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  user_domain: The shortname of the domain the user/machine is a member of.
 790  dest_realm: The realm we're connecting to, if NULL we use our default realm.
 791 ****************************************************************************/
 792
 793 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 794                               const char *pass, const char *user_domain,
 795                               const char * dest_realm)
 796 {
 797         char *principal = NULL;
 798         char *OIDs[ASN1_MAX_OIDS];
 799         int i;
 800         DATA_BLOB blob;
 801         const char *p = NULL;
 802         char *account = NULL;
 803
 804         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 805
 806         /* the server might not even do spnego */
 807         if (cli->secblob.length <= 16) {
 808                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 809                 goto ntlmssp;
 810         }
 811
 812 #if 0
 813         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 814 #endif
 815
 816         /* there is 16 bytes of GUID before the real spnego packet starts */
 817         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 818
 819         /* The server sent us the first part of the SPNEGO exchange in the
 820          * negprot reply. It is WRONG to depend on the principal sent in the
 821          * negprot reply, but right now we do it. If we don't receive one,
 822          * we try to best guess, then fall back to NTLM.  */
 823         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 824                 data_blob_free(&blob);
 825                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 826         }
 827         data_blob_free(&blob);
 828
 829         /* make sure the server understands kerberos */
 830         for (i=0;OIDs[i];i++) {
 831                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 832                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 833                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 834                         cli->got_kerberos_mechanism = True;
 835                 }
 836                 free(OIDs[i]);
 837         }
 838
 839         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 840
 841         fstrcpy(cli->user_name, user);
 842
 843 #ifdef HAVE_KRB5
 844         /* If password is set we reauthenticate to kerberos server
 845          * and do not store results */
 846
 847         if (cli->got_kerberos_mechanism && cli->use_kerberos) {
 848                 ADS_STATUS rc;
 849
 850                 if (pass && *pass) {
 851                         int ret;
 852
 853                         use_in_memory_ccache();
 854                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 855
 856                         if (ret){
 857                                 SAFE_FREE(principal);
 858                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 859                                 if (cli->fallback_after_kerberos)
 860                                         goto ntlmssp;
 861                                 return ADS_ERROR_KRB5(ret);
 862                         }
 863                 }
 864
 865                 /* If we get a bad principal, try to guess it if
 866                    we have a valid host NetBIOS name.
 867                  */
 868                 if (strequal(principal, ADS_IGNORE_PRINCIPAL)) {
 869                         SAFE_FREE(principal);
 870                 }
 871
 872                 if (principal == NULL &&
 873                         !is_ipaddress(cli->desthost) &&
 874                         !strequal(star_smbserver_name,
 875                                 cli->desthost)) {
 876                         char *realm = NULL;
 877                         char *machine = NULL;
 878                         char *host = NULL;
 879                         DEBUG(3,("cli_session_setup_spnego: got a "
 880                                 "bad server principal, trying to guess ...\n"));
 881
 882                         host = strchr_m(cli->desthost, '.');
 883                         if (host) {
 884                                 machine = SMB_STRNDUP(cli->desthost,
 885                                         host - cli->desthost);
 886                         } else {
 887                                 machine = SMB_STRDUP(cli->desthost);
 888                         }
 889                         if (machine == NULL) {
 890                                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 891                         }
 892
 893                         if (dest_realm) {
 894                                 realm = SMB_STRDUP(dest_realm);
 895                                 strupper_m(realm);
 896                         } else {
 897                                 realm = kerberos_get_default_realm_from_ccache();
 898                         }
 899                         if (realm && *realm) {
 900                                 if (asprintf(&principal, "%s$@%s",
 901                                                 machine, realm) < 0) {
 902                                         SAFE_FREE(machine);
 903                                         SAFE_FREE(realm);
 904                                         return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 905                                 }
 906                                 DEBUG(3,("cli_session_setup_spnego: guessed "
 907                                         "server principal=%s\n",
 908                                         principal ? principal : "<null>"));
 909                         }
 910                         SAFE_FREE(machine);
 911                         SAFE_FREE(realm);
 912                 }
 913
 914                 if (principal) {
 915                         rc = cli_session_setup_kerberos(cli, principal,
 916                                 dest_realm);
 917                         if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 918                                 SAFE_FREE(principal);
 919                                 return rc;
 920                         }
 921                 }
 922         }
 923 #endif
 924
 925         SAFE_FREE(principal);
 926
 927 ntlmssp:
 928
 929         account = talloc_strdup(talloc_tos(), user);
 930         if (!account) {
 931                 return ADS_ERROR_NT(NT_STATUS_NO_MEMORY);
 932         }
 933
 934         /* when falling back to ntlmssp while authenticating with a machine
 935          * account strip off the realm - gd */
 936
 937         if ((p = strchr_m(user, '@')) != NULL) {
 938                 account[PTR_DIFF(p,user)] = '\0';
 939         }
 940
 941         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, account, pass, user_domain));
 942 }
 943
 944 /****************************************************************************
 945  Send a session setup. The username and workgroup is in UNIX character
 946  format and must be converted to DOS codepage format before sending. If the
 947  password is in plaintext, the same should be done.
