mountd.c revision 1.64
1 /* $NetBSD: mountd.c,v 1.64 2000/06/09 00:03:32 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Herb Hasler and Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 40 /* 41 * XXX The ISO support can't possibly work.. 42 */ 43 44 #include <sys/cdefs.h> 45 #ifndef lint 46 __COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\ 47 The Regents of the University of California. All rights reserved.\n"); 48 #endif /* not lint */ 49 50 #ifndef lint 51 #if 0 52 static char sccsid[] = "@(#)mountd.c 8.15 (Berkeley) 5/1/95"; 53 #else 54 __RCSID("$NetBSD: mountd.c,v 1.64 2000/06/09 00:03:32 fvdl Exp $"); 55 #endif 56 #endif /* not lint */ 57 58 #include <sys/param.h> 59 #include <sys/file.h> 60 #include <sys/ioctl.h> 61 #include <sys/mount.h> 62 #include <sys/socket.h> 63 #include <sys/stat.h> 64 #include <syslog.h> 65 #include <sys/ucred.h> 66 67 #include <rpc/rpc.h> 68 #include <rpc/pmap_clnt.h> 69 #include <rpc/pmap_prot.h> 70 #include <rpcsvc/mount.h> 71 #ifdef ISO 72 #include <netiso/iso.h> 73 #endif 74 #include <nfs/rpcv2.h> 75 #include <nfs/nfsproto.h> 76 #include <nfs/nfs.h> 77 #include <nfs/nfsmount.h> 78 79 #include <ufs/ufs/ufsmount.h> 80 #include <isofs/cd9660/cd9660_mount.h> 81 #include <msdosfs/msdosfsmount.h> 82 #include <adosfs/adosfs.h> 83 84 #include <arpa/inet.h> 85 86 #include <ctype.h> 87 #include <errno.h> 88 #include <grp.h> 89 #include <netdb.h> 90 #include <pwd.h> 91 #include <netgroup.h> 92 #include <signal.h> 93 #include <stdio.h> 94 #include <stdlib.h> 95 #include <string.h> 96 #include <unistd.h> 97 #include <netgroup.h> 98 #include <util.h> 99 #include "pathnames.h" 100 #ifdef KERBEROS 101 #include <kerberosIV/krb.h> 102 #include "kuid.h" 103 #endif 104 105 #include <stdarg.h> 106 107 /* 108 * Structures for keeping the mount list and export list 109 */ 110 struct mountlist { 111 struct mountlist *ml_next; 112 char ml_host[RPCMNT_NAMELEN + 1]; 113 char ml_dirp[RPCMNT_PATHLEN + 1]; 114 int ml_flag;/* XXX more flags (same as dp_flag) */ 115 }; 116 117 struct dirlist { 118 struct dirlist *dp_left; 119 struct dirlist *dp_right; 120 int dp_flag; 121 struct hostlist *dp_hosts; /* List of hosts this dir exported to */ 122 char dp_dirp[1]; /* Actually malloc'd to size of dir */ 123 }; 124 /* dp_flag bits */ 125 #define DP_DEFSET 0x1 126 #define DP_HOSTSET 0x2 127 #define DP_KERB 0x4 128 #define DP_NORESMNT 0x8 129 130 struct exportlist { 131 struct exportlist *ex_next; 132 struct dirlist *ex_dirl; 133 struct dirlist *ex_defdir; 134 int ex_flag; 135 fsid_t ex_fs; 136 char *ex_fsdir; 137 char *ex_indexfile; 138 }; 139 /* ex_flag bits */ 140 #define EX_LINKED 0x1 141 142 struct netmsk { 143 struct sockaddr_storage nt_net; 144 int nt_len; 145 char *nt_name; 146 }; 147 148 union grouptypes { 149 struct addrinfo *gt_addrinfo; 150 struct netmsk gt_net; 151 #ifdef ISO 152 struct sockaddr_iso *gt_isoaddr; 153 #endif 154 }; 155 156 struct grouplist { 157 int gr_type; 158 union grouptypes gr_ptr; 159 struct grouplist *gr_next; 160 }; 161 /* Group types */ 162 #define GT_NULL 0x0 163 #define GT_HOST 0x1 164 #define GT_NET 0x2 165 #define GT_ISO 0x4 166 167 struct hostlist { 168 int ht_flag;/* Uses DP_xx bits */ 169 struct grouplist *ht_grp; 170 struct hostlist *ht_next; 171 }; 172 173 struct fhreturn { 174 int fhr_flag; 175 int fhr_vers; 176 nfsfh_t fhr_fh; 177 }; 178 179 /* Global defs */ 180 static char *add_expdir __P((struct dirlist **, char *, int)); 181 static void add_dlist __P((struct dirlist **, struct dirlist *, 182 struct grouplist *, int)); 183 static void add_mlist __P((char *, char *, int)); 184 static int check_dirpath __P((const char *, size_t, char *)); 185 static int check_options __P((const char *, size_t, struct dirlist *)); 186 static int chk_host __P((struct dirlist *, struct sockaddr *, int *, int *)); 187 static int del_mlist __P((char *, char *, struct sockaddr *)); 188 static struct dirlist *dirp_search __P((struct dirlist *, char *)); 189 static int do_mount __P((const char *, size_t, struct exportlist *, 190 struct grouplist *, int, struct ucred *, char *, int, struct statfs *)); 191 static int do_opt __P((const char *, size_t, char **, char **, 192 struct exportlist *, struct grouplist *, int *, int *, struct ucred *)); 193 static struct exportlist *ex_search __P((fsid_t *)); 194 static int parse_directory __P((const char *, size_t, struct grouplist *, 195 int, char *, struct exportlist **, struct statfs *)); 196 static int parse_host_netgroup __P((const char *, size_t, struct exportlist *, 197 struct grouplist *, char *, int *, struct grouplist **)); 198 static struct exportlist *get_exp __P((void)); 199 static void free_dir __P((struct dirlist *)); 200 static void free_exp __P((struct exportlist *)); 201 static void free_grp __P((struct grouplist *)); 202 static void free_host __P((struct hostlist *)); 203 static void get_exportlist __P((int)); 204 static int get_host __P((const char *, size_t, const char *, 205 struct grouplist *)); 206 static struct hostlist *get_ht __P((void)); 207 static void get_mountlist __P((void)); 208 static int get_net __P((char *, struct netmsk *, int)); 209 static void free_exp_grp __P((struct exportlist *, struct grouplist *)); 210 static struct grouplist *get_grp __P((void)); 211 static void hang_dirp __P((struct dirlist *, struct grouplist *, 212 struct exportlist *, int)); 213 static void mntsrv __P((struct svc_req *, SVCXPRT *)); 214 static void nextfield __P((char **, char **)); 215 static void parsecred __P((char *, struct ucred *)); 216 static int put_exlist __P((struct dirlist *, XDR *, struct dirlist *, int *)); 217 static int scan_tree __P((struct dirlist *, struct sockaddr *)); 218 static void send_umntall __P((int)); 219 static int umntall_each __P((caddr_t, struct sockaddr_in *)); 220 static int xdr_dir __P((XDR *, char *)); 221 static int xdr_explist __P((XDR *, caddr_t)); 222 static int xdr_fhs __P((XDR *, caddr_t)); 223 static int xdr_mlist __P((XDR *, caddr_t)); 224 static void *emalloc __P((size_t)); 225 static char *estrdup __P((const char *)); 226 static int bitcmp __P((void *, void *, int)); 227 static int netpartcmp __P((struct sockaddr *, struct sockaddr *, int)); 228 static int sacmp __P((struct sockaddr *, struct sockaddr *)); 229 static int allones __P((struct sockaddr_storage *, int)); 230 static int countones __P((struct sockaddr *)); 231 #ifdef ISO 232 static int get_isoaddr __P((const char *, size_t, char *, struct grouplist *)); 233 #endif 234 static struct exportlist *exphead; 235 static struct mountlist *mlhead; 236 static struct grouplist *grphead; 237 static char *exname; 238 static struct ucred def_anon = { 239 1, 240 (uid_t) - 2, 241 (gid_t) - 2, 242 0, 243 {} 244 }; 245 246 static int opt_flags; 247 248 /* Bits for above */ 249 #define OP_MAPROOT 0x001 250 #define OP_MAPALL 0x002 251 #define OP_KERB 0x004 252 #define OP_MASK 0x008 253 #define OP_NET 0x010 254 #define OP_ISO 0x020 255 #define OP_ALLDIRS 0x040 256 #define OP_NORESPORT 0x080 257 #define OP_NORESMNT 0x100 258 #define OP_MASKLEN 0x200 259 260 static int debug = 0; 261 #if 0 262 static void SYSLOG __P((int, const char *,...)); 263 #endif 264 int main __P((int, char *[])); 265 266 /* 267 * Mountd server for NFS mount protocol as described in: 268 * NFS: Network File System Protocol Specification, RFC1094, Appendix A 269 * The optional arguments are the exports file name 270 * default: _PATH_EXPORTS 271 * "-d" to enable debugging 272 * and "-n" to allow nonroot mount. 273 */ 274 int 275 main(argc, argv) 276 int argc; 277 char **argv; 278 { 279 SVCXPRT *udptransp, *tcptransp, *udp6transp, *tcp6transp; 280 struct netconfig *udpconf, *tcpconf, *udp6conf, *tcp6conf; 281 int udpsock, tcpsock, udp6sock, tcp6sock; 282 int xcreated = 0; 283 int c, one = 1; 284 285 while ((c = getopt(argc, argv, "dnr")) != -1) 286 switch (c) { 287 case 'd': 288 debug = 1; 289 break; 290 /* Compatibility */ 291 case 'n': 292 case 'r': 293 break; 294 default: 295 fprintf(stderr, "Usage: mountd [-d] [export_file]\n"); 296 exit(1); 297 }; 298 argc -= optind; 299 argv += optind; 300 grphead = NULL; 301 exphead = NULL; 302 mlhead = NULL; 303 if (argc == 1) 304 exname = *argv; 305 else 306 exname = _PATH_EXPORTS; 307 openlog("mountd", LOG_PID, LOG_DAEMON); 308 if (debug) 309 (void)fprintf(stderr, "Getting export list.