mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
150 lines
5.2 KiB
C
150 lines
5.2 KiB
C
/*
|
|
* Copyright (c) 1998-2000 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
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_EH(ifp) ((struct arpcom *)ifp)->ac_enaddr
|
|
|
|
#define BDG_SAMECLUSTER(ifp,src) \
|
|
(src == NULL || BDG_CLUSTER(ifp) == BDG_CLUSTER(src) )
|
|
|
|
/*
|
|
* BDG_ACTIVE(ifp) does all checks to see if bridging is loaded,
|
|
* activated and used on a given interface.
|
|
*/
|
|
#define BDG_ACTIVE(ifp) (do_bridge && BDG_LOADED && BDG_USED(ifp))
|
|
|
|
#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))
|
|
|
|
#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
|
|
/* for machines that do not support unaligned access */
|
|
#define BDG_MATCH(a,b) (!bcmp(a, b, ETHER_ADDR_LEN) )
|
|
#define IS_ETHER_BROADCAST(a) (!bcmp(a, "\377\377\377\377\377\377", 6))
|
|
#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[(long)type]++
|
|
|
|
#ifdef _KERNEL
|
|
typedef struct ifnet *bridge_in_t(struct ifnet *, struct ether_header *);
|
|
/* bdg_forward frees the mbuf if necessary, returning null */
|
|
typedef struct mbuf *bdg_forward_t(struct mbuf *, struct ether_header *const,
|
|
struct ifnet *);
|
|
typedef void bdgtakeifaces_t(void);
|
|
extern bridge_in_t *bridge_in_ptr;
|
|
extern bdg_forward_t *bdg_forward_ptr;
|
|
extern bdgtakeifaces_t *bdgtakeifaces_ptr;
|
|
|
|
#define BDG_LOADED (bdgtakeifaces_ptr != NULL)
|
|
#endif /* KERNEL */
|