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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 protocol ip 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
}
}
}
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