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
+4.6k PHP : Hide PHP version information from curl
+23.2k Golang : Generate MD5 checksum of a file
+16.6k Golang : Iterate linked list example
+8.5k Mac OSX : Get a process/daemon status information
+5.9k Get Facebook friends working in same company
+21.5k Golang : Convert Unix timestamp to UTC timestamp
+4.9k Golang : ROT32768 (rotate by 0x80) UTF-8 strings example
+12.3k Golang : How to get a user home directory path?
+11.3k Golang : convert(cast) string to integer value
+19.6k Golang : Saving private and public key to files
+11k Golang : Clean formatting/indenting or pretty print JSON result
+29.9k Golang : How to convert(cast) string to IP address?