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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern pstring user_socket_options;
  25
  26 static const struct {
  27         int prot;
  28         const char *name;
  29 } prots[] = {
  30         {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
  31         {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
  32         {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
  33         {PROTOCOL_LANMAN1,"LANMAN1.0"},
  34         {PROTOCOL_LANMAN2,"LM1.2X002"},
  35         {PROTOCOL_LANMAN2,"DOS LANMAN2.1"},
  36         {PROTOCOL_LANMAN2,"LANMAN2.1"},
  37         {PROTOCOL_LANMAN2,"Samba"},
  38         {PROTOCOL_NT1,"NT LANMAN 1.0"},
  39         {PROTOCOL_NT1,"NT LM 0.12"},
  40         {-1,NULL}
  41 };
  42
  43 /**
  44  * Set the user session key for a connection
  45  * @param cli The cli structure to add it too
  46  * @param session_key The session key used.  (A copy of this is taken for the cli struct)
  47  *
  48  */
  49
  50 static void cli_set_session_key (struct cli_state *cli, const DATA_BLOB session_key)
  51 {
  52         cli->user_session_key = data_blob(session_key.data, session_key.length);
  53 }
  54
  55 /****************************************************************************
  56  Do an old lanman2 style session setup.
  57 ****************************************************************************/
  58
  59 static NTSTATUS cli_session_setup_lanman2(struct cli_state *cli,
  60                                           const char *user,
  61                                           const char *pass, size_t passlen,
  62                                           const char *workgroup)
  63 {
  64         DATA_BLOB session_key = data_blob(NULL, 0);
  65         DATA_BLOB lm_response = data_blob(NULL, 0);
  66         fstring pword;
  67         char *p;
  68
  69         if (passlen > sizeof(pword)-1) {
  70                 return NT_STATUS_INVALID_PARAMETER;
  71         }
  72
  73         /* LANMAN servers predate NT status codes and Unicode and ignore those
  74            smb flags so we must disable the corresponding default capabilities
  75            that would otherwise cause the Unicode and NT Status flags to be
  76            set (and even returned by the server) */
  77
  78         cli->capabilities &= ~(CAP_UNICODE | CAP_STATUS32);
  79
  80         /* if in share level security then don't send a password now */
  81         if (!(cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL))
  82                 passlen = 0;
  83
  84         if (passlen > 0 && (cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen != 24) {
  85                 /* Encrypted mode needed, and non encrypted password supplied. */
  86                 lm_response = data_blob(NULL, 24);
  87                 if (!SMBencrypt(pass, cli->secblob.data,(uchar *)lm_response.data)) {
  88                         DEBUG(1, ("Password is > 14 chars in length, and is therefore incompatible with Lanman authentication\n"));
  89                         return NT_STATUS_ACCESS_DENIED;
  90                 }
  91         } else if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) && passlen == 24) {
  92                 /* Encrypted mode needed, and encrypted password supplied. */
  93                 lm_response = data_blob(pass, passlen);
  94         } else if (passlen > 0) {
  95                 /* Plaintext mode needed, assume plaintext supplied. */
  96                 passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
  97                 lm_response = data_blob(pass, passlen);
  98         }
  99
 100         /* send a session setup command */
 101         memset(cli->outbuf,'\0',smb_size);
 102         set_message(NULL,cli->outbuf,10, 0, True);
 103         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 104         cli_setup_packet(cli);
 105
 106         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 107         SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
 108         SSVAL(cli->outbuf,smb_vwv3,2);
 109         SSVAL(cli->outbuf,smb_vwv4,1);
 110         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 111         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 112
 113         p = smb_buf(cli->outbuf);
 114         memcpy(p,lm_response.data,lm_response.length);
 115         p += lm_response.length;
 116         p += clistr_push(cli, p, user, -1, STR_TERMINATE|STR_UPPER);
 117         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 118         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 119         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 120         cli_setup_bcc(cli, p);
 121
 122         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 123                 return cli_nt_error(cli);
 124         }
 125
 126         show_msg(cli->inbuf);
 127
 128         if (cli_is_error(cli)) {
 129                 return cli_nt_error(cli);
 130         }
 131
 132         /* use the returned vuid from now on */
 133         cli->vuid = SVAL(cli->inbuf,smb_uid);
 134         fstrcpy(cli->user_name, user);
 135
 136         if (session_key.data) {
 137                 /* Have plaintext orginal */
 138                 cli_set_session_key(cli, session_key);
 139         }
 140
 141         return NT_STATUS_OK;
 142 }
 143
 144 /****************************************************************************
 145  Work out suitable capabilities to offer the server.
 146 ****************************************************************************/
 147
 148 static uint32 cli_session_setup_capabilities(struct cli_state *cli)
 149 {
 150         uint32 capabilities = CAP_NT_SMBS;
 151
 152         if (!cli->force_dos_errors)
 153                 capabilities |= CAP_STATUS32;
 154
 155         if (cli->use_level_II_oplocks)
 156                 capabilities |= CAP_LEVEL_II_OPLOCKS;
 157
 158         capabilities |= (cli->capabilities & (CAP_UNICODE|CAP_LARGE_FILES|CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_DFS));
 159         return capabilities;
 160 }
 161
 162 /****************************************************************************
 163  Do a NT1 guest session setup.
 164 ****************************************************************************/
 165
 166 static NTSTATUS cli_session_setup_guest(struct cli_state *cli)
 167 {
 168         char *p;
 169         uint32 capabilities = cli_session_setup_capabilities(cli);
 170
 171         memset(cli->outbuf, '\0', smb_size);
 172         set_message(NULL,cli->outbuf,13,0,True);
 173         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 174         cli_setup_packet(cli);
 175
 176         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 177         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 178         SSVAL(cli->outbuf,smb_vwv3,2);
 179         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 180         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 181         SSVAL(cli->outbuf,smb_vwv7,0);
 182         SSVAL(cli->outbuf,smb_vwv8,0);
 183         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 184         p = smb_buf(cli->outbuf);
 185         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* username */
 186         p += clistr_push(cli, p, "", -1, STR_TERMINATE); /* workgroup */
 187         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 188         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 189         cli_setup_bcc(cli, p);
 190
 191         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 192                 return cli_nt_error(cli);
 193         }
 194
 195         show_msg(cli->inbuf);
 196
 197         if (cli_is_error(cli)) {
 198                 return cli_nt_error(cli);
 199         }
 200
 201         cli->vuid = SVAL(cli->inbuf,smb_uid);
 202
 203         p = smb_buf(cli->inbuf);
 204         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 205         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 206         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 207
 208         if (strstr(cli->server_type, "Samba")) {
 209                 cli->is_samba = True;
 210         }
 211
 212         fstrcpy(cli->user_name, "");
 213
 214         return NT_STATUS_OK;
 215 }
 216
 217 /****************************************************************************
