svc_vc.c revision 1.21
1 /* $NetBSD: svc_vc.c,v 1.21 2008/04/25 17:44:44 christos Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: svc_vc.c,v 1.21 2008/04/25 17:44:44 christos Exp $"); 39 #endif 40 #endif 41 42 /* 43 * svc_vc.c, Server side for Connection Oriented based RPC. 44 * 45 * Actually implements two flavors of transporter - 46 * a tcp rendezvouser (a listner and connection establisher) 47 * and a record/tcp stream. 48 */ 49 50 #include "namespace.h" 51 #include "reentrant.h" 52 #include <sys/types.h> 53 #include <sys/param.h> 54 #include <sys/poll.h> 55 #include <sys/socket.h> 56 #include <sys/un.h> 57 #include <sys/time.h> 58 #include <netinet/in.h> 59 60 #include <assert.h> 61 #include <err.h> 62 #include <errno.h> 63 #include <fcntl.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 69 #include <rpc/rpc.h> 70 71 #include "rpc_internal.h" 72 73 #ifdef __weak_alias 74 __weak_alias(svc_fd_create,_svc_fd_create) 75 __weak_alias(svc_vc_create,_svc_vc_create) 76 #endif 77 78 #ifdef _REENTRANT 79 extern rwlock_t svc_fd_lock; 80 #endif 81 82 static SVCXPRT *makefd_xprt __P((int, u_int, u_int)); 83 static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *)); 84 static enum xprt_stat rendezvous_stat __P((SVCXPRT *)); 85 static void svc_vc_destroy __P((SVCXPRT *)); 86 static void __svc_vc_dodestroy __P((SVCXPRT *)); 87 static int read_vc __P((caddr_t, caddr_t, int)); 88 static int write_vc __P((caddr_t, caddr_t, int)); 89 static enum xprt_stat svc_vc_stat __P((SVCXPRT *)); 90 static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *)); 91 static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t)); 92 static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t)); 93 static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *)); 94 static void svc_vc_rendezvous_ops __P((SVCXPRT *)); 95 static void svc_vc_ops __P((SVCXPRT *)); 96 static bool_t svc_vc_control __P((SVCXPRT *, const u_int, void *)); 97 static bool_t svc_vc_rendezvous_control __P((SVCXPRT *, const u_int, 98 void *)); 99 100 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 101 u_int sendsize; 102 u_int recvsize; 103 int maxrec; 104 }; 105 106 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 107 enum xprt_stat strm_stat; 108 u_int32_t x_id; 109 XDR xdrs; 110 char verf_body[MAX_AUTH_BYTES]; 111 u_int sendsize; 112 u_int recvsize; 113 int maxrec; 114 bool_t nonblock; 115 struct timeval last_recv_time; 116 }; 117 118 /* 119 * Usage: 120 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 121 * 122 * Creates, registers, and returns a (rpc) tcp based transporter. 123 * Once *xprt is initialized, it is registered as a transporter 124 * see (svc.h, xprt_register). This routine returns 125 * a NULL if a problem occurred. 126 * 127 * The filedescriptor passed in is expected to refer to a bound, but 128 * not yet connected socket. 129 * 130 * Since streams do buffered io similar to stdio, the caller can specify 131 * how big the send and receive buffers are via the second and third parms; 132 * 0 => use the system default. 133 */ 134 SVCXPRT * 135 svc_vc_create(fd, sendsize, recvsize) 136 int fd; 137 u_int sendsize; 138 u_int recvsize; 139 { 140 SVCXPRT *xprt; 141 struct cf_rendezvous *r = NULL; 142 struct __rpc_sockinfo si; 143 struct sockaddr_storage sslocal; 144 socklen_t slen; 145 int one = 1; 146 147 if (!