source3/libsmb/cliconnect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client connect/disconnect routines
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Andrew Bartlett 2001-2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22
  23 static const struct {
  24         int prot;
  25         const char *name;
  26 } prots[] = {
  27         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  28         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  29         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  30         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  31         {PROTOCOL_LANMAN2,"LM1.2X002"},
  32         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  33         {PROTOCOL_LANMAN2,"LANMAN2.1"},
  34         {PROTOCOL_LANMAN2,"Samba"},
  35         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  36         {PROTOCOL_NT1,"NT LM 0.12"},
  37         {-1,NULL}
  38 };
  39
  40 static const char *star_smbserver_name = "*SMBSERVER";
  41
  42 /**
  43  * Set the user session key for a connection
  44  * @param cli The cli structure to add it too
  45  * @param session_key The session key used.  (A copy of this is taken for the cli struct)
  46  *
  47  */
  48
  49 static void cli_set_session_key (struct cli_state *cli, const DATA_BLOB session_key)
  50 {
  51         cli->user_session_key = data_blob(session_key.data, session_key.length);
  52 }
  53
  54 /****************************************************************************
  55  Do an old lanman2 style session setup.
  56 ****************************************************************************/
  57
  58 static NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
  59                                           const char *user,
  60                                           const char *pass, size_t passlen,
  61                                           const char *workgroup)
  62 {
  63         DATA_BLOB session_key = data_blob_null;
  64         DATA_BLOB lm_response = data_blob_null;
  65         fstring pword;
  66         char *p;
  67
  68         if (passlen > sizeof(pword)-1) {
  69                 return NT_STATUS_INVALID_PARAMETER;
  70         }
  71
  72         /* LANMAN servers predate NT status codes and Unicode and ignore those
  73            smb flags so we must disable the corresponding default capabilities
  74            that would otherwise cause the Unicode and NT Status flags to be
  75            set (and even returned by the server) */
  76
  77         cli->capabilities &= ~(CAP_UNICODE | CAP_STATUS32);
  78
  79         /* if in share level security then don't send a password now */
  80         if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
  81                 passlen = 0;
  82
  83         if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
  84                 /* Encrypted mode needed, and non encrypted password supplied. */
  85                 lm_response = data_blob(NULL, 24);
  86                 if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
  87                         DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
  88                         return NT_STATUS_ACCESS_DENIED;
  89                 }
  90         } else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
  91                 /* Encrypted mode needed, and encrypted password supplied. */
  92                 lm_response = data_blob(pass, passlen);
  93         } else if (passlen > 0) {
  94                 /* Plaintext mode needed, assume plaintext supplied. */
  95                 passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
  96                 lm_response = data_blob(pass, passlen);
  97         }
  98
  99         /* send a session setup command */
 100         memset(cli->outbuf,'\0',smb_size);
 101         cli_set_message(cli->outbuf,10, 0, True);
 102         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 103         cli_setup_packet(cli);
 104
 105         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 106         SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
 107         SSVAL(cli->outbuf,smb_vwv3,2);
 108         SSVAL(cli->outbuf,smb_vwv4,1);
 109         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 110         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 111
 112         p = smb_buf(cli->outbuf);
 113         memcpy(p,lm_response.data,lm_response.length);
 114         p += lm_response.length;
 115         p += clistr_push(cli, p, user, -1, STR_TERMINATE|STR_UPPER);
 116         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 117         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 118         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 119         cli_setup_bcc(cli, p);
 120
 121         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 122                 return cli_nt_error(cli);
 123         }
 124
 125         show_msg(cli->inbuf);
 126
 127         if (cli_is_error(cli)) {
 128                 return cli_nt_error(cli);
 129         }
 130
 131         /* use the returned vuid from now on */
 132         cli->vuid = SVAL(cli->inbuf,smb_uid);
 133         fstrcpy(cli->user_name, user);
 134
 135         if (session_key.data) {
 136                 /* Have plaintext orginal */
 137                 cli_set_session_key(cli, session_key);
 138         }
 139
 140         return NT_STATUS_OK;
 141 }
 142
 143 /****************************************************************************
 144  Work out suitable capabilities to offer the server.
 145 ****************************************************************************/
 146
 147 static uint32 cli_session_setup_capabilities(struct cli_state *cli)
 148 {
 149         uint32 capabilities = CAP_NT_SMBS;
 150
 151         if (!cli->force_dos_errors)
 152                 capabilities |= CAP_STATUS32;
 153
 154         if (cli->use_level_II_oplocks)
 155                 capabilities |= CAP_LEVEL_II_OPLOCKS;
 156
 157         capabilities |= (cli->capabilities & (CAP_UNICODE|CAP_LARGE_FILES|CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_DFS));
 158         return capabilities;
 159 }
 160
 161 /****************************************************************************
 162  Do a NT1 guest session setup.
 163 ****************************************************************************/
 164
 165 static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
 166 {
 167         char *p;
 168         uint32 capabilities = cli_session_setup_capabilities(cli);
 169
 170         memset(cli->outbuf, '\0', smb_size);
 171         cli_set_message(cli->outbuf,13,0,True);
 172         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 173         cli_setup_packet(cli);
 174
 175         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 176         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 177         SSVAL(cli->outbuf,smb_vwv3,2);
 178         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 179         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 180         SSVAL(cli->outbuf,smb_vwv7,0);
 181         SSVAL(cli->outbuf,smb_vwv8,0);
 182         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 183         p = smb_buf(cli->outbuf);
 184         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
 185         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
 186         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 187         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 188         cli_setup_bcc(cli, p);
 189
 190         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 191                 return cli_nt_error(cli);
 192         }
 193
 194         show_msg(cli->inbuf);
 195
 196         if (cli_is_error(cli)) {
 197                 return cli_nt_error(cli);
 198         }
 199
 200         cli->vuid = SVAL(cli->inbuf,smb_uid);
 201
 202         p = smb_buf(cli->inbuf);
 203         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 204         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 205         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 206
 207         if (strstr(cli->server_type, "Samba")) {
 208                 cli->is_samba = True;
 209         }
 210
 211         fstrcpy(cli->user_name, "");
 212
 213         return NT_STATUS_OK;
 214 }
 215
 216 /****************************************************************************
 217  Do a NT1 plaintext session setup.
 218 ****************************************************************************/
 219
 220 static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
 221                                             const char *user, const char *pass,
 222                                             const char *workgroup)
 223 {
 224         uint32 capabilities = cli_session_setup_capabilities(cli);
 225         char *p;
 226         fstring lanman;
 227
 228         fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 229
 230         memset(cli->outbuf, '\0', smb_size);
 231         cli_set_message(cli->outbuf,13,0,True);
 232         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 233         cli_setup_packet(cli);
 234
 235         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 236         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 237         SSVAL(cli->outbuf,smb_vwv3,2);
 238         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 239         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 240         SSVAL(cli->outbuf,smb_vwv8,0);
 241         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 242         p = smb_buf(cli->outbuf);
 243
 244         /* check wether to send the ASCII or UNICODE version of the password */
 245
 246         if ( (capabilities & CAP_UNICODE) == 0 ) {
 247                 p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
 248                 SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
 249         }
 250         else {
 251                 /* For ucs2 passwords clistr_push calls ucs2_align, which causes
 252                  * the space taken by the unicode password to be one byte too
 253                  * long (as we're on an odd byte boundary here). Reduce the
 254                  * count by 1 to cope with this. Fixes smbclient against NetApp
 255                  * servers which can't cope. Fix from
 256                  * bryan.kolodziej@allenlund.com in bug #3840.
