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/*
* Unix SMB/CIFS implementation.
* RPC client transport over named pipes
* Copyright (C) Volker Lendecke 2009
*
* 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 "../lib/util/tevent_ntstatus.h"
#include "rpc_client/rpc_transport.h"
#include "librpc/ndr/ndr_table.h"
#include "libcli/smb/smbXcli_base.h"
#include "libcli/smb/tstream_smbXcli_np.h"
#include "client.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_CLI
struct rpc_transport_np_init_state {
struct rpc_cli_transport *transport;
int retries;
struct tevent_context *ev;
struct smbXcli_conn *conn;
int timeout;
struct timeval abs_timeout;
const char *pipe_name;
struct smbXcli_session *session;
struct smbXcli_tcon *tcon;
uint16_t pid;
};
static void rpc_transport_np_init_pipe_open(struct tevent_req *subreq);
struct tevent_req *rpc_transport_np_init_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct cli_state *cli,
const struct ndr_interface_table *table)
{
struct tevent_req *req;
struct rpc_transport_np_init_state *state;
struct tevent_req *subreq;
req = tevent_req_create(mem_ctx, &state,
struct rpc_transport_np_init_state);
if (req == NULL) {
return NULL;
}
if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
state->tcon = cli->smb2.tcon;
state->session = cli->smb2.session;
} else {
state->tcon = cli->smb1.tcon;
state->session = cli->smb1.session;
state->pid = cli->smb1.pid;
}
state->ev = ev;
state->conn = cli->conn;
state->timeout = cli->timeout;
state->abs_timeout = timeval_current_ofs_msec(cli->timeout);
state->pipe_name = dcerpc_default_transport_endpoint(state, NCACN_NP,
table);
if (tevent_req_nomem(state->pipe_name, req)) {
return tevent_req_post(req, ev);
}
while (state->pipe_name[0] == '\\') {
state->pipe_name++;
}
subreq = tstream_smbXcli_np_open_send(state, ev, state->conn,
state->session, state->tcon,
state->pid, state->timeout,
state->pipe_name);
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, rpc_transport_np_init_pipe_open, req);
return req;
}
static void rpc_transport_np_init_pipe_open_retry(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval t,
void *priv_data)
{
struct tevent_req *subreq;
struct tevent_req *req = talloc_get_type(priv_data, struct tevent_req);
struct rpc_transport_np_init_state *state = tevent_req_data(
req, struct rpc_transport_np_init_state);
subreq = tstream_smbXcli_np_open_send(state, ev,
state->conn,
state->session,
state->tcon,
state->pid,
state->timeout,
state->pipe_name);
if (tevent_req_nomem(subreq, req)) {
return;
}
tevent_req_set_callback(subreq, rpc_transport_np_init_pipe_open, req);
state->retries++;
}
static void rpc_transport_np_init_pipe_open(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct rpc_transport_np_init_state *state = tevent_req_data(
req, struct rpc_transport_np_init_state);
NTSTATUS status;
struct tstream_context *stream;
status = tstream_smbXcli_np_open_recv(subreq, state, &stream);
TALLOC_FREE(subreq);
if (NT_STATUS_EQUAL(status, NT_STATUS_PIPE_NOT_AVAILABLE)
&& (!timeval_expired(&state->abs_timeout))) {
struct tevent_timer *te;
/*
* Retry on STATUS_PIPE_NOT_AVAILABLE, Windows starts some
* servers (FssagentRpc) on demand.
*/
DEBUG(2, ("RPC pipe %s not available, retry %d\n",
state->pipe_name, state->retries));
te = tevent_add_timer(state->ev, state,
timeval_current_ofs_msec(100 * state->retries),
rpc_transport_np_init_pipe_open_retry, req);
if (tevent_req_nomem(te, req)) {
DEBUG(2, ("Failed to create asynchronous "
"tevent_timer"));
}
return;
} else if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
status = rpc_transport_tstream_init(state,
&stream,
&state->transport);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
}
tevent_req_done(req);
}
NTSTATUS rpc_transport_np_init_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
struct rpc_cli_transport **presult)
{
struct rpc_transport_np_init_state *state = tevent_req_data(
req, struct rpc_transport_np_init_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
*presult = talloc_move(mem_ctx, &state->transport);
return NT_STATUS_OK;
}
NTSTATUS rpc_transport_np_init(TALLOC_CTX *mem_ctx, struct cli_state *cli,
const struct ndr_interface_table *table,
struct rpc_cli_transport **presult)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_OK;
ev = samba_tevent_context_init(frame);
if (ev == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
req = rpc_transport_np_init_send(frame, ev, cli, table);
if (req == NULL) {
status = NT_STATUS_NO_MEMORY;
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = rpc_transport_np_init_recv(req, mem_ctx, presult);
fail:
TALLOC_FREE(frame);
return status;
}
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