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/param.h> 29 #include <sys/errno.h> 30 #include <sys/linker.h> 31 #include <sys/module.h> 32 #include <sys/mount.h> 33 #include <sys/socket.h> 34 #include <sys/socketvar.h> 35 #include <sys/sysctl.h> 36 #include <sys/time.h> 37 #include <sys/ucred.h> 38 #include <sys/vnode.h> 39 #include <sys/wait.h> 40 41 #include <netinet/in.h> 42 43 #include <arpa/inet.h> 44 45 #include <nfs/nfssvc.h> 46 47 #include <rpc/rpc.h> 48 49 #include <fs/nfs/rpcv2.h> 50 #include <fs/nfs/nfsproto.h> 51 #include <fs/nfs/nfskpiport.h> 52 #include <fs/nfs/nfs.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <grp.h> 57 #include <netdb.h> 58 #include <pwd.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <syslog.h> 64 #include <unistd.h> 65 66 /* 67 * This program loads the password and group databases into the kernel 68 * for NFS V4. 69 */ 70 71 static void cleanup_term(int); 72 static void usage(void); 73 static void nfsuserdsrv(struct svc_req *, SVCXPRT *); 74 static bool_t xdr_getid(XDR *, caddr_t); 75 static bool_t xdr_getname(XDR *, caddr_t); 76 static bool_t xdr_retval(XDR *, caddr_t); 77 static int nfsbind_localhost(void); 78 79 #define MAXNAME 1024 80 #define MAXNFSUSERD 20 81 #define DEFNFSUSERD 4 82 #define MAXUSERMAX 100000 83 #define MINUSERMAX 10 84 #define DEFUSERMAX 200 85 #define DEFUSERTIMEOUT (1 * 60) 86 struct info { 87 long id; 88 long retval; 89 char name[MAXNAME + 1]; 90 }; 91 92 u_char *dnsname = "default.domain"; 93 u_char *defaultuser = "nobody"; 94 uid_t defaultuid = 65534; 95 u_char *defaultgroup = "nogroup"; 96 gid_t defaultgid = 65533; 97 int verbose = 0, im_a_server = 0, nfsuserdcnt = -1, forcestart = 0; 98 int defusertimeout = DEFUSERTIMEOUT, manage_gids = 0; 99 pid_t servers[MAXNFSUSERD]; 100 static struct sockaddr_storage fromip; 101 #ifdef INET6 102 static struct in6_addr in6loopback = IN6ADDR_LOOPBACK_INIT; 103 #endif 104 105 int 106 main(int argc, char *argv[]) 107 { 108 int i, j; 109 int error, fnd_dup, len, mustfreeai = 0, start_uidpos; 110 struct nfsd_idargs nid; 111 struct passwd *pwd; 112 struct group *grp; 113 int sock, one = 1; 114 SVCXPRT *udptransp; 115 struct nfsuserd_args nargs; 116 sigset_t signew; 117 char hostname[MAXHOSTNAMELEN + 1], *cp; 118 struct addrinfo *aip, hints; 119 static uid_t check_dups[MAXUSERMAX]; 120 gid_t grps[NGROUPS]; 121 int ngroup; 122 #ifdef INET 123 struct sockaddr_in *sin; 124 #endif 125 #ifdef INET6 126 struct sockaddr_in6 *sin6; 127 #endif 128 int jailed, s; 129 size_t jailed_size; 130 131 if (modfind("nfscommon") < 0) { 132 /* Not present in kernel, try loading it */ 133 if (kldload("nfscommon") < 0 || 134 modfind("nfscommon") < 0) 135 errx(1, "Experimental nfs subsystem is not available"); 136 } 137 138 /* 139 * First, figure out what our domain name and Kerberos Realm 140 * seem to be. Command line args may override these later. 