__rpc_fd2sockinfo(fd, &si)) 148 return NULL; 149 150 r = mem_alloc(sizeof(*r)); 151 if (r == NULL) { 152 warnx("svc_vc_create: out of memory"); 153 return NULL; 154 } 155 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 156 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 157 r->maxrec = __svc_maxrec; 158 xprt = mem_alloc(sizeof(SVCXPRT)); 159 if (xprt == NULL) { 160 warnx("svc_vc_create: out of memory"); 161 goto cleanup_svc_vc_create; 162 } 163 xprt->xp_tp = NULL; 164 xprt->xp_p1 = (caddr_t)(void *)r; 165 xprt->xp_p2 = NULL; 166 xprt->xp_p3 = NULL; 167 xprt->xp_verf = _null_auth; 168 svc_vc_rendezvous_ops(xprt); 169 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 170 xprt->xp_fd = fd; 171 172 slen = sizeof (struct sockaddr_storage); 173 if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 174 warnx("svc_vc_create: could not retrieve local addr"); 175 goto cleanup_svc_vc_create; 176 } 177 178 /* 179 * We want to be able to check credentials on local sockets. 180 */ 181 if (sslocal.ss_family == AF_LOCAL) 182 if (setsockopt(fd, 0, LOCAL_CREDS, &one, sizeof one) < 0) 183 goto cleanup_svc_vc_create; 184 185 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 186 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 187 if (xprt->xp_ltaddr.buf == NULL) { 188 warnx("svc_vc_create: no mem for local addr"); 189 goto cleanup_svc_vc_create; 190 } 191 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 192 193 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 194 xprt_register(xprt); 195 return (xprt); 196 cleanup_svc_vc_create: 197 if (xprt) 198 mem_free(xprt, sizeof(*xprt)); 199 if (r != NULL) 200 mem_free(r, sizeof(*r)); 201 return (NULL); 202 } 203 204 /* 205 * Like svtcp_create(), except the routine takes any *open* UNIX file 206 * descriptor as its first input. 207 */ 208 SVCXPRT * 209 svc_fd_create(fd, sendsize, recvsize) 210 int fd; 211 u_int sendsize; 212 u_int recvsize; 213 { 214 struct sockaddr_storage ss; 215 socklen_t slen; 216 SVCXPRT *ret; 217 218 _DIAGASSERT(fd != -1); 219 220 ret = makefd_xprt(fd, sendsize, recvsize); 221 if (ret == NULL) 222 return NULL; 223 224 slen = sizeof (struct sockaddr_storage); 225 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 226 warnx("svc_fd_create: could not retrieve local addr"); 227 goto freedata; 228 } 229 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 230 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 231 if (ret->xp_ltaddr.buf == NULL) { 232 warnx("svc_fd_create: no mem for local addr"); 233 goto freedata; 234 } 235 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 236 237 slen = sizeof (struct sockaddr_storage); 238 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 239 warnx("svc_fd_create: could not retrieve remote addr"); 240 goto freedata; 241 } 242 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 243 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 244 if (ret->xp_rtaddr.buf == NULL) { 245 warnx("svc_fd_create: no mem for local addr"); 246 goto freedata; 247 } 248 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 249 #ifdef PORTMAP 250 if (ss.ss_family == AF_INET) { 251 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 252 ret->xp_addrlen = sizeof (struct sockaddr_in); 253 } 254 #endif 255 256 return ret; 257 258 freedata: 259 if (ret->xp_ltaddr.buf != NULL) 260 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 261 262 return NULL; 263 } 264 265 static SVCXPRT * 266 makefd_xprt(fd, sendsize, recvsize) 