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 *dirp; 1646 char errmsg[255]; 1647 int dirplen, num, i; 1648 int iovlen; 1649 int done; 1650 struct nfsex_args eargs; 1651 1652 v4root_dirpath[0] = '\0'; 1653 bzero(&export, sizeof(export)); 1654 export.ex_flags = MNT_DELEXPORT; 1655 dirp = NULL; 1656 dirplen = 0; 1657 iov = NULL; 1658 iovlen = 0; 1659 bzero(errmsg, sizeof(errmsg)); 1660 1661 /* 1662 * First, get rid of the old list 1663 */ 1664 ep = exphead; 1665 while (ep) { 1666 ep2 = ep; 1667 ep = ep->ex_next; 1668 free_exp(ep2); 1669 } 1670 exphead = (struct exportlist *)NULL; 1671 1672 grp = grphead; 1673 while (grp) { 1674 tgrp = grp; 1675 grp = grp->gr_next; 1676 free_grp(tgrp); 1677 } 1678 grphead = (struct grouplist *)NULL; 1679 1680 /* 1681 * and the old V4 root dir. 1682 */ 1683 bzero(&eargs, sizeof (eargs)); 1684 eargs.export.ex_flags = MNT_DELEXPORT; 1685 if (run_v4server > 0 && 1686 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 && 1687 errno != ENOENT) 1688 syslog(LOG_ERR, "Can't delete exports for V4:"); 1689 1690 /* 1691 * and clear flag that notes if a public fh has been exported. 1692 */ 1693 has_publicfh = 0; 1694 1695 /* 1696 * And delete exports that are in the kernel for all local 1697 * filesystems. 1698 * XXX: Should know how to handle all local exportable filesystems. 1699 */ 1700 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1701 1702 if (num > 0) { 1703 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1704 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1705 build_iovec(&iov, &iovlen, "from", NULL, 0); 1706 build_iovec(&iov, &iovlen, "update", NULL, 0); 1707 build_iovec(&iov, &iovlen, "export", &export, sizeof(export)); 1708 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 1709 } 1710 1711 for (i = 0; i < num; i++) { 1712 fsp = &mntbufp[i]; 1713 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 1714 syslog(LOG_ERR, "getvfsbyname() failed for %s", 1715 fsp->f_fstypename); 1716 continue; 1717 } 1718 1719 /* 1720 * Do not delete export for network filesystem by 1721 * passing "export" arg to nmount(). 1722 * It only makes sense to do this for local filesystems. 1723 */ 1724 if (vfc.vfc_flags & VFCF_NETWORK) 1725 continue; 1726 1727 iov[1].iov_base = fsp->f_fstypename; 1728 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 1729 iov[3].iov_base = fsp->f_mntonname; 1730 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 1731 iov[5].iov_base = fsp->f_mntfromname; 1732 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 1733 1734 if (nmount(iov, iovlen, fsp->f_flags) < 0 && 1735 errno != ENOENT && errno != ENOTSUP) { 1736 syslog(LOG_ERR, 1737 "can't delete exports for %s: %m %s", 1738 fsp->f_mntonname, errmsg); 1739 } 1740 } 1741 1742 if (iov != NULL) { 1743 /* Free strings allocated by strdup() in getmntopts.c */ 1744 free(iov[0].iov_base); /* fstype */ 1745 free(iov[2].iov_base); /* fspath */ 1746 free(iov[4].iov_base); /* from */ 1747 free(iov[6].iov_base); /* update */ 1748 free(iov[8].iov_base); /* export */ 1749 free(iov[10].iov_base); /* errmsg */ 1750 1751 /* free iov, allocated by realloc() */ 1752 free(iov); 1753 iovlen = 0; 1754 } 1755 1756 /* 1757 * Read in the exports file and build the list, calling 1758 * nmount() as we go along to push the export rules into the kernel. 1759 */ 1760 done = 0; 1761 for (i = 0; exnames[i] != NULL; i++) { 1762 if (debug) 1763 warnx("reading exports from %s", exnames[i]); 1764 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1765 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1766 continue; 1767 } 1768 get_exportlist_one(); 1769 fclose(exp_file); 1770 done++; 1771 } 1772 if (done == 0) { 1773 syslog(LOG_ERR, "can't open any exports file"); 1774 exit(2); 1775 } 1776 1777 /* 1778 * If there was no public fh, clear any previous one set. 1779 */ 1780 if (run_v4server > 0 && has_publicfh == 0) 1781 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1782 } 1783 1784 /* 1785 * Allocate an export list element 1786 */ 1787 struct exportlist * 1788 get_exp(void) 1789 { 1790 struct exportlist *ep; 1791 1792 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1793 if (ep == (struct exportlist *)NULL) 1794 out_of_mem(); 1795 memset(ep, 0, sizeof(struct exportlist)); 1796 return (ep); 1797 } 1798 1799 /* 1800 * Allocate a group list element 1801 */ 1802 struct grouplist * 1803 get_grp(void) 1804 { 1805 struct grouplist *gp; 1806 1807 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1808 if (gp == (struct grouplist *)NULL) 1809 out_of_mem(); 1810 memset(gp, 0, sizeof(struct grouplist)); 1811 return (gp); 1812 } 1813 1814 /* 1815 * Clean up upon an error in get_exportlist(). 1816 */ 1817 void 1818 getexp_err(struct exportlist *ep, struct grouplist *grp) 1819 { 1820 struct grouplist *tgrp; 1821 1822 if (!