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