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NetBSD/sys/net/if_bridge.c

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/* $NetBSD: if_bridge.c,v 1.8 2002/08/24 19:00:31 martin Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp
*/
/*
* Network interface bridge support.
*
* TODO:
*
* - Currently only supports Ethernet-like interfaces (Ethernet,
* 802.11, VLANs on Ethernet, etc.) Figure out a nice way
* to bridge other types of interfaces (FDDI-FDDI, and maybe
* consider heterogenous bridges).
*
* - Add packet filter hooks.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_bridge.c,v 1.8 2002/08/24 19:00:31 martin Exp $");
#include "bpfilter.h"
#include "rnd.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/pool.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#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>
/*
* Size of the route hash table. Must be a power of two.
*/
#ifndef BRIDGE_RTHASH_SIZE
#define BRIDGE_RTHASH_SIZE 1024
#endif
#define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
/*
* Maximum number of addresses to cache.
*/
#ifndef BRIDGE_RTABLE_MAX
#define BRIDGE_RTABLE_MAX 100
#endif
/*
* 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_BRIDGE_PRIORITY 0x8000
#define BSTP_DEFAULT_PORT_PRIORITY 0x80
#define BSTP_DEFAULT_PATH_COST 55
/*
* Timeout (in seconds) for entries learned dynamically.
*/
#ifndef BRIDGE_RTABLE_TIMEOUT
#define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
#endif
/*
* Number of seconds between walks of the route list.
*/
#ifndef BRIDGE_RTABLE_PRUNE_PERIOD
#define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
#endif
int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
struct pool bridge_rtnode_pool;
void bridgeattach(int);
int bridge_clone_create(struct if_clone *, int);
void bridge_clone_destroy(struct ifnet *);
int bridge_ioctl(struct ifnet *, u_long, caddr_t);
int bridge_init(struct ifnet *);
void bridge_stop(struct ifnet *, int);
void bridge_start(struct ifnet *);
void bridge_forward(struct bridge_softc *, struct mbuf *m);
void bridge_timer(void *);
void bridge_broadcast(struct bridge_softc *, struct ifnet *, struct mbuf *);
int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
struct ifnet *, int, uint8_t);
struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
void bridge_rttrim(struct bridge_softc *);
void bridge_rtage(struct bridge_softc *);
void bridge_rtflush(struct bridge_softc *, int);
int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp);
int bridge_rtable_init(struct bridge_softc *);
void bridge_rtable_fini(struct bridge_softc *);
struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
const uint8_t *);
int bridge_rtnode_insert(struct bridge_softc *, struct bridge_rtnode *);
void bridge_rtnode_destroy(struct bridge_softc *, struct bridge_rtnode *);
struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
const char *name);
struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
struct ifnet *ifp);
void bridge_delete_member(struct bridge_softc *, struct bridge_iflist *);
int bridge_ioctl_add(struct bridge_softc *, void *);
int bridge_ioctl_del(struct bridge_softc *, void *);
int bridge_ioctl_gifflags(struct bridge_softc *, void *);
int bridge_ioctl_sifflags(struct bridge_softc *, void *);
int bridge_ioctl_scache(struct bridge_softc *, void *);
int bridge_ioctl_gcache(struct bridge_softc *, void *);
int bridge_ioctl_gifs(struct bridge_softc *, void *);
int bridge_ioctl_rts(struct bridge_softc *, void *);
int bridge_ioctl_saddr(struct bridge_softc *, void *);
int bridge_ioctl_sto(struct bridge_softc *, void *);
int bridge_ioctl_gto(struct bridge_softc *, void *);
int bridge_ioctl_daddr(struct bridge_softc *, void *);
int bridge_ioctl_flush(struct bridge_softc *, void *);
int bridge_ioctl_gpri(struct bridge_softc *, void *);
int bridge_ioctl_spri(struct bridge_softc *, void *);
int bridge_ioctl_ght(struct bridge_softc *, void *);
int bridge_ioctl_sht(struct bridge_softc *, void *);
int bridge_ioctl_gfd(struct bridge_softc *, void *);
int bridge_ioctl_sfd(struct bridge_softc *, void *);
