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e129384d7c
This patch introduces two new temporary helper functions vfs_stat_smb_fname and vfs_lstat_smb_fname. They basically allowed me to call the new smb_filename version of stat, while avoiding plumbing it through callers that are still too inconvenient. As the conversion moves along, I will be able to remove callers of this, with the goal being to remove all callers. There was also a bug in create_synthetic_smb_fname_split (also a temporary utility function) that caused it to incorrectly handle filenames with ':'s in them when in posix mode. This is now fixed.
1750 lines
43 KiB
C
1750 lines
43 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 3.0
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MSDFS services for Samba
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Copyright (C) Shirish Kalele 2000
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Copyright (C) Jeremy Allison 2007
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define DBGC_CLASS DBGC_MSDFS
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#include "includes.h"
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#include "smbd/globals.h"
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/**********************************************************************
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Parse a DFS pathname of the form \hostname\service\reqpath
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into the dfs_path structure.
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If POSIX pathnames is true, the pathname may also be of the
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form /hostname/service/reqpath.
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We cope with either here.
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Unfortunately, due to broken clients who might set the
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SVAL(inbuf,smb_flg2) & FLAGS2_DFS_PATHNAMES bit and then
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send a local path, we have to cope with that too....
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If conn != NULL then ensure the provided service is
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the one pointed to by the connection.
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This version does everything using pointers within one copy of the
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pathname string, talloced on the struct dfs_path pointer (which
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must be talloced). This may be too clever to live....
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JRA.
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**********************************************************************/
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static NTSTATUS parse_dfs_path(connection_struct *conn,
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const char *pathname,
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bool allow_wcards,
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struct dfs_path *pdp, /* MUST BE TALLOCED */
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bool *ppath_contains_wcard)
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{
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char *pathname_local;
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char *p,*temp;
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char *servicename;
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char *eos_ptr;
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NTSTATUS status = NT_STATUS_OK;
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char sepchar;
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ZERO_STRUCTP(pdp);
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/*
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* This is the only talloc we should need to do
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* on the struct dfs_path. All the pointers inside
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* it should point to offsets within this string.
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*/
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pathname_local = talloc_strdup(pdp, pathname);
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if (!pathname_local) {
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return NT_STATUS_NO_MEMORY;
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}
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/* Get a pointer to the terminating '\0' */
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eos_ptr = &pathname_local[strlen(pathname_local)];
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p = temp = pathname_local;
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pdp->posix_path = (lp_posix_pathnames() && *pathname == '/');
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sepchar = pdp->posix_path ? '/' : '\\';
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if (*pathname != sepchar) {
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DEBUG(10,("parse_dfs_path: path %s doesn't start with %c\n",
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pathname, sepchar ));
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/*
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* Possibly client sent a local path by mistake.
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* Try and convert to a local path.
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*/
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pdp->hostname = eos_ptr; /* "" */
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pdp->servicename = eos_ptr; /* "" */
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/* We've got no info about separators. */
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pdp->posix_path = lp_posix_pathnames();
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p = temp;
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DEBUG(10,("parse_dfs_path: trying to convert %s to a "
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"local path\n",
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temp));
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goto local_path;
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}
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/*
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* Safe to use on talloc'ed string as it only shrinks.
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* It also doesn't affect the eos_ptr.
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*/
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trim_char(temp,sepchar,sepchar);
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DEBUG(10,("parse_dfs_path: temp = |%s| after trimming %c's\n",
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temp, sepchar));
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/* Now tokenize. */
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/* Parse out hostname. */
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p = strchr_m(temp,sepchar);
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if(p == NULL) {
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DEBUG(10,("parse_dfs_path: can't parse hostname from path %s\n",
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temp));
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/*
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* Possibly client sent a local path by mistake.
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* Try and convert to a local path.
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*/
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pdp->hostname = eos_ptr; /* "" */
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pdp->servicename = eos_ptr; /* "" */
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p = temp;
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DEBUG(10,("parse_dfs_path: trying to convert %s "
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"to a local path\n",
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temp));
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goto local_path;
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}
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*p = '\0';
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pdp->hostname = temp;
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DEBUG(10,("parse_dfs_path: hostname: %s\n",pdp->hostname));
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/* Parse out servicename. */
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servicename = p+1;
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p = strchr_m(servicename,sepchar);
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if (p) {
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*p = '\0';
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}
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/* Is this really our servicename ? */
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if (conn && !( strequal(servicename, lp_servicename(SNUM(conn)))
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|| (strequal(servicename, HOMES_NAME)
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&& strequal(lp_servicename(SNUM(conn)),
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get_current_username()) )) ) {
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DEBUG(10,("parse_dfs_path: %s is not our servicename\n",
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servicename));
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/*
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* Possibly client sent a local path by mistake.
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* Try and convert to a local path.
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*/
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pdp->hostname = eos_ptr; /* "" */
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pdp->servicename = eos_ptr; /* "" */
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/* Repair the path - replace the sepchar's
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we nulled out */
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servicename--;
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*servicename = sepchar;
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if (p) {
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*p = sepchar;
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}
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p = temp;
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DEBUG(10,("parse_dfs_path: trying to convert %s "
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"to a local path\n",
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temp));
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goto local_path;
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}
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pdp->servicename = servicename;
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DEBUG(10,("parse_dfs_path: servicename: %s\n",pdp->servicename));
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if(p == NULL) {
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/* Client sent self referral \server\share. */
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pdp->reqpath = eos_ptr; /* "" */
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return NT_STATUS_OK;
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}
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p++;
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local_path:
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*ppath_contains_wcard = False;
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pdp->reqpath = p;
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/* Rest is reqpath. */
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if (pdp->posix_path) {
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status = check_path_syntax_posix(pdp->reqpath);
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} else {
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if (allow_wcards) {
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status = check_path_syntax_wcard(pdp->reqpath,
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ppath_contains_wcard);
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} else {
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status = check_path_syntax(pdp->reqpath);
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}
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}
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(10,("parse_dfs_path: '%s' failed with %s\n",
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p, nt_errstr(status) ));
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return status;
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}
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DEBUG(10,("parse_dfs_path: rest of the path: %s\n",pdp->reqpath));
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return NT_STATUS_OK;
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}
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/********************************************************
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Fake up a connection struct for the VFS layer.
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Note this CHANGES CWD !!!! JRA.
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*********************************************************/
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NTSTATUS create_conn_struct(TALLOC_CTX *ctx,
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connection_struct **pconn,
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int snum,
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const char *path,
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struct auth_serversupplied_info *server_info,
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char **poldcwd)
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{
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connection_struct *conn;
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char *connpath;
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char *oldcwd;
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conn = TALLOC_ZERO_P(ctx, connection_struct);
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if (conn == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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connpath = talloc_strdup(conn, path);
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if (!connpath) {
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TALLOC_FREE(conn);
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return NT_STATUS_NO_MEMORY;
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}
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connpath = talloc_string_sub(conn,
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connpath,
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"%S",
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lp_servicename(snum));
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if (!connpath) {
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TALLOC_FREE(conn);
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return NT_STATUS_NO_MEMORY;
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}
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/* needed for smbd_vfs_init() */
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if (!(conn->params = TALLOC_ZERO_P(conn, struct share_params))) {
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DEBUG(0, ("TALLOC failed\n"));
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TALLOC_FREE(conn);
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return NT_STATUS_NO_MEMORY;
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}
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conn->params->service = snum;
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if (server_info != NULL) {
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conn->server_info = copy_serverinfo(conn, server_info);
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if (conn->server_info == NULL) {
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DEBUG(0, ("copy_serverinfo failed\n"));
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TALLOC_FREE(conn);
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return NT_STATUS_NO_MEMORY;
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}
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}
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set_conn_connectpath(conn, connpath);
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if (!smbd_vfs_init(conn)) {
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NTSTATUS status = map_nt_error_from_unix(errno);
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DEBUG(0,("create_conn_struct: smbd_vfs_init failed.\n"));
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conn_free_internal(conn);
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return status;
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}
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conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn);
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/*
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* Windows seems to insist on doing trans2getdfsreferral() calls on
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* the IPC$ share as the anonymous user. If we try to chdir as that
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* user we will fail.... WTF ? JRA.
