--warn_printbadcsum This option needs to be given along with
the -checksum option, and prints the packet numbers of the packets
in the dumpfile that had bad IP and TCP/UDP checksums. The following example
illustrates this :
alakhian@spider:% tcptrace --warn_printbadcsum --checksum input/bad_tcp_checksum.dmp.gz
packet 1: bad TCP checksum
1 arg remaining, starting with 'input/bad_tcp_checksum.dmp.gz'
Ostermann's tcptrace -- version 6.2.6 -- Thu Nov 14, 2002
10 packets seen, 9 TCP packets traced
elapsed wallclock time: 0:00:00.057058, 175 pkts/sec analyzed
trace file elapsed time: 0:00:00.012379
bad IP checksums: 0
bad TCP checksums: 1
TCP connection info:
1: analex093.lerc.nasa.gov:2270 - chipper.lerc.nasa.gov:139 (a2b) 3> 6<