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 * We do not need to delete "export" flag from 1736 * filesystems that do not have it set. 1737 */ 1738 if (!(fsp->f_flags & MNT_EXPORTED)) 1739 continue; 1740 /* 1741 * Do not delete export for network filesystem by 1742 * passing "export" arg to nmount(). 1743 * It only makes sense to do this for local filesystems. 1744 */ 1745 if (vfc.vfc_flags & VFCF_NETWORK) 1746 continue; 1747 1748 iov[1].iov_base = fsp->f_fstypename; 1749 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 1750 iov[3].iov_base = fsp->f_mntonname; 1751 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 1752 iov[5].iov_base = fsp->f_mntfromname; 1753 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 1754 errmsg[0] = '\0'; 1755 1756 /* 1757 * EXDEV is returned when path exists but is not a 1758 * mount point. May happens if raced with unmount. 1759 */ 1760 if (nmount(iov, iovlen, fsp->f_flags) < 0 && 1761 errno != ENOENT && errno != ENOTSUP && errno != EXDEV) { 1762 syslog(LOG_ERR, 1763 "can't delete exports for %s: %m %s", 1764 fsp->f_mntonname, errmsg); 1765 } 1766 } 1767 1768 if (iov != NULL) { 1769 /* Free strings allocated by strdup() in getmntopts.c */ 1770 free(iov[0].iov_base); /* fstype */ 1771 free(iov[2].iov_base); /* fspath */ 1772 free(iov[4].iov_base); /* from */ 1773 free(iov[6].iov_base); /* update */ 1774 free(iov[8].iov_base); /* export */ 1775 free(iov[10].iov_base); /* errmsg */ 1776 1777 /* free iov, allocated by realloc() */ 1778 free(iov); 1779 iovlen = 0; 1780 } 1781 1782 /* 1783 * Read in the exports file and build the list, calling 1784 * nmount() as we go along to push the export rules into the kernel. 1785 */ 1786 done = 0; 1787 for (i = 0; exnames[i] != NULL; i++) { 1788 if (debug) 1789 warnx("reading exports from %s", exnames[i]); 1790 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1791 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1792 continue; 1793 } 1794 get_exportlist_one(); 1795 fclose(exp_file); 1796 done++; 1797 } 1798 if (done == 0) { 1799 syslog(LOG_ERR, "can't open any exports file"); 1800 exit(2); 1801 } 1802 1803 /* 1804 * If there was no public fh, clear any previous one set. 1805 */ 1806 if (run_v4server > 0 && has_publicfh == 0) 1807 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1808 1809 /* Resume the nfsd. If they weren't suspended, this is harmless. */ 1810 (void)nfssvc(NFSSVC_RESUMENFSD, NULL); 1811 } 1812 1813 /* 1814 * Allocate an export list element 1815 */ 1816 struct exportlist * 1817 get_exp(void) 1818 { 1819 struct exportlist *ep; 1820 1821 ep = (struct exportlist *)calloc(1, sizeof (struct exportlist)); 1822 if (ep == (struct exportlist *)NULL) 1823 out_of_mem(); 1824 return (ep); 1825 } 1826 1827 /* 1828 * Allocate a group list element 1829 */ 1830 struct grouplist * 1831 get_grp(void) 1832 { 1833 struct grouplist *gp; 1834 1835 gp = (struct grouplist *)calloc(1, sizeof (struct grouplist)); 1836 if (gp == (struct grouplist *)NULL) 1837 out_of_mem(); 1838 return (gp); 1839 } 1840 1841 /* 1842 * Clean up upon an error in get_exportlist(). 1843 */ 1844 void 1845 getexp_err(struct exportlist *ep, struct grouplist *grp) 1846 { 1847 struct grouplist *tgrp; 1848 1849 if (!(opt_flags & OP_QUIET)) 1850 syslog(LOG_ERR, "bad exports list line %s", line); 1851 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1852 free_exp(ep); 1853 while (grp) { 1854 tgrp = grp; 1855 grp = grp->gr_next; 1856 free_grp(tgrp); 1857 } 1858 } 1859 1860 /* 1861 * Search the export list for a matching fs. 1862 */ 1863 struct exportlist * 1864 ex_search(fsid_t *fsid) 1865 { 1866 struct exportlist *ep; 1867 1868 ep = exphead; 1869 while (ep) { 1870 if (ep->ex_fs.val[0] == fsid->val[0] && 1871 ep->ex_fs.val[1] == fsid->val[1]) 1872 return (ep); 1873 ep = ep->ex_next; 1874 } 1875 return (ep); 1876 } 1877 1878 /* 1879 * Add a directory path to the list. 1880 */ 1881 char * 1882 add_expdir(struct dirlist **dpp, char *cp, int len) 1883 { 1884 struct dirlist *dp; 1885 1886 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1887 if (dp == (struct dirlist *)NULL) 1888 out_of_mem(); 1889 dp->dp_left = *dpp; 1890 dp->dp_right = (struct dirlist *)NULL; 1891 dp->dp_flag = 0; 1892 dp->dp_hosts = (struct hostlist *)NULL; 1893 strcpy(dp->dp_dirp, cp); 1894 *dpp = dp; 1895 return (dp->dp_dirp); 1896 } 1897 1898 /* 1899 * Hang the dir list element off the dirpath binary tree as required 1900 * and update the entry for host. 1901 */ 1902 void 1903 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 1904 int flags) 1905 { 1906 struct hostlist *hp; 1907 struct dirlist *dp2; 1908 1909 if (flags & OP_ALLDIRS) { 1910 if (ep->ex_defdir) 1911 free((caddr_t)dp); 1912 else 1913 ep->ex_defdir = dp; 1914 if (grp == (struct grouplist *)NULL) { 1915 ep->ex_defdir->dp_flag |= DP_DEFSET; 1916 /* Save the default security flavors list. */ 1917 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 1918 if (ep->ex_numsecflavors > 0) 1919 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 1920 sizeof(ep->ex_secflavors)); 1921 } else while (grp) { 1922 hp = get_ht(); 1923 hp->ht_grp = grp; 1924 hp->ht_next = ep->ex_defdir->dp_hosts; 1925 ep->ex_defdir->dp_hosts = hp; 1926 /* Save the security flavors list for this host set. */ 1927 grp->gr_numsecflavors = ep->ex_numsecflavors; 1928 if (ep->ex_numsecflavors > 0) 1929 memcpy(grp->gr_secflavors, ep->ex_secflavors, 1930 sizeof(ep->ex_secflavors)); 1931 grp = grp->gr_next; 1932 } 1933 } else { 1934 1935 /* 1936 * Loop through the directories adding them to the tree. 1937 */ 1938 while (dp) { 1939 dp2 = dp->dp_left; 1940 add_dlist(&ep->ex_dirl, dp, grp, flags, ep); 1941 dp = dp2; 1942 } 1943 } 1944 } 1945 1946 /* 1947 * Traverse the binary tree either updating a node that is already there 1948 * for the new directory or adding the new node. 1949 */ 1950 void 1951 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 1952 int flags, struct exportlist *ep) 1953 { 1954 struct dirlist *dp; 1955 struct hostlist *hp; 1956 int cmp; 1957 1958 dp = *dpp; 1959 if (dp) { 1960 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1961 if (cmp > 0) { 1962 add_dlist(&dp->dp_left, newdp, grp, flags, ep); 1963 return; 1964 } else if (cmp < 0) { 1965 add_dlist(&dp->dp_right, newdp, grp, flags, ep); 1966 return; 1967 } else 1968 free((caddr_t)newdp); 1969 } else { 1970 dp = newdp; 1971 dp->dp_left = (struct dirlist *)NULL; 1972 *dpp = dp; 1973 } 1974 if (grp) { 1975 1976 /* 1977 * Hang all of the host(s) off of the directory point. 1978 */ 1979 do { 1980 hp = get_ht(); 1981 hp->ht_grp = grp; 1982 hp->ht_next = dp->dp_hosts; 1983 dp->dp_hosts = hp; 1984 /* Save the security flavors list for this host set. */ 1985 grp->gr_numsecflavors = ep->ex_numsecflavors; 1986 if (ep->ex_numsecflavors > 0) 1987 memcpy(grp->gr_secflavors, ep->ex_secflavors, 1988 sizeof(ep->ex_secflavors)); 1989 grp = grp->gr_next; 1990 } while (grp); 1991 } else { 1992 dp->dp_flag |= DP_DEFSET; 1993 /* Save the default security flavors list. */ 1994 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 1995 if (ep->ex_numsecflavors > 0) 1996 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 1997 sizeof(ep->ex_secflavors)); 1998 } 1999 } 2000 2001 /* 2002 * Search for a dirpath on the export point. 2003 */ 2004 struct dirlist * 2005 dirp_search(struct dirlist *dp, char *dirp) 2006 { 2007 int cmp; 2008 2009 if (dp) { 2010 cmp = strcmp(dp->dp_dirp, dirp); 2011 if (cmp > 0) 2012 return (dirp_search(dp->dp_left, dirp)); 2013 else if (cmp < 0) 2014 return (dirp_search(dp->dp_right, dirp)); 2015 else 2016 return (dp); 2017 } 2018 return (dp); 2019 } 2020 2021 /* 2022 * Scan for a host match in a directory tree. 2023 */ 2024 int 2025 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 2026 int *hostsetp, int *numsecflavors, int **secflavorsp) 2027 { 2028 struct hostlist *hp; 2029 struct grouplist *grp; 2030 struct addrinfo *ai; 2031 2032 if (dp) { 2033 if (dp->dp_flag & DP_DEFSET) 2034 *defsetp = dp->dp_flag; 2035 hp = dp->dp_hosts; 2036 while (hp) { 2037 grp = hp->ht_grp; 2038 switch (grp->gr_type) { 2039 case GT_HOST: 2040 ai = grp->gr_ptr.gt_addrinfo; 2041 for (; ai; ai = ai->ai_next) { 2042 if (!sacmp(ai->ai_addr, saddr, NULL)) { 2043 *hostsetp = 2044 (hp->ht_flag | DP_HOSTSET); 2045 if (numsecflavors != NULL) { 2046 *numsecflavors = 2047 grp->gr_numsecflavors; 2048 *secflavorsp = 2049 grp->gr_secflavors; 2050 } 2051 return (1); 2052 } 2053 } 2054 break; 2055 case GT_NET: 2056 if (!sacmp(saddr, (struct sockaddr *) 2057 &grp->gr_ptr.gt_net.nt_net, 2058 (struct sockaddr *) 2059 &grp->gr_ptr.gt_net.nt_mask)) { 2060 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2061 if (numsecflavors != NULL) { 2062 *numsecflavors = 2063 grp->gr_numsecflavors; 2064 *secflavorsp = 2065 grp->gr_secflavors; 2066 } 2067 return (1); 2068 } 2069 break; 2070 } 2071 hp = hp->ht_next; 2072 } 2073 } 2074 return (0); 2075 } 2076 2077 /* 2078 * Scan tree for a host that matches the address. 