3563 lines
86 KiB
C
3563 lines
86 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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*
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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/eventhandler.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/jail.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/syslog.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/priv.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 <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 <net/vnet.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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#include <netinet6/in6_ifattach.h>
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#endif
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#if defined(INET) || defined(INET6)
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#include <netinet/ip_carp.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/bridgestp.h>
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#include <net/if_bridgevar.h>
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#include <net/if_llc.h>
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#include <net/if_vlan_var.h>
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#include <net/route.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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* Default 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 2000
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#endif
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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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/*
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* List of capabilities to possibly mask on the member interface.
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*/
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#define BRIDGE_IFCAPS_MASK (IFCAP_TOE|IFCAP_TSO|IFCAP_TXCSUM)
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/*
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* List of capabilities to strip
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*/
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#define BRIDGE_IFCAPS_STRIP IFCAP_LRO
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/*
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* Bridge interface list entry.
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*/
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struct bridge_iflist {
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LIST_ENTRY(bridge_iflist) bif_next;
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struct ifnet *bif_ifp; /* member if */
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struct bstp_port bif_stp; /* STP state */
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uint32_t bif_flags; /* member if flags */
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int bif_savedcaps; /* saved capabilities */
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uint32_t bif_addrmax; /* max # of addresses */
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uint32_t bif_addrcnt; /* cur. # of addresses */
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uint32_t bif_addrexceeded;/* # of address violations */
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};
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/*
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* Bridge route node.
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*/
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struct bridge_rtnode {
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LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */
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LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */
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struct bridge_iflist *brt_dst; /* destination if */
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unsigned long brt_expire; /* expiration time */
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uint8_t brt_flags; /* address flags */
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uint8_t brt_addr[ETHER_ADDR_LEN];
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uint16_t brt_vlan; /* vlan id */
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};
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#define brt_ifp brt_dst->bif_ifp
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/*
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* Software state for each bridge.
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*/
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struct bridge_softc {
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struct ifnet *sc_ifp; /* make this an interface */
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LIST_ENTRY(bridge_softc) sc_list;
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struct mtx sc_mtx;
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struct cv sc_cv;
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uint32_t sc_brtmax; /* max # of addresses */
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uint32_t sc_brtcnt; /* cur. # of addresses */
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uint32_t sc_brttimeout; /* rt timeout in seconds */
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struct callout sc_brcallout; /* bridge callout */
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uint32_t sc_iflist_ref; /* refcount for sc_iflist */
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uint32_t sc_iflist_xcnt; /* refcount for sc_iflist */
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LIST_HEAD(, bridge_iflist) sc_iflist; /* member interface list */
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LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */
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LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */
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uint32_t sc_rthash_key; /* key for hash */
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LIST_HEAD(, bridge_iflist) sc_spanlist; /* span ports list */
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struct bstp_state sc_stp; /* STP state */
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uint32_t sc_brtexceeded; /* # of cache drops */
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struct ifnet *sc_ifaddr; /* member mac copied from */
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u_char sc_defaddr[6]; /* Default MAC address */
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};
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static VNET_DEFINE(struct mtx, bridge_list_mtx);
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#define V_bridge_list_mtx VNET(bridge_list_mtx)
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eventhandler_tag bridge_detach_cookie = NULL;
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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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static int bridge_clone_create(struct if_clone *, int, caddr_t);
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static void bridge_clone_destroy(struct ifnet *);
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static int bridge_ioctl(struct ifnet *, u_long, caddr_t);
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static void bridge_mutecaps(struct bridge_softc *);
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static void bridge_set_ifcap(struct bridge_softc *, struct bridge_iflist *,
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int);
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static void bridge_ifdetach(void *arg __unused, struct ifnet *);
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static void bridge_init(void *);
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static void bridge_dummynet(struct mbuf *, struct ifnet *);
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static void bridge_stop(struct ifnet *, int);
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static int bridge_transmit(struct ifnet *, struct mbuf *);
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static void bridge_qflush(struct ifnet *);
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static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
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static int bridge_output(struct ifnet *, struct mbuf *, struct sockaddr *,
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struct rtentry *);
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static int bridge_enqueue(struct bridge_softc *, struct ifnet *,
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struct mbuf *);
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static void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp, int);
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static void bridge_forward(struct bridge_softc *, struct bridge_iflist *,
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struct mbuf *m);
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static void bridge_timer(void *);
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static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
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struct mbuf *, int);
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static void bridge_span(struct bridge_softc *, struct mbuf *);
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static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
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uint16_t, struct bridge_iflist *, int, uint8_t);
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static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *,
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uint16_t);
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static void bridge_rttrim(struct bridge_softc *);
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static void bridge_rtage(struct bridge_softc *);
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static void bridge_rtflush(struct bridge_softc *, int);
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static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *,
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uint16_t);
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static void bridge_rtable_init(struct bridge_softc *);
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static void bridge_rtable_fini(struct bridge_softc *);
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static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
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static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
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const uint8_t *, uint16_t);
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static int bridge_rtnode_insert(struct bridge_softc *,
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struct bridge_rtnode *);
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static void bridge_rtnode_destroy(struct bridge_softc *,
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struct bridge_rtnode *);
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static void bridge_rtable_expire(struct ifnet *, int);
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static void bridge_state_change(struct ifnet *, int);
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static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
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const char *name);
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static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
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struct ifnet *ifp);
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static void bridge_delete_member(struct bridge_softc *,
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struct bridge_iflist *, int);
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static void bridge_delete_span(struct bridge_softc *,
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struct bridge_iflist *);
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static int bridge_ioctl_add(struct bridge_softc *, void *);
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static int bridge_ioctl_del(struct bridge_softc *, void *);
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static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
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static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
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static int bridge_ioctl_scache(struct bridge_softc *, void *);
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static int bridge_ioctl_gcache(struct bridge_softc *, void *);
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static int bridge_ioctl_gifs(struct bridge_softc *, void *);
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static int bridge_ioctl_rts(struct bridge_softc *, void *);
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static int bridge_ioctl_saddr(struct bridge_softc *, void *);
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static int bridge_ioctl_sto(struct bridge_softc *, void *);
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static int bridge_ioctl_gto(struct bridge_softc *, void *);
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static int bridge_ioctl_daddr(struct bridge_softc *, void *);
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static int bridge_ioctl_flush(struct bridge_softc *, void *);
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static int bridge_ioctl_gpri(struct bridge_softc *, void *);
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static int bridge_ioctl_spri(struct bridge_softc *, void *);
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static int bridge_ioctl_ght(struct bridge_softc *, void *);
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static int bridge_ioctl_sht(struct bridge_softc *, void *);
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static int bridge_ioctl_gfd(struct bridge_softc *, void *);
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static int bridge_ioctl_sfd(struct bridge_softc *, void *);
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static int bridge_ioctl_gma(struct bridge_softc *, void *);
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static int bridge_ioctl_sma(struct bridge_softc *, void *);
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static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
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static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
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static int bridge_ioctl_sifmaxaddr(struct bridge_softc *, void *);
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static int bridge_ioctl_addspan(struct bridge_softc *, void *);
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static int bridge_ioctl_delspan(struct bridge_softc *, void *);