141 */ 142 if (gethostname(hostname, MAXHOSTNAMELEN) == 0) { 143 if ((cp = strchr(hostname, '.')) != NULL && 144 *(cp + 1) != '\0') { 145 dnsname = cp + 1; 146 } else { 147 memset((void *)&hints, 0, sizeof (hints)); 148 hints.ai_flags = AI_CANONNAME; 149 error = getaddrinfo(hostname, NULL, &hints, &aip); 150 if (error == 0) { 151 if (aip->ai_canonname != NULL && 152 (cp = strchr(aip->ai_canonname, '.')) != NULL 153 && *(cp + 1) != '\0') { 154 dnsname = cp + 1; 155 mustfreeai = 1; 156 } else { 157 freeaddrinfo(aip); 158 } 159 } 160 } 161 } 162 163 /* 164 * See if this server handles IPv4 or IPv6 and set up the default 165 * localhost address. 166 */ 167 s = -1; 168 #ifdef INET6 169 s = socket(PF_INET6, SOCK_DGRAM, 0); 170 if (s >= 0) { 171 fromip.ss_family = AF_INET6; 172 fromip.ss_len = sizeof(struct sockaddr_in6); 173 sin6 = (struct sockaddr_in6 *)&fromip; 174 sin6->sin6_addr = in6loopback; 175 close(s); 176 } 177 #endif /* INET6 */ 178 #ifdef INET 179 if (s < 0) { 180 s = socket(PF_INET, SOCK_DGRAM, 0); 181 if (s >= 0) { 182 fromip.ss_family = AF_INET; 183 fromip.ss_len = sizeof(struct sockaddr_in); 184 sin = (struct sockaddr_in *)&fromip; 185 sin->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 186 close(s); 187 } 188 } 189 #endif /* INET */ 190 if (s < 0) 191 err(1, "Can't create a inet/inet6 socket"); 192 193 nid.nid_usermax = DEFUSERMAX; 194 nid.nid_usertimeout = defusertimeout; 195 196 argc--; 197 argv++; 198 while (argc >= 1) { 199 if (!strcmp(*argv, "-domain")) { 200 if (argc == 1) 201 usage(); 202 argc--; 203 argv++; 204 strncpy(hostname, *argv, MAXHOSTNAMELEN); 205 hostname[MAXHOSTNAMELEN] = '\0'; 206 dnsname = hostname; 207 } else if (!strcmp(*argv, "-verbose")) { 208 verbose = 1; 209 } else if (!strcmp(*argv, "-force")) { 210 forcestart = 1; 211 } else if (!strcmp(*argv, "-manage-gids")) { 212 manage_gids = 1; 213 } else if (!strcmp(*argv, "-usermax")) { 214 if (argc == 1) 215 usage(); 216 argc--; 217 argv++; 218 i = atoi(*argv); 219 if (i < MINUSERMAX || i > MAXUSERMAX) { 220 fprintf(stderr, 221 "usermax %d out of range %d<->%d\n", i, 222 MINUSERMAX, MAXUSERMAX); 223 usage(); 224 } 225 nid.nid_usermax = i; 226 } else if (!strcmp(*argv, "-usertimeout")) { 227 if (argc == 1) 228 usage(); 229 argc--; 230 argv++; 231 i = atoi(*argv); 232 if (i < 0 || i > 100000) { 233 fprintf(stderr, 234 "usertimeout %d out of range 0<->100000\n", 235 i); 236 usage(); 237 } 238 nid.nid_usertimeout = defusertimeout = i * 60; 239 } else if (nfsuserdcnt == -1) { 240 nfsuserdcnt = atoi(*argv); 241 if (nfsuserdcnt < 1) 242 usage(); 243 if (nfsuserdcnt > MAXNFSUSERD) { 244 warnx("nfsuserd count %d; reset to %d", 245 nfsuserdcnt, DEFNFSUSERD); 246 nfsuserdcnt = DEFNFSUSERD; 247 } 248 } else { 249 usage(); 250 } 251 argc--; 252 argv++; 253 } 254 if (nfsuserdcnt < 1) 255 nfsuserdcnt = DEFNFSUSERD; 256 257 /* 258 * Strip off leading and trailing '.'s in domain name and map 259 * alphabetics to lower case. 260 */ 261 while (*dnsname == '.') 