lib/libc/rpc/svc_raw.c

   1 /*      $NetBSD: svc_raw.c,v 1.22 2012/03/20 17:14:50 matt Exp $        */
   2
   3 /*
   4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   5  * unrestricted use provided that this legend is included on all tape
   6  * media and as a part of the software program in whole or part.  Users
   7  * may copy or modify Sun RPC without charge, but are not authorized
   8  * to license or distribute it to anyone else except as part of a product or
   9  * program developed by the user.
  10  *
  11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  14  *
  15  * Sun RPC is provided with no support and without any obligation on the
  16  * part of Sun Microsystems, Inc. to assist in its use, correction,
  17  * modification or enhancement.
  18  *
  19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  21  * OR ANY PART THEREOF.
  22  *
  23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  24  * or profits or other special, indirect and consequential damages, even if
  25  * Sun has been advised of the possibility of such damages.
  26  *
  27  * Sun Microsystems, Inc.
  28  * 2550 Garcia Avenue
  29  * Mountain View, California  94043
  30  */
  31 /*
  32  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  33  */
  34
  35 /* #ident       "@(#)svc_raw.c  1.16    94/04/24 SMI" */
  36
  37 #include <sys/cdefs.h>
  38 #if defined(LIBC_SCCS) && !defined(lint)
  39 #if 0
  40 static char sccsid[] = "@(#)svc_raw.c 1.25 89/01/31 Copyr 1984 Sun Micro";
  41 #else
  42 __RCSID("$NetBSD: svc_raw.c,v 1.22 2012/03/20 17:14:50 matt Exp $");
  43 #endif
  44 #endif
  45
  46 /*
  47  * svc_raw.c,   This a toy for simple testing and timing.
  48  * Interface to create an rpc client and server in the same UNIX process.
  49  * This lets us similate rpc and get rpc (round trip) overhead, without
  50  * any interference from the kernel.
  51  *
  52  */
  53
  54 #include "namespace.h"
  55 #include "reentrant.h"
  56 #include <rpc/rpc.h>
  57 #include <sys/types.h>
  58 #include <rpc/raw.h>
  59 #include <assert.h>
  60 #include <stdlib.h>
  61
  62 #ifdef __weak_alias
  63 __weak_alias(svc_raw_create,_svc_raw_create)
  64 #endif
  65
  66 #ifndef UDPMSGSIZE
  67 #define UDPMSGSIZE 8800
  68 #endif
  69
  70 /*
  71  * This is the "network" that we will be moving data over
  72  */
  73 static struct svc_raw_private {
  74         char    *raw_buf;       /* should be shared with the cl handle */
  75         SVCXPRT server;
  76         XDR     xdr_stream;
  77         char    verf_body[MAX_AUTH_BYTES];
  78 } *svc_raw_private;
  79
  80 #ifdef _REENTRANT
  81 extern mutex_t  svcraw_lock;
  82 #endif
  83
  84 static enum xprt_stat svc_raw_stat(SVCXPRT *);
  85 static bool_t svc_raw_recv(SVCXPRT *, struct rpc_msg *);
  86 static bool_t svc_raw_reply(SVCXPRT *, struct rpc_msg *);
  87 static bool_t svc_raw_getargs(SVCXPRT *, xdrproc_t, caddr_t);
  88 static bool_t svc_raw_freeargs(SVCXPRT *, xdrproc_t, caddr_t);
  89 static void svc_raw_destroy(SVCXPRT *);
  90 static void svc_raw_ops(SVCXPRT *);
  91 static bool_t svc_raw_control(SVCXPRT *, const u_int, void *);
  92
  93 char *__rpc_rawcombuf = NULL;
  94
  95 SVCXPRT *
  96 svc_raw_create(void)
  97 {
  98         struct svc_raw_private *srp;
  99 /* VARIABLES PROTECTED BY svcraw_lock: svc_raw_private, srp */
 100
 101         mutex_lock(&svcraw_lock);
 102         srp = svc_raw_private;
 103         if (srp == NULL) {
 104                 srp = calloc(1, sizeof(*srp));
 105                 if (srp == NULL)
 106                         goto out;
 107                 if (__rpc_rawcombuf == NULL)
 108                         __rpc_rawcombuf = malloc(UDPMSGSIZE);
 109                 if (__rpc_rawcombuf == NULL)
 110                         goto out;
 111                 srp->raw_buf = __rpc_rawcombuf; /* Share it with the client */
 112                 svc_raw_private = srp;
 113         }
 114         srp->server.xp_fd = FD_SETSIZE;
 115         srp->server.xp_port = 0;
 116         srp->server.xp_p3 = NULL;
 117         svc_raw_ops(&srp->server);
 118         srp->server.xp_verf.oa_base = srp->verf_body;
