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Great Reads

Send and receive messages in a LAN with broadcasting

by Orekaria

Lightweight .Net library for UDP LAN broadcasting.

A Remote Pump Monitor over WiFi

by honey the codewitch

Explore an Arduino based IoT web server and UDP multicaster for monitoring a remote water pump

Python's Hand in Redirecting Command Output Over the Network

by Zehaie M. Hailu

Python lends itself to the development of multi-threaded GUI and network applications.

IDTP, An Innovative Communication Protocol

by Huang Geng Geng

If you are looking for a tool

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In-Depth Network Programming in C++

by Mirzakhmet Syzdykov

Network programming in C++

A Method for Transmitting Uncompressed 44.1kHz 32bit I2S Audio from Arduino MKR WiFi 1010

by hemanthk119

This article describes modification of Arduino NINA firmware to wirelessly transmit I2S microphone data.

QUDP - A Reliable UDP Protocol

by Mark Beharrell

A queue based UDP protocol

A Remote Pump Monitor over WiFi

by honey the codewitch

Explore an Arduino based IoT web server and UDP multicaster for monitoring a remote water pump

All Articles

UDP

(ask) Port unreachable

5 May 2013 by evanharijanto

hello everyone, I'd like to ask why is this error occurs.I am trying to get a string data from a device. I have make this code and it runs well when I try to obtain data from a local server, but it stated this error when it connects to the device.java.net.PortUnreachableException: ICMP...

.NET C# SNMP UDP Socket Bug

22 Jul 2014 by nitrous_007

Please help with this problem be patient and read through to the end. I will really appreciate it!!!I am creating 4 sockets on a computer with 4 network adapters and binding each socket to 1 network adapter. Network Adapter 1 is at 192.168.100.10. Socket 1 binds to Network Adapter...

.NET C# SNMP UDP Socket Bug

22 Aug 2014 by nitrous_007

Nice article which might answer some of my questionshttp://msdn.microsoft.com/en-us/magazine/cc163648.aspx[^]In my code I am using syrnchronous ReceiveFrom function instead of the asyncronous BeginReceiveFrom. Is there any problem using the syncronous version as I am sending some data and...

.NET C# SNMP UDP Socket Bug

28 Aug 2015 by nitrous_007

The solution turned out to be fixing the routes on the Test PC to make sure all the IP's were talking to correct network interfaces.

.Net UDP Socket listener missing VPN traffic

20 Dec 2012 by pokemonjohn

HiI have a UDP Listener running as a service on a server written in .Net which has been working fine, but now my client is using a VPN connection to the server as well.It seems that the UDP listener is not detecting any traffic from the VPN connectionI've tried binding it to...

.Net UDP Socket listener missing VPN traffic

7 Jan 2013 by pokemonjohn

I found out it was how a 3rd party was passing through the data to the VPN - once they changed a setting it all worked again !

[C#] Own protocol communication

6 Feb 2011 by pegaz9

Hi, i am from Poland and i am not fluent English.I am writting M.A thesis. Supervisor want that i programmed protocol communication but i doesnt know how to do it. It protocol should be do/has:- used socket(UDP protocol)- consisted of package, for example: init, bye ping, message,...

[C#] Own protocol communication

6 Feb 2011 by #realJSOP

You picked a programming project for your thesis, and you don't even LIKE programming? Beyond that, writing a thesis involves YOUR OWN research, not ours. research it, LEARN how to do it, and then write your thesis.

[C#] Own protocol communication

6 Feb 2011 by Espen Harlinn

You could do worse than starting out reading this book:http://www.cs.wustl.edu/~schmidt/POSA/POSA2/[^]It will not give you the answer, but it will enable you to understand how these things are usually done. Since you are writing a thesis, I would guess that you will have to understand the...

[Repost] how can i send an object over udp ?

27 Oct 2013 by kleymanx90

hi,i have two packet Classes ,1- CommandPacket: class CommandPacket { /** @var CommandPacketHeader */ private $header; private $data;}and 2- CommandPacketHeader :class CommandPacketHeader { /** @var integer Cardinal */ private...

[Repost] how can i send an object over udp ?

27 Oct 2013 by Richard MacCutchan

You already posted this at http://www.codeproject.com/Messages/4688029/how-can-i-split-an-object-into-chunks-and-send-the.aspx[^]. Please read the guidelines and use one forum only.

