Added mirros and updated LICENSE
This commit is contained in:
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GPG Key ID:
EF4B922DB85DC9DE
2
LICENSE
2
LICENSE
@ -1,6 +1,6 @@
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ISC License
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Copyright (c) 2023, acidvegas <acid.vegas@acid.vegas>
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Copyright (c) 2024, acidvegas <acid.vegas@acid.vegas>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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@ -8,6 +8,7 @@ This Packet Analysis Tool is designed to capture and analyze network packets in
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- Supports analysis of TCP, UDP, and ICMP protocols.
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- Displays packet details such as source/destination IP, source/destination port, packet length, and TTL.
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- Identifies and displays printable payloads in network traffic.
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- JSON packet logs for deep analysis.
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## Usage
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| Argument | Description |
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@ -16,3 +17,7 @@ This Packet Analysis Tool is designed to capture and analyze network packets in
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| `-c` | Set the packets-per-second threshold for logging. |
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| `-x` | Provide a comma-separated list of IPs and ports to exclude. |
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| `-i` | Provide a comma-separated list of IPs and ports to include. |
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___
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###### Mirrors for this repository: [acid.vegas](https://git.acid.vegas/ddosmonit) • [SuperNETs](https://git.supernets.org/acidvegas/ddosmonit) • [GitHub](https://github.com/acidvegas/ddosmonit) • [GitLab](https://gitlab.com/acidvegas/ddosmonit) • [Codeberg](https://codeberg.org/acidvegas/ddosmonit)
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@ -7,18 +7,22 @@ import (
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"fmt"
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"log"
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"net"
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"os"
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"regexp"
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"strconv"
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"strings"
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"time"
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"unicode"
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"github.com/google/gopacket"
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"github.com/google/gopacket/layers"
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"github.com/google/gopacket/pcap"
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)
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var (
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deviceMonitor = flag.String("d", "eth0", "Device to monitor")
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packetThreshold = flag.Int("c", 5000, "Packets per second threshold to start logging")
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excludeList = flag.String("x", "", "Comma-separated list of IPs and ports to exclude")
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includeList = flag.String("i", "", "Comma-separated list of IPs and ports to include")
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)
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const (
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ColorReset = "\033[0m"
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ColorDarkGrey = "\033[90m"
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@ -30,27 +34,20 @@ const (
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ColorPink = "\033[95m"
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)
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var (
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deviceMonitor = flag.String("d", "eth0", "Device to monitor")
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packetThreshold = flag.Int("c", 5000, "Packets per second threshold to start logging")
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excludeList = flag.String("x", "", "Comma-separated list of IPs and ports to exclude")
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includeList = flag.String("i", "", "Comma-separated list of IPs and ports to include")
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)
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type PacketInfo struct {
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Timestamp string `json:"timestamp"`
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Protocol string `json:"protocol"`
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SourceIP net.IP `json:"source_ip"`
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DestIP net.IP `json:"dest_ip"`
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SourcePort int `json:"source_port"`
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DestIP net.IP `json:"dest_ip"`
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DestPort int `json:"dest_port"`
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Length int `json:"length,omitempty"`
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TTL int `json:"ttl,omitempty"`
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WindowSize int `json:"window_size,omitempty"`
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TCPFlags string `json:"tcp_flags,omitempty"`
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Checksum int `json:"checksum,omitempty"`
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PayloadData string `json:"payload_data,omitempty"`
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TCPFlags string `json:"tcp_flags,omitempty"`
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ICMPData string `json:"icmp_data,omitempty"`
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PayloadData string `json:"payload_data,omitempty"`
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}
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func main() {
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@ -138,105 +135,6 @@ func main() {
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}
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}
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func getInterfaceMAC(interfaceName string) (net.HardwareAddr, error) {
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iface, err := net.InterfaceByName(interfaceName)
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if err != nil {
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return nil, err
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}
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return iface.HardwareAddr, nil
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}
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func parseAndValidateIPsAndPorts(list string) ([]net.IP, []int) {
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var ips []net.IP
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var ports []int
