UDPspeeder

Network Speed-Up Tool. Boost your Connection on a High Lantency High Packet-Loss Link by using Forward Error Correction.

When used alone,UDPspeeder speeds-up only UDP connection.Nevertheless,if you used UDPspeeder + any UDP-based VPN together,you can speed-up any traffic(include TCP/UDP/ICMP)。

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简体中文

Efficacy

tested on a link with 100ms latency and 10% packet loss at both direction

Ping Packet Loss

SCP Copy Speed

Supported Platforms

Linux host (including desktop Linux,Android phone/tablet,OpenWRT router,or Raspberry PI).

For Windows and MacOS You can run UDPspeeder inside this 7.5mb virtual machine image.

How does it work

UDPspeeder uses FEC(Forward Error Correction) to improve your connection's quality,at the cost of addtional bandwidth.The algorithm for FEC is called Reed-Solomon.

Reed-Solomon

In coding theory, the Reed–Solomon code belongs to the class of non-binary cyclic error-correcting codes. The Reed–Solomon code is based on univariate polynomials over finite fields.

It is able to detect and correct multiple symbol errors. By adding t check symbols to the data, a Reed–Solomon code can detect any combination of up to t erroneous symbols, or correct up to ⌊t/2⌋ symbols. As an erasure code, it can correct up to t known erasures, or it can detect and correct combinations of errors and erasures. Reed–Solomon codes are also suitable as multiple-burst bit-error correcting codes, since a sequence of b + 1 consecutive bit errors can affect at most two symbols of size b. The choice of t is up to the designer of the code, and may be selected within wide limits.

Check wikipedia for more info, https://en.wikipedia.org/wiki/Reed–Solomon_error_correction

Getting Started

Installing

Download binary release from https://github.com/wangyu-/UDPspeeder/releases

Running (speed-up UDP only)

Assume your server ip is 44.55.66.77, you have a service listening on udp port 7777.

# Run at server side:
./speederv2 -s -l0.0.0.0:4096 -r 127.0.0.1:7777  -f20:10

# Run at client side
./speederv2 -c -l0.0.0.0:3333  -r44.55.66.77:4096 -f20:10

Now connecting to UDP port 3333 at the client side is equivalent to connecting to port 7777 at the server side,and the connection is boosted by UDPspeeder.

Note

-f20:10 means sending 10 redundant packets for every 20 original packets.

Advanced Topic

Full Options

UDPspeeder V2
git version:f479ca2779    build date:Oct 19 2017 01:37:08
repository: https://github.com/wangyu-/UDPspeeder

usage:
    run as client : ./this_program -c -l local_listen_ip:local_port -r server_ip:server_port  [options]
    run as server : ./this_program -s -l server_listen_ip:server_port -r remote_ip:remote_port  [options]

common option,must be same on both sides:
    -k,--key              <string>        key for simple xor encryption. if not set,xor is disabled
main options:
    -f,--fec              x:y             forward error correction,send y redundant packets for every x packets
    --timeout             <number>        how long could a packet be held in queue before doing fec,unit: ms
    --mode                <number>        fec-mode,available values: 0,1 ; 0 cost less bandwidth,1 cost less latency
    --report              <number>        turn on send/recv report,and set a period for reporting,unit:s
advanced options:
    --mtu                 <number>        mtu. for mode 0,the program will split packet to segment smaller than mtu_value.
                                          for mode 1,no packet will be split,the program just check if the mtu is exceed.
                                          default value:1250 
    -j,--jitter           <number>        simulated jitter.randomly delay first packet for 0~<number> ms,default value:0.
                                          do not use if you dont know what it means.
    -i,--interval         <number>        scatter each fec group to a interval of <number> ms,to protect burst packet loss.
                                          default value:0.do not use if you dont know what it means.
    --random-drop         <number>        simulate packet loss ,unit:0.01%. default value: 0
    --disable-obscure     <number>        disable obscure,to save a bit bandwidth and cpu
developer options:
    -j ,--jitter          jmin:jmax       similiar to -j above,but create jitter randomly between jmin and jmax
    -i,--interval         imin:imax       similiar to -i above,but scatter randomly between imin and imax
    -q,--queue-len        <number>        max fec queue len,only for mode 0
    --decode-buf          <number>        size of buffer of fec decoder,unit:packet,default:2000
    --fix-latency         <number>        try to stabilize latency,only for mode 0
    --delay-capacity      <number>        max number of delayed packets
    --disable-fec         <number>        completely disable fec,turn the program into a normal udp tunnel
    --sock-buf            <number>        buf size for socket,>=10 and <=10240,unit:kbyte,default:1024
log and help options:
    --log-level           <number>        0:never    1:fatal   2:error   3:warn 
                                          4:info (default)     5:debug   6:trace
    --log-position                        enable file name,function name,line number in log
    --disable-color                       disable log color
    -h,--help                             print this help message

Speed-Up any traffic with OpenVPN+UDPspeeder

Check UDPspeeder + openvpn config guide.