[SOLVED]receive data via UDP port and display it

2 May 2013 by evanharijanto

Hi all, I'd like to ask a question.I would like to receive a data from an UDP port and display the data as string.here is my trial code, but it doesn't works.it is stated in the error message that it can't bind and also stated socket.bind(native method)I am still don't understand...

[SOLVED]receive data via UDP port and display it

2 May 2013 by AlphaDeltaTheta

Well, your code is absolutely correct there is no issues with it.You are encountering a bind exception. Such exceptions occur if the underlying operating system is unable to create an socket at the specified port. It might be for the following reasons:1. The port 53 is already in use. In...

[SOLVED]receive data via UDP port and display it

2 May 2013 by AlphaDeltaTheta

Well, your has no issues with it. Except for the thing that the constructor used to create a datagram socket for receiving must not include the ip address. It should be like thisDatagramPacket p = new DatagramPacket(buffer, buffer.length);You are encountering a bind exception. Such...

[SOLVED]receive data via UDP port and display it

2 May 2013 by evanharijanto

solved!! thanks everyone!!here is the code I have made after some confusing period.import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;import java.net.SocketException;public class udp_test{ public static void...

A Method for Transmitting Uncompressed 44.1kHz 32bit I2S Audio from Arduino MKR WiFi 1010

17 Oct 2022 by hemanthk119

This article describes modification of Arduino NINA firmware to wirelessly transmit I2S microphone data.

A Remote Pump Monitor over WiFi

5 Nov 2020 by honey the codewitch

Explore an Arduino based IoT web server and UDP multicaster for monitoring a remote water pump

A Simple UDP Messaging Client Toolkit

15 Oct 2010 by Andre Trollip

A simple set of classes to make creating Peer to Peer messaging easy using UDP. Features built-in message concatenation and delivery receipts for reliable transmission.

Android UDP DatagramSocket usage

16 Sep 2013 by Member 9378296

I am trying to port an application from Windows to Android that uses datagramsockets for communication. (C# to Java)In the windows world, I created a messagereceived event listener that is automatically called when a UDP packet is received. The program continues to process data while it is...

array string into datagram packet in android

7 Aug 2015 by suraty

Hello,How can I send a String array via Datagram packets?I can send a string, But how can I send an array? How can I receive it?

ASPX Server Page Talk to Application Server via UDPClient

4 Apr 2011 by Member 3151821

Hi, All,I have an existing UDP Server Application that accepts incoming UDP packets and sends out UDP packets. The application is written in C++.I am now developting a new web site that wants to talk to the existing Server Application. So I am using UDPClient to send and receive packets...

Assigning static/same IP address to the Server everytime it logs in

4 Apr 2013 by Sandeep Mewara

Another homework question of the day? Same post by another member in 2 min: IP address assignment to server[^]It does not work like this here.Here is what is expected of enquirers:1. TRY first what you want to do! You may find that it's not that hard.2. Formulate what was done by you...

astrisk UDP Connection blocks.

30 Jul 2013 by sugin.se

am Working with Asterisk Client softphone Design, Am using Asterisk as PBX Server, users are registered and configured to connect by UDP .But Server or client Blocks UDP connection. UDP connects via port 5060. I connects my designed softphone in this port and sends data. But i wont recieve...

asynchronous udp server client application

16 Apr 2013 by Aayman Khalid

am trying to make an asynchronous udp chat application currently havung only one client and server.the problem is that when I run my server it displays a lot of redundant data and afterward whwn some text is typed displays the error"Error sending the file! \n"... Could someone please look at the...

Binding 40 Sockets to 40 different IP addresses

12 Apr 2013 by ayesha hassan

I am working on udp server/client application. I want my single server to handle 40 clients at a time. For this, I want to create 40 dedicated threads, each dedicated for one single client. Since there are 40 threads one for each client, I want to create 40 dedicated sockets as well. But the...

Binding 40 Sockets to 40 different IP addresses

12 Apr 2013 by jsolutions_uk

If you want a multi client server (who wouldn't?) you shouldn't need to listen on 40 different sockets, but rather a single socket. On recieving a connection, spawn a thread to handle the connection... or a process if you want to go old school :)In fact here's a good example Beginning...

