“os”
“fmt”
“net”
“runtime”
“github.com/vishvananda/netns”
“os/exec”
)

func main() {
 // Lock the OS Thread so we don’t accidentally switch namespaces
 runtime.LockOSThread()
 defer runtime.UnlockOSThread()

// Save the current network namespace
 origns, _ := netns.Get()
 defer origns.Close()

// Get the network namespace based on container id
 newns, _ := netns.GetFromDocker(“a115e93f5137”)
 defer newns.Close()
 netns.Set(newns)

// Do something with the network namespace
 ifaces, _ := net.Interfaces()
 fmt.Printf(“Interfaces: %v\n”, ifaces)
 cmd := exec.Command(“tshark”,”-z”,”conv,ip”,”-i”,”eth0")
 cmd.Stdout = os.Stdout
 cmd.Stderr = os.Stderr
 cmd.Stdin = os.Stdin
 cmd.Run()

 //Return to original namespace
`netns.Set(origns)
}

This program must be run as root since it changes the network namespace. Instead of using wireshark, i used the command line version tshark, and run it in the conversation mode. This can be changed according to the needs.