bif_designated_root)
- return (0);
+ BSTP_LOCK_ASSERT(bs);
- if (cu->cu_root_path_cost < bif->bif_designated_cost)
- return (1);
- if (cu->cu_root_path_cost > bif->bif_designated_cost)
- return (0);
+ bpdu.cbu_rootpri = htons(bp->bp_desg_pv.pv_root_id >> 48);
+ PV2ADDR(bp->bp_desg_pv.pv_root_id, bpdu.cbu_rootaddr);
- if (cu->cu_bridge_id < bif->bif_designated_bridge)
- return (1);
- if (cu->cu_bridge_id > bif->bif_designated_bridge)
- return (0);
+ bpdu.cbu_rootpathcost = htonl(bp->bp_desg_pv.pv_cost);
- if (sc->sc_bridge_id != cu->cu_bridge_id)
- return (1);
- if (cu->cu_port_id <= bif->bif_designated_port)
- return (1);
- return (0);
-}
+ bpdu.cbu_bridgepri = htons(bp->bp_desg_pv.pv_dbridge_id >> 48);
+ PV2ADDR(bp->bp_desg_pv.pv_dbridge_id, bpdu.cbu_bridgeaddr);
-void
-bstp_record_config_information(__unused struct bridge_softc *sc,
- struct bridge_iflist *bif, struct bstp_config_unit *cu)
-{
- bif->bif_designated_root = cu->cu_rootid;
- bif->bif_designated_cost = cu->cu_root_path_cost;
- bif->bif_designated_bridge = cu->cu_bridge_id;
- bif->bif_designated_port = cu->cu_port_id;
- bstp_timer_start(&bif->bif_message_age_timer, cu->cu_message_age);
-}
+ 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);
-void
-bstp_record_config_timeout_values(struct bridge_softc *sc,
- struct bstp_config_unit *config)
-{
- sc->sc_max_age = config->cu_max_age;
- sc->sc_hello_time = config->cu_hello_time;
- sc->sc_forward_delay = config->cu_forward_delay;
- sc->sc_topology_change = config->cu_topology_change;
-}
+ bpdu.cbu_flags = bstp_pdu_flags(bp);
-void
-bstp_config_bpdu_generation(struct bridge_softc *sc)
-{
- struct bridge_iflist *bif;
+ switch (bp->bp_protover) {
+ case BSTP_PROTO_STP:
+ bpdu.cbu_bpdutype = BSTP_MSGTYPE_CFG;
+ break;
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bstp_designated_port(sc, bif) &&
- (bif->bif_state != BSTP_IFSTATE_DISABLED))
- bstp_transmit_config(sc, bif);
+ case BSTP_PROTO_RSTP:
+ bpdu.cbu_bpdutype = BSTP_MSGTYPE_RSTP;
+ break;
}
-}
-int
-bstp_designated_port(struct bridge_softc *sc, struct bridge_iflist *bif)
-{
- return ((bif->bif_designated_bridge == sc->sc_bridge_id)
- && (bif->bif_designated_port == bif->bif_port_id));
+ bstp_send_bpdu(bs, bp, &bpdu);
}
-void
-bstp_transmit_tcn(struct bridge_softc *sc)
+static void
+bstp_transmit_tcn(struct bstp_state *bs, struct bstp_port *bp)
{
struct bstp_tbpdu bpdu;
- struct bridge_iflist *bif = sc->sc_root_port;
- struct ifnet *ifp;
+ struct ifnet *ifp = bp->bp_ifp;
struct ether_header *eh;
struct mbuf *m;
+ int touched = bs ? 1 : 0;
+
+ touched++;
+
+ KASSERT(bp == bs->bs_root_port, ("%s: bad root port\n", __func__));
- KASSERT(bif != NULL, "bstp_transmit_tcn bif NULL");
- ifp = bif->bif_ifp;
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
eh = mtod(m, struct ether_header *);
- memcpy(eh->ether_shost, ifnet_lladdr(ifp), ETHER_ADDR_LEN);
+ memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN);
memcpy(eh->ether_dhost, bstp_etheraddr, ETHER_ADDR_LEN);
eh->ether_type = htons(sizeof(bpdu));
memcpy(mtod(m, caddr_t) + sizeof(*eh), &bpdu, sizeof(bpdu));
- bridge_enqueue(sc, ifp, m); // APPLE MODIFICATION - no flags param
+ bp->bp_txcount++;
+ bstp_enqueue(ifp, m);
}
-void
-bstp_configuration_update(struct bridge_softc *sc)
+static void
+bstp_decode_bpdu(struct bstp_port *bp, struct bstp_cbpdu *cpdu,
+ struct bstp_config_unit *cu)
{
- bstp_root_selection(sc);
- bstp_designated_port_selection(sc);
+ int flags;
+
+ cu->cu_pv.pv_root_id =
+ (((uint64_t)ntohs(cpdu->cbu_rootpri)) << 48) |
+ (((uint64_t)cpdu->cbu_rootaddr[0]) << 40) |
+ (((uint64_t)cpdu->cbu_rootaddr[1]) << 32) |
+ (((uint64_t)cpdu->cbu_rootaddr[2]) << 24) |
+ (((uint64_t)cpdu->cbu_rootaddr[3]) << 16) |
+ (((uint64_t)cpdu->cbu_rootaddr[4]) << 8) |
+ (((uint64_t)cpdu->cbu_rootaddr[5]) << 0);
+
+ cu->cu_pv.pv_dbridge_id =
+ (((uint64_t)ntohs(cpdu->cbu_bridgepri)) << 48) |
+ (((uint64_t)cpdu->cbu_bridgeaddr[0]) << 40) |
+ (((uint64_t)cpdu->cbu_bridgeaddr[1]) << 32) |
+ (((uint64_t)cpdu->cbu_bridgeaddr[2]) << 24) |
+ (((uint64_t)cpdu->cbu_bridgeaddr[3]) << 16) |
+ (((uint64_t)cpdu->cbu_bridgeaddr[4]) << 8) |
+ (((uint64_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_root_selection(struct bridge_softc *sc)
+static void
+bstp_send_bpdu(struct bstp_state *bs, struct bstp_port *bp,
+ struct bstp_cbpdu *bpdu)
{
- struct bridge_iflist *root_port = NULL, *bif;
-
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bstp_designated_port(sc, bif))
- continue;
- if (bif->bif_state == BSTP_IFSTATE_DISABLED)
- continue;
- if (bif->bif_designated_root >= sc->sc_bridge_id)
- continue;
- if (root_port == NULL)
- goto set_port;
+ struct ifnet *ifp;
+ struct mbuf *m;
+ struct ether_header *eh;
- if (bif->bif_designated_root < root_port->bif_designated_root)
- goto set_port;
- if (bif->bif_designated_root > root_port->bif_designated_root)
- continue;
+ BSTP_LOCK_ASSERT(bs);
- if ((bif->bif_designated_cost + bif->bif_path_cost) <
- (root_port->bif_designated_cost + root_port->bif_path_cost))
- goto set_port;
- if ((bif->bif_designated_cost + bif->bif_path_cost) >
- (root_port->bif_designated_cost + root_port->bif_path_cost))
- continue;
+ ifp = bp->bp_ifp;
- if (bif->bif_designated_bridge <
- root_port->bif_designated_bridge)
- goto set_port;
- if (bif->bif_designated_bridge >
- root_port->bif_designated_bridge)
- continue;
+ if ((ifp->if_flags & IFF_RUNNING) == 0)
+ return;
- if (bif->bif_designated_port < root_port->bif_designated_port)
- goto set_port;
- if (bif->bif_designated_port > root_port->bif_designated_port)
- continue;
+ MGETHDR(m, M_DONTWAIT, MT_DATA);
+ if (m == NULL)
+ return;
- if (bif->bif_port_id >= root_port->bif_port_id)
- continue;
-set_port:
- root_port = bif;
- }
+ eh = mtod(m, struct ether_header *);
- sc->sc_root_port = root_port;
- if (root_port == NULL) {
- sc->sc_designated_root = sc->sc_bridge_id;
- sc->sc_root_path_cost = 0;
- } else {
- sc->sc_designated_root = root_port->bif_designated_root;
