mountd.c revision 194773
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: head/usr.sbin/mountd/mountd.c 194773 2009-06-23 21:48:04Z 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/rpcv2.h> 63#include <nfs/nfsproto.h> 64#include <nfs/nfssvc.h> 65#include <nfsserver/nfs.h> 66 67#include <fs/nfs/nfsport.h> 68 69#include <arpa/inet.h> 70 71#include <ctype.h> 72#include <err.h> 73#include <errno.h> 74#include <grp.h> 75#include <libutil.h> 76#include <limits.h> 77#include <netdb.h> 78#include <pwd.h> 79#include <signal.h> 80#include <stdio.h> 81#include <stdlib.h> 82#include <string.h> 83#include <unistd.h> 84#include "pathnames.h" 85#include "mntopts.h" 86 87#ifdef DEBUG 88#include <stdarg.h> 89#endif 90 91/* 92 * Structures for keeping the mount list and export list 93 */ 94struct mountlist { 95 struct mountlist *ml_next; 96 char ml_host[RPCMNT_NAMELEN+1]; 97 char ml_dirp[RPCMNT_PATHLEN+1]; 98}; 99 100struct dirlist { 101 struct dirlist *dp_left; 102 struct dirlist *dp_right; 103 int dp_flag; 104 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 105 char dp_dirp[1]; /* Actually malloc'd to size of dir */ 106}; 107/* dp_flag bits */ 108#define DP_DEFSET 0x1 109#define DP_HOSTSET 0x2 110 111struct exportlist { 112 struct exportlist *ex_next; 113 struct dirlist *ex_dirl; 114 struct dirlist *ex_defdir; 115 int ex_flag; 116 fsid_t ex_fs; 117 char *ex_fsdir; 118 char *ex_indexfile; 119 int ex_numsecflavors; 120 int ex_secflavors[MAXSECFLAVORS]; 121}; 122/* ex_flag bits */ 123#define EX_LINKED 0x1 124 125struct netmsk { 126 struct sockaddr_storage nt_net; 127 struct sockaddr_storage nt_mask; 128 char *nt_name; 129}; 130 131union grouptypes { 132 struct addrinfo *gt_addrinfo; 133 struct netmsk gt_net; 134}; 135 136struct grouplist { 137 int gr_type; 138 union grouptypes gr_ptr; 139 struct grouplist *gr_next; 140}; 141/* Group types */ 142#define GT_NULL 0x0 143#define GT_HOST 0x1 144#define GT_NET 0x2 145#define GT_DEFAULT 0x3 146#define GT_IGNORE 0x5 147 148struct hostlist { 149 int ht_flag; /* Uses DP_xx bits */ 150 struct grouplist *ht_grp; 151 struct hostlist *ht_next; 152}; 153 154struct fhreturn { 155 int fhr_flag; 156 int fhr_vers; 157 nfsfh_t fhr_fh; 158 int fhr_numsecflavors; 159 int *fhr_secflavors; 160}; 161 162/* Global defs */ 163char *add_expdir(struct dirlist **, char *, int); 164void add_dlist(struct dirlist **, struct dirlist *, 165 struct grouplist *, int); 166void add_mlist(char *, char *); 167int check_dirpath(char *); 168int check_options(struct dirlist *); 169int checkmask(struct sockaddr *sa); 170int chk_host(struct dirlist *, struct sockaddr *, int *, int *); 171void create_service(struct netconfig *nconf); 172void del_mlist(char *hostp, char *dirp); 173struct dirlist *dirp_search(struct dirlist *, char *); 174int do_mount(struct exportlist *, struct grouplist *, int, 175 struct xucred *, char *, int, struct statfs *); 176int do_opt(char **, char **, struct exportlist *, struct grouplist *, 177 int *, int *, struct xucred *); 178struct exportlist *ex_search(fsid_t *); 179struct exportlist *get_exp(void); 180void free_dir(struct dirlist *); 181void free_exp(struct exportlist *); 182void free_grp(struct grouplist *); 183void free_host(struct hostlist *); 184void get_exportlist(void); 185int get_host(char *, struct grouplist *, struct grouplist *); 186struct hostlist *get_ht(void); 187int get_line(void); 188void get_mountlist(void); 189int get_net(char *, struct netmsk *, int); 190void getexp_err(struct exportlist *, struct grouplist *); 191struct grouplist *get_grp(void); 192void hang_dirp(struct dirlist *, struct grouplist *, 193 struct exportlist *, int); 194void huphandler(int sig); 195int makemask(struct sockaddr_storage *ssp, int bitlen); 196void mntsrv(struct svc_req *, SVCXPRT *); 197void nextfield(char **, char **); 198void out_of_mem(void); 199void parsecred(char *, struct xucred *); 200int put_exlist(struct dirlist *, XDR *, struct dirlist *, int *, int); 201void *sa_rawaddr(struct sockaddr *sa, int *nbytes); 202int sacmp(struct sockaddr *sa1, struct sockaddr *sa2, 203 struct sockaddr *samask); 204int scan_tree(struct dirlist *, struct sockaddr *); 205static void usage(void); 206int xdr_dir(XDR *, char *); 207int xdr_explist(XDR *, caddr_t); 208int xdr_explist_brief(XDR *, caddr_t); 209int xdr_fhs(XDR *, caddr_t); 210int xdr_mlist(XDR *, caddr_t); 211void terminate(int); 212 213struct exportlist *exphead; 214struct mountlist *mlhead; 215struct grouplist *grphead; 216char *exnames_default[2] = { _PATH_EXPORTS, NULL }; 217char **exnames; 218char **hosts = NULL; 219struct xucred def_anon = { 220 XUCRED_VERSION, 221 (uid_t)-2, 222 1, 223 { (gid_t)-2 }, 224 NULL 225}; 226int force_v2 = 0; 227int resvport_only = 1; 228int nhosts = 0; 229int dir_only = 1; 230int dolog = 0; 231int got_sighup = 0; 232int xcreated = 0; 233 234char *svcport_str = NULL; 235 236int opt_flags; 237static int have_v6 = 1; 238 239int v4root_phase = 0; 240char v4root_dirpath[PATH_MAX + 1]; 241int run_v4server = 0; 242int has_publicfh = 0; 243 244struct pidfh *pfh = NULL; 245/* Bits for opt_flags above */ 246#define OP_MAPROOT 0x01 247#define OP_MAPALL 0x02 248/* 0x4 free */ 249#define OP_MASK 0x08 250#define OP_NET 0x10 251#define OP_ALLDIRS 0x40 252#define OP_HAVEMASK 0x80 /* A mask was specified or inferred. */ 253#define OP_QUIET 0x100 254#define OP_MASKLEN 0x200 255#define OP_SEC 0x400 256 257#ifdef DEBUG 258int debug = 1; 259void SYSLOG(int, const char *, ...) __printflike(2, 3); 260#define syslog SYSLOG 261#else 262int debug = 0; 263#endif 264 265/* 266 * Mountd server for NFS mount protocol as described in: 267 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 268 * The optional arguments are the exports file name 269 * default: _PATH_EXPORTS 270 * and "-n" to allow nonroot mount. 271 */ 272int 273main(argc, argv) 274 int argc; 275 char **argv; 276{ 277 fd_set readfds; 278 struct netconfig *nconf; 279 char *endptr, **hosts_bak; 280 void *nc_handle; 281 pid_t otherpid; 282 in_port_t svcport; 283 int c, k, s; 284 int maxrec = RPC_MAXDATASIZE; 285 286 /* Check that another mountd isn't already running. */ 287 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid); 288 if (pfh == NULL) { 289 if (errno == EEXIST) 290 errx(1, "mountd already running, pid: %d.", otherpid); 291 warn("cannot open or create pidfile"); 292 } 293 294 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 295 if (s < 0) 296 have_v6 = 0; 297 else 298 close(s); 299 300 while ((c = getopt(argc, argv, "2deh:lnp:r")) != -1) 301 switch (c) { 302 case '2': 303 force_v2 = 1; 304 break; 305 case 'e': 306 run_v4server = 1; 307 break; 308 case 'n': 309 resvport_only = 0; 310 break; 311 case 'r': 312 dir_only = 0; 313 break; 314 case 'd': 315 debug = debug ? 0 : 1; 316 break; 317 case 'l': 318 dolog = 1; 319 break; 320 case 'p': 321 endptr = NULL; 322 svcport = (in_port_t)strtoul(optarg, &endptr, 10); 323 if (endptr == NULL || *endptr != '\0' || 324 svcport == 0 || svcport >= IPPORT_MAX) 325 usage(); 326 svcport_str = strdup(optarg); 327 break; 328 case 'h': 329 ++nhosts; 330 hosts_bak = hosts; 331 hosts_bak = realloc(hosts, nhosts * sizeof(char *)); 332 if (hosts_bak == NULL) { 333 if (hosts != NULL) { 334 for (k = 0; k < nhosts; k++) 335 free(hosts[k]); 336 free(hosts); 337 out_of_mem(); 338 } 339 } 340 hosts = hosts_bak; 341 hosts[nhosts - 1] = strdup(optarg); 342 if (hosts[nhosts - 1] == NULL) { 343 for (k = 0; k < (nhosts - 1); k++) 344 free(hosts[k]); 345 free(hosts); 346 out_of_mem(); 347 } 348 break; 349 default: 350 usage(); 351 }; 352 353 /* 354 * If the "-e" option was specified OR only the nfsd module is 355 * found in the server, run "nfsd". 356 * Otherwise, try and run "nfsserver". 357 */ 358 if (run_v4server > 0) { 359 if (modfind("nfsd") < 0) { 360 /* Not present in kernel, try loading it */ 361 if (kldload("nfsd") < 0 || modfind("nfsd") < 0) 362 errx(1, "NFS server is not available"); 363 } 364 } else if (modfind("nfsserver") < 0 && modfind("nfsd") >= 0) { 365 run_v4server = 1; 366 } else if (modfind("nfsserver") < 0) { 367 /* Not present in kernel, try loading it */ 368 if (kldload("nfsserver") < 0 || modfind("nfsserver") < 0) 369 errx(1, "NFS server is not available"); 370 } 371 372 argc -= optind; 373 argv += optind; 374 grphead = (struct grouplist *)NULL; 375 exphead = (struct exportlist *)NULL; 376 mlhead = (struct mountlist *)NULL; 377 if (argc > 0) 378 exnames = argv; 379 else 380 exnames = exnames_default; 381 openlog("mountd", LOG_PID, LOG_DAEMON); 382 if (debug) 383 warnx("getting export list"); 384 get_exportlist(); 385 if (debug) 386 warnx("getting mount list"); 387 get_mountlist(); 388 if (debug) 389 warnx("here we go"); 390 if (debug == 0) { 391 daemon(0, 0); 392 signal(SIGINT, SIG_IGN); 393 signal(SIGQUIT, SIG_IGN); 394 } 395 signal(SIGHUP, huphandler); 396 signal(SIGTERM, terminate); 397 signal(SIGPIPE, SIG_IGN); 398 399 pidfile_write(pfh); 400 401 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); 402 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); 403 rpc_control(RPC_SVC_CONNMAXREC_SET, &maxrec); 404 405 if (!resvport_only) { 406 if (sysctlbyname("vfs.nfsrv.nfs_privport", NULL, NULL, 407 &resvport_only, sizeof(resvport_only)) != 0 && 408 errno != ENOENT) { 409 syslog(LOG_ERR, "sysctl: %m"); 410 exit(1); 411 } 412 } 413 414 /* 415 * If no hosts were specified, add a wildcard entry to bind to 416 * INADDR_ANY. Otherwise make sure 127.0.0.1 