mountd.c revision 308452
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 34static 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 41static 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: stable/10/usr.sbin/mountd/mountd.c 308452 2016-11-08 21:39:15Z rmacklem $"); 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 */ 93struct mountlist { 94 struct mountlist *ml_next; 95 char ml_host[MNTNAMLEN+1]; 96 char ml_dirp[MNTPATHLEN+1]; 97}; 98 99struct 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 110struct exportlist { 111 struct exportlist *ex_next; 112 struct dirlist *ex_dirl; 113 struct dirlist *ex_defdir; 114 int ex_flag; 115 fsid_t ex_fs; 116 char *ex_fsdir; 117 char *ex_indexfile; 118 int ex_numsecflavors; 119 int ex_secflavors[MAXSECFLAVORS]; 120 int ex_defnumsecflavors; 121 int ex_defsecflavors[MAXSECFLAVORS]; 122}; 123/* ex_flag bits */ 124#define EX_LINKED 0x1 125 126struct netmsk { 127 struct sockaddr_storage nt_net; 128 struct sockaddr_storage nt_mask; 129 char *nt_name; 130}; 131 132union grouptypes { 133 struct addrinfo *gt_addrinfo; 134 struct netmsk gt_net; 135}; 136 137struct grouplist { 138 int gr_type; 139 union grouptypes gr_ptr; 140 struct grouplist *gr_next; 141 int gr_numsecflavors; 142 int gr_secflavors[MAXSECFLAVORS]; 143}; 144/* Group types */ 145#define GT_NULL 0x0 146#define GT_HOST 0x1 147#define GT_NET 0x2 148#define GT_DEFAULT 0x3 149#define GT_IGNORE 0x5 150 151struct hostlist { 152 int ht_flag; /* Uses DP_xx bits */ 153 struct grouplist *ht_grp; 154 struct hostlist *ht_next; 155}; 156 157struct fhreturn { 158 int fhr_flag; 159 int fhr_vers; 160 nfsfh_t fhr_fh; 161 int fhr_numsecflavors; 162 int *fhr_secflavors; 163}; 164 165#define GETPORT_MAXTRY 20 /* Max tries to get a port # */ 166 167/* Global defs */ 168char *add_expdir(struct dirlist **, char *, int); 169void add_dlist(struct dirlist **, struct dirlist *, 170 struct grouplist *, int, struct exportlist *); 171void add_mlist(char *, char *); 172int check_dirpath(char *); 173int check_options(struct dirlist *); 174int checkmask(struct sockaddr *sa); 175int chk_host(struct dirlist *, struct sockaddr *, int *, int *, int *, 176 int **); 177static char *strsep_quote(char **stringp, const char *delim); 178static int create_service(struct netconfig *nconf); 179static void complete_service(struct netconfig *nconf, char *port_str); 180static void clearout_service(void); 181void del_mlist(char *hostp, char *dirp); 182struct dirlist *dirp_search(struct dirlist *, char *); 183int do_mount(struct exportlist *, struct grouplist *, int, 184 struct xucred *, char *, int, struct statfs *); 185int do_opt(char **, char **, struct exportlist *, struct grouplist *, 186 int *, int *, struct xucred *); 187struct exportlist *ex_search(fsid_t *); 188struct exportlist *get_exp(void); 189void free_dir(struct dirlist *); 190void free_exp(struct exportlist *); 191void free_grp(struct grouplist *); 192void free_host(struct hostlist *); 193void get_exportlist(void); 194int get_host(char *, struct grouplist *, struct grouplist *); 195struct hostlist *get_ht(void); 196int get_line(void); 197void get_mountlist(void); 198int get_net(char *, struct netmsk *, int); 199void getexp_err(struct exportlist *, struct grouplist *); 200struct grouplist *get_grp(void); 201void hang_dirp(struct dirlist *, struct grouplist *, 202 struct exportlist *, int); 203void huphandler(int sig); 204int makemask(struct sockaddr_storage *ssp, int bitlen); 205void mntsrv(struct svc_req *, SVCXPRT *); 206void nextfield(char **, char **); 207void out_of_mem(void); 208void parsecred(char *, struct xucred *); 209int parsesec(char *, struct exportlist *); 210int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int); 211void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 212int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 213 struct sockaddr *samask); 214int scan_tree(struct dirlist *, struct sockaddr *); 215static void usage(void); 216int xdr_dir(XDR *, char *); 217int xdr_explist(XDR *, caddr_t); 218int xdr_explist_brief(XDR *, caddr_t); 219int xdr_explist_common(XDR *, caddr_t, int); 220int xdr_fhs(XDR *, caddr_t); 221int xdr_mlist(XDR *, caddr_t); 222void terminate(int); 223 224struct exportlist *exphead; 225struct mountlist *mlhead; 226struct grouplist *grphead; 227char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 228char **exnames; 229char **hosts = NULL; 230struct xucred def_anon = { 231 XUCRED_VERSION, 232 (uid_t)-2, 233 1, 234 { (gid_t)-2 }, 235 NULL 236}; 237int force_v2 = 0; 238int resvport_only = 1; 239int nhosts = 0; 240int dir_only = 1; 241int dolog = 0; 242int got_sighup = 0; 243int xcreated = 0; 244 245char *svcport_str = NULL; 246static int mallocd_svcport = 0; 247static int *sock_fd; 248static int sock_fdcnt; 249static int sock_fdpos; 250static int suspend_nfsd = 0; 251 252int opt_flags; 253static int have_v6 = 1; 254 255int v4root_phase = 0; 256char v4root_dirpath[PATH_MAX + 1]; 257int run_v4server = 1; 258int has_publicfh = 0; 259 260struct pidfh *pfh = NULL; 261/* Bits for opt_flags above */ 262#define OP_MAPROOT 0x01 263#define OP_MAPALL 0x02 264/* 0x4 free */ 265#define OP_MASK 0x08 266#define OP_NET 0x10 267#define OP_ALLDIRS 0x40 268#define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 269#define OP_QUIET 0x100 270#define OP_MASKLEN 0x200 271#define OP_SEC 0x400 272 273#ifdef DEBUG 274int debug = 1; 275void SYSLOG(int, const char *, ...) __printflike(2, 3); 276#define syslog SYSLOG 277#else 278int debug = 0; 279#endif 280 281/* 282 * Similar to strsep(), but it allows for quoted strings 283 * and escaped characters. 284 * 285 * It returns the string (or NULL, if *stringp is NULL), 286 * which is a de-quoted version of the string if necessary. 287 * 288 * It modifies *stringp in place. 289 */ 290static char * 291strsep_quote(char **stringp, const char *delim) 292{ 293 char *srcptr, *dstptr, *retval; 294 char quot = 0; 295 296 if (stringp == NULL || *stringp == NULL) 297 return (NULL); 298 299 srcptr = dstptr = retval = *stringp; 300 301 while (*srcptr) { 302 /* 303 * We're looking for several edge cases here. 304 * First: if we're in quote state (quot != 0), 305 * then we ignore the delim characters, but otherwise 306 * process as normal, unless it is the quote character. 307 * Second: if the current character is a backslash, 308 * we take the next character as-is, without checking 309 * for delim, quote, or backslash. Exception: if the 310 * next character is a NUL, that's the end of the string. 311 * Third: if the character is a quote character, we toggle 312 * quote state. 313 * Otherwise: check the current character for NUL, or 314 * being in delim, and end the string if either is true. 315 */ 316 if (*srcptr == '\\') { 317 srcptr++; 318 /* 319 * The edge case here is if the next character 320 * is NUL, we want to stop processing. But if 321 * it's not NUL, then we simply want to copy it. 322 */ 323 if (*srcptr) { 324 *dstptr++ = *srcptr++; 325 } 326 continue; 327 } 328 if (quot == 0 && (*srcptr == '\'' || *srcptr == '"')) { 329 quot = *srcptr++; 330 continue; 331 } 332 if (quot && *srcptr == quot) { 333 /* End of the quoted part */ 334 quot = 0; 335 srcptr++; 336 continue; 337 } 338 if (!quot && strchr(delim, *srcptr)) 339 break; 340 *dstptr++ = *srcptr++; 341 } 342 343 *dstptr = 0; /* Terminate the string */ 344 *stringp = (*srcptr == '\0') ? NULL : srcptr + 1; 345 return (retval); 346} 347 348/* 349 * Mountd server for NFS mount protocol as described in: 350 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 351 * The optional arguments are the exports file name 352 * default: _PATH_EXPORTS 353 * and "-n" to allow nonroot mount. 354 */ 355int 356main(int argc, char **argv) 357{ 358 fd_set readfds; 359 struct netconfig *nconf; 360 char *endptr, **hosts_bak; 361 void *nc_handle; 362 pid_t otherpid; 363 in_port_t svcport; 364 int c, k, s; 365 int maxrec = RPC_MAXDATASIZE; 366 int attempt_cnt, port_len, port_pos, ret; 367 char **port_list; 368 369 /* Check that another mountd isn't already running. */ 370 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 371 if (pfh == NULL) { 372 if (errno == EEXIST) 373 errx(1, "mountd already running, pid: %d.", otherpid); 374 warn("cannot open or create pidfile"); 375 } 376 377 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 378 if (s < 0) 379 have_v6 = 0; 380 else 381 close(s); 382 383 while ((c = getopt(argc, argv, "2deh:lnop:rS")) != -1) 384 switch (c) { 385 case '2': 386 force_v2 = 1; 387 break; 388 case 'e': 389 /* now a no-op, since this is the default */ 390 break; 391 case 'n': 392 resvport_only = 0; 393 break; 394 case 'r': 395 dir_only = 0; 396 break; 397 case 'd': 398 debug = debug ? 0 : 1; 399 break; 400 case 'l': 401 dolog = 1; 402 break; 403 case 'o': 404 run_v4server = 0; 405 break; 406 case 'p': 407 endptr = NULL; 408 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 409 if (endptr == NULL || *endptr != '\0' || 410 svcport == 0 || svcport >= IPPORT_MAX) 411 usage(); 412 svcport_str = strdup(optarg); 413 break; 414 case 'h': 415 ++nhosts; 416 hosts_bak = hosts; 417 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 418 if (hosts_bak == NULL) { 419 if (hosts != NULL) { 420 for (k = 0; k < nhosts; k++) 421 free(hosts[k]); 422 free(hosts); 423 out_of_mem(); 424 } 425 } 426 hosts = hosts_bak; 427 hosts[nhosts - 1] = strdup(optarg); 428 if (hosts[nhosts - 1] == NULL) { 429 for (k = 0; k < (nhosts - 1); k++) 430 free(hosts[k]); 431 free(hosts); 432 out_of_mem(); 433 } 434 break; 435 case 'S': 436 suspend_nfsd = 1; 437 break; 438 default: 439 usage(); 440 }; 441 442 /* 443 * Unless the "-o" option was specified, try and run "nfsd". 444 * If "-o" was specified, try and run "nfsserver". 