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diff --git a/lib/lufa/Projects/Webserver/Lib/DHCPCommon.c b/lib/lufa/Projects/Webserver/Lib/DHCPCommon.c
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+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2017.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaims all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * Common DHCP routines to manage DHCP packet data.
+ */
+
+#include "DHCPCommon.h"
+
+#if defined(ENABLE_DHCP_CLIENT) || defined(ENABLE_DHCP_SERVER) || defined(__DOXYGEN__)
+
+/** Sets the given DHCP option in the DHCP packet's option list. This automatically moves the
+ * end of options terminator past the new option in the options list.
+ *
+ * \param[in,out] DHCPOptionList Pointer to the start of the DHCP packet's options list
+ * \param[in] Option DHCP option to add to the list
+ * \param[in] DataLen Size in bytes of the option data to add
+ * \param[in] OptionData Buffer where the option's data is to be sourced from
+ *
+ * \return Number of bytes added to the DHCP packet
+ */
+uint8_t DHCPCommon_SetOption(uint8_t* DHCPOptionList,
+ const uint8_t Option,
+ const uint8_t DataLen,
+ void* const OptionData)
+{
+ /* Skip through the DHCP options list until the terminator option is found */
+ while (*DHCPOptionList != DHCP_OPTION_END)
+ DHCPOptionList += (DHCPOptionList[1] + 2);
+
+ /* Overwrite the existing terminator with the new option, add a new terminator at the end of the list */
+ DHCPOptionList[0] = Option;
+ DHCPOptionList[1] = DataLen;
+ memcpy(&DHCPOptionList[2], OptionData, DataLen);
+ DHCPOptionList[2 + DataLen] = DHCP_OPTION_END;
+
+ /* Calculate the total number of bytes added to the outgoing packet */
+ return (2 + DataLen);
+}
+
+/** Retrieves the given option's data (if present) from the DHCP packet's options list.
+ *
+ * \param[in,out] DHCPOptionList Pointer to the start of the DHCP packet's options list
+ * \param[in] Option DHCP option to retrieve to the list
+ * \param[out] Destination Buffer where the option's data is to be written to if found
+ *
+ * \return Boolean \c true if the option was found in the DHCP packet's options list, \c false otherwise
+ */
+bool DHCPCommon_GetOption(const uint8_t* DHCPOptionList,
+ const uint8_t Option,
+ void* const Destination)
+{
+ /* Look through the incoming DHCP packet's options list for the requested option */
+ while (*DHCPOptionList != DHCP_OPTION_END)
+ {
+ /* Check if the current DHCP option in the packet is the one requested */
+ if (DHCPOptionList[0] == Option)
+ {
+ /* Copy request option's data to the destination buffer */
+ memcpy(Destination, &DHCPOptionList[2], DHCPOptionList[1]);
+
+ /* Indicate that the requested option data was successfully retrieved */
+ return true;
+ }
+
+ /* Skip to next DHCP option in the options list */
+ DHCPOptionList += (DHCPOptionList[1] + 2);
+ }
+
+ /* Requested option not found in the incoming packet's DHCP options list */
+ return false;
+}
+
+#endif
+