Packet - Add mpls field

Author: BonnyAD9

include/ipfixprobe/packet.hpp

@@ -70,6 +70,17 @@ struct Packet : public Record {
    uint32_t    tcp_seq;
    uint32_t    tcp_ack;
 
+   /**
+    * @brief The top level mpls
+    *
+    * Contents are (from MSb to LSb):
+    *   20-bit - Label,
+    *   3-bit  - Traffic class / EXP,
+    *   1-bit  - Bottom of stack (true if last),
+    *   8-bit  - TTL (Time To Live)
+    */
+   uint32_t    mplsTop;
+
    const uint8_t *packet; /**< Pointer to begin of packet, if available */
    uint16_t    packet_len; /**< Length of data in packet buffer, packet_len <= packet_len_wire */
    uint16_t    packet_len_wire; /**< Original packet length on wire */
@@ -96,7 +107,7 @@ struct Packet : public Record {
       ip_len(0), ip_payload_len(0), ip_version(0), ip_ttl(0),
       ip_proto(0), ip_tos(0), ip_flags(0), src_ip({0}), dst_ip({0}), vlan_id(0),
       src_port(0), dst_port(0), tcp_flags(0), tcp_window(0),
-      tcp_options(0), tcp_mss(0), tcp_seq(0), tcp_ack(0),
+      tcp_options(0), tcp_mss(0), tcp_seq(0), tcp_ack(0), mplsTop(0),
       packet(nullptr), packet_len(0), packet_len_wire(0),
       payload(nullptr), payload_len(0), payload_len_wire(0),
       custom(nullptr), custom_len(0),