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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * LanMan share door server 30 */ 31 32 #include <door.h> 33 #include <unistd.h> 34 #include <sys/types.h> 35 #include <sys/stat.h> 36 #include <fcntl.h> 37 #include <errno.h> 38 #include <syslog.h> 39 #include <string.h> 40 #include <strings.h> 41 #include <pthread.h> 42 43 #include <smbsrv/libsmb.h> 44 45 #include <smbsrv/smb_share.h> 46 #include <smbsrv/smbinfo.h> 47 48 #define SMB_SHARE_DSRV_VERSION 1 49 #define SMB_SHARE_DSRV_COOKIE ((void*)(0xdeadbeef^SMB_SHARE_DSRV_VERSION)) 50 51 static int smb_share_dsrv_fd = -1; 52 static pthread_mutex_t smb_share_dsrv_mtx = PTHREAD_MUTEX_INITIALIZER; 53 54 static void smb_share_dsrv_dispatch(void *, char *, size_t, door_desc_t *, 55 uint_t); 56 static int smb_share_dsrv_enum(smb_enumshare_info_t *esi); 57 58 /* 59 * smb_share_dsrv_start 60 * 61 * Start the LanMan share door service. 62 * Returns 0 on success. Otherwise, -1. 63 */ 64 int 65 smb_share_dsrv_start(void) 66 { 67 int newfd; 68 69 (void) pthread_mutex_lock(&smb_share_dsrv_mtx); 70 71 if (smb_share_dsrv_fd != -1) { 72 syslog(LOG_ERR, "smb_share_dsrv_start: duplicate"); 73 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx); 74 return (smb_share_dsrv_fd); 75 } 76 77 if ((smb_share_dsrv_fd = door_create(smb_share_dsrv_dispatch, 78 SMB_SHARE_DSRV_COOKIE, (DOOR_UNREF | DOOR_REFUSE_DESC))) < 0) { 79 syslog(LOG_ERR, "smb_share_dsrv_start: door_create: %s", 80 strerror(errno)); 81 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx); 82 return (-1); 83 } 84 85 (void) unlink(SMB_SHARE_DNAME); 86 87 if ((newfd = creat(SMB_SHARE_DNAME, 0644)) < 0) { 88 syslog(LOG_ERR, "smb_share_dsrv_start: open: %s", 89 strerror(errno)); 90 (void) door_revoke(smb_share_dsrv_fd); 91 smb_share_dsrv_fd = -1; 92 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx); 93 return (-1); 94 } 95 96 (void) close(newfd); 97 (void) fdetach(SMB_SHARE_DNAME); 98 99 if (fattach(smb_share_dsrv_fd, SMB_SHARE_DNAME) < 0) { 100 syslog(LOG_ERR, "smb_share_dsrv_start: fattach: %s", 101 strerror(errno)); 102 (void) door_revoke(smb_share_dsrv_fd); 103 smb_share_dsrv_fd = -1; 104 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx); 105 return (-1); 106 } 107 108 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx); 109 return (smb_share_dsrv_fd); 110 } 111 112 /* 113 * smb_share_dsrv_stop 114 * 115 * Stop the LanMan share door service. 116 */ 117 void 118 smb_share_dsrv_stop(void) 119 { 120 (void) pthread_mutex_lock(&smb_share_dsrv_mtx); 121 122 if (smb_share_dsrv_fd != -1) { 123 (void) fdetach(SMB_SHARE_DNAME); 124 (void) door_revoke(smb_share_dsrv_fd); 125 smb_share_dsrv_fd = -1; 126 } 127 128 (void) pthread_mutex_unlock(&smb_share_dsrv_mtx); 129 } 130 131 /* 132 * smb_share_dsrv_dispatch 133 * 134 * This function with which the LMSHARE door is associated 135 * will invoke the appropriate CIFS share management function 136 * based on the request type of the door call. 137 */ 138 /*ARGSUSED*/ 139 static void 140 smb_share_dsrv_dispatch(void *cookie, char *ptr, size_t size, door_desc_t *dp, 141 uint_t n_desc) 142 { 143 uint32_t rc; 144 int req_type; 145 char buf[SMB_SHARE_DSIZE]; 146 unsigned int used; 147 smb_dr_ctx_t *dec_ctx; 148 smb_dr_ctx_t *enc_ctx; 149 unsigned int dec_status; 150 unsigned int enc_status; 151 char *sharename, *sharename2; 152 smb_share_t lmshr_info; 153 smb_shrlist_t lmshr_list; 154 smb_enumshare_info_t esi; 155 int offset; 156 157 if ((cookie != SMB_SHARE_DSRV_COOKIE) || (ptr == NULL) || 158 (size < sizeof (uint32_t))) { 159 (void) door_return(NULL, 0, NULL, 0); 160 } 161 162 