diff options
Diffstat (limited to 'newlib/libc/sys/linux/include/net/bridge.h')
| -rw-r--r-- | newlib/libc/sys/linux/include/net/bridge.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/include/net/bridge.h b/newlib/libc/sys/linux/include/net/bridge.h new file mode 100644 index 000000000..a90f2747b --- /dev/null +++ b/newlib/libc/sys/linux/include/net/bridge.h @@ -0,0 +1,114 @@ +/* + * Copyright (c) 1998-2002 Luigi Rizzo + * + * Work partly supported by: Cisco Systems, Inc. - NSITE lab, RTP, NC + * + * 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: src/sys/net/bridge.h,v 1.11 2002/02/15 05:11:11 luigi Exp $ + */ + +extern int do_bridge; + +/* + * We need additional per-interface info for the bridge, which is + * stored in a struct bdg_softc. The ifp2sc[] array provides a pointer + * to this struct using the if_index as a mapping key. + * 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 cluster_softc; /* opaque here, defined in bridge.c */ + +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. */ + struct cluster_softc *cluster; +} ; + +extern struct bdg_softc *ifp2sc; + +#define BDG_USED(ifp) (ifp2sc[ifp->if_index].flags & IFF_USED) +/* + * BDG_ACTIVE(ifp) does all checks to see if bridging is enabled, loaded, + * and used on a given interface. + */ +#define BDG_ACTIVE(ifp) (do_bridge && BDG_LOADED && BDG_USED(ifp)) + +/* + * 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. + * + * These constants are here because they are used in 'netstat' + * to show bridge statistics. + */ +#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 ) + +/* + * Statistics are passed up with the sysctl interface, "netstat -p bdg" + * reads them. PF_BDG defines the 'bridge' protocol family. + */ + +#define PF_BDG 3 /* XXX superhack */ + +#define STAT_MAX (int)BDG_FORWARD +struct bdg_port_stat { + char name[16]; + u_long collisions; + u_long p_in[STAT_MAX+1]; +} ; + +/* XXX this should be made dynamic */ +#define BDG_MAX_PORTS 128 +struct bdg_stats { + struct bdg_port_stat s[BDG_MAX_PORTS]; +} ; + + +#define BDG_STAT(ifp, type) bdg_stats.s[ifp->if_index].p_in[(uintptr_t)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 */ |