mountd.c revision 192993
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 192993 2009-05-28 20:28:13Z 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 goto nextline; 1419 1420 /* 1421 * Success. Update the data structures. 1422 */ 1423 if (has_host) { 1424 hang_dirp(dirhead, tgrp, ep, opt_flags); 1425 grp->gr_next = grphead; 1426 grphead = tgrp; 1427 } else { 1428 hang_dirp(dirhead, (struct grouplist *)NULL, ep, 1429 opt_flags); 1430 free_grp(grp); 1431 } 1432 dirhead = (struct dirlist *)NULL; 1433 if ((ep->ex_flag & EX_LINKED) == 0) { 1434 ep2 = exphead; 1435 epp = &exphead; 1436 1437 /* 1438 * Insert in the list in alphabetical order. 1439 */ 1440 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1441 epp = &ep2->ex_next; 1442 ep2 = ep2->ex_next; 1443 } 1444 if (ep2) 1445 ep->ex_next = ep2; 1446 *epp = ep; 1447 ep->ex_flag |= EX_LINKED; 1448 } 1449nextline: 1450 v4root_phase = 0; 1451 if (dirhead) { 1452 free_dir(dirhead); 1453 dirhead = (struct dirlist *)NULL; 1454 } 1455 } 1456} 1457 1458/* 1459 * Get the export list from all specified files 1460 */ 1461void 1462get_exportlist() 1463{ 1464 struct exportlist *ep, *ep2; 1465 struct grouplist *grp, *tgrp; 1466 struct export_args export; 1467 struct iovec *iov; 1468 struct statfs *fsp, *mntbufp; 1469 struct xvfsconf vfc; 1470 char *dirp; 1471 char errmsg[255]; 1472 int dirplen, num, i; 1473 int iovlen; 1474 int done; 1475 struct nfsex_args eargs; 1476 1477 v4root_dirpath[0] = '\0'; 1478 bzero(&export, sizeof(export)); 1479 export.ex_flags = MNT_DELEXPORT; 1480 dirp = NULL; 1481 dirplen = 0; 1482 iov = NULL; 1483 iovlen = 0; 1484 bzero(errmsg, sizeof(errmsg)); 1485 1486 /* 1487 * First, get rid of the old list 1488 */ 1489 ep = exphead; 1490 while (ep) { 1491 ep2 = ep; 1492 ep = ep->ex_next; 1493 free_exp(ep2); 1494 } 1495 exphead = (struct exportlist *)NULL; 1496 1497 grp = grphead; 1498 while (grp) { 1499 tgrp = grp; 1500 grp = grp->gr_next; 1501 free_grp(tgrp); 1502 } 1503 grphead = (struct grouplist *)NULL; 1504 1505 /* 1506 * and the old V4 root dir. 1507 */ 1508 bzero(&eargs, sizeof (eargs)); 1509 eargs.export.ex_flags = MNT_DELEXPORT; 1510 if (run_v4server > 0 && 1511 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&eargs) < 0 && 1512 errno != ENOENT) 1513 syslog(LOG_ERR, "Can't delete exports for V4:"); 1514 1515 /* 1516 * and clear flag that notes if a public fh has been exported. 1517 */ 1518 has_publicfh = 0; 1519 1520 /* 1521 * And delete exports that are in the kernel for all local 1522 * filesystems. 1523 * XXX: Should know how to handle all local exportable filesystems. 1524 */ 1525 num = getmntinfo(&mntbufp, MNT_NOWAIT); 1526 1527 if (num > 0) { 1528 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 1529 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 1530 build_iovec(&iov, &iovlen, "from", NULL, 0); 1531 build_iovec(&iov, &iovlen, "update", NULL, 0); 1532 build_iovec(&iov, &iovlen, "export", &export, sizeof(export)); 1533 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 1534 } 1535 1536 for (i = 0; i < num; i++) { 1537 fsp = &mntbufp[i]; 1538 if (getvfsbyname(fsp->f_fstypename, &vfc) != 0) { 1539 syslog(LOG_ERR, "getvfsbyname() failed for %s", 1540 fsp->f_fstypename); 1541 continue; 1542 } 1543 1544 /* 1545 * Do not delete export for network filesystem by 1546 * passing "export" arg to nmount(). 1547 * It only makes sense to do this for local filesystems. 1548 */ 1549 if (vfc.vfc_flags & VFCF_NETWORK) 1550 continue; 1551 1552 iov[1].iov_base = fsp->f_fstypename; 1553 iov[1].iov_len = strlen(fsp->f_fstypename) + 1; 1554 iov[3].iov_base = fsp->f_mntonname; 1555 iov[3].iov_len = strlen(fsp->f_mntonname) + 1; 1556 iov[5].iov_base = fsp->f_mntfromname; 1557 iov[5].iov_len = strlen(fsp->f_mntfromname) + 1; 1558 1559 if (nmount(iov, iovlen, fsp->f_flags) < 0 && 1560 errno != ENOENT && errno != ENOTSUP) { 1561 syslog(LOG_ERR, 1562 "can't delete exports for %s: %m %s", 1563 fsp->f_mntonname, errmsg); 1564 } 1565 } 1566 1567 if (iov != NULL) { 1568 /* Free strings allocated by strdup() in getmntopts.c */ 1569 free(iov[0].iov_base); /* fstype */ 1570 free(iov[2].iov_base); /* fspath */ 1571 free(iov[4].iov_base); /* from */ 1572 free(iov[6].iov_base); /* update */ 1573 free(iov[8].iov_base); /* export */ 1574 free(iov[10].iov_base); /* errmsg */ 1575 1576 /* free iov, allocated by realloc() */ 1577 free(iov); 1578 iovlen = 0; 1579 } 1580 1581 /* 1582 * Read in the exports file and build the list, calling 1583 * nmount() as we go along to push the export rules into the kernel. 