 948 ****************************************************************************/
 949
 950 NTSTATUS cli_session_setup(struct cli_state *cli,
 951                            const char *user,
 952                            const char *pass, int passlen,
 953                            const char *ntpass, int ntpasslen,
 954                            const char *workgroup)
 955 {
 956         char *p;
 957         fstring user2;
 958
 959         if (user) {
 960                 fstrcpy(user2, user);
 961         } else {
 962                 user2[0] ='\0';
 963         }
 964
 965         if (!workgroup) {
 966                 workgroup = "";
 967         }
 968
 969         /* allow for workgroups as part of the username */
 970         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 971             (p=strchr_m(user2,*lp_winbind_separator()))) {
 972                 *p = 0;
 973                 user = p+1;
 974                 workgroup = user2;
 975         }
 976
 977         if (cli->protocol < PROTOCOL_LANMAN1) {
 978                 return NT_STATUS_OK;
 979         }
 980
 981         /* now work out what sort of session setup we are going to
 982            do. I have split this into separate functions to make the
 983            flow a bit easier to understand (tridge) */
 984
 985         /* if its an older server then we have to use the older request format */
 986
 987         if (cli->protocol < PROTOCOL_NT1) {
 988                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 989                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 990                                   " is disabled\n"));
 991                         return NT_STATUS_ACCESS_DENIED;
 992                 }
 993
 994                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 995                     !lp_client_plaintext_auth() && (*pass)) {
 996                         DEBUG(1, ("Server requested plaintext password but "
 997                                   "'client plaintext auth' is disabled\n"));
 998                         return NT_STATUS_ACCESS_DENIED;
 999                 }
1000
1001                 return cli_session_setup_lanman2(cli, user, pass, passlen,
1002                                                  workgroup);
1003         }
1004
1005         /* if no user is supplied then we have to do an anonymous connection.
1006            passwords are ignored */
1007
1008         if (!user || !*user)
1009                 return cli_session_setup_guest(cli);
1010
1011         /* if the server is share level then send a plaintext null
1012            password at this point. The password is sent in the tree
1013            connect */
1014
1015         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
1016                 return cli_session_setup_plaintext(cli, user, "", workgroup);
1017
1018         /* if the server doesn't support encryption then we have to use
1019            plaintext. The second password is ignored */
1020
1021         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
1022                 if (!lp_client_plaintext_auth() && (*pass)) {
1023                         DEBUG(1, ("Server requested plaintext password but "
1024                                   "'client plaintext auth' is disabled\n"));
1025                         return NT_STATUS_ACCESS_DENIED;
1026                 }
1027                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
1028         }
1029
1030         /* if the server supports extended security then use SPNEGO */
1031
1032         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
1033                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass,
1034                                                              workgroup, NULL);
1035                 if (!ADS_ERR_OK(status)) {
1036                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
1037                         return ads_ntstatus(status);
1038                 }
1039         } else {
1040                 NTSTATUS status;
1041
1042                 /* otherwise do a NT1 style session setup */
1043                 status = cli_session_setup_nt1(cli, user, pass, passlen,
1044                                                ntpass, ntpasslen, workgroup);
1045                 if (!NT_STATUS_IS_OK(status)) {
1046                         DEBUG(3,("cli_session_setup: NT1 session setup "
1047                                  "failed: %s\n", nt_errstr(status)));
1048                         return status;
1049                 }
1050         }
1051
1052         if (strstr(cli->server_type, "Samba")) {
1053                 cli->is_samba = True;
1054         }
1055
1056         return NT_STATUS_OK;
1057 }
1058
1059 /****************************************************************************
1060  Send a uloggoff.
1061 *****************************************************************************/
1062
1063 bool cli_ulogoff(struct cli_state *cli)
1064 {
1065         memset(cli->outbuf,'\0',smb_size);
1066         cli_set_message(cli->outbuf,2,0,True);
1067         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
1068         cli_setup_packet(cli);
1069         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1070         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
1071
1072         cli_send_smb(cli);
1073         if (!cli_receive_smb(cli))
1074                 return False;
1075
1076         if (cli_is_error(cli)) {
1077                 return False;
1078         }
1079
1080         cli->cnum = -1;
1081         return True;
1082 }
1083
1084 /****************************************************************************
