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) 32 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 33 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 34 #endif 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 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 73 static SVCXPRT *makefd_xprt(int, u_int, u_int); 74 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 75 static enum xprt_stat rendezvous_stat(SVCXPRT *); 76 static void svc_vc_destroy(SVCXPRT *); 77 static void __svc_vc_dodestroy (SVCXPRT *); 78 static int read_vc(void *, void *, int); 79 static int write_vc(void *, void *, int); 80 static enum xprt_stat svc_vc_stat(SVCXPRT *); 81 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 82 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 83 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 84 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 85 static void svc_vc_rendezvous_ops(SVCXPRT *); 86 static void svc_vc_ops(SVCXPRT *); 87 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 88 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 89 void *in); 90 91 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 92 u_int sendsize; 93 u_int recvsize; 94 int maxrec; 95 }; 96 97 struct 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 */ 125 SVCXPRT * 126 svc_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); 173 cleanup_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 */ 185 SVCXPRT * 186 svc_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; 231 232 freedata: 233 if (ret->xp_ltaddr.buf != NULL) 234 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 235 236 return NULL; 237 } 238 239 static SVCXPRT * 240 makefd_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); 273 done: 274 return (xprt); 275 } 276 277 /*ARGSUSED*/ 278 static bool_t 279 rendezvous_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; 285 socklen_t len; 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; 294 again: 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; 350 351 gettimeofday(&cd->last_recv_time, NULL); 352 353 return (FALSE); /* there is never an rpc msg to be processed */ 354 } 355 356 /*ARGSUSED*/ 357 static enum xprt_stat 358 rendezvous_stat(SVCXPRT *xprt) 359 { 360 361 return (XPRT_IDLE); 362 } 363 364 static void 365 svc_vc_destroy(SVCXPRT *xprt) 366 { 367 assert(xprt != NULL); 368 369 xprt_unregister(xprt); 370 __svc_vc_dodestroy(xprt); 371 } 372 373 static void 374 __svc_vc_dodestroy(SVCXPRT *xprt) 375 { 376 struct cf_conn *cd; 377 struct cf_rendezvous *r; 378 379 cd = (struct cf_conn *)xprt->xp_p1; 380 381 if (xprt->xp_fd != RPC_ANYFD) 382 (void)_close(xprt->xp_fd); 383 if (xprt->xp_port != 0) { 384 /* a rendezvouser socket */ 385 r = (struct cf_rendezvous *)xprt->xp_p1; 386 mem_free(r, sizeof (struct cf_rendezvous)); 387 xprt->xp_port = 0; 388 } else { 389 /* an actual connection socket */ 390 XDR_DESTROY(&(cd->xdrs)); 391 mem_free(cd, sizeof(struct cf_conn)); 392 } 393 if (xprt->xp_rtaddr.buf) 394 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 395 if (xprt->xp_ltaddr.buf) 396 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 397 if (xprt->xp_tp) 398 free(xprt->xp_tp); 399 if (xprt->xp_netid) 400 free(xprt->xp_netid); 401 svc_xprt_free(xprt); 402 } 403 404 /*ARGSUSED*/ 405 static bool_t 406 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 407 { 408 return (FALSE); 409 } 410 411 static bool_t 412 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 413 { 414 struct cf_rendezvous *cfp; 415 416 cfp = (struct cf_rendezvous *)xprt->xp_p1; 417 if (cfp == NULL) 418 return (FALSE); 419 switch (rq) { 420 case SVCGET_CONNMAXREC: 421 *(int *)in = cfp->maxrec; 422 break; 423 case SVCSET_CONNMAXREC: 424 cfp->maxrec = *(int *)in; 425 break; 426 default: 427 return (FALSE); 428 } 429 return (TRUE); 430 } 431 432 /* 433 * reads data from the tcp or uip connection. 434 * any error is fatal and the connection is closed. 435 * (And a read of zero bytes is a half closed stream => error.) 