- add Pcap++ Windows build

pcappp/include/pcapplusplus/PacketUtils.h

@@ -0,0 +1,76 @@
+#ifndef PACKETPP_PACKET_UTILS
+#define PACKETPP_PACKET_UTILS
+
+#include "Packet.h"
+
+/// @file
+
+/**
+ * \namespace pcpp
+ * \brief The main namespace for the PcapPlusPlus lib
+ */
+namespace pcpp
+{
+	/**
+	 * A struct that represent a single buffer
+	 */
+	template<typename T>
+	struct ScalarBuffer
+	{
+		/**
+		 * The pointer to the buffer
+		 */
+		T* buffer;
+
+		/**
+		 * Buffer length
+		 */
+		size_t len;
+	};
+
+	/**
+	 * Computes the checksum for a vector of buffers
+	 * @param[in] vec The vector of buffers
+	 * @param[in] vecSize Number of ScalarBuffers in vector
+	 * @return The checksum result
+	 */
+	uint16_t computeChecksum(ScalarBuffer<uint16_t> vec[], size_t vecSize);
+
+	/**
+	 * Computes Fowler-Noll-Vo (FNV-1) 32bit hash function on an array of byte buffers. The hash is calculated on each
+	 * byte in each byte buffer, as if all byte buffers were one long byte buffer
+	 * @param[in] vec An array of byte buffers (ScalarBuffer of type uint8_t)
+	 * @param[in] vecSize The length of vec
+	 * @return The 32bit hash value
+	 */
+	uint32_t fnvHash(ScalarBuffer<uint8_t> vec[], size_t vecSize);
+
+	/**
+	 * Computes Fowler-Noll-Vo (FNV-1) 32bit hash function on a byte buffer
+	 * @param[in] buffer The byte buffer
+	 * @param[in] bufSize The size of the byte buffer
+	 * @return The 32bit hash value
+	 */
+	uint32_t fnvHash(uint8_t* buffer, size_t bufSize);
+
+	/**
+	 * A method that is given a packet and calculates a hash value by the packet's 5-tuple. Supports IPv4, IPv6,
+	 * TCP and UDP. For packets which doesn't have 5-tuple (for example: packets which aren't IPv4/6 or aren't
+	 * TCP/UDP) the value of 0 will be returned
+	 * @param[in] packet The packet to calculate hash for
+	 * @param[in] directionUnique Make hash value unique for each direction
+	 * @return The hash value calculated for this packet or 0 if the packet doesn't contain 5-tuple
+	 */
+	uint32_t hash5Tuple(Packet* packet, bool const& directionUnique = false);
+
+	/**
+	 * A method that is given a packet and calculates a hash value by the packet's 2-tuple (IP src + IP dst). Supports
+	 * IPv4 and IPv6. For packets which aren't IPv4/6 the value of 0 will be returned
+	 * @param[in] packet The packet to calculate hash for
+	 * @return The hash value calculated for this packet or 0 if the packet isn't IPv4/6
+	 */
+	uint32_t hash2Tuple(Packet* packet);
+
+} // namespace pcpp
+
+#endif /* PACKETPP_PACKET_UTILS */