1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Herb Hasler and Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)mountd.c 8.15 (Berkeley) 5/1/95 34 * $FreeBSD: head/usr.sbin/mountd/mountd.c 173056 2007-10-27 12:24:47Z simon $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/module.h> 39 #include <sys/mount.h> 40 #include <sys/mountctl.h> 41 #include <sys/fcntl.h> 42 #include <sys/linker.h> 43 #include <sys/stat.h> 44 #include <sys/syslog.h> 45 #include <sys/sysctl.h> 46 47 #include <rpc/rpc.h> 48 #include <rpc/rpc_com.h> 49 #include <rpcsvc/mount.h> 50 #include <vfs/nfs/rpcv2.h> 51 #include <vfs/nfs/nfsproto.h> 52 #include <vfs/nfs/nfs.h> 53 #include <vfs/ufs/ufsmount.h> 54 #include <vfs/msdosfs/msdosfsmount.h> 55 #include <vfs/ntfs/ntfsmount.h> 56 #include <vfs/isofs/cd9660/cd9660_mount.h> /* XXX need isofs in include */ 57 58 #include <arpa/inet.h> 59 60 #include <ctype.h> 61 #include <err.h> 62 #include <errno.h> 63 #include <grp.h> 64 #include <limits.h> 65 #include <libutil.h> 66 #include <netdb.h> 67 #include <pwd.h> 68 #include <signal.h> 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <unistd.h> 73 #include "pathnames.h" 74 75 #ifdef DEBUG 76 #include <stdarg.h> 77 #endif 78 79 /* 80 * Structures for keeping the mount list and export list 81 */ 82 struct mountlist { 83 struct mountlist *ml_next; 84 char ml_host[RPCMNT_NAMELEN+1]; 85 char ml_dirp[RPCMNT_PATHLEN+1]; 86 }; 87 88 struct dirlist { 89 struct dirlist *dp_left; 90 struct dirlist *dp_right; 91 int dp_flag; 92 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 93 char dp_dirp[1]; /* Actually malloc'd to size of dir */ 94 }; 95 /* dp_flag bits */ 96 #define DP_DEFSET 0x1 97 #define DP_HOSTSET 0x2 98 99 struct exportlist { 100 struct exportlist *ex_next; 101 struct dirlist *ex_dirl; 102 struct dirlist *ex_defdir; 103 int ex_flag; 104 fsid_t ex_fs; 105 char *ex_fsdir; 106 char *ex_indexfile; 107 }; 108 /* ex_flag bits */ 109 #define EX_LINKED 0x1 110 111 struct netmsk { 112 struct sockaddr_storage nt_net; 113 struct sockaddr_storage nt_mask; 114 char *nt_name; 115 }; 116 117 union grouptypes { 118 struct addrinfo *gt_addrinfo; 119 struct netmsk gt_net; 120 }; 121 122 struct grouplist { 123 int gr_type; 124 union grouptypes gr_ptr; 125 struct grouplist *gr_next; 126 }; 127 /* Group types */ 128 #define GT_NULL 0x0 129 #define GT_HOST 0x1 130 #define GT_NET 0x2 131 #define GT_DEFAULT 0x3 132 #define GT_IGNORE 0x5 133 134 struct hostlist { 135 int ht_flag; /* Uses DP_xx bits */ 136 struct grouplist *ht_grp; 137 struct hostlist *ht_next; 138 }; 139 140 struct fhreturn { 141 int fhr_flag; 142 int fhr_vers; 143 nfsfh_t fhr_fh; 144 }; 145 146 /* Global defs */ 147 char *add_expdir(struct dirlist **, char *, int); 148 void add_dlist(struct dirlist **, struct dirlist *, 149 struct grouplist *, int); 150 void add_mlist(char *, char *); 151 int check_dirpath(char *); 152 int check_options(struct dirlist *); 153 int checkmask(struct sockaddr *sa); 154 int chk_host(struct dirlist *, struct sockaddr *, int *, int *); 155 void create_service(struct netconfig *nconf); 156 void del_mlist(char *, char *); 157 struct dirlist *dirp_search(struct dirlist *, char *); 158 int do_mount(struct exportlist *, struct grouplist *, int, 159 struct ucred *, char *, int, struct statfs *); 160 int do_opt(char **, char **, struct exportlist *, struct grouplist *, 161 int *, int *, struct ucred *); 162 struct exportlist *ex_search(fsid_t *); 163 struct exportlist *get_exp(void); 164 void free_dir(struct dirlist *); 165 void free_exp(struct exportlist *); 166 void free_grp(struct grouplist *); 167 void free_host(struct hostlist *); 168 void get_exportlist(void); 169 int get_host(char *, struct grouplist *, struct grouplist *); 170 struct hostlist *get_ht(void); 171 int get_line(void); 172 void get_mountlist(void); 173 int get_net(char *, struct netmsk *, int); 174 void getexp_err(struct exportlist *, struct grouplist *); 175 struct grouplist *get_grp(void); 176 void hang_dirp(struct dirlist *, struct grouplist *, 177 struct exportlist *, int); 178 void huphandler(int sig); 179 int makemask(struct sockaddr_storage *ssp, int bitlen); 180 void mntsrv(struct svc_req *, SVCXPRT *); 181 void nextfield(char **, char **); 182 void out_of_mem(void); 183 void parsecred(char *, struct ucred *); 184 int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int); 185 void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 186 int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 187 struct sockaddr *samask); 188 int scan_tree(struct dirlist *, struct sockaddr *); 189 static void usage(void); 190 int xdr_dir(XDR *, char *); 191 int xdr_explist(XDR *, caddr_t); 192 int xdr_explist_brief(XDR *, caddr_t); 193 int xdr_fhs(XDR *, caddr_t); 194 int xdr_mlist(XDR *, caddr_t); 195 void terminate(int); 196 197 struct exportlist *exphead; 198 struct mountlist *mlhead; 199 struct grouplist *grphead; 200 char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 201 char **exnames; 202 char **hosts = NULL; 203 struct ucred def_anon = { 204 1, 205 (uid_t) -2, 206 1, 207 { (gid_t) -2 } 208 }; 209 int force_v2 = 0; 210 int resvport_only = 1; 211 int nhosts = 0; 212 int dir_only = 1; 213 int dolog = 0; 214 int got_sighup = 0; 215 216 int xcreated = 0; 217 char *svcport_str = NULL; 218 int opt_flags; 219 static int have_v6 = 1; 220 221 struct pidfh *pfh = NULL; 222 /* Bits for the opt_flags above */ 223 #define OP_MAPROOT 0x01 224 #define OP_MAPALL 0x02 225 /* 0x4 free */ 226 #define OP_MASK 0x08 227 #define OP_NET 0x10 228 #define OP_ALLDIRS 0x40 229 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 230 #define OP_QUIET 0x100 231 #define OP_MASKLEN 0x200 232 233 #ifdef DEBUG 234 int debug = 1; 235 void SYSLOG(int, const char *, ...); 236 #define syslog SYSLOG 237 #else 238 int debug = 0; 239 #endif 240 241 /* 242 * Mountd server for NFS mount protocol as described in: 243 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 244 * The optional arguments are the exports file name 245 * default: _PATH_EXPORTS 246 * and "-n" to allow nonroot mount. 247 */ 248 int 249 main(int argc, char **argv) 250 { 251 fd_set readfds; 252 struct netconfig *nconf; 253 char *endptr, **hosts_bak; 254 void *nc_handle; 255 pid_t otherpid; 256 in_port_t svcport; 257 int c, k, s; 258 int maxrec = RPC_MAXDATASIZE; 259 260 /* Check that another mountd isn't already running. */ 261 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 262 if (pfh == NULL) { 263 if (errno == EEXIST) 264 errx(1, "mountd already running, pid: %d.", otherpid); 265 warn("cannot open or create pidfile"); 266 } 267 268 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 269 if (s < 0) 270 have_v6 = 0; 271 else 272 close(s); 273 if (modfind("nfs") < 0) { 274 /* Not present in kernel, try loading it */ 275 if (kldload("nfs") < 0 || modfind("nfs") < 0) 276 errx(1, "NFS server is not available or loadable"); 277 } 278 279 while ((c = getopt(argc, argv, "2dh:lnp:r")) != -1) { 280 switch (c) { 281 case '2': 282 force_v2 = 1; 283 break; 284 case 'n': 285 resvport_only = 0; 286 break; 287 case 'r': 288 dir_only = 0; 289 break; 290 case 'd': 291 debug = debug ? 