[unix-history] / usr / src / new / sunrpc / clnt_udp.c

/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */
#ifndef lint
static char sccsid[] = "@(#)clnt_udp.c 1.5 85/03/17 Copyr 1984 Sun Micro";
#endif

/*
 * clnt_udp.c, Implements a UPD/IP based, client side RPC.
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#include <stdio.h>
#include "types.h"
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#include "xdr.h"
#include "auth.h"
#include "clnt.h"
#include "rpc_msg.h"
#include "pmap_clnt.h"

char *malloc();
extern int errno;
long random();

/*
 * UDP bases client side rpc operations
 */
static enum clnt_stat	clntudp_call();
static void		clntudp_abort();
static void		clntudp_geterr();
static bool_t		clntudp_freeres();
static void		clntudp_destroy();

static struct clnt_ops udp_ops = {
	clntudp_call,
	clntudp_abort,
	clntudp_geterr,
	clntudp_freeres,
	clntudp_destroy
};

/* 
 * Private data kept per client handle
 */
struct cu_data {
	int		   cu_sock;
	struct sockaddr_in cu_raddr;
	int		   cu_rlen;
	struct timeval	   cu_wait;
	struct rpc_err	   cu_error;
	XDR		   cu_outxdrs;
	u_int		   cu_xdrpos;
	char		   cu_outbuf[UDPMSGSIZE];
	char		   cu_inbuf[UDPMSGSIZE];
};

/*
 * Create a UDP based client handle.
 * If *sockp<0, *sockp is set to a newly created UPD socket.
 * If raddr->sin_port is 0 a binder on the remote machine
 * is consulted for the correct port number.
 * NB: It is the clients responsibility to close *sockp.
 * NB: The rpch->cl_auth is initialized to null authentication.
 *     Caller may wish to set this something more useful.
 *
 * wait is the amount of time used between retransmitting a call if
 * no response has been heard;  retransmition occurs until the actual
 * rpc call times out.
 */
CLIENT *
clntudp_create(raddr, program, version, wait, sockp)
	struct sockaddr_in *raddr;
	u_long program;
	u_long version;
	struct timeval wait;
	register int *sockp;
{
	CLIENT *cl;
	register struct cu_data *cu;
	struct timeval now;
	struct rpc_msg call_msg;

	cl = (CLIENT *)mem_alloc(sizeof(CLIENT));
	if (cl == NULL) {
		fprintf(stderr, "clntudp_create: out of memory\n");
		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
		rpc_createerr.cf_error.re_errno = errno;
		goto fooy;
	}
	cu = (struct cu_data *)mem_alloc(sizeof(*cu));
	if (cu == NULL) {
		fprintf(stderr, "clntudp_create: out of memory\n");
		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
		rpc_createerr.cf_error.re_errno = errno;
		goto fooy;
	}

	(void)gettimeofday(&now, (struct timezone *)0);
	if (raddr->sin_port == 0) {
		u_short port;
		if ((port =
		    pmap_getport(raddr, program, version, IPPROTO_UDP)) == 0) {
			goto fooy;
		}
		raddr->sin_port = htons(port);
	}
	cl->cl_ops = &udp_ops;
	cl->cl_private = (caddr_t)cu;
	cu->cu_raddr = *raddr;
	cu->cu_rlen = sizeof (cu->cu_raddr);
	cu->cu_wait = wait;
	call_msg.rm_xid = getpid() ^ (int)random() ^ now.tv_sec ^ now.tv_usec;
	call_msg.rm_direction = CALL;
	call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
	call_msg.rm_call.cb_prog = program;
	call_msg.rm_call.cb_vers = version;
	xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf,
	    UDPMSGSIZE, XDR_ENCODE);
	if (! xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) {
		goto fooy;
	}
	cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs));
	cu->cu_sock = (*sockp < 0) ?
	    (*sockp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) :
	    *sockp;
	if (cu->cu_sock < 0) {
		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
		rpc_createerr.cf_error.re_errno = errno;
		goto fooy;
	}
	cl->cl_auth = authnone_create();
	return (cl);
fooy:
	mem_free((caddr_t)cu, sizeof(*cu));
	mem_free((caddr_t)cl, sizeof(CLIENT));
	return ((CLIENT *)NULL);
}

