VS 2008 Sending Packets To A IP Address?
Dec 28, 2009Hey 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?
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Sending Raw Packets To WebBrowser Control?
Feb 15, 2009Well 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.
VS 2008 - Sending Emails To Each Address In Database
May 16, 2009I have a simple program that uses this code
Dim sParams as string = ""
Dim emailto as string = TextBox1.Text
Dim subject as string = TextBox2.Text
Dim body as string = TextBox3.Text
sParams = "mailto:" & emailto & "?subject=" & subject & "&body=" & body System.Diagnostics.Process.Start(sParams)
From this thread [URL]
Now I have a table with about 6 email address's in. How would I go about sending emails to each one of these emails in the database using this code. User can also add emails to the database.
Sending Message Using IP Address Over LAN?
Nov 24, 2010How can I send message to each other (computer connected via LAN), using IP address?
View 1 RepliesSending Custom IP Address To Webbrowser Control?
Jan 20, 2010What I am wanting is for randomly generated ip to be sent as the ip address to the webbrowser control instead of the real ip address.So evertime the webbrowser document requests for ip it will send that ip. Attributor 2.0
View 8 RepliesVS 2008 - Handle Packets When It Comes In Parts?
Jul 6, 2011I 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 RepliesVS 2008 - Time Stamps On Sent Packets
Aug 20, 2009Im 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 RepliesVS 2008 Empty Values In Packets Disappear - TCP?
Jun 10, 2010Empty values in byte array at the end of one packet are replaced by beginning values of the next packet sent in TCP connection. How may I avoid this?
View 4 RepliesVS 2008 Socket Application - Transfer Packets From The PC To The Mobile Phone
Nov 2, 2009i try to transfer packets from the PC to the Mobile phone~ my PC is act as a Server and Mobile as a Client. My Mobile is successfully connect to my PC, but when i try to pass a packets from Mobile, it went failed without any error. The Server didn't receive any packets from Mobile. i had test my code on PC to PC and it's work fine. Anyone have this kind of experience?
View 3 RepliesVS 2008 : Use The DHCP API To Retrieve A Computer's MAC Address When Given The IP Address?
Nov 27, 2009I'm trying to use the DHCP API (using the references on pinvoke.net) to retrieve a computer's MAC address when given the IP address but I can't get the code to work. I've run all the C# code on pinvoke.net through the C#-to-VB converter but I'm stuck now.
Here's what I have so far. The value of res is always 5 (should be 0). Thing is, I can't find any documentation on what the return codes mean
vb
Private Sub GetMACDim client As String = "1.1.1.1" Dim server As String = "0.0.0.0" Dim si As New NativeMethods.DHCP_SEARCH_INFO si.SearchType = NativeMethods.DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress si.ClientIpAddress = Convert.ToUInt32(StringIPAddressToUint32(client)) Dim res As UInteger Dim oInfo As IntPtr
[code]....
Validation Domain And Email Address For Sending Email?
Feb 11, 2012how to validation Domain and Email Address for sending email in visual basic 2010 i used Code Below
[code]...
But Get Return abc123@xsd.com is a valid EmailID How is Valid The Domain is Not Valid Then..?
Reading Packets From UDP / IP
May 13, 2009I 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 "?".
Receiving UDP Packets From Different Ip's?
Jun 19, 2009I 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]....
TCP: Differentiate Between Packets?
Oct 3, 2010Does 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
Detect Individual SYN Or FIN Packets?
Mar 16, 2011Can I send and detect individual SYN or FIN packets using VB.NET Sockets or any other process in VB.NET?
View 2 RepliesReceive And Send Packets?
Jul 25, 2009Since 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...
Way To Send Parsed Packets
Mar 8, 2011I 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 Replies.NET Asynchronous Sockets Packets Getting Lost?
Oct 15, 2011I 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 RepliesNot Receiving All Packets - VB Sockets - Async?
Oct 27, 2009Here'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].....
Use Packet X To Capture Packets From A Certain Program That Uses UDP?
Jun 12, 2011I 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 RepliesWhy Is Socket.BeginReceive Losing Packets From UDP
Sep 25, 2010The 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.
IP Address Filter Or Mask To Only Allow Valid IP Address Before Pinging Or Testing For Network Connection
Jul 6, 2011Are there any IP Address filters or masks available in Windows Forms as per following screenshot? A backslash shouldn't be allowed or it should be filtered somehow.
View 1 RepliesUsage Of Each Socket Address (protocol/network Address/port) Is Normally Permitted?
Aug 11, 2009SocketException was Unhandled: Only one usage of each socket address (protocol/network address/port) is normally permitted I get this error every time i click collect a second time.
[Code]...
Obtaining Network Address From Host IP Address And Subnet Mask
Mar 8, 2009Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
View 3 RepliesMake A Packet Sniffer That Will Give SSL Packets
Oct 11, 2010I 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 RepliesSend Separate Packets From Server To Client?
Oct 1, 2009Now i need to send separate packets from the server to the client.For the client I am using usual Tcp but for the server I am using Winsock Control. [code]...
View 5 RepliesVS 2010 Sniff Packets From A Specific Application
Feb 14, 2011I'm trying to sniff packets from a specific application. I searched around but couldn't find anything useful, but I did hear something about WinPcap. What is WinPcap and how do I use it? Also, is there another way to sniff packets?
View 6 RepliesMake The Website Address Show In Browser Address Bar?
Aug 6, 2011I made web browser which consist address bar that I use it to type addressess in it i.ewhen I type [URL] it opens [URL] but when I go to anther page in google it doesnot show it's link in address bar lix InterntExplorer or other international browsers so how to show any link or any sub page's link in my browser address bar ?
View 1 RepliesCommunications :: Could Lost Packets Interfere With Network Operation
Jul 29, 2008At my workplace I have been developing a server/client application which receives on port 8000 and sends on 8001. We do not have any other applications that use these ports, but we do have an application that accesses an SQL database in which part data is stored.
When I am doing testing on the application, if the server were to crash while the client app was sending a packet, could this lost packet cause issues with the network at all?I ask because for some reason we have been receiving connection timeout errors from the application that stores our product data, but we haven't made any changes or started running any new jobs on the network that I am aware of.
Communications :: Used To Assemble And Send Raw Packet / Receive Response Packets?
Sep 14, 2008What Visual Basic code can be used to assemble and send a raw packet, and receive response packets? I looked on MSDN and I couldn't find any documentation for anything used to send a packet.
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