Add if_bridge, which provides more advanced Ethernet bridging and 802.1d
spanning tree support. Based on Jason Wright's bridge driver from OpenBSD, and modified by Jason R. Thorpe in NetBSD. Reviewed by: mlaier, bms, green Silence from: -net Approved by: mlaier (mentor) Obtained from: NetBSD
This commit is contained in:
Andrew Thompson
parent
181fc3c6ea
commit
31997bf223
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=146985
533
sbin/ifconfig/ifbridge.c
Normal file
533
sbin/ifconfig/ifbridge.c
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@ -0,0 +1,533 @@
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/*-
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/if_bridgevar.h>
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#include <net/route.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <errno.h>
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#include "ifconfig.h"
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static int
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get_val(const char *cp, u_long *valp)
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{
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char *endptr;
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u_long val;
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errno = 0;
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val = strtoul(cp, &endptr, 0);
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if (cp[0] == '\0' || endptr[0] != '\0' || errno == ERANGE)
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return (-1);
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*valp = val;
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return (0);
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}
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static int
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do_cmd(int sock, u_long op, void *arg, size_t argsize, int set)
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{
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struct ifdrv ifd;
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memset(&ifd, 0, sizeof(ifd));
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strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
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ifd.ifd_cmd = op;
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ifd.ifd_len = argsize;
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ifd.ifd_data = arg;
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return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd));
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}
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static void
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do_bridgeflag(int sock, const char *ifs, int flag, int set)
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{
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struct ifbreq req;
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strlcpy(req.ifbr_ifsname, ifs, sizeof(req.ifbr_ifsname));
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if (do_cmd(sock, BRDGGIFFLGS, &req, sizeof(req), 0) < 0)
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err(1, "unable to get bridge flags");
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if (set)
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req.ifbr_ifsflags |= flag;
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else
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req.ifbr_ifsflags &= ~flag;
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if (do_cmd(sock, BRDGSIFFLGS, &req, sizeof(req), 1) < 0)
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err(1, "unable to set bridge flags");
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}
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static void
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bridge_interfaces(int s, const char *prefix, int flags)
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{
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static const char *stpstates[] = {
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"disabled",
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"listening",
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"learning",
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"forwarding",
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"blocking",
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};
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struct ifbifconf bifc;
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struct ifbreq *req;
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char *inbuf = NULL, *ninbuf;
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int i, len = 8192;
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for (;;) {
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ninbuf = realloc(inbuf, len);
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if (ninbuf == NULL)
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err(1, "unable to allocate interface buffer");
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bifc.ifbic_len = len;
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bifc.ifbic_buf = inbuf = ninbuf;
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if (do_cmd(s, BRDGGIFS, &bifc, sizeof(bifc), 0) < 0)
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err(1, "unable to get interface list");
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if ((bifc.ifbic_len + sizeof(*req)) < len)
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break;
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len *= 2;
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}
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for (i = 0; i < bifc.ifbic_len / sizeof(*req); i++) {
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req = bifc.ifbic_req + i;
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printf("%s%s ", prefix, req->ifbr_ifsname);
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printb("flags", req->ifbr_ifsflags, IFBIFBITS);
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printf("\n");
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if (!flags) continue;
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printf("%s\t", prefix);
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printf("port %u priority %u",
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req->ifbr_portno, req->ifbr_priority);
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if (req->ifbr_ifsflags & IFBIF_STP) {
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printf(" path cost %u", req->ifbr_path_cost);
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if (req->ifbr_state <
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sizeof(stpstates) / sizeof(stpstates[0]))
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printf(" %s", stpstates[req->ifbr_state]);
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else
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printf(" <unknown state %d>",
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req->ifbr_state);
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}
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printf("\n");
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}
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free(inbuf);
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}
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static void
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bridge_addresses(int s, const char *prefix)
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{
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struct ifbaconf ifbac;
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struct ifbareq *ifba;
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char *inbuf = NULL, *ninbuf;
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int i, len = 8192;
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struct ether_addr ea;
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for (;;) {
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ninbuf = realloc(inbuf, len);
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if (ninbuf == NULL)
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err(1, "unable to allocate address buffer");
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ifbac.ifbac_len = len;
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ifbac.ifbac_buf = inbuf = ninbuf;
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if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0)
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err(1, "unable to get address cache");
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if ((ifbac.ifbac_len + sizeof(*ifba)) < len)
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break;
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len *= 2;
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}
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for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) {
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ifba = ifbac.ifbac_req + i;
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memcpy(ea.octet, ifba->ifba_dst,
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sizeof(ea.octet));
