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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,137 @@ | ||
| package command | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "os" | ||
| "os/signal" | ||
| "runtime" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| "github.com/v-byte-cpu/sx/pkg/scan" | ||
| "github.com/v-byte-cpu/sx/pkg/scan/arp" | ||
| "github.com/v-byte-cpu/sx/pkg/scan/icmp" | ||
| ) | ||
|
|
||
| var ( | ||
| cliICMPTypeFlag string | ||
| cliICMPCodeFlag string | ||
| cliICMPPayloadFlag string | ||
|
|
||
| cliICMPType uint8 | ||
| cliICMPCode uint8 | ||
| cliICMPPayload []byte | ||
| ) | ||
|
|
||
| func init() { | ||
| icmpCmd.Flags().StringVar(&cliIPTTLFlag, "ttl", "", | ||
| strings.Join([]string{"set IP TTL field of generated packet", "64 by default"}, "\n")) | ||
| icmpCmd.Flags().StringVar(&cliIPTotalLenFlag, "iplen", "", | ||
| strings.Join([]string{"set IP Total Length field of generated packet", "calculated by default"}, "\n")) | ||
| icmpCmd.Flags().StringVar(&cliIPProtocolFlag, "ipproto", "", | ||
| strings.Join([]string{"set IP Protocol field of generated packet", "1 (ICMP) by default"}, "\n")) | ||
| icmpCmd.Flags().StringVar(&cliIPFlagsFlag, "ipflags", "", | ||
| strings.Join([]string{"set IP Flags field of generated packet", "DF by default"}, "\n")) | ||
|
|
||
| icmpCmd.Flags().StringVarP(&cliICMPTypeFlag, "type", "t", "", | ||
| strings.Join([]string{"set ICMP type of generated packet", "ICMP Echo (Type 8) by default"}, "\n")) | ||
| icmpCmd.Flags().StringVarP(&cliICMPCodeFlag, "code", "c", "", | ||
| strings.Join([]string{"set ICMP code of generated packet", "0 by default"}, "\n")) | ||
| icmpCmd.Flags().StringVarP(&cliICMPPayloadFlag, "payload", "p", "", | ||
| strings.Join([]string{"set byte payload of generated packet", "48 random bytes by default"}, "\n")) | ||
|
|
||
| icmpCmd.Flags().StringVarP(&cliARPCacheFileFlag, "arp-cache", "a", "", | ||
| strings.Join([]string{"set ARP cache file", "reads from stdin by default"}, "\n")) | ||
| rootCmd.AddCommand(icmpCmd) | ||
| } | ||
|
|
||
| var icmpCmd = &cobra.Command{ | ||
| Use: "icmp [flags] subnet", | ||
| Example: strings.Join([]string{ | ||
| "icmp 192.168.0.1/24", | ||
| "icmp --ttl 37 192.168.0.1/24", | ||
| "icmp --ipproto 157 192.168.0.1/24", | ||
| `icmp --type 13 --code 0 --payload '\x01\x02\x03' 10.0.0.1`}, "\n"), | ||
| Short: "Perform ICMP scan", | ||
| PreRunE: func(cmd *cobra.Command, args []string) (err error) { | ||
| if len(args) != 1 { | ||
| return errors.New("requires one ip subnet argument") | ||
| } | ||
| var icmpType uint64 | ||
| if len(cliICMPTypeFlag) > 0 { | ||
| if icmpType, err = strconv.ParseUint(cliICMPTypeFlag, 10, 8); err != nil { | ||
| return | ||
| } | ||
| cliICMPType = uint8(icmpType) | ||
| } | ||
| var icmpCode uint64 | ||
| if len(cliICMPCodeFlag) > 0 { | ||
| if icmpCode, err = strconv.ParseUint(cliICMPCodeFlag, 10, 8); err != nil { | ||
| return | ||
| } | ||
| cliICMPCode = uint8(icmpCode) | ||
| } | ||
| if len(cliICMPPayloadFlag) > 0 { | ||
| if cliICMPPayload, err = parsePacketPayload(cliICMPPayloadFlag); err != nil { | ||
| return | ||
| } | ||
| } | ||
| return | ||
| }, | ||
| RunE: func(cmd *cobra.Command, args []string) (err error) { | ||
| ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt) | ||
| defer cancel() | ||
|
|
||
| var conf *scanConfig | ||
| if conf, err = parseScanConfig(icmp.ScanType, args[0]); err != nil { | ||
| return | ||
| } | ||
|
|
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| m := newICMPScanMethod(ctx, conf) | ||
|
|
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| return startPacketScanEngine(ctx, newPacketScanConfig( | ||
| withPacketScanMethod(m), | ||
| withPacketBPFFilter(icmp.BPFFilter), | ||
| withPacketEngineConfig(newEngineConfig( | ||
| withLogger(conf.logger), | ||
| withScanRange(conf.scanRange), | ||
| )), | ||
| )) | ||
| }, | ||
| } | ||
|
|
||
| func newICMPScanMethod(ctx context.Context, conf *scanConfig) *icmp.ScanMethod { | ||
| reqgen := arp.NewCacheRequestGenerator( | ||
| scan.NewIPRequestGenerator(scan.NewIPGenerator()), conf.gatewayIP, conf.cache) | ||
| pktgen := scan.NewPacketMultiGenerator(icmp.NewPacketFiller(getICMPOptions()...), runtime.NumCPU()) | ||
| psrc := scan.NewPacketSource(reqgen, pktgen) | ||
| results := scan.NewResultChan(ctx, 1000) | ||
| return icmp.NewScanMethod(psrc, results) | ||
| } | ||
|
|
||
| func getICMPOptions() (opts []icmp.PacketFillerOption) { | ||
| if len(cliIPTTLFlag) > 0 { | ||
| opts = append(opts, icmp.WithTTL(cliTTL)) | ||
| } | ||
| if len(cliIPTotalLenFlag) > 0 { | ||
| opts = append(opts, icmp.WithIPTotalLength(cliIPTotalLen)) | ||
| } | ||
| if len(cliIPProtocolFlag) > 0 { | ||
| opts = append(opts, icmp.WithIPProtocol(cliIPProtocol)) | ||
| } | ||
| if len(cliIPFlagsFlag) > 0 { | ||
| opts = append(opts, icmp.WithIPFlags(cliIPFlags)) | ||
| } | ||
| if len(cliICMPTypeFlag) > 0 { | ||
| opts = append(opts, icmp.WithType(cliICMPType)) | ||
| } | ||
| if len(cliICMPCodeFlag) > 0 { | ||
| opts = append(opts, icmp.WithCode(cliICMPCode)) | ||
| } | ||
| if len(cliICMPPayloadFlag) > 0 { | ||
| opts = append(opts, icmp.WithPayload(cliICMPPayload)) | ||
| } | ||
| return | ||
| } |
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