262 dnsname++; 263 if (*dnsname == '\0') 264 errx(1, "Domain name all '.'"); 265 len = strlen(dnsname); 266 cp = dnsname + len - 1; 267 while (*cp == '.') { 268 *cp = '\0'; 269 len--; 270 cp--; 271 } 272 for (i = 0; i < len; i++) { 273 if (!isascii(dnsname[i])) 274 errx(1, "Domain name has non-ascii char"); 275 if (isupper(dnsname[i])) 276 dnsname[i] = tolower(dnsname[i]); 277 } 278 279 /* 280 * If the nfsuserd died off ungracefully, this is necessary to 281 * get them to start again. 282 */ 283 if (forcestart && nfssvc(NFSSVC_NFSUSERDDELPORT, NULL) < 0) 284 errx(1, "Can't do nfssvc() to delete the port"); 285 286 if (verbose) 287 fprintf(stderr, 288 "nfsuserd: domain=%s usermax=%d usertimeout=%d\n", 289 dnsname, nid.nid_usermax, nid.nid_usertimeout); 290 291 for (i = 0; i < nfsuserdcnt; i++) 292 servers[i] = (pid_t)-1; 293 294 nargs.nuserd_family = fromip.ss_family; 295 /* 296 * Set up the service port to accept requests via UDP from 297 * localhost (INADDR_LOOPBACK or IN6ADDR_LOOPBACK_INIT). 298 */ 299 if ((sock = socket(nargs.nuserd_family, SOCK_DGRAM, IPPROTO_UDP)) < 0) 300 err(1, "cannot create udp socket"); 301 302 /* 303 * Not sure what this does, so I'll leave it here for now. 304 */ 305 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); 306 307 if ((udptransp = svcudp_create(sock)) == NULL) 308 err(1, "Can't set up socket"); 309 310 /* 311 * By not specifying a protocol, it is linked into the 312 * dispatch queue, but not registered with portmapper, 313 * which is just what I want. 314 */ 315 if (!svc_register(udptransp, RPCPROG_NFSUSERD, RPCNFSUSERD_VERS, 316 nfsuserdsrv, 0)) 317 err(1, "Can't register nfsuserd"); 318 319 /* 320 * Tell the kernel what my port# is. 321 */ 322 nargs.nuserd_port = htons(udptransp->xp_port); 323 #ifdef DEBUG 324 printf("portnum=0x%x\n", nargs.nuserd_port); 325 #else 326 if (nfssvc(NFSSVC_NFSUSERDPORT | NFSSVC_NEWSTRUCT, &nargs) < 0) { 327 if (errno == EPERM) { 328 jailed = 0; 329 jailed_size = sizeof(jailed); 330 sysctlbyname("security.jail.jailed", &jailed, 331 &jailed_size, NULL, 0); 332 if (jailed != 0) { 333 fprintf(stderr, "Cannot start nfsuserd. " 334 "allow.nfsd might not be configured\n"); 335 } else { 336 fprintf(stderr, "Cannot start nfsuserd " 337 "when already running."); 338 fprintf(stderr, " If not running, " 339 "use the -force option.