advisory file locking: integrated client-side interfaces.

6 files changed, 661 insertions, 0 deletions

diff --git a/src/afl/ntapi_afl_connect.c b/src/afl/ntapi_afl_connect.c
new file mode 100644
index 0000000..1e7215a
--- /dev/null
+++ b/src/afl/ntapi_afl_connect.c
@@ -0,0 +1,335 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_afl.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static const nt_guid	g_aflpid    = NT_IPC_GUID_AFLPID;
+static const wchar16_t	p_aflpid[6] = NT_IPC_OBJDIR_PREFIX_AFLPID;
+
+static int32_t __aflctl_get_service_attr(
+	nt_rtdata *		rtdata,
+	nt_tty_service_info *	aflctl)
+{
+	nt_iosb iosb;
+
+	/* inherited runtime data? */
+	if (rtdata->aflctl_keys[0]) {
+		aflctl->attr.ver_major = 0;
+		aflctl->attr.ver_minor = 0;
+		aflctl->attr.options   = 0;
+		aflctl->attr.flags     = 0;
+
+		aflctl->attr.type    = rtdata->aflctl_type;
+		aflctl->attr.subtype = rtdata->aflctl_subtype;
+
+		aflctl->attr.keys.key[0] = rtdata->aflctl_keys[0];
+		aflctl->attr.keys.key[1] = rtdata->aflctl_keys[1];
+		aflctl->attr.keys.key[2] = rtdata->aflctl_keys[2];
+		aflctl->attr.keys.key[3] = rtdata->aflctl_keys[3];
+		aflctl->attr.keys.key[4] = rtdata->aflctl_keys[4];
+		aflctl->attr.keys.key[5] = rtdata->aflctl_keys[5];
+
+		__ntapi->tt_guid_copy(
+			&aflctl->attr.guid,
+			&rtdata->aflctl_guid);
+
+		return NT_STATUS_SUCCESS;
+	}
+
+	/* obtain service info */
+	return __ntapi->tty_query_information_service(
+		0,&iosb,aflctl,
+		&(nt_guid)NT_PORT_GUID_AFLCTL,
+		0,0);
+}
+
+static int32_t __aflctl_server_connect(
+	nt_rtdata *		rtdata,
+	nt_tty_service_info *	aflctl)
+{
+	int32_t status;
+
+	/* already cononected? */
+	if (rtdata->haflctl)
+		return NT_STATUS_SUCCESS;
+
+	/* connect */
+	if ((status = __ntapi->ipc_connect_by_attr(
+			&rtdata->haflctl,
+			&aflctl->attr)))
+		return status;
+
+	/* update */
+	rtdata->aflctl_type    = aflctl->attr.type;
+	rtdata->aflctl_subtype = aflctl->attr.subtype;
+
+	rtdata->aflctl_keys[0] = aflctl->attr.keys.key[0];
+	rtdata->aflctl_keys[1] = aflctl->attr.keys.key[1];
+	rtdata->aflctl_keys[2] = aflctl->attr.keys.key[2];
+	rtdata->aflctl_keys[3] = aflctl->attr.keys.key[3];
+	rtdata->aflctl_keys[4] = aflctl->attr.keys.key[4];
+	rtdata->aflctl_keys[5] = aflctl->attr.keys.key[5];
+
+	__ntapi->tt_guid_copy(
+		&rtdata->aflctl_guid,
+		&aflctl->attr.guid);
+
+	return NT_STATUS_SUCCESS;
+}
+
+static int32_t __aflpid_symlink_set(
+	nt_rtdata *		rtdata,
+	nt_tty_service_info *	aflctl)
+{
+	int32_t			status;
+	void *			hpiddir;
+	nt_port_name		svcname;
+	nt_unicode_string	str;
+
+	if (rtdata->haflpid)
+		return NT_STATUS_SUCCESS;
+
+	if (!rtdata->haflpiddir) {
+		if ((status = __ntapi->tt_open_ipc_object_directory(
+				&hpiddir,
+				NT_SEC_READ_CONTROL
+					| NT_DIRECTORY_QUERY
+					| NT_DIRECTORY_TRAVERSE
+					| NT_DIRECTORY_CREATE_OBJECT
+					| NT_DIRECTORY_CREATE_SUBDIRECTORY,
+				p_aflpid,&g_aflpid)))
+			return status;
+
+		if (at_locked_cas((intptr_t *)&rtdata->haflpiddir,0,(intptr_t)hpiddir))
+			__ntapi->zw_close(hpiddir);
+	}
+
