1 /* 2 * Copyright 2017 The WebRTC Project Authors. All rights reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 #ifndef RTC_BASE_NET_HELPER_H_ 11 #define RTC_BASE_NET_HELPER_H_ 12 13 #include <string> 14 15 #include "absl/strings/string_view.h" 16 17 // This header contains helper functions and constants used by different types 18 // of transports. 19 namespace cricket { 20 21 extern const char UDP_PROTOCOL_NAME[]; 22 extern const char TCP_PROTOCOL_NAME[]; 23 extern const char SSLTCP_PROTOCOL_NAME[]; 24 extern const char TLS_PROTOCOL_NAME[]; 25 26 constexpr int kTcpHeaderSize = 20; 27 constexpr int kUdpHeaderSize = 8; 28 29 // Get the transport layer overhead per packet based on the protocol. 30 int GetProtocolOverhead(absl::string_view protocol); 31 32 } // namespace cricket 33 34 #endif // RTC_BASE_NET_HELPER_H_ 35