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_SRC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H
20 #define GRPC_SRC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #include <string.h>
25 
26 // Returns 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_SRC_CORE_EXT_TRANSPORT_CHTTP2_ALPN_ALPN_H
37