\n"); 340 } 341 } else { 342 fprintf(stderr, "Can't do nfssvc() to add port\n"); 343 } 344 exit(1); 345 } 346 #endif 347 348 pwd = getpwnam(defaultuser); 349 if (pwd) 350 nid.nid_uid = pwd->pw_uid; 351 else 352 nid.nid_uid = defaultuid; 353 grp = getgrnam(defaultgroup); 354 if (grp) 355 nid.nid_gid = grp->gr_gid; 356 else 357 nid.nid_gid = defaultgid; 358 nid.nid_name = dnsname; 359 nid.nid_namelen = strlen(nid.nid_name); 360 nid.nid_ngroup = 0; 361 nid.nid_grps = NULL; 362 nid.nid_flag = NFSID_INITIALIZE; 363 #ifdef DEBUG 364 printf("Initialize uid=%d gid=%d dns=%s\n", nid.nid_uid, nid.nid_gid, 365 nid.nid_name); 366 #else 367 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 368 if (error) 369 errx(1, "Can't initialize nfs user/groups"); 370 #endif 371 372 i = 0; 373 /* 374 * Loop around adding all groups. 375 */ 376 setgrent(); 377 while (i < nid.nid_usermax && (grp = getgrent())) { 378 nid.nid_gid = grp->gr_gid; 379 nid.nid_name = grp->gr_name; 380 nid.nid_namelen = strlen(grp->gr_name); 381 nid.nid_ngroup = 0; 382 nid.nid_grps = NULL; 383 nid.nid_flag = NFSID_ADDGID; 384 #ifdef DEBUG 385 printf("add gid=%d name=%s\n", nid.nid_gid, nid.nid_name); 386 #else 387 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 388 if (error) 389 errx(1, "Can't add group %s", grp->gr_name); 390 #endif 391 i++; 392 } 393 endgrent(); 394 395 /* 396 * Loop around adding all users. 397 */ 398 start_uidpos = i; 399 setpwent(); 400 while (i < nid.nid_usermax && (pwd = getpwent())) { 401 fnd_dup = 0; 402 /* 403 * Yes, this is inefficient, but it is only done once when 404 * the daemon is started and will run in a fraction of a second 405 * for nid_usermax at 10000. If nid_usermax is cranked up to 406 * 100000, it will take several seconds, depending on the CPU. 407 */ 408 for (j = 0; j < (i - start_uidpos); j++) 409 if (check_dups[j] == pwd->pw_uid) { 410 /* Found another entry for uid, so skip it */ 411 fnd_dup = 1; 412 break; 413 } 414 if (fnd_dup != 0) 415 continue; 416 check_dups[i - start_uidpos] = pwd->pw_uid; 417 nid.nid_uid = pwd->pw_uid; 418 nid.nid_name = pwd->pw_name; 419 nid.nid_namelen = strlen(pwd->pw_name); 420 if (manage_gids != 0) { 421 /* Get the group list for this user. */ 422 ngroup = NGROUPS; 423 if (getgrouplist(pwd->pw_name, pwd->pw_gid, grps, 424 &ngroup) < 0) 425 syslog(LOG_ERR, "Group list too small"); 426 nid.nid_ngroup = ngroup; 427 nid.nid_grps = grps; 428 } else { 429 nid.nid_ngroup = 0; 430 nid.nid_grps = NULL; 431 } 432 nid.nid_flag = NFSID_ADDUID; 433 #ifdef DEBUG 434 printf("add uid=%d name=%s\n", nid.nid_uid, nid.nid_name); 435 #else 436 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 437 if (error) 438 errx(1, "Can't add user %s", pwd->pw_name); 439 #endif 440 i++; 441 } 442 endpwent(); 443 444 /* 445 * I should feel guilty for not calling this for all the above exit() 446 * upon error cases, but I don't. 447 */ 448 if (mustfreeai) 449 freeaddrinfo(aip); 450 451 #ifdef DEBUG 452 exit(0); 453 #endif 454 /* 455 * Temporarily block SIGUSR1 and SIGCHLD, so servers[] can't 456 * end up bogus. 