445 */ 446 if (run_v4server > 0) { 447 if (modfind("nfsd") < 0) { 448 /* Not present in kernel, try loading it */ 449 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 450 errx(1, "NFS server is not available"); 451 } 452 } else if (modfind("nfsserver") < 0) { 453 /* Not present in kernel, try loading it */ 454 if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0) 455 errx(1, "NFS server is not available"); 456 } 457 458 argc -= optind; 459 argv += optind; 460 grphead = (struct grouplist *)NULL; 461 exphead = (struct exportlist *)NULL; 462 mlhead = (struct mountlist *)NULL; 463 if (argc > 0) 464 exnames = argv; 465 else 466 exnames = exnames_default; 467 openlog("mountd", LOG_PID, LOG_DAEMON); 468 if (debug) 469 warnx("getting export list"); 470 get_exportlist(); 471 if (debug) 472 warnx("getting mount list"); 473 get_mountlist(); 474 if (debug) 475 warnx("here we go"); 476 if (debug == 0) { 477 daemon(0, 0); 478 signal(SIGINT, SIG_IGN); 479 signal(SIGQUIT, SIG_IGN); 480 } 481 signal(SIGHUP, huphandler); 482 signal(SIGTERM, terminate); 483 signal(SIGPIPE, SIG_IGN); 484 485 pidfile_write(pfh); 486 487 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 488 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 489 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 490 491 if (!resvport_only) { 492 if (run_v4server != 0) { 493 if (sysctlbyname("vfs.nfsd.nfs_privport", NULL, NULL, 494 &resvport_only, sizeof(resvport_only)) != 0 && 495 errno != ENOENT) { 496 syslog(LOG_ERR, "sysctl: %m"); 497 exit(1); 498 } 499 } else { 500 if (sysctlbyname("vfs.nfsrv.nfs_privport", NULL, NULL, 501 &resvport_only, sizeof(resvport_only)) != 0 && 502 errno != ENOENT) { 503 syslog(LOG_ERR, "sysctl: %m"); 504 exit(1); 505 } 506 } 507 } 508 509 /* 510 * If no hosts were specified, add a wildcard entry to bind to 511 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the 512 * list. 513 */ 514 if (nhosts == 0) { 515 hosts = malloc(sizeof(char**)); 516 if (hosts == NULL) 517 out_of_mem(); 518 hosts[0] = "*"; 519 nhosts = 1; 520 } else { 521 hosts_bak = hosts; 522 if (have_v6) { 523 hosts_bak = realloc(hosts, (nhosts + 2) * 524 sizeof(char *)); 525 if (hosts_bak == NULL) { 526 for (k = 0; k < nhosts; k++) 527 free(hosts[k]); 528 free(hosts); 529 out_of_mem(); 530 } else 531 hosts = hosts_bak; 532 nhosts += 2; 533 hosts[nhosts - 2] = "::1"; 534 } else { 535 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *)); 536 if (hosts_bak == NULL) { 537 for (k = 0; k < nhosts; k++) 538 free(hosts[k]); 539 free(hosts); 540 out_of_mem(); 541 } else { 542 nhosts += 1; 543 hosts = hosts_bak; 544 } 545 } 546 547 hosts[nhosts - 1] = "127.0.0.1"; 548 } 549 550 attempt_cnt = 1; 551 sock_fdcnt = 0; 552 sock_fd = NULL; 553 port_list = NULL; 554 port_len = 0; 555 nc_handle = setnetconfig(); 556 while ((nconf = getnetconfig(nc_handle))) { 557 if (nconf->nc_flag & NC_VISIBLE) { 558 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 559 "inet6") == 0) { 560 /* DO NOTHING */ 561 } else { 562 ret = create_service(nconf); 563 if (ret == 1) 564 /* Ignore this call */ 565 continue; 566 if (ret < 0) { 567 /* 568 * Failed to bind port, so close off 569 * all sockets created and try again 570 * if the port# was dynamically 571 * assigned via bind(2). 572 */ 573 clearout_service(); 574 if (mallocd_svcport != 0 && 575 attempt_cnt < GETPORT_MAXTRY) { 576 free(svcport_str); 577 svcport_str = NULL; 578 mallocd_svcport = 0; 579 } else { 580 errno = EADDRINUSE; 581 syslog(LOG_ERR, 582 "bindresvport_sa: %m"); 583 exit(1); 584 } 585 586 /* Start over at the first service. */ 587 free(sock_fd); 588 sock_fdcnt = 0; 589 sock_fd = NULL; 590 nc_handle = setnetconfig(); 591 attempt_cnt++; 592 } else if (mallocd_svcport != 0 && 593 attempt_cnt == GETPORT_MAXTRY) { 594 /* 595 * For the last attempt, allow 596 * different port #s for each nconf 597 * by saving the svcport_str and 598 * setting it back to NULL. 599 */ 600 port_list = realloc(port_list, 601 (port_len + 1) * sizeof(char *)); 602 if (port_list == NULL) 603 out_of_mem(); 604 port_list[port_len++] = svcport_str; 605 svcport_str = NULL; 606 mallocd_svcport = 0; 607 } 608 } 609 } 610 } 611 612 /* 613 * Successfully bound the ports, so call complete_service() to 614 * do the rest of the setup on the service(s). 615 */ 616 sock_fdpos = 0; 617 port_pos = 0; 618 nc_handle = setnetconfig(); 619 while ((nconf = getnetconfig(nc_handle))) { 620 if (nconf->nc_flag & NC_VISIBLE) { 621 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 622 "inet6") == 0) { 623 /* DO NOTHING */ 624 } else if (port_list != NULL) { 625 if (port_pos >= port_len) { 626 syslog(LOG_ERR, "too many port#s"); 627 exit(1); 628 } 629 complete_service(nconf, port_list[port_pos++]); 630 } else 631 complete_service(nconf, svcport_str); 632 } 633 } 634 endnetconfig(nc_handle); 635 free(sock_fd); 636 if (port_list != NULL) { 637 for (port_pos = 0; port_pos < port_len; port_pos++) 638 free(port_list[port_pos]); 639 free(port_list); 640 } 641 642 if (xcreated == 0) { 643 syslog(LOG_ERR, "could not create any services"); 644 exit(1); 645 } 646 647 /* Expand svc_run() here so that we can call get_exportlist(). */ 648 for (;;) { 649 if (got_sighup) { 650 get_exportlist(); 651 got_sighup = 0; 652 } 653 readfds = svc_fdset; 654 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) { 655 case -1: 656 if (errno == EINTR) 657 continue; 658 syslog(LOG_ERR, "mountd died: select: %m"); 659 exit(1); 660 case 0: 661 continue; 662 default: 663 svc_getreqset(&readfds); 664 } 665 } 666} 667 668/* 669 * This routine creates and binds sockets on the appropriate 670 * addresses. It gets called one time for each transport. 671 * It returns 0 upon success, 1 for ingore the call and -1 to indicate 672 * bind failed with EADDRINUSE. 673 * Any file descriptors that have been created are stored in sock_fd and 674 * the total count of them is maintained in sock_fdcnt. 675 */ 676static int 677create_service(struct netconfig *nconf) 678{ 679 struct addrinfo hints, *res = NULL; 680 struct sockaddr_in *sin; 681 struct sockaddr_in6 *sin6; 682 struct __rpc_sockinfo si; 683 int aicode; 684 int fd; 685 int nhostsbak; 686 int one = 1; 687 int r; 688 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 689 int mallocd_res; 690 691 if ((nconf->nc_semantics != NC_TPI_CLTS) && 692 (nconf->nc_semantics != NC_TPI_COTS) && 693 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 694 return (1); /* not my type */ 695 696 /* 697 * XXX - using RPC library internal functions. 698 */ 699 if (!__rpc_nconf2sockinfo(nconf, &si)) { 700 syslog(LOG_ERR, "cannot get information for %s", 701 nconf->nc_netid); 702 return (1); 703 } 704 705 /* Get mountd's address on this transport */ 706 memset(&hints, 0, sizeof hints); 707 hints.ai_family = si.si_af; 708 hints.ai_socktype = si.si_socktype; 709 hints.ai_protocol = si.si_proto; 710 711 /* 712 * Bind to specific IPs if asked to 713 */ 714 nhostsbak = nhosts; 715 while (nhostsbak > 0) { 716 --nhostsbak; 717 sock_fd = realloc(sock_fd, (sock_fdcnt + 1) * sizeof(int)); 718 if (sock_fd == NULL) 719 out_of_mem(); 720 sock_fd[sock_fdcnt++] = -1; /* Set invalid for now. */ 721 mallocd_res = 0; 722 723 hints.ai_flags = AI_PASSIVE; 724 725 /* 726 * XXX - using RPC library internal functions. 727 */ 728 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 729 int non_fatal = 0; 730 if (errno == EAFNOSUPPORT && 731 nconf->nc_semantics != NC_TPI_CLTS) 732 non_fatal = 1; 733 734 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 735 "cannot create socket for %s", nconf->nc_netid); 736 if (non_fatal != 0) 737 continue; 738 exit(1); 739 } 740 741 switch (hints.ai_family) { 742 case AF_INET: 743 if (inet_pton(AF_INET, hosts[nhostsbak], 744 host_addr) == 1) { 745 hints.ai_flags |= AI_NUMERICHOST; 746 } else { 747 /* 748 * Skip if we have an AF_INET6 address. 749 */ 750 if (inet_pton(AF_INET6, hosts[nhostsbak], 751 host_addr) == 1) { 752 close(fd); 753 continue; 754 } 755 } 756 break; 757 case AF_INET6: 758 if (inet_pton(AF_INET6, hosts[nhostsbak], 759 host_addr) == 1) { 760 hints.ai_flags |= AI_NUMERICHOST; 761 } else { 762 /* 763 * Skip if we have an AF_INET address. 764 */ 765 if (inet_pton(AF_INET, hosts[nhostsbak], 766 host_addr) == 1) { 767 close(fd); 768 continue; 769 } 770 } 771 772 /* 773 * We're doing host-based access checks here, so don't 774 * allow v4-in-v6 to confuse things. The kernel will 775 * disable it by default on NFS sockets too. 776 */ 777 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 778 sizeof one) < 0) { 779 syslog(LOG_ERR, 780 "can't disable v4-in-v6 on IPv6 socket"); 781 exit(1); 782 } 783 break; 784 default: 785 break; 786 } 787 788 /* 789 * If no hosts were specified, just bind to INADDR_ANY 790 */ 791 if (strcmp("*", hosts[nhostsbak]) == 0) { 792 if (svcport_str == NULL) { 793 res = malloc(sizeof(struct addrinfo)); 794 if (res == NULL) 795 out_of_mem(); 796 mallocd_res = 1; 797 res->ai_flags = hints.ai_flags; 798 res->ai_family = hints.ai_family; 799 res->ai_protocol = hints.ai_protocol; 800 switch (res->ai_family) { 801 case AF_INET: 802 sin = malloc(sizeof(struct sockaddr_in)); 803 if (sin == NULL) 804 out_of_mem(); 805 sin->sin_family = AF_INET; 806 sin->sin_port = htons(0); 807 sin->sin_addr.s_addr = htonl(INADDR_ANY); 808 res->ai_addr = (struct sockaddr*) sin; 809 res->ai_addrlen = (socklen_t) 810 sizeof(struct sockaddr_in); 811 break; 812 case AF_INET6: 813 sin6 = malloc(sizeof(struct sockaddr_in6)); 814 if (sin6 == NULL) 815 out_of_mem(); 816 sin6->sin6_family = AF_INET6; 817 sin6->sin6_port = htons(0); 818 sin6->sin6_addr = in6addr_any; 819 res->ai_addr = (struct sockaddr*) sin6; 820 res->ai_addrlen = (socklen_t) 821 sizeof(struct sockaddr_in6); 822 break; 823 default: 824 syslog(LOG_ERR, "bad addr fam %d", 825 res->ai_family); 826 exit(1); 827 } 828 } else { 829 if ((aicode = getaddrinfo(NULL, svcport_str, 830 &hints, &res)) != 0) { 831 syslog(LOG_ERR, 832 "cannot get local address for %s: %s", 833 nconf->nc_netid, 834 gai_strerror(aicode)); 835 close(fd); 836 continue; 837 } 838 } 839 } else { 840 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 841 &hints, &res)) != 0) { 842 syslog(LOG_ERR, 843 "cannot get local address for %s: %s", 844 nconf->nc_netid, gai_strerror(aicode)); 845 close(fd); 846 continue; 847 } 848 } 849 850 /* Store the fd. */ 851 sock_fd[sock_fdcnt - 1] = fd; 852 853 /* Now, attempt the bind. */ 854 r = bindresvport_sa(fd, res->ai_addr); 855 if (r != 0) { 856 if (errno == EADDRINUSE && mallocd_svcport != 0) { 857 if (mallocd_res != 0) { 858 free(res->ai_addr); 859 free(res); 860 } else 861 freeaddrinfo(res); 862 return (-1); 863 } 864 syslog(LOG_ERR, "bindresvport_sa: %m"); 865 exit(1); 866 } 867 868 if (svcport_str == NULL) { 869 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 870 if (svcport_str == NULL) 871 out_of_mem(); 872 mallocd_svcport = 1; 873 874 if (getnameinfo(res->ai_addr, 875 res->ai_addr->sa_len, NULL, NI_MAXHOST, 876 svcport_str, NI_MAXSERV * sizeof(char), 877 NI_NUMERICHOST | NI_NUMERICSERV)) 878 errx(1, "Cannot get port number"); 879 } 880 if (mallocd_res != 0) { 881 free(res->ai_addr); 882 free(res); 883 } else 884 freeaddrinfo(res); 885 res = NULL; 886 } 887 return (0); 888} 889 890/* 891 * Called after all the create_service() calls have succeeded, to complete 892 * the setup and registration. 