sunrpc/clnt_udp.c

   1 /*
   2  * clnt_udp.c, Implements a UDP/IP based, client side RPC.
   3  *
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above
  13  *       copyright notice, this list of conditions and the following
  14  *       disclaimer in the documentation and/or other materials
  15  *       provided with the distribution.
  16  *     * Neither the name of the "Oracle America, Inc." nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  27  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdio.h>
  35 #include <unistd.h>
  36 #include <libintl.h>
  37 #include <rpc/rpc.h>
  38 #include <rpc/xdr.h>
  39 #include <rpc/clnt.h>
  40 #include <sys/poll.h>
  41 #include <sys/socket.h>
  42 #include <sys/ioctl.h>
  43 #include <netdb.h>
  44 #include <errno.h>
  45 #include <stdint.h>
  46 #include <rpc/pmap_clnt.h>
  47 #include <net/if.h>
  48 #include <ifaddrs.h>
  49 #include <wchar.h>
  50 #include <fcntl.h>
  51
  52 #ifdef IP_RECVERR
  53 #include <errqueue.h>
  54 #include <sys/uio.h>
  55 #endif
  56
  57 #include <kernel-features.h>
  58 #include <inet/net-internal.h>
  59
  60 extern u_long _create_xid (void);
  61
  62 /*
  63  * UDP bases client side rpc operations
  64  */
  65 static enum clnt_stat clntudp_call (CLIENT *, u_long, xdrproc_t, caddr_t,
  66                                     xdrproc_t, caddr_t, struct timeval);
  67 static void clntudp_abort (void);
  68 static void clntudp_geterr (CLIENT *, struct rpc_err *);
  69 static bool_t clntudp_freeres (CLIENT *, xdrproc_t, caddr_t);
  70 static bool_t clntudp_control (CLIENT *, int, char *);
  71 static void clntudp_destroy (CLIENT *);
  72
  73 static const struct clnt_ops udp_ops =
  74 {
  75   clntudp_call,
  76   clntudp_abort,
  77   clntudp_geterr,
  78   clntudp_freeres,
  79   clntudp_destroy,
  80   clntudp_control
  81 };
  82
  83 /*
  84  * Private data kept per client handle.  This private struct is
  85  * unfortunately part of the ABI; ypbind contains a copy of it and
  86  * accesses it through CLIENT::cl_private field.
  87  */
  88 struct cu_data
  89   {
  90     int cu_sock;
  91     bool_t cu_closeit;
  92     struct sockaddr_in cu_raddr;
  93     int cu_rlen;
  94     struct timeval cu_wait;
  95     struct timeval cu_total;
  96     struct rpc_err cu_error;
  97     XDR cu_outxdrs;
  98     u_int cu_xdrpos;
  99     u_int cu_sendsz;
 100     char *cu_outbuf;
 101     u_int cu_recvsz;
 102     char cu_inbuf[1];
 103   };
 104
 105 /*
 106  * Create a UDP based client handle.
 107  * If *sockp<0, *sockp is set to a newly created UPD socket.
 108  * If raddr->sin_port is 0 a binder on the remote machine
 109  * is consulted for the correct port number.
 110  * NB: It is the clients responsibility to close *sockp.
 111  * NB: The rpch->cl_auth is initialized to null authentication.
 112  *     Caller may wish to set this something more useful.
 113  *
 114  * wait is the amount of time used between retransmitting a call if
 115  * no response has been heard; retransmission occurs until the actual
 116  * rpc call times out.
 117  *
 118  * sendsz and recvsz are the maximum allowable packet sizes that can be
 119  * sent and received.
