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samba-mirror/source4/libcli/smb2/connect.c

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/*
Unix SMB/CIFS implementation.
SMB2 composite connection setup
Copyright (C) Andrew Tridgell 2005
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"
#include <tevent.h>
#include "lib/util/tevent_ntstatus.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/raw/raw_proto.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "libcli/composite/composite.h"
#include "libcli/resolve/resolve.h"
#include "param/param.h"
#include "auth/credentials/credentials.h"
#include "../libcli/smb/smbXcli_base.h"
struct smb2_connect_state {
struct tevent_context *ev;
struct cli_credentials *credentials;
uint64_t previous_session_id;
struct resolve_context *resolve_ctx;
const char *host;
const char *share;
const char *unc;
const char **ports;
const char *socket_options;
struct nbt_name calling, called;
struct gensec_settings *gensec_settings;
struct smbcli_options options;
struct smb2_transport *transport;
struct smb2_session *session;
struct smb2_tree *tree;
};
static void smb2_connect_socket_done(struct composite_context *creq);
/*
a composite function that does a full negprot/sesssetup/tcon, returning
a connected smb2_tree
*/
struct tevent_req *smb2_connect_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
const char *host,
const char **ports,
const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
uint64_t previous_session_id,
const struct smbcli_options *options,
const char *socket_options,
struct gensec_settings *gensec_settings)
{
struct tevent_req *req;
struct smb2_connect_state *state;
struct composite_context *creq;
static const char *default_ports[] = { "445", "139", NULL };
req = tevent_req_create(mem_ctx, &state,
struct smb2_connect_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->credentials = credentials;
state->previous_session_id = previous_session_id;
state->options = *options;
state->host = host;
state->ports = ports;
state->share = share;
state->resolve_ctx = resolve_ctx;
state->socket_options = socket_options;
state->gensec_settings = gensec_settings;
if (state->ports == NULL) {
state->ports = default_ports;
}
make_nbt_name_client(&state->calling,
cli_credentials_get_workstation(credentials));
nbt_choose_called_name(state, &state->called,
host, NBT_NAME_SERVER);
state->unc = talloc_asprintf(state, "\\\\%s\\%s",
state->host, state->share);
if (tevent_req_nomem(state->unc, req)) {
return tevent_req_post(req, ev);
}
creq = smbcli_sock_connect_send(state, NULL, state->ports,
state->host, state->resolve_ctx,
state->ev, state->socket_options,
&state->calling,
&state->called);
if (tevent_req_nomem(creq, req)) {
return tevent_req_post(req, ev);
}
creq->async.fn = smb2_connect_socket_done;
creq->async.private_data = req;
return req;
}
static void smb2_connect_negprot_done(struct tevent_req *subreq);
static void smb2_connect_socket_done(struct composite_context *creq)
{
struct tevent_req *req =
talloc_get_type_abort(creq->async.private_data,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
struct smbcli_socket *sock;
struct tevent_req *subreq;
NTSTATUS status;
uint32_t timeout_msec;
enum protocol_types min_protocol;
status = smbcli_sock_connect_recv(creq, state, &sock);
if (tevent_req_nterror(req, status)) {
return;
}
state->transport = smb2_transport_init(sock, state, &state->options);
if (tevent_req_nomem(state->transport, req)) {
return;
}
timeout_msec = state->transport->options.request_timeout * 1000;
min_protocol = state->transport->options.min_protocol;
if (min_protocol < PROTOCOL_SMB2_02) {
min_protocol = PROTOCOL_SMB2_02;
}
subreq = smbXcli_negprot_send(state, state->ev,
state->transport->conn, timeout_msec,
min_protocol,
state->transport->options.max_protocol);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, smb2_connect_negprot_done, req);
}
static void smb2_connect_session_done(struct tevent_req *subreq);
static void smb2_connect_negprot_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
struct smb2_transport *transport = state->transport;
NTSTATUS status;
status = smbXcli_negprot_recv(subreq);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
/* This is a hack... */
smb2cli_conn_set_max_credits(transport->conn, 30);
state->session = smb2_session_init(transport, state->gensec_settings, state);
if (tevent_req_nomem(state->session, req)) {
return;
}
subreq = smb2_session_setup_spnego_send(state, state->ev,
state->session,
state->credentials,
state->previous_session_id);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, smb2_connect_session_done, req);
}
static void smb2_connect_tcon_done(struct tevent_req *subreq);
static void smb2_connect_session_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
NTSTATUS status;
uint32_t timeout_msec;
status = smb2_session_setup_spnego_recv(subreq);
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
state->tree = smb2_tree_init(state->session, state, true);
if (tevent_req_nomem(state->tree, req)) {
return;
}
timeout_msec = state->transport->options.request_timeout * 1000;
subreq = smb2cli_tcon_send(state, state->ev,
state->transport->conn,
timeout_msec,
state->session->smbXcli,
state->tree->smbXcli,
0, /* flags */
state->unc);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, smb2_connect_tcon_done, req);
}
static void smb2_connect_tcon_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
NTSTATUS status;
status = smb2cli_tcon_recv(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
tevent_req_done(req);
}
NTSTATUS smb2_connect_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
struct smb2_tree **tree)
{
struct smb2_connect_state *state =
tevent_req_data(req,
struct smb2_connect_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*tree = talloc_move(mem_ctx, &state->tree);
tevent_req_received(req);
return NT_STATUS_OK;
}
/*
sync version of smb2_connect
*/
NTSTATUS smb2_connect_ext(TALLOC_CTX *mem_ctx,
const char *host,
const char **ports,
const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
uint64_t previous_session_id,
struct smb2_tree **tree,
struct tevent_context *ev,
const struct smbcli_options *options,
const char *socket_options,
struct gensec_settings *gensec_settings)
{
struct tevent_req *subreq;
NTSTATUS status;
bool ok;
TALLOC_CTX *frame = talloc_stackframe();
if (frame == NULL) {
return NT_STATUS_NO_MEMORY;
}
subreq = smb2_connect_send(frame,
ev,
host,
ports,
share,
resolve_ctx,
credentials,
previous_session_id,
options,
socket_options,
gensec_settings);
if (subreq == NULL) {
TALLOC_FREE(frame);
return NT_STATUS_NO_MEMORY;
}
ok = tevent_req_poll(subreq, ev);
if (!ok) {
status = map_nt_error_from_unix_common(errno);
TALLOC_FREE(frame);
return status;
}
status = smb2_connect_recv(subreq, mem_ctx, tree);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(frame);
return status;
}
TALLOC_FREE(frame);
return NT_STATUS_OK;
}
NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
const char *host,
const char **ports,
const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
struct smb2_tree **tree,
struct tevent_context *ev,
struct smbcli_options *options,
const char *socket_options,
struct gensec_settings *gensec_settings)
{
NTSTATUS status;
status = smb2_connect_ext(mem_ctx, host, ports, share, resolve_ctx,
credentials,
0, /* previous_session_id */
tree, ev, options, socket_options,
gensec_settings);
return status;
}