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Add command line option: -b, -bind-ip. With this option, you can bind…
… one or more IP addresses to the ran web server.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| package global | ||
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| import ( | ||
| "net" | ||
| "strings" | ||
| "fmt" | ||
| ) | ||
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| // Get network interface index by it's IP. | ||
| // Usage example: getInterfaceIndexByIP(net.ParseIP("fe80::aaaa:bbbb:cccc:dddd")) | ||
| func getInterfaceIndexByIP(addr net.IP) (index int, e error) { | ||
| if addr == nil { | ||
| e = fmt.Errorf("IP address is not correct") | ||
| return | ||
| } | ||
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| iface, err := net.Interfaces() | ||
| if e != nil { | ||
| e = err | ||
| return | ||
| } | ||
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| for _, i := range iface { | ||
| addrs, err := i.Addrs() | ||
| if err != nil { | ||
| e = err | ||
| return | ||
| } | ||
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| for _, a := range addrs { | ||
| address := net.ParseIP(strings.SplitN(a.String(), "/", 2)[0]) | ||
| if addr.Equal(address) { | ||
| index = i.Index | ||
| return | ||
| } | ||
| } | ||
| } | ||
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| e = fmt.Errorf("Could not found interface by this IP address: '%s'", addr.String()) | ||
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| return | ||
| } | ||
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| // check if an address is IPv6 link local address (fe80::/10) | ||
| func isIPv6LinkLocalAddress(addr net.IP) bool { | ||
| if addr.To4() != nil { | ||
| return false | ||
| } | ||
| return addr.IsLinkLocalUnicast() | ||
| } | ||
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| // get all IPs from command-line option -bind-ip | ||
| func getIPs(bindIP string) (ips []string, err error) { | ||
| anyIP := []string{"0.0.0.0"} | ||
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| if bindIP == "" { | ||
| ips = anyIP | ||
| return | ||
| } | ||
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| var invalidIPs []string | ||
| allIPs := make(map[string]interface{}) | ||
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| for _, item := range strings.Split(bindIP, ",") { | ||
| item = strings.TrimSpace(item) | ||
| if item == "" { | ||
| continue | ||
| } | ||
| add := net.ParseIP(item) | ||
| if add != nil { | ||
| if add.To4() != nil { | ||
| // IPv4 address | ||
| allIPs[add.String()] = nil | ||
| } else { | ||
| // IPv6 address | ||
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| if isIPv6LinkLocalAddress(add) { | ||
| // if the address is an IPv6 link local address (fe80::/10), | ||
| // add a scope (interface index) to the end of the address. | ||
| index, e := getInterfaceIndexByIP(add) | ||
| if e != nil { | ||
| err = e | ||
| return | ||
| } | ||
| allIPs[fmt.Sprintf("[%s%%%d]", add.String(), index)] = nil | ||
| } else { | ||
| allIPs[fmt.Sprintf("[%s]", add.String())] = nil | ||
| } | ||
| } | ||
| } else { | ||
| invalidIPs = append(invalidIPs, item) | ||
| } | ||
| } | ||
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| if len(invalidIPs) > 0 { | ||
| err = fmt.Errorf("Invalid IP: %s", strings.Join(invalidIPs, ", ")) | ||
| return | ||
| } | ||
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| if _, ok := allIPs["0.0.0.0"]; ok { | ||
| ips = anyIP | ||
| return | ||
| } | ||
| if _, ok := allIPs["[::]"]; ok { | ||
| ips = anyIP | ||
| return | ||
| } | ||
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| for key, _ := range allIPs { | ||
| ips = append(ips, key) | ||
| } | ||
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| if len(ips) == 0 { | ||
| err = fmt.Errorf("No IP address provided") | ||
| return | ||
| } | ||
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| return | ||
| } | ||
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