2079 */ 2080 int 2081 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2082 { 2083 int defset, hostset; 2084 2085 if (dp) { 2086 if (scan_tree(dp->dp_left, saddr)) 2087 return (1); 2088 if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL)) 2089 return (1); 2090 if (scan_tree(dp->dp_right, saddr)) 2091 return (1); 2092 } 2093 return (0); 2094 } 2095 2096 /* 2097 * Traverse the dirlist tree and free it up. 2098 */ 2099 void 2100 free_dir(struct dirlist *dp) 2101 { 2102 2103 if (dp) { 2104 free_dir(dp->dp_left); 2105 free_dir(dp->dp_right); 2106 free_host(dp->dp_hosts); 2107 free((caddr_t)dp); 2108 } 2109 } 2110 2111 /* 2112 * Parse a colon separated list of security flavors 2113 */ 2114 int 2115 parsesec(char *seclist, struct exportlist *ep) 2116 { 2117 char *cp, savedc; 2118 int flavor; 2119 2120 ep->ex_numsecflavors = 0; 2121 for (;;) { 2122 cp = strchr(seclist, ':'); 2123 if (cp) { 2124 savedc = *cp; 2125 *cp = '\0'; 2126 } 2127 2128 if (!strcmp(seclist, "sys")) 2129 flavor = AUTH_SYS; 2130 else if (!strcmp(seclist, "krb5")) 2131 flavor = RPCSEC_GSS_KRB5; 2132 else if (!strcmp(seclist, "krb5i")) 2133 flavor = RPCSEC_GSS_KRB5I; 2134 else if (!strcmp(seclist, "krb5p")) 2135 flavor = RPCSEC_GSS_KRB5P; 2136 else { 2137 if (cp) 2138 *cp = savedc; 2139 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2140 return (1); 2141 } 2142 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2143 if (cp) 2144 *cp = savedc; 2145 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2146 return (1); 2147 } 2148 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2149 ep->ex_numsecflavors++; 2150 if (cp) { 2151 *cp = savedc; 2152 seclist = cp + 1; 2153 } else { 2154 break; 2155 } 2156 } 2157 return (0); 2158 } 2159 2160 /* 2161 * Parse the option string and update fields. 2162 * Option arguments may either be -<option>=<value> or 2163 * -<option> <value> 2164 */ 2165 int 2166 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2167 int *has_hostp, int *exflagsp, struct xucred *cr) 2168 { 2169 char *cpoptarg, *cpoptend; 2170 char *cp, *endcp, *cpopt, savedc, savedc2; 2171 int allflag, usedarg; 2172 2173 savedc2 = '\0'; 2174 cpopt = *cpp; 2175 cpopt++; 2176 cp = *endcpp; 2177 savedc = *cp; 2178 *cp = '\0'; 2179 while (cpopt && *cpopt) { 2180 allflag = 1; 2181 usedarg = -2; 2182 if ((cpoptend = strchr(cpopt, ','))) { 2183 *cpoptend++ = '\0'; 2184 if ((cpoptarg = strchr(cpopt, '='))) 2185 *cpoptarg++ = '\0'; 2186 } else { 2187 if ((cpoptarg = strchr(cpopt, '='))) 2188 *cpoptarg++ = '\0'; 2189 else { 2190 *cp = savedc; 2191 nextfield(&cp, &endcp); 2192 **endcpp = '\0'; 2193 if (endcp > cp && *cp != '-') { 2194 cpoptarg = cp; 2195 savedc2 = *endcp; 2196 *endcp = '\0'; 2197 usedarg = 0; 2198 } 2199 } 2200 } 2201 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2202 *exflagsp |= MNT_EXRDONLY; 2203 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2204 !(allflag = strcmp(cpopt, "mapall")) || 2205 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2206 usedarg++; 2207 parsecred(cpoptarg, cr); 2208 if (allflag == 0) { 2209 *exflagsp |= MNT_EXPORTANON; 2210 opt_flags |= OP_MAPALL; 2211 } else 2212 opt_flags |= OP_MAPROOT; 2213 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2214 !strcmp(cpopt, "m"))) { 2215 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2216 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2217 return (1); 2218 } 2219 usedarg++; 2220 opt_flags |= OP_MASK; 2221 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2222 !strcmp(cpopt, "n"))) { 2223 if (strchr(cpoptarg, '/') != NULL) { 2224 if (debug) 2225 fprintf(stderr, "setting OP_MASKLEN\n"); 2226 opt_flags |= OP_MASKLEN; 2227 } 2228 if (grp->gr_type != GT_NULL) { 2229 syslog(LOG_ERR, "network/host conflict"); 2230 return (1); 2231 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2232 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2233 return (1); 2234 } 2235 grp->gr_type = GT_NET; 2236 *has_hostp = 1; 2237 usedarg++; 2238 opt_flags |= OP_NET; 2239 } else if (!strcmp(cpopt, "alldirs")) { 2240 opt_flags |= OP_ALLDIRS; 2241 } else if (!strcmp(cpopt, "public")) { 2242 *exflagsp |= MNT_EXPUBLIC; 2243 } else if (!strcmp(cpopt, "webnfs")) { 2244 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2245 opt_flags |= OP_MAPALL; 2246 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2247 ep->ex_indexfile = strdup(cpoptarg); 2248 } else if (!strcmp(cpopt, "quiet")) { 2249 opt_flags |= OP_QUIET; 2250 } else if (cpoptarg && !strcmp(cpopt, "sec")) { 2251 if (parsesec(cpoptarg, ep)) 2252 return (1); 2253 opt_flags |= OP_SEC; 2254 usedarg++; 2255 } else { 2256 syslog(LOG_ERR, "bad opt %s", cpopt); 2257 return (1); 2258 } 2259 if (usedarg >= 0) { 2260 *endcp = savedc2; 2261 **endcpp = savedc; 2262 if (usedarg > 0) { 2263 *cpp = cp; 2264 *endcpp = endcp; 2265 } 2266 return (0); 2267 } 2268 cpopt = cpoptend; 2269 } 2270 **endcpp = savedc; 2271 return (0); 2272 } 2273 2274 /* 2275 * Translate a character string to the corresponding list of network 2276 * addresses for a hostname. 