(opt_flags & OP_QUIET)) 1823 syslog(LOG_ERR, "bad exports list line %s", line); 1824 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1825 free_exp(ep); 1826 while (grp) { 1827 tgrp = grp; 1828 grp = grp->gr_next; 1829 free_grp(tgrp); 1830 } 1831 } 1832 1833 /* 1834 * Search the export list for a matching fs. 1835 */ 1836 struct exportlist * 1837 ex_search(fsid_t *fsid) 1838 { 1839 struct exportlist *ep; 1840 1841 ep = exphead; 1842 while (ep) { 1843 if (ep->ex_fs.val[0] == fsid->val[0] && 1844 ep->ex_fs.val[1] == fsid->val[1]) 1845 return (ep); 1846 ep = ep->ex_next; 1847 } 1848 return (ep); 1849 } 1850 1851 /* 1852 * Add a directory path to the list. 1853 */ 1854 char * 1855 add_expdir(struct dirlist **dpp, char *cp, int len) 1856 { 1857 struct dirlist *dp; 1858 1859 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1860 if (dp == (struct dirlist *)NULL) 1861 out_of_mem(); 1862 dp->dp_left = *dpp; 1863 dp->dp_right = (struct dirlist *)NULL; 1864 dp->dp_flag = 0; 1865 dp->dp_hosts = (struct hostlist *)NULL; 1866 strcpy(dp->dp_dirp, cp); 1867 *dpp = dp; 1868 return (dp->dp_dirp); 1869 } 1870 1871 /* 1872 * Hang the dir list element off the dirpath binary tree as required 1873 * and update the entry for host. 1874 */ 1875 void 1876 hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 1877 int flags) 1878 { 1879 struct hostlist *hp; 1880 struct dirlist *dp2; 1881 1882 if (flags & OP_ALLDIRS) { 1883 if (ep->ex_defdir) 1884 free((caddr_t)dp); 1885 else 1886 ep->ex_defdir = dp; 1887 if (grp == (struct grouplist *)NULL) { 1888 ep->ex_defdir->dp_flag |= DP_DEFSET; 1889 } else while (grp) { 1890 hp = get_ht(); 1891 hp->ht_grp = grp; 1892 hp->ht_next = ep->ex_defdir->dp_hosts; 1893 ep->ex_defdir->dp_hosts = hp; 1894 grp = grp->gr_next; 1895 } 1896 } else { 1897 1898 /* 1899 * Loop through the directories adding them to the tree. 1900 */ 1901 while (dp) { 1902 dp2 = dp->dp_left; 1903 add_dlist(&ep->ex_dirl, dp, grp, flags); 1904 dp = dp2; 1905 } 1906 } 1907 } 1908 1909 /* 1910 * Traverse the binary tree either updating a node that is already there 1911 * for the new directory or adding the new node. 1912 */ 1913 void 1914 add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 1915 int flags) 1916 { 1917 struct dirlist *dp; 1918 struct hostlist *hp; 1919 int cmp; 1920 1921 dp = *dpp; 1922 if (dp) { 1923 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1924 if (cmp > 0) { 1925 add_dlist(&dp->dp_left, newdp, grp, flags); 1926 return; 1927 } else if (cmp < 0) { 1928 add_dlist(&dp->dp_right, newdp, grp, flags); 1929 return; 1930 } else 1931 free((caddr_t)newdp); 1932 } else { 1933 dp = newdp; 1934 dp->dp_left = (struct dirlist *)NULL; 1935 *dpp = dp; 1936 } 1937 if (grp) { 1938 1939 /* 1940 * Hang all of the host(s) off of the directory point. 1941 */ 1942 do { 1943 hp = get_ht(); 1944 hp->ht_grp = grp; 1945 hp->ht_next = dp->dp_hosts; 1946 dp->dp_hosts = hp; 1947 grp = grp->gr_next; 1948 } while (grp); 1949 } else { 1950 dp->dp_flag |= DP_DEFSET; 1951 } 1952 } 1953 1954 /* 1955 * Search for a dirpath on the export point. 1956 */ 1957 struct dirlist * 1958 dirp_search(struct dirlist *dp, char *dirp) 1959 { 1960 int cmp; 1961 1962 if (dp) { 1963 cmp = strcmp(dp->dp_dirp, dirp); 1964 if (cmp > 0) 1965 return (dirp_search(dp->dp_left, dirp)); 1966 else if (cmp < 0) 1967 return (dirp_search(dp->dp_right, dirp)); 1968 else 1969 return (dp); 1970 } 1971 return (dp); 1972 } 1973 1974 /* 1975 * Scan for a host match in a directory tree. 1976 */ 1977 int 1978 chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 1979 int *hostsetp) 1980 { 1981 struct hostlist *hp; 1982 struct grouplist *grp; 1983 struct addrinfo *ai; 1984 1985 if (dp) { 1986 if (dp->dp_flag & DP_DEFSET) 1987 *defsetp = dp->dp_flag; 1988 hp = dp->dp_hosts; 1989 while (hp) { 1990 grp = hp->ht_grp; 1991 switch (grp->gr_type) { 1992 case GT_HOST: 1993 ai = grp->gr_ptr.gt_addrinfo; 1994 for (; ai; ai = ai->ai_next) { 1995 if (!sacmp(ai->ai_addr, saddr, NULL)) { 1996 *hostsetp = 1997 (hp->ht_flag | DP_HOSTSET); 1998 return (1); 1999 } 2000 } 2001 break; 2002 case GT_NET: 2003 if (!sacmp(saddr, (struct sockaddr *) 2004 &grp->gr_ptr.gt_net.nt_net, 2005 (struct sockaddr *) 2006 &grp->gr_ptr.gt_net.nt_mask)) { 2007 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2008 return (1); 2009 } 2010 break; 2011 } 2012 hp = hp->ht_next; 2013 } 2014 } 2015 return (0); 2016 } 2017 2018 /* 2019 * Scan tree for a host that matches the address. 