clnt_vc.c revision 1.7.2.1
1 /* $NetBSD: clnt_vc.c,v 1.7.2.1 2001/08/08 16:13:44 nathanw 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 1.7.2.1 2001/08/08 16:13:44 nathanw 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 _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 timeval now; 169 struct rpc_msg call_msg; 170 static u_int32_t disrupt; 171 #ifdef _REENTRANT 172 sigset_t mask; 173 #endif 174 sigset_t newmask; 175 struct sockaddr_storage ss; 176 socklen_t slen; 177 struct __rpc_sockinfo si; 178 179 _DIAGASSERT(raddr != NULL); 180 181 if (disrupt == 0) 182 disrupt = (u_int32_t)(long)raddr; 183 184 h = mem_alloc(sizeof(*h)); 185 if (h == NULL) { 186 warnx("clnt_vc_create: out of memory"); 187 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 188 rpc_createerr.cf_error.re_errno = errno; 189 goto fooy; 190 } 191 ct = mem_alloc(sizeof(*ct)); 192 if (ct == NULL) { 193 warnx("clnt_vc_create: out of memory"); 194 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 195 rpc_createerr.cf_error.re_errno = errno; 196 goto fooy; 197 } 198 199 sigfillset(&newmask); 200 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 201 #ifdef _REENTRANT 202 mutex_lock(&clnt_fd_lock); 203 if (vc_fd_locks == (int *) NULL) { 204 int cv_allocsz, fd_allocsz; 205 int dtbsize = __rpc_dtbsize(); 206 207 fd_allocsz = dtbsize * sizeof (int); 208 vc_fd_locks = (int *) mem_alloc(fd_allocsz); 209 if (vc_fd_locks == (int *) NULL) { 210 mutex_unlock(&clnt_fd_lock); 211 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 212 goto fooy; 213 } else 214 memset(vc_fd_locks, '\0', fd_allocsz); 215 216 assert(vc_cv == (cond_t *) NULL); 217 cv_allocsz = dtbsize * sizeof (cond_t); 218 vc_cv = (cond_t *) mem_alloc(cv_allocsz); 219 if (vc_cv == (cond_t *) NULL) { 220 mem_free(vc_fd_locks, fd_allocsz); 221 vc_fd_locks = (int *) NULL; 222 mutex_unlock(&clnt_fd_lock); 223 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 224 goto fooy; 225 } else { 226 int i; 227 228 for (i = 0; i < dtbsize; i++) 229 cond_init(&vc_cv[i], 0, (void *) 0); 230 } 231 } else 232 assert(vc_cv != (cond_t *) NULL); 233 #endif 234 235 /* 236 * XXX - fvdl connecting while holding a mutex? 237 */ 238 slen = sizeof ss; 239 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 240 if (errno != ENOTCONN) { 241 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 242 rpc_createerr.cf_error.re_errno = errno; 243 mutex_unlock(&clnt_fd_lock); 244 goto fooy; 245 } 246 if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){ 247 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 248 rpc_createerr.cf_error.re_errno = errno; 249 mutex_unlock(&clnt_fd_lock); 250 goto fooy; 251 } 252 } 253 mutex_unlock(&clnt_fd_lock); 254 if (!__rpc_fd2sockinfo(fd, &si)) 255 goto fooy; 256 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 257 258 ct->ct_closeit = FALSE; 259 260 /* 261 * Set up private data struct 262 */ 263 ct->ct_fd = fd; 264 ct->ct_wait.tv_usec = 0; 265 ct->ct_waitset = FALSE; 266 ct->ct_addr.buf = malloc(raddr->maxlen); 267 if (ct->ct_addr.buf == NULL) 268 goto fooy; 269 memcpy(ct->ct_addr.buf, &raddr->buf, raddr->len); 270 ct->ct_addr.len = raddr->maxlen; 271 ct->ct_addr.maxlen = raddr->maxlen; 272 273 /* 274 * Initialize call message 275 */ 276 (void)gettimeofday(&now, NULL); 277 call_msg.rm_xid = ((u_int32_t)++disrupt) ^ __RPC_GETXID(&now); 