diff --git a/client/golang/client.go b/client/golang/client.go
index ae08b1f..57be36f 100644
--- a/client/golang/client.go
+++ b/client/golang/client.go
@@ -3,15 +3,16 @@ package main
 import (
 	//"encoding/base64"
 	"encoding/binary"
-	"errors"
 	"fmt"
-	"net"
+	//"net"
 
 	//"strings"
 	"time"
 
 	"github.com/google/gopacket"
 	"github.com/google/gopacket/pcap"
+
+	"client/utils"
 )
 
 type SaprusHeaderPacket struct {
@@ -75,40 +76,8 @@ func listenDiscoverResponse(addrChan chan string, readyFlag chan int) {
 	return
 }
 
-func toMaxHost(n *net.IPNet) (net.IP, error) {
-	if n.IP.To4() == nil {
-		return net.IP{}, errors.New("IP address is not IPv4")
-	}
-
-	ip := make(net.IP, len(n.IP.To4()))
-	binary.BigEndian.PutUint32(ip,
-		binary.BigEndian.Uint32(n.IP.To4())|^binary.BigEndian.Uint32(net.IP(n.Mask).To4()))
-
-	return ip, nil
-}
-
-func bcastAddresses() []string {
-	var addrs []string = nil
-	interfaceInfo, _ := net.Interfaces()
-	for i := 0; i < len(interfaceInfo); i++ {
-		addr, err := interfaceInfo[i].Addrs()
-		errCheck(err)
-		for j := 0; j < len(addr); j++ {
-			_, ipNet, _ := net.ParseCIDR(addr[j].String())
-			bcast, err := toMaxHost(ipNet)
-
-			if err != nil {
-			} else {
-				addrs = append(addrs, bcast.String())
-			}
-		}
-	}
-
-	return addrs
-}
-
 func main() {
-	sendAddrs := bcastAddresses()
+	sendAddrs := []string{"255.255.255.255"}
 
 	addrChan := make(chan string)
 	readyFlag := make(chan int)
@@ -119,15 +88,9 @@ func main() {
 	<- readyFlag
 
 	for i := 0; i < len(sendAddrs); i++ {
-		remoteAddr := sendAddrs[i] + ":8888"
-		remote, err := net.ResolveUDPAddr("udp4", remoteAddr)
-		errCheck(err)
-		conn, err := net.DialUDP("udp4", nil, remote)
-		errCheck(err)
-		defer conn.Close()
+		c := utils.SocketCall{}
 
-		_, err = conn.Write([]byte(conn.LocalAddr().String() + "here"))
-		errCheck(err)
+		c.SendData("hello")
 	}
 
 	// Listen timeout
diff --git a/client/golang/go.mod b/client/golang/go.mod
index 6d94347..0cd0963 100644
--- a/client/golang/go.mod
+++ b/client/golang/go.mod
@@ -2,6 +2,15 @@ module client
 
 go 1.18
 
-require github.com/google/gopacket v1.1.19
+require (
+	github.com/google/gopacket v1.1.19
+	github.com/mdlayher/packet v1.1.1
+)
 