2277 */ 2278 int 2279 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 2280 { 2281 struct grouplist *checkgrp; 2282 struct addrinfo *ai, *tai, hints; 2283 int ecode; 2284 char host[NI_MAXHOST]; 2285 2286 if (grp->gr_type != GT_NULL) { 2287 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2288 return (1); 2289 } 2290 memset(&hints, 0, sizeof hints); 2291 hints.ai_flags = AI_CANONNAME; 2292 hints.ai_protocol = IPPROTO_UDP; 2293 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2294 if (ecode != 0) { 2295 syslog(LOG_ERR,"can't get address info for host %s", cp); 2296 return 1; 2297 } 2298 grp->gr_ptr.gt_addrinfo = ai; 2299 while (ai != NULL) { 2300 if (ai->ai_canonname == NULL) { 2301 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2302 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2303 strlcpy(host, "?", sizeof(host)); 2304 ai->ai_canonname = strdup(host); 2305 ai->ai_flags |= AI_CANONNAME; 2306 } 2307 if (debug) 2308 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2309 /* 2310 * Sanity check: make sure we don't already have an entry 2311 * for this host in the grouplist. 2312 */ 2313 for (checkgrp = tgrp; checkgrp != NULL; 2314 checkgrp = checkgrp->gr_next) { 2315 if (checkgrp->gr_type != GT_HOST) 2316 continue; 2317 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2318 tai = tai->ai_next) { 2319 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2320 continue; 2321 if (debug) 2322 fprintf(stderr, 2323 "ignoring duplicate host %s\n", 2324 ai->ai_canonname); 2325 grp->gr_type = GT_IGNORE; 2326 return (0); 2327 } 2328 } 2329 ai = ai->ai_next; 2330 } 2331 grp->gr_type = GT_HOST; 2332 return (0); 2333 } 2334 2335 /* 2336 * Free up an exports list component 2337 */ 2338 void 2339 free_exp(struct exportlist *ep) 2340 { 2341 2342 if (ep->ex_defdir) { 2343 free_host(ep->ex_defdir->dp_hosts); 2344 free((caddr_t)ep->ex_defdir); 2345 } 2346 if (ep->ex_fsdir) 2347 free(ep->ex_fsdir); 2348 if (ep->ex_indexfile) 2349 free(ep->ex_indexfile); 2350 free_dir(ep->ex_dirl); 2351 free((caddr_t)ep); 2352 } 2353 2354 /* 2355 * Free hosts. 2356 */ 2357 void 2358 free_host(struct hostlist *hp) 2359 { 2360 struct hostlist *hp2; 2361 2362 while (hp) { 2363 hp2 = hp; 2364 hp = hp->ht_next; 2365 free((caddr_t)hp2); 2366 } 2367 } 2368 2369 struct hostlist * 2370 get_ht(void) 2371 { 2372 struct hostlist *hp; 2373 2374 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2375 if (hp == (struct hostlist *)NULL) 2376 out_of_mem(); 2377 hp->ht_next = (struct hostlist *)NULL; 2378 hp->ht_flag = 0; 2379 return (hp); 2380 } 2381 2382 /* 2383 * Out of memory, fatal 2384 */ 2385 void 2386 out_of_mem(void) 2387 { 2388 2389 syslog(LOG_ERR, "out of memory"); 2390 exit(2); 2391 } 2392 2393 /* 2394 * Do the nmount() syscall with the update flag to push the export info into 2395 * the kernel. 2396 */ 2397 int 2398 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2399 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 2400 { 2401 struct statfs fsb1; 2402 struct addrinfo *ai; 2403 struct export_args ea, *eap; 2404 char errmsg[255]; 2405 char *cp; 2406 int done; 2407 char savedc; 2408 struct iovec *iov; 2409 int i, iovlen; 2410 int ret; 2411 struct nfsex_args nfsea; 2412 2413 if (run_v4server > 0) 2414 eap = &nfsea.export; 2415 else 2416 eap = &ea; 2417 2418 cp = NULL; 2419 savedc = '\0'; 2420 iov = NULL; 2421 iovlen = 0; 2422 ret = 0; 2423 2424 bzero(eap, sizeof (struct export_args)); 2425 bzero(errmsg, sizeof(errmsg)); 2426 eap->ex_flags = exflags; 2427 eap->ex_anon = *anoncrp; 2428 eap->ex_indexfile = ep->ex_indexfile; 2429 if (grp->gr_type == GT_HOST) 2430 ai = grp->gr_ptr.gt_addrinfo; 2431 else 2432 ai = NULL; 2433 eap->ex_numsecflavors = ep->ex_numsecflavors; 2434 for (i = 0; i < eap->ex_numsecflavors; i++) 2435 eap->ex_secflavors[i] = ep->ex_secflavors[i]; 2436 if (eap->ex_numsecflavors == 0) { 2437 eap->ex_numsecflavors = 1; 2438 eap->ex_secflavors[0] = AUTH_SYS; 2439 } 2440 done = FALSE; 2441 2442 if (v4root_phase == 0) { 2443 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2444 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2445 build_iovec(&iov, &iovlen, "from", NULL, 0); 2446 build_iovec(&iov, &iovlen, "update", NULL, 0); 2447 build_iovec(&iov, &iovlen, "export", eap, 2448 sizeof (struct export_args)); 2449 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 2450 } 2451 2452 while (!done) { 2453 switch (grp->gr_type) { 2454 case GT_HOST: 2455 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 2456 goto skip; 2457 eap->ex_addr = ai->ai_addr; 2458 eap->ex_addrlen = ai->ai_addrlen; 2459 eap->ex_masklen = 0; 2460 break; 2461 case GT_NET: 2462 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 2463 have_v6 == 0) 2464 goto skip; 2465 eap->ex_addr = 2466 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 2467 eap->ex_addrlen = 2468 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 2469 eap->ex_mask = 2470 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 2471 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 2472 break; 2473 case GT_DEFAULT: 2474 eap->ex_addr = NULL; 2475 eap->ex_addrlen = 0; 2476 eap->ex_mask = NULL; 2477 eap->ex_masklen = 0; 2478 break; 2479 case GT_IGNORE: 2480 ret = 0; 2481 goto error_exit; 2482 break; 2483 default: 2484 syslog(LOG_ERR, "bad grouptype"); 2485 if (cp) 2486 *cp = savedc; 2487 ret = 1; 2488 goto error_exit; 2489 }; 2490 2491 /* 2492 * For V4:, use the nfssvc() syscall, instead of mount(). 