magic

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                                            |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+```

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)
 	}
 }

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
 }
-

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
+}