/
ipfilter.go
174 lines (171 loc) · 3.92 KB
/
ipfilter.go
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package ipgeo
import (
"net"
)
func cidrRangeContains(cidrRange string, checkIP string) bool {
_, ipNet, err := net.ParseCIDR(cidrRange)
if err != nil {
return false
}
secondIP := net.ParseIP(checkIP)
return ipNet.Contains(secondIP)
}
// Filter 被选到的返回 geodata, true 否则返回 nil, false
func Filter(ip string) (*IPGeoData, bool) {
//geodata := &IPGeoData{}
asn := ""
whois := ""
isFiltered := false
switch {
case cidrRangeContains("0.0.0.0/8", ip):
asn = ""
whois = "RFC1122"
isFiltered = true
//IANA Reserved Address Space
case cidrRangeContains("100.64.0.0/10", ip):
asn = ""
whois = "RFC6598"
isFiltered = true
//127.0.0.0/8
case cidrRangeContains("127.0.0.0/8", ip):
asn = ""
whois = "RFC1122"
isFiltered = true
//169.254.0.0/16
case cidrRangeContains("169.254.0.0/16", ip):
asn = ""
whois = "RFC3927"
isFiltered = true
//192.0.0.0/24
case cidrRangeContains("192.0.0.0/24", ip):
asn = ""
whois = "RFC6890"
isFiltered = true
//192.0.2.0/24
case cidrRangeContains("192.0.2.0/24", ip):
asn = ""
whois = "RFC5737"
isFiltered = true
//192.88.99.0/24
case cidrRangeContains("192.88.99.0/24", ip):
asn = ""
whois = "RFC3068"
isFiltered = true
case cidrRangeContains("198.18.0.0/15", ip):
asn = ""
whois = "RFC2544"
isFiltered = true
case cidrRangeContains("198.51.100.0/24", ip):
fallthrough
case cidrRangeContains("203.0.113.0/24", ip):
asn = ""
whois = "RFC5737"
isFiltered = true
//224.0.0.0/4
case cidrRangeContains("224.0.0.0/4", ip):
asn = ""
whois = "RFC5771"
isFiltered = true
//255.255.255.255/32
case cidrRangeContains("255.255.255.255/32", ip):
asn = ""
whois = "RFC0919"
isFiltered = true
case cidrRangeContains("240.0.0.0/4", ip):
asn = ""
whois = "RFC1112"
isFiltered = true
case cidrRangeContains("fe80::/10", ip):
asn = ""
whois = "RFC4291"
isFiltered = true
case cidrRangeContains("ff00::/8", ip):
asn = ""
whois = "RFC4291"
isFiltered = true
case cidrRangeContains("fec0::/10", ip):
asn = ""
whois = "RFC3879"
isFiltered = true
case cidrRangeContains("fe00::/9", ip):
asn = ""
whois = "RFC4291"
isFiltered = true
case cidrRangeContains("64:ff9b::/96", ip):
asn = ""
whois = "RFC6052"
isFiltered = true
case cidrRangeContains("0::/96", ip):
asn = ""
whois = "RFC4291"
isFiltered = true
case cidrRangeContains("64:ff9b:1::/48", ip):
asn = ""
whois = "RFC6052"
isFiltered = true
case cidrRangeContains("2001:db8::/32", ip):
asn = ""
whois = "RFC3849"
isFiltered = true
case cidrRangeContains("2002::/16", ip):
asn = ""
whois = "RFC3056"
isFiltered = true
case net.ParseIP(ip).IsPrivate():
//rfc4193
if cidrRangeContains("fc00::/7", ip) {
asn = ""
whois = "RFC4193"
isFiltered = true
//rfc1918
} else {
asn = ""
whois = "RFC1918"
isFiltered = true
}
//Defense Information System Network
case cidrRangeContains("6.0.0.0/8", ip):
fallthrough
case cidrRangeContains("7.0.0.0/8", ip):
fallthrough
case cidrRangeContains("11.0.0.0/8", ip):
fallthrough
case cidrRangeContains("21.0.0.0/8", ip):
fallthrough
case cidrRangeContains("22.0.0.0/8", ip):
fallthrough
case cidrRangeContains("26.0.0.0/8", ip):
fallthrough
case cidrRangeContains("28.0.0.0/8", ip):
fallthrough
case cidrRangeContains("29.0.0.0/8", ip):
fallthrough
case cidrRangeContains("30.0.0.0/8", ip):
fallthrough
case cidrRangeContains("33.0.0.0/8", ip):
fallthrough
case cidrRangeContains("55.0.0.0/8", ip):
fallthrough
case cidrRangeContains("214.0.0.0/8", ip):
fallthrough
case cidrRangeContains("215.0.0.0/8", ip):
asn = ""
whois = "DOD"
isFiltered = true
default:
}
// 判断是否为v6 且不在2000::/3
if net.ParseIP(ip).To4() == nil && !cidrRangeContains("2000::/3", ip) && !isFiltered {
asn = ""
whois = "INVALID"
isFiltered = true
}
if !isFiltered {
return nil, false
} else {
return &IPGeoData{
Asnumber: asn,
Whois: whois,
}, true
}
}