text: /*
   * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License").
   * You may not use this file except in compliance with the License.
   * A copy of the License is located at
   *
   *  http://aws.amazon.com/apache2.0
   *
   * or in the "license" file accompanying this file. This file is distributed
   * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
   * express or implied. See the License for the specific language governing
   * permissions and limitations under the License.
   */
  
  #pragma once
  
  #include "stuffer/s2n_stuffer.h"
  #include "tls/extensions/s2n_extension_type.h"
  
  #define S2N_PARSED_EXTENSIONS_COUNT S2N_SUPPORTED_EXTENSIONS_COUNT
  
  typedef struct {
      uint16_t extension_type;
      struct s2n_blob extension;
  } s2n_parsed_extension;
  
  typedef struct {
      s2n_parsed_extension parsed_extensions[S2N_PARSED_EXTENSIONS_COUNT];
      struct s2n_blob raw; /* Needed by some ClientHello APIs */
  } s2n_parsed_extensions_list;
  
  typedef enum {
      S2N_EXTENSION_LIST_CLIENT_HELLO = 0,
      S2N_EXTENSION_LIST_SERVER_HELLO_DEFAULT,
      S2N_EXTENSION_LIST_SERVER_HELLO_TLS13,
      S2N_EXTENSION_LIST_ENCRYPTED_EXTENSIONS,
      S2N_EXTENSION_LIST_CERT_REQ,
      S2N_EXTENSION_LIST_CERTIFICATE,
      S2N_EXTENSION_LIST_EMPTY,
      S2N_EXTENSION_LIST_IDS_COUNT,
  } s2n_extension_list_id;
  
  int s2n_extension_list_send(s2n_extension_list_id list_type, struct s2n_connection *conn, struct s2n_stuffer *out);
  int s2n_extension_list_recv(s2n_extension_list_id list_type, struct s2n_connection *conn, struct s2n_stuffer *in);
  
  int s2n_extension_process(const s2n_extension_type *extension_type, struct s2n_connection *conn,
          s2n_parsed_extensions_list *parsed_extension_list);
  int s2n_extension_list_process(s2n_extension_list_id list_type, struct s2n_connection *conn,
          s2n_parsed_extensions_list *parsed_extension_list);
  int s2n_extension_list_parse(struct s2n_stuffer *in, s2n_parsed_extensions_list *parsed_extension_list);
  