TunnelEncaps: Initial commit

1 files changed, 63 insertions, 0 deletions

diff --git a/lib/tunnel_encaps.h b/lib/tunnel_encaps.h
new file mode 100644
index 00000000..fc7bbda6
--- /dev/null
+++ b/lib/tunnel_encaps.h
@@ -0,0 +1,63 @@
+#ifndef _BIRD_TUNNEL_ENCAPS_
+#define _BIRD_TUNNEL_ENCAPS_
+
+#include "nest/attrs.h"
+#include "nest/route.h"
+
+#define BA_TUNNEL_ENCAP		0x17
+
+#define BGP_TUNNEL_ENCAP_A_SUB_TLV_ENCAP         1
+#define BGP_TUNNEL_ENCAP_A_SUB_TLV_COLOR         4
+#define BGP_TUNNEL_ENCAP_A_SUB_TLV_TUNNEL_EP     6
+#define BGP_TUNNEL_ENCAP_A_SUB_TLV_UDP_DEST_PORT 8
+
+#define FLAG_BGP_TUNNEL_ENCAP_A_SUB_TLV_ENCAP         (1<<BGP_TUNNEL_ENCAP_A_SUB_TLV_ENCAP)
+#define FLAG_BGP_TUNNEL_ENCAP_A_SUB_TLV_COLOR         (1<<BGP_TUNNEL_ENCAP_A_SUB_TLV_COLOR)
+#define FLAG_BGP_TUNNEL_ENCAP_A_SUB_TLV_TUNNEL_EP     (1<<BGP_TUNNEL_ENCAP_A_SUB_TLV_TUNNEL_EP)
+#define FLAG_BGP_TUNNEL_ENCAP_A_SUB_TLV_UDP_DEST_PORT (1<<BGP_TUNNEL_ENCAP_A_SUB_TLV_UDP_DEST_PORT)
+
+struct te_context {
+  void *opaque;
+  const byte *sub_tlvs_pos;
+  uint sub_tlvs_len;
+};
+
+struct te_visitor {
+  int (*visit_tlv)(int type, struct te_context *ctx);
+  int (*visit_tlv_end)(struct te_context *ctx);
+  int (*visit_subtlv)(int type, struct te_context *ctx);
+  int (*visit_subtlv_end)(int type, struct te_context *ctx);
+  int (*visit_encap)(const struct te_encap *encap, struct te_context *ctx);
+  int (*visit_ep)(const struct te_endpoint *ep, struct te_context *ctx);
+  int (*visit_color)(u32 color, struct te_context *ctx);
+  int (*visit_udp_dest_port)(u16 port, struct te_context *ctx);
+  int (*visit_unknown)(int type, const struct te_unknown *unknown, struct te_context *ctx);
+};
+
+struct te_buffer {
+  byte *pos;
+  uint size;
+  int tlv;
+  int tlv_type;
+  int subtlv;
+};
+
+struct tlv_buffer;
+
+typedef int (*format_tunnel_encap_fn)(const struct te_encap *, byte *buf, uint size);
+
+void tunnel_encap_init(void);
+int walk_tunnel_encap(const struct adata *a, const struct te_visitor *visitor, void *opaque);
+int te_count_subtlvs(struct te_context *ctx);
+
+const struct te_visitor *te_get_format_visitor(void);
+int format_tunnel_encap(const struct adata *a, byte *buf, uint size);
+
+const struct te_visitor *te_get_encode_visitor(void);
+int te_init_encode_visitor(struct tlv_buffer *buf, byte *p, uint size);
+uint te_get_encode_length(struct tlv_buffer *buf);
+
+void register_format_tunnel_encap(int type, const char *name, format_tunnel_encap_fn cb);
+void unregister_format_tunnel_encap(int type, format_tunnel_encap_fn cb);
+
+#endif	/* _BIRD_TUNNEL_ENCAPS_ */