1 /* $NetBSD: svc_dg.c,v 1.18 2024/01/23 17:24:38 christos Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
36 */
37
38 /* #ident "@(#)svc_dg.c 1.17 94/04/24 SMI" */
39
40
41 /*
42 * svc_dg.c, Server side for connectionless RPC.
43 *
44 * Does some caching in the hopes of achieving execute-at-most-once semantics.
45 */
46
47 #include <sys/cdefs.h>
48 #if defined(LIBC_SCCS) && !defined(lint)
49 __RCSID("$NetBSD: svc_dg.c,v 1.18 2024/01/23 17:24:38 christos Exp $");
50 #endif
51
52 #include "namespace.h"
53 #include "reentrant.h"
54 #include <sys/types.h>
55 #include <sys/socket.h>
56 #include <rpc/rpc.h>
57 #include <assert.h>
58 #include <errno.h>
59 #include <unistd.h>
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #ifdef RPC_CACHE_DEBUG
64 #include <netconfig.h>
65 #include <netdir.h>
66 #endif
67 #include <err.h>
68
69 #include "svc_fdset.h"
70 #include "rpc_internal.h"
71 #include "svc_dg.h"
72
73 #define su_data(xprt) ((struct svc_dg_data *)(xprt->xp_p2))
74 #define rpc_buffer(xprt) ((xprt)->xp_p1)
75
76 #ifdef __weak_alias
77 __weak_alias(svc_dg_create,_svc_dg_create)
78 #endif
79
80 #ifndef MAX
81 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
82 #endif
83
84 static void svc_dg_ops(SVCXPRT *);
85 static enum xprt_stat svc_dg_stat(SVCXPRT *);
86 static bool_t svc_dg_recv(SVCXPRT *, struct rpc_msg *);
87 static bool_t svc_dg_reply(SVCXPRT *, struct rpc_msg *);
88 static bool_t svc_dg_getargs(SVCXPRT *, xdrproc_t, caddr_t);
89 static bool_t svc_dg_freeargs(SVCXPRT *, xdrproc_t, caddr_t);
90 static void svc_dg_destroy(SVCXPRT *);
91 static bool_t svc_dg_control(SVCXPRT *, const u_int, void *);
92 static int cache_get(SVCXPRT *, struct rpc_msg *, char **, size_t *);
93 static void cache_set(SVCXPRT *, size_t);
94
95 /*
96 * Usage:
97 * xprt = svc_dg_create(sock, sendsize, recvsize);
98 * Does other connectionless specific initializations.
99 * Once *xprt is initialized, it is registered.
100 * see (svc.h, xprt_register). If recvsize or sendsize are 0 suitable
101 * system defaults are chosen.
102 * The routines returns NULL if a problem occurred.
103 */
104 static const char svc_dg_str[] = "svc_dg_create: %s";
105 static const char svc_dg_err1[] = "could not get transport information";
106 static const char svc_dg_err2[] = " transport does not support data transfer";
107 static const char __no_mem_str[] = "out of memory";
108
109 SVCXPRT *
svc_dg_create(int fd,u_int sendsize,u_int recvsize)110 svc_dg_create(int fd, u_int sendsize, u_int recvsize)
111 {
112 SVCXPRT *xprt;
113 struct svc_dg_data *su = NULL;
114 struct __rpc_sockinfo si;
115 struct sockaddr_storage ss;
116 socklen_t slen;
117
118 if (!__rpc_fd2sockinfo(fd, &si)) {
119 warnx(svc_dg_str, svc_dg_err1);
120 return (NULL);
121 }
122 /*
123 * Find the receive and the send size
124 */
125 sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
126 recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
127 if ((sendsize == 0) || (recvsize == 0)) {
