clnt_vc.c revision 1.2.4.2
1 /* $NetBSD: clnt_vc.c,v 1.2.4.2 2000/06/23 16:17:42 minoura Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 37 static char sccsid[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 38 #else 39 __RCSID("$NetBSD: clnt_vc.c,v 1.2.4.2 2000/06/23 16:17:42 minoura Exp $"); 40 #endif 41 #endif 42 43 /* 44 * clnt_tcp.c, Implements a TCP/IP based, client side RPC. 45 * 46 * Copyright (C) 1984, Sun Microsystems, Inc. 47 * 48 * TCP based RPC supports 'batched calls'. 49 * A sequence of calls may be batched-up in a send buffer. The rpc call 50 * return immediately to the client even though the call was not necessarily 51 * sent. The batching occurs if the results' xdr routine is NULL (0) AND 52 * the rpc timeout value is zero (see clnt.h, rpc). 53 * 54 * Clients should NOT casually batch calls that in fact return results; that is, 55 * the server side should be aware that a call is batched and not produce any 56 * return message. Batched calls that produce many result messages can 57 * deadlock (netlock) the client and the server.... 58 * 59 * Now go hang yourself. 60 */ 61 62 #include "namespace.h" 63 #include "reentrant.h" 64 #include <sys/types.h> 65 #include <sys/poll.h> 66 #include <sys/socket.h> 67 68 #include <assert.h> 69 #include <err.h> 70 #include <errno.h> 71 #include <netdb.h> 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <unistd.h> 76 #include <signal.h> 77 78 #include <rpc/rpc.h> 79 80 #include "rpc_com.h" 81 82 #ifdef __weak_alias 83 __weak_alias(clnt_vc_create,_clnt_vc_create) 84 #endif 85 86 #define MCALL_MSG_SIZE 24 87 88 static enum clnt_stat clnt_vc_call __P((CLIENT *, rpcproc_t, xdrproc_t, caddr_t, 89 xdrproc_t, caddr_t, struct timeval)); 90 static void clnt_vc_geterr __P((CLIENT *, struct rpc_err *)); 91 static bool_t clnt_vc_freeres __P((CLIENT *, xdrproc_t, caddr_t)); 92 static void clnt_vc_abort __P((CLIENT *)); 93 static bool_t clnt_vc_control __P((CLIENT *, u_int, char *)); 94 static void clnt_vc_destroy __P((CLIENT *)); 95 static struct clnt_ops *clnt_vc_ops __P((void)); 96 static bool_t time_not_ok __P((struct timeval *)); 97 static int read_vc __P((caddr_t, caddr_t, int)); 98 static int write_vc __P((caddr_t, caddr_t, int)); 99 100 struct ct_data { 101 int ct_fd; 102 bool_t ct_closeit; 103 struct timeval ct_wait; 104 bool_t ct_waitset; /* wait set by clnt_control? */ 105 struct netbuf ct_addr; 106 struct rpc_err ct_error; 107 union { 108 char ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */ 109 u_int32_t ct_mcalli; 110 } ct_u; 111 u_int ct_mpos; /* pos after marshal */ 112 XDR ct_xdrs; 113 }; 114 115 /* 116 * This machinery implements per-fd locks for MT-safety. It is not 117 * sufficient to do per-CLIENT handle locks for MT-safety because a 118 * user may create more than one CLIENT handle with the same fd behind 119 * it. Therfore, we allocate an array of flags (vc_fd_locks), protected 120 * by the clnt_fd_lock mutex, and an array (vc_cv) of condition variables 121 * similarly protected. Vc_fd_lock[fd] == 1 => a call is activte on some 122 * CLIENT handle created for that fd. 123 * The current implementation holds locks across the entire RPC and reply. 