436 * All read operations timeout after 35 seconds. A timeout is 437 * fatal for the connection. 438 */ 439 static int 440 read_vc(void *xprtp, void *buf, int len) 441 { 442 SVCXPRT *xprt; 443 int sock; 444 int milliseconds = 35 * 1000; 445 struct pollfd pollfd; 446 struct cf_conn *cfp; 447 448 xprt = (SVCXPRT *)xprtp; 449 assert(xprt != NULL); 450 451 sock = xprt->xp_fd; 452 453 cfp = (struct cf_conn *)xprt->xp_p1; 454 455 if (cfp->nonblock) { 456 len = _read(sock, buf, (size_t)len); 457 if (len < 0) { 458 if (errno == EAGAIN) 459 len = 0; 460 else 461 goto fatal_err; 462 } 463 if (len != 0) 464 gettimeofday(&cfp->last_recv_time, NULL); 465 return len; 466 } 467 468 do { 469 pollfd.fd = sock; 470 pollfd.events = POLLIN; 471 pollfd.revents = 0; 472 switch (_poll(&pollfd, 1, milliseconds)) { 473 case -1: 474 if (errno == EINTR) 475 continue; 476 /*FALLTHROUGH*/ 477 case 0: 478 goto fatal_err; 479 480 default: 481 break; 482 } 483 } while ((pollfd.revents & POLLIN) == 0); 484 485 if ((len = _read(sock, buf, (size_t)len)) > 0) { 486 gettimeofday(&cfp->last_recv_time, NULL); 487 return (len); 488 } 489 490 fatal_err: 491 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 492 return (-1); 493 } 494 495 /* 496 * writes data to the tcp connection. 497 * Any error is fatal and the connection is closed. 498 */ 499 static int 500 write_vc(void *xprtp, void *buf, int len) 501 { 502 SVCXPRT *xprt; 503 int i, cnt; 504 struct cf_conn *cd; 505 struct timeval tv0, tv1; 506 507 xprt = (SVCXPRT *)xprtp; 508 assert(xprt != NULL); 509 510 cd = (struct cf_conn *)xprt->xp_p1; 511 512 if (cd->nonblock) 513 gettimeofday(&tv0, NULL); 514 515 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 516 i = _write(xprt->xp_fd, buf, (size_t)cnt); 517 if (i < 0) { 518 if (errno != EAGAIN || !cd->nonblock) { 519 cd->strm_stat = XPRT_DIED; 520 return (-1); 521 } 522 if (cd->nonblock) { 523 /* 524 * For non-blocking connections, do not 525 * take more than 2 seconds writing the 526 * data out. 527 * 528 * XXX 2 is an arbitrary amount. 529 */ 530 gettimeofday(&tv1, NULL); 531 if (tv1.tv_sec - tv0.tv_sec >= 2) { 532 cd->strm_stat = XPRT_DIED; 533 return (-1); 534 } 535 } 536 i = 0; 537 } 538 } 539 540 return (len); 541 } 542 543 static enum xprt_stat 544 svc_vc_stat(SVCXPRT *xprt) 545 { 546 struct cf_conn *cd; 547 548 assert(xprt != NULL); 549 550 cd = (struct cf_conn *)(xprt->xp_p1); 551 552 if (cd->strm_stat == XPRT_DIED) 553 return (XPRT_DIED); 554 if (! xdrrec_eof(&(cd->xdrs))) 555 return (XPRT_MOREREQS); 556 return (XPRT_IDLE); 557 } 558 559 static bool_t 560 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 561 { 562 struct cf_conn *cd; 563 XDR *xdrs; 564 565 assert(xprt != NULL); 566 assert(msg != NULL); 567 568 cd = (struct cf_conn *)(xprt->xp_p1); 569 xdrs = &(cd->xdrs); 570 571 if (cd->nonblock) { 572 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 573 return FALSE; 574 } else { 575 (void)xdrrec_skiprecord(xdrs); 576 } 577 578 xdrs->x_op = XDR_DECODE; 579 if (xdr_callmsg(xdrs, msg)) { 580 cd->x_id = msg->rm_xid; 581 return (TRUE); 582 } 583 cd->strm_stat = XPRT_DIED; 584 return (FALSE); 585 } 586 587 static bool_t 588 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 589 { 590 struct cf_conn *cd; 591 592 assert(xprt != NULL); 593 cd = (struct cf_conn *)(xprt->xp_p1); 594 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt), 595 &cd->xdrs, xdr_args, args_ptr)); 596 } 597 598 static bool_t 599 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 600 { 601 XDR *xdrs; 602 603 assert(xprt != NULL); 604 /* args_ptr may be NULL */ 605 606 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 607 608 xdrs->x_op = XDR_FREE; 609 return ((*xdr_args)(xdrs, args_ptr)); 610 } 611 612 static bool_t 613 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 614 { 615 struct cf_conn *cd; 616 XDR *xdrs; 617 bool_t rstat; 618 xdrproc_t xdr_proc; 619 caddr_t xdr_where; 620 u_int pos; 621 622 assert(xprt != NULL); 623 assert(msg != NULL); 624 625 cd = (struct