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