1 /*- 2 * Copyright (c) 2009, Sun Microsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of Sun Microsystems, Inc. nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 * @(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro 29 * @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC 30 * $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ 31 * $FreeBSD: src/lib/libc/rpc/svc_vc.c,v 1.27 2008/03/30 09:36:17 dfr Exp $ 32 */ 33 34 /* 35 * svc_vc.c, Server side for Connection Oriented based RPC. 36 * 37 * Actually implements two flavors of transporter - 38 * a tcp rendezvouser (a listner and connection establisher) 39 * and a record/tcp stream. 40 */ 41 42 #include "namespace.h" 43 #include "reentrant.h" 44 #include <sys/types.h> 45 #include <sys/param.h> 46 #include <sys/poll.h> 47 #include <sys/socket.h> 48 #include <sys/un.h> 49 #include <sys/time.h> 50 #include <sys/uio.h> 51 #include <netinet/in.h> 52 #include <netinet/tcp.h> 53 54 #include <assert.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include <rpc/rpc.h> 64 65 #include "rpc_com.h" 66 #include "mt_misc.h" 67 #include "un-namespace.h" 68 69 static SVCXPRT *makefd_xprt(int, u_int, u_int); 70 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 71 static enum xprt_stat rendezvous_stat(SVCXPRT *); 72 static void svc_vc_destroy(SVCXPRT *); 73 static void __svc_vc_dodestroy (SVCXPRT *); 74 static int read_vc(void *, void *, int); 75 static int write_vc(void *, void *, int); 76 static enum xprt_stat svc_vc_stat(SVCXPRT *); 77 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 78 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 79 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 80 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 81 static void svc_vc_rendezvous_ops(SVCXPRT *); 82 static void svc_vc_ops(SVCXPRT *); 83 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 84 static bool_t svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, 85 void *in); 86 87 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 88 u_int sendsize; 89 u_int recvsize; 90 int maxrec; 91 }; 92 93 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 94 enum xprt_stat strm_stat; 95 u_int32_t x_id; 96 XDR xdrs; 97 char verf_body[MAX_AUTH_BYTES]; 98 u_int sendsize; 99 u_int recvsize; 100 int maxrec; 101 bool_t nonblock; 102 struct timeval last_recv_time; 103 }; 104 105 /* 106 * Usage: 107 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 108 * 109 * Creates, registers, and returns a (rpc) tcp based transporter. 110 * Once *xprt is initialized, it is registered as a transporter 111 * see (svc.h, xprt_register). This routine returns 112 * a NULL if a problem occurred. 113 * 114 * The filedescriptor passed in is expected to refer to a bound, but 115 * not yet connected socket. 116 * 117 * Since streams do buffered io similar to stdio, the caller can specify 118 * how big the send and receive buffers are via the second and third parms; 119 * 0 => use the system default. 120 */ 121 SVCXPRT * 122 svc_vc_create(int fd, u_int sendsize, u_int recvsize) 123 { 124 SVCXPRT *xprt = NULL; 125 struct cf_rendezvous *r = NULL; 126 struct __rpc_sockinfo si; 127 struct sockaddr_storage sslocal; 128 socklen_t slen; 129 130 if (!