stream: Separate TCP/Unix stream helpers from stream/service implementations

This allows us to disable Unix sockets cleanly on Windows. Replaces some
read/write calls with recv/send counterparts, as Winsock does not like
read/writes.

src/libstrongswan/networking/streams/stream_service_unix.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2013 Martin Willi
+ * Copyright (C) 2013 revosec AG
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+/**
+ * @defgroup stream_service_unix stream_service_unix
+ * @{ @ingroup stream
+ */
+
+#ifndef STREAM_SERVICE_UNIX_H_
+#define STREAM_SERVICE_UNIX_H_
+
+/**
+ * Create a service instance for UNIX sockets.
+ *
+ * @param uri		UNIX socket specific URI, must start with "unix://"
+ * @param backlog	size of the backlog queue, as passed to listen()
+ * @return			stream_service instance, NULL on failure
+ */
+stream_service_t *stream_service_create_unix(char *uri, int backlog);
+
+/**
+ * Create a service instance for TCP sockets.
+ *
+ * @param uri		TCP socket specific URI, must start with "tcp://"
+ * @param backlog	size of the backlog queue, as passed to listen()
+ * @return			stream_service instance, NULL on failure
+ */
+stream_service_t *stream_service_create_tcp(char *uri, int backlog);
+
+#endif /** STREAM_SERVICE_UNIX_H_ @}*/