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