 120  */
 121 CLIENT *
 122 __libc_clntudp_bufcreate (struct sockaddr_in *raddr, u_long program,
 123                           u_long version, struct timeval wait, int *sockp,
 124                           u_int sendsz, u_int recvsz, int flags)
 125 {
 126   CLIENT *cl;
 127   struct cu_data *cu = NULL;
 128   struct rpc_msg call_msg;
 129
 130   cl = (CLIENT *) mem_alloc (sizeof (CLIENT));
 131   sendsz = ((sendsz + 3) / 4) * 4;
 132   recvsz = ((recvsz + 3) / 4) * 4;
 133   cu = (struct cu_data *) mem_alloc (sizeof (*cu) + sendsz + recvsz);
 134   if (cl == NULL || cu == NULL)
 135     {
 136       struct rpc_createerr *ce = &get_rpc_createerr ();
 137       (void) __fxprintf (NULL, "%s: %s",
 138                          "clntudp_create", _("out of memory\n"));
 139       ce->cf_stat = RPC_SYSTEMERROR;
 140       ce->cf_error.re_errno = ENOMEM;
 141       goto fooy;
 142     }
 143   cu->cu_outbuf = &cu->cu_inbuf[recvsz];
 144
 145   if (raddr->sin_port == 0)
 146     {
 147       u_short port;
 148       if ((port =
 149            pmap_getport (raddr, program, version, IPPROTO_UDP)) == 0)
 150         {
 151           goto fooy;
 152         }
 153       raddr->sin_port = htons (port);
 154     }
 155   cl->cl_ops = (struct clnt_ops *) &udp_ops;
 156   cl->cl_private = (caddr_t) cu;
 157   cu->cu_raddr = *raddr;
 158   cu->cu_rlen = sizeof (cu->cu_raddr);
 159   cu->cu_wait = wait;
 160   cu->cu_total.tv_sec = -1;
 161   cu->cu_total.tv_usec = -1;
 162   cu->cu_sendsz = sendsz;
 163   cu->cu_recvsz = recvsz;
 164   call_msg.rm_xid = _create_xid ();
 165   call_msg.rm_direction = CALL;
 166   call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
 167   call_msg.rm_call.cb_prog = program;
 168   call_msg.rm_call.cb_vers = version;
 169   xdrmem_create (&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, XDR_ENCODE);
 170   if (!xdr_callhdr (&(cu->cu_outxdrs), &call_msg))
 171     {
 172       goto fooy;
 173     }
 174   cu->cu_xdrpos = XDR_GETPOS (&(cu->cu_outxdrs));
 175   if (*sockp < 0)
 176     {
 177       *sockp = __socket (AF_INET, SOCK_DGRAM|SOCK_NONBLOCK|flags, IPPROTO_UDP);
 178       if (__glibc_unlikely (*sockp < 0))
 179         {
 180           struct rpc_createerr *ce = &get_rpc_createerr ();
 181           ce->cf_stat = RPC_SYSTEMERROR;
 182           ce->cf_error.re_errno = errno;
 183           goto fooy;
 184         }
 185       /* attempt to bind to prov port */
 186       (void) bindresvport (*sockp, (struct sockaddr_in *) 0);
 187 #ifdef IP_RECVERR
 188       {
 189         int on = 1;
 190         __setsockopt (*sockp, SOL_IP, IP_RECVERR, &on, sizeof(on));
 191       }
 192 #endif
 193       cu->cu_closeit = TRUE;
 194     }
 195   else
 196     {
 197       cu->cu_closeit = FALSE;
 198     }
 199   cu->cu_sock = *sockp;
 200   cl->cl_auth = authnone_create ();
 201   return cl;
 202 fooy:
 203   if (cu)
 204     mem_free ((caddr_t) cu, sizeof (*cu) + sendsz + recvsz);
 205   if (cl)
 206     mem_free ((caddr_t) cl, sizeof (CLIENT));
 207   return (CLIENT *) NULL;
 208 }
 209 #ifdef EXPORT_RPC_SYMBOLS
 210 libc_hidden_def (__libc_clntudp_bufcreate)
 211 #else
 212 libc_hidden_nolink_sunrpc (__libc_clntudp_bufcreate, GLIBC_PRIVATE)
 213 #endif
 214
 215 CLIENT *
 216 clntudp_bufcreate (struct sockaddr_in *raddr, u_long program, u_long version,
 217                    struct timeval wait, int *sockp, u_int sendsz,
 218                    u_int recvsz)
 219 {
 220   return __libc_clntudp_bufcreate (raddr, program, version, wait,
 221                                    sockp, sendsz, recvsz, 0);
 222 }
 223 libc_hidden_nolink_sunrpc (clntudp_bufcreate, GLIBC_2_0)
 224
 225 CLIENT *
 226 clntudp_create (struct sockaddr_in *raddr, u_long program, u_long version,
