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,"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, 0);
  64         DATA_BLOB lm_response = data_blob(NULL, 0);
  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, 0);
 302         DATA_BLOB nt_response = data_blob(NULL, 0);
 303         DATA_BLOB session_key = data_blob(NULL, 0);
 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, 0);
 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, 0);
 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 /****************************************************************************
 521  Send a extended security session setup blob, returning a reply blob.
 522 ****************************************************************************/
 523
 524 static DATA_BLOB cli_session_setup_blob(struct cli_state *cli, DATA_BLOB blob)
 525 {
 526         DATA_BLOB blob2 = data_blob(NULL, 0);
 527         if (!cli_session_setup_blob_send(cli, blob)) {
 528                 return blob2;
 529         }
 530
 531         return cli_session_setup_blob_receive(cli);
 532 }
 533
 534 /****************************************************************************
 535  Use in-memory credentials cache
 536 ****************************************************************************/
 537
 538 static void use_in_memory_ccache(void) {
 539         setenv(KRB5_ENV_CCNAME, "MEMORY:cliconnect", 1);
 540 }
 541
 542 /****************************************************************************
 543  Do a spnego/kerberos encrypted session setup.
 544 ****************************************************************************/
 545
 546 static ADS_STATUS cli_session_setup_kerberos(struct cli_state *cli, const char *principal, const char *workgroup)
 547 {
 548         DATA_BLOB blob2, negTokenTarg;
 549         DATA_BLOB session_key_krb5;
 550         DATA_BLOB null_blob = data_blob(NULL, 0);
 551         int rc;
 552
 553         DEBUG(2,("Doing kerberos session setup\n"));
 554
 555         /* generate the encapsulated kerberos5 ticket */
 556         rc = spnego_gen_negTokenTarg(principal, 0, &negTokenTarg, &session_key_krb5, 0);
 557
 558         if (rc) {
 559                 DEBUG(1, ("spnego_gen_negTokenTarg failed: %s\n", error_message(rc)));
 560                 return ADS_ERROR_KRB5(rc);
 561         }
 562
 563 #if 0
 564         file_save("negTokenTarg.dat", negTokenTarg.data, negTokenTarg.length);
 565 #endif
 566
 567         cli_simple_set_signing(cli, session_key_krb5, null_blob);
 568
 569         blob2 = cli_session_setup_blob(cli, negTokenTarg);
 570
 571         /* we don't need this blob for kerberos */
 572         data_blob_free(&blob2);
 573
 574         cli_set_session_key(cli, session_key_krb5);
 575
 576         data_blob_free(&negTokenTarg);
 577         data_blob_free(&session_key_krb5);
 578
 579         if (cli_is_error(cli)) {
 580                 if (NT_STATUS_IS_OK(cli_nt_error(cli))) {
 581                         return ADS_ERROR_NT(NT_STATUS_UNSUCCESSFUL);
 582                 }
 583         }
 584         return ADS_ERROR_NT(cli_nt_error(cli));
 585 }
 586 #endif  /* HAVE_KRB5 */
 587
 588
 589 /****************************************************************************
 590  Do a spnego/NTLMSSP encrypted session setup.
 591 ****************************************************************************/
 592
 593 static NTSTATUS cli_session_setup_ntlmssp(struct cli_state *cli, const char *user,
 594                                           const char *pass, const char *domain)
 595 {
 596         struct ntlmssp_state *ntlmssp_state;
 597         NTSTATUS nt_status;
 598         int turn = 1;
 599         DATA_BLOB msg1;
 600         DATA_BLOB blob = data_blob(NULL, 0);
 601         DATA_BLOB blob_in = data_blob(NULL, 0);
 602         DATA_BLOB blob_out = data_blob(NULL, 0);
 603
 604         cli_temp_set_signing(cli);
 605
 606         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_client_start(&ntlmssp_state))) {
 607                 return nt_status;
 608         }
 609         ntlmssp_want_feature(ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 610
 611         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 612                 return nt_status;
 613         }
 614         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 615                 return nt_status;
 616         }
 617         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_password(ntlmssp_state, pass))) {
 618                 return nt_status;
 619         }
 620
 621         do {
 622                 nt_status = ntlmssp_update(ntlmssp_state,
 623                                                   blob_in, &blob_out);
 624                 data_blob_free(&blob_in);
 625                 if (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(nt_status)) {
 626                         if (turn == 1) {
 627                                 /* and wrap it in a SPNEGO wrapper */
 628                                 msg1 = gen_negTokenInit(OID_NTLMSSP, blob_out);
 629                         } else {
 630                                 /* wrap it in SPNEGO */
 631                                 msg1 = spnego_gen_auth(blob_out);
 632                         }
 633
 634                         /* now send that blob on its way */
 635                         if (!cli_session_setup_blob_send(cli, msg1)) {
 636                                 DEBUG(3, ("Failed to send NTLMSSP/SPNEGO blob to server!\n"));
 637                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 638                         } else {
 639                                 data_blob_free(&msg1);
 640
 641                                 blob = cli_session_setup_blob_receive(cli);
 642
 643                                 nt_status = cli_nt_error(cli);
 644                                 if (cli_is_error(cli) && NT_STATUS_IS_OK(nt_status)) {
 645                                         if (cli->smb_rw_error == READ_BAD_SIG) {
 646                                                 nt_status = NT_STATUS_ACCESS_DENIED;
 647                                         } else {
 648                                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 649                                         }
 650                                 }
 651                         }
 652                 }
 653
 654                 if (!blob.length) {
 655                         if (NT_STATUS_IS_OK(nt_status)) {
 656                                 nt_status = NT_STATUS_UNSUCCESSFUL;
 657                         }
 658                 } else if ((turn == 1) &&
 659                            NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 660                         DATA_BLOB tmp_blob = data_blob(NULL, 0);
 661                         /* the server might give us back two challenges */
 662                         if (!spnego_parse_challenge(blob, &blob_in,
