third_party/grpc/src/core/ext/transport/chttp2/alpn/alpn.h

/*
 *
 * 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.
 *
 */

#ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H
#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H

#include <grpc/support/port_platform.h>

#include <string.h>

/* Retuns 1 if the version is supported, 0 otherwise. */
int grpc_chttp2_is_alpn_version_supported(const char* version, size_t size);

/* Returns the number of protocol versions to advertise */
size_t grpc_chttp2_num_alpn_versions(void);

/* Returns the protocol version at index i (0 <= i <
 * grpc_chttp2_num_alpn_versions()) */
const char* grpc_chttp2_get_alpn_version_index(size_t i);

#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H */