2020 */ 2021 int 2022 scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2023 { 2024 int defset, hostset; 2025 2026 if (dp) { 2027 if (scan_tree(dp->dp_left, saddr)) 2028 return (1); 2029 if (chk_host(dp, saddr, &defset, &hostset)) 2030 return (1); 2031 if (scan_tree(dp->dp_right, saddr)) 2032 return (1); 2033 } 2034 return (0); 2035 } 2036 2037 /* 2038 * Traverse the dirlist tree and free it up. 2039 */ 2040 void 2041 free_dir(struct dirlist *dp) 2042 { 2043 2044 if (dp) { 2045 free_dir(dp->dp_left); 2046 free_dir(dp->dp_right); 2047 free_host(dp->dp_hosts); 2048 free((caddr_t)dp); 2049 } 2050 } 2051 2052 /* 2053 * Parse a colon separated list of security flavors 2054 */ 2055 int 2056 parsesec(char *seclist, struct exportlist *ep) 2057 { 2058 char *cp, savedc; 2059 int flavor; 2060 2061 ep->ex_numsecflavors = 0; 2062 for (;;) { 2063 cp = strchr(seclist, ':'); 2064 if (cp) { 2065 savedc = *cp; 2066 *cp = '\0'; 2067 } 2068 2069 if (!strcmp(seclist, "sys")) 2070 flavor = AUTH_SYS; 2071 else if (!strcmp(seclist, "krb5")) 2072 flavor = RPCSEC_GSS_KRB5; 2073 else if (!strcmp(seclist, "krb5i")) 2074 flavor = RPCSEC_GSS_KRB5I; 2075 else if (!strcmp(seclist, "krb5p")) 2076 flavor = RPCSEC_GSS_KRB5P; 2077 else { 2078 if (cp) 2079 *cp = savedc; 2080 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2081 return (1); 2082 } 2083 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2084 if (cp) 2085 *cp = savedc; 2086 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2087 return (1); 2088 } 2089 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2090 ep->ex_numsecflavors++; 2091 if (cp) { 2092 *cp = savedc; 2093 seclist = cp + 1; 2094 } else { 2095 break; 2096 } 2097 } 2098 return (0); 2099 } 2100 2101 /* 2102 * Parse the option string and update fields. 2103 * Option arguments may either be -<option>=<value> or 2104 * -<option> <value> 2105 */ 2106 int 2107 do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2108 int *has_hostp, int *exflagsp, struct xucred *cr) 2109 { 2110 char *cpoptarg, *cpoptend; 2111 char *cp, *endcp, *cpopt, savedc, savedc2; 2112 int allflag, usedarg; 2113 2114 savedc2 = '\0'; 2115 cpopt = *cpp; 2116 cpopt++; 2117 cp = *endcpp; 2118 savedc = *cp; 2119 *cp = '\0'; 2120 while (cpopt && *cpopt) { 2121 allflag = 1; 2122 usedarg = -2; 2123 if ((cpoptend = strchr(cpopt, ','))) { 2124 *cpoptend++ = '\0'; 2125 if ((cpoptarg = strchr(cpopt, '='))) 2126 *cpoptarg++ = '\0'; 2127 } else { 2128 if ((cpoptarg = strchr(cpopt, '='))) 2129 *cpoptarg++ = '\0'; 2130 else { 2131 *cp = savedc; 2132 nextfield(&cp, &endcp); 2133 **endcpp = '\0'; 2134 if (endcp > cp && *cp != '-') { 2135 cpoptarg = cp; 2136 savedc2 = *endcp; 2137 *endcp = '\0'; 2138 usedarg = 0; 2139 } 2140 } 2141 } 2142 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2143 *exflagsp |= MNT_EXRDONLY; 2144 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2145 !(allflag = strcmp(cpopt, "mapall")) || 2146 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2147 usedarg++; 2148 parsecred(cpoptarg, cr); 2149 if (allflag == 0) { 2150 *exflagsp |= MNT_EXPORTANON; 2151 opt_flags |= OP_MAPALL; 2152 } else 2153 opt_flags |= OP_MAPROOT; 2154 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2155 !strcmp(cpopt, "m"))) { 2156 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2157 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2158 return (1); 2159 } 2160 usedarg++; 2161 opt_flags |= OP_MASK; 2162 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2163 !strcmp(cpopt, "n"))) { 2164 if (strchr(cpoptarg, '/') != NULL) { 2165 if (debug) 2166 fprintf(stderr, "setting OP_MASKLEN\n"); 2167 opt_flags |= OP_MASKLEN; 2168 } 2169 if (grp->gr_type != GT_NULL) { 2170 syslog(LOG_ERR, "network/host conflict"); 2171 return (1); 2172 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2173 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2174 return (1); 2175 } 2176 grp->gr_type = GT_NET; 2177 *has_hostp = 1; 2178 usedarg++; 2179 opt_flags |= OP_NET; 2180 } else if (!strcmp(cpopt, "alldirs")) { 2181 opt_flags |= OP_ALLDIRS; 2182 } else if (!strcmp(cpopt, "public")) { 2183 *exflagsp |= MNT_EXPUBLIC; 2184 } else if (!strcmp(cpopt, "webnfs")) { 2185 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2186 opt_flags |= OP_MAPALL; 2187 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2188 ep->ex_indexfile = strdup(cpoptarg); 2189 } else if (!strcmp(cpopt, "quiet")) { 2190 opt_flags |= OP_QUIET; 2191 } else if (!strcmp(cpopt, "sec")) { 2192 if (parsesec(cpoptarg, ep)) 2193 return (1); 2194 opt_flags |= OP_SEC; 2195 usedarg++; 2196 } else { 2197 syslog(LOG_ERR, "bad opt %s", cpopt); 2198 return (1); 2199 } 2200 if (usedarg >= 0) { 2201 *endcp = savedc2; 2202 **endcpp = savedc; 2203 if (usedarg > 0) { 2204 *cpp = cp; 2205 *endcpp = endcp; 2206 } 2207 return (0); 2208 } 2209 cpopt = cpoptend; 2210 } 2211 **endcpp = savedc; 2212 return (0); 2213 } 2214 2215 /* 2216 * Translate a character string to the corresponding list of network 2217 * addresses for a hostname. 