From 1ec522538fb81a56b068c087d0a842faf7aa7869 Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Tue, 19 Nov 2013 22:33:48 +0100
Subject: BFD protocol, ready for release.

Supports OSPF and BGP and also statically configured sessions.
---
 proto/bfd/config.Y | 82 ++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 52 insertions(+), 30 deletions(-)

(limited to 'proto/bfd/config.Y')

diff --git a/proto/bfd/config.Y b/proto/bfd/config.Y
index f1193d70..1bf8764f 100644
--- a/proto/bfd/config.Y
+++ b/proto/bfd/config.Y
@@ -12,20 +12,21 @@ CF_HDR
 CF_DEFINES
 
 #define BFD_CFG ((struct bfd_config *) this_proto)
-#define BFD_SESSION this_bfd_session
+#define BFD_IFACE ((struct bfd_iface_config *) this_ipatt)
 #define BFD_NEIGHBOR this_bfd_neighbor
 
-static struct bfd_session_config *this_bfd_session;
 static struct bfd_neighbor *this_bfd_neighbor;
 
+extern struct bfd_config *bfd_cf;
 
 CF_DECLS
 
-CF_KEYWORDS(BFD, MIN, IDLE, RX, TX, INTERVAL, MULTIPLIER, MULTIHOP, PASSIVE,
-	NEIGHBOR, DEV)
+CF_KEYWORDS(BFD, MIN, IDLE, RX, TX, INTERVAL, MULTIPLIER, PASSIVE,
+	INTERFACE, MULTIHOP, NEIGHBOR, DEV, LOCAL)
 
 %type <iface> bfd_neigh_iface
 %type <a> bfd_neigh_local
+%type <i> bfd_neigh_multihop
 
 CF_GRAMMAR
 
@@ -34,12 +35,19 @@ CF_ADDTO(proto, bfd_proto)
 bfd_proto_start: proto_start BFD
 {
   this_proto = proto_config_new(&proto_bfd, sizeof(struct bfd_config), $1);
+  init_list(&BFD_CFG->patt_list);
   init_list(&BFD_CFG->neigh_list);
+
+  if (bfd_cf)
+    cf_error("Only one BFD instance allowed");
+  bfd_cf = BFD_CFG;
 };
 
 bfd_proto_item:
    proto_item
- | bfd_neighbor
+ | INTERFACE bfd_iface
+ | MULTIHOP bfd_multihop
+ | NEIGHBOR bfd_neighbor
  ;
 
 bfd_proto_opts:
@@ -51,38 +59,41 @@ bfd_proto:
    bfd_proto_start proto_name '{' bfd_proto_opts '}';
 
 
-bfd_session_start:
+bfd_iface_start:
 {
-  this_bfd_session = cfg_allocz(sizeof(struct bfd_session_config));
+  this_ipatt = cfg_allocz(sizeof(struct bfd_iface_config));
+  init_list(&this_ipatt->ipn_list);
 
-  BFD_SESSION->min_rx_int = BFD_DEFAULT_MIN_RX_INT;
-  BFD_SESSION->min_tx_int = BFD_DEFAULT_MIN_TX_INT;
-  BFD_SESSION->idle_tx_int = BFD_DEFAULT_IDLE_TX_INT;
-  BFD_SESSION->multiplier = BFD_DEFAULT_MULTIPLIER;
+  BFD_IFACE->min_rx_int = BFD_DEFAULT_MIN_RX_INT;
+  BFD_IFACE->min_tx_int = BFD_DEFAULT_MIN_TX_INT;
+  BFD_IFACE->idle_tx_int = BFD_DEFAULT_IDLE_TX_INT;
+  BFD_IFACE->multiplier = BFD_DEFAULT_MULTIPLIER;
 };
 
-bfd_session_item:
-   INTERVAL expr_us { BFD_SESSION->min_rx_int = BFD_SESSION->min_tx_int = $2; }
- | MIN RX INTERVAL expr_us { BFD_SESSION->min_rx_int = $4; }
- | MIN TX INTERVAL expr_us { BFD_SESSION->min_tx_int = $4; }
- | IDLE TX INTERVAL expr_us { BFD_SESSION->idle_tx_int = $4; }
- | MULTIPLIER expr { BFD_SESSION->multiplier = $2; }
- | MULTIHOP bool { BFD_SESSION->multihop = $2; }
- | PASSIVE bool { BFD_SESSION->passive = $2; }
+bfd_iface_item:
+   INTERVAL expr_us { BFD_IFACE->min_rx_int = BFD_IFACE->min_tx_int = $2; }
+ | MIN RX INTERVAL expr_us { BFD_IFACE->min_rx_int = $4; }
+ | MIN TX INTERVAL expr_us { BFD_IFACE->min_tx_int = $4; }
+ | IDLE TX INTERVAL expr_us { BFD_IFACE->idle_tx_int = $4; }
+ | MULTIPLIER expr { BFD_IFACE->multiplier = $2; }
+ | PASSIVE bool { BFD_IFACE->passive = $2; }
  ;
 
-bfd_session_opts:
+bfd_iface_opts:
    /* empty */
- | bfd_session_opts bfd_session_item ';'
+ | bfd_iface_opts bfd_iface_item ';'
  ;
 
-bfd_session_opt_list:
+bfd_iface_opt_list:
    /* empty */
- | '{' bfd_session_opts '}'
+ | '{' bfd_iface_opts '}'
  ;
 
-bfd_session: 
-   bfd_session_start bfd_session_opt_list;
+bfd_iface: bfd_iface_start iface_patt_list bfd_iface_opt_list
+{ add_tail(&BFD_CFG->patt_list, NODE this_ipatt); };
+
+bfd_multihop: bfd_iface_start bfd_iface_opt_list
+{ BFD_CFG->multihop = BFD_IFACE; };
 
 
 bfd_neigh_iface:
@@ -96,15 +107,26 @@ bfd_neigh_local:
  | LOCAL ipa { $$ = $2; }
  ;
 
-bfd_neighbor: NEIGHBOR ipa bfd_neigh_iface bfd_neigh_local bfd_session
+bfd_neigh_multihop:
+   /* empty */ { $$ = 0; }
+ | MULTIHOP bool { $$ = $2; }
+ ;
+
+bfd_neighbor: ipa bfd_neigh_iface bfd_neigh_local bfd_neigh_multihop
 {
   this_bfd_neighbor = cfg_allocz(sizeof(struct bfd_neighbor));
   add_tail(&BFD_CFG->neigh_list, NODE this_bfd_neighbor);
 
-  BFD_NEIGHBOR->addr = $2;
-  BFD_NEIGHBOR->local = $4;
-  BFD_NEIGHBOR->iface = $3;
-  BFD_NEIGHBOR->opts = BFD_SESSION;
+  BFD_NEIGHBOR->addr = $1;
+  BFD_NEIGHBOR->local = $3;
+  BFD_NEIGHBOR->iface = $2;
+  BFD_NEIGHBOR->multihop = $4;
+
+  if ($4 && $2)
+    cf_error("Neighbor cannot set both interface and multihop");
+
+  if ($4 && ipa_zero($3))
+    cf_error("Multihop neighbor requires specified local address");
 };
 
 
-- 
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