 227                 struct timeval wait, int *sockp)
 228 {
 229   return __libc_clntudp_bufcreate (raddr, program, version, wait,
 230                                    sockp, UDPMSGSIZE, UDPMSGSIZE, 0);
 231 }
 232 #ifdef EXPORT_RPC_SYMBOLS
 233 libc_hidden_def (clntudp_create)
 234 #else
 235 libc_hidden_nolink_sunrpc (clntudp_create, GLIBC_2_0)
 236 #endif
 237
 238 static int
 239 is_network_up (int sock)
 240 {
 241   struct ifaddrs *ifa;
 242
 243   if (getifaddrs (&ifa) != 0)
 244     return 0;
 245
 246   struct ifaddrs *run = ifa;
 247   while (run != NULL)
 248     {
 249       if ((run->ifa_flags & IFF_UP) != 0
 250           && run->ifa_addr != NULL
 251           && run->ifa_addr->sa_family == AF_INET)
 252         break;
 253
 254       run = run->ifa_next;
 255     }
 256
 257   freeifaddrs (ifa);
 258
 259   return run != NULL;
 260 }
 261
 262 static enum clnt_stat
 263 clntudp_call (/* client handle */
 264               CLIENT *cl,
 265               /* procedure number */
 266               u_long proc,
 267               /* xdr routine for args */
 268               xdrproc_t xargs,
 269               /* pointer to args */
 270               caddr_t argsp,
 271               /* xdr routine for results */
 272               xdrproc_t xresults,
 273               /* pointer to results */
 274               caddr_t resultsp,
 275               /* seconds to wait before giving up */
 276               struct timeval utimeout)
 277 {
 278   struct cu_data *cu = (struct cu_data *) cl->cl_private;
 279   XDR *xdrs;
 280   int outlen = 0;
 281   int inlen;
 282   socklen_t fromlen;
 283   struct pollfd fd;
 284   struct sockaddr_in from;
 285   struct rpc_msg reply_msg;
 286   XDR reply_xdrs;
 287   bool_t ok;
 288   int nrefreshes = 2;           /* number of times to refresh cred */
 289   int anyup;                    /* any network interface up */
 290
 291   struct deadline_current_time current_time = __deadline_current_time ();
 292   struct deadline total_deadline; /* Determined once by overall timeout.  */
 293   struct deadline response_deadline; /* Determined anew for each query.  */
 294
 295   /* Choose the timeout value.  For non-sending usage (xargs == NULL),
 296      the total deadline does not matter, only cu->cu_wait is used
 297      below.  */
 298   if (xargs != NULL)
 299     {
 300       struct timeval tv;
 301       if (cu->cu_total.tv_usec == -1)
 302         /* Use supplied timeout.  */
 303         tv = utimeout;
 304       else
 305         /* Use default timeout.  */
 306         tv = cu->cu_total;
 307       if (!__is_timeval_valid_timeout (tv))
 308         return (cu->cu_error.re_status = RPC_TIMEDOUT);
 309       total_deadline = __deadline_from_timeval (current_time, tv);
 310     }
 311
 312   /* Guard against bad timeout specification.  */
 313   if (!__is_timeval_valid_timeout (cu->cu_wait))
 314     return (cu->cu_error.re_status = RPC_TIMEDOUT);
 315
 316 call_again:
 317   xdrs = &(cu->cu_outxdrs);
 318   if (xargs == NULL)
 319     goto get_reply;
 320   xdrs->x_op = XDR_ENCODE;
 321   XDR_SETPOS (xdrs, cu->cu_xdrpos);
 322   /*
 323    * the transaction is the first thing in the out buffer
 324    */
 325   (*(uint32_t *) (cu->cu_outbuf))++;
 326   if ((!XDR_PUTLONG (xdrs, (long *) &proc)) ||
 327       (!AUTH_MARSHALL (cl->cl_auth, xdrs)) ||
 328       (!(*xargs) (xdrs, argsp)))
 329     return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
 330   outlen = (int) XDR_GETPOS (xdrs);
 331
 332 send_again:
 333   if (__sendto (cu->cu_sock, cu->cu_outbuf, outlen, 0,
 334                 (struct sockaddr *) &(cu->cu_raddr), cu->cu_rlen)
 335       != outlen)
 336     {
 337       cu->cu_error.re_errno = errno;
