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 * 4. 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 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1989, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /*not lint*/ 38 39 #if 0 40 #ifndef lint 41 static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95"; 42 #endif /*not lint*/ 43 #endif 44 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 #include <sys/param.h> 49 #include <sys/fcntl.h> 50 #include <sys/linker.h> 51 #include <sys/module.h> 52 #include <sys/mount.h> 53 #include <sys/stat.h> 54 #include <sys/sysctl.h> 55 #include <sys/syslog.h> 56 57 #include <rpc/rpc.h> 58 #include <rpc/rpc_com.h> 59 #include <rpc/pmap_clnt.h> 60 #include <rpc/pmap_prot.h> 61 #include <rpcsvc/mount.h> 62 #include <nfs/nfsproto.h> 63 #include <nfs/nfssvc.h> 64 #include <nfsserver/nfs.h> 65 66 #include <fs/nfs/nfsport.h> 67 68 #include <arpa/inet.h> 69 70 #include <ctype.h> 71 #include <err.h> 72 #include <errno.h> 73 #include <grp.h> 74 #include <libutil.h> 75 #include <limits.h> 76 #include <netdb.h> 77 #include <pwd.h> 78 #include <signal.h> 79 #include <stdio.h> 80 #include <stdlib.h> 81 #include <string.h> 82 #include <unistd.h> 83 #include "pathnames.h" 84 #include "mntopts.h" 85 86 #ifdef DEBUG 87 #include <stdarg.h> 88 #endif 89 90 /* 91 * Structures for keeping the mount list and export list 92 */ 93 struct mountlist { 94 struct mountlist *ml_next; 95 char ml_host[MNTNAMLEN+1]; 96 char ml_dirp[MNTPATHLEN+1]; 97 }; 98 99 struct dirlist { 100 struct dirlist *dp_left; 101 struct dirlist *dp_right; 102 int dp_flag; 103 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 104 char dp_dirp[1]; /* Actually malloc'd to size of dir */ 105 }; 106 /* dp_flag bits */ 107 #define DP_DEFSET 0x1 108 #define DP_HOSTSET 0x2 109 110 struct exportlist { 111 struct exportlist *ex_next; 112 struct dirlist *ex_dirl; 113 struct dirlist *ex_defdir; 114 int ex_flag; 115 fsid_t ex_fs; 116 char *ex_fsdir; 117 char *ex_indexfile; 118 int ex_numsecflavors; 119 int ex_secflavors[MAXSECFLAVORS]; 120 int ex_defnumsecflavors; 121 int ex_defsecflavors[MAXSECFLAVORS]; 122 }; 123 /* ex_flag bits */ 124 #define EX_LINKED 0x1 125 126 struct netmsk { 127 struct sockaddr_storage nt_net; 128 struct sockaddr_storage nt_mask; 129 char *nt_name; 130 }; 131 132 union grouptypes { 133 struct addrinfo *gt_addrinfo; 134 struct netmsk gt_net; 135 }; 136 137 struct grouplist { 138 int gr_type; 139 union grouptypes gr_ptr; 140 struct grouplist *gr_next; 141 int gr_numsecflavors; 142 int gr_secflavors[MAXSECFLAVORS]; 143 }; 144 /* Group types */ 145 #define GT_NULL 0x0 146 #define GT_HOST 0x1 147 #define GT_NET 0x2 148 #define GT_DEFAULT 0x3 149 #define GT_IGNORE 0x5 150 151 struct hostlist { 152 int ht_flag; /* Uses DP_xx bits */ 153 struct grouplist *ht_grp; 154 struct hostlist *ht_next; 155 }; 156 157 struct fhreturn { 158 int fhr_flag; 159 int fhr_vers; 160 nfsfh_t fhr_fh; 161 int fhr_numsecflavors; 162 int *fhr_secflavors; 163 }; 164 165 #define GETPORT_MAXTRY 20 /* Max tries to get a port # */ 166 167 /* Global defs */ 168 char *add_expdir(struct dirlist **, char *, int); 169 void add_dlist(struct dirlist **, struct dirlist *, 170 struct grouplist *, int, struct exportlist *); 171 void add_mlist(char *, char *); 172 int check_dirpath(char *); 173 int check_options(struct dirlist *); 174 int checkmask(struct sockaddr *sa); 175 int chk_host(struct dirlist *, struct sockaddr *, int *, int *, int *, 176 int **); 177 static int create_service(struct netconfig *nconf); 178 static void complete_service(struct netconfig *nconf, char *port_str); 179 static void clearout_service(void); 180 void del_mlist(char *hostp, char *dirp); 181 struct dirlist *dirp_search(struct dirlist *, char *); 182 int do_mount(struct exportlist *, struct grouplist *, int, 183 struct xucred *, char *, int, struct statfs *); 184 int do_opt(char **, char **, struct exportlist *, struct grouplist *, 185 int *, int *, struct xucred *); 186 struct exportlist *ex_search(fsid_t *); 187 struct exportlist *get_exp(void); 188 void free_dir(struct dirlist *); 189 void free_exp(struct exportlist *); 190 void free_grp(struct grouplist *); 191 void free_host(struct hostlist *); 192 void get_exportlist(void); 193 int get_host(char *, struct grouplist *, struct grouplist *); 194 struct hostlist *get_ht(void); 195 int get_line(void); 196 void get_mountlist(void); 197 int get_net(char *, struct netmsk *, int); 198 void getexp_err(struct exportlist *, struct grouplist *); 199 struct grouplist *get_grp(void); 200 void hang_dirp(struct dirlist *, struct grouplist *, 201 struct exportlist *, int); 202 void huphandler(int sig); 203 int makemask(struct sockaddr_storage *ssp, int bitlen); 204 void mntsrv(struct svc_req *, SVCXPRT *); 205 void nextfield(char **, char **); 206 void out_of_mem(void); 207 void parsecred(char *, struct xucred *); 208 int parsesec(char *, struct exportlist *); 209 int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int); 210 void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 211 int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 212 struct sockaddr *samask); 213 int scan_tree(struct dirlist *, struct sockaddr *); 214 static void usage(void); 215 int xdr_dir(XDR *, char *); 216 int xdr_explist(XDR *, caddr_t); 217 int xdr_explist_brief(XDR *, caddr_t); 218 int xdr_explist_common(XDR *, caddr_t, int); 219 int xdr_fhs(XDR *, caddr_t); 220 int xdr_mlist(XDR *, caddr_t); 221 void terminate(int); 222 223 struct exportlist *exphead; 224 struct mountlist *mlhead; 225 struct grouplist *grphead; 226 char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 227 char **exnames; 228 char **hosts = NULL; 229 struct xucred def_anon = { 230 XUCRED_VERSION, 231 (uid_t)-2, 232 1, 233 { (gid_t)-2 }, 234 NULL 235 }; 236 int force_v2 = 0; 237 int resvport_only = 1; 238 int nhosts = 0; 239 int dir_only = 1; 240 int dolog = 0; 241 int got_sighup = 0; 242 int xcreated = 0; 243 244 char *svcport_str = NULL; 245 static int mallocd_svcport = 0; 246 static int *sock_fd; 247 static int sock_fdcnt; 248 static int sock_fdpos; 249 static int suspend_nfsd = 0; 250 251 int opt_flags; 252 static int have_v6 = 1; 253 254 int v4root_phase = 0; 255 char v4root_dirpath[PATH_MAX + 1]; 256 int run_v4server = 1; 257 int has_publicfh = 0; 258 259 struct pidfh *pfh = NULL; 260 /* Bits for opt_flags above */ 261 #define OP_MAPROOT 0x01 262 #define OP_MAPALL 0x02 263 /* 0x4 free */ 264 #define OP_MASK 0x08 265 #define OP_NET 0x10 266 #define OP_ALLDIRS 0x40 267 #define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 268 #define OP_QUIET 0x100 269 #define OP_MASKLEN 0x200 270 #define OP_SEC 0x400 271 272 #ifdef DEBUG 273 int debug = 1; 274 void SYSLOG(int, const char *, ...) __printflike(2, 3); 275 #define syslog SYSLOG 276 #else 277 int debug = 0; 278 #endif 279 280 /* 281 * Mountd server for NFS mount protocol as described in: 282 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 283 * The optional arguments are the exports file name 284 * default: _PATH_EXPORTS 285 * and "-n" to allow nonroot mount. 286 */ 287 int 288 main(int argc, char **argv) 289 { 290 fd_set readfds; 291 struct netconfig *nconf; 292 char *endptr, **hosts_bak; 293 void *nc_handle; 294 pid_t otherpid; 295 in_port_t svcport; 296 int c, k, s; 297 int maxrec = RPC_MAXDATASIZE; 298 int attempt_cnt, port_len, port_pos, ret; 299 char **port_list; 300 301 /* Check that another mountd isn't already running. */ 302 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 303 if (pfh == NULL) { 304 if (errno == EEXIST) 305 errx(1, "mountd already running, pid: %d.", otherpid); 306 warn("cannot open or create pidfile"); 307 } 308 309 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 310 if (s < 0) 311 have_v6 = 0; 312 else 313 close(s); 314 315 while ((c = getopt(argc, argv, "2deh:lnop:rS")) != -1) 316 switch (c) { 317 case '2': 318 force_v2 = 1; 319 break; 320 case 'e': 321 /* now a no-op, since this is the default */ 322 break; 323 case 'n': 324 resvport_only = 0; 325 break; 326 case 'r': 327 dir_only = 0; 328 break; 329 case 'd': 330 debug = debug ? 0 : 1; 331 break; 332 case 'l': 333 dolog = 1; 334 break; 335 case 'o': 336 run_v4server = 0; 337 break; 338 case 'p': 339 endptr = NULL; 340 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 341 if (endptr == NULL || *endptr != '\0' || 342 svcport == 0 || svcport >= IPPORT_MAX) 343 usage(); 344 svcport_str = strdup(optarg); 345 break; 346 case 'h': 347 ++nhosts; 348 hosts_bak = hosts; 349 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 350 if (hosts_bak == NULL) { 351 if (hosts != NULL) { 352 for (k = 0; k < nhosts; k++) 353 free(hosts[k]); 354 free(hosts); 355 out_of_mem(); 356 } 357 } 358 hosts = hosts_bak; 359 hosts[nhosts - 1] = strdup(optarg); 360 if (hosts[nhosts - 1] == NULL) { 361 for (k = 0; k < (nhosts - 1); k++) 362 free(hosts[k]); 363 free(hosts); 364 out_of_mem(); 365 } 366 break; 367 case 'S': 368 suspend_nfsd = 1; 369 break; 370 default: 371 usage(); 372 }; 373 374 /* 375 * Unless the "-o" option was specified, try and run "nfsd". 376 * If "-o" was specified, try and run "nfsserver". 