128 warnx(svc_dg_str, svc_dg_err2);
129 return (NULL);
130 }
131
132 xprt = mem_alloc(sizeof (SVCXPRT));
133 if (xprt == NULL)
134 goto outofmem;
135 memset(xprt, 0, sizeof (SVCXPRT));
136
137 su = mem_alloc(sizeof (*su));
138 if (su == NULL)
139 goto outofmem;
140 su->su_iosz = ((MAX(sendsize, recvsize) + 3) / 4) * 4;
141 if ((rpc_buffer(xprt) = malloc(su->su_iosz)) == NULL)
142 goto outofmem;
143 _DIAGASSERT(__type_fit(u_int, su->su_iosz));
144 xdrmem_create(&(su->su_xdrs), rpc_buffer(xprt), (u_int)su->su_iosz,
145 XDR_DECODE);
146 su->su_cache = NULL;
147 xprt->xp_fd = fd;
148 xprt->xp_p2 = (caddr_t)(void *)su;
149 xprt->xp_verf.oa_base = su->su_verfbody;
150 svc_dg_ops(xprt);
151 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
152
153 slen = sizeof ss;
154 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
155 goto freedata;
156 xprt->xp_ltaddr.buf = mem_alloc(sizeof (struct sockaddr_storage));
157 xprt->xp_ltaddr.maxlen = sizeof (struct sockaddr_storage);
158 xprt->xp_ltaddr.len = slen;
159 memcpy(xprt->xp_ltaddr.buf, &ss, slen);
160
161 if (!xprt_register(xprt))
162 goto freedata;
163 return (xprt);
164
165 outofmem:
166 (void) warnx(svc_dg_str, __no_mem_str);
167 freedata:
168 if (xprt) {
169 if (su)
170 (void) mem_free(su, sizeof (*su));
171 (void) mem_free(xprt, sizeof (SVCXPRT));
172 }
173 return (NULL);
174 }
175
176 /*ARGSUSED*/
177 static enum xprt_stat
svc_dg_stat(SVCXPRT * xprt)178 svc_dg_stat(SVCXPRT *xprt)
179 {
180 return (XPRT_IDLE);
181 }
182
183 static bool_t
svc_dg_recv(SVCXPRT * xprt,struct rpc_msg * msg)184 svc_dg_recv(SVCXPRT *xprt, struct rpc_msg *msg)
185 {
186 struct svc_dg_data *su;
187 XDR *xdrs;
188 char *reply;
189 struct sockaddr_storage ss;
190 socklen_t alen;
191 size_t replylen;
192 ssize_t rlen;
193
194 _DIAGASSERT(xprt != NULL);
195 _DIAGASSERT(msg != NULL);
196
197 su = su_data(xprt);
198 xdrs = &(su->su_xdrs);
199
200 again:
201 alen = sizeof (struct sockaddr_storage);
202 rlen = recvfrom(xprt->xp_fd, rpc_buffer(xprt), su->su_iosz, 0,
203 (struct sockaddr *)(void *)&ss, &alen);
204 if (rlen == -1 && errno == EINTR)
205 goto again;
206 if (rlen == -1 || (rlen < (ssize_t)(4 * sizeof (u_int32_t))))
207 return (FALSE);
208 if (xprt->xp_rtaddr.len < alen) {
209 if (xprt->xp_rtaddr.len != 0)
210 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.len);
211 xprt->xp_rtaddr.buf = mem_alloc(alen);
212 xprt->xp_rtaddr.len = alen;
213 }
214 memcpy(xprt->xp_rtaddr.buf, &ss, alen);
215 #ifdef PORTMAP
216 if (ss.ss_family == AF_INET) {
217 xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
218 xprt->xp_addrlen = sizeof (struct sockaddr_in);
219 }
220 #endif
221 xdrs->x_op = XDR_DECODE;
222 XDR_SETPOS(xdrs, 0);
223 if (! xdr_callmsg(xdrs, msg)) {
224 return (FALSE);
225 }
226 su->su_xid = msg->rm_xid;
227 if (su->su_cache != NULL) {
228 if (cache_get(xprt, msg, &reply, &replylen)) {
229 (void)sendto(xprt->xp_fd, reply, replylen, 0,
230 (struct sockaddr *)(void *)&ss, alen);
231 return (FALSE);
232 }
233 }