 218  Do a NT1 plaintext session setup.
 219 ****************************************************************************/
 220
 221 static NTSTATUS cli_session_setup_plaintext(struct cli_state *cli,
 222                                             const char *user, const char *pass,
 223                                             const char *workgroup)
 224 {
 225         uint32 capabilities = cli_session_setup_capabilities(cli);
 226         char *p;
 227         fstring lanman;
 228
 229         fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 230
 231         memset(cli->outbuf, '\0', smb_size);
 232         set_message(NULL,cli->outbuf,13,0,True);
 233         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 234         cli_setup_packet(cli);
 235
 236         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 237         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 238         SSVAL(cli->outbuf,smb_vwv3,2);
 239         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 240         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 241         SSVAL(cli->outbuf,smb_vwv8,0);
 242         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 243         p = smb_buf(cli->outbuf);
 244
 245         /* check wether to send the ASCII or UNICODE version of the password */
 246
 247         if ( (capabilities & CAP_UNICODE) == 0 ) {
 248                 p += clistr_push(cli, p, pass, -1, STR_TERMINATE); /* password */
 249                 SSVAL(cli->outbuf,smb_vwv7,PTR_DIFF(p, smb_buf(cli->outbuf)));
 250         }
 251         else {
 252                 p += clistr_push(cli, p, pass, -1, STR_UNICODE|STR_TERMINATE); /* unicode password */
 253                 SSVAL(cli->outbuf,smb_vwv8,PTR_DIFF(p, smb_buf(cli->outbuf)));
 254         }
 255
 256         p += clistr_push(cli, p, user, -1, STR_TERMINATE); /* username */
 257         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE); /* workgroup */
 258         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 259         p += clistr_push(cli, p, lanman, -1, STR_TERMINATE);
 260         cli_setup_bcc(cli, p);
 261
 262         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 263                 return cli_nt_error(cli);
 264         }
 265
 266         show_msg(cli->inbuf);
 267
 268         if (cli_is_error(cli)) {
 269                 return cli_nt_error(cli);
 270         }
 271
 272         cli->vuid = SVAL(cli->inbuf,smb_uid);
 273         p = smb_buf(cli->inbuf);
 274         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 275         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 276         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 277         fstrcpy(cli->user_name, user);
 278
 279         if (strstr(cli->server_type, "Samba")) {
 280                 cli->is_samba = True;
 281         }
 282
 283         return NT_STATUS_OK;
 284 }
 285
 286 /****************************************************************************
 287    do a NT1 NTLM/LM encrypted session setup - for when extended security
 288    is not negotiated.
 289    @param cli client state to create do session setup on
 290    @param user username
 291    @param pass *either* cleartext password (passlen !=24) or LM response.
 292    @param ntpass NT response, implies ntpasslen >=24, implies pass is not clear
 293    @param workgroup The user's domain.
 294 ****************************************************************************/
 295
 296 static NTSTATUS cli_session_setup_nt1(struct cli_state *cli, const char *user,
 297                                       const char *pass, size_t passlen,
 298                                       const char *ntpass, size_t ntpasslen,
 299                                       const char *workgroup)
 300 {
 301         uint32 capabilities = cli_session_setup_capabilities(cli);
 302         DATA_BLOB lm_response = data_blob(NULL, 0);
 303         DATA_BLOB nt_response = data_blob(NULL, 0);
 304         DATA_BLOB session_key = data_blob(NULL, 0);
 305         NTSTATUS result;
 306         char *p;
 307
 308         if (passlen == 0) {
 309                 /* do nothing - guest login */
 310         } else if (passlen != 24) {
 311                 if (lp_client_ntlmv2_auth()) {
 312                         DATA_BLOB server_chal;
 313                         DATA_BLOB names_blob;
 314                         server_chal = data_blob(cli->secblob.data, MIN(cli->secblob.length, 8));
 315
 316                         /* note that the 'workgroup' here is a best guess - we don't know
 317                            the server's domain at this point.  The 'server name' is also
 318                            dodgy...
 319                         */
 320                         names_blob = NTLMv2_generate_names_blob(cli->called.name, workgroup);
 321
 322                         if (!SMBNTLMv2encrypt(user, workgroup, pass, &server_chal,
 323                                               &names_blob,
 324                                               &lm_response, &nt_response, &session_key)) {
 325                                 data_blob_free(&names_blob);
 326                                 data_blob_free(&server_chal);
 327                                 return NT_STATUS_ACCESS_DENIED;
 328                         }
 329                         data_blob_free(&names_blob);
 330                         data_blob_free(&server_chal);
 331
 332                 } else {
 333                         uchar nt_hash[16];
 334                         E_md4hash(pass, nt_hash);
 335
 336 #ifdef LANMAN_ONLY
 337                         nt_response = data_blob(NULL, 0);
 338 #else
 339                         nt_response = data_blob(NULL, 24);
 340                         SMBNTencrypt(pass,cli->secblob.data,nt_response.data);
 341 #endif
 342                         /* non encrypted password supplied. Ignore ntpass. */
 343                         if (lp_client_lanman_auth()) {
 344                                 lm_response = data_blob(NULL, 24);
 345                                 if (!SMBencrypt(pass,cli->secblob.data, lm_response.data)) {
 346                                         /* Oops, the LM response is invalid, just put
 347                                            the NT response there instead */
 348                                         data_blob_free(&lm_response);
 349                                         lm_response = data_blob(nt_response.data, nt_response.length);
 350                                 }
 351                         } else {
 352                                 /* LM disabled, place NT# in LM field instead */
 353                                 lm_response = data_blob(nt_response.data, nt_response.length);
 354                         }
 355
 356                         session_key = data_blob(NULL, 16);
 357 #ifdef LANMAN_ONLY
 358                         E_deshash(pass, session_key.data);
 359                         memset(&session_key.data[8], '\0', 8);
 360 #else
 361                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
 362 #endif
 363                 }
 364 #ifdef LANMAN_ONLY
 365                 cli_simple_set_signing(cli, session_key, lm_response);
 366 #else
 367                 cli_simple_set_signing(cli, session_key, nt_response);
 368 #endif
 369         } else {
 370                 /* pre-encrypted password supplied.  Only used for
 371                    security=server, can't do
 372                    signing because we don't have original key */
 373
 374                 lm_response = data_blob(pass, passlen);
 375                 nt_response = data_blob(ntpass, ntpasslen);
 376         }
 377
 378         /* send a session setup command */
 379         memset(cli->outbuf,'\0',smb_size);
 380
 381         set_message(NULL,cli->outbuf,13,0,True);
 382         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 383         cli_setup_packet(cli);
 384
 385         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 386         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 387         SSVAL(cli->outbuf,smb_vwv3,2);
 388         SSVAL(cli->outbuf,smb_vwv4,cli->pid);
 389         SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
 390         SSVAL(cli->outbuf,smb_vwv7,lm_response.length);
 391         SSVAL(cli->outbuf,smb_vwv8,nt_response.length);
 392         SIVAL(cli->outbuf,smb_vwv11,capabilities);
 393         p = smb_buf(cli->outbuf);
