1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 /* 28 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 29 */ 30 31 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 32 /* All Rights Reserved */ 33 /* 34 * Portions of this source code were derived from Berkeley 35 * 4.3 BSD under license from the Regents of the University of 36 * California. 37 */ 38 /* 39 * Copyright 2014 Shruti V Sampat <shrutisampat@gmail.com> 40 */ 41 42 /* 43 * Implements a connectionless client side RPC. 44 */ 45 46 #include "mt.h" 47 #include "rpc_mt.h" 48 #include <assert.h> 49 #include <rpc/rpc.h> 50 #include <errno.h> 51 #include <sys/poll.h> 52 #include <syslog.h> 53 #include <sys/types.h> 54 #include <sys/kstat.h> 55 #include <sys/time.h> 56 #include <stdlib.h> 57 #include <unistd.h> 58 #include <sys/types.h> 59 #include <sys/stat.h> 60 #include <strings.h> 61 #include <note.h> 62 63 extern int __rpc_timeval_to_msec(struct timeval *); 64 extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *); 65 extern bool_t __rpc_gss_wrap(AUTH *, char *, uint_t, XDR *, bool_t (*)(), 66 caddr_t); 67 extern bool_t __rpc_gss_unwrap(AUTH *, XDR *, bool_t (*)(), caddr_t); 68 69 70 static struct clnt_ops *clnt_dg_ops(void); 71 static bool_t time_not_ok(struct timeval *); 72 73 /* 74 * This machinery implements per-fd locks for MT-safety. It is not 75 * sufficient to do per-CLIENT handle locks for MT-safety because a 76 * user may create more than one CLIENT handle with the same fd behind 77 * it. 78 * 79 * The current implementation holds locks across the entire RPC and reply, 80 * including retransmissions. Yes, this is silly, and as soon as this 81 * code is proven to work, this should be the first thing fixed. One step 82 * at a time. 83 */ 84 85 /* 86 * FD Lock handle used by various MT sync. routines 87 */ 88 static mutex_t dgtbl_lock = DEFAULTMUTEX; 89 static void *dgtbl = NULL; 90 91 static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 92 93 94 #define MCALL_MSG_SIZE 24 95 96 /* 97 * Private data kept per client handle 98 */ 99 struct cu_data { 100 int cu_fd; /* connections fd */ 101 bool_t cu_closeit; /* opened by library */ 102 struct netbuf cu_raddr; /* remote address */ 103 struct timeval cu_wait; /* retransmit interval */ 104 struct timeval cu_total; /* total time for the call */ 105 struct rpc_err cu_error; 106 struct t_unitdata *cu_tr_data; 107 XDR cu_outxdrs; 108 char *cu_outbuf_start; 109 char cu_outbuf[MCALL_MSG_SIZE]; 110 uint_t cu_xdrpos; 111 uint_t cu_sendsz; /* send size */ 112 uint_t cu_recvsz; /* recv size */ 113 struct pollfd pfdp; 114 char cu_inbuf[1]; 115 }; 116 117 static int _rcv_unitdata_err(struct cu_data *cu); 118 119 /* 120 * Connection less client creation returns with client handle parameters. 121 * Default options are set, which the user can change using clnt_control(). 122 * fd should be open and bound. 123 * NB: The rpch->cl_auth is initialized to null authentication. 124 * Caller may wish to set this something more useful. 125 * 126 * sendsz and recvsz are the maximum allowable packet sizes that can be 127 * sent and received. Normally they are the same, but they can be 128 * changed to improve the program efficiency and buffer allocation. 129 * If they are 0, use the transport default. 