1584 */ 1585 done = 0; 1586 for (i = 0; exnames[i] != NULL; i++) { 1587 if (debug) 1588 warnx("reading exports from %s", exnames[i]); 1589 if ((exp_file = fopen(exnames[i], "r")) == NULL) { 1590 syslog(LOG_WARNING, "can't open %s", exnames[i]); 1591 continue; 1592 } 1593 get_exportlist_one(); 1594 fclose(exp_file); 1595 done++; 1596 } 1597 if (done == 0) { 1598 syslog(LOG_ERR, "can't open any exports file"); 1599 exit(2); 1600 } 1601 1602 /* 1603 * If there was no public fh, clear any previous one set. 1604 */ 1605 if (run_v4server > 0 && has_publicfh == 0) 1606 (void) nfssvc(NFSSVC_NOPUBLICFH, NULL); 1607} 1608 1609/* 1610 * Allocate an export list element 1611 */ 1612struct exportlist * 1613get_exp() 1614{ 1615 struct exportlist *ep; 1616 1617 ep = (struct exportlist *)malloc(sizeof (struct exportlist)); 1618 if (ep == (struct exportlist *)NULL) 1619 out_of_mem(); 1620 memset(ep, 0, sizeof(struct exportlist)); 1621 return (ep); 1622} 1623 1624/* 1625 * Allocate a group list element 1626 */ 1627struct grouplist * 1628get_grp() 1629{ 1630 struct grouplist *gp; 1631 1632 gp = (struct grouplist *)malloc(sizeof (struct grouplist)); 1633 if (gp == (struct grouplist *)NULL) 1634 out_of_mem(); 1635 memset(gp, 0, sizeof(struct grouplist)); 1636 return (gp); 1637} 1638 1639/* 1640 * Clean up upon an error in get_exportlist(). 1641 */ 1642void 1643getexp_err(ep, grp) 1644 struct exportlist *ep; 1645 struct grouplist *grp; 1646{ 1647 struct grouplist *tgrp; 1648 1649 if (!(opt_flags & OP_QUIET)) 1650 syslog(LOG_ERR, "bad exports list line %s", line); 1651 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1652 free_exp(ep); 1653 while (grp) { 1654 tgrp = grp; 1655 grp = grp->gr_next; 1656 free_grp(tgrp); 1657 } 1658} 1659 1660/* 1661 * Search the export list for a matching fs. 1662 */ 1663struct exportlist * 1664ex_search(fsid) 1665 fsid_t *fsid; 1666{ 1667 struct exportlist *ep; 1668 1669 ep = exphead; 1670 while (ep) { 1671 if (ep->ex_fs.val[0] == fsid->val[0] && 1672 ep->ex_fs.val[1] == fsid->val[1]) 1673 return (ep); 1674 ep = ep->ex_next; 1675 } 1676 return (ep); 1677} 1678 1679/* 1680 * Add a directory path to the list. 1681 */ 1682char * 1683add_expdir(dpp, cp, len) 1684 struct dirlist **dpp; 1685 char *cp; 1686 int len; 1687{ 1688 struct dirlist *dp; 1689 1690 dp = (struct dirlist *)malloc(sizeof (struct dirlist) + len); 1691 if (dp == (struct dirlist *)NULL) 1692 out_of_mem(); 1693 dp->dp_left = *dpp; 1694 dp->dp_right = (struct dirlist *)NULL; 1695 dp->dp_flag = 0; 1696 dp->dp_hosts = (struct hostlist *)NULL; 1697 strcpy(dp->dp_dirp, cp); 1698 *dpp = dp; 1699 return (dp->dp_dirp); 1700} 1701 1702/* 1703 * Hang the dir list element off the dirpath binary tree as required 1704 * and update the entry for host. 1705 */ 1706void 1707hang_dirp(dp, grp, ep, flags) 1708 struct dirlist *dp; 1709 struct grouplist *grp; 1710 struct exportlist *ep; 1711 int flags; 1712{ 1713 struct hostlist *hp; 1714 struct dirlist *dp2; 1715 1716 if (flags & OP_ALLDIRS) { 1717 if (ep->ex_defdir) 1718 free((caddr_t)dp); 1719 else 1720 ep->ex_defdir = dp; 1721 if (grp == (struct grouplist *)NULL) { 1722 ep->ex_defdir->dp_flag |= DP_DEFSET; 1723 } else while (grp) { 1724 hp = get_ht(); 1725 hp->ht_grp = grp; 1726 hp->ht_next = ep->ex_defdir->dp_hosts; 1727 ep->ex_defdir->dp_hosts = hp; 1728 grp = grp->gr_next; 1729 } 1730 } else { 1731 1732 /* 1733 * Loop through the directories adding them to the tree. 1734 */ 1735 while (dp) { 1736 dp2 = dp->dp_left; 1737 add_dlist(&ep->ex_dirl, dp, grp, flags); 1738 dp = dp2; 1739 } 1740 } 1741} 1742 1743/* 1744 * Traverse the binary tree either updating a node that is already there 1745 * for the new directory or adding the new node. 1746 */ 1747void 1748add_dlist(dpp, newdp, grp, flags) 1749 struct dirlist **dpp; 1750 struct dirlist *newdp; 1751 struct grouplist *grp; 1752 int flags; 1753{ 1754 struct dirlist *dp; 1755 struct hostlist *hp; 1756 int cmp; 1757 1758 dp = *dpp; 1759 if (dp) { 1760 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1761 if (cmp > 0) { 1762 add_dlist(&dp->dp_left, newdp, grp, flags); 1763 return; 1764 } else if (cmp < 0) { 1765 add_dlist(&dp->dp_right, newdp, grp, flags); 1766 return; 1767 } else 1768 free((caddr_t)newdp); 1769 } else { 1770 dp = newdp; 1771 dp->dp_left = (struct dirlist *)NULL; 1772 *dpp = dp; 1773 } 1774 if (grp) { 1775 1776 /* 1777 * Hang all of the host(s) off of the directory point. 1778 */ 1779 do { 1780 hp = get_ht(); 1781 hp->ht_grp = grp; 1782 hp->ht_next = dp->dp_hosts; 1783 dp->dp_hosts = hp; 1784 grp = grp->gr_next; 1785 } while (grp); 1786 } else { 1787 dp->dp_flag |= DP_DEFSET; 1788 } 1789} 1790 1791/* 1792 * Search for a dirpath on the export point. 1793 */ 1794struct dirlist * 1795dirp_search(dp, dirp) 1796 struct dirlist *dp; 1797 char *dirp; 1798{ 1799 int cmp; 1800 1801 if (dp) { 1802 cmp = strcmp(dp->dp_dirp, dirp); 1803 if (cmp > 0) 1804 return (dirp_search(dp->dp_left, dirp)); 1805 else if (cmp < 0) 1806 return (dirp_search(dp->dp_right, dirp)); 1807 else 1808 return (dp); 1809 } 1810 return (dp); 1811} 1812 1813/* 1814 * Scan for a host match in a directory tree. 1815 */ 1816int 1817chk_host(dp, saddr, defsetp, hostsetp) 1818 struct dirlist *dp; 1819 struct sockaddr *saddr; 1820 int *defsetp; 1821 int *hostsetp; 1822{ 1823 struct hostlist *hp; 1824 struct grouplist *grp; 1825 struct addrinfo *ai; 1826 1827 if (dp) { 1828 if (dp->dp_flag & DP_DEFSET) 1829 *defsetp = dp->dp_flag; 1830 hp = dp->dp_hosts; 1831 while (hp) { 1832 grp = hp->ht_grp; 1833 switch (grp->gr_type) { 1834 case GT_HOST: 1835 ai = grp->gr_ptr.gt_addrinfo; 1836 for (; ai; ai = ai->ai_next) { 1837 if (!sacmp(ai->ai_addr, saddr, NULL)) { 1838 *hostsetp = 1839 (hp->ht_flag | DP_HOSTSET); 1840 return (1); 1841 } 1842 } 1843 break; 1844 case GT_NET: 1845 if (!sacmp(saddr, (struct sockaddr *) 1846 &grp->gr_ptr.gt_net.nt_net, 1847 (struct sockaddr *) 1848 &grp->gr_ptr.gt_net.nt_mask)) { 1849 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1850 return (1); 1851 } 1852 break; 1853 } 1854 hp = hp->ht_next; 1855 } 1856 } 1857 return (0); 1858} 1859 1860/* 1861 * Scan tree for a host that matches the address. 