234 return (TRUE);
235 }
236
237 static bool_t
svc_dg_reply(SVCXPRT * xprt,struct rpc_msg * msg)238 svc_dg_reply(SVCXPRT *xprt, struct rpc_msg *msg)
239 {
240 struct svc_dg_data *su;
241 XDR *xdrs;
242 bool_t stat = FALSE;
243 size_t slen;
244
245 _DIAGASSERT(xprt != NULL);
246 _DIAGASSERT(msg != NULL);
247
248 su = su_data(xprt);
249 xdrs = &(su->su_xdrs);
250
251 xdrs->x_op = XDR_ENCODE;
252 XDR_SETPOS(xdrs, 0);
253 msg->rm_xid = su->su_xid;
254 if (xdr_replymsg(xdrs, msg)) {
255 slen = XDR_GETPOS(xdrs);
256 if (sendto(xprt->xp_fd, rpc_buffer(xprt), slen, 0,
257 (struct sockaddr *)xprt->xp_rtaddr.buf,
258 (socklen_t)xprt->xp_rtaddr.len) == (ssize_t) slen) {
259 stat = TRUE;
260 if (su->su_cache)
261 cache_set(xprt, slen);
262 }
263 }
264 return (stat);
265 }
266
267 static bool_t
svc_dg_getargs(SVCXPRT * xprt,xdrproc_t xdr_args,caddr_t args_ptr)268 svc_dg_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
269 {
270 return (*xdr_args)(&(su_data(xprt)->su_xdrs), args_ptr);
271 }
272
273 static bool_t
svc_dg_freeargs(SVCXPRT * xprt,xdrproc_t xdr_args,caddr_t args_ptr)274 svc_dg_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
275 {
276 XDR *xdrs;
277
278 _DIAGASSERT(xprt != NULL);
279
280 xdrs = &(su_data(xprt)->su_xdrs);
281 xdrs->x_op = XDR_FREE;
282 return (*xdr_args)(xdrs, args_ptr);
283 }
284
285 static void
svc_dg_destroy(SVCXPRT * xprt)286 svc_dg_destroy(SVCXPRT *xprt)
287 {
288 struct svc_dg_data *su;
289
290 _DIAGASSERT(xprt != NULL);
291
292 su = su_data(xprt);
293
294 xprt_unregister(xprt);
295 if (xprt->xp_fd != -1)
296 (void)close(xprt->xp_fd);
297 XDR_DESTROY(&(su->su_xdrs));
298 (void) mem_free(rpc_buffer(xprt), su->su_iosz);
299 (void) mem_free(su, sizeof (*su));
300 if (xprt->xp_rtaddr.buf)
301 (void) mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
302 if (xprt->xp_ltaddr.buf)
303 (void) mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
304 if (xprt->xp_tp)
305 (void) free(xprt->xp_tp);
306 (void) mem_free(xprt, sizeof (SVCXPRT));
307 }
308
309 static bool_t
310 /*ARGSUSED*/
svc_dg_control(SVCXPRT * xprt,const u_int rq,void * in)311 svc_dg_control(SVCXPRT *xprt, const u_int rq, void *in)
312 {
313 return (FALSE);
314 }
315
316 static void
svc_dg_ops(SVCXPRT * xprt)317 svc_dg_ops(SVCXPRT *xprt)
318 {
319 static struct xp_ops ops;
320 static struct xp_ops2 ops2;
321
322 _DIAGASSERT(xprt != NULL);
323
324 /* VARIABLES PROTECTED BY ops_lock: ops */
325
326 mutex_lock(&ops_lock);
327 if (ops.xp_recv == NULL) {
328 ops.xp_recv = svc_dg_recv;
329 ops.xp_stat = svc_dg_stat;
330 ops.xp_getargs = svc_dg_getargs;
331 ops.xp_reply = svc_dg_reply;
332 ops.xp_freeargs = svc_dg_freeargs;
333 ops.xp_destroy = svc_dg_destroy;
334 ops2.xp_control = svc_dg_control;
335 }
336 xprt->xp_ops = &ops;
337 xprt->xp_ops2 = &ops2;
338 mutex_unlock(&ops_lock);
339 }
340
341 /* The CACHING COMPONENT */
342
343 /*
344 * Could have been a separate file, but some part of it depends upon the
345 * private structure of the client handle.
