refactor: packet module (split to parse/build/layer/tunnel/utils)

src/packet/packet_def.h

@@ -0,0 +1,62 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include "stellar/layer.h"
+#include "stellar/packet.h"
+
+#define PACKET_MAX_LAYERS 32
+
+#define MAX_ROUTE_CTX 64
+struct route_ctx
+{
+    char data[MAX_ROUTE_CTX];
+    int used;
+};
+
+struct metadata
+{
+    struct route_ctx route_ctx;
+    struct sids sids;
+
+    uint64_t session_id;
+    uint64_t domain_id;
+    uint16_t link_id;
+    int is_ctrl;
+
+    enum packet_direction direction;
+    enum packet_action action;
+    const void *origin_ctx;
+};
+
+struct raw_layer
+{
+    enum layer_proto proto;
+    const char *hdr_ptr; // header pointer
+    const char *pld_ptr; // payload pointer
+    uint16_t hdr_offset; // header offset from data_ptr
+    uint16_t hdr_len;    // header length
+    uint16_t pld_len;    // payload length
+};
+
+struct packet
+{
+    struct raw_layer layers[PACKET_MAX_LAYERS];
+    struct raw_layer *frag_layer; // fragment layer
+    int8_t layers_used;
+    int8_t layers_size;
+    int8_t need_free;
+
+    const char *data_ptr;
+    uint16_t data_len;
+    uint16_t trim_len; // trim eth padding
+
+    struct metadata meta;
+};
+
+#ifdef __cplusplus
+}
+#endif