and ::1 are added to the 417 * list. 418 */ 419 if (nhosts == 0) { 420 hosts = malloc(sizeof(char**)); 421 if (hosts == NULL) 422 out_of_mem(); 423 hosts[0] = "*"; 424 nhosts = 1; 425 } else { 426 hosts_bak = hosts; 427 if (have_v6) { 428 hosts_bak = realloc(hosts, (nhosts + 2) * 429 sizeof(char *)); 430 if (hosts_bak == NULL) { 431 for (k = 0; k < nhosts; k++) 432 free(hosts[k]); 433 free(hosts); 434 out_of_mem(); 435 } else 436 hosts = hosts_bak; 437 nhosts += 2; 438 hosts[nhosts - 2] = "::1"; 439 } else { 440 hosts_bak = realloc(hosts, (nhosts + 1) * sizeof(char *)); 441 if (hosts_bak == NULL) { 442 for (k = 0; k < nhosts; k++) 443 free(hosts[k]); 444 free(hosts); 445 out_of_mem(); 446 } else { 447 nhosts += 1; 448 hosts = hosts_bak; 449 } 450 } 451 452 hosts[nhosts - 1] = "127.0.0.1"; 453 } 454 455 nc_handle = setnetconfig(); 456 while ((nconf = getnetconfig(nc_handle))) { 457 if (nconf->nc_flag & NC_VISIBLE) { 458 if (have_v6 == 0 && strcmp(nconf->nc_protofmly, 459 "inet6") == 0) { 460 /* DO NOTHING */ 461 } else 462 create_service(nconf); 463 } 464 } 465 endnetconfig(nc_handle); 466 467 if (xcreated == 0) { 468 syslog(LOG_ERR, "could not create any services"); 469 exit(1); 470 } 471 472 /* Expand svc_run() here so that we can call get_exportlist(). */ 473 for (;;) { 474 if (got_sighup) { 475 get_exportlist(); 476 got_sighup = 0; 477 } 478 readfds = svc_fdset; 479 switch (select(svc_maxfd + 1, &readfds, NULL, NULL, NULL)) { 480 case -1: 481 if (errno == EINTR) 482 continue; 483 syslog(LOG_ERR, "mountd died: select: %m"); 484 exit(1); 485 case 0: 486 continue; 487 default: 488 svc_getreqset(&readfds); 489 } 490 } 491} 492 493/* 494 * This routine creates and binds sockets on the appropriate 495 * addresses. It gets called one time for each transport and 496 * registrates the service with rpcbind on that trasport. 497 */ 498void 499create_service(struct netconfig *nconf) 500{ 501 struct addrinfo hints, *res = NULL; 502 struct sockaddr_in *sin; 503 struct sockaddr_in6 *sin6; 504 struct __rpc_sockinfo si; 505 struct netbuf servaddr; 506 SVCXPRT *transp = NULL; 507 int aicode; 508 int fd; 509 int nhostsbak; 510 int one = 1; 511 int r; 512 int registered = 0; 513 u_int32_t host_addr[4]; /* IPv4 or IPv6 */ 514 515 if ((nconf->nc_semantics != NC_TPI_CLTS) && 516 (nconf->nc_semantics != NC_TPI_COTS) && 517 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 518 return; /* not my type */ 519 520 /* 521 * XXX - using RPC library internal functions. 522 */ 523 if (!__rpc_nconf2sockinfo(nconf, &si)) { 524 syslog(LOG_ERR, "cannot get information for %s", 525 nconf->nc_netid); 526 return; 527 } 528 529 /* Get mountd's address on this transport */ 530 memset(&hints, 0, sizeof hints); 531 hints.ai_flags = AI_PASSIVE; 532 hints.ai_family = si.si_af; 533 hints.ai_socktype = si.si_socktype; 534 hints.ai_protocol = si.si_proto; 535 536 /* 537 * Bind to specific IPs if asked to 538 */ 539 nhostsbak = nhosts; 540 while (nhostsbak > 0) { 541 --nhostsbak; 542 /* 543 * XXX - using RPC library internal functions. 544 */ 545 if ((fd = __rpc_nconf2fd(nconf)) < 0) { 546 int non_fatal = 0; 547 if (errno == EPROTONOSUPPORT && 548 nconf->nc_semantics != NC_TPI_CLTS) 549 non_fatal = 1; 550 551 syslog(non_fatal ? LOG_DEBUG : LOG_ERR, 552 "cannot create socket for %s", nconf->nc_netid); 553 return; 554 } 555 556 switch (hints.ai_family) { 557 case AF_INET: 558 if (inet_pton(AF_INET, hosts[nhostsbak], 559 host_addr) == 1) { 560 hints.ai_flags &= AI_NUMERICHOST; 561 } else { 562 /* 563 * Skip if we have an AF_INET6 address. 564 */ 565 if (inet_pton(AF_INET6, hosts[nhostsbak], 566 host_addr) == 1) { 567 close(fd); 568 continue; 569 } 570 } 571 break; 572 case AF_INET6: 573 if (inet_pton(AF_INET6, hosts[nhostsbak], 574 host_addr) == 1) { 575 hints.ai_flags &= AI_NUMERICHOST; 576 } else { 577 /* 578 * Skip if we have an AF_INET address. 579 */ 580 if (inet_pton(AF_INET, hosts[nhostsbak], 581 host_addr) == 1) { 582 close(fd); 583 continue; 584 } 585 } 586 587 /* 588 * We're doing host-based access checks here, so don't 589 * allow v4-in-v6 to confuse things. The kernel will 590 * disable it by default on NFS sockets too. 591 */ 592 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, 593 sizeof one) < 0) { 594 syslog(LOG_ERR, 595 "can't disable v4-in-v6 on IPv6 socket"); 596 exit(1); 597 } 598 break; 599 default: 600 break; 601 } 602 603 /* 604 * If no hosts were specified, just bind to INADDR_ANY 605 */ 606 if (strcmp("*", hosts[nhostsbak]) == 0) { 607 if (svcport_str == NULL) { 608 res = malloc(sizeof(struct addrinfo)); 609 if (res == NULL) 610 out_of_mem(); 611 res->ai_flags = hints.ai_flags; 612 res->ai_family = hints.ai_family; 613 res->ai_protocol = hints.ai_protocol; 614 switch (res->ai_family) { 615 case AF_INET: 616 sin = malloc(sizeof(struct sockaddr_in)); 617 if (sin == NULL) 618 out_of_mem(); 619 sin->sin_family = AF_INET; 620 sin->sin_port = htons(0); 621 sin->sin_addr.s_addr = htonl(INADDR_ANY); 622 res->ai_addr = (struct sockaddr*) sin; 623 res->ai_addrlen = (socklen_t) 624 sizeof(res->ai_addr); 625 break; 626 case AF_INET6: 627 sin6 = malloc(sizeof(struct sockaddr_in6)); 628 if (sin6 == NULL) 629 out_of_mem(); 630 sin6->sin6_family = AF_INET6; 631 sin6->sin6_port = htons(0); 632 sin6->sin6_addr = in6addr_any; 633 res->ai_addr = (struct sockaddr*) sin6; 634 res->ai_addrlen = (socklen_t) 635 sizeof(res->ai_addr); 636 break; 637 default: 638 break; 639 } 640 } else { 641 if ((aicode = getaddrinfo(NULL, svcport_str, 642 &hints, &res)) != 0) { 643 syslog(LOG_ERR, 644 "cannot get local address for %s: %s", 645 nconf->nc_netid, 646 gai_strerror(aicode)); 647 continue; 648 } 649 } 650 } else { 651 if ((aicode = getaddrinfo(hosts[nhostsbak], svcport_str, 652 &hints, &res)) != 0) { 653 syslog(LOG_ERR, 654 "cannot get local address for %s: %s", 655 nconf->nc_netid, gai_strerror(aicode)); 656 continue; 657 } 658 } 659 660 r = bindresvport_sa(fd, res->ai_addr); 661 if (r != 0) { 662 syslog(LOG_ERR, "bindresvport_sa: %m"); 663 exit(1); 664 } 665 666 if (nconf->nc_semantics != NC_TPI_CLTS) 667 listen(fd, SOMAXCONN); 668 669 if (nconf->nc_semantics == NC_TPI_CLTS ) 670 transp = svc_dg_create(fd, 0, 0); 671 else 672 transp = svc_vc_create(fd, RPC_MAXDATASIZE, 673 RPC_MAXDATASIZE); 674 675 if (transp != (SVCXPRT *) NULL) { 676 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER1, mntsrv, 677 NULL)) 678 syslog(LOG_ERR, 679 "can't register %s RPCMNT_VER1 service", 680 nconf->nc_netid); 681 if (!force_v2) { 682 if (!svc_reg(transp, RPCPROG_MNT, RPCMNT_VER3, 683 mntsrv, NULL)) 684 syslog(LOG_ERR, 685 "can't register %s RPCMNT_VER3 service", 686 nconf->nc_netid); 687 } 688 } else 689 syslog(LOG_WARNING, "can't create %s services", 690 nconf->nc_netid); 691 692 if (registered == 0) { 693 registered = 1; 694 memset(&hints, 0, sizeof hints); 695 hints.ai_flags = AI_PASSIVE; 696 hints.ai_family = si.si_af; 697 hints.ai_socktype = si.si_socktype; 698 hints.ai_protocol = si.si_proto; 699 700 if (svcport_str == NULL) { 701 svcport_str = malloc(NI_MAXSERV * sizeof(char)); 702 if (svcport_str == NULL) 703 out_of_mem(); 704 705 if (getnameinfo(res->ai_addr, 706 res->ai_addr->sa_len, NULL, NI_MAXHOST, 707 svcport_str, NI_MAXSERV * sizeof(char), 708 NI_NUMERICHOST | NI_NUMERICSERV)) 709 errx(1, "Cannot get port number"); 710 } 711 712 if((aicode = getaddrinfo(NULL, svcport_str, &hints, 713 &res)) != 0) { 714 syslog(LOG_ERR, "cannot get local address: %s", 715 gai_strerror(aicode)); 716 exit(1); 717 } 718 719 servaddr.buf = malloc(res->ai_addrlen); 720 memcpy(servaddr.buf, res->ai_addr, res->ai_addrlen); 721 servaddr.len = res->ai_addrlen; 722 723 rpcb_set(RPCPROG_MNT, RPCMNT_VER1, nconf, &servaddr); 724 rpcb_set(RPCPROG_MNT, RPCMNT_VER3, nconf, &servaddr); 725 726 xcreated++; 727 freeaddrinfo(res); 728 } 729 } /* end while */ 730} 731 732static void 733usage() 734{ 735 fprintf(stderr, 736 "usage: mountd [-2] [-d] [-e] [-l] [-n] [-p <port>] [-r] " 737 "[-h <bindip>] [export_file ...]\n"); 738 exit(1); 739} 740 741/* 742 * The mount rpc service 743 */ 744void 745mntsrv(rqstp, transp) 746 struct svc_req *rqstp; 747 SVCXPRT *transp; 748{ 749 struct exportlist *ep; 750 struct dirlist *dp; 751 struct fhreturn fhr; 752 struct stat stb; 753 struct statfs fsb; 754 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 755 int lookup_failed = 1; 756 struct sockaddr *saddr; 757 u_short sport; 758 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN]; 759 int bad = 0, defset, hostset; 760 sigset_t sighup_mask; 761 762 sigemptyset(&sighup_mask); 763 sigaddset(&sighup_mask, SIGHUP); 764 saddr = svc_getrpccaller(transp)->buf; 765 switch (saddr->sa_family) { 766 case AF_INET6: 767 sport = ntohs(((struct sockaddr_in6 *)saddr)->sin6_port); 768 break; 769 case AF_INET: 770 sport = ntohs(((struct sockaddr_in *)saddr)->sin_port); 771 break; 772 default: 773 syslog(LOG_ERR, "request from unknown address family"); 774 return; 775 } 776 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host, 777 NULL, 0, 0); 778 getnameinfo(saddr, saddr->sa_len, numerichost, 779 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 780 switch (rqstp->rq_proc) { 781 case NULLPROC: 782 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 783 syslog(LOG_ERR, "can't send reply"); 784 return; 785 case RPCMNT_MOUNT: 786 if (sport >= IPPORT_RESERVED && resvport_only) { 787 syslog(LOG_NOTICE, 788 "mount request from %s from unprivileged port", 789 numerichost); 790 svcerr_weakauth(transp); 791 return; 792 } 793 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 794 syslog(LOG_NOTICE, "undecodable mount request from %s", 795 numerichost); 796 svcerr_decode(transp); 797 return; 798 } 799 800 /* 801 * Get the real pathname and make sure it is a directory 802 * or a regular file if the -r option was specified 803 * and it exists. 