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printf("%s%s %s %lu ", prefix, ether_ntoa(&ea),
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ifba->ifba_ifsname, ifba->ifba_expire);
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printb("flags", ifba->ifba_flags, IFBAFBITS);
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printf("\n");
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}
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free(inbuf);
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}
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static void
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bridge_status(int s)
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{
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struct ifbrparam param;
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u_int16_t pri;
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u_int8_t ht, fd, ma;
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if (do_cmd(s, BRDGGPRI, ¶m, sizeof(param), 0) < 0)
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return;
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pri = param.ifbrp_prio;
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if (do_cmd(s, BRDGGHT, ¶m, sizeof(param), 0) < 0)
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return;
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ht = param.ifbrp_hellotime;
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if (do_cmd(s, BRDGGFD, ¶m, sizeof(param), 0) < 0)
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return;
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fd = param.ifbrp_fwddelay;
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if (do_cmd(s, BRDGGMA, ¶m, sizeof(param), 0) < 0)
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return;
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ma = param.ifbrp_maxage;
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printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n",
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pri, ht, fd, ma);
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bridge_interfaces(s, "\tmember: ", 0);
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return;
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}
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static void
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setbridge_add(const char *val, int d, int s, const struct afswtch *afp)
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{
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struct ifbreq req;
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memset(&req, 0, sizeof(req));
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strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
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if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0)
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err(1, "BRDGADD %s", val);
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}
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static void
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setbridge_delete(const char *val, int d, int s, const struct afswtch *afp)
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{
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struct ifbreq req;
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memset(&req, 0, sizeof(req));
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strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
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if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0)
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err(1, "BRDGDEL %s", val);
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}
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static void
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setbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
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{
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do_bridgeflag(s, val, IFBIF_DISCOVER, 1);
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}
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static void
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unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
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{
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do_bridgeflag(s, val, IFBIF_DISCOVER, 0);
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}
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static void
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setbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
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{
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do_bridgeflag(s, val, IFBIF_LEARNING, 1);
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}
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static void
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unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
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{
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do_bridgeflag(s, val, IFBIF_LEARNING, 0);
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}
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static void
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setbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
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{
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do_bridgeflag(s, val, IFBIF_STP, 1);
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}
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static void
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unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
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{
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do_bridgeflag(s, val, IFBIF_STP, 0);
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}
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static void
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setbridge_flush(const char *val, int d, int s, const struct afswtch *afp)
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{
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struct ifbreq req;
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memset(&req, 0, sizeof(req));
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req.ifbr_ifsflags = IFBF_FLUSHDYN;
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if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
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err(1, "BRDGFLUSH");
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}
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static void
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setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp)
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{
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struct ifbreq req;
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memset(&req, 0, sizeof(req));
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req.ifbr_ifsflags = IFBF_FLUSHALL;
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if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
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err(1, "BRDGFLUSH");
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}
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static void
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setbridge_static(const char *val, const char *mac, int s,
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const struct afswtch *afp)
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{
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struct ifbareq req;
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struct ether_addr *ea;
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memset(&req, 0, sizeof(req));
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strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname));
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ea = ether_aton(mac);
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if (ea == NULL)
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errx(1, "%s: invalid address: %s", val, mac);
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memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
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req.ifba_flags = IFBAF_STATIC;
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if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0)
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err(1, "BRDGSADDR %s", val);
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}
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static void
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setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp)
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{
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struct ifbareq req;
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struct ether_addr *ea;
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memset(&req, 0, sizeof(req));
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ea = ether_aton(val);
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if (ea == NULL)
