dll/3rdparty/libtirpc/src/svc_vc.c

   1
   2 /*
   3  * Copyright (c) 2009, Sun Microsystems, Inc.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  * - Redistributions of source code must retain the above copyright notice,
   9  *   this list of conditions and the following disclaimer.
  10  * - Redistributions in binary form must reproduce the above copyright notice,
  11  *   this list of conditions and the following disclaimer in the documentation
  12  *   and/or other materials provided with the distribution.
  13  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  14  *   contributors may be used to endorse or promote products derived
  15  *   from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  21  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 //#include <sys/cdefs.h>
  31
  32 /*
  33  * svc_vc.c, Server side for Connection Oriented based RPC.
  34  *
  35  * Actually implements two flavors of transporter -
  36  * a tcp rendezvouser (a listner and connection establisher)
  37  * and a record/tcp stream.
  38  */
  39 #include <wintirpc.h>
  40 //#include <pthread.h>
  41 #include <reentrant.h>
  42 //#include <sys/socket.h>
  43 #include <sys/types.h>
  44 //#include <sys/param.h>
  45 //#include <sys/poll.h>
  46 //#include <sys/un.h>
  47 //#include <sys/time.h>
  48 //#include <sys/uio.h>
  49 //#include <netinet/in.h>
  50 //#include <netinet/tcp.h>
  51
  52 #include <assert.h>
  53 //#include <err.h>
  54 #include <errno.h>
  55 #include <fcntl.h>
  56 #include <stdio.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 //#include <unistd.h>
  60
  61 #include <rpc/rpc.h>
  62
  63 #include "rpc_com.h"
  64
  65 #include <getpeereid.h>
  66
  67
  68 extern rwlock_t svc_fd_lock;
  69
  70 static SVCXPRT *makefd_xprt(SOCKET, 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  * This is used to set xprt->xp_raddr in a way legacy
 108  * apps can deal with
 109  */
 110 void
 111 __xprt_set_raddr(SVCXPRT *xprt, const struct sockaddr_storage *ss)
 112 {
 113         switch (ss->ss_family) {
 114         case AF_INET6:
 115                 memcpy(&xprt->xp_raddr, ss, sizeof(struct sockaddr_in6));
 116                 xprt->xp_addrlen = sizeof (struct sockaddr_in6);
 117                 break;
 118         case AF_INET:
 119                 memcpy(&xprt->xp_raddr, ss, sizeof(struct sockaddr_in));
 120                 xprt->xp_addrlen = sizeof (struct sockaddr_in);
 121                 break;
 122         default:
 123                 xprt->xp_raddr.sin6_family = AF_UNSPEC;
 124                 xprt->xp_addrlen = sizeof (struct sockaddr);
 125                 break;
 126         }
 127 }
 128
 129 /*
 130  * Usage:
 131  *      xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
 132  *
 133  * Creates, registers, and returns a (rpc) tcp based transporter.
 134  * Once *xprt is initialized, it is registered as a transporter
 135  * see (svc.h, xprt_register).  This routine returns
 136  * a NULL if a problem occurred.
 137  *
 138  * The filedescriptor passed in is expected to refer to a bound, but
 139  * not yet connected socket.
 140  *
 141  * Since streams do buffered io similar to stdio, the caller can specify
 142  * how big the send and receive buffers are via the second and third parms;
 143  * 0 => use the system default.
