feat: 增加SNMP扫描 增加UDP端口扫描

Plugins/SNMP.go

@@ -0,0 +1,90 @@
+package Plugins
+
+import (
+	"fmt"
+	"github.com/gosnmp/gosnmp"
+	"github.com/shadow1ng/fscan/Common"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// SNMPScan 执行SNMP服务扫描
+// SNMPScan 执行SNMP服务扫描
+func SNMPScan(info *Common.HostInfo) (tmperr error) {
+	if Common.DisableBrute {
+		return
+	}
+
+	starttime := time.Now().Unix()
+	portNum, _ := strconv.Atoi(info.Ports) // 添加端口转换
+
+	// 首先尝试默认community strings
+	defaultCommunities := []string{"public", "private", "cisco", "community"}
+
+	for _, community := range defaultCommunities {
+		flag, err := SNMPConnect(info, community, portNum) // 传入转换后的端口
+		if flag && err == nil {
+			return err
+		}
+
+		if Common.CheckErrs(err) {
+			return err
+		}
+
+		errlog := fmt.Sprintf("[-] SNMP服务 %v:%v 尝试失败 community: %v 错误: %v",
+			info.Host, info.Ports, community, err)
+		Common.LogError(errlog)
+		tmperr = err
+
+		// 修正超时计算
+		timeout := time.Duration(Common.Timeout) * time.Second
+		if time.Now().Unix()-starttime > int64(timeout.Seconds())*int64(len(defaultCommunities)) {
+			return err
+		}
+	}
+
+	return tmperr
+}
+
+// SNMPConnect 尝试SNMP连接
+func SNMPConnect(info *Common.HostInfo, community string, portNum int) (bool, error) {
+	host := info.Host
+	timeout := time.Duration(Common.Timeout) * time.Second
+
+	snmp := &gosnmp.GoSNMP{
+		Target:    host,
+		Port:      uint16(portNum),
+		Community: community,
+		Version:   gosnmp.Version2c,
+		Timeout:   timeout,
+		Retries:   1,
+	}
+
+	err := snmp.Connect()
+	if err != nil {
+		return false, err
+	}
+	defer snmp.Conn.Close()
+
+	oids := []string{"1.3.6.1.2.1.1.1.0"}
+	result, err := snmp.Get(oids)
+	if err != nil {
+		return false, err
+	}
+
+	if len(result.Variables) > 0 {
+		success := fmt.Sprintf("[+] SNMP服务 %v:%v community: %v",
+			host, portNum, community) // 使用portNum替换port
+
+		if result.Variables[0].Type != gosnmp.NoSuchObject {
+			sysDesc := strings.TrimSpace(string(result.Variables[0].Value.([]byte)))
+			success += fmt.Sprintf(" System: %v", sysDesc)
+		}
+
+		Common.LogSuccess(success)
+		return true, nil
+	}
+
+	return false, fmt.Errorf("认证失败")
+}