mirror of
https://github.com/mfontanini/libtins
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103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
/*
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* Copyright (c) 2014, Matias Fontanini
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifdef TINS_DEBUG
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#include <cassert>
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#endif // TINS_DEBUG
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#include <algorithm>
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#include <cstring>
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#include <pcap.h>
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#include "dot11/dot11_base.h"
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#include "dot3.h"
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#include "ethernetII.h"
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#include "radiotap.h"
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#include "loopback.h"
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#include "sll.h"
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#include "ppi.h"
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#include "internals.h"
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#include "exceptions.h"
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namespace Tins {
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PPI::PPI(const uint8_t *buffer, uint32_t total_sz) {
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if(total_sz < sizeof(_header))
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throw malformed_packet();
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std::memcpy(&_header, buffer, sizeof(_header));
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if(length() > total_sz || length() < sizeof(_header))
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throw malformed_packet();
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buffer += sizeof(_header);
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total_sz -= sizeof(_header);
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// There are some options
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const size_t options_length = length() - sizeof(_header);
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if(options_length > 0) {
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_data.assign(buffer, buffer + options_length);
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buffer += options_length;
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total_sz -= static_cast<uint32_t>(options_length);
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}
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if(total_sz > 0) {
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switch(dlt()) {
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case DLT_IEEE802_11:
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#ifdef HAVE_DOT11
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inner_pdu(Dot11::from_bytes(buffer, total_sz));
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#else
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throw protocol_disabled();
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#endif
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break;
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case DLT_EN10MB:
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if(Internals::is_dot3(buffer, total_sz))
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inner_pdu(new Dot3(buffer, total_sz));
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else
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inner_pdu(new EthernetII(buffer, total_sz));
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break;
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case DLT_IEEE802_11_RADIO:
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#ifdef HAVE_DOT11
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inner_pdu(new RadioTap(buffer, total_sz));
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#else
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throw protocol_disabled();
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#endif
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break;
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case DLT_NULL:
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inner_pdu(new Loopback(buffer, total_sz));
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break;
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case DLT_LINUX_SLL:
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inner_pdu(new Tins::SLL(buffer, total_sz));
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break;
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}
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}
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}
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uint32_t PPI::header_size() const {
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return static_cast<uint32_t>(sizeof(_header) + _data.size());
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}
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void PPI::write_serialization(uint8_t *buffer, uint32_t total_sz, const PDU *) {
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throw std::runtime_error("PPI serialization not supported");
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}
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}
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