1 /* 2 * Copyright (c) 2000, Boris Popov 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Boris Popov. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: rq.c,v 1.4 2004/12/13 00:25:23 lindak Exp $ 33 */ 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/ioctl.h> 38 #include <sys/errno.h> 39 #include <sys/stat.h> 40 41 #include <ctype.h> 42 #include <errno.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include <strings.h> 46 #include <stdlib.h> 47 #include <sysexits.h> 48 #include <libintl.h> 49 50 #include <netsmb/smb.h> 51 #include <netsmb/smb_lib.h> 52 #include "private.h" 53 54 #define MIN_REPLY_SIZE 4096 55 56 static uint32_t smb_map_doserr(uint8_t, uint16_t); 57 58 /* 59 * Create and initialize a request structure, for either an 60 * "internal" request (one that does not use the driver) or 61 * a regular "driver" request, that uses driver ioctls. 62 * 63 * The two kinds are built a little differently: 64 * Driver requests are composed starting with the 65 * first word of the "variable word vector" section. 66 * The driver prepends the SMB header and word count. 67 * The driver also needs an output buffer to receive 68 * the response, filled in via copyout in the ioctl. 69 * 70 * Internal requests are composed entirely in this library. 71 * Space for the SMB header is reserved here, and later 72 * filled in by smb_rq_internal before the send/receive. 73 */ 74 int 75 smb_rq_init(struct smb_ctx *ctx, uchar_t cmd, struct smb_rq **rqpp) 76 { 77 struct smb_rq *rqp; 78 79 rqp = malloc(sizeof (*rqp)); 80 if (rqp == NULL) 81 goto errout; 82 bzero(rqp, sizeof (*rqp)); 83 rqp->rq_cmd = cmd; 84 rqp->rq_ctx = ctx; 85 86 /* 87 * Setup the request buffer. 88 * Do the reply buffer later. 89 */ 90 if (mb_init(&rqp->rq_rq)) 91 goto errout; 92 93 /* Space for the SMB header. (filled in later) */ 94 mb_put_mem(&rqp->rq_rq, NULL, SMB_HDRLEN, MB_MSYSTEM); 95 96 /* 97 * Copy the ctx flags here, so the caller can 98 * update the req flags before the OTW call. 99 */ 100 rqp->rq_hflags = ctx->ct_hflags; 101 rqp->rq_hflags2 = ctx->ct_hflags2; 102 103 *rqpp = rqp; 104 return (0); 105 106 errout: 107 if (rqp) { 108 smb_rq_done(rqp); 109 free(rqp); 110 } 111 return (ENOMEM); 112 } 113 114 void 115 smb_rq_done(struct smb_rq *rqp) 116 { 117 mb_done(&rqp->rq_rp); 118 mb_done(&rqp->rq_rq); 119 free(rqp); 120 } 121 122 /* 123 * Reserve space for the word count, which is filled in later by 124 * smb_rq_wend(). Also initialize the counter that it uses 125 * to figure out what value to fill in. 126 * 127 * Note that the word count happens to be 8-bits, 128 * which can lead to confusion. 129 */ 130 void 131 smb_rq_wstart(struct smb_rq *rqp) 132 { 133 struct mbdata *mbp = &rqp->rq_rq; 134 135 (void) mb_fit(mbp, 1, &rqp->rq_wcntp); 136 rqp->rq_wcbase = mbp->mb_count; 137 } 138 139 /* 140 * Fill in the word count, in the space reserved by 141 * smb_rq_wstart(). 