1/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */ 2 3/*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#if defined(LIBC_SCCS) && !defined(lint) 32static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 33static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 34#endif 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: stable/10/lib/libc/rpc/svc_vc.c 309492 2016-12-03 18:08:49Z ngie $"); 37 38/* 39 * svc_vc.c, Server side for Connection Oriented based RPC. 40 * 41 * Actually implements two flavors of transporter - 42 * a tcp rendezvouser (a listner and connection establisher) 43 * and a record/tcp stream. 44 */ 45 46#include "namespace.h" 47#include "reentrant.h" 48#include <sys/types.h> 49#include <sys/param.h> 50#include <sys/poll.h> 51#include <sys/socket.h> 52#include <sys/un.h> 53#include <sys/time.h> 54#include <sys/uio.h> 55#include <netinet/in.h> 56#include <netinet/tcp.h> 57 58#include <assert.h> 59#include <err.h> 60#include <errno.h> 61#include <fcntl.h> 62#include <stdio.h> 63#include <stdlib.h> 64#include <string.h> 65#include <unistd.h> 66 67#include <rpc/rpc.h> 68 69#include "rpc_com.h" 70#include "mt_misc.h" 71#include "un-namespace.h" 72 73static SVCXPRT *makefd_xprt(int, u_int, u_int); 74static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 75static enum xprt_stat rendezvous_stat(SVCXPRT *); 76static void svc_vc_destroy(SVCXPRT *); 77static void __svc_vc_dodestroy (SVCXPRT *); 78static int read_vc(void *, void *, int); 79static int write_vc(void *, void *, int); 80static enum xprt_stat svc_vc_stat(SVCXPRT *); 81static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 82static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 83static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 84static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 85static void svc_vc_rendezvous_ops(SVCXPRT *); 86static void svc_vc_ops(SVCXPRT *); 87static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 88static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 89 void *in); 90 91struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 92 u_int sendsize; 93 u_int recvsize; 94 int maxrec; 95}; 96 97struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 98 enum xprt_stat strm_stat; 99 u_int32_t x_id; 100 XDR xdrs; 101 char verf_body[MAX_AUTH_BYTES]; 102 u_int sendsize; 103 u_int recvsize; 104 int maxrec; 105 bool_t nonblock; 106 struct timeval last_recv_time; 107}; 108 109/* 110 * Usage: 111 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 112 * 113 * Creates, registers, and returns a (rpc) tcp based transporter. 114 * Once *xprt is initialized, it is registered as a transporter 115 * see (svc.h, xprt_register). This routine returns 116 * a NULL if a problem occurred. 117 * 118 * The filedescriptor passed in is expected to refer to a bound, but 119 * not yet connected socket. 120 * 121 * Since streams do buffered io similar to stdio, the caller can specify 122 * how big the send and receive buffers are via the second and third parms; 123 * 0 => use the system default. 124 */ 125SVCXPRT * 126svc_vc_create(int fd, u_int sendsize, u_int recvsize) 127{ 128 SVCXPRT *xprt = NULL; 129 struct cf_rendezvous *r = NULL; 130 struct __rpc_sockinfo si; 131 struct sockaddr_storage sslocal; 132 socklen_t slen; 133 134 if (!__rpc_fd2sockinfo(fd, &si)) 135 return NULL; 136 137 r = mem_alloc(sizeof(*r)); 138 if (r == NULL) { 139 warnx("svc_vc_create: out of memory"); 140 goto cleanup_svc_vc_create; 141 } 142 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 143 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 144 r->maxrec = __svc_maxrec; 145 xprt = svc_xprt_alloc(); 146 if (xprt == NULL) { 147 warnx("svc_vc_create: out of memory"); 148 goto cleanup_svc_vc_create; 149 } 150 xprt->xp_p1 = r; 151 xprt->xp_verf = _null_auth; 152 svc_vc_rendezvous_ops(xprt); 153 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 154 xprt->xp_fd = fd; 155 156 slen = sizeof (struct sockaddr_storage); 157 