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 #include <shlib-compat.h>
  44
  45 #define MCALL_MSG_SIZE 24
  46
  47 /*
  48  * This is the "network" we will be moving stuff over.
  49  */
  50 struct clntraw_private_s
  51   {
  52     CLIENT client_object;
  53     XDR xdr_stream;
  54     char _raw_buf[UDPMSGSIZE];
  55     union
  56     {
  57       char msg[MCALL_MSG_SIZE];
  58       u_long rm_xid;
  59     } mashl_callmsg;
  60     u_int mcnt;
  61   };
  62 #ifdef _RPC_THREAD_SAFE_
  63 #define clntraw_private RPC_THREAD_VARIABLE(clntraw_private_s)
  64 #else
  65 static struct clntraw_private_s *clntraw_private;
  66 #endif
  67
  68 static enum clnt_stat clntraw_call (CLIENT *, u_long, xdrproc_t, caddr_t,
  69                                     xdrproc_t, caddr_t, struct timeval);
  70 static void clntraw_abort (void);
  71 static void clntraw_geterr (CLIENT *, struct rpc_err *);
  72 static bool_t clntraw_freeres (CLIENT *, xdrproc_t, caddr_t);
  73 static bool_t clntraw_control (CLIENT *, int, char *);
  74 static void clntraw_destroy (CLIENT *);
  75
  76 static const struct clnt_ops client_ops =
  77 {
  78   clntraw_call,
  79   clntraw_abort,
  80   clntraw_geterr,
  81   clntraw_freeres,
  82   clntraw_destroy,
  83   clntraw_control
  84 };
  85
  86 /*
  87  * Create a client handle for memory based rpc.
  88  */
  89 CLIENT *
  90 clntraw_create (u_long prog, u_long vers)
  91 {
  92   struct clntraw_private_s *clp = clntraw_private;
  93   struct rpc_msg call_msg;
  94   XDR *xdrs;
  95   CLIENT *client;
  96
  97   if (clp == 0)
  98     {
  99       clp = (struct clntraw_private_s *) calloc (1, sizeof (*clp));
 100       if (clp == 0)
 101         return (0);
 102       clntraw_private = clp;
 103     }
 104   xdrs = &clp->xdr_stream;
 105   client = &clp->client_object;
 106   /*
 107    * pre-serialize the static part of the call msg and stash it away
 108    */
 109   call_msg.rm_direction = CALL;
 110   call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
 111   call_msg.rm_call.cb_prog = prog;
 112   call_msg.rm_call.cb_vers = vers;
 113   xdrmem_create (xdrs, clp->mashl_callmsg.msg, MCALL_MSG_SIZE, XDR_ENCODE);
 114   if (!xdr_callhdr (xdrs, &call_msg))
 115     {
 116       perror (_ ("clnt_raw.c: fatal header serialization error"));
 117     }
 118   clp->mcnt = XDR_GETPOS (xdrs);
 119   XDR_DESTROY (xdrs);
 120
 121   /*
 122    * Set xdrmem for client/server shared buffer
 123    */
 124   xdrmem_create (xdrs, clp->_raw_buf, UDPMSGSIZE, XDR_FREE);
 125
 126   /*
 127    * create client handle
 128    */
 129   client->cl_ops = (struct clnt_ops *) &client_ops;
 130   client->cl_auth = authnone_create ();
 131   return client;
 132 }
 133 libc_hidden_nolink_sunrpc (clntraw_create, GLIBC_2_0)
 134
 135 static enum clnt_stat
 136 clntraw_call (CLIENT *h, u_long proc, xdrproc_t xargs, caddr_t argsp,
 137               xdrproc_t xresults, caddr_t resultsp, struct timeval timeout)
 138 {
 139   struct clntraw_private_s *clp = clntraw_private;
 140   XDR *xdrs = &clp->xdr_stream;
 141   struct rpc_msg msg;
 142   enum clnt_stat status;
 143   struct rpc_err error;
 144
 145   if (clp == NULL)
 146     return RPC_FAILED;
 147 call_again:
 148   /*
 149    * send request
 150    */
 151   xdrs->x_op = XDR_ENCODE;
 152   XDR_SETPOS (xdrs, 0);
 153   /* Just checking the union definition to access rm_xid is correct.  */
 154   if (offsetof (struct rpc_msg, rm_xid) != 0)
 155     abort ();
 156   clp->mashl_callmsg.rm_xid++;
 157   if ((!XDR_PUTBYTES (xdrs, clp->mashl_callmsg.msg, clp->mcnt)) ||
 158       (!XDR_PUTLONG (xdrs, (long *) &proc)) ||
 159       (!AUTH_MARSHALL (h->cl_auth, xdrs)) ||
 160       (!(*xargs) (xdrs, argsp)))
 161     {
 162       return (RPC_CANTENCODEARGS);
 163     }
 164   (void) XDR_GETPOS (xdrs);     /* called just to cause overhead */
 165
 166   /*
 167    * We have to call server input routine here because this is
 168    * all going on in one process. Yuk.
 169    */
 170   svc_getreq (1);
 171
 172   /*
 173    * get results
 174    */
 175   xdrs->x_op = XDR_DECODE;
 176   XDR_SETPOS (xdrs, 0);
 177   msg.acpted_rply.ar_verf = _null_auth;
 178   msg.acpted_rply.ar_results.where = resultsp;
 179   msg.acpted_rply.ar_results.proc = xresults;
 180   if (!xdr_replymsg (xdrs, &msg))
 181     return RPC_CANTDECODERES;
 182   _seterr_reply (&msg, &error);
 183   status = error.re_status;
 184
 185   if (status == RPC_SUCCESS)
 186     {
 187       if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
 188         {
 189           status = RPC_AUTHERROR;
 190         }
 191     }                           /* end successful completion */
 192   else
 193     {
 194       if (AUTH_REFRESH (h->cl_auth))
 195         goto call_again;
 196     }                           /* end of unsuccessful completion */
 197
 198   if (status == RPC_SUCCESS)
 199     {
 200       if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
 201         {
 202           status = RPC_AUTHERROR;
 203         }
 204       if (msg.acpted_rply.ar_verf.oa_base != NULL)
 205         {
 206           xdrs->x_op = XDR_FREE;
 207           (void) xdr_opaque_auth (xdrs, &(msg.acpted_rply.ar_verf));
 208         }
 209     }
 210
 211   return status;
 212 }
 213
 214 static void
 215 clntraw_geterr (CLIENT *cl, struct rpc_err *err)
 216 {
 217 }
 218
 219
 220 static bool_t
 221 clntraw_freeres (CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
 222 {
 223   struct clntraw_private_s *clp = clntraw_private;
 224   XDR *xdrs = &clp->xdr_stream;
 225   bool_t rval;
 226
 227   if (clp == NULL)
 228     {
 229       rval = (bool_t) RPC_FAILED;
 230       return rval;
 231     }
 232   xdrs->x_op = XDR_FREE;
 233   return (*xdr_res) (xdrs, res_ptr);
 234 }
 235
 236 static void
 237 clntraw_abort (void)
 238 {
 239 }
 240
 241 static bool_t
 242 clntraw_control (CLIENT *cl, int i, char *c)
 243 {
 244   return FALSE;
 245 }
 246
 247 static void
 248 clntraw_destroy (CLIENT *cl)
 249 {
 250 }