magic

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
+}
+