clnt_vc.c revision 1.15.8.2
1 /* $NetBSD: clnt_vc.c,v 1.15.8.2 2008/04/25 17:44:45 christos 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 1.15.8.2 2008/04/25 17:44:45 christos 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_internal.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, 89 const char *, 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 _REENTRANT 128 static int *vc_fd_locks; 129 extern int __isthreaded; 130 #define __rpc_lock_value __isthreaded; 131 extern mutex_t clnt_fd_lock; 132 static cond_t *vc_cv; 133 #define release_fd_lock(fd, mask) { \ 134 mutex_lock(&clnt_fd_lock); \ 135 vc_fd_locks[fd] = 0; \ 136 mutex_unlock(&clnt_fd_lock); \ 137 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); \ 138 cond_signal(&vc_cv[fd]); \ 139 } 140 #else 141 #define release_fd_lock(fd,mask) 142 #define __rpc_lock_value 0 143 #endif 144 145 146 /* 147 * Create a client handle for a connection. 148 * Default options are set, which the user can change using clnt_control()'s. 149 * The rpc/vc package does buffering similar to stdio, so the client 150 * must pick send and receive buffer sizes, 0 => use the default. 151 * NB: fd is copied into a private area. 152 * NB: The rpch->cl_auth is set null authentication. Caller may wish to 153 * set this something more useful. 154 * 155 * fd should be an open socket 156 */ 157 CLIENT * 158 clnt_vc_create(fd, raddr, prog, vers, sendsz, recvsz) 159 int fd; 160 const struct netbuf *raddr; 161 rpcprog_t prog; 162 rpcvers_t vers; 163 u_int sendsz; 164 u_int recvsz; 165 { 166 CLIENT *h; 167 struct ct_data *ct = NULL; 168 struct rpc_msg call_msg; 169 #ifdef _REENTRANT 170 sigset_t mask; 171 #endif 172 sigset_t newmask; 173 struct sockaddr_storage ss; 174 socklen_t slen; 175 struct __rpc_sockinfo si; 176 177 _DIAGASSERT(raddr != NULL); 178 179 h = mem_alloc(sizeof(*h)); 180 if (h == NULL) { 181 warnx("clnt_vc_create: out of memory"); 182 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 183 rpc_createerr.cf_error.re_errno = errno; 184 goto fooy; 185 } 186 ct = mem_alloc(sizeof(*ct)); 187 if (ct == NULL) { 188 warnx("clnt_vc_create: out of memory"); 189 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 190 rpc_createerr.cf_error.re_errno = errno; 191 goto fooy; 192 } 193 194 sigfillset(&newmask); 195 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 196 #ifdef _REENTRANT 197 mutex_lock(&clnt_fd_lock); 198 if (vc_fd_locks == NULL) { 199 size_t cv_allocsz, fd_allocsz; 200 int dtbsize = __rpc_dtbsize(); 201 202 fd_allocsz = dtbsize * sizeof (int); 203 vc_fd_locks = mem_alloc(fd_allocsz); 204 if (vc_fd_locks == NULL) { 205 mutex_unlock(&clnt_fd_lock); 206 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 207 goto fooy; 208 } else 209 memset(vc_fd_locks, '\0', fd_allocsz); 210 211 assert(vc_cv == NULL); 212 cv_allocsz = dtbsize * sizeof (cond_t); 213 vc_cv = mem_alloc(cv_allocsz); 214 if (vc_cv == NULL) { 215 mem_free(vc_fd_locks, fd_allocsz); 216 vc_fd_locks = NULL; 217 mutex_unlock(&clnt_fd_lock); 218 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 219 goto fooy; 220 } else { 221 int i; 222 223 for (i = 0; i < dtbsize; i++) 224 cond_init(&vc_cv[i], 0, (void *) 0); 225 } 226 } else 227 assert(vc_cv != NULL); 228 #endif 229 230 /* 231 * XXX - fvdl connecting while holding a mutex? 