* new Packet type: PAYLOAD_TYPE_TRACE

src/Packet.h

@@ -25,6 +25,7 @@ namespace mesh {
 #define PAYLOAD_TYPE_GRP_DATA    0x06    // an (unverified) group datagram (prefixed with channel hash, MAC) (enc data: timestamp, blob)
 #define PAYLOAD_TYPE_ANON_REQ    0x07    // generic request (prefixed with dest_hash, ephemeral pub_key, MAC) (enc data: ...)
 #define PAYLOAD_TYPE_PATH        0x08    // returned path (prefixed with dest/src hashes, MAC) (enc data: path, extra)
+#define PAYLOAD_TYPE_TRACE       0x09    // trace a path, collecting SNI for each hop
 //...
 #define PAYLOAD_TYPE_RESERVEDM   0x0F    // FUTURE
 
@@ -44,6 +45,7 @@ public:
   uint16_t payload_len, path_len;
   uint8_t path[MAX_PATH_SIZE];
   uint8_t payload[MAX_PACKET_PAYLOAD];
+  float _snr;
 
   /**
    * \brief calculate the hash of payload + type
@@ -72,6 +74,8 @@ public:
   void markDoNotRetransmit() { header = 0xFF; }
   bool isMarkedDoNotRetransmit() const { return header == 0xFF; }
 
+  float getSNR() const { return _snr; }
+
   /**
    * \brief  save entire packet as a blob
    * \param dest  (OUT) destination buffer (assumed to be MAX_MTU_SIZE)