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static int bridge_ioctl_gbparam(struct bridge_softc *, void *);
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static int bridge_ioctl_grte(struct bridge_softc *, void *);
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static int bridge_ioctl_gifsstp(struct bridge_softc *, void *);
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static int bridge_ioctl_sproto(struct bridge_softc *, void *);
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static int bridge_ioctl_stxhc(struct bridge_softc *, void *);
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static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
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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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static int bridge_fragment(struct ifnet *, struct mbuf *,
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struct ether_header *, int, struct llc *);
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static void bridge_linkstate(struct ifnet *ifp);
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static void bridge_linkcheck(struct bridge_softc *sc);
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extern void (*bridge_linkstate_p)(struct ifnet *ifp);
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/* The default bridge vlan is 1 (IEEE 802.1Q-2003 Table 9-2) */
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#define VLANTAGOF(_m) \
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(_m->m_flags & M_VLANTAG) ? EVL_VLANOFTAG(_m->m_pkthdr.ether_vtag) : 1
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static struct bstp_cb_ops bridge_ops = {
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.bcb_state = bridge_state_change,
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.bcb_rtage = bridge_rtable_expire
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};
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SYSCTL_DECL(_net_link);
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static SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
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/* only pass IP[46] packets when pfil is enabled */
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static VNET_DEFINE(int, pfil_onlyip) = 1;
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#define V_pfil_onlyip VNET(pfil_onlyip)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(pfil_onlyip), 0,
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"Only pass IP packets when pfil is enabled");
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/* run pfil hooks on the bridge interface */
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static VNET_DEFINE(int, pfil_bridge) = 1;
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#define V_pfil_bridge VNET(pfil_bridge)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(pfil_bridge), 0,
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"Packet filter on the bridge interface");
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/* layer2 filter with ipfw */
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static VNET_DEFINE(int, pfil_ipfw);
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#define V_pfil_ipfw VNET(pfil_ipfw)
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/* layer2 ARP filter with ipfw */
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static VNET_DEFINE(int, pfil_ipfw_arp);
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#define V_pfil_ipfw_arp VNET(pfil_ipfw_arp)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, ipfw_arp,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(pfil_ipfw_arp), 0,
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"Filter ARP packets through IPFW layer2");
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/* run pfil hooks on the member interface */
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static VNET_DEFINE(int, pfil_member) = 1;
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#define V_pfil_member VNET(pfil_member)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(pfil_member), 0,
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"Packet filter on the member interface");
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/* run pfil hooks on the physical interface for locally destined packets */
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static VNET_DEFINE(int, pfil_local_phys);
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#define V_pfil_local_phys VNET(pfil_local_phys)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_local_phys,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(pfil_local_phys), 0,
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"Packet filter on the physical interface for locally destined packets");
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/* log STP state changes */
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static VNET_DEFINE(int, log_stp);
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#define V_log_stp VNET(log_stp)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, log_stp,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(log_stp), 0,
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"Log STP state changes");
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/* share MAC with first bridge member */
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static VNET_DEFINE(int, bridge_inherit_mac);
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#define V_bridge_inherit_mac VNET(bridge_inherit_mac)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, inherit_mac,
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CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(bridge_inherit_mac), 0,
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"Inherit MAC address from the first bridge member");
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static VNET_DEFINE(int, allow_llz_overlap) = 0;
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#define V_allow_llz_overlap VNET(allow_llz_overlap)
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SYSCTL_INT(_net_link_bridge, OID_AUTO, allow_llz_overlap,
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CTLFLAG_VNET | CTLFLAG_RW | CTLFLAG_VNET, &VNET_NAME(allow_llz_overlap), 0,
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"Allow overlap of link-local scope "
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"zones of a bridge interface and the member interfaces");
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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 },
|
|
{ bridge_ioctl_del, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_gifflags, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_COPYOUT },
|
|
{ bridge_ioctl_sifflags, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_scache, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
{ bridge_ioctl_gcache, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
|
|
{ bridge_ioctl_gifs, sizeof(struct ifbifconf),
|
|
BC_F_COPYIN|BC_F_COPYOUT },
|
|
{ bridge_ioctl_rts, sizeof(struct ifbaconf),
|
|
BC_F_COPYIN|BC_F_COPYOUT },
|
|
|
|
{ bridge_ioctl_saddr, sizeof(struct ifbareq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_sto, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
{ bridge_ioctl_gto, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
|
|
{ bridge_ioctl_daddr, sizeof(struct ifbareq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_flush, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_gpri, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
{ bridge_ioctl_spri, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_ght, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
{ bridge_ioctl_sht, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_gfd, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
{ bridge_ioctl_sfd, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_gma, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
{ bridge_ioctl_sma, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_sifprio, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_sifcost, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_addspan, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
{ bridge_ioctl_delspan, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_gbparam, sizeof(struct ifbropreq),
|
|
BC_F_COPYOUT },
|
|
|
|
{ bridge_ioctl_grte, sizeof(struct ifbrparam),
|
|
BC_F_COPYOUT },
|
|
|
|
{ bridge_ioctl_gifsstp, sizeof(struct ifbpstpconf),
|
|
BC_F_COPYIN|BC_F_COPYOUT },
|
|
|
|
{ bridge_ioctl_sproto, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_stxhc, sizeof(struct ifbrparam),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
{ bridge_ioctl_sifmaxaddr, sizeof(struct ifbreq),
|
|
BC_F_COPYIN|BC_F_SUSER },
|
|
|
|
};
|
|
const int bridge_control_table_size = nitems(bridge_control_table);
|
|
|
|
static VNET_DEFINE(LIST_HEAD(, bridge_softc), bridge_list);
|
|
#define V_bridge_list VNET(bridge_list)
|
|
#define BRIDGE_LIST_LOCK_INIT(x) mtx_init(&V_bridge_list_mtx, \
|
|
"if_bridge list", NULL, MTX_DEF)
|
|
#define BRIDGE_LIST_LOCK_DESTROY(x) mtx_destroy(&V_bridge_list_mtx)
|
|
#define BRIDGE_LIST_LOCK(x) mtx_lock(&V_bridge_list_mtx)
|
|
#define BRIDGE_LIST_UNLOCK(x) mtx_unlock(&V_bridge_list_mtx)
|
|
|
|
static VNET_DEFINE(struct if_clone *, bridge_cloner);
|
|
#define V_bridge_cloner VNET(bridge_cloner)
|
|
|
|
static const char bridge_name[] = "bridge";
|
|
|
|
static void
|
|
vnet_bridge_init(const void *unused __unused)
|
|
{
|
|
|
|
BRIDGE_LIST_LOCK_INIT();
|
|
LIST_INIT(&V_bridge_list);
|
|
V_bridge_cloner = if_clone_simple(bridge_name,
|
|
bridge_clone_create, bridge_clone_destroy, 0);
|
|
}
|
|
VNET_SYSINIT(vnet_bridge_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
|
|
vnet_bridge_init, NULL);
|
|
|
|
static void
|
|
vnet_bridge_uninit(const void *unused __unused)
|
|
{
|
|
|
|
if_clone_detach(V_bridge_cloner);
|
|
BRIDGE_LIST_LOCK_DESTROY();
|
|
}
|
|
VNET_SYSUNINIT(vnet_bridge_uninit, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
|
|
vnet_bridge_uninit, NULL);
|
|
|
|
static int
|
|
bridge_modevent(module_t mod, int type, void *data)
|
|
{
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
bridge_rtnode_zone = uma_zcreate("bridge_rtnode",
|
|
sizeof(struct bridge_rtnode), NULL, NULL, NULL, NULL,
|
|
UMA_ALIGN_PTR, 0);
|
|
bridge_input_p = bridge_input;
|
|
bridge_output_p = bridge_output;
|
|
bridge_dn_p = bridge_dummynet;
|
|
bridge_linkstate_p = bridge_linkstate;
|
|
bridge_detach_cookie = EVENTHANDLER_REGISTER(
|
|
ifnet_departure_event, bridge_ifdetach, NULL,
|
|
EVENTHANDLER_PRI_ANY);
|
|
break;
|
|
case MOD_UNLOAD:
|
|
EVENTHANDLER_DEREGISTER(ifnet_departure_event,
|
|
bridge_detach_cookie);
|
|
uma_zdestroy(bridge_rtnode_zone);
|
|
bridge_input_p = NULL;
|
|
bridge_output_p = NULL;
|
|
bridge_dn_p = NULL;
|
|
bridge_linkstate_p = NULL;
|
|
break;
|
|
default:
|
|
return (EOPNOTSUPP);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static moduledata_t bridge_mod = {
|
|
"if_bridge",
|
|
bridge_modevent,
|
|
0
|
|
};
|
|
|
|
DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
|
|
MODULE_DEPEND(if_bridge, bridgestp, 1, 1, 1);
|
|
|
|
/*
|
|
* handler for net.link.bridge.ipfw
|
|
*/
|
|
static int
|
|
sysctl_pfil_ipfw(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int enable = V_pfil_ipfw;
|
|
int error;
|
|
|
|
error = sysctl_handle_int(oidp, &enable, 0, req);
|
|
enable &= 1;
|
|
|
|
if (enable != V_pfil_ipfw) {
|
|
V_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. Also allow non-ip packets as ipfw can filter by
|
|
* layer2 type.
|
|
*/
|
|
if (V_pfil_ipfw) {
|
|
V_pfil_onlyip = 0;
|
|
V_pfil_bridge = 0;
|
|
V_pfil_member = 0;
|
|
}
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
SYSCTL_PROC(_net_link_bridge, OID_AUTO, ipfw,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_VNET,
|
|
&VNET_NAME(pfil_ipfw), 0, &sysctl_pfil_ipfw, "I",
|
|
"Layer2 filter with IPFW");
|
|
|
|
/*
|
|
* bridge_clone_create:
|
|
*
|
|
* Create a new bridge instance.
|
|
*/
|
|
static int
|
|
bridge_clone_create(struct if_clone *ifc, int unit, caddr_t params)
|
|
{
|
|
struct bridge_softc *sc, *sc2;
|
|
struct ifnet *bifp, *ifp;
|
|
int fb, retry;
|
|
unsigned long hostid;
|
|
|
|
sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
|
|
ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
|
|
if (ifp == NULL) {
|
|
free(sc, M_DEVBUF);
|
|
return (ENOSPC);
|
|
}
|
|
|
|
BRIDGE_LOCK_INIT(sc);
|
|
sc->sc_brtmax = BRIDGE_RTABLE_MAX;
|
|
sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
|
|
|
|
/* Initialize our routing table. */
|
|
bridge_rtable_init(sc);
|
|
|
|
callout_init_mtx(&sc->sc_brcallout, &sc->sc_mtx, 0);
|
|
|
|
LIST_INIT(&sc->sc_iflist);
|
|
LIST_INIT(&sc->sc_spanlist);
|
|
|
|
ifp->if_softc = sc;
|
|
if_initname(ifp, bridge_name, unit);
|
|
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
|
|
ifp->if_ioctl = bridge_ioctl;
|
|
ifp->if_transmit = bridge_transmit;
|
|
ifp->if_qflush = bridge_qflush;
|
|
ifp->if_init = bridge_init;
|
|
ifp->if_type = IFT_BRIDGE;
|
|
|
|
/*
|
|
* Generate an ethernet address with a locally administered address.
|
|
*
|
|
* Since we are using random ethernet addresses for the bridge, it is
|
|
* possible that we might have address collisions, so make sure that
|
|
* this hardware address isn't already in use on another bridge.
|
|
* The first try uses the hostid and falls back to arc4rand().
|
|
*/
|
|
fb = 0;
|
|
getcredhostid(curthread->td_ucred, &hostid);
|
|
do {
|
|
if (fb || hostid == 0) {
|
|
arc4rand(sc->sc_defaddr, ETHER_ADDR_LEN, 1);
|
|
sc->sc_defaddr[0] &= ~1;/* clear multicast bit */
|
|
sc->sc_defaddr[0] |= 2; /* set the LAA bit */
|
|
} else {
|
|
sc->sc_defaddr[0] = 0x2;
|
|
sc->sc_defaddr[1] = (hostid >> 24) & 0xff;
|
|
sc->sc_defaddr[2] = (hostid >> 16) & 0xff;
|
|
sc->sc_defaddr[3] = (hostid >> 8 ) & 0xff;
|
|
sc->sc_defaddr[4] = hostid & 0xff;
|
|
sc->sc_defaddr[5] = ifp->if_dunit & 0xff;
|
|
}
|
|
|
|
fb = 1;
|
|
retry = 0;
|
|
BRIDGE_LIST_LOCK();
|
|
LIST_FOREACH(sc2, &V_bridge_list, sc_list) {
|
|
bifp = sc2->sc_ifp;
|
|
if (memcmp(sc->sc_defaddr,
|
|
IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
|
|
retry = 1;
|
|
break;
|
|
}
|
|
}
|
|
BRIDGE_LIST_UNLOCK();
|
|
} while (retry == 1);
|
|
|
|
bstp_attach(&sc->sc_stp, &bridge_ops);
|
|
ether_ifattach(ifp, sc->sc_defaddr);
|
|
/* Now undo some of the damage... */
|
|
ifp->if_baudrate = 0;
|
|
ifp->if_type = IFT_BRIDGE;
|
|
|
|
BRIDGE_LIST_LOCK();
|
|
LIST_INSERT_HEAD(&V_bridge_list, sc, sc_list);
|
|
BRIDGE_LIST_UNLOCK();
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* bridge_clone_destroy:
|
|
*
|
|
* Destroy a bridge instance.
|
|
*/
|
|
static 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);
|
|
ifp->if_flags &= ~IFF_UP;
|
|
|
|
while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
|
|
bridge_delete_member(sc, bif, 0);
|
|
|
|
while ((bif = LIST_FIRST(&sc->sc_spanlist)) != NULL) {
|
|
bridge_delete_span(sc, bif);
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
callout_drain(&sc->sc_brcallout);
|
|
|
|
BRIDGE_LIST_LOCK();
|
|
LIST_REMOVE(sc, sc_list);
|
|
BRIDGE_LIST_UNLOCK();
|
|
|
|
bstp_detach(&sc->sc_stp);
|
|
ether_ifdetach(ifp);
|
|
if_free(ifp);
|
|
|
|
/* 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.
