1 /* $NetBSD: rpcb_svc_com.c,v 1.9 2002/11/08 00:16:39 fvdl Exp $ */ 2 /* $FreeBSD$ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (c) 2009, Sun Microsystems, Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions are met: 12 * - Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * - Redistributions in binary form must reproduce the above copyright notice, 15 * this list of conditions and the following disclaimer in the documentation 16 * and/or other materials provided with the distribution. 17 * - Neither the name of Sun Microsystems, Inc. nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 /* 34 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 35 */ 36 37 /* #ident "@(#)rpcb_svc_com.c 1.18 94/05/02 SMI" */ 38 39 /* 40 * rpcb_svc_com.c 41 * The commom server procedure for the rpcbind. 42 */ 43 44 #include <sys/types.h> 45 #include <sys/stat.h> 46 #include <sys/param.h> 47 #include <sys/poll.h> 48 #include <sys/socket.h> 49 #include <rpc/rpc.h> 50 #include <rpc/rpcb_prot.h> 51 #include <rpc/svc_dg.h> 52 #include <assert.h> 53 #include <netconfig.h> 54 #include <errno.h> 55 #include <syslog.h> 56 #include <stdio.h> 57 #include <string.h> 58 #include <stdlib.h> 59 #include <unistd.h> 60 #ifdef PORTMAP 61 #include <netinet/in.h> 62 #include <rpc/rpc_com.h> 63 #include <rpc/pmap_prot.h> 64 #endif /* PORTMAP */ 65 66 #include "rpcbind.h" 67 68 #define RPC_BUF_MAX 65536 /* can be raised if required */ 69 70 static char *nullstring = ""; 71 static int rpcb_rmtcalls; 72 73 struct rmtcallfd_list { 74 int fd; 75 SVCXPRT *xprt; 76 char *netid; 77 struct rmtcallfd_list *next; 78 }; 79 80 #define NFORWARD 64 81 #define MAXTIME_OFF 300 /* 5 minutes */ 82 83 struct finfo { 84 int flag; 85 #define FINFO_ACTIVE 0x1 86 u_int32_t caller_xid; 87 struct netbuf *caller_addr; 88 u_int32_t forward_xid; 89 int forward_fd; 90 char *uaddr; 91 rpcproc_t reply_type; 92 rpcvers_t versnum; 93 time_t time; 94 }; 95 static struct finfo FINFO[NFORWARD]; 96 97 98 static bool_t xdr_encap_parms(XDR *, struct encap_parms *); 99 static bool_t xdr_rmtcall_args(XDR *, struct r_rmtcall_args *); 100 static bool_t xdr_rmtcall_result(XDR *, struct r_rmtcall_args *); 101 static bool_t xdr_opaque_parms(XDR *, struct r_rmtcall_args *); 102 static int find_rmtcallfd_by_netid(char *); 103 static SVCXPRT *find_rmtcallxprt_by_fd(int); 104 static int forward_register(u_int32_t, struct netbuf *, int, char *, 105 rpcproc_t, rpcvers_t, u_int32_t *); 106 static struct finfo *forward_find(u_int32_t); 107 static int free_slot_by_xid(u_int32_t); 108 static int free_slot_by_index(int); 109 static int netbufcmp(struct netbuf *, struct netbuf *); 110 static struct netbuf *netbufdup(struct netbuf *); 111 static void netbuffree(struct netbuf *); 112 static int check_rmtcalls(struct pollfd *, int); 113 static void xprt_set_caller(SVCXPRT *, struct finfo *); 114 static void send_svcsyserr(SVCXPRT *, struct finfo *); 115 static void handle_reply(int, SVCXPRT *); 116 static void find_versions(rpcprog_t, char *, rpcvers_t *, rpcvers_t *); 117 static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *); 118 static char *getowner(SVCXPRT *, char *, size_t); 119 static int add_pmaplist(RPCB *); 120 static int del_pmaplist(RPCB *); 121 122 /* 123 * Set a mapping of program, version, netid 124 */ 125 /* ARGSUSED */ 126 void * 127 rpcbproc_set_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp, 128 rpcvers_t rpcbversnum) 129 { 130 RPCB *regp = (RPCB *)arg; 131 static bool_t ans; 132 char owner[64]; 133 134 #ifdef RPCBIND_DEBUG 135 if (debugging) 136 fprintf(stderr, "RPCB_SET request for (%lu, %lu, %s, %s) : ", 137 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 138 regp->r_netid, regp->r_addr); 139 #endif 140 ans = map_set(regp, getowner(transp, owner, sizeof owner)); 141 #ifdef RPCBIND_DEBUG 142 if (debugging) 143 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 144 #endif 145 /* XXX: should have used some defined constant here */ 146 rpcbs_set(rpcbversnum - 2, ans); 147 return (void *)&ans; 148 } 149 150 bool_t 151 map_set(RPCB *regp, char *owner) 152 { 153 RPCB reg, *a; 154 rpcblist_ptr rbl, fnd; 155 156 reg = *regp; 157 /* 158 * check to see if already used 159 * find_service returns a hit even if 160 * the versions don't match, so check for it 161 */ 162 fnd = find_service(reg.r_prog, reg.r_vers, reg.r_netid); 163 if (fnd && (fnd->rpcb_map.r_vers == reg.r_vers)) { 164 if (!strcmp(fnd->rpcb_map.r_addr, reg.r_addr)) 165 /* 166 * if these match then it is already 167 * registered so just say "OK". 