static enum clnt_stat 
clntudp_call(cl, proc, xargs, argsp, xresults, resultsp, timeout)
	register CLIENT	*cl;		/* client handle */
	u_long		proc;		/* procedure number */
	xdrproc_t	xargs;		/* xdr routine for args */
	caddr_t		argsp;		/* pointer to args */
	xdrproc_t	xresults;	/* xdr routine for results */
	caddr_t		resultsp;	/* pointer to results */
	struct timeval	timeout;	/* seconds to wait before giving up */
{
	register struct cu_data *cu = (struct cu_data *)cl->cl_private;
	register XDR *xdrs;
	register int outlen;
	register int inlen;
	int readfds, fromlen;
	register int mask;
	struct sockaddr_in from;
	struct rpc_msg reply_msg;
	XDR reply_xdrs;
	struct timeval time_waited;
	bool_t ok;

call_again:
	time_waited.tv_sec = 0;
	time_waited.tv_usec = 0;
	xdrs = &(cu->cu_outxdrs);
	xdrs->x_op = XDR_ENCODE;
	XDR_SETPOS(xdrs, cu->cu_xdrpos);
	/*
	 * the transaction is the first thing in the out buffer
	 */
	(*(u_short *)(cu->cu_outbuf))++;
	if ((! XDR_PUTLONG(xdrs, (long *)&proc)) ||
	    (! AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
	    (! (*xargs)(xdrs, argsp)))
		return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
	outlen = (int)XDR_GETPOS(xdrs);
	while (TRUE) {

		if (sendto(cu->cu_sock, cu->cu_outbuf, outlen, 0,
		    (struct sockaddr *)&(cu->cu_raddr), cu->cu_rlen)
		    != outlen) {
			cu->cu_error.re_errno = errno;
			return (cu->cu_error.re_status = RPC_CANTSEND);
		}
		/*
		 * sub-optimal code appears inside the loop because we have
		 * some clock time to spare while the packets are in flight.
		 * (We assume that this is actually only executed once.)
		 */
		reply_msg.acpted_rply.ar_verf = _null_auth;
		reply_msg.acpted_rply.ar_results.where = resultsp;
		reply_msg.acpted_rply.ar_results.proc = xresults;
		mask = 1 << cu->cu_sock;
rcv_again:
		readfds = mask;
		switch (select(32, &readfds, (int *)NULL, (int *)NULL,
		    &(cu->cu_wait))) {

		case 0:
			time_waited.tv_sec += cu->cu_wait.tv_sec;
			time_waited.tv_usec += cu->cu_wait.tv_usec;
			while (time_waited.tv_usec >= 1000000) {
				time_waited.tv_sec++;
				time_waited.tv_usec -= 1000000;
			}
			if ((time_waited.tv_sec < timeout.tv_sec) ||
				((time_waited.tv_sec == timeout.tv_sec) &&
				(time_waited.tv_usec < timeout.tv_usec)))
				continue;
			return (cu->cu_error.re_status = RPC_TIMEDOUT);

		case -1:
			if (errno == EINTR)
				goto rcv_again;
			cu->cu_error.re_errno = errno;
			return (cu->cu_error.re_status = RPC_CANTRECV);
		}
		if ((readfds & mask) == 0)
			goto rcv_again;
tryagain:
		fromlen = sizeof(struct sockaddr);
		inlen = recvfrom(cu->cu_sock, cu->cu_inbuf, UDPMSGSIZE, 0,
		    (struct sockaddr *)&from, &fromlen);
		if (inlen < 0) {
			if (errno == EINTR)
				goto tryagain;
			cu->cu_error.re_errno = errno;
			return (cu->cu_error.re_status = RPC_CANTRECV);
		}
		if (inlen < sizeof(u_long))
			goto rcv_again;
		/* see if reply transaction id matches sent id */
		if (*((u_long *)(cu->cu_inbuf)) != *((u_long *)(cu->cu_outbuf)))
			goto rcv_again;
		/* we now assume we have the proper reply */
		break;
	}

