s3-smbd provide struct smbd_server_connection * to conn_snum_used
[nivanova/samba-autobuild/.git] / source3 / smbd / msdfs.c
index ff55904b81caba3bb8b7cda2a83bc2b6dfe956a6..085834b4ee91ba94147e2322c1cb8823f955f31f 100644 (file)
 
 #define DBGC_CLASS DBGC_MSDFS
 #include "includes.h"
-
-extern uint32 global_client_caps;
+#include "system/filesys.h"
+#include "smbd/smbd.h"
+#include "smbd/globals.h"
+#include "msdfs.h"
+#include "auth.h"
 
 /**********************************************************************
  Parse a DFS pathname of the form \hostname\service\reqpath
@@ -36,19 +39,25 @@ extern uint32 global_client_caps;
  SVAL(inbuf,smb_flg2) & FLAGS2_DFS_PATHNAMES bit and then
  send a local path, we have to cope with that too....
 
+ If conn != NULL then ensure the provided service is
+ the one pointed to by the connection.
+
  This version does everything using pointers within one copy of the
  pathname string, talloced on the struct dfs_path pointer (which
  must be talloced). This may be too clever to live....
  JRA.
 **********************************************************************/
 
-static NTSTATUS parse_dfs_path(const char *pathname,
-                               BOOL allow_wcards,
+static NTSTATUS parse_dfs_path(connection_struct *conn,
+                               const char *pathname,
+                               bool allow_wcards,
                                struct dfs_path *pdp, /* MUST BE TALLOCED */
-                               BOOL *ppath_contains_wcard)
+                               bool *ppath_contains_wcard)
 {
+       struct smbd_server_connection *sconn = smbd_server_conn;
        char *pathname_local;
        char *p,*temp;
+       char *servicename;
        char *eos_ptr;
        NTSTATUS status = NT_STATUS_OK;
        char sepchar;
@@ -73,7 +82,7 @@ static NTSTATUS parse_dfs_path(const char *pathname,
 
        sepchar = pdp->posix_path ? '/' : '\\';
 
-       if (*pathname != sepchar) {
+       if (!sconn->using_smb2 && (*pathname != sepchar)) {
                DEBUG(10,("parse_dfs_path: path %s doesn't start with %c\n",
                        pathname, sepchar ));
                /*
@@ -127,13 +136,21 @@ static NTSTATUS parse_dfs_path(const char *pathname,
 
        DEBUG(10,("parse_dfs_path: hostname: %s\n",pdp->hostname));
 
-       /* If we got a hostname, is it ours (or an IP address) ? */
-       if (!is_myname_or_ipaddr(pdp->hostname)) {
-               /* Repair path. */
-               *p = sepchar;
-               DEBUG(10,("parse_dfs_path: hostname %s isn't ours. "
-                       "Try local path from path %s\n",
-                       pdp->hostname, temp));
+       /* Parse out servicename. */
+       servicename = p+1;
+       p = strchr_m(servicename,sepchar);
+       if (p) {
+               *p = '\0';
+       }
+
+       /* Is this really our servicename ? */
+       if (conn && !( strequal(servicename, lp_servicename(SNUM(conn)))
+                       || (strequal(servicename, HOMES_NAME)
+                       && strequal(lp_servicename(SNUM(conn)),
+                               get_current_username()) )) ) {
+               DEBUG(10,("parse_dfs_path: %s is not our servicename\n",
+                       servicename));
+
                /*
                 * Possibly client sent a local path by mistake.
                 * Try and convert to a local path.
@@ -142,6 +159,14 @@ static NTSTATUS parse_dfs_path(const char *pathname,
                pdp->hostname = eos_ptr; /* "" */
                pdp->servicename = eos_ptr; /* "" */
 
+               /* Repair the path - replace the sepchar's
+                  we nulled out */
+               servicename--;
+               *servicename = sepchar;
+               if (p) {
+                       *p = sepchar;
+               }
+
                p = temp;
                DEBUG(10,("parse_dfs_path: trying to convert %s "
                        "to a local path\n",
@@ -149,17 +174,15 @@ static NTSTATUS parse_dfs_path(const char *pathname,
                goto local_path;
        }
 
-       /* Parse out servicename. */
-       temp = p+1;
-       p = strchr_m(temp,sepchar);
+       pdp->servicename = servicename;
+
+       DEBUG(10,("parse_dfs_path: servicename: %s\n",pdp->servicename));
+
        if(p == NULL) {
-               pdp->servicename = temp;
+               /* Client sent self referral \server\share. */
                pdp->reqpath = eos_ptr; /* "" */
                return NT_STATUS_OK;
        }
-       *p = '\0';
-       pdp->servicename = temp;
-       DEBUG(10,("parse_dfs_path: servicename: %s\n",pdp->servicename));
 
        p++;
 
@@ -193,59 +216,110 @@ static NTSTATUS parse_dfs_path(const char *pathname,
 
 /********************************************************
  Fake up a connection struct for the VFS layer.
- Note this CHANGES CWD !!!! JRA.
+ Note: this performs a vfs connect and CHANGES CWD !!!! JRA.
 *********************************************************/
 
