1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 24 */ 25 26 #include <assert.h> 27 #include <syslog.h> 28 #include <door.h> 29 #include <fcntl.h> 30 #include <string.h> 31 #include <strings.h> 32 #include <stdlib.h> 33 #include <unistd.h> 34 #include <errno.h> 35 #include <sys/mman.h> 36 #include <smbsrv/libsmb.h> 37 #include <smbsrv/wintypes.h> 38 #include <smbsrv/smb_door.h> 39 40 static int smb_door_call(uint32_t, void *, xdrproc_t, void *, xdrproc_t); 41 static int smb_door_call_private(int, smb_doorarg_t *); 42 static int smb_door_encode(smb_doorarg_t *, uint32_t); 43 static int smb_door_decode(smb_doorarg_t *); 44 static void smb_door_sethdr(smb_doorhdr_t *, uint32_t, uint32_t); 45 static boolean_t smb_door_chkhdr(smb_doorarg_t *, smb_doorhdr_t *); 46 static void smb_door_free(door_arg_t *arg); 47 48 /* 49 * Given a SID, make a door call to get the associated name. 50 * 51 * Returns 0 if the door call is successful, otherwise -1. 52 * 53 * If 0 is returned, the lookup result will be available in a_status. 54 * NT_STATUS_SUCCESS The SID was mapped to a name. 55 * NT_STATUS_NONE_MAPPED The SID could not be mapped to a name. 56 */ 57 int 58 smb_lookup_sid(const char *sid, lsa_account_t *acct) 59 { 60 int rc; 61 62 assert((sid != NULL) && (acct != NULL)); 63 64 bzero(acct, sizeof (lsa_account_t)); 65 (void) strlcpy(acct->a_sid, sid, SMB_SID_STRSZ); 66 67 rc = smb_door_call(SMB_DR_LOOKUP_SID, acct, lsa_account_xdr, 68 acct, lsa_account_xdr); 69 70 if (rc != 0) 71 syslog(LOG_DEBUG, "smb_lookup_sid: %m"); 72 return (rc); 73 } 74 75 /* 76 * Given a name, make a door call to get the associated SID. 77 * 78 * Returns 0 if the door call is successful, otherwise -1. 79 * 80 * If 0 is returned, the lookup result will be available in a_status. 81 * NT_STATUS_SUCCESS The name was mapped to a SID. 82 * NT_STATUS_NONE_MAPPED The name could not be mapped to a SID. 83 */ 84 int 85 smb_lookup_name(const char *name, sid_type_t sidtype, lsa_account_t *acct) 86 { 87 char tmp[MAXNAMELEN]; 88 char *dp = NULL; 89 char *np = NULL; 90 int rc; 91 92 assert((name != NULL) && (acct != NULL)); 93 94 (void) strlcpy(tmp, name, MAXNAMELEN); 95 smb_name_parse(tmp, &np, &dp); 96 97 bzero(acct, sizeof (lsa_account_t)); 98 acct->a_sidtype = sidtype; 99 100 if (dp != NULL && np != NULL) { 101 (void) strlcpy(acct->a_domain, dp, MAXNAMELEN); 102 (void) strlcpy(acct->a_name, np, MAXNAMELEN); 103 } else { 104 (void) strlcpy(acct->a_name, name, MAXNAMELEN); 105 } 106 107 rc = smb_door_call(SMB_DR_LOOKUP_NAME, acct, lsa_account_xdr, 108 acct, lsa_account_xdr); 109 110 if (rc != 0) 111 syslog(LOG_DEBUG, "smb_lookup_name: %m"); 112 return (rc); 113 } 114 115 uint32_t 116 smb_join(smb_joininfo_t *jdi) 117 { 118 uint32_t status; 119 int rc; 120 121 if (jdi == NULL) 122 return (NT_STATUS_INVALID_PARAMETER); 123 124 rc = smb_door_call(SMB_DR_JOIN, jdi, smb_joininfo_xdr, 125 &status, xdr_uint32_t); 126 127 if (rc != 0) { 128 /* 129 * This usually means the SMB service is not running. 