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 158 warnx("svc_vc_create: could not retrieve local addr"); 159 goto cleanup_svc_vc_create; 160 } 161 162 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 163 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 164 if (xprt->xp_ltaddr.buf == NULL) { 165 warnx("svc_vc_create: no mem for local addr"); 166 goto cleanup_svc_vc_create; 167 } 168 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 169 170 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 171 xprt_register(xprt); 172 return (xprt); 173cleanup_svc_vc_create: 174 if (xprt) 175 mem_free(xprt, sizeof(*xprt)); 176 if (r != NULL) 177 mem_free(r, sizeof(*r)); 178 return (NULL); 179} 180 181/* 182 * Like svtcp_create(), except the routine takes any *open* UNIX file 183 * descriptor as its first input. 184 */ 185SVCXPRT * 186svc_fd_create(int fd, u_int sendsize, u_int recvsize) 187{ 188 struct sockaddr_storage ss; 189 socklen_t slen; 190 SVCXPRT *ret; 191 192 assert(fd != -1); 193 194 ret = makefd_xprt(fd, sendsize, recvsize); 195 if (ret == NULL) 196 return NULL; 197 198 slen = sizeof (struct sockaddr_storage); 199 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 200 warnx("svc_fd_create: could not retrieve local addr"); 201 goto freedata; 202 } 203 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 204 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 205 if (ret->xp_ltaddr.buf == NULL) { 206 warnx("svc_fd_create: no mem for local addr"); 207 goto freedata; 208 } 209 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 210 211 slen = sizeof (struct sockaddr_storage); 212 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 213 warnx("svc_fd_create: could not retrieve remote addr"); 214 goto freedata; 215 } 216 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 217 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 218 if (ret->xp_rtaddr.buf == NULL) { 219 warnx("svc_fd_create: no mem for local addr"); 220 goto freedata; 221 } 222 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 223#ifdef PORTMAP 224 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 225 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 226 ret->xp_addrlen = sizeof (struct sockaddr_in); 227 } 228#endif /* PORTMAP */ 229 230 return ret; 231 232freedata: 233 if (ret->xp_ltaddr.buf != NULL) 234 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 235 236 return NULL; 237} 238 239static SVCXPRT * 240makefd_xprt(int fd, u_int sendsize, u_int recvsize) 241{ 242 SVCXPRT *xprt; 243 struct cf_conn *cd; 244 const char *netid; 245 struct __rpc_sockinfo si; 246 247 assert(fd != -1); 248 249 xprt = svc_xprt_alloc(); 250 if (xprt == NULL) { 251 warnx("svc_vc: makefd_xprt: out of memory"); 252 goto done; 253 } 254 cd = mem_alloc(sizeof(struct cf_conn)); 255 if (cd == NULL) { 256 warnx("svc_tcp: makefd_xprt: out of memory"); 257 svc_xprt_free(xprt); 258 xprt = NULL; 259 goto done; 260 } 261 cd->strm_stat = XPRT_IDLE; 262 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 263 xprt, read_vc, write_vc); 264 xprt->xp_p1 = cd; 265 xprt->xp_verf.oa_base = cd->verf_body; 266 svc_vc_ops(xprt); /* truely deals with calls */ 267 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 268 xprt->xp_fd = fd; 269 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 270 xprt->xp_netid = strdup(netid); 271 272 xprt_register(xprt); 273done: 274 return (xprt); 275} 276 277/*ARGSUSED*/ 278static bool_t 279rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg) 280{ 281 int sock, flags; 282 struct cf_rendezvous *r; 283 struct cf_conn *cd; 284 struct sockaddr_storage addr, sslocal; 285 socklen_t len, slen; 286 struct __rpc_sockinfo si; 287 SVCXPRT *newxprt; 288 fd_set cleanfds; 289 290 assert(xprt != NULL); 291 assert(msg != NULL); 292 293 r = (struct cf_rendezvous *)xprt->xp_p1; 294again: 295 len = sizeof addr; 296 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 297 &len)) < 0) { 298 if (errno == EINTR) 299 goto again; 300 /* 301 * Clean