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Working on portmaster restructure

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Daniel 2018-12-07 21:28:45 +01:00
parent 8fb21fd900
commit 8c11a35590
24 changed files with 850 additions and 554 deletions
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78
network/netutils/ip.go
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@ -4,95 +4,101 @@ package netutils
import "net"
// IP types
// IP classifications
const (
hostLocal int8 = iota
linkLocal
siteLocal
global
localMulticast
globalMulticast
invalid
HostLocal int8 = iota
LinkLocal
SiteLocal
Global
LocalMulticast
GlobalMulticast
Invalid
)
func classifyAddress(ip net.IP) int8 {
// ClassifyAddress returns the classification for the given IP address.
func ClassifyAddress(ip net.IP) int8 {
if ip4 := ip.To4(); ip4 != nil {
// IPv4
switch {
case ip4[0] == 127:
// 127.0.0.0/8
return hostLocal
return HostLocal
case ip4[0] == 169 && ip4[1] == 254:
// 169.254.0.0/16
return linkLocal
return LinkLocal
case ip4[0] == 10:
// 10.0.0.0/8
return siteLocal
return SiteLocal
case ip4[0] == 172 && ip4[1]&0xf0 == 16:
// 172.16.0.0/12
return siteLocal
return SiteLocal
case ip4[0] == 192 && ip4[1] == 168:
// 192.168.0.0/16
return siteLocal
return SiteLocal
case ip4[0] == 224:
// 224.0.0.0/8
return localMulticast
return LocalMulticast
case ip4[0] >= 225 && ip4[0] <= 239:
// 225.0.0.0/8 - 239.0.0.0/8
return globalMulticast
return GlobalMulticast
case ip4[0] >= 240:
// 240.0.0.0/8 - 255.0.0.0/8
return invalid
return Invalid
default:
return global
return Global
}
} else if len(ip) == net.IPv6len {
// IPv6
switch {
case ip.Equal(net.IPv6loopback):
return hostLocal
return HostLocal
case ip[0]&0xfe == 0xfc:
// fc00::/7
return siteLocal
return SiteLocal
case ip[0] == 0xfe && ip[1]&0xc0 == 0x80:
// fe80::/10
return linkLocal
return LinkLocal
case ip[0] == 0xff && ip[1] <= 0x05:
// ff00::/16 - ff05::/16
return localMulticast
return LocalMulticast
case ip[0] == 0xff:
// other ff00::/8
return globalMulticast
return GlobalMulticast
default:
return global
return Global
}
}
return invalid
return Invalid
}
// IPIsLocal returns true if the given IP is a site-local or link-local address
func IPIsLocal(ip net.IP) bool {
switch classifyAddress(ip) {
case siteLocal:
// IPIsLocalhost returns whether the IP refers to the host itself.
func IPIsLocalhost(ip net.IP) bool {
return ClassifyAddress(ip) == HostLocal
}
// IPIsLAN returns true if the given IP is a site-local or link-local address.
func IPIsLAN(ip net.IP) bool {
switch ClassifyAddress(ip) {
case SiteLocal:
return true
case linkLocal:
case LinkLocal:
return true
default:
return false
}
}
// IPIsGlobal returns true if the given IP is a global address
// IPIsGlobal returns true if the given IP is a global address.
func IPIsGlobal(ip net.IP) bool {
return classifyAddress(ip) == global
return ClassifyAddress(ip) == Global
}
// IPIsLinkLocal returns true if the given IP is a link-local address
// IPIsLinkLocal returns true if the given IP is a link-local address.
func IPIsLinkLocal(ip net.IP) bool {
return classifyAddress(ip) == linkLocal
return ClassifyAddress(ip) == LinkLocal
}
// IPIsSiteLocal returns true if the given IP is a site-local address
// IPIsSiteLocal returns true if the given IP is a site-local address.
func IPIsSiteLocal(ip net.IP) bool {
return classifyAddress(ip) == siteLocal
return ClassifyAddress(ip) == SiteLocal
}