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/*
* Dibbler - a portable DHCPv6
*
* authors: Adrien CLERC, Bahattin DEMIRPLAK, Gatant ELEOUET
* Mickal GURIN, Lionel GUILMIN, Laurline PROVOST
* from ENSEEIHT, Toulouse, France
*
* released under GNU GPL v2 licence
*
* $Id: OptFQDN.cpp,v 1.8 2008-11-11 20:55:46 thomson Exp $
*
*/
#include "Portable.h"
#include "OptFQDN.h"
#include "Logger.h"
TOptFQDN::TOptFQDN(string domain, TMsg* parent)
:TOpt(OPTION_FQDN, parent) {
fqdn = domain;
flag_N = false;
flag_S = false;
flag_O = false; // This flag is always off in client messages.
Valid = true;
}
TOptFQDN::TOptFQDN(char * &buf, int &bufsize, TMsg* parent)
:TOpt(OPTION_FQDN, parent) {
this->Valid = false;
// Extracting flags...
unsigned char flags = *buf;
this->flag_N = flags & FQDN_N;
this->flag_S = flags & FQDN_S;
this->flag_O = flags & FQDN_O;
buf += 1;
bufsize -= 1;
//Extracting domain name
fqdn = "";
if ( bufsize <= 255 ) {
unsigned char tmplength = *buf;
if (tmplength>bufsize)
{
Log(Warning) << "Malformed FQDN option: domain name encoding is invalid. "
<< "(Is this message sent by Microsoft? Tell them to fix the FQDN option.)" << LogEnd;
Valid = false;
return;
}
buf++;
while (tmplength != 0) {
fqdn.append(buf, tmplength);
buf += tmplength;
bufsize -= tmplength;
tmplength = *buf;
if (tmplength>bufsize)
{
Log(Warning) << "Malformed FQDN option: domain name encoding is invalid."
<< "(Is this message sent by Microsoft? Tell them to fix the FQDN option.)" << LogEnd;
Valid = false;
return;
}
buf++;
if ( tmplength != 0 ) {
fqdn.append(".");
}
}
buf++;
bufsize--;
Valid = true;
}
Log(Debug) << "FQDN: FQDN option received: fqdn name=" << fqdn << LogEnd;
}
TOptFQDN::~TOptFQDN() {
return;
}
void TOptFQDN::setNFlag(bool flag) {
flag_N = flag;
}
void TOptFQDN::setSFlag(bool flag) {
flag_S = flag;
}
void TOptFQDN::setOFlag(bool flag) {
flag_O = flag;
}
string TOptFQDN::getFQDN() {
return fqdn;
}
/**
* @brief returns option size
*
* Each dot will be removed from the string, and replaced with a length < 63
* The first length and the final 0 will increased the fqdn string length by 2
* We also have to add 4 for the header (option type and size) and 1 for the flags.
* 2 + 1 + 4 = 7
*
*
*
* @return size of the option (without option header)
*/
int TOptFQDN::getSize() {
if (fqdn.length())
return fqdn.length() + 7;
else
return 6;
}
char * TOptFQDN::storeSelf(char *buffer) {
// Type and size
*(short*)buffer = htons(OptType);
buffer+=2;
*(short*)buffer = htons(getSize()-4);
buffer+=2;
//Flag Initialization
*buffer = 0;
if (flag_N) {
*buffer += FQDN_N;
}
if (flag_S) {
*buffer += FQDN_S;
}
if (flag_O) {
*buffer += FQDN_O;
}
buffer++;
//FQDN data :)
if ( fqdn.length() != 0 ) {
string copy = "";
copy += fqdn;
std::string::size_type dotpos = copy.find('.', 0);
while(dotpos != string::npos) {
*buffer = dotpos;
buffer++;
memcpy(buffer, copy.c_str(), dotpos);
buffer += dotpos;
copy.assign(copy, dotpos + 1, copy.length());
dotpos = copy.find('.', 0);
}
*buffer = copy.length();
buffer++;
memcpy(buffer, copy.c_str(), copy.length());
buffer += copy.length();
}
*buffer = 0;
//buffer++;
return buffer;
}
bool TOptFQDN::isValid() {
//TODO Check the validity of this option
return Valid;
}
bool TOptFQDN::getNFlag( ) {
return flag_N;
}
bool TOptFQDN::getSFlag( ) {
return flag_S;
}
bool TOptFQDN::getOFlag( ) {
return flag_O;
}
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