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115 lines
5.8 KiB
Markdown
115 lines
5.8 KiB
Markdown
# UDPspeeder
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Network Speed-Up Tool. Boost your Connection on a High Lantency High Packet-Loss Link by using Forward Error Correction.
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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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or
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[简体中文](/doc/README.md)
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# Efficacy
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tested on a link with 100ms latency and 10% packet loss at both direction
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### Ping Packet Loss
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### SCP Copy Speed
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# Supported Platforms
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Linux host (including desktop Linux,Android phone/tablet,OpenWRT router,or Raspberry PI).
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For Windows and MacOS You can run UDPspeeder inside [this](https://github.com/wangyu-/udp2raw-tunnel/releases/download/20170918.0/lede-17.01.2-x86_virtual_machine_image_with_udp2raw_pre_installed.zip) 7.5mb virtual machine image.
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# How does it work
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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.
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### Reed-Solomon
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`
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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.
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`
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`
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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.
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`
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Check wikipedia for more info, https://en.wikipedia.org/wiki/Reed–Solomon_error_correction
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# Getting Started
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### Installing
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Download binary release from https://github.com/wangyu-/UDPspeeder/releases
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### Running (speed-up UDP only)
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Assume your server ip is 44.55.66.77, you have a service listening on udp port 7777.
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```bash
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# Run at server side:
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./speederv2 -s -l0.0.0.0:4096 -r 127.0.0.1:7777 -f20:10
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# Run at client side
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./speederv2 -c -l0.0.0.0:3333 -r44.55.66.77:4096 -f20:10
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```
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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.
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##### Note
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`-f20:10` means sending 10 redundant packets for every 20 original packets.
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# Advanced Topic
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### Full Options
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```
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UDPspeeder V2
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git version:f479ca2779 build date:Oct 19 2017 01:37:08
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repository: https://github.com/wangyu-/UDPspeeder
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usage:
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run as client : ./this_program -c -l local_listen_ip:local_port -r server_ip:server_port [options]
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run as server : ./this_program -s -l server_listen_ip:server_port -r remote_ip:remote_port [options]
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common option,must be same on both sides:
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-k,--key <string> key for simple xor encryption. if not set,xor is disabled
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main options:
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-f,--fec x:y forward error correction,send y redundant packets for every x packets
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--timeout <number> how long could a packet be held in queue before doing fec,unit: ms
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--mode <number> fec-mode,available values: 0,1 ; 0 cost less bandwidth,1 cost less latency
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--report <number> turn on send/recv report,and set a period for reporting,unit:s
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advanced options:
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--mtu <number> mtu. for mode 0,the program will split packet to segment smaller than mtu_value.
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for mode 1,no packet will be split,the program just check if the mtu is exceed.
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default value:1250
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-j,--jitter <number> simulated jitter.randomly delay first packet for 0~<number> ms,default value:0.
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do not use if you dont know what it means.
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-i,--interval <number> scatter each fec group to a interval of <number> ms,to protect burst packet loss.
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default value:0.do not use if you dont know what it means.
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--random-drop <number> simulate packet loss ,unit:0.01%. default value: 0
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--disable-obscure <number> disable obscure,to save a bit bandwidth and cpu
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developer options:
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-j ,--jitter jmin:jmax similiar to -j above,but create jitter randomly between jmin and jmax
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-i,--interval imin:imax similiar to -i above,but scatter randomly between imin and imax
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-q,--queue-len <number> max fec queue len,only for mode 0
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--decode-buf <number> size of buffer of fec decoder,unit:packet,default:2000
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--fix-latency <number> try to stabilize latency,only for mode 0
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--delay-capacity <number> max number of delayed packets
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--disable-fec <number> completely disable fec,turn the program into a normal udp tunnel
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--sock-buf <number> buf size for socket,>=10 and <=10240,unit:kbyte,default:1024
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log and help options:
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--log-level <number> 0:never 1:fatal 2:error 3:warn
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4:info (default) 5:debug 6:trace
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--log-position enable file name,function name,line number in log
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--disable-color disable log color
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-h,--help print this help message
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```
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### Speed-Up any traffic with OpenVPN+UDPspeeder
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Check [UDPspeeder + openvpn config guide](/doc/udpspeeder_openvpn.md).
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