Binding 40 Sockets to 40 different IP addresses

12 Apr 2013 by Manfred Rudolf Bihy

You're trying this the wrong way round. The server should have one socket (IP-adress and port) on which it accepts connections and then it will spawn a separate thread for each client that connects. If you were to do it your way you'd need either 40 IP adresses and listening on one designated...

Blocking sockets v/s non-blocking sockets in multi-threaded single server multiple client application.

12 May 2013 by ayesha hassan

I had been working on a Server Client aplication where Server is going to service(sendto + receivefrom)'x' number of Clients at a time. For this purpose, I have created 'x' number of threads on Server side so that each thread is dadicated to one single client. Inside each thread there is a...

Blocking sockets v/s non-blocking sockets in multi-threaded single server multiple client application.

12 May 2013 by Sergey Alexandrovich Kryukov

I think that using threads with blocking sockets instead of asynchronous API is much better. In most cases, communication is sequential in its nature and the flow of operations is logically independent from other threads. Therefore, using a separate thread for each communication channel (in case...

C# check client before sending data via UDP

2 Jul 2015 by Jak Vo

Hello all!I'm writing small app for sending text data via udp. On server side i have one async UDP socket for sending and receiving data. On client side i have same async UDP socket. When the client sends data to the server, then immediately exit the application without waiting for a...

C# check client before sending data via UDP

2 Jul 2015 by Dave Kreskowiak

Why are you even using UDP? From what you describe, you cannot lose data.UDP doesn't guarantee the data gets to the destination and doesn't even guarantee the packets show up in the correct order!What you describe requires TCP, not UDP.UDP is used to broadcast connectionless data...

C# inefficient streaming to the hard disk

10 Jan 2012 by GabeA

I am currently working on a program that receives UDP packets of size 1460 bytes per packet and continuously streams the bytes to the hard drive of my PC. Currently, my program can only receive and stream 84 packets before data loss occurs. I need my program to be realtime with a fast sampling...

C# inefficient streaming to the hard disk

10 Jan 2012 by Richard MacCutchan

Why are you messing about with the data in this way? You receive a stream of bytes from the network so all you need to do is write that stream (whatever length you receive) to the disk. Don't try converting to a string (what does that achieve?) and don't write four bytes as an int.

C# inefficient streaming to the hard disk

10 Jan 2012 by CodyDaemon

I few things which should help on the speed front...Open the file and keep it open, and just write data to it as it comes in, and then close the file when the program exits. Open and closing files for each packet is just overhead which can easily removed.Why are you writing each 'int' by...

C# Sending data using UDP and TCP protocols can cause malfunction of hardware?

30 Nov 2014 by Member 11273665

I made an application for remote control a pc specifically for control the strategy game Age of Empires 3 (so I can control two civs using one pc). The application uses UDP protocol to send the captured image (I inject a dll to the age3.exe proccess and I hook the DirectX EndScene function so...

C# Sending data using UDP and TCP protocols can cause malfunction of hardware?

30 Nov 2014 by Dave Kreskowiak

Can it cause your hardware to fail? Nope.This sounds like an ISP problem or at most bad hardware and it's just a coincidence that your app happens to be running.

C# socket net directed broadcast

29 Jul 2013 by Klockness

I have several LANs(10.0.0.x) connected to a WAN(192.168.1.x). Each through a router that allows a network drirected broadcast. This is to allow the devices in the LANs to be discovered by devices on the WAN. I can send a broadcast on the LAN(10.0.0.255) and receive it on my socket. But when I...

C# socket net directed broadcast

29 Jul 2013 by freakyit

hi,just an idea:do you have activated port forwording to your ip-address ?greetz

C# Socket that receives broadcast packets

7 Jun 2012 by Geno Carman

I create a socket and bind it to a unicast address. However, it reads packets sent to the broadcast address and I do not understand why.IPAddress ip;IPAddress.TryParse("X.X.X.99", out ip);Socket receiver = new Socket(AddressFamily.InterNetwork, SocketType.Dgram,...

C# Socket that receives broadcast packets

8 Jun 2012 by Geno Carman

This is broadcast, not multicast. the x.x.x.255 is a broadcast address.

C# UDP broadcast binding

22 Sep 2013 by radnix

Hi,I performed the Microsoft Udp examples successfully at :http://msdn.microsoft.com/en-us/library/tst0kwb1.aspxNeither of these two applications use "Bind".My application throws an error if I do not use Bind:ERROR: "You must call the Bind method before performing this...

