1/* $NetBSD: clnt_dg.c,v 1.4 2000/07/14 08:40:41 fvdl Exp $ */ 2 3/*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30/* 31 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 32 */ 33 34#if defined(LIBC_SCCS) && !defined(lint) 35#ident "@(#)clnt_dg.c 1.23 94/04/22 SMI" 36static char sccsid[] = "@(#)clnt_dg.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 37#endif 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: stable/10/lib/libc/rpc/clnt_dg.c 309489 2016-12-03 17:40:58Z ngie $"); 40 41/* 42 * Implements a connectionless client side RPC. 43 */ 44 45#include "namespace.h" 46#include "reentrant.h" 47#include <sys/types.h> 48#include <sys/event.h> 49#include <sys/time.h> 50#include <sys/socket.h> 51#include <sys/ioctl.h> 52#include <arpa/inet.h> 53#include <rpc/rpc.h> 54#include <rpc/rpcsec_gss.h> 55#include <errno.h> 56#include <stdlib.h> 57#include <string.h> 58#include <signal.h> 59#include <unistd.h> 60#include <err.h> 61#include "un-namespace.h" 62#include "rpc_com.h" 63#include "mt_misc.h" 64 65 66#ifdef _FREEFALL_CONFIG 67/* 68 * Disable RPC exponential back-off for FreeBSD.org systems. 69 */ 70#define RPC_MAX_BACKOFF 1 /* second */ 71#else 72#define RPC_MAX_BACKOFF 30 /* seconds */ 73#endif 74 75 76static struct clnt_ops *clnt_dg_ops(void); 77static bool_t time_not_ok(struct timeval *); 78static enum clnt_stat clnt_dg_call(CLIENT *, rpcproc_t, xdrproc_t, void *, 79 xdrproc_t, void *, struct timeval); 80static void clnt_dg_geterr(CLIENT *, struct rpc_err *); 81static bool_t clnt_dg_freeres(CLIENT *, xdrproc_t, void *); 82static void clnt_dg_abort(CLIENT *); 83static bool_t clnt_dg_control(CLIENT *, u_int, void *); 84static void clnt_dg_destroy(CLIENT *); 85 86 87 88 89/* 90 * This machinery implements per-fd locks for MT-safety. It is not 91 * sufficient to do per-CLIENT handle locks for MT-safety because a 92 * user may create more than one CLIENT handle with the same fd behind 93 * it. Therfore, we allocate an array of flags (dg_fd_locks), protected 94 * by the clnt_fd_lock mutex, and an array (dg_cv) of condition variables 95 * similarly protected. Dg_fd_lock[fd] == 1 => a call is activte on some 96 * CLIENT handle created for that fd. 97 * The current implementation holds locks across the entire RPC and reply, 98 * including retransmissions. Yes, this is silly, and as soon as this 99 * code is proven to work, this should be the first thing fixed. One step 100 * at a time. 101 */ 102static int *dg_fd_locks; 103static cond_t *dg_cv; 104#define release_fd_lock(fd, mask) { \ 105 mutex_lock(&clnt_fd_lock); \ 106 dg_fd_locks[fd] = 0; \ 107 mutex_unlock(&clnt_fd_lock); \ 108 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); \ 109 cond_signal(&dg_cv[fd]); \ 110} 111 112static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 113 114/* VARIABLES PROTECTED BY clnt_fd_lock: dg_fd_locks, dg_cv */ 115 116#define MCALL_MSG_SIZE 24 117 118/* 119 * Private data kept per client handle 120 */ 121struct cu_data { 122 int cu_fd; /* connections fd */ 123 bool_t cu_closeit; /* opened by library */ 124 struct sockaddr_storage cu_raddr; /* remote address */ 125 int cu_rlen; 126 struct timeval cu_wait; /* retransmit interval */ 127 struct timeval cu_total; /* total time for the call */ 128 struct rpc_err cu_error; 129 XDR cu_outxdrs; 130 u_int cu_xdrpos; 131 u_int cu_sendsz; /* send size */ 132 char cu_outhdr[MCALL_MSG_SIZE]; 133 char *cu_outbuf; 134 u_int cu_recvsz; /* recv size */ 135 int cu_async; 136 int cu_connect; /* Use connect(). */ 137 int cu_connected; /* Have done connect(). */ 138 struct kevent cu_kin; 139 int cu_kq; 140 char cu_inbuf[1]; 141}; 142 143/* 144 * Connection less client creation returns with client handle parameters. 