1 /*- 2 * Copyright (c) 2009 Rick Macklem, University of Guelph 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/errno.h> 33 #include <sys/linker.h> 34 #include <sys/module.h> 35 #include <sys/mount.h> 36 #include <sys/socket.h> 37 #include <sys/socketvar.h> 38 #include <sys/time.h> 39 #include <sys/ucred.h> 40 #include <sys/vnode.h> 41 #include <sys/wait.h> 42 43 #include <netinet/in.h> 44 45 #include <arpa/inet.h> 46 47 #include <nfs/nfssvc.h> 48 49 #include <rpc/rpc.h> 50 51 #include <fs/nfs/rpcv2.h> 52 #include <fs/nfs/nfsproto.h> 53 #include <fs/nfs/nfskpiport.h> 54 #include <fs/nfs/nfs.h> 55 56 #include <ctype.h> 57 #include <err.h> 58 #include <grp.h> 59 #include <netdb.h> 60 #include <pwd.h> 61 #include <signal.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <syslog.h> 66 #include <unistd.h> 67 68 /* 69 * This program loads the password and group databases into the kernel 70 * for NFS V4. 71 */ 72 73 static void cleanup_term(int); 74 static void usage(void); 75 static void nfsuserdsrv(struct svc_req *, SVCXPRT *); 76 static bool_t xdr_getid(XDR *, caddr_t); 77 static bool_t xdr_getname(XDR *, caddr_t); 78 static bool_t xdr_retval(XDR *, caddr_t); 79 static int nfsbind_localhost(void); 80 81 #define MAXNAME 1024 82 #define MAXNFSUSERD 20 83 #define DEFNFSUSERD 4 84 #define MAXUSERMAX 100000 85 #define MINUSERMAX 10 86 #define DEFUSERMAX 200 87 #define DEFUSERTIMEOUT (1 * 60) 88 struct info { 89 long id; 90 long retval; 91 char name[MAXNAME + 1]; 92 }; 93 94 u_char *dnsname = "default.domain"; 95 u_char *defaultuser = "nobody"; 96 uid_t defaultuid = 65534; 97 u_char *defaultgroup = "nogroup"; 98 gid_t defaultgid = 65533; 99 int verbose = 0, im_a_slave = 0, nfsuserdcnt = -1, forcestart = 0; 100 int defusertimeout = DEFUSERTIMEOUT, manage_gids = 0; 101 pid_t slaves[MAXNFSUSERD]; 102 static struct sockaddr_storage fromip; 103 #ifdef INET6 104 static struct in6_addr in6loopback = IN6ADDR_LOOPBACK_INIT; 105 #endif 106 107 int 108 main(int argc, char *argv[]) 109 { 110 int i, j; 111 int error, fnd_dup, len, mustfreeai = 0, start_uidpos; 112 struct nfsd_idargs nid; 113 struct passwd *pwd; 114 struct group *grp; 115 int sock, one = 1; 116 SVCXPRT *udptransp; 117 struct nfsuserd_args nargs; 118 sigset_t signew; 119 char hostname[MAXHOSTNAMELEN + 1], *cp; 120 struct addrinfo *aip, hints; 121 static uid_t check_dups[MAXUSERMAX]; 122 gid_t grps[NGROUPS]; 123 int ngroup; 124 #ifdef INET 125 struct sockaddr_in *sin; 126 #endif 127 #ifdef INET6 128 struct sockaddr_in6 *sin6; 129 #endif 130 int s; 131 132 if (modfind("nfscommon") < 0) { 133 /* Not present in kernel, try loading it */ 134 if (kldload("nfscommon") < 0 || 135 modfind("nfscommon") < 0) 136 errx(1, "Experimental nfs subsystem is not available"); 137 } 138 139 /* 140 * First, figure out what our domain name and Kerberos Realm 141 * seem to be. Command line args may override these later. 142 */ 143 if (gethostname(hostname, MAXHOSTNAMELEN) == 0) { 144 if ((cp = strchr(hostname, '.')) != NULL && 145 *(cp + 1) != '\0') { 146 dnsname = cp + 1; 147 } else { 148 memset((void *)&hints, 0, sizeof (hints)); 149 hints.ai_flags = AI_CANONNAME; 150 error = getaddrinfo(hostname, NULL, &hints, &aip); 151 if (error == 0) { 152 if (aip->ai_canonname != NULL && 153 (cp = strchr(aip->ai_canonname, '.')) != NULL 154 && *(cp + 1) != '\0') { 155 dnsname = cp + 1; 156 mustfreeai = 1; 157 } else { 158 freeaddrinfo(aip); 159 } 160 } 161 } 162 } 163 164 /* 165 * See if this server handles IPv4 or IPv6 and set up the default 166 * localhost address. 