-static NTSTATUS create_conn_struct(connection_struct *conn,
+NTSTATUS create_conn_struct(TALLOC_CTX *ctx,
+                               connection_struct **pconn,
                                int snum,
-                               const char *path)
+                               const char *path,
+                               const struct auth_serversupplied_info *session_info,
+                               char **poldcwd)
 {
-       pstring connpath;
-
-       ZERO_STRUCTP(conn);
-
-       pstrcpy(connpath, path);
-       pstring_sub(connpath , "%S", lp_servicename(snum));
+       connection_struct *conn;
+       char *connpath;
+       char *oldcwd;
+       const char *vfs_user;
 
-       /* needed for smbd_vfs_init() */
+       conn = TALLOC_ZERO_P(ctx, connection_struct);
+       if (conn == NULL) {
+               return NT_STATUS_NO_MEMORY;
+       }
 
-       if ((conn->mem_ctx=talloc_init("connection_struct")) == NULL) {
-               DEBUG(0,("talloc_init(connection_struct) failed!\n"));
+       connpath = talloc_strdup(conn, path);
+       if (!connpath) {
+               TALLOC_FREE(conn);
+               return NT_STATUS_NO_MEMORY;
+       }
+       connpath = talloc_string_sub(conn,
+                               connpath,
+                               "%S",
+                               lp_servicename(snum));
+       if (!connpath) {
+               TALLOC_FREE(conn);
                return NT_STATUS_NO_MEMORY;
        }
 
-       if (!(conn->params = TALLOC_ZERO_P(conn->mem_ctx,
-                                       struct share_params))) {
+       /* needed for smbd_vfs_init() */
+
+       if (!(conn->params = TALLOC_ZERO_P(conn, struct share_params))) {
                DEBUG(0, ("TALLOC failed\n"));
+               TALLOC_FREE(conn);
                return NT_STATUS_NO_MEMORY;
        }
 
        conn->params->service = snum;
 
+       conn->sconn = smbd_server_conn;
+       conn->sconn->num_tcons_open++;
+
+       if (session_info != NULL) {
+               conn->session_info = copy_serverinfo(conn, session_info);
+               if (conn->session_info == NULL) {
+                       DEBUG(0, ("copy_serverinfo failed\n"));
+                       TALLOC_FREE(conn);
+                       return NT_STATUS_NO_MEMORY;
+               }
+               vfs_user = conn->session_info->unix_name;
+       } else {
+               /* use current authenticated user in absence of session_info */
+               vfs_user = get_current_username();
+       }
+
        set_conn_connectpath(conn, connpath);
 
        if (!smbd_vfs_init(conn)) {
                NTSTATUS status = map_nt_error_from_unix(errno);
                DEBUG(0,("create_conn_struct: smbd_vfs_init failed.\n"));
-               conn_free_internal(conn);
+               conn_free(conn);
                return status;
        }
 
+       /* this must be the first filesystem operation that we do */
+       if (SMB_VFS_CONNECT(conn, lp_servicename(snum), vfs_user) < 0) {
+               DEBUG(0,("VFS connect failed!\n"));
+               conn_free(conn);
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+
+       conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn, &conn->ts_res);
+
        /*
         * Windows seems to insist on doing trans2getdfsreferral() calls on
         * the IPC$ share as the anonymous user. If we try to chdir as that
         * user we will fail.... WTF ? JRA.
         */
 
+       oldcwd = vfs_GetWd(ctx, conn);
+       if (oldcwd == NULL) {
+               NTSTATUS status = map_nt_error_from_unix(errno);
+               DEBUG(3, ("vfs_GetWd failed: %s\n", strerror(errno)));
+               conn_free(conn);
+               return status;
+       }
+
        if (vfs_ChDir(conn,conn->connectpath) != 0) {
                NTSTATUS status = map_nt_error_from_unix(errno);
                DEBUG(3,("create_conn_struct: Can't ChDir to new conn path %s. "
                        "Error was %s\n",
                        conn->connectpath, strerror(errno) ));
-               conn_free_internal(conn);
+               conn_free(conn);
                return status;
        }
 
+       *pconn = conn;
+       *poldcwd = oldcwd;
+
        return NT_STATUS_OK;
 }
 
@@ -268,7 +342,7 @@ static NTSTATUS create_conn_struct(connection_struct *conn,
  server we're referring to understands posix paths.
  **********************************************************************/
 
-static BOOL parse_msdfs_symlink(TALLOC_CTX *ctx,
+static bool parse_msdfs_symlink(TALLOC_CTX *ctx,
                                const char *target,
                                struct referral **preflist,
                                int *refcount)
@@ -278,12 +352,13 @@ static BOOL parse_msdfs_symlink(TALLOC_CTX *ctx,
        char **alt_path = NULL;
        int count = 0, i;
        struct referral *reflist;
+       char *saveptr;
 
        temp = talloc_strdup(ctx, target);
        if (!temp) {
                return False;
        }
-       prot = strtok(temp,":");
+       prot = strtok_r(temp, ":", &saveptr);
        if (!prot) {
                DEBUG(0,("parse_msdfs_symlink: invalid path !\n"));
                return False;
@@ -296,7 +371,7 @@ static BOOL parse_msdfs_symlink(TALLOC_CTX *ctx,
 