|
|
*/
|
|
static int
|
|
bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_softc;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
struct bridge_iflist *bif;
|
|
struct thread *td = curthread;
|
|
union {
|
|
struct ifbreq ifbreq;
|
|
struct ifbifconf ifbifconf;
|
|
struct ifbareq ifbareq;
|
|
struct ifbaconf ifbaconf;
|
|
struct ifbrparam ifbrparam;
|
|
struct ifbropreq ifbropreq;
|
|
} args;
|
|
struct ifdrv *ifd = (struct ifdrv *) data;
|
|
const struct bridge_control *bc;
|
|
int error = 0;
|
|
|
|
switch (cmd) {
|
|
|
|
case SIOCADDMULTI:
|
|
case SIOCDELMULTI:
|
|
break;
|
|
|
|
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 = priv_check(td, PRIV_NET_BRIDGE);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
if (ifd->ifd_len != bc->bc_argsize ||
|
|
ifd->ifd_len > sizeof(args)) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
bzero(&args, sizeof(args));
|
|
if (bc->bc_flags & BC_F_COPYIN) {
|
|
error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
BRIDGE_LOCK(sc);
|
|
error = (*bc->bc_func)(sc, &args);
|
|
BRIDGE_UNLOCK(sc);
|
|
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) &&
|
|
(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
|
|
/*
|
|
* If interface is marked down and it is running,
|
|
* then stop and disable it.
|
|
*/
|
|
BRIDGE_LOCK(sc);
|
|
bridge_stop(ifp, 1);
|
|
BRIDGE_UNLOCK(sc);
|
|
} else if ((ifp->if_flags & IFF_UP) &&
|
|
!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
|
|
/*
|
|
* If interface is marked up and it is stopped, then
|
|
* start it.
|
|
*/
|
|
(*ifp->if_init)(sc);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
if (ifr->ifr_mtu < 576) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (LIST_EMPTY(&sc->sc_iflist)) {
|
|
sc->sc_ifp->if_mtu = ifr->ifr_mtu;
|
|
break;
|
|
}
|
|
BRIDGE_LOCK(sc);
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
if (bif->bif_ifp->if_mtu != ifr->ifr_mtu) {
|
|
log(LOG_NOTICE, "%s: invalid MTU: %u(%s)"
|
|
" != %d\n", sc->sc_ifp->if_xname,
|
|
bif->bif_ifp->if_mtu,
|
|
bif->bif_ifp->if_xname, ifr->ifr_mtu);
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
if (!error)
|
|
sc->sc_ifp->if_mtu = ifr->ifr_mtu;
|
|
BRIDGE_UNLOCK(sc);
|
|
break;
|
|
default:
|
|
/*
|
|
* drop the lock as ether_ioctl() will call bridge_start() and
|
|
* cause the lock to be recursed.
|
|
*/
|
|
error = ether_ioctl(ifp, cmd, data);
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* bridge_mutecaps:
|
|
*
|
|
* Clear or restore unwanted capabilities on the member interface
|
|
*/
|
|
static void
|
|
bridge_mutecaps(struct bridge_softc *sc)
|
|
{
|
|
struct bridge_iflist *bif;
|
|
int enabled, mask;
|
|
|
|
/* Initial bitmask of capabilities to test */
|
|
mask = BRIDGE_IFCAPS_MASK;
|
|
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
/* Every member must support it or its disabled */
|
|
mask &= bif->bif_savedcaps;
|
|
}
|
|
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
enabled = bif->bif_ifp->if_capenable;
|
|
enabled &= ~BRIDGE_IFCAPS_STRIP;
|
|
/* strip off mask bits and enable them again if allowed */
|
|
enabled &= ~BRIDGE_IFCAPS_MASK;
|
|
enabled |= mask;
|
|
bridge_set_ifcap(sc, bif, enabled);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
bridge_set_ifcap(struct bridge_softc *sc, struct bridge_iflist *bif, int set)
|
|
{
|
|
struct ifnet *ifp = bif->bif_ifp;
|
|
struct ifreq ifr;
|
|
int error;
|
|
|
|
bzero(&ifr, sizeof(ifr));
|
|
ifr.ifr_reqcap = set;
|
|
|
|
if (ifp->if_capenable != set) {
|
|
error = (*ifp->if_ioctl)(ifp, SIOCSIFCAP, (caddr_t)&ifr);
|
|
if (error)
|
|
if_printf(sc->sc_ifp,
|
|
"error setting interface capabilities on %s\n",
|
|
ifp->if_xname);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* bridge_lookup_member:
|
|
*
|
|
* Lookup a bridge member interface.
|
|
*/
|
|
static 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*.
|
|
*/
|
|
static 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.
|
|
*/
|
|
static void
|
|
bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
|
|
int gone)
|
|
{
|
|
struct ifnet *ifs = bif->bif_ifp;
|
|
struct ifnet *fif = NULL;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if (bif->bif_flags & IFBIF_STP)
|
|
bstp_disable(&bif->bif_stp);
|
|
|
|
ifs->if_bridge = NULL;
|
|
BRIDGE_XLOCK(sc);
|
|
LIST_REMOVE(bif, bif_next);
|
|
BRIDGE_XDROP(sc);
|
|
|
|
/*
|
|
* If removing the interface that gave the bridge its mac address, set
|
|
* the mac address of the bridge to the address of the next member, or
|
|
* to its default address if no members are left.
|
|
*/
|
|
if (V_bridge_inherit_mac && sc->sc_ifaddr == ifs) {
|
|
if (LIST_EMPTY(&sc->sc_iflist)) {
|
|
bcopy(sc->sc_defaddr,
|
|
IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
|
|
sc->sc_ifaddr = NULL;
|
|
} else {
|
|
fif = LIST_FIRST(&sc->sc_iflist)->bif_ifp;
|
|
bcopy(IF_LLADDR(fif),
|
|
IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
|
|
sc->sc_ifaddr = fif;
|
|
}
|
|
EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
|
|
}
|
|
|
|
bridge_linkcheck(sc);
|
|
bridge_mutecaps(sc); /* recalcuate now this interface is removed */
|
|
bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
|
|
KASSERT(bif->bif_addrcnt == 0,
|
|
("%s: %d bridge routes referenced", __func__, bif->bif_addrcnt));
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
if (!gone) {
|
|
switch (ifs->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_L2VLAN:
|
|
/*
|
|
* Take the interface out of promiscuous mode.
|
|
*/
|
|
(void) ifpromisc(ifs, 0);
|
|
break;
|
|
|
|
case IFT_GIF:
|
|
break;
|
|
|
|
default:
|
|
#ifdef DIAGNOSTIC
|
|
panic("bridge_delete_member: impossible");
|
|
#endif
|
|
break;
|
|
}
|
|
/* reneable any interface capabilities */
|
|
bridge_set_ifcap(sc, bif, bif->bif_savedcaps);
|
|
}
|
|
bstp_destroy(&bif->bif_stp); /* prepare to free */
|
|
BRIDGE_LOCK(sc);
|
|
free(bif, M_DEVBUF);
|
|
}
|
|
|
|
/*
|
|
* bridge_delete_span:
|
|
*
|
|
* Delete the specified span interface.
|
|
*/
|
|
static void
|
|
bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
|
|
{
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
KASSERT(bif->bif_ifp->if_bridge == NULL,
|
|
("%s: not a span interface", __func__));
|
|
|
|
LIST_REMOVE(bif, bif_next);
|
|
free(bif, M_DEVBUF);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_add(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif = NULL;
|
|
struct ifnet *ifs;
|
|
int error = 0;
|
|
|
|
ifs = ifunit(req->ifbr_ifsname);
|
|
if (ifs == NULL)
|
|
return (ENOENT);
|
|
if (ifs->if_ioctl == NULL) /* must be supported */
|
|
return (EINVAL);
|
|
|
|
/* If it's in the span list, it can't be a member. */
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
|
|
if (ifs == bif->bif_ifp)
|
|
return (EBUSY);
|
|
|
|
if (ifs->if_bridge == sc)
|
|
return (EEXIST);
|
|
|
|
if (ifs->if_bridge != NULL)
|
|
return (EBUSY);
|
|
|
|
switch (ifs->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_L2VLAN:
|
|
case IFT_GIF:
|
|
/* permitted interface types */
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
#ifdef INET6
|
|
/*
|
|
* Two valid inet6 addresses with link-local scope must not be
|
|
* on the parent interface and the member interfaces at the
|
|
* same time. This restriction is needed to prevent violation
|
|
* of link-local scope zone. Attempts to add a member
|
|
* interface which has inet6 addresses when the parent has
|
|
* inet6 triggers removal of all inet6 addresses on the member
|
|
* interface.
|
|
*/
|
|
|
|
/* Check if the parent interface has a link-local scope addr. */
|
|
if (V_allow_llz_overlap == 0 &&
|
|
in6ifa_llaonifp(sc->sc_ifp) != NULL) {
|
|
/*
|
|
* If any, remove all inet6 addresses from the member
|
|
* interfaces.
|
|
*/
|
|
BRIDGE_XLOCK(sc);
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
if (in6ifa_llaonifp(bif->bif_ifp)) {
|
|
BRIDGE_UNLOCK(sc);
|
|
in6_ifdetach(bif->bif_ifp);
|
|
BRIDGE_LOCK(sc);
|
|
if_printf(sc->sc_ifp,
|
|
"IPv6 addresses on %s have been removed "
|
|
"before adding it as a member to prevent "
|
|
"IPv6 address scope violation.\n",
|
|
bif->bif_ifp->if_xname);
|
|
}
|
|
}
|
|
BRIDGE_XDROP(sc);
|
|
if (in6ifa_llaonifp(ifs)) {
|
|
BRIDGE_UNLOCK(sc);
|
|
in6_ifdetach(ifs);
|
|
BRIDGE_LOCK(sc);
|
|
if_printf(sc->sc_ifp,
|
|
"IPv6 addresses on %s have been removed "
|
|
"before adding it as a member to prevent "
|
|
"IPv6 address scope violation.\n",
|
|
ifs->if_xname);
|
|
}
|
|
}
|
|
#endif
|
|
/* Allow the first Ethernet 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: %u(%s) != %u\n",
|
|
ifs->if_mtu, ifs->if_xname, sc->sc_ifp->if_mtu);
|
|
return (EINVAL);
|
|
}
|
|
|
|
bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
|
|
if (bif == NULL)
|
|
return (ENOMEM);
|
|
|
|
bif->bif_ifp = ifs;
|
|
bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
|
|
bif->bif_savedcaps = ifs->if_capenable;
|
|
|
|
/*
|
|
* Assign the interface's MAC address to the bridge if it's the first
|
|
* member and the MAC address of the bridge has not been changed from
|
|
* the default randomly generated one.