145 * Default options are set, which the user can change using clnt_control(). 146 * fd should be open and bound. 147 * NB: The rpch->cl_auth is initialized to null authentication. 148 * Caller may wish to set this something more useful. 149 * 150 * sendsz and recvsz are the maximum allowable packet sizes that can be 151 * sent and received. Normally they are the same, but they can be 152 * changed to improve the program efficiency and buffer allocation. 153 * If they are 0, use the transport default. 154 * 155 * If svcaddr is NULL, returns NULL. 156 * 157 * fd - open file descriptor 158 * svcaddr - servers address 159 * program - program number 160 * version - version number 161 * sendsz - buffer recv size 162 * recvsz - buffer send size 163 */ 164CLIENT * 165clnt_dg_create(int fd, const struct netbuf *svcaddr, rpcprog_t program, 166 rpcvers_t version, u_int sendsz, u_int recvsz) 167{ 168 CLIENT *cl = NULL; /* client handle */ 169 struct cu_data *cu = NULL; /* private data */ 170 struct timeval now; 171 struct rpc_msg call_msg; 172 sigset_t mask; 173 sigset_t newmask; 174 struct __rpc_sockinfo si; 175 int one = 1; 176 177 sigfillset(&newmask); 178 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 179 mutex_lock(&clnt_fd_lock); 180 if (dg_fd_locks == (int *) NULL) { 181 int cv_allocsz; 182 size_t fd_allocsz; 183 int dtbsize = __rpc_dtbsize(); 184 185 fd_allocsz = dtbsize * sizeof (int); 186 dg_fd_locks = (int *) mem_alloc(fd_allocsz); 187 if (dg_fd_locks == (int *) NULL) { 188 mutex_unlock(&clnt_fd_lock); 189 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 190 goto err1; 191 } else 192 memset(dg_fd_locks, '\0', fd_allocsz); 193 194 cv_allocsz = dtbsize * sizeof (cond_t); 195 dg_cv = (cond_t *) mem_alloc(cv_allocsz); 196 if (dg_cv == (cond_t *) NULL) { 197 mem_free(dg_fd_locks, fd_allocsz); 198 dg_fd_locks = (int *) NULL; 199 mutex_unlock(&clnt_fd_lock); 200 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 201 goto err1; 202 } else { 203 int i; 204 205 for (i = 0; i < dtbsize; i++) 206 cond_init(&dg_cv[i], 0, (void *) 0); 207 } 208 } 209 210 mutex_unlock(&clnt_fd_lock); 211 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 212 213 if (svcaddr == NULL) { 214 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 215 return (NULL); 216 } 217 218 if (!__rpc_fd2sockinfo(fd, &si)) { 219 rpc_createerr.cf_stat = RPC_TLIERROR; 220 rpc_createerr.cf_error.re_errno = 0; 221 return (NULL); 222 } 223 /* 224 * Find the receive and the send size 225 */ 226 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 227 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 228 if ((sendsz == 0) || (recvsz == 0)) { 229 rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 230 rpc_createerr.cf_error.re_errno = 0; 231 return (NULL); 232 } 233 234 if ((cl = mem_alloc(sizeof (CLIENT))) == NULL) 235 goto err1; 236 /* 237 * Should be multiple of 4 for XDR. 238 */ 239 sendsz = ((sendsz + 3) / 4) * 4; 240 recvsz = ((recvsz + 3) / 4) * 4; 241 cu = mem_alloc(sizeof (*cu) + sendsz + recvsz); 242 if (cu == NULL) 243 goto err1; 244 (void) memcpy(&cu->cu_raddr, svcaddr->buf, (size_t)svcaddr->len); 245 cu->cu_rlen = svcaddr->len; 246 cu->cu_outbuf = &cu->cu_inbuf[recvsz]; 247 /* Other values can also be set through clnt_control() */ 248 cu->cu_wait.tv_sec = 15; /* heuristically chosen */ 249 cu->cu_wait.tv_usec = 0; 250 cu->cu_total.tv_sec = -1; 251 cu->cu_total.tv_usec = -1; 252 cu->cu_sendsz = sendsz; 253 cu->cu_recvsz = recvsz; 254 cu->cu_async = FALSE; 255 cu->cu_connect = FALSE; 256 cu->cu_connected = FALSE; 257 (void) gettimeofday(&now, NULL); 258 call_msg.rm_xid = __RPC_GETXID(&now); 259 call_msg.rm_call.cb_prog = program; 260 call_msg.rm_call.cb_vers = version; 261 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outhdr, MCALL_MSG_SIZE, 262 XDR_ENCODE); 263 if (! xdr_callhdr(&cu->cu_outxdrs, &call_msg)) { 264 rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ 265 rpc_createerr.cf_error.re_errno = 0; 266 goto err2; 267 } 268 cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs)); 269 XDR_DESTROY(&cu->cu_outxdrs); 270 xdrmem_create(&cu->cu_outxdrs, cu->cu_outbuf, sendsz, XDR_ENCODE); 271 272 /* XXX fvdl - do we still want this? */ 273#if 0 274 (void)bindresvport_sa(fd, (struct sockaddr *)svcaddr->buf); 275#endif 276 _ioctl(fd, FIONBIO, (char *)(void *)&one); 277 278 /* 279 * By default, closeit is always FALSE. It is users responsibility 280 * to do a close on it, else the user may use clnt_control 281 * to let clnt_destroy do it for him/her. 282 */ 283 cu->cu_closeit = FALSE; 284 cu->cu_fd = fd; 285 cl->cl_ops = clnt_dg_ops(); 286 cl->cl_private = (caddr_t)(void *)cu; 287 cl->cl_auth = authnone_create(); 288 cl->cl_tp = NULL; 289 cl->cl_netid = NULL; 290 cu->cu_kq = -1; 291 EV_SET(&cu->cu_kin, cu->cu_fd, EVFILT_READ, EV_ADD, 0, 0, 0); 292 return (cl); 293err1: 294 warnx(mem_err_clnt_dg); 295 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 296 rpc_createerr.cf_error.re_errno = errno; 297err2: 298 if (cl) { 299 mem_free(cl, sizeof (CLIENT)); 300 if (cu) 301 mem_free(cu, sizeof (*cu) + sendsz + recvsz); 302 } 303 return (NULL); 304} 305 306/* 307 * cl - client handle 308 * proc - procedure number 309 * xargs - xdr routine for args 310 * argsp - pointer to args 311 * xresults - xdr routine for results 312 * resultsp - pointer to results 313 * utimeout - seconds to wait before giving up 314 */ 315static enum clnt_stat 316clnt_dg_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, void *argsp, 317 xdrproc_t xresults, void *resultsp, struct timeval utimeout) 318{ 319 struct cu_data *cu = (struct cu_data *)cl->cl_private; 320 XDR *xdrs; 321 size_t outlen = 0; 322 struct rpc_msg reply_msg; 323 XDR reply_xdrs; 324 bool_t ok; 325 int nrefreshes = 2; /* number of times to refresh cred */ 326 int nretries = 0; /* number of times we retransmitted */ 327 struct timeval timeout; 328 struct timeval retransmit_time; 329 struct timeval next_sendtime, starttime, time_waited, tv; 330 struct timespec ts; 331 struct kevent kv; 332 struct sockaddr *sa; 333 sigset_t mask; 334 sigset_t newmask; 335 socklen_t salen; 336 ssize_t recvlen = 0; 337 int kin_len, n, rpc_lock_value; 338 u_int32_t xid; 339 340 outlen = 0; 341 sigfillset(&newmask); 342 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 343 mutex_lock(&clnt_fd_lock); 344 while (dg_fd_locks[cu->cu_fd]) 345 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 346 if (__isthreaded) 347 rpc_lock_value = 1; 348 else 349 rpc_lock_value = 0; 350 dg_fd_locks[cu->cu_fd] = rpc_lock_value; 351 mutex_unlock(&clnt_fd_lock); 352 if (cu->cu_total.tv_usec == -1) { 353 timeout = utimeout; /* use supplied timeout */ 354 } else { 355 timeout = cu->cu_total; /* use default timeout */ 356 } 357 358 if (cu->cu_connect && !cu->cu_connected) { 359 if (_connect(cu->cu_fd, (struct sockaddr *)&cu->cu_raddr, 360 cu->cu_rlen) < 0) { 361 cu->cu_error.re_errno = errno; 362 cu->cu_error.re_status = RPC_CANTSEND; 363 goto out; 364 } 365 cu->cu_connected = 1; 366 } 367 if (cu->cu_connected) { 368 sa = NULL; 369 salen = 0; 370 } else { 371 sa = (struct sockaddr *)&cu->cu_raddr; 372 salen = cu->cu_rlen; 373 } 374 time_waited.tv_sec = 0; 375 time_waited.tv_usec = 0; 376 retransmit_time = next_sendtime = cu->cu_wait; 377 gettimeofday(&starttime, NULL); 378 379 /* Clean up in case the last call ended in a longjmp(3) call. */ 380 if (cu->cu_kq >= 0) 381 _close(cu->cu_kq); 382 if ((cu->cu_kq = kqueue()) < 0) { 383 cu->cu_error.re_errno = errno; 384 cu->cu_error.re_status = RPC_CANTSEND; 385 goto out; 386 } 387 kin_len = 1; 388 389call_again: 390 if (cu->cu_async == TRUE && xargs == NULL) 391 goto get_reply; 392 /* 393 * the transaction is the first thing in the out buffer 394 * XXX Yes, and it's in network byte order, so we should to 395 * be careful when we increment it, shouldn't we. 396 */ 397 xid = ntohl(*(u_int32_t *)(void *)(cu->cu_outhdr)); 398 xid++; 399 *(u_int32_t *)(void *)(cu->cu_outhdr) = htonl(xid); 400call_again_same_xid: 401 xdrs = &(cu->cu_outxdrs); 402 xdrs->x_op = XDR_ENCODE; 403 XDR_SETPOS(xdrs, 0); 404 405 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 406 if ((! XDR_PUTBYTES(xdrs, cu->cu_outhdr, cu->cu_xdrpos)) || 407 (! XDR_PUTINT32(xdrs, &proc)) || 408 (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || 409 (! (*xargs)(xdrs, argsp))) { 410 cu->cu_error.re_status = RPC_CANTENCODEARGS; 411 goto out; 412 } 413 } else { 414 *(uint32_t *) &cu->cu_outhdr[cu->cu_xdrpos] = htonl(proc); 415 if (!__rpc_gss_wrap(cl->cl_auth, cu->cu_outhdr, 416 cu->cu_xdrpos + sizeof(uint32_t), 417 xdrs, xargs, argsp)) { 418 cu->cu_error.re_status = RPC_CANTENCODEARGS; 419 goto out; 420 } 421 } 422 outlen = (size_t)XDR_GETPOS(xdrs); 423 424send_again: 425 if (_sendto(cu->cu_fd, cu->cu_outbuf, outlen, 0, sa, salen) != outlen) { 426 cu->cu_error.re_errno = errno; 427 cu->cu_error.re_status = RPC_CANTSEND; 428 goto out; 429 } 430 431 /* 432 * Hack to provide rpc-based message passing 433 */ 434 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 435 cu->cu_error.re_status = RPC_TIMEDOUT; 436 goto out; 437 } 438 439get_reply: 440 441 /* 442 * sub-optimal code appears here because we have 443 * some clock time to spare while the packets are in flight. 444 * (We assume that this is actually only executed once.) 445 */ 446 reply_msg.acpted_rply.ar_verf = _null_auth; 447 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 448 reply_msg.acpted_rply.ar_results.where = resultsp; 449 reply_msg.acpted_rply.ar_results.proc = xresults; 450 } else { 451 reply_msg.acpted_rply.ar_results.where = NULL; 452 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 453 } 454 455 for (;;) { 456 /* Decide how long to wait. */ 457 if (timercmp(&next_sendtime, &timeout, <)) 458 timersub(&next_sendtime, &time_waited, &tv); 459 else 460 timersub(&timeout, &time_waited, &tv); 461 if (tv.tv_sec < 0 || tv.tv_usec < 0) 462 tv.tv_sec = tv.tv_usec = 0; 463 TIMEVAL_TO_TIMESPEC(&tv, &ts); 464 465 n = _kevent(cu->cu_kq, &cu->cu_kin, kin_len, &kv, 1, &ts); 466 /* We don't need to register the event again. */ 467 kin_len = 0; 468 469 if (n == 1) { 470 if (kv.flags & EV_ERROR) { 471 cu->cu_error.re_errno = kv.data; 472 cu->cu_error.re_status = RPC_CANTRECV; 473 goto out; 474 } 475 /* We have some data now */ 476 do { 477 recvlen = _recvfrom(cu->cu_fd, cu->cu_inbuf, 478 cu->cu_recvsz, 0, NULL, NULL); 479 } while (recvlen < 0 && errno == EINTR); 480 if (recvlen < 0 && errno != EWOULDBLOCK) { 481 cu->cu_error.re_errno = errno; 482 cu->cu_error.re_status = RPC_CANTRECV; 483 goto out; 484 } 485 if (recvlen >= sizeof(u_int32_t) && 486 (cu->cu_async == TRUE || 487 *((u_int32_t *)(void *)(cu->cu_inbuf)) == 488 *((u_int32_t *)(void *)(cu->cu_outbuf)))) { 489 /* We now assume we have the proper reply. */ 490 break; 491 } 492 } 493 if (n == -1 && errno != EINTR) { 494 cu->cu_error.re_errno = errno; 495 cu->cu_error.re_status = RPC_CANTRECV; 496 goto out; 497 } 498 gettimeofday(&tv, NULL); 499 timersub(&tv, &starttime, &time_waited); 500 501 /* Check for timeout. */ 502 if (timercmp(&time_waited, &timeout, >)) { 503 cu->cu_error.re_status = RPC_TIMEDOUT; 504 goto out; 505 } 506 507 /* Retransmit if necessary. */ 508 if (timercmp(&time_waited, &next_sendtime, >)) { 509 /* update retransmit_time */ 510 if (retransmit_time.tv_sec < RPC_MAX_BACKOFF) 511 timeradd(&retransmit_time, &retransmit_time, 512 &retransmit_time); 513 timeradd(&next_sendtime, &retransmit_time, 514 &next_sendtime); 515 nretries++; 516 517 /* 518 * When retransmitting a RPCSEC_GSS message, 519 * we must use a new sequence number (handled 520 * by __rpc_gss_wrap above). 521 */ 522 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) 523 goto send_again; 524 else 525 goto call_again_same_xid; 526 } 527 } 528 529 /* 530 * now decode and validate the response 531 */ 532 533 xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)recvlen, XDR_DECODE); 534 ok = xdr_replymsg(&reply_xdrs, &reply_msg); 535 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ 536 if (ok) { 537 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 538 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 539 cu->cu_error.re_status = RPC_SUCCESS; 540 else 541 _seterr_reply(&reply_msg, &(cu->cu_error)); 542 543 if (cu->cu_error.re_status == RPC_SUCCESS) { 544 if (! AUTH_VALIDATE(cl->cl_auth, 545 &reply_msg.acpted_rply.ar_verf)) { 546 if (nretries && 547 cl->cl_auth->ah_cred.oa_flavor 548 == RPCSEC_GSS) 549 /* 550 * If we retransmitted, its 551 * possible that we will 552 * receive a reply for one of 553 * the earlier transmissions 554 * (which will use an older 555 * RPCSEC_GSS sequence 556 * number). In this case, just 557 * go back and listen for a 558 * new reply. We could keep a 559 * record of all the seq 560 * numbers we have transmitted 561 * so far so that we could 562 * accept a reply for any of 563 * them here. 564 */ 565 goto get_reply; 566 cu->cu_error.re_status = RPC_AUTHERROR; 567 cu->cu_error.re_why = AUTH_INVALIDRESP; 568 } else { 569 if (cl->cl_auth->ah_cred.oa_flavor 570 == RPCSEC_GSS) { 571 if (!__rpc_gss_unwrap(cl->cl_auth, 572 &reply_xdrs, xresults, 573 resultsp)) 574 cu->cu_error.re_status = 575 RPC_CANTDECODERES; 576 } 577 } 578 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 579 xdrs->x_op = XDR_FREE; 580 (void) xdr_opaque_auth(xdrs, 581 &(reply_msg.acpted_rply.ar_verf)); 582 } 583 } /* end successful completion */ 584 /* 585 * If unsuccesful AND error is an authentication error 586 * then refresh credentials and try again, else break 587 */ 588 else if (cu->cu_error.re_status == RPC_AUTHERROR) 589 /* maybe our credentials need to be refreshed ... */ 590 if (nrefreshes > 0 && 591 AUTH_REFRESH(cl->cl_auth, &reply_msg)) { 592 nrefreshes--; 593 goto call_again; 594 } 595 /* end of unsuccessful completion */ 596 } /* end