svc_vc.c revision 1.29
1 /* $NetBSD: svc_vc.c,v 1.29 2013/03/05 19:55:23 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 1.29 2013/03/05 19:55:23 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 "svc_fdset.h" 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(int, u_int, u_int); 84 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 85 static enum xprt_stat rendezvous_stat(SVCXPRT *); 86 static void svc_vc_destroy(SVCXPRT *); 87 static void __svc_vc_dodestroy(SVCXPRT *); 88 static int read_vc(caddr_t, caddr_t, int); 89 static int write_vc(caddr_t, caddr_t, int); 90 static enum xprt_stat svc_vc_stat(SVCXPRT *); 91 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 92 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, caddr_t); 93 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, caddr_t); 94 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 95 static void svc_vc_rendezvous_ops(SVCXPRT *); 96 static void svc_vc_ops(SVCXPRT *); 97 static bool_t svc_vc_control(SVCXPRT *, const u_int, void *); 98 static bool_t svc_vc_rendezvous_control(SVCXPRT *, const u_int, 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(int fd, u_int sendsize, u_int recvsize) 136 { 137 SVCXPRT *xprt; 138 struct cf_rendezvous *r = NULL; 139 struct __rpc_sockinfo si; 140 struct sockaddr_storage sslocal; 141 socklen_t slen; 142 int one = 1; 143 144 if (!__rpc_fd2sockinfo(fd, &si)) 145 return NULL; 146 147 r = mem_alloc(sizeof(*r)); 148 if (r == NULL) { 149 warn("%s: out of memory", __func__); 150 return NULL; 151 } 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 warn("%s: out of memory", __func__); 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 warn("%s: could not retrieve local addr", __func__); 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, (socklen_t)sizeof one) 180 == -1) 181 goto cleanup_svc_vc_create; 182 183 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 184 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 185 if (xprt->xp_ltaddr.buf == NULL) { 186 warn("%s: out of memory", __func__); 187 goto cleanup_svc_vc_create; 188 } 189 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 190 191 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 192 if (!xprt_register(xprt)) 193 goto cleanup_svc_vc_create; 194 return xprt; 195 cleanup_svc_vc_create: 196 if (xprt) 197 mem_free(xprt, sizeof(*xprt)); 198 if (r != NULL) 199 mem_free(r, sizeof(*r)); 200 return NULL; 201 } 202 203 /* 204 * Like svtcp_create(), except the routine takes any *open* UNIX file 205 * descriptor as its first input. 206 */ 207 SVCXPRT * 208 svc_fd_create(int fd, u_int sendsize, u_int recvsize) 209 { 210 struct sockaddr_storage ss; 211 socklen_t slen; 212 SVCXPRT *ret; 213 214 _DIAGASSERT(fd != -1); 215 216 ret = makefd_xprt(fd, sendsize, recvsize); 217 if (ret == NULL) 218 return NULL; 219 220 slen = sizeof (struct sockaddr_storage); 221 if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 222 warn("%s: could not retrieve local addr", __func__); 223 goto freedata; 224 } 225 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 226 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 227 if (ret->xp_ltaddr.buf == NULL) { 228 warn("%s: out of memory", __func__); 229 goto freedata; 230 } 231 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 232 233 slen = sizeof (struct sockaddr_storage); 234 if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 