svc_vc.c revision 1.8.2.5
1 /* $NetBSD: svc_vc.c,v 1.8.2.5 2002/11/12 14:59:20 skrll 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 1.8.2.5 2002/11/12 14:59:20 skrll 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 (r != NULL) 198 mem_free(r, sizeof(*r)); 199 return (NULL); 200 } 201 202 /* 203 * Like svtcp_create(), except the routine takes any *open* UNIX file 204 * descriptor as its first input. 205 */ 206 SVCXPRT * 207 svc_fd_create(fd, sendsize, recvsize) 208 int fd; 209 u_int sendsize; 210 u_int recvsize; 211 { 212 struct sockaddr_storage ss; 213 socklen_t slen; 214 SVCXPRT *ret; 215 216 _DIAGASSERT(fd != -1); 217 218 ret = makefd_xprt(fd, sendsize, recvsize); 219 if (ret == NULL) 220 return NULL; 221 222 slen = sizeof (struct sockaddr_storage); 223 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 224 warnx("svc_fd_create: could not retrieve local addr"); 225 goto freedata; 226 } 227 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 228 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 229 if (ret->xp_ltaddr.buf == NULL) { 230 warnx("svc_fd_create: no mem for local addr"); 231 goto freedata; 232 } 233 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 234 235 slen = sizeof (struct sockaddr_storage); 236 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 237 warnx("svc_fd_create: could not retrieve remote addr"); 238 goto freedata; 239 } 240 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 241 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 242 if (ret->xp_rtaddr.buf == NULL) { 243 warnx("svc_fd_create: no mem for local addr"); 244 goto freedata; 245 } 246 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 247 #ifdef PORTMAP 248 if (ss.ss_family == AF_INET) { 249 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 250 ret->xp_addrlen = sizeof (struct sockaddr_in); 251 } 252 #endif 253 254 return ret; 255 256 freedata: 257 if (ret->xp_ltaddr.buf != NULL) 258 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 259 260 return NULL; 261 } 262 263 static SVCXPRT * 264 makefd_xprt(fd, sendsize, recvsize) 265 int fd; 266 u_int sendsize; 267 u_int recvsize; 268 { 269 SVCXPRT *xprt; 270 struct cf_conn *cd; 271 const char *netid; 272 struct __rpc_sockinfo si; 273 274 _DIAGASSERT(fd != -1); 275 276 xprt = mem_alloc(sizeof(SVCXPRT)); 277 if (xprt == NULL) { 278 warnx("svc_vc: makefd_xprt: out of memory"); 279 goto done; 280 } 281 memset(xprt, 0, sizeof *xprt); 282 cd = mem_alloc(sizeof(struct cf_conn)); 283 if (cd == NULL) { 284 warnx("svc_tcp: makefd_xprt: out of memory"); 285 mem_free(xprt, sizeof(SVCXPRT)); 286 xprt = NULL; 287 goto done; 288 } 289 cd->strm_stat = XPRT_IDLE; 290 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 291 (caddr_t)(void *)xprt, read_vc, write_vc); 292 xprt->xp_p1 = (caddr_t)(void *)cd; 293 xprt->xp_verf.oa_base = cd->verf_body; 294 svc_vc_ops(xprt); /* truely deals with calls */ 295 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 296 xprt->xp_fd = fd; 297 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 298 xprt->xp_netid = strdup(netid); 299 300 xprt_register(xprt); 301 done: 302 return (xprt); 303 } 304 305 /*ARGSUSED*/ 306 static bool_t 307 rendezvous_request(xprt, msg) 308 SVCXPRT *xprt; 309 struct rpc_msg *msg; 310 { 311 int sock, flags; 312 struct cf_rendezvous *r; 313 struct cf_conn *cd; 314 struct sockaddr_storage addr; 315 socklen_t len; 316 struct __rpc_sockinfo si; 317 SVCXPRT *newxprt; 318 fd_set cleanfds; 319 320 _DIAGASSERT(xprt != NULL); 321 _DIAGASSERT(msg != NULL); 322 323 r = (struct cf_rendezvous *)xprt->xp_p1; 324 again: 325 len = sizeof addr; 326 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 327 &len)) < 0) { 328 if (errno == EINTR) 329 goto again; 330 /* 331 * Clean out the most idle file descriptor when we're 332 * running out. 333 */ 334 if (errno == EMFILE || errno == ENFILE) { 335 cleanfds = svc_fdset; 336 __svc_clean_idle(&cleanfds, 0, FALSE); 337 goto again; 338 } 339 return (FALSE); 340 } 341 /* 342 * make a new transporter (re-uses xprt) 343 */ 344 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 345 newxprt->xp_rtaddr.buf = mem_alloc(len); 346 if (newxprt->xp_rtaddr.buf == NULL) 347 return (FALSE); 348 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 349 newxprt->xp_rtaddr.len = len; 350 #ifdef PORTMAP 351 if (addr.ss_family == AF_INET) { 352 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 353 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 354 } 355 #endif 356 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 357 len = 1; 358 /* XXX fvdl - is this useful? */ 359 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 360 } 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 return (FALSE); 372 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 373 return (FALSE); 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 gettimeofday(&cd->last_recv_time, NULL); 382 383 return (FALSE); /* there is never an rpc msg to be processed */ 384 } 385 386 /*ARGSUSED*/ 387 static enum xprt_stat 388 rendezvous_stat(xprt) 389 SVCXPRT *xprt; 390 { 391 392 return (XPRT_IDLE); 393 } 394 395 static void 396 svc_vc_destroy(xprt) 397 SVCXPRT *xprt; 398 { 399 _DIAGASSERT(xprt != NULL); 400 401 xprt_unregister(xprt); 402 __svc_vc_dodestroy(xprt); 403 } 404 405 static void 406 __svc_vc_dodestroy(xprt) 407 SVCXPRT *xprt; 408 { 409 struct cf_conn *cd; 410 struct cf_rendezvous *r; 411 412 cd = (struct cf_conn *)xprt->xp_p1; 413 414 if (xprt->xp_fd != RPC_ANYFD) 415 (void)close(xprt->xp_fd); 416 if (xprt->xp_port != 0) { 417 /* a rendezvouser socket */ 418 r = (struct cf_rendezvous *)xprt->xp_p1; 419 mem_free(r, sizeof (struct cf_rendezvous)); 420 xprt->xp_port = 0; 421 } else { 422 /* an actual connection socket */ 423 XDR_DESTROY(&(cd->xdrs)); 424 mem_free(cd, sizeof(struct cf_conn)); 425 } 426 if (xprt->xp_rtaddr.buf) 427 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 428 if (xprt->xp_ltaddr.buf) 429 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 430 if (xprt->xp_tp) 431 free(xprt->xp_tp); 432 if (xprt->xp_netid) 433 free(xprt->xp_netid); 434 mem_free(xprt, sizeof(SVCXPRT)); 435 } 436 437 /*ARGSUSED*/ 438 static bool_t 439 svc_vc_control(xprt, rq, in) 440 SVCXPRT *xprt; 441 const u_int rq; 442 void *in; 443 { 444 return (FALSE); 445 } 446 447 /*ARGSUSED*/ 448 static bool_t 449 svc_vc_rendezvous_control(xprt, rq, in) 450 SVCXPRT *xprt; 451 const u_int rq; 452 void *in; 453 { 454 struct cf_rendezvous *cfp; 455 456 cfp = (struct cf_rendezvous *)xprt->xp_p1; 457 if (cfp == NULL) 458 return (FALSE); 459 switch (rq) { 460 case SVCGET_CONNMAXREC: 461 *(int *)in = cfp->maxrec; 462 break; 463 case SVCSET_CONNMAXREC: 464 cfp->maxrec = *(int *)in; 465 break; 466 default: 467 return (FALSE); 468 } 469 return (TRUE); 470 } 471 472 /* 473 * reads data from the tcp connection. 474 * any error is fatal and the connection is closed. 475 * (And a read of zero bytes is a half closed stream => error.) 476 * All read operations timeout after 35 seconds. A timeout is 477 * fatal for the connection. 478 */ 479 static int 480 read_vc(xprtp, buf, len) 481 caddr_t xprtp; 482 caddr_t buf; 483 int len; 484 { 485 SVCXPRT *xprt; 486 int sock; 487 int milliseconds = 35 * 1000; 488 struct pollfd pollfd; 489 struct sockaddr *sa; 490 struct msghdr msg; 491 struct cmsghdr *cmp; 492 void *crmsg = NULL; 493 struct sockcred *sc; 494 socklen_t crmsgsize; 495 struct cf_conn *cfp; 496 497 xprt = (SVCXPRT *)(void *)xprtp; 498 _DIAGASSERT(xprt != NULL); 499 500 sock = xprt->xp_fd; 501 502 sa = (struct sockaddr *)xprt->xp_rtaddr.buf; 503 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) { 504 memset(&msg, 0, sizeof msg); 505 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS)); 506 crmsg = malloc(crmsgsize); 507 if (crmsg == NULL) 508 goto fatal_err; 509 memset(crmsg, 0, crmsgsize); 510 511 msg.msg_control = crmsg; 512 msg.msg_controllen = crmsgsize; 513 514 if (recvmsg(sock, &msg, 0) < 0) 515 goto fatal_err; 516 517 if (msg.msg_controllen == 0 || 518 (msg.msg_flags & MSG_CTRUNC) != 0) 519 goto fatal_err; 520 521 cmp = CMSG_FIRSTHDR(&msg); 522 if (cmp->cmsg_level != SOL_SOCKET || 523 cmp->cmsg_type != SCM_CREDS) 524 goto fatal_err; 525 526 sc = (struct sockcred *)(void *)CMSG_DATA(cmp); 527 528 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups)); 529 if (xprt->xp_p2 == NULL) 530 goto fatal_err; 531 532 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups)); 533 free(crmsg); 534 crmsg = NULL; 535 } 536 537 cfp = (struct cf_conn *)xprt->xp_p1; 538 539 if (cfp->nonblock) { 540 len = read(sock, buf, (size_t)len); 541 if (len < 0) { 542 if (errno == EAGAIN) 543 len = 0; 544 else 545 goto fatal_err; 546 } 547 if (len != 0) 548 gettimeofday(&cfp->last_recv_time, NULL); 549 return len; 550 } 551 552 do { 553 pollfd.fd = sock; 554 pollfd.events = POLLIN; 555 switch (poll(&pollfd, 1, milliseconds)) { 556 case -1: 557 if (errno == EINTR) { 558 continue; 559 } 560 /*FALLTHROUGH*/ 561 case 0: 562 goto fatal_err; 563 564 default: 565 break; 566 } 567 } while ((pollfd.revents & POLLIN) == 0); 568 569 if ((len = read(sock, buf, (size_t)len)) > 0) { 570 gettimeofday(&cfp->last_recv_time, NULL); 571 return (len); 572 } 573 574 fatal_err: 575 if (crmsg != NULL) 576 free(crmsg); 577 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 578 return (-1); 579 } 580 581 /* 582 * writes data to the tcp connection. 