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

1 files changed, 533 insertions, 0 deletions

diff --git a/sbin/ifconfig/ifbridge.c b/sbin/ifconfig/ifbridge.c
new file mode 100644
index 0000000..bf41ea8
--- /dev/null
+++ b/sbin/ifconfig/ifbridge.c
@@ -0,0 +1,533 @@
+/*-
+ * 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 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, int flags)
+{
+	static const char *stpstates[] = {
+		"disabled",
+		"listening",
+		"learning",
+		"forwarding",
+		"blocking",
+	};
+	struct ifbifconf bifc;
+	struct ifbreq *req;
+	char *inbuf = NULL, *ninbuf;
+	int i, len = 8192;
+
+	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 (!flags) continue;
+		
+		printf("%s\t", prefix);
+		printf("port %u priority %u",
+		    req->ifbr_portno, req->ifbr_priority);
+		if (req->ifbr_ifsflags & IFBIF_STP) {
+			printf(" path cost %u", req->ifbr_path_cost);
+			if (req->ifbr_state <
+			    sizeof(stpstates) / sizeof(stpstates[0]))
+				printf(" %s", stpstates[req->ifbr_state]);
+			else
+				printf(" <unknown state %d>",
+				    req->ifbr_state);
+		}
+		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 ifbrparam param;
+	u_int16_t pri;
+	u_int8_t ht, fd, ma;
+
+	if (do_cmd(s, BRDGGPRI, &param, sizeof(param), 0) < 0)
+		return;
+	pri = param.ifbrp_prio;
+
+	if (do_cmd(s, BRDGGHT, &param, sizeof(param), 0) < 0)
+		return;
+	ht = param.ifbrp_hellotime;
+
+	if (do_cmd(s, BRDGGFD, &param, sizeof(param), 0) < 0)
+		return;
+	fd = param.ifbrp_fwddelay;
+
+	if (do_cmd(s, BRDGGMA, &param, sizeof(param), 0) < 0)
+		return;
+	ma = param.ifbrp_maxage;
+
+	printf("\tpriority %u hellotime %u fwddelay %u maxage %u\n",
+	    pri, ht, fd, ma);
+
+	bridge_interfaces(s, "\tmember: ", 0);
+
+	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_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_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_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 || (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, &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("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
+}