int bridge_ioctl_gma(struct bridge_softc *, void *);
int bridge_ioctl_sma(struct bridge_softc *, void *);
int bridge_ioctl_sifprio(struct bridge_softc *, void *);
struct bridge_control {
int (*bc_func)(struct bridge_softc *, void *);
int bc_argsize;
int bc_flags;
};
#define BC_F_COPYIN 0x01 /* copy arguments in */
#define BC_F_COPYOUT 0x02 /* copy arguments out */
#define BC_F_SUSER 0x04 /* do super-user check */
const struct bridge_control bridge_control_table[] = {
{ bridge_ioctl_add, sizeof(struct ifbreq),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_del, sizeof(struct ifbreq),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_gifflags, sizeof(struct ifbreq),
BC_F_COPYIN|BC_F_COPYOUT },
{ bridge_ioctl_sifflags, sizeof(struct ifbreq),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_scache, sizeof(struct ifbrparam),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_gcache, sizeof(struct ifbrparam),
BC_F_COPYOUT },
{ bridge_ioctl_gifs, sizeof(struct ifbifconf),
BC_F_COPYIN|BC_F_COPYOUT },
{ bridge_ioctl_rts, sizeof(struct ifbaconf),
BC_F_COPYIN|BC_F_COPYOUT },
{ bridge_ioctl_saddr, sizeof(struct ifbareq),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_sto, sizeof(struct ifbrparam),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_gto, sizeof(struct ifbrparam),
BC_F_COPYOUT },
{ bridge_ioctl_daddr, sizeof(struct ifbareq),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_flush, sizeof(struct ifbreq),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_gpri, sizeof(struct ifbrparam),
BC_F_COPYOUT },
{ bridge_ioctl_spri, sizeof(struct ifbrparam),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_ght, sizeof(struct ifbrparam),
BC_F_COPYOUT },
{ bridge_ioctl_sht, sizeof(struct ifbrparam),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_gfd, sizeof(struct ifbrparam),
BC_F_COPYOUT },
{ bridge_ioctl_sfd, sizeof(struct ifbrparam),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_gma, sizeof(struct ifbrparam),
BC_F_COPYOUT },
{ bridge_ioctl_sma, sizeof(struct ifbrparam),
BC_F_COPYIN|BC_F_SUSER },
{ bridge_ioctl_sifprio, sizeof(struct ifbreq),
BC_F_COPYIN|BC_F_SUSER },
};
const int bridge_control_table_size =
sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
LIST_HEAD(, bridge_softc) bridge_list;
struct if_clone bridge_cloner =
IF_CLONE_INITIALIZER("bridge", bridge_clone_create, bridge_clone_destroy);
/*
* bridgeattach:
*
* Pseudo-device attach routine.
*/
void
bridgeattach(int n)
{
pool_init(&bridge_rtnode_pool, sizeof(struct bridge_rtnode),
0, 0, 0, "brtpl", NULL);
LIST_INIT(&bridge_list);
if_clone_attach(&bridge_cloner);
}
/*
* bridge_clone_create:
*
* Create a new bridge instance.
*/
int
bridge_clone_create(struct if_clone *ifc, int unit)
{
struct bridge_softc *sc;
struct ifnet *ifp;
int s;
sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK);
memset(sc, 0, sizeof(*sc));
ifp = &sc->sc_if;
sc->sc_brtmax = BRIDGE_RTABLE_MAX;
sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
/* Initialize our routing table. */
bridge_rtable_init(sc);
callout_init(&sc->sc_brcallout);
callout_init(&sc->sc_bstpcallout);
LIST_INIT(&sc->sc_iflist);
sprintf(ifp->if_xname, "%s%d", ifc->ifc_name, unit);
ifp->if_softc = sc;
ifp->if_mtu = ETHERMTU;
ifp->if_ioctl = bridge_ioctl;
ifp->if_output = bridge_output;
ifp->if_start = bridge_start;
ifp->if_stop = bridge_stop;
ifp->if_init = bridge_init;
ifp->if_type = IFT_BRIDGE;
ifp->if_addrlen = 0;
ifp->if_dlt = DLT_EN10MB;
ifp->if_hdrlen = ETHER_HDR_LEN;
if_attach(ifp);
if_alloc_sadl(ifp);
s = splnet();
LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
splx(s);
return (0);
}
/*
* bridge_clone_destroy:
*
* Destroy a bridge instance.
*/
void
bridge_clone_destroy(struct ifnet *ifp)
{
struct bridge_softc *sc = ifp->if_softc;
struct bridge_iflist *bif;
int s;
s = splnet();
bridge_stop(ifp, 1);
while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
bridge_delete_member(sc, bif);
LIST_REMOVE(sc, sc_list);
splx(s);
if_detach(ifp);
/* Tear down the routing table. */
bridge_rtable_fini(sc);
free(sc, M_DEVBUF);
}
/*
* bridge_ioctl:
*
* Handle a control request from the operator.
