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diff --git a/wsutil/crc16.h b/wsutil/crc16.h
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+/** @file
+ * Declaration of CRC-16 routines and table
+ *
+ * 2004 Richard van der Hoff <richardv@mxtelecom.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+*/
+
+#ifndef __CRC16_H__
+#define __CRC16_H__
+
+#include <wireshark.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Calculate the CCITT/ITU/CRC-16 16-bit CRC
+
+   (parameters for this CRC are:
+       Polynomial: x^16 + x^12 + x^5 + 1  (0x1021);
+       Start value 0xFFFF;
+       XOR result with 0xFFFF;
+       First bit is LSB)
+*/
+
+/** Compute CRC16 CCITT checksum of a buffer of data.
+ @param buf The buffer containing the data.
+ @param len The number of bytes to include in the computation.
+ @return The CRC16 CCITT checksum. */
+WS_DLL_PUBLIC uint16_t crc16_ccitt(const uint8_t *buf, unsigned len);
+
+/** Compute CRC16 X.25 CCITT checksum of a buffer of data.
+ @param buf The buffer containing the data.
+ @param len The number of bytes to include in the computation.
+ @return The CRC16 X.25 CCITT checksum. */
+WS_DLL_PUBLIC uint16_t crc16_x25_ccitt_seed(const uint8_t *buf, unsigned len, uint16_t seed);
+
+/** Compute CRC16 CCITT checksum of a buffer of data.  If computing the
+ *  checksum over multiple buffers and you want to feed the partial CRC16
+ *  back in, remember to take the 1's complement of the partial CRC16 first.
+ @param buf The buffer containing the data.
+ @param len The number of bytes to include in the computation.
+ @param seed The seed to use.
+ @return The CRC16 CCITT checksum (using the given seed). */
+WS_DLL_PUBLIC uint16_t crc16_ccitt_seed(const uint8_t *buf, unsigned len, uint16_t seed);
+
+/** Compute the 16bit CRC_A value of a buffer as defined in ISO14443-3.
+ @param buf The buffer containing the data.
+ @param len The number of bytes to include in the computation.
+ @return the CRC16 checksum for the buffer */
+WS_DLL_PUBLIC uint16_t crc16_iso14443a(const uint8_t *buf, unsigned len);
+
+/** Compute the 16bit CRC value of a buffer as defined in USB Specification.
+ @param buf The buffer containing the data.
+ @param len The number of bytes to include in the computation.
+ @return the CRC16 checksum for the buffer */
+WS_DLL_PUBLIC uint16_t crc16_usb(const uint8_t *buf, unsigned len);
+
+/** Calculates a CRC16 checksum for the given buffer with the polynom
+ *  0x5935 using a precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC16 checksum for the buffer
+ */
+WS_DLL_PUBLIC uint16_t crc16_0x5935(const uint8_t *buf, uint32_t len, uint16_t seed);
+
+/** Calculates a CRC16 checksum for the given buffer with the polynom
+ *  0x755B using a precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC16 checksum for the buffer
+ */
+WS_DLL_PUBLIC uint16_t crc16_0x755B(const uint8_t *buf, uint32_t len, uint16_t seed);
+
+/** Computes CRC16 checksum for the given data with the polynom 0x9949 using
+ *  precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC16 checksum for the buffer
+ */
+WS_DLL_PUBLIC uint16_t crc16_0x9949_seed(const uint8_t *buf, unsigned len, uint16_t seed);
+
+/** Computes CRC16 checksum for the given data with the polynom 0x3D65 using
+ *  precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC16 checksum for the buffer
+ */
+WS_DLL_PUBLIC uint16_t crc16_0x3D65_seed(const uint8_t *buf, unsigned len, uint16_t seed);
+
+/** Computes CRC16 checksum for the given data with the polynom 0x080F using
+ *  precompiled CRC table
+ * @param buf a pointer to a buffer of the given length
+ * @param len the length of the given buffer
+ * @param seed The seed to use.
+ * @return the CRC16 checksum for the buffer
+ */
+WS_DLL_PUBLIC uint16_t crc16_0x080F_seed(const uint8_t *buf, unsigned len, uint16_t seed);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* crc16.h */