/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1998 Luigi Rizzo * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #ifndef _NET_BRIDGE_H_ #define _NET_BRIDGE_H_ #include <sys/appleapiopts.h> #warning This is not used by Darwin, do not include extern int do_bridge; /* * the hash table for bridge */ typedef struct hash_table { struct ifnet *name ; unsigned char etheraddr[6] ; unsigned short used ; } bdg_hash_table ; extern bdg_hash_table *bdg_table ; /* * We need additional info for the bridge. The bdg_ifp2sc[] array * provides a pointer to this struct using the if_index. * bdg_softc has a backpointer to the struct ifnet, the bridge * flags, and a cluster (bridging occurs only between port of the * same cluster). */ struct bdg_softc { struct ifnet *ifp ; /* also ((struct arpcom *)ifp)->ac_enaddr is the eth. addr */ int flags ; #define IFF_BDG_PROMISC 0x0001 /* set promisc mode on this if. */ #define IFF_MUTE 0x0002 /* mute this if for bridging. */ #define IFF_USED 0x0004 /* use this if for bridging. */ short cluster_id ; /* in network format */ u_long magic; } ; extern struct bdg_softc *ifp2sc; #define BDG_USED(ifp) (ifp2sc[ifp->if_index].flags & IFF_USED) #define BDG_MUTED(ifp) (ifp2sc[ifp->if_index].flags & IFF_MUTE) #define BDG_MUTE(ifp) ifp2sc[ifp->if_index].flags |= IFF_MUTE #define BDG_UNMUTE(ifp) ifp2sc[ifp->if_index].flags &= ~IFF_MUTE #define BDG_CLUSTER(ifp) (ifp2sc[ifp->if_index].cluster_id) #define BDG_SAMECLUSTER(ifp,src) \ (src == NULL || BDG_CLUSTER(ifp) == BDG_CLUSTER(src) ) #define BDG_MAX_PORTS 128 typedef struct _bdg_addr { unsigned char etheraddr[6] ; short cluster_id ; } bdg_addr ; extern bdg_addr bdg_addresses[BDG_MAX_PORTS]; extern int bdg_ports ; /* * out of the 6 bytes, the last ones are more "variable". Since * we are on a little endian machine, we have to do some gimmick... */ #define HASH_SIZE 8192 /* must be a power of 2 */ #define HASH_FN(addr) ( \ ntohs( ((short *)addr)[1] ^ ((short *)addr)[2] ) & (HASH_SIZE -1)) #define IFF_MUTE IFF_LINK2 /* will need a separate flag... */ struct ifnet *bridge_in(struct ifnet *ifp, struct ether_header *eh); /* bdg_forward frees the mbuf if necessary, returning null */ struct mbuf *bdg_forward(struct mbuf *m0, struct ether_header *eh, struct ifnet *dst); #ifdef __i386__ #define BDG_MATCH(a,b) ( \ ((unsigned short *)(a))[2] == ((unsigned short *)(b))[2] && \ *((unsigned int *)(a)) == *((unsigned int *)(b)) ) #define IS_ETHER_BROADCAST(a) ( \ *((unsigned int *)(a)) == 0xffffffff && \ ((unsigned short *)(a))[2] == 0xffff ) #else #warning... must complete these for the alpha etc. #define BDG_MATCH(a,b) (!bcmp(a, b, ETHER_ADDR_LEN) ) #endif /* * The following constants are not legal ifnet pointers, and are used * as return values from the classifier, bridge_dst_lookup() * The same values are used as index in the statistics arrays, * with BDG_FORWARD replacing specifically forwarded packets. */ #define BDG_BCAST ( (struct ifnet *)1 ) #define BDG_MCAST ( (struct ifnet *)2 ) #define BDG_LOCAL ( (struct ifnet *)3 ) #define BDG_DROP ( (struct ifnet *)4 ) #define BDG_UNKNOWN ( (struct ifnet *)5 ) #define BDG_IN ( (struct ifnet *)7 ) #define BDG_OUT ( (struct ifnet *)8 ) #define BDG_FORWARD ( (struct ifnet *)9 ) #define PF_BDG 3 /* XXX superhack */ /* * statistics, passed up with sysctl interface and ns -p bdg */ #define STAT_MAX (int)BDG_FORWARD struct bdg_port_stat { char name[16]; u_long collisions; u_long p_in[STAT_MAX+1]; } ; struct bdg_stats { struct bdg_port_stat s[16]; } ; #define BDG_STAT(ifp, type) bdg_stats.s[ifp->if_index].p_in[(int)type]++ #ifdef KERNEL /* * Find the right pkt destination: * BDG_BCAST is a broadcast * BDG_MCAST is a multicast * BDG_LOCAL is for a local address * BDG_DROP must be dropped * other ifp of the dest. interface (incl.self) * * We assume this is only called for interfaces for which bridging * is enabled, i.e. BDG_USED(ifp) is true. */ static __inline struct ifnet * bridge_dst_lookup(struct ether_header *eh) { struct ifnet *dst ; int index ; bdg_addr *p ; if (IS_ETHER_BROADCAST(eh->ether_dhost)) return BDG_BCAST ; if (eh->ether_dhost[0] & 1) return BDG_MCAST ; /* * Lookup local addresses in case one matches. */ for (index = bdg_ports, p = bdg_addresses ; index ; index--, p++ ) if (BDG_MATCH(p->etheraddr, eh->ether_dhost) ) return BDG_LOCAL ; /* * Look for a possible destination in table */ index= HASH_FN( eh->ether_dhost ); dst = bdg_table[index].name; if ( dst && BDG_MATCH( bdg_table[index].etheraddr, eh->ether_dhost) ) return dst ; else return BDG_UNKNOWN ; } #endif /* KERNEL */ #endif /* _NET_BRIDGE_H_ */