of valid reply message */ 597 else { 598 cu->cu_error.re_status = RPC_CANTDECODERES; 599 600 } 601out: 602 if (cu->cu_kq >= 0) 603 _close(cu->cu_kq); 604 cu->cu_kq = -1; 605 release_fd_lock(cu->cu_fd, mask); 606 return (cu->cu_error.re_status); 607} 608 609static void 610clnt_dg_geterr(CLIENT *cl, struct rpc_err *errp) 611{ 612 struct cu_data *cu = (struct cu_data *)cl->cl_private; 613 614 *errp = cu->cu_error; 615} 616 617static bool_t 618clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 619{ 620 struct cu_data *cu = (struct cu_data *)cl->cl_private; 621 XDR *xdrs = &(cu->cu_outxdrs); 622 bool_t dummy; 623 sigset_t mask; 624 sigset_t newmask; 625 626 sigfillset(&newmask); 627 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 628 mutex_lock(&clnt_fd_lock); 629 while (dg_fd_locks[cu->cu_fd]) 630 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 631 xdrs->x_op = XDR_FREE; 632 dummy = (*xdr_res)(xdrs, res_ptr); 633 mutex_unlock(&clnt_fd_lock); 634 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 635 cond_signal(&dg_cv[cu->cu_fd]); 636 return (dummy); 637} 638 639/*ARGSUSED*/ 640static void 641clnt_dg_abort(CLIENT *h) 642{ 643} 644 645static bool_t 646clnt_dg_control(CLIENT *cl, u_int request, void *info) 647{ 648 struct cu_data *cu = (struct cu_data *)cl->cl_private; 649 struct netbuf *addr; 650 sigset_t mask; 651 sigset_t newmask; 652 int rpc_lock_value; 653 654 sigfillset(&newmask); 655 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 656 mutex_lock(&clnt_fd_lock); 657 while (dg_fd_locks[cu->cu_fd]) 658 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 659 if (__isthreaded) 660 rpc_lock_value = 1; 661 else 662 rpc_lock_value = 0; 663 dg_fd_locks[cu->cu_fd] = rpc_lock_value; 664 mutex_unlock(&clnt_fd_lock); 665 switch (request) { 666 case CLSET_FD_CLOSE: 667 cu->cu_closeit = TRUE; 668 release_fd_lock(cu->cu_fd, mask); 669 return (TRUE); 670 case CLSET_FD_NCLOSE: 671 cu->cu_closeit = FALSE; 672 release_fd_lock(cu->cu_fd, mask); 673 return (TRUE); 674 } 675 676 /* for other requests which use info */ 677 if (info == NULL) { 678 release_fd_lock(cu->cu_fd, mask); 679 return (FALSE); 680 } 681 switch (request) { 682 case CLSET_TIMEOUT: 683 if (time_not_ok((struct timeval *)info)) { 684 release_fd_lock(cu->cu_fd, mask); 685 return (FALSE); 686 } 687 cu->cu_total = *(struct timeval *)info; 688 break; 689 case CLGET_TIMEOUT: 690 *(struct timeval *)info = cu->cu_total; 691 break; 692 case CLGET_SERVER_ADDR: /* Give him the fd address */ 693 /* Now obsolete. Only for backward compatibility */ 694 (void) memcpy(info, &cu->cu_raddr, (size_t)cu->cu_rlen); 695 break; 696 case CLSET_RETRY_TIMEOUT: 697 if (time_not_ok((struct timeval *)info)) { 698 release_fd_lock(cu->cu_fd, mask); 699 return (FALSE); 700 } 701 cu->cu_wait = *(struct timeval *)info; 702 break; 703 case CLGET_RETRY_TIMEOUT: 704 *(struct timeval *)info = cu->cu_wait; 705 break; 706 case CLGET_FD: 707 *(int *)info = cu->cu_fd; 708 break; 709 case CLGET_SVC_ADDR: 710 addr = (struct netbuf *)info; 711 addr->buf = &cu->cu_raddr; 712 addr->len = cu->cu_rlen; 713 addr->maxlen = sizeof cu->cu_raddr; 714 break; 715 case CLSET_SVC_ADDR: /* set to new address */ 716 addr = (struct netbuf *)info; 717 if (addr->len < sizeof cu->cu_raddr) { 718 release_fd_lock(cu->cu_fd, mask); 719 return (FALSE); 720 } 721 (void) memcpy(&cu->cu_raddr, addr->buf, addr->len); 722 cu->cu_rlen = addr->len; 723 break; 724 case CLGET_XID: 725 /* 726 * use the knowledge that xid is the 727 * first element in the call structure *. 