- sc->sc_root_path_cost = root_port->bif_designated_cost +
- root_port->bif_path_cost;
- }
-}
+ bpdu->cbu_ssap = bpdu->cbu_dsap = LLC_8021D_LSAP;
+ bpdu->cbu_ctl = LLC_UI;
+ bpdu->cbu_protoid = htons(BSTP_PROTO_ID);
-void
-bstp_designated_port_selection(struct bridge_softc *sc)
-{
- struct bridge_iflist *bif;
+ memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN);
+ memcpy(eh->ether_dhost, bstp_etheraddr, ETHER_ADDR_LEN);
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bstp_designated_port(sc, bif))
- goto designated;
- if (bif->bif_designated_root != sc->sc_designated_root)
- goto designated;
-
- if (sc->sc_root_path_cost < bif->bif_designated_cost)
- goto designated;
- if (sc->sc_root_path_cost > bif->bif_designated_cost)
- continue;
+ 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;
- if (sc->sc_bridge_id < bif->bif_designated_bridge)
- goto designated;
- if (sc->sc_bridge_id > bif->bif_designated_bridge)
- continue;
+ 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;
- if (bif->bif_port_id > bif->bif_designated_port)
- continue;
-designated:
- bstp_become_designated_port(sc, bif);
+ default:
+ panic("not implemented");
}
-}
+ m->m_pkthdr.rcvif = ifp;
+ m->m_len = m->m_pkthdr.len;
-void
-bstp_become_designated_port(struct bridge_softc *sc, struct bridge_iflist *bif)
-{
- bif->bif_designated_root = sc->sc_designated_root;
- bif->bif_designated_cost = sc->sc_root_path_cost;
- bif->bif_designated_bridge = sc->sc_bridge_id;
- bif->bif_designated_port = bif->bif_port_id;
+ bp->bp_txcount++;
+ bstp_enqueue(ifp, m);
}
-void
-bstp_port_state_selection(struct bridge_softc *sc)
+static void
+bstp_enqueue(struct ifnet *dst_ifp, struct mbuf *m)
{
- struct bridge_iflist *bif;
-
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bif == sc->sc_root_port) {
- bif->bif_config_pending = 0;
- bif->bif_topology_change_acknowledge = 0;
- bstp_make_forwarding(sc, bif);
- } else if (bstp_designated_port(sc, bif)) {
- bstp_timer_stop(&bif->bif_message_age_timer);
- bstp_make_forwarding(sc, bif);
- } else {
- bif->bif_config_pending = 0;
- bif->bif_topology_change_acknowledge = 0;
- bstp_make_blocking(sc, bif);
- }
+ errno_t error = 0;
+ u_int32_t len = m->m_pkthdr.len;
+
+ m->m_flags |= M_PROTO1; //set to avoid loops
+
+ error = ifnet_output_raw(dst_ifp, 0, m);
+ if (error == 0) {
+ (void) ifnet_stat_increment_out(dst_ifp, 1, len, 0);
+ } else {
+ (void) ifnet_stat_increment_out(dst_ifp, 0, 0, 1);
}
}
-void
-bstp_make_forwarding(__unused struct bridge_softc *sc,
- struct bridge_iflist *bif)
+static int
+bstp_pdu_flags(struct bstp_port *bp)
{
- if (bif->bif_state == BSTP_IFSTATE_BLOCKING) {
- bstp_set_port_state(bif, BSTP_IFSTATE_LISTENING);
- bstp_timer_start(&bif->bif_forward_delay_timer, 0);
- }
-}
+ int flags = 0;
-void
-bstp_make_blocking(struct bridge_softc *sc, struct bridge_iflist *bif)
-{
- if ((bif->bif_state != BSTP_IFSTATE_DISABLED) &&
- (bif->bif_state != BSTP_IFSTATE_BLOCKING)) {
- if ((bif->bif_state == BSTP_IFSTATE_FORWARDING) ||
- (bif->bif_state == BSTP_IFSTATE_LEARNING)) {
- if (bif->bif_change_detection_enabled) {
- bstp_topology_change_detection(sc);
- }
- }
- bstp_set_port_state(bif, BSTP_IFSTATE_BLOCKING);
- bstp_timer_stop(&bif->bif_forward_delay_timer);
- }
-}
+ if (bp->bp_proposing && bp->bp_state != BSTP_IFSTATE_FORWARDING)
+ flags |= BSTP_PDU_F_P;
-void
-bstp_set_port_state(struct bridge_iflist *bif, uint8_t state)
-{
- bif->bif_state = state;
-}
+ if (bp->bp_agree)
+ flags |= BSTP_PDU_F_A;
-void
-bstp_topology_change_detection(struct bridge_softc *sc)
-{
- if (bstp_root_bridge(sc)) {
- sc->sc_topology_change = 1;
- bstp_timer_start(&sc->sc_topology_change_timer, 0);
- } else if (!sc->sc_topology_change_detected) {
- bstp_transmit_tcn(sc);
- bstp_timer_start(&sc->sc_tcn_timer, 0);
+ 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;
}
- sc->sc_topology_change_detected = 1;
-}
-void
-bstp_topology_change_acknowledged(struct bridge_softc *sc)
-{
- sc->sc_topology_change_detected = 0;
- bstp_timer_stop(&sc->sc_tcn_timer);
-}
+ switch (bp->bp_role) {
+ case BSTP_ROLE_ROOT:
+ flags |=
+ (BSTP_PDU_F_ROOT << BSTP_PDU_PRSHIFT);
+ break;
-void
-bstp_acknowledge_topology_change(struct bridge_softc *sc,
- struct bridge_iflist *bif)
-{
- bif->bif_topology_change_acknowledge = 1;
- bstp_transmit_config(sc, bif);
+ case BSTP_ROLE_ALTERNATE:
+ case BSTP_ROLE_BACKUP: /* fall through */
+ 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);
}
-__private_extern__ struct mbuf *
-bstp_input(struct bridge_softc *sc, struct ifnet *ifp, struct mbuf *m)
+struct mbuf *
+bstp_input(struct bstp_port *bp, __unused struct ifnet *ifp, struct mbuf *m)
{
- struct bridge_iflist *bif = NULL;
+ struct bstp_state *bs = bp->bp_bs;
struct ether_header *eh;
struct bstp_tbpdu tpdu;
- struct bstp_cbpdu cpdu;
- struct bstp_config_unit cu;
- struct bstp_tcn_unit tu;
uint16_t len;
- eh = mtod(m, struct ether_header *);
-
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bif->bif_ifp == ifp)
- break;
+ if (bp->bp_active == 0) {
+ m_freem(m);
+ return (NULL);
}
- if (bif == NULL)
- goto out;
+
+ BSTP_LOCK(bs);
+
+ eh = mtod(m, struct ether_header *);
len = ntohs(eh->ether_type);
if (len < sizeof(tpdu))
if (m->m_pkthdr.len > len)
m_adj(m, len - m->m_pkthdr.len);
- if ((size_t)m->m_len < sizeof(tpdu) &&
+ if ((unsigned int)m->m_len < sizeof(tpdu) &&
(m = m_pullup(m, sizeof(tpdu))) == NULL)
goto out;
memcpy(&tpdu, mtod(m, caddr_t), sizeof(tpdu));
+ /* basic packet checks */
if (tpdu.tbu_dsap != LLC_8021D_LSAP ||
tpdu.tbu_ssap != LLC_8021D_LSAP ||
tpdu.tbu_ctl != LLC_UI)
goto out;
- if (tpdu.tbu_protoid != 0 || tpdu.tbu_protover != 0)
+ if (tpdu.tbu_protoid != BSTP_PROTO_ID)
goto out;
- switch (tpdu.tbu_bpdutype) {
- case BSTP_MSGTYPE_TCN:
- tu.tu_message_type = tpdu.tbu_bpdutype;
- bstp_received_tcn_bpdu(sc, bif, &tu);
- break;
- case BSTP_MSGTYPE_CFG:
- if ((size_t)m->m_len < sizeof(cpdu) &&
- (m = m_pullup(m, sizeof(cpdu))) == NULL)
+ /*
+ * 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;
