freebsd-nq/sbin/ifconfig/ifbridge.c
Andrew Thompson 3fab76690c Bring in support for the Rapid Spanning Tree Protocol (802.1w).
RSTP provides faster spanning tree convergence, the protocol will exchange
information with neighboring switches to quickly transition to forwarding
without creating loops. The code will default to RSTP mode but will downgrade
any port connected to a legacy STP network so is fully backward compatible.

Reviewed by:	syrinx
Tested by:	syrinx
2006-11-01 09:07:47 +00:00

683 lines
16 KiB
C

/*-
* 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.
*/
#ifndef lint
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <stdlib.h>
#include <unistd.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_bridgevar.h>
#include <net/route.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#include "ifconfig.h"
static const char *stpstates[] = {
"disabled",
"listening",
"learning",
"forwarding",
"blocking",
"discarding"
};
static const char *stpproto[] = {
"stp",
"-",
"rstp"
};
static const char *stproles[] = {
"disabled",
"root",
"designated",
"alternate",
"backup"
};
static int
get_val(const char *cp, u_long *valp)
{
char *endptr;
u_long val;
errno = 0;
val = strtoul(cp, &endptr, 0);
if (cp[0] == '\0' || endptr[0] != '\0' || errno == ERANGE)
return (-1);
*valp = val;
return (0);
}
static int
do_cmd(int sock, u_long op, void *arg, size_t argsize, int set)
{
struct ifdrv ifd;
memset(&ifd, 0, sizeof(ifd));
strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name));
ifd.ifd_cmd = op;
ifd.ifd_len = argsize;
ifd.ifd_data = arg;
return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd));
}
static void
do_bridgeflag(int sock, const char *ifs, int flag, int set)
{
struct ifbreq req;
strlcpy(req.ifbr_ifsname, ifs, sizeof(req.ifbr_ifsname));
if (do_cmd(sock, BRDGGIFFLGS, &req, sizeof(req), 0) < 0)
err(1, "unable to get bridge flags");
if (set)
req.ifbr_ifsflags |= flag;
else
req.ifbr_ifsflags &= ~flag;
if (do_cmd(sock, BRDGSIFFLGS, &req, sizeof(req), 1) < 0)
err(1, "unable to set bridge flags");
}
static void
bridge_interfaces(int s, const char *prefix)
{
struct ifbifconf bifc;
struct ifbreq *req;
char *inbuf = NULL, *ninbuf;
char *p, *pad;
int i, len = 8192;
pad = strdup(prefix);
if (pad == NULL)
err(1, "strdup");
/* replace the prefix with whitespace */
for (p = pad; *p != '\0'; p++) {
if(isprint(*p))
*p = ' ';
}
for (;;) {
ninbuf = realloc(inbuf, len);
if (ninbuf == NULL)
err(1, "unable to allocate interface buffer");
bifc.ifbic_len = len;
bifc.ifbic_buf = inbuf = ninbuf;
if (do_cmd(s, BRDGGIFS, &bifc, sizeof(bifc), 0) < 0)
err(1, "unable to get interface list");
if ((bifc.ifbic_len + sizeof(*req)) < len)
break;
len *= 2;
}
for (i = 0; i < bifc.ifbic_len / sizeof(*req); i++) {
req = bifc.ifbic_req + i;
printf("%s%s ", prefix, req->ifbr_ifsname);
printb("flags", req->ifbr_ifsflags, IFBIFBITS);
printf("\n");
if (req->ifbr_ifsflags & IFBIF_STP) {
printf("%s", pad);
printf("port %u priority %u",
req->ifbr_portno, req->ifbr_priority);
printf(" path cost %u", req->ifbr_path_cost);
if (req->ifbr_proto <
sizeof(stpproto) / sizeof(stpproto[0]))
printf(" proto %s", stpproto[req->ifbr_proto]);
else
printf(" <unknown proto %d>",
req->ifbr_proto);
printf("\n%s", pad);
if (req->ifbr_role <
sizeof(stproles) / sizeof(stproles[0]))
printf("role %s", stproles[req->ifbr_role]);
else
printf("<unknown role %d>",
req->ifbr_role);
if (req->ifbr_state <
sizeof(stpstates) / sizeof(stpstates[0]))
printf(" state %s", stpstates[req->ifbr_state]);
else
printf(" <unknown state %d>",
req->ifbr_state);
if (req->ifbr_p2p)
printf(" p2p");
else
printf(" shared");
if (req->ifbr_edge)
printf(" edge");
if (req->ifbr_autoedge)
printf(" autoedge");
printf("\n");
}
}
free(inbuf);
}
static void
bridge_addresses(int s, const char *prefix)
{
struct ifbaconf ifbac;
struct ifbareq *ifba;
char *inbuf = NULL, *ninbuf;
int i, len = 8192;
struct ether_addr ea;
for (;;) {
ninbuf = realloc(inbuf, len);
if (ninbuf == NULL)
err(1, "unable to allocate address buffer");
ifbac.ifbac_len = len;
