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diff --git a/src/microhttpd/postprocessor.h b/src/microhttpd/postprocessor.h
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+/*
+     This file is part of libmicrohttpd
+     Copyright (C) 2007-2022 Daniel Pittman, Christian Grothoff, and Evgeny Grin
+
+     This library is free software; you can redistribute it and/or
+     modify it under the terms of the GNU Lesser General Public
+     License as published by the Free Software Foundation; either
+     version 2.1 of the License, or (at your option) any later version.
+
+     This library is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     Lesser General Public License for more details.
+
+     You should have received a copy of the GNU Lesser General Public
+     License along with this library; if not, write to the Free Software
+     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+/**
+ * @file postprocessor.h
+ * @brief  Declarations for parsing POST data
+ * @author Christian Grothoff
+ * @author Karlson2k (Evgeny Grin)
+ */
+
+#ifndef MHD_POSTPROCESSOR_H
+#define MHD_POSTPROCESSOR_H 1
+#include "internal.h"
+
+/**
+ * States in the PP parser's state machine.
+ */
+enum PP_State
+{
+  /* general states */
+  PP_Error,
+  PP_Done,
+  PP_Init,
+  PP_NextBoundary,
+
+  /* url encoding-states */
+  PP_ProcessKey,
+  PP_ProcessValue,
+  PP_Callback,
+
+  /* post encoding-states  */
+  PP_ProcessEntryHeaders,
+  PP_PerformCheckMultipart,
+  PP_ProcessValueToBoundary,
+  PP_PerformCleanup,
+
+  /* nested post-encoding states */
+  PP_Nested_Init,
+  PP_Nested_PerformMarking,
+  PP_Nested_ProcessEntryHeaders,
+  PP_Nested_ProcessValueToBoundary,
+  PP_Nested_PerformCleanup
+
+};
+
+
+enum RN_State
+{
+  /**
+   * No RN-preprocessing in this state.
+   */
+  RN_Inactive = 0,
+
+  /**
+   * If the next character is CR, skip it.  Otherwise,
+   * just go inactive.
+   */
+  RN_OptN = 1,
+
+  /**
+   * Expect LFCR (and only LFCR).  As always, we also
+   * expect only LF or only CR.
+   */
+  RN_Full = 2,
+
+  /**
+   * Expect either LFCR or '--'LFCR.  If '--'LFCR, transition into dash-state
+   * for the main state machine
+   */
+  RN_Dash = 3,
+
+  /**
+   * Got a single dash, expect second dash.
+   */
+  RN_Dash2 = 4
+};
+
+
+/**
+ * Bits for the globally known fields that
+ * should not be deleted when we exit the
+ * nested state.
+ */
+enum NE_State
+{
+  NE_none = 0,
+  NE_content_name = 1,
+  NE_content_type = 2,
+  NE_content_filename = 4,
+  NE_content_transfer_encoding = 8
+};
+
+
+/**
+ * Internal state of the post-processor.  Note that the fields
+ * are sorted by type to enable optimal packing by the compiler.
+ */
+struct MHD_PostProcessor
+{
+
+  /**
+   * The connection for which we are doing
+   * POST processing.
+   */
+  struct MHD_Connection *connection;
+
+  /**
+   * Function to call with POST data.
+   */
+  MHD_PostDataIterator ikvi;
+
+  /**
+   * Extra argument to ikvi.
+   */
+  void *cls;
+
+  /**
+   * Encoding as given by the headers of the connection.
+   */
+  const char *encoding;
+
+  /**
+   * Primary boundary (points into encoding string)
+   */
+  const char *boundary;
+
+  /**
+   * Nested boundary (if we have multipart/mixed encoding).
+   */
+  char *nested_boundary;
+
+  /**
+   * Pointer to the name given in disposition.
+   */
+  char *content_name;
+
+  /**
+   * Pointer to the (current) content type.
+   */
+  char *content_type;
+
+  /**
+   * Pointer to the (current) filename.
+   */
+  char *content_filename;
+
+  /**
+   * Pointer to the (current) encoding.
+   */
+  char *content_transfer_encoding;
+
+  /**
+   * Value data left over from previous iteration.
+   */
+  char xbuf[2];
+
+  /**
+   * Size of our buffer for the key.
+   */
+  size_t buffer_size;
+
+  /**
+   * Current position in the key buffer.
+   */
+  size_t buffer_pos;
+
+  /**
+   * Current position in @e xbuf.
+   */
+  size_t xbuf_pos;
+
+  /**
+   * Current offset in the value being processed.
+   */
+  uint64_t value_offset;
+
+  /**
+   * strlen(boundary) -- if boundary != NULL.
+   */
+  size_t blen;
+
+  /**
+   * strlen(nested_boundary) -- if nested_boundary != NULL.
+   */
+  size_t nlen;
+
+  /**
+   * Do we have to call the 'ikvi' callback when processing the
+   * multipart post body even if the size of the payload is zero?
+   * Set to #MHD_YES whenever we parse a new multiparty entry header,
+   * and to #MHD_NO the first time we call the 'ikvi' callback.
+   * Used to ensure that we do always call 'ikvi' even if the
+   * payload is empty (but not more than once).
+   */
+  bool must_ikvi;
+
+  /**
+   * Set if we still need to run the unescape logic
+   * on the key allocated at the end of this struct.
+   */
+  bool must_unescape_key;
+
+  /**
+   * State of the parser.
+   */
+  enum PP_State state;
+
+  /**
+   * Side-state-machine: skip LRCR (or just LF).
+   * Set to 0 if we are not in skip mode.  Set to 2
+   * if a LFCR is expected, set to 1 if a CR should
+   * be skipped if it is the next character.
+   */
+  enum RN_State skip_rn;
+
+  /**
+   * If we are in skip_rn with "dash" mode and
+   * do find 2 dashes, what state do we go into?
+   */
+  enum PP_State dash_state;
+
+  /**
+   * Which headers are global? (used to tell which
+   * headers were only valid for the nested multipart).
+   */
+  enum NE_State have;
+
+};
+
+#endif /* ! MHD_POSTPROCESSOR_H */