clnt_vc.c revision 330897
1/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */ 2 3/*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#if defined(LIBC_SCCS) && !defined(lint) 34static char *sccsid2 = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro"; 35static char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 36static char sccsid3[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 37#endif 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: stable/11/lib/libc/rpc/clnt_vc.c 330897 2018-03-14 03:19:51Z eadler $"); 40 41/* 42 * clnt_tcp.c, Implements a TCP/IP based, client side RPC. 43 * 44 * Copyright (C) 1984, Sun Microsystems, Inc. 45 * 46 * TCP based RPC supports 'batched calls'. 47 * A sequence of calls may be batched-up in a send buffer. The rpc call 48 * return immediately to the client even though the call was not necessarily 49 * sent. The batching occurs if the results' xdr routine is NULL (0) AND 50 * the rpc timeout value is zero (see clnt.h, rpc). 51 * 52 * Clients should NOT casually batch calls that in fact return results; that is, 53 * the server side should be aware that a call is batched and not produce any 54 * return message. Batched calls that produce many result messages can 55 * deadlock (netlock) the client and the server.... 56 * 57 * Now go hang yourself. 58 */ 59 60#include "namespace.h" 61#include "reentrant.h" 62#include <sys/types.h> 63#include <sys/poll.h> 64#include <sys/syslog.h> 65#include <sys/socket.h> 66#include <sys/un.h> 67#include <sys/uio.h> 68 69#include <arpa/inet.h> 70#include <assert.h> 71#include <err.h> 72#include <errno.h> 73#include <netdb.h> 74#include <stdio.h> 75#include <stdlib.h> 76#include <string.h> 77#include <unistd.h> 78#include <signal.h> 79 80#include <rpc/rpc.h> 81#include <rpc/rpcsec_gss.h> 82#include "un-namespace.h" 83#include "rpc_com.h" 84#include "mt_misc.h" 85 86#define MCALL_MSG_SIZE 24 87 88struct cmessage { 89 struct cmsghdr cmsg; 90 struct cmsgcred cmcred; 91}; 92 93static enum clnt_stat clnt_vc_call(CLIENT *, rpcproc_t, xdrproc_t, void *, 94 xdrproc_t, void *, struct timeval); 95static void clnt_vc_geterr(CLIENT *, struct rpc_err *); 96static bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *); 97static void clnt_vc_abort(CLIENT *); 98static bool_t clnt_vc_control(CLIENT *, u_int, void *); 99static void clnt_vc_destroy(CLIENT *); 100static struct clnt_ops *clnt_vc_ops(void); 101static bool_t time_not_ok(struct timeval *); 102static int read_vc(void *, void *, int); 103static int write_vc(void *, void *, int); 104static int __msgwrite(int, void *, size_t); 105static int __msgread(int, void *, size_t); 106 107struct ct_data { 108 int ct_fd; /* connection's fd */ 109 bool_t ct_closeit; /* close it on destroy */ 110 struct timeval ct_wait; /* wait interval in milliseconds */ 111 bool_t ct_waitset; /* wait set by clnt_control? */ 112 struct netbuf ct_addr; /* remote addr */ 113 struct rpc_err ct_error; 114 union { 115 char ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */ 116 u_int32_t ct_mcalli; 117 } ct_u; 118 u_int ct_mpos; /* pos after marshal */ 119 XDR ct_xdrs; /* XDR stream */ 120}; 121 122/* 123 * This machinery implements per-fd locks for MT-safety. It is not 124 * sufficient to do per-CLIENT handle locks for MT-safety because a 125 * user may create more than one CLIENT handle with the same fd behind 126 * it. Therfore, we allocate an array of flags (vc_fd_locks), protected 127 * by the clnt_fd_lock mutex, and an array (vc_cv) of condition variables 128 * similarly protected. Vc_fd_lock[fd] == 1 => a call is activte on some 129 * CLIENT handle created for that fd. 130 * The current implementation holds locks across the entire RPC and reply. 