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*/
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oldcwd = vfs_GetWd(ctx, conn);
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if (oldcwd == NULL) {
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NTSTATUS status = map_nt_error_from_unix(errno);
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DEBUG(3, ("vfs_GetWd failed: %s\n", strerror(errno)));
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conn_free_internal(conn);
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return status;
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}
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if (vfs_ChDir(conn,conn->connectpath) != 0) {
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NTSTATUS status = map_nt_error_from_unix(errno);
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DEBUG(3,("create_conn_struct: Can't ChDir to new conn path %s. "
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"Error was %s\n",
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conn->connectpath, strerror(errno) ));
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conn_free_internal(conn);
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return status;
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}
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*pconn = conn;
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*poldcwd = oldcwd;
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return NT_STATUS_OK;
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}
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/**********************************************************************
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Parse the contents of a symlink to verify if it is an msdfs referral
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A valid referral is of the form:
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msdfs:server1\share1,server2\share2
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msdfs:server1\share1\pathname,server2\share2\pathname
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msdfs:server1/share1,server2/share2
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msdfs:server1/share1/pathname,server2/share2/pathname.
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Note that the alternate paths returned here must be of the canonicalized
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form:
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\server\share or
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\server\share\path\to\file,
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even in posix path mode. This is because we have no knowledge if the
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server we're referring to understands posix paths.
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**********************************************************************/
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static bool parse_msdfs_symlink(TALLOC_CTX *ctx,
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const char *target,
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struct referral **preflist,
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int *refcount)
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{
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char *temp = NULL;
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char *prot;
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char **alt_path = NULL;
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int count = 0, i;
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struct referral *reflist;
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char *saveptr;
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temp = talloc_strdup(ctx, target);
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if (!temp) {
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return False;
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}
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prot = strtok_r(temp, ":", &saveptr);
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if (!prot) {
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DEBUG(0,("parse_msdfs_symlink: invalid path !\n"));
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return False;
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}
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alt_path = TALLOC_ARRAY(ctx, char *, MAX_REFERRAL_COUNT);
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if (!alt_path) {
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return False;
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}
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/* parse out the alternate paths */
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while((count<MAX_REFERRAL_COUNT) &&
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((alt_path[count] = strtok_r(NULL, ",", &saveptr)) != NULL)) {
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count++;
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}
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DEBUG(10,("parse_msdfs_symlink: count=%d\n", count));
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if (count) {
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reflist = *preflist = TALLOC_ZERO_ARRAY(ctx,
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struct referral, count);
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if(reflist == NULL) {
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TALLOC_FREE(alt_path);
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return False;
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}
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} else {
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reflist = *preflist = NULL;
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}
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for(i=0;i<count;i++) {
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char *p;
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/* Canonicalize link target.
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* Replace all /'s in the path by a \ */
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string_replace(alt_path[i], '/', '\\');
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/* Remove leading '\\'s */
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p = alt_path[i];
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while (*p && (*p == '\\')) {
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p++;
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}
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reflist[i].alternate_path = talloc_asprintf(ctx,
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"\\%s",
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p);
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if (!reflist[i].alternate_path) {
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return False;
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}
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reflist[i].proximity = 0;
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reflist[i].ttl = REFERRAL_TTL;
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DEBUG(10, ("parse_msdfs_symlink: Created alt path: %s\n",
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reflist[i].alternate_path));
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}
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*refcount = count;
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TALLOC_FREE(alt_path);
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return True;
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}
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/**********************************************************************
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Returns true if the unix path is a valid msdfs symlink and also
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returns the target string from inside the link.
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**********************************************************************/
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static bool is_msdfs_link_internal(TALLOC_CTX *ctx,
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connection_struct *conn,
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const char *path,
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char **pp_link_target,
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SMB_STRUCT_STAT *sbufp)
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{
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SMB_STRUCT_STAT st;
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int referral_len = 0;
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#if defined(HAVE_BROKEN_READLINK)
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char link_target_buf[PATH_MAX];
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#else
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char link_target_buf[7];
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#endif
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size_t bufsize = 0;
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char *link_target = NULL;
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if (pp_link_target) {
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bufsize = 1024;
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link_target = TALLOC_ARRAY(ctx, char, bufsize);
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if (!link_target) {
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return False;
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}
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*pp_link_target = link_target;
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} else {
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bufsize = sizeof(link_target_buf);
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link_target = link_target_buf;
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}
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if (sbufp == NULL) {
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sbufp = &st;
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}
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if (vfs_lstat_smb_fname(conn, path, sbufp) != 0) {
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DEBUG(5,("is_msdfs_link_read_target: %s does not exist.\n",
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path));
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goto err;
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}
|
|
|
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if (!S_ISLNK(sbufp->st_ex_mode)) {
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DEBUG(5,("is_msdfs_link_read_target: %s is not a link.\n",
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path));
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goto err;
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}
|
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|
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referral_len = SMB_VFS_READLINK(conn, path, link_target, bufsize - 1);
|
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if (referral_len == -1) {
|
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DEBUG(0,("is_msdfs_link_read_target: Error reading "
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"msdfs link %s: %s\n",
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path, strerror(errno)));
|
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goto err;
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}
|
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link_target[referral_len] = '\0';
|
|
|
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DEBUG(5,("is_msdfs_link_internal: %s -> %s\n",path,
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link_target));
|
|
|
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if (!strnequal(link_target, "msdfs:", 6)) {
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goto err;
|
|
}
|
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return True;
|
|
|
|
err:
|
|
|
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if (link_target != link_target_buf) {
|
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TALLOC_FREE(link_target);
|
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}
|
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return False;
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}
|
|
|
|
/**********************************************************************
|
|
Returns true if the unix path is a valid msdfs symlink.
|
|
**********************************************************************/
|
|
|
|
bool is_msdfs_link(connection_struct *conn,
|
|
const char *path,
|
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SMB_STRUCT_STAT *sbufp)
|
|
{
|
|
return is_msdfs_link_internal(talloc_tos(),
|
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conn,
|
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path,
|
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NULL,
|
|
sbufp);
|
|
}
|
|
|
|
/*****************************************************************
|
|
Used by other functions to decide if a dfs path is remote,
|
|
and to get the list of referred locations for that remote path.
|
|
|
|
search_flag: For findfirsts, dfs links themselves are not
|
|
redirected, but paths beyond the links are. For normal smb calls,
|
|
even dfs links need to be redirected.
|
|
|
|
consumedcntp: how much of the dfs path is being redirected. the client
|
|
should try the remaining path on the redirected server.
|
|
|
|
If this returns NT_STATUS_PATH_NOT_COVERED the contents of the msdfs
|
|
link redirect are in targetpath.
