svc_vc.c revision 1.19
1 /* $NetBSD: svc_vc.c,v 1.19 2006/06/22 19:35:34 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 1.19 2006/06/22 19:35:34 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 warnx("svc_vc: makefd_xprt: out of memory"); 281 goto done; 282 } 283 memset(xprt, 0, sizeof *xprt); 284 cd = mem_alloc(sizeof(struct cf_conn)); 285 if (cd == NULL) { 286 warnx("svc_tcp: makefd_xprt: out of memory"); 287 mem_free(xprt, sizeof(SVCXPRT)); 288 xprt = NULL; 289 goto done; 290 } 291 cd->strm_stat = XPRT_IDLE; 292 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 293 (caddr_t)(void *)xprt, read_vc, write_vc); 294 xprt->xp_p1 = (caddr_t)(void *)cd; 295 xprt->xp_verf.oa_base = cd->verf_body; 296 svc_vc_ops(xprt); /* truely deals with calls */ 297 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 298 xprt->xp_fd = fd; 299 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 300 xprt->xp_netid = strdup(netid); 301 302 xprt_register(xprt); 303 done: 304 return (xprt); 305 } 306 307 /*ARGSUSED*/ 308 static bool_t 309 rendezvous_request(xprt, msg) 310 SVCXPRT *xprt; 311 struct rpc_msg *msg; 312 { 313 int sock, flags; 314 struct cf_rendezvous *r; 315 struct cf_conn *cd; 316 struct sockaddr_storage addr; 317 socklen_t len; 318 struct __rpc_sockinfo si; 319 SVCXPRT *newxprt; 320 fd_set cleanfds; 321 322 _DIAGASSERT(xprt != NULL); 323 _DIAGASSERT(msg != NULL); 324 325 r = (struct cf_rendezvous *)xprt->xp_p1; 326 again: 327 len = sizeof addr; 328 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 329 &len)) < 0) { 330 if (errno == EINTR) 331 goto again; 332 /* 333 * Clean out the most idle file descriptor when we're 334 * running out. 335 */ 336 if (errno == EMFILE || errno == ENFILE) { 337 cleanfds = svc_fdset; 338 __svc_clean_idle(&cleanfds, 0, FALSE); 339 goto again; 340 } 341 return (FALSE); 342 } 343 /* 344 * make a new transporter (re-uses xprt) 345 */ 346 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 347 newxprt->xp_rtaddr.buf = mem_alloc(len); 348 if (newxprt->xp_rtaddr.buf == NULL) 349 return (FALSE); 350 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 351 newxprt->xp_rtaddr.len = len; 352 #ifdef PORTMAP 353 if (addr.ss_family == AF_INET) { 354 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 355 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 356 } 357 #endif 358 if (__rpc_fd2sockinfo(sock, &si)) 359 __rpc_setnodelay(sock, &si); 360 361 cd = (struct cf_conn *)newxprt->xp_p1; 362 363 cd->recvsize = r->recvsize; 364 cd->sendsize = r->sendsize; 365 cd->maxrec = r->maxrec; 366 367 if (cd->maxrec != 0) { 368 flags = fcntl(sock, F_GETFL, 0); 369 if (flags == -1) 370 return (FALSE); 371 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 372 return (FALSE); 373 if (cd->recvsize > cd->maxrec) 374 cd->recvsize = cd->maxrec; 375 cd->nonblock = TRUE; 376 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 377 } else 378 cd->nonblock = FALSE; 379 380 gettimeofday(&cd->last_recv_time, NULL); 381 382 return (FALSE); /* there is never an rpc msg to be processed */ 383 } 384 385 /*ARGSUSED*/ 386 static enum xprt_stat 387 rendezvous_stat(xprt) 388 SVCXPRT *xprt; 389 { 390 391 return (XPRT_IDLE); 392 } 393 394 static void 395 svc_vc_destroy(xprt) 396 SVCXPRT *xprt; 397 { 398 _DIAGASSERT(xprt != NULL); 399 400 xprt_unregister(xprt); 401 __svc_vc_dodestroy(xprt); 402 } 403 404 static void 