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