        /* parse out the alternate paths */
        while((count<MAX_REFERRAL_COUNT) &&
-             ((alt_path[count] = strtok(NULL,",")) != NULL)) {
+             ((alt_path[count] = strtok_r(NULL, ",", &saveptr)) != NULL)) {
                count++;
        }
 
@@ -337,9 +412,10 @@ static BOOL parse_msdfs_symlink(TALLOC_CTX *ctx,
                reflist[i].ttl = REFERRAL_TTL;
                DEBUG(10, ("parse_msdfs_symlink: Created alt path: %s\n",
                                        reflist[i].alternate_path));
-               *refcount += 1;
        }
 
+       *refcount = count;
+
        TALLOC_FREE(alt_path);
        return True;
 }
@@ -349,17 +425,21 @@ static BOOL parse_msdfs_symlink(TALLOC_CTX *ctx,
  returns the target string from inside the link.
 **********************************************************************/
 
-static BOOL is_msdfs_link_internal(TALLOC_CTX *ctx,
+static bool is_msdfs_link_internal(TALLOC_CTX *ctx,
                        connection_struct *conn,
                        const char *path,
                        char **pp_link_target,
                        SMB_STRUCT_STAT *sbufp)
 {
-       SMB_STRUCT_STAT st;
        int referral_len = 0;
+#if defined(HAVE_BROKEN_READLINK)
+       char link_target_buf[PATH_MAX];
+#else
        char link_target_buf[7];
+#endif
        size_t bufsize = 0;
        char *link_target = NULL;
+       struct smb_filename smb_fname;
 
        if (pp_link_target) {
                bufsize = 1024;
@@ -373,21 +453,22 @@ static BOOL is_msdfs_link_internal(TALLOC_CTX *ctx,
                link_target = link_target_buf;
        }
 
-       if (sbufp == NULL) {
-               sbufp = &st;
-       }
+       ZERO_STRUCT(smb_fname);
+       smb_fname.base_name = discard_const_p(char, path);
 
-       if (SMB_VFS_LSTAT(conn, path, sbufp) != 0) {
+       if (SMB_VFS_LSTAT(conn, &smb_fname) != 0) {
                DEBUG(5,("is_msdfs_link_read_target: %s does not exist.\n",
                        path));
                goto err;
        }
-
-       if (!S_ISLNK(sbufp->st_mode)) {
+       if (!S_ISLNK(smb_fname.st.st_ex_mode)) {
                DEBUG(5,("is_msdfs_link_read_target: %s is not a link.\n",
                                        path));
                goto err;
        }
+       if (sbufp != NULL) {
+               *sbufp = smb_fname.st;
+       }
 
        referral_len = SMB_VFS_READLINK(conn, path, link_target, bufsize - 1);
        if (referral_len == -1) {
@@ -418,7 +499,7 @@ static BOOL is_msdfs_link_internal(TALLOC_CTX *ctx,
  Returns true if the unix path is a valid msdfs symlink.
 **********************************************************************/
 
-BOOL is_msdfs_link(connection_struct *conn,
+bool is_msdfs_link(connection_struct *conn,
                const char *path,
                SMB_STRUCT_STAT *sbufp)
 {
@@ -449,15 +530,14 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
                const char *dfspath, /* Incoming complete dfs path */
                const struct dfs_path *pdp, /* Parsed out
                                               server+share+extrapath. */
-               BOOL search_flag, /* Called from a findfirst ? */
+               bool search_flag, /* Called from a findfirst ? */
                int *consumedcntp,
                char **pp_targetpath)
 {
        char *p = NULL;
        char *q = NULL;
-       SMB_STRUCT_STAT sbuf;
        NTSTATUS status;
-       char *localpath = NULL;
+       struct smb_filename *smb_fname = NULL;
        char *canon_dfspath = NULL; /* Canonicalized dfs path. (only '/'
                                  components). */
 
@@ -471,25 +551,37 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
         * 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
-        * pstrcpy(localhost, dp->reqpath) on any code
+        * 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, search_flag, &localpath,
-                       NULL, &sbuf);
-       if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,
-                                       NT_STATUS_OBJECT_PATH_NOT_FOUND)) {
-               return status;
+       status = unix_convert(ctx, conn, pdp->reqpath, &smb_fname,
+                             search_flag ? UCF_ALWAYS_ALLOW_WCARD_LCOMP : 0);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               if (!NT_STATUS_EQUAL(status,
+                                    NT_STATUS_OBJECT_PATH_NOT_FOUND)) {
+                       return status;
+               }
+
+               /* Create an smb_fname to use below. */
+               status = create_synthetic_smb_fname(ctx, pdp->reqpath, NULL,
+                                                   NULL, &smb_fname);
+               if (!NT_STATUS_IS_OK(status)) {
+                       return status;
+               }
        }
 
        /* Optimization - check if we can redirect the whole path. */
 
-       if (is_msdfs_link_internal(ctx, conn, localpath, pp_targetpath, NULL)) {
+       if (is_msdfs_link_internal(ctx, conn, smb_fname->base_name,
+                                  pp_targetpath, NULL)) {
                if (search_flag) {
                        DEBUG(6,("dfs_path_lookup (FindFirst) No redirection "
                                 "for dfs link %s.\n", dfspath));
-                       return NT_STATUS_OK;
+                       status = NT_STATUS_OK;
+                       goto out;
                }
 
