A simple library for discovering the IP address of the default gateway.

Example:

package main

import (
    "fmt"

    "github.com/jackpal/gateway"
)

func main() {
    gateway, err := gateway.DiscoverGateway()
    if err != nil {
        fmt.Println(err)
    } else {
        fmt.Println("Gateway:", gateway.String())
   }
}

Provides implementations for:

• Darwin (macOS)
• Dragonfly
• FreeBSD
• Linux
• NetBSD
• OpenBSD
• Solaris
• Windows

Other platforms use an implementation that always returns an error.

Pull requests for other OSs happily considered!

• Fix non-BSD-based builds.

• Add go.mod and go.sum files.
• Use "golang.org/x/net/route" to implement all BSD variants.
  • As a side effect this adds support for Dragonfly and NetBSD.
• Add example to README.
• Remove broken continuous integration.

• Add support for OpenBSD
• Linux parser now supports gateways with an IP address of 0.0.0.0
• Fall back to netstat on darwin systems if route fails.
• Simplify Linux /proc/net/route parsers.