 257                  */
 258                 p += clistr_push(cli, p, pass, -1, STR_UNICODE|STR_TERMINATE); /* unicode password */
 259                 SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf))-1);
 260         }
 261
 262         p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
 263         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
 264         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 265         p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
 266         cli_setup_bcc(cli, p);
 267
 268         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 269                 return cli_nt_error(cli);
 270         }
 271
 272         show_msg(cli->inbuf);
 273
 274         if (cli_is_error(cli)) {
 275                 return cli_nt_error(cli);
 276         }
 277
 278         cli->vuid = SVAL(cli->inbuf,smb_uid);
 279         p = smb_buf(cli->inbuf);
 280         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 281         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 282         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 283         fstrcpy(cli->user_name, user);
 284
 285         if (strstr(cli->server_type, "Samba")) {
 286                 cli->is_samba = True;
 287         }
 288
 289         return NT_STATUS_OK;
 290 }
 291
 292 /****************************************************************************
 293    do a NT1 NTLM/LM encrypted session setup - for when extended security
 294    is not negotiated.
 295    @param cli client state to create do session setup on
 296    @param user username
 297    @param pass *either* cleartext password (passlen !=24) or LM response.
 298    @param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
 299    @param workgroup The user's domain.
 300 ****************************************************************************/
 301
 302 static NTSTATUS cli_session_setup_nt1(struct cli_state *cli, const char *user,
 303                                       const char *pass, size_t passlen,
 304                                       const char *ntpass, size_t ntpasslen,
 305                                       const char *workgroup)
 306 {
 307         uint32 capabilities = cli_session_setup_capabilities(cli);
 308         DATA_BLOB lm_response = data_blob_null;
 309         DATA_BLOB nt_response = data_blob_null;
 310         DATA_BLOB session_key = data_blob_null;
 311         NTSTATUS result;
 312         char *p;
 313
 314         if (passlen == 0) {
 315                 /* do nothing - guest login */
 316         } else if (passlen != 24) {
 317                 if (lp_client_ntlmv2_auth()) {
 318                         DATA_BLOB server_chal;
 319                         DATA_BLOB names_blob;
 320                         server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
 321
 322                         /* note that the 'workgroup' here is a best guess - we don't know
 323                            the server's domain at this point.  The 'server name' is also
 324                            dodgy...
 325                         */
 326                         names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
 327
 328                         if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
 329                                               &names_blob,
 330                                               &lm_response, &nt_response, &session_key)) {
 331                                 data_blob_free(&names_blob);
 332                                 data_blob_free(&server_chal);
 333                                 return NT_STATUS_ACCESS_DENIED;
 334                         }
 335                         data_blob_free(&names_blob);
 336                         data_blob_free(&server_chal);
 337
 338                 } else {
 339                         uchar nt_hash[16];
 340                         E_md4hash(pass, nt_hash);
 341
 342 #ifdef LANMAN_ONLY
 343                         nt_response = data_blob_null;
 344 #else
 345                         nt_response = data_blob(NULL, 24);
 346                         SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
 347 #endif
 348                         /* non encrypted password supplied. Ignore ntpass. */
 349                         if (lp_client_lanman_auth()) {
 350                                 lm_response = data_blob(NULL, 24);
 351                                 if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
 352                                         /* Oops, the LM response is invalid, just put
 353                                            the NT response there instead */
 354                                         data_blob_free(&lm_response);
 355                                         lm_response = data_blob(nt_response.data, nt_response.length);
 356                                 }
 357                         } else {
 358                                 /* LM disabled, place NT# in LM field instead */
 359                                 lm_response = data_blob(nt_response.data, nt_response.length);
 360                         }
 361
 362                         session_key = data_blob(NULL, 16);
 363 #ifdef LANMAN_ONLY
 364                         E_deshash(pass, session_key.data);
 365                         memset(&session_key.data[8], '\0', 8);
 366 #else
 367                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
 368 #endif
 369                 }
 370 #ifdef LANMAN_ONLY
 371                 cli_simple_set_signing(cli, session_key, lm_response);
 372 #else
 373                 cli_simple_set_signing(cli, session_key, nt_response);
 374 #endif
 375         } else {
 376                 /* pre-encrypted password supplied.  Only used for
 377                    security=server, can't do
 378                    signing because we don't have original key */
 379
 380                 lm_response = data_blob(pass, passlen);
 381                 nt_response = data_blob(ntpass, ntpasslen);
 382         }
 383
 384         /* send a session setup command */
 385         memset(cli->outbuf,'\0',smb_size);
 386
 387         cli_set_message(cli->outbuf,13,0,True);
 388         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 389         cli_setup_packet(cli);
 390
 391         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 392         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 393         SSVAL(cli->outbuf,smb_vwv3,2);
 394         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 395         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 396         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 397         SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
 398         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 399         p = smb_buf(cli->outbuf);
 400         if (lm_response.length) {
 401                 memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
 402         }
 403         if (nt_response.length) {
 404                 memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
 405         }
 406         p += clistr_push(cli, p, user, -1, STR_TERMINATE);
 407
 408         /* Upper case here might help some NTLMv2 implementations */
 409         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 410         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 411         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 412         cli_setup_bcc(cli, p);
 413
 414         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 415                 result = cli_nt_error(cli);
 416                 goto end;
 417         }
 418
 419         /* show_msg(cli->inbuf); */
 420
 421         if (cli_is_error(cli)) {
 422                 result = cli_nt_error(cli);
 423                 goto end;
 424         }
 425
 426         /* use the returned vuid from now on */
 427         cli->vuid = SVAL(cli->inbuf,smb_uid);
 428
 429         p = smb_buf(cli->inbuf);
 430         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 431         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 432         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 433
 434         if (strstr(cli->server_type, "Samba")) {
 435                 cli->is_samba = True;
 436         }
 437
 438         fstrcpy(cli->user_name, user);
 439
 440         if (session_key.data) {
 441                 /* Have plaintext orginal */
 442                 cli_set_session_key(cli, session_key);
 443         }
 444
 445         result = NT_STATUS_OK;
 446 end:
 447         data_blob_free(&lm_response);
 448         data_blob_free(&nt_response);
 449         data_blob_free(&session_key);
 450         return result;
 451 }
 452
 453 /****************************************************************************
 454  Send a extended security session setup blob
 455 ****************************************************************************/
 456
 457 static bool cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 458 {
 459         uint32 capabilities = cli_session_setup_capabilities(cli);
 460         char *p;
 461
 462         capabilities |= CAP_EXTENDED_SECURITY;
 463
 464         /* send a session setup command */
 465         memset(cli->outbuf,'\0',smb_size);
 466
 467         cli_set_message(cli->outbuf,12,0,True);
 468         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 469
 470         cli_setup_packet(cli);
 471
 472         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 473         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 474         SSVAL(cli->outbuf,smb_vwv3,2);
 475         SSVAL(cli->outbuf,smb_vwv4,1);
 476         SIVAL(cli->outbuf,smb_vwv5,0);
 477         SSVAL(cli->outbuf,smb_vwv7,blob.length);
 478         SIVAL(cli->outbuf,smb_vwv10,capabilities);
 479         p = smb_buf(cli->outbuf);
 480         memcpy(p, blob.data, blob.length);
 481         p += blob.length;
 482         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 483         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 484         cli_setup_bcc(cli, p);
 485         return cli_send_smb(cli);
 486 }
 487
 488 /****************************************************************************
 489  Send a extended security session setup blob, returning a reply blob.
 490 ****************************************************************************/
 491
 492 static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
 493 {
 494         DATA_BLOB blob2 = data_blob_null;
 495         char *p;
 496         size_t len;
 497
 498         if (!cli_receive_smb(cli))
 499                 return blob2;
 500
 501         show_msg(cli->inbuf);
 502
 503         if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
 504                                                   NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 505                 return blob2;
 506         }
 507
 508         /* use the returned vuid from now on */
 509         cli->vuid = SVAL(cli->inbuf,smb_uid);
 510
 511         p = smb_buf(cli->inbuf);
 512
 513         blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
 514
 515         p += blob2.length;
 516         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 517
 518         /* w2k with kerberos doesn't properly null terminate this field */
 519         len = smb_buflen(cli->inbuf) - PTR_DIFF(p, smb_buf(cli->inbuf));
 520         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
 521
 522         return blob2;
 523 }
 524
 525 #ifdef HAVE_KRB5
 526 /****************************************************************************
 527  Send a extended security session setup blob, returning a reply blob.
 528 ****************************************************************************/
 529
 530 /* The following is calculated from :
 531  * (smb_size-4) = 35
 532  * (smb_wcnt * 2) = 24 (smb_wcnt == 12 in cli_session_setup_blob_send() )
 533  * (strlen("Unix") + 1 + strlen("Samba") + 1) * 2 = 22 (unicode strings at
 534  * end of packet.
