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 (clntraw_create, GLIBC_2_0)
 133
 134 static enum clnt_stat
 135 clntraw_call (h, proc, xargs, argsp, xresults, resultsp, timeout)
 136      CLIENT *h;
 137      u_long proc;
 138      xdrproc_t xargs;
 139      caddr_t argsp;
 140      xdrproc_t xresults;
 141      caddr_t resultsp;
 142      struct timeval timeout;
 143 {
 144   struct clntraw_private_s *clp = clntraw_private;
 145   XDR *xdrs = &clp->xdr_stream;
 146   struct rpc_msg msg;
 147   enum clnt_stat status;
 148   struct rpc_err error;
 149
 150   if (clp == NULL)
 151     return RPC_FAILED;
 152 call_again:
 153   /*
 154    * send request
 155    */
 156   xdrs->x_op = XDR_ENCODE;
 157   XDR_SETPOS (xdrs, 0);
 158   /* Just checking the union definition to access rm_xid is correct.  */
 159   if (offsetof (struct rpc_msg, rm_xid) != 0)
 160     abort ();
 161   clp->mashl_callmsg.rm_xid++;
 162   if ((!XDR_PUTBYTES (xdrs, clp->mashl_callmsg.msg, clp->mcnt)) ||
 163       (!XDR_PUTLONG (xdrs, (long *) &proc)) ||
 164       (!AUTH_MARSHALL (h->cl_auth, xdrs)) ||
 165       (!(*xargs) (xdrs, argsp)))
 166     {
 167       return (RPC_CANTENCODEARGS);
 168     }
 169   (void) XDR_GETPOS (xdrs);     /* called just to cause overhead */
 170
 171   /*
 172    * We have to call server input routine here because this is
 173    * all going on in one process. Yuk.
 174    */
 175   svc_getreq (1);
 176
 177   /*
 178    * get results
 179    */
 180   xdrs->x_op = XDR_DECODE;
 181   XDR_SETPOS (xdrs, 0);
 182   msg.acpted_rply.ar_verf = _null_auth;
 183   msg.acpted_rply.ar_results.where = resultsp;
 184   msg.acpted_rply.ar_results.proc = xresults;
 185   if (!xdr_replymsg (xdrs, &msg))
 186     return RPC_CANTDECODERES;
 187   _seterr_reply (&msg, &error);
 188   status = error.re_status;
 189
 190   if (status == RPC_SUCCESS)
 191     {
 192       if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
 193         {
 194           status = RPC_AUTHERROR;
 195         }
 196     }                           /* end successful completion */
 197   else
 198     {
 199       if (AUTH_REFRESH (h->cl_auth))
 200         goto call_again;
 201     }                           /* end of unsuccessful completion */
 202
 203   if (status == RPC_SUCCESS)
 204     {
 205       if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
 206         {
 207           status = RPC_AUTHERROR;
 208         }
 209       if (msg.acpted_rply.ar_verf.oa_base != NULL)
 210         {
 211           xdrs->x_op = XDR_FREE;
 212           (void) xdr_opaque_auth (xdrs, &(msg.acpted_rply.ar_verf));
 213         }
 214     }
 215
 216   return status;
 217 }
 218
 219 static void
 220 clntraw_geterr (CLIENT *cl, struct rpc_err *err)
 221 {
 222 }
 223
 224
 225 static bool_t
 226 clntraw_freeres (cl, xdr_res, res_ptr)
 227      CLIENT *cl;
 228      xdrproc_t xdr_res;
 229      caddr_t res_ptr;
 230 {
 231   struct clntraw_private_s *clp = clntraw_private;
 232   XDR *xdrs = &clp->xdr_stream;
 233   bool_t rval;
 234
 235   if (clp == NULL)
 236     {
 237       rval = (bool_t) RPC_FAILED;
 238       return rval;
 239     }
 240   xdrs->x_op = XDR_FREE;
 241   return (*xdr_res) (xdrs, res_ptr);
 242 }
 243
 244 static void
 245 clntraw_abort (void)
 246 {
 247 }
 248
 249 static bool_t
 250 clntraw_control (CLIENT *cl, int i, char *c)
 251 {
 252   return FALSE;
 253 }
 254
 255 static void
 256 clntraw_destroy (CLIENT *cl)
 257 {
 258 }