TunnelEncaps: Initial commit

Filter: TLV
Filter: support multiple TLVs
Filter: clean unused build_tunnel_encap and calc_tunnel_encap
Filter: replace te_format_tlvlist using format visitor
Filter: add af to ep subtlv
Filter: define tlvlist_calc_tunnel_encap_new and tlvlist_decode_tunnel_encap
Filter: use tlvlist_calc_tunnel_encap_new
Filter: add visit_tlv_end and visit_subtlv_end
Filter: use visitor in EA_SET
Filter: use vistor in EA_SET
Filter: add tlvlist_same fixes configure free peer

Generalize tunnel encapsulation
Add struct tunnel_encap
Improve format function
Add tunnel type names
Add cloud security tunnel type
Update tunnel types
Add addess family
Replace log with DBG
Add format callback
Add wireguard peer key to tunnel encap format
Move wireguard formatting from tunnel_encaps library
Change from eattr to adata in decode and format
Support multiple TLVs
Use visitor pattern
Use visitor in wireguard
Remove decode_tunnel_encap
Replace te_format_tlvlist using format visitor
Remove unused structs
Use AFI_IPV4+6
Add visit_tlv_end and visit_subtlv_end
Remove debug
Fix format encap + ep
Register encap name

Filter: Simplify TLV

Remove some reserved keywords: TUNNEL_ENCAP, TUNNEL_ENDPOINT,
UDP_DEST_PORT, and COLOR
Support unknown sub-TLV.

Filter: Clean up
Clean up unused functions and structs.
Filter: replace asn with reserved in ep.
Filter: Remove unused T_TLV
Filter: Clean up commented code
Filter: Remove unused empty set
Filter: Refactor encoder
Filter: Refactor tlvlist
Filter: Implement unknown cmp
Filter: Simplify encoding
Filter: Add EA_GET
Filter: Fix indent

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_ */