+	__ntapi->tt_port_name_from_attr(
+		&svcname,&aflctl->attr);
+
+	str.strlen = (uint16_t)(__offsetof(nt_port_name,null_termination));
+	str.maxlen = sizeof(nt_port_name);
+	str.buffer = svcname.base_named_objects;
+
+	return __ntapi->tt_create_ipc_object_directory_entry(
+		&rtdata->haflpid,
+		NT_SEC_STANDARD_RIGHTS_ALL,
+		rtdata->haflpiddir,
+		0,&str,
+		pe_get_current_process_id());
+
+}
+
+static int32_t	__stdcall __afl_open(
+	void *			hipc,
+	nt_afl_info *		afl,
+	nt_iosb *		iosb,
+	nt_guid *		afldev,
+	uint32_t		opcode)
+{
+	int32_t			status;
+	nt_tty_port_msg		msg;
+	nt_iosb			siosb;
+	nt_tty_service_info	aflctl;
+	nt_runtime_data *	rtdata;
+
+	/* init */
+	rtdata = (__ntapi_internals())->rtdata;
+
+	/* aflctl service attributes */
+	if (!rtdata->haflpid)
+		if ((status = __aflctl_get_service_attr(rtdata,&aflctl)))
+			return status;
+
+	/* aflctl server */
+	if ((status = __aflctl_server_connect(rtdata,&aflctl)))
+		return status;
+
+	/* aflpid symlink */
+	if ((status = __aflpid_symlink_set(rtdata,&aflctl)))
+		return status;
+
+	/* hipc */
+	if (!hipc && (opcode == NT_TTY_AFL_ALLOC))
+		hipc = (__ntapi_internals())->rtdata->haflctl;
+
+	/* obtain afl info */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	if (!iosb)
+		iosb = &siosb;
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(nt_afl_info_msg) - sizeof(msg.header);
+	msg.header.msg_size		= sizeof(msg);
+	msg.ttyinfo.opcode		= opcode;
+
+	__ntapi->tt_guid_copy(
+		&msg.aflinfo.afldev,
+		afldev);
+
+	/* todo: device guid */
+
+	if ((status = __ntapi->zw_request_wait_reply_port(hipc,&msg,&msg)))
+		return status;
+	else if (msg.ttyinfo.status)
+		return msg.ttyinfo.status;
+
+	iosb->info   = sizeof(msg.svcinfo);
+	iosb->status = NT_STATUS_SUCCESS;
+
+	/* new afl node? */
+	if (opcode == NT_TTY_AFL_ALLOC)
+		if ((status = __ntapi->ipc_connect_by_attr(
+				&hipc,&msg.svcinfo.attr)))
+			return status;
+
+	/* all done */
+	__ntapi->tt_aligned_block_memset(
+		(uintptr_t *)afl,
+		0,sizeof(*afl));
+
+	afl->hport = hipc;
+
+	__ntapi->tt_guid_copy(
+		&afl->afldev,
+		afldev);
+
+	return NT_STATUS_SUCCESS;
+}
+
+
+int32_t	__ntapi_afl_create(
+	__in	void *			hport,
+	__out	nt_afl_info *		afl,
+	__in	nt_oa *			oa,
+	__out	nt_iosb *		iosb)
+{
+	nt_guid afldev;
+
+	/* validate */
+	if (!oa->root_dir)
+		return NT_STATUS_DIRECTORY_SERVICE_REQUIRED;
+
+	if (!oa->obj_name)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (oa->obj_name->strlen != sizeof(nt_guid_str_utf16))
+		return NT_STATUS_OBJECT_NAME_INVALID;
+
+	if (__ntapi->tt_string_to_guid_utf16(
+			(nt_guid_str_utf16 *)oa->obj_name->buffer,
+			&afldev))
+		return NT_STATUS_OBJECT_NAME_INVALID;
+
+	/* open afldev */
+	return __afl_open(
+		hport,afl,iosb,
+		&afldev,
+		NT_TTY_AFL_ALLOC);
+}
+
+
+int32_t	__stdcall __ntapi_afl_open(
+	__in	void *			hport,
+	__out	nt_afl_info *		afl,
+	__in	nt_oa *			oa,
+	__out	nt_iosb *		iosb)
+{
+	int32_t			status;
+	nt_guid			afldev;
+	void *			hsymlink;
+	nt_oa			ipcoa;
+	void *			hipc;
+	nt_rtdata *		rtdata;
