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(NULL,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(NULL,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(NULL,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(NULL,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(NULL,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 counter 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  Send a uloggoff.
 985 *****************************************************************************/
 986
 987 BOOL cli_ulogoff(struct cli_state *cli)
 988 {
 989         memset(cli->outbuf,'\0',smb_size);
 990         set_message(NULL,cli->outbuf,2,0,True);
 991         SCVAL(cli->outbuf,smb_com,SMBulogoffX);
 992         cli_setup_packet(cli);
 993         SSVAL(cli->outbuf,smb_vwv0,0xFF);
 994         SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */
 995
 996         cli_send_smb(cli);
 997         if (!cli_receive_smb(cli))
 998                 return False;
 999
1000         if (cli_is_error(cli)) {
1001                 return False;
1002         }
1003
1004         cli->cnum = -1;
1005         return True;
1006 }
1007
1008 /****************************************************************************
1009  Send a tconX.
1010 ****************************************************************************/
1011
1012 BOOL cli_send_tconX(struct cli_state *cli,
1013                     const char *share, const char *dev, const char *pass, int passlen)
1014 {
1015         fstring fullshare, pword;
1016         char *p;
1017         memset(cli->outbuf,'\0',smb_size);
1018         memset(cli->inbuf,'\0',smb_size);
1019
1020         fstrcpy(cli->share, share);
1021
1022         /* in user level security don't send a password now */
1023         if (cli->sec_mode & NEGOTIATE_SECURITY_USER_LEVEL) {
1024                 passlen = 1;
1025                 pass = "";
1026         } else if (!pass) {
1027                 DEBUG(1, ("Server not using user level security and no password supplied.\n"));
1028                 return False;
1029         }
1030
1031         if ((cli->sec_mode & NEGOTIATE_SECURITY_CHALLENGE_RESPONSE) &&
1032             *pass && passlen != 24) {
1033                 if (!lp_client_lanman_auth()) {
1034                         DEBUG(1, ("Server requested LANMAN password (share-level security) but 'client use lanman auth'"
1035                                   " is disabled\n"));
1036                         return False;
1037                 }
1038
1039                 /*
1040                  * Non-encrypted passwords - convert to DOS codepage before encryption.
1041                  */
1042                 passlen = 24;
1043                 SMBencrypt(pass,cli->secblob.data,(uchar *)pword);
1044         } else {
1045                 if((cli->sec_mode & (NEGOTIATE_SECURITY_USER_LEVEL|NEGOTIATE_SECURITY_CHALLENGE_RESPONSE)) == 0) {
1046                         if (!lp_client_plaintext_auth() && (*pass)) {
1047                                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1048                                           " is disabled\n"));
1049                                 return False;
1050                         }
1051
1052                         /*
1053                          * Non-encrypted passwords - convert to DOS codepage before using.
1054                          */
1055                         passlen = clistr_push(cli, pword, pass, sizeof(pword), STR_TERMINATE);
1056
1057                 } else {
1058                         if (passlen) {
1059                                 memcpy(pword, pass, passlen);
1060                         }
1061                 }
1062         }
1063
1064         slprintf(fullshare, sizeof(fullshare)-1,
