usr/src/lib/libc/port/nsl/svc_raw.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 /*
  24  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
  28 /* All Rights Reserved */
  29 /*
  30  * Portions of this source code were derived from Berkeley
  31  * 4.3 BSD under license from the Regents of the University of
  32  * California.
  33  */
  34
  35 /*
  36  * svc_raw.c,   This is a toy for simple testing and timing.
  37  * Interface to create an rpc client and server in the same UNIX process.
  38  * This lets us simulate rpc and get rpc (round trip) overhead, without
  39  * any interference from the kernal.
  40  */
  41
  42 #include "mt.h"
  43 #include "rpc_mt.h"
  44 #include <stdlib.h>
  45 #include <rpc/rpc.h>
  46 #include <sys/types.h>
  47 #include <syslog.h>
  48
  49 #ifndef UDPMSGSIZE
  50 #define UDPMSGSIZE 8800
  51 #endif
  52
  53 /*
  54  * This is the "network" that we will be moving data over
  55  */
  56 static struct svc_raw_private {
  57         struct netbuf   *raw_netbuf;
  58         SVCXPRT *server;
  59         XDR     xdr_stream;
  60         char    verf_body[MAX_AUTH_BYTES];
  61 } *svc_raw_private;
  62
  63 static struct xp_ops *svc_raw_ops();
  64 extern mutex_t  svcraw_lock;
  65
  66 /*
  67  * This netbuf is shared with the raw client.
  68  */
  69 struct netbuf _rawcomnetbuf;
  70
  71 SVCXPRT *
  72 svc_raw_create(void)
  73 {
  74         struct svc_raw_private *srp;
  75
  76 /* VARIABLES PROTECTED BY svcraw_lock: svc_raw_private, srp */
  77         (void) mutex_lock(&svcraw_lock);
  78         srp = svc_raw_private;
  79         if (srp != NULL) {
  80                 (void) mutex_unlock(&svcraw_lock);
  81                 return (srp->server);
  82         }
  83
  84         srp = calloc(1, sizeof (*srp));
  85         if (srp == NULL) {
  86                 syslog(LOG_ERR, "svc_raw_create: out of memory");
  87
  88                 (void) mutex_unlock(&svcraw_lock);
  89                 return (NULL);
  90         }
  91
  92         srp->raw_netbuf = &_rawcomnetbuf;
  93         srp->raw_netbuf->buf = malloc(UDPMSGSIZE);
  94         if (srp->raw_netbuf->buf == NULL) {
  95                 free(srp);
  96                 syslog(LOG_ERR, "svc_raw_create: out of memory");
  97
  98                 (void) mutex_unlock(&svcraw_lock);
  99                 return (NULL);
 100         }
 101         srp->raw_netbuf->maxlen = UDPMSGSIZE;
 102         srp->raw_netbuf->len = 0;
 103
 104         if ((srp->server = svc_xprt_alloc()) == NULL) {
 105                 free(srp->raw_netbuf->buf);
 106                 srp->raw_netbuf->buf = NULL;
 107                 srp->raw_netbuf->maxlen = 0;
 108
 109                 free(srp);
 110
 111                 (void) mutex_unlock(&svcraw_lock);
 112                 return (NULL);
 113         }
 114
 115         /*
 116          * By convention, using FD_SETSIZE as the pseudo file descriptor
 117          */
 118         srp->server->xp_fd = FD_SETSIZE;
 119         srp->server->xp_port = 0;
 120         srp->server->xp_ops = svc_raw_ops();
 121         srp->server->xp_verf.oa_base = srp->verf_body;
 122         xprt_register(srp->server);
 123
 124         svc_raw_private = srp;
 125
 126         (void) mutex_unlock(&svcraw_lock);
 127         return (srp->server);
 128 }
 129
 130 /*ARGSUSED*/
 131 static enum xprt_stat
 132 svc_raw_stat(SVCXPRT *xprt)
 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         (void) mutex_lock(&svcraw_lock);
 145         srp = svc_raw_private;
 146         if (srp == NULL) {