142 */ 143 void 144 smb_rq_wend(struct smb_rq *rqp) 145 { 146 struct mbdata *mbp = &rqp->rq_rq; 147 int wcnt; 148 149 if (rqp->rq_wcntp == NULL) { 150 DPRINT("no wcount ptr\n"); 151 return; 152 } 153 wcnt = mbp->mb_count - rqp->rq_wcbase; 154 if (wcnt > 0x1ff) 155 DPRINT("word count too large (%d)\n", wcnt); 156 if (wcnt & 1) 157 DPRINT("odd word count\n"); 158 wcnt >>= 1; 159 160 /* 161 * Fill in the word count (8-bits). 162 * Also store it in the rq, in case 163 * we're using the ioctl path. 164 */ 165 *rqp->rq_wcntp = (char)wcnt; 166 } 167 168 /* 169 * Reserve space for the byte count, which is filled in later by 170 * smb_rq_bend(). Also initialize the counter that it uses 171 * to figure out what value to fill in. 172 * 173 * Note that the byte count happens to be 16-bits, 174 * which can lead to confusion. 175 */ 176 void 177 smb_rq_bstart(struct smb_rq *rqp) 178 { 179 struct mbdata *mbp = &rqp->rq_rq; 180 181 (void) mb_fit(mbp, 2, &rqp->rq_bcntp); 182 rqp->rq_bcbase = mbp->mb_count; 183 } 184 185 /* 186 * Fill in the byte count, in the space reserved by 187 * smb_rq_bstart(). 188 */ 189 void 190 smb_rq_bend(struct smb_rq *rqp) 191 { 192 struct mbdata *mbp = &rqp->rq_rq; 193 int bcnt; 194 195 if (rqp->rq_bcntp == NULL) { 196 DPRINT("no bcount ptr\n"); 197 return; 198 } 199 bcnt = mbp->mb_count - rqp->rq_bcbase; 200 if (bcnt > 0xffff) 201 DPRINT("byte count too large (%d)\n", bcnt); 202 /* 203 * Fill in the byte count (16-bits). 204 * Also store it in the rq, in case 205 * we're using the ioctl path. 206 * 207 * The pointer is char * type due to 208 * typical off-by-one alignment. 209 */ 210 rqp->rq_bcntp[0] = bcnt & 0xFF; 211 rqp->rq_bcntp[1] = (bcnt >> 8); 212 } 213 214 int 215 smb_rq_simple(struct smb_rq *rqp) 216 { 217 struct smbioc_rq krq; 218 struct mbdata *mbp; 219 mbuf_t *m; 220 char *data; 221 uint32_t len; 222 size_t rpbufsz; 223 int error; 224 225 bzero(&krq, sizeof (krq)); 226 krq.ioc_cmd = rqp->rq_cmd; 227 228 /* 229 * Make the SMB request body contiguous, 230 * and fill in the ioctl request. 231 */ 232 mbp = smb_rq_getrequest(rqp); 233 error = m_lineup(mbp->mb_top, &mbp->mb_top); 234 if (error) 235 return (error); 236 237 data = mtod(mbp->mb_top, char *); 238 len = m_totlen(mbp->mb_top); 239 240 /* 241 * _rq_init left space for the SMB header, 242 * which makes mb_count the offset from 243 * the beginning of the header (useful). 244 * However, in this code path the driver 245 * prepends the header, so we skip it. 246 */ 247 krq.ioc_tbufsz = len - SMB_HDRLEN; 248 krq.ioc_tbuf = data + SMB_HDRLEN; 249 250 /* 251 * Setup a buffer to hold the reply, 252 * at least MIN_REPLY_SIZE, or larger 253 * if the caller increased rq_rpbufsz. 