278 call_msg.rm_direction = CALL; 279 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 280 call_msg.rm_call.cb_prog = (u_int32_t)prog; 281 call_msg.rm_call.cb_vers = (u_int32_t)vers; 282 283 /* 284 * pre-serialize the static part of the call msg and stash it away 285 */ 286 xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE, 287 XDR_ENCODE); 288 if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) { 289 if (ct->ct_closeit) { 290 (void)close(fd); 291 } 292 goto fooy; 293 } 294 ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs)); 295 XDR_DESTROY(&(ct->ct_xdrs)); 296 297 /* 298 * Create a client handle which uses xdrrec for serialization 299 * and authnone for authentication. 300 */ 301 h->cl_ops = clnt_vc_ops(); 302 h->cl_private = ct; 303 h->cl_auth = authnone_create(); 304 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 305 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 306 xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz, 307 h->cl_private, read_vc, write_vc); 308 return (h); 309 310 fooy: 311 /* 312 * Something goofed, free stuff and barf 313 */ 314 if (ct) 315 mem_free(ct, sizeof(struct ct_data)); 316 if (h) 317 mem_free(h, sizeof(CLIENT)); 318 return (NULL); 319 } 320 321 static enum clnt_stat 322 clnt_vc_call(h, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout) 323 CLIENT *h; 324 rpcproc_t proc; 325 xdrproc_t xdr_args; 326 caddr_t args_ptr; 327 xdrproc_t xdr_results; 328 caddr_t results_ptr; 329 struct timeval timeout; 330 { 331 struct ct_data *ct; 332 XDR *xdrs; 333 struct rpc_msg reply_msg; 334 u_int32_t x_id; 335 u_int32_t *msg_x_id; 336 bool_t shipnow; 337 int refreshes = 2; 338 #ifdef _REENTRANT 339 sigset_t mask, newmask; 340 #endif 341 342 _DIAGASSERT(h != NULL); 343 344 #ifdef _REENTRANT 345 sigfillset(&newmask); 346 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 347 mutex_lock(&clnt_fd_lock); 348 while (vc_fd_locks[ct->ct_fd]) 349 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 350 vc_fd_locks[ct->ct_fd] = __rpc_lock_value; 351 mutex_unlock(&clnt_fd_lock); 352 #endif 353 354 ct = (struct ct_data *) h->cl_private; 355 xdrs = &(ct->ct_xdrs); 356 msg_x_id = &ct->ct_u.ct_mcalli; 357 358 if (!ct->ct_waitset) { 359 if (time_not_ok(&timeout) == FALSE) 360 ct->ct_wait = timeout; 361 } 362 363 shipnow = 364 (xdr_results == NULL && timeout.tv_sec == 0 365 && timeout.tv_usec == 0) ? FALSE : TRUE; 366 367 call_again: 368 xdrs->x_op = XDR_ENCODE; 369 ct->ct_error.re_status = RPC_SUCCESS; 370 x_id = ntohl(--(*msg_x_id)); 371 if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) || 372 (! XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 373 (! AUTH_MARSHALL(h->cl_auth, xdrs)) || 374 (! (*xdr_args)(xdrs, args_ptr))) { 375 if (ct->ct_error.re_status == RPC_SUCCESS) 376 ct->ct_error.re_status = RPC_CANTENCODEARGS; 377 (void)xdrrec_endofrecord(xdrs, TRUE); 378 release_fd_lock(ct->ct_fd, mask); 379 return (ct->ct_error.re_status); 380 } 381 if (! xdrrec_endofrecord(xdrs, shipnow)) { 382 release_fd_lock(ct->ct_fd, mask); 383 return (ct->ct_error.re_status = RPC_CANTSEND); 384 } 385 if (! shipnow) { 386 release_fd_lock(ct->ct_fd, mask); 387 return (RPC_SUCCESS); 388 } 389 /* 390 * Hack to provide rpc-based message passing 391 */ 392 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 393 release_fd_lock(ct->ct_fd, mask); 