 535  */
 536
 537 #define BASE_SESSSETUP_BLOB_PACKET_SIZE (35 + 24 + 22)
 538
 539 static bool cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob, DATA_BLOB session_key_krb5)
 540 {
 541         int32 remaining = blob.length;
 542         int32 cur = 0;
 543         DATA_BLOB send_blob = data_blob_null;
 544         int32 max_blob_size = 0;
 545         DATA_BLOB receive_blob = data_blob_null;
 546
 547         if (cli->max_xmit < BASE_SESSSETUP_BLOB_PACKET_SIZE + 1) {
 548                 DEBUG(0,("cli_session_setup_blob: cli->max_xmit too small "
 549                         "(was %u, need minimum %u)\n",
 550                         (unsigned int)cli->max_xmit,
 551                         BASE_SESSSETUP_BLOB_PACKET_SIZE));
 552                 cli_set_nt_error(cli, NT_STATUS_INVALID_PARAMETER);
 553                 return False;
 554         }
 555
 556         max_blob_size = cli->max_xmit - BASE_SESSSETUP_BLOB_PACKET_SIZE;
 557
 558         while ( remaining > 0) {
 559                 if (remaining >= max_blob_size) {
 560                         send_blob.length = max_blob_size;
 561                         remaining -= max_blob_size;
 562                 } else {
 563                         DATA_BLOB null_blob = data_blob_null;
 564
 565                         send_blob.length = remaining;
 566                         remaining = 0;
 567
 568                         /* This is the last packet in the sequence - turn signing on. */
 569                         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 570                 }
 571
 572                 send_blob.data =  &blob.data[cur];
 573                 cur += send_blob.length;
 574
 575                 DEBUG(10, ("cli_session_setup_blob: Remaining (%u) sending (%u) current (%u)\n",
 576                         (unsigned int)remaining,
 577                         (unsigned int)send_blob.length,
 578                         (unsigned int)cur ));
 579
 580                 if (!cli_session_setup_blob_send(cli, send_blob)) {
 581                         DEBUG(0, ("cli_session_setup_blob: send failed\n"));
 582                         return False;
 583                 }
 584
 585                 receive_blob = cli_session_setup_blob_receive(cli);
 586                 data_blob_free(&receive_blob);
 587
 588                 if (cli_is_error(cli) &&
 589                                 !NT_STATUS_EQUAL( cli_get_nt_error(cli),
 590                                         NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 591                         DEBUG(0, ("cli_session_setup_blob: receive failed "
 592                                   "(%s)\n", nt_errstr(cli_get_nt_error(cli))));
 593                         cli->vuid = 0;
 594                         return False;
 595                 }
 596         }
 597
 598         return True;
 599 }
 600
 601 /****************************************************************************
 602  Use in-memory credentials cache
 603 ****************************************************************************/
 604
 605 static void use_in_memory_ccache(void) {
 606         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 607 }
 608
 609 /****************************************************************************
 610  Do a spnego/kerberos encrypted session setup.
 611 ****************************************************************************/
 612
 613 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 614 {
 615         DATA_BLOB negTokenTarg;
 616         DATA_BLOB session_key_krb5;
 617         int rc;
 618
 619         DEBUG(2,("Doing kerberos session setup\n"));
 620
 621         /* generate the encapsulated kerberos5 ticket */
 622         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0, NULL);
 623
 624         if (rc) {
 625                 DEBUG(1, ("cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: %s\n",
 626                         error_message(rc)));
 627                 return ADS_ERROR_KRB5(rc);
 628         }
 629
 630 #if 0
 631         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 632 #endif
 633
 634         if (!cli_session_setup_blob(cli, negTokenTarg, session_key_krb5)) {
 635                 data_blob_free(&negTokenTarg);
 636                 data_blob_free(&session_key_krb5);
 637                 return ADS_ERROR_NT(cli_nt_error(cli));
 638         }
 639
 640         cli_set_session_key(cli, session_key_krb5);
 641
 642         data_blob_free(&negTokenTarg);
 643         data_blob_free(&session_key_krb5);
 644
 645         if (cli_is_error(cli)) {
 646                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 647                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 648                 }
 649         }
 650         return ADS_ERROR_NT(cli_nt_error(cli));
 651 }
 652 #endif  /* HAVE_KRB5 */
 653
 654
 655 /****************************************************************************
 656  Do a spnego/NTLMSSP encrypted session setup.
 657 ****************************************************************************/
 658
 659 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 660                                           const char *pass, const char *domain)
 661 {
 662         struct ntlmssp_state *ntlmssp_state;
 663         NTSTATUS nt_status;
 664         int turn = 1;
 665         DATA_BLOB msg1;
 666         DATA_BLOB blob = data_blob_null;
 667         DATA_BLOB blob_in = data_blob_null;
 668         DATA_BLOB blob_out = data_blob_null;
 669
 670         cli_temp_set_signing(cli);
 671
 672         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 673                 return nt_status;
 674         }
 675         ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 676
 677         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 678                 return nt_status;
 679         }
 680         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 681                 return nt_status;
 682         }
 683         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 684                 return nt_status;
 685         }
 686
 687         do {
 688                 nt_status = ntlmssp_update(ntlmssp_state,
 689                                                   blob_in, &blob_out);
 690                 data_blob_free(&blob_in);
 691                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 692                         if (turn == 1) {
 693                                 /* and wrap it in a SPNEGO wrapper */
 694                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 695                         } else {
 696                                 /* wrap it in SPNEGO */
 697                                 msg1 = spnego_gen_auth(blob_out);
 698                         }
 699
 700                         /* now send that blob on its way */
 701                         if (!cli_session_setup_blob_send(cli, msg1)) {
 702                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 703                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 704                         } else {
 705                                 blob = cli_session_setup_blob_receive(cli);
 706
 707                                 nt_status = cli_nt_error(cli);
 708                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 709                                         if (cli->smb_rw_error == SMB_READ_BAD_SIG) {
 710                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 711                                         } else {
 712                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 713                                         }
 714                                 }
 715                         }
 716                         data_blob_free(&msg1);
 717                 }
 718
 719                 if (!blob.length) {
 720                         if (NT_STATUS_IS_OK(nt_status)) {
 721                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 722                         }
 723                 } else if ((turn == 1) &&
 724                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 725                         DATA_BLOB tmp_blob = data_blob_null;
 726                         /* the server might give us back two challenges */
 727                         if (!spnego_parse_challenge(blob, &blob_in,
 728                                                     &tmp_blob)) {
 729                                 DEBUG(3,("Failed to parse challenges\n"));
 730                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 731                         }
 732                         data_blob_free(&tmp_blob);
 733                 } else {
 734                         if (!spnego_parse_auth_response(blob, nt_status, OID_NTLMSSP,
 735                                                         &blob_in)) {
 736                                 DEBUG(3,("Failed to parse auth response\n"));
 737                                 if (NT_STATUS_IS_OK(nt_status)
 738                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 739                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 740                         }
 741                 }
 742                 data_blob_free(&blob);
 743                 data_blob_free(&blob_out);
 744                 turn++;
 745         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 746
 747         data_blob_free(&blob_in);
 748
 749         if (NT_STATUS_IS_OK(nt_status)) {
 750
 751                 DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
 752                                           ntlmssp_state->session_key.length);
 753                 DATA_BLOB null_blob = data_blob_null;
 754                 bool res;
 755
 756                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 757                 cli_set_session_key(cli, ntlmssp_state->session_key);
 758
 759                 res = cli_simple_set_signing(cli, key, null_blob);
 760
 761                 data_blob_free(&key);
 762
 763                 if (res) {
 764
 765                         /* 'resign' the last message, so we get the right sequence numbers
 766                            for checking the first reply from the server */
 767                         cli_calculate_sign_mac(cli, cli->outbuf);
 768
 769                         if (!cli_check_sign_mac(cli, cli->inbuf)) {
 770                                 nt_status = NT_STATUS_ACCESS_DENIED;
 771                         }
 772                 }
 773         }
 774
 775         /* we have a reference conter on ntlmssp_state, if we are signing
 776            then the state will be kept by the signing engine */
 777
 778         ntlmssp_end(&ntlmssp_state);
 779
 780         if (!NT_STATUS_IS_OK(nt_status)) {
 781                 cli->vuid = 0;
 782         }
 783         return nt_status;
 784 }
 785
 786 /****************************************************************************