583 * Any error is fatal and the connection is closed. 584 */ 585 static int 586 write_vc(xprtp, buf, len) 587 caddr_t xprtp; 588 caddr_t buf; 589 int len; 590 { 591 SVCXPRT *xprt; 592 int i, cnt; 593 struct cf_conn *cd; 594 struct timeval tv0, tv1; 595 596 xprt = (SVCXPRT *)(void *)xprtp; 597 _DIAGASSERT(xprt != NULL); 598 599 cd = (struct cf_conn *)xprt->xp_p1; 600 601 if (cd->nonblock) 602 gettimeofday(&tv0, NULL); 603 604 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 605 if ((i = write(xprt->xp_fd, buf, (size_t)cnt)) < 0) { 606 if (errno != EAGAIN || !cd->nonblock) { 607 cd->strm_stat = XPRT_DIED; 608 return (-1); 609 } 610 if (cd->nonblock && i != cnt) { 611 /* 612 * For non-blocking connections, do not 613 * take more than 2 seconds writing the 614 * data out. 615 * 616 * XXX 2 is an arbitrary amount. 617 */ 618 gettimeofday(&tv1, NULL); 619 if (tv1.tv_sec - tv0.tv_sec >= 2) { 620 cd->strm_stat = XPRT_DIED; 621 return (-1); 622 } 623 } 624 } 625 } 626 return (len); 627 } 628 629 static enum xprt_stat 630 svc_vc_stat(xprt) 631 SVCXPRT *xprt; 632 { 633 struct cf_conn *cd; 634 635 _DIAGASSERT(xprt != NULL); 636 637 cd = (struct cf_conn *)(xprt->xp_p1); 638 639 if (cd->strm_stat == XPRT_DIED) 640 return (XPRT_DIED); 641 if (! xdrrec_eof(&(cd->xdrs))) 642 return (XPRT_MOREREQS); 643 return (XPRT_IDLE); 644 } 645 646 static bool_t 647 svc_vc_recv(xprt, msg) 648 SVCXPRT *xprt; 649 struct rpc_msg *msg; 650 { 651 struct cf_conn *cd; 652 XDR *xdrs; 653 654 _DIAGASSERT(xprt != NULL); 655 _DIAGASSERT(msg != NULL); 656 657 cd = (struct cf_conn *)(xprt->xp_p1); 658 xdrs = &(cd->xdrs); 659 660 if (cd->nonblock) { 661 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 662 return FALSE; 663 } 664 665 xdrs->x_op = XDR_DECODE; 666 (void)xdrrec_skiprecord(xdrs); 667 668 if (xdr_callmsg(xdrs, msg)) { 669 cd->x_id = msg->rm_xid; 670 return (TRUE); 671 } 672 cd->strm_stat = XPRT_DIED; 673 return (FALSE); 674 } 675 676 static bool_t 677 svc_vc_getargs(xprt, xdr_args, args_ptr) 678 SVCXPRT *xprt; 679 xdrproc_t xdr_args; 680 caddr_t args_ptr; 681 { 682 683 _DIAGASSERT(xprt != NULL); 684 /* args_ptr may be NULL */ 685 686 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 687 args_ptr)); 688 } 689 690 static bool_t 691 svc_vc_freeargs(xprt, xdr_args, args_ptr) 692 SVCXPRT *xprt; 693 xdrproc_t xdr_args; 694 caddr_t args_ptr; 695 { 696 XDR *xdrs; 697 698 _DIAGASSERT(xprt != NULL); 699 /* args_ptr may be NULL */ 700 701 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 702 703 xdrs->x_op = XDR_FREE; 704 return ((*xdr_args)(xdrs, args_ptr)); 705 } 706 707 static bool_t 708 svc_vc_reply(xprt, msg) 709 SVCXPRT *xprt; 710 struct rpc_msg *msg; 711 { 712 struct cf_conn *cd; 713 XDR *xdrs; 714 bool_t rstat; 715 716 _DIAGASSERT(xprt != NULL); 717 _DIAGASSERT(msg != NULL); 718 719 cd = (struct cf_conn *)(xprt->xp_p1); 720 xdrs = &(cd->xdrs); 