1 files changed, 66 insertions, 0 deletions
diff --git a/grc/grc_gnuradio/blks2/tcp.py b/grc/grc_gnuradio/blks2/tcp.py
new file mode 100644
index 000000000..c6739b711
--- /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))