                DEBUG(6,("dfs_path_lookup: %s resolves to a "
@@ -499,7 +591,8 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
                if (consumedcntp) {
                        *consumedcntp = strlen(dfspath);
                }
-               return NT_STATUS_PATH_NOT_COVERED;
+               status = NT_STATUS_PATH_NOT_COVERED;
+               goto out;
        }
 
        /* Prepare to test only for '/' components in the given path,
@@ -508,7 +601,8 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
 
        canon_dfspath = talloc_strdup(ctx, dfspath);
        if (!canon_dfspath) {
-               return NT_STATUS_NO_MEMORY;
+               status = NT_STATUS_NO_MEMORY;
+               goto out;
        }
        if (!pdp->posix_path) {
                string_replace(canon_dfspath, '\\', '/');
@@ -530,7 +624,7 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
         * DFS path. If we hit a DFS link then we're done.
         */
 
-       p = strrchr_m(localpath, '/');
+       p = strrchr_m(smb_fname->base_name, '/');
        if (consumedcntp) {
                q = strrchr_m(canon_dfspath, '/');
        }
@@ -542,9 +636,11 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
                }
 
                if (is_msdfs_link_internal(ctx, conn,
-                                       localpath, pp_targetpath, NULL)) {
+                                          smb_fname->base_name, pp_targetpath,
+                                          NULL)) {
                        DEBUG(4, ("dfs_path_lookup: Redirecting %s because "
-                               "parent %s is dfs link\n", dfspath, localpath));
+                                 "parent %s is dfs link\n", dfspath,
+                                 smb_fname_str_dbg(smb_fname)));
 
                        if (consumedcntp) {
                                *consumedcntp = strlen(canon_dfspath);
@@ -554,11 +650,12 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
                                        *consumedcntp));
                        }
 
-                       return NT_STATUS_PATH_NOT_COVERED;
+                       status = NT_STATUS_PATH_NOT_COVERED;
+                       goto out;
                }
 
                /* Step back on the filesystem. */
-               p = strrchr_m(localpath, '/');
+               p = strrchr_m(smb_fname->base_name, '/');
 
                if (consumedcntp) {
                        /* And in the canonicalized dfs path. */
@@ -566,7 +663,10 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
                }
        }
 
-       return NT_STATUS_OK;
+       status = NT_STATUS_OK;
+ out:
+       TALLOC_FREE(smb_fname);
+       return status;
 }
 
 /*****************************************************************
@@ -587,9 +687,9 @@ static NTSTATUS dfs_path_lookup(TALLOC_CTX *ctx,
 static NTSTATUS dfs_redirect(TALLOC_CTX *ctx,
                        connection_struct *conn,
                        const char *path_in,
-                       BOOL search_wcard_flag,
+                       bool search_wcard_flag,
                        char **pp_path_out,
-                       BOOL *ppath_contains_wcard)
+                       bool *ppath_contains_wcard)
 {
        NTSTATUS status;
        struct dfs_path *pdp = TALLOC_P(ctx, struct dfs_path);
@@ -598,7 +698,7 @@ static NTSTATUS dfs_redirect(TALLOC_CTX *ctx,
                return NT_STATUS_NO_MEMORY;
        }
 
-       status = parse_dfs_path(path_in, search_wcard_flag, pdp,
+       status = parse_dfs_path(conn, path_in, search_wcard_flag, pdp,
                        ppath_contains_wcard);
        if (!NT_STATUS_IS_OK(status)) {
                TALLOC_FREE(pdp);
@@ -642,7 +742,7 @@ static NTSTATUS dfs_redirect(TALLOC_CTX *ctx,
        if (!( strequal(pdp->servicename, lp_servicename(SNUM(conn)))
                        || (strequal(pdp->servicename, HOMES_NAME)
                        && strequal(lp_servicename(SNUM(conn)),
-                               get_current_username()) )) ) {
+                               conn->session_info->sanitized_username) )) ) {
 
                /* The given sharename doesn't match this connection. */
                TALLOC_FREE(pdp);
@@ -687,7 +787,7 @@ static NTSTATUS self_ref(TALLOC_CTX *ctx,
                        const char *dfs_path,
                        struct junction_map *jucn,
                        int *consumedcntp,
-                       BOOL *self_referralp)
+                       bool *self_referralp)
 {
        struct referral *ref;
 
@@ -718,36 +818,27 @@ NTSTATUS get_referred_path(TALLOC_CTX *ctx,
                        const char *dfs_path,
                        struct junction_map *jucn,
                        int *consumedcntp,
-                       BOOL *self_referralp)
+                       bool *self_referralp)
 {
-       struct connection_struct conns;
-       struct connection_struct *conn = &conns;
+       struct connection_struct *conn;
        char *targetpath = NULL;
        int snum;
        NTSTATUS status = NT_STATUS_NOT_FOUND;
-       BOOL dummy;
+       bool dummy;
        struct dfs_path *pdp = TALLOC_P(ctx, struct dfs_path);
+       char *oldpath;
 
        if (!pdp) {
                return NT_STATUS_NO_MEMORY;
        }
 
-       ZERO_STRUCT(conns);
        *self_referralp = False;
 