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errx(1, "invalid address: %s", val);
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memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
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if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0)
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err(1, "BRDGDADDR %s", val);
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}
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static void
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setbridge_addr(const char *val, int d, int s, const struct afswtch *afp)
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{
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bridge_addresses(s, "");
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}
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static void
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setbridge_maxaddr(const char *arg, int d, int s, const struct afswtch *afp)
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{
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struct ifbrparam param;
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u_long val;
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if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0)
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errx(1, "invalid value: %s", arg);
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param.ifbrp_csize = val & 0xffffffff;
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if (do_cmd(s, BRDGSCACHE, ¶m, sizeof(param), 1) < 0)
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err(1, "BRDGSCACHE %s", arg);
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}
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static void
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setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp)
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{
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struct ifbrparam param;
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u_long val;
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if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
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errx(1, "invalid value: %s", arg);
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param.ifbrp_hellotime = val & 0xff;
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if (do_cmd(s, BRDGSHT, ¶m, sizeof(param), 1) < 0)
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err(1, "BRDGSHT %s", arg);
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}
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static void
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setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp)
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{
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struct ifbrparam param;
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u_long val;
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if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
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errx(1, "invalid value: %s", arg);
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param.ifbrp_fwddelay = val & 0xff;
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if (do_cmd(s, BRDGSFD, ¶m, sizeof(param), 1) < 0)
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err(1, "BRDGSFD %s", arg);
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}
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static void
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setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp)
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{
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struct ifbrparam param;
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u_long val;
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||||
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||||
if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
|
||||
errx(1, "invalid value: %s", arg);
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||||
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||||
param.ifbrp_maxage = val & 0xff;
|
||||
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||||
if (do_cmd(s, BRDGSMA, ¶m, sizeof(param), 1) < 0)
|
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err(1, "BRDGSMA %s", arg);
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||||
}
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||||
|
||||
static void
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setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp)
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{
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struct ifbrparam param;
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u_long val;
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||||
|
||||
if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0)
|
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errx(1, "invalid value: %s", arg);
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||||
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||||
param.ifbrp_prio = val & 0xffff;
|
||||
|
||||
if (do_cmd(s, BRDGSPRI, ¶m, sizeof(param), 1) < 0)
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err(1, "BRDGSPRI %s", arg);
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}
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||||
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||||
static void
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setbridge_ifpriority(const char *ifn, const char *pri, int s,
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||||
const struct afswtch *afp)
|
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{
|
||||
struct ifbreq req;
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||||
u_long val;
|
||||
|
||||
memset(&req, 0, sizeof(req));
|
||||
|
||||
if (get_val(pri, &val) < 0 || (val & ~0xff) != 0)
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||||
errx(1, "invalid value: %s", pri);
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||||
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||||
strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
|
||||
req.ifbr_priority = val & 0xff;
|
||||
|
||||
if (do_cmd(s, BRDGSIFPRIO, &req, sizeof(req), 1) < 0)
|
||||
err(1, "BRDGSIFPRIO %s", pri);
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||||
}
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||||
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||||
static void
|
||||
setbridge_ifpathcost(const char *ifn, const char *cost, int s,
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||||
const struct afswtch *afp)
|
||||
{
|
||||
struct ifbreq req;
|
||||
u_long val;
|
||||
|
||||
memset(&req, 0, sizeof(req));
|
||||
|
||||
if (get_val(cost, &val) < 0 || (val & ~0xff) != 0)
|
||||
errx(1, "invalid value: %s", cost);
|
||||
|
||||
strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
|
||||
req.ifbr_path_cost = val & 0xffff;
|
||||
|
||||
if (do_cmd(s, BRDGSIFCOST, &req, sizeof(req), 1) < 0)
|
||||
err(1, "BRDGSIFCOST %s", cost);
|
||||
}
|
||||
|
||||
static void
|
||||
setbridge_timeout(const char *arg, int d, int s, const struct afswtch *afp)
|
||||
{
|
||||
struct ifbrparam param;
|
||||
u_long val;
|
||||
|
||||
if (get_val(arg, &val) < 0 || (val & ~0xffffffff) != 0)
|
||||
errx(1, "invalid value: %s", arg);
|
||||
|
||||
param.ifbrp_ctime = val & 0xffffffff;
|
||||
|
||||
if (do_cmd(s, BRDGSTO, ¶m, sizeof(param), 1) < 0)
|
||||
err(1, "BRDGSTO %s", arg);
|
||||
}
|
||||
|
||||
static struct cmd bridge_cmds[] = {
|
||||
DEF_CMD_ARG("addm", setbridge_add),
|
||||
DEF_CMD_ARG("deletem", setbridge_delete),
|
||||
DEF_CMD_ARG("discover", setbridge_discover),
|
||||
DEF_CMD_ARG("-discover", unsetbridge_discover),
|
||||
DEF_CMD_ARG("learn", setbridge_learn),
|
||||
DEF_CMD_ARG("-learn", unsetbridge_learn),
|
||||
DEF_CMD_ARG("stp", setbridge_stp),
|
||||
DEF_CMD_ARG("-stp", unsetbridge_stp),
|
||||
DEF_CMD("flush", 0, setbridge_flush),
|
||||
DEF_CMD("flushall", 0, setbridge_flushall),
|
||||
DEF_CMD_ARG2("static", setbridge_static),
|
||||
DEF_CMD_ARG("deladdr", setbridge_deladdr),
|
||||
DEF_CMD("addr", 1, setbridge_addr),
|
||||
DEF_CMD_ARG("maxaddr", setbridge_maxaddr),
|
||||
DEF_CMD_ARG("hellotime", setbridge_hellotime),
|
||||
DEF_CMD_ARG("fwddelay", setbridge_fwddelay),
|
||||
DEF_CMD_ARG("maxage", setbridge_maxage),
|
||||
DEF_CMD_ARG("priority", setbridge_priority),
|
||||
DEF_CMD_ARG2("ifpriority", setbridge_ifpriority),
|
||||
DEF_CMD_ARG2("ifpathcost", setbridge_ifpathcost),
|
||||
DEF_CMD_ARG("timeout", setbridge_timeout),
|
||||
};
|
||||
static struct afswtch af_bridge = {
|
||||
.af_name = "af_bridge",
|
||||
.af_af = AF_UNSPEC,
|
||||
.af_other_status = bridge_status,
|
||||
};
|
||||
|
||||
static __constructor void
|
||||
bridge_ctor(void)
|
||||
{
|
||||
#define N(a) (sizeof(a) / sizeof(a[0]))
|
||||
int i;
|
||||
|
||||
for (i = 0; i < N(bridge_cmds); i++)
|
||||
cmd_register(&bridge_cmds[i]);
|
||||
af_register(&af_bridge);
|
||||
#undef N
|
||||
}
|
||||
169
share/man/man4/if_bridge.4
Normal file
169
share/man/man4/if_bridge.4
Normal file
@ -0,0 +1,169 @@
|
||||
.\" $NetBSD: bridge.4,v 1.5 2004/01/31 20:14:11 jdc Exp $
|
||||
.\"
|
||||
.\" Copyright 2001 Wasabi Systems, Inc.
