Implementations of an echo server

This repo contains multiple implementations of an echo-servers using differents languages/frameworks.

Implementations

Dir	Contents	Language	Platform	Technologies
c_winsock_iocp_thread	Winsock 2 implementation using I/O Completion Ports, Overlapped sockets and worker threads	C	Windows	Winsock 2, IOCP
c_winsock_wsapoll	Winsock 2 implementation using WSAPoll and single thread	C	Windows	Winsock 2, WSAPoll

WIP:

Dir	Contents	Language	Platform	Technologies
c_linux_epoll	Linux epoll implementation	C	Linux	epoll
c_bsd_kqueue	BSD kqueue implementation	C	BSD	kqueue
c_libuv	Libuv implementation	C	Multi	libuv
Java NIO	Java 21 using NIO single threaded	Java	Multi	Java NIO
Java Netty	Java 21 using Netty	Java	Multi	Java, Netty
Java NIO MT	Java 21 using NIO and virtual threads	Java	Multi	Java NIO, VT
Python		Python	Multi	Python
C++ Boost.Asio	C++ using Boost.Asio	C++	Multi	C++, Boost.Asio

Testing

test_echo_server.py is a simple utility to test echo servers. Run with Python >= 3.8.

Note

Script will attempt to use poll() mechanism to manage client connections. If not poll() available (i.e Windows) it will to use select() method.

Description of utility:

usage: test_echo_server [-h] [-l LENGTH] [-i INTERVAL_RANGE] [-n NUM] [-p THREADS] [-c CONNECTIONS] host port

Tests echo servers sending generated variable data.

positional arguments:
  host                  host or ip of the  server to test
  port                  port

options:
  -h, --help            show this help message and exit
  -l LENGTH, --length LENGTH
                        length of string to send.
  -i INTERVAL_RANGE, --interval_range INTERVAL_RANGE
                        interval range (format: [min-]<max>), in miliseconds, between each send of a string. This includes connections too. Script selects a random number between min and max
  -n NUM, --num NUM     Num messages to send
  -p THREADS, --threads THREADS
                        Num. of threads
  -c CONNECTIONS, --connections CONNECTIONS
                        Connections by thread.

Table format is:

Send timestamp,finish send timestamp,timestamp of receiving response data,response time,length of data sent,length of data received,thread id,client_id,error flag (0 if no error)

The error is marked when sent data and received data are not equals. Last column set to 1 if error occurs.

Timestamp values are Unix Time in miliseconds. Time values are in miliseconds.