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 = mem_alloc(sizeof(SVCXPRT)); 150 if (xprt == NULL) { 151 warnx("svc_vc_create: out of memory"); 152 goto cleanup_svc_vc_create; 153 } 154 xprt->xp_tp = NULL; 155 xprt->xp_p1 = r; 156 xprt->xp_p2 = NULL; 157 xprt->xp_p3 = NULL; 158 xprt->xp_verf = _null_auth; 159 svc_vc_rendezvous_ops(xprt); 160 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 161 xprt->xp_fd = fd; 162 163 slen = sizeof (struct sockaddr_storage); 164 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 165 warnx("svc_vc_create: could not retrieve local addr"); 166 goto cleanup_svc_vc_create; 167 } 168 169 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 170 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 171 if (xprt->xp_ltaddr.buf == NULL) { 172 warnx("svc_vc_create: no mem for local addr"); 173 goto cleanup_svc_vc_create; 174 } 175 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 176 177 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 178 xprt_register(xprt); 179 return (xprt); 180 cleanup_svc_vc_create: 181 if (xprt) 182 mem_free(xprt, sizeof(*xprt)); 183 if (r != NULL) 184 mem_free(r, sizeof(*r)); 185 return (NULL); 186 } 187 188 /* 189 * Like svtcp_create(), except the routine takes any *open* UNIX file 190 * descriptor as its first input. 191 */ 192 SVCXPRT * 193 svc_fd_create(fd, sendsize, recvsize) 194 int fd; 195 u_int sendsize; 196 u_int recvsize; 197 { 198 struct sockaddr_storage ss; 199 socklen_t slen; 200 SVCXPRT *ret; 201 202 assert(fd != -1); 203 204 ret = makefd_xprt(fd, sendsize, recvsize); 205 if (ret == NULL) 206 return NULL; 207 208 slen = sizeof (struct sockaddr_storage); 209 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 210 warnx("svc_fd_create: could not retrieve local addr"); 211 goto freedata; 212 } 213 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 214 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 215 if (ret->xp_ltaddr.buf == NULL) { 216 warnx("svc_fd_create: no mem for local addr"); 217 goto freedata; 218 } 219 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 220 221 slen = sizeof (struct sockaddr_storage); 222 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 223 warnx("svc_fd_create: could not retrieve remote addr"); 224 goto freedata; 225 } 226 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 227 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 228 if (ret->xp_rtaddr.buf == NULL) { 229 warnx("svc_fd_create: no mem for local addr"); 230 goto freedata; 231 } 232 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 233 #ifdef PORTMAP 234 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 235 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 236 ret->xp_addrlen = sizeof (struct sockaddr_in); 237 } 238 #endif /* PORTMAP */ 239 240 return ret; 241 242 freedata: 243 if (ret->xp_ltaddr.buf != NULL) 244 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 245 246 return NULL; 247 } 248 249 static SVCXPRT * 250 makefd_xprt(fd, sendsize, recvsize) 251 int fd; 252 u_int sendsize; 253 u_int recvsize; 254 { 255 SVCXPRT *xprt; 256 struct cf_conn *cd; 257 const char *netid; 