1 /* $NetBSD: rpcb_svc_4.c,v 1.9 2019/01/03 19:04:21 christos Exp $ */ 2 /* $FreeBSD: head/usr.sbin/rpcbind/rpcb_svc_4.c 258564 2013-11-25 16:44:02Z hrs $ */ 3 4 /*- 5 * Copyright (c) 2009, Sun Microsystems, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * - Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * - Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * - Neither the name of Sun Microsystems, Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 33 */ 34 35 /* #ident "@(#)rpcb_svc_4.c 1.8 93/07/05 SMI" */ 36 37 /* 38 * rpcb_svc_4.c 39 * The server procedure for the version 4 rpcbind. 40 * 41 */ 42 43 #include <sys/types.h> 44 #include <sys/stat.h> 45 #include <rpc/rpc.h> 46 #include <stdio.h> 47 #include <unistd.h> 48 #include <netconfig.h> 49 #include <syslog.h> 50 #include <string.h> 51 #include <stdlib.h> 52 #include "rpcbind.h" 53 54 static void *rpcbproc_getaddr_4_local(void *, struct svc_req *, SVCXPRT *, 55 rpcvers_t); 56 static void *rpcbproc_getversaddr_4_local(void *, struct svc_req *, SVCXPRT *, 57 rpcvers_t); 58 static void *rpcbproc_getaddrlist_4_local(void *, struct svc_req *, SVCXPRT *, 59 rpcvers_t); 60 static void free_rpcb_entry_list(rpcb_entry_list_ptr *); 61 static void *rpcbproc_dump_4_local(void *, struct svc_req *, SVCXPRT *, 62 rpcvers_t); 63 64 /* 65 * Called by svc_getreqset. There is a separate server handle for 66 * every transport that it waits on. 67 */ 68 void 69 rpcb_service_4(struct svc_req *rqstp, SVCXPRT *transp) 70 { 71 union { 72 rpcb rpcbproc_set_4_arg; 73 rpcb rpcbproc_unset_4_arg; 74 rpcb rpcbproc_getaddr_4_local_arg; 75 char *rpcbproc_uaddr2taddr_4_arg; 76 struct netbuf rpcbproc_taddr2uaddr_4_arg; 77 } argument; 78 char *result; 79 xdrproc_t xdr_argument, xdr_result; 80 void *(*local)(void *, struct svc_req *, SVCXPRT *, rpcvers_t); 81 82 rpcbs_procinfo(RPCBVERS_4_STAT, rqstp->rq_proc); 83 84 switch (rqstp->rq_proc) { 85 case NULLPROC: 86 /* 87 * Null proc call 88 */ 89 #ifdef RPCBIND_DEBUG 90 if (debugging) 91 fprintf(stderr, "RPCBPROC_NULL\n"); 92 #endif 93 check_access(transp, rqstp->rq_proc, NULL, RPCBVERS4); 94 (void) svc_sendreply(transp, (xdrproc_t) xdr_void, NULL); 95 return; 96 97 case RPCBPROC_SET: 98 /* 99 * Check to see whether the message came from 100 * loopback transports (for security reasons) 101 */ 102 xdr_argument = (xdrproc_t)xdr_rpcb; 103 xdr_result = (xdrproc_t)xdr_bool; 104 local = rpcbproc_set_com; 105 break; 106 107 case RPCBPROC_UNSET: 108 /* 109 * Check to see whether the message came from 110 * loopback transports (for security reasons) 111 */ 112 xdr_argument = (xdrproc_t)xdr_rpcb; 113 xdr_result = (xdrproc_t)xdr_bool; 114 local = rpcbproc_unset_com; 115 break; 116 117 case RPCBPROC_GETADDR: 118 xdr_argument = (xdrproc_t)xdr_rpcb; 119 xdr_result = (xdrproc_t)xdr_wrapstring; 120 local = rpcbproc_getaddr_4_local; 121 break; 122 123 case RPCBPROC_GETVERSADDR: 124 #ifdef RPCBIND_DEBUG 125 if (debugging) 126 fprintf(stderr, "RPCBPROC_GETVERSADDR\n"); 127 #endif 128 xdr_argument = (xdrproc_t)xdr_rpcb; 