 144  */
 145 SVCXPRT *
 146 svc_vc_create(fd, sendsize, recvsize)
 147         int fd;
 148         u_int sendsize;
 149         u_int recvsize;
 150 {
 151         SVCXPRT *xprt;
 152         struct cf_rendezvous *r = NULL;
 153         struct __rpc_sockinfo si;
 154         struct sockaddr_storage sslocal;
 155         socklen_t slen;
 156
 157         r = mem_alloc(sizeof(*r));
 158         if (r == NULL) {
 159                 // XXX warnx("svc_vc_create: out of memory");
 160                 goto cleanup_svc_vc_create;
 161         }
 162         if (!__rpc_fd2sockinfo(fd, &si))
 163                 return NULL;
 164         r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
 165         r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
 166         r->maxrec = __svc_maxrec;
 167         xprt = mem_alloc(sizeof(SVCXPRT));
 168         if (xprt == NULL) {
 169                 // XXX warnx("svc_vc_create: out of memory");
 170                 goto cleanup_svc_vc_create;
 171         }
 172         xprt->xp_tp = NULL;
 173         xprt->xp_p1 = r;
 174         xprt->xp_p2 = NULL;
 175         xprt->xp_p3 = NULL;
 176         xprt->xp_verf = _null_auth;
 177         svc_vc_rendezvous_ops(xprt);
 178         xprt->xp_port = (u_short)-1;    /* It is the rendezvouser */
 179         xprt->xp_fd = fd;
 180
 181         slen = sizeof (struct sockaddr_storage);
 182         if (getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) == SOCKET_ERROR) {
 183                 // XXX warnx("svc_vc_create: could not retrieve local addr");
 184                 goto cleanup_svc_vc_create;
 185         }
 186
 187         if (!__rpc_set_netbuf(&xprt->xp_ltaddr, &sslocal, sizeof(sslocal))) {
 188                 // XXX warnx("svc_vc_create: no mem for local addr");
 189                 goto cleanup_svc_vc_create;
 190         }
 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         SOCKET fd;
 206         u_int sendsize;
 207         u_int recvsize;
 208 {
 209         struct sockaddr_storage ss;
 210         socklen_t slen;
 211         SVCXPRT *ret;
 212
 213         assert(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) == SOCKET_ERROR) {
 221                 // XXX warnx("svc_fd_create: could not retrieve local addr");
 222                 goto freedata;
 223         }
 224         if (!__rpc_set_netbuf(&ret->xp_ltaddr, &ss, sizeof(ss))) {
 225                 // XXX warnx("svc_fd_create: no mem for local addr");
 226                 goto freedata;
 227         }
 228
 229         slen = sizeof (struct sockaddr_storage);
 230         if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) == SOCKET_ERROR) {
 231                 // XXX warnx("svc_fd_create: could not retrieve remote addr");
 232                 goto freedata;
 233         }
 234         if (!__rpc_set_netbuf(&ret->xp_rtaddr, &ss, sizeof(ss))) {
 235                 // XXX warnx("svc_fd_create: no mem for local addr");
 236                 goto freedata;
 237         }
 238
 239         /* Set xp_raddr for compatibility */
 240         __xprt_set_raddr(ret, &ss);
 241
 242         return ret;
 243
 244 freedata:
 245         if (ret->xp_ltaddr.buf != NULL)
 246                 mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
 247
 248         return NULL;
 249 }
 250
 251 static SVCXPRT *
 252 makefd_xprt(fd, sendsize, recvsize)
 253         SOCKET fd;
 254         u_int sendsize;
 255         u_int recvsize;
 256 {
 257         SVCXPRT *xprt;
 258         struct cf_conn *cd;
 259         const char *netid;
 260         struct __rpc_sockinfo si;
 261
 262         assert(fd != SOCKET_ERROR);
 263
 264         if (fd >= FD_SETSIZE) {
 265                 // XXX warnx("svc_vc: makefd_xprt: fd too high\n");
 266                 xprt = NULL;
 267                 goto done;
 268         }
 269
 270         xprt = mem_alloc(sizeof(SVCXPRT));
 271         if (xprt == NULL) {
 272                 // XXX warnx("svc_vc: makefd_xprt: out of memory");
 273                 goto done;
 274         }
 275         memset(xprt, 0, sizeof *xprt);