168 */ 169 return (TRUE); 170 else 171 return (FALSE); 172 } 173 /* 174 * add to the end of the list 175 */ 176 rbl = malloc(sizeof (RPCBLIST)); 177 if (rbl == NULL) 178 return (FALSE); 179 a = &(rbl->rpcb_map); 180 a->r_prog = reg.r_prog; 181 a->r_vers = reg.r_vers; 182 a->r_netid = strdup(reg.r_netid); 183 a->r_addr = strdup(reg.r_addr); 184 a->r_owner = strdup(owner); 185 if (!a->r_addr || !a->r_netid || !a->r_owner) { 186 free(a->r_netid); 187 free(a->r_addr); 188 free(a->r_owner); 189 free(rbl); 190 return (FALSE); 191 } 192 rbl->rpcb_next = (rpcblist_ptr)NULL; 193 if (list_rbl == NULL) { 194 list_rbl = rbl; 195 } else { 196 for (fnd = list_rbl; fnd->rpcb_next; 197 fnd = fnd->rpcb_next) 198 ; 199 fnd->rpcb_next = rbl; 200 } 201 #ifdef PORTMAP 202 (void) add_pmaplist(regp); 203 #endif 204 return (TRUE); 205 } 206 207 /* 208 * Unset a mapping of program, version, netid 209 */ 210 /* ARGSUSED */ 211 void * 212 rpcbproc_unset_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp, 213 rpcvers_t rpcbversnum) 214 { 215 RPCB *regp = (RPCB *)arg; 216 static bool_t ans; 217 char owner[64]; 218 219 #ifdef RPCBIND_DEBUG 220 if (debugging) 221 fprintf(stderr, "RPCB_UNSET request for (%lu, %lu, %s) : ", 222 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 223 regp->r_netid); 224 #endif 225 ans = map_unset(regp, getowner(transp, owner, sizeof owner)); 226 #ifdef RPCBIND_DEBUG 227 if (debugging) 228 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 229 #endif 230 /* XXX: should have used some defined constant here */ 231 rpcbs_unset(rpcbversnum - 2, ans); 232 return (void *)&ans; 233 } 234 235 bool_t 236 map_unset(RPCB *regp, char *owner) 237 { 238 int ans = 0; 239 rpcblist_ptr rbl, prev, tmp; 240 241 if (owner == NULL) 242 return (0); 243 244 for (prev = NULL, rbl = list_rbl; rbl; /* cstyle */) { 245 if ((rbl->rpcb_map.r_prog != regp->r_prog) || 246 (rbl->rpcb_map.r_vers != regp->r_vers) || 247 (regp->r_netid[0] && strcasecmp(regp->r_netid, 248 rbl->rpcb_map.r_netid))) { 249 /* both rbl & prev move forwards */ 250 prev = rbl; 251 rbl = rbl->rpcb_next; 252 continue; 253 } 254 /* 255 * Check whether appropriate uid. Unset only 256 * if superuser or the owner itself. 257 */ 258 if (strcmp(owner, "superuser") && 259 strcmp(rbl->rpcb_map.r_owner, owner)) 260 return (0); 261 /* found it; rbl moves forward, prev stays */ 262 ans = 1; 263 tmp = rbl; 264 rbl = rbl->rpcb_next; 265 if (prev == NULL) 266 list_rbl = rbl; 267 else 268 prev->rpcb_next = rbl; 269 free(tmp->rpcb_map.r_addr); 270 free(tmp->rpcb_map.r_netid); 271 free(tmp->rpcb_map.r_owner); 272 free(tmp); 273 } 274 #ifdef PORTMAP 275 if (ans) 276 (void) del_pmaplist(regp); 277 #endif 278 /* 279 * We return 1 either when the entry was not there or it 280 * was able to unset it. It can come to this point only if 281 * atleast one of the conditions is true. 282 */ 283 return (1); 284 } 285 286 void 287 delete_prog(unsigned int prog) 288 { 289 RPCB reg; 290 register rpcblist_ptr rbl; 291 292 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 293 if ((rbl->rpcb_map.r_prog != prog)) 294 continue; 295 if (is_bound(rbl->rpcb_map.r_netid, rbl->rpcb_map.r_addr)) 296 continue; 297 reg.r_prog = rbl->rpcb_map.r_prog; 298 reg.r_vers = rbl->rpcb_map.r_vers; 299 reg.r_netid = strdup(rbl->rpcb_map.r_netid); 300 (void) map_unset(®, "superuser"); 301 free(reg.r_netid); 302 } 303 } 304 305 void * 306 rpcbproc_getaddr_com(RPCB *regp, struct svc_req *rqstp __unused, 307 SVCXPRT *transp, rpcvers_t rpcbversnum, rpcvers_t verstype) 308 { 309 static char *uaddr; 310 char *saddr = NULL; 311 rpcblist_ptr fnd; 312 313 if (uaddr != NULL && uaddr != nullstring) { 314 free(uaddr); 315 uaddr = NULL; 316 } 317 fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid); 318 if (fnd && ((verstype == RPCB_ALLVERS) || 319 (regp->r_vers == fnd->rpcb_map.r_vers))) { 320 if (*(regp->r_addr) != '\0') { /* may contain a hint about */ 321 saddr = regp->r_addr; /* the interface that we */ 322 } /* should use */ 323 if (!(uaddr = mergeaddr(transp, transp->xp_netid, 324 fnd->rpcb_map.r_addr, saddr))) { 325 /* Try whatever we have */ 326 uaddr = strdup(fnd->rpcb_map.r_addr); 327 } else if (!uaddr[0]) { 328 /* 329 * The server died. Unset all versions of this prog. 330 */ 331 delete_prog(regp->r_prog); 332 uaddr = nullstring; 333 } 334 } else { 335 uaddr = nullstring; 336 } 337 #ifdef RPCBIND_DEBUG 338 if (debugging) 339 fprintf(stderr, "getaddr: %s\n", uaddr); 340 #endif 341 /* XXX: should have used some defined constant here */ 342 rpcbs_getaddr(rpcbversnum - 2, regp->r_prog, regp->r_vers, 343 transp->xp_netid, uaddr); 344 return (void *)&uaddr; 345 } 346 347 /* ARGSUSED */ 348 void * 349 rpcbproc_gettime_com(void *arg __unused, struct svc_req *rqstp __unused, 350 SVCXPRT *transp __unused, rpcvers_t rpcbversnum __unused) 351 { 352 static time_t curtime; 353 354 (void) time(&curtime); 355 return (void *)&curtime; 356 } 357 358 /* 359 * Convert uaddr to taddr. Should be used only by 360 * local servers/clients. (kernel level stuff only) 361 */ 362 /* ARGSUSED */ 363 void * 364 rpcbproc_uaddr2taddr_com(void *arg, struct svc_req *rqstp __unused, 365 SVCXPRT *transp, rpcvers_t rpcbversnum __unused) 366 { 367 char **uaddrp = (char **)arg; 368 struct netconfig *nconf; 369 static struct netbuf nbuf; 370 static struct netbuf *taddr; 371 372 netbuffree(taddr); 373 taddr = NULL; 374 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) || 375 ((taddr = uaddr2taddr(nconf, *uaddrp)) == NULL)) { 376 (void) memset((char *)&nbuf, 0, sizeof (struct netbuf)); 377 return (void *)&nbuf; 378 } 379 return (void *)taddr; 380 } 381 382 /* 383 * Convert taddr to uaddr. Should be used only by 384 * local