svc_vc.c revision 1.8.2.4
1 /* $NetBSD: svc_vc.c,v 1.8.2.4 2002/11/11 22:22:49 nathanw 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 1.8.2.4 2002/11/11 22:22:49 nathanw 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 #include "rpc_internal.h" 74 75 #ifdef __weak_alias 76 __weak_alias(svc_fd_create,_svc_fd_create) 77 __weak_alias(svc_vc_create,_svc_vc_create) 78 #endif 79 80 static SVCXPRT *makefd_xprt __P((int, u_int, u_int)); 81 static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *)); 82 static enum xprt_stat rendezvous_stat __P((SVCXPRT *)); 83 static void svc_vc_destroy __P((SVCXPRT *)); 84 static void __svc_vc_dodestroy __P((SVCXPRT *)); 85 static int read_vc __P((caddr_t, caddr_t, int)); 86 static int write_vc __P((caddr_t, caddr_t, int)); 87 static enum xprt_stat svc_vc_stat __P((SVCXPRT *)); 88 static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *)); 89 static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t)); 90 static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t)); 91 static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *)); 92 static void svc_vc_rendezvous_ops __P((SVCXPRT *)); 93 static void svc_vc_ops __P((SVCXPRT *)); 94 static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in)); 95 static bool_t svc_vc_rendezvous_control __P((SVCXPRT *xprt, const u_int rq, 96 void *in)); 97 98 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 99 u_int sendsize; 100 u_int recvsize; 101 int maxrec; 102 }; 103 104 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 105 enum xprt_stat strm_stat; 106 u_int32_t x_id; 107 XDR xdrs; 108 char verf_body[MAX_AUTH_BYTES]; 109 u_int sendsize; 110 u_int recvsize; 111 int maxrec; 112 bool_t nonblock; 113 struct timeval last_recv_time; 114 }; 115 116 /* 117 * Usage: 118 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 119 * 120 * Creates, registers, and returns a (rpc) tcp based transporter. 121 * Once *xprt is initialized, it is registered as a transporter 122 * see (svc.h, xprt_register). This routine returns 123 * a NULL if a problem occurred. 124 * 125 * The filedescriptor passed in is expected to refer to a bound, but 126 * not yet connected socket. 127 * 128 * Since streams do buffered io similar to stdio, the caller can specify 129 * how big the send and receive buffers are via the second and third parms; 130 * 0 => use the system default. 131 */ 132 SVCXPRT * 133 svc_vc_create(fd, sendsize, recvsize) 134 int fd; 135 u_int sendsize; 136 u_int recvsize; 137 { 138 SVCXPRT *xprt; 139 struct cf_rendezvous *r = NULL; 140 struct __rpc_sockinfo si; 141 struct sockaddr_storage sslocal; 142 socklen_t slen; 143 int one = 1; 144 145 r = mem_alloc(sizeof(*r)); 146 if (r == NULL) { 147 warnx("svc_vc_create: out of memory"); 148 goto cleanup_svc_vc_create; 149 } 150 if (!__rpc_fd2sockinfo(fd, &si)) 151 return NULL; 152 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 153 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 154 r->maxrec = __svc_maxrec; 155 xprt = mem_alloc(sizeof(SVCXPRT)); 156 if (xprt == NULL) { 157 warnx("svc_vc_create: out of memory"); 158 goto cleanup_svc_vc_create; 159 } 160 xprt->xp_tp = NULL; 161 xprt->xp_p1 = (caddr_t)(void *)r; 162 xprt->xp_p2 = NULL; 163 xprt->xp_p3 = NULL; 164 xprt->xp_verf = _null_auth; 165 svc_vc_rendezvous_ops(xprt); 166 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 167 xprt->xp_fd = fd; 168 169 slen = sizeof (struct sockaddr_storage); 170 if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 171 warnx("svc_vc_create: could not retrieve local addr"); 172 goto cleanup_svc_vc_create; 173 } 174 175 /* 176 * We want to be able to check credentials on local sockets. 