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samba-mirror/source3/libsmb/clidfs.c

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/*
Unix SMB/CIFS implementation.
client connect/disconnect routines
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Gerald (Jerry) Carter 2004
Copyright (C) Jeremy Allison 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
/********************************************************************
Important point.
DFS paths are *always* of the form \server\share\<pathname> (the \ characters
are not C escaped here).
- but if we're using POSIX paths then <pathname> may contain
'/' separators, not '\\' separators. So cope with '\\' or '/'
as a separator when looking at the pathname part.... JRA.
********************************************************************/
struct client_connection {
struct client_connection *prev, *next;
struct cli_state *cli;
char *mount;
};
/* global state....globals reek! */
int max_protocol = PROTOCOL_NT1;
static struct cm_cred_struct {
char *username;
char *password;
bool got_pass;
bool use_kerberos;
bool fallback_after_kerberos;
int signing_state;
} cm_creds;
static void cm_set_password(const char *newpass);
static int port;
static int name_type = 0x20;
static bool have_ip;
static struct sockaddr_storage dest_ss;
static struct client_connection *connections;
static bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
struct cli_state *cli,
const char *sharename,
char **pp_newserver,
char **pp_newshare,
bool force_encrypt,
const char *username,
const char *password,
const char *domain);
/********************************************************************
Ensure a connection is encrypted.
********************************************************************/
NTSTATUS cli_cm_force_encryption(struct cli_state *c,
const char *username,
const char *password,
const char *domain,
const char *sharename)
{
NTSTATUS status = cli_force_encryption(c,
username,
password,
domain);
if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_SUPPORTED)) {
d_printf("Encryption required and "
"server that doesn't support "
"UNIX extensions - failing connect\n");
} else if (NT_STATUS_EQUAL(status,NT_STATUS_UNKNOWN_REVISION)) {
d_printf("Encryption required and "
"can't get UNIX CIFS extensions "
"version from server.\n");
} else if (NT_STATUS_EQUAL(status,NT_STATUS_UNSUPPORTED_COMPRESSION)) {
d_printf("Encryption required and "
"share %s doesn't support "
"encryption.\n", sharename);
} else if (!NT_STATUS_IS_OK(status)) {
d_printf("Encryption required and "
"setup failed with error %s.\n",
nt_errstr(status));
}
return status;
}
/********************************************************************
Return a connection to a server.
********************************************************************/
static struct cli_state *do_connect(TALLOC_CTX *ctx,
const char *server,
const char *share,
bool show_sessetup,
bool force_encrypt)
{
struct cli_state *c = NULL;
struct nmb_name called, calling;
const char *server_n;
struct sockaddr_storage ss;
char *servicename;
char *sharename;
char *newserver, *newshare;
const char *username;
const char *password;
NTSTATUS status;
/* make a copy so we don't modify the global string 'service' */
servicename = talloc_strdup(ctx,share);
if (!servicename) {
return NULL;
}
sharename = servicename;
if (*sharename == '\\') {
server = sharename+2;
sharename = strchr_m(server,'\\');
if (!sharename) {
return NULL;
}
*sharename = 0;
sharename++;
}
server_n = server;
zero_addr(&ss);
make_nmb_name(&calling, global_myname(), 0x0);
make_nmb_name(&called , server, name_type);
again:
zero_addr(&ss);
if (have_ip)
ss = dest_ss;
/* have to open a new connection */
if (!(c=cli_initialise()) || (cli_set_port(c, port) != port)) {
d_printf("Connection to %s failed\n", server_n);
if (c) {
cli_shutdown(c);
}
return NULL;
}
status = cli_connect(c, server_n, &ss);
if (!NT_STATUS_IS_OK(status)) {
d_printf("Connection to %s failed (Error %s)\n",
server_n,
nt_errstr(status));
cli_shutdown(c);
return NULL;
}
c->protocol = max_protocol;
c->use_kerberos = cm_creds.use_kerberos;
c->fallback_after_kerberos = cm_creds.fallback_after_kerberos;
cli_setup_signing_state(c, cm_creds.signing_state);
if (!cli_session_request(c, &calling, &called)) {
char *p;
d_printf("session request to %s failed (%s)\n",
called.name, cli_errstr(c));
cli_shutdown(c);
c = NULL;
if ((p=strchr_m(called.name, '.'))) {
*p = 0;
goto again;