804 */ 805 if (realpath(rpcpath, dirpath) == NULL || 806 stat(dirpath, &stb) < 0 || 807 (!S_ISDIR(stb.st_mode) && 808 (dir_only || !S_ISREG(stb.st_mode))) || 809 statfs(dirpath, &fsb) < 0) { 810 chdir("/"); /* Just in case realpath doesn't */ 811 syslog(LOG_NOTICE, 812 "mount request from %s for non existent path %s", 813 numerichost, dirpath); 814 if (debug) 815 warnx("stat failed on %s", dirpath); 816 bad = ENOENT; /* We will send error reply later */ 817 } 818 819 /* Check in the exports list */ 820 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 821 ep = ex_search(&fsb.f_fsid); 822 hostset = defset = 0; 823 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, &hostset) || 824 ((dp = dirp_search(ep->ex_dirl, dirpath)) && 825 chk_host(dp, saddr, &defset, &hostset)) || 826 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 827 scan_tree(ep->ex_dirl, saddr) == 0))) { 828 if (bad) { 829 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 830 (caddr_t)&bad)) 831 syslog(LOG_ERR, "can't send reply"); 832 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 833 return; 834 } 835 if (hostset & DP_HOSTSET) 836 fhr.fhr_flag = hostset; 837 else 838 fhr.fhr_flag = defset; 839 fhr.fhr_vers = rqstp->rq_vers; 840 /* Get the file handle */ 841 memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 842 if (getfh(dirpath, (fhandle_t *)&fhr.fhr_fh) < 0) { 843 bad = errno; 844 syslog(LOG_ERR, "can't get fh for %s", dirpath); 845 if (!svc_sendreply(transp, (xdrproc_t)xdr_long, 846 (caddr_t)&bad)) 847 syslog(LOG_ERR, "can't send reply"); 848 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 849 return; 850 } 851 fhr.fhr_numsecflavors = ep->ex_numsecflavors; 852 fhr.fhr_secflavors = ep->ex_secflavors; 853 if (!svc_sendreply(transp, (xdrproc_t)xdr_fhs, 854 (caddr_t)&fhr)) 855 syslog(LOG_ERR, "can't send reply"); 856 if (!lookup_failed) 857 add_mlist(host, dirpath); 858 else 859 add_mlist(numerichost, dirpath); 860 if (debug) 861 warnx("mount successful"); 862 if (dolog) 863 syslog(LOG_NOTICE, 864 "mount request succeeded from %s for %s", 865 numerichost, dirpath); 866 } else { 867 bad = EACCES; 868 syslog(LOG_NOTICE, 869 "mount request denied from %s for %s", 870 numerichost, dirpath); 871 } 872 873 if (bad && !svc_sendreply(transp, (xdrproc_t)xdr_long, 874 (caddr_t)&bad)) 875 syslog(LOG_ERR, "can't send reply"); 876 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 877 return; 878 case RPCMNT_DUMP: 879 if (!svc_sendreply(transp, (xdrproc_t)xdr_mlist, (caddr_t)NULL)) 880 syslog(LOG_ERR, "can't send reply"); 881 else if (dolog) 882 syslog(LOG_NOTICE, 883 "dump request succeeded from %s", 884 numerichost); 885 return; 886 case RPCMNT_UMOUNT: 887 if (sport >= IPPORT_RESERVED && resvport_only) { 888 syslog(LOG_NOTICE, 889 "umount request from %s from unprivileged port", 890 numerichost); 891 svcerr_weakauth(transp); 892 return; 893 } 894 if (!svc_getargs(transp, (xdrproc_t)xdr_dir, rpcpath)) { 895 syslog(LOG_NOTICE, "undecodable umount request from %s", 896 numerichost); 897 svcerr_decode(transp); 898 return; 899 } 900 if (realpath(rpcpath, dirpath) == NULL) { 901 syslog(LOG_NOTICE, "umount request from %s " 902 "for non existent path %s", 903 numerichost, dirpath); 904 } 905 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 906 syslog(LOG_ERR, "can't send reply"); 907 if (!lookup_failed) 908 del_mlist(host, dirpath); 909 del_mlist(numerichost, dirpath); 910 if (dolog) 911 syslog(LOG_NOTICE, 912 "umount request succeeded from %s for %s", 913 numerichost, dirpath); 914 return; 915 case RPCMNT_UMNTALL: 916 if (sport >= IPPORT_RESERVED && resvport_only) { 917 syslog(LOG_NOTICE, 918 "umountall request from %s from unprivileged port", 919 numerichost); 920 svcerr_weakauth(transp); 921 return; 922 } 923 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, (caddr_t)NULL)) 924 syslog(LOG_ERR, "can't send reply"); 925 if (!lookup_failed) 926 del_mlist(host, NULL); 927 del_mlist(numerichost, NULL); 928 if (dolog) 929 syslog(LOG_NOTICE, 930 "umountall request succeeded from %s", 931 numerichost); 932 return; 933 case RPCMNT_EXPORT: 934 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist, (caddr_t)NULL)) 935 if (!svc_sendreply(transp, (xdrproc_t)xdr_explist_brief, 936 (caddr_t)NULL)) 937 syslog(LOG_ERR, "can't send reply"); 938 if (dolog) 939 syslog(LOG_NOTICE, 940 "export request succeeded from %s", 941 numerichost); 942 return; 943 default: 944 svcerr_noproc(transp); 945 return; 946 } 947} 948 949/* 950 * Xdr conversion for a dirpath string 951 */ 952int 953xdr_dir(xdrsp, dirp) 954 XDR *xdrsp; 955 char *dirp; 956{ 957 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 958} 959 960/* 961 * Xdr routine to generate file handle reply 962 */ 963int 964xdr_fhs(xdrsp, cp) 965 XDR *xdrsp; 966 caddr_t cp; 967{ 968 struct fhreturn *fhrp = (struct fhreturn *)cp; 969 u_long ok = 0, len, auth; 970 int i; 971 972 if (!xdr_long(xdrsp, &ok)) 973 return (0); 974 switch (fhrp->fhr_vers) { 975 case 1: 976 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 977 case 3: 978 len = NFSX_V3FH; 979 if (!xdr_long(xdrsp, &len)) 980 return (0); 981 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 982 return (0); 983 if (fhrp->fhr_numsecflavors) { 984 if (!xdr_int(xdrsp, &fhrp->fhr_numsecflavors)) 985 return (0); 986 for (i = 0; i < fhrp->fhr_numsecflavors; i++) 987 if (!xdr_int(xdrsp, &fhrp->fhr_secflavors[i])) 988 return (0); 989 return (1); 990 } else { 991 auth = AUTH_SYS; 992 len = 1; 993 if (!xdr_long(xdrsp, &len)) 994 return (0); 995 return (xdr_long(xdrsp, &auth)); 996 } 997 }; 998 return (0); 999} 1000 1001int 1002xdr_mlist(xdrsp, cp) 1003 XDR *xdrsp; 1004 caddr_t cp; 1005{ 1006 struct mountlist *mlp; 1007 int true = 1; 1008 int false = 0; 1009 char *strp; 1010 1011 mlp = mlhead; 1012 while (mlp) { 1013 if (!xdr_bool(xdrsp, &true)) 1014 return (0); 1015 strp = &mlp->ml_host[0]; 1016 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 1017 return (0); 1018 strp = &mlp->ml_dirp[0]; 1019 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 1020 return (0); 1021 mlp = mlp->ml_next; 1022 } 1023 if (!xdr_bool(xdrsp, &false)) 1024 return (0); 1025 return (1); 1026} 1027 1028/* 1029 * Xdr conversion for export list 1030 */ 1031int 1032xdr_explist_common(xdrsp, cp, brief) 1033 XDR *xdrsp; 1034 caddr_t cp; 1035 int brief; 1036{ 1037 struct exportlist *ep; 1038 int false = 0; 1039 int putdef; 1040 sigset_t sighup_mask; 1041 1042 sigemptyset(&sighup_mask); 1043 sigaddset(&sighup_mask, SIGHUP); 1044 sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 1045 ep = exphead; 1046 while (ep) { 1047 putdef = 0; 1048 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, 1049 &putdef, brief)) 1050 goto errout; 1051 if (ep->ex_defdir && putdef == 0 && 1052 put_exlist(ep->ex_defdir, xdrsp, (struct dirlist *)NULL, 1053 &putdef, brief)) 1054 goto errout; 1055 ep = ep->ex_next; 1056 } 1057 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1058 if (!xdr_bool(xdrsp, &false)) 1059 return (0); 1060 return (1); 1061errout: 1062 sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 1063 return (0); 1064} 1065 1066/* 1067 * Called from xdr_explist() to traverse the tree and export the 1068 * directory paths. 1069 */ 1070int 1071put_exlist(dp, xdrsp, adp, putdefp, brief) 1072 struct dirlist *dp; 1073 XDR *xdrsp; 1074 struct dirlist *adp; 1075 int *putdefp; 1076 int brief; 1077{ 1078 struct grouplist *grp; 1079 struct hostlist *hp; 1080 int true = 1; 1081 int false = 0; 1082 int gotalldir = 0; 1083 char *strp; 1084 1085 if (dp) { 1086 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp, brief)) 1087 return (1); 1088 if (!xdr_bool(xdrsp, &true)) 1089 return (1); 1090 strp = dp->dp_dirp; 1091 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 1092 return (1); 1093 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 1094 gotalldir = 1; 1095 *putdefp = 1; 1096 } 1097 if (brief) { 1098 if (!xdr_bool(xdrsp, &true)) 1099 return (1); 1100 strp = "(...)"; 1101 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 1102 return (1); 1103 } else if ((dp->dp_flag & DP_DEFSET) == 0 && 1104 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 1105 hp = dp->dp_hosts; 1106 while (hp) { 1107 grp = hp->ht_grp; 1108 if (grp->gr_type == GT_HOST) { 1109 if (!xdr_bool(xdrsp, &true)) 1110 return (1); 1111 strp = grp->gr_ptr.gt_addrinfo->ai_canonname; 1112 if (!xdr_string(xdrsp, &strp, 1113 RPCMNT_NAMELEN)) 1114 return (1); 1115 } else if (grp->gr_type == GT_NET) { 1116 if (!xdr_bool(xdrsp, &true)) 1117 return (1); 1118 strp = grp->gr_ptr.gt_net.nt_name; 1119 if (!xdr_string(xdrsp, &strp, 1120 RPCMNT_NAMELEN)) 1121 return (1); 1122 } 1123 hp = hp->ht_next; 1124 if (gotalldir && hp == (struct hostlist *)NULL) { 1125 hp = adp->dp_hosts; 1126 gotalldir = 0; 1127 } 1128 } 1129 } 1130 if (!xdr_bool(xdrsp, &false)) 1131 return (1); 1132 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp, brief)) 1133 return (1); 1134 } 1135 return (0); 1136} 1137 1138int 1139xdr_explist(xdrsp, cp) 1140 XDR *xdrsp; 1141 caddr_t cp; 1142{ 1143 1144 return xdr_explist_common(xdrsp, cp, 0); 1145} 1146 1147int 1148xdr_explist_brief(xdrsp, cp) 1149 XDR *xdrsp; 1150 caddr_t cp; 1151{ 1152 1153 return xdr_explist_common(xdrsp, cp, 1); 1154} 1155 1156char *line; 1157int linesize; 1158FILE *exp_file; 1159 1160/* 1161 * Get the export list from one, currently open file 1162 */ 1163static void 1164get_exportlist_one() 1165{ 1166 struct exportlist *ep, *ep2; 1167 struct grouplist *grp, *tgrp; 1168 struct exportlist **epp; 1169 struct dirlist *dirhead; 1170 struct statfs fsb; 1171 struct xucred anon; 1172 char *cp, *endcp, *dirp, *hst, *usr, *dom, savedc; 1173 int len, has_host, exflags, got_nondir, dirplen, netgrp; 1174 1175 v4root_phase = 0; 1176 dirhead = (struct dirlist *)NULL; 1177 while (get_line()) { 1178 if (debug) 1179 warnx("got line %s", line); 1180 cp = line; 1181 nextfield(&cp, &endcp); 1182 if (*cp == '#') 1183 goto nextline; 1184 1185 /* 1186 * Set defaults. 