377 */ 378 if (run_v4server > 0) { 379 if (modfind("nfsd") < 0) { 380 /* Not present in kernel, try loading it */ 381 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 382 errx(1, "NFS server is not available"); 383 } 384 } else if (modfind("nfsserver") < 0) { 385 /* Not present in kernel, try loading it */ 386 if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0) 387 errx(1, "NFS server is not available"); 388 } 389 390 argc -= optind; 391 argv += optind; 392 grphead = (struct grouplist *)NULL; 393 exphead = (struct exportlist *)NULL; 394 mlhead = (struct mountlist *)NULL; 395 if (argc > 0) 396 exnames = argv; 397 else 398 exnames = exnames_default; 399 openlog("mountd", LOG_PID, LOG_DAEMON); 400 if (debug) 401 warnx("getting export list"); 402 get_exportlist(); 403 if (debug) 404 warnx("getting mount list"); 405 get_mountlist(); 406 if (debug) 407 warnx("here we go"); 408 if (debug == 0) { 409 daemon(0, 0); 410 signal(SIGINT, SIG_IGN); 411 signal(SIGQUIT, SIG_IGN); 412 } 413 signal(SIGHUP, huphandler); 414 signal(SIGTERM, terminate); 415 signal(SIGPIPE, SIG_IGN); 416 417 pidfile_write(pfh); 418 419 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 420 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 421 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 422 423 if (!resvport_only) { 424 if (sysctlbyname("vfs.nfsrv.nfs_privport", NULL, NULL, 425 &resvport_only, sizeof(resvport_only)) != 0 && 426 errno != ENOENT) { 427 syslog(LOG_ERR, "sysctl: %m"); 428 exit(1); 429 } 430 } 431 432 /* 433 * If no hosts were specified, add a wildcard entry to bind to 434 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the 435 * list. 436 */ 437 if (nhosts == 0) { 438 hosts = malloc(sizeof(char**)); 439 if (hosts == NULL) 440 out_of_mem(); 441 hosts[0] = "*"; 442 nhosts = 1; 443 } else { 444 hosts_bak = hosts; 445 if (have_v6) { 446 hosts_bak = realloc(hosts, (nhosts + 2) * 447 sizeof(char *)); 448 if (hosts_bak == NULL) { 449 for (k = 0; k < nhosts; k++) 450 free(hosts[k]); 451 free(hosts); 452 out_of_mem(); 453 } else 454 hosts = hosts_bak; 455 nhosts += 2; 456 hosts[nhosts - 2] = "::1"; 457 } else { 458 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *)); 459 if (hosts_bak == NULL) { 460 for (k = 0; k < nhosts; k++) 461 free(hosts[k]); 462 free(hosts); 463 out_of_mem(); 464 } else { 465 nhosts += 1; 466 hosts = hosts_bak; 467 } 468 } 469 470 hosts[nhosts - 1] = "127.0.0.1"; 471 } 472 473 attempt_cnt = 1; 474 sock_fdcnt = 0; 475 sock_fd = NULL; 476 port_list = NULL; 477 port_len = 0; 478 nc_handle = setnetconfig(); 479 while ((nconf = getnetconfig(nc_handle))) { 480 if (nconf->nc_flag & NC_VISIBLE) { 481 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 482 "inet6") == 0) { 483 /* DO NOTHING */ 484 } else { 485 ret = create_service(nconf); 486 if (ret == 1) 487 /* Ignore this call */ 488 continue; 489 if (ret < 0) { 490 /* 491 * Failed to bind port, so close off 492 * all sockets created and try again 493 * if the port# was dynamically 494 * assigned via bind(2). 495 */ 496 clearout_service(); 497 if (mallocd_svcport != 0 && 498 attempt_cnt < GETPORT_MAXTRY) { 499 free(svcport_str); 500 svcport_str = NULL; 501 mallocd_svcport = 0; 502 } else { 503 errno = EADDRINUSE; 504 syslog(LOG_ERR, 505 "bindresvport_sa: %m"); 506 exit(1); 507 } 508 509 /* Start over at the first service. */ 510 free(sock_fd); 511 sock_fdcnt = 0; 512 sock_fd = NULL; 513 nc_handle = setnetconfig(); 514 attempt_cnt++; 515 } else if (mallocd_svcport != 0 && 516 attempt_cnt == GETPORT_MAXTRY) { 517 /* 518 * For the last attempt, allow 519 * different port #s for each nconf 520 * by saving the svcport_str and 521 * setting it back to NULL. 522 */ 523 port_list = realloc(port_list, 524 (port_len + 1) * sizeof(char *)); 525 if (port_list == NULL) 526 out_of_mem(); 527 port_list[port_len++] = svcport_str; 528 svcport_str = NULL; 529 mallocd_svcport = 0; 530 } 531 } 532 } 533 } 534 535 /* 536 * Successfully bound the ports, so call complete_service() to 537 * do the rest of the setup on the service(s). 538 */ 539 sock_fdpos = 0; 540 port_pos = 0; 541 nc_handle = setnetconfig(); 542 while ((nconf = getnetconfig(nc_handle))) { 543 if (nconf->nc_flag & NC_VISIBLE) { 544 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 545 "inet6") == 0) { 546 /* DO NOTHING */ 547 } else if (port_list != NULL) { 548 if (port_pos >= port_len) { 549 syslog(LOG_ERR, "too many port#s"); 550 exit(1); 551 } 552 complete_service(nconf, port_list[port_pos++]); 553 } else 554 complete_service(nconf, svcport_str); 555 } 556 } 557 endnetconfig(nc_handle); 558 free(sock_fd); 559 if (port_list != NULL) { 560 for (port_pos = 0; port_pos < port_len; port_pos++) 561 free(port_list[port_pos]); 562 free(port_list); 563 } 564 565 if (xcreated == 0) { 566 syslog(LOG_ERR, "could not create any services"); 567 exit(1); 568 } 569 570 /* Expand svc_run() here so that we can call get_exportlist(). */ 571 for (;;) { 572 if (got_sighup) { 573 get_exportlist(); 574 got_sighup = 0; 575 } 576 readfds = svc_fdset; 577 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) { 578 case -1: 579 if (errno == EINTR) 580 continue; 581 syslog(LOG_ERR, "mountd died: select: %m"); 582 exit(1); 583 case 0: 584 continue; 585 default: 586 svc_getreqset(&readfds); 587 } 588 } 589 } 590 591 /* 592 * This routine creates and binds sockets on the appropriate 593 * addresses. It gets called one time for each transport. 594 * It returns 0 upon success, 1 for ingore the call and -1 to indicate 595 * bind failed with EADDRINUSE. 596 * Any file descriptors that have been created are stored in sock_fd and 597 * the total count of them is maintained in sock_fdcnt. 598 */ 599 static int 600 create_service(struct netconfig *nconf) 601 { 602 struct addrinfo hints, *res = NULL; 603 struct sockaddr_in *sin; 604 struct sockaddr_in6 *sin6; 605 struct __rpc_sockinfo si; 606 int aicode; 607 int fd; 608 int nhostsbak; 609 int one = 1; 610 int r; 611 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 612 int mallocd_res; 613 614 if ((nconf->nc_semantics != NC_TPI_CLTS) && 615 (nconf->nc_semantics != NC_TPI_COTS) && 616 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 617 return (1); /* not my type */ 618 619 /* 620 * XXX - using RPC library internal functions. 621 */ 622 if (!__rpc_nconf2sockinfo(nconf, &si)) { 623 syslog(LOG_ERR, "cannot get information for %s", 624 nconf->nc_netid); 625 return (1); 626 } 627 628 /* Get mountd's address on this transport */ 629 memset(&hints, 0, sizeof hints); 630 hints.ai_family = si.si_af; 631 hints.ai_socktype = si.si_socktype; 632 hints.ai_protocol = si.si_proto; 633 634 /* 635 * Bind to specific IPs if asked to 636 */ 637 nhostsbak = nhosts; 638 while (nhostsbak > 0) { 639 --nhostsbak; 640 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int)); 641 if (sock_fd == NULL) 642 out_of_mem(); 643 sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */ 644 mallocd_res = 0; 645 646 hints.ai_flags = AI_PASSIVE; 647 648 /* 649 * XXX - using RPC library internal functions. 650 */ 651 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 652 int non_fatal = 0; 653 if (errno == EAFNOSUPPORT && 654 nconf->nc_semantics != NC_TPI_CLTS) 655 non_fatal = 1; 656 657 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 658 "cannot create socket for %s", nconf->nc_netid); 659 if (non_fatal != 0) 660 continue; 661 exit(1); 662 } 663 664 switch (hints.ai_family) { 665 case AF_INET: 666 if (inet_pton(AF_INET, hosts[nhostsbak], 667 host_addr) == 1) { 668 hints.ai_flags |= AI_NUMERICHOST; 669 } else { 670 /* 671 * Skip if we have an AF_INET6 address. 672 */ 673 if (inet_pton(AF_INET6, hosts[nhostsbak], 674 host_addr) == 1) { 675 close(fd); 676 continue; 677 } 678 } 679 break; 680 case AF_INET6: 681 if (inet_pton(AF_INET6, hosts[nhostsbak], 682 host_addr) == 1) { 683 hints.ai_flags |= AI_NUMERICHOST; 684 } else { 685 /* 686 * Skip if we have an AF_INET address. 687 */ 688 if (inet_pton(AF_INET, hosts[nhostsbak], 689 host_addr) == 1) { 690 close(fd); 691 continue; 692 } 693 } 694 695 /* 696 * We're doing host-based access checks here, so don't 697 * allow v4-in-v6 to confuse things. The kernel will 698 * disable it by default on NFS sockets too. 699 */ 700 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 701 sizeof one) < 0) { 702 syslog(LOG_ERR, 703 "can't disable v4-in-v6 on IPv6 socket"); 704 exit(1); 705 } 706 break; 707 default: 708 break; 709 } 710 711 /* 712 * If no hosts were specified, just bind to INADDR_ANY 713 */ 714 if (strcmp("*", hosts[nhostsbak]) == 0) { 715 if (svcport_str == NULL) { 716 res = malloc(sizeof(struct addrinfo)); 717 if (res == NULL) 718 out_of_mem(); 719 mallocd_res = 1; 720 res->ai_flags = hints.ai_flags; 721 res->ai_family = hints.ai_family; 722 res->ai_protocol = hints.ai_protocol; 723 switch (res->ai_family) { 724 case AF_INET: 725 sin = malloc(sizeof(struct sockaddr_in)); 726 if (sin == NULL) 727 out_of_mem(); 728 sin->sin_family = AF_INET; 729 sin->sin_port = htons(0); 730 sin->sin_addr.s_addr = htonl(INADDR_ANY); 731 res->ai_addr = (struct sockaddr*) sin; 732 res->ai_addrlen = (socklen_t) 733 sizeof(struct sockaddr_in); 734 break; 735 case AF_INET6: 736 sin6 = malloc(sizeof(struct sockaddr_in6)); 737 if (sin6 == NULL) 738 out_of_mem(); 739 sin6->sin6_family = AF_INET6; 740 sin6->sin6_port = htons(0); 741 sin6->sin6_addr = in6addr_any; 742 res->ai_addr = (struct sockaddr*) sin6; 743 res->ai_addrlen = (socklen_t) 744 sizeof(struct sockaddr_in6); 745 break; 746 default: 747 syslog(LOG_ERR, "bad addr fam %d", 748 res->ai_family); 749 exit(1); 750 } 751 } else { 752 if ((aicode = getaddrinfo(NULL, svcport_str, 753 &hints, &res)) != 0) { 754 syslog(LOG_ERR, 755 "cannot get local address for %s: %s", 756 nconf->nc_netid, 757 gai_strerror(aicode)); 758 close(fd); 759 continue; 760 } 761 } 762 } else { 763 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 764 &hints, &res)) != 0) { 765 syslog(LOG_ERR, 766 "cannot get local address for %s: %s", 767 nconf->nc_netid, gai_strerror(aicode)); 768 close(fd); 769 continue; 770 } 771 } 772 773 /* Store the fd. */ 774 sock_fd[sock_fdcnt - 1] = fd; 775 776 /* Now, attempt the bind. */ 777 r = bindresvport_sa(fd, res->ai_addr); 778 if (r != 0) { 779 if (errno == EADDRINUSE && mallocd_svcport != 0) { 780 if (mallocd_res != 0) { 781 free(res->ai_addr); 782 free(res); 783 } else 784 freeaddrinfo(res); 785 return (-1); 786 } 787 syslog(LOG_ERR, "bindresvport_sa: %m"); 788 exit(1); 789 } 790 791 if (svcport_str == NULL) { 792 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 793 if (svcport_str == NULL) 794 out_of_mem(); 795 mallocd_svcport = 1; 796 797 if (getnameinfo(res->ai_addr, 798 res->ai_addr->sa_len, NULL, NI_MAXHOST, 799 svcport_str, NI_MAXSERV * sizeof(char), 800 NI_NUMERICHOST | NI_NUMERICSERV)) 801 errx(1, "Cannot get port number"); 802 } 803 if (mallocd_res != 0) { 804 free(res->ai_addr); 805 free(res); 806 } else 807 freeaddrinfo(res); 808 res = NULL; 809 } 810 return (0); 811 } 812 813 /* 814 * Called after all the create_service() calls have succeeded, to complete 815 * the setup and registration. 816 */ 817 static void 818 complete_service(struct netconfig *nconf, char *port_str) 819 { 820 struct addrinfo hints, *res = NULL; 821 struct __rpc_sockinfo si; 822 struct netbuf servaddr; 823 SVCXPRT *transp = NULL; 824 int aicode, fd, nhostsbak; 825 int registered = 0; 826 827 if ((nconf->nc_semantics != NC_TPI_CLTS) && 828 (nconf->nc_semantics != NC_TPI_COTS) && 829 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 830 return; /* not my type */ 831 832 /* 833 * XXX - using RPC library internal functions. 