394 return(ct->ct_error.re_status = RPC_TIMEDOUT); 395 } 396 397 398 /* 399 * Keep receiving until we get a valid transaction id 400 */ 401 xdrs->x_op = XDR_DECODE; 402 for (;;) { 403 reply_msg.acpted_rply.ar_verf = _null_auth; 404 reply_msg.acpted_rply.ar_results.where = NULL; 405 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 406 if (! xdrrec_skiprecord(xdrs)) { 407 release_fd_lock(ct->ct_fd, mask); 408 return (ct->ct_error.re_status); 409 } 410 /* now decode and validate the response header */ 411 if (! xdr_replymsg(xdrs, &reply_msg)) { 412 if (ct->ct_error.re_status == RPC_SUCCESS) 413 continue; 414 release_fd_lock(ct->ct_fd, mask); 415 return (ct->ct_error.re_status); 416 } 417 if (reply_msg.rm_xid == x_id) 418 break; 419 } 420 421 /* 422 * process header 423 */ 424 _seterr_reply(&reply_msg, &(ct->ct_error)); 425 if (ct->ct_error.re_status == RPC_SUCCESS) { 426 if (! AUTH_VALIDATE(h->cl_auth, 427 &reply_msg.acpted_rply.ar_verf)) { 428 ct->ct_error.re_status = RPC_AUTHERROR; 429 ct->ct_error.re_why = AUTH_INVALIDRESP; 430 } else if (! (*xdr_results)(xdrs, results_ptr)) { 431 if (ct->ct_error.re_status == RPC_SUCCESS) 432 ct->ct_error.re_status = RPC_CANTDECODERES; 433 } 434 /* free verifier ... */ 435 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 436 xdrs->x_op = XDR_FREE; 437 (void)xdr_opaque_auth(xdrs, 438 &(reply_msg.acpted_rply.ar_verf)); 439 } 440 } /* end successful completion */ 441 else { 442 /* maybe our credentials need to be refreshed ... */ 443 if (refreshes-- && AUTH_REFRESH(h->cl_auth)) 444 goto call_again; 445 } /* end of unsuccessful completion */ 446 release_fd_lock(ct->ct_fd, mask); 447 return (ct->ct_error.re_status); 448 } 449 450 static void 451 clnt_vc_geterr(h, errp) 452 CLIENT *h; 453 struct rpc_err *errp; 454 { 455 struct ct_data *ct; 456 457 _DIAGASSERT(h != NULL); 458 _DIAGASSERT(errp != NULL); 459 460 ct = (struct ct_data *) h->cl_private; 461 *errp = ct->ct_error; 462 } 463 464 static bool_t 465 clnt_vc_freeres(cl, xdr_res, res_ptr) 466 CLIENT *cl; 467 xdrproc_t xdr_res; 468 caddr_t res_ptr; 469 { 470 struct ct_data *ct; 471 XDR *xdrs; 472 bool_t dummy; 473 #ifdef _REENTRANT 474 sigset_t mask; 475 #endif 476 sigset_t newmask; 477 478 _DIAGASSERT(cl != NULL); 479 480 ct = (struct ct_data *)cl->cl_private; 481 xdrs = &(ct->ct_xdrs); 482 483 sigfillset(&newmask); 484 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 485 mutex_lock(&clnt_fd_lock); 486 #ifdef _REENTRANT 487 while (vc_fd_locks[ct->ct_fd]) 488 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 489 #endif 490 491 xdrs->x_op = XDR_FREE; 492 dummy = (*xdr_res)(xdrs, res_ptr); 493 mutex_unlock(&clnt_fd_lock); 494 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 495 cond_signal(&vc_cv[ct->ct_fd]); 496 497 return dummy; 498 } 499 500 /*ARGSUSED*/ 501 static void 502 clnt_vc_abort(cl) 503 CLIENT *cl; 504 { 505 } 506 507 static bool_t 508 clnt_vc_control(cl, request, info) 509 CLIENT *cl; 510 u_int request; 511 char *info; 512 { 513 struct ct_data *ct; 514 void *infop = info; 515 #ifdef _REENTRANT 516 sigset_t mask; 517 #endif 518 sigset_t newmask; 519 520 _DIAGASSERT(cl != NULL); 521 522 ct = (struct ct_data *)cl->cl_private; 523 524 sigfillset(&newmask); 525 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 526 mutex_lock(&clnt_fd_lock); 527 #ifdef _REENTRANT 528 