130 * 131 * If svcaddr is NULL, returns NULL. 132 */ 133 CLIENT * 134 clnt_dg_create(const int fd, struct netbuf *svcaddr, const rpcprog_t program, 135 const rpcvers_t version, const uint_t sendsz, const uint_t recvsz) 136 { 137 CLIENT *cl = NULL; /* client handle */ 138 struct cu_data *cu = NULL; /* private data */ 139 struct t_unitdata *tr_data; 140 struct t_info tinfo; 141 struct timeval now; 142 struct rpc_msg call_msg; 143 uint_t ssz; 144 uint_t rsz; 145 146 sig_mutex_lock(&dgtbl_lock); 147 if ((dgtbl == NULL) && ((dgtbl = rpc_fd_init()) == NULL)) { 148 sig_mutex_unlock(&dgtbl_lock); 149 goto err1; 150 } 151 sig_mutex_unlock(&dgtbl_lock); 152 153 if (svcaddr == NULL) { 154 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 155 return (NULL); 156 } 157 if (t_getinfo(fd, &tinfo) == -1) { 158 rpc_createerr.cf_stat = RPC_TLIERROR; 159 rpc_createerr.cf_error.re_errno = 0; 160 rpc_createerr.cf_error.re_terrno = t_errno; 161 return (NULL); 162 } 163 /* 164 * Setup to rcv datagram error, we ignore any errors returned from 165 * __rpc_tli_set_options() as SO_DGRAM_ERRIND is only relevant to 166 * udp/udp6 transports and this point in the code we only know that 167 * we are using a connection less transport. 168 */ 169 if (tinfo.servtype == T_CLTS) 170 (void) __rpc_tli_set_options(fd, SOL_SOCKET, SO_DGRAM_ERRIND, 171 1); 172 /* 173 * Find the receive and the send size 174 */ 175 ssz = __rpc_get_t_size((int)sendsz, tinfo.tsdu); 176 rsz = __rpc_get_t_size((int)recvsz, tinfo.tsdu); 177 if ((ssz == 0) || (rsz == 0)) { 178 rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 179 rpc_createerr.cf_error.re_errno = 0; 180 rpc_createerr.cf_error.re_terrno = 0; 181 return (NULL); 182 } 183 184 if ((cl = malloc(sizeof (CLIENT))) == NULL) 185 goto err1; 186 /* 187 * Should be multiple of 4 for XDR. 188 */ 189 ssz = ((ssz + 3) / 4) * 4; 190 rsz = ((rsz + 3) / 4) * 4; 191 cu = malloc(sizeof (*cu) + ssz + rsz); 192 if (cu == NULL) 193 goto err1; 194 if ((cu->cu_raddr.buf = malloc(svcaddr->len)) == NULL) 195 goto err1; 196 (void) memcpy(cu->cu_raddr.buf, svcaddr->buf, (size_t)svcaddr->len); 197 cu->cu_raddr.len = cu->cu_raddr.maxlen = svcaddr->len; 198 cu->cu_outbuf_start = &cu->cu_inbuf[rsz]; 199 /* Other values can also be set through clnt_control() */ 200 cu->cu_wait.tv_sec = 15; /* heuristically chosen */ 201 cu->cu_wait.tv_usec = 0; 202 cu->cu_total.tv_sec = -1; 203 cu->cu_total.tv_usec = -1; 204 cu->cu_sendsz = ssz; 205 cu->cu_recvsz = rsz; 206 (void) gettimeofday(&now, NULL); 207 call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec; 208 call_msg.rm_call.cb_prog = program; 209 call_msg.rm_call.cb_vers = version; 210 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf, ssz, XDR_ENCODE); 211 if (!xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) { 212 rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ 213 rpc_createerr.cf_error.re_errno = 0; 214 rpc_createerr.cf_error.re_terrno = 0; 215 goto err2; 216 } 217 cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs)); 218 XDR_DESTROY(&(cu->cu_outxdrs)); 219 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf_start, ssz, XDR_ENCODE); 220 /* LINTED pointer alignment */ 221 tr_data = (struct t_unitdata *)t_alloc(fd, T_UNITDATA, T_ADDR | T_OPT); 222 if (tr_data == NULL) { 223 goto err1; 224 } 225 tr_data->udata.maxlen = cu->cu_recvsz; 226 tr_data->udata.buf = cu->cu_inbuf; 227 cu->cu_tr_data = tr_data; 228 229 /* 230 * By default, closeit is always FALSE. It is users responsibility 231 * to do a t_close on it, else the user