- memcpy(&cpdu, mtod(m, caddr_t), sizeof(cpdu));
-
- cu.cu_rootid =
- (((uint64_t)ntohs(cpdu.cbu_rootpri)) << 48) |
- (((uint64_t)cpdu.cbu_rootaddr[0]) << 40) |
- (((uint64_t)cpdu.cbu_rootaddr[1]) << 32) |
- (((uint64_t)cpdu.cbu_rootaddr[2]) << 24) |
- (((uint64_t)cpdu.cbu_rootaddr[3]) << 16) |
- (((uint64_t)cpdu.cbu_rootaddr[4]) << 8) |
- (((uint64_t)cpdu.cbu_rootaddr[5]) << 0);
-
- cu.cu_bridge_id =
- (((uint64_t)ntohs(cpdu.cbu_bridgepri)) << 48) |
- (((uint64_t)cpdu.cbu_bridgeaddr[0]) << 40) |
- (((uint64_t)cpdu.cbu_bridgeaddr[1]) << 32) |
- (((uint64_t)cpdu.cbu_bridgeaddr[2]) << 24) |
- (((uint64_t)cpdu.cbu_bridgeaddr[3]) << 16) |
- (((uint64_t)cpdu.cbu_bridgeaddr[4]) << 8) |
- (((uint64_t)cpdu.cbu_bridgeaddr[5]) << 0);
-
- cu.cu_root_path_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_port_id = ntohs(cpdu.cbu_portid);
- cu.cu_message_type = cpdu.cbu_bpdutype;
- cu.cu_topology_change_acknowledgment =
- (cpdu.cbu_flags & BSTP_FLAG_TCA) ? 1 : 0;
- cu.cu_topology_change =
- (cpdu.cbu_flags & BSTP_FLAG_TC) ? 1 : 0;
- bstp_received_config_bpdu(sc, bif, &cu);
- break;
- default:
- goto out;
}
- 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:
+ BSTP_UNLOCK(bs);
if (m)
m_freem(m);
return (NULL);
}
-void
-bstp_received_config_bpdu(struct bridge_softc *sc, struct bridge_iflist *bif,
- struct bstp_config_unit *cu)
+static void
+bstp_received_stp(struct bstp_state *bs, struct bstp_port *bp,
+ struct mbuf **mp, struct bstp_tbpdu *tpdu)
{
- int root;
+ struct bstp_cbpdu cpdu;
+ struct bstp_config_unit *cu = &bp->bp_msg_cu;
+ struct bstp_tcn_unit tu;
- root = bstp_root_bridge(sc);
+ 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);
- if (bif->bif_state != BSTP_IFSTATE_DISABLED) {
- if (bstp_supersedes_port_info(sc, bif, cu)) {
- bstp_record_config_information(sc, bif, cu);
- bstp_configuration_update(sc);
- bstp_port_state_selection(sc);
+ bstp_decode_bpdu(bp, &cpdu, cu);
+ bstp_received_bpdu(bs, bp, cu);
+ break;
+ }
+}
- if ((bstp_root_bridge(sc) == 0) && root) {
- bstp_timer_stop(&sc->sc_hello_timer);
+static 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 (sc->sc_topology_change_detected) {
- bstp_timer_stop(
- &sc->sc_topology_change_timer);
- bstp_transmit_tcn(sc);
- bstp_timer_start(&sc->sc_tcn_timer, 0);
- }
- }
+ if (tpdu->tbu_bpdutype != BSTP_MSGTYPE_RSTP)
+ return;
- if (bif == sc->sc_root_port) {
- bstp_record_config_timeout_values(sc, cu);
- bstp_config_bpdu_generation(sc);
+ 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);
- if (cu->cu_topology_change_acknowledgment)
- bstp_topology_change_acknowledged(sc);
- }
- } else if (bstp_designated_port(sc, bif))
- bstp_transmit_config(sc, bif);
- }
+ bstp_decode_bpdu(bp, &cpdu, cu);
+ bstp_received_bpdu(bs, bp, cu);
}
-void
-bstp_received_tcn_bpdu(struct bridge_softc *sc, struct bridge_iflist *bif,
+static void
+bstp_received_tcn(__unused struct bstp_state *bs, struct bstp_port *bp,
__unused struct bstp_tcn_unit *tcn)
{
- if (bif->bif_state != BSTP_IFSTATE_DISABLED &&
- bstp_designated_port(sc, bif)) {
- bstp_topology_change_detection(sc);
- bstp_acknowledge_topology_change(sc, bif);
- }
+ bp->bp_rcvdtcn = 1;
+ bstp_update_tc(bp);
}
-void
-bstp_hello_timer_expiry(struct bridge_softc *sc)
+static void
+bstp_received_bpdu(struct bstp_state *bs, struct bstp_port *bp,
+ struct bstp_config_unit *cu)
{
- bstp_config_bpdu_generation(sc);
- bstp_timer_start(&sc->sc_hello_timer, 0);
-}
+ int type;
-void
-bstp_message_age_timer_expiry(struct bridge_softc *sc,
- struct bridge_iflist *bif)
-{
- int root;
+ BSTP_LOCK_ASSERT(bs);
+
+ /* We need to have transitioned to INFO_MINE before proceeding */
+ switch (bp->bp_infois) {
+ case BSTP_INFO_DISABLED:
+ case BSTP_INFO_AGED:
+ return;
+ }
- root = bstp_root_bridge(sc);
- bstp_become_designated_port(sc, bif);
- bstp_configuration_update(sc);
- bstp_port_state_selection(sc);
+ 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;
- if ((bstp_root_bridge(sc)) && (root == 0)) {
- sc->sc_max_age = sc->sc_bridge_max_age;
- sc->sc_hello_time = sc->sc_bridge_hello_time;
- sc->sc_forward_delay = sc->sc_bridge_forward_delay;
+ 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;
- bstp_topology_change_detection(sc);
- bstp_timer_stop(&sc->sc_tcn_timer);
- bstp_config_bpdu_generation(sc);
- bstp_timer_start(&sc->sc_hello_timer, 0);
- }
-}
+ /* rearm the age timer */
+ bstp_set_timer_msgage(bp);
+ break;
-void
-bstp_forward_delay_timer_expiry(struct bridge_softc *sc,
- struct bridge_iflist *bif)
-{
- if (bif->bif_state == BSTP_IFSTATE_LISTENING) {
- bstp_set_port_state(bif, BSTP_IFSTATE_LEARNING);
- bstp_timer_start(&bif->bif_forward_delay_timer, 0);
- } else if (bif->bif_state == BSTP_IFSTATE_LEARNING) {
- bstp_set_port_state(bif, BSTP_IFSTATE_FORWARDING);
- if (bstp_designated_for_some_port(sc) &&
- bif->bif_change_detection_enabled)
- bstp_topology_change_detection(sc);
+ 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_designated_for_some_port(struct bridge_softc *sc)
+static 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;
- struct bridge_iflist *bif;
+ break;
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bif->bif_designated_bridge == sc->sc_bridge_id)
- return (1);
+ 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 (0);
+
+ return (type);
}
-void
-bstp_tcn_timer_expiry(struct bridge_softc *sc)
+static int
+bstp_pdu_bettersame(struct bstp_port *bp, int newinfo)
{
- bstp_transmit_tcn(sc);
- bstp_timer_start(&sc->sc_tcn_timer, 0);
+ 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);
}
-void
-bstp_topology_change_timer_expiry(struct bridge_softc *sc)
+static int
+bstp_info_cmp(struct bstp_pri_vector *pv,
+ struct bstp_pri_vector *cpv)
{
- sc->sc_topology_change_detected = 0;
- sc->sc_topology_change = 0;
+ 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);
}
-void
-bstp_hold_timer_expiry(struct bridge_softc *sc, struct bridge_iflist *bif)
+/*
+ * 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.