|
||||
.\" All rights reserved.
|
||||
.\"
|
||||
.\" Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||||
.\"
|
||||
.\" 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.
|
||||
.\" 3. All advertising materials mentioning features or use of this software
|
||||
.\" must display the following acknowledgement:
|
||||
.\" This product includes software developed for the NetBSD Project by
|
||||
.\" Wasabi Systems, Inc.
|
||||
.\" 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||||
.\" or promote products derived from this software without specific prior
|
||||
.\" written permission.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
||||
.\" 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.
|
||||
.\"
|
||||
.\" $FreeBSD$
|
||||
.Dd January 4, 2004
|
||||
.Dt IF_BRIDGE 4
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm if_bridge
|
||||
.Nd network bridge device
|
||||
.Sh SYNOPSIS
|
||||
.Cd device if_bridge
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Nm
|
||||
driver creates a logical link between two or more IEEE 802 networks
|
||||
that use the same (or
|
||||
.Dq similar enough )
|
||||
framing format.
|
||||
For example, it is possible to bridge Ethernet and 802.11 networks together,
|
||||
but it is not possible to bridge Ethernet and Token Ring together.
|
||||
.Pp
|
||||
Each
|
||||
.Nm
|
||||
interface is created at runtime using interface cloning.
|
||||
This is
|
||||
most easily done with the
|
||||
.Xr ifconfig 8
|
||||
.Cm create
|
||||
command or using the
|
||||
.Va cloned_interfaces
|
||||
variable in
|
||||
.Xr rc.conf 5 .
|
||||
.Pp
|
||||
A bridge can be used to provide several services, such as a simple
|
||||
802.11-to-Ethernet bridge for wireless hosts, and traffic isolation.
|
||||
.Pp
|
||||
A bridge works like a hub, forwarding traffic from one interface
|
||||
to another.
|
||||
Multicast and broadcast packets are always forwarded to all
|
||||
interfaces that are part of the bridge.
|
||||
For unicast traffic, the bridge learns which MAC addresses are associated
|
||||
with which interfaces and will forward the traffic selectively.
|
||||
.Pp
|
||||
The
|
||||
.Nm
|
||||
driver implements the IEEE 802.1D Spanning Tree protocol (STP).
|
||||
Spanning Tree is used to detect and remove loops in a network topology.
|
||||
.Pp
|
||||
When filtering is enabled, bridged packets will pass through the filter
|
||||
inbound on the originating interface, on the bridge interface and outbound on
|
||||
the appropriate interfaces. This behaviour can be controlled using
|
||||
.Xr sysctl 8 :
|
||||
.Bl -tag -width ".Va net.link.bridge.pfil_member"
|
||||
.It Va net.link.bridge.pfil_member
|
||||
Set to
|
||||
.Li 1
|
||||
to enable enable filtering on the incoming and outgoing member interfaces, set
|
||||
to
|
||||
.Li 0
|
||||
to disable it.
|
||||
.It Va net.link.bridge.pfil_bridge
|
||||
Set to
|
||||
.Li 1
|
||||
to enable enable filtering on the bridge interface, set
|
||||
to
|
||||
.Li 0
|
||||
to disable it.
|
||||
.El
|
||||
.Pp
|
||||
ARP and REVARP packets are forwarded without being filtered and others
|
||||
that are not IP nor IPv6 packets are not forwarded when filtering is
|
||||
enabled.
