1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 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 /* 34 * svc_vc.c, Server side for Connection Oriented based RPC. 35 * 36 * Actually implements two flavors of transporter - 37 * a tcp rendezvouser (a listner and connection establisher) 38 * and a record/tcp stream. 39 */ 40 41 #include "namespace.h" 42 #include "reentrant.h" 43 #include <sys/param.h> 44 #include <sys/poll.h> 45 #include <sys/socket.h> 46 #include <sys/un.h> 47 #include <sys/time.h> 48 #include <sys/uio.h> 49 #include <netinet/in.h> 50 #include <netinet/tcp.h> 51 52 #include <assert.h> 53 #include <err.h> 54 #include <errno.h> 55 #include <fcntl.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include <rpc/rpc.h> 62 63 #include "rpc_com.h" 64 #include "mt_misc.h" 65 #include "un-namespace.h" 66 67 static SVCXPRT *makefd_xprt(int, u_int, u_int); 68 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 69 static enum xprt_stat rendezvous_stat(SVCXPRT *); 70 static void svc_vc_destroy(SVCXPRT *); 71 static void __svc_vc_dodestroy (SVCXPRT *); 72 static int read_vc(void *, void *, int); 73 static int write_vc(void *, void *, int); 74 static enum xprt_stat svc_vc_stat(SVCXPRT *); 75 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 76 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 77 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 78 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 79 static void svc_vc_rendezvous_ops(SVCXPRT *); 80 static void svc_vc_ops(SVCXPRT *); 81 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 82 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 83 void *in); 84 85 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 86 u_int sendsize; 87 u_int recvsize; 88 int maxrec; 89 }; 90 91 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 92 enum xprt_stat strm_stat; 93 u_int32_t x_id; 94 XDR xdrs; 95 char verf_body[MAX_AUTH_BYTES]; 96 u_int sendsize; 97 u_int recvsize; 98 int maxrec; 99 bool_t nonblock; 100 struct timeval last_recv_time; 101 }; 102 103 /* 104 * Usage: 105 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 106 * 107 * Creates, registers, and returns a (rpc) tcp based transporter. 108 * Once *xprt is initialized, it is registered as a transporter 109 * see (svc.h, xprt_register). This routine returns 110 * a NULL if a problem occurred. 111 * 112 * The filedescriptor passed in is expected to refer to a bound, but 113 * not yet connected socket. 114 * 115 * Since streams do buffered io similar to stdio, the caller can specify 116 * how big the send and receive buffers are via the second and third parms; 117 * 0 => use the system default. 118 */ 119 SVCXPRT * 120 svc_vc_create(int fd, u_int sendsize, u_int recvsize) 121 { 122 SVCXPRT *xprt = NULL; 123 struct cf_rendezvous *r = NULL; 124 struct __rpc_sockinfo si; 125 struct sockaddr_storage sslocal; 126 socklen_t slen; 127 128 if (!__rpc_fd2sockinfo(fd, &si)) 129 return NULL; 130 131 r = mem_alloc(sizeof(*r)); 132 if (r == NULL) { 133 warnx("svc_vc_create: out of memory"); 134 goto cleanup_svc_vc_create; 135 } 136 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 137 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 138 r->maxrec = __svc_maxrec; 139 xprt = svc_xprt_alloc(); 140 if (xprt == NULL) { 141 warnx("svc_vc_create: out of memory"); 142 goto cleanup_svc_vc_create; 143 } 144 xprt->xp_p1 = r; 145 xprt->xp_verf = _null_auth; 146 svc_vc_rendezvous_ops(xprt); 147 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 148 xprt->xp_fd = fd; 149 150 slen = sizeof (struct sockaddr_storage); 151 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 152 warnx("svc_vc_create: could not retrieve local addr"); 153 goto cleanup_svc_vc_create; 154 } 155 156 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 157 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 158 if (xprt->xp_ltaddr.buf == NULL) { 159 warnx("svc_vc_create: no mem for local addr"); 160 goto cleanup_svc_vc_create; 161 } 162 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 163 164 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 165 xprt_register(xprt); 166 return (xprt); 167 cleanup_svc_vc_create: 168 if (xprt) 169 mem_free(xprt, sizeof(*xprt)); 170 if (r != NULL) 171 mem_free(r, sizeof(*r)); 172 return (NULL); 173 } 174 175 /* 176 * Like svtcp_create(), except the routine takes any *open* UNIX file 177 * descriptor as its first input. 