rpcb_svc_4.c revision 74462
1/* 2 * $NetBSD: rpcb_svc_4.c,v 1.1 2000/06/02 23:15:41 fvdl Exp $ 3 * $FreeBSD: head/usr.sbin/rpcbind/rpcb_svc_4.c 74462 2001-03-19 12:50:13Z alfred $ 4 */ 5 6/* 7 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 8 * unrestricted use provided that this legend is included on all tape 9 * media and as a part of the software program in whole or part. Users 10 * may copy or modify Sun RPC without charge, but are not authorized 11 * to license or distribute it to anyone else except as part of a product or 12 * program developed by the user. 13 * 14 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 15 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 17 * 18 * Sun RPC is provided with no support and without any obligation on the 19 * part of Sun Microsystems, Inc. to assist in its use, correction, 20 * modification or enhancement. 21 * 22 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 23 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 24 * OR ANY PART THEREOF. 25 * 26 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 27 * or profits or other special, indirect and consequential damages, even if 28 * Sun has been advised of the possibility of such damages. 29 * 30 * Sun Microsystems, Inc. 31 * 2550 Garcia Avenue 32 * Mountain View, California 94043 33 */ 34/* 35 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 36 */ 37 38/* #ident "@(#)rpcb_svc_4.c 1.8 93/07/05 SMI" */ 39 40/* 41 * rpcb_svc_4.c 42 * The server procedure for the version 4 rpcbind. 43 * 44 */ 45 46#include <sys/types.h> 47#include <sys/stat.h> 48#include <rpc/rpc.h> 49#include <stdio.h> 50#include <unistd.h> 51#include <netconfig.h> 52#include <syslog.h> 53#include <string.h> 54#include <stdlib.h> 55#include "rpcbind.h" 56 57static void *rpcbproc_getaddr_4_local __P((void *, struct svc_req *, SVCXPRT *, 58 rpcvers_t)); 59static void *rpcbproc_getversaddr_4_local __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t)); 60static void *rpcbproc_getaddrlist_4_local 61 __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t)); 62static void free_rpcb_entry_list __P((rpcb_entry_list_ptr *)); 63static void *rpcbproc_dump_4_local __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t)); 64 65/* 66 * Called by svc_getreqset. There is a separate server handle for 67 * every transport that it waits on. 68 */ 69void 70rpcb_service_4(struct svc_req *rqstp, SVCXPRT *transp) 71{ 72 union { 73 rpcb rpcbproc_set_4_arg; 74 rpcb rpcbproc_unset_4_arg; 75 rpcb rpcbproc_getaddr_4_local_arg; 76 char *rpcbproc_uaddr2taddr_4_arg; 77 struct netbuf rpcbproc_taddr2uaddr_4_arg; 78 } argument; 79 char *result; 80 xdrproc_t xdr_argument, xdr_result; 81 void *(*local) __P((void *, struct svc_req *, SVCXPRT *, rpcvers_t)); 82 83 rpcbs_procinfo(RPCBVERS_4_STAT, rqstp->rq_proc); 84 85 switch (rqstp->rq_proc) { 86 case NULLPROC: 87 /* 88 * Null proc call 89 */ 90#ifdef RPCBIND_DEBUG 91 if (debugging) 92 fprintf(stderr, "RPCBPROC_NULL\n"); 93#endif 94 check_access(transp, rqstp->rq_proc, NULL, RPCBVERS4); 95 (void) svc_sendreply(transp, (xdrproc_t) xdr_void, 