1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro 30 * @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC 31 * $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ 32 * $FreeBSD: src/lib/libc/rpc/svc_vc.c,v 1.27 2008/03/30 09:36:17 dfr Exp $ 33 */ 34 35 /* 36 * svc_vc.c, Server side for Connection Oriented based RPC. 37 * 38 * Actually implements two flavors of transporter - 39 * a tcp rendezvouser (a listner and connection establisher) 40 * and a record/tcp stream. 41 */ 42 43 #include "namespace.h" 44 #include "reentrant.h" 45 #include <sys/types.h> 46 #include <sys/param.h> 47 #include <sys/poll.h> 48 #include <sys/socket.h> 49 #include <sys/un.h> 50 #include <sys/time.h> 51 #include <sys/uio.h> 52 #include <netinet/in.h> 53 #include <netinet/tcp.h> 54 55 #include <assert.h> 56 #include <err.h> 57 #include <errno.h> 58 #include <fcntl.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 #include <rpc/rpc.h> 65 66 #include "rpc_com.h" 67 #include "mt_misc.h" 68 #include "un-namespace.h" 69 70 static SVCXPRT *makefd_xprt(int, u_int, u_int); 71 static bool_t rendezvous_request(SVCXPRT *, struct rpc_msg *); 72 static enum xprt_stat rendezvous_stat(SVCXPRT *); 73 static void svc_vc_destroy(SVCXPRT *); 74 static void __svc_vc_dodestroy (SVCXPRT *); 75 static int read_vc(void *, void *, int); 76 static int write_vc(void *, void *, int); 77 static enum xprt_stat svc_vc_stat(SVCXPRT *); 78 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *); 79 static bool_t svc_vc_getargs(SVCXPRT *, xdrproc_t, void *); 80 static bool_t svc_vc_freeargs(SVCXPRT *, xdrproc_t, void *); 81 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *); 82 static void svc_vc_rendezvous_ops(SVCXPRT *); 83 static void svc_vc_ops(SVCXPRT *); 84 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 85 static bool_t svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, 86 void *in); 87 88 struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */ 89 u_int sendsize; 90 u_int recvsize; 91 int maxrec; 92 }; 93 94 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 95 enum xprt_stat strm_stat; 96 u_int32_t x_id; 97 XDR xdrs; 98 char verf_body[MAX_AUTH_BYTES]; 99 u_int sendsize; 100 u_int recvsize; 101 int maxrec; 102 bool_t nonblock; 103 struct timeval last_recv_time; 104 }; 105 106 /* 107 * Usage: 108 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 109 * 110 * Creates, registers, and returns a (rpc) tcp based transporter. 111 * Once *xprt is initialized, it is registered as a transporter 112 * see (svc.h, xprt_register). This routine returns 113 * a NULL if a problem occurred. 114 * 115 * The filedescriptor passed in is expected to refer to a bound, but 116 * not yet connected socket. 117 * 118 * Since streams do buffered io similar to stdio, the caller can specify 119 * how big the send and receive buffers are via the second and third parms; 120 * 0 => use the system default. 121 */ 122 SVCXPRT * 123 svc_vc_create(int fd, u_int sendsize, u_int recvsize) 124 { 125 SVCXPRT *xprt; 126 struct cf_rendezvous *r = NULL; 127 struct __rpc_sockinfo si; 128 struct sockaddr_storage sslocal; 129 socklen_t slen; 130 131 if (!__rpc_fd2sockinfo(fd, &si)) 132 return NULL; 133 134 r = mem_alloc(sizeof(*r)); 135 if (r == NULL) { 136 warnx("svc_vc_create: out of memory"); 137 goto cleanup_svc_vc_create; 138 } 139 r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize); 140 r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize); 141 r->maxrec = __svc_maxrec; 142 xprt = mem_alloc(sizeof(SVCXPRT)); 143 if (xprt == NULL) { 144 warnx("svc_vc_create: out of memory"); 145 goto cleanup_svc_vc_create; 146 } 147 xprt->xp_tp = NULL; 148 xprt->xp_p1 = r; 149 xprt->xp_p2 = NULL; 150 xprt->xp_p3 = NULL; 151 xprt->xp_verf = _null_auth; 152 svc_vc_rendezvous_ops(xprt); 