1187 */ 1188 has_host = FALSE; 1189 anon = def_anon; 1190 exflags = MNT_EXPORTED; 1191 got_nondir = 0; 1192 opt_flags = 0; 1193 ep = (struct exportlist *)NULL; 1194 dirp = NULL; 1195 1196 /* 1197 * Handle the V4 root dir. 1198 */ 1199 if (*cp == 'V' && *(cp + 1) == '4' && *(cp + 2) == ':') { 1200 /* 1201 * V4: just indicates that it is the v4 root point, 1202 * so skip over that and set v4root_phase. 1203 */ 1204 if (v4root_phase > 0) { 1205 syslog(LOG_ERR, "V4:duplicate line, ignored"); 1206 goto nextline; 1207 } 1208 v4root_phase = 1; 1209 cp += 3; 1210 nextfield(&cp, &endcp); 1211 } 1212 1213 /* 1214 * Create new exports list entry 1215 */ 1216 len = endcp-cp; 1217 tgrp = grp = get_grp(); 1218 while (len > 0) { 1219 if (len > RPCMNT_NAMELEN) { 1220 getexp_err(ep, tgrp); 1221 goto nextline; 1222 } 1223 if (*cp == '-') { 1224 if (ep == (struct exportlist *)NULL) { 1225 getexp_err(ep, tgrp); 1226 goto nextline; 1227 } 1228 if (debug) 1229 warnx("doing opt %s", cp); 1230 got_nondir = 1; 1231 if (do_opt(&cp, &endcp, ep, grp, &has_host, 1232 &exflags, &anon)) { 1233 getexp_err(ep, tgrp); 1234 goto nextline; 1235 } 1236 } else if (*cp == '/') { 1237 savedc = *endcp; 1238 *endcp = '\0'; 1239 if (v4root_phase > 1) { 1240 if (dirp != NULL) { 1241 syslog(LOG_ERR, "Multiple V4 dirs"); 1242 getexp_err(ep, tgrp); 1243 goto nextline; 1244 } 1245 } 1246 if (check_dirpath(cp) && 1247 statfs(cp, &fsb) >= 0) { 1248 if (got_nondir) { 1249 syslog(LOG_ERR, "dirs must be first"); 1250 getexp_err(ep, tgrp); 1251 goto nextline; 1252 } 1253 if (v4root_phase == 1) { 1254 if (dirp != NULL) { 1255 syslog(LOG_ERR, "Multiple V4 dirs"); 1256 getexp_err(ep, tgrp); 1257 goto nextline; 1258 } 1259 if (strlen(v4root_dirpath) == 0) { 1260 strlcpy(v4root_dirpath, cp, 1261 sizeof (v4root_dirpath)); 1262 } else if (strcmp(v4root_dirpath, cp) 1263 != 0) { 1264 syslog(LOG_ERR, 1265 "different V4 dirpath %s", cp); 1266 getexp_err(ep, tgrp); 1267 goto nextline; 1268 } 1269 dirp = cp; 1270 v4root_phase = 2; 1271 got_nondir = 1; 1272 ep = get_exp(); 1273 } else { 1274 if (ep) { 1275 if (ep->ex_fs.val[0] != 1276 fsb.f_fsid.val[0] || 1277 ep->ex_fs.val[1] != 1278 fsb.f_fsid.val[1]) { 1279 getexp_err(ep, tgrp); 1280 goto nextline; 1281 } 1282 } else { 1283 /* 1284 * See if this directory is already 1285 * in the list. 1286 */ 1287 ep = ex_search(&fsb.f_fsid); 1288 if (ep == (struct exportlist *)NULL) { 1289 ep = get_exp(); 1290 ep->ex_fs = fsb.f_fsid; 1291 ep->ex_fsdir = (char *)malloc 1292 (strlen(fsb.f_mntonname) + 1); 1293 if (ep->ex_fsdir) 1294 strcpy(ep->ex_fsdir, 1295 fsb.f_mntonname); 1296 else 1297 out_of_mem(); 1298 if (debug) 1299 warnx( 1300 "making new ep fs=0x%x,0x%x", 1301 fsb.f_fsid.val[0], 1302 fsb.f_fsid.val[1]); 1303 } else if (debug) 1304 warnx("found ep fs=0x%x,0x%x", 1305 fsb.f_fsid.val[0], 1306 fsb.f_fsid.val[1]); 1307 } 1308 1309 /* 1310 * Add dirpath to export mount point. 1311 */ 1312 dirp = add_expdir(&dirhead, cp, len); 1313 dirplen = len; 1314 } 1315 } else { 1316 getexp_err(ep, tgrp); 1317 goto nextline; 1318 } 1319 *endcp = savedc; 1320 } else { 1321 savedc = *endcp; 1322 *endcp = '\0'; 1323 got_nondir = 1; 1324 if (ep == (struct exportlist *)NULL) { 1325 getexp_err(ep, tgrp); 1326 goto nextline; 1327 } 1328 1329 /* 1330 * Get the host or netgroup. 1331 */ 1332 setnetgrent(cp); 1333 netgrp = getnetgrent(&hst, &usr, &dom); 1334 do { 1335 if (has_host) { 1336 grp->gr_next = get_grp(); 1337 grp = grp->gr_next; 1338 } 1339 if (netgrp) { 1340 if (hst == 0) { 1341 syslog(LOG_ERR, 1342 "null hostname in netgroup %s, skipping", cp); 1343 grp->gr_type = GT_IGNORE; 1344 } else if (get_host(hst, grp, tgrp)) { 1345 syslog(LOG_ERR, 1346 "bad host %s in netgroup %s, skipping", hst, cp); 1347 grp->gr_type = GT_IGNORE; 1348 } 1349 } else if (get_host(cp, grp, tgrp)) { 1350 syslog(LOG_ERR, "bad host %s, skipping", cp); 1351 grp->gr_type = GT_IGNORE; 1352 } 1353 has_host = TRUE; 1354 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 1355 endnetgrent(); 1356 *endcp = savedc; 1357 } 1358 cp = endcp; 1359 nextfield(&cp, &endcp); 1360 len = endcp - cp; 1361 } 1362 if (check_options(dirhead)) { 1363 getexp_err(ep, tgrp); 1364 goto nextline; 1365 } 1366 if (!has_host) { 1367 grp->gr_type = GT_DEFAULT; 1368 if (debug) 1369 warnx("adding a default entry"); 1370 1371 /* 1372 * Don't allow a network export coincide with a list of 1373 * host(s) on the same line. 1374 */ 1375 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1376 syslog(LOG_ERR, "network/host conflict"); 1377 getexp_err(ep, tgrp); 1378 goto nextline; 1379 1380 /* 1381 * If an export list was specified on this line, make sure 1382 * that we have at least one valid entry, otherwise skip it. 1383 */ 1384 } else { 1385 grp = tgrp; 1386 while (grp && grp->gr_type == GT_IGNORE) 1387 grp = grp->gr_next; 1388 if (! grp) { 1389 getexp_err(ep, tgrp); 1390 goto nextline; 1391 } 1392 } 1393 1394 if (v4root_phase == 1) { 1395 syslog(LOG_ERR, "V4:root, no dirp, ignored"); 1396 getexp_err(ep, tgrp); 1397 goto nextline; 1398 } 1399 1400 /* 1401 * Loop through hosts, pushing the exports into the kernel. 1402 * After loop, tgrp points to the start of the list and 1403 * grp points to the last entry in the list. 1404 */ 1405 grp = tgrp; 1406 do { 1407 if (do_mount(ep, grp, exflags, &anon, dirp, dirplen, 1408 &fsb)) { 1409 getexp_err(ep, tgrp); 1410 goto nextline; 1411 } 1412 } while (grp->gr_next && (grp = grp->gr_next)); 1413 1414 /* 1415 * For V4: don't enter in mount lists. 1416 */ 1417 if (v4root_phase > 0 && v4root_phase <= 2) { 1418 /* 1419 * Since these structures aren't used by mountd, 1420 * free them up now. 1421 */ 1422 if (ep != NULL) 1423 free_exp(ep); 1424 while (tgrp != NULL) { 1425 grp = tgrp; 1426 tgrp = tgrp->gr_next; 1427 free_grp(grp); 1428 } 1429 goto nextline; 1430 } 1431 1432 /* 1433 * Success. Update the data structures. 1434 */ 1435 if (has_host) { 1436 hang_dirp(dirhead, tgrp, ep, opt_flags); 1437 grp->gr_next = grphead; 1438 grphead = tgrp; 1439 } else { 1440 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1441 opt_flags); 1442 free_grp(grp); 1443 } 1444 dirhead = (struct dirlist *)NULL; 1445 if ((ep->ex_flag & EX_LINKED) == 0) { 1446 ep2 = exphead; 1447 epp = &exphead; 1448 1449 /* 1450 * Insert in the list in alphabetical order. 1451 */ 1452 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1453 epp = &ep2->ex_next; 1454 ep2 = ep2->ex_next; 1455 } 1456 if (ep2) 1457 ep->ex_next = ep2; 1458 *epp = ep; 1459 ep->ex_flag |= EX_LINKED; 1460 } 1461nextline: 1462 v4root_phase = 0; 1463 if (dirhead) { 1464 free_dir(dirhead); 1465 dirhead = (struct dirlist *)NULL; 1466 } 1467 } 1468} 1469 1470/* 1471 * Get the export list from all specified files 1472 */ 1473void 1474get_exportlist() 1475{ 1476 struct exportlist *ep, *ep2; 1477 struct grouplist *grp, *tgrp; 1478 struct export_args export; 1479 struct iovec *iov; 1480 struct statfs *fsp, *mntbufp; 1481 struct xvfsconf vfc; 1482 char *dirp; 1483 char errmsg[255]; 1484 int dirplen, num, i; 1485 int iovlen; 1486 int done; 1487 struct nfsex_args eargs; 1488 1489 v4root_dirpath[0] = '\0'; 1490 bzero(&export, sizeof(export)); 1491 export.ex_flags = MNT_DELEXPORT; 1492 dirp = NULL; 1493 dirplen = 0; 1494 iov = NULL; 1495 iovlen = 0; 1496 bzero(errmsg, sizeof(errmsg)); 1497 1498 /* 1499 * First, get rid of the old list 1500 */ 1501 ep = exphead; 1502 while (ep) { 1503 ep2 = ep; 1504 ep = ep->ex_next; 1505 free_exp(ep2); 1506 } 1507 exphead = (struct exportlist *)NULL; 1508 1509 grp = grphead; 1510 while (grp) { 1511 tgrp = grp; 1512 grp = grp->gr_next; 1513 free_grp(tgrp); 1514 } 1515 grphead = (struct grouplist *)NULL; 1516 1517 /* 1518 * and the old V4 root dir. 1519 */ 1520 bzero(&eargs, sizeof (eargs)); 1521 eargs.export.ex_flags = MNT_DELEXPORT; 1522 if (run_v4server > 0 && 1523 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 && 1524 errno != ENOENT) 1525 syslog(LOG_ERR, "Can't delete exports for V4:"); 1526 1527 /* 1528 * and clear flag that notes if a public fh has been exported. 1529 */ 1530 has_publicfh = 0; 1531 1532 /* 1533 * And delete exports that are in the kernel for all local 1534 * filesystems. 1535 * XXX: Should know how to handle all local exportable filesystems. 