131 * Yes, this is silly, and as soon as this code is proven to work, this 132 * should be the first thing fixed. One step at a time. 133 */ 134static int *vc_fd_locks; 135static cond_t *vc_cv; 136#define release_fd_lock(fd, mask) { \ 137 mutex_lock(&clnt_fd_lock); \ 138 vc_fd_locks[fd] = 0; \ 139 mutex_unlock(&clnt_fd_lock); \ 140 thr_sigsetmask(SIG_SETMASK, &(mask), (sigset_t *) NULL); \ 141 cond_signal(&vc_cv[fd]); \ 142} 143 144static const char clnt_vc_errstr[] = "%s : %s"; 145static const char clnt_vc_str[] = "clnt_vc_create"; 146static const char __no_mem_str[] = "out of memory"; 147 148/* 149 * Create a client handle for a connection. 150 * Default options are set, which the user can change using clnt_control()'s. 151 * The rpc/vc package does buffering similar to stdio, so the client 152 * must pick send and receive buffer sizes, 0 => use the default. 153 * NB: fd is copied into a private area. 154 * NB: The rpch->cl_auth is set null authentication. Caller may wish to 155 * set this something more useful. 156 * 157 * fd should be an open socket 158 * 159 * fd - open file descriptor 160 * raddr - servers address 161 * prog - program number 162 * vers - version number 163 * sendsz - buffer send size 164 * recvsz - buffer recv size 165 */ 166CLIENT * 167clnt_vc_create(int fd, const struct netbuf *raddr, const rpcprog_t prog, 168 const rpcvers_t vers, u_int sendsz, u_int recvsz) 169{ 170 CLIENT *cl; /* client handle */ 171 struct ct_data *ct = NULL; /* client handle */ 172 struct timeval now; 173 struct rpc_msg call_msg; 174 static u_int32_t disrupt; 175 sigset_t mask; 176 sigset_t newmask; 177 struct sockaddr_storage ss; 178 socklen_t slen; 179 struct __rpc_sockinfo si; 180 181 if (disrupt == 0) 182 disrupt = (u_int32_t)(long)raddr; 183 184 cl = (CLIENT *)mem_alloc(sizeof (*cl)); 185 ct = (struct ct_data *)mem_alloc(sizeof (*ct)); 186 if ((cl == (CLIENT *)NULL) || (ct == (struct ct_data *)NULL)) { 187 (void) syslog(LOG_ERR, clnt_vc_errstr, 188 clnt_vc_str, __no_mem_str); 189 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 190 rpc_createerr.cf_error.re_errno = errno; 191 goto err; 192 } 193 ct->ct_addr.buf = NULL; 194 sigfillset(&newmask); 195 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 196 mutex_lock(&clnt_fd_lock); 197 if (vc_fd_locks == (int *) NULL) { 198 int cv_allocsz, fd_allocsz; 199 int dtbsize = __rpc_dtbsize(); 200 201 fd_allocsz = dtbsize * sizeof (int); 202 vc_fd_locks = (int *) mem_alloc(fd_allocsz); 203 if (vc_fd_locks == (int *) NULL) { 204 mutex_unlock(&clnt_fd_lock); 205 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 206 goto err; 207 } else 208 memset(vc_fd_locks, '\0', fd_allocsz); 209 210 assert(vc_cv == (cond_t *) NULL); 211 cv_allocsz = dtbsize * sizeof (cond_t); 212 vc_cv = (cond_t *) mem_alloc(cv_allocsz); 213 if (vc_cv == (cond_t *) NULL) { 214 mem_free(vc_fd_locks, fd_allocsz); 215 vc_fd_locks = (int *) NULL; 216 mutex_unlock(&clnt_fd_lock); 217 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 218 goto err; 219 } else { 220 int i; 221 222 for (i = 0; i < dtbsize; i++) 223 cond_init(&vc_cv[i], 0, (void *) 0); 224 } 225 } else 226 assert(vc_cv != (cond_t *) NULL); 227 228 /* 229 * XXX - fvdl connecting while holding a mutex? 