/** Converts the Message to a String. */
public String toString() {
StringBuffer sb = new StringBuffer();
OPTRecord opt = getOPT();
if (opt != null) sb.append(header.toStringWithRcode(getRcode()) + "\n");
else sb.append(header + "\n");
if (isSigned()) {
sb.append(";; TSIG ");
if (isVerified()) sb.append("ok");
else sb.append("invalid");
sb.append('\n');
}
if (opt != null) {
sb.append(";; OPT PSEUDOSECTION:\n");
sb.append("; EDNS: version: ");
sb.append(opt.getVersion());
sb.append(", flags:");
if ((opt.getFlags() & ExtendedFlags.DO) != 0) {
sb.append(" do");
}
sb.append("; udp: ");
sb.append(opt.getPayloadSize());
sb.append("\n");
}
for (int i = 0; i < 4; i++) {
if (header.getOpcode() != Opcode.UPDATE) sb.append(";; " + Section.longString(i) + ":\n");
else sb.append(";; " + Section.updString(i) + ":\n");
sb.append(sectionToString(i) + "\n");
}
sb.append(";; Message size: " + numBytes() + " bytes");
return sb.toString();
}
/* 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();
OPTRecord opt = getOPT();
byte[] optBytes = null;
if (opt != null) {
optBytes = opt.toWire(Section.ADDITIONAL);
tempMaxLength -= optBytes.length;
}
int startpos = out.current();
header.toWire(out);
Compression c = new Compression();
int flags = header.getFlagsByte();
int additionalCount = 0;
for (int i = 0; i < 4; i++) {
int skipped;
if (sections[i] == null) continue;
skipped = sectionToWire(out, i, c, tempMaxLength);
if (skipped != 0 && i != Section.ADDITIONAL) {
flags = Header.setFlag(flags, Flags.TC, true);
out.writeU16At(header.getCount(i) - skipped, startpos + 4 + 2 * i);
for (int j = i + 1; j < Section.ADDITIONAL; j++) out.writeU16At(0, startpos + 4 + 2 * j);
break;
}
if (i == Section.ADDITIONAL) additionalCount = header.getCount(i) - skipped;
}
if (optBytes != null) {
out.writeByteArray(optBytes);
additionalCount++;
}
if (flags != header.getFlagsByte()) out.writeU16At(flags, startpos + 2);
if (additionalCount != header.getCount(Section.ADDITIONAL))
out.writeU16At(additionalCount, startpos + 10);
if (tsigkey != null) {
TSIGRecord tsigrec = tsigkey.generate(this, out.toByteArray(), tsigerror, querytsig);
tsigrec.toWire(out, Section.ADDITIONAL, c);
out.writeU16At(additionalCount + 1, startpos + 10);
}
return true;
}
/** Returns the message's rcode (error code). This incorporates the EDNS extended rcode. */
public int getRcode() {
int rcode = header.getRcode();
OPTRecord opt = getOPT();
if (opt != null) rcode += (opt.getExtendedRcode() << 4);
return rcode;
}
private int maxUDPSize(Message query) {
OPTRecord opt = query.getOPT();
if (opt == null) return DEFAULT_UDPSIZE;
else return opt.getPayloadSize();
}