	/*
	 * now decode and validate the response
	 */
	xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)inlen, XDR_DECODE);
	ok = xdr_replymsg(&reply_xdrs, &reply_msg);
	/* XDR_DESTROY(&reply_xdrs);  save a few cycles on noop destroy */
	if (ok) {
		_seterr_reply(&reply_msg, &(cu->cu_error));
		if (cu->cu_error.re_status == RPC_SUCCESS) {
			if (! AUTH_VALIDATE(cl->cl_auth,
				&reply_msg.acpted_rply.ar_verf)) {
				cu->cu_error.re_status = RPC_AUTHERROR;
				cu->cu_error.re_why = AUTH_INVALIDRESP;
			}
			if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
				xdrs->x_op = XDR_FREE;
				(void)xdr_opaque_auth(xdrs,
				    &(reply_msg.acpted_rply.ar_verf));
			} 
		}  /* end successful completion */
		else {
			/* maybe our credentials need to be refreshed ... */
			if (AUTH_REFRESH(cl->cl_auth))
				goto call_again;
		}  /* end of unsuccessful completion */
	}  /* end of valid reply message */
	else {
		cu->cu_error.re_status = RPC_CANTDECODERES;
	}
	return (cu->cu_error.re_status);
}

static void
clntudp_geterr(cl, errp)
	CLIENT *cl;
	struct rpc_err *errp;
{
	register struct cu_data *cu = (struct cu_data *)cl->cl_private;

	*errp = cu->cu_error;
}


static bool_t
clntudp_freeres(cl, xdr_res, res_ptr)
	CLIENT *cl;
	xdrproc_t xdr_res;
	caddr_t res_ptr;
{
	register struct cu_data *cu = (struct cu_data *)cl->cl_private;
	register XDR *xdrs = &(cu->cu_outxdrs);

	xdrs->x_op = XDR_FREE;
	return ((*xdr_res)(xdrs, res_ptr));
}

static void 
clntudp_abort(/*h*/)
	/*CLIENT *h;*/
{
}

static void
clntudp_destroy(cl)
	CLIENT *cl;
{
	register struct cu_data *cu = (struct cu_data *)cl->cl_private;