1536 */ 1537 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1538 1539 if (num > 0) { 1540 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1541 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1542 build_iovec(&iov, &iovlen, "from", NULL, 0); 1543 build_iovec(&iov, &iovlen, "update", NULL, 0); 1544 build_iovec(&iov, &iovlen, "export", &export, sizeof(export)); 1545 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 1546 } 1547 1548 for (i = 0; i < num; i++) { 1549 fsp = &mntbufp[i]; 1550 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 1551 syslog(LOG_ERR, "getvfsbyname() failed for %s", 1552 fsp->f_fstypename); 1553 continue; 1554 } 1555 1556 /* 1557 * Do not delete export for network filesystem by 1558 * passing "export" arg to nmount(). 1559 * It only makes sense to do this for local filesystems. 1560 */ 1561 if (vfc.vfc_flags & VFCF_NETWORK) 1562 continue; 1563 1564 iov[1].iov_base = fsp->f_fstypename; 1565 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 1566 iov[3].iov_base = fsp->f_mntonname; 1567 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 1568 iov[5].iov_base = fsp->f_mntfromname; 1569 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 1570 1571 if (nmount(iov, iovlen, fsp->f_flags) < 0 && 1572 errno != ENOENT && errno != ENOTSUP) { 1573 syslog(LOG_ERR, 1574 "can't delete exports for %s: %m %s", 1575 fsp->f_mntonname, errmsg); 1576 } 1577 } 1578 1579 if (iov != NULL) { 1580 /* Free strings allocated by strdup() in getmntopts.c */ 1581 free(iov[0].iov_base); /* fstype */ 1582 free(iov[2].iov_base); /* fspath */ 1583 free(iov[4].iov_base); /* from */ 1584 free(iov[6].iov_base); /* update */ 1585 free(iov[8].iov_base); /* export */ 1586 free(iov[10].iov_base); /* errmsg */ 1587 1588 /* free iov, allocated by realloc() */ 1589 free(iov); 1590 iovlen = 0; 1591 } 1592 1593 /* 1594 * Read in the exports file and build the list, calling 1595 * nmount() as we go along to push the export rules into the kernel. 1596 */ 1597 done = 0; 1598 for (i = 0; exnames[i] != NULL; i++) { 1599 if (debug) 1600 warnx("reading exports from %s", exnames[i]); 1601 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1602 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1603 continue; 1604 } 1605 get_exportlist_one(); 1606 fclose(exp_file); 1607 done++; 1608 } 1609 if (done == 0) { 1610 syslog(LOG_ERR, "can't open any exports file"); 1611 exit(2); 1612 } 1613 1614 /* 1615 * If there was no public fh, clear any previous one set. 1616 */ 1617 if (run_v4server > 0 && has_publicfh == 0) 1618 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1619} 1620 1621/* 1622 * Allocate an export list element 1623 */ 1624struct exportlist * 1625get_exp() 1626{ 1627 struct exportlist *ep; 1628 1629 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1630 if (ep == (struct exportlist *)NULL) 1631 out_of_mem(); 1632 memset(ep, 0, sizeof(struct exportlist)); 1633 return (ep); 1634} 1635 1636/* 1637 * Allocate a group list element 1638 */ 1639struct grouplist * 1640get_grp() 1641{ 1642 struct grouplist *gp; 1643 1644 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1645 if (gp == (struct grouplist *)NULL) 1646 out_of_mem(); 1647 memset(gp, 0, sizeof(struct grouplist)); 1648 return (gp); 1649} 1650 1651/* 1652 * Clean up upon an error in get_exportlist(). 1653 */ 1654void 1655getexp_err(ep, grp) 1656 struct exportlist *ep; 1657 struct grouplist *grp; 1658{ 1659 struct grouplist *tgrp; 1660 1661 if (!(opt_flags & OP_QUIET)) 1662 syslog(LOG_ERR, "bad exports list line %s", line); 1663 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1664 free_exp(ep); 1665 while (grp) { 1666 tgrp = grp; 1667 grp = grp->gr_next; 1668 free_grp(tgrp); 1669 } 1670} 1671 1672/* 1673 * Search the export list for a matching fs. 1674 */ 1675struct exportlist * 1676ex_search(fsid) 1677 fsid_t *fsid; 1678{ 1679 struct exportlist *ep; 1680 1681 ep = exphead; 1682 while (ep) { 1683 if (ep->ex_fs.val[0] == fsid->val[0] && 1684 ep->ex_fs.val[1] == fsid->val[1]) 1685 return (ep); 1686 ep = ep->ex_next; 1687 } 1688 return (ep); 1689} 1690 1691/* 1692 * Add a directory path to the list. 1693 */ 1694char * 1695add_expdir(dpp, cp, len) 1696 struct dirlist **dpp; 1697 char *cp; 1698 int len; 1699{ 1700 struct dirlist *dp; 1701 1702 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1703 if (dp == (struct dirlist *)NULL) 1704 out_of_mem(); 1705 dp->dp_left = *dpp; 1706 dp->dp_right = (struct dirlist *)NULL; 1707 dp->dp_flag = 0; 1708 dp->dp_hosts = (struct hostlist *)NULL; 1709 strcpy(dp->dp_dirp, cp); 1710 *dpp = dp; 1711 return (dp->dp_dirp); 1712} 1713 1714/* 1715 * Hang the dir list element off the dirpath binary tree as required 1716 * and update the entry for host. 1717 */ 1718void 1719hang_dirp(dp, grp, ep, flags) 1720 struct dirlist *dp; 1721 struct grouplist *grp; 1722 struct exportlist *ep; 1723 int flags; 1724{ 1725 struct hostlist *hp; 1726 struct dirlist *dp2; 1727 1728 if (flags & OP_ALLDIRS) { 1729 if (ep->ex_defdir) 1730 free((caddr_t)dp); 1731 else 1732 ep->ex_defdir = dp; 1733 if (grp == (struct grouplist *)NULL) { 1734 ep->ex_defdir->dp_flag |= DP_DEFSET; 1735 } else while (grp) { 1736 hp = get_ht(); 1737 hp->ht_grp = grp; 1738 hp->ht_next = ep->ex_defdir->dp_hosts; 1739 ep->ex_defdir->dp_hosts = hp; 1740 grp = grp->gr_next; 1741 } 1742 } else { 1743 1744 /* 1745 * Loop through the directories adding them to the tree. 1746 */ 1747 while (dp) { 1748 dp2 = dp->dp_left; 1749 add_dlist(&ep->ex_dirl, dp, grp, flags); 1750 dp = dp2; 1751 } 1752 } 1753} 1754 1755/* 1756 * Traverse the binary tree either updating a node that is already there 1757 * for the new directory or adding the new node. 1758 */ 1759void 1760add_dlist(dpp, newdp, grp, flags) 1761 struct dirlist **dpp; 1762 struct dirlist *newdp; 1763 struct grouplist *grp; 1764 int flags; 1765{ 1766 struct dirlist *dp; 1767 struct hostlist *hp; 1768 int cmp; 1769 1770 dp = *dpp; 1771 if (dp) { 1772 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1773 if (cmp > 0) { 1774 add_dlist(&dp->dp_left, newdp, grp, flags); 1775 return; 1776 } else if (cmp < 0) { 1777 add_dlist(&dp->dp_right, newdp, grp, flags); 1778 return; 1779 } else 1780 free((caddr_t)newdp); 1781 } else { 1782 dp = newdp; 1783 dp->dp_left = (struct dirlist *)NULL; 1784 *dpp = dp; 1785 } 1786 if (grp) { 1787 1788 /* 1789 * Hang all of the host(s) off of the directory point. 1790 */ 1791 do { 1792 hp = get_ht(); 1793 hp->ht_grp = grp; 1794 hp->ht_next = dp->dp_hosts; 1795 dp->dp_hosts = hp; 1796 grp = grp->gr_next; 1797 } while (grp); 1798 } else { 1799 dp->dp_flag |= DP_DEFSET; 1800 } 1801} 1802 1803/* 1804 * Search for a dirpath on the export point. 1805 */ 1806struct dirlist * 1807dirp_search(dp, dirp) 1808 struct dirlist *dp; 1809 char *dirp; 1810{ 1811 int cmp; 1812 1813 if (dp) { 1814 cmp = strcmp(dp->dp_dirp, dirp); 1815 if (cmp > 0) 1816 return (dirp_search(dp->dp_left, dirp)); 1817 else if (cmp < 0) 1818 return (dirp_search(dp->dp_right, dirp)); 1819 else 1820 return (dp); 1821 } 1822 return (dp); 1823} 1824 1825/* 1826 * Scan for a host match in a directory tree. 1827 */ 1828int 1829chk_host(dp, saddr, defsetp, hostsetp) 1830 struct dirlist *dp; 1831 struct sockaddr *saddr; 1832 int *defsetp; 1833 int *hostsetp; 1834{ 1835 struct hostlist *hp; 1836 struct grouplist *grp; 1837 struct addrinfo *ai; 1838 1839 if (dp) { 1840 if (dp->dp_flag & DP_DEFSET) 1841 *defsetp = dp->dp_flag; 1842 hp = dp->dp_hosts; 1843 while (hp) { 1844 grp = hp->ht_grp; 1845 switch (grp->gr_type) { 1846 case GT_HOST: 1847 ai = grp->gr_ptr.gt_addrinfo; 1848 for (; ai; ai = ai->ai_next) { 1849 if (!sacmp(ai->ai_addr, saddr, NULL)) { 1850 *hostsetp = 1851 (hp->ht_flag | DP_HOSTSET); 1852 return (1); 1853 } 1854 } 1855 break; 1856 case GT_NET: 1857 if (!sacmp(saddr, (struct sockaddr *) 1858 &grp->gr_ptr.gt_net.nt_net, 1859 (struct sockaddr *) 1860 &grp->gr_ptr.gt_net.nt_mask)) { 1861 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1862 return (1); 1863 } 1864 break; 1865 } 1866 hp = hp->ht_next; 1867 } 1868 } 1869 return (0); 1870} 1871 1872/* 1873 * Scan tree for a host that matches the address. 1874 */ 1875int 1876scan_tree(dp, saddr) 1877 struct dirlist *dp; 1878 struct sockaddr *saddr; 1879{ 1880 int defset, hostset; 1881 1882 if (dp) { 1883 if (scan_tree(dp->dp_left, saddr)) 1884 return (1); 1885 if (chk_host(dp, saddr, &defset, &hostset)) 1886 return (1); 1887 if (scan_tree(dp->dp_right, saddr)) 1888 return (1); 1889 } 1890 return (0); 1891} 1892 1893/* 1894 * Traverse the dirlist tree and free it up. 1895 */ 1896void 1897free_dir(dp) 1898 struct dirlist *dp; 1899{ 1900 1901 if (dp) { 1902 free_dir(dp->dp_left); 1903 free_dir(dp->dp_right); 1904 free_host(dp->dp_hosts); 1905 free((caddr_t)dp); 1906 } 1907} 1908 1909/* 1910 * Parse a colon separated list of security flavors 1911 */ 1912int 1913parsesec(seclist, ep) 1914 char *seclist; 1915 struct exportlist *ep; 1916{ 1917 char *cp, savedc; 1918 int flavor; 1919 1920 ep->ex_numsecflavors = 0; 1921 for (;;) { 1922 cp = strchr(seclist, ':'); 1923 if (cp) { 1924 savedc = *cp; 1925 *cp = '\0'; 1926 } 1927 1928 if (!strcmp(seclist, "sys")) 1929 flavor = AUTH_SYS; 1930 else if (!strcmp(seclist, "krb5")) 1931 flavor = RPCSEC_GSS_KRB5; 1932 else if (!strcmp(seclist, "krb5i")) 1933 flavor = RPCSEC_GSS_KRB5I; 1934 else if (!strcmp(seclist, "krb5p")) 1935 flavor = RPCSEC_GSS_KRB5P; 1936 else { 1937 if (cp) 1938 *cp = savedc; 1939 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 1940 return (1); 1941 } 1942 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 1943 if (cp) 1944 *cp = savedc; 1945 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 1946 return (1); 1947 } 1948 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 1949 ep->ex_numsecflavors++; 1950 if (cp) { 1951 *cp = savedc; 1952 seclist = cp + 1; 1953 } else { 1954 break; 1955 } 1956 } 1957 return (0); 1958} 1959 1960/* 1961 * Parse the option string and update fields. 