124 * Yes, this is silly, and as soon as this code is proven to work, this 125 * should be the first thing fixed. One step at a time. 126 */ 127 #ifdef __REENT 128 static int *vc_fd_locks; 129 extern int __rpc_lock_value; 130 extern mutex_t clnt_fd_lock; 131 static cond_t *vc_cv; 132 #define release_fd_lock(fd, mask) { \ 133 mutex_lock(&clnt_fd_lock); \ 134 vc_fd_locks[fd] = 0; \ 135 mutex_unlock(&clnt_fd_lock); \ 136 thr_sigsetmask(SIG_SETMASK, &(mask), (sigset_t *) NULL); \ 137 cond_signal(&vc_cv[fd]); \ 138 } 139 #else 140 #define release_fd_lock(fd,mask) 141 #define __rpc_lock_value 0 142 #endif 143 144 145 /* 146 * Create a client handle for a connection. 147 * Default options are set, which the user can change using clnt_control()'s. 148 * The rpc/vc package does buffering similar to stdio, so the client 149 * must pick send and receive buffer sizes, 0 => use the default. 150 * NB: fd is copied into a private area. 151 * NB: The rpch->cl_auth is set null authentication. Caller may wish to 152 * set this something more useful. 153 * 154 * fd should be an open socket 155 */ 156 CLIENT * 157 clnt_vc_create(fd, raddr, prog, vers, sendsz, recvsz) 158 int fd; 159 const struct netbuf *raddr; 160 rpcprog_t prog; 161 rpcvers_t vers; 162 u_int sendsz; 163 u_int recvsz; 164 { 165 CLIENT *h; 166 struct ct_data *ct = NULL; 167 struct timeval now; 168 struct rpc_msg call_msg; 169 static u_int32_t disrupt; 170 #ifdef __REENT 171 sigset_t mask; 172 #endif 173 sigset_t newmask; 174 struct sockaddr_storage ss; 175 socklen_t slen; 176 struct __rpc_sockinfo si; 177 178 if (disrupt == 0) 179 disrupt = (u_int32_t)(long)raddr; 180 181 h = (CLIENT *)mem_alloc(sizeof(*h)); 182 if (h == NULL) { 183 warnx("clnt_vc_create: out of memory"); 184 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 185 rpc_createerr.cf_error.re_errno = errno; 186 goto fooy; 187 } 188 ct = (struct ct_data *)mem_alloc(sizeof(*ct)); 189 if (ct == NULL) { 190 warnx("clnt_vc_create: out of memory"); 191 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 192 rpc_createerr.cf_error.re_errno = errno; 193 goto fooy; 194 } 195 196 sigfillset(&newmask); 197 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 198 #ifdef __REENT 199 mutex_lock(&clnt_fd_lock); 200 if (vc_fd_locks == (int *) NULL) { 201 int cv_allocsz, fd_allocsz; 202 int dtbsize = __rpc_dtbsize(); 203 204 fd_allocsz = dtbsize * sizeof (int); 205 vc_fd_locks = (int *) mem_alloc(fd_allocsz); 206 if (vc_fd_locks == (int *) NULL) { 207 mutex_unlock(&clnt_fd_lock); 208 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 209 goto fooy; 210 } else 211 memset(vc_fd_locks, '\0', fd_allocsz); 212 213 assert(vc_cv == (cond_t *) NULL); 214 cv_allocsz = dtbsize * sizeof (cond_t); 215 vc_cv = (cond_t *) mem_alloc(cv_allocsz); 216 if (vc_cv == (cond_t *) NULL) { 217 mem_free(vc_fd_locks, fd_allocsz); 218 vc_fd_locks = (int *) NULL; 219 mutex_unlock(&clnt_fd_lock); 220 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 221 goto fooy; 222 } else { 223 int i; 224 225 for (i = 0; i < dtbsize; i++) 226 cond_init(&vc_cv[i], 0, (void *) 0); 227 } 228 } else 229 assert(vc_cv != (cond_t *) NULL); 230 #endif 231 232 /* 233 * XXX - fvdl connecting while holding a mutex? 234 */ 235 slen = sizeof ss; 236 if (getpeername(fd, (struct sockaddr *)&ss, &slen) < 0) { 237 if (errno != ENOTCONN) { 238 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 239 rpc_createerr.cf_error.re_errno = errno; 240 mutex_unlock(&clnt_fd_lock); 241 goto fooy; 242 } 243 if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){ 244 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 245 rpc_createerr.cf_error.re_errno = errno; 246 mutex_unlock(&clnt_fd_lock); 247 goto fooy; 248 } 249 } 250 mutex_unlock(&clnt_fd_lock); 251 if (!