out the most idle file descriptor when we're 302 * running out. 303 */ 304 if (errno == EMFILE || errno == ENFILE) { 305 cleanfds = svc_fdset; 306 __svc_clean_idle(&cleanfds, 0, FALSE); 307 goto again; 308 } 309 return (FALSE); 310 } 311 /* 312 * make a new transporter (re-uses xprt) 313 */ 314 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 315 newxprt->xp_rtaddr.buf = mem_alloc(len); 316 if (newxprt->xp_rtaddr.buf == NULL) 317 return (FALSE); 318 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 319 newxprt->xp_rtaddr.len = len; 320#ifdef PORTMAP 321 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) { 322 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 323 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 324 } 325#endif /* PORTMAP */ 326 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 327 len = 1; 328 /* XXX fvdl - is this useful? */ 329 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 330 } 331 332 cd = (struct cf_conn *)newxprt->xp_p1; 333 334 cd->recvsize = r->recvsize; 335 cd->sendsize = r->sendsize; 336 cd->maxrec = r->maxrec; 337 338 if (cd->maxrec != 0) { 339 flags = _fcntl(sock, F_GETFL, 0); 340 if (flags == -1) 341 return (FALSE); 342 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 343 return (FALSE); 344 if (cd->recvsize > cd->maxrec) 345 cd->recvsize = cd->maxrec; 346 cd->nonblock = TRUE; 347 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 348 } else 349 cd->nonblock = FALSE; 350 slen = sizeof(struct sockaddr_storage); 351 if(_getsockname(sock, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 352 warnx("svc_vc_create: could not retrieve local addr"); 353 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0; 354 } else { 355 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = sslocal.ss_len; 356 newxprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 357 if (newxprt->xp_ltaddr.buf == NULL) { 358 warnx("svc_vc_create: no mem for local addr"); 359 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0; 360 } else { 361 memcpy(newxprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 362 } 363 } 364 365 gettimeofday(&cd->last_recv_time, NULL); 366 367 return (FALSE); /* there is never an rpc msg to be processed */ 368} 369 370/*ARGSUSED*/ 371static enum xprt_stat 372rendezvous_stat(SVCXPRT *xprt) 373{ 374 375 return (XPRT_IDLE); 376} 377 378static void 379svc_vc_destroy(SVCXPRT *xprt) 380{ 381 assert(xprt != NULL); 382 383 xprt_unregister(xprt); 384 __svc_vc_dodestroy(xprt); 385} 386 387static void 388__svc_vc_dodestroy(SVCXPRT *xprt) 389{ 390 struct cf_conn *cd; 391 struct cf_rendezvous *r; 392 393 cd = (struct cf_conn *)xprt->xp_p1; 394 395 if (xprt->xp_fd != RPC_ANYFD) 396 (void)_close(xprt->xp_fd); 397 if (xprt->xp_port != 0) { 398 /* a rendezvouser socket */ 399 r = (struct cf_rendezvous *)xprt->xp_p1; 400 mem_free(r, sizeof (struct cf_rendezvous)); 401 xprt->xp_port = 0; 402 } else { 403 /* an actual connection socket */ 404 XDR_DESTROY(&(cd->xdrs)); 405 mem_free(cd, sizeof(struct cf_conn)); 406 } 407 if (xprt->xp_rtaddr.buf) 408 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 409 if (xprt->xp_ltaddr.buf) 410 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 411 free(xprt->xp_tp); 412 free(xprt->xp_netid); 413 svc_xprt_free(xprt); 414} 415 416/*ARGSUSED*/ 417static bool_t 418svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 419{ 420 return (FALSE); 421} 422 423static bool_t 424svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 425{ 426 struct cf_rendezvous *cfp; 427 428 cfp = (struct cf_rendezvous *)xprt->xp_p1; 429 if (cfp == NULL) 430 return (FALSE); 431 switch (rq) { 432 case SVCGET_CONNMAXREC: 433 *(int *)in = cfp->maxrec; 434 break; 435 case SVCSET_CONNMAXREC: 436 cfp->maxrec = *(int *)in; 437 break; 438 default: 439 return (FALSE); 440 } 441 return (TRUE); 442} 443 444/* 445 * reads data from the tcp or uip connection. 446 * any error is fatal and the connection is closed. 447 * (And a read of zero bytes is a half closed stream => error.) 