Create Packet Header Using Socket Programming C#?
Jun 11, 2010I want to create custom packet header and append it to data.and send the data to remote machine using socket programming C#.
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Sep 3, 2013I downloaded your codes for fetching and reading of emails from POP3 mail server and tried it, however when i run it i got this error: The handshake failed due to an unexpected packet format.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.IO.IOException: The handshake failed due to an unexpected packet format.
Source Error:
Line 16: {
Line 17: pop3Client = new Pop3Client();
Line 18: pop3Client.Connect(txtMailServer.Text, int.Parse(txtPort.Text), chkSSL.Checked);
Line 19: pop3Client.Authenticate(txtUserName.Text, txtPassword.Text);
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> use LWP::UserAgent; $ua = new
> LWP::UserAgent(agent => 'Mozilla/5.0(Windows; U; Windows NT 5.1; en-US; rv:1.8.0.5)Gecko/20060719 Firefox/1.5.0.5');
> $ua -> timeout(20);
> my $req = POST 'http://Example.com/',
> [ login_username => 'mehdi' , login22 => '654321' , go => 'submit'];
> my $content = $ua->request($req);
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Socket tempSocket =new
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SocketType.Stream,
ProtocolType.Tcp);
The tempSocket is connected to the particular IP and tempSocket.Connected is giving me value as True. But the property MultiCastLoopBack property is giving me the following error with error code 10042.
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<asp:Panel ID="pnlPerson" runat="server">
<table border="1" style="font-family: Arial; font-size: 10pt; width: 200px">
<tr>
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[code]....
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Oct 22, 2010Am using socket connection to send and receive values. The following code is used to receive response.
[Code]....
In the above code, am facing a prob in skt.Available. If i dont give the thread.sleep, it is not repeating the while loop and it exits after onetime. And if i dont give skt.Available line, sometimes it throws socket Exception. I do not want to use thread.sleep. Does anyone knows why this is happening and how can i resolve this?
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May 26, 2010I wrote a small socket client application talking to my asp.net server application.
On the asp.net side, I created a IHttpHandler. I want to send data back and forth on one HTTP request.
I tried the following code which run an infinite loop inside function ProcessRequest(). The client side opens a socket connection and send HTTP POST request.
I am not sure how asp.net work. In HTTP POST I have to specify Content-Length, I tried a small value, like 20, then asp.net handler can only get 20 bytes in the inputstream. I tried to use 4096000 bytes(close to the maximum IIS allowed), then the inputstream cannot get anything, it seems IIS is waiting for all data(4096000) to come from client side before it gives the handler a chance to read from the socket.
public class DeviceDataHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
try
{
Stream inputstream = context.Request.InputStream;
Stream outputstream = context.Response.OutputStream;
/loop forever until exception is thrown
while (true)
{
ProcessData(inputstream, outputstream);
}
}
catch (Exception ex)
{
ZenLog.logError("DeviceConnector exception: " + ex.Message);
}
}
public bool IsReusable
{
get
{
return true;
}
}
}
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[code]....
But I'm getting error
A socket operation was attempted to an unreachable host 208.101.14.59:80
I tried the same url by pasting it on address bar and works fine. When I call my vendor they r saying that there is no any problem from their side. Someone has suggested me that there may be some settings in web.config.
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Dec 20, 2010We have a component that needs to sit in asp.net that creates a listening socket on a well known port.The reason we have the socket is the asp.net need component needs to received events from external services and other technologies weren't quick or flexible enough.We start the socket listening in application_start,and close the socket in application_end. The issue is if we are receiving http requests to the web site, and modify the web.config, the application_start event is called before the application_end is called,so we cannot open the socket (we get an error about duplicate socket being open). We dont have a reference to the original socket in the application_start after the web.config change, so we cannot shut it down from there.
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Jan 31, 2014I write code for sending mail. Its working fine in local at Execution time. After i Hosted into server. it shows the Error.
A socket operation was attempted to an unreachable host [IP]:587
code:
Dim mail As New MailMessage
mail.To.Add("xxx@abc.com")
mail.From = New MailAddress("yyy@gmail.com")
mail.Subject = "Subject"
mail.IsBodyHtml = True
mail.Priority = MailPriority.High
[Code] ....
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Aug 27, 2010i have a datalist .
i used an object datasource to show data in datalist .
and my datalist have two or more repeated columns .
how i can make header for top of each column ?
not for each item and not for each row .just for each column .?