\n"); 310 get_exportlist(0); 311 if (debug) 312 (void)fprintf(stderr, "Getting mount list.\n"); 313 get_mountlist(); 314 if (debug) 315 (void)fprintf(stderr, "Here we go.\n"); 316 if (debug == 0) { 317 daemon(0, 0); 318 (void)signal(SIGINT, SIG_IGN); 319 (void)signal(SIGQUIT, SIG_IGN); 320 } 321 (void)signal(SIGHUP, get_exportlist); 322 (void)signal(SIGTERM, send_umntall); 323 pidfile(NULL); 324 325 rpcb_unset(RPCPROG_MNT, RPCMNT_VER1, NULL); 326 rpcb_unset(RPCPROG_MNT, RPCMNT_VER3, NULL); 327 328 udpsock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); 329 tcpsock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 330 udp6sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 331 tcp6sock = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP); 332 333 /* 334 * We're doing host-based access checks here, so don't allow 335 * v4-in-v6 to confuse things. The kernel will disable it 336 * by default on NFS sockets too. 337 */ 338 if (udp6sock != -1 && setsockopt(udp6sock, IPPROTO_IPV6, 339 IPV6_BINDV6ONLY, &one, sizeof one) < 0){ 340 syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket"); 341 exit(1); 342 } 343 if (tcp6sock != -1 && setsockopt(tcp6sock, IPPROTO_IPV6, 344 IPV6_BINDV6ONLY, &one, sizeof one) < 0){ 345 syslog(LOG_ERR, "can't disable v4-in-v6 on UDP socket"); 346 exit(1); 347 } 348 349 udpconf = getnetconfigent("udp"); 350 tcpconf = getnetconfigent("tcp"); 351 udp6conf = getnetconfigent("udp6"); 352 tcp6conf = getnetconfigent("tcp6"); 353 354 if (udpsock != -1 && udpconf != NULL) { 355 bindresvport(udpsock, NULL); 356 udptransp = svc_dg_create(udpsock, 0, 0); 357 if (udptransp != NULL) { 358 if (!svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER1, 359 mntsrv, udpconf) || 360 !svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER3, 361 mntsrv, udpconf)) 362 syslog(LOG_WARNING, "can't register UDP service"); 363 else 364 xcreated++; 365 } else 366 syslog(LOG_WARNING, "can't create UDP service"); 367 368 } 369 370 if (tcpsock != -1 && tcpconf != NULL) { 371 bindresvport(tcpsock, NULL); 372 listen(tcpsock, SOMAXCONN); 373 tcptransp = svc_vc_create(tcpsock, 0, 0); 374 if (tcptransp != NULL) { 375 if (!svc_reg(tcptransp, RPCPROG_MNT, RPCMNT_VER1, 376 mntsrv, tcpconf) || 377 !svc_reg(udptransp, RPCPROG_MNT, RPCMNT_VER3, 378 mntsrv, tcpconf)) 379 syslog(LOG_WARNING, "can't register TCP service"); 380 else 381 xcreated++; 382 } else 383 syslog(LOG_WARNING, "can't create TCP service"); 384 385 } 386 387 if (udp6sock != -1 && udp6conf != NULL) { 388 bindresvport(udp6sock, NULL); 389 udp6transp = svc_dg_create(udp6sock, 0, 0); 390 if (udp6transp != NULL) { 391 if (!svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER1, 392 mntsrv, udp6conf) || 393 !svc_reg(udp6transp, RPCPROG_MNT, RPCMNT_VER3, 394 mntsrv, udp6conf)) 395 syslog(LOG_WARNING, "can't register UDP6 service"); 396 else 397 xcreated++; 398 } else 399 syslog(LOG_WARNING, "can't create UDP6 service"); 400 401 } 402 403 if (tcp6sock != -1 && tcp6conf != NULL) { 404 bindresvport(tcp6sock, NULL); 405 listen(tcpsock, SOMAXCONN); 406 tcp6transp = svc_vc_create(tcp6sock, 0, 0); 407 if (tcp6transp != NULL) { 408 if (!svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER1, 409 mntsrv, tcp6conf) || 410 !svc_reg(tcp6transp, RPCPROG_MNT, RPCMNT_VER3, 411 mntsrv, tcp6conf)) 412 syslog(LOG_WARNING, "can't register TCP6 service"); 413 else 414 xcreated++; 415 } else 416 syslog(LOG_WARNING, "can't create TCP6 service"); 417 418 } 419 420 if (xcreated == 0) { 421 syslog(LOG_ERR, "could not create any services"); 422 exit(1); 423 } 424 425 #ifdef KERBEROS 426 kuidinit(); 427 #endif 428 svc_run(); 429 syslog(LOG_ERR, "Mountd died"); 430 exit(1); 431 } 432 433 /* 434 * The mount rpc service 435 */ 436 void 437 mntsrv(rqstp, transp) 438 struct svc_req *rqstp; 439 SVCXPRT *transp; 440 { 441 struct exportlist *ep; 442 struct dirlist *dp; 443 struct fhreturn fhr; 444 struct stat stb; 445 struct statfs fsb; 446 struct addrinfo *ai; 447 char host[NI_MAXHOST], numerichost[NI_MAXHOST]; 448 int lookup_failed = 1; 449 struct sockaddr *saddr; 450 u_short sport; 451 char rpcpath[RPCMNT_PATHLEN + 1], dirpath[MAXPATHLEN]; 452 long bad = EACCES; 453 int defset, hostset, ret; 454 sigset_t sighup_mask; 455 struct sockaddr_in6 *sin6; 456 struct sockaddr_in *sin; 457 458 (void)sigemptyset(&sighup_mask); 459 (void)sigaddset(&sighup_mask, SIGHUP); 460 saddr = svc_getrpccaller(transp)->buf; 461 switch (saddr->sa_family) { 462 case AF_INET6: 463 sin6 = (struct sockaddr_in6 *)saddr; 464 sport = ntohs(sin6->sin6_port); 465 break; 466 case AF_INET: 467 sin = (struct sockaddr_in *)saddr; 468 sport = ntohs(sin->sin_port); 469 break; 470 default: 471 syslog(LOG_ERR, "request from unknown address family"); 472 return; 473 } 474 lookup_failed = getnameinfo(saddr, saddr->sa_len, host, sizeof host, 475 NULL, 0, 0); 476 getnameinfo(saddr, saddr->sa_len, numerichost, 477 sizeof numerichost, NULL, 0, NI_NUMERICHOST); 478 ai = NULL; 479 #ifdef KERBEROS 480 kuidreset(); 481 #endif 482 ret = 0; 483 switch (rqstp->rq_proc) { 484 case NULLPROC: 485 if (!svc_sendreply(transp, xdr_void, NULL)) 486 syslog(LOG_ERR, "Can't send reply"); 487 return; 488 case MOUNTPROC_MNT: 489 if (!svc_getargs(transp, xdr_dir, rpcpath)) { 490 svcerr_decode(transp); 491 return; 492 } 493 if (debug) 494 fprintf(stderr, 495 "got mount request from %s\n", numerichost); 496 /* 497 * Get the real pathname and make sure it is a file or 498 * directory that exists. 499 */ 500 if (realpath(rpcpath, dirpath) == 0 || 501 stat(dirpath, &stb) < 0 || 502 (!S_ISDIR(stb.st_mode) && !S_ISREG(stb.st_mode)) || 503 statfs(dirpath, &fsb) < 0) { 504 (void)chdir("/"); /* Just in case realpath doesn't */ 505 if (debug) 506 (void)fprintf(stderr, "stat failed on %s\n", 507 dirpath); 508 if (!svc_sendreply(transp, xdr_long, (caddr_t) &bad)) 509 syslog(LOG_ERR, "Can't send reply"); 510 return; 511 } 512 /* Check in the exports list */ 513 (void)sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 514 ep = ex_search(&fsb.f_fsid); 515 hostset = defset = 0; 516 if (ep && (chk_host(ep->ex_defdir, saddr, &defset, 517 &hostset) || ((dp = dirp_search(ep->ex_dirl, dirpath)) && 518 chk_host(dp, saddr, &defset, &hostset)) || 519 (defset && scan_tree(ep->ex_defdir, saddr) == 0 && 520 scan_tree(ep->ex_dirl, saddr) == 0))) { 521 if (sport >= IPPORT_RESERVED && 522 !(hostset & DP_NORESMNT)) { 523 syslog(LOG_NOTICE, 524 "Refused mount RPC from host %s port %d", 525 numerichost, sport); 526 svcerr_weakauth(transp); 527 goto out; 528 } 529 if (hostset & DP_HOSTSET) 530 fhr.fhr_flag = hostset; 531 else 532 fhr.fhr_flag = defset; 533 fhr.fhr_vers = rqstp->rq_vers; 534 /* Get the file handle */ 535 (void)memset(&fhr.fhr_fh, 0, sizeof(nfsfh_t)); 536 if (getfh(dirpath, (fhandle_t *) &fhr.fhr_fh) < 0) { 537 bad = errno; 538 syslog(LOG_ERR, "Can't get fh for %s", dirpath); 539 if (!svc_sendreply(transp, xdr_long, 540 (char *)&bad)) 541 syslog(LOG_ERR, "Can't send reply"); 542 goto out; 543 } 544 if (!svc_sendreply(transp, xdr_fhs, (char *) &fhr)) 545 syslog(LOG_ERR, "Can't send reply"); 546 if (!lookup_failed) 547 add_mlist(host, dirpath, hostset); 548 else 549 add_mlist(numerichost, dirpath, hostset); 550 if (debug) 551 (void)fprintf(stderr, "Mount successful.