1065                  "\\\\%s\\%s", cli->desthost, share);
1066
1067         set_message(NULL,cli->outbuf,4, 0, True);
1068         SCVAL(cli->outbuf,smb_com,SMBtconX);
1069         cli_setup_packet(cli);
1070
1071         SSVAL(cli->outbuf,smb_vwv0,0xFF);
1072         SSVAL(cli->outbuf,smb_vwv2,TCONX_FLAG_EXTENDED_RESPONSE);
1073         SSVAL(cli->outbuf,smb_vwv3,passlen);
1074
1075         p = smb_buf(cli->outbuf);
1076         if (passlen) {
1077                 memcpy(p,pword,passlen);
1078         }
1079         p += passlen;
1080         p += clistr_push(cli, p, fullshare, -1, STR_TERMINATE |STR_UPPER);
1081         p += clistr_push(cli, p, dev, -1, STR_TERMINATE |STR_UPPER | STR_ASCII);
1082
1083         cli_setup_bcc(cli, p);
1084
1085         cli_send_smb(cli);
1086         if (!cli_receive_smb(cli))
1087                 return False;
1088
1089         if (cli_is_error(cli))
1090                 return False;
1091
1092         clistr_pull(cli, cli->dev, smb_buf(cli->inbuf), sizeof(fstring), -1, STR_TERMINATE|STR_ASCII);
1093
1094         if (cli->protocol >= PROTOCOL_NT1 &&
1095             smb_buflen(cli->inbuf) == 3) {
1096                 /* almost certainly win95 - enable bug fixes */
1097                 cli->win95 = True;
1098         }
1099
1100         /* Make sure that we have the optional support 16-bit field.  WCT > 2 */
1101         /* Avoids issues when connecting to Win9x boxes sharing files */
1102
1103         cli->dfsroot = False;
1104         if ( (CVAL(cli->inbuf, smb_wct))>2 && cli->protocol >= PROTOCOL_LANMAN2 )
1105                 cli->dfsroot = (SVAL( cli->inbuf, smb_vwv2 ) & SMB_SHARE_IN_DFS) ? True : False;
1106
1107         cli->cnum = SVAL(cli->inbuf,smb_tid);
1108         return True;
1109 }
1110
1111 /****************************************************************************
1112  Send a tree disconnect.
1113 ****************************************************************************/
1114
1115 BOOL cli_tdis(struct cli_state *cli)
1116 {
1117         memset(cli->outbuf,'\0',smb_size);
1118         set_message(NULL,cli->outbuf,0,0,True);
1119         SCVAL(cli->outbuf,smb_com,SMBtdis);
1120         SSVAL(cli->outbuf,smb_tid,cli->cnum);
1121         cli_setup_packet(cli);
1122
1123         cli_send_smb(cli);
1124         if (!cli_receive_smb(cli))
1125                 return False;
1126
1127         if (cli_is_error(cli)) {
1128                 return False;
1129         }
1130
1131         cli->cnum = -1;
1132         return True;
1133 }
1134
1135 /****************************************************************************
1136  Send a negprot command.
1137 ****************************************************************************/
1138
1139 void cli_negprot_send(struct cli_state *cli)
1140 {
1141         char *p;
1142         int numprots;
1143
1144         if (cli->protocol < PROTOCOL_NT1)
1145                 cli->use_spnego = False;
1146
1147         memset(cli->outbuf,'\0',smb_size);
1148
1149         /* setup the protocol strings */
1150         set_message(NULL,cli->outbuf,0,0,True);
1151
1152         p = smb_buf(cli->outbuf);
1153         for (numprots=0;
1154              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1155              numprots++) {
1156                 *p++ = 2;
1157                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1158         }
1159
1160         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1161         cli_setup_bcc(cli, p);
1162         cli_setup_packet(cli);
1163
1164         SCVAL(smb_buf(cli->outbuf),0,2);
1165
1166         cli_send_smb(cli);
1167 }
1168
1169 /****************************************************************************