 394         if (lm_response.length) {
 395                 memcpy(p,lm_response.data, lm_response.length); p += lm_response.length;
 396         }
 397         if (nt_response.length) {
 398                 memcpy(p,nt_response.data, nt_response.length); p += nt_response.length;
 399         }
 400         p += clistr_push(cli, p, user, -1, STR_TERMINATE);
 401
 402         /* Upper case here might help some NTLMv2 implementations */
 403         p += clistr_push(cli, p, workgroup, -1, STR_TERMINATE|STR_UPPER);
 404         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 405         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 406         cli_setup_bcc(cli, p);
 407
 408         if (!cli_send_smb(cli) || !cli_receive_smb(cli)) {
 409                 result = cli_nt_error(cli);
 410                 goto end;
 411         }
 412
 413         /* show_msg(cli->inbuf); */
 414
 415         if (cli_is_error(cli)) {
 416                 result = cli_nt_error(cli);
 417                 goto end;
 418         }
 419
 420         /* use the returned vuid from now on */
 421         cli->vuid = SVAL(cli->inbuf,smb_uid);
 422
 423         p = smb_buf(cli->inbuf);
 424         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 425         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), -1, STR_TERMINATE);
 426         p += clistr_pull(cli, cli->server_domain, p, sizeof(fstring), -1, STR_TERMINATE);
 427
 428         if (strstr(cli->server_type, "Samba")) {
 429                 cli->is_samba = True;
 430         }
 431
 432         fstrcpy(cli->user_name, user);
 433
 434         if (session_key.data) {
 435                 /* Have plaintext orginal */
 436                 cli_set_session_key(cli, session_key);
 437         }
 438
 439         result = NT_STATUS_OK;
 440 end:
 441         data_blob_free(&lm_response);
 442         data_blob_free(&nt_response);
 443         data_blob_free(&session_key);
 444         return result;
 445 }
 446
 447 /****************************************************************************
 448  Send a extended security session setup blob
 449 ****************************************************************************/
 450
 451 static BOOL cli_session_setup_blob_send(struct cli_state *cli, DATA_BLOB blob)
 452 {
 453         uint32 capabilities = cli_session_setup_capabilities(cli);
 454         char *p;
 455
 456         capabilities |= CAP_EXTENDED_SECURITY;
 457
 458         /* send a session setup command */
 459         memset(cli->outbuf,'\0',smb_size);
 460
 461         set_message(NULL,cli->outbuf,12,0,True);
 462         SCVAL(cli->outbuf,smb_com,SMBsesssetupX);
 463
 464         cli_setup_packet(cli);
 465
 466         SCVAL(cli->outbuf,smb_vwv0,0xFF);
 467         SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
 468         SSVAL(cli->outbuf,smb_vwv3,2);
 469         SSVAL(cli->outbuf,smb_vwv4,1);
 470         SIVAL(cli->outbuf,smb_vwv5,0);
 471         SSVAL(cli->outbuf,smb_vwv7,blob.length);
 472         SIVAL(cli->outbuf,smb_vwv10,capabilities);
 473         p = smb_buf(cli->outbuf);
 474         memcpy(p, blob.data, blob.length);
 475         p += blob.length;
 476         p += clistr_push(cli, p, "Unix", -1, STR_TERMINATE);
 477         p += clistr_push(cli, p, "Samba", -1, STR_TERMINATE);
 478         cli_setup_bcc(cli, p);
 479         return cli_send_smb(cli);
 480 }
 481
 482 /****************************************************************************
 483  Send a extended security session setup blob, returning a reply blob.
 484 ****************************************************************************/
 485
 486 static DATA_BLOB cli_session_setup_blob_receive(struct cli_state *cli)
 487 {
 488         DATA_BLOB blob2 = data_blob(NULL, 0);
 489         char *p;
 490         size_t len;
 491
 492         if (!cli_receive_smb(cli))
 493                 return blob2;
 494
 495         show_msg(cli->inbuf);
 496
 497         if (cli_is_error(cli) && !NT_STATUS_EQUAL(cli_nt_error(cli),
 498                                                   NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 499                 return blob2;
 500         }
 501
 502         /* use the returned vuid from now on */
 503         cli->vuid = SVAL(cli->inbuf,smb_uid);
 504
 505         p = smb_buf(cli->inbuf);
 506
 507         blob2 = data_blob(p, SVAL(cli->inbuf, smb_vwv3));
 508
 509         p += blob2.length;
 510         p += clistr_pull(cli, cli->server_os, p, sizeof(fstring), -1, STR_TERMINATE);
 511
 512         /* w2k with kerberos doesn't properly null terminate this field */
 513         len = smb_buflen(cli->inbuf) - PTR_DIFF(p, smb_buf(cli->inbuf));
 514         p += clistr_pull(cli, cli->server_type, p, sizeof(fstring), len, 0);
 515
 516         return blob2;
 517 }
 518
 519 #ifdef HAVE_KRB5
 520 /****************************************************************************
 521  Send a extended security session setup blob, returning a reply blob.
 522 ****************************************************************************/
 523
 524 /* The following is calculated from :
 525  * (smb_size-4) = 35
 526  * (smb_wcnt * 2) = 24 (smb_wcnt == 12 in cli_session_setup_blob_send() )
 527  * (strlen("Unix") + 1 + strlen("Samba") + 1) * 2 = 22 (unicode strings at
 528  * end of packet.
 529  */
 530
 531 #define BASE_SESSSETUP_BLOB_PACKET_SIZE (35 + 24 + 22)
 532
 533 static BOOL cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob, DATA_BLOB session_key_krb5)
 534 {
 535         int32 remaining = blob.length;
 536         int32 cur = 0;
 537         DATA_BLOB send_blob = data_blob(NULL, 0);
 538         int32 max_blob_size = 0;
 539
 540         if (cli->max_xmit < BASE_SESSSETUP_BLOB_PACKET_SIZE + 1) {
 541                 DEBUG(0,("cli_session_setup_blob: cli->max_xmit too small "
 542                         "(was %u, need minimum %u)\n",
 543                         (unsigned int)cli->max_xmit,
 544                         BASE_SESSSETUP_BLOB_PACKET_SIZE));
 545                 cli_set_nt_error(cli, NT_STATUS_INVALID_PARAMETER);
 546                 return False;
 547         }
 548
 549         max_blob_size = cli->max_xmit - BASE_SESSSETUP_BLOB_PACKET_SIZE;
 550
 551         while ( remaining > 0) {
 552                 if (remaining >= max_blob_size) {
 553                         send_blob.length = max_blob_size;
 554                         remaining -= max_blob_size;
 555                 } else {
 556                         DATA_BLOB null_blob = data_blob(NULL, 0);
 557
 558                         send_blob.length = remaining;
 559                         remaining = 0;
 560
 561                         /* This is the last packet in the sequence - turn signing on. */
 562                         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 563                 }
 564
 565                 send_blob.data =  &blob.data[cur];
 566                 cur += send_blob.length;
 567
 568                 DEBUG(10, ("cli_session_setup_blob: Remaining (%u) sending (%u) current (%u)\n",
 569                         (unsigned int)remaining,
 570                         (unsigned int)send_blob.length,
 571                         (unsigned int)cur ));
 572
 573                 if (!cli_session_setup_blob_send(cli, send_blob)) {
 574                         DEBUG(0, ("cli_session_setup_blob: send failed\n"));
 575                         return False;
 576                 }
 577
 578                 cli_session_setup_blob_receive(cli);
 579
 580                 if (cli_is_error(cli) &&
 581                                 !NT_STATUS_EQUAL( cli_get_nt_error(cli),
 582                                         NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 583                         DEBUG(0, ("cli_session_setup_blob: recieve failed (%s)\n",
 584                                 nt_errstr(cli_get_nt_error(cli)) ));
 585                         return False;
 586                 }
 587         }
 588
 589         return True;
 590 }
 591
 592 /****************************************************************************
 593  Use in-memory credentials cache
 594 ****************************************************************************/
 595
 596 static void use_in_memory_ccache(void) {
 597         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 598 }
 599
 600 /****************************************************************************