while (vc_fd_locks[ct->ct_fd]) 529 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 530 vc_fd_locks[ct->ct_fd] = __rpc_lock_value; 531 #endif 532 mutex_unlock(&clnt_fd_lock); 533 534 switch (request) { 535 case CLSET_FD_CLOSE: 536 ct->ct_closeit = TRUE; 537 release_fd_lock(ct->ct_fd, mask); 538 return (TRUE); 539 case CLSET_FD_NCLOSE: 540 ct->ct_closeit = FALSE; 541 release_fd_lock(ct->ct_fd, mask); 542 return (TRUE); 543 default: 544 break; 545 } 546 547 /* for other requests which use info */ 548 if (info == NULL) { 549 release_fd_lock(ct->ct_fd, mask); 550 return (FALSE); 551 } 552 switch (request) { 553 case CLSET_TIMEOUT: 554 if (time_not_ok((struct timeval *)(void *)info)) { 555 release_fd_lock(ct->ct_fd, mask); 556 return (FALSE); 557 } 558 ct->ct_wait = *(struct timeval *)infop; 559 ct->ct_waitset = TRUE; 560 break; 561 case CLGET_TIMEOUT: 562 *(struct timeval *)infop = ct->ct_wait; 563 break; 564 case CLGET_SERVER_ADDR: 565 (void) memcpy(info, ct->ct_addr.buf, (size_t)ct->ct_addr.len); 566 break; 567 case CLGET_FD: 568 *(int *)(void *)info = ct->ct_fd; 569 break; 570 case CLGET_SVC_ADDR: 571 /* The caller should not free this memory area */ 572 *(struct netbuf *)(void *)info = ct->ct_addr; 573 break; 574 case CLSET_SVC_ADDR: /* set to new address */ 575 release_fd_lock(ct->ct_fd, mask); 576 return (FALSE); 577 case CLGET_XID: 578 /* 579 * use the knowledge that xid is the 580 * first element in the call structure 581 * This will get the xid of the PREVIOUS call 582 */ 583 *(u_int32_t *)(void *)info = 584 ntohl(*(u_int32_t *)(void *)&ct->ct_u.ct_mcalli); 585 break; 586 case CLSET_XID: 587 /* This will set the xid of the NEXT call */ 588 *(u_int32_t *)(void *)&ct->ct_u.ct_mcalli = 589 htonl(*((u_int32_t *)(void *)info) + 1); 590 /* increment by 1 as clnt_vc_call() decrements once */ 591 break; 592 case CLGET_VERS: 593 /* 594 * This RELIES on the information that, in the call body, 595 * the version number field is the fifth field from the 596 * begining of the RPC header. MUST be changed if the 597 * call_struct is changed 598 */ 599 *(u_int32_t *)(void *)info = 600 ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 601 4 * BYTES_PER_XDR_UNIT)); 602 break; 603 604 case CLSET_VERS: 605 *(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 606 4 * BYTES_PER_XDR_UNIT) = 607 htonl(*(u_int32_t *)(void *)info); 608 break; 609 610 case CLGET_PROG: 611 /* 612 * This RELIES on the information that, in the call body, 613 * the program number field is the fourth field from the 614 * begining of the RPC header. MUST be changed if the 615 * call_struct is changed 616 */ 617 *(u_int32_t *)(void *)info = 618 ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 619 3 * BYTES_PER_XDR_UNIT)); 620 break; 621 622 case CLSET_PROG: 623 *(u_int32_t *)(void *)(ct->ct_u.ct_mcallc + 624 3 * BYTES_PER_XDR_UNIT) = 625 htonl(*(u_int32_t *)(void *)info); 626 break; 627 628 default: 629 release_fd_lock(ct->ct_fd, mask); 630 return (FALSE); 631 } 632 release_fd_lock(ct->ct_fd, mask); 633 return (TRUE); 634 } 635 636 637 static void 638 clnt_vc_destroy(cl) 639 CLIENT *cl; 640 { 641 struct ct_data *ct; 642 #ifdef _REENTRANT 643 int ct_fd = ct->ct_fd; 644 sigset_t mask; 645 #endif 646 sigset_t newmask; 647 648 _DIAGASSERT(cl != NULL); 649 650 ct = (struct ct_data *) cl->cl_private; 651 652 sigfillset(&newmask); 