267 int fd; 268 u_int sendsize; 269 u_int recvsize; 270 { 271 SVCXPRT *xprt; 272 struct cf_conn *cd; 273 const char *netid; 274 struct __rpc_sockinfo si; 275 276 _DIAGASSERT(fd != -1); 277 278 xprt = mem_alloc(sizeof(SVCXPRT)); 279 if (xprt == NULL) 280 goto out; 281 memset(xprt, 0, sizeof *xprt); 282 cd = mem_alloc(sizeof(struct cf_conn)); 283 if (cd == NULL) 284 goto out; 285 cd->strm_stat = XPRT_IDLE; 286 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 287 (caddr_t)(void *)xprt, read_vc, write_vc); 288 xprt->xp_p1 = (caddr_t)(void *)cd; 289 xprt->xp_verf.oa_base = cd->verf_body; 290 svc_vc_ops(xprt); /* truely deals with calls */ 291 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 292 xprt->xp_fd = fd; 293 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 294 if ((xprt->xp_netid = strdup(netid)) == NULL) 295 goto out; 296 297 xprt_register(xprt); 298 return (xprt); 299 out: 300 warn("svc_tcp: makefd_xprt"); 301 if (xprt) 302 mem_free(xprt, sizeof(SVCXPRT)); 303 return NULL; 304 } 305 306 /*ARGSUSED*/ 307 static bool_t 308 rendezvous_request(xprt, msg) 309 SVCXPRT *xprt; 310 struct rpc_msg *msg; 311 { 312 int sock, flags; 313 struct cf_rendezvous *r; 314 struct cf_conn *cd; 315 struct sockaddr_storage addr; 316 socklen_t len; 317 struct __rpc_sockinfo si; 318 SVCXPRT *newxprt; 319 fd_set cleanfds; 320 321 _DIAGASSERT(xprt != NULL); 322 _DIAGASSERT(msg != NULL); 323 324 r = (struct cf_rendezvous *)xprt->xp_p1; 325 again: 326 len = sizeof addr; 327 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 328 &len)) < 0) { 329 if (errno == EINTR) 330 goto again; 331 /* 332 * Clean out the most idle file descriptor when we're 333 * running out. 334 */ 335 if (errno == EMFILE || errno == ENFILE) { 336 cleanfds = svc_fdset; 337 if (__svc_clean_idle(&cleanfds, 0, FALSE)) 338 goto again; 339 } 340 return (FALSE); 341 } 342 /* 343 * make a new transporter (re-uses xprt) 344 */ 345 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 346 if (newxprt == NULL) 347 goto out; 348 newxprt->xp_rtaddr.buf = mem_alloc(len); 349 if (newxprt->xp_rtaddr.buf == NULL) 350 goto out; 351 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 352 newxprt->xp_rtaddr.len = len; 353 #ifdef PORTMAP 354 if (addr.ss_family == AF_INET) { 355 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 356 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 357 } 358 #endif 359 if (__rpc_fd2sockinfo(sock, &si)) 360 __rpc_setnodelay(sock, &si); 361 362 cd = (struct cf_conn *)newxprt->xp_p1; 363 364 cd->recvsize = r->recvsize; 365 cd->sendsize = r->sendsize; 366 cd->maxrec = r->maxrec; 367 368 if (cd->maxrec != 0) { 369 flags = fcntl(sock, F_GETFL, 0); 370 if (flags == -1) 371 goto out; 372 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 373 goto out; 374 if (cd->recvsize > cd->maxrec) 375 cd->recvsize = cd->maxrec; 376 cd->nonblock = TRUE; 377 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 378 } else 379 cd->nonblock = FALSE; 380 381 (void)gettimeofday(&cd->last_recv_time, NULL); 382 383 return (FALSE); /* there is never an rpc msg to be processed */ 384 out: 385 (void)close(sock); 386 return (FALSE); /* there was an error */ 387 } 388 389 /*ARGSUSED*/ 390 static enum xprt_stat 391 rendezvous_stat(xprt) 392 SVCXPRT *xprt; 393 { 394 395 return (XPRT_IDLE); 396 } 397 398 static void 399 svc_vc_destroy(xprt) 400 SVCXPRT *xprt; 401 { 402 _DIAGASSERT(xprt != NULL); 403 404 xprt_unregister(xprt); 405 __svc_vc_dodestroy(xprt); 406 } 407 408 static void 409 __svc_vc_dodestroy(xprt) 410 SVCXPRT *xprt; 411 { 412 struct cf_conn *cd; 413 struct cf_rendezvous *r; 414 415 cd = (struct cf_conn *)xprt->xp_p1; 416 417 if (xprt->xp_fd != RPC_ANYFD) 418 (void)close(xprt->xp_fd); 419 if (xprt->xp_port != 0) { 420 /* a rendezvouser socket */ 421 r = (struct cf_rendezvous *)xprt->xp_p1; 422 mem_free(r, sizeof (struct cf_rendezvous)); 423 xprt->xp_port = 0; 424 } else { 425 /* an actual connection socket */ 426 XDR_DESTROY(&(cd->xdrs)); 427 mem_free(cd, sizeof(struct cf_conn)); 428 } 429 if (xprt->xp_rtaddr.buf) 430 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 431 if (xprt->xp_ltaddr.buf) 432 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 433 if (xprt->xp_tp) 434 free(xprt->xp_tp); 435 if (xprt->xp_netid) 436 free(xprt->xp_netid); 437 mem_free(xprt, sizeof(SVCXPRT)); 438 } 439 440 /*ARGSUSED*/ 441 static bool_t 442 svc_vc_control(xprt, rq, in) 443 SVCXPRT *xprt; 444 const u_int rq; 445 void *in; 446 { 447 return (FALSE); 448 } 449 450 /*ARGSUSED*/ 451 static bool_t 452 svc_vc_rendezvous_control(xprt, rq, in) 453 SVCXPRT *xprt; 454 const u_int rq; 455 void *in; 456 { 457 struct cf_rendezvous *cfp; 458 459 cfp = (struct cf_rendezvous *)xprt->xp_p1; 460 if (cfp == NULL) 461 return (FALSE); 462 switch (rq) { 463 case SVCGET_CONNMAXREC: 464 *(int *)in = cfp->maxrec; 465 break; 466 case SVCSET_CONNMAXREC: 467 cfp->maxrec = *(int *)in; 468 break; 469 default: 470 return (FALSE); 471 } 472 return (TRUE); 473 } 474 475 /* 476 * reads data from the tcp connection. 477 * any error is fatal and the connection is closed. 478 * (And a read of zero bytes is a half closed stream => error.) 479 * All read operations timeout after 35 seconds. A timeout is 480 * fatal for the connection. 481 */ 482 static int 483 read_vc(xprtp, buf, len) 484 caddr_t xprtp; 485 caddr_t buf; 486 int len; 487 { 488 SVCXPRT *xprt; 489 int sock; 490 struct pollfd pollfd; 491 struct sockaddr *sa; 492 struct msghdr msg; 493 struct cmsghdr *cmp; 494 void *crmsg = NULL; 495 struct sockcred *sc; 496 socklen_t crmsgsize; 497 struct cf_conn *cfp; 498 static const struct timespec ts = { 35, 0 }; 499 500 xprt = (SVCXPRT *)(void *)xprtp; 501 _DIAGASSERT(xprt != NULL); 502 503 sock = xprt->xp_fd; 504 505 sa = (struct sockaddr *)xprt->xp_rtaddr.buf; 506 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) { 507 memset(&msg, 0, sizeof msg); 508 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS)); 509 crmsg = malloc(crmsgsize); 510 if (crmsg == NULL) 511 goto fatal_err; 512 memset(crmsg, 0, crmsgsize); 513 514 msg.msg_control = crmsg; 515 msg.msg_controllen = crmsgsize; 516 517 if (recvmsg(sock, &msg, 0) < 0) 518 goto fatal_err; 519 520 if (msg.msg_controllen == 0 || 521 (msg.msg_flags & MSG_CTRUNC) != 0) 522 goto fatal_err; 523 524 cmp = CMSG_FIRSTHDR(&msg); 525 if (cmp->cmsg_level != SOL_SOCKET || 526 cmp->cmsg_type != SCM_CREDS) 527 goto fatal_err; 528 529 sc = (struct sockcred *)(void *)CMSG_DATA(cmp); 530 531 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups)); 532 if (xprt->xp_p2 == NULL) 533 goto fatal_err; 534 535 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups)); 536 free(crmsg); 537 crmsg = NULL; 538 } 539 540 cfp = (struct cf_conn *)xprt->xp_p1; 541 542 if (cfp->nonblock) { 543 len = read(sock, buf, (size_t)len); 544 if (len < 