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