|
||||
.Pp
|
||||
Note that packets to and from the bridging host will be seen by the
|
||||
filter on the interface with the appropriate address configured as well
|
||||
as on the interface on which the packet arrives or departs.
|
||||
.Sh EXAMPLES
|
||||
The following then placed in the file
|
||||
.Pa /etc/rc.conf
|
||||
will cause the a bridge called
|
||||
.Sq bridge0
|
||||
to be created, and will add the interfaces
|
||||
.Sq wi0
|
||||
and
|
||||
.Sq fxp0
|
||||
to the bridge, and then enable packet forwarding.
|
||||
Such a configuration could be used to implement a simple
|
||||
802.11-to-Ethernet bridge (assuming the 802.11 interface is
|
||||
in ad-hoc mode).
|
||||
.Bd -literal -offset indent
|
||||
cloned_interfaces="bridge0"
|
||||
ifconfig_bridge0="addm wi0 addm fxp0 up"
|
||||
.Ed
|
||||
.Pp
|
||||
Consider a system with two 4-port Ethernet boards.
|
||||
The following will cause a bridge consisting of all 8 ports with Spanning Tree
|
||||
enabled to be created:
|
||||
.Bd -literal -offset indent
|
||||
iconfig bridge0 create
|
||||
ifconfig bridge0 \e
|
||||
addm fxp0 stp fxp0 \e
|
||||
addm fxp1 stp fxp1 \e
|
||||
addm fxp2 stp fxp2 \e
|
||||
addm fxp3 stp fxp3 \e
|
||||
addm fxp4 stp fxp4 \e
|
||||
addm fxp5 stp fxp5 \e
|
||||
addm fxp6 stp fxp6 \e
|
||||
addm fxp7 stp fxp7 \e
|
||||
up
|
||||
.Ed
|
||||
.Sh SEE ALSO
|
||||
.Xr ifconfig 8
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
driver first appeared in
|
||||
.Fx 6.0 .
|
||||
.Sh AUTHORS
|
||||
The
|
||||
.Nm bridge
|
||||
driver was originally written by
|
||||
.An Jason L. Wright
|
||||
.Aq jason@thought.net
|
||||
as part of an undergraduate independent study at the University of
|
||||
North Carolina at Greensboro.
|
||||
.Pp
|
||||
This version of the
|
||||
.Nm
|
||||
driver has been heavily modified from the original version by
|
||||
.An Jason R. Thorpe
|
||||
.Aq thorpej@wasabisystems.com .
|
||||
.Sh BUGS
|
||||
The
|
||||
.Nm
|
||||
driver currently supports only Ethernet and Ethernet-like (e.g. 802.11)
|
||||
network devices, with exactly the same interface MTU size as the bridge device.
|
||||
1174
sys/net/bridgestp.c
Normal file
1174
sys/net/bridgestp.c
Normal file
File diff suppressed because it is too large
Load Diff
2408
sys/net/if_bridge.c
Normal file
2408
sys/net/if_bridge.c
Normal file
File diff suppressed because it is too large
Load Diff
357
sys/net/if_bridgevar.h
Normal file
357
sys/net/if_bridgevar.h
Normal file
@ -0,0 +1,357 @@
|
||||
/* $NetBSD: if_bridgevar.h,v 1.4 2003/07/08 07:13:50 itojun Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright 2001 Wasabi Systems, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
|
||||
*
|
||||
* 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed for the NetBSD Project by
|
||||
* Wasabi Systems, Inc.
|
||||
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
|
||||
* or promote products derived from this software without specific prior
|
||||
* written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
|
||||
* 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.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by Jason L. Wright
|
||||
* 4. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
||||
*
|
||||
* OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
/*
|
||||
* Data structure and control definitions for bridge interfaces.
|
||||
*/
|
||||
|
||||
#include <sys/callout.h>
|
||||
#include <sys/queue.h>
|
||||
|
||||
/*
|
||||
* Commands used in the SIOCSDRVSPEC ioctl. Note the lookup of the
|
||||
* bridge interface itself is keyed off the ifdrv structure.