0 : 1; 292 break; 293 case 'l': 294 dolog = 1; 295 break; 296 case 'p': 297 endptr = NULL; 298 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 299 if (endptr == NULL || *endptr != '\0' || 300 svcport == 0 || svcport >= IPPORT_MAX) 301 usage(); 302 svcport_str = strdup(optarg); 303 break; 304 case 'h': 305 ++nhosts; 306 hosts_bak = hosts; 307 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 308 if (hosts_bak == NULL) { 309 if (hosts != NULL) { 310 for (k = 0; k < nhosts; k++) 311 free(hosts[k]); 312 free(hosts); 313 out_of_mem(); 314 } 315 } 316 hosts = hosts_bak; 317 hosts[nhosts - 1] = strdup(optarg); 318 if (hosts[nhosts - 1] == NULL) { 319 for (k = 0; k < (nhosts - 1); k++) 320 free(hosts[k]); 321 free(hosts); 322 out_of_mem(); 323 } 324 break; 325 default: 326 usage(); 327 } 328 } 329 if (debug == 0) { 330 daemon(0, 0); 331 signal(SIGINT, SIG_IGN); 332 signal(SIGQUIT, SIG_IGN); 333 } 334 argc -= optind; 335 argv += optind; 336 grphead = NULL; 337 exphead = NULL; 338 mlhead = NULL; 339 if (argc > 0) 340 exnames = argv; 341 else 342 exnames = exnames_default; 343 openlog("mountd", LOG_PID, LOG_DAEMON); 344 if (debug) 345 warnx("getting export list"); 346 get_exportlist(); 347 if (debug) 348 warnx("getting mount list"); 349 get_mountlist(); 350 if (debug) 351 warnx("here we go"); 352 signal(SIGHUP, huphandler); 353 signal(SIGTERM, terminate); 354 signal(SIGPIPE, SIG_IGN); 355 356 pidfile_write(pfh); 357 358 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); 359 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); 360 361 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 362 363 if (!resvport_only) { 364 if (sysctlbyname("vfs.nfs.nfs_privport", NULL, NULL, 365 &resvport_only, sizeof(resvport_only)) != 0 && 366 errno != ENOENT) { 367 syslog(LOG_ERR, "sysctl: %m"); 368 exit(1); 369 } 370 } 371 372 /* 373 * If no hosts were specified, add a wildcard entry to bind to 374 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the 375 * list. 376 */ 377 if (nhosts == 0) { 378 hosts = malloc(sizeof(char**)); 379 if (hosts == NULL) 380 out_of_mem(); 381 hosts[0] = "*"; 382 nhosts = 1; 383 } else { 384 hosts_bak = hosts; 385 if (have_v6) { 386 hosts_bak = realloc(hosts, (nhosts + 2) * 387 sizeof(char *)); 388 if (hosts_bak == NULL) { 389 for (k = 0; k < nhosts; k++) 390 free(hosts[k]); 391 free(hosts); 392 out_of_mem(); 393 } else 394 hosts = hosts_bak; 395 nhosts += 2; 396 hosts[nhosts - 2] = "::1"; 397 } else { 398 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *)); 399 if (hosts_bak == NULL) { 400 for (k = 0; k < nhosts; k++) 401 free(hosts[k]); 402 free(hosts); 403 out_of_mem(); 404 } else { 405 nhosts += 1; 406 hosts = hosts_bak; 407 } 408 } 409 hosts[nhosts - 1] = "127.0.0.1"; 410 } 411 412 nc_handle = setnetconfig(); 413 while ((nconf = getnetconfig(nc_handle))) { 414 if (nconf->nc_flag & NC_VISIBLE) { 415 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 416 "inet6") == 0) { 417 /* DO NOTHING */ 418 } else 419 create_service(nconf); 420 } 421 } 422 endnetconfig(nc_handle); 423 424 if (xcreated == 0) { 425 syslog(LOG_ERR, "could not create any services"); 426 exit(1); 427 } 428 429 /* Expand svc_run() here so that we can call get_exportlist(). */ 430 for (;;) { 431 if (got_sighup) { 432 get_exportlist(); 433 got_sighup = 0; 434 } 435 readfds = svc_fdset; 436 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) { 437 case -1: 438 if (errno == EINTR) 439 continue; 440 syslog(LOG_ERR, "mountd died: select: %m"); 441 exit(1); 442 case 0: 443 continue; 444 default: 445 svc_getreqset(&readfds); 446 } 447 } 448 } 449 450 /* 451 * This routine creates and binds sockets on the appropriate 452 * addresses. It gets called one time for each transport and 453 * registrates the service with rpcbind on that trasport. 454 */ 455 void 456 create_service(struct netconfig *nconf) 457 { 458 struct addrinfo hints, *res = NULL; 459 struct sockaddr_in *sin; 460 struct sockaddr_in6 *sin6; 461 struct __rpc_sockinfo si; 462 struct netbuf servaddr; 463 SVCXPRT *transp = NULL; 464 int aicode; 465 int fd; 466 int nhostsbak; 467 int one = 1; 468 int r; 469 int registered = 0; 470 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 471 472 if ((nconf->nc_semantics != NC_TPI_CLTS) && 473 (nconf->nc_semantics != NC_TPI_COTS) && 474 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 475 return; /* not my type */ 476 477 /* 478 * XXX - using RPC library internal functions. 479 */ 480 if (!__rpc_nconf2sockinfo(nconf, &si)) { 481 syslog(LOG_ERR, "cannot get information for %s", 482 nconf->nc_netid); 483 return; 484 } 485 486 /* Get mountd's address on this transport */ 487 memset(&hints, 0, sizeof hints); 488 hints.ai_flags = AI_PASSIVE; 489 hints.ai_family = si.si_af; 490 hints.ai_socktype = si.si_socktype; 491 hints.ai_protocol = si.si_proto; 492 493 /* 494 * Bind to specific IPs if asked to 495 */ 496 nhostsbak = nhosts; 497 while (nhostsbak > 0) { 498 --nhostsbak; 499 /* 500 * XXX - using RPC library internal functions. 501 */ 502 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 503 int non_fatal = 0; 504 if (errno == EPROTONOSUPPORT && 505 nconf->nc_semantics != NC_TPI_CLTS) 506 non_fatal = 1; 507 508 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 509 "cannot create socket for %s", nconf->nc_netid); 510 return; 511 } 512 513 switch (hints.ai_family) { 514 case AF_INET: 515 if (inet_pton(AF_INET, hosts[nhostsbak], 516 host_addr) == 1) { 517 hints.ai_flags &= AI_NUMERICHOST; 518 } else { 519 /* 520 * Skip if we have an AF_INET6 address. 521 */ 522 if (inet_pton(AF_INET6, hosts[nhostsbak], 523 host_addr) == 1) { 524 close(fd); 525 continue; 526 } 527 } 528 break; 529 case AF_INET6: 530 if (inet_pton(AF_INET6, hosts[nhostsbak], 531 host_addr) == 1) { 532 hints.ai_flags &= AI_NUMERICHOST; 533 } else { 534 /* 535 * Skip if we have an AF_INET address. 536 */ 537 if (inet_pton(AF_INET, hosts[nhostsbak], 538 host_addr) == 1) { 539 close(fd); 540 continue; 541 } 542 } 543 544 /* 545 * We're doing host-based access checks here, so don't 546 * allow v4-in-v6 to confuse things. The kernel will 547 * disable it by default on NFS sockets too. 548 */ 549 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 550 sizeof one) < 0) { 551 syslog(LOG_ERR, 552 "can't disable v4-in-v6 on IPv6 socket"); 553 exit(1); 554 } 555 break; 556 default: 557 break; 558 } 559 560 /* 561 * If no hosts were specified, just bind to INADDR_ANY 562 */ 563 if (strcmp("*", hosts[nhostsbak]) == 0) { 564 if (svcport_str == NULL) { 565 res = malloc(sizeof(struct addrinfo)); 566 if (res == NULL) 567 out_of_mem(); 568 res->ai_flags = hints.ai_flags; 569 res->ai_family = hints.ai_family; 570 res->ai_protocol = hints.ai_protocol; 571 switch (res->ai_family) { 572 case AF_INET: 573 sin = malloc(sizeof(struct sockaddr_in)); 574 if (sin == NULL) 575 out_of_mem(); 576 sin->sin_family = AF_INET; 577 sin->sin_port = htons(0); 578 sin->sin_addr.s_addr = htonl(INADDR_ANY); 579 res->ai_addr = (struct sockaddr*) sin; 580 res->ai_addrlen = (socklen_t) 581 sizeof(res->ai_addr); 582 break; 583 case AF_INET6: 584 sin6 = malloc(sizeof(struct sockaddr_in6)); 585 if (sin6 == NULL) 586 out_of_mem(); 587 sin6->sin6_family = AF_INET6; 588 sin6->sin6_port = htons(0); 589 sin6->sin6_addr = in6addr_any; 590 res->ai_addr = (struct sockaddr*) sin6; 591 res->ai_addrlen = (socklen_t) 592 sizeof(res->ai_addr); 593 break; 594 default: 595 break; 596 } 597 } else { 598 if ((aicode = getaddrinfo(NULL, svcport_str, 599 &hints, &res)) != 0) { 600 syslog(LOG_ERR, 601 "cannot get local address for %s: %s", 602 nconf->nc_netid, 603 gai_strerror(aicode)); 604 continue; 605 } 606 } 607 } else { 608 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 609 &hints, &res)) != 0) { 610 syslog(LOG_ERR, 611 "cannot get local address for %s: %s", 612 nconf->nc_netid, gai_strerror(aicode)); 613 continue; 614 } 615 } 616 617 r = bindresvport_sa(fd, res->ai_addr); 618 if (r != 0) { 619 syslog(LOG_ERR, "bindresvport_sa: %m"); 620 exit(1); 621 } 622 623 if (nconf->nc_semantics != NC_TPI_CLTS) 624 listen(fd, SOMAXCONN); 625 626 if (nconf->nc_semantics == NC_TPI_CLTS ) 627 transp = svc_dg_create(fd, 0, 0); 628 else 629 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 630 RPC_MAXDATASIZE); 631 632 if (transp != (SVCXPRT *) NULL) { 633 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv, 634 NULL)) 635 syslog(LOG_ERR, 636 "can't register %s RPCMNT_VER1 service", 637 nconf->nc_netid); 638 if (!force_v2) { 639 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER3, 640 mntsrv, NULL)) 641 syslog(LOG_ERR, 642 "can't register %s RPCMNT_VER3 service", 643 nconf->nc_netid); 644 } 645 } else 646 syslog(LOG_WARNING, "can't create %s services", 647 nconf->nc_netid); 648 649 if (registered == 0) { 650 registered = 1; 651 memset(&hints, 0, sizeof hints); 652 hints.ai_flags = AI_PASSIVE; 653 hints.ai_family = si.si_af; 654 hints.ai_socktype = si.si_socktype; 655 hints.ai_protocol = si.si_proto; 656 657 if (svcport_str == NULL) { 658 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 659 if (svcport_str == NULL) 660 out_of_mem(); 661 662 if (getnameinfo(res->ai_addr, 663 res->ai_addr->sa_len, NULL, NI_MAXHOST, 664 svcport_str, NI_MAXSERV * sizeof(char), 665 NI_NUMERICHOST | NI_NUMERICSERV)) 666 errx(1, "Cannot get port number"); 667 } 668 669 if((aicode = getaddrinfo(NULL, svcport_str, &hints, 670 &res)) != 0) { 671 syslog(LOG_ERR, "cannot get local address: %s", 672 gai_strerror(aicode)); 673 exit(1); 674 } 675 676 servaddr.buf = malloc(res->ai_addrlen); 677 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 678 servaddr.len = res->ai_addrlen; 679 680 rpcb_set(RPCPROG_MNT, RPCMNT_VER1, nconf, &servaddr); 681 rpcb_set(RPCPROG_MNT, RPCMNT_VER3, nconf, &servaddr); 682 683 xcreated++; 684 freeaddrinfo(res); 685 } 686 } /* end while */ 687 } 688 689 static void 690 usage(void) 691 { 692 fprintf(stderr, 693 "usage: mountd [-2] [-d] [-l] [-n] [-p <port>] [-r] " 694 "[-h <bindip>] [export_file ...]