1170  Send a negprot command.
1171 ****************************************************************************/
1172
1173 BOOL cli_negprot(struct cli_state *cli)
1174 {
1175         char *p;
1176         int numprots;
1177         int plength;
1178
1179         if (cli->protocol < PROTOCOL_NT1)
1180                 cli->use_spnego = False;
1181
1182         memset(cli->outbuf,'\0',smb_size);
1183
1184         /* setup the protocol strings */
1185         for (plength=0,numprots=0;
1186              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1187              numprots++)
1188                 plength += strlen(prots[numprots].name)+2;
1189
1190         set_message(NULL,cli->outbuf,0,plength,True);
1191
1192         p = smb_buf(cli->outbuf);
1193         for (numprots=0;
1194              prots[numprots].name && prots[numprots].prot<=cli->protocol;
1195              numprots++) {
1196                 *p++ = 2;
1197                 p += clistr_push(cli, p, prots[numprots].name, -1, STR_TERMINATE);
1198         }
1199
1200         SCVAL(cli->outbuf,smb_com,SMBnegprot);
1201         cli_setup_packet(cli);
1202
1203         SCVAL(smb_buf(cli->outbuf),0,2);
1204
1205         cli_send_smb(cli);
1206         if (!cli_receive_smb(cli))
1207                 return False;
1208
1209         show_msg(cli->inbuf);
1210
1211         if (cli_is_error(cli) ||
1212             ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
1213                 return(False);
1214         }
1215
1216         cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;
1217
1218         if ((cli->protocol < PROTOCOL_NT1) && cli->sign_info.mandatory_signing) {
1219                 DEBUG(0,("cli_negprot: SMB signing is mandatory and the selected protocol level doesn't support it.\n"));
1220                 return False;
1221         }
1222
1223         if (cli->protocol >= PROTOCOL_NT1) {
1224                 struct timespec ts;
1225                 /* NT protocol */
1226                 cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
1227                 cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
1228                 cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
1229                 cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
1230                 cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
1231                 cli->serverzone *= 60;
1232                 /* this time arrives in real GMT */
1233                 ts = interpret_long_date(cli->inbuf+smb_vwv11+1);
1234                 cli->servertime = ts.tv_sec;
1235                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1236                 cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
1237                 if (cli->capabilities & CAP_RAW_MODE) {
1238                         cli->readbraw_supported = True;
1239                         cli->writebraw_supported = True;
1240                 }
1241                 /* work out if they sent us a workgroup */
1242                 if (!(cli->capabilities & CAP_EXTENDED_SECURITY) &&
1243                     smb_buflen(cli->inbuf) > 8) {
1244                         clistr_pull(cli, cli->server_domain,
1245                                     smb_buf(cli->inbuf)+8, sizeof(cli->server_domain),
1246                                     smb_buflen(cli->inbuf)-8, STR_UNICODE|STR_NOALIGN);
1247                 }
1248
1249                 /*
1250                  * As signing is slow we only turn it on if either the client or
1251                  * the server require it. JRA.
1252                  */
1253
1254                 if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
1255                         /* Fail if server says signing is mandatory and we don't want to support it. */
1256                         if (!cli->sign_info.allow_smb_signing) {
1257                                 DEBUG(0,("cli_negprot: SMB signing is mandatory and we have disabled it.\n"));
1258                                 return False;
1259                         }
1260                         cli->sign_info.negotiated_smb_signing = True;
1261                         cli->sign_info.mandatory_signing = True;
1262                 } else if (cli->sign_info.mandatory_signing && cli->sign_info.allow_smb_signing) {
1263                         /* Fail if client says signing is mandatory and the server doesn't support it. */
1264                         if (!(cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED)) {
1265                                 DEBUG(1,("cli_negprot: SMB signing is mandatory and the server doesn't support it.\n"));
1266                                 return False;
1267                         }
1268                         cli->sign_info.negotiated_smb_signing = True;
1269                         cli->sign_info.mandatory_signing = True;
1270                 } else if (cli->sec_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
1271                         cli->sign_info.negotiated_smb_signing = True;
1272                 }
1273
1274                 if (cli->capabilities & (CAP_LARGE_READX|CAP_LARGE_WRITEX)) {
1275                         SAFE_FREE(cli->outbuf);
1276                         SAFE_FREE(cli->inbuf);
1277                         cli->outbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1278                         cli->inbuf = (char *)SMB_MALLOC(CLI_SAMBA_MAX_LARGE_READX_SIZE+SAFETY_MARGIN);
1279                         cli->bufsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
1280                 }
1281
1282         } else if (cli->protocol >= PROTOCOL_LANMAN1) {
1283                 cli->use_spnego = False;
1284                 cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
1285                 cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
1286                 cli->max_mux = SVAL(cli->inbuf, smb_vwv3);
1287                 cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
1288                 cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
1289                 cli->serverzone *= 60;
1290                 /* this time is converted to GMT by make_unix_date */
1291                 cli->servertime = cli_make_unix_date(cli,cli->inbuf+smb_vwv8);
1292                 cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
1293                 cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
1294                 cli->secblob = data_blob(smb_buf(cli->inbuf),smb_buflen(cli->inbuf));
1295         } else {
1296                 /* the old core protocol */
1297                 cli->use_spnego = False;
1298                 cli->sec_mode = 0;
1299                 cli->serverzone = get_time_zone(time(NULL));
1300         }
1301
1302         cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);
1303
1304         /* a way to force ascii SMB */
1305         if (getenv("CLI_FORCE_ASCII"))
1306                 cli->capabilities &= ~CAP_UNICODE;
1307
1308         return True;
1309 }
1310
1311 /****************************************************************************