*/
int
bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct bridge_softc *sc = ifp->if_softc;
struct proc *p = curproc; /* XXX */
union {
struct ifbreq ifbreq;
struct ifbifconf ifbifconf;
struct ifbareq ifbareq;
struct ifbaconf ifbaconf;
struct ifbrparam ifbrparam;
} args;
struct ifdrv *ifd = (struct ifdrv *) data;
const struct bridge_control *bc;
int s, error = 0;
s = splnet();
switch (cmd) {
case SIOCGDRVSPEC:
case SIOCSDRVSPEC:
if (ifd->ifd_cmd >= bridge_control_table_size) {
error = EINVAL;
break;
}
bc = &bridge_control_table[ifd->ifd_cmd];
if (cmd == SIOCGDRVSPEC &&
(bc->bc_flags & BC_F_COPYOUT) == 0)
return (EINVAL);
else if (cmd == SIOCSDRVSPEC &&
(bc->bc_flags & BC_F_COPYOUT) != 0)
return (EINVAL);
if (bc->bc_flags & BC_F_SUSER) {
error = suser(p->p_ucred, &p->p_acflag);
if (error)
break;
}
if (ifd->ifd_len != bc->bc_argsize ||
ifd->ifd_len > sizeof(args)) {
error = EINVAL;
break;
}
if (bc->bc_flags & BC_F_COPYIN) {
error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
if (error)
break;
}
error = (*bc->bc_func)(sc, &args);
if (error)
break;
if (bc->bc_flags & BC_F_COPYOUT)
error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) {
/*
* If interface is marked down and it is running,
* then stop and disable it.
*/
(*ifp->if_stop)(ifp, 1);
} else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
error = (*ifp->if_init)(ifp);
}
break;
default:
error = ENOTTY;
break;
}
splx(s);
return (error);
}
/*
* bridge_lookup_member:
*
* Lookup a bridge member interface. Must be called at splnet().
*/
struct bridge_iflist *
bridge_lookup_member(struct bridge_softc *sc, const char *name)
{
struct bridge_iflist *bif;
struct ifnet *ifp;
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
ifp = bif->bif_ifp;
if (strcmp(ifp->if_xname, name) == 0)
return (bif);
}
return (NULL);
}
/*
* bridge_lookup_member_if:
*
* Lookup a bridge member interface by ifnet*. Must be called at splnet().
*/
struct bridge_iflist *
bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
{
struct bridge_iflist *bif;
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
if (bif->bif_ifp == member_ifp)
return (bif);
}
return (NULL);
}
/*
* bridge_delete_member:
*
* Delete the specified member interface.
*/
void
bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif)
{
struct ifnet *ifs = bif->bif_ifp;
switch (ifs->if_type) {
case IFT_ETHER:
/*
* Take the interface out of promiscuous mode.
*/
(void) ifpromisc(ifs, 0);
break;
default:
#ifdef DIAGNOSTIC
panic("bridge_delete_member: impossible");
#endif
break;
}
ifs->if_bridge = NULL;
LIST_REMOVE(bif, bif_next);
bridge_rtdelete(sc, ifs);
free(bif, M_DEVBUF);
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
}
int
bridge_ioctl_add(struct bridge_softc *sc, void *arg)
{
struct ifbreq *req = arg;
struct bridge_iflist *bif = NULL;
struct ifnet *ifs;
int error = 0;
ifs = ifunit(req->ifbr_ifsname);
if (ifs == NULL)
return (ENOENT);
if (sc->sc_if.if_mtu != ifs->if_mtu)
return (EINVAL);
if (ifs->if_bridge == sc)
return (EEXIST);
if (ifs->if_bridge != NULL)
return (EBUSY);
bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT);
if (bif == NULL)
return (ENOMEM);
switch (ifs->if_type) {
case IFT_ETHER:
/*
* Place the interface into promiscuous mode.