96 (char *)NULL); 97 return; 98 99 case RPCBPROC_SET: 100 /* 101 * Check to see whether the message came from 102 * loopback transports (for security reasons) 103 */ 104 xdr_argument = (xdrproc_t)xdr_rpcb; 105 xdr_result = (xdrproc_t)xdr_bool; 106 local = rpcbproc_set_com; 107 break; 108 109 case RPCBPROC_UNSET: 110 /* 111 * Check to see whether the message came from 112 * loopback transports (for security reasons) 113 */ 114 xdr_argument = (xdrproc_t)xdr_rpcb; 115 xdr_result = (xdrproc_t)xdr_bool; 116 local = rpcbproc_unset_com; 117 break; 118 119 case RPCBPROC_GETADDR: 120 xdr_argument = (xdrproc_t)xdr_rpcb; 121 xdr_result = (xdrproc_t)xdr_wrapstring; 122 local = rpcbproc_getaddr_4_local; 123 break; 124 125 case RPCBPROC_GETVERSADDR: 126#ifdef RPCBIND_DEBUG 127 if (debugging) 128 fprintf(stderr, "RPCBPROC_GETVERSADDR\n"); 129#endif 130 xdr_argument = (xdrproc_t)xdr_rpcb; 131 xdr_result = (xdrproc_t)xdr_wrapstring; 132 local = rpcbproc_getversaddr_4_local; 133 break; 134 135 case RPCBPROC_DUMP: 136#ifdef RPCBIND_DEBUG 137 if (debugging) 138 fprintf(stderr, "RPCBPROC_DUMP\n"); 139#endif 140 xdr_argument = (xdrproc_t)xdr_void; 141 xdr_result = (xdrproc_t)xdr_rpcblist_ptr; 142 local = rpcbproc_dump_4_local; 143 break; 144 145 case RPCBPROC_INDIRECT: 146#ifdef RPCBIND_DEBUG 147 if (debugging) 148 fprintf(stderr, "RPCBPROC_INDIRECT\n"); 149#endif 150 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4); 151 return; 152 153/* case RPCBPROC_CALLIT: */ 154 case RPCBPROC_BCAST: 155#ifdef RPCBIND_DEBUG 156 if (debugging) 157 fprintf(stderr, "RPCBPROC_BCAST\n"); 158#endif 159 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4); 160 return; 161 162 case RPCBPROC_GETTIME: 163#ifdef RPCBIND_DEBUG 164 if (debugging) 165 fprintf(stderr, "RPCBPROC_GETTIME\n"); 166#endif 167 xdr_argument = (xdrproc_t)xdr_void; 168 xdr_result = (xdrproc_t)xdr_u_long; 169 local = rpcbproc_gettime_com; 170 break; 171 172 case RPCBPROC_UADDR2TADDR: 173#ifdef RPCBIND_DEBUG 174 if (debugging) 175 fprintf(stderr, "RPCBPROC_UADDR2TADDR\n"); 176#endif 177 xdr_argument = (xdrproc_t)xdr_wrapstring; 178 xdr_result = (xdrproc_t)xdr_netbuf; 179 local = rpcbproc_uaddr2taddr_com; 180 break; 181 182 case RPCBPROC_TADDR2UADDR: 183#ifdef RPCBIND_DEBUG 184 if (debugging) 185 fprintf(stderr, "RPCBPROC_TADDR2UADDR\n"); 186#endif 187 xdr_argument = (xdrproc_t)xdr_netbuf; 188 xdr_result = (xdrproc_t)xdr_wrapstring; 189 local = rpcbproc_taddr2uaddr_com; 190 break; 191 192 case RPCBPROC_GETADDRLIST: 193#ifdef RPCBIND_DEBUG 194 if (debugging) 195 fprintf(stderr, "RPCBPROC_GETADDRLIST\n"); 196#endif 197 xdr_argument = (xdrproc_t)xdr_rpcb; 198 xdr_result = (xdrproc_t)xdr_rpcb_entry_list_ptr; 199 local = rpcbproc_getaddrlist_4_local; 200 break; 201 202 case RPCBPROC_GETSTAT: 203#ifdef RPCBIND_DEBUG 204 if (debugging) 205 fprintf(stderr, "RPCBPROC_GETSTAT\n"); 206#endif 207 xdr_argument = (xdrproc_t)xdr_void; 208 xdr_result = (xdrproc_t)xdr_rpcb_stat_byvers; 209 local = rpcbproc_getstat; 210 break; 211 212 default: 213 svcerr_noproc(transp); 214 return; 215 } 216 