servers/clients. (kernel level stuff only) 385 */ 386 /* ARGSUSED */ 387 void * 388 rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp __unused, 389 SVCXPRT *transp, rpcvers_t rpcbversnum __unused) 390 { 391 struct netbuf *taddr = (struct netbuf *)arg; 392 static char *uaddr; 393 struct netconfig *nconf; 394 395 #ifdef CHEW_FDS 396 int fd; 397 398 if ((fd = open("/dev/null", O_RDONLY)) == -1) { 399 uaddr = (char *)strerror(errno); 400 return (&uaddr); 401 } 402 #endif /* CHEW_FDS */ 403 if (uaddr != NULL && uaddr != nullstring) { 404 free(uaddr); 405 uaddr = NULL; 406 } 407 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) || 408 ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) { 409 uaddr = nullstring; 410 } 411 return (void *)&uaddr; 412 } 413 414 415 static bool_t 416 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp) 417 { 418 return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), 419 RPC_MAXDATASIZE)); 420 } 421 422 /* 423 * XDR remote call arguments. It ignores the address part. 424 * written for XDR_DECODE direction only 425 */ 426 static bool_t 427 xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap) 428 { 429 /* does not get the address or the arguments */ 430 if (xdr_rpcprog(xdrs, &(cap->rmt_prog)) && 431 xdr_rpcvers(xdrs, &(cap->rmt_vers)) && 432 xdr_rpcproc(xdrs, &(cap->rmt_proc))) { 433 return (xdr_encap_parms(xdrs, &(cap->rmt_args))); 434 } 435 return (FALSE); 436 } 437 438 /* 439 * XDR remote call results along with the address. Ignore 440 * program number, version number and proc number. 441 * Written for XDR_ENCODE direction only. 442 */ 443 static bool_t 444 xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap) 445 { 446 bool_t result; 447 448 #ifdef PORTMAP 449 if (cap->rmt_localvers == PMAPVERS) { 450 int h1, h2, h3, h4, p1, p2; 451 u_long port; 452 453 /* interpret the universal address for TCP/IP */ 454 if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d", 455 &h1, &h2, &h3, &h4, &p1, &p2) != 6) 456 return (FALSE); 457 port = ((p1 & 0xff) << 8) + (p2 & 0xff); 458 result = xdr_u_long(xdrs, &port); 459 } else 460 #endif 461 if ((cap->rmt_localvers == RPCBVERS) || 462 (cap->rmt_localvers == RPCBVERS4)) { 463 result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr)); 464 } else { 465 return (FALSE); 466 } 467 if (result == TRUE) 468 return (xdr_encap_parms(xdrs, &(cap->rmt_args))); 469 return (FALSE); 470 } 471 472 /* 473 * only worries about the struct encap_parms part of struct r_rmtcall_args. 474 * The arglen must already be set!! 475 */ 476 static bool_t 477 xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap) 478 { 479 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen)); 480 } 481 482 static struct rmtcallfd_list *rmthead; 483 static struct rmtcallfd_list *rmttail; 484 485 int 486 create_rmtcall_fd(struct netconfig *nconf) 487 { 488 int fd; 489 struct rmtcallfd_list *rmt; 490 SVCXPRT *xprt; 491 492 if ((fd = __rpc_nconf2fd(nconf)) == -1) { 493 if (debugging) 494 fprintf(stderr, 495 "create_rmtcall_fd: couldn't open \"%s\" (errno %d)\n", 496 nconf->nc_device, errno); 497 return (-1); 498 } 499 xprt = svc_tli_create(fd, 0, (struct t_bind *) 0, 0, 0); 500 if (xprt == NULL) { 501 if (debugging) 502 fprintf(stderr, 503 "create_rmtcall_fd: svc_tli_create failed\n"); 504 return (-1); 505 } 506 rmt = malloc(sizeof (struct rmtcallfd_list)); 507 if (rmt == NULL) { 508 syslog(LOG_ERR, "create_rmtcall_fd: no memory!"); 509 return (-1); 510 } 511 rmt->xprt = xprt; 512 rmt->netid = strdup(nconf->nc_netid); 513 xprt->xp_netid = rmt->netid; 514 rmt->fd = fd; 515 rmt->next = NULL; 516 if (rmthead == NULL) { 517 rmthead = rmt; 518 rmttail = rmt; 519 } else { 520 rmttail->next = rmt; 521 rmttail = rmt; 522 } 523 /* XXX not threadsafe */ 524 if (fd > svc_maxfd) 525 svc_maxfd = fd; 526 FD_SET(fd, &svc_fdset); 527 return (fd); 528 } 529 530 static int 531 find_rmtcallfd_by_netid(char *netid) 532 { 533 struct rmtcallfd_list *rmt; 534 535 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) { 536 if (strcmp(netid, rmt->netid) == 0) { 537 return (rmt->fd); 538 } 539 } 540 return (-1); 541 } 542 543 static SVCXPRT * 544 find_rmtcallxprt_by_fd(int fd) 545 { 546 struct rmtcallfd_list *rmt; 547 548 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) { 549 if (fd == rmt->fd) { 550 return (rmt->xprt); 551 } 552 } 553 return (NULL); 554 } 555 556 557 /* 558 * Call a remote procedure service. This procedure is very quiet when things 559 * go wrong. The proc is written to support broadcast rpc. In the broadcast 560 * case, a machine should shut-up instead of complain, lest the requestor be 561 * overrun with complaints at the expense of not hearing a valid reply. 562 * When receiving a request and verifying that the service exists, we 563 * 564 * receive the request 565 * 566 * open a new TLI endpoint on the same transport on which we received 567 * the original request 568 * 569 * remember the original request's XID (which requires knowing the format 570 * of the svc_dg_data structure) 571 * 572 * forward the request, with a new XID, to the requested service, 573 * remembering the XID used to send this request (for later use in 574 * reassociating the answer with the original request), the requestor's 575 * address, the file descriptor on which the forwarded request is 576 * made and the service's address. 