This patch changes ospfd from only listening mode for BFD status updates to interactive mode of dynamically registering/deregistering neighbors discovered on BFD enabled interfaces with PTM/BFD through zebra. Neighbor is registered with BFD when 2-way adjacency is established and deregistered when adjacency goes down if the BFD is enabled on the interface through which the neighbor was discovered.

OSPF BFD command enhancement to configure BFD parameters (detect multiplier, min rx and min tx).
interface <if-name>
  ip ospf bfd <detect mult> <min rx> <min tx>

This patch also adds BFD support for IPv6 OSPF. ospf6d  will dynamically register/deregister IPv6 neighbors with BFD for monitoring the connectivity of the neighbor. Neighbor is registered with BFD when 2-way adjacency is established and deregistered when adjacency goes down if the BFD is enabled on the interface through which the neighbor was discovered.

OSPF6 BFD command added to configure BFD and parameters (detect multiplier, min rx and min tx).
interface <if-name>
  ipv6 ospf6 bfd <detect mult> <min rx> <min tx>

Signed-off-by: Radhika Mahankali <radhika@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>
Reviewed-by:   Kanna Rajagopal <kanna@cumulusnetworks.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/lib/bfd.h b/lib/bfd.h
new file mode 100644
index 000000000..6ad1868dc
--- /dev/null
+++ b/lib/bfd.h
@@ -0,0 +1,77 @@
+/**
+ * bfd.h: BFD definitions and structures
+ *
+ * @copyright Copyright (C) 2015 Cumulus Networks, Inc.
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_BFD_H
+#define _ZEBRA_BFD_H
+
+#define BFD_CMD_DETECT_MULT_RANGE "<2-255> "
+#define BFD_CMD_MIN_RX_RANGE "<50-60000> "
+#define BFD_CMD_MIN_TX_RANGE "<50-60000>"
+
+#define BFD_DEF_MIN_RX 300
+#define BFD_MIN_MIN_RX 50
+#define BFD_MAX_MIN_RX 60000
+#define BFD_DEF_MIN_TX 300
+#define BFD_MIN_MIN_TX 50
+#define BFD_MAX_MIN_TX 60000
+#define BFD_DEF_DETECT_MULT 3
+#define BFD_MIN_DETECT_MULT 2
+#define BFD_MAX_DETECT_MULT 255
+
+#define BFD_FLAG_PARAM_CFG (1 << 0) /* parameters have been configured */
+#define BFD_FLAG_BFD_REG   (1 << 1) /* Peer registered with BFD */
+
+struct bfd_info
+{
+  u_int16_t flags;
+  u_int8_t  detect_mult;
+  u_int32_t desired_min_tx;
+  u_int32_t required_min_rx;
+};
+
+extern struct bfd_info *
+bfd_info_create(void);
+
+extern void
+bfd_info_free(void **bfd_info);
+
+extern int
+bfd_validate_param(struct vty *vty, const char *dm_str, const char *rx_str,
+                   const char *tx_str, u_int8_t *dm_val, u_int32_t *rx_val,
+                   u_int32_t *tx_val);
+
+extern void
+bfd_set_param (struct bfd_info **bfd_info, u_int32_t min_rx, u_int32_t min_tx,
+               u_int8_t detect_mult, int defaults, int *command);
+extern void
+bfd_peer_sendmsg (struct zclient *zclient, struct bfd_info *bfd_info,
+                  int family, void *dst_ip, void *src_ip, char *if_name,
+                  int ttl, int multihop, int command, int set_flag);
+
+extern const char *
+bfd_get_command_dbg_str(int command);
+
+extern struct interface *
+bfd_get_peer_info (struct stream *s, struct prefix *dp, struct prefix *sp);
+
+#endif /* _ZEBRA_BFD_H */