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  */
  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 }