577 * 578 * mark the file descriptor on which we anticipate receiving a reply from 579 * the service and one to select for in our private svc_run procedure 580 * 581 * At some time in the future, a reply will be received from the service to 582 * which we forwarded the request. At that time, we detect that the socket 583 * used was for forwarding (by looking through the finfo structures to see 584 * whether the fd corresponds to one of those) and call handle_reply() to 585 * 586 * receive the reply 587 * 588 * bundle the reply, along with the service's universal address 589 * 590 * create a SVCXPRT structure and use a version of svc_sendreply 591 * that allows us to specify the reply XID and destination, send the reply 592 * to the original requestor. 593 */ 594 595 void 596 rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp, 597 rpcproc_t reply_type, rpcvers_t versnum) 598 { 599 register rpcblist_ptr rbl; 600 struct netconfig *nconf; 601 struct netbuf *caller; 602 struct r_rmtcall_args a; 603 char *buf_alloc = NULL, *outbufp; 604 char *outbuf_alloc = NULL; 605 char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX]; 606 struct netbuf *na = (struct netbuf *) NULL; 607 struct rpc_msg call_msg; 608 int outlen; 609 u_int sendsz; 610 XDR outxdr; 611 AUTH *auth; 612 int fd = -1; 613 char *uaddr, *m_uaddr = NULL, *local_uaddr = NULL; 614 u_int32_t *xidp; 615 struct __rpc_sockinfo si; 616 struct sockaddr *localsa; 617 struct netbuf tbuf; 618 619 if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) { 620 if (reply_type == RPCBPROC_INDIRECT) 621 svcerr_systemerr(transp); 622 return; 623 } 624 if (si.si_socktype != SOCK_DGRAM) 625 return; /* Only datagram type accepted */ 626 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE); 627 if (sendsz == 0) { /* data transfer not supported */ 628 if (reply_type == RPCBPROC_INDIRECT) 629 svcerr_systemerr(transp); 630 return; 631 } 632 /* 633 * Should be multiple of 4 for XDR. 634 */ 635 sendsz = roundup(sendsz, 4); 636 if (sendsz > RPC_BUF_MAX) { 637 #ifdef notyet 638 buf_alloc = alloca(sendsz); /* not in IDR2? */ 639 #else 640 buf_alloc = malloc(sendsz); 641 #endif /* notyet */ 642 if (buf_alloc == NULL) { 643 if (debugging) 644 fprintf(stderr, 645 "rpcbproc_callit_com: No Memory!\n"); 646 if (reply_type == RPCBPROC_INDIRECT) 647 svcerr_systemerr(transp); 648 return; 649 } 650 a.rmt_args.args = buf_alloc; 651 } else { 652 a.rmt_args.args = buf; 653 } 654 655 call_msg.rm_xid = 0; /* For error checking purposes */ 656 if (!svc_getargs(transp, (xdrproc_t) xdr_rmtcall_args, (char *) &a)) { 657 if (reply_type == RPCBPROC_INDIRECT) 658 svcerr_decode(transp); 659 if (debugging) 660 fprintf(stderr, 661 "rpcbproc_callit_com: svc_getargs failed\n"); 662 goto error; 663 } 664 665 if (!check_callit(transp, &a, versnum)) { 666 svcerr_weakauth(transp); 667 goto error; 668 } 669 670 caller = svc_getrpccaller(transp); 671 #ifdef RPCBIND_DEBUG 672 if (debugging) { 673 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller); 674 fprintf(stderr, "%s %s req for (%lu, %lu, %lu, %s) from %s : ", 675 versnum == PMAPVERS ? "pmap_rmtcall" : 676 versnum == RPCBVERS ? "rpcb_rmtcall" : 677 versnum == RPCBVERS4 ? "rpcb_indirect" : "unknown", 678 reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit", 679 (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers, 680 (unsigned long)a.rmt_proc, transp->xp_netid, 681 uaddr ? uaddr : "unknown"); 682 free(uaddr); 683 } 684 #endif 685 686 rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid); 687 688 rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers, 689 a.rmt_proc, transp->xp_netid, rbl); 690 691 if (rbl == (rpcblist_ptr)NULL) { 692 #ifdef RPCBIND_DEBUG 693 if (debugging) 694 fprintf(stderr, "not found\n"); 695 #endif 696 if (reply_type == RPCBPROC_INDIRECT) 697 svcerr_noprog(transp); 698 goto error; 699 } 700 if (rbl->rpcb_map.r_vers != a.rmt_vers) { 701 if (reply_type == RPCBPROC_INDIRECT) { 702 rpcvers_t vers_low, vers_high; 703 704 find_versions(a.rmt_prog, transp->xp_netid, 705 &vers_low, &vers_high); 706 svcerr_progvers(transp, vers_low, vers_high); 707 } 708 goto error; 709 } 710 711 #ifdef RPCBIND_DEBUG 712 if (debugging) 713 fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr); 714 #endif 715 /* 716 * Check whether this entry is valid and a server is present 717 * Mergeaddr() returns NULL if no such entry is present, and 718 * returns "" if the entry was present but the server is not 719 * present (i.e., it crashed). 