 601  Do a spnego/kerberos encrypted session setup.
 602 ****************************************************************************/
 603
 604 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 605 {
 606         DATA_BLOB negTokenTarg;
 607         DATA_BLOB session_key_krb5;
 608         int rc;
 609
 610         DEBUG(2,("Doing kerberos session setup\n"));
 611
 612         /* generate the encapsulated kerberos5 ticket */
 613         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0, NULL);
 614
 615         if (rc) {
 616                 DEBUG(1, ("cli_session_setup_kerberos: spnego_gen_negTokenTarg failed: %s\n",
 617                         error_message(rc)));
 618                 return ADS_ERROR_KRB5(rc);
 619         }
 620
 621 #if 0
 622         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 623 #endif
 624
 625         if (!cli_session_setup_blob(cli, negTokenTarg, session_key_krb5)) {
 626                 data_blob_free(&negTokenTarg);
 627                 data_blob_free(&session_key_krb5);
 628                 ADS_ERROR_NT(cli_nt_error(cli));
 629         }
 630
 631         cli_set_session_key(cli, session_key_krb5);
 632
 633         data_blob_free(&negTokenTarg);
 634         data_blob_free(&session_key_krb5);
 635
 636         if (cli_is_error(cli)) {
 637                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 638                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 639                 }
 640         }
 641         return ADS_ERROR_NT(cli_nt_error(cli));
 642 }
 643 #endif  /* HAVE_KRB5 */
 644
 645
 646 /****************************************************************************
 647  Do a spnego/NTLMSSP encrypted session setup.
 648 ****************************************************************************/
 649
 650 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 651                                           const char *pass, const char *domain)
 652 {
 653         struct ntlmssp_state *ntlmssp_state;
 654         NTSTATUS nt_status;
 655         int turn = 1;
 656         DATA_BLOB msg1;
 657         DATA_BLOB blob = data_blob(NULL, 0);
 658         DATA_BLOB blob_in = data_blob(NULL, 0);
 659         DATA_BLOB blob_out = data_blob(NULL, 0);
 660
 661         cli_temp_set_signing(cli);
 662
 663         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 664                 return nt_status;
 665         }
 666         ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 667
 668         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 669                 return nt_status;
 670         }
 671         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 672                 return nt_status;
 673         }
 674         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 675                 return nt_status;
 676         }
 677
 678         do {
 679                 nt_status = ntlmssp_update(ntlmssp_state,
 680                                                   blob_in, &blob_out);
 681                 data_blob_free(&blob_in);
 682                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 683                         if (turn == 1) {
 684                                 /* and wrap it in a SPNEGO wrapper */
 685                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 686                         } else {
 687                                 /* wrap it in SPNEGO */
 688                                 msg1 = spnego_gen_auth(blob_out);
 689                         }
 690
 691                         /* now send that blob on its way */
 692                         if (!cli_session_setup_blob_send(cli, msg1)) {
 693                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 694                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 695                         } else {
 696                                 blob = cli_session_setup_blob_receive(cli);
 697
 698                                 nt_status = cli_nt_error(cli);
 699                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 700                                         if (cli->smb_rw_error == READ_BAD_SIG) {
 701                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 702                                         } else {
 703                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 704                                         }
 705                                 }
 706                         }
 707                         data_blob_free(&msg1);
 708                 }
 709
 710                 if (!blob.length) {
 711                         if (NT_STATUS_IS_OK(nt_status)) {
 712                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 713                         }
 714                 } else if ((turn == 1) &&
 715                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 716                         DATA_BLOB tmp_blob = data_blob(NULL, 0);
 717                         /* the server might give us back two challenges */
 718                         if (!spnego_parse_challenge(blob, &blob_in,
 719                                                     &tmp_blob)) {
 720                                 DEBUG(3,("Failed to parse challenges\n"));
 721                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 722                         }
 723                         data_blob_free(&tmp_blob);
 724                 } else {
 725                         if (!spnego_parse_auth_response(blob, nt_status, OID_NTLMSSP,
 726                                                         &blob_in)) {
 727                                 DEBUG(3,("Failed to parse auth response\n"));
 728                                 if (NT_STATUS_IS_OK(nt_status)
 729                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 730                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 731                         }
 732                 }
 733                 data_blob_free(&blob);
 734                 data_blob_free(&blob_out);
 735                 turn++;
 736         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 737
 738         data_blob_free(&blob_in);
 739
 740         if (NT_STATUS_IS_OK(nt_status)) {
 741
 742                 DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
 743                                           ntlmssp_state->session_key.length);
 744                 DATA_BLOB null_blob = data_blob(NULL, 0);
 745                 BOOL res;
 746
 747                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 748                 cli_set_session_key(cli, ntlmssp_state->session_key);
 749
 750                 res = cli_simple_set_signing(cli, key, null_blob);
 751
 752                 data_blob_free(&key);
 753
 754                 if (res) {
 755
 756                         /* 'resign' the last message, so we get the right sequence numbers
 757                            for checking the first reply from the server */
 758                         cli_calculate_sign_mac(cli);
 759
 760                         if (!cli_check_sign_mac(cli)) {
 761                                 nt_status = NT_STATUS_ACCESS_DENIED;
 762                         }
 763                 }
 764         }
 765
 766         /* we have a reference counter on ntlmssp_state, if we are signing
 767            then the state will be kept by the signing engine */
 768
 769         ntlmssp_end(&ntlmssp_state);
 770
 771         return nt_status;
 772 }
 773
 774 /****************************************************************************
 775  Do a spnego encrypted session setup.
 776 ****************************************************************************/
 777
 778 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 779                               const char *pass, const char *domain)
 780 {
 781         char *principal;
 782         char *OIDs[ASN1_MAX_OIDS];
 783         int i;
 784         BOOL got_kerberos_mechanism = False;
 785         DATA_BLOB blob;
 786
 787         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 788
 789         /* the server might not even do spnego */
 790         if (cli->secblob.length <= 16) {
 791                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 792                 goto ntlmssp;
 793         }
 794
 795 #if 0
 796         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 797 #endif
 798
 799         /* there is 16 bytes of GUID before the real spnego packet starts */
 800         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 801
 802         /* the server sent us the first part of the SPNEGO exchange in the negprot
 803            reply */
 804         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 805                 data_blob_free(&blob);
 806                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 807         }
 808         data_blob_free(&blob);
 809
 810         /* make sure the server understands kerberos */
 811         for (i=0;OIDs[i];i++) {
 812                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 813                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 814                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 815                         got_kerberos_mechanism = True;
 816                 }
 817                 free(OIDs[i]);
 818         }
 819
 820         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 821
 822         if (got_kerberos_mechanism && (principal == NULL)) {
 823                 /*
 824                  * It is WRONG to depend on the principal sent in the negprot
 825                  * reply, but right now we do it. So for safety (don't
 826                  * segfault later) disable Kerberos when no principal was
 827                  * sent. -- VL
 828                  */
 829                 DEBUG(1, ("Kerberos mech was offered, but no principal was "
 830                           "sent, disabling Kerberos\n"));
 831                 cli->use_kerberos = False;
 832         }
 833
 834         fstrcpy(cli->user_name, user);
 835
 836 #ifdef HAVE_KRB5
 837         /* If password is set we reauthenticate to kerberos server
 838          * and do not store results */
 839
 840         if (got_kerberos_mechanism && cli->use_kerberos) {
 841                 ADS_STATUS rc;
 842
 843                 if (pass && *pass) {
 844                         int ret;
 845
 846                         use_in_memory_ccache();
 847                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 848
 849                         if (ret){
 850                                 SAFE_FREE(principal);
 851                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 852                                 if (cli->fallback_after_kerberos)
 853                                         goto ntlmssp;
 854                                 return ADS_ERROR_KRB5(ret);
 855                         }
 856                 }
 857
 858                 rc = cli_session_setup_kerberos(cli, principal, domain);
 859                 if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 860                         SAFE_FREE(principal);
 861                         return rc;
 862                 }
 863         }
 864 #endif
 865
 866         SAFE_FREE(principal);
 867
 868 ntlmssp:
 869
 870         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, user, pass, domain));
 871 }
 872
 873 /****************************************************************************
 874  Send a session setup. The username and workgroup is in UNIX character
 875  format and must be converted to DOS codepage format before sending. If the
 876  password is in plaintext, the same should be done.