1862 */ 1863int 1864scan_tree(dp, saddr) 1865 struct dirlist *dp; 1866 struct sockaddr *saddr; 1867{ 1868 int defset, hostset; 1869 1870 if (dp) { 1871 if (scan_tree(dp->dp_left, saddr)) 1872 return (1); 1873 if (chk_host(dp, saddr, &defset, &hostset)) 1874 return (1); 1875 if (scan_tree(dp->dp_right, saddr)) 1876 return (1); 1877 } 1878 return (0); 1879} 1880 1881/* 1882 * Traverse the dirlist tree and free it up. 1883 */ 1884void 1885free_dir(dp) 1886 struct dirlist *dp; 1887{ 1888 1889 if (dp) { 1890 free_dir(dp->dp_left); 1891 free_dir(dp->dp_right); 1892 free_host(dp->dp_hosts); 1893 free((caddr_t)dp); 1894 } 1895} 1896 1897/* 1898 * Parse a colon separated list of security flavors 1899 */ 1900int 1901parsesec(seclist, ep) 1902 char *seclist; 1903 struct exportlist *ep; 1904{ 1905 char *cp, savedc; 1906 int flavor; 1907 1908 ep->ex_numsecflavors = 0; 1909 for (;;) { 1910 cp = strchr(seclist, ':'); 1911 if (cp) { 1912 savedc = *cp; 1913 *cp = '\0'; 1914 } 1915 1916 if (!strcmp(seclist, "sys")) 1917 flavor = AUTH_SYS; 1918 else if (!strcmp(seclist, "krb5")) 1919 flavor = RPCSEC_GSS_KRB5; 1920 else if (!strcmp(seclist, "krb5i")) 1921 flavor = RPCSEC_GSS_KRB5I; 1922 else if (!strcmp(seclist, "krb5p")) 1923 flavor = RPCSEC_GSS_KRB5P; 1924 else { 1925 if (cp) 1926 *cp = savedc; 1927 syslog(LOG_ERR, "bad sec flavor: %s", seclist); 1928 return (1); 1929 } 1930 if (ep->ex_numsecflavors == MAXSECFLAVORS) { 1931 if (cp) 1932 *cp = savedc; 1933 syslog(LOG_ERR, "too many sec flavors: %s", seclist); 1934 return (1); 1935 } 1936 ep->ex_secflavors[ep->ex_numsecflavors] = flavor; 1937 ep->ex_numsecflavors++; 1938 if (cp) { 1939 *cp = savedc; 1940 seclist = cp + 1; 1941 } else { 1942 break; 1943 } 1944 } 1945 return (0); 1946} 1947 1948/* 1949 * Parse the option string and update fields. 1950 * Option arguments may either be -<option>=<value> or 1951 * -<option> <value> 1952 */ 1953int 1954do_opt(cpp, endcpp, ep, grp, has_hostp, exflagsp, cr) 1955 char **cpp, **endcpp; 1956 struct exportlist *ep; 1957 struct grouplist *grp; 1958 int *has_hostp; 1959 int *exflagsp; 1960 struct xucred *cr; 1961{ 1962 char *cpoptarg, *cpoptend; 1963 char *cp, *endcp, *cpopt, savedc, savedc2; 1964 int allflag, usedarg; 1965 1966 savedc2 = '\0'; 1967 cpopt = *cpp; 1968 cpopt++; 1969 cp = *endcpp; 1970 savedc = *cp; 1971 *cp = '\0'; 1972 while (cpopt && *cpopt) { 1973 allflag = 1; 1974 usedarg = -2; 1975 if ((cpoptend = strchr(cpopt, ','))) { 1976 *cpoptend++ = '\0'; 1977 if ((cpoptarg = strchr(cpopt, '='))) 1978 *cpoptarg++ = '\0'; 1979 } else { 1980 if ((cpoptarg = strchr(cpopt, '='))) 1981 *cpoptarg++ = '\0'; 1982 else { 1983 *cp = savedc; 1984 nextfield(&cp, &endcp); 1985 **endcpp = '\0'; 1986 if (endcp > cp && *cp != '-') { 1987 cpoptarg = cp; 1988 savedc2 = *endcp; 1989 *endcp = '\0'; 1990 usedarg = 0; 1991 } 1992 } 1993 } 1994 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 1995 *exflagsp |= MNT_EXRDONLY; 1996 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 1997 !(allflag = strcmp(cpopt, "mapall")) || 1998 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 1999 usedarg++; 2000 parsecred(cpoptarg, cr); 2001 if (allflag == 0) { 2002 *exflagsp |= MNT_EXPORTANON; 2003 opt_flags |= OP_MAPALL; 2004 } else 2005 opt_flags |= OP_MAPROOT; 2006 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 2007 !strcmp(cpopt, "m"))) { 2008 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 2009 syslog(LOG_ERR, "bad mask: %s", cpoptarg); 2010 return (1); 2011 } 2012 usedarg++; 2013 opt_flags |= OP_MASK; 2014 } else if (cpoptarg && (!strcmp(cpopt, "network") || 2015 !strcmp(cpopt, "n"))) { 2016 if (strchr(cpoptarg, '/') != NULL) { 2017 if (debug) 2018 fprintf(stderr, "setting OP_MASKLEN\n"); 2019 opt_flags |= OP_MASKLEN; 2020 } 2021 if (grp->gr_type != GT_NULL) { 2022 syslog(LOG_ERR, "network/host conflict"); 2023 return (1); 2024 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 2025 syslog(LOG_ERR, "bad net: %s", cpoptarg); 2026 return (1); 2027 } 2028 grp->gr_type = GT_NET; 2029 *has_hostp = 1; 2030 usedarg++; 2031 opt_flags |= OP_NET; 2032 } else if (!strcmp(cpopt, "alldirs")) { 2033 opt_flags |= OP_ALLDIRS; 2034 } else if (!strcmp(cpopt, "public")) { 2035 *exflagsp |= MNT_EXPUBLIC; 2036 } else if (!strcmp(cpopt, "webnfs")) { 2037 *exflagsp |= (MNT_EXPUBLIC|MNT_EXRDONLY|MNT_EXPORTANON); 2038 opt_flags |= OP_MAPALL; 2039 } else if (cpoptarg && !strcmp(cpopt, "index")) { 2040 ep->ex_indexfile = strdup(cpoptarg); 2041 } else if (!strcmp(cpopt, "quiet")) { 2042 opt_flags |= OP_QUIET; 2043 } else if (!strcmp(cpopt, "sec")) { 2044 if (parsesec(cpoptarg, ep)) 2045 return (1); 2046 opt_flags |= OP_SEC; 2047 usedarg++; 2048 } else { 2049 syslog(LOG_ERR, "bad opt %s", cpopt); 2050 return (1); 2051 } 2052 if (usedarg >= 0) { 2053 *endcp = savedc2; 2054 **endcpp = savedc; 2055 if (usedarg > 0) { 2056 *cpp = cp; 2057 *endcpp = endcp; 2058 } 2059 return (0); 2060 } 2061 cpopt = cpoptend; 2062 } 2063 **endcpp = savedc; 2064 return (0); 2065} 2066 2067/* 2068 * Translate a character string to the corresponding list of network 2069 * addresses for a hostname. 