653 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 654 mutex_lock(&clnt_fd_lock); 655 #ifdef _REENTRANT 656 while (vc_fd_locks[ct_fd]) 657 cond_wait(&vc_cv[ct_fd], &clnt_fd_lock); 658 #endif 659 if (ct->ct_closeit && ct->ct_fd != -1) { 660 (void)close(ct->ct_fd); 661 } 662 XDR_DESTROY(&(ct->ct_xdrs)); 663 if (ct->ct_addr.buf) 664 free(ct->ct_addr.buf); 665 mem_free(ct, sizeof(struct ct_data)); 666 mem_free(cl, sizeof(CLIENT)); 667 mutex_unlock(&clnt_fd_lock); 668 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 669 670 cond_signal(&vc_cv[ct_fd]); 671 } 672 673 /* 674 * Interface between xdr serializer and tcp connection. 675 * Behaves like the system calls, read & write, but keeps some error state 676 * around for the rpc level. 677 */ 678 static int 679 read_vc(ctp, buf, len) 680 caddr_t ctp; 681 caddr_t buf; 682 int len; 683 { 684 struct ct_data *ct = (struct ct_data *)(void *)ctp; 685 struct pollfd fd; 686 int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) + 687 (ct->ct_wait.tv_usec / 1000)); 688 689 if (len == 0) 690 return (0); 691 fd.fd = ct->ct_fd; 692 fd.events = POLLIN; 693 for (;;) { 694 switch (poll(&fd, 1, milliseconds)) { 695 case 0: 696 ct->ct_error.re_status = RPC_TIMEDOUT; 697 return (-1); 698 699 case -1: 700 if (errno == EINTR) 701 continue; 702 ct->ct_error.re_status = RPC_CANTRECV; 703 ct->ct_error.re_errno = errno; 704 return (-1); 705 } 706 break; 707 } 708 switch (len = read(ct->ct_fd, buf, (size_t)len)) { 709 710 case 0: 711 /* premature eof */ 712 ct->ct_error.re_errno = ECONNRESET; 713 ct->ct_error.re_status = RPC_CANTRECV; 714 len = -1; /* it's really an error */ 715 break; 716 717 case -1: 718 ct->ct_error.re_errno = errno; 719 ct->ct_error.re_status = RPC_CANTRECV; 720 break; 721 } 722 return (len); 723 } 724 725 static int 726 write_vc(ctp, buf, len) 727 caddr_t ctp; 728 caddr_t buf; 729 int len; 730 { 731 struct ct_data *ct = (struct ct_data *)(void *)ctp; 732 int i, cnt; 733 734 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 735 if ((i = write(ct->ct_fd, buf, (size_t)cnt)) == -1) { 736 ct->ct_error.re_errno = errno; 737 ct->ct_error.re_status = RPC_CANTSEND; 738 return (-1); 739 } 740 } 741 return (len); 742 } 743 744 static struct clnt_ops * 745 clnt_vc_ops() 746 { 747 static struct clnt_ops ops; 748 #ifdef _REENTRANT 749 extern mutex_t ops_lock; 750 sigset_t mask; 751 #endif 752 sigset_t newmask; 753 754 /* VARIABLES PROTECTED BY ops_lock: ops */ 755 756 sigfillset(&newmask); 757 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 758 mutex_lock(&ops_lock); 759 if (ops.cl_call == NULL) { 760 ops.cl_call = clnt_vc_call; 761 ops.cl_abort = clnt_vc_abort; 762 ops.cl_geterr = clnt_vc_geterr; 763 ops.cl_freeres = clnt_vc_freeres; 764 ops.cl_destroy = clnt_vc_destroy; 765 ops.cl_control = clnt_vc_control; 766 } 767 mutex_unlock(&ops_lock); 768 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 769 return (&ops); 770 } 771 772 /* 773 * Make sure that the time is not garbage. -1 value is disallowed. 774 * Note this is different from time_not_ok in clnt_dg.c 775 */ 776 static bool_t 777 time_not_ok(t) 778 struct timeval *t; 779 { 780 781 _DIAGASSERT(t != NULL); 782 783 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 784 t->tv_usec <= -1 || t->tv_usec > 1000000); 785 } 786
Indexes created Thu Oct 02 10:09:58 GMT 2025