ifbac.ifbac_buf = inbuf = ninbuf;
if (do_cmd(s, BRDGRTS, &ifbac, sizeof(ifbac), 0) < 0)
err(1, "unable to get address cache");
if ((ifbac.ifbac_len + sizeof(*ifba)) < len)
break;
len *= 2;
}
for (i = 0; i < ifbac.ifbac_len / sizeof(*ifba); i++) {
ifba = ifbac.ifbac_req + i;
memcpy(ea.octet, ifba->ifba_dst,
sizeof(ea.octet));
printf("%s%s %s %lu ", prefix, ether_ntoa(&ea),
ifba->ifba_ifsname, ifba->ifba_expire);
printb("flags", ifba->ifba_flags, IFBAFBITS);
printf("\n");
}
free(inbuf);
}
static void
bridge_status(int s)
{
struct ifbropreq param;
u_int16_t pri;
u_int8_t ht, fd, ma, hc, pro;
if (do_cmd(s, BRDGPARAM, &param, sizeof(param), 0) < 0)
return;
pri = param.ifbop_priority;
pro = param.ifbop_protocol;
ht = param.ifbop_hellotime;
fd = param.ifbop_fwddelay;
hc = param.ifbop_holdcount;
ma = param.ifbop_maxage;
printf("\tpriority %u hellotime %u fwddelay %u"
" maxage %u hc %u proto %s\n",
pri, ht, fd, ma, hc, stpproto[pro]);
bridge_interfaces(s, "\tmember: ");
return;
}
static void
setbridge_add(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
if (do_cmd(s, BRDGADD, &req, sizeof(req), 1) < 0)
err(1, "BRDGADD %s", val);
}
static void
setbridge_delete(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
if (do_cmd(s, BRDGDEL, &req, sizeof(req), 1) < 0)
err(1, "BRDGDEL %s", val);
}
static void
setbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
{
do_bridgeflag(s, val, IFBIF_DISCOVER, 1);
}
static void
unsetbridge_discover(const char *val, int d, int s, const struct afswtch *afp)
{
do_bridgeflag(s, val, IFBIF_DISCOVER, 0);
}
static void
setbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
{
do_bridgeflag(s, val, IFBIF_LEARNING, 1);
}
static void
unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
{
do_bridgeflag(s, val, IFBIF_LEARNING, 0);
}
static void
setbridge_span(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
if (do_cmd(s, BRDGADDS, &req, sizeof(req), 1) < 0)
err(1, "BRDGADDS %s", val);
}
static void
unsetbridge_span(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
if (do_cmd(s, BRDGDELS, &req, sizeof(req), 1) < 0)
err(1, "BRDGDELS %s", val);
}
static void
setbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
{
do_bridgeflag(s, val, IFBIF_STP, 1);
}
static void
unsetbridge_stp(const char *val, int d, int s, const struct afswtch *afp)
{
do_bridgeflag(s, val, IFBIF_STP, 0);
}
static void
setbridge_edge(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
req.ifbr_edge = 1;
if (do_cmd(s, BRDGSEDGE, &req, sizeof(req), 1) < 0)
err(1, "BRDGSEDGE %s", val);
}
static void
unsetbridge_edge(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
req.ifbr_edge = 0;
if (do_cmd(s, BRDGSEDGE, &req, sizeof(req), 1) < 0)
err(1, "BRDGSEDGE %s", val);
}
static void
setbridge_autoedge(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
req.ifbr_autoedge = 1;
if (do_cmd(s, BRDGSAEDGE, &req, sizeof(req), 1) < 0)
err(1, "BRDGSAEDGE %s", val);
}
static void
unsetbridge_autoedge(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
strlcpy(req.ifbr_ifsname, val, sizeof(req.ifbr_ifsname));
req.ifbr_autoedge = 0;
if (do_cmd(s, BRDGSAEDGE, &req, sizeof(req), 1) < 0)
err(1, "BRDGSAEDGE %s", val);
}
static void
setbridge_flush(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
req.ifbr_ifsflags = IFBF_FLUSHDYN;
if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
err(1, "BRDGFLUSH");
}
static void
setbridge_flushall(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbreq req;
memset(&req, 0, sizeof(req));
req.ifbr_ifsflags = IFBF_FLUSHALL;
if (do_cmd(s, BRDGFLUSH, &req, sizeof(req), 1) < 0)
err(1, "BRDGFLUSH");
}
static void
setbridge_static(const char *val, const char *mac, int s,
const struct afswtch *afp)
{
struct ifbareq req;
struct ether_addr *ea;
memset(&req, 0, sizeof(req));
strlcpy(req.ifba_ifsname, val, sizeof(req.ifba_ifsname));
ea = ether_aton(mac);
if (ea == NULL)
errx(1, "%s: invalid address: %s", val, mac);
memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
req.ifba_flags = IFBAF_STATIC;
