sendfiles

Copyright (C) 2017-2024 David Capello

This project is released under the terms of the MIT license. Read LICENSE.txt for more information.

A program to send/receive files between two personal computers.

Usage

We run the sendfiles in computer A to receive files:

sendfiles

And in other computer B we specify the files to transfer:

sendfiles file1.zip file2.zip

This will send file1.zip and file2.zip files from B to A. The IP of A is located automatically by B with a scan of IP addresses in the local network and the TCP port 8095.

Usage

sendfiles [-ip ADDRESS] [-p PORT] [-k PASSWORD] [file1 [file2...]]

• -ip ADDRESS connects to the given IP address of the receiver (scan IPs automatically otherwise)
• -p PORT TCP port to use for the connection (8095 by default)
• -k PASSWORD uses a password/key to match computers that use/known the same password. This key is not used to encrypt data (yet).

Warning: Plain data/key

All information will be transferred in plain data over the network between computers. There is zero encryption.

Protocol

The client scans IP addresses in the local network, and tries to connect to each one through the TCP port 8095. When it is connected, it sends one line:

key STRING\n

If the key is accepted, the server/receiver will respond with:

ok\n

and the client can start sending files. In other case the server will respond:

invalid key\n

and the connection will be terminated.

When the key is accepted, the client sends files following this protocol:

file FILENAME size INT64 sha1 STRING\n
BYTES[size]\n
file FILENAME size INT64 sha1 STRING\n
BYTES[size]\n
...
done\n