Blame src/port/ntapi_port_name_helper.c

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/********************************************************/
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/*  ntapi: Native API core library                      */
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/*  Copyright (C) 2013,2014,2015  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/nt_guid.h>
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#include <ntapi/nt_port.h>
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#include <ntapi/nt_string.h>
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#include "ntapi_impl.h"
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typedef wchar16_t __port_service_prefix[6];
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static const __port_service_prefix	__port_service_null = {0};
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static const __port_service_prefix	__port_service_prefixes[4][NT_PORT_TYPE_CAP][NT_PORT_SUBTYPE_CAP] = {
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					{{{'s','v','c','a','n','y'}}},
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					{{{'n','t','c','t','t','y'}}},
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					{{{'v','m','o','u','n','t'}}},
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					{{{'d','a','e','m','o','n'}}}};
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static const nt_guid		__port_guids[NT_PORT_TYPE_CAP][NT_PORT_SUBTYPE_CAP] = {
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					{NT_PORT_GUID_DEFAULT},
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					{NT_PORT_GUID_SUBSYSTEM},
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					{NT_PORT_GUID_VMOUNT},
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					{NT_PORT_GUID_DAEMON}};
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int32_t __stdcall __ntapi_tt_port_guid_from_type(
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	__out	nt_guid *		guid,
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	__in	nt_port_type		type,
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	__in	nt_port_subtype		subtype)
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{
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	const nt_guid *	src_guid;
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	if ((type >= NT_PORT_TYPE_CAP) || (subtype >= NT_PORT_SUBTYPE_CAP))
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		return NT_STATUS_INVALID_PARAMETER;
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	src_guid = &(__port_guids[type][subtype]);
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	__ntapi->tt_aligned_block_memcpy(
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		(uintptr_t *)guid,
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		(uintptr_t *)src_guid,
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		sizeof(nt_guid));
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	return NT_STATUS_SUCCESS;
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}
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int32_t __stdcall __ntapi_tt_port_type_from_guid(
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	__out	nt_port_type *		type,
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	__out	nt_port_subtype *	subtype,
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	__in	nt_guid *		guid)
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{
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	int		itype;
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	int		isubtype;
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	const nt_guid *	src_guid;
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	uint32_t	guid_hash;
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	uint32_t	src_hash;
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	guid_hash = __ntapi->tt_buffer_crc32(0,guid,sizeof(nt_guid));
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	for (itype=0; itype
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		for (isubtype=0; isubtype
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			src_guid = &(__port_guids[itype][isubtype]);
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			src_hash = __ntapi->tt_buffer_crc32(0,src_guid,sizeof(nt_guid));
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			if (guid_hash == src_hash) {
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				*type	 = (nt_port_type)itype;
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				*subtype = (nt_port_subtype)isubtype;
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				return NT_STATUS_SUCCESS;
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			}
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		}
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	}
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	return NT_STATUS_INVALID_PARAMETER;
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}
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int32_t __stdcall __ntapi_tt_port_generate_keys(
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	__out	nt_port_keys *		keys)
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{
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	int32_t			status;
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	nt_large_integer	systime;
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	nt_luid			luid;
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	status = __ntapi->zw_query_system_time(&systime);
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	if (status) return status;
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	status = __ntapi->zw_allocate_locally_unique_id(&luid);
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	if (status) return status;
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	keys->key[0] = pe_get_current_process_id();
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	keys->key[1] = pe_get_current_thread_id();
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	keys->key[2] = systime.ihigh;
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	keys->key[3] = systime.ulow;
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	keys->key[4] = luid.high;
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	keys->key[5] = luid.low;
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	return NT_STATUS_SUCCESS;
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}
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void __stdcall	__ntapi_tt_port_format_keys(
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	__in	nt_port_keys *		keys,
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	__out	nt_port_name_keys *	name_keys)
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{
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	__ntapi->tt_uint32_to_hex_utf16(keys->key[0],name_keys->key_1st);
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	__ntapi->tt_uint32_to_hex_utf16(keys->key[1],name_keys->key_2nd);
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	__ntapi->tt_uint32_to_hex_utf16(keys->key[2],name_keys->key_3rd);
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	__ntapi->tt_uint32_to_hex_utf16(keys->key[3],name_keys->key_4th);
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	__ntapi->tt_uint32_to_hex_utf16(keys->key[4],name_keys->key_5th);
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	__ntapi->tt_uint32_to_hex_utf16(keys->key[5],name_keys->key_6th);
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	return;
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}
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void __stdcall __ntapi_tt_port_name_from_attributes(
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	__out	nt_port_name *		name,
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	__in	nt_port_attr *		attr)
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{
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	wchar16_t bno[] = __NT_BASED_NAMED_OBJECTS;
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	/* base named objects */
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	__ntapi->tt_memcpy_utf16(
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		name->base_named_objects,
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		bno,sizeof(bno));
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	/* service prefix */
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	if (attr && (attr->type < NT_PORT_TYPE_CAP) && (attr->subtype < NT_PORT_SUBTYPE_CAP))
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		__ntapi->tt_memcpy_utf16(
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			name->svc_prefix,
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			&(__port_service_prefixes[attr->type][attr->subtype][0][0]),
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			sizeof(name->svc_prefix));
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	else
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		__ntapi->tt_memcpy_utf16(
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			name->svc_prefix,
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			__port_service_null,
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			sizeof(name->svc_prefix));
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	/* port guid */
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	__ntapi->tt_guid_to_utf16_string(
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		&attr->guid,
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		(nt_guid_str_utf16 *)&name->port_guid);
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	/* port name keys */
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	__ntapi_tt_port_format_keys(
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		&attr->keys,
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		&name->port_name_keys);
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	/* backslash and underscores */
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	name->backslash = '\\';
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	name->port_guid.uscore_guid = '_';
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	name->port_guid.uscore_keys = '_';
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	name->port_name_keys.uscore_1st  = '_';
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	name->port_name_keys.uscore_2nd  = '_';
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	name->port_name_keys.uscore_3rd  = '_';
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	name->port_name_keys.uscore_4th  = '_';
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	name->port_name_keys.uscore_5th  = '_';
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	/* null termination */
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	name->null_termination = 0;
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	return;
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}