65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
package xnet
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import (
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"net"
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"strconv"
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)
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// Docker has common docker addresses (class B):
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// https://en.wikipedia.org/wiki/Private_network
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// - docker0 172.17.0.1/16
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// - br-xxxx 172.18.0.1/16
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// - hassio 172.30.32.1/23
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var Docker = net.IPNet{
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IP: []byte{172, 16, 0, 0},
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Mask: []byte{255, 240, 0, 0},
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}
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// ParseUnspecifiedPort will return port if address is unspecified
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// ex. ":8555" or "0.0.0.0:8555"
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func ParseUnspecifiedPort(address string) int {
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host, port, err := net.SplitHostPort(address)
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if err != nil {
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return 0
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}
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if host != "" && host != "0.0.0.0" && host != "[::]" {
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return 0
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}
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i, _ := strconv.Atoi(port)
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return i
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}
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func IPNets(ipFilter func(ip net.IP) bool) ([]*net.IPNet, error) {
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ifaces, err := net.Interfaces()
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if err != nil {
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return nil, err
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}
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var nets []*net.IPNet
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for _, iface := range ifaces {
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if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 {
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continue
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}
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addrs, _ := iface.Addrs() // range on nil slice is OK
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for _, addr := range addrs {
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switch v := addr.(type) {
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case *net.IPNet:
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ip := v.IP.To4()
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if ip == nil {
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continue
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}
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if ipFilter != nil && !ipFilter(ip) {
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continue
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}
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nets = append(nets, v)
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}
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}
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}
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return nets, nil
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}
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