Add CARP (Common Address Redundancy Protocol), which allows multiple

hosts to share an IP address, providing high availability and load
balancing.

Original work on CARP done by Michael Shalayeff, with many
additions by Marco Pfatschbacher and Ryan McBride.

FreeBSD port done solely by Max Laier.

Patch by:	mlaier
Obtained from:	OpenBSD (mickey, mcbride)

3 files changed, 346 insertions, 0 deletions

diff --git a/sbin/ifconfig/Makefile b/sbin/ifconfig/Makefile
index 117441b..6b301e9 100644
--- a/sbin/ifconfig/Makefile
+++ b/sbin/ifconfig/Makefile
@@ -23,6 +23,9 @@ SRCS+=	ifmedia.c		# SIOC[GS]IFMEDIA support
 SRCS+=	ifvlan.c		# SIOC[GS]ETVLAN support
 SRCS+=	ifieee80211.c		# SIOC[GS]IEEE80211 support
 
+SRCS+=	ifcarp.c		# SIOC[GS]VH support
+SRCS+=	ifpfsync.c		# pfsync(4) support
+
 .if !defined(RELEASE_CRUNCH)
 SRCS+=	af_ipx.c		# IPX support
 DPADD=	${LIBIPX}
diff --git a/sbin/ifconfig/ifcarp.c b/sbin/ifconfig/ifcarp.c
new file mode 100644
index 0000000..ab6d152
--- /dev/null
+++ b/sbin/ifconfig/ifcarp.c
@@ -0,0 +1,199 @@
+/*	$FreeBSD$ */
+/*	from $OpenBSD: ifconfig.c,v 1.82 2003/10/19 05:43:35 mcbride Exp $ */
+
+/*
+ * Copyright (c) 2002 Michael Shalayeff. All rights reserved.
+ * Copyright (c) 2003 Ryan McBride. 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.
+ *
+ * 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 OR HIS RELATIVES 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 MIND, 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.
+ */
+
+#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 <netinet/ip_carp.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 *carp_states[] = { CARP_STATES };
+
+void carp_status(int s, const struct rt_addrinfo *);
+void setcarp_advbase(const char *,int, int, const struct afswtch *rafp);
+void setcarp_advskew(const char *, int, int, const struct afswtch *rafp);
+void setcarp_passwd(const char *, int, int, const struct afswtch *rafp);
+void setcarp_vhid(const char *, int, int, const struct afswtch *rafp);
+
+void
+carp_status(int s, const struct rt_addrinfo *info __unused)
+{
+	const char *state;
+	struct carpreq carpr;
+
+	memset((char *)&carpr, 0, sizeof(struct carpreq));
+	ifr.ifr_data = (caddr_t)&carpr;
+
+	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
+		return;
+
+	if (carpr.carpr_vhid > 0) {
+		if (carpr.carpr_state > CARP_MAXSTATE)
+			state = "<UNKNOWN>";
+		else
+			state = carp_states[carpr.carpr_state];
+
+		printf("\tcarp: %s vhid %d advbase %d advskew %d\n",
+		    state, carpr.carpr_vhid, carpr.carpr_advbase,
+		    carpr.carpr_advskew);
+	}
+
+	return;
+
+}
+
+void
+setcarp_passwd(const char *val, int d, int s, const struct afswtch *afp)
+{
+	struct carpreq carpr;
+
+	memset((char *)&carpr, 0, sizeof(struct carpreq));
+	ifr.ifr_data = (caddr_t)&carpr;
+
+	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGVH");
+
+	/* XXX Should hash the password into the key here, perhaps? */
+	strlcpy(carpr.carpr_key, val, CARP_KEY_LEN);
+
+	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSVH");
+
+	return;
+}
+
+void
+setcarp_vhid(const char *val, int d, int s, const struct afswtch *afp)
+{
+	int vhid;
+	struct carpreq carpr;
+
+	vhid = atoi(val);
+
+	if (vhid <= 0)
+		errx(1, "vhid must be greater than 0");
+
+	memset((char *)&carpr, 0, sizeof(struct carpreq));
+	ifr.ifr_data = (caddr_t)&carpr;
+
+	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGVH");
+
+	carpr.carpr_vhid = vhid;
+
+	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSVH");
+
+	return;
+}
+
+void
+setcarp_advskew(const char *val, int d, int s, const struct afswtch *afp)
+{
+	int advskew;
+	struct carpreq carpr;
+
+	advskew = atoi(val);
+
+	memset((char *)&carpr, 0, sizeof(struct carpreq));
+	ifr.ifr_data = (caddr_t)&carpr;
+
+	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGVH");
+
+	carpr.carpr_advskew = advskew;
+
+	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSVH");
+
+	return;
+}
+
+void
+setcarp_advbase(const char *val, int d, int s, const struct afswtch *afp)