1312  Send a session request. See rfc1002.txt 4.3 and 4.3.2.
1313 ****************************************************************************/
1314
1315 BOOL cli_session_request(struct cli_state *cli,
1316                          struct nmb_name *calling, struct nmb_name *called)
1317 {
1318         char *p;
1319         int len = 4;
1320
1321         memcpy(&(cli->calling), calling, sizeof(*calling));
1322         memcpy(&(cli->called ), called , sizeof(*called ));
1323
1324         /* put in the destination name */
1325         p = cli->outbuf+len;
1326         name_mangle(cli->called .name, p, cli->called .name_type);
1327         len += name_len(p);
1328
1329         /* and my name */
1330         p = cli->outbuf+len;
1331         name_mangle(cli->calling.name, p, cli->calling.name_type);
1332         len += name_len(p);
1333
1334         /* 445 doesn't have session request */
1335         if (cli->port == 445)
1336                 return True;
1337
1338         /* send a session request (RFC 1002) */
1339         /* setup the packet length
1340          * Remove four bytes from the length count, since the length
1341          * field in the NBT Session Service header counts the number
1342          * of bytes which follow.  The cli_send_smb() function knows
1343          * about this and accounts for those four bytes.
1344          * CRH.
1345          */
1346         len -= 4;
1347         _smb_setlen(cli->outbuf,len);
1348         SCVAL(cli->outbuf,0,0x81);
1349
1350         cli_send_smb(cli);
1351         DEBUG(5,("Sent session request\n"));
1352
1353         if (!cli_receive_smb(cli))
1354                 return False;
1355
1356         if (CVAL(cli->inbuf,0) == 0x84) {
1357                 /* C. Hoch  9/14/95 Start */
1358                 /* For information, here is the response structure.
1359                  * We do the byte-twiddling to for portability.
1360                 struct RetargetResponse{
1361                 unsigned char type;
1362                 unsigned char flags;
1363                 int16 length;
1364                 int32 ip_addr;
1365                 int16 port;
1366                 };
1367                 */
1368                 int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
1369                 /* SESSION RETARGET */
1370                 putip((char *)&cli->dest_ip,cli->inbuf+4);
1371
1372                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
1373                 if (cli->fd == -1)
1374                         return False;
1375
1376                 DEBUG(3,("Retargeted\n"));
1377
1378                 set_socket_options(cli->fd,user_socket_options);
1379
1380                 /* Try again */
1381                 {
1382                         static int depth;
1383                         BOOL ret;
1384                         if (depth > 4) {
1385                                 DEBUG(0,("Retarget recursion - failing\n"));
1386                                 return False;
1387                         }
1388                         depth++;
1389                         ret = cli_session_request(cli, calling, called);
1390                         depth--;
1391                         return ret;
1392                 }
1393         } /* C. Hoch 9/14/95 End */
1394
1395         if (CVAL(cli->inbuf,0) != 0x82) {
1396                 /* This is the wrong place to put the error... JRA. */
1397                 cli->rap_error = CVAL(cli->inbuf,4);
1398                 return False;
1399         }
1400         return(True);
1401 }
1402
1403 /****************************************************************************