2070 */ 2071int 2072get_host(cp, grp, tgrp) 2073 char *cp; 2074 struct grouplist *grp; 2075 struct grouplist *tgrp; 2076{ 2077 struct grouplist *checkgrp; 2078 struct addrinfo *ai, *tai, hints; 2079 int ecode; 2080 char host[NI_MAXHOST]; 2081 2082 if (grp->gr_type != GT_NULL) { 2083 syslog(LOG_ERR, "Bad netgroup type for ip host %s", cp); 2084 return (1); 2085 } 2086 memset(&hints, 0, sizeof hints); 2087 hints.ai_flags = AI_CANONNAME; 2088 hints.ai_protocol = IPPROTO_UDP; 2089 ecode = getaddrinfo(cp, NULL, &hints, &ai); 2090 if (ecode != 0) { 2091 syslog(LOG_ERR,"can't get address info for host %s", cp); 2092 return 1; 2093 } 2094 grp->gr_ptr.gt_addrinfo = ai; 2095 while (ai != NULL) { 2096 if (ai->ai_canonname == NULL) { 2097 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 2098 sizeof host, NULL, 0, NI_NUMERICHOST) != 0) 2099 strlcpy(host, "?", sizeof(host)); 2100 ai->ai_canonname = strdup(host); 2101 ai->ai_flags |= AI_CANONNAME; 2102 } 2103 if (debug) 2104 fprintf(stderr, "got host %s\n", ai->ai_canonname); 2105 /* 2106 * Sanity check: make sure we don't already have an entry 2107 * for this host in the grouplist. 2108 */ 2109 for (checkgrp = tgrp; checkgrp != NULL; 2110 checkgrp = checkgrp->gr_next) { 2111 if (checkgrp->gr_type != GT_HOST) 2112 continue; 2113 for (tai = checkgrp->gr_ptr.gt_addrinfo; tai != NULL; 2114 tai = tai->ai_next) { 2115 if (sacmp(tai->ai_addr, ai->ai_addr, NULL) != 0) 2116 continue; 2117 if (debug) 2118 fprintf(stderr, 2119 "ignoring duplicate host %s\n", 2120 ai->ai_canonname); 2121 grp->gr_type = GT_IGNORE; 2122 return (0); 2123 } 2124 } 2125 ai = ai->ai_next; 2126 } 2127 grp->gr_type = GT_HOST; 2128 return (0); 2129} 2130 2131/* 2132 * Free up an exports list component 2133 */ 2134void 2135free_exp(ep) 2136 struct exportlist *ep; 2137{ 2138 2139 if (ep->ex_defdir) { 2140 free_host(ep->ex_defdir->dp_hosts); 2141 free((caddr_t)ep->ex_defdir); 2142 } 2143 if (ep->ex_fsdir) 2144 free(ep->ex_fsdir); 2145 if (ep->ex_indexfile) 2146 free(ep->ex_indexfile); 2147 free_dir(ep->ex_dirl); 2148 free((caddr_t)ep); 2149} 2150 2151/* 2152 * Free hosts. 2153 */ 2154void 2155free_host(hp) 2156 struct hostlist *hp; 2157{ 2158 struct hostlist *hp2; 2159 2160 while (hp) { 2161 hp2 = hp; 2162 hp = hp->ht_next; 2163 free((caddr_t)hp2); 2164 } 2165} 2166 2167struct hostlist * 2168get_ht() 2169{ 2170 struct hostlist *hp; 2171 2172 hp = (struct hostlist *)malloc(sizeof (struct hostlist)); 2173 if (hp == (struct hostlist *)NULL) 2174 out_of_mem(); 2175 hp->ht_next = (struct hostlist *)NULL; 2176 hp->ht_flag = 0; 2177 return (hp); 2178} 2179 2180/* 2181 * Out of memory, fatal 2182 */ 2183void 2184out_of_mem() 2185{ 2186 2187 syslog(LOG_ERR, "out of memory"); 2188 exit(2); 2189} 2190 2191/* 2192 * Do the nmount() syscall with the update flag to push the export info into 2193 * the kernel. 2194 */ 2195int 2196do_mount(struct exportlist *ep, struct grouplist *grp, int exflags, 2197 struct xucred *anoncrp, char *dirp, int dirplen, struct statfs *fsb) 2198{ 2199 struct statfs fsb1; 2200 struct addrinfo *ai; 2201 struct export_args ea, *eap; 2202 char errmsg[255]; 2203 char *cp; 2204 int done; 2205 char savedc; 2206 struct iovec *iov; 2207 int i, iovlen; 2208 int ret; 2209 struct nfsex_args nfsea; 2210 2211 if (run_v4server > 0) 2212 eap = &nfsea.export; 2213 else 2214 eap = &ea; 2215 2216 cp = NULL; 2217 savedc = '\0'; 2218 iov = NULL; 2219 iovlen = 0; 2220 ret = 0; 2221 2222 bzero(eap, sizeof (struct export_args)); 2223 bzero(errmsg, sizeof(errmsg)); 2224 eap->ex_flags = exflags; 2225 eap->ex_anon = *anoncrp; 2226 eap->ex_indexfile = ep->ex_indexfile; 2227 if (grp->gr_type == GT_HOST) 2228 ai = grp->gr_ptr.gt_addrinfo; 2229 else 2230 ai = NULL; 2231 eap->ex_numsecflavors = ep->ex_numsecflavors; 2232 for (i = 0; i < eap->ex_numsecflavors; i++) 2233 eap->ex_secflavors[i] = ep->ex_secflavors[i]; 2234 if (eap->ex_numsecflavors == 0) { 2235 eap->ex_numsecflavors = 1; 2236 eap->ex_secflavors[0] = AUTH_SYS; 2237 } 2238 done = FALSE; 2239 2240 if (v4root_phase == 0) { 2241 build_iovec(&iov, &iovlen, "fstype", NULL, 0); 2242 build_iovec(&iov, &iovlen, "fspath", NULL, 0); 2243 build_iovec(&iov, &iovlen, "from", NULL, 0); 2244 build_iovec(&iov, &iovlen, "update", NULL, 0); 2245 build_iovec(&iov, &iovlen, "export", eap, 2246 sizeof (struct export_args)); 2247 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg)); 2248 } 2249 2250 while (!done) { 2251 switch (grp->gr_type) { 2252 case GT_HOST: 2253 