2493 */ 2494 if (v4root_phase == 2) { 2495 nfsea.fspec = v4root_dirpath; 2496 if (run_v4server > 0 && 2497 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 2498 syslog(LOG_ERR, "Exporting V4: failed"); 2499 return (2); 2500 } 2501 } else { 2502 /* 2503 * XXX: 2504 * Maybe I should just use the fsb->f_mntonname path 2505 * instead of looping back up the dirp to the mount 2506 * point?? 2507 * Also, needs to know how to export all types of local 2508 * exportable filesystems and not just "ufs". 2509 */ 2510 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 2511 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 2512 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 2513 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 2514 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 2515 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 2516 errmsg[0] = '\0'; 2517 2518 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 2519 if (cp) 2520 *cp-- = savedc; 2521 else 2522 cp = dirp + dirplen - 1; 2523 if (opt_flags & OP_QUIET) { 2524 ret = 1; 2525 goto error_exit; 2526 } 2527 if (errno == EPERM) { 2528 if (debug) 2529 warnx("can't change attributes for %s: %s", 2530 dirp, errmsg); 2531 syslog(LOG_ERR, 2532 "can't change attributes for %s: %s", 2533 dirp, errmsg); 2534 ret = 1; 2535 goto error_exit; 2536 } 2537 if (opt_flags & OP_ALLDIRS) { 2538 if (errno == EINVAL) 2539 syslog(LOG_ERR, 2540 "-alldirs requested but %s is not a filesystem mountpoint", 2541 dirp); 2542 else 2543 syslog(LOG_ERR, 2544 "could not remount %s: %m", 2545 dirp); 2546 ret = 1; 2547 goto error_exit; 2548 } 2549 /* back up over the last component */ 2550 while (*cp == '/' && cp > dirp) 2551 cp--; 2552 while (*(cp - 1) != '/' && cp > dirp) 2553 cp--; 2554 if (cp == dirp) { 2555 if (debug) 2556 warnx("mnt unsucc"); 2557 syslog(LOG_ERR, "can't export %s %s", 2558 dirp, errmsg); 2559 ret = 1; 2560 goto error_exit; 2561 } 2562 savedc = *cp; 2563 *cp = '\0'; 2564 /* 2565 * Check that we're still on the same 2566 * filesystem. 2567 */ 2568 if (statfs(dirp, &fsb1) != 0 || 2569 bcmp(&fsb1.f_fsid, &fsb->f_fsid, 2570 sizeof (fsb1.f_fsid)) != 0) { 2571 *cp = savedc; 2572 syslog(LOG_ERR, 2573 "can't export %s %s", dirp, 2574 errmsg); 2575 ret = 1; 2576 goto error_exit; 2577 } 2578 } 2579 } 2580 2581 /* 2582 * For the experimental server: 2583 * If this is the public directory, get the file handle 2584 * and load it into the kernel via the nfssvc() syscall. 2585 */ 2586 if (run_v4server > 0 && (exflags & MNT_EXPUBLIC) != 0) { 2587 fhandle_t fh; 2588 char *public_name; 2589 2590 if (eap->ex_indexfile != NULL) 2591 public_name = eap->ex_indexfile; 2592 else 2593 public_name = dirp; 2594 if (getfh(public_name, &fh) < 0) 2595 syslog(LOG_ERR, 2596 "Can't get public fh for %s", public_name); 2597 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 2598 syslog(LOG_ERR, 2599 "Can't set public fh for %s", public_name); 2600 else 2601 has_publicfh = 1; 2602 } 2603 skip: 2604 if (ai != NULL) 2605 ai = ai->ai_next; 2606 if (ai == NULL) 2607 done = TRUE; 2608 } 2609 if (cp) 2610 *cp = savedc; 2611 error_exit: 2612 /* free strings allocated by strdup() in getmntopts.c */ 2613 if (iov != NULL) { 2614 free(iov[0].iov_base); /* fstype */ 2615 free(iov[2].iov_base); /* fspath */ 2616 free(iov[4].iov_base); /* from */ 2617 free(iov[6].iov_base); /* update */ 2618 free(iov[8].iov_base); /* export */ 2619 free(iov[10].iov_base); /* errmsg */ 2620 2621 /* free iov, allocated by realloc() */ 2622 free(iov); 2623 } 2624 return (ret); 2625 } 2626 2627 /* 2628 * Translate a net address. 2629 * 2630 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2631 */ 2632 int 2633 get_net(char *cp, struct netmsk *net, int maskflg) 2634 { 2635 struct netent *np = NULL; 2636 char *name, *p, *prefp; 2637 struct sockaddr_in sin; 2638 struct sockaddr *sa = NULL; 2639 struct addrinfo hints, *ai = NULL; 2640 char netname[NI_MAXHOST]; 2641 long preflen; 2642 2643 p = prefp = NULL; 2644 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2645 p = strchr(cp, '/'); 2646 *p = '\0'; 2647 prefp = p + 1; 2648 } 2649 2650 /* 2651 * Check for a numeric address first. We wish to avoid 2652 * possible DNS lookups in getnetbyname(). 2653 */ 2654 if (isxdigit(*cp) || *cp == ':') { 2655 memset(&hints, 0, sizeof hints); 2656 /* Ensure the mask and the network have the same family. */ 2657 if (maskflg && (opt_flags & OP_NET)) 2658 hints.ai_family = net->nt_net.ss_family; 2659 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2660 hints.ai_family = net->nt_mask.ss_family; 2661 else 2662 hints.ai_family = AF_UNSPEC; 2663 hints.ai_flags = AI_NUMERICHOST; 2664 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2665 sa = ai->ai_addr; 2666 if (sa != NULL && ai->ai_family == AF_INET) { 2667 /* 2668 * The address in `cp' is really a network address, so 2669 * use inet_network() to re-interpret this correctly. 