1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H
20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #include <string.h>
25 
26 /* Retuns 1 if the version is supported, 0 otherwise. */
27 int grpc_chttp2_is_alpn_version_supported(const char* version, size_t size);
28 
29 /* Returns the number of protocol versions to advertise */
30 size_t grpc_chttp2_num_alpn_versions(void);
31 
32 /* Returns the protocol version at index i (0 <= i <
33  * grpc_chttp2_num_alpn_versions()) */
34 const char* grpc_chttp2_get_alpn_version_index(size_t i);
35 
36 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H */
37