if (ai->ai_addr->sa_family == AF_INET6 && have_v6 == 0) 2254 goto skip; 2255 eap->ex_addr = ai->ai_addr; 2256 eap->ex_addrlen = ai->ai_addrlen; 2257 eap->ex_masklen = 0; 2258 break; 2259 case GT_NET: 2260 if (grp->gr_ptr.gt_net.nt_net.ss_family == AF_INET6 && 2261 have_v6 == 0) 2262 goto skip; 2263 eap->ex_addr = 2264 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_net; 2265 eap->ex_addrlen = 2266 ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_net)->sa_len; 2267 eap->ex_mask = 2268 (struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask; 2269 eap->ex_masklen = ((struct sockaddr *)&grp->gr_ptr.gt_net.nt_mask)->sa_len; 2270 break; 2271 case GT_DEFAULT: 2272 eap->ex_addr = NULL; 2273 eap->ex_addrlen = 0; 2274 eap->ex_mask = NULL; 2275 eap->ex_masklen = 0; 2276 break; 2277 case GT_IGNORE: 2278 ret = 0; 2279 goto error_exit; 2280 break; 2281 default: 2282 syslog(LOG_ERR, "bad grouptype"); 2283 if (cp) 2284 *cp = savedc; 2285 ret = 1; 2286 goto error_exit; 2287 }; 2288 2289 /* 2290 * For V4:, use the nfssvc() syscall, instead of mount(). 2291 */ 2292 if (v4root_phase == 2) { 2293 nfsea.fspec = v4root_dirpath; 2294 if (run_v4server > 0 && 2295 nfssvc(NFSSVC_V4ROOTEXPORT, (caddr_t)&nfsea) < 0) { 2296 syslog(LOG_ERR, "Exporting V4: failed"); 2297 return (2); 2298 } 2299 } else { 2300 /* 2301 * XXX: 2302 * Maybe I should just use the fsb->f_mntonname path 2303 * instead of looping back up the dirp to the mount 2304 * point?? 2305 * Also, needs to know how to export all types of local 2306 * exportable filesystems and not just "ufs". 2307 */ 2308 iov[1].iov_base = fsb->f_fstypename; /* "fstype" */ 2309 iov[1].iov_len = strlen(fsb->f_fstypename) + 1; 2310 iov[3].iov_base = fsb->f_mntonname; /* "fspath" */ 2311 iov[3].iov_len = strlen(fsb->f_mntonname) + 1; 2312 iov[5].iov_base = fsb->f_mntfromname; /* "from" */ 2313 iov[5].iov_len = strlen(fsb->f_mntfromname) + 1; 2314 2315 while (nmount(iov, iovlen, fsb->f_flags) < 0) { 2316 if (cp) 2317 *cp-- = savedc; 2318 else 2319 cp = dirp + dirplen - 1; 2320 if (opt_flags & OP_QUIET) { 2321 ret = 1; 2322 goto error_exit; 2323 } 2324 if (errno == EPERM) { 2325 if (debug) 2326 warnx("can't change attributes for %s", 2327 dirp); 2328 syslog(LOG_ERR, 2329 "can't change attributes for %s", 2330 dirp); 2331 ret = 1; 2332 goto error_exit; 2333 } 2334 if (opt_flags & OP_ALLDIRS) { 2335 if (errno == EINVAL) 2336 syslog(LOG_ERR, 2337 "-alldirs requested but %s is not a filesystem mountpoint", 2338 dirp); 2339 else 2340 syslog(LOG_ERR, 2341 "could not remount %s: %m", 2342 dirp); 2343 ret = 1; 2344 goto error_exit; 2345 } 2346 /* back up over the last component */ 2347 while (*cp == '/' && cp > dirp) 2348 cp--; 2349 while (*(cp - 1) != '/' && cp > dirp) 2350 cp--; 2351 if (cp == dirp) { 2352 if (debug) 2353 warnx("mnt unsucc"); 2354 syslog(LOG_ERR, "can't export %s %s", 2355 dirp, errmsg); 2356 ret = 1; 2357 goto error_exit; 2358 } 2359 savedc = *cp; 2360 *cp = '\0'; 2361 /* 2362 * Check that we're still on the same 2363 * filesystem. 2364 */ 2365 if (statfs(dirp, &fsb1) != 0 || 2366 bcmp(&fsb1.f_fsid, &fsb->f_fsid, 2367 sizeof (fsb1.f_fsid)) != 0) { 2368 *cp = savedc; 2369 syslog(LOG_ERR, 2370 "can't export %s %s", dirp, 2371 errmsg); 2372 ret = 1; 2373 goto error_exit; 2374 } 2375 } 2376 } 2377 2378 /* 2379 * For the experimental server: 2380 * If this is the public directory, get the file handle 2381 * and load it into the kernel via the nfssvc() syscall. 2382 */ 2383 if (run_v4server > 0 && (exflags & MNT_EXPUBLIC) != 0) { 2384 fhandle_t fh; 2385 char *public_name; 2386 2387 if (eap->ex_indexfile != NULL) 2388 public_name = eap->ex_indexfile; 2389 else 2390 public_name = dirp; 2391 if (getfh(public_name, &fh) < 0) 2392 syslog(LOG_ERR, 2393 "Can't get public fh for %s", public_name); 2394 else if (nfssvc(NFSSVC_PUBLICFH, (caddr_t)&fh) < 0) 2395 syslog(LOG_ERR, 2396 "Can't set public fh for %s", public_name); 2397 else 2398 has_publicfh = 1; 2399 } 2400skip: 2401 if (ai != NULL) 2402 ai = ai->ai_next; 2403 if (ai == NULL) 2404 done = TRUE; 2405 } 2406 if (cp) 2407 *cp = savedc; 2408error_exit: 2409 /* free strings allocated by strdup() in getmntopts.c */ 2410 if (iov != NULL) { 2411 free(iov[0].iov_base); /* fstype */ 2412 free(iov[2].iov_base); /* fspath */ 2413 free(iov[4].iov_base); /* from */ 2414 free(iov[6].iov_base); /* update */ 2415 free(iov[8].iov_base); /* export */ 2416 free(iov[10].iov_base); /* errmsg */ 2417 2418 /* free iov, allocated by realloc() */ 2419 free(iov); 2420 } 2421 return (ret); 2422} 2423 2424/* 2425 * Translate a net address. 2426 * 2427 * If `maskflg' is nonzero, then `cp' is a netmask, not a network address. 2428 */ 2429int 2430get_net(cp, net, maskflg) 2431 char *cp; 2432 struct netmsk *net; 2433 int maskflg; 2434{ 2435 struct netent *np = NULL; 2436 char *name, *p, *prefp; 2437 struct sockaddr_in sin; 2438 struct sockaddr *sa = NULL; 2439 struct addrinfo hints, *ai = NULL; 2440 char netname[NI_MAXHOST]; 2441 long preflen; 2442 2443 p = prefp = NULL; 2444 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2445 p = strchr(cp, '/'); 2446 *p = '\0'; 2447 prefp = p + 1; 2448 } 2449 2450 /* 2451 * Check for a numeric address first. We wish to avoid 2452 * possible DNS lookups in getnetbyname(). 