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39bb2fca46
bridge but the interface can still be changed afterwards. This falls under the 'dont do that' category but log an warning when INVARIANTS is defined. Approved by: mlaier (mentor) MFC after: 3 days
2642 lines
58 KiB
C
2642 lines
58 KiB
C
/* $NetBSD: if_bridge.c,v 1.31 2005/06/01 19:45:34 jdc Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jason L. Wright
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp
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*/
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/*
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* Network interface bridge support.
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*
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* TODO:
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*
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* - Currently only supports Ethernet-like interfaces (Ethernet,
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* 802.11, VLANs on Ethernet, etc.) Figure out a nice way
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* to bridge other types of interfaces (FDDI-FDDI, and maybe
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* consider heterogenous bridges).
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/protosw.h>
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#include <sys/systm.h>
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#include <sys/time.h>
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#include <sys/socket.h> /* for net/if.h */
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#include <sys/sockio.h>
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#include <sys/ctype.h> /* string functions */
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#include <sys/kernel.h>
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#include <sys/random.h>
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#include <sys/sysctl.h>
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#include <vm/uma.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/condvar.h>
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#include <net/bpf.h>
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#include <net/if.h>
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#include <net/if_clone.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/if_var.h>
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#include <net/pfil.h>
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#include <netinet/in.h> /* for struct arpcom */
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#ifdef INET6
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#endif
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#include <machine/in_cksum.h>
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#include <netinet/if_ether.h> /* for struct arpcom */
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#include <net/if_bridgevar.h>
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#include <net/if_llc.h>
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#include <net/route.h>
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#include <netinet/ip_fw.h>
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#include <netinet/ip_dummynet.h>
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/*
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* Size of the route hash table. Must be a power of two.
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*/
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#ifndef BRIDGE_RTHASH_SIZE
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#define BRIDGE_RTHASH_SIZE 1024
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#endif
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#define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
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/*
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* Maximum number of addresses to cache.
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*/
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#ifndef BRIDGE_RTABLE_MAX
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#define BRIDGE_RTABLE_MAX 100
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#endif
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/*
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* Spanning tree defaults.
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*/
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#define BSTP_DEFAULT_MAX_AGE (20 * 256)
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#define BSTP_DEFAULT_HELLO_TIME (2 * 256)
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#define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
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#define BSTP_DEFAULT_HOLD_TIME (1 * 256)
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#define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
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#define BSTP_DEFAULT_PORT_PRIORITY 0x80
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#define BSTP_DEFAULT_PATH_COST 55
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/*
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* Timeout (in seconds) for entries learned dynamically.
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*/
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#ifndef BRIDGE_RTABLE_TIMEOUT
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#define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
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#endif
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/*
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* Number of seconds between walks of the route list.
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*/
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#ifndef BRIDGE_RTABLE_PRUNE_PERIOD
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#define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
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#endif
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static struct mtx bridge_list_mtx;
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extern struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
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extern int (*bridge_output_p)(struct ifnet *, struct mbuf *,
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struct sockaddr *, struct rtentry *);
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extern void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
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int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
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uma_zone_t bridge_rtnode_zone;
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int bridge_clone_create(struct if_clone *, int);
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void bridge_clone_destroy(struct ifnet *);
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int bridge_ioctl(struct ifnet *, u_long, caddr_t);
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static void bridge_init(void *);
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void bridge_stop(struct ifnet *, int);
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void bridge_start(struct ifnet *);
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void bridge_forward(struct bridge_softc *, struct mbuf *m);
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void bridge_timer(void *);
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void bridge_broadcast(struct bridge_softc *, struct ifnet *, struct mbuf *);
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int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
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struct ifnet *, int, uint8_t);
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struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
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void bridge_rttrim(struct bridge_softc *);
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void bridge_rtage(struct bridge_softc *);
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void bridge_rtflush(struct bridge_softc *, int);
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int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
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int bridge_rtable_init(struct bridge_softc *);
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void bridge_rtable_fini(struct bridge_softc *);
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struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
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const uint8_t *);
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int bridge_rtnode_insert(struct bridge_softc *, struct bridge_rtnode *);
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void bridge_rtnode_destroy(struct bridge_softc *, struct bridge_rtnode *);
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struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
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const char *name);
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struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
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struct ifnet *ifp);
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void bridge_delete_member(struct bridge_softc *, struct bridge_iflist *);
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int bridge_ioctl_add(struct bridge_softc *, void *);
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int bridge_ioctl_del(struct bridge_softc *, void *);
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int bridge_ioctl_gifflags(struct bridge_softc *, void *);
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int bridge_ioctl_sifflags(struct bridge_softc *, void *);
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int bridge_ioctl_scache(struct bridge_softc *, void *);
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int bridge_ioctl_gcache(struct bridge_softc *, void *);
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int bridge_ioctl_gifs(struct bridge_softc *, void *);
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int bridge_ioctl_rts(struct bridge_softc *, void *);
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int bridge_ioctl_saddr(struct bridge_softc *, void *);
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int bridge_ioctl_sto(struct bridge_softc *, void *);
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int bridge_ioctl_gto(struct bridge_softc *, void *);
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int bridge_ioctl_daddr(struct bridge_softc *, void *);
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int bridge_ioctl_flush(struct bridge_softc *, void *);
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int bridge_ioctl_gpri(struct bridge_softc *, void *);
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int bridge_ioctl_spri(struct bridge_softc *, void *);