-require golang.org/x/sys v0.0.0-20190412213103-97732733099d // indirect
+require (
+	github.com/josharian/native v1.0.0 // indirect
+	github.com/mdlayher/socket v0.4.0 // indirect
+	golang.org/x/net v0.2.0 // indirect
+	golang.org/x/sync v0.1.0 // indirect
+	golang.org/x/sys v0.2.0 // indirect
+)
diff --git a/client/golang/go.sum b/client/golang/go.sum
index a915606..d5145cb 100644
--- a/client/golang/go.sum
+++ b/client/golang/go.sum
@@ -1,5 +1,11 @@
 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/josharian/native v1.0.0 h1:Ts/E8zCSEsG17dUqv7joXJFybuMLjQfWE04tsBODTxk=
+github.com/josharian/native v1.0.0/go.mod h1:7X/raswPFr05uY3HiLlYeyQntB6OO7E/d2Cu7qoaN2w=
+github.com/mdlayher/packet v1.1.1 h1:7Fv4OEMYqPl7//uBm04VgPpnSNi8fbBZznppgh6WMr8=
+github.com/mdlayher/packet v1.1.1/go.mod h1:DRvYY5mH4M4lUqAnMg04E60U4fjUKMZ/4g2cHElZkKo=
+github.com/mdlayher/socket v0.4.0 h1:280wsy40IC9M9q1uPGcLBwXpcTQDtoGwVt+BNoITxIw=
+github.com/mdlayher/socket v0.4.0/go.mod h1:xxFqz5GRCUN3UEOm9CZqEJsAbe1C8OwSK46NlmWuVoc=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
@@ -7,10 +13,16 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
+golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/client/golang/structs/file_transfer.go b/client/golang/structs/file_transfer.go
new file mode 100644
index 0000000..abab9da
--- /dev/null
+++ b/client/golang/structs/file_transfer.go
@@ -0,0 +1,21 @@
+package structs
+
+import (
+)
+
+type SaprusFileTransfer struct {
+        Flag            [1]byte
+        Sequence        [2]byte
+        Checksum        [2]byte
+        Payload         []byte
+}
+
+func (c SaprusFileTransfer) Bytes() []byte {
+        data := []byte{}
+        data = append(data, c.Flag[0])
+        data = append(data, c.Sequence[0], c.Sequence[1])
+        data = append(data, c.Checksum[0], c.Checksum[1])
+        data = append(data, c.Payload...)
+        return data
+}
+
diff --git a/client/golang/structs/message.go b/client/golang/structs/message.go
new file mode 100644
index 0000000..9459a56
--- /dev/null
+++ b/client/golang/structs/message.go
@@ -0,0 +1,21 @@
+package structs
+
+import (
+)
+
+type SaprusClientMessage struct {
+        Flag            [1]byte
+        Sequence        [2]byte
+        Checksum        [2]byte
+        Payload         []byte
+}
+
+func (c SaprusClientMessage) Bytes() []byte {
+        data := []byte{}
+        data = append(data, c.Flag[0])
+        data = append(data, c.Sequence[0], c.Sequence[1])
+        data = append(data, c.Checksum[0], c.Checksum[1])
+        data = append(data, c.Payload...)
+        return data
+}
+
diff --git a/client/golang/structs/saprus.go b/client/golang/structs/saprus.go
new file mode 100644
index 0000000..6e253d7
--- /dev/null
+++ b/client/golang/structs/saprus.go
@@ -0,0 +1,18 @@
+package structs
+
+import (
+)
+
+type SaprusHeaderFrame struct {
+        PacketType  [2]byte
+        Length      [2]byte
+        Payload     []byte
+}
+
+func (c SaprusHeaderFrame) Bytes() []byte {
+        data := []byte{}
+        data = append(data, c.PacketType[0], c.PacketType[1])
+        data = append(data, c.Length[0], c.Length[1])
+        data = append(data, c.Payload...)
+        return data
+}
diff --git a/client/golang/utils/file_transfer.go b/client/golang/utils/file_transfer.go
new file mode 100644
index 0000000..287a511
--- /dev/null
+++ b/client/golang/utils/file_transfer.go
@@ -0,0 +1,92 @@
+package utils
+
+import (
+        "log"
+
+        "github.com/google/gopacket"
+
+        "client/structs"
+)
+
+func (c*SocketCall) BuildFileTransferPacket(Header structs.SaprusHeaderFrame,
+                                Data structs.SaprusFileTransfer) gopacket.SerializeBuffer {
+        eth, ip, udp := basePacket(c)
+
+        sapHeader := structs.SaprusHeaderFrame {
+                PacketType:     Header.PacketType,
+                Length:         c.saprusPayloadLength(Data.Bytes()),
+                Payload:        Data.Bytes(),
+        }
+
+        buf := gopacket.NewSerializeBuffer()
+        opts := gopacket.SerializeOptions {
+                ComputeChecksums:       true,
+                FixLengths:             true,
+        }
+
+        udp.SetNetworkLayerForChecksum(&ip)
+        err := gopacket.SerializeLayers(buf, opts, &eth, &ip, &udp, gopacket.Payload(sapHeader.Bytes()))
+
+        if err != nil {
+                log.Panic(err)
+        }
+
+        return buf
+}
+
+func (c* SocketCall) FileTransferPacket(message string, seqNum uint16) gopacket.SerializeBuffer {
+        sapFile := structs.SaprusFileTransfer {
+                Flag:           [1]byte{0x11},
+                Sequence:       [2]byte{byte(seqNum >> 8), byte(seqNum & 0xFF)},
+                Checksum:       [2]byte{0x44, 0x44},
+                Payload:        []byte(message),
+        }
+
+        sapHeader := structs.SaprusHeaderFrame {
+                PacketType:     [2]byte{0x88, 0x88},
+                Length:         c.saprusPayloadLength(sapFile.Bytes()),
+                Payload:        sapFile.Bytes(),
+        }
+
+        buf := c.BuildFileTransferPacket(sapHeader, sapFile)
+
+        return buf
+}
+
+func (c* SocketCall) InitFileTransferPacket() gopacket.SerializeBuffer {
+        sapFile := structs.SaprusFileTransfer {
+                Flag:           [1]byte{0x01},
+                Sequence:       [2]byte{0x00, 0x00},
+                Checksum:       [2]byte{0x00, 0x00},