2453 */ 2454 if (isxdigit(*cp) || *cp == ':') { 2455 memset(&hints, 0, sizeof hints); 2456 /* Ensure the mask and the network have the same family. */ 2457 if (maskflg && (opt_flags & OP_NET)) 2458 hints.ai_family = net->nt_net.ss_family; 2459 else if (!maskflg && (opt_flags & OP_HAVEMASK)) 2460 hints.ai_family = net->nt_mask.ss_family; 2461 else 2462 hints.ai_family = AF_UNSPEC; 2463 hints.ai_flags = AI_NUMERICHOST; 2464 if (getaddrinfo(cp, NULL, &hints, &ai) == 0) 2465 sa = ai->ai_addr; 2466 if (sa != NULL && ai->ai_family == AF_INET) { 2467 /* 2468 * The address in `cp' is really a network address, so 2469 * use inet_network() to re-interpret this correctly. 2470 * e.g. "127.1" means 127.1.0.0, not 127.0.0.1. 2471 */ 2472 bzero(&sin, sizeof sin); 2473 sin.sin_family = AF_INET; 2474 sin.sin_len = sizeof sin; 2475 sin.sin_addr = inet_makeaddr(inet_network(cp), 0); 2476 if (debug) 2477 fprintf(stderr, "get_net: v4 addr %s\n", 2478 inet_ntoa(sin.sin_addr)); 2479 sa = (struct sockaddr *)&sin; 2480 } 2481 } 2482 if (sa == NULL && (np = getnetbyname(cp)) != NULL) { 2483 bzero(&sin, sizeof sin); 2484 sin.sin_family = AF_INET; 2485 sin.sin_len = sizeof sin; 2486 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2487 sa = (struct sockaddr *)&sin; 2488 } 2489 if (sa == NULL) 2490 goto fail; 2491 2492 if (maskflg) { 2493 /* The specified sockaddr is a mask. */ 2494 if (checkmask(sa) != 0) 2495 goto fail; 2496 bcopy(sa, &net->nt_mask, sa->sa_len); 2497 opt_flags |= OP_HAVEMASK; 2498 } else { 2499 /* The specified sockaddr is a network address. */ 2500 bcopy(sa, &net->nt_net, sa->sa_len); 2501 2502 /* Get a network name for the export list. */ 2503 if (np) { 2504 name = np->n_name; 2505 } else if (getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2506 NULL, 0, NI_NUMERICHOST) == 0) { 2507 name = netname; 2508 } else { 2509 goto fail; 2510 } 2511 if ((net->nt_name = strdup(name)) == NULL) 2512 out_of_mem(); 2513 2514 /* 2515 * Extract a mask from either a "/<masklen>" suffix, or 2516 * from the class of an IPv4 address. 2517 */ 2518 if (opt_flags & OP_MASKLEN) { 2519 preflen = strtol(prefp, NULL, 10); 2520 if (preflen < 0L || preflen == LONG_MAX) 2521 goto fail; 2522 bcopy(sa, &net->nt_mask, sa->sa_len); 2523 if (makemask(&net->nt_mask, (int)preflen) != 0) 2524 goto fail; 2525 opt_flags |= OP_HAVEMASK; 2526 *p = '/'; 2527 } else if (sa->sa_family == AF_INET && 2528 (opt_flags & OP_MASK) == 0) { 2529 in_addr_t addr; 2530 2531 addr = ((struct sockaddr_in *)sa)->sin_addr.s_addr; 2532 if (IN_CLASSA(addr)) 2533 preflen = 8; 2534 else if (IN_CLASSB(addr)) 2535 preflen = 16; 2536 else if (IN_CLASSC(addr)) 2537 preflen = 24; 2538 else if (IN_CLASSD(addr)) 2539 preflen = 28; 2540 else 2541 preflen = 32; /* XXX */ 2542 2543 bcopy(sa, &net->nt_mask, sa->sa_len); 2544 makemask(&net->nt_mask, (int)preflen); 2545 opt_flags |= OP_HAVEMASK; 2546 } 2547 } 2548 2549 if (ai) 2550 freeaddrinfo(ai); 2551 return 0; 2552 2553fail: 2554 if (ai) 2555 freeaddrinfo(ai); 2556 return 1; 2557} 2558 2559/* 2560 * Parse out the next white space separated field 2561 */ 2562void 2563nextfield(cp, endcp) 2564 char **cp; 2565 char **endcp; 2566{ 2567 char *p; 2568 2569 p = *cp; 2570 while (*p == ' ' || *p == '\t') 2571 p++; 2572 if (*p == '\n' || *p == '\0') 2573 *cp = *endcp = p; 2574 else { 2575 *cp = p++; 2576 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2577 p++; 2578 *endcp = p; 2579 } 2580} 2581 2582/* 2583 * Get an exports file line. Skip over blank lines and handle line 2584 * continuations. 2585 */ 2586int 2587get_line() 2588{ 2589 char *p, *cp; 2590 size_t len; 2591 int totlen, cont_line; 2592 2593 /* 2594 * Loop around ignoring blank lines and getting all continuation lines. 2595 */ 2596 p = line; 2597 totlen = 0; 2598 do { 2599 if ((p = fgetln(exp_file, &len)) == NULL) 2600 return (0); 2601 cp = p + len - 1; 2602 cont_line = 0; 2603 while (cp >= p && 2604 (*cp == ' ' || *cp == '\t' || *cp == '\n' || *cp == '\\')) { 2605 if (*cp == '\\') 2606 cont_line = 1; 2607 cp--; 2608 len--; 2609 } 2610 if (cont_line) { 2611 *++cp = ' '; 2612 len++; 2613 } 2614 if (linesize < len + totlen + 1) { 2615 linesize = len + totlen + 1; 2616 line = realloc(line, linesize); 2617 if (line == NULL) 2618 out_of_mem(); 2619 } 2620 memcpy(line + totlen, p, len); 2621 totlen += len; 2622 line[totlen] = '\0'; 2623 } while (totlen == 0 || cont_line); 2624 return (1); 2625} 2626 2627/* 2628 * Parse a description of a credential. 2629 */ 2630void 2631parsecred(namelist, cr) 2632 char *namelist; 2633 struct xucred *cr; 2634{ 2635 char *name; 2636 int cnt; 2637 char *names; 2638 struct passwd *pw; 2639 struct group *gr; 2640 gid_t groups[NGROUPS + 1]; 2641 int ngroups; 2642 2643 cr->cr_version = XUCRED_VERSION; 2644 /* 2645 * Set up the unprivileged user. 2646 */ 2647 cr->cr_uid = -2; 2648 cr->cr_groups[0] = -2; 2649 cr->cr_ngroups = 1; 2650 /* 2651 * Get the user's password table entry. 