svc_simple.c revision 1.30.24.1
1 /* $NetBSD: svc_simple.c,v 1.30.24.1 2013/03/14 22:03:14 riz Exp $ */ 2 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 /* 34 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 35 */ 36 37 /* #pragma ident "@(#)svc_simple.c 1.18 94/04/24 SMI" */ 38 39 /* 40 * svc_simple.c 41 * Simplified front end to rpc. 42 */ 43 44 /* 45 * This interface creates a virtual listener for all the services 46 * started thru rpc_reg(). It listens on the same endpoint for 47 * all the services and then executes the corresponding service 48 * for the given prognum and procnum. 49 */ 50 51 #include <sys/cdefs.h> 52 #if defined(LIBC_SCCS) && !defined(lint) 53 __RCSID("$NetBSD: svc_simple.c,v 1.30.24.1 2013/03/14 22:03:14 riz Exp $"); 54 #endif 55 56 #include "namespace.h" 57 #include "reentrant.h" 58 #include <sys/types.h> 59 #include <rpc/rpc.h> 60 #include <rpc/nettype.h> 61 #include <assert.h> 62 #include <err.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 67 #include "rpc_internal.h" 68 69 #ifdef __weak_alias 70 __weak_alias(rpc_reg,_rpc_reg) 71 #endif 72 73 static void universal __P((struct svc_req *, SVCXPRT *)); 74 75 static struct proglst { 76 char *(*p_progname) __P((char *)); 77 rpcprog_t p_prognum; 78 rpcvers_t p_versnum; 79 rpcproc_t p_procnum; 80 SVCXPRT *p_transp; 81 char *p_netid; 82 char *p_xdrbuf; 83 int p_recvsz; 84 xdrproc_t p_inproc, p_outproc; 85 struct proglst *p_nxt; 86 } *proglst; 87 88 static const char rpc_reg_err[] = "%s: %s"; 89 static const char rpc_reg_msg[] = "rpc_reg: "; 90 static const char __reg_err1[] = "can't find appropriate transport"; 91 static const char __reg_err2[] = "can't get protocol info"; 92 static const char __reg_err3[] = "unsupported transport size"; 93 static const char __no_mem_str[] = "out of memory"; 94 95 /* 96 * For simplified, easy to use kind of rpc interfaces. 97 * nettype indicates the type of transport on which the service will be 98 * listening. Used for conservation of the system resource. Only one 99 * handle is created for all the services (actually one of each netid) 100 * and same xdrbuf is used for same netid. The size of the arguments 101 * is also limited by the recvsize for that transport, even if it is 102 * a COTS transport. This may be wrong, but for cases like these, they 103 * should not use the simplified interfaces like this. 104 */ 105 106 int 107 rpc_reg(prognum, versnum, procnum, progname, inproc, outproc, nettype) 108 rpcprog_t prognum; /* program number */ 109 rpcvers_t versnum; /* version number */ 110 rpcproc_t procnum; /* procedure number */ 111 char *(*progname) __P((char *)); /* Server routine */ 112 xdrproc_t inproc, outproc; /* in/out XDR procedures */ 113 char *nettype; /* nettype */ 114 { 115 struct netconfig *nconf; 116 int done = FALSE; 117 void *handle; 118 #ifdef _REENTRANT 119 extern mutex_t proglst_lock; 120 #endif 121 122 if (procnum == NULLPROC) { 123 warnx("%s can't reassign procedure number %u", rpc_reg_msg, 124 NULLPROC); 125 return (-1); 126 } 127 128 if (nettype == NULL) 129 nettype = __UNCONST("netpath"); /* The default behavior */ 130 if ((handle = __rpc_setconf(nettype)) == NULL) { 131 warnx(rpc_reg_err, rpc_reg_msg, __reg_err1); 132 return (-1); 133 } 134 /* VARIABLES PROTECTED BY proglst_lock: proglst */ 135 mutex_lock(&proglst_lock); 136 while ((nconf = __rpc_getconf(handle)) != NULL) { 137 struct proglst *pl; 138 SVCXPRT *svcxprt; 139 int madenow; 140 u_int recvsz; 141 char *xdrbuf; 142 char *netid; 143 144 madenow = FALSE; 145 svcxprt = NULL; 146 recvsz = 0; 147 xdrbuf = NULL; 148 netid = NULL; 149 for (pl = proglst; pl; pl = pl->p_nxt) 150 if (strcmp(pl->p_netid, nconf->nc_netid) == 0) { 151 svcxprt = pl->p_transp; 152 xdrbuf = pl->p_xdrbuf; 153 recvsz = pl->p_recvsz; 154 netid = pl->p_netid; 155 break; 156 } 157 158 if (svcxprt == NULL) { 159 struct __rpc_sockinfo si; 160 161 svcxprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 162 if (svcxprt == NULL) 163 continue; 164 if (!