-       status = parse_dfs_path(dfs_path, False, pdp, &dummy);
+       status = parse_dfs_path(NULL, dfs_path, False, pdp, &dummy);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }
 
-       /* Verify hostname in path */
-       if (!is_myname_or_ipaddr(pdp->hostname)) {
-               DEBUG(3, ("get_referred_path: Invalid hostname %s in path %s\n",
-                       pdp->hostname, dfs_path));
-               TALLOC_FREE(pdp);
-               return NT_STATUS_NOT_FOUND;
-       }
-
        jucn->service_name = talloc_strdup(ctx, pdp->servicename);
        jucn->volume_name = talloc_strdup(ctx, pdp->reqpath);
        if (!jucn->service_name || !jucn->volume_name) {
@@ -758,11 +849,13 @@ NTSTATUS get_referred_path(TALLOC_CTX *ctx,
        /* 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) {
+               char *service_name = NULL;
+               if ((snum = find_service(ctx, jucn->service_name, &service_name)) < 0) {
                        return NT_STATUS_NOT_FOUND;
                }
+               if (!service_name) {
+                       return NT_STATUS_NO_MEMORY;
+               }
                TALLOC_FREE(jucn->service_name);
                jucn->service_name = talloc_strdup(ctx, service_name);
                if (!jucn->service_name) {
@@ -844,7 +937,8 @@ NTSTATUS get_referred_path(TALLOC_CTX *ctx,
                return NT_STATUS_OK;
        }
 
-       status = create_conn_struct(conn, snum, lp_pathname(snum));
+       status = create_conn_struct(ctx, &conn, snum, lp_pathname(snum),
+                                   NULL, &oldpath);
        if (!NT_STATUS_IS_OK(status)) {
                TALLOC_FREE(pdp);
                return status;
@@ -859,9 +953,7 @@ NTSTATUS get_referred_path(TALLOC_CTX *ctx,
        if (!NT_STATUS_EQUAL(status, NT_STATUS_PATH_NOT_COVERED)) {
                DEBUG(3,("get_referred_path: No valid referrals for path %s\n",
                        dfs_path));
-               conn_free_internal(conn);
-               TALLOC_FREE(pdp);
-               return status;
+               goto err_exit;
        }
 
        /* We know this is a valid dfs link. Parse the targetpath. */
@@ -870,25 +962,27 @@ NTSTATUS get_referred_path(TALLOC_CTX *ctx,
                                &jucn->referral_count)) {
                DEBUG(3,("get_referred_path: failed to parse symlink "
                        "target %s\n", targetpath ));
-               conn_free_internal(conn);
-               TALLOC_FREE(pdp);
-               return NT_STATUS_NOT_FOUND;
+               status = NT_STATUS_NOT_FOUND;
+               goto err_exit;
        }
 
-       conn_free_internal(conn);
+       status = NT_STATUS_OK;
+ err_exit:
+       vfs_ChDir(conn, oldpath);
+       SMB_VFS_DISCONNECT(conn);
+       conn_free(conn);
        TALLOC_FREE(pdp);
-       return NT_STATUS_OK;
+       return status;
 }
 
 static int setup_ver2_dfs_referral(const char *pathname,
                                char **ppdata,
                                struct junction_map *junction,
-                               int consumedcnt,
-                               BOOL self_referral)
+                               bool self_referral)
 {
        char* pdata = *ppdata;
 
-       unsigned char uni_requestedpath[sizeof(pstring)];
+       smb_ucs2_t *uni_requestedpath = NULL;
        int uni_reqpathoffset1,uni_reqpathoffset2;
        int uni_curroffset;
        int requestedpathlen=0;
@@ -898,12 +992,15 @@ static int setup_ver2_dfs_referral(const char *pathname,
 
        DEBUG(10,("Setting up version2 referral\nRequested path:\n"));
 
-       requestedpathlen = rpcstr_push(uni_requestedpath,
-                                       pathname, sizeof(pstring),
-                                       STR_TERMINATE);
+       requestedpathlen = rpcstr_push_talloc(talloc_tos(),
+                                       &uni_requestedpath, pathname);
+       if (uni_requestedpath == NULL || requestedpathlen == 0) {
+               return -1;
+       }
 
        if (DEBUGLVL(10)) {
-               dump_data(0, uni_requestedpath,requestedpathlen);
+               dump_data(0, (unsigned char *)uni_requestedpath,
+                       requestedpathlen);
        }
 
        DEBUG(10,("ref count = %u\n",junction->referral_count));
@@ -945,7 +1042,8 @@ static int setup_ver2_dfs_referral(const char *pathname,
        memcpy(pdata+uni_reqpathoffset2,uni_requestedpath,requestedpathlen);
 
        /* create the header */
-       SSVAL(pdata,0,consumedcnt * 2); /* path consumed */
+       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) {
@@ -976,8 +1074,10 @@ static int setup_ver2_dfs_referral(const char *pathname,
                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,
-                                    sizeof(pstring), STR_UNICODE);
+               unilen = rpcstr_push(pdata+uni_curroffset,
+                                       ref->alternate_path,
+                                       reply_size - uni_curroffset,
+                                       STR_UNICODE);
 
