I have reworked gr_udp_{sink,source} to do the following:* Make them work on Cygwin and MinGW (tested on Debian/lenny) * Simplify usage: there is no need to specify the local host and port in gr_udp_sink, since no one ever sends anything to it; the "src" and "dst" designations on the host and port have been removed in the code and in the examples * Add flexibility: get_port() in udp_source retrieves the port number, which can be system-assigned; disconnect() and connect() in udp_sink allow the destination address to be changed (e.g., to point to a socket opened by a new client) * Add EOF handling: udp_sink will send zero-length packets when disconnecting; udp_source interprets zero-length packets as EOF and shuts down the top_block gracefully; EOF handling can be disabled independently on sink and source * Add testing: a test case has been added to gnuradio-core/src/tests * Fix miscellaneous problems: udp_source will wait for input, checking for top_block.stop() without blocking; udp_sink ignores ECONNREFUSED errors (allowing it to send quietly until a receiver is ready) * Improved portability: system-dependent handling of errors has been encapsulated in two short functions; select() has been used instead of RCV_TIMEO (to make it work on Cygwin); newer getaddrinfo() replaces several older functions Outstanding issues: * Two parameters (src_host and src_port) have been removed from the call to gr.udp_sink(). Will this be a big problem? Is there a way to effectively provide overloaded function definitions (in Python)? Is it worth it? The new code can be found at http://github.com/don2387ward/gnuradio-dward in branch udp. Comments are welcome. -- Don W. _______________________________________________ Patch-gnuradio mailing list Patch-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/patch-gnuradio
