svc_vc.c revision 1.16
1 /* $NetBSD: svc_vc.c,v 1.16 2006/03/22 00:00:16 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 1.16 2006/03/22 00:00:16 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 #include <netinet/tcp.h> 60 61 #include <assert.h> 62 #include <err.h> 63 #include <errno.h> 64 #include <fcntl.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 70 #include <rpc/rpc.h> 71 72 #include "rpc_internal.h" 73 74 #ifdef __weak_alias 75 __weak_alias(svc_fd_create,_svc_fd_create) 76 __weak_alias(svc_vc_create,_svc_vc_create) 77 #endif 78 79 #ifdef _REENTRANT 80 extern rwlock_t svc_fd_lock; 81 #endif 82 83 static SVCXPRT *makefd_xprt __P((int, u_int, u_int)); 84 static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *)); 85 static enum xprt_stat rendezvous_stat __P((SVCXPRT *)); 86 static void svc_vc_destroy __P((SVCXPRT *)); 87 static void __svc_vc_dodestroy __P((SVCXPRT *)); 88 static int read_vc __P((caddr_t, caddr_t, int)); 89 static int write_vc __P((caddr_t, caddr_t, int)); 90 static enum xprt_stat svc_vc_stat __P((SVCXPRT *)); 91 static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *)); 92 static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t)); 93 static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t)); 94 static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *)); 95 static void svc_vc_rendezvous_ops __P((SVCXPRT *)); 96 static void svc_vc_ops __P((SVCXPRT *)); 97 static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in)); 98 static bool_t svc_vc_rendezvous_control __P((SVCXPRT *xprt, const u_int rq, 99 void *in)); 100 101 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 102 u_int sendsize; 103 u_int recvsize; 104 int maxrec; 105 }; 106 107 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 108 enum xprt_stat strm_stat; 109 u_int32_t x_id; 110 XDR xdrs; 111 char verf_body[MAX_AUTH_BYTES]; 112 u_int sendsize; 113 u_int recvsize; 114 int maxrec; 115 bool_t nonblock; 116 struct timeval last_recv_time; 117 }; 118 119 /* 120 * Usage: 121 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 122 * 123 * Creates, registers, and returns a (rpc) tcp based transporter. 124 * Once *xprt is initialized, it is registered as a transporter 125 * see (svc.h, xprt_register). This routine returns 126 * a NULL if a problem occurred. 127 * 128 * The filedescriptor passed in is expected to refer to a bound, but 129 * not yet connected socket. 130 * 131 * Since streams do buffered io similar to stdio, the caller can specify 132 * how big the send and receive buffers are via the second and third parms; 133 * 0 => use the system default. 134 */ 135 SVCXPRT * 136 svc_vc_create(fd, sendsize, recvsize) 137 int fd; 138 u_int sendsize; 139 u_int recvsize; 140 { 141 SVCXPRT *xprt; 142 struct cf_rendezvous *r = NULL; 143 struct __rpc_sockinfo si; 144 struct sockaddr_storage sslocal; 145 socklen_t slen; 146 int one = 1; 147 148 r = mem_alloc(sizeof(*r)); 149 if (r == NULL) { 150 warnx("svc_vc_create: out of memory"); 151 goto cleanup_svc_vc_create; 152 } 153 if (!__rpc_fd2sockinfo(fd, &si)) 154 return NULL; 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) && si.si_proto == IPPROTO_TCP) { 359 len = 1; 360 /* XXX fvdl - is this useful? */ 361 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 362 } 363 364 cd = (struct cf_conn *)newxprt->xp_p1; 365 366 cd->recvsize = r->recvsize; 367 cd->sendsize = r->sendsize; 368 cd->maxrec = r->maxrec; 369 370 if (cd->maxrec != 0) { 371 flags = fcntl(sock, F_GETFL, 0); 372 if (flags == -1) 373 return (FALSE); 374 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 