 877 ****************************************************************************/
 878
 879 NTSTATUS cli_session_setup(struct cli_state *cli,
 880                            const char *user,
 881                            const char *pass, int passlen,
 882                            const char *ntpass, int ntpasslen,
 883                            const char *workgroup)
 884 {
 885         char *p;
 886         fstring user2;
 887
 888         /* allow for workgroups as part of the username */
 889         fstrcpy(user2, user);
 890         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 891             (p=strchr_m(user2,*lp_winbind_separator()))) {
 892                 *p = 0;
 893                 user = p+1;
 894                 workgroup = user2;
 895         }
 896
 897         if (cli->protocol < PROTOCOL_LANMAN1) {
 898                 return NT_STATUS_OK;
 899         }
 900
 901         /* now work out what sort of session setup we are going to
 902            do. I have split this into separate functions to make the
 903            flow a bit easier to understand (tridge) */
 904
 905         /* if its an older server then we have to use the older request format */
 906
 907         if (cli->protocol < PROTOCOL_NT1) {
 908                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 909                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 910                                   " is disabled\n"));
 911                         return NT_STATUS_ACCESS_DENIED;
 912                 }
 913
 914                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 915                     !lp_client_plaintext_auth() && (*pass)) {
 916                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 917                                   " is disabled\n"));
 918                         return NT_STATUS_ACCESS_DENIED;
 919                 }
 920
 921                 return cli_session_setup_lanman2(cli, user, pass, passlen,
 922                                                  workgroup);
 923         }
 924
 925         /* if no user is supplied then we have to do an anonymous connection.
 926            passwords are ignored */
 927
 928         if (!user || !*user)
 929                 return cli_session_setup_guest(cli);
 930
 931         /* if the server is share level then send a plaintext null
 932            password at this point. The password is sent in the tree
 933            connect */
 934
 935         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
 936                 return cli_session_setup_plaintext(cli, user, "", workgroup);
 937
 938         /* if the server doesn't support encryption then we have to use
 939            plaintext. The second password is ignored */
 940
 941         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
 942                 if (!lp_client_plaintext_auth() && (*pass)) {
 943                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 944                                   " is disabled\n"));
 945                         return NT_STATUS_ACCESS_DENIED;
 946                 }
 947                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
 948         }
 949
 950         /* if the server supports extended security then use SPNEGO */
 951
 952         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
 953                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass, workgroup);
 954                 if (!ADS_ERR_OK(status)) {
 955                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
 956                         return ads_ntstatus(status);
 957                 }
 958         } else {
 959                 NTSTATUS status;
 960
 961                 /* otherwise do a NT1 style session setup */
 962                 status = cli_session_setup_nt1(cli, user, pass, passlen,
 963                                                ntpass, ntpasslen, workgroup);
 964                 if (!NT_STATUS_IS_OK(status)) {
 965                         DEBUG(3,("cli_session_setup: NT1 session setup "
 966                                  "failed: %s\n", nt_errstr(status)));
 967                         return status;
 968                 }
 969         }
 970
 971         if (strstr(cli->server_type, "Samba")) {
 972                 cli->is_samba = True;
 973         }
 974
 975         return NT_STATUS_OK;
 976 }
 977
 978 /****************************************************************************
 979  Send a uloggoff.
 980 *****************************************************************************/
 981
 982 BOOL cli_ulogoff(struct cli_state *cli)
 983 {
 984         memset(cli->outbuf,'\0',smb_size);
 985         set_message(NULL,cli->outbuf,2,0,True);
 986         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
 987         cli_setup_packet(cli);
 988         SSVAL(cli->outbuf,smb_vwv0,0xFF);
 989         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
 990
 991         cli_send_smb(cli);
 992         if (!cli_receive_smb(cli))
 993                 return False;
 994
 995         if (cli_is_error(cli)) {
 996                 return False;
 997         }
 998
 999         cli->cnum = -1;
1000         return True;
1001 }
1002
1003 /****************************************************************************
1004  Send a tconX.
1005 ****************************************************************************/
1006
1007 BOOL cli_send_tconX(struct cli_state *cli,
1008                     const char *share, const char *dev, const char *pass, int passlen)
1009 {
1010         fstring fullshare, pword;
1011         char *p;
1012         memset(cli->outbuf,'\0',smb_size);
1013         memset(cli->inbuf,'\0',smb_size);
1014
1015         fstrcpy(cli->share, share);
1016
1017         /* in user level security don't send a password now */
1018         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1019                 passlen = 1;
1020                 pass = "";
1021         } else if (!pass) {
1022                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1023                 return False;
1024         }
1025
1026         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1027             *pass && passlen != 24) {
1028                 if (!lp_client_lanman_auth()) {
1029                         DEBUG(1, ("Server requested LANMAN password (share-level security) but 'client use lanman auth'"
1030                                   " is disabled\n"));
1031                         return False;
1032                 }
1033
1034                 /*
1035                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1036                  */
1037                 passlen = 24;
1038                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1039         } else {
1040                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1041                         if (!lp_client_plaintext_auth() && (*pass)) {
1042                                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1043                                           " is disabled\n"));
1044                                 return False;
1045                         }
1046
1047                         /*
1048                          * Non-encrypted passwords - convert to DOS codepage before using.
1049                          */
1050                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1051
1052                 } else {
1053                         if (passlen) {
1054                                 memcpy(pword, pass, passlen);
1055                         }
1056                 }
1057         }
1058
1059         slprintf(fullshare, sizeof(fullshare)-1,
1060                  "\\\\%s\\%s", cli->desthost, share);
1061
1062         set_message(NULL,cli->outbuf,4, 0, True);
1063         SCVAL(cli->outbuf,smb_com,SMBtconX);
1064         cli_setup_packet(cli);
1065
1066         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1067         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1068         SSVAL(cli->outbuf,smb_vwv3,passlen);
1069
1070         p = smb_buf(cli->outbuf);
1071         if (passlen) {
1072                 memcpy(p,pword,passlen);
1073         }
1074         p += passlen;
1075         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1076         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1077
1078         cli_setup_bcc(cli, p);
1079
1080         cli_send_smb(cli);
1081         if (!cli_receive_smb(cli))
1082                 return False;
1083
1084         if (cli_is_error(cli))
1085                 return False;
1086
1087         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1088
1089         if (cli->protocol >= PROTOCOL_NT1 &&
1090             smb_buflen(cli->inbuf) == 3) {
1091                 /* almost certainly win95 - enable bug fixes */
1092                 cli->win95 = True;
1093         }
1094
1095         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1096         /* Avoids issues when connecting to Win9x boxes sharing files */
1097
1098         cli->dfsroot = False;
1099         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1100                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1101
1102         cli->cnum = SVAL(cli->inbuf,smb_tid);
1103         return True;
1104 }
1105
1106 /****************************************************************************
1107  Send a tree disconnect.
1108 ****************************************************************************/
1109
1110 BOOL cli_tdis(struct cli_state *cli)
1111 {
1112         memset(cli->outbuf,'\0',smb_size);
1113         set_message(NULL,cli->outbuf,0,0,True);
1114         SCVAL(cli->outbuf,smb_com,SMBtdis);
1115         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1116         cli_setup_packet(cli);
1117
1118         cli_send_smb(cli);
1119         if (!cli_receive_smb(cli))
1120                 return False;
1121
1122         if (cli_is_error(cli)) {
1123                 return False;
1124         }
1125
1126         cli->cnum = -1;
1127         return True;
1128 }
1129
1130 /****************************************************************************