\n"); 695 exit(1); 696 } 697 698 /* 699 * The mount rpc service 700 */ 701 void 702 mntsrv(struct svc_req *rqstp, SVCXPRT *transp) 703 { 704 struct exportlist *ep; 705 struct dirlist *dp; 706 struct fhreturn fhr; 707 struct stat stb; 708 struct statfs fsb; 709 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 710 int lookup_failed = 1; 711 struct sockaddr *saddr; 712 u_short sport; 713 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN]; 714 int bad = 0, defset, hostset; 715 sigset_t sighup_mask; 716 717 sigemptyset(&sighup_mask); 718 sigaddset(&sighup_mask, SIGHUP); 719 saddr = svc_getrpccaller(transp)->buf; 720 switch (saddr->sa_family) { 721 case AF_INET6: 722 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 723 break; 724 case AF_INET: 725 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 726 break; 727 default: 728 syslog(LOG_ERR, "request from unknown address family"); 729 return; 730 } 731 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host, 732 NULL, 0, 0); 733 getnameinfo(saddr, saddr->sa_len, numerichost, 734 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 735 switch (rqstp->rq_proc) { 736 case NULLPROC: 737 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 738 syslog(LOG_ERR, "can't send reply"); 739 return; 740 case RPCMNT_MOUNT: 741 if (sport >= IPPORT_RESERVED && resvport_only) { 742 syslog(LOG_NOTICE, 743 "mount request from %s from unprivileged port", 744 numerichost); 745 svcerr_weakauth(transp); 746 return; 747 } 748 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 749 syslog(LOG_NOTICE, "undecodable mount request from %s", 750 numerichost); 751 svcerr_decode(transp); 752 return; 753 } 754 755 /* 756 * Get the real pathname and make sure it is a directory 757 * or a regular file if the -r option was specified 758 * and it exists. 759 */ 760 if (realpath(rpcpath, dirpath) == NULL || 761 stat(dirpath, &stb) < 0 || 762 (!S_ISDIR(stb.st_mode) && 763 (dir_only || !S_ISREG(stb.st_mode))) || 764 statfs(dirpath, &fsb) < 0) { 765 chdir("/"); /* Just in case realpath doesn't */ 766 syslog(LOG_NOTICE, 767 "mount request from %s for non existent path %s", 768 numerichost, dirpath); 769 if (debug) 770 warnx("stat failed on %s", dirpath); 771 bad = ENOENT; /* We will send error reply later */ 772 } 773 774 /* Check in the exports list */ 775 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 776 ep = ex_search(&fsb.f_fsid); 777 hostset = defset = 0; 778 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) || 779 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 780 chk_host(dp, saddr, &defset, &hostset)) || 781 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 782 scan_tree(ep->ex_dirl, saddr) == 0))) { 783 if (bad) { 784 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 785 &bad)) 786 syslog(LOG_ERR, "can't send reply"); 787 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 788 return; 789 } 790 if (hostset & DP_HOSTSET) 791 fhr.fhr_flag = hostset; 792 else 793 fhr.fhr_flag = defset; 794 fhr.fhr_vers = rqstp->rq_vers; 795 /* Get the file handle */ 796 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 797 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 798 bad = errno; 799 syslog(LOG_ERR, "can't get fh for %s", dirpath); 800 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 801 &bad)) 802 syslog(LOG_ERR, "can't send reply"); 803 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 804 return; 805 } 806 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, &fhr)) 807 syslog(LOG_ERR, "can't send reply"); 808 if (!lookup_failed) 809 add_mlist(host, dirpath); 810 else 811 add_mlist(numerichost, dirpath); 812 if (debug) 813 warnx("mount successful"); 814 if (dolog) 815 syslog(LOG_NOTICE, 816 "mount request succeeded from %s for %s", 817 numerichost, dirpath); 818 } else { 819 bad = EACCES; 820 syslog(LOG_NOTICE, 821 "mount request denied from %s for %s", 822 numerichost, dirpath); 823 } 824 825 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, &bad)) 826 syslog(LOG_ERR, "can't send reply"); 827 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 828 return; 829 case RPCMNT_DUMP: 830 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, NULL)) 831 syslog(LOG_ERR, "can't send reply"); 832 else if (dolog) 833 syslog(LOG_NOTICE, 834 "dump request succeeded from %s", 835 numerichost); 836 return; 837 case RPCMNT_UMOUNT: 838 if (sport >= IPPORT_RESERVED && resvport_only) { 839 syslog(LOG_NOTICE, 840 "umount request from %s from unprivileged port", 841 numerichost); 842 svcerr_weakauth(transp); 843 return; 844 } 845 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 846 syslog(LOG_NOTICE, "undecodable umount request from %s", 847 numerichost); 848 svcerr_decode(transp); 849 return; 850 } 851 if (realpath(rpcpath, dirpath) == NULL) { 852 syslog(LOG_NOTICE, "umount request from %s " 853 "for non existent path %s", 854 numerichost, dirpath); 855 } 856 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 857 syslog(LOG_ERR, "can't send reply"); 858 if (!lookup_failed) 859 del_mlist(host, dirpath); 860 del_mlist(numerichost, dirpath); 861 if (dolog) 862 syslog(LOG_NOTICE, 863 "umount request succeeded from %s for %s", 864 numerichost, dirpath); 865 return; 866 case RPCMNT_UMNTALL: 867 if (sport >= IPPORT_RESERVED && resvport_only) { 868 syslog(LOG_NOTICE, 869 "umountall request from %s from unprivileged port", 870 numerichost); 871 svcerr_weakauth(transp); 872 return; 873 } 874 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 875 syslog(LOG_ERR, "can't send reply"); 876 if (!lookup_failed) 877 del_mlist(host, NULL); 878 del_mlist(numerichost, NULL); 879 if (dolog) 880 syslog(LOG_NOTICE, 881 "umountall request succeeded from %s", 882 numerichost); 883 return; 884 case RPCMNT_EXPORT: 885 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, NULL)) 886 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, NULL)) 887 syslog(LOG_ERR, "can't send reply"); 888 if (dolog) 889 syslog(LOG_NOTICE, 890 "export request succeeded from %s", 891 numerichost); 892 return; 893 default: 894 svcerr_noproc(transp); 895 return; 896 } 897 } 898 899 /* 900 * Xdr conversion for a dirpath string 901 */ 902 int 903 xdr_dir(XDR *xdrsp, char *dirp) 904 { 905 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 906 } 907 908 /* 909 * Xdr routine to generate file handle reply 910 */ 911 int 912 xdr_fhs(XDR *xdrsp, caddr_t cp) 913 { 914 struct fhreturn *fhrp = (struct fhreturn *)cp; 915 u_long ok = 0, len, auth; 916 917 if (!xdr_long(xdrsp, &ok)) 918 return (0); 919 switch (fhrp->fhr_vers) { 920 case 1: 921 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 922 case 3: 923 len = NFSX_V3FH; 924 if (!xdr_long(xdrsp, &len)) 925 return (0); 926 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 927 return (0); 928 auth = RPCAUTH_UNIX; 929 len = 1; 930 if (!xdr_long(xdrsp, &len)) 931 return (0); 932 return (xdr_long(xdrsp, &auth)); 933 } 934 return (0); 935 } 936 937 int 938 xdr_mlist(XDR *xdrsp, caddr_t cp) 939 { 940 struct mountlist *mlp; 941 int true = 1; 942 int false = 0; 943 char *strp; 944 945 mlp = mlhead; 946 while (mlp) { 947 if (!xdr_bool(xdrsp, &true)) 948 return (0); 949 strp = &mlp->ml_host[0]; 950 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 951 return (0); 952 strp = &mlp->ml_dirp[0]; 953 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 954 return (0); 955 mlp = mlp->ml_next; 956 } 957 if (!xdr_bool(xdrsp, &false)) 958 return (0); 959 return (1); 960 } 961 962 /* 963 * Xdr conversion for export list 964 */ 965 int 966 xdr_explist_common(XDR *xdrsp, caddr_t cp, int brief) 967 { 968 struct exportlist *ep; 969 int false = 0; 970 int putdef; 971 sigset_t sighup_mask; 972 973 sigemptyset(&sighup_mask); 974 sigaddset(&sighup_mask, SIGHUP); 975 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 976 ep = exphead; 977 while (ep) { 978 putdef = 0; 979 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 980 &putdef, brief)) 981 goto errout; 982 if (ep->ex_defdir && putdef == 0 && 983 put_exlist(ep->ex_defdir, xdrsp, NULL, 984 &putdef, brief)) 985 goto errout; 986 ep = ep->ex_next; 987 } 988 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 989 if (!xdr_bool(xdrsp, &false)) 990 return (0); 991 return (1); 992 errout: 993 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 994 return (0); 995 } 996 997 /* 998 * Called from xdr_explist() to traverse the tree and export the 999 * directory paths. 