893 */ 894static void 895complete_service(struct netconfig *nconf, char *port_str) 896{ 897 struct addrinfo hints, *res = NULL; 898 struct __rpc_sockinfo si; 899 struct netbuf servaddr; 900 SVCXPRT *transp = NULL; 901 int aicode, fd, nhostsbak; 902 int registered = 0; 903 904 if ((nconf->nc_semantics != NC_TPI_CLTS) && 905 (nconf->nc_semantics != NC_TPI_COTS) && 906 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 907 return; /* not my type */ 908 909 /* 910 * XXX - using RPC library internal functions. 911 */ 912 if (!__rpc_nconf2sockinfo(nconf, &si)) { 913 syslog(LOG_ERR, "cannot get information for %s", 914 nconf->nc_netid); 915 return; 916 } 917 918 nhostsbak = nhosts; 919 while (nhostsbak > 0) { 920 --nhostsbak; 921 if (sock_fdpos >= sock_fdcnt) { 922 /* Should never happen. */ 923 syslog(LOG_ERR, "Ran out of socket fd's"); 924 return; 925 } 926 fd = sock_fd[sock_fdpos++]; 927 if (fd < 0) 928 continue; 929 930 if (nconf->nc_semantics != NC_TPI_CLTS) 931 listen(fd, SOMAXCONN); 932 933 if (nconf->nc_semantics == NC_TPI_CLTS ) 934 transp = svc_dg_create(fd, 0, 0); 935 else 936 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 937 RPC_MAXDATASIZE); 938 939 if (transp != (SVCXPRT *) NULL) { 940 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS, mntsrv, 941 NULL)) 942 syslog(LOG_ERR, 943 "can't register %s MOUNTVERS service", 944 nconf->nc_netid); 945 if (!force_v2) { 946 if (!svc_reg(transp, MOUNTPROG, MOUNTVERS3, 947 mntsrv, NULL)) 948 syslog(LOG_ERR, 949 "can't register %s MOUNTVERS3 service", 950 nconf->nc_netid); 951 } 952 } else 953 syslog(LOG_WARNING, "can't create %s services", 954 nconf->nc_netid); 955 956 if (registered == 0) { 957 registered = 1; 958 memset(&hints, 0, sizeof hints); 959 hints.ai_flags = AI_PASSIVE; 960 hints.ai_family = si.si_af; 961 hints.ai_socktype = si.si_socktype; 962 hints.ai_protocol = si.si_proto; 963 964 if ((aicode = getaddrinfo(NULL, port_str, &hints, 965 &res)) != 0) { 966 syslog(LOG_ERR, "cannot get local address: %s", 967 gai_strerror(aicode)); 968 exit(1); 969 } 970 971 servaddr.buf = malloc(res->ai_addrlen); 972 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 973 servaddr.len = res->ai_addrlen; 974 975 rpcb_set(MOUNTPROG, MOUNTVERS, nconf, &servaddr); 976 rpcb_set(MOUNTPROG, MOUNTVERS3, nconf, &servaddr); 977 978 xcreated++; 979 freeaddrinfo(res); 980 } 981 } /* end while */ 982} 983 984/* 985 * Clear out sockets after a failure to bind one of them, so that the 986 * cycle of socket creation/binding can start anew. 987 */ 988static void 989clearout_service(void) 990{ 991 int i; 992 993 for (i = 0; i < sock_fdcnt; i++) { 994 if (sock_fd[i] >= 0) { 995 shutdown(sock_fd[i], SHUT_RDWR); 996 close(sock_fd[i]); 997 } 998 } 999} 1000 1001static void 1002usage(void) 1003{ 1004 fprintf(stderr, 1005 "usage: mountd [-2] [-d] [-e] [-l] [-n] [-p <port>] [-r] " 1006 "[-S] [-h <bindip>] [export_file ...]\n"); 1007 exit(1); 1008} 1009 1010/* 1011 * The mount rpc service 1012 */ 1013void 1014mntsrv(struct svc_req *rqstp, SVCXPRT *transp) 1015{ 1016 struct exportlist *ep; 1017 struct dirlist *dp; 1018 struct fhreturn fhr; 1019 struct stat stb; 1020 struct statfs fsb; 1021 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 1022 int lookup_failed = 1; 1023 struct sockaddr *saddr; 1024 u_short sport; 1025 char rpcpath[MNTPATHLEN + 1], dirpath[MAXPATHLEN]; 1026 int bad = 0, defset, hostset; 1027 sigset_t sighup_mask; 1028 int numsecflavors, *secflavorsp; 1029 1030 sigemptyset(&sighup_mask); 1031 sigaddset(&sighup_mask, SIGHUP); 1032 saddr = svc_getrpccaller(transp)->buf; 1033 switch (saddr->sa_family) { 1034 case AF_INET6: 1035 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 1036 break; 1037 case AF_INET: 1038 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 1039 break; 1040 default: 1041 syslog(LOG_ERR, "request from unknown address family"); 1042 return; 1043 } 1044 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host, 1045 NULL, 0, 0); 1046 getnameinfo(saddr, saddr->sa_len, numerichost, 1047 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 1048 switch (rqstp->rq_proc) { 1049 case NULLPROC: 1050 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 1051 syslog(LOG_ERR, "can't send reply"); 1052 return; 1053 case MOUNTPROC_MNT: 1054 if (sport >= IPPORT_RESERVED && resvport_only) { 1055 syslog(LOG_NOTICE, 1056 "mount request from %s from unprivileged port", 1057 numerichost); 1058 svcerr_weakauth(transp); 1059 return; 1060 } 1061 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1062 syslog(LOG_NOTICE, "undecodable mount request from %s", 1063 numerichost); 1064 svcerr_decode(transp); 1065 return; 1066 } 1067 1068 /* 1069 * Get the real pathname and make sure it is a directory 1070 * or a regular file if the -r option was specified 1071 * and it exists. 1072 */ 1073 if (realpath(rpcpath, dirpath) == NULL || 1074 stat(dirpath, &stb) < 0 || 1075 (!S_ISDIR(stb.st_mode) && 1076 (dir_only || !S_ISREG(stb.st_mode))) || 1077 statfs(dirpath, &fsb) < 0) { 1078 chdir("/"); /* Just in case realpath doesn't */ 1079 syslog(LOG_NOTICE, 1080 "mount request from %s for non existent path %s", 1081 numerichost, dirpath); 1082 if (debug) 1083 warnx("stat failed on %s", dirpath); 1084 bad = ENOENT; /* We will send error reply later */ 1085 } 1086 1087 /* Check in the exports list */ 1088 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1089 ep = ex_search(&fsb.f_fsid); 1090 hostset = defset = 0; 1091 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset, 1092 &numsecflavors, &secflavorsp) || 1093 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 1094 chk_host(dp, saddr, &defset, &hostset, &numsecflavors, 1095 &secflavorsp)) || 1096 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 1097 scan_tree(ep->ex_dirl, saddr) == 0))) { 1098 if (bad) { 1099 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1100 (caddr_t)&bad)) 1101 syslog(LOG_ERR, "can't send reply"); 1102 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1103 return; 1104 } 1105 if (hostset & DP_HOSTSET) { 1106 fhr.fhr_flag = hostset; 1107 fhr.fhr_numsecflavors = numsecflavors; 1108 fhr.fhr_secflavors = secflavorsp; 1109 } else { 1110 fhr.fhr_flag = defset; 1111 fhr.fhr_numsecflavors = ep->ex_defnumsecflavors; 1112 fhr.fhr_secflavors = ep->ex_defsecflavors; 1113 } 1114 fhr.fhr_vers = rqstp->rq_vers; 1115 /* Get the file handle */ 1116 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 1117 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 1118 bad = errno; 1119 syslog(LOG_ERR, "can't get fh for %s", dirpath); 1120 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 1121 (caddr_t)&bad)) 1122 syslog(LOG_ERR, "can't send reply"); 1123 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1124 return; 1125 } 1126 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, 1127 (caddr_t)&fhr)) 1128 syslog(LOG_ERR, "can't send reply"); 1129 if (!lookup_failed) 1130 add_mlist(host, dirpath); 1131 else 1132 add_mlist(numerichost, dirpath); 1133 if (debug) 1134 warnx("mount successful"); 1135 if (dolog) 1136 syslog(LOG_NOTICE, 1137 "mount request succeeded from %s for %s", 1138 numerichost, dirpath); 1139 } else { 1140 bad = EACCES; 1141 syslog(LOG_NOTICE, 1142 "mount request denied from %s for %s", 1143 numerichost, dirpath); 1144 } 1145 1146 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, 1147 (caddr_t)&bad)) 1148 syslog(LOG_ERR, "can't send reply"); 1149 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1150 return; 1151 case MOUNTPROC_DUMP: 1152 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL)) 1153 syslog(LOG_ERR, "can't send reply"); 1154 else if (dolog) 1155 syslog(LOG_NOTICE, 1156 "dump request succeeded from %s", 1157 numerichost); 1158 return; 1159 case MOUNTPROC_UMNT: 1160 if (sport >= IPPORT_RESERVED && resvport_only) { 1161 syslog(LOG_NOTICE, 1162 "umount request from %s from unprivileged port", 1163 numerichost); 1164 svcerr_weakauth(transp); 1165 return; 1166 } 1167 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 1168 syslog(LOG_NOTICE, "undecodable umount request from %s", 1169 numerichost); 1170 svcerr_decode(transp); 1171 return; 1172 } 1173 if (realpath(rpcpath, dirpath) == NULL) { 1174 syslog(LOG_NOTICE, "umount request from %s " 1175 "for non existent path %s", 1176 numerichost, dirpath); 1177 } 1178 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1179 syslog(LOG_ERR, "can't send reply"); 1180 if (!lookup_failed) 1181 del_mlist(host, dirpath); 1182 del_mlist(numerichost, dirpath); 1183 if (dolog) 1184 syslog(LOG_NOTICE, 1185 "umount request succeeded from %s for %s", 1186 numerichost, dirpath); 1187 return; 1188 case MOUNTPROC_UMNTALL: 1189 if (sport >= IPPORT_RESERVED && resvport_only) { 1190 syslog(LOG_NOTICE, 1191 "umountall request from %s from unprivileged port", 1192 numerichost); 1193 svcerr_weakauth(transp); 1194 return; 1195 } 1196 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 1197 syslog(LOG_ERR, "can't send reply"); 1198 if (!lookup_failed) 1199 del_mlist(host, NULL); 1200 del_mlist(numerichost, NULL); 1201 if (dolog) 1202 syslog(LOG_NOTICE, 1203 "umountall request succeeded from %s", 1204 numerichost); 1205 return; 1206 case MOUNTPROC_EXPORT: 1207 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL)) 1208 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, 1209 (caddr_t)NULL)) 1210 syslog(LOG_ERR, "can't send reply"); 1211 if (dolog) 1212 syslog(LOG_NOTICE, 1213 "export request succeeded from %s", 1214 numerichost); 1215 return; 1216 default: 1217 svcerr_noproc(transp); 1218 return; 1219 } 1220} 1221 1222/* 1223 * Xdr conversion for a dirpath string 1224 */ 1225int 1226xdr_dir(XDR *xdrsp, char *dirp) 1227{ 1228 return (xdr_string(xdrsp, &dirp, MNTPATHLEN)); 1229} 1230 1231/* 1232 * Xdr routine to generate file handle reply 1233 */ 1234int 1235xdr_fhs(XDR *xdrsp, caddr_t cp) 1236{ 1237 struct fhreturn *fhrp = (struct fhreturn *)cp; 1238 u_long ok = 0, len, auth; 1239 int i; 1240 1241 if (!xdr_long(xdrsp, &ok)) 1242 return (0); 1243 switch (fhrp->fhr_vers) { 1244 case 1: 1245 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 1246 case 3: 1247 len = NFSX_V3FH; 1248 if (!xdr_long(xdrsp, &len)) 1249 return (0); 1250 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 