 787  Do a spnego encrypted session setup.
 788 ****************************************************************************/
 789
 790 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 791                               const char *pass, const char *domain)
 792 {
 793         char *principal;
 794         char *OIDs[ASN1_MAX_OIDS];
 795         int i;
 796         bool got_kerberos_mechanism = False;
 797         DATA_BLOB blob;
 798         const char *p = NULL;
 799         char *account = NULL;
 800
 801         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 802
 803         /* the server might not even do spnego */
 804         if (cli->secblob.length <= 16) {
 805                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 806                 goto ntlmssp;
 807         }
 808
 809 #if 0
 810         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 811 #endif
 812
 813         /* there is 16 bytes of GUID before the real spnego packet starts */
 814         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 815
 816         /* the server sent us the first part of the SPNEGO exchange in the negprot
 817            reply */
 818         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 819                 data_blob_free(&blob);
 820                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 821         }
 822         data_blob_free(&blob);
 823
 824         /* make sure the server understands kerberos */
 825         for (i=0;OIDs[i];i++) {
 826                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 827                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 828                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 829                         got_kerberos_mechanism = True;
 830                 }
 831                 free(OIDs[i]);
 832         }
 833
 834         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 835
 836         if (got_kerberos_mechanism && (principal == NULL)) {
 837                 /*
 838                  * It is WRONG to depend on the principal sent in the negprot
 839                  * reply, but right now we do it. So for safety (don't
 840                  * segfault later) disable Kerberos when no principal was
 841                  * sent. -- VL
 842                  */
 843                 DEBUG(1, ("Kerberos mech was offered, but no principal was "
 844                           "sent, disabling Kerberos\n"));
 845                 cli->use_kerberos = False;
 846         }
 847
 848         fstrcpy(cli->user_name, user);
 849
 850 #ifdef HAVE_KRB5
 851         /* If password is set we reauthenticate to kerberos server
 852          * and do not store results */
 853
 854         if (got_kerberos_mechanism && cli->use_kerberos) {
 855                 ADS_STATUS rc;
 856
 857                 if (pass && *pass) {
 858                         int ret;
 859
 860                         use_in_memory_ccache();
 861                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 862
 863                         if (ret){
 864                                 SAFE_FREE(principal);
 865                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 866                                 if (cli->fallback_after_kerberos)
 867                                         goto ntlmssp;
 868                                 return ADS_ERROR_KRB5(ret);
 869                         }
 870                 }
 871
 872                 /* If we get a bad principal, try to guess it if
 873                    we have a valid host NetBIOS name.
 874                  */
 875                 if (strequal(principal, ADS_IGNORE_PRINCIPAL)) {
 876                         SAFE_FREE(principal);
 877                 }
 878
 879                 if (principal == NULL &&
 880                         !is_ipaddress(cli->desthost) &&
 881                         !strequal(star_smbserver_name,
 882                                 cli->desthost)) {
 883                         char *realm = NULL;
 884                         char *machine = NULL;
 885                         char *host = NULL;
 886                         DEBUG(3,("cli_session_setup_spnego: got a "
 887                                 "bad server principal, trying to guess ...\n"));
 888
 889                         host = strchr_m(cli->desthost, '.');
 890                         if (host) {
 891                                 machine = SMB_STRNDUP(cli->desthost,
 892                                         host - cli->desthost);
 893                         } else {
 894                                 machine = SMB_STRDUP(cli->desthost);
 895                         }
 896                         if (machine == NULL) {
 897                                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 898                         }
 899
 900                         realm = kerberos_get_default_realm_from_ccache();
 901                         if (realm && *realm) {
 902                                 if (asprintf(&principal, "%s$@%s",
 903                                                 machine, realm) < 0) {
 904                                         SAFE_FREE(machine);
 905                                         SAFE_FREE(realm);
 906                                         return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 907                                 }
 908                                 DEBUG(3,("cli_session_setup_spnego: guessed "
 909                                         "server principal=%s\n",
 910                                         principal ? principal : "<null>"));
 911                         }
 912                         SAFE_FREE(machine);
 913                         SAFE_FREE(realm);
 914                 }
 915
 916                 if (principal) {
 917                         rc = cli_session_setup_kerberos(cli, principal, domain);
 918                         if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 919                                 SAFE_FREE(principal);
 920                                 return rc;
 921                         }
 922                 }
 923         }
 924 #endif
 925
 926         SAFE_FREE(principal);
 927
 928 ntlmssp:
 929
 930         account = talloc_strdup(talloc_tos(), user);
 931         ADS_ERROR_HAVE_NO_MEMORY(account);
 932
 933         /* when falling back to ntlmssp while authenticating with a machine
 934          * account strip off the realm - gd */
 935
 936         if ((p = strchr_m(user, '@')) != NULL) {
 937                 account[PTR_DIFF(p,user)] = '\0';
 938         }
 939
 940         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, account, pass, domain));
 941 }
 942
 943 /****************************************************************************
 944  Send a session setup. The username and workgroup is in UNIX character
 945  format and must be converted to DOS codepage format before sending. If the
 946  password is in plaintext, the same should be done.
 947 ****************************************************************************/
 948
 949 NTSTATUS cli_session_setup(struct cli_state *cli,
 950                            const char *user,
 951                            const char *pass, int passlen,
 952                            const char *ntpass, int ntpasslen,
 953                            const char *workgroup)
 954 {
 955         char *p;
 956         fstring user2;
 957
 958         if (user) {
 959                 fstrcpy(user2, user);
 960         } else {
 961                 user2[0] ='\0';
 962         }
 963
 964         if (!workgroup) {
 965                 workgroup = "";
 966         }
 967
 968         /* allow for workgroups as part of the username */
 969         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 970             (p=strchr_m(user2,*lp_winbind_separator()))) {
 971                 *p = 0;
 972                 user = p+1;
 973                 workgroup = user2;
 974         }
 975
 976         if (cli->protocol < PROTOCOL_LANMAN1) {
 977                 return NT_STATUS_OK;
 978         }
 979
 980         /* now work out what sort of session setup we are going to
 981            do. I have split this into separate functions to make the
 982            flow a bit easier to understand (tridge) */
 983
 984         /* if its an older server then we have to use the older request format */
 985
 986         if (cli->protocol < PROTOCOL_NT1) {
 987                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 988                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 989                                   " is disabled\n"));
 990                         return NT_STATUS_ACCESS_DENIED;
 991                 }
 992
 993                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 994                     !lp_client_plaintext_auth() && (*pass)) {
 995                         DEBUG(1, ("Server requested plaintext password but "
 996                                   "'client plaintext auth' is disabled\n"));
 997                         return NT_STATUS_ACCESS_DENIED;
 998                 }
 999
1000                 return cli_session_setup_lanman2(cli, user, pass, passlen,
1001                                                  workgroup);
1002         }
1003
1004         /* if no user is supplied then we have to do an anonymous connection.
