sys/net/if_bridge.c

67  * Network interface bridge support.
73  *	  to bridge other types of interfaces (FDDI-FDDI, and maybe
205  * Software state for each bridge.
215 	struct callout		sc_brcallout;	/* bridge callout */
342 /* The default bridge vlan is 1 (IEEE 802.1Q-2003 Table 9-2) */
352 static SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
361 /* run pfil hooks on the bridge interface */
366     "Packet filter on the bridge interface");
400 /* share MAC with first bridge member */
405     "Inherit MAC address from the first bridge member");
412     "zones of a bridge interface and the member interfaces");
522 static const char bridge_name[] = "bridge";
589  * handler for net.link.bridge.ipfw
626  *	Create a new bridge instance.
667 	 * Since we are using random ethernet addresses for the bridge, it is
669 	 * this hardware address isn't already in use on another bridge.
718  *	Destroy a bridge instance.
944  *	Lookup a bridge member interface.
966  *	Lookup a bridge member interface by ifnet*.
1006 	 * If removing the interface that gave the bridge its mac address, set
1007 	 * the mac address of the bridge to the address of the next member, or
1028 	    ("%s: %d bridge routes referenced", __func__, bif->bif_addrcnt));
1175 	 * Assign the interface's MAC address to the bridge if it's the first
1176 	 * member and the MAC address of the bridge has not been changed from
1303 	/* Save the bits relating to the bridge */
1791  *	Detach an interface from a bridge.  Called when a member
1809 	/* Check if the interface is a bridge member */
1839  *	Initialize a bridge interface.
1863  *	Stop the bridge interface.
1886  *	Enqueue a packet on a bridge member interface.
1976  *	Send output from a bridge member interface.  This
2005 	 * If bridge is down, but the original output interface is up,
2092  *	Do output on a bridge.
2131  *	The forwarding function of the bridge.
2183 	 * "this" side of the bridge, drop it.
2193 		 * bridge.
2207 	 * If we have a destination interface which is a member of our bridge,
2213 	 * firewall issues on the bridge.
2246 		/* Not a member of the bridge (anymore?) */
2302 	 * Implement support for bridge monitoring. If this flag has been
2343 		 * for bridge processing; return the original packet for
2352 		/* Perform the bridge forwarding function with the copy. */
2356 		 * Reinject the mbuf as arriving on the bridge so we have a
2358 		 * here from ether_input as a bridge is never a member of a
2359 		 * bridge.
2450 	 * Unicast.  Make sure it's not for the bridge.
2457 	 * on several interfaces from the same bridge. This also will save
2463 	/* Now check the all bridge members. */
2473 	/* Perform the bridge forwarding function. */
2483  *	the bridge, except for the one on which the packet
2505 	/* Filter on the bridge interface before broadcasting */
2549 		 * Filter on the output interface. Pass a NULL bridge interface
2550 		 * pointer so we do not redundantly filter on the bridge for
2617  *	Add a bridge routing entry.
2654 		 * Allocate a new bridge forwarding node, and
2746  *	Aging timer for the bridge.
2785  *	Remove all dynamic addresses from the bridge.
2847  *	Initialize the route table for this bridge.
2867  *	Deconstruct the route table for this bridge.
2874 	    ("%s: %d bridge routes referenced", __func__, sc->sc_brtcnt));
2929  *	Look up a bridge route node for the specified destination. Compare the
2956  *	Insert the specified bridge node into the route table.  We
3005  *	Destroy a bridge rtnode.
3077  * Send bridge packets through pfil if they are one of the types pfil can deal
3130 	 * If we're trying to filter bridge traffic, don't look at anything
3132 	 * IPv6, don't allow IPv6 through the bridge either.  This is lame
3208 		 * Run pfil on the member interface and the bridge, both can