1251 return (0); 1252 if (fhrp->fhr_numsecflavors) { 1253 if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors)) 1254 return (0); 1255 for (i = 0; i < fhrp->fhr_numsecflavors; i++) 1256 if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i])) 1257 return (0); 1258 return (1); 1259 } else { 1260 auth = AUTH_SYS; 1261 len = 1; 1262 if (!xdr_long(xdrsp, &len)) 1263 return (0); 1264 return (xdr_long(xdrsp, &auth)); 1265 } 1266 }; 1267 return (0); 1268} 1269 1270int 1271xdr_mlist(XDR *xdrsp, caddr_t cp __unused) 1272{ 1273 struct mountlist *mlp; 1274 int true = 1; 1275 int false = 0; 1276 char *strp; 1277 1278 mlp = mlhead; 1279 while (mlp) { 1280 if (!xdr_bool(xdrsp, &true)) 1281 return (0); 1282 strp = &mlp->ml_host[0]; 1283 if (!xdr_string(xdrsp, &strp, MNTNAMLEN)) 1284 return (0); 1285 strp = &mlp->ml_dirp[0]; 1286 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1287 return (0); 1288 mlp = mlp->ml_next; 1289 } 1290 if (!xdr_bool(xdrsp, &false)) 1291 return (0); 1292 return (1); 1293} 1294 1295/* 1296 * Xdr conversion for export list 1297 */ 1298int 1299xdr_explist_common(XDR *xdrsp, caddr_t cp __unused, int brief) 1300{ 1301 struct exportlist *ep; 1302 int false = 0; 1303 int putdef; 1304 sigset_t sighup_mask; 1305 1306 sigemptyset(&sighup_mask); 1307 sigaddset(&sighup_mask, SIGHUP); 1308 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1309 ep = exphead; 1310 while (ep) { 1311 putdef = 0; 1312 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 1313 &putdef, brief)) 1314 goto errout; 1315 if (ep->ex_defdir && putdef == 0 && 1316 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL, 1317 &putdef, brief)) 1318 goto errout; 1319 ep = ep->ex_next; 1320 } 1321 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1322 if (!xdr_bool(xdrsp, &false)) 1323 return (0); 1324 return (1); 1325errout: 1326 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1327 return (0); 1328} 1329 1330/* 1331 * Called from xdr_explist() to traverse the tree and export the 1332 * directory paths. 1333 */ 1334int 1335put_exlist(struct dirlist *dp, XDR *xdrsp, struct dirlist *adp, int *putdefp, 1336 int brief) 1337{ 1338 struct grouplist *grp; 1339 struct hostlist *hp; 1340 int true = 1; 1341 int false = 0; 1342 int gotalldir = 0; 1343 char *strp; 1344 1345 if (dp) { 1346 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1347 return (1); 1348 if (!xdr_bool(xdrsp, &true)) 1349 return (1); 1350 strp = dp->dp_dirp; 1351 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1352 return (1); 1353 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1354 gotalldir = 1; 1355 *putdefp = 1; 1356 } 1357 if (brief) { 1358 if (!xdr_bool(xdrsp, &true)) 1359 return (1); 1360 strp = "(...)"; 1361 if (!xdr_string(xdrsp, &strp, MNTPATHLEN)) 1362 return (1); 1363 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1364 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1365 hp = dp->dp_hosts; 1366 while (hp) { 1367 grp = hp->ht_grp; 1368 if (grp->gr_type == GT_HOST) { 1369 if (!xdr_bool(xdrsp, &true)) 1370 return (1); 1371 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1372 if (!xdr_string(xdrsp, &strp, 1373 MNTNAMLEN)) 1374 return (1); 1375 } else if (grp->gr_type == GT_NET) { 1376 if (!xdr_bool(xdrsp, &true)) 1377 return (1); 1378 strp = grp->gr_ptr.gt_net.nt_name; 1379 if (!xdr_string(xdrsp, &strp, 1380 MNTNAMLEN)) 1381 return (1); 1382 } 1383 hp = hp->ht_next; 1384 if (gotalldir && hp == (struct hostlist *)NULL) { 1385 hp = adp->dp_hosts; 1386 gotalldir = 0; 1387 } 1388 } 1389 } 1390 if (!xdr_bool(xdrsp, &false)) 1391 return (1); 1392 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1393 return (1); 1394 } 1395 return (0); 1396} 1397 1398int 1399xdr_explist(XDR *xdrsp, caddr_t cp) 1400{ 1401 1402 return xdr_explist_common(xdrsp, cp, 0); 1403} 1404 1405int 1406xdr_explist_brief(XDR *xdrsp, caddr_t cp) 1407{ 1408 1409 return xdr_explist_common(xdrsp, cp, 1); 1410} 1411 1412char *line; 1413int linesize; 1414FILE *exp_file; 1415 1416/* 1417 * Get the export list from one, currently open file 1418 */ 1419static void 1420get_exportlist_one(void) 1421{ 1422 struct exportlist *ep, *ep2; 1423 struct grouplist *grp, *tgrp; 1424 struct exportlist **epp; 1425 struct dirlist *dirhead; 1426 struct statfs fsb; 1427 struct xucred anon; 1428 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1429 int len, has_host, exflags, got_nondir, dirplen, netgrp; 1430 1431 v4root_phase = 0; 1432 dirhead = (struct dirlist *)NULL; 1433 while (get_line()) { 1434 if (debug) 1435 warnx("got line %s", line); 1436 cp = line; 1437 nextfield(&cp, &endcp); 1438 if (*cp == '#') 1439 goto nextline; 1440 1441 /* 1442 * Set defaults. 1443 */ 1444 has_host = FALSE; 1445 anon = def_anon; 1446 exflags = MNT_EXPORTED; 1447 got_nondir = 0; 1448 opt_flags = 0; 1449 ep = (struct exportlist *)NULL; 1450 dirp = NULL; 1451 1452 /* 1453 * Handle the V4 root dir. 1454 */ 1455 if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') { 1456 /* 1457 * V4: just indicates that it is the v4 root point, 1458 * so skip over that and set v4root_phase. 1459 */ 1460 if (v4root_phase > 0) { 1461 syslog(LOG_ERR, "V4:duplicate line, ignored"); 1462 goto nextline; 1463 } 1464 v4root_phase = 1; 1465 cp += 3; 1466 nextfield(&cp, &endcp); 1467 } 1468 1469 /* 1470 * Create new exports list entry 1471 */ 1472 len = endcp-cp; 1473 tgrp = grp = get_grp(); 1474 while (len > 0) { 1475 if (len > MNTNAMLEN) { 1476 getexp_err(ep, tgrp); 1477 goto nextline; 1478 } 1479 if (*cp == '-') { 1480 if (ep == (struct exportlist *)NULL) { 1481 getexp_err(ep, tgrp); 1482 goto nextline; 1483 } 1484 if (debug) 1485 warnx("doing opt %s", cp); 1486 got_nondir = 1; 1487 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1488 &exflags, &anon)) { 1489 getexp_err(ep, tgrp); 1490 goto nextline; 1491 } 1492 } else if (*cp == '/') { 1493 savedc = *endcp; 1494 *endcp = '\0'; 1495 if (v4root_phase > 1) { 1496 if (dirp != NULL) { 1497 syslog(LOG_ERR, "Multiple V4 dirs"); 1498 getexp_err(ep, tgrp); 1499 goto nextline; 1500 } 1501 } 1502 if (check_dirpath(cp) && 1503 statfs(cp, &fsb) >= 0) { 1504 if ((fsb.f_flags & MNT_AUTOMOUNTED) != 0) 1505 syslog(LOG_ERR, "Warning: exporting of " 1506 "automounted fs %s not supported", cp); 1507 if (got_nondir) { 1508 syslog(LOG_ERR, "dirs must be first"); 1509 getexp_err(ep, tgrp); 1510 goto nextline; 1511 } 1512 if (v4root_phase == 1) { 1513 if (dirp != NULL) { 1514 syslog(LOG_ERR, "Multiple V4 dirs"); 1515 getexp_err(ep, tgrp); 1516 goto nextline; 1517 } 1518 if (strlen(v4root_dirpath) == 0) { 1519 strlcpy(v4root_dirpath, cp, 1520 sizeof (v4root_dirpath)); 1521 } else if (strcmp(v4root_dirpath, cp) 1522 != 0) { 1523 syslog(LOG_ERR, 1524 "different V4 dirpath %s", cp); 1525 getexp_err(ep, tgrp); 1526 goto nextline; 1527 } 1528 dirp = cp; 1529 v4root_phase = 2; 1530 got_nondir = 1; 1531 ep = get_exp(); 1532 } else { 1533 if (ep) { 1534 if (ep->ex_fs.val[0] != 1535 fsb.f_fsid.val[0] || 1536 ep->ex_fs.val[1] != 1537 fsb.f_fsid.val[1]) { 1538 getexp_err(ep, tgrp); 1539 goto nextline; 1540 } 1541 } else { 1542 /* 1543 * See if this directory is already 1544 * in the list. 1545 */ 1546 ep = ex_search(&fsb.f_fsid); 1547 if (ep == (struct exportlist *)NULL) { 1548 ep = get_exp(); 1549 ep->ex_fs = fsb.f_fsid; 1550 ep->ex_fsdir = (char *)malloc 1551 (strlen(fsb.f_mntonname) + 1); 1552 if (ep->ex_fsdir) 1553 strcpy(ep->ex_fsdir, 1554 fsb.f_mntonname); 1555 else 1556 out_of_mem(); 1557 if (debug) 1558 warnx( 1559 "making new ep fs=0x%x,0x%x", 1560 fsb.f_fsid.val[0], 1561 fsb.f_fsid.val[1]); 1562 } else if (debug) 1563 warnx("found ep fs=0x%x,0x%x", 1564 fsb.f_fsid.val[0], 1565 fsb.f_fsid.val[1]); 1566 } 1567 1568 /* 1569 * Add dirpath to export mount point. 1570 */ 1571 dirp = add_expdir(&dirhead, cp, len); 1572 dirplen = len; 1573 } 1574 } else { 1575 getexp_err(ep, tgrp); 1576 goto nextline; 1577 } 1578 *endcp = savedc; 1579 } else { 1580 savedc = *endcp; 1581 *endcp = '\0'; 1582 got_nondir = 1; 1583 if (ep == (struct exportlist *)NULL) { 1584 getexp_err(ep, tgrp); 1585 goto nextline; 1586 } 1587 1588 /* 1589 * Get the host or netgroup. 1590 */ 1591 setnetgrent(cp); 1592 netgrp = getnetgrent(&hst, &usr, &dom); 1593 do { 1594 if (has_host) { 1595 grp->gr_next = get_grp(); 1596 grp = grp->gr_next; 1597 } 1598 if (netgrp) { 1599 if (hst == 0) { 1600 syslog(LOG_ERR, 1601 "null hostname in netgroup %s, skipping", cp); 1602 grp->gr_type = GT_IGNORE; 1603 } else if (get_host(hst, grp, tgrp)) { 1604 syslog(LOG_ERR, 1605 "bad host %s in netgroup %s, skipping", hst, cp); 1606 grp->gr_type = GT_IGNORE; 1607 } 1608 } else if (get_host(cp, grp, tgrp)) { 1609 syslog(LOG_ERR, "bad host %s, skipping", cp); 1610 grp->gr_type = GT_IGNORE; 1611 } 1612 has_host = TRUE; 1613 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1614 endnetgrent(); 1615 *endcp = savedc; 1616 } 1617 cp = endcp; 1618 nextfield(&cp, &endcp); 1619 len = endcp - cp; 1620 } 1621 if (check_options(dirhead)) { 1622 getexp_err(ep, tgrp); 1623 goto nextline; 1624 } 1625 if (!has_host) { 1626 grp->gr_type = GT_DEFAULT; 1627 if (debug) 1628 warnx("adding a default entry"); 1629 1630 /* 1631 * Don't allow a network export coincide with a list of 1632 * host(s) on the same line. 1633 */ 1634 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1635 syslog(LOG_ERR, "network/host conflict"); 1636 getexp_err(ep, tgrp); 1637 goto nextline; 1638 1639 /* 1640 * If an export list was specified on this line, make sure 1641 * that we have at least one valid entry, otherwise skip it. 1642 */ 1643 } else { 1644 grp = tgrp; 1645 while (grp && grp->gr_type == GT_IGNORE) 1646 grp = grp->gr_next; 1647 if (! grp) { 1648 getexp_err(ep, tgrp); 1649 goto nextline; 1650 } 1651 } 1652 1653 if (v4root_phase == 1) { 1654 syslog(LOG_ERR, "V4:root, no dirp, ignored"); 1655 getexp_err(ep, tgrp); 1656 goto nextline; 1657 } 1658 1659 /* 1660 * Loop through hosts, pushing the exports into the kernel. 1661 * After loop, tgrp points to the start of the list and 1662 * grp points to the last entry in the list. 1663 */ 1664 grp = tgrp; 1665 do { 1666 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen, 1667 &fsb)) { 1668 getexp_err(ep, tgrp); 1669 goto nextline; 1670 } 1671 } while (grp->gr_next && (grp = grp->gr_next)); 1672 1673 /* 1674 * For V4: don't enter in mount lists. 