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int bridge_ioctl_ght(struct bridge_softc *, void *);
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int bridge_ioctl_sht(struct bridge_softc *, void *);
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int bridge_ioctl_gfd(struct bridge_softc *, void *);
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int bridge_ioctl_sfd(struct bridge_softc *, void *);
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int bridge_ioctl_gma(struct bridge_softc *, void *);
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int bridge_ioctl_sma(struct bridge_softc *, void *);
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int bridge_ioctl_sifprio(struct bridge_softc *, void *);
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int bridge_ioctl_sifcost(struct bridge_softc *, void *);
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static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *, int);
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static int bridge_ip_checkbasic(struct mbuf **mp);
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# ifdef INET6
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static int bridge_ip6_checkbasic(struct mbuf **mp);
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# endif /* INET6 */
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SYSCTL_DECL(_net_link);
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SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
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static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
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static int pfil_member = 1; /* run pfil hooks on the member interface */
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static int pfil_ipfw = 0; /* layer2 filter with ipfw */
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SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
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&pfil_bridge, 0, "Packet filter on the bridge interface");
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SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
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&pfil_member, 0, "Packet filter on the member interface");
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struct bridge_control {
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int (*bc_func)(struct bridge_softc *, void *);
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int bc_argsize;
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int bc_flags;
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};
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#define BC_F_COPYIN 0x01 /* copy arguments in */
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#define BC_F_COPYOUT 0x02 /* copy arguments out */
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#define BC_F_SUSER 0x04 /* do super-user check */
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const struct bridge_control bridge_control_table[] = {
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{ bridge_ioctl_add, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_del, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_gifflags, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_COPYOUT },
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{ bridge_ioctl_sifflags, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_scache, sizeof(struct ifbrparam),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_gcache, sizeof(struct ifbrparam),
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BC_F_COPYOUT },
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{ bridge_ioctl_gifs, sizeof(struct ifbifconf),
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BC_F_COPYIN|BC_F_COPYOUT },
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{ bridge_ioctl_rts, sizeof(struct ifbaconf),
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BC_F_COPYIN|BC_F_COPYOUT },
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{ bridge_ioctl_saddr, sizeof(struct ifbareq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_sto, sizeof(struct ifbrparam),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_gto, sizeof(struct ifbrparam),
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BC_F_COPYOUT },
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{ bridge_ioctl_daddr, sizeof(struct ifbareq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_flush, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_gpri, sizeof(struct ifbrparam),
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BC_F_COPYOUT },
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{ bridge_ioctl_spri, sizeof(struct ifbrparam),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_ght, sizeof(struct ifbrparam),
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BC_F_COPYOUT },
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{ bridge_ioctl_sht, sizeof(struct ifbrparam),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_gfd, sizeof(struct ifbrparam),
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BC_F_COPYOUT },
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{ bridge_ioctl_sfd, sizeof(struct ifbrparam),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_gma, sizeof(struct ifbrparam),
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BC_F_COPYOUT },
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{ bridge_ioctl_sma, sizeof(struct ifbrparam),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_sifprio, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_SUSER },
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{ bridge_ioctl_sifcost, sizeof(struct ifbreq),
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BC_F_COPYIN|BC_F_SUSER },
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};
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const int bridge_control_table_size =
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sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
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LIST_HEAD(, bridge_softc) bridge_list;
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IFC_SIMPLE_DECLARE(bridge, 0);
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static int
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bridge_modevent(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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mtx_init(&bridge_list_mtx, "if_bridge list", NULL, MTX_DEF);
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if_clone_attach(&bridge_cloner);
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bridge_rtnode_zone = uma_zcreate("bridge_rtnode",
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sizeof(struct bridge_rtnode), NULL, NULL, NULL, NULL,
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UMA_ALIGN_PTR, 0);
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LIST_INIT(&bridge_list);
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bridge_input_p = bridge_input;
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bridge_output_p = bridge_output;
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bridge_dn_p = bridge_dummynet;
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bstp_linkstate_p = bstp_linkstate;
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break;
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case MOD_UNLOAD:
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if_clone_detach(&bridge_cloner);
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while (!LIST_EMPTY(&bridge_list))
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bridge_clone_destroy(LIST_FIRST(&bridge_list)->sc_ifp);
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uma_zdestroy(bridge_rtnode_zone);
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bridge_input_p = NULL;
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bridge_output_p = NULL;
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bridge_dn_p = NULL;
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bstp_linkstate_p = NULL;
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mtx_destroy(&bridge_list_mtx);
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break;
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default:
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return EOPNOTSUPP;
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}
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return 0;
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}
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static moduledata_t bridge_mod = {
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"if_bridge",
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bridge_modevent,
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0
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};
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DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
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/*
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* handler for net.link.bridge.pfil_ipfw
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*/
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static int
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sysctl_pfil_ipfw(SYSCTL_HANDLER_ARGS)
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{
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int enable = pfil_ipfw;
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int error;
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error = sysctl_handle_int(oidp, &enable, 0, req);
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enable = (enable) ? 1 : 0;
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if (enable != pfil_ipfw) {
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pfil_ipfw = enable;
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/*
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* Disable pfil so that ipfw doesnt run twice, if the user really wants
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* both then they can re-enable pfil_bridge and/or pfil_member.
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*/
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if (pfil_ipfw) {
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pfil_bridge = 0;
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pfil_member = 0;
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}
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}
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return error;
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}
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SYSCTL_PROC(_net_link_bridge, OID_AUTO, ipfw, CTLTYPE_INT|CTLFLAG_RW,
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&pfil_ipfw, 0, &sysctl_pfil_ipfw, "I", "Layer2 filter with IPFW");
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/*
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* bridge_clone_create:
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*
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* Create a new bridge instance.
