Resolving local IP addresses

This recipe explains how to retrieve IP addresses from available local interfaces.

How to do it...

1. Open the console and create the folder chapter07/recipe01.
2. Navigate to the directory.
3. Create the interfaces.go file with the following content:

        package main

        import (
          "fmt"
          "net"
        )

        func main() {

          // Get all network interfaces
          interfaces, err := net.Interfaces()
          if err != nil {
            panic(err)
          }

          for _, interf := range interfaces {
            // Resolve addresses
            // for each interface
            addrs, err := interf.Addrs()
            if err != nil {
              panic(err)
            }
            fmt.Println(interf.Name)
            for _, add := range addrs {
              if ip, ok := add.(*net.IPNet); ok {
                fmt.Printf("\t%v\n", ip)
              }
            }

          }
        }

4. Execute the code by running go run interfaces...