+	nt_tty_service_info	aflctl;
+
+	/* init */
+	rtdata = (__ntapi_internals())->rtdata;
+
+	/* validate */
+	if (!oa->root_dir)
+		return NT_STATUS_DIRECTORY_SERVICE_REQUIRED;
+
+	if (!oa->obj_name)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (oa->obj_name->strlen != sizeof(nt_guid_str_utf16))
+		return NT_STATUS_OBJECT_NAME_INVALID;
+
+	if (__ntapi->tt_string_to_guid_utf16(
+			(nt_guid_str_utf16 *)oa->obj_name->buffer,
+			&afldev))
+		return NT_STATUS_OBJECT_NAME_INVALID;
+
+	/* open symlink */
+	ipcoa.len      = sizeof(ipcoa);
+	ipcoa.root_dir = oa->root_dir;
+	ipcoa.obj_name = oa->obj_name;
+	ipcoa.obj_attr = 0;
+	ipcoa.sec_desc = oa->sec_desc;
+	ipcoa.sec_qos  = oa->sec_qos;
+
+	status = __ntapi->zw_open_symbolic_link_object(
+		&hsymlink,
+		NT_SYMBOLIC_LINK_QUERY,
+		&ipcoa);
+
+	switch (status) {
+		case NT_STATUS_SUCCESS:
+			break;
+
+		case NT_STATUS_OBJECT_NAME_NOT_FOUND:
+		case NT_STATUS_OBJECT_PATH_NOT_FOUND:
+			if (oa->obj_attr & NT_OBJ_OPENIF)
+				return __afl_open(
+					hport,afl,iosb,
+					&afldev,
+					NT_TTY_AFL_ALLOC);
+			else
+				return status;
+
+		default:
+			return status;
+	}
+
+	/* aflctl service attributes */
+	if (!rtdata->haflpid)
+		if ((status = __aflctl_get_service_attr(rtdata,&aflctl)))
+			return status;
+
+	/* aflctl server */
+	if ((status = __aflctl_server_connect(rtdata,&aflctl)))
+		return status;
+
+	/* aflpid symlink */
+	if ((status = __aflpid_symlink_set(rtdata,&aflctl)))
+		return status;
+
+	/* ipc connect */
+	status = __ntapi->ipc_connect_by_symlink(
+		&hipc,hsymlink);
+
+	__ntapi->zw_close(
+		hsymlink);
+
+	if (status)
+		return status;
+
+	return __afl_open(
+		hipc,afl,iosb,
+		&afldev,
+		NT_TTY_AFL_OPEN);
+}
diff --git a/src/afl/ntapi_afl_fcntl.c b/src/afl/ntapi_afl_fcntl.c
new file mode 100644
index 0000000..3c60f54
--- /dev/null
+++ b/src/afl/ntapi_afl_fcntl.c
@@ -0,0 +1,42 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_afl.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+int32_t	__stdcall __ntapi_afl_fcntl(
+	__in	nt_afl_info *		afl,
+	__in	void *			hevent			__optional,
+	__in	nt_io_apc_routine *	apc_routine		__optional,
+	__in	void *			apc_context		__optional,
+	__out	nt_iosb *		iosb,
+	__in	uint32_t		fs_control_code,
+	__in	void *			input_buffer		__optional,
+	__in	uint32_t		input_buffer_length,
+	__out	void *			output_buffer		__optional,
+	__in	uint32_t		output_buffer_length)
+{
+	(void)afl;
+	(void)hevent;
+	(void)apc_routine;
+	(void)apc_context;
+	(void)iosb;
+	(void)fs_control_code;
+	(void)input_buffer;
+	(void)input_buffer_length;
+	(void)output_buffer;
+	(void)output_buffer_length;
+
+	/* internal only */
+	return NT_STATUS_NOT_IMPLEMENTED;
+}
diff --git a/src/afl/ntapi_afl_fdio.c b/src/afl/ntapi_afl_fdio.c
new file mode 100644
index 0000000..d236964
--- /dev/null
+++ b/src/afl/ntapi_afl_fdio.c
@@ -0,0 +1,61 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_afl.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static int32_t __afl_fdio(
+	nt_afl_info *		afl,
+	nt_iosb *		iosb,
+	uint32_t		opcode)