230 */ 231 slen = sizeof ss; 232 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 233 if (errno != ENOTCONN) { 234 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 235 rpc_createerr.cf_error.re_errno = errno; 236 mutex_unlock(&clnt_fd_lock); 237 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 238 goto err; 239 } 240 if (_connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){ 241 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 242 rpc_createerr.cf_error.re_errno = errno; 243 mutex_unlock(&clnt_fd_lock); 244 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 245 goto err; 246 } 247 } 248 mutex_unlock(&clnt_fd_lock); 249 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 250 if (!__rpc_fd2sockinfo(fd, &si)) 251 goto err; 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 err; 264 memcpy(ct->ct_addr.buf, raddr->buf, raddr->len); 265 ct->ct_addr.len = raddr->len; 266 ct->ct_addr.maxlen = raddr->maxlen; 267 268 /* 269 * Initialize call message 270 */ 271 (void)gettimeofday(&now, NULL); 272 call_msg.rm_xid = ((u_int32_t)++disrupt) ^ __RPC_GETXID(&now); 273 call_msg.rm_direction = CALL; 274 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 275 call_msg.rm_call.cb_prog = (u_int32_t)prog; 276 call_msg.rm_call.cb_vers = (u_int32_t)vers; 277 278 /* 279 * pre-serialize the static part of the call msg and stash it away 280 */ 281 xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE, 282 XDR_ENCODE); 283 if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) { 284 if (ct->ct_closeit) { 285 (void)_close(fd); 286 } 287 goto err; 288 } 289 ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs)); 290 XDR_DESTROY(&(ct->ct_xdrs)); 291 assert(ct->ct_mpos + sizeof(uint32_t) <= MCALL_MSG_SIZE); 292 293 /* 294 * Create a client handle which uses xdrrec for serialization 295 * and authnone for authentication. 296 */ 297 cl->cl_ops = clnt_vc_ops(); 298 cl->cl_private = ct; 299 cl->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 cl->cl_private, read_vc, write_vc); 304 return (cl); 305 306err: 307 if (ct) { 308 if (ct->ct_addr.len) 309 mem_free(ct->ct_addr.buf, ct->ct_addr.len); 310 mem_free(ct, sizeof (struct ct_data)); 311 } 312 if (cl) 313 mem_free(cl, sizeof (CLIENT)); 314 return ((CLIENT *)NULL); 315} 316 317static enum clnt_stat 318clnt_vc_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xdr_args, void *args_ptr, 319 xdrproc_t xdr_results, void *results_ptr, struct timeval timeout) 320{ 321 struct ct_data *ct = (struct ct_data *) cl->cl_private; 322 XDR *xdrs = &(ct->ct_xdrs); 323 struct rpc_msg reply_msg; 324 u_int32_t x_id; 325 u_int32_t *msg_x_id = &ct->ct_u.ct_mcalli; /* yuk */ 326 bool_t shipnow; 327 int refreshes = 2; 328 sigset_t mask, newmask; 329 int rpc_lock_value; 330 bool_t reply_stat; 331 332 assert(cl != NULL); 333 334 sigfillset(&newmask); 335 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 336 mutex_lock(&clnt_fd_lock); 337 while (vc_fd_locks[ct->ct_fd]) 338 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 339 if (__isthreaded) 340 rpc_lock_value = 1; 341 else 342 rpc_lock_value = 0; 343 vc_fd_locks[ct->ct_fd] = rpc_lock_value; 344 mutex_unlock(&clnt_fd_lock); 345 if (!ct->ct_waitset) { 346 /* If time is not within