720 */ 721 if (reply_type == RPCBPROC_INDIRECT) { 722 uaddr = mergeaddr(transp, transp->xp_netid, 723 rbl->rpcb_map.r_addr, NULL); 724 if (uaddr == NULL || uaddr[0] == '\0') { 725 svcerr_noprog(transp); 726 free(uaddr); 727 goto error; 728 } 729 free(uaddr); 730 } 731 nconf = rpcbind_get_conf(transp->xp_netid); 732 if (nconf == (struct netconfig *)NULL) { 733 if (reply_type == RPCBPROC_INDIRECT) 734 svcerr_systemerr(transp); 735 if (debugging) 736 fprintf(stderr, 737 "rpcbproc_callit_com: rpcbind_get_conf failed\n"); 738 goto error; 739 } 740 localsa = local_sa(((struct sockaddr *)caller->buf)->sa_family); 741 if (localsa == NULL) { 742 if (debugging) 743 fprintf(stderr, 744 "rpcbproc_callit_com: no local address\n"); 745 goto error; 746 } 747 tbuf.len = tbuf.maxlen = localsa->sa_len; 748 tbuf.buf = localsa; 749 local_uaddr = 750 addrmerge(&tbuf, rbl->rpcb_map.r_addr, NULL, nconf->nc_netid); 751 m_uaddr = addrmerge(caller, rbl->rpcb_map.r_addr, NULL, 752 nconf->nc_netid); 753 #ifdef RPCBIND_DEBUG 754 if (debugging) 755 fprintf(stderr, "merged uaddr %s\n", m_uaddr); 756 #endif 757 if ((fd = find_rmtcallfd_by_netid(nconf->nc_netid)) == -1) { 758 if (reply_type == RPCBPROC_INDIRECT) 759 svcerr_systemerr(transp); 760 goto error; 761 } 762 xidp = __rpcb_get_dg_xidp(transp); 763 switch (forward_register(*xidp, caller, fd, m_uaddr, reply_type, 764 versnum, &call_msg.rm_xid)) { 765 case 1: 766 /* Success; forward_register() will free m_uaddr for us. */ 767 m_uaddr = NULL; 768 break; 769 case 0: 770 /* 771 * A duplicate request for the slow server. Let's not 772 * beat on it any more. 773 */ 774 if (debugging) 775 fprintf(stderr, 776 "rpcbproc_callit_com: duplicate request\n"); 777 goto error; 778 case -1: 779 /* forward_register failed. Perhaps no memory. */ 780 if (debugging) 781 fprintf(stderr, 782 "rpcbproc_callit_com: forward_register failed\n"); 783 goto error; 784 } 785 786 #ifdef DEBUG_RMTCALL 787 if (debugging) 788 fprintf(stderr, 789 "rpcbproc_callit_com: original XID %x, new XID %x\n", 790 *xidp, call_msg.rm_xid); 791 #endif 792 call_msg.rm_direction = CALL; 793 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 794 call_msg.rm_call.cb_prog = a.rmt_prog; 795 call_msg.rm_call.cb_vers = a.rmt_vers; 796 if (sendsz > RPC_BUF_MAX) { 797 #ifdef notyet 798 outbuf_alloc = alloca(sendsz); /* not in IDR2? */ 799 #else 800 outbuf_alloc = malloc(sendsz); 801 #endif /* notyet */ 802 if (outbuf_alloc == NULL) { 803 if (reply_type == RPCBPROC_INDIRECT) 804 svcerr_systemerr(transp); 805 if (debugging) 806 fprintf(stderr, 807 "rpcbproc_callit_com: No memory!\n"); 808 goto error; 809 } 810 xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE); 811 } else { 812 xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE); 813 } 814 if (!xdr_callhdr(&outxdr, &call_msg)) { 815 if (reply_type == RPCBPROC_INDIRECT) 816 svcerr_systemerr(transp); 817 if (debugging) 818 fprintf(stderr, 819 "rpcbproc_callit_com: xdr_callhdr failed\n"); 820 goto error; 821 } 822 if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) { 823 if (reply_type == RPCBPROC_INDIRECT) 824 svcerr_systemerr(transp); 825 if (debugging) 826 fprintf(stderr, 827 "rpcbproc_callit_com: xdr_u_long failed\n"); 828 goto error; 829 } 830 831 if (rqstp->rq_cred.oa_flavor == AUTH_NULL) { 832 auth = authnone_create(); 833 } else if (rqstp->rq_cred.oa_flavor == AUTH_SYS) { 834 struct authunix_parms *au; 835 836 au = (struct authunix_parms *)rqstp->rq_clntcred; 837 auth = authunix_create(au->aup_machname, 838 au->aup_uid, au->aup_gid, 839 au->aup_len, au->aup_gids); 840 if (auth == NULL) /* fall back */ 841 auth = authnone_create(); 842 } else { 843 /* we do not support any other authentication scheme */ 844 if (debugging) 845 fprintf(stderr, 846 "rpcbproc_callit_com: oa_flavor != AUTH_NONE and oa_flavor != AUTH_SYS\n"); 847 if (reply_type == RPCBPROC_INDIRECT) 848 svcerr_weakauth(transp); /* XXX too strong.. */ 849 goto error; 850 } 851 if (auth == NULL) { 852 if (reply_type == RPCBPROC_INDIRECT) 853 svcerr_systemerr(transp); 854 if (debugging) 855 fprintf(stderr, 856 "rpcbproc_callit_com: authwhatever_create returned NULL\n"); 857 goto error; 858 } 859 if (!AUTH_MARSHALL(auth, &outxdr)) { 860 if (reply_type == RPCBPROC_INDIRECT) 861 svcerr_systemerr(transp); 862 AUTH_DESTROY(auth); 863 if (debugging) 864 fprintf(stderr, 865 "rpcbproc_callit_com: AUTH_MARSHALL failed\n"); 866 goto error; 867 } 868 AUTH_DESTROY(auth); 869 if (!xdr_opaque_parms(&outxdr, &a)) { 870 if (reply_type == RPCBPROC_INDIRECT) 871 svcerr_systemerr(transp); 872 if (debugging) 873 fprintf(stderr, 874 "rpcbproc_callit_com: xdr_opaque_parms failed\n"); 875 goto error; 876 } 877 outlen = (int) XDR_GETPOS(&outxdr); 878 if (outbuf_alloc) 879 outbufp = outbuf_alloc; 880 else 881 outbufp = outbuf; 882 883 na = uaddr2taddr(nconf, local_uaddr); 884 if (!na) { 885 if (reply_type == RPCBPROC_INDIRECT) 886 svcerr_systemerr(transp); 887 goto error; 888 } 889 890 if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len) 891 != outlen) { 892 if (debugging) 893 fprintf(stderr, 894 "rpcbproc_callit_com: sendto failed: errno %d\n", errno); 895 if (reply_type == RPCBPROC_INDIRECT) 896 svcerr_systemerr(transp); 897 goto error; 898 } 899 goto out; 900 901 error: 902 if (call_msg.rm_xid != 0) 903 (void) free_slot_by_xid(call_msg.rm_xid); 904 out: 905 free(local_uaddr); 906 free(buf_alloc); 907 free(outbuf_alloc); 908 netbuffree(na); 909 free(m_uaddr); 910 } 911 912 /* 913 * Makes an entry into the FIFO for the given request. 