|
|
*/
|
|
if (V_bridge_inherit_mac && LIST_EMPTY(&sc->sc_iflist) &&
|
|
!memcmp(IF_LLADDR(sc->sc_ifp), sc->sc_defaddr, ETHER_ADDR_LEN)) {
|
|
bcopy(IF_LLADDR(ifs), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
|
|
sc->sc_ifaddr = ifs;
|
|
EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
|
|
}
|
|
|
|
ifs->if_bridge = sc;
|
|
bstp_create(&sc->sc_stp, &bif->bif_stp, bif->bif_ifp);
|
|
/*
|
|
* XXX: XLOCK HERE!?!
|
|
*
|
|
* NOTE: insert_***HEAD*** should be safe for the traversals.
|
|
*/
|
|
LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
|
|
|
|
/* Set interface capabilities to the intersection set of all members */
|
|
bridge_mutecaps(sc);
|
|
bridge_linkcheck(sc);
|
|
|
|
/* Place the interface into promiscuous mode */
|
|
switch (ifs->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_L2VLAN:
|
|
BRIDGE_UNLOCK(sc);
|
|
error = ifpromisc(ifs, 1);
|
|
BRIDGE_LOCK(sc);
|
|
break;
|
|
}
|
|
|
|
if (error) {
|
|
bridge_delete_member(sc, bif, 0);
|
|
free(bif, M_DEVBUF);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_del(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
bridge_delete_member(sc, bif, 0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
struct bstp_port *bp;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
bp = &bif->bif_stp;
|
|
req->ifbr_ifsflags = bif->bif_flags;
|
|
req->ifbr_state = bp->bp_state;
|
|
req->ifbr_priority = bp->bp_priority;
|
|
req->ifbr_path_cost = bp->bp_path_cost;
|
|
req->ifbr_portno = bif->bif_ifp->if_index & 0xfff;
|
|
req->ifbr_proto = bp->bp_protover;
|
|
req->ifbr_role = bp->bp_role;
|
|
req->ifbr_stpflags = bp->bp_flags;
|
|
req->ifbr_addrcnt = bif->bif_addrcnt;
|
|
req->ifbr_addrmax = bif->bif_addrmax;
|
|
req->ifbr_addrexceeded = bif->bif_addrexceeded;
|
|
|
|
/* Copy STP state options as flags */
|
|
if (bp->bp_operedge)
|
|
req->ifbr_ifsflags |= IFBIF_BSTP_EDGE;
|
|
if (bp->bp_flags & BSTP_PORT_AUTOEDGE)
|
|
req->ifbr_ifsflags |= IFBIF_BSTP_AUTOEDGE;
|
|
if (bp->bp_ptp_link)
|
|
req->ifbr_ifsflags |= IFBIF_BSTP_PTP;
|
|
if (bp->bp_flags & BSTP_PORT_AUTOPTP)
|
|
req->ifbr_ifsflags |= IFBIF_BSTP_AUTOPTP;
|
|
if (bp->bp_flags & BSTP_PORT_ADMEDGE)
|
|
req->ifbr_ifsflags |= IFBIF_BSTP_ADMEDGE;
|
|
if (bp->bp_flags & BSTP_PORT_ADMCOST)
|
|
req->ifbr_ifsflags |= IFBIF_BSTP_ADMCOST;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
struct bstp_port *bp;
|
|
int error;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
bp = &bif->bif_stp;
|
|
|
|
if (req->ifbr_ifsflags & IFBIF_SPAN)
|
|
/* SPAN is readonly */
|
|
return (EINVAL);
|
|
|
|
if (req->ifbr_ifsflags & IFBIF_STP) {
|
|
if ((bif->bif_flags & IFBIF_STP) == 0) {
|
|
error = bstp_enable(&bif->bif_stp);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
} else {
|
|
if ((bif->bif_flags & IFBIF_STP) != 0)
|
|
bstp_disable(&bif->bif_stp);
|
|
}
|
|
|
|
/* Pass on STP flags */
|
|
bstp_set_edge(bp, req->ifbr_ifsflags & IFBIF_BSTP_EDGE ? 1 : 0);
|
|
bstp_set_autoedge(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOEDGE ? 1 : 0);
|
|
bstp_set_ptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_PTP ? 1 : 0);
|
|
bstp_set_autoptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOPTP ? 1 : 0);
|
|
|
|
/* Save the bits relating to the bridge */
|
|
bif->bif_flags = req->ifbr_ifsflags & IFBIFMASK;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
sc->sc_brtmax = param->ifbrp_csize;
|
|
bridge_rttrim(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
param->ifbrp_csize = sc->sc_brtmax;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbifconf *bifc = arg;
|
|
struct bridge_iflist *bif;
|
|
struct ifbreq breq;
|
|
char *buf, *outbuf;
|
|
int count, buflen, len, error = 0;
|
|
|
|
count = 0;
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
|
|
count++;
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
|
|
count++;
|
|
|
|
buflen = sizeof(breq) * count;
|
|
if (bifc->ifbic_len == 0) {
|
|
bifc->ifbic_len = buflen;
|
|
return (0);
|
|
}
|
|
BRIDGE_UNLOCK(sc);
|
|
outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
|
|
BRIDGE_LOCK(sc);
|
|
|
|
count = 0;
|
|
buf = outbuf;
|
|
len = min(bifc->ifbic_len, buflen);
|
|
bzero(&breq, sizeof(breq));
|
|
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));
|
|
/* Fill in the ifbreq structure */
|
|
error = bridge_ioctl_gifflags(sc, &breq);
|
|
if (error)
|
|
break;
|
|
memcpy(buf, &breq, sizeof(breq));
|
|
count++;
|
|
buf += sizeof(breq);
|
|
len -= sizeof(breq);
|
|
}
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, 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_portno = bif->bif_ifp->if_index & 0xfff;
|
|
memcpy(buf, &breq, sizeof(breq));
|
|
count++;
|
|
buf += sizeof(breq);
|
|
len -= sizeof(breq);
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
bifc->ifbic_len = sizeof(breq) * count;
|
|
error = copyout(outbuf, bifc->ifbic_req, bifc->ifbic_len);
|
|
BRIDGE_LOCK(sc);
|
|
free(outbuf, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbaconf *bac = arg;
|
|
struct bridge_rtnode *brt;
|
|
struct ifbareq bareq;
|
|
char *buf, *outbuf;
|
|
int count, buflen, len, error = 0;
|
|
|
|
if (bac->ifbac_len == 0)
|
|
return (0);
|
|
|
|
count = 0;
|
|
LIST_FOREACH(brt, &sc->sc_rtlist, brt_list)
|
|
count++;
|
|
buflen = sizeof(bareq) * count;
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
|
|
BRIDGE_LOCK(sc);
|
|
|
|
count = 0;
|
|
buf = outbuf;
|
|
len = min(bac->ifbac_len, buflen);
|
|
bzero(&bareq, sizeof(bareq));
|
|
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));
|
|
bareq.ifba_vlan = brt->brt_vlan;
|
|
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
|
|
time_uptime < brt->brt_expire)
|
|
bareq.ifba_expire = brt->brt_expire - time_uptime;
|
|
else
|
|
bareq.ifba_expire = 0;
|
|
bareq.ifba_flags = brt->brt_flags;
|
|
|
|
memcpy(buf, &bareq, sizeof(bareq));
|
|
count++;
|
|
buf += sizeof(bareq);
|
|
len -= sizeof(bareq);
|
|
}
|
|
out:
|
|
BRIDGE_UNLOCK(sc);
|
|
bac->ifbac_len = sizeof(bareq) * count;
|
|
error = copyout(outbuf, bac->ifbac_req, bac->ifbac_len);
|
|
BRIDGE_LOCK(sc);
|
|
free(outbuf, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbareq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
int error;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifba_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
error = bridge_rtupdate(sc, req->ifba_dst, req->ifba_vlan, bif, 1,
|
|
req->ifba_flags);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
sc->sc_brttimeout = param->ifbrp_ctime;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
param->ifbrp_ctime = sc->sc_brttimeout;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbareq *req = arg;
|
|
|
|
return (bridge_rtdaddr(sc, req->ifba_dst, req->ifba_vlan));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
|
|
bridge_rtflush(sc, req->ifbr_ifsflags);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
struct bstp_state *bs = &sc->sc_stp;
|
|
|
|
param->ifbrp_prio = bs->bs_bridge_priority;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
return (bstp_set_priority(&sc->sc_stp, param->ifbrp_prio));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
struct bstp_state *bs = &sc->sc_stp;
|
|
|
|
param->ifbrp_hellotime = bs->bs_bridge_htime >> 8;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
return (bstp_set_htime(&sc->sc_stp, param->ifbrp_hellotime));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
struct bstp_state *bs = &sc->sc_stp;
|
|
|
|
param->ifbrp_fwddelay = bs->bs_bridge_fdelay >> 8;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
return (bstp_set_fdelay(&sc->sc_stp, param->ifbrp_fwddelay));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
struct bstp_state *bs = &sc->sc_stp;
|
|
|
|
param->ifbrp_maxage = bs->bs_bridge_max_age >> 8;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
return (bstp_set_maxage(&sc->sc_stp, param->ifbrp_maxage));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
return (bstp_set_port_priority(&bif->bif_stp, req->ifbr_priority));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
return (bstp_set_path_cost(&bif->bif_stp, req->ifbr_path_cost));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sifmaxaddr(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
|
|
bif = bridge_lookup_member(sc, req->ifbr_ifsname);
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
bif->bif_addrmax = req->ifbr_addrmax;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif = NULL;
|
|
struct ifnet *ifs;
|
|
|
|
ifs = ifunit(req->ifbr_ifsname);
|
|
if (ifs == NULL)
|
|
return (ENOENT);
|
|
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
|
|
if (ifs == bif->bif_ifp)
|
|
return (EBUSY);
|
|
|
|
if (ifs->if_bridge != NULL)
|
|
return (EBUSY);
|
|
|
|
switch (ifs->if_type) {
|
|
case IFT_ETHER:
|
|
case IFT_GIF:
|
|
case IFT_L2VLAN:
|
|
break;
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
|
|
if (bif == NULL)
|
|
return (ENOMEM);
|
|
|
|
bif->bif_ifp = ifs;
|
|
bif->bif_flags = IFBIF_SPAN;
|
|
|
|
LIST_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbreq *req = arg;
|
|
struct bridge_iflist *bif;
|
|
struct ifnet *ifs;
|
|
|
|
ifs = ifunit(req->ifbr_ifsname);
|
|
if (ifs == NULL)
|
|
return (ENOENT);
|
