svc_vc.c revision 330897
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#if defined(LIBC_SCCS) && !defined(lint) 34static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 35static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 36#endif 37#include <sys/cdefs.h> 38__FBSDID("$FreeBSD: stable/11/lib/libc/rpc/svc_vc.c 330897 2018-03-14 03:19:51Z eadler $"); 39 40/* 41 * svc_vc.c, Server side for Connection Oriented based RPC. 42 * 43 * Actually implements two flavors of transporter - 44 * a tcp rendezvouser (a listner and connection establisher) 45 * and a record/tcp stream. 46 */ 47 48#include "namespace.h" 49#include "reentrant.h" 50#include <sys/param.h> 51#include <sys/poll.h> 52#include <sys/socket.h> 53#include <sys/un.h> 54#include <sys/time.h> 55#include <sys/uio.h> 56#include <netinet/in.h> 57#include <netinet/tcp.h> 58 59#include <assert.h> 60#include <err.h> 61#include <errno.h> 62#include <fcntl.h> 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include <unistd.h> 67 68#include <rpc/rpc.h> 69 70#include "rpc_com.h" 71#include "mt_misc.h" 72#include "un-namespace.h" 73 74static SVCXPRT *makefd_xprt(int, u_int, u_int); 75static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 76static enum xprt_stat rendezvous_stat(SVCXPRT *); 77static void svc_vc_destroy(SVCXPRT *); 78static void __svc_vc_dodestroy (SVCXPRT *); 79static int read_vc(void *, void *, int); 80static int write_vc(void *, void *, int); 81static enum xprt_stat svc_vc_stat(SVCXPRT *); 82static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 83static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 84static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 85static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 86static void svc_vc_rendezvous_ops(SVCXPRT *); 87static void svc_vc_ops(SVCXPRT *); 88static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 89static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 90 void *in); 91 92struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 93 u_int sendsize; 94 u_int recvsize; 95 int maxrec; 96}; 97 98struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 99 enum xprt_stat strm_stat; 100 u_int32_t x_id; 101 XDR xdrs; 102 char verf_body[MAX_AUTH_BYTES]; 103 u_int sendsize; 104 u_int recvsize; 105 int maxrec; 106 bool_t nonblock; 107 struct timeval last_recv_time; 108}; 109 110/* 111 * Usage: 112 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 113 * 114 * Creates, registers, and returns a (rpc) tcp based transporter. 115 * Once *xprt is initialized, it is registered as a transporter 116 * see (svc.h, xprt_register). This routine returns 117 * a NULL if a problem occurred. 118 * 119 * The filedescriptor passed in is expected to refer to a bound, but 120 * not yet connected socket. 121 * 122 * Since streams do buffered io similar to stdio, the caller can specify 123 * how big the send and receive buffers are via the second and third parms; 124 * 0 => use the system default. 125 */ 126SVCXPRT * 127svc_vc_create(int fd, u_int sendsize, u_int recvsize) 128{ 129 SVCXPRT *xprt = NULL; 130 struct cf_rendezvous *r = NULL; 131 struct __rpc_sockinfo si; 132 struct sockaddr_storage sslocal; 133 socklen_t slen; 134 135 if (!__rpc_fd2sockinfo(fd, &si)) 136 return NULL; 137 138 r = mem_alloc(sizeof(*r)); 139 if (r == NULL) { 140 warnx("svc_vc_create: out of memory"); 141 goto cleanup_svc_vc_create; 142 } 143 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 144 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 145 r->maxrec = __svc_maxrec; 146 xprt = svc_xprt_alloc(); 147 if (xprt == NULL) { 148 warnx("svc_vc_create: out of memory"); 149 goto cleanup_svc_vc_create; 150 } 151 xprt->xp_p1 = r; 152 xprt->xp_verf = _null_auth; 153 svc_vc_rendezvous_ops(xprt); 154 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 155 xprt->xp_fd = fd; 156 157 slen = sizeof (struct sockaddr_storage); 158 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 159 