1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 34 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35 #endif 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * svc_vc.c, Server side for Connection Oriented based RPC. 41 * 42 * Actually implements two flavors of transporter - 43 * a tcp rendezvouser (a listner and connection establisher) 44 * and a record/tcp stream. 45 */ 46 47 #include "namespace.h" 48 #include "reentrant.h" 49 #include <sys/types.h> 50 #include <sys/param.h> 51 #include <sys/poll.h> 52 #include <sys/socket.h> 53 #include <sys/un.h> 54 #include <sys/time.h> 55 #include <sys/uio.h> 56 #include <netinet/in.h> 57 #include <netinet/tcp.h> 58 59 #include <assert.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 68 #include <rpc/rpc.h> 69 70 #include "rpc_com.h" 71 #include "mt_misc.h" 72 #include "un-namespace.h" 73 74 static SVCXPRT *makefd_xprt(int, u_int, u_int); 75 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 76 static enum xprt_stat rendezvous_stat(SVCXPRT *); 77 static void svc_vc_destroy(SVCXPRT *); 78 static void __svc_vc_dodestroy (SVCXPRT *); 79 static int read_vc(void *, void *, int); 80 static int write_vc(void *, void *, int); 81 static enum xprt_stat svc_vc_stat(SVCXPRT *); 82 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 83 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 84 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 85 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 86 static void svc_vc_rendezvous_ops(SVCXPRT *); 87 static void svc_vc_ops(SVCXPRT *); 88 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 89 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 90 void *in); 91 92 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 93 u_int sendsize; 94 u_int recvsize; 95 int maxrec; 96 }; 97 98 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 99 enum xprt_stat strm_stat; 100 u_int32_t x_id; 101 XDR xdrs; 102 char verf_body[MAX_AUTH_BYTES]; 103 u_int sendsize; 104 u_int recvsize; 105 int maxrec; 106 bool_t nonblock; 107 struct timeval last_recv_time; 108 }; 109 110 /* 111 * Usage: 112 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 113 * 114 * Creates, registers, and returns a (rpc) tcp based transporter. 115 * Once *xprt is initialized, it is registered as a transporter 116 * see (svc.h, xprt_register). This routine returns 117 * a NULL if a problem occurred. 118 * 119 * The filedescriptor passed in is expected to refer to a bound, but 120 * not yet connected socket. 121 * 122 * Since streams do buffered io similar to stdio, the caller can specify 123 * how big the send and receive buffers are via the second and third parms; 124 * 0 => use the system default. 125 */ 126 SVCXPRT * 127 svc_vc_create(fd, sendsize, recvsize) 128 int fd; 129 u_int sendsize; 130 u_int recvsize; 131 { 132 SVCXPRT *xprt; 133 struct cf_rendezvous *r = NULL; 134 struct __rpc_sockinfo si; 135 struct sockaddr_storage sslocal; 136 socklen_t slen; 137 138 if (!