346 *
347 * Fifo cache for cl server
348 * Copies pointers to reply buffers into fifo cache
349 * Buffers are sent again if retransmissions are detected.
350 */
351
352 #define SPARSENESS 4 /* 75% sparse */
353
354 #define ALLOC(type, size) \
355 mem_alloc((sizeof (type) * (size)))
356
357 #define MEMZERO(addr, type, size) \
358 (void) memset((void *) (addr), 0, sizeof (type) * (int) (size))
359
360 #define FREE(addr, type, size) \
361 mem_free((addr), (sizeof (type) * (size)))
362
363 /*
364 * An entry in the cache
365 */
366 typedef struct cache_node *cache_ptr;
367 struct cache_node {
368 /*
369 * Index into cache is xid, proc, vers, prog and address
370 */
371 u_int32_t cache_xid;
372 rpcproc_t cache_proc;
373 rpcvers_t cache_vers;
374 rpcprog_t cache_prog;
375 struct netbuf cache_addr;
376 /*
377 * The cached reply and length
378 */
379 char *cache_reply;
380 size_t cache_replylen;
381 /*
382 * Next node on the list, if there is a collision
383 */
384 cache_ptr cache_next;
385 };
386
387 /*
388 * The entire cache
389 */
390 struct cl_cache {
391 u_int uc_size; /* size of cache */
392 cache_ptr *uc_entries; /* hash table of entries in cache */
393 cache_ptr *uc_fifo; /* fifo list of entries in cache */
394 u_int uc_nextvictim; /* points to next victim in fifo list */
395 rpcprog_t uc_prog; /* saved program number */
396 rpcvers_t uc_vers; /* saved version number */
397 rpcproc_t uc_proc; /* saved procedure number */
398 };
399
400
401 /*
402 * the hashing function
403 */
404 #define CACHE_LOC(transp, xid) \
405 (xid % (SPARSENESS * ((struct cl_cache *) \
406 su_data(transp)->su_cache)->uc_size))
407
408 /*
409 * Enable use of the cache. Returns 1 on success, 0 on failure.
410 * Note: there is no disable.
411 */
412 static const char cache_enable_str[] = "svc_enablecache: %s %s";
413 static const char alloc_err[] = "could not allocate cache ";
414 static const char enable_err[] = "cache already enabled";
415
416 int
svc_dg_enablecache(SVCXPRT * transp,u_int size)417 svc_dg_enablecache(SVCXPRT *transp, u_int size)
418 {
419 struct svc_dg_data *su;
420 struct cl_cache *uc;
421
422 _DIAGASSERT(transp != NULL);
423
424 su = su_data(transp);
425
426 mutex_lock(&dupreq_lock);
427 if (su->su_cache != NULL) {
428 (void) warnx(cache_enable_str, enable_err, " ");
429 mutex_unlock(&dupreq_lock);
430 return (0);
431 }
432 uc = ALLOC(struct cl_cache, 1);
433 if (uc == NULL) {
434 warnx(cache_enable_str, alloc_err, " ");
435 mutex_unlock(&dupreq_lock);
436 return (0);
437 }
438 uc->uc_size = size;
439 uc->uc_nextvictim = 0;
440 uc->uc_entries = ALLOC(cache_ptr, size * SPARSENESS);
441 if (uc->uc_entries == NULL) {
442 warnx(cache_enable_str, alloc_err, "data");
443 FREE(uc, struct cl_cache, 1);
444 mutex_unlock(&dupreq_lock);
445 return (0);
446 }
447 MEMZERO(uc->uc_entries, cache_ptr, size * SPARSENESS);
448 uc->uc_fifo = ALLOC(cache_ptr, size);
449 if (uc->uc_fifo == NULL) {
450 warnx(cache_enable_str, alloc_err, "fifo");
451 FREE(uc->uc_entries, cache_ptr, size * SPARSENESS);
452 FREE(uc, struct cl_cache, 1);
453 mutex_unlock(&dupreq_lock);
454 return (0);
455 }
456 MEMZERO(uc->uc_fifo, cache_ptr, size);
457 su->su_cache = (char *)(void *)uc;
458 mutex_unlock(&dupreq_lock);
459 return (1);
460 }
461
462 /*
463 * Set an entry in the cache. It assumes that the uc entry is set from
464 * the earlier call to cache_get() for the same procedure. This will always
465 * happen because cache_get() is calle by svc_dg_recv and cache_set() is called
466 * by svc_dg_reply(). All this hoopla because the right RPC parameters are
467 * not available at svc_dg_reply time.