1085  Send a tconX.
1086 ****************************************************************************/
1087
1088 bool cli_send_tconX(struct cli_state *cli,
1089                     const char *share, const char *dev, const char *pass, int passlen)
1090 {
1091         fstring fullshare, pword;
1092         char *p;
1093         memset(cli->outbuf,'\0',smb_size);
1094         memset(cli->inbuf,'\0',smb_size);
1095
1096         fstrcpy(cli->share, share);
1097
1098         /* in user level security don't send a password now */
1099         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1100                 passlen = 1;
1101                 pass = "";
1102         } else if (!pass) {
1103                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1104                 return False;
1105         }
1106
1107         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1108             *pass && passlen != 24) {
1109                 if (!lp_client_lanman_auth()) {
1110                         DEBUG(1, ("Server requested LANMAN password "
1111                                   "(share-level security) but "
1112                                   "'client lanman auth' is disabled\n"));
1113                         return False;
1114                 }
1115
1116                 /*
1117                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1118                  */
1119                 passlen = 24;
1120                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1121         } else {
1122                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1123                         if (!lp_client_plaintext_auth() && (*pass)) {
1124                                 DEBUG(1, ("Server requested plaintext "
1125                                           "password but 'client plaintext "
1126                                           "auth' is disabled\n"));
1127                                 return False;
1128                         }
1129
1130                         /*
1131                          * Non-encrypted passwords - convert to DOS codepage before using.
1132                          */
1133                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1134
1135                 } else {
1136                         if (passlen) {
1137                                 memcpy(pword, pass, passlen);
1138                         }
1139                 }
1140         }
1141
1142         slprintf(fullshare, sizeof(fullshare)-1,
1143                  "\\\\%s\\%s", cli->desthost, share);
1144
1145         cli_set_message(cli->outbuf,4, 0, True);
1146         SCVAL(cli->outbuf,smb_com,SMBtconX);
1147         cli_setup_packet(cli);
1148
1149         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1150         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1151         SSVAL(cli->outbuf,smb_vwv3,passlen);
1152
1153         p = smb_buf(cli->outbuf);
1154         if (passlen) {
1155                 memcpy(p,pword,passlen);
1156         }
1157         p += passlen;
1158         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1159         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1160
1161         cli_setup_bcc(cli, p);
1162
1163         cli_send_smb(cli);
1164         if (!cli_receive_smb(cli))
1165                 return False;
1166
1167         if (cli_is_error(cli))
1168                 return False;
1169
1170         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1171
1172         if (cli->protocol >= PROTOCOL_NT1 &&
1173             smb_buflen(cli->inbuf) == 3) {
1174                 /* almost certainly win95 - enable bug fixes */
1175                 cli->win95 = True;
1176         }
1177
1178         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1179         /* Avoids issues when connecting to Win9x boxes sharing files */
1180
1181         cli->dfsroot = False;
1182         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1183                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1184
1185         cli->cnum = SVAL(cli->inbuf,smb_tid);
1186         return True;
1187 }
1188
1189 /****************************************************************************
1190  Send a tree disconnect.
1191 ****************************************************************************/
1192
1193 bool cli_tdis(struct cli_state *cli)
1194 {
1195         memset(cli->outbuf,'\0',smb_size);
1196         cli_set_message(cli->outbuf,0,0,True);
1197         SCVAL(cli->outbuf,smb_com,SMBtdis);
1198         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1199         cli_setup_packet(cli);
1200
1201         cli_send_smb(cli);
1202         if (!cli_receive_smb(cli))
1203                 return False;
1204
1205         if (cli_is_error(cli)) {
1206                 return False;
1207         }
1208
1209         cli->cnum = -1;
1210         return True;
1211 }
1212
1213 /****************************************************************************
1214  Send a negprot command.
1215 ****************************************************************************/
1216
1217 void cli_negprot_send(struct cli_state *cli)
1218 {
1219         char *p;
1220         int numprots;
1221
1222         if (cli->protocol < PROTOCOL_NT1)
1223                 cli->use_spnego = False;
1224
1225         memset(cli->outbuf,'\0',smb_size);
1226
1227         /* setup the protocol strings */
1228         cli_set_message(cli->outbuf,0,0,True);
1229
1230         p = smb_buf(cli->outbuf);
1231         for (numprots=0;
1232              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1233              numprots++) {
1234                 *p++ = 2;
1235                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1236         }
1237
1238         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1239         cli_setup_bcc(cli, p);
1240         cli_setup_packet(cli);
1241
1242         SCVAL(smb_buf(cli->outbuf),0,2);
1243
1244         cli_send_smb(cli);
1245 }
1246
1247 /****************************************************************************