2670 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2671 */ 2672 bzero(&sin, sizeof sin); 2673 sin.sin_family = AF_INET; 2674 sin.sin_len = sizeof sin; 2675 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2676 if (debug) 2677 fprintf(stderr, "get_net: v4 addr %s\n", 2678 inet_ntoa(sin.sin_addr)); 2679 sa = (struct sockaddr *)&sin; 2680 } 2681 } 2682 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2683 bzero(&sin, sizeof sin); 2684 sin.sin_family = AF_INET; 2685 sin.sin_len = sizeof sin; 2686 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2687 sa = (struct sockaddr *)&sin; 2688 } 2689 if (sa == NULL) 2690 goto fail; 2691 2692 if (maskflg) { 2693 /* The specified sockaddr is a mask. */ 2694 if (checkmask(sa) != 0) 2695 goto fail; 2696 bcopy(sa, &net->nt_mask, sa->sa_len); 2697 opt_flags |= OP_HAVEMASK; 2698 } else { 2699 /* The specified sockaddr is a network address. */ 2700 bcopy(sa, &net->nt_net, sa->sa_len); 2701 2702 /* Get a network name for the export list. */ 2703 if (np) { 2704 name = np->n_name; 2705 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2706 NULL, 0, NI_NUMERICHOST) == 0) { 2707 name = netname; 2708 } else { 2709 goto fail; 2710 } 2711 if ((net->nt_name = strdup(name)) == NULL) 2712 out_of_mem(); 2713 2714 /* 2715 * Extract a mask from either a "/<masklen>" suffix, or 2716 * from the class of an IPv4 address. 2717 */ 2718 if (opt_flags & OP_MASKLEN) { 2719 preflen = strtol(prefp, NULL, 10); 2720 if (preflen < 0L || preflen == LONG_MAX) 2721 goto fail; 2722 bcopy(sa, &net->nt_mask, sa->sa_len); 2723 if (makemask(&net->nt_mask, (int)preflen) != 0) 2724 goto fail; 2725 opt_flags |= OP_HAVEMASK; 2726 *p = '/'; 2727 } else if (sa->sa_family == AF_INET && 2728 (opt_flags & OP_MASK) == 0) { 2729 in_addr_t addr; 2730 2731 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2732 if (IN_CLASSA(addr)) 2733 preflen = 8; 2734 else if (IN_CLASSB(addr)) 2735 preflen = 16; 2736 else if (IN_CLASSC(addr)) 2737 preflen = 24; 2738 else if (IN_CLASSD(addr)) 2739 preflen = 28; 2740 else 2741 preflen = 32; /* XXX */ 2742 2743 bcopy(sa, &net->nt_mask, sa->sa_len); 2744 makemask(&net->nt_mask, (int)preflen); 2745 opt_flags |= OP_HAVEMASK; 2746 } 2747 } 2748 2749 if (ai) 2750 freeaddrinfo(ai); 2751 return 0; 2752 2753 fail: 2754 if (ai) 2755 freeaddrinfo(ai); 2756 return 1; 2757 } 2758 2759 /* 2760 * Parse out the next white space separated field 2761 */ 2762 void 2763 nextfield(char **cp, char **endcp) 2764 { 2765 char *p; 2766 2767 p = *cp; 2768 while (*p == ' ' || *p == '\t') 2769 p++; 2770 if (*p == '\n' || *p == '\0') 2771 *cp = *endcp = p; 2772 else { 2773 *cp = p++; 2774 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2775 p++; 2776 *endcp = p; 2777 } 2778 } 2779 2780 /* 2781 * Get an exports file line. Skip over blank lines and handle line 2782 * continuations. 2783 */ 2784 int 2785 get_line(void) 2786 { 2787 char *p, *cp; 2788 size_t len; 2789 int totlen, cont_line; 2790 2791 /* 2792 * Loop around ignoring blank lines and getting all continuation lines. 2793 */ 2794 p = line; 2795 totlen = 0; 2796 do { 2797 if ((p = fgetln(exp_file, &len)) == NULL) 2798 return (0); 2799 cp = p + len - 1; 2800 cont_line = 0; 2801 while (cp >= p && 2802 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2803 if (*cp == '\\') 2804 cont_line = 1; 2805 cp--; 2806 len--; 2807 } 2808 if (cont_line) { 2809 *++cp = ' '; 2810 len++; 2811 } 2812 if (linesize < len + totlen + 1) { 2813 linesize = len + totlen + 1; 2814 line = realloc(line, linesize); 2815 if (line == NULL) 2816 out_of_mem(); 2817 } 2818 memcpy(line + totlen, p, len); 2819 totlen += len; 2820 line[totlen] = '\0'; 2821 } while (totlen == 0 || cont_line); 2822 return (1); 2823 } 2824 2825 /* 2826 * Parse a description of a credential. 2827 */ 2828 void 2829 parsecred(char *namelist, struct xucred *cr) 2830 { 2831 char *name; 2832 int cnt; 2833 char *names; 2834 struct passwd *pw; 2835 struct group *gr; 2836 gid_t groups[XU_NGROUPS + 1]; 2837 int ngroups; 2838 2839 cr->cr_version = XUCRED_VERSION; 2840 /* 2841 * Set up the unprivileged user. 2842 */ 2843 cr->cr_uid = -2; 2844 cr->cr_groups[0] = -2; 2845 cr->cr_ngroups = 1; 2846 /* 2847 * Get the user's password table entry. 2848 */ 2849 names = strsep(&namelist, " \t\n"); 2850 name = strsep(&names, ":"); 2851 if (isdigit(*name) || *name == '-') 2852 pw = getpwuid(atoi(name)); 2853 else 2854 pw = getpwnam(name); 2855 /* 2856 * Credentials specified as those of a user. 2857 */ 2858 if (names == NULL) { 2859 if (pw == NULL) { 2860 syslog(LOG_ERR, "unknown user: %s", name); 2861 return; 2862 } 2863 cr->cr_uid = pw->pw_uid; 2864 ngroups = XU_NGROUPS + 1; 2865 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2866 syslog(LOG_ERR, "too many groups"); 2867 /* 2868 * Compress out duplicate. 