memset((char *)&argument, 0, sizeof (argument)); 217 if (!svc_getargs(transp, (xdrproc_t) xdr_argument, 218 (char *)&argument)) { 219 svcerr_decode(transp); 220 if (debugging) 221 (void) fprintf(stderr, "rpcbind: could not decode\n"); 222 return; 223 } 224 if (!check_access(transp, rqstp->rq_proc, &argument, RPCBVERS4)) { 225 svcerr_weakauth(transp); 226 goto done; 227 } 228 result = (*local)(&argument, rqstp, transp, RPCBVERS4); 229 if (result != NULL && !svc_sendreply(transp, (xdrproc_t) xdr_result, 230 result)) { 231 svcerr_systemerr(transp); 232 if (debugging) { 233 (void) fprintf(stderr, "rpcbind: svc_sendreply\n"); 234 if (doabort) { 235 rpcbind_abort(); 236 } 237 } 238 } 239done: 240 if (!svc_freeargs(transp, (xdrproc_t) xdr_argument, 241 (char *)&argument)) { 242 if (debugging) { 243 (void) fprintf(stderr, "unable to free arguments\n"); 244 if (doabort) { 245 rpcbind_abort(); 246 } 247 } 248 } 249 return; 250} 251 252/* 253 * Lookup the mapping for a program, version and return its 254 * address. Assuming that the caller wants the address of the 255 * server running on the transport on which the request came. 256 * Even if a service with a different version number is available, 257 * it will return that address. The client should check with an 258 * clnt_call to verify whether the service is the one that is desired. 259 * We also try to resolve the universal address in terms of 260 * address of the caller. 261 */ 262/* ARGSUSED */ 263static void * 264rpcbproc_getaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 265 rpcvers_t rpcbversnum) 266{ 267 RPCB *regp = (RPCB *)arg; 268#ifdef RPCBIND_DEBUG 269 if (debugging) { 270 char *uaddr; 271 272 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), 273 svc_getrpccaller(transp)); 274 fprintf(stderr, "RPCB_GETADDR req for (%lu, %lu, %s) from %s: ", 275 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 276 regp->r_netid, uaddr); 277 free(uaddr); 278 } 279#endif 280 return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4, 281 RPCB_ALLVERS)); 282} 283 284/* 285 * Lookup the mapping for a program, version and return its 286 * address. Assuming that the caller wants the address of the 287 * server running on the transport on which the request came. 288 * 289 * We also try to resolve the universal address in terms of 290 * address of the caller. 291 */ 292/* ARGSUSED */ 293static void * 294rpcbproc_getversaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 295 rpcvers_t versnum) 296{ 297 RPCB *regp = (RPCB *)arg; 298#ifdef RPCBIND_DEBUG 299 if (debugging) { 300 char *uaddr; 301 302 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), 303 svc_getrpccaller(transp)); 304 fprintf(stderr, "RPCB_GETVERSADDR rqst for (%lu, %lu, %s)" 305 " from %s : ", 306 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 307 regp->r_netid, uaddr); 308 free(uaddr); 309 } 310#endif 311 return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4, 312 RPCB_ONEVERS)); 313} 314 315/* 316 * Lookup the mapping for a program, version and return the 317 * addresses for all transports in the current transport family. 