/* Returns the number of records not successfully rendered. */ private int sectionToWire(DNSOutput out, int section, Compression c, int maxLength) { int n = sections[section].size(); int pos = out.current(); int rendered = 0; int skipped = 0; Record lastrec = null; for (int i = 0; i < n; i++) { Record rec = (Record) sections[section].get(i); if (section == Section.ADDITIONAL && rec instanceof OPTRecord) { skipped++; continue; } if (lastrec != null && !sameSet(rec, lastrec)) { pos = out.current(); rendered = i; } lastrec = rec; rec.toWire(out, section, c); if (out.current() > maxLength) { out.jump(pos); return n - rendered + skipped; } } return skipped; }
void rrToWire(DNSOutput out, Compression c, boolean canonical) { if (options == null) return; Iterator it = options.iterator(); while (it.hasNext()) { Option opt = (Option) it.next(); out.writeU16(opt.code); out.writeU16(opt.data.length); out.writeByteArray(opt.data); } }
private static void mapToWire(DNSOutput out, TreeSet map, int mapbase) { int arraymax = (((Integer) map.last()).intValue()) & 0xFF; int arraylength = (arraymax / 8) + 1; int[] array = new int[arraylength]; out.writeU8(mapbase); out.writeU8(arraylength); for (Iterator it = map.iterator(); it.hasNext(); ) { int typecode = ((Integer) it.next()).intValue(); array[(typecode & 0xFF) / 8] |= (1 << (7 - typecode % 8)); } for (int j = 0; j < arraylength; j++) out.writeU8(array[j]); }
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(); }
/* 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 number of records not successfully rendered. */ private int sectionToWire(DNSOutput out, int section, Compression c, int maxLength) { int n = sections[section].size(); int pos = out.current(); int rendered = 0; Record lastrec = null; for (int i = 0; i < n; i++) { Record rec = (Record) sections[section].get(i); if (lastrec != null && !sameSet(rec, lastrec)) { pos = out.current(); rendered = i; } lastrec = rec; rec.toWire(out, section, c); if (out.current() > maxLength) { out.jump(pos); return n - rendered; } } return 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; }
/** * Returns an array containing the wire format representation of the Message with the specified * maximum length. This will generate a truncated message (with the TC bit) if the message doesn't * fit, and will also sign the message with the TSIG key set by a call to setTSIG(). This method * may return null if the message could not be rendered at all; this could happen if maxLength is * smaller than a DNS header, for example. * * @param maxLength The maximum length of the message. * @return The wire format of the message, or null if the message could not be rendered into the * specified length. * @see Flags * @see TSIG */ public byte[] toWire(int maxLength) { DNSOutput out = new DNSOutput(); toWire(out, maxLength); size = out.current(); return out.toByteArray(); }
/** Returns an array containing the wire format representation of the Message. */ public byte[] toWire() { DNSOutput out = new DNSOutput(); toWire(out); size = out.current(); return out.toByteArray(); }
/** * Converts the rdata in a Record into canonical DNS uncompressed wire format (all names are * converted to lowercase). */ public byte[] rdataToWireCanonical() { DNSOutput out = new DNSOutput(); rrToWire(out, null, true); return out.toByteArray(); }
/* * Converts a Record into canonical DNS uncompressed wire format (all names are * converted to lowercase), optionally ignoring the TTL. */ private byte[] toWireCanonical(boolean noTTL) { DNSOutput out = new DNSOutput(); toWireCanonical(out, noTTL); return out.toByteArray(); }
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(); }
/** Converts a Record into DNS uncompressed wire format. */ public byte[] toWire(int section) { DNSOutput out = new DNSOutput(); toWire(out, section, null); return out.toByteArray(); }