177 */ 178 if (sslocal.ss_family == AF_LOCAL) 179 if (setsockopt(fd, 0, LOCAL_CREDS, &one, sizeof one) < 0) 180 goto cleanup_svc_vc_create; 181 182 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 183 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 184 if (xprt->xp_ltaddr.buf == NULL) { 185 warnx("svc_vc_create: no mem for local addr"); 186 goto cleanup_svc_vc_create; 187 } 188 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 189 190 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 191 xprt_register(xprt); 192 return (xprt); 193 cleanup_svc_vc_create: 194 if (r != NULL) 195 mem_free(r, sizeof(*r)); 196 return (NULL); 197 } 198 199 /* 200 * Like svtcp_create(), except the routine takes any *open* UNIX file 201 * descriptor as its first input. 202 */ 203 SVCXPRT * 204 svc_fd_create(fd, sendsize, recvsize) 205 int fd; 206 u_int sendsize; 207 u_int recvsize; 208 { 209 struct sockaddr_storage ss; 210 socklen_t slen; 211 SVCXPRT *ret; 212 213 _DIAGASSERT(fd != -1); 214 215 ret = makefd_xprt(fd, sendsize, recvsize); 216 if (ret == NULL) 217 return NULL; 218 219 slen = sizeof (struct sockaddr_storage); 220 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 221 warnx("svc_fd_create: could not retrieve local addr"); 222 goto freedata; 223 } 224 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 225 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 226 if (ret->xp_ltaddr.buf == NULL) { 227 warnx("svc_fd_create: no mem for local addr"); 228 goto freedata; 229 } 230 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 231 232 slen = sizeof (struct sockaddr_storage); 233 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 234 warnx("svc_fd_create: could not retrieve remote addr"); 235 goto freedata; 236 } 237 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 238 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 239 if (ret->xp_rtaddr.buf == NULL) { 240 warnx("svc_fd_create: no mem for local addr"); 241 goto freedata; 242 } 243 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 244 #ifdef PORTMAP 245 if (ss.ss_family == AF_INET) { 246 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 247 ret->xp_addrlen = sizeof (struct sockaddr_in); 248 } 249 #endif 250 251 return ret; 252 253 freedata: 254 if (ret->xp_ltaddr.buf != NULL) 255 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 256 257 return NULL; 258 } 259 260 static SVCXPRT * 261 makefd_xprt(fd, sendsize, recvsize) 262 int fd; 263 u_int sendsize; 264 u_int recvsize; 265 { 266 SVCXPRT *xprt; 267 struct cf_conn *cd; 268 const char *netid; 269 struct __rpc_sockinfo si; 270 271 _DIAGASSERT(fd != -1); 272 273 xprt = mem_alloc(sizeof(SVCXPRT)); 274 if (xprt == NULL) { 275 warnx("svc_vc: makefd_xprt: out of memory"); 276 goto done; 277 } 278 memset(xprt, 0, sizeof *xprt); 279 cd = mem_alloc(sizeof(struct cf_conn)); 280 if (cd == NULL) { 281 warnx("svc_tcp: makefd_xprt: out of memory"); 282 mem_free(xprt, sizeof(SVCXPRT)); 283 xprt = NULL; 284 goto done; 285 } 286 cd->strm_stat = XPRT_IDLE; 287 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 288 (caddr_t)(void *)xprt, read_vc, write_vc); 289 xprt->xp_p1 = (caddr_t)(void *)cd; 290 xprt->xp_verf.oa_base = cd->verf_body; 291 svc_vc_ops(xprt); /* truely deals with calls */ 292 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 293 xprt->xp_fd = fd; 294 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 295 xprt->xp_netid = strdup(netid); 296 297 xprt_register(xprt); 298 done: 299 return (xprt); 300 } 301 302 /*ARGSUSED*/ 303 static bool_t 304 rendezvous_request(xprt, msg) 305 SVCXPRT *xprt; 306 struct rpc_msg *msg; 307 { 308 int sock, flags; 309 struct cf_rendezvous *r; 310 struct cf_conn *cd; 311 struct sockaddr_storage addr; 312 socklen_t len; 313 struct __rpc_sockinfo si; 314 SVCXPRT *newxprt; 315 fd_set cleanfds; 316 317 _DIAGASSERT(xprt != NULL); 318 _DIAGASSERT(msg != NULL); 319 320 r = (struct cf_rendezvous *)xprt->xp_p1; 321 again: 322 len = sizeof addr; 323 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 324 &len)) < 0) { 325 if (errno == EINTR) 326 goto again; 327 /* 328 * Clean out the most idle file descriptor when we're 329 * running out. 330 */ 331 if (errno == EMFILE || errno == ENFILE) { 332 cleanfds = svc_fdset; 333 __svc_clean_idle(&cleanfds, 0, FALSE); 334 goto again; 335 } 336 return (FALSE); 337 } 338 /* 339 * make a new transporter (re-uses xprt) 340 */ 341 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 342 newxprt->xp_rtaddr.buf = mem_alloc(len); 343 if (newxprt->xp_rtaddr.buf == NULL) 344 return (FALSE); 345 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 346 newxprt->xp_rtaddr.len = len; 347 #ifdef PORTMAP 348 if (addr.ss_family == AF_INET) { 349 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 350 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 351 } 352 #endif 353 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 354 len = 1; 355 /* XXX fvdl - is this useful? */ 356 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 357 } 358 359 cd = (struct cf_conn *)newxprt->xp_p1; 360 361 cd->recvsize = r->recvsize; 362 cd->sendsize = r->sendsize; 363 cd->maxrec = r->maxrec; 364 365 if (cd->maxrec != 0) { 366 flags = fcntl(sock, F_GETFL, 0); 367 if (flags == -1) 368 return (FALSE); 369 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 370 return (FALSE); 371 if (cd->recvsize > cd->maxrec) 372 cd->recvsize = cd->maxrec; 373 cd->nonblock = TRUE; 374 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 375 } else 376 cd->nonblock = FALSE; 377 378 gettimeofday(&cd->last_recv_time, NULL); 379 380 return (FALSE); /* there is never an rpc msg to be processed */ 381 } 382 383 /*ARGSUSED*/ 384 static enum xprt_stat 385 rendezvous_stat(xprt) 386 SVCXPRT *xprt; 387 { 388 389 return (XPRT_IDLE); 390 } 391 392 static void 393 svc_vc_destroy(xprt) 394 SVCXPRT *xprt; 395 { 396 _DIAGASSERT(xprt != NULL); 397 398 xprt_unregister(xprt); 399 __svc_vc_dodestroy(xprt); 400 } 401 402 static void 403 __svc_vc_dodestroy(xprt) 404 SVCXPRT *xprt; 405 { 406 struct cf_conn *cd; 407 struct cf_rendezvous *r; 408 409 cd = (struct cf_conn *)xprt->xp_p1; 410 411 if (xprt->xp_fd != RPC_ANYFD) 