232 */ 233 slen = sizeof ss; 234 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 235 if (errno != ENOTCONN) { 236 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 237 rpc_createerr.cf_error.re_errno = errno; 238 mutex_unlock(&clnt_fd_lock); 239 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 240 goto fooy; 241 } 242 if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){ 243 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 244 rpc_createerr.cf_error.re_errno = errno; 245 mutex_unlock(&clnt_fd_lock); 246 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 247 goto fooy; 248 } 249 } 250 mutex_unlock(&clnt_fd_lock); 251 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 252 if (!__rpc_fd2sockinfo(fd, &si)) 253 goto fooy; 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((size_t)raddr->maxlen); 264 if (ct->ct_addr.buf == NULL) 265 goto fooy; 266 memcpy(ct->ct_addr.buf, &raddr->buf, (size_t)raddr->len); 267 ct->ct_addr.len = raddr->maxlen; 268 ct->ct_addr.maxlen = raddr->maxlen; 269 270 /* 271 * Initialize call message 272 */ 273 call_msg.rm_xid = __RPC_GETXID(); 274 call_msg.rm_direction = CALL; 275 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 276 call_msg.rm_call.cb_prog = (u_int32_t)prog; 277 call_msg.rm_call.cb_vers = (u_int32_t)vers; 278 279 /* 280 * pre-serialize the static part of the call msg and stash it away 281 */ 282 xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE, 283 XDR_ENCODE); 284 if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) { 285 if (ct->ct_closeit) { 286 (void)close(fd); 287 } 288 goto fooy; 289 } 290 ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs)); 291 XDR_DESTROY(&(ct->ct_xdrs)); 292 293 /* 294 * Create a client handle which uses xdrrec for serialization 295 * and authnone for authentication. 296 */ 297 h->cl_ops = clnt_vc_ops(); 298 h->cl_private = ct; 299 h->cl_auth = authnone_create(); 300 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 301 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 302 xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz, 303 h->cl_private, read_vc, write_vc); 304 return (h); 305 306 fooy: 307 /* 308 * Something goofed, free stuff and barf 309 */ 310 if (ct) 311 mem_free(ct, sizeof(struct ct_data)); 312 if (h) 313 mem_free(h, sizeof(CLIENT)); 314 return (NULL); 315 } 316 317 static enum clnt_stat 318 clnt_vc_call(h, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout) 319 CLIENT *h; 320 rpcproc_t proc; 321 xdrproc_t xdr_args; 322 const char *args_ptr; 323 xdrproc_t xdr_results; 324 caddr_t results_ptr; 325 struct timeval timeout; 326 { 327 struct ct_data *ct; 328 XDR *xdrs; 329 struct rpc_msg reply_msg; 330 u_int32_t x_id; 331 u_int32_t *msg_x_id; 332 bool_t shipnow; 333 int refreshes = 2; 334 #ifdef _REENTRANT 335 sigset_t mask, newmask; 336 #endif 337 338 _DIAGASSERT(h != NULL); 339 340 ct = (struct ct_data *) h->cl_private; 341 342 #ifdef _REENTRANT 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] = __rpc_lock_value; 349 mutex_unlock(&clnt_fd_lock); 350 #endif 351 352 xdrs = &(ct->ct_xdrs); 353 msg_x_id = &ct->ct_u.ct_mcalli; 354 355 if (!ct->ct_waitset) { 356 if (time_not_ok(&timeout) == FALSE) 357 ct->ct_wait = timeout; 358 } 359 360 shipnow = 361 (xdr_results == NULL && timeout.tv_sec == 0 362 && timeout.tv_usec == 0) ? FALSE : TRUE; 363 364 call_again: 365 xdrs->x_op = XDR_ENCODE; 366 ct->ct_error.re_status = RPC_SUCCESS; 367 x_id = ntohl(--(*msg_x_id)); 368 if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) || 369 (! XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 370 (! AUTH_MARSHALL(h->cl_auth, xdrs)) || 371 (! (*xdr_args)(xdrs, __UNCONST(args_ptr)))) { 372 if (ct->ct_error.re_status == RPC_SUCCESS) 373 ct->ct_error.re_status = RPC_CANTENCODEARGS; 374 (void)xdrrec_endofrecord(xdrs, TRUE); 375 release_fd_lock(ct->ct_fd, mask); 376 return (ct->ct_error.re_status); 377 } 378 if (! xdrrec_endofrecord(xdrs, shipnow)) { 379 release_fd_lock(ct->ct_fd, mask); 380 return (ct->ct_error.re_status = RPC_CANTSEND); 381 } 382 if (! shipnow) { 383 release_fd_lock(ct->ct_fd, mask); 384 return (RPC_SUCCESS); 385 } 386 /* 387 * Hack to provide rpc-based message passing 388 */ 389 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 390 release_fd_lock(ct->ct_fd, mask); 391 return(ct->ct_error.re_status = RPC_TIMEDOUT); 392 } 393 394 395 /* 396 * Keep receiving until we get a valid transaction id 397 */ 398 xdrs->x_op = XDR_DECODE; 399 for (;;) { 400 reply_msg.acpted_rply.ar_verf = _null_auth; 401 reply_msg.acpted_rply.ar_results.where = NULL; 402 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 403 if (! xdrrec_skiprecord(xdrs)) { 404 release_fd_lock(ct->ct_fd, mask); 405 return (ct->ct_error.re_status); 406 } 407 /* now decode and validate the response header */ 408 if (! xdr_replymsg(xdrs, &reply_msg)) { 409 if (ct->ct_error.re_status == RPC_SUCCESS) 410 continue; 411 release_fd_lock(ct->ct_fd, mask); 412 return (ct->ct_error.re_status); 413 } 414 if (reply_msg.rm_xid == x_id) 415 break; 416 } 417 418 /* 419 * process header 420 */ 421 _seterr_reply(&reply_msg, &(ct->ct_error)); 422 if (ct->ct_error.re_status == RPC_SUCCESS) { 423 if (! AUTH_VALIDATE(h->cl_auth, 424 &reply_msg.acpted_rply.ar_verf)) { 425 ct->ct_error.re_status = RPC_AUTHERROR; 426 ct->ct_error.re_why = AUTH_INVALIDRESP; 427 } else if (! (*xdr_results)(xdrs, results_ptr)) { 428 if (ct->ct_error.re_status == RPC_SUCCESS) 429 ct->ct_error.re_status = RPC_CANTDECODERES; 430 } 431 /* free verifier ... */ 432 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 433 xdrs->x_op = XDR_FREE; 434 (void)xdr_opaque_auth(xdrs, 435 &(reply_msg.acpted_rply.ar_verf)); 436 } 437 } /* end successful completion */ 438 else { 439 /* maybe our credentials need to be refreshed ... */ 440 if (refreshes-- && AUTH_REFRESH(h->cl_auth)) 441 goto call_again; 442 } /* end of unsuccessful completion */ 443 release_fd_lock(ct->ct_fd, mask); 444 return (ct->ct_error.re_status); 445 } 446 447 static void 448 clnt_vc_geterr(h, errp) 449 CLIENT *h; 450 struct rpc_err *errp; 451 { 452 struct ct_data *ct; 453 454 _DIAGASSERT(h != NULL); 455 _DIAGASSERT(errp != NULL); 456 457 ct = (struct ct_data *) h->cl_private; 458 *errp = ct->ct_error; 459 } 460 461 static bool_t 462 clnt_vc_freeres(cl, xdr_res, res_ptr) 463 CLIENT *cl; 464 xdrproc_t xdr_res; 465 caddr_t res_ptr; 466 { 467 struct ct_data *ct; 468 XDR *xdrs; 469 bool_t dummy; 470 #ifdef _REENTRANT 471 sigset_t mask; 472 #endif 473 sigset_t newmask; 474 475 _DIAGASSERT(cl != NULL); 476 477 ct = (struct ct_data *)cl->cl_private; 478 xdrs = &(ct->ct_xdrs); 479 480 sigfillset(&newmask); 481 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 482 mutex_lock(&clnt_fd_lock); 483 #ifdef _REENTRANT 484 while (vc_fd_locks[ct->ct_fd]) 485 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 486 #endif 487 488 xdrs->x_op = XDR_FREE; 489 dummy = (*xdr_res)(xdrs, res_ptr); 490 mutex_unlock(&clnt_fd_lock); 491 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 492 cond_signal(&vc_cv[ct->ct_fd]); 493 494 