129 xdr_result = (xdrproc_t)xdr_wrapstring; 130 local = rpcbproc_getversaddr_4_local; 131 break; 132 133 case RPCBPROC_DUMP: 134 #ifdef RPCBIND_DEBUG 135 if (debugging) 136 fprintf(stderr, "RPCBPROC_DUMP\n"); 137 #endif 138 xdr_argument = (xdrproc_t)xdr_void; 139 xdr_result = (xdrproc_t)xdr_rpcblist_ptr; 140 local = rpcbproc_dump_4_local; 141 break; 142 143 case RPCBPROC_INDIRECT: 144 #ifdef RPCBIND_DEBUG 145 if (debugging) 146 fprintf(stderr, "RPCBPROC_INDIRECT\n"); 147 #endif 148 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4); 149 return; 150 151 /* case RPCBPROC_CALLIT: */ 152 case RPCBPROC_BCAST: 153 #ifdef RPCBIND_DEBUG 154 if (debugging) 155 fprintf(stderr, "RPCBPROC_BCAST\n"); 156 #endif 157 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4); 158 return; 159 160 case RPCBPROC_GETTIME: 161 #ifdef RPCBIND_DEBUG 162 if (debugging) 163 fprintf(stderr, "RPCBPROC_GETTIME\n"); 164 #endif 165 xdr_argument = (xdrproc_t)xdr_void; 166 xdr_result = (xdrproc_t)xdr_u_long; 167 local = rpcbproc_gettime_com; 168 break; 169 170 case RPCBPROC_UADDR2TADDR: 171 #ifdef RPCBIND_DEBUG 172 if (debugging) 173 fprintf(stderr, "RPCBPROC_UADDR2TADDR\n"); 174 #endif 175 xdr_argument = (xdrproc_t)xdr_wrapstring; 176 xdr_result = (xdrproc_t)xdr_netbuf; 177 local = rpcbproc_uaddr2taddr_com; 178 break; 179 180 case RPCBPROC_TADDR2UADDR: 181 #ifdef RPCBIND_DEBUG 182 if (debugging) 183 fprintf(stderr, "RPCBPROC_TADDR2UADDR\n"); 184 #endif 185 xdr_argument = (xdrproc_t)xdr_netbuf; 186 xdr_result = (xdrproc_t)xdr_wrapstring; 187 local = rpcbproc_taddr2uaddr_com; 188 break; 189 190 case RPCBPROC_GETADDRLIST: 191 #ifdef RPCBIND_DEBUG 192 if (debugging) 193 fprintf(stderr, "RPCBPROC_GETADDRLIST\n"); 194 #endif 195 xdr_argument = (xdrproc_t)xdr_rpcb; 196 xdr_result = (xdrproc_t)xdr_rpcb_entry_list_ptr; 197 local = rpcbproc_getaddrlist_4_local; 198 break; 199 200 case RPCBPROC_GETSTAT: 201 #ifdef RPCBIND_DEBUG 202 if (debugging) 203 fprintf(stderr, "RPCBPROC_GETSTAT\n"); 204 #endif 205 xdr_argument = (xdrproc_t)xdr_void; 206 xdr_result = (xdrproc_t)xdr_rpcb_stat_byvers; 207 local = rpcbproc_getstat; 208 break; 209 210 default: 211 svcerr_noproc(transp); 212 return; 213 } 214 memset((char *)&argument, 0, sizeof (argument)); 215 if (!svc_getargs(transp, (xdrproc_t) xdr_argument, 216 (char *)&argument)) { 217 svcerr_decode(transp); 218 if (debugging) 219 (void) fprintf(stderr, "rpcbind: could not decode\n"); 220 return; 221 } 222 if (!check_access(transp, rqstp->rq_proc, &argument, RPCBVERS4)) { 223 svcerr_weakauth(transp); 224 goto done; 225 } 226 result = (*local)(&argument, rqstp, transp, RPCBVERS4); 227 if (result != NULL && !svc_sendreply(transp, (xdrproc_t) xdr_result, 228 result)) { 229 svcerr_systemerr(transp); 230 if (debugging) { 231 (void) fprintf(stderr, "rpcbind: svc_sendreply\n"); 232 if (doabort) { 233 rpcbind_abort(); 234 } 235 } 236 } 237 done: 238 if (!svc_freeargs(transp, (xdrproc_t) xdr_argument, 239 (char *)&argument)) { 240 if (debugging) { 241 (void) fprintf(stderr, "unable to free