BMP protocol support

Initial implementation of a basic subset of the BMP (BGP Monitoring
Protocol, RFC 7854) from Akamai team. Submitted for further review
and improvement.

1 files changed, 70 insertions, 0 deletions

diff --git a/proto/bmp/map.h b/proto/bmp/map.h
new file mode 100644
index 00000000..e9d5798e
--- /dev/null
+++ b/proto/bmp/map.h
@@ -0,0 +1,70 @@
+/*
+ *	BIRD -- The BGP Monitoring Protocol (BMP)
+ *
+ *	(c) 2020 Akamai Technologies, Inc. (Pawel Maslanka, pmaslank@akamai.com)
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+/**
+ * This map implementation binds peer IP address as container key with custom data.
+ */
+#ifndef _BIRD_BMP_MAP_H_
+#define _BIRD_BMP_MAP_H_
+
+#include "nest/bird.h"
+#include "lib/hash.h"
+#include "lib/resource.h"
+
+#include "proto/bmp/utils.h"
+
+struct bmp_peer_map_key {
+  struct bmp_peer_map_key *next;
+  ip_addr peer_ip;
+  u32 peer_as;
+};
+
+struct bmp_peer_map_data {
+  void *buf;
+  size_t buf_size;
+};
+
+struct bmp_peer_map_entry {
+  struct bmp_peer_map_key key;
+  struct bmp_peer_map_data data;
+};
+
+struct bmp_peer_map {
+  pool *mpool;                             // Memory pool for peer entries in peer_hash
+  HASH(struct bmp_peer_map_key) peer_hash; // Hash for peers to find the index
+};
+
+enum bmp_result
+bmp_peer_map_init(struct bmp_peer_map *map, pool *mpool);
+
+struct bmp_peer_map_key
+bmp_peer_map_key_create(const ip_addr peer_ip, const u32 peer_as);
+
+enum bmp_result
+bmp_peer_map_free(struct bmp_peer_map *map);
+
+enum bmp_result
+bmp_peer_map_flush(struct bmp_peer_map *map);
+
+enum bmp_result
+bmp_peer_map_insert(struct bmp_peer_map *map, const struct bmp_peer_map_key key,
+  const byte *data, const size_t data_size);
+
+enum bmp_result
+bmp_peer_map_remove(struct bmp_peer_map *map, const struct bmp_peer_map_key key);
+
+const struct bmp_peer_map_entry *
+bmp_peer_map_get(struct bmp_peer_map *map, const struct bmp_peer_map_key key);
+
+typedef void (*bmp_peer_map_walk_action)(const struct bmp_peer_map_key key,
+          const byte *data, const size_t data_size);
+
+void
+bmp_peer_map_walk(const struct bmp_peer_map *map, bmp_peer_map_walk_action action);
+
+#endif /* _BIRD_BMP_MAP_H_ */