1 /* $NetBSD: clnt_raw.c,v 1.20 2000/12/10 04:12:03 christos 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char *sccsid2 = "@(#)clnt_raw.c 1.22 87/08/11 Copyr 1984 Sun Micro"; 34 static char *sccsid = "@(#)clnt_raw.c 2.2 88/08/01 4.0 RPCSRC"; 35 #endif 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * clnt_raw.c 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 * 44 * Memory based rpc for simple testing and timing. 45 * Interface to create an rpc client and server in the same process. 46 * This lets us similate rpc and get round trip overhead, without 47 * any interference from the kernel. 48 */ 49 50 #include "namespace.h" 51 #include "reentrant.h" 52 #include <assert.h> 53 #include <err.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 57 #include <rpc/rpc.h> 58 #include <rpc/raw.h> 59 #include "un-namespace.h" 60 #include "mt_misc.h" 61 62 #define MCALL_MSG_SIZE 24 63 64 /* 65 * This is the "network" we will be moving stuff over. 66 */ 67 static struct clntraw_private { 68 CLIENT client_object; 69 XDR xdr_stream; 70 char *_raw_buf; 71 union { 72 struct rpc_msg mashl_rpcmsg; 73 char mashl_callmsg[MCALL_MSG_SIZE]; 74 } u; 75 u_int mcnt; 76 } *clntraw_private; 77 78 static enum clnt_stat clnt_raw_call(CLIENT *, rpcproc_t, xdrproc_t, void *, 79 xdrproc_t, void *, struct timeval); 80 static void clnt_raw_geterr(CLIENT *, struct rpc_err *); 81 static bool_t clnt_raw_freeres(CLIENT *, xdrproc_t, void *); 82 static void clnt_raw_abort(CLIENT *); 83 static bool_t clnt_raw_control(CLIENT *, u_int, void *); 84 static void clnt_raw_destroy(CLIENT *); 85 static struct clnt_ops *clnt_raw_ops(void); 86 87 /* 88 * Create a client handle for memory based rpc. 89 */ 90 CLIENT * 91 clnt_raw_create(prog, vers) 92 rpcprog_t prog; 93 rpcvers_t vers; 94 { 95 struct clntraw_private *clp; 96 struct rpc_msg call_msg; 97 XDR *xdrs; 98 CLIENT *client; 99 100 mutex_lock(&clntraw_lock); 101 if ((clp = clntraw_private) == NULL) { 102 clp = (struct clntraw_private *)calloc(1, sizeof (*clp)); 103 if (clp == NULL) { 104 mutex_unlock(&clntraw_lock); 105 return NULL; 106 } 107 if (__rpc_rawcombuf == NULL) 108 __rpc_rawcombuf = 109 (char *)calloc(UDPMSGSIZE, sizeof (char)); 110 clp->_raw_buf = __rpc_rawcombuf; 111 clntraw_private = clp; 112 } 113 xdrs = &clp->xdr_stream; 114 client = &clp->client_object; 115 116 /* 117 * pre-serialize the static part of the call msg and stash it away 118 */ 119 call_msg.rm_direction = CALL; 120 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 121 /* XXX: prog and vers have been long historically :-( */ 122 call_msg.rm_call.cb_prog = (u_int32_t)prog; 123 call_msg.rm_call.cb_vers = (u_int32_t)vers; 124 xdrmem_create(xdrs, clp->u.mashl_callmsg, MCALL_MSG_SIZE, XDR_ENCODE); 125 if (! xdr_callhdr(xdrs, &call_msg)) 126 warnx("clntraw_create - Fatal header serialization error."); 127 clp->mcnt = XDR_GETPOS(xdrs); 128 XDR_DESTROY(xdrs); 129 130 /* 131 * Set xdrmem for client/server shared buffer 132 */ 133 xdrmem_create(xdrs, clp->_raw_buf, UDPMSGSIZE, XDR_FREE); 134 135 /* 136 * create client handle 137 */ 138 client->cl_ops = clnt_raw_ops(); 139 client->cl_auth = authnone_create(); 140 mutex_unlock(&clntraw_lock); 141 return (client); 142 } 143 144 /* ARGSUSED */ 145 static enum clnt_stat 146 clnt_raw_call(h, proc, xargs, argsp, xresults, resultsp, timeout) 147 CLIENT *h; 148 rpcproc_t proc; 149 xdrproc_t xargs; 150 void *argsp; 151 xdrproc_t xresults; 152 void *resultsp; 153 struct timeval timeout; 154 { 155 struct clntraw_private *clp = clntraw_private; 156 XDR *xdrs = &clp->xdr_stream; 157 struct rpc_msg msg; 158 enum clnt_stat status; 159 struct rpc_err error; 160 161 assert(h != NULL); 162 163 