235 warn("%s: could not retrieve remote addr", __func__); 236 goto freedata; 237 } 238 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 239 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 240 if (ret->xp_rtaddr.buf == NULL) { 241 warn("%s: out of memory", __func__); 242 goto freedata; 243 } 244 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 245 #ifdef PORTMAP 246 if (ss.ss_family == AF_INET) { 247 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 248 ret->xp_addrlen = sizeof (struct sockaddr_in); 249 } 250 #endif 251 252 return ret; 253 254 freedata: 255 if (ret->xp_ltaddr.buf != NULL) 256 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 257 258 return NULL; 259 } 260 261 static SVCXPRT * 262 makefd_xprt(int fd, u_int sendsize, u_int recvsize) 263 { 264 SVCXPRT *xprt; 265 struct cf_conn *cd; 266 const char *netid; 267 struct __rpc_sockinfo si; 268 269 _DIAGASSERT(fd != -1); 270 271 xprt = mem_alloc(sizeof(SVCXPRT)); 272 if (xprt == NULL) 273 goto outofmem; 274 memset(xprt, 0, sizeof *xprt); 275 cd = mem_alloc(sizeof(struct cf_conn)); 276 if (cd == NULL) 277 goto outofmem; 278 cd->strm_stat = XPRT_IDLE; 279 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 280 (caddr_t)(void *)xprt, read_vc, write_vc); 281 xprt->xp_p1 = (caddr_t)(void *)cd; 282 xprt->xp_verf.oa_base = cd->verf_body; 283 svc_vc_ops(xprt); /* truely deals with calls */ 284 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 285 xprt->xp_fd = fd; 286 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 287 if ((xprt->xp_netid = strdup(netid)) == NULL) 288 goto outofmem; 289 290 if (!xprt_register(xprt)) 291 goto out; 292 return xprt; 293 294 outofmem: 295 warn("svc_tcp: makefd_xprt"); 296 out: 297 if (xprt) 298 mem_free(xprt, sizeof(SVCXPRT)); 299 return NULL; 300 } 301 302 /*ARGSUSED*/ 303 static bool_t 304 rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg) 305 { 306 int sock, flags; 307 struct cf_rendezvous *r; 308 struct cf_conn *cd; 309 struct sockaddr_storage addr; 310 socklen_t len; 311 struct __rpc_sockinfo si; 312 SVCXPRT *newxprt; 313 fd_set cleanfds; 314 315 _DIAGASSERT(xprt != NULL); 316 _DIAGASSERT(msg != NULL); 317 318 r = (struct cf_rendezvous *)xprt->xp_p1; 319 again: 320 len = sizeof addr; 321 if ((sock = accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 322 &len)) < 0) { 323 if (errno == EINTR) 324 goto again; 325 /* 326 * Clean out the most idle file descriptor when we're 327 * running out. 328 */ 329 if (errno == EMFILE || errno == ENFILE) { 330 cleanfds = *get_fdset(); 331 if (__svc_clean_idle(&cleanfds, 0, FALSE)) 332 goto again; 333 } 334 return FALSE; 335 } 336 /* 337 * make a new transporter (re-uses xprt) 338 */ 339 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 340 if (newxprt == NULL) 341 goto out; 342 newxprt->xp_rtaddr.buf = mem_alloc(len); 343 if (newxprt->xp_rtaddr.buf == NULL) 344 goto out; 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)) 354 __rpc_setnodelay(sock, &si); 355 356 cd = (struct cf_conn *)newxprt->xp_p1; 357 358 cd->recvsize = r->recvsize; 359 cd->sendsize = r->sendsize; 360 cd->maxrec = r->maxrec; 361 362 if (cd->maxrec != 0) { 363 flags = fcntl(sock, F_GETFL, 0); 364 if (flags == -1) 365 goto out; 366 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 367 goto out; 368 if (cd->recvsize > (u_int)cd->maxrec) 369 cd->recvsize = cd->maxrec; 370 cd->nonblock = TRUE; 371 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 372 } else 373 cd->nonblock = FALSE; 374 375 (void)gettimeofday(&cd->last_recv_time, NULL); 376 377 return FALSE; /* there is never an rpc msg to be processed */ 378 out: 379 (void)close(sock); 380 return FALSE; /* there was an error */ 381 } 382 383 /*ARGSUSED*/ 384 static enum xprt_stat 385 rendezvous_stat(SVCXPRT *xprt) 386 { 387 388 return XPRT_IDLE; 389 } 390 391 static void 392 svc_vc_destroy(SVCXPRT *xprt) 393 { 394 _DIAGASSERT(xprt != NULL); 395 396 xprt_unregister(xprt); 397 __svc_vc_dodestroy(xprt); 398 } 399 400 static void 401 __svc_vc_dodestroy(SVCXPRT *xprt) 402 { 403 struct cf_conn *cd; 404 struct cf_rendezvous *r; 405 406 cd = (struct cf_conn *)xprt->xp_p1; 407 408 if (xprt->xp_fd != RPC_ANYFD) 409 (void)close(xprt->xp_fd); 410 if (xprt->xp_port != 0) { 411 /* a rendezvouser socket */ 412 r = (struct cf_rendezvous *)xprt->xp_p1; 413 mem_free(r, sizeof (struct cf_rendezvous)); 414 xprt->xp_port = 0; 415 } else { 416 /* an actual connection socket */ 417 XDR_DESTROY(&(cd->xdrs)); 418 mem_free(cd, sizeof(struct cf_conn)); 419 } 420 if (xprt->xp_rtaddr.buf) 421 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 422 if (xprt->xp_ltaddr.buf) 423 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 424 if (xprt->xp_tp) 425 free(xprt->xp_tp); 426 if (xprt->xp_netid) 427 free(xprt->xp_netid); 428 mem_free(xprt, sizeof(SVCXPRT)); 429 } 430 431 /*ARGSUSED*/ 432 static bool_t 433 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 434 { 435 return FALSE; 436 } 437 438 /*ARGSUSED*/ 439 static bool_t 440 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 441 { 442 struct cf_rendezvous *cfp; 443 444 cfp = (struct cf_rendezvous *)xprt->xp_p1; 445 if (cfp == NULL) 446 return FALSE; 447 switch (rq) { 448 case SVCGET_CONNMAXREC: 449 *(int *)in = cfp->maxrec; 450 break; 451 case SVCSET_CONNMAXREC: 452 cfp->maxrec = *(int *)in; 453 break; 454 default: 455 return FALSE; 456 } 457 return TRUE; 458 } 459 460 /* 461 * reads data from the tcp connection. 462 * any error is fatal and the connection is closed. 463 * (And a read of zero bytes is a half closed stream => error.) 464 * All read operations timeout after 35 seconds. A timeout is 465 * fatal for the connection. 466 */ 467 static int 468 read_vc(caddr_t xprtp, caddr_t buf, int len) 469 { 470 SVCXPRT *xprt; 471 int sock; 472 struct pollfd pollfd; 473 struct sockaddr *sa; 474 struct msghdr msg; 475 struct cmsghdr *cmp; 476 void *crmsg = NULL; 477 struct sockcred *sc; 478 socklen_t crmsgsize; 479 struct cf_conn *cfp; 480 static const struct timespec ts = { 35, 0 }; 481 482 xprt = (SVCXPRT *)(void *)xprtp; 483 _DIAGASSERT(xprt != NULL); 484 485 sock = xprt->xp_fd; 486 487 sa = (struct sockaddr *)xprt->xp_rtaddr.buf; 488 if (sa->sa_family == AF_LOCAL && xprt->xp_p2 == NULL) { 489 memset(&msg, 0, sizeof msg); 490 crmsgsize = CMSG_SPACE(SOCKCREDSIZE(NGROUPS)); 491 crmsg = malloc(crmsgsize); 492 if (crmsg == NULL) 493 goto fatal_err; 494 memset(crmsg, 0, crmsgsize); 495 496 msg.msg_control = crmsg; 497 msg.msg_controllen = crmsgsize; 498 499 if (recvmsg(sock, &msg, 0) < 0) 500 goto fatal_err; 501 502 if (msg.msg_controllen == 0 || 503 (msg.msg_flags & MSG_CTRUNC) != 0) 504 goto fatal_err; 505 506 cmp = CMSG_FIRSTHDR(&msg); 507 if (cmp->cmsg_level != SOL_SOCKET || 508 cmp->cmsg_type != SCM_CREDS) 509 goto fatal_err; 510 511 sc = (struct