}
if (strcmp(called.name, "*SMBSERVER")) {
make_nmb_name(&called , "*SMBSERVER", 0x20);
goto again;
}
return NULL;
}
DEBUG(4,(" session request ok\n"));
if (!cli_negprot(c)) {
d_printf("protocol negotiation failed\n");
cli_shutdown(c);
return NULL;
}
if (!cm_creds.got_pass && !cm_creds.use_kerberos) {
char *label = NULL;
char *pass;
label = talloc_asprintf(ctx, "Enter %s's password: ",
cm_creds.username);
pass = getpass(label);
if (pass) {
cm_set_password(pass);
}
TALLOC_FREE(label);
}
username = cm_creds.username ? cm_creds.username : "";
password = cm_creds.password ? cm_creds.password : "";
if (!NT_STATUS_IS_OK(cli_session_setup(c, username,
password, strlen(password),
password, strlen(password),
lp_workgroup()))) {
/* If a password was not supplied then
* try again with a null username. */
if (password[0] || !username[0] || cm_creds.use_kerberos ||
!NT_STATUS_IS_OK(cli_session_setup(c, "",
"", 0,
"", 0,
lp_workgroup()))) {
d_printf("session setup failed: %s\n", cli_errstr(c));
if (NT_STATUS_V(cli_nt_error(c)) ==
NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED))
d_printf("did you forget to run kinit?\n");
cli_shutdown(c);
return NULL;
}
d_printf("Anonymous login successful\n");
}
if ( show_sessetup ) {
if (*c->server_domain) {
DEBUG(0,("Domain=[%s] OS=[%s] Server=[%s]\n",
c->server_domain,c->server_os,c->server_type));
} else if (*c->server_os || *c->server_type) {
DEBUG(0,("OS=[%s] Server=[%s]\n",
c->server_os,c->server_type));
}
}
DEBUG(4,(" session setup ok\n"));
/* here's the fun part....to support 'msdfs proxy' shares
(on Samba or windows) we have to issues a TRANS_GET_DFS_REFERRAL
here before trying to connect to the original share.
check_dfs_proxy() will fail if it is a normal share. */
if ((c->capabilities & CAP_DFS) &&
cli_check_msdfs_proxy(ctx, c, sharename,
&newserver, &newshare,
force_encrypt,
username,
password,
lp_workgroup())) {
cli_shutdown(c);
return do_connect(ctx, newserver,
newshare, false, force_encrypt);
}
/* must be a normal share */
if (!cli_send_tconX(c, sharename, "?????",
password, strlen(password)+1)) {
d_printf("tree connect failed: %s\n", cli_errstr(c));
cli_shutdown(c);
return NULL;
}
if (force_encrypt) {
status = cli_cm_force_encryption(c,
username,
password,
lp_workgroup(),
sharename);
if (!NT_STATUS_IS_OK(status)) {
cli_shutdown(c);
return NULL;
}
}
DEBUG(4,(" tconx ok\n"));
return c;
}
/****************************************************************************
****************************************************************************/
static void cli_cm_set_mntpoint(struct cli_state *c, const char *mnt)
{
struct client_connection *p;
int i;
for (p=connections,i=0; p; p=p->next,i++) {
if (strequal(p->cli->desthost, c->desthost) &&
strequal(p->cli->share, c->share)) {
break;
}
}
if (p) {
char *name = clean_name(NULL, p->mount);
if (!name) {
return;
}
p->mount = talloc_strdup(p, name);
TALLOC_FREE(name);
}
}
/****************************************************************************
****************************************************************************/
const char *cli_cm_get_mntpoint(struct cli_state *c)
{
struct client_connection *p;
int i;
for (p=connections,i=0; p; p=p->next,i++) {
if (strequal(p->cli->desthost, c->desthost) &&
strequal(p->cli->share, c->share)) {
break;
}
}
if (p) {
return p->mount;
}
return NULL;
}
/********************************************************************
Add a new connection to the list
********************************************************************/
static struct cli_state *cli_cm_connect(TALLOC_CTX *ctx,
struct cli_state *referring_cli,
const char *server,
const char *share,
bool show_hdr,
bool force_encrypt)
{
struct client_connection *node;
/* NB This must be the null context here... JRA. */
node = TALLOC_ZERO_ARRAY(NULL, struct client_connection, 1);
if (!node) {
return NULL;
}
node->cli = do_connect(ctx, server, share, show_hdr, force_encrypt);
if ( !node->cli ) {
TALLOC_FREE( node );
return NULL;
}
DLIST_ADD( connections, node );
cli_cm_set_mntpoint(node->cli, "");
if (referring_cli && referring_cli->posix_capabilities) {
uint16 major, minor;
uint32 caplow, caphigh;
if (cli_unix_extensions_version(node->cli, &major,
&minor, &caplow, &caphigh)) {
cli_set_unix_extensions_capabilities(node->cli,
major, minor,
caplow, caphigh);
}
}
return node->cli;
}
/********************************************************************
Return a connection to a server.