1248  Send a negprot command.
1249 ****************************************************************************/
1250
1251 bool cli_negprot(struct cli_state *cli)
1252 {
1253         char *p;
1254         int numprots;
1255         int plength;
1256
1257         if (cli->protocol < PROTOCOL_NT1)
1258                 cli->use_spnego = False;
1259
1260         memset(cli->outbuf,'\0',smb_size);
1261
1262         /* setup the protocol strings */
1263         for (plength=0,numprots=0;
1264              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1265              numprots++)
1266                 plength += strlen(prots[numprots].name)+2;
1267
1268         cli_set_message(cli->outbuf,0,plength,True);
1269
1270         p = smb_buf(cli->outbuf);
1271         for (numprots=0;
1272              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1273              numprots++) {
1274                 *p++ = 2;
1275                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1276         }
1277
1278         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1279         cli_setup_packet(cli);
1280
1281         SCVAL(smb_buf(cli->outbuf),0,2);
1282
1283         cli_send_smb(cli);
1284         if (!cli_receive_smb(cli))
1285                 return False;
1286
1287         show_msg(cli->inbuf);
1288
1289         if (cli_is_error(cli) ||
1290             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1291                 return(False);
1292         }
1293
1294         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1295
1296         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1297                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1298                 return False;
1299         }
1300
1301         if (cli->protocol >= PROTOCOL_NT1) {
1302                 struct timespec ts;
1303                 /* NT protocol */
1304                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1305                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1306                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1307                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1308                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1309                 cli->serverzone *= 60;
1310                 /* this time arrives in real GMT */
1311                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1312                 cli->servertime = ts.tv_sec;
1313                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1314                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1315                 if (cli->capabilities & CAP_RAW_MODE) {
1316                         cli->readbraw_supported = True;
1317                         cli->writebraw_supported = True;
1318                 }
1319                 /* work out if they sent us a workgroup */
1320                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1321                     smb_buflen(cli->inbuf) > 8) {
1322                         clistr_pull(cli, cli->server_domain,
1323                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1324                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1325                 }
1326
1327                 /*
1328                  * As signing is slow we only turn it on if either the client or
1329                  * the server require it. JRA.
1330                  */
1331
1332                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1333                         /* Fail if server says signing is mandatory and we don't want to support it. */
1334                         if (!cli->sign_info.allow_smb_signing) {
1335                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1336                                 return False;
1337                         }
1338                         cli->sign_info.negotiated_smb_signing = True;
1339                         cli->sign_info.mandatory_signing = True;
1340                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1341                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1342                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1343                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1344                                 return False;
1345                         }
1346                         cli->sign_info.negotiated_smb_signing = True;
1347                         cli->sign_info.mandatory_signing = True;
1348                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1349                         cli->sign_info.negotiated_smb_signing = True;
1350                 }
1351
1352                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1353                         SAFE_FREE(cli->outbuf);
1354                         SAFE_FREE(cli->inbuf);
1355                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+LARGE_WRITEX_HDR_SIZE+SAFETY_MARGIN);
1356                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+LARGE_WRITEX_HDR_SIZE+SAFETY_MARGIN);
1357                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE + LARGE_WRITEX_HDR_SIZE;
1358                 }
1359
1360         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1361                 cli->use_spnego = False;
1362                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1363                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1364                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1365                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1366                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1367                 cli->serverzone *= 60;
1368                 /* this time is converted to GMT by make_unix_date */
1369                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1370                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1371                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1372                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1373         } else {
1374                 /* the old core protocol */
1375                 cli->use_spnego = False;
1376                 cli->sec_mode = 0;
1377                 cli->serverzone = get_time_zone(time(NULL));
1378         }
1379
1380         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1381
1382         /* a way to force ascii SMB */
1383         if (getenv("CLI_FORCE_ASCII"))
1384                 cli->capabilities &= ~CAP_UNICODE;
1385
1386         return True;
1387 }
1388
1389 /****************************************************************************
1390  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1391 ****************************************************************************/
1392
1393 bool cli_session_request(struct cli_state *cli,
1394                          struct nmb_name *calling, struct nmb_name *called)
1395 {
1396         char *p;
1397         int len = 4;
1398
1399         memcpy(&(cli->calling), calling, sizeof(*calling));
1400         memcpy(&(cli->called ), called , sizeof(*called ));
1401
1402         /* put in the destination name */
1403         p = cli->outbuf+len;
1404         name_mangle(cli->called .name, p, cli->called .name_type);
1405         len += name_len(p);
1406
1407         /* and my name */
1408         p = cli->outbuf+len;
1409         name_mangle(cli->calling.name, p, cli->calling.name_type);
1410         len += name_len(p);
1411
1412         /* 445 doesn't have session request */
1413         if (cli->port == 445)
1414                 return True;
1415
1416         /* send a session request (RFC 1002) */
1417         /* setup the packet length
1418          * Remove four bytes from the length count, since the length
1419          * field in the NBT Session Service header counts the number
1420          * of bytes which follow.  The cli_send_smb() function knows
1421          * about this and accounts for those four bytes.
1422          * CRH.
1423          */
1424         len -= 4;
1425         _smb_setlen(cli->outbuf,len);
1426         SCVAL(cli->outbuf,0,0x81);
1427
1428         cli_send_smb(cli);
1429         DEBUG(5,("Sent session request\n"));
1430
1431         if (!cli_receive_smb(cli))
1432                 return False;
1433
1434         if (CVAL(cli->inbuf,0) == 0x84) {
1435                 /* C. Hoch  9/14/95 Start */
1436                 /* For information, here is the response structure.