167 */ 168 s = -1; 169 #ifdef INET6 170 s = socket(PF_INET6, SOCK_DGRAM, 0); 171 if (s >= 0) { 172 fromip.ss_family = AF_INET6; 173 fromip.ss_len = sizeof(struct sockaddr_in6); 174 sin6 = (struct sockaddr_in6 *)&fromip; 175 sin6->sin6_addr = in6loopback; 176 close(s); 177 } 178 #endif /* INET6 */ 179 #ifdef INET 180 if (s < 0) { 181 s = socket(PF_INET, SOCK_DGRAM, 0); 182 if (s >= 0) { 183 fromip.ss_family = AF_INET; 184 fromip.ss_len = sizeof(struct sockaddr_in); 185 sin = (struct sockaddr_in *)&fromip; 186 sin->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 187 close(s); 188 } 189 } 190 #endif /* INET */ 191 if (s < 0) 192 err(1, "Can't create a inet/inet6 socket"); 193 194 nid.nid_usermax = DEFUSERMAX; 195 nid.nid_usertimeout = defusertimeout; 196 197 argc--; 198 argv++; 199 while (argc >= 1) { 200 if (!strcmp(*argv, "-domain")) { 201 if (argc == 1) 202 usage(); 203 argc--; 204 argv++; 205 strncpy(hostname, *argv, MAXHOSTNAMELEN); 206 hostname[MAXHOSTNAMELEN] = '\0'; 207 dnsname = hostname; 208 } else if (!strcmp(*argv, "-verbose")) { 209 verbose = 1; 210 } else if (!strcmp(*argv, "-force")) { 211 forcestart = 1; 212 } else if (!strcmp(*argv, "-manage-gids")) { 213 manage_gids = 1; 214 } else if (!strcmp(*argv, "-usermax")) { 215 if (argc == 1) 216 usage(); 217 argc--; 218 argv++; 219 i = atoi(*argv); 220 if (i < MINUSERMAX || i > MAXUSERMAX) { 221 fprintf(stderr, 222 "usermax %d out of range %d<->%d\n", i, 223 MINUSERMAX, MAXUSERMAX); 224 usage(); 225 } 226 nid.nid_usermax = i; 227 } else if (!strcmp(*argv, "-usertimeout")) { 228 if (argc == 1) 229 usage(); 230 argc--; 231 argv++; 232 i = atoi(*argv); 233 if (i < 0 || i > 100000) { 234 fprintf(stderr, 235 "usertimeout %d out of range 0<->100000\n", 236 i); 237 usage(); 238 } 239 nid.nid_usertimeout = defusertimeout = i * 60; 240 } else if (nfsuserdcnt == -1) { 241 nfsuserdcnt = atoi(*argv); 242 if (nfsuserdcnt < 1) 243 usage(); 244 if (nfsuserdcnt > MAXNFSUSERD) { 245 warnx("nfsuserd count %d; reset to %d", 246 nfsuserdcnt, DEFNFSUSERD); 247 nfsuserdcnt = DEFNFSUSERD; 248 } 249 } else { 250 usage(); 251 } 252 argc--; 253 argv++; 254 } 255 if (nfsuserdcnt < 1) 256 nfsuserdcnt = DEFNFSUSERD; 257 258 /* 259 * Strip off leading and trailing '.'s in domain name and map 260 * alphabetics to lower case. 261 */ 262 while (*dnsname == '.') 263 dnsname++; 264 if (*dnsname == '\0') 265 errx(1, "Domain name all '.'"); 266 len = strlen(dnsname); 267 cp = dnsname + len - 1; 268 while (*cp == '.') { 269 *cp = '\0'; 270 len--; 271 cp--; 272 } 273 for (i = 0; i < len; i++) { 274 if (!isascii(dnsname[i])) 275 errx(1, "Domain name has non-ascii char"); 276 if (isupper(dnsname[i])) 277 dnsname[i] = tolower(dnsname[i]); 278 } 279 280 /* 281 * If the nfsuserd died off ungracefully, this is necessary to 282 * get them to start again. 