1131  Send a negprot command.
1132 ****************************************************************************/
1133
1134 void cli_negprot_send(struct cli_state *cli)
1135 {
1136         char *p;
1137         int numprots;
1138
1139         if (cli->protocol < PROTOCOL_NT1)
1140                 cli->use_spnego = False;
1141
1142         memset(cli->outbuf,'\0',smb_size);
1143
1144         /* setup the protocol strings */
1145         set_message(NULL,cli->outbuf,0,0,True);
1146
1147         p = smb_buf(cli->outbuf);
1148         for (numprots=0;
1149              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1150              numprots++) {
1151                 *p++ = 2;
1152                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1153         }
1154
1155         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1156         cli_setup_bcc(cli, p);
1157         cli_setup_packet(cli);
1158
1159         SCVAL(smb_buf(cli->outbuf),0,2);
1160
1161         cli_send_smb(cli);
1162 }
1163
1164 /****************************************************************************
1165  Send a negprot command.
1166 ****************************************************************************/
1167
1168 BOOL cli_negprot(struct cli_state *cli)
1169 {
1170         char *p;
1171         int numprots;
1172         int plength;
1173
1174         if (cli->protocol < PROTOCOL_NT1)
1175                 cli->use_spnego = False;
1176
1177         memset(cli->outbuf,'\0',smb_size);
1178
1179         /* setup the protocol strings */
1180         for (plength=0,numprots=0;
1181              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1182              numprots++)
1183                 plength += strlen(prots[numprots].name)+2;
1184
1185         set_message(NULL,cli->outbuf,0,plength,True);
1186
1187         p = smb_buf(cli->outbuf);
1188         for (numprots=0;
1189              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1190              numprots++) {
1191                 *p++ = 2;
1192                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1193         }
1194
1195         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1196         cli_setup_packet(cli);
1197
1198         SCVAL(smb_buf(cli->outbuf),0,2);
1199
1200         cli_send_smb(cli);
1201         if (!cli_receive_smb(cli))
1202                 return False;
1203
1204         show_msg(cli->inbuf);
1205
1206         if (cli_is_error(cli) ||
1207             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1208                 return(False);
1209         }
1210
1211         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1212
1213         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1214                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1215                 return False;
1216         }
1217
1218         if (cli->protocol >= PROTOCOL_NT1) {
1219                 struct timespec ts;
1220                 /* NT protocol */
1221                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1222                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1223                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1224                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1225                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1226                 cli->serverzone *= 60;
1227                 /* this time arrives in real GMT */
1228                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1229                 cli->servertime = ts.tv_sec;
1230                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1231                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1232                 if (cli->capabilities & CAP_RAW_MODE) {
1233                         cli->readbraw_supported = True;
1234                         cli->writebraw_supported = True;
1235                 }
1236                 /* work out if they sent us a workgroup */
1237                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1238                     smb_buflen(cli->inbuf) > 8) {
1239                         clistr_pull(cli, cli->server_domain,
1240                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1241                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1242                 }
1243
1244                 /*
1245                  * As signing is slow we only turn it on if either the client or
1246                  * the server require it. JRA.
1247                  */
1248
1249                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1250                         /* Fail if server says signing is mandatory and we don't want to support it. */
1251                         if (!cli->sign_info.allow_smb_signing) {
1252                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1253                                 return False;
1254                         }
1255                         cli->sign_info.negotiated_smb_signing = True;
1256                         cli->sign_info.mandatory_signing = True;
1257                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1258                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1259                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1260                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1261                                 return False;
1262                         }
1263                         cli->sign_info.negotiated_smb_signing = True;
1264                         cli->sign_info.mandatory_signing = True;
1265                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1266                         cli->sign_info.negotiated_smb_signing = True;
1267                 }
1268
1269                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1270                         SAFE_FREE(cli->outbuf);
1271                         SAFE_FREE(cli->inbuf);
1272                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1273                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1274                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
1275                 }
1276
1277         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1278                 cli->use_spnego = False;
1279                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1280                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1281                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1282                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1283                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1284                 cli->serverzone *= 60;
1285                 /* this time is converted to GMT by make_unix_date */
1286                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1287                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1288                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1289                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1290         } else {
1291                 /* the old core protocol */
1292                 cli->use_spnego = False;
1293                 cli->sec_mode = 0;
1294                 cli->serverzone = get_time_zone(time(NULL));
1295         }
1296
1297         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1298
1299         /* a way to force ascii SMB */
1300         if (getenv("CLI_FORCE_ASCII"))
1301                 cli->capabilities &= ~CAP_UNICODE;
1302
1303         return True;
1304 }
1305
1306 /****************************************************************************
1307  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1308 ****************************************************************************/
1309
1310 BOOL cli_session_request(struct cli_state *cli,
1311                          struct nmb_name *calling, struct nmb_name *called)
1312 {
1313         char *p;
1314         int len = 4;
1315
1316         memcpy(&(cli->calling), calling, sizeof(*calling));
1317         memcpy(&(cli->called ), called , sizeof(*called ));
1318
1319         /* put in the destination name */
1320         p = cli->outbuf+len;
1321         name_mangle(cli->called .name, p, cli->called .name_type);
1322         len += name_len(p);
1323
1324         /* and my name */
1325         p = cli->outbuf+len;
1326         name_mangle(cli->calling.name, p, cli->calling.name_type);
1327         len += name_len(p);
1328
1329         /* 445 doesn't have session request */
1330         if (cli->port == 445)
1331                 return True;
1332
1333         /* send a session request (RFC 1002) */
1334         /* setup the packet length
1335          * Remove four bytes from the length count, since the length
1336          * field in the NBT Session Service header counts the number
1337          * of bytes which follow.  The cli_send_smb() function knows
1338          * about this and accounts for those four bytes.
1339          * CRH.
1340          */
1341         len -= 4;
1342         _smb_setlen(cli->outbuf,len);
1343         SCVAL(cli->outbuf,0,0x81);
1344
1345         cli_send_smb(cli);
1346         DEBUG(5,("Sent session request\n"));
1347
1348         if (!cli_receive_smb(cli))
1349                 return False;
1350
1351         if (CVAL(cli->inbuf,0) == 0x84) {
1352                 /* C. Hoch  9/14/95 Start */
1353                 /* For information, here is the response structure.
1354                  * We do the byte-twiddling to for portability.
