clnt_vc.c revision 1.10
1 /* $NetBSD: clnt_vc.c,v 1.10 2003/09/09 00:22:17 itojun 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 1.10 2003/09/09 00:22:17 itojun 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, 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 _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), (sigset_t *) 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 == (int *) NULL) { 199 size_t cv_allocsz, fd_allocsz; 200 int dtbsize = __rpc_dtbsize(); 201 202 fd_allocsz = dtbsize * sizeof (int); 203 vc_fd_locks = (int *) mem_alloc(fd_allocsz); 204 if (vc_fd_locks == (int *) 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 == (cond_t *) NULL); 212 cv_allocsz = dtbsize * sizeof (cond_t); 213 vc_cv = (cond_t *) mem_alloc(cv_allocsz); 214 if (vc_cv == (cond_t *) NULL) { 215 mem_free(vc_fd_locks, fd_allocsz); 216 vc_fd_locks = (int *) 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 != (cond_t *) 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 goto fooy; 240 } 241 if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){ 242 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 243 rpc_createerr.cf_error.re_errno = errno; 244 mutex_unlock(&clnt_fd_lock); 245 goto fooy; 246 } 247 } 248 mutex_unlock(&clnt_fd_lock); 249 if (!__rpc_fd2sockinfo(fd, &si)) 250 goto fooy; 251 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 252 253 ct->ct_closeit = FALSE; 254 255 /* 256 * Set up private data struct 257 */ 258 ct->ct_fd = fd; 259 ct->ct_wait.tv_usec = 0; 260 ct->ct_waitset = FALSE; 261 ct->ct_addr.buf = malloc(raddr->maxlen); 262 if (ct->ct_addr.buf == NULL) 263 goto fooy; 264 memcpy(ct->ct_addr.buf, &raddr->buf, raddr->len); 265 ct->ct_addr.len = raddr->maxlen; 266 ct->ct_addr.maxlen = raddr->maxlen; 267 268 /* 269 * Initialize call message 270 */ 271 call_msg.rm_xid = __RPC_GETXID(); 272 call_msg.rm_direction = CALL; 273 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 274 call_msg.rm_call.cb_prog = (u_int32_t)prog; 275 call_msg.rm_call.cb_vers = (u_int32_t)vers; 276 277 /* 278 * pre-serialize the static part of the call msg and stash it away 279 */ 280 xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE, 281 XDR_ENCODE); 282 if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) { 283 if (ct->ct_closeit) { 284 (void)close(fd); 285 } 286 goto fooy; 287 } 288 ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs)); 289 XDR_DESTROY(&(ct->ct_xdrs)); 290 291 /* 292 * Create a client handle which uses xdrrec for serialization 293 * and authnone for authentication. 294 */ 295 h->cl_ops = clnt_vc_ops(); 296 h->cl_private = ct; 297 h->cl_auth = authnone_create(); 298 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 299 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 300 xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz, 301 h->cl_private, read_vc, write_vc); 302 return (h); 303 304 fooy: 305 /* 306 * Something goofed, free stuff and barf 307 */ 308 if (ct) 309 mem_free(ct, sizeof(struct ct_data)); 310 if (h) 311 mem_free(h, sizeof(CLIENT)); 312 return (NULL); 313 } 314 315 static enum clnt_stat 316 clnt_vc_call(h, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout) 317 CLIENT *h; 318 rpcproc_t proc; 319 xdrproc_t xdr_args; 320 caddr_t args_ptr; 321 xdrproc_t xdr_results; 322 caddr_t results_ptr; 323 struct timeval timeout; 324 { 325 struct ct_data *ct; 326 XDR *xdrs; 327 struct rpc_msg reply_msg; 328 u_int32_t x_id; 329 u_int32_t *msg_x_id; 330 bool_t shipnow; 331 int refreshes = 2; 332 #ifdef _REENTRANT 333 sigset_t mask, newmask; 334 #endif 335 336 _DIAGASSERT(h != NULL); 337 338 ct = (struct ct_data *) h->cl_private; 339 340 #ifdef _REENTRANT 341 sigfillset(&newmask); 342 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 