                SSVAL(pdata,offset+20,uni_curroffset-offset);
 
@@ -992,12 +1092,11 @@ static int setup_ver2_dfs_referral(const char *pathname,
 static int setup_ver3_dfs_referral(const char *pathname,
                                char **ppdata,
                                struct junction_map *junction,
-                               int consumedcnt,
-                               BOOL self_referral)
+                               bool self_referral)
 {
        char *pdata = *ppdata;
 
-       unsigned char uni_reqpath[sizeof(pstring)];
+       smb_ucs2_t *uni_reqpath = NULL;
        int uni_reqpathoffset1, uni_reqpathoffset2;
        int uni_curroffset;
        int reply_size = 0;
@@ -1007,11 +1106,14 @@ static int setup_ver3_dfs_referral(const char *pathname,
 
        DEBUG(10,("setting up version3 referral\n"));
 
-       reqpathlen = rpcstr_push(uni_reqpath, pathname,
-                       sizeof(pstring), STR_TERMINATE);
+       reqpathlen = rpcstr_push_talloc(talloc_tos(), &uni_reqpath, pathname);
+       if (uni_reqpath == NULL || reqpathlen == 0) {
+               return -1;
+       }
 
        if (DEBUGLVL(10)) {
-               dump_data(0, uni_reqpath,reqpathlen);
+               dump_data(0, (unsigned char *)uni_reqpath,
+                       reqpathlen);
        }
 
        uni_reqpathoffset1 = REFERRAL_HEADER_SIZE +
@@ -1036,7 +1138,8 @@ static int setup_ver3_dfs_referral(const char *pathname,
        *ppdata = pdata;
 
        /* create the header */
-       SSVAL(pdata,0,consumedcnt * 2); /* path consumed */
+       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);
@@ -1069,8 +1172,8 @@ static int setup_ver3_dfs_referral(const char *pathname,
                SSVAL(pdata,offset+14,uni_reqpathoffset2-offset);
                /* copy referred path into current offset */
                unilen = rpcstr_push(pdata+uni_curroffset,ref->alternate_path,
-                                    sizeof(pstring),
-                                    STR_UNICODE | STR_TERMINATE);
+                                       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);
@@ -1095,7 +1198,7 @@ int setup_dfs_referral(connection_struct *orig_conn,
 {
        struct junction_map *junction = NULL;
        int consumedcnt = 0;
-       BOOL self_referral = False;
+       bool self_referral = False;
        int reply_size = 0;
        char *pathnamep = NULL;
        char *local_dfs_path = NULL;
@@ -1176,11 +1279,11 @@ int setup_dfs_referral(connection_struct *orig_conn,
        case 2:
                reply_size = setup_ver2_dfs_referral(pathnamep,
                                        ppdata, junction,
-                                       consumedcnt, self_referral);
+                                       self_referral);
                break;
        case 3:
                reply_size = setup_ver3_dfs_referral(pathnamep, ppdata,
-                                       junction, consumedcnt, self_referral);
+                                       junction, self_referral);
                break;
        default:
                DEBUG(0,("setup_dfs_referral: Invalid dfs referral "
@@ -1209,19 +1312,19 @@ int setup_dfs_referral(connection_struct *orig_conn,
  Creates a junction structure from a DFS pathname
 **********************************************************************/
 
-BOOL create_junction(TALLOC_CTX *ctx,
+bool create_junction(TALLOC_CTX *ctx,
                const char *dfs_path,
                struct junction_map *jucn)
 {
        int snum;
-       BOOL dummy;
+       bool dummy;
        struct dfs_path *pdp = TALLOC_P(ctx,struct dfs_path);
        NTSTATUS status;
 
        if (!pdp) {
                return False;
        }
-       status = parse_dfs_path(dfs_path, False, pdp, &dummy);
+       status = parse_dfs_path(NULL, dfs_path, False, pdp, &dummy);
        if (!NT_STATUS_IS_OK(status)) {
                return False;
        }
@@ -1260,50 +1363,53 @@ BOOL create_junction(TALLOC_CTX *ctx,
  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)
+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;
        }
-       if (!NT_STATUS_IS_OK(create_conn_struct(conn_out, snum,
-                                       lp_pathname(snum)))) {
+       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->mem_ctx,
+       *pp_path_out = talloc_asprintf(*conn_out,
                        "%s/%s",
                        lp_pathname(snum),
                        jucn->volume_name);
        if (!*pp_path_out) {
+               vfs_ChDir(*conn_out, *oldpath);
+               SMB_VFS_DISCONNECT(*conn_out);
+               conn_free(*conn_out);
                return False;
        }
        return True;
 }
 
-BOOL create_msdfs_link(const struct junction_map *jucn,
-               BOOL exists)
+bool create_msdfs_link(const struct junction_map *jucn)
 {
        char *path = NULL;
+       char *cwd;
        char *msdfs_link = NULL;
-       connection_struct conns;
-       connection_struct *conn = &conns;
+       connection_struct *conn;
        int i=0;
-       BOOL insert_comma = False;
-       BOOL ret = False;
+       bool insert_comma = False;
+       bool ret = False;
 