C# UDP broadcast binding

22 Sep 2013 by Homero Rivera

On the second line of code you do not asign int.Parse to UdpRxPort. Not sure if that is the solution to your problem or just an error when pasting your code. int.Parse will not fail even when it is not assigned to any variable at all (since it can be used in a logical statement).

C# UDP broadcast binding

22 Sep 2013 by radnix

string addrStr = comboBoxIPaddress.Text.Substring(0, comboBoxIPaddress.Text.IndexOf(".")); //-here, we've taken the first digits up until the dot '.' // from the addr : ###.###.###.### is now first ### ex. 192.168.1.25 = 192 or 233.200.132.92 = 233 //- this will tell us if we are broadcast...

C# UDP broadcast binding

22 Sep 2013 by radnix

This is the Microsoft tutorial. Notice it does not use "Bind" (and runs fine on the same PC)UDP Listener:using System;using System.Net;using System.Net.Sockets;using System.Text;public class UDPListener { private const int listenPort = 11000; private static void...

C# UDP broadcast binding

23 Sep 2013 by radnix

OK, found a really great explination at:http://codeidol.com/community/dotnet/a-simple-udp-application/10474/[^]For connectionless communications, you must specify the Dgram SocketType, along with the Udp ProtocolType. Remember, if your application does not need to receive UDP data on a...

C# udp packet based on a structure

8 Mar 2017 by Member 13046160

HelloI want to send a data to the printer via udp port. I have a structure of that udp packet but have no idea how to build it.The structureDoes anyone have an idea?What I have tried:UdpClient udpClient = new UdpClient(); udpClient.Connect("192.168.0.99",...

C# udp packet based on a structure

8 Mar 2017 by Jochen Arndt

Create a C# structure that corresponds to the structure definition. This structure must not contain padding bytes (Pack = 1) and use members with fixed width (use byte, UInt16, UInt32 according to the length of the fields). See StructLayoutAttribute.Pack Field...

C#/.NET Network File System (NFS) Server

3 Jan 2012 by PeteBarber

A basic implementation of an NFS server in C#.

C++ lost UDP packets that in real they are delayed

8 Jan 2018 by saide_a

I have a UDP connection that connects an echo server with a test client. test client continuously sends packets and waits about a second for receiving them. if it can't get the packet, assumes that packet is lost and sends another packet. Most of the packets are sent and received successfully...

C++ lost UDP packets that in real they are delayed

8 Jan 2018 by Jochen Arndt

When using localhost (loopback), there should be no packets lost and no significant delay. So the problem may be sourced by your implementation (probably the server code that handles receiving). Network receiving code should be event driven running in an own thread. Then it can react...

C++ lost UDP packets that in real they are delayed

8 Jan 2018 by KarstenK

As all wrote the use of TCP is in that case better. Another solution is to use UDP packets with a time stamp or counter in the payload, so you check which packets are to drop.

Calling a function when UDP data recieved.

20 Nov 2018 by Engr.Shah

Hi there, still not mature in c# programming, i have written an application in which it receives data from arduino using UDP protocol, when i click a button data is sent and received without hurdle, but i want my application to receive data automatically when arduino sends it. so that i wont...

Calling a function when UDP data recieved.

20 Nov 2018 by Afzaal Ahmad Zeeshan

You need to attach the async callback1, that receives the data for your socket, on its behalf and then alerts you that data has been received. You cannot attach a receive function, as it might be blocking. You can argue, that, // Your receive call is useless as well, and so would be this, ...

Can not communicate with UDP service in local network after windows update

14 Nov 2011 by hoernchenmeister

Hello world,I am currently facing an ugly problem after our admin installed windows updates.We have a service running on a server in our local network.It registers itself on startup in a database, writing its ip and the number of a dynamically assigned port for UDP communication.Clients...

Can not communicate with UDP service in local network after windows update

15 Nov 2011 by hoernchenmeister

Unfortunately our admin installed a virtual network adapter (Oracle Virtual Box) on all the Win 7 64bit machines together with the updates... So it wasn't obvious to spot the problem right away... Disabling the virtual network adapter did the job and everything started to work again.