0) { 545 if (errno == EAGAIN) 546 len = 0; 547 else 548 goto fatal_err; 549 } 550 if (len != 0) 551 gettimeofday(&cfp->last_recv_time, NULL); 552 return len; 553 } 554 555 do { 556 pollfd.fd = sock; 557 pollfd.events = POLLIN; 558 switch (pollts(&pollfd, 1, &ts, NULL)) { 559 case -1: 560 if (errno == EINTR) { 561 continue; 562 } 563 /*FALLTHROUGH*/ 564 case 0: 565 goto fatal_err; 566 567 default: 568 break; 569 } 570 } while ((pollfd.revents & POLLIN) == 0); 571 572 if ((len = read(sock, buf, (size_t)len)) > 0) { 573 gettimeofday(&cfp->last_recv_time, NULL); 574 return (len); 575 } 576 577 fatal_err: 578 if (crmsg != NULL) 579 free(crmsg); 580 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 581 return (-1); 582 } 583 584 /* 585 * writes data to the tcp connection. 586 * Any error is fatal and the connection is closed. 587 */ 588 static int 589 write_vc(xprtp, buf, len) 590 caddr_t xprtp; 591 caddr_t buf; 592 int len; 593 { 594 SVCXPRT *xprt; 595 int i, cnt; 596 struct cf_conn *cd; 597 struct timeval tv0, tv1; 598 599 xprt = (SVCXPRT *)(void *)xprtp; 600 _DIAGASSERT(xprt != NULL); 601 602 cd = (struct cf_conn *)xprt->xp_p1; 603 604 if (cd->nonblock) 605 gettimeofday(&tv0, NULL); 606 607 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 608 if ((i = write(xprt->xp_fd, buf, (size_t)cnt)) < 0) { 609 if (errno != EAGAIN || !cd->nonblock) { 610 cd->strm_stat = XPRT_DIED; 611 return (-1); 612 } 613 if (cd->nonblock && i != cnt) { 614 /* 615 * For non-blocking connections, do not 616 * take more than 2 seconds writing the 617 * data out. 618 * 619 * XXX 2 is an arbitrary amount. 620 */ 621 gettimeofday(&tv1, NULL); 622 if (tv1.tv_sec - tv0.tv_sec >= 2) { 623 cd->strm_stat = XPRT_DIED; 624 return (-1); 625 } 626 } 627 } 628 } 629 return (len); 630 } 631 632 static enum xprt_stat 633 svc_vc_stat(xprt) 634 SVCXPRT *xprt; 635 { 636 struct cf_conn *cd; 637 638 _DIAGASSERT(xprt != NULL); 639 640 cd = (struct cf_conn *)(xprt->xp_p1); 641 642 if (cd->strm_stat == XPRT_DIED) 643 return (XPRT_DIED); 644 if (! xdrrec_eof(&(cd->xdrs))) 645 return (XPRT_MOREREQS); 646 return (XPRT_IDLE); 647 } 648 649 static bool_t 650 svc_vc_recv(xprt, msg) 651 SVCXPRT *xprt; 652 struct rpc_msg *msg; 653 { 654 struct cf_conn *cd; 655 XDR *xdrs; 656 657 _DIAGASSERT(xprt != NULL); 658 _DIAGASSERT(msg != NULL); 659 660 cd = (struct cf_conn *)(xprt->xp_p1); 661 xdrs = &(cd->xdrs); 662 663 if (cd->nonblock) { 664 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 665 return FALSE; 666 } 667 668 xdrs->x_op = XDR_DECODE; 669 (void)xdrrec_skiprecord(xdrs); 670 671 if (xdr_callmsg(xdrs, msg)) { 672 cd->x_id = msg->rm_xid; 673 return (TRUE); 674 } 675 cd->strm_stat = XPRT_DIED; 676 return (FALSE); 677 } 678 679 static bool_t 680 svc_vc_getargs(xprt, xdr_args, args_ptr) 681 SVCXPRT *xprt; 682 xdrproc_t xdr_args; 683 caddr_t args_ptr; 684 { 685 686 _DIAGASSERT(xprt != NULL); 687 /* args_ptr may be NULL */ 688 689 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 690 args_ptr)); 691 } 692 693 static bool_t 694 svc_vc_freeargs(xprt, xdr_args, args_ptr) 695 SVCXPRT *xprt; 696 xdrproc_t xdr_args; 697 caddr_t args_ptr; 698 { 699 XDR *xdrs; 700 701 _DIAGASSERT(xprt != NULL); 702 /* args_ptr may be NULL */ 703 704 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 705 706 xdrs->x_op = XDR_FREE; 707 return ((*xdr_args)(xdrs, args_ptr)); 708 } 709 710 static bool_t 711 svc_vc_reply(xprt, msg) 