-       ZERO_STRUCT(conns);
-
-       if(!junction_to_local_path(jucn, &path, conn)) {
+       if(!junction_to_local_path(jucn, &path, &conn, &cwd)) {
                return False;
        }
 
        /* Form the msdfs_link contents */
-       msdfs_link = talloc_strdup(conn->mem_ctx, "msdfs:");
+       msdfs_link = talloc_strdup(conn, "msdfs:");
        if (!msdfs_link) {
                goto out;
        }
@@ -1339,43 +1445,71 @@ BOOL create_msdfs_link(const struct junction_map *jucn,
        DEBUG(5,("create_msdfs_link: Creating new msdfs link: %s -> %s\n",
                path, msdfs_link));
 
-       if(exists) {
-               if(SMB_VFS_UNLINK(conn,path)!=0) {
+       if(SMB_VFS_SYMLINK(conn, msdfs_link, path) < 0) {
+               if (errno == EEXIST) {
+                       struct smb_filename *smb_fname = NULL;
+                       NTSTATUS status;
+
+                       status = create_synthetic_smb_fname(talloc_tos(), path,
+                                                           NULL, NULL,
+                                                           &smb_fname);
+                       if (!NT_STATUS_IS_OK(status)) {
+                               errno = map_errno_from_nt_status(status);
+                               goto out;
+                       }
+
+                       if(SMB_VFS_UNLINK(conn, smb_fname)!=0) {
+                               TALLOC_FREE(smb_fname);
+                               goto out;
+                       }
+                       TALLOC_FREE(smb_fname);
+               }
+               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;
                }
        }
 
-       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:
-
-       conn_free_internal(conn);
+       vfs_ChDir(conn, cwd);
+       SMB_VFS_DISCONNECT(conn);
+       conn_free(conn);
        return ret;
 }
 
-BOOL remove_msdfs_link(const struct junction_map *jucn)
+bool remove_msdfs_link(const struct junction_map *jucn)
 {
        char *path = NULL;
-       connection_struct conns;
-       connection_struct *conn = &conns;
-       BOOL ret = False;
+       char *cwd;
+       connection_struct *conn;
+       bool ret = False;
+       struct smb_filename *smb_fname = NULL;
+       NTSTATUS status;
 
-       ZERO_STRUCT(conns);
+       if (!junction_to_local_path(jucn, &path, &conn, &cwd)) {
+               return false;
+       }
 
-       if( junction_to_local_path(jucn, &path, conn) ) {
-               if( SMB_VFS_UNLINK(conn, path) == 0 ) {
-                       ret = True;
-               }
+       status = create_synthetic_smb_fname(talloc_tos(), path,
+                                           NULL, NULL,
+                                           &smb_fname);
+       if (!NT_STATUS_IS_OK(status)) {
+               errno = map_errno_from_nt_status(status);
+               return false;
+       }
+
+       if( SMB_VFS_UNLINK(conn, smb_fname) == 0 ) {
+               ret = True;
        }
 
-       conn_free_internal(conn);
+       TALLOC_FREE(smb_fname);
+       vfs_ChDir(conn, cwd);
+       SMB_VFS_DISCONNECT(conn);
+       conn_free(conn);
        return ret;
 }
 
@@ -1387,12 +1521,13 @@ static int count_dfs_links(TALLOC_CTX *ctx, int snum)
 {
        size_t cnt = 0;
        SMB_STRUCT_DIR *dirp = NULL;
-       char *dname = NULL;
+       const char *dname = NULL;
+       char *talloced = NULL;
        const char *connect_path = lp_pathname(snum);
        const char *msdfs_proxy = lp_msdfs_proxy(snum);
-       connection_struct conn;
-
-       ZERO_STRUCT(conn);
+       connection_struct *conn;
+       NTSTATUS status;
+       char *cwd;
 
        if(*connect_path == '\0') {
                return 0;
@@ -1402,7 +1537,11 @@ static int count_dfs_links(TALLOC_CTX *ctx, int snum)
         * Fake up a connection struct for the VFS layer.
         */
 
-       if (!NT_STATUS_IS_OK(create_conn_struct(&conn, snum, connect_path))) {
+       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;
        }
 
@@ -1415,24 +1554,27 @@ static int count_dfs_links(TALLOC_CTX *ctx, int snum)
        }
 
        /* Now enumerate all dfs links */
-       dirp = SMB_VFS_OPENDIR(&conn, ".", NULL, 0);
+       dirp = SMB_VFS_OPENDIR(conn, ".", NULL, 0);
        if(!dirp) {
                goto out;
        }
 
-       while ((dname = vfs_readdirname(&conn, dirp)) != NULL) {
-               if (is_msdfs_link(&conn,
+       while ((dname = vfs_readdirname(conn, dirp, NULL, &talloced))
+              != NULL) {
+               if (is_msdfs_link(conn,
                                dname,
                                NULL)) {
                        cnt++;
                }
+               TALLOC_FREE(talloced);
        }
 