153 xprt->xp_port = (u_short)-1; /* It is the rendezvouser */ 154 xprt->xp_fd = fd; 155 156 slen = sizeof (struct sockaddr_storage); 157 if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) { 158 warnx("svc_vc_create: could not retrieve local addr"); 159 goto cleanup_svc_vc_create; 160 } 161 162 xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len; 163 xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len); 164 if (xprt->xp_ltaddr.buf == NULL) { 165 warnx("svc_vc_create: no mem for local addr"); 166 goto cleanup_svc_vc_create; 167 } 168 memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len); 169 170 xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage); 171 xprt_register(xprt); 172 return (xprt); 173 cleanup_svc_vc_create: 174 if (xprt) 175 mem_free(xprt, sizeof(*xprt)); 176 if (r != NULL) 177 mem_free(r, sizeof(*r)); 178 return (NULL); 179 } 180 181 /* 182 * Like svtcp_create(), except the routine takes any *open* UNIX file 183 * descriptor as its first input. 184 */ 185 SVCXPRT * 186 svc_fd_create(int fd, u_int sendsize, u_int recvsize) 187 { 188 struct sockaddr_storage ss; 189 socklen_t slen; 190 SVCXPRT *ret; 191 192 assert(fd != -1); 193 194 ret = makefd_xprt(fd, sendsize, recvsize); 195 if (ret == NULL) 196 return NULL; 197 198 slen = sizeof (struct sockaddr_storage); 199 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 200 warnx("svc_fd_create: could not retrieve local addr"); 201 goto freedata; 202 } 203 ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len; 204 ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len); 205 if (ret->xp_ltaddr.buf == NULL) { 206 warnx("svc_fd_create: no mem for local addr"); 207 goto freedata; 208 } 209 memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len); 210 211 slen = sizeof (struct sockaddr_storage); 212 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) { 213 warnx("svc_fd_create: could not retrieve remote addr"); 214 goto freedata; 215 } 216 ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len; 217 ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len); 218 if (ret->xp_rtaddr.buf == NULL) { 219 warnx("svc_fd_create: no mem for local addr"); 220 goto freedata; 221 } 222 memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len); 223 #ifdef PORTMAP 224 if (ss.ss_family == AF_INET || ss.ss_family == AF_LOCAL) { 225 ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf; 226 ret->xp_addrlen = sizeof (struct sockaddr_in); 227 } 228 #endif /* PORTMAP */ 229 230 return ret; 231 232 freedata: 233 if (ret->xp_ltaddr.buf != NULL) 234 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen); 235 236 return NULL; 237 } 238 239 static SVCXPRT * 240 makefd_xprt(int fd, u_int sendsize, u_int recvsize) 241 { 242 SVCXPRT *xprt; 243 struct cf_conn *cd; 244 const char *netid; 245 struct __rpc_sockinfo si; 246 247 assert(fd != -1); 248 249 xprt = mem_alloc(sizeof(SVCXPRT)); 250 if (xprt == NULL) { 251 warnx("svc_vc: makefd_xprt: out of memory"); 252 goto done; 253 } 254 memset(xprt, 0, sizeof *xprt); 255 cd = mem_alloc(sizeof(struct cf_conn)); 256 if (cd == NULL) { 257 warnx("svc_tcp: makefd_xprt: out of memory"); 258 mem_free(xprt, sizeof(SVCXPRT)); 259 xprt = NULL; 260 goto done; 261 } 262 cd->strm_stat = XPRT_IDLE; 263 xdrrec_create(&(cd->xdrs), sendsize, recvsize, 264 xprt, read_vc, write_vc); 265 xprt->xp_p1 = cd; 266 xprt->xp_verf.oa_base = cd->verf_body; 267 svc_vc_ops(xprt); /* truely deals with calls */ 268 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ 269 xprt->xp_fd = fd; 270 if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid)) 271 xprt->xp_netid = strdup(netid); 272 273 xprt_register(xprt); 274 done: 275 return (xprt); 276 } 277 278 /*ARGSUSED*/ 279 static bool_t 280 rendezvous_request(SVCXPRT *xprt, struct