914 * Returns 1 on success, 0 if this is a duplicate request, or -1 on error. 915 * *callxidp is set to the xid of the call. 916 */ 917 static int 918 forward_register(u_int32_t caller_xid, struct netbuf *caller_addr, 919 int forward_fd, char *uaddr, rpcproc_t reply_type, 920 rpcvers_t versnum, u_int32_t *callxidp) 921 { 922 int i; 923 int j = 0; 924 time_t min_time, time_now; 925 static u_int32_t lastxid; 926 int entry = -1; 927 928 min_time = FINFO[0].time; 929 time_now = time((time_t *)0); 930 /* initialization */ 931 if (lastxid == 0) 932 lastxid = time_now * NFORWARD; 933 934 /* 935 * Check if it is a duplicate entry. Then, 936 * try to find an empty slot. If not available, then 937 * use the slot with the earliest time. 938 */ 939 for (i = 0; i < NFORWARD; i++) { 940 if (FINFO[i].flag & FINFO_ACTIVE) { 941 if ((FINFO[i].caller_xid == caller_xid) && 942 (FINFO[i].reply_type == reply_type) && 943 (FINFO[i].versnum == versnum) && 944 (!netbufcmp(FINFO[i].caller_addr, 945 caller_addr))) { 946 FINFO[i].time = time((time_t *)0); 947 return (0); /* Duplicate entry */ 948 } else { 949 /* Should we wait any longer */ 950 if ((time_now - FINFO[i].time) > MAXTIME_OFF) 951 (void) free_slot_by_index(i); 952 } 953 } 954 if (entry == -1) { 955 if ((FINFO[i].flag & FINFO_ACTIVE) == 0) { 956 entry = i; 957 } else if (FINFO[i].time < min_time) { 958 j = i; 959 min_time = FINFO[i].time; 960 } 961 } 962 } 963 if (entry != -1) { 964 /* use this empty slot */ 965 j = entry; 966 } else { 967 (void) free_slot_by_index(j); 968 } 969 if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) { 970 return (-1); 971 } 972 rpcb_rmtcalls++; /* no of pending calls */ 973 FINFO[j].flag = FINFO_ACTIVE; 974 FINFO[j].reply_type = reply_type; 975 FINFO[j].versnum = versnum; 976 FINFO[j].time = time_now; 977 FINFO[j].caller_xid = caller_xid; 978 FINFO[j].forward_fd = forward_fd; 979 /* 980 * Though uaddr is not allocated here, it will still be freed 981 * from free_slot_*(). 982 */ 983 FINFO[j].uaddr = uaddr; 984 lastxid = lastxid + NFORWARD; 985 /* Don't allow a zero xid below. */ 986 if ((u_int32_t)(lastxid + NFORWARD) <= NFORWARD) 987 lastxid = NFORWARD; 988 FINFO[j].forward_xid = lastxid + j; /* encode slot */ 989 *callxidp = FINFO[j].forward_xid; /* forward on this xid */ 990 return (1); 991 } 992 993 static struct finfo * 994 forward_find(u_int32_t reply_xid) 995 { 996 int i; 997 998 i = reply_xid % (u_int32_t)NFORWARD; 999 if ((FINFO[i].flag & FINFO_ACTIVE) && 1000 (FINFO[i].forward_xid == reply_xid)) { 1001 return (&FINFO[i]); 1002 } 1003 return (NULL); 1004 } 1005 1006 static int 1007 free_slot_by_xid(u_int32_t xid) 1008 { 1009 int entry; 1010 1011 entry = xid % (u_int32_t)NFORWARD; 1012 return (free_slot_by_index(entry)); 1013 } 1014 1015 static int 1016 free_slot_by_index(int index) 1017 { 1018 struct finfo *fi; 1019 1020 fi = &FINFO[index]; 1021 if (fi->flag & FINFO_ACTIVE) { 1022 netbuffree(fi->caller_addr); 1023 /* XXX may be too big, but can't access xprt array here */ 1024 if (fi->forward_fd >= svc_maxfd) 1025 svc_maxfd--; 1026 free(fi->uaddr); 1027 fi->flag &= ~FINFO_ACTIVE; 1028 rpcb_rmtcalls--; 1029 return (1); 1030 } 1031 return (0); 1032 } 1033 1034 static int 1035 netbufcmp(struct netbuf *n1, struct netbuf *n2) 1036 { 1037 return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len)); 1038 } 1039 1040 static bool_t 1041 netbuf_copybuf(struct netbuf *dst, const struct netbuf *src) 1042 { 1043 assert(src->len <= src->maxlen); 1044 1045 if (dst->maxlen < src->len || dst->buf == NULL) { 1046 free(dst->buf); 1047 if ((dst->buf = calloc(1, src->maxlen)) == NULL) 1048 return (FALSE); 1049 dst->maxlen = src->maxlen; 1050 } 1051 1052 dst->len = src->len; 1053 memcpy(dst->buf, src->buf, src->len); 1054 1055 return (TRUE); 1056 } 1057 1058 static struct netbuf * 1059 netbufdup(struct netbuf *ap) 1060 { 1061 struct netbuf *np; 1062 1063 if ((np = calloc(1, sizeof(struct netbuf))) == NULL) 1064 return (NULL); 1065 if (netbuf_copybuf(np, ap) == FALSE) { 1066 free(np); 1067 return (NULL); 1068 } 1069 return (np); 1070 } 1071 1072 static void 1073 netbuffree(struct netbuf *ap) 1074 { 1075 1076 if (ap == NULL) 1077 return; 1078 free(ap->buf); 1079 ap->buf = NULL; 1080 free(ap); 1081 } 1082 1083 1084 #define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND) 1085 extern bool_t __svc_clean_idle(fd_set *, int, bool_t); 1086 1087 void 1088 my_svc_run(void) 1089 { 1090 size_t nfds; 1091 struct pollfd pollfds[FD_SETSIZE + 1]; 1092 int poll_ret, check_ret; 1093 int n; 1094 #ifdef SVC_RUN_DEBUG 1095 int i; 1096 #endif 1097 register struct pollfd *p; 1098 fd_set cleanfds; 1099 1100 for (;;) { 1101 p = pollfds; 1102 p->fd = terminate_rfd; 1103 p->events = MASKVAL; 1104 p++; 1105 for (n = 0; n <= svc_maxfd; n++) { 1106 if (FD_ISSET(n, &svc_fdset)) { 1107 p->fd = n; 1108 p->events = MASKVAL; 1109 p++; 1110 } 1111 } 1112 nfds = p - pollfds; 1113 poll_ret = 0; 1114 #ifdef SVC_RUN_DEBUG 1115 if (debugging) { 1116 fprintf(stderr, "polling for read on fd < "); 1117 for (i = 0, p = pollfds; i < nfds; i++, p++) 1118 if (p->events) 1119 fprintf(stderr, "%d ", p->fd); 1120 fprintf(stderr, ">\n"); 1121 } 1122 #endif 1123 poll_ret = poll(pollfds, nfds, 30 * 1000); 1124 1125 if (doterminate != 0) { 1126 close(rpcbindlockfd); 1127 #ifdef WARMSTART 1128 syslog(LOG_ERR, 1129 "rpcbind terminating on signal %d. Restart with \"rpcbind -w\"", 1130 (int)doterminate); 1131 write_warmstart(); /* Dump yourself */ 1132 #endif 1133 exit(2); 1134 } 1135 1136 switch (poll_ret) { 1137 case -1: 1138 /* 1139 * We ignore all errors, continuing with the assumption 1140 * that it was set by the signal handlers (or any 1141 * other outside event) and not caused by poll(). 