\n"); 552 } else { 553 if (!svc_sendreply(transp, xdr_long, (caddr_t) &bad)) 554 syslog(LOG_ERR, "Can't send reply"); 555 } 556 out: 557 (void)sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 558 return; 559 case MOUNTPROC_DUMP: 560 if (!svc_sendreply(transp, xdr_mlist, NULL)) 561 syslog(LOG_ERR, "Can't send reply"); 562 return; 563 case MOUNTPROC_UMNT: 564 if (!svc_getargs(transp, xdr_dir, dirpath)) { 565 svcerr_decode(transp); 566 return; 567 } 568 if (!lookup_failed) 569 ret = del_mlist(host, dirpath, saddr); 570 ret |= del_mlist(numerichost, dirpath, saddr); 571 if (ret) { 572 svcerr_weakauth(transp); 573 return; 574 } 575 if (!svc_sendreply(transp, xdr_void, NULL)) 576 syslog(LOG_ERR, "Can't send reply"); 577 return; 578 case MOUNTPROC_UMNTALL: 579 if (!lookup_failed) 580 ret = del_mlist(host, NULL, saddr); 581 ret |= del_mlist(numerichost, NULL, saddr); 582 if (ret) { 583 svcerr_weakauth(transp); 584 return; 585 } 586 if (!svc_sendreply(transp, xdr_void, NULL)) 587 syslog(LOG_ERR, "Can't send reply"); 588 return; 589 case MOUNTPROC_EXPORT: 590 case MOUNTPROC_EXPORTALL: 591 if (!svc_sendreply(transp, xdr_explist, NULL)) 592 syslog(LOG_ERR, "Can't send reply"); 593 return; 594 595 #ifdef KERBEROS 596 case MOUNTPROC_KUIDMAP: 597 case MOUNTPROC_KUIDUMAP: 598 case MOUNTPROC_KUIDPURGE: 599 case MOUNTPROC_KUIDUPURGE: 600 kuidops(rqstp, transp); 601 return; 602 #endif 603 604 default: 605 svcerr_noproc(transp); 606 return; 607 } 608 } 609 610 /* 611 * Xdr conversion for a dirpath string 612 */ 613 static int 614 xdr_dir(xdrsp, dirp) 615 XDR *xdrsp; 616 char *dirp; 617 { 618 619 return (xdr_string(xdrsp, &dirp, RPCMNT_PATHLEN)); 620 } 621 622 /* 623 * Xdr routine to generate file handle reply 624 */ 625 static int 626 xdr_fhs(xdrsp, cp) 627 XDR *xdrsp; 628 caddr_t cp; 629 { 630 struct fhreturn *fhrp = (struct fhreturn *) cp; 631 long ok = 0, len, auth; 632 633 if (!xdr_long(xdrsp, &ok)) 634 return (0); 635 switch (fhrp->fhr_vers) { 636 case 1: 637 return (xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, NFSX_V2FH)); 638 case 3: 639 len = NFSX_V3FH; 640 if (!xdr_long(xdrsp, &len)) 641 return (0); 642 if (!xdr_opaque(xdrsp, (caddr_t)&fhrp->fhr_fh, len)) 643 return (0); 644 if (fhrp->fhr_flag & DP_KERB) 645 auth = RPCAUTH_KERB4; 646 else 647 auth = RPCAUTH_UNIX; 648 len = 1; 649 if (!xdr_long(xdrsp, &len)) 650 return (0); 651 return (xdr_long(xdrsp, &auth)); 652 }; 653 return (0); 654 } 655 656 int 657 xdr_mlist(xdrsp, cp) 658 XDR *xdrsp; 659 caddr_t cp; 660 { 661 struct mountlist *mlp; 662 int true = 1; 663 int false = 0; 664 char *strp; 665 666 mlp = mlhead; 667 while (mlp) { 668 if (!xdr_bool(xdrsp, &true)) 669 return (0); 670 strp = &mlp->ml_host[0]; 671 if (!xdr_string(xdrsp, &strp, RPCMNT_NAMELEN)) 672 return (0); 673 strp = &mlp->ml_dirp[0]; 674 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 675 return (0); 676 mlp = mlp->ml_next; 677 } 678 if (!xdr_bool(xdrsp, &false)) 679 return (0); 680 return (1); 681 } 682 683 /* 684 * Xdr conversion for export list 685 */ 686 int 687 xdr_explist(xdrsp, cp) 688 XDR *xdrsp; 689 caddr_t cp; 690 { 691 struct exportlist *ep; 692 int false = 0; 693 int putdef; 694 sigset_t sighup_mask; 695 696 (void)sigemptyset(&sighup_mask); 697 (void)sigaddset(&sighup_mask, SIGHUP); 698 (void)sigprocmask(SIG_BLOCK, &sighup_mask, NULL); 699 ep = exphead; 700 while (ep) { 701 putdef = 0; 702 if (put_exlist(ep->ex_dirl, xdrsp, ep->ex_defdir, &putdef)) 703 goto errout; 704 if (ep->ex_defdir && putdef == 0 && 705 put_exlist(ep->ex_defdir, xdrsp, NULL, &putdef)) 706 goto errout; 707 ep = ep->ex_next; 708 } 709 (void)sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 710 if (!xdr_bool(xdrsp, &false)) 711 return (0); 712 return (1); 713 errout: 714 (void)sigprocmask(SIG_UNBLOCK, &sighup_mask, NULL); 715 return (0); 716 } 717 718 /* 719 * Called from xdr_explist() to traverse the tree and export the 720 * directory paths. Assumes SIGHUP has already been masked. 721 */ 722 int 723 put_exlist(dp, xdrsp, adp, putdefp) 724 struct dirlist *dp; 725 XDR *xdrsp; 726 struct dirlist *adp; 727 int *putdefp; 728 { 729 struct grouplist *grp; 730 struct hostlist *hp; 731 int true = 1; 732 int false = 0; 733 int gotalldir = 0; 734 char *strp; 735 736 if (dp) { 737 if (put_exlist(dp->dp_left, xdrsp, adp, putdefp)) 738 return (1); 739 if (!xdr_bool(xdrsp, &true)) 740 return (1); 741 strp = dp->dp_dirp; 742 if (!xdr_string(xdrsp, &strp, RPCMNT_PATHLEN)) 743 return (1); 744 if (adp && !strcmp(dp->dp_dirp, adp->dp_dirp)) { 745 gotalldir = 1; 746 *putdefp = 1; 747 } 748 if ((dp->dp_flag & DP_DEFSET) == 0 && 749 (gotalldir == 0 || (adp->dp_flag & DP_DEFSET) == 0)) { 750 hp = dp->dp_hosts; 751 while (hp) { 752 grp = hp->ht_grp; 753 if (grp->gr_type == GT_HOST) { 754 if (!xdr_bool(xdrsp, &true)) 755 return (1); 756 strp = 757 grp->gr_ptr.gt_addrinfo->ai_canonname; 758 if (!xdr_string(xdrsp, &strp, 759 RPCMNT_NAMELEN)) 760 return (1); 761 } else if (grp->gr_type == GT_NET) { 762 if (!xdr_bool(xdrsp, &true)) 763 return (1); 764 strp = grp->gr_ptr.gt_net.nt_name; 765 if (!xdr_string(xdrsp, &strp, 766 RPCMNT_NAMELEN)) 767 return (1); 768 } 769 hp = hp->ht_next; 770 if (gotalldir && hp == NULL) { 771 hp = adp->dp_hosts; 772 gotalldir = 0; 773 } 774 } 775 } 776 if (!xdr_bool(xdrsp, &false)) 777 return (1); 778 if (put_exlist(dp->dp_right, xdrsp, adp, putdefp)) 779 return (1); 780 } 781 return (0); 782 } 783 784 static int 785 parse_host_netgroup(line, lineno, ep, tgrp, cp, has_host, grp) 786 const char *line; 787 size_t lineno; 788 struct exportlist *ep; 789 struct grouplist *tgrp; 790 char *cp; 791 int *has_host; 792 struct grouplist **grp; 793 { 794 const char *hst, *usr, *dom; 795 int netgrp; 796 797 if (ep == NULL) { 798 syslog(LOG_ERR, "\"%s\", line %ld: No current export", 799 line, (unsigned long)lineno); 800 return 0; 801 } 802 setnetgrent(cp); 803 netgrp = getnetgrent(&hst, &usr, &dom); 804 do { 805 if (*has_host) { 806 (*grp)->gr_next = get_grp(); 807 *grp = (*grp)->gr_next; 808 } 809 if (netgrp) { 810 if (hst == NULL) { 811 syslog(LOG_ERR, 812 "\"%s\", line %ld: No host in netgroup %s", 813 line, (unsigned long)lineno, cp); 814 goto bad; 815 } 816 if (get_host(line, lineno, hst, *grp)) 817 goto bad; 818 } else if (get_host(line, lineno, cp, *grp)) 819 goto bad; 820 *has_host = TRUE; 821 } while (netgrp && getnetgrent(&hst, &usr, &dom)); 822 823 endnetgrent(); 824 return 1; 825 bad: 826 endnetgrent(); 827 return 0; 828 829 } 830 831 static int 832 parse_directory(line, lineno, tgrp, got_nondir, cp, ep, fsp) 833 const char *line; 834 size_t lineno; 835 struct grouplist *tgrp; 836 int got_nondir; 837 char *cp; 838 struct exportlist **ep; 839 struct statfs *fsp; 840 { 841 if (!check_dirpath(line, lineno, cp)) 842 return 0; 843 844 if (statfs(cp, fsp) == -1) { 845 syslog(LOG_ERR, "\"%s\", line %ld: statfs for `%s' failed: %m", 846 line, (unsigned long)lineno, cp); 847 return 0; 848 } 849 850 if (got_nondir) { 851 syslog(LOG_ERR, 852 "\"%s\", line %ld: Directories must precede files", 853 line, (unsigned long)lineno); 854 return 0; 855 } 856 if (*ep) { 857 if ((*ep)->ex_fs.val[0] != fsp->f_fsid.val[0] || 858 (*ep)->ex_fs.val[1] != fsp->f_fsid.val[1]) { 859 syslog(LOG_ERR, 860 "\"%s\", line %ld: filesystem ids disagree", 861 line, (unsigned long)lineno); 862 return 0; 863 } 864 } else { 865 /* 866 * See if this directory is already 867 * in the list. 868 */ 869 *ep = ex_search(&fsp->f_fsid); 870 if (*ep == NULL) { 871 *ep = get_exp(); 872 (*ep)->ex_fs = fsp->f_fsid; 873 (*ep)->ex_fsdir = estrdup(fsp->f_mntonname); 874 if (debug) 875 (void)fprintf(stderr, 876 "Making new ep fs=0x%x,0x%x\n", 877 fsp->f_fsid.val[0], fsp->f_fsid.val[1]); 878 } else { 879 if (debug) 880 (void)fprintf(stderr, 881 "Found ep fs=0x%x,0x%x\n", 882 fsp->f_fsid.val[0], fsp->f_fsid.val[1]); 883 } 884 } 885 886 return 1; 887 } 888 889 890 /* 891 * Get the export list 892 */ 893 /* ARGSUSED */ 894 void 895 get_exportlist(n) 896 int n; 897 { 898 struct exportlist *ep, *ep2; 899 struct grouplist *grp, *tgrp; 900 struct exportlist **epp; 901 struct dirlist *dirhead; 902 struct statfs fsb, *fsp; 903 struct addrinfo *ai; 904 struct ucred anon; 905 char *cp, *endcp, *dirp, savedc; 906 int has_host, exflags, got_nondir, dirplen, num, i; 907 FILE *exp_file; 908 char *line; 909 size_t lineno = 0, len; 910 911 912 /* 913 * First, get rid of the old list 914 */ 915 ep = exphead; 916 while (ep) { 917 ep2 = ep; 918 ep = ep->ex_next; 919 free_exp(ep2); 920 } 921 exphead = NULL; 922 923 dirp = NULL; 924 dirplen = 0; 925 grp = grphead; 926 while (grp) { 927 tgrp = grp; 928 grp = grp->gr_next; 929 free_grp(tgrp); 930 } 931 grphead = NULL; 932 933 /* 934 * And delete exports that are in the kernel for all local 935 * file systems. 