+{
+	int32_t			status;
+	nt_afl_info_msg		msg;
+
+	/* validate */
+	if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= opcode;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(afl->hport,&msg,&msg)))
+		return status;
+	else if (msg.data.ttyinfo.status)
+		return msg.data.ttyinfo.status;
+
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = 0;
+
+	return NT_STATUS_SUCCESS;
+}
+
+int32_t	__stdcall __ntapi_afl_cancel(
+	__in	nt_afl_info *		afl,
+	__out	nt_iosb *		iosb)
+{
+	return __afl_fdio(afl,iosb,NT_TTY_AFL_CANCEL);
+}
+
+int32_t	__stdcall __ntapi_afl_free(
+	__in	nt_afl_info *		afl,
+	__out	nt_iosb *		iosb)
+{
+	return __afl_fdio(afl,iosb,NT_TTY_AFL_FREE);
+}
diff --git a/src/afl/ntapi_afl_ioctl.c b/src/afl/ntapi_afl_ioctl.c
new file mode 100644
index 0000000..07d07cf
--- /dev/null
+++ b/src/afl/ntapi_afl_ioctl.c
@@ -0,0 +1,92 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_afl.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+int32_t	__stdcall __ntapi_afl_ioctl(
+	__in	nt_afl_info *		afl,
+	__in	void *			hevent			__optional,
+	__in	nt_io_apc_routine *	apc_routine		__optional,
+	__in	void *			apc_context		__optional,
+	__out	nt_iosb *		iosb,
+	__in	uint32_t		io_control_code,
+	__in	void *			input_buffer		__optional,
+	__in	uint32_t		input_buffer_length,
+	__out	void *			output_buffer		__optional,
+	__in	uint32_t		output_buffer_length)
+{
+	int32_t			status;
+	nt_afl_info_msg		msg;
+	nt_afl_op *		aflop;
+
+	/* validate */
+	if (io_control_code)
+		return NT_STATUS_NOT_SUPPORTED;
+
+	else if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!(aflop = (nt_afl_op *)input_buffer))
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (input_buffer_length != sizeof(nt_afl_op))
+		return NT_STATUS_INFO_LENGTH_MISMATCH;
+
+	if (output_buffer)
+		if (output_buffer_length < sizeof(nt_afl_op))
+			return NT_STATUS_BUFFER_TOO_SMALL;
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	__ntapi->tt_guid_copy(
+		&msg.data.aflinfo.afldev,
+		&afl->afldev);
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= NT_TTY_AFL_IOCTL;
+
+	msg.data.aflinfo.l_fileid	= aflop->l_fileid;
+	msg.data.aflinfo.l_start	= aflop->l_start;
+	msg.data.aflinfo.l_len		= aflop->l_len;
+	msg.data.aflinfo.l_pid		= aflop->l_pid;
+	msg.data.aflinfo.l_cmd		= aflop->l_cmd;
+
+	msg.data.aflinfo.hevent		= hevent;
+	msg.data.aflinfo.apc_routine	= apc_routine;
+	msg.data.aflinfo.apc_context	= apc_context;
+	msg.data.aflinfo.riosb		= iosb;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(afl->hport,&msg,&msg)))
+		return status;
+	else if (msg.data.ttyinfo.status)
+		return msg.data.ttyinfo.status;
+
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = msg.data.aflinfo.ntiosb.info;
+
+	if (msg.data.aflinfo.ntiosb.info && output_buffer) {
+		aflop = (nt_afl_op *)output_buffer;
+		aflop->l_fileid = msg.data.aflinfo.l_fileid;
+		aflop->l_start  = msg.data.aflinfo.l_start;
+		aflop->l_len    = msg.data.aflinfo.l_len;
+		aflop->l_pid    = msg.data.aflinfo.l_pid;
+		aflop->l_cmd    = msg.data.aflinfo.l_cmd;