Can only read one temperature reading from the processor of the sensor, for other sensors it does not work

18 Sep 2019 by Member 14589606

Only one reading can be taken from a sensor at a time. I used the concept of asynchronous sockets, that is, it is only reading the processor temperature of a single sensor at a time. When you add more, it shows that there is an error. Any ideas would be appreciated. After executing the jobs,...

Can only read one temperature reading from the processor of the sensor, for other sensors it does not work

18 Sep 2019 by OriginalGriff

Quote: The object reference was not set to an object instance This is one of the most common problems we get asked, and it's also the one we are least equipped to answer, but you are most equipped to answer yourself. Let me just explain what the error means: You have tried to use a variable,...

Can only read one temperature reading from the processor of the sensor, for other sensors it does not work

18 Sep 2019 by Patrice T

Quote: Can only read one temperature reading from the processor of the sensor, for other sensors it does not work The usage of try/catch in your code prevent the program from telling you where the problem arise, and this is an important information. A try/catch is used to hide an error that you...

Cannot evaluate expression because a native frame is on top of the call stack

18 Apr 2019 by danger moose

Im trying to run a WCF service self hosted on visual studio that is able to send and recieve udp messages. The send works fine but I cant verify it using the recieve. What I have tried: Ive tried to recieve both from the same service and from an outside source on a different port but on the...

Cannot evaluate expression because a native frame is on top of the call stack

18 Apr 2019 by Gerry Schmitz

WCF Test Client (WcfTestClient.exe) | Microsoft Docs[^]

Chances of data collision when using single udp socket for send() and receive()?

30 Apr 2013 by ayesha hassan

I have developed a udp application in which a single server is able to handle 'x' number of clients. Inside my server, there is a primary thread keeps on receiving requests/data continuously from the clients and keeps saving the information of each client in a list.As soon as a request comes...

Chances of data collision when using single udp socket for send() and receive()?

30 Apr 2013 by skydger

It depends on how much clients do you expect and how large messages will be sent.The issue is that UDP does not guarantee delivery of data by itself, so some packets could be dropped.http://technet.microsoft.com/en-us/library/cc785220(v=ws.10).aspx[^]Simultaneous data sending both by...

Communication Patterns for the Internet of Things

20 Jun 2016 by Intel

Before you embark on a new Internet of Things project, you should consider which communication patterns are best suited to it.

machine-learning

Connect client to server

10 May 2022 by Âu Quang Vũ

How can i connect client to server by using udp socket with java swing What I have tried: i dont know, ill tried but its only gonna get worse

Connect client to server

10 May 2022 by Richard MacCutchan

Study the tutorials: Lesson: All About Sockets (The Java™ Tutorials > Custom Networking)[^]

Converting TCP client server to UDP

9 Nov 2010 by David Knechtges

Not exactly certain of your questions, but I will answer given my use of the UDP protocol in my apps.I have a server and many clients on a LAN that use UDP for comms. The server broadcasts data to the clients every so often, and the clients also broadcast data to the server every so often....

Converting TCP client server to UDP

9 Nov 2010 by hazem12

Hello all.I have a TCP/IP multithreading server /client application. i want to convert it to UDP protocol for testing performance issues.I have a question :As i found on UDP server i have one socket that send and recive data by using sendto and recivefrom but on TCP/ip you have a...

CPU Usage 100% when creating 3 threads and using WSAWaitForMultipleEvents() and WSAEnumNetworkEvents()

7 May 2013 by ayesha hassan

I have created 3 threads each thread has one socket each. Inside each thread, socket is made "Event Driven" and whenever data becomes available for reading, an event is generated.The code works fine but it takes CPU Usage upto 100% which is surely undesirable. I think I have made some...

multi-threading

CPU Usage 100% when creating 3 threads and using WSAWaitForMultipleEvents() and WSAEnumNetworkEvents()

7 May 2013 by KarstenK

i guess your threads are blocking the network api.why arent you making some outout or use your debugger...

multi-threading

CPU Usage 100% when creating 3 threads and using WSAWaitForMultipleEvents() and WSAEnumNetworkEvents()

7 May 2013 by Jochen Arndt

Did you report errors and terminate the thread when a function call fails?There is at least one wrong call that should result in an error return (best case) or undefined behaviour (worst case):WSAWaitForMultipleEvents(2, &hEvent, FALSE, WSA_INFINITE, FALSE);You are passing 2 for the...

multi-threading

Create UDP Streamer in Visual C++

14 Apr 2012 by Member 8416408

How to create a streamer in a Windows Console Application that outputs a struct on a specific port(lets say 1234)? I already have a working code in C# that uses UDPClient Class to listen to this stream.

