从网络接口获取标志

Question

Looking at the net/interface.go code it seems like the only way to get interface flags is as strings. Is this true?

if strings.Contains(i.Flags.String(), "broadcast") {

Feels gross.

Answer 1

net.Interface.Flags is a bitmask. To see if an interface has a certain flag, use the bitwise AND operator (&). For example:

if i.Flags&net.FlagBroadcast != 0 {
    // interface has broadcast
}