- add Pcap++ Windows build

pcappp/include/pcapplusplus/GeneralUtils.h

@@ -0,0 +1,55 @@
+#ifndef PCAPPP_GENERAL_UTILS
+#define PCAPPP_GENERAL_UTILS
+
+#include <string>
+#include <stdint.h>
+
+/// @file
+
+/**
+ * \namespace pcpp
+ * \brief The main namespace for the PcapPlusPlus lib
+ */
+namespace pcpp
+{
+	/**
+	 * Convert a byte array into a string of hex characters. For example: for the array { 0xaa, 0x2b, 0x10 } the string
+	 * "aa2b10" will be returned
+	 * @param[in] byteArr A byte array
+	 * @param[in] byteArrSize The size of the byte array [in bytes]
+	 * @param[in] stringSizeLimit An optional parameter that enables to limit the returned string size. If set to a positive
+	 * integer value the returned string size will be equal or less than this value. If the string representation of the
+	 * whole array is longer than this size then only part of the array will be read. The default value is -1 which means no
+	 * string size limitation
+	 * @return A string of hex characters representing the byte array
+	 */
+	std::string byteArrayToHexString(const uint8_t* byteArr, size_t byteArrSize, int stringSizeLimit = -1);
+
+	/**
+	 * Convert a string of hex characters into a byte array. For example: for the string "aa2b10" an array of values
+	 * { 0xaa, 0x2b, 0x10 } will be returned
+	 * @param[in] hexString A string of hex characters
+	 * @param[out] resultByteArr A pre-allocated byte array where the result will be written to
+	 * @param[in] resultByteArrSize The size of the pre-allocated byte array
+	 * @return The size of the result array. If the string represents an array that is longer than the pre-allocated size
+	 * (resultByteArrSize) then the result array will contain only the part of the string that managed to fit into the
+	 * array, and the returned size will be resultByteArrSize. However if the string represents an array that is shorter
+	 * than the pre-allocated size then some of the cells will remain empty and contain zeros, and the returned size will
+	 * be the part of the array that contain data. If the input is an illegal hex string 0 will be returned.
+	 * Illegal hex string means odd number of characters or a string that contains non-hex characters
+	 */
+	size_t hexStringToByteArray(const std::string& hexString, uint8_t* resultByteArr, size_t resultByteArrSize);
+
+	/**
+	 * This is a cross platform version of memmem (https://man7.org/linux/man-pages/man3/memmem.3.html) which is not supported
+	 * on all platforms.
+	 * @param[in] haystack A pointer to the buffer to be searched
+	 * @param[in] haystackLen Length of the haystack buffer
+	 * @param[in] needle A pointer to a buffer that will be searched for
+	 * @param[in] needleLen Length of the needle buffer
+	 * @return A pointer to the beginning of the substring, or NULL if the substring is not found
+	 */
+	char* cross_platform_memmem(const char* haystack, size_t haystackLen, const char* needle, size_t needleLen);
+}
+
+#endif // PCAPPP_GENERAL_UTILS