343 mutex_lock(&clnt_fd_lock); 344 while (vc_fd_locks[ct->ct_fd]) 345 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 346 vc_fd_locks[ct->ct_fd] = __rpc_lock_value; 347 mutex_unlock(&clnt_fd_lock); 348 #endif 349 350 xdrs = &(ct->ct_xdrs); 351 msg_x_id = &ct->ct_u.ct_mcalli; 352 353 if (!ct->ct_waitset) { 354 if (time_not_ok(&timeout) == FALSE) 355 ct->ct_wait = timeout; 356 } 357 358 shipnow = 359 (xdr_results == NULL && timeout.tv_sec == 0 360 && timeout.tv_usec == 0) ? FALSE : TRUE; 361 362 call_again: 363 xdrs->x_op = XDR_ENCODE; 364 ct->ct_error.re_status = RPC_SUCCESS; 365 x_id = ntohl(--(*msg_x_id)); 366 if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) || 367 (! XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 368 (! AUTH_MARSHALL(h->cl_auth, xdrs)) || 369 (! (*xdr_args)(xdrs, args_ptr))) { 370 if (ct->ct_error.re_status == RPC_SUCCESS) 371 ct->ct_error.re_status = RPC_CANTENCODEARGS; 372 (void)xdrrec_endofrecord(xdrs, TRUE); 373 release_fd_lock(ct->ct_fd, mask); 374 return (ct->ct_error.re_status); 375 } 376 if (! xdrrec_endofrecord(xdrs, shipnow)) { 377 release_fd_lock(ct->ct_fd, mask); 378 return (ct->ct_error.re_status = RPC_CANTSEND); 379 } 380 if (! shipnow) { 381 release_fd_lock(ct->ct_fd, mask); 382 return (RPC_SUCCESS); 383 } 384 /* 385 * Hack to provide rpc-based message passing 386 */ 387 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 388 release_fd_lock(ct->ct_fd, mask); 389 return(ct->ct_error.re_status = RPC_TIMEDOUT); 390 } 391 392 393 /* 394 * Keep receiving until we get a valid transaction id 395 */ 396 xdrs->x_op = XDR_DECODE; 397 for (;;) { 398 reply_msg.acpted_rply.ar_verf = _null_auth; 399 reply_msg.acpted_rply.ar_results.where = NULL; 400 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 401 if (! xdrrec_skiprecord(xdrs)) { 402 release_fd_lock(ct->ct_fd, mask); 403 return (ct->ct_error.re_status); 404 } 405 /* now decode and validate the response header */ 406 if (! xdr_replymsg(xdrs, &reply_msg)) { 407 if (ct->ct_error.re_status == RPC_SUCCESS) 408 continue; 409 release_fd_lock(ct->ct_fd, mask); 410 return (ct->ct_error.re_status); 411 } 412 if (reply_msg.rm_xid == x_id) 413 break; 414 } 415 416 /* 417 * process header 418 */ 419 _seterr_reply(&reply_msg, &(ct->ct_error)); 420 if (ct->ct_error.re_status == RPC_SUCCESS) { 421 if (! AUTH_VALIDATE(h->cl_auth, 422 &reply_msg.acpted_rply.ar_verf)) { 423 ct->ct_error.re_status = RPC_AUTHERROR; 424 ct->ct_error.re_why = AUTH_INVALIDRESP; 425 } else if (! (*xdr_results)(xdrs, results_ptr)) { 426 if (ct->ct_error.re_status == RPC_SUCCESS) 427 ct->ct_error.re_status = RPC_CANTDECODERES; 428 } 429 /* free verifier ... */ 430 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 431 xdrs->x_op = XDR_FREE; 432 (void)xdr_opaque_auth(xdrs, 433 &(reply_msg.acpted_rply.ar_verf)); 434 } 435 } /* end successful completion */ 436 else { 437 /* maybe our credentials need to be refreshed ... */ 438 if (refreshes-- && AUTH_REFRESH(h->cl_auth)) 439 goto call_again; 440 } /* end of unsuccessful completion */ 441 release_fd_lock(ct->ct_fd, mask); 442 return (ct->ct_error.re_status); 443 } 444 445 static void 446 clnt_vc_geterr(h, errp) 447 CLIENT *h; 448 struct rpc_err *errp; 449 { 450 struct ct_data *ct; 451 452 _DIAGASSERT(h != NULL); 453 _DIAGASSERT(errp != NULL); 454 455 ct = (struct ct_data *) h->cl_private; 456 *errp = ct->ct_error; 457 } 458 459 static bool_t 460 clnt_vc_freeres(cl, xdr_res, res_ptr) 461 CLIENT *cl; 462 xdrproc_t xdr_res; 463 caddr_t res_ptr; 464 { 465 struct ct_data *ct; 466 XDR *xdrs; 467 bool_t dummy; 468 #ifdef _REENTRANT 469 sigset_t mask; 470 #endif 471 sigset_t newmask; 472 473 _DIAGASSERT(cl != NULL); 474 475 ct = (struct ct_data *)cl->cl_private; 476 xdrs = &(ct->ct_xdrs); 