258 struct __rpc_sockinfo si; 259 260 assert(fd != -1); 261 262 xprt = mem_alloc(sizeof(SVCXPRT)); 263 if (xprt == NULL) { 264 warnx("svc_vc: makefd_xprt: out of memory"); 265 goto done; 266 } 267 memset(xprt, 0, sizeof *xprt); 268 cd = mem_alloc(sizeof(struct cf_conn)); 269 if (cd == NULL) { 270 warnx("svc_tcp: makefd_xprt: out of memory"); 271 mem_free(xprt, sizeof(SVCXPRT)); 272 xprt = NULL; 273 goto done; 274 } 275 cd->strm_stat = XPRT_IDLE; 276 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 277 xprt, read_vc, write_vc); 278 xprt->xp_p1 = cd; 279 xprt->xp_verf.oa_base = cd->verf_body; 280 svc_vc_ops(xprt); /* truely deals with calls */ 281 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 282 xprt->xp_fd = fd; 283 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 284 xprt->xp_netid = strdup(netid); 285 286 xprt_register(xprt); 287 done: 288 return (xprt); 289 } 290 291 /*ARGSUSED*/ 292 static bool_t 293 rendezvous_request(xprt, msg) 294 SVCXPRT *xprt; 295 struct rpc_msg *msg; 296 { 297 int sock, flags; 298 struct cf_rendezvous *r; 299 struct cf_conn *cd; 300 struct sockaddr_storage addr; 301 socklen_t len; 302 struct __rpc_sockinfo si; 303 SVCXPRT *newxprt; 304 fd_set cleanfds; 305 306 assert(xprt != NULL); 307 assert(msg != NULL); 308 309 r = (struct cf_rendezvous *)xprt->xp_p1; 310 again: 311 len = sizeof addr; 312 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 313 &len)) < 0) { 314 if (errno == EINTR) 315 goto again; 316 /* 317 * Clean out the most idle file descriptor when we're 318 * running out. 319 */ 320 if (errno == EMFILE || errno == ENFILE) { 321 cleanfds = svc_fdset; 322 __svc_clean_idle(&cleanfds, 0, FALSE); 323 goto again; 324 } 325 return (FALSE); 326 } 327 /* 328 * make a new transporter (re-uses xprt) 329 */ 330 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 331 newxprt->xp_rtaddr.buf = mem_alloc(len); 332 if (newxprt->xp_rtaddr.buf == NULL) 333 return (FALSE); 334 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 335 newxprt->xp_rtaddr.len = len; 336 #ifdef PORTMAP 337 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) { 338 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 339 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 340 } 341 #endif /* PORTMAP */ 342 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 343 len = 1; 344 /* XXX fvdl - is this useful? */ 345 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 346 } 347 348 cd = (struct cf_conn *)newxprt->xp_p1; 349 350 cd->recvsize = r->recvsize; 351 cd->sendsize = r->sendsize; 352 cd->maxrec = r->maxrec; 353 354 if (cd->maxrec != 0) { 355 flags = _fcntl(sock, F_GETFL, 0); 356 if (flags == -1) 357 return (FALSE); 358 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 359 return (FALSE); 360 if (cd->recvsize > cd->maxrec) 361 cd->recvsize = cd->maxrec; 362 cd->nonblock = TRUE; 363 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 364 } else 365 cd->nonblock = FALSE; 366 367 gettimeofday(&cd->last_recv_time, NULL); 368 369 return (FALSE); /* there is never an rpc msg to be processed */ 370 } 371 372 /*ARGSUSED*/ 373 static enum xprt_stat 374 rendezvous_stat(xprt) 