lib/libc/rpc/svc_vc.c

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