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