1675 */ 1676 if (v4root_phase > 0 && v4root_phase <= 2) { 1677 /* 1678 * Since these structures aren't used by mountd, 1679 * free them up now. 1680 */ 1681 if (ep != NULL) 1682 free_exp(ep); 1683 while (tgrp != NULL) { 1684 grp = tgrp; 1685 tgrp = tgrp->gr_next; 1686 free_grp(grp); 1687 } 1688 goto nextline; 1689 } 1690 1691 /* 1692 * Success. Update the data structures. 1693 */ 1694 if (has_host) { 1695 hang_dirp(dirhead, tgrp, ep, opt_flags); 1696 grp->gr_next = grphead; 1697 grphead = tgrp; 1698 } else { 1699 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1700 opt_flags); 1701 free_grp(grp); 1702 } 1703 dirhead = (struct dirlist *)NULL; 1704 if ((ep->ex_flag & EX_LINKED) == 0) { 1705 ep2 = exphead; 1706 epp = &exphead; 1707 1708 /* 1709 * Insert in the list in alphabetical order. 1710 */ 1711 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1712 epp = &ep2->ex_next; 1713 ep2 = ep2->ex_next; 1714 } 1715 if (ep2) 1716 ep->ex_next = ep2; 1717 *epp = ep; 1718 ep->ex_flag |= EX_LINKED; 1719 } 1720nextline: 1721 v4root_phase = 0; 1722 if (dirhead) { 1723 free_dir(dirhead); 1724 dirhead = (struct dirlist *)NULL; 1725 } 1726 } 1727} 1728 1729/* 1730 * Get the export list from all specified files 1731 */ 1732void 1733get_exportlist(void) 1734{ 1735 struct exportlist *ep, *ep2; 1736 struct grouplist *grp, *tgrp; 1737 struct export_args export; 1738 struct iovec *iov; 1739 struct statfs *fsp, *mntbufp; 1740 struct xvfsconf vfc; 1741 char errmsg[255]; 1742 int num, i; 1743 int iovlen; 1744 int done; 1745 struct nfsex_args eargs; 1746 1747 if (suspend_nfsd != 0) 1748 (void)nfssvc(NFSSVC_SUSPENDNFSD, NULL); 1749 v4root_dirpath[0] = '\0'; 1750 bzero(&export, sizeof(export)); 1751 export.ex_flags = MNT_DELEXPORT; 1752 iov = NULL; 1753 iovlen = 0; 1754 bzero(errmsg, sizeof(errmsg)); 1755 1756 /* 1757 * First, get rid of the old list 1758 */ 1759 ep = exphead; 1760 while (ep) { 1761 ep2 = ep; 1762 ep = ep->ex_next; 1763 free_exp(ep2); 1764 } 1765 exphead = (struct exportlist *)NULL; 1766 1767 grp = grphead; 1768 while (grp) { 1769 tgrp = grp; 1770 grp = grp->gr_next; 1771 free_grp(tgrp); 1772 } 1773 grphead = (struct grouplist *)NULL; 1774 1775 /* 1776 * and the old V4 root dir. 1777 */ 1778 bzero(&eargs, sizeof (eargs)); 1779 eargs.export.ex_flags = MNT_DELEXPORT; 1780 if (run_v4server > 0 && 1781 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 && 1782 errno != ENOENT) 1783 syslog(LOG_ERR, "Can't delete exports for V4:"); 1784 1785 /* 1786 * and clear flag that notes if a public fh has been exported. 1787 */ 1788 has_publicfh = 0; 1789 1790 /* 1791 * And delete exports that are in the kernel for all local 1792 * filesystems. 1793 * XXX: Should know how to handle all local exportable filesystems. 1794 */ 1795 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1796 1797 if (num > 0) { 1798 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1799 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1800 build_iovec(&iov, &iovlen, "from", NULL, 0); 1801 build_iovec(&iov, &iovlen, "update", NULL, 0); 1802 build_iovec(&iov, &iovlen, "export", &export, sizeof(export)); 1803 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 1804 } 1805 1806 for (i = 0; i < num; i++) { 1807 fsp = &mntbufp[i]; 1808 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 1809 syslog(LOG_ERR, "getvfsbyname() failed for %s", 1810 fsp->f_fstypename); 1811 continue; 1812 } 1813 1814 /* 1815 * We do not need to delete "export" flag from 1816 * filesystems that do not have it set. 1817 */ 1818 if (!(fsp->f_flags & MNT_EXPORTED)) 1819 continue; 1820 /* 1821 * Do not delete export for network filesystem by 1822 * passing "export" arg to nmount(). 1823 * It only makes sense to do this for local filesystems. 1824 */ 1825 if (vfc.vfc_flags & VFCF_NETWORK) 1826 continue; 1827 1828 iov[1].iov_base = fsp->f_fstypename; 1829 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 1830 iov[3].iov_base = fsp->f_mntonname; 1831 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 1832 iov[5].iov_base = fsp->f_mntfromname; 1833 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 1834 errmsg[0] = '\0'; 1835 1836 /* 1837 * EXDEV is returned when path exists but is not a 1838 * mount point. May happens if raced with unmount. 1839 */ 1840 if (nmount(iov, iovlen, fsp->f_flags) < 0 && 1841 errno != ENOENT && errno != ENOTSUP && errno != EXDEV) { 1842 syslog(LOG_ERR, 1843 "can't delete exports for %s: %m %s", 1844 fsp->f_mntonname, errmsg); 1845 } 1846 } 1847 1848 if (iov != NULL) { 1849 /* Free strings allocated by strdup() in getmntopts.c */ 1850 free(iov[0].iov_base); /* fstype */ 1851 free(iov[2].iov_base); /* fspath */ 1852 free(iov[4].iov_base); /* from */ 1853 free(iov[6].iov_base); /* update */ 1854 free(iov[8].iov_base); /* export */ 1855 free(iov[10].iov_base); /* errmsg */ 1856 1857 /* free iov, allocated by realloc() */ 1858 free(iov); 1859 iovlen = 0; 1860 } 1861 1862 /* 1863 * Read in the exports file and build the list, calling 1864 * nmount() as we go along to push the export rules into the kernel. 1865 */ 1866 done = 0; 1867 for (i = 0; exnames[i] != NULL; i++) { 1868 if (debug) 1869 warnx("reading exports from %s", exnames[i]); 1870 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1871 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1872 continue; 1873 } 1874 get_exportlist_one(); 1875 fclose(exp_file); 1876 done++; 1877 } 1878 if (done == 0) { 1879 syslog(LOG_ERR, "can't open any exports file"); 1880 exit(2); 1881 } 1882 1883 /* 1884 * If there was no public fh, clear any previous one set. 1885 */ 1886 if (run_v4server > 0 && has_publicfh == 0) 1887 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1888 1889 /* Resume the nfsd. If they weren't suspended, this is harmless. */ 1890 (void)nfssvc(NFSSVC_RESUMENFSD, NULL); 1891} 1892 1893/* 1894 * Allocate an export list element 1895 */ 1896struct exportlist * 1897get_exp(void) 1898{ 1899 struct exportlist *ep; 1900 1901 ep = (struct exportlist *)calloc(1, sizeof (struct exportlist)); 1902 if (ep == (struct exportlist *)NULL) 1903 out_of_mem(); 1904 return (ep); 1905} 1906 1907/* 1908 * Allocate a group list element 1909 */ 1910struct grouplist * 1911get_grp(void) 1912{ 1913 struct grouplist *gp; 1914 1915 gp = (struct grouplist *)calloc(1, sizeof (struct grouplist)); 1916 if (gp == (struct grouplist *)NULL) 1917 out_of_mem(); 1918 return (gp); 1919} 1920 1921/* 1922 * Clean up upon an error in get_exportlist(). 1923 */ 1924void 1925getexp_err(struct exportlist *ep, struct grouplist *grp) 1926{ 1927 struct grouplist *tgrp; 1928 1929 if (!(opt_flags & OP_QUIET)) 1930 syslog(LOG_ERR, "bad exports list line %s", line); 1931 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1932 free_exp(ep); 1933 while (grp) { 1934 tgrp = grp; 1935 grp = grp->gr_next; 1936 free_grp(tgrp); 1937 } 1938} 1939 1940/* 1941 * Search the export list for a matching fs. 1942 */ 1943struct exportlist * 1944ex_search(fsid_t *fsid) 1945{ 1946 struct exportlist *ep; 1947 1948 ep = exphead; 1949 while (ep) { 1950 if (ep->ex_fs.val[0] == fsid->val[0] && 1951 ep->ex_fs.val[1] == fsid->val[1]) 1952 return (ep); 1953 ep = ep->ex_next; 1954 } 1955 return (ep); 1956} 1957 1958/* 1959 * Add a directory path to the list. 1960 */ 1961char * 1962add_expdir(struct dirlist **dpp, char *cp, int len) 1963{ 1964 struct dirlist *dp; 1965 1966 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1967 if (dp == (struct dirlist *)NULL) 1968 out_of_mem(); 1969 dp->dp_left = *dpp; 1970 dp->dp_right = (struct dirlist *)NULL; 1971 dp->dp_flag = 0; 1972 dp->dp_hosts = (struct hostlist *)NULL; 1973 strcpy(dp->dp_dirp, cp); 1974 *dpp = dp; 1975 return (dp->dp_dirp); 1976} 1977 1978/* 1979 * Hang the dir list element off the dirpath binary tree as required 1980 * and update the entry for host. 1981 */ 1982void 1983hang_dirp(struct dirlist *dp, struct grouplist *grp, struct exportlist *ep, 1984 int flags) 1985{ 1986 struct hostlist *hp; 1987 struct dirlist *dp2; 1988 1989 if (flags & OP_ALLDIRS) { 1990 if (ep->ex_defdir) 1991 free((caddr_t)dp); 1992 else 1993 ep->ex_defdir = dp; 1994 if (grp == (struct grouplist *)NULL) { 1995 ep->ex_defdir->dp_flag |= DP_DEFSET; 1996 /* Save the default security flavors list. */ 1997 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 1998 if (ep->ex_numsecflavors > 0) 1999 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2000 sizeof(ep->ex_secflavors)); 2001 } else while (grp) { 2002 hp = get_ht(); 2003 hp->ht_grp = grp; 2004 hp->ht_next = ep->ex_defdir->dp_hosts; 2005 ep->ex_defdir->dp_hosts = hp; 2006 /* Save the security flavors list for this host set. */ 2007 grp->gr_numsecflavors = ep->ex_numsecflavors; 2008 if (ep->ex_numsecflavors > 0) 2009 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2010 sizeof(ep->ex_secflavors)); 2011 grp = grp->gr_next; 2012 } 2013 } else { 2014 2015 /* 2016 * Loop through the directories adding them to the tree. 2017 */ 2018 while (dp) { 2019 dp2 = dp->dp_left; 2020 add_dlist(&ep->ex_dirl, dp, grp, flags, ep); 2021 dp = dp2; 2022 } 2023 } 2024} 2025 2026/* 2027 * Traverse the binary tree either updating a node that is already there 2028 * for the new directory or adding the new node. 2029 */ 2030void 2031add_dlist(struct dirlist **dpp, struct dirlist *newdp, struct grouplist *grp, 2032 int flags, struct exportlist *ep) 2033{ 2034 struct dirlist *dp; 2035 struct hostlist *hp; 2036 int cmp; 2037 2038 dp = *dpp; 2039 if (dp) { 2040 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 2041 if (cmp > 0) { 2042 add_dlist(&dp->dp_left, newdp, grp, flags, ep); 2043 return; 2044 } else if (cmp < 0) { 2045 add_dlist(&dp->dp_right, newdp, grp, flags, ep); 2046 return; 2047 } else 2048 free((caddr_t)newdp); 2049 } else { 2050 dp = newdp; 2051 dp->dp_left = (struct dirlist *)NULL; 2052 *dpp = dp; 2053 } 2054 if (grp) { 2055 2056 /* 2057 * Hang all of the host(s) off of the directory point. 2058 */ 2059 do { 2060 hp = get_ht(); 2061 hp->ht_grp = grp; 2062 hp->ht_next = dp->dp_hosts; 2063 dp->dp_hosts = hp; 2064 /* Save the security flavors list for this host set. */ 2065 grp->gr_numsecflavors = ep->ex_numsecflavors; 2066 if (ep->ex_numsecflavors > 0) 2067 memcpy(grp->gr_secflavors, ep->ex_secflavors, 2068 sizeof(ep->ex_secflavors)); 2069 grp = grp->gr_next; 2070 } while (grp); 2071 } else { 2072 dp->dp_flag |= DP_DEFSET; 2073 /* Save the default security flavors list. */ 2074 ep->ex_defnumsecflavors = ep->ex_numsecflavors; 2075 if (ep->ex_numsecflavors > 0) 2076 memcpy(ep->ex_defsecflavors, ep->ex_secflavors, 2077 sizeof(ep->ex_secflavors)); 2078 } 2079} 2080 2081/* 2082 * Search for a dirpath on the export point. 