375 SVCXPRT *xprt; 376 { 377 378 return (XPRT_IDLE); 379 } 380 381 static void 382 svc_vc_destroy(xprt) 383 SVCXPRT *xprt; 384 { 385 assert(xprt != NULL); 386 387 xprt_unregister(xprt); 388 __svc_vc_dodestroy(xprt); 389 } 390 391 static void 392 __svc_vc_dodestroy(xprt) 393 SVCXPRT *xprt; 394 { 395 struct cf_conn *cd; 396 struct cf_rendezvous *r; 397 398 cd = (struct cf_conn *)xprt->xp_p1; 399 400 if (xprt->xp_fd != RPC_ANYFD) 401 (void)_close(xprt->xp_fd); 402 if (xprt->xp_port != 0) { 403 /* a rendezvouser socket */ 404 r = (struct cf_rendezvous *)xprt->xp_p1; 405 mem_free(r, sizeof (struct cf_rendezvous)); 406 xprt->xp_port = 0; 407 } else { 408 /* an actual connection socket */ 409 XDR_DESTROY(&(cd->xdrs)); 410 mem_free(cd, sizeof(struct cf_conn)); 411 } 412 if (xprt->xp_rtaddr.buf) 413 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 414 if (xprt->xp_ltaddr.buf) 415 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 416 if (xprt->xp_tp) 417 free(xprt->xp_tp); 418 if (xprt->xp_netid) 419 free(xprt->xp_netid); 420 mem_free(xprt, sizeof(SVCXPRT)); 421 } 422 423 /*ARGSUSED*/ 424 static bool_t 425 svc_vc_control(xprt, rq, in) 426 SVCXPRT *xprt; 427 const u_int rq; 428 void *in; 429 { 430 return (FALSE); 431 } 432 433 static bool_t 434 svc_vc_rendezvous_control(xprt, rq, in) 435 SVCXPRT *xprt; 436 const u_int rq; 437 void *in; 438 { 439 struct cf_rendezvous *cfp; 440 441 cfp = (struct cf_rendezvous *)xprt->xp_p1; 442 if (cfp == NULL) 443 return (FALSE); 444 switch (rq) { 445 case SVCGET_CONNMAXREC: 446 *(int *)in = cfp->maxrec; 447 break; 448 case SVCSET_CONNMAXREC: 449 cfp->maxrec = *(int *)in; 450 break; 451 default: 452 return (FALSE); 453 } 454 return (TRUE); 455 } 456 457 /* 458 * reads data from the tcp or uip connection. 459 * any error is fatal and the connection is closed. 460 * (And a read of zero bytes is a half closed stream => error.) 461 * All read operations timeout after 35 seconds. A timeout is 462 * fatal for the connection. 463 */ 464 static int 465 read_vc(xprtp, buf, len) 466 void *xprtp; 467 void *buf; 468 int len; 469 { 470 SVCXPRT *xprt; 471 int sock; 472 int milliseconds = 35 * 1000; 473 struct pollfd pollfd; 474 struct cf_conn *cfp; 475 476 xprt = (SVCXPRT *)xprtp; 477 assert(xprt != NULL); 478 479 sock = xprt->xp_fd; 480 481 cfp = (struct cf_conn *)xprt->xp_p1; 482 483 if (cfp->nonblock) { 484 len = _read(sock, buf, (size_t)len); 485 if (len < 0) { 486 if (errno == EAGAIN) 487 len = 0; 488 else 489 goto fatal_err; 490 } 491 if (len != 0) 492 gettimeofday(&cfp->last_recv_time, NULL); 493 return len; 494 } 495 496 do { 497 pollfd.fd = sock; 498 pollfd.events = POLLIN; 499 pollfd.revents = 0; 500 switch (_poll(&pollfd, 1, milliseconds)) { 501 case -1: 502 if (errno == EINTR) 503 continue; 504 /*FALLTHROUGH*/ 505 case 0: 506 goto fatal_err; 507 508 default: 509 break; 510 } 511 } while ((pollfd.revents & POLLIN) == 0); 512 513 if ((len = _read(sock, buf, (size_t)len)) > 0) { 514 gettimeofday(&cfp->last_recv_time, NULL); 515 return (len); 516 } 517 518 fatal_err: 519 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 520 return (-1); 521 } 522 523 /* 524 * writes data to the tcp connection. 