	XDR_DESTROY(&(cu->cu_outxdrs));
	mem_free((caddr_t)cu, sizeof(*cu));
	mem_free((caddr_t)cl, sizeof(CLIENT));
}
Commit	Line	Data
95f51977 C	1	/*
	2	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	3	* unrestricted use provided that this legend is included on all tape
	4	* media and as a part of the software program in whole or part. Users
	5	* may copy or modify Sun RPC without charge, but are not authorized
	6	* to license or distribute it to anyone else except as part of a product or
	7	* program developed by the user.
	8	*
	9	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	10	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	11	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	12	*
	13	* Sun RPC is provided with no support and without any obligation on the
	14	* part of Sun Microsystems, Inc. to assist in its use, correction,
	15	* modification or enhancement.
	16	*
	17	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	18	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	19	* OR ANY PART THEREOF.
	20	*
	21	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	22	* or profits or other special, indirect and consequential damages, even if
	23	* Sun has been advised of the possibility of such damages.
	24	*
	25	* Sun Microsystems, Inc.
	26	* 2550 Garcia Avenue
	27	* Mountain View, California 94043
	28	*/
	29	#ifndef lint
	30	static char sccsid[] = "@(#)clnt_udp.c 1.5 85/03/17 Copyr 1984 Sun Micro";
	31	#endif
	32
	33	/*
	34	* clnt_udp.c, Implements a UPD/IP based, client side RPC.
	35	*
	36	* Copyright (C) 1984, Sun Microsystems, Inc.
	37	*/
	38
	39	#include <stdio.h>
	40	#include "types.h"
	41	#include <sys/socket.h>
	42	#include <sys/time.h>
	43	#include <netinet/in.h>
	44	#include <netdb.h>
	45	#include <errno.h>
	46	#include "xdr.h"
	47	#include "auth.h"
	48	#include "clnt.h"
	49	#include "rpc_msg.h"
	50	#include "pmap_clnt.h"
	51
	52	char *malloc();
	53	extern int errno;
	54	long random();
	55
	56	/*
	57	* UDP bases client side rpc operations
	58	*/
	59	static enum clnt_stat clntudp_call();
	60	static void clntudp_abort();
	61	static void clntudp_geterr();
	62	static bool_t clntudp_freeres();
	63	static void clntudp_destroy();
	64
65	static struct clnt_ops udp_ops = {
66	clntudp_call,
67	clntudp_abort,
68	clntudp_geterr,
69	clntudp_freeres,
70	clntudp_destroy
71	};
72
73	/*
74	* Private data kept per client handle
75	*/
76	struct cu_data {
77	int cu_sock;
78	struct sockaddr_in cu_raddr;
79	int cu_rlen;
80	struct timeval cu_wait;
81	struct rpc_err cu_error;
82	XDR cu_outxdrs;
83	u_int cu_xdrpos;
84	char cu_outbuf[UDPMSGSIZE];
85	char cu_inbuf[UDPMSGSIZE];
86	};
87
88	/*
89	* Create a UDP based client handle.
90	* If sockp<0, sockp is set to a newly created UPD socket.
91	* If raddr->sin_port is 0 a binder on the remote machine
92	* is consulted for the correct port number.
93	* NB: It is the clients responsibility to close *sockp.
94	* NB: The rpch->cl_auth is initialized to null authentication.
95	* Caller may wish to set this something more useful.
96	*
97	* wait is the amount of time used between retransmitting a call if
98	* no response has been heard; retransmition occurs until the actual
99	* rpc call times out.
100	*/
101	CLIENT *
102	clntudp_create(raddr, program, version, wait, sockp)
103	struct sockaddr_in *raddr;
104	u_long program;
105	u_long version;
106	struct timeval wait;
107	register int *sockp;
108	{
109	CLIENT *cl;
110	register struct cu_data *cu;
111	struct timeval now;