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*/
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int
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bridge_clone_create(struct if_clone *ifc, int unit)
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{
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struct bridge_softc *sc;
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struct ifnet *ifp;
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u_char eaddr[6];
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sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
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BRIDGE_LOCK_INIT(sc);
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ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
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if (ifp == NULL) {
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free(sc, M_DEVBUF);
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return (ENOSPC);
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}
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sc->sc_brtmax = BRIDGE_RTABLE_MAX;
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sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
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sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
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sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
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sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
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sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
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sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
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/* Initialize our routing table. */
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bridge_rtable_init(sc);
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callout_init(&sc->sc_brcallout, 0);
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callout_init(&sc->sc_bstpcallout, 0);
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LIST_INIT(&sc->sc_iflist);
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ifp->if_softc = sc;
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if_initname(ifp, ifc->ifc_name, unit);
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ifp->if_mtu = ETHERMTU;
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ifp->if_ioctl = bridge_ioctl;
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ifp->if_output = bridge_output;
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ifp->if_start = bridge_start;
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ifp->if_init = bridge_init;
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|
ifp->if_type = IFT_BRIDGE;
|
|
IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
|
|
ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
|
|
IFQ_SET_READY(&ifp->if_snd);
|
|
ifp->if_hdrlen = ETHER_HDR_LEN;
|
|
|
|
/*
|
|
* Generate a random ethernet address and use the private AC:DE:48
|
|
* OUI code.
|
|
*/
|
|
arc4rand(eaddr, ETHER_ADDR_LEN, 1);
|
|
eaddr[0] = 0xAC;
|
|
eaddr[1] = 0xDE;
|
|
eaddr[2] = 0x48;
|
|
|
|
ether_ifattach(ifp, eaddr);
|
|
/* Now undo some of the damage... */
|
|
ifp->if_baudrate = 0;
|
|
ifp->if_type = IFT_BRIDGE;
|
|
|
|
mtx_lock(&bridge_list_mtx);
|
|
LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
|
|
mtx_unlock(&bridge_list_mtx);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
|
|
bridge_stop(ifp, 1);
|
|
|
|
while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
|
|
bridge_delete_member(sc, bif);
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
mtx_lock(&bridge_list_mtx);
|
|
LIST_REMOVE(sc, sc_list);
|
|
mtx_unlock(&bridge_list_mtx);
|
|
|
|
ether_ifdetach(ifp);
|
|
if_free_type(ifp, IFT_ETHER);
|
|
|
|
/* Tear down the routing table. */
|
|
bridge_rtable_fini(sc);
|
|
|
|
BRIDGE_LOCK_DESTROY(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 thread *td = curthread;
|
|
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 error = 0;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
|
|
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) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
else if (cmd == SIOCSDRVSPEC &&
|
|
(bc->bc_flags & BC_F_COPYOUT) != 0) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (bc->bc_flags & BC_F_SUSER) {
|
|
error = suser(td);
|
|
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.
|
|
*/
|
|
bridge_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.
|
|
*/
|
|
(*ifp->if_init)(sc);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/* Do not allow the MTU to be changed on the bridge */
|
|
error = EINVAL;
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* drop the lock as ether_ioctl() will call bridge_start() and
|
|
* cause the lock to be recursed.
|
|
*/
|
|
BRIDGE_UNLOCK(sc);
|
|
error = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
|
|
if (BRIDGE_LOCKED(sc))
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* bridge_lookup_member:
|
|
*
|
|
* Lookup a bridge member interface.
|
|
*/
|
|
struct bridge_iflist *
|
|
bridge_lookup_member(struct bridge_softc *sc, const char *name)
|
|
{
|
|
struct bridge_iflist *bif;
|
|
struct ifnet *ifp;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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*.
|
|
*/
|
|
struct bridge_iflist *
|
|
bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
|
|
{
|
|
struct bridge_iflist *bif;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
switch (ifs->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_L2VLAN:
|
|
/*
|
|
* 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;
|
|
BRIDGE_XLOCK(sc);
|
|
LIST_REMOVE(bif, bif_next);
|
|
BRIDGE_XDROP(sc);
|
|
|
|
bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
|
|
|
|
free(bif, M_DEVBUF);
|
|
|
|
if (sc->sc_ifp->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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
ifs = ifunit(req->ifbr_ifsname);
|
|
if (ifs == NULL)
|
|
return (ENOENT);
|
|
|
|
/* Allow the first member to define the MTU */
|
|
if (LIST_EMPTY(&sc->sc_iflist))
|
|
sc->sc_ifp->if_mtu = ifs->if_mtu;
|
|
else if (sc->sc_ifp->if_mtu != ifs->if_mtu) {
|
|
if_printf(sc->sc_ifp, "invalid MTU for %s\n", ifs->if_xname);
|
|
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:
|
|
case IFT_L2VLAN:
|
|
/*
|
|
* 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;
|
|
/*
|
|
* XXX: XLOCK HERE!?!
|
|
*
|
|
* NOTE: insert_***HEAD*** should be safe for the traversals.