1000 */ 1001 int 1002 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, int brief) 1003 { 1004 struct grouplist *grp; 1005 struct hostlist *hp; 1006 int true = 1; 1007 int false = 0; 1008 int gotalldir = 0; 1009 char *strp; 1010 1011 if (dp) { 1012 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1013 return (1); 1014 if (!xdr_bool(xdrsp, &true)) 1015 return (1); 1016 strp = dp->dp_dirp; 1017 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 1018 return (1); 1019 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1020 gotalldir = 1; 1021 *putdefp = 1; 1022 } 1023 if (brief) { 1024 if (!xdr_bool(xdrsp, &true)) 1025 return (1); 1026 strp = "(...)"; 1027 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 1028 return (1); 1029 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1030 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1031 hp = dp->dp_hosts; 1032 while (hp) { 1033 grp = hp->ht_grp; 1034 if (grp->gr_type == GT_HOST) { 1035 if (!xdr_bool(xdrsp, &true)) 1036 return (1); 1037 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1038 if (!xdr_string(xdrsp, &strp, 1039 RPCMNT_NAMELEN)) 1040 return (1); 1041 } else if (grp->gr_type == GT_NET) { 1042 if (!xdr_bool(xdrsp, &true)) 1043 return (1); 1044 strp = grp->gr_ptr.gt_net.nt_name; 1045 if (!xdr_string(xdrsp, &strp, 1046 RPCMNT_NAMELEN)) 1047 return (1); 1048 } 1049 hp = hp->ht_next; 1050 if (gotalldir && hp == NULL) { 1051 hp = adp->dp_hosts; 1052 gotalldir = 0; 1053 } 1054 } 1055 } 1056 if (!xdr_bool(xdrsp, &false)) 1057 return (1); 1058 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1059 return (1); 1060 } 1061 return (0); 1062 } 1063 1064 int 1065 xdr_explist(xdrsp, cp) 1066 XDR *xdrsp; 1067 caddr_t cp; 1068 { 1069 1070 return xdr_explist_common(xdrsp, cp, 0); 1071 } 1072 1073 int 1074 xdr_explist_brief(xdrsp, cp) 1075 XDR *xdrsp; 1076 caddr_t cp; 1077 { 1078 1079 return xdr_explist_common(xdrsp, cp, 1); 1080 } 1081 1082 char *line; 1083 int linesize; 1084 FILE *exp_file; 1085 1086 /* 1087 * Get the export list from one, currently open file 1088 */ 1089 static void 1090 get_exportlist_one(void) 1091 { 1092 struct exportlist *ep, *ep2; 1093 struct grouplist *grp, *tgrp; 1094 struct exportlist **epp; 1095 struct dirlist *dirhead; 1096 struct statfs fsb; 1097 struct ucred anon; 1098 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1099 int len, has_host, exflags, got_nondir, dirplen, netgrp; 1100 1101 dirhead = NULL; 1102 while (get_line()) { 1103 if (debug) 1104 warnx("got line %s", line); 1105 cp = line; 1106 nextfield(&cp, &endcp); 1107 if (*cp == '#') 1108 goto nextline; 1109 1110 /* 1111 * Set defaults. 1112 */ 1113 has_host = FALSE; 1114 anon = def_anon; 1115 exflags = MNT_EXPORTED; 1116 got_nondir = 0; 1117 opt_flags = 0; 1118 ep = NULL; 1119 1120 /* 1121 * Create new exports list entry 1122 */ 1123 len = endcp-cp; 1124 tgrp = grp = get_grp(); 1125 while (len > 0) { 1126 if (len > RPCMNT_NAMELEN) { 1127 getexp_err(ep, tgrp); 1128 goto nextline; 1129 } 1130 if (*cp == '-') { 1131 if (ep == NULL) { 1132 getexp_err(ep, tgrp); 1133 goto nextline; 1134 } 1135 if (debug) 1136 warnx("doing opt %s", cp); 1137 got_nondir = 1; 1138 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1139 &exflags, &anon)) { 1140 getexp_err(ep, tgrp); 1141 goto nextline; 1142 } 1143 } else if (*cp == '/') { 1144 savedc = *endcp; 1145 *endcp = '\0'; 1146 if (check_dirpath(cp) && 1147 statfs(cp, &fsb) >= 0) { 1148 if (got_nondir) { 1149 syslog(LOG_ERR, "dirs must be first"); 1150 getexp_err(ep, tgrp); 1151 goto nextline; 1152 } 1153 if (ep) { 1154 if (ep->ex_fs.val[0] != fsb.f_fsid.val[0] || 1155 ep->ex_fs.val[1] != fsb.f_fsid.val[1]) { 1156 getexp_err(ep, tgrp); 1157 goto nextline; 1158 } 1159 } else { 1160 /* 1161 * See if this directory is already 1162 * in the list. 1163 */ 1164 ep = ex_search(&fsb.f_fsid); 1165 if (ep == NULL) { 1166 ep = get_exp(); 1167 ep->ex_fs = fsb.f_fsid; 1168 ep->ex_fsdir = (char *) 1169 malloc(strlen(fsb.f_mntonname) + 1); 1170 if (ep->ex_fsdir) 1171 strcpy(ep->ex_fsdir, 1172 fsb.f_mntonname); 1173 else 1174 out_of_mem(); 1175 if (debug) 1176 warnx("making new ep fs=0x%x,0x%x", 1177 fsb.f_fsid.val[0], 1178 fsb.f_fsid.val[1]); 1179 } else if (debug) 1180 warnx("found ep fs=0x%x,0x%x", 1181 fsb.f_fsid.val[0], 1182 fsb.f_fsid.val[1]); 1183 } 1184 1185 /* 1186 * Add dirpath to export mount point. 1187 */ 1188 dirp = add_expdir(&dirhead, cp, len); 1189 dirplen = len; 1190 } else { 1191 getexp_err(ep, tgrp); 1192 goto nextline; 1193 } 1194 *endcp = savedc; 1195 } else { 1196 savedc = *endcp; 1197 *endcp = '\0'; 1198 got_nondir = 1; 1199 if (ep == NULL) { 1200 getexp_err(ep, tgrp); 1201 goto nextline; 1202 } 1203 1204 /* 1205 * Get the host or netgroup. 1206 */ 1207 setnetgrent(cp); 1208 netgrp = getnetgrent(&hst, &usr, &dom); 1209 do { 1210 if (has_host) { 1211 grp->gr_next = get_grp(); 1212 grp = grp->gr_next; 1213 } 1214 if (netgrp) { 1215 if (hst == NULL) { 1216 syslog(LOG_ERR, 1217 "null hostname in netgroup %s, skipping", cp); 1218 grp->gr_type = GT_IGNORE; 1219 } else if (get_host(hst, grp, tgrp)) { 1220 syslog(LOG_ERR, 1221 "bad host %s in netgroup %s, skipping", hst, cp); 1222 grp->gr_type = GT_IGNORE; 1223 } 1224 } else if (get_host(cp, grp, tgrp)) { 1225 syslog(LOG_ERR, "bad host %s, skipping", cp); 1226 grp->gr_type = GT_IGNORE; 1227 } 1228 has_host = TRUE; 1229 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1230 endnetgrent(); 1231 *endcp = savedc; 1232 } 1233 cp = endcp; 1234 nextfield(&cp, &endcp); 1235 len = endcp - cp; 1236 } 1237 if (check_options(dirhead)) { 1238 getexp_err(ep, tgrp); 1239 goto nextline; 1240 } 1241 if (!has_host) { 1242 grp->gr_type = GT_DEFAULT; 1243 if (debug) 1244 warnx("adding a default entry"); 1245 1246 /* 1247 * Don't allow a network export coincide with a list of 1248 * host(s) on the same line. 1249 */ 1250 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1251 syslog(LOG_ERR, "network/host conflict"); 1252 getexp_err(ep, tgrp); 1253 goto nextline; 1254 1255 /* 1256 * If an export list was specified on this line, make sure 1257 * that we have at least one valid entry, otherwise skip it. 1258 */ 1259 } else { 1260 grp = tgrp; 1261 while (grp && grp->gr_type == GT_IGNORE) 1262 grp = grp->gr_next; 1263 if (! grp) { 1264 getexp_err(ep, tgrp); 1265 goto nextline; 1266 } 1267 } 1268 1269 /* 1270 * Loop through hosts, pushing the exports into the kernel. 1271 * After loop, tgrp points to the start of the list and 1272 * grp points to the last entry in the list. 1273 */ 1274 grp = tgrp; 1275 do { 1276 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen, 1277 &fsb)) { 1278 getexp_err(ep, tgrp); 1279 goto nextline; 1280 } 1281 } while (grp->gr_next && (grp = grp->gr_next)); 1282 1283 /* 1284 * Success. Update the data structures. 1285 */ 1286 if (has_host) { 1287 hang_dirp(dirhead, tgrp, ep, opt_flags); 1288 grp->gr_next = grphead; 1289 grphead = tgrp; 1290 } else { 1291 hang_dirp(dirhead, NULL, ep, 1292 opt_flags); 1293 free_grp(grp); 1294 } 1295 dirhead = NULL; 1296 if ((ep->ex_flag & EX_LINKED) == 0) { 1297 ep2 = exphead; 1298 epp = &exphead; 1299 1300 /* 1301 * Insert in the list in alphabetical order. 1302 */ 1303 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1304 epp = &ep2->ex_next; 1305 ep2 = ep2->ex_next; 1306 } 1307 if (ep2) 1308 ep->ex_next = ep2; 1309 *epp = ep; 1310 ep->ex_flag |= EX_LINKED; 1311 } 1312 nextline: 1313 if (dirhead) { 1314 free_dir(dirhead); 1315 dirhead = NULL; 1316 } 1317 } 1318 fclose(exp_file); 1319 } 1320 1321 /* 1322 * Get the export list from all specified files 1323 */ 1324 void 1325 get_exportlist(void) 1326 { 1327 struct exportlist *ep, *ep2; 1328 struct grouplist *grp, *tgrp; 1329 struct statfs *fsp, *mntbufp; 1330 struct vfsconf vfc; 1331 char *dirp; 1332 int dirplen, num, i; 1333 int done; 1334 1335 dirp = NULL; 1336 dirplen = 0; 1337 1338 /* 1339 * First, get rid of the old list 1340 */ 1341 ep = exphead; 1342 while (ep) { 1343 ep2 = ep; 1344 ep = ep->ex_next; 1345 free_exp(ep2); 1346 } 1347 exphead = NULL; 1348 1349 grp = grphead; 1350 while (grp) { 1351 tgrp = grp; 1352 grp = grp->gr_next; 1353 free_grp(tgrp); 1354 } 1355 grphead = NULL; 1356 1357 /* 1358 * And delete exports that are in the kernel for all local 1359 * filesystems. 