liu-yt / lftp

A network application to support large file reliable transfer based on UDP

LFTP

Introduction

• Use UDP as the transport layer protocol
• Realize 100% reliability as TCP
• Implement flow control function similar as TCP
• Implement congestion control function similar as TCP
• Be able to support multiple clients as the same time

Usage

• Server

  g++ server.cpp main.cpp -o LFTP -lwsock32 -std=c++11    ## 编译
  LFTP.exe                                                ## 启动服务器

• Client

  g++ client.cpp main.cpp -o LFTP -lwsock32 -std=c++11    ## 编译
  LFTP.exe lget server file                               ## 使用legt
  LFTP.exe lsend server file                              ## 使用lsend

  • Demo

    lftp.exe lget 127.0.0.1:8888 server.txt
    lftp.exe lsend 127.0.0.1:8888 ../data/client.txt

Note

• Each client can only support one operation(lsend or lget) at a time.
• The default port used by the server is 8888, the port can be modified by the default port of the Server constructor
  • Server(string _dir = "../data/", int port = 8888)
• The default receive transfer file is stored in the ../data/ directory，both of the server and client
• When using lsend, you need to give the file path relative to src, use relative path only for /
• Please input the command parameters as required, otherwise unnecessary errors will occur

Design

• Design Document

Test

• Test Document