sunrpc/clnt_raw.c

   1 /*
   2  * clnt_raw.c
   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  * Memory based rpc for simple testing and timing.
  34  * Interface to create an rpc client and server in the same process.
  35  * This lets us simulate rpc and get round trip overhead, without
  36  * any interference from the kernel.
  37  */
  38
  39 #include <rpc/rpc.h>
  40 #include <rpc/svc.h>
  41 #include <rpc/xdr.h>
  42 #include <libintl.h>
  43
  44 #define MCALL_MSG_SIZE 24
  45
  46 /*
  47  * This is the "network" we will be moving stuff over.
  48  */
  49 struct clntraw_private_s
  50   {
  51     CLIENT client_object;
  52     XDR xdr_stream;
  53     char _raw_buf[UDPMSGSIZE];
  54     union
  55     {
  56       char msg[MCALL_MSG_SIZE];
  57       u_long rm_xid;
  58     } mashl_callmsg;
  59     u_int mcnt;
  60   };
  61 #ifdef _RPC_THREAD_SAFE_
  62 #define clntraw_private RPC_THREAD_VARIABLE(clntraw_private_s)
  63 #else
  64 static struct clntraw_private_s *clntraw_private;
  65 #endif
  66
  67 static enum clnt_stat clntraw_call (CLIENT *, u_long, xdrproc_t, caddr_t,
  68                                     xdrproc_t, caddr_t, struct timeval);
  69 static void clntraw_abort (void);
  70 static void clntraw_geterr (CLIENT *, struct rpc_err *);
  71 static bool_t clntraw_freeres (CLIENT *, xdrproc_t, caddr_t);
  72 static bool_t clntraw_control (CLIENT *, int, char *);
  73 static void clntraw_destroy (CLIENT *);
  74
  75 static const struct clnt_ops client_ops =
  76 {
  77   clntraw_call,
  78   clntraw_abort,
  79   clntraw_geterr,
  80   clntraw_freeres,
  81   clntraw_destroy,
  82   clntraw_control
  83 };
  84
  85 /*
  86  * Create a client handle for memory based rpc.
  87  */
  88 CLIENT *
  89 clntraw_create (u_long prog, u_long vers)
  90 {
  91   struct clntraw_private_s *clp = clntraw_private;
  92   struct rpc_msg call_msg;
  93   XDR *xdrs;
  94   CLIENT *client;
  95
  96   if (clp == 0)
  97     {
  98       clp = (struct clntraw_private_s *) calloc (1, sizeof (*clp));
  99       if (clp == 0)
 100         return (0);
 101       clntraw_private = clp;
 102     }
 103   xdrs = &clp->xdr_stream;
 104   client = &clp->client_object;
 105   /*
 106    * pre-serialize the static part of the call msg and stash it away
 107    */
 108   call_msg.rm_direction = CALL;
 109   call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
 110   call_msg.rm_call.cb_prog = prog;
 111   call_msg.rm_call.cb_vers = vers;
 112   xdrmem_create (xdrs, clp->mashl_callmsg.msg, MCALL_MSG_SIZE, XDR_ENCODE);
 113   if (!xdr_callhdr (xdrs, &call_msg))
 114     {
 115       perror (_ ("clnt_raw.c: fatal header serialization error"));
 116     }
 117   clp->mcnt = XDR_GETPOS (xdrs);
 118   XDR_DESTROY (xdrs);
 119
 120   /*
 121    * Set xdrmem for client/server shared buffer
 122    */
 123   xdrmem_create (xdrs, clp->_raw_buf, UDPMSGSIZE, XDR_FREE);
 124
 125   /*
 126    * create client handle
 127    */
 128   client->cl_ops = (struct clnt_ops *) &client_ops;
 129   client->cl_auth = authnone_create ();
 130   return client;
 131 }
 132 libc_hidden_nolink_sunrpc (clntraw_create, GLIBC_2_0)
 133
 134 static enum clnt_stat
