Assume your local network to your server is lossy. Just establish a VPN connection to your server with UDPspeeder + any UDP-based VPN, access your server via this VPN connection, then your connection quality will be significantly improved. With well-tuned parameters , you can easily reduce IP or UDP/ICMP packet-loss-rate to less than 0.01% . Besides reducing packet-loss-rate, UDPspeeder can also significantly improve your TCP latency and TCP single-thread download speed.
For Windows and MacOS You can run UDPspeeder inside [this](https://github.com/wangyu-/udp2raw-tunnel/releases/download/20171108.0/lede-17.01.2-x86_virtual_machine_image.zip) 7.5mb virtual machine image.
UDPspeeder uses FEC(Forward Error Correction) to reduce packet loss rate, at the cost of addtional bandwidth. The algorithm for FEC is called 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.
Now connecting to UDP port 3333 at the client side is equivalent to connecting to port 7777 at the server side, and the connection has been boosted by UDPspeeder.
--disable-obscure <number> disable obscure, to save a bit bandwidth and cpu.
developer options:
--fifo <string> use a fifo(named pipe) for sending commands to the running program, so that you
can change fec encode parameters dynamically, check readme.md in repository for
supported commands.
-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
--decode-buf <number> size of buffer of fec decoder,u nit: 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
```
#### `--fifo` option
Use a fifo(named pipe) for sending commands to the running program. For example `--fifo fifo.file`, you can use following commands to change parameters dynamically:
