Golang : How to detect a server/machine network interface capabilities?
Problem :
You want to know which network interfaces on a server that support Broadcast, Loopback, PointToPoint or Multicast networking capabilities. How to do that in Golang?
Solution :
Use the net.Interfaces()
function to retrieve all the available network interfaces on the server, then check each interfaces' Flags.
For example :
package main
import (
"fmt"
"net"
"strings"
)
func main() {
interfaces, err := net.Interfaces()
if err != nil {
fmt.Print(err)
return
}
for _, i := range interfaces {
fmt.Printf("Name : %v \n", i.Name)
// see http://golang.org/pkg/net/#Flags
fmt.Println("Interface type and supports : ", i.Flags.String())
if strings.Contains(i.Flags.String(), "up") {
fmt.Println("Status : UP")
} else {
fmt.Println("Status : DOWN")
}
if strings.Contains(i.Flags.String(), "multicast") {
fmt.Println("Support multicast : YES")
} else {
fmt.Println("Support multicast : NO")
}
}
}
Sample output :
Name : lo0
Interface type and supports : up|loopback|multicast
Status : UP
Support multicast : YES
Name : gif0
Interface type and supports : pointtopoint|multicast
Status : DOWN
Support multicast : YES
Name : stf0
Interface type and supports : 0
Status : DOWN
Support multicast : NO
Name : en1
Interface type and supports : up|broadcast|multicast
Status : UP
Support multicast : YES
References :
http://golang.org/pkg/net/#Interfaces
http://golang.org/pkg/net/#Flags
const (
FlagUp Flags = 1 << iota // interface is up
FlagBroadcast // interface supports broadcast access capability
FlagLoopback // interface is a loopback interface
FlagPointToPoint // interface belongs to a point-to-point link
FlagMulticast // interface supports multicast access capability
)
https://www.socketloop.com/references/golang-net-flags-type-and-flags-string-function-example
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+8.6k Golang : HTTP Routing with Goji example
+7.3k Golang : Handling Yes No Quit query input
+11.5k Golang : Verify Linux user password again before executing a program example
+10.4k Golang : Flip coin example
+11.4k Golang : Gorilla web tool kit secure cookie example
+4.7k Golang : Calculate a pip value and distance to target profit example
+4.9k Golang : Convert lines of string into list for delete and insert operation
+5.5k Swift : Get substring with rangeOfString() function example
+23.3k Golang : Check if element exist in map
+5.1k Unix/Linux/MacOSx : How to remove an environment variable ?
+6.9k Golang : Get environment variable
+14.4k Golang : Get URI segments by number and assign as variable example