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TCPHeader.h
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TCPHeader.h
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/***************************************************************************
* *
* _ _____ ____ *
* /\ | | | __ \ /\ | _ \ /\ *
* / \ | | | | | | / \ | |_) | / \ *
* / /\ \ | | | | | | / /\ \ | _ < / /\ \ *
* / ____ \ | |___ | |__| / / ____ \ | |_) / / ____ \ *
* /_/ \_\ | ____| |_____/ /_/ \_\ |____/ /_/ \_\ *
* *
* == {Port Knocking/Single Packet Authorization} Security Suite == *
* *
***************************************************************************
* *
* This file is part of Aldaba Knocking Suite. *
* *
* Copyright (c) 2010, Luis MartinGarcia. (aldabaknocking@gmail.com) *
* *
* Aldaba is free software; you can redistribute it and/or modify it under *
* the terms of the GNU General Public License as published by the Free *
* Software Foundation; Version 2 of the License, with the exceptions, *
* conditions and clarifications described in the file named LICENSE.txt, *
* distributed with Aldaba or available from: *
* <http://www.aldabaknocking.com/LICENSE.txt> *
* *
* Aldaba is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* v2.0 for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with Aldaba; if not, write to the Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *
* *
* Please check file LICENSE.txt for the complete version of the license, *
* as this disclaimer does not contain the complete information. Also, note*
* that although Aldaba is licensed under the GNU GPL v2.0 license, it may *
* be possible to obtain copies of it under different, less restrictive, *
* alternative licenses. Requests will be studied on a case by case basis. *
* If you wish to obtain Aldaba under a different license, please use the *
* email address shown above. *
* *
***************************************************************************/
#ifndef __TCPHEADER_H__
#define __TCPHEADER_H__ 1
#include "TransportLayerElement.h"
/* TCP FLAGS */
#define TH_FIN 0x01
#define TH_SYN 0x02
#define TH_RST 0x04
#define TH_PUSH 0x08
#define TH_ACK 0x10
#define TH_URG 0x20
#define TH_ECN 0x40
#define TH_CWR 0x80
#define TCP_HEADER_LEN 20
#define MAX_TCP_OPTIONS_LEN 40
class TCPHeader : public TransportLayerElement {
private:
struct my_tcp_hdr {
u16 th_sport; /* Source port */
u16 th_dport; /* Destination port */
u32 th_seq; /* Sequence number */
u32 th_ack; /* Acknowledgement number */
#if WORDS_BIGENDIAN
u8 th_off:4; /* Data offset */
u8 th_x2:4; /* Reserved */
#else
u8 th_x2:4; /* Reserved */
u8 th_off:4; /* Data offset */
#endif
u8 th_flags; /* Flags */
u16 th_win; /* Window size */
u16 th_sum; /* Checksum */
u16 th_urp; /* Urgent pointer */
u8 options[MAX_TCP_OPTIONS_LEN ]; /* Space for TCP Options */
}h;
struct tcpopt_hdr {
u_char type; /* type */
u_char len; /* length */
u_short value; /* value */
};
int tcpoptlen; /**< Length of TCP options */
public:
TCPHeader();
~TCPHeader();
void reset();
u8 *getBufferPointer();
int storeRecvData(const u8 *buf, size_t len);
int validate();
int setSrcPort(u16 p);
u16 getSrcPort();
int setDstPort(u16 p);
u16 getDstPort();
int setSeq(u32 p);
u32 getSeq();
int setAck(u32 p);
u32 getAck();
int setOffset(u8 o);
int setOffset();
u8 getOffset();
int setFlags(u8 f);
u8 getFlags();
bool setCWR();
bool unsetCWR();
bool getCWR();
bool setECE();
bool unsetECE();
bool getECE();
bool setECN();
bool unsetECN();
bool getECN();
bool setURG();
bool unsetURG();
bool getURG();
bool setACK();
bool unsetACK();
bool getACK();
bool setPUSH();
bool unsetPUSH();
bool getPUSH();
bool setRST();
bool unsetRST();
bool getRST();
bool setSYN();
bool unsetSYN();
bool getSYN();
bool setFIN();
bool unsetFIN();
bool getFIN();
int setWindow(u16 p);
u16 getWindow();
int setUrgPointer(u16 l);
u16 getUrgPointer();
int setSum(u16 s);
int setSum(struct in_addr source, struct in_addr destination);
u16 getSum();
}; /* End of class TCPHeader */
#endif /* __TCPHEADER_H__ */