1437                  * We do the byte-twiddling to for portability.
1438                 struct RetargetResponse{
1439                 unsigned char type;
1440                 unsigned char flags;
1441                 int16 length;
1442                 int32 ip_addr;
1443                 int16 port;
1444                 };
1445                 */
1446                 uint16_t port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1447                 struct in_addr dest_ip;
1448
1449                 /* SESSION RETARGET */
1450                 putip((char *)&dest_ip,cli->inbuf+4);
1451                 in_addr_to_sockaddr_storage(&cli->dest_ss, dest_ip);
1452
1453                 cli->fd = open_socket_out(SOCK_STREAM,
1454                                 &cli->dest_ss,
1455                                 port,
1456                                 LONG_CONNECT_TIMEOUT);
1457                 if (cli->fd == -1)
1458                         return False;
1459
1460                 DEBUG(3,("Retargeted\n"));
1461
1462                 set_socket_options(cli->fd, lp_socket_options());
1463
1464                 /* Try again */
1465                 {
1466                         static int depth;
1467                         bool ret;
1468                         if (depth > 4) {
1469                                 DEBUG(0,("Retarget recursion - failing\n"));
1470                                 return False;
1471                         }
1472                         depth++;
1473                         ret = cli_session_request(cli, calling, called);
1474                         depth--;
1475                         return ret;
1476                 }
1477         } /* C. Hoch 9/14/95 End */
1478
1479         if (CVAL(cli->inbuf,0) != 0x82) {
1480                 /* This is the wrong place to put the error... JRA. */
1481                 cli->rap_error = CVAL(cli->inbuf,4);
1482                 return False;
1483         }
1484         return(True);
1485 }
1486
1487 /****************************************************************************
1488  Open the client sockets.
1489 ****************************************************************************/
1490
1491 NTSTATUS cli_connect(struct cli_state *cli,
1492                 const char *host,
1493                 struct sockaddr_storage *dest_ss)
1494
1495 {
1496         int name_type = 0x20;
1497         TALLOC_CTX *frame = talloc_stackframe();
1498         unsigned int num_addrs = 0;
1499         unsigned int i = 0;
1500         struct sockaddr_storage *ss_arr = NULL;
1501         char *p = NULL;
1502
1503         /* reasonable default hostname */
1504         if (!host) {
1505                 host = star_smbserver_name;
1506         }
1507
1508         fstrcpy(cli->desthost, host);
1509
1510         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1511         if ((p = strchr(cli->desthost, '#'))) {
1512                 name_type = strtol(p+1, NULL, 16);
1513                 *p = 0;
1514         }
1515
1516         if (!dest_ss || is_zero_addr(dest_ss)) {
1517                 NTSTATUS status =resolve_name_list(frame,
1518                                         cli->desthost,
1519                                         name_type,
1520                                         &ss_arr,
1521                                         &num_addrs);
1522                 if (!NT_STATUS_IS_OK(status)) {
1523                         TALLOC_FREE(frame);
1524                         return NT_STATUS_BAD_NETWORK_NAME;
1525                 }
1526         } else {
1527                 num_addrs = 1;
1528                 ss_arr = TALLOC_P(frame, struct sockaddr_storage);
1529                 if (!ss_arr) {
1530                         TALLOC_FREE(frame);
1531                         return NT_STATUS_NO_MEMORY;
1532                 }
1533                 *ss_arr = *dest_ss;
1534         }
1535
1536         for (i = 0; i < num_addrs; i++) {
1537                 cli->dest_ss = ss_arr[i];
1538                 if (getenv("LIBSMB_PROG")) {
1539                         cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1540                 } else {
1541                         /* try 445 first, then 139 */
1542                         uint16_t port = cli->port?cli->port:445;
1543                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1544                                                   port, cli->timeout);
1545                         if (cli->fd == -1 && cli->port == 0) {
1546                                 port = 139;
1547                                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ss,
1548                                                           port, cli->timeout);
1549                         }
1550                         if (cli->fd != -1) {
1551                                 cli->port = port;
1552                         }
1553                 }
1554                 if (cli->fd == -1) {
1555                         char addr[INET6_ADDRSTRLEN];
1556                         print_sockaddr(addr, sizeof(addr), &ss_arr[i]);
1557                         DEBUG(2,("Error connecting to %s (%s)\n",
1558                                  dest_ss?addr:host,strerror(errno)));
1559                 } else {
1560                         /* Exit from loop on first connection. */
1561                         break;
1562                 }
1563         }
1564
1565         if (cli->fd == -1) {
1566                 TALLOC_FREE(frame);
1567                 return map_nt_error_from_unix(errno);
1568         }
1569
1570         if (dest_ss) {
1571                 *dest_ss = cli->dest_ss;
1572         }
1573
1574         set_socket_options(cli->fd, lp_socket_options());
1575
1576         TALLOC_FREE(frame);
1577         return NT_STATUS_OK;
1578 }
1579
1580 /**
1581    establishes a connection to after the negprot.
