< img src = "https://github.com/knaccc/i2p-zero/blob/master/i2p-zero.png" align = "left" width = "336" height = "124" >
# Zero dependency, small footprint, cross-platform I2P Java Router with SAM interface
This project will run under Linux, and build native launchers for Linux, MacOS and Windows. The launchers will include the I2P router, a SAM listener and a minimal JVM.
## Footprint
The zero-dependency distribution sizes are as follows:
OS | Uncompressed size (MB) | xz Compressed size (MB)
------------ | ------------- | -------------
Linux | 41.6 | 22.5
MacOS | 29.5 | 17.5
Windows | 33.6 | 20.1
## Building the launchers
From a freshly installed Ubuntu system, first ensure git is installed:
`sudo apt install git`
Then, retrieve this project from git:
`git clone https://github.com/knaccc/i2p-zero.git`
Note that the current version of this script uses jdk-11.0.2. If this version of Java becomes no longer available for
download, then update the references to jdk-11.0.2 in java-config.sh to the later version. To locate a recent
JDK download URL, see https://jdk.java.net/11/
Also note that JDKs for Linux, MacOS and Windows will be downloaded, which will total several hundred megabytes.
Run the `bin/build-all.sh` script, which will in turn call the following scripts:
1. `bin/import-packages.sh` to retrieve the I2P Java sources, OpenJDK and the Ant build tool
2. `bin/build-original-i2p.sh` to build the I2P project retrieved from the I2P repository
3. `build-launcher.sh` to convert the I2P JARs to modules, compile the Java source code in this project, and then use
the jlink tool to build zero-dependency platform-specific launchers.
## Running the launchers
To run the Linux router, type:
`dist/linux/router/bin/launch.sh`
To run the MacOS router, type:
`dist/mac/router/bin/launch.sh`
For Windows, run:
`dist/windows/router/bin/launch.bat`
If it launches successfully, you'll see the message:
```
I2P router launched. SAM listening on port 7656.
Press Ctrl-C to gracefully shut down the router (or send the SIGINT signal to the process).
```
## Check that the I2P router is running and that it is listening for SAM connections
`fuser 7656/tcp`
## Tunnel control
Listen for i2p connections and forward them to the specified host and port. Returns a newly created destination public key.
`dist/linux/router/bin/tunnel-control.sh server.create <host> <port>`
// Close the tunnel listening for connections on the specified port. Returns "OK".
`dist/linux/router/bin/tunnel-control.sh server.destroy <i2p destination public key>`
Create a tunnel that listens for connections on localhost and forwards connections over I2P to the specified destination public key. Returns a newly created localhost port number.
`dist/linux/router/bin/tunnel-control.sh client.create <i2p destination public key>`
Close the tunnel listening for connections on the specified port. Returns "OK".
`dist/linux/router/bin/tunnel-control.sh client.destroy <port>`
## Watch the I2P log for messages
`tail -f dist/linux/router/i2p.config/wrapper.log`