 663                                                     &tmp_blob)) {
 664                                 DEBUG(3,("Failed to parse challenges\n"));
 665                                 nt_status = NT_STATUS_INVALID_PARAMETER;
 666                         }
 667                         data_blob_free(&tmp_blob);
 668                 } else {
 669                         if (!spnego_parse_auth_response(blob, nt_status,
 670                                                         &blob_in)) {
 671                                 DEBUG(3,("Failed to parse auth response\n"));
 672                                 if (NT_STATUS_IS_OK(nt_status)
 673                                     || NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED))
 674                                         nt_status = NT_STATUS_INVALID_PARAMETER;
 675                         }
 676                 }
 677                 data_blob_free(&blob);
 678                 data_blob_free(&blob_out);
 679                 turn++;
 680         } while (NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 681
 682         if (NT_STATUS_IS_OK(nt_status)) {
 683
 684                 DATA_BLOB key = data_blob(ntlmssp_state->session_key.data,
 685                                           ntlmssp_state->session_key.length);
 686                 DATA_BLOB null_blob = data_blob(NULL, 0);
 687                 BOOL res;
 688
 689                 fstrcpy(cli->server_domain, ntlmssp_state->server_domain);
 690                 cli_set_session_key(cli, ntlmssp_state->session_key);
 691
 692                 res = cli_simple_set_signing(cli, key, null_blob);
 693
 694                 data_blob_free(&key);
 695
 696                 if (res) {
 697
 698                         /* 'resign' the last message, so we get the right sequence numbers
 699                            for checking the first reply from the server */
 700                         cli_calculate_sign_mac(cli);
 701
 702                         if (!cli_check_sign_mac(cli)) {
 703                                 nt_status = NT_STATUS_ACCESS_DENIED;
 704                         }
 705                 }
 706         }
 707
 708         /* we have a reference conter on ntlmssp_state, if we are signing
 709            then the state will be kept by the signing engine */
 710
 711         ntlmssp_end(&ntlmssp_state);
 712
 713         return nt_status;
 714 }
 715
 716 /****************************************************************************
 717  Do a spnego encrypted session setup.
 718 ****************************************************************************/
 719
 720 ADS_STATUS cli_session_setup_spnego(struct cli_state *cli, const char *user,
 721                               const char *pass, const char *domain)
 722 {
 723         char *principal;
 724         char *OIDs[ASN1_MAX_OIDS];
 725         int i;
 726 #ifdef HAVE_KRB5
 727         BOOL got_kerberos_mechanism = False;
 728 #endif
 729         DATA_BLOB blob;
 730
 731         DEBUG(3,("Doing spnego session setup (blob length=%lu)\n", (unsigned long)cli->secblob.length));
 732
 733         /* the server might not even do spnego */
 734         if (cli->secblob.length <= 16) {
 735                 DEBUG(3,("server didn't supply a full spnego negprot\n"));
 736                 goto ntlmssp;
 737         }
 738
 739 #if 0
 740         file_save("negprot.dat", cli->secblob.data, cli->secblob.length);
 741 #endif
 742
 743         /* there is 16 bytes of GUID before the real spnego packet starts */
 744         blob = data_blob(cli->secblob.data+16, cli->secblob.length-16);
 745
 746         /* the server sent us the first part of the SPNEGO exchange in the negprot
 747            reply */
 748         if (!spnego_parse_negTokenInit(blob, OIDs, &principal)) {
 749                 data_blob_free(&blob);
 750                 return ADS_ERROR_NT(NT_STATUS_INVALID_PARAMETER);
 751         }
 752         data_blob_free(&blob);
 753
 754         /* make sure the server understands kerberos */
 755         for (i=0;OIDs[i];i++) {
 756                 DEBUG(3,("got OID=%s\n", OIDs[i]));
 757 #ifdef HAVE_KRB5
 758                 if (strcmp(OIDs[i], OID_KERBEROS5_OLD) == 0 ||
 759                     strcmp(OIDs[i], OID_KERBEROS5) == 0) {
 760                         got_kerberos_mechanism = True;
 761                 }
 762 #endif
 763                 free(OIDs[i]);
 764         }
 765
 766         DEBUG(3,("got principal=%s\n", principal ? principal : "<null>"));
 767
 768 #ifdef HAVE_KRB5
 769         if (got_kerberos_mechanism && (principal == NULL)) {
 770                 /*
 771                  * It is WRONG to depend on the principal sent in the negprot
 772                  * reply, but right now we do it. So for safety (don't
 773                  * segfault later) disable Kerberos when no principal was
 774                  * sent. -- VL
 775                  */
 776                 DEBUG(1, ("Kerberos mech was offered, but no principal was sent\n"));
 777                 DEBUGADD(1, ("Disabling Kerberos\n"));
 778                 cli->use_kerberos = False;
 779         }
 780 #endif
 781
 782         fstrcpy(cli->user_name, user);
 783
 784 #ifdef HAVE_KRB5
 785         /* If password is set we reauthenticate to kerberos server
 786          * and do not store results */
 787
 788         if (got_kerberos_mechanism && cli->use_kerberos) {
 789                 ADS_STATUS rc;
 790
 791                 if (pass && *pass) {
 792                         int ret;
 793
 794                         use_in_memory_ccache();
 795                         ret = kerberos_kinit_password(user, pass, 0 /* no time correction for now */, NULL);
 796
 797                         if (ret){
 798                                 SAFE_FREE(principal);
 799                                 DEBUG(0, ("Kinit failed: %s\n", error_message(ret)));
 800                                 if (cli->fallback_after_kerberos)
 801                                         goto ntlmssp;
 802                                 return ADS_ERROR_KRB5(ret);
 803                         }
 804                 }
 805
 806                 rc = cli_session_setup_kerberos(cli, principal, domain);
 807                 if (ADS_ERR_OK(rc) || !cli->fallback_after_kerberos) {
 808                         SAFE_FREE(principal);
 809                         return rc;
 810                 }
 811         }
 812 #endif
 813
 814         SAFE_FREE(principal);
 815
 816 ntlmssp:
 817
 818         return ADS_ERROR_NT(cli_session_setup_ntlmssp(cli, user, pass, domain));
 819 }
 820
 821 /****************************************************************************
 822  Send a session setup. The username and workgroup is in UNIX character
 823  format and must be converted to DOS codepage format before sending. If the
 824  password is in plaintext, the same should be done.