if (do_cmd(s, BRDGSADDR, &req, sizeof(req), 1) < 0)
err(1, "BRDGSADDR %s", val);
}
static void
setbridge_deladdr(const char *val, int d, int s, const struct afswtch *afp)
{
struct ifbareq req;
struct ether_addr *ea;
memset(&req, 0, sizeof(req));
ea = ether_aton(val);
if (ea == NULL)
errx(1, "invalid address: %s", val);
memcpy(req.ifba_dst, ea->octet, sizeof(req.ifba_dst));
if (do_cmd(s, BRDGDADDR, &req, sizeof(req), 1) < 0)
err(1, "BRDGDADDR %s", val);
}
static void
setbridge_addr(const char *val, int d, int s, const struct afswtch *afp)
{
bridge_addresses(s, "");
}
static void
setbridge_maxaddr(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_csize = val & 0xffffffff;
if (do_cmd(s, BRDGSCACHE, &param, sizeof(param), 1) < 0)
err(1, "BRDGSCACHE %s", arg);
}
static void
setbridge_hellotime(const char *arg, int d, int s, const struct afswtch *afp)
{
struct ifbrparam param;
u_long val;
if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
errx(1, "invalid value: %s", arg);
param.ifbrp_hellotime = val & 0xff;
if (do_cmd(s, BRDGSHT, &param, sizeof(param), 1) < 0)
err(1, "BRDGSHT %s", arg);
}
static void
setbridge_fwddelay(const char *arg, int d, int s, const struct afswtch *afp)
{
struct ifbrparam param;
u_long val;
if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
errx(1, "invalid value: %s", arg);
param.ifbrp_fwddelay = val & 0xff;
if (do_cmd(s, BRDGSFD, &param, sizeof(param), 1) < 0)
err(1, "BRDGSFD %s", arg);
}
static void
setbridge_maxage(const char *arg, int d, int s, const struct afswtch *afp)
{
struct ifbrparam param;
u_long val;
if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
errx(1, "invalid value: %s", arg);
param.ifbrp_maxage = val & 0xff;
if (do_cmd(s, BRDGSMA, &param, sizeof(param), 1) < 0)
err(1, "BRDGSMA %s", arg);
}
static void
setbridge_priority(const char *arg, int d, int s, const struct afswtch *afp)
{
struct ifbrparam param;
u_long val;
if (get_val(arg, &val) < 0 || (val & ~0xffff) != 0)
errx(1, "invalid value: %s", arg);
param.ifbrp_prio = val & 0xffff;
if (do_cmd(s, BRDGSPRI, &param, sizeof(param), 1) < 0)
err(1, "BRDGSPRI %s", arg);
}
static void
setbridge_protocol(const char *arg, int d, int s, const struct afswtch *afp)
{
struct ifbrparam param;
if (strcasecmp(arg, "stp") == 0) {
param.ifbrp_proto = 0;
} else if (strcasecmp(arg, "rstp") == 0) {
param.ifbrp_proto = 2;
} else {
errx(1, "unknown stp protocol");
}
if (do_cmd(s, BRDGSPROTO, &param, sizeof(param), 1) < 0)
err(1, "BRDGSPROTO %s", arg);
}
static void
setbridge_holdcount(const char *arg, int d, int s, const struct afswtch *afp)
{
struct ifbrparam param;
u_long val;
if (get_val(arg, &val) < 0 || (val & ~0xff) != 0)
errx(1, "invalid value: %s", arg);
param.ifbrp_txhc = val & 0xff;
if (do_cmd(s, BRDGSTXHC, &param, sizeof(param), 1) < 0)
err(1, "BRDGSTXHC %s", arg);
}
static void
setbridge_ifpriority(const char *ifn, const char *pri, int s,
const struct afswtch *afp)
{
struct ifbreq req;
u_long val;
memset(&req, 0, sizeof(req));
if (get_val(pri, &val) < 0 || (val & ~0xff) != 0)
errx(1, "invalid value: %s", pri);
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);
}
static void
setbridge_ifpathcost(const char *ifn, const char *cost, int s,
const struct afswtch *afp)
{
struct ifbreq req;
u_long val;
memset(&req, 0, sizeof(req));
if (get_val(cost, &val) < 0)
errx(1, "invalid value: %s", cost);
strlcpy(req.ifbr_ifsname, ifn, sizeof(req.ifbr_ifsname));
req.ifbr_path_cost = val;
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, &param, 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("span", setbridge_span),
DEF_CMD_ARG("-span", unsetbridge_span),
DEF_CMD_ARG("stp", setbridge_stp),
DEF_CMD_ARG("-stp", unsetbridge_stp),
DEF_CMD_ARG("edge", setbridge_edge),
DEF_CMD_ARG("-edge", unsetbridge_edge),
DEF_CMD_ARG("autoedge", setbridge_autoedge),
DEF_CMD_ARG("-autoedge", unsetbridge_autoedge),
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_ARG("proto", setbridge_protocol),
DEF_CMD_ARG("holdcount", setbridge_holdcount),
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
}