1005            passwords are ignored */
1006
1007         if (!user || !*user)
1008                 return cli_session_setup_guest(cli);
1009
1010         /* if the server is share level then send a plaintext null
1011            password at this point. The password is sent in the tree
1012            connect */
1013
1014         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
1015                 return cli_session_setup_plaintext(cli, user, "", workgroup);
1016
1017         /* if the server doesn't support encryption then we have to use
1018            plaintext. The second password is ignored */
1019
1020         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
1021                 if (!lp_client_plaintext_auth() && (*pass)) {
1022                         DEBUG(1, ("Server requested plaintext password but "
1023                                   "'client plaintext auth' is disabled\n"));
1024                         return NT_STATUS_ACCESS_DENIED;
1025                 }
1026                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
1027         }
1028
1029         /* if the server supports extended security then use SPNEGO */
1030
1031         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
1032                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass, workgroup);
1033                 if (!ADS_ERR_OK(status)) {
1034                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
1035                         return ads_ntstatus(status);
1036                 }
1037         } else {
1038                 NTSTATUS status;
1039
1040                 /* otherwise do a NT1 style session setup */
1041                 status = cli_session_setup_nt1(cli, user, pass, passlen,
1042                                                ntpass, ntpasslen, workgroup);
1043                 if (!NT_STATUS_IS_OK(status)) {
1044                         DEBUG(3,("cli_session_setup: NT1 session setup "
1045                                  "failed: %s\n", nt_errstr(status)));
1046                         return status;
1047                 }
1048         }
1049
1050         if (strstr(cli->server_type, "Samba")) {
1051                 cli->is_samba = True;
1052         }
1053
1054         return NT_STATUS_OK;
1055 }
1056
1057 /****************************************************************************
1058  Send a uloggoff.
1059 *****************************************************************************/
1060
1061 bool cli_ulogoff(struct cli_state *cli)
1062 {
1063         memset(cli->outbuf,'\0',smb_size);
1064         cli_set_message(cli->outbuf,2,0,True);
1065         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
1066         cli_setup_packet(cli);
1067         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1068         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
1069
1070         cli_send_smb(cli);
1071         if (!cli_receive_smb(cli))
1072                 return False;
1073
1074         if (cli_is_error(cli)) {
1075                 return False;
1076         }
1077
1078         cli->cnum = -1;
1079         return True;
1080 }
1081
1082 /****************************************************************************
1083  Send a tconX.
1084 ****************************************************************************/
1085
1086 bool cli_send_tconX(struct cli_state *cli,
1087                     const char *share, const char *dev, const char *pass, int passlen)
1088 {
1089         fstring fullshare, pword;
1090         char *p;
1091         memset(cli->outbuf,'\0',smb_size);
1092         memset(cli->inbuf,'\0',smb_size);
1093
1094         fstrcpy(cli->share, share);
1095
1096         /* in user level security don't send a password now */
1097         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1098                 passlen = 1;
1099                 pass = "";
1100         } else if (!pass) {
1101                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1102                 return False;
1103         }
1104
1105         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1106             *pass && passlen != 24) {
1107                 if (!lp_client_lanman_auth()) {
1108                         DEBUG(1, ("Server requested LANMAN password "
1109                                   "(share-level security) but "
1110                                   "'client lanman auth' is disabled\n"));
1111                         return False;
1112                 }
1113
1114                 /*
1115                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1116                  */
1117                 passlen = 24;
1118                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1119         } else {
1120                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1121                         if (!lp_client_plaintext_auth() && (*pass)) {
1122                                 DEBUG(1, ("Server requested plaintext "
1123                                           "password but 'client plaintext "
1124                                           "auth' is disabled\n"));
1125                                 return False;
1126                         }
1127
1128                         /*
1129                          * Non-encrypted passwords - convert to DOS codepage before using.
1130                          */
1131                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1132
1133                 } else {
1134                         if (passlen) {
1135                                 memcpy(pword, pass, passlen);
1136                         }
1137                 }
1138         }
1139
1140         slprintf(fullshare, sizeof(fullshare)-1,
1141                  "\\\\%s\\%s", cli->desthost, share);
1142
1143         cli_set_message(cli->outbuf,4, 0, True);
1144         SCVAL(cli->outbuf,smb_com,SMBtconX);
1145         cli_setup_packet(cli);
1146
1147         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1148         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1149         SSVAL(cli->outbuf,smb_vwv3,passlen);
1150
1151         p = smb_buf(cli->outbuf);
1152         if (passlen) {
1153                 memcpy(p,pword,passlen);
1154         }
1155         p += passlen;
1156         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1157         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1158
1159         cli_setup_bcc(cli, p);
1160
1161         cli_send_smb(cli);
1162         if (!cli_receive_smb(cli))
1163                 return False;
1164
1165         if (cli_is_error(cli))
1166                 return False;
1167
1168         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1169
1170         if (cli->protocol >= PROTOCOL_NT1 &&
1171             smb_buflen(cli->inbuf) == 3) {
1172                 /* almost certainly win95 - enable bug fixes */
1173                 cli->win95 = True;
1174         }
1175
1176         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1177         /* Avoids issues when connecting to Win9x boxes sharing files */
1178
1179         cli->dfsroot = False;
1180         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1181                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1182
1183         cli->cnum = SVAL(cli->inbuf,smb_tid);
1184         return True;
1185 }
1186
1187 /****************************************************************************
1188  Send a tree disconnect.
1189 ****************************************************************************/
1190
1191 bool cli_tdis(struct cli_state *cli)
1192 {
1193         memset(cli->outbuf,'\0',smb_size);
1194         cli_set_message(cli->outbuf,0,0,True);
1195         SCVAL(cli->outbuf,smb_com,SMBtdis);
1196         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1197         cli_setup_packet(cli);
1198
1199         cli_send_smb(cli);
1200         if (!cli_receive_smb(cli))
1201                 return False;
1202
1203         if (cli_is_error(cli)) {
1204                 return False;
1205         }
1206
1207         cli->cnum = -1;
1208         return True;
1209 }
1210
1211 /****************************************************************************
1212  Send a negprot command.
1213 ****************************************************************************/
1214
1215 void cli_negprot_send(struct cli_state *cli)
1216 {
1217         char *p;
1218         int numprots;
1219
1220         if (cli->protocol < PROTOCOL_NT1)
1221                 cli->use_spnego = False;
1222
1223         memset(cli->outbuf,'\0',smb_size);
1224
1225         /* setup the protocol strings */
1226         cli_set_message(cli->outbuf,0,0,True);
1227
1228         p = smb_buf(cli->outbuf);
1229         for (numprots=0;
1230              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1231              numprots++) {
1232                 *p++ = 2;
1233                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1234         }
1235
1236         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1237         cli_setup_bcc(cli, p);
1238         cli_setup_packet(cli);
1239
1240         SCVAL(smb_buf(cli->outbuf),0,2);
1241
1242         cli_send_smb(cli);
1243 }
1244
1245 /****************************************************************************