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items := strings.Split(list, ",")
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for _, item := range items {
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item = strings.TrimSpace(item)
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if ip := net.ParseIP(item); ip != nil {
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ips = append(ips, ip)
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} else if port, err := strconv.Atoi(item); err == nil {
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ports = append(ports, port)
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}
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}
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return ips, ports
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}
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func shouldProcessPacket(packet gopacket.Packet, excludeIPs []net.IP, excludePorts []int, includeIPs []net.IP, includePorts []int) bool {
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ipv4Layer := packet.Layer(layers.LayerTypeIPv4)
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tcpLayer := packet.Layer(layers.LayerTypeTCP)
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udpLayer := packet.Layer(layers.LayerTypeUDP)
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var srcIP, dstIP net.IP
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var srcPort, dstPort int
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if ipv4Layer != nil {
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ipv4, _ := ipv4Layer.(*layers.IPv4)
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srcIP = ipv4.SrcIP
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dstIP = ipv4.DstIP
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}
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if tcpLayer != nil {
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tcp, _ := tcpLayer.(*layers.TCP)
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srcPort = int(tcp.SrcPort)
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dstPort = int(tcp.DstPort)
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} else if udpLayer != nil {
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udp, _ := udpLayer.(*layers.UDP)
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srcPort = int(udp.SrcPort)
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dstPort = int(udp.DstPort)
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}
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if containsIP(excludeIPs, srcIP) || containsIP(excludeIPs, dstIP) || containsPort(excludePorts, srcPort) || containsPort(excludePorts, dstPort) {
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return false
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}
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if len(includeIPs) > 0 || len(includePorts) > 0 {
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return containsIP(includeIPs, srcIP) || containsIP(includeIPs, dstIP) || containsPort(includePorts, srcPort) || containsPort(includePorts, dstPort)
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}
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return true
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}
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func containsIP(ips []net.IP, ip net.IP) bool {
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for _, listedIP := range ips {
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if ip.Equal(listedIP) {
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return true
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}
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}
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return false
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}
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func containsPort(ports []int, port int) bool {
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for _, listedPort := range ports {
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if port == listedPort {
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return true
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}
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}
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return false
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}
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func isLikelyPlainText(data []byte) bool {
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if len(data) == 0 {
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return false
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}
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var printableCount, controlCount int
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for _, runeValue := range string(data) {
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if unicode.IsPrint(runeValue) || unicode.IsSpace(runeValue) {
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printableCount++
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} else if unicode.IsControl(runeValue) {
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controlCount++
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}
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}
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totalChars := len(data)
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printableRatio := float64(printableCount) / float64(totalChars)
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controlRatio := float64(controlCount) / float64(totalChars)
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return printableRatio > 0.7 && controlRatio < 0.3
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}
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func printPacketInfo(packet gopacket.Packet) {
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var srcIP, dstIP net.IP
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var srcPort, dstPort int
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@ -312,57 +210,43 @@ func printWithColors(info PacketInfo) {
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if len(payloadDisplay) != 0 {
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if isLikelyPlainText([]byte(payloadDisplay)) {
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reg := regexp.MustCompile(`[\s\r\n\v\f]+`)
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payloadDisplay = reg.ReplaceAllString(payloadDisplay, " ")
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payloadDisplay = strings.TrimSpace(payloadDisplay)
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payloadDisplay = strings.TrimSpace(reg.ReplaceAllString(payloadDisplay, " "))
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format := "%sPayload: %s%s%s"
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if len(payloadDisplay) > 100 {
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payloadDisplay = fmt.Sprintf("%sPayload: %s%s... %s(%d)%s", ColorCyan, ColorPurple, payloadDisplay[:100], ColorDarkGrey, len(payloadDisplay), ColorReset)
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payloadDisplay = fmt.Sprintf(format, ColorCyan, ColorPurple, payloadDisplay[:100]+"... "+fmt.Sprintf("%s(%d)%s", ColorDarkGrey, len(payloadDisplay), ColorReset), ColorReset)
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} else {
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payloadDisplay = fmt.Sprintf("%sPayload: %s%s%s", ColorCyan, ColorPurple, payloadDisplay, ColorReset)