__rpc_fd2sockinfo(fd, &si)) 139 return NULL; 140 141 r = mem_alloc(sizeof(*r)); 142 if (r == NULL) { 143 warnx("svc_vc_create: out of memory"); 144 goto cleanup_svc_vc_create; 145 } 146 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 147 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 148 r->maxrec = __svc_maxrec; 149 xprt = svc_xprt_alloc(); 150 if (xprt == NULL) { 151 warnx("svc_vc_create: out of memory"); 152 goto cleanup_svc_vc_create; 153 } 154 xprt->xp_p1 = r; 155 xprt->xp_verf = _null_auth; 156 svc_vc_rendezvous_ops(xprt); 157 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 158 xprt->xp_fd = fd; 159 160 slen = sizeof (struct sockaddr_storage); 161 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 162 warnx("svc_vc_create: could not retrieve local addr"); 163 goto cleanup_svc_vc_create; 164 } 165 166 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 167 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 168 if (xprt->xp_ltaddr.buf == NULL) { 169 warnx("svc_vc_create: no mem for local addr"); 170 goto cleanup_svc_vc_create; 171 } 172 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 173 174 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 175 xprt_register(xprt); 176 return (xprt); 177 cleanup_svc_vc_create: 178 if (xprt) 179 mem_free(xprt, sizeof(*xprt)); 180 if (r != NULL) 181 mem_free(r, sizeof(*r)); 182 return (NULL); 183 } 184 185 /* 186 * Like svtcp_create(), except the routine takes any *open* UNIX file 187 * descriptor as its first input. 188 */ 189 SVCXPRT * 190 svc_fd_create(fd, sendsize, recvsize) 191 int fd; 192 u_int sendsize; 193 u_int recvsize; 194 { 195 struct sockaddr_storage ss; 196 socklen_t slen; 197 SVCXPRT *ret; 198 199 assert(fd != -1); 200 201 ret = makefd_xprt(fd, sendsize, recvsize); 202 if (ret == NULL) 203 return NULL; 204 205 slen = sizeof (struct sockaddr_storage); 206 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 207 warnx("svc_fd_create: could not retrieve local addr"); 208 goto freedata; 209 } 210 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 211 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 212 if (ret->xp_ltaddr.buf == NULL) { 213 warnx("svc_fd_create: no mem for local addr"); 214 goto freedata; 215 } 216 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 217 218 slen = sizeof (struct sockaddr_storage); 219 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 220 warnx("svc_fd_create: could not retrieve remote addr"); 221 goto freedata; 222 } 223 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 224 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 225 if (ret->xp_rtaddr.buf == NULL) { 226 warnx("svc_fd_create: no mem for local addr"); 227 goto freedata; 228 } 229 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 230 #ifdef PORTMAP 231 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 232 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 233 ret->xp_addrlen = sizeof (struct sockaddr_in); 234 } 235 #endif /* PORTMAP */ 236 237 return ret; 238 239 freedata: 240 if (ret->xp_ltaddr.buf != NULL) 241 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 242 243 return NULL; 244 } 245 246 static SVCXPRT * 247 makefd_xprt(fd, sendsize, recvsize) 248 int fd; 249 u_int sendsize; 250 u_int recvsize; 251 { 252 SVCXPRT *xprt; 253 struct cf_conn *cd; 254 const char *netid; 255 struct __rpc_sockinfo si; 256 257 assert(fd != -1); 258 259 xprt = svc_xprt_alloc(); 260 if (xprt == NULL) { 261 warnx("svc_vc: makefd_xprt: out of memory"); 262 goto done; 263 } 264 cd = mem_alloc(sizeof(struct cf_conn)); 265 if (cd == NULL) { 266 warnx("svc_tcp: makefd_xprt: out of memory"); 267 svc_xprt_free(xprt); 268 xprt = NULL; 269 goto done; 270 } 271 cd->strm_stat = XPRT_IDLE; 272 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 273 xprt, read_vc, write_vc); 274 xprt->xp_p1 = cd; 275 xprt->xp_verf.oa_base = cd->verf_body; 276 svc_vc_ops(xprt); /* truely deals with calls */ 277 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 278 xprt->xp_fd = fd; 279 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 280 xprt->xp_netid = strdup(netid); 281 282 xprt_register(xprt); 283 done: 284 return (xprt); 285 } 286 287 /*ARGSUSED*/ 288 static bool_t 289 rendezvous_request(xprt, msg) 290 SVCXPRT *xprt; 291 struct rpc_msg *msg; 292 { 293 int sock, flags; 294 struct cf_rendezvous *r; 295 struct cf_conn *cd; 296 struct sockaddr_storage addr; 297 socklen_t len; 298 struct __rpc_sockinfo si; 299 SVCXPRT *newxprt; 300 fd_set cleanfds; 301 302 assert(xprt != NULL); 303 assert(msg != NULL); 304 305 r = (struct cf_rendezvous *)xprt->xp_p1; 306 again: 307 len = sizeof addr; 308 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 309 &len)) < 0) { 310 if (errno == EINTR) 311 goto again; 312 /* 313 * Clean out the most idle file descriptor when we're 314 * running out. 315 */ 316 if (errno == EMFILE || errno == ENFILE) { 317 cleanfds = svc_fdset; 318 __svc_clean_idle(&cleanfds, 0, FALSE); 319 goto again; 320 } 321 return (FALSE); 322 } 323 /* 324 * make a new transporter (re-uses xprt) 325 */ 326 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 327 newxprt->xp_rtaddr.buf = mem_alloc(len); 328 if (newxprt->xp_rtaddr.buf == NULL) 329 return (FALSE); 330 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 331 newxprt->xp_rtaddr.len = len; 332 #ifdef PORTMAP 333 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) { 334 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 335 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 336 } 337 #endif /* PORTMAP */ 338 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 339 len = 1; 340 /* XXX fvdl - is this useful? */ 341 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 342 } 343 344 cd = (struct cf_conn *)newxprt->xp_p1; 345 346 cd->recvsize = r->recvsize; 347 cd->sendsize = r->sendsize; 348 cd->maxrec = r->maxrec; 349 350 if (cd->maxrec != 0) { 351 flags = _fcntl(sock, F_GETFL, 0); 352 if (flags == -1) 353 return (FALSE); 354 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 355 return (FALSE); 356 if (cd->recvsize > cd->maxrec) 357 cd->recvsize = cd->maxrec; 358 cd->nonblock = TRUE; 359 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 360 } else 361 cd->nonblock = FALSE; 362 363 gettimeofday(&cd->last_recv_time, NULL); 364 365 return (FALSE); /* there is never an rpc msg to be processed */ 366 } 367 368 /*ARGSUSED*/ 369 static enum xprt_stat 370 rendezvous_stat(xprt) 371 SVCXPRT *xprt; 372 { 373 374 return (XPRT_IDLE); 375 } 376 377 static void 378 svc_vc_destroy(xprt) 379 SVCXPRT *xprt; 380 { 381 assert(xprt != NULL); 382 383 xprt_unregister(xprt); 384 __svc_vc_dodestroy(xprt); 385 } 386 387 static void 388 __svc_vc_dodestroy(xprt) 389 SVCXPRT *xprt; 390 { 391 struct cf_conn *cd; 392 struct cf_rendezvous *r; 393 394 cd = (struct cf_conn *)xprt->xp_p1; 395 396 if (xprt->xp_fd != RPC_ANYFD) 397 (void)_close(xprt->xp_fd); 398 if (xprt->xp_port != 0) { 399 /* a rendezvouser socket */ 400 r = (struct cf_rendezvous *)xprt->xp_p1; 401 mem_free(r, sizeof (struct cf_rendezvous)); 402 xprt->xp_port = 0; 403 } else { 404 /* an actual connection socket */ 405 XDR_DESTROY(&(cd->xdrs)); 406 mem_free(cd, sizeof(struct cf_conn)); 407 } 408 if (xprt->xp_rtaddr.buf) 409 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 410 if (xprt->xp_ltaddr.buf) 411 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 412 if (xprt->xp_tp) 413 free(xprt->xp_tp); 414 if (xprt->xp_netid) 415 free(xprt->xp_netid); 416 svc_xprt_free(xprt); 417 } 418 419 /*ARGSUSED*/ 420 static bool_t 421 svc_vc_control(xprt, rq, in) 422 SVCXPRT *xprt; 423 const u_int rq; 424 void *in; 425 { 426 return (FALSE); 427 } 428 429 static bool_t 430 svc_vc_rendezvous_control(xprt, rq, in) 431 SVCXPRT *xprt; 432 const u_int rq; 433 void *in; 434 { 435 struct cf_rendezvous *cfp; 436 437 cfp = (struct cf_rendezvous *)xprt->xp_p1; 438 if (cfp == NULL) 439 return (FALSE); 440 switch (rq) { 441 case SVCGET_CONNMAXREC: 442 *(int *)in = cfp->maxrec; 443 break; 444 case SVCSET_CONNMAXREC: 445 cfp->maxrec = *(int *)in; 446 break; 447 default: 448 return (FALSE); 449 } 450 return (TRUE); 451 } 452 453 /* 454 * reads data from the tcp or uip connection. 455 * any error is fatal and the connection is closed. 456 * (And a read of zero bytes is a half closed stream => error.) 457 * All read operations timeout after 35 seconds. A timeout is 458 * fatal for the connection. 459 */ 460 static int 461 read_vc(xprtp, buf, len) 462 void *xprtp; 463 void *buf; 464 int len; 465 { 466 SVCXPRT *xprt; 467 int sock; 468 int milliseconds = 35 * 1000; 469 struct pollfd pollfd; 470 struct cf_conn *cfp; 471 472 xprt = (SVCXPRT *)xprtp; 473 assert(xprt != NULL); 474 475 sock = xprt->xp_fd; 476 477 cfp = (struct cf_conn *)xprt->xp_p1; 478 479 if (cfp->nonblock) { 480 len = _read(sock, buf, (size_t)len); 481 if (len < 0) { 482 if (errno == EAGAIN) 483 len = 0; 484 else 485 goto fatal_err; 486 } 487 if (len != 0) 488 gettimeofday(&cfp->last_recv_time, NULL); 489 return len; 490 } 491 492 do { 493 pollfd.fd = sock; 494 pollfd.events = POLLIN; 495 pollfd.revents = 0; 496 switch (_poll(&pollfd, 1, milliseconds)) { 497 case -1: 498 if (errno == EINTR) 499 continue; 500 /*FALLTHROUGH*/ 501 case 0: 502 goto fatal_err; 503 504 default: 505 break; 506 } 507 } while ((pollfd.revents & POLLIN) == 0); 508 509 if ((len = _read(sock, buf, (size_t)len)) > 0) { 510 gettimeofday(&cfp->last_recv_time, NULL); 511 return (len); 512 } 513 514 fatal_err: 515 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 516 return (-1); 517 } 518 519 /* 520 * writes data to the tcp connection. 521 * Any error is fatal and the connection is closed. 