1962 * Option arguments may either be -<option>=<value> or 1963 * -<option> <value> 1964 */ 1965int 1966do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr) 1967 char **cpp, **endcpp; 1968 struct exportlist *ep; 1969 struct grouplist *grp; 1970 int *has_hostp; 1971 int *exflagsp; 1972 struct xucred *cr; 1973{ 1974 char *cpoptarg, *cpoptend; 1975 char *cp, *endcp, *cpopt, savedc, savedc2; 1976 int allflag, usedarg; 1977 1978 savedc2 = '\0'; 1979 cpopt = *cpp; 1980 cpopt++; 1981 cp = *endcpp; 1982 savedc = *cp; 1983 *cp = '\0'; 1984 while (cpopt && *cpopt) { 1985 allflag = 1; 1986 usedarg = -2; 1987 if ((cpoptend = strchr(cpopt, ','))) { 1988 *cpoptend++ = '\0'; 1989 if ((cpoptarg = strchr(cpopt, '='))) 1990 *cpoptarg++ = '\0'; 1991 } else { 1992 if ((cpoptarg = strchr(cpopt, '='))) 1993 *cpoptarg++ = '\0'; 1994 else { 1995 *cp = savedc; 1996 nextfield(&cp, &endcp); 1997 **endcpp = '\0'; 1998 if (endcp > cp && *cp != '-') { 1999 cpoptarg = cp; 2000 savedc2 = *endcp; 2001 *endcp = '\0'; 2002 usedarg = 0; 2003 } 2004 } 2005 } 2006 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 2007 *exflagsp |= MNT_EXRDONLY; 2008 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 2009 !(allflag = strcmp(cpopt, "mapall")) || 2010 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 2011 usedarg++; 2012 parsecred(cpoptarg, cr); 2013 if (allflag == 0) { 2014 *exflagsp |= MNT_EXPORTANON; 2015 opt_flags |= OP_MAPALL; 2016 } else 2017 opt_flags |= OP_MAPROOT; 2018 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2019 !strcmp(cpopt, "m"))) { 2020 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2021 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2022 return (1); 2023 } 2024 usedarg++; 2025 opt_flags |= OP_MASK; 2026 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2027 !strcmp(cpopt, "n"))) { 2028 if (strchr(cpoptarg, '/') != NULL) { 2029 if (debug) 2030 fprintf(stderr, "setting OP_MASKLEN\n"); 2031 opt_flags |= OP_MASKLEN; 2032 } 2033 if (grp->gr_type != GT_NULL) { 2034 syslog(LOG_ERR, "network/host conflict"); 2035 return (1); 2036 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2037 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2038 return (1); 2039 } 2040 grp->gr_type = GT_NET; 2041 *has_hostp = 1; 2042 usedarg++; 2043 opt_flags |= OP_NET; 2044 } else if (!strcmp(cpopt, "alldirs")) { 2045 opt_flags |= OP_ALLDIRS; 2046 } else if (!strcmp(cpopt, "public")) { 2047 *exflagsp |= MNT_EXPUBLIC; 2048 } else if (!strcmp(cpopt, "webnfs")) { 2049 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2050 opt_flags |= OP_MAPALL; 2051 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2052 ep->ex_indexfile = strdup(cpoptarg); 2053 } else if (!strcmp(cpopt, "quiet")) { 2054 opt_flags |= OP_QUIET; 2055 } else if (!strcmp(cpopt, "sec")) { 2056 if (parsesec(cpoptarg, ep)) 2057 return (1); 2058 opt_flags |= OP_SEC; 2059 usedarg++; 2060 } else { 2061 syslog(LOG_ERR, "bad opt %s", cpopt); 2062 return (1); 2063 } 2064 if (usedarg >= 0) { 2065 *endcp = savedc2; 2066 **endcpp = savedc; 2067 if (usedarg > 0) { 2068 *cpp = cp; 2069 *endcpp = endcp; 2070 } 2071 return (0); 2072 } 2073 cpopt = cpoptend; 2074 } 2075 **endcpp = savedc; 2076 return (0); 2077} 2078 2079/* 2080 * Translate a character string to the corresponding list of network 2081 * addresses for a hostname. 2082 */ 2083int 2084get_host(cp, grp, tgrp) 2085 char *cp; 2086 struct grouplist *grp; 2087 struct grouplist *tgrp; 2088{ 2089 struct grouplist *checkgrp; 2090 struct addrinfo *ai, *tai, hints; 2091 int ecode; 2092 char host[NI_MAXHOST]; 2093 2094 if (grp->gr_type != GT_NULL) { 2095 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2096 return (1); 2097 } 2098 memset(&hints, 0, sizeof hints); 2099 hints.ai_flags = AI_CANONNAME; 2100 hints.ai_protocol = IPPROTO_UDP; 2101 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2102 if (ecode != 0) { 2103 syslog(LOG_ERR,"can't get address info for host %s", cp); 2104 return 1; 2105 } 2106 grp->gr_ptr.gt_addrinfo = ai; 2107 while (ai != NULL) { 2108 if (ai->ai_canonname == NULL) { 2109 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2110 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2111 strlcpy(host, "?", sizeof(host)); 2112 ai->ai_canonname = strdup(host); 2113 ai->ai_flags |= AI_CANONNAME; 2114 } 2115 if (debug) 2116 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2117 /* 2118 * Sanity check: make sure we don't already have an entry 2119 * for this host in the grouplist. 2120 */ 2121 for (checkgrp = tgrp; checkgrp != NULL; 2122 checkgrp = checkgrp->gr_next) { 2123 if (checkgrp->gr_type != GT_HOST) 2124 continue; 2125 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2126 tai = tai->ai_next) { 2127 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2128 continue; 2129 if (debug) 2130 fprintf(stderr, 2131 "ignoring duplicate host %s\n", 2132 ai->ai_canonname); 2133 grp->gr_type = GT_IGNORE; 2134 return (0); 2135 } 2136 } 2137 ai = ai->ai_next; 2138 } 2139 grp->gr_type = GT_HOST; 2140 return (0); 2141} 2142 2143/* 2144 * Free up an exports list component 2145 */ 2146void 2147free_exp(ep) 2148 struct exportlist *ep; 2149{ 2150 2151 if (ep->ex_defdir) { 2152 free_host(ep->ex_defdir->dp_hosts); 2153 free((caddr_t)ep->ex_defdir); 2154 } 2155 if (ep->ex_fsdir) 2156 free(ep->ex_fsdir); 2157 if (ep->ex_indexfile) 2158 free(ep->ex_indexfile); 2159 free_dir(ep->ex_dirl); 2160 free((caddr_t)ep); 2161} 2162 2163/* 2164 * Free hosts. 2165 */ 2166void 2167free_host(hp) 2168 struct hostlist *hp; 2169{ 2170 struct hostlist *hp2; 2171 2172 while (hp) { 2173 hp2 = hp; 2174 hp = hp->ht_next; 2175 free((caddr_t)hp2); 2176 } 2177} 2178 2179struct hostlist * 2180get_ht() 2181{ 2182 struct hostlist *hp; 2183 2184 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2185 if (hp == (struct hostlist *)NULL) 2186 out_of_mem(); 2187 hp->ht_next = (struct hostlist *)NULL; 2188 hp->ht_flag = 0; 2189 return (hp); 2190} 2191 2192/* 2193 * Out of memory, fatal 2194 */ 2195void 2196out_of_mem() 2197{ 2198 2199 syslog(LOG_ERR, "out of memory"); 2200 exit(2); 2201} 2202 2203/* 2204 * Do the nmount() syscall with the update flag to push the export info into 2205 * the kernel. 2206 */ 2207int 2208do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2209 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 2210{ 2211 struct statfs fsb1; 2212 struct addrinfo *ai; 2213 struct export_args ea, *eap; 2214 char errmsg[255]; 2215 char *cp; 2216 int done; 2217 char savedc; 2218 struct iovec *iov; 2219 int i, iovlen; 2220 int ret; 2221 struct nfsex_args nfsea; 2222 2223 if (run_v4server > 0) 2224 eap = &nfsea.export; 2225 else 2226 eap = &ea; 2227 2228 cp = NULL; 2229 savedc = '\0'; 2230 iov = NULL; 2231 iovlen = 0; 2232 ret = 0; 2233 2234 bzero(eap, sizeof (struct export_args)); 2235 bzero(errmsg, sizeof(errmsg)); 2236 eap->ex_flags = exflags; 2237 eap->ex_anon = *anoncrp; 2238 eap->ex_indexfile = ep->ex_indexfile; 2239 if (grp->gr_type == GT_HOST) 2240 ai = grp->gr_ptr.gt_addrinfo; 2241 else 2242 ai = NULL; 2243 eap->ex_numsecflavors = ep->ex_numsecflavors; 2244 for (i = 0; i < eap->ex_numsecflavors; i++) 2245 eap->ex_secflavors[i] = ep->ex_secflavors[i]; 2246 if (eap->ex_numsecflavors == 0) { 2247 eap->ex_numsecflavors = 1; 2248 eap->ex_secflavors[0] = AUTH_SYS; 2249 } 2250 done = FALSE; 2251 2252 if (v4root_phase == 0) { 2253 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2254 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2255 build_iovec(&iov, &iovlen, "from", NULL, 0); 2256 build_iovec(&iov, &iovlen, "update", NULL, 0); 2257 build_iovec(&iov, &iovlen, "export", eap, 2258 sizeof (struct export_args)); 2259 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 2260 } 2261 2262 while (!done) { 2263 switch (grp->gr_type) { 2264 case GT_HOST: 2265 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 2266 goto skip; 2267 eap->ex_addr = ai->ai_addr; 2268 eap->ex_addrlen = ai->ai_addrlen; 2269 eap->ex_masklen = 0; 2270 break; 2271 case GT_NET: 2272 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 2273 have_v6 == 0) 2274 goto skip; 2275 eap->ex_addr = 2276 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 2277 eap->ex_addrlen = 2278 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 2279 eap->ex_mask = 2280 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 2281 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 2282 break; 2283 case GT_DEFAULT: 2284 eap->ex_addr = NULL; 2285 eap->ex_addrlen = 0; 2286 eap->ex_mask = NULL; 2287 eap->ex_masklen = 0; 2288 break; 2289 case GT_IGNORE: 2290 ret = 0; 2291 goto error_exit; 2292 break; 2293 default: 2294 syslog(LOG_ERR, "bad grouptype"); 2295 if (cp) 2296 *cp = savedc; 2297 ret = 1; 2298 goto error_exit; 2299 }; 2300 2301 /* 2302 * For V4:, use the nfssvc() syscall, instead of mount(). 2303 */ 2304 if (v4root_phase == 2) { 2305 nfsea.fspec = v4root_dirpath; 2306 if (run_v4server > 0 && 2307 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 2308 syslog(LOG_ERR, "Exporting V4: failed"); 2309 return (2); 2310 } 2311 } else { 2312 /* 2313 * XXX: 2314 * Maybe I should just use the fsb->f_mntonname path 2315 * instead of looping back up the dirp to the mount 2316 * point?? 