+{
+	int advbase;
+	struct carpreq carpr;
+
+	advbase = atoi(val);
+
+	memset((char *)&carpr, 0, sizeof(struct carpreq));
+	ifr.ifr_data = (caddr_t)&carpr;
+
+	if (ioctl(s, SIOCGVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGVH");
+
+	carpr.carpr_advbase = advbase;
+
+	if (ioctl(s, SIOCSVH, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSVH");
+
+	return;
+}
+
+static struct cmd carp_cmds[] = {
+	DEF_CMD_ARG("advbase",	setcarp_advbase),
+	DEF_CMD_ARG("advskew",	setcarp_advskew),
+	DEF_CMD_ARG("pass",	setcarp_passwd),
+	DEF_CMD_ARG("vhid",	setcarp_vhid),
+};
+static struct afswtch af_carp = {
+	.af_name	= "af_carp",
+	.af_af		= AF_UNSPEC,
+	.af_status	= carp_status,
+};
+
+static __constructor void
+carp_ctor(void)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+	int i;
+
+	for (i = 0; i < N(carp_cmds);  i++)
+		cmd_register(&carp_cmds[i]);
+	af_register(&af_carp);
+#undef N
+}
diff --git a/sbin/ifconfig/ifpfsync.c b/sbin/ifconfig/ifpfsync.c
new file mode 100644
index 0000000..7ca9883
--- /dev/null
+++ b/sbin/ifconfig/ifpfsync.c
@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2003 Ryan McBride. All rights reserved.
+ * Copyright (c) 2004 Max Laier. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <netinet/in.h>
+#include <net/pfvar.h>
+#include <net/if_pfsync.h>
+#include <net/route.h>
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "ifconfig.h"
+
+void setpfsync_syncif(const char *, int, int, const struct afswtch *rafp);
+void unsetpfsync_syncif(const char *, int, int, const struct afswtch *rafp);
+void setpfsync_maxupd(const char *, int, int, const struct afswtch *rafp);
+void pfsync_status(int, const struct rt_addrinfo *);
+
+void
+setpfsync_syncif(const char *val, int d, int s, const struct afswtch *rafp)
+{
+	struct pfsyncreq preq;
+
+	bzero((char *)&preq, sizeof(struct pfsyncreq));
+	ifr.ifr_data = (caddr_t)&preq;
+
+	if (ioctl(s, SIOCGETPFSYNC, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGETPFSYNC");
+
+	strlcpy(preq.pfsyncr_syncif, val, sizeof(preq.pfsyncr_syncif));
+
+	if (ioctl(s, SIOCSETPFSYNC, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSETPFSYNC");
+}
+
+void
+unsetpfsync_syncif(const char *val, int d, int s, const struct afswtch *rafp)
+{
+	struct pfsyncreq preq;
+
+	bzero((char *)&preq, sizeof(struct pfsyncreq));
+	ifr.ifr_data = (caddr_t)&preq;
+
+	if (ioctl(s, SIOCGETPFSYNC, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGETPFSYNC");
+
+	bzero((char *)&preq.pfsyncr_syncif, sizeof(preq.pfsyncr_syncif));
+
+	if (ioctl(s, SIOCSETPFSYNC, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSETPFSYNC");
+}
+
+void
+setpfsync_maxupd(const char *val, int d, int s, const struct afswtch *rafp)
+{
+	int maxupdates;
+	struct pfsyncreq preq;
+
+	maxupdates = atoi(val);
+
+	memset((char *)&preq, 0, sizeof(struct pfsyncreq));
+	ifr.ifr_data = (caddr_t)&preq;
+
+	if (ioctl(s, SIOCGETPFSYNC, (caddr_t)&ifr) == -1)
+		err(1, "SIOCGETPFSYNC");
+
+	preq.pfsyncr_maxupdates = maxupdates;
+
+	if (ioctl(s, SIOCSETPFSYNC, (caddr_t)&ifr) == -1)
+		err(1, "SIOCSETPFSYNC");
+}
+
+void
+pfsync_status(int s, const struct rt_addrinfo *info __unused)
+{
+	struct pfsyncreq preq;
+
+	bzero((char *)&preq, sizeof(struct pfsyncreq));
+	ifr.ifr_data = (caddr_t)&preq;
+
+	if (ioctl(s, SIOCGETPFSYNC, (caddr_t)&ifr) == -1)
+		return;
+
+	if (preq.pfsyncr_syncif[0] != '\0') {
+		printf("\tpfsync: syncif: %s maxupd: %d\n",
+		    preq.pfsyncr_syncif, preq.pfsyncr_maxupdates);
+	}
+}
+
+static struct cmd pfsync_cmds[] = {
+	DEF_CMD_ARG("syncif",		setpfsync_syncif),
+	DEF_CMD_ARG("maxupd",		setpfsync_maxupd),
+	DEF_CMD("-syncif",	1,	unsetpfsync_syncif),
+};
+static struct afswtch af_pfsync = {
+	.af_name	= "af_pfsync",
+	.af_af		= AF_UNSPEC,
+	.af_status	= pfsync_status,
+};
+
+static __constructor void
+pfsync_ctor(void)
+{
+#define	N(a)	(sizeof(a) / sizeof(a[0]))
+	int i;
+
+	for (i = 0; i < N(pfsync_cmds);  i++)
+		cmd_register(&pfsync_cmds[i]);
+	af_register(&af_pfsync);
+#undef N
+}