rpc_msg *msg) 281 { 282 int sock, flags; 283 struct cf_rendezvous *r; 284 struct cf_conn *cd; 285 struct sockaddr_storage addr; 286 socklen_t len; 287 struct __rpc_sockinfo si; 288 SVCXPRT *newxprt; 289 fd_set cleanfds; 290 291 assert(xprt != NULL); 292 assert(msg != NULL); 293 294 r = (struct cf_rendezvous *)xprt->xp_p1; 295 again: 296 len = sizeof addr; 297 if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr, 298 &len)) < 0) { 299 if (errno == EINTR) 300 goto again; 301 /* 302 * Clean out the most idle file descriptor when we're 303 * running out. 304 */ 305 if (errno == EMFILE || errno == ENFILE) { 306 cleanfds = svc_fdset; 307 __svc_clean_idle(&cleanfds, 0, FALSE); 308 goto again; 309 } 310 return (FALSE); 311 } 312 /* 313 * make a new transporter (re-uses xprt) 314 */ 315 newxprt = makefd_xprt(sock, r->sendsize, r->recvsize); 316 newxprt->xp_rtaddr.buf = mem_alloc(len); 317 if (newxprt->xp_rtaddr.buf == NULL) 318 return (FALSE); 319 memcpy(newxprt->xp_rtaddr.buf, &addr, len); 320 newxprt->xp_rtaddr.len = len; 321 #ifdef PORTMAP 322 if (addr.ss_family == AF_INET || addr.ss_family == AF_LOCAL) { 323 newxprt->xp_raddr = *(struct sockaddr_in *)newxprt->xp_rtaddr.buf; 324 newxprt->xp_addrlen = sizeof (struct sockaddr_in); 325 } 326 #endif /* PORTMAP */ 327 if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) { 328 len = 1; 329 /* XXX fvdl - is this useful? */ 330 _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len)); 331 } 332 333 cd = (struct cf_conn *)newxprt->xp_p1; 334 335 cd->recvsize = r->recvsize; 336 cd->sendsize = r->sendsize; 337 cd->maxrec = r->maxrec; 338 339 if (cd->maxrec != 0) { 340 flags = _fcntl(sock, F_GETFL, 0); 341 if (flags == -1) 342 return (FALSE); 343 if (_fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) 344 return (FALSE); 345 if (cd->recvsize > cd->maxrec) 346 cd->recvsize = cd->maxrec; 347 cd->nonblock = TRUE; 348 __xdrrec_setnonblock(&cd->xdrs, cd->maxrec); 349 } else 350 cd->nonblock = FALSE; 351 352 gettimeofday(&cd->last_recv_time, NULL); 353 354 return (FALSE); /* there is never an rpc msg to be processed */ 355 } 356 357 /*ARGSUSED*/ 358 static enum xprt_stat 359 rendezvous_stat(SVCXPRT *xprt) 360 { 361 362 return (XPRT_IDLE); 363 } 364 365 static void 366 svc_vc_destroy(SVCXPRT *xprt) 367 { 368 assert(xprt != NULL); 369 370 xprt_unregister(xprt); 371 __svc_vc_dodestroy(xprt); 372 } 373 374 static void 375 __svc_vc_dodestroy(SVCXPRT *xprt) 376 { 377 struct cf_conn *cd; 378 struct cf_rendezvous *r; 379 380 cd = (struct cf_conn *)xprt->xp_p1; 381 382 if (xprt->xp_fd != RPC_ANYFD) 383 _close(xprt->xp_fd); 384 if (xprt->xp_port != 0) { 385 /* a rendezvouser socket */ 386 r = (struct cf_rendezvous *)xprt->xp_p1; 387 mem_free(r, sizeof (struct cf_rendezvous)); 388 xprt->xp_port = 0; 389 } else { 390 /* an actual connection socket */ 391 XDR_DESTROY(&(cd->xdrs)); 392 mem_free(cd, sizeof(struct cf_conn)); 393 } 394 if (xprt->xp_rtaddr.buf) 395 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen); 396 if (xprt->xp_ltaddr.buf) 397 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen); 398 if (xprt->xp_tp) 399 free(xprt->xp_tp); 400 if (xprt->xp_netid) 401 free(xprt->xp_netid); 402 mem_free(xprt, sizeof(SVCXPRT)); 403 } 404 405 /*ARGSUSED*/ 406 static bool_t 407 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 408 { 409 return (FALSE); 410 } 411 412 static bool_t 413 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 414 { 415 struct cf_rendezvous *cfp; 416 417 cfp = (struct cf_rendezvous *)xprt->xp_p1; 418 if (cfp == NULL) 419 return (FALSE); 420 switch (rq) { 421 case SVCGET_CONNMAXREC: 422 *(int *)in = cfp->maxrec; 423 break; 424 case SVCSET_CONNMAXREC: 425 cfp->maxrec = *(int *)in; 426 break; 427 default: 428 return (FALSE); 429 } 430 return (TRUE); 431 } 432 433 /* 434 * reads data from the tcp or uip connection. 