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samba-mirror/libcli/smb/smb2cli_tcon.c
Stefan Metzmacher 26ff9f3487 libcli/smb: call smb2cli_validate_negotiate_info*() after each authenticated tcon
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
2014-09-30 23:35:08 +02:00

339 lines
8.1 KiB
C

/*
Unix SMB/CIFS implementation.
smb2 lib
Copyright (C) Volker Lendecke 2011
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 "system/network.h"
#include "../lib/util/tevent_ntstatus.h"
#include "../libcli/smb/smb_common.h"
#include "../libcli/smb/smbXcli_base.h"
struct smb2cli_tcon_state {
struct tevent_context *ev;
struct smbXcli_conn *conn;
uint32_t timeout_msec;
struct smbXcli_session *session;
struct smbXcli_tcon *tcon;
uint8_t fixed[8];
uint8_t dyn_pad[1];
};
static void smb2cli_tcon_done(struct tevent_req *subreq);
struct tevent_req *smb2cli_tcon_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint16_t flags,
const char *unc)
{
struct tevent_req *req, *subreq;
struct smb2cli_tcon_state *state;
uint8_t *fixed;
uint8_t *dyn;
size_t dyn_len;
uint32_t additional_flags = 0;
uint32_t clear_flags = 0;
req = tevent_req_create(mem_ctx, &state, struct smb2cli_tcon_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->conn = conn;
state->timeout_msec = timeout_msec;
state->session = session;
state->tcon = tcon;
if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
unc, strlen(unc),
&dyn, &dyn_len)) {
tevent_req_oom(req);
return tevent_req_post(req, ev);
}
if (strlen(unc) == 0) {
TALLOC_FREE(dyn);
dyn_len = 0;
}
fixed = state->fixed;
SSVAL(fixed, 0, 9);
SSVAL(fixed, 4, SMB2_HDR_BODY + 8);
SSVAL(fixed, 6, dyn_len);
if (dyn_len == 0) {
dyn = state->dyn_pad;
dyn_len = sizeof(state->dyn_pad);
}
if (smbXcli_session_is_authenticated(state->session)) {
additional_flags |= SMB2_HDR_FLAG_SIGNED;
}
subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_TCON,
additional_flags, clear_flags,
timeout_msec,
NULL, /* tcon */
session,
state->fixed, sizeof(state->fixed),
dyn, dyn_len,
0); /* max_dyn_len */
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, smb2cli_tcon_done, req);
return req;
}
static void smb2cli_tcon_validate(struct tevent_req *subreq);
static void smb2cli_tcon_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct smb2cli_tcon_state *state = tevent_req_data(
req, struct smb2cli_tcon_state);
NTSTATUS status;
struct iovec *iov;
uint8_t *body;
uint32_t tcon_id;
uint8_t share_type;
uint32_t share_flags;
uint32_t share_capabilities;
uint32_t maximal_access;
static const struct smb2cli_req_expected_response expected[] = {
{
.status = NT_STATUS_OK,
.body_size = 0x10
}
};
status = smb2cli_req_recv(subreq, state, &iov,
expected, ARRAY_SIZE(expected));
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
tcon_id = IVAL(iov[0].iov_base, SMB2_HDR_TID);
body = (uint8_t *)iov[1].iov_base;
share_type = CVAL(body, 0x02);
share_flags = IVAL(body, 0x04);
share_capabilities = IVAL(body, 0x08);
maximal_access = IVAL(body, 0x0C);
smb2cli_tcon_set_values(state->tcon,
state->session,
tcon_id,
share_type,
share_flags,
share_capabilities,
maximal_access);
if (!smbXcli_session_is_authenticated(state->session)) {
tevent_req_done(req);
return;
}
subreq = smb2cli_validate_negotiate_info_send(state, state->ev,
state->conn,
state->timeout_msec,
state->session,
state->tcon);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, smb2cli_tcon_validate, req);
}
static void smb2cli_tcon_validate(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct smb2cli_tcon_state *state = tevent_req_data(
req, struct smb2cli_tcon_state);
NTSTATUS status;
status = smb2cli_validate_negotiate_info_recv(subreq);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
smb2cli_tcon_set_values(state->tcon, NULL,
UINT32_MAX, 0, 0, 0, 0);
tevent_req_nterror(req, status);
return;
}
tevent_req_done(req);
}
NTSTATUS smb2cli_tcon_recv(struct tevent_req *req)
{
return tevent_req_simple_recv_ntstatus(req);
}
NTSTATUS smb2cli_tcon(struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint16_t flags,
const char *unc)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
if (smbXcli_conn_has_async_calls(conn)) {
/*
* Can't use sync call while an async call is in flight
*/
status = NT_STATUS_INVALID_PARAMETER;
goto fail;
}
ev = samba_tevent_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = smb2cli_tcon_send(frame, ev, conn,
timeout_msec, session, tcon,
flags, unc);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = smb2cli_tcon_recv(req);
fail:
TALLOC_FREE(frame);
return status;
}
struct smb2cli_tdis_state {
struct smbXcli_tcon *tcon;
uint8_t fixed[4];
};
static void smb2cli_tdis_done(struct tevent_req *subreq);
struct tevent_req *smb2cli_tdis_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon)
{
struct tevent_req *req, *subreq;
struct smb2cli_tdis_state *state;
req = tevent_req_create(mem_ctx, &state,
struct smb2cli_tdis_state);
if (req == NULL) {
return NULL;
}
state->tcon = tcon;
SSVAL(state->fixed, 0, 4);
subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_TDIS,
0, 0, /* flags */
timeout_msec,
tcon, session,
state->fixed, sizeof(state->fixed),
NULL, 0, /* dyn* */
0); /* max_dyn_len */
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
return req;
}
static void smb2cli_tdis_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smb2cli_tdis_state *state =
tevent_req_data(req,
struct smb2cli_tdis_state);
NTSTATUS status;
static const struct smb2cli_req_expected_response expected[] = {
{
.status = NT_STATUS_OK,
.body_size = 0x04
}
};
status = smb2cli_req_recv(subreq, NULL, NULL,
expected, ARRAY_SIZE(expected));
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
smb2cli_tcon_set_values(state->tcon, NULL,
UINT32_MAX, 0, 0, 0, 0);
tevent_req_done(req);
}
NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
{
return tevent_req_simple_recv_ntstatus(req);
}
NTSTATUS smb2cli_tdis(struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
if (smbXcli_conn_has_async_calls(conn)) {
/*
* Can't use sync call while an async call is in flight
*/
status = NT_STATUS_INVALID_PARAMETER;
goto fail;
}
ev = samba_tevent_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = smb2cli_tdis_send(frame, ev, conn,
timeout_msec, session, tcon);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = smb2cli_tdis_recv(req);
fail:
TALLOC_FREE(frame);
return status;
}