936 * XXX: Should know how to handle all local exportable file systems 937 * instead of just MOUNT_FFS. 938 */ 939 num = getmntinfo(&fsp, MNT_NOWAIT); 940 for (i = 0; i < num; i++) { 941 union { 942 struct ufs_args ua; 943 struct iso_args ia; 944 struct mfs_args ma; 945 struct msdosfs_args da; 946 struct adosfs_args aa; 947 } targs; 948 949 if (!strncmp(fsp->f_fstypename, MOUNT_MFS, MFSNAMELEN) || 950 !strncmp(fsp->f_fstypename, MOUNT_FFS, MFSNAMELEN) || 951 !strncmp(fsp->f_fstypename, MOUNT_EXT2FS, MFSNAMELEN) || 952 !strncmp(fsp->f_fstypename, MOUNT_MSDOS, MFSNAMELEN) || 953 !strncmp(fsp->f_fstypename, MOUNT_ADOSFS, MFSNAMELEN) || 954 !strncmp(fsp->f_fstypename, MOUNT_NULL, MFSNAMELEN) || 955 !strncmp(fsp->f_fstypename, MOUNT_UMAP, MFSNAMELEN) || 956 !strncmp(fsp->f_fstypename, MOUNT_UNION, MFSNAMELEN) || 957 !strncmp(fsp->f_fstypename, MOUNT_CD9660, MFSNAMELEN) || 958 !strncmp(fsp->f_fstypename, MOUNT_NTFS, MFSNAMELEN)) { 959 bzero((char *) &targs, sizeof(targs)); 960 targs.ua.fspec = NULL; 961 targs.ua.export.ex_flags = MNT_DELEXPORT; 962 if (mount(fsp->f_fstypename, fsp->f_mntonname, 963 fsp->f_flags | MNT_UPDATE, &targs) == -1) 964 syslog(LOG_ERR, "Can't delete exports for %s", 965 fsp->f_mntonname); 966 } 967 fsp++; 968 } 969 970 /* 971 * Read in the exports file and build the list, calling 972 * mount() as we go along to push the export rules into the kernel. 973 */ 974 if ((exp_file = fopen(exname, "r")) == NULL) { 975 syslog(LOG_ERR, "Can't open %s: %m", exname); 976 exit(2); 977 } 978 dirhead = NULL; 979 while ((line = fparseln(exp_file, &len, &lineno, NULL, 0)) != NULL) { 980 if (debug) 981 (void)fprintf(stderr, "Got line %s\n", line); 982 cp = line; 983 nextfield(&cp, &endcp); 984 if (cp == endcp) 985 continue; /* skip empty line */ 986 /* 987 * Set defaults. 988 */ 989 has_host = FALSE; 990 anon = def_anon; 991 exflags = MNT_EXPORTED; 992 got_nondir = 0; 993 opt_flags = 0; 994 ep = NULL; 995 996 /* 997 * Create new exports list entry 998 */ 999 len = endcp - cp; 1000 tgrp = grp = get_grp(); 1001 while (len > 0) { 1002 if (len > RPCMNT_NAMELEN) { 1003 *endcp = '\0'; 1004 syslog(LOG_ERR, 1005 "\"%s\", line %ld: name `%s' is too long", 1006 line, (unsigned long)lineno, cp); 1007 goto badline; 1008 } 1009 switch (*cp) { 1010 case '-': 1011 /* 1012 * Option 1013 */ 1014 if (ep == NULL) { 1015 syslog(LOG_ERR, 1016 "\"%s\", line %ld: No current export list", 1017 line, (unsigned long)lineno); 1018 goto badline; 1019 } 1020 if (debug) 1021 (void)fprintf(stderr, "doing opt %s\n", 1022 cp); 1023 got_nondir = 1; 1024 if (do_opt(line, lineno, &cp, &endcp, ep, grp, 1025 &has_host, &exflags, &anon)) 1026 goto badline; 1027 break; 1028 1029 case '/': 1030 /* 1031 * Directory 1032 */ 1033 savedc = *endcp; 1034 *endcp = '\0'; 1035 1036 if (!parse_directory(line, lineno, tgrp, 1037 got_nondir, cp, &ep, &fsb)) 1038 goto badline; 1039 /* 1040 * Add dirpath to export mount point. 1041 */ 1042 dirp = add_expdir(&dirhead, cp, len); 1043 dirplen = len; 1044 1045 *endcp = savedc; 1046 break; 1047 1048 default: 1049 /* 1050 * Host or netgroup. 1051 */ 1052 savedc = *endcp; 1053 *endcp = '\0'; 1054 1055 if (!parse_host_netgroup(line, lineno, ep, 1056 tgrp, cp, &has_host, &grp)) 1057 goto badline; 1058 1059 got_nondir = 1; 1060 1061 *endcp = savedc; 1062 break; 1063 } 1064 1065 cp = endcp; 1066 nextfield(&cp, &endcp); 1067 len = endcp - cp; 1068 } 1069 if (check_options(line, lineno, dirhead)) 1070 goto badline; 1071 1072 if (!has_host) { 1073 grp->gr_type = GT_HOST; 1074 if (debug) 1075 (void)fprintf(stderr, 1076 "Adding a default entry\n"); 1077 /* add a default group and make the grp list NULL */ 1078 ai = emalloc(sizeof(struct addrinfo)); 1079 ai->ai_flags = 0; 1080 ai->ai_family = AF_INET; /* XXXX */ 1081 ai->ai_socktype = SOCK_DGRAM; 1082 /* setting the length to 0 will match anything */ 1083 ai->ai_addrlen = 0; 1084 ai->ai_flags = AI_CANONNAME; 1085 ai->ai_canonname = estrdup("Default"); 1086 ai->ai_addr = NULL; 1087 ai->ai_next = NULL; 1088 grp->gr_ptr.gt_addrinfo = ai; 1089 1090 } else if ((opt_flags & OP_NET) && tgrp->gr_next) { 1091 /* 1092 * Don't allow a network export coincide with a list of 1093 * host(s) on the same line. 1094 */ 1095 syslog(LOG_ERR, 1096 "\"%s\", line %ld: Mixed exporting of networks and hosts is disallowed", 1097 line, (unsigned long)lineno); 1098 goto badline; 1099 } 1100 /* 1101 * Loop through hosts, pushing the exports into the kernel. 1102 * After loop, tgrp points to the start of the list and 1103 * grp points to the last entry in the list. 1104 */ 1105 grp = tgrp; 1106 do { 1107 if (do_mount(line, lineno, ep, grp, exflags, &anon, 1108 dirp, dirplen, &fsb)) 1109 goto badline; 1110 } while (grp->gr_next && (grp = grp->gr_next)); 1111 1112 /* 1113 * Success. Update the data structures. 1114 */ 1115 if (has_host) { 1116 hang_dirp(dirhead, tgrp, ep, opt_flags); 1117 grp->gr_next = grphead; 1118 grphead = tgrp; 1119 } else { 1120 hang_dirp(dirhead, NULL, ep, opt_flags); 1121 free_grp(grp); 1122 } 1123 dirhead = NULL; 1124 if ((ep->ex_flag & EX_LINKED) == 0) { 1125 ep2 = exphead; 1126 epp = &exphead; 1127 1128 /* 1129 * Insert in the list in alphabetical order. 1130 */ 1131 while (ep2 && strcmp(ep2->ex_fsdir, ep->ex_fsdir) < 0) { 1132 epp = &ep2->ex_next; 1133 ep2 = ep2->ex_next; 1134 } 1135 if (ep2) 1136 ep->ex_next = ep2; 1137 *epp = ep; 1138 ep->ex_flag |= EX_LINKED; 1139 } 1140 goto nextline; 1141 badline: 1142 free_exp_grp(ep, grp); 1143 nextline: 1144 if (dirhead) { 1145 free_dir(dirhead); 1146 dirhead = NULL; 1147 } 1148 free(line); 1149 } 1150 (void)fclose(exp_file); 1151 } 1152 1153 /* 1154 * Allocate an export list element 1155 */ 1156 static struct exportlist * 1157 get_exp() 1158 { 1159 struct exportlist *ep; 1160 1161 ep = emalloc(sizeof(struct exportlist)); 1162 (void)memset(ep, 0, sizeof(struct exportlist)); 1163 return (ep); 1164 } 1165 1166 /* 1167 * Allocate a group list element 1168 */ 1169 static struct grouplist * 1170 get_grp() 1171 { 1172 struct grouplist *gp; 1173 1174 gp = emalloc(sizeof(struct grouplist)); 1175 (void)memset(gp, 0, sizeof(struct grouplist)); 1176 return (gp); 1177 } 1178 1179 /* 1180 * Clean up upon an error in get_exportlist(). 1181 */ 1182 static void 1183 free_exp_grp(ep, grp) 1184 struct exportlist *ep; 1185 struct grouplist *grp; 1186 { 1187 struct grouplist *tgrp; 1188 1189 if (ep && (ep->ex_flag & EX_LINKED) == 0) 1190 free_exp(ep); 1191 while (grp) { 1192 tgrp = grp; 1193 grp = grp->gr_next; 1194 free_grp(tgrp); 1195 } 1196 } 1197 1198 /* 1199 * Search the export list for a matching fs. 1200 */ 1201 static struct exportlist * 1202 ex_search(fsid) 1203 fsid_t *fsid; 1204 { 1205 struct exportlist *ep; 1206 1207 ep = exphead; 1208 while (ep) { 1209 if (ep->ex_fs.val[0] == fsid->val[0] && 1210 ep->ex_fs.val[1] == fsid->val[1]) 1211 return (ep); 1212 ep = ep->ex_next; 1213 } 1214 return (ep); 1215 } 1216 1217 /* 1218 * Add a directory path to the list. 1219 */ 1220 static char * 1221 add_expdir(dpp, cp, len) 1222 struct dirlist **dpp; 1223 char *cp; 1224 int len; 1225 { 1226 struct dirlist *dp; 1227 1228 dp = emalloc(sizeof(struct dirlist) + len); 1229 dp->dp_left = *dpp; 1230 dp->dp_right = NULL; 1231 dp->dp_flag = 0; 1232 dp->dp_hosts = NULL; 1233 (void)strcpy(dp->dp_dirp, cp); 1234 *dpp = dp; 1235 return (dp->dp_dirp); 1236 } 1237 1238 /* 1239 * Hang the dir list element off the dirpath binary tree as required 1240 * and update the entry for host. 1241 */ 1242 void 1243 hang_dirp(dp, grp, ep, flags) 1244 struct dirlist *dp; 1245 struct grouplist *grp; 1246 struct exportlist *ep; 1247 int flags; 1248 { 1249 struct hostlist *hp; 1250 struct dirlist *dp2; 1251 1252 if (flags & OP_ALLDIRS) { 1253 if (ep->ex_defdir) 1254 free(dp); 1255 else 1256 ep->ex_defdir = dp; 1257 if (grp == NULL) { 1258 ep->ex_defdir->dp_flag |= DP_DEFSET; 1259 if (flags & OP_KERB) 1260 ep->ex_defdir->dp_flag |= DP_KERB; 1261 if (flags & OP_NORESMNT) 1262 ep->ex_defdir->dp_flag |= DP_NORESMNT; 1263 } else 1264 while (grp) { 1265 hp = get_ht(); 1266 if (flags & OP_KERB) 1267 hp->ht_flag |= DP_KERB; 1268 if (flags & OP_NORESMNT) 1269 hp->ht_flag |= DP_NORESMNT; 1270 hp->ht_grp = grp; 1271 hp->ht_next = ep->ex_defdir->dp_hosts; 1272 ep->ex_defdir->dp_hosts = hp; 1273 grp = grp->gr_next; 1274 } 1275 } else { 1276 1277 /* 1278 * Loop throught the directories adding them to the tree. 1279 */ 1280 while (dp) { 1281 dp2 = dp->dp_left; 1282 add_dlist(&ep->ex_dirl, dp, grp, flags); 1283 dp = dp2; 1284 } 1285 } 1286 } 1287 1288 /* 1289 * Traverse the binary tree either updating a node that is already there 1290 * for the new directory or adding the new node. 1291 */ 1292 static void 1293 add_dlist(dpp, newdp, grp, flags) 1294 struct dirlist **dpp; 1295 struct dirlist *newdp; 1296 struct grouplist *grp; 1297 int flags; 1298 { 1299 struct dirlist *dp; 1300 struct hostlist *hp; 1301 int cmp; 1302 1303 dp = *dpp; 1304 if (dp) { 1305 cmp = strcmp(dp->dp_dirp, newdp->dp_dirp); 1306 if (cmp > 0) { 1307 add_dlist(&dp->dp_left, newdp, grp, flags); 1308 return; 1309 } else if (cmp < 0) { 1310 add_dlist(&dp->dp_right, newdp, grp, flags); 1311 return; 1312 } else 1313 free(newdp); 1314 } else { 1315 dp = newdp; 1316 dp->dp_left = NULL; 1317 *dpp = dp; 1318 } 1319 if (grp) { 1320 1321 /* 1322 * Hang all of the host(s) off of the directory point. 1323 */ 1324 do { 1325 hp = get_ht(); 1326 if (flags & OP_KERB) 1327 hp->ht_flag |= DP_KERB; 1328 if (flags & OP_NORESMNT) 1329 hp->ht_flag |= DP_NORESMNT; 1330 hp->ht_grp = grp; 1331 hp->ht_next = dp->dp_hosts; 1332 dp->dp_hosts = hp; 1333 grp = grp->gr_next; 1334 } while (grp); 1335 } else { 1336 dp->dp_flag |= DP_DEFSET; 1337 if (flags & OP_KERB) 1338 dp->dp_flag |= DP_KERB; 1339 if (flags & OP_NORESMNT) 1340 dp->dp_flag |= DP_NORESMNT; 1341 } 1342 } 1343 1344 /* 1345 * Search for a dirpath on the export point. 1346 */ 1347 static struct dirlist * 1348 dirp_search(dp, dirp) 1349 struct dirlist *dp; 1350 char *dirp; 1351 { 1352 int cmp; 1353 1354 if (dp) { 1355 cmp = strcmp(dp->dp_dirp, dirp); 1356 if (cmp > 0) 1357 return (dirp_search(dp->dp_left, dirp)); 1358 else if (cmp < 0) 1359 return (dirp_search(dp->dp_right, dirp)); 1360 else 1361 return (dp); 1362 } 1363 return (dp); 1364 } 1365 1366 /* 1367 * Some helper functions for netmasks. They all assume masks in network 1368 * order (big endian). 1369 */ 1370 static int 1371 bitcmp(void *dst, void *src, int bitlen) 1372 { 1373 int i; 1374 u_int8_t *p1 = dst, *p2 = src; 1375 u_int8_t bitmask; 1376 int bytelen, bitsleft; 1377 1378 bytelen = bitlen / 8; 1379 bitsleft = bitlen % 8; 1380 1381 if (debug) { 1382 printf("comparing:\n"); 1383 for (i = 0; i < (bitsleft ? bytelen + 1 : bytelen); i++) 1384 printf("%02x", p1[i]); 1385 printf("\n"); 1386 for (i = 0; i < (bitsleft ? bytelen + 1 : bytelen); i++) 1387 printf("%02x", p2[i]); 1388 printf("\n"); 1389 } 1390 1391 for (i = 0; i < bytelen; i++) { 1392 if (*p1 != *p2) 1393 return 1; 1394 p1++; 1395 p2++; 1396 } 1397 1398 for (i = 0; i < bitsleft; i++) { 1399 bitmask = 1 << (7 - i); 1400 if ((*p1 & bitmask) != (*p2 & bitmask)) 1401 return 1; 1402 } 1403 1404 return 0; 1405 } 1406 1407 static int 1408 netpartcmp(struct sockaddr *s1, struct sockaddr *s2, int bitlen) 1409 { 1410 void *src, *dst; 1411 1412 if (s1->sa_family != s2->sa_family) 1413 return 1; 1414 1415 switch (s1->sa_family) { 1416 case AF_INET: 1417 src = &((struct sockaddr_in *)s1)->sin_addr; 1418 dst = &((struct sockaddr_in *)s2)->sin_addr; 1419 break; 1420 case AF_INET6: 1421 src = &((struct sockaddr_in6 *)s1)->sin6_addr; 1422 dst = &((struct sockaddr_in6 *)s2)->sin6_addr; 1423 break; 1424 default: 1425 return 1; 1426 } 1427 1428 return bitcmp(src, dst, bitlen); 1429 } 1430 1431 static int 1432 allones(struct sockaddr_storage *ssp, int bitlen) 1433 { 1434 u_int8_t *p; 1435 int bytelen, bitsleft, i; 1436 int zerolen; 1437 1438 switch (ssp->ss_family) { 1439 case AF_INET: 1440 p = (u_int8_t *)&((struct sockaddr_in *)ssp)->sin_addr; 1441 zerolen = sizeof (((struct sockaddr_in *)ssp)->sin_addr); 1442 break; 1443 case AF_INET6: 1444 p = (u_int8_t *)&((struct sockaddr_in6 *)ssp)->sin6_addr; 1445 zerolen = sizeof (((struct sockaddr_in6 *)ssp)->sin6_addr); 1446 break; 1447 default: 1448 return -1; 1449 } 1450 1451 memset(p, 0, zerolen); 1452 1453 bytelen = bitlen / 8; 1454 bitsleft = bitlen % 8; 1455 1456 for (i = 0; i < bytelen; i++) 1457 *p++ = 0xff; 1458 1459 for (i = 0; i < bitsleft; i++) 1460 *p |= 1 << (7 - i); 1461 1462 return 0; 1463 } 1464 1465 static int 1466 countones(struct sockaddr *sa) 1467 { 1468 void *mask; 1469 int i, bits = 0, bytelen; 1470 u_int8_t *p; 1471 1472 switch (sa->sa_family) { 1473 case AF_INET: 1474 mask = (u_int8_t *)&((struct sockaddr_in *)sa)->sin_addr; 1475 bytelen = 4; 1476 break; 1477 case AF_INET6: 1478 mask = (u_int8_t *)&((struct sockaddr_in6 *)sa)->sin6_addr; 1479 bytelen = 16; 1480 break; 1481 default: 1482 return 0; 1483 } 1484 1485 p = mask; 1486 1487 for (i = 0; i < bytelen; i++, p++) { 1488 if (*p != 0xff) { 1489 for (bits = 0; bits < 8; bits++) { 1490 if (!(*p & (1 << (7 - bits)))) 1491 break; 1492 } 1493 break; 1494 } 1495 } 1496 1497 return (i * 8 + bits); 1498 } 1499 1500 static int 1501 sacmp(struct sockaddr *sa1, struct sockaddr *sa2) 1502 { 1503 void *p1, *p2; 1504 int len; 1505 1506 if (sa1->sa_family != sa2->sa_family) 1507 return 1; 1508 1509 switch (sa1->sa_family) { 1510 case AF_INET: 1511 p1 = &((struct sockaddr_in *)sa1)->sin_addr; 1512 p2 = &((struct sockaddr_in *)sa2)->sin_addr; 1513 len = 4; 1514 break; 1515 case AF_INET6: 1516 p1 = &((struct sockaddr_in6 *)sa1)->sin6_addr; 1517 p2 = &((struct sockaddr_in6 *)sa2)->sin6_addr; 1518 len = 16; 1519 break; 1520 default: 1521 return 1; 1522 } 1523 1524 return memcmp(p1, p2, len); 1525 } 1526 1527 /* 1528 * Scan for a host match in a directory tree. 1529 */ 1530 static int 1531 chk_host(dp, saddr, defsetp, hostsetp) 1532 struct dirlist *dp; 1533 struct sockaddr *saddr; 1534 int *defsetp; 1535 int *hostsetp; 1536 { 1537 struct hostlist *hp; 1538 struct grouplist *grp; 1539 struct addrinfo *ai; 1540 1541 if (dp) { 1542 if (dp->dp_flag & DP_DEFSET) 1543 *defsetp = dp->dp_flag; 1544 hp = dp->dp_hosts; 1545 while (hp) { 1546 grp = hp->ht_grp; 1547 switch (grp->gr_type) { 1548 case GT_HOST: 1549 ai = grp->gr_ptr.gt_addrinfo; 1550 for (; ai; ai = ai->ai_next) { 1551 if (!sacmp(ai->ai_addr, saddr)) { 1552 *hostsetp = 1553 (hp->ht_flag | DP_HOSTSET); 1554 return (1); 1555 } 1556 } 1557 break; 1558 case GT_NET: 1559 if (!netpartcmp(saddr, 1560 (struct sockaddr *) 1561 &grp->gr_ptr.gt_net.nt_net, 1562 grp->gr_ptr.gt_net.nt_len)) { 1563 *hostsetp = (hp->ht_flag | DP_HOSTSET); 1564 return (1); 1565 } 1566 break; 1567 }; 1568 hp = hp->ht_next; 1569 } 1570 } 1571 return (0); 1572 } 1573 1574 /* 1575 * Scan tree for a host that matches the address. 1576 */ 1577 static int 1578 scan_tree(dp, saddr) 1579 struct dirlist *dp; 1580 struct sockaddr *saddr; 1581 { 1582 int defset, hostset; 1583 1584 if (dp) { 1585 if (scan_tree(dp->dp_left, saddr)) 1586 return (1); 1587 if (chk_host(dp, saddr, &defset, &hostset)) 1588 return (1); 1589 if (scan_tree(dp->dp_right, saddr)) 1590 return (1); 1591 } 1592 return (0); 1593 } 1594 1595 /* 1596 * Traverse the dirlist tree and free it up. 1597 */ 1598 static void 1599 free_dir(dp) 1600 struct dirlist *dp; 1601 { 1602 1603 if (dp) { 1604 free_dir(dp->dp_left); 1605 free_dir(dp->dp_right); 1606 free_host(dp->dp_hosts); 1607 free(dp); 1608 } 1609 } 1610 1611 /* 1612 * Parse the option string and update fields. 