405 __svc_vc_dodestroy(xprt) 406 SVCXPRT *xprt; 407 { 408 struct cf_conn *cd; 409 struct cf_rendezvous *r; 410 411 cd = (struct cf_conn *)xprt->xp_p1; 412 413 if (xprt->xp_fd != RPC_ANYFD) 414 (void)close(xprt->xp_fd); 415 if (xprt->xp_port != 0) { 416 /* a rendezvouser socket */ 417 r = (struct cf_rendezvous *)xprt->xp_p1; 418 mem_free(r, sizeof (struct cf_rendezvous)); 419 xprt->xp_port = 0; 420 } else { 421 /* an actual connection socket */ 422 XDR_DESTROY(&(cd->xdrs)); 423 mem_free(cd, sizeof(struct cf_conn)); 424 } 425 if (xprt->xp_rtaddr.buf) 426 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 427 if (xprt->xp_ltaddr.buf) 428 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 429 if (xprt->xp_tp) 430 free(xprt->xp_tp); 431 if (xprt->xp_netid) 432 free(xprt->xp_netid); 433 mem_free(xprt, sizeof(SVCXPRT)); 434 } 435 436 /*ARGSUSED*/ 437 static bool_t 438 svc_vc_control(xprt, rq, in) 439 SVCXPRT *xprt; 440 const u_int rq; 441 void *in; 442 { 443 return (FALSE); 444 } 445 446 /*ARGSUSED*/ 447 static bool_t 448 svc_vc_rendezvous_control(xprt, rq, in) 449 SVCXPRT *xprt; 450 const u_int rq; 451 void *in; 452 { 453 struct cf_rendezvous *cfp; 454 455 cfp = (struct cf_rendezvous *)xprt->xp_p1; 456 if (cfp == NULL) 457 return (FALSE); 458 switch (rq) { 459 case SVCGET_CONNMAXREC: 460 *(int *)in = cfp->maxrec; 461 break; 462 case SVCSET_CONNMAXREC: 463 cfp->maxrec = *(int *)in; 464 break; 465 default: 466 return (FALSE); 467 } 468 return (TRUE); 469 } 470 471 /* 472 * reads data from the tcp connection. 473 * any error is fatal and the connection is closed. 474 * (And a read of zero bytes is a half closed stream => error.) 475 * All read operations timeout after 35 seconds. A timeout is 476 * fatal for the connection. 477 */ 478 static int 479 read_vc(xprtp, buf, len) 480 caddr_t xprtp; 481 caddr_t buf; 482 int len; 483 { 484 SVCXPRT *xprt; 485 int sock; 486 struct pollfd pollfd; 487 struct sockaddr *sa; 488 struct msghdr msg; 489 struct cmsghdr *cmp; 490 void *crmsg = NULL; 491 struct sockcred *sc; 492 socklen_t crmsgsize; 493 struct cf_conn *cfp; 494 static const struct timespec ts = { 35, 0 }; 495 496 xprt = (SVCXPRT *)(void *)xprtp; 497 _DIAGASSERT(xprt != NULL); 498 499 sock = xprt->xp_fd; 500 501 sa = (struct sockaddr *)xprt->xp_rtaddr.buf; 502 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) { 503 memset(&msg, 0, sizeof msg); 504 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS)); 505 crmsg = malloc(crmsgsize); 506 if (crmsg == NULL) 507 goto fatal_err; 508 memset(crmsg, 0, crmsgsize); 509 510 msg.msg_control = crmsg; 511 msg.msg_controllen = crmsgsize; 512 513 if (recvmsg(sock, &msg, 0) < 0) 514 goto fatal_err; 515 516 if (msg.msg_controllen == 0 || 517 (msg.msg_flags & MSG_CTRUNC) != 0) 518 goto fatal_err; 519 520 cmp = CMSG_FIRSTHDR(&msg); 521 if (cmp->cmsg_level != SOL_SOCKET || 522 cmp->cmsg_type != SCM_CREDS) 523 goto fatal_err; 524 525 sc = (struct sockcred *)(void *)CMSG_DATA(cmp); 526 527 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups)); 528 if (xprt->xp_p2 == NULL) 529 goto fatal_err; 530 531 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups)); 532 free(crmsg); 533 crmsg = NULL; 534 } 535 536 cfp = (struct cf_conn *)xprt->xp_p1; 537 538 if (cfp->nonblock) { 539 len = read(sock, buf, (size_t)len); 540 if (len < 0) { 541 if (errno == EAGAIN) 542 len = 0; 543 else 544 goto