112	struct rpc_msg call_msg;
113
114	cl = (CLIENT *)mem_alloc(sizeof(CLIENT));
115	if (cl == NULL) {
116	fprintf(stderr, "clntudp_create: out of memory\n");
117	rpc_createerr.cf_stat = RPC_SYSTEMERROR;
118	rpc_createerr.cf_error.re_errno = errno;
119	goto fooy;
120	}
121	cu = (struct cu_data )mem_alloc(sizeof(cu));
122	if (cu == NULL) {
123	fprintf(stderr, "clntudp_create: out of memory\n");
124	rpc_createerr.cf_stat = RPC_SYSTEMERROR;
125	rpc_createerr.cf_error.re_errno = errno;
126	goto fooy;
127	}
128
129	(void)gettimeofday(&now, (struct timezone *)0);
130	if (raddr->sin_port == 0) {
131	u_short port;
132	if ((port =
133	pmap_getport(raddr, program, version, IPPROTO_UDP)) == 0) {
134	goto fooy;
135	}
136	raddr->sin_port = htons(port);
137	}
138	cl->cl_ops = &udp_ops;
139	cl->cl_private = (caddr_t)cu;
140	cu->cu_raddr = *raddr;
141	cu->cu_rlen = sizeof (cu->cu_raddr);
142	cu->cu_wait = wait;
143	call_msg.rm_xid = getpid() ^ (int)random() ^ now.tv_sec ^ now.tv_usec;
144	call_msg.rm_direction = CALL;
145	call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
146	call_msg.rm_call.cb_prog = program;
147	call_msg.rm_call.cb_vers = version;
148	xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf,
149	UDPMSGSIZE, XDR_ENCODE);
150	if (! xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) {
151	goto fooy;
152	}
153	cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs));
154	cu->cu_sock = (*sockp < 0) ?
155	(*sockp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) :
156	*sockp;
157	if (cu->cu_sock < 0) {
158	rpc_createerr.cf_stat = RPC_SYSTEMERROR;
159	rpc_createerr.cf_error.re_errno = errno;
160	goto fooy;
161	}
162	cl->cl_auth = authnone_create();
163	return (cl);
164	fooy:
165	mem_free((caddr_t)cu, sizeof(*cu));
166	mem_free((caddr_t)cl, sizeof(CLIENT));
167	return ((CLIENT *)NULL);
168	}
169
170	static enum clnt_stat
171	clntudp_call(cl, proc, xargs, argsp, xresults, resultsp, timeout)
172	register CLIENT cl; / client handle */
173	u_long proc; /* procedure number */
174	xdrproc_t xargs; /* xdr routine for args */
175	caddr_t argsp; /* pointer to args */
176	xdrproc_t xresults; /* xdr routine for results */
177	caddr_t resultsp; /* pointer to results */
178	struct timeval timeout; /* seconds to wait before giving up */
179	{
180	register struct cu_data cu = (struct cu_data )cl->cl_private;
181	register XDR *xdrs;
182	register int outlen;
183	register int inlen;
184	int readfds, fromlen;
185	register int mask;
186	struct sockaddr_in from;
187	struct rpc_msg reply_msg;
188	XDR reply_xdrs;
189	struct timeval time_waited;
190	bool_t ok;
191
192	call_again:
193	time_waited.tv_sec = 0;
194	time_waited.tv_usec = 0;
195	xdrs = &(cu->cu_outxdrs);
196	xdrs->x_op = XDR_ENCODE;
197	XDR_SETPOS(xdrs, cu->cu_xdrpos);
198	/*
199	* the transaction is the first thing in the out buffer
200	*/
201	((u_short )(cu->cu_outbuf))++;
202	if ((! XDR_PUTLONG(xdrs, (long *)&proc)) \|\|
203	(! AUTH_MARSHALL(cl->cl_auth, xdrs)) \|\|
204	(! (*xargs)(xdrs, argsp)))
205	return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
206	outlen = (int)XDR_GETPOS(xdrs);
207	while (TRUE) {
208
209	if (sendto(cu->cu_sock, cu->cu_outbuf, outlen, 0,
210	(struct sockaddr *)&(cu->cu_raddr), cu->cu_rlen)
211	!= outlen) {
212	cu->cu_error.re_errno = errno;
213	return (cu->cu_error.re_status = RPC_CANTSEND);
214	}
215	/*
216	* sub-optimal code appears inside the loop because we have
217	* some clock time to spare while the packets are in flight.