may use clnt_control 232 * to let clnt_destroy do it for him/her. 233 */ 234 cu->cu_closeit = FALSE; 235 cu->cu_fd = fd; 236 cl->cl_ops = clnt_dg_ops(); 237 cl->cl_private = (caddr_t)cu; 238 cl->cl_auth = authnone_create(); 239 cl->cl_tp = NULL; 240 cl->cl_netid = NULL; 241 cu->pfdp.fd = cu->cu_fd; 242 cu->pfdp.events = MASKVAL; 243 return (cl); 244 err1: 245 (void) syslog(LOG_ERR, mem_err_clnt_dg); 246 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 247 rpc_createerr.cf_error.re_errno = errno; 248 rpc_createerr.cf_error.re_terrno = 0; 249 err2: 250 if (cl) { 251 free(cl); 252 if (cu) { 253 free(cu->cu_raddr.buf); 254 free(cu); 255 } 256 } 257 return (NULL); 258 } 259 260 static enum clnt_stat 261 clnt_dg_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, caddr_t argsp, 262 xdrproc_t xresults, caddr_t resultsp, struct timeval utimeout) 263 { 264 /* LINTED pointer alignment */ 265 struct cu_data *cu = (struct cu_data *)cl->cl_private; 266 XDR *xdrs; 267 int outlen; 268 struct rpc_msg reply_msg; 269 XDR reply_xdrs; 270 struct timeval time_waited; 271 bool_t ok; 272 int nrefreshes = 2; /* number of times to refresh cred */ 273 struct timeval timeout; 274 struct timeval retransmit_time; 275 struct timeval poll_time; 276 struct timeval startime, curtime; 277 struct t_unitdata tu_data; 278 int res; /* result of operations */ 279 uint32_t x_id; 280 281 if (rpc_fd_lock(dgtbl, cu->cu_fd)) { 282 rpc_callerr.re_status = RPC_FAILED; 283 rpc_callerr.re_errno = errno; 284 rpc_fd_unlock(dgtbl, cu->cu_fd); 285 return (RPC_FAILED); 286 } 287 288 if (cu->cu_total.tv_usec == -1) { 289 timeout = utimeout; /* use supplied timeout */ 290 } else { 291 timeout = cu->cu_total; /* use default timeout */ 292 } 293 294 time_waited.tv_sec = 0; 295 time_waited.tv_usec = 0; 296 retransmit_time = cu->cu_wait; 297 298 tu_data.addr = cu->cu_raddr; 299 300 call_again: 301 xdrs = &(cu->cu_outxdrs); 302 xdrs->x_op = XDR_ENCODE; 303 XDR_SETPOS(xdrs, 0); 304 /* 305 * Due to little endian byte order, it is necessary to convert to host 306 * format before incrementing xid. 307 */ 308 /* LINTED pointer cast */ 309 x_id = ntohl(*(uint32_t *)(cu->cu_outbuf)) + 1; /* set XID */ 310 /* LINTED pointer cast */ 311 *(uint32_t *)cu->cu_outbuf = htonl(x_id); 312 313 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 314 if ((!XDR_PUTBYTES(xdrs, cu->cu_outbuf, cu->cu_xdrpos)) || 315 (!XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 316 (!AUTH_MARSHALL(cl->cl_auth, xdrs)) || 317 (!xargs(xdrs, argsp))) { 318 rpc_fd_unlock(dgtbl, cu->cu_fd); 319 return (rpc_callerr.re_status = RPC_CANTENCODEARGS); 320 } 321 } else { 322 /* LINTED pointer alignment */ 323 uint32_t *u = (uint32_t *)&cu->cu_outbuf[cu->cu_xdrpos]; 324 IXDR_PUT_U_INT32(u, proc); 325 if (!__rpc_gss_wrap(cl->cl_auth, cu->cu_outbuf, 326 ((char *)u) - cu->cu_outbuf, xdrs, xargs, argsp)) { 327 rpc_fd_unlock(dgtbl, cu->cu_fd); 328 return (rpc_callerr.re_status = RPC_CANTENCODEARGS); 329 } 330 } 331 outlen = (int)XDR_GETPOS(xdrs); 332 333 send_again: 334 tu_data.udata.buf = cu->cu_outbuf_start; 335 tu_data.udata.len = outlen; 336 tu_data.opt.len = 0; 337 if (t_sndudata(cu->cu_fd, &tu_data) == -1) { 338 rpc_callerr.re_terrno = t_errno; 339 rpc_callerr.re_errno = errno; 340 rpc_fd_unlock(dgtbl, cu->cu_fd); 341 return (rpc_callerr.re_status = RPC_CANTSEND); 342 } 343 344 /* 345 * Hack to provide rpc-based message passing 346 */ 347 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 348 rpc_fd_unlock(dgtbl, cu->cu_fd); 349 return (rpc_callerr.re_status = RPC_TIMEDOUT); 350 } 351 /* 352 * sub-optimal code appears here because we have 353 * some clock time to spare while the packets are in flight. 