1404  Open the client sockets.
1405 ****************************************************************************/
1406
1407 NTSTATUS cli_connect(struct cli_state *cli, const char *host, struct in_addr *ip)
1408 {
1409         int name_type = 0x20;
1410         char *p;
1411
1412         /* reasonable default hostname */
1413         if (!host) host = "*SMBSERVER";
1414
1415         fstrcpy(cli->desthost, host);
1416
1417         /* allow hostnames of the form NAME#xx and do a netbios lookup */
1418         if ((p = strchr(cli->desthost, '#'))) {
1419                 name_type = strtol(p+1, NULL, 16);
1420                 *p = 0;
1421         }
1422
1423         if (!ip || is_zero_ip(*ip)) {
1424                 if (!resolve_name(cli->desthost, &cli->dest_ip, name_type)) {
1425                         return NT_STATUS_BAD_NETWORK_NAME;
1426                 }
1427                 if (ip) *ip = cli->dest_ip;
1428         } else {
1429                 cli->dest_ip = *ip;
1430         }
1431
1432         if (getenv("LIBSMB_PROG")) {
1433                 cli->fd = sock_exec(getenv("LIBSMB_PROG"));
1434         } else {
1435                 /* try 445 first, then 139 */
1436                 int port = cli->port?cli->port:445;
1437                 cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1438                                           port, cli->timeout);
1439                 if (cli->fd == -1 && cli->port == 0) {
1440                         port = 139;
1441                         cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip,
1442                                                   port, cli->timeout);
1443                 }
1444                 if (cli->fd != -1)
1445                         cli->port = port;
1446         }
1447         if (cli->fd == -1) {
1448                 DEBUG(1,("Error connecting to %s (%s)\n",
1449                          ip?inet_ntoa(*ip):host,strerror(errno)));
1450                 return map_nt_error_from_unix(errno);
1451         }
1452
1453         set_socket_options(cli->fd,user_socket_options);
1454
1455         return NT_STATUS_OK;
1456 }
1457
1458 /**
1459    establishes a connection to after the negprot.
1460    @param output_cli A fully initialised cli structure, non-null only on success
1461    @param dest_host The netbios name of the remote host
1462    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1463    @param port (optional) The destination port (0 for default)
1464    @param retry BOOL. Did this connection fail with a retryable error ?
1465
1466 */
1467 NTSTATUS cli_start_connection(struct cli_state **output_cli,
1468                               const char *my_name,
1469                               const char *dest_host,
1470                               struct in_addr *dest_ip, int port,
1471                               int signing_state, int flags,
1472                               BOOL *retry)
1473 {
1474         NTSTATUS nt_status;
1475         struct nmb_name calling;
1476         struct nmb_name called;
1477         struct cli_state *cli;
1478         struct in_addr ip;
1479
1480         if (retry)
1481                 *retry = False;
1482
1483         if (!my_name)
1484                 my_name = global_myname();
1485
1486         if (!(cli = cli_initialise())) {
1487                 return NT_STATUS_NO_MEMORY;
1488         }
1489
1490         make_nmb_name(&calling, my_name, 0x0);
1491         make_nmb_name(&called , dest_host, 0x20);
1492
1493         if (cli_set_port(cli, port) != port) {
1494                 cli_shutdown(cli);
1495                 return NT_STATUS_UNSUCCESSFUL;
1496         }
1497
1498         cli_set_timeout(cli, 10000); /* 10 seconds. */
1499
1500         if (dest_ip)
1501                 ip = *dest_ip;
1502         else
1503                 ZERO_STRUCT(ip);
1504
1505 again:
1506
1507         DEBUG(3,("Connecting to host=%s\n", dest_host));
1508
1509         nt_status = cli_connect(cli, dest_host, &ip);
1510         if (!NT_STATUS_IS_OK(nt_status)) {
1511                 DEBUG(1,("cli_start_connection: failed to connect to %s (%s). Error %s\n",
1512                          nmb_namestr(&called), inet_ntoa(ip), nt_errstr(nt_status) ));
1513                 cli_shutdown(cli);
1514                 return nt_status;
1515         }
1516
1517         if (retry)
1518                 *retry = True;
1519
1520         if (!cli_session_request(cli, &calling, &called)) {
1521                 char *p;
1522                 DEBUG(1,("session request to %s failed (%s)\n",
1523                          called.name, cli_errstr(cli)));
1524                 if ((p=strchr(called.name, '.')) && !is_ipaddress(called.name)) {
1525                         *p = 0;
1526                         goto again;
1527                 }
1528                 if (strcmp(called.name, "*SMBSERVER")) {
1529                         make_nmb_name(&called , "*SMBSERVER", 0x20);
1530                         goto again;
1531                 }
1532                 return NT_STATUS_BAD_NETWORK_NAME;
1533         }
1534
1535         cli_setup_signing_state(cli, signing_state);
1536
1537         if (flags & CLI_FULL_CONNECTION_DONT_SPNEGO)
1538                 cli->use_spnego = False;
1539         else if (flags & CLI_FULL_CONNECTION_USE_KERBEROS)
1540                 cli->use_kerberos = True;
1541
1542         if (!cli_negprot(cli)) {
1543                 DEBUG(1,("failed negprot\n"));
1544                 nt_status = cli_nt_error(cli);
1545                 if (NT_STATUS_IS_OK(nt_status)) {
1546                         nt_status = NT_STATUS_UNSUCCESSFUL;
1547                 }
1548                 cli_shutdown(cli);
1549                 return nt_status;
1550         }
1551
1552         *output_cli = cli;
1553         return NT_STATUS_OK;
1554 }
1555
1556
1557 /**
1558    establishes a connection right up to doing tconX, password specified.
