I am trying to make a program that will stop people on the same network being able to tale if im online by pinging my i.p adress aparantly the only way of doing this is to "drop icmp packets and not reply to them"
dose anyone know how to do this? and can anyone provide me with a basic script that will do this?
Using Vb.net 2003 Sql Server 2005 Asp.net 1.1..If I were to make a forum site and I had alot of visitorsdaily, like 300,000.I also had many categories such as this site.Would it be better to have a Reply table for each category orhave only one Reply table for the whole site.The same for Question table, although the questions would be numerousit would be smaller than the Reply table.Also if anyone has a Database Diagram,or Schema of a large forum I like to take a lookat one have'nt seen any online for a forum.
View 7 RepliesI am trying to create a tool that will test to see if a device is reachable b ICMP and report back with the latency, i.e. send a ping. If possible, I would also like to get the hop count value.[code]I keep getting an error message saying " 'Send' is not a member of 'NetworkTool.Ping' ", but everyone seems to use it. So how do I do get .Send to work?
View 1 RepliesI was trying to figure out if anyone had any example of sending ICMP packets over a Socket, when it is in raw mode?It would need to construct the IP Header information, and the raw ICMP packet.
View 1 RepliesI'm having problems with parsing the XML results that a webservices is sending me. Mostly due to the format this result is sent in. I can succesfully send a request and I get the response back in a string. Now the (truncated) result looks like this:
- <tr>
<td field="fin.trs.line.dim2" hideforuser="false" type="String">01249</td>
<td field="fin.trs.line.openbasevaluesigned" hideforuser="false" type="Value">-100.00</td>
[Code]....
This is where my problem starts. Because I've found various pieces of code that let me take out the nodes I need. So in the above example <Office> and <code> come out perfectly. But the problem appears when reading the other lines because they start with <td SPACE field=> etc etc. When I readout those lines all I get back is TD.
I need to specifically filter the results based on those TR/TD fields. I'm using an XMLreader and xmlnodetype to filter out the results, but maybe I'm using the wrong method.
How do I find an open Reply that I have lost?
View 1 RepliesI receive info requests through email, generated from a web form, which I cant touch, I would, but I can't cos it's an external service. These emails have assigned differents template replies, which I, manually, use to answer them. For this company, this is obvious. For me is a machine work, it¡s totally automatic. So, why don't I set up a rule in Outlook? Because the reply-to address doesn't match with the real one. As it comes from our own server, the reply-to address is our own address.
i just have to answer with different specific templates I already have depending on different fields in the message and send this to an address that is also in one of these message fields. For more data, here is one of the messages I could receive:
[Code]....
I have to set our support email to send an out of office reply between 6pm and 8am every day and then for the entire weekend. I come to find out exchange does not support this. Is it possible to write a "service" that I can load up on a machine that monitor the support email then send an auto reply if it is between 6pm and 8am? Basically it would just be a lite weight email client that only does anything outside of business hours.
View 1 Repliesi have the code below to ping an ip address, it works fine but Is there anyway i can include the reply times in the display or return the ping reply times in any shape or form for that matter ? preferable the average round trip time in ms is what i would like returned along with the ping result. anyone have any ideas or is it even possible to do within vb ?
[code]...
I am developing a vb.net program which shells to SmartRipper to do the actual ripping process and I need the process to run unattended. The problem I've just spent 4 days trying to resolve is to simply respond to a message box that pops up when SmartRipper starts but I'm not having much success at all.
When I try SendKeys.Send("{ENTER}") while debugging the program I get an error "changes are not allowed while code is running or if the option "break all processes when one process breaks is disabled". I don't know why the error message shows but I do have the option enabled as indicated how to eliminate it from showing.
I've been working on this for 4 days and now I'm just spinning my wheels.
' Declares
Private BM_CLICK As Integer = &HF5
Declare Auto Function SendMessage Lib "user32" (ByValhWndAsIntPtr,
[Code]....