1360 * XXX: Should know how to handle all local exportable filesystems. 1361 */ 1362 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1363 for (i = 0; i < num; i++) { 1364 union { 1365 struct ufs_args ua; 1366 struct iso_args ia; 1367 struct mfs_args ma; 1368 struct msdosfs_args da; 1369 struct ntfs_args na; 1370 } targs; 1371 struct export_args export; 1372 1373 fsp = &mntbufp[i]; 1374 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 1375 syslog(LOG_ERR, "getvfsbyname() failed for %s", 1376 fsp->f_fstypename); 1377 continue; 1378 } 1379 1380 /* 1381 * Do not delete export for network filesystem by 1382 * passing "export" arg to mount(). 1383 * It only makes sense to do this for local filesystems. 1384 */ 1385 if (vfc.vfc_flags & VFCF_NETWORK) 1386 continue; 1387 1388 export.ex_flags = MNT_DELEXPORT; 1389 if (mountctl(fsp->f_mntonname, MOUNTCTL_SET_EXPORT, -1, 1390 &export, sizeof(export), NULL, 0) == 0) { 1391 } else if (!strcmp(fsp->f_fstypename, "mfs") || 1392 !strcmp(fsp->f_fstypename, "ufs") || 1393 !strcmp(fsp->f_fstypename, "msdos") || 1394 !strcmp(fsp->f_fstypename, "ntfs") || 1395 !strcmp(fsp->f_fstypename, "cd9660")) { 1396 bzero(&targs, sizeof targs); 1397 targs.ua.fspec = NULL; 1398 targs.ua.export.ex_flags = MNT_DELEXPORT; 1399 if (mount(fsp->f_fstypename, fsp->f_mntonname, 1400 fsp->f_flags | MNT_UPDATE, 1401 (caddr_t)&targs) < 0) 1402 syslog(LOG_ERR, "can't delete exports for %s", 1403 fsp->f_mntonname); 1404 } 1405 } 1406 1407 /* 1408 * Read in the exports file and build the list, calling 1409 * nmount() as we go along to push the export rules into the kernel. 1410 */ 1411 done = 0; 1412 for (i = 0; exnames[i] != NULL; i++) { 1413 if (debug) 1414 warnx("reading exports from %s", exnames[i]); 1415 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1416 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1417 continue; 1418 } 1419 get_exportlist_one(); 1420 fclose(exp_file); 1421 done++; 1422 } 1423 if (done == 0) { 1424 syslog(LOG_ERR, "can't open any exports file"); 1425 exit(2); 1426 } 1427 } 1428 1429 /* 1430 * Allocate an export list element 1431 */ 1432 struct exportlist * 1433 get_exp(void) 1434 { 1435 struct exportlist *ep; 1436 1437 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1438 if (ep == NULL) 1439 out_of_mem(); 1440 memset(ep, 0, sizeof(struct exportlist)); 1441 return (ep); 1442 } 1443 1444 /* 1445 * Allocate a group list element 1446 */ 1447 struct grouplist * 1448 get_grp(void) 1449 { 1450 struct grouplist *gp; 1451 1452 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1453 if (gp == NULL) 1454 out_of_mem(); 1455 memset(gp, 0, sizeof(struct grouplist)); 1456 return (gp); 1457 } 1458 1459 /* 1460 * Clean up upon an error in get_exportlist(). 1461 */ 1462 void 1463 getexp_err(struct exportlist *ep, struct grouplist *grp) 1464 { 1465 struct grouplist *tgrp; 1466 1467 if (!(opt_flags & OP_QUIET)) 1468 syslog(LOG_ERR, "bad exports list line %s", line); 1469 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1470 free_exp(ep); 1471 while (grp) { 1472 tgrp = grp; 1473 grp = grp->gr_next; 1474 free_grp(tgrp); 1475 } 1476 } 1477 1478 /* 1479 * Search the export list for a matching fs. 1480 */ 1481 struct exportlist * 1482 ex_search(fsid_t *fsid) 1483 { 1484 struct exportlist *ep; 1485 1486 ep = exphead; 1487 while (ep) { 1488 if (ep->ex_fs.val[0] == fsid->val[0] && 1489 ep->ex_fs.val[1] == fsid->val[1]) 1490 return (ep); 1491 ep = ep->ex_next; 1492 } 1493 return (ep); 1494 } 1495 1496 /* 1497 * Add a directory path to the list. 1498 */ 1499 char * 1500 add_expdir(struct dirlist **dpp, char *cp, int len) 1501 { 1502 struct dirlist *dp; 1503 1504 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1505 if (dp == NULL) 1506 out_of_mem(); 1507 dp->dp_left = *dpp; 1508 dp->dp_right = NULL; 1509 dp->dp_flag = 0; 1510 dp->dp_hosts = NULL; 1511 strcpy(dp->dp_dirp, cp); 1512 *dpp = dp; 1513 return (dp->dp_dirp); 1514 } 1515 1516 /* 1517 * Hang the dir list element off the dirpath binary tree as required 1518 * and update the entry for host. 1519 */ 1520 void 1521 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 1522 int flags) 1523 { 1524 struct hostlist *hp; 1525 struct dirlist *dp2; 1526 1527 if (flags & OP_ALLDIRS) { 1528 if (ep->ex_defdir) 1529 free((caddr_t)dp); 1530 else 1531 ep->ex_defdir = dp; 1532 if (grp == NULL) { 1533 ep->ex_defdir->dp_flag |= DP_DEFSET; 1534 } else while (grp) { 1535 hp = get_ht(); 1536 hp->ht_grp = grp; 1537 hp->ht_next = ep->ex_defdir->dp_hosts; 1538 ep->ex_defdir->dp_hosts = hp; 1539 grp = grp->gr_next; 1540 } 1541 } else { 1542 1543 /* 1544 * Loop through the directories adding them to the tree. 1545 */ 1546 while (dp) { 1547 dp2 = dp->dp_left; 1548 add_dlist(&ep->ex_dirl, dp, grp, flags); 1549 dp = dp2; 1550 } 1551 } 1552 } 1553 1554 /* 1555 * Traverse the binary tree either updating a node that is already there 1556 * for the new directory or adding the new node. 1557 */ 1558 void 1559 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 1560 int flags) 1561 { 1562 struct dirlist *dp; 1563 struct hostlist *hp; 1564 int cmp; 1565 1566 dp = *dpp; 1567 if (dp) { 1568 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1569 if (cmp > 0) { 1570 add_dlist(&dp->dp_left, newdp, grp, flags); 1571 return; 1572 } else if (cmp < 0) { 1573 add_dlist(&dp->dp_right, newdp, grp, flags); 1574 return; 1575 } else 1576 free((caddr_t)newdp); 1577 } else { 1578 dp = newdp; 1579 dp->dp_left = NULL; 1580 *dpp = dp; 1581 } 1582 if (grp) { 1583 1584 /* 1585 * Hang all of the host(s) off of the directory point. 1586 */ 1587 do { 1588 hp = get_ht(); 1589 hp->ht_grp = grp; 1590 hp->ht_next = dp->dp_hosts; 1591 dp->dp_hosts = hp; 1592 grp = grp->gr_next; 1593 } while (grp); 1594 } else { 1595 dp->dp_flag |= DP_DEFSET; 1596 } 1597 } 1598 1599 /* 1600 * Search for a dirpath on the export point. 1601 */ 1602 struct dirlist * 1603 dirp_search(struct dirlist *dp, char *dirp) 1604 { 1605 int cmp; 1606 1607 if (dp) { 1608 cmp = strcmp(dp->dp_dirp, dirp); 1609 if (cmp > 0) 1610 return (dirp_search(dp->dp_left, dirp)); 1611 else if (cmp < 0) 1612 return (dirp_search(dp->dp_right, dirp)); 1613 else 1614 return (dp); 1615 } 1616 return (dp); 1617 } 1618 1619 /* 1620 * Scan for a host match in a directory tree. 1621 */ 1622 int 1623 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 1624 int *hostsetp) 1625 { 1626 struct hostlist *hp; 1627 struct grouplist *grp; 1628 struct addrinfo *ai; 1629 1630 if (dp) { 1631 if (dp->dp_flag & DP_DEFSET) 1632 *defsetp = dp->dp_flag; 1633 hp = dp->dp_hosts; 1634 while (hp) { 1635 grp = hp->ht_grp; 1636 switch (grp->gr_type) { 1637 case GT_HOST: 1638 ai = grp->gr_ptr.gt_addrinfo; 1639 for (; ai; ai = ai->ai_next) { 1640 if (!sacmp(ai->ai_addr, saddr, NULL)) { 1641 *hostsetp = 1642 (hp->ht_flag | DP_HOSTSET); 1643 return (1); 1644 } 1645 } 1646 break; 1647 case GT_NET: 1648 if (!sacmp(saddr, (struct sockaddr *) 1649 &grp->gr_ptr.gt_net.nt_net, 1650 (struct sockaddr *) 1651 &grp->gr_ptr.gt_net.nt_mask)) { 1652 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1653 return (1); 1654 } 1655 break; 1656 } 1657 hp = hp->ht_next; 1658 } 1659 } 1660 return (0); 1661 } 1662 1663 /* 1664 * Scan tree for a host that matches the address. 1665 */ 1666 int 1667 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 1668 { 1669 int defset, hostset; 1670 1671 if (dp) { 1672 if (scan_tree(dp->dp_left, saddr)) 1673 return (1); 1674 if (chk_host(dp, saddr, &defset, &hostset)) 1675 return (1); 1676 if (scan_tree(dp->dp_right, saddr)) 1677 return (1); 1678 } 1679 return (0); 1680 } 1681 1682 /* 1683 * Traverse the dirlist tree and free it up. 1684 */ 1685 void 1686 free_dir(struct dirlist *dp) 1687 { 1688 1689 if (dp) { 1690 free_dir(dp->dp_left); 1691 free_dir(dp->dp_right); 1692 free_host(dp->dp_hosts); 1693 free((caddr_t)dp); 1694 } 1695 } 1696 1697 /* 1698 * Parse the option string and update fields. 