fatal_err; 545 } 546 if (len != 0) 547 gettimeofday(&cfp->last_recv_time, NULL); 548 return len; 549 } 550 551 do { 552 pollfd.fd = sock; 553 pollfd.events = POLLIN; 554 switch (pollts(&pollfd, 1, &ts, NULL)) { 555 case -1: 556 if (errno == EINTR) { 557 continue; 558 } 559 /*FALLTHROUGH*/ 560 case 0: 561 goto fatal_err; 562 563 default: 564 break; 565 } 566 } while ((pollfd.revents & POLLIN) == 0); 567 568 if ((len = read(sock, buf, (size_t)len)) > 0) { 569 gettimeofday(&cfp->last_recv_time, NULL); 570 return (len); 571 } 572 573 fatal_err: 574 if (crmsg != NULL) 575 free(crmsg); 576 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 577 return (-1); 578 } 579 580 /* 581 * writes data to the tcp connection. 582 * Any error is fatal and the connection is closed. 583 */ 584 static int 585 write_vc(xprtp, buf, len) 586 caddr_t xprtp; 587 caddr_t buf; 588 int len; 589 { 590 SVCXPRT *xprt; 591 int i, cnt; 592 struct cf_conn *cd; 593 struct timeval tv0, tv1; 594 595 xprt = (SVCXPRT *)(void *)xprtp; 596 _DIAGASSERT(xprt != NULL); 597 598 cd = (struct cf_conn *)xprt->xp_p1; 599 600 if (cd->nonblock) 601 gettimeofday(&tv0, NULL); 602 603 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 604 if ((i = write(xprt->xp_fd, buf, (size_t)cnt)) < 0) { 605 if (errno != EAGAIN || !cd->nonblock) { 606 cd->strm_stat = XPRT_DIED; 607 return (-1); 608 } 609 if (cd->nonblock && i != cnt) { 610 /* 611 * For non-blocking connections, do not 612 * take more than 2 seconds writing the 613 * data out. 614 * 615 * XXX 2 is an arbitrary amount. 616 */ 617 gettimeofday(&tv1, NULL); 618 if (tv1.tv_sec - tv0.tv_sec >= 2) { 619 cd->strm_stat = XPRT_DIED; 620 return (-1); 621 } 622 } 623 } 624 } 625 return (len); 626 } 627 628 static enum xprt_stat 629 svc_vc_stat(xprt) 630 SVCXPRT *xprt; 631 { 632 struct cf_conn *cd; 633 634 _DIAGASSERT(xprt != NULL); 635 636 cd = (struct cf_conn *)(xprt->xp_p1); 637 638 if (cd->strm_stat == XPRT_DIED) 639 return (XPRT_DIED); 640 if (! xdrrec_eof(&(cd->xdrs))) 641 return (XPRT_MOREREQS); 642 return (XPRT_IDLE); 643 } 644 645 static bool_t 646 svc_vc_recv(xprt, msg) 647 SVCXPRT *xprt; 648 struct rpc_msg *msg; 649 { 650 struct cf_conn *cd; 651 XDR *xdrs; 652 653 _DIAGASSERT(xprt != NULL); 654 _DIAGASSERT(msg != NULL); 655 656 cd = (struct cf_conn *)(xprt->xp_p1); 657 xdrs = &(cd->xdrs); 658 659 if (cd->nonblock) { 660 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 661 return FALSE; 662 } 663 664 xdrs->x_op = XDR_DECODE; 665 (void)xdrrec_skiprecord(xdrs); 666 667 if (xdr_callmsg(xdrs, msg)) { 668 cd->x_id = msg->rm_xid; 669 return (TRUE); 670 } 671 cd->strm_stat = XPRT_DIED; 672 return (FALSE); 673 } 674 675 static bool_t 676 svc_vc_getargs(xprt, xdr_args, args_ptr) 677 SVCXPRT *xprt; 678 xdrproc_t xdr_args; 679 caddr_t args_ptr; 680 { 681 682 _DIAGASSERT(xprt != NULL); 683 /* args_ptr may be NULL */ 684 685 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 686 args_ptr)); 687 } 688 689 static bool_t 690 svc_vc_freeargs(xprt, xdr_args, args_ptr) 691 SVCXPRT *xprt; 692 xdrproc_t xdr_args; 693 caddr_t args_ptr; 694 { 695 XDR *xdrs; 696 697 _DIAGASSERT(xprt != NULL); 698 /* args_ptr may be NULL */ 699 700 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 701 702 xdrs->x_op = XDR_FREE; 703 return ((*xdr_args)(xdrs, args_ptr)); 704 } 705 706 static bool_t 707 svc_vc_reply(xprt, msg) 708 SVCXPRT *xprt; 709 struct