318 * We return a merged address. 319 */ 320/* ARGSUSED */ 321static void * 322rpcbproc_getaddrlist_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 323 rpcvers_t versnum) 324{ 325 RPCB *regp = (RPCB *)arg; 326 static rpcb_entry_list_ptr rlist; 327 register rpcblist_ptr rbl; 328 rpcb_entry_list_ptr rp, tail; 329 rpcprog_t prog; 330 rpcvers_t vers; 331 rpcb_entry *a; 332 struct netconfig *nconf; 333 struct netconfig *reg_nconf; 334 char *saddr, *maddr = NULL; 335 336 free_rpcb_entry_list(&rlist); 337 prog = regp->r_prog; 338 vers = regp->r_vers; 339 reg_nconf = rpcbind_get_conf(transp->xp_netid); 340 if (reg_nconf == NULL) 341 return (NULL); 342 if (*(regp->r_addr) != '\0') { 343 saddr = regp->r_addr; 344 } else { 345 saddr = NULL; 346 } 347#ifdef RPCBIND_DEBUG 348 if (debugging) { 349 fprintf(stderr, "r_addr: %s r_netid: %s nc_protofmly: %s\n", 350 regp->r_addr, regp->r_netid, reg_nconf->nc_protofmly); 351 } 352#endif 353 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 354 if ((rbl->rpcb_map.r_prog == prog) && 355 (rbl->rpcb_map.r_vers == vers)) { 356 nconf = rpcbind_get_conf(rbl->rpcb_map.r_netid); 357 if (nconf == NULL) 358 goto fail; 359 if (strcmp(nconf->nc_protofmly, reg_nconf->nc_protofmly) 360 != 0) { 361 continue; /* not same proto family */ 362 } 363#ifdef RPCBIND_DEBUG 364 if (debugging) 365 fprintf(stderr, "\tmerge with: %s", 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 = (rpcb_entry_list_ptr) 391 malloc((u_int)sizeof (rpcb_entry_list)); 392 if (rp == NULL) 393 goto fail; 394 a = &rp->rpcb_entry_map; 395 a->r_maddr = maddr; 396 a->r_nc_netid = nconf->nc_netid; 397 a->r_nc_semantics = nconf->nc_semantics; 398 a->r_nc_protofmly = nconf->nc_protofmly; 399 a->r_nc_proto = nconf->nc_proto; 400 rp->rpcb_entry_next = NULL; 401 if (rlist == NULL) { 402 rlist = rp; 403 tail = rp; 404 } else { 405 tail->rpcb_entry_next = rp; 406 tail = rp; 407 } 408 rp = NULL; 409 } 410 } 411#ifdef RPCBIND_DEBUG 412 if (debugging) { 413 for (rp = rlist; rp; rp = rp->rpcb_entry_next) { 414 fprintf(stderr, "\t%s %s\n", rp->rpcb_entry_map.r_maddr, 415 rp->rpcb_entry_map.r_nc_proto); 416 } 417 } 418#endif 419 /* 420 * XXX: getaddrlist info is also being stuffed into getaddr. 421 * Perhaps wrong, but better than it not getting counted at all. 422 */ 423 rpcbs_getaddr(RPCBVERS4 - 2, prog, vers, transp->xp_netid, maddr); 424 return (void *)&rlist; 425 426fail: free_rpcb_entry_list(&rlist); 427 return (NULL); 428} 429 430/* 431 * Free only the allocated structure, rest is all a pointer to some 432 * other data somewhere else. 433 */ 434static void 435free_rpcb_entry_list(rpcb_entry_list_ptr *rlistp) 436{ 437 register rpcb_entry_list_ptr rbl, tmp; 438 439 for (rbl = *rlistp; rbl != NULL; ) { 440 tmp = rbl; 441 rbl = rbl->rpcb_entry_next; 442 free((char *)tmp->rpcb_entry_map.r_maddr); 443 free((char *)tmp); 444 } 445 *rlistp = NULL; 446} 447 448/* ARGSUSED */ 449static void * 450rpcbproc_dump_4_local(void *arg, struct svc_req *req, SVCXPRT *xprt, 451 rpcvers_t versnum) 452{ 453 return ((void *)&list_rbl); 454} 455