*/
error = ifpromisc(ifs, 1);
if (error)
goto out;
break;
default:
error = EINVAL;
goto out;
}
bif->bif_ifp = ifs;
bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
bif->bif_priority = BSTP_DEFAULT_PORT_PRIORITY;
bif->bif_path_cost = BSTP_DEFAULT_PATH_COST;
ifs->if_bridge = sc;
LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
else
bstp_stop(sc);
out:
if (error) {
if (bif != NULL)
free(bif, M_DEVBUF);
}
return (error);
}
int
bridge_ioctl_del(struct bridge_softc *sc, void *arg)
{
struct ifbreq *req = arg;
struct bridge_iflist *bif;
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
if (bif == NULL)
return (ENOENT);
bridge_delete_member(sc, bif);
return (0);
}
int
bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
{
struct ifbreq *req = arg;
struct bridge_iflist *bif;
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
if (bif == NULL)
return (ENOENT);
req->ifbr_ifsflags = bif->bif_flags;
req->ifbr_state = bif->bif_state;
req->ifbr_priority = bif->bif_priority;
req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
return (0);
}
int
bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
{
struct ifbreq *req = arg;
struct bridge_iflist *bif;
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
if (bif == NULL)
return (ENOENT);
if (req->ifbr_ifsflags & IFBIF_STP) {
switch (bif->bif_ifp->if_type) {
case IFT_ETHER:
/* These can do spanning tree. */
break;
default:
/* Nothing else can. */
return (EINVAL);
}
}
bif->bif_flags = req->ifbr_ifsflags;
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
return (0);
}
int
bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
sc->sc_brtmax = param->ifbrp_csize;
bridge_rttrim(sc);
return (0);
}
int
bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
param->ifbrp_csize = sc->sc_brtmax;
return (0);
}
int
bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
{
struct ifbifconf *bifc = arg;
struct bridge_iflist *bif;
struct ifbreq breq;
int count, len, error = 0;
count = 0;
LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
count++;
if (bifc->ifbic_len == 0) {
bifc->ifbic_len = sizeof(breq) * count;
return (0);
}
count = 0;
len = bifc->ifbic_len;
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
if (len < sizeof(breq))
break;
strcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname);
breq.ifbr_ifsflags = bif->bif_flags;
breq.ifbr_state = bif->bif_state;
breq.ifbr_priority = bif->bif_priority;
breq.ifbr_portno = bif->bif_ifp->if_index & 0xff;
error = copyout(&breq, bifc->ifbic_req + count, sizeof(breq));
if (error)
break;
count++;
len -= sizeof(breq);
}
bifc->ifbic_len = sizeof(breq) * count;
return (error);
}
int
bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
{
struct ifbaconf *bac = arg;
struct bridge_rtnode *brt;
struct ifbareq bareq;
int count = 0, error = 0, len;
if (bac->ifbac_len == 0)
return (0);
len = bac->ifbac_len;
LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
if (len < sizeof(bareq))
goto out;
strcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname);
memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
bareq.ifba_expire = brt->brt_expire - mono_time.tv_sec;
else
bareq.ifba_expire = 0;
bareq.ifba_flags = brt->brt_flags;
error = copyout(&bareq, bac->ifbac_req + count, sizeof(bareq));
if (error)
goto out;
count++;
len -= sizeof(bareq);
}
out:
bac->ifbac_len = sizeof(bareq) * count;
return (error);
}
int
bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
{
struct ifbareq *req = arg;
struct bridge_iflist *bif;
int error;
bif = bridge_lookup_member(sc, req->ifba_ifsname);
if (bif == NULL)
return (ENOENT);
error = bridge_rtupdate(sc, req->ifba_dst, bif->bif_ifp, 1,
req->ifba_flags);
return (error);
}
int
bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
sc->sc_brttimeout = param->ifbrp_ctime;
return (0);
}
int
bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
param->ifbrp_ctime = sc->sc_brttimeout;
return (0);
}
int
bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
{
struct ifbareq *req = arg;
return (bridge_rtdaddr(sc, req->ifba_dst));
}
int
bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
{
struct ifbreq *req = arg;
bridge_rtflush(sc, req->ifbr_ifsflags);
return (0);
}
int
bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
param->ifbrp_prio = sc->sc_bridge_priority;
return (0);
}
int
bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
sc->sc_bridge_priority = param->ifbrp_prio;
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
return (0);
}
int
bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
return (0);
}
int
bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
if (param->ifbrp_hellotime == 0)
return (EINVAL);
sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
return (0);
}
int
bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
return (0);
}
int
bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
if (param->ifbrp_fwddelay == 0)
return (EINVAL);
sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
return (0);
}
int
bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
return (0);
}
int
bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
{
struct ifbrparam *param = arg;
if (param->ifbrp_maxage == 0)
return (EINVAL);
sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
return (0);
}
int
bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
{
struct ifbreq *req = arg;
struct bridge_iflist *bif;
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
if (bif == NULL)
return (ENOENT);
bif->bif_priority = req->ifbr_priority;
if (sc->sc_if.if_flags & IFF_RUNNING)
bstp_initialization(sc);
return (0);
}
/*
* bridge_ifdetach:
*
* Detach an interface from a bridge. Called when a member
* interface is detaching.
*/
void
bridge_ifdetach(struct ifnet *ifp)
{
struct bridge_softc *sc = ifp->if_bridge;
struct ifbreq breq;
memset(&breq, 0, sizeof(breq));
sprintf(breq.ifbr_ifsname, ifp->if_xname);
(void) bridge_ioctl_del(sc, &breq);
}
/*
* bridge_init:
*
* Initialize a bridge interface.
*/
int
bridge_init(struct ifnet *ifp)
{
struct bridge_softc *sc = ifp->if_softc;
if (ifp->if_flags & IFF_RUNNING)
return (0);
callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
bridge_timer, sc);
ifp->if_flags |= IFF_RUNNING;
return (0);
}
/*
* bridge_stop:
*
* Stop the bridge interface.
