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Added RawPDU class. Removed payload member from TCP and UDP. They're not represented by RawPDUs.

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This commit is contained in:
Matias
2011-08-13 17:22:01 -03:00
parent 398ba31111
commit 759139da3f
6 changed files with 161 additions and 36 deletions
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54
include/rawpdu.h Normal file
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@@ -0,0 +1,54 @@
/*
* libtins is a net packet wrapper library for crafting and
* interpreting sniffed packets.
*
* Copyright (C) 2011 Nasel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __RAWPDU_H
#define __RAWPDU_H
#include "pdu.h"
namespace Tins {
/** \brief Represents a PDU which holds raw data.
*
* In order to send payloads over TCP, UDP, or other transport layer or
* higher level protocols, RawPDU can be used as a wrapper for raw byte arrays.
*/
class RawPDU : public PDU {
public:
RawPDU(uint8_t *payload, uint32_t size);
/** \brief Returns the header size.
*
* This metod overrides PDU::header_size. \sa PDU::header_size
*/
uint32_t header_size() const;
private:
void write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *parent);
uint8_t *_payload;
uint32_t _payload_size;
};
};
#endif

12
include/tcp.h
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@@ -111,10 +111,6 @@ namespace Tins {
*/
inline uint16_t urg_ptr() const { return _tcp.urg_ptr; }
/** \brief Returns the payload.
*/
inline const uint8_t *payload() const { return _payload; }
/** \brief Set the destination port.
* \param new_dport New destination port.
*/
@@ -153,7 +149,10 @@ namespace Tins {
/** \brief Set the payload.
*
* Payload is NOT copied. Therefore, pointers provided as
* payloads must be freed manually by the user.
* payloads must be freed manually by the user. This actually
* creates a RawPDU that holds the payload, and sets it as the
* inner_pdu. Therefore, if an inner_pdu was set previously,
* a call to TCP::payload will delete it.
* \param new_payload New payload.
* \param new_payload_size New payload's size
*/
@@ -247,8 +246,7 @@ namespace Tins {
tcphdr _tcp;
std::vector<TCPOption> _options;
uint8_t *_payload;
uint32_t _payload_size, _options_size, _total_options_size;
uint32_t _options_size, _total_options_size;
};
};

34
include/udp.h
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@@ -1,3 +1,24 @@
/*
* libtins is a net packet wrapper library for crafting and
* interpreting sniffed packets.
*
* Copyright (C) 2011 Nasel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __UDP_H
#define __UDP_H
@@ -22,11 +43,7 @@ namespace Tins {
* */
UDP(uint16_t sport = 0, uint16_t dport = 0);
/** \brief Returns the payload.
*/
inline const uint8_t *payload() const { return _payload; }
/** \brief Returns the destination port
*/
inline uint16_t dport() const { return _udp.dport; }
@@ -50,7 +67,10 @@ namespace Tins {
/** \brief Set the payload.
*
* Payload is NOT copied. Therefore, pointers provided as
* payloads must be freed manually by the user.
* payloads must be freed manually by the user. This actually
* creates a RawPDU that holds the payload, and sets it as the
* inner_pdu. Therefore, if an inner_pdu was set previously,
* a call to UDP::payload will delete it.
* \param new_payload New payload.
* \param new_payload_size New payload's size
*/
@@ -74,8 +94,6 @@ namespace Tins {
void write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *parent);
udphdr _udp;
uint8_t *_payload;
uint32_t _payload_size;
};
};