Esempio n. 1
0
  /* Returns true if the message could be rendered. */
  private boolean toWire(DNSOutput out, int maxLength) {
    if (maxLength < Header.LENGTH) return false;

    Header newheader = null;

    int tempMaxLength = maxLength;
    if (tsigkey != null) tempMaxLength -= tsigkey.recordLength();

    int startpos = out.current();
    header.toWire(out);
    Compression c = new Compression();
    for (int i = 0; i < 4; i++) {
      int skipped;
      if (sections[i] == null) continue;
      skipped = sectionToWire(out, i, c, tempMaxLength);
      if (skipped != 0) {
        if (i != Section.ADDITIONAL) {
          if (newheader == null) newheader = (Header) header.clone();
          newheader.setFlag(Flags.TC);
          int count = newheader.getCount(i);
          newheader.setCount(i, count - skipped);
          for (int j = i + 1; j < 4; j++) newheader.setCount(j, 0);

          out.save();
          out.jump(startpos);
          newheader.toWire(out);
          out.restore();
        }
        break;
      }
    }

    if (tsigkey != null) {
      TSIGRecord tsigrec = tsigkey.generate(this, out.toByteArray(), tsigerror, querytsig);

      if (newheader == null) newheader = (Header) header.clone();
      tsigrec.toWire(out, Section.ADDITIONAL, c);
      newheader.incCount(Section.ADDITIONAL);

      out.save();
      out.jump(startpos);
      newheader.toWire(out);
      out.restore();
    }

    return true;
  }
 void toWire(DNSOutput out, int section, Compression c) {
   name.toWire(out, c);
   out.writeU16(type);
   out.writeU16(dclass);
   if (section == Section.QUESTION) return;
   out.writeU32(ttl);
   int lengthPosition = out.current();
   out.writeU16(0); /* until we know better */
   rrToWire(out, c, false);
   int rrlength = out.current() - lengthPosition - 2;
   out.save();
   out.jump(lengthPosition);
   out.writeU16(rrlength);
   out.restore();
 }
 private void toWireCanonical(DNSOutput out, boolean noTTL) {
   name.toWireCanonical(out);
   out.writeU16(type);
   out.writeU16(dclass);
   if (noTTL) {
     out.writeU32(0);
   } else {
     out.writeU32(ttl);
   }
   int lengthPosition = out.current();
   out.writeU16(0); /* until we know better */
   rrToWire(out, null, true);
   int rrlength = out.current() - lengthPosition - 2;
   out.save();
   out.jump(lengthPosition);
   out.writeU16(rrlength);
   out.restore();
 }