*/
void
bridge_stop(struct ifnet *ifp, int disable)
{
struct bridge_softc *sc = ifp->if_softc;
if ((ifp->if_flags & IFF_RUNNING) == 0)
return;
callout_stop(&sc->sc_brcallout);
bstp_stop(sc);
IF_PURGE(&ifp->if_snd);
bridge_rtflush(sc, IFBF_FLUSHDYN);
ifp->if_flags &= ~IFF_RUNNING;
}
/*
* bridge_enqueue:
*
* Enqueue a packet on a bridge member interface.
*
* NOTE: must be called at splnet().
*/
__inline void
bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
{
ALTQ_DECL(struct altq_pktattr pktattr;)
int len, error;
short mflags;
#ifdef ALTQ
/*
* If ALTQ is enabled on the member interface, do
* classification; the queueing discipline might
* not require classification, but might require
* the address family/header pointer in the pktattr.
*/
if (ALTQ_IS_ENABLED(&dst_ifp->if_snd)) {
/* XXX IFT_ETHER */
altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
}
#endif /* ALTQ */
len = m->m_pkthdr.len;
mflags = m->m_flags;
IFQ_ENQUEUE(&dst_ifp->if_snd, m, &pktattr, error);
if (error) {
/* mbuf is already freed */
sc->sc_if.if_oerrors++;
return;
}
sc->sc_if.if_opackets++;
sc->sc_if.if_obytes += len;
dst_ifp->if_obytes += len;
if (mflags & M_MCAST) {
sc->sc_if.if_omcasts++;
dst_ifp->if_omcasts++;
}
if ((dst_ifp->if_flags & IFF_OACTIVE) == 0)
(*dst_ifp->if_start)(dst_ifp);
}
/*
* bridge_output:
*
* Send output from a bridge member interface. This
* performs the bridging function for locally originated
* packets.
*
* The mbuf has the Ethernet header already attached. We must
* enqueue or free the mbuf before returning.
*/
int
bridge_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *sa,
struct rtentry *rt)
{
struct ether_header *eh;
struct ifnet *dst_if;
struct bridge_softc *sc;
int s;
if (m->m_len < ETHER_HDR_LEN) {
m = m_pullup(m, ETHER_HDR_LEN);
if (m == NULL)
return (0);
}
eh = mtod(m, struct ether_header *);
sc = ifp->if_bridge;
s = splnet();
/*
* If bridge is down, but the original output interface is up,
* go ahead and send out that interface. Otherwise, the packet
* is dropped below.
*/
if ((sc->sc_if.if_flags & IFF_RUNNING) == 0) {
dst_if = ifp;
goto sendunicast;
}
/*
* If the packet is a multicast, or we don't know a better way to
* get there, send to all interfaces.
*/
if (ETHER_IS_MULTICAST(eh->ether_dhost))
dst_if = NULL;
else
dst_if = bridge_rtlookup(sc, eh->ether_dhost);
if (dst_if == NULL) {
struct bridge_iflist *bif;
struct mbuf *mc;
int used = 0;
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
dst_if = bif->bif_ifp;
if ((dst_if->if_flags & IFF_RUNNING) == 0)
continue;
/*
* If this is not the original output interface,
* and the interface is participating in spanning
* tree, make sure the port is in a state that
* allows forwarding.
*/
if (dst_if != ifp &&
(bif->bif_flags & IFBIF_STP) != 0) {
switch (bif->bif_state) {
case BSTP_IFSTATE_BLOCKING:
case BSTP_IFSTATE_LISTENING:
case BSTP_IFSTATE_DISABLED:
continue;
}
}
if (LIST_NEXT(bif, bif_next) == NULL) {
used = 1;
mc = m;
} else {
mc = m_copym(m, 0, M_COPYALL, M_NOWAIT);
if (mc == NULL) {
sc->sc_if.if_oerrors++;
continue;
}
}
bridge_enqueue(sc, dst_if, mc);
}
if (used == 0)
m_freem(m);
splx(s);
return (0);
}
sendunicast:
/*
* XXX Spanning tree consideration here?
*/
if ((dst_if->if_flags & IFF_RUNNING) == 0) {
m_freem(m);
splx(s);
return (0);
}
bridge_enqueue(sc, dst_if, m);
splx(s);
return (0);
}
/*
* bridge_start:
*
* Start output on a bridge.
*
* NOTE: This routine should never be called in this implementation.
*/
void
bridge_start(struct ifnet *ifp)
{
printf("%s: bridge_start() called\n", ifp->if_xname);
}
/*
* bridge_forward:
*
* The fowarding function of the bridge.