1582    @param output_cli A fully initialised cli structure, non-null only on success
1583    @param dest_host The netbios name of the remote host
1584    @param dest_ss (optional) The the destination IP, NULL for name based lookup
1585    @param port (optional) The destination port (0 for default)
1586    @param retry bool. Did this connection fail with a retryable error ?
1587
1588 */
1589 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1590                               const char *my_name,
1591                               const char *dest_host,
1592                               struct sockaddr_storage *dest_ss, int port,
1593                               int signing_state, int flags,
1594                               bool *retry)
1595 {
1596         NTSTATUS nt_status;
1597         struct nmb_name calling;
1598         struct nmb_name called;
1599         struct cli_state *cli;
1600         struct sockaddr_storage ss;
1601
1602         if (retry)
1603                 *retry = False;
1604
1605         if (!my_name)
1606                 my_name = global_myname();
1607
1608         if (!(cli = cli_initialise())) {
1609                 return NT_STATUS_NO_MEMORY;
1610         }
1611
1612         make_nmb_name(&calling, my_name, 0x0);
1613         make_nmb_name(&called , dest_host, 0x20);
1614
1615         if (cli_set_port(cli, port) != port) {
1616                 cli_shutdown(cli);
1617                 return NT_STATUS_UNSUCCESSFUL;
1618         }
1619
1620         cli_set_timeout(cli, 10000); /* 10 seconds. */
1621
1622         if (dest_ss) {
1623                 ss = *dest_ss;
1624         } else {
1625                 zero_addr(&ss);
1626         }
1627
1628 again:
1629
1630         DEBUG(3,("Connecting to host=%s\n", dest_host));
1631
1632         nt_status = cli_connect(cli, dest_host, &ss);
1633         if (!NT_STATUS_IS_OK(nt_status)) {
1634                 char addr[INET6_ADDRSTRLEN];
1635                 print_sockaddr(addr, sizeof(addr), &ss);
1636                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s). Error %s\n",
1637                          nmb_namestr(&called), addr, nt_errstr(nt_status) ));
1638                 cli_shutdown(cli);
1639                 return nt_status;
1640         }
1641
1642         if (retry)
1643                 *retry = True;
1644
1645         if (!cli_session_request(cli, &calling, &called)) {
1646                 char *p;
1647                 DEBUG(1,("session request to %s failed (%s)\n",
1648                          called.name, cli_errstr(cli)));
1649                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1650                         *p = 0;
1651                         goto again;
1652                 }
1653                 if (strcmp(called.name, star_smbserver_name)) {
1654                         make_nmb_name(&called , star_smbserver_name, 0x20);
1655                         goto again;
1656                 }
1657                 return NT_STATUS_BAD_NETWORK_NAME;
1658         }
1659
1660         cli_setup_signing_state(cli, signing_state);
1661
1662         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1663                 cli->use_spnego = False;
1664         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1665                 cli->use_kerberos = True;
1666
1667         if ((flags & CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS) &&
1668              cli->use_kerberos) {
1669                 cli->fallback_after_kerberos = true;
1670         }
1671
1672         if (!cli_negprot(cli)) {
1673                 DEBUG(1,("failed negprot\n"));
1674                 nt_status = cli_nt_error(cli);
1675                 if (NT_STATUS_IS_OK(nt_status)) {
1676                         nt_status = NT_STATUS_UNSUCCESSFUL;
1677                 }
1678                 cli_shutdown(cli);
1679                 return nt_status;
1680         }
1681
1682         *output_cli = cli;
1683         return NT_STATUS_OK;
1684 }
1685
1686
1687 /**
1688    establishes a connection right up to doing tconX, password specified.
1689    @param output_cli A fully initialised cli structure, non-null only on success
1690    @param dest_host The netbios name of the remote host
1691    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1692    @param port (optional) The destination port (0 for default)
1693    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1694    @param service_type The 'type' of serivice.
1695    @param user Username, unix string
1696    @param domain User's domain
1697    @param password User's password, unencrypted unix string.
1698    @param retry bool. Did this connection fail with a retryable error ?
