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.
   */
  
  #include "s2n_test.h"
  
  #include "tls/extensions/s2n_server_alpn.h"
  
  int main(int argc, char **argv)
  {
      BEGIN_TEST();
  
      const char *test_protocol_name = "chosen_protocol";
      const uint8_t test_protocol_name_size = strlen(test_protocol_name);
  
      /* Test should_send */
      {
          struct s2n_connection *conn;
          EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
  
          /* Should not send if protocol not set. Protocol not set by default. */
          EXPECT_FALSE(s2n_server_alpn_extension.should_send(conn));
  
          /* Should send if protocol set. */
          EXPECT_MEMCPY_SUCCESS(conn->application_protocol, test_protocol_name, test_protocol_name_size);
          EXPECT_TRUE(s2n_server_alpn_extension.should_send(conn));
  
          EXPECT_SUCCESS(s2n_connection_free(conn));
      }
  
      /* Test send */
      {
          struct s2n_connection *conn;
          EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
          EXPECT_MEMCPY_SUCCESS(conn->application_protocol, test_protocol_name, test_protocol_name_size);
  
          struct s2n_stuffer stuffer;
          EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
  
          EXPECT_SUCCESS(s2n_server_alpn_extension.send(conn, &stuffer));
  
          /* Should have correct total size */
          uint16_t protocol_name_list_size;
          EXPECT_SUCCESS(s2n_stuffer_read_uint16(&stuffer, &protocol_name_list_size));
          EXPECT_EQUAL(protocol_name_list_size, s2n_stuffer_data_available(&stuffer));
  
          /* Should have correct protocol name size */
          uint8_t protocol_name_size;
          EXPECT_SUCCESS(s2n_stuffer_read_uint8(&stuffer, &protocol_name_size));
          EXPECT_EQUAL(protocol_name_size, s2n_stuffer_data_available(&stuffer));
          EXPECT_EQUAL(protocol_name_size, test_protocol_name_size);
  
          /* Should have correct protocol name */
          uint8_t *protocol_name;
          EXPECT_NOT_NULL(protocol_name = s2n_stuffer_raw_read(&stuffer, protocol_name_size));
          EXPECT_BYTEARRAY_EQUAL(protocol_name, test_protocol_name, test_protocol_name_size);
  
          EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
          EXPECT_SUCCESS(s2n_connection_free(conn));
      }
  
      /* Test recv */
      {
          struct s2n_connection *server_conn;
          EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
          EXPECT_MEMCPY_SUCCESS(server_conn->application_protocol, test_protocol_name, test_protocol_name_size);
  
          /* Should accept extension written by send */
          {
              struct s2n_connection *client_conn;
              EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
  
              struct s2n_stuffer stuffer;
              EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
  
              EXPECT_SUCCESS(s2n_server_alpn_extension.send(server_conn, &stuffer));
  
              EXPECT_NULL(s2n_get_application_protocol(client_conn));
              EXPECT_SUCCESS(s2n_server_alpn_extension.recv(client_conn, &stuffer));
              EXPECT_NOT_NULL(s2n_get_application_protocol(client_conn));
              EXPECT_STRING_EQUAL(s2n_get_application_protocol(client_conn), test_protocol_name);
  
              EXPECT_EQUAL(s2n_stuffer_data_available(&stuffer), 0);
  
              EXPECT_SUCCESS(s2n_connection_free(client_conn));
              EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
          }
  
          /* Should ignore extension if protocol name list size incorrect */
          {
              struct s2n_connection *client_conn;
              EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
  
              struct s2n_stuffer stuffer;
              EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
  
              EXPECT_SUCCESS(s2n_server_alpn_extension.send(server_conn, &stuffer));
              EXPECT_SUCCESS(s2n_stuffer_wipe_n(&stuffer, 1));
  
              EXPECT_NULL(s2n_get_application_protocol(client_conn));
              EXPECT_SUCCESS(s2n_server_alpn_extension.recv(client_conn, &stuffer));
              EXPECT_NULL(s2n_get_application_protocol(client_conn));
  
              EXPECT_SUCCESS(s2n_connection_free(client_conn));
              EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
          }
  
          EXPECT_SUCCESS(s2n_connection_free(server_conn));
      }
  
      END_TEST();
      return 0;
  }
  