2869 */ 2870 cr->cr_ngroups = ngroups - 1; 2871 cr->cr_groups[0] = groups[0]; 2872 for (cnt = 2; cnt < ngroups; cnt++) 2873 cr->cr_groups[cnt - 1] = groups[cnt]; 2874 return; 2875 } 2876 /* 2877 * Explicit credential specified as a colon separated list: 2878 * uid:gid:gid:... 2879 */ 2880 if (pw != NULL) 2881 cr->cr_uid = pw->pw_uid; 2882 else if (isdigit(*name) || *name == '-') 2883 cr->cr_uid = atoi(name); 2884 else { 2885 syslog(LOG_ERR, "unknown user: %s", name); 2886 return; 2887 } 2888 cr->cr_ngroups = 0; 2889 while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) { 2890 name = strsep(&names, ":"); 2891 if (isdigit(*name) || *name == '-') { 2892 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2893 } else { 2894 if ((gr = getgrnam(name)) == NULL) { 2895 syslog(LOG_ERR, "unknown group: %s", name); 2896 continue; 2897 } 2898 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2899 } 2900 } 2901 if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS) 2902 syslog(LOG_ERR, "too many groups"); 2903 } 2904 2905 #define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 2906 /* 2907 * Routines that maintain the remote mounttab 2908 */ 2909 void 2910 get_mountlist(void) 2911 { 2912 struct mountlist *mlp, **mlpp; 2913 char *host, *dirp, *cp; 2914 char str[STRSIZ]; 2915 FILE *mlfile; 2916 2917 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2918 if (errno == ENOENT) 2919 return; 2920 else { 2921 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 2922 return; 2923 } 2924 } 2925 mlpp = &mlhead; 2926 while (fgets(str, STRSIZ, mlfile) != NULL) { 2927 cp = str; 2928 host = strsep(&cp, " \t\n"); 2929 dirp = strsep(&cp, " \t\n"); 2930 if (host == NULL || dirp == NULL) 2931 continue; 2932 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2933 if (mlp == (struct mountlist *)NULL) 2934 out_of_mem(); 2935 strncpy(mlp->ml_host, host, MNTNAMLEN); 2936 mlp->ml_host[MNTNAMLEN] = '\0'; 2937 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 2938 mlp->ml_dirp[MNTPATHLEN] = '\0'; 2939 mlp->ml_next = (struct mountlist *)NULL; 2940 *mlpp = mlp; 2941 mlpp = &mlp->ml_next; 2942 } 2943 fclose(mlfile); 2944 } 2945 2946 void 2947 del_mlist(char *hostp, char *dirp) 2948 { 2949 struct mountlist *mlp, **mlpp; 2950 struct mountlist *mlp2; 2951 FILE *mlfile; 2952 int fnd = 0; 2953 2954 mlpp = &mlhead; 2955 mlp = mlhead; 2956 while (mlp) { 2957 if (!strcmp(mlp->ml_host, hostp) && 2958 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2959 fnd = 1; 2960 mlp2 = mlp; 2961 *mlpp = mlp = mlp->ml_next; 2962 free((caddr_t)mlp2); 2963 } else { 2964 mlpp = &mlp->ml_next; 2965 mlp = mlp->ml_next; 2966 } 2967 } 2968 if (fnd) { 2969 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2970 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 2971 return; 2972 } 2973 mlp = mlhead; 2974 while (mlp) { 2975 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2976 mlp = mlp->ml_next; 2977 } 2978 fclose(mlfile); 2979 } 2980 } 2981 2982 void 2983 add_mlist(char *hostp, char *dirp) 2984 { 2985 struct mountlist *mlp, **mlpp; 2986 FILE *mlfile; 2987 2988 mlpp = &mlhead; 2989 mlp = mlhead; 2990 while (mlp) { 2991 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2992 return; 2993 mlpp = &mlp->ml_next; 2994 mlp = mlp->ml_next; 2995 } 2996 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2997 if (mlp == (struct mountlist *)NULL) 2998 out_of_mem(); 2999 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 3000 mlp->ml_host[MNTNAMLEN] = '\0'; 3001 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3002 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3003 mlp->ml_next = (struct mountlist *)NULL; 3004 *mlpp = mlp; 3005 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 3006 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 3007 return; 3008 } 3009 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3010 fclose(mlfile); 3011 } 3012 3013 /* 3014 * Free up a group list. 3015 */ 3016 void 3017 free_grp(struct grouplist *grp) 3018 { 3019 if (grp->gr_type == GT_HOST) { 3020 if (grp->gr_ptr.gt_addrinfo != NULL) 3021 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 3022 } else if (grp->gr_type == GT_NET) { 3023 if (grp->gr_ptr.gt_net.nt_name) 3024 free(grp->gr_ptr.gt_net.nt_name); 3025 } 3026 free((caddr_t)grp); 3027 } 3028 3029 #ifdef DEBUG 3030 void 3031 SYSLOG(int pri, const char *fmt, ...) 3032 { 3033 va_list ap; 3034 3035 va_start(ap, fmt); 3036 vfprintf(stderr, fmt, ap); 3037 va_end(ap); 3038 } 3039 #endif /* DEBUG */ 3040 3041 /* 3042 * Check options for consistency. 