 338       return (cu->cu_error.re_status = RPC_CANTSEND);
 339     }
 340
 341   /* sendto may have blocked, so recompute the current time.  */
 342   current_time = __deadline_current_time ();
 343  get_reply:
 344   response_deadline = __deadline_from_timeval (current_time, cu->cu_wait);
 345
 346   reply_msg.acpted_rply.ar_verf = _null_auth;
 347   reply_msg.acpted_rply.ar_results.where = resultsp;
 348   reply_msg.acpted_rply.ar_results.proc = xresults;
 349   fd.fd = cu->cu_sock;
 350   fd.events = POLLIN;
 351   anyup = 0;
 352
 353   /* Per-response retry loop.  current_time must be up-to-date at the
 354      top of the loop.  */
 355   for (;;)
 356     {
 357       int milliseconds;
 358       if (xargs != NULL)
 359         {
 360           if (__deadline_elapsed (current_time, total_deadline))
 361             /* Overall timeout expired.  */
 362             return (cu->cu_error.re_status = RPC_TIMEDOUT);
 363           milliseconds = __deadline_to_ms
 364             (current_time, __deadline_first (total_deadline,
 365                                              response_deadline));
 366           if (milliseconds == 0)
 367             /* Per-query timeout expired.  */
 368             goto send_again;
 369         }
 370       else
 371         {
 372           /* xatgs == NULL.  Collect a response without sending a
 373              query.  In this mode, we need to ignore the total
 374              deadline.  */
 375           milliseconds = __deadline_to_ms (current_time, response_deadline);
 376           if (milliseconds == 0)
 377             /* Cannot send again, so bail out.  */
 378             return (cu->cu_error.re_status = RPC_CANTSEND);
 379         }
 380
 381       switch (__poll (&fd, 1, milliseconds))
 382         {
 383
 384         case 0:
 385           if (anyup == 0)
 386             {
 387               anyup = is_network_up (cu->cu_sock);
 388               if (!anyup)
 389                 return (cu->cu_error.re_status = RPC_CANTRECV);
 390             }
 391           goto next_response;
 392         case -1:
 393           if (errno == EINTR)
 394             goto next_response;
 395           cu->cu_error.re_errno = errno;
 396           return (cu->cu_error.re_status = RPC_CANTRECV);
 397         }
 398 #ifdef IP_RECVERR
 399       if (fd.revents & POLLERR)
 400         {
 401           struct msghdr msg;
 402           struct cmsghdr *cmsg;
 403           struct sock_extended_err *e;
 404           struct sockaddr_in err_addr;
 405           struct iovec iov;
 406           char *cbuf = malloc (outlen + 256);
 407           int ret;
 408
 409           if (cbuf == NULL)
 410             {
 411               cu->cu_error.re_errno = errno;
 412               return (cu->cu_error.re_status = RPC_CANTRECV);
 413             }
 414
 415           iov.iov_base = cbuf + 256;
 416           iov.iov_len = outlen;
 417           msg.msg_name = (void *) &err_addr;
 418           msg.msg_namelen = sizeof (err_addr);
 419           msg.msg_iov = &iov;
 420           msg.msg_iovlen = 1;
 421           msg.msg_flags = 0;
 422           msg.msg_control = cbuf;
 423           msg.msg_controllen = 256;
 424           ret = __recvmsg (cu->cu_sock, &msg, MSG_ERRQUEUE);
 425           if (ret >= 0
 426               && memcmp (cbuf + 256, cu->cu_outbuf, ret) == 0
 427               && (msg.msg_flags & MSG_ERRQUEUE)
 428               && ((msg.msg_namelen == 0
 429                    && ret >= 12)
 430                   || (msg.msg_namelen == sizeof (err_addr)
 431                       && err_addr.sin_family == AF_INET
 432                       && memcmp (&err_addr.sin_addr, &cu->cu_raddr.sin_addr,
 433                                  sizeof (err_addr.sin_addr)) == 0
