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README.md

go-nat-pmp

A Go language client for the NAT-PMP internet protocol for port mapping and discovering the external IP address of a firewall.

NAT-PMP is supported by Apple brand routers and open source routers like Tomato and DD-WRT.

See https://tools.ietf.org/rfc/rfc6886.txt

Build Status

Get the package

# Get the go-nat-pmp package.
go get -u github.com/jackpal/go-nat-pmp

Usage

Get one more package, used by the example code:

go get -u github.com/jackpal/gateway

Create a directory:

cd ~/go
mkdir -p src/hello
cd src/hello

Create a file hello.go with these contents:

package main

import (
    "fmt"

    "github.com/jackpal/gateway"
    natpmp "github.com/jackpal/go-nat-pmp"
)

func main() {
    gatewayIP, err := gateway.DiscoverGateway()
    if err != nil {
        return
    }

    client := natpmp.NewClient(gatewayIP)
    response, err := client.GetExternalAddress()
    if err != nil {
        return
    }
    fmt.Printf("External IP address: %v\n", response.ExternalIPAddress)
}

Build the example

go build
./hello

External IP address: [www xxx yyy zzz]

Clients

This library is used in the Taipei Torrent BitTorrent client http://github.com/jackpal/Taipei-Torrent

Complete documentation

http://godoc.org/github.com/jackpal/go-nat-pmp

License

This project is licensed under the Apache License 2.0.

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A Go language client for the NAT-PMP internet protocol for port mapping and discovering the external IP address of a firewall.

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