2218 */ 2219 int 2220 get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 2221 { 2222 struct grouplist *checkgrp; 2223 struct addrinfo *ai, *tai, hints; 2224 int ecode; 2225 char host[NI_MAXHOST]; 2226 2227 if (grp->gr_type != GT_NULL) { 2228 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2229 return (1); 2230 } 2231 memset(&hints, 0, sizeof hints); 2232 hints.ai_flags = AI_CANONNAME; 2233 hints.ai_protocol = IPPROTO_UDP; 2234 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2235 if (ecode != 0) { 2236 syslog(LOG_ERR,"can't get address info for host %s", cp); 2237 return 1; 2238 } 2239 grp->gr_ptr.gt_addrinfo = ai; 2240 while (ai != NULL) { 2241 if (ai->ai_canonname == NULL) { 2242 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2243 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2244 strlcpy(host, "?", sizeof(host)); 2245 ai->ai_canonname = strdup(host); 2246 ai->ai_flags |= AI_CANONNAME; 2247 } 2248 if (debug) 2249 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2250 /* 2251 * Sanity check: make sure we don't already have an entry 2252 * for this host in the grouplist. 2253 */ 2254 for (checkgrp = tgrp; checkgrp != NULL; 2255 checkgrp = checkgrp->gr_next) { 2256 if (checkgrp->gr_type != GT_HOST) 2257 continue; 2258 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2259 tai = tai->ai_next) { 2260 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2261 continue; 2262 if (debug) 2263 fprintf(stderr, 2264 "ignoring duplicate host %s\n", 2265 ai->ai_canonname); 2266 grp->gr_type = GT_IGNORE; 2267 return (0); 2268 } 2269 } 2270 ai = ai->ai_next; 2271 } 2272 grp->gr_type = GT_HOST; 2273 return (0); 2274 } 2275 2276 /* 2277 * Free up an exports list component 2278 */ 2279 void 2280 free_exp(struct exportlist *ep) 2281 { 2282 2283 if (ep->ex_defdir) { 2284 free_host(ep->ex_defdir->dp_hosts); 2285 free((caddr_t)ep->ex_defdir); 2286 } 2287 if (ep->ex_fsdir) 2288 free(ep->ex_fsdir); 2289 if (ep->ex_indexfile) 2290 free(ep->ex_indexfile); 2291 free_dir(ep->ex_dirl); 2292 free((caddr_t)ep); 2293 } 2294 2295 /* 2296 * Free hosts. 2297 */ 2298 void 2299 free_host(struct hostlist *hp) 2300 { 2301 struct hostlist *hp2; 2302 2303 while (hp) { 2304 hp2 = hp; 2305 hp = hp->ht_next; 2306 free((caddr_t)hp2); 2307 } 2308 } 2309 2310 struct hostlist * 2311 get_ht(void) 2312 { 2313 struct hostlist *hp; 2314 2315 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2316 if (hp == (struct hostlist *)NULL) 2317 out_of_mem(); 2318 hp->ht_next = (struct hostlist *)NULL; 2319 hp->ht_flag = 0; 2320 return (hp); 2321 } 2322 2323 /* 2324 * Out of memory, fatal 2325 */ 2326 void 2327 out_of_mem(void) 2328 { 2329 2330 syslog(LOG_ERR, "out of memory"); 2331 exit(2); 2332 } 2333 2334 /* 2335 * Do the nmount() syscall with the update flag to push the export info into 2336 * the kernel. 2337 */ 2338 int 2339 do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2340 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 2341 { 2342 struct statfs fsb1; 2343 struct addrinfo *ai; 2344 struct export_args ea, *eap; 2345 char errmsg[255]; 2346 char *cp; 2347 int done; 2348 char savedc; 2349 struct iovec *iov; 2350 int i, iovlen; 2351 int ret; 2352 struct nfsex_args nfsea; 2353 2354 if (run_v4server > 0) 2355 eap = &nfsea.export; 2356 else 2357 eap = &ea; 2358 2359 cp = NULL; 2360 savedc = '\0'; 2361 iov = NULL; 2362 iovlen = 0; 2363 ret = 0; 2364 2365 bzero(eap, sizeof (struct export_args)); 2366 bzero(errmsg, sizeof(errmsg)); 2367 eap->ex_flags = exflags; 2368 eap->ex_anon = *anoncrp; 2369 eap->ex_indexfile = ep->ex_indexfile; 2370 if (grp->gr_type == GT_HOST) 2371 ai = grp->gr_ptr.gt_addrinfo; 2372 else 2373 ai = NULL; 2374 eap->ex_numsecflavors = ep->ex_numsecflavors; 2375 for (i = 0; i < eap->ex_numsecflavors; i++) 2376 eap->ex_secflavors[i] = ep->ex_secflavors[i]; 2377 if (eap->ex_numsecflavors == 0) { 2378 eap->ex_numsecflavors = 1; 2379 eap->ex_secflavors[0] = AUTH_SYS; 2380 } 2381 done = FALSE; 2382 2383 if (v4root_phase == 0) { 2384 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2385 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2386 build_iovec(&iov, &iovlen, "from", NULL, 0); 2387 build_iovec(&iov, &iovlen, "update", NULL, 0); 2388 build_iovec(&iov, &iovlen, "export", eap, 2389 sizeof (struct export_args)); 2390 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 2391 } 2392 2393 while (!done) { 2394 switch (grp->gr_type) { 2395 case GT_HOST: 2396 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 2397 goto skip; 2398 eap->ex_addr = ai->ai_addr; 2399 eap->ex_addrlen = ai->ai_addrlen; 2400 eap->ex_masklen = 0; 2401 break; 2402 case GT_NET: 2403 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 2404 have_v6 == 0) 2405 goto skip; 2406 eap->ex_addr = 2407 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 2408 eap->ex_addrlen = 2409 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 2410 eap->ex_mask = 2411 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 2412 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 2413 break; 2414 case GT_DEFAULT: 2415 eap->ex_addr = NULL; 2416 eap->ex_addrlen = 0; 2417 eap->ex_mask = NULL; 2418 eap->ex_masklen = 0; 2419 break; 2420 case GT_IGNORE: 2421 ret = 0; 2422 goto error_exit; 2423 break; 2424 default: 2425 syslog(LOG_ERR, "bad grouptype"); 2426 if (cp) 2427 *cp = savedc; 2428 ret = 1; 2429 goto error_exit; 2430 }; 2431 2432 /* 2433 * For V4:, use the nfssvc() syscall, instead of mount(). 