 434                       && err_addr.sin_port == cu->cu_raddr.sin_port)))
 435             for (cmsg = CMSG_FIRSTHDR (&msg); cmsg;
 436                  cmsg = CMSG_NXTHDR (&msg, cmsg))
 437               if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR)
 438                 {
 439                   e = (struct sock_extended_err *) CMSG_DATA(cmsg);
 440                   cu->cu_error.re_errno = e->ee_errno;
 441                   free (cbuf);
 442                   return (cu->cu_error.re_status = RPC_CANTRECV);
 443                 }
 444           free (cbuf);
 445         }
 446 #endif
 447       do
 448         {
 449           fromlen = sizeof (struct sockaddr);
 450           inlen = __recvfrom (cu->cu_sock, cu->cu_inbuf,
 451                               (int) cu->cu_recvsz, MSG_DONTWAIT,
 452                               (struct sockaddr *) &from, &fromlen);
 453         }
 454       while (inlen < 0 && errno == EINTR);
 455       if (inlen < 0)
 456         {
 457           if (errno == EWOULDBLOCK)
 458             goto next_response;
 459           cu->cu_error.re_errno = errno;
 460           return (cu->cu_error.re_status = RPC_CANTRECV);
 461         }
 462       /* Accept the response if the packet is sufficiently long and
 463          the transaction ID matches the query (if available).  */
 464       if (inlen >= 4
 465           && (xargs == NULL
 466               || memcmp (cu->cu_inbuf, cu->cu_outbuf,
 467                          sizeof (u_int32_t)) == 0))
 468         break;
 469
 470     next_response:
 471       /* Update the current time because poll and recvmsg waited for
 472          an unknown time.  */
 473       current_time = __deadline_current_time ();
 474     }
 475
 476   /*
 477    * now decode and validate the response
 478    */
 479   xdrmem_create (&reply_xdrs, cu->cu_inbuf, (u_int) inlen, XDR_DECODE);
 480   ok = xdr_replymsg (&reply_xdrs, &reply_msg);
 481   /* XDR_DESTROY(&reply_xdrs);  save a few cycles on noop destroy */
 482   if (ok)
 483     {
 484       _seterr_reply (&reply_msg, &(cu->cu_error));
 485       if (cu->cu_error.re_status == RPC_SUCCESS)
 486         {
 487           if (!AUTH_VALIDATE (cl->cl_auth,
 488                               &reply_msg.acpted_rply.ar_verf))
 489             {
 490               cu->cu_error.re_status = RPC_AUTHERROR;
 491               cu->cu_error.re_why = AUTH_INVALIDRESP;
 492             }
 493           if (reply_msg.acpted_rply.ar_verf.oa_base != NULL)
 494             {
 495               xdrs->x_op = XDR_FREE;
 496               (void) xdr_opaque_auth (xdrs, &(reply_msg.acpted_rply.ar_verf));
 497             }
 498         }                       /* end successful completion */
 499       else
 500         {
 501           /* maybe our credentials need to be refreshed ... */
 502           if (nrefreshes > 0 && AUTH_REFRESH (cl->cl_auth))
 503             {
 504               nrefreshes--;
 505               goto call_again;
 506             }
 507         }                       /* end of unsuccessful completion */
 508     }                           /* end of valid reply message */
 509   else
 510     {
 511       cu->cu_error.re_status = RPC_CANTDECODERES;
 512     }
 513   return cu->cu_error.re_status;
 514 }
 515
 516 static void
 517 clntudp_geterr (CLIENT *cl, struct rpc_err *errp)
 518 {
 519   struct cu_data *cu = (struct cu_data *) cl->cl_private;
 520
 521   *errp = cu->cu_error;
 522 }
 523
 524
 525 static bool_t
 526 clntudp_freeres (CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
 527 {
 528   struct cu_data *cu = (struct cu_data *) cl->cl_private;
 529   XDR *xdrs = &(cu->cu_outxdrs);
 530
 531   xdrs->x_op = XDR_FREE;
 532   return (*xdr_res) (xdrs, res_ptr);
 533 }