|
|
*/
|
|
LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
|
|
|
|
if (sc->sc_ifp->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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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_path_cost = bif->bif_path_cost;
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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_ifp->if_flags & IFF_RUNNING)
|
|
bstp_initialization(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
|
|
sizeof(breq.ifbr_ifsname));
|
|
breq.ifbr_ifsflags = bif->bif_flags;
|
|
breq.ifbr_state = bif->bif_state;
|
|
breq.ifbr_priority = bif->bif_priority;
|
|
breq.ifbr_path_cost = bif->bif_path_cost;
|
|
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;
|
|
struct timeval tv;
|
|
int count = 0, error = 0, len;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if (bac->ifbac_len == 0)
|
|
return (0);
|
|
|
|
getmicrotime(&tv);
|
|
|
|
len = bac->ifbac_len;
|
|
LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
|
|
if (len < sizeof(bareq))
|
|
goto out;
|
|
strlcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname,
|
|
sizeof(bareq.ifba_ifsname));
|
|
memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
|
|
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
|
|
tv.tv_sec < brt->brt_expire)
|
|
bareq.ifba_expire = brt->brt_expire - tv.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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
sc->sc_brttimeout = param->ifbrp_ctime;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
param->ifbrp_ctime = sc->sc_brttimeout;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbareq *req = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
return (bridge_rtdaddr(sc, req->ifba_dst));
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
bridge_rtflush(sc, req->ifbr_ifsflags);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
param->ifbrp_prio = sc->sc_bridge_priority;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
sc->sc_bridge_priority = param->ifbrp_prio;
|
|
|
|
if (sc->sc_ifp->if_flags & IFF_RUNNING)
|
|
bstp_initialization(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if (param->ifbrp_hellotime == 0)
|
|
return (EINVAL);
|
|
sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
|
|
|
|
if (sc->sc_ifp->if_flags & IFF_RUNNING)
|
|
bstp_initialization(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if (param->ifbrp_fwddelay == 0)
|
|
return (EINVAL);
|
|
sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
|
|
|
|
if (sc->sc_ifp->if_flags & IFF_RUNNING)
|
|
bstp_initialization(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if (param->ifbrp_maxage == 0)
|
|
return (EINVAL);
|
|
sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
|
|
|
|
if (sc->sc_ifp->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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
bif->bif_priority = req->ifbr_priority;
|
|
|
|
if (sc->sc_ifp->if_flags & IFF_RUNNING)
|
|
bstp_initialization(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
bif->bif_path_cost = req->ifbr_path_cost;
|
|
|
|
if (sc->sc_ifp->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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
memset(&breq, 0, sizeof(breq));
|
|
snprintf(breq.ifbr_ifsname, sizeof(breq.ifbr_ifsname), ifp->if_xname);
|
|
|
|
(void) bridge_ioctl_del(sc, &breq);
|
|
}
|
|
|
|
/*
|
|
* bridge_init:
|
|
*
|
|
* Initialize a bridge interface.
|
|
*/
|
|
static void
|
|
bridge_init(void *xsc)
|
|
{
|
|
struct bridge_softc *sc = (struct bridge_softc *)xsc;
|
|
struct ifnet *ifp = sc->sc_ifp;
|
|
|
|
if (ifp->if_flags & IFF_RUNNING)
|
|
return;
|
|
|
|
callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
|
|
bridge_timer, sc);
|
|
|
|
ifp->if_flags |= IFF_RUNNING;
|
|
bstp_initialization(sc);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
bridge_rtflush(sc, IFBF_FLUSHDYN);
|
|
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
}
|
|
|
|
/*
|
|
* bridge_enqueue:
|
|
*
|
|
* Enqueue a packet on a bridge member interface.
|
|
*
|
|
*/
|
|
__inline void
|
|
bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
|
|
{
|
|
int len, err;
|
|
short mflags;
|
|
|
|
/*
|
|
* Clear any in-bound checksum flags for this packet.
|
|
*/
|
|
m->m_pkthdr.csum_flags = 0;
|
|
|
|
len = m->m_pkthdr.len;
|
|
mflags = m->m_flags;
|
|
|
|
#ifdef INVARIANTS
|
|
if (len > dst_ifp->if_mtu)
|
|
if_printf(sc->sc_ifp,
|
|
"MTU mismatch, frame length %d exceeds %ld on %s\n", len,
|
|
dst_ifp->if_mtu, dst_ifp->if_xname);
|
|
#endif
|
|
|
|
IFQ_ENQUEUE(&dst_ifp->if_snd, m, err);
|
|
if (err == 0) {
|
|
|
|
sc->sc_ifp->if_opackets++;
|
|
sc->sc_ifp->if_obytes += len;
|
|
|
|
dst_ifp->if_obytes += len;
|
|
|
|
if (mflags & M_MCAST) {
|
|
sc->sc_ifp->if_omcasts++;
|
|
dst_ifp->if_omcasts++;
|
|
}
|
|
}
|
|
|
|
if ((dst_ifp->if_flags & IFF_OACTIVE) == 0)
|
|
(*dst_ifp->if_start)(dst_ifp);
|
|
}
|
|
|
|
/*
|
|
* bridge_dummynet:
|
|
*
|
|
* Receive a queued packet from dummynet and pass it on to the output
|
|
* interface.
|
|
*
|
|
* The mbuf has the Ethernet header already attached.
|
|
*/
|
|
void
|
|
bridge_dummynet(struct mbuf *m, struct ifnet *ifp)
|
|
{
|
|
struct bridge_softc *sc;
|
|
|
|
sc = ifp->if_bridge;
|
|
|
|
/*
|
|
* The packet didnt originate from a member interface. This should only
|
|
* ever happen if a member interface is removed while packets are
|
|
* queued for it.