arguments\n"); 242 if (doabort) { 243 rpcbind_abort(); 244 } 245 } 246 } 247 return; 248 } 249 250 /* 251 * Lookup the mapping for a program, version and return its 252 * address. Assuming that the caller wants the address of the 253 * server running on the transport on which the request came. 254 * Even if a service with a different version number is available, 255 * it will return that address. The client should check with an 256 * clnt_call to verify whether the service is the one that is desired. 257 * We also try to resolve the universal address in terms of 258 * address of the caller. 259 */ 260 /* ARGSUSED */ 261 static void * 262 rpcbproc_getaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 263 rpcvers_t rpcbversnum __unused) 264 { 265 RPCB *regp = (RPCB *)arg; 266 #ifdef RPCBIND_DEBUG 267 if (debugging) { 268 char *uaddr; 269 270 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), 271 svc_getrpccaller(transp)); 272 fprintf(stderr, "RPCB_GETADDR req for (%lu, %lu, %s) from %s: ", 273 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 274 regp->r_netid, uaddr); 275 free(uaddr); 276 } 277 #endif 278 return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4, 279 RPCB_ALLVERS)); 280 } 281 282 /* 283 * Lookup the mapping for a program, version and return its 284 * address. Assuming that the caller wants the address of the 285 * server running on the transport on which the request came. 286 * 287 * We also try to resolve the universal address in terms of 288 * address of the caller. 289 */ 290 /* ARGSUSED */ 291 static void * 292 rpcbproc_getversaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 293 rpcvers_t versnum __unused) 294 { 295 RPCB *regp = (RPCB *)arg; 296 #ifdef RPCBIND_DEBUG 297 if (debugging) { 298 char *uaddr; 299 300 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), 301 svc_getrpccaller(transp)); 302 fprintf(stderr, "RPCB_GETVERSADDR rqst for (%lu, %lu, %s)" 303 " from %s : ", 304 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 305 regp->r_netid, uaddr); 306 free(uaddr); 307 } 308 #endif 309 return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4, 310 RPCB_ONEVERS)); 311 } 312 313 /* 314 * Lookup the mapping for a program, version and return the 315 * addresses for all transports in the current transport family. 316 * We return a merged address. 317 */ 318 /* ARGSUSED */ 319 static void * 320 rpcbproc_getaddrlist_4_local(void *arg, struct svc_req *rqstp __unused, 321 SVCXPRT *transp, rpcvers_t versnum __unused) 322 { 323 RPCB *regp = (RPCB *)arg; 324 static rpcb_entry_list_ptr rlist; 325 register rpcblist_ptr rbl; 326 rpcb_entry_list_ptr rp, tail; 327 rpcprog_t prog; 328 rpcvers_t vers; 329 rpcb_entry *a; 330 struct netconfig *nconf; 331 struct netconfig *reg_nconf; 332 char *saddr, *maddr = NULL; 333 334 free_rpcb_entry_list(&rlist); 335 tail = NULL; 336 prog = regp->r_prog; 337 vers = regp->r_vers; 338 reg_nconf = rpcbind_get_conf(transp->xp_netid); 339 if (reg_nconf == NULL) 340 return (NULL); 341 if (*(regp->r_addr) != '\0') { 