__rpc_fd2sockinfo(fd, &si)) 252 goto fooy; 253 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 254 255 ct->ct_closeit = FALSE; 256 257 /* 258 * Set up private data struct 259 */ 260 ct->ct_fd = fd; 261 ct->ct_wait.tv_usec = 0; 262 ct->ct_waitset = FALSE; 263 ct->ct_addr.buf = malloc(raddr->maxlen); 264 if (ct->ct_addr.buf == NULL) 265 goto fooy; 266 memcpy(ct->ct_addr.buf, &raddr->buf, raddr->len); 267 ct->ct_addr.len = raddr->maxlen; 268 ct->ct_addr.maxlen = raddr->maxlen; 269 270 /* 271 * Initialize call message 272 */ 273 (void)gettimeofday(&now, (struct timezone *)0); 274 call_msg.rm_xid = 275 (u_int32_t)((++disrupt) ^ getpid() ^ now.tv_sec ^ now.tv_usec); 276 call_msg.rm_direction = CALL; 277 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 278 call_msg.rm_call.cb_prog = (u_int32_t)prog; 279 call_msg.rm_call.cb_vers = (u_int32_t)vers; 280 281 /* 282 * pre-serialize the static part of the call msg and stash it away 283 */ 284 xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE, 285 XDR_ENCODE); 286 if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) { 287 if (ct->ct_closeit) { 288 (void)close(fd); 289 } 290 goto fooy; 291 } 292 ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs)); 293 XDR_DESTROY(&(ct->ct_xdrs)); 294 295 /* 296 * Create a client handle which uses xdrrec for serialization 297 * and authnone for authentication. 298 */ 299 h->cl_ops = clnt_vc_ops(); 300 h->cl_private = ct; 301 h->cl_auth = authnone_create(); 302 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 303 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 304 xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz, 305 h->cl_private, read_vc, write_vc); 306 return (h); 307 308 fooy: 309 /* 310 * Something goofed, free stuff and barf 311 */ 312 if (ct) 313 mem_free(ct, sizeof(struct ct_data)); 314 if (h) 315 mem_free(h, sizeof(CLIENT)); 316 return ((CLIENT *)NULL); 317 } 318 319 static enum clnt_stat 320 clnt_vc_call(h, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout) 321 CLIENT *h; 322 rpcproc_t proc; 323 xdrproc_t xdr_args; 324 caddr_t args_ptr; 325 xdrproc_t xdr_results; 326 caddr_t results_ptr; 327 struct timeval timeout; 328 { 329 struct ct_data *ct; 330 XDR *xdrs; 331 struct rpc_msg reply_msg; 332 u_int32_t x_id; 333 u_int32_t *msg_x_id; 334 bool_t shipnow; 335 int refreshes = 2; 336 #ifdef __REENT 337 sigset_t mask, newmask; 338 #endif 339 340 _DIAGASSERT(h != NULL); 341 342 #ifdef __REENT 343 sigfillset(&newmask); 344 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 345 mutex_lock(&clnt_fd_lock); 346 while (vc_fd_locks[ct->ct_fd]) 347 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 348 vc_fd_locks[ct->ct_fd] = lock_value; 349 mutex_unlock(&clnt_fd_lock); 350 #endif 351 352 ct = (struct ct_data *) h->cl_private; 353 xdrs = &(ct->ct_xdrs); 354 msg_x_id = &ct->ct_u.ct_mcalli; 355 356 if (!ct->ct_waitset) { 357 if (time_not_ok(&timeout) == FALSE) 358 ct->ct_wait = timeout; 359 } 360 361 shipnow = 362 (xdr_results == (xdrproc_t)0 && timeout.tv_sec == 0 363 && timeout.tv_usec == 0) ? FALSE : TRUE; 364 365 call_again: 366 xdrs->x_op = XDR_ENCODE; 367 ct->ct_error.re_status = RPC_SUCCESS; 368 x_id = ntohl(--(*msg_x_id)); 369 if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) || 370 (! XDR_PUTLONG(xdrs, (long *)&proc)) || 371 (! AUTH_MARSHALL(h->cl_auth, xdrs)) || 372 (! (*xdr_args)(xdrs, args_ptr))) { 373 if (ct->ct_error.re_status == RPC_SUCCESS) 