return dummy; 495 } 496 497 /*ARGSUSED*/ 498 static void 499 clnt_vc_abort(cl) 500 CLIENT *cl; 501 { 502 } 503 504 static bool_t 505 clnt_vc_control(cl, request, info) 506 CLIENT *cl; 507 u_int request; 508 char *info; 509 { 510 struct ct_data *ct; 511 void *infop = info; 512 #ifdef _REENTRANT 513 sigset_t mask; 514 #endif 515 sigset_t newmask; 516 517 _DIAGASSERT(cl != NULL); 518 519 ct = (struct ct_data *)cl->cl_private; 520 521 sigfillset(&newmask); 522 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 523 mutex_lock(&clnt_fd_lock); 524 #ifdef _REENTRANT 525 while (vc_fd_locks[ct->ct_fd]) 526 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 527 vc_fd_locks[ct->ct_fd] = __rpc_lock_value; 528 #endif 529 mutex_unlock(&clnt_fd_lock); 530 531 switch (request) { 532 case CLSET_FD_CLOSE: 533 ct->ct_closeit = TRUE; 534 release_fd_lock(ct->ct_fd, mask); 535 return (TRUE); 536 case CLSET_FD_NCLOSE: 537 ct->ct_closeit = FALSE; 538 release_fd_lock(ct->ct_fd, mask); 539 return (TRUE); 540 default: 541 break; 542 } 543 544 /* for other requests which use info */ 545 if (info == NULL) { 546 release_fd_lock(ct->ct_fd, mask); 547 return (FALSE); 548 } 549 switch (request) { 550 case CLSET_TIMEOUT: 551 if (time_not_ok((struct timeval *)(void *)info)) { 552 release_fd_lock(ct->ct_fd, mask); 553 return (FALSE); 554 } 555 ct->ct_wait = *(struct timeval *)infop; 556 ct->ct_waitset = TRUE; 557 break; 558 case CLGET_TIMEOUT: 559 *(struct timeval *)infop = ct->ct_wait; 560 break; 561 case CLGET_SERVER_ADDR: 562 (void) memcpy(info, ct->ct_addr.buf, (size_t)ct->ct_addr.len); 563 break; 564 case CLGET_FD: 565 *(int *)(void *)info = ct->ct_fd; 566 break; 567 case CLGET_SVC_ADDR: 568 /* The caller should not free this memory area */ 569 *(struct netbuf *)(void *)info = ct->ct_addr; 570 break; 571 case CLSET_SVC_ADDR: /* set to new address */ 572 release_fd_lock(ct->ct_fd, mask); 573 return (FALSE); 574 case CLGET_XID: 575 /* 576 * use the knowledge that xid is the 577 * first element in the call structure 578 * This will get the xid of the PREVIOUS call 579 */ 580 *(u_int32_t *)(void *)info = 581 ntohl(*(u_int32_t *)(void *)&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 *)(void *)&ct->ct_u.ct_mcalli = 586 htonl(*((u_int32_t *)(void *)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 *)(void *)info = 597 ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 598 4 * BYTES_PER_XDR_UNIT)); 599 break; 600 601 case CLSET_VERS: 602 *(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 603 4 * BYTES_PER_XDR_UNIT) = 604 htonl(*(u_int32_t *)(void *)info); 605 break; 606 607 case CLGET_PROG: 608 /* 609 * This RELIES on the information that, in the call body, 610 * the program number field is the fourth field from the 611 * begining of the RPC header. MUST be changed if the 612 * call_struct is changed 613 */ 614 *(u_int32_t *)(void *)info = 615 ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 616 3 * BYTES_PER_XDR_UNIT)); 617 break; 618 619 case CLSET_PROG: 620 *(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 621 3 * BYTES_PER_XDR_UNIT) = 622 htonl(*(u_int32_t *)(void *)info); 623 break; 624 625 default: 626 release_fd_lock(ct->ct_fd, mask); 627 return (FALSE); 628 } 629 release_fd_lock(ct->ct_fd, mask); 630 return (TRUE); 631 } 632 633 634 static void 635 clnt_vc_destroy(cl) 636 CLIENT *cl; 637 { 638 struct ct_data *ct; 639 #ifdef _REENTRANT 640 int ct_fd; 641 sigset_t mask; 642 #endif 643 sigset_t