2434 */ 2435 if (v4root_phase == 2) { 2436 nfsea.fspec = v4root_dirpath; 2437 if (run_v4server > 0 && 2438 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 2439 syslog(LOG_ERR, "Exporting V4: failed"); 2440 return (2); 2441 } 2442 } else { 2443 /* 2444 * XXX: 2445 * Maybe I should just use the fsb->f_mntonname path 2446 * instead of looping back up the dirp to the mount 2447 * point?? 2448 * Also, needs to know how to export all types of local 2449 * exportable filesystems and not just "ufs". 2450 */ 2451 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 2452 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 2453 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 2454 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 2455 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 2456 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 2457 2458 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 2459 if (cp) 2460 *cp-- = savedc; 2461 else 2462 cp = dirp + dirplen - 1; 2463 if (opt_flags & OP_QUIET) { 2464 ret = 1; 2465 goto error_exit; 2466 } 2467 if (errno == EPERM) { 2468 if (debug) 2469 warnx("can't change attributes for %s", 2470 dirp); 2471 syslog(LOG_ERR, 2472 "can't change attributes for %s", 2473 dirp); 2474 ret = 1; 2475 goto error_exit; 2476 } 2477 if (opt_flags & OP_ALLDIRS) { 2478 if (errno == EINVAL) 2479 syslog(LOG_ERR, 2480 "-alldirs requested but %s is not a filesystem mountpoint", 2481 dirp); 2482 else 2483 syslog(LOG_ERR, 2484 "could not remount %s: %m", 2485 dirp); 2486 ret = 1; 2487 goto error_exit; 2488 } 2489 /* back up over the last component */ 2490 while (*cp == '/' && cp > dirp) 2491 cp--; 2492 while (*(cp - 1) != '/' && cp > dirp) 2493 cp--; 2494 if (cp == dirp) { 2495 if (debug) 2496 warnx("mnt unsucc"); 2497 syslog(LOG_ERR, "can't export %s %s", 2498 dirp, errmsg); 2499 ret = 1; 2500 goto error_exit; 2501 } 2502 savedc = *cp; 2503 *cp = '\0'; 2504 /* 2505 * Check that we're still on the same 2506 * filesystem. 2507 */ 2508 if (statfs(dirp, &fsb1) != 0 || 2509 bcmp(&fsb1.f_fsid, &fsb->f_fsid, 2510 sizeof (fsb1.f_fsid)) != 0) { 2511 *cp = savedc; 2512 syslog(LOG_ERR, 2513 "can't export %s %s", dirp, 2514 errmsg); 2515 ret = 1; 2516 goto error_exit; 2517 } 2518 } 2519 } 2520 2521 /* 2522 * For the experimental server: 2523 * If this is the public directory, get the file handle 2524 * and load it into the kernel via the nfssvc() syscall. 2525 */ 2526 if (run_v4server > 0 && (exflags & MNT_EXPUBLIC) != 0) { 2527 fhandle_t fh; 2528 char *public_name; 2529 2530 if (eap->ex_indexfile != NULL) 2531 public_name = eap->ex_indexfile; 2532 else 2533 public_name = dirp; 2534 if (getfh(public_name, &fh) < 0) 2535 syslog(LOG_ERR, 2536 "Can't get public fh for %s", public_name); 2537 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 2538 syslog(LOG_ERR, 2539 "Can't set public fh for %s", public_name); 2540 else 2541 has_publicfh = 1; 2542 } 2543 skip: 2544 if (ai != NULL) 2545 ai = ai->ai_next; 2546 if (ai == NULL) 2547 done = TRUE; 2548 } 2549 if (cp) 2550 *cp = savedc; 2551 error_exit: 2552 /* free strings allocated by strdup() in getmntopts.c */ 2553 if (iov != NULL) { 2554 free(iov[0].iov_base); /* fstype */ 2555 free(iov[2].iov_base); /* fspath */ 2556 free(iov[4].iov_base); /* from */ 2557 free(iov[6].iov_base); /* update */ 2558 free(iov[8].iov_base); /* export */ 2559 free(iov[10].iov_base); /* errmsg */ 2560 2561 /* free iov, allocated by realloc() */ 2562 free(iov); 2563 } 2564 return (ret); 2565 } 2566 2567 /* 2568 * Translate a net address. 2569 * 2570 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2571 */ 2572 int 2573 get_net(char *cp, struct netmsk *net, int maskflg) 2574 { 2575 struct netent *np = NULL; 2576 char *name, *p, *prefp; 2577 struct sockaddr_in sin; 2578 struct sockaddr *sa = NULL; 2579 struct addrinfo hints, *ai = NULL; 2580 char netname[NI_MAXHOST]; 2581 long preflen; 2582 2583 p = prefp = NULL; 2584 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2585 p = strchr(cp, '/'); 2586 *p = '\0'; 2587 prefp = p + 1; 2588 } 2589 2590 /* 2591 * Check for a numeric address first. We wish to avoid 2592 * possible DNS lookups in getnetbyname(). 2593 */ 2594 if (isxdigit(*cp) || *cp == ':') { 2595 memset(&hints, 0, sizeof hints); 2596 /* Ensure the mask and the network have the same family. */ 2597 if (maskflg && (opt_flags & OP_NET)) 2598 hints.ai_family = net->nt_net.ss_family; 2599 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2600 hints.ai_family = net->nt_mask.ss_family; 2601 else 2602 hints.ai_family = AF_UNSPEC; 2603 hints.ai_flags = AI_NUMERICHOST; 2604 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2605 sa = ai->ai_addr; 2606 if (sa != NULL && ai->ai_family == AF_INET) { 2607 /* 2608 * The address in `cp' is really a network address, so 2609 * use inet_network() to re-interpret this correctly. 