This is automatically generated documentation. Edit after the "COMMENTS" heading; changes to the main body will be lost.
StoreUDPTimeSeqRecord -- Click element;
StoreUDPTimeSeqRecord([keywords OFFSET, DELTA])
Ports: 1 input, 1 output
Package: analysis (core)
StoreUDPTimeSeqRecord element can be handy when computing end-to-end UDP packet delays. The element embeds a timestamp and a sequence number into a packet and adjusts the checksum of the UDP packet. Once the initial timestamp has been placed into the payload of the UDP packet, a time difference can be computed once a packet passes through another StoreUDPTimeSeqRecord element. The data can be accessed by examining the packet payload (e.g., do a tcpdump and then do post processing of the data). The element uses partial checksums to speed up the processing. The element works with IPv4 and IPv6 packets. In case of IPv6, it assumes that the next header field is UDP. If this is not the case, the element will discard the packet. Packet payload found after the UDP header. Note, the UDP payload must be at least 22 bytes long. The values will be stored in network byte order. uint32_t seq_num uint32_t initial_second uint32_t initial_nano_second uint32_t difference_second uint32_t difference_nano_second Keyword arguments are:
src :: RatedSource(\<00>, LENGTH 22, RATE 1, LIMIT 100) -> UDPIPEncap(10.0.1.1, 6667, 18.104.22.168, 6667) -> EtherEncap(0x0800, 00:04:23:D0:93:63, 00:17:cb:0d:f8:db) -> StoreUDPTimeSeqRecord(OFFSET 14, DELTA false) -> DelayShaper(100msec) -> StoreUDPTimeSeqRecord(OFFSET 14, DELTA true) -> ToDump("dump.dmp");
Generated by 'click-elem2man' from '../elements/analysis/storeudptimeseqrecord.hh:22' on 12/Jul/2011.