cai/port_scanner.go

134 lines
3.1 KiB
Go

package main
import (
"fmt"
"net"
"sync"
"time"
"sort"
"strings"
)
// Mapeo básico de puertos a servicios comunes
var commonPorts = map[int]string{
20: "FTP-data", 21: "FTP", 22: "SSH", 23: "Telnet",
25: "SMTP", 53: "DNS", 80: "HTTP", 110: "POP3",
115: "SFTP", 135: "RPC", 139: "NetBIOS", 143: "IMAP",
194: "IRC", 443: "HTTPS", 445: "SMB", 989: "FTPS-data",
990: "FTPS", 1433: "MSSQL", 3306: "MySQL", 3389: "RDP",
5432: "PostgreSQL", 5900: "VNC", 6379: "Redis", 8080: "HTTP-Proxy",
8443: "HTTPS-Alt", 27017: "MongoDB",
}
// Estructura para almacenar resultados
type ScanResult struct {
Port int
State string
Service string
Banner string
}
func scanPort(ip string, port int, timeout time.Duration) ScanResult {
target := fmt.Sprintf("%s:%d", ip, port)
conn, err := net.DialTimeout("tcp", target, timeout)
result := ScanResult{Port: port}
if err != nil {
result.State = "closed"
return result
}
defer conn.Close()
result.State = "open"
// Intentar identificar el servicio
if service, exists := commonPorts[port]; exists {
result.Service = service
} else {
result.Service = "unknown"
}
// Intentar obtener un banner
if conn != nil {
_ = conn.SetReadDeadline(time.Now().Add(1 * time.Second))
banner := make([]byte, 1024)
_, err := conn.Read(banner)
if err == nil {
result.Banner = strings.TrimSpace(string(banner))
if len(result.Banner) > 100 {
result.Banner = result.Banner[:100] + "..."
}
}
}
return result
}
func main() {
ip := "192.168.1.1"
fmt.Printf("Iniciando escaneo de puertos en %s\n", ip)
fmt.Println("---------------------------------------")
// Lista de puertos a escanear
portsToScan := []int{}
// Agregar los puertos comunes
for port := range commonPorts {
portsToScan = append(portsToScan, port)
}
// Agregar algunos puertos adicionales comunes
additionalPorts := []int{8000, 8008, 8081, 8888, 9000, 9090}
portsToScan = append(portsToScan, additionalPorts...)
// Ordenar puertos para una salida más legible
sort.Ints(portsToScan)
// Configurar concurrencia
var wg sync.WaitGroup
var mutex sync.Mutex
results := make(map[int]ScanResult)
timeout := 500 * time.Millisecond
// Limitar la concurrencia para evitar problemas
semaphore := make(chan struct{}, 100)
for _, port := range portsToScan {
wg.Add(1)
semaphore <- struct{}{}
go func(p int) {
defer wg.Done()
defer func() { <-semaphore }()
result := scanPort(ip, p, timeout)
mutex.Lock()
results[p] = result
mutex.Unlock()
}(port)
}
wg.Wait()
// Mostrar resultados
fmt.Println("PUERTO\tESTADO\tSERVICIO\tBANNER")
fmt.Println("---------------------------------------")
openPorts := 0
for _, port := range portsToScan {
if result, exists := results[port]; exists && result.State == "open" {
banner := result.Banner
if banner != "" {
banner = ": " + banner
}
fmt.Printf("%d\t%s\t%s\t%s\n", result.Port, result.State, result.Service, banner)
openPorts++
}
}
fmt.Println("---------------------------------------")
fmt.Printf("Escaneo completado: %d puertos abiertos encontrados en %s\n", openPorts, ip)
}