834 */ 835 if (!__rpc_nconf2sockinfo(nconf, &si)) { 836 syslog(LOG_ERR, "cannot get information for %s", 837 nconf->nc_netid); 838 return; 839 } 840 841 nhostsbak = nhosts; 842 while (nhostsbak > 0) { 843 --nhostsbak; 844 if (sock_fdpos >= sock_fdcnt) { 845 /* Should never happen. */ 846 syslog(LOG_ERR, "Ran out of socket fd's"); 847 return; 848 } 849 fd = sock_fd[sock_fdpos++]; 850 if (fd < 0) 851 continue; 852 853 if (nconf->nc_semantics != NC_TPI_CLTS) 854 listen(fd, SOMAXCONN); 855 856 if (nconf->nc_semantics == NC_TPI_CLTS ) 857 transp = svc_dg_create(fd, 0, 0); 858 else 859 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 860 RPC_MAXDATASIZE); 861 862 if (transp != (SVCXPRT *) NULL) { 863 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS, mntsrv, 864 NULL)) 865 syslog(LOG_ERR, 866 "can't register %s MOUNTVERS service", 867 nconf->nc_netid); 868 if (!force_v2) { 869 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS3, 870 mntsrv, NULL)) 871 syslog(LOG_ERR, 872 "can't register %s MOUNTVERS3 service", 873 nconf->nc_netid); 874 } 875 } else 876 syslog(LOG_WARNING, "can't create %s services", 877 nconf->nc_netid); 878 879 if (registered == 0) { 880 registered = 1; 881 memset(&hints, 0, sizeof hints); 882 hints.ai_flags = AI_PASSIVE; 883 hints.ai_family = si.si_af; 884 hints.ai_socktype = si.si_socktype; 885 hints.ai_protocol = si.si_proto; 886 887 if ((aicode = getaddrinfo(NULL, port_str, &hints, 888 &res)) != 0) { 889 syslog(LOG_ERR, "cannot get local address: %s", 890 gai_strerror(aicode)); 891 exit(1); 892 } 893 894 servaddr.buf = malloc(res->ai_addrlen); 895 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 896 servaddr.len = res->ai_addrlen; 897 898 rpcb_set(MOUNTPROG, MOUNTVERS, nconf, &servaddr); 899 rpcb_set(MOUNTPROG, MOUNTVERS3, nconf, &servaddr); 900 901 xcreated++; 902 freeaddrinfo(res); 903 } 904 } /* end while */ 905 } 906 907 /* 908 * Clear out sockets after a failure to bind one of them, so that the 909 * cycle of socket creation/binding can start anew. 910 */ 911 static void 912 clearout_service(void) 913 { 914 int i; 915 916 for (i = 0; i < sock_fdcnt; i++) { 917 if (sock_fd[i] >= 0) { 918 shutdown(sock_fd[i], SHUT_RDWR); 919 close(sock_fd[i]); 920 } 921 } 922 } 923 924 static void 925 usage(void) 926 { 927 fprintf(stderr, 928 "usage: mountd [-2] [-d] [-e] [-l] [-n] [-p <port>] [-r] " 929 "[-S] [-h <bindip>] [export_file ...]\n"); 930 exit(1); 931 } 932 933 /* 934 * The mount rpc service 935 */ 936 void 937 mntsrv(struct svc_req *rqstp, SVCXPRT *transp) 938 { 939 struct exportlist *ep; 940 struct dirlist *dp; 941 struct fhreturn fhr; 942 struct stat stb; 943 struct statfs fsb; 944 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 945 int lookup_failed = 1; 946 struct sockaddr *saddr; 947 u_short sport; 948 char rpcpath[MNTPATHLEN + 1], dirpath[MAXPATHLEN]; 949 int bad = 0, defset, hostset; 950 sigset_t sighup_mask; 951 int numsecflavors, *secflavorsp; 952 953 sigemptyset(&sighup_mask); 954 sigaddset(&sighup_mask, SIGHUP); 955 saddr = svc_getrpccaller(transp)->buf; 956 switch (saddr->sa_family) { 957 case AF_INET6: 958 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 959 break; 960 case AF_INET: 961 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 962 break; 963 default: 964 syslog(LOG_ERR, "request from unknown address family"); 965 return; 966 } 967 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host, 968 NULL, 0, 0); 969 getnameinfo(saddr, saddr->sa_len, numerichost, 970 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 971 switch (rqstp->rq_proc) { 972 case NULLPROC: 973 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 974 syslog(LOG_ERR, "can't send reply"); 975 return; 976 case MOUNTPROC_MNT: 977 if (sport >= IPPORT_RESERVED && resvport_only) { 978 syslog(LOG_NOTICE, 979 "mount request from %s from unprivileged port", 980 numerichost); 981 svcerr_weakauth(transp); 982 return; 983 } 984 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 985 syslog(LOG_NOTICE, "undecodable mount request from %s", 986 numerichost); 987 svcerr_decode(transp); 988 return; 989 } 990 991 /* 992 * Get the real pathname and make sure it is a directory 993 * or a regular file if the -r option was specified 994 * and it exists. 995 */ 996 if (realpath(rpcpath, dirpath) == NULL || 997 stat(dirpath, &stb) < 0 || 998 (!S_ISDIR(stb.st_mode) && 999 (dir_only || !S_ISREG(stb.st_mode))) || 1000 statfs(dirpath, &fsb) < 0) { 1001 chdir("/"); /* Just in case realpath doesn't */ 1002 syslog(LOG_NOTICE, 1003 "mount request from %s for non existent path %s", 1004 numerichost, dirpath); 1005 if (debug) 1006 warnx("stat failed on %s", dirpath); 1007 bad = ENOENT; /* We will send error reply later */ 1008 } 1009 1010 /* Check in the exports list */ 1011 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1012 ep = ex_search(&fsb.f_fsid); 1013 hostset = defset = 0; 1014 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset, 1015 &numsecflavors, &secflavorsp) || 1016 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 1017 chk_host(dp, saddr, &defset, &hostset, &numsecflavors, 1018 &secflavorsp)) || 1019 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 1020 scan_tree(ep->ex_dirl, saddr) == 0))) { 1021 if (bad) { 1022 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1023 (caddr_t)&bad)) 1024 syslog(LOG_ERR, "can't send reply"); 1025 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1026 return; 1027 } 1028 if (hostset & DP_HOSTSET) { 1029 fhr.fhr_flag = hostset; 1030 fhr.fhr_numsecflavors = numsecflavors; 1031 fhr.fhr_secflavors = secflavorsp; 1032 } else { 1033 fhr.fhr_flag = defset; 1034 fhr.fhr_numsecflavors = ep->ex_defnumsecflavors; 1035 fhr.fhr_secflavors = ep->ex_defsecflavors; 1036 } 1037 fhr.fhr_vers = rqstp->rq_vers; 1038 /* Get the file handle */ 1039 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 1040 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 1041 bad = errno; 1042 syslog(LOG_ERR, "can't get fh for %s", dirpath); 1043 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1044 (caddr_t)&bad)) 1045 syslog(LOG_ERR, "can't send reply"); 1046 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1047 return; 1048 } 1049 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, 1050 (caddr_t)&fhr)) 1051 syslog(LOG_ERR, "can't send reply"); 1052 if (!lookup_failed) 1053 add_mlist(host, dirpath); 1054 else 1055 add_mlist(numerichost, dirpath); 1056 if (debug) 1057 warnx("mount successful"); 1058 if (dolog) 1059 syslog(LOG_NOTICE, 1060 "mount request succeeded from %s for %s", 1061 numerichost, dirpath); 1062 } else { 1063 bad = EACCES; 1064 syslog(LOG_NOTICE, 1065 "mount request denied from %s for %s", 1066 numerichost, dirpath); 1067 } 1068 1069 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, 1070 (caddr_t)&bad)) 1071 syslog(LOG_ERR, "can't send reply"); 1072 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1073 return; 1074 case MOUNTPROC_DUMP: 1075 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL)) 1076 syslog(LOG_ERR, "can't send reply"); 1077 else if (dolog) 1078 syslog(LOG_NOTICE, 1079 "dump request succeeded from %s", 1080 numerichost); 1081 return; 1082 case MOUNTPROC_UMNT: 1083 if (sport >= IPPORT_RESERVED && resvport_only) { 1084 syslog(LOG_NOTICE, 1085 "umount request from %s from unprivileged port", 1086 numerichost); 1087 svcerr_weakauth(transp); 1088 return; 1089 } 1090 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1091 syslog(LOG_NOTICE, "undecodable umount request from %s", 1092 numerichost); 1093 svcerr_decode(transp); 1094 return; 1095 } 1096 if (realpath(rpcpath, dirpath) == NULL) { 1097 syslog(LOG_NOTICE, "umount request from %s " 1098 "for non existent path %s", 1099 numerichost, dirpath); 1100 } 1101 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1102 syslog(LOG_ERR, "can't send reply"); 1103 if (!lookup_failed) 1104 del_mlist(host, dirpath); 1105 del_mlist(numerichost, dirpath); 1106 if (dolog) 1107 syslog(LOG_NOTICE, 1108 "umount request succeeded from %s for %s", 1109 numerichost, dirpath); 1110 return; 1111 case MOUNTPROC_UMNTALL: 1112 if (sport >= IPPORT_RESERVED && resvport_only) { 1113 syslog(LOG_NOTICE, 1114 "umountall request from %s from unprivileged port", 1115 numerichost); 1116 svcerr_weakauth(transp); 1117 return; 1118 } 1119 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1120 syslog(LOG_ERR, "can't send reply"); 1121 if (!lookup_failed) 1122 del_mlist(host, NULL); 1123 del_mlist(numerichost, NULL); 1124 if (dolog) 1125 syslog(LOG_NOTICE, 1126 "umountall request succeeded from %s", 1127 numerichost); 1128 return; 1129 case MOUNTPROC_EXPORT: 1130 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL)) 1131 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, 1132 (caddr_t)NULL)) 1133 syslog(LOG_ERR, "can't send reply"); 1134 if (dolog) 1135 syslog(LOG_NOTICE, 1136 "export request succeeded from %s", 1137 numerichost); 1138 return; 1139 default: 1140 svcerr_noproc(transp); 1141 return; 1142 } 1143 } 1144 1145 /* 1146 * Xdr conversion for a dirpath string 1147 */ 1148 int 1149 xdr_dir(XDR *xdrsp, char *dirp) 1150 { 1151 return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); 1152 } 1153 1154 /* 1155 * Xdr routine to generate file handle reply 1156 */ 1157 int 1158 xdr_fhs(XDR *xdrsp, caddr_t cp) 1159 { 1160 struct fhreturn *fhrp = (struct fhreturn *)cp; 1161 u_long ok = 0, len, auth; 1162 int i; 1163 1164 if (!xdr_long(xdrsp, &ok)) 1165 return (0); 1166 switch (fhrp->fhr_vers) { 1167 case 1: 1168 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 1169 case 3: 1170 len = NFSX_V3FH; 1171 if (!xdr_long(xdrsp, &len)) 1172 return (0); 1173 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 1174 return (0); 1175 if (fhrp->fhr_numsecflavors) { 1176 if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors)) 1177 return (0); 1178 for (i = 0; i < fhrp->fhr_numsecflavors; i++) 1179 if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i])) 1180 return (0); 1181 return (1); 1182 } else { 1183 auth = AUTH_SYS; 1184 len = 1; 1185 if (!xdr_long(xdrsp, &len)) 1186 return (0); 1187 return (xdr_long(xdrsp, &auth)); 1188 } 1189 }; 1190 