2083 */ 2084struct dirlist * 2085dirp_search(struct dirlist *dp, char *dirp) 2086{ 2087 int cmp; 2088 2089 if (dp) { 2090 cmp = strcmp(dp->dp_dirp, dirp); 2091 if (cmp > 0) 2092 return (dirp_search(dp->dp_left, dirp)); 2093 else if (cmp < 0) 2094 return (dirp_search(dp->dp_right, dirp)); 2095 else 2096 return (dp); 2097 } 2098 return (dp); 2099} 2100 2101/* 2102 * Scan for a host match in a directory tree. 2103 */ 2104int 2105chk_host(struct dirlist *dp, struct sockaddr *saddr, int *defsetp, 2106 int *hostsetp, int *numsecflavors, int **secflavorsp) 2107{ 2108 struct hostlist *hp; 2109 struct grouplist *grp; 2110 struct addrinfo *ai; 2111 2112 if (dp) { 2113 if (dp->dp_flag & DP_DEFSET) 2114 *defsetp = dp->dp_flag; 2115 hp = dp->dp_hosts; 2116 while (hp) { 2117 grp = hp->ht_grp; 2118 switch (grp->gr_type) { 2119 case GT_HOST: 2120 ai = grp->gr_ptr.gt_addrinfo; 2121 for (; ai; ai = ai->ai_next) { 2122 if (!sacmp(ai->ai_addr, saddr, NULL)) { 2123 *hostsetp = 2124 (hp->ht_flag | DP_HOSTSET); 2125 if (numsecflavors != NULL) { 2126 *numsecflavors = 2127 grp->gr_numsecflavors; 2128 *secflavorsp = 2129 grp->gr_secflavors; 2130 } 2131 return (1); 2132 } 2133 } 2134 break; 2135 case GT_NET: 2136 if (!sacmp(saddr, (struct sockaddr *) 2137 &grp->gr_ptr.gt_net.nt_net, 2138 (struct sockaddr *) 2139 &grp->gr_ptr.gt_net.nt_mask)) { 2140 *hostsetp = (hp->ht_flag | DP_HOSTSET); 2141 if (numsecflavors != NULL) { 2142 *numsecflavors = 2143 grp->gr_numsecflavors; 2144 *secflavorsp = 2145 grp->gr_secflavors; 2146 } 2147 return (1); 2148 } 2149 break; 2150 } 2151 hp = hp->ht_next; 2152 } 2153 } 2154 return (0); 2155} 2156 2157/* 2158 * Scan tree for a host that matches the address. 2159 */ 2160int 2161scan_tree(struct dirlist *dp, struct sockaddr *saddr) 2162{ 2163 int defset, hostset; 2164 2165 if (dp) { 2166 if (scan_tree(dp->dp_left, saddr)) 2167 return (1); 2168 if (chk_host(dp, saddr, &defset, &hostset, NULL, NULL)) 2169 return (1); 2170 if (scan_tree(dp->dp_right, saddr)) 2171 return (1); 2172 } 2173 return (0); 2174} 2175 2176/* 2177 * Traverse the dirlist tree and free it up. 2178 */ 2179void 2180free_dir(struct dirlist *dp) 2181{ 2182 2183 if (dp) { 2184 free_dir(dp->dp_left); 2185 free_dir(dp->dp_right); 2186 free_host(dp->dp_hosts); 2187 free((caddr_t)dp); 2188 } 2189} 2190 2191/* 2192 * Parse a colon separated list of security flavors 2193 */ 2194int 2195parsesec(char *seclist, struct exportlist *ep) 2196{ 2197 char *cp, savedc; 2198 int flavor; 2199 2200 ep->ex_numsecflavors = 0; 2201 for (;;) { 2202 cp = strchr(seclist, ':'); 2203 if (cp) { 2204 savedc = *cp; 2205 *cp = '\0'; 2206 } 2207 2208 if (!strcmp(seclist, "sys")) 2209 flavor = AUTH_SYS; 2210 else if (!strcmp(seclist, "krb5")) 2211 flavor = RPCSEC_GSS_KRB5; 2212 else if (!strcmp(seclist, "krb5i")) 2213 flavor = RPCSEC_GSS_KRB5I; 2214 else if (!strcmp(seclist, "krb5p")) 2215 flavor = RPCSEC_GSS_KRB5P; 2216 else { 2217 if (cp) 2218 *cp = savedc; 2219 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 2220 return (1); 2221 } 2222 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 2223 if (cp) 2224 *cp = savedc; 2225 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 2226 return (1); 2227 } 2228 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 2229 ep->ex_numsecflavors++; 2230 if (cp) { 2231 *cp = savedc; 2232 seclist = cp + 1; 2233 } else { 2234 break; 2235 } 2236 } 2237 return (0); 2238} 2239 2240/* 2241 * Parse the option string and update fields. 2242 * Option arguments may either be -<option>=<value> or 2243 * -<option> <value> 2244 */ 2245int 2246do_opt(char **cpp, char **endcpp, struct exportlist *ep, struct grouplist *grp, 2247 int *has_hostp, int *exflagsp, struct xucred *cr) 2248{ 2249 char *cpoptarg, *cpoptend; 2250 char *cp, *endcp, *cpopt, savedc, savedc2; 2251 int allflag, usedarg; 2252 2253 savedc2 = '\0'; 2254 cpopt = *cpp; 2255 cpopt++; 2256 cp = *endcpp; 2257 savedc = *cp; 2258 *cp = '\0'; 2259 while (cpopt && *cpopt) { 2260 allflag = 1; 2261 usedarg = -2; 2262 if ((cpoptend = strchr(cpopt, ','))) { 2263 *cpoptend++ = '\0'; 2264 if ((cpoptarg = strchr(cpopt, '='))) 2265 *cpoptarg++ = '\0'; 2266 } else { 2267 if ((cpoptarg = strchr(cpopt, '='))) 2268 *cpoptarg++ = '\0'; 2269 else { 2270 *cp = savedc; 2271 nextfield(&cp, &endcp); 2272 **endcpp = '\0'; 2273 if (endcp > cp && *cp != '-') { 2274 cpoptarg = cp; 2275 savedc2 = *endcp; 2276 *endcp = '\0'; 2277 usedarg = 0; 2278 } 2279 } 2280 } 2281 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2282 *exflagsp |= MNT_EXRDONLY; 2283 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2284 !(allflag = strcmp(cpopt, "mapall")) || 2285 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2286 usedarg++; 2287 parsecred(cpoptarg, cr); 2288 if (allflag == 0) { 2289 *exflagsp |= MNT_EXPORTANON; 2290 opt_flags |= OP_MAPALL; 2291 } else 2292 opt_flags |= OP_MAPROOT; 2293 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2294 !strcmp(cpopt, "m"))) { 2295 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2296 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2297 return (1); 2298 } 2299 usedarg++; 2300 opt_flags |= OP_MASK; 2301 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2302 !strcmp(cpopt, "n"))) { 2303 if (strchr(cpoptarg, '/') != NULL) { 2304 if (debug) 2305 fprintf(stderr, "setting OP_MASKLEN\n"); 2306 opt_flags |= OP_MASKLEN; 2307 } 2308 if (grp->gr_type != GT_NULL) { 2309 syslog(LOG_ERR, "network/host conflict"); 2310 return (1); 2311 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2312 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2313 return (1); 2314 } 2315 grp->gr_type = GT_NET; 2316 *has_hostp = 1; 2317 usedarg++; 2318 opt_flags |= OP_NET; 2319 } else if (!strcmp(cpopt, "alldirs")) { 2320 opt_flags |= OP_ALLDIRS; 2321 } else if (!strcmp(cpopt, "public")) { 2322 *exflagsp |= MNT_EXPUBLIC; 2323 } else if (!strcmp(cpopt, "webnfs")) { 2324 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2325 opt_flags |= OP_MAPALL; 2326 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2327 ep->ex_indexfile = strdup(cpoptarg); 2328 } else if (!strcmp(cpopt, "quiet")) { 2329 opt_flags |= OP_QUIET; 2330 } else if (cpoptarg && !strcmp(cpopt, "sec")) { 2331 if (parsesec(cpoptarg, ep)) 2332 return (1); 2333 opt_flags |= OP_SEC; 2334 usedarg++; 2335 } else { 2336 syslog(LOG_ERR, "bad opt %s", cpopt); 2337 return (1); 2338 } 2339 if (usedarg >= 0) { 2340 *endcp = savedc2; 2341 **endcpp = savedc; 2342 if (usedarg > 0) { 2343 *cpp = cp; 2344 *endcpp = endcp; 2345 } 2346 return (0); 2347 } 2348 cpopt = cpoptend; 2349 } 2350 **endcpp = savedc; 2351 return (0); 2352} 2353 2354/* 2355 * Translate a character string to the corresponding list of network 2356 * addresses for a hostname. 2357 */ 2358int 2359get_host(char *cp, struct grouplist *grp, struct grouplist *tgrp) 2360{ 2361 struct grouplist *checkgrp; 2362 struct addrinfo *ai, *tai, hints; 2363 int ecode; 2364 char host[NI_MAXHOST]; 2365 2366 if (grp->gr_type != GT_NULL) { 2367 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2368 return (1); 2369 } 2370 memset(&hints, 0, sizeof hints); 2371 hints.ai_flags = AI_CANONNAME; 2372 hints.ai_protocol = IPPROTO_UDP; 2373 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2374 if (ecode != 0) { 2375 syslog(LOG_ERR,"can't get address info for host %s", cp); 2376 return 1; 2377 } 2378 grp->gr_ptr.gt_addrinfo = ai; 2379 while (ai != NULL) { 2380 if (ai->ai_canonname == NULL) { 2381 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2382 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2383 strlcpy(host, "?", sizeof(host)); 2384 ai->ai_canonname = strdup(host); 2385 ai->ai_flags |= AI_CANONNAME; 2386 } 2387 if (debug) 2388 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2389 /* 2390 * Sanity check: make sure we don't already have an entry 2391 * for this host in the grouplist. 2392 */ 2393 for (checkgrp = tgrp; checkgrp != NULL; 2394 checkgrp = checkgrp->gr_next) { 2395 if (checkgrp->gr_type != GT_HOST) 2396 continue; 2397 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2398 tai = tai->ai_next) { 2399 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2400 continue; 2401 if (debug) 2402 fprintf(stderr, 2403 "ignoring duplicate host %s\n", 2404 ai->ai_canonname); 2405 grp->gr_type = GT_IGNORE; 2406 return (0); 2407 } 2408 } 2409 ai = ai->ai_next; 2410 } 2411 grp->gr_type = GT_HOST; 2412 return (0); 2413} 2414 2415/* 2416 * Free up an exports list component 2417 */ 2418void 2419free_exp(struct exportlist *ep) 2420{ 2421 2422 if (ep->ex_defdir) { 2423 free_host(ep->ex_defdir->dp_hosts); 2424 free((caddr_t)ep->ex_defdir); 2425 } 2426 if (ep->ex_fsdir) 2427 free(ep->ex_fsdir); 2428 if (ep->ex_indexfile) 2429 free(ep->ex_indexfile); 2430 free_dir(ep->ex_dirl); 2431 free((caddr_t)ep); 2432} 2433 2434/* 2435 * Free hosts. 2436 */ 2437void 2438free_host(struct hostlist *hp) 2439{ 2440 struct hostlist *hp2; 2441 2442 while (hp) { 2443 hp2 = hp; 2444 hp = hp->ht_next; 2445 free((caddr_t)hp2); 2446 } 2447} 2448 2449struct hostlist * 2450get_ht(void) 2451{ 2452 struct hostlist *hp; 2453 2454 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2455 if (hp == (struct hostlist *)NULL) 2456 out_of_mem(); 2457 hp->ht_next = (struct hostlist *)NULL; 2458 hp->ht_flag = 0; 2459 return (hp); 2460} 2461 2462/* 2463 * Out of memory, fatal 2464 */ 2465void 2466out_of_mem(void) 2467{ 2468 2469 syslog(LOG_ERR, "out of memory"); 2470 exit(2); 2471} 2472 2473/* 2474 * Do the nmount() syscall with the update flag to push the export info into 2475 * the kernel. 