mutex_lock(&clntraw_lock); 164 if (clp == NULL) { 165 mutex_unlock(&clntraw_lock); 166 return (RPC_FAILED); 167 } 168 mutex_unlock(&clntraw_lock); 169 170 call_again: 171 /* 172 * send request 173 */ 174 xdrs->x_op = XDR_ENCODE; 175 XDR_SETPOS(xdrs, 0); 176 clp->u.mashl_rpcmsg.rm_xid ++ ; 177 if ((! XDR_PUTBYTES(xdrs, clp->u.mashl_callmsg, clp->mcnt)) || 178 (! XDR_PUTINT32(xdrs, &proc)) || 179 (! AUTH_MARSHALL(h->cl_auth, xdrs)) || 180 (! (*xargs)(xdrs, argsp))) { 181 return (RPC_CANTENCODEARGS); 182 } 183 (void)XDR_GETPOS(xdrs); /* called just to cause overhead */ 184 185 /* 186 * We have to call server input routine here because this is 187 * all going on in one process. Yuk. 188 */ 189 svc_getreq_common(FD_SETSIZE); 190 191 /* 192 * get results 193 */ 194 xdrs->x_op = XDR_DECODE; 195 XDR_SETPOS(xdrs, 0); 196 msg.acpted_rply.ar_verf = _null_auth; 197 msg.acpted_rply.ar_results.where = resultsp; 198 msg.acpted_rply.ar_results.proc = xresults; 199 if (! xdr_replymsg(xdrs, &msg)) { 200 /* 201 * It's possible for xdr_replymsg() to fail partway 202 * through its attempt to decode the result from the 203 * server. If this happens, it will leave the reply 204 * structure partially populated with dynamically 205 * allocated memory. (This can happen if someone uses 206 * clntudp_bufcreate() to create a CLIENT handle and 207 * specifies a receive buffer size that is too small.) 208 * This memory must be free()ed to avoid a leak. 209 */ 210 int op = xdrs->x_op; 211 xdrs->x_op = XDR_FREE; 212 xdr_replymsg(xdrs, &msg); 213 xdrs->x_op = op; 214 return (RPC_CANTDECODERES); 215 } 216 _seterr_reply(&msg, &error); 217 status = error.re_status; 218 219 if (status == RPC_SUCCESS) { 220 if (! AUTH_VALIDATE(h->cl_auth, &msg.acpted_rply.ar_verf)) { 221 status = RPC_AUTHERROR; 222 } 223 } /* end successful completion */ 224 else { 225 if (AUTH_REFRESH(h->cl_auth, &msg)) 226 goto call_again; 227 } /* end of unsuccessful completion */ 228 229 if (status == RPC_SUCCESS) { 230 if (! AUTH_VALIDATE(h->cl_auth, &msg.acpted_rply.ar_verf)) { 231 status = RPC_AUTHERROR; 232 } 233 if (msg.acpted_rply.ar_verf.oa_base != NULL) { 234 xdrs->x_op = XDR_FREE; 235 (void)xdr_opaque_auth(xdrs, &(msg.acpted_rply.ar_verf)); 236 } 237 } 238 239 return (status); 240 } 241 242 /*ARGSUSED*/ 243 static void 244 clnt_raw_geterr(cl, err) 245 CLIENT *cl; 246 struct rpc_err *err; 247 { 248 } 249 250 251 /* ARGSUSED */ 252 static bool_t 253 clnt_raw_freeres(cl, xdr_res, res_ptr) 254 CLIENT *cl; 255 xdrproc_t xdr_res; 256 void *res_ptr; 257 { 258 struct clntraw_private *clp = clntraw_private; 259 XDR *xdrs = &clp->xdr_stream; 260 bool_t rval; 261 262 mutex_lock(&clntraw_lock); 263 if (clp == NULL) { 264 rval = (bool_t) RPC_FAILED; 265 mutex_unlock(&clntraw_lock); 266 return (rval); 267 } 268 mutex_unlock(&clntraw_lock); 269 xdrs->x_op = XDR_FREE; 270 return ((*xdr_res)(xdrs, res_ptr)); 271 } 272 273 /*ARGSUSED*/ 274 static void 275 clnt_raw_abort(cl) 276 CLIENT *cl; 277 { 278 } 279 280 /*ARGSUSED*/ 281 static bool_t 282 clnt_raw_control(cl, ui, str) 283 CLIENT *cl; 284 u_int ui; 285 void *str; 286 { 287 return (FALSE); 288 } 289 290 /*ARGSUSED*/ 291 static void 292 clnt_raw_destroy(cl) 293 CLIENT *cl; 294 { 295 } 296 297 static struct clnt_ops * 298 clnt_raw_ops() 299 { 300 static struct clnt_ops ops; 301 302 /* VARIABLES PROTECTED BY ops_lock: ops */ 303 304 mutex_lock(&ops_lock); 305 if (ops.cl_call == NULL) { 306 ops.cl_call = clnt_raw_call; 307 ops.cl_abort = clnt_raw_abort; 308 ops.cl_geterr = clnt_raw_geterr; 309 ops.cl_freeres = clnt_raw_freeres; 310 ops.cl_destroy = clnt_raw_destroy; 311 ops.cl_control = clnt_raw_control; 312 } 313 mutex_unlock(&ops_lock); 314 return (&ops); 315 } 316