 119         xdrmem_create(&srp->xdr_stream, srp->raw_buf, UDPMSGSIZE, XDR_DECODE);
 120         xprt_register(&srp->server);
 121         mutex_unlock(&svcraw_lock);
 122         return (&srp->server);
 123 out:
 124         if (srp != NULL)
 125                 free(srp);
 126         mutex_unlock(&svcraw_lock);
 127         return (NULL);
 128 }
 129
 130 /*ARGSUSED*/
 131 static enum xprt_stat
 132 svc_raw_stat(SVCXPRT *xprt) /* args needed to satisfy ANSI-C typechecking */
 133 {
 134         return (XPRT_IDLE);
 135 }
 136
 137 /*ARGSUSED*/
 138 static bool_t
 139 svc_raw_recv(SVCXPRT *xprt, struct rpc_msg *msg)
 140 {
 141         struct svc_raw_private *srp;
 142         XDR *xdrs;
 143
 144         mutex_lock(&svcraw_lock);
 145         srp = svc_raw_private;
 146         if (srp == NULL) {
 147                 mutex_unlock(&svcraw_lock);
 148                 return (FALSE);
 149         }
 150         mutex_unlock(&svcraw_lock);
 151
 152         xdrs = &srp->xdr_stream;
 153         xdrs->x_op = XDR_DECODE;
 154         (void) XDR_SETPOS(xdrs, 0);
 155         if (! xdr_callmsg(xdrs, msg)) {
 156                 return (FALSE);
 157         }
 158         return (TRUE);
 159 }
 160
 161 /*ARGSUSED*/
 162 static bool_t
 163 svc_raw_reply(SVCXPRT *xprt, struct rpc_msg *msg)
 164 {
 165         struct svc_raw_private *srp;
 166         XDR *xdrs;
 167
 168         mutex_lock(&svcraw_lock);
 169         srp = svc_raw_private;
 170         if (srp == NULL) {
 171                 mutex_unlock(&svcraw_lock);
 172                 return (FALSE);
 173         }
 174         mutex_unlock(&svcraw_lock);
 175
 176         xdrs = &srp->xdr_stream;
 177         xdrs->x_op = XDR_ENCODE;
 178         (void) XDR_SETPOS(xdrs, 0);
 179         if (! xdr_replymsg(xdrs, msg)) {
 180                 return (FALSE);
 181         }
 182         (void) XDR_GETPOS(xdrs);  /* called just for overhead */
 183         return (TRUE);
 184 }
 185
 186 /*ARGSUSED*/
 187 static bool_t
 188 svc_raw_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
 189 {
 190         struct svc_raw_private *srp;
 191
 192         mutex_lock(&svcraw_lock);
 193         srp = svc_raw_private;
 194         if (srp == NULL) {
 195                 mutex_unlock(&svcraw_lock);
 196                 return (FALSE);
 197         }
 198         mutex_unlock(&svcraw_lock);
 199         return (*xdr_args)(&srp->xdr_stream, args_ptr);
 200 }
 201
 202 /*ARGSUSED*/
 203 static bool_t
 204 svc_raw_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
 205 {
 206         struct svc_raw_private *srp;
 207         XDR *xdrs;
 208
 209         mutex_lock(&svcraw_lock);
 210         srp = svc_raw_private;
 211         if (srp == NULL) {
 212                 mutex_unlock(&svcraw_lock);
 213                 return (FALSE);
 214         }
 215         mutex_unlock(&svcraw_lock);
 216
 217         xdrs = &srp->xdr_stream;
 218         xdrs->x_op = XDR_FREE;
 219         return (*xdr_args)(xdrs, args_ptr);
 220 }
 221
 222 /*ARGSUSED*/
 223 static void
 224 svc_raw_destroy(SVCXPRT *xprt)
 225 {
 226 }
 227
 228 /*ARGSUSED*/
 229 static bool_t
 230 svc_raw_control(SVCXPRT *xprt, const u_int rq, void *in)
 231 {
 232         return (FALSE);
 233 }
 234
 235 static void
 236 svc_raw_ops(SVCXPRT *xprt)
 237 {
 238         static struct xp_ops ops;
 239         static struct xp_ops2 ops2;
 240 #ifdef _REENTRANT
 241         extern mutex_t ops_lock;
 242 #endif
 243
 244         _DIAGASSERT(xprt != NULL);
 245
 246 /* VARIABLES PROTECTED BY ops_lock: ops */
 247
 248         mutex_lock(&ops_lock);
 249         if (ops.xp_recv == NULL) {
 250                 ops.xp_recv = svc_raw_recv;
 251                 ops.xp_stat = svc_raw_stat;
 252                 ops.xp_getargs = svc_raw_getargs;
 253                 ops.xp_reply = svc_raw_reply;
 254                 ops.xp_freeargs = svc_raw_freeargs;
 255                 ops.xp_destroy = svc_raw_destroy;
 256                 ops2.xp_control = svc_raw_control;
 257         }
 258         xprt->xp_ops = &ops;
 259         xprt->xp_ops2 = &ops2;
 260         mutex_unlock(&ops_lock);
 261 }