178 */ 179 SVCXPRT * 180 svc_fd_create(int fd, u_int sendsize, u_int recvsize) 181 { 182 struct sockaddr_storage ss; 183 socklen_t slen; 184 SVCXPRT *ret; 185 186 assert(fd != -1); 187 188 ret = makefd_xprt(fd, sendsize, recvsize); 189 if (ret == NULL) 190 return NULL; 191 192 slen = sizeof (struct sockaddr_storage); 193 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 194 warnx("svc_fd_create: could not retrieve local addr"); 195 goto freedata; 196 } 197 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 198 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 199 if (ret->xp_ltaddr.buf == NULL) { 200 warnx("svc_fd_create: no mem for local addr"); 201 goto freedata; 202 } 203 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 204 205 slen = sizeof (struct sockaddr_storage); 206 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 207 warnx("svc_fd_create: could not retrieve remote addr"); 208 goto freedata; 209 } 210 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 211 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 212 if (ret->xp_rtaddr.buf == NULL) { 213 warnx("svc_fd_create: no mem for local addr"); 214 goto freedata; 215 } 216 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 217 #ifdef PORTMAP 218 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 219 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 220 ret->xp_addrlen = sizeof (struct sockaddr_in); 221 } 222 #endif /* PORTMAP */ 223 224 return ret; 225 226 freedata: 227 if (ret->xp_ltaddr.buf != NULL) 228 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 229 230 return NULL; 231 } 232 233 static SVCXPRT * 234 makefd_xprt(int fd, u_int sendsize, u_int recvsize) 235 { 236 SVCXPRT *xprt; 237 struct cf_conn *cd; 238 const char *netid; 239 struct __rpc_sockinfo si; 240 241 assert(fd != -1); 242 243 xprt = svc_xprt_alloc(); 244 if (xprt == NULL) { 245 warnx("svc_vc: makefd_xprt: out of memory"); 246 goto done; 247 } 248 cd = mem_alloc(sizeof(struct cf_conn)); 249 if (cd == NULL) { 250 warnx("svc_tcp: makefd_xprt: out of memory"); 251 svc_xprt_free(xprt); 252 xprt = NULL; 253 goto done; 254 } 255 cd->strm_stat = XPRT_IDLE; 256 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 257 xprt, read_vc, write_vc); 258 xprt->xp_p1 = cd; 259 xprt->xp_verf.oa_base = cd->verf_body; 260 svc_vc_ops(xprt); /* truly deals with calls */ 261 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 262 xprt->xp_fd = fd; 263 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 264 xprt->xp_netid = strdup(netid); 265 266 xprt_register(xprt); 267 done: 268 return (xprt); 269 } 270 271 /*ARGSUSED*/ 272 static bool_t 273 rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg) 274 { 275 int sock, flags; 276 struct cf_rendezvous *r; 277 struct cf_conn *cd; 278 struct sockaddr_storage addr, sslocal; 279 socklen_t len, slen; 280 struct __rpc_sockinfo si; 281 SVCXPRT *newxprt; 282 fd_set cleanfds; 283 284 assert(xprt != NULL); 285 assert(msg != NULL); 286 287 r = (struct cf_rendezvous *)xprt->xp_p1; 288 again: 289 len = sizeof addr; 290 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 291 &len)) < 0) { 292 if (errno == EINTR) 293 goto again; 294 /* 295 * Clean out the most idle file descriptor when we're 296 * running out. 297 */ 298 if (errno == EMFILE || errno == ENFILE) { 299 cleanfds = svc_fdset; 300 __svc_clean_idle(&cleanfds, 0, FALSE); 301 goto again; 302 } 303 return (FALSE); 304 } 305 /* 306 * make a new transporter (re-uses xprt) 307 */ 308 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 309 newxprt->xp_rtaddr.buf = mem_alloc(len); 310 if (newxprt->xp_rtaddr.buf == NULL) 311 return (FALSE); 312 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 313 newxprt->xp_rtaddr.len = len; 314 #ifdef PORTMAP 315 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) { 316 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 317 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 318 } 319 #endif /* PORTMAP */ 320 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 321 len = 1; 322 /* XXX fvdl - is this useful? */ 323 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 324 } 325 326 cd = (struct cf_conn *)newxprt->xp_p1; 327 328 cd->recvsize = r->recvsize; 329 cd->sendsize = r->sendsize; 330 cd->maxrec = r->maxrec; 331 332 if (cd->maxrec != 0) { 333 flags = _fcntl(sock, F_GETFL, 0); 334 if (flags == -1) 335 return (FALSE); 336 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 337 return (FALSE); 338 if (cd->recvsize > cd->maxrec) 339 cd->recvsize = cd->maxrec; 340 cd->nonblock = TRUE; 341 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 342 } else 343 cd->nonblock = FALSE; 344 slen = sizeof(struct sockaddr_storage); 345 if(_getsockname(sock, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 346 warnx("svc_vc_create: could not retrieve local addr"); 347 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0; 348 } else { 349 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = sslocal.ss_len; 350 newxprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 351 if (newxprt->xp_ltaddr.buf == NULL) { 352 warnx("svc_vc_create: no mem for local addr"); 353 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0; 354 } else { 355 memcpy(newxprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 356 } 357 } 358 359 gettimeofday(&cd->last_recv_time, NULL); 360 361 return (FALSE); /* there is never an rpc msg to be processed */ 362 } 363 364 /*ARGSUSED*/ 365 static enum xprt_stat 366 rendezvous_stat(SVCXPRT *xprt) 367 { 368 369 return (XPRT_IDLE); 370 } 371 372 static void 373 svc_vc_destroy(SVCXPRT *xprt) 374 { 375 assert(xprt != NULL); 376 377 xprt_unregister(xprt); 378 __svc_vc_dodestroy(xprt); 379 } 380 381 static void 382 __svc_vc_dodestroy(SVCXPRT *xprt) 383 { 384 struct cf_conn *cd; 385 struct cf_rendezvous *r; 386 387 cd = (struct cf_conn *)xprt->xp_p1; 388 389 if (xprt->xp_fd != RPC_ANYFD) 390 (void)_close(xprt->xp_fd); 391 if (xprt->xp_port != 0) { 392 /* a rendezvouser socket */ 393 r = (struct cf_rendezvous *)xprt->xp_p1; 394 mem_free(r, sizeof (struct cf_rendezvous)); 395 xprt->xp_port = 0; 396 } else { 397 /* an actual connection socket */ 398 XDR_DESTROY(&(cd->xdrs)); 399 mem_free(cd, sizeof(struct cf_conn)); 400 } 401 if (xprt->xp_rtaddr.buf) 402 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 403 if (xprt->xp_ltaddr.buf) 404 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 405 free(xprt->xp_tp); 406 free(xprt->xp_netid); 407 svc_xprt_free(xprt); 408 } 409 410 /*ARGSUSED*/ 411 static bool_t 412 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 413 { 414 return (FALSE); 415 } 416 417 static bool_t 418 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 419 { 420 struct cf_rendezvous *cfp; 421 422 cfp = (struct cf_rendezvous *)xprt->xp_p1; 423 if (cfp == NULL) 424 return (FALSE); 425 switch (rq) { 426 case SVCGET_CONNMAXREC: 427 *(int *)in = cfp->maxrec; 428 break; 429 case SVCSET_CONNMAXREC: 430 cfp->maxrec = *(int *)in; 431 break; 432 default: 433 return (FALSE); 434 } 435 return (TRUE); 436 } 437 438 /* 439 * reads data from the tcp or uip connection. 440 * any error is fatal and the connection is closed. 441 * (And a read of zero bytes is a half closed stream => error.) 442 * All read operations timeout after 35 seconds. A timeout is 443 * fatal for the connection. 