return (0); 1191 } 1192 1193 int 1194 xdr_mlist(XDR *xdrsp, caddr_t cp __unused) 1195 { 1196 struct mountlist *mlp; 1197 int true = 1; 1198 int false = 0; 1199 char *strp; 1200 1201 mlp = mlhead; 1202 while (mlp) { 1203 if (!xdr_bool(xdrsp, &true)) 1204 return (0); 1205 strp = &mlp->ml_host[0]; 1206 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 1207 return (0); 1208 strp = &mlp->ml_dirp[0]; 1209 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1210 return (0); 1211 mlp = mlp->ml_next; 1212 } 1213 if (!xdr_bool(xdrsp, &false)) 1214 return (0); 1215 return (1); 1216 } 1217 1218 /* 1219 * Xdr conversion for export list 1220 */ 1221 int 1222 xdr_explist_common(XDR *xdrsp, caddr_t cp __unused, int brief) 1223 { 1224 struct exportlist *ep; 1225 int false = 0; 1226 int putdef; 1227 sigset_t sighup_mask; 1228 1229 sigemptyset(&sighup_mask); 1230 sigaddset(&sighup_mask, SIGHUP); 1231 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1232 ep = exphead; 1233 while (ep) { 1234 putdef = 0; 1235 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 1236 &putdef, brief)) 1237 goto errout; 1238 if (ep->ex_defdir && putdef == 0 && 1239 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL, 1240 &putdef, brief)) 1241 goto errout; 1242 ep = ep->ex_next; 1243 } 1244 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1245 if (!xdr_bool(xdrsp, &false)) 1246 return (0); 1247 return (1); 1248 errout: 1249 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1250 return (0); 1251 } 1252 1253 /* 1254 * Called from xdr_explist() to traverse the tree and export the 1255 * directory paths. 1256 */ 1257 int 1258 put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, 1259 int brief) 1260 { 1261 struct grouplist *grp; 1262 struct hostlist *hp; 1263 int true = 1; 1264 int false = 0; 1265 int gotalldir = 0; 1266 char *strp; 1267 1268 if (dp) { 1269 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1270 return (1); 1271 if (!xdr_bool(xdrsp, &true)) 1272 return (1); 1273 strp = dp->dp_dirp; 1274 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1275 return (1); 1276 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1277 gotalldir = 1; 1278 *putdefp = 1; 1279 } 1280 if (brief) { 1281 if (!xdr_bool(xdrsp, &true)) 1282 return (1); 1283 strp = "(...)"; 1284 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1285 return (1); 1286 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1287 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1288 hp = dp->dp_hosts; 1289 while (hp) { 1290 grp = hp->ht_grp; 1291 if (grp->gr_type == GT_HOST) { 1292 if (!xdr_bool(xdrsp, &true)) 1293 return (1); 1294 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1295 if (!xdr_string(xdrsp, &strp, 1296 MNTNAMLEN)) 1297 return (1); 1298 } else if (grp->gr_type == GT_NET) { 1299 if (!xdr_bool(xdrsp, &true)) 1300 return (1); 1301 strp = grp->gr_ptr.gt_net.nt_name; 1302 if (!xdr_string(xdrsp, &strp, 1303 MNTNAMLEN)) 1304 return (1); 1305 } 1306 hp = hp->ht_next; 1307 if (gotalldir && hp == (struct hostlist *)NULL) { 1308 hp = adp->dp_hosts; 1309 gotalldir = 0; 1310 } 1311 } 1312 } 1313 if (!xdr_bool(xdrsp, &false)) 1314 return (1); 1315 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1316 return (1); 1317 } 1318 return (0); 1319 } 1320 1321 int 1322 xdr_explist(XDR *xdrsp, caddr_t cp) 1323 { 1324 1325 return xdr_explist_common(xdrsp, cp, 0); 1326 } 1327 1328 int 1329 xdr_explist_brief(XDR *xdrsp, caddr_t cp) 1330 { 1331 1332 return xdr_explist_common(xdrsp, cp, 1); 1333 } 1334 1335 char *line; 1336 int linesize; 1337 FILE *exp_file; 1338 1339 /* 1340 * Get the export list from one, currently open file 1341 */ 1342 static void 1343 get_exportlist_one(void) 1344 { 1345 struct exportlist *ep, *ep2; 1346 struct grouplist *grp, *tgrp; 1347 struct exportlist **epp; 1348 struct dirlist *dirhead; 1349 struct statfs fsb; 1350 struct xucred anon; 1351 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1352 int len, has_host, exflags, got_nondir, dirplen, netgrp; 1353 1354 v4root_phase = 0; 1355 dirhead = (struct dirlist *)NULL; 1356 while (get_line()) { 1357 if (debug) 1358 warnx("got line %s", line); 1359 cp = line; 1360 nextfield(&cp, &endcp); 1361 if (*cp == '#') 1362 goto nextline; 1363 1364 /* 1365 * Set defaults. 1366 */ 1367 has_host = FALSE; 1368 anon = def_anon; 1369 exflags = MNT_EXPORTED; 1370 got_nondir = 0; 1371 opt_flags = 0; 1372 ep = (struct exportlist *)NULL; 1373 dirp = NULL; 1374 1375 /* 1376 * Handle the V4 root dir. 1377 */ 1378 if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') { 1379 /* 1380 * V4: just indicates that it is the v4 root point, 1381 * so skip over that and set v4root_phase. 1382 */ 1383 if (v4root_phase > 0) { 1384 syslog(LOG_ERR, "V4:duplicate line, ignored"); 1385 goto nextline; 1386 } 1387 v4root_phase = 1; 1388 cp += 3; 1389 nextfield(&cp, &endcp); 1390 } 1391 1392 /* 1393 * Create new exports list entry 1394 */ 1395 len = endcp-cp; 1396 tgrp = grp = get_grp(); 1397 while (len > 0) { 1398 if (len > MNTNAMLEN) { 1399 getexp_err(ep, tgrp); 1400 goto nextline; 1401 } 1402 if (*cp == '-') { 1403 if (ep == (struct exportlist *)NULL) { 1404 getexp_err(ep, tgrp); 1405 goto nextline; 1406 } 1407 if (debug) 1408 warnx("doing opt %s", cp); 1409 got_nondir = 1; 1410 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1411 &exflags, &anon)) { 1412 getexp_err(ep, tgrp); 1413 goto nextline; 1414 } 1415 } else if (*cp == '/') { 1416 savedc = *endcp; 1417 *endcp = '\0'; 1418 if (v4root_phase > 1) { 1419 if (dirp != NULL) { 1420 syslog(LOG_ERR, "Multiple V4 dirs"); 1421 getexp_err(ep, tgrp); 1422 goto nextline; 1423 } 1424 } 1425 if (check_dirpath(cp) && 1426 statfs(cp, &fsb) >= 0) { 1427 if (got_nondir) { 1428 syslog(LOG_ERR, "dirs must be first"); 1429 getexp_err(ep, tgrp); 1430 goto nextline; 1431 } 1432 if (v4root_phase == 1) { 1433 if (dirp != NULL) { 1434 syslog(LOG_ERR, "Multiple V4 dirs"); 1435 getexp_err(ep, tgrp); 1436 goto nextline; 1437 } 1438 if (strlen(v4root_dirpath) == 0) { 1439 strlcpy(v4root_dirpath, cp, 1440 sizeof (v4root_dirpath)); 1441 } else if (strcmp(v4root_dirpath, cp) 1442 != 0) { 1443 syslog(LOG_ERR, 1444 "different V4 dirpath %s", cp); 1445 getexp_err(ep, tgrp); 1446 goto nextline; 1447 } 1448 dirp = cp; 1449 v4root_phase = 2; 1450 got_nondir = 1; 1451 ep = get_exp(); 1452 } else { 1453 if (ep) { 1454 if (ep->ex_fs.val[0] != 1455 fsb.f_fsid.val[0] || 1456 ep->ex_fs.val[1] != 1457 fsb.f_fsid.val[1]) { 1458 getexp_err(ep, tgrp); 1459 goto nextline; 1460 } 1461 } else { 1462 /* 1463 * See if this directory is already 1464 * in the list. 1465 */ 1466 ep = ex_search(&fsb.f_fsid); 1467 if (ep == (struct exportlist *)NULL) { 1468 ep = get_exp(); 1469 ep->ex_fs = fsb.f_fsid; 1470 ep->ex_fsdir = (char *)malloc 1471 (strlen(fsb.f_mntonname) + 1); 1472 if (ep->ex_fsdir) 1473 strcpy(ep->ex_fsdir, 1474 fsb.f_mntonname); 1475 else 1476 out_of_mem(); 1477 if (debug) 1478 warnx( 1479 "making new ep fs=0x%x,0x%x", 1480 fsb.f_fsid.val[0], 1481 fsb.f_fsid.val[1]); 1482 } else if (debug) 1483 warnx("found ep fs=0x%x,0x%x", 1484 fsb.f_fsid.val[0], 1485 fsb.f_fsid.val[1]); 1486 } 1487 1488 /* 1489 * Add dirpath to export mount point. 1490 */ 1491 dirp = add_expdir(&dirhead, cp, len); 1492 dirplen = len; 1493 } 1494 } else { 1495 getexp_err(ep, tgrp); 1496 goto nextline; 1497 } 1498 *endcp = savedc; 1499 } else { 1500 savedc = *endcp; 1501 *endcp = '\0'; 1502 got_nondir = 1; 1503 if (ep == (struct exportlist *)NULL) { 1504 getexp_err(ep, tgrp); 1505 goto nextline; 1506 } 1507 1508 /* 1509 * Get the host or netgroup. 1510 */ 1511 setnetgrent(cp); 1512 netgrp = getnetgrent(&hst, &usr, &dom); 1513 do { 1514 if (has_host) { 1515 grp->gr_next = get_grp(); 1516 grp = grp->gr_next; 1517 } 1518 if (netgrp) { 1519 if (hst == 0) { 1520 syslog(LOG_ERR, 1521 "null hostname in netgroup %s, skipping", cp); 1522 grp->gr_type = GT_IGNORE; 1523 } else if (get_host(hst, grp, tgrp)) { 1524 syslog(LOG_ERR, 1525 "bad host %s in netgroup %s, skipping", hst, cp); 1526 grp->gr_type = GT_IGNORE; 1527 } 1528 } else if (get_host(cp, grp, tgrp)) { 1529 syslog(LOG_ERR, "bad host %s, skipping", cp); 1530 grp->gr_type = GT_IGNORE; 1531 } 1532 has_host = TRUE; 1533 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1534 endnetgrent(); 1535 *endcp = savedc; 1536 } 1537 cp = endcp; 1538 nextfield(&cp, &endcp); 1539 len = endcp - cp; 1540 } 1541 if (check_options(dirhead)) { 1542 getexp_err(ep, tgrp); 1543 goto nextline; 1544 } 1545 if (!has_host) { 1546 grp->gr_type = GT_DEFAULT; 1547 if (debug) 1548 warnx("adding a default entry"); 1549 1550 /* 1551 * Don't allow a network export coincide with a list of 1552 * host(s) on the same line. 1553 */ 1554 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1555 syslog(LOG_ERR, "network/host conflict"); 1556 getexp_err(ep, tgrp); 1557 goto nextline; 1558 1559 /* 1560 * If an export list was specified on this line, make sure 1561 * that we have at least one valid entry, otherwise skip it. 1562 */ 1563 } else { 1564 grp = tgrp; 1565 while (grp && grp->gr_type == GT_IGNORE) 1566 grp = grp->gr_next; 1567 if (! grp) { 1568 getexp_err(ep, tgrp); 1569 goto nextline; 1570 } 1571 } 1572 1573 if (v4root_phase == 1) { 1574 syslog(LOG_ERR, "V4:root, no dirp, ignored"); 1575 getexp_err(ep, tgrp); 1576 goto nextline; 1577 } 1578 1579 /* 1580 * Loop through hosts, pushing the exports into the kernel. 1581 * After loop, tgrp points to the start of the list and 1582 * grp points to the last entry in the list. 1583 */ 1584 grp = tgrp; 1585 do { 1586 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen, 1587 &fsb)) { 1588 getexp_err(ep, tgrp); 1589 goto nextline; 1590 } 1591 } while (grp->gr_next && (grp = grp->gr_next)); 1592 1593 /* 1594 * For V4: don't enter in mount lists. 1595 */ 1596 if (v4root_phase > 0 && v4root_phase <= 2) { 1597 /* 1598 * Since these structures aren't used by mountd, 1599 * free them up now. 1600 */ 1601 if (ep != NULL) 1602 free_exp(ep); 1603 while (tgrp != NULL) { 1604 grp = tgrp; 1605 tgrp = tgrp->gr_next; 1606 free_grp(grp); 1607 } 1608 goto nextline; 1609 } 1610 1611 /* 1612 * Success. Update the data structures. 