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udpanalysis.cpp
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udpanalysis.cpp
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#include <stdio.h>
#include <strings.h>
#include <memory.h>
#include <netinet/in.h>
#include "udpanalysis.h"
UdpAnalysis::UdpAnalysis():
Analysis("udp", UDP_CODE)
{
bzero(&_udphdr, sizeof(_udphdr));
}
UdpAnalysis::~UdpAnalysis()
{
}
void UdpAnalysis::analyzeProtocol(ProtocolStack &pstack, size_t *bytes)
{
if(_bufsize < sizeof(_udphdr))
{
bzero(&_udphdr, sizeof(_udphdr));
return;
}
memcpy(&_udphdr, _buffer, sizeof(_udphdr));
_udphdr.source = ntohs(_udphdr.source);
_udphdr.dest = ntohs(_udphdr.dest);
_udphdr.len = ntohs(_udphdr.len);
_udphdr.check = ntohs(_udphdr.check);
if(bytes != NULL)
*bytes += _udphdr.len;
pstack.push_back(this);
int port = _udphdr.source < _udphdr.dest ? _udphdr.source:_udphdr.dest;
Analysis *child = _getChild(port);
if(child != NULL)
{
child->setBuffer(_buffer + 8, _bufsize - 8);
child->analyzeProtocol(pstack, NULL);
}
}
void UdpAnalysis::printResult()
{
printf("UDP:\n");
printf("\tSource port: %u, Destination port: %u\n",
_udphdr.source, _udphdr.dest);
printf("\tUdp len: %u, Check sum: 0x%x\n",
_udphdr.len, _udphdr.check);
/*
unsigned short port = _src_port < _dst_port ? _src_port:_dst_port;
Analysis *child = _getChild(port);
if(child != NULL)
{
child->printResult();
}
*/
}
unsigned short UdpAnalysis::getSrcPort()const
{
return _udphdr.source;
}
unsigned short UdpAnalysis::getDstPort()const
{
return _udphdr.dest;
}
unsigned short UdpAnalysis::getUdpLen()const
{
return _udphdr.len;
}
unsigned short UdpAnalysis::getCheckSum()const
{
return _udphdr.check;
}