522 */ 523 static int 524 write_vc(xprtp, buf, len) 525 void *xprtp; 526 void *buf; 527 int len; 528 { 529 SVCXPRT *xprt; 530 int i, cnt; 531 struct cf_conn *cd; 532 struct timeval tv0, tv1; 533 534 xprt = (SVCXPRT *)xprtp; 535 assert(xprt != NULL); 536 537 cd = (struct cf_conn *)xprt->xp_p1; 538 539 if (cd->nonblock) 540 gettimeofday(&tv0, NULL); 541 542 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 543 i = _write(xprt->xp_fd, buf, (size_t)cnt); 544 if (i < 0) { 545 if (errno != EAGAIN || !cd->nonblock) { 546 cd->strm_stat = XPRT_DIED; 547 return (-1); 548 } 549 if (cd->nonblock && i != cnt) { 550 /* 551 * For non-blocking connections, do not 552 * take more than 2 seconds writing the 553 * data out. 554 * 555 * XXX 2 is an arbitrary amount. 556 */ 557 gettimeofday(&tv1, NULL); 558 if (tv1.tv_sec - tv0.tv_sec >= 2) { 559 cd->strm_stat = XPRT_DIED; 560 return (-1); 561 } 562 } 563 } 564 } 565 566 return (len); 567 } 568 569 static enum xprt_stat 570 svc_vc_stat(xprt) 571 SVCXPRT *xprt; 572 { 573 struct cf_conn *cd; 574 575 assert(xprt != NULL); 576 577 cd = (struct cf_conn *)(xprt->xp_p1); 578 579 if (cd->strm_stat == XPRT_DIED) 580 return (XPRT_DIED); 581 if (! xdrrec_eof(&(cd->xdrs))) 582 return (XPRT_MOREREQS); 583 return (XPRT_IDLE); 584 } 585 586 static bool_t 587 svc_vc_recv(xprt, msg) 588 SVCXPRT *xprt; 589 struct rpc_msg *msg; 590 { 591 struct cf_conn *cd; 592 XDR *xdrs; 593 594 assert(xprt != NULL); 595 assert(msg != NULL); 596 597 cd = (struct cf_conn *)(xprt->xp_p1); 598 xdrs = &(cd->xdrs); 599 600 if (cd->nonblock) { 601 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 602 return FALSE; 603 } else { 604 (void)xdrrec_skiprecord(xdrs); 605 } 606 607 xdrs->x_op = XDR_DECODE; 608 if (xdr_callmsg(xdrs, msg)) { 609 cd->x_id = msg->rm_xid; 610 return (TRUE); 611 } 612 cd->strm_stat = XPRT_DIED; 613 return (FALSE); 614 } 615 616 static bool_t 617 svc_vc_getargs(xprt, xdr_args, args_ptr) 618 SVCXPRT *xprt; 619 xdrproc_t xdr_args; 620 void *args_ptr; 621 { 622 struct cf_conn *cd; 623 624 assert(xprt != NULL); 625 cd = (struct cf_conn *)(xprt->xp_p1); 626 return (SVCAUTH_UNWRAP(&SVC_AUTH(xprt), 627 &cd->xdrs, xdr_args, args_ptr)); 628 } 629 630 static bool_t 631 svc_vc_freeargs(xprt, xdr_args, args_ptr) 632 SVCXPRT *xprt; 633 xdrproc_t xdr_args; 634 void *args_ptr; 635 { 636 XDR *xdrs; 637 638 assert(xprt != NULL); 639 /* args_ptr may be NULL */ 640 641 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 642 643 xdrs->x_op = XDR_FREE; 644 return ((*xdr_args)(xdrs, args_ptr)); 645 } 646 647 static bool_t 648 svc_vc_reply(xprt, msg) 649 SVCXPRT *xprt; 650 struct rpc_msg *msg; 651 { 652 struct cf_conn *cd; 653 XDR *xdrs; 654 bool_t rstat; 655 xdrproc_t xdr_proc; 656 caddr_t xdr_where; 657 u_int pos; 658 659 assert(xprt != NULL); 660 assert(msg != NULL); 661 662 cd = (struct cf_conn *)(xprt->xp_p1); 663 xdrs = &(cd->xdrs); 664 665 xdrs->x_op = XDR_ENCODE; 666 msg->rm_xid = cd->x_id; 667 rstat = TRUE; 668 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 669 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 670 xdr_proc = msg->acpted_rply.ar_results.proc; 671 xdr_where = msg->acpted_rply.ar_results.where; 672 msg->acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 673 msg->acpted_rply.ar_results.where = NULL; 674 675 pos = XDR_GETPOS(xdrs); 676 if (!xdr_replymsg(xdrs, msg) || 677 !SVCAUTH_WRAP(&SVC_AUTH(xprt), xdrs, xdr_proc, xdr_where)) { 678 XDR_SETPOS(xdrs, pos); 679 rstat = FALSE; 680 } 681 } else { 682 rstat = xdr_replymsg(xdrs, msg); 683 } 684 685 if (rstat) 686 (void)xdrrec_endofrecord(xdrs, TRUE); 687 688 return (rstat); 689 } 