2317 * Also, needs to know how to export all types of local 2318 * exportable filesystems and not just "ufs". 2319 */ 2320 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 2321 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 2322 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 2323 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 2324 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 2325 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 2326 2327 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 2328 if (cp) 2329 *cp-- = savedc; 2330 else 2331 cp = dirp + dirplen - 1; 2332 if (opt_flags & OP_QUIET) { 2333 ret = 1; 2334 goto error_exit; 2335 } 2336 if (errno == EPERM) { 2337 if (debug) 2338 warnx("can't change attributes for %s", 2339 dirp); 2340 syslog(LOG_ERR, 2341 "can't change attributes for %s", 2342 dirp); 2343 ret = 1; 2344 goto error_exit; 2345 } 2346 if (opt_flags & OP_ALLDIRS) { 2347 if (errno == EINVAL) 2348 syslog(LOG_ERR, 2349 "-alldirs requested but %s is not a filesystem mountpoint", 2350 dirp); 2351 else 2352 syslog(LOG_ERR, 2353 "could not remount %s: %m", 2354 dirp); 2355 ret = 1; 2356 goto error_exit; 2357 } 2358 /* back up over the last component */ 2359 while (*cp == '/' && cp > dirp) 2360 cp--; 2361 while (*(cp - 1) != '/' && cp > dirp) 2362 cp--; 2363 if (cp == dirp) { 2364 if (debug) 2365 warnx("mnt unsucc"); 2366 syslog(LOG_ERR, "can't export %s %s", 2367 dirp, errmsg); 2368 ret = 1; 2369 goto error_exit; 2370 } 2371 savedc = *cp; 2372 *cp = '\0'; 2373 /* 2374 * Check that we're still on the same 2375 * filesystem. 2376 */ 2377 if (statfs(dirp, &fsb1) != 0 || 2378 bcmp(&fsb1.f_fsid, &fsb->f_fsid, 2379 sizeof (fsb1.f_fsid)) != 0) { 2380 *cp = savedc; 2381 syslog(LOG_ERR, 2382 "can't export %s %s", dirp, 2383 errmsg); 2384 ret = 1; 2385 goto error_exit; 2386 } 2387 } 2388 } 2389 2390 /* 2391 * For the experimental server: 2392 * If this is the public directory, get the file handle 2393 * and load it into the kernel via the nfssvc() syscall. 2394 */ 2395 if (run_v4server > 0 && (exflags & MNT_EXPUBLIC) != 0) { 2396 fhandle_t fh; 2397 char *public_name; 2398 2399 if (eap->ex_indexfile != NULL) 2400 public_name = eap->ex_indexfile; 2401 else 2402 public_name = dirp; 2403 if (getfh(public_name, &fh) < 0) 2404 syslog(LOG_ERR, 2405 "Can't get public fh for %s", public_name); 2406 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 2407 syslog(LOG_ERR, 2408 "Can't set public fh for %s", public_name); 2409 else 2410 has_publicfh = 1; 2411 } 2412skip: 2413 if (ai != NULL) 2414 ai = ai->ai_next; 2415 if (ai == NULL) 2416 done = TRUE; 2417 } 2418 if (cp) 2419 *cp = savedc; 2420error_exit: 2421 /* free strings allocated by strdup() in getmntopts.c */ 2422 if (iov != NULL) { 2423 free(iov[0].iov_base); /* fstype */ 2424 free(iov[2].iov_base); /* fspath */ 2425 free(iov[4].iov_base); /* from */ 2426 free(iov[6].iov_base); /* update */ 2427 free(iov[8].iov_base); /* export */ 2428 free(iov[10].iov_base); /* errmsg */ 2429 2430 /* free iov, allocated by realloc() */ 2431 free(iov); 2432 } 2433 return (ret); 2434} 2435 2436/* 2437 * Translate a net address. 2438 * 2439 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2440 */ 2441int 2442get_net(cp, net, maskflg) 2443 char *cp; 2444 struct netmsk *net; 2445 int maskflg; 2446{ 2447 struct netent *np = NULL; 2448 char *name, *p, *prefp; 2449 struct sockaddr_in sin; 2450 struct sockaddr *sa = NULL; 2451 struct addrinfo hints, *ai = NULL; 2452 char netname[NI_MAXHOST]; 2453 long preflen; 2454 2455 p = prefp = NULL; 2456 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2457 p = strchr(cp, '/'); 2458 *p = '\0'; 2459 prefp = p + 1; 2460 } 2461 2462 /* 2463 * Check for a numeric address first. We wish to avoid 2464 * possible DNS lookups in getnetbyname(). 2465 */ 2466 if (isxdigit(*cp) || *cp == ':') { 2467 memset(&hints, 0, sizeof hints); 2468 /* Ensure the mask and the network have the same family. */ 2469 if (maskflg && (opt_flags & OP_NET)) 2470 hints.ai_family = net->nt_net.ss_family; 2471 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2472 hints.ai_family = net->nt_mask.ss_family; 2473 else 2474 hints.ai_family = AF_UNSPEC; 2475 hints.ai_flags = AI_NUMERICHOST; 2476 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2477 sa = ai->ai_addr; 2478 if (sa != NULL && ai->ai_family == AF_INET) { 2479 /* 2480 * The address in `cp' is really a network address, so 2481 * use inet_network() to re-interpret this correctly. 2482 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2483 */ 2484 bzero(&sin, sizeof sin); 2485 sin.sin_family = AF_INET; 2486 sin.sin_len = sizeof sin; 2487 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2488 if (debug) 2489 fprintf(stderr, "get_net: v4 addr %s\n", 2490 inet_ntoa(sin.sin_addr)); 2491 sa = (struct sockaddr *)&sin; 2492 } 2493 } 2494 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2495 bzero(&sin, sizeof sin); 2496 sin.sin_family = AF_INET; 2497 sin.sin_len = sizeof sin; 2498 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2499 sa = (struct sockaddr *)&sin; 2500 } 2501 if (sa == NULL) 2502 goto fail; 2503 2504 if (maskflg) { 2505 /* The specified sockaddr is a mask. */ 2506 if (checkmask(sa) != 0) 2507 goto fail; 2508 bcopy(sa, &net->nt_mask, sa->sa_len); 2509 opt_flags |= OP_HAVEMASK; 2510 } else { 2511 /* The specified sockaddr is a network address. */ 2512 bcopy(sa, &net->nt_net, sa->sa_len); 2513 2514 /* Get a network name for the export list. */ 2515 if (np) { 2516 name = np->n_name; 2517 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2518 NULL, 0, NI_NUMERICHOST) == 0) { 2519 name = netname; 2520 } else { 2521 goto fail; 2522 } 2523 if ((net->nt_name = strdup(name)) == NULL) 2524 out_of_mem(); 2525 2526 /* 2527 * Extract a mask from either a "/<masklen>" suffix, or 2528 * from the class of an IPv4 address. 2529 */ 2530 if (opt_flags & OP_MASKLEN) { 2531 preflen = strtol(prefp, NULL, 10); 2532 if (preflen < 0L || preflen == LONG_MAX) 2533 goto fail; 2534 bcopy(sa, &net->nt_mask, sa->sa_len); 2535 if (makemask(&net->nt_mask, (int)preflen) != 0) 2536 goto fail; 2537 opt_flags |= OP_HAVEMASK; 2538 *p = '/'; 2539 } else if (sa->sa_family == AF_INET && 2540 (opt_flags & OP_MASK) == 0) { 2541 in_addr_t addr; 2542 2543 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2544 if (IN_CLASSA(addr)) 2545 preflen = 8; 2546 else if (IN_CLASSB(addr)) 2547 preflen = 16; 2548 else if (IN_CLASSC(addr)) 2549 preflen = 24; 2550 else if (IN_CLASSD(addr)) 2551 preflen = 28; 2552 else 2553 preflen = 32; /* XXX */ 2554 2555 bcopy(sa, &net->nt_mask, sa->sa_len); 2556 makemask(&net->nt_mask, (int)preflen); 2557 opt_flags |= OP_HAVEMASK; 2558 } 2559 } 2560 2561 if (ai) 2562 freeaddrinfo(ai); 2563 return 0; 2564 2565fail: 2566 if (ai) 2567 freeaddrinfo(ai); 2568 return 1; 2569} 2570 2571/* 2572 * Parse out the next white space separated field 2573 */ 2574void 2575nextfield(cp, endcp) 2576 char **cp; 2577 char **endcp; 2578{ 2579 char *p; 2580 2581 p = *cp; 2582 while (*p == ' ' || *p == '\t') 2583 p++; 2584 if (*p == '\n' || *p == '\0') 2585 *cp = *endcp = p; 2586 else { 2587 *cp = p++; 2588 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2589 p++; 2590 *endcp = p; 2591 } 2592} 2593 2594/* 2595 * Get an exports file line. Skip over blank lines and handle line 2596 * continuations. 2597 */ 2598int 2599get_line() 2600{ 2601 char *p, *cp; 2602 size_t len; 2603 int totlen, cont_line; 2604 2605 /* 2606 * Loop around ignoring blank lines and getting all continuation lines. 2607 */ 2608 p = line; 2609 totlen = 0; 2610 do { 2611 if ((p = fgetln(exp_file, &len)) == NULL) 2612 return (0); 2613 cp = p + len - 1; 2614 cont_line = 0; 2615 while (cp >= p && 2616 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2617 if (*cp == '\\') 2618 cont_line = 1; 2619 cp--; 2620 len--; 2621 } 2622 if (cont_line) { 2623 *++cp = ' '; 2624 len++; 2625 } 2626 if (linesize < len + totlen + 1) { 2627 linesize = len + totlen + 1; 2628 line = realloc(line, linesize); 2629 if (line == NULL) 2630 out_of_mem(); 2631 } 2632 memcpy(line + totlen, p, len); 2633 totlen += len; 2634 line[totlen] = '\0'; 2635 } while (totlen == 0 || cont_line); 2636 return (1); 2637} 2638 2639/* 2640 * Parse a description of a credential. 2641 */ 2642void 2643parsecred(namelist, cr) 2644 char *namelist; 2645 struct xucred *cr; 2646{ 2647 char *name; 2648 int cnt; 2649 char *names; 2650 struct passwd *pw; 2651 struct group *gr; 2652 gid_t groups[XU_NGROUPS + 1]; 2653 int ngroups; 2654 2655 cr->cr_version = XUCRED_VERSION; 2656 /* 2657 * Set up the unprivileged user. 2658 */ 2659 cr->cr_uid = -2; 2660 cr->cr_groups[0] = -2; 2661 cr->cr_ngroups = 1; 2662 /* 2663 * Get the user's password table entry. 2664 */ 2665 names = strsep(&namelist, " \t\n"); 2666 name = strsep(&names, ":"); 2667 if (isdigit(*name) || *name == '-') 2668 pw = getpwuid(atoi(name)); 2669 else 2670 pw = getpwnam(name); 2671 /* 2672 * Credentials specified as those of a user. 2673 */ 2674 if (names == NULL) { 2675 if (pw == NULL) { 2676 syslog(LOG_ERR, "unknown user: %s", name); 2677 return; 2678 } 2679 cr->cr_uid = pw->pw_uid; 2680 ngroups = XU_NGROUPS + 1; 2681 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2682 syslog(LOG_ERR, "too many groups"); 2683 /* 2684 * Compress out duplicate. 