|
|
*****************************************************************/
|
|
|
|
static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
|
|
connection_struct *conn,
|
|
const char *dfspath, /* Incoming complete dfs path */
|
|
const struct dfs_path *pdp, /* Parsed out
|
|
server+share+extrapath. */
|
|
bool search_flag, /* Called from a findfirst ? */
|
|
int *consumedcntp,
|
|
char **pp_targetpath)
|
|
{
|
|
char *p = NULL;
|
|
char *q = NULL;
|
|
NTSTATUS status;
|
|
struct smb_filename *smb_fname = NULL;
|
|
char *localpath = NULL;
|
|
char *canon_dfspath = NULL; /* Canonicalized dfs path. (only '/'
|
|
components). */
|
|
|
|
DEBUG(10,("dfs_path_lookup: Conn path = %s reqpath = %s\n",
|
|
conn->connectpath, pdp->reqpath));
|
|
|
|
/*
|
|
* Note the unix path conversion here we're doing we can
|
|
* throw away. We're looking for a symlink for a dfs
|
|
* resolution, if we don't find it we'll do another
|
|
* unix_convert later in the codepath.
|
|
* If we needed to remember what we'd resolved in
|
|
* dp->reqpath (as the original code did) we'd
|
|
* copy (localhost, dp->reqpath) on any code
|
|
* path below that returns True - but I don't
|
|
* think this is needed. JRA.
|
|
*/
|
|
|
|
status = unix_convert(ctx, conn, pdp->reqpath, &smb_fname,
|
|
search_flag ? UCF_ALLOW_WCARD_LCOMP : 0);
|
|
|
|
if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,
|
|
NT_STATUS_OBJECT_PATH_NOT_FOUND)) {
|
|
return status;
|
|
}
|
|
|
|
status = get_full_smb_filename(ctx, smb_fname, &localpath);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(smb_fname);
|
|
return status;
|
|
}
|
|
|
|
TALLOC_FREE(smb_fname);
|
|
|
|
/* Optimization - check if we can redirect the whole path. */
|
|
|
|
if (is_msdfs_link_internal(ctx, conn, localpath, pp_targetpath, NULL)) {
|
|
if (search_flag) {
|
|
DEBUG(6,("dfs_path_lookup (FindFirst) No redirection "
|
|
"for dfs link %s.\n", dfspath));
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
DEBUG(6,("dfs_path_lookup: %s resolves to a "
|
|
"valid dfs link %s.\n", dfspath,
|
|
pp_targetpath ? *pp_targetpath : ""));
|
|
|
|
if (consumedcntp) {
|
|
*consumedcntp = strlen(dfspath);
|
|
}
|
|
return NT_STATUS_PATH_NOT_COVERED;
|
|
}
|
|
|
|
/* Prepare to test only for '/' components in the given path,
|
|
* so if a Windows path replace all '\\' characters with '/'.
|
|
* For a POSIX DFS path we know all separators are already '/'. */
|
|
|
|
canon_dfspath = talloc_strdup(ctx, dfspath);
|
|
if (!canon_dfspath) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
if (!pdp->posix_path) {
|
|
string_replace(canon_dfspath, '\\', '/');
|
|
}
|
|
|
|
/*
|
|
* localpath comes out of unix_convert, so it has
|
|
* no trailing backslash. Make sure that canon_dfspath hasn't either.
|
|
* Fix for bug #4860 from Jan Martin <Jan.Martin@rwedea.com>.
|
|
*/
|
|
|
|
trim_char(canon_dfspath,0,'/');
|
|
|
|
/*
|
|
* Redirect if any component in the path is a link.
|
|
* We do this by walking backwards through the
|
|
* local path, chopping off the last component
|
|
* in both the local path and the canonicalized
|
|
* DFS path. If we hit a DFS link then we're done.
|
|
*/
|
|
|
|
p = strrchr_m(localpath, '/');
|
|
if (consumedcntp) {
|
|
q = strrchr_m(canon_dfspath, '/');
|
|
}
|
|
|
|
while (p) {
|
|
*p = '\0';
|
|
if (q) {
|
|
*q = '\0';
|
|
}
|
|
|
|
if (is_msdfs_link_internal(ctx, conn,
|
|
localpath, pp_targetpath, NULL)) {
|
|
DEBUG(4, ("dfs_path_lookup: Redirecting %s because "
|
|
"parent %s is dfs link\n", dfspath, localpath));
|
|
|
|
if (consumedcntp) {
|
|
*consumedcntp = strlen(canon_dfspath);
|
|
DEBUG(10, ("dfs_path_lookup: Path consumed: %s "
|
|
"(%d)\n",
|
|
canon_dfspath,
|
|
*consumedcntp));
|
|
}
|
|
|
|
return NT_STATUS_PATH_NOT_COVERED;
|
|
}
|
|
|
|
/* Step back on the filesystem. */
|
|
p = strrchr_m(localpath, '/');
|
|
|
|
if (consumedcntp) {
|
|
/* And in the canonicalized dfs path. */
|
|
q = strrchr_m(canon_dfspath, '/');
|
|
}
|
|
}
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/*****************************************************************
|
|
Decides if a dfs pathname should be redirected or not.
|
|
If not, the pathname is converted to a tcon-relative local unix path
|
|
|
|
search_wcard_flag: this flag performs 2 functions both related
|
|
to searches. See resolve_dfs_path() and parse_dfs_path_XX()
|
|
for details.
|
|
|
|
This function can return NT_STATUS_OK, meaning use the returned path as-is
|
|
(mapped into a local path).
|
|
or NT_STATUS_NOT_COVERED meaning return a DFS redirect, or
|
|
any other NT_STATUS error which is a genuine error to be
|
|
returned to the client.
|
|
*****************************************************************/
|
|
|
|
static NTSTATUS dfs_redirect(TALLOC_CTX *ctx,
|
|
connection_struct *conn,
|
|
const char *path_in,
|
|
bool search_wcard_flag,
|
|
char **pp_path_out,
|
|
bool *ppath_contains_wcard)
|
|
{
|
|
NTSTATUS status;
|
|
struct dfs_path *pdp = TALLOC_P(ctx, struct dfs_path);
|
|
|
|
if (!pdp) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
status = parse_dfs_path(conn, path_in, search_wcard_flag, pdp,
|
|
ppath_contains_wcard);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(pdp);
|
|
return status;
|
|
}
|
|
|
|
if (pdp->reqpath[0] == '\0') {
|
|
TALLOC_FREE(pdp);
|
|
*pp_path_out = talloc_strdup(ctx, "");
|
|
if (!*pp_path_out) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
DEBUG(5,("dfs_redirect: self-referral.\n"));
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/* If dfs pathname for a non-dfs share, convert to tcon-relative
|
|
path and return OK */
|
|
|
|
if (!lp_msdfs_root(SNUM(conn))) {
|
|
*pp_path_out = talloc_strdup(ctx, pdp->reqpath);
|
|
TALLOC_FREE(pdp);
|
|
if (!*pp_path_out) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/* If it looked like a local path (zero hostname/servicename)
|
|
* just treat as a tcon-relative path. */
|
|
|
|
if (pdp->hostname[0] == '\0' && pdp->servicename[0] == '\0') {
|
|
*pp_path_out = talloc_strdup(ctx, pdp->reqpath);
|
|
TALLOC_FREE(pdp);
|
|
if (!*pp_path_out) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
if (!( strequal(pdp->servicename, lp_servicename(SNUM(conn)))
|
|
|| (strequal(pdp->servicename, HOMES_NAME)
|
|
&& strequal(lp_servicename(SNUM(conn)),
|
|
conn->server_info->sanitized_username) )) ) {
|
|
|
|
/* The given sharename doesn't match this connection. */
|
|
TALLOC_FREE(pdp);
|
|
|
|
return NT_STATUS_OBJECT_PATH_NOT_FOUND;
|
|
}
|
|
|
|
status = dfs_path_lookup(ctx, conn, path_in, pdp,
|
|
search_wcard_flag, NULL, NULL);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
if (NT_STATUS_EQUAL(status, NT_STATUS_PATH_NOT_COVERED)) {
|
|
DEBUG(3,("dfs_redirect: Redirecting %s\n", path_in));
|
|
} else {
|
|
DEBUG(10,("dfs_redirect: dfs_path_lookup "
|
|
"failed for %s with %s\n",
|
|
path_in, nt_errstr(status) ));
|
|
}
|
|
return status;
|
|
}
|
|
|
|
DEBUG(3,("dfs_redirect: Not redirecting %s.\n", path_in));
|
|
|
|
/* Form non-dfs tcon-relative path */
|
|
*pp_path_out = talloc_strdup(ctx, pdp->reqpath);
|
|
TALLOC_FREE(pdp);
|
|
if (!*pp_path_out) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
DEBUG(3,("dfs_redirect: Path %s converted to non-dfs path %s\n",
|
|
path_in,
|
|
*pp_path_out));
|
|
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/**********************************************************************
|
|
Return a self referral.