|
||||
*/
|
||||
#define BRDGADD 0 /* add bridge member (ifbreq) */
|
||||
#define BRDGDEL 1 /* delete bridge member (ifbreq) */
|
||||
#define BRDGGIFFLGS 2 /* get member if flags (ifbreq) */
|
||||
#define BRDGSIFFLGS 3 /* set member if flags (ifbreq) */
|
||||
#define BRDGSCACHE 4 /* set cache size (ifbrparam) */
|
||||
#define BRDGGCACHE 5 /* get cache size (ifbrparam) */
|
||||
#define BRDGGIFS 6 /* get member list (ifbifconf) */
|
||||
#define BRDGRTS 7 /* get address list (ifbaconf) */
|
||||
#define BRDGSADDR 8 /* set static address (ifbareq) */
|
||||
#define BRDGSTO 9 /* set cache timeout (ifbrparam) */
|
||||
#define BRDGGTO 10 /* get cache timeout (ifbrparam) */
|
||||
#define BRDGDADDR 11 /* delete address (ifbareq) */
|
||||
#define BRDGFLUSH 12 /* flush address cache (ifbreq) */
|
||||
|
||||
#define BRDGGPRI 13 /* get priority (ifbrparam) */
|
||||
#define BRDGSPRI 14 /* set priority (ifbrparam) */
|
||||
#define BRDGGHT 15 /* get hello time (ifbrparam) */
|
||||
#define BRDGSHT 16 /* set hello time (ifbrparam) */
|
||||
#define BRDGGFD 17 /* get forward delay (ifbrparam) */
|
||||
#define BRDGSFD 18 /* set forward delay (ifbrparam) */
|
||||
#define BRDGGMA 19 /* get max age (ifbrparam) */
|
||||
#define BRDGSMA 20 /* set max age (ifbrparam) */
|
||||
#define BRDGSIFPRIO 21 /* set if priority (ifbreq) */
|
||||
#define BRDGSIFCOST 22 /* set if path cost (ifbreq) */
|
||||
|
||||
/*
|
||||
* Generic bridge control request.
|
||||
*/
|
||||
struct ifbreq {
|
||||
char ifbr_ifsname[IFNAMSIZ]; /* member if name */
|
||||
uint32_t ifbr_ifsflags; /* member if flags */
|
||||
uint8_t ifbr_state; /* member if STP state */
|
||||
uint8_t ifbr_priority; /* member if STP priority */
|
||||
uint8_t ifbr_path_cost; /* member if STP cost */
|
||||
uint8_t ifbr_portno; /* member if port number */
|
||||
};
|
||||
|
||||
/* BRDGGIFFLAGS, BRDGSIFFLAGS */
|
||||
#define IFBIF_LEARNING 0x01 /* if can learn */
|
||||
#define IFBIF_DISCOVER 0x02 /* if sends packets w/ unknown dest. */
|
||||
#define IFBIF_STP 0x04 /* if participates in spanning tree */
|
||||
|
||||
#define IFBIFBITS "\020\1LEARNING\2DISCOVER\3STP"
|
||||
|
||||
/* BRDGFLUSH */
|
||||
#define IFBF_FLUSHDYN 0x00 /* flush learned addresses only */
|
||||
#define IFBF_FLUSHALL 0x01 /* flush all addresses */
|
||||
|
||||
/* STP port states */
|
||||
#define BSTP_IFSTATE_DISABLED 0
|
||||
#define BSTP_IFSTATE_LISTENING 1
|
||||
#define BSTP_IFSTATE_LEARNING 2
|
||||
#define BSTP_IFSTATE_FORWARDING 3
|
||||
#define BSTP_IFSTATE_BLOCKING 4
|
||||
|
||||
/*
|
||||
* Interface list structure.
|
||||
*/
|
||||
struct ifbifconf {
|
||||
uint32_t ifbic_len; /* buffer size */
|
||||
union {
|
||||
caddr_t ifbicu_buf;
|
||||
struct ifbreq *ifbicu_req;
|
||||
} ifbic_ifbicu;
|
||||
#define ifbic_buf ifbic_ifbicu.ifbicu_buf
|
||||
#define ifbic_req ifbic_ifbicu.ifbicu_req
|
||||
};
|
||||
|
||||
/*
|
||||
* Bridge address request.
|
||||
*/
|
||||
struct ifbareq {
|
||||
char ifba_ifsname[IFNAMSIZ]; /* member if name */
|
||||
unsigned long ifba_expire; /* address expire time */
|
||||
uint8_t ifba_flags; /* address flags */
|
||||
uint8_t ifba_dst[ETHER_ADDR_LEN];/* destination address */
|
||||
};
|
||||
|
||||
#define IFBAF_TYPEMASK 0x03 /* address type mask */
|
||||
#define IFBAF_DYNAMIC 0x00 /* dynamically learned address */
|
||||
#define IFBAF_STATIC 0x01 /* static address */
|
||||
|
||||
#define IFBAFBITS "\020\1STATIC"
|
||||
|
||||
/*
|
||||
* Address list structure.
|
||||
*/
|
||||
struct ifbaconf {
|
||||
uint32_t ifbac_len; /* buffer size */
|
||||
union {
|
||||
caddr_t ifbacu_buf;
|
||||
struct ifbareq *ifbacu_req;
|
||||
} ifbac_ifbacu;
|
||||
#define ifbac_buf ifbac_ifbacu.ifbacu_buf
|
||||
#define ifbac_req ifbac_ifbacu.ifbacu_req
|
||||
};
|
||||
|
||||
/*
|
||||
* Bridge parameter structure.
