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)

1 files changed, 144 insertions, 0 deletions

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
+}