********************************************************************/
static struct cli_state *cli_cm_find(const char *server, const char *share)
{
struct client_connection *p;
for (p=connections; p; p=p->next) {
if ( strequal(server, p->cli->desthost) &&
strequal(share,p->cli->share)) {
return p->cli;
}
}
return NULL;
}
/****************************************************************************
Open a client connection to a \\server\share. Set's the current *cli
global variable as a side-effect (but only if the connection is successful).
****************************************************************************/
struct cli_state *cli_cm_open(TALLOC_CTX *ctx,
struct cli_state *referring_cli,
const char *server,
const char *share,
bool show_hdr,
bool force_encrypt)
{
struct cli_state *c;
/* try to reuse an existing connection */
c = cli_cm_find(server, share);
if (!c) {
c = cli_cm_connect(ctx, referring_cli,
server, share, show_hdr, force_encrypt);
}
return c;
}
/****************************************************************************
****************************************************************************/
void cli_cm_shutdown(void)
{
struct client_connection *p, *x;
for (p=connections; p;) {
cli_shutdown(p->cli);
x = p;
p = p->next;
TALLOC_FREE(x);
}
connections = NULL;
return;
}
/****************************************************************************
****************************************************************************/
void cli_cm_display(void)
{
struct client_connection *p;
int i;
for ( p=connections,i=0; p; p=p->next,i++ ) {
d_printf("%d:\tserver=%s, share=%s\n",
i, p->cli->desthost, p->cli->share );
}
}
/****************************************************************************
****************************************************************************/
static void cm_set_password(const char *newpass)
{
SAFE_FREE(cm_creds.password);
cm_creds.password = SMB_STRDUP(newpass);
if (cm_creds.password) {
cm_creds.got_pass = true;
}
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_credentials(void)
{
SAFE_FREE(cm_creds.username);
cm_creds.username = SMB_STRDUP(get_cmdline_auth_info_username());
if (get_cmdline_auth_info_got_pass()) {
cm_set_password(get_cmdline_auth_info_password());
}
cm_creds.use_kerberos = get_cmdline_auth_info_use_kerberos();
cm_creds.fallback_after_kerberos = false;
cm_creds.signing_state = get_cmdline_auth_info_signing_state();
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_port(int port_number)
{
port = port_number;
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_dest_name_type(int type)
{
name_type = type;
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_signing_state(int state)
{
cm_creds.signing_state = state;
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_username(const char *username)
{
SAFE_FREE(cm_creds.username);
cm_creds.username = SMB_STRDUP(username);
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_password(const char *newpass)
{
SAFE_FREE(cm_creds.password);
cm_creds.password = SMB_STRDUP(newpass);
if (cm_creds.password) {
cm_creds.got_pass = true;
}
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_use_kerberos(void)
{
cm_creds.use_kerberos = true;
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_fallback_after_kerberos(void)
{
cm_creds.fallback_after_kerberos = true;
}
/****************************************************************************
****************************************************************************/
void cli_cm_set_dest_ss(struct sockaddr_storage *pss)
{
dest_ss = *pss;
have_ip = true;
}
/**********************************************************************
split a dfs path into the server, share name, and extrapath components