354 * (We assume that this is actually only executed once.) 355 */ 356 reply_msg.acpted_rply.ar_verf = _null_auth; 357 reply_msg.acpted_rply.ar_results.where = NULL; 358 reply_msg.acpted_rply.ar_results.proc = xdr_void; 359 360 /* 361 * Set polling time so that we don't wait for 362 * longer than specified by the total time to wait, 363 * or the retransmit time. 364 */ 365 poll_time.tv_sec = timeout.tv_sec - time_waited.tv_sec; 366 poll_time.tv_usec = timeout.tv_usec - time_waited.tv_usec; 367 while (poll_time.tv_usec < 0) { 368 poll_time.tv_usec += 1000000; 369 poll_time.tv_sec--; 370 } 371 372 if (poll_time.tv_sec < 0 || (poll_time.tv_sec == 0 && 373 poll_time.tv_usec == 0)) { 374 /* 375 * this could happen if time_waited >= timeout 376 */ 377 rpc_fd_unlock(dgtbl, cu->cu_fd); 378 return (rpc_callerr.re_status = RPC_TIMEDOUT); 379 } 380 381 if (poll_time.tv_sec > retransmit_time.tv_sec || 382 (poll_time.tv_sec == retransmit_time.tv_sec && 383 poll_time.tv_usec > retransmit_time.tv_usec)) 384 poll_time = retransmit_time; 385 386 387 for (;;) { 388 389 (void) gettimeofday(&startime, NULL); 390 391 switch (poll(&cu->pfdp, 1, 392 __rpc_timeval_to_msec(&poll_time))) { 393 case -1: 394 if (errno != EINTR && errno != EAGAIN) { 395 rpc_callerr.re_errno = errno; 396 rpc_callerr.re_terrno = 0; 397 rpc_fd_unlock(dgtbl, cu->cu_fd); 398 return (rpc_callerr.re_status = RPC_CANTRECV); 399 } 400 /*FALLTHROUGH*/ 401 402 case 0: 403 /* 404 * update time waited 405 */ 406 timeout: (void) gettimeofday(&curtime, NULL); 407 time_waited.tv_sec += curtime.tv_sec - startime.tv_sec; 408 time_waited.tv_usec += curtime.tv_usec - 409 startime.tv_usec; 410 while (time_waited.tv_usec >= 1000000) { 411 time_waited.tv_usec -= 1000000; 412 time_waited.tv_sec++; 413 } 414 while (time_waited.tv_usec < 0) { 415 time_waited.tv_usec += 1000000; 416 time_waited.tv_sec--; 417 } 418 419 /* 420 * decrement time left to poll by same amount 421 */ 422 poll_time.tv_sec -= curtime.tv_sec - startime.tv_sec; 423 poll_time.tv_usec -= curtime.tv_usec - startime.tv_usec; 424 while (poll_time.tv_usec >= 1000000) { 425 poll_time.tv_usec -= 1000000; 426 poll_time.tv_sec++; 427 } 428 while (poll_time.tv_usec < 0) { 429 poll_time.tv_usec += 1000000; 430 poll_time.tv_sec--; 431 } 432 433 /* 434 * if there's time left to poll, poll again 435 */ 436 if (poll_time.tv_sec > 0 || 437 (poll_time.tv_sec == 0 && poll_time.tv_usec > 0)) 438 continue; 439 440 /* 441 * if there's more time left, retransmit; 442 * otherwise, return timeout error 443 */ 444 if (time_waited.tv_sec < timeout.tv_sec || 445 (time_waited.tv_sec == timeout.tv_sec && 446 time_waited.tv_usec < timeout.tv_usec)) { 447 /* 448 * update retransmit_time 449 */ 450 retransmit_time.tv_usec *= 2; 451 retransmit_time.tv_sec *= 2; 452 while (retransmit_time.tv_usec >= 1000000) { 453 retransmit_time.tv_usec -= 1000000; 454 retransmit_time.tv_sec++; 455 } 456 if (retransmit_time.tv_sec >= RPC_MAX_BACKOFF) { 457 retransmit_time.tv_sec = 458 RPC_MAX_BACKOFF; 459 retransmit_time.tv_usec = 0; 460 } 461 /* 462 * redo AUTH_MARSHAL if AUTH_DES or RPCSEC_GSS. 463 */ 464 if (cl->cl_auth->ah_cred.oa_flavor == 465 AUTH_DES || 466 cl->cl_auth->ah_cred.oa_flavor == 467 RPCSEC_GSS) 468 goto call_again; 469 else 470 goto send_again; 471 } 472 rpc_fd_unlock(dgtbl, cu->cu_fd); 473 return (rpc_callerr.re_status = RPC_TIMEDOUT); 474 475 default: 476 break; 477 } 478 479 if (cu->pfdp.revents & POLLNVAL || (cu->pfdp.revents == 0)) { 480 rpc_callerr.re_status = RPC_CANTRECV; 481 /* 482 * Note: we're faking errno here because we 483 * previously would have expected select() to 484 * return -1 with errno EBADF. Poll(BA_OS) 485 * returns 0 and sets the POLLNVAL revents flag 486 * instead. 487 */ 488 rpc_callerr.re_errno = errno = EBADF; 489 rpc_fd_unlock(dgtbl, cu->cu_fd); 490 return (-1); 491 } 492 493 /* We have some data now */ 494 do { 495 int moreflag; /* flag indicating more data */ 496 497 moreflag = 0; 498 499 res = t_rcvudata(cu->cu_fd, cu->cu_tr_data, &moreflag); 500 501 if (moreflag & T_MORE) { 502 /* 503 * Drop this packet. I aint got any 504 * more space. 505 */ 506 res = -1; 507 /* I should not really be doing this */ 508 errno = 0; 509 /* 510 * XXX: Not really Buffer overflow in the 511 * sense of TLI. 512 */ 513 t_errno = TBUFOVFLW; 514 } 515 } while (res < 0 && (t_errno == TSYSERR && errno == EINTR)); 516 if (res < 0) { 517 int err, errnoflag = FALSE; 518 #ifdef sun 519 if (t_errno == TSYSERR && errno == EWOULDBLOCK) 520 #else 521 if (t_errno == TSYSERR && errno == EAGAIN) 522 #endif 523 continue; 524 if (t_errno == TLOOK) { 525 if ((err = _rcv_unitdata_err(cu)) == 0) 526 continue; 527 else if (err == 1) 528 errnoflag = TRUE; 529 } else { 530 rpc_callerr.re_terrno = t_errno; 531 } 532 if (errnoflag == FALSE) 533 rpc_callerr.re_errno = errno; 534 rpc_fd_unlock(dgtbl, cu->cu_fd); 535 return (rpc_callerr.re_status = RPC_CANTRECV); 536 } 537 if (cu->cu_tr_data->udata.len < (uint_t)sizeof (uint32_t)) 538 continue; 539 /* see if reply transaction id matches sent id */ 540 /* LINTED pointer alignment */ 541 if (*((uint32_t *)(cu->cu_inbuf)) != 542 /* LINTED pointer alignment */ 543 *((uint32_t *)(cu->cu_outbuf))) 544 goto timeout; 545 /* we now assume we have the proper reply */ 546 break; 547 } 548 549 /* 550 * now decode and validate the response 551 */ 552 553 xdrmem_create(&reply_xdrs, cu->cu_inbuf, 554 (uint_t)cu->cu_tr_data->udata.len, XDR_DECODE); 555 ok = xdr_replymsg(&reply_xdrs, &reply_msg); 556 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ 557 if (ok) { 558 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 559 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 560 rpc_callerr.re_status = RPC_SUCCESS; 561 else 562 __seterr_reply(&reply_msg, &(rpc_callerr)); 563 564 if (rpc_callerr.re_status == RPC_SUCCESS) { 565 if (!AUTH_VALIDATE(cl->cl_auth, 566 &reply_msg.acpted_rply.ar_verf)) { 567 rpc_callerr.re_status = RPC_AUTHERROR; 568 rpc_callerr.re_why = AUTH_INVALIDRESP; 569 } else if (cl->cl_auth->ah_cred.oa_flavor != 570 RPCSEC_GSS) { 571 if (!(*xresults)(&reply_xdrs, resultsp)) { 572 if (rpc_callerr.re_status == 573 RPC_SUCCESS) 574 rpc_callerr.re_status = 575 RPC_CANTDECODERES; 576 } 577 } else if (!