 825 ****************************************************************************/
 826
 827 NTSTATUS cli_session_setup(struct cli_state *cli,
 828                            const char *user,
 829                            const char *pass, int passlen,
 830                            const char *ntpass, int ntpasslen,
 831                            const char *workgroup)
 832 {
 833         char *p;
 834         fstring user2;
 835
 836         /* allow for workgroups as part of the username */
 837         fstrcpy(user2, user);
 838         if ((p=strchr_m(user2,'\\')) || (p=strchr_m(user2,'/')) ||
 839             (p=strchr_m(user2,*lp_winbind_separator()))) {
 840                 *p = 0;
 841                 user = p+1;
 842                 workgroup = user2;
 843         }
 844
 845         if (cli->protocol < PROTOCOL_LANMAN1) {
 846                 return NT_STATUS_OK;
 847         }
 848
 849         /* now work out what sort of session setup we are going to
 850            do. I have split this into separate functions to make the
 851            flow a bit easier to understand (tridge) */
 852
 853         /* if its an older server then we have to use the older request format */
 854
 855         if (cli->protocol < PROTOCOL_NT1) {
 856                 if (!lp_client_lanman_auth() && passlen != 24 && (*pass)) {
 857                         DEBUG(1, ("Server requested LM password but 'client lanman auth'"
 858                                   " is disabled\n"));
 859                         return NT_STATUS_ACCESS_DENIED;
 860                 }
 861
 862                 if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0 &&
 863                     !lp_client_plaintext_auth() && (*pass)) {
 864                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 865                                   " is disabled\n"));
 866                         return NT_STATUS_ACCESS_DENIED;
 867                 }
 868
 869                 return cli_session_setup_lanman2(cli, user, pass, passlen,
 870                                                  workgroup);
 871         }
 872
 873         /* if no user is supplied then we have to do an anonymous connection.
 874            passwords are ignored */
 875
 876         if (!user || !*user)
 877                 return cli_session_setup_guest(cli);
 878
 879         /* if the server is share level then send a plaintext null
 880            password at this point. The password is sent in the tree
 881            connect */
 882
 883         if ((cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) == 0)
 884                 return cli_session_setup_plaintext(cli, user, "", workgroup);
 885
 886         /* if the server doesn't support encryption then we have to use
 887            plaintext. The second password is ignored */
 888
 889         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) == 0) {
 890                 if (!lp_client_plaintext_auth() && (*pass)) {
 891                         DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 892                                   " is disabled\n"));
 893                         return NT_STATUS_ACCESS_DENIED;
 894                 }
 895                 return cli_session_setup_plaintext(cli, user, pass, workgroup);
 896         }
 897
 898         /* if the server supports extended security then use SPNEGO */
 899
 900         if (cli->capabilities & CAP_EXTENDED_SECURITY) {
 901                 ADS_STATUS status = cli_session_setup_spnego(cli, user, pass, workgroup);
 902                 if (!ADS_ERR_OK(status)) {
 903                         DEBUG(3, ("SPNEGO login failed: %s\n", ads_errstr(status)));
 904                         return ads_ntstatus(status);
 905                 }
 906         } else {
 907                 NTSTATUS status;
 908
 909                 /* otherwise do a NT1 style session setup */
 910                 status = cli_session_setup_nt1(cli, user, pass, passlen,
 911                                                ntpass, ntpasslen, workgroup);
 912                 if (!NT_STATUS_IS_OK(status)) {
 913                         DEBUG(3,("cli_session_setup: NT1 session setup "
 914                                  "failed: %s\n", nt_errstr(status)));
 915                         return status;
 916                 }
 917         }
 918
 919         if (strstr(cli->server_type, "Samba")) {
 920                 cli->is_samba = True;
 921         }
 922
 923         return NT_STATUS_OK;
 924
 925 }
 926
 927 /****************************************************************************
