/* * Copyright (c) 2017, Matias Fontanini * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef TINS_TCP_H #define TINS_TCP_H #include #include #include #include #include #include #include #include #include namespace Tins { namespace Memory { class OutputMemoryStream; } // Memory /** * \class TCP * \brief Represents a TCP PDU. * * This class represents a TCP PDU. * * When sending TCP PDUs, the checksum is calculated automatically * every time you send the packet. * * While sniffing, the payload sent in each packet will be wrapped * in a RawPDU, which is set as the TCP object's inner_pdu. Therefore, * if you are sniffing and want to see the TCP packet's payload, * you need to do the following: * * \code * // Get a packet from somewhere. * TCP tcp = ...; * * // Extract the RawPDU object. * const RawPDU& raw = tcp.rfind_pdu(); * * // Finally, take the payload (this is a vector) * const RawPDU::payload_type& payload = raw.payload(); * \endcode * * \sa RawPDU */ class TINS_API TCP : public PDU { public: /** * This PDU's flag. */ static const PDU::PDUType pdu_flag = PDU::TCP; /** * \brief TCP flags enum. * * These flags identify those supported by the TCP PDU. */ enum Flags { FIN = 1, SYN = 2, RST = 4, PSH = 8, ACK = 16, URG = 32, ECE = 64, CWR = 128 }; /** * \brief TCP options enum. * * This enum defines option types supported by TCP PDU. */ enum OptionTypes { EOL = 0, NOP = 1, MSS = 2, WSCALE = 3, SACK_OK = 4, SACK = 5, TSOPT = 8, ALTCHK = 14, RFC_EXPERIMENT_1 = 253, RFC_EXPERIMENT_2 = 254 }; /** * \brief Alternate checksum enum. */ enum AltChecksums { CHK_TCP, CHK_8FLETCHER, CHK_16FLETCHER }; /** * The type used to store TCP options. */ typedef PDUOption option; /** * The type used to store the options. */ typedef std::vector