+ */
+static int
+bstp_info_superior(struct bstp_pri_vector *pv,
+ struct bstp_pri_vector *cpv)
{
- if (bif->bif_config_pending)
- bstp_transmit_config(sc, bif);
+ 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);
}
-__private_extern__ void
-bstp_initialization(struct bridge_softc *sc)
+static void
+bstp_assign_roles(struct bstp_state *bs)
{
- struct bridge_iflist *bif, *mif;
- struct timespec ts;
- unsigned char *lladdr;
-
- lck_mtx_assert(sc->sc_mtx, LCK_MTX_ASSERT_OWNED);
-
- mif = NULL;
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
+ struct bstp_port *bp, *rbp = NULL;
+ struct bstp_pri_vector pv;
+
+ /* 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;
+
+ /* check if any recieved info supersedes us */
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
+ if (bp->bp_infois != BSTP_INFO_RECEIVED)
continue;
- if (bif->bif_ifp->if_type != IFT_ETHER)
- continue;
- bif->bif_port_id = (bif->bif_priority << 8) |
- (bif->bif_ifp->if_index & 0xff);
- if (mif == NULL) {
- mif = bif;
- 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;
}
- if (memcmp(ifnet_lladdr(bif->bif_ifp),
- ifnet_lladdr(mif->bif_ifp), ETHER_ADDR_LEN) < 0) {
- mif = bif;
- continue;
+ }
+
+ 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;
}
}
- if (mif == NULL) {
- bstp_stop(sc);
- return;
+}
+
+static void
+bstp_update_state(struct bstp_state *bs, struct bstp_port *bp)
+{
+ struct bstp_port *bp2;
+ int synced;
+
+ BSTP_LOCK_ASSERT(bs);
+
+ /* check if all the ports have syncronised 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;
}
- lladdr = ifnet_lladdr(mif->bif_ifp);
- sc->sc_bridge_id =
- (((uint64_t)sc->sc_bridge_priority) << 48) |
- (((uint64_t)lladdr[0]) << 40) |
- (((uint64_t)lladdr[1]) << 32) |
- (lladdr[2] << 24) |
- (lladdr[3] << 16) |
- (lladdr[4] << 8) |
- (lladdr[5]);
-
- sc->sc_designated_root = sc->sc_bridge_id;
- sc->sc_root_path_cost = 0;
- sc->sc_root_port = NULL;
-
- sc->sc_max_age = sc->sc_bridge_max_age;
- sc->sc_hello_time = sc->sc_bridge_hello_time;
- sc->sc_forward_delay = sc->sc_bridge_forward_delay;
- sc->sc_topology_change_detected = 0;
- sc->sc_topology_change = 0;
- bstp_timer_stop(&sc->sc_tcn_timer);
- bstp_timer_stop(&sc->sc_topology_change_timer);
-
- bsd_untimeout(bstp_tick, sc);
- ts.tv_sec = 1;
- ts.tv_nsec = 0;
- bsd_timeout(bstp_tick, sc, &ts);
+ bstp_update_roles(bs, bp);
+ bstp_update_tc(bp);
+}
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if (bif->bif_flags & IFBIF_STP)
- bstp_enable_port(sc, bif);
- else
- bstp_disable_port(sc, bif);
+static 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("%s -> ALTERNATE_AGREED\n",
+ bp->bp_ifp->if_xname);
+ }
+
+ if (bp->bp_proposed && !bp->bp_agree) {
+ bstp_set_all_sync(bs);
+ bp->bp_proposed = 0;
+ DPRINTF("%s -> ALTERNATE_PROPOSED\n",
+ bp->bp_ifp->if_xname);
+ }
+
+ /* 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("%s -> ALTERNATE_PORT\n", bp->bp_ifp->if_xname);
+ }
+ break;
+
+ case BSTP_ROLE_ROOT:
+ if (bp->bp_state != BSTP_IFSTATE_FORWARDING && !bp->bp_reroot) {
+ bstp_set_all_reroot(bs);
+ DPRINTF("%s -> ROOT_REROOT\n", bp->bp_ifp->if_xname);
+ }
+
+ 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("%s -> ROOT_AGREED\n", bp->bp_ifp->if_xname);
+ }
+
+ if (bp->bp_proposed && !bp->bp_agree) {
+ bstp_set_all_sync(bs);
+ bp->bp_proposed = 0;
+ DPRINTF("%s -> ROOT_PROPOSED\n", bp->bp_ifp->if_xname);
+ }
+
+ 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("%s -> ROOT_REROOTED\n", bp->bp_ifp->if_xname);
+ }
+ break;
+
+ case BSTP_ROLE_DESIGNATED:
+ if (bp->bp_recent_root_timer.active == 0 && bp->bp_reroot) {
+ bp->bp_reroot = 0;
+ DPRINTF("%s -> DESIGNATED_RETIRED\n",
+ bp->bp_ifp->if_xname);
+ }
+
+ 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("%s -> DESIGNATED_SYNCED\n",
+ bp->bp_ifp->if_xname);
+ }
+
+ 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("%s -> DESIGNATED_PROPOSE\n",
+ bp->bp_ifp->if_xname);
+ }
+
+ 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) {
+#ifdef BRIDGESTP_DEBUG
+ if (bp->bp_agreed)
+ DPRINTF("%s -> AGREED\n", bp->bp_ifp->if_xname);
+#endif /* BRIDGESTP_DEBUG */
+ /*
+ * 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("%s -> DESIGNATED_DISCARD\n",
+ bp->bp_ifp->if_xname);
+ }
+ break;
}
- bstp_port_state_selection(sc);
- bstp_config_bpdu_generation(sc);
- bstp_timer_start(&sc->sc_hello_timer, 0);
+ if (bp->bp_flags & BSTP_PORT_NEWINFO)
+ bstp_transmit(bs, bp);
}
-__private_extern__ void
-bstp_stop(struct bridge_softc *sc)
+static void
+bstp_update_tc(struct bstp_port *bp)
{
- struct bridge_iflist *bif;
+ 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;
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- bstp_set_port_state(bif, BSTP_IFSTATE_DISABLED);
- bstp_timer_stop(&bif->bif_hold_timer);
- bstp_timer_stop(&bif->bif_message_age_timer);
- bstp_timer_stop(&bif->bif_forward_delay_timer);
+ 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("Invalid TC state for %s\n",
+ bp->bp_ifp->if_xname);
+ break;
}
- bsd_untimeout(bstp_tick, sc);
+}
+
+static void
+bstp_update_info(struct bstp_port *bp)
+{
+ struct bstp_state *bs = bp->bp_bs;
+
+ bp->bp_proposing = 0;
+ bp->bp_proposed = 0;
- bstp_timer_stop(&sc->sc_topology_change_timer);
- bstp_timer_stop(&sc->sc_tcn_timer);
- bstp_timer_stop(&sc->sc_hello_timer);
+ 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;
}
-void
-bstp_initialize_port(struct bridge_softc *sc, struct bridge_iflist *bif)
+/* set tcprop on every port other than the caller */
+static void
+bstp_set_other_tcprop(struct bstp_port *bp)
{
- bstp_become_designated_port(sc, bif);
- bstp_set_port_state(bif, BSTP_IFSTATE_BLOCKING);
- bif->bif_topology_change_acknowledge = 0;
- bif->bif_config_pending = 0;
- bif->bif_change_detection_enabled = 1;
- bstp_timer_stop(&bif->bif_message_age_timer);
- bstp_timer_stop(&bif->bif_forward_delay_timer);
- bstp_timer_stop(&bif->bif_hold_timer);
+ struct bstp_state *bs = bp->bp_bs;
+ struct bstp_port *bp2;
+
+ BSTP_LOCK_ASSERT(bs);
+
+ LIST_FOREACH(bp2, &bs->bs_bplist, bp_next) {
+ if (bp2 == bp)
+ continue;
+ bp2->bp_tc_prop = 1;
+ }
}
-void
-bstp_enable_port(struct bridge_softc *sc, struct bridge_iflist *bif)
+static void
+bstp_set_all_reroot(struct bstp_state *bs)
{
- bstp_initialize_port(sc, bif);
- bstp_port_state_selection(sc);
+ struct bstp_port *bp;
+
+ BSTP_LOCK_ASSERT(bs);
+
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
+ bp->bp_reroot = 1;
}
-void
-bstp_disable_port(struct bridge_softc *sc, struct bridge_iflist *bif)
-{
- int root;
-
- root = bstp_root_bridge(sc);
- bstp_become_designated_port(sc, bif);
- bstp_set_port_state(bif, BSTP_IFSTATE_DISABLED);
- bif->bif_topology_change_acknowledge = 0;
- bif->bif_config_pending = 0;
- bstp_timer_stop(&bif->bif_message_age_timer);
- bstp_timer_stop(&bif->bif_forward_delay_timer);
- bstp_configuration_update(sc);
- bstp_port_state_selection(sc);
-
- if (bstp_root_bridge(sc) && (root == 0)) {
