SocketException was Unhandled by user code - iphone

Question

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net;
using System.IO;
using System.Text;
using System.Security.Authentication;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Cryptography.X509Certificates;
using Newtonsoft.Json.Linq;
namespace WebApplication1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnPush_Click(object sender, EventArgs e)
{
pushMessage(txtDeviceID.Text.Trim(), txtPayload.Text.Trim());
}
public void pushMessage(string deviceID, string Mesaj)
{
int port = 2195;
String hostname = "ssl://gateway.sandbox.push.apple.com:2195";
String certificatePath = HttpContext.Current.Server.MapPath("PushNotifi.p12");
X509Certificate2 clientCertificate = new X509Certificate2(System.IO.File.ReadAllBytes(certificatePath), "taxmann");
X509Certificate2Collection certificatesCollection = new X509Certificate2Collection(clientCertificate);
TcpClient client = new TcpClient(hostname, port);
SslStream sslStream = new SslStream(client.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null);
try
{
sslStream.AuthenticateAsClient(hostname, certificatesCollection, SslProtocols.Ssl3, false);
MemoryStream memoryStream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(memoryStream);
writer.Write((byte)0); //The command
writer.Write((byte)0); //The first byte of the deviceId length (big-endian first byte)
writer.Write((byte)32); //The deviceId length (big-endian second byte)
writer.Write(HexStringToByteArray(deviceID.ToUpper()));
String payload = "{\"aps\":{\"alert\":{\body\":\"" + Mesaj + "\"},\"badge\":1,\"sound\":\"default\"}}";
writer.Write((byte)0);
writer.Write((byte)payload.Length);
byte[] b1 = System.Text.Encoding.UTF8.GetBytes(payload);
writer.Write(b1);
writer.Flush();
byte[] array = memoryStream.ToArray();
sslStream.Write(array);
sslStream.Flush();
client.Close();
lblResponse.Text = "Sucess..";
}
catch (System.Security.Authentication.AuthenticationException ex)
{
client.Close();
lblResponse.Text = ex.Message;
}
catch (Exception e)
{
client.Close();
lblResponse.Text = e.Message;
}
}
// The following method is invoked by the RemoteCertificateValidationDelegate.
public static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
if (sslPolicyErrors == SslPolicyErrors.None)
return true;
else // Do not allow this client to communicate with unauthenticated servers.
return false;
}
private static byte[] HexStringToByteArray(String DeviceID)
{
//convert Devide token to HEX value.
byte[] deviceToken = new byte[DeviceID.Length / 2];
for (int i = 0; i < deviceToken.Length; i++)
deviceToken[i] = byte.Parse(DeviceID.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber);
return deviceToken;
}
}
}
This is my code. When I run this, then
SocketException was unhandled by user code
on line
TcpClient client = new TcpClient(host-name, port);
when googling system.net.sockets.socketexception and not recognize ssl://gateway.sandbox.push.apple.com:2195 host name
How can I fix this?
Basically this code is for sending Push Notifications to an iPhone application.
I'm using localhost as the server for sending the notification.

Answer 1

I think the problem is your hostname string:
int port = 2195;
String hostname = "ssl://gateway.sandbox.push.apple.com:2195";
TcpClient client = new TcpClient(hostname, port);
The port value (2195) is a separate constructor parameter, so I don't think you should be passing it in the hostname parameter, as well.
Also, the protocol (e.g. ssl://) shouldn't be part of the hostname. The SslStream tells .NET that this is SSL.
If you look at this similar question on stack overflow, you'll see that they use something like this:
int port = 2195;
String hostname = "gateway.sandbox.push.apple.com";
TcpClient client = new TcpClient(hostname, port);
P.S. I think you also had it right, in your original question on this subject