code.delx.au - monosys/blob - shaper

   1 #!/bin/bash
   2
   3 # Docs: http://lartc.org/howto
   4
   5 # Tweakables
   6 IFACE="ppp0"
   7 VOIP_HOST="$(dig +short sip.internode.on.net)"
   8
   9 UPLINK_RATE=450
  10
  11 VOIP_RATE=70
  12 HIGH_RATE=130
  13 NORM_RATE=240
  14 BULK_RATE=10
  15
  16
  17 # Symbolic 'constants'
  18 ROOT=1
  19 LIMIT=1
  20 VOIP_TRAFFIC=10
  21 HIGH_TRAFFIC=20
  22 NORM_TRAFFIC=30
  23 BULK_TRAFFIC=40
  24
  25
  26 # Print status of classes
  27 if [ "$1" = "status" ]; then
  28     tc -s qdisc ls dev ${IFACE}
  29     tc -s class ls dev ${IFACE}
  30     exit
  31 fi
  32
  33 set -x
  34
  35 # clean existing down- and uplink qdiscs, hide errors
  36 tc qdisc del dev ${IFACE} root    2> /dev/null > /dev/null
  37 tc qdisc del dev ${IFACE} ingress 2> /dev/null > /dev/null
  38
  39 if [ "$1" = "stop" ]; then
  40     exit
  41 fi
  42
  43 cd /
  44
  45
  46 ########## uplink #############
  47
  48 # install root HTB, point default traffic to NORM_TRAFFIC
  49 tc qdisc add dev ${IFACE} \
  50     root handle ${ROOT}:0 \
  51     htb default ${NORM_TRAFFIC}
  52
  53
  54 # LIMIT class shapes everything at $UPLINK_RATE speed
  55 # this prevents huge queues in the DSL modem which destroy latency
  56 tc class add dev ${IFACE} \
  57     parent ${ROOT}:0 classid ${ROOT}:${LIMIT} \
  58     htb rate ${UPLINK_RATE}Kbit ceil ${UPLINK_RATE}Kbit
  59
  60
  61 # VoIP traffic class gets guaranteed bandwidth
  62 tc class add dev ${IFACE} \
  63     parent ${ROOT}:${LIMIT} classid ${ROOT}:${VOIP_TRAFFIC} \
  64     htb rate ${VOIP_RATE}Kbit ceil ${UPLINK_RATE}Kbit prio 0
  65
  66 # High priority traffic
  67 tc class add dev ${IFACE} \
  68     parent ${ROOT}:${LIMIT} classid ${ROOT}:${HIGH_TRAFFIC} \
  69     htb rate ${HIGH_RATE}Kbit ceil ${UPLINK_RATE}Kbit prio 1
  70
  71 # Normal priority traffic
  72 tc class add dev ${IFACE} \
  73     parent ${ROOT}:${LIMIT} classid ${ROOT}:${NORM_TRAFFIC} \
  74     htb rate ${NORM_RATE}Kbit ceil ${UPLINK_RATE}Kbit prio 2
  75
  76 # Bulk traffic gets little default allowance
  77 tc class add dev ${IFACE} \
  78     parent ${ROOT}:${LIMIT} classid ${ROOT}:${BULK_TRAFFIC} \
  79     htb rate ${BULK_RATE}Kbit ceil ${UPLINK_RATE}Kbit prio 3
  80
  81
  82 # Stochastic Fairness
  83 tc qdisc add dev ${IFACE} \
  84     parent ${ROOT}:${HIGH_TRAFFIC} handle ${HIGH_TRAFFIC}:0 \
  85     sfq perturb 10
  86 tc qdisc add dev ${IFACE} \
  87     parent ${ROOT}:${NORM_TRAFFIC} handle ${NORM_TRAFFIC}:0 \
  88     sfq perturb 10
  89 tc qdisc add dev ${IFACE} \
  90     parent ${ROOT}:${BULK_TRAFFIC} handle ${BULK_TRAFFIC}:0 \
  91     sfq perturb 10
  92
  93
  94 # Match VoIP traffic as highest priority
  95 tc filter add dev ${IFACE} \
  96     parent ${ROOT}:0 protocol ip prio 10 u32 \
  97     match ip dst ${VOIP_HOST} flowid ${ROOT}:${VOIP_TRAFFIC}
  98
  99 # ICMP in the HIGH_TRAFFIC class
 100 tc filter add dev ${IFACE} \
 101     parent ${ROOT}:0 protocol ip prio 10 u32 \
 102     match ip protocol 1 0xff flowid ${ROOT}:${HIGH_TRAFFIC}
 103
 104 # To speed up downloads while an upload is going on, ACK is HIGH_TRAFFIC
 105 tc filter add dev ${IFACE} \
 106     parent ${ROOT}:0 protocol ip prio 10 u32 \
 107     match ip protocol 6 0xff \
 108     match u8 0x05 0x0f at 0 \
 109     match u16 0x0000 0xffc0 at 2 \
 110     match u8 0x10 0xff at 33 \
 111     flowid ${ROOT}:${HIGH_TRAFFIC}
 112
 113 # TOS Minimum-Delay (eg ssh but not scp) in HIGH_TRAFFIC
 114 tc filter add dev ${IFACE} \
 115     parent ${ROOT}:0 protocol ip prio 10 u32 \
 116     match ip tos 0x10 0xff flowid ${ROOT}:${HIGH_TRAFFIC}
 117
 118 # TOS Maximise-Throughput (eg rtorrent) in BULK_TRAFFIC
 119 tc filter add dev ${IFACE} \
 120     parent ${ROOT}:0 protocol ip prio 10 u32 \
 121     match ip tos 0x08 0xff flowid ${ROOT}:${BULK_TRAFFIC}
 122