Awesome

RI: A simple routing information client/server

RI is a UDP client/server to get Public and Private IP and Port for routing infromation exchange.

It could get your IPv4 and IPv6 information during client/server communication. It also support get the IPv4 Network Mask.

It could get public IP and Port, if your server host in a public IP. It will be prepare stage for next step of firewall Hole Punching.

Install

Install package go get github.com/kkdai/ri

Install server: go get github.com/kkdai/riserver

Install client: go get github.com/kkdai/riclient

Usage

Server side example

Init a local UDP server on port "10001".

package main

import . "github.com/kkdai/ri"

func main() {
	ser := NewServer()
	ser.ListenAndServe(":10001")
}

//2016/01/14 17:35:57 UDP Server strating listen: :10001
//2016/01/14 17:35:58 Cmd: RoutingInformation
//2016/01/14 17:35:58 DecodeRoutingInfo: RoutingInformation test/1234,172.16.110.103,fe80::211:6bff:fe67:1abf,60916,255.255.255.0
//2016/01/14 17:35:58 Got: 5 => test/1234 172.16.110.103 fe80::211:6bff:fe67:1abf 255.255.255.0 60916
//2016/01/14 17:35:58 ip: 127.0.0.1
//2016/01/14 17:35:58 port: 60916
//2016/01/14 17:35:58 RoutingInfo work: &{test/1234 127.0.0.1 60916 172.16.110.103 fe80::211:6bff:fe67:1abf 60916 255.255.255.0}  is it use NAT? false

Client side example

Send UDP socket to server "127.0.0.1:10001"

package main

import (
	"flag"

	. "github.com/kkdai/ri"
)

func main() {
	c := NewClient()
	c.Id = "test/1234"
	c.ConnectTo("127.0.0.1:10001")
	c.SendRoutingInfo()
}

//2016/01/14 17:35:58 ip: 127.0.0.1
//2016/01/14 17:35:58 port: 60916
//2016/01/14 17:35:58 netmask= 255.255.255.0  OS= darwin
//2016/01/14 17:35:58 Find ipv4 mapping: 172.16.110.103 255.255.255.0 en5
//2016/01/14 17:35:58 write-> RoutingInformation test/1234,172.16.110.103,fe80::211:6bff:fe67:1abf,60916,255.255.255.0
//2016/01/14 17:35:59 write-> RoutingInformation test/1234,172.16.110.103,fe80::211:6bff:fe67:1abf,60916,255.255.255.0
//2016/01/14 17:36:00 write-> RoutingInformation test/1234,172.16.110.103,fe80::211:6bff:fe67:1abf,60916,255.255.255.0

###Use the binary directly

• Init server with port "10001"
  • riserver ":10001"
• Send to server on "192.168.1.1" port "10001"
  • riclient "192.168.1.1:10001"

Inspired

• GoDoc: net

Project52

It is one of my project 52.

License

This package is licensed under MIT license. See LICENSE for details.