375 return (FALSE); 376 if (cd->recvsize > cd->maxrec) 377 cd->recvsize = cd->maxrec; 378 cd->nonblock = TRUE; 379 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 380 } else 381 cd->nonblock = FALSE; 382 383 gettimeofday(&cd->last_recv_time, NULL); 384 385 return (FALSE); /* there is never an rpc msg to be processed */ 386 } 387 388 /*ARGSUSED*/ 389 static enum xprt_stat 390 rendezvous_stat(xprt) 391 SVCXPRT *xprt; 392 { 393 394 return (XPRT_IDLE); 395 } 396 397 static void 398 svc_vc_destroy(xprt) 399 SVCXPRT *xprt; 400 { 401 _DIAGASSERT(xprt != NULL); 402 403 xprt_unregister(xprt); 404 __svc_vc_dodestroy(xprt); 405 } 406 407 static void 408 __svc_vc_dodestroy(xprt) 409 SVCXPRT *xprt; 410 { 411 struct cf_conn *cd; 412 struct cf_rendezvous *r; 413 414 cd = (struct cf_conn *)xprt->xp_p1; 415 416 if (xprt->xp_fd != RPC_ANYFD) 417 (void)close(xprt->xp_fd); 418 if (xprt->xp_port != 0) { 419 /* a rendezvouser socket */ 420 r = (struct cf_rendezvous *)xprt->xp_p1; 421 mem_free(r, sizeof (struct cf_rendezvous)); 422 xprt->xp_port = 0; 423 } else { 424 /* an actual connection socket */ 425 XDR_DESTROY(&(cd->xdrs)); 426 mem_free(cd, sizeof(struct cf_conn)); 427 } 428 if (xprt->xp_rtaddr.buf) 429 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 430 if (xprt->xp_ltaddr.buf) 431 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 432 if (xprt->xp_tp) 433 free(xprt->xp_tp); 434 if (xprt->xp_netid) 435 free(xprt->xp_netid); 436 mem_free(xprt, sizeof(SVCXPRT)); 437 } 438 439 /*ARGSUSED*/ 440 static bool_t 441 svc_vc_control(xprt, rq, in) 442 SVCXPRT *xprt; 443 const u_int rq; 444 void *in; 445 { 446 return (FALSE); 447 } 448 449 /*ARGSUSED*/ 450 static bool_t 451 svc_vc_rendezvous_control(xprt, rq, in) 452 SVCXPRT *xprt; 453 const u_int rq; 454 void *in; 455 { 456 struct cf_rendezvous *cfp; 457 458 cfp = (struct cf_rendezvous *)xprt->xp_p1; 459 if (cfp == NULL) 460 return (FALSE); 461 switch (rq) { 462 case SVCGET_CONNMAXREC: 463 *(int *)in = cfp->maxrec; 464 break; 465 case SVCSET_CONNMAXREC: 466 cfp->maxrec = *(int *)in; 467 break; 468 default: 469 return (FALSE); 470 } 471 return (TRUE); 472 } 473 474 /* 475 * reads data from the tcp connection. 476 * any error is fatal and the connection is closed. 477 * (And a read of zero bytes is a half closed stream => error.) 478 * All read operations timeout after 35 seconds. A timeout is 479 * fatal for the connection. 480 */ 481 static int 482 read_vc(xprtp, buf, len) 483 caddr_t xprtp; 484 caddr_t buf; 485 int len; 486 { 487 SVCXPRT *xprt; 488 int sock; 489 struct pollfd pollfd; 490 struct sockaddr *sa; 491 struct msghdr msg; 492 struct cmsghdr *cmp; 493 void *crmsg = NULL; 494 struct sockcred *sc; 495 socklen_t crmsgsize; 496 struct cf_conn *cfp; 497 static const struct timespec ts = { 35, 0 }; 498 499 xprt = (SVCXPRT *)(void *)xprtp; 500 _DIAGASSERT(xprt != NULL); 501 502 sock = xprt->xp_fd; 503 504 sa = (struct sockaddr *)xprt->xp_rtaddr.buf; 505 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) { 506 memset(&msg, 0, sizeof msg); 507 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS)); 508 crmsg = malloc(crmsgsize); 509 if (crmsg == NULL) 510 goto fatal_err; 511 memset(crmsg, 0, crmsgsize); 512 513 msg.msg_control = crmsg; 514 msg.msg_controllen = crmsgsize; 515 516 if (recvmsg(sock, &msg, 0) < 0) 517 goto fatal_err; 518 519 if (msg.msg_controllen == 0 || 520 (msg.msg_flags & MSG_CTRUNC) != 0) 521 goto fatal_err; 522 523 cmp = CMSG_FIRSTHDR(&msg); 524 if (cmp->cmsg_level != SOL_SOCKET || 525 cmp->cmsg_type != SCM_CREDS) 526 goto fatal_err; 527 528 sc = (struct sockcred *)(void *)CMSG_DATA(cmp); 529 530 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups)); 531 if (xprt->xp_p2 == NULL) 532 goto fatal_err; 533 534 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups)); 535 free(crmsg); 536 crmsg = NULL; 537 } 538 539 cfp = (struct cf_conn *)xprt->xp_p1; 540 541 if (cfp->nonblock) { 542 len = read(sock, buf, (size_t)len); 543 if (len < 0) { 544 if (errno == EAGAIN) 545 len = 0; 546 else 547 goto fatal_err; 548 } 549 if (len != 0) 550 gettimeofday(&cfp->last_recv_time, NULL); 551 return len; 552 } 553 554 do { 555 pollfd.fd = sock; 556 pollfd.events = POLLIN; 557 switch (pollts(&pollfd, 1, &ts, NULL)) { 558 case -1: 559 if (errno == EINTR) { 560 continue; 561 } 562 /*FALLTHROUGH*/ 563 case 0: 564 goto fatal_err; 565 566 default: 567 break; 568 } 569 } while ((pollfd.revents & POLLIN) == 0); 570 571 if ((len = read(sock, buf, (size_t)len)) > 0) { 572 gettimeofday(&cfp->last_recv_time, NULL); 573 return (len); 574 } 575 576 fatal_err: 577 if (crmsg != NULL) 578 free(crmsg); 579 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 580 return (-1); 581 } 582 583 /* 584 * writes data to the tcp connection. 585 * Any error is fatal and the connection is closed. 586 */ 587 static int 588 write_vc(xprtp, buf, len) 589 caddr_t xprtp; 590 caddr_t buf; 591 int len; 592 { 593 SVCXPRT *xprt; 594 int i, cnt; 595 struct cf_conn *cd; 596 struct timeval tv0, tv1; 597 598 xprt = (SVCXPRT *)(void *)xprtp; 599 _DIAGASSERT(xprt != NULL); 600 601 cd = (struct cf_conn *)xprt->xp_p1; 602 603 if (cd->nonblock) 604 gettimeofday(&tv0, NULL); 605 606 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 607 if ((i = write(xprt->xp_fd, buf, (size_t)cnt)) < 0) { 608 if (errno != EAGAIN || !cd->nonblock) { 609 cd->strm_stat = XPRT_DIED; 610 return (-1); 611 } 612 if (cd->nonblock && i != cnt) { 613 /* 614 * For non-blocking connections, do not 615 * take more than 2 seconds writing the 616 * data out. 617 * 618 * XXX 2 is an arbitrary amount. 619 */ 620 gettimeofday(&tv1, NULL); 621 if (tv1.tv_sec - tv0.tv_sec >= 2) { 622 cd->strm_stat = XPRT_DIED; 623 return (-1); 624 } 625 } 626 } 627 } 628 return (len); 629 } 630 631 static enum xprt_stat 632 svc_vc_stat(xprt) 633 SVCXPRT *xprt; 634 { 635 struct cf_conn *cd; 636 637 _DIAGASSERT(xprt != NULL); 638 639 cd = (struct cf_conn *)(xprt->xp_p1); 640 641 if (cd->strm_stat == XPRT_DIED) 642 return (XPRT_DIED); 643 if (! xdrrec_eof(&(cd->xdrs))) 644 return (XPRT_MOREREQS); 645 return (XPRT_IDLE); 646 } 647 648 static bool_t 649 svc_vc_recv(xprt, msg) 650 SVCXPRT *xprt; 651 struct rpc_msg *msg; 652 { 653 struct cf_conn *cd; 654 XDR *xdrs; 655 656 _DIAGASSERT(xprt != NULL); 657 _DIAGASSERT(msg != NULL); 658 659 cd = (struct cf_conn *)(xprt->xp_p1); 660 xdrs = &(cd->xdrs); 661 662 if (cd->nonblock) { 663 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 664 return FALSE; 665 } 666 667 xdrs->x_op = XDR_DECODE; 668 (void)xdrrec_skiprecord(xdrs); 669 670 if (xdr_callmsg(xdrs, msg)) { 671 cd->x_id = msg->rm_xid; 672 return (TRUE); 673 } 674 cd->strm_stat = XPRT_DIED; 675 return (FALSE); 676 } 677 678 static bool_t 679 svc_vc_getargs(xprt, xdr_args, args_ptr) 680 SVCXPRT *xprt; 681 xdrproc_t xdr_args; 682 caddr_t args_ptr; 683 { 684 685 _DIAGASSERT(xprt != NULL); 686 /* args_ptr may be NULL */ 687 688 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 689 args_ptr)); 690 } 691 692 static bool_t 693 svc_vc_freeargs(xprt, xdr_args, args_ptr) 694 SVCXPRT *xprt; 695 xdrproc_t xdr_args; 696 caddr_t args_ptr; 697 { 698 XDR *xdrs; 699 700 _DIAGASSERT(xprt != NULL); 701 /* args_ptr may be NULL */ 