1699 */
1700
1701 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1702                              const char *my_name,
1703                              const char *dest_host,
1704                              struct sockaddr_storage *dest_ss, int port,
1705                              const char *service, const char *service_type,
1706                              const char *user, const char *domain,
1707                              const char *password, int flags,
1708                              int signing_state,
1709                              bool *retry)
1710 {
1711         NTSTATUS nt_status;
1712         struct cli_state *cli = NULL;
1713         int pw_len = password ? strlen(password)+1 : 0;
1714
1715         *output_cli = NULL;
1716
1717         if (password == NULL) {
1718                 password = "";
1719         }
1720
1721         nt_status = cli_start_connection(&cli, my_name, dest_host,
1722                                          dest_ss, port, signing_state,
1723                                          flags, retry);
1724
1725         if (!NT_STATUS_IS_OK(nt_status)) {
1726                 return nt_status;
1727         }
1728
1729         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1730                                       pw_len, domain);
1731         if (!NT_STATUS_IS_OK(nt_status)) {
1732
1733                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1734                         DEBUG(1,("failed session setup with %s\n",
1735                                  nt_errstr(nt_status)));
1736                         cli_shutdown(cli);
1737                         return nt_status;
1738                 }
1739
1740                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1741                 if (!NT_STATUS_IS_OK(nt_status)) {
1742                         DEBUG(1,("anonymous failed session setup with %s\n",
1743                                  nt_errstr(nt_status)));
1744                         cli_shutdown(cli);
1745                         return nt_status;
1746                 }
1747         }
1748
1749         if (service) {
1750                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1751                         nt_status = cli_nt_error(cli);
1752                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1753                         cli_shutdown(cli);
1754                         if (NT_STATUS_IS_OK(nt_status)) {
1755                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1756                         }
1757                         return nt_status;
1758                 }
1759         }
1760
1761         cli_init_creds(cli, user, domain, password);
1762
1763         *output_cli = cli;
1764         return NT_STATUS_OK;
1765 }
1766
1767 /****************************************************************************
1768  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1769 ****************************************************************************/
1770
1771 bool attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1772                                      struct sockaddr_storage *pdest_ss)
1773 {
1774         struct nmb_name calling, called;
1775
1776         make_nmb_name(&calling, srchost, 0x0);
1777
1778         /*
1779          * If the called name is an IP address
1780          * then use *SMBSERVER immediately.
1781          */
1782
1783         if(is_ipaddress(desthost)) {
1784                 make_nmb_name(&called, star_smbserver_name, 0x20);
1785         } else {
1786                 make_nmb_name(&called, desthost, 0x20);
1787         }
1788
1789         if (!cli_session_request(*ppcli, &calling, &called)) {
1790                 NTSTATUS status;
1791                 struct nmb_name smbservername;
1792
1793                 make_nmb_name(&smbservername, star_smbserver_name, 0x20);
1794
1795                 /*
1796                  * If the name wasn't *SMBSERVER then
1797                  * try with *SMBSERVER if the first name fails.
1798                  */
1799
1800                 if (nmb_name_equal(&called, &smbservername)) {
1801
1802                         /*
1803                          * The name used was *SMBSERVER, don't bother with another name.
1804                          */
1805
1806                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1807 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1808                         return False;
1809                 }
1810
1811                 /* Try again... */
1812                 cli_shutdown(*ppcli);
1813
1814                 *ppcli = cli_initialise();
1815                 if (!*ppcli) {
1816                         /* Out of memory... */
1817                         return False;
1818                 }
1819
1820                 status = cli_connect(*ppcli, desthost, pdest_ss);
1821                 if (!NT_STATUS_IS_OK(status) ||
1822                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1823                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1824 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1825                         return False;
1826                 }
1827         }
1828
1829         return True;
1830 }
1831
1832 /****************************************************************************
1833  Send an old style tcon.
1834 ****************************************************************************/
1835 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1836                       const char *service, const char *pass, const char *dev,
1837                       uint16 *max_xmit, uint16 *tid)
1838 {
1839         char *p;
1840
1841         if (!lp_client_plaintext_auth() && (*pass)) {
1842                 DEBUG(1, ("Server requested plaintext password but 'client "
1843                           "plaintext auth' is disabled\n"));
1844                 return NT_STATUS_ACCESS_DENIED;
1845         }
1846
1847         memset(cli->outbuf,'\0',smb_size);
1848         memset(cli->inbuf,'\0',smb_size);
1849
1850         cli_set_message(cli->outbuf, 0, 0, True);
1851         SCVAL(cli->outbuf,smb_com,SMBtcon);
1852         cli_setup_packet(cli);
1853
1854         p = smb_buf(cli->outbuf);
1855         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1856         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1857         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1858
1859         cli_setup_bcc(cli, p);
1860
1861         cli_send_smb(cli);
1862         if (!cli_receive_smb(cli)) {
1863                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1864         }
1865
1866         if (cli_is_error(cli)) {
1867                 return cli_nt_error(cli);
1868         }
1869
1870         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1871         *tid = SVAL(cli->inbuf, smb_vwv1);
1872
1873         return NT_STATUS_OK;
1874 }
1875
1876 /* Return a cli_state pointing at the IPC$ share for the given server */
1877
1878 struct cli_state *get_ipc_connect(char *server,
1879                                 struct sockaddr_storage *server_ss,
1880                                 const struct user_auth_info *user_info)
1881 {
1882         struct cli_state *cli;
1883         NTSTATUS nt_status;
1884         uint32_t flags = CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK;
1885
1886         if (user_info->use_kerberos) {
1887                 flags |= CLI_FULL_CONNECTION_USE_KERBEROS;
1888         }
1889
1890         nt_status = cli_full_connection(&cli, NULL, server, server_ss, 0, "IPC$", "IPC",
1891                                         user_info->username ? user_info->username : "",
1892                                         lp_workgroup(),
1893                                         user_info->password ? user_info->password : "",
1894                                         flags,
1895                                         Undefined, NULL);
1896
1897         if (NT_STATUS_IS_OK(nt_status)) {
1898                 return cli;
1899         } else if (is_ipaddress(server)) {
1900             /* windows 9* needs a correct NMB name for connections */
1901             fstring remote_name;
1902
1903             if (name_status_find("*", 0, 0, server_ss, remote_name)) {
1904                 cli = get_ipc_connect(remote_name, server_ss, user_info);
1905                 if (cli)
1906                     return cli;
1907             }
1908         }
1909         return NULL;
1910 }
1911
1912 /*
1913  * Given the IP address of a master browser on the network, return its
1914  * workgroup and connect to it.