1699 * Option arguments may either be -<option>=<value> or 1700 * -<option> <value> 1701 */ 1702 int 1703 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 1704 int *has_hostp, int *exflagsp, struct ucred *cr) 1705 { 1706 char *cpoptarg, *cpoptend; 1707 char *cp, *endcp, *cpopt, savedc, savedc2; 1708 int allflag, usedarg; 1709 1710 savedc2 = '\0'; 1711 cpopt = *cpp; 1712 cpopt++; 1713 cp = *endcpp; 1714 savedc = *cp; 1715 *cp = '\0'; 1716 while (cpopt && *cpopt) { 1717 allflag = 1; 1718 usedarg = -2; 1719 if ((cpoptend = strchr(cpopt, ','))) { 1720 *cpoptend++ = '\0'; 1721 if ((cpoptarg = strchr(cpopt, '='))) 1722 *cpoptarg++ = '\0'; 1723 } else { 1724 if ((cpoptarg = strchr(cpopt, '='))) 1725 *cpoptarg++ = '\0'; 1726 else { 1727 *cp = savedc; 1728 nextfield(&cp, &endcp); 1729 **endcpp = '\0'; 1730 if (endcp > cp && *cp != '-') { 1731 cpoptarg = cp; 1732 savedc2 = *endcp; 1733 *endcp = '\0'; 1734 usedarg = 0; 1735 } 1736 } 1737 } 1738 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 1739 *exflagsp |= MNT_EXRDONLY; 1740 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 1741 !(allflag = strcmp(cpopt, "mapall")) || 1742 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 1743 usedarg++; 1744 parsecred(cpoptarg, cr); 1745 if (allflag == 0) { 1746 *exflagsp |= MNT_EXPORTANON; 1747 opt_flags |= OP_MAPALL; 1748 } else 1749 opt_flags |= OP_MAPROOT; 1750 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 1751 !strcmp(cpopt, "m"))) { 1752 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 1753 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 1754 return (1); 1755 } 1756 usedarg++; 1757 opt_flags |= OP_MASK; 1758 } else if (cpoptarg && (!strcmp(cpopt, "network") || 1759 !strcmp(cpopt, "n"))) { 1760 if (strchr(cpoptarg, '/') != NULL) { 1761 if (debug) 1762 fprintf(stderr, "setting OP_MASKLEN\n"); 1763 opt_flags |= OP_MASKLEN; 1764 } 1765 if (grp->gr_type != GT_NULL) { 1766 syslog(LOG_ERR, "network/host conflict"); 1767 return (1); 1768 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 1769 syslog(LOG_ERR, "bad net: %s", cpoptarg); 1770 return (1); 1771 } 1772 grp->gr_type = GT_NET; 1773 *has_hostp = 1; 1774 usedarg++; 1775 opt_flags |= OP_NET; 1776 } else if (!strcmp(cpopt, "alldirs")) { 1777 opt_flags |= OP_ALLDIRS; 1778 } else if (!strcmp(cpopt, "public")) { 1779 *exflagsp |= MNT_EXPUBLIC; 1780 } else if (!strcmp(cpopt, "webnfs")) { 1781 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 1782 opt_flags |= OP_MAPALL; 1783 } else if (cpoptarg && !strcmp(cpopt, "index")) { 1784 ep->ex_indexfile = strdup(cpoptarg); 1785 } else if (!strcmp(cpopt, "quiet")) { 1786 opt_flags |= OP_QUIET; 1787 } else { 1788 syslog(LOG_ERR, "bad opt %s", cpopt); 1789 return (1); 1790 } 1791 if (usedarg >= 0) { 1792 *endcp = savedc2; 1793 **endcpp = savedc; 1794 if (usedarg > 0) { 1795 *cpp = cp; 1796 *endcpp = endcp; 1797 } 1798 return (0); 1799 } 1800 cpopt = cpoptend; 1801 } 1802 **endcpp = savedc; 1803 return (0); 1804 } 1805 1806 /* 1807 * Translate a character string to the corresponding list of network 1808 * addresses for a hostname. 1809 */ 1810 int 1811 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 1812 { 1813 struct grouplist *checkgrp; 1814 struct addrinfo *ai, *tai, hints; 1815 int ecode; 1816 char host[NI_MAXHOST]; 1817 1818 if (grp->gr_type != GT_NULL) { 1819 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 1820 return (1); 1821 } 1822 memset(&hints, 0, sizeof hints); 1823 hints.ai_flags = AI_CANONNAME; 1824 hints.ai_protocol = IPPROTO_UDP; 1825 ecode = getaddrinfo(cp, NULL, &hints, &ai); 1826 if (ecode != 0) { 1827 syslog(LOG_ERR,"can't get address info for host %s", cp); 1828 return 1; 1829 } 1830 grp->gr_ptr.gt_addrinfo = ai; 1831 while (ai != NULL) { 1832 if (ai->ai_canonname == NULL) { 1833 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 1834 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 1835 strlcpy(host, "?", sizeof(host)); 1836 ai->ai_canonname = strdup(host); 1837 ai->ai_flags |= AI_CANONNAME; 1838 } 1839 if (debug) 1840 fprintf(stderr, "got host %s\n", ai->ai_canonname); 1841 /* 1842 * Sanity check: make sure we don't already have an entry 1843 * for this host in the grouplist. 1844 */ 1845 for (checkgrp = tgrp; checkgrp != NULL; 1846 checkgrp = checkgrp->gr_next) { 1847 if (checkgrp->gr_type != GT_HOST) 1848 continue; 1849 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 1850 tai = tai->ai_next) { 1851 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 1852 continue; 1853 if (debug) 1854 fprintf(stderr, 1855 "ignoring duplicate host %s\n", 1856 ai->ai_canonname); 1857 grp->gr_type = GT_IGNORE; 1858 return (0); 1859 } 1860 } 1861 ai = ai->ai_next; 1862 } 1863 grp->gr_type = GT_HOST; 1864 return (0); 1865 } 1866 1867 /* 1868 * Free up an exports list component 1869 */ 1870 void 1871 free_exp(struct exportlist *ep) 1872 { 1873 1874 if (ep->ex_defdir) { 1875 free_host(ep->ex_defdir->dp_hosts); 1876 free((caddr_t)ep->ex_defdir); 1877 } 1878 if (ep->ex_fsdir) 1879 free(ep->ex_fsdir); 1880 if (ep->ex_indexfile) 1881 free(ep->ex_indexfile); 1882 free_dir(ep->ex_dirl); 1883 free((caddr_t)ep); 1884 } 1885 1886 /* 1887 * Free hosts. 1888 */ 1889 void 1890 free_host(struct hostlist *hp) 1891 { 1892 struct hostlist *hp2; 1893 1894 while (hp) { 1895 hp2 = hp; 1896 hp = hp->ht_next; 1897 free((caddr_t)hp2); 1898 } 1899 } 1900 1901 struct hostlist * 1902 get_ht(void) 1903 { 1904 struct hostlist *hp; 1905 1906 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 1907 if (hp == NULL) 1908 out_of_mem(); 1909 hp->ht_next = NULL; 1910 hp->ht_flag = 0; 1911 return (hp); 1912 } 1913 1914 /* 1915 * Out of memory, fatal 1916 */ 1917 void 1918 out_of_mem(void) 1919 { 1920 1921 syslog(LOG_ERR, "out of memory"); 1922 exit(2); 1923 } 1924 1925 /* 1926 * Do the mount syscall with the update flag to push the export info into 1927 * the kernel. 1928 */ 1929 int 1930 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 1931 struct ucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 1932 { 1933 struct statfs fsb1; 1934 struct addrinfo *ai; 1935 struct export_args *eap; 1936 char *cp = NULL; 1937 int done; 1938 char savedc = '\0'; 1939 union { 1940 struct ufs_args ua; 1941 struct iso_args ia; 1942 struct mfs_args ma; 1943 struct msdosfs_args da; 1944 struct ntfs_args na; 1945 } args; 1946 1947 bzero(&args, sizeof args); 1948 /* XXX, we assume that all xx_args look like ufs_args. */ 1949 args.ua.fspec = 0; 1950 eap = &args.ua.export; 1951 1952 eap->ex_flags = exflags; 1953 eap->ex_anon = *anoncrp; 1954 eap->ex_indexfile = ep->ex_indexfile; 1955 if (grp->gr_type == GT_HOST) 1956 ai = grp->gr_ptr.gt_addrinfo; 1957 else 1958 ai = NULL; 1959 done = FALSE; 1960 while (!done) { 1961 switch (grp->gr_type) { 1962 case GT_HOST: 1963 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 1964 goto skip; 1965 eap->ex_addr = ai->ai_addr; 1966 eap->ex_addrlen = ai->ai_addrlen; 1967 eap->ex_masklen = 0; 1968 break; 1969 case GT_NET: 1970 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 1971 have_v6 == 0) 1972 goto skip; 1973 eap->ex_addr = 1974 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 1975 eap->ex_addrlen = args.ua.export.ex_addr->sa_len; 1976 eap->ex_mask = 1977 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 1978 eap->ex_masklen = args.ua.export.ex_mask->sa_len; 1979 break; 1980 case GT_DEFAULT: 1981 eap->ex_addr = NULL; 1982 eap->ex_addrlen = 0; 1983 eap->ex_mask = NULL; 1984 eap->ex_masklen = 0; 1985 break; 1986 case GT_IGNORE: 1987 return(0); 1988 break; 1989 default: 1990 syslog(LOG_ERR, "bad grouptype"); 1991 if (cp) 1992 *cp = savedc; 1993 return (1); 1994 } 1995 1996 /* 1997 * XXX: 1998 * Maybe I should just use the fsb->f_mntonname path instead 1999 * of looping back up the dirp to the mount point?? 2000 * Also, needs to know how to export all types of local 2001 * exportable filesystems and not just "ufs". 