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 /* 29 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 30 */ 31 32 //#include <sys/cdefs.h> 33 34 /* 35 * svc_simple.c 36 * Simplified front end to rpc. 37 */ 38 39 /* 40 * This interface creates a virtual listener for all the services 41 * started thru rpc_reg(). It listens on the same endpoint for 42 * all the services and then executes the corresponding service 43 * for the given prognum and procnum. 44 */ 45 #include <wintirpc.h> 46 //#include <pthread.h> 47 #include <reentrant.h> 48 #include <sys/types.h> 49 #include <rpc/rpc.h> 50 #include <rpc/nettype.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 //#include <err.h> 55 56 #include "rpc_com.h" 57 58 static void universal(struct svc_req *, SVCXPRT *); 59 60 static struct proglst { 61 char *(*p_progname)(char *); 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 const char rpc_reg_err[] = "%s: %s"; 74 static const char rpc_reg_msg[] = "rpc_reg: "; 75 static const char __reg_err1[] = "can't find appropriate transport"; 76 static const char __reg_err2[] = "can't get protocol info"; 77 static const char __reg_err3[] = "unsupported transport size"; 78 static const char __no_mem_str[] = "out of memory"; 79 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)(char *); /* Server routine */ 97 xdrproc_t inproc, outproc; /* in/out XDR procedures */ 98 char *nettype; /* nettype */ 99 { 100 struct netconfig *nconf; 101 int done = FALSE; 102 void *handle; 103 extern mutex_t proglst_lock; 104 105 if (procnum == NULLPROC) { 106 // XXXwarnx("%s can't reassign procedure number %u", rpc_reg_msg, 107 // NULLPROC); 108 return (-1); 109 } 110 111 if (nettype == NULL) 112 nettype = "netpath"; /* The default behavior */ 113 if ((handle = __rpc_setconf(nettype)) == NULL) { 114 // XXX warnx(rpc_reg_err, rpc_reg_msg, __reg_err1); 115 return (-1); 116 } 117 /* VARIABLES PROTECTED BY proglst_lock: proglst */ 118 mutex_lock(&proglst_lock); 119 while ((nconf = __rpc_getconf(handle)) != NULL) { 120 struct proglst *pl; 121 SVCXPRT *svcxprt; 122 int madenow; 123 u_int recvsz; 124 char *xdrbuf; 125 char *netid; 126 127 madenow = FALSE; 128 svcxprt = NULL; 129 recvsz = 0; 130 xdrbuf = netid = NULL; 131 for (pl = proglst; pl; pl = pl->p_nxt) { 132 if (strcmp(pl->p_netid, nconf->nc_netid) == 0) { 133 svcxprt = pl->p_transp; 134 xdrbuf = pl->p_xdrbuf; 135 recvsz = pl->p_recvsz; 136 netid = pl->p_netid; 137 break; 138 } 139 } 140 141 if (svcxprt == NULL) { 142 struct __rpc_sockinfo si; 143 144 svcxprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 145 if (svcxprt == NULL) 146 continue; 147 if (!__rpc_fd2sockinfo(svcxprt->xp_fd, &si)) { 148 // XXX warnx(rpc_reg_err, rpc_reg_msg, __reg_err2); 149 SVC_DESTROY(svcxprt); 150 continue; 151 } 152 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, 0); 153 if (recvsz == 0) { 154 // XXX warnx(rpc_reg_err, rpc_reg_msg, __reg_err3); 155 SVC_DESTROY(svcxprt); 156 continue; 157 } 158 if (((xdrbuf = malloc((unsigned)recvsz)) == NULL) || 159 ((netid = strdup(nconf->nc_netid)) == NULL)) { 160 // XXX warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); 161 SVC_DESTROY(svcxprt); 162 break; 163 } 164 madenow = TRUE; 165 } 166 /* 167 * Check if this (program, version, netid) had already been 168 * registered. The check may save a few RPC calls to rpcbind 169 */ 170 for (pl = proglst; pl; pl = pl->p_nxt) 171 if ((pl->p_prognum == prognum) && 172 (pl->p_versnum == versnum) && 173 (strcmp(pl->p_netid, netid) == 0)) 174 break; 175 if (pl == NULL) { /* Not yet */ 176 (void) rpcb_unset(prognum, versnum, nconf); 177 } else { 178 /* so that svc_reg does not call rpcb_set() */ 179 nconf = NULL; 180 } 181 182 if (!svc_reg(svcxprt, prognum, versnum, universal, nconf)) { 183 // XXX warnx("%s couldn't register prog %u vers %u for %s", 184 // rpc_reg_msg, (unsigned)prognum, 185 // (unsigned)versnum, netid); 186 if (madenow) { 187 SVC_DESTROY(svcxprt); 188 free(xdrbuf); 189 free(netid); 190 } 191 continue; 192 } 193 194 pl = malloc(sizeof (struct proglst)); 195 if (pl == NULL) { 196 // XXX warnx(rpc_reg_err, rpc_reg_msg, __no_mem_str); 197 if (madenow) { 198 SVC_DESTROY(svcxprt); 199 free(xdrbuf); 200 free(netid); 201 } 202 break; 203 } 204 pl->p_progname = progname; 205 pl->p_prognum = prognum; 206 pl->p_versnum = versnum; 207 pl->p_procnum = procnum; 208 pl->p_inproc = inproc; 209 pl->p_outproc = outproc; 210 pl->p_transp = svcxprt; 211 pl->p_xdrbuf = xdrbuf; 212 pl->p_recvsz = recvsz; 213 pl->p_netid = netid; 214 pl->p_nxt = proglst; 215 proglst = pl; 216 done = TRUE; 217 } 218 __rpc_endconf(handle); 219 mutex_unlock(&proglst_lock); 220 221 if (done == FALSE) { 222 // XXX warnx("%s cant find suitable transport for %s", 223 // rpc_reg_msg, nettype); 224 return (-1); 225 } 226 return (0); 227 } 228 229 /* 230 * The universal handler for the services registered using registerrpc. 231 * It handles both the connectionless and the connection oriented cases. 232 */ 233 234 static void 235 universal(rqstp, transp) 236 struct svc_req *rqstp; 237 SVCXPRT *transp; 238 { 239 rpcprog_t prog; 240 rpcvers_t vers; 241 rpcproc_t proc; 242 char *outdata; 243 char *xdrbuf; 244 struct proglst *pl; 245 extern mutex_t proglst_lock; 246 247 /* 248 * enforce "procnum 0 is echo" convention 249 */ 250 if (rqstp->rq_proc == NULLPROC) { 251 if (svc_sendreply(transp, (xdrproc_t) xdr_void, NULL) == 252 FALSE) { 253 // XXX warnx("svc_sendreply failed"); 254 } 255 return; 256 } 257 prog = rqstp->rq_prog; 258 vers = rqstp->rq_vers; 259 proc = rqstp->rq_proc; 260 mutex_lock(&proglst_lock); 261 for (pl = proglst; pl; pl = pl->p_nxt) 262 if (pl->p_prognum == prog && pl->p_procnum == proc && 263 pl->p_versnum == vers && 264 (strcmp(pl->p_netid, transp->xp_netid) == 0)) { 265 /* decode arguments into a CLEAN buffer */ 266 xdrbuf = pl->p_xdrbuf; 267 /* Zero the arguments: reqd ! */ 268 (void) memset(xdrbuf, 0, sizeof (pl->p_recvsz)); 269 /* 270 * Assuming that sizeof (xdrbuf) would be enough 271 * for the arguments; if not then the program 272 * may bomb. BEWARE! 273 */ 274 if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) { 275 svcerr_decode(transp); 276 mutex_unlock(&proglst_lock); 277 return; 278 } 279 outdata = (*(pl->p_progname))(xdrbuf); 280 if (outdata == NULL && 281 pl->p_outproc != (xdrproc_t) xdr_void){ 282 /* there was an error */ 283 mutex_unlock(&proglst_lock); 284 return; 285 } 286 if (!svc_sendreply(transp, pl->p_outproc, outdata)) { 287 // XXX warnx( 288 // "rpc: rpc_reg trouble replying to prog %u vers %u", 289 // (unsigned)prog, (unsigned)vers); 290 mutex_unlock(&proglst_lock); 291 return; 292 } 293 /* free the decoded arguments */ 294 (void)svc_freeargs(transp, pl->p_inproc, xdrbuf); 295 mutex_unlock(&proglst_lock); 296 return; 297 } 298 mutex_unlock(&proglst_lock); 299 /* This should never happen */ 300 // XXX warnx("rpc: rpc_reg: never registered prog %u vers %u", 301 // (unsigned)prog, (unsigned)vers); 302 return; 303 } 304