Initial commit

2024-07-22 19:58:07 +02:00
commit cd8322cc5a
11 changed files with 354 additions and 0 deletions
--- a/main.go
+++ b/main.go
@@ -0,0 +1,162 @@
+package main
+
+import (
+	"bytes"
+	"encoding/binary"
+	"log"
+	"net"
+	"sync"
+)
+
+func init() {
+	log.SetFlags(log.Lmicroseconds)
+}
+
+// Function to create a submit_sm PDU
+func createSubmitSMPDU() []byte {
+	// Example values for the submit_sm PDU fields
+	serviceType := "CMT"
+	sourceAddrTON := byte(0x01)
+	sourceAddrNPI := byte(0x01)
+	sourceAddr := "12345"
+	destAddrTON := byte(0x01)
+	destAddrNPI := byte(0x01)
+	destinationAddr := "67890"
+	esmClass := byte(0x00)
+	protocolID := byte(0x00)
+	priorityFlag := byte(0x00)
+	scheduleDeliveryTime := ""
+	validityPeriod := ""
+	registeredDelivery := byte(0x01)
+	replaceIfPresentFlag := byte(0x00)
+	dataCoding := byte(0x00)
+	smDefaultMsgID := byte(0x00)
+	shortMessage := "Hello, SMPP!"
+
+	// Calculate the length of the PDU
+	headerLength := 16
+	bodyLength := 1 + len(serviceType) + 1 + 1 + len(sourceAddr) + 1 + 1 + len(destinationAddr) + 1 + 1 + len(scheduleDeliveryTime) + 1 + len(validityPeriod) + 1 + 1 + 1 + 1 + 1 + len(shortMessage)
+	totalLength := headerLength + bodyLength
+	log.Printf("Total length: %d", totalLength)
+
+	// Create a buffer to hold the PDU
+	var buffer bytes.Buffer
+
+	// Command Length
+	binary.Write(&buffer, binary.BigEndian, uint32(totalLength))
+
+	// Command ID (submit_sm)
+	binary.Write(&buffer, binary.BigEndian, uint32(0x00000004))
+
+	// Command Status (0x00000000 for ESME_ROK)
+	binary.Write(&buffer, binary.BigEndian, uint32(0x00000000))
+
+	// Sequence Number (example value)
+	binary.Write(&buffer, binary.BigEndian, uint32(0x00000001))
+
+	// Service Type
+	buffer.WriteString(serviceType)
+	buffer.WriteByte(0x00)
+
+	// Source Address TON
+	buffer.WriteByte(sourceAddrTON)
+
+	// Source Address NPI
+	buffer.WriteByte(sourceAddrNPI)
+
+	// Source Address
+	buffer.WriteString(sourceAddr)
+	buffer.WriteByte(0x00)
+
+	// Destination Address TON
+	buffer.WriteByte(destAddrTON)
+
+	// Destination Address NPI
+	buffer.WriteByte(destAddrNPI)
+
+	// Destination Address
+	buffer.WriteString(destinationAddr)
+	buffer.WriteByte(0x00)
+
+	// ESM Class
+	buffer.WriteByte(esmClass)
+
+	// Protocol ID
+	buffer.WriteByte(protocolID)
+
+	// Priority Flag
+	buffer.WriteByte(priorityFlag)
+
+	// Schedule Delivery Time
+	buffer.WriteString(scheduleDeliveryTime)
+	buffer.WriteByte(0x00)
+
+	// Validity Period
+	buffer.WriteString(validityPeriod)
+	buffer.WriteByte(0x00)
+
+	// Registered Delivery
+	buffer.WriteByte(registeredDelivery)
+
+	// Replace If Present Flag
+	buffer.WriteByte(replaceIfPresentFlag)
+
+	// Data Coding
+	buffer.WriteByte(dataCoding)
+
+	// SM Default Message ID
+	buffer.WriteByte(smDefaultMsgID)
+
+	// Short Message Length
+	buffer.WriteByte(byte(len(shortMessage)))
+
+	// Short Message
+	buffer.WriteString(shortMessage)
+
+	// Return the PDU as a byte slice
+	return buffer.Bytes()
+}
+
+func main() {
+	// addr := ":2775"
+	// listener, err := net.Listen("tcp", addr)
+	// if err != nil {
+	// 	log.Fatalf("Failed to start SMPP server: %v", err)
+	// }
+	// defer listener.Close()
+	// log.Printf("SMPP server started on %s", addr)
+
+	// go func() {
+	// 	for {
+	// 		conn, err := listener.Accept()
+	// 		if err != nil {
+	// 			log.Printf("Failed to accept connection: %v", err)
+	// 			continue
+	// 		}
+	// 		go handleConnection(conn)
+	// 	}
+	// }()
+
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	conn, err := net.Dial("tcp", "localhost:2775")
+	if err != nil {
+		log.Printf("Failed to connect to SMPP server: %+v", err)
+		return
+	}
+	log.Printf("Connected to SMPP server")
+	defer conn.Close()
+
+	go func() {
+		conn.Write(createSubmitSMPDU())
+		data, err := conn.Read(make([]byte, 1024))
+		if err != nil {
+			log.Printf("Failed to read from connection: %+v", err)
+			return
+		}
+		log.Printf("Received data: %#v", data)
+	}()
+
+	wg.Wait()
+}