I have the following code, and i would like to know how i can show the result i got from the post.
vb Imports System.IO
Imports System.Net
Module Module1
Sub Main()
' Send("http://yahoo.com")
[Code]...
I've an old vb6 ocx in order to show an msgbox with autoreply in n seconds.
rm = waitMsg("can't connect to host...",9,"*Retry","Cancel")
if rm = 2 then exit sub 'cancel
acts in same way of msgbox, but after 9 seconds (in the example) then auto click the Retry button (the default button, the one with * prefix). maybe I could convert this old ocx to net, but wondering if there is not an better alternative using messagebox.
currently i doing a sms service system using vb , can anyone tell me how or what code i can use to make the system auto reply when recieve an sms from a phone no
View 1 RepliesI'm working on a VB.Net application that extracts emails from an Exchange inbox and then does various things with them. I want it to treat out-of-office auto-replies differently to everything else, so I was hoping someone might know how to identify them.
Obviously, I could simply look to see if the message subject starts with "Out of Office:", but that seems a bit sloppy to me. There's clearly a more accurate way to identify them, because in Outlook, an auto-reply has a different icon to a normal email that simply has "Out of Office:" at the beginning of the subject.
I'm using the component Independentsoft.Webdav.Exchange.dll to handle the email side of things, but I couldn't find anything obvious there.
I'm trying to create a program that calls the command prompt, runs a line of text, needs to wait for a specific reply then moves on. Using the sleep command doesn't really apply in this particular situation because I need to wait for either reply A or reply B and move on accordingly. Most of the resources I find on this all refer to the sleep command. Sure there is a way to view a reply in the shell command and if reply A then do the rest...etc.
View 3 RepliesI am writing a program that talks back and forth with an external machine through UDP/IP. I have figured out how to talk to the machine, bu now I need to know how to read the machine's response. I am using the following code:
Dim receiveBytes As [Byte]() = udpClient.Receive(RemoteIpEndPoint)
Dim returnData As String = Encoding.ASCII.GetString(receiveBytes)
TextBox1.Text = returnData
When I break the code down and read receiveBytes, it comes through exactly the way I want it. It is falling apart when it gets encoded and put into a textbox. It just comes out as a "?".
I am trying to receive about 900 packets coming from around 900 different ip's. But for some reason I can't seem to capture them all. The same code in C++ seems to work fine, but when I try to do it and run it through the parser it seems that I only get about 150 - 300 of these packets each time I ask for them.
[Code]....
Does anyone know of a good example of TCP, in C# or VB.NET?
The problem I have with the majority i've found is that they send data once, receive data once, and end. This isn't a workable example. Even MSDN's example does this.
My main question:
Every example reads incoming data into a buffer (byte array), usually 512 bytes. If two packets are received in a row, how do I know where one packet's data ends and another's begins? What if a single packet has more than 512 bytes of data?
All TCP examples i've found work in a rather procedural way.
I'd like to have something as simple as this:
Code:
Public Sub OnPacket(data As Byte())
End Sub
Can I send and detect individual SYN or FIN packets using VB.NET Sockets or any other process in VB.NET?
View 2 RepliesSince a few months I want to learn how to receive and send packets. Since WinSock doesn't work I think it'll be quite hard to get an easy way to do it.
I want to be able to send and get packets as a client. (TCP) I know that I need System.Net.Sockets, and that's quite everything...
I am on a new topic in VB.NET and I am so confused I don't really even know where to start. It is sending Parsed Packets. This packet below is a login server of a game and I want to know how to send it so it automatically does it.[code]....
View 6 RepliesI made a TCP server which communicates with multiple clients at once, but I can't seem to be able to make them stable. When one of the client sends 100 packets to the server, the server receives only a few of them.Here's the client code in PasteBin. It shows how the client connects to the server and then sends 100 messages in a For loop to the server.And here's how the server handles the connection. I couldn't paste the full source as it's hundreds of lines long so let me know if it's missing any mandatory parts and I'll upload them as well.