254 */ 255 mbp = smb_rq_getreply(rqp); 256 rpbufsz = rqp->rq_rpbufsz; 257 if (rpbufsz < MIN_REPLY_SIZE) 258 rpbufsz = MIN_REPLY_SIZE; 259 if ((error = m_get(rpbufsz, &m)) != 0) 260 return (error); 261 mb_initm(mbp, m); 262 krq.ioc_rbufsz = rpbufsz; 263 krq.ioc_rbuf = mtod(m, char *); 264 265 /* 266 * Call the driver 267 */ 268 if (ioctl(rqp->rq_ctx->ct_dev_fd, SMBIOC_REQUEST, &krq) == -1) 269 return (errno); 270 271 /* 272 * Initialize returned mbdata. 273 * SMB header already parsed. 274 */ 275 m->m_len = krq.ioc_rbufsz; 276 277 return (0); 278 } 279 280 281 int 282 smb_t2_request(struct smb_ctx *ctx, int setupcount, uint16_t *setup, 283 const char *name, 284 int tparamcnt, void *tparam, 285 int tdatacnt, void *tdata, 286 int *rparamcnt, void *rparam, 287 int *rdatacnt, void *rdata, 288 int *buffer_oflow) 289 { 290 smbioc_t2rq_t *krq; 291 int i; 292 293 krq = (smbioc_t2rq_t *)malloc(sizeof (smbioc_t2rq_t)); 294 bzero(krq, sizeof (*krq)); 295 296 if (setupcount < 0 || setupcount >= SMBIOC_T2RQ_MAXSETUP) { 297 /* Bogus setup count, or too many setup words */ 298 return (EINVAL); 299 } 300 for (i = 0; i < setupcount; i++) 301 krq->ioc_setup[i] = setup[i]; 302 krq->ioc_setupcnt = setupcount; 303 strcpy(krq->ioc_name, name); 304 krq->ioc_tparamcnt = tparamcnt; 305 krq->ioc_tparam = tparam; 306 krq->ioc_tdatacnt = tdatacnt; 307 krq->ioc_tdata = tdata; 308 309 krq->ioc_rparamcnt = *rparamcnt; 310 krq->ioc_rdatacnt = *rdatacnt; 311 krq->ioc_rparam = rparam; 312 krq->ioc_rdata = rdata; 313 314 if (ioctl(ctx->ct_dev_fd, SMBIOC_T2RQ, krq) == -1) { 315 return (errno); 316 } 317 318 *rparamcnt = krq->ioc_rparamcnt; 319 *rdatacnt = krq->ioc_rdatacnt; 320 *buffer_oflow = (krq->ioc_rpflags2 & SMB_FLAGS2_ERR_STATUS) && 321 (krq->ioc_error == NT_STATUS_BUFFER_OVERFLOW); 322 free(krq); 323 324 return (0); 325 } 326 327 328 /* 329 * Do an over-the-wire call without using the nsmb driver. 330 * This is all "internal" to this library, and used only 331 * for connection setup (negotiate protocol, etc.) 332 */ 333 int 334 smb_rq_internal(struct smb_ctx *ctx, struct smb_rq *rqp) 335 { 336 static const uint8_t ffsmb[4] = SMB_SIGNATURE; 337 struct smb_iods *is = &ctx->ct_iods; 338 uint32_t sigbuf[2]; 339 struct mbdata mbtmp, *mbp; 340 int err, save_mlen; 341 uint8_t ctmp; 342 343 rqp->rq_uid = is->is_smbuid; 344 rqp->rq_tid = SMB_TID_UNKNOWN; 345 rqp->rq_mid = is->is_next_mid++; 346 347 /* 348 * Fill in the NBT and SMB headers 349 * Using mbtmp so we can rewind without 350 * affecting the passed request mbdata. 