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#include "dnsrecords.hh"
void NSECRecordContent::report(void)
{
regist(1, 47, &make, &make, "NSEC");
}
DNSRecordContent* NSECRecordContent::make(const string& content)
{
return new NSECRecordContent(content);
}
NSECRecordContent::NSECRecordContent(const string& content, const string& zone) : DNSRecordContent(47)
{
RecordTextReader rtr(content, zone);
rtr.xfrLabel(d_next);
while(!rtr.eof()) {
uint16_t type;
rtr.xfrType(type);
d_set.insert(type);
}
}
void NSECRecordContent::toPacket(DNSPacketWriter& pw)
{
pw.xfrLabel(d_next);
uint8_t res[34];
memset(res, 0, sizeof(res));
set<uint16_t>::const_iterator i;
for(i=d_set.begin(); i != d_set.end() && *i<255; ++i){
res[2+*i/8] |= 1 << (7-(*i%8));
}
int len=0;
if(!d_set.empty())
len=1+*--i/8;
res[1]=len;
string tmp;
tmp.assign(res, res+len+2);
pw.xfrBlob(tmp);
}
NSECRecordContent::DNSRecordContent* NSECRecordContent::make(const DNSRecord &dr, PacketReader& pr)
{
NSECRecordContent* ret=new NSECRecordContent();
pr.xfrLabel(ret->d_next);
string bitmap;
pr.xfrBlob(bitmap);
// 00 06 20 00 00 00 00 03 -> NS RRSIG NSEC ( 2, 46, 47 ) counts from left
if(bitmap.size() < 2)
throw MOADNSException("NSEC record with impossibly small bitmap");
if(bitmap[0])
throw MOADNSException("Can't deal with NSEC mappings > 255 yet");
unsigned int len=bitmap[1];
if(bitmap.size()!=2+len)
throw MOADNSException("Can't deal with multi-part NSEC mappings yet");
for(unsigned int n=0 ; n < len ; ++n) {
uint8_t val=bitmap[2+n];
for(int bit = 0; bit < 8 ; ++bit , val>>=1)
if(val & 1) {
ret->d_set.insert((7-bit) + 8*(n));
}
}
return ret;
}
string NSECRecordContent::getZoneRepresentation() const
{
string ret;
RecordTextWriter rtw(ret);
rtw.xfrLabel(d_next);
for(set<uint16_t>::const_iterator i=d_set.begin(); i!=d_set.end(); ++i) {
ret+=" ";
ret+=NumberToType(*i);
}
return ret;
}
////// begin of NSEC3
void NSEC3RecordContent::report(void)
{
regist(1, 50, &make, &make, "NSEC3");
}
DNSRecordContent* NSEC3RecordContent::make(const string& content)
{
return new NSEC3RecordContent(content);
}
NSEC3RecordContent::NSEC3RecordContent(const string& content, const string& zone) : DNSRecordContent(50)
{
RecordTextReader rtr(content, zone);
rtr.xfr8BitInt(d_algorithm);
rtr.xfr8BitInt(d_flags);
rtr.xfr16BitInt(d_iterations);
rtr.xfrHexBlob(d_salt);
rtr.xfrBase32HexBlob(d_nexthash);
while(!rtr.eof()) {
uint16_t type;
rtr.xfrType(type);
d_set.insert(type);
}
}
void NSEC3RecordContent::toPacket(DNSPacketWriter& pw)
{
pw.xfr8BitInt(d_algorithm);
pw.xfr8BitInt(d_flags);
pw.xfr16BitInt(d_iterations);
pw.xfr8BitInt(d_salt.length());
pw.xfrBlob(d_salt);
pw.xfr8BitInt(d_nexthash.length());
pw.xfrBlob(d_nexthash);
uint8_t res[34];
memset(res, 0, sizeof(res));
set<uint16_t>::const_iterator i;
for(i=d_set.begin(); i != d_set.end() && *i<255; ++i){
res[2+*i/8] |= 1 << (7-(*i%8));
