+struct NF_HEADER {
+ uint16_t version; // Protocol version
+ uint16_t count; // Flows count
+ uint32_t uptime; // System uptime
+ uint32_t timestamp; // UNIX timestamp
+ uint32_t nsecs; // Residual nanoseconds
+ uint32_t flowSeq; // Sequence counter
+ uint8_t eType; // Engine type
+ uint8_t eID; // Engine ID
+ uint16_t sInterval; // Sampling mode and interval
+};
+
+struct NF_DATA {
+ uint32_t srcAddr; // Flow source address
+ uint32_t dstAddr; // Flow destination address
+ uint32_t nextHop; // IP addres on next hop router
+ uint16_t inSNMP; // SNMP index of input iface
+ uint16_t outSNMP; // SNMP index of output iface
+ uint32_t packets; // Packets in flow
+ uint32_t octets; // Total number of bytes in flow
+ uint32_t timeStart; // Uptime on first packet in flow
+ uint32_t timeFinish;// Uptime on last packet in flow
+ uint16_t srcPort; // Flow source port
+ uint16_t dstPort; // Flow destination port
+ uint8_t pad1; // 1-byte padding
+ uint8_t TCPFlags; // Cumulative OR of TCP flags
+ uint8_t proto; // IP protocol type (tcp, udp, etc.)
+ uint8_t tos; // IP Type of Service (ToS)
+ uint16_t srcAS; // Source BGP autonomous system number
+ uint16_t dstAS; // Destination BGP autonomus system number
+ uint8_t srcMask; // Source address mask in "slash" notation
+ uint8_t dstMask; // Destination address mask in "slash" notation
+ uint16_t pad2; // 2-byte padding
+};
+
+#define BUF_SIZE (sizeof(NF_HEADER) + 30 * sizeof(NF_DATA))
+
+}