README

STATUS: This project is maintained. I will respond to issues, pull requests, and feature requests within a few days.

README

go library for the I2P SAMv3.0 bridge, used to build anonymous/pseudonymous end-to-end encrypted sockets.

This library is much better than ccondom (that use BOB), much more stable and much easier to maintain.

Support/TODO

What works:

• Utils
  • Resolving domain names to I2P destinations
  • .b32.i2p hashes
  • Generating keys/i2p destinations
• Streaming
  • DialI2P() - Connecting to stuff in I2P
  • Listen()/Accept() - Handling incomming connections
  • Implements net.Conn and net.Listener
• Datagrams
  • Implements net.PacketConn
• Raw datagrams
  • Like datagrams, but without addresses

Does not work:

• Stream Forwarding
• Probably needs some real-world testing

Documentation

• Latest version-documentation:
  • set your GOPATH
  • Enter godoc -http=:8081 into your terminal and hit enter.
  • Goto http://localhost:8081, click packages, and navigate to sam3

Examples

package main

import (
	"github.com/go-i2p/sam3"
	"github.com/go-i2p/sam3/i2pkeys"
	"fmt"
)

const yoursam = "127.0.0.1:7656" // sam bridge

func client(server i2pkeys.I2PAddr) {
	sam, _ := sam3.NewSAM(yoursam)
	keys, _ := sam.NewKeys()
	stream, _ := sam.NewStreamSession("clientTun", keys, sam3.Options_Small)
	fmt.Println("Client: Connecting to " + server.Base32())
	conn, _ := stream.DialI2P(server)
	conn.Write([]byte("Hello world!"))
	return
}

func main() {
	sam, _ := NewSAM(yoursam)
	keys, _ := sam.NewKeys()
	stream, _ := sam.NewStreamSession("serverTun", keys, sam3.Options_Medium)
	listener, _ := stream.Listen()
	go client(keys.Addr())
	conn, _ := listener.Accept()
	buf := make([]byte, 4096)
	n, _ := conn.Read(buf)
	fmt.Println("Server received: " + string(buf[:n]))
}

The above will write to the terminal:

Client: Connecting to zjnvfh4hs3et5vtz35ogwzrws26zvwkcad5uo5esecvg4qpk5b4a.b32.i2p
Server received: Hello world!

Error handling was omitted in the above code for readability.

Testing

• go test -tags=nettest runs the whole suite (takes 90+ sec to perform!)
• go test -short runs the shorter variant, does not connect to anything

Verbosity

Logging can be enabled and configured using the DEBUG_I2P environment variable. By default, logging is disabled.

There are three available log levels:

• Debug

export DEBUG_I2P=debug

• Warn

export DEBUG_I2P=warn

• Error

export DEBUG_I2P=error

If DEBUG_I2P is set to an unrecognized variable, it will fall back to "debug".

License

Public domain.

Author

• Kalle Vedin kalle.vedin@fripost.org
• Unknown Name (majestrate)
• idk
• qiwenmin