351 */ 352 bcopy(&rqp->rq_rq, &mbtmp, sizeof (mbtmp)); 353 mbp = &mbtmp; 354 mbp->mb_cur = mbp->mb_top; 355 mbp->mb_pos = mbp->mb_cur->m_data; 356 mbp->mb_count = 0; 357 /* Have to save and restore m_len */ 358 save_mlen = mbp->mb_cur->m_len; 359 mbp->mb_cur->m_len = 0; 360 361 /* 362 * rewind done; fill it in 363 */ 364 mb_put_mem(mbp, ffsmb, SMB_SIGLEN, MB_MSYSTEM); 365 mb_put_uint8(mbp, rqp->rq_cmd); 366 mb_put_uint32le(mbp, 0); /* status */ 367 mb_put_uint8(mbp, rqp->rq_hflags); 368 mb_put_uint16le(mbp, rqp->rq_hflags2); 369 /* pid_hi(2), signature(8), reserved(2) */ 370 mb_put_mem(mbp, NULL, 12, MB_MZERO); 371 mb_put_uint16le(mbp, rqp->rq_tid); 372 mb_put_uint16le(mbp, 0); /* pid_lo */ 373 mb_put_uint16le(mbp, rqp->rq_uid); 374 mb_put_uint16le(mbp, rqp->rq_mid); 375 376 /* Restore original m_len */ 377 mbp->mb_cur->m_len = save_mlen; 378 379 /* 380 * Sign the message, if flags2 indicates. 381 */ 382 if (rqp->rq_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE) { 383 smb_rq_sign(rqp); 384 } 385 386 /* 387 * Send it, wait for the reply. 388 */ 389 if ((err = smb_ssn_send(ctx, &rqp->rq_rq)) != 0) 390 return (err); 391 392 if ((err = smb_ssn_recv(ctx, &rqp->rq_rp)) != 0) 393 return (err); 394 395 /* 396 * Should have an SMB header, at least. 397 */ 398 mbp = &rqp->rq_rp; 399 if (mbp->mb_cur->m_len < SMB_HDRLEN) { 400 DPRINT("len < 32"); 401 return (EBADRPC); 402 } 403 404 /* 405 * If the request was signed, validate the 406 * signature on the response. 407 */ 408 if (rqp->rq_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE) { 409 err = smb_rq_verify(rqp); 410 if (err) { 411 DPRINT("bad signature"); 412 return (err); 413 } 414 } 415 416 /* 417 * Decode the SMB header. 418 */ 419 md_get_mem(mbp, (char *)sigbuf, 4, MB_MSYSTEM); 420 if (0 != bcmp(sigbuf, ffsmb, 4)) { 421 DPRINT("not SMB"); 422 return (EBADRPC); 423 } 424 md_get_uint8(mbp, &ctmp); /* SMB cmd */ 425 md_get_uint32le(mbp, &rqp->rq_status); 426 md_get_uint8(mbp, &rqp->rq_hflags); 427 md_get_uint16le(mbp, &rqp->rq_hflags2); 428 /* pid_hi(2), signature(8), reserved(2) */ 429 md_get_mem(mbp, NULL, 12, MB_MSYSTEM); 430 md_get_uint16le(mbp, &rqp->rq_tid); 431 md_get_uint16le(mbp, NULL); /* pid_lo */ 432 md_get_uint16le(mbp, &rqp->rq_uid); 433 md_get_uint16le(mbp, &rqp->rq_mid); 434 435 /* 436 * Figure out the status return. 437 * Caller looks at rq_status. 438 */ 439 if ((rqp->rq_hflags2 & SMB_FLAGS2_ERR_STATUS) == 0) { 440 uint16_t serr; 441 uint8_t class; 442 443 class = rqp->rq_status & 0xff; 444 serr = rqp->rq_status >> 16; 445 rqp->rq_status = smb_map_doserr(class, serr); 446 } 447 448 return (0); 449 } 450 451 /* 452 * Map old DOS errors (etc.) to NT status codes. 453 * We probably don't need this anymore, since 454 * the oldest server we talk to is NT. But if 455 * later find we do need this, add support here 456 * for the DOS errors we care about. 457 */ 458 static uint32_t 459 smb_map_doserr(uint8_t class, uint16_t serr) 460 { 461 if (class == 0 && serr == 0) 462 return (0); 463 464 DPRINT("class 0x%x serr 0x%x", (int)class, (int)serr); 465 return (NT_STATUS_UNSUCCESSFUL); 466 } 467