 928  Send a uloggoff.
 929 *****************************************************************************/
 930
 931 BOOL cli_ulogoff(struct cli_state *cli)
 932 {
 933         memset(cli->outbuf,'\0',smb_size);
 934         set_message(cli->outbuf,2,0,True);
 935         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
 936         cli_setup_packet(cli);
 937         SSVAL(cli->outbuf,smb_vwv0,0xFF);
 938         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
 939
 940         cli_send_smb(cli);
 941         if (!cli_receive_smb(cli))
 942                 return False;
 943
 944         if (cli_is_error(cli)) {
 945                 return False;
 946         }
 947
 948         cli->cnum = -1;
 949         return True;
 950 }
 951
 952 /****************************************************************************
 953  Send a tconX.
 954 ****************************************************************************/
 955
 956 BOOL cli_send_tconX(struct cli_state *cli,
 957                     const char *share, const char *dev, const char *pass, int passlen)
 958 {
 959         fstring fullshare, pword;
 960         char *p;
 961         memset(cli->outbuf,'\0',smb_size);
 962         memset(cli->inbuf,'\0',smb_size);
 963
 964         fstrcpy(cli->share, share);
 965
 966         /* in user level security don't send a password now */
 967         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
 968                 passlen = 1;
 969                 pass = "";
 970         } else if (!pass) {
 971                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
 972                 return False;
 973         }
 974
 975         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
 976             *pass && passlen != 24) {
 977                 if (!lp_client_lanman_auth()) {
 978                         DEBUG(1, ("Server requested LANMAN password (share-level security) but 'client use lanman auth'"
 979                                   " is disabled\n"));
 980                         return False;
 981                 }
 982
 983                 /*
 984                  * Non-encrypted passwords - convert to DOS codepage before encryption.
 985                  */
 986                 passlen = 24;
 987                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
 988         } else {
 989                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
 990                         if (!lp_client_plaintext_auth() && (*pass)) {
 991                                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
 992                                           " is disabled\n"));
 993                                 return False;
 994                         }
 995
 996                         /*
 997                          * Non-encrypted passwords - convert to DOS codepage before using.
 998                          */
 999                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1000
1001                 } else {
1002                         if (passlen) {
1003                                 memcpy(pword, pass, passlen);
1004                         }
1005                 }
1006         }
1007
1008         slprintf(fullshare, sizeof(fullshare)-1,
1009                  "\\\\%s\\%s", cli->desthost, share);
1010
1011         set_message(cli->outbuf,4, 0, True);
1012         SCVAL(cli->outbuf,smb_com,SMBtconX);
1013         cli_setup_packet(cli);
1014
1015         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1016         SSVAL(cli->outbuf,smb_vwv3,passlen);
1017
1018         p = smb_buf(cli->outbuf);
1019         if (passlen) {
1020                 memcpy(p,pword,passlen);
1021         }
1022         p += passlen;
1023         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1024         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1025
1026         cli_setup_bcc(cli, p);
1027
1028         cli_send_smb(cli);
1029         if (!cli_receive_smb(cli))
1030                 return False;
1031
1032         if (cli_is_error(cli))
1033                 return False;
1034
1035         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1036
1037         if (cli->protocol >= PROTOCOL_NT1 &&
1038             smb_buflen(cli->inbuf) == 3) {
1039                 /* almost certainly win95 - enable bug fixes */
1040                 cli->win95 = True;
1041         }
1042
1043         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1044         /* Avoids issues when connecting to Win9x boxes sharing files */
1045
1046         cli->dfsroot = False;
1047         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1048                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1049
1050         cli->cnum = SVAL(cli->inbuf,smb_tid);
1051         return True;
1052 }
1053
1054 /****************************************************************************
1055  Send a tree disconnect.
1056 ****************************************************************************/
1057
1058 BOOL cli_tdis(struct cli_state *cli)
1059 {
1060         memset(cli->outbuf,'\0',smb_size);
1061         set_message(cli->outbuf,0,0,True);
1062         SCVAL(cli->outbuf,smb_com,SMBtdis);
1063         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1064         cli_setup_packet(cli);
1065
1066         cli_send_smb(cli);
1067         if (!cli_receive_smb(cli))
1068                 return False;
1069
1070         if (cli_is_error(cli)) {
1071                 return False;
1072         }
1073
1074         cli->cnum = -1;
1075         return True;
1076 }
1077
1078 /****************************************************************************
1079  Send a negprot command.
1080 ****************************************************************************/
1081
1082 void cli_negprot_send(struct cli_state *cli)
1083 {
1084         char *p;
1085         int numprots;
1086
1087         if (cli->protocol < PROTOCOL_NT1)
1088                 cli->use_spnego = False;
1089
1090         memset(cli->outbuf,'\0',smb_size);
1091
1092         /* setup the protocol strings */
1093         set_message(cli->outbuf,0,0,True);
1094
1095         p = smb_buf(cli->outbuf);
1096         for (numprots=0;
1097              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1098              numprots++) {
1099                 *p++ = 2;
1100                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1101         }
1102
1103         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1104         cli_setup_bcc(cli, p);
1105         cli_setup_packet(cli);
1106
1107         SCVAL(smb_buf(cli->outbuf),0,2);
1108
1109         cli_send_smb(cli);
1110 }
1111
1112 /****************************************************************************
