Blame src/tty/ntapi_tty_create_session.c

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/********************************************************/
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/*  ntapi: Native API core library                      */
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/*  Copyright (C) 2013--2016  Z. Gilboa                 */
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/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
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/********************************************************/
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#include <psxtypes/psxtypes.h>
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#include <ntapi/ntapi.h>
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#include "ntapi_impl.h"
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static int32_t __fastcall __tty_create_session_return(
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	nt_create_process_params *	params,
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	int32_t				status)
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{
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	if (status)
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		__ntapi->zw_terminate_process(
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			params->hprocess,
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			NT_STATUS_UNEXPECTED_IO_ERROR);
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	__ntapi->zw_close(params->hprocess);
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	__ntapi->zw_close(params->hthread);
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	return status;
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}
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int32_t __stdcall __ntapi_tty_create_session(
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	__out	void **			hport,
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	__out	nt_port_name *		port_name,
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	__in	nt_tty_session_type	type,
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	__in	const nt_guid *		guid		__optional,
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	__in	wchar16_t *		image_name	__optional)
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{
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	nt_status			status;
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	ntapi_internals *		__internals;
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	nt_port_attr			port_attr;
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	nt_runtime_data			ssattr;
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	nt_runtime_data_block		rtblock;
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	nt_create_process_params	params;
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	wchar16_t __attr_aligned__(8) __tty_image_name_fallback[] =  {
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		'\\','?','?','\\',
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		'C',':',
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		'\\','m','i','d','i','p','i','x',
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		'\\','b','i','n',
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		'\\','n','t','c','t','t','y',
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		'.','e','x','e',
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		0};
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	/* init */
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	__internals = __ntapi_internals();
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	__ntapi->tt_aligned_block_memset(
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		&port_attr,0,sizeof(port_attr));
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	switch (type) {
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		case NT_TTY_SESSION_PRIMARY:
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			port_attr.type    = NT_PORT_TYPE_SUBSYSTEM;
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			port_attr.subtype = NT_PORT_SUBTYPE_DEFAULT;
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			if (!hport)
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				hport = &__internals->hport_tty_session;
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			if (!port_name)
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				port_name = __internals->subsystem;
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			if (!image_name)
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				image_name = __tty_image_name_fallback;
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			break;
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		case NT_TTY_SESSION_PRIVATE:
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			port_attr.type    = NT_PORT_TYPE_SUBSYSTEM;
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			port_attr.subtype = NT_PORT_SUBTYPE_PRIVATE;
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			break;
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		default:
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			return NT_STATUS_INVALID_PARAMETER;
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	}
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	/* port guid */
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	if (guid)
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		__ntapi->tt_guid_copy(
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			&port_attr.guid,
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			guid);
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	else
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		__ntapi->tt_port_guid_from_type(
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			&port_attr.guid,
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			port_attr.type,
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			port_attr.subtype);
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	/* port keys */
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	if ((status = __ntapi->tt_port_generate_keys(&port_attr.keys)))
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		return status;
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	/* port name */
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	__ntapi->tt_port_name_from_attributes(
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		port_name,
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		&port_attr);
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	/* subsystem attributes */
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	__ntapi->tt_aligned_block_memset(
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		&ssattr,0,sizeof(ssattr));
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	ssattr.srv_type		= port_attr.type;
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	ssattr.srv_subtype	= port_attr.subtype;
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	ssattr.srv_keys[0]	= port_attr.keys.key[0];
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	ssattr.srv_keys[1]	= port_attr.keys.key[1];
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	ssattr.srv_keys[2]	= port_attr.keys.key[2];
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	ssattr.srv_keys[3]	= port_attr.keys.key[3];
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	ssattr.srv_keys[4]	= port_attr.keys.key[4];
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	ssattr.srv_keys[5]	= port_attr.keys.key[5];
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	__ntapi->tt_guid_copy(
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		&ssattr.srv_guid,
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		&port_attr.guid);
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	if ((status = __ntapi->tt_create_private_event(
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			&ssattr.srv_ready,
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			NT_SYNCHRONIZATION_EVENT,
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			NT_EVENT_NOT_SIGNALED)))
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		return status;
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	/* create subsystem process */
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	rtblock.addr		= &ssattr;
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	rtblock.size		= sizeof(ssattr);
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	rtblock.remote_addr	= 0;
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	rtblock.remote_size	= 0;
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	rtblock.flags		= NT_RUNTIME_DATA_DUPLICATE_SESSION_HANDLES;
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	__ntapi->tt_aligned_block_memset(
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		&params,0,sizeof(params));
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	params.image_name	= image_name;
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	params.rtblock		= &rtblock;
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	if ((status = __ntapi->tt_create_native_process(&params)))
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		return status;
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	if ((status = __ntapi->zw_wait_for_single_object(
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			ssattr.srv_ready,
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			NT_SYNC_NON_ALERTABLE,
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			0)))
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		return __tty_create_session_return(&params,status);
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	/* connect to subsystem */
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	if ((status = __ntapi->tty_connect(
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			hport,
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			&port_name->base_named_objects[0],
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			NT_SECURITY_IMPERSONATION)))
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		return __tty_create_session_return(&params,status);
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	/* finalize primary session */
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	if (type == NT_TTY_SESSION_PRIMARY) {
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		if (hport != &__internals->hport_tty_session)
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			__internals->hport_tty_session = *hport;
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		if (port_name != __internals->subsystem)
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			__ntapi->tt_memcpy_utf16(
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				__internals->subsystem->base_named_objects,
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				port_name->base_named_objects,
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				sizeof(*port_name));
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	};
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	return __tty_create_session_return(&params,NT_STATUS_SUCCESS);
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}