rpc_msg *msg; 710 { 711 struct cf_conn *cd; 712 XDR *xdrs; 713 bool_t rstat; 714 715 _DIAGASSERT(xprt != NULL); 716 _DIAGASSERT(msg != NULL); 717 718 cd = (struct cf_conn *)(xprt->xp_p1); 719 xdrs = &(cd->xdrs); 720 721 xdrs->x_op = XDR_ENCODE; 722 msg->rm_xid = cd->x_id; 723 rstat = xdr_replymsg(xdrs, msg); 724 (void)xdrrec_endofrecord(xdrs, TRUE); 725 return (rstat); 726 } 727 728 static void 729 svc_vc_ops(xprt) 730 SVCXPRT *xprt; 731 { 732 static struct xp_ops ops; 733 static struct xp_ops2 ops2; 734 #ifdef _REENTRANT 735 extern mutex_t ops_lock; 736 #endif 737 738 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 739 740 mutex_lock(&ops_lock); 741 if (ops.xp_recv == NULL) { 742 ops.xp_recv = svc_vc_recv; 743 ops.xp_stat = svc_vc_stat; 744 ops.xp_getargs = svc_vc_getargs; 745 ops.xp_reply = svc_vc_reply; 746 ops.xp_freeargs = svc_vc_freeargs; 747 ops.xp_destroy = svc_vc_destroy; 748 ops2.xp_control = svc_vc_control; 749 } 750 xprt->xp_ops = &ops; 751 xprt->xp_ops2 = &ops2; 752 mutex_unlock(&ops_lock); 753 } 754 755 static void 756 svc_vc_rendezvous_ops(xprt) 757 SVCXPRT *xprt; 758 { 759 static struct xp_ops ops; 760 static struct xp_ops2 ops2; 761 #ifdef _REENTRANT 762 extern mutex_t ops_lock; 763 #endif 764 /* XXXGCC vax compiler unhappy otherwise */ 765 #ifdef __vax__ 766 extern void abort(void); 767 #endif 768 769 mutex_lock(&ops_lock); 770 if (ops.xp_recv == NULL) { 771 ops.xp_recv = rendezvous_request; 772 ops.xp_stat = rendezvous_stat; 773 ops.xp_getargs = 774 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 775 ops.xp_reply = 776 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort; 777 ops.xp_freeargs = 778 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 779 ops.xp_destroy = svc_vc_destroy; 780 ops2.xp_control = svc_vc_rendezvous_control; 781 } 782 xprt->xp_ops = &ops; 783 xprt->xp_ops2 = &ops2; 784 mutex_unlock(&ops_lock); 785 } 786 787 /* 788 * Destroy xprts that have not have had any activity in 'timeout' seconds. 789 * If 'cleanblock' is true, blocking connections (the default) are also 790 * cleaned. If timeout is 0, the least active connection is picked. 791 */ 792 bool_t 793 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 794 { 795 int i, ncleaned; 796 SVCXPRT *xprt, *least_active; 797 struct timeval tv, tdiff, tmax; 798 struct cf_conn *cd; 799 800 gettimeofday(&tv, NULL); 801 tmax.tv_sec = tmax.tv_usec = 0; 802 least_active = NULL; 803 rwlock_wrlock(&svc_fd_lock); 804 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 805 if (FD_ISSET(i, fds)) { 806 xprt = __svc_xports[i]; 807 if (xprt == NULL || xprt->xp_ops == NULL || 808 xprt->xp_ops->xp_recv != svc_vc_recv) 809 continue; 810 cd = (struct cf_conn *)xprt->xp_p1; 811 if (!cleanblock && !cd->nonblock) 812 continue; 813 if (timeout == 0) { 814 timersub(&tv, &cd->last_recv_time, &tdiff); 815 if (timercmp(&tdiff, &tmax, >)) { 816 tmax = tdiff; 817 least_active = xprt; 818 } 819 continue; 820 } 821 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 822 __xprt_unregister_unlocked(xprt); 823 __svc_vc_dodestroy(xprt); 824 ncleaned++; 825 } 826 } 827 } 828 if (timeout == 0 && least_active != NULL) { 829 __xprt_unregister_unlocked(least_active); 830 __svc_vc_dodestroy(least_active); 831 ncleaned++; 832 } 833 rwlock_unlock(&svc_fd_lock); 834 return ncleaned > 0 ? TRUE : FALSE; 835 } 836
Indexes created Thu Oct 02 14:10:14 GMT 2025