1113  Send a negprot command.
1114 ****************************************************************************/
1115
1116 BOOL cli_negprot(struct cli_state *cli)
1117 {
1118         char *p;
1119         int numprots;
1120         int plength;
1121
1122         if (cli->protocol < PROTOCOL_NT1)
1123                 cli->use_spnego = False;
1124
1125         memset(cli->outbuf,'\0',smb_size);
1126
1127         /* setup the protocol strings */
1128         for (plength=0,numprots=0;
1129              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1130              numprots++)
1131                 plength += strlen(prots[numprots].name)+2;
1132
1133         set_message(cli->outbuf,0,plength,True);
1134
1135         p = smb_buf(cli->outbuf);
1136         for (numprots=0;
1137              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1138              numprots++) {
1139                 *p++ = 2;
1140                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1141         }
1142
1143         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1144         cli_setup_packet(cli);
1145
1146         SCVAL(smb_buf(cli->outbuf),0,2);
1147
1148         cli_send_smb(cli);
1149         if (!cli_receive_smb(cli))
1150                 return False;
1151
1152         show_msg(cli->inbuf);
1153
1154         if (cli_is_error(cli) ||
1155             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1156                 return(False);
1157         }
1158
1159         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1160
1161         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1162                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1163                 return False;
1164         }
1165
1166         if (cli->protocol >= PROTOCOL_NT1) {
1167                 struct timespec ts;
1168                 /* NT protocol */
1169                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1170                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1171                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1172                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1173                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1174                 cli->serverzone *= 60;
1175                 /* this time arrives in real GMT */
1176                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1177                 cli->servertime = ts.tv_sec;
1178                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1179                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1180                 if (cli->capabilities & CAP_RAW_MODE) {
1181                         cli->readbraw_supported = True;
1182                         cli->writebraw_supported = True;
1183                 }
1184                 /* work out if they sent us a workgroup */
1185                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1186                     smb_buflen(cli->inbuf) > 8) {
1187                         clistr_pull(cli, cli->server_domain,
1188                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1189                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1190                 }
1191
1192                 /*
1193                  * As signing is slow we only turn it on if either the client or
1194                  * the server require it. JRA.
1195                  */
1196
1197                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1198                         /* Fail if server says signing is mandatory and we don't want to support it. */
1199                         if (!cli->sign_info.allow_smb_signing) {
1200                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1201                                 return False;
1202                         }
1203                         cli->sign_info.negotiated_smb_signing = True;
1204                         cli->sign_info.mandatory_signing = True;
1205                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1206                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1207                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1208                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1209                                 return False;
1210                         }
1211                         cli->sign_info.negotiated_smb_signing = True;
1212                         cli->sign_info.mandatory_signing = True;
1213                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1214                         cli->sign_info.negotiated_smb_signing = True;
1215                 }
1216
1217                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1218                         SAFE_FREE(cli->outbuf);
1219                         SAFE_FREE(cli->inbuf);
1220                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1221                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1222                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
1223                 }
1224
1225         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1226                 cli->use_spnego = False;
1227                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1228                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1229                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1230                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1231                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1232                 cli->serverzone *= 60;
1233                 /* this time is converted to GMT by make_unix_date */
1234                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1235                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1236                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1237                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1238         } else {
1239                 /* the old core protocol */
1240                 cli->use_spnego = False;
1241                 cli->sec_mode = 0;
1242                 cli->serverzone = get_time_zone(time(NULL));
1243         }
1244
1245         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1246
1247         /* a way to force ascii SMB */
1248         if (getenv("CLI_FORCE_ASCII"))
1249                 cli->capabilities &= ~CAP_UNICODE;
1250
1251         return True;
1252 }
1253
1254 /****************************************************************************
1255  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1256 ****************************************************************************/
1257
1258 BOOL cli_session_request(struct cli_state *cli,
1259                          struct nmb_name *calling, struct nmb_name *called)
1260 {
1261         char *p;
1262         int len = 4;
1263
1264         memcpy(&(cli->calling), calling, sizeof(*calling));
1265         memcpy(&(cli->called ), called , sizeof(*called ));
1266
1267         /* put in the destination name */
1268         p = cli->outbuf+len;
1269         name_mangle(cli->called .name, p, cli->called .name_type);
1270         len += name_len(p);
1271
1272         /* and my name */
1273         p = cli->outbuf+len;
1274         name_mangle(cli->calling.name, p, cli->calling.name_type);
1275         len += name_len(p);
1276
1277         /* 445 doesn't have session request */
1278         if (cli->port == 445)
1279                 return True;
1280
1281         /* send a session request (RFC 1002) */
1282         /* setup the packet length
1283          * Remove four bytes from the length count, since the length
1284          * field in the NBT Session Service header counts the number
1285          * of bytes which follow.  The cli_send_smb() function knows
1286          * about this and accounts for those four bytes.
1287          * CRH.
1288          */
1289         len -= 4;
1290         _smb_setlen(cli->outbuf,len);
1291         SCVAL(cli->outbuf,0,0x81);
1292
1293         cli_send_smb(cli);
1294         DEBUG(5,("Sent session request\n"));
1295
1296         if (!cli_receive_smb(cli))
1297                 return False;
1298
1299         if (CVAL(cli->inbuf,0) == 0x84) {
1300                 /* C. Hoch  9/14/95 Start */
1301                 /* For information, here is the response structure.
1302                  * We do the byte-twiddling to for portability.