728 * This will get the xid of the PREVIOUS call 729 */ 730 *(u_int32_t *)info = 731 ntohl(*(u_int32_t *)(void *)cu->cu_outhdr); 732 break; 733 734 case CLSET_XID: 735 /* This will set the xid of the NEXT call */ 736 *(u_int32_t *)(void *)cu->cu_outhdr = 737 htonl(*(u_int32_t *)info - 1); 738 /* decrement by 1 as clnt_dg_call() increments once */ 739 break; 740 741 case CLGET_VERS: 742 /* 743 * This RELIES on the information that, in the call body, 744 * the version number field is the fifth field from the 745 * begining of the RPC header. MUST be changed if the 746 * call_struct is changed 747 */ 748 *(u_int32_t *)info = 749 ntohl(*(u_int32_t *)(void *)(cu->cu_outhdr + 750 4 * BYTES_PER_XDR_UNIT)); 751 break; 752 753 case CLSET_VERS: 754 *(u_int32_t *)(void *)(cu->cu_outhdr + 4 * BYTES_PER_XDR_UNIT) 755 = htonl(*(u_int32_t *)info); 756 break; 757 758 case CLGET_PROG: 759 /* 760 * This RELIES on the information that, in the call body, 761 * the program number field is the fourth field from the 762 * begining of the RPC header. MUST be changed if the 763 * call_struct is changed 764 */ 765 *(u_int32_t *)info = 766 ntohl(*(u_int32_t *)(void *)(cu->cu_outhdr + 767 3 * BYTES_PER_XDR_UNIT)); 768 break; 769 770 case CLSET_PROG: 771 *(u_int32_t *)(void *)(cu->cu_outhdr + 3 * BYTES_PER_XDR_UNIT) 772 = htonl(*(u_int32_t *)info); 773 break; 774 case CLSET_ASYNC: 775 cu->cu_async = *(int *)info; 776 break; 777 case CLSET_CONNECT: 778 cu->cu_connect = *(int *)info; 779 break; 780 default: 781 release_fd_lock(cu->cu_fd, mask); 782 return (FALSE); 783 } 784 release_fd_lock(cu->cu_fd, mask); 785 return (TRUE); 786} 787 788static void 789clnt_dg_destroy(CLIENT *cl) 790{ 791 struct cu_data *cu = (struct cu_data *)cl->cl_private; 792 int cu_fd = cu->cu_fd; 793 sigset_t mask; 794 sigset_t newmask; 795 796 sigfillset(&newmask); 797 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 798 mutex_lock(&clnt_fd_lock); 799 while (dg_fd_locks[cu_fd]) 800 cond_wait(&dg_cv[cu_fd], &clnt_fd_lock); 801 if (cu->cu_closeit) 802 (void)_close(cu_fd); 803 if (cu->cu_kq >= 0) 804 _close(cu->cu_kq); 805 XDR_DESTROY(&(cu->cu_outxdrs)); 806 mem_free(cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); 807 if (cl->cl_netid && cl->cl_netid[0]) 808 mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 809 if (cl->cl_tp && cl->cl_tp[0]) 810 mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 811 mem_free(cl, sizeof (CLIENT)); 812 mutex_unlock(&clnt_fd_lock); 813 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 814 cond_signal(&dg_cv[cu_fd]); 815} 816 817static struct clnt_ops * 818clnt_dg_ops(void) 819{ 820 static struct clnt_ops ops; 821 sigset_t mask; 822 sigset_t newmask; 823 824/* VARIABLES PROTECTED BY ops_lock: ops */ 825 826 sigfillset(&newmask); 827 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 828 mutex_lock(&ops_lock); 829 if (ops.cl_call == NULL) { 830 ops.cl_call = clnt_dg_call; 831 ops.cl_abort = clnt_dg_abort; 832 ops.cl_geterr = clnt_dg_geterr; 833 ops.cl_freeres = clnt_dg_freeres; 834 ops.cl_destroy = clnt_dg_destroy; 835 ops.cl_control = clnt_dg_control; 836 } 837 mutex_unlock(&ops_lock); 838 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 839 return (&ops); 840} 841 842/* 843 * Make sure that the time is not garbage. -1 value is allowed. 844 */ 845static bool_t 846time_not_ok(struct timeval *t) 847{ 848 return (t->tv_sec < -1 || t->tv_sec > 100000000 || 849 t->tv_usec < -1 || t->tv_usec > 1000000); 850} 851 852