2652 */ 2653 names = strsep(&namelist, " \t\n"); 2654 name = strsep(&names, ":"); 2655 if (isdigit(*name) || *name == '-') 2656 pw = getpwuid(atoi(name)); 2657 else 2658 pw = getpwnam(name); 2659 /* 2660 * Credentials specified as those of a user. 2661 */ 2662 if (names == NULL) { 2663 if (pw == NULL) { 2664 syslog(LOG_ERR, "unknown user: %s", name); 2665 return; 2666 } 2667 cr->cr_uid = pw->pw_uid; 2668 ngroups = NGROUPS + 1; 2669 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2670 syslog(LOG_ERR, "too many groups"); 2671 /* 2672 * Compress out duplicate. 2673 */ 2674 cr->cr_ngroups = ngroups - 1; 2675 cr->cr_groups[0] = groups[0]; 2676 for (cnt = 2; cnt < ngroups; cnt++) 2677 cr->cr_groups[cnt - 1] = groups[cnt]; 2678 return; 2679 } 2680 /* 2681 * Explicit credential specified as a colon separated list: 2682 * uid:gid:gid:... 2683 */ 2684 if (pw != NULL) 2685 cr->cr_uid = pw->pw_uid; 2686 else if (isdigit(*name) || *name == '-') 2687 cr->cr_uid = atoi(name); 2688 else { 2689 syslog(LOG_ERR, "unknown user: %s", name); 2690 return; 2691 } 2692 cr->cr_ngroups = 0; 2693 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) { 2694 name = strsep(&names, ":"); 2695 if (isdigit(*name) || *name == '-') { 2696 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2697 } else { 2698 if ((gr = getgrnam(name)) == NULL) { 2699 syslog(LOG_ERR, "unknown group: %s", name); 2700 continue; 2701 } 2702 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2703 } 2704 } 2705 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS) 2706 syslog(LOG_ERR, "too many groups"); 2707} 2708 2709#define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 2710/* 2711 * Routines that maintain the remote mounttab 2712 */ 2713void 2714get_mountlist() 2715{ 2716 struct mountlist *mlp, **mlpp; 2717 char *host, *dirp, *cp; 2718 char str[STRSIZ]; 2719 FILE *mlfile; 2720 2721 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2722 if (errno == ENOENT) 2723 return; 2724 else { 2725 syslog(LOG_ERR, "can't open %s", _PATH_RMOUNTLIST); 2726 return; 2727 } 2728 } 2729 mlpp = &mlhead; 2730 while (fgets(str, STRSIZ, mlfile) != NULL) { 2731 cp = str; 2732 host = strsep(&cp, " \t\n"); 2733 dirp = strsep(&cp, " \t\n"); 2734 if (host == NULL || dirp == NULL) 2735 continue; 2736 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2737 if (mlp == (struct mountlist *)NULL) 2738 out_of_mem(); 2739 strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 2740 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2741 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2742 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2743 mlp->ml_next = (struct mountlist *)NULL; 2744 *mlpp = mlp; 2745 mlpp = &mlp->ml_next; 2746 } 2747 fclose(mlfile); 2748} 2749 2750void 2751del_mlist(char *hostp, char *dirp) 2752{ 2753 struct mountlist *mlp, **mlpp; 2754 struct mountlist *mlp2; 2755 FILE *mlfile; 2756 int fnd = 0; 2757 2758 mlpp = &mlhead; 2759 mlp = mlhead; 2760 while (mlp) { 2761 if (!strcmp(mlp->ml_host, hostp) && 2762 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2763 fnd = 1; 2764 mlp2 = mlp; 2765 *mlpp = mlp = mlp->ml_next; 2766 free((caddr_t)mlp2); 2767 } else { 2768 mlpp = &mlp->ml_next; 2769 mlp = mlp->ml_next; 2770 } 2771 } 2772 if (fnd) { 2773 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2774 syslog(LOG_ERR,"can't update %s", _PATH_RMOUNTLIST); 2775 return; 2776 } 2777 mlp = mlhead; 2778 while (mlp) { 2779 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2780 mlp = mlp->ml_next; 2781 } 2782 fclose(mlfile); 2783 } 2784} 2785 2786void 2787add_mlist(hostp, dirp) 2788 char *hostp, *dirp; 2789{ 2790 struct mountlist *mlp, **mlpp; 2791 FILE *mlfile; 2792 2793 mlpp = &mlhead; 2794 mlp = mlhead; 2795 while (mlp) { 2796 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2797 return; 2798 mlpp = &mlp->ml_next; 2799 mlp = mlp->ml_next; 2800 } 2801 mlp = (struct mountlist *)malloc(sizeof (*mlp)); 2802 if (mlp == (struct mountlist *)NULL) 2803 out_of_mem(); 2804 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2805 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2806 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2807 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2808 mlp->ml_next = (struct mountlist *)NULL; 2809 *mlpp = mlp; 2810 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2811 syslog(LOG_ERR, "can't update %s", _PATH_RMOUNTLIST); 2812 return; 2813 } 2814 fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2815 fclose(mlfile); 2816} 2817 2818/* 2819 * Free up a group list. 2820 */ 2821void 2822free_grp(grp) 2823 struct grouplist *grp; 2824{ 2825 if (grp->gr_type == GT_HOST) { 2826 if (grp->gr_ptr.gt_addrinfo != NULL) 2827 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 2828 } else if (grp->gr_type == GT_NET) { 2829 if (grp->gr_ptr.gt_net.nt_name) 2830 free(grp->gr_ptr.gt_net.nt_name); 2831 } 2832 free((caddr_t)grp); 2833} 2834 2835#ifdef DEBUG 2836void 2837SYSLOG(int pri, const char *fmt, ...) 