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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 "libcli/raw/libcliraw.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"
struct smb2_connect_state {
struct cli_credentials *credentials;
struct resolve_context *resolve_ctx;
const char *host;
const char *share;
struct smb2_negprot negprot;
struct smb2_tree_connect tcon;
struct smb2_session *session;
struct smb2_tree *tree;
};
/*
continue after tcon reply
*/
static void continue_tcon(struct smb2_request *req)
{
struct composite_context *c = talloc_get_type(req->async.private,
struct composite_context);
struct smb2_connect_state *state = talloc_get_type(c->private_data,
struct smb2_connect_state);
c->status = smb2_tree_connect_recv(req, &state->tcon);
if (!composite_is_ok(c)) return;
state->tree->tid = state->tcon.out.tid;
composite_done(c);
}
/*
continue after a session setup
*/
static void continue_session(struct composite_context *creq)
{
struct composite_context *c = talloc_get_type(creq->async.private_data,
struct composite_context);
struct smb2_connect_state *state = talloc_get_type(c->private_data,
struct smb2_connect_state);
struct smb2_request *req;
c->status = smb2_session_setup_spnego_recv(creq);
if (!composite_is_ok(c)) return;
state->tree = smb2_tree_init(state->session, state, true);
if (composite_nomem(state->tree, c)) return;
state->tcon.in.unknown1 = 0x09;
state->tcon.in.path = talloc_asprintf(state, "\\\\%s\\%s",
state->host, state->share);
if (composite_nomem(state->tcon.in.path, c)) return;
req = smb2_tree_connect_send(state->tree, &state->tcon);
if (composite_nomem(req, c)) return;
req->async.fn = continue_tcon;
req->async.private = c;
}
/*
continue after negprot reply
*/
static void continue_negprot(struct smb2_request *req)
{
struct composite_context *c = talloc_get_type(req->async.private,
struct composite_context);
struct smb2_connect_state *state = talloc_get_type(c->private_data,
struct smb2_connect_state);
struct smb2_transport *transport = req->transport;
struct composite_context *creq;
c->status = smb2_negprot_recv(req, c, &state->negprot);
if (!composite_is_ok(c)) return;
state->session = smb2_session_init(transport, global_loadparm, state, true);
if (composite_nomem(state->session, c)) return;
creq = smb2_session_setup_spnego_send(state->session, state->credentials);
composite_continue(c, creq, continue_session, c);
}
/*
continue after a socket connect completes
*/
static void continue_socket(struct composite_context *creq)
{
struct composite_context *c = talloc_get_type(creq->async.private_data,
struct composite_context);
struct smb2_connect_state *state = talloc_get_type(c->private_data,
struct smb2_connect_state);
struct smbcli_socket *sock;
struct smb2_transport *transport;
struct smb2_request *req;
uint16_t dialects[1];
c->status = smbcli_sock_connect_recv(creq, state, &sock);
if (!composite_is_ok(c)) return;
transport = smb2_transport_init(sock, state);
if (composite_nomem(transport, c)) return;
ZERO_STRUCT(state->negprot);
state->negprot.in.dialect_count = 1;
state->negprot.in.security_mode = 0;
state->negprot.in.capabilities = 0;
unix_to_nt_time(&state->negprot.in.start_time, time(NULL));
dialects[0] = 0;
state->negprot.in.dialects = dialects;
req = smb2_negprot_send(transport, &state->negprot);
if (composite_nomem(req, c)) return;
req->async.fn = continue_negprot;
req->async.private = c;
}
/*
continue after a resolve finishes
*/
static void continue_resolve(struct composite_context *creq)
{
struct composite_context *c = talloc_get_type(creq->async.private_data,
struct composite_context);
struct smb2_connect_state *state = talloc_get_type(c->private_data,
struct smb2_connect_state);
const char *addr;
const char *ports[2] = { "445", NULL };
c->status = resolve_name_recv(creq, state, &addr);
if (!composite_is_ok(c)) return;
creq = smbcli_sock_connect_send(state, addr, ports, state->host, state->resolve_ctx, c->event_ctx);
composite_continue(c, creq, continue_socket, c);
}
/*
a composite function that does a full negprot/sesssetup/tcon, returning
a connected smb2_tree
*/
struct composite_context *smb2_connect_send(TALLOC_CTX *mem_ctx,
const char *host,
const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
struct event_context *ev)
{
struct composite_context *c;
struct smb2_connect_state *state;
struct nbt_name name;
struct composite_context *creq;
c = composite_create(mem_ctx, ev);
if (c == NULL) return NULL;
state = talloc(c, struct smb2_connect_state);
if (composite_nomem(state, c)) return c;
c->private_data = state;
state->credentials = credentials;
state->host = talloc_strdup(c, host);
if (composite_nomem(state->host, c)) return c;
state->share = talloc_strdup(c, share);
if (composite_nomem(state->share, c)) return c;
state->resolve_ctx = talloc_reference(state, resolve_ctx);
ZERO_STRUCT(name);
name.name = host;
creq = resolve_name_send(resolve_ctx, &name, c->event_ctx);
composite_continue(c, creq, continue_resolve, c);
return c;
}
/*
receive a connect reply
*/
NTSTATUS smb2_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
struct smb2_tree **tree)
{
NTSTATUS status;
struct smb2_connect_state *state = talloc_get_type(c->private_data,
struct smb2_connect_state);
status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
*tree = talloc_steal(mem_ctx, state->tree);
}
talloc_free(c);
return status;
}
/*
sync version of smb2_connect
*/
NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
const char *host, const char *share,
struct resolve_context *resolve_ctx,
struct cli_credentials *credentials,
struct smb2_tree **tree,
struct event_context *ev)
{
struct composite_context *c = smb2_connect_send(mem_ctx, host, share,
resolve_ctx,
credentials, ev);
return smb2_connect_recv(c, mem_ctx, tree);
}
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