On Jul 12, 2010, at 1:04 PM, Peter Alexander wrote: > On Mon, Jul 12, 2010 at 1:45 PM, Chuck Remes <[email protected]> wrote: >> On Jul 12, 2010, at 12:18 PM, Steven Clark wrote: >> >>> Forgive me a simple/stupid question here- >>> >>> To make use of ZeroMQ, do both ends of a simple network connection >>> need to be programmed with ZeroMQ, or can one endpoint use ZeroMQ and >>> the other use low-level (Berkeley-style) sockets? >>> >>> I have a situation where a device (microcontroller-based) connects >>> periodically to a TCP server, sends/recvs some data, and disconnects. >>> The server sends some filtered form of the data to other network >>> endpoints. Currently everything is written using low-level sockets. >>> I'd like to switch the server to use ZeroMQ so I can take advantage of >>> Publisher/Subscriber sockets, etc for the distribution of data from >>> the server. Should/can I make the link between the device and the >>> server use ZeroMQ, given that I can't exactly port ZeroMQ to run on >>> the microcontroller platform? >>> >>> In the event that I can use it for the device connection, is the PAIR >>> topology the correct one to use? What happens if the device doesn't >>> shut down the connection cleanly (which happens fairly often)? Is >>> there any danger of getting stuck in a FIN_WAIT state? >> >> You can use regular sockets but you need to conform to the 0mq wire protocol. >> >> See: http://api.zeromq.org/zmq_tcp.html >> >> I think you could probably get something working on the microcontroller >> platform for SUB sockets pretty easily. >> > > Correct me if I'm wrong here.. zmq_poll() can also be used. And I > believe Martin is working on making this transparent for the future.
zmq_poll() doesn't help in this situation. He wants to be able to talk to 0mq sockets from a device that does NOT have the 0mq library. To do so, the application logic behind the regular socket will need to "speak" the 0mq wire format. cr _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