283 */ 284 if (forcestart && nfssvc(NFSSVC_NFSUSERDDELPORT, NULL) < 0) 285 errx(1, "Can't do nfssvc() to delete the port"); 286 287 if (verbose) 288 fprintf(stderr, 289 "nfsuserd: domain=%s usermax=%d usertimeout=%d\n", 290 dnsname, nid.nid_usermax, nid.nid_usertimeout); 291 292 for (i = 0; i < nfsuserdcnt; i++) 293 slaves[i] = (pid_t)-1; 294 295 nargs.nuserd_family = fromip.ss_family; 296 /* 297 * Set up the service port to accept requests via UDP from 298 * localhost (INADDR_LOOPBACK or IN6ADDR_LOOPBACK_INIT). 299 */ 300 if ((sock = socket(nargs.nuserd_family, SOCK_DGRAM, IPPROTO_UDP)) < 0) 301 err(1, "cannot create udp socket"); 302 303 /* 304 * Not sure what this does, so I'll leave it here for now. 305 */ 306 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); 307 308 if ((udptransp = svcudp_create(sock)) == NULL) 309 err(1, "Can't set up socket"); 310 311 /* 312 * By not specifying a protocol, it is linked into the 313 * dispatch queue, but not registered with portmapper, 314 * which is just what I want. 315 */ 316 if (!svc_register(udptransp, RPCPROG_NFSUSERD, RPCNFSUSERD_VERS, 317 nfsuserdsrv, 0)) 318 err(1, "Can't register nfsuserd"); 319 320 /* 321 * Tell the kernel what my port# is. 322 */ 323 nargs.nuserd_port = htons(udptransp->xp_port); 324 #ifdef DEBUG 325 printf("portnum=0x%x\n", nargs.nuserd_port); 326 #else 327 if (nfssvc(NFSSVC_NFSUSERDPORT | NFSSVC_NEWSTRUCT, &nargs) < 0) { 328 if (errno == EPERM) { 329 fprintf(stderr, 330 "Can't start nfsuserd when already running"); 331 fprintf(stderr, 332 " If not running, use the -force option.\n"); 333 } else { 334 fprintf(stderr, "Can't do nfssvc() to add port\n"); 335 } 336 exit(1); 337 } 338 #endif 339 340 pwd = getpwnam(defaultuser); 341 if (pwd) 342 nid.nid_uid = pwd->pw_uid; 343 else 344 nid.nid_uid = defaultuid; 345 grp = getgrnam(defaultgroup); 346 if (grp) 347 nid.nid_gid = grp->gr_gid; 348 else 349 nid.nid_gid = defaultgid; 350 nid.nid_name = dnsname; 351 nid.nid_namelen = strlen(nid.nid_name); 352 nid.nid_ngroup = 0; 353 nid.nid_grps = NULL; 354 nid.nid_flag = NFSID_INITIALIZE; 355 #ifdef DEBUG 356 printf("Initialize uid=%d gid=%d dns=%s\n", nid.nid_uid, nid.nid_gid, 357 nid.nid_name); 358 #else 359 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 360 if (error) 361 errx(1, "Can't initialize nfs user/groups"); 362 #endif 363 364 i = 0; 365 /* 366 * Loop around adding all groups. 367 */ 368 setgrent(); 369 while (i < nid.nid_usermax && (grp = getgrent())) { 370 nid.nid_gid = grp->gr_gid; 371 nid.nid_name = grp->gr_name; 372 nid.nid_namelen = strlen(grp->gr_name); 373 nid.nid_ngroup = 0; 374 nid.nid_grps = NULL; 375 nid.nid_flag = NFSID_ADDGID; 376 #ifdef DEBUG 377 printf("add gid=%d name=%s\n", nid.nid_gid, nid.nid_name); 378 #else 379 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 380 if (error) 381 errx(1, "Can't add group %s", grp->gr_name); 382 #endif 383 i++; 384 } 385 endgrent(); 386 387 /* 388 * Loop around adding all users. 