1142 */ 1143 case 0: 1144 cleanfds = svc_fdset; 1145 __svc_clean_idle(&cleanfds, 30, FALSE); 1146 continue; 1147 default: 1148 #ifdef SVC_RUN_DEBUG 1149 if (debugging) { 1150 fprintf(stderr, "poll returned read fds < "); 1151 for (i = 0, p = pollfds; i < nfds; i++, p++) 1152 if (p->revents) 1153 fprintf(stderr, "%d ", p->fd); 1154 fprintf(stderr, ">\n"); 1155 } 1156 #endif 1157 /* 1158 * If we found as many replies on callback fds 1159 * as the number of descriptors selectable which 1160 * poll() returned, there can be no more so we 1161 * don't call svc_getreq_poll. Otherwise, there 1162 * must be another so we must call svc_getreq_poll. 1163 */ 1164 if ((check_ret = check_rmtcalls(pollfds, nfds)) == 1165 poll_ret) 1166 continue; 1167 svc_getreq_poll(pollfds, poll_ret-check_ret); 1168 } 1169 #ifdef SVC_RUN_DEBUG 1170 if (debugging) { 1171 fprintf(stderr, "svc_maxfd now %u\n", svc_maxfd); 1172 } 1173 #endif 1174 } 1175 } 1176 1177 static int 1178 check_rmtcalls(struct pollfd *pfds, int nfds) 1179 { 1180 int j, ncallbacks_found = 0, rmtcalls_pending; 1181 SVCXPRT *xprt; 1182 1183 if (rpcb_rmtcalls == 0) 1184 return (0); 1185 1186 rmtcalls_pending = rpcb_rmtcalls; 1187 for (j = 0; j < nfds; j++) { 1188 if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) { 1189 if (pfds[j].revents) { 1190 ncallbacks_found++; 1191 #ifdef DEBUG_RMTCALL 1192 if (debugging) 1193 fprintf(stderr, 1194 "my_svc_run: polled on forwarding fd %d, netid %s - calling handle_reply\n", 1195 pfds[j].fd, xprt->xp_netid); 1196 #endif 1197 handle_reply(pfds[j].fd, xprt); 1198 pfds[j].revents = 0; 1199 if (ncallbacks_found >= rmtcalls_pending) { 1200 break; 1201 } 1202 } 1203 } 1204 } 1205 return (ncallbacks_found); 1206 } 1207 1208 static void 1209 xprt_set_caller(SVCXPRT *xprt, struct finfo *fi) 1210 { 1211 u_int32_t *xidp; 1212 1213 netbuf_copybuf(svc_getrpccaller(xprt), fi->caller_addr); 1214 xidp = __rpcb_get_dg_xidp(xprt); 1215 *xidp = fi->caller_xid; 1216 } 1217 1218 /* 1219 * Call svcerr_systemerr() only if RPCBVERS4 1220 */ 1221 static void 1222 send_svcsyserr(SVCXPRT *xprt, struct finfo *fi) 1223 { 1224 if (fi->reply_type == RPCBPROC_INDIRECT) { 1225 xprt_set_caller(xprt, fi); 1226 svcerr_systemerr(xprt); 1227 } 1228 return; 1229 } 1230 1231 static void 1232 handle_reply(int fd, SVCXPRT *xprt) 1233 { 1234 XDR reply_xdrs; 1235 struct rpc_msg reply_msg; 1236 struct rpc_err reply_error; 1237 char *buffer; 1238 struct finfo *fi; 1239 int inlen, pos, len; 1240 struct r_rmtcall_args a; 1241 struct sockaddr_storage ss; 1242 socklen_t fromlen; 1243 #ifdef SVC_RUN_DEBUG 1244 char *uaddr; 1245 #endif 1246 1247 buffer = malloc(RPC_BUF_MAX); 1248 if (buffer == NULL) 1249 goto done; 1250 1251 do { 1252 fromlen = sizeof(ss); 1253 inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0, 1254 (struct sockaddr *)&ss, &fromlen); 1255 } while (inlen < 0 && errno == EINTR); 1256 if (inlen < 0) { 1257 if (debugging) 1258 fprintf(stderr, 1259 "handle_reply: recvfrom returned %d, errno %d\n", inlen, errno); 1260 goto done; 1261 } 1262 1263 reply_msg.acpted_rply.ar_verf = _null_auth; 1264 reply_msg.acpted_rply.ar_results.where = 0; 1265 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 1266 1267 xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE); 1268 if (!xdr_replymsg(&reply_xdrs, &reply_msg)) { 1269 if (debugging) 1270 (void) fprintf(stderr, 1271 "handle_reply: xdr_replymsg failed\n"); 1272 goto done; 1273 } 1274 fi = forward_find(reply_msg.rm_xid); 1275 #ifdef SVC_RUN_DEBUG 1276 if (debugging) { 1277 fprintf(stderr, "handle_reply: reply xid: %d fi addr: %p\n", 1278 reply_msg.rm_xid, fi); 1279 } 1280 #endif 1281 if (fi == NULL) { 1282 goto done; 1283 } 1284 _seterr_reply(&reply_msg, &reply_error); 1285 if (reply_error.re_status != RPC_SUCCESS) { 1286 if (debugging) 1287 (void) fprintf(stderr, "handle_reply: %s\n", 1288 clnt_sperrno(reply_error.re_status)); 1289 send_svcsyserr(xprt, fi); 1290 goto done; 1291 } 1292 pos = XDR_GETPOS(&reply_xdrs); 1293 len = inlen - pos; 1294 a.rmt_args.args = &buffer[pos]; 1295 a.rmt_args.arglen = len; 1296 a.rmt_uaddr = fi->uaddr; 1297 a.rmt_localvers = fi->versnum; 1298 1299 xprt_set_caller(xprt, fi); 1300 #ifdef SVC_RUN_DEBUG 1301 uaddr = taddr2uaddr(rpcbind_get_conf("udp"), 1302 svc_getrpccaller(xprt)); 1303 if (debugging) { 1304 fprintf(stderr, "handle_reply: forwarding address %s to %s\n", 1305 a.rmt_uaddr, uaddr ? uaddr : "unknown"); 1306 } 1307 free(uaddr); 1308 #endif 1309 svc_sendreply(xprt, (xdrproc_t) xdr_rmtcall_result, (char *) &a); 1310 done: 1311 free(buffer); 1312 1313 if (reply_msg.rm_xid == 0) { 1314 #ifdef SVC_RUN_DEBUG 1315 if (debugging) { 1316 fprintf(stderr, "handle_reply: NULL xid on exit!