1303                 struct RetargetResponse{
1304                 unsigned char type;
1305                 unsigned char flags;
1306                 int16 length;
1307                 int32 ip_addr;
1308                 int16 port;
1309                 };
1310                 */
1311                 int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1312                 /* SESSION RETARGET */
1313                 putip((char *)&cli->dest_ip,cli->inbuf+4);
1314
1315                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
1316                 if (cli->fd == -1)
1317                         return False;
1318
1319                 DEBUG(3,("Retargeted\n"));
1320
1321                 set_socket_options(cli->fd,user_socket_options);
1322
1323                 /* Try again */
1324                 {
1325                         static int depth;
1326                         BOOL ret;
1327                         if (depth > 4) {
1328                                 DEBUG(0,("Retarget recursion - failing\n"));
1329                                 return False;
1330                         }
1331                         depth++;
1332                         ret = cli_session_request(cli, calling, called);
1333                         depth--;
1334                         return ret;
1335                 }
1336         } /* C. Hoch 9/14/95 End */
1337
1338         if (CVAL(cli->inbuf,0) != 0x82) {
1339                 /* This is the wrong place to put the error... JRA. */
1340                 cli->rap_error = CVAL(cli->inbuf,4);
1341                 return False;
1342         }
1343         return(True);
1344 }
1345
1346 /****************************************************************************
1347  Open the client sockets.
1348 ****************************************************************************/
1349
1350 BOOL cli_connect(struct cli_state *cli, const char *host, struct in_addr *ip)
1351 {
1352         int name_type = 0x20;
1353         char *p;
1354
1355         /* reasonable default hostname */
1356         if (!host) host = "*SMBSERVER";
1357
1358         fstrcpy(cli->desthost, host);
1359
1360         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1361         if ((p = strchr(cli->desthost, '#'))) {
1362                 name_type = strtol(p+1, NULL, 16);
1363                 *p = 0;
1364         }
1365
1366         if (!ip || is_zero_ip(*ip)) {
1367                 if (!resolve_name(cli->desthost, &cli->dest_ip, name_type)) {
1368                         return False;
1369                 }
1370                 if (ip) *ip = cli->dest_ip;
1371         } else {
1372                 cli->dest_ip = *ip;
1373         }
1374
1375         if (getenv("LIBSMB_PROG")) {
1376                 cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1377         } else {
1378                 /* try 445 first, then 139 */
1379                 int port = cli->port?cli->port:445;
1380                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1381                                           port, cli->timeout);
1382                 if (cli->fd == -1 && cli->port == 0) {
1383                         port = 139;
1384                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1385                                                   port, cli->timeout);
1386                 }
1387                 if (cli->fd != -1)
1388                         cli->port = port;
1389         }
1390         if (cli->fd == -1) {
1391                 DEBUG(1,("Error connecting to %s (%s)\n",
1392                          ip?inet_ntoa(*ip):host,strerror(errno)));
1393                 return False;
1394         }
1395
1396         set_socket_options(cli->fd,user_socket_options);
1397
1398         return True;
1399 }
1400
1401 /**
1402    establishes a connection to after the negprot.
1403    @param output_cli A fully initialised cli structure, non-null only on success
1404    @param dest_host The netbios name of the remote host
1405    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1406    @param port (optional) The destination port (0 for default)
1407    @param retry BOOL. Did this connection fail with a retryable error ?
1408
1409 */
1410 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1411                               const char *my_name,
1412                               const char *dest_host,
1413                               struct in_addr *dest_ip, int port,
1414                               int signing_state, int flags,
1415                               BOOL *retry)
1416 {
1417         NTSTATUS nt_status;
1418         struct nmb_name calling;
1419         struct nmb_name called;
1420         struct cli_state *cli;
1421         struct in_addr ip;
1422
1423         if (retry)
1424                 *retry = False;
1425
1426         if (!my_name)
1427                 my_name = global_myname();
1428
1429         if (!(cli = cli_initialise())) {
1430                 return NT_STATUS_NO_MEMORY;
1431         }
1432
1433         make_nmb_name(&calling, my_name, 0x0);
1434         make_nmb_name(&called , dest_host, 0x20);
1435
1436         if (cli_set_port(cli, port) != port) {
1437                 cli_shutdown(cli);
1438                 return NT_STATUS_UNSUCCESSFUL;
1439         }
1440
1441         cli_set_timeout(cli, 10000); /* 10 seconds. */
1442
1443         if (dest_ip)
1444                 ip = *dest_ip;
1445         else
1446                 ZERO_STRUCT(ip);
1447
1448 again:
1449
1450         DEBUG(3,("Connecting to host=%s\n", dest_host));
1451
1452         if (!cli_connect(cli, dest_host, &ip)) {
1453                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s)\n",
1454                          nmb_namestr(&called), inet_ntoa(ip)));
1455                 cli_shutdown(cli);
1456                 if (is_zero_ip(ip)) {
1457                         return NT_STATUS_BAD_NETWORK_NAME;
1458                 } else {
1459                         return NT_STATUS_CONNECTION_REFUSED;
1460                 }
1461         }
1462
1463         if (retry)
1464                 *retry = True;
1465
1466         if (!cli_session_request(cli, &calling, &called)) {
1467                 char *p;
1468                 DEBUG(1,("session request to %s failed (%s)\n",
1469                          called.name, cli_errstr(cli)));
1470                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1471                         *p = 0;
1472                         goto again;
1473                 }
1474                 if (strcmp(called.name, "*SMBSERVER")) {
1475                         make_nmb_name(&called , "*SMBSERVER", 0x20);
1476                         goto again;
1477                 }
1478                 return NT_STATUS_BAD_NETWORK_NAME;
1479         }
1480
1481         cli_setup_signing_state(cli, signing_state);
1482
1483         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1484                 cli->use_spnego = False;
1485         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1486                 cli->use_kerberos = True;
1487
1488         if (!cli_negprot(cli)) {
1489                 DEBUG(1,("failed negprot\n"));
1490                 nt_status = cli_nt_error(cli);
1491                 if (NT_STATUS_IS_OK(nt_status)) {
1492                         nt_status = NT_STATUS_UNSUCCESSFUL;
1493                 }
1494                 cli_shutdown(cli);
1495                 return nt_status;
1496         }
1497
1498         *output_cli = cli;
1499         return NT_STATUS_OK;
1500 }
1501
1502
1503 /**
1504    establishes a connection right up to doing tconX, password specified.
