nexmon – Rev 1

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$6 ~ /^ack/ && $5 !~ /[SFR]/    {
        # given a tcpdump ftp trace, output one line for each ack
        # in the form
        #   <ack time> <seq no>
        # where <ack time> is the time packet was acked (in seconds with
        # zero at time of first packet) and <seq no> is the tcp sequence
        # number of the ack divided by 1024 (i.e., Kbytes acked).
        #
        # convert time to seconds
        n = split ($1,t,":")
        tim = t[1]*3600 + t[2]*60 + t[3]
        if (! tzero) {
                tzero = tim
                OFS = "\t"
        }
        # get packet sequence number
        printf "%7.2f\t%g\n", tim-tzero, $7/1024
        }