374 ct->ct_error.re_status = RPC_CANTENCODEARGS; 375 (void)xdrrec_endofrecord(xdrs, TRUE); 376 release_fd_lock(ct->ct_fd, mask); 377 return (ct->ct_error.re_status); 378 } 379 if (! xdrrec_endofrecord(xdrs, shipnow)) { 380 release_fd_lock(ct->ct_fd, mask); 381 return (ct->ct_error.re_status = RPC_CANTSEND); 382 } 383 if (! shipnow) { 384 release_fd_lock(ct->ct_fd, mask); 385 return (RPC_SUCCESS); 386 } 387 /* 388 * Hack to provide rpc-based message passing 389 */ 390 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 391 release_fd_lock(ct->ct_fd, mask); 392 return(ct->ct_error.re_status = RPC_TIMEDOUT); 393 } 394 395 396 /* 397 * Keep receiving until we get a valid transaction id 398 */ 399 xdrs->x_op = XDR_DECODE; 400 for (;;) { 401 reply_msg.acpted_rply.ar_verf = _null_auth; 402 reply_msg.acpted_rply.ar_results.where = NULL; 403 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 404 if (! xdrrec_skiprecord(xdrs)) { 405 release_fd_lock(ct->ct_fd, mask); 406 return (ct->ct_error.re_status); 407 } 408 /* now decode and validate the response header */ 409 if (! xdr_replymsg(xdrs, &reply_msg)) { 410 if (ct->ct_error.re_status == RPC_SUCCESS) 411 continue; 412 release_fd_lock(ct->ct_fd, mask); 413 return (ct->ct_error.re_status); 414 } 415 if (reply_msg.rm_xid == x_id) 416 break; 417 } 418 419 /* 420 * process header 421 */ 422 _seterr_reply(&reply_msg, &(ct->ct_error)); 423 if (ct->ct_error.re_status == RPC_SUCCESS) { 424 if (! AUTH_VALIDATE(h->cl_auth, 425 &reply_msg.acpted_rply.ar_verf)) { 426 ct->ct_error.re_status = RPC_AUTHERROR; 427 ct->ct_error.re_why = AUTH_INVALIDRESP; 428 } else if (! (*xdr_results)(xdrs, results_ptr)) { 429 if (ct->ct_error.re_status == RPC_SUCCESS) 430 ct->ct_error.re_status = RPC_CANTDECODERES; 431 } 432 /* free verifier ... */ 433 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 434 xdrs->x_op = XDR_FREE; 435 (void)xdr_opaque_auth(xdrs, 436 &(reply_msg.acpted_rply.ar_verf)); 437 } 438 } /* end successful completion */ 439 else { 440 /* maybe our credentials need to be refreshed ... */ 441 if (refreshes-- && AUTH_REFRESH(h->cl_auth)) 442 goto call_again; 443 } /* end of unsuccessful completion */ 444 release_fd_lock(ct->ct_fd, mask); 445 return (ct->ct_error.re_status); 446 } 447 448 static void 449 clnt_vc_geterr(h, errp) 450 CLIENT *h; 451 struct rpc_err *errp; 452 { 453 struct ct_data *ct; 454 455 _DIAGASSERT(h != NULL); 456 _DIAGASSERT(errp != NULL); 457 458 ct = (struct ct_data *) h->cl_private; 459 *errp = ct->ct_error; 460 } 461 462 static bool_t 463 clnt_vc_freeres(cl, xdr_res, res_ptr) 464 CLIENT *cl; 465 xdrproc_t xdr_res; 466 caddr_t res_ptr; 467 { 468 struct ct_data *ct; 469 XDR *xdrs; 470 bool_t dummy; 471 #ifdef __REENT 472 sigset_t mask; 473 #endif 474 sigset_t newmask; 475 476 _DIAGASSERT(cl != NULL); 477 478 ct = (struct ct_data *)cl->cl_private; 479 xdrs = &(ct->ct_xdrs); 480 481 sigfillset(&newmask); 482 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 483 mutex_lock(&clnt_fd_lock); 484 #ifdef __REENT 485 while (vc_fd_locks[ct->ct_fd]) 486 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 487 #endif 488 489 xdrs->x_op = XDR_FREE; 490 dummy = (*xdr_res)(xdrs, res_ptr); 491 mutex_unlock(&clnt_fd_lock); 492 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 493 cond_signal(&vc_cv[ct->ct_fd]); 494 495 return dummy; 496 } 497 498 /*ARGSUSED*/ 499 static void 500 clnt_vc_abort(cl) 501 CLIENT *cl; 502 { 503 } 504 505 static bool_t 506 