__rpc_fd2sockinfo(fd, &si)) 131 return NULL; 132 133 r = mem_alloc(sizeof(*r)); 134 if (r == NULL) { 135 warnx("svc_vc_create: out of memory"); 136 goto cleanup_svc_vc_create; 137 } 138 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 139 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 140 r->maxrec = __svc_maxrec; 141 xprt = mem_alloc(sizeof(SVCXPRT)); 142 if (xprt == NULL) { 143 warnx("svc_vc_create: out of memory"); 144 goto cleanup_svc_vc_create; 145 } 146 xprt->xp_tp = NULL; 147 xprt->xp_p1 = r; 148 xprt->xp_p2 = NULL; 149 xprt->xp_p3 = NULL; 150 xprt->xp_verf = _null_auth; 151 svc_vc_rendezvous_ops(xprt); 152 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 153 xprt->xp_fd = fd; 154 155 slen = sizeof (struct sockaddr_storage); 156 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 157 warnx("svc_vc_create: could not retrieve local addr"); 158 goto cleanup_svc_vc_create; 159 } 160 161 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 162 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 163 if (xprt->xp_ltaddr.buf == NULL) { 164 warnx("svc_vc_create: no mem for local addr"); 165 goto cleanup_svc_vc_create; 166 } 167 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 168 169 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 170 xprt_register(xprt); 171 return (xprt); 172 cleanup_svc_vc_create: 173 if (xprt) 174 mem_free(xprt, sizeof(*xprt)); 175 if (r != NULL) 176 mem_free(r, sizeof(*r)); 177 return (NULL); 178 } 179 180 /* 181 * Like svtcp_create(), except the routine takes any *open* UNIX file 182 * descriptor as its first input. 183 */ 184 SVCXPRT * 185 svc_fd_create(int fd, u_int sendsize, u_int recvsize) 186 { 187 struct sockaddr_storage ss; 188 socklen_t slen; 189 SVCXPRT *ret; 190 191 assert(fd != -1); 192 193 ret = makefd_xprt(fd, sendsize, recvsize); 194 if (ret == NULL) 195 return NULL; 196 197 slen = sizeof (struct sockaddr_storage); 198 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 199 warnx("svc_fd_create: could not retrieve local addr"); 200 goto freedata; 201 } 202 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 203 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 204 if (ret->xp_ltaddr.buf == NULL) { 205 warnx("svc_fd_create: no mem for local addr"); 206 goto freedata; 207 } 208 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 209 210 slen = sizeof (struct sockaddr_storage); 211 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 212 warnx("svc_fd_create: could not retrieve remote addr"); 213 goto freedata; 214 } 215 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 216 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 217 if (ret->xp_rtaddr.buf == NULL) { 218 warnx("svc_fd_create: no mem for local addr"); 219 goto freedata; 220 } 221 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 222 #ifdef PORTMAP 223 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 224 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 225 ret->xp_addrlen = sizeof (struct sockaddr_in); 226 } 227 #endif /* PORTMAP */ 228 229 return ret; 230 231 freedata: 232 if (ret->xp_ltaddr.buf != NULL) 233 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 234 235 return NULL; 236 } 237 238 static SVCXPRT * 239 makefd_xprt(int fd, u_int sendsize, u_int recvsize) 240 { 241 SVCXPRT *xprt; 242 struct cf_conn *cd; 243 const char *netid; 244 struct __rpc_sockinfo si; 245 246 assert(fd != -1); 247 248 xprt = mem_alloc(sizeof(SVCXPRT)); 249 if (xprt == NULL) { 250 warnx("svc_vc: makefd_xprt: out of memory"); 251 goto done; 252 } 253 memset(xprt, 0, sizeof *xprt); 254 cd = mem_alloc(sizeof(struct cf_conn)); 255 if (cd == NULL) { 256 warnx("svc_tcp: makefd_xprt: out of memory"); 257 mem_free(xprt, sizeof(SVCXPRT)); 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 __unused) 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 _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 mem_free(xprt, sizeof(SVCXPRT)); 402 } 403 404 /*ARGSUSED*/ 405 static bool_t 406 svc_vc_control(SVCXPRT *xprt __unused, const u_int rq __unused, 407 void *in __unused) 408 { 409 return (FALSE); 410 } 411 412 static bool_t 413 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 414 { 415 struct cf_rendezvous *cfp; 416 417 cfp = (struct cf_rendezvous *)xprt->xp_p1; 418 if (cfp == NULL) 419 return (FALSE); 420 switch (rq) { 421 case SVCGET_CONNMAXREC: 422 *(int *)in = cfp->maxrec; 423 break; 424 case SVCSET_CONNMAXREC: 425 cfp->maxrec = *(int *)in; 426 break; 427 default: 428 return (FALSE); 429 } 430 return (TRUE); 431 } 432 433 /* 434 * reads data from the tcp or uip connection. 435 * any error is fatal and the connection is closed. 436 * (And a read of zero bytes is a half closed stream => error.) 437 * All read operations timeout after 35 seconds. A timeout is 438 * fatal for the connection. 439 */ 440 static int 441 read_vc(void *xprtp, void *buf, int len) 442 { 443 SVCXPRT *xprt; 444 int sock; 445 int milliseconds = 35 * 1000; 446 struct pollfd pollfd; 447 struct cf_conn *cfp; 448 449 xprt = (SVCXPRT *)xprtp; 450 assert(xprt != NULL); 451 452 sock = xprt->xp_fd; 453 454 cfp = (struct cf_conn *)xprt->xp_p1; 455 456 if (cfp->nonblock) { 457 len = _read(sock, buf, (size_t)len); 458 if (len < 0) { 459 if (errno == EAGAIN) 460 len = 0; 461 else 462 goto fatal_err; 463 } 464 if (len != 0) 465 gettimeofday(&cfp->last_recv_time, NULL); 466 return len; 467 } 468 469 do { 470 pollfd.fd = sock; 471 pollfd.events = POLLIN; 472 pollfd.revents = 0; 473 switch (_poll(&pollfd, 1, milliseconds)) { 474 case -1: 475 if (errno == EINTR) 476 continue; 477 /*FALLTHROUGH*/ 478 case 0: 479 goto fatal_err; 480 481 default: 482 break; 483 } 484 } while ((pollfd.revents & POLLIN) == 0); 485 486 if ((len = _read(sock, buf, (size_t)len)) > 0) { 487 gettimeofday(&cfp->last_recv_time, NULL); 488 return (len); 489 } 490 491 fatal_err: 492 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 493 return (-1); 494 } 495 496 /* 497 * writes data to the tcp connection. 498 * Any error is fatal and the connection is closed. 499 */ 500 static int 501 write_vc(void *xprtp, void *buf, int len) 502 { 503 SVCXPRT *xprt; 504 int i, cnt; 505 struct cf_conn *cd; 506 struct timeval tv0, tv1; 507 508 xprt = (SVCXPRT *)xprtp; 509 assert(xprt != NULL); 510 511 cd = (struct cf_conn *)xprt->xp_p1; 512 513 if (cd->nonblock) 514 gettimeofday(&tv0, NULL); 515 516 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 517 i = _write(xprt->xp_fd, buf, (size_t)cnt); 518 if (i < 0) { 519 if (errno != EAGAIN || !cd->nonblock) { 520 cd->strm_stat = XPRT_DIED; 521 return (-1); 522 } 523 if (cd->nonblock && i != cnt) { 524 /* 525 * For non-blocking connections, do not 526 * take more than 2 seconds writing the 527 * data out. 528 * 529 * XXX 2 is an arbitrary amount. 530 */ 531 gettimeofday(&tv1, NULL); 532 if (tv1.tv_sec - tv0.tv_sec >= 2) { 533 cd->strm_stat = XPRT_DIED; 534 return (-1); 535 } 536 } 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 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 { 590 591 assert(xprt != NULL); 592 /* args_ptr may be NULL */ 593 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 594 args_ptr)); 595 } 596 597 static bool_t 598 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 599 { 600 XDR *xdrs; 601 602 assert(xprt != NULL); 603 /* args_ptr may be NULL */ 604 605 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 606 607 xdrs->x_op = XDR_FREE; 608 return ((*xdr_args)(xdrs, args_ptr)); 609 } 610 611 static bool_t 612 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 613 { 614 struct cf_conn *cd; 615 XDR *xdrs; 616 bool_t rstat; 617 618 assert(xprt != NULL); 619 assert(msg != NULL); 620 621 cd = (struct cf_conn *)(xprt->xp_p1); 622 xdrs = &(cd->xdrs); 623 624 xdrs->x_op = XDR_ENCODE; 625 msg->rm_xid = cd->x_id; 626 rstat = xdr_replymsg(xdrs, msg); 627 xdrrec_endofrecord(xdrs, TRUE); 628 return (rstat); 629 } 630 631 static void 632 svc_vc_ops(SVCXPRT *xprt) 633 { 634 static struct xp_ops ops; 635 static struct xp_ops2 ops2; 636 637 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 638 639 mutex_lock(&ops_lock); 640 if (ops.xp_recv == NULL) { 641 ops.xp_recv = svc_vc_recv; 642 ops.xp_stat = svc_vc_stat; 643 ops.xp_getargs = svc_vc_getargs; 644 ops.xp_reply = svc_vc_reply; 645 ops.xp_freeargs = svc_vc_freeargs; 646 ops.xp_destroy = svc_vc_destroy; 647 ops2.xp_control = svc_vc_control; 648 } 649 xprt->xp_ops = &ops; 650 xprt->xp_ops2 = &ops2; 651 mutex_unlock(&ops_lock); 652 } 653 654 static void 655 svc_vc_rendezvous_ops(SVCXPRT *xprt) 656 { 657 static struct xp_ops ops; 658 static struct xp_ops2 ops2; 659 660 mutex_lock(&ops_lock); 661 if (ops.xp_recv == NULL) { 662 ops.xp_recv = rendezvous_request; 663 ops.xp_stat = rendezvous_stat; 664 ops.xp_getargs = 665 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 666 ops.xp_reply = 667 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 668 ops.xp_freeargs = 669 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort, 670 ops.xp_destroy = svc_vc_destroy; 671 ops2.xp_control = svc_vc_rendezvous_control; 672 } 673 xprt->xp_ops = &ops; 674 xprt->xp_ops2 = &ops2; 675 mutex_unlock(&ops_lock); 676 } 677 678 /* 679 * Get the effective UID of the sending process. Used by rpcbind, keyserv 680 * and rpc.yppasswdd on AF_LOCAL. 681 */ 682 int 683 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) 684 { 685 int sock, ret; 686 gid_t egid; 687 uid_t euid; 688 struct sockaddr *sa; 689 690 sock = transp->xp_fd; 691 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 692 if (sa->sa_family == AF_LOCAL) { 693 ret = getpeereid(sock, &euid, &egid); 694 if (ret == 0) 695 *uid = euid; 696 return (ret); 697 } else 698 return (-1); 699 } 700 701 /* 702 * Destroy xprts that have not have had any activity in 'timeout' seconds. 703 * If 'cleanblock' is true, blocking connections (the default) are also 704 * cleaned. If timeout is 0, the least active connection is picked. 705 */ 706 bool_t 707 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 708 { 709 int i, ncleaned; 710 SVCXPRT *xprt, *least_active; 711 struct timeval tv, tdiff, tmax; 712 struct cf_conn *cd; 713 714 gettimeofday(&tv, NULL); 715 tmax.tv_sec = tmax.tv_usec = 0; 716 least_active = NULL; 717 rwlock_wrlock(&svc_fd_lock); 718 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 719 if (FD_ISSET(i, fds)) { 720 xprt = __svc_xports[i]; 721 if (xprt == NULL || xprt->xp_ops == NULL || 722 xprt->xp_ops->xp_recv != svc_vc_recv) 723 continue; 724 cd = (struct cf_conn *)xprt->xp_p1; 725 if (!cleanblock && !cd->nonblock) 726 continue; 727 if (timeout == 0) { 728 timersub(&tv, &cd->last_recv_time, &tdiff); 729 if (timercmp(&tdiff, &tmax, >)) { 730 tmax = tdiff; 731 least_active = xprt; 732 } 733 continue; 734 } 735 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 736 __xprt_unregister_unlocked(xprt); 737 __svc_vc_dodestroy(xprt); 738 ncleaned++; 739 } 740 } 741 } 742 if (timeout == 0 && least_active != NULL) { 743 __xprt_unregister_unlocked(least_active); 744 __svc_vc_dodestroy(least_active); 745 ncleaned++; 746 } 747 rwlock_unlock(&svc_fd_lock); 748 return ncleaned > 0 ? TRUE : FALSE; 749 } 750