2610 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2611 */ 2612 bzero(&sin, sizeof sin); 2613 sin.sin_family = AF_INET; 2614 sin.sin_len = sizeof sin; 2615 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2616 if (debug) 2617 fprintf(stderr, "get_net: v4 addr %s\n", 2618 inet_ntoa(sin.sin_addr)); 2619 sa = (struct sockaddr *)&sin; 2620 } 2621 } 2622 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2623 bzero(&sin, sizeof sin); 2624 sin.sin_family = AF_INET; 2625 sin.sin_len = sizeof sin; 2626 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2627 sa = (struct sockaddr *)&sin; 2628 } 2629 if (sa == NULL) 2630 goto fail; 2631 2632 if (maskflg) { 2633 /* The specified sockaddr is a mask. */ 2634 if (checkmask(sa) != 0) 2635 goto fail; 2636 bcopy(sa, &net->nt_mask, sa->sa_len); 2637 opt_flags |= OP_HAVEMASK; 2638 } else { 2639 /* The specified sockaddr is a network address. */ 2640 bcopy(sa, &net->nt_net, sa->sa_len); 2641 2642 /* Get a network name for the export list. */ 2643 if (np) { 2644 name = np->n_name; 2645 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2646 NULL, 0, NI_NUMERICHOST) == 0) { 2647 name = netname; 2648 } else { 2649 goto fail; 2650 } 2651 if ((net->nt_name = strdup(name)) == NULL) 2652 out_of_mem(); 2653 2654 /* 2655 * Extract a mask from either a "/<masklen>" suffix, or 2656 * from the class of an IPv4 address. 2657 */ 2658 if (opt_flags & OP_MASKLEN) { 2659 preflen = strtol(prefp, NULL, 10); 2660 if (preflen < 0L || preflen == LONG_MAX) 2661 goto fail; 2662 bcopy(sa, &net->nt_mask, sa->sa_len); 2663 if (makemask(&net->nt_mask, (int)preflen) != 0) 2664 goto fail; 2665 opt_flags |= OP_HAVEMASK; 2666 *p = '/'; 2667 } else if (sa->sa_family == AF_INET && 2668 (opt_flags & OP_MASK) == 0) { 2669 in_addr_t addr; 2670 2671 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2672 if (IN_CLASSA(addr)) 2673 preflen = 8; 2674 else if (IN_CLASSB(addr)) 2675 preflen = 16; 2676 else if (IN_CLASSC(addr)) 2677 preflen = 24; 2678 else if (IN_CLASSD(addr)) 2679 preflen = 28; 2680 else 2681 preflen = 32; /* XXX */ 2682 2683 bcopy(sa, &net->nt_mask, sa->sa_len); 2684 makemask(&net->nt_mask, (int)preflen); 2685 opt_flags |= OP_HAVEMASK; 2686 } 2687 } 2688 2689 if (ai) 2690 freeaddrinfo(ai); 2691 return 0; 2692 2693 fail: 2694 if (ai) 2695 freeaddrinfo(ai); 2696 return 1; 2697 } 2698 2699 /* 2700 * Parse out the next white space separated field 2701 */ 2702 void 2703 nextfield(char **cp, char **endcp) 2704 { 2705 char *p; 2706 2707 p = *cp; 2708 while (*p == ' ' || *p == '\t') 2709 p++; 2710 if (*p == '\n' || *p == '\0') 2711 *cp = *endcp = p; 2712 else { 2713 *cp = p++; 2714 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2715 p++; 2716 *endcp = p; 2717 } 2718 } 2719 2720 /* 2721 * Get an exports file line. Skip over blank lines and handle line 2722 * continuations. 2723 */ 2724 int 2725 get_line(void) 2726 { 2727 char *p, *cp; 2728 size_t len; 2729 int totlen, cont_line; 2730 2731 /* 2732 * Loop around ignoring blank lines and getting all continuation lines. 2733 */ 2734 p = line; 2735 totlen = 0; 2736 do { 2737 if ((p = fgetln(exp_file, &len)) == NULL) 2738 return (0); 2739 cp = p + len - 1; 2740 cont_line = 0; 2741 while (cp >= p && 2742 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2743 if (*cp == '\\') 2744 cont_line = 1; 2745 cp--; 2746 len--; 2747 } 2748 if (cont_line) { 2749 *++cp = ' '; 2750 len++; 2751 } 2752 if (linesize < len + totlen + 1) { 2753 linesize = len + totlen + 1; 2754 line = realloc(line, linesize); 2755 if (line == NULL) 2756 out_of_mem(); 2757 } 2758 memcpy(line + totlen, p, len); 2759 totlen += len; 2760 line[totlen] = '\0'; 2761 } while (totlen == 0 || cont_line); 2762 return (1); 2763 } 2764 2765 /* 2766 * Parse a description of a credential. 2767 */ 2768 void 2769 parsecred(char *namelist, struct xucred *cr) 2770 { 2771 char *name; 2772 int cnt; 2773 char *names; 2774 struct passwd *pw; 2775 struct group *gr; 2776 gid_t groups[XU_NGROUPS + 1]; 2777 int ngroups; 2778 2779 cr->cr_version = XUCRED_VERSION; 2780 /* 2781 * Set up the unprivileged user. 2782 */ 2783 cr->cr_uid = -2; 2784 cr->cr_groups[0] = -2; 2785 cr->cr_ngroups = 1; 2786 /* 2787 * Get the user's password table entry. 2788 */ 2789 names = strsep(&namelist, " \t\n"); 2790 name = strsep(&names, ":"); 2791 if (isdigit(*name) || *name == '-') 2792 pw = getpwuid(atoi(name)); 2793 else 2794 pw = getpwnam(name); 2795 /* 2796 * Credentials specified as those of a user. 2797 */ 2798 if (names == NULL) { 2799 if (pw == NULL) { 2800 syslog(LOG_ERR, "unknown user: %s", name); 2801 return; 2802 } 2803 cr->cr_uid = pw->pw_uid; 2804 ngroups = XU_NGROUPS + 1; 2805 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2806 syslog(LOG_ERR, "too many groups"); 2807 /* 2808 * Compress out duplicate. 