+	}
+
+	return NT_STATUS_SUCCESS;
+}
diff --git a/src/afl/ntapi_afl_query.c b/src/afl/ntapi_afl_query.c
new file mode 100644
index 0000000..0128ac6
--- /dev/null
+++ b/src/afl/ntapi_afl_query.c
@@ -0,0 +1,67 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_afl.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+int32_t	__stdcall __ntapi_afl_query(
+	__in	nt_afl_info *		afl,
+	__out	nt_io_status_block *	iosb,
+	__out	void *			afl_info,
+	__in	uint32_t		afl_info_length,
+	__in	int32_t			afl_info_class)
+{
+	int32_t			status;
+	nt_afl_info_msg		msg;
+
+	/* validate */
+	if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!afl_info)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (afl_info_length < sizeof(msg.data.aflinfo))
+		return NT_STATUS_BUFFER_TOO_SMALL;
+
+	else if (afl_info_class)
+		return NT_STATUS_INVALID_INFO_CLASS;
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= NT_TTY_AFL_QUERY;
+
+	if ((status = __ntapi->zw_request_wait_reply_port(afl->hport,&msg,&msg)))
+		return status;
+	else if (msg.data.ttyinfo.status)
+		return msg.data.ttyinfo.status;
+
+	/* reply */
+	if (msg.header.data_size != sizeof(msg.data))
+		return NT_STATUS_UNEXPECTED_IO_ERROR;
+
+	__ntapi->tt_generic_memcpy(
+		afl_info,
+		&msg.data.aflinfo,
+		sizeof(msg.data.aflinfo));
+
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = sizeof(msg.data.aflinfo);
+
+	return NT_STATUS_SUCCESS;
+}
diff --git a/src/afl/ntapi_afl_set.c b/src/afl/ntapi_afl_set.c
new file mode 100644
index 0000000..c3aecc4
--- /dev/null
+++ b/src/afl/ntapi_afl_set.c
@@ -0,0 +1,64 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2017  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_string.h>
+#include <ntapi/nt_atomic.h>
+#include <ntapi/nt_port.h>
+#include <ntapi/nt_ipc.h>
+#include <ntapi/nt_afl.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+int32_t	__stdcall __ntapi_afl_set(
+	__in	nt_afl_info *		afl,
+	__out	nt_io_status_block *	iosb,
+	__in	void *			afl_info,
+	__in	uint32_t		afl_info_length,
+	__in	int32_t			afl_info_class)
+{
+	int32_t			status;
+	nt_afl_info_msg		msg;
+
+	/* validate */
+	if (!iosb)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (!afl_info)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	else if (afl_info_length != sizeof(msg.data.aflinfo))
+		return NT_STATUS_INFO_LENGTH_MISMATCH;
+
+	else if (afl_info_class)
+		return NT_STATUS_INVALID_INFO_CLASS;
+
+	/* msg */
+	__ntapi->tt_aligned_block_memset(
+		&msg,0,sizeof(msg));
+
+	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;
+	msg.header.data_size		= sizeof(msg.data);
+	msg.header.msg_size		= sizeof(msg);
+	msg.data.ttyinfo.opcode		= NT_TTY_AFL_SET;
+
+	__ntapi->tt_generic_memcpy(
+		&msg.data.aflinfo,
+		afl_info,
+		sizeof(msg.data.aflinfo));
+
+	if ((status = __ntapi->zw_request_wait_reply_port(afl->hport,&msg,&msg)))
+		return status;
+	else if (msg.data.ttyinfo.status)
+		return msg.data.ttyinfo.status;
+
+	/* reply */
+	iosb->status = NT_STATUS_SUCCESS;
+	iosb->info   = 0;
+
+	return NT_STATUS_SUCCESS;
+}