+                Payload:        []byte{},
+        }
+
+        sapHeader := structs.SaprusHeaderFrame {
+                PacketType:     [2]byte{0x00, 0x00},
+                Length:         c.saprusPayloadLength(sapFile.Bytes()),
+                Payload:        sapFile.Bytes(),
+        }
+
+        buf := c.BuildFileTransferPacket(sapHeader, sapFile)
+
+        return buf
+}
+
+func (c* SocketCall) EndFileTransferPacket() gopacket.SerializeBuffer {
+        sapFile := structs.SaprusFileTransfer {
+                Flag:           [1]byte{0x02},
+                Sequence:       [2]byte{0x00, 0x00},
+                Checksum:       [2]byte{0x00, 0x00},
+                Payload:        []byte{},
+        }
+
+        sapHeader := structs.SaprusHeaderFrame {
+                PacketType:     [2]byte{0x00, 0x00},
+                Length:         c.saprusPayloadLength(sapFile.Bytes()),
+                Payload:        sapFile.Bytes(),
+        }
+
+        buf := c.BuildFileTransferPacket(sapHeader, sapFile)
+
+        return buf
+}
diff --git a/client/golang/utils/packet_helper.go b/client/golang/utils/packet_helper.go
new file mode 100644
index 0000000..2f6b76a
--- /dev/null
+++ b/client/golang/utils/packet_helper.go
@@ -0,0 +1,27 @@
+package utils
+
+import (
+	"github.com/google/gopacket/layers"
+)
+
+func basePacket(c* SocketCall) (layers.Ethernet, layers.IPv4, layers.UDP) {
+        eth := layers.Ethernet {
+                EthernetType:   layers.EthernetTypeIPv4,
+                SrcMAC:         c.Iface.HardwareAddr,
+                DstMAC:         layers.EthernetBroadcast,
+        }
+        ip := layers.IPv4 {
+                Version:        4,
+                TTL:            64,
+                SrcIP:          []byte{0, 0, 0, 0},
+                DstIP:          []byte{255, 255, 255, 255},
+                Protocol:       layers.IPProtocolUDP,
+        }
+        udp := layers.UDP {
+                SrcPort:        8850,
+                DstPort:        8888,
+        }
+
+        return eth, ip, udp
+}
+
diff --git a/client/golang/utils/raw.go b/client/golang/utils/raw.go
new file mode 100644
index 0000000..c85db19
--- /dev/null
+++ b/client/golang/utils/raw.go
@@ -0,0 +1,88 @@
+package utils
+
+import (
+        "encoding/binary"
+        "log"
+        "time"
+
+        "net"
+        "unicode/utf8"
+
+        "github.com/google/gopacket"
+        "github.com/google/gopacket/layers"
+        "github.com/mdlayher/packet"
+)
+
+type SocketCall struct {
+        conn    *packet.Conn
+        Iface   *net.Interface
+}
+
+
+func splitData(message string) []string {
+        data := []string{}
+        maxPacketLength := 1449
+
+        var i, j int
+
+        for i, j = 0, maxPacketLength; j < len(message); i, j = j, j+maxPacketLength {
+                for !utf8.RuneStart(message[j]) {
+                        j--
+                }
+                data = append(data, message[i:j])
+        }
+        data = append(data, message[i:])
+
+        return data
+}
+
+func GetAdapter() string {
+	inetInterface := ""
+	inetInterfaces, _ := net.Interfaces()
+	if inetInterfaces[0].Name == "lo" {
+		inetInterface = inetInterfaces[1].Name
+	} else {
+		inetInterface = inetInterfaces[0].Name
+	}
+	return inetInterface
+}
+
+func (c* SocketCall) SendPackage(buf gopacket.SerializeBuffer) error {
+        _, err := c.conn.WriteTo(buf.Bytes(), &packet.Addr{HardwareAddr: layers.EthernetBroadcast})
+        return err
+}
+
+func (c* SocketCall)SendData(message string) {
+        iface, _ := net.InterfaceByName(GetAdapter())
+        c.Iface = iface
+
+        conn, err := packet.Listen(iface, packet.Raw, int(layers.EthernetTypeIPv4), nil)
+        c.conn = conn
+
+        if err != nil {
+                log.Panic(err)
+        }
+
+        splitMessage := splitData(message)
+
+        for i := 0; i < len(splitMessage); i++ {
+                c.SendPackage(c.FileTransferPacket(splitMessage[i], uint16(i)))
+                time.Sleep(20 * time.Microsecond)
+
+        time.Sleep(200 * time.Microsecond)
+
+        return
+	}
+}
+
+func (c* SocketCall) saprusPayloadLength(pkt []byte) [2]byte{
+        payloadLength := make([]byte, 2)
+        var length [2]byte
+        binary.BigEndian.PutUint16(payloadLength, uint16(len(pkt)))
+
+        length[0] = payloadLength[0]
+        length[1] = payloadLength[1]
+
+        return length
+}
+
diff --git a/server/README.md b/server/README.md
index 949d45e..652af7c 100644
--- a/server/README.md
+++ b/server/README.md
@@ -49,3 +49,17 @@ Saprus Type: 0x88 0x88
 |                                            Payload                                            |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 ```
+
+## hold
+
+Saprus Type: 0x00 0x3C
+
+```
+ 0                   1                   2                   3                   4
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|              Dest             |                                                               |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                                                               +
+|                                            Payload                                            |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+```
diff --git a/server/server.go b/server/server.go
index a31b9c9..1941974 100644
--- a/server/server.go
+++ b/server/server.go
@@ -1,18 +1,15 @@
 package main
 
