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maxmind
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8 changed files with 394 additions and 431 deletions
176
iputils.go
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176
iputils.go
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package main
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import (
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"fmt"
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"log"
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"net"
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"net/http"
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"regexp"
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"strings"
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)
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var bogonNets = []*net.IPNet{
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// IPv4
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{IP: net.IPv4(0, 0, 0, 0), Mask: net.CIDRMask(8, 32)}, // "This" network
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{IP: net.IPv4(10, 0, 0, 0), Mask: net.CIDRMask(8, 32)}, // Private-use networks
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{IP: net.IPv4(100, 64, 0, 0), Mask: net.CIDRMask(10, 32)}, // Carrier-grade NAT
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{IP: net.IPv4(127, 0, 0, 0), Mask: net.CIDRMask(8, 32)}, // Loopback
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{IP: net.IPv4(127, 0, 53, 53), Mask: net.CIDRMask(32, 32)}, // Name collision occurrence
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{IP: net.IPv4(169, 254, 0, 0), Mask: net.CIDRMask(16, 32)}, // Link-local
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{IP: net.IPv4(172, 16, 0, 0), Mask: net.CIDRMask(12, 32)}, // Private-use networks
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{IP: net.IPv4(192, 0, 0, 0), Mask: net.CIDRMask(24, 32)}, // IETF protocol assignments
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{IP: net.IPv4(192, 0, 2, 0), Mask: net.CIDRMask(24, 32)}, // TEST-NET-1
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{IP: net.IPv4(192, 168, 0, 0), Mask: net.CIDRMask(16, 32)}, // Private-use networks
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{IP: net.IPv4(198, 18, 0, 0), Mask: net.CIDRMask(15, 32)}, // Network interconnect device benchmark testing
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{IP: net.IPv4(198, 51, 100, 0), Mask: net.CIDRMask(24, 32)}, // TEST-NET-2
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{IP: net.IPv4(203, 0, 113, 0), Mask: net.CIDRMask(24, 32)}, // TEST-NET-3
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{IP: net.IPv4(224, 0, 0, 0), Mask: net.CIDRMask(4, 32)}, // Multicast
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{IP: net.IPv4(240, 0, 0, 0), Mask: net.CIDRMask(4, 32)}, // Reserved for future use
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{IP: net.IPv4(255, 255, 255, 255), Mask: net.CIDRMask(32, 32)}, // Limited broadcast
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// IPv6
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{IP: net.ParseIP("::/128"), Mask: net.CIDRMask(128, 128)}, // Node-scope unicast unspecified address
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{IP: net.ParseIP("::1/128"), Mask: net.CIDRMask(128, 128)}, // Node-scope unicast loopback address
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{IP: net.ParseIP("::ffff:0:0/96"), Mask: net.CIDRMask(96, 128)}, // IPv4-mapped addresses
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{IP: net.ParseIP("::/96"), Mask: net.CIDRMask(96, 128)}, // IPv4-compatible addresses
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{IP: net.ParseIP("100::/64"), Mask: net.CIDRMask(64, 128)}, // Remotely triggered black hole addresses
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{IP: net.ParseIP("2001:10::/28"), Mask: net.CIDRMask(28, 128)}, // Overlay routable cryptographic hash identifiers (ORCHID)
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{IP: net.ParseIP("2001:db8::/32"), Mask: net.CIDRMask(32, 128)}, // Documentation prefix
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{IP: net.ParseIP("fc00::/7"), Mask: net.CIDRMask(7, 128)}, // Unique local addresses (ULA)
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{IP: net.ParseIP("fe80::/10"), Mask: net.CIDRMask(10, 128)}, // Link-local unicast
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{IP: net.ParseIP("fec0::/10"), Mask: net.CIDRMask(10, 128)}, // Site-local unicast (deprecated)
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{IP: net.ParseIP("ff00::/8"), Mask: net.CIDRMask(8, 128)}, // Multicast
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// Additional Bogon Ranges
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{IP: net.ParseIP("2002::/24"), Mask: net.CIDRMask(24, 128)}, // 6to4 bogon (0.0.0.0/8)
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{IP: net.ParseIP("2002:a00::/24"), Mask: net.CIDRMask(24, 128)}, // 6to4 bogon (10.0.0.0/8)
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{IP: net.ParseIP("2002:7f00::/24"), Mask: net.CIDRMask(24, 128)}, // 6to4 bogon (127.0.0.0/8)
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{IP: net.ParseIP("2002:a9fe::/32"), Mask: net.CIDRMask(32, 128)}, // 6to4 bogon (169.254.0.0/16)
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{IP: net.ParseIP("2002:ac10::/28"), Mask: net.CIDRMask(28, 128)}, // 6to4 bogon (172.16.0.0/12)