130 */ 131 syslog(LOG_DEBUG, "smb_join: %m"); 132 status = NT_STATUS_SERVER_DISABLED; 133 } 134 135 return (status); 136 } 137 138 /* 139 * Get information about the Domain Controller in the joined resource domain. 140 * 141 * Returns NT status codes. 142 */ 143 uint32_t 144 smb_get_dcinfo(char *namebuf, uint32_t namebuflen, smb_inaddr_t *ipaddr) 145 { 146 smb_string_t dcname; 147 struct hostent *h; 148 int rc; 149 150 assert((namebuf != NULL) && (namebuflen != 0)); 151 *namebuf = '\0'; 152 bzero(&dcname, sizeof (smb_string_t)); 153 154 rc = smb_door_call(SMB_DR_GET_DCINFO, NULL, NULL, 155 &dcname, smb_string_xdr); 156 157 if (rc != 0) { 158 syslog(LOG_DEBUG, "smb_get_dcinfo: %m"); 159 if (dcname.buf) 160 xdr_free(smb_string_xdr, (char *)&dcname); 161 return (NT_STATUS_INTERNAL_ERROR); 162 } 163 164 if (dcname.buf) { 165 (void) strlcpy(namebuf, dcname.buf, namebuflen); 166 167 if ((h = smb_gethostbyname(dcname.buf, &rc)) == NULL) { 168 bzero(ipaddr, sizeof (smb_inaddr_t)); 169 } else { 170 (void) memcpy(ipaddr, h->h_addr, h->h_length); 171 ipaddr->a_family = h->h_addrtype; 172 freehostent(h); 173 } 174 xdr_free(smb_string_xdr, (char *)&dcname); 175 } 176 177 return (NT_STATUS_SUCCESS); 178 } 179 180 bool_t 181 smb_joininfo_xdr(XDR *xdrs, smb_joininfo_t *objp) 182 { 183 if (!xdr_vector(xdrs, (char *)objp->domain_name, MAXHOSTNAMELEN, 184 sizeof (char), (xdrproc_t)xdr_char)) 185 return (FALSE); 186 187 if (!xdr_vector(xdrs, (char *)objp->domain_username, 188 SMB_USERNAME_MAXLEN + 1, sizeof (char), (xdrproc_t)xdr_char)) 189 return (FALSE); 190 191 if (!xdr_vector(xdrs, (char *)objp->domain_passwd, 192 SMB_PASSWD_MAXLEN + 1, sizeof (char), (xdrproc_t)xdr_char)) 193 return (FALSE); 194 195 if (!xdr_uint32_t(xdrs, &objp->mode)) 196 return (FALSE); 197 198 return (TRUE); 199 } 200 201 /* 202 * Parameters: 203 * fqdn (input) - fully-qualified domain name 204 * buf (output) - fully-qualified hostname of the AD server found 205 * by this function. 206 * buflen (input) - length of the 'buf' 207 * 208 * Return: 209 * B_TRUE if an AD server is found. Otherwise, returns B_FALSE; 210 * 211 * The buffer passed in should be big enough to hold a fully-qualified 212 * hostname (MAXHOSTNAMELEN); otherwise, a truncated string will be 213 * returned. On error, an empty string will be returned. 214 */ 215 boolean_t 216 smb_find_ads_server(char *fqdn, char *buf, int buflen) 217 { 218 smb_string_t server; 219 smb_string_t domain; 220 boolean_t found = B_FALSE; 221 int rc; 222 223 if (fqdn == NULL || buf == NULL) { 224 if (buf) 225 *buf = '\0'; 226 return (B_FALSE); 227 } 228 229 bzero(&server, sizeof (smb_string_t)); 230 *buf = '\0'; 231 232 domain.buf = fqdn; 233 234 rc = smb_door_call(SMB_DR_ADS_FIND_HOST, &domain, smb_string_xdr, 235 &server, smb_string_xdr); 236 237 if (rc != 0) 238 syslog(LOG_DEBUG, "smb_find_ads_server: %m"); 239 240 if (server.buf != NULL) { 241 if (*server.buf != '\0') { 242 (void) strlcpy(buf, server.buf, buflen); 