__rpc_gss_unwrap(cl->cl_auth, &reply_xdrs, 578 xresults, resultsp)) { 579 if (rpc_callerr.re_status == RPC_SUCCESS) 580 rpc_callerr.re_status = 581 RPC_CANTDECODERES; 582 } 583 } /* end successful completion */ 584 /* 585 * If unsuccesful AND error is an authentication error 586 * then refresh credentials and try again, else break 587 */ 588 else if (rpc_callerr.re_status == RPC_AUTHERROR) 589 /* maybe our credentials need to be refreshed ... */ 590 if (nrefreshes-- && 591 AUTH_REFRESH(cl->cl_auth, &reply_msg)) 592 goto call_again; 593 else 594 /* 595 * We are setting rpc_callerr here given that 596 * libnsl is not reentrant thereby 597 * reinitializing the TSD. If not set here then 598 * success could be returned even though refresh 599 * failed. 600 */ 601 rpc_callerr.re_status = RPC_AUTHERROR; 602 603 /* end of unsuccessful completion */ 604 /* free verifier */ 605 if (reply_msg.rm_reply.rp_stat == MSG_ACCEPTED && 606 reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 607 xdrs->x_op = XDR_FREE; 608 (void) xdr_opaque_auth(xdrs, 609 &(reply_msg.acpted_rply.ar_verf)); 610 } 611 } /* end of valid reply message */ 612 else { 613 rpc_callerr.re_status = RPC_CANTDECODERES; 614 615 } 616 rpc_fd_unlock(dgtbl, cu->cu_fd); 617 return (rpc_callerr.re_status); 618 } 619 620 static enum clnt_stat 621 clnt_dg_send(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, caddr_t argsp) 622 { 623 /* LINTED pointer alignment */ 624 struct cu_data *cu = (struct cu_data *)cl->cl_private; 625 XDR *xdrs; 626 int outlen; 627 struct t_unitdata tu_data; 628 uint32_t x_id; 629 630 if (rpc_fd_lock(dgtbl, cu->cu_fd)) { 631 rpc_callerr.re_status = RPC_FAILED; 632 rpc_callerr.re_errno = errno; 633 rpc_fd_unlock(dgtbl, cu->cu_fd); 634 return (RPC_FAILED); 635 } 636 637 tu_data.addr = cu->cu_raddr; 638 639 xdrs = &(cu->cu_outxdrs); 640 xdrs->x_op = XDR_ENCODE; 641 XDR_SETPOS(xdrs, 0); 642 /* 643 * Due to little endian byte order, it is necessary to convert to host 644 * format before incrementing xid. 645 */ 646 /* LINTED pointer alignment */ 647 x_id = ntohl(*(uint32_t *)(cu->cu_outbuf)) + 1; /* set XID */ 648 /* LINTED pointer cast */ 649 *(uint32_t *)cu->cu_outbuf = htonl(x_id); 650 651 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 652 if ((!XDR_PUTBYTES(xdrs, cu->cu_outbuf, cu->cu_xdrpos)) || 653 (!XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 654 (!AUTH_MARSHALL(cl->cl_auth, xdrs)) || 655 (!xargs(xdrs, argsp))) { 656 rpc_fd_unlock(dgtbl, cu->cu_fd); 657 return (rpc_callerr.re_status = RPC_CANTENCODEARGS); 658 } 659 } else { 660 /* LINTED pointer alignment */ 661 uint32_t *u = (uint32_t *)&cu->cu_outbuf[cu->cu_xdrpos]; 662 IXDR_PUT_U_INT32(u, proc); 663 if (!__rpc_gss_wrap(cl->cl_auth, cu->cu_outbuf, 664 ((char *)u) - cu->cu_outbuf, xdrs, xargs, argsp)) { 665 rpc_fd_unlock(dgtbl, cu->cu_fd); 666 return (rpc_callerr.re_status = RPC_CANTENCODEARGS); 667 } 668 } 669 outlen = (int)XDR_GETPOS(xdrs); 670 671 tu_data.udata.buf = cu->cu_outbuf_start; 672 tu_data.udata.len = outlen; 673 tu_data.opt.len = 0; 674 if (t_sndudata(cu->cu_fd, &tu_data) == -1) { 675 rpc_callerr.re_terrno = t_errno; 676 rpc_callerr.re_errno = errno; 677 rpc_fd_unlock(dgtbl, cu->cu_fd); 678 return (rpc_callerr.re_status = RPC_CANTSEND); 679 } 680 681 rpc_fd_unlock(dgtbl, cu->cu_fd); 682 return (rpc_callerr.re_status = RPC_SUCCESS); 683 } 684 685 static void 686 clnt_dg_geterr(CLIENT *cl, struct rpc_err *errp) 687 { 688 NOTE(ARGUNUSED(cl)) 689 *errp = rpc_callerr; 690 } 691 692 static bool_t 693 clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr) 694 { 695 /* LINTED pointer alignment */ 696 struct cu_data *cu = (struct cu_data *)cl->cl_private; 697 XDR *xdrs = &(cu->cu_outxdrs); 698 bool_t