1613 */ 1614 if (has_host) { 1615 hang_dirp(dirhead, tgrp, ep, opt_flags); 1616 grp->gr_next = grphead; 1617 grphead = tgrp; 1618 } else { 1619 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1620 opt_flags); 1621 free_grp(grp); 1622 } 1623 dirhead = (struct dirlist *)NULL; 1624 if ((ep->ex_flag & EX_LINKED) == 0) { 1625 ep2 = exphead; 1626 epp = &exphead; 1627 1628 /* 1629 * Insert in the list in alphabetical order. 1630 */ 1631 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1632 epp = &ep2->ex_next; 1633 ep2 = ep2->ex_next; 1634 } 1635 if (ep2) 1636 ep->ex_next = ep2; 1637 *epp = ep; 1638 ep->ex_flag |= EX_LINKED; 1639 } 1640 nextline: 1641 v4root_phase = 0; 1642 if (dirhead) { 1643 free_dir(dirhead); 1644 dirhead = (struct dirlist *)NULL; 1645 } 1646 } 1647 } 1648 1649 /* 1650 * Get the export list from all specified files 1651 */ 1652 void 1653 get_exportlist(void) 1654 { 1655 struct exportlist *ep, *ep2; 1656 struct grouplist *grp, *tgrp; 1657 struct export_args export; 1658 struct iovec *iov; 1659 struct statfs *fsp, *mntbufp; 1660 struct xvfsconf vfc; 1661 char errmsg[255]; 1662 int num, i; 1663 int iovlen; 1664 int done; 1665 struct nfsex_args eargs; 1666 1667 if (suspend_nfsd != 0) 1668 (void)nfssvc(NFSSVC_SUSPENDNFSD, NULL); 1669 v4root_dirpath[0] = '\0'; 1670 bzero(&export, sizeof(export)); 1671 export.ex_flags = MNT_DELEXPORT; 1672 iov = NULL; 1673 iovlen = 0; 1674 bzero(errmsg, sizeof(errmsg)); 1675 1676 /* 1677 * First, get rid of the old list 1678 */ 1679 ep = exphead; 1680 while (ep) { 1681 ep2 = ep; 1682 ep = ep->ex_next; 1683 free_exp(ep2); 1684 } 1685 exphead = (struct exportlist *)NULL; 1686 1687 grp = grphead; 1688 while (grp) { 1689 tgrp = grp; 1690 grp = grp->gr_next; 1691 free_grp(tgrp); 1692 } 1693 grphead = (struct grouplist *)NULL; 1694 1695 /* 1696 * and the old V4 root dir. 1697 */ 1698 bzero(&eargs, sizeof (eargs)); 1699 eargs.export.ex_flags = MNT_DELEXPORT; 1700 if (run_v4server > 0 && 1701 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 && 1702 errno != ENOENT) 1703 syslog(LOG_ERR, "Can't delete exports for V4:"); 1704 1705 /* 1706 * and clear flag that notes if a public fh has been exported. 1707 */ 1708 has_publicfh = 0; 1709 1710 /* 1711 * And delete exports that are in the kernel for all local 1712 * filesystems. 1713 * XXX: Should know how to handle all local exportable filesystems. 1714 */ 1715 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1716 1717 if (num > 0) { 1718 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1719 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1720 build_iovec(&iov, &iovlen, "from", NULL, 0); 1721 build_iovec(&iov, &iovlen, "update", NULL, 0); 1722 build_iovec(&iov, &iovlen, "export", &export, sizeof(export)); 1723 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 1724 } 1725 1726 for (i = 0; i < num; i++) { 1727 fsp = &mntbufp[i]; 1728 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 1729 syslog(LOG_ERR, "getvfsbyname() failed for %s", 1730 fsp->f_fstypename); 1731 continue; 1732 } 1733 1734 /* 1735 * Do not delete export for network filesystem by 1736 * passing "export" arg to nmount(). 1737 * It only makes sense to do this for local filesystems. 1738 */ 1739 if (vfc.vfc_flags & VFCF_NETWORK) 1740 continue; 1741 1742 iov[1].iov_base = fsp->f_fstypename; 1743 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 1744 iov[3].iov_base = fsp->f_mntonname; 1745 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 1746 iov[5].iov_base = fsp->f_mntfromname; 1747 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 1748 errmsg[0] = '\0'; 1749 1750 /* 1751 * EXDEV is returned when path exists but is not a 1752 * mount point. May happens if raced with unmount. 1753 */ 1754 if (nmount(iov, iovlen, fsp->f_flags) < 0 && 1755 errno != ENOENT && errno != ENOTSUP && errno != EXDEV) { 1756 syslog(LOG_ERR, 1757 "can't delete exports for %s: %m %s", 1758 fsp->f_mntonname, errmsg); 1759 } 1760 } 1761 1762 if (iov != NULL) { 1763 /* Free strings allocated by strdup() in getmntopts.c */ 1764 free(iov[0].iov_base); /* fstype */ 1765 free(iov[2].iov_base); /* fspath */ 1766 free(iov[4].iov_base); /* from */ 1767 free(iov[6].iov_base); /* update */ 1768 free(iov[8].iov_base); /* export */ 1769 free(iov[10].iov_base); /* errmsg */ 1770 1771 /* free iov, allocated by realloc() */ 1772 free(iov); 1773 iovlen = 0; 1774 } 1775 1776 /* 1777 * Read in the exports file and build the list, calling 1778 * nmount() as we go along to push the export rules into the kernel. 1779 */ 1780 done = 0; 1781 for (i = 0; exnames[i] != NULL; i++) { 1782 if (debug) 1783 warnx("reading exports from %s", exnames[i]); 1784 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1785 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1786 continue; 1787 } 1788 get_exportlist_one(); 1789 fclose(exp_file); 1790 done++; 1791 } 1792 if (done == 0) { 1793 syslog(LOG_ERR, "can't open any exports file"); 1794 exit(2); 1795 } 1796 1797 /* 1798 * If there was no public fh, clear any previous one set. 1799 */ 1800 if (run_v4server > 0 && has_publicfh == 0) 1801 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1802 1803 /* Resume the nfsd. If they weren't suspended, this is harmless. */ 1804 (void)nfssvc(NFSSVC_RESUMENFSD, NULL); 1805 } 1806 1807 /* 1808 * Allocate an export list element 1809 */ 1810 struct exportlist * 1811 get_exp(void) 1812 { 1813 struct exportlist *ep; 1814 1815 ep = (struct exportlist *)calloc(1, sizeof (struct exportlist)); 1816 if (ep == (struct exportlist *)NULL) 1817 out_of_mem(); 1818 return (ep); 1819 } 1820 1821 /* 1822 * Allocate a group list element 1823 */ 1824 struct grouplist * 1825 get_grp(void) 1826 { 1827 struct grouplist *gp; 1828 1829 gp = (struct grouplist *)calloc(1, sizeof (struct grouplist)); 1830 if (gp == (struct grouplist *)NULL) 1831 out_of_mem(); 1832 return (gp); 1833 } 1834 1835 /* 1836 * Clean up upon an error in get_exportlist(). 1837 */ 1838 void 1839 getexp_err(struct exportlist *ep, struct grouplist *grp) 1840 { 1841 struct grouplist *tgrp; 1842 1843 if (!(opt_flags & OP_QUIET)) 1844 syslog(LOG_ERR, "bad exports list line %s", line); 1845 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1846 free_exp(ep); 1847 while (grp) { 1848 tgrp = grp; 1849 grp = grp->gr_next; 1850 free_grp(tgrp); 1851 } 1852 } 1853 1854 /* 1855 * Search the export list for a matching fs. 1856 */ 1857 struct exportlist * 1858 ex_search(fsid_t *fsid) 1859 { 1860 struct exportlist *ep; 1861 1862 ep = exphead; 1863 while (ep) { 1864 if (ep->ex_fs.val[0] == fsid->val[0] && 1865 ep->ex_fs.val[1] == fsid->val[1]) 1866 return (ep); 1867 ep = ep->ex_next; 1868 } 1869 return (ep); 1870 } 1871 1872 /* 1873 * Add a directory path to the list. 1874 */ 1875 char * 1876 add_expdir(struct dirlist **dpp, char *cp, int len) 1877 { 1878 struct dirlist *dp; 1879 1880 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1881 if (dp == (struct dirlist *)NULL) 1882 out_of_mem(); 1883 dp->dp_left = *dpp; 1884 dp->dp_right = (struct dirlist *)NULL; 1885 dp->dp_flag = 0; 1886 dp->dp_hosts = (struct hostlist *)NULL; 1887 strcpy(dp->dp_dirp, cp); 1888 *dpp = dp; 1889 return (dp->dp_dirp); 1890 } 1891 1892 /* 1893 * Hang the dir list element off the dirpath binary tree as required 1894 * and update the entry for host. 1895 */ 1896 void 1897 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 1898 int flags) 1899 { 1900 struct hostlist *hp; 1901 struct dirlist *dp2; 1902 1903 if (flags & OP_ALLDIRS) { 1904 if (ep->ex_defdir) 1905 free((caddr_t)dp); 1906 else 1907 ep->ex_defdir = dp; 1908 if (grp == (struct grouplist *)NULL) { 1909 ep->ex_defdir->dp_flag |= DP_DEFSET; 1910 /* Save the default security flavors list. */ 1911 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 1912 if (ep->ex_numsecflavors > 0) 1913 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 1914 sizeof(ep->ex_secflavors)); 1915 } else while (grp) { 1916 hp = get_ht(); 1917 hp->ht_grp = grp; 1918 hp->ht_next = ep->ex_defdir->dp_hosts; 1919 ep->ex_defdir->dp_hosts = hp; 1920 /* Save the security flavors list for this host set. */ 1921 grp->gr_numsecflavors = ep->ex_numsecflavors; 1922 if (ep->ex_numsecflavors > 0) 1923 memcpy(grp->gr_secflavors, ep->ex_secflavors, 1924 sizeof(ep->ex_secflavors)); 1925 grp = grp->gr_next; 1926 } 1927 } else { 1928 1929 /* 1930 * Loop through the directories adding them to the tree. 1931 */ 1932 while (dp) { 1933 dp2 = dp->dp_left; 1934 add_dlist(&ep->ex_dirl, dp, grp, flags, ep); 1935 dp = dp2; 1936 } 1937 } 1938 } 1939 1940 /* 1941 * Traverse the binary tree either updating a node that is already there 1942 * for the new directory or adding the new node. 1943 */ 1944 void 1945 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 1946 int flags, struct exportlist *ep) 1947 { 1948 struct dirlist *dp; 1949 struct hostlist *hp; 1950 int cmp; 1951 1952 dp = *dpp; 1953 if (dp) { 1954 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1955 if (cmp > 0) { 1956 add_dlist(&dp->dp_left, newdp, grp, flags, ep); 1957 return; 1958 } else if (cmp < 0) { 1959 add_dlist(&dp->dp_right, newdp, grp, flags, ep); 1960 return; 1961 } else 1962 free((caddr_t)newdp); 1963 } else { 1964 dp = newdp; 1965 dp->dp_left = (struct dirlist *)NULL; 1966 *dpp = dp; 1967 } 1968 if (grp) { 1969 1970 /* 1971 * Hang all of the host(s) off of the directory point. 1972 */ 1973 do { 1974 hp = get_ht(); 1975 hp->ht_grp = grp; 1976 hp->ht_next = dp->dp_hosts; 1977 dp->dp_hosts = hp; 1978 /* Save the security flavors list for this host set. */ 1979 grp->gr_numsecflavors = ep->ex_numsecflavors; 1980 if (ep->ex_numsecflavors > 0) 1981 memcpy(grp->gr_secflavors, ep->ex_secflavors, 1982 sizeof(ep->ex_secflavors)); 1983 grp = grp->gr_next; 1984 } while (grp); 1985 } else { 1986 dp->dp_flag |= DP_DEFSET; 1987 /* Save the default security flavors list. */ 1988 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 1989 if (ep->ex_numsecflavors > 0) 1990 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 1991 sizeof(ep->ex_secflavors)); 1992 } 1993 } 1994 1995 /* 1996 * Search for a dirpath on the export point. 