412 (void)close(xprt->xp_fd); 413 if (xprt->xp_port != 0) { 414 /* a rendezvouser socket */ 415 r = (struct cf_rendezvous *)xprt->xp_p1; 416 mem_free(r, sizeof (struct cf_rendezvous)); 417 xprt->xp_port = 0; 418 } else { 419 /* an actual connection socket */ 420 XDR_DESTROY(&(cd->xdrs)); 421 mem_free(cd, sizeof(struct cf_conn)); 422 } 423 if (xprt->xp_rtaddr.buf) 424 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 425 if (xprt->xp_ltaddr.buf) 426 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 427 if (xprt->xp_tp) 428 free(xprt->xp_tp); 429 if (xprt->xp_netid) 430 free(xprt->xp_netid); 431 mem_free(xprt, sizeof(SVCXPRT)); 432 } 433 434 /*ARGSUSED*/ 435 static bool_t 436 svc_vc_control(xprt, rq, in) 437 SVCXPRT *xprt; 438 const u_int rq; 439 void *in; 440 { 441 return (FALSE); 442 } 443 444 /*ARGSUSED*/ 445 static bool_t 446 svc_vc_rendezvous_control(xprt, rq, in) 447 SVCXPRT *xprt; 448 const u_int rq; 449 void *in; 450 { 451 struct cf_rendezvous *cfp; 452 453 cfp = (struct cf_rendezvous *)xprt->xp_p1; 454 if (cfp == NULL) 455 return (FALSE); 456 switch (rq) { 457 case SVCGET_CONNMAXREC: 458 *(int *)in = cfp->maxrec; 459 break; 460 case SVCSET_CONNMAXREC: 461 cfp->maxrec = *(int *)in; 462 break; 463 default: 464 return (FALSE); 465 } 466 return (TRUE); 467 } 468 469 /* 470 * reads data from the tcp connection. 471 * any error is fatal and the connection is closed. 472 * (And a read of zero bytes is a half closed stream => error.) 473 * All read operations timeout after 35 seconds. A timeout is 474 * fatal for the connection. 475 */ 476 static int 477 read_vc(xprtp, buf, len) 478 caddr_t xprtp; 479 caddr_t buf; 480 int len; 481 { 482 SVCXPRT *xprt; 483 int sock; 484 int milliseconds = 35 * 1000; 485 struct pollfd pollfd; 486 struct sockaddr *sa; 487 struct msghdr msg; 488 struct cmsghdr *cmp; 489 void *crmsg = NULL; 490 struct sockcred *sc; 491 socklen_t crmsgsize; 492 struct cf_conn *cfp; 493 494 xprt = (SVCXPRT *)(void *)xprtp; 495 _DIAGASSERT(xprt != NULL); 496 497 sock = xprt->xp_fd; 498 499 sa = (struct sockaddr *)xprt->xp_rtaddr.buf; 500 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) { 501 memset(&msg, 0, sizeof msg); 502 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS)); 503 crmsg = malloc(crmsgsize); 504 if (crmsg == NULL) 505 goto fatal_err; 506 memset(crmsg, 0, crmsgsize); 507 508 msg.msg_control = crmsg; 509 msg.msg_controllen = crmsgsize; 510 511 if (recvmsg(sock, &msg, 0) < 0) 512 goto fatal_err; 513 514 if (msg.msg_controllen == 0 || 515 (msg.msg_flags & MSG_CTRUNC) != 0) 516 goto fatal_err; 517 518 cmp = CMSG_FIRSTHDR(&msg); 519 if (cmp->cmsg_level != SOL_SOCKET || 520 cmp->cmsg_type != SCM_CREDS) 521 goto fatal_err; 522 523 sc = (struct sockcred *)(void *)CMSG_DATA(cmp); 524 525 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups)); 526 if (xprt->xp_p2 == NULL) 527 goto fatal_err; 528 529 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups)); 530 free(crmsg); 531 crmsg = NULL; 532 } 533 534 cfp = (struct cf_conn *)xprt->xp_p1; 535 536 if (cfp->nonblock) { 537 len = read(sock, buf, (size_t)len); 538 if (len < 0) { 539 if (errno == EAGAIN) 540 len = 0; 541 else 542 goto fatal_err; 543 } 544 if (len != 0) 545 gettimeofday(&cfp->last_recv_time, NULL); 546 return len; 547 } 548 