1559    @param output_cli A fully initialised cli structure, non-null only on success
1560    @param dest_host The netbios name of the remote host
1561    @param dest_ip (optional) The the destination IP, NULL for name based lookup
1562    @param port (optional) The destination port (0 for default)
1563    @param service (optional) The share to make the connection to.  Should be 'unqualified' in any way.
1564    @param service_type The 'type' of serivice.
1565    @param user Username, unix string
1566    @param domain User's domain
1567    @param password User's password, unencrypted unix string.
1568    @param retry BOOL. Did this connection fail with a retryable error ?
1569 */
1570
1571 NTSTATUS cli_full_connection(struct cli_state **output_cli,
1572                              const char *my_name,
1573                              const char *dest_host,
1574                              struct in_addr *dest_ip, int port,
1575                              const char *service, const char *service_type,
1576                              const char *user, const char *domain,
1577                              const char *password, int flags,
1578                              int signing_state,
1579                              BOOL *retry)
1580 {
1581         NTSTATUS nt_status;
1582         struct cli_state *cli = NULL;
1583         int pw_len = password ? strlen(password)+1 : 0;
1584
1585         *output_cli = NULL;
1586
1587         if (password == NULL) {
1588                 password = "";
1589         }
1590
1591         nt_status = cli_start_connection(&cli, my_name, dest_host,
1592                                          dest_ip, port, signing_state, flags, retry);
1593
1594         if (!NT_STATUS_IS_OK(nt_status)) {
1595                 return nt_status;
1596         }
1597
1598         nt_status = cli_session_setup(cli, user, password, pw_len, password,
1599                                       pw_len, domain);
1600         if (!NT_STATUS_IS_OK(nt_status)) {
1601
1602                 if (!(flags & CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK)) {
1603                         DEBUG(1,("failed session setup with %s\n",
1604                                  nt_errstr(nt_status)));
1605                         cli_shutdown(cli);
1606                         return nt_status;
1607                 }
1608
1609                 nt_status = cli_session_setup(cli, "", "", 0, "", 0, domain);
1610                 if (!NT_STATUS_IS_OK(nt_status)) {
1611                         DEBUG(1,("anonymous failed session setup with %s\n",
1612                                  nt_errstr(nt_status)));
1613                         cli_shutdown(cli);
1614                         return nt_status;
1615                 }
1616         }
1617
1618         if (service) {
1619                 if (!cli_send_tconX(cli, service, service_type, password, pw_len)) {
1620                         nt_status = cli_nt_error(cli);
1621                         DEBUG(1,("failed tcon_X with %s\n", nt_errstr(nt_status)));
1622                         cli_shutdown(cli);
1623                         if (NT_STATUS_IS_OK(nt_status)) {
1624                                 nt_status = NT_STATUS_UNSUCCESSFUL;
1625                         }
1626                         return nt_status;
1627                 }
1628         }
1629
1630         cli_init_creds(cli, user, domain, password);
1631
1632         *output_cli = cli;
1633         return NT_STATUS_OK;
1634 }
1635
1636 /****************************************************************************
1637  Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
1638 ****************************************************************************/
1639
1640 BOOL attempt_netbios_session_request(struct cli_state **ppcli, const char *srchost, const char *desthost,
1641                                      struct in_addr *pdest_ip)
1642 {
1643         struct nmb_name calling, called;
1644
1645         make_nmb_name(&calling, srchost, 0x0);
1646
1647         /*
1648          * If the called name is an IP address
1649          * then use *SMBSERVER immediately.