**********************************************************************/
static void split_dfs_path(TALLOC_CTX *ctx,
const char *nodepath,
char **pp_server,
char **pp_share,
char **pp_extrapath)
{
char *p, *q;
char *path;
*pp_server = NULL;
*pp_share = NULL;
*pp_extrapath = NULL;
path = talloc_strdup(ctx, nodepath);
if (!path) {
return;
}
if ( path[0] != '\\' ) {
return;
}
p = strchr_m( path + 1, '\\' );
if ( !p ) {
return;
}
*p = '\0';
p++;
/* Look for any extra/deep path */
q = strchr_m(p, '\\');
if (q != NULL) {
*q = '\0';
q++;
*pp_extrapath = talloc_strdup(ctx, q);
} else {
*pp_extrapath = talloc_strdup(ctx, "");
}
*pp_share = talloc_strdup(ctx, p);
*pp_server = talloc_strdup(ctx, &path[1]);
}
/****************************************************************************
Return the original path truncated at the directory component before
the first wildcard character. Trust the caller to provide a NULL
terminated string
****************************************************************************/
static char *clean_path(TALLOC_CTX *ctx, const char *path)
{
size_t len;
char *p1, *p2, *p;
char *path_out;
/* No absolute paths. */
while (IS_DIRECTORY_SEP(*path)) {
path++;
}
path_out = talloc_strdup(ctx, path);
if (!path_out) {
return NULL;
}
p1 = strchr_m(path_out, '*');
p2 = strchr_m(path_out, '?');
if (p1 || p2) {
if (p1 && p2) {
p = MIN(p1,p2);
} else if (!p1) {
p = p2;
} else {
p = p1;
}
*p = '\0';
/* Now go back to the start of this component. */
p1 = strrchr_m(path_out, '/');
p2 = strrchr_m(path_out, '\\');
p = MAX(p1,p2);
if (p) {
*p = '\0';
}
}
/* Strip any trailing separator */
len = strlen(path_out);
if ( (len > 0) && IS_DIRECTORY_SEP(path_out[len-1])) {
path_out[len-1] = '\0';
}
return path_out;
}
/****************************************************************************
****************************************************************************/
static char *cli_dfs_make_full_path(TALLOC_CTX *ctx,
struct cli_state *cli,
const char *dir)
{
/* Ensure the extrapath doesn't start with a separator. */
while (IS_DIRECTORY_SEP(*dir)) {
dir++;
}
return talloc_asprintf(ctx, "\\%s\\%s\\%s",
cli->desthost, cli->share, dir);
}
/********************************************************************
check for dfs referral
********************************************************************/
static bool cli_dfs_check_error( struct cli_state *cli, NTSTATUS status )
{
uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
/* only deal with DS when we negotiated NT_STATUS codes and UNICODE */
if (!((flgs2&FLAGS2_32_BIT_ERROR_CODES) &&
(flgs2&FLAGS2_UNICODE_STRINGS)))
return false;
if (NT_STATUS_EQUAL(status, NT_STATUS(IVAL(cli->inbuf,smb_rcls))))
return true;
return false;
}
/********************************************************************
Get the dfs referral link.
********************************************************************/
bool cli_dfs_get_referral(TALLOC_CTX *ctx,
struct cli_state *cli,
const char *path,
CLIENT_DFS_REFERRAL**refs,
size_t *num_refs,
uint16 *consumed)
{
unsigned int data_len = 0;
unsigned int param_len = 0;
uint16 setup = TRANSACT2_GET_DFS_REFERRAL;
char *param;
char *rparam=NULL, *rdata=NULL;
char *p;
char *endp;
size_t pathlen = 2*(strlen(path)+1);
uint16 num_referrals;
CLIENT_DFS_REFERRAL *referrals = NULL;
bool ret = false;
*num_refs = 0;
*refs = NULL;
param = SMB_MALLOC_ARRAY(char, 2+pathlen+2);
if (!param) {
return false;
}
SSVAL(param, 0, 0x03); /* max referral level */
p = &param[2];
p += clistr_push(cli, p, path, pathlen, STR_TERMINATE);
param_len = PTR_DIFF(p, param);
if (!cli_send_trans(cli, SMBtrans2,
NULL, /* name */
-1, 0, /* fid, flags */
&setup, 1, 0, /* setup, length, max */
param, param_len, 2, /* param, length, max */
NULL, 0, cli->max_xmit /* data, length, max */
)) {
SAFE_FREE(param);
return false;
}