468 */
469
470 static const char cache_set_str[] = "cache_set: %s";
471 static const char cache_set_err1[] = "victim not found";
472 static const char cache_set_err2[] = "victim alloc failed";
473 static const char cache_set_err3[] = "could not allocate new rpc buffer";
474
475 static void
cache_set(SVCXPRT * xprt,size_t replylen)476 cache_set(SVCXPRT *xprt, size_t replylen)
477 {
478 cache_ptr victim;
479 cache_ptr *vicp;
480 struct svc_dg_data *su;
481 struct cl_cache *uc;
482 u_int loc;
483 char *newbuf;
484 #ifdef RPC_CACHE_DEBUG
485 struct netconfig *nconf;
486 char *uaddr;
487 #endif
488
489 _DIAGASSERT(xprt != NULL);
490
491 su = su_data(xprt);
492 uc = (struct cl_cache *) su->su_cache;
493
494 mutex_lock(&dupreq_lock);
495 /*
496 * Find space for the new entry, either by
497 * reusing an old entry, or by mallocing a new one
498 */
499 victim = uc->uc_fifo[uc->uc_nextvictim];
500 if (victim != NULL) {
501 loc = CACHE_LOC(xprt, victim->cache_xid);
502 for (vicp = &uc->uc_entries[loc];
503 *vicp != NULL && *vicp != victim;
504 vicp = &(*vicp)->cache_next)
505 ;
506 if (*vicp == NULL) {
507 warnx(cache_set_str, cache_set_err1);
508 mutex_unlock(&dupreq_lock);
509 return;
510 }
511 *vicp = victim->cache_next; /* remove from cache */
512 newbuf = victim->cache_reply;
513 } else {
514 victim = ALLOC(struct cache_node, 1);
515 if (victim == NULL) {
516 warnx(cache_set_str, cache_set_err2);
517 mutex_unlock(&dupreq_lock);
518 return;
519 }
520 newbuf = mem_alloc(su->su_iosz);
521 if (newbuf == NULL) {
522 warnx(cache_set_str, cache_set_err3);
523 FREE(victim, struct cache_node, 1);
524 mutex_unlock(&dupreq_lock);
525 return;
526 }
527 }
528
529 /*
530 * Store it away
531 */
532 #ifdef RPC_CACHE_DEBUG
533 if (nconf = getnetconfigent(xprt->xp_netid)) {
534 uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
535 freenetconfigent(nconf);
536 printf(
537 "cache set for xid= %x prog=%d vers=%d proc=%d for rmtaddr=%s\n",
538 su->su_xid, uc->uc_prog, uc->uc_vers,
539 uc->uc_proc, uaddr);
540 free(uaddr);
541 }
542 #endif
543 victim->cache_replylen = replylen;
544 victim->cache_reply = rpc_buffer(xprt);
545 rpc_buffer(xprt) = newbuf;
546 _DIAGASSERT(__type_fit(u_int, su->su_iosz));
547 xdrmem_create(&(su->su_xdrs), rpc_buffer(xprt), (u_int)su->su_iosz,
548 XDR_ENCODE);
549 victim->cache_xid = su->su_xid;
550 victim->cache_proc = uc->uc_proc;
551 victim->cache_vers = uc->uc_vers;