Create UDP Streamer in Visual C++

14 Apr 2012 by Richard MacCutchan

Google for "C++ sockets" there are plenty of samples available.

Creating a socket based chat application in php

22 Sep 2015 by neethujayan

Please help me to find solutionSERVER SIDE CODE Name :

Creating a socket based chat application in php

25 Sep 2015 by ChauhanAjay

Kindly go through the following articleChat Application in PHP[^]Hope the above link helps.

creating two sockets at udp server at a time, how to bind()?

29 Mar 2013 by ayesha hassan

I want two functionalities to be implemented on my udp server application. 1. Creating thread that continuously receives data coming from any client. 2. Creating a thread that continuously sends data on server socket after specific time period and waits for reply from client. (I implemented this...

Data loss in receiving and writing big data using UDP and fprintf

29 Jun 2015 by Member 11499804

HelloMy program receives data from UDP (a packet of 414 byte data at a time, 400 times/sec)and writes the received data (414 bytes) into a text file using fprintf()and writes part of the data into image files using fprintf().In a threaded function, the UDP communication and file...

Data transfer via UDP in C# on Android

10 Dec 2013 by Member 10318167

Anybody got a working solution for sending and receiving data via UDP on Android using C#/Mono?I have a working UDP send/receive system on Windows Phone based on UdpAnySourceMulticastClient, but this is not supported in Mono. Forum trawling has led me to UdpClient, but I have not found any...

difference between Wireshark and application-level UDP read

21 Jul 2015 by Member 11499804

Hello, I don't have much knowledge on communication protocols and I'm confused with: I observed that Wireshark capture is more robust (?) than C-application with CSocket (ReceiveFrom()) to receive UDP data.What factors make the difference? Is Wireshark doing some low-level tasks?Can...

difference between Wireshark and application-level UDP read

21 Jul 2015 by Kornfeld Eliyahu Peter

Wireshark is an open-source tool, so you can get its code and learn it to understand, how exactly the goals are fulfilled...https://www.wireshark.org/[^]

difference between Wireshark and application-level UDP read

21 Jul 2015 by User 59241

You have probably realised that you are starting to go around in circles. Wireshark uses pcap https://en.wikipedia.org/wiki/Pcap[^] which is a very low level packet sniffing API. It accesses the hardware directly and bypasses the TCP stack altogether. This makes it useful for diagnosing network...

difference between Wireshark and application-level UDP read

23 Jul 2015 by Albert Holguin

Quote:I observed that Wireshark capture is more robust (?) than C-application with CSocket (ReceiveFrom()) to receive UDP data.Not more robust. If implemented correctly, your application should get every single packet wireshark gets.Quote:What factors make the difference? Is Wireshark...

Efficient way of validating UDP communication protocol having single Server and multiple Clients

30 May 2013 by ayesha hassan

I have developed a single Server/multiple Clients udp application, where Server can handle x number of clients at a time. The Server has x number of threads each thread dedicated to one Client.The code works perfectly fine. Now I want to check my application for all possible scenarios i.e....

Error no such file or directory

2 Nov 2022 by CarlyJeps

Hello how can i fixes this error [Error] SFML/Network.hpp: No such file or directory The code: #include #include #include #include #include static bool port_is_open(const...

Error no such file or directory

2 Nov 2022 by Richard MacCutchan

The message is clear, the compiler cannot find that file or directory. Assuming this is some third-party header, you need to provide the full path, or add its location to the compiler search path.

Error no such file or directory

2 Nov 2022 by k5054

If the SFML code is in the current directory, then use #include "SFML/Network.hpp" When you use #include the compile only searches the System directories (e.g. /usr/include, /usr/local/include, some others specific to the compiler) and...

Error no such file or directory

2 Nov 2022 by Rick York

Richard is correct. It is important to understand the difference between using angle brackets () and quotes with include directives. The quotes will look for files in the local directory first, which is where the source file is, and then in...