2809 */ 2810 cr->cr_ngroups = ngroups - 1; 2811 cr->cr_groups[0] = groups[0]; 2812 for (cnt = 2; cnt < ngroups; cnt++) 2813 cr->cr_groups[cnt - 1] = groups[cnt]; 2814 return; 2815 } 2816 /* 2817 * Explicit credential specified as a colon separated list: 2818 * uid:gid:gid:... 2819 */ 2820 if (pw != NULL) 2821 cr->cr_uid = pw->pw_uid; 2822 else if (isdigit(*name) || *name == '-') 2823 cr->cr_uid = atoi(name); 2824 else { 2825 syslog(LOG_ERR, "unknown user: %s", name); 2826 return; 2827 } 2828 cr->cr_ngroups = 0; 2829 while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) { 2830 name = strsep(&names, ":"); 2831 if (isdigit(*name) || *name == '-') { 2832 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2833 } else { 2834 if ((gr = getgrnam(name)) == NULL) { 2835 syslog(LOG_ERR, "unknown group: %s", name); 2836 continue; 2837 } 2838 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2839 } 2840 } 2841 if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS) 2842 syslog(LOG_ERR, "too many groups"); 2843 } 2844 2845 #define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 2846 /* 2847 * Routines that maintain the remote mounttab 2848 */ 2849 void 2850 get_mountlist(void) 2851 { 2852 struct mountlist *mlp, **mlpp; 2853 char *host, *dirp, *cp; 2854 char str[STRSIZ]; 2855 FILE *mlfile; 2856 2857 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2858 if (errno == ENOENT) 2859 return; 2860 else { 2861 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 2862 return; 2863 } 2864 } 2865 mlpp = &mlhead; 2866 while (fgets(str, STRSIZ, mlfile) != NULL) { 2867 cp = str; 2868 host = strsep(&cp, " \t\n"); 2869 dirp = strsep(&cp, " \t\n"); 2870 if (host == NULL || dirp == NULL) 2871 continue; 2872 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2873 if (mlp == (struct mountlist *)NULL) 2874 out_of_mem(); 2875 strncpy(mlp->ml_host, host, MNTNAMLEN); 2876 mlp->ml_host[MNTNAMLEN] = '\0'; 2877 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 2878 mlp->ml_dirp[MNTPATHLEN] = '\0'; 2879 mlp->ml_next = (struct mountlist *)NULL; 2880 *mlpp = mlp; 2881 mlpp = &mlp->ml_next; 2882 } 2883 fclose(mlfile); 2884 } 2885 2886 void 2887 del_mlist(char *hostp, char *dirp) 2888 { 2889 struct mountlist *mlp, **mlpp; 2890 struct mountlist *mlp2; 2891 FILE *mlfile; 2892 int fnd = 0; 2893 2894 mlpp = &mlhead; 2895 mlp = mlhead; 2896 while (mlp) { 2897 if (!strcmp(mlp->ml_host, hostp) && 2898 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2899 fnd = 1; 2900 mlp2 = mlp; 2901 *mlpp = mlp = mlp->ml_next; 2902 free((caddr_t)mlp2); 2903 } else { 2904 mlpp = &mlp->ml_next; 2905 mlp = mlp->ml_next; 2906 } 2907 } 2908 if (fnd) { 2909 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2910 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 2911 return; 2912 } 2913 mlp = mlhead; 2914 while (mlp) { 2915 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2916 mlp = mlp->ml_next; 2917 } 2918 fclose(mlfile); 2919 } 2920 } 2921 2922 void 2923 add_mlist(char *hostp, char *dirp) 2924 { 2925 struct mountlist *mlp, **mlpp; 2926 FILE *mlfile; 2927 2928 mlpp = &mlhead; 2929 mlp = mlhead; 2930 while (mlp) { 2931 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2932 return; 2933 mlpp = &mlp->ml_next; 2934 mlp = mlp->ml_next; 2935 } 2936 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2937 if (mlp == (struct mountlist *)NULL) 2938 out_of_mem(); 2939 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 2940 mlp->ml_host[MNTNAMLEN] = '\0'; 2941 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 2942 mlp->ml_dirp[MNTPATHLEN] = '\0'; 2943 mlp->ml_next = (struct mountlist *)NULL; 2944 *mlpp = mlp; 2945 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2946 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 2947 return; 2948 } 2949 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2950 fclose(mlfile); 2951 } 2952 2953 /* 2954 * Free up a group list. 2955 */ 2956 void 2957 free_grp(struct grouplist *grp) 2958 { 2959 if (grp->gr_type == GT_HOST) { 2960 if (grp->gr_ptr.gt_addrinfo != NULL) 2961 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 2962 } else if (grp->gr_type == GT_NET) { 2963 if (grp->gr_ptr.gt_net.nt_name) 2964 free(grp->gr_ptr.gt_net.nt_name); 2965 } 2966 free((caddr_t)grp); 2967 } 2968 2969 #ifdef DEBUG 2970 void 2971 SYSLOG(int pri, const char *fmt, ...) 2972 { 2973 va_list ap; 2974 2975 va_start(ap, fmt); 2976 vfprintf(stderr, fmt, ap); 2977 va_end(ap); 2978 } 2979 #endif /* DEBUG */ 2980 2981 /* 2982 * Check options for consistency. 