|
|
*/
|
|
if (sc == NULL) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (inet_pfil_hook.ph_busy_count >= 0
|
|
#ifdef INET6
|
|
|| inet6_pfil_hook.ph_busy_count >= 0
|
|
#endif
|
|
) {
|
|
if (bridge_pfil(&m, sc->sc_ifp, ifp, PFIL_OUT) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
bridge_enqueue(sc, ifp, m);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
|
|
/*
|
|
* 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_ifp->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 error = 0, used = 0;
|
|
|
|
BRIDGE_LOCK2REF(sc, error);
|
|
if (error) {
|
|
m_freem(m);
|
|
return (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_DONTWAIT);
|
|
if (mc == NULL) {
|
|
sc->sc_ifp->if_oerrors++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, mc);
|
|
}
|
|
if (used == 0)
|
|
m_freem(m);
|
|
BRIDGE_UNREF(sc);
|
|
return (0);
|
|
}
|
|
|
|
sendunicast:
|
|
/*
|
|
* XXX Spanning tree consideration here?
|
|
*/
|
|
|
|
if ((dst_if->if_flags & IFF_RUNNING) == 0) {
|
|
m_freem(m);
|
|
BRIDGE_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
bridge_enqueue(sc, dst_if, m);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* bridge_start:
|
|
*
|
|
* Start output on a bridge.
|
|
*
|
|
*/
|
|
void
|
|
bridge_start(struct ifnet *ifp)
|
|
{
|
|
struct bridge_softc *sc;
|
|
struct mbuf *m;
|
|
struct ether_header *eh;
|
|
struct ifnet *dst_if;
|
|
|
|
sc = ifp->if_softc;
|
|
|
|
ifp->if_flags |= IFF_OACTIVE;
|
|
for (;;) {
|
|
IFQ_DEQUEUE(&ifp->if_snd, m);
|
|
if (m == 0)
|
|
break;
|
|
BPF_MTAP(ifp, m);
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
dst_if = NULL;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
|
|
dst_if = bridge_rtlookup(sc, eh->ether_dhost);
|
|
}
|
|
|
|
if (dst_if == NULL)
|
|
bridge_broadcast(sc, ifp, m);
|
|
else {
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
if (inet_pfil_hook.ph_busy_count >= 0
|
|
#ifdef INET6
|
|
|| inet6_pfil_hook.ph_busy_count >= 0
|
|
#endif
|
|
) {
|
|
if (bridge_pfil(&m, sc->sc_ifp, dst_if, PFIL_OUT) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, m);
|
|
}
|
|
}
|
|
ifp->if_flags &= ~IFF_OACTIVE;
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* bridge_forward:
|
|
*
|
|
* The forwarding function of the bridge.
|
|
*
|
|
* NOTE: Releases the lock on return.
|
|
*/
|
|
void
|
|
bridge_forward(struct bridge_softc *sc, struct mbuf *m)
|
|
{
|
|
struct bridge_iflist *bif;
|
|
struct ifnet *src_if, *dst_if, *ifp;
|
|
struct ether_header *eh;
|
|
|
|
src_if = m->m_pkthdr.rcvif;
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
ifp = sc->sc_ifp;
|
|
|
|
sc->sc_ifp->if_ipackets++;
|
|
sc->sc_ifp->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?) */
|
|
BRIDGE_UNLOCK(sc);
|
|
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:
|
|
BRIDGE_UNLOCK(sc);
|
|
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);
|
|
BRIDGE_UNLOCK(sc);
|
|
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) {
|
|
BRIDGE_UNLOCK(sc);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
} else {
|
|
/* ...forward it to all interfaces. */
|
|
sc->sc_ifp->if_imcasts++;
|
|
dst_if = NULL;
|
|
}
|
|
|
|
/* run the packet filter */
|
|
if (inet_pfil_hook.ph_busy_count >= 0
|
|
#ifdef INET6
|
|
|| inet6_pfil_hook.ph_busy_count >= 0
|
|
#endif
|
|
) {
|
|
BRIDGE_UNLOCK(sc);
|
|
if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
BRIDGE_LOCK(sc);
|
|
}
|
|
|
|
if (dst_if == NULL) {
|
|
/* tap off packets passing the bridge */
|
|
BPF_MTAP(ifp, m);
|
|
|
|
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) {
|
|
BRIDGE_UNLOCK(sc);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
bif = bridge_lookup_member_if(sc, dst_if);
|
|
if (bif == NULL) {
|
|
/* Not a member of the bridge (anymore?) */
|
|
BRIDGE_UNLOCK(sc);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
if (bif->bif_flags & IFBIF_STP) {
|
|
switch (bif->bif_state) {
|
|
case BSTP_IFSTATE_DISABLED:
|
|
case BSTP_IFSTATE_BLOCKING:
|
|
BRIDGE_UNLOCK(sc);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* tap off packets passing the bridge */
|
|
BPF_MTAP(ifp, m);
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
if (inet_pfil_hook.ph_busy_count >= 0
|
|
#ifdef INET6
|
|
|| inet6_pfil_hook.ph_busy_count >= 0
|
|
#endif
|
|
) {
|
|
if (bridge_pfil(&m, sc->sc_ifp, dst_if, PFIL_OUT) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
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_ifp->if_flags & IFF_RUNNING) == 0)
|
|
return (m);
|
|
|
|
BRIDGE_LOCK(sc);
|
|
bif = bridge_lookup_member_if(sc, ifp);
|
|
if (bif == NULL) {
|
|
BRIDGE_UNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
|
|
if (memcmp(eh->ether_dhost, IFP2ENADDR(sc->sc_ifp),
|
|
ETHER_ADDR_LEN) == 0) {
|
|
/*
|
|
* If the packet is for us, set the packets source as the
|
|
* bridge, and return the packet back to ether_input for
|
|
* local processing.
