1 /* 2 * $NetBSD: rpcb_svc_4.c,v 1.1 2000/06/02 23:15:41 fvdl Exp $ 3 * $FreeBSD$ 4 */ 5 6 /*- 7 * SPDX-License-Identifier: BSD-3-Clause 8 * 9 * Copyright (c) 2009, Sun Microsystems, Inc. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions are met: 14 * - Redistributions of source code must retain the above copyright notice, 15 * this list of conditions and the following disclaimer. 16 * - Redistributions in binary form must reproduce the above copyright notice, 17 * this list of conditions and the following disclaimer in the documentation 18 * and/or other materials provided with the distribution. 19 * - Neither the name of Sun Microsystems, Inc. nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 /* 36 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 37 */ 38 39 /* #ident "@(#)rpcb_svc_4.c 1.8 93/07/05 SMI" */ 40 41 /* 42 * rpcb_svc_4.c 43 * The server procedure for the version 4 rpcbind. 44 * 45 */ 46 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 #include <rpc/rpc.h> 50 #include <stdio.h> 51 #include <netconfig.h> 52 #include <string.h> 53 #include <stdlib.h> 54 #include "rpcbind.h" 55 56 static void *rpcbproc_getaddr_4_local(void *, struct svc_req *, SVCXPRT *, 57 rpcvers_t); 58 static void *rpcbproc_getversaddr_4_local(void *, struct svc_req *, SVCXPRT *, rpcvers_t); 59 static void *rpcbproc_getaddrlist_4_local 60 (void *, struct svc_req *, SVCXPRT *, rpcvers_t); 61 static void free_rpcb_entry_list(rpcb_entry_list_ptr *); 62 static void *rpcbproc_dump_4_local(void *, struct svc_req *, SVCXPRT *, 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, 95 (char *)NULL); 96 return; 97 98 case RPCBPROC_SET: 99 /* 100 * Check to see whether the message came from 101 * loopback transports (for security reasons) 102 */ 103 xdr_argument = (xdrproc_t)xdr_rpcb; 104 xdr_result = (xdrproc_t)xdr_bool; 105 local = rpcbproc_set_com; 106 break; 107 108 case RPCBPROC_UNSET: 109 /* 110 * Check to see whether the message came from 111 * loopback transports (for security reasons) 112 */ 113 xdr_argument = (xdrproc_t)xdr_rpcb; 114 xdr_result = (xdrproc_t)xdr_bool; 115 local = rpcbproc_unset_com; 116 break; 117 118 case RPCBPROC_GETADDR: 119 xdr_argument = (xdrproc_t)xdr_rpcb; 120 xdr_result = (xdrproc_t)xdr_wrapstring; 121 local = rpcbproc_getaddr_4_local; 122 break; 123 124 case RPCBPROC_GETVERSADDR: 125 #ifdef RPCBIND_DEBUG 126 if (debugging) 127 fprintf(stderr, "RPCBPROC_GETVERSADDR\n"); 128 #endif 129 xdr_argument = (xdrproc_t)xdr_rpcb; 130 xdr_result = (xdrproc_t)xdr_wrapstring; 131 local = rpcbproc_getversaddr_4_local; 132 break; 133 134 case RPCBPROC_DUMP: 135 #ifdef RPCBIND_DEBUG 136 if (debugging) 137 fprintf(stderr, "RPCBPROC_DUMP\n"); 138 #endif 139 xdr_argument = (xdrproc_t)xdr_void; 140 xdr_result = (xdrproc_t)xdr_rpcblist_ptr; 141 local = rpcbproc_dump_4_local; 142 break; 143 144 case RPCBPROC_INDIRECT: 145 #ifdef RPCBIND_DEBUG 146 if (debugging) 147 fprintf(stderr, "RPCBPROC_INDIRECT\n"); 148 #endif 149 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4); 150 return; 151 152 /* case RPCBPROC_CALLIT: */ 153 case RPCBPROC_BCAST: 154 #ifdef RPCBIND_DEBUG 155 if (debugging) 156 fprintf(stderr, "RPCBPROC_BCAST\n"); 157 #endif 158 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4); 159 return; 160 161 case RPCBPROC_GETTIME: 162 #ifdef RPCBIND_DEBUG 163 if (debugging) 164 fprintf(stderr, "RPCBPROC_GETTIME\n"); 165 #endif 166 xdr_argument = (xdrproc_t)xdr_void; 167 xdr_result = (xdrproc_t)xdr_u_long; 168 local = rpcbproc_gettime_com; 169 break; 170 171 case RPCBPROC_UADDR2TADDR: 172 #ifdef RPCBIND_DEBUG 173 if (debugging) 174 fprintf(stderr, "RPCBPROC_UADDR2TADDR\n"); 175 #endif 176 xdr_argument = (xdrproc_t)xdr_wrapstring; 177 xdr_result = (xdrproc_t)xdr_netbuf; 178 local = rpcbproc_uaddr2taddr_com; 179 break; 180 181 case RPCBPROC_TADDR2UADDR: 182 #ifdef RPCBIND_DEBUG 183 if (debugging) 184 fprintf(stderr, "RPCBPROC_TADDR2UADDR\n"); 185 #endif 186 xdr_argument = (xdrproc_t)xdr_netbuf; 187 xdr_result = (xdrproc_t)xdr_wrapstring; 188 local = rpcbproc_taddr2uaddr_com; 189 break; 190 191 case RPCBPROC_GETADDRLIST: 192 #ifdef RPCBIND_DEBUG 193 if (debugging) 194 fprintf(stderr, "RPCBPROC_GETADDRLIST\n"); 195 #endif 196 xdr_argument = (xdrproc_t)xdr_rpcb; 197 xdr_result = (xdrproc_t)xdr_rpcb_entry_list_ptr; 198 local = rpcbproc_getaddrlist_4_local; 199 break; 200 201 case RPCBPROC_GETSTAT: 202 #ifdef RPCBIND_DEBUG 203 if (debugging) 204 fprintf(stderr, "RPCBPROC_GETSTAT\n"); 205 #endif 206 xdr_argument = (xdrproc_t)xdr_void; 207 xdr_result = (xdrproc_t)xdr_rpcb_stat_byvers; 208 local = rpcbproc_getstat; 209 break; 210 211 default: 212 svcerr_noproc(transp); 213 return; 214 } 215 memset((char *)&argument, 0, sizeof (argument)); 216 if (!svc_getargs(transp, (xdrproc_t) xdr_argument, 217 (char *)&argument)) { 218 svcerr_decode(transp); 219 if (debugging) 220 (void) fprintf(stderr, "rpcbind: could not decode\n"); 221 return; 222 } 223 if (!check_access(transp, rqstp->rq_proc, &argument, RPCBVERS4)) { 224 svcerr_weakauth(transp); 225 goto done; 226 } 227 result = (*local)(&argument, rqstp, transp, RPCBVERS4); 228 if (result != NULL && !svc_sendreply(transp, (xdrproc_t) xdr_result, 229 result)) { 230 svcerr_systemerr(transp); 231 if (debugging) { 232 (void) fprintf(stderr, "rpcbind: svc_sendreply\n"); 233 if (doabort) { 234 rpcbind_abort(); 235 } 236 } 237 } 238 done: 239 if (!svc_freeargs(transp, (xdrproc_t) xdr_argument, 240 (char *)&argument)) { 241 if (debugging) { 242 (void) fprintf(stderr, "unable to free arguments\n"); 243 if (doabort) { 244 rpcbind_abort(); 245 } 246 } 247 } 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 (rpcb_entry_list)); 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 { 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