warnx("svc_vc_create: could not retrieve local addr"); 160 goto cleanup_svc_vc_create; 161 } 162 163 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 164 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 165 if (xprt->xp_ltaddr.buf == NULL) { 166 warnx("svc_vc_create: no mem for local addr"); 167 goto cleanup_svc_vc_create; 168 } 169 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 170 171 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 172 xprt_register(xprt); 173 return (xprt); 174cleanup_svc_vc_create: 175 if (xprt) 176 mem_free(xprt, sizeof(*xprt)); 177 if (r != NULL) 178 mem_free(r, sizeof(*r)); 179 return (NULL); 180} 181 182/* 183 * Like svtcp_create(), except the routine takes any *open* UNIX file 184 * descriptor as its first input. 185 */ 186SVCXPRT * 187svc_fd_create(int fd, u_int sendsize, u_int recvsize) 188{ 189 struct sockaddr_storage ss; 190 socklen_t slen; 191 SVCXPRT *ret; 192 193 assert(fd != -1); 194 195 ret = makefd_xprt(fd, sendsize, recvsize); 196 if (ret == NULL) 197 return NULL; 198 199 slen = sizeof (struct sockaddr_storage); 200 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 201 warnx("svc_fd_create: could not retrieve local addr"); 202 goto freedata; 203 } 204 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 205 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 206 if (ret->xp_ltaddr.buf == NULL) { 207 warnx("svc_fd_create: no mem for local addr"); 208 goto freedata; 209 } 210 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 211 212 slen = sizeof (struct sockaddr_storage); 213 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 214 warnx("svc_fd_create: could not retrieve remote addr"); 215 goto freedata; 216 } 217 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 218 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 219 if (ret->xp_rtaddr.buf == NULL) { 220 warnx("svc_fd_create: no mem for local addr"); 221 goto freedata; 222 } 223 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 224#ifdef PORTMAP 225 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 226 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 227 ret->xp_addrlen = sizeof (struct sockaddr_in); 228 } 229#endif /* PORTMAP */ 230 231 return ret; 232 233freedata: 234 if (ret->xp_ltaddr.buf != NULL) 235 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 236 237 return NULL; 238} 239 240static SVCXPRT * 241makefd_xprt(int fd, u_int sendsize, u_int recvsize) 242{ 243 SVCXPRT *xprt; 244 struct cf_conn *cd; 245 const char *netid; 246 struct __rpc_sockinfo si; 247 248 assert(fd != -1); 249 250 xprt = svc_xprt_alloc(); 251 if (xprt == NULL) { 252 warnx("svc_vc: makefd_xprt: out of memory"); 253 goto done; 254 } 255 cd = mem_alloc(sizeof(struct cf_conn)); 256 if (cd == NULL) { 257 warnx("svc_tcp: makefd_xprt: out of memory"); 258 svc_xprt_free(xprt); 259 xprt = NULL; 260 goto done; 261 } 262 cd->strm_stat = XPRT_IDLE; 263 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 264 xprt, read_vc, write_vc); 265 xprt->xp_p1 = cd; 266 xprt->xp_verf.oa_base = cd->verf_body; 267 svc_vc_ops(xprt); /* truly deals with calls */ 268 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 269 xprt->xp_fd = fd; 270 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 271 xprt->xp_netid = strdup(netid); 272 273 xprt_register(xprt); 274done: 275 return (xprt); 276} 277 278/*ARGSUSED*/ 279static bool_t 280rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg) 281{ 282 int sock, flags; 283 struct cf_rendezvous *r; 284 struct cf_conn *cd; 285 struct sockaddr_storage addr, sslocal; 286 socklen_t len, slen; 287 struct __rpc_sockinfo si; 288 SVCXPRT *newxprt; 289 fd_set cleanfds; 290 291 assert(xprt != NULL); 292 assert(msg != NULL); 293 294 r = (struct cf_rendezvous *)xprt->xp_p1; 295again: 296 len = sizeof addr; 297 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 298 &len)) < 0) { 299 if (errno == EINTR) 300 goto again; 301 /* 302 * Clean out the most idle file descriptor when we're 303 * running out. 304 */ 305 if (errno == EMFILE || errno == ENFILE) { 306 cleanfds = svc_fdset; 307 __svc_clean_idle(&cleanfds, 0, FALSE); 308 goto again; 309 } 310 return (FALSE); 311 } 312 /* 313 * make a new transporter (re-uses xprt) 314 */ 315 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 316 newxprt->xp_rtaddr.buf = mem_alloc(len); 317 if (newxprt->xp_rtaddr.buf == NULL) 318 return (FALSE); 319 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 320 newxprt->xp_rtaddr.len = len; 321#ifdef PORTMAP 322 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) { 323 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 324 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 325 } 326#endif /* PORTMAP */ 327 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 328 len = 1; 329 /* XXX fvdl - is this useful? */ 330 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 331 } 332 333 cd = (struct cf_conn *)newxprt->xp_p1; 334 335 cd->recvsize = r->recvsize; 336 cd->sendsize = r->sendsize; 337 cd->maxrec = r->maxrec; 338 339 if (cd->maxrec != 0) { 340 flags = _fcntl(sock, F_GETFL, 0); 341 if (flags == -1) 342 return (FALSE); 343 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 344 return (FALSE); 345 if (cd->recvsize > cd->maxrec) 346 cd->recvsize = cd->maxrec; 347 cd->nonblock = TRUE; 348 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 349 } else 350 cd->nonblock = FALSE; 351 slen = sizeof(struct sockaddr_storage); 352 if(_getsockname(sock, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 353 warnx("svc_vc_create: could not retrieve local addr"); 354 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0; 355 } else { 356 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = sslocal.ss_len; 357 newxprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 358 if (newxprt->xp_ltaddr.buf == NULL) { 359 warnx("svc_vc_create: no mem for local addr"); 360 newxprt->xp_ltaddr.maxlen = newxprt->xp_ltaddr.len = 0; 361 } else { 362 memcpy(newxprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 363 } 364 } 365 366 gettimeofday(&cd->last_recv_time, NULL); 367 368 return (FALSE); /* there is never an rpc msg to be processed */ 369} 370 371/*ARGSUSED*/ 372static enum xprt_stat 373rendezvous_stat(SVCXPRT *xprt) 374{ 375 376 return (XPRT_IDLE); 377} 378 379static void 380svc_vc_destroy(SVCXPRT *xprt) 381{ 382 assert(xprt != NULL); 383 384 xprt_unregister(xprt); 385 __svc_vc_dodestroy(xprt); 386} 387 388static void 389__svc_vc_dodestroy(SVCXPRT *xprt) 390{ 391 struct cf_conn *cd; 392 struct cf_rendezvous *r; 393 394 cd = (struct cf_conn *)xprt->xp_p1; 395 396 if (xprt->xp_fd != RPC_ANYFD) 397 (void)_close(xprt->xp_fd); 398 if (xprt->xp_port != 0) { 399 /* a rendezvouser socket */ 400 r = (struct cf_rendezvous *)xprt->xp_p1; 401 mem_free(r, sizeof (struct cf_rendezvous)); 402 xprt->xp_port = 0; 403 } else { 404 /* an actual connection socket */ 405 XDR_DESTROY(&(cd->xdrs)); 406 mem_free(cd, sizeof(struct cf_conn)); 407 } 408 if (xprt->xp_rtaddr.buf) 409 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 410 if (xprt->xp_ltaddr.buf) 411 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 412 free(xprt->xp_tp); 413 free(xprt->xp_netid); 414 svc_xprt_free(xprt); 415} 416 417/*ARGSUSED*/ 418static bool_t 419svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 420{ 421 return (FALSE); 422} 423 424static bool_t 425svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 426{ 427 struct cf_rendezvous *cfp; 428 429 cfp = (struct cf_rendezvous *)xprt->xp_p1; 430 if (cfp == NULL) 431 return (FALSE); 432 switch (rq) { 433 case SVCGET_CONNMAXREC: 434 *(int *)in = cfp->maxrec; 435 break; 436 case SVCSET_CONNMAXREC: 437 cfp->maxrec = *(int *)in; 438 break; 439 default: 440 return (FALSE); 441 } 442 return (TRUE); 443} 444 445/* 446 * reads data from the tcp or uip connection. 447 * any error is fatal and the connection is closed. 448 * (And a read of zero bytes is a half closed stream => error.) 