|
|
**********************************************************************/
|
|
|
|
static NTSTATUS self_ref(TALLOC_CTX *ctx,
|
|
const char *dfs_path,
|
|
struct junction_map *jucn,
|
|
int *consumedcntp,
|
|
bool *self_referralp)
|
|
{
|
|
struct referral *ref;
|
|
|
|
*self_referralp = True;
|
|
|
|
jucn->referral_count = 1;
|
|
if((ref = TALLOC_ZERO_P(ctx, struct referral)) == NULL) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
ref->alternate_path = talloc_strdup(ctx, dfs_path);
|
|
if (!ref->alternate_path) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
ref->proximity = 0;
|
|
ref->ttl = REFERRAL_TTL;
|
|
jucn->referral_list = ref;
|
|
*consumedcntp = strlen(dfs_path);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
/**********************************************************************
|
|
Gets valid referrals for a dfs path and fills up the
|
|
junction_map structure.
|
|
**********************************************************************/
|
|
|
|
NTSTATUS get_referred_path(TALLOC_CTX *ctx,
|
|
const char *dfs_path,
|
|
struct junction_map *jucn,
|
|
int *consumedcntp,
|
|
bool *self_referralp)
|
|
{
|
|
struct connection_struct *conn;
|
|
char *targetpath = NULL;
|
|
int snum;
|
|
NTSTATUS status = NT_STATUS_NOT_FOUND;
|
|
bool dummy;
|
|
struct dfs_path *pdp = TALLOC_P(ctx, struct dfs_path);
|
|
char *oldpath;
|
|
|
|
if (!pdp) {
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
*self_referralp = False;
|
|
|
|
status = parse_dfs_path(NULL, dfs_path, False, pdp, &dummy);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return status;
|
|
}
|
|
|
|
jucn->service_name = talloc_strdup(ctx, pdp->servicename);
|
|
jucn->volume_name = talloc_strdup(ctx, pdp->reqpath);
|
|
if (!jucn->service_name || !jucn->volume_name) {
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
/* Verify the share is a dfs root */
|
|
snum = lp_servicenumber(jucn->service_name);
|
|
if(snum < 0) {
|
|
fstring service_name;
|
|
fstrcpy(service_name, jucn->service_name);
|
|
if ((snum = find_service(service_name)) < 0) {
|
|
return NT_STATUS_NOT_FOUND;
|
|
}
|
|
TALLOC_FREE(jucn->service_name);
|
|
jucn->service_name = talloc_strdup(ctx, service_name);
|
|
if (!jucn->service_name) {
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
|
|
if (!lp_msdfs_root(snum) && (*lp_msdfs_proxy(snum) == '\0')) {
|
|
DEBUG(3,("get_referred_path: |%s| in dfs path %s is not "
|
|
"a dfs root.\n",
|
|
pdp->servicename, dfs_path));
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NOT_FOUND;
|
|
}
|
|
|
|
/*
|
|
* Self referrals are tested with a anonymous IPC connection and
|
|
* a GET_DFS_REFERRAL call to \\server\share. (which means
|
|
* dp.reqpath[0] points to an empty string). create_conn_struct cd's
|
|
* into the directory and will fail if it cannot (as the anonymous
|
|
* user). Cope with this.
|
|
*/
|
|
|
|
if (pdp->reqpath[0] == '\0') {
|
|
char *tmp;
|
|
struct referral *ref;
|
|
|
|
if (*lp_msdfs_proxy(snum) == '\0') {
|
|
TALLOC_FREE(pdp);
|
|
return self_ref(ctx,
|
|
dfs_path,
|
|
jucn,
|
|
consumedcntp,
|
|
self_referralp);
|
|
}
|
|
|
|
/*
|
|
* It's an msdfs proxy share. Redirect to
|
|
* the configured target share.
|
|
*/
|
|
|
|
jucn->referral_count = 1;
|
|
if ((ref = TALLOC_ZERO_P(ctx, struct referral)) == NULL) {
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
if (!(tmp = talloc_strdup(ctx, lp_msdfs_proxy(snum)))) {
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
trim_string(tmp, "\\", 0);
|
|
|
|
ref->alternate_path = talloc_asprintf(ctx, "\\%s", tmp);
|
|
TALLOC_FREE(tmp);
|
|
|
|
if (!ref->alternate_path) {
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
|
|
if (pdp->reqpath[0] != '\0') {
|
|
ref->alternate_path = talloc_asprintf_append(
|
|
ref->alternate_path,
|
|
"%s",
|
|
pdp->reqpath);
|
|
if (!ref->alternate_path) {
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NO_MEMORY;
|
|
}
|
|
}
|
|
ref->proximity = 0;
|
|
ref->ttl = REFERRAL_TTL;
|
|
jucn->referral_list = ref;
|
|
*consumedcntp = strlen(dfs_path);
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
status = create_conn_struct(ctx, &conn, snum, lp_pathname(snum),
|
|
NULL, &oldpath);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
TALLOC_FREE(pdp);
|
|
return status;
|
|
}
|
|
|
|
/* If this is a DFS path dfs_lookup should return
|
|
* NT_STATUS_PATH_NOT_COVERED. */
|
|
|
|
status = dfs_path_lookup(ctx, conn, dfs_path, pdp,
|
|
False, consumedcntp, &targetpath);
|
|
|
|
if (!NT_STATUS_EQUAL(status, NT_STATUS_PATH_NOT_COVERED)) {
|
|
DEBUG(3,("get_referred_path: No valid referrals for path %s\n",
|
|
dfs_path));
|
|
vfs_ChDir(conn, oldpath);
|
|
conn_free_internal(conn);
|
|
TALLOC_FREE(pdp);
|
|
return status;
|
|
}
|
|
|
|
/* We know this is a valid dfs link. Parse the targetpath. */
|
|
if (!parse_msdfs_symlink(ctx, targetpath,
|
|
&jucn->referral_list,
|
|
&jucn->referral_count)) {
|
|
DEBUG(3,("get_referred_path: failed to parse symlink "
|
|
"target %s\n", targetpath ));
|
|
vfs_ChDir(conn, oldpath);
|
|
conn_free_internal(conn);
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_NOT_FOUND;
|
|
}
|
|
|
|
vfs_ChDir(conn, oldpath);
|
|
conn_free_internal(conn);
|
|
TALLOC_FREE(pdp);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
static int setup_ver2_dfs_referral(const char *pathname,
|
|
char **ppdata,
|
|
struct junction_map *junction,
|
|
bool self_referral)
|
|
{
|
|
char* pdata = *ppdata;
|
|
|
|
smb_ucs2_t *uni_requestedpath = NULL;
|
|
int uni_reqpathoffset1,uni_reqpathoffset2;
|
|
int uni_curroffset;
|
|
int requestedpathlen=0;
|
|
int offset;
|
|
int reply_size = 0;
|
|
int i=0;
|
|
|
|
DEBUG(10,("Setting up version2 referral\nRequested path:\n"));
|
|
|
|
requestedpathlen = rpcstr_push_talloc(talloc_tos(),
|
|
&uni_requestedpath, pathname);
|
|
if (uni_requestedpath == NULL || requestedpathlen == 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (DEBUGLVL(10)) {
