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netutil: minor doc and style tweaks 

Change-Id: I9c5706d62dc7c56785c95a444cc2bb3da1d8e571
This commit is contained in:
Brad Fitzpatrick 2014-11-23 07:43:09 -08:00
parent 32bdf89105
commit 76405b796c
1 changed files with 7 additions and 13 deletions
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20
pkg/netutil/netutil.go
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@ -69,17 +69,14 @@ func HostPort(urlStr string) (string, error) {
return hostPort, nil
}
// ListenOnLocalRandomPort returns a tcp listener on a local (see LoopbackIP) random port.
// ListenOnLocalRandomPort returns a TCP listener on a random
// localhost port.
func ListenOnLocalRandomPort() (net.Listener, error) {
ip, err := Localhost()
if err != nil {
return nil, err
}
l, err := net.ListenTCP("tcp", &net.TCPAddr{IP: ip, Port: 0})
if err != nil {
return nil, err
}
return l, nil
return net.ListenTCP("tcp", &net.TCPAddr{IP: ip, Port: 0})
}
// Localhost returns the first address found when
@ -103,20 +100,17 @@ func localhostLookup() net.IP {
return nil
}
const flagUpLoopback = net.FlagUp | net.FlagLoopback
// loopbackIP finds the first loopback IP address sniffing network interfaces.
// loopbackIP returns the first loopback IP address sniffing network
// interfaces or nil if none is found.
func loopbackIP() net.IP {
interfaces, err := net.Interfaces()
if err != nil {
return nil
}
for _, inf := range interfaces {
const flagUpLoopback = net.FlagUp | net.FlagLoopback
if inf.Flags&flagUpLoopback == flagUpLoopback {
addrs, err := inf.Addrs()
if err != nil {
continue
}
addrs, _ := inf.Addrs()
for _, addr := range addrs {
ip, _, err := net.ParseCIDR(addr.String())
if err == nil && ip.IsLoopback() {