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

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013--2016  Z. Gilboa                 */

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

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

#include <psxtypes/psxtypes.h>

#include <ntapi/nt_port.h>

#include <ntapi/nt_tty.h>

#include <ntapi/ntapi.h>

#include "ntapi_impl.h"

#include "ntapi_pty.h"

static int32_t __stdcall __ntapi_pty_open_close(

	nt_pty *	pty,

	nt_iosb *	iosb,

	int32_t		opcode)

{

	int32_t		status;

	nt_pty_fd_msg	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;

	msg.data.fdinfo.hpty	= pty->hpty;

	msg.data.fdinfo.access	= pty->access;

	msg.data.fdinfo.flags	= pty->flags;

	msg.data.fdinfo.share	= pty->share;

	msg.data.fdinfo.options	= pty->options;

	msg.data.fdinfo.luid.high = pty->luid.high;

	msg.data.fdinfo.luid.low  = pty->luid.low;

	__ntapi_tt_guid_copy(

		&msg.data.fdinfo.guid,

		&pty->guid);

	if ((status = __ntapi->zw_request_wait_reply_port(pty->hport,&msg,&msg)))

		return status;

	else if (msg.data.ttyinfo.status)

		return msg.data.ttyinfo.status;

	pty->hpty	  = msg.data.fdinfo.hpty;

	pty->section	  = msg.data.fdinfo.section;

	pty->section_size = msg.data.fdinfo.section_size;

	pty->luid.high	  = msg.data.fdinfo.luid.high;

	pty->luid.low	  = msg.data.fdinfo.luid.low;

	iosb->status	  = msg.data.ttyinfo.status;

	iosb->info	  = 0;

	return NT_STATUS_SUCCESS;

}

static int32_t __fastcall __ntapi_pty_free(nt_pty * pty)

{

	void *	addr;

	size_t	size;

	/* unmap section */

	if (pty->section_addr)

		__ntapi->zw_unmap_view_of_section(

			NT_CURRENT_PROCESS_HANDLE,

			pty->section_addr);

	/* free control block */

	addr = pty->addr;

	size = pty->size;

	return __ntapi->zw_free_virtual_memory(

		NT_CURRENT_PROCESS_HANDLE,

		&addr,

		&size,

		NT_MEM_RELEASE);

}

static int32_t __fastcall __ntapi_pty_fail(nt_pty * pty,int32_t status)

{

	__ntapi_pty_free(pty);

	return status;

}

static int32_t __fastcall __ntapi_pty_alloc(nt_pty ** pty)

{

	int32_t		status;

	nt_pty *	ctx;

	size_t		ctx_size;

	/* allocate control block */

	ctx = 0;

	ctx_size = sizeof(nt_pty);

	if ((status = __ntapi->zw_allocate_virtual_memory(

			NT_CURRENT_PROCESS_HANDLE,

			(void **)&ctx,

			0,&ctx_size,

			NT_MEM_COMMIT,

			NT_PAGE_READWRITE)))

		return status;

	/* init control block */

	__ntapi->tt_aligned_block_memset(

		ctx,0,ctx_size);

	ctx->addr = ctx;

	ctx->size = ctx_size;

	*pty = ctx;

	return NT_STATUS_SUCCESS;

}

static int32_t __ntapi_pty_connect(

	void *		hport,

	nt_pty *	ctx,

	nt_iosb *	iosb)

{

	int32_t status;

	ctx->hport = hport

		? hport

		: __ntapi_internals()->hport_tty_session;

	/* request */

	iosb = iosb ? iosb : &ctx->iosb;

	if ((status = __ntapi_pty_open_close(ctx,iosb,NT_TTY_PTY_OPEN)))

		return __ntapi_pty_fail(ctx,status);

	/* map section */

	if ((status = __ntapi->zw_map_view_of_section(

			ctx->section,

			NT_CURRENT_PROCESS_HANDLE,

			&ctx->section_addr,

			0,ctx->section_size,

			0,&ctx->section_size,

			NT_VIEW_UNMAP,0,

			NT_PAGE_READWRITE)))

		return __ntapi_pty_fail(ctx,status);