1997 */ 1998 struct dirlist * 1999 dirp_search(struct dirlist *dp, char *dirp) 2000 { 2001 int cmp; 2002 2003 if (dp) { 2004 cmp = strcmp(dp->dp_dirp, dirp); 2005 if (cmp > 0) 2006 return (dirp_search(dp->dp_left, dirp)); 2007 else if (cmp < 0) 2008 return (dirp_search(dp->dp_right, dirp)); 2009 else 2010 return (dp); 2011 } 2012 return (dp); 2013 } 2014 2015 /* 2016 * Scan for a host match in a directory tree. 2017 */ 2018 int 2019 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 2020 int *hostsetp, int *numsecflavors, int **secflavorsp) 2021 { 2022 struct hostlist *hp; 2023 struct grouplist *grp; 2024 struct addrinfo *ai; 2025 2026 if (dp) { 2027 if (dp->dp_flag & DP_DEFSET) 2028 *defsetp = dp->dp_flag; 2029 hp = dp->dp_hosts; 2030 while (hp) { 2031 grp = hp->ht_grp; 2032 switch (grp->gr_type) { 2033 case GT_HOST: 2034 ai = grp->gr_ptr.gt_addrinfo; 2035 for (; ai; ai = ai->ai_next) { 2036 if (!sacmp(ai->ai_addr, saddr, NULL)) { 2037 *hostsetp = 2038 (hp->ht_flag | DP_HOSTSET); 2039 if (numsecflavors != NULL) { 2040 *numsecflavors = 2041 grp->gr_numsecflavors; 2042 *secflavorsp = 2043 grp->gr_secflavors; 2044 } 2045 return (1); 2046 } 2047 } 2048 break; 2049 case GT_NET: 2050 if (!sacmp(saddr, (struct sockaddr *) 2051 &grp->gr_ptr.gt_net.nt_net, 2052 (struct sockaddr *) 2053 &grp->gr_ptr.gt_net.nt_mask)) { 2054 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2055 if (numsecflavors != NULL) { 2056 *numsecflavors = 2057 grp->gr_numsecflavors; 2058 *secflavorsp = 2059 grp->gr_secflavors; 2060 } 2061 return (1); 2062 } 2063 break; 2064 } 2065 hp = hp->ht_next; 2066 } 2067 } 2068 return (0); 2069 } 2070 2071 /* 2072 * Scan tree for a host that matches the address. 2073 */ 2074 int 2075 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2076 { 2077 int defset, hostset; 2078 2079 if (dp) { 2080 if (scan_tree(dp->dp_left, saddr)) 2081 return (1); 2082 if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL)) 2083 return (1); 2084 if (scan_tree(dp->dp_right, saddr)) 2085 return (1); 2086 } 2087 return (0); 2088 } 2089 2090 /* 2091 * Traverse the dirlist tree and free it up. 2092 */ 2093 void 2094 free_dir(struct dirlist *dp) 2095 { 2096 2097 if (dp) { 2098 free_dir(dp->dp_left); 2099 free_dir(dp->dp_right); 2100 free_host(dp->dp_hosts); 2101 free((caddr_t)dp); 2102 } 2103 } 2104 2105 /* 2106 * Parse a colon separated list of security flavors 2107 */ 2108 int 2109 parsesec(char *seclist, struct exportlist *ep) 2110 { 2111 char *cp, savedc; 2112 int flavor; 2113 2114 ep->ex_numsecflavors = 0; 2115 for (;;) { 2116 cp = strchr(seclist, ':'); 2117 if (cp) { 2118 savedc = *cp; 2119 *cp = '\0'; 2120 } 2121 2122 if (!strcmp(seclist, "sys")) 2123 flavor = AUTH_SYS; 2124 else if (!strcmp(seclist, "krb5")) 2125 flavor = RPCSEC_GSS_KRB5; 2126 else if (!strcmp(seclist, "krb5i")) 2127 flavor = RPCSEC_GSS_KRB5I; 2128 else if (!strcmp(seclist, "krb5p")) 2129 flavor = RPCSEC_GSS_KRB5P; 2130 else { 2131 if (cp) 2132 *cp = savedc; 2133 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2134 return (1); 2135 } 2136 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2137 if (cp) 2138 *cp = savedc; 2139 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2140 return (1); 2141 } 2142 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2143 ep->ex_numsecflavors++; 2144 if (cp) { 2145 *cp = savedc; 2146 seclist = cp + 1; 2147 } else { 2148 break; 2149 } 2150 } 2151 return (0); 2152 } 2153 2154 /* 2155 * Parse the option string and update fields. 2156 * Option arguments may either be -<option>=<value> or 2157 * -<option> <value> 2158 */ 2159 int 2160 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2161 int *has_hostp, int *exflagsp, struct xucred *cr) 2162 { 2163 char *cpoptarg, *cpoptend; 2164 char *cp, *endcp, *cpopt, savedc, savedc2; 2165 int allflag, usedarg; 2166 2167 savedc2 = '\0'; 2168 cpopt = *cpp; 2169 cpopt++; 2170 cp = *endcpp; 2171 savedc = *cp; 2172 *cp = '\0'; 2173 while (cpopt && *cpopt) { 2174 allflag = 1; 2175 usedarg = -2; 2176 if ((cpoptend = strchr(cpopt, ','))) { 2177 *cpoptend++ = '\0'; 2178 if ((cpoptarg = strchr(cpopt, '='))) 2179 *cpoptarg++ = '\0'; 2180 } else { 2181 if ((cpoptarg = strchr(cpopt, '='))) 2182 *cpoptarg++ = '\0'; 2183 else { 2184 *cp = savedc; 2185 nextfield(&cp, &endcp); 2186 **endcpp = '\0'; 2187 if (endcp > cp && *cp != '-') { 2188 cpoptarg = cp; 2189 savedc2 = *endcp; 2190 *endcp = '\0'; 2191 usedarg = 0; 2192 } 2193 } 2194 } 2195 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2196 *exflagsp |= MNT_EXRDONLY; 2197 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2198 !(allflag = strcmp(cpopt, "mapall")) || 2199 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2200 usedarg++; 2201 parsecred(cpoptarg, cr); 2202 if (allflag == 0) { 2203 *exflagsp |= MNT_EXPORTANON; 2204 opt_flags |= OP_MAPALL; 2205 } else 2206 opt_flags |= OP_MAPROOT; 2207 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2208 !strcmp(cpopt, "m"))) { 2209 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2210 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2211 return (1); 2212 } 2213 usedarg++; 2214 opt_flags |= OP_MASK; 2215 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2216 !strcmp(cpopt, "n"))) { 2217 if (strchr(cpoptarg, '/') != NULL) { 2218 if (debug) 2219 fprintf(stderr, "setting OP_MASKLEN\n"); 2220 opt_flags |= OP_MASKLEN; 2221 } 2222 if (grp->gr_type != GT_NULL) { 2223 syslog(LOG_ERR, "network/host conflict"); 2224 return (1); 2225 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2226 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2227 return (1); 2228 } 2229 grp->gr_type = GT_NET; 2230 *has_hostp = 1; 2231 usedarg++; 2232 opt_flags |= OP_NET; 2233 } else if (!strcmp(cpopt, "alldirs")) { 2234 opt_flags |= OP_ALLDIRS; 2235 } else if (!strcmp(cpopt, "public")) { 2236 *exflagsp |= MNT_EXPUBLIC; 2237 } else if (!strcmp(cpopt, "webnfs")) { 2238 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2239 opt_flags |= OP_MAPALL; 2240 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2241 ep->ex_indexfile = strdup(cpoptarg); 2242 } else if (!strcmp(cpopt, "quiet")) { 2243 opt_flags |= OP_QUIET; 2244 } else if (cpoptarg && !strcmp(cpopt, "sec")) { 2245 if (parsesec(cpoptarg, ep)) 2246 return (1); 2247 opt_flags |= OP_SEC; 2248 usedarg++; 2249 } else { 2250 syslog(LOG_ERR, "bad opt %s", cpopt); 2251 return (1); 2252 } 2253 if (usedarg >= 0) { 2254 *endcp = savedc2; 2255 **endcpp = savedc; 2256 if (usedarg > 0) { 2257 *cpp = cp; 2258 *endcpp = endcp; 2259 } 2260 return (0); 2261 } 2262 cpopt = cpoptend; 2263 } 2264 **endcpp = savedc; 2265 return (0); 2266 } 2267 2268 /* 2269 * Translate a character string to the corresponding list of network 2270 * addresses for a hostname. 2271 */ 2272 int 2273 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 2274 { 2275 struct grouplist *checkgrp; 2276 struct addrinfo *ai, *tai, hints; 2277 int ecode; 2278 char host[NI_MAXHOST]; 2279 2280 if (grp->gr_type != GT_NULL) { 2281 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2282 return (1); 2283 } 2284 memset(&hints, 0, sizeof hints); 2285 hints.ai_flags = AI_CANONNAME; 2286 hints.ai_protocol = IPPROTO_UDP; 2287 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2288 if (ecode != 0) { 2289 syslog(LOG_ERR,"can't get address info for host %s", cp); 2290 return 1; 2291 } 2292 grp->gr_ptr.gt_addrinfo = ai; 2293 while (ai != NULL) { 2294 if (ai->ai_canonname == NULL) { 2295 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2296 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2297 strlcpy(host, "?", sizeof(host)); 2298 ai->ai_canonname = strdup(host); 2299 ai->ai_flags |= AI_CANONNAME; 2300 } 2301 if (debug) 2302 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2303 /* 2304 * Sanity check: make sure we don't already have an entry 2305 * for this host in the grouplist. 2306 */ 2307 for (checkgrp = tgrp; checkgrp != NULL; 2308 checkgrp = checkgrp->gr_next) { 2309 if (checkgrp->gr_type != GT_HOST) 2310 continue; 2311 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2312 tai = tai->ai_next) { 2313 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2314 continue; 2315 if (debug) 2316 fprintf(stderr, 2317 "ignoring duplicate host %s\n", 2318 ai->ai_canonname); 2319 grp->gr_type = GT_IGNORE; 2320 return (0); 2321 } 2322 } 2323 ai = ai->ai_next; 2324 } 2325 grp->gr_type = GT_HOST; 2326 return (0); 2327 } 2328 2329 /* 2330 * Free up an exports list component 2331 */ 2332 void 2333 free_exp(struct exportlist *ep) 2334 { 2335 2336 if (ep->ex_defdir) { 2337 free_host(ep->ex_defdir->dp_hosts); 2338 free((caddr_t)ep->ex_defdir); 2339 } 2340 if (ep->ex_fsdir) 2341 free(ep->ex_fsdir); 2342 if (ep->ex_indexfile) 2343 free(ep->ex_indexfile); 2344 free_dir(ep->ex_dirl); 2345 free((caddr_t)ep); 2346 } 2347 2348 /* 2349 * Free hosts. 2350 */ 2351 void 2352 free_host(struct hostlist *hp) 2353 { 2354 struct hostlist *hp2; 2355 2356 while (hp) { 2357 hp2 = hp; 2358 hp = hp->ht_next; 2359 free((caddr_t)hp2); 2360 } 2361 } 2362 2363 struct hostlist * 2364 get_ht(void) 2365 { 2366 struct hostlist *hp; 2367 2368 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2369 if (hp == (struct hostlist *)NULL) 2370 out_of_mem(); 2371 hp->ht_next = (struct hostlist *)NULL; 2372 hp->ht_flag = 0; 2373 return (hp); 2374 } 2375 2376 /* 2377 * Out of memory, fatal 2378 */ 2379 void 2380 out_of_mem(void) 2381 { 2382 2383 syslog(LOG_ERR, "out of memory"); 2384 exit(2); 2385 } 2386 2387 /* 2388 * Do the nmount() syscall with the update flag to push the export info into 2389 * the kernel. 