- sc->sc_max_age = sc->sc_bridge_max_age;
- sc->sc_hello_time = sc->sc_bridge_hello_time;
- sc->sc_forward_delay = sc->sc_bridge_forward_delay;
-
- bstp_topology_change_detection(sc);
- bstp_timer_stop(&sc->sc_tcn_timer);
- bstp_config_bpdu_generation(sc);
- bstp_timer_start(&sc->sc_hello_timer, 0);
+static void
+bstp_set_all_sync(struct bstp_state *bs)
+{
+ struct bstp_port *bp;
+
+ BSTP_LOCK_ASSERT(bs);
+
+ 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_bridge_priority(struct bridge_softc *sc, uint64_t new_bridge_id)
+static 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("state changed to DISCARDING on %s\n",
+ bp->bp_ifp->if_xname);
+ break;
+
+ case BSTP_IFSTATE_LEARNING:
+ DPRINTF("state changed to LEARNING on %s\n",
+ bp->bp_ifp->if_xname);
+
+ 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("state changed to FORWARDING on %s\n",
+ bp->bp_ifp->if_xname);
+
+ bstp_timer_stop(&bp->bp_forward_delay_timer);
+ /* Record that we enabled forwarding */
+ bp->bp_forward_transitions++;
+ break;
+ }
+
+ /* notify the parent bridge */
+ bstp_task_enqueue(&bp->bp_statetask);
+}
+
+static void
+bstp_set_port_role(struct bstp_port *bp, int role)
{
- struct bridge_iflist *bif;
- int root;
+ 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);
+ /* fall through */
+ 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;
- root = bstp_root_bridge(sc);
+ 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("%s role -> ALT/BACK/DISABLED\n",
+ bp->bp_ifp->if_xname);
+ 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;
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
+ case BSTP_ROLE_ROOT:
+ DPRINTF("%s role -> ROOT\n",
+ bp->bp_ifp->if_xname);
+ 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("%s role -> DESIGNATED\n",
+ bp->bp_ifp->if_xname);
+ 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);
+}
+
+static 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;
+ /* STP compat mode only uses 16 bits of the 32 */
+ if (bp->bp_path_cost > 65535)
+ bp->bp_path_cost = 65535;
+ break;
+
+ case BSTP_PROTO_RSTP:
+ bstp_timer_start(&bp->bp_migrate_delay_timer,
+ bs->bs_migration_delay);
+ break;
+
+ default:
+ DPRINTF("Unsupported STP version %d\n", proto);
+ return;
+ }
+
+ bp->bp_protover = proto;
+ bp->bp_flags &= ~BSTP_PORT_CANMIGRATE;
+}
+
+static 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("%s -> TC_ACTIVE\n", bp->bp_ifp->if_xname);
+ /* 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_task_enqueue(&bp->bp_rtagetask);
+ bp->bp_tc_ack = 0;
+ DPRINTF("%s -> TC_INACTIVE\n", bp->bp_ifp->if_xname);
+ break;
+
+ case BSTP_TCSTATE_LEARNING:
+ bp->bp_rcvdtc = 0;
+ bp->bp_rcvdtcn = 0;
+ bp->bp_rcvdtca = 0;
+ bp->bp_tc_prop = 0;
+ DPRINTF("%s -> TC_LEARNING\n", bp->bp_ifp->if_xname);
+ 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);
+ /* reviewed for getmicrotime usage */
+ getmicrotime(&bs->bs_last_tc_time);
+ DPRINTF("%s -> TC_DETECTED\n", bp->bp_ifp->if_xname);
+ bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
+ break;
+
+ case BSTP_TCSTATE_TCN:
+ bstp_set_timer_tc(bp);
+ DPRINTF("%s -> TC_TCN\n", bp->bp_ifp->if_xname);
+ /* fall through */
+ 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("%s -> TC_TC\n", bp->bp_ifp->if_xname);
+ bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
+ break;
+
+ case BSTP_TCSTATE_PROPAG:
+ /* flush routes on the parent bridge */
+ bp->bp_fdbflush = 1;
+ bstp_task_enqueue(&bp->bp_rtagetask);
+ bp->bp_tc_prop = 0;
+ bstp_set_timer_tc(bp);
+ DPRINTF("%s -> TC_PROPAG\n", bp->bp_ifp->if_xname);
+ bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
+ break;
+
+ case BSTP_TCSTATE_ACK:
+ bstp_timer_stop(&bp->bp_tc_timer);
+ bp->bp_rcvdtca = 0;
+ DPRINTF("%s -> TC_ACK\n", bp->bp_ifp->if_xname);
+ bp->bp_tcstate = BSTP_TCSTATE_ACTIVE; /* UCT */
+ break;
+ }
+}
+
+static 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;
+ }
+}
+
+static 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);
+}
+
+static 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 (bstp_designated_port(sc, bif))
- bif->bif_designated_bridge = new_bridge_id;
+ if (bp2->bp_recent_root_timer.active) {
+ rr_set = 1;
+ break;
+ }
}
+ return (!rr_set);
+}
- sc->sc_bridge_id = new_bridge_id;
+int
+bstp_set_htime(struct bstp_state *bs, int t)
+{
+ /* convert seconds to ticks */
+ t *= BSTP_TICK_VAL;
- bstp_configuration_update(sc);
- bstp_port_state_selection(sc);
+ /* value can only be changed in leagacy stp mode */
+ if (bs->bs_protover != BSTP_PROTO_STP)
+ return (EPERM);
- if (bstp_root_bridge(sc) && (root == 0)) {
- sc->sc_max_age = sc->sc_bridge_max_age;
- sc->sc_hello_time = sc->sc_bridge_hello_time;
- sc->sc_forward_delay = sc->sc_bridge_forward_delay;
+ if (t < BSTP_MIN_HELLO_TIME || t > BSTP_MAX_HELLO_TIME)
+ return (EINVAL);
- bstp_topology_change_detection(sc);
- bstp_timer_stop(&sc->sc_tcn_timer);
- bstp_config_bpdu_generation(sc);
- bstp_timer_start(&sc->sc_hello_timer, 0);
+ BSTP_LOCK(bs);
+ bs->bs_bridge_htime = t;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_fdelay(struct bstp_state *bs, int t)
+{
+ /* convert seconds to ticks */
+ t *= BSTP_TICK_VAL;
+
+ if (t < BSTP_MIN_FORWARD_DELAY || t > BSTP_MAX_FORWARD_DELAY)
+ return (EINVAL);
+
+ BSTP_LOCK(bs);
+ bs->bs_bridge_fdelay = t;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_maxage(struct bstp_state *bs, int t)
+{
+ /* convert seconds to ticks */
+ t *= BSTP_TICK_VAL;
+
+ if (t < BSTP_MIN_MAX_AGE || t > BSTP_MAX_MAX_AGE)
+ return (EINVAL);
+
+ BSTP_LOCK(bs);
+ bs->bs_bridge_max_age = t;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_holdcount(struct bstp_state *bs, int count)
+{
+ struct bstp_port *bp;
+
+ if (count < BSTP_MIN_HOLD_COUNT ||
+ count > BSTP_MAX_HOLD_COUNT)
+ return (EINVAL);
+
+ BSTP_LOCK(bs);
+ bs->bs_txholdcount = count;
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
+ bp->bp_txcount = 0;
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_protocol(struct bstp_state *bs, int proto)
+{
+ struct bstp_port *bp;
+
+ switch (proto) {
+ /* Supported protocol versions */
+ case BSTP_PROTO_STP:
+ case BSTP_PROTO_RSTP:
+ break;
+
+ default:
+ return (EINVAL);
}
+
+ BSTP_LOCK(bs);
+ bs->bs_protover = proto;
+ 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);
+ }
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
}
-void
-bstp_set_port_priority(struct bridge_softc *sc, struct bridge_iflist *bif,
- uint16_t new_port_id)
+int
+bstp_set_priority(struct bstp_state *bs, int pri)
+{
+ if (pri < 0 || pri > BSTP_MAX_PRIORITY)
+ return (EINVAL);
+
+ /* Limit to steps of 4096 */
+ pri -= pri % 4096;
+
+ BSTP_LOCK(bs);
+ bs->bs_bridge_priority = pri;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_port_priority(struct bstp_port *bp, int pri)
{
- if (bstp_designated_port(sc, bif))
- bif->bif_designated_port = new_port_id;
+ struct bstp_state *bs = bp->bp_bs;
+
+ if (pri < 0 || pri > BSTP_MAX_PORT_PRIORITY)
+ return (EINVAL);