|
||||
*/
|
||||
struct ifbrparam {
|
||||
union {
|
||||
uint32_t ifbrpu_int32;
|
||||
uint16_t ifbrpu_int16;
|
||||
uint8_t ifbrpu_int8;
|
||||
} ifbrp_ifbrpu;
|
||||
};
|
||||
#define ifbrp_csize ifbrp_ifbrpu.ifbrpu_int32 /* cache size */
|
||||
#define ifbrp_ctime ifbrp_ifbrpu.ifbrpu_int32 /* cache time (sec) */
|
||||
#define ifbrp_prio ifbrp_ifbrpu.ifbrpu_int16 /* bridge priority */
|
||||
#define ifbrp_hellotime ifbrp_ifbrpu.ifbrpu_int8 /* hello time (sec) */
|
||||
#define ifbrp_fwddelay ifbrp_ifbrpu.ifbrpu_int8 /* fwd time (sec) */
|
||||
#define ifbrp_maxage ifbrp_ifbrpu.ifbrpu_int8 /* max age (sec) */
|
||||
|
||||
#ifdef _KERNEL
|
||||
/*
|
||||
* Timekeeping structure used in spanning tree code.
|
||||
*/
|
||||
struct bridge_timer {
|
||||
uint16_t active;
|
||||
uint16_t value;
|
||||
};
|
||||
|
||||
struct bstp_config_unit {
|
||||
uint64_t cu_rootid;
|
||||
uint64_t cu_bridge_id;
|
||||
uint32_t cu_root_path_cost;
|
||||
uint16_t cu_message_age;
|
||||
uint16_t cu_max_age;
|
||||
uint16_t cu_hello_time;
|
||||
uint16_t cu_forward_delay;
|
||||
uint16_t cu_port_id;
|
||||
uint8_t cu_message_type;
|
||||
uint8_t cu_topology_change_acknowledgment;
|
||||
uint8_t cu_topology_change;
|
||||
};
|
||||
|
||||
struct bstp_tcn_unit {
|
||||
uint8_t tu_message_type;
|
||||
};
|
||||
|
||||
/*
|
||||
* Bridge interface list entry.
|
||||
*/
|
||||
struct bridge_iflist {
|
||||
LIST_ENTRY(bridge_iflist) bif_next;
|
||||
uint64_t bif_designated_root;
|
||||
uint64_t bif_designated_bridge;
|
||||
uint32_t bif_path_cost;
|
||||
uint32_t bif_designated_cost;
|
||||
struct bridge_timer bif_hold_timer;
|
||||
struct bridge_timer bif_message_age_timer;
|
||||
struct bridge_timer bif_forward_delay_timer;
|
||||
struct bstp_config_unit bif_config_bpdu;
|
||||
uint16_t bif_port_id;
|
||||
uint16_t bif_designated_port;
|
||||
uint8_t bif_state;
|
||||
uint8_t bif_topology_change_acknowledge;
|
||||
uint8_t bif_config_pending;
|
||||
uint8_t bif_change_detection_enabled;
|
||||
uint8_t bif_priority;
|
||||
struct ifnet *bif_ifp; /* member if */
|
||||
uint32_t bif_flags; /* member if flags */
|
||||
};
|
||||
|
||||
/*
|
||||
* Bridge route node.
|
||||
*/
|
||||
struct bridge_rtnode {
|
||||
LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */
|
||||
LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */
|
||||
struct ifnet *brt_ifp; /* destination if */
|
||||
unsigned long brt_expire; /* expiration time */
|
||||
uint8_t brt_flags; /* address flags */
|
||||
uint8_t brt_addr[ETHER_ADDR_LEN];
|
||||
};
|
||||
|
||||
/*
|
||||
* Software state for each bridge.