552 victim->cache_prog = uc->uc_prog;
553 victim->cache_addr = xprt->xp_rtaddr;
554 victim->cache_addr.buf = ALLOC(char, xprt->xp_rtaddr.len);
555 (void) memcpy(victim->cache_addr.buf, xprt->xp_rtaddr.buf,
556 (size_t)xprt->xp_rtaddr.len);
557 loc = CACHE_LOC(xprt, victim->cache_xid);
558 victim->cache_next = uc->uc_entries[loc];
559 uc->uc_entries[loc] = victim;
560 uc->uc_fifo[uc->uc_nextvictim++] = victim;
561 uc->uc_nextvictim %= uc->uc_size;
562 mutex_unlock(&dupreq_lock);
563 }
564
565 /*
566 * Try to get an entry from the cache
567 * return 1 if found, 0 if not found and set the stage for cache_set()
568 */
569 static int
cache_get(SVCXPRT * xprt,struct rpc_msg * msg,char ** replyp,size_t * replylenp)570 cache_get(SVCXPRT *xprt, struct rpc_msg *msg, char **replyp, size_t *replylenp)
571 {
572 u_int loc;
573 cache_ptr ent;
574 struct svc_dg_data *su;
575 struct cl_cache *uc;
576 #ifdef RPC_CACHE_DEBUG
577 struct netconfig *nconf;
578 char *uaddr;
579 #endif
580
581 _DIAGASSERT(xprt != NULL);
582 _DIAGASSERT(msg != NULL);
583 _DIAGASSERT(replyp != NULL);
584 _DIAGASSERT(replylenp != NULL);
585
586 su = su_data(xprt);
587 uc = (struct cl_cache *) su->su_cache;
588
589 mutex_lock(&dupreq_lock);
590 loc = CACHE_LOC(xprt, su->su_xid);
591 for (ent = uc->uc_entries[loc]; ent != NULL; ent = ent->cache_next) {
592 if (ent->cache_xid == su->su_xid &&
593 ent->cache_proc == msg->rm_call.cb_proc &&
594 ent->cache_vers == msg->rm_call.cb_vers &&
595 ent->cache_prog == msg->rm_call.cb_prog &&
596 ent->cache_addr.len == xprt->xp_rtaddr.len &&
597 (memcmp(ent->cache_addr.buf, xprt->xp_rtaddr.buf,
598 xprt->xp_rtaddr.len) == 0)) {
599 #ifdef RPC_CACHE_DEBUG
600 if (nconf = getnetconfigent(xprt->xp_netid)) {
601 uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
602 freenetconfigent(nconf);
603 printf(
604 "cache entry found for xid=%x prog=%d vers=%d proc=%d for rmtaddr=%s\n",
605 su->su_xid, msg->rm_call.cb_prog,
606 msg->rm_call.cb_vers,
607 msg->rm_call.cb_proc, uaddr);
608 free(uaddr);
609 }
610 #endif
611 *replyp = ent->cache_reply;
612 *replylenp = ent->cache_replylen;
613 mutex_unlock(&dupreq_lock);
614 return (1);
615 }
616 }
617 /*
618 * Failed to find entry
619 * Remember a few things so we can do a set later
620 */
621 uc->uc_proc = msg->rm_call.cb_proc;
622 uc->uc_vers = msg->rm_call.cb_vers;
623 uc->uc_prog = msg->rm_call.cb_prog;
624 mutex_unlock(&dupreq_lock);
625 return (0);
626 }
627