549 do { 550 pollfd.fd = sock; 551 pollfd.events = POLLIN; 552 switch (poll(&pollfd, 1, milliseconds)) { 553 case -1: 554 if (errno == EINTR) { 555 continue; 556 } 557 /*FALLTHROUGH*/ 558 case 0: 559 goto fatal_err; 560 561 default: 562 break; 563 } 564 } while ((pollfd.revents & POLLIN) == 0); 565 566 if ((len = read(sock, buf, (size_t)len)) > 0) { 567 gettimeofday(&cfp->last_recv_time, NULL); 568 return (len); 569 } 570 571 fatal_err: 572 if (crmsg != NULL) 573 free(crmsg); 574 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 575 return (-1); 576 } 577 578 /* 579 * writes data to the tcp connection. 580 * Any error is fatal and the connection is closed. 581 */ 582 static int 583 write_vc(xprtp, buf, len) 584 caddr_t xprtp; 585 caddr_t buf; 586 int len; 587 { 588 SVCXPRT *xprt; 589 int i, cnt; 590 struct cf_conn *cd; 591 struct timeval tv0, tv1; 592 593 xprt = (SVCXPRT *)(void *)xprtp; 594 _DIAGASSERT(xprt != NULL); 595 596 cd = (struct cf_conn *)xprt->xp_p1; 597 598 if (cd->nonblock) 599 gettimeofday(&tv0, NULL); 600 601 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 602 if ((i = write(xprt->xp_fd, buf, (size_t)cnt)) < 0) { 603 if (errno != EAGAIN || !cd->nonblock) { 604 cd->strm_stat = XPRT_DIED; 605 return (-1); 606 } 607 if (cd->nonblock && i != cnt) { 608 /* 609 * For non-blocking connections, do not 610 * take more than 2 seconds writing the 611 * data out. 612 * 613 * XXX 2 is an arbitrary amount. 614 */ 615 gettimeofday(&tv1, NULL); 616 if (tv1.tv_sec - tv0.tv_sec >= 2) { 617 cd->strm_stat = XPRT_DIED; 618 return (-1); 619 } 620 } 621 } 622 } 623 return (len); 624 } 625 626 static enum xprt_stat 627 svc_vc_stat(xprt) 628 SVCXPRT *xprt; 629 { 630 struct cf_conn *cd; 631 632 _DIAGASSERT(xprt != NULL); 633 634 cd = (struct cf_conn *)(xprt->xp_p1); 635 636 if (cd->strm_stat == XPRT_DIED) 637 return (XPRT_DIED); 638 if (! xdrrec_eof(&(cd->xdrs))) 639 return (XPRT_MOREREQS); 640 return (XPRT_IDLE); 641 } 642 643 static bool_t 644 svc_vc_recv(xprt, msg) 645 SVCXPRT *xprt; 646 struct rpc_msg *msg; 647 { 648 struct cf_conn *cd; 649 XDR *xdrs; 650 651 _DIAGASSERT(xprt != NULL); 652 _DIAGASSERT(msg != NULL); 653 654 cd = (struct cf_conn *)(xprt->xp_p1); 655 xdrs = &(cd->xdrs); 656 657 if (cd->nonblock) { 658 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 659 return FALSE; 660 } 661 662 xdrs->x_op = XDR_DECODE; 663 (void)xdrrec_skiprecord(xdrs); 664 665 if (xdr_callmsg(xdrs, msg)) { 666 cd->x_id = msg->rm_xid; 667 return (TRUE); 668 } 669 cd->strm_stat = XPRT_DIED; 670 return (FALSE); 671 } 672 673 static bool_t 674 svc_vc_getargs(xprt, xdr_args, args_ptr) 675 SVCXPRT *xprt; 676 xdrproc_t xdr_args; 677 caddr_t args_ptr; 678 { 679 680 _DIAGASSERT(xprt != NULL); 681 /* args_ptr may be NULL */ 682 683 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 684 args_ptr)); 685 } 686 687 static bool_t 688 svc_vc_freeargs(xprt, xdr_args, args_ptr) 689 SVCXPRT *xprt; 690 xdrproc_t xdr_args; 691 caddr_t args_ptr; 692 { 693 XDR *xdrs; 694 695 _DIAGASSERT(xprt != NULL); 696 /* args_ptr may be NULL */ 697 698 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 699 700 xdrs->x_op = XDR_FREE; 701 return ((*xdr_args)(xdrs, args_ptr)); 702 } 703 704 static bool_t 705 svc_vc_reply(xprt, msg) 706 SVCXPRT *xprt; 707 struct