OpenWrt – Rev 4

Subversion Repositories:
Rev:
BEGIN {
        dmax=100
        if (!(linespeed > 0)) linespeed = 128
        FS=":"
        n = 0
}

($1 != "") {
        n++
        class[n] = $1
        prio[n] = $2
        avgrate[n] = ($3 * linespeed / 100)
        pktsize[n] = $4
        delay[n] = $5
        maxrate[n] = ($6 * linespeed / 100)
        qdisc[n] = $7
        filter[n] = $8
}

END {
        allocated = 0
        maxdelay = 0

        for (i = 1; i <= n; i++) {
                # set defaults
                if (!(pktsize[i] > 0)) pktsize[i] = 1500
                if (!(prio[i] > 0)) prio[i] = 1

                allocated += avgrate[i]
                sum_prio += prio[i]
                if ((avgrate[i] > 0) && !(delay[i] > 0)) {
                        sum_rtprio += prio[i]
                }
        }

        # allocation of m1 in rt classes:
        # sum(d * m1) must not exceed dmax * (linespeed - allocated)
        dmax = 0
        for (i = 1; i <= n; i++) {
                if (avgrate[i] > 0) {
                        rtm2[i] = avgrate[i]
                        if (delay[i] > 0) {
                                d[i] = delay[i]
                        } else {
                                d[i] = 2 * pktsize[i] * 1000 / (linespeed * 1024)
                                if (d[i] > dmax) dmax = d[i]
                        }
                }
        }

        ds_avail = dmax * (linespeed - allocated)
        for (i = 1; i <= n; i++) {
                lsm1[i] = 0
                rtm1[i] = 0
                lsm2[i] = linespeed * prio[i] / sum_prio
                if ((avgrate[i] > 0) && (d[i] > 0)) {
                        if (!(delay[i] > 0)) {
                                ds = ds_avail * prio[i] / sum_rtprio
                                ds_avail -= ds
                                rtm1[i] = rtm2[i] + ds/d[i]
                        }
                        lsm1[i] = rtm1[i]
                }
                else {
                        d[i] = 0
                }
        }

        # main qdisc
        for (i = 1; i <= n; i++) {
                printf "tc class add dev "device" parent 1:1 classid 1:"class[i]"0 hfsc"
                if (rtm1[i] > 0) {
                        printf " rt m1 " int(rtm1[i]) "kbit d " int(d[i] * 1000) "us m2 " int(rtm2[i])"kbit"
                }
                printf " ls m1 " int(lsm1[i]) "kbit d " int(d[i] * 1000) "us m2 " int(lsm2[i]) "kbit"
                print " ul rate " int(maxrate[i]) "kbit"
        }

        # leaf qdisc
        avpkt = 1200
        for (i = 1; i <= n; i++) {
                print "tc qdisc add dev "device" parent 1:"class[i]"0 handle "class[i]"00: fq_codel limit 800 quantum 300 noecn"
        }

        # filter rule
        for (i = 1; i <= n; i++) {
                filter_cmd = "tc filter add dev "device" parent 1: prio %d handle %s fw flowid 1:%d0\n";
                if (direction == "up") {
                        filter_1 = sprintf("0x%x0/0xf0", class[i])
                        filter_2 = sprintf("0x0%x/0x0f", class[i])
                } else {
                        filter_1 = sprintf("0x0%x/0x0f", class[i])
                        filter_2 = sprintf("0x%x0/0xf0", class[i])
                }

                printf filter_cmd, class[i] * 2, filter_1, class[i]
                printf filter_cmd, class[i] * 2 + 1, filter_2, class[i]

                filterc=1
                if (filter[i] != "") {
                        print " tc filter add dev "device" parent "class[i]"00: handle "filterc"0 "filter[i]
                        filterc=filterc+1
                }
        }
}