1355                 struct RetargetResponse{
1356                 unsigned char type;
1357                 unsigned char flags;
1358                 int16 length;
1359                 int32 ip_addr;
1360                 int16 port;
1361                 };
1362                 */
1363                 int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1364                 /* SESSION RETARGET */
1365                 putip((char *)&cli->dest_ip,cli->inbuf+4);
1366
1367                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
1368                 if (cli->fd == -1)
1369                         return False;
1370
1371                 DEBUG(3,("Retargeted\n"));
1372
1373                 set_socket_options(cli->fd,user_socket_options);
1374
1375                 /* Try again */
1376                 {
1377                         static int depth;
1378                         BOOL ret;
1379                         if (depth > 4) {
1380                                 DEBUG(0,("Retarget recursion - failing\n"));
1381                                 return False;
1382                         }
1383                         depth++;
1384                         ret = cli_session_request(cli, calling, called);
1385                         depth--;
1386                         return ret;
1387                 }
1388         } /* C. Hoch 9/14/95 End */
1389
1390         if (CVAL(cli->inbuf,0) != 0x82) {
1391                 /* This is the wrong place to put the error... JRA. */
1392                 cli->rap_error = CVAL(cli->inbuf,4);
1393                 return False;
1394         }
1395         return(True);
1396 }
1397
1398 /****************************************************************************
1399  Open the client sockets.
1400 ****************************************************************************/
1401
1402 BOOL cli_connect(struct cli_state *cli, const char *host, struct in_addr *ip)
1403 {
1404         int name_type = 0x20;
1405         char *p;
1406
1407         /* reasonable default hostname */
1408         if (!host) host = "*SMBSERVER";
1409
1410         fstrcpy(cli->desthost, host);
1411
1412         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1413         if ((p = strchr(cli->desthost, '#'))) {
1414                 name_type = strtol(p+1, NULL, 16);
1415                 *p = 0;
1416         }
1417
1418         if (!ip || is_zero_ip(*ip)) {
1419                 if (!resolve_name(cli->desthost, &cli->dest_ip, name_type)) {
1420                         return False;
1421                 }
1422                 if (ip) *ip = cli->dest_ip;
1423         } else {
1424                 cli->dest_ip = *ip;
1425         }
1426
1427         if (getenv("LIBSMB_PROG")) {
1428                 cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1429         } else {
1430                 /* try 445 first, then 139 */
1431                 int port = cli->port?cli->port:445;
1432                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1433                                           port, cli->timeout);
1434                 if (cli->fd == -1 && cli->port == 0) {
1435                         port = 139;
1436                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1437                                                   port, cli->timeout);
1438                 }
1439                 if (cli->fd != -1)
1440                         cli->port = port;
1441         }
1442         if (cli->fd == -1) {
1443                 DEBUG(1,("Error connecting to %s (%s)\n",
1444                          ip?inet_ntoa(*ip):host,strerror(errno)));
1445                 return False;
1446         }
1447
1448         set_socket_options(cli->fd,user_socket_options);
1449
1450         return True;
1451 }
1452
1453 /**
1454    establishes a connection to after the negprot.
1455    @param output_cli A fully initialised cli structure, non-null only on success
1456    @param dest_host The netbios name of the remote host
1457    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1458    @param port (optional) The destination port (0 for default)
1459    @param retry BOOL. Did this connection fail with a retryable error ?
1460
1461 */
1462 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1463                               const char *my_name,
1464                               const char *dest_host,
1465                               struct in_addr *dest_ip, int port,
1466                               int signing_state, int flags,
1467                               BOOL *retry)
1468 {
1469         NTSTATUS nt_status;
1470         struct nmb_name calling;
1471         struct nmb_name called;
1472         struct cli_state *cli;
1473         struct in_addr ip;
1474
1475         if (retry)
1476                 *retry = False;
1477
1478         if (!my_name)
1479                 my_name = global_myname();
1480
1481         if (!(cli = cli_initialise())) {
1482                 return NT_STATUS_NO_MEMORY;
1483         }
1484
1485         make_nmb_name(&calling, my_name, 0x0);
1486         make_nmb_name(&called , dest_host, 0x20);
1487
1488         if (cli_set_port(cli, port) != port) {
1489                 cli_shutdown(cli);
1490                 return NT_STATUS_UNSUCCESSFUL;
1491         }
1492
1493         cli_set_timeout(cli, 10000); /* 10 seconds. */
1494
1495         if (dest_ip)
1496                 ip = *dest_ip;
1497         else
1498                 ZERO_STRUCT(ip);
1499
1500 again:
1501
1502         DEBUG(3,("Connecting to host=%s\n", dest_host));
1503
1504         if (!cli_connect(cli, dest_host, &ip)) {
1505                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s)\n",
1506                          nmb_namestr(&called), inet_ntoa(ip)));
1507                 cli_shutdown(cli);
1508                 if (is_zero_ip(ip)) {
1509                         return NT_STATUS_BAD_NETWORK_NAME;
1510                 } else {
1511                         return NT_STATUS_CONNECTION_REFUSED;
1512                 }
1513         }
1514
1515         if (retry)
1516                 *retry = True;
1517
1518         if (!cli_session_request(cli, &calling, &called)) {
1519                 char *p;
1520                 DEBUG(1,("session request to %s failed (%s)\n",
1521                          called.name, cli_errstr(cli)));
1522                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1523                         *p = 0;
1524                         goto again;
1525                 }
1526                 if (strcmp(called.name, "*SMBSERVER")) {
1527                         make_nmb_name(&called , "*SMBSERVER", 0x20);
1528                         goto again;
1529                 }
1530                 return NT_STATUS_BAD_NETWORK_NAME;
1531         }
1532
1533         cli_setup_signing_state(cli, signing_state);
1534
1535         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1536                 cli->use_spnego = False;
1537         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1538                 cli->use_kerberos = True;
1539
1540         if (!cli_negprot(cli)) {
1541                 DEBUG(1,("failed negprot\n"));
1542                 nt_status = cli_nt_error(cli);
1543                 if (NT_STATUS_IS_OK(nt_status)) {
1544                         nt_status = NT_STATUS_UNSUCCESSFUL;
1545                 }
1546                 cli_shutdown(cli);
1547                 return nt_status;
1548         }
1549
1550         *output_cli = cli;
1551         return NT_STATUS_OK;
1552 }
1553
1554
1555 /**
1556    establishes a connection right up to doing tconX, password specified.
1557    @param output_cli A fully initialised cli structure, non-null only on success
1558    @param dest_host The netbios name of the remote host
1559    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1560    @param port (optional) The destination port (0 for default)
1561    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1562    @param service_type The 'type' of serivice.
1563    @param user Username, unix string
1564    @param domain User's domain
1565    @param password User's password, unencrypted unix string.
1566    @param retry BOOL. Did this connection fail with a retryable error ?
1567 */
1568
1569 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1570                              const char *my_name,
1571                              const char *dest_host,
1572                              struct in_addr *dest_ip, int port,
1573                              const char *service, const char *service_type,
1574                              const char *user, const char *domain,
1575                              const char *password, int flags,
1576                              int signing_state,
1577                              BOOL *retry)
1578 {
1579         NTSTATUS nt_status;
1580         struct cli_state *cli = NULL;
1581         int pw_len = password ? strlen(password)+1 : 0;
1582
1583         *output_cli = NULL;
1584
1585         if (password == NULL) {
1586                 password = "";
1587         }
1588
1589         nt_status = cli_start_connection(&cli, my_name, dest_host,
1590                                          dest_ip, port, signing_state, flags, retry);
1591
1592         if (!NT_STATUS_IS_OK(nt_status)) {
1593                 return nt_status;
1594         }
1595
1596         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1597                                       pw_len, domain);
1598         if (!NT_STATUS_IS_OK(nt_status)) {
1599
1600                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1601                         DEBUG(1,("failed session setup with %s\n",
1602                                  nt_errstr(nt_status)));
1603                         cli_shutdown(cli);
1604                         return nt_status;
1605                 }
1606
1607                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1608                 if (!NT_STATUS_IS_OK(nt_status)) {
1609                         DEBUG(1,("anonymous failed session setup with %s\n",
1610                                  nt_errstr(nt_status)));
1611                         cli_shutdown(cli);
1612                         return nt_status;
1613                 }
1614         }
1615
1616         if (service) {
1617                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1618                         nt_status = cli_nt_error(cli);
1619                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1620                         cli_shutdown(cli);
1621                         if (NT_STATUS_IS_OK(nt_status)) {
1622                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1623                         }
1624                         return nt_status;
1625                 }
1626         }
1627
1628         cli_init_creds(cli, user, domain, password);
1629
1630         *output_cli = cli;
1631         return NT_STATUS_OK;
1632 }
1633
1634 /****************************************************************************
1635  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1636 ****************************************************************************/
1637
1638 BOOL attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1639                                      struct in_addr *pdest_ip)
1640 {
1641         struct nmb_name calling, called;
1642
1643         make_nmb_name(&calling, srchost, 0x0);
1644
1645         /*
1646          * If the called name is an IP address
1647          * then use *SMBSERVER immediately.