690 691 static void 692 svc_vc_ops(xprt) 693 SVCXPRT *xprt; 694 { 695 static struct xp_ops ops; 696 static struct xp_ops2 ops2; 697 698 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 699 700 mutex_lock(&ops_lock); 701 if (ops.xp_recv == NULL) { 702 ops.xp_recv = svc_vc_recv; 703 ops.xp_stat = svc_vc_stat; 704 ops.xp_getargs = svc_vc_getargs; 705 ops.xp_reply = svc_vc_reply; 706 ops.xp_freeargs = svc_vc_freeargs; 707 ops.xp_destroy = svc_vc_destroy; 708 ops2.xp_control = svc_vc_control; 709 } 710 xprt->xp_ops = &ops; 711 xprt->xp_ops2 = &ops2; 712 mutex_unlock(&ops_lock); 713 } 714 715 static void 716 svc_vc_rendezvous_ops(xprt) 717 SVCXPRT *xprt; 718 { 719 static struct xp_ops ops; 720 static struct xp_ops2 ops2; 721 722 mutex_lock(&ops_lock); 723 if (ops.xp_recv == NULL) { 724 ops.xp_recv = rendezvous_request; 725 ops.xp_stat = rendezvous_stat; 726 ops.xp_getargs = 727 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 728 ops.xp_reply = 729 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 730 ops.xp_freeargs = 731 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort, 732 ops.xp_destroy = svc_vc_destroy; 733 ops2.xp_control = svc_vc_rendezvous_control; 734 } 735 xprt->xp_ops = &ops; 736 xprt->xp_ops2 = &ops2; 737 mutex_unlock(&ops_lock); 738 } 739 740 /* 741 * Get the effective UID of the sending process. Used by rpcbind, keyserv 742 * and rpc.yppasswdd on AF_LOCAL. 743 */ 744 int 745 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 746 int sock, ret; 747 gid_t egid; 748 uid_t euid; 749 struct sockaddr *sa; 750 751 sock = transp->xp_fd; 752 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 753 if (sa->sa_family == AF_LOCAL) { 754 ret = getpeereid(sock, &euid, &egid); 755 if (ret == 0) 756 *uid = euid; 757 return (ret); 758 } else 759 return (-1); 760 } 761 762 /* 763 * Destroy xprts that have not have had any activity in 'timeout' seconds. 764 * If 'cleanblock' is true, blocking connections (the default) are also 765 * cleaned. If timeout is 0, the least active connection is picked. 766 */ 767 bool_t 768 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 769 { 770 int i, ncleaned; 771 SVCXPRT *xprt, *least_active; 772 struct timeval tv, tdiff, tmax; 773 struct cf_conn *cd; 774 775 gettimeofday(&tv, NULL); 776 tmax.tv_sec = tmax.tv_usec = 0; 777 least_active = NULL; 778 rwlock_wrlock(&svc_fd_lock); 779 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 780 if (FD_ISSET(i, fds)) { 781 xprt = __svc_xports[i]; 782 if (xprt == NULL || xprt->xp_ops == NULL || 783 xprt->xp_ops->xp_recv != svc_vc_recv) 784 continue; 785 cd = (struct cf_conn *)xprt->xp_p1; 786 if (!cleanblock && !cd->nonblock) 787 continue; 788 if (timeout == 0) { 789 timersub(&tv, &cd->last_recv_time, &tdiff); 790 if (timercmp(&tdiff, &tmax, >)) { 791 tmax = tdiff; 792 least_active = xprt; 793 } 794 continue; 795 } 796 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 797 __xprt_unregister_unlocked(xprt); 798 __svc_vc_dodestroy(xprt); 799 ncleaned++; 800 } 801 } 802 } 803 if (timeout == 0 && least_active != NULL) { 804 __xprt_unregister_unlocked(least_active); 805 __svc_vc_dodestroy(least_active); 806 ncleaned++; 807 } 808 rwlock_unlock(&svc_fd_lock); 809 return ncleaned > 0 ? TRUE : FALSE; 810 } 811