218	* (We assume that this is actually only executed once.)
219	*/
220	reply_msg.acpted_rply.ar_verf = _null_auth;
221	reply_msg.acpted_rply.ar_results.where = resultsp;
222	reply_msg.acpted_rply.ar_results.proc = xresults;
223	mask = 1 << cu->cu_sock;
224	rcv_again:
225	readfds = mask;
226	switch (select(32, &readfds, (int )NULL, (int )NULL,
227	&(cu->cu_wait))) {
228
229	case 0:
230	time_waited.tv_sec += cu->cu_wait.tv_sec;
231	time_waited.tv_usec += cu->cu_wait.tv_usec;
232	while (time_waited.tv_usec >= 1000000) {
233	time_waited.tv_sec++;
234	time_waited.tv_usec -= 1000000;
235	}
236	if ((time_waited.tv_sec < timeout.tv_sec) \|\|
237	((time_waited.tv_sec == timeout.tv_sec) &&
238	(time_waited.tv_usec < timeout.tv_usec)))
239	continue;
240	return (cu->cu_error.re_status = RPC_TIMEDOUT);
241
242	case -1:
243	if (errno == EINTR)
244	goto rcv_again;
245	cu->cu_error.re_errno = errno;
246	return (cu->cu_error.re_status = RPC_CANTRECV);
247	}
248	if ((readfds & mask) == 0)
249	goto rcv_again;
250	tryagain:
251	fromlen = sizeof(struct sockaddr);
252	inlen = recvfrom(cu->cu_sock, cu->cu_inbuf, UDPMSGSIZE, 0,
253	(struct sockaddr *)&from, &fromlen);
254	if (inlen < 0) {
255	if (errno == EINTR)
256	goto tryagain;
257	cu->cu_error.re_errno = errno;
258	return (cu->cu_error.re_status = RPC_CANTRECV);
259	}
260	if (inlen < sizeof(u_long))
261	goto rcv_again;
262	/* see if reply transaction id matches sent id */
263	if (((u_long )(cu->cu_inbuf)) != ((u_long )(cu->cu_outbuf)))
264	goto rcv_again;
265	/* we now assume we have the proper reply */
266	break;
267	}
268
269	/*
270	* now decode and validate the response
271	*/
272	xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)inlen, XDR_DECODE);
273	ok = xdr_replymsg(&reply_xdrs, &reply_msg);
274	/* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */
275	if (ok) {
276	_seterr_reply(&reply_msg, &(cu->cu_error));
277	if (cu->cu_error.re_status == RPC_SUCCESS) {
278	if (! AUTH_VALIDATE(cl->cl_auth,
279	&reply_msg.acpted_rply.ar_verf)) {
280	cu->cu_error.re_status = RPC_AUTHERROR;
281	cu->cu_error.re_why = AUTH_INVALIDRESP;
282	}
283	if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
284	xdrs->x_op = XDR_FREE;
285	(void)xdr_opaque_auth(xdrs,
286	&(reply_msg.acpted_rply.ar_verf));
287	}
288	} /* end successful completion */
289	else {
290	/* maybe our credentials need to be refreshed ... */
291	if (AUTH_REFRESH(cl->cl_auth))
292	goto call_again;
293	} /* end of unsuccessful completion */
294	} /* end of valid reply message */
295	else {
296	cu->cu_error.re_status = RPC_CANTDECODERES;
297	}
298	return (cu->cu_error.re_status);
299	}
300
301	static void
302	clntudp_geterr(cl, errp)
303	CLIENT *cl;
304	struct rpc_err *errp;
305	{
306	register struct cu_data cu = (struct cu_data )cl->cl_private;
307
308	*errp = cu->cu_error;
309	}
310
311
312	static bool_t
313	clntudp_freeres(cl, xdr_res, res_ptr)
314	CLIENT *cl;
315	xdrproc_t xdr_res;
316	caddr_t res_ptr;
317	{
318	register struct cu_data cu = (struct cu_data )cl->cl_private;
319	register XDR *xdrs = &(cu->cu_outxdrs);
320
321	xdrs->x_op = XDR_FREE;
322	return ((*xdr_res)(xdrs, res_ptr));
323	}
324
325	static void
326	clntudp_abort(/h/)
327	/CLIENT h;*/
328	{
329	}
330
331	static void
332	clntudp_destroy(cl)
333	CLIENT *cl;
334	{
335	register struct cu_data cu = (struct cu_data )cl->cl_private;
336
337	XDR_DESTROY(&(cu->cu_outxdrs));
338	mem_free((caddr_t)cu, sizeof(*cu));
339	mem_free((caddr_t)cl, sizeof(CLIENT));
340	}