|
|
dump_data(0, (unsigned char *)uni_requestedpath,
|
|
requestedpathlen);
|
|
}
|
|
|
|
DEBUG(10,("ref count = %u\n",junction->referral_count));
|
|
|
|
uni_reqpathoffset1 = REFERRAL_HEADER_SIZE +
|
|
VERSION2_REFERRAL_SIZE * junction->referral_count;
|
|
|
|
uni_reqpathoffset2 = uni_reqpathoffset1 + requestedpathlen;
|
|
|
|
uni_curroffset = uni_reqpathoffset2 + requestedpathlen;
|
|
|
|
reply_size = REFERRAL_HEADER_SIZE +
|
|
VERSION2_REFERRAL_SIZE*junction->referral_count +
|
|
2 * requestedpathlen;
|
|
DEBUG(10,("reply_size: %u\n",reply_size));
|
|
|
|
/* add up the unicode lengths of all the referral paths */
|
|
for(i=0;i<junction->referral_count;i++) {
|
|
DEBUG(10,("referral %u : %s\n",
|
|
i,
|
|
junction->referral_list[i].alternate_path));
|
|
reply_size +=
|
|
(strlen(junction->referral_list[i].alternate_path)+1)*2;
|
|
}
|
|
|
|
DEBUG(10,("reply_size = %u\n",reply_size));
|
|
/* add the unexplained 0x16 bytes */
|
|
reply_size += 0x16;
|
|
|
|
pdata = (char *)SMB_REALLOC(pdata,reply_size);
|
|
if(pdata == NULL) {
|
|
DEBUG(0,("Realloc failed!\n"));
|
|
return -1;
|
|
}
|
|
*ppdata = pdata;
|
|
|
|
/* copy in the dfs requested paths.. required for offset calculations */
|
|
memcpy(pdata+uni_reqpathoffset1,uni_requestedpath,requestedpathlen);
|
|
memcpy(pdata+uni_reqpathoffset2,uni_requestedpath,requestedpathlen);
|
|
|
|
/* create the header */
|
|
SSVAL(pdata,0,requestedpathlen - 2); /* UCS2 of path consumed minus
|
|
2 byte null */
|
|
/* number of referral in this pkt */
|
|
SSVAL(pdata,2,junction->referral_count);
|
|
if(self_referral) {
|
|
SIVAL(pdata,4,DFSREF_REFERRAL_SERVER | DFSREF_STORAGE_SERVER);
|
|
} else {
|
|
SIVAL(pdata,4,DFSREF_STORAGE_SERVER);
|
|
}
|
|
|
|
offset = 8;
|
|
/* add the referral elements */
|
|
for(i=0;i<junction->referral_count;i++) {
|
|
struct referral* ref = &junction->referral_list[i];
|
|
int unilen;
|
|
|
|
SSVAL(pdata,offset,2); /* version 2 */
|
|
SSVAL(pdata,offset+2,VERSION2_REFERRAL_SIZE);
|
|
if(self_referral) {
|
|
SSVAL(pdata,offset+4,1);
|
|
} else {
|
|
SSVAL(pdata,offset+4,0);
|
|
}
|
|
|
|
/* ref_flags :use path_consumed bytes? */
|
|
SSVAL(pdata,offset+6,0);
|
|
SIVAL(pdata,offset+8,ref->proximity);
|
|
SIVAL(pdata,offset+12,ref->ttl);
|
|
|
|
SSVAL(pdata,offset+16,uni_reqpathoffset1-offset);
|
|
SSVAL(pdata,offset+18,uni_reqpathoffset2-offset);
|
|
/* copy referred path into current offset */
|
|
unilen = rpcstr_push(pdata+uni_curroffset,
|
|
ref->alternate_path,
|
|
reply_size - uni_curroffset,
|
|
STR_UNICODE);
|
|
|
|
SSVAL(pdata,offset+20,uni_curroffset-offset);
|
|
|
|
uni_curroffset += unilen;
|
|
offset += VERSION2_REFERRAL_SIZE;
|
|
}
|
|
/* add in the unexplained 22 (0x16) bytes at the end */
|
|
memset(pdata+uni_curroffset,'\0',0x16);
|
|
return reply_size;
|
|
}
|
|
|
|
static int setup_ver3_dfs_referral(const char *pathname,
|
|
char **ppdata,
|
|
struct junction_map *junction,
|
|
bool self_referral)
|
|
{
|
|
char *pdata = *ppdata;
|
|
|
|
smb_ucs2_t *uni_reqpath = NULL;
|
|
int uni_reqpathoffset1, uni_reqpathoffset2;
|
|
int uni_curroffset;
|
|
int reply_size = 0;
|
|
|
|
int reqpathlen = 0;
|
|
int offset,i=0;
|
|
|
|
DEBUG(10,("setting up version3 referral\n"));
|
|
|
|
reqpathlen = rpcstr_push_talloc(talloc_tos(), &uni_reqpath, pathname);
|
|
if (uni_reqpath == NULL || reqpathlen == 0) {
|
|
return -1;
|
|
}
|
|
|
|
if (DEBUGLVL(10)) {
|
|
dump_data(0, (unsigned char *)uni_reqpath,
|
|
reqpathlen);
|
|
}
|
|
|
|
uni_reqpathoffset1 = REFERRAL_HEADER_SIZE +
|
|
VERSION3_REFERRAL_SIZE * junction->referral_count;
|
|
uni_reqpathoffset2 = uni_reqpathoffset1 + reqpathlen;
|
|
reply_size = uni_curroffset = uni_reqpathoffset2 + reqpathlen;
|
|
|
|
for(i=0;i<junction->referral_count;i++) {
|
|
DEBUG(10,("referral %u : %s\n",
|
|
i,
|
|
junction->referral_list[i].alternate_path));
|
|
reply_size +=
|
|
(strlen(junction->referral_list[i].alternate_path)+1)*2;
|
|
}
|
|
|
|
pdata = (char *)SMB_REALLOC(pdata,reply_size);
|
|
if(pdata == NULL) {
|
|
DEBUG(0,("version3 referral setup:"
|
|
"malloc failed for Realloc!\n"));
|
|
return -1;
|
|
}
|
|
*ppdata = pdata;
|
|
|
|
/* create the header */
|
|
SSVAL(pdata,0,reqpathlen - 2); /* UCS2 of path consumed minus
|
|
2 byte null */
|
|
SSVAL(pdata,2,junction->referral_count); /* number of referral */
|
|
if(self_referral) {
|
|
SIVAL(pdata,4,DFSREF_REFERRAL_SERVER | DFSREF_STORAGE_SERVER);
|
|
} else {
|
|
SIVAL(pdata,4,DFSREF_STORAGE_SERVER);
|
|
}
|
|
|
|
/* copy in the reqpaths */
|
|
memcpy(pdata+uni_reqpathoffset1,uni_reqpath,reqpathlen);
|
|
memcpy(pdata+uni_reqpathoffset2,uni_reqpath,reqpathlen);
|
|
|
|
offset = 8;
|
|
for(i=0;i<junction->referral_count;i++) {
|
|
struct referral* ref = &(junction->referral_list[i]);
|
|
int unilen;
|
|
|
|
SSVAL(pdata,offset,3); /* version 3 */
|
|
SSVAL(pdata,offset+2,VERSION3_REFERRAL_SIZE);
|
|
if(self_referral) {
|
|
SSVAL(pdata,offset+4,1);
|
|
} else {
|
|
SSVAL(pdata,offset+4,0);
|
|
}
|
|
|
|
/* ref_flags :use path_consumed bytes? */
|
|
SSVAL(pdata,offset+6,0);
|
|
SIVAL(pdata,offset+8,ref->ttl);
|
|
|
|
SSVAL(pdata,offset+12,uni_reqpathoffset1-offset);
|
|
SSVAL(pdata,offset+14,uni_reqpathoffset2-offset);
|
|
/* copy referred path into current offset */
|
|
unilen = rpcstr_push(pdata+uni_curroffset,ref->alternate_path,
|
|
reply_size - uni_curroffset,
|
|
STR_UNICODE | STR_TERMINATE);
|
|
SSVAL(pdata,offset+16,uni_curroffset-offset);
|
|
/* copy 0x10 bytes of 00's in the ServiceSite GUID */
|
|
memset(pdata+offset+18,'\0',16);
|
|
|
|
uni_curroffset += unilen;
|
|
offset += VERSION3_REFERRAL_SIZE;
|
|
}
|
|
return reply_size;
|
|
}
|
|
|
|
/******************************************************************
|
|
Set up the DFS referral for the dfs pathname. This call returns
|
|
the amount of the path covered by this server, and where the
|
|
client should be redirected to. This is the meat of the
|
|
TRANS2_GET_DFS_REFERRAL call.