721 722 xdrs->x_op = XDR_ENCODE; 723 msg->rm_xid = cd->x_id; 724 rstat = xdr_replymsg(xdrs, msg); 725 (void)xdrrec_endofrecord(xdrs, TRUE); 726 return (rstat); 727 } 728 729 static void 730 svc_vc_ops(xprt) 731 SVCXPRT *xprt; 732 { 733 static struct xp_ops ops; 734 static struct xp_ops2 ops2; 735 #ifdef _REENTRANT 736 extern mutex_t ops_lock; 737 #endif 738 739 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 740 741 mutex_lock(&ops_lock); 742 if (ops.xp_recv == NULL) { 743 ops.xp_recv = svc_vc_recv; 744 ops.xp_stat = svc_vc_stat; 745 ops.xp_getargs = svc_vc_getargs; 746 ops.xp_reply = svc_vc_reply; 747 ops.xp_freeargs = svc_vc_freeargs; 748 ops.xp_destroy = svc_vc_destroy; 749 ops2.xp_control = svc_vc_control; 750 } 751 xprt->xp_ops = &ops; 752 xprt->xp_ops2 = &ops2; 753 mutex_unlock(&ops_lock); 754 } 755 756 static void 757 svc_vc_rendezvous_ops(xprt) 758 SVCXPRT *xprt; 759 { 760 static struct xp_ops ops; 761 static struct xp_ops2 ops2; 762 #ifdef _REENTRANT 763 extern mutex_t ops_lock; 764 #endif 765 766 mutex_lock(&ops_lock); 767 if (ops.xp_recv == NULL) { 768 ops.xp_recv = rendezvous_request; 769 ops.xp_stat = rendezvous_stat; 770 ops.xp_getargs = 771 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 772 ops.xp_reply = 773 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort; 774 ops.xp_freeargs = 775 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort, 776 ops.xp_destroy = svc_vc_destroy; 777 ops2.xp_control = svc_vc_rendezvous_control; 778 } 779 xprt->xp_ops = &ops; 780 xprt->xp_ops2 = &ops2; 781 mutex_unlock(&ops_lock); 782 } 783 784 /* 785 * Destroy xprts that have not have had any activity in 'timeout' seconds. 786 * If 'cleanblock' is true, blocking connections (the default) are also 787 * cleaned. If timeout is 0, the least active connection is picked. 788 */ 789 bool_t 790 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 791 { 792 int i, ncleaned; 793 SVCXPRT *xprt, *least_active; 794 struct timeval tv, tdiff, tmax; 795 struct cf_conn *cd; 796 797 gettimeofday(&tv, NULL); 798 tmax.tv_sec = tmax.tv_usec = 0; 799 least_active = NULL; 800 rwlock_wrlock(&svc_fd_lock); 801 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 802 if (FD_ISSET(i, fds)) { 803 xprt = __svc_xports[i]; 804 if (xprt == NULL || xprt->xp_ops == NULL || 805 xprt->xp_ops->xp_recv != svc_vc_recv) 806 continue; 807 cd = (struct cf_conn *)xprt->xp_p1; 808 if (!cleanblock && !cd->nonblock) 809 continue; 810 if (timeout == 0) { 811 timersub(&tv, &cd->last_recv_time, &tdiff); 812 if (timercmp(&tdiff, &tmax, >)) { 813 tmax = tdiff; 814 least_active = xprt; 815 } 816 continue; 817 } 818 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 819 __xprt_unregister_unlocked(xprt); 820 __svc_vc_dodestroy(xprt); 821 ncleaned++; 822 } 823 } 824 } 825 if (timeout == 0 && least_active != NULL) { 826 __xprt_unregister_unlocked(least_active); 827 __svc_vc_dodestroy(least_active); 828 ncleaned++; 829 } 830 rwlock_unlock(&svc_fd_lock); 831 return ncleaned > 0 ? TRUE : FALSE; 832 } 833
Indexes created Thu Oct 02 14:10:14 GMT 2025