1613 * Option arguments may either be -<option>=<value> or 1614 * -<option> <value> 1615 */ 1616 static int 1617 do_opt(line, lineno, cpp, endcpp, ep, grp, has_hostp, exflagsp, cr) 1618 const char *line; 1619 size_t lineno; 1620 char **cpp, **endcpp; 1621 struct exportlist *ep; 1622 struct grouplist *grp; 1623 int *has_hostp; 1624 int *exflagsp; 1625 struct ucred *cr; 1626 { 1627 char *cpoptarg, *cpoptend; 1628 char *cp, *endcp, *cpopt, savedc, savedc2; 1629 int allflag, usedarg; 1630 1631 cpopt = *cpp; 1632 cpopt++; 1633 cp = *endcpp; 1634 savedc = *cp; 1635 *cp = '\0'; 1636 while (cpopt && *cpopt) { 1637 allflag = 1; 1638 usedarg = -2; 1639 savedc2 = '\0'; 1640 if ((cpoptend = strchr(cpopt, ',')) != NULL) { 1641 *cpoptend++ = '\0'; 1642 if ((cpoptarg = strchr(cpopt, '=')) != NULL) 1643 *cpoptarg++ = '\0'; 1644 } else { 1645 if ((cpoptarg = strchr(cpopt, '=')) != NULL) 1646 *cpoptarg++ = '\0'; 1647 else { 1648 *cp = savedc; 1649 nextfield(&cp, &endcp); 1650 **endcpp = '\0'; 1651 if (endcp > cp && *cp != '-') { 1652 cpoptarg = cp; 1653 savedc2 = *endcp; 1654 *endcp = '\0'; 1655 usedarg = 0; 1656 } 1657 } 1658 } 1659 if (!strcmp(cpopt, "ro") || !strcmp(cpopt, "o")) { 1660 *exflagsp |= MNT_EXRDONLY; 1661 } else if (cpoptarg && (!strcmp(cpopt, "maproot") || 1662 !(allflag = strcmp(cpopt, "mapall")) || 1663 !strcmp(cpopt, "root") || !strcmp(cpopt, "r"))) { 1664 usedarg++; 1665 parsecred(cpoptarg, cr); 1666 if (allflag == 0) { 1667 *exflagsp |= MNT_EXPORTANON; 1668 opt_flags |= OP_MAPALL; 1669 } else 1670 opt_flags |= OP_MAPROOT; 1671 } else if (!strcmp(cpopt, "kerb") || !strcmp(cpopt, "k")) { 1672 *exflagsp |= MNT_EXKERB; 1673 opt_flags |= OP_KERB; 1674 } else if (cpoptarg && (!strcmp(cpopt, "mask") || 1675 !strcmp(cpopt, "m"))) { 1676 if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 1)) { 1677 syslog(LOG_ERR, 1678 "\"%s\", line %ld: Bad mask: %s", 1679 line, (unsigned long)lineno, cpoptarg); 1680 return (1); 1681 } 1682 usedarg++; 1683 opt_flags |= OP_MASK; 1684 } else if (cpoptarg && (!strcmp(cpopt, "network") || 1685 !strcmp(cpopt, "n"))) { 1686 if (strchr(cpoptarg, '/') != NULL) { 1687 if (debug) 1688 fprintf(stderr, "setting OP_MASKLEN\n"); 1689 opt_flags |= OP_MASKLEN; 1690 } 1691 if (grp->gr_type != GT_NULL) { 1692 syslog(LOG_ERR, 1693 "\"%s\", line %ld: Network/host conflict", 1694 line, (unsigned long)lineno); 1695 return (1); 1696 } else if (get_net(cpoptarg, &grp->gr_ptr.gt_net, 0)) { 1697 syslog(LOG_ERR, 1698 "\"%s\", line %ld: Bad net: %s", 1699 line, (unsigned long)lineno, cpoptarg); 1700 return (1); 1701 } 1702 grp->gr_type = GT_NET; 1703 *has_hostp = 1; 1704 usedarg++; 1705 opt_flags |= OP_NET; 1706 } else if (!strcmp(cpopt, "alldirs")) { 1707 opt_flags |= OP_ALLDIRS; 1708 } else if (!strcmp(cpopt, "noresvmnt")) { 1709 opt_flags |= OP_NORESMNT; 1710 } else if (!strcmp(cpopt, "noresvport")) { 1711 opt_flags |= OP_NORESPORT; 1712 *exflagsp |= MNT_EXNORESPORT; 1713 } else if (!strcmp(cpopt, "public")) { 1714 *exflagsp |= (MNT_EXNORESPORT | MNT_EXPUBLIC); 1715 opt_flags |= OP_NORESPORT; 1716 } else if (!strcmp(cpopt, "webnfs")) { 1717 *exflagsp |= (MNT_EXNORESPORT | MNT_EXPUBLIC | 1718 MNT_EXRDONLY | MNT_EXPORTANON); 1719 opt_flags |= (OP_MAPALL | OP_NORESPORT); 1720 } else if (cpoptarg && !strcmp(cpopt, "index")) { 1721 ep->ex_indexfile = strdup(cpoptarg); 1722 #ifdef ISO 1723 } else if (cpoptarg && !strcmp(cpopt, "iso")) { 1724 if (get_isoaddr(line, lineno, cpoptarg, grp)) 1725 return (1); 1726 *has_hostp = 1; 1727 usedarg++; 1728 opt_flags |= OP_ISO; 1729 #endif /* ISO */ 1730 } else { 1731 syslog(LOG_ERR, 1732 "\"%s\", line %ld: Bad opt %s", 1733 line, (unsigned long)lineno, cpopt); 1734 return (1); 1735 } 1736 if (usedarg >= 0) { 1737 *endcp = savedc2; 1738 **endcpp = savedc; 1739 if (usedarg > 0) { 1740 *cpp = cp; 1741 *endcpp = endcp; 1742 } 1743 return (0); 1744 } 1745 cpopt = cpoptend; 1746 } 1747 **endcpp = savedc; 1748 return (0); 1749 } 1750 1751 /* 1752 * Translate a character string to the corresponding list of network 1753 * addresses for a hostname. 1754 */ 1755 static int 1756 get_host(line, lineno, cp, grp) 1757 const char *line; 1758 size_t lineno; 1759 const char *cp; 1760 struct grouplist *grp; 1761 { 1762 struct addrinfo *ai, hints; 1763 int ecode; 1764 char host[NI_MAXHOST]; 1765 1766 if (grp->gr_type != GT_NULL) { 1767 syslog(LOG_ERR, 1768 "\"%s\", line %ld: Bad netgroup type for ip host %s", 1769 line, (unsigned long)lineno, cp); 1770 return (1); 1771 } 1772 memset(&hints, 0, sizeof hints); 1773 hints.ai_flags = AI_CANONNAME; 1774 hints.ai_protocol = IPPROTO_UDP; 1775 ecode = getaddrinfo(cp, NULL, &hints, &ai); 1776 if (ecode != 0) { 1777 syslog(LOG_ERR, "\"%s\", line %ld: can't get address info for " 1778 "host %s", 1779 line, (long)lineno, cp); 1780 return 1; 1781 } 1782 grp->gr_type = GT_HOST; 1783 grp->gr_ptr.gt_addrinfo = ai; 1784 while (ai != NULL) { 1785 if (ai->ai_canonname == NULL) { 1786 getnameinfo(ai->ai_addr, ai->ai_addrlen, host, 1787 sizeof host, NULL, 0, NI_NUMERICHOST); 1788 ai->ai_canonname = estrdup(host); 1789 ai->ai_flags |= AI_CANONNAME; 1790 } else 1791 ai->ai_flags &= ~AI_CANONNAME; 1792 if (debug) 1793 (void)fprintf(stderr, "got host %s\n", ai->ai_canonname); 1794 ai = ai->ai_next; 1795 } 1796 return (0); 1797 } 1798 1799 /* 1800 * Free up an exports list component 1801 */ 1802 static void 1803 free_exp(ep) 1804 struct exportlist *ep; 1805 { 1806 1807 if (ep->ex_defdir) { 1808 free_host(ep->ex_defdir->dp_hosts); 1809 free(ep->ex_defdir); 1810 } 1811 if (ep->ex_fsdir) 1812 free(ep->ex_fsdir); 1813 if (ep->ex_indexfile) 1814 free(ep->ex_indexfile); 1815 free_dir(ep->ex_dirl); 1816 free(ep); 1817 } 1818 1819 /* 1820 * Free hosts. 1821 */ 1822 static void 1823 free_host(hp) 1824 struct hostlist *hp; 1825 { 1826 struct hostlist *hp2; 1827 1828 while (hp) { 1829 hp2 = hp; 1830 hp = hp->ht_next; 1831 free(hp2); 1832 } 1833 } 1834 1835 static struct hostlist * 1836 get_ht() 1837 { 1838 struct hostlist *hp; 1839 1840 hp = emalloc(sizeof(struct hostlist)); 1841 hp->ht_next = NULL; 1842 hp->ht_flag = 0; 1843 return (hp); 1844 } 1845 1846 #ifdef ISO 1847 /* 1848 * Translate an iso address. 1849 */ 1850 static int 1851 get_isoaddr(line, lineno, cp, grp) 1852 const char *line; 1853 size_t lineno; 1854 char *cp; 1855 struct grouplist *grp; 1856 { 1857 struct iso_addr *isop; 1858 struct sockaddr_iso *isoaddr; 1859 1860 if (grp->gr_type != GT_NULL) { 1861 syslog(LOG_ERR, 1862 "\"%s\", line %ld: Bad netgroup type for iso addr %s", 1863 line, (unsigned long)lineno, cp); 1864 return (1); 1865 } 1866 if ((isop = iso_addr(cp)) == NULL) { 1867 syslog(LOG_ERR, 1868 "\"%s\", line %ld: Bad iso addr %s", 1869 line, (unsigned long)lineno, cp); 1870 return (1); 1871 } 1872 isoaddr = emalloc(sizeof(struct sockaddr_iso)); 1873 (void)memset(isoaddr, 0, sizeof(struct sockaddr_iso)); 1874 (void)memcpy(&isoaddr->siso_addr, isop, sizeof(struct iso_addr)); 1875 isoaddr->siso_len = sizeof(struct sockaddr_iso); 1876 isoaddr->siso_family = AF_ISO; 1877 grp->gr_type = GT_ISO; 1878 grp->gr_ptr.gt_isoaddr = isoaddr; 1879 return (0); 1880 } 1881 #endif /* ISO */ 1882 1883 /* 1884 * error checked malloc and strdup 1885 */ 1886 static void * 1887 emalloc(n) 1888 size_t n; 1889 { 1890 void *ptr = malloc(n); 1891 1892 if (ptr == NULL) { 1893 syslog(LOG_ERR, "%m"); 1894 exit(2); 1895 } 1896 return ptr; 1897 } 1898 1899 static char * 1900 estrdup(s) 1901 const char *s; 1902 { 1903 char *n = strdup(s); 1904 1905 if (n == NULL) { 1906 syslog(LOG_ERR, "%m"); 1907 exit(2); 1908 } 1909 return n; 1910 } 1911 1912 /* 1913 * Do the mount syscall with the update flag to push the export info into 1914 * the kernel. 