| 1 | /* |
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| 2 | * Copyright (c) 1998-2002 Luigi Rizzo |
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| 3 | * |
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| 4 | * Work partly supported by: Cisco Systems, Inc. - NSITE lab, RTP, NC |
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| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * 1. Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * |
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| 15 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 25 | * SUCH DAMAGE. |
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| 26 | * |
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| 27 | * $FreeBSD: src/sys/net/bridge.h,v 1.11 2002/02/15 05:11:11 luigi Exp $ |
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| 28 | */ |
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| 29 | |
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| 30 | extern int do_bridge; |
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| 31 | |
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| 32 | /* |
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| 33 | * We need additional per-interface info for the bridge, which is |
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| 34 | * stored in a struct bdg_softc. The ifp2sc[] array provides a pointer |
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| 35 | * to this struct using the if_index as a mapping key. |
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| 36 | * bdg_softc has a backpointer to the struct ifnet, the bridge |
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| 37 | * flags, and a cluster (bridging occurs only between port of the |
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| 38 | * same cluster). |
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| 39 | */ |
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| 40 | |
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| 41 | struct cluster_softc; /* opaque here, defined in bridge.c */ |
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| 42 | |
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| 43 | struct bdg_softc { |
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| 44 | struct ifnet *ifp ; |
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| 45 | /* also ((struct arpcom *)ifp)->ac_enaddr is the eth. addr */ |
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| 46 | int flags ; |
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| 47 | #define IFF_BDG_PROMISC 0x0001 /* set promisc mode on this if. */ |
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| 48 | #define IFF_MUTE 0x0002 /* mute this if for bridging. */ |
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| 49 | #define IFF_USED 0x0004 /* use this if for bridging. */ |
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| 50 | struct cluster_softc *cluster; |
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| 51 | } ; |
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| 52 | |
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| 53 | extern struct bdg_softc *ifp2sc; |
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| 54 | |
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| 55 | #define BDG_USED(ifp) (ifp2sc[ifp->if_index].flags & IFF_USED) |
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| 56 | /* |
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| 57 | * BDG_ACTIVE(ifp) does all checks to see if bridging is enabled, loaded, |
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| 58 | * and used on a given interface. |
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| 59 | */ |
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| 60 | #define BDG_ACTIVE(ifp) (do_bridge && BDG_LOADED && BDG_USED(ifp)) |
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| 61 | |
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| 62 | /* |
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| 63 | * The following constants are not legal ifnet pointers, and are used |
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| 64 | * as return values from the classifier, bridge_dst_lookup(). |
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| 65 | * The same values are used as index in the statistics arrays, |
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| 66 | * with BDG_FORWARD replacing specifically forwarded packets. |
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| 67 | * |
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| 68 | * These constants are here because they are used in 'netstat' |
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| 69 | * to show bridge statistics. |
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| 70 | */ |
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| 71 | #define BDG_BCAST ( (struct ifnet *)1 ) |
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| 72 | #define BDG_MCAST ( (struct ifnet *)2 ) |
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| 73 | #define BDG_LOCAL ( (struct ifnet *)3 ) |
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| 74 | #define BDG_DROP ( (struct ifnet *)4 ) |
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| 75 | #define BDG_UNKNOWN ( (struct ifnet *)5 ) |
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| 76 | #define BDG_IN ( (struct ifnet *)7 ) |
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| 77 | #define BDG_OUT ( (struct ifnet *)8 ) |
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| 78 | #define BDG_FORWARD ( (struct ifnet *)9 ) |
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| 79 | |
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| 80 | /* |
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| 81 | * Statistics are passed up with the sysctl interface, "netstat -p bdg" |
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| 82 | * reads them. PF_BDG defines the 'bridge' protocol family. |
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| 83 | */ |
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| 84 | |
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| 85 | #define PF_BDG 3 /* XXX superhack */ |
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| 86 | |
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| 87 | #define STAT_MAX (int)BDG_FORWARD |
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| 88 | struct bdg_port_stat { |
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| 89 | char name[16]; |
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| 90 | u_long collisions; |
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| 91 | u_long p_in[STAT_MAX+1]; |
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| 92 | } ; |
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| 93 | |
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| 94 | /* XXX this should be made dynamic */ |
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| 95 | #define BDG_MAX_PORTS 128 |
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| 96 | struct bdg_stats { |
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| 97 | struct bdg_port_stat s[BDG_MAX_PORTS]; |
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| 98 | } ; |
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| 99 | |
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| 100 | |
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| 101 | #define BDG_STAT(ifp, type) bdg_stats.s[ifp->if_index].p_in[(uintptr_t)type]++ |
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| 102 | |
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| 103 | #ifdef _KERNEL |
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| 104 | typedef struct ifnet *bridge_in_t(struct ifnet *, struct ether_header *); |
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| 105 | /* bdg_forward frees the mbuf if necessary, returning null */ |
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| 106 | typedef struct mbuf *bdg_forward_t(struct mbuf *, struct ether_header *const, |
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| 107 | struct ifnet *); |
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| 108 | typedef void bdgtakeifaces_t(void); |
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| 109 | extern bridge_in_t *bridge_in_ptr; |
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| 110 | extern bdg_forward_t *bdg_forward_ptr; |
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| 111 | extern bdgtakeifaces_t *bdgtakeifaces_ptr; |
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| 112 | |
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| 113 | #define BDG_LOADED (bdgtakeifaces_ptr != NULL) |
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| 114 | #endif /* KERNEL */ |
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