2838{ 2839 va_list ap; 2840 2841 va_start(ap, fmt); 2842 vfprintf(stderr, fmt, ap); 2843 va_end(ap); 2844} 2845#endif /* DEBUG */ 2846 2847/* 2848 * Check options for consistency. 2849 */ 2850int 2851check_options(dp) 2852 struct dirlist *dp; 2853{ 2854 2855 if (v4root_phase == 0 && dp == NULL) 2856 return (1); 2857 if ((opt_flags & (OP_MAPROOT | OP_MAPALL)) == (OP_MAPROOT | OP_MAPALL)) { 2858 syslog(LOG_ERR, "-mapall and -maproot mutually exclusive"); 2859 return (1); 2860 } 2861 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2862 syslog(LOG_ERR, "-mask requires -network"); 2863 return (1); 2864 } 2865 if ((opt_flags & OP_NET) && (opt_flags & OP_HAVEMASK) == 0) { 2866 syslog(LOG_ERR, "-network requires mask specification"); 2867 return (1); 2868 } 2869 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN)) { 2870 syslog(LOG_ERR, "-mask and /masklen are mutually exclusive"); 2871 return (1); 2872 } 2873 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2874 syslog(LOG_ERR, "-alldirs has multiple directories"); 2875 return (1); 2876 } 2877 if (v4root_phase > 0 && 2878 (opt_flags & 2879 ~(OP_SEC | OP_MASK | OP_NET | OP_HAVEMASK | OP_MASKLEN)) != 0) { 2880 syslog(LOG_ERR,"only -sec,-net,-mask options allowed on V4:"); 2881 return (1); 2882 } 2883 return (0); 2884} 2885 2886/* 2887 * Check an absolute directory path for any symbolic links. Return true 2888 */ 2889int 2890check_dirpath(dirp) 2891 char *dirp; 2892{ 2893 char *cp; 2894 int ret = 1; 2895 struct stat sb; 2896 2897 cp = dirp + 1; 2898 while (*cp && ret) { 2899 if (*cp == '/') { 2900 *cp = '\0'; 2901 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2902 ret = 0; 2903 *cp = '/'; 2904 } 2905 cp++; 2906 } 2907 if (lstat(dirp, &sb) < 0 || !S_ISDIR(sb.st_mode)) 2908 ret = 0; 2909 return (ret); 2910} 2911 2912/* 2913 * Make a netmask according to the specified prefix length. The ss_family 2914 * and other non-address fields must be initialised before calling this. 2915 */ 2916int 2917makemask(struct sockaddr_storage *ssp, int bitlen) 2918{ 2919 u_char *p; 2920 int bits, i, len; 2921 2922 if ((p = sa_rawaddr((struct sockaddr *)ssp, &len)) == NULL) 2923 return (-1); 2924 if (bitlen > len * CHAR_BIT) 2925 return (-1); 2926 2927 for (i = 0; i < len; i++) { 2928 bits = (bitlen > CHAR_BIT) ? CHAR_BIT : bitlen; 2929 *p++ = (1 << bits) - 1; 2930 bitlen -= bits; 2931 } 2932 return 0; 2933} 2934 2935/* 2936 * Check that the sockaddr is a valid netmask. Returns 0 if the mask 2937 * is acceptable (i.e. of the form 1...10....0). 2938 */ 2939int 2940checkmask(struct sockaddr *sa) 2941{ 2942 u_char *mask; 2943 int i, len; 2944 2945 if ((mask = sa_rawaddr(sa, &len)) == NULL) 2946 return (-1); 2947 2948 for (i = 0; i < len; i++) 2949 if (mask[i] != 0xff) 2950 break; 2951 if (i < len) { 2952 if (~mask[i] & (u_char)(~mask[i] + 1)) 2953 return (-1); 2954 i++; 2955 } 2956 for (; i < len; i++) 2957 if (mask[i] != 0) 2958 return (-1); 2959 return (0); 2960} 2961 2962/* 2963 * Compare two sockaddrs according to a specified mask. Return zero if 2964 * `sa1' matches `sa2' when filtered by the netmask in `samask'. 2965 * If samask is NULL, perform a full comparision. 2966 */ 2967int 2968sacmp(struct sockaddr *sa1, struct sockaddr *sa2, struct sockaddr *samask) 2969{ 2970 unsigned char *p1, *p2, *mask; 2971 int len, i; 2972 2973 if (sa1->sa_family != sa2->sa_family || 2974 (p1 = sa_rawaddr(sa1, &len)) == NULL || 2975 (p2 = sa_rawaddr(sa2, NULL)) == NULL) 2976 return (1); 2977 2978 switch (sa1->sa_family) { 2979 case AF_INET6: 2980 if (((struct sockaddr_in6 *)sa1)->sin6_scope_id != 2981 ((struct sockaddr_in6 *)sa2)->sin6_scope_id) 2982 return (1); 2983 break; 2984 } 2985 2986 /* Simple binary comparison if no mask specified. */ 2987 if (samask == NULL) 2988 return (memcmp(p1, p2, len)); 2989 2990 /* Set up the mask, and do a mask-based comparison. */ 2991 if (sa1->sa_family != samask->sa_family || 2992 (mask = sa_rawaddr(samask, NULL)) == NULL) 2993 return (1); 2994 2995 for (i = 0; i < len; i++) 2996 if ((p1[i] & mask[i]) != (p2[i] & mask[i])) 2997 return (1); 2998 return (0); 2999} 3000 3001/* 3002 * Return a pointer to the part of the sockaddr that contains the 3003 * raw address, and set *nbytes to its length in bytes. Returns 3004 * NULL if the address family is unknown. 3005 */ 3006void * 3007sa_rawaddr(struct sockaddr *sa, int *nbytes) { 3008 void *p; 3009 int len; 3010 3011 switch (sa->sa_family) { 3012 case AF_INET: 3013 len = sizeof(((struct sockaddr_in *)sa)->sin_addr); 3014 p = &((struct sockaddr_in *)sa)->sin_addr; 3015 break; 3016 case AF_INET6: 3017 len = sizeof(((struct sockaddr_in6 *)sa)->sin6_addr); 3018 p = &((struct sockaddr_in6 *)sa)->sin6_addr; 3019 break; 3020 default: 3021 p = NULL; 3022 len = 0; 3023 } 3024 3025 if (nbytes != NULL) 3026 *nbytes = len; 3027 return (p); 3028} 3029 3030void 3031huphandler(int sig) 3032{ 3033 got_sighup = 1; 3034} 3035 3036void terminate(sig) 3037int sig; 3038{ 3039 pidfile_remove(pfh); 3040 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); 3041 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); 3042 exit (0); 3043} 3044 3045