2002 */ 2003 for (;;) { 2004 int r; 2005 2006 r = mountctl(fsb->f_mntonname, MOUNTCTL_SET_EXPORT, 2007 -1, 2008 &args.ua.export, sizeof(args.ua.export), 2009 NULL, 0); 2010 if (r < 0 && errno == EOPNOTSUPP) { 2011 r = mount(fsb->f_fstypename, dirp, 2012 fsb->f_flags | MNT_UPDATE, 2013 (caddr_t)&args); 2014 } 2015 if (r >= 0) 2016 break; 2017 if (cp) 2018 *cp-- = savedc; 2019 else 2020 cp = dirp + dirplen - 1; 2021 if (opt_flags & OP_QUIET) 2022 return (1); 2023 if (errno == EPERM) { 2024 if (debug) 2025 warnx("can't change attributes for %s", 2026 dirp); 2027 syslog(LOG_ERR, 2028 "can't change attributes for %s", dirp); 2029 return (1); 2030 } 2031 if (opt_flags & OP_ALLDIRS) { 2032 if (errno == EINVAL) 2033 syslog(LOG_ERR, 2034 "-alldirs requested but %s is not a filesystem mountpoint", 2035 dirp); 2036 else 2037 syslog(LOG_ERR, 2038 "could not remount %s: %m", 2039 dirp); 2040 return (1); 2041 } 2042 /* back up over the last component */ 2043 while (*cp == '/' && cp > dirp) 2044 cp--; 2045 while (*(cp - 1) != '/' && cp > dirp) 2046 cp--; 2047 if (cp == dirp) { 2048 if (debug) 2049 warnx("mnt unsucc"); 2050 syslog(LOG_ERR, "can't export %s", dirp); 2051 return (1); 2052 } 2053 savedc = *cp; 2054 *cp = '\0'; 2055 /* Check that we're still on the same filesystem. */ 2056 if (statfs(dirp, &fsb1) != 0 || bcmp(&fsb1.f_fsid, 2057 &fsb->f_fsid, sizeof(fsb1.f_fsid)) != 0) { 2058 *cp = savedc; 2059 syslog(LOG_ERR, "can't export %s", dirp); 2060 return (1); 2061 } 2062 } 2063 skip: 2064 if (ai != NULL) 2065 ai = ai->ai_next; 2066 if (ai == NULL) 2067 done = TRUE; 2068 } 2069 if (cp) 2070 *cp = savedc; 2071 return (0); 2072 } 2073 2074 /* 2075 * Translate a net address. 2076 * 2077 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2078 */ 2079 int 2080 get_net(char *cp, struct netmsk *net, int maskflg) 2081 { 2082 struct netent *np = NULL; 2083 char *name, *p, *prefp; 2084 struct sockaddr_in sin; 2085 struct sockaddr *sa = NULL; 2086 struct addrinfo hints, *ai = NULL; 2087 char netname[NI_MAXHOST]; 2088 long preflen; 2089 2090 p = prefp = NULL; 2091 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2092 p = strchr(cp, '/'); 2093 *p = '\0'; 2094 prefp = p + 1; 2095 } 2096 2097 /* 2098 * Check for a numeric address first. We wish to avoid 2099 * possible DNS lookups in getnetbyname(). 2100 */ 2101 if (isxdigit(*cp) || *cp == ':') { 2102 memset(&hints, 0, sizeof hints); 2103 /* Ensure the mask and the network have the same family. */ 2104 if (maskflg && (opt_flags & OP_NET)) 2105 hints.ai_family = net->nt_net.ss_family; 2106 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2107 hints.ai_family = net->nt_mask.ss_family; 2108 else 2109 hints.ai_family = AF_UNSPEC; 2110 hints.ai_flags = AI_NUMERICHOST; 2111 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2112 sa = ai->ai_addr; 2113 if (sa != NULL && ai->ai_family == AF_INET) { 2114 /* 2115 * The address in `cp' is really a network address, so 2116 * use inet_network() to re-interpret this correctly. 2117 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2118 */ 2119 bzero(&sin, sizeof sin); 2120 sin.sin_family = AF_INET; 2121 sin.sin_len = sizeof sin; 2122 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2123 if (debug) 2124 fprintf(stderr, "get_net: v4 addr %s\n", 2125 inet_ntoa(sin.sin_addr)); 2126 sa = (struct sockaddr *)&sin; 2127 } 2128 } 2129 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2130 bzero(&sin, sizeof sin); 2131 sin.sin_family = AF_INET; 2132 sin.sin_len = sizeof sin; 2133 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2134 sa = (struct sockaddr *)&sin; 2135 } 2136 if (sa == NULL) 2137 goto fail; 2138 2139 if (maskflg) { 2140 /* The specified sockaddr is a mask. */ 2141 if (checkmask(sa) != 0) 2142 goto fail; 2143 bcopy(sa, &net->nt_mask, sa->sa_len); 2144 opt_flags |= OP_HAVEMASK; 2145 } else { 2146 /* The specified sockaddr is a network address. */ 2147 bcopy(sa, &net->nt_net, sa->sa_len); 2148 2149 /* Get a network name for the export list. */ 2150 if (np) { 2151 name = np->n_name; 2152 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2153 NULL, 0, NI_NUMERICHOST) == 0) { 2154 name = netname; 2155 } else { 2156 goto fail; 2157 } 2158 if ((net->nt_name = strdup(name)) == NULL) 2159 out_of_mem(); 2160 2161 /* 2162 * Extract a mask from either a "/<masklen>" suffix, or 2163 * from the class of an IPv4 address. 2164 */ 2165 if (opt_flags & OP_MASKLEN) { 2166 preflen = strtol(prefp, NULL, 10); 2167 if (preflen < 0L || preflen == LONG_MAX) 2168 goto fail; 2169 bcopy(sa, &net->nt_mask, sa->sa_len); 2170 if (makemask(&net->nt_mask, (int)preflen) != 0) 2171 goto fail; 2172 opt_flags |= OP_HAVEMASK; 2173 *p = '/'; 2174 } else if (sa->sa_family == AF_INET && 2175 (opt_flags & OP_MASK) == 0) { 2176 in_addr_t addr; 2177 2178 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2179 if (IN_CLASSA(addr)) 2180 preflen = 8; 2181 else if (IN_CLASSB(addr)) 2182 preflen = 16; 2183 else if (IN_CLASSC(addr)) 2184 preflen = 24; 2185 else if (IN_CLASSD(addr)) 2186 preflen = 28; 2187 else 2188 preflen = 32; /* XXX */ 2189 2190 bcopy(sa, &net->nt_mask, sa->sa_len); 2191 makemask(&net->nt_mask, (int)preflen); 2192 opt_flags |= OP_HAVEMASK; 2193 } 2194 } 2195 2196 if (ai) 2197 freeaddrinfo(ai); 2198 return 0; 2199 2200 fail: 2201 if (ai) 2202 freeaddrinfo(ai); 2203 return 1; 2204 } 2205 2206 /* 2207 * Parse out the next white space separated field 2208 */ 2209 void 2210 nextfield(char **cp, char **endcp) 2211 { 2212 char *p; 2213 2214 p = *cp; 2215 while (*p == ' ' || *p == '\t') 2216 p++; 2217 if (*p == '\n' || *p == '\0') 2218 *cp = *endcp = p; 2219 else { 2220 *cp = p++; 2221 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2222 p++; 2223 *endcp = p; 2224 } 2225 } 2226 2227 /* 2228 * Get an exports file line. Skip over blank lines and handle line 2229 * continuations. 2230 */ 2231 int 2232 get_line(void) 2233 { 2234 char *p, *cp; 2235 size_t len; 2236 int totlen, cont_line; 2237 2238 /* 2239 * Loop around ignoring blank lines and getting all continuation lines. 2240 */ 2241 p = line; 2242 totlen = 0; 2243 do { 2244 if ((p = fgetln(exp_file, &len)) == NULL) 2245 return (0); 2246 cp = p + len - 1; 2247 cont_line = 0; 2248 while (cp >= p && 2249 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2250 if (*cp == '\\') 2251 cont_line = 1; 2252 cp--; 2253 len--; 2254 } 2255 if (cont_line) { 2256 *++cp = ' '; 2257 len++; 2258 } 2259 if (linesize < len + totlen + 1) { 2260 linesize = len + totlen + 1; 2261 line = realloc(line, linesize); 2262 if (line == NULL) 2263 out_of_mem(); 2264 } 2265 memcpy(line + totlen, p, len); 2266 totlen += len; 2267 line[totlen] = '\0'; 2268 } while (totlen == 0 || cont_line); 2269 return (1); 2270 } 2271 2272 /* 2273 * Parse a description of a credential. 2274 */ 2275 void 2276 parsecred(char *namelist, struct ucred *cr) 2277 { 2278 char *name; 2279 int cnt; 2280 char *names; 2281 struct passwd *pw; 2282 struct group *gr; 2283 gid_t ngroups, groups[NGROUPS + 1]; 2284 2285 /* 2286 * Set up the unprivileged user. 2287 */ 2288 cr->cr_ref = 1; 2289 cr->cr_uid = -2; 2290 cr->cr_groups[0] = -2; 2291 cr->cr_ngroups = 1; 2292 /* 2293 * Get the user's password table entry. 2294 */ 2295 names = strsep(&namelist, " \t\n"); 2296 name = strsep(&names, ":"); 2297 if (isdigit(*name) || *name == '-') 2298 pw = getpwuid(atoi(name)); 2299 else 2300 pw = getpwnam(name); 2301 /* 2302 * Credentials specified as those of a user. 2303 */ 2304 if (names == NULL) { 2305 if (pw == NULL) { 2306 syslog(LOG_ERR, "unknown user: %s", name); 2307 return; 2308 } 2309 cr->cr_uid = pw->pw_uid; 2310 ngroups = NGROUPS + 1; 2311 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2312 syslog(LOG_ERR, "too many groups"); 2313 /* 2314 * Compress out duplicate 2315 */ 2316 cr->cr_ngroups = ngroups - 1; 2317 cr->cr_groups[0] = groups[0]; 2318 for (cnt = 2; cnt < ngroups; cnt++) 2319 cr->cr_groups[cnt - 1] = groups[cnt]; 2320 return; 2321 } 2322 /* 2323 * Explicit credential specified as a colon separated list: 2324 * uid:gid:gid:... 