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package main
import (
"io/ioutil"
"log"
"net"
"os"
"strings"
"time"
)
const (
WHOIS_SERVER = /*"whois-servers.net"*/ "whois.cymru.com" /*"asn.shadowserver.org"*/
WHOIS_PORT = "43"
TIMEOUT = 120
RETRIES = 3
)
var (
wlogger *log.Logger
)
func init() {
wlogger = log.New(os.Stdout, "[ Whois ]", log.LstdFlags)
}
/*
func main() {
pairs, err := findIPBlock("130.229.137.105", "192.88.99.1")
if err != nil {
panic(err)
}
log.Println(pairs)
}
*/
func findIPBlock(domains ...string) (pairs map[string]string, err error) {
if VERBOSE {
wlogger.Println("Querying for ip-blocks...")
}
if len(domains) == 0 {
return
}
var res string
if len(domains) == 1 {
res, err = whois(domains[0])
if err != nil {
return
}
} else {
res, err = whoisBulk(domains)
if err != nil {
return
}
}
lines := strings.Split(res, "\n")
pairs = make(map[string]string, len(lines)-2)
for _, line := range lines[1 : len(lines)-1] {
content := strings.Split(line, "|")
ipaddr := strings.TrimSpace(content[1])
ipb := strings.TrimSpace(content[2])
pairs[ipaddr] = ipb
}
if VERBOSE {
wlogger.Println("ip-blocks returned")
}
return
}
func whois(domain string) (answer string, err error) {
var conn net.Conn
for i := 0; i < RETRIES; i++ {
conn, err = net.DialTimeout("tcp", net.JoinHostPort("whois.cymru.com", WHOIS_PORT), time.Second*TIMEOUT)
if err != nil {
return
}
}
defer conn.Close()
//conn.Write([]byte(" -p " + domain + "\r\n"))
conn.Write([]byte(" -p -o -u " + domain + "\r\n"))
buff, err := ioutil.ReadAll(conn)
if err != nil {
return
}
answer = string(buff[:])
return
}
func whoisBulk(domains []string) (answer string, err error) {
var conn net.Conn
for i := 0; i < RETRIES; i++ {
conn, err = net.DialTimeout("tcp", net.JoinHostPort("whois.cymru.com", WHOIS_PORT), time.Second*TIMEOUT)
if err != nil {
return
}
}
defer conn.Close()
//conn.Write([]byte(" -p " + domain + "\r\n"))
conn.Write([]byte(" -p -o -u begin\r\n"))
for _, d := range domains {
conn.Write([]byte(d + "\r\n"))
}
conn.Write([]byte("end\r\n"))
buff, err := ioutil.ReadAll(conn)
if err != nil {
return
}
answer = string(buff[:])
return
}
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