1915 */ 1916 static int 1917 do_mount(line, lineno, ep, grp, exflags, anoncrp, dirp, dirplen, fsb) 1918 const char *line; 1919 size_t lineno; 1920 struct exportlist *ep; 1921 struct grouplist *grp; 1922 int exflags; 1923 struct ucred *anoncrp; 1924 char *dirp; 1925 int dirplen; 1926 struct statfs *fsb; 1927 { 1928 struct sockaddr *addrp; 1929 struct sockaddr_storage ss; 1930 struct addrinfo *ai; 1931 int addrlen; 1932 char *cp = NULL; 1933 int done; 1934 char savedc = '\0'; 1935 union { 1936 struct ufs_args ua; 1937 struct iso_args ia; 1938 struct mfs_args ma; 1939 struct msdosfs_args da; 1940 struct adosfs_args aa; 1941 } args; 1942 1943 args.ua.fspec = 0; 1944 args.ua.export.ex_flags = exflags; 1945 args.ua.export.ex_anon = *anoncrp; 1946 args.ua.export.ex_indexfile = ep->ex_indexfile; 1947 if (grp->gr_type == GT_HOST) { 1948 ai = grp->gr_ptr.gt_addrinfo; 1949 addrp = ai->ai_addr; 1950 addrlen = ai->ai_addrlen; 1951 } else 1952 addrp = NULL; 1953 done = FALSE; 1954 while (!done) { 1955 switch (grp->gr_type) { 1956 case GT_HOST: 1957 args.ua.export.ex_addr = addrp; 1958 args.ua.export.ex_addrlen = addrlen; 1959 args.ua.export.ex_masklen = 0; 1960 break; 1961 case GT_NET: 1962 args.ua.export.ex_addr = (struct sockaddr *) 1963 &grp->gr_ptr.gt_net.nt_net; 1964 args.ua.export.ex_addrlen = 1965 args.ua.export.ex_addr->sa_len; 1966 memset(&ss, 0, sizeof ss); 1967 ss.ss_family = args.ua.export.ex_addr->sa_family; 1968 ss.ss_len = args.ua.export.ex_addr->sa_len; 1969 allones(&ss, grp->gr_ptr.gt_net.nt_len); 1970 args.ua.export.ex_mask = (struct sockaddr *)&ss; 1971 args.ua.export.ex_masklen = ss.ss_len; 1972 break; 1973 #ifdef ISO 1974 case GT_ISO: 1975 args.ua.export.ex_addr = 1976 (struct sockaddr *) grp->gr_ptr.gt_isoaddr; 1977 args.ua.export.ex_addrlen = 1978 sizeof(struct sockaddr_iso); 1979 args.ua.export.ex_masklen = 0; 1980 break; 1981 #endif /* ISO */ 1982 default: 1983 syslog(LOG_ERR, "\"%s\", line %ld: Bad netgroup type", 1984 line, (unsigned long)lineno); 1985 if (cp) 1986 *cp = savedc; 1987 return (1); 1988 }; 1989 1990 /* 1991 * XXX: 1992 * Maybe I should just use the fsb->f_mntonname path instead 1993 * of looping back up the dirp to the mount point?? 1994 * Also, needs to know how to export all types of local 1995 * exportable file systems and not just MOUNT_FFS. 1996 */ 1997 while (mount(fsb->f_fstypename, dirp, 1998 fsb->f_flags | MNT_UPDATE, &args) == -1) { 1999 if (cp) 2000 *cp-- = savedc; 2001 else 2002 cp = dirp + dirplen - 1; 2003 if (errno == EPERM) { 2004 syslog(LOG_ERR, 2005 "\"%s\", line %ld: Can't change attributes for %s to %s", 2006 line, (unsigned long)lineno, 2007 dirp, (grp->gr_type == GT_HOST) ? 2008 grp->gr_ptr.gt_addrinfo->ai_canonname : 2009 (grp->gr_type == GT_NET) ? 2010 grp->gr_ptr.gt_net.nt_name : 2011 "Unknown"); 2012 return (1); 2013 } 2014 if (opt_flags & OP_ALLDIRS) { 2015 syslog(LOG_ERR, 2016 "\"%s\", line %ld: Could not remount %s: %m", 2017 line, (unsigned long)lineno, 2018 dirp); 2019 return (1); 2020 } 2021 /* back up over the last component */ 2022 while (*cp == '/' && cp > dirp) 2023 cp--; 2024 while (*(cp - 1) != '/' && cp > dirp) 2025 cp--; 2026 if (cp == dirp) { 2027 if (debug) 2028 (void)fprintf(stderr, "mnt unsucc\n"); 2029 syslog(LOG_ERR, 2030 "\"%s\", line %ld: Can't export %s", 2031 line, (unsigned long)lineno, dirp); 2032 return (1); 2033 } 2034 savedc = *cp; 2035 *cp = '\0'; 2036 } 2037 if (addrp) { 2038 ai = ai->ai_next; 2039 if (ai == NULL) 2040 done = TRUE; 2041 else { 2042 addrp = ai->ai_addr; 2043 addrlen = ai->ai_addrlen; 2044 } 2045 } else 2046 done = TRUE; 2047 } 2048 if (cp) 2049 *cp = savedc; 2050 return (0); 2051 } 2052 2053 /* 2054 * Translate a net address. 2055 */ 2056 static int 2057 get_net(cp, net, maskflg) 2058 char *cp; 2059 struct netmsk *net; 2060 int maskflg; 2061 { 2062 struct netent *np; 2063 char *name, *p, *prefp; 2064 struct sockaddr_in sin, *sinp; 2065 struct sockaddr *sa; 2066 struct addrinfo hints, *ai = NULL; 2067 char netname[NI_MAXHOST]; 2068 long preflen; 2069 int ecode; 2070 2071 if ((opt_flags & OP_MASKLEN) && !maskflg) { 2072 p = strchr(cp, '/'); 2073 *p = '\0'; 2074 prefp = p + 1; 2075 } 2076 2077 if ((np = getnetbyname(cp)) != NULL) { 2078 sin.sin_family = AF_INET; 2079 sin.sin_len = sizeof sin; 2080 sin.sin_addr = inet_makeaddr(np->n_net, 0); 2081 sa = (struct sockaddr *)&sin; 2082 } else if (isdigit(*cp)) { 2083 memset(&hints, 0, sizeof hints); 2084 hints.ai_family = AF_UNSPEC; 2085 hints.ai_flags = AI_NUMERICHOST; 2086 if (getaddrinfo(cp, NULL, &hints, &ai) != 0) { 2087 /* 2088 * If getaddrinfo() failed, try the inet4 network 2089 * notation with less than 3 dots. 2090 */ 2091 sin.sin_family = AF_INET; 2092 sin.sin_len = sizeof sin; 2093 sin.sin_addr = inet_makeaddr(inet_network(cp),0); 2094 if (debug) 2095 fprintf(stderr, "get_net: v4 addr %x\n", 2096 sin.sin_addr.s_addr); 2097 sa = (struct sockaddr *)&sin; 2098 } else 2099 sa = ai->ai_addr; 2100 } else 2101 return 1; 2102 2103 ecode = getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2104 NULL, 0, NI_NUMERICHOST); 2105 if (ecode != 0) 2106 return 1; 2107 2108 if (maskflg) 2109 net->nt_len = countones(sa); 2110 else { 2111 if (opt_flags & OP_MASKLEN) { 2112 preflen = strtol(prefp, NULL, 10); 2113 if (preflen == LONG_MIN && errno == ERANGE) 2114 return 1; 2115 net->nt_len = (int)preflen; 2116 *p = '/'; 2117 } 2118 2119 if (np) 2120 name = np->n_name; 2121 else { 2122 getnameinfo(sa, sa->sa_len, netname, sizeof netname, 2123 NULL, 0, NI_NUMERICHOST); 2124 name = netname; 2125 } 2126 net->nt_name = estrdup(name); 2127 memcpy(&net->nt_net, sa, sa->sa_len); 2128 } 2129 2130 if (!maskflg && sa->sa_family == AF_INET && 2131 !(opt_flags & (OP_MASK|OP_MASKLEN))) { 2132 sinp = (struct sockaddr_in *)sa; 2133 if (IN_CLASSA(sinp->sin_addr.s_addr)) 2134 net->nt_len = 8; 2135 else if (IN_CLASSB(sinp->sin_addr.s_addr)) 2136 net->nt_len = 16; 2137 else if (IN_CLASSC(sinp->sin_addr.s_addr)) 2138 net->nt_len = 24; 2139 else if (IN_CLASSD(sinp->sin_addr.s_addr)) 2140 net->nt_len = 28; 2141 else 2142 net->nt_len = 32; /* XXX */ 2143 } 2144 2145 if (ai) 2146 freeaddrinfo(ai); 2147 return 0; 2148 } 2149 2150 /* 2151 * Parse out the next white space separated field 2152 */ 2153 static void 2154 nextfield(cp, endcp) 2155 char **cp; 2156 char **endcp; 2157 { 2158 char *p; 2159 2160 p = *cp; 2161 while (*p == ' ' || *p == '\t') 2162 p++; 2163 if (*p == '\n' || *p == '\0') 2164 *cp = *endcp = p; 2165 else { 2166 *cp = p++; 2167 while (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\0') 2168 p++; 2169 *endcp = p; 2170 } 2171 } 2172 2173 /* 2174 * Parse a description of a credential. 2175 */ 2176 static void 2177 parsecred(namelist, cr) 2178 char *namelist; 2179 struct ucred *cr; 2180 { 2181 char *name; 2182 int cnt; 2183 char *names; 2184 struct passwd *pw; 2185 struct group *gr; 2186 int ngroups, groups[NGROUPS + 1]; 2187 2188 /* 2189 * Set up the unprivileged user. 2190 */ 2191 cr->cr_ref = 1; 2192 cr->cr_uid = -2; 2193 cr->cr_gid = -2; 2194 cr->cr_ngroups = 0; 2195 /* 2196 * Get the user's password table entry. 2197 */ 2198 names = strsep(&namelist, " \t\n"); 2199 name = strsep(&names, ":"); 2200 if (isdigit(*name) || *name == '-') 2201 pw = getpwuid(atoi(name)); 2202 else 2203 pw = getpwnam(name); 2204 /* 2205 * Credentials specified as those of a user. 2206 */ 2207 if (names == NULL) { 2208 if (pw == NULL) { 2209 syslog(LOG_ERR, "Unknown user: %s", name); 2210 return; 2211 } 2212 cr->cr_uid = pw->pw_uid; 2213 ngroups = NGROUPS + 1; 2214 if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups)) 2215 syslog(LOG_ERR, "Too many groups"); 2216 /* 2217 * Convert from int's to gid_t's and compress out duplicate 2218 */ 2219 cr->cr_ngroups = ngroups - 1; 2220 cr->cr_gid = groups[0]; 2221 for (cnt = 1; cnt < ngroups; cnt++) 2222 cr->cr_groups[cnt - 1] = groups[cnt]; 2223 return; 2224 } 2225 /* 2226 * Explicit credential specified as a colon separated list: 2227 * uid:gid:gid:... 