SAFE_FREE(param);
if (!cli_receive_trans(cli, SMBtrans2,
&rparam, &param_len,
&rdata, &data_len)) {
return false;
}
if (data_len < 4) {
goto out;
}
endp = rdata + data_len;
*consumed = SVAL(rdata, 0);
num_referrals = SVAL(rdata, 2);
if (num_referrals != 0) {
uint16 ref_version;
uint16 ref_size;
int i;
uint16 node_offset;
referrals = TALLOC_ARRAY(ctx, CLIENT_DFS_REFERRAL,
num_referrals);
if (!referrals) {
goto out;
}
/* start at the referrals array */
p = rdata+8;
for (i=0; i<num_referrals && p < endp; i++) {
if (p + 18 > endp) {
goto out;
}
ref_version = SVAL(p, 0);
ref_size = SVAL(p, 2);
node_offset = SVAL(p, 16);
if (ref_version != 3) {
p += ref_size;
continue;
}
referrals[i].proximity = SVAL(p, 8);
referrals[i].ttl = SVAL(p, 10);
if (p + node_offset > endp) {
goto out;
}
clistr_pull_talloc(ctx, cli, &referrals[i].dfspath,
p+node_offset, -1,
STR_TERMINATE|STR_UNICODE );
if (!referrals[i].dfspath) {
goto out;
}
p += ref_size;
}
if (i < num_referrals) {
goto out;
}
}
ret = true;
*num_refs = num_referrals;
*refs = referrals;
out:
SAFE_FREE(rdata);
SAFE_FREE(rparam);
return ret;
}
/********************************************************************
********************************************************************/
bool cli_resolve_path(TALLOC_CTX *ctx,
const char *mountpt,
struct cli_state *rootcli,
const char *path,
struct cli_state **targetcli,
char **pp_targetpath)
{
CLIENT_DFS_REFERRAL *refs = NULL;
size_t num_refs = 0;
uint16 consumed;
struct cli_state *cli_ipc = NULL;
char *dfs_path = NULL;
char *cleanpath = NULL;
char *extrapath = NULL;
int pathlen;
char *server = NULL;
char *share = NULL;
struct cli_state *newcli = NULL;
char *newpath = NULL;
char *newmount = NULL;
char *ppath = NULL;
SMB_STRUCT_STAT sbuf;
uint32 attributes;
if ( !rootcli || !path || !targetcli ) {
return false;
}
/* Don't do anything if this is not a DFS root. */
if ( !rootcli->dfsroot) {
*targetcli = rootcli;
*pp_targetpath = talloc_strdup(ctx, path);
if (!*pp_targetpath) {
return false;
}
return true;
}
*targetcli = NULL;
/* Send a trans2_query_path_info to check for a referral. */
cleanpath = clean_path(ctx, path);
if (!cleanpath) {
return false;
}
dfs_path = cli_dfs_make_full_path(ctx, rootcli, cleanpath);
if (!dfs_path) {
return false;
}
if (cli_qpathinfo_basic( rootcli, dfs_path, &sbuf, &attributes)) {
/* This is an ordinary path, just return it. */
*targetcli = rootcli;
*pp_targetpath = talloc_strdup(ctx, path);
if (!*pp_targetpath) {
return false;
}
goto done;
}
/* Special case where client asked for a path that does not exist */
if (cli_dfs_check_error(rootcli, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
*targetcli = rootcli;
*pp_targetpath = talloc_strdup(ctx, path);
if (!*pp_targetpath) {
return false;
}
goto done;
}
/* We got an error, check for DFS referral. */
if (!cli_dfs_check_error(rootcli, NT_STATUS_PATH_NOT_COVERED)) {
return false;
}
/* Check for the referral. */
if (!(cli_ipc = cli_cm_open(ctx, rootcli,
rootcli->desthost,
"IPC$", false,
(rootcli->trans_enc_state != NULL)))) {
return false;
}
if (!cli_dfs_get_referral(ctx, cli_ipc, dfs_path, &refs,
&num_refs, &consumed) || !num_refs) {
return false;
}
/* Just store the first referral for now. */
if (!refs[0].dfspath) {
return false;
}
split_dfs_path(ctx, refs[0].dfspath, &server, &share, &extrapath );
if (!server || !share) {
return false;
}
/* Make sure to recreate the original string including any wildcards. */
dfs_path = cli_dfs_make_full_path(ctx, rootcli, path);
if (!dfs_path) {
return false;
}
pathlen = strlen(dfs_path)*2;
consumed = MIN(pathlen, consumed);
*pp_targetpath = talloc_strdup(ctx, &dfs_path[consumed/2]);
if (!*pp_targetpath) {
return false;
}
dfs_path[consumed/2] = '\0';
/*
* *pp_targetpath is now the unconsumed part of the path.