*/
void
bridge_forward(struct bridge_softc *sc, struct mbuf *m)
{
struct bridge_iflist *bif;
struct ifnet *src_if, *dst_if;
struct ether_header *eh;
src_if = m->m_pkthdr.rcvif;
sc->sc_if.if_ipackets++;
sc->sc_if.if_ibytes += m->m_pkthdr.len;
/*
* Look up the bridge_iflist.
*/
bif = bridge_lookup_member_if(sc, src_if);
if (bif == NULL) {
/* Interface is not a bridge member (anymore?) */
m_freem(m);
return;
}
if (bif->bif_flags & IFBIF_STP) {
switch (bif->bif_state) {
case BSTP_IFSTATE_BLOCKING:
case BSTP_IFSTATE_LISTENING:
case BSTP_IFSTATE_DISABLED:
m_freem(m);
return;
}
}
eh = mtod(m, struct ether_header *);
/*
* If the interface is learning, and the source
* address is valid and not multicast, record
* the address.
*/
if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
(eh->ether_shost[0] == 0 &&
eh->ether_shost[1] == 0 &&
eh->ether_shost[2] == 0 &&
eh->ether_shost[3] == 0 &&
eh->ether_shost[4] == 0 &&
eh->ether_shost[5] == 0) == 0) {
(void) bridge_rtupdate(sc, eh->ether_shost,
src_if, 0, IFBAF_DYNAMIC);
}
if ((bif->bif_flags & IFBIF_STP) != 0 &&
bif->bif_state == BSTP_IFSTATE_LEARNING) {
m_freem(m);
return;
}
/*
* At this point, the port either doesn't participate
* in spanning tree or it is in the forwarding state.
*/
/*
* If the packet is unicast, destined for someone on
* "this" side of the bridge, drop it.
*/
if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
dst_if = bridge_rtlookup(sc, eh->ether_dhost);
if (src_if == dst_if) {
m_freem(m);
return;
}
} else {
/* ...forward it to all interfaces. */
sc->sc_if.if_imcasts++;
dst_if = NULL;
}
if (dst_if == NULL) {
bridge_broadcast(sc, src_if, m);
return;
}
/*
* At this point, we're dealing with a unicast frame
* going to a different interface.
*/
if ((dst_if->if_flags & IFF_RUNNING) == 0) {
m_freem(m);
return;
}
bif = bridge_lookup_member_if(sc, dst_if);
if (bif == NULL) {
/* Not a member of the bridge (anymore?) */
m_freem(m);
return;
}
if (bif->bif_flags & IFBIF_STP) {
switch (bif->bif_state) {
case BSTP_IFSTATE_DISABLED:
case BSTP_IFSTATE_BLOCKING:
m_freem(m);
return;
}
}
bridge_enqueue(sc, dst_if, m);
}
/*
* bridge_input:
*
* Receive input from a member interface. Queue the packet for
* bridging if it is not for us.
*/
struct mbuf *
bridge_input(struct ifnet *ifp, struct mbuf *m)
{
struct bridge_softc *sc = ifp->if_bridge;
struct bridge_iflist *bif;
struct ether_header *eh;
struct mbuf *mc;
if ((sc->sc_if.if_flags & IFF_RUNNING) == 0)
return (m);
bif = bridge_lookup_member_if(sc, ifp);
if (bif == NULL)
return (m);
eh = mtod(m, struct ether_header *);
if (m->m_flags & (M_BCAST|M_MCAST)) {
/* Tap off 802.1D packets; they do not get forwarded. */
if (memcmp(eh->ether_dhost, bstp_etheraddr,
ETHER_ADDR_LEN) == 0) {
m = bstp_input(ifp, m);
if (m == NULL)
return (NULL);
}
if (bif->bif_flags & IFBIF_STP) {
switch (bif->bif_state) {
case BSTP_IFSTATE_BLOCKING:
case BSTP_IFSTATE_LISTENING:
case BSTP_IFSTATE_DISABLED:
return (m);
}
}
/*
* Make a deep copy of the packet and enqueue the copy
* for bridge processing; return the original packet for
* local processing.
*/
mc = m_dup(m, 0, M_COPYALL, M_NOWAIT);
if (mc == NULL)
return (m);
/* Perform the bridge forwarding function with the copy. */
bridge_forward(sc, mc);
/* Return the original packet for local processing. */
return (m);
}
if (bif->bif_flags & IFBIF_STP) {
switch (bif->bif_state) {
case BSTP_IFSTATE_BLOCKING:
case BSTP_IFSTATE_LISTENING:
case BSTP_IFSTATE_DISABLED:
return (m);
}
}
/*
* Unicast. Make sure it's not for us.