243 found = B_TRUE; 244 } 245 246 xdr_free(smb_string_xdr, (char *)&server); 247 } 248 249 return (found); 250 } 251 252 /* 253 * After a successful door call the local door_arg->data_ptr is assigned 254 * to the caller's arg->rbuf so that arg has references to both input and 255 * response buffers, which is required by smb_door_free. 256 * 257 * On success, the object referenced by rsp_data will have been populated 258 * by passing rbuf through the rsp_xdr function. 259 */ 260 static int 261 smb_door_call(uint32_t cmd, void *req_data, xdrproc_t req_xdr, 262 void *rsp_data, xdrproc_t rsp_xdr) 263 { 264 smb_doorarg_t da; 265 int fd; 266 int rc; 267 char *door_name; 268 269 bzero(&da, sizeof (smb_doorarg_t)); 270 da.da_opcode = cmd; 271 da.da_opname = smb_doorhdr_opname(cmd); 272 da.da_req_xdr = req_xdr; 273 da.da_rsp_xdr = rsp_xdr; 274 da.da_req_data = req_data; 275 da.da_rsp_data = rsp_data; 276 277 if ((req_data == NULL && req_xdr != NULL) || 278 (rsp_data == NULL && rsp_xdr != NULL)) { 279 errno = EINVAL; 280 syslog(LOG_DEBUG, "smb_door_call[%s]: %m", da.da_opname); 281 return (-1); 282 } 283 284 door_name = getenv("SMBD_DOOR_NAME"); 285 if (door_name == NULL) 286 door_name = SMBD_DOOR_NAME; 287 288 if ((fd = open(door_name, O_RDONLY)) < 0) { 289 syslog(LOG_DEBUG, "smb_door_call[%s]: %m", da.da_opname); 290 return (-1); 291 } 292 293 if (smb_door_encode(&da, cmd) != 0) { 294 syslog(LOG_DEBUG, "smb_door_call[%s]: %m", da.da_opname); 295 (void) close(fd); 296 return (-1); 297 } 298 299 if (smb_door_call_private(fd, &da) != 0) { 300 syslog(LOG_DEBUG, "smb_door_call[%s]: %m", da.da_opname); 301 smb_door_free(&da.da_arg); 302 (void) close(fd); 303 return (-1); 304 } 305 306 if ((rc = smb_door_decode(&da)) != 0) 307 syslog(LOG_DEBUG, "smb_door_call[%s]: %m", da.da_opname); 308 smb_door_free(&da.da_arg); 309 (void) close(fd); 310 return (rc); 311 } 312 313 /* 314 * We use a copy of the door arg because doorfs may change data_ptr 315 * and we want to detect that when freeing the door buffers. After 316 * this call, response data must be referenced via rbuf and rsize. 317 */ 318 static int 319 smb_door_call_private(int fd, smb_doorarg_t *da) 320 { 321 door_arg_t door_arg; 322 int rc; 323 int i; 324 325 bcopy(&da->da_arg, &door_arg, sizeof (door_arg_t)); 326 327 for (i = 0; i < SMB_DOOR_CALL_RETRIES; ++i) { 328 errno = 0; 329 330 if ((rc = door_call(fd, &door_arg)) == 0) 331 break; 332 333 if (errno != EAGAIN && errno != EINTR) 334 return (-1); 335 } 336 337 if (rc != 0 || door_arg.data_size == 0 || door_arg.rsize == 0) { 338 if (errno == 0) 339 errno = EIO; 340 return (-1); 341 } 342 343 da->da_arg.rbuf = door_arg.data_ptr; 344 da->da_arg.rsize = door_arg.rsize; 345 return (rc); 346 } 347 348 static int 349 smb_door_encode(smb_doorarg_t *da, uint32_t cmd) 350 { 351 XDR xdrs; 352 char *buf; 353 uint32_t buflen; 354 355 buflen = xdr_sizeof(smb_doorhdr_xdr, &da->da_hdr); 356 if (da->da_req_xdr != NULL) 357 buflen += xdr_sizeof(da->da_req_xdr, da->da_req_data); 358 359 smb_door_sethdr(&da->da_hdr, cmd, buflen); 360 361 if ((buf = malloc(buflen)) == NULL) 362 return (-1); 363 364 xdrmem_create(&xdrs, buf, buflen, XDR_ENCODE); 365 366 if (!smb_doorhdr_xdr(&xdrs, &da->da_hdr)) { 367 errno = EPROTO; 368 free(buf); 369 xdr_destroy(&xdrs); 370 return (-1); 371 } 372 373 if (da->da_req_xdr != NULL) { 374 if (!da->da_req_xdr(&xdrs, da->da_req_data)) { 375 errno = EPROTO; 376 free(buf); 377 xdr_destroy(&xdrs); 378 return (-1); 379 } 380 } 381 382 da->da_arg.data_ptr = buf; 383 da->da_arg.data_size = buflen; 384 da->da_arg.desc_ptr = NULL; 385 da->da_arg.desc_num = 0; 386 da->da_arg.rbuf = buf; 387 da->da_arg.rsize = buflen; 388 389 xdr_destroy(&xdrs); 390 return (0); 391 } 392 393 /* 394 * Decode the response in rbuf and rsize. 395 */ 396 static int 397 smb_door_decode(smb_doorarg_t *da) 398 { 399 XDR xdrs; 400 smb_doorhdr_t hdr; 401 char *rbuf = da->da_arg.rbuf; 402 uint32_t rsize = da->da_arg.rsize; 403 404 if (rbuf == NULL || rsize == 0) { 405 errno = EINVAL; 406 return (-1); 407 } 408 409 xdrmem_create(&xdrs, rbuf, rsize, XDR_DECODE); 410 411 if (!smb_doorhdr_xdr(&xdrs, &hdr)) { 412 errno = EPROTO; 413 xdr_destroy(&xdrs); 414 return (-1); 415 } 416 417 if (!smb_door_chkhdr(da, &hdr)) { 418 errno = EPROTO; 419 xdr_destroy(&xdrs); 420 return (-1); 421 } 422 423 if (da->da_rsp_xdr != NULL) { 424 if (!da->da_rsp_xdr(&xdrs, da->da_rsp_data)) { 425 errno = EPROTO; 426 xdr_destroy(&xdrs); 427 return (-1); 428 } 429 } 430 431 xdr_destroy(&xdrs); 432 return (0); 433 } 434 435 static void 436 smb_door_sethdr(smb_doorhdr_t *hdr, uint32_t cmd, uint32_t datalen) 437 { 438 bzero(hdr, sizeof (smb_doorhdr_t)); 439 hdr->dh_magic = SMB_DOOR_HDR_MAGIC; 440 hdr->dh_flags = SMB_DF_USERSPACE; 441 hdr->dh_op = cmd; 442 hdr->dh_txid = smb_get_txid(); 443 hdr->dh_datalen = datalen; 444 hdr->dh_door_rc = SMB_DOP_NOT_CALLED; 445 } 446 447 static boolean_t 448 smb_door_chkhdr(smb_doorarg_t *da, smb_doorhdr_t *hdr) 449 { 450 if ((hdr->dh_magic != SMB_DOOR_HDR_MAGIC) || 451 (hdr->dh_op != da->da_hdr.dh_op) || 452 (hdr->dh_txid != da->da_hdr.dh_txid)) { 453 syslog(LOG_DEBUG, "smb_door_chkhdr[%s]: invalid header", 454 da->da_opname); 455 return (B_FALSE); 456 } 457 458 if (hdr->dh_door_rc != SMB_DOP_SUCCESS) { 459 syslog(LOG_DEBUG, "smb_door_chkhdr[%s]: call status=%d", 460 da->da_opname, hdr->dh_door_rc); 461 return (B_FALSE); 462 } 463 464 return (B_TRUE); 465 } 466 467 /* 468 * Free resources allocated for a door call. If the result buffer provided 469 * by the client is too small, doorfs will have allocated a new buffer, 470 * which must be unmapped here. 471 * 472 * This function must be called to free both the argument and result door 473 * buffers regardless of the status of the door call. 474 */ 475 static void 476 smb_door_free(door_arg_t *arg) 477 { 478 if (arg->rbuf && (arg->rbuf != arg->data_ptr)) 479 (void) munmap(arg->rbuf, arg->rsize); 480 481 free(arg->data_ptr); 482 } 483