|
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
|
|
if (ifs == bif->bif_ifp)
|
|
break;
|
|
|
|
if (bif == NULL)
|
|
return (ENOENT);
|
|
|
|
bridge_delete_span(sc, bif);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gbparam(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbropreq *req = arg;
|
|
struct bstp_state *bs = &sc->sc_stp;
|
|
struct bstp_port *root_port;
|
|
|
|
req->ifbop_maxage = bs->bs_bridge_max_age >> 8;
|
|
req->ifbop_hellotime = bs->bs_bridge_htime >> 8;
|
|
req->ifbop_fwddelay = bs->bs_bridge_fdelay >> 8;
|
|
|
|
root_port = bs->bs_root_port;
|
|
if (root_port == NULL)
|
|
req->ifbop_root_port = 0;
|
|
else
|
|
req->ifbop_root_port = root_port->bp_ifp->if_index;
|
|
|
|
req->ifbop_holdcount = bs->bs_txholdcount;
|
|
req->ifbop_priority = bs->bs_bridge_priority;
|
|
req->ifbop_protocol = bs->bs_protover;
|
|
req->ifbop_root_path_cost = bs->bs_root_pv.pv_cost;
|
|
req->ifbop_bridgeid = bs->bs_bridge_pv.pv_dbridge_id;
|
|
req->ifbop_designated_root = bs->bs_root_pv.pv_root_id;
|
|
req->ifbop_designated_bridge = bs->bs_root_pv.pv_dbridge_id;
|
|
req->ifbop_last_tc_time.tv_sec = bs->bs_last_tc_time.tv_sec;
|
|
req->ifbop_last_tc_time.tv_usec = bs->bs_last_tc_time.tv_usec;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_grte(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
param->ifbrp_cexceeded = sc->sc_brtexceeded;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_gifsstp(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbpstpconf *bifstp = arg;
|
|
struct bridge_iflist *bif;
|
|
struct bstp_port *bp;
|
|
struct ifbpstpreq bpreq;
|
|
char *buf, *outbuf;
|
|
int count, buflen, len, error = 0;
|
|
|
|
count = 0;
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
if ((bif->bif_flags & IFBIF_STP) != 0)
|
|
count++;
|
|
}
|
|
|
|
buflen = sizeof(bpreq) * count;
|
|
if (bifstp->ifbpstp_len == 0) {
|
|
bifstp->ifbpstp_len = buflen;
|
|
return (0);
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
|
|
BRIDGE_LOCK(sc);
|
|
|
|
count = 0;
|
|
buf = outbuf;
|
|
len = min(bifstp->ifbpstp_len, buflen);
|
|
bzero(&bpreq, sizeof(bpreq));
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
if (len < sizeof(bpreq))
|
|
break;
|
|
|
|
if ((bif->bif_flags & IFBIF_STP) == 0)
|
|
continue;
|
|
|
|
bp = &bif->bif_stp;
|
|
bpreq.ifbp_portno = bif->bif_ifp->if_index & 0xfff;
|
|
bpreq.ifbp_fwd_trans = bp->bp_forward_transitions;
|
|
bpreq.ifbp_design_cost = bp->bp_desg_pv.pv_cost;
|
|
bpreq.ifbp_design_port = bp->bp_desg_pv.pv_port_id;
|
|
bpreq.ifbp_design_bridge = bp->bp_desg_pv.pv_dbridge_id;
|
|
bpreq.ifbp_design_root = bp->bp_desg_pv.pv_root_id;
|
|
|
|
memcpy(buf, &bpreq, sizeof(bpreq));
|
|
count++;
|
|
buf += sizeof(bpreq);
|
|
len -= sizeof(bpreq);
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
bifstp->ifbpstp_len = sizeof(bpreq) * count;
|
|
error = copyout(outbuf, bifstp->ifbpstp_req, bifstp->ifbpstp_len);
|
|
BRIDGE_LOCK(sc);
|
|
free(outbuf, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_sproto(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
return (bstp_set_protocol(&sc->sc_stp, param->ifbrp_proto));
|
|
}
|
|
|
|
static int
|
|
bridge_ioctl_stxhc(struct bridge_softc *sc, void *arg)
|
|
{
|
|
struct ifbrparam *param = arg;
|
|
|
|
return (bstp_set_holdcount(&sc->sc_stp, param->ifbrp_txhc));
|
|
}
|
|
|
|
/*
|
|
* bridge_ifdetach:
|
|
*
|
|
* Detach an interface from a bridge. Called when a member
|
|
* interface is detaching.
|
|
*/
|
|
static void
|
|
bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_bridge;
|
|
struct bridge_iflist *bif;
|
|
|
|
if (ifp->if_flags & IFF_RENAMING)
|
|
return;
|
|
|
|
/* Check if the interface is a bridge member */
|
|
if (sc != NULL) {
|
|
BRIDGE_LOCK(sc);
|
|
|
|
bif = bridge_lookup_member_if(sc, ifp);
|
|
if (bif != NULL)
|
|
bridge_delete_member(sc, bif, 1);
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
return;
|
|
}
|
|
|
|
/* Check if the interface is a span port */
|
|
BRIDGE_LIST_LOCK();
|
|
LIST_FOREACH(sc, &V_bridge_list, sc_list) {
|
|
BRIDGE_LOCK(sc);
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
|
|
if (ifp == bif->bif_ifp) {
|
|
bridge_delete_span(sc, bif);
|
|
break;
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
}
|
|
BRIDGE_LIST_UNLOCK();
|
|
}
|
|
|
|
/*
|
|
* 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_drv_flags & IFF_DRV_RUNNING)
|
|
return;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
|
|
bridge_timer, sc);
|
|
|
|
ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
|
bstp_init(&sc->sc_stp); /* Initialize Spanning Tree */
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
}
|
|
|
|
/*
|
|
* bridge_stop:
|
|
*
|
|
* Stop the bridge interface.
|
|
*/
|
|
static void
|
|
bridge_stop(struct ifnet *ifp, int disable)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_softc;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
return;
|
|
|
|
callout_stop(&sc->sc_brcallout);
|
|
bstp_stop(&sc->sc_stp);
|
|
|
|
bridge_rtflush(sc, IFBF_FLUSHDYN);
|
|
|
|
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
|
|
}
|
|
|
|
/*
|
|
* bridge_enqueue:
|
|
*
|
|
* Enqueue a packet on a bridge member interface.
|
|
*
|
|
*/
|
|
static int
|
|
bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
|
|
{
|
|
int len, err = 0;
|
|
short mflags;
|
|
struct mbuf *m0;
|
|
|
|
/* We may be sending a fragment so traverse the mbuf */
|
|
for (; m; m = m0) {
|
|
m0 = m->m_nextpkt;
|
|
m->m_nextpkt = NULL;
|
|
len = m->m_pkthdr.len;
|
|
mflags = m->m_flags;
|
|
|
|
/*
|
|
* If underlying interface can not do VLAN tag insertion itself
|
|
* then attach a packet tag that holds it.
|
|
*/
|
|
if ((m->m_flags & M_VLANTAG) &&
|
|
(dst_ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0) {
|
|
m = ether_vlanencap(m, m->m_pkthdr.ether_vtag);
|
|
if (m == NULL) {
|
|
if_printf(dst_ifp,
|
|
"unable to prepend VLAN header\n");
|
|
if_inc_counter(dst_ifp, IFCOUNTER_OERRORS, 1);
|
|
continue;
|
|
}
|
|
m->m_flags &= ~M_VLANTAG;
|
|
}
|
|
|
|
if ((err = dst_ifp->if_transmit(dst_ifp, m))) {
|
|
m_freem(m0);
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
|
|
break;
|
|
}
|
|
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OPACKETS, 1);
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OBYTES, len);
|
|
if (mflags & M_MCAST)
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OMCASTS, 1);
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* bridge_dummynet:
|
|
*
|
|
* Receive a queued packet from dummynet and pass it on to the output
|
|
* interface.
|
|
*
|
|
* The mbuf has the Ethernet header already attached.
|
|
*/
|
|
static 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 (PFIL_HOOKED(&V_inet_pfil_hook)
|
|
#ifdef INET6
|
|
|| PFIL_HOOKED(&V_inet6_pfil_hook)
|
|
#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.
|
|
*/
|
|
static 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;
|
|
uint16_t vlan;
|
|
|
|
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;
|
|
vlan = VLANTAGOF(m);
|
|
|
|
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_drv_flags & IFF_DRV_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, vlan);
|
|
if (dst_if == NULL) {
|
|
struct bridge_iflist *bif;
|
|
struct mbuf *mc;
|
|
int error = 0, used = 0;
|
|
|
|
bridge_span(sc, m);
|
|
|
|
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_type == IFT_GIF)
|
|
continue;
|
|
if ((dst_if->if_drv_flags & IFF_DRV_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) &&
|
|
bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
|
|
continue;
|
|
|
|
if (LIST_NEXT(bif, bif_next) == NULL) {
|
|
used = 1;
|
|
mc = m;
|
|
} else {
|
|
mc = m_copypacket(m, M_NOWAIT);
|
|
if (mc == NULL) {
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, mc);
|
|
}
|
|
if (used == 0)
|
|
m_freem(m);
|
|
BRIDGE_UNREF(sc);
|
|
return (0);
|
|
}
|
|
|
|
sendunicast:
|
|
/*
|
|
* XXX Spanning tree consideration here?
|
|
*/
|
|
|
|
bridge_span(sc, m);
|
|
if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0) {
|
|
m_freem(m);
|
|
BRIDGE_UNLOCK(sc);
|
|
return (0);
|
|
}
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
bridge_enqueue(sc, dst_if, m);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* bridge_transmit:
|
|
*
|
|
* Do output on a bridge.
|
|
*
|
|
*/
|
|
static int
|
|
bridge_transmit(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct bridge_softc *sc;
|
|
struct ether_header *eh;
|
|
struct ifnet *dst_if;
|
|
int error = 0;
|
|
|
|
sc = ifp->if_softc;
|
|
|
|
ETHER_BPF_MTAP(ifp, m);
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
|
|
BRIDGE_LOCK(sc);
|
|
if (((m->m_flags & (M_BCAST|M_MCAST)) == 0) &&
|
|
(dst_if = bridge_rtlookup(sc, eh->ether_dhost, 1)) != NULL) {
|
|
BRIDGE_UNLOCK(sc);
|
|
error = bridge_enqueue(sc, dst_if, m);
|
|
} else
|
|
bridge_broadcast(sc, ifp, m, 0);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* The ifp->if_qflush entry point for if_bridge(4) is no-op.
|
|
*/
|
|
static void
|
|
bridge_qflush(struct ifnet *ifp __unused)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* bridge_forward:
|
|
*
|
|
* The forwarding function of the bridge.
|
|
*
|
|
* NOTE: Releases the lock on return.