-       SMB_VFS_CLOSEDIR(&conn,dirp);
+       SMB_VFS_CLOSEDIR(conn,dirp);
 
 out:
-
-       conn_free_internal(&conn);
+       vfs_ChDir(conn, cwd);
+       SMB_VFS_DISCONNECT(conn);
+       conn_free(conn);
        return cnt;
 }
 
@@ -1446,14 +1588,15 @@ static int form_junctions(TALLOC_CTX *ctx,
 {
        size_t cnt = 0;
        SMB_STRUCT_DIR *dirp = NULL;
-       char *dname = NULL;
+       const char *dname = NULL;
+       char *talloced = 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;
+       connection_struct *conn;
        struct referral *ref = NULL;
-
-       ZERO_STRUCT(conn);
+       char *cwd;
+       NTSTATUS status;
 
        if (jn_remain == 0) {
                return 0;
@@ -1467,7 +1610,11 @@ static int form_junctions(TALLOC_CTX *ctx,
         * Fake up a connection struct for the VFS layer.
         */
 
-       if (!NT_STATUS_IS_OK(create_conn_struct(&conn, snum, connect_path))) {
+       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;
        }
 
@@ -1477,9 +1624,10 @@ static int form_junctions(TALLOC_CTX *ctx,
        */
        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) {
+       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);
@@ -1510,21 +1658,22 @@ static int form_junctions(TALLOC_CTX *ctx,
        }
 
        /* Now enumerate all dfs links */
-       dirp = SMB_VFS_OPENDIR(&conn, ".", NULL, 0);
+       dirp = SMB_VFS_OPENDIR(conn, ".", NULL, 0);
        if(!dirp) {
                goto out;
        }
 
-       while ((dname = vfs_readdirname(&conn, dirp)) != NULL) {
+       while ((dname = vfs_readdirname(conn, dirp, NULL, &talloced))
+              != NULL) {
                char *link_target = NULL;
                if (cnt >= jn_remain) {
-                       SMB_VFS_CLOSEDIR(&conn,dirp);
                        DEBUG(2, ("form_junctions: ran out of MSDFS "
                                "junction slots"));
+                       TALLOC_FREE(talloced);
                        goto out;
                }
                if (is_msdfs_link_internal(ctx,
-                                       &conn,
+                                       conn,
                                        dname, &link_target,
                                        NULL)) {
                        if (parse_msdfs_symlink(ctx,
@@ -1538,24 +1687,30 @@ static int form_junctions(TALLOC_CTX *ctx,
                                                                dname);
                                if (!jucn[cnt].service_name ||
                                                !jucn[cnt].volume_name) {
+                                       TALLOC_FREE(talloced);
                                        goto out;
                                }
+                               jucn[cnt].comment = "";
                                cnt++;
                        }
+                       TALLOC_FREE(link_target);
                }
+               TALLOC_FREE(talloced);
        }
 
 out:
 
        if (dirp) {
-               SMB_VFS_CLOSEDIR(&conn,dirp);
+               SMB_VFS_CLOSEDIR(conn,dirp);
        }
 
-       conn_free_internal(&conn);
+       vfs_ChDir(conn, cwd);
+       conn_free(conn);
        return cnt;
 }
 
-struct junction_map *enum_msdfs_links(TALLOC_CTX *ctx, size_t *p_num_jn)
+struct junction_map *enum_msdfs_links(struct smbd_server_connection *sconn,
+                                     TALLOC_CTX *ctx, size_t *p_num_jn)
 {
        struct junction_map *jn = NULL;
        int i=0;
@@ -1570,7 +1725,7 @@ struct junction_map *enum_msdfs_links(TALLOC_CTX *ctx, size_t *p_num_jn)
        /* Ensure all the usershares are loaded. */
        become_root();
        load_registry_shares();
-       sharecount = load_usershare_shares();
+       sharecount = load_usershare_shares(sconn);
        unbecome_root();
 
        for(i=0;i < sharecount;i++) {
@@ -1599,64 +1754,40 @@ struct junction_map *enum_msdfs_links(TALLOC_CTX *ctx, size_t *p_num_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.
+ Core function to resolve a dfs pathname possibly containing a wildcard.  If
+ ppath_contains_wcard != NULL, it will be set to true if a wildcard is
+ detected during dfs resolution.
 ******************************************************************************/
 
 NTSTATUS resolve_dfspath_wcard(TALLOC_CTX *ctx,
                                connection_struct *conn,
-                               BOOL dfs_pathnames,
+                               bool dfs_pathnames,
                                const char *name_in,
+                               bool allow_wcards,
                                char **pp_name_out,
-                               BOOL *ppath_contains_wcard)
+                               bool *ppath_contains_wcard)
 {
+       bool path_contains_wcard;
        NTSTATUS status = NT_STATUS_OK;
+
        if (dfs_pathnames) {
                status = dfs_redirect(ctx,
                                        conn,
                                        name_in,
-                                       True,
+                                       allow_wcards,
                                        pp_name_out,
-                                       ppath_contains_wcard);
+                                       &path_contains_wcard);
+
+               if (NT_STATUS_IS_OK(status) && ppath_contains_wcard != NULL) {
+                       *ppath_contains_wcard = path_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);
+               *pp_name_out = discard_const_p(char, name_in);
        }
        return status;
 }