newmask; 644 645 _DIAGASSERT(cl != NULL); 646 647 ct = (struct ct_data *) cl->cl_private; 648 ct_fd = ct->ct_fd; 649 650 sigfillset(&newmask); 651 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 652 mutex_lock(&clnt_fd_lock); 653 #ifdef _REENTRANT 654 while (vc_fd_locks[ct_fd]) 655 cond_wait(&vc_cv[ct_fd], &clnt_fd_lock); 656 #endif 657 if (ct->ct_closeit && ct->ct_fd != -1) { 658 (void)close(ct->ct_fd); 659 } 660 XDR_DESTROY(&(ct->ct_xdrs)); 661 if (ct->ct_addr.buf) 662 free(ct->ct_addr.buf); 663 mem_free(ct, sizeof(struct ct_data)); 664 mem_free(cl, sizeof(CLIENT)); 665 mutex_unlock(&clnt_fd_lock); 666 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 667 668 cond_signal(&vc_cv[ct_fd]); 669 } 670 671 /* 672 * Interface between xdr serializer and tcp connection. 673 * Behaves like the system calls, read & write, but keeps some error state 674 * around for the rpc level. 675 */ 676 static int 677 read_vc(ctp, buf, len) 678 caddr_t ctp; 679 caddr_t buf; 680 int len; 681 { 682 struct ct_data *ct = (struct ct_data *)(void *)ctp; 683 struct pollfd fd; 684 struct timespec ts; 685 686 if (len == 0) 687 return (0); 688 689 TIMEVAL_TO_TIMESPEC(&ct->ct_wait, &ts); 690 fd.fd = ct->ct_fd; 691 fd.events = POLLIN; 692 for (;;) { 693 switch (pollts(&fd, 1, &ts, NULL)) { 694 case 0: 695 ct->ct_error.re_status = RPC_TIMEDOUT; 696 return (-1); 697 698 case -1: 699 if (errno == EINTR) 700 continue; 701 ct->ct_error.re_status = RPC_CANTRECV; 702 ct->ct_error.re_errno = errno; 703 return (-1); 704 } 705 break; 706 } 707 switch (len = read(ct->ct_fd, buf, (size_t)len)) { 708 709 case 0: 710 /* premature eof */ 711 ct->ct_error.re_errno = ECONNRESET; 712 ct->ct_error.re_status = RPC_CANTRECV; 713 len = -1; /* it's really an error */ 714 break; 715 716 case -1: 717 ct->ct_error.re_errno = errno; 718 ct->ct_error.re_status = RPC_CANTRECV; 719 break; 720 } 721 return (len); 722 } 723 724 static int 725 write_vc(ctp, buf, len) 726 caddr_t ctp; 727 caddr_t buf; 728 int len; 729 { 730 struct ct_data *ct = (struct ct_data *)(void *)ctp; 731 int i, cnt; 732 733 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 734 if ((i = write(ct->ct_fd, buf, (size_t)cnt)) == -1) { 735 ct->ct_error.re_errno = errno; 736 ct->ct_error.re_status = RPC_CANTSEND; 737 return (-1); 738 } 739 } 740 return (len); 741 } 742 743 static struct clnt_ops * 744 clnt_vc_ops() 745 { 746 static struct clnt_ops ops; 747 #ifdef _REENTRANT 748 extern mutex_t ops_lock; 749 sigset_t mask; 750 #endif 751 sigset_t newmask; 752 753 /* VARIABLES PROTECTED BY ops_lock: ops */ 754 755 sigfillset(&newmask); 756 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 757 mutex_lock(&ops_lock); 758 if (ops.cl_call == NULL) { 759 ops.cl_call = clnt_vc_call; 760 ops.cl_abort = clnt_vc_abort; 761 ops.cl_geterr = clnt_vc_geterr; 762 ops.cl_freeres = clnt_vc_freeres; 763 ops.cl_destroy = clnt_vc_destroy; 764 ops.cl_control = clnt_vc_control; 765 } 766 mutex_unlock(&ops_lock); 767 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 768 return (&ops); 769 } 770 771 /* 772 * Make sure that the time is not garbage. -1 value is disallowed. 773 * Note this is different from time_not_ok in clnt_dg.c 774 */ 775 static bool_t 776 time_not_ok(t) 777 struct timeval *t; 778 { 779 780 _DIAGASSERT(t != NULL); 781 782 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 783 t->tv_usec <= -1 || t->tv_usec > 1000000); 784 } 785
Indexes created Thu Oct 02 10:09:58 GMT 2025