342 saddr = regp->r_addr; 343 } else { 344 saddr = NULL; 345 } 346 #ifdef RPCBIND_DEBUG 347 if (debugging) { 348 fprintf(stderr, "r_addr: %s r_netid: %s nc_protofmly: %s\n", 349 regp->r_addr, regp->r_netid, reg_nconf->nc_protofmly); 350 } 351 #endif 352 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 353 if ((rbl->rpcb_map.r_prog == prog) && 354 (rbl->rpcb_map.r_vers == vers)) { 355 nconf = rpcbind_get_conf(rbl->rpcb_map.r_netid); 356 if (nconf == NULL) 357 goto fail; 358 if (strcmp(nconf->nc_protofmly, reg_nconf->nc_protofmly) 359 != 0) { 360 continue; /* not same proto family */ 361 } 362 #ifdef RPCBIND_DEBUG 363 if (debugging) 364 fprintf(stderr, "\tmerge with: %s\n", 365 rbl->rpcb_map.r_addr); 366 #endif 367 if ((maddr = mergeaddr(transp, rbl->rpcb_map.r_netid, 368 rbl->rpcb_map.r_addr, saddr)) == NULL) { 369 #ifdef RPCBIND_DEBUG 370 if (debugging) 371 fprintf(stderr, " FAILED\n"); 372 #endif 373 continue; 374 } else if (!maddr[0]) { 375 #ifdef RPCBIND_DEBUG 376 if (debugging) 377 fprintf(stderr, " SUCCEEDED, but port died - maddr: nullstring\n"); 378 #endif 379 /* The server died. Unset this combination */ 380 delete_prog(regp->r_prog); 381 continue; 382 } 383 #ifdef RPCBIND_DEBUG 384 if (debugging) 385 fprintf(stderr, " SUCCEEDED maddr: %s\n", maddr); 386 #endif 387 /* 388 * Add it to rlist. 389 */ 390 rp = malloc(sizeof(*rp)); 391 if (rp == NULL) 392 goto fail; 393 a = &rp->rpcb_entry_map; 394 a->r_maddr = maddr; 395 a->r_nc_netid = nconf->nc_netid; 396 a->r_nc_semantics = nconf->nc_semantics; 397 a->r_nc_protofmly = nconf->nc_protofmly; 398 a->r_nc_proto = nconf->nc_proto; 399 rp->rpcb_entry_next = NULL; 400 if (rlist == NULL) { 401 rlist = rp; 402 tail = rp; 403 } else if (tail) { 404 tail->rpcb_entry_next = rp; 405 tail = rp; 406 } 407 rp = NULL; 408 } 409 } 410 #ifdef RPCBIND_DEBUG 411 if (debugging) { 412 for (rp = rlist; rp; rp = rp->rpcb_entry_next) { 413 fprintf(stderr, "\t%s %s\n", rp->rpcb_entry_map.r_maddr, 414 rp->rpcb_entry_map.r_nc_proto); 415 } 416 } 417 #endif 418 /* 419 * XXX: getaddrlist info is also being stuffed into getaddr. 420 * Perhaps wrong, but better than it not getting counted at all. 421 */ 422 rpcbs_getaddr(RPCBVERS4 - 2, prog, vers, transp->xp_netid, maddr); 423 return (void *)&rlist; 424 425 fail: free_rpcb_entry_list(&rlist); 426 return (NULL); 427 } 428 429 /* 430 * Free only the allocated structure, rest is all a pointer to some 431 * other data somewhere else. 432 */ 433 static void 434 free_rpcb_entry_list(rpcb_entry_list_ptr *rlistp) 435 { 436 register rpcb_entry_list_ptr rbl, tmp; 437 438 for (rbl = *rlistp; rbl != NULL; ) { 439 tmp = rbl; 440 rbl = rbl->rpcb_entry_next; 441 free((char *)tmp->rpcb_entry_map.r_maddr); 442 free((char *)tmp); 443 } 444 *rlistp = NULL; 445 } 446 447 /* ARGSUSED */ 448 static void * 449 rpcbproc_dump_4_local(void *arg __unused, struct svc_req *req __unused, 450 SVCXPRT *xprt __unused, rpcvers_t versnum __unused) 451 { 452 return ((void *)&list_rbl); 453 } 454
Indexes created Mon Sep 22 05:09:51 GMT 2025