1246  Send a negprot command.
1247 ****************************************************************************/
1248
1249 bool cli_negprot(struct cli_state *cli)
1250 {
1251         char *p;
1252         int numprots;
1253         int plength;
1254
1255         if (cli->protocol < PROTOCOL_NT1)
1256                 cli->use_spnego = False;
1257
1258         memset(cli->outbuf,'\0',smb_size);
1259
1260         /* setup the protocol strings */
1261         for (plength=0,numprots=0;
1262              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1263              numprots++)
1264                 plength += strlen(prots[numprots].name)+2;
1265
1266         cli_set_message(cli->outbuf,0,plength,True);
1267
1268         p = smb_buf(cli->outbuf);
1269         for (numprots=0;
1270              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1271              numprots++) {
1272                 *p++ = 2;
1273                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1274         }
1275
1276         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1277         cli_setup_packet(cli);
1278
1279         SCVAL(smb_buf(cli->outbuf),0,2);
1280
1281         cli_send_smb(cli);
1282         if (!cli_receive_smb(cli))
1283                 return False;
1284
1285         show_msg(cli->inbuf);
1286
1287         if (cli_is_error(cli) ||
1288             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1289                 return(False);
1290         }
1291
1292         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1293
1294         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1295                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1296                 return False;
1297         }
1298
1299         if (cli->protocol >= PROTOCOL_NT1) {
1300                 struct timespec ts;
1301                 /* NT protocol */
1302                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1303                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1304                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1305                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1306                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1307                 cli->serverzone *= 60;
1308                 /* this time arrives in real GMT */
1309                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1310                 cli->servertime = ts.tv_sec;
1311                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1312                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1313                 if (cli->capabilities & CAP_RAW_MODE) {
1314                         cli->readbraw_supported = True;
1315                         cli->writebraw_supported = True;
1316                 }
1317                 /* work out if they sent us a workgroup */
1318                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1319                     smb_buflen(cli->inbuf) > 8) {
1320                         clistr_pull(cli, cli->server_domain,
1321                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1322                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1323                 }
1324
1325                 /*
1326                  * As signing is slow we only turn it on if either the client or
1327                  * the server require it. JRA.
1328                  */
1329
1330                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1331                         /* Fail if server says signing is mandatory and we don't want to support it. */
1332                         if (!cli->sign_info.allow_smb_signing) {
1333                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1334                                 return False;
1335                         }
1336                         cli->sign_info.negotiated_smb_signing = True;
1337                         cli->sign_info.mandatory_signing = True;
1338                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1339                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1340                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1341                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1342                                 return False;
1343                         }
1344                         cli->sign_info.negotiated_smb_signing = True;
1345                         cli->sign_info.mandatory_signing = True;
1346                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1347                         cli->sign_info.negotiated_smb_signing = True;
1348                 }
1349
1350                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1351                         SAFE_FREE(cli->outbuf);
1352                         SAFE_FREE(cli->inbuf);
1353                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1354                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1355                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
1356                 }
1357
1358         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1359                 cli->use_spnego = False;
1360                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1361                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1362                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1363                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1364                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1365                 cli->serverzone *= 60;
1366                 /* this time is converted to GMT by make_unix_date */
1367                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1368                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1369                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1370                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1371         } else {
1372                 /* the old core protocol */
1373                 cli->use_spnego = False;
1374                 cli->sec_mode = 0;
1375                 cli->serverzone = get_time_zone(time(NULL));
1376         }
1377
1378         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1379
1380         /* a way to force ascii SMB */
1381         if (getenv("CLI_FORCE_ASCII"))
1382                 cli->capabilities &= ~CAP_UNICODE;
1383
1384         return True;
1385 }
1386
1387 /****************************************************************************
1388  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1389 ****************************************************************************/
1390
1391 bool cli_session_request(struct cli_state *cli,
1392                          struct nmb_name *calling, struct nmb_name *called)
1393 {
1394         char *p;
1395         int len = 4;
1396
1397         memcpy(&(cli->calling), calling, sizeof(*calling));
1398         memcpy(&(cli->called ), called , sizeof(*called ));
1399
1400         /* put in the destination name */
1401         p = cli->outbuf+len;
1402         name_mangle(cli->called .name, p, cli->called .name_type);
1403         len += name_len(p);
1404
1405         /* and my name */
1406         p = cli->outbuf+len;
1407         name_mangle(cli->calling.name, p, cli->calling.name_type);
1408         len += name_len(p);
1409
1410         /* 445 doesn't have session request */
1411         if (cli->port == 445)
1412                 return True;
1413
1414         /* send a session request (RFC 1002) */
1415         /* setup the packet length
1416          * Remove four bytes from the length count, since the length
1417          * field in the NBT Session Service header counts the number
1418          * of bytes which follow.  The cli_send_smb() function knows
1419          * about this and accounts for those four bytes.
1420          * CRH.
1421          */
1422         len -= 4;
1423         _smb_setlen(cli->outbuf,len);
1424         SCVAL(cli->outbuf,0,0x81);
1425
1426         cli_send_smb(cli);
1427         DEBUG(5,("Sent session request\n"));
1428
1429         if (!cli_receive_smb(cli))
1430                 return False;
1431
1432         if (CVAL(cli->inbuf,0) == 0x84) {
1433                 /* C. Hoch  9/14/95 Start */
1434                 /* For information, here is the response structure.
1435                  * We do the byte-twiddling to for portability.
1436                 struct RetargetResponse{
1437                 unsigned char type;
1438                 unsigned char flags;
1439                 int16 length;
1440                 int32 ip_addr;
1441                 int16 port;
1442                 };
1443                 */
1444                 uint16_t port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1445                 struct in_addr dest_ip;
1446
1447                 /* SESSION RETARGET */
1448                 putip((char *)&dest_ip,cli->inbuf+4);
1449                 in_addr_to_sockaddr_storage(&cli->dest_ss, dest_ip);
1450
1451                 cli->fd = open_socket_out(SOCK_STREAM,
1452                                 &cli->dest_ss,
1453                                 port,
1454                                 LONG_CONNECT_TIMEOUT);
1455                 if (cli->fd == -1)
1456                         return False;
1457
1458                 DEBUG(3,("Retargeted\n"));
1459
1460                 set_socket_options(cli->fd, lp_socket_options());
1461
1462                 /* Try again */
1463                 {
1464                         static int depth;
1465                         bool ret;
1466                         if (depth > 4) {
1467                                 DEBUG(0,("Retarget recursion - failing\n"));
1468                                 return False;
1469                         }
1470                         depth++;
1471                         ret = cli_session_request(cli, calling, called);
1472                         depth--;
1473                         return ret;
1474                 }
1475         } /* C. Hoch 9/14/95 End */
1476
1477         if (CVAL(cli->inbuf,0) != 0x82) {
1478                 /* This is the wrong place to put the error... JRA. */
1479                 cli->rap_error = CVAL(cli->inbuf,4);
1480                 return False;
1481         }
1482         return(True);
1483 }
1484
1485 /****************************************************************************