1648          */
1649
1650         if(is_ipaddress(desthost)) {
1651                 make_nmb_name(&called, "*SMBSERVER", 0x20);
1652         } else {
1653                 make_nmb_name(&called, desthost, 0x20);
1654         }
1655
1656         if (!cli_session_request(*ppcli, &calling, &called)) {
1657                 struct nmb_name smbservername;
1658
1659                 make_nmb_name(&smbservername , "*SMBSERVER", 0x20);
1660
1661                 /*
1662                  * If the name wasn't *SMBSERVER then
1663                  * try with *SMBSERVER if the first name fails.
1664                  */
1665
1666                 if (nmb_name_equal(&called, &smbservername)) {
1667
1668                         /*
1669                          * The name used was *SMBSERVER, don't bother with another name.
1670                          */
1671
1672                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1673 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1674                         return False;
1675                 }
1676
1677                 /* Try again... */
1678                 cli_shutdown(*ppcli);
1679
1680                 *ppcli = cli_initialise();
1681                 if (!*ppcli) {
1682                         /* Out of memory... */
1683                         return False;
1684                 }
1685
1686                 if (!cli_connect(*ppcli, desthost, pdest_ip) ||
1687                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1688                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1689 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1690                         return False;
1691                 }
1692         }
1693
1694         return True;
1695 }
1696
1697
1698
1699
1700
1701 /****************************************************************************
1702  Send an old style tcon.
1703 ****************************************************************************/
1704 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1705                       const char *service, const char *pass, const char *dev,
1706                       uint16 *max_xmit, uint16 *tid)
1707 {
1708         char *p;
1709
1710         if (!lp_client_plaintext_auth() && (*pass)) {
1711                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1712                           " is disabled\n"));
1713                 return NT_STATUS_ACCESS_DENIED;
1714         }
1715
1716         memset(cli->outbuf,'\0',smb_size);
1717         memset(cli->inbuf,'\0',smb_size);
1718
1719         set_message(NULL,cli->outbuf, 0, 0, True);
1720         SCVAL(cli->outbuf,smb_com,SMBtcon);
1721         cli_setup_packet(cli);
1722
1723         p = smb_buf(cli->outbuf);
1724         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1725         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1726         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1727
1728         cli_setup_bcc(cli, p);
1729
1730         cli_send_smb(cli);
1731         if (!cli_receive_smb(cli)) {
1732                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1733         }
1734
1735         if (cli_is_error(cli)) {
1736                 return cli_nt_error(cli);
1737         }
1738
1739         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1740         *tid = SVAL(cli->inbuf, smb_vwv1);
1741
1742         return NT_STATUS_OK;
1743 }
1744
1745 /* Return a cli_state pointing at the IPC$ share for the given server */
1746
1747 struct cli_state *get_ipc_connect(char *server, struct in_addr *server_ip,
1748                                          struct user_auth_info *user_info)
1749 {
1750         struct cli_state *cli;
1751         pstring myname;
1752         NTSTATUS nt_status;
1753
1754         get_myname(myname);
1755
1756         nt_status = cli_full_connection(&cli, myname, server, server_ip, 0, "IPC$", "IPC",
1757                                         user_info->username, lp_workgroup(), user_info->password,
1758                                         CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK, Undefined, NULL);
1759
1760         if (NT_STATUS_IS_OK(nt_status)) {
1761                 return cli;
1762         } else if (is_ipaddress(server)) {
1763             /* windows 9* needs a correct NMB name for connections */
1764             fstring remote_name;
1765
1766             if (name_status_find("*", 0, 0, *server_ip, remote_name)) {
1767                 cli = get_ipc_connect(remote_name, server_ip, user_info);
1768                 if (cli)
1769                     return cli;
1770             }
1771         }
1772         return NULL;
1773 }
1774
1775 /*
1776  * Given the IP address of a master browser on the network, return its
1777  * workgroup and connect to it.
1778  *
1779  * This function is provided to allow additional processing beyond what
1780  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1781  * browsers and obtain each master browsers' list of domains (in case the
1782  * first master browser is recently on the network and has not yet
1783  * synchronized with other master browsers and therefore does not yet have the
1784  * entire network browse list)
1785  */
1786
1787 struct cli_state *get_ipc_connect_master_ip(struct ip_service * mb_ip, pstring workgroup, struct user_auth_info *user_info)
1788 {
1789         static fstring name;
1790         struct cli_state *cli;
1791         struct in_addr server_ip;
1792
1793         DEBUG(99, ("Looking up name of master browser %s\n",
1794                    inet_ntoa(mb_ip->ip)));
1795
1796         /*
1797          * Do a name status query to find out the name of the master browser.
1798          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1799          * master browser will not respond to a wildcard query (or, at least,
1800          * an NT4 server acting as the domain master browser will not).
1801          *
1802          * We might be able to use ONLY the query on MSBROWSE, but that's not
1803          * yet been tested with all Windows versions, so until it is, leave
1804          * the original wildcard query as the first choice and fall back to
1805          * MSBROWSE if the wildcard query fails.
1806          */
1807         if (!name_status_find("*", 0, 0x1d, mb_ip->ip, name) &&
1808             !name_status_find(MSBROWSE, 1, 0x1d, mb_ip->ip, name)) {
1809
1810                 DEBUG(99, ("Could not retrieve name status for %s\n",
1811                            inet_ntoa(mb_ip->ip)));
1812                 return NULL;
1813         }
1814
1815         if (!find_master_ip(name, &server_ip)) {
1816                 DEBUG(99, ("Could not find master ip for %s\n", name));
1817                 return NULL;
1818         }
1819
1820                 pstrcpy(workgroup, name);
1821
1822                 DEBUG(4, ("found master browser %s, %s\n",
1823                   name, inet_ntoa(mb_ip->ip)));
1824
1825                 cli = get_ipc_connect(inet_ntoa(server_ip), &server_ip, user_info);
1826
1827                 return cli;
1828
1829 }
1830
1831 /*
1832  * Return the IP address and workgroup of a master browser on the network, and
1833  * connect to it.
1834  */
1835
1836 struct cli_state *get_ipc_connect_master_ip_bcast(pstring workgroup, struct user_auth_info *user_info)
1837 {
1838         struct ip_service *ip_list;
1839         struct cli_state *cli;
1840         int i, count;
1841
1842         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1843
1844         /* Go looking for workgroups by broadcasting on the local network */
1845
1846         if (!name_resolve_bcast(MSBROWSE, 1, &ip_list, &count)) {
1847                 DEBUG(99, ("No master browsers responded\n"));
1848                 return False;
1849         }
1850
1851         for (i = 0; i < count; i++) {
1852             DEBUG(99, ("Found master browser %s\n", inet_ntoa(ip_list[i].ip)));
1853
1854             cli = get_ipc_connect_master_ip(&ip_list[i], workgroup, user_info);
1855             if (cli)
1856                     return(cli);
1857         }
1858
1859         return NULL;
1860 }