}
int len=0;
if(!d_set.empty())
len=1+*--i/8;
res[1]=len;
string tmp;
tmp.assign(res, res+len+2);
pw.xfrBlob(tmp);
}
NSEC3RecordContent::DNSRecordContent* NSEC3RecordContent::make(const DNSRecord &dr, PacketReader& pr)
{
NSEC3RecordContent* ret=new NSEC3RecordContent();
pr.xfr8BitInt(ret->d_algorithm);
pr.xfr8BitInt(ret->d_flags);
pr.xfr16BitInt(ret->d_iterations);
uint8_t len;
pr.xfr8BitInt(len);
pr.xfrBlob(ret->d_salt, len);
pr.xfr8BitInt(len);
pr.xfrBlob(ret->d_nexthash, len);
string bitmap;
pr.xfrBlob(bitmap);
// 00 06 20 00 00 00 00 03 -> NS RRSIG NSEC ( 2, 46, 47 ) counts from left
if(bitmap.empty())
return ret;
if(bitmap.size() < 2)
throw MOADNSException("NSEC3 record with impossibly small bitmap");
if(bitmap[0])
throw MOADNSException("Can't deal with NSEC3 mappings > 255 yet");
unsigned int bitmaplen=bitmap[1];
if(bitmap.size()!=2+bitmaplen)
throw MOADNSException("Can't deal with multi-part NSEC3 mappings yet");
for(unsigned int n=0 ; n < bitmaplen ; ++n) {
uint8_t val=bitmap[2+n];
for(int bit = 0; bit < 8 ; ++bit , val>>=1)
if(val & 1) {
ret->d_set.insert((7-bit) + 8*(n));
}
}
return ret;
}
string NSEC3RecordContent::getZoneRepresentation() const
{
string ret;
RecordTextWriter rtw(ret);
rtw.xfr8BitInt(d_algorithm);
rtw.xfr8BitInt(d_flags);
rtw.xfr16BitInt(d_iterations);
rtw.xfrHexBlob(d_salt);
rtw.xfrBase32HexBlob(d_nexthash);
for(set<uint16_t>::const_iterator i=d_set.begin(); i!=d_set.end(); ++i) {
ret+=" ";
ret+=NumberToType(*i);
}
return ret;
}
void NSEC3PARAMRecordContent::report(void)
{
regist(1, 51, &make, &make, "NSEC3PARAM");
}
DNSRecordContent* NSEC3PARAMRecordContent::make(const string& content)
{
return new NSEC3PARAMRecordContent(content);
}
NSEC3PARAMRecordContent::NSEC3PARAMRecordContent(const string& content, const string& zone) : DNSRecordContent(51)
{
RecordTextReader rtr(content, zone);
rtr.xfr8BitInt(d_algorithm);
rtr.xfr8BitInt(d_flags);
rtr.xfr16BitInt(d_iterations);
rtr.xfrHexBlob(d_salt);
}
void NSEC3PARAMRecordContent::toPacket(DNSPacketWriter& pw)
{
pw.xfr8BitInt(d_algorithm);
pw.xfr8BitInt(d_flags);
pw.xfr16BitInt(d_iterations);
pw.xfr8BitInt(d_salt.length());
// cerr<<"salt: '"<<makeHexDump(d_salt)<<"', "<<d_salt.length()<<endl;
pw.xfrBlob(d_salt);
}
NSEC3PARAMRecordContent::DNSRecordContent* NSEC3PARAMRecordContent::make(const DNSRecord &dr, PacketReader& pr)
{
NSEC3PARAMRecordContent* ret=new NSEC3PARAMRecordContent();
pr.xfr8BitInt(ret->d_algorithm);
pr.xfr8BitInt(ret->d_flags);
pr.xfr16BitInt(ret->d_iterations);
pr.xfr8BitInt(ret->d_saltlength);
pr.xfrHexBlob(ret->d_salt);
return ret;
}
string NSEC3PARAMRecordContent::getZoneRepresentation() const
{
string ret;
RecordTextWriter rtw(ret);
rtw.xfr8BitInt(d_algorithm);
rtw.xfr8BitInt(d_flags);
rtw.xfr16BitInt(d_iterations);
rtw.xfrHexBlob(d_salt);
return ret;
}
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