limits, we ignore it. */ 347 if (time_not_ok(&timeout) == FALSE) 348 ct->ct_wait = timeout; 349 } 350 351 shipnow = 352 (xdr_results == NULL && timeout.tv_sec == 0 353 && timeout.tv_usec == 0) ? FALSE : TRUE; 354 355call_again: 356 xdrs->x_op = XDR_ENCODE; 357 ct->ct_error.re_status = RPC_SUCCESS; 358 x_id = ntohl(--(*msg_x_id)); 359 360 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 361 if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) || 362 (! XDR_PUTINT32(xdrs, &proc)) || 363 (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || 364 (! (*xdr_args)(xdrs, args_ptr))) { 365 if (ct->ct_error.re_status == RPC_SUCCESS) 366 ct->ct_error.re_status = RPC_CANTENCODEARGS; 367 (void)xdrrec_endofrecord(xdrs, TRUE); 368 release_fd_lock(ct->ct_fd, mask); 369 return (ct->ct_error.re_status); 370 } 371 } else { 372 *(uint32_t *) &ct->ct_u.ct_mcallc[ct->ct_mpos] = htonl(proc); 373 if (! __rpc_gss_wrap(cl->cl_auth, ct->ct_u.ct_mcallc, 374 ct->ct_mpos + sizeof(uint32_t), 375 xdrs, xdr_args, args_ptr)) { 376 if (ct->ct_error.re_status == RPC_SUCCESS) 377 ct->ct_error.re_status = RPC_CANTENCODEARGS; 378 (void)xdrrec_endofrecord(xdrs, TRUE); 379 release_fd_lock(ct->ct_fd, mask); 380 return (ct->ct_error.re_status); 381 } 382 } 383 if (! xdrrec_endofrecord(xdrs, shipnow)) { 384 release_fd_lock(ct->ct_fd, mask); 385 return (ct->ct_error.re_status = RPC_CANTSEND); 386 } 387 if (! shipnow) { 388 release_fd_lock(ct->ct_fd, mask); 389 return (RPC_SUCCESS); 390 } 391 /* 392 * Hack to provide rpc-based message passing 393 */ 394 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 395 release_fd_lock(ct->ct_fd, mask); 396 return(ct->ct_error.re_status = RPC_TIMEDOUT); 397 } 398 399 400 /* 401 * Keep receiving until we get a valid transaction id 402 */ 403 xdrs->x_op = XDR_DECODE; 404 while (TRUE) { 405 reply_msg.acpted_rply.ar_verf = _null_auth; 406 reply_msg.acpted_rply.ar_results.where = NULL; 407 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 408 if (! xdrrec_skiprecord(xdrs)) { 409 release_fd_lock(ct->ct_fd, mask); 410 return (ct->ct_error.re_status); 411 } 412 /* now decode and validate the response header */ 413 if (! xdr_replymsg(xdrs, &reply_msg)) { 414 if (ct->ct_error.re_status == RPC_SUCCESS) 415 continue; 416 release_fd_lock(ct->ct_fd, mask); 417 return (ct->ct_error.re_status); 418 } 419 if (reply_msg.rm_xid == x_id) 420 break; 421 } 422 423 /* 424 * process header 425 */ 426 _seterr_reply(&reply_msg, &(ct->ct_error)); 427 if (ct->ct_error.re_status == RPC_SUCCESS) { 428 if (! AUTH_VALIDATE(cl->cl_auth, 429 &reply_msg.acpted_rply.ar_verf)) { 430 ct->ct_error.re_status = RPC_AUTHERROR; 431 ct->ct_error.re_why = AUTH_INVALIDRESP; 432 } else { 433 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 434 reply_stat = (*xdr_results)(xdrs, results_ptr); 435 } else { 436 reply_stat = __rpc_gss_unwrap(cl->cl_auth, 437 xdrs, xdr_results, results_ptr); 438 } 439 if (! reply_stat) { 440 if (ct->ct_error.re_status == RPC_SUCCESS) 441 ct->ct_error.re_status = 442 RPC_CANTDECODERES; 443 } 444 } 445 /* free verifier ... */ 446 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 447 xdrs->x_op = XDR_FREE; 448 (void)xdr_opaque_auth(xdrs, 449 &(reply_msg.acpted_rply.ar_verf)); 450 } 451 } /* end successful completion */ 452 else { 453 /* maybe our credentials need to be refreshed ... */ 454 if (refreshes-- && AUTH_REFRESH(cl->cl_auth, &reply_msg)) 