1650          */
1651
1652         if(is_ipaddress(desthost)) {
1653                 make_nmb_name(&called, "*SMBSERVER", 0x20);
1654         } else {
1655                 make_nmb_name(&called, desthost, 0x20);
1656         }
1657
1658         if (!cli_session_request(*ppcli, &calling, &called)) {
1659                 NTSTATUS status;
1660                 struct nmb_name smbservername;
1661
1662                 make_nmb_name(&smbservername , "*SMBSERVER", 0x20);
1663
1664                 /*
1665                  * If the name wasn't *SMBSERVER then
1666                  * try with *SMBSERVER if the first name fails.
1667                  */
1668
1669                 if (nmb_name_equal(&called, &smbservername)) {
1670
1671                         /*
1672                          * The name used was *SMBSERVER, don't bother with another name.
1673                          */
1674
1675                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
1676 with error %s.\n", desthost, cli_errstr(*ppcli) ));
1677                         return False;
1678                 }
1679
1680                 /* Try again... */
1681                 cli_shutdown(*ppcli);
1682
1683                 *ppcli = cli_initialise();
1684                 if (!*ppcli) {
1685                         /* Out of memory... */
1686                         return False;
1687                 }
1688
1689                 status = cli_connect(*ppcli, desthost, pdest_ip);
1690                 if (!NT_STATUS_IS_OK(status) ||
1691                                 !cli_session_request(*ppcli, &calling, &smbservername)) {
1692                         DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
1693 name *SMBSERVER with error %s\n", desthost, cli_errstr(*ppcli) ));
1694                         return False;
1695                 }
1696         }
1697
1698         return True;
1699 }
1700
1701
1702
1703
1704
1705 /****************************************************************************
1706  Send an old style tcon.
1707 ****************************************************************************/
1708 NTSTATUS cli_raw_tcon(struct cli_state *cli,
1709                       const char *service, const char *pass, const char *dev,
1710                       uint16 *max_xmit, uint16 *tid)
1711 {
1712         char *p;
1713
1714         if (!lp_client_plaintext_auth() && (*pass)) {
1715                 DEBUG(1, ("Server requested plaintext password but 'client use plaintext auth'"
1716                           " is disabled\n"));
1717                 return NT_STATUS_ACCESS_DENIED;
1718         }
1719
1720         memset(cli->outbuf,'\0',smb_size);
1721         memset(cli->inbuf,'\0',smb_size);
1722
1723         set_message(NULL,cli->outbuf, 0, 0, True);
1724         SCVAL(cli->outbuf,smb_com,SMBtcon);
1725         cli_setup_packet(cli);
1726
1727         p = smb_buf(cli->outbuf);
1728         *p++ = 4; p += clistr_push(cli, p, service, -1, STR_TERMINATE | STR_NOALIGN);
1729         *p++ = 4; p += clistr_push(cli, p, pass, -1, STR_TERMINATE | STR_NOALIGN);
1730         *p++ = 4; p += clistr_push(cli, p, dev, -1, STR_TERMINATE | STR_NOALIGN);
1731
1732         cli_setup_bcc(cli, p);
1733
1734         cli_send_smb(cli);
1735         if (!cli_receive_smb(cli)) {
1736                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1737         }
1738
1739         if (cli_is_error(cli)) {
1740                 return cli_nt_error(cli);
1741         }
1742
1743         *max_xmit = SVAL(cli->inbuf, smb_vwv0);
1744         *tid = SVAL(cli->inbuf, smb_vwv1);
1745
1746         return NT_STATUS_OK;
1747 }
1748
1749 /* Return a cli_state pointing at the IPC$ share for the given server */
1750
1751 struct cli_state *get_ipc_connect(char *server, struct in_addr *server_ip,
1752                                          struct user_auth_info *user_info)
1753 {
1754         struct cli_state *cli;
1755         pstring myname;
1756         NTSTATUS nt_status;
1757
1758         get_myname(myname);
1759
1760         nt_status = cli_full_connection(&cli, myname, server, server_ip, 0, "IPC$", "IPC",
1761                                         user_info->username, lp_workgroup(), user_info->password,
1762                                         CLI_FULL_CONNECTION_ANONYMOUS_FALLBACK, Undefined, NULL);
1763
1764         if (NT_STATUS_IS_OK(nt_status)) {
1765                 return cli;
1766         } else if (is_ipaddress(server)) {
1767             /* windows 9* needs a correct NMB name for connections */
1768             fstring remote_name;
1769
1770             if (name_status_find("*", 0, 0, *server_ip, remote_name)) {
1771                 cli = get_ipc_connect(remote_name, server_ip, user_info);
1772                 if (cli)
1773                     return cli;
1774             }
1775         }
1776         return NULL;
1777 }
1778
1779 /*
1780  * Given the IP address of a master browser on the network, return its
1781  * workgroup and connect to it.
