1 /*- 2 * Copyright (c) 2009, Sun Microsystems, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * - Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * - Redistributions in binary form must reproduce the above copyright notice, 10 * this list of conditions and the following disclaimer in the documentation 11 * and/or other materials provided with the distribution. 12 * - Neither the name of Sun Microsystems, Inc. nor the names of its 13 * contributors may be used to endorse or promote products derived 14 * from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 * @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro 29 * @(#)svc_simple.c 2.2 88/08/01 4.0 RPCSRC 30 * $NetBSD: svc_simple.c,v 1.20 2000/07/06 03:10:35 christos Exp $ 31 * $FreeBSD: src/lib/libc/rpc/svc_simple.c,v 1.16 2006/09/09 22:32:07 mbr Exp $ 32 * $DragonFly: src/lib/libc/rpc/svc_simple.c,v 1.3 2005/11/13 12:27:04 swildner Exp $ 33 */ 34 /* 35 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 36 */ 37 38 /* 39 * svc_simple.c 40 * Simplified front end to rpc. 41 */ 42 43 /* 44 * This interface creates a virtual listener for all the services 45 * started thru rpc_reg(). It listens on the same endpoint for 46 * all the services and then executes the corresponding service 47 * for the given prognum and procnum. 48 */ 49 50 #include "namespace.h" 51 #include "reentrant.h" 52 #include <sys/types.h> 53 #include <rpc/rpc.h> 54 #include <rpc/nettype.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <err.h> 59 #include "un-namespace.h" 60 61 #include "rpc_com.h" 62 #include "mt_misc.h" 63 64 static void universal(struct svc_req *, SVCXPRT *); 65 66 static struct proglst { 67 char *(*p_progname)(char *); 68 rpcprog_t p_prognum; 69 rpcvers_t p_versnum; 70 rpcproc_t p_procnum; 71 SVCXPRT *p_transp; 72 char *p_netid; 73 char *p_xdrbuf; 74 int p_recvsz; 75 xdrproc_t p_inproc, p_outproc; 76 struct proglst *p_nxt; 77 } *proglst; 78 79 static const char rpc_reg_err[] = "%s: %s"; 80 static const char rpc_reg_msg[] = "rpc_reg: "; 81 static const char __reg_err1[] = "can't find appropriate transport"; 82 static const char __reg_err2[] = "can't get protocol info"; 83 static const char __reg_err3[] = "unsupported transport size"; 84 static const char __no_mem_str[] = "out of memory"; 85 86 /* 87 * For simplified, easy to use kind of rpc interfaces. 88 * nettype indicates the type of transport on which the service will be 89 * listening. Used for conservation of the system resource. Only one 90 * handle is created for all the services (actually one of each netid) 91 * and same xdrbuf is used for same netid. The size of the arguments 92 * is also limited by the recvsize for that transport, even if it is 93 * a COTS transport. This may be wrong, but for cases like these, they 94 * should not use the simplified interfaces like this. 95 */ 96 97 int 98 rpc_reg(rpcprog_t prognum, /* program number */ 99 rpcvers_t versnum, /* version number */ 100 rpcproc_t procnum, /* procedure number */ 101 char *(*progname)(char *), /* Server routine */ 102 xdrproc_t inproc, xdrproc_t outproc, /* in/out XDR procedures */ 103 char *nettype) /* nettype */ 104 { 105 struct netconfig *nconf; 106 int done = FALSE; 107 void *handle; 108 109 110 if (procnum == NULLPROC) { 111 warnx("%s can't reassign procedure number %u", rpc_reg_msg, 112 NULLPROC); 113 return (-1); 114 } 115 116 if (nettype == NULL) 117 nettype = "netpath"; /* The default behavior */ 118 if ((handle = __rpc_setconf(nettype)) == NULL) { 119 warnx(rpc_reg_err, rpc_reg_msg, __reg_err1); 120 return (-1); 121 } 122 /* VARIABLES PROTECTED BY proglst_lock: proglst */ 123 mutex_lock(&proglst_lock); 124 while ((nconf = __rpc_getconf(handle)) != NULL) { 125 struct proglst *pl; 126 SVCXPRT *svcxprt; 127 int madenow; 128 u_int recvsz; 129 char *xdrbuf; 130 char *netid; 131 132 madenow = FALSE; 133 svcxprt = NULL; 134 recvsz = 0; 135 xdrbuf = netid = NULL; 136 for (pl = proglst; pl; pl = pl->p_nxt) { 137 if (strcmp(pl->p_netid, nconf->nc_netid) == 0) { 138 svcxprt = pl->p_transp; 139 xdrbuf = pl->p_xdrbuf; 140 recvsz = pl->p_recvsz; 141 netid = pl->p_netid; 142 break; 143 } 144 } 145 146 if (svcxprt == NULL) { 147 struct __rpc_sockinfo si; 148 149 svcxprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 150 if (svcxprt == NULL) 151 continue; 152 if (!