455 goto call_again; 456 } /* end of unsuccessful completion */ 457 release_fd_lock(ct->ct_fd, mask); 458 return (ct->ct_error.re_status); 459} 460 461static void 462clnt_vc_geterr(CLIENT *cl, struct rpc_err *errp) 463{ 464 struct ct_data *ct; 465 466 assert(cl != NULL); 467 assert(errp != NULL); 468 469 ct = (struct ct_data *) cl->cl_private; 470 *errp = ct->ct_error; 471} 472 473static bool_t 474clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 475{ 476 struct ct_data *ct; 477 XDR *xdrs; 478 bool_t dummy; 479 sigset_t mask; 480 sigset_t newmask; 481 482 assert(cl != NULL); 483 484 ct = (struct ct_data *)cl->cl_private; 485 xdrs = &(ct->ct_xdrs); 486 487 sigfillset(&newmask); 488 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 489 mutex_lock(&clnt_fd_lock); 490 while (vc_fd_locks[ct->ct_fd]) 491 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 492 xdrs->x_op = XDR_FREE; 493 dummy = (*xdr_res)(xdrs, res_ptr); 494 mutex_unlock(&clnt_fd_lock); 495 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 496 cond_signal(&vc_cv[ct->ct_fd]); 497 498 return dummy; 499} 500 501/*ARGSUSED*/ 502static void 503clnt_vc_abort(CLIENT *cl) 504{ 505} 506 507static __inline void 508htonlp(void *dst, const void *src, uint32_t incr) 509{ 510 /* We are aligned, so we think */ 511 *(uint32_t *)dst = htonl(*(const uint32_t *)src + incr); 512} 513 514static __inline void 515ntohlp(void *dst, const void *src) 516{ 517 /* We are aligned, so we think */ 518 *(uint32_t *)dst = htonl(*(const uint32_t *)src); 519} 520 521static bool_t 522clnt_vc_control(CLIENT *cl, u_int request, void *info) 523{ 524 struct ct_data *ct; 525 void *infop = info; 526 sigset_t mask; 527 sigset_t newmask; 528 int rpc_lock_value; 529 530 assert(cl != NULL); 531 532 ct = (struct ct_data *)cl->cl_private; 533 534 sigfillset(&newmask); 535 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 536 mutex_lock(&clnt_fd_lock); 537 while (vc_fd_locks[ct->ct_fd]) 538 cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock); 539 if (__isthreaded) 540 rpc_lock_value = 1; 541 else 542 rpc_lock_value = 0; 543 vc_fd_locks[ct->ct_fd] = rpc_lock_value; 544 mutex_unlock(&clnt_fd_lock); 545 546 switch (request) { 547 case CLSET_FD_CLOSE: 548 ct->ct_closeit = TRUE; 549 release_fd_lock(ct->ct_fd, mask); 550 return (TRUE); 551 case CLSET_FD_NCLOSE: 552 ct->ct_closeit = FALSE; 553 release_fd_lock(ct->ct_fd, mask); 554 return (TRUE); 555 default: 556 break; 557 } 558 559 /* for other requests which use info */ 560 if (info == NULL) { 561 release_fd_lock(ct->ct_fd, mask); 562 return (FALSE); 563 } 564 switch (request) { 565 case CLSET_TIMEOUT: 566 if (time_not_ok((struct timeval *)info)) { 567 release_fd_lock(ct->ct_fd, mask); 568 return (FALSE); 569 } 570 ct->ct_wait = *(struct timeval *)infop; 571 ct->ct_waitset = TRUE; 572 break; 573 case CLGET_TIMEOUT: 574 *(struct timeval *)infop = ct->ct_wait; 575 break; 576 case CLGET_SERVER_ADDR: 577 (void) memcpy(info, ct->ct_addr.buf, (size_t)ct->ct_addr.len); 578 break; 579 case CLGET_FD: 580 *(int *)info = ct->ct_fd; 581 break; 582 case CLGET_SVC_ADDR: 583 /* The caller should not free this memory area */ 584 *(struct netbuf *)info = ct->ct_addr; 585 break; 586 case CLSET_SVC_ADDR: /* set to new address */ 587 release_fd_lock(ct->ct_fd, mask); 588 return (FALSE); 589 case CLGET_XID: 590 /* 591 * use the knowledge that xid is the 592 * first