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 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 /* 29 * Portions of this source code were derived from Berkeley 30 * 4.3 BSD under license from the Regents of the University of 31 * California. 32 */ 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 /* 37 * svc_simple.c 38 * Simplified front end to rpc. 39 */ 40 41 /* 42 * This interface creates a virtual listener for all the services 43 * started thru rpc_reg(). It listens on the same endpoint for 44 * all the services and then executes the corresponding service 45 * for the given prognum and procnum. 46 */ 47 48 #include "mt.h" 49 #include "rpc_mt.h" 50 #include <errno.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <rpc/rpc.h> 55 #include <sys/types.h> 56 #include <rpc/trace.h> 57 #include <syslog.h> 58 #include <rpc/nettype.h> 59 60 static struct proglst { 61 char *(*p_progname)(); 62 rpcprog_t p_prognum; 63 rpcvers_t p_versnum; 64 rpcproc_t p_procnum; 65 SVCXPRT *p_transp; 66 char *p_netid; 67 char *p_xdrbuf; 68 int p_recvsz; 69 xdrproc_t p_inproc, p_outproc; 70 struct proglst *p_nxt; 71 } *proglst; 72 73 static void universal(); 74 75 static const char rpc_reg_err[] = "%s: %s"; 76 static const char rpc_reg_msg[] = "rpc_reg: "; 77 static const char __reg_err1[] = "can't find appropriate transport"; 78 static const char __reg_err3[] = "unsupported transport size"; 79 static const char __no_mem_str[] = "out of memory"; 80 /* 81 * For simplified, easy to use kind of rpc interfaces. 82 * nettype indicates the type of transport on which the service will be 83 * listening. Used for conservation of the system resource. Only one 84 * handle is created for all the services (actually one of each netid) 85 * and same xdrbuf is used for same netid. The size of the arguments 86 * is also limited by the recvsize for that transport, even if it is 87 * a COTS transport. This may be wrong, but for cases like these, they 88 * should not use the simplified interfaces like this. 89 */ 90 91 int 92 rpc_reg(prognum, versnum, procnum, progname, inproc, outproc, nettype) 93 rpcprog_t prognum; /* program number */ 94 rpcvers_t versnum; /* version number */ 95 rpcproc_t procnum; /* procedure number */ 96 char *(*progname)(); /* Server routine */ 97 xdrproc_t inproc, outproc; /* in/out XDR procedures */ 98 const char *nettype; /* nettype */ 99 { 100 struct netconfig *nconf; 101 int done = FALSE; 102 void *handle; 103 extern mutex_t proglst_lock; 104 105 106 107 trace4(TR_rpc_reg, 0, prognum, versnum, procnum); 108 if (procnum == NULLPROC) { 109 (void) syslog(LOG_ERR, (const char *) "%s: %s %d", 110 rpc_reg_msg, 111 (const char *) "can't reassign procedure number %d", 112 NULLPROC); 113 trace4(TR_rpc_reg, 1, prognum, versnum, procnum); 114 return (-1); 115 } 116 117 if (nettype == NULL) 118 nettype = "netpath"; /* The default behavior */ 119 if ((handle = __rpc_setconf((char *)nettype)) == NULL) { 120 (void) syslog(LOG_ERR, rpc_reg_err, rpc_reg_msg, __reg_err1); 121 return (-1); 122 } 123 /* VARIABLES PROTECTED BY proglst_lock: proglst */ 124 mutex_lock(&proglst_lock); 125 while (nconf = __rpc_getconf(handle)) { 126 struct proglst *pl; 127 SVCXPRT *svcxprt; 128 int madenow; 129 uint_t recvsz; 130 char *xdrbuf; 131 char *netid; 132 133 madenow = FALSE; 134 svcxprt = (SVCXPRT *)NULL; 135 for (pl = proglst; pl; pl = pl->p_nxt) 136 if (strcmp(pl->p_netid, nconf->nc_netid) == 0) { 137 svcxprt = pl->p_transp; 138 xdrbuf = pl->p_xdrbuf; 139 recvsz = pl->p_recvsz; 140 netid = pl->p_netid; 141 break; 142 } 143 144 if (svcxprt == (SVCXPRT *)NULL) { 145 struct t_info tinfo; 146 147 svcxprt = svc_tli_create(RPC_ANYFD, nconf, 148 (struct t_bind *)NULL, 0, 0); 149 if (svcxprt == (SVCXPRT *)NULL) 150 continue; 151 if (t_getinfo(svcxprt->xp_fd, &tinfo) == -1) { 152 char errorstr[100]; 153 154 __tli_sys_strerror(errorstr, sizeof (errorstr), 155 t_errno, errno); 156 (void) syslog(LOG_ERR, "%s : %s : %s", 157 rpc_reg_msg, "t_getinfo failed", 158 errorstr); 159 SVC_DESTROY(svcxprt); 160 continue; 161 } 162 if ((recvsz = __rpc_get_t_size(0, tinfo.tsdu)) == 0) { 163 (void) syslog(LOG_ERR, rpc_reg_err, rpc_reg_msg, 164 __reg_err3); 165 SVC_DESTROY(svcxprt); 166 continue; 167 } 168 if (((xdrbuf = malloc((unsigned)recvsz)) == NULL) || 169 ((netid = strdup(nconf->nc_netid)) == NULL)) { 