/********************************************************/

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013--2017  Z. Gilboa                 */

/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */

/********************************************************/

#include <ntapi/nt_atomic.h>

#include <ntapi/nt_status.h>

#include <ntapi/nt_thread.h>

#include <ntapi/nt_port.h>

#include <ntapi/nt_daemon.h>

#include <ntapi/ntapi.h>

#include "ntapi_impl.h"

int32_t __ntapi_tt_seh_frame(void *, void *, void *, int32_t (*)(nt_daemon_params *));

static int32_t __ntapi_dsr_internal_client_connect_exit(

	nt_daemon_params *	params,

	int32_t			status)

{

	at_store_32(

		&params->exit_code_internal_client,

		status);

	return __ntapi->zw_terminate_thread(

		NT_CURRENT_THREAD_HANDLE,

		status);

}

/* __ntapi_dsr_internal_client_connect executes in its own temporary thread */

static int32_t __ntapi_dsr_internal_client_connect_impl(nt_daemon_params * params)

{

	int32_t				status;

	nt_unicode_string		server_name;

	nt_object_attributes		oa;

	nt_security_quality_of_service	sqos;

	/* init server_name */

	server_name.strlen = (uint16_t)__ntapi->tt_string_null_offset_short((int16_t *)params->port_name);

	server_name.maxlen = 0;

	server_name.buffer = params->port_name;

	/* init security structure */

	sqos.length 			= sizeof(sqos);

	sqos.impersonation_level	= NT_SECURITY_IMPERSONATION;

	sqos.context_tracking_mode	= NT_SECURITY_TRACKING_DYNAMIC;

	sqos.effective_only		= 1;

	/* init the port's object attributes */

	oa.len		= sizeof(oa);

	oa.root_dir	= 0;

	oa.obj_name	= &server_name;

	oa.obj_attr	= 0;

	oa.sec_desc	= params->port_sd;

	oa.sec_qos	= &sqo;;

	/* establish internal connection */

	if ((status = __ntapi->zw_connect_port(

			&params->hport_internal_client,

			&server_name,

			&sqos,

			0,0,0,0,0)))

		return __ntapi_dsr_internal_client_connect_exit(

			params,status);

	/* update port info */

	if (params->pport_internal_client)

		at_store(

			(intptr_t *)params->pport_internal_client,

			(intptr_t)params->hport_internal_client);

	/* signal the 'internal-client-is-ready' event */

	status = __ntapi->zw_set_event(

		params->hevent_internal_client_ready,

		0);

	/* exit the task-specific thread */

	return __ntapi_dsr_internal_client_connect_exit(

		params,status);

}

int32_t __ntapi_dsr_internal_client_connect(nt_daemon_params * params)

{

	return __ntapi_tt_seh_frame(

		params,0,0,

		__ntapi_dsr_internal_client_connect_impl);

}

/* __ntapi_dsr_connect_internal_client executes in the daemon's dedicated thread */

int32_t __ntapi_dsr_connect_internal_client(nt_daemon_params * params)

{

	int32_t			status;

	intptr_t		port_id;

	nt_port_message		port_msg;

	void *			hport;

	/* first connection */

	if ((status = __ntapi->zw_reply_wait_receive_port(

			params->hport_daemon,

			&port_id,0,&port_msg)))

		return status;

	/* the internal client must be first */

	if (port_msg.client_id.process_id != pe_get_current_process_id())

		return NT_STATUS_PORT_CONNECTION_REFUSED;

	/* accept connection request */

	if ((status = __ntapi->zw_accept_connect_port(

			&hport,

			port_msg.client_id.process_id,

			(nt_port_message *)&port_msg,

			NT_LPC_ACCEPT_CONNECTION,

			(nt_port_section_write *)0,

			(nt_port_section_read *)0)))

		return status;

	/* finalize connection */

	if ((status = __ntapi->zw_complete_connect_port(hport)))

		return status;

	/* all done */

	return NT_STATUS_SUCCESS;

}