525 * Any error is fatal and the connection is closed. 526 */ 527 static int 528 write_vc(xprtp, buf, len) 529 void *xprtp; 530 void *buf; 531 int len; 532 { 533 SVCXPRT *xprt; 534 int i, cnt; 535 struct cf_conn *cd; 536 struct timeval tv0, tv1; 537 538 xprt = (SVCXPRT *)xprtp; 539 assert(xprt != NULL); 540 541 cd = (struct cf_conn *)xprt->xp_p1; 542 543 if (cd->nonblock) 544 gettimeofday(&tv0, NULL); 545 546 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 547 i = _write(xprt->xp_fd, buf, (size_t)cnt); 548 if (i < 0) { 549 if (errno != EAGAIN || !cd->nonblock) { 550 cd->strm_stat = XPRT_DIED; 551 return (-1); 552 } 553 if (cd->nonblock && i != cnt) { 554 /* 555 * For non-blocking connections, do not 556 * take more than 2 seconds writing the 557 * data out. 558 * 559 * XXX 2 is an arbitrary amount. 560 */ 561 gettimeofday(&tv1, NULL); 562 if (tv1.tv_sec - tv0.tv_sec >= 2) { 563 cd->strm_stat = XPRT_DIED; 564 return (-1); 565 } 566 } 567 } 568 } 569 570 return (len); 571 } 572 573 static enum xprt_stat 574 svc_vc_stat(xprt) 575 SVCXPRT *xprt; 576 { 577 struct cf_conn *cd; 578 579 assert(xprt != NULL); 580 581 cd = (struct cf_conn *)(xprt->xp_p1); 582 583 if (cd->strm_stat == XPRT_DIED) 584 return (XPRT_DIED); 585 if (! xdrrec_eof(&(cd->xdrs))) 586 return (XPRT_MOREREQS); 587 return (XPRT_IDLE); 588 } 589 590 static bool_t 591 svc_vc_recv(xprt, msg) 592 SVCXPRT *xprt; 593 struct rpc_msg *msg; 594 { 595 struct cf_conn *cd; 596 XDR *xdrs; 597 598 assert(xprt != NULL); 599 assert(msg != NULL); 600 601 cd = (struct cf_conn *)(xprt->xp_p1); 602 xdrs = &(cd->xdrs); 603 604 if (cd->nonblock) { 605 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 606 return FALSE; 607 } 608 609 xdrs->x_op = XDR_DECODE; 610 (void)xdrrec_skiprecord(xdrs); 611 if (xdr_callmsg(xdrs, msg)) { 612 cd->x_id = msg->rm_xid; 613 return (TRUE); 614 } 615 cd->strm_stat = XPRT_DIED; 616 return (FALSE); 617 } 618 619 static bool_t 620 svc_vc_getargs(xprt, xdr_args, args_ptr) 621 SVCXPRT *xprt; 622 xdrproc_t xdr_args; 623 void *args_ptr; 624 { 625 626 assert(xprt != NULL); 627 /* args_ptr may be NULL */ 628 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 629 args_ptr)); 630 } 631 632 static bool_t 633 svc_vc_freeargs(xprt, xdr_args, args_ptr) 634 SVCXPRT *xprt; 635 xdrproc_t xdr_args; 636 void *args_ptr; 637 { 638 XDR *xdrs; 639 640 assert(xprt != NULL); 641 /* args_ptr may be NULL */ 642 643 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 644 645 xdrs->x_op = XDR_FREE; 646 return ((*xdr_args)(xdrs, args_ptr)); 647 } 648 649 static bool_t 650 svc_vc_reply(xprt, msg) 651 SVCXPRT *xprt; 652 struct rpc_msg *msg; 653 { 654 struct cf_conn *cd; 655 XDR *xdrs; 656 bool_t rstat; 657 658 assert(xprt != NULL); 659 assert(msg != NULL); 660 661 cd = (struct cf_conn *)(xprt->xp_p1); 662 xdrs = &(cd->xdrs); 663 664 xdrs->x_op = XDR_ENCODE; 665 msg->rm_xid = cd->x_id; 666 rstat = xdr_replymsg(xdrs, msg); 667 (void)xdrrec_endofrecord(xdrs, TRUE); 668 return (rstat); 669 } 670 671 static void 672 svc_vc_ops(xprt) 673 SVCXPRT *xprt; 674 { 675 static struct xp_ops ops; 676 static struct