170 (void) syslog(LOG_ERR, rpc_reg_err, rpc_reg_msg, 171 __no_mem_str); 172 SVC_DESTROY(svcxprt); 173 break; 174 } 175 madenow = TRUE; 176 } 177 /* 178 * Check if this (program, version, netid) had already been 179 * registered. The check may save a few RPC calls to rpcbind 180 */ 181 for (pl = proglst; pl; pl = pl->p_nxt) 182 if ((pl->p_prognum == prognum) && 183 (pl->p_versnum == versnum) && 184 (strcmp(pl->p_netid, netid) == 0)) 185 break; 186 if (pl == NULL) { /* Not yet */ 187 (void) rpcb_unset(prognum, versnum, nconf); 188 } else { 189 /* so that svc_reg does not call rpcb_set() */ 190 nconf = NULL; 191 } 192 193 if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) { 194 (void) syslog(LOG_ERR, 195 "%s couldn't register prog %d vers %d for %s", 196 rpc_reg_msg, prognum, versnum, netid); 197 if (madenow) { 198 SVC_DESTROY(svcxprt); 199 free(xdrbuf); 200 free(netid); 201 } 202 continue; 203 } 204 205 pl = (struct proglst *)malloc(sizeof (struct proglst)); 206 if (pl == (struct proglst *)NULL) { 207 (void) syslog(LOG_ERR, rpc_reg_err, rpc_reg_msg, 208 __no_mem_str); 209 if (madenow) { 210 SVC_DESTROY(svcxprt); 211 free(xdrbuf); 212 free(netid); 213 } 214 break; 215 } 216 pl->p_progname = progname; 217 pl->p_prognum = prognum; 218 pl->p_versnum = versnum; 219 pl->p_procnum = procnum; 220 pl->p_inproc = inproc; 221 pl->p_outproc = outproc; 222 pl->p_transp = svcxprt; 223 pl->p_xdrbuf = xdrbuf; 224 pl->p_recvsz = recvsz; 225 pl->p_netid = netid; 226 pl->p_nxt = proglst; 227 proglst = pl; 228 done = TRUE; 229 } 230 __rpc_endconf(handle); 231 mutex_unlock(&proglst_lock); 232 233 if (done == FALSE) { 234 (void) syslog(LOG_ERR, 235 (const char *) "%s cant find suitable transport for %s", 236 rpc_reg_msg, nettype); 237 trace4(TR_rpc_reg, 1, prognum, versnum, procnum); 238 return (-1); 239 } 240 trace4(TR_rpc_reg, 1, prognum, versnum, procnum); 241 return (0); 242 } 243 244 /* 245 * The universal handler for the services registered using registerrpc. 246 * It handles both the connectionless and the connection oriented cases. 247 */ 248 249 static const char __univ_err[] = " prog %d vers %d"; 250 static void 251 universal(rqstp, transp) 252 struct svc_req *rqstp; 253 SVCXPRT *transp; 254 { 255 rpcprog_t prog; 256 rpcvers_t vers; 257 rpcproc_t proc; 258 char *outdata; 259 char *xdrbuf; 260 struct proglst *pl; 261 extern mutex_t proglst_lock; 262 263 /* 264 * enforce "procnum 0 is echo" convention 265 */ 266 trace1(TR_universal, 0); 267 if (rqstp->rq_proc == NULLPROC) { 268 if (svc_sendreply(transp, (xdrproc_t)xdr_void, 269 (char *)NULL) == FALSE) { 270 (void) syslog(LOG_ERR, 271 (const char *) "svc_sendreply failed"); 272 } 273 trace1(TR_universal, 1); 274 return; 275 } 276 prog = rqstp->rq_prog; 277 vers = rqstp->rq_vers; 278 proc = rqstp->rq_proc; 279 mutex_lock(&proglst_lock); 280 for (pl = proglst; pl; pl = pl->p_nxt) 281 if (pl->p_prognum == prog && pl->p_procnum == proc && 282 pl->p_versnum == vers && 283 (strcmp(pl->p_netid, transp->xp_netid) == 0)) { 284 /* decode arguments into a CLEAN buffer */ 285 xdrbuf = pl->p_xdrbuf; 286 /* Zero the arguments: reqd ! */ 287 (void) memset(xdrbuf, 0, pl->p_recvsz); 288 /* 289 * Assuming that sizeof (xdrbuf) would be enough 290 * for the arguments; if not then the program 291 * may bomb. BEWARE! 292 */ 293 if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) { 294 svcerr_decode(transp); 295 mutex_unlock(&proglst_lock); 296 trace1(TR_universal, 1); 297 return; 298 } 299 outdata = (*(pl->p_progname))(xdrbuf); 300 if (outdata == NULL && 301 pl->p_outproc != (xdrproc_t)xdr_void) { 302 /* there was an error */ 303 mutex_unlock(&proglst_lock); 304 trace1(TR_universal, 1); 305 return; 306 } 307 if (!svc_sendreply(transp, pl->p_outproc, outdata)) { 308 (void) syslog(LOG_ERR, (const char *) 309 "rpc: rpc_reg trouble replying to prog %d vers %d", 310 prog, vers); 311 mutex_unlock(&proglst_lock); 312 trace1(TR_universal, 1); 313 return; 314 } 315 /* free the decoded arguments */ 316 (void) svc_freeargs(transp, pl->p_inproc, xdrbuf); 317 mutex_unlock(&proglst_lock); 318 trace1(TR_universal, 1); 319 return; 320 } 321 mutex_unlock(&proglst_lock); 322 /* This should never happen */ 323 (void) syslog(LOG_ERR, (const char *) 324 "rpc: rpc_reg: never registered prog %d vers %d", 325 prog, vers); 326 trace1(TR_universal, 1); 327 } 328