BFD: Allow per-request session options

BFD session options are configured per interface in BFD protocol. This
patch allows to specify them also per-request in protocols requesting
sessions (currently limited to BGP).

1 files changed, 20 insertions, 2 deletions

diff --git a/nest/bfd.h b/nest/bfd.h
index 36add991..37561266 100644
--- a/nest/bfd.h
+++ b/nest/bfd.h
@@ -9,9 +9,20 @@
 
 #include "lib/lists.h"
 #include "lib/resource.h"
+#include "conf/conf.h"
 
 struct bfd_session;
 
+struct bfd_options {
+  u32 min_rx_int;
+  u32 min_tx_int;
+  u32 idle_tx_int;
+  u8 multiplier;
+  u8 passive;
+  u8 passive_set;
+  u8 mode;
+};
+
 struct bfd_request {
   resource r;
   node n;
@@ -20,6 +31,7 @@ struct bfd_request {
   ip_addr local;
   struct iface *iface;
   struct iface *vrf;
+  struct bfd_options opts;
 
   void (*hook)(struct bfd_request *);
   void *data;
@@ -32,6 +44,7 @@ struct bfd_request {
   u8 down;
 };
 
+#define BGP_BFD_GRACEFUL	2	/* BFD down triggers graceful restart */
 
 #define BFD_STATE_ADMIN_DOWN	0
 #define BFD_STATE_DOWN		1
@@ -39,15 +52,20 @@ struct bfd_request {
 #define BFD_STATE_UP		3
 
 
+static inline struct bfd_options * bfd_new_options(void)
+{ return cfg_allocz(sizeof(struct bfd_options)); }
+
 #ifdef CONFIG_BFD
 
-struct bfd_request * bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface, struct iface *vrf, void (*hook)(struct bfd_request *), void *data);
+struct bfd_request * bfd_request_session(pool *p, ip_addr addr, ip_addr local, struct iface *iface, struct iface *vrf, void (*hook)(struct bfd_request *), void *data, const struct bfd_options *opts);
+void bfd_update_request(struct bfd_request *req, const struct bfd_options *opts);
 
 static inline void cf_check_bfd(int use UNUSED) { }
 
 #else
 
-static inline struct bfd_request * bfd_request_session(pool *p UNUSED, ip_addr addr UNUSED, ip_addr local UNUSED, struct iface *iface UNUSED, struct iface *vrf UNUSED, void (*hook)(struct bfd_request *) UNUSED, void *data UNUSED) { return NULL; }
+static inline struct bfd_request * bfd_request_session(pool *p UNUSED, ip_addr addr UNUSED, ip_addr local UNUSED, struct iface *iface UNUSED, struct iface *vrf UNUSED, void (*hook)(struct bfd_request *) UNUSED, void *data UNUSED, const struct bfd_options *opts UNUSED) { return NULL; }
+static inline void bfd_update_request(struct bfd_request *req UNUSED, const struct bfd_options *opts UNUSED) { };
 
 static inline void cf_check_bfd(int use) { if (use) cf_error("BFD not available"); }