--- libaitrpc/src/blob.c	2011/08/29 23:26:56	1.3.2.1
+++ libaitrpc/src/blob.c	2011/09/07 07:24:21	1.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: blob.c,v 1.3.2.1 2011/08/29 23:26:56 misho Exp $
+* $Id: blob.c,v 1.4 2011/09/07 07:24:21 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -127,6 +127,10 @@ rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t
 		rpc_SetErr(EINVAL, "Error:: invalid arguments ...\n");
 		return -1;
 	}
+	if (blob->blob_data) {
+		rpc_SetErr(EPERM, "Error:: already mmapped object found!\n");
+		return -1;
+	}
 
 	memset(szFName, 0, sizeof szFName);
 	snprintf(szFName, sizeof szFName, BLOB_FILE, srv->srv_blob.dir, blob->blob_var);
@@ -297,6 +301,7 @@ rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t
 		return -1;
 	}
 
+	/* send BLOB to server */
 	for (ret = AIT_LEN(var), pos = data; ret > 0; ret -= len, pos += len)
 		if ((len = send(cli->cli_sock, pos, ret, 0)) == -1) {
 			LOGERR;
@@ -337,7 +342,7 @@ rpc_cli_sendBLOB(rpc_cli_t * __restrict cli, ait_val_t
  * return: -1 error, 0 ok, 1 remote error
  */
 int
-rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** data)
+rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t * __restrict var, void ** __restrict data)
 {
 	int ret, len;
 	uint8_t *pos;
@@ -369,6 +374,7 @@ rpc_cli_recvBLOB(rpc_cli_t * __restrict cli, ait_val_t
 		return -1;
 	}
 
+	/* receive BLOB from server */
 	for (ret = AIT_LEN(var), pos = *data; ret > 0; ret -= len, pos += len) {
 		FD_ZERO(&fds);
 		FD_SET(cli->cli_sock, &fds);