389 */ 390 start_uidpos = i; 391 setpwent(); 392 while (i < nid.nid_usermax && (pwd = getpwent())) { 393 fnd_dup = 0; 394 /* 395 * Yes, this is inefficient, but it is only done once when 396 * the daemon is started and will run in a fraction of a second 397 * for nid_usermax at 10000. If nid_usermax is cranked up to 398 * 100000, it will take several seconds, depending on the CPU. 399 */ 400 for (j = 0; j < (i - start_uidpos); j++) 401 if (check_dups[j] == pwd->pw_uid) { 402 /* Found another entry for uid, so skip it */ 403 fnd_dup = 1; 404 break; 405 } 406 if (fnd_dup != 0) 407 continue; 408 check_dups[i - start_uidpos] = pwd->pw_uid; 409 nid.nid_uid = pwd->pw_uid; 410 nid.nid_name = pwd->pw_name; 411 nid.nid_namelen = strlen(pwd->pw_name); 412 if (manage_gids != 0) { 413 /* Get the group list for this user. */ 414 ngroup = NGROUPS; 415 if (getgrouplist(pwd->pw_name, pwd->pw_gid, grps, 416 &ngroup) < 0) 417 syslog(LOG_ERR, "Group list too small"); 418 nid.nid_ngroup = ngroup; 419 nid.nid_grps = grps; 420 } else { 421 nid.nid_ngroup = 0; 422 nid.nid_grps = NULL; 423 } 424 nid.nid_flag = NFSID_ADDUID; 425 #ifdef DEBUG 426 printf("add uid=%d name=%s\n", nid.nid_uid, nid.nid_name); 427 #else 428 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 429 if (error) 430 errx(1, "Can't add user %s", pwd->pw_name); 431 #endif 432 i++; 433 } 434 endpwent(); 435 436 /* 437 * I should feel guilty for not calling this for all the above exit() 438 * upon error cases, but I don't. 439 */ 440 if (mustfreeai) 441 freeaddrinfo(aip); 442 443 #ifdef DEBUG 444 exit(0); 445 #endif 446 /* 447 * Temporarily block SIGUSR1 and SIGCHLD, so slaves[] can't 448 * end up bogus. 449 */ 450 sigemptyset(&signew); 451 sigaddset(&signew, SIGUSR1); 452 sigaddset(&signew, SIGCHLD); 453 sigprocmask(SIG_BLOCK, &signew, NULL); 454 455 daemon(0, 0); 456 (void)signal(SIGHUP, SIG_IGN); 457 (void)signal(SIGINT, SIG_IGN); 458 (void)signal(SIGQUIT, SIG_IGN); 459 (void)signal(SIGTERM, SIG_IGN); 460 (void)signal(SIGUSR1, cleanup_term); 461 (void)signal(SIGCHLD, cleanup_term); 462 463 openlog("nfsuserd:", LOG_PID, LOG_DAEMON); 464 465 /* 466 * Fork off the slave daemons that do the work. All the master 467 * does is kill them off and cleanup. 468 */ 469 for (i = 0; i < nfsuserdcnt; i++) { 470 slaves[i] = fork(); 471 if (slaves[i] == 0) { 472 im_a_slave = 1; 473 setproctitle("slave"); 474 sigemptyset(&signew); 475 sigaddset(&signew, SIGUSR1); 476 sigprocmask(SIG_UNBLOCK, &signew, NULL); 477 478 /* 479 * and away we go. 480 */ 481 svc_run(); 482 syslog(LOG_ERR, "nfsuserd died: %m"); 483 exit(1); 484 } else if (slaves[i] < 0) { 485 syslog(LOG_ERR, "fork: %m"); 486 } 487 } 488 489 /* 490 * Just wait for SIGUSR1 or a child to die and then... 491 * As the Governor of California would say, "Terminate them". 492 */ 493 setproctitle("master"); 494 sigemptyset(&signew); 495 while (1) 496 sigsuspend(&signew); 497 } 498 499 /* 500 * The nfsuserd rpc service 501 */ 502 static void 503 nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) 504 { 505 struct passwd *pwd; 506 struct group *grp; 507 int error; 508 #if defined(INET) || defined(INET6) 509 u_short sport; 510 int ret; 511 #endif 512 struct info info; 513 struct nfsd_idargs nid; 514 gid_t grps[NGROUPS]; 515 int ngroup; 516 #ifdef INET 517 struct sockaddr_in *fromsin, *sin; 518 #endif 519 #ifdef INET6 520 struct sockaddr_in6 *fromsin6, *sin6; 521 char buf[INET6_ADDRSTRLEN]; 522 #endif 523 524 /* 525 * Only handle requests from localhost on a reserved port number. 526 * If the upcall is from a different address, call nfsbind_localhost() 527 * to check for a remapping of localhost, due to jails. 