View 1 RepliesHere's the code on the sending side of my sockets:
Private Sub Send(ByRef Buffer() As Byte)
Dim obj_StateObject As New StateObject
obj_StateObject.WorkSocket = m_tmpSocket
[code].....
Well I need to send a raw packet to a Web Browser Control. The packet is:
"%xt%z%zo%50% . 1000000 . "%""
I need to send it to a flash game but I have no idea how to.
I have been trying to figure out how to use Packet X to Capture Packets from a certain program that uses UDP. Does anyone know how to do so?
View 1 RepliesI have a program which uses TcpClient, the issue I'm having is how do I construct the packets when some of them come in seperate parts. For example, If I receive 5 packets, 2 of them are fine, but the other 3 have come in seperate parts when it's suppose to be a whole packet. How can I handle this?
View 5 RepliesIm sending packets through UDP, and want to get the time it takes for the server to receive the packet from the client. Would the best way be by adding a timestamp to the packet the client sends, and then use that time with the server to calculate the actual time it took to receive?
View 39 RepliesHey there, I thought i would redo my question, How could i send packets in VB to a IP and Port, I'm unsure on how to do this could somebody tell me?
View 4 RepliesThe following code waits for data over UDP. I have a test function that sends 1000 packets (datagrams?) of 500 bytes each. Each time I run the test function, the receiver gets only the first few dozen packets but drops the rest. I looked at the incoming network data using Wireshark and I see all 1000 packets are actually received, but just don't make it to may app's code.[code]If I add a small delay after each call to Send, more packets make it through; however since Wireshark says that they were all received anyways, it seems that the problem is in my receive code. I should mention that UdpListen is running on a separate thread.Any idea why I am dropping packets? I also tried UdpClient. BeginReceive/ EndReceive but had the same problem. A second issue that bothers me is the global nature of the receive buffer when using Sockets and I am not sure if I don't process incoming packets quickly enough that the buffer will be overwritten.
Based on the various, somewhat conflicting suggestions from replies to this and other posts, I made some changes to my code. Thanks to all who chimed in various bits; I now get all my packets from dial-up to Fast Ethernet. As you can see, it was my code at fault and not the fact that UDP drops packets (in fact I have not seen more than a tiny percentage of packets being dropped or out of order since my fixes). Differences:
1) Replaced BeginReceive()/EndReceive() with BeginReceiveFrom()/EndReceiveFrom(). By itself this had no notible effect though.
2) Chaining BeginReceiveFrom() calls instead of waiting for the async handle to set. Not sure if any benefit here.
3) Explicitly set the Socket.ReceiveBufferSize to 500000 which is enough for 1 second worth of my data at Fast Ethernet speed. Turns out this is a different buffer than the one passed to BeginReceiveFrom(). This had the biggest benefit.
4) I also modified my send routine to wait a couple of ms after having sent a certain number of bytes to throttle based on expected bandwidth. This had a big benefit for my receiving code even though Wireshark said all my data still made it across even without this delay.
I did NOT end up using a separate processing thread because, as I understand it, each call to BeginReceiveFrom will invoke my callback on a new worker thread. This means that I can have more than one callback running at the same time. It also means that once I call BeginReceiveFrom I have time to do my stuff (as long as I don't take too long and exaust the available worker threads).[code]What is not shown above is the error handling and dealing with UDP data being out of order or missing.I think this handles my issue, but if anybody still sees anything wrong with the above (or something I could do better) I would love to hear about it.
I need to make a packet sniffer that will give me SSL packets. It doesn't need to give me any other information than the body of the packet, the actual data being sent to me. It does not need to differentiate between different IP addresses. And, it doesn't even need to differentiate between things which are and are not SSL packets. Any packets will be fine, it just needs to support SSL packets. The fewer lines of code the better...
View 5 Replies