Hi, I'm sure you've seen the "the connection was reset" message displayed when trying to browse web pages. (The text is from Firefox, other browsers differ.) I need to generate that message/error/condition on demand, to test workarounds. So, how do I generate that condition programmatically? (How to generate a TCP RST from PHP -- or...
Hi, when connecting to a web service such as Amazon or Yahoo, I find there is a one or two second delay after the data has been sent and before the service disconnects. I used to program with Perl and solved this by using a regular expression to match the end of the data, then break out of the loop. For example: while ($line = <SOCKET>...
Is it better to use POSIX message queues or Unix domain sockets for local IPC communication? I have worked with Unix sockets between machines (not domain) and I remember that making and breaking the connection would cause sockets to linger awhile before they finally went away. Moreover, if you wanted a "reliable" exchange you either had...
I have a socket connecting to a proxy then to a remote server i specify. However i want multiple connections to the remove server from the proxy. So i want to create 4 sockets to the same proxy and from the 4 sockets connect to the remote server. When i do this it doesn't work, it only connects to the proxy once. Here is psuedo code: ...
Hello I have started to port Android on TCC89XX board, I download Android SDK. and applied the patch with kernel 2.6.29, the Processor is having armv6 instruction set. I am not able to see the network up ifconfig is not able to show the network devices. Also I do not get why there is no "on" binary in the system/bin, system/xbin, the...
I have a QTcpSocket in a seperate thread sending a lot of data. Several of these applications are spread out over the network. How can I detect whether my network is overloaded and my socket is not able to send anything anymore? Will QTcpSocket buffer all data, how can I see the size of my buffered data that is queueing to be sent? Will...
Suppose I have established a connection on a socket and got a Posix error code while sending or receiving a packet: one of those listed at the end of this page. On which errors I should not close the socket because trying to send/receive on the same socket again may work? ...
After reading this answer, I want to understand if the same applies to the calls to gen_tcp:recv(Socket, Length). My understanding of the documentation is that this if more than Length bytes are available in the buffer, they remain there; if there is less than Length bytes, the call blocks until enough is available or connection closes. ...
I am receiving 3144 bytes of data through TCP/IP socket during debug mode, but in excecution 1023 bytes were received. Why isn't the remaining data read? IPEndPoint ipEnd = new IPEndPoint(ipAdd, ipPort); Socket soc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); soc.Connect(ipEnd); byte[] sendData = Encodi...
Im implementing my own proto in Java, it will use a heartbeat over a TCP connection that I also use to transfer messages and files. For the client I am using blocking socket I/O. So here is how Im planning that will work... I will set the socket timeout for K seconds and make the heartbeat stay sending messages in an interval T, so that ...
i am trying to disconnect a client from a server but the server still sees it as being connected. I cant find a solution to this and Shutdown, Disconnect and Close all dont work. Some code for my disconnect from the client and checking on the server: Client: private void btnDisconnect_Click(object sender, EventArgs e) { ...
I am trying to do a Socket.Connect() and when the IP address that i specify is in ipv6 format, the Socket.Connect() fails with the error message : Address family not supported by protocol family. An address incompatible with the requested protocol was used. All sockets are created with an associated address family (that is, AF_INET for ...
So, I have a working protocol that the Client needs to authenticate with user and password to login on the server. Then server and client would trade messages and files. It´s all working OK and I´m using Input/Output Stream for that. I need to add encryption to the conversation and user/password authentication too. I dont want to store a...
I have a rather large library that negotiates communication between a server and clients. The sockets use the kCFSocketDataCallback flag to enable getting data out of the connection. The library has been working very well for a long time. Now i am trying to load it up into a PPC app that runs under rosetta on intel machines. The load goe...
I'm connecting to a remote host as follows: $conn = stream_socket_client("ssl://$host:$port", $e_code, $e_string, 2, STREAM_CLIENT_CONNECT, $ctx); How should I interpret the error code? The docs say the error code "holds the system level error number that occurred in the system-level connect() call." I can't find any PHP constants w...
I have a simple file transfer socket program where one socket sends file data and another socket receives the data and writes to a file I need to send an acknowledgment once transfer is finished from the destination to the source Code for destination s.accept() f = s.makefile() f.read(1024) Code for source s.connect(('localhost',609...
I have written a program that communicates with many servers at once using the asyncore module. For the most part I am just responding to data received from the servers, but occasionally I need to send some data "out-of-sync". With the default timeout of 30 seconds there is an obvious delay before the packet gets sent, so I have lowered ...
I'm trying to use PGM sockets to send data on Windows. I can listen and receive data fine from a PGM socket using a non-admin account, but when I try to create a socket to send data I get an exception at this step: socket.Bind(new IPEndPoint(IPAddress.Any, 0)); The exception is: An attempt was made to access a socket in a way forbidde...
I am trying to use the code written and uploaded by Fedor posted in this thread http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview (Source code: http://open-pim.com/tmp/LazyList.zip) Fedor's project works well, but when I try to adapt the code to my project, things are not running well since...
The 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 ju...