Blame src/daemon/ntapi_dsr_init.c

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/********************************************************/
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/*  ntapi: Native API core library                      */
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/*  Copyright (C) 2013--2017  Z. Gilboa                 */
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/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
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/********************************************************/
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#include <ntapi/nt_atomic.h>
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#include <ntapi/nt_status.h>
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#include <ntapi/nt_thread.h>
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#include <ntapi/nt_port.h>
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#include <ntapi/nt_daemon.h>
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#include <ntapi/ntapi.h>
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#include "ntapi_impl.h"
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int32_t __attr_hidden__ __ntapi_tt_seh_frame(void *, void *, void *, int32_t (*)(nt_daemon_params *));
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static int32_t __stdcall __ntapi_dsr_once(nt_daemon_params * params);
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int32_t __stdcall __ntapi_dsr_init(nt_daemon_params * params)
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{
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	int32_t			status;
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	nt_thread_params	tparams;
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	/* report status */
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	at_store_32(
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		&params->exit_code_daemon_loop,
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		NT_STATUS_PENDING);
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	at_store_32(
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		&params->exit_code_daemon_start,
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		NT_STATUS_PENDING);
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	at_store_32(
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		&params->exit_code_internal_client,
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		NT_STATUS_PENDING);
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	/* port_keys */
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	if (params->flags & NT_DSR_INIT_GENERATE_KEYS)
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		if ((status = __ntapi->tt_port_generate_keys(params->port_keys)))
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			return status;
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	/* port_name_keys */
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	if (params->flags & NT_DSR_INIT_FORMAT_KEYS)
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		__ntapi->tt_port_format_keys(
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			params->port_keys,
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			params->port_name_keys);
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	/* 'port-created' event */
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	if (!params->hevent_daemon_port) {
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		if ((status = __ntapi->tt_create_private_event(
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				&params->hevent_daemon_port,
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				NT_NOTIFICATION_EVENT,
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				NT_EVENT_NOT_SIGNALED)))
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			return status;
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		if (params->pevent_daemon_port)
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			at_store(
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				(intptr_t *)params->pevent_daemon_port,
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				(intptr_t)params->hevent_daemon_port);
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	}
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	/* 'daemon-is-ready' event */
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	if (!params->hevent_daemon_ready) {
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		if ((status = __ntapi->tt_create_private_event(
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				&params->hevent_daemon_ready,
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				NT_NOTIFICATION_EVENT,
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				NT_EVENT_NOT_SIGNALED)))
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			return status;
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		if (params->pevent_daemon_ready)
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			at_store(
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				(intptr_t *)params->pevent_daemon_ready,
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				(intptr_t)params->hevent_daemon_ready);
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	}
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	/* 'internal-client-is-ready' event */
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	if (!params->hevent_internal_client_ready) {
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		if ((status = __ntapi->tt_create_private_event(
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				&params->hevent_internal_client_ready,
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				NT_NOTIFICATION_EVENT,
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				NT_EVENT_NOT_SIGNALED)))
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			return status;
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		if (params->pevent_internal_client_ready)
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			at_store(
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				(intptr_t *)params->pevent_internal_client_ready,
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				(intptr_t)params->hevent_internal_client_ready);
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	}
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	/* memory barrier */
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	__ntapi->tt_aligned_block_memlock(
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		params,
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		sizeof(*params));
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	__ntapi->tt_aligned_block_memlock(
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		params->port_name,
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		sizeof(*params->port_name));
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	/* daemon dedicated thread: general parameters */
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	__ntapi->tt_aligned_block_memset(
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		&tparams,0,sizeof(tparams));
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	tparams.start = (nt_thread_start_routine *)__ntapi_dsr_start;
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	tparams.arg   = params;
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	/* daemon dedicated thread: stack parameters (optional) */
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	tparams.stack_size_commit	= params->stack_size_commit;
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	tparams.stack_size_reserve	= params->stack_size_reserve;
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	tparams.stack_info		= params->stack_info;
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	/* daemon dedicated thread: create */
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	if ((status = __ntapi->tt_create_local_thread(&tparams)))
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		return status;
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	at_store(
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		(intptr_t *)&params->hthread_daemon_loop,
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		(intptr_t)tparams.hthread);
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	/* daemon dedicated thread: actual stack size */
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	params->stack_size_commit	= tparams.stack_size_commit;
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	params->stack_size_reserve	= tparams.stack_size_reserve;
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	/* wait for the port to be created */
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	if ((status = __ntapi->zw_wait_for_single_object(
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			params->hevent_daemon_port,
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			NT_SYNC_NON_ALERTABLE,0)))
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		return status;
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	/* overcome potential scheduling bug in recent (10.0) kernel */
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	while (params->exit_code_daemon_start == NT_STATUS_PENDING)
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		__ntapi->zw_delay_execution(
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			NT_SYNC_NON_ALERTABLE,
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			&(nt_timeout){{0,0}});
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	/* verify the port's successful creation */
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	if (at_locked_xadd_32(&params->exit_code_daemon_start,0))
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		return NT_STATUS_PORT_NOT_SET;
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	/* internal connection task-specific thread */
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	__ntapi->tt_aligned_block_memset(
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		&tparams,0,sizeof(tparams));
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	tparams.start = (nt_thread_start_routine *)__ntapi_dsr_internal_client_connect;
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	tparams.arg   = params;
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	if ((status = __ntapi->tt_create_local_thread(&tparams)))
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		return status;
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	at_store(