element in the call structure 593 * This will get the xid of the PREVIOUS call 594 */ 595 ntohlp(info, &ct->ct_u.ct_mcalli); 596 break; 597 case CLSET_XID: 598 /* This will set the xid of the NEXT call */ 599 /* increment by 1 as clnt_vc_call() decrements once */ 600 htonlp(&ct->ct_u.ct_mcalli, info, 1); 601 break; 602 case CLGET_VERS: 603 /* 604 * This RELIES on the information that, in the call body, 605 * the version number field is the fifth field from the 606 * beginning of the RPC header. MUST be changed if the 607 * call_struct is changed 608 */ 609 ntohlp(info, ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT); 610 break; 611 612 case CLSET_VERS: 613 htonlp(ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT, info, 0); 614 break; 615 616 case CLGET_PROG: 617 /* 618 * This RELIES on the information that, in the call body, 619 * the program number field is the fourth field from the 620 * beginning of the RPC header. MUST be changed if the 621 * call_struct is changed 622 */ 623 ntohlp(info, ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT); 624 break; 625 626 case CLSET_PROG: 627 htonlp(ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT, info, 0); 628 break; 629 630 default: 631 release_fd_lock(ct->ct_fd, mask); 632 return (FALSE); 633 } 634 release_fd_lock(ct->ct_fd, mask); 635 return (TRUE); 636} 637 638 639static void 640clnt_vc_destroy(CLIENT *cl) 641{ 642 struct ct_data *ct = (struct ct_data *) cl->cl_private; 643 int ct_fd = ct->ct_fd; 644 sigset_t mask; 645 sigset_t newmask; 646 647 assert(cl != NULL); 648 649 ct = (struct ct_data *) cl->cl_private; 650 651 sigfillset(&newmask); 652 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 653 mutex_lock(&clnt_fd_lock); 654 while (vc_fd_locks[ct_fd]) 655 cond_wait(&vc_cv[ct_fd], &clnt_fd_lock); 656 if (ct->ct_closeit && ct->ct_fd != -1) { 657 (void)_close(ct->ct_fd); 658 } 659 XDR_DESTROY(&(ct->ct_xdrs)); 660 free(ct->ct_addr.buf); 661 mem_free(ct, sizeof(struct ct_data)); 662 if (cl->cl_netid && cl->cl_netid[0]) 663 mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 664 if (cl->cl_tp && cl->cl_tp[0]) 665 mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 666 mem_free(cl, sizeof(CLIENT)); 667 mutex_unlock(&clnt_fd_lock); 668 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 669 cond_signal(&vc_cv[ct_fd]); 670} 671 672/* 673 * Interface between xdr serializer and tcp connection. 674 * Behaves like the system calls, read & write, but keeps some error state 675 * around for the rpc level. 676 */ 677static int 678read_vc(void *ctp, void *buf, int len) 679{ 680 struct sockaddr sa; 681 socklen_t sal; 682 struct ct_data *ct = (struct ct_data *)ctp; 683 struct pollfd fd; 684 int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) + 685 (ct->ct_wait.tv_usec / 1000)); 686 687 if (len == 0) 688 return (0); 689 fd.fd = ct->ct_fd; 690 fd.events = POLLIN; 691 for (;;) { 692 switch (_poll(&fd, 1, milliseconds)) { 693 case 0: 694 ct->ct_error.re_status = RPC_TIMEDOUT; 695 return (-1); 696 697 case -1: 698 if (errno == EINTR) 699 continue; 700 ct->ct_error.re_status = RPC_CANTRECV; 701 ct->ct_error.re_errno = errno; 702 return (-1); 703 } 704 break; 705 } 706 707 sal = sizeof(sa); 708 if ((_getpeername(ct->ct_fd, &sa, &sal) == 0) && 709 (sa.sa_family == AF_LOCAL)) { 710 len = __msgread(ct->ct_fd, buf, (size_t)len); 711 } else { 712 len = _read(ct->ct_fd, buf, (size_t)len); 