2228 */ 2229 if (pw != NULL) 2230 cr->cr_uid = pw->pw_uid; 2231 else if (isdigit(*name) || *name == '-') 2232 cr->cr_uid = atoi(name); 2233 else { 2234 syslog(LOG_ERR, "Unknown user: %s", name); 2235 return; 2236 } 2237 cr->cr_ngroups = 0; 2238 while (names != NULL && *names != '\0' && cr->cr_ngroups < NGROUPS) { 2239 name = strsep(&names, ":"); 2240 if (isdigit(*name) || *name == '-') { 2241 cr->cr_groups[cr->cr_ngroups++] = atoi(name); 2242 } else { 2243 if ((gr = getgrnam(name)) == NULL) { 2244 syslog(LOG_ERR, "Unknown group: %s", name); 2245 continue; 2246 } 2247 cr->cr_groups[cr->cr_ngroups++] = gr->gr_gid; 2248 } 2249 } 2250 if (names != NULL && *names != '\0' && cr->cr_ngroups == NGROUPS) 2251 syslog(LOG_ERR, "Too many groups"); 2252 } 2253 2254 #define STRSIZ (RPCMNT_NAMELEN+RPCMNT_PATHLEN+50) 2255 /* 2256 * Routines that maintain the remote mounttab 2257 */ 2258 static void 2259 get_mountlist() 2260 { 2261 struct mountlist *mlp, **mlpp; 2262 char *host, *dirp, *cp; 2263 char str[STRSIZ]; 2264 FILE *mlfile; 2265 2266 if ((mlfile = fopen(_PATH_RMOUNTLIST, "r")) == NULL) { 2267 syslog(LOG_ERR, "Can't open %s: %m", _PATH_RMOUNTLIST); 2268 return; 2269 } 2270 mlpp = &mlhead; 2271 while (fgets(str, STRSIZ, mlfile) != NULL) { 2272 cp = str; 2273 host = strsep(&cp, " \t\n"); 2274 dirp = strsep(&cp, " \t\n"); 2275 if (host == NULL || dirp == NULL) 2276 continue; 2277 mlp = emalloc(sizeof(*mlp)); 2278 (void)strncpy(mlp->ml_host, host, RPCMNT_NAMELEN); 2279 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2280 (void)strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2281 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2282 mlp->ml_next = NULL; 2283 *mlpp = mlp; 2284 mlpp = &mlp->ml_next; 2285 } 2286 (void)fclose(mlfile); 2287 } 2288 2289 static int 2290 del_mlist(hostp, dirp, saddr) 2291 char *hostp, *dirp; 2292 struct sockaddr *saddr; 2293 { 2294 struct mountlist *mlp, **mlpp; 2295 struct mountlist *mlp2; 2296 struct sockaddr_in *sin = (struct sockaddr_in *)saddr; 2297 FILE *mlfile; 2298 int fnd = 0, ret = 0; 2299 2300 mlpp = &mlhead; 2301 mlp = mlhead; 2302 while (mlp) { 2303 if (!strcmp(mlp->ml_host, hostp) && 2304 (!dirp || !strcmp(mlp->ml_dirp, dirp))) { 2305 if (!(mlp->ml_flag & DP_NORESMNT) && 2306 ntohs(sin->sin_port) >= IPPORT_RESERVED) { 2307 syslog(LOG_NOTICE, 2308 "Umount request for %s:%s from %s refused\n", 2309 mlp->ml_host, mlp->ml_dirp, 2310 inet_ntoa(sin->sin_addr)); 2311 ret = -1; 2312 goto cont; 2313 } 2314 fnd = 1; 2315 mlp2 = mlp; 2316 *mlpp = mlp = mlp->ml_next; 2317 free(mlp2); 2318 } else { 2319 cont: 2320 mlpp = &mlp->ml_next; 2321 mlp = mlp->ml_next; 2322 } 2323 } 2324 if (fnd) { 2325 if ((mlfile = fopen(_PATH_RMOUNTLIST, "w")) == NULL) { 2326 syslog(LOG_ERR, "Can't update %s: %m", 2327 _PATH_RMOUNTLIST); 2328 return ret; 2329 } 2330 mlp = mlhead; 2331 while (mlp) { 2332 (void)fprintf(mlfile, "%s %s\n", mlp->ml_host, 2333 mlp->ml_dirp); 2334 mlp = mlp->ml_next; 2335 } 2336 (void)fclose(mlfile); 2337 } 2338 return ret; 2339 } 2340 2341 static void 2342 add_mlist(hostp, dirp, flags) 2343 char *hostp, *dirp; 2344 int flags; 2345 { 2346 struct mountlist *mlp, **mlpp; 2347 FILE *mlfile; 2348 2349 mlpp = &mlhead; 2350 mlp = mlhead; 2351 while (mlp) { 2352 if (!strcmp(mlp->ml_host, hostp) && !strcmp(mlp->ml_dirp, dirp)) 2353 return; 2354 mlpp = &mlp->ml_next; 2355 mlp = mlp->ml_next; 2356 } 2357 mlp = emalloc(sizeof(*mlp)); 2358 strncpy(mlp->ml_host, hostp, RPCMNT_NAMELEN); 2359 mlp->ml_host[RPCMNT_NAMELEN] = '\0'; 2360 strncpy(mlp->ml_dirp, dirp, RPCMNT_PATHLEN); 2361 mlp->ml_dirp[RPCMNT_PATHLEN] = '\0'; 2362 mlp->ml_flag = flags; 2363 mlp->ml_next = NULL; 2364 *mlpp = mlp; 2365 if ((mlfile = fopen(_PATH_RMOUNTLIST, "a")) == NULL) { 2366 syslog(LOG_ERR, "Can't update %s: %m", _PATH_RMOUNTLIST); 2367 return; 2368 } 2369 (void)fprintf(mlfile, "%s %s\n", mlp->ml_host, mlp->ml_dirp); 2370 (void)fclose(mlfile); 2371 } 2372 2373 /* 2374 * This function is called via. SIGTERM when the system is going down. 2375 * It sends a broadcast RPCMNT_UMNTALL. 2376 */ 2377 /* ARGSUSED */ 2378 static void 2379 send_umntall(n) 2380 int n; 2381 { 2382 (void)clnt_broadcast(RPCPROG_MNT, RPCMNT_VER1, RPCMNT_UMNTALL, 2383 xdr_void, NULL, xdr_void, NULL, (resultproc_t)umntall_each); 2384 exit(0); 2385 } 2386 2387 static int 2388 umntall_each(resultsp, raddr) 2389 caddr_t resultsp; 2390 struct sockaddr_in *raddr; 2391 { 2392 return (1); 2393 } 2394 2395 /* 2396 * Free up a group list. 2397 */ 2398 static void 2399 free_grp(grp) 2400 struct grouplist *grp; 2401 { 2402 struct addrinfo *ai; 2403 2404 if (grp->gr_type == GT_HOST) { 2405 if (grp->gr_ptr.gt_addrinfo != NULL) { 2406 ai = grp->gr_ptr.gt_addrinfo; 2407 do { 2408 if (ai->ai_flags & AI_CANONNAME) 2409 free(ai->ai_canonname); 2410 ai = ai->ai_next; 2411 } while (ai != NULL); 2412 freeaddrinfo(grp->gr_ptr.gt_addrinfo); 2413 } 2414 } else if (grp->gr_type == GT_NET) { 2415 if (grp->gr_ptr.gt_net.nt_name) 2416 free(grp->gr_ptr.gt_net.nt_name); 2417 } 2418 #ifdef ISO 2419 else if (grp->gr_type == GT_ISO) 2420 free(grp->gr_ptr.gt_isoaddr); 2421 #endif 2422 free(grp); 2423 } 2424 2425 #if 0 2426 static void 2427 SYSLOG(int pri, const char *fmt,...) 2428 { 2429 va_list ap; 2430 2431 va_start(ap, fmt); 2432 2433 if (debug) 2434 vfprintf(stderr, fmt, ap); 2435 else 2436 vsyslog(pri, fmt, ap); 2437 2438 va_end(ap); 2439 } 2440 #endif 2441 2442 /* 2443 * Check options for consistency. 2444 */ 2445 static int 2446 check_options(line, lineno, dp) 2447 const char *line; 2448 size_t lineno; 2449 struct dirlist *dp; 2450 { 2451 2452 if (dp == NULL) { 2453 syslog(LOG_ERR, 2454 "\"%s\", line %ld: missing directory list", 2455 line, (unsigned long)lineno); 2456 return (1); 2457 } 2458 if ((opt_flags & (OP_MAPROOT|OP_MAPALL)) == (OP_MAPROOT|OP_MAPALL) || 2459 (opt_flags & (OP_MAPROOT|OP_KERB)) == (OP_MAPROOT|OP_KERB) || 2460 (opt_flags & (OP_MAPALL|OP_KERB)) == (OP_MAPALL|OP_KERB)) { 2461 syslog(LOG_ERR, 2462 "\"%s\", line %ld: -mapall, -maproot and -kerb mutually exclusive", 2463 line, (unsigned long)lineno); 2464 return (1); 2465 } 2466 if ((opt_flags & OP_MASK) && (opt_flags & OP_NET) == 0) { 2467 syslog(LOG_ERR, "\"%s\", line %ld: -mask requires -net", 2468 line, (unsigned long)lineno); 2469 return (1); 2470 } 2471 if ((opt_flags & OP_MASK) && (opt_flags & OP_MASKLEN) != 0) { 2472 syslog(LOG_ERR, "\"%s\", line %ld: /pref and -net mutually" 2473 "exclusive", 2474 line, (unsigned long)lineno); 2475 return (1); 2476 } 2477 if ((opt_flags & (OP_NET|OP_ISO)) == (OP_NET|OP_ISO)) { 2478 syslog(LOG_ERR, 2479 "\"%s\", line %ld: -net and -iso mutually exclusive", 2480 line, (unsigned long)lineno); 2481 return (1); 2482 } 2483 if ((opt_flags & OP_ALLDIRS) && dp->dp_left) { 2484 syslog(LOG_ERR, 2485 "\"%s\", line %ld: -alldir has multiple directories", 2486 line, (unsigned long)lineno); 2487 return (1); 2488 } 2489 return (0); 2490 } 2491 2492 /* 2493 * Check an absolute directory path for any symbolic links. Return true 2494 * if no symbolic links are found. 2495 */ 2496 static int 2497 check_dirpath(line, lineno, dirp) 2498 const char *line; 2499 size_t lineno; 2500 char *dirp; 2501 { 2502 char *cp; 2503 struct stat sb; 2504 char *file = ""; 2505 2506 for (cp = dirp + 1; *cp; cp++) { 2507 if (*cp == '/') { 2508 *cp = '\0'; 2509 if (lstat(dirp, &sb) == -1) 2510 goto bad; 2511 if (!S_ISDIR(sb.st_mode)) 2512 goto bad1; 2513 *cp = '/'; 2514 } 2515 } 2516 2517 cp = NULL; 2518 if (lstat(dirp, &sb) == -1) 2519 goto bad; 2520 2521 if (!S_ISDIR(sb.st_mode) && !S_ISREG(sb.st_mode)) { 2522 file = " file or a"; 2523 goto bad1; 2524 } 2525 2526 return 1; 2527 2528 bad: 2529 syslog(LOG_ERR, 2530 "\"%s\", line %ld: lstat for `%s' failed: %m", 2531 line, (unsigned long)lineno, dirp); 2532 if (cp) 2533 *cp = '/'; 2534 return 0; 2535 2536 bad1: 2537 syslog(LOG_ERR, 2538 "\"%s\", line %ld: `%s' is not a%s directory", 2539 line, (unsigned long)lineno, dirp, file); 2540 if (cp) 2541 *cp = '/'; 2542 return 0; 2543 } 2544
Indexes created Fri Sep 26 20:09:58 GMT 2025