 import (
-	"encoding/base64"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"net"
-	"strings"
 
 	"saprusserver/utils"
 )
 
 func welcomeMessage() {
-	msg :=`Welcome to --
+	msg :=`
   ██████  ▄▄▄       ██▓███   ██▀███   █    ██   ██████
 ▒██    ▒ ▒████▄    ▓██░  ██▒▓██ ▒ ██▒ ██  ▓██▒▒██    ▒
 ░ ▓██▄   ▒██  ▀█▄  ▓██░ ██▓▒▓██ ░▄█ ▒▓██  ▒██░░ ▓██▄
@@ -36,15 +33,9 @@ func checkError(err error) {
 
 func main() {
 	welcomeMessage()
-	log.Printf("Starting server\n")
-	con := utils.SocketCall{}
-	serv, err := net.ListenPacket("udp4", ":8888")
-	serverIP := "aaa"
-	msg := "clientapi: " + serverIP
-	fileBuf, _ := ioutil.ReadFile("./script.sh")
-	msg = string(fileBuf)
-	b64Msg := base64.StdEncoding.EncodeToString([]byte(msg))
+	log.Println("Starting server")
 
+	serv, err := net.ListenPacket("udp4", ":8888")
 	checkError(err)
 
 	defer serv.Close()
@@ -53,17 +44,8 @@ func main() {
 
 	for {
 		_, addr, err := serv.ReadFrom(buff)
-
 		checkError(err)
 
-		remoteAddr := strings.Split(addr.String(), ":")
-
-		log.Printf("Received data %s\n", remoteAddr)
-
-		checkError(err)
-
-		con.SendData(b64Msg)
-
-		log.Printf("Sending data to %s\n", addr)
+		go utils.ProcessRequests(buff, addr)
 	}
 }
diff --git a/server/structs/saprus.go b/server/structs/saprus.go
index 58a6999..e2d97a2 100644
--- a/server/structs/saprus.go
+++ b/server/structs/saprus.go
@@ -3,6 +3,14 @@ package structs
 import (
 )
 
+type UDPPackage struct {
+	SourcePort  	[2]byte
+	Destport    	[2]byte
+	Length		[2]byte
+	Checksum	[2]byte
+
+}
+
 type SaprusHeaderFrame struct {
         PacketType  [2]byte
         Length      [2]byte
@@ -16,4 +24,3 @@ func (c SaprusHeaderFrame) Bytes() []byte {
 	data = append(data, c.Payload...)
 	return data
 }
-
diff --git a/server/utils/service.go b/server/utils/service.go
index 4b267fe..ffb1c55 100644
--- a/server/utils/service.go
+++ b/server/utils/service.go
@@ -1,6 +1,44 @@
 package utils
 
 import (
+	"encoding/base64"
+	"log"
+	"net"
+	"strings"
 
+	"saprusserver/structs"
 )
 
+func (c *SocketCall) GatherSaprusHeader(buf []byte) structs.SaprusHeaderFrame {
+	data := structs.SaprusHeaderFrame {
+		PacketType:     [2]byte{buf[0], buf[1]},
+                Length:         [2]byte{buf[2], buf[3]},
+	}
+	return data
+}
+
+func ProcessRequests(buf []byte, addr net.Addr) {
+	c := SocketCall{}
+
+	msg := "hello world"
+	b64Msg := base64.StdEncoding.EncodeToString([]byte(msg))
+
+	saprusHeader := c.GatherSaprusHeader(buf)
+
+	remoteAddr := strings.Split(addr.String(), ":")
+
+	switch {
+		case strings.Contains(string(buf), "here"):
+			log.Printf("Sending Data to %s\n", remoteAddr)
+			c.SendData(b64Msg)
+		case saprusHeader.PacketType == [2]byte{0x88, 0x88}:
+			log.Printf("New find:: %s\n", remoteAddr)
+			c.SendData(base64.StdEncoding.EncodeToString([]byte("hello\n")))
+		case saprusHeader.PacketType == [2]byte{0x00, 0x3C}:
+			log.Printf("Broadcast message::%s\n", remoteAddr)
+		default:
+			log.Printf("Packet type not found::%x\n", string(saprusHeader.PacketType[:]))
+	}
+
+	return
+}