- bif->bif_port_id = new_port_id;
+ /* Limit to steps of 16 */
+ pri -= pri % 16;
- if ((sc->sc_bridge_id == bif->bif_designated_bridge) &&
- (bif->bif_port_id < bif->bif_designated_port)) {
- bstp_become_designated_port(sc, bif);
- bstp_port_state_selection(sc);
+ BSTP_LOCK(bs);
+ bp->bp_priority = pri;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_path_cost(struct bstp_port *bp, uint32_t path_cost)
+{
+ struct bstp_state *bs = bp->bp_bs;
+
+ if (path_cost > BSTP_MAX_PATH_COST)
+ return (EINVAL);
+
+ /* STP compat mode only uses 16 bits of the 32 */
+ if (bp->bp_protover == BSTP_PROTO_STP && path_cost > 65535)
+ path_cost = 65535;
+
+ BSTP_LOCK(bs);
+
+ if (path_cost == 0) { /* use auto */
+ bp->bp_flags &= ~BSTP_PORT_ADMCOST;
+ bp->bp_path_cost = bstp_calc_path_cost(bp);
+ } else {
+ bp->bp_path_cost = path_cost;
+ bp->bp_flags |= BSTP_PORT_ADMCOST;
}
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+ return (0);
}
-void
-bstp_set_path_cost(struct bridge_softc *sc, struct bridge_iflist *bif,
- uint32_t path_cost)
+int
+bstp_set_edge(struct bstp_port *bp, int set)
+{
+ struct bstp_state *bs = bp->bp_bs;
+
+ BSTP_LOCK(bs);
+ if ((bp->bp_operedge = set) == 0)
+ bp->bp_flags &= ~BSTP_PORT_ADMEDGE;
+ else
+ bp->bp_flags |= BSTP_PORT_ADMEDGE;
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_set_autoedge(struct bstp_port *bp, int set)
{
- bif->bif_path_cost = path_cost;
- bstp_configuration_update(sc);
- bstp_port_state_selection(sc);
+ struct bstp_state *bs = bp->bp_bs;
+
+ BSTP_LOCK(bs);
+ if (set) {
+ 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;
+ BSTP_UNLOCK(bs);
+ return (0);
}
-void
-bstp_enable_change_detection(struct bridge_iflist *bif)
+int
+bstp_set_ptp(struct bstp_port *bp, int set)
{
- bif->bif_change_detection_enabled = 1;
+ struct bstp_state *bs = bp->bp_bs;
+
+ BSTP_LOCK(bs);
+ bp->bp_ptp_link = set;
+ BSTP_UNLOCK(bs);
+ return (0);
}
-void
-bstp_disable_change_detection(struct bridge_iflist *bif)
+int
+bstp_set_autoptp(struct bstp_port *bp, int set)
+{
+ struct bstp_state *bs = bp->bp_bs;
+
+ BSTP_LOCK(bs);
+ if (set) {
+ bp->bp_flags |= BSTP_PORT_AUTOPTP;
+ if (bp->bp_role != BSTP_ROLE_DISABLED)
+ bstp_ifupdstatus(bs, bp);
+ } else
+ bp->bp_flags &= ~BSTP_PORT_AUTOPTP;
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+/*
+ * Calculate the path cost according to the link speed.
+ */
+static uint32_t
+bstp_calc_path_cost(struct bstp_port *bp)
+{
+ struct ifnet *ifp = bp->bp_ifp;
+ uint32_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 (bp->bp_if_link_state == LINK_STATE_DOWN) {
+ /* Recalc when the link comes up again */
+ bp->bp_flags |= BSTP_PORT_PNDCOST;
+ return (BSTP_DEFAULT_PATH_COST);
+ }
+
+ if (ifp->if_baudrate < 1000)
+ return (BSTP_DEFAULT_PATH_COST);
+
+ /* formula from section 17.14, IEEE Std 802.1D-2004 */
+ path_cost = 20000000000ULL / (ifp->if_baudrate / 1000);
+
+ 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);
+}
+
+/*
+ * Notify the bridge that a port state has changed, we need to do this from a
+ * taskqueue to avoid a LOR.
+ */
+static void
+bstp_notify_state(void *arg, __unused int pending)
+{
+ struct bstp_port *bp = (struct bstp_port *)arg;
+ struct bstp_state *bs = bp->bp_bs;
+
+ if (bp->bp_active == 1 && bs->bs_state_cb != NULL)
+ (*bs->bs_state_cb)(bp->bp_ifp, bp->bp_state);
+}
+
+/*
+ * Flush the routes on the bridge port, we need to do this from a
+ * taskqueue to avoid a LOR.
+ */
+static void
+bstp_notify_rtage(void *arg, __unused int pending)
{
- bif->bif_change_detection_enabled = 0;
+ struct bstp_port *bp = (struct bstp_port *)arg;
+ struct bstp_state *bs = bp->bp_bs;
+ int age = 0;
+
+ BSTP_LOCK(bs);
+ 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;
+ }
+ BSTP_UNLOCK(bs);
+
+ if (bp->bp_active == 1 && bs->bs_rtage_cb != NULL)
+ (*bs->bs_rtage_cb)(bp->bp_ifp, age);
+
+ /* flush is complete */
+ BSTP_LOCK(bs);
+ bp->bp_fdbflush = 0;
+ BSTP_UNLOCK(bs);
}
void
-bstp_ifupdstatus(struct bridge_softc *sc, struct bridge_iflist *bif)
-{
- struct ifnet *ifp = bif->bif_ifp;
- struct ifmediareq ifmr;
-
- if ((ifnet_flags(ifp) & IFF_UP)) {
- bzero(&ifmr, sizeof(ifmr));
- if (ifnet_ioctl(ifp, 0, SIOCGIFMEDIA, &ifmr) == 0) {
- // enable the port when the link is up, or its state is unknown
- if ((ifmr.ifm_status & IFM_ACTIVE) || !(ifmr.ifm_status & IFM_AVALID)) {
- if (bif->bif_state == BSTP_IFSTATE_DISABLED)
- bstp_enable_port(sc, bif);
- } else {
- if (bif->bif_state != BSTP_IFSTATE_DISABLED)
- bstp_disable_port(sc, bif);
+bstp_linkstate(struct ifnet *ifp, __unused int state)
+{
+ struct bstp_state *bs;
+ struct bstp_port *bp;
+
+ /* search for the stp port */
+ lck_mtx_lock(bstp_list_mtx);
+ LIST_FOREACH(bs, &bstp_list, bs_list) {
+ BSTP_LOCK(bs);
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
+ if (bp->bp_ifp == ifp) {
+ bstp_ifupdstatus(bs, bp);
+ bstp_update_state(bs, bp);
+ /* it only exists once so return */
+ BSTP_UNLOCK(bs);
+ lck_mtx_unlock(bstp_list_mtx);
+ return;
+ }
+ }
+ BSTP_UNLOCK(bs);
+ }
+ lck_mtx_unlock(bstp_list_mtx);
+}
+
+static void
+bstp_ifupdstatus(struct bstp_state *bs, struct bstp_port *bp)
+{
+ struct ifnet *ifp = bp->bp_ifp;
+ struct ifmediareq ifmr;
+ int error = 0;
+
+ BSTP_LOCK_ASSERT(bs);
+
+ bzero((char *)&ifmr, sizeof(ifmr));
+ error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
+
+ if ((error == 0) && (ifp->if_flags & IFF_UP)) {
+ if (ifmr.ifm_status & IFM_ACTIVE) {
+ /* A full-duplex link is assumed to be point to point */
+ if (bp->bp_flags & BSTP_PORT_AUTOPTP) {
+ bp->bp_ptp_link =
+ ifmr.ifm_active & IFM_FDX ? 1 : 0;
+ }
+
+ /* Calc the cost if the link was down previously */
+ if (bp->bp_flags & BSTP_PORT_PNDCOST) {
+ bp->bp_path_cost = bstp_calc_path_cost(bp);
+ bp->bp_flags &= ~BSTP_PORT_PNDCOST;
+ }
+
+ if (bp->bp_role == BSTP_ROLE_DISABLED)
+ bstp_enable_port(bs, bp);
+ } else {
+ if (bp->bp_role != BSTP_ROLE_DISABLED) {
+ bstp_disable_port(bs, bp);
+ if ((bp->bp_flags & BSTP_PORT_ADMEDGE) &&
+ bp->bp_protover == BSTP_PROTO_RSTP)
+ bp->bp_operedge = 1;
}
}
return;
}
- if (bif->bif_state != BSTP_IFSTATE_DISABLED)
- bstp_disable_port(sc, bif);
+ if (bp->bp_infois != BSTP_INFO_DISABLED)
+ bstp_disable_port(bs, bp);
}
-void
+static void
+bstp_enable_port(struct bstp_state *bs, struct bstp_port *bp)
+{
+ bp->bp_infois = BSTP_INFO_AGED;
+ bstp_assign_roles(bs);
+}
+
+static void
+bstp_disable_port(struct bstp_state *bs, struct bstp_port *bp)
+{
+ bp->bp_infois = BSTP_INFO_DISABLED;
+ bstp_assign_roles(bs);
+}
+
+static void
bstp_tick(void *arg)
{
- struct bridge_softc *sc = arg;
- struct bridge_iflist *bif;
+ struct bstp_state *bs = arg;
+ struct bstp_port *bp;
struct timespec ts;
- lck_mtx_lock(sc->sc_mtx);
+ BSTP_LOCK(bs);
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- /*
- * XXX This can cause a lag in "link does away"
- * XXX and "spanning tree gets updated". We need
- * XXX come sort of callback from the link state
- * XXX update code to kick spanning tree.