|
|
*/
|
|
static void
|
|
bridge_forward(struct bridge_softc *sc, struct bridge_iflist *sbif,
|
|
struct mbuf *m)
|
|
{
|
|
struct bridge_iflist *dbif;
|
|
struct ifnet *src_if, *dst_if, *ifp;
|
|
struct ether_header *eh;
|
|
uint16_t vlan;
|
|
uint8_t *dst;
|
|
int error;
|
|
|
|
src_if = m->m_pkthdr.rcvif;
|
|
ifp = sc->sc_ifp;
|
|
|
|
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
|
|
if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
|
|
vlan = VLANTAGOF(m);
|
|
|
|
if ((sbif->bif_flags & IFBIF_STP) &&
|
|
sbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
|
|
goto drop;
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
dst = eh->ether_dhost;
|
|
|
|
/* If the interface is learning, record the address. */
|
|
if (sbif->bif_flags & IFBIF_LEARNING) {
|
|
error = bridge_rtupdate(sc, eh->ether_shost, vlan,
|
|
sbif, 0, IFBAF_DYNAMIC);
|
|
/*
|
|
* If the interface has addresses limits then deny any source
|
|
* that is not in the cache.
|
|
*/
|
|
if (error && sbif->bif_addrmax)
|
|
goto drop;
|
|
}
|
|
|
|
if ((sbif->bif_flags & IFBIF_STP) != 0 &&
|
|
sbif->bif_stp.bp_state == BSTP_IFSTATE_LEARNING)
|
|
goto drop;
|
|
|
|
/*
|
|
* 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, dst, vlan);
|
|
if (src_if == dst_if)
|
|
goto drop;
|
|
} else {
|
|
/*
|
|
* Check if its a reserved multicast address, any address
|
|
* listed in 802.1D section 7.12.6 may not be forwarded by the
|
|
* bridge.
|
|
* This is currently 01-80-C2-00-00-00 to 01-80-C2-00-00-0F
|
|
*/
|
|
if (dst[0] == 0x01 && dst[1] == 0x80 &&
|
|
dst[2] == 0xc2 && dst[3] == 0x00 &&
|
|
dst[4] == 0x00 && dst[5] <= 0x0f)
|
|
goto drop;
|
|
|
|
/* ...forward it to all interfaces. */
|
|
if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1);
|
|
dst_if = NULL;
|
|
}
|
|
|
|
/*
|
|
* If we have a destination interface which is a member of our bridge,
|
|
* OR this is a unicast packet, push it through the bpf(4) machinery.
|
|
* For broadcast or multicast packets, don't bother because it will
|
|
* be reinjected into ether_input. We do this before we pass the packets
|
|
* through the pfil(9) framework, as it is possible that pfil(9) will
|
|
* drop the packet, or possibly modify it, making it difficult to debug
|
|
* firewall issues on the bridge.
|
|
*/
|
|
if (dst_if != NULL || (m->m_flags & (M_BCAST | M_MCAST)) == 0)
|
|
ETHER_BPF_MTAP(ifp, m);
|
|
|
|
/* run the packet filter */
|
|
if (PFIL_HOOKED(&V_inet_pfil_hook)
|
|
#ifdef INET6
|
|
|| PFIL_HOOKED(&V_inet6_pfil_hook)
|
|
#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) {
|
|
bridge_broadcast(sc, src_if, m, 1);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* At this point, we're dealing with a unicast frame
|
|
* going to a different interface.
|
|
*/
|
|
if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
goto drop;
|
|
|
|
dbif = bridge_lookup_member_if(sc, dst_if);
|
|
if (dbif == NULL)
|
|
/* Not a member of the bridge (anymore?) */
|
|
goto drop;
|
|
|
|
/* Private segments can not talk to each other */
|
|
if (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE)
|
|
goto drop;
|
|
|
|
if ((dbif->bif_flags & IFBIF_STP) &&
|
|
dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
|
|
goto drop;
|
|
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
if (PFIL_HOOKED(&V_inet_pfil_hook)
|
|
#ifdef INET6
|
|
|| PFIL_HOOKED(&V_inet6_pfil_hook)
|
|
#endif
|
|
) {
|
|
if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
|
|
return;
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, m);
|
|
return;
|
|
|
|
drop:
|
|
BRIDGE_UNLOCK(sc);
|
|
m_freem(m);
|
|
}
|
|
|
|
/*
|
|
* bridge_input:
|
|
*
|
|
* Receive input from a member interface. Queue the packet for
|
|
* bridging if it is not for us.
|
|
*/
|
|
static struct mbuf *
|
|
bridge_input(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_bridge;
|
|
struct bridge_iflist *bif, *bif2;
|
|
struct ifnet *bifp;
|
|
struct ether_header *eh;
|
|
struct mbuf *mc, *mc2;
|
|
uint16_t vlan;
|
|
int error;
|
|
|
|
if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
return (m);
|
|
|
|
bifp = sc->sc_ifp;
|
|
vlan = VLANTAGOF(m);
|
|
|
|
/*
|
|
* Implement support for bridge monitoring. If this flag has been
|
|
* set on this interface, discard the packet once we push it through
|
|
* the bpf(4) machinery, but before we do, increment the byte and
|
|
* packet counters associated with this interface.
|
|
*/
|
|
if ((bifp->if_flags & IFF_MONITOR) != 0) {
|
|
m->m_pkthdr.rcvif = bifp;
|
|
ETHER_BPF_MTAP(bifp, m);
|
|
if_inc_counter(bifp, IFCOUNTER_IPACKETS, 1);
|
|
if_inc_counter(bifp, IFCOUNTER_IBYTES, m->m_pkthdr.len);
|
|
m_freem(m);
|
|
return (NULL);
|
|
}
|
|
BRIDGE_LOCK(sc);
|
|
bif = bridge_lookup_member_if(sc, ifp);
|
|
if (bif == NULL) {
|
|
BRIDGE_UNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
eh = mtod(m, struct ether_header *);
|
|
|
|
bridge_span(sc, 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) {
|
|
bstp_input(&bif->bif_stp, ifp, m); /* consumes mbuf */
|
|
BRIDGE_UNLOCK(sc);
|
|
return (NULL);
|
|
}
|
|
|
|
if ((bif->bif_flags & IFBIF_STP) &&
|
|
bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
|
|
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_NOWAIT);
|
|
if (mc == NULL) {
|
|
BRIDGE_UNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
/* Perform the bridge forwarding function with the copy. */
|
|
bridge_forward(sc, bif, mc);
|
|
|
|
/*
|
|
* Reinject the mbuf as arriving on the bridge so we have a
|
|
* chance at claiming multicast packets. We can not loop back
|
|
* here from ether_input as a bridge is never a member of a
|
|
* bridge.
|
|
*/
|
|
KASSERT(bifp->if_bridge == NULL,
|
|
("loop created in bridge_input"));
|
|
mc2 = m_dup(m, M_NOWAIT);
|
|
if (mc2 != NULL) {
|
|
/* Keep the layer3 header aligned */
|
|
int i = min(mc2->m_pkthdr.len, max_protohdr);
|
|
mc2 = m_copyup(mc2, i, ETHER_ALIGN);
|
|
}
|
|
if (mc2 != NULL) {
|
|
mc2->m_pkthdr.rcvif = bifp;
|
|
(*bifp->if_input)(bifp, mc2);
|
|
}
|
|
|
|
/* Return the original packet for local processing. */
|
|
return (m);
|
|
}
|
|
|
|
if ((bif->bif_flags & IFBIF_STP) &&
|
|
bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
|
|
BRIDGE_UNLOCK(sc);
|
|
return (m);
|
|
}
|
|
|
|
#if (defined(INET) || defined(INET6))
|
|
# define OR_CARP_CHECK_WE_ARE_DST(iface) \
|
|
|| ((iface)->if_carp \
|
|
&& (*carp_forus_p)((iface), eh->ether_dhost))
|
|
# define OR_CARP_CHECK_WE_ARE_SRC(iface) \
|
|
|| ((iface)->if_carp \
|
|
&& (*carp_forus_p)((iface), eh->ether_shost))
|
|
#else
|
|
# define OR_CARP_CHECK_WE_ARE_DST(iface)
|
|
# define OR_CARP_CHECK_WE_ARE_SRC(iface)
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
# define OR_PFIL_HOOKED_INET6 \
|
|
|| PFIL_HOOKED(&V_inet6_pfil_hook)
|
|
#else
|
|
# define OR_PFIL_HOOKED_INET6
|
|
#endif
|
|
|
|
#define GRAB_OUR_PACKETS(iface) \
|
|
if ((iface)->if_type == IFT_GIF) \
|
|
continue; \
|
|
/* It is destined for us. */ \
|
|
if (memcmp(IF_LLADDR((iface)), eh->ether_dhost, ETHER_ADDR_LEN) == 0 \
|
|
OR_CARP_CHECK_WE_ARE_DST((iface)) \
|
|
) { \
|
|
if ((iface)->if_type == IFT_BRIDGE) { \
|
|
ETHER_BPF_MTAP(iface, m); \
|
|
if_inc_counter(iface, IFCOUNTER_IPACKETS, 1); \
|
|
if_inc_counter(iface, IFCOUNTER_IBYTES, m->m_pkthdr.len); \
|
|
/* Filter on the physical interface. */ \
|
|
if (V_pfil_local_phys && \
|
|
(PFIL_HOOKED(&V_inet_pfil_hook) \
|
|
OR_PFIL_HOOKED_INET6)) { \
|
|
if (bridge_pfil(&m, NULL, ifp, \
|
|
PFIL_IN) != 0 || m == NULL) { \
|
|
BRIDGE_UNLOCK(sc); \
|
|
return (NULL); \
|
|
} \
|
|
eh = mtod(m, struct ether_header *); \
|
|
} \
|
|
} \
|
|
if (bif->bif_flags & IFBIF_LEARNING) { \
|
|
error = bridge_rtupdate(sc, eh->ether_shost, \
|
|
vlan, bif, 0, IFBAF_DYNAMIC); \
|
|
if (error && bif->bif_addrmax) { \
|
|
BRIDGE_UNLOCK(sc); \
|
|
m_freem(m); \
|
|
return (NULL); \
|
|
} \
|
|
} \
|
|
m->m_pkthdr.rcvif = iface; \
|
|
BRIDGE_UNLOCK(sc); \
|
|
return (m); \
|
|
} \
|
|
\
|
|
/* We just received a packet that we sent out. */ \
|
|
if (memcmp(IF_LLADDR((iface)), eh->ether_shost, ETHER_ADDR_LEN) == 0 \
|
|
OR_CARP_CHECK_WE_ARE_SRC((iface)) \
|
|
) { \
|
|
BRIDGE_UNLOCK(sc); \
|
|
m_freem(m); \
|
|
return (NULL); \
|
|
}
|
|
|
|
/*
|
|
* Unicast. Make sure it's not for the bridge.
|
|
*/
|
|
do { GRAB_OUR_PACKETS(bifp) } while (0);
|
|
|
|
/*
|
|
* Give a chance for ifp at first priority. This will help when the
|
|
* packet comes through the interface like VLAN's with the same MACs
|
|
* on several interfaces from the same bridge. This also will save
|
|
* some CPU cycles in case the destination interface and the input
|
|
* interface (eq ifp) are the same.