dec_ctx = smb_dr_decode_start(ptr, size); 163 enc_ctx = smb_dr_encode_start(buf, sizeof (buf)); 164 req_type = smb_dr_get_uint32(dec_ctx); 165 166 switch (req_type) { 167 case SMB_SHROP_NUM_SHARES: 168 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) 169 goto decode_error; 170 171 rc = smb_shr_count(); 172 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 173 smb_dr_put_uint32(enc_ctx, rc); 174 break; 175 176 case SMB_SHROP_DELETE: 177 sharename = smb_dr_get_string(dec_ctx); 178 179 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) { 180 smb_dr_free_string(sharename); 181 goto decode_error; 182 } 183 184 rc = smb_shr_del(sharename, 0); 185 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 186 smb_dr_put_uint32(enc_ctx, rc); 187 smb_dr_free_string(sharename); 188 break; 189 190 case SMB_SHROP_RENAME: 191 sharename = smb_dr_get_string(dec_ctx); 192 sharename2 = smb_dr_get_string(dec_ctx); 193 194 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) { 195 smb_dr_free_string(sharename); 196 smb_dr_free_string(sharename2); 197 goto decode_error; 198 } 199 200 rc = smb_shr_ren(sharename, sharename2, 0); 201 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 202 smb_dr_put_uint32(enc_ctx, rc); 203 smb_dr_free_string(sharename); 204 smb_dr_free_string(sharename2); 205 break; 206 207 case SMB_SHROP_GETINFO: 208 sharename = smb_dr_get_string(dec_ctx); 209 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) { 210 smb_dr_free_string(sharename); 211 goto decode_error; 212 } 213 214 rc = smb_shr_get(sharename, &lmshr_info); 215 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 216 smb_dr_put_uint32(enc_ctx, rc); 217 smb_dr_put_share(enc_ctx, &lmshr_info); 218 smb_dr_free_string(sharename); 219 break; 220 221 case SMB_SHROP_ADD: 222 smb_dr_get_share(dec_ctx, &lmshr_info); 223 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) 224 goto decode_error; 225 226 rc = smb_shr_add(&lmshr_info, 0); 227 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 228 smb_dr_put_uint32(enc_ctx, rc); 229 smb_dr_put_share(enc_ctx, &lmshr_info); 230 break; 231 232 case SMB_SHROP_SETINFO: 233 smb_dr_get_share(dec_ctx, &lmshr_info); 234 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) 235 goto decode_error; 236 237 rc = smb_shr_set(&lmshr_info, 0); 238 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 239 smb_dr_put_uint32(enc_ctx, rc); 240 break; 241 242 case SMB_SHROP_LIST: 243 offset = smb_dr_get_int32(dec_ctx); 244 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) 245 goto decode_error; 246 247 smb_shr_list(offset, &lmshr_list); 248 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 249 smb_dr_put_shrlist(enc_ctx, &lmshr_list); 250 break; 251 252 case SMB_SHROP_ENUM: 253 esi.es_bufsize = smb_dr_get_ushort(dec_ctx); 254 esi.es_username = smb_dr_get_string(dec_ctx); 255 if ((dec_status = smb_dr_decode_finish(dec_ctx)) != 0) { 256 smb_dr_free_string(esi.es_username); 257 goto decode_error; 258 } 259 260 rc = smb_share_dsrv_enum(&esi); 261 262 smb_dr_free_string(esi.es_username); 263 264 smb_dr_put_int32(enc_ctx, SMB_SHARE_DSUCCESS); 265 smb_dr_put_uint32(enc_ctx, rc); 266 if (rc == NERR_Success) { 267 smb_dr_put_ushort(enc_ctx, esi.es_ntotal); 268 smb_dr_put_ushort(enc_ctx, esi.es_nsent); 269 smb_dr_put_ushort(enc_ctx, esi.es_datasize); 270 smb_dr_put_buf(enc_ctx, 271 (unsigned char *)esi.es_buf, esi.es_bufsize); 272 free(esi.es_buf); 273 } 274 break; 275 276 default: 277 dec_status = smb_dr_decode_finish(dec_ctx); 278 goto decode_error; 279 } 280 281 if ((enc_status = smb_dr_encode_finish(enc_ctx, &used)) != 0) { 282 enc_ctx = smb_dr_encode_start(buf, sizeof (buf)); 283 smb_dr_put_int32(enc_ctx, SMB_SHARE_DERROR); 284 smb_dr_put_uint32(enc_ctx, enc_status); 285 (void) smb_dr_encode_finish(enc_ctx, &used); 286 } 287 288 (void) door_return(buf, used, NULL, 0); 289 return; 290 291 decode_error: 292 smb_dr_put_int32(enc_ctx, SMB_SHARE_DERROR); 293 smb_dr_put_uint32(enc_ctx, dec_status); 294 (void) smb_dr_encode_finish(enc_ctx, &used); 295 (void) door_return(buf, used, NULL, 0); 296 } 297 298 /* 299 * smb_share_dsrv_enum 300 * 301 * This function builds a response for a NetShareEnum RAP request which 302 * originates from smbsrv kernel module. A response buffer is allocated 303 * with the specified size in esi->es_bufsize. List of shares is scanned 304 * twice. In the first round the total number of shares which their OEM 305 * name is shorter than 13 chars (esi->es_ntotal) and also the number of 306 * shares that fit in the given buffer are calculated. In the second 307 * round the shares data are encoded in the buffer. 308 * 309 * The data associated with each share has two parts, a fixed size part and 310 * a variable size part which is share's comment. The outline of the response 311 * buffer is so that fixed part for all the shares will appear first and follows 312 * with the comments for all those shares and that's why the data cannot be 313 * encoded in one round without unnecessarily complicating the code. 314 */ 315 static int 316 smb_share_dsrv_enum(smb_enumshare_info_t *esi) 317 { 318 smb_shriter_t shi; 319 smb_share_t *si; 320 int remained; 321 uint16_t infolen = 0; 322 uint16_t cmntlen = 0; 323 uint16_t sharelen; 324 uint16_t clen; 325 uint32_t cmnt_offs; 326 smb_msgbuf_t info_mb; 327 smb_msgbuf_t cmnt_mb; 328 boolean_t autohome_added = B_FALSE; 329 330 esi->es_ntotal = esi->es_nsent = 0; 331 332 if ((esi->es_buf = malloc(esi->es_bufsize)) == NULL) 333 return (NERR_InternalError); 334 335 bzero(esi->es_buf, esi->es_bufsize); 336 remained = esi->es_bufsize; 337 338 /* Do the necessary calculations in the first round */ 339 smb_shr_iterinit(&shi, SMB_SHRF_ALL); 340 341 while ((si = smb_shr_iterate(&shi)) != NULL) { 342 if (si->shr_flags & SMB_SHRF_LONGNAME) 343 continue; 344 345 if ((si->shr_flags & SMB_SHRF_AUTOHOME) && !autohome_added) { 346 if (strcasecmp(esi->es_username, si->shr_name) == 0) 347 autohome_added = B_TRUE; 348 else 349 continue; 350 } 351 352 esi->es_ntotal++; 353 354 if (remained <= 0) 355 continue; 356 357 clen = strlen(si->shr_cmnt) + 1; 358 sharelen = SHARE_INFO_1_SIZE + clen; 359 360 if (sharelen <= remained) { 361 infolen += SHARE_INFO_1_SIZE; 362 cmntlen += clen; 363 } 364 365 remained -= sharelen; 366 } 367 368 esi->es_datasize = infolen + cmntlen; 369 370 smb_msgbuf_init(&info_mb, (uint8_t *)esi->es_buf, infolen, 0); 371 smb_msgbuf_init(&cmnt_mb, (uint8_t *)esi->es_buf + infolen, cmntlen, 0); 372 cmnt_offs = infolen; 373 374 /* Encode the data in the second round */ 375 smb_shr_iterinit(&shi, SMB_SHRF_ALL); 376 autohome_added = B_FALSE; 377 378 while ((si = smb_shr_iterate(&shi)) != NULL) { 379 if (si->shr_flags & SMB_SHRF_LONGNAME) 380 continue; 381 382 if ((si->shr_flags & SMB_SHRF_AUTOHOME) && !autohome_added) { 383 if (strcasecmp(esi->es_username, si->shr_name) == 0) 384 autohome_added = B_TRUE; 385 else 386 continue; 387 } 388 389 if (smb_msgbuf_encode(&info_mb, "13c.wl", 390 si->shr_oemname, si->shr_type, cmnt_offs) < 0) 391 break; 392 393 if (smb_msgbuf_encode(&cmnt_mb, "s", si->shr_cmnt) < 0) 394 break; 395 396 cmnt_offs += strlen(si->shr_cmnt) + 1; 397 esi->es_nsent++; 398 } 399 400 smb_msgbuf_term(&info_mb); 401 smb_msgbuf_term(&cmnt_mb); 402 403 return (NERR_Success); 404 } 405