 276         cd = mem_alloc(sizeof(struct cf_conn));
 277         if (cd == NULL) {
 278                 // XXX warnx("svc_tcp: makefd_xprt: out of memory");
 279                 mem_free(xprt, sizeof(SVCXPRT));
 280                 xprt = NULL;
 281                 goto done;
 282         }
 283         cd->strm_stat = XPRT_IDLE;
 284         xdrrec_create(&(cd->xdrs), sendsize, recvsize,
 285             xprt, read_vc, write_vc);
 286         xprt->xp_p1 = cd;
 287         xprt->xp_verf.oa_base = cd->verf_body;
 288         svc_vc_ops(xprt);  /* truely deals with calls */
 289         xprt->xp_port = 0;  /* this is a connection, not a rendezvouser */
 290         xprt->xp_fd = fd;
 291         if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
 292                 xprt->xp_netid = strdup(netid);
 293
 294         xprt_register(xprt);
 295 done:
 296         return (xprt);
 297 }
 298
 299 /*ARGSUSED*/
 300 static bool_t
 301 rendezvous_request(xprt, msg)
 302         SVCXPRT *xprt;
 303         struct rpc_msg *msg;
 304 {
 305         SOCKET sock;
 306 #ifndef _WIN32
 307         int flags;
 308 #endif
 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         assert(xprt != NULL);
 318         assert(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)) == SOCKET_ERROR) {
 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
 342         newxprt = makefd_xprt(sock, r->sendsize, r->recvsize);
 343
 344         if (!__rpc_set_netbuf(&newxprt->xp_rtaddr, &addr, len))
 345                 return (FALSE);
 346
 347         __xprt_set_raddr(newxprt, &addr);
 348
 349         if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
 350                 len = 1;
 351                 /* XXX fvdl - is this useful? */
 352                 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (const char *)&len, sizeof (len));
 353         }
 354
 355         cd = (struct cf_conn *)newxprt->xp_p1;
 356
 357         cd->recvsize = r->recvsize;
 358         cd->sendsize = r->sendsize;
 359         cd->maxrec = r->maxrec;
 360
 361 #ifndef _WIN32
 362         if (cd->maxrec != 0) {
 363                 flags = fcntl(sock, F_GETFL, 0);
 364                 if (flags  == -1)
 365                         return (FALSE);
 366                 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1)
 367                         return (FALSE);
 368                 if (cd->recvsize > 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 #endif  /* _WIN32 */
 375
 376         gettimeofday(&cd->last_recv_time, NULL);
 377
 378         return (FALSE); /* there is never an rpc msg to be processed */
 379 }
 380
 381 /*ARGSUSED*/
 382 static enum xprt_stat
 383 rendezvous_stat(xprt)
 384         SVCXPRT *xprt;
 385 {
 386
 387         return (XPRT_IDLE);
 388 }
 389
 390 static void
 391 svc_vc_destroy(xprt)
 392         SVCXPRT *xprt;
 393 {
 394         assert(xprt != NULL);
 395
 396         xprt_unregister(xprt);
 397         __svc_vc_dodestroy(xprt);
 398 }
 399
 400 static void
 401 __svc_vc_dodestroy(xprt)
 402         SVCXPRT *xprt;
 403 {
 404         struct cf_conn *cd;
 405         struct cf_rendezvous *r;
 406
 407         cd = (struct cf_conn *)xprt->xp_p1;
 408
 409         if (xprt->xp_fd != RPC_ANYFD)
 410                 (void)closesocket(xprt->xp_fd);
 411         if (xprt->xp_port != 0) {
 412                 /* a rendezvouser socket */
 413                 r = (struct cf_rendezvous *)xprt->xp_p1;
 414                 mem_free(r, sizeof (struct cf_rendezvous));
 415                 xprt->xp_port = 0;
 416         } else {
 417                 /* an actual connection socket */
 418                 XDR_DESTROY(&(cd->xdrs));
 419                 mem_free(cd, sizeof(struct cf_conn));
 420         }
 421         if (xprt->xp_rtaddr.buf)
 422                 mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
 423         if (xprt->xp_ltaddr.buf)
 424                 mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
 425         if (xprt->xp_tp)
 426                 free(xprt->xp_tp);