|
|
*/
|
|
do { GRAB_OUR_PACKETS(ifp) } while (0);
|
|
|
|
/* Now check the all bridge members. */
|
|
LIST_FOREACH(bif2, &sc->sc_iflist, bif_next) {
|
|
GRAB_OUR_PACKETS(bif2->bif_ifp)
|
|
}
|
|
|
|
#undef OR_CARP_CHECK_WE_ARE_DST
|
|
#undef OR_CARP_CHECK_WE_ARE_SRC
|
|
#undef OR_PFIL_HOOKED_INET6
|
|
#undef GRAB_OUR_PACKETS
|
|
|
|
/* Perform the bridge forwarding function. */
|
|
bridge_forward(sc, bif, 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.
|
|
*/
|
|
static void
|
|
bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
|
|
struct mbuf *m, int runfilt)
|
|
{
|
|
struct bridge_iflist *dbif, *sbif;
|
|
struct mbuf *mc;
|
|
struct ifnet *dst_if;
|
|
int error = 0, used = 0, i;
|
|
|
|
sbif = bridge_lookup_member_if(sc, src_if);
|
|
|
|
BRIDGE_LOCK2REF(sc, error);
|
|
if (error) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
/* Filter on the bridge interface before broadcasting */
|
|
if (runfilt && (PFIL_HOOKED(&V_inet_pfil_hook)
|
|
#ifdef INET6
|
|
|| PFIL_HOOKED(&V_inet6_pfil_hook)
|
|
#endif
|
|
)) {
|
|
if (bridge_pfil(&m, sc->sc_ifp, NULL, PFIL_OUT) != 0)
|
|
goto out;
|
|
if (m == NULL)
|
|
goto out;
|
|
}
|
|
|
|
LIST_FOREACH(dbif, &sc->sc_iflist, bif_next) {
|
|
dst_if = dbif->bif_ifp;
|
|
if (dst_if == src_if)
|
|
continue;
|
|
|
|
/* Private segments can not talk to each other */
|
|
if (sbif && (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE))
|
|
continue;
|
|
|
|
if ((dbif->bif_flags & IFBIF_STP) &&
|
|
dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
|
|
continue;
|
|
|
|
if ((dbif->bif_flags & IFBIF_DISCOVER) == 0 &&
|
|
(m->m_flags & (M_BCAST|M_MCAST)) == 0)
|
|
continue;
|
|
|
|
if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
continue;
|
|
|
|
if (LIST_NEXT(dbif, bif_next) == NULL) {
|
|
mc = m;
|
|
used = 1;
|
|
} else {
|
|
mc = m_dup(m, M_NOWAIT);
|
|
if (mc == NULL) {
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
|
|
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 (runfilt && (PFIL_HOOKED(&V_inet_pfil_hook)
|
|
#ifdef INET6
|
|
|| PFIL_HOOKED(&V_inet6_pfil_hook)
|
|
#endif
|
|
)) {
|
|
if (used == 0) {
|
|
/* Keep the layer3 header aligned */
|
|
i = min(mc->m_pkthdr.len, max_protohdr);
|
|
mc = m_copyup(mc, i, ETHER_ALIGN);
|
|
if (mc == NULL) {
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
|
|
continue;
|
|
}
|
|
}
|
|
if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
|
|
continue;
|
|
if (mc == NULL)
|
|
continue;
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, mc);
|
|
}
|
|
if (used == 0)
|
|
m_freem(m);
|
|
|
|
out:
|
|
BRIDGE_UNREF(sc);
|
|
}
|
|
|
|
/*
|
|
* bridge_span:
|
|
*
|
|
* Duplicate a packet out one or more interfaces that are in span mode,
|
|
* the original mbuf is unmodified.
|
|
*/
|
|
static void
|
|
bridge_span(struct bridge_softc *sc, struct mbuf *m)
|
|
{
|
|
struct bridge_iflist *bif;
|
|
struct ifnet *dst_if;
|
|
struct mbuf *mc;
|
|
|
|
if (LIST_EMPTY(&sc->sc_spanlist))
|
|
return;
|
|
|
|
LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
|
|
dst_if = bif->bif_ifp;
|
|
|
|
if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
|
|
continue;
|
|
|
|
mc = m_copypacket(m, M_NOWAIT);
|
|
if (mc == NULL) {
|
|
if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
|
|
continue;
|
|
}
|
|
|
|
bridge_enqueue(sc, dst_if, mc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* bridge_rtupdate:
|
|
*
|
|
* Add a bridge routing entry.
|
|
*/
|
|
static int
|
|
bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst, uint16_t vlan,
|
|
struct bridge_iflist *bif, int setflags, uint8_t flags)
|
|
{
|
|
struct bridge_rtnode *brt;
|
|
int error;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
/* Check the source address is valid and not multicast. */
|
|
if (ETHER_IS_MULTICAST(dst) ||
|
|
(dst[0] == 0 && dst[1] == 0 && dst[2] == 0 &&
|
|
dst[3] == 0 && dst[4] == 0 && dst[5] == 0) != 0)
|
|
return (EINVAL);
|
|
|
|
/* 802.1p frames map to vlan 1 */
|
|
if (vlan == 0)
|
|
vlan = 1;
|
|
|
|
/*
|
|
* A route for this destination might already exist. If so,
|
|
* update it, otherwise create a new one.
|
|
*/
|
|
if ((brt = bridge_rtnode_lookup(sc, dst, vlan)) == NULL) {
|
|
if (sc->sc_brtcnt >= sc->sc_brtmax) {
|
|
sc->sc_brtexceeded++;
|
|
return (ENOSPC);
|
|
}
|
|
/* Check per interface address limits (if enabled) */
|
|
if (bif->bif_addrmax && bif->bif_addrcnt >= bif->bif_addrmax) {
|
|
bif->bif_addrexceeded++;
|
|
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);
|
|
|
|
if (bif->bif_flags & IFBIF_STICKY)
|
|
brt->brt_flags = IFBAF_STICKY;
|
|
else
|
|
brt->brt_flags = IFBAF_DYNAMIC;
|
|
|
|
memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
|
|
brt->brt_vlan = vlan;
|
|
|
|
if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
|
|
uma_zfree(bridge_rtnode_zone, brt);
|
|
return (error);
|
|
}
|
|
brt->brt_dst = bif;
|
|
bif->bif_addrcnt++;
|
|
}
|
|
|
|
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
|
|
brt->brt_dst != bif) {
|
|
brt->brt_dst->bif_addrcnt--;
|
|
brt->brt_dst = bif;
|
|
brt->brt_dst->bif_addrcnt++;
|
|
}
|
|
|
|
if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
|
|
brt->brt_expire = time_uptime + sc->sc_brttimeout;
|
|
if (setflags)
|
|
brt->brt_flags = flags;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* bridge_rtlookup:
|
|
*
|
|
* Lookup the destination interface for an address.
|
|
*/
|
|
static struct ifnet *
|
|
bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
|
|
{
|
|
struct bridge_rtnode *brt;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
if ((brt = bridge_rtnode_lookup(sc, addr, vlan)) == 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.
|
|
*/
|
|
static 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;
|
|
|
|
LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
|
|
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.
|
|
*/
|
|
static void
|
|
bridge_timer(void *arg)
|
|
{
|
|
struct bridge_softc *sc = arg;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
bridge_rtage(sc);
|
|
|
|
if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
|
|
callout_reset(&sc->sc_brcallout,
|
|
bridge_rtable_prune_period * hz, bridge_timer, sc);
|
|
}
|
|
|
|
/*
|
|
* bridge_rtage:
|
|
*
|
|
* Perform an aging cycle.
|
|
*/
|
|
static void
|
|
bridge_rtage(struct bridge_softc *sc)
|
|
{
|
|
struct bridge_rtnode *brt, *nbrt;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
|
|
if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
|
|
if (time_uptime >= brt->brt_expire)
|
|
bridge_rtnode_destroy(sc, brt);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* bridge_rtflush:
|
|
*
|
|
* Remove all dynamic addresses from the bridge.
|
|
*/
|
|
static void
|
|
bridge_rtflush(struct bridge_softc *sc, int full)
|
|
{
|
|
struct bridge_rtnode *brt, *nbrt;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
|
|
if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
|
|
bridge_rtnode_destroy(sc, brt);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* bridge_rtdaddr:
|
|
*
|
|
* Remove an address from the table.
|
|
*/
|
|
static int
|
|
bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
|
|
{
|
|
struct bridge_rtnode *brt;
|
|
int found = 0;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
/*
|
|
* If vlan is zero then we want to delete for all vlans so the lookup
|
|
* may return more than one.
|
|
*/
|
|
while ((brt = bridge_rtnode_lookup(sc, addr, vlan)) != NULL) {
|
|
bridge_rtnode_destroy(sc, brt);
|
|
found = 1;
|
|
}
|
|
|
|
return (found ? 0 : ENOENT);
|
|
}
|
|
|
|
/*
|
|
* bridge_rtdelete:
|
|
*
|
|
* Delete routes to a speicifc member interface.
|
|
*/
|
|
static void
|
|
bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
|
|
{
|
|
struct bridge_rtnode *brt, *nbrt;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
|
|
LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
|
|
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.
|
|
*/
|
|
static void
|
|
bridge_rtable_init(struct bridge_softc *sc)
|
|
{
|
|
int i;
|
|
|
|
sc->sc_rthash = malloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
|
|
M_DEVBUF, M_WAITOK);
|
|
|
|
for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
|
|
LIST_INIT(&sc->sc_rthash[i]);
|
|
|
|
sc->sc_rthash_key = arc4random();
|
|
LIST_INIT(&sc->sc_rtlist);
|
|
}
|
|
|
|
/*
|
|
* bridge_rtable_fini:
|
|
*
|
|
* Deconstruct the route table for this bridge.
|
|
*/
|
|
static void
|
|
bridge_rtable_fini(struct bridge_softc *sc)
|
|
{
|
|
|
|
KASSERT(sc->sc_brtcnt == 0,
|
|
("%s: %d bridge routes referenced", __func__, sc->sc_brtcnt));
|
|
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
|
|
|
|
static int
|
|
bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
|
|
{
|
|
int i, d;
|
|
|
|
for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
|
|
d = ((int)a[i]) - ((int)b[i]);
|
|
}
|
|
|
|
return (d);
|
|
}
|
|
|
|
/*
|
|
* bridge_rtnode_lookup:
|
|
*
|
|
* Look up a bridge route node for the specified destination. Compare the
|
|
* vlan id or if zero then just return the first match.
|
|
*/
|
|
static struct bridge_rtnode *
|
|
bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
|
|
{
|
|
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 = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
|
|
if (dir == 0 && (brt->brt_vlan == vlan || vlan == 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.