457 */ 458 sigemptyset(&signew); 459 sigaddset(&signew, SIGUSR1); 460 sigaddset(&signew, SIGCHLD); 461 sigprocmask(SIG_BLOCK, &signew, NULL); 462 463 daemon(0, 0); 464 (void)signal(SIGHUP, SIG_IGN); 465 (void)signal(SIGINT, SIG_IGN); 466 (void)signal(SIGQUIT, SIG_IGN); 467 (void)signal(SIGTERM, SIG_IGN); 468 (void)signal(SIGUSR1, cleanup_term); 469 (void)signal(SIGCHLD, cleanup_term); 470 471 openlog("nfsuserd:", LOG_PID, LOG_DAEMON); 472 473 /* 474 * Fork off the server daemons that do the work. All the master 475 * does is terminate them and cleanup. 476 */ 477 for (i = 0; i < nfsuserdcnt; i++) { 478 servers[i] = fork(); 479 if (servers[i] == 0) { 480 im_a_server = 1; 481 setproctitle("server"); 482 sigemptyset(&signew); 483 sigaddset(&signew, SIGUSR1); 484 sigprocmask(SIG_UNBLOCK, &signew, NULL); 485 486 /* 487 * and away we go. 488 */ 489 svc_run(); 490 syslog(LOG_ERR, "nfsuserd died: %m"); 491 exit(1); 492 } else if (servers[i] < 0) { 493 syslog(LOG_ERR, "fork: %m"); 494 } 495 } 496 497 /* 498 * Just wait for SIGUSR1 or a child to die and then... 499 * As the Governor of California would say, "Terminate them". 500 */ 501 setproctitle("master"); 502 sigemptyset(&signew); 503 while (1) 504 sigsuspend(&signew); 505 } 506 507 /* 508 * The nfsuserd rpc service 509 */ 510 static void 511 nfsuserdsrv(struct svc_req *rqstp, SVCXPRT *transp) 512 { 513 struct passwd *pwd; 514 struct group *grp; 515 int error; 516 #if defined(INET) || defined(INET6) 517 u_short sport; 518 int ret; 519 #endif 520 struct info info; 521 struct nfsd_idargs nid; 522 gid_t grps[NGROUPS]; 523 int ngroup; 524 #ifdef INET 525 struct sockaddr_in *fromsin, *sin; 526 #endif 527 #ifdef INET6 528 struct sockaddr_in6 *fromsin6, *sin6; 529 char buf[INET6_ADDRSTRLEN]; 530 #endif 531 532 /* 533 * Only handle requests from localhost on a reserved port number. 534 * If the upcall is from a different address, call nfsbind_localhost() 535 * to check for a remapping of localhost, due to jails. 536 * (Since a reserved port # at localhost implies a client with 537 * local root, there won't be a security breach. This is about 538 * the only case I can think of where a reserved port # means 539 * something.) 540 */ 541 if (rqstp->rq_proc != NULLPROC) { 542 switch (fromip.ss_family) { 543 #ifdef INET 544 case AF_INET: 545 if (transp->xp_rtaddr.len < sizeof(*sin)) { 546 syslog(LOG_ERR, "xp_rtaddr too small"); 547 svcerr_weakauth(transp); 548 return; 549 } 550 sin = (struct sockaddr_in *)transp->xp_rtaddr.buf; 551 fromsin = (struct sockaddr_in *)&fromip; 552 sport = ntohs(sin->sin_port); 553 if (sport >= IPPORT_RESERVED) { 554 syslog(LOG_ERR, "not a reserved port#"); 555 svcerr_weakauth(transp); 556 return; 557 } 558 ret = 1; 559 if (sin->sin_addr.s_addr != fromsin->sin_addr.s_addr) 560 ret = nfsbind_localhost(); 561 if (ret == 0 || sin->sin_addr.s_addr != 562 fromsin->sin_addr.s_addr) { 563 syslog(LOG_ERR, "bad from ip %s", 564 inet_ntoa(sin->sin_addr)); 565 svcerr_weakauth(transp); 566 return; 567 } 568 break; 569 #endif /* INET */ 570 #ifdef INET6 571 case AF_INET6: 572 if (transp->xp_rtaddr.len < sizeof(*sin6)) { 573 syslog(LOG_ERR, "xp_rtaddr too small"); 574 svcerr_weakauth(transp); 575 return; 576 } 577 sin6 = (struct sockaddr_in6 *)transp->xp_rtaddr.buf; 578 fromsin6 = (struct sockaddr_in6 *)&fromip; 579 sport = ntohs(sin6->sin6_port); 580 if (sport >= IPV6PORT_RESERVED) { 581 syslog(LOG_ERR, "not a reserved port#"); 582 svcerr_weakauth(transp); 583 return; 584 } 585 ret = 1; 586 if (!IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 587 &fromsin6->sin6_addr)) 588 ret = nfsbind_localhost(); 589 if (ret == 0 || !IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 590 &fromsin6->sin6_addr)) { 591 if (inet_ntop(AF_INET6, &sin6->sin6_addr, buf, 592 INET6_ADDRSTRLEN) != NULL) 593 syslog(LOG_ERR, "bad from ip %s", buf); 594 else 595 syslog(LOG_ERR, "bad from ip6 addr"); 596 svcerr_weakauth(transp); 597 return; 598 } 599 break; 600 #endif /* INET6 */ 601 } 602 } 603 switch (rqstp->rq_proc) { 604 case NULLPROC: 605 if (!svc_sendreply(transp, (xdrproc_t)xdr_void, NULL)) 606 syslog(LOG_ERR, "Can't send reply"); 607 return; 608 case RPCNFSUSERD_GETUID: 609 if (!svc_getargs(transp, (xdrproc_t)xdr_getid, 610 (caddr_t)&info)) { 611 svcerr_decode(transp); 612 return; 613 } 614 pwd = getpwuid((uid_t)info.id); 615 info.retval = 0; 616 if (pwd != NULL) { 617 nid.nid_usertimeout = defusertimeout; 618 nid.nid_uid = pwd->pw_uid; 619 nid.nid_name = pwd->pw_name; 620 if (manage_gids != 0) { 621 /* Get the group list for this user. */ 622 ngroup = NGROUPS; 623 if (getgrouplist(pwd->pw_name, pwd->pw_gid, 624 grps, &ngroup) < 0) 625 syslog(LOG_ERR, "Group list too small"); 626 nid.nid_ngroup = ngroup; 627 nid.nid_grps = grps; 628 } else { 629 nid.nid_ngroup = 0; 630 nid.nid_grps = NULL; 631 } 632 } else { 633 nid.nid_usertimeout = 5; 634 nid.nid_uid = (uid_t)info.id; 635 nid.nid_name = defaultuser; 636 nid.nid_ngroup = 0; 637 nid.nid_grps = NULL; 638 } 639 nid.nid_namelen = strlen(nid.nid_name); 640 nid.nid_flag = NFSID_ADDUID; 641 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 642 if (error) { 643 info.retval = error; 644 syslog(LOG_ERR, "Can't add user %s\n", pwd->pw_name); 645 } else if (verbose) { 646 syslog(LOG_ERR,"Added uid=%d name=%s\n", 647 nid.nid_uid, nid.nid_name); 648 } 649 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 650 (caddr_t)&info)) 651 syslog(LOG_ERR, "Can't send reply"); 652 return; 653 case RPCNFSUSERD_GETGID: 654 if (!svc_getargs(transp, (xdrproc_t)xdr_getid, 655 (caddr_t)&info)) { 656 svcerr_decode(transp); 657 return; 658 } 659 grp = getgrgid((gid_t)info.id); 660 info.retval = 0; 661 if (grp != NULL) { 662 nid.nid_usertimeout = defusertimeout; 663 nid.nid_gid = grp->gr_gid; 664 nid.nid_name = grp->gr_name; 665 } else { 666 nid.nid_usertimeout = 5; 667 nid.nid_gid = (gid_t)info.id; 668 nid.nid_name = defaultgroup; 