Usage

This page assumes you have already installed Opensend. If not, follow the installation instructions on the installation page.

Configuration#

Opensend allows configuration by TOML and by command line flags. It looks at the following paths for configs in the specified order:

Config files#

1. Config path from --config flag
2. ~/.config/opensend.toml
3. /etc/opensend.toml

Command line flags#

Usage of opensend:
  -d string
        Data to send
  -dest-dir string
        Destination directory for files or dirs sent over opensend (default "/home/arsen/Downloads")
  -r    Receive data
  -s    Send data
  -send-to string
        Use IP address of receiver instead of mDNS
  -skip-mdns
        Skip zeroconf service registration (use if mdns fails)
  -t string
        Type of data being sent

The purpose of the mdns-skipping flags is to account for the iSH app in iOS, as the mdns resolver and registration fails on it.

Algorithms and software used#

• RSA for asymmetric encryption
• AES for symmetric encryption
• Tar for archiving directories
• Zstandard for compression
• Base91 for encoding
• Gob for serialization
• JSON for serialization
• TCP sockets for transfer
• Zeroconf/mDNS for device discovery