clnt_vc_control(cl, request, info) 507 CLIENT *cl; 508 u_int request; 509 char *info; 510 { 511 struct ct_data *ct; 512 void *infop = info; 513 #ifdef _REENT 514 sigset_t mask; 515 #endif 516 sigset_t newmask; 517 518 _DIAGASSERT(cl != NULL); 519 520 ct = (struct ct_data *)cl->cl_private; 521 522 sigfillset(&newmask); 523 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 524 mutex_lock(&clnt_fd_lock); 525 #ifdef __REENT 526 while (vc_fd_locks[ct->ct_fd]) 527 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 528 vc_fd_locks[ct->ct_fd] = __rpc_lock_value; 529 #endif 530 mutex_unlock(&clnt_fd_lock); 531 532 switch (request) { 533 case CLSET_FD_CLOSE: 534 ct->ct_closeit = TRUE; 535 release_fd_lock(ct->ct_fd, mask); 536 return (TRUE); 537 case CLSET_FD_NCLOSE: 538 ct->ct_closeit = FALSE; 539 release_fd_lock(ct->ct_fd, mask); 540 return (TRUE); 541 default: 542 break; 543 } 544 545 /* for other requests which use info */ 546 if (info == NULL) { 547 release_fd_lock(ct->ct_fd, mask); 548 return (FALSE); 549 } 550 switch (request) { 551 case CLSET_TIMEOUT: 552 if (time_not_ok((struct timeval *)info)) { 553 release_fd_lock(ct->ct_fd, mask); 554 return (FALSE); 555 } 556 ct->ct_wait = *(struct timeval *)infop; 557 ct->ct_waitset = TRUE; 558 break; 559 case CLGET_TIMEOUT: 560 *(struct timeval *)infop = ct->ct_wait; 561 break; 562 case CLGET_SERVER_ADDR: 563 (void) memcpy(info, ct->ct_addr.buf, (int)ct->ct_addr.len); 564 break; 565 case CLGET_FD: 566 *(int *)info = ct->ct_fd; 567 break; 568 case CLGET_SVC_ADDR: 569 /* The caller should not free this memory area */ 570 *(struct netbuf *)info = ct->ct_addr; 571 break; 572 case CLSET_SVC_ADDR: /* set to new address */ 573 release_fd_lock(ct->ct_fd, mask); 574 return (FALSE); 575 case CLGET_XID: 576 /* 577 * use the knowledge that xid is the 578 * first element in the call structure 579 * This will get the xid of the PREVIOUS call 580 */ 581 *(u_int32_t *)info = ntohl(*(u_int32_t *)&ct->ct_u.ct_mcalli); 582 break; 583 case CLSET_XID: 584 /* This will set the xid of the NEXT call */ 585 *(u_int32_t *)&ct->ct_u.ct_mcalli = 586 htonl(*(u_int32_t *)info + 1); 587 /* increment by 1 as clnt_vc_call() decrements once */ 588 break; 589 case CLGET_VERS: 590 /* 591 * This RELIES on the information that, in the call body, 592 * the version number field is the fifth field from the 593 * begining of the RPC header. MUST be changed if the 594 * call_struct is changed 595 */ 596 *(u_int32_t *)info = ntohl(*(u_int32_t *)(ct->ct_u.ct_mcallc + 597 4 * BYTES_PER_XDR_UNIT)); 598 break; 599 600 case CLSET_VERS: 601 *(u_int32_t *)(ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT) = 602 htonl(*(u_int32_t *)info); 603 break; 604 605 case CLGET_PROG: 606 /* 607 * This RELIES on the information that, in the call body, 608 * the program number field is the fourth field from the 609 * begining of the RPC header. MUST be changed if the 610 * call_struct is changed 611 */ 612 *(u_int32_t *)info = ntohl(*(u_int32_t *)(ct->ct_u.ct_mcallc + 613 3 * BYTES_PER_XDR_UNIT)); 614 break; 615 616 case CLSET_PROG: 617 *(u_int32_t *)(ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT) = 618 htonl(*(u_int32_t *)info); 619 break; 620 621 default: 622 release_fd_lock(ct->ct_fd, mask); 623 return (FALSE); 624 } 625 release_fd_lock(ct->ct_fd, mask); 626 return (TRUE); 627 } 628 629 630 static void 631 clnt_vc_destroy(cl) 632 CLIENT *cl; 633 { 634 struct ct_data *ct; 635 #ifdef __REENT 636 int ct_fd = ct->ct_fd; 637 sigset_t mask; 638 #endif 639 sigset_t newmask; 640 641 _DIAGASSERT(cl != NULL); 642 643 ct = (struct ct_data *) cl->cl_private; 644 645 sigfillset(&newmask); 646 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 647 mutex_lock(&clnt_fd_lock); 648 #ifdef _REENT 649 while (vc_fd_locks[ct_fd]) 650 cond_wait(&vc_cv[ct_fd], &clnt_fd_lock); 651 #endif 652 if (ct->ct_closeit && ct->ct_fd != -1) { 653 (void)close(ct->ct_fd); 654 } 655 XDR_DESTROY(&(ct->ct_xdrs)); 656 if (ct->ct_addr.buf) 657 free(ct->ct_addr.buf); 658 mem_free(ct, sizeof(struct ct_data)); 659 mem_free(cl, sizeof(CLIENT)); 660 mutex_unlock(&clnt_fd_lock); 661 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 662 663 cond_signal(&vc_cv[ct_fd]); 664 } 665 666 /* 667 * Interface between xdr serializer and tcp connection. 668 * Behaves like the system calls, read & write, but keeps some error state 669 * around for the rpc level. 670 */ 671 static int 672 read_vc(ctp, buf, len) 673 caddr_t ctp; 674 caddr_t buf; 675 int len; 676 { 677 struct ct_data *ct = (struct ct_data *)(void *)ctp; 678 struct pollfd fd; 679 int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) + 680 (ct->ct_wait.tv_usec / 1000)); 681 682 if (len == 0) 683 return (0); 684 fd.fd = ct->ct_fd; 685 fd.events = POLLIN; 686 for (;;) { 687 switch (poll(&fd, 1, milliseconds)) { 688 case 0: 689 ct->ct_error.re_status = RPC_TIMEDOUT; 690 return (-1); 691 692 case -1: 693 if (errno == EINTR) 694 continue; 695 ct->ct_error.re_status = RPC_CANTRECV; 696 ct->ct_error.re_errno = errno; 697 return (-1); 698 } 699 break; 700 } 701 switch (len = read(ct->ct_fd, buf, (size_t)len)) { 702 703 case 0: 704 /* premature eof */ 705 ct->ct_error.re_errno = ECONNRESET; 706 ct->ct_error.re_status = RPC_CANTRECV; 707 len = -1; /* it's really an error */ 708 break; 709 710 case -1: 711 ct->ct_error.re_errno = errno; 712 ct->ct_error.re_status = RPC_CANTRECV; 713 break; 714 } 715 return (len); 716 } 717 718 static int 719 write_vc(ctp, buf, len) 720 caddr_t ctp; 721 caddr_t buf; 722 int len; 723 { 724 struct ct_data *ct = (struct ct_data *)(void *)ctp; 725 int i, cnt; 726 727 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 728 if ((i = write(ct->ct_fd, buf, (size_t)cnt)) == -1) { 729 ct->ct_error.re_errno = errno; 730 ct->ct_error.re_status = RPC_CANTSEND; 731 return (-1); 732 } 733 } 734 return (len); 735 } 736 737 static struct clnt_ops * 738 clnt_vc_ops() 739 { 740 static struct clnt_ops ops; 741 #ifdef __REENT 742 extern mutex_t ops_lock; 743 sigset_t mask; 744 #endif 745 sigset_t newmask; 746 747 /* VARIABLES PROTECTED BY ops_lock: ops */ 748 749 sigfillset(&newmask); 750 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 751 mutex_lock(&ops_lock); 752 if (ops.cl_call == NULL) { 753 ops.cl_call = clnt_vc_call; 754 ops.cl_abort = clnt_vc_abort; 755 ops.cl_geterr = clnt_vc_geterr; 756 ops.cl_freeres = clnt_vc_freeres; 757 ops.cl_destroy = clnt_vc_destroy; 758 ops.cl_control = clnt_vc_control; 759 } 760 mutex_unlock(&ops_lock); 761 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 762 return (&ops); 763 } 764 765 /* 766 * Make sure that the time is not garbage. -1 value is disallowed. 767 * Note this is different from time_not_ok in clnt_dg.c 768 */ 769 static bool_t 770 time_not_ok(t) 771 struct timeval *t; 772 { 773 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 774 t->tv_usec <= -1 || t->tv_usec > 1000000); 775 } 776
Indexes created Thu Oct 02 10:09:58 GMT 2025