2476 */ 2477int 2478do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2479 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 2480{ 2481 struct statfs fsb1; 2482 struct addrinfo *ai; 2483 struct export_args ea, *eap; 2484 char errmsg[255]; 2485 char *cp; 2486 int done; 2487 char savedc; 2488 struct iovec *iov; 2489 int i, iovlen; 2490 int ret; 2491 struct nfsex_args nfsea; 2492 2493 if (run_v4server > 0) 2494 eap = &nfsea.export; 2495 else 2496 eap = &ea; 2497 2498 cp = NULL; 2499 savedc = '\0'; 2500 iov = NULL; 2501 iovlen = 0; 2502 ret = 0; 2503 2504 bzero(eap, sizeof (struct export_args)); 2505 bzero(errmsg, sizeof(errmsg)); 2506 eap->ex_flags = exflags; 2507 eap->ex_anon = *anoncrp; 2508 eap->ex_indexfile = ep->ex_indexfile; 2509 if (grp->gr_type == GT_HOST) 2510 ai = grp->gr_ptr.gt_addrinfo; 2511 else 2512 ai = NULL; 2513 eap->ex_numsecflavors = ep->ex_numsecflavors; 2514 for (i = 0; i < eap->ex_numsecflavors; i++) 2515 eap->ex_secflavors[i] = ep->ex_secflavors[i]; 2516 if (eap->ex_numsecflavors == 0) { 2517 eap->ex_numsecflavors = 1; 2518 eap->ex_secflavors[0] = AUTH_SYS; 2519 } 2520 done = FALSE; 2521 2522 if (v4root_phase == 0) { 2523 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2524 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2525 build_iovec(&iov, &iovlen, "from", NULL, 0); 2526 build_iovec(&iov, &iovlen, "update", NULL, 0); 2527 build_iovec(&iov, &iovlen, "export", eap, 2528 sizeof (struct export_args)); 2529 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 2530 } 2531 2532 while (!done) { 2533 switch (grp->gr_type) { 2534 case GT_HOST: 2535 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 2536 goto skip; 2537 eap->ex_addr = ai->ai_addr; 2538 eap->ex_addrlen = ai->ai_addrlen; 2539 eap->ex_masklen = 0; 2540 break; 2541 case GT_NET: 2542 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 2543 have_v6 == 0) 2544 goto skip; 2545 eap->ex_addr = 2546 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 2547 eap->ex_addrlen = 2548 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 2549 eap->ex_mask = 2550 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 2551 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 2552 break; 2553 case GT_DEFAULT: 2554 eap->ex_addr = NULL; 2555 eap->ex_addrlen = 0; 2556 eap->ex_mask = NULL; 2557 eap->ex_masklen = 0; 2558 break; 2559 case GT_IGNORE: 2560 ret = 0; 2561 goto error_exit; 2562 break; 2563 default: 2564 syslog(LOG_ERR, "bad grouptype"); 2565 if (cp) 2566 *cp = savedc; 2567 ret = 1; 2568 goto error_exit; 2569 }; 2570 2571 /* 2572 * For V4:, use the nfssvc() syscall, instead of mount(). 2573 */ 2574 if (v4root_phase == 2) { 2575 nfsea.fspec = v4root_dirpath; 2576 if (run_v4server > 0 && 2577 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 2578 syslog(LOG_ERR, "Exporting V4: failed"); 2579 return (2); 2580 } 2581 } else { 2582 /* 2583 * XXX: 2584 * Maybe I should just use the fsb->f_mntonname path 2585 * instead of looping back up the dirp to the mount 2586 * point?? 2587 * Also, needs to know how to export all types of local 2588 * exportable filesystems and not just "ufs". 2589 */ 2590 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 2591 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 2592 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 2593 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 2594 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 2595 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 2596 errmsg[0] = '\0'; 2597 2598 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 2599 if (cp) 2600 *cp-- = savedc; 2601 else 2602 cp = dirp + dirplen - 1; 2603 if (opt_flags & OP_QUIET) { 2604 ret = 1; 2605 goto error_exit; 2606 } 2607 if (errno == EPERM) { 2608 if (debug) 2609 warnx("can't change attributes for %s: %s", 2610 dirp, errmsg); 2611 syslog(LOG_ERR, 2612 "can't change attributes for %s: %s", 2613 dirp, errmsg); 2614 ret = 1; 2615 goto error_exit; 2616 } 2617 if (opt_flags & OP_ALLDIRS) { 2618 if (errno == EINVAL) 2619 syslog(LOG_ERR, 2620 "-alldirs requested but %s is not a filesystem mountpoint", 2621 dirp); 2622 else 2623 syslog(LOG_ERR, 2624 "could not remount %s: %m", 2625 dirp); 2626 ret = 1; 2627 goto error_exit; 2628 } 2629 /* back up over the last component */ 2630 while (*cp == '/' && cp > dirp) 2631 cp--; 2632 while (*(cp - 1) != '/' && cp > dirp) 2633 cp--; 2634 if (cp == dirp) { 2635 if (debug) 2636 warnx("mnt unsucc"); 2637 syslog(LOG_ERR, "can't export %s %s", 2638 dirp, errmsg); 2639 ret = 1; 2640 goto error_exit; 2641 } 2642 savedc = *cp; 2643 *cp = '\0'; 2644 /* 2645 * Check that we're still on the same 2646 * filesystem. 2647 */ 2648 if (statfs(dirp, &fsb1) != 0 || 2649 bcmp(&fsb1.f_fsid, &fsb->f_fsid, 2650 sizeof (fsb1.f_fsid)) != 0) { 2651 *cp = savedc; 2652 syslog(LOG_ERR, 2653 "can't export %s %s", dirp, 2654 errmsg); 2655 ret = 1; 2656 goto error_exit; 2657 } 2658 } 2659 } 2660 2661 /* 2662 * For the experimental server: 2663 * If this is the public directory, get the file handle 2664 * and load it into the kernel via the nfssvc() syscall. 2665 */ 2666 if (run_v4server > 0 && (exflags & MNT_EXPUBLIC) != 0) { 2667 fhandle_t fh; 2668 char *public_name; 2669 2670 if (eap->ex_indexfile != NULL) 2671 public_name = eap->ex_indexfile; 2672 else 2673 public_name = dirp; 2674 if (getfh(public_name, &fh) < 0) 2675 syslog(LOG_ERR, 2676 "Can't get public fh for %s", public_name); 2677 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 2678 syslog(LOG_ERR, 2679 "Can't set public fh for %s", public_name); 2680 else 2681 has_publicfh = 1; 2682 } 2683skip: 2684 if (ai != NULL) 2685 ai = ai->ai_next; 2686 if (ai == NULL) 2687 done = TRUE; 2688 } 2689 if (cp) 2690 *cp = savedc; 2691error_exit: 2692 /* free strings allocated by strdup() in getmntopts.c */ 2693 if (iov != NULL) { 2694 free(iov[0].iov_base); /* fstype */ 2695 free(iov[2].iov_base); /* fspath */ 2696 free(iov[4].iov_base); /* from */ 2697 free(iov[6].iov_base); /* update */ 2698 free(iov[8].iov_base); /* export */ 2699 free(iov[10].iov_base); /* errmsg */ 2700 2701 /* free iov, allocated by realloc() */ 2702 free(iov); 2703 } 2704 return (ret); 2705} 2706 2707/* 2708 * Translate a net address. 2709 * 2710 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2711 */ 2712int 2713get_net(char *cp, struct netmsk *net, int maskflg) 2714{ 2715 struct netent *np = NULL; 2716 char *name, *p, *prefp; 2717 struct sockaddr_in sin; 2718 struct sockaddr *sa = NULL; 2719 struct addrinfo hints, *ai = NULL; 2720 char netname[NI_MAXHOST]; 2721 long preflen; 2722 2723 p = prefp = NULL; 2724 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2725 p = strchr(cp, '/'); 2726 *p = '\0'; 2727 prefp = p + 1; 2728 } 2729 2730 /* 2731 * Check for a numeric address first. We wish to avoid 2732 * possible DNS lookups in getnetbyname(). 2733 */ 2734 if (isxdigit(*cp) || *cp == ':') { 2735 memset(&hints, 0, sizeof hints); 2736 /* Ensure the mask and the network have the same family. */ 2737 if (maskflg && (opt_flags & OP_NET)) 2738 hints.ai_family = net->nt_net.ss_family; 2739 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2740 hints.ai_family = net->nt_mask.ss_family; 2741 else 2742 hints.ai_family = AF_UNSPEC; 2743 hints.ai_flags = AI_NUMERICHOST; 2744 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2745 sa = ai->ai_addr; 2746 if (sa != NULL && ai->ai_family == AF_INET) { 2747 /* 2748 * The address in `cp' is really a network address, so 2749 * use inet_network() to re-interpret this correctly. 2750 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2751 */ 2752 bzero(&sin, sizeof sin); 2753 sin.sin_family = AF_INET; 2754 sin.sin_len = sizeof sin; 2755 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2756 if (debug) 2757 fprintf(stderr, "get_net: v4 addr %s\n", 2758 inet_ntoa(sin.sin_addr)); 2759 sa = (struct sockaddr *)&sin; 2760 } 2761 } 2762 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2763 bzero(&sin, sizeof sin); 2764 sin.sin_family = AF_INET; 2765 sin.sin_len = sizeof sin; 2766 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2767 sa = (struct sockaddr *)&sin; 2768 } 2769 if (sa == NULL) 2770 goto fail; 2771 2772 if (maskflg) { 2773 /* The specified sockaddr is a mask. */ 2774 if (checkmask(sa) != 0) 2775 goto fail; 2776 bcopy(sa, &net->nt_mask, sa->sa_len); 2777 opt_flags |= OP_HAVEMASK; 2778 } else { 2779 /* The specified sockaddr is a network address. */ 2780 bcopy(sa, &net->nt_net, sa->sa_len); 2781 2782 /* Get a network name for the export list. */ 2783 if (np) { 2784 name = np->n_name; 2785 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2786 NULL, 0, NI_NUMERICHOST) == 0) { 2787 name = netname; 2788 } else { 2789 goto fail; 2790 } 2791 if ((net->nt_name = strdup(name)) == NULL) 2792 out_of_mem(); 2793 2794 /* 2795 * Extract a mask from either a "/<masklen>" suffix, or 2796 * from the class of an IPv4 address. 2797 */ 2798 if (opt_flags & OP_MASKLEN) { 2799 preflen = strtol(prefp, NULL, 10); 2800 if (preflen < 0L || preflen == LONG_MAX) 2801 goto fail; 2802 bcopy(sa, &net->nt_mask, sa->sa_len); 2803 if (makemask(&net->nt_mask, (int)preflen) != 0) 2804 goto fail; 2805 opt_flags |= OP_HAVEMASK; 2806 *p = '/'; 2807 } else if (sa->sa_family == AF_INET && 2808 (opt_flags & OP_MASK) == 0) { 2809 in_addr_t addr; 2810 2811 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2812 if (IN_CLASSA(addr)) 2813 preflen = 8; 2814 else if (IN_CLASSB(addr)) 2815 preflen = 16; 2816 else if (IN_CLASSC(addr)) 2817 preflen = 24; 2818 else if (IN_CLASSD(addr)) 2819 preflen = 28; 2820 else 2821 preflen = 32; /* XXX */ 2822 2823 bcopy(sa, &net->nt_mask, sa->sa_len); 2824 makemask(&net->nt_mask, (int)preflen); 2825 opt_flags |= OP_HAVEMASK; 2826 } 2827 } 2828 2829 if (ai) 2830 freeaddrinfo(ai); 2831 return 0; 2832 2833fail: 2834 if (ai) 2835 freeaddrinfo(ai); 2836 return 1; 2837} 2838 2839/* 2840 * Parse out the next white space separated field 2841 */ 2842void 2843nextfield(char **cp, char **endcp) 2844{ 2845 char *p; 2846 2847 p = *cp; 2848 while (*p == ' ' || *p == '\t') 2849 p++; 2850 if (*p == '\n' || *p == '\0') 2851 *cp = *endcp = p; 2852 else { 2853 *cp = p++; 2854 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2855 p++; 2856 *endcp = p; 2857 } 2858} 2859 2860/* 2861 * Get an exports file line. Skip over blank lines and handle line 2862 * continuations. 2863 */ 2864int 2865get_line(void) 2866{ 2867 char *p, *cp; 2868 size_t len; 2869 int totlen, cont_line; 2870 2871 /* 2872 * Loop around ignoring blank lines and getting all continuation lines. 2873 */ 2874 p = line; 2875 totlen = 0; 2876 do { 2877 if ((p = fgetln(exp_file, &len)) == NULL) 2878 return (0); 2879 cp = p + len - 1; 2880 cont_line = 0; 2881 while (cp >= p && 2882 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2883 if (*cp == '\\') 2884 cont_line = 1; 2885 cp--; 2886 len--; 2887 } 2888 if (cont_line) { 2889 *++cp = ' '; 2890 len++; 2891 } 2892 if (linesize < len + totlen + 1) { 2893 linesize = len + totlen + 1; 2894 line = realloc(line, linesize); 2895 if (line == NULL) 2896 out_of_mem(); 2897 } 2898 memcpy(line + totlen, p, len); 2899 totlen += len; 2900 line[totlen] = '\0'; 2901 } while (totlen == 0 || cont_line); 2902 return (1); 2903} 2904 2905/* 2906 * Parse a description of a credential. 