__rpc_fd2sockinfo(svcxprt->xp_fd, &si)) { 153 warnx(rpc_reg_err, rpc_reg_msg, __reg_err2); 154 SVC_DESTROY(svcxprt); 155 continue; 156 } 157 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, 0); 158 if (recvsz == 0) { 159 warnx(rpc_reg_err, rpc_reg_msg, __reg_err3); 160 SVC_DESTROY(svcxprt); 161 continue; 162 } 163 if (((xdrbuf = malloc((unsigned)recvsz)) == NULL) || 164 ((netid = strdup(nconf->nc_netid)) == NULL)) { 165 warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); 166 if (xdrbuf != NULL) 167 free(xdrbuf); 168 if (netid != NULL) 169 free(netid); 170 SVC_DESTROY(svcxprt); 171 break; 172 } 173 madenow = TRUE; 174 } 175 /* 176 * Check if this (program, version, netid) had already been 177 * registered. The check may save a few RPC calls to rpcbind 178 */ 179 for (pl = proglst; pl; pl = pl->p_nxt) 180 if ((pl->p_prognum == prognum) && 181 (pl->p_versnum == versnum) && 182 (strcmp(pl->p_netid, netid) == 0)) 183 break; 184 if (pl == NULL) { /* Not yet */ 185 rpcb_unset(prognum, versnum, nconf); 186 } else { 187 /* so that svc_reg does not call rpcb_set() */ 188 nconf = NULL; 189 } 190 191 if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) { 192 warnx("%s couldn't register prog %u vers %u for %s", 193 rpc_reg_msg, (unsigned)prognum, 194 (unsigned)versnum, netid); 195 if (madenow) { 196 SVC_DESTROY(svcxprt); 197 free(xdrbuf); 198 free(netid); 199 } 200 continue; 201 } 202 203 pl = malloc(sizeof (struct proglst)); 204 if (pl == NULL) { 205 warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); 206 if (madenow) { 207 SVC_DESTROY(svcxprt); 208 free(xdrbuf); 209 free(netid); 210 } 211 break; 212 } 213 pl->p_progname = progname; 214 pl->p_prognum = prognum; 215 pl->p_versnum = versnum; 216 pl->p_procnum = procnum; 217 pl->p_inproc = inproc; 218 pl->p_outproc = outproc; 219 pl->p_transp = svcxprt; 220 pl->p_xdrbuf = xdrbuf; 221 pl->p_recvsz = recvsz; 222 pl->p_netid = netid; 223 pl->p_nxt = proglst; 224 proglst = pl; 225 done = TRUE; 226 } 227 __rpc_endconf(handle); 228 mutex_unlock(&proglst_lock); 229 230 if (done == FALSE) { 231 warnx("%s can't find suitable transport for %s", 232 rpc_reg_msg, nettype); 233 return (-1); 234 } 235 return (0); 236 } 237 238 /* 239 * The universal handler for the services registered using registerrpc. 240 * It handles both the connectionless and the connection oriented cases. 241 */ 242 243 static void 244 universal(struct svc_req *rqstp, SVCXPRT *transp) 245 { 246 rpcprog_t prog; 247 rpcvers_t vers; 248 rpcproc_t proc; 249 char *outdata; 250 char *xdrbuf; 251 struct proglst *pl; 252 253 /* 254 * enforce "procnum 0 is echo" convention 255 */ 256 if (rqstp->rq_proc == NULLPROC) { 257 if (svc_sendreply(transp, (xdrproc_t) xdr_void, NULL) == 258 FALSE) { 259 warnx("svc_sendreply failed"); 260 } 261 return; 262 } 263 prog = rqstp->rq_prog; 264 vers = rqstp->rq_vers; 265 proc = rqstp->rq_proc; 266 mutex_lock(&proglst_lock); 267 for (pl = proglst; pl; pl = pl->p_nxt) 268 if (pl->p_prognum == prog && pl->p_procnum == proc && 269 pl->p_versnum == vers && 270 (strcmp(pl->p_netid, transp->xp_netid) == 0)) { 271 /* decode arguments into a CLEAN buffer */ 272 xdrbuf = pl->p_xdrbuf; 273 /* Zero the arguments: reqd ! */ 274 memset(xdrbuf, 0, sizeof (pl->p_recvsz)); 275 /* 276 * Assuming that sizeof (xdrbuf) would be enough 277 * for the arguments; if not then the program 278 * may bomb. BEWARE! 279 */ 280 if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) { 281 svcerr_decode(transp); 282 mutex_unlock(&proglst_lock); 283 return; 284 } 285 outdata = (*(pl->p_progname))(xdrbuf); 286 if (outdata == NULL && 287 pl->p_outproc != (xdrproc_t) xdr_void){ 288 /* there was an error */ 289 mutex_unlock(&proglst_lock); 290 return; 291 } 292 if (!svc_sendreply(transp, pl->p_outproc, outdata)) { 293 warnx( 294 "rpc: rpc_reg trouble replying to prog %u vers %u", 295 (unsigned)prog, (unsigned)vers); 296 mutex_unlock(&proglst_lock); 297 return; 298 } 299 /* free the decoded arguments */ 300 svc_freeargs(transp, pl->p_inproc, xdrbuf); 301 mutex_unlock(&proglst_lock); 302 return; 303 } 304 mutex_unlock(&proglst_lock); 305 /* This should never happen */ 306 warnx("rpc: rpc_reg: never registered prog %u vers %u", 307 (unsigned)prog, (unsigned)vers); 308 return; 309 } 310