2390 */ 2391 int 2392 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2393 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 2394 { 2395 struct statfs fsb1; 2396 struct addrinfo *ai; 2397 struct export_args ea, *eap; 2398 char errmsg[255]; 2399 char *cp; 2400 int done; 2401 char savedc; 2402 struct iovec *iov; 2403 int i, iovlen; 2404 int ret; 2405 struct nfsex_args nfsea; 2406 2407 if (run_v4server > 0) 2408 eap = &nfsea.export; 2409 else 2410 eap = &ea; 2411 2412 cp = NULL; 2413 savedc = '\0'; 2414 iov = NULL; 2415 iovlen = 0; 2416 ret = 0; 2417 2418 bzero(eap, sizeof (struct export_args)); 2419 bzero(errmsg, sizeof(errmsg)); 2420 eap->ex_flags = exflags; 2421 eap->ex_anon = *anoncrp; 2422 eap->ex_indexfile = ep->ex_indexfile; 2423 if (grp->gr_type == GT_HOST) 2424 ai = grp->gr_ptr.gt_addrinfo; 2425 else 2426 ai = NULL; 2427 eap->ex_numsecflavors = ep->ex_numsecflavors; 2428 for (i = 0; i < eap->ex_numsecflavors; i++) 2429 eap->ex_secflavors[i] = ep->ex_secflavors[i]; 2430 if (eap->ex_numsecflavors == 0) { 2431 eap->ex_numsecflavors = 1; 2432 eap->ex_secflavors[0] = AUTH_SYS; 2433 } 2434 done = FALSE; 2435 2436 if (v4root_phase == 0) { 2437 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2438 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2439 build_iovec(&iov, &iovlen, "from", NULL, 0); 2440 build_iovec(&iov, &iovlen, "update", NULL, 0); 2441 build_iovec(&iov, &iovlen, "export", eap, 2442 sizeof (struct export_args)); 2443 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 2444 } 2445 2446 while (!done) { 2447 switch (grp->gr_type) { 2448 case GT_HOST: 2449 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 2450 goto skip; 2451 eap->ex_addr = ai->ai_addr; 2452 eap->ex_addrlen = ai->ai_addrlen; 2453 eap->ex_masklen = 0; 2454 break; 2455 case GT_NET: 2456 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 2457 have_v6 == 0) 2458 goto skip; 2459 eap->ex_addr = 2460 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 2461 eap->ex_addrlen = 2462 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 2463 eap->ex_mask = 2464 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 2465 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 2466 break; 2467 case GT_DEFAULT: 2468 eap->ex_addr = NULL; 2469 eap->ex_addrlen = 0; 2470 eap->ex_mask = NULL; 2471 eap->ex_masklen = 0; 2472 break; 2473 case GT_IGNORE: 2474 ret = 0; 2475 goto error_exit; 2476 break; 2477 default: 2478 syslog(LOG_ERR, "bad grouptype"); 2479 if (cp) 2480 *cp = savedc; 2481 ret = 1; 2482 goto error_exit; 2483 }; 2484 2485 /* 2486 * For V4:, use the nfssvc() syscall, instead of mount(). 2487 */ 2488 if (v4root_phase == 2) { 2489 nfsea.fspec = v4root_dirpath; 2490 if (run_v4server > 0 && 2491 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 2492 syslog(LOG_ERR, "Exporting V4: failed"); 2493 return (2); 2494 } 2495 } else { 2496 /* 2497 * XXX: 2498 * Maybe I should just use the fsb->f_mntonname path 2499 * instead of looping back up the dirp to the mount 2500 * point?? 2501 * Also, needs to know how to export all types of local 2502 * exportable filesystems and not just "ufs". 2503 */ 2504 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 2505 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 2506 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 2507 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 2508 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 2509 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 2510 errmsg[0] = '\0'; 2511 2512 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 2513 if (cp) 2514 *cp-- = savedc; 2515 else 2516 cp = dirp + dirplen - 1; 2517 if (opt_flags & OP_QUIET) { 2518 ret = 1; 2519 goto error_exit; 2520 } 2521 if (errno == EPERM) { 2522 if (debug) 2523 warnx("can't change attributes for %s: %s", 2524 dirp, errmsg); 2525 syslog(LOG_ERR, 2526 "can't change attributes for %s: %s", 2527 dirp, errmsg); 2528 ret = 1; 2529 goto error_exit; 2530 } 2531 if (opt_flags & OP_ALLDIRS) { 2532 if (errno == EINVAL) 2533 syslog(LOG_ERR, 2534 "-alldirs requested but %s is not a filesystem mountpoint", 2535 dirp); 2536 else 2537 syslog(LOG_ERR, 2538 "could not remount %s: %m", 2539 dirp); 2540 ret = 1; 2541 goto error_exit; 2542 } 2543 /* back up over the last component */ 2544 while (*cp == '/' && cp > dirp) 2545 cp--; 2546 while (*(cp - 1) != '/' && cp > dirp) 2547 cp--; 2548 if (cp == dirp) { 2549 if (debug) 2550 warnx("mnt unsucc"); 2551 syslog(LOG_ERR, "can't export %s %s", 2552 dirp, errmsg); 2553 ret = 1; 2554 goto error_exit; 2555 } 2556 savedc = *cp; 2557 *cp = '\0'; 2558 /* 2559 * Check that we're still on the same 2560 * filesystem. 2561 */ 2562 if (statfs(dirp, &fsb1) != 0 || 2563 bcmp(&fsb1.f_fsid, &fsb->f_fsid, 2564 sizeof (fsb1.f_fsid)) != 0) { 2565 *cp = savedc; 2566 syslog(LOG_ERR, 2567 "can't export %s %s", dirp, 2568 errmsg); 2569 ret = 1; 2570 goto error_exit; 2571 } 2572 } 2573 } 2574 2575 /* 2576 * For the experimental server: 2577 * If this is the public directory, get the file handle 2578 * and load it into the kernel via the nfssvc() syscall. 2579 */ 2580 if (run_v4server > 0 && (exflags & MNT_EXPUBLIC) != 0) { 2581 fhandle_t fh; 2582 char *public_name; 2583 2584 if (eap->ex_indexfile != NULL) 2585 public_name = eap->ex_indexfile; 2586 else 2587 public_name = dirp; 2588 if (getfh(public_name, &fh) < 0) 2589 syslog(LOG_ERR, 2590 "Can't get public fh for %s", public_name); 2591 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 2592 syslog(LOG_ERR, 2593 "Can't set public fh for %s", public_name); 2594 else 2595 has_publicfh = 1; 2596 } 2597 skip: 2598 if (ai != NULL) 2599 ai = ai->ai_next; 2600 if (ai == NULL) 2601 done = TRUE; 2602 } 2603 if (cp) 2604 *cp = savedc; 2605 error_exit: 2606 /* free strings allocated by strdup() in getmntopts.c */ 2607 if (iov != NULL) { 2608 free(iov[0].iov_base); /* fstype */ 2609 free(iov[2].iov_base); /* fspath */ 2610 free(iov[4].iov_base); /* from */ 2611 free(iov[6].iov_base); /* update */ 2612 free(iov[8].iov_base); /* export */ 2613 free(iov[10].iov_base); /* errmsg */ 2614 2615 /* free iov, allocated by realloc() */ 2616 free(iov); 2617 } 2618 return (ret); 2619 } 2620 2621 /* 2622 * Translate a net address. 2623 * 2624 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2625 */ 2626 int 2627 get_net(char *cp, struct netmsk *net, int maskflg) 2628 { 2629 struct netent *np = NULL; 2630 char *name, *p, *prefp; 2631 struct sockaddr_in sin; 2632 struct sockaddr *sa = NULL; 2633 struct addrinfo hints, *ai = NULL; 2634 char netname[NI_MAXHOST]; 2635 long preflen; 2636 2637 p = prefp = NULL; 2638 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2639 p = strchr(cp, '/'); 2640 *p = '\0'; 2641 prefp = p + 1; 2642 } 2643 2644 /* 2645 * Check for a numeric address first. We wish to avoid 2646 * possible DNS lookups in getnetbyname(). 2647 */ 2648 if (isxdigit(*cp) || *cp == ':') { 2649 memset(&hints, 0, sizeof hints); 2650 /* Ensure the mask and the network have the same family. */ 2651 if (maskflg && (opt_flags & OP_NET)) 2652 hints.ai_family = net->nt_net.ss_family; 2653 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2654 hints.ai_family = net->nt_mask.ss_family; 2655 else 2656 hints.ai_family = AF_UNSPEC; 2657 hints.ai_flags = AI_NUMERICHOST; 2658 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2659 sa = ai->ai_addr; 2660 if (sa != NULL && ai->ai_family == AF_INET) { 2661 /* 2662 * The address in `cp' is really a network address, so 2663 * use inet_network() to re-interpret this correctly. 2664 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2665 */ 2666 bzero(&sin, sizeof sin); 2667 sin.sin_family = AF_INET; 2668 sin.sin_len = sizeof sin; 2669 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2670 if (debug) 2671 fprintf(stderr, "get_net: v4 addr %s\n", 2672 inet_ntoa(sin.sin_addr)); 2673 sa = (struct sockaddr *)&sin; 2674 } 2675 } 2676 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2677 bzero(&sin, sizeof sin); 2678 sin.sin_family = AF_INET; 2679 sin.sin_len = sizeof sin; 2680 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2681 sa = (struct sockaddr *)&sin; 2682 } 2683 if (sa == NULL) 2684 goto fail; 2685 2686 if (maskflg) { 2687 /* The specified sockaddr is a mask. */ 2688 if (checkmask(sa) != 0) 2689 goto fail; 2690 bcopy(sa, &net->nt_mask, sa->sa_len); 2691 opt_flags |= OP_HAVEMASK; 2692 } else { 2693 /* The specified sockaddr is a network address. */ 2694 bcopy(sa, &net->nt_net, sa->sa_len); 2695 2696 /* Get a network name for the export list. */ 2697 if (np) { 2698 name = np->n_name; 2699 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2700 NULL, 0, NI_NUMERICHOST) == 0) { 2701 name = netname; 2702 } else { 2703 goto fail; 2704 } 2705 if ((net->nt_name = strdup(name)) == NULL) 2706 out_of_mem(); 2707 2708 /* 2709 * Extract a mask from either a "/<masklen>" suffix, or 2710 * from the class of an IPv4 address. 2711 */ 2712 if (opt_flags & OP_MASKLEN) { 2713 preflen = strtol(prefp, NULL, 10); 2714 if (preflen < 0L || preflen == LONG_MAX) 2715 goto fail; 2716 bcopy(sa, &net->nt_mask, sa->sa_len); 2717 if (makemask(&net->nt_mask, (int)preflen) != 0) 2718 goto fail; 2719 opt_flags |= OP_HAVEMASK; 2720 *p = '/'; 2721 } else if (sa->sa_family == AF_INET && 2722 (opt_flags & OP_MASK) == 0) { 2723 in_addr_t addr; 2724 2725 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2726 if (IN_CLASSA(addr)) 2727 preflen = 8; 2728 else if (IN_CLASSB(addr)) 2729 preflen = 16; 2730 else if (IN_CLASSC(addr)) 2731 preflen = 24; 2732 else if (IN_CLASSD(addr)) 2733 preflen = 28; 2734 else 2735 preflen = 32; /* XXX */ 2736 2737 bcopy(sa, &net->nt_mask, sa->sa_len); 2738 makemask(&net->nt_mask, (int)preflen); 2739 opt_flags |= OP_HAVEMASK; 2740 } 2741 } 2742 2743 if (ai) 2744 freeaddrinfo(ai); 2745 return 0; 2746 2747 fail: 2748 if (ai) 2749 freeaddrinfo(ai); 2750 return 1; 2751 } 2752 2753 /* 2754 * Parse out the next white space separated field 2755 */ 2756 void 2757 nextfield(char **cp, char **endcp) 2758 { 2759 char *p; 2760 2761 p = *cp; 2762 while (*p == ' ' || *p == '\t') 2763 p++; 2764 if (*p == '\n' || *p == '\0') 2765 *cp = *endcp = p; 2766 else { 2767 *cp = p++; 2768 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2769 p++; 2770 *endcp = p; 2771 } 2772 } 2773 2774 /* 2775 * Get an exports file line. Skip over blank lines and handle line 2776 * continuations. 2777 */ 2778 int 2779 get_line(void) 2780 { 2781 char *p, *cp; 2782 size_t len; 2783 int totlen, cont_line; 2784 2785 /* 2786 * Loop around ignoring blank lines and getting all continuation lines. 2787 */ 2788 p = line; 2789 totlen = 0; 2790 do { 2791 if ((p = fgetln(exp_file, &len)) == NULL) 2792 return (0); 2793 cp = p + len - 1; 2794 cont_line = 0; 2795 while (cp >= p && 2796 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2797 if (*cp == '\\') 2798 cont_line = 1; 2799 cp--; 2800 len--; 2801 } 2802 if (cont_line) { 2803 *++cp = ' '; 2804 len++; 2805 } 2806 if (linesize < len + totlen + 1) { 2807 linesize = len + totlen + 1; 2808 line = realloc(line, linesize); 2809 if (line == NULL) 2810 out_of_mem(); 2811 } 2812 memcpy(line + totlen, p, len); 2813 totlen += len; 2814 line[totlen] = '\0'; 2815 } while (totlen == 0 || cont_line); 2816 return (1); 2817 } 2818 2819 /* 2820 * Parse a description of a credential. 