cf_conn *)(xprt->xp_p1); 626 xdrs = &(cd->xdrs); 627 628 xdrs->x_op = XDR_ENCODE; 629 msg->rm_xid = cd->x_id; 630 rstat = TRUE; 631 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 632 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 633 xdr_proc = msg->acpted_rply.ar_results.proc; 634 xdr_where = msg->acpted_rply.ar_results.where; 635 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 636 msg->acpted_rply.ar_results.where = NULL; 637 638 pos = XDR_GETPOS(xdrs); 639 if (!xdr_replymsg(xdrs, msg) || 640 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) { 641 XDR_SETPOS(xdrs, pos); 642 rstat = FALSE; 643 } 644 } else { 645 rstat = xdr_replymsg(xdrs, msg); 646 } 647 648 if (rstat) 649 (void)xdrrec_endofrecord(xdrs, TRUE); 650 651 return (rstat); 652 } 653 654 static void 655 svc_vc_ops(SVCXPRT *xprt) 656 { 657 static struct xp_ops ops; 658 static struct xp_ops2 ops2; 659 660 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 661 662 mutex_lock(&ops_lock); 663 if (ops.xp_recv == NULL) { 664 ops.xp_recv = svc_vc_recv; 665 ops.xp_stat = svc_vc_stat; 666 ops.xp_getargs = svc_vc_getargs; 667 ops.xp_reply = svc_vc_reply; 668 ops.xp_freeargs = svc_vc_freeargs; 669 ops.xp_destroy = svc_vc_destroy; 670 ops2.xp_control = svc_vc_control; 671 } 672 xprt->xp_ops = &ops; 673 xprt->xp_ops2 = &ops2; 674 mutex_unlock(&ops_lock); 675 } 676 677 static void 678 svc_vc_rendezvous_ops(SVCXPRT *xprt) 679 { 680 static struct xp_ops ops; 681 static struct xp_ops2 ops2; 682 683 mutex_lock(&ops_lock); 684 if (ops.xp_recv == NULL) { 685 ops.xp_recv = rendezvous_request; 686 ops.xp_stat = rendezvous_stat; 687 ops.xp_getargs = 688 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 689 ops.xp_reply = 690 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 691 ops.xp_freeargs = 692 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort, 693 ops.xp_destroy = svc_vc_destroy; 694 ops2.xp_control = svc_vc_rendezvous_control; 695 } 696 xprt->xp_ops = &ops; 697 xprt->xp_ops2 = &ops2; 698 mutex_unlock(&ops_lock); 699 } 700 701 /* 702 * Get the effective UID of the sending process. Used by rpcbind, keyserv 703 * and rpc.yppasswdd on AF_LOCAL. 704 */ 705 int 706 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 707 int sock, ret; 708 gid_t egid; 709 uid_t euid; 710 struct sockaddr *sa; 711 712 sock = transp->xp_fd; 713 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 714 if (sa->sa_family == AF_LOCAL) { 715 ret = getpeereid(sock, &euid, &egid); 716 if (ret == 0) 717 *uid = euid; 718 return (ret); 719 } else 720 return (-1); 721 } 722 723 /* 724 * Destroy xprts that have not have had any activity in 'timeout' seconds. 725 * If 'cleanblock' is true, blocking connections (the default) are also 726 * cleaned. If timeout is 0, the least active connection is picked. 727 */ 728 bool_t 729 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 730 { 731 int i, ncleaned; 732 SVCXPRT *xprt, *least_active; 733 struct timeval tv, tdiff, tmax; 734 struct cf_conn *cd; 735 736 gettimeofday(&tv, NULL); 737 tmax.tv_sec = tmax.tv_usec = 0; 738 least_active = NULL; 739 rwlock_wrlock(&svc_fd_lock); 740 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 741 if (FD_ISSET(i, fds)) { 742 xprt = __svc_xports[i]; 743 if (xprt == NULL || xprt->xp_ops == NULL || 744 xprt->xp_ops->xp_recv != svc_vc_recv) 745 continue; 746 cd = (struct cf_conn *)xprt->xp_p1; 747 if (!cleanblock && !cd->nonblock) 748 continue; 749 if (timeout == 0) { 750 timersub(&tv, &cd->last_recv_time, &tdiff); 751 if (timercmp(&tdiff, &tmax, >)) { 752 tmax = tdiff; 753 least_active = xprt; 754 } 755 continue; 756 } 757 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 758 __xprt_unregister_unlocked(xprt); 759 __svc_vc_dodestroy(xprt); 760 ncleaned++; 761 } 762 } 763 } 764 if (timeout == 0 && least_active != NULL) { 765 __xprt_unregister_unlocked(least_active); 766 __svc_vc_dodestroy(least_active); 767 ncleaned++; 768 } 769 rwlock_unlock(&svc_fd_lock); 770 return ncleaned > 0 ? TRUE : FALSE; 771 } 772