Line data    Source code

       1             : /*
       2             :  *
       3             :  * Copyright 2015, Google Inc.
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions are
       8             :  * met:
       9             :  *
      10             :  *     * Redistributions of source code must retain the above copyright
      11             :  * notice, this list of conditions and the following disclaimer.
      12             :  *     * Redistributions in binary form must reproduce the above
      13             :  * copyright notice, this list of conditions and the following disclaimer
      14             :  * in the documentation and/or other materials provided with the
      15             :  * distribution.
      16             :  *     * Neither the name of Google Inc. nor the names of its
      17             :  * contributors may be used to endorse or promote products derived from
      18             :  * this software without specific prior written permission.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      21             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      22             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      23             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      24             :  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      25             :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      26             :  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      30             :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31             :  *
      32             :  */
      33             : 
      34             : #include "src/core/transport/chttp2/alpn.h"
      35             : #include <grpc/support/log.h>
      36             : #include <grpc/support/useful.h>
      37             : 
      38             : /* in order of preference */
      39             : static const char *const supported_versions[] = {"h2"};
      40             : 
      41         964 : int grpc_chttp2_is_alpn_version_supported(const char *version, size_t size) {
      42             :   size_t i;
      43         966 :   for (i = 0; i < GPR_ARRAY_SIZE(supported_versions); i++) {
      44         964 :     if (!strncmp(version, supported_versions[i], size)) return 1;
      45             :   }
      46           2 :   return 0;
      47             : }
      48             : 
      49        1165 : size_t grpc_chttp2_num_alpn_versions(void) {
      50        1165 :   return GPR_ARRAY_SIZE(supported_versions);
      51             : }
      52             : 
      53        2330 : const char *grpc_chttp2_get_alpn_version_index(size_t i) {
      54        2330 :   GPR_ASSERT(i < GPR_ARRAY_SIZE(supported_versions));
      55        2330 :   return supported_versions[i];
      56             : }