Imported Upstream version 3.2.2

[debian/gnuradio] / grc / grc_gnuradio / blks2 / tcp.py

diff --git a/grc/grc_gnuradio/blks2/tcp.py b/grc/grc_gnuradio/blks2/tcp.py
new file mode 100644 (file)
index 0000000..c6739b7
--- /dev/null
+++ b/grc/grc_gnuradio/blks2/tcp.py
@@ -0,0 +1,66 @@
+#
+# Copyright 2009 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr
+import socket
+import os
+
+def _get_sock_fd(addr, port, server):
+       """
+       Get the file descriptor for the socket.
+       As a client, block on connect, dup the socket descriptor.
+       As a server, block on accept, dup the client descriptor.
+       @param addr the ip address string
+       @param port the tcp port number
+       @param server true for server mode, false for client mode
+       @return the file descriptor number
+       """
+       sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+       if server:
+               sock.bind((addr, port))
+               sock.listen(1)
+               clientsock, address = sock.accept()
+               return os.dup(clientsock.fileno())
+       else:
+               sock.connect((addr, port))
+               return os.dup(sock.fileno())
+
+class tcp_source(gr.hier_block2):
+       def __init__(self, itemsize, addr, port, server=True):
+               #init hier block
+               gr.hier_block2.__init__(
+                       self, 'tcp_source',
+                       gr.io_signature(0, 0, 0),
+                       gr.io_signature(1, 1, itemsize),
+               )
+               fd = _get_sock_fd(addr, port, server)
+               self.connect(gr.file_descriptor_source(itemsize, fd), self)
+
+class tcp_sink(gr.hier_block2):
+       def __init__(self, itemsize, addr, port, server=False):
+               #init hier block
+               gr.hier_block2.__init__(
+                       self, 'tcp_sink',
+                       gr.io_signature(1, 1, itemsize),
+                       gr.io_signature(0, 0, 0),
+               )
+               fd = _get_sock_fd(addr, port, server)
+               self.connect(self, gr.file_descriptor_sink(itemsize, fd))