3043 */ 3044 int 3045 check_options(struct dirlist *dp) 3046 { 3047 3048 if (v4root_phase == 0 && dp == NULL) 3049 return (1); 3050 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 3051 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 3052 return (1); 3053 } 3054 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 3055 syslog(LOG_ERR, "-mask requires -network"); 3056 return (1); 3057 } 3058 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 3059 syslog(LOG_ERR, "-network requires mask specification"); 3060 return (1); 3061 } 3062 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3063 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3064 return (1); 3065 } 3066 if (v4root_phase > 0 && 3067 (opt_flags & 3068 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3069 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3070 return (1); 3071 } 3072 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3073 syslog(LOG_ERR, "-alldirs has multiple directories"); 3074 return (1); 3075 } 3076 return (0); 3077 } 3078 3079 /* 3080 * Check an absolute directory path for any symbolic links. Return true 3081 */ 3082 int 3083 check_dirpath(char *dirp) 3084 { 3085 char *cp; 3086 int ret = 1; 3087 struct stat sb; 3088 3089 cp = dirp + 1; 3090 while (*cp && ret) { 3091 if (*cp == '/') { 3092 *cp = '\0'; 3093 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3094 ret = 0; 3095 *cp = '/'; 3096 } 3097 cp++; 3098 } 3099 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3100 ret = 0; 3101 return (ret); 3102 } 3103 3104 /* 3105 * Make a netmask according to the specified prefix length. The ss_family 3106 * and other non-address fields must be initialised before calling this. 3107 */ 3108 int 3109 makemask(struct sockaddr_storage *ssp, int bitlen) 3110 { 3111 u_char *p; 3112 int bits, i, len; 3113 3114 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3115 return (-1); 3116 if (bitlen > len * CHAR_BIT) 3117 return (-1); 3118 3119 for (i = 0; i < len; i++) { 3120 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 3121 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3122 bitlen -= bits; 3123 } 3124 return 0; 3125 } 3126 3127 /* 3128 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 3129 * is acceptable (i.e. of the form 1...10....0). 3130 */ 3131 int 3132 checkmask(struct sockaddr *sa) 3133 { 3134 u_char *mask; 3135 int i, len; 3136 3137 if ((mask = sa_rawaddr(sa, &len)) == NULL) 3138 return (-1); 3139 3140 for (i = 0; i < len; i++) 3141 if (mask[i] != 0xff) 3142 break; 3143 if (i < len) { 3144 if (~mask[i] & (u_char)(~mask[i] + 1)) 3145 return (-1); 3146 i++; 3147 } 3148 for (; i < len; i++) 3149 if (mask[i] != 0) 3150 return (-1); 3151 return (0); 3152 } 3153 3154 /* 3155 * Compare two sockaddrs according to a specified mask. Return zero if 3156 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 3157 * If samask is NULL, perform a full comparison. 3158 */ 3159 int 3160 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 3161 { 3162 unsigned char *p1, *p2, *mask; 3163 int len, i; 3164 3165 if (sa1->sa_family != sa2->sa_family || 3166 (p1 = sa_rawaddr(sa1, &len)) == NULL || 3167 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 3168 return (1); 3169 3170 switch (sa1->sa_family) { 3171 case AF_INET6: 3172 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 3173 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 3174 return (1); 3175 break; 3176 } 3177 3178 /* Simple binary comparison if no mask specified. */ 3179 if (samask == NULL) 3180 return (memcmp(p1, p2, len)); 3181 3182 /* Set up the mask, and do a mask-based comparison. */ 3183 if (sa1->sa_family != samask->sa_family || 3184 (mask = sa_rawaddr(samask, NULL)) == NULL) 3185 return (1); 3186 3187 for (i = 0; i < len; i++) 3188 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3189 return (1); 3190 return (0); 3191 } 3192 3193 /* 3194 * Return a pointer to the part of the sockaddr that contains the 3195 * raw address, and set *nbytes to its length in bytes. Returns 3196 * NULL if the address family is unknown. 3197 */ 3198 void * 3199 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3200 void *p; 3201 int len; 3202 3203 switch (sa->sa_family) { 3204 case AF_INET: 3205 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3206 p = &((struct sockaddr_in *)sa)->sin_addr; 3207 break; 3208 case AF_INET6: 3209 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3210 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3211 break; 3212 default: 3213 p = NULL; 3214 len = 0; 3215 } 3216 3217 if (nbytes != NULL) 3218 *nbytes = len; 3219 return (p); 3220 } 3221 3222 void 3223 huphandler(int sig __unused) 3224 { 3225 got_sighup = 1; 3226 } 3227 3228 void terminate(int sig __unused) 3229 { 3230 pidfile_remove(pfh); 3231 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 3232 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 3233 exit (0); 3234 } 3235 3236