Faster data receive and save in UDP communication

1 Apr 2015 by Member 11499804

HelloI want to ask some advice regarding my program.It is supposed to receive data packets, each with a size of 400 bytes. Transmit speed is 414 packets per second.But the stored data in ptr_logFile_hex (text file) omits some of data as1, 3, 5, 8, 10, ... (when packet number...

Faster data receive and save in UDP communication

1 Apr 2015 by Richard MacCutchan

You should not use UDP for such an application, unless you include your own message checking. UDP[^] is not reliable, as messages can appear in any order and are not guaranteed to be delivered. If the data is important then you should be using TCP.

File transfer 1Mb and above Over TCP/IP or UDP

3 Jan 2014 by sharathkumar27

Issue With Below code is I'm unable to transfer whole file. If the file size 35kb. It'll only transfer 10 kb or 5 kb only. For Client Im using class FTClientCode { public static string curMsg = "Idle"; public static void SendFile(string...

File transfer 1Mb and above Over TCP/IP or UDP

3 Jan 2014 by Rob Philpott

I think this line is the problem:int receivedBytesLen = clientSock.Receive(clientData);In that I think you are expecting to receive the whole data sent in this single call. It doesn't work like that (I've been caught out myself with this). This will return the data in chunks as it is...

Find TcpServer in Network

4 Sep 2014 by m.bleimuth

Hi experts,whats the best way to let a tcp client connect to an unknown tcp Server. That means i have multiple Clients in my Network and multiple Servers application, now i want that all Clients connect automatically to one of the servers. First i tried using UDP and broadcast the server...

Find TcpServer in Network

4 Sep 2014 by DaveAuld

One option would be to make the clients go into a listen - sleep - wake - try port - listen cycle. Each client would wake up, try to bind to the udp port, if it fails (due to the port already being in use) go back to sleep again for a random duration. If it is able to bind to the port then...

Firewall stops c# application with udp socet

20 Feb 2016 by Andy_N

Is is a small app with UDP & dataGridView.While first start Firewall ask confirmation for UDP and Form of app is white (w/o dataGridView). After that happens nothing. I have to close & start again and then works all properly.Thanks for help.AndyWhat I have tried:UDP Listener...

Firewall stops c# application with udp socet

20 Feb 2016 by Maciej Los

I'd suggest to read this: Open a port in Windows Firewall - Windows Help[^]. If it won't help, you should provide more details, as Richard and Caroline have mentioned in the comments to your question.

Fragmenting large data into small packets using C

4 Apr 2018 by Balaraj Nayak

How to fragments large data into small packets. since i am beginner i am unable achieve it, SOMEBODY HELP TO FRAGMENT LARGE DATA INTO SMALL PACKETS . say i have 22kb of jpeg file i want it to devide into small packets with 960 bytes of each. for jpeg there will be STARTING two bits and ENDING...

Fragmenting large data into small packets using C

4 Apr 2018 by Jochen Arndt

Your code will not work because the image data might contain the JPEG markers too (here: the FF D9 end of image marker). So you have to write a parser that gets also the segment length for all non stand alone markers. When such a segment is processed, pass all bytes of the length without...

Fragmenting large data into small packets using C

4 Apr 2018 by KarstenK

For sending over the network the splitting of the binary data is enough. If you want smaller jpeg than you must use higher compression or split the decompressed picture in sub pictures and than compress. The article CXImage shows these techniques.

Getting remote IP of a UDP packet without Endreceive command

13 May 2010 by kivanc.imer

Hello, I am trying to use connectionless async UDP listener.I need to get Remote Endpoint to use in processes and i can get remote Endpoint info with udpClient.EndReceive(ar, IP_Remote_End) command.But as you can see I am stopping the listener for a few milisecs.I lost a few packets in this...

Getting remote IP of a UDP packet without Endreceive command

10 May 2010 by DaveAuld

I haven't tried this, but;As the BeginReceive is non-blocking, and you have declared udpClient as instance variable, you should be able to access the underlying socket and remote endpoint from;udpClient.Client.RemoteEndpoint

Getting remote IP of a UDP packet without Endreceive command

13 May 2010 by Chris Kolkman

What you need is a "state" class you can pass along. This state class can hold a reference to the EndPoint passed to the UdpClient. I'm not sure how well the example holds up with BeginReceive (especially with calling it again to continue listening) as I've only really used BeginReceiveFrom -...