|
|
*/
|
|
|
|
/* XXX Do we tap the packet for the member interface too?
|
|
* BPF_MTAP(&m->m_pkthdr.rcvif, m);
|
|
*/
|
|
|
|
/* Mark the packet as arriving on the bridge interface */
|
|
m->m_pkthdr.rcvif = sc->sc_ifp;
|
|
BPF_MTAP(sc->sc_ifp, m);
|
|
sc->sc_ifp->if_ipackets++;
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
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) {
|
|
BRIDGE_UNLOCK(sc);
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
if (bif->bif_flags & IFBIF_STP) {
|
|
switch (bif->bif_state) {
|
|
case BSTP_IFSTATE_BLOCKING:
|
|
case BSTP_IFSTATE_LISTENING:
|
|
case BSTP_IFSTATE_DISABLED:
|
|
BRIDGE_UNLOCK(sc);
|
|
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, M_DONTWAIT);
|
|
if (mc == NULL) {
|
|
BRIDGE_UNLOCK(sc);
|
|
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:
|
|
BRIDGE_UNLOCK(sc);
|
|
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(IF_LLADDR(bif->bif_ifp), 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;
|
|
BRIDGE_UNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
/* We just received a packet that we sent out. */
|
|
if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_shost,
|
|
ETHER_ADDR_LEN) == 0) {
|
|
BRIDGE_UNLOCK(sc);
|
|
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.
|
|
*
|
|
* NOTE: Releases the lock on return.
|
|
*/
|
|
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 error = 0, used = 0;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
BRIDGE_LOCK2REF(sc, error);
|
|
if (error) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
/* Filter on the bridge interface before broadcasting */
|
|
if (inet_pfil_hook.ph_busy_count >= 0
|
|
#ifdef INET6
|
|
|| inet6_pfil_hook.ph_busy_count >= 0
|
|
#endif
|
|
) {
|
|
if (bridge_pfil(&m, sc->sc_ifp, NULL, PFIL_OUT) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
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_ifp->if_oerrors++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Filter on the output interface. Pass a NULL bridge interface
|
|
* pointer so we do not redundantly filter on the bridge for
|
|
* each interface we broadcast on.
|
|
*/
|
|
if (inet_pfil_hook.ph_busy_count >= 0
|
|
#ifdef INET6
|
|
|| inet6_pfil_hook.ph_busy_count >= 0
|
|
#endif
|
|
) {
|
|
if (bridge_pfil(&m, NULL, dst_if, PFIL_OUT) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, mc);
|
|
}
|
|
if (used == 0)
|
|
m_freem(m);
|
|
|
|
BRIDGE_UNREF(sc);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
struct timeval tv;
|
|
int error;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
/*
|
|
* A route for this destination might already exist. If so,
|
|
* update it, otherwise create a new one.
|
|
*/
|
|
getmicrotime(&tv);
|
|
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 = uma_zalloc(bridge_rtnode_zone, M_NOWAIT | M_ZERO);
|
|
if (brt == NULL)
|
|
return (ENOMEM);
|
|
|
|
brt->brt_expire = tv.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) {
|
|
uma_zfree(bridge_rtnode_zone, brt);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
brt->brt_ifp = dst_if;
|
|
if (setflags) {
|
|
brt->brt_flags = flags;
|
|
brt->brt_expire = (flags & IFBAF_STATIC) ? 0 :
|
|
tv.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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
/* 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;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
bridge_rtage(sc);
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
if (sc->sc_ifp->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;
|
|
struct timeval tv;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
getmicrotime(&tv);
|
|
|
|
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 (tv.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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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, int full)
|
|
{
|
|
struct bridge_rtnode *brt, *nbrt;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
|
|
nbrt = LIST_NEXT(brt, brt_list);
|
|
if (brt->brt_ifp == ifp && (full ||
|
|
(brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC))
|
|
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]);
|
|
|
|
sc->sc_rthash_key = arc4random();
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
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)
|
|
{
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
LIST_REMOVE(brt, brt_hash);
|
|
|
|
LIST_REMOVE(brt, brt_list);
|
|
sc->sc_brtcnt--;
|
|
uma_zfree(bridge_rtnode_zone, brt);
|
|
}
|
|
|
|
/*
|
|
* Send bridge packets through pfil if they are one of the types pfil can deal
|
|
* with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
|
|
* question.) If *bifp or *ifp are NULL then packet filtering is skipped for
|
|
* that interface.
|
|
*/
|
|
static int bridge_pfil(struct mbuf **mp, struct ifnet *bifp,
|
|
struct ifnet *ifp, int dir)
|
|
{
|
|
int snap, error, i;
|
|
struct ether_header *eh1, eh2;
|
|
struct ip_fw_args args;
|
|
struct ip *ip;
|
|
struct llc llc1;
|
|
u_int16_t ether_type;
|
|
|
|
snap = 0;
|
|
error = -1; /* Default error if not error == 0 */
|
|
|
|
i = min((*mp)->m_pkthdr.len, max_protohdr);
|
|
if ((*mp)->m_len < i) {
|
|
*mp = m_pullup(*mp, i);
|
|
if (*mp == NULL) {
|
|
printf("%s: m_pullup failed\n", __func__);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
eh1 = mtod(*mp, struct ether_header *);
|
|
ether_type = ntohs(eh1->ether_type);
|
|
|
|
/*
|
|
* Check for SNAP/LLC.