*/
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
/* It is destined for us. */
if (memcmp(LLADDR(bif->bif_ifp->if_sadl), eh->ether_dhost,
ETHER_ADDR_LEN) == 0) {
if (bif->bif_flags & IFBIF_LEARNING)
(void) bridge_rtupdate(sc,
eh->ether_shost, ifp, 0, IFBAF_DYNAMIC);
m->m_pkthdr.rcvif = bif->bif_ifp;
return (m);
}
/* We just received a packet that we sent out. */
if (memcmp(LLADDR(bif->bif_ifp->if_sadl), eh->ether_shost,
ETHER_ADDR_LEN) == 0) {
m_freem(m);
return (NULL);
}
}
/* Perform the bridge forwarding function. */
bridge_forward(sc, m);
return (NULL);
}
/*
* bridge_broadcast:
*
* Send a frame to all interfaces that are members of
* the bridge, except for the one on which the packet
* arrived.
*/
void
bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
struct mbuf *m)
{
struct bridge_iflist *bif;
struct mbuf *mc;
struct ifnet *dst_if;
int used = 0;
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
dst_if = bif->bif_ifp;
if (dst_if == src_if)
continue;
if (bif->bif_flags & IFBIF_STP) {
switch (bif->bif_state) {
case BSTP_IFSTATE_BLOCKING:
case BSTP_IFSTATE_DISABLED:
continue;
}
}
if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
(m->m_flags & (M_BCAST|M_MCAST)) == 0)
continue;
if ((dst_if->if_flags & IFF_RUNNING) == 0)
continue;
if (LIST_NEXT(bif, bif_next) == NULL) {
mc = m;
used = 1;
} else {
mc = m_copym(m, 0, M_COPYALL, M_DONTWAIT);
if (mc == NULL) {
sc->sc_if.if_oerrors++;
continue;
}
}
bridge_enqueue(sc, dst_if, mc);
}
if (used == 0)
m_freem(m);
}
/*
* bridge_rtupdate:
*
* Add a bridge routing entry.
*/
int
bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
struct ifnet *dst_if, int setflags, uint8_t flags)
{
struct bridge_rtnode *brt;
int error;
/*
* A route for this destination might already exist. If so,
* update it, otherwise create a new one.
*/
if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
if (sc->sc_brtcnt >= sc->sc_brtmax)
return (ENOSPC);
/*
* Allocate a new bridge forwarding node, and
* initialize the expiration time and Ethernet
* address.
*/
brt = pool_get(&bridge_rtnode_pool, PR_NOWAIT);
if (brt == NULL)
return (ENOMEM);
memset(brt, 0, sizeof(*brt));
brt->brt_expire = mono_time.tv_sec + sc->sc_brttimeout;
brt->brt_flags = IFBAF_DYNAMIC;
memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
pool_put(&bridge_rtnode_pool, brt);
return (error);
}
}
brt->brt_ifp = dst_if;
if (setflags) {
brt->brt_flags = flags;
brt->brt_expire = (flags & IFBAF_STATIC) ? 0 :
mono_time.tv_sec + sc->sc_brttimeout;
}
return (0);
}
/*
* bridge_rtlookup:
*
* Lookup the destination interface for an address.
*/
struct ifnet *
bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
{
struct bridge_rtnode *brt;
if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
return (NULL);
return (brt->brt_ifp);
}
/*
* bridge_rttrim:
*
* Trim the routine table so that we have a number
* of routing entries less than or equal to the
* maximum number.
*/
void
bridge_rttrim(struct bridge_softc *sc)
{
struct bridge_rtnode *brt, *nbrt;
/* Make sure we actually need to do this. */
if (sc->sc_brtcnt <= sc->sc_brtmax)
return;
/* Force an aging cycle; this might trim enough addresses. */
bridge_rtage(sc);
if (sc->sc_brtcnt <= sc->sc_brtmax)
return;
for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
nbrt = LIST_NEXT(brt, brt_list);
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
bridge_rtnode_destroy(sc, brt);
if (sc->sc_brtcnt <= sc->sc_brtmax)
return;
}
}
}
/*
* bridge_timer:
*
* Aging timer for the bridge.
*/
void
bridge_timer(void *arg)
{
struct bridge_softc *sc = arg;
int s;
s = splnet();
bridge_rtage(sc);
splx(s);
if (sc->sc_if.if_flags & IFF_RUNNING)
callout_reset(&sc->sc_brcallout,
bridge_rtable_prune_period * hz, bridge_timer, sc);
}
/*
* bridge_rtage:
*
* Perform an aging cycle.
*/
void
bridge_rtage(struct bridge_softc *sc)
{
struct bridge_rtnode *brt, *nbrt;
for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
nbrt = LIST_NEXT(brt, brt_list);
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
if (mono_time.tv_sec >= brt->brt_expire)
bridge_rtnode_destroy(sc, brt);
}
}
}
/*
* bridge_rtflush:
*
* Remove all dynamic addresses from the bridge.
