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/*
Unix SMB/CIFS implementation.
forwarding of RPC calls to other tasks
Copyright (C) Andrew Tridgell 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 <tevent.h>
#include "rpc_server/dcerpc_server.h"
#include "librpc/gen_ndr/dcerpc.h"
#include "rpc_server/common/common.h"
#include "messaging/irpc.h"
#include "auth/auth.h"
struct dcesrv_forward_state {
const char *opname;
struct dcesrv_call_state *dce_call;
};
/*
called when the forwarded rpc request is finished
*/
static void dcesrv_irpc_forward_callback(struct tevent_req *subreq)
{
struct dcesrv_forward_state *st =
tevent_req_callback_data(subreq,
struct dcesrv_forward_state);
const char *opname = st->opname;
NTSTATUS status;
status = dcerpc_binding_handle_call_recv(subreq);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("IRPC callback failed for %s - %s\n",
opname, nt_errstr(status)));
st->dce_call->fault_code = DCERPC_FAULT_CANT_PERFORM;
}
status = dcesrv_reply(st->dce_call);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("%s_handler: dcesrv_reply() failed - %s\n",
opname, nt_errstr(status)));
}
}
/**
* Forward a RPC call using IRPC to another task
*/
void dcesrv_irpc_forward_rpc_call(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
void *r, uint32_t callid,
const struct ndr_interface_table *ndr_table,
const char *dest_task, const char *opname,
uint32_t timeout)
{
struct dcesrv_forward_state *st;
struct dcerpc_binding_handle *binding_handle;
struct tevent_req *subreq;
struct auth_session_info *session_info =
dcesrv_call_session_info(dce_call);
struct imessaging_context *imsg_ctx =
dcesrv_imessaging_context(dce_call->conn);
st = talloc(mem_ctx, struct dcesrv_forward_state);
if (st == NULL) {
dce_call->fault_code = DCERPC_FAULT_CANT_PERFORM;
return;
}
st->dce_call = dce_call;
st->opname = opname;
/* if the caller has said they can't support async calls
then fail the call */
if (!(dce_call->state_flags & DCESRV_CALL_STATE_FLAG_MAY_ASYNC)) {
/* we're not allowed to reply async */
DEBUG(0,("%s: Not available synchronously\n", dest_task));
dce_call->fault_code = DCERPC_FAULT_CANT_PERFORM;
return;
}
binding_handle = irpc_binding_handle_by_name(st,
imsg_ctx,
dest_task,
ndr_table);
if (binding_handle == NULL) {
DEBUG(0,("%s: Failed to forward request to %s task\n",
opname, dest_task));
dce_call->fault_code = DCERPC_FAULT_CANT_PERFORM;
return;
}
/* reset timeout for the handle */
dcerpc_binding_handle_set_timeout(binding_handle, timeout);
/* add security token to the handle*/
irpc_binding_handle_add_security_token(binding_handle,
session_info->security_token);
/* forward the call */
subreq = dcerpc_binding_handle_call_send(st, dce_call->event_ctx,
binding_handle,
NULL, ndr_table,
callid,
dce_call, r);
if (subreq == NULL) {
DEBUG(0,("%s: Failed to forward request to %s task\n",
opname, dest_task));
dce_call->fault_code = DCERPC_FAULT_CANT_PERFORM;
return;
}
/* mark the request as replied async */
dce_call->state_flags |= DCESRV_CALL_STATE_FLAG_ASYNC;
/* setup the callback */
tevent_req_set_callback(subreq, dcesrv_irpc_forward_callback, st);
}
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