477 478 sigfillset(&newmask); 479 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 480 mutex_lock(&clnt_fd_lock); 481 #ifdef _REENTRANT 482 while (vc_fd_locks[ct->ct_fd]) 483 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 484 #endif 485 486 xdrs->x_op = XDR_FREE; 487 dummy = (*xdr_res)(xdrs, res_ptr); 488 mutex_unlock(&clnt_fd_lock); 489 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 490 cond_signal(&vc_cv[ct->ct_fd]); 491 492 return dummy; 493 } 494 495 /*ARGSUSED*/ 496 static void 497 clnt_vc_abort(cl) 498 CLIENT *cl; 499 { 500 } 501 502 static bool_t 503 clnt_vc_control(cl, request, info) 504 CLIENT *cl; 505 u_int request; 506 char *info; 507 { 508 struct ct_data *ct; 509 void *infop = info; 510 #ifdef _REENTRANT 511 sigset_t mask; 512 #endif 513 sigset_t newmask; 514 515 _DIAGASSERT(cl != NULL); 516 517 ct = (struct ct_data *)cl->cl_private; 518 519 sigfillset(&newmask); 520 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 521 mutex_lock(&clnt_fd_lock); 522 #ifdef _REENTRANT 523 while (vc_fd_locks[ct->ct_fd]) 524 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 525 vc_fd_locks[ct->ct_fd] = __rpc_lock_value; 526 #endif 527 mutex_unlock(&clnt_fd_lock); 528 529 switch (request) { 530 case CLSET_FD_CLOSE: 531 ct->ct_closeit = TRUE; 532 release_fd_lock(ct->ct_fd, mask); 533 return (TRUE); 534 case CLSET_FD_NCLOSE: 535 ct->ct_closeit = FALSE; 536 release_fd_lock(ct->ct_fd, mask); 537 return (TRUE); 538 default: 539 break; 540 } 541 542 /* for other requests which use info */ 543 if (info == NULL) { 544 release_fd_lock(ct->ct_fd, mask); 545 return (FALSE); 546 } 547 switch (request) { 548 case CLSET_TIMEOUT: 549 if (time_not_ok((struct timeval *)(void *)info)) { 550 release_fd_lock(ct->ct_fd, mask); 551 return (FALSE); 552 } 553 ct->ct_wait = *(struct timeval *)infop; 554 ct->ct_waitset = TRUE; 555 break; 556 case CLGET_TIMEOUT: 557 *(struct timeval *)infop = ct->ct_wait; 558 break; 559 case CLGET_SERVER_ADDR: 560 (void) memcpy(info, ct->ct_addr.buf, (size_t)ct->ct_addr.len); 561 break; 562 case CLGET_FD: 563 *(int *)(void *)info = ct->ct_fd; 564 break; 565 case CLGET_SVC_ADDR: 566 /* The caller should not free this memory area */ 567 *(struct netbuf *)(void *)info = ct->ct_addr; 568 break; 569 case CLSET_SVC_ADDR: /* set to new address */ 570 release_fd_lock(ct->ct_fd, mask); 571 return (FALSE); 572 case CLGET_XID: 573 /* 574 * use the knowledge that xid is the 575 * first element in the call structure 576 * This will get the xid of the PREVIOUS call 577 */ 578 *(u_int32_t *)(void *)info = 579 ntohl(*(u_int32_t *)(void *)&ct->ct_u.ct_mcalli); 580 break; 581 case CLSET_XID: 582 /* This will set the xid of the NEXT call */ 583 *(u_int32_t *)(void *)&ct->ct_u.ct_mcalli = 584 htonl(*((u_int32_t *)(void *)info) + 1); 585 /* increment by 1 as clnt_vc_call() decrements once */ 586 break; 587 case CLGET_VERS: 588 /* 589 * This RELIES on the information that, in the call body, 590 * the version number field is the fifth field from the 591 * begining of the RPC header. MUST be changed if the 592 * call_struct is changed 593 */ 594 *(u_int32_t *)(void *)info = 595 ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 596 4 * BYTES_PER_XDR_UNIT)); 597 break; 598 599 case CLSET_VERS: 600 *(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 601 4 * BYTES_PER_XDR_UNIT) = 602 htonl(*(u_int32_t *)(void *)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 *)(void *)info = 613 ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 614 3 * BYTES_PER_XDR_UNIT)); 615 break; 616 617 case CLSET_PROG: 618 *(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 619 3 * BYTES_PER_XDR_UNIT) = 620 htonl(*(u_int32_t *)(void *)info); 621 break; 622 623 default: 624 release_fd_lock(ct->ct_fd, mask); 