return false;
}
@Override
protected void processPacketPayload(Packet packet, byte[] payload) {
DnsPacket dnsPacket = (DnsPacket)packet;
if (DNS_PORT == (Integer)packet.get(Packet.SRC_PORT) || DNS_PORT == (Integer)packet.get(Packet.DST_PORT)) {
if (PROTOCOL_TCP.equals(packet.get(Packet.PROTOCOL)) &&
payload.length > 2) // TODO Support DNS responses with multiple messages (as used for XFRs)
payload = Arrays.copyOfRange(payload, 2, payload.length); // First two bytes denote the size of the DNS message, ignore them
try {
Message msg = new Message(payload);
Header header = msg.getHeader();
dnsPacket.put(DnsPacket.QUERYID, header.getID());
dnsPacket.put(DnsPacket.FLAGS, header.printFlags());
dnsPacket.put(DnsPacket.QR, header.getFlag(Flags.QR));
dnsPacket.put(DnsPacket.OPCODE, Opcode.string(header.getOpcode()));
dnsPacket.put(DnsPacket.RCODE, Rcode.string(header.getRcode()));
dnsPacket.put(DnsPacket.QUESTION, convertRecordToString(msg.getQuestion()));
dnsPacket.put(DnsPacket.QNAME, convertRecordOwnerToString(msg.getQuestion()));
dnsPacket.put(DnsPacket.QTYPE, convertRecordTypeToInt(msg.getQuestion()));
dnsPacket.put(DnsPacket.ANSWER, convertRecordsToStrings(msg.getSectionArray(Section.ANSWER)));
dnsPacket.put(DnsPacket.AUTHORITY, convertRecordsToStrings(msg.getSectionArray(Section.AUTHORITY)));
dnsPacket.put(DnsPacket.ADDITIONAL, convertRecordsToStrings(msg.getSectionArray(Section.ADDITIONAL)));
} catch (Exception e) {
// If we cannot decode a DNS packet we ignore it
}
}
}