1782  *
1783  * This function is provided to allow additional processing beyond what
1784  * get_ipc_connect_master_ip_bcast() does, e.g. to retrieve the list of master
1785  * browsers and obtain each master browsers' list of domains (in case the
1786  * first master browser is recently on the network and has not yet
1787  * synchronized with other master browsers and therefore does not yet have the
1788  * entire network browse list)
1789  */
1790
1791 struct cli_state *get_ipc_connect_master_ip(struct ip_service * mb_ip, pstring workgroup, struct user_auth_info *user_info)
1792 {
1793         static fstring name;
1794         struct cli_state *cli;
1795         struct in_addr server_ip;
1796
1797         DEBUG(99, ("Looking up name of master browser %s\n",
1798                    inet_ntoa(mb_ip->ip)));
1799
1800         /*
1801          * Do a name status query to find out the name of the master browser.
1802          * We use <01><02>__MSBROWSE__<02>#01 if *#00 fails because a domain
1803          * master browser will not respond to a wildcard query (or, at least,
1804          * an NT4 server acting as the domain master browser will not).
1805          *
1806          * We might be able to use ONLY the query on MSBROWSE, but that's not
1807          * yet been tested with all Windows versions, so until it is, leave
1808          * the original wildcard query as the first choice and fall back to
1809          * MSBROWSE if the wildcard query fails.
1810          */
1811         if (!name_status_find("*", 0, 0x1d, mb_ip->ip, name) &&
1812             !name_status_find(MSBROWSE, 1, 0x1d, mb_ip->ip, name)) {
1813
1814                 DEBUG(99, ("Could not retrieve name status for %s\n",
1815                            inet_ntoa(mb_ip->ip)));
1816                 return NULL;
1817         }
1818
1819         if (!find_master_ip(name, &server_ip)) {
1820                 DEBUG(99, ("Could not find master ip for %s\n", name));
1821                 return NULL;
1822         }
1823
1824                 pstrcpy(workgroup, name);
1825
1826                 DEBUG(4, ("found master browser %s, %s\n",
1827                   name, inet_ntoa(mb_ip->ip)));
1828
1829                 cli = get_ipc_connect(inet_ntoa(server_ip), &server_ip, user_info);
1830
1831                 return cli;
1832
1833 }
1834
1835 /*
1836  * Return the IP address and workgroup of a master browser on the network, and
1837  * connect to it.
1838  */
1839
1840 struct cli_state *get_ipc_connect_master_ip_bcast(pstring workgroup, struct user_auth_info *user_info)
1841 {
1842         struct ip_service *ip_list;
1843         struct cli_state *cli;
1844         int i, count;
1845
1846         DEBUG(99, ("Do broadcast lookup for workgroups on local network\n"));
1847
1848         /* Go looking for workgroups by broadcasting on the local network */
1849
1850         if (!NT_STATUS_IS_OK(name_resolve_bcast(MSBROWSE, 1, &ip_list,
1851                                                 &count))) {
1852                 DEBUG(99, ("No master browsers responded\n"));
1853                 return False;
1854         }
1855
1856         for (i = 0; i < count; i++) {
1857             DEBUG(99, ("Found master browser %s\n", inet_ntoa(ip_list[i].ip)));
1858
1859             cli = get_ipc_connect_master_ip(&ip_list[i], workgroup, user_info);
1860             if (cli)
1861                     return(cli);
1862         }
1863
1864         return NULL;
1865 }