449 * All read operations timeout after 35 seconds. A timeout is 450 * fatal for the connection. 451 */ 452static int 453read_vc(void *xprtp, void *buf, int len) 454{ 455 SVCXPRT *xprt; 456 int sock; 457 int milliseconds = 35 * 1000; 458 struct pollfd pollfd; 459 struct cf_conn *cfp; 460 461 xprt = (SVCXPRT *)xprtp; 462 assert(xprt != NULL); 463 464 sock = xprt->xp_fd; 465 466 cfp = (struct cf_conn *)xprt->xp_p1; 467 468 if (cfp->nonblock) { 469 len = _read(sock, buf, (size_t)len); 470 if (len < 0) { 471 if (errno == EAGAIN) 472 len = 0; 473 else 474 goto fatal_err; 475 } 476 if (len != 0) 477 gettimeofday(&cfp->last_recv_time, NULL); 478 return len; 479 } 480 481 do { 482 pollfd.fd = sock; 483 pollfd.events = POLLIN; 484 pollfd.revents = 0; 485 switch (_poll(&pollfd, 1, milliseconds)) { 486 case -1: 487 if (errno == EINTR) 488 continue; 489 /*FALLTHROUGH*/ 490 case 0: 491 goto fatal_err; 492 493 default: 494 break; 495 } 496 } while ((pollfd.revents & POLLIN) == 0); 497 498 if ((len = _read(sock, buf, (size_t)len)) > 0) { 499 gettimeofday(&cfp->last_recv_time, NULL); 500 return (len); 501 } 502 503fatal_err: 504 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 505 return (-1); 506} 507 508/* 509 * writes data to the tcp connection. 510 * Any error is fatal and the connection is closed. 511 */ 512static int 513write_vc(void *xprtp, void *buf, int len) 514{ 515 SVCXPRT *xprt; 516 int i, cnt; 517 struct cf_conn *cd; 518 struct timeval tv0, tv1; 519 520 xprt = (SVCXPRT *)xprtp; 521 assert(xprt != NULL); 522 523 cd = (struct cf_conn *)xprt->xp_p1; 524 525 if (cd->nonblock) 526 gettimeofday(&tv0, NULL); 527 528 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 529 i = _write(xprt->xp_fd, buf, (size_t)cnt); 530 if (i < 0) { 531 if (errno != EAGAIN || !cd->nonblock) { 532 cd->strm_stat = XPRT_DIED; 533 return (-1); 534 } 535 if (cd->nonblock) { 536 /* 537 * For non-blocking connections, do not 538 * take more than 2 seconds writing the 539 * data out. 540 * 541 * XXX 2 is an arbitrary amount. 542 */ 543 gettimeofday(&tv1, NULL); 544 if (tv1.tv_sec - tv0.tv_sec >= 2) { 545 cd->strm_stat = XPRT_DIED; 546 return (-1); 547 } 548 } 549 i = 0; 550 } 551 } 552 553 return (len); 554} 555 556static enum xprt_stat 557svc_vc_stat(SVCXPRT *xprt) 558{ 559 struct cf_conn *cd; 560 561 assert(xprt != NULL); 562 563 cd = (struct cf_conn *)(xprt->xp_p1); 564 565 if (cd->strm_stat == XPRT_DIED) 566 return (XPRT_DIED); 567 if (! xdrrec_eof(&(cd->xdrs))) 568 return (XPRT_MOREREQS); 569 return (XPRT_IDLE); 570} 571 572static bool_t 573svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 574{ 575 struct cf_conn *cd; 576 XDR *xdrs; 577 578 assert(xprt != NULL); 579 assert(msg != NULL); 580 581 cd = (struct cf_conn *)(xprt->xp_p1); 582 xdrs = &(cd->xdrs); 583 584 if (cd->nonblock) { 585 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 586 return FALSE; 587 } else { 588 (void)xdrrec_skiprecord(xdrs); 589 } 590 591 xdrs->x_op = XDR_DECODE; 592 if (xdr_callmsg(xdrs, msg)) { 593 cd->x_id = msg->rm_xid; 594 return (TRUE); 595 } 596 cd->strm_stat = XPRT_DIED; 597 return (FALSE); 598} 599 600static bool_t 601svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 602{ 603 struct cf_conn *cd; 604 605 assert(xprt != NULL); 606 cd = (struct cf_conn *)(xprt->xp_p1); 607 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt), 608 &cd->xdrs, xdr_args, args_ptr)); 609} 610 611static bool_t 612svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 613{ 614 XDR *xdrs; 615 616 assert(xprt != NULL); 617 /* args_ptr may be NULL */ 618 619 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 620 621 xdrs->x_op = XDR_FREE; 622 return ((*xdr_args)(xdrs, args_ptr)); 623} 624 625static bool_t 626svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 627{ 628 struct cf_conn *cd; 629 XDR *xdrs; 630 bool_t rstat; 631 xdrproc_t xdr_proc; 632 caddr_t xdr_where; 633 u_int pos; 634 635 assert(xprt != NULL); 636 assert(msg != NULL); 637 638 cd = (struct cf_conn *)(xprt->xp_p1); 639 xdrs = &(cd->xdrs); 640 641 xdrs->x_op = XDR_ENCODE; 642 msg->rm_xid = cd->x_id; 643 rstat = TRUE; 644 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 645 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 646 xdr_proc = msg->acpted_rply.ar_results.proc; 647 xdr_where = msg->acpted_rply.ar_results.where; 648 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 649 msg->acpted_rply.ar_results.where = NULL; 650 651 pos = XDR_GETPOS(xdrs); 652 if (!xdr_replymsg(xdrs, msg) || 653 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) { 654 XDR_SETPOS(xdrs, pos); 655 rstat = FALSE; 656 } 657 } else { 658 rstat = xdr_replymsg(xdrs, msg); 659 } 660 661 if (rstat) 662 (void)xdrrec_endofrecord(xdrs, TRUE); 663 664 return (rstat); 665} 666 667static void 668svc_vc_ops(SVCXPRT *xprt) 669{ 670 static struct xp_ops ops; 671 static struct xp_ops2 ops2; 672 673/* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 674 675 mutex_lock(&ops_lock); 676 if (ops.xp_recv == NULL) { 677 ops.xp_recv = svc_vc_recv; 678 ops.xp_stat = svc_vc_stat; 679 ops.xp_getargs = svc_vc_getargs; 680 ops.xp_reply = svc_vc_reply; 681 ops.xp_freeargs = svc_vc_freeargs; 682 ops.xp_destroy = svc_vc_destroy; 683 ops2.xp_control = svc_vc_control; 684 } 685 xprt->xp_ops = &ops; 686 xprt->xp_ops2 = &ops2; 687 mutex_unlock(&ops_lock); 688} 689 690static void 691svc_vc_rendezvous_ops(SVCXPRT *xprt) 692{ 693 static struct xp_ops ops; 694 static struct xp_ops2 ops2; 695 696 mutex_lock(&ops_lock); 697 if (ops.xp_recv == NULL) { 698 ops.xp_recv = rendezvous_request; 699 ops.xp_stat = rendezvous_stat; 700 ops.xp_getargs = 701 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 702 ops.xp_reply = 703 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 704 ops.xp_freeargs = 705 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 706 ops.xp_destroy = svc_vc_destroy; 707 ops2.xp_control = svc_vc_rendezvous_control; 708 } 709 xprt->xp_ops = &ops; 710 xprt->xp_ops2 = &ops2; 711 mutex_unlock(&ops_lock); 712} 713 714/* 715 * Get the effective UID of the sending process. Used by rpcbind, keyserv 716 * and rpc.yppasswdd on AF_LOCAL. 717 */ 718int 719__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 720 int sock, ret; 721 gid_t egid; 722 uid_t euid; 723 struct sockaddr *sa; 724 725 sock = transp->xp_fd; 726 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 727 if (sa->sa_family == AF_LOCAL) { 728 ret = getpeereid(sock, &euid, &egid); 729 if (ret == 0) 730 *uid = euid; 731 return (ret); 732 } else 733 return (-1); 734} 735 736/* 737 * Destroy xprts that have not have had any activity in 'timeout' seconds. 738 * If 'cleanblock' is true, blocking connections (the default) are also 739 * cleaned. If timeout is 0, the least active connection is picked. 740 */ 741bool_t 742__svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 743{ 744 int i, ncleaned; 745 SVCXPRT *xprt, *least_active; 746 struct timeval tv, tdiff, tmax; 747 struct cf_conn *cd; 748 749 gettimeofday(&tv, NULL); 750 tmax.tv_sec = tmax.tv_usec = 0; 751 least_active = NULL; 752 rwlock_wrlock(&svc_fd_lock); 753 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 754 if (FD_ISSET(i, fds)) { 755 xprt = __svc_xports[i]; 756 if (xprt == NULL || xprt->xp_ops == NULL || 757 xprt->xp_ops->xp_recv != svc_vc_recv) 758 continue; 759 cd = (struct cf_conn *)xprt->xp_p1; 760 if (!cleanblock && !cd->nonblock) 761 continue; 762 if (timeout == 0) { 763 timersub(&tv, &cd->last_recv_time, &tdiff); 764 if (timercmp(&tdiff, &tmax, >)) { 765 tmax = tdiff; 766 least_active = xprt; 767 } 768 continue; 769 } 770 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 771 __xprt_unregister_unlocked(xprt); 772 __svc_vc_dodestroy(xprt); 773 ncleaned++; 774 } 775 } 776 } 777 if (timeout == 0 && least_active != NULL) { 778 __xprt_unregister_unlocked(least_active); 779 __svc_vc_dodestroy(least_active); 780 ncleaned++; 781 } 782 rwlock_unlock(&svc_fd_lock); 783 return ncleaned > 0 ? TRUE : FALSE; 784} 785