 147                 (void) mutex_unlock(&svcraw_lock);
 148                 return (FALSE);
 149         }
 150         (void) mutex_unlock(&svcraw_lock);
 151
 152         xdrs = &srp->xdr_stream;
 153
 154         xdrmem_create(xdrs, srp->raw_netbuf->buf, srp->raw_netbuf->len,
 155             XDR_DECODE);
 156
 157         if (!xdr_callmsg(xdrs, msg)) {
 158                 XDR_DESTROY(xdrs);
 159                 return (FALSE);
 160         }
 161
 162         return (TRUE);
 163 }
 164
 165 /*ARGSUSED*/
 166 static bool_t
 167 svc_raw_reply(SVCXPRT *xprt, struct rpc_msg *msg)
 168 {
 169         struct svc_raw_private *srp;
 170         XDR *xdrs;
 171         uint_t start;
 172
 173         (void) mutex_lock(&svcraw_lock);
 174         srp = svc_raw_private;
 175         if (srp == NULL) {
 176                 (void) mutex_unlock(&svcraw_lock);
 177                 return (FALSE);
 178         }
 179         (void) mutex_unlock(&svcraw_lock);
 180
 181         xdrs = &srp->xdr_stream;
 182
 183         XDR_DESTROY(xdrs);
 184         xdrmem_create(xdrs, srp->raw_netbuf->buf, srp->raw_netbuf->maxlen,
 185             XDR_ENCODE);
 186
 187         start = XDR_GETPOS(xdrs);
 188         if (!xdr_replymsg(xdrs, msg)) {
 189                 XDR_DESTROY(xdrs);
 190                 return (FALSE);
 191         }
 192         srp->raw_netbuf->len = XDR_GETPOS(xdrs) - start;
 193
 194         return (TRUE);
 195 }
 196
 197 /*ARGSUSED*/
 198 static bool_t
 199 svc_raw_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
 200 {
 201         struct svc_raw_private *srp;
 202
 203         (void) mutex_lock(&svcraw_lock);
 204         srp = svc_raw_private;
 205         if (srp == NULL) {
 206                 (void) mutex_unlock(&svcraw_lock);
 207                 return (FALSE);
 208         }
 209         (void) mutex_unlock(&svcraw_lock);
 210
 211         return ((*xdr_args)(&srp->xdr_stream, args_ptr));
 212 }
 213
 214 /*ARGSUSED*/
 215 static bool_t
 216 svc_raw_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
 217 {
 218         struct svc_raw_private *srp;
 219
 220         (void) mutex_lock(&svcraw_lock);
 221         srp = svc_raw_private;
 222         if (srp == NULL) {
 223                 (void) mutex_unlock(&svcraw_lock);
 224                 return (FALSE);
 225         }
 226         (void) mutex_unlock(&svcraw_lock);
 227
 228         XDR_DESTROY(&srp->xdr_stream);
 229
 230         xdr_free(xdr_args, args_ptr);
 231
 232         return (TRUE);
 233 }
 234
 235 /*ARGSUSED*/
 236 static void
 237 svc_raw_destroy(SVCXPRT *xprt)
 238 {
 239 }
 240
 241 /*ARGSUSED*/
 242 static bool_t
 243 svc_raw_control(SVCXPRT *xprt, const uint_t rq, void *in)
 244 {
 245         switch (rq) {
 246         case SVCGET_XID: /* fall through for now */
 247         default:
 248                 return (FALSE);
 249         }
 250 }
 251
 252 static struct xp_ops *
 253 svc_raw_ops(void)
 254 {
 255         static struct xp_ops ops;
 256         extern mutex_t ops_lock;
 257
 258 /* VARIABLES PROTECTED BY ops_lock: ops */
 259
 260         (void) mutex_lock(&ops_lock);
 261         if (ops.xp_recv == NULL) {
 262                 ops.xp_recv = svc_raw_recv;
 263                 ops.xp_stat = svc_raw_stat;
 264                 ops.xp_getargs = svc_raw_getargs;
 265                 ops.xp_reply = svc_raw_reply;
 266                 ops.xp_freeargs = svc_raw_freeargs;
 267                 ops.xp_destroy = svc_raw_destroy;
 268                 ops.xp_control = svc_raw_control;
 269         }
 270         (void) mutex_unlock(&ops_lock);
 271         return (&ops);
 272 }