rpc_msg *msg; 708 { 709 struct cf_conn *cd; 710 XDR *xdrs; 711 bool_t rstat; 712 713 _DIAGASSERT(xprt != NULL); 714 _DIAGASSERT(msg != NULL); 715 716 cd = (struct cf_conn *)(xprt->xp_p1); 717 xdrs = &(cd->xdrs); 718 719 xdrs->x_op = XDR_ENCODE; 720 msg->rm_xid = cd->x_id; 721 rstat = xdr_replymsg(xdrs, msg); 722 (void)xdrrec_endofrecord(xdrs, TRUE); 723 return (rstat); 724 } 725 726 static void 727 svc_vc_ops(xprt) 728 SVCXPRT *xprt; 729 { 730 static struct xp_ops ops; 731 static struct xp_ops2 ops2; 732 #ifdef _REENTRANT 733 extern mutex_t ops_lock; 734 #endif 735 736 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 737 738 mutex_lock(&ops_lock); 739 if (ops.xp_recv == NULL) { 740 ops.xp_recv = svc_vc_recv; 741 ops.xp_stat = svc_vc_stat; 742 ops.xp_getargs = svc_vc_getargs; 743 ops.xp_reply = svc_vc_reply; 744 ops.xp_freeargs = svc_vc_freeargs; 745 ops.xp_destroy = svc_vc_destroy; 746 ops2.xp_control = svc_vc_control; 747 } 748 xprt->xp_ops = &ops; 749 xprt->xp_ops2 = &ops2; 750 mutex_unlock(&ops_lock); 751 } 752 753 static void 754 svc_vc_rendezvous_ops(xprt) 755 SVCXPRT *xprt; 756 { 757 static struct xp_ops ops; 758 static struct xp_ops2 ops2; 759 #ifdef _REENTRANT 760 extern mutex_t ops_lock; 761 #endif 762 763 mutex_lock(&ops_lock); 764 if (ops.xp_recv == NULL) { 765 ops.xp_recv = rendezvous_request; 766 ops.xp_stat = rendezvous_stat; 767 ops.xp_getargs = 768 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort; 769 ops.xp_reply = 770 (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort; 771 ops.xp_freeargs = 772 (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort, 773 ops.xp_destroy = svc_vc_destroy; 774 ops2.xp_control = svc_vc_rendezvous_control; 775 } 776 xprt->xp_ops = &ops; 777 xprt->xp_ops2 = &ops2; 778 mutex_unlock(&ops_lock); 779 } 780 781 /* 782 * Destroy xprts that have not have had any activity in 'timeout' seconds. 783 * If 'cleanblock' is true, blocking connections (the default) are also 784 * cleaned. If timeout is 0, the least active connection is picked. 785 */ 786 bool_t 787 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 788 { 789 int i, ncleaned; 790 SVCXPRT *xprt, *least_active; 791 struct timeval tv, tdiff, tmax; 792 struct cf_conn *cd; 793 794 gettimeofday(&tv, NULL); 795 tmax.tv_sec = tmax.tv_usec = 0; 796 least_active = NULL; 797 rwlock_wrlock(&svc_fd_lock); 798 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 799 if (FD_ISSET(i, fds)) { 800 xprt = __svc_xports[i]; 801 if (xprt == NULL || xprt->xp_ops == NULL || 802 xprt->xp_ops->xp_recv != svc_vc_recv) 803 continue; 804 cd = (struct cf_conn *)xprt->xp_p1; 805 if (!cleanblock && !cd->nonblock) 806 continue; 807 if (timeout == 0) { 808 timersub(&tv, &cd->last_recv_time, &tdiff); 809 if (timercmp(&tdiff, &tmax, >)) { 810 tmax = tdiff; 811 least_active = xprt; 812 } 813 continue; 814 } 815 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 816 __xprt_unregister_unlocked(xprt); 817 __svc_vc_dodestroy(xprt); 818 ncleaned++; 819 } 820 } 821 } 822 if (timeout == 0 && least_active != NULL) { 823 __xprt_unregister_unlocked(least_active); 824 __svc_vc_dodestroy(least_active); 825 ncleaned++; 826 } 827 rwlock_unlock(&svc_fd_lock); 828 return ncleaned > 0 ? TRUE : FALSE; 829 } 830
Indexes created Thu Oct 02 14:10:14 GMT 2025