2685 */ 2686 cr->cr_ngroups = ngroups - 1; 2687 cr->cr_groups[0] = groups[0]; 2688 for (cnt = 2; cnt < ngroups; cnt++) 2689 cr->cr_groups[cnt - 1] = groups[cnt]; 2690 return; 2691 } 2692 /* 2693 * Explicit credential specified as a colon separated list: 2694 * uid:gid:gid:... 2695 */ 2696 if (pw != NULL) 2697 cr->cr_uid = pw->pw_uid; 2698 else if (isdigit(*name) || *name == '-') 2699 cr->cr_uid = atoi(name); 2700 else { 2701 syslog(LOG_ERR, "unknown user: %s", name); 2702 return; 2703 } 2704 cr->cr_ngroups = 0; 2705 while (names != NULL && *names != '\0' && cr->cr_ngroups < XU_NGROUPS) { 2706 name = strsep(&names, ":"); 2707 if (isdigit(*name) || *name == '-') { 2708 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2709 } else { 2710 if ((gr = getgrnam(name)) == NULL) { 2711 syslog(LOG_ERR, "unknown group: %s", name); 2712 continue; 2713 } 2714 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2715 } 2716 } 2717 if (names != NULL && *names != '\0' && cr->cr_ngroups == XU_NGROUPS) 2718 syslog(LOG_ERR, "too many groups"); 2719} 2720 2721#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 2722/* 2723 * Routines that maintain the remote mounttab 2724 */ 2725void 2726get_mountlist() 2727{ 2728 struct mountlist *mlp, **mlpp; 2729 char *host, *dirp, *cp; 2730 char str[STRSIZ]; 2731 FILE *mlfile; 2732 2733 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2734 if (errno == ENOENT) 2735 return; 2736 else { 2737 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 2738 return; 2739 } 2740 } 2741 mlpp = &mlhead; 2742 while (fgets(str, STRSIZ, mlfile) != NULL) { 2743 cp = str; 2744 host = strsep(&cp, " \t\n"); 2745 dirp = strsep(&cp, " \t\n"); 2746 if (host == NULL || dirp == NULL) 2747 continue; 2748 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2749 if (mlp == (struct mountlist *)NULL) 2750 out_of_mem(); 2751 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 2752 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2753 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2754 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2755 mlp->ml_next = (struct mountlist *)NULL; 2756 *mlpp = mlp; 2757 mlpp = &mlp->ml_next; 2758 } 2759 fclose(mlfile); 2760} 2761 2762void 2763del_mlist(char *hostp, char *dirp) 2764{ 2765 struct mountlist *mlp, **mlpp; 2766 struct mountlist *mlp2; 2767 FILE *mlfile; 2768 int fnd = 0; 2769 2770 mlpp = &mlhead; 2771 mlp = mlhead; 2772 while (mlp) { 2773 if (!strcmp(mlp->ml_host, hostp) && 2774 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2775 fnd = 1; 2776 mlp2 = mlp; 2777 *mlpp = mlp = mlp->ml_next; 2778 free((caddr_t)mlp2); 2779 } else { 2780 mlpp = &mlp->ml_next; 2781 mlp = mlp->ml_next; 2782 } 2783 } 2784 if (fnd) { 2785 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2786 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 2787 return; 2788 } 2789 mlp = mlhead; 2790 while (mlp) { 2791 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2792 mlp = mlp->ml_next; 2793 } 2794 fclose(mlfile); 2795 } 2796} 2797 2798void 2799add_mlist(hostp, dirp) 2800 char *hostp, *dirp; 2801{ 2802 struct mountlist *mlp, **mlpp; 2803 FILE *mlfile; 2804 2805 mlpp = &mlhead; 2806 mlp = mlhead; 2807 while (mlp) { 2808 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2809 return; 2810 mlpp = &mlp->ml_next; 2811 mlp = mlp->ml_next; 2812 } 2813 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2814 if (mlp == (struct mountlist *)NULL) 2815 out_of_mem(); 2816 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2817 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2818 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2819 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2820 mlp->ml_next = (struct mountlist *)NULL; 2821 *mlpp = mlp; 2822 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2823 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 2824 return; 2825 } 2826 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2827 fclose(mlfile); 2828} 2829 2830/* 2831 * Free up a group list. 2832 */ 2833void 2834free_grp(grp) 2835 struct grouplist *grp; 2836{ 2837 if (grp->gr_type == GT_HOST) { 2838 if (grp->gr_ptr.gt_addrinfo != NULL) 2839 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 2840 } else if (grp->gr_type == GT_NET) { 2841 if (grp->gr_ptr.gt_net.nt_name) 2842 free(grp->gr_ptr.gt_net.nt_name); 2843 } 2844 free((caddr_t)grp); 2845} 2846 2847#ifdef DEBUG 2848void 2849SYSLOG(int pri, const char *fmt, ...) 2850{ 2851 va_list ap; 2852 2853 va_start(ap, fmt); 2854 vfprintf(stderr, fmt, ap); 2855 va_end(ap); 2856} 2857#endif /* DEBUG */ 2858 2859/* 2860 * Check options for consistency. 2861 */ 2862int 2863check_options(dp) 2864 struct dirlist *dp; 2865{ 2866 2867 if (v4root_phase == 0 && dp == NULL) 2868 return (1); 2869 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 2870 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 2871 return (1); 2872 } 2873 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2874 syslog(LOG_ERR, "-mask requires -network"); 2875 return (1); 2876 } 2877 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 2878 syslog(LOG_ERR, "-network requires mask specification"); 2879 return (1); 2880 } 2881 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 2882 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 2883 return (1); 2884 } 2885 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2886 syslog(LOG_ERR, "-alldirs has multiple directories"); 2887 return (1); 2888 } 2889 if (v4root_phase > 0 && 2890 (opt_flags & 2891 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 2892 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 2893 return (1); 2894 } 2895 return (0); 2896} 2897 2898/* 2899 * Check an absolute directory path for any symbolic links. Return true 2900 */ 2901int 2902check_dirpath(dirp) 2903 char *dirp; 2904{ 2905 char *cp; 2906 int ret = 1; 2907 struct stat sb; 2908 2909 cp = dirp + 1; 2910 while (*cp && ret) { 2911 if (*cp == '/') { 2912 *cp = '\0'; 2913 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2914 ret = 0; 2915 *cp = '/'; 2916 } 2917 cp++; 2918 } 2919 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2920 ret = 0; 2921 return (ret); 2922} 2923 2924/* 2925 * Make a netmask according to the specified prefix length. The ss_family 2926 * and other non-address fields must be initialised before calling this. 2927 */ 2928int 2929makemask(struct sockaddr_storage *ssp, int bitlen) 2930{ 2931 u_char *p; 2932 int bits, i, len; 2933 2934 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 2935 return (-1); 2936 if (bitlen > len * CHAR_BIT) 2937 return (-1); 2938 2939 for (i = 0; i < len; i++) { 2940 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 2941 *p++ = (1 << bits) - 1; 2942 bitlen -= bits; 2943 } 2944 return 0; 2945} 2946 2947/* 2948 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 2949 * is acceptable (i.e. of the form 1...10....0). 2950 */ 2951int 2952checkmask(struct sockaddr *sa) 2953{ 2954 u_char *mask; 2955 int i, len; 2956 2957 if ((mask = sa_rawaddr(sa, &len)) == NULL) 2958 return (-1); 2959 2960 for (i = 0; i < len; i++) 2961 if (mask[i] != 0xff) 2962 break; 2963 if (i < len) { 2964 if (~mask[i] & (u_char)(~mask[i] + 1)) 2965 return (-1); 2966 i++; 2967 } 2968 for (; i < len; i++) 2969 if (mask[i] != 0) 2970 return (-1); 2971 return (0); 2972} 2973 2974/* 2975 * Compare two sockaddrs according to a specified mask. Return zero if 2976 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 2977 * If samask is NULL, perform a full comparision. 2978 */ 2979int 2980sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 2981{ 2982 unsigned char *p1, *p2, *mask; 2983 int len, i; 2984 2985 if (sa1->sa_family != sa2->sa_family || 2986 (p1 = sa_rawaddr(sa1, &len)) == NULL || 2987 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 2988 return (1); 2989 2990 switch (sa1->sa_family) { 2991 case AF_INET6: 2992 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 2993 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 2994 return (1); 2995 break; 2996 } 2997 2998 /* Simple binary comparison if no mask specified. */ 2999 if (samask == NULL) 3000 return (memcmp(p1, p2, len)); 3001 3002 /* Set up the mask, and do a mask-based comparison. */ 3003 if (sa1->sa_family != samask->sa_family || 3004 (mask = sa_rawaddr(samask, NULL)) == NULL) 3005 return (1); 3006 3007 for (i = 0; i < len; i++) 3008 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 3009 return (1); 3010 return (0); 3011} 3012 3013/* 3014 * Return a pointer to the part of the sockaddr that contains the 3015 * raw address, and set *nbytes to its length in bytes. Returns 3016 * NULL if the address family is unknown. 3017 */ 3018void * 3019sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3020 void *p; 3021 int len; 3022 3023 switch (sa->sa_family) { 3024 case AF_INET: 3025 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3026 p = &((struct sockaddr_in *)sa)->sin_addr; 3027 break; 3028 case AF_INET6: 3029 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3030 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3031 break; 3032 default: 3033 p = NULL; 3034 len = 0; 3035 } 3036 3037 if (nbytes != NULL) 3038 *nbytes = len; 3039 return (p); 3040} 3041 3042void 3043huphandler(int sig) 3044{ 3045 got_sighup = 1; 3046} 3047 3048void terminate(sig) 3049int sig; 3050{ 3051 pidfile_remove(pfh); 3052 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); 3053 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); 3054 exit (0); 3055} 3056 3057