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ip.go
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ip.go
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package gNet
import (
"net/netip"
)
// IsInBlocks IP是否包含在地址快中
func IsInBlocks(ip string, blocks []string) (isInBlocks bool, err error) {
// 解析ip
addr, err := netip.ParseAddr(ip)
if err != nil {
return false, err
}
// ip是否包含在块中
for _, blk := range blocks {
prefix, err := netip.ParsePrefix(blk)
if err != nil {
return false, err
}
if prefix.Contains(addr) {
return true, nil
}
}
return false, nil
}
// IsLoopback IP是否为回环地址
func IsLoopback(ip string) (isLoopback bool, err error) {
var blocks = []string{
// Loopback
"127.0.0.0/8",
"::1/128",
}
return IsInBlocks(ip, blocks)
}
// IsPrivate IP是否为专用地址
func IsPrivate(ip string) (isPrivate bool, err error) {
var blocks = []string{
// Private network
"10.0.0.0/8",
"172.16.0.0/12",
"192.168.0.0/16",
"fc00::/7",
"fd00::/8",
}
return IsInBlocks(ip, blocks)
}
// IsLinkLocal IP是否为链路本地地址
func IsLinkLocal(ip string) (isLinkLocal bool, err error) {
var blocks = []string{
// Link-local address
"169.254.0.0/16",
"fe80::/10",
}
return IsInBlocks(ip, blocks)
}
// IsPublic IP是否为公网地址
func IsPublic(ip string) (isPublic bool, err error) {
isLoopback, err := IsLoopback(ip)
if err != nil {
return false, err
}
if isLoopback {
return false, nil
}
isPrivate, err := IsPrivate(ip)
if err != nil {
return false, err
}
if isPrivate {
return false, nil
}
isLinkLocal, err := IsLinkLocal(ip)
if err != nil {
return false, err
}
if isLinkLocal {
return false, nil
}
return true, nil
}