Support struct tunnel

src/packet/packet_layer.cpp

@@ -1,23 +1,16 @@
 #include "packet_priv.h"
+#include "packet_utils.h"
 
 int packet_get_layer(const struct packet *pkt, int idx, struct layer *out)
 {
-    if (pkt == NULL || out == NULL)
+    const struct raw_layer *raw = packet_get_raw_layer(pkt, idx);
+    if (raw == NULL)
     {
         return -1;
     }
-
-    if (idx < 0 || idx >= pkt->layers_used)
+    else
     {
-        return -1;
+        layer_convert(raw, out);
+        return 0;
     }
-
-    const struct raw_layer *raw = &pkt->layers[idx];
-    out->proto = raw->proto;
-    out->header_len = raw->hdr_len;
-    out->payload_len = raw->pld_len;
-    out->header.raw = raw->hdr_ptr;
-    out->payload = raw->pld_ptr;
-
-    return 0;
 }