669 } 670 nid.nid_namelen = strlen(nid.nid_name); 671 nid.nid_ngroup = 0; 672 nid.nid_grps = NULL; 673 nid.nid_flag = NFSID_ADDGID; 674 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 675 if (error) { 676 info.retval = error; 677 syslog(LOG_ERR, "Can't add group %s\n", 678 grp->gr_name); 679 } else if (verbose) { 680 syslog(LOG_ERR,"Added gid=%d name=%s\n", 681 nid.nid_gid, nid.nid_name); 682 } 683 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 684 (caddr_t)&info)) 685 syslog(LOG_ERR, "Can't send reply"); 686 return; 687 case RPCNFSUSERD_GETUSER: 688 if (!svc_getargs(transp, (xdrproc_t)xdr_getname, 689 (caddr_t)&info)) { 690 svcerr_decode(transp); 691 return; 692 } 693 pwd = getpwnam(info.name); 694 info.retval = 0; 695 if (pwd != NULL) { 696 nid.nid_usertimeout = defusertimeout; 697 nid.nid_uid = pwd->pw_uid; 698 nid.nid_name = pwd->pw_name; 699 } else { 700 nid.nid_usertimeout = 5; 701 nid.nid_uid = defaultuid; 702 nid.nid_name = info.name; 703 } 704 nid.nid_namelen = strlen(nid.nid_name); 705 nid.nid_ngroup = 0; 706 nid.nid_grps = NULL; 707 nid.nid_flag = NFSID_ADDUSERNAME; 708 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 709 if (error) { 710 info.retval = error; 711 syslog(LOG_ERR, "Can't add user %s\n", pwd->pw_name); 712 } else if (verbose) { 713 syslog(LOG_ERR,"Added uid=%d name=%s\n", 714 nid.nid_uid, nid.nid_name); 715 } 716 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 717 (caddr_t)&info)) 718 syslog(LOG_ERR, "Can't send reply"); 719 return; 720 case RPCNFSUSERD_GETGROUP: 721 if (!svc_getargs(transp, (xdrproc_t)xdr_getname, 722 (caddr_t)&info)) { 723 svcerr_decode(transp); 724 return; 725 } 726 grp = getgrnam(info.name); 727 info.retval = 0; 728 if (grp != NULL) { 729 nid.nid_usertimeout = defusertimeout; 730 nid.nid_gid = grp->gr_gid; 731 nid.nid_name = grp->gr_name; 732 } else { 733 nid.nid_usertimeout = 5; 734 nid.nid_gid = defaultgid; 735 nid.nid_name = info.name; 736 } 737 nid.nid_namelen = strlen(nid.nid_name); 738 nid.nid_ngroup = 0; 739 nid.nid_grps = NULL; 740 nid.nid_flag = NFSID_ADDGROUPNAME; 741 error = nfssvc(NFSSVC_IDNAME | NFSSVC_NEWSTRUCT, &nid); 742 if (error) { 743 info.retval = error; 744 syslog(LOG_ERR, "Can't add group %s\n", 745 grp->gr_name); 746 } else if (verbose) { 747 syslog(LOG_ERR,"Added gid=%d name=%s\n", 748 nid.nid_gid, nid.nid_name); 749 } 750 if (!svc_sendreply(transp, (xdrproc_t)xdr_retval, 751 (caddr_t)&info)) 752 syslog(LOG_ERR, "Can't send reply"); 753 return; 754 default: 755 svcerr_noproc(transp); 756 return; 757 }; 758 } 759 760 /* 761 * Xdr routine to get an id number 762 */ 763 static bool_t 764 xdr_getid(XDR *xdrsp, caddr_t cp) 765 { 766 struct info *ifp = (struct info *)cp; 767 768 return (xdr_long(xdrsp, &ifp->id)); 769 } 770 771 /* 772 * Xdr routine to get a user name 773 */ 774 static bool_t 775 xdr_getname(XDR *xdrsp, caddr_t cp) 776 { 777 struct info *ifp = (struct info *)cp; 778 long len; 779 780 if (!xdr_long(xdrsp, &len)) 781 return (0); 782 if (len > MAXNAME) 783 return (0); 784 if (!xdr_opaque(xdrsp, ifp->name, len)) 785 return (0); 786 ifp->name[len] = '\0'; 787 return (1); 788 } 789 790 /* 791 * Xdr routine to return the value. 