sockcred *)(void *)CMSG_DATA(cmp); 512 513 xprt->xp_p2 = mem_alloc(SOCKCREDSIZE(sc->sc_ngroups)); 514 if (xprt->xp_p2 == NULL) 515 goto fatal_err; 516 517 memcpy(xprt->xp_p2, sc, SOCKCREDSIZE(sc->sc_ngroups)); 518 free(crmsg); 519 crmsg = NULL; 520 } 521 522 cfp = (struct cf_conn *)xprt->xp_p1; 523 524 if (cfp->nonblock) { 525 len = (int)read(sock, buf, (size_t)len); 526 if (len < 0) { 527 if (errno == EAGAIN) 528 len = 0; 529 else 530 goto fatal_err; 531 } 532 if (len != 0) 533 gettimeofday(&cfp->last_recv_time, NULL); 534 return len; 535 } 536 537 do { 538 pollfd.fd = sock; 539 pollfd.events = POLLIN; 540 switch (pollts(&pollfd, 1, &ts, NULL)) { 541 case -1: 542 if (errno == EINTR) { 543 continue; 544 } 545 /*FALLTHROUGH*/ 546 case 0: 547 goto fatal_err; 548 549 default: 550 break; 551 } 552 } while ((pollfd.revents & POLLIN) == 0); 553 554 if ((len = (int)read(sock, buf, (size_t)len)) > 0) { 555 gettimeofday(&cfp->last_recv_time, NULL); 556 return len; 557 } 558 559 fatal_err: 560 if (crmsg != NULL) 561 free(crmsg); 562 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 563 return -1; 564 } 565 566 /* 567 * writes data to the tcp connection. 568 * Any error is fatal and the connection is closed. 569 */ 570 static int 571 write_vc(caddr_t xprtp, caddr_t buf, int len) 572 { 573 SVCXPRT *xprt; 574 int i, cnt; 575 struct cf_conn *cd; 576 struct timeval tv0, tv1; 577 578 xprt = (SVCXPRT *)(void *)xprtp; 579 _DIAGASSERT(xprt != NULL); 580 581 cd = (struct cf_conn *)xprt->xp_p1; 582 583 if (cd->nonblock) 584 gettimeofday(&tv0, NULL); 585 586 for (cnt = len; cnt > 0; cnt -= i, buf += i) { 587 if ((i = (int)write(xprt->xp_fd, buf, (size_t)cnt)) < 0) { 588 if (errno != EAGAIN || !cd->nonblock) { 589 cd->strm_stat = XPRT_DIED; 590 return -1; 591 } 592 if (cd->nonblock) { 593 /* 594 * For non-blocking connections, do not 595 * take more than 2 seconds writing the 596 * data out. 597 * 598 * XXX 2 is an arbitrary amount. 599 */ 600 gettimeofday(&tv1, NULL); 601 if (tv1.tv_sec - tv0.tv_sec >= 2) { 602 cd->strm_stat = XPRT_DIED; 603 return -1; 604 } 605 } 606 i = 0; 607 } 608 } 609 return len; 610 } 611 612 static enum xprt_stat 613 svc_vc_stat(SVCXPRT *xprt) 614 { 615 struct cf_conn *cd; 616 617 _DIAGASSERT(xprt != NULL); 618 619 cd = (struct cf_conn *)(xprt->xp_p1); 620 621 if (cd->strm_stat == XPRT_DIED) 622 return XPRT_DIED; 623 if (! xdrrec_eof(&(cd->xdrs))) 624 return XPRT_MOREREQS; 625 return XPRT_IDLE; 626 } 627 628 static bool_t 629 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 630 { 631 struct cf_conn *cd; 632 XDR *xdrs; 633 634 _DIAGASSERT(xprt != NULL); 635 _DIAGASSERT(msg != NULL); 636 637 cd = (struct cf_conn *)(xprt->xp_p1); 638 xdrs = &(cd->xdrs); 639 640 if (cd->nonblock) { 641 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 642 return FALSE; 643 } 644 645 xdrs->x_op = XDR_DECODE; 646 (void)xdrrec_skiprecord(xdrs); 647 648 if (xdr_callmsg(xdrs, msg)) { 649 cd->x_id = msg->rm_xid; 650 return TRUE; 651 } 652 cd->strm_stat = XPRT_DIED; 653 return FALSE; 654 } 655 656 static bool_t 657 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr) 658 { 659 660 _DIAGASSERT(xprt != NULL); 661 /* args_ptr may be NULL */ 662 663 return (*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 664 args_ptr); 665 } 666 667 static bool_t 668 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr) 669 { 670 XDR *xdrs; 671 672 _DIAGASSERT(xprt != NULL); 673 /* args_ptr may be NULL */ 674 675 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 676 677 xdrs->x_op = XDR_FREE; 678 return (*xdr_args)(xdrs, args_ptr); 679 } 680 681 static bool_t 682 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 683 { 684 struct cf_conn *cd; 685 XDR *xdrs; 686 bool_t rstat; 687 688 _DIAGASSERT(xprt != NULL); 689 _DIAGASSERT(msg != NULL); 690 691 cd = (struct cf_conn *)(xprt->xp_p1); 692 xdrs = &(cd->xdrs); 693 694 xdrs->x_op = XDR_ENCODE; 695 msg->rm_xid = cd->x_id; 696 rstat = xdr_replymsg(xdrs, msg); 697 (void)xdrrec_endofrecord(xdrs, TRUE); 698 return rstat; 699 } 700 701 static void 702 svc_vc_ops(SVCXPRT *xprt) 703 { 704 static struct xp_ops ops; 705 static struct xp_ops2 ops2; 706 #ifdef _REENTRANT 707 extern mutex_t ops_lock; 708 #endif 709 710 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 711 712 mutex_lock(&ops_lock); 713 if (ops.xp_recv == NULL) { 714 ops.xp_recv = svc_vc_recv; 715 ops.xp_stat = svc_vc_stat; 716 ops.xp_getargs = svc_vc_getargs; 717 ops.xp_reply = svc_vc_reply; 718 ops.xp_freeargs = svc_vc_freeargs; 719 ops.xp_destroy = svc_vc_destroy; 720 ops2.xp_control = svc_vc_control; 721 } 722 xprt->xp_ops = &ops; 723 xprt->xp_ops2 = &ops2; 724 mutex_unlock(&ops_lock); 725 } 726 727 static void 728 svc_vc_rendezvous_ops(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 mutex_lock(&ops_lock); 736 if (ops.xp_recv == NULL) { 737 ops.xp_recv = rendezvous_request; 738 ops.xp_stat = rendezvous_stat; 739 ops.xp_getargs = 740 (bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort; 741 ops.xp_reply = 742 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 743 ops.xp_freeargs = 744 (bool_t (*)(SVCXPRT *, xdrproc_t, caddr_t))abort; 745 ops.xp_destroy = svc_vc_destroy; 746 ops2.xp_control = svc_vc_rendezvous_control; 747 } 748 xprt->xp_ops = &ops; 749 xprt->xp_ops2 = &ops2; 750 mutex_unlock(&ops_lock); 751 } 752 753 /* 754 * Destroy xprts that have not have had any activity in 'timeout' seconds. 755 * If 'cleanblock' is true, blocking connections (the default) are also 756 * cleaned. If timeout is 0, the least active connection is picked. 757 */ 758 bool_t 759 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 760 { 761 int i, ncleaned; 762 SVCXPRT *xprt, *least_active; 763 struct timeval tv, tdiff, tmax; 764 struct cf_conn *cd; 765 766 gettimeofday(&tv, NULL); 767 tmax.tv_sec = tmax.tv_usec = 0; 768 least_active = NULL; 769 rwlock_wrlock(&svc_fd_lock); 770 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 771 if (FD_ISSET(i, fds)) { 772 xprt = __svc_xports[i]; 773 if (xprt == NULL || xprt->xp_ops == NULL || 774 xprt->xp_ops->xp_recv != svc_vc_recv) 775 continue; 776 cd = (struct cf_conn *)xprt->xp_p1; 777 if (!cleanblock && !cd->nonblock) 778 continue; 779 if (timeout == 0) { 780 timersub(&tv, &cd->last_recv_time, &tdiff); 781 if (timercmp(&tdiff, &tmax, >)) { 782 tmax = tdiff; 783 least_active = xprt; 784 } 785 continue; 786 } 787 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 788 __xprt_unregister_unlocked(xprt); 789 __svc_vc_dodestroy(xprt); 790 ncleaned++; 791 } 792 } 793 } 794 if (timeout == 0 && least_active != NULL) { 795 __xprt_unregister_unlocked(least_active); 796 __svc_vc_dodestroy(least_active); 797 ncleaned++; 798 } 799 rwlock_unlock(&svc_fd_lock); 800 return ncleaned > 0 ? TRUE : FALSE; 801 } 802
Indexes created Thu Oct 02 14:10:14 GMT 2025