2907 */ 2908void 2909parsecred(char *namelist, struct xucred *cr) 2910{ 2911 char *name; 2912 int cnt; 2913 char *names; 2914 struct passwd *pw; 2915 struct group *gr; 2916 gid_t groups[XU_NGROUPS + 1]; 2917 int ngroups; 2918 2919 cr->cr_version = XUCRED_VERSION; 2920 /* 2921 * Set up the unprivileged user. 2922 */ 2923 cr->cr_uid = -2; 2924 cr->cr_groups[0] = -2; 2925 cr->cr_ngroups = 1; 2926 /* 2927 * Get the user's password table entry. 2928 */ 2929 names = strsep_quote(&namelist, " \t\n"); 2930 name = strsep(&names, ":"); 2931 /* Bug? name could be NULL here */ 2932 if (isdigit(*name) || *name == '-') 2933 pw = getpwuid(atoi(name)); 2934 else 2935 pw = getpwnam(name); 2936 /* 2937 * Credentials specified as those of a user. 2938 */ 2939 if (names == NULL) { 2940 if (pw == NULL) { 2941 syslog(LOG_ERR, "unknown user: %s", name); 2942 return; 2943 } 2944 cr->cr_uid = pw->pw_uid; 2945 ngroups = XU_NGROUPS + 1; 2946 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2947 syslog(LOG_ERR, "too many groups"); 2948 /* 2949 * Compress out duplicate. 2950 */ 2951 cr->cr_ngroups = ngroups - 1; 2952 cr->cr_groups[0] = groups[0]; 2953 for (cnt = 2; cnt < ngroups; cnt++) 2954 cr->cr_groups[cnt - 1] = groups[cnt]; 2955 return; 2956 } 2957 /* 2958 * Explicit credential specified as a colon separated list: 2959 * uid:gid:gid:... 2960 */ 2961 if (pw != NULL) 2962 cr->cr_uid = pw->pw_uid; 2963 else if (isdigit(*name) || *name == '-') 2964 cr->cr_uid = atoi(name); 2965 else { 2966 syslog(LOG_ERR, "unknown user: %s", name); 2967 return; 2968 } 2969 cr->cr_ngroups = 0; 2970 while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) { 2971 name = strsep(&names, ":"); 2972 if (isdigit(*name) || *name == '-') { 2973 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2974 } else { 2975 if ((gr = getgrnam(name)) == NULL) { 2976 syslog(LOG_ERR, "unknown group: %s", name); 2977 continue; 2978 } 2979 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2980 } 2981 } 2982 if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS) 2983 syslog(LOG_ERR, "too many groups"); 2984} 2985 2986#define STRSIZ (MNTNAMLEN+MNTPATHLEN+50) 2987/* 2988 * Routines that maintain the remote mounttab 2989 */ 2990void 2991get_mountlist(void) 2992{ 2993 struct mountlist *mlp, **mlpp; 2994 char *host, *dirp, *cp; 2995 char str[STRSIZ]; 2996 FILE *mlfile; 2997 2998 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2999 if (errno == ENOENT) 3000 return; 3001 else { 3002 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 3003 return; 3004 } 3005 } 3006 mlpp = &mlhead; 3007 while (fgets(str, STRSIZ, mlfile) != NULL) { 3008 cp = str; 3009 host = strsep(&cp, " \t\n"); 3010 dirp = strsep(&cp, " \t\n"); 3011 if (host == NULL || dirp == NULL) 3012 continue; 3013 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3014 if (mlp == (struct mountlist *)NULL) 3015 out_of_mem(); 3016 strncpy(mlp->ml_host, host, MNTNAMLEN); 3017 mlp->ml_host[MNTNAMLEN] = '\0'; 3018 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3019 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3020 mlp->ml_next = (struct mountlist *)NULL; 3021 *mlpp = mlp; 3022 mlpp = &mlp->ml_next; 3023 } 3024 fclose(mlfile); 3025} 3026 3027void 3028del_mlist(char *hostp, char *dirp) 3029{ 3030 struct mountlist *mlp, **mlpp; 3031 struct mountlist *mlp2; 3032 FILE *mlfile; 3033 int fnd = 0; 3034 3035 mlpp = &mlhead; 3036 mlp = mlhead; 3037 while (mlp) { 3038 if (!strcmp(mlp->ml_host, hostp) && 3039 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 3040 fnd = 1; 3041 mlp2 = mlp; 3042 *mlpp = mlp = mlp->ml_next; 3043 free((caddr_t)mlp2); 3044 } else { 3045 mlpp = &mlp->ml_next; 3046 mlp = mlp->ml_next; 3047 } 3048 } 3049 if (fnd) { 3050 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 3051 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 3052 return; 3053 } 3054 mlp = mlhead; 3055 while (mlp) { 3056 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3057 mlp = mlp->ml_next; 3058 } 3059 fclose(mlfile); 3060 } 3061} 3062 3063void 3064add_mlist(char *hostp, char *dirp) 3065{ 3066 struct mountlist *mlp, **mlpp; 3067 FILE *mlfile; 3068 3069 mlpp = &mlhead; 3070 mlp = mlhead; 3071 while (mlp) { 3072 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 3073 return; 3074 mlpp = &mlp->ml_next; 3075 mlp = mlp->ml_next; 3076 } 3077 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 3078 if (mlp == (struct mountlist *)NULL) 3079 out_of_mem(); 3080 strncpy(mlp->ml_host, hostp, MNTNAMLEN); 3081 mlp->ml_host[MNTNAMLEN] = '\0'; 3082 strncpy(mlp->ml_dirp, dirp, MNTPATHLEN); 3083 mlp->ml_dirp[MNTPATHLEN] = '\0'; 3084 mlp->ml_next = (struct mountlist *)NULL; 3085 *mlpp = mlp; 3086 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 3087 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 3088 return; 3089 } 3090 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 3091 fclose(mlfile); 3092} 3093 3094/* 3095 * Free up a group list. 3096 */ 3097void 3098free_grp(struct grouplist *grp) 3099{ 3100 if (grp->gr_type == GT_HOST) { 3101 if (grp->gr_ptr.gt_addrinfo != NULL) 3102 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 3103 } else if (grp->gr_type == GT_NET) { 3104 if (grp->gr_ptr.gt_net.nt_name) 3105 free(grp->gr_ptr.gt_net.nt_name); 3106 } 3107 free((caddr_t)grp); 3108} 3109 3110#ifdef DEBUG 3111void 3112SYSLOG(int pri, const char *fmt, ...) 3113{ 3114 va_list ap; 3115 3116 va_start(ap, fmt); 3117 vfprintf(stderr, fmt, ap); 3118 va_end(ap); 3119} 3120#endif /* DEBUG */ 3121 3122/* 3123 * Check options for consistency. 3124 */ 3125int 3126check_options(struct dirlist *dp) 3127{ 3128 3129 if (v4root_phase == 0 && dp == NULL) 3130 return (1); 3131 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 3132 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 3133 return (1); 3134 } 3135 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 3136 syslog(LOG_ERR, "-mask requires -network"); 3137 return (1); 3138 } 3139 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 3140 syslog(LOG_ERR, "-network requires mask specification"); 3141 return (1); 3142 } 3143 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 3144 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 3145 return (1); 3146 } 3147 if (v4root_phase > 0 && 3148 (opt_flags & 3149 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 3150 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 3151 return (1); 3152 } 3153 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 3154 syslog(LOG_ERR, "-alldirs has multiple directories"); 3155 return (1); 3156 } 3157 return (0); 3158} 3159 3160/* 3161 * Check an absolute directory path for any symbolic links. Return true 3162 */ 3163int 3164check_dirpath(char *dirp) 3165{ 3166 char *cp; 3167 int ret = 1; 3168 struct stat sb; 3169 3170 cp = dirp + 1; 3171 while (*cp && ret) { 3172 if (*cp == '/') { 3173 *cp = '\0'; 3174 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3175 ret = 0; 3176 *cp = '/'; 3177 } 3178 cp++; 3179 } 3180 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 3181 ret = 0; 3182 return (ret); 3183} 3184 3185/* 3186 * Make a netmask according to the specified prefix length. The ss_family 3187 * and other non-address fields must be initialised before calling this. 3188 */ 3189int 3190makemask(struct sockaddr_storage *ssp, int bitlen) 3191{ 3192 u_char *p; 3193 int bits, i, len; 3194 3195 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 3196 return (-1); 3197 if (bitlen > len * CHAR_BIT) 3198 return (-1); 3199 3200 for (i = 0; i < len; i++) { 3201 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 3202 *p++ = (u_char)~0 << (CHAR_BIT - bits); 3203 bitlen -= bits; 3204 } 3205 return 0; 3206} 3207 3208/* 3209 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 3210 * is acceptable (i.e. of the form 1...10....0). 3211 */ 3212int 3213checkmask(struct sockaddr *sa) 3214{ 3215 u_char *mask; 3216 int i, len; 3217 3218 if ((mask = sa_rawaddr(sa, &len)) == NULL) 3219 return (-1); 3220 3221 for (i = 0; i < len; i++) 3222 if (mask[i] != 0xff) 3223 break; 3224 if (i < len) { 3225 if (~mask[i] & (u_char)(~mask[i] + 1)) 3226 return (-1); 3227 i++; 3228 } 3229 for (; i < len; i++) 3230 if (mask[i] != 0) 3231 return (-1); 3232 return (0); 3233} 3234 3235/* 3236 * Compare two sockaddrs according to a specified mask. Return zero if 3237 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 3238 * If samask is NULL, perform a full comparison. 3239 */ 3240int 3241sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 3242{ 3243 unsigned char *p1, *p2, *mask; 3244 int len, i; 3245 3246 if (sa1->sa_family != sa2->sa_family || 3247 (p1 = sa_rawaddr(sa1, &len)) == NULL || 3248 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 3249 return (1); 3250 3251 switch (sa1->sa_family) { 3252 case AF_INET6: 3253 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 3254 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 3255 return (1); 3256 break; 3257 } 3258 3259 /* Simple binary comparison if no mask specified. */ 3260 if (samask == NULL) 3261 return (memcmp(p1, p2, len)); 3262 3263 /* Set up the mask, and do a mask-based comparison. */ 3264 if (sa1->sa_family != samask->sa_family || 3265 (mask = sa_rawaddr(samask, NULL)) == NULL) 3266 return (1); 3267 3268 for (i = 0; i < len; i++) 3269 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3270 return (1); 3271 return (0); 3272} 3273 3274/* 3275 * Return a pointer to the part of the sockaddr that contains the 3276 * raw address, and set *nbytes to its length in bytes. Returns 3277 * NULL if the address family is unknown. 3278 */ 3279void * 3280sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3281 void *p; 3282 int len; 3283 3284 switch (sa->sa_family) { 3285 case AF_INET: 3286 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3287 p = &((struct sockaddr_in *)sa)->sin_addr; 3288 break; 3289 case AF_INET6: 3290 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3291 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3292 break; 3293 default: 3294 p = NULL; 3295 len = 0; 3296 } 3297 3298 if (nbytes != NULL) 3299 *nbytes = len; 3300 return (p); 3301} 3302 3303void 3304huphandler(int sig __unused) 3305{ 3306 got_sighup = 1; 3307} 3308 3309void terminate(int sig __unused) 3310{ 3311 pidfile_remove(pfh); 3312 rpcb_unset(MOUNTPROG, MOUNTVERS, NULL); 3313 rpcb_unset(MOUNTPROG, MOUNTVERS3, NULL); 3314 exit (0); 3315} 3316 3317