- * XXX --thorpej@NetBSD.org
- */
- bstp_ifupdstatus(sc, bif);
+ if (bs->bs_running == 0)
+ 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);
}
- if (bstp_timer_expired(&sc->sc_hello_timer, sc->sc_hello_time))
- bstp_hello_timer_expiry(sc);
+ 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(&sc->sc_tcn_timer, sc->sc_bridge_hello_time))
- bstp_tcn_timer_expiry(sc);
+ if (bstp_timer_expired(&bp->bp_hello_timer))
+ bstp_hello_timer_expiry(bs, bp);
- if (bstp_timer_expired(&sc->sc_topology_change_timer,
- sc->sc_topology_change_time))
- bstp_topology_change_timer_expiry(sc);
+ if (bstp_timer_expired(&bp->bp_message_age_timer))
+ bstp_message_age_expiry(bs, bp);
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bstp_timer_expired(&bif->bif_message_age_timer,
- sc->sc_max_age))
- bstp_message_age_timer_expiry(sc, bif);
- }
+ if (bstp_timer_expired(&bp->bp_migrate_delay_timer))
+ bstp_migrate_delay_expiry(bs, bp);
- LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
- if ((bif->bif_flags & IFBIF_STP) == 0)
- continue;
- if (bstp_timer_expired(&bif->bif_forward_delay_timer,
- sc->sc_forward_delay))
- bstp_forward_delay_timer_expiry(sc, bif);
+ 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 (bstp_timer_expired(&bif->bif_hold_timer,
- sc->sc_hold_time))
- bstp_hold_timer_expiry(sc, bif);
+ if (bp->bp_txcount > 0)
+ bp->bp_txcount--;
}
- lck_mtx_unlock(sc->sc_mtx);
+ BSTP_UNLOCK(bs);
- /* APPLE MODIFICATION - bridge changes */
- if (ifnet_flags(sc->sc_if) & IFF_RUNNING) {
- ts.tv_sec = 1;
- ts.tv_nsec = 0;
- bsd_timeout(bstp_tick, sc, &ts);
- }
+ ts.tv_sec = 1;
+ ts.tv_nsec = 0;
+ bsd_timeout(bstp_tick, bs, &ts);
}
-void
-bstp_timer_start(struct bridge_timer *t, uint16_t v)
+static void
+bstp_timer_start(struct bstp_timer *t, uint16_t v)
{
t->value = v;
t->active = 1;
+ t->latched = 0;
}
-void
-bstp_timer_stop(struct bridge_timer *t)
+static void
+bstp_timer_stop(struct bstp_timer *t)
{
t->value = 0;
t->active = 0;
+ t->latched = 0;
}
-int
-bstp_timer_expired(struct bridge_timer *t, uint16_t v)
+static void
+bstp_timer_latch(struct bstp_timer *t)
+{
+ t->latched = 1;
+ t->active = 1;
+}
+
+static int
+bstp_timer_expired(struct bstp_timer *t)
{
- if (t->active == 0)
+ if (t->active == 0 || t->latched)
return (0);
- t->value += BSTP_TICK_VAL;
- if (t->value >= v) {
+ t->value -= BSTP_TICK_VAL;
+ if (t->value <= 0) {
bstp_timer_stop(t);
return (1);
}
return (0);
+}
+
+static 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);
+ }
+}
+
+static 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("aged info on %s\n", bp->bp_ifp->if_xname);
+ }
+}
+
+static void
+bstp_migrate_delay_expiry(__unused struct bstp_state *bs, struct bstp_port *bp)
+{
+ bp->bp_flags |= BSTP_PORT_CANMIGRATE;
+}
+static void
+bstp_edge_delay_expiry(__unused 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;
+ DPRINTF("%s -> edge port\n", bp->bp_ifp->if_xname);
+ }
+}
+
+static int
+bstp_addr_cmp(const uint8_t *a, const uint8_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
+ */
+static int
+bstp_same_bridgeid(uint64_t id1, uint64_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_reinit(struct bstp_state *bs)
+{
+ struct bstp_port *bp;
+ struct ifnet *ifp, *mif;
+ u_char *e_addr;
+ static const u_char llzero[ETHER_ADDR_LEN]; /* 00:00:00:00:00:00 */
+
+ BSTP_LOCK_ASSERT(bs);
+
+ mif = NULL;
+ /*
+ * Search through the Ethernet adapters and find the one with the
+ * lowest value. The adapter which we take the MAC address from does
+ * not need to be part of the bridge, it just needs to be a unique
+ * value.