stat; 699 700 (void) rpc_fd_lock(dgtbl, cu->cu_fd); 701 xdrs->x_op = XDR_FREE; 702 stat = (*xdr_res)(xdrs, res_ptr); 703 rpc_fd_unlock(dgtbl, cu->cu_fd); 704 return (stat); 705 } 706 707 /* ARGSUSED */ 708 static void 709 clnt_dg_abort(CLIENT *h) 710 { 711 } 712 713 static bool_t 714 clnt_dg_control(CLIENT *cl, int request, char *info) 715 { 716 /* LINTED pointer alignment */ 717 struct cu_data *cu = (struct cu_data *)cl->cl_private; 718 struct netbuf *addr; 719 if (rpc_fd_lock(dgtbl, cu->cu_fd)) { 720 rpc_fd_unlock(dgtbl, cu->cu_fd); 721 return (FALSE); 722 } 723 724 switch (request) { 725 case CLSET_FD_CLOSE: 726 cu->cu_closeit = TRUE; 727 rpc_fd_unlock(dgtbl, cu->cu_fd); 728 return (TRUE); 729 case CLSET_FD_NCLOSE: 730 cu->cu_closeit = FALSE; 731 rpc_fd_unlock(dgtbl, cu->cu_fd); 732 return (TRUE); 733 } 734 735 /* for other requests which use info */ 736 if (info == NULL) { 737 rpc_fd_unlock(dgtbl, cu->cu_fd); 738 return (FALSE); 739 } 740 switch (request) { 741 case CLSET_TIMEOUT: 742 /* LINTED pointer alignment */ 743 if (time_not_ok((struct timeval *)info)) { 744 rpc_fd_unlock(dgtbl, cu->cu_fd); 745 return (FALSE); 746 } 747 /* LINTED pointer alignment */ 748 cu->cu_total = *(struct timeval *)info; 749 break; 750 case CLGET_TIMEOUT: 751 /* LINTED pointer alignment */ 752 *(struct timeval *)info = cu->cu_total; 753 break; 754 case CLGET_SERVER_ADDR: /* Give him the fd address */ 755 /* Now obsolete. Only for backword compatibility */ 756 (void) memcpy(info, cu->cu_raddr.buf, (size_t)cu->cu_raddr.len); 757 break; 758 case CLSET_RETRY_TIMEOUT: 759 /* LINTED pointer alignment */ 760 if (time_not_ok((struct timeval *)info)) { 761 rpc_fd_unlock(dgtbl, cu->cu_fd); 762 return (FALSE); 763 } 764 /* LINTED pointer alignment */ 765 cu->cu_wait = *(struct timeval *)info; 766 break; 767 case CLGET_RETRY_TIMEOUT: 768 /* LINTED pointer alignment */ 769 *(struct timeval *)info = cu->cu_wait; 770 break; 771 case CLGET_FD: 772 /* LINTED pointer alignment */ 773 *(int *)info = cu->cu_fd; 774 break; 775 case CLGET_SVC_ADDR: 776 /* LINTED pointer alignment */ 777 *(struct netbuf *)info = cu->cu_raddr; 778 break; 779 case CLSET_SVC_ADDR: /* set to new address */ 780 /* LINTED pointer alignment */ 781 addr = (struct netbuf *)info; 782 if (cu->cu_raddr.maxlen < addr->len) { 783 free(cu->cu_raddr.buf); 784 if ((cu->cu_raddr.buf = malloc(addr->len)) == NULL) { 785 rpc_fd_unlock(dgtbl, cu->cu_fd); 786 return (FALSE); 787 } 788 cu->cu_raddr.maxlen = addr->len; 789 } 790 cu->cu_raddr.len = addr->len; 791 (void) memcpy(cu->cu_raddr.buf, addr->buf, addr->len); 792 break; 793 case CLGET_XID: 794 /* 795 * use the knowledge that xid is the 796 * first element in the call structure *. 797 * This will get the xid of the PREVIOUS call 798 */ 799 /* LINTED pointer alignment */ 800 *(uint32_t *)info = ntohl(*(uint32_t *)cu->cu_outbuf); 801 break; 802 803 case CLSET_XID: 804 /* This will set the xid of the NEXT call */ 805 /* LINTED pointer alignment */ 806 *(uint32_t *)cu->cu_outbuf = htonl(*(uint32_t *)info - 1); 807 /* decrement by 1 as clnt_dg_call() increments once */ 808 break; 809 810 case CLGET_VERS: 811 /* 812 * This RELIES on the information that, in the call body, 813 * the version number field is the fifth field from the 814 * begining of the RPC header. MUST be changed if the 815 * call_struct is changed 816 */ 817 /* LINTED pointer alignment */ 818 *(uint32_t *)info = ntohl(*(uint32_t *)(cu->cu_outbuf + 819 4 * BYTES_PER_XDR_UNIT)); 820 break; 821 822 case CLSET_VERS: 823 /* LINTED pointer alignment */ 824 *(uint32_t *)(cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT) = 825 /* LINTED pointer alignment */ 826 htonl(*(uint32_t *)info); 827 break; 828 829 case CLGET_PROG: 830 /* 831 * This RELIES on the information that, in the call body, 832 * the program number field is the fourth field from the 833 * begining of the RPC header. MUST be changed if the 834 * call_struct is changed 835 */ 836 /* LINTED pointer alignment */ 837 *(uint32_t *)info = ntohl(*(uint32_t *)(cu->cu_outbuf + 838 3 * BYTES_PER_XDR_UNIT)); 839 break; 840 841 case CLSET_PROG: 842 /* LINTED pointer alignment */ 843 *(uint32_t *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT) = 844 /* LINTED pointer alignment */ 845 htonl(*(uint32_t *)info); 846 break; 847 848 default: 849 rpc_fd_unlock(dgtbl, cu->cu_fd); 850 return (FALSE); 851 } 852 rpc_fd_unlock(dgtbl, cu->cu_fd); 853 return (TRUE); 854 } 855 856 static void 857 clnt_dg_destroy(CLIENT *cl) 858 { 859 /* LINTED pointer alignment */ 860 struct cu_data *cu = (struct cu_data *)cl->cl_private; 861 int cu_fd = cu->cu_fd; 862 863 (void) rpc_fd_lock(dgtbl, cu_fd); 864 if (cu->cu_closeit) 865 (void) t_close(cu_fd); 866 XDR_DESTROY(&(cu->cu_outxdrs)); 867 cu->cu_tr_data->udata.buf = NULL; 868 (void) t_free((char *)cu->cu_tr_data, T_UNITDATA); 869 free(cu->cu_raddr.buf); 870 free(cu); 871 if (cl->cl_netid && cl->cl_netid[0]) 872 free(cl->cl_netid); 873 if (cl->cl_tp && cl->cl_tp[0]) 874 free(cl->cl_tp); 875 free(cl); 876 rpc_fd_unlock(dgtbl, cu_fd); 877 } 878 879 static struct clnt_ops * 880 clnt_dg_ops(void) 881 { 882 static struct clnt_ops ops; 883 extern mutex_t ops_lock; 884 885 /* VARIABLES PROTECTED BY ops_lock: ops */ 886 887 sig_mutex_lock(&ops_lock); 888 if (ops.cl_call == NULL) { 889 ops.cl_call = clnt_dg_call; 890 ops.cl_send = clnt_dg_send; 891 ops.cl_abort = clnt_dg_abort; 892 ops.cl_geterr = clnt_dg_geterr; 893 ops.cl_freeres = clnt_dg_freeres; 894 ops.cl_destroy = clnt_dg_destroy; 895 ops.cl_control = clnt_dg_control; 896 } 897 sig_mutex_unlock(&ops_lock); 898 return (&ops); 899 } 900 901 /* 902 * Make sure that the time is not garbage. -1 value is allowed. 903 */ 904 static bool_t 905 time_not_ok(struct timeval *t) 906 { 907 return (t->tv_sec < -1 || t->tv_sec > 100000000 || 908 t->tv_usec < -1 || t->tv_usec > 1000000); 909 } 910 911 /* 912 * Receive a unit data error indication. 913 * Below even when t_alloc() fails we pass uderr=NULL to t_rcvuderr() 914 * so as to just clear the error indication. 915 */ 916 917 static int 918 _rcv_unitdata_err(struct cu_data *cu) 919 { 920 int old; 921 struct t_uderr *uderr; 922 923 old = t_errno; 924 /* LINTED pointer cast */ 925 uderr = (struct t_uderr *)t_alloc(cu->cu_fd, T_UDERROR, T_ADDR); 926 927 if (t_rcvuderr(cu->cu_fd, uderr) == 0) { 928 if (uderr == NULL) 929 return (0); 930 931 if (uderr->addr.len != cu->cu_raddr.len || 932 (memcmp(uderr->addr.buf, cu->cu_raddr.buf, 933 cu->cu_raddr.len))) { 934 (void) t_free((char *)uderr, T_UDERROR); 935 return (0); 936 } 937 rpc_callerr.re_errno = uderr->error; 938 rpc_callerr.re_terrno = TSYSERR; 939 (void) t_free((char *)uderr, T_UDERROR); 940 return (1); 941 } 942 rpc_callerr.re_terrno = old; 943 if (uderr) 944 (void) t_free((char *)uderr, T_UDERROR); 945 return (-1); 946 } 947