792 */ 793 static bool_t 794 xdr_retval(XDR *xdrsp, caddr_t cp) 795 { 796 struct info *ifp = (struct info *)cp; 797 long val; 798 799 val = ifp->retval; 800 return (xdr_long(xdrsp, &val)); 801 } 802 803 /* 804 * cleanup_term() called via SIGUSR1. 805 */ 806 static void 807 cleanup_term(int signo __unused) 808 { 809 int i, cnt; 810 811 if (im_a_server) 812 exit(0); 813 814 /* 815 * Ok, so I'm the master. 816 * As the Governor of California might say, "Terminate them". 817 */ 818 cnt = 0; 819 for (i = 0; i < nfsuserdcnt; i++) { 820 if (servers[i] != (pid_t)-1) { 821 cnt++; 822 kill(servers[i], SIGUSR1); 823 } 824 } 825 826 /* 827 * and wait for them to die 828 */ 829 for (i = 0; i < cnt; i++) 830 wait3(NULL, 0, NULL); 831 832 /* 833 * Finally, get rid of the socket 834 */ 835 if (nfssvc(NFSSVC_NFSUSERDDELPORT, NULL) < 0) { 836 syslog(LOG_ERR, "Can't do nfssvc() to delete the port\n"); 837 exit(1); 838 } 839 exit(0); 840 } 841 842 /* 843 * Get the IP address that the localhost address maps to. 844 * This is needed when jails map localhost to another IP address. 845 */ 846 static int 847 nfsbind_localhost(void) 848 { 849 #ifdef INET 850 struct sockaddr_in sin; 851 #endif 852 #ifdef INET6 853 struct sockaddr_in6 sin6; 854 #endif 855 socklen_t slen; 856 int ret, s; 857 858 switch (fromip.ss_family) { 859 #ifdef INET6 860 case AF_INET6: 861 s = socket(PF_INET6, SOCK_DGRAM, 0); 862 if (s < 0) 863 return (0); 864 memset(&sin6, 0, sizeof(sin6)); 865 sin6.sin6_len = sizeof(sin6); 866 sin6.sin6_family = AF_INET6; 867 sin6.sin6_addr = in6loopback; 868 sin6.sin6_port = 0; 869 ret = bind(s, (struct sockaddr *)&sin6, sizeof(sin6)); 870 if (ret < 0) { 871 close(s); 872 return (0); 873 } 874 break; 875 #endif /* INET6 */ 876 #ifdef INET 877 case AF_INET: 878 s = socket(PF_INET, SOCK_DGRAM, 0); 879 if (s < 0) 880 return (0); 881 memset(&sin, 0, sizeof(sin)); 882 sin.sin_len = sizeof(sin); 883 sin.sin_family = AF_INET; 884 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 885 sin.sin_port = 0; 886 ret = bind(s, (struct sockaddr *)&sin, sizeof(sin)); 887 if (ret < 0) { 888 close(s); 889 return (0); 890 } 891 break; 892 #endif /* INET */ 893 } 894 memset(&fromip, 0, sizeof(fromip)); 895 slen = sizeof(fromip); 896 ret = getsockname(s, (struct sockaddr *)&fromip, &slen); 897 close(s); 898 if (ret < 0) 899 return (0); 900 return (1); 901 } 902 903 static void 904 usage(void) 905 { 906 907 errx(1, 908 "usage: nfsuserd [-usermax cache_size] [-usertimeout minutes] [-verbose] [-manage-gids] [-domain domain_name] [n]"); 909 } 910