Created
July 9, 2014 04:23
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Quick & naive upload traffic limit
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#!/usr/bin/env ruby | |
# quick egress traffic limit for linux | |
# Usage: $0 dev kbps | |
MIN_RATE = 512 | |
devs = [] | |
rate = 0 | |
dev_names = Dir['/sys/devices/**/net/*'].map{|x|File.basename(x)} | |
ARGV.each do |v| | |
if dev_names.include? v | |
devs.push v | |
else | |
rate = v.to_i | |
end | |
end | |
rate = MIN_RATE if rate < MIN_RATE && rate >= 0 | |
if devs.empty? | |
puts "Usage: #$0 [dev1] [dev2] [kbps=#{MIN_RATE}]" | |
puts " #$0 eth0 # limit eth0 upload speed to #{MIN_RATE}kbps" | |
puts " #$0 eth0 eth1 256 # limit eth0 and eth1 upload speed to 256kbps" | |
puts " #$0 eth0 -1 # unlimit eth0 upload speed" | |
end | |
sudo_prefix = Process.uid == 0 ? '' : 'sudo ' | |
devs.each do |dev| | |
system "#{sudo_prefix} tc qdisc del dev #{dev} root >/dev/null 2>/dev/null" | |
if rate < 0 | |
puts "Unlimit #{dev}" | |
else | |
puts "Limit #{dev} to #{rate}kbps" | |
system "#{sudo_prefix} tc qdisc add dev #{dev} root tbf rate #{rate}kbit latency 500ms burst #{rate * 3 / 2}kbit" | |
end | |
end |
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