Heyo, I'm using UdpClient to query game servers about server name, map, number of players, etc. I've followed the guidelines on this page (A2S_INFO) http://developer.valvesoftware.com/wiki/Server_queries#Source_servers and I'm getting a correct reply: I have no idea how I would go about to get each chunk of information (server name...
Hello I have 2 boxes: - an embedded device (ARM Omap with linux) which I'll call "Omap". - a PC (can either be Windows or linux). Scenario 1 Both boxes are in the same network (example: my office). The Omap gets its address from a DHCP server (ex: 192.168.10.110). The PC has always the same address (ex. 192.168.10.104). I can succ...
I want to figure out whether my computer is somehow causing a UDP flood that is originating from my network. So that's my underlying problem, and what follows is simply my non-network-person attempt to hypothesize a solution using python. I'm extrapolating from recipe 13.1 ("Passing Messages with Socket Datagrams") from the python cookbo...
Hello, This has been bothering me for awhile, can some one show me how to ping a counter strike server. I just want to ping the server and see if it is online, thats all. I found many small snippets online that were using fsock and UDP to do this but none of them actually did the job i wanted it to do. Most of the ones i found were s...
I know that UDP is inherently unreliable, but when connecting to localhost I would expect the kernel handles the connection differently since everything can be handled internally. So in this special case, is UDP considered a reliable protocol, or will the kernel still potentially junk some packets if buffers are overrun? ...
Hello everyone, I am having an application where I have to send several small data per second through the network using UDP. The application need to send the data in real-time (no waiting). I want to encrypt these data and insure that what I am doing is as secure as possible. Since I am using UDP, there is no way to use SSL/TLS, so I h...
Hi, I have a GTKmm Windows application (built with MinGW) that receives UDP packets (no sending). The socket is native winsock and I use glibmm IOChannel to connect it to the application main loop. The socket is read with recvfrom. My problem is: this setup eats 25% percent CPU time on a 3GHz workstation. Can somebody tell me why? The...
I've been asked to look into adding multicast support to a Java trading system but, to be honest, I don't have the slightest clue what this could be for. Would this mainly be to allow the trading system to broadcast trade messages to different types of clients, say, a mobile phone as well as a server? Why might a trading system need mult...
I have a UDP socket that is bound to INADDR_ANY to listen to packets on all the IPs my server has. I'm sending out replies through the same socket. Right now the server chooses automatically which IP is used as the source IP when packets are sent out, but I would like to be able to set the outgoing source IP myself. Is there any way to...
Hi Does any one have an example for ReceiveFromAsync works with regard to UDP? i couldn't find any sample code. I can find a few TCP sample but msdn say 'The ReceiveFromAsync method is used primarily to receive data on a connectionless socket'. Thanks, Nick ...
I'm not sure how best to approach my problem. I have a service with runs on a remote machine with receives and process UDP packets. I want the service to be able to re-send these packets to anyone that happens to want them (could be no-one, will typically be one machine, but may be more) I figured UDP Multicasting would be ideal - the s...
I'm having a little test program that sends a lot of udp packets between client->server->client (ping/pong test). The packets are fixed size on each run(last run is max allowable size of udp packet) I'm filling the packets with random data except for the beginning of each packet that contains the packet number. So I'm only interested to ...
Hello! I want to send broadcast message to all peers in my local network. Message is a 32 bit integer. I can be sure, that message will not me fragmented, right? There will be two options: - peer will receive whole message at once - peer will not receive message at all Going further, 4 bytes is maximum size of data, that can be sent in...
Hi, In some cases, I'd like to explicitly discard packets waiting on the socket with as little overhead as possible. It seems there's no explicit "drop udp buffer" system call, but maybe I'm wrong? The next best way would be probably to recv the packet to a temporary buffer and just drop it. It seems I can't receive 0 bytes, since man s...
is multi-threading is possible in a simple java server using udp connectionless protocol? pls give an example!! ...
I a very new to Android. I need to make a connection with an UDP server by using my Android UDP client. Now I need to know how to work with UDP in Android? Please guide me to do this. ...
In C++ using Windows32 using windows socket library using UDP is there a way to give a client routing information to another client to establish a connection between clients without having to route through the server Clarification: server - waits for computers and gives routing info - a detached server client - sends a ack request and ...
We have an application that uses two types of socket, a listening UDP socket and an active SCTP socket. At certain time we have scripts running on the same machine that have high IO activities (such as "dd, tar, ..."), most of the time when these IO heavy applications run we seem to have the following problems: The UDP socket closes T...
Hi, I know UDP header incorrect lenght is usually part of security testing as this one could crash the target machine. However, how to do that on your own? ...
on a project I am working on, we are seeing out-of-order issues in certain circumstances on a SMP system when we are reading a UDP stream from the network. We can see it arrives from the network in order by sniffing off a hub connected between the sender and receiver. However sometimes it appears to arrive out of order when read from the...