 135 clntraw_call (CLIENT *h, u_long proc, xdrproc_t xargs, caddr_t argsp,
 136               xdrproc_t xresults, caddr_t resultsp, struct timeval timeout)
 137 {
 138   struct clntraw_private_s *clp = clntraw_private;
 139   XDR *xdrs = &clp->xdr_stream;
 140   struct rpc_msg msg;
 141   enum clnt_stat status;
 142   struct rpc_err error;
 143
 144   if (clp == NULL)
 145     return RPC_FAILED;
 146 call_again:
 147   /*
 148    * send request
 149    */
 150   xdrs->x_op = XDR_ENCODE;
 151   XDR_SETPOS (xdrs, 0);
 152   /* Just checking the union definition to access rm_xid is correct.  */
 153   if (offsetof (struct rpc_msg, rm_xid) != 0)
 154     abort ();
 155   clp->mashl_callmsg.rm_xid++;
 156   if ((!XDR_PUTBYTES (xdrs, clp->mashl_callmsg.msg, clp->mcnt)) ||
 157       (!XDR_PUTLONG (xdrs, (long *) &proc)) ||
 158       (!AUTH_MARSHALL (h->cl_auth, xdrs)) ||
 159       (!(*xargs) (xdrs, argsp)))
 160     {
 161       return (RPC_CANTENCODEARGS);
 162     }
 163   (void) XDR_GETPOS (xdrs);     /* called just to cause overhead */
 164
 165   /*
 166    * We have to call server input routine here because this is
 167    * all going on in one process. Yuk.
 168    */
 169   svc_getreq (1);
 170
 171   /*
 172    * get results
 173    */
 174   xdrs->x_op = XDR_DECODE;
 175   XDR_SETPOS (xdrs, 0);
 176   msg.acpted_rply.ar_verf = _null_auth;
 177   msg.acpted_rply.ar_results.where = resultsp;
 178   msg.acpted_rply.ar_results.proc = xresults;
 179   if (!xdr_replymsg (xdrs, &msg))
 180     return RPC_CANTDECODERES;
 181   _seterr_reply (&msg, &error);
 182   status = error.re_status;
 183
 184   if (status == RPC_SUCCESS)
 185     {
 186       if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
 187         {
 188           status = RPC_AUTHERROR;
 189         }
 190     }                           /* end successful completion */
 191   else
 192     {
 193       if (AUTH_REFRESH (h->cl_auth))
 194         goto call_again;
 195     }                           /* end of unsuccessful completion */
 196
 197   if (status == RPC_SUCCESS)
 198     {
 199       if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
 200         {
 201           status = RPC_AUTHERROR;
 202         }
 203       if (msg.acpted_rply.ar_verf.oa_base != NULL)
 204         {
 205           xdrs->x_op = XDR_FREE;
 206           (void) xdr_opaque_auth (xdrs, &(msg.acpted_rply.ar_verf));
 207         }
 208     }
 209
 210   return status;
 211 }
 212
 213 static void
 214 clntraw_geterr (CLIENT *cl, struct rpc_err *err)
 215 {
 216 }
 217
 218
 219 static bool_t
 220 clntraw_freeres (CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
 221 {
 222   struct clntraw_private_s *clp = clntraw_private;
 223   XDR *xdrs = &clp->xdr_stream;
 224   bool_t rval;
 225
 226   if (clp == NULL)
 227     {
 228       rval = (bool_t) RPC_FAILED;
 229       return rval;
 230     }
 231   xdrs->x_op = XDR_FREE;
 232   return (*xdr_res) (xdrs, res_ptr);
 233 }
 234
 235 static void
 236 clntraw_abort (void)
 237 {
 238 }
 239
 240 static bool_t
 241 clntraw_control (CLIENT *cl, int i, char *c)
 242 {
 243   return FALSE;
 244 }
 245
 246 static void
 247 clntraw_destroy (CLIENT *cl)
 248 {
 249 }