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{IP: net.ParseIP("2002:c000::/40"), Mask: net.CIDRMask(40, 128)}, // 6to4 bogon (192.0.0.0/24)
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{IP: net.ParseIP("2002:c000:200::/40"), Mask: net.CIDRMask(40, 128)}, // 6to4 bogon (192.0.2.0/24)
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{IP: net.ParseIP("2002:c0a8::/32"), Mask: net.CIDRMask(32, 128)}, // 6to4 bogon (192.168.0.0/16)
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{IP: net.ParseIP("2002:c612::/31"), Mask: net.CIDRMask(31, 128)}, // 6to4 bogon (198.18.0.0/15)
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{IP: net.ParseIP("2002:c633:6400::/40"), Mask: net.CIDRMask(40, 128)}, // 6to4 bogon (198.51.100.0/24)
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{IP: net.ParseIP("2002:cb00:7100::/40"), Mask: net.CIDRMask(40, 128)}, // 6to4 bogon (203.0.113.0/24)
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{IP: net.ParseIP("2002:e000::/20"), Mask: net.CIDRMask(20, 128)}, // 6to4 bogon (224.0.0.0/4)
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{IP: net.ParseIP("2002:f000::/20"), Mask: net.CIDRMask(20, 128)}, // 6to4 bogon (240.0.0.0/4)
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{IP: net.ParseIP("2002:ffff:ffff::/48"), Mask: net.CIDRMask(48, 128)}, // 6to4 bogon (255.255.255.255/32)
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{IP: net.ParseIP("2001::/40"), Mask: net.CIDRMask(40, 128)}, // Teredo bogon (0.0.0.0/8)
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{IP: net.ParseIP("2001:0:a00::/40"), Mask: net.CIDRMask(40, 128)}, // Teredo bogon (10.0.0.0/8)
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{IP: net.ParseIP("2001:0:7f00::/40"), Mask: net.CIDRMask(40, 128)}, // Teredo bogon (127.0.0.0/8)
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{IP: net.ParseIP("2001:0:a9fe::/48"), Mask: net.CIDRMask(48, 128)}, // Teredo bogon (169.254.0.0/16)
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{IP: net.ParseIP("2001:0:ac10::/44"), Mask: net.CIDRMask(44, 128)}, // Teredo bogon (172.16.0.0/12)
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{IP: net.ParseIP("2001:0:c000::/56"), Mask: net.CIDRMask(56, 128)}, // Teredo bogon (192.0.0.0/24)
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{IP: net.ParseIP("2001:0:c000:200::/56"), Mask: net.CIDRMask(56, 128)}, // Teredo bogon (192.0.2.0/24)
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{IP: net.ParseIP("2001:0:c0a8::/48"), Mask: net.CIDRMask(48, 128)}, // Teredo bogon (192.168.0.0/16)
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{IP: net.ParseIP("2001:0:c612::/47"), Mask: net.CIDRMask(47, 128)}, // Teredo bogon (198.18.0.0/15)
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{IP: net.ParseIP("2001:0:c633:6400::/56"), Mask: net.CIDRMask(56, 128)}, // Teredo bogon (198.51.100.0/24)
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{IP: net.ParseIP("2001:0:cb00:7100::/56"), Mask: net.CIDRMask(56, 128)}, // Teredo bogon (203.0.113.0/24)
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{IP: net.ParseIP("2001:0:e000::/36"), Mask: net.CIDRMask(36, 128)}, // Teredo bogon (224.0.0.0/4)
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{IP: net.ParseIP("2001:0:f000::/36"), Mask: net.CIDRMask(36, 128)}, // Teredo bogon (240.0.0.0/4)
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{IP: net.ParseIP("2001:0:ffff:ffff::/64"), Mask: net.CIDRMask(64, 128)}, // Teredo bogon (255.255.255.255/32)
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}
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// Check if the IP is a bogon IP
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func isBogon(ip net.IP) bool {
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for _, net := range bogonNets {
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if net.Contains(ip) {
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return true
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}
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}
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return false
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}
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// Get the real IP address from the request headers
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func getRealIP(r *http.Request) string {
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if realIP := r.Header.Get("CF-Connecting-IP"); realIP != "" {
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return realIP
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} else if realIP := r.Header.Get("X-Forwarded-For"); realIP != "" {
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return strings.Split(realIP, ",")[0]
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} else {
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return extractIP(r.RemoteAddr)
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}
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}
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// Lookup IP data in the databases
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func lookupIPData(ip net.IP) *dataStruct {
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dbMtx.RLock()
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defer dbMtx.RUnlock()
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var cityRecord struct {
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City struct {
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Names map[string]string `maxminddb:"names"`
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} `maxminddb:"city"`
