--- libaitrpc/src/srv.c	2013/11/15 00:21:46	1.21.2.3
+++ libaitrpc/src/srv.c	2013/11/15 09:04:10	1.21.2.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: srv.c,v 1.21.2.3 2013/11/15 00:21:46 misho Exp $
+* $Id: srv.c,v 1.21.2.4 2013/11/15 09:04:10 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -448,7 +448,7 @@ txUDPPacket(sched_task_t *task)
 	rpc_func_t *f = NULL;
 	u_char *buf = AIT_GET_BUF(&c->cli_buf);
 	struct tagRPCCall *rpc = (struct tagRPCCall*) buf;
-	int ret, wlen = sizeof(struct tagRPCCall);
+	int ret, estlen, wlen = sizeof(struct tagRPCCall);
 	struct timespec ts = { DEF_RPC_TIMEOUT, 0 };
 	struct pollfd pfd;
 
@@ -464,6 +464,13 @@ txUDPPacket(sched_task_t *task)
 			rpc->call_rep.ret = RPC_ERROR(-1);
 			rpc->call_rep.eno = RPC_ERROR(rpc_Errno);
 		} else {
+			/* calc estimated length */
+			estlen = ait_resideVars(RPC_RETVARS(c)) + wlen;
+			if (estlen > AIT_LEN(&c->cli_buf))
+				AIT_RE_BUF(&c->cli_buf, estlen);
+			buf = AIT_GET_BUF(&c->cli_buf);
+			rpc = (struct tagRPCCall*) buf;
+
 			rpc->call_argc = htons(array_Size(RPC_RETVARS(c)));
 			/* Go Encapsulate variables */
 			ret = ait_vars2buffer(buf + wlen, AIT_LEN(&c->cli_buf) - wlen, 
@@ -503,6 +510,7 @@ txUDPPacket(sched_task_t *task)
 		}
 		ret = sendto(TASK_FD(task), buf, MIN(wlen, s->srv_netbuf), MSG_NOSIGNAL, 
 				&c->cli_sa.sa, c->cli_sa.sa.sa_len);
+		printf("wl=%d l=%d\n", wlen, ret);
 		if (ret == -1) {
 			/* close connection */
 			schedEvent(TASK_ROOT(task), cbProto[s->srv_proto][CB_CLOSECLIENT],