Network congestion simulator for TCP connections.
user@host:~$ npx netjam --help
netjam - Network (TCP) traffic jam simulator.
SYNTAX: npx netjam <remoteHost> <remotePort> [listenPort]
Where:
<remoteHost> Network name or IP of remote host.
<remotePort> Destination port number
[ListenPort] Sourece port number to forward (default = 5000Create a jamable TCP tunnel to local PostgreSQL Server listening in its default port (5432):
user@host:~$ npx netjam localhost 5432
Server listening on port 5000
STATUS:
┌─────────────┬────────────────────────────┐
│ (index) │ Values │
├─────────────┼────────────────────────────┤
│ remoteHost │ 'localhost' │
│ remotePort │ '5432' │
│ listenPort │ 5000 │
│ timestamp │ '2024-08-06T18:52:11.042Z' │
│ waiting │ 0 │
│ open │ 0 │
│ closed │ 0 │
│ withError │ 0 │
│ tx │ 0 │
│ rx │ 0 │
│ iputDelay │ 0 │
│ outputDelay │ 0 │
│ logInterval │ '0 (Disabled)' │
└─────────────┴────────────────────────────┘
AVAILABLE COMMANDS:
inputDelay - Sets input delay to specified value
outputDelay - Sets output delay to specified value
delay - Sets overall balanced delay to specified value
logInterval - Show/Set status (stderr) logging interval in msecs
quit - Quit the program
>📌 Now, every time you hit the
Enterkey, you will get an updated Status Report and a list of available commands.Additionally, if you set logInterval to a non zero value, it will start periodically logging status data in JSON format to stderr. You can use below command instead of the previous one to keep it apart to a file:
user@host:~$ npx netjam localhost 5432 2> netjam_log.json
Now you can open another terminal and connect to your local Postgres database throug port 5000:
user@host:~$ psql -h localhost -p 5000
Contraseña para usuario user:
user@constructor:~/112/mnt (master)$ LANG=C psql -h localhost -p 5000
Password for user user:
psql (15.7 (Ubuntu 15.7-1.pgdg22.04+1))
SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, compression: off)
Type "help" for help.
user=>This is a fully working conection with almost no penalty.
Now, at netjam console, you can, for instance, set a 1 second delay for every round-trip (tx+rx) connection:
> delay 1000
STATUS:
┌─────────────┬────────────────────────────┐
│ (index) │ Values │
├─────────────┼────────────────────────────┤
│ remoteHost │ 'localhost' │
│ remotePort │ '5432' │
│ listenPort │ 5000 │
│ timestamp │ '2024-08-06T19:02:33.886Z' │
│ waiting │ 0 │
│ open │ 3 │
│ closed │ 3 │
│ withError │ 0 │
│ tx │ 20 │
│ rx │ 21 │
│ iputDelay │ 0 │
│ outputDelay │ 500 │
│ inputDelay │ 500 │
│ logInterval │ '0 (Disabled)' │
└─────────────┴────────────────────────────┘
AVAILABLE COMMANDS:
inputDelay - Sets input delay to specified value
outputDelay - Sets output delay to specified value
delay - Sets overall balanced delay to specified value
logInterval - Show/Set status (stderr) logging interval in msecs
quit - Quit the program
>
Now your PostgreSQL connection still works, but a little bit slower... 😉
If you are interested in contributing with this project, you can do it in many ways:
-
Creating and/or mantainig documentation.
-
Implementing new features or improving code implementation.
-
Reporting bugs and/or fixing it.
-
Sending me any other feedback.
-
Whatever you like...
Please, contact-me, open issues or send pull-requests thought this project GIT repository
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent