2 Unix SMB/CIFS implementation.
3 client connect/disconnect routines
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Gerald (Jerry) Carter 2004
6 Copyright (C) Jeremy Allison 2007-2009
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 /********************************************************************
27 DFS paths are *always* of the form \server\share\<pathname> (the \ characters
28 are not C escaped here).
30 - but if we're using POSIX paths then <pathname> may contain
31 '/' separators, not '\\' separators. So cope with '\\' or '/'
32 as a separator when looking at the pathname part.... JRA.
33 ********************************************************************/
35 /********************************************************************
36 Ensure a connection is encrypted.
37 ********************************************************************/
39 NTSTATUS cli_cm_force_encryption(struct cli_state *c,
43 const char *sharename)
45 NTSTATUS status = cli_force_encryption(c,
50 if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_SUPPORTED)) {
51 d_printf("Encryption required and "
52 "server that doesn't support "
53 "UNIX extensions - failing connect\n");
54 } else if (NT_STATUS_EQUAL(status,NT_STATUS_UNKNOWN_REVISION)) {
55 d_printf("Encryption required and "
56 "can't get UNIX CIFS extensions "
57 "version from server.\n");
58 } else if (NT_STATUS_EQUAL(status,NT_STATUS_UNSUPPORTED_COMPRESSION)) {
59 d_printf("Encryption required and "
60 "share %s doesn't support "
61 "encryption.\n", sharename);
62 } else if (!NT_STATUS_IS_OK(status)) {
63 d_printf("Encryption required and "
64 "setup failed with error %s.\n",
71 /********************************************************************
72 Return a connection to a server.
73 ********************************************************************/
75 static struct cli_state *do_connect(TALLOC_CTX *ctx,
78 const struct user_auth_info *auth_info,
85 struct cli_state *c = NULL;
86 struct nmb_name called, calling;
87 const char *called_str;
89 struct sockaddr_storage ss;
92 char *newserver, *newshare;
97 /* make a copy so we don't modify the global string 'service' */
98 servicename = talloc_strdup(ctx,share);
102 sharename = servicename;
103 if (*sharename == '\\') {
105 called_str = sharename;
106 if (server == NULL) {
109 sharename = strchr_m(sharename,'\\');
123 make_nmb_name(&calling, global_myname(), 0x0);
124 make_nmb_name(&called , called_str, name_type);
129 /* have to open a new connection */
130 c = cli_initialise_ex(get_cmdline_auth_info_signing_state(auth_info));
132 d_printf("Connection to %s failed\n", server_n);
136 cli_set_port(c, port);
139 status = cli_connect(c, server_n, &ss);
140 if (!NT_STATUS_IS_OK(status)) {
141 d_printf("Connection to %s failed (Error %s)\n",
148 if (max_protocol == 0) {
149 max_protocol = PROTOCOL_NT1;
151 c->protocol = max_protocol;
152 c->use_kerberos = get_cmdline_auth_info_use_kerberos(auth_info);
153 c->fallback_after_kerberos =
154 get_cmdline_auth_info_fallback_after_kerberos(auth_info);
155 c->use_ccache = get_cmdline_auth_info_use_ccache(auth_info);
157 if (!cli_session_request(c, &calling, &called)) {
159 d_printf("session request to %s failed (%s)\n",
160 called.name, cli_errstr(c));
163 if ((p=strchr_m(called.name, '.'))) {
167 if (strcmp(called.name, "*SMBSERVER")) {
168 make_nmb_name(&called , "*SMBSERVER", 0x20);
174 DEBUG(4,(" session request ok\n"));
176 status = cli_negprot(c);
178 if (!NT_STATUS_IS_OK(status)) {
179 d_printf("protocol negotiation failed: %s\n",
185 username = get_cmdline_auth_info_username(auth_info);
186 password = get_cmdline_auth_info_password(auth_info);
188 if (!NT_STATUS_IS_OK(cli_session_setup(c, username,
189 password, strlen(password),
190 password, strlen(password),
192 /* If a password was not supplied then
193 * try again with a null username. */
194 if (password[0] || !username[0] ||
195 get_cmdline_auth_info_use_kerberos(auth_info) ||
196 !NT_STATUS_IS_OK(cli_session_setup(c, "",
200 d_printf("session setup failed: %s\n", cli_errstr(c));
201 if (NT_STATUS_V(cli_nt_error(c)) ==
202 NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
203 d_printf("did you forget to run kinit?\n");
207 d_printf("Anonymous login successful\n");
208 status = cli_init_creds(c, "", lp_workgroup(), "");
210 status = cli_init_creds(c, username, lp_workgroup(), password);
213 if (!NT_STATUS_IS_OK(status)) {
214 DEBUG(10,("cli_init_creds() failed: %s\n", nt_errstr(status)));
219 if ( show_sessetup ) {
220 if (*c->server_domain) {
221 DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
222 c->server_domain,c->server_os,c->server_type));
223 } else if (*c->server_os || *c->server_type) {
224 DEBUG(0,("OS=[%s] Server=[%s]\n",
225 c->server_os,c->server_type));
228 DEBUG(4,(" session setup ok\n"));
230 /* here's the fun part....to support 'msdfs proxy' shares
231 (on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
232 here before trying to connect to the original share.
233 cli_check_msdfs_proxy() will fail if it is a normal share. */
235 if ((c->capabilities & CAP_DFS) &&
236 cli_check_msdfs_proxy(ctx, c, sharename,
237 &newserver, &newshare,
243 return do_connect(ctx, newserver,
244 newshare, auth_info, false,
245 force_encrypt, max_protocol,
249 /* must be a normal share */
251 status = cli_tcon_andx(c, sharename, "?????",
252 password, strlen(password)+1);
253 if (!NT_STATUS_IS_OK(status)) {
254 d_printf("tree connect failed: %s\n", nt_errstr(status));
260 status = cli_cm_force_encryption(c,
265 if (!NT_STATUS_IS_OK(status)) {
271 DEBUG(4,(" tconx ok\n"));
275 /****************************************************************************
276 ****************************************************************************/
278 static void cli_set_mntpoint(struct cli_state *cli, const char *mnt)
280 char *name = clean_name(NULL, mnt);
284 TALLOC_FREE(cli->dfs_mountpoint);
285 cli->dfs_mountpoint = talloc_strdup(cli, name);
289 /********************************************************************
290 Add a new connection to the list.
291 referring_cli == NULL means a new initial connection.
292 ********************************************************************/
294 static struct cli_state *cli_cm_connect(TALLOC_CTX *ctx,
295 struct cli_state *referring_cli,
298 const struct user_auth_info *auth_info,
305 struct cli_state *cli;
307 cli = do_connect(ctx, server, share,
309 show_hdr, force_encrypt, max_protocol,
316 /* Enter into the list. */
318 DLIST_ADD_END(referring_cli, cli, struct cli_state *);
321 if (referring_cli && referring_cli->requested_posix_capabilities) {
323 uint32 caplow, caphigh;
325 status = cli_unix_extensions_version(cli, &major, &minor,
327 if (NT_STATUS_IS_OK(status)) {
328 cli_set_unix_extensions_capabilities(cli,
337 /********************************************************************
338 Return a connection to a server on a particular share.
339 ********************************************************************/
341 static struct cli_state *cli_cm_find(struct cli_state *cli,
351 /* Search to the start of the list. */
352 for (p = cli; p; p = DLIST_PREV(p)) {
353 if (strequal(server, p->desthost) &&
354 strequal(share,p->share)) {
359 /* Search to the end of the list. */
360 for (p = cli->next; p; p = p->next) {
361 if (strequal(server, p->desthost) &&
362 strequal(share,p->share)) {
370 /****************************************************************************
371 Open a client connection to a \\server\share.
372 ****************************************************************************/
374 struct cli_state *cli_cm_open(TALLOC_CTX *ctx,
375 struct cli_state *referring_cli,
378 const struct user_auth_info *auth_info,
385 /* Try to reuse an existing connection in this list. */
386 struct cli_state *c = cli_cm_find(referring_cli, server, share);
392 if (auth_info == NULL) {
393 /* Can't do a new connection
394 * without auth info. */
395 d_printf("cli_cm_open() Unable to open connection [\\%s\\%s] "
396 "without auth info\n",
401 return cli_cm_connect(ctx,
413 /****************************************************************************
414 ****************************************************************************/
416 void cli_cm_display(const struct cli_state *cli)
420 for (i=0; cli; cli = cli->next,i++ ) {
421 d_printf("%d:\tserver=%s, share=%s\n",
422 i, cli->desthost, cli->share );
426 /****************************************************************************
427 ****************************************************************************/
429 /****************************************************************************
430 ****************************************************************************/
433 void cli_cm_set_credentials(struct user_auth_info *auth_info)
435 SAFE_FREE(cm_creds.username);
436 cm_creds.username = SMB_STRDUP(get_cmdline_auth_info_username(
439 if (get_cmdline_auth_info_got_pass(auth_info)) {
440 cm_set_password(get_cmdline_auth_info_password(auth_info));
443 cm_creds.use_kerberos = get_cmdline_auth_info_use_kerberos(auth_info);
444 cm_creds.fallback_after_kerberos = false;
445 cm_creds.signing_state = get_cmdline_auth_info_signing_state(auth_info);
449 /**********************************************************************
450 split a dfs path into the server, share name, and extrapath components
451 **********************************************************************/
453 static bool split_dfs_path(TALLOC_CTX *ctx,
454 const char *nodepath,
464 *pp_extrapath = NULL;
466 path = talloc_strdup(ctx, nodepath);
471 if ( path[0] != '\\' ) {
475 p = strchr_m( path + 1, '\\' );
483 /* Look for any extra/deep path */
484 q = strchr_m(p, '\\');
488 *pp_extrapath = talloc_strdup(ctx, q);
490 *pp_extrapath = talloc_strdup(ctx, "");
492 if (*pp_extrapath == NULL) {
496 *pp_share = talloc_strdup(ctx, p);
497 if (*pp_share == NULL) {
501 *pp_server = talloc_strdup(ctx, &path[1]);
502 if (*pp_server == NULL) {
510 TALLOC_FREE(*pp_share);
511 TALLOC_FREE(*pp_extrapath);
516 /****************************************************************************
517 Return the original path truncated at the directory component before
518 the first wildcard character. Trust the caller to provide a NULL
520 ****************************************************************************/
522 static char *clean_path(TALLOC_CTX *ctx, const char *path)
528 /* No absolute paths. */
529 while (IS_DIRECTORY_SEP(*path)) {
533 path_out = talloc_strdup(ctx, path);
538 p1 = strchr_m(path_out, '*');
539 p2 = strchr_m(path_out, '?');
551 /* Now go back to the start of this component. */
552 p1 = strrchr_m(path_out, '/');
553 p2 = strrchr_m(path_out, '\\');
560 /* Strip any trailing separator */
562 len = strlen(path_out);
563 if ( (len > 0) && IS_DIRECTORY_SEP(path_out[len-1])) {
564 path_out[len-1] = '\0';
570 /****************************************************************************
571 ****************************************************************************/
573 static char *cli_dfs_make_full_path(TALLOC_CTX *ctx,
574 struct cli_state *cli,
577 char path_sep = '\\';
579 /* Ensure the extrapath doesn't start with a separator. */
580 while (IS_DIRECTORY_SEP(*dir)) {
584 if (cli->requested_posix_capabilities & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
587 return talloc_asprintf(ctx, "%c%s%c%s%c%s",
596 /********************************************************************
597 check for dfs referral
598 ********************************************************************/
600 static bool cli_dfs_check_error(struct cli_state *cli, NTSTATUS expected,
603 /* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
605 if (!(cli->capabilities & CAP_UNICODE)) {
608 if (!(cli->capabilities & CAP_STATUS32)) {
611 if (NT_STATUS_EQUAL(status, expected)) {
617 /********************************************************************
618 Get the dfs referral link.
619 ********************************************************************/
621 bool cli_dfs_get_referral(TALLOC_CTX *ctx,
622 struct cli_state *cli,
624 struct client_dfs_referral **refs,
628 unsigned int data_len = 0;
629 unsigned int param_len = 0;
630 uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
632 char *rparam=NULL, *rdata=NULL;
635 size_t pathlen = 2*(strlen(path)+1);
636 smb_ucs2_t *path_ucs;
637 char *consumed_path = NULL;
638 uint16_t consumed_ucs;
639 uint16 num_referrals;
640 struct client_dfs_referral *referrals = NULL;
646 param = SMB_MALLOC_ARRAY(char, 2+pathlen+2);
650 SSVAL(param, 0, 0x03); /* max referral level */
653 path_ucs = (smb_ucs2_t *)p;
654 p += clistr_push(cli, p, path, pathlen, STR_TERMINATE);
655 param_len = PTR_DIFF(p, param);
657 if (!cli_send_trans(cli, SMBtrans2,
659 -1, 0, /* fid, flags */
660 &setup, 1, 0, /* setup, length, max */
661 param, param_len, 2, /* param, length, max */
662 NULL, 0, cli->max_xmit /* data, length, max */
667 if (!cli_receive_trans(cli, SMBtrans2,
669 &rdata, &data_len)) {
677 endp = rdata + data_len;
679 consumed_ucs = SVAL(rdata, 0);
680 num_referrals = SVAL(rdata, 2);
682 /* consumed_ucs is the number of bytes
683 * of the UCS2 path consumed not counting any
684 * terminating null. We need to convert
685 * back to unix charset and count again
686 * to get the number of bytes consumed from
687 * the incoming path. */
689 if (pull_string_talloc(talloc_tos(),
698 if (consumed_path == NULL) {
701 *consumed = strlen(consumed_path);
703 if (num_referrals != 0) {
709 referrals = talloc_array(ctx, struct client_dfs_referral,
715 /* start at the referrals array */
718 for (i=0; i<num_referrals && p < endp; i++) {
722 ref_version = SVAL(p, 0);
723 ref_size = SVAL(p, 2);
724 node_offset = SVAL(p, 16);
726 if (ref_version != 3) {
731 referrals[i].proximity = SVAL(p, 8);
732 referrals[i].ttl = SVAL(p, 10);
734 if (p + node_offset > endp) {
737 clistr_pull_talloc(ctx, cli->inbuf,
738 SVAL(cli->inbuf, smb_flg2),
739 &referrals[i].dfspath,
741 STR_TERMINATE|STR_UNICODE);
743 if (!referrals[i].dfspath) {
748 if (i < num_referrals) {
755 *num_refs = num_referrals;
760 TALLOC_FREE(consumed_path);
767 /********************************************************************
768 ********************************************************************/
770 bool cli_resolve_path(TALLOC_CTX *ctx,
772 const struct user_auth_info *dfs_auth_info,
773 struct cli_state *rootcli,
775 struct cli_state **targetcli,
776 char **pp_targetpath)
778 struct client_dfs_referral *refs = NULL;
781 struct cli_state *cli_ipc = NULL;
782 char *dfs_path = NULL;
783 char *cleanpath = NULL;
784 char *extrapath = NULL;
788 struct cli_state *newcli = NULL;
789 char *newpath = NULL;
790 char *newmount = NULL;
792 SMB_STRUCT_STAT sbuf;
796 if ( !rootcli || !path || !targetcli ) {
800 /* Don't do anything if this is not a DFS root. */
802 if ( !rootcli->dfsroot) {
803 *targetcli = rootcli;
804 *pp_targetpath = talloc_strdup(ctx, path);
805 if (!*pp_targetpath) {
813 /* Send a trans2_query_path_info to check for a referral. */
815 cleanpath = clean_path(ctx, path);
820 dfs_path = cli_dfs_make_full_path(ctx, rootcli, cleanpath);
825 status = cli_qpathinfo_basic( rootcli, dfs_path, &sbuf, &attributes);
826 if (NT_STATUS_IS_OK(status)) {
827 /* This is an ordinary path, just return it. */
828 *targetcli = rootcli;
829 *pp_targetpath = talloc_strdup(ctx, path);
830 if (!*pp_targetpath) {
836 /* Special case where client asked for a path that does not exist */
838 if (cli_dfs_check_error(rootcli, NT_STATUS_OBJECT_NAME_NOT_FOUND,
840 *targetcli = rootcli;
841 *pp_targetpath = talloc_strdup(ctx, path);
842 if (!*pp_targetpath) {
848 /* We got an error, check for DFS referral. */
850 if (!cli_dfs_check_error(rootcli, NT_STATUS_PATH_NOT_COVERED,
855 /* Check for the referral. */
857 if (!(cli_ipc = cli_cm_open(ctx,
863 (rootcli->trans_enc_state != NULL),
870 if (!cli_dfs_get_referral(ctx, cli_ipc, dfs_path, &refs,
871 &num_refs, &consumed) || !num_refs) {
875 /* Just store the first referral for now. */
877 if (!refs[0].dfspath) {
880 if (!split_dfs_path(ctx, refs[0].dfspath, &server, &share,
885 /* Make sure to recreate the original string including any wildcards. */
887 dfs_path = cli_dfs_make_full_path(ctx, rootcli, path);
891 pathlen = strlen(dfs_path);
892 consumed = MIN(pathlen, consumed);
893 *pp_targetpath = talloc_strdup(ctx, &dfs_path[consumed]);
894 if (!*pp_targetpath) {
897 dfs_path[consumed] = '\0';
900 * *pp_targetpath is now the unconsumed part of the path.
901 * dfs_path is now the consumed part of the path
902 * (in \server\share\path format).
905 /* Open the connection to the target server & share */
906 if ((*targetcli = cli_cm_open(ctx, rootcli,
911 (rootcli->trans_enc_state != NULL),
915 d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
920 if (extrapath && strlen(extrapath) > 0) {
921 *pp_targetpath = talloc_asprintf(ctx,
925 if (!*pp_targetpath) {
930 /* parse out the consumed mount path */
931 /* trim off the \server\share\ */
935 if (*ppath != '\\') {
936 d_printf("cli_resolve_path: "
937 "dfs_path (%s) not in correct format.\n",
942 ppath++; /* Now pointing at start of server name. */
944 if ((ppath = strchr_m( dfs_path, '\\' )) == NULL) {
948 ppath++; /* Now pointing at start of share name. */
950 if ((ppath = strchr_m( ppath+1, '\\' )) == NULL) {
954 ppath++; /* Now pointing at path component. */
956 newmount = talloc_asprintf(ctx, "%s\\%s", mountpt, ppath );
961 cli_set_mntpoint(*targetcli, newmount);
963 /* Check for another dfs referral, note that we are not
964 checking for loops here. */
966 if (!strequal(*pp_targetpath, "\\") && !strequal(*pp_targetpath, "/")) {
967 if (cli_resolve_path(ctx,
975 * When cli_resolve_path returns true here it's always
976 * returning the complete path in newpath, so we're done
980 *pp_targetpath = newpath;
987 /* If returning true ensure we return a dfs root full path. */
988 if ((*targetcli)->dfsroot) {
989 dfs_path = talloc_strdup(ctx, *pp_targetpath);
993 *pp_targetpath = cli_dfs_make_full_path(ctx, *targetcli, dfs_path);
999 /********************************************************************
1000 ********************************************************************/
1002 bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
1003 struct cli_state *cli,
1004 const char *sharename,
1005 char **pp_newserver,
1008 const char *username,
1009 const char *password,
1012 struct client_dfs_referral *refs = NULL;
1013 size_t num_refs = 0;
1014 size_t consumed = 0;
1015 char *fullpath = NULL;
1018 char *newextrapath = NULL;
1021 if (!cli || !sharename) {
1027 /* special case. never check for a referral on the IPC$ share */
1029 if (strequal(sharename, "IPC$")) {
1033 /* send a trans2_query_path_info to check for a referral */
1035 fullpath = talloc_asprintf(ctx, "\\%s\\%s", cli->desthost, sharename );
1040 /* check for the referral */
1042 if (!NT_STATUS_IS_OK(cli_tcon_andx(cli, "IPC$", "IPC", NULL, 0))) {
1046 if (force_encrypt) {
1047 status = cli_cm_force_encryption(cli,
1052 if (!NT_STATUS_IS_OK(status)) {
1057 res = cli_dfs_get_referral(ctx, cli, fullpath, &refs, &num_refs, &consumed);
1059 status = cli_tdis(cli);
1060 if (!NT_STATUS_IS_OK(status)) {
1066 if (!res || !num_refs) {
1070 if (!refs[0].dfspath) {
1074 if (!split_dfs_path(ctx, refs[0].dfspath, pp_newserver,
1075 pp_newshare, &newextrapath)) {
1079 /* check that this is not a self-referral */
1081 if (strequal(cli->desthost, *pp_newserver) &&
1082 strequal(sharename, *pp_newshare)) {