528 * (Since a reserved port # at localhost implies a client with 529 * local root, there won't be a security breach. This is about 530 * the only case I can think of where a reserved port # means 531 * something.) 532 */ 533 if (rqstp->rq_proc != NULLPROC) { 534 switch (fromip.ss_family) { 535 #ifdef INET 536 case AF_INET: 537 if (transp->xp_rtaddr.len < sizeof(*sin)) { 538 syslog(LOG_ERR, "xp_rtaddr too small"); 539 svcerr_weakauth(transp); 540 return; 541 } 542 sin = (struct sockaddr_in *)transp->xp_rtaddr.buf; 543 fromsin = (struct sockaddr_in *)&fromip; 544 sport = ntohs(sin->sin_port); 545 if (sport >= IPPORT_RESERVED) { 546 syslog(LOG_ERR, "not a reserved port#"); 547 svcerr_weakauth(transp); 548 return; 549 } 550 ret = 1; 551 if (sin->sin_addr.s_addr != fromsin->sin_addr.s_addr) 552 ret = nfsbind_localhost(); 553 if (ret == 0 || sin->sin_addr.s_addr != 554 fromsin->sin_addr.s_addr) { 555 syslog(LOG_ERR, "bad from ip %s", 556 inet_ntoa(sin->sin_addr)); 557 svcerr_weakauth(transp); 558 return; 559 } 560 break; 561 #endif /* INET */ 562 #ifdef INET6 563 case AF_INET6: 564 if (transp->xp_rtaddr.len < sizeof(*sin6)) { 565 syslog(LOG_ERR, "xp_rtaddr too small"); 566 svcerr_weakauth(transp); 567 return; 568 } 569 sin6 = (struct sockaddr_in6 *)transp->xp_rtaddr.buf; 570 fromsin6 = (struct sockaddr_in6 *)&fromip; 571 sport = ntohs(sin6->sin6_port); 572 if (sport >= IPV6PORT_RESERVED) { 573 syslog(LOG_ERR, "not a reserved port#"); 574 svcerr_weakauth(transp); 575 return; 576 } 577 ret = 1; 578 if (!IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 579 &fromsin6->sin6_addr)) 580 ret = nfsbind_localhost(); 581 if (ret == 0 || !IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 582 &fromsin6->sin6_addr)) { 583 if (inet_ntop(AF_INET6, &sin6->sin6_addr, buf, 584 INET6_ADDRSTRLEN) != NULL) 585 syslog(LOG_ERR, "bad from ip %s", buf); 586 else 587 syslog(LOG_ERR, "bad from ip6 addr"); 588 svcerr_weakauth(transp); 589 return; 590 } 591 break; 592 #endif /* INET6 */ 593 } 594 } 595 switch (rqstp->rq_proc) { 596 case NULLPROC: 597 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 598 syslog(LOG_ERR, "Can't send reply"); 599 return; 600 case RPCNFSUSERD_GETUID: 601 if (!svc_getargs(transp, (xdrproc_t)xdr_getid, 602 (caddr_t)&info)) { 603 svcerr_decode(transp); 604 return; 605 } 606 pwd = getpwuid((uid_t)info.id); 607 info.retval = 0; 608 if (pwd != NULL) { 609 nid.nid_usertimeout = defusertimeout; 610 nid.nid_uid = pwd->pw_uid; 611 nid.nid_name = pwd->pw_name; 612 if (manage_gids != 0) { 613 /* Get the group list for this user. */ 614 ngroup = NGROUPS; 615 if (getgrouplist(pwd->pw_name, pwd->pw_gid, 616 grps, &ngroup) < 0) 617 syslog(LOG_ERR, "Group list too small"); 618 nid.nid_ngroup = ngroup; 619 nid.nid_grps = grps; 620 } else { 621 nid.nid_ngroup = 0; 622 nid.nid_grps = NULL; 623 } 624 } else { 625 nid.nid_usertimeout = 5; 626 nid.nid_uid = (uid_t)info.id; 627 nid.nid_name = defaultuser; 628 nid.nid_ngroup = 0; 629 nid.nid_grps = NULL; 630 } 631 nid.nid_namelen = strlen(nid.nid_name); 632 nid.nid_flag = NFSID_ADDUID; 633 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 634 if (error) { 635 info.retval = error; 636 syslog(LOG_ERR, "Can't add user %s\n", pwd->pw_name); 637 } else if (verbose) { 638 syslog(LOG_ERR,"Added uid=%d name=%s\n", 639 nid.nid_uid, nid.nid_name); 640 } 641 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 642 (caddr_t)&info)) 643 syslog(LOG_ERR, "Can't send reply"); 644 return; 645 case RPCNFSUSERD_GETGID: 646 if (!svc_getargs(transp, (xdrproc_t)xdr_getid, 647 (caddr_t)&info)) { 648 svcerr_decode(transp); 649 return; 650 } 651 grp = getgrgid((gid_t)info.id); 652 info.retval = 0; 653 if (grp != NULL) { 654 nid.nid_usertimeout = defusertimeout; 655 nid.nid_gid = grp->gr_gid; 656 nid.nid_name = grp->gr_name; 657 } else { 658 nid.nid_usertimeout = 5; 659 nid.nid_gid = (gid_t)info.id; 660 nid.nid_name = defaultgroup; 661 } 662 nid.nid_namelen = strlen(nid.nid_name); 663 nid.nid_ngroup = 0; 664 nid.nid_grps = NULL; 665 nid.nid_flag = NFSID_ADDGID; 666 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 667 if (error) { 668 info.retval = error; 669 syslog(LOG_ERR, "Can't add group %s\n", 670 grp->gr_name); 671 } else if (verbose) { 672 syslog(LOG_ERR,"Added gid=%d name=%s\n", 673 nid.nid_gid, nid.nid_name); 674 } 675 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 676 (caddr_t)&info)) 677 syslog(LOG_ERR, "Can't send reply"); 678 return; 679 case RPCNFSUSERD_GETUSER: 680 if (!svc_getargs(transp, (xdrproc_t)xdr_getname, 681 (caddr_t)&info)) { 682 svcerr_decode(transp); 683 return; 684 } 685 pwd = getpwnam(info.name); 686 info.retval = 0; 687 if (pwd != NULL) { 688 nid.nid_usertimeout = defusertimeout; 689 nid.nid_uid = pwd->pw_uid; 690 nid.nid_name = pwd->pw_name; 691 } else { 692 nid.nid_usertimeout = 5; 693 nid.nid_uid = defaultuid; 694 nid.nid_name = info.name; 695 } 696 nid.nid_namelen = strlen(nid.nid_name); 697 nid.nid_ngroup = 0; 698 nid.nid_grps = NULL; 699 nid.nid_flag = NFSID_ADDUSERNAME; 700 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 701 if (error) { 702 info.retval = error; 703 syslog(LOG_ERR, "Can't add user %s\n", pwd->pw_name); 704 } else if (verbose) { 705 syslog(LOG_ERR,"Added uid=%d name=%s\n", 706 nid.nid_uid, nid.nid_name); 707 } 708 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 709 (caddr_t)&info)) 710 syslog(LOG_ERR, "Can't send reply"); 711 return; 712 case RPCNFSUSERD_GETGROUP: 713 if (!svc_getargs(transp, (xdrproc_t)xdr_getname, 714 (caddr_t)&info)) { 715 svcerr_decode(transp); 716 return; 717 } 718 grp = getgrnam(info.name); 719 info.retval = 0; 720 if (grp != NULL) { 721 nid.nid_usertimeout = defusertimeout; 722 nid.nid_gid = grp->gr_gid; 723 nid.nid_name = grp->gr_name; 724 } else { 725 nid.nid_usertimeout = 5; 726 nid.nid_gid = defaultgid; 727 nid.nid_name = info.name; 728 } 729 nid.nid_namelen = strlen(nid.nid_name); 730 nid.nid_ngroup = 0; 731 nid.nid_grps = NULL; 732 nid.nid_flag = NFSID_ADDGROUPNAME; 733 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 734 if (error) { 735 info.retval = error; 736 syslog(LOG_ERR, "Can't add group %s\n", 737 grp->gr_name); 738 } else if (verbose) { 739 syslog(LOG_ERR,"Added gid=%d name=%s\n", 740 nid.nid_gid, nid.nid_name); 741 } 742 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 743 (caddr_t)&info)) 744 syslog(LOG_ERR, "Can't send reply"); 745 return; 746 default: 