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