 427         if (xprt->xp_netid)
 428                 free(xprt->xp_netid);
 429         mem_free(xprt, sizeof(SVCXPRT));
 430 }
 431
 432 /*ARGSUSED*/
 433 static bool_t
 434 svc_vc_control(xprt, rq, in)
 435         SVCXPRT *xprt;
 436         const u_int rq;
 437         void *in;
 438 {
 439         return (FALSE);
 440 }
 441
 442 static bool_t
 443 svc_vc_rendezvous_control(xprt, rq, in)
 444         SVCXPRT *xprt;
 445         const u_int rq;
 446         void *in;
 447 {
 448         struct cf_rendezvous *cfp;
 449
 450         cfp = (struct cf_rendezvous *)xprt->xp_p1;
 451         if (cfp == NULL)
 452                 return (FALSE);
 453         switch (rq) {
 454                 case SVCGET_CONNMAXREC:
 455                         *(int *)in = cfp->maxrec;
 456                         break;
 457                 case SVCSET_CONNMAXREC:
 458                         cfp->maxrec = *(int *)in;
 459                         break;
 460                 default:
 461                         return (FALSE);
 462         }
 463         return (TRUE);
 464 }
 465
 466 /*
 467  * reads data from the tcp or uip connection.
 468  * any error is fatal and the connection is closed.
 469  * (And a read of zero bytes is a half closed stream => error.)
 470  * All read operations timeout after 35 seconds.  A timeout is
 471  * fatal for the connection.
 472  */
 473 static int
 474 read_vc(xprtp, buf, len)
 475         void *xprtp;
 476         void *buf;
 477         int len;
 478 {
 479         SVCXPRT *xprt;
 480         SOCKET sock;
 481         int milliseconds = 35 * 1000;
 482         struct pollfd pollfd;
 483         struct cf_conn *cfp;
 484
 485         xprt = (SVCXPRT *)xprtp;
 486         assert(xprt != NULL);
 487
 488         sock = xprt->xp_fd;
 489
 490         cfp = (struct cf_conn *)xprt->xp_p1;
 491
 492         if (cfp->nonblock) {
 493 #ifdef _WIN32
 494                 len = recv(sock, buf, (size_t)len, 0);
 495 #else
 496                 len = read(sock, buf, (size_t)len);
 497 #endif
 498                 if (len == SOCKET_ERROR) {
 499                         if (WSAGetLastError() == EAGAIN)
 500                                 len = 0;
 501                         else
 502                                 goto fatal_err;
 503                 }
 504                 if (len != 0)
 505                         gettimeofday(&cfp->last_recv_time, NULL);
 506                 return len;
 507         }
 508
 509         do {
 510 #ifndef __REACTOS__
 511                 pollfd.fd = sock;
 512                 pollfd.events = POLLIN;
 513                 pollfd.revents = 0;
 514                 switch (poll(&pollfd, 1, milliseconds)) {
 515 #else
 516                 /* ReactOS: use select instead of poll */
 517                 fd_set infd;
 518                 struct timeval timeout;
 519
 520                 FD_ZERO(&infd);
 521                 FD_SET(sock, &infd);
 522
 523                 timeout.tv_sec = 0;
 524                 timeout.tv_usec = milliseconds * 1000;
 525
 526                 switch (select(0, &infd, NULL, NULL, &timeout)) {
 527 #endif
 528                 case -1:
 529                         if (errno == EINTR)
 530                                 continue;
 531                         /*FALLTHROUGH*/
 532                 case 0:
 533                         goto fatal_err;
 534
 535                 default:
 536                         break;
 537                 }
 538 #ifndef __REACTOS__
 539         } while ((pollfd.revents & POLLIN) == 0);
 540 #else
 541         } while (TRUE);
 542 #endif
 543
 544 #ifdef _WIN32
 545         if ((len = recv(sock, buf, (size_t)len, 0)) > 0) {
 546 #else
 547         if ((len = read(sock, buf, (size_t)len)) > 0) {
 548 #endif
 549                 gettimeofday(&cfp->last_recv_time, NULL);
 550                 return (len);
 551         }
 552
 553 fatal_err:
 554         ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
 555         return (-1);
 556 }
 557
 558 /*
 559  * writes data to the tcp connection.
