simcard message trans/receiver simulator - simulation

Question

We have a project that we should send message to a huge number of sim cards (more than 1 Million) and receive and handle answers.
For testing this, I am using Selenium SMPPSim to simulate sending a message.
this is work fine for sending messages. and with enabling callback server I can receive messages that I send on another port.
But my question is how can I send back a message to SMPP server?
I am using EasySMPP library for connecting to smpp server
My SMPP Server Code:
private SMPPClient _client;
private readonly object _lockObject = new object();
public SMPPClient GetClient()
{
if (_client != null)
{
return _client;
}
lock (_lockObject)
{
_client = new SMPPClient();
var smsc = new SMSC
{
Host = "127.0.0.1",
Port = 2775,
SystemId = "smppclient1",
Password = "password",
SourceTon = 5,
SourceNpi = 1,
AddrTon = 1,
AddrNpi = 1,
SystemType = "8945",
};
_client.OnDeliverSm += Client_OnDeliverSm;
Console.WriteLine("Client_OnDeliverSm added");
_client.OnSubmitSmResp += Client_OnSubmitSmResp;
Console.WriteLine("OnSubmitSmResp added");
_client.AddSMSC(smsc);
if (!_client.Connect())
throw new Exception($"Can not connect to smpp link: {smsc.Host} : {smsc.Port}");
return _client;
}
}
public void SendByCampaignItemId()
{
var smppClient = GetClient();
lock (smppClient)
{
var msgId = smppClient.SubmitSM(1, 1, "339123456789", 1, 1, "339632587436",
0x40, // EsmClass.UdhIndicator
0x7f, // protocol identifier
0, // priority flag level 0
DateTime.MinValue,
DateTime.MinValue,
// DateTime.Now.AddMinutes(10),
//DateTime.Now.AddHours(3),
(byte)DeliveryReportType.AlwaysSendDeliveryReport,
0x00, //replace if present
0xf6, // data coding
0, // default msg id
new byte[] { 0x02,0x70,0x00,0x34,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF});
}
}
private void Client_OnSubmitSmResp(SubmitSmRespEventArgs e)
{
Console.WriteLine("Submit Received");
}
private void Client_OnDeliverSm(DeliverSmEventArgs e)
{
Console.WriteLine("Deliver Received");
}
And here is my code which listens to port 3333:
static void Main(string[] args)
{
TcpListener server = null;
try
{
Int32 port = 3333;
IPAddress localAddr = IPAddress.Parse("127.0.0.1");
server = new TcpListener(localAddr, port);
server.Start();
// Buffer for reading data
Byte[] bytes = new Byte[256];
String data = null;
while (true)
{
Console.Write("Waiting for a connection... ");
TcpClient client = server.AcceptTcpClient();
Console.WriteLine("Connected!");
data = null;
NetworkStream stream = client.GetStream();
int i;
while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
{
data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
Console.WriteLine("Received: {0}", data);
data = data.ToUpper();
byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);
stream.Write(msg, 0, msg.Length);
//WHAT SHOULD I DO HERE SO THAT I CAN SEND BACK A MESSAGE (DELIVER SM) TO SMPP SIM??!!!
Console.WriteLine("Sent: {0}", data);
}
client.Close();
}
}
catch (SocketException e)
{
Console.WriteLine("SocketException: {0}", e);
}
finally
{
server.Stop();
}
Console.WriteLine("\nHit enter to continue...");
Console.Read();
}
And my SMPPSIM Config file :
SMPP_PORT=2775
SMPP_CONNECTION_HANDLERS=10
CONNECTION_HANDLER_CLASS=com.seleniumsoftware.SMPPSim.StandardConnectionHandler
PROTOCOL_HANDLER_CLASS=com.seleniumsoftware.SMPPSim.StandardProtocolHandler
LIFE_CYCLE_MANAGER=com.seleniumsoftware.SMPPSim.LifeCycleManager
MESSAGE_STATE_CHECK_FREQUENCY=5000
MAX_TIME_ENROUTE=10000
DELAY_DELIVERY_RECEIPTS_BY=0
PERCENTAGE_THAT_TRANSITION=75
PERCENTAGE_DELIVERED=90
PERCENTAGE_UNDELIVERABLE=6
PERCENTAGE_ACCEPTED=2
PERCENTAGE_REJECTED=2
DISCARD_FROM_QUEUE_AFTER=60000
HTTP_PORT=88
HTTP_THREADS=1
DOCROOT=www
AUTHORISED_FILES=/css/style.css,/index.htm,/inject_mo.htm,/favicon.ico,/images/logo.gif,/images/dots.gif,/user-guide.htm,/images/homepage.gif,/images/inject_mo.gif
INJECT_MO_PAGE=/inject_mo.htm
SYSTEM_IDS=smppclient1,smppclient2
PASSWORDS=password,password
OUTBIND_ENABLED=false
OUTBIND_ESME_IP_ADDRESS=127.0.0.1
OUTBIND_ESME_PORT=2776
OUTBIND_ESME_SYSTEMID=smppclient1
OUTBIND_ESME_PASSWORD=password
DELIVERY_MESSAGES_PER_MINUTE=0
DELIVER_MESSAGES_FILE=deliver_messages.csv
LOOPBACK=TRUE
ESME_TO_ESME=false
OUTBOUND_QUEUE_MAX_SIZE=1000
INBOUND_QUEUE_MAX_SIZE=1000
DELAYED_INBOUND_QUEUE_PROCESSING_PERIOD=60
DELAYED_INBOUND_QUEUE_MAX_ATTEMPTS=100
DECODE_PDUS_IN_LOG=true
CAPTURE_SME_BINARY=false
CAPTURE_SME_BINARY_TO_FILE=sme_binary.capture
CAPTURE_SMPPSIM_BINARY=false
CAPTURE_SMPPSIM_BINARY_TO_FILE=smppsim_binary.capture
CAPTURE_SME_DECODED=false
CAPTURE_SME_DECODED_TO_FILE=sme_decoded.capture
CAPTURE_SMPPSIM_DECODED=false
CAPTURE_SMPPSIM_DECODED_TO_FILE=smppsim_decoded.capture
CALLBACK=true
CALLBACK_ID=SIM1
CALLBACK_TARGET_HOST=localhost
CALLBACK_PORT=3333
DELIVER_SM_INCLUDES_USSD_SERVICE_OP=false
DELIVERY_RECEIPT_OPTIONAL_PARAMS=true
DELIVERY_RECEIPT_TLV=1403/0A/34343132333435363738
SMSCID=SMPPSim
SIMULATE_VARIABLE_SUBMIT_SM_RESPONSE_TIMES=false
And another question:
If SMPPSim is not a good choice for my work, what else can i use?
UPDATE 1:
I look a little more and I think I find a simpler question.
assume that i have to SMPPSims.
How can I send message from a SMPPSim to another one?