2325 */ 2326 if (pw != NULL) 2327 cr->cr_uid = pw->pw_uid; 2328 else if (isdigit(*name) || *name == '-') 2329 cr->cr_uid = atoi(name); 2330 else { 2331 syslog(LOG_ERR, "unknown user: %s", name); 2332 return; 2333 } 2334 cr->cr_ngroups = 0; 2335 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) { 2336 name = strsep(&names, ":"); 2337 if (isdigit(*name) || *name == '-') { 2338 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2339 } else { 2340 if ((gr = getgrnam(name)) == NULL) { 2341 syslog(LOG_ERR, "unknown group: %s", name); 2342 continue; 2343 } 2344 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2345 } 2346 } 2347 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS) 2348 syslog(LOG_ERR, "too many groups"); 2349 } 2350 2351 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 2352 /* 2353 * Routines that maintain the remote mounttab 2354 */ 2355 void 2356 get_mountlist(void) 2357 { 2358 struct mountlist *mlp, **mlpp; 2359 char *host, *dirp, *cp; 2360 char str[STRSIZ]; 2361 FILE *mlfile; 2362 2363 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2364 if (errno == ENOENT) 2365 return; 2366 else { 2367 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 2368 return; 2369 } 2370 } 2371 mlpp = &mlhead; 2372 while (fgets(str, STRSIZ, mlfile) != NULL) { 2373 cp = str; 2374 host = strsep(&cp, " \t\n"); 2375 dirp = strsep(&cp, " \t\n"); 2376 if (host == NULL || dirp == NULL) 2377 continue; 2378 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2379 if (mlp == NULL) 2380 out_of_mem(); 2381 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 2382 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2383 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2384 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2385 mlp->ml_next = NULL; 2386 *mlpp = mlp; 2387 mlpp = &mlp->ml_next; 2388 } 2389 fclose(mlfile); 2390 } 2391 2392 void 2393 del_mlist(char *hostp, char *dirp) 2394 { 2395 struct mountlist *mlp, **mlpp; 2396 struct mountlist *mlp2; 2397 FILE *mlfile; 2398 int fnd = 0; 2399 2400 mlpp = &mlhead; 2401 mlp = mlhead; 2402 while (mlp) { 2403 if (!strcmp(mlp->ml_host, hostp) && 2404 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2405 fnd = 1; 2406 mlp2 = mlp; 2407 *mlpp = mlp = mlp->ml_next; 2408 free((caddr_t)mlp2); 2409 } else { 2410 mlpp = &mlp->ml_next; 2411 mlp = mlp->ml_next; 2412 } 2413 } 2414 if (fnd) { 2415 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2416 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 2417 return; 2418 } 2419 mlp = mlhead; 2420 while (mlp) { 2421 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2422 mlp = mlp->ml_next; 2423 } 2424 fclose(mlfile); 2425 } 2426 } 2427 2428 void 2429 add_mlist(char *hostp, char *dirp) 2430 { 2431 struct mountlist *mlp, **mlpp; 2432 FILE *mlfile; 2433 2434 mlpp = &mlhead; 2435 mlp = mlhead; 2436 while (mlp) { 2437 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2438 return; 2439 mlpp = &mlp->ml_next; 2440 mlp = mlp->ml_next; 2441 } 2442 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2443 if (mlp == NULL) 2444 out_of_mem(); 2445 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2446 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2447 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2448 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2449 mlp->ml_next = NULL; 2450 *mlpp = mlp; 2451 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2452 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 2453 return; 2454 } 2455 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2456 fclose(mlfile); 2457 } 2458 2459 /* 2460 * Free up a group list. 2461 */ 2462 void 2463 free_grp(struct grouplist *grp) 2464 { 2465 if (grp->gr_type == GT_HOST) { 2466 if (grp->gr_ptr.gt_addrinfo != NULL) 2467 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 2468 } else if (grp->gr_type == GT_NET) { 2469 if (grp->gr_ptr.gt_net.nt_name) 2470 free(grp->gr_ptr.gt_net.nt_name); 2471 } 2472 free((caddr_t)grp); 2473 } 2474 2475 #ifdef DEBUG 2476 void 2477 SYSLOG(int pri, const char *fmt, ...) 2478 { 2479 va_list ap; 2480 2481 va_start(ap, fmt); 2482 vfprintf(stderr, fmt, ap); 2483 va_end(ap); 2484 } 2485 #endif /* DEBUG */ 2486 2487 /* 2488 * Check options for consistency. 2489 */ 2490 int 2491 check_options(struct dirlist *dp) 2492 { 2493 2494 if (dp == NULL) 2495 return (1); 2496 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 2497 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 2498 return (1); 2499 } 2500 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2501 syslog(LOG_ERR, "-mask requires -network"); 2502 return (1); 2503 } 2504 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 2505 syslog(LOG_ERR, "-network requires mask specification"); 2506 return (1); 2507 } 2508 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 2509 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 2510 return (1); 2511 } 2512 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2513 syslog(LOG_ERR, "-alldirs has multiple directories"); 2514 return (1); 2515 } 2516 return (0); 2517 } 2518 2519 /* 2520 * Check an absolute directory path for any symbolic links. Return true 2521 */ 2522 int 2523 check_dirpath(char *dirp) 2524 { 2525 char *cp; 2526 int ret = 1; 2527 struct stat sb; 2528 2529 cp = dirp + 1; 2530 while (*cp && ret) { 2531 if (*cp == '/') { 2532 *cp = '\0'; 2533 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2534 ret = 0; 2535 *cp = '/'; 2536 } 2537 cp++; 2538 } 2539 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2540 ret = 0; 2541 return (ret); 2542 } 2543 2544 /* 2545 * Make a netmask according to the specified prefix length. The ss_family 2546 * and other non-address fields must be initialised before calling this. 2547 */ 2548 int 2549 makemask(struct sockaddr_storage *ssp, int bitlen) 2550 { 2551 u_char *p; 2552 int bits, i, len; 2553 2554 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 2555 return (-1); 2556 if (bitlen > len * CHAR_BIT) 2557 return (-1); 2558 for (i = 0; i < len; i++) { 2559 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 2560 *p++ = (1 << bits) - 1; 2561 bitlen -= bits; 2562 } 2563 return 0; 2564 } 2565 2566 /* 2567 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 2568 * is acceptable (i.e. of the form 1...10....0). 2569 */ 2570 int 2571 checkmask(struct sockaddr *sa) 2572 { 2573 u_char *mask; 2574 int i, len; 2575 2576 if ((mask = sa_rawaddr(sa, &len)) == NULL) 2577 return (-1); 2578 2579 for (i = 0; i < len; i++) 2580 if (mask[i] != 0xff) 2581 break; 2582 if (i < len) { 2583 if (~mask[i] & (u_char)(~mask[i] + 1)) 2584 return (-1); 2585 i++; 2586 } 2587 for (; i < len; i++) 2588 if (mask[i] != 0) 2589 return (-1); 2590 return (0); 2591 } 2592 2593 /* 2594 * Compare two sockaddrs according to a specified mask. Return zero if 2595 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 2596 * If samask is NULL, perform a full comparision. 2597 */ 2598 int 2599 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 2600 { 2601 unsigned char *p1, *p2, *mask; 2602 int len, i; 2603 2604 if (sa1->sa_family != sa2->sa_family || 2605 (p1 = sa_rawaddr(sa1, &len)) == NULL || 2606 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 2607 return (1); 2608 2609 switch (sa1->sa_family) { 2610 case AF_INET6: 2611 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 2612 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 2613 return (1); 2614 break; 2615 } 2616 2617 /* Simple binary comparison if no mask specified. */ 2618 if (samask == NULL) 2619 return (memcmp(p1, p2, len)); 2620 2621 /* Set up the mask, and do a mask-based comparison. */ 2622 if (sa1->sa_family != samask->sa_family || 2623 (mask = sa_rawaddr(samask, NULL)) == NULL) 2624 return (1); 2625 2626 for (i = 0; i < len; i++) 2627 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 2628 return (1); 2629 return (0); 2630 } 2631 2632 /* 2633 * Return a pointer to the part of the sockaddr that contains the 2634 * raw address, and set *nbytes to its length in bytes. Returns 2635 * NULL if the address family is unknown. 2636 */ 2637 void * 2638 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 2639 void *p; 2640 int len; 2641 2642 switch (sa->sa_family) { 2643 case AF_INET: 2644 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 2645 p = &((struct sockaddr_in *)sa)->sin_addr; 2646 break; 2647 case AF_INET6: 2648 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 2649 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 2650 break; 2651 default: 2652 p = NULL; 2653 len = 0; 2654 } 2655 2656 if (nbytes != NULL) 2657 *nbytes = len; 2658 return (p); 2659 } 2660 2661 void 2662 huphandler(int sig) 2663 { 2664 got_sighup = 1; 2665 } 2666 2667 void terminate(int sig) 2668 { 2669 pidfile_remove(pfh); 2670 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); 2671 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); 2672 exit (0); 2673 } 2674