489fc2258f
we can only bridge interfaces with the same value it meant that all members had to be set at ETHERMTU as well. Allow the first member to be added to define the MTU for the bridge, the check still applies to all additional members. Print an informative message if the MTU is incorrect [1] Requested by: Niki Denev [1] Approved by: mlaier (mentor) MFC after: 3 days
2633 lines
57 KiB
C
2633 lines
57 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
|
|
* 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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|
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DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
|
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|
|
/*
|
|
* handler for net.link.bridge.pfil_ipfw
|
|
*/
|
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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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|
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error = sysctl_handle_int(oidp, &enable, 0, req);
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enable = (enable) ? 1 : 0;
|
|
|
|
if (enable != pfil_ipfw) {
|
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pfil_ipfw = enable;
|
|
|
|
/*
|
|
* Disable pfil so that ipfw doesnt run twice, if the user really wants
|
|
* both then they can re-enable pfil_bridge and/or pfil_member.
|
|
*/
|
|
if (pfil_ipfw) {
|
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pfil_bridge = 0;
|
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pfil_member = 0;
|
|
}
|
|
}
|
|
|
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return error;
|
|
}
|
|
SYSCTL_PROC(_net_link_bridge, OID_AUTO, ipfw, CTLTYPE_INT|CTLFLAG_RW,
|
|
&pfil_ipfw, 0, &sysctl_pfil_ipfw, "I", "Layer2 filter with IPFW");
|
|
|
|
/*
|
|
* 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;
|
|
u_char eaddr[6];
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|
|
sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
|
|
BRIDGE_LOCK_INIT(sc);
|
|
ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
|
|
if (ifp == NULL) {
|
|
free(sc, M_DEVBUF);
|
|
return (ENOSPC);
|
|
}
|
|
|
|
sc->sc_brtmax = BRIDGE_RTABLE_MAX;
|
|
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;
|
|
sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
|
|
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);
|
|
|
|
ifp->if_softc = sc;
|
|
if_initname(ifp, ifc->ifc_name, unit);
|
|
ifp->if_mtu = ETHERMTU;
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|
ifp->if_ioctl = bridge_ioctl;
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|
ifp->if_output = bridge_output;
|
|
ifp->if_start = bridge_start;
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|
ifp->if_init = bridge_init;
|
|
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:
|
|
/*
|
|
* 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;
|
|
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 */
|