1505    @param output_cli A fully initialised cli structure, non-null only on success
1506    @param dest_host The netbios name of the remote host
1507    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1508    @param port (optional) The destination port (0 for default)
1509    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1510    @param service_type The 'type' of serivice.
1511    @param user Username, unix string
1512    @param domain User's domain
1513    @param password User's password, unencrypted unix string.
1514    @param retry BOOL. Did this connection fail with a retryable error ?
1515 */
1516
1517 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1518                              const char *my_name,
1519                              const char *dest_host,
1520                              struct in_addr *dest_ip, int port,
1521                              const char *service, const char *service_type,
1522                              const char *user, const char *domain,
1523                              const char *password, int flags,
1524                              int signing_state,
1525                              BOOL *retry)
1526 {
1527         NTSTATUS nt_status;
1528         struct cli_state *cli = NULL;
1529         int pw_len = password ? strlen(password)+1 : 0;
1530
1531         *output_cli = NULL;
1532
1533         if (password == NULL) {
1534                 password = "";
1535         }
1536
1537         nt_status = cli_start_connection(&cli, my_name, dest_host,
1538                                          dest_ip, port, signing_state, flags, retry);
1539
1540         if (!NT_STATUS_IS_OK(nt_status)) {
1541                 return nt_status;
1542         }
1543
1544         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1545                                       pw_len, domain);
1546         if (!NT_STATUS_IS_OK(nt_status)) {
1547
1548                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1549                         DEBUG(1,("failed session setup with %s\n",
1550                                  nt_errstr(nt_status)));
1551                         cli_shutdown(cli);
1552                         return nt_status;
1553                 }
1554
1555                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1556                 if (!NT_STATUS_IS_OK(nt_status)) {
1557                         DEBUG(1,("anonymous failed session setup with %s\n",
1558                                  nt_errstr(nt_status)));
1559                         cli_shutdown(cli);
1560                         return nt_status;
1561                 }
1562         }
1563
1564         if (service) {
1565                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1566                         nt_status = cli_nt_error(cli);
1567                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1568                         cli_shutdown(cli);
1569                         if (NT_STATUS_IS_OK(nt_status)) {
1570                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1571                         }
1572                         return nt_status;
1573                 }
1574         }
1575
1576         cli_init_creds(cli, user, domain, password);
1577
1578         *output_cli = cli;
1579         return NT_STATUS_OK;
1580 }
1581
1582 /****************************************************************************
1583  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1584 ****************************************************************************/
1585
1586 BOOL attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1587                                      struct in_addr *pdest_ip)
1588 {
1589         struct nmb_name calling, called;
1590
1591         make_nmb_name(&calling, srchost, 0x0);
1592
1593         /*
1594          * If the called name is an IP address
1595          * then use *SMBSERVER immediately.
1596          */
1597
1598         if(is_ipaddress(desthost)) {
1599                 make_nmb_name(&called, "*SMBSERVER", 0x20);
1600         } else {
1601                 make_nmb_name(&called, desthost, 0x20);
1602         }
1603
1604         if (!cli_session_request(*ppcli, &calling, &called)) {
1605                 struct nmb_name smbservername;
1606
1607                 make_nmb_name(&smbservername , "*SMBSERVER", 0x20);
1608
1609                 /*
1610                  * If the name wasn't *SMBSERVER then
1611                  * try with *SMBSERVER if the first name fails.
1612                  */
1613
1614                 if (nmb_name_equal(&called, &smbservername)) {
1615
1616                         /*
1617                          * The name used was *SMBSERVER, don't bother with another name.
1618                          */
1619
1620                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1621 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1622                         return False;
1623                 }
1624
1625                 /* Try again... */
1626                 cli_shutdown(*ppcli);
1627
1628                 *ppcli = cli_initialise();
1629                 if (!*ppcli) {
1630                         /* Out of memory... */
1631                         return False;
1632                 }
1633
1634                 if (!cli_connect(*ppcli, desthost, pdest_ip) ||
1635                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1636                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1637 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1638                         return False;
1639                 }
1640         }
1641
1642         return True;
1643 }
1644
1645
1646
1647
1648
1649 /****************************************************************************
