Don't try to bind on address from inactive interface

This commit is contained in:
William Tisäter 2015-09-02 12:24:36 +02:00
parent 4267814e5b
commit 1013f2f494
1 changed files with 27 additions and 1 deletions

View File

@ -175,10 +175,36 @@ func isPrivateIP(ip_str string) bool {
return false return false
} }
// Returns addresses from interfaces that is up
func activeInterfaceAddresses() ([]net.Addr, error) {
var upAddrs []net.Addr
interfaces, err := net.Interfaces()
if err != nil {
return nil, fmt.Errorf("Failed to get interfaces: %v", err)
}
for _, iface := range interfaces {
// Require interface to be up
if iface.Flags&net.FlagUp == 0 {
continue
}
addresses, err := iface.Addrs()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
upAddrs = append(upAddrs, addresses...)
}
return upAddrs, nil
}
// GetPrivateIP is used to return the first private IP address // GetPrivateIP is used to return the first private IP address
// associated with an interface on the machine // associated with an interface on the machine
func GetPrivateIP() (net.IP, error) { func GetPrivateIP() (net.IP, error) {
addresses, err := net.InterfaceAddrs() addresses, err := activeInterfaceAddresses()
if err != nil { if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err) return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
} }