|
||||
*/
|
||||
struct bridge_softc {
|
||||
struct arpcom ifb_ac; /* make this an interface */
|
||||
LIST_ENTRY(bridge_softc) sc_list;
|
||||
struct mtx sc_mtx;
|
||||
struct cv sc_cv;
|
||||
uint64_t sc_designated_root;
|
||||
uint64_t sc_bridge_id;
|
||||
struct bridge_iflist *sc_root_port;
|
||||
uint32_t sc_root_path_cost;
|
||||
uint16_t sc_max_age;
|
||||
uint16_t sc_hello_time;
|
||||
uint16_t sc_forward_delay;
|
||||
uint16_t sc_bridge_max_age;
|
||||
uint16_t sc_bridge_hello_time;
|
||||
uint16_t sc_bridge_forward_delay;
|
||||
uint16_t sc_topology_change_time;
|
||||
uint16_t sc_hold_time;
|
||||
uint16_t sc_bridge_priority;
|
||||
uint8_t sc_topology_change_detected;
|
||||
uint8_t sc_topology_change;
|
||||
struct bridge_timer sc_hello_timer;
|
||||
struct bridge_timer sc_topology_change_timer;
|
||||
struct bridge_timer sc_tcn_timer;
|
||||
uint32_t sc_brtmax; /* max # of addresses */
|
||||
uint32_t sc_brtcnt; /* cur. # of addresses */
|
||||
uint32_t sc_brttimeout; /* rt timeout in seconds */
|
||||
struct callout sc_brcallout; /* bridge callout */
|
||||
struct callout sc_bstpcallout; /* STP callout */
|
||||
uint32_t sc_iflist_ref; /* refcount for sc_iflist */
|
||||
uint32_t sc_iflist_xcnt; /* refcount for sc_iflist */
|
||||
LIST_HEAD(, bridge_iflist) sc_iflist; /* member interface list */
|
||||
LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */
|
||||
LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */
|
||||
uint32_t sc_rthash_key; /* key for hash */
|
||||
};
|
||||
|
||||
#define BRIDGE_LOCK_INIT(_sc) do { \
|
||||
mtx_init(&(_sc)->sc_mtx, "if_bridge", NULL, MTX_DEF); \
|
||||
cv_init(&(_sc)->sc_cv, "if_bridge_cv"); \
|
||||
} while (0)
|
||||
#define BRIDGE_LOCK_DESTROY(_sc) do { \
|
||||
mtx_destroy(&(_sc)->sc_mtx); \
|
||||
cv_destroy(&(_sc)->sc_cv); \
|
||||
} while (0)
|
||||
#define BRIDGE_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
|
||||
#define BRIDGE_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
|
||||
#define BRIDGE_LOCKED(_sc) mtx_owned(&(_sc)->sc_mtx)
|
||||
#define BRIDGE_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
|
||||
#define BRIDGE_LOCK2REF(_sc, _err) do { \
|
||||
mtx_assert(&(_sc)->sc_mtx, MA_OWNED); \
|
||||
if ((_sc)->sc_iflist_xcnt > 0) \
|
||||
(_err) = EBUSY; \
|
||||
else \
|
||||
(_sc)->sc_iflist_ref++; \
|
||||
mtx_unlock(&(_sc)->sc_mtx); \
|
||||
} while (0)
|
||||
#define BRIDGE_UNREF(_sc) do { \
|
||||
mtx_lock(&(_sc)->sc_mtx); \
|
||||
(_sc)->sc_iflist_ref--; \
|
||||
if (((_sc)->sc_iflist_xcnt > 0) && ((_sc)->sc_iflist_ref == 0)) \
|
||||
cv_broadcast(&(_sc)->sc_cv); \
|
||||
mtx_unlock(&(_sc)->sc_mtx); \
|
||||
} while (0)
|
||||
#define BRIDGE_XLOCK(_sc) do { \
|
||||
mtx_assert(&(_sc)->sc_mtx, MA_OWNED); \
|
||||
(_sc)->sc_iflist_xcnt++; \
|
||||
while ((_sc)->sc_iflist_ref > 0) \
|
||||
cv_wait(&(_sc)->sc_cv, &(_sc)->sc_mtx); \
|
||||
} while (0)
|
||||
#define BRIDGE_XDROP(_sc) do { \
|
||||
mtx_assert(&(_sc)->sc_mtx, MA_OWNED); \
|
||||
(_sc)->sc_iflist_xcnt--; \
|
||||
} while (0)
|
||||
|
||||
extern const uint8_t bstp_etheraddr[];
|
||||
|
||||
void bridge_ifdetach(struct ifnet *);
|
||||
void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp, int);
|
||||
|
||||
int bridge_output(struct ifnet *, struct mbuf *, struct sockaddr *,
|
||||
struct rtentry *);
|
||||
struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
|
||||
|
||||
extern void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
|
||||
|
||||
void bstp_initialization(struct bridge_softc *);
|
||||
void bstp_linkstate(struct ifnet *, int);
|
||||
void bstp_stop(struct bridge_softc *);
|
||||
struct mbuf *bstp_input(struct ifnet *, struct mbuf *);
|
||||
|
||||
void bridge_enqueue(struct bridge_softc *, struct ifnet *, struct mbuf *,
|
||||
int);
|
||||
|
||||
#endif /* _KERNEL */
|
||||
Loading…
Reference in New Issue
Block a user