1 /* 2 * SRT - Secure, Reliable, Transport 3 * Copyright (c) 2018 Haivision Systems Inc. 4 * 5 * This Source Code Form is subject to the terms of the Mozilla Public 6 * License, v. 2.0. If a copy of the MPL was not distributed with this 7 * file, You can obtain one at http://mozilla.org/MPL/2.0/. 8 * 9 */ 10 11 /***************************************************************************** 12 Copyright (c) 2001 - 2011, The Board of Trustees of the University of Illinois. 13 All rights reserved. 14 15 Redistribution and use in source and binary forms, with or without 16 modification, are permitted provided that the following conditions are 17 met: 18 19 * Redistributions of source code must retain the above 20 copyright notice, this list of conditions and the 21 following disclaimer. 22 23 * Redistributions in binary form must reproduce the 24 above copyright notice, this list of conditions 25 and the following disclaimer in the documentation 26 and/or other materials provided with the distribution. 27 28 * Neither the name of the University of Illinois 29 nor the names of its contributors may be used to 30 endorse or promote products derived from this 31 software without specific prior written permission. 32 33 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 34 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 35 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 36 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 37 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 38 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 39 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 40 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 41 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 42 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 43 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 44 *****************************************************************************/ 45 46 /***************************************************************************** 47 written by 48 Yunhong Gu, last updated 01/27/2011 49 modified by 50 Haivision Systems Inc. 51 *****************************************************************************/ 52 53 #ifndef INC_SRT_CHANNEL_H 54 #define INC_SRT_CHANNEL_H 55 56 #include "platform_sys.h" 57 #include "udt.h" 58 #include "packet.h" 59 #include "socketconfig.h" 60 #include "netinet_any.h" 61 62 namespace srt 63 { 64 65 class CChannel 66 { 67 void createSocket(int family); 68 69 public: 70 // XXX There's currently no way to access the socket ID set for 71 // whatever the channel is currently working for. Required to find 72 // some way to do this, possibly by having a "reverse pointer". 73 // Currently just "unimplemented". CONID()74 std::string CONID() const { return ""; } 75 76 CChannel(); 77 ~CChannel(); 78 79 /// Open a UDP channel. 80 /// @param [in] addr The local address that UDP will use. 81 82 void open(const sockaddr_any& addr); 83 84 void open(int family); 85 86 /// Open a UDP channel based on an existing UDP socket. 87 /// @param [in] udpsock UDP socket descriptor. 88 89 void attach(UDPSOCKET udpsock, const sockaddr_any& adr); 90 91 /// Disconnect and close the UDP entity. 92 93 void close() const; 94 95 /// Get the UDP sending buffer size. 96 /// @return Current UDP sending buffer size. 97 98 int getSndBufSize(); 99 100 /// Get the UDP receiving buffer size. 101 /// @return Current UDP receiving buffer size. 102 103 int getRcvBufSize(); 104 105 /// Query the socket address that the channel is using. 106 /// @param [out] addr pointer to store the returned socket address. 107 108 void getSockAddr(sockaddr_any& addr) const; 109 110 /// Query the peer side socket address that the channel is connect to. 111 /// @param [out] addr pointer to store the returned socket address. 112 113 void getPeerAddr(sockaddr_any& addr) const; 114 115 /// Send a packet to the given address. 116 /// @param [in] addr pointer to the destination address. 117 /// @param [in] packet reference to a CPacket entity. 118 /// @return Actual size of data sent. 119 120 int sendto(const sockaddr_any& addr, srt::CPacket& packet) const; 121 122 /// Receive a packet from the channel and record the source address. 123 /// @param [in] addr pointer to the source address. 124 /// @param [in] packet reference to a CPacket entity. 125 /// @return Actual size of data received. 126 127 EReadStatus recvfrom(sockaddr_any& addr, srt::CPacket& packet) const; 128 129 void setConfig(const CSrtMuxerConfig& config); 130 131 /// Get the IP TTL. 132 /// @param [in] ttl IP Time To Live. 133 /// @return TTL. 134 135 int getIpTTL() const; 136 137 /// Get the IP Type of Service. 138 /// @return ToS. 139 140 int getIpToS() const; 141 142 #ifdef SRT_ENABLE_BINDTODEVICE 143 bool getBind(char* dst, size_t len); 144 #endif 145 146 int ioctlQuery(int type) const; 147 int sockoptQuery(int level, int option) const; 148 bindAddress()149 const sockaddr* bindAddress() { return m_BindAddr.get(); } bindAddressAny()150 const sockaddr_any& bindAddressAny() { return m_BindAddr; } 151 152 private: 153 void setUDPSockOpt(); 154 155 private: 156 UDPSOCKET m_iSocket; // socket descriptor 157 158 // Mutable because when querying original settings 159 // this comprises the cache for extracted values, 160 // although the object itself isn't considered modified. 161 mutable CSrtMuxerConfig m_mcfg; // Note: ReuseAddr is unused and ineffective. 162 sockaddr_any m_BindAddr; 163 }; 164 165 } // namespace srt 166 167 #endif 168