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		(intptr_t *)&params->hthread_internal_client,
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		(intptr_t)tparams.hthread);
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	/* wait for the task-specific thread to exit */
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	if ((status = __ntapi->zw_wait_for_single_object(
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			params->hthread_internal_client,
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			NT_SYNC_NON_ALERTABLE,0)))
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		return status;
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	/* overcome potential scheduling bug in recent (10.0) kernel */
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	while (params->exit_code_internal_client == NT_STATUS_PENDING)
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		__ntapi->zw_delay_execution(
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			NT_SYNC_NON_ALERTABLE,
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			&(nt_timeout){{0,0}});
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	/* verify a successful internal connection */
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	if (at_locked_xadd_32(&params->exit_code_internal_client,0))
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		return params->exit_code_internal_client;
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	/* all_done */
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	__ntapi->zw_set_event(
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		params->hevent_daemon_ready,
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		0);
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	if (params->flags & NT_DSR_INIT_CLOSE_EVENTS) {
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		__ntapi->zw_close(params->hevent_daemon_port);
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		__ntapi->zw_close(params->hevent_daemon_ready);
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		__ntapi->zw_close(params->hevent_internal_client_ready);
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	}
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	return NT_STATUS_SUCCESS;;
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}
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/* __ntapi_dsr_start executes in the daemon's dedicated thread */
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static int32_t __ntapi_dsr_start_impl(nt_daemon_params * params)
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{
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	int32_t status;
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	void *	ctx;
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	int32_t (*loop)(void *);
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	ctx  = params->daemon_loop_context;
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	loop = params->daemon_loop_routine;
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	if ((status = __ntapi_dsr_once(params)))
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		return status;
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	if ((status = __ntapi_dsr_create_port(params)))
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		return status;
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	if ((status = __ntapi_dsr_connect_internal_client(params)))
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		return status;
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	if ((status = loop(ctx)))
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		return status;
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	return NT_STATUS_SUCCESS;
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}
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static int32_t __ntapi_dsr_start_routine(nt_daemon_params * params)
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{
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	at_store_32(
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		&params->exit_code_daemon_loop,
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		NT_STATUS_MORE_PROCESSING_REQUIRED);
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	return __ntapi->zw_terminate_thread(
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		NT_CURRENT_THREAD_HANDLE,
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		__ntapi_dsr_start_impl(params));
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}
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int32_t __stdcall __ntapi_dsr_start(nt_daemon_params * params)
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{
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	return __ntapi_tt_seh_frame(
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		params,0,0,
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		__ntapi_dsr_start_routine);
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}
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/* __ntapi_dsr_once executes in the daemon's dedicated thread */
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static int32_t __stdcall __ntapi_dsr_once(nt_daemon_params * params)
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{
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	int32_t status;
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	if (!params->daemon_once_routine)
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		return NT_STATUS_SUCCESS;
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	if ((status = params->daemon_once_routine(params->daemon_loop_context)))
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		at_store_32(
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			&params->exit_code_daemon_start,
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			status);
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	return status;
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}
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/* __ntapi_dsr_create_port executes in the daemon's dedicated thread */
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static int32_t __stdcall __ntapi_dsr_create_port_exit(
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	nt_daemon_params *	params,
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	int32_t			status)
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{
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	at_store_32(
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		&params->exit_code_daemon_start,
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		status);
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	__ntapi->zw_set_event(
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		params->hevent_daemon_port,
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		0);
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	return status;
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}
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int32_t __stdcall __ntapi_dsr_create_port(nt_daemon_params * params)
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{
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	int32_t				status;
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	nt_object_attributes		oa;
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	nt_security_quality_of_service	sqos;
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	nt_unicode_string		server_name;
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	/* init server_name */
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	server_name.strlen = (uint16_t)__ntapi->tt_string_null_offset_short((int16_t *)params->port_name);
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	server_name.maxlen = 0;
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	server_name.buffer = params->port_name;
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	/* init security structure */
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	sqos.length 			= sizeof(sqos);
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	sqos.impersonation_level	= NT_SECURITY_IMPERSONATION;
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	sqos.context_tracking_mode	= NT_SECURITY_TRACKING_DYNAMIC;
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	sqos.effective_only		= 1;
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	/* init the port's object attributes */
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	oa.len		= sizeof(oa);
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	oa.root_dir	= 0;
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	oa.obj_name	= &server_name;
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	oa.obj_attr	= 0;
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	oa.sec_desc	= params->port_sd;
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	oa.sec_qos	= &sqo;;
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	/* create the port */
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	if ((status = __ntapi->zw_create_port(
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			&params->hport_daemon,
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			&oa,0,(uint32_t)params->port_msg_size,
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			0)))
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		return __ntapi_dsr_create_port_exit(
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			params,status);
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	/* return port info */
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	if (params->pport_daemon)
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		at_store(
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			(intptr_t *)params->pport_daemon,
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			(intptr_t)params->hport_daemon);
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	/* set status */
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	at_store_32(
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		&params->exit_code_daemon_start,
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		NT_STATUS_SUCCESS);
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	/* signal the port-created event */
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	__ntapi->zw_set_event(
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		params->hevent_daemon_port,
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		0);
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	return NT_STATUS_SUCCESS;
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}