702 703 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 704 705 xdrs->x_op = XDR_FREE; 706 return ((*xdr_args)(xdrs, args_ptr)); 707 } 708 709 static bool_t 710 svc_vc_reply(xprt, msg) 711 SVCXPRT *xprt; 712 struct rpc_msg *msg; 713 { 714 struct cf_conn *cd; 715 XDR *xdrs; 716 bool_t rstat; 717 718 _DIAGASSERT(xprt != NULL); 719 _DIAGASSERT(msg != NULL); 720 721 cd = (struct cf_conn *)(xprt->xp_p1); 722 xdrs = &(cd->xdrs); 723 724 xdrs->x_op = XDR_ENCODE; 725 msg->rm_xid = cd->x_id; 726 rstat = xdr_replymsg(xdrs, msg); 727 (void)xdrrec_endofrecord(xdrs, TRUE); 728 return (rstat); 729 } 730 731 static void 732 svc_vc_ops(xprt) 733 SVCXPRT *xprt; 734 { 735 static struct xp_ops ops; 736 static struct xp_ops2 ops2; 737 #ifdef _REENTRANT 738 extern mutex_t ops_lock; 739 #endif 740 741 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 742 743 mutex_lock(&ops_lock); 744 if (ops.xp_recv == NULL) { 745 ops.xp_recv = svc_vc_recv; 746 ops.xp_stat = svc_vc_stat; 747 ops.xp_getargs = svc_vc_getargs; 748 ops.xp_reply = svc_vc_reply; 749 ops.xp_freeargs = svc_vc_freeargs; 750 ops.xp_destroy = svc_vc_destroy; 751 ops2.xp_control = svc_vc_control; 752 } 753 xprt->xp_ops = &ops; 754 xprt->xp_ops2 = &ops2; 755 mutex_unlock(&ops_lock); 756 } 757 758 static void 759 svc_vc_rendezvous_ops(xprt) 760 SVCXPRT *xprt; 761 { 762 static struct xp_ops ops; 763 static struct xp_ops2 ops2; 764 #ifdef _REENTRANT 765 extern mutex_t ops_lock; 766 #endif 767 /* XXXGCC vax compiler unhappy otherwise */ 768 #ifdef __vax__ 769 extern void abort(void); 770 #endif 771 772 mutex_lock(&ops_lock); 773 if (ops.xp_recv == NULL) { 774 ops.xp_recv = rendezvous_request; 775 ops.xp_stat = rendezvous_stat; 776 ops.xp_getargs = 777 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 778 ops.xp_reply = 779 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort; 780 ops.xp_freeargs = 781 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 782 ops.xp_destroy = svc_vc_destroy; 783 ops2.xp_control = svc_vc_rendezvous_control; 784 } 785 xprt->xp_ops = &ops; 786 xprt->xp_ops2 = &ops2; 787 mutex_unlock(&ops_lock); 788 } 789 790 /* 791 * Destroy xprts that have not have had any activity in 'timeout' seconds. 792 * If 'cleanblock' is true, blocking connections (the default) are also 793 * cleaned. If timeout is 0, the least active connection is picked. 794 */ 795 bool_t 796 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 797 { 798 int i, ncleaned; 799 SVCXPRT *xprt, *least_active; 800 struct timeval tv, tdiff, tmax; 801 struct cf_conn *cd; 802 803 gettimeofday(&tv, NULL); 804 tmax.tv_sec = tmax.tv_usec = 0; 805 least_active = NULL; 806 rwlock_wrlock(&svc_fd_lock); 807 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 808 if (FD_ISSET(i, fds)) { 809 xprt = __svc_xports[i]; 810 if (xprt == NULL || xprt->xp_ops == NULL || 811 xprt->xp_ops->xp_recv != svc_vc_recv) 812 continue; 813 cd = (struct cf_conn *)xprt->xp_p1; 814 if (!cleanblock && !cd->nonblock) 815 continue; 816 if (timeout == 0) { 817 timersub(&tv, &cd->last_recv_time, &tdiff); 818 if (timercmp(&tdiff, &tmax, >)) { 819 tmax = tdiff; 820 least_active = xprt; 821 } 822 continue; 823 } 824 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 825 __xprt_unregister_unlocked(xprt); 826 __svc_vc_dodestroy(xprt); 827 ncleaned++; 828 } 829 } 830 } 831 if (timeout == 0 && least_active != NULL) { 832 __xprt_unregister_unlocked(least_active); 833 __svc_vc_dodestroy(least_active); 834 ncleaned++; 835 } 836 rwlock_unlock(&svc_fd_lock); 837 return ncleaned > 0 ? TRUE : FALSE; 838 } 839
Indexes created Thu Oct 02 14:10:14 GMT 2025