\n"); 1317 } 1318 #endif 1319 } else 1320 (void) free_slot_by_xid(reply_msg.rm_xid); 1321 return; 1322 } 1323 1324 static void 1325 find_versions(rpcprog_t prog, char *netid, rpcvers_t *lowvp, rpcvers_t *highvp) 1326 { 1327 register rpcblist_ptr rbl; 1328 unsigned int lowv = 0; 1329 unsigned int highv = 0; 1330 1331 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 1332 if ((rbl->rpcb_map.r_prog != prog) || 1333 ((rbl->rpcb_map.r_netid != NULL) && 1334 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0))) 1335 continue; 1336 if (lowv == 0) { 1337 highv = rbl->rpcb_map.r_vers; 1338 lowv = highv; 1339 } else if (rbl->rpcb_map.r_vers < lowv) { 1340 lowv = rbl->rpcb_map.r_vers; 1341 } else if (rbl->rpcb_map.r_vers > highv) { 1342 highv = rbl->rpcb_map.r_vers; 1343 } 1344 } 1345 *lowvp = lowv; 1346 *highvp = highv; 1347 return; 1348 } 1349 1350 /* 1351 * returns the item with the given program, version number and netid. 1352 * If that version number is not found, it returns the item with that 1353 * program number, so that address is now returned to the caller. The 1354 * caller when makes a call to this program, version number, the call 1355 * will fail and it will return with PROGVERS_MISMATCH. The user can 1356 * then determine the highest and the lowest version number for this 1357 * program using clnt_geterr() and use those program version numbers. 1358 * 1359 * Returns the RPCBLIST for the given prog, vers and netid 1360 */ 1361 static rpcblist_ptr 1362 find_service(rpcprog_t prog, rpcvers_t vers, char *netid) 1363 { 1364 register rpcblist_ptr hit = NULL; 1365 register rpcblist_ptr rbl; 1366 1367 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 1368 if ((rbl->rpcb_map.r_prog != prog) || 1369 ((rbl->rpcb_map.r_netid != NULL) && 1370 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0))) 1371 continue; 1372 hit = rbl; 1373 if (rbl->rpcb_map.r_vers == vers) 1374 break; 1375 } 1376 return (hit); 1377 } 1378 1379 /* 1380 * Copies the name associated with the uid of the caller and returns 1381 * a pointer to it. Similar to getwd(). 1382 */ 1383 static char * 1384 getowner(SVCXPRT *transp, char *owner, size_t ownersize) 1385 { 1386 uid_t uid; 1387 1388 if (__rpc_get_local_uid(transp, &uid) < 0) 1389 strlcpy(owner, "unknown", ownersize); 1390 else if (uid == 0) 1391 strlcpy(owner, "superuser", ownersize); 1392 else 1393 snprintf(owner, ownersize, "%d", uid); 1394 1395 return owner; 1396 } 1397 1398 #ifdef PORTMAP 1399 /* 1400 * Add this to the pmap list only if it is UDP or TCP. 1401 */ 1402 static int 1403 add_pmaplist(RPCB *arg) 1404 { 1405 struct pmap pmap; 1406 struct pmaplist *pml; 1407 int h1, h2, h3, h4, p1, p2; 1408 1409 if (strcmp(arg->r_netid, udptrans) == 0) { 1410 /* It is UDP! */ 1411 pmap.pm_prot = IPPROTO_UDP; 1412 } else if (strcmp(arg->r_netid, tcptrans) == 0) { 1413 /* It is TCP */ 1414 pmap.pm_prot = IPPROTO_TCP; 1415 } else 1416 /* Not an IP protocol */ 1417 return (0); 1418 1419 /* interpret the universal address for TCP/IP */ 1420 if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d", 1421 &h1, &h2, &h3, &h4, &p1, &p2) != 6) 1422 return (0); 1423 pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff); 1424 pmap.pm_prog = arg->r_prog; 1425 pmap.pm_vers = arg->r_vers; 1426 /* 1427 * add to END of list 1428 */ 1429 pml = malloc(sizeof (struct pmaplist)); 1430 if (pml == NULL) { 1431 (void) syslog(LOG_ERR, "rpcbind: no memory!\n"); 1432 return (1); 1433 } 1434 pml->pml_map = pmap; 1435 pml->pml_next = NULL; 1436 if (list_pml == NULL) { 1437 list_pml = pml; 1438 } else { 1439 struct pmaplist *fnd; 1440 1441 /* Attach to the end of the list */ 1442 for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next) 1443 ; 1444 fnd->pml_next = pml; 1445 } 1446 return (0); 1447 } 1448 1449 /* 1450 * Delete this from the pmap list only if it is UDP or TCP. 1451 */ 1452 static int 1453 del_pmaplist(RPCB *arg) 1454 { 1455 struct pmaplist *pml; 1456 struct pmaplist *prevpml, *fnd; 1457 unsigned long prot; 1458 1459 if (strcmp(arg->r_netid, udptrans) == 0) { 1460 /* It is UDP! */ 1461 prot = IPPROTO_UDP; 1462 } else if (strcmp(arg->r_netid, tcptrans) == 0) { 1463 /* It is TCP */ 1464 prot = IPPROTO_TCP; 1465 } else if (arg->r_netid[0] == 0) { 1466 prot = 0; /* Remove all occurrences */ 1467 } else { 1468 /* Not an IP protocol */ 1469 return (0); 1470 } 1471 for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) { 1472 if ((pml->pml_map.pm_prog != arg->r_prog) || 1473 (pml->pml_map.pm_vers != arg->r_vers) || 1474 (prot && (pml->pml_map.pm_prot != prot))) { 1475 /* both pml & prevpml move forwards */ 1476 prevpml = pml; 1477 pml = pml->pml_next; 1478 continue; 1479 } 1480 /* found it; pml moves forward, prevpml stays */ 1481 fnd = pml; 1482 pml = pml->pml_next; 1483 if (prevpml == NULL) 1484 list_pml = pml; 1485 else 1486 prevpml->pml_next = pml; 1487 free(fnd); 1488 } 1489 return (0); 1490 } 1491 #endif /* PORTMAP */ 1492