 560  * Any error is fatal and the connection is closed.
 561  */
 562 static int
 563 #ifdef __REACTOS__
 564 write_vc(xprtp, ptr, len)
 565 #else
 566 write_vc(xprtp, buf, len)
 567 #endif
 568         void *xprtp;
 569 #ifdef __REACTOS__
 570     void *ptr;
 571 #else
 572         char *buf;
 573 #endif
 574         int len;
 575 {
 576         SVCXPRT *xprt;
 577         int i, cnt;
 578         struct cf_conn *cd;
 579         struct timeval tv0, tv1;
 580 #ifdef __REACTOS__
 581     char *buf = ptr;
 582 #endif
 583
 584         xprt = (SVCXPRT *)xprtp;
 585         assert(xprt != NULL);
 586
 587         cd = (struct cf_conn *)xprt->xp_p1;
 588
 589         if (cd->nonblock)
 590                 gettimeofday(&tv0, NULL);
 591
 592         for (cnt = len; cnt > 0; cnt -= i, buf += i) {
 593 #ifdef _WIN32
 594                 i = send(xprt->xp_fd, buf, (size_t)cnt, 0);
 595 #else
 596                 i = write(xprt->xp_fd, buf, (size_t)cnt);
 597 #endif
 598                 if (i == SOCKET_ERROR) {
 599                         if (WSAGetLastError() != EAGAIN || !cd->nonblock) {
 600                                 cd->strm_stat = XPRT_DIED;
 601                                 return (-1);
 602                         }
 603                         if (cd->nonblock && i != cnt) {
 604                                 /*
 605                                  * For non-blocking connections, do not
 606                                  * take more than 2 seconds writing the
 607                                  * data out.
 608                                  *
 609                                  * XXX 2 is an arbitrary amount.
 610                                  */
 611                                 gettimeofday(&tv1, NULL);
 612                                 if (tv1.tv_sec - tv0.tv_sec >= 2) {
 613                                         cd->strm_stat = XPRT_DIED;
 614                                         return (-1);
 615                                 }
 616                         }
 617                 }
 618         }
 619
 620         return (len);
 621 }
 622
 623 static enum xprt_stat
 624 svc_vc_stat(xprt)
 625         SVCXPRT *xprt;
 626 {
 627         struct cf_conn *cd;
 628
 629         assert(xprt != NULL);
 630
 631         cd = (struct cf_conn *)(xprt->xp_p1);
 632
 633         if (cd->strm_stat == XPRT_DIED)
 634                 return (XPRT_DIED);
 635         if (! xdrrec_eof(&(cd->xdrs)))
 636                 return (XPRT_MOREREQS);
 637         return (XPRT_IDLE);
 638 }
 639
 640 static bool_t
 641 svc_vc_recv(xprt, msg)
 642         SVCXPRT *xprt;
 643         struct rpc_msg *msg;
 644 {
 645         struct cf_conn *cd;
 646         XDR *xdrs;
 647
 648         assert(xprt != NULL);
 649         assert(msg != NULL);
 650
 651         cd = (struct cf_conn *)(xprt->xp_p1);
 652         xdrs = &(cd->xdrs);
 653
 654         if (cd->nonblock) {
 655                 if (!__xdrrec_getrec(xdrs, &cd->strm_stat, TRUE))
 656                         return FALSE;
 657         }
 658
 659         xdrs->x_op = XDR_DECODE;
 660         (void)xdrrec_skiprecord(xdrs);
 661         if (xdr_callmsg(xdrs, msg)) {
 662                 cd->x_id = msg->rm_xid;
 663                 return (TRUE);
 664         }
 665         cd->strm_stat = XPRT_DIED;
 666         return (FALSE);