713 } 714 715 switch (len) { 716 case 0: 717 /* premature eof */ 718 ct->ct_error.re_errno = ECONNRESET; 719 ct->ct_error.re_status = RPC_CANTRECV; 720 len = -1; /* it's really an error */ 721 break; 722 723 case -1: 724 ct->ct_error.re_errno = errno; 725 ct->ct_error.re_status = RPC_CANTRECV; 726 break; 727 } 728 return (len); 729} 730 731static int 732write_vc(void *ctp, void *buf, int len) 733{ 734 struct sockaddr sa; 735 socklen_t sal; 736 struct ct_data *ct = (struct ct_data *)ctp; 737 int i, cnt; 738 739 sal = sizeof(sa); 740 if ((_getpeername(ct->ct_fd, &sa, &sal) == 0) && 741 (sa.sa_family == AF_LOCAL)) { 742 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 743 if ((i = __msgwrite(ct->ct_fd, buf, 744 (size_t)cnt)) == -1) { 745 ct->ct_error.re_errno = errno; 746 ct->ct_error.re_status = RPC_CANTSEND; 747 return (-1); 748 } 749 } 750 } else { 751 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 752 if ((i = _write(ct->ct_fd, buf, (size_t)cnt)) == -1) { 753 ct->ct_error.re_errno = errno; 754 ct->ct_error.re_status = RPC_CANTSEND; 755 return (-1); 756 } 757 } 758 } 759 return (len); 760} 761 762static struct clnt_ops * 763clnt_vc_ops(void) 764{ 765 static struct clnt_ops ops; 766 sigset_t mask, newmask; 767 768 /* VARIABLES PROTECTED BY ops_lock: ops */ 769 770 sigfillset(&newmask); 771 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 772 mutex_lock(&ops_lock); 773 if (ops.cl_call == NULL) { 774 ops.cl_call = clnt_vc_call; 775 ops.cl_abort = clnt_vc_abort; 776 ops.cl_geterr = clnt_vc_geterr; 777 ops.cl_freeres = clnt_vc_freeres; 778 ops.cl_destroy = clnt_vc_destroy; 779 ops.cl_control = clnt_vc_control; 780 } 781 mutex_unlock(&ops_lock); 782 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 783 return (&ops); 784} 785 786/* 787 * Make sure that the time is not garbage. -1 value is disallowed. 788 * Note this is different from time_not_ok in clnt_dg.c 789 */ 790static bool_t 791time_not_ok(struct timeval *t) 792{ 793 return (t->tv_sec <= -1 || t->tv_sec > 100000000 || 794 t->tv_usec <= -1 || t->tv_usec > 1000000); 795} 796 797static int 798__msgread(int sock, void *buf, size_t cnt) 799{ 800 struct iovec iov[1]; 801 struct msghdr msg; 802 union { 803 struct cmsghdr cmsg; 804 char control[CMSG_SPACE(sizeof(struct cmsgcred))]; 805 } cm; 806 807 bzero((char *)&cm, sizeof(cm)); 808 iov[0].iov_base = buf; 809 iov[0].iov_len = cnt; 810 811 msg.msg_iov = iov; 812 msg.msg_iovlen = 1; 813 msg.msg_name = NULL; 814 msg.msg_namelen = 0; 815 msg.msg_control = (caddr_t)&cm; 816 msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred)); 817 msg.msg_flags = 0; 818 819 return(_recvmsg(sock, &msg, 0)); 820} 821 822static int 823__msgwrite(int sock, void *buf, size_t cnt) 824{ 825 struct iovec iov[1]; 826 struct msghdr msg; 827 union { 828 struct cmsghdr cmsg; 829 char control[CMSG_SPACE(sizeof(struct cmsgcred))]; 830 } cm; 831 832 bzero((char *)&cm, sizeof(cm)); 833 iov[0].iov_base = buf; 834 iov[0].iov_len = cnt; 835 836 cm.cmsg.cmsg_type = SCM_CREDS; 837 cm.cmsg.cmsg_level = SOL_SOCKET; 838 cm.cmsg.cmsg_len = CMSG_LEN(sizeof(struct cmsgcred)); 839 840 msg.msg_iov = iov; 841 msg.msg_iovlen = 1; 842 msg.msg_name = NULL; 843 msg.msg_namelen = 0; 844 msg.msg_control = (caddr_t)&cm; 845 msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred)); 846 msg.msg_flags = 0; 847 848 return(_sendmsg(sock, &msg, 0)); 849} 850