|
|
******************************************************************/
|
|
|
|
int setup_dfs_referral(connection_struct *orig_conn,
|
|
const char *dfs_path,
|
|
int max_referral_level,
|
|
char **ppdata, NTSTATUS *pstatus)
|
|
{
|
|
struct junction_map *junction = NULL;
|
|
int consumedcnt = 0;
|
|
bool self_referral = False;
|
|
int reply_size = 0;
|
|
char *pathnamep = NULL;
|
|
char *local_dfs_path = NULL;
|
|
TALLOC_CTX *ctx;
|
|
|
|
if (!(ctx=talloc_init("setup_dfs_referral"))) {
|
|
*pstatus = NT_STATUS_NO_MEMORY;
|
|
return -1;
|
|
}
|
|
|
|
/* get the junction entry */
|
|
if (!dfs_path) {
|
|
talloc_destroy(ctx);
|
|
*pstatus = NT_STATUS_NOT_FOUND;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Trim pathname sent by client so it begins with only one backslash.
|
|
* Two backslashes confuse some dfs clients
|
|
*/
|
|
|
|
local_dfs_path = talloc_strdup(ctx,dfs_path);
|
|
if (!local_dfs_path) {
|
|
*pstatus = NT_STATUS_NO_MEMORY;
|
|
talloc_destroy(ctx);
|
|
return -1;
|
|
}
|
|
pathnamep = local_dfs_path;
|
|
while (IS_DIRECTORY_SEP(pathnamep[0]) &&
|
|
IS_DIRECTORY_SEP(pathnamep[1])) {
|
|
pathnamep++;
|
|
}
|
|
|
|
junction = TALLOC_ZERO_P(ctx, struct junction_map);
|
|
if (!junction) {
|
|
*pstatus = NT_STATUS_NO_MEMORY;
|
|
talloc_destroy(ctx);
|
|
return -1;
|
|
}
|
|
|
|
/* The following call can change cwd. */
|
|
*pstatus = get_referred_path(ctx, pathnamep, junction,
|
|
&consumedcnt, &self_referral);
|
|
if (!NT_STATUS_IS_OK(*pstatus)) {
|
|
vfs_ChDir(orig_conn,orig_conn->connectpath);
|
|
talloc_destroy(ctx);
|
|
return -1;
|
|
}
|
|
vfs_ChDir(orig_conn,orig_conn->connectpath);
|
|
|
|
if (!self_referral) {
|
|
pathnamep[consumedcnt] = '\0';
|
|
|
|
if( DEBUGLVL( 3 ) ) {
|
|
int i=0;
|
|
dbgtext("setup_dfs_referral: Path %s to "
|
|
"alternate path(s):",
|
|
pathnamep);
|
|
for(i=0;i<junction->referral_count;i++)
|
|
dbgtext(" %s",
|
|
junction->referral_list[i].alternate_path);
|
|
dbgtext(".\n");
|
|
}
|
|
}
|
|
|
|
/* create the referral depeding on version */
|
|
DEBUG(10,("max_referral_level :%d\n",max_referral_level));
|
|
|
|
if (max_referral_level < 2) {
|
|
max_referral_level = 2;
|
|
}
|
|
if (max_referral_level > 3) {
|
|
max_referral_level = 3;
|
|
}
|
|
|
|
switch(max_referral_level) {
|
|
case 2:
|
|
reply_size = setup_ver2_dfs_referral(pathnamep,
|
|
ppdata, junction,
|
|
self_referral);
|
|
break;
|
|
case 3:
|
|
reply_size = setup_ver3_dfs_referral(pathnamep, ppdata,
|
|
junction, self_referral);
|
|
break;
|
|
default:
|
|
DEBUG(0,("setup_dfs_referral: Invalid dfs referral "
|
|
"version: %d\n",
|
|
max_referral_level));
|
|
talloc_destroy(ctx);
|
|
*pstatus = NT_STATUS_INVALID_LEVEL;
|
|
return -1;
|
|
}
|
|
|
|
if (DEBUGLVL(10)) {
|
|
DEBUGADD(0,("DFS Referral pdata:\n"));
|
|
dump_data(0,(uint8 *)*ppdata,reply_size);
|
|
}
|
|
|
|
talloc_destroy(ctx);
|
|
*pstatus = NT_STATUS_OK;
|
|
return reply_size;
|
|
}
|
|
|
|
/**********************************************************************
|
|
The following functions are called by the NETDFS RPC pipe functions
|
|
**********************************************************************/
|
|
|
|
/*********************************************************************
|
|
Creates a junction structure from a DFS pathname
|
|
**********************************************************************/
|
|
|
|
bool create_junction(TALLOC_CTX *ctx,
|
|
const char *dfs_path,
|
|
struct junction_map *jucn)
|
|
{
|
|
int snum;
|
|
bool dummy;
|
|
struct dfs_path *pdp = TALLOC_P(ctx,struct dfs_path);
|
|
NTSTATUS status;
|
|
|
|
if (!pdp) {
|
|
return False;
|
|
}
|
|
status = parse_dfs_path(NULL, dfs_path, False, pdp, &dummy);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return False;
|
|
}
|
|
|
|
/* check if path is dfs : validate first token */
|
|
if (!is_myname_or_ipaddr(pdp->hostname)) {
|
|
DEBUG(4,("create_junction: Invalid hostname %s "
|
|
"in dfs path %s\n",
|
|
pdp->hostname, dfs_path));
|
|
TALLOC_FREE(pdp);
|
|
return False;
|
|
}
|
|
|
|
/* Check for a non-DFS share */
|
|
snum = lp_servicenumber(pdp->servicename);
|
|
|
|
if(snum < 0 || !lp_msdfs_root(snum)) {
|
|
DEBUG(4,("create_junction: %s is not an msdfs root.\n",
|
|
pdp->servicename));
|
|
TALLOC_FREE(pdp);
|
|
return False;
|
|
}
|
|
|
|
jucn->service_name = talloc_strdup(ctx, pdp->servicename);
|
|
jucn->volume_name = talloc_strdup(ctx, pdp->reqpath);
|
|
jucn->comment = talloc_strdup(ctx, lp_comment(snum));
|
|
|
|
TALLOC_FREE(pdp);
|
|
if (!jucn->service_name || !jucn->volume_name || ! jucn->comment) {
|
|
return False;
|
|
}
|
|
return True;
|
|
}
|
|
|
|
/**********************************************************************
|
|
Forms a valid Unix pathname from the junction
|
|
**********************************************************************/
|
|
|
|
static bool junction_to_local_path(const struct junction_map *jucn,
|
|
char **pp_path_out,
|
|
connection_struct **conn_out,
|
|
char **oldpath)
|
|
{
|
|
int snum;
|
|
NTSTATUS status;
|
|
|
|
snum = lp_servicenumber(jucn->service_name);
|
|
if(snum < 0) {
|
|
return False;
|
|
}
|
|
status = create_conn_struct(talloc_tos(), conn_out, snum,
|
|
lp_pathname(snum), NULL, oldpath);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
return False;
|
|
}
|
|
|
|
*pp_path_out = talloc_asprintf(*conn_out,
|
|
"%s/%s",
|
|
lp_pathname(snum),
|
|
jucn->volume_name);
|
|
if (!*pp_path_out) {
|
|
vfs_ChDir(*conn_out, *oldpath);
|
|
conn_free_internal(*conn_out);
|
|
return False;
|
|
}
|
|
return True;
|
|
}
|
|
|
|
bool create_msdfs_link(const struct junction_map *jucn)
|
|
{
|
|
char *path = NULL;
|
|
char *cwd;
|
|
char *msdfs_link = NULL;
|
|
connection_struct *conn;
|
|
int i=0;
|
|
bool insert_comma = False;
|
|
bool ret = False;
|
|
|
|
if(!junction_to_local_path(jucn, &path, &conn, &cwd)) {
|
|
return False;
|
|
}
|
|
|
|
/* Form the msdfs_link contents */
|
|
msdfs_link = talloc_strdup(conn, "msdfs:");
|
|
if (!msdfs_link) {
|
|
goto out;
|
|
}
|
|
for(i=0; i<jucn->referral_count; i++) {
|
|
char *refpath = jucn->referral_list[i].alternate_path;
|
|
|
|
/* Alternate paths always use Windows separators. */
|
|
trim_char(refpath, '\\', '\\');
|
|
if(*refpath == '\0') {
|
|
if (i == 0) {
|
|
insert_comma = False;
|
|
}
|
|
continue;
|
|
}
|
|
if (i > 0 && insert_comma) {
|
|
msdfs_link = talloc_asprintf_append_buffer(msdfs_link,
|
|
",%s",
|
|
refpath);
|
|
} else {
|
|
msdfs_link = talloc_asprintf_append_buffer(msdfs_link,
|
|
"%s",
|
|
refpath);
|
|
}
|
|
|
|
if (!msdfs_link) {
|
|
goto out;
|
|
}
|
|
if (!insert_comma) {
|
|
insert_comma = True;
|
|
}
|
|
}
|
|
|
|
DEBUG(5,("create_msdfs_link: Creating new msdfs link: %s -> %s\n",
|
|
path, msdfs_link));
|
|
|
|
if(SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
|
|
if (errno == EEXIST) {
|
|
if(SMB_VFS_UNLINK(conn,path)!=0) {
|
|
goto out;
|
|
}
|
|
}
|
|
if (SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
|
|
DEBUG(1,("create_msdfs_link: symlink failed "
|
|
"%s -> %s\nError: %s\n",
|
|
path, msdfs_link, strerror(errno)));
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = True;
|
|
|
|
out:
|
|
vfs_ChDir(conn, cwd);
|
|
conn_free_internal(conn);
|
|
return ret;
|
|
}
|
|
|
|
bool remove_msdfs_link(const struct junction_map *jucn)
|
|
{
|
|
char *path = NULL;
|
|
char *cwd;
|
|
connection_struct *conn;
|
|
bool ret = False;
|
|
|
|
if (!junction_to_local_path(jucn, &path, &conn, &cwd)) {
|
|
return false;
|
|
}
|
|
|
|
if( SMB_VFS_UNLINK(conn, path) == 0 ) {
|
|
ret = True;
|
|
}
|
|
|
|
vfs_ChDir(conn, cwd);
|
|
conn_free_internal(conn);
|
|
return ret;
|
|
}
|
|
|
|
/*********************************************************************
|
|
Return the number of DFS links at the root of this share.
|
|
*********************************************************************/
|
|
|
|
static int count_dfs_links(TALLOC_CTX *ctx, int snum)
|
|
{
|
|
size_t cnt = 0;
|
|
SMB_STRUCT_DIR *dirp = NULL;
|
|
char *dname = NULL;
|
|
const char *connect_path = lp_pathname(snum);
|
|
const char *msdfs_proxy = lp_msdfs_proxy(snum);
|
|
connection_struct *conn;
|
|
NTSTATUS status;
|
|
char *cwd;
|
|
|
|
if(*connect_path == '\0') {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Fake up a connection struct for the VFS layer.
|
|
*/
|
|
|
|
status = create_conn_struct(talloc_tos(), &conn, snum, connect_path,
|
|
NULL, &cwd);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(3, ("create_conn_struct failed: %s\n",
|
|
nt_errstr(status)));
|
|
return 0;
|
|
}
|
|
|
|
/* Count a link for the msdfs root - convention */
|
|
cnt = 1;
|
|
|
|
/* No more links if this is an msdfs proxy. */
|
|
if (*msdfs_proxy != '\0') {
|
|
goto out;
|
|
}
|
|
|
|
/* Now enumerate all dfs links */
|
|
dirp = SMB_VFS_OPENDIR(conn, ".", NULL, 0);
|
|
if(!dirp) {
|
|
goto out;
|
|
}
|
|
|
|
while ((dname = vfs_readdirname(conn, dirp, NULL)) != NULL) {
|
|
if (is_msdfs_link(conn,
|
|
dname,
|
|
NULL)) {
|
|
cnt++;
|
|
}
|
|
}
|
|
|
|
SMB_VFS_CLOSEDIR(conn,dirp);
|
|
|
|
out:
|
|
vfs_ChDir(conn, cwd);
|
|
conn_free_internal(conn);
|
|
return cnt;
|
|
}
|
|
|
|
/*********************************************************************
|
|
*********************************************************************/
|
|
|
|
static int form_junctions(TALLOC_CTX *ctx,
|
|
int snum,
|
|
struct junction_map *jucn,
|
|
size_t jn_remain)
|
|
{
|
|
size_t cnt = 0;
|
|
SMB_STRUCT_DIR *dirp = NULL;
|
|
char *dname = NULL;
|
|
const char *connect_path = lp_pathname(snum);
|
|
char *service_name = lp_servicename(snum);
|
|
const char *msdfs_proxy = lp_msdfs_proxy(snum);
|
|
connection_struct *conn;
|
|
struct referral *ref = NULL;
|
|
char *cwd;
|
|
NTSTATUS status;
|
|
|
|
if (jn_remain == 0) {
|
|
return 0;
|
|
}
|
|
|
|
if(*connect_path == '\0') {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Fake up a connection struct for the VFS layer.