712 SVCXPRT *xprt; 713 struct rpc_msg *msg; 714 { 715 struct cf_conn *cd; 716 XDR *xdrs; 717 bool_t rstat; 718 719 _DIAGASSERT(xprt != NULL); 720 _DIAGASSERT(msg != NULL); 721 722 cd = (struct cf_conn *)(xprt->xp_p1); 723 xdrs = &(cd->xdrs); 724 725 xdrs->x_op = XDR_ENCODE; 726 msg->rm_xid = cd->x_id; 727 rstat = xdr_replymsg(xdrs, msg); 728 (void)xdrrec_endofrecord(xdrs, TRUE); 729 return (rstat); 730 } 731 732 static void 733 svc_vc_ops(xprt) 734 SVCXPRT *xprt; 735 { 736 static struct xp_ops ops; 737 static struct xp_ops2 ops2; 738 #ifdef _REENTRANT 739 extern mutex_t ops_lock; 740 #endif 741 742 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 743 744 mutex_lock(&ops_lock); 745 if (ops.xp_recv == NULL) { 746 ops.xp_recv = svc_vc_recv; 747 ops.xp_stat = svc_vc_stat; 748 ops.xp_getargs = svc_vc_getargs; 749 ops.xp_reply = svc_vc_reply; 750 ops.xp_freeargs = svc_vc_freeargs; 751 ops.xp_destroy = svc_vc_destroy; 752 ops2.xp_control = svc_vc_control; 753 } 754 xprt->xp_ops = &ops; 755 xprt->xp_ops2 = &ops2; 756 mutex_unlock(&ops_lock); 757 } 758 759 static void 760 svc_vc_rendezvous_ops(xprt) 761 SVCXPRT *xprt; 762 { 763 static struct xp_ops ops; 764 static struct xp_ops2 ops2; 765 #ifdef _REENTRANT 766 extern mutex_t ops_lock; 767 #endif 768 /* XXXGCC vax compiler unhappy otherwise */ 769 #ifdef __vax__ 770 extern void abort(void); 771 #endif 772 773 mutex_lock(&ops_lock); 774 if (ops.xp_recv == NULL) { 775 ops.xp_recv = rendezvous_request; 776 ops.xp_stat = rendezvous_stat; 777 ops.xp_getargs = 778 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 779 ops.xp_reply = 780 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort; 781 ops.xp_freeargs = 782 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 783 ops.xp_destroy = svc_vc_destroy; 784 ops2.xp_control = svc_vc_rendezvous_control; 785 } 786 xprt->xp_ops = &ops; 787 xprt->xp_ops2 = &ops2; 788 mutex_unlock(&ops_lock); 789 } 790 791 /* 792 * Destroy xprts that have not have had any activity in 'timeout' seconds. 793 * If 'cleanblock' is true, blocking connections (the default) are also 794 * cleaned. If timeout is 0, the least active connection is picked. 795 */ 796 bool_t 797 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 798 { 799 int i, ncleaned; 800 SVCXPRT *xprt, *least_active; 801 struct timeval tv, tdiff, tmax; 802 struct cf_conn *cd; 803 804 gettimeofday(&tv, NULL); 805 tmax.tv_sec = tmax.tv_usec = 0; 806 least_active = NULL; 807 rwlock_wrlock(&svc_fd_lock); 808 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 809 if (FD_ISSET(i, fds)) { 810 xprt = __svc_xports[i]; 811 if (xprt == NULL || xprt->xp_ops == NULL || 812 xprt->xp_ops->xp_recv != svc_vc_recv) 813 continue; 814 cd = (struct cf_conn *)xprt->xp_p1; 815 if (!cleanblock && !cd->nonblock) 816 continue; 817 if (timeout == 0) { 818 timersub(&tv, &cd->last_recv_time, &tdiff); 819 if (timercmp(&tdiff, &tmax, >)) { 820 tmax = tdiff; 821 least_active = xprt; 822 } 823 continue; 824 } 825 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 826 __xprt_unregister_unlocked(xprt); 827 __svc_vc_dodestroy(xprt); 828 ncleaned++; 829 } 830 } 831 } 832 if (timeout == 0 && least_active != NULL) { 833 __xprt_unregister_unlocked(least_active); 834 __svc_vc_dodestroy(least_active); 835 ncleaned++; 836 } 837 rwlock_unlock(&svc_fd_lock); 838 return ncleaned > 0 ? TRUE : FALSE; 839 } 840
Indexes created Thu Oct 02 14:10:14 GMT 2025