|
|
*/
|
|
if (ether_type < ETHERMTU) {
|
|
struct llc *llc2 = (struct llc *)(eh1 + 1);
|
|
|
|
if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
|
|
llc2->llc_dsap == LLC_SNAP_LSAP &&
|
|
llc2->llc_ssap == LLC_SNAP_LSAP &&
|
|
llc2->llc_control == LLC_UI) {
|
|
ether_type = htons(llc2->llc_un.type_snap.ether_type);
|
|
snap = 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we're trying to filter bridge traffic, don't look at anything
|
|
* other than IP and ARP traffic. If the filter doesn't understand
|
|
* IPv6, don't allow IPv6 through the bridge either. This is lame
|
|
* since if we really wanted, say, an AppleTalk filter, we are hosed,
|
|
* but of course we don't have an AppleTalk filter to begin with.
|
|
* (Note that since pfil doesn't understand ARP it will pass *ALL*
|
|
* ARP traffic.)
|
|
*/
|
|
switch (ether_type) {
|
|
case ETHERTYPE_ARP:
|
|
case ETHERTYPE_REVARP:
|
|
return 0; /* Automatically pass */
|
|
case ETHERTYPE_IP:
|
|
# ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
# endif /* INET6 */
|
|
break;
|
|
default:
|
|
/*
|
|
* ipfw allows layer2 protocol filtering using
|
|
* 'mac-type' so we will let the packet past, if
|
|
* ipfw is disabled then drop it.
|
|
*/
|
|
if (!IPFW_LOADED || pfil_ipfw == 0)
|
|
goto bad;
|
|
}
|
|
|
|
/* Strip off the Ethernet header and keep a copy. */
|
|
m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
|
|
m_adj(*mp, ETHER_HDR_LEN);
|
|
|
|
/* Strip off snap header, if present */
|
|
if (snap) {
|
|
m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
|
|
m_adj(*mp, sizeof(struct llc));
|
|
}
|
|
|
|
/*
|
|
* Check the IP header for alignment and errors
|
|
*/
|
|
if (dir == PFIL_IN) {
|
|
switch (ether_type) {
|
|
case ETHERTYPE_IP:
|
|
error = bridge_ip_checkbasic(mp);
|
|
break;
|
|
# ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
error = bridge_ip6_checkbasic(mp);
|
|
break;
|
|
# endif /* INET6 */
|
|
default:
|
|
error = 0;
|
|
}
|
|
if (error)
|
|
goto bad;
|
|
}
|
|
|
|
if (IPFW_LOADED && pfil_ipfw != 0 && dir == PFIL_OUT && ifp != NULL) {
|
|
error = -1;
|
|
args.rule = ip_dn_claim_rule(*mp);
|
|
if (args.rule != NULL && fw_one_pass)
|
|
goto ipfwpass; /* packet already partially processed */
|
|
|
|
args.m = *mp;
|
|
args.oif = ifp;
|
|
args.next_hop = NULL;
|
|
args.eh = &eh2;
|
|
i = ip_fw_chk_ptr(&args);
|
|
*mp = args.m;
|
|
|
|
if (*mp == NULL)
|
|
return error;
|
|
|
|
if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) {
|
|
|
|
/* put the Ethernet header back on */
|
|
M_PREPEND(*mp, ETHER_HDR_LEN, M_DONTWAIT);
|
|
if (*mp == NULL)
|
|
return error;
|
|
bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
|
|
|
|
/*
|
|
* Pass the pkt to dummynet, which consumes it. The
|
|
* packet will return to us via bridge_dummynet().
|
|
*/
|
|
args.oif = ifp;
|
|
ip_dn_io_ptr(*mp, DN_TO_IFB_FWD, &args);
|
|
return error;
|
|
}
|
|
|
|
if (i != IP_FW_PASS) /* drop */
|
|
goto bad;
|
|
}
|
|
|
|
ipfwpass:
|
|
error = 0;
|
|
|
|
/*
|
|
* Run the packet through pfil
|
|
*/
|
|
switch (ether_type)
|
|
{
|
|
case ETHERTYPE_IP :
|
|
/*
|
|
* before calling the firewall, swap fields the same as
|
|
* IP does. here we assume the header is contiguous
|
|
*/
|
|
ip = mtod(*mp, struct ip *);
|
|
|
|
ip->ip_len = ntohs(ip->ip_len);
|
|
ip->ip_off = ntohs(ip->ip_off);
|
|
|
|
/*
|
|
* Run pfil on the member interface and the bridge, both can
|
|
* be skipped by clearing pfil_member or pfil_bridge.
|
|
*
|
|
* Keep the order:
|
|
* in_if -> bridge_if -> out_if
|
|
*/
|
|
if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
|
|
error = pfil_run_hooks(&inet_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (pfil_member && ifp != NULL)
|
|
error = pfil_run_hooks(&inet_pfil_hook, mp, ifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
|
|
error = pfil_run_hooks(&inet_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
|
|
/* Restore ip and the fields ntohs()'d. */
|
|
if (*mp != NULL && error == 0) {
|
|
ip = mtod(*mp, struct ip *);
|
|
ip->ip_len = htons(ip->ip_len);
|
|
ip->ip_off = htons(ip->ip_off);
|
|
}
|
|
|
|
break;
|
|
# ifdef INET6
|
|
case ETHERTYPE_IPV6 :
|
|
if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
|
|
error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (pfil_member && ifp != NULL)
|
|
error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
|
|
error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
break;
|
|
# endif
|
|
default :
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
if (*mp == NULL)
|
|
return error;
|
|
if (error != 0)
|
|
goto bad;
|
|
|
|
error = -1;
|
|
|
|
/*
|
|
* Finally, put everything back the way it was and return
|
|
*/
|
|
if (snap) {
|
|
M_PREPEND(*mp, sizeof(struct llc), M_DONTWAIT);
|
|
if (*mp == NULL)
|
|
return error;
|
|
bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
|
|
}
|
|
|
|
M_PREPEND(*mp, ETHER_HDR_LEN, M_DONTWAIT);
|
|
if (*mp == NULL)
|
|
return error;
|
|
bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
|
|
|
|
return 0;
|
|
|
|
bad:
|
|
m_freem(*mp);
|
|
*mp = NULL;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Perform basic checks on header size since
|
|
* pfil assumes ip_input has already processed
|
|
* it for it. Cut-and-pasted from ip_input.c.
