--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/g23m-fad/tcpip/rnet/rnet_rt/rnet_rt_api_getbufsize.c	Sun Jul 15 04:40:46 2018 +0000
@@ -0,0 +1,73 @@
+/**
+ * @file    rnet_rt_api_getbufsize.c
+ *
+ * RNET_RT API
+ *
+ * @author  Regis Feneon
+ * @version 0.1
+ */
+
+/*
+ * $Id: rnet_rt_api_getbufsize.c,v 1.3 2002/10/30 15:23:34 rf Exp $
+ * $Name: ti_20021030 $
+ *
+ * History:
+ *
+ *  Date        Author        Modification
+ *  --------------------------------------------------
+ *  3/22/2002   Regis Feneon  Create
+ *
+ * (C) Copyright 2002 by TI, All Rights Reserved
+ *
+ */
+
+#include "rnet_cfg.h"
+#ifdef RNET_CFG_REAL_TRANSPORT
+
+#include "rnet_rt_i.h"
+#include "rnet_rt_env.h"
+
+/**
+ * Use to determine the amount of data pending in the network's input buffer
+ * that can be read from the connection ID.
+ *
+ * If desc is stream oriented (TCP), returns the amount of data that can be read
+ * in a single call to the rnet_recv function; this might not be the same as the
+ * total amount of data queued on the socket.
+ * If desc is message oriented (UDP), returns the size of the first datagram
+ * (message) queued on the socket.
+ *
+ * Use the socket option SO_NREAD.
+ *
+ * @param  desc    Connection identifier [IN].
+ * @param  size_p    Pointer to an unsigned int in which the result is stored [OUT].
+ * @return  RNET_NOT_INITIALIZED  NET subsystem not initialized (internal error).
+ *      RNET_INTERNAL_ERR    Network subsystem failed.
+ *      RNET_INVALID_PARAMETER  The connection ID is invalid.
+ *      RNET_NOT_READY      Still processing a callback function.
+ *      RNET_OK          Value successfully get.
+ */
+
+T_RNET_RET rnet_rt_get_buff_size (T_RNET_DESC * desc,
+                 UINT32 * size_p)
+{
+  int err, len, nread;
+
+  len = sizeof( nread);
+
+  /* get number of bytes in receive buffer */
+  rvf_lock_mutex( &rnet_rt_env_ctrl_blk_p->mutex);
+  err = ngSAIOGetOption( (NGsock *) desc, NG_IOCTL_SOCKET, NG_SO_NREAD,
+    &nread, &len);
+  rvf_unlock_mutex( &rnet_rt_env_ctrl_blk_p->mutex);
+
+  if( err == NG_EOK) {
+    *size_p = nread;
+    return( RNET_OK);
+  }
+
+  return( rnet_rt_ngip_error( err));
+}
+
+#endif /* ifdef RNET_CFG_REAL_TRANSPORT */
+