444 */ 445 static int 446 read_vc(void *xprtp, void *buf, int len) 447 { 448 SVCXPRT *xprt; 449 int sock; 450 int milliseconds = 35 * 1000; 451 struct pollfd pollfd; 452 struct cf_conn *cfp; 453 454 xprt = (SVCXPRT *)xprtp; 455 assert(xprt != NULL); 456 457 sock = xprt->xp_fd; 458 459 cfp = (struct cf_conn *)xprt->xp_p1; 460 461 if (cfp->nonblock) { 462 len = _read(sock, buf, (size_t)len); 463 if (len < 0) { 464 if (errno == EAGAIN) 465 len = 0; 466 else 467 goto fatal_err; 468 } 469 if (len != 0) 470 gettimeofday(&cfp->last_recv_time, NULL); 471 return len; 472 } 473 474 do { 475 pollfd.fd = sock; 476 pollfd.events = POLLIN; 477 pollfd.revents = 0; 478 switch (_poll(&pollfd, 1, milliseconds)) { 479 case -1: 480 if (errno == EINTR) 481 continue; 482 /*FALLTHROUGH*/ 483 case 0: 484 goto fatal_err; 485 486 default: 487 break; 488 } 489 } while ((pollfd.revents & POLLIN) == 0); 490 491 if ((len = _read(sock, buf, (size_t)len)) > 0) { 492 gettimeofday(&cfp->last_recv_time, NULL); 493 return (len); 494 } 495 496 fatal_err: 497 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 498 return (-1); 499 } 500 501 /* 502 * writes data to the tcp connection. 503 * Any error is fatal and the connection is closed. 504 */ 505 static int 506 write_vc(void *xprtp, void *buf, int len) 507 { 508 SVCXPRT *xprt; 509 int i, cnt; 510 struct cf_conn *cd; 511 struct timeval tv0, tv1; 512 513 xprt = (SVCXPRT *)xprtp; 514 assert(xprt != NULL); 515 516 cd = (struct cf_conn *)xprt->xp_p1; 517 518 if (cd->nonblock) 519 gettimeofday(&tv0, NULL); 520 521 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 522 i = _write(xprt->xp_fd, buf, (size_t)cnt); 523 if (i < 0) { 524 if (errno != EAGAIN || !cd->nonblock) { 525 cd->strm_stat = XPRT_DIED; 526 return (-1); 527 } 528 if (cd->nonblock) { 529 /* 530 * For non-blocking connections, do not 531 * take more than 2 seconds writing the 532 * data out. 533 * 534 * XXX 2 is an arbitrary amount. 535 */ 536 gettimeofday(&tv1, NULL); 537 if (tv1.tv_sec - tv0.tv_sec >= 2) { 538 cd->strm_stat = XPRT_DIED; 539 return (-1); 540 } 541 } 542 i = 0; 543 } 544 } 545 546 return (len); 547 } 548 549 static enum xprt_stat 550 svc_vc_stat(SVCXPRT *xprt) 551 { 552 struct cf_conn *cd; 553 554 assert(xprt != NULL); 555 556 cd = (struct cf_conn *)(xprt->xp_p1); 557 558 if (cd->strm_stat == XPRT_DIED) 559 return (XPRT_DIED); 560 if (! xdrrec_eof(&(cd->xdrs))) 561 return (XPRT_MOREREQS); 562 return (XPRT_IDLE); 563 } 564 565 static bool_t 566 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 567 { 568 struct cf_conn *cd; 569 XDR *xdrs; 570 571 assert(xprt != NULL); 572 assert(msg != NULL); 573 574 cd = (struct cf_conn *)(xprt->xp_p1); 575 xdrs = &(cd->xdrs); 576 577 if (cd->nonblock) { 578 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 579 return FALSE; 580 } else { 581 (void)xdrrec_skiprecord(xdrs); 582 } 583 584 xdrs->x_op = XDR_DECODE; 585 if (xdr_callmsg(xdrs, msg)) { 586 cd->x_id = msg->rm_xid; 587 return (TRUE); 588 } 589 cd->strm_stat = XPRT_DIED; 590 return (FALSE); 591 } 592 593 static bool_t 594 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 595 { 596 struct cf_conn *cd; 597 598 assert(xprt != NULL); 599 cd = (struct cf_conn *)(xprt->xp_p1); 600 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt), 601 &cd->xdrs, xdr_args, args_ptr)); 602 } 603 604 static bool_t 605 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 606 { 607 XDR *xdrs; 608 609 assert(xprt != NULL); 610 /* args_ptr may be NULL */ 611 612 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 613 614 xdrs->x_op = XDR_FREE; 615 return ((*xdr_args)(xdrs, args_ptr)); 616 } 617 618 static bool_t 619 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 620 { 621 struct cf_conn *cd; 622 XDR *xdrs; 623 bool_t rstat; 624 xdrproc_t xdr_proc; 625 caddr_t xdr_where; 626 u_int pos; 627 628 assert(xprt != NULL); 629 assert(msg != NULL); 630 631 cd = (struct cf_conn *)(xprt->xp_p1); 632 xdrs = &(cd->xdrs); 633 634 xdrs->x_op = XDR_ENCODE; 635 msg->rm_xid = cd->x_id; 636 rstat = TRUE; 637 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 638 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 639 xdr_proc = msg->acpted_rply.ar_results.proc; 640 xdr_where = msg->acpted_rply.ar_results.where; 641 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 642 msg->acpted_rply.ar_results.where = NULL; 643 644 pos = XDR_GETPOS(xdrs); 645 if (!xdr_replymsg(xdrs, msg) || 646 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) { 647 XDR_SETPOS(xdrs, pos); 648 rstat = FALSE; 649 } 650 } else { 651 rstat = xdr_replymsg(xdrs, msg); 652 } 653 654 if (rstat) 655 (void)xdrrec_endofrecord(xdrs, TRUE); 656 657 return (rstat); 658 } 659 660 static void 661 svc_vc_ops(SVCXPRT *xprt) 662 { 663 static struct xp_ops ops; 664 static struct xp_ops2 ops2; 665 666 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 667 668 mutex_lock(&ops_lock); 669 if (ops.xp_recv == NULL) { 670 ops.xp_recv = svc_vc_recv; 671 ops.xp_stat = svc_vc_stat; 672 ops.xp_getargs = svc_vc_getargs; 673 ops.xp_reply = svc_vc_reply; 674 ops.xp_freeargs = svc_vc_freeargs; 675 ops.xp_destroy = svc_vc_destroy; 676 ops2.xp_control = svc_vc_control; 677 } 678 xprt->xp_ops = &ops; 679 xprt->xp_ops2 = &ops2; 680 mutex_unlock(&ops_lock); 681 } 682 683 static void 684 svc_vc_rendezvous_ops(SVCXPRT *xprt) 685 { 686 static struct xp_ops ops; 687 static struct xp_ops2 ops2; 688 689 mutex_lock(&ops_lock); 690 if (ops.xp_recv == NULL) { 691 ops.xp_recv = rendezvous_request; 692 ops.xp_stat = rendezvous_stat; 693 ops.xp_getargs = 694 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 695 ops.xp_reply = 696 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 697 ops.xp_freeargs = 698 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 699 ops.xp_destroy = svc_vc_destroy; 700 ops2.xp_control = svc_vc_rendezvous_control; 701 } 702 xprt->xp_ops = &ops; 703 xprt->xp_ops2 = &ops2; 704 mutex_unlock(&ops_lock); 705 } 706 707 /* 708 * Get the effective UID of the sending process. Used by rpcbind, keyserv 709 * and rpc.yppasswdd on AF_LOCAL. 710 */ 711 int 712 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 713 int sock, ret; 714 gid_t egid; 715 uid_t euid; 716 struct sockaddr *sa; 717 718 sock = transp->xp_fd; 719 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 720 if (sa->sa_family == AF_LOCAL) { 721 ret = getpeereid(sock, &euid, &egid); 722 if (ret == 0) 723 *uid = euid; 724 return (ret); 725 } else 726 return (-1); 727 } 728 729 /* 730 * Destroy xprts that have not have had any activity in 'timeout' seconds. 731 * If 'cleanblock' is true, blocking connections (the default) are also 732 * cleaned. If timeout is 0, the least active connection is picked. 733 */ 734 bool_t 735 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 736 { 737 int i, ncleaned; 738 SVCXPRT *xprt, *least_active; 739 struct timeval tv, tdiff, tmax; 740 struct cf_conn *cd; 741 742 gettimeofday(&tv, NULL); 743 tmax.tv_sec = tmax.tv_usec = 0; 744 least_active = NULL; 745 rwlock_wrlock(&svc_fd_lock); 746 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 747 if (FD_ISSET(i, fds)) { 748 xprt = __svc_xports[i]; 749 if (xprt == NULL || xprt->xp_ops == NULL || 750 xprt->xp_ops->xp_recv != svc_vc_recv) 751 continue; 752 cd = (struct cf_conn *)xprt->xp_p1; 753 if (!cleanblock && !cd->nonblock) 754 continue; 755 if (timeout == 0) { 756 timersub(&tv, &cd->last_recv_time, &tdiff); 757 if (timercmp(&tdiff, &tmax, >)) { 758 tmax = tdiff; 759 least_active = xprt; 760 } 761 continue; 762 } 763 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 764 __xprt_unregister_unlocked(xprt); 765 __svc_vc_dodestroy(xprt); 766 ncleaned++; 767 } 768 } 769 } 770 if (timeout == 0 && least_active != NULL) { 771 __xprt_unregister_unlocked(least_active); 772 __svc_vc_dodestroy(least_active); 773 ncleaned++; 774 } 775 rwlock_unlock(&svc_fd_lock); 776 return ncleaned > 0 ? TRUE : FALSE; 777 } 778