broadcast

Is there any advantage to using a multicast group to send messages rather than just broadcasting them to a specific port? I understand that when broadcasting, other computers that don't want the messages receive them too, but how much does it affect performance/traffic? Don't the computers that don't care just dump the message immediately? As a side question, does multicast outside the LAN work at all? I will assume you're talking about IP traffic. When you say LAN, I will assume you mean an ethernet topology inside an office building (I will be more specific about topologies below). Multicast

I am trying to UDP broadcast from a Python program to two LabView programs. I cannot seem to get the broadcast to send and I am not sure where my socket initialization is wrong, broadcasting seems simple enough?? As far as I can see, there is no data being received by the other PC's. Also, I will need this program to receive data back from the other PC's in the future. It seems like that shouldn't complicate things but every step of the way has been complicated for me! Background: I have zero software experience, this is just something I was assigned at work. Any help is appreciated. Code is

I have the following code which sends a udp packet that is broadcasted in the subnet. from socket import * s=socket(AF_INET, SOCK_DGRAM) s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1) s.sendto('this is testing',('255.255.255.255',12345)) The following code is for receiving the broadcast packet. from socket import * s=socket(AF_INET, SOCK_DGRAM) s.bind(('172.30.102.141',12345)) m=s.recvfrom(1024) print m[0] The problem is that its not receiving any broadcast packet. However, it is successfully receiving normal udp packets sent to that port. My machine was obviously receiving the broadcast packet,

I want to broadcast data from one device using Bluetooth to numerous nearby devices. Now, I know Bluetooth broadcasting exists, but is it possible using Android's existing API? If not, are there any other 3rd party APIs available out there which are capable of it? Another question regarding Bluetooth broadcasting: Can you start listening to an ongoing broadcast and receive data from it, even if you weren't listening since the broadcast has started? For example, let device A be the broadcaster, and he broadcasts the following data over the course of 5 seconds: 1 2 3 4 5 6 7 8 9 10 Device B

I'm looking at the possibility to broadcast over a Wi-Fi Direct connection between multiple Android devices. I've created a simple message broadcasting application to test whether or not it works, but so far I haven't been able to broadcast a message. When I try to send the packet I get a SocketException (Network is unreachable): 03-20 13:23:00.148: E/UdpBroadcaster(4180): sendto failed: ENETUNREACH (Network is unreachable) 03-20 13:23:00.148: E/UdpBroadcaster(4180): java.net.SocketException: sendto failed: ENETUNREACH (Network is unreachable) 03-20 13:23:00.148: E/UdpBroadcaster(4180): at

I was wondering two things, in the context of angularJS event handling. How is defined the order in which handlers listening to the same event are triggered? Is it a sign of a bad design if you start wondering about this? After reading documentation on angular $on, $broadcast and $emit as well as native DOM event flow I think I understand in which order event handlers will be trigger in different scopes. The problem is when several handlers listen in the same scope ($rootScope for example) from various places (Controllers vs Services for example). To illustrate the problem I have put together

Challenge: I would like to use SailsJS , and be able to join a room, by means of socket.io, and receive unsolicited messages from this room, not just when one enters or leaves the room but also receive objects. So several clients connect to the server. Afterwards broadcast (initiated from the server) messages/objects to every room and thus everey connected socket in this room. I maybe could just send every connected socket a message, but dearly would like a example on how to do this with SailsJS 0.10, and a elegant method in the SailsJS 0.10 way. I am looking at : https://github.com

Is it possible to send an intent from a service to an Application class? Not Activity? I wouldn't know what activity would be running at a particular time, so I am adding a boolean flag in the activity class that detects the activity and sends the appropriate data based on the broadcast received. If your Service is active, then your Application class is active as well. Otherwise you wouldn't be able to use getApplicationContext() . Although I'm skeptic about a service that runs forever there is a very clean way to make the Service communicate with a certain Activity , should the last one be