2983 */ 2984 int 2985 check_options(struct dirlist *dp) 2986 { 2987 2988 if (v4root_phase == 0 && dp == NULL) 2989 return (1); 2990 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 2991 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 2992 return (1); 2993 } 2994 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2995 syslog(LOG_ERR, "-mask requires -network"); 2996 return (1); 2997 } 2998 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 2999 syslog(LOG_ERR, "-network requires mask specification"); 3000 return (1); 3001 } 3002 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3003 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3004 return (1); 3005 } 3006 if (v4root_phase > 0 && 3007 (opt_flags & 3008 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3009 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3010 return (1); 3011 } 3012 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3013 syslog(LOG_ERR, "-alldirs has multiple directories"); 3014 return (1); 3015 } 3016 return (0); 3017 } 3018 3019 /* 3020 * Check an absolute directory path for any symbolic links. Return true 3021 */ 3022 int 3023 check_dirpath(char *dirp) 3024 { 3025 char *cp; 3026 int ret = 1; 3027 struct stat sb; 3028 3029 cp = dirp + 1; 3030 while (*cp && ret) { 3031 if (*cp == '/') { 3032 *cp = '\0'; 3033 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3034 ret = 0; 3035 *cp = '/'; 3036 } 3037 cp++; 3038 } 3039 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3040 ret = 0; 3041 return (ret); 3042 } 3043 3044 /* 3045 * Make a netmask according to the specified prefix length. The ss_family 3046 * and other non-address fields must be initialised before calling this. 3047 */ 3048 int 3049 makemask(struct sockaddr_storage *ssp, int bitlen) 3050 { 3051 u_char *p; 3052 int bits, i, len; 3053 3054 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3055 return (-1); 3056 if (bitlen > len * CHAR_BIT) 3057 return (-1); 3058 3059 for (i = 0; i < len; i++) { 3060 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 3061 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3062 bitlen -= bits; 3063 } 3064 return 0; 3065 } 3066 3067 /* 3068 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 3069 * is acceptable (i.e. of the form 1...10....0). 3070 */ 3071 int 3072 checkmask(struct sockaddr *sa) 3073 { 3074 u_char *mask; 3075 int i, len; 3076 3077 if ((mask = sa_rawaddr(sa, &len)) == NULL) 3078 return (-1); 3079 3080 for (i = 0; i < len; i++) 3081 if (mask[i] != 0xff) 3082 break; 3083 if (i < len) { 3084 if (~mask[i] & (u_char)(~mask[i] + 1)) 3085 return (-1); 3086 i++; 3087 } 3088 for (; i < len; i++) 3089 if (mask[i] != 0) 3090 return (-1); 3091 return (0); 3092 } 3093 3094 /* 3095 * Compare two sockaddrs according to a specified mask. Return zero if 3096 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 3097 * If samask is NULL, perform a full comparision. 3098 */ 3099 int 3100 sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 3101 { 3102 unsigned char *p1, *p2, *mask; 3103 int len, i; 3104 3105 if (sa1->sa_family != sa2->sa_family || 3106 (p1 = sa_rawaddr(sa1, &len)) == NULL || 3107 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 3108 return (1); 3109 3110 switch (sa1->sa_family) { 3111 case AF_INET6: 3112 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 3113 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 3114 return (1); 3115 break; 3116 } 3117 3118 /* Simple binary comparison if no mask specified. */ 3119 if (samask == NULL) 3120 return (memcmp(p1, p2, len)); 3121 3122 /* Set up the mask, and do a mask-based comparison. */ 3123 if (sa1->sa_family != samask->sa_family || 3124 (mask = sa_rawaddr(samask, NULL)) == NULL) 3125 return (1); 3126 3127 for (i = 0; i < len; i++) 3128 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3129 return (1); 3130 return (0); 3131 } 3132 3133 /* 3134 * Return a pointer to the part of the sockaddr that contains the 3135 * raw address, and set *nbytes to its length in bytes. Returns 3136 * NULL if the address family is unknown. 3137 */ 3138 void * 3139 sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3140 void *p; 3141 int len; 3142 3143 switch (sa->sa_family) { 3144 case AF_INET: 3145 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3146 p = &((struct sockaddr_in *)sa)->sin_addr; 3147 break; 3148 case AF_INET6: 3149 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3150 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3151 break; 3152 default: 3153 p = NULL; 3154 len = 0; 3155 } 3156 3157 if (nbytes != NULL) 3158 *nbytes = len; 3159 return (p); 3160 } 3161 3162 void 3163 huphandler(int sig __unused) 3164 { 3165 got_sighup = 1; 3166 } 3167 3168 void terminate(int sig __unused) 3169 { 3170 pidfile_remove(pfh); 3171 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 3172 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 3173 exit (0); 3174 } 3175 3176