/**
Return 1 on success, 0 on failure.
*/
int _rrparse(struct message *m, struct resource *rr, int count, unsigned char **bufp)
{
int i;
for(i=0; i < count; i++)
{
_label(m, bufp, &(rr[i].name));
rr[i].type = net2short(bufp);
rr[i].rr_class = net2short(bufp);
rr[i].ttl = net2long(bufp);
rr[i].rdlength = net2short(bufp);
// if not going to overflow, make copy of source rdata
if(rr[i].rdlength + (*bufp - m->_buf) > MAX_PACKET_LEN || m->_len + rr[i].rdlength > MAX_PACKET_LEN) return 0;
rr[i].rdata = m->_packet + m->_len;
m->_len += rr[i].rdlength;
memcpy(rr[i].rdata,*bufp,rr[i].rdlength);
// parse commonly known ones
switch(rr[i].type)
{
case 1:
if(m->_len + 16 > MAX_PACKET_LEN) return 0;
rr[i].known.a.name = m->_packet + m->_len;
m->_len += 16;
sprintf(rr[i].known.a.name,"%d.%d.%d.%d",(*bufp)[0],(*bufp)[1],(*bufp)[2],(*bufp)[3]);
rr[i].known.a.ip = net2long(bufp);
break;
case 2:
_label(m, bufp, &(rr[i].known.ns.name));
break;
case 5:
_label(m, bufp, &(rr[i].known.cname.name));
break;
case 12:
_label(m, bufp, &(rr[i].known.ptr.name));
break;
case 33:
rr[i].known.srv.priority = net2short(bufp);
rr[i].known.srv.weight = net2short(bufp);
rr[i].known.srv.port = net2short(bufp);
_label(m, bufp, &(rr[i].known.srv.name));
break;
default:
*bufp += rr[i].rdlength;
}
}
return 1;
}
void message_parse(struct message *m, unsigned char *packet)
{
unsigned char *buf;
int i;
if(packet == 0 || m == 0) return;
// keep all our mem in one (aligned) block for easy freeing
#define my(x,y) while(m->_len&7) m->_len++; x = (void*)(m->_packet + m->_len); m->_len += y;
// header stuff bit crap
m->_buf = buf = packet;
m->id = net2short(&buf);
if(buf[0] & 0x80) m->header.qr = 1;
m->header.opcode = (buf[0] & 0x78) >> 3;
if(buf[0] & 0x04) m->header.aa = 1;
if(buf[0] & 0x02) m->header.tc = 1;
if(buf[0] & 0x01) m->header.rd = 1;
if(buf[1] & 0x80) m->header.ra = 1;
m->header.z = (buf[1] & 0x70) >> 4;
m->header.rcode = buf[1] & 0x0F;
buf += 2;
m->qdcount = net2short(&buf);
if(m->_len + (sizeof(struct question) * m->qdcount) > MAX_PACKET_LEN - 8) { m->qdcount = 0; return; }
m->ancount = net2short(&buf);
if(m->_len + (sizeof(struct resource) * m->ancount) > MAX_PACKET_LEN - 8) { m->ancount = 0; return; }
m->nscount = net2short(&buf);
if(m->_len + (sizeof(struct resource) * m->nscount) > MAX_PACKET_LEN - 8) { m->nscount = 0; return; }
m->arcount = net2short(&buf);
if(m->_len + (sizeof(struct resource) * m->arcount) > MAX_PACKET_LEN - 8) { m->arcount = 0; return; }
// process questions
my(m->qd, sizeof(struct question) * m->qdcount);
for(i=0; i < m->qdcount; i++)
{
_label(m, &buf, &(m->qd[i].name));
m->qd[i].type = net2short(&buf);
m->qd[i].rr_class = net2short(&buf);
}
// process rrs
my(m->an, sizeof(struct resource) * m->ancount);
my(m->ns, sizeof(struct resource) * m->nscount);
my(m->ar, sizeof(struct resource) * m->arcount);
if(! _rrparse(m,m->an,m->ancount,&buf))
m->ancount = 0; // some error in parsing, set those counts to 0
if(! _rrparse(m,m->ns,m->nscount,&buf))
m->nscount = 0;
if(! _rrparse(m,m->ar,m->arcount,&buf))
m->arcount = 0;
}
void MT_ExperimentDataFile::registerFile(
const char* label,
const char* filename)
{
std::string _label(label);
std::string _filename(filename);
/* the label can't have any spaces */
_label = MT_ReplaceSpacesInString(_label);
/* store the filename as relative to the XDF */
std::string rel_filename = MT_CalculateRelativePath(filename,
m_XMLFile.GetFilename());
MT_AddOrReplaceNodeValue(getFilesNode(), _label.c_str(), rel_filename.c_str());
}
bool MT_ExperimentDataFile::writeParameterToXML(const char* param_name,
const char* value)
{
if(m_bStatus == MT_XDF_ERROR)
{
return setError();
}
std::string _label(param_name);
/* the label can't have any spaces */
_label = MT_ReplaceSpacesInString(_label);
MT_AddOrReplaceNodeValue(getParametersNode(), _label.c_str(), value);
/* save the file */
m_XMLFile.SaveFile();
return setOK();
}