__rpc_fd2sockinfo(svcxprt->xp_fd, &si)) { 165 warnx(rpc_reg_err, rpc_reg_msg, __reg_err2); 166 SVC_DESTROY(svcxprt); 167 continue; 168 } 169 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, 0); 170 if (recvsz == 0) { 171 warnx(rpc_reg_err, rpc_reg_msg, __reg_err3); 172 SVC_DESTROY(svcxprt); 173 continue; 174 } 175 if (((xdrbuf = malloc((size_t)recvsz)) == NULL) || 176 ((netid = strdup(nconf->nc_netid)) == NULL)) { 177 warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); 178 if (xdrbuf != NULL) 179 free(xdrbuf); 180 if (netid != NULL) 181 free(netid); 182 SVC_DESTROY(svcxprt); 183 break; 184 } 185 madenow = TRUE; 186 } 187 /* 188 * Check if this (program, version, netid) had already been 189 * registered. The check may save a few RPC calls to rpcbind 190 */ 191 for (pl = proglst; pl; pl = pl->p_nxt) 192 if ((pl->p_prognum == prognum) && 193 (pl->p_versnum == versnum) && 194 (strcmp(pl->p_netid, netid) == 0)) 195 break; 196 if (pl == NULL) { /* Not yet */ 197 (void) rpcb_unset(prognum, versnum, nconf); 198 } else { 199 /* so that svc_reg does not call rpcb_set() */ 200 nconf = NULL; 201 } 202 203 if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) { 204 warnx("%s couldn't register prog %u vers %u for %s", 205 rpc_reg_msg, (unsigned)prognum, 206 (unsigned)versnum, netid); 207 if (madenow) { 208 SVC_DESTROY(svcxprt); 209 free(xdrbuf); 210 free(netid); 211 } 212 continue; 213 } 214 215 pl = malloc(sizeof(*pl)); 216 if (pl == NULL) { 217 warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); 218 if (madenow) { 219 SVC_DESTROY(svcxprt); 220 free(xdrbuf); 221 free(netid); 222 } 223 break; 224 } 225 pl->p_progname = progname; 226 pl->p_prognum = prognum; 227 pl->p_versnum = versnum; 228 pl->p_procnum = procnum; 229 pl->p_inproc = inproc; 230 pl->p_outproc = outproc; 231 pl->p_transp = svcxprt; 232 pl->p_xdrbuf = xdrbuf; 233 pl->p_recvsz = recvsz; 234 pl->p_netid = netid; 235 pl->p_nxt = proglst; 236 proglst = pl; 237 done = TRUE; 238 } 239 __rpc_endconf(handle); 240 mutex_unlock(&proglst_lock); 241 242 if (done == FALSE) { 243 warnx("%s cant find suitable transport for %s", 244 rpc_reg_msg, nettype); 245 return (-1); 246 } 247 return (0); 248 } 249 250 /* 251 * The universal handler for the services registered using registerrpc. 252 * It handles both the connectionless and the connection oriented cases. 253 */ 254 255 static void 256 universal(rqstp, transp) 257 struct svc_req *rqstp; 258 SVCXPRT *transp; 259 { 260 rpcprog_t prog; 261 rpcvers_t vers; 262 rpcproc_t proc; 263 char *outdata; 264 char *xdrbuf; 265 struct proglst *pl; 266 #ifdef _REENTRANT 267 extern mutex_t proglst_lock; 268 #endif 269 270 _DIAGASSERT(rqstp != NULL); 271 _DIAGASSERT(transp != NULL); 272 273 /* 274 * enforce "procnum 0 is echo" convention 275 */ 276 if (rqstp->rq_proc == NULLPROC) { 277 if (svc_sendreply(transp, (xdrproc_t) xdr_void, NULL) == 278 FALSE) { 279 warnx("svc_sendreply failed"); 280 } 281 return; 282 } 283 prog = rqstp->rq_prog; 284 vers = rqstp->rq_vers; 285 proc = rqstp->rq_proc; 286 mutex_lock(&proglst_lock); 287 for (pl = proglst; pl; pl = pl->p_nxt) 288 if (pl->p_prognum == prog && pl->p_procnum == proc && 289 pl->p_versnum == vers && 290 (strcmp(pl->p_netid, transp->xp_netid) == 0)) { 291 /* decode arguments into a CLEAN buffer */ 292 xdrbuf = pl->p_xdrbuf; 293 /* Zero the arguments: reqd ! */ 294 (void) memset(xdrbuf, 0, (size_t)pl->p_recvsz); 295 /* 296 * Assuming that sizeof (xdrbuf) would be enough 297 * for the arguments; if not then the program 298 * may bomb. BEWARE! 299 */ 300 if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) { 301 svcerr_decode(transp); 302 mutex_unlock(&proglst_lock); 303 return; 304 } 305 outdata = (*(pl->p_progname))(xdrbuf); 306 if (outdata == NULL && 307 pl->p_outproc != (xdrproc_t) xdr_void){ 308 /* there was an error */ 309 mutex_unlock(&proglst_lock); 310 return; 311 } 312 if (!svc_sendreply(transp, pl->p_outproc, outdata)) { 313 warnx( 314 "rpc: rpc_reg trouble replying to prog %u vers %u", 315 (unsigned)prog, (unsigned)vers); 316 mutex_unlock(&proglst_lock); 317 return; 318 } 319 /* free the decoded arguments */ 320 (void) svc_freeargs(transp, pl->p_inproc, xdrbuf); 321 mutex_unlock(&proglst_lock); 322 return; 323 } 324 mutex_unlock(&proglst_lock); 325 /* This should never happen */ 326 warnx("rpc: rpc_reg: never registered prog %u vers %u", 327 (unsigned)prog, (unsigned)vers); 328 return; 329 } 330
Indexes created Tue Sep 30 11:09:46 GMT 2025