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payloadDisplay = fmt.Sprintf(format, ColorCyan, ColorPurple, payloadDisplay, ColorReset)
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}
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} else {
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payloadDisplay = fmt.Sprintf("%sPayload: %sNon-printable data %s(%d)%s", ColorCyan, ColorPurple, ColorDarkGrey, len(payloadDisplay), ColorReset)
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}
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}
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srcPortDisplay := ""
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srcPortDisplay := fmt.Sprintf("%d", info.SourcePort)
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dstPortDisplay := fmt.Sprintf("%d", info.DestPort)
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if info.SourcePort == 0 {
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srcPortDisplay = ""
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} else {
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srcPortDisplay = fmt.Sprintf("%d", info.SourcePort)
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}
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dstPortDisplay := ""
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if info.DestPort == 0 {
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dstPortDisplay = ""
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} else {
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dstPortDisplay = fmt.Sprintf("%d", info.DestPort)
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}
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protocolColor := ""
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switch info.Protocol {
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case "TCP":
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protocolColor = ColorGreen
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case "UDP":
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protocolColor = ColorYellow
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case "ICMP":
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protocolColor = ColorPurple
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protocolColorMap := map[string]string{
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"TCP": ColorGreen,
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"UDP": ColorYellow,
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"ICMP": ColorPurple,
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}
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protocolColor := protocolColorMap[info.Protocol]
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extraData := " "
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if info.Protocol == "ICMP" {
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extraData = fmt.Sprintf("%3s", info.ICMPData)
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} else if info.Protocol == "UDP" {
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extraData = " "
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} else if info.Protocol == "TCP" {
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if info.TCPFlags == "" {
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extraData = " "
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} else {
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} else if info.Protocol == "TCP" && info.TCPFlags != "" {
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extraData = info.TCPFlags
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}
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}
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SEP := ColorDarkGrey + "│" + ColorReset
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fmt.Printf("%s %s %s %s %15s %-5s -> %15s %-5s %s %s %4d %s %s %3d %s %s %5d %s %s %5d %s %s %s %s\n",
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fmt.Printf("%s %s %s %s %15s %-5s -> %15s %-5s %s %s %5d %s %s %3d %s %s %5d %s %s %5d %s %s %s %s\n",
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ColorDarkGrey+info.Timestamp+ColorReset,
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SEP,
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protocolColor+fmt.Sprintf("%4s", info.Protocol)+ColorReset,
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@ -386,47 +270,3 @@ func printWithColors(info PacketInfo) {
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)
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}
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func writeToFile(data []byte) {
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fileName := "packet_info.json"
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file, err := os.OpenFile(fileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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fmt.Println("Error opening file:", err)
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return
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}
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defer file.Close()
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_, err = file.Write(data)
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if err != nil {
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fmt.Println("Error writing to file:", err)
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return
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}
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_, err = file.WriteString("\n")
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if err != nil {
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fmt.Println("Error writing newline to file:", err)
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return
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}
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}
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func getTCPFlags(tcp *layers.TCP) string {
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flagNames := map[bool]string{
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tcp.FIN: "FIN",
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tcp.SYN: "SYN",
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tcp.RST: "RST",
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tcp.PSH: "PSH",
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tcp.ACK: "ACK",
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tcp.URG: "URG",
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tcp.ECE: "ECE",
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tcp.CWR: "CWR",
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tcp.NS: "NS",
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}
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var flags []string
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for flag, name := range flagNames {
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if flag {
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flags = append(flags, name)
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}
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}
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return strings.Join(flags, ",")
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}
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BIN
ddosmonit/dmon
BIN
ddosmonit/dmon
Binary file not shown.