2821 */ 2822 void 2823 parsecred(char *namelist, struct xucred *cr) 2824 { 2825 char *name; 2826 int cnt; 2827 char *names; 2828 struct passwd *pw; 2829 struct group *gr; 2830 gid_t groups[XU_NGROUPS + 1]; 2831 int ngroups; 2832 2833 cr->cr_version = XUCRED_VERSION; 2834 /* 2835 * Set up the unprivileged user. 2836 */ 2837 cr->cr_uid = -2; 2838 cr->cr_groups[0] = -2; 2839 cr->cr_ngroups = 1; 2840 /* 2841 * Get the user's password table entry. 2842 */ 2843 names = strsep(&namelist, " \t\n"); 2844 name = strsep(&names, ":"); 2845 if (isdigit(*name) || *name == '-') 2846 pw = getpwuid(atoi(name)); 2847 else 2848 pw = getpwnam(name); 2849 /* 2850 * Credentials specified as those of a user. 2851 */ 2852 if (names == NULL) { 2853 if (pw == NULL) { 2854 syslog(LOG_ERR, "unknown user: %s", name); 2855 return; 2856 } 2857 cr->cr_uid = pw->pw_uid; 2858 ngroups = XU_NGROUPS + 1; 2859 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2860 syslog(LOG_ERR, "too many groups"); 2861 /* 2862 * Compress out duplicate. 2863 */ 2864 cr->cr_ngroups = ngroups - 1; 2865 cr->cr_groups[0] = groups[0]; 2866 for (cnt = 2; cnt < ngroups; cnt++) 2867 cr->cr_groups[cnt - 1] = groups[cnt]; 2868 return; 2869 } 2870 /* 2871 * Explicit credential specified as a colon separated list: 2872 * uid:gid:gid:... 2873 */ 2874 if (pw != NULL) 2875 cr->cr_uid = pw->pw_uid; 2876 else if (isdigit(*name) || *name == '-') 2877 cr->cr_uid = atoi(name); 2878 else { 2879 syslog(LOG_ERR, "unknown user: %s", name); 2880 return; 2881 } 2882 cr->cr_ngroups = 0; 2883 while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) { 2884 name = strsep(&names, ":"); 2885 if (isdigit(*name) || *name == '-') { 2886 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2887 } else { 2888 if ((gr = getgrnam(name)) == NULL) { 2889 syslog(LOG_ERR, "unknown group: %s", name); 2890 continue; 2891 } 2892 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2893 } 2894 } 2895 if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS) 2896 syslog(LOG_ERR, "too many groups"); 2897 } 2898 2899 #define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 2900 /* 2901 * Routines that maintain the remote mounttab 2902 */ 2903 void 2904 get_mountlist(void) 2905 { 2906 struct mountlist *mlp, **mlpp; 2907 char *host, *dirp, *cp; 2908 char str[STRSIZ]; 2909 FILE *mlfile; 2910 2911 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2912 if (errno == ENOENT) 2913 return; 2914 else { 2915 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 2916 return; 2917 } 2918 } 2919 mlpp = &mlhead; 2920 while (fgets(str, STRSIZ, mlfile) != NULL) { 2921 cp = str; 2922 host = strsep(&cp, " \t\n"); 2923 dirp = strsep(&cp, " \t\n"); 2924 if (host == NULL || dirp == NULL) 2925 continue; 2926 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2927 if (mlp == (struct mountlist *)NULL) 2928 out_of_mem(); 2929 strncpy(mlp->ml_host, host, MNTNAMLEN); 2930 mlp->ml_host[MNTNAMLEN] = '\0'; 2931 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 2932 mlp->ml_dirp[MNTPATHLEN] = '\0'; 2933 mlp->ml_next = (struct mountlist *)NULL; 2934 *mlpp = mlp; 2935 mlpp = &mlp->ml_next; 2936 } 2937 fclose(mlfile); 2938 } 2939 2940 void 2941 del_mlist(char *hostp, char *dirp) 2942 { 2943 struct mountlist *mlp, **mlpp; 2944 struct mountlist *mlp2; 2945 FILE *mlfile; 2946 int fnd = 0; 2947 2948 mlpp = &mlhead; 2949 mlp = mlhead; 2950 while (mlp) { 2951 if (!strcmp(mlp->ml_host, hostp) && 2952 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2953 fnd = 1; 2954 mlp2 = mlp; 2955 *mlpp = mlp = mlp->ml_next; 2956 free((caddr_t)mlp2); 2957 } else { 2958 mlpp = &mlp->ml_next; 2959 mlp = mlp->ml_next; 2960 } 2961 } 2962 if (fnd) { 2963 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2964 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 2965 return; 2966 } 2967 mlp = mlhead; 2968 while (mlp) { 2969 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2970 mlp = mlp->ml_next; 2971 } 2972 fclose(mlfile); 2973 } 2974 } 2975 2976 void 2977 add_mlist(char *hostp, char *dirp) 2978 { 2979 struct mountlist *mlp, **mlpp; 2980 FILE *mlfile; 2981 2982 mlpp = &mlhead; 2983 mlp = mlhead; 2984 while (mlp) { 2985 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2986 return; 2987 mlpp = &mlp->ml_next; 2988 mlp = mlp->ml_next; 2989 } 2990 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2991 if (mlp == (struct mountlist *)NULL) 2992 out_of_mem(); 2993 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 2994 mlp->ml_host[MNTNAMLEN] = '\0'; 2995 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 2996 mlp->ml_dirp[MNTPATHLEN] = '\0'; 2997 mlp->ml_next = (struct mountlist *)NULL; 2998 *mlpp = mlp; 2999 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 3000 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 3001 return; 3002 } 3003 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3004 fclose(mlfile); 3005 } 3006 3007 /* 3008 * Free up a group list. 3009 */ 3010 void 3011 free_grp(struct grouplist *grp) 3012 { 3013 if (grp->gr_type == GT_HOST) { 3014 if (grp->gr_ptr.gt_addrinfo != NULL) 3015 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 3016 } else if (grp->gr_type == GT_NET) { 3017 if (grp->gr_ptr.gt_net.nt_name) 3018 free(grp->gr_ptr.gt_net.nt_name); 3019 } 3020 free((caddr_t)grp); 3021 } 3022 3023 #ifdef DEBUG 3024 void 3025 SYSLOG(int pri, const char *fmt, ...) 3026 { 3027 va_list ap; 3028 3029 va_start(ap, fmt); 3030 vfprintf(stderr, fmt, ap); 3031 va_end(ap); 3032 } 3033 #endif /* DEBUG */ 3034 3035 /* 3036 * Check options for consistency. 3037 */ 3038 int 3039 check_options(struct dirlist *dp) 3040 { 3041 3042 if (v4root_phase == 0 && dp == NULL) 3043 return (1); 3044 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 3045 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 3046 return (1); 3047 } 3048 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 3049 syslog(LOG_ERR, "-mask requires -network"); 3050 return (1); 3051 } 3052 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 3053 syslog(LOG_ERR, "-network requires mask specification"); 3054 return (1); 3055 } 3056 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3057 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3058 return (1); 3059 } 3060 if (v4root_phase > 0 && 3061 (opt_flags & 3062 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3063 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3064 return (1); 3065 } 3066 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3067 syslog(LOG_ERR, "-alldirs has multiple directories"); 3068 return (1); 3069 } 3070 return (0); 3071 } 3072 3073 /* 3074 * Check an absolute directory path for any symbolic links. Return true 3075 */ 3076 int 3077 check_dirpath(char *dirp) 3078 { 3079 char *cp; 3080 int ret = 1; 3081 struct stat sb; 3082 3083 cp = dirp + 1; 3084 while (*cp && ret) { 3085 if (*cp == '/') { 3086 *cp = '\0'; 3087 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3088 ret = 0; 3089 *cp = '/'; 3090 } 3091 cp++; 3092 } 3093 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3094 ret = 0; 3095 return (ret); 3096 } 3097 3098 /* 3099 * Make a netmask according to the specified prefix length. The ss_family 3100 * and other non-address fields must be initialised before calling this. 3101 */ 3102 int 3103 makemask(struct sockaddr_storage *ssp, int bitlen) 3104 { 3105 u_char *p; 3106 int bits, i, len; 3107 3108 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3109 return (-1); 3110 if (bitlen > len * CHAR_BIT) 3111 return (-1); 3112 3113 for (i = 0; i < len; i++) { 3114 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 3115 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3116 bitlen -= bits; 3117 } 3118 return 0; 3119 } 3120 3121 /* 3122 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 3123 * is acceptable (i.e. of the form 1...10....0). 3124 */ 3125 int 3126 checkmask(struct sockaddr *sa) 3127 { 3128 u_char *mask; 3129 int i, len; 3130 3131 if ((mask = sa_rawaddr(sa, &len)) == NULL) 3132 return (-1); 3133 3134 for (i = 0; i < len; i++) 3135 if (mask[i] != 0xff) 3136 break; 3137 if (i < len) { 3138 if (~mask[i] & (u_char)(~mask[i] + 1)) 3139 return (-1); 3140 i++; 3141 } 3142 for (; i < len; i++) 3143 if (mask[i] != 0) 3144 return (-1); 3145 return (0); 3146 } 3147 3148 /* 3149 * Compare two sockaddrs according to a specified mask. Return zero if 3150 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 3151 * If samask is NULL, perform a full comparison. 3152 */ 3153 int 3154 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 3155 { 3156 unsigned char *p1, *p2, *mask; 3157 int len, i; 3158 3159 if (sa1->sa_family != sa2->sa_family || 3160 (p1 = sa_rawaddr(sa1, &len)) == NULL || 3161 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 3162 return (1); 3163 3164 switch (sa1->sa_family) { 3165 case AF_INET6: 3166 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 3167 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 3168 return (1); 3169 break; 3170 } 3171 3172 /* Simple binary comparison if no mask specified. */ 3173 if (samask == NULL) 3174 return (memcmp(p1, p2, len)); 3175 3176 /* Set up the mask, and do a mask-based comparison. */ 3177 if (sa1->sa_family != samask->sa_family || 3178 (mask = sa_rawaddr(samask, NULL)) == NULL) 3179 return (1); 3180 3181 for (i = 0; i < len; i++) 3182 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3183 return (1); 3184 return (0); 3185 } 3186 3187 /* 3188 * Return a pointer to the part of the sockaddr that contains the 3189 * raw address, and set *nbytes to its length in bytes. Returns 3190 * NULL if the address family is unknown. 3191 */ 3192 void * 3193 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3194 void *p; 3195 int len; 3196 3197 switch (sa->sa_family) { 3198 case AF_INET: 3199 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3200 p = &((struct sockaddr_in *)sa)->sin_addr; 3201 break; 3202 case AF_INET6: 3203 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3204 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3205 break; 3206 default: 3207 p = NULL; 3208 len = 0; 3209 } 3210 3211 if (nbytes != NULL) 3212 *nbytes = len; 3213 return (p); 3214 } 3215 3216 void 3217 huphandler(int sig __unused) 3218 { 3219 got_sighup = 1; 3220 } 3221 3222 void terminate(int sig __unused) 3223 { 3224 pidfile_remove(pfh); 3225 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 3226 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 3227 exit (0); 3228 } 3229 3230