448 * All read operations timeout after 35 seconds. A timeout is 449 * fatal for the connection. 450 */ 451static int 452read_vc(void *xprtp, void *buf, int len) 453{ 454 SVCXPRT *xprt; 455 int sock; 456 int milliseconds = 35 * 1000; 457 struct pollfd pollfd; 458 struct cf_conn *cfp; 459 460 xprt = (SVCXPRT *)xprtp; 461 assert(xprt != NULL); 462 463 sock = xprt->xp_fd; 464 465 cfp = (struct cf_conn *)xprt->xp_p1; 466 467 if (cfp->nonblock) { 468 len = _read(sock, buf, (size_t)len); 469 if (len < 0) { 470 if (errno == EAGAIN) 471 len = 0; 472 else 473 goto fatal_err; 474 } 475 if (len != 0) 476 gettimeofday(&cfp->last_recv_time, NULL); 477 return len; 478 } 479 480 do { 481 pollfd.fd = sock; 482 pollfd.events = POLLIN; 483 pollfd.revents = 0; 484 switch (_poll(&pollfd, 1, milliseconds)) { 485 case -1: 486 if (errno == EINTR) 487 continue; 488 /*FALLTHROUGH*/ 489 case 0: 490 goto fatal_err; 491 492 default: 493 break; 494 } 495 } while ((pollfd.revents & POLLIN) == 0); 496 497 if ((len = _read(sock, buf, (size_t)len)) > 0) { 498 gettimeofday(&cfp->last_recv_time, NULL); 499 return (len); 500 } 501 502fatal_err: 503 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 504 return (-1); 505} 506 507/* 508 * writes data to the tcp connection. 509 * Any error is fatal and the connection is closed. 510 */ 511static int 512write_vc(void *xprtp, void *buf, int len) 513{ 514 SVCXPRT *xprt; 515 int i, cnt; 516 struct cf_conn *cd; 517 struct timeval tv0, tv1; 518 519 xprt = (SVCXPRT *)xprtp; 520 assert(xprt != NULL); 521 522 cd = (struct cf_conn *)xprt->xp_p1; 523 524 if (cd->nonblock) 525 gettimeofday(&tv0, NULL); 526 527 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 528 i = _write(xprt->xp_fd, buf, (size_t)cnt); 529 if (i < 0) { 530 if (errno != EAGAIN || !cd->nonblock) { 531 cd->strm_stat = XPRT_DIED; 532 return (-1); 533 } 534 if (cd->nonblock) { 535 /* 536 * For non-blocking connections, do not 537 * take more than 2 seconds writing the 538 * data out. 539 * 540 * XXX 2 is an arbitrary amount. 541 */ 542 gettimeofday(&tv1, NULL); 543 if (tv1.tv_sec - tv0.tv_sec >= 2) { 544 cd->strm_stat = XPRT_DIED; 545 return (-1); 546 } 547 } 548 i = 0; 549 } 550 } 551 552 return (len); 553} 554 555static enum xprt_stat 556svc_vc_stat(SVCXPRT *xprt) 557{ 558 struct cf_conn *cd; 559 560 assert(xprt != NULL); 561 562 cd = (struct cf_conn *)(xprt->xp_p1); 563 564 if (cd->strm_stat == XPRT_DIED) 565 return (XPRT_DIED); 566 if (! xdrrec_eof(&(cd->xdrs))) 567 return (XPRT_MOREREQS); 568 return (XPRT_IDLE); 569} 570 571static bool_t 572svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 573{ 574 struct cf_conn *cd; 575 XDR *xdrs; 576 577 assert(xprt != NULL); 578 assert(msg != NULL); 579 580 cd = (struct cf_conn *)(xprt->xp_p1); 581 xdrs = &(cd->xdrs); 582 583 if (cd->nonblock) { 584 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 585 return FALSE; 586 } else { 587 (void)xdrrec_skiprecord(xdrs); 588 } 589 590 xdrs->x_op = XDR_DECODE; 591 if (xdr_callmsg(xdrs, msg)) { 592 cd->x_id = msg->rm_xid; 593 return (TRUE); 594 } 595 cd->strm_stat = XPRT_DIED; 596 return (FALSE); 597} 598 599static bool_t 600svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 601{ 602 struct cf_conn *cd; 603 604 assert(xprt != NULL); 605 cd = (struct cf_conn *)(xprt->xp_p1); 606 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt), 607 &cd->xdrs, xdr_args, args_ptr)); 608} 609 610static bool_t 611svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 612{ 613 XDR *xdrs; 614 615 assert(xprt != NULL); 616 /* args_ptr may be NULL */ 617 618 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 619 620 xdrs->x_op = XDR_FREE; 621 return ((*xdr_args)(xdrs, args_ptr)); 622} 623 624static bool_t 625svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 626{ 627 struct cf_conn *cd; 628 XDR *xdrs; 629 bool_t rstat; 630 xdrproc_t xdr_proc; 631 caddr_t xdr_where; 632 u_int pos; 633 634 assert(xprt != NULL); 635 assert(msg != NULL); 636 637 cd = (struct