1486  Open the client sockets.
1487 ****************************************************************************/
1488
1489 NTSTATUS cli_connect(struct cli_state *cli,
1490                 const char *host,
1491                 struct sockaddr_storage *dest_ss)
1492
1493 {
1494         int name_type = 0x20;
1495         TALLOC_CTX *frame = talloc_stackframe();
1496         unsigned int num_addrs = 0;
1497         unsigned int i = 0;
1498         struct sockaddr_storage *ss_arr = NULL;
1499         char *p = NULL;
1500
1501         /* reasonable default hostname */
1502         if (!host) {
1503                 host = star_smbserver_name;
1504         }
1505
1506         fstrcpy(cli->desthost, host);
1507
1508         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1509         if ((p = strchr(cli->desthost, '#'))) {
1510                 name_type = strtol(p+1, NULL, 16);
1511                 *p = 0;
1512         }
1513
1514         if (!dest_ss || is_zero_addr(dest_ss)) {
1515                 NTSTATUS status =resolve_name_list(frame,
1516                                         cli->desthost,
1517                                         name_type,
1518                                         &ss_arr,
1519                                         &num_addrs);
1520                 if (!NT_STATUS_IS_OK(status)) {
1521                         TALLOC_FREE(frame);
1522                         return NT_STATUS_BAD_NETWORK_NAME;
1523                 }
1524         } else {
1525                 num_addrs = 1;
1526                 ss_arr = TALLOC_P(frame, struct sockaddr_storage);
1527                 if (!ss_arr) {
1528                         TALLOC_FREE(frame);
1529                         return NT_STATUS_NO_MEMORY;
1530                 }
1531                 *ss_arr = *dest_ss;
1532         }
1533
1534         for (i = 0; i < num_addrs; i++) {
1535                 cli->dest_ss = ss_arr[i];
1536                 if (getenv("LIBSMB_PROG")) {
1537                         cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1538                 } else {
1539                         /* try 445 first, then 139 */
1540                         uint16_t port = cli->port?cli->port:445;
1541                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1542                                                   port, cli->timeout);
1543                         if (cli->fd == -1 && cli->port == 0) {
1544                                 port = 139;
1545                                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1546                                                           port, cli->timeout);
1547                         }
1548                         if (cli->fd != -1) {
1549                                 cli->port = port;
1550                         }
1551                 }
1552                 if (cli->fd == -1) {
1553                         char addr[INET6_ADDRSTRLEN];
1554                         print_sockaddr(addr, sizeof(addr), &ss_arr[i]);
1555                         DEBUG(2,("Error connecting to %s (%s)\n",
1556                                  dest_ss?addr:host,strerror(errno)));
1557                 } else {
1558                         /* Exit from loop on first connection. */
1559                         break;
1560                 }
1561         }
1562
1563         if (cli->fd == -1) {
1564                 TALLOC_FREE(frame);
1565                 return map_nt_error_from_unix(errno);
1566         }
1567
1568         if (dest_ss) {
1569                 *dest_ss = cli->dest_ss;
1570         }
1571
1572         set_socket_options(cli->fd, lp_socket_options());
1573
1574         TALLOC_FREE(frame);
1575         return NT_STATUS_OK;
1576 }
1577
1578 /**
1579    establishes a connection to after the negprot.
1580    @param output_cli A fully initialised cli structure, non-null only on success
1581    @param dest_host The netbios name of the remote host
1582    @param dest_ss (optional) The the destination IP, NULL for name based lookup
1583    @param port (optional) The destination port (0 for default)
1584    @param retry bool. Did this connection fail with a retryable error ?
1585
1586 */
1587 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1588                               const char *my_name,
1589                               const char *dest_host,
1590                               struct sockaddr_storage *dest_ss, int port,
1591                               int signing_state, int flags,
1592                               bool *retry)
1593 {
1594         NTSTATUS nt_status;
1595         struct nmb_name calling;
1596         struct nmb_name called;
1597         struct cli_state *cli;
1598         struct sockaddr_storage ss;
1599
1600         if (retry)
1601                 *retry = False;
1602
1603         if (!my_name)
1604                 my_name = global_myname();
1605
1606         if (!(cli = cli_initialise())) {
1607                 return NT_STATUS_NO_MEMORY;
1608         }
1609
1610         make_nmb_name(&calling, my_name, 0x0);
1611         make_nmb_name(&called , dest_host, 0x20);
1612
1613         if (cli_set_port(cli, port) != port) {
1614                 cli_shutdown(cli);
1615                 return NT_STATUS_UNSUCCESSFUL;
1616         }
1617
1618         cli_set_timeout(cli, 10000); /* 10 seconds. */
1619
1620         if (dest_ss) {
1621                 ss = *dest_ss;
1622         } else {
1623                 zero_addr(&ss);
1624         }
1625
1626 again:
1627
1628         DEBUG(3,("Connecting to host=%s\n", dest_host));
1629
1630         nt_status = cli_connect(cli, dest_host, &ss);
1631         if (!NT_STATUS_IS_OK(nt_status)) {
1632                 char addr[INET6_ADDRSTRLEN];
1633                 print_sockaddr(addr, sizeof(addr), &ss);
1634                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s). Error %s\n",
1635                          nmb_namestr(&called), addr, nt_errstr(nt_status) ));
1636                 cli_shutdown(cli);
1637                 return nt_status;
1638         }
1639
1640         if (retry)
1641                 *retry = True;
1642
1643         if (!cli_session_request(cli, &calling, &called)) {
1644                 char *p;
1645                 DEBUG(1,("session request to %s failed (%s)\n",
1646                          called.name, cli_errstr(cli)));
1647                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1648                         *p = 0;
1649                         goto again;
1650                 }
1651                 if (strcmp(called.name, star_smbserver_name)) {
1652                         make_nmb_name(&called , star_smbserver_name, 0x20);
1653                         goto again;
1654                 }
1655                 return NT_STATUS_BAD_NETWORK_NAME;
1656         }
1657
1658         cli_setup_signing_state(cli, signing_state);
1659
1660         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1661                 cli->use_spnego = False;
1662         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1663                 cli->use_kerberos = True;
1664
1665         if ((flags & CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS) &&
1666              cli->use_kerberos) {
1667                 cli->fallback_after_kerberos = true;
1668         }
1669
1670         if (!cli_negprot(cli)) {
1671                 DEBUG(1,("failed negprot\n"));
1672                 nt_status = cli_nt_error(cli);
1673                 if (NT_STATUS_IS_OK(nt_status)) {
1674                         nt_status = NT_STATUS_UNSUCCESSFUL;
1675                 }
1676                 cli_shutdown(cli);
1677                 return nt_status;
1678         }
1679
1680         *output_cli = cli;
1681         return NT_STATUS_OK;
1682 }
1683
1684
1685 /**
1686    establishes a connection right up to doing tconX, password specified.
1687    @param output_cli A fully initialised cli structure, non-null only on success
1688    @param dest_host The netbios name of the remote host
1689    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1690    @param port (optional) The destination port (0 for default)
1691    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1692    @param service_type The 'type' of serivice.
1693    @param user Username, unix string
1694    @param domain User's domain
1695    @param password User's password, unencrypted unix string.
1696    @param retry bool. Did this connection fail with a retryable error ?
1697 */
1698
1699 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1700                              const char *my_name,
1701                              const char *dest_host,
1702                              struct sockaddr_storage *dest_ss, int port,
1703                              const char *service, const char *service_type,
1704                              const char *user, const char *domain,
1705                              const char *password, int flags,
1706                              int signing_state,
1707                              bool *retry)
1708 {
1709         NTSTATUS nt_status;
1710         struct cli_state *cli = NULL;
1711         int pw_len = password ? strlen(password)+1 : 0;
1712
1713         *output_cli = NULL;
1714
1715         if (password == NULL) {
1716                 password = "";
1717         }
1718
1719         nt_status = cli_start_connection(&cli, my_name, dest_host,
1720                                          dest_ss, port, signing_state,
1721                                          flags, retry);
1722
1723         if (!NT_STATUS_IS_OK(nt_status)) {
1724                 return nt_status;
1725         }
1726
1727         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1728                                       pw_len, domain);
1729         if (!NT_STATUS_IS_OK(nt_status)) {
1730
1731                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1732                         DEBUG(1,("failed session setup with %s\n",
1733                                  nt_errstr(nt_status)));
1734                         cli_shutdown(cli);
1735                         return nt_status;
1736                 }
1737
1738                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1739                 if (!NT_STATUS_IS_OK(nt_status)) {
1740                         DEBUG(1,("anonymous failed session setup with %s\n",
1741                                  nt_errstr(nt_status)));
1742                         cli_shutdown(cli);
1743                         return nt_status;
1744                 }
1745         }
1746
1747         if (service) {
1748                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1749                         nt_status = cli_nt_error(cli);
1750                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1751                         cli_shutdown(cli);
1752                         if (NT_STATUS_IS_OK(nt_status)) {
1753                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1754                         }
1755                         return nt_status;
1756                 }
1757         }
1758
1759         cli_init_creds(cli, user, domain, password);
1760
1761         *output_cli = cli;
1762         return NT_STATUS_OK;
1763 }
1764
1765 /****************************************************************************
1766  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1767 ****************************************************************************/
1768
1769 bool attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1770                                      struct sockaddr_storage *pdest_ss)
1771 {
1772         struct nmb_name calling, called;
1773
1774         make_nmb_name(&calling, srchost, 0x0);
1775
1776         /*
1777          * If the called name is an IP address
1778          * then use *SMBSERVER immediately.