+ */
+ ifnet_head_lock_shared();
+ TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
+ if (ifp->if_type != IFT_ETHER)
+ continue;
+
+ if (bstp_addr_cmp(IF_LLADDR(ifp), llzero) == 0)
+ continue;
+
+ if (mif == NULL) {
+ mif = ifp;
+ continue;
+ }
+ if (bstp_addr_cmp(IF_LLADDR(ifp), IF_LLADDR(mif)) < 0) {
+ mif = ifp;
+ continue;
+ }
+ }
+ ifnet_head_done();
+
+ if (LIST_EMPTY(&bs->bs_bplist) || mif == NULL) {
+ /* Set the bridge and root id (lower bits) to zero */
+ bs->bs_bridge_pv.pv_dbridge_id =
+ ((uint64_t)bs->bs_bridge_priority) << 48;
+ bs->bs_bridge_pv.pv_root_id = bs->bs_bridge_pv.pv_dbridge_id;
+ bs->bs_root_pv = bs->bs_bridge_pv;
+ /* Disable any remaining ports, they will have no MAC address */
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
+ bp->bp_infois = BSTP_INFO_DISABLED;
+ bstp_set_port_role(bp, BSTP_ROLE_DISABLED);
+ }
+ bsd_untimeout(bstp_tick, bs);
+ return;
+ }
+
+ e_addr = IF_LLADDR(mif);
+ bs->bs_bridge_pv.pv_dbridge_id =
+ (((uint64_t)bs->bs_bridge_priority) << 48) |
+ (((uint64_t)e_addr[0]) << 40) |
+ (((uint64_t)e_addr[1]) << 32) |
+ (((uint64_t)e_addr[2]) << 24) |
+ (((uint64_t)e_addr[3]) << 16) |
+ (((uint64_t)e_addr[4]) << 8) |
+ (((uint64_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 (bs->bs_running)
+ bsd_untimeout(bstp_tick, bs);
+
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next) {
+ bp->bp_port_id = (bp->bp_priority << 8) |
+ (bp->bp_ifp->if_index & 0xfff);
+ bstp_ifupdstatus(bs, bp);
+ }
+
+ bstp_assign_roles(bs);
+ bstp_timer_start(&bs->bs_link_timer, BSTP_LINK_TIMER);
+}
+
+void
+bstp_attach(struct bstp_state *bs, struct bstp_cb_ops *cb)
+{
+ BSTP_LOCK_INIT(bs);
+ 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;
+ bs->bs_state_cb = cb->bcb_state;
+ bs->bs_rtage_cb = cb->bcb_rtage;
+
+ /* reviewed for getmicrotime usage */
+ getmicrotime(&bs->bs_last_tc_time);
+
+ lck_mtx_lock(bstp_list_mtx);
+ LIST_INSERT_HEAD(&bstp_list, bs, bs_list);
+ lck_mtx_unlock(bstp_list_mtx);
+}
+
+void
+bstp_detach(struct bstp_state *bs)
+{
+ KASSERT(LIST_EMPTY(&bs->bs_bplist), ("bstp still active"));
+
+ lck_mtx_lock(bstp_list_mtx);
+ LIST_REMOVE(bs, bs_list);
+ lck_mtx_unlock(bstp_list_mtx);
+ bsd_untimeout(bstp_tick, bs);
+ BSTP_LOCK_DESTROY(bs);
+}
+
+void
+bstp_init(struct bstp_state *bs)
+{
+ struct timespec ts;
+
+ ts.tv_sec = 1;
+ ts.tv_nsec = 0;
+
+ BSTP_LOCK(bs);
+ bsd_timeout(bstp_tick, bs, &ts);
+ bs->bs_running = 1;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+}
+
+void
+bstp_stop(struct bstp_state *bs)
+{
+ struct bstp_port *bp;
+
+ BSTP_LOCK(bs);
+
+ LIST_FOREACH(bp, &bs->bs_bplist, bp_next)
+ bstp_set_port_state(bp, BSTP_IFSTATE_DISCARDING);
+
+ bs->bs_running = 0;
+ bsd_untimeout(bstp_tick, bs);
+ BSTP_UNLOCK(bs);
+}
+
+int
+bstp_create(struct bstp_state *bs, struct bstp_port *bp, struct ifnet *ifp)
+{
+ bzero(bp, sizeof(struct bstp_port));
+
+ BSTP_LOCK(bs);
+ bp->bp_ifp = ifp;
+ bp->bp_bs = bs;
+ bp->bp_priority = BSTP_DEFAULT_PORT_PRIORITY;
+ BSTP_TASK_INIT(&bp->bp_statetask, bstp_notify_state, bp);
+ BSTP_TASK_INIT(&bp->bp_rtagetask, bstp_notify_rtage, bp);
+
+ /* 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);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+int
+bstp_enable(struct bstp_port *bp)
+{
+ struct bstp_state *bs = bp->bp_bs;
+ struct ifnet *ifp = bp->bp_ifp;
+
+ KASSERT(bp->bp_active == 0, ("already a bstp member"));
+
+ switch (ifp->if_type) {
+ case IFT_ETHER: /* These can do spanning tree. */
+ break;
+ default:
+ /* Nothing else can. */
+ return (EINVAL);
+ }
+
+ BSTP_LOCK(bs);
+ LIST_INSERT_HEAD(&bs->bs_bplist, bp, bp_next);
+ bp->bp_active = 1;
+ bp->bp_flags |= BSTP_PORT_NEWINFO;
+ bstp_reinit(bs);
+ bstp_update_roles(bs, bp);
+ BSTP_UNLOCK(bs);
+ return (0);
+}
+
+void
+bstp_disable(struct bstp_port *bp)
+{
+ struct bstp_state *bs = bp->bp_bs;
+
+ KASSERT(bp->bp_active == 1, ("not a bstp member"));
+
+ BSTP_LOCK(bs);
+ bstp_disable_port(bs, bp);
+ LIST_REMOVE(bp, bp_next);
+ bp->bp_active = 0;
+ bstp_reinit(bs);
+ BSTP_UNLOCK(bs);
+}
+
+/*
+ * The bstp_port structure is about to be freed by the parent bridge.
+ */
+void
+bstp_destroy(struct bstp_port *bp)
+{
+ KASSERT(bp->bp_active == 0, ("port is still attached"));
+ bstp_task_drain(&bp->bp_statetask);
+ bstp_task_drain(&bp->bp_rtagetask);
+}
+
+
+__private_extern__ void
+bstp_sys_init(void)
+{
+ lck_grp_attr_t *lck_grp_attr = NULL;
+
+ lck_grp_attr = lck_grp_attr_alloc_init();
+ bstp_lock_grp = lck_grp_alloc_init("bstp", lck_grp_attr);
+ bstp_lock_attr = lck_attr_alloc_init();
+#if BRIDGE_DEBUG
+ lck_attr_setdebug(bstp_lock_attr);
+#endif
+ lck_mtx_init(bstp_list_mtx, bstp_lock_grp, bstp_lock_attr);
+ lck_grp_attr_free(lck_grp_attr);
+
+ LIST_INIT(&bstp_list);
+
+ bstp_create_task_thread();
+}
+
+
+
+static void
+bstp_create_task_thread(void)
+{
+ kern_return_t error;
+
+ lck_grp_attr_t *lck_grp_attr = NULL;
+
+ lck_grp_attr = lck_grp_attr_alloc_init();
+ bstp_task_grp = lck_grp_alloc_init("bstp_task", lck_grp_attr);
+ bstp_task_attr = lck_attr_alloc_init();
+#if BRIDGE_DEBUG
+ lck_attr_setdebug(bstp_task_attr);
+#endif
+ lck_mtx_init(bstp_task_mtx, bstp_lock_grp, bstp_lock_attr);
+ lck_grp_attr_free(lck_grp_attr);
+
+ error = kernel_thread_start((thread_continue_t)bstp_task_thread_func, NULL, &bstp_task_thread);
+}
+
+
+static void
+bstp_task_thread_func(void)
+{
+ struct bstp_task *bt, *tvar;
+
+ lck_mtx_lock(bstp_task_mtx);
+
+ do {
+ while(TAILQ_EMPTY(&bstp_task_queue)) {
+ wakeup(&bstp_task_queue_running);
+ msleep(&bstp_task_queue, bstp_task_mtx, PZERO, "bstp_task_queue", NULL);
+ }
+
+ TAILQ_FOREACH_SAFE(bt, &bstp_task_queue, bt_next, tvar) {
+ int count = bt->bt_count;
+
+ bt->bt_count = 0;
+
+ bstp_task_queue_running = bt;
+ lck_mtx_unlock(bstp_task_mtx);
+
+ (*bt->bt_func)(bt->bt_context, count);
+
+ lck_mtx_lock(bstp_task_mtx);
+ bstp_task_queue_running = NULL;
+
+ if (bt->bt_count == 0)
+ TAILQ_REMOVE(&bstp_task_queue, bt, bt_next);
+ }
+ } while (1);
+
+ /* UNREACHED */
+}
+
+static void
+bstp_task_enqueue(struct bstp_task *bt)
+{
+ lck_mtx_lock(bstp_task_mtx);
+
+ if (bt->bt_count) {
+ bt->bt_count++;
+ lck_mtx_unlock(bstp_task_mtx);
+ wakeup(&bstp_task_queue);
+ return;
+ }
+
+ bt->bt_count = 1;
+ TAILQ_INSERT_TAIL(&bstp_task_queue, bt, bt_next);
+
+ lck_mtx_unlock(bstp_task_mtx);
+
+ wakeup(&bstp_task_queue);
+}
+
+static void
+bstp_task_drain(struct bstp_task *bt)
+{
+ lck_mtx_lock(bstp_task_mtx);
+
+ while (bt->bt_count != 0 || bstp_task_queue_running == bt) {
+ wakeup(&bstp_task_queue);
+ msleep(&bstp_task_queue_running, bstp_task_mtx, PZERO, "bstp_task_queue", NULL);
+ }
+ lck_mtx_unlock(bstp_task_mtx);
+}
+
+
projects / apple / xnu.git / blobdiff