cf_conn *)(xprt->xp_p1); 638 xdrs = &(cd->xdrs); 639 640 xdrs->x_op = XDR_ENCODE; 641 msg->rm_xid = cd->x_id; 642 rstat = TRUE; 643 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 644 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 645 xdr_proc = msg->acpted_rply.ar_results.proc; 646 xdr_where = msg->acpted_rply.ar_results.where; 647 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 648 msg->acpted_rply.ar_results.where = NULL; 649 650 pos = XDR_GETPOS(xdrs); 651 if (!xdr_replymsg(xdrs, msg) || 652 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) { 653 XDR_SETPOS(xdrs, pos); 654 rstat = FALSE; 655 } 656 } else { 657 rstat = xdr_replymsg(xdrs, msg); 658 } 659 660 if (rstat) 661 (void)xdrrec_endofrecord(xdrs, TRUE); 662 663 return (rstat); 664} 665 666static void 667svc_vc_ops(SVCXPRT *xprt) 668{ 669 static struct xp_ops ops; 670 static struct xp_ops2 ops2; 671 672/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 673 674 mutex_lock(&ops_lock); 675 if (ops.xp_recv == NULL) { 676 ops.xp_recv = svc_vc_recv; 677 ops.xp_stat = svc_vc_stat; 678 ops.xp_getargs = svc_vc_getargs; 679 ops.xp_reply = svc_vc_reply; 680 ops.xp_freeargs = svc_vc_freeargs; 681 ops.xp_destroy = svc_vc_destroy; 682 ops2.xp_control = svc_vc_control; 683 } 684 xprt->xp_ops = &ops; 685 xprt->xp_ops2 = &ops2; 686 mutex_unlock(&ops_lock); 687} 688 689static void 690svc_vc_rendezvous_ops(SVCXPRT *xprt) 691{ 692 static struct xp_ops ops; 693 static struct xp_ops2 ops2; 694 695 mutex_lock(&ops_lock); 696 if (ops.xp_recv == NULL) { 697 ops.xp_recv = rendezvous_request; 698 ops.xp_stat = rendezvous_stat; 699 ops.xp_getargs = 700 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 701 ops.xp_reply = 702 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 703 ops.xp_freeargs = 704 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 705 ops.xp_destroy = svc_vc_destroy; 706 ops2.xp_control = svc_vc_rendezvous_control; 707 } 708 xprt->xp_ops = &ops; 709 xprt->xp_ops2 = &ops2; 710 mutex_unlock(&ops_lock); 711} 712 713/* 714 * Get the effective UID of the sending process. Used by rpcbind, keyserv 715 * and rpc.yppasswdd on AF_LOCAL. 716 */ 717int 718__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 719 int sock, ret; 720 gid_t egid; 721 uid_t euid; 722 struct sockaddr *sa; 723 724 sock = transp->xp_fd; 725 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 726 if (sa->sa_family == AF_LOCAL) { 727 ret = getpeereid(sock, &euid, &egid); 728 if (ret == 0) 729 *uid = euid; 730 return (ret); 731 } else 732 return (-1); 733} 734 735/* 736 * Destroy xprts that have not have had any activity in 'timeout' seconds. 737 * If 'cleanblock' is true, blocking connections (the default) are also 738 * cleaned. If timeout is 0, the least active connection is picked. 739 */ 740bool_t 741__svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 742{ 743 int i, ncleaned; 744 SVCXPRT *xprt, *least_active; 745 struct timeval tv, tdiff, tmax; 746 struct cf_conn *cd; 747 748 gettimeofday(&tv, NULL); 749 tmax.tv_sec = tmax.tv_usec = 0; 750 least_active = NULL; 751 rwlock_wrlock(&svc_fd_lock); 752 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 753 if (FD_ISSET(i, fds)) { 754 xprt = __svc_xports[i]; 755 if (xprt == NULL || xprt->xp_ops == NULL || 756 xprt->xp_ops->xp_recv != svc_vc_recv) 757 continue; 758 cd = (struct cf_conn *)xprt->xp_p1; 759 if (!cleanblock && !cd->nonblock) 760 continue; 761 if (timeout == 0) { 762 timersub(&tv, &cd->last_recv_time, &tdiff); 763 if (timercmp(&tdiff, &tmax, >)) { 764 tmax = tdiff; 765 least_active = xprt; 766 } 767 continue; 768 } 769 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 770 __xprt_unregister_unlocked(xprt); 771 __svc_vc_dodestroy(xprt); 772 ncleaned++; 773 } 774 } 775 } 776 if (timeout == 0 && least_active != NULL) { 777 __xprt_unregister_unlocked(least_active); 778 __svc_vc_dodestroy(least_active); 779 ncleaned++; 780 } 781 rwlock_unlock(&svc_fd_lock); 782 return ncleaned > 0 ? TRUE : FALSE; 783} 784