xp_ops2 ops2; 677 678 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 679 680 mutex_lock(&ops_lock); 681 if (ops.xp_recv == NULL) { 682 ops.xp_recv = svc_vc_recv; 683 ops.xp_stat = svc_vc_stat; 684 ops.xp_getargs = svc_vc_getargs; 685 ops.xp_reply = svc_vc_reply; 686 ops.xp_freeargs = svc_vc_freeargs; 687 ops.xp_destroy = svc_vc_destroy; 688 ops2.xp_control = svc_vc_control; 689 } 690 xprt->xp_ops = &ops; 691 xprt->xp_ops2 = &ops2; 692 mutex_unlock(&ops_lock); 693 } 694 695 static void 696 svc_vc_rendezvous_ops(xprt) 697 SVCXPRT *xprt; 698 { 699 static struct xp_ops ops; 700 static struct xp_ops2 ops2; 701 702 mutex_lock(&ops_lock); 703 if (ops.xp_recv == NULL) { 704 ops.xp_recv = rendezvous_request; 705 ops.xp_stat = rendezvous_stat; 706 ops.xp_getargs = 707 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 708 ops.xp_reply = 709 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 710 ops.xp_freeargs = 711 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort, 712 ops.xp_destroy = svc_vc_destroy; 713 ops2.xp_control = svc_vc_rendezvous_control; 714 } 715 xprt->xp_ops = &ops; 716 xprt->xp_ops2 = &ops2; 717 mutex_unlock(&ops_lock); 718 } 719 720 /* 721 * Get the effective UID of the sending process. Used by rpcbind, keyserv 722 * and rpc.yppasswdd on AF_LOCAL. 723 */ 724 int 725 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 726 int sock, ret; 727 gid_t egid; 728 uid_t euid; 729 struct sockaddr *sa; 730 731 sock = transp->xp_fd; 732 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 733 if (sa->sa_family == AF_LOCAL) { 734 ret = getpeereid(sock, &euid, &egid); 735 if (ret == 0) 736 *uid = euid; 737 return (ret); 738 } else 739 return (-1); 740 } 741 742 /* 743 * Destroy xprts that have not have had any activity in 'timeout' seconds. 744 * If 'cleanblock' is true, blocking connections (the default) are also 745 * cleaned. If timeout is 0, the least active connection is picked. 746 */ 747 bool_t 748 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 749 { 750 int i, ncleaned; 751 SVCXPRT *xprt, *least_active; 752 struct timeval tv, tdiff, tmax; 753 struct cf_conn *cd; 754 755 gettimeofday(&tv, NULL); 756 tmax.tv_sec = tmax.tv_usec = 0; 757 least_active = NULL; 758 rwlock_wrlock(&svc_fd_lock); 759 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 760 if (FD_ISSET(i, fds)) { 761 xprt = __svc_xports[i]; 762 if (xprt == NULL || xprt->xp_ops == NULL || 763 xprt->xp_ops->xp_recv != svc_vc_recv) 764 continue; 765 cd = (struct cf_conn *)xprt->xp_p1; 766 if (!cleanblock && !cd->nonblock) 767 continue; 768 if (timeout == 0) { 769 timersub(&tv, &cd->last_recv_time, &tdiff); 770 if (timercmp(&tdiff, &tmax, >)) { 771 tmax = tdiff; 772 least_active = xprt; 773 } 774 continue; 775 } 776 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 777 __xprt_unregister_unlocked(xprt); 778 __svc_vc_dodestroy(xprt); 779 ncleaned++; 780 } 781 } 782 } 783 if (timeout == 0 && least_active != NULL) { 784 __xprt_unregister_unlocked(least_active); 785 __svc_vc_dodestroy(least_active); 786 ncleaned++; 787 } 788 rwlock_unlock(&svc_fd_lock); 789 return ncleaned > 0 ? TRUE : FALSE; 790 } 791