1915  *
1916  * This function is provided to allow additional processing beyond what
1917  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1918  * browsers and obtain each master browsers' list of domains (in case the
1919  * first master browser is recently on the network and has not yet
1920  * synchronized with other master browsers and therefore does not yet have the
1921  * entire network browse list)
1922  */
1923
1924 struct cli_state *get_ipc_connect_master_ip(TALLOC_CTX *ctx,
1925                                 struct ip_service *mb_ip,
1926                                 const struct user_auth_info *user_info,
1927                                 char **pp_workgroup_out)
1928 {
1929         char addr[INET6_ADDRSTRLEN];
1930         fstring name;
1931         struct cli_state *cli;
1932         struct sockaddr_storage server_ss;
1933
1934         *pp_workgroup_out = NULL;
1935
1936         print_sockaddr(addr, sizeof(addr), &mb_ip->ss);
1937         DEBUG(99, ("Looking up name of master browser %s\n",
1938                    addr));
1939
1940         /*
1941          * Do a name status query to find out the name of the master browser.
1942          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1943          * master browser will not respond to a wildcard query (or, at least,
1944          * an NT4 server acting as the domain master browser will not).
1945          *
1946          * We might be able to use ONLY the query on MSBROWSE, but that's not
1947          * yet been tested with all Windows versions, so until it is, leave
1948          * the original wildcard query as the first choice and fall back to
1949          * MSBROWSE if the wildcard query fails.
1950          */
1951         if (!name_status_find("*", 0, 0x1d, &mb_ip->ss, name) &&
1952             !name_status_find(MSBROWSE, 1, 0x1d, &mb_ip->ss, name)) {
1953
1954                 DEBUG(99, ("Could not retrieve name status for %s\n",
1955                            addr));
1956                 return NULL;
1957         }
1958
1959         if (!find_master_ip(name, &server_ss)) {
1960                 DEBUG(99, ("Could not find master ip for %s\n", name));
1961                 return NULL;
1962         }
1963
1964         *pp_workgroup_out = talloc_strdup(ctx, name);
1965
1966         DEBUG(4, ("found master browser %s, %s\n", name, addr));
1967
1968         print_sockaddr(addr, sizeof(addr), &server_ss);
1969         cli = get_ipc_connect(addr, &server_ss, user_info);
1970
1971         return cli;
1972 }
1973
1974 /*
1975  * Return the IP address and workgroup of a master browser on the network, and
1976  * connect to it.
1977  */
1978
1979 struct cli_state *get_ipc_connect_master_ip_bcast(TALLOC_CTX *ctx,
1980                                         const struct user_auth_info *user_info,
1981                                         char **pp_workgroup_out)
1982 {
1983         struct ip_service *ip_list;
1984         struct cli_state *cli;
1985         int i, count;
1986
1987         *pp_workgroup_out = NULL;
1988
1989         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1990
1991         /* Go looking for workgroups by broadcasting on the local network */
1992
1993         if (!NT_STATUS_IS_OK(name_resolve_bcast(MSBROWSE, 1, &ip_list,
1994                                                 &count))) {
1995                 DEBUG(99, ("No master browsers responded\n"));
1996                 return False;
1997         }
1998
1999         for (i = 0; i < count; i++) {
2000                 char addr[INET6_ADDRSTRLEN];
2001                 print_sockaddr(addr, sizeof(addr), &ip_list[i].ss);
2002                 DEBUG(99, ("Found master browser %s\n", addr));
2003
2004                 cli = get_ipc_connect_master_ip(ctx, &ip_list[i],
2005                                 user_info, pp_workgroup_out);
2006                 if (cli)
2007                         return(cli);
2008         }
2009
2010         return NULL;
2011 }