* dfs_path is now the consumed part of the path
* (in \server\share\path format).
*/
/* Open the connection to the target server & share */
if ((*targetcli = cli_cm_open(ctx, rootcli,
server,
share,
false,
(rootcli->trans_enc_state != NULL))) == NULL) {
d_printf("Unable to follow dfs referral [\\%s\\%s]\n",
server, share );
return false;
}
if (extrapath && strlen(extrapath) > 0) {
*pp_targetpath = talloc_asprintf(ctx,
"%s%s",
extrapath,
*pp_targetpath);
if (!*pp_targetpath) {
return false;
}
}
/* parse out the consumed mount path */
/* trim off the \server\share\ */
ppath = dfs_path;
if (*ppath != '\\') {
d_printf("cli_resolve_path: "
"dfs_path (%s) not in correct format.\n",
dfs_path );
return false;
}
ppath++; /* Now pointing at start of server name. */
if ((ppath = strchr_m( dfs_path, '\\' )) == NULL) {
return false;
}
ppath++; /* Now pointing at start of share name. */
if ((ppath = strchr_m( ppath+1, '\\' )) == NULL) {
return false;
}
ppath++; /* Now pointing at path component. */
newmount = talloc_asprintf(ctx, "%s\\%s", mountpt, ppath );
if (!newmount) {
return false;
}
cli_cm_set_mntpoint(*targetcli, newmount);
/* Check for another dfs referral, note that we are not
checking for loops here. */
if (!strequal(*pp_targetpath, "\\") && !strequal(*pp_targetpath, "/")) {
if (cli_resolve_path(ctx,
newmount,
*targetcli,
*pp_targetpath,
&newcli,
&newpath)) {
/*
* When cli_resolve_path returns true here it's always
* returning the complete path in newpath, so we're done
* here.
*/
*targetcli = newcli;
*pp_targetpath = newpath;
return true;
}
}
done:
/* If returning true ensure we return a dfs root full path. */
if ((*targetcli)->dfsroot) {
dfs_path = talloc_strdup(ctx, *pp_targetpath);
if (!dfs_path) {
return false;
}
*pp_targetpath = cli_dfs_make_full_path(ctx, *targetcli, dfs_path);
}
return true;
}
/********************************************************************
********************************************************************/
static bool cli_check_msdfs_proxy(TALLOC_CTX *ctx,
struct cli_state *cli,
const char *sharename,
char **pp_newserver,
char **pp_newshare,
bool force_encrypt,
const char *username,
const char *password,
const char *domain)
{
CLIENT_DFS_REFERRAL *refs = NULL;
size_t num_refs = 0;
uint16 consumed;
char *fullpath = NULL;
bool res;
uint16 cnum;
char *newextrapath = NULL;
if (!cli || !sharename) {
return false;
}
cnum = cli->cnum;
/* special case. never check for a referral on the IPC$ share */
if (strequal(sharename, "IPC$")) {
return false;
}
/* send a trans2_query_path_info to check for a referral */
fullpath = talloc_asprintf(ctx, "\\%s\\%s", cli->desthost, sharename );
if (!fullpath) {
return false;
}
/* check for the referral */
if (!cli_send_tconX(cli, "IPC$", "IPC", NULL, 0)) {
return false;
}
if (force_encrypt) {
NTSTATUS status = cli_cm_force_encryption(cli,
username,
password,
lp_workgroup(),
"IPC$");
if (!NT_STATUS_IS_OK(status)) {
return false;
}
}
res = cli_dfs_get_referral(ctx, cli, fullpath, &refs, &num_refs, &consumed);
if (!cli_tdis(cli)) {
return false;
}
cli->cnum = cnum;
if (!res || !num_refs) {
return false;
}
if (!refs[0].dfspath) {
return false;
}
split_dfs_path(ctx, refs[0].dfspath, pp_newserver,
pp_newshare, &newextrapath );
if ((*pp_newserver == NULL) || (*pp_newshare == NULL)) {
return false;
}
/* check that this is not a self-referral */
if (strequal(cli->desthost, *pp_newserver) &&
strequal(sharename, *pp_newshare)) {
return false;
}
return true;
}