DatagramPacket outPacket = new DatagramPacket(new byte[0], 0, 0 /* length */, destAddr, parsedUdp.getHeader().getDstPort().valueAsInt()); eventLoop.forwardPacket(outPacket, null); return; if (!ruleDatabase.isBlocked(dnsQueryName.toLowerCase(Locale.ENGLISH))) { Log.i(TAG, "handleDnsRequest: DNS Name " + dnsQueryName + " Allowed, sending to " + destAddr); DatagramPacket outPacket = new DatagramPacket(dnsRawData, 0, dnsRawData.length, destAddr, parsedUdp.getHeader().getDstPort().valueAsInt()); eventLoop.forwardPacket(outPacket, parsedPacket); } else {
@Test public void testGetHeader() { UdpHeader h = packet.getHeader(); assertEquals(srcPort, h.getSrcPort()); assertEquals(dstPort, h.getDstPort()); assertEquals(length, h.getLength()); assertEquals(checksum, h.getChecksum()); UdpPacket.Builder b = packet.getBuilder(); UdpPacket p; b.length((short) 0); p = b.build(); assertEquals((short) 0, (short) p.getHeader().getLengthAsInt()); b.length((short) -1); p = b.build(); assertEquals((short) -1, (short) p.getHeader().getLengthAsInt()); b.length((short) 32767); p = b.build(); assertEquals((short) 32767, (short) p.getHeader().getLengthAsInt()); b.length((short) -32768); p = b.build(); assertEquals((short) -32768, (short) p.getHeader().getLengthAsInt()); }
UdpPacket udpOutPacket = (UdpPacket) requestPacket.getPayload(); UdpPacket.Builder payLoadBuilder = new UdpPacket.Builder(udpOutPacket) .srcPort(udpOutPacket.getHeader().getDstPort()) .dstPort(udpOutPacket.getHeader().getSrcPort()) .srcAddr(requestPacket.getHeader().getDstAddr()) .dstAddr(requestPacket.getHeader().getSrcAddr())
@Test public void testHasValidChecksumFFFF() throws Exception { PcapHandle pcapHandle = Pcaps.openOffline(resourceDirPath.concat("/UdpPacketTestChecksum0xFFFF.pcap")); Packet packet = pcapHandle.getNextPacket(); assertNotNull(packet); assertTrue(packet.contains(IpV4Packet.class)); IpV4Packet ipV4Packet = packet.get(IpV4Packet.class); assertNotNull(ipV4Packet); IpV4Packet.IpV4Header ipV4Header = ipV4Packet.getHeader(); assertNotNull(ipV4Header); assertTrue(ipV4Packet.contains(UdpPacket.class)); UdpPacket udpPacket = ipV4Packet.get(UdpPacket.class); assertNotNull(udpPacket); assertEquals((short) 0xFFFF, udpPacket.getHeader().getChecksum()); assertTrue(udpPacket.hasValidChecksum(ipV4Header.getSrcAddr(), ipV4Header.getDstAddr(), false)); }
private void consumeUdp(Packet packet, NetworkInterface getter) { if (agent == null || !agent.isRunning()) { if (LOGGER.isDebugEnabled()) { LOGGER.debug("Not listening SNMP. Dropped a packet: " + packet); } return; } UdpPacket udpPacket = packet.get(UdpPacket.class); SneoUdpTransportMapping tm = (SneoUdpTransportMapping)agent.getTransportMapping(); if ( (udpPacket.getHeader().getDstPort().value() & 0xFFFF) == tm.getAddress().getPort() ) { agent.getContextfulWorkerPool() .registerContext(new SnmpContext(packet, getter)); tm.processMessage(packet); } else { if (LOGGER.isDebugEnabled()) { StringBuilder sb = new StringBuilder(); sb.append("Dropped a packet not to me(") .append(tm.getAddress().getPort()) .append("): ") .append(packet); LOGGER.debug(sb.toString()); } } }
public void processMessage(Packet packet) { UdpPacket udpPacket = packet.get(UdpPacket.class); byte[] snmpMessage = udpPacket.getPayload().getRawData(); InetAddress srcAddr; IpV4Packet ipV4Packet = packet.get(IpV4Packet.class); if (ipV4Packet != null) { srcAddr = ipV4Packet.getHeader().getSrcAddr(); } else { srcAddr = packet.get(IpV6Packet.class).getHeader().getSrcAddr(); } int srcPort = udpPacket.getHeader().getSrcPort().value() & 0xFFFF; ByteBuffer bis; if (isAsyncMsgProcessingSupported()) { byte[] rawData = new byte[snmpMessage.length]; System.arraycopy(snmpMessage, 0, rawData, 0, rawData.length); bis = ByteBuffer.wrap(rawData); } else { bis = ByteBuffer.wrap(snmpMessage); } fireProcessMessage( new UdpAddress(srcAddr, srcPort), bis ); }
.getDstAddr(); srcPort = context.getRequestPacket().get(UdpPacket.class).getHeader() .getDstPort().value() & 0xFFFF;