vrrpd: initial commit

Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/vrrpd/vrrp_packet.c b/vrrpd/vrrp_packet.c
new file mode 100644
index 0000000000..4cbcd771f2
--- /dev/null
+++ b/vrrpd/vrrp_packet.c
@@ -0,0 +1,50 @@
+/*
+ * VRRPD packet crafting
+ * Copyright (C) 2018 Cumulus Networks, Inc.
+ *               Quentin Young
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <zebra.h>
+
+#include "memory.h"
+#include "ipaddr.h"
+
+#include "vrrp_packet.h"
+
+/*
+ * Builds a VRRP packet.
+ */
+struct vrrp_pkt *vrrp_pkt_build(uint8_t vrid, uint8_t prio,
+				uint16_t max_adver_int, bool v6, uint8_t numip,
+				void **ips)
+{
+	size_t addrsz = v6 ? sizeof(struct in6_addr) : sizeof(struct in_addr);
+	struct vrrp_pkt *pkt =
+		XCALLOC(MTYPE_TMP, sizeof(struct vrrp_pkt) + addrsz * numip);
+
+	pkt->version = VRRP_VERSION;
+	pkt->type = VRRP_TYPE_ADVERTISEMENT;
+	pkt->vrid = vrid;
+	pkt->priority = prio;
+	pkt->rsvd = 0;
+	pkt->max_adver_int = max_adver_int;
+	for (uint8_t i = 0; i < numip; i++)
+		memcpy(&pkt->addrs[i].v4, ips[i], addrsz);
+	/* FIXME */
+	pkt->cksum = 0;
+
+	return pkt;
+}