 534
 535 static void
 536 clntudp_abort (void)
 537 {
 538 }
 539
 540 static bool_t
 541 clntudp_control (CLIENT *cl, int request, char *info)
 542 {
 543   struct cu_data *cu = (struct cu_data *) cl->cl_private;
 544   u_long ul;
 545   u_int32_t ui32;
 546
 547   switch (request)
 548     {
 549     case CLSET_FD_CLOSE:
 550       cu->cu_closeit = TRUE;
 551       break;
 552     case CLSET_FD_NCLOSE:
 553       cu->cu_closeit = FALSE;
 554       break;
 555     case CLSET_TIMEOUT:
 556       cu->cu_total = *(struct timeval *) info;
 557       break;
 558     case CLGET_TIMEOUT:
 559       *(struct timeval *) info = cu->cu_total;
 560       break;
 561     case CLSET_RETRY_TIMEOUT:
 562       cu->cu_wait = *(struct timeval *) info;
 563       break;
 564     case CLGET_RETRY_TIMEOUT:
 565       *(struct timeval *) info = cu->cu_wait;
 566       break;
 567     case CLGET_SERVER_ADDR:
 568       *(struct sockaddr_in *) info = cu->cu_raddr;
 569       break;
 570     case CLGET_FD:
 571       *(int *)info = cu->cu_sock;
 572       break;
 573     case CLGET_XID:
 574       /*
 575        * use the knowledge that xid is the
 576        * first element in the call structure *.
 577        * This will get the xid of the PREVIOUS call
 578        */
 579       memcpy (&ui32, cu->cu_outbuf, sizeof (ui32));
 580       ul = ntohl (ui32);
 581       memcpy (info, &ul, sizeof (ul));
 582       break;
 583     case CLSET_XID:
 584       /* This will set the xid of the NEXT call */
 585       memcpy (&ul, info, sizeof (ul));
 586       ui32 = htonl (ul - 1);
 587       memcpy (cu->cu_outbuf, &ui32, sizeof (ui32));
 588       /* decrement by 1 as clntudp_call() increments once */
 589       break;
 590     case CLGET_VERS:
 591       /*
 592        * This RELIES on the information that, in the call body,
 593        * the version number field is the fifth field from the
 594        * beginning of the RPC header. MUST be changed if the
 595        * call_struct is changed
 596        */
 597       memcpy (&ui32, cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT, sizeof (ui32));
 598       ul = ntohl (ui32);
 599       memcpy (info, &ul, sizeof (ul));
 600       break;
 601     case CLSET_VERS:
 602       memcpy (&ul, info, sizeof (ul));
 603       ui32 = htonl (ul);
 604       memcpy (cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32));
 605       break;
 606     case CLGET_PROG:
 607       /*
 608        * This RELIES on the information that, in the call body,
 609        * the program number field is the  field from the
 610        * beginning of the RPC header. MUST be changed if the
 611        * call_struct is changed
 612        */
 613       memcpy (&ui32, cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT, sizeof (ui32));
 614       ul = ntohl (ui32);
 615       memcpy (info, &ul, sizeof (ul));
 616       break;
 617     case CLSET_PROG:
 618       memcpy (&ul, info, sizeof (ul));
 619       ui32 = htonl (ul);
 620       memcpy (cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT, &ui32, sizeof (ui32));
 621       break;
 622     /* The following are only possible with TI-RPC */
 623     case CLGET_SVC_ADDR:
 624     case CLSET_SVC_ADDR:
 625     case CLSET_PUSH_TIMOD:
 626     case CLSET_POP_TIMOD:
 627     default:
 628       return FALSE;
 629     }
 630   return TRUE;
 631 }
 632
 633 static void
 634 clntudp_destroy (CLIENT *cl)
 635 {
 636   struct cu_data *cu = (struct cu_data *) cl->cl_private;
 637
 638   if (cu->cu_closeit)
 639     {
 640       (void) __close (cu->cu_sock);
 641     }
 642   XDR_DESTROY (&(cu->cu_outxdrs));
 643   mem_free ((caddr_t) cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz));
 644   mem_free ((caddr_t) cl, sizeof (CLIENT));
 645 }