60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package Tools
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import (
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"net"
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"strings"
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)
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// Provides all IP addresses for this server.
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func ReadAllIPAddresses4ThisHost() (addresses4Host []string) {
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addresses4Host = ipAddresses
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return
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}
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// Read all IP addreses once.
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func initIPAddresses4ThisHost() {
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// Get any IP addresses:
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addresses, err := net.InterfaceAddrs()
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if err != nil {
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// Case: Error! Use localhost.
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ipAddresses = make([]string, 1)
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ipAddresses[0] = `127.0.0.1`
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return
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}
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counter := 0
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ipAddresses = make([]string, len(addresses))
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// Loop over all addresses:
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for _, address := range addresses {
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addressText := address.String()
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// Case: CIDR notation?
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if strings.Contains(addressText, `/`) {
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// Convert the address:
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addressText = addressText[:strings.Index(addressText, `/`)]
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}
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// Parse the address to determine some meta data:
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ip := net.ParseIP(addressText)
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// Filter out any loopback and local entries:
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if !ip.IsLoopback() && !ip.IsUnspecified() && strings.ToLower(ip.String()) != `fe80::1` {
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ipAddresses[counter] = ip.String()
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counter++
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}
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}
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if counter == 0 {
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// Case: No public facing address found.
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// Use localhost instead.
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ipAddresses = make([]string, 1)
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ipAddresses[0] = `127.0.0.1`
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} else {
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ipAddresses = ipAddresses[:counter]
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}
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return
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}
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