|
|
*/
|
|
static 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 = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
|
|
if (dir == 0 && brt->brt_vlan == lbrt->brt_vlan)
|
|
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.
|
|
*/
|
|
static 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--;
|
|
brt->brt_dst->bif_addrcnt--;
|
|
uma_zfree(bridge_rtnode_zone, brt);
|
|
}
|
|
|
|
/*
|
|
* bridge_rtable_expire:
|
|
*
|
|
* Set the expiry time for all routes on an interface.
|
|
*/
|
|
static void
|
|
bridge_rtable_expire(struct ifnet *ifp, int age)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_bridge;
|
|
struct bridge_rtnode *brt;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
|
|
/*
|
|
* If the age is zero then flush, otherwise set all the expiry times to
|
|
* age for the interface
|
|
*/
|
|
if (age == 0)
|
|
bridge_rtdelete(sc, ifp, IFBF_FLUSHDYN);
|
|
else {
|
|
LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
|
|
/* Cap the expiry time to 'age' */
|
|
if (brt->brt_ifp == ifp &&
|
|
brt->brt_expire > time_uptime + age &&
|
|
(brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
|
|
brt->brt_expire = time_uptime + age;
|
|
}
|
|
}
|
|
BRIDGE_UNLOCK(sc);
|
|
}
|
|
|
|
/*
|
|
* bridge_state_change:
|
|
*
|
|
* Callback from the bridgestp code when a port changes states.
|
|
*/
|
|
static void
|
|
bridge_state_change(struct ifnet *ifp, int state)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_bridge;
|
|
static const char *stpstates[] = {
|
|
"disabled",
|
|
"listening",
|
|
"learning",
|
|
"forwarding",
|
|
"blocking",
|
|
"discarding"
|
|
};
|
|
|
|
if (V_log_stp)
|
|
log(LOG_NOTICE, "%s: state changed to %s on %s\n",
|
|
sc->sc_ifp->if_xname, stpstates[state], ifp->if_xname);
|
|
}
|
|
|
|
/*
|
|
* 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, hlen;
|
|
struct ether_header *eh1, eh2;
|
|
struct ip *ip;
|
|
struct llc llc1;
|
|
u_int16_t ether_type;
|
|
|
|
snap = 0;
|
|
error = -1; /* Default error if not error == 0 */
|
|
|
|
#if 0
|
|
/* we may return with the IP fields swapped, ensure its not shared */
|
|
KASSERT(M_WRITABLE(*mp), ("%s: modifying a shared mbuf", __func__));
|
|
#endif
|
|
|
|
if (V_pfil_bridge == 0 && V_pfil_member == 0 && V_pfil_ipfw == 0)
|
|
return (0); /* filtering is disabled */
|
|
|
|
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:
|
|
if (V_pfil_ipfw_arp == 0)
|
|
return (0); /* Automatically pass */
|
|
break;
|
|
|
|
case ETHERTYPE_IP:
|
|
#ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
#endif /* INET6 */
|
|
break;
|
|
default:
|
|
/*
|
|
* Check to see if the user wants to pass non-ip
|
|
* packets, these will not be checked by pfil(9) and
|
|
* passed unconditionally so the default is to drop.
|
|
*/
|
|
if (V_pfil_onlyip)
|
|
goto bad;
|
|
}
|
|
|
|
/* Run the packet through pfil before stripping link headers */
|
|
if (PFIL_HOOKED(&V_link_pfil_hook) && V_pfil_ipfw != 0 &&
|
|
dir == PFIL_OUT && ifp != NULL) {
|
|
|
|
error = pfil_run_hooks(&V_link_pfil_hook, mp, ifp, dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* packet consumed by filter */
|
|
return (error);
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
error = 0;
|
|
|
|
/*
|
|
* Run the packet through pfil
|
|
*/
|
|
switch (ether_type) {
|
|
case ETHERTYPE_IP:
|
|
/*
|
|
* 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 (V_pfil_bridge && dir == PFIL_OUT && bifp != NULL)
|
|
error = pfil_run_hooks(&V_inet_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (V_pfil_member && ifp != NULL)
|
|
error = pfil_run_hooks(&V_inet_pfil_hook, mp, ifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (V_pfil_bridge && dir == PFIL_IN && bifp != NULL)
|
|
error = pfil_run_hooks(&V_inet_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
/* check if we need to fragment the packet */
|
|
if (V_pfil_member && ifp != NULL && dir == PFIL_OUT) {
|
|
i = (*mp)->m_pkthdr.len;
|
|
if (i > ifp->if_mtu) {
|
|
error = bridge_fragment(ifp, *mp, &eh2, snap,
|
|
&llc1);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
/* Recalculate the ip checksum. */
|
|
ip = mtod(*mp, struct ip *);
|
|
hlen = ip->ip_hl << 2;
|
|
if (hlen < sizeof(struct ip))
|
|
goto bad;
|
|
if (hlen > (*mp)->m_len) {
|
|
if ((*mp = m_pullup(*mp, hlen)) == 0)
|
|
goto bad;
|
|
ip = mtod(*mp, struct ip *);
|
|
if (ip == NULL)
|
|
goto bad;
|
|
}
|
|
ip->ip_sum = 0;
|
|
if (hlen == sizeof(struct ip))
|
|
ip->ip_sum = in_cksum_hdr(ip);
|
|
else
|
|
ip->ip_sum = in_cksum(*mp, hlen);
|
|
|
|
break;
|
|
#ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
if (V_pfil_bridge && dir == PFIL_OUT && bifp != NULL)
|
|
error = pfil_run_hooks(&V_inet6_pfil_hook, mp, bifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (V_pfil_member && ifp != NULL)
|
|
error = pfil_run_hooks(&V_inet6_pfil_hook, mp, ifp,
|
|
dir, NULL);
|
|
|
|
if (*mp == NULL || error != 0) /* filter may consume */
|
|
break;
|
|
|
|
if (V_pfil_bridge && dir == PFIL_IN && bifp != NULL)
|
|
error = pfil_run_hooks(&V_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_NOWAIT);
|
|
if (*mp == NULL)
|
|
return (error);
|
|
bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
|
|
}
|
|
|
|
M_PREPEND(*mp, ETHER_HDR_LEN, M_NOWAIT);
|
|
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 */
|
|
KMOD_IPSTAT_INC(ips_toosmall);
|
|
goto bad;
|
|
}
|
|
} else if (__predict_false(m->m_len < sizeof (struct ip))) {
|
|
if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
|
|
KMOD_IPSTAT_INC(ips_toosmall);
|
|
goto bad;
|
|
}
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
if (ip == NULL) goto bad;
|
|
|
|
if (ip->ip_v != IPVERSION) {
|
|
KMOD_IPSTAT_INC(ips_badvers);
|
|
goto bad;
|
|
}
|
|
hlen = ip->ip_hl << 2;
|
|
if (hlen < sizeof(struct ip)) { /* minimum header length */
|
|
KMOD_IPSTAT_INC(ips_badhlen);
|
|
goto bad;
|
|
}
|
|
if (hlen > m->m_len) {
|
|
if ((m = m_pullup(m, hlen)) == 0) {
|
|
KMOD_IPSTAT_INC(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) {
|
|
KMOD_IPSTAT_INC(ips_badsum);
|
|
goto bad;
|
|
}
|
|
|
|
/* Retrieve the packet length. */
|
|
len = ntohs(ip->ip_len);
|
|
|
|
/*
|
|
* Check for additional length bogosity
|
|
*/
|
|
if (len < hlen) {
|
|
KMOD_IPSTAT_INC(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) {
|
|
KMOD_IPSTAT_INC(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_INC(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_INC(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_INC(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 */
|
|
|
|
/*
|
|
* bridge_fragment:
|
|
*
|
|
* Return a fragmented mbuf chain.
|
|
*/
|
|
static int
|
|
bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
|
|
int snap, struct llc *llc)
|
|
{
|
|
struct mbuf *m0;
|
|
struct ip *ip;
|
|
int error = -1;
|
|
|
|
if (m->m_len < sizeof(struct ip) &&
|
|
(m = m_pullup(m, sizeof(struct ip))) == NULL)
|
|
goto out;
|
|
ip = mtod(m, struct ip *);
|
|
|
|
m->m_pkthdr.csum_flags |= CSUM_IP;
|
|
error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* walk the chain and re-add the Ethernet header */
|
|
for (m0 = m; m0; m0 = m0->m_nextpkt) {
|
|
if (error == 0) {
|
|
if (snap) {
|
|
M_PREPEND(m0, sizeof(struct llc), M_NOWAIT);
|
|
if (m0 == NULL) {
|
|
error = ENOBUFS;
|
|
continue;
|
|
}
|
|
bcopy(llc, mtod(m0, caddr_t),
|
|
sizeof(struct llc));
|
|
}
|
|
M_PREPEND(m0, ETHER_HDR_LEN, M_NOWAIT);
|
|
if (m0 == NULL) {
|
|
error = ENOBUFS;
|
|
continue;
|
|
}
|
|
bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
|
|
} else
|
|
m_freem(m);
|
|
}
|
|
|
|
if (error == 0)
|
|
KMOD_IPSTAT_INC(ips_fragmented);
|
|
|
|
return (error);
|
|
|
|
out:
|
|
if (m != NULL)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
bridge_linkstate(struct ifnet *ifp)
|
|
{
|
|
struct bridge_softc *sc = ifp->if_bridge;
|
|
struct bridge_iflist *bif;
|
|
|
|
BRIDGE_LOCK(sc);
|
|
bif = bridge_lookup_member_if(sc, ifp);
|
|
if (bif == NULL) {
|
|
BRIDGE_UNLOCK(sc);
|
|
return;
|
|
}
|
|
bridge_linkcheck(sc);
|
|
BRIDGE_UNLOCK(sc);
|
|
|
|
bstp_linkstate(&bif->bif_stp);
|
|
}
|
|
|
|
static void
|
|
bridge_linkcheck(struct bridge_softc *sc)
|
|
{
|
|
struct bridge_iflist *bif;
|
|
int new_link, hasls;
|
|
|
|
BRIDGE_LOCK_ASSERT(sc);
|
|
new_link = LINK_STATE_DOWN;
|
|
hasls = 0;
|
|
/* Our link is considered up if at least one of our ports is active */
|
|
LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
|
|
if (bif->bif_ifp->if_capabilities & IFCAP_LINKSTATE)
|
|
hasls++;
|
|
if (bif->bif_ifp->if_link_state == LINK_STATE_UP) {
|
|
new_link = LINK_STATE_UP;
|
|
break;
|
|
}
|
|
}
|
|
if (!LIST_EMPTY(&sc->sc_iflist) && !hasls) {
|
|
/* If no interfaces support link-state then we default to up */
|
|
new_link = LINK_STATE_UP;
|
|
}
|
|
if_link_state_change(sc->sc_ifp, new_link);
|
|
}
|