| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License 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 <grpc/support/port_platform.h> |
| |
| #include <grpc/support/log.h> |
| #include "src/core/ext/transport/chttp2/alpn/alpn.h" |
| |
| #include "src/core/lib/gpr/useful.h" |
| |
| /* in order of preference */ |
| static const char* const supported_versions[] = {"grpc-exp", "h2"}; |
| |
| int grpc_chttp2_is_alpn_version_supported(const char* version, size_t size) { |
| size_t i; |
| for (i = 0; i < GPR_ARRAY_SIZE(supported_versions); i++) { |
| if (!strncmp(version, supported_versions[i], size)) return 1; |
| } |
| return 0; |
| } |
| |
| size_t grpc_chttp2_num_alpn_versions(void) { |
| return GPR_ARRAY_SIZE(supported_versions); |
| } |
| |
| const char* grpc_chttp2_get_alpn_version_index(size_t i) { |
| GPR_ASSERT(i < GPR_ARRAY_SIZE(supported_versions)); |
| return supported_versions[i]; |
| } |