747 svcerr_noproc(transp); 748 return; 749 }; 750 } 751 752 /* 753 * Xdr routine to get an id number 754 */ 755 static bool_t 756 xdr_getid(XDR *xdrsp, caddr_t cp) 757 { 758 struct info *ifp = (struct info *)cp; 759 760 return (xdr_long(xdrsp, &ifp->id)); 761 } 762 763 /* 764 * Xdr routine to get a user name 765 */ 766 static bool_t 767 xdr_getname(XDR *xdrsp, caddr_t cp) 768 { 769 struct info *ifp = (struct info *)cp; 770 long len; 771 772 if (!xdr_long(xdrsp, &len)) 773 return (0); 774 if (len > MAXNAME) 775 return (0); 776 if (!xdr_opaque(xdrsp, ifp->name, len)) 777 return (0); 778 ifp->name[len] = '\0'; 779 return (1); 780 } 781 782 /* 783 * Xdr routine to return the value. 784 */ 785 static bool_t 786 xdr_retval(XDR *xdrsp, caddr_t cp) 787 { 788 struct info *ifp = (struct info *)cp; 789 long val; 790 791 val = ifp->retval; 792 return (xdr_long(xdrsp, &val)); 793 } 794 795 /* 796 * cleanup_term() called via SIGUSR1. 797 */ 798 static void 799 cleanup_term(int signo __unused) 800 { 801 int i, cnt; 802 803 if (im_a_slave) 804 exit(0); 805 806 /* 807 * Ok, so I'm the master. 808 * As the Governor of California might say, "Terminate them". 809 */ 810 cnt = 0; 811 for (i = 0; i < nfsuserdcnt; i++) { 812 if (slaves[i] != (pid_t)-1) { 813 cnt++; 814 kill(slaves[i], SIGUSR1); 815 } 816 } 817 818 /* 819 * and wait for them to die 820 */ 821 for (i = 0; i < cnt; i++) 822 wait3(NULL, 0, NULL); 823 824 /* 825 * Finally, get rid of the socket 826 */ 827 if (nfssvc(NFSSVC_NFSUSERDDELPORT, NULL) < 0) { 828 syslog(LOG_ERR, "Can't do nfssvc() to delete the port\n"); 829 exit(1); 830 } 831 exit(0); 832 } 833 834 /* 835 * Get the IP address that the localhost address maps to. 836 * This is needed when jails map localhost to another IP address. 837 */ 838 static int 839 nfsbind_localhost(void) 840 { 841 #ifdef INET 842 struct sockaddr_in sin; 843 #endif 844 #ifdef INET6 845 struct sockaddr_in6 sin6; 846 #endif 847 socklen_t slen; 848 int ret, s; 849 850 switch (fromip.ss_family) { 851 #ifdef INET6 852 case AF_INET6: 853 s = socket(PF_INET6, SOCK_DGRAM, 0); 854 if (s < 0) 855 return (0); 856 memset(&sin6, 0, sizeof(sin6)); 857 sin6.sin6_len = sizeof(sin6); 858 sin6.sin6_family = AF_INET6; 859 sin6.sin6_addr = in6loopback; 860 sin6.sin6_port = 0; 861 ret = bind(s, (struct sockaddr *)&sin6, sizeof(sin6)); 862 if (ret < 0) { 863 close(s); 864 return (0); 865 } 866 break; 867 #endif /* INET6 */ 868 #ifdef INET 869 case AF_INET: 870 s = socket(PF_INET, SOCK_DGRAM, 0); 871 if (s < 0) 872 return (0); 873 memset(&sin, 0, sizeof(sin)); 874 sin.sin_len = sizeof(sin); 875 sin.sin_family = AF_INET; 876 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 877 sin.sin_port = 0; 878 ret = bind(s, (struct sockaddr *)&sin, sizeof(sin)); 879 if (ret < 0) { 880 close(s); 881 return (0); 882 } 883 break; 884 #endif /* INET */ 885 } 886 memset(&fromip, 0, sizeof(fromip)); 887 slen = sizeof(fromip); 888 ret = getsockname(s, (struct sockaddr *)&fromip, &slen); 889 close(s); 890 if (ret < 0) 891 return (0); 892 return (1); 893 } 894 895 static void 896 usage(void) 897 { 898 899 errx(1, 900 "usage: nfsuserd [-usermax cache_size] [-usertimeout minutes] [-verbose] [-manage-gids] [-domain domain_name] [n]"); 901 } 902