1650  Send an old style tcon.
1651 ****************************************************************************/
1652 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1653                       const char *service, const char *pass, const char *dev,
1654                       uint16 *max_xmit, uint16 *tid)
1655 {
1656         char *p;
1657
1658         if (!lp_client_plaintext_auth() && (*pass)) {
1659                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1660                           " is disabled\n"));
1661                 return NT_STATUS_ACCESS_DENIED;
1662         }
1663
1664         memset(cli->outbuf,'\0',smb_size);
1665         memset(cli->inbuf,'\0',smb_size);
1666
1667         set_message(cli->outbuf, 0, 0, True);
1668         SCVAL(cli->outbuf,smb_com,SMBtcon);
1669         cli_setup_packet(cli);
1670
1671         p = smb_buf(cli->outbuf);
1672         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1673         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1674         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1675
1676         cli_setup_bcc(cli, p);
1677
1678         cli_send_smb(cli);
1679         if (!cli_receive_smb(cli)) {
1680                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1681         }
1682
1683         if (cli_is_error(cli)) {
1684                 return cli_nt_error(cli);
1685         }
1686
1687         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1688         *tid = SVAL(cli->inbuf, smb_vwv1);
1689
1690         return NT_STATUS_OK;
1691 }
1692
1693 /* Return a cli_state pointing at the IPC$ share for the given server */
1694
1695 struct cli_state *get_ipc_connect(char *server, struct in_addr *server_ip,
1696                                          struct user_auth_info *user_info)
1697 {
1698         struct cli_state *cli;
1699         pstring myname;
1700         NTSTATUS nt_status;
1701
1702         get_myname(myname);
1703
1704         nt_status = cli_full_connection(&cli, myname, server, server_ip, 0, "IPC$", "IPC",
1705                                         user_info->username, lp_workgroup(), user_info->password,
1706                                         CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK, Undefined, NULL);
1707
1708         if (NT_STATUS_IS_OK(nt_status)) {
1709                 return cli;
1710         } else if (is_ipaddress(server)) {
1711             /* windows 9* needs a correct NMB name for connections */
1712             fstring remote_name;
1713
1714             if (name_status_find("*", 0, 0, *server_ip, remote_name)) {
1715                 cli = get_ipc_connect(remote_name, server_ip, user_info);
1716                 if (cli)
1717                     return cli;
1718             }
1719         }
1720         return NULL;
1721 }
1722
1723 /*
1724  * Given the IP address of a master browser on the network, return its
1725  * workgroup and connect to it.
1726  *
1727  * This function is provided to allow additional processing beyond what
1728  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1729  * browsers and obtain each master browsers' list of domains (in case the
1730  * first master browser is recently on the network and has not yet
1731  * synchronized with other master browsers and therefore does not yet have the
1732  * entire network browse list)
1733  */
1734
1735 struct cli_state *get_ipc_connect_master_ip(struct ip_service * mb_ip, pstring workgroup, struct user_auth_info *user_info)
1736 {
1737         static fstring name;
1738         struct cli_state *cli;
1739         struct in_addr server_ip;
1740
1741         DEBUG(99, ("Looking up name of master browser %s\n",
1742                    inet_ntoa(mb_ip->ip)));
1743
1744         /*
1745          * Do a name status query to find out the name of the master browser.
1746          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1747          * master browser will not respond to a wildcard query (or, at least,
1748          * an NT4 server acting as the domain master browser will not).
1749          *
1750          * We might be able to use ONLY the query on MSBROWSE, but that's not
1751          * yet been tested with all Windows versions, so until it is, leave
1752          * the original wildcard query as the first choice and fall back to
1753          * MSBROWSE if the wildcard query fails.
1754          */
1755         if (!name_status_find("*", 0, 0x1d, mb_ip->ip, name) &&
1756             !name_status_find(MSBROWSE, 1, 0x1d, mb_ip->ip, name)) {
1757
1758                 DEBUG(99, ("Could not retrieve name status for %s\n",
1759                            inet_ntoa(mb_ip->ip)));
1760                 return NULL;
1761         }
1762
1763         if (!find_master_ip(name, &server_ip)) {
1764                 DEBUG(99, ("Could not find master ip for %s\n", name));
1765                 return NULL;
1766         }
1767
1768                 pstrcpy(workgroup, name);
1769
1770                 DEBUG(4, ("found master browser %s, %s\n",
1771                   name, inet_ntoa(mb_ip->ip)));
1772
1773                 cli = get_ipc_connect(inet_ntoa(server_ip), &server_ip, user_info);
1774
1775                 return cli;
1776
1777 }
1778
1779 /*
1780  * Return the IP address and workgroup of a master browser on the network, and
1781  * connect to it.
1782  */
1783
1784 struct cli_state *get_ipc_connect_master_ip_bcast(pstring workgroup, struct user_auth_info *user_info)
1785 {
1786         struct ip_service *ip_list;
1787         struct cli_state *cli;
1788         int i, count;
1789
1790         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1791
1792         /* Go looking for workgroups by broadcasting on the local network */
1793
1794         if (!name_resolve_bcast(MSBROWSE, 1, &ip_list, &count)) {
1795                 DEBUG(99, ("No master browsers responded\n"));
1796                 return False;
1797         }
1798
1799         for (i = 0; i < count; i++) {
1800             DEBUG(99, ("Found master browser %s\n", inet_ntoa(ip_list[i].ip)));
1801
1802             cli = get_ipc_connect_master_ip(&ip_list[i], workgroup, user_info);
1803             if (cli)
1804                     return(cli);
1805         }
1806
1807         return NULL;
1808 }