435 * any error is fatal and the connection is closed. 436 * (And a read of zero bytes is a half closed stream => error.) 437 * All read operations timeout after 35 seconds. A timeout is 438 * fatal for the connection. 439 */ 440 static int 441 read_vc(void *xprtp, void *buf, int len) 442 { 443 SVCXPRT *xprt; 444 int sock; 445 int milliseconds = 35 * 1000; 446 struct pollfd pollfd; 447 struct cf_conn *cfp; 448 449 xprt = (SVCXPRT *)xprtp; 450 assert(xprt != NULL); 451 452 sock = xprt->xp_fd; 453 454 cfp = (struct cf_conn *)xprt->xp_p1; 455 456 if (cfp->nonblock) { 457 len = _read(sock, buf, (size_t)len); 458 if (len < 0) { 459 if (errno == EAGAIN) 460 len = 0; 461 else 462 goto fatal_err; 463 } 464 if (len != 0) 465 gettimeofday(&cfp->last_recv_time, NULL); 466 return len; 467 } 468 469 do { 470 pollfd.fd = sock; 471 pollfd.events = POLLIN; 472 pollfd.revents = 0; 473 switch (_poll(&pollfd, 1, milliseconds)) { 474 case -1: 475 if (errno == EINTR) 476 continue; 477 /*FALLTHROUGH*/ 478 case 0: 479 goto fatal_err; 480 481 default: 482 break; 483 } 484 } while ((pollfd.revents & POLLIN) == 0); 485 486 if ((len = _read(sock, buf, (size_t)len)) > 0) { 487 gettimeofday(&cfp->last_recv_time, NULL); 488 return (len); 489 } 490 491 fatal_err: 492 ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED; 493 return (-1); 494 } 495 496 /* 497 * writes data to the tcp connection. 498 * Any error is fatal and the connection is closed. 499 */ 500 static int 501 write_vc(void *xprtp, void *buf, int len) 502 { 503 SVCXPRT *xprt; 504 int i, cnt; 505 struct cf_conn *cd; 506 struct timeval tv0, tv1; 507 508 xprt = (SVCXPRT *)xprtp; 509 assert(xprt != NULL); 510 511 cd = (struct cf_conn *)xprt->xp_p1; 512 513 if (cd->nonblock) 514 gettimeofday(&tv0, NULL); 515 516 for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) { 517 i = _write(xprt->xp_fd, buf, (size_t)cnt); 518 if (i < 0) { 519 if (errno != EAGAIN || !cd->nonblock) { 520 cd->strm_stat = XPRT_DIED; 521 return (-1); 522 } 523 if (cd->nonblock && i != cnt) { 524 /* 525 * For non-blocking connections, do not 526 * take more than 2 seconds writing the 527 * data out. 528 * 529 * XXX 2 is an arbitrary amount. 530 */ 531 gettimeofday(&tv1, NULL); 532 if (tv1.tv_sec - tv0.tv_sec >= 2) { 533 cd->strm_stat = XPRT_DIED; 534 return (-1); 535 } 536 } 537 } 538 } 539 540 return (len); 541 } 542 543 static enum xprt_stat 544 svc_vc_stat(SVCXPRT *xprt) 545 { 546 struct cf_conn *cd; 547 548 assert(xprt != NULL); 549 550 cd = (struct cf_conn *)(xprt->xp_p1); 551 552 if (cd->strm_stat == XPRT_DIED) 553 return (XPRT_DIED); 554 if (! xdrrec_eof(&(cd->xdrs))) 555 return (XPRT_MOREREQS); 556 return (XPRT_IDLE); 557 } 558 559 static bool_t 560 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg) 561 { 562 struct cf_conn *cd; 563 XDR *xdrs; 564 565 assert(xprt != NULL); 566 assert(msg != NULL); 567 568 cd = (struct cf_conn *)(xprt->xp_p1); 569 xdrs = &(cd->xdrs); 570 571 if (cd->nonblock) { 572 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE)) 573 return FALSE; 574 } else { 575 xdrrec_skiprecord(xdrs); 576 } 577 578 xdrs->x_op = XDR_DECODE; 579 if (xdr_callmsg(xdrs, msg)) { 580 cd->x_id = msg->rm_xid; 581 return (TRUE); 582 } 583 cd->strm_stat = XPRT_DIED; 584 return (FALSE); 585 } 586 587 static bool_t 588 svc_vc_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 589 { 590 591 assert(xprt != NULL); 592 /* args_ptr may be NULL */ 593 return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs), 594 args_ptr)); 595 } 596 597 static bool_t 598 svc_vc_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, void *args_ptr) 599 { 600 XDR *xdrs; 601 602 assert(xprt != NULL); 603 /* args_ptr may be NULL */ 604 605 xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs); 606 607 xdrs->x_op = XDR_FREE; 608 return ((*xdr_args)(xdrs, args_ptr)); 609 } 610 611 static bool_t 612 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg) 613 { 614 struct cf_conn *cd; 615 XDR *xdrs; 616 bool_t rstat; 617 618 assert(xprt != NULL); 619 assert(msg != NULL); 620 621 cd = (struct cf_conn *)(xprt->xp_p1); 622 xdrs = &(cd->xdrs); 623 624 xdrs->x_op = XDR_ENCODE; 625 msg->rm_xid = cd->x_id; 626 rstat = xdr_replymsg(xdrs, msg); 627 xdrrec_endofrecord(xdrs, TRUE); 628 return (rstat); 629 } 630 631 static void 632 svc_vc_ops(SVCXPRT *xprt) 633 { 634 static struct xp_ops ops; 635 static struct xp_ops2 ops2; 636 637 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */ 638 639 mutex_lock(&ops_lock); 640 if (ops.xp_recv == NULL) { 641 ops.xp_recv = svc_vc_recv; 642 ops.xp_stat = svc_vc_stat; 643 ops.xp_getargs = svc_vc_getargs; 644 ops.xp_reply = svc_vc_reply; 645 ops.xp_freeargs = svc_vc_freeargs; 646 ops.xp_destroy = svc_vc_destroy; 647 ops2.xp_control = svc_vc_control; 648 } 649 xprt->xp_ops = &ops; 650 xprt->xp_ops2 = &ops2; 651 mutex_unlock(&ops_lock); 652 } 653 654 static void 655 svc_vc_rendezvous_ops(SVCXPRT *xprt) 656 { 657 static struct xp_ops ops; 658 static struct xp_ops2 ops2; 659 660 mutex_lock(&ops_lock); 661 if (ops.xp_recv == NULL) { 662 ops.xp_recv = rendezvous_request; 663 ops.xp_stat = rendezvous_stat; 664 ops.xp_getargs = 665 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort; 666 ops.xp_reply = 667 (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort; 668 ops.xp_freeargs = 669 (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort, 670 ops.xp_destroy = svc_vc_destroy; 671 ops2.xp_control = svc_vc_rendezvous_control; 672 } 673 xprt->xp_ops = &ops; 674 xprt->xp_ops2 = &ops2; 675 mutex_unlock(&ops_lock); 676 } 677 678 /* 679 * Get the effective UID of the sending process. Used by rpcbind, keyserv 680 * and rpc.yppasswdd on AF_LOCAL. 681 */ 682 int 683 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) 684 { 685 int sock, ret; 686 gid_t egid; 687 uid_t euid; 688 struct sockaddr *sa; 689 690 sock = transp->xp_fd; 691 sa = (struct sockaddr *)transp->xp_rtaddr.buf; 692 if (sa->sa_family == AF_LOCAL) { 693 ret = getpeereid(sock, &euid, &egid); 694 if (ret == 0) 695 *uid = euid; 696 return (ret); 697 } else 698 return (-1); 699 } 700 701 /* 702 * Destroy xprts that have not have had any activity in 'timeout' seconds. 703 * If 'cleanblock' is true, blocking connections (the default) are also 704 * cleaned. If timeout is 0, the least active connection is picked. 705 */ 706 bool_t 707 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock) 708 { 709 int i, ncleaned; 710 SVCXPRT *xprt, *least_active; 711 struct timeval tv, tdiff, tmax; 712 struct cf_conn *cd; 713 714 gettimeofday(&tv, NULL); 715 tmax.tv_sec = tmax.tv_usec = 0; 716 least_active = NULL; 717 rwlock_wrlock(&svc_fd_lock); 718 for (i = ncleaned = 0; i <= svc_maxfd; i++) { 719 if (FD_ISSET(i, fds)) { 720 xprt = __svc_xports[i]; 721 if (xprt == NULL || xprt->xp_ops == NULL || 722 xprt->xp_ops->xp_recv != svc_vc_recv) 723 continue; 724 cd = (struct cf_conn *)xprt->xp_p1; 725 if (!cleanblock && !cd->nonblock) 726 continue; 727 if (timeout == 0) { 728 timersub(&tv, &cd->last_recv_time, &tdiff); 729 if (timercmp(&tdiff, &tmax, >)) { 730 tmax = tdiff; 731 least_active = xprt; 732 } 733 continue; 734 } 735 if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) { 736 __xprt_unregister_unlocked(xprt); 737 __svc_vc_dodestroy(xprt); 738 ncleaned++; 739 } 740 } 741 } 742 if (timeout == 0 && least_active != NULL) { 743 __xprt_unregister_unlocked(least_active); 744 __svc_vc_dodestroy(least_active); 745 ncleaned++; 746 } 747 rwlock_unlock(&svc_fd_lock); 748 return ncleaned > 0 ? TRUE : FALSE; 749 } 750