@ -1,8 +1,8 @@
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module dmon
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module ddosmonit
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go 1.21.5
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require (
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github.com/google/gopacket v1.1.19 // indirect
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github.com/google/gopacket v1.1.19 // direct
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golang.org/x/sys v0.0.0-20190412213103-97732733099d // indirect
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)
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144
ddosmonit/utils.go
Normal file
144
ddosmonit/utils.go
Normal file
@ -0,0 +1,144 @@
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package main
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import (
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"fmt"
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"net"
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"os"
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"strconv"
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"strings"
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"unicode"
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"github.com/google/gopacket"
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"github.com/google/gopacket/layers"
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)
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func containsIP(ips []net.IP, ip net.IP) bool {
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for _, listedIP := range ips {
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if ip.Equal(listedIP) {
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return true
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}
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}
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return false
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}
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func containsPort(ports []int, port int) bool {
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for _, listedPort := range ports {
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if port == listedPort {
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return true
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}
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}
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return false
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}
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func getInterfaceMAC(interfaceName string) (net.HardwareAddr, error) {
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iface, err := net.InterfaceByName(interfaceName)
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if err != nil {
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return nil, err
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}
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return iface.HardwareAddr, nil
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}
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func getTCPFlags(tcp *layers.TCP) string {
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flagNames := map[bool]string{
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tcp.FIN: "FIN",
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tcp.SYN: "SYN",
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tcp.RST: "RST",
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tcp.PSH: "PSH",
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tcp.ACK: "ACK",
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tcp.URG: "URG",
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tcp.ECE: "ECE",
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tcp.CWR: "CWR",
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tcp.NS: "NS",
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}
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var flags []string
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for flag, name := range flagNames {
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if flag {
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flags = append(flags, name)
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}
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}
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return strings.Join(flags, ",")
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}
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func isLikelyPlainText(data []byte) bool {
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if len(data) == 0 {
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return false
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}
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var printableCount, controlCount int
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for _, runeValue := range string(data) {
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if unicode.IsPrint(runeValue) || unicode.IsSpace(runeValue) {
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printableCount++
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} else if unicode.IsControl(runeValue) {
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controlCount++
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}
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}
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totalChars := len(data)
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printableRatio := float64(printableCount) / float64(totalChars)
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controlRatio := float64(controlCount) / float64(totalChars)
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return printableRatio > 0.7 && controlRatio < 0.3
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}
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func parseAndValidateIPsAndPorts(list string) ([]net.IP, []int) {
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var ips []net.IP
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var ports []int
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items := strings.Split(list, ",")
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for _, item := range items {
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item = strings.TrimSpace(item)
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if ip := net.ParseIP(item); ip != nil {
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ips = append(ips, ip)
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} else if port, err := strconv.Atoi(item); err == nil {
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ports = append(ports, port)
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}
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}
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return ips, ports
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}
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func shouldProcessPacket(packet gopacket.Packet, excludeIPs []net.IP, excludePorts []int, includeIPs []net.IP, includePorts []int) bool {
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var srcIP, dstIP net.IP
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var srcPort, dstPort int
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if ipv4Layer := packet.Layer(layers.LayerTypeIPv4); ipv4Layer != nil {
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ipv4 := ipv4Layer.(*layers.IPv4)
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srcIP, dstIP = ipv4.SrcIP, ipv4.DstIP
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}
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if tcpLayer := packet.Layer(layers.LayerTypeTCP); tcpLayer != nil {
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tcp := tcpLayer.(*layers.TCP)
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srcPort, dstPort = int(tcp.SrcPort), int(tcp.DstPort)
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} else if udpLayer := packet.Layer(layers.LayerTypeUDP); udpLayer != nil {
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udp := udpLayer.(*layers.UDP)
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srcPort, dstPort = int(udp.SrcPort), int(udp.DstPort)
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}
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isExcluded := containsIP(excludeIPs, srcIP) || containsIP(excludeIPs, dstIP) ||
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containsPort(excludePorts, srcPort) || containsPort(excludePorts, dstPort)
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isIncluded := (len(includeIPs) == 0 || containsIP(includeIPs, srcIP) || containsIP(includeIPs, dstIP)) &&
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(len(includePorts) == 0 || containsPort(includePorts, srcPort) || containsPort(includePorts, dstPort))
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return !isExcluded && isIncluded
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}
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func writeToFile(data []byte) {
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fileName := "packet_info.json"
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file, err := os.OpenFile(fileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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fmt.Println("Error opening file:", err)
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return
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}
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defer file.Close()
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_, err = file.Write(data)
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if err != nil {
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fmt.Println("Error writing to file:", err)
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return
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}
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_, err = file.WriteString("\n")
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if err != nil {
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fmt.Println("Error writing newline to file:", err)
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return
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}
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}
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