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geoip-check.go
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geoip-check.go
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package main
import (
"fmt"
"log"
"net"
"os"
"path/filepath"
"bufio"
"strings"
"github.com/oschwald/geoip2-golang"
)
func main() {
Banner := "geoip-check v1.2\n"
Banner = Banner + "Last Update: 14 Apr 2024, Alex Yang (linkedin.com/in/4yang)\n\n"
Banner = Banner + "Usage for Single IP query:\n"
Banner = Banner + " geoip-check [IPv4/v6] [Optional_Switch]\n\n"
Banner = Banner + "Optional_Switch for output format:\n"
Banner = Banner + " 0 Suppresss showing source IP\n"
Banner = Banner + " I Show only source IP, Country ISO Code\n"
Banner = Banner + " C Show only source IP, Country\n"
Banner = Banner + " c Show only source IP, City\n"
Banner = Banner + " T Show only source IP, Timezone\n"
Banner = Banner + " L Show only source IP, Latitude, Longitude\n"
Banner = Banner + " Cc Show only source IP, Country, City\n\n"
Banner = Banner + "Example:\n"
Banner = Banner + " geoip-check 74.125.200.100\n"
Banner = Banner + " geoip-check 2607:f8b0:4003:0c00:0000:0000:0000:006a\n"
Banner = Banner + " geoip-check 74.125.200.101 Cc\n"
Banner = Banner + " geoip-check 74.125.200.101 0C\n\n"
Banner = Banner + "Usage for Bulk IP query:\n"
Banner = Banner + " geoip-check [inputfile.txt] --> file extension must be .txt\n\n"
Banner = Banner + "Example:\n"
Banner = Banner + " geoip-check input.txt\n"
Banner = Banner + " geoip-check input.txt 0Cc\n\n"
var inputIP string
var isFile bool = false
var Switch string = "NIL"
defer func() {
if r := recover(); r != nil {
fmt.Println("Can't process further. Seems a bug!")
}
}()
if len(os.Args) == 1 {
fmt.Println(Banner)
return
}
if len(os.Args) == 2 { inputIP = os.Args[1] }
if len(os.Args) == 3 {
inputIP = os.Args[1]
Switch = os.Args[2]
}
if !strings.Contains(inputIP, ".") && !strings.Contains(inputIP, ":") {
fmt.Println(Banner)
return
}
if strings.Count(inputIP, ".") != 3 && strings.Count(inputIP, ":") < 4 {
if !strings.HasSuffix(inputIP, ".txt") {
fmt.Println(Banner)
return
} else {
isFile = true
}
}
homeDir, err := os.UserHomeDir()
if err != nil {
log.Fatal(err)
}
filePath := filepath.Join(homeDir, "GeoLite2-City.mmdb")
db, err := geoip2.Open(filePath)
if err != nil {
log.Fatal(err)
}
defer db.Close()
errline := 1
if isFile {
file, err := os.Open(inputIP)
if err != nil {
fmt.Println("failed opening file: %s", err)
return
}
scanner := bufio.NewScanner(file)
scanner.Split(bufio.ScanLines)
for scanner.Scan() {
txtlines := scanner.Text()
if len(txtlines) == 0 { continue }
if strings.Count(txtlines, ".") != 3 && strings.Count(txtlines, ":") < 4 {
fmt.Println("Error: line [", errline, "] IP: [", txtlines, "] - check if the format is correct")
errline++
continue
}
ip := net.ParseIP(txtlines)
record, err := db.City(ip)
if err != nil {
fmt.Println("Error: line [", errline, "] IP: [", txtlines, "] - check if the format is correct")
errline++
continue
}
switch Switch {
case "0":
fmt.Printf("%v,", record.Country.IsoCode)
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v,", record.City.Names["en"])
fmt.Printf("%v,", record.Location.TimeZone)
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
case "I":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v\n", record.Country.IsoCode)
case "C":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v\n", record.Country.Names["en"])
case "c":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v\n", record.City.Names["en"])
case "T":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v\n", record.Location.TimeZone)
case "L":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
case "Cc":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v\n", record.City.Names["en"])
case "0C":
fmt.Printf("%v\n", record.Country.Names["en"])
case "0I":
fmt.Printf("%v\n", record.Country.IsoCode)
case "0c":
fmt.Printf("%v\n", record.City.Names["en"])
case "0T":
fmt.Printf("%v\n", record.Location.TimeZone)
case "0L":
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
case "0Cc":
fmt.Printf("%v,", record.Country.IsoCode)
fmt.Printf("%v\n", record.City.Names["en"])
case "NIL":
fmt.Printf("%v,", txtlines)
fmt.Printf("%v,", record.Country.IsoCode)
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v,", record.City.Names["en"])
fmt.Printf("%v,", record.Location.TimeZone)
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
default:
fmt.Println("Unrecognized switch!")
}
errline++
}
file.Close()
} else {
ip := net.ParseIP(inputIP)
record, err := db.City(ip)
if err != nil {
log.Fatal(err)
}
switch Switch {
case "0":
fmt.Printf("%v,", record.Country.IsoCode)
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v,", record.City.Names["en"])
fmt.Printf("%v,", record.Location.TimeZone)
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
case "I":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v\n", record.Country.IsoCode)
case "C":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v\n", record.Country.Names["en"])
case "c":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v\n", record.City.Names["en"])
case "T":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v\n", record.Location.TimeZone)
case "L":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
case "Cc":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v\n", record.City.Names["en"])
case "0C":
fmt.Printf("%v\n", record.Country.Names["en"])
case "0I":
fmt.Printf("%v\n", record.Country.IsoCode)
case "0c":
fmt.Printf("%v\n", record.City.Names["en"])
case "0T":
fmt.Printf("%v\n", record.Location.TimeZone)
case "0L":
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
case "0Cc":
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v\n", record.City.Names["en"])
case "NIL":
fmt.Printf("%v,", inputIP)
fmt.Printf("%v,", record.Country.IsoCode)
fmt.Printf("%v,", record.Country.Names["en"])
fmt.Printf("%v,", record.City.Names["en"])
fmt.Printf("%v,", record.Location.TimeZone)
fmt.Printf("%v,", record.Location.Latitude)
fmt.Printf("%v\n", record.Location.Longitude)
default:
fmt.Println("Unrecognized switch!")
}
}
}
func IsIpv4Net(host string) bool {
return net.ParseIP(host) != nil
}
func IsIpv6Net(host string) bool {
return net.ParseIP(host) != nil
}