625 return (FALSE); 626 } 627 release_fd_lock(ct->ct_fd, mask); 628 return (TRUE); 629 } 630 631 632 static void 633 clnt_vc_destroy(cl) 634 CLIENT *cl; 635 { 636 struct ct_data *ct; 637 #ifdef _REENTRANT 638 int ct_fd; 639 sigset_t mask; 640 #endif 641 sigset_t newmask; 642 643 _DIAGASSERT(cl != NULL); 644 645 ct = (struct ct_data *) cl->cl_private; 646 ct_fd = ct->ct_fd; 647 648 sigfillset(&newmask); 649 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 650 mutex_lock(&clnt_fd_lock); 651 #ifdef _REENTRANT 652 while (vc_fd_locks[ct_fd]) 653 cond_wait(&vc_cv[ct_fd], &clnt_fd_lock); 654 #endif 655 if (ct->ct_closeit && ct->ct_fd != -1) { 656 (void)close(ct->ct_fd); 657 } 658 XDR_DESTROY(&(ct->ct_xdrs)); 659 if (ct->ct_addr.buf) 660 free(ct->ct_addr.buf); 661 mem_free(ct, sizeof(struct ct_data)); 662 mem_free(cl, sizeof(CLIENT)); 663 mutex_unlock(&clnt_fd_lock); 664 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 665 666 cond_signal(&vc_cv[ct_fd]); 667 } 668 669 /* 670 * Interface between xdr serializer and tcp connection. 671 * Behaves like the system calls, read & write, but keeps some error state 672 * around for the rpc level. 673 */ 674 static int 675 read_vc(ctp, buf, len) 676 caddr_t ctp; 677 caddr_t buf; 678 int len; 679 { 680 struct ct_data *ct = (struct ct_data *)(void *)ctp; 681 struct pollfd fd; 682 int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) + 683 (ct->ct_wait.tv_usec / 1000)); 684 685 if (len == 0) 686 return (0); 687 fd.fd = ct->ct_fd; 688 fd.events = POLLIN; 689 for (;;) { 690 switch (poll(&fd, 1, milliseconds)) { 691 case 0: 692 ct->ct_error.re_status = RPC_TIMEDOUT; 693 return (-1); 694 695 case -1: 696 if (errno == EINTR) 697 continue; 698 ct->ct_error.re_status = RPC_CANTRECV; 699 ct->ct_error.re_errno = errno; 700 return (-1); 701 } 702 break; 703 } 704 switch (len = read(ct->ct_fd, buf, (size_t)len)) { 705 706 case 0: 707 /* premature eof */ 708 ct->ct_error.re_errno = ECONNRESET; 709 ct->ct_error.re_status = RPC_CANTRECV; 710 len = -1; /* it's really an error */ 711 break; 712 713 case -1: 714 ct->ct_error.re_errno = errno; 715 ct->ct_error.re_status = RPC_CANTRECV; 716 break; 717 } 718 return (len); 719 } 720 721 static int 722 write_vc(ctp, buf, len) 723 caddr_t ctp; 724 caddr_t buf; 725 int len; 726 { 727 struct ct_data *ct = (struct ct_data *)(void *)ctp; 728 int i, cnt; 729 730 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 731 if ((i = write(ct->ct_fd, buf, (size_t)cnt)) == -1) { 732 ct->ct_error.re_errno = errno; 733 ct->ct_error.re_status = RPC_CANTSEND; 734 return (-1); 735 } 736 } 737 return (len); 738 } 739 740 static struct clnt_ops * 741 clnt_vc_ops() 742 { 743 static struct clnt_ops ops; 744 #ifdef _REENTRANT 745 extern mutex_t ops_lock; 746 sigset_t mask; 747 #endif 748 sigset_t newmask; 749 750 /* VARIABLES PROTECTED BY ops_lock: ops */ 751 752 sigfillset(&newmask); 753 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 754 mutex_lock(&ops_lock); 755 if (ops.cl_call == NULL) { 756 ops.cl_call = clnt_vc_call; 757 ops.cl_abort = clnt_vc_abort; 758 ops.cl_geterr = clnt_vc_geterr; 759 ops.cl_freeres = clnt_vc_freeres; 760 ops.cl_destroy = clnt_vc_destroy; 761 ops.cl_control = clnt_vc_control; 762 } 763 mutex_unlock(&ops_lock); 764 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 765 return (&ops); 766 } 767 768 /* 769 * Make sure that the time is not garbage. -1 value is disallowed. 770 * Note this is different from time_not_ok in clnt_dg.c 771 */ 772 static bool_t 773 time_not_ok(t) 774 struct timeval *t; 775 { 776 777 _DIAGASSERT(t != NULL); 778 779 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 780 t->tv_usec <= -1 || t->tv_usec > 1000000); 781 } 782
Indexes created Thu Oct 02 10:09:58 GMT 2025