*/
void
bridge_rtflush(struct bridge_softc *sc, int full)
{
struct bridge_rtnode *brt, *nbrt;
for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
nbrt = LIST_NEXT(brt, brt_list);
if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
bridge_rtnode_destroy(sc, brt);
}
}
/*
* bridge_rtdaddr:
*
* Remove an address from the table.
*/
int
bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
{
struct bridge_rtnode *brt;
if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
return (ENOENT);
bridge_rtnode_destroy(sc, brt);
return (0);
}
/*
* bridge_rtdelete:
*
* Delete routes to a speicifc member interface.
*/
void
bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp)
{
struct bridge_rtnode *brt, *nbrt;
for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
nbrt = LIST_NEXT(brt, brt_list);
if (brt->brt_ifp == ifp)
bridge_rtnode_destroy(sc, brt);
}
}
/*
* bridge_rtable_init:
*
* Initialize the route table for this bridge.
*/
int
bridge_rtable_init(struct bridge_softc *sc)
{
int i;
sc->sc_rthash = malloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
M_DEVBUF, M_NOWAIT);
if (sc->sc_rthash == NULL)
return (ENOMEM);
for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
LIST_INIT(&sc->sc_rthash[i]);
#if NRND > 0
rnd_extract_data(&sc->sc_rthash_key, sizeof(sc->sc_rthash_key),
RND_EXTRACT_ANY);
#else
sc->sc_rthash_key = random();
#endif /* NRND > 0 */
LIST_INIT(&sc->sc_rtlist);
return (0);
}
/*
* bridge_rtable_fini:
*
* Deconstruct the route table for this bridge.
*/
void
bridge_rtable_fini(struct bridge_softc *sc)
{
free(sc->sc_rthash, M_DEVBUF);
}
/*
* The following hash function is adapted from "Hash Functions" by Bob Jenkins
* ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
*/
#define mix(a, b, c) \
do { \
a -= b; a -= c; a ^= (c >> 13); \
b -= c; b -= a; b ^= (a << 8); \
c -= a; c -= b; c ^= (b >> 13); \
a -= b; a -= c; a ^= (c >> 12); \
b -= c; b -= a; b ^= (a << 16); \
c -= a; c -= b; c ^= (b >> 5); \
a -= b; a -= c; a ^= (c >> 3); \
b -= c; b -= a; b ^= (a << 10); \
c -= a; c -= b; c ^= (b >> 15); \
} while (/*CONSTCOND*/0)
static __inline uint32_t
bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
{
uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
b += addr[5] << 8;
b += addr[4];
a += addr[3] << 24;
a += addr[2] << 16;
a += addr[1] << 8;
a += addr[0];
mix(a, b, c);
return (c & BRIDGE_RTHASH_MASK);
}
#undef mix
/*
* bridge_rtnode_lookup:
*
* Look up a bridge route node for the specified destination.
*/
struct bridge_rtnode *
bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
{
struct bridge_rtnode *brt;
uint32_t hash;
int dir;
hash = bridge_rthash(sc, addr);
LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
dir = memcmp(addr, brt->brt_addr, ETHER_ADDR_LEN);
if (dir == 0)
return (brt);
if (dir > 0)
return (NULL);
}
return (NULL);
}
/*
* bridge_rtnode_insert:
*
* Insert the specified bridge node into the route table. We
* assume the entry is not already in the table.
*/
int
bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
{
struct bridge_rtnode *lbrt;
uint32_t hash;
int dir;
hash = bridge_rthash(sc, brt->brt_addr);
lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
if (lbrt == NULL) {
LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
goto out;
}
do {
dir = memcmp(brt->brt_addr, lbrt->brt_addr, ETHER_ADDR_LEN);
if (dir == 0)
return (EEXIST);
if (dir > 0) {
LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
goto out;
}
if (LIST_NEXT(lbrt, brt_hash) == NULL) {
LIST_INSERT_AFTER(lbrt, brt, brt_hash);
goto out;
}
lbrt = LIST_NEXT(lbrt, brt_hash);
} while (lbrt != NULL);
#ifdef DIAGNOSTIC
panic("bridge_rtnode_insert: impossible");
#endif
out:
LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
sc->sc_brtcnt++;
return (0);
}
/*
* bridge_rtnode_destroy:
*
* Destroy a bridge rtnode.
*/
void
bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
{
LIST_REMOVE(brt, brt_hash);
LIST_REMOVE(brt, brt_list);
sc->sc_brtcnt--;
pool_put(&bridge_rtnode_pool, brt);
}
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