 667 }
 668
 669 static bool_t
 670 svc_vc_getargs(xprt, xdr_args, args_ptr)
 671         SVCXPRT *xprt;
 672         xdrproc_t xdr_args;
 673         void *args_ptr;
 674 {
 675
 676         assert(xprt != NULL);
 677         /* args_ptr may be NULL */
 678         return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
 679             args_ptr));
 680 }
 681
 682 static bool_t
 683 svc_vc_freeargs(xprt, xdr_args, args_ptr)
 684         SVCXPRT *xprt;
 685         xdrproc_t xdr_args;
 686         void *args_ptr;
 687 {
 688         XDR *xdrs;
 689
 690         assert(xprt != NULL);
 691         /* args_ptr may be NULL */
 692
 693         xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
 694
 695         xdrs->x_op = XDR_FREE;
 696         return ((*xdr_args)(xdrs, args_ptr));
 697 }
 698
 699 static bool_t
 700 svc_vc_reply(xprt, msg)
 701         SVCXPRT *xprt;
 702         struct rpc_msg *msg;
 703 {
 704         struct cf_conn *cd;
 705         XDR *xdrs;
 706         bool_t rstat;
 707
 708         assert(xprt != NULL);
 709         assert(msg != NULL);
 710
 711         cd = (struct cf_conn *)(xprt->xp_p1);
 712         xdrs = &(cd->xdrs);
 713
 714         xdrs->x_op = XDR_ENCODE;
 715         msg->rm_xid = cd->x_id;
 716         rstat = xdr_replymsg(xdrs, msg);
 717         (void)xdrrec_endofrecord(xdrs, TRUE);
 718         return (rstat);
 719 }
 720
 721 static void
 722 svc_vc_ops(xprt)
 723         SVCXPRT *xprt;
 724 {
 725         static struct xp_ops ops;
 726         static struct xp_ops2 ops2;
 727         extern mutex_t ops_lock;
 728
 729 /* VARIABLES PROTECTED BY ops_lock: ops, ops2 */
 730
 731         mutex_lock(&ops_lock);
 732         if (ops.xp_recv == NULL) {
 733                 ops.xp_recv = svc_vc_recv;
 734                 ops.xp_stat = svc_vc_stat;
 735                 ops.xp_getargs = svc_vc_getargs;
 736                 ops.xp_reply = svc_vc_reply;
 737                 ops.xp_freeargs = svc_vc_freeargs;
 738                 ops.xp_destroy = svc_vc_destroy;
 739                 ops2.xp_control = svc_vc_control;
 740         }
 741         xprt->xp_ops = &ops;
 742         xprt->xp_ops2 = &ops2;
 743         mutex_unlock(&ops_lock);
 744 }
 745
 746 static void
 747 svc_vc_rendezvous_ops(xprt)
 748         SVCXPRT *xprt;
 749 {
 750         static struct xp_ops ops;
 751         static struct xp_ops2 ops2;
 752         extern mutex_t ops_lock;
 753
 754         mutex_lock(&ops_lock);
 755         if (ops.xp_recv == NULL) {
 756                 ops.xp_recv = rendezvous_request;
 757                 ops.xp_stat = rendezvous_stat;
 758                 ops.xp_getargs =
 759                     (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort;
 760                 ops.xp_reply =
 761                     (bool_t (*)(SVCXPRT *, struct rpc_msg *))abort;
 762                 ops.xp_freeargs =
 763                     (bool_t (*)(SVCXPRT *, xdrproc_t, void *))abort,
 764                 ops.xp_destroy = svc_vc_destroy;
 765                 ops2.xp_control = svc_vc_rendezvous_control;
 766         }
 767         xprt->xp_ops = &ops;
 768         xprt->xp_ops2 = &ops2;
 769         mutex_unlock(&ops_lock);
 770 }
 771
 772 /*
 773  * Get the effective UID of the sending process. Used by rpcbind, keyserv
 774  * and rpc.yppasswdd on AF_LOCAL.