|
|
* Given how simple the IPv6 version is,
|
|
* does the IPv4 version really need to be
|
|
* this complicated?
|
|
*
|
|
* XXX Should we update ipstat here, or not?
|
|
* XXX Right now we update ipstat but not
|
|
* XXX csum_counter.
|
|
*/
|
|
static int
|
|
bridge_ip_checkbasic(struct mbuf **mp)
|
|
{
|
|
struct mbuf *m = *mp;
|
|
struct ip *ip;
|
|
int len, hlen;
|
|
u_short sum;
|
|
|
|
if (*mp == NULL)
|
|
return -1;
|
|
|
|
if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
|
|
if ((m = m_copyup(m, sizeof(struct ip),
|
|
(max_linkhdr + 3) & ~3)) == NULL) {
|
|
/* XXXJRT new stat, please */
|
|
ipstat.ips_toosmall++;
|
|
goto bad;
|
|
}
|
|
} else if (__predict_false(m->m_len < sizeof (struct ip))) {
|
|
if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
|
|
ipstat.ips_toosmall++;
|
|
goto bad;
|
|
}
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
if (ip == NULL) goto bad;
|
|
|
|
if (ip->ip_v != IPVERSION) {
|
|
ipstat.ips_badvers++;
|
|
goto bad;
|
|
}
|
|
hlen = ip->ip_hl << 2;
|
|
if (hlen < sizeof(struct ip)) { /* minimum header length */
|
|
ipstat.ips_badhlen++;
|
|
goto bad;
|
|
}
|
|
if (hlen > m->m_len) {
|
|
if ((m = m_pullup(m, hlen)) == 0) {
|
|
ipstat.ips_badhlen++;
|
|
goto bad;
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
if (ip == NULL) goto bad;
|
|
}
|
|
|
|
if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
|
|
sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
|
|
} else {
|
|
if (hlen == sizeof(struct ip)) {
|
|
sum = in_cksum_hdr(ip);
|
|
} else {
|
|
sum = in_cksum(m, hlen);
|
|
}
|
|
}
|
|
if (sum) {
|
|
ipstat.ips_badsum++;
|
|
goto bad;
|
|
}
|
|
|
|
/* Retrieve the packet length. */
|
|
len = ntohs(ip->ip_len);
|
|
|
|
/*
|
|
* Check for additional length bogosity
|
|
*/
|
|
if (len < hlen) {
|
|
ipstat.ips_badlen++;
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Check that the amount of data in the buffers
|
|
* is as at least much as the IP header would have us expect.
|
|
* Drop packet if shorter than we expect.
|
|
*/
|
|
if (m->m_pkthdr.len < len) {
|
|
ipstat.ips_tooshort++;
|
|
goto bad;
|
|
}
|
|
|
|
/* Checks out, proceed */
|
|
*mp = m;
|
|
return 0;
|
|
|
|
bad:
|
|
*mp = m;
|
|
return -1;
|
|
}
|
|
|
|
# ifdef INET6
|
|
/*
|
|
* Same as above, but for IPv6.
|
|
* Cut-and-pasted from ip6_input.c.
|
|
* XXX Should we update ip6stat, or not?
|
|
*/
|
|
static int
|
|
bridge_ip6_checkbasic(struct mbuf **mp)
|
|
{
|
|
struct mbuf *m = *mp;
|
|
struct ip6_hdr *ip6;
|
|
|
|
/*
|
|
* If the IPv6 header is not aligned, slurp it up into a new
|
|
* mbuf with space for link headers, in the event we forward
|
|
* it. Otherwise, if it is aligned, make sure the entire base
|
|
* IPv6 header is in the first mbuf of the chain.
|
|
*/
|
|
if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
|
|
struct ifnet *inifp = m->m_pkthdr.rcvif;
|
|
if ((m = m_copyup(m, sizeof(struct ip6_hdr),
|
|
(max_linkhdr + 3) & ~3)) == NULL) {
|
|
/* XXXJRT new stat, please */
|
|
ip6stat.ip6s_toosmall++;
|
|
in6_ifstat_inc(inifp, ifs6_in_hdrerr);
|
|
goto bad;
|
|
}
|
|
} else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
|
|
struct ifnet *inifp = m->m_pkthdr.rcvif;
|
|
if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
|
|
ip6stat.ip6s_toosmall++;
|
|
in6_ifstat_inc(inifp, ifs6_in_hdrerr);
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
|
|
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
|
|
ip6stat.ip6s_badvers++;
|
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
|
|
goto bad;
|
|
}
|
|
|
|
/* Checks out, proceed */
|
|
*mp = m;
|
|
return 0;
|
|
|
|
bad:
|
|
*mp = m;
|
|
return -1;
|
|
}
|
|
# endif /* INET6 */
|