1779          */
1780
1781         if(is_ipaddress(desthost)) {
1782                 make_nmb_name(&called, star_smbserver_name, 0x20);
1783         } else {
1784                 make_nmb_name(&called, desthost, 0x20);
1785         }
1786
1787         if (!cli_session_request(*ppcli, &calling, &called)) {
1788                 NTSTATUS status;
1789                 struct nmb_name smbservername;
1790
1791                 make_nmb_name(&smbservername, star_smbserver_name, 0x20);
1792
1793                 /*
1794                  * If the name wasn't *SMBSERVER then
1795                  * try with *SMBSERVER if the first name fails.
1796                  */
1797
1798                 if (nmb_name_equal(&called, &smbservername)) {
1799
1800                         /*
1801                          * The name used was *SMBSERVER, don't bother with another name.
1802                          */
1803
1804                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1805 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1806                         return False;
1807                 }
1808
1809                 /* Try again... */
1810                 cli_shutdown(*ppcli);
1811
1812                 *ppcli = cli_initialise();
1813                 if (!*ppcli) {
1814                         /* Out of memory... */
1815                         return False;
1816                 }
1817
1818                 status = cli_connect(*ppcli, desthost, pdest_ss);
1819                 if (!NT_STATUS_IS_OK(status) ||
1820                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1821                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1822 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1823                         return False;
1824                 }
1825         }
1826
1827         return True;
1828 }
1829
1830 /****************************************************************************
1831  Send an old style tcon.
1832 ****************************************************************************/
1833 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1834                       const char *service, const char *pass, const char *dev,
1835                       uint16 *max_xmit, uint16 *tid)
1836 {
1837         char *p;
1838
1839         if (!lp_client_plaintext_auth() && (*pass)) {
1840                 DEBUG(1, ("Server requested plaintext password but 'client "
1841                           "plaintext auth' is disabled\n"));
1842                 return NT_STATUS_ACCESS_DENIED;
1843         }
1844
1845         memset(cli->outbuf,'\0',smb_size);
1846         memset(cli->inbuf,'\0',smb_size);
1847
1848         cli_set_message(cli->outbuf, 0, 0, True);
1849         SCVAL(cli->outbuf,smb_com,SMBtcon);
1850         cli_setup_packet(cli);
1851
1852         p = smb_buf(cli->outbuf);
1853         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1854         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1855         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1856
1857         cli_setup_bcc(cli, p);
1858
1859         cli_send_smb(cli);
1860         if (!cli_receive_smb(cli)) {
1861                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1862         }
1863
1864         if (cli_is_error(cli)) {
1865                 return cli_nt_error(cli);
1866         }
1867
1868         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1869         *tid = SVAL(cli->inbuf, smb_vwv1);
1870
1871         return NT_STATUS_OK;
1872 }
1873
1874 /* Return a cli_state pointing at the IPC$ share for the given server */
1875
1876 struct cli_state *get_ipc_connect(char *server,
1877                                 struct sockaddr_storage *server_ss,
1878                                 const struct user_auth_info *user_info)
1879 {
1880         struct cli_state *cli;
1881         NTSTATUS nt_status;
1882         uint32_t flags = CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK;
1883
1884         if (user_info->use_kerberos) {
1885                 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
1886         }
1887
1888         nt_status = cli_full_connection(&cli, NULL, server, server_ss, 0, "IPC$", "IPC",
1889                                         user_info->username ? user_info->username : "",
1890                                         lp_workgroup(),
1891                                         user_info->password ? user_info->password : "",
1892                                         flags,
1893                                         Undefined, NULL);
1894
1895         if (NT_STATUS_IS_OK(nt_status)) {
1896                 return cli;
1897         } else if (is_ipaddress(server)) {
1898             /* windows 9* needs a correct NMB name for connections */
1899             fstring remote_name;
1900
1901             if (name_status_find("*", 0, 0, server_ss, remote_name)) {
1902                 cli = get_ipc_connect(remote_name, server_ss, user_info);
1903                 if (cli)
1904                     return cli;
1905             }
1906         }
1907         return NULL;
1908 }
1909
1910 /*
1911  * Given the IP address of a master browser on the network, return its
1912  * workgroup and connect to it.
1913  *
1914  * This function is provided to allow additional processing beyond what
1915  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1916  * browsers and obtain each master browsers' list of domains (in case the
1917  * first master browser is recently on the network and has not yet
1918  * synchronized with other master browsers and therefore does not yet have the
1919  * entire network browse list)
1920  */
1921
1922 struct cli_state *get_ipc_connect_master_ip(TALLOC_CTX *ctx,
1923                                 struct ip_service *mb_ip,
1924                                 const struct user_auth_info *user_info,
1925                                 char **pp_workgroup_out)
1926 {
1927         char addr[INET6_ADDRSTRLEN];
1928         fstring name;
1929         struct cli_state *cli;
1930         struct sockaddr_storage server_ss;
1931
1932         *pp_workgroup_out = NULL;
1933
1934         print_sockaddr(addr, sizeof(addr), &mb_ip->ss);
1935         DEBUG(99, ("Looking up name of master browser %s\n",
1936                    addr));
1937
1938         /*
1939          * Do a name status query to find out the name of the master browser.
1940          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1941          * master browser will not respond to a wildcard query (or, at least,
1942          * an NT4 server acting as the domain master browser will not).
1943          *
1944          * We might be able to use ONLY the query on MSBROWSE, but that's not
1945          * yet been tested with all Windows versions, so until it is, leave
1946          * the original wildcard query as the first choice and fall back to
1947          * MSBROWSE if the wildcard query fails.
1948          */
1949         if (!name_status_find("*", 0, 0x1d, &mb_ip->ss, name) &&
1950             !name_status_find(MSBROWSE, 1, 0x1d, &mb_ip->ss, name)) {
1951
1952                 DEBUG(99, ("Could not retrieve name status for %s\n",
1953                            addr));
1954                 return NULL;
1955         }
1956
1957         if (!find_master_ip(name, &server_ss)) {
1958                 DEBUG(99, ("Could not find master ip for %s\n", name));
1959                 return NULL;
1960         }
1961
1962         *pp_workgroup_out = talloc_strdup(ctx, name);
1963
1964         DEBUG(4, ("found master browser %s, %s\n", name, addr));
1965
1966         print_sockaddr(addr, sizeof(addr), &server_ss);
1967         cli = get_ipc_connect(addr, &server_ss, user_info);
1968
1969         return cli;
1970 }
1971
1972 /*
1973  * Return the IP address and workgroup of a master browser on the network, and
1974  * connect to it.
1975  */
1976
1977 struct cli_state *get_ipc_connect_master_ip_bcast(TALLOC_CTX *ctx,
1978                                         const struct user_auth_info *user_info,
1979                                         char **pp_workgroup_out)
1980 {
1981         struct ip_service *ip_list;
1982         struct cli_state *cli;
1983         int i, count;
1984
1985         *pp_workgroup_out = NULL;
1986
1987         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1988
1989         /* Go looking for workgroups by broadcasting on the local network */
1990
1991         if (!NT_STATUS_IS_OK(name_resolve_bcast(MSBROWSE, 1, &ip_list,
1992                                                 &count))) {
1993                 DEBUG(99, ("No master browsers responded\n"));
1994                 return False;
1995         }
1996
1997         for (i = 0; i < count; i++) {
1998                 char addr[INET6_ADDRSTRLEN];
1999                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
2000                 DEBUG(99, ("Found master browser %s\n", addr));
2001
2002                 cli = get_ipc_connect_master_ip(ctx, &ip_list[i],
2003                                 user_info, pp_workgroup_out);
2004                 if (cli)
2005                         return(cli);
2006         }
2007
2008         return NULL;
2009 }