 775  */
 776 int
 777 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) {
 778         SOCKET sock;
 779         int ret;
 780         gid_t egid;
 781         uid_t euid;
 782         struct sockaddr *sa;
 783
 784         sock = transp->xp_fd;
 785         sa = (struct sockaddr *)transp->xp_rtaddr.buf;
 786         if (sa->sa_family == AF_UNIX) {
 787                 ret = getpeereid(sock, &euid, &egid);
 788                 if (ret == 0)
 789                         *uid = euid;
 790                 return (ret);
 791         } else
 792                 return (-1);
 793 }
 794
 795 #ifdef _WIN32
 796 void timersub( const struct timeval *tvp, const struct timeval *uvp, struct timeval *vvp )
 797 {
 798     vvp->tv_sec = tvp->tv_sec - uvp->tv_sec;
 799     vvp->tv_usec = tvp->tv_usec - uvp->tv_usec;
 800     if( vvp->tv_usec < 0 )
 801     {
 802        --vvp->tv_sec;
 803        vvp->tv_usec += 1000000;
 804     }
 805 }
 806 #endif
 807
 808 /*
 809  * Destroy xprts that have not have had any activity in 'timeout' seconds.
 810  * If 'cleanblock' is true, blocking connections (the default) are also
 811  * cleaned. If timeout is 0, the least active connection is picked.
 812  */
 813 bool_t
 814 __svc_clean_idle(fd_set *fds, int timeout, bool_t cleanblock)
 815 {
 816         int i, ncleaned;
 817         SVCXPRT *xprt, *least_active;
 818         struct timeval tv, tdiff, tmax;
 819         struct cf_conn *cd;
 820
 821         gettimeofday(&tv, NULL);
 822         tmax.tv_sec = tmax.tv_usec = 0;
 823         least_active = NULL;
 824         rwlock_wrlock(&svc_fd_lock);
 825         for (i = ncleaned = 0; i <= svc_maxfd; i++) {
 826                 if (FD_ISSET(i, fds)) {
 827                         xprt = __svc_xports[i];
 828                         if (xprt == NULL || xprt->xp_ops == NULL ||
 829                             xprt->xp_ops->xp_recv != svc_vc_recv)
 830                                 continue;
 831                         cd = (struct cf_conn *)xprt->xp_p1;
 832                         if (!cleanblock && !cd->nonblock)
 833                                 continue;
 834                         if (timeout == 0) {
 835                                 timersub(&tv, &cd->last_recv_time, &tdiff);
 836                                 if (timercmp(&tdiff, &tmax, >)) {
 837                                         tmax = tdiff;
 838                                         least_active = xprt;
 839                                 }
 840                                 continue;
 841                         }
 842                         if (tv.tv_sec - cd->last_recv_time.tv_sec > timeout) {
 843                                 __xprt_unregister_unlocked(xprt);
 844                                 __svc_vc_dodestroy(xprt);
 845                                 ncleaned++;
 846                         }
 847                 }
 848         }
 849         if (timeout == 0 && least_active != NULL) {
 850                 __xprt_unregister_unlocked(least_active);
 851                 __svc_vc_dodestroy(least_active);
 852                 ncleaned++;
 853         }
 854         rwlock_unlock(&svc_fd_lock);
 855         return ncleaned > 0 ? TRUE : FALSE;
 856 }