	/* assume conforming clients, config for single lock try */

	__ntapi->tt_sync_block_init(&ctx->sync[__PTY_READ],0,0,1,0,0);

	__ntapi->tt_sync_block_init(&ctx->sync[__PTY_WRITE],0,0,1,0,0);

	return NT_STATUS_SUCCESS;

}

int32_t	__stdcall __ntapi_pty_open(

	void *			hport,

	nt_pty **		pty,

	uint32_t		desired_access,

	nt_object_attributes*	obj_attr,

	nt_iosb *		iosb,

	uint32_t		share_access,

	uint32_t		open_options)

{

	int32_t			status;

	uint32_t		hash;

	nt_guid			guid;

	nt_uuid_str_utf16 *	guid_str;

	nt_pty *		ctx;

	if (!obj_attr || !obj_attr->obj_name || !obj_attr->obj_name->buffer)

		return NT_STATUS_INVALID_PARAMETER;

	if (obj_attr->obj_name->strlen != __DEVICE_PATH_PREFIX_LEN + sizeof(nt_guid_str_utf16))

		return NT_STATUS_OBJECT_PATH_INVALID;

	hash = __ntapi->tt_buffer_crc32(

		0,

		obj_attr->obj_name->buffer,

		__DEVICE_PATH_PREFIX_LEN);

	if (hash != __DEVICE_PATH_PREFIX_HASH)

		return NT_STATUS_OBJECT_PATH_INVALID;

	guid_str = (nt_uuid_str_utf16 *)

		((uintptr_t)obj_attr->obj_name->buffer + __DEVICE_PATH_PREFIX_LEN);

	if (__ntapi->tt_utf16_string_to_guid(guid_str,&guid))

		return NT_STATUS_OBJECT_NAME_INVALID;

	/* control block */

	if ((status = __ntapi_pty_alloc(&ctx)))

		return status;

	__ntapi_tt_guid_copy(

		&ctx->guid,

		&guid);

	ctx->access	= desired_access;

	ctx->flags	= obj_attr->obj_attr;

	ctx->share	= share_access;

	ctx->options	= open_options;

	/* pts */

	if (obj_attr->root_dir) {

		ctx->luid.high = ((nt_pty *)obj_attr->root_dir)->luid.high;

		ctx->luid.low  = ((nt_pty *)obj_attr->root_dir)->luid.low;

	}

	if ((status = __ntapi_pty_connect(hport,ctx,iosb)))

		return status;

	*pty = ctx;

	return NT_STATUS_SUCCESS;

}

int32_t	__stdcall __ntapi_pty_inherit(

	__in	void *			hport,

	__out	nt_pty **		pty,

	__in 	nt_pty_client_info * 	client_info)

{

	int32_t 		status;

	nt_iosb 		iosb;

	nt_pty_inherit_info 	inherit;

	nt_pty *		ctx;

	inherit.any[0] = client_info->any[0];

	inherit.any[1] = client_info->any[1];

	inherit.any[2] = client_info->any[2];

	inherit.any[3] = client_info->any[3];

	if ((status = __ntapi_pty_query(

			hport,&iosb,

			&inherit,sizeof(inherit),

			NT_PTY_INHERIT_INFORMATION)))

		return status;

	/* control block */

	if ((status = __ntapi_pty_alloc(&ctx)))

		return status;

	__ntapi_tt_guid_copy(

		&ctx->guid,

		&inherit.guid);

	ctx->access	= inherit.access;

	ctx->flags	= inherit.flags;

	ctx->share	= inherit.share;

	ctx->options	= inherit.options;

	ctx->luid.low 	= inherit.luid.low;

	ctx->luid.high 	= inherit.luid.high;

	if ((status = __ntapi_pty_connect(hport,ctx,&iosb)))

		return status;

	*pty = ctx;

	return NT_STATUS_SUCCESS;

}

int32_t	__stdcall __ntapi_pty_reopen(

	__in	void *			hport,

	__in	nt_pty *		pty)

{

	return __ntapi_pty_connect(hport,pty,0);

}

int32_t __stdcall __ntapi_pty_close(nt_pty * pty)

{

	if (!pty || (pty->addr != pty))

		return NT_STATUS_INVALID_PARAMETER;

	__ntapi_pty_open_close(

		pty,&pty->iosb,NT_TTY_PTY_CLOSE);

	return __ntapi_pty_free(pty);

}