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/*
* anytun
*
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methodes used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007 anytun.org <satp@wirdorange.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <arpa/inet.h>
#include "datatypes.h"
#include "package.h"
Package::Package()
{
header_ = 0;
payload_type_ = 0;
auth_tag_ = 0;
}
Package::Package(u_int32_t length) : Buffer(length)
{
header_ = 0;
payload_type_ = 0;
auth_tag_ = 0;
}
Package::Package(const Buffer &src) : Buffer(src)
{
header_ = 0;
payload_type_ = 0;
auth_tag_ = 0;
}
bool Package::hasHeader() const
{
return header_;
}
Package& Package::withHeader(bool b)
{
if(b && length_ >= sizeof(struct HeaderStruct))
header_ = reinterpret_cast<struct HeaderStruct*>(buf_);
else
header_ = 0;
return *this;
}
seq_nr_t Package::getSeqNr() const
{
if(!header_)
return 0;
return SEQ_NR_T_NTOH(header_->seq_nr);
}
sender_id_t Package::getSenderId() const
{
if(!header_)
return 0;
return SENDER_ID_T_NTOH(header_->sender_id);
}
Package& Package::addHeader(seq_nr_t seq_nr, sender_id_t sender_id)
{
if(!header_)
{
if(sizeof(struct HeaderStruct) > resizeFront(length_ + sizeof(struct HeaderStruct)))
return *this;
header_ = reinterpret_cast<struct HeaderStruct*>(buf_);
}
header_->seq_nr = SEQ_NR_T_HTON(seq_nr);
header_->sender_id = SENDER_ID_T_HTON(sender_id);
return *this;
}
Package& Package::removeHeader()
{
if(!header_)
return *this;
if(length_ >= sizeof(struct HeaderStruct))
resizeFront(length_ - sizeof(struct HeaderStruct));
header_ = 0;
return *this;
}
Package& Package::setSeqNr(seq_nr_t seq_nr)
{
if(header_)
header_->seq_nr = SEQ_NR_T_HTON(seq_nr);
return *this;
}
Package& Package::setSenderId(sender_id_t sender_id)
{
if(header_)
header_->sender_id = SENDER_ID_T_HTON(sender_id);
return *this;
}
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