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Subdivisions []struct {
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Names map[string]string `maxminddb:"names"`
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} `maxminddb:"subdivisions"`
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Country struct {
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IsoCode string `maxminddb:"iso_code"`
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Names map[string]string `maxminddb:"names"`
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} `maxminddb:"country"`
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Continent struct {
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Code string `maxminddb:"code"`
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Names map[string]string `maxminddb:"names"`
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} `maxminddb:"continent"`
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Location struct {
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Latitude float64 `maxminddb:"latitude"`
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Longitude float64 `maxminddb:"longitude"`
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} `maxminddb:"location"`
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}
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err := cityDB.Lookup(ip, &cityRecord)
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if err != nil {
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log.Printf("Error looking up city data: %v\n", err)
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return nil
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}
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var asnRecord struct {
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AutonomousSystemNumber uint `maxminddb:"autonomous_system_number"`
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AutonomousSystemOrganization string `maxminddb:"autonomous_system_organization"`
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}
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err = asnDB.Lookup(ip, &asnRecord)
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if err != nil {
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log.Printf("Error looking up ASN data: %v\n", err)
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return nil
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}
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hostname, err := net.LookupAddr(ip.String())
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if err != nil || len(hostname) == 0 {
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hostname = []string{""}
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}
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var sd *string
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if len(cityRecord.Subdivisions) > 0 {
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name := cityRecord.Subdivisions[0].Names["en"]
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sd = &name
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}
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return &dataStruct{
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IP: toPtr(ip.String()),
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Hostname: toPtr(strings.TrimSuffix(hostname[0], ".")),
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ASN: toPtr(fmt.Sprintf("%d", asnRecord.AutonomousSystemNumber)),
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Org: toPtr(asnRecord.AutonomousSystemOrganization),
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City: toPtr(cityRecord.City.Names["en"]),
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Region: sd,
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Country: toPtr(cityRecord.Country.Names["en"]),
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Continent: toPtr(cityRecord.Continent.Names["en"]),
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Loc: toPtr(fmt.Sprintf("%.4f,%.4f", cityRecord.Location.Latitude, cityRecord.Location.Longitude)),
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}
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}
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// Convert string to pointer
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func toPtr(s string) *string {
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if s == "" {
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return nil
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}
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return &s
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}
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// Validate JSONP callback name
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var callbackJSONP = regexp.MustCompile(`^[a-zA-Z_\$][a-zA-Z0-9_\$]*$`)
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// Extract the IP address from a string, removing unwanted characters
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func extractIP(ip string) string {
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ip = strings.ReplaceAll(ip, "[", "")
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ip = strings.ReplaceAll(ip, "]", "")
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ss := strings.Split(ip, ":")
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return strings.Join(ss[:len(ss)-1], ":")
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}
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