|
|
*/
|
|
|
|
status = create_conn_struct(ctx, &conn, snum, connect_path, NULL,
|
|
&cwd);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(3, ("create_conn_struct failed: %s\n",
|
|
nt_errstr(status)));
|
|
return 0;
|
|
}
|
|
|
|
/* form a junction for the msdfs root - convention
|
|
DO NOT REMOVE THIS: NT clients will not work with us
|
|
if this is not present
|
|
*/
|
|
jucn[cnt].service_name = talloc_strdup(ctx,service_name);
|
|
jucn[cnt].volume_name = talloc_strdup(ctx, "");
|
|
if (!jucn[cnt].service_name || !jucn[cnt].volume_name) {
|
|
goto out;
|
|
}
|
|
jucn[cnt].comment = "";
|
|
jucn[cnt].referral_count = 1;
|
|
|
|
ref = jucn[cnt].referral_list = TALLOC_ZERO_P(ctx, struct referral);
|
|
if (jucn[cnt].referral_list == NULL) {
|
|
goto out;
|
|
}
|
|
|
|
ref->proximity = 0;
|
|
ref->ttl = REFERRAL_TTL;
|
|
if (*msdfs_proxy != '\0') {
|
|
ref->alternate_path = talloc_strdup(ctx,
|
|
msdfs_proxy);
|
|
} else {
|
|
ref->alternate_path = talloc_asprintf(ctx,
|
|
"\\\\%s\\%s",
|
|
get_local_machine_name(),
|
|
service_name);
|
|
}
|
|
|
|
if (!ref->alternate_path) {
|
|
goto out;
|
|
}
|
|
cnt++;
|
|
|
|
/* Don't enumerate if we're an msdfs proxy. */
|
|
if (*msdfs_proxy != '\0') {
|
|
goto out;
|
|
}
|
|
|
|
/* Now enumerate all dfs links */
|
|
dirp = SMB_VFS_OPENDIR(conn, ".", NULL, 0);
|
|
if(!dirp) {
|
|
goto out;
|
|
}
|
|
|
|
while ((dname = vfs_readdirname(conn, dirp, NULL)) != NULL) {
|
|
char *link_target = NULL;
|
|
if (cnt >= jn_remain) {
|
|
DEBUG(2, ("form_junctions: ran out of MSDFS "
|
|
"junction slots"));
|
|
goto out;
|
|
}
|
|
if (is_msdfs_link_internal(ctx,
|
|
conn,
|
|
dname, &link_target,
|
|
NULL)) {
|
|
if (parse_msdfs_symlink(ctx,
|
|
link_target,
|
|
&jucn[cnt].referral_list,
|
|
&jucn[cnt].referral_count)) {
|
|
|
|
jucn[cnt].service_name = talloc_strdup(ctx,
|
|
service_name);
|
|
jucn[cnt].volume_name = talloc_strdup(ctx,
|
|
dname);
|
|
if (!jucn[cnt].service_name ||
|
|
!jucn[cnt].volume_name) {
|
|
goto out;
|
|
}
|
|
jucn[cnt].comment = "";
|
|
cnt++;
|
|
}
|
|
TALLOC_FREE(link_target);
|
|
}
|
|
}
|
|
|
|
out:
|
|
|
|
if (dirp) {
|
|
SMB_VFS_CLOSEDIR(conn,dirp);
|
|
}
|
|
|
|
vfs_ChDir(conn, cwd);
|
|
conn_free_internal(conn);
|
|
return cnt;
|
|
}
|
|
|
|
struct junction_map *enum_msdfs_links(TALLOC_CTX *ctx, size_t *p_num_jn)
|
|
{
|
|
struct junction_map *jn = NULL;
|
|
int i=0;
|
|
size_t jn_count = 0;
|
|
int sharecount = 0;
|
|
|
|
*p_num_jn = 0;
|
|
if(!lp_host_msdfs()) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Ensure all the usershares are loaded. */
|
|
become_root();
|
|
load_registry_shares();
|
|
sharecount = load_usershare_shares();
|
|
unbecome_root();
|
|
|
|
for(i=0;i < sharecount;i++) {
|
|
if(lp_msdfs_root(i)) {
|
|
jn_count += count_dfs_links(ctx, i);
|
|
}
|
|
}
|
|
if (jn_count == 0) {
|
|
return NULL;
|
|
}
|
|
jn = TALLOC_ARRAY(ctx, struct junction_map, jn_count);
|
|
if (!jn) {
|
|
return NULL;
|
|
}
|
|
for(i=0; i < sharecount; i++) {
|
|
if (*p_num_jn >= jn_count) {
|
|
break;
|
|
}
|
|
if(lp_msdfs_root(i)) {
|
|
*p_num_jn += form_junctions(ctx, i,
|
|
&jn[*p_num_jn],
|
|
jn_count - *p_num_jn);
|
|
}
|
|
}
|
|
return jn;
|
|
}
|
|
|
|
/******************************************************************************
|
|
Core function to resolve a dfs pathname.
|
|
******************************************************************************/
|
|
|
|
NTSTATUS resolve_dfspath(TALLOC_CTX *ctx,
|
|
connection_struct *conn,
|
|
bool dfs_pathnames,
|
|
const char *name_in,
|
|
char **pp_name_out)
|
|
{
|
|
NTSTATUS status = NT_STATUS_OK;
|
|
bool dummy;
|
|
if (dfs_pathnames) {
|
|
status = dfs_redirect(ctx,
|
|
conn,
|
|
name_in,
|
|
False,
|
|
pp_name_out,
|
|
&dummy);
|
|
} else {
|
|
/*
|
|
* Cheat and just return a copy of the in ptr.
|
|
* Once srvstr_get_path() uses talloc it'll
|
|
* be a talloced ptr anyway.
|
|
*/
|
|
*pp_name_out = CONST_DISCARD(char *,name_in);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/******************************************************************************
|
|
Core function to resolve a dfs pathname possibly containing a wildcard.
|
|
This function is identical to the above except for the bool param to
|
|
dfs_redirect but I need this to be separate so it's really clear when
|
|
we're allowing wildcards and when we're not. JRA.
|
|
******************************************************************************/
|
|
|
|
NTSTATUS resolve_dfspath_wcard(TALLOC_CTX *ctx,
|
|
connection_struct *conn,
|
|
bool dfs_pathnames,
|
|
const char *name_in,
|
|
char **pp_name_out,
|
|
bool *ppath_contains_wcard)
|
|
{
|
|
NTSTATUS status = NT_STATUS_OK;
|
|
if (dfs_pathnames) {
|
|
status = dfs_redirect(ctx,
|
|
conn,
|
|
name_in,
|
|
True,
|
|
pp_name_out,
|
|
ppath_contains_wcard);
|
|
} else {
|
|
/*
|
|
* Cheat and just return a copy of the in ptr.
|
|
* Once srvstr_get_path() uses talloc it'll
|
|
* be a talloced ptr anyway.
|
|
*/
|
|
*pp_name_out = CONST_DISCARD(char *,name_in);
|
|
}
|
|
return status;
|
|
}
|