From d9d1789535a1ef6b0bc6dde9fba721ac923fe86c Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Sun, 30 Jul 2017 21:21:21 +0000
Subject: subsystem interfaces: integrated extended port name helper functions.

---
 src/port/ntapi_port_name_helper.c | 144 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)

(limited to 'src/port')

diff --git a/src/port/ntapi_port_name_helper.c b/src/port/ntapi_port_name_helper.c
index e55ffba..ae36c86 100644
--- a/src/port/ntapi_port_name_helper.c
+++ b/src/port/ntapi_port_name_helper.c
@@ -167,3 +167,147 @@ void __stdcall __ntapi_tt_port_name_from_attributes(
 
 	return;
 }
+
+
+static int32_t __tt_port_attr_from_name(
+	__out	nt_port_attr *		attr,
+	__in	const nt_port_name *	name)
+{
+	int		i;
+	int		type;
+	int32_t		status;
+	const wchar16_t bno[] = __NT_BASED_NAMED_OBJECTS;
+
+	/* base named objects */
+	if (__ntapi->tt_strncmp_utf16(
+			name->base_named_objects,
+			bno,sizeof(bno)))
+		return NT_STATUS_INVALID_PARAMETER;
+
+	/* service prefix */
+	for (i=0, type=-1; i<NT_PORT_TYPE_CAP && type<0; i++)
+		if (!(__ntapi->tt_strncmp_utf16(
+				name->svc_prefix,
+				__port_service_prefixes[i][0],
+				sizeof(__port_service_prefix))))
+			type = i;
+
+	if (type < 0)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	/* port guid */
+	if ((status = __ntapi->tt_string_to_guid_utf16(
+			(nt_guid_str_utf16 *)&name->port_guid,
+			&attr->guid)))
+		return status;
+
+	/* port keys */
+	if ((status = __ntapi->tt_hex_utf16_to_uint32(
+			name->port_name_keys.key_1st,
+			&attr->keys.key[0])))
+		return status;
+
+	if ((status = __ntapi->tt_hex_utf16_to_uint32(
+			name->port_name_keys.key_2nd,
+			&attr->keys.key[1])))
+		return status;
+
+	if ((status = __ntapi->tt_hex_utf16_to_uint32(
+			name->port_name_keys.key_3rd,
+			&attr->keys.key[2])))
+		return status;
+
+	if ((status = __ntapi->tt_hex_utf16_to_uint32(
+			name->port_name_keys.key_4th,
+			&attr->keys.key[3])))
+		return status;
+
+	if ((status = __ntapi->tt_hex_utf16_to_uint32(
+			name->port_name_keys.key_5th,
+			&attr->keys.key[4])))
+		return status;
+
+	if ((status = __ntapi->tt_hex_utf16_to_uint32(
+			name->port_name_keys.key_6th,
+			&attr->keys.key[5])))
+		return status;
+
+	/* backslash and underscores */
+	if (name->backslash != '\\')
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (name->port_name_keys.uscore_1st != '_')
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (name->port_name_keys.uscore_2nd != '_')
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (name->port_name_keys.uscore_3rd != '_')
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (name->port_name_keys.uscore_4th != '_')
+		return NT_STATUS_INVALID_PARAMETER;
+
+	if (name->port_name_keys.uscore_5th != '_')
+		return NT_STATUS_INVALID_PARAMETER;
+
+	/* unknown defaults */
+	attr->ver_major = 0;
+	attr->ver_minor = 0;
+	attr->options   = 0;
+	attr->flags     = 0;
+
+	/* all done */
+	return NT_STATUS_SUCCESS;
+}
+
+
+int32_t __stdcall __ntapi_tt_port_attr_from_name(
+	__out	nt_port_attr *		attr,
+	__in	const nt_port_name *	name)
+{
+	/* null termination */
+	if (name->null_termination)
+		return NT_STATUS_INVALID_PARAMETER;
+
+	return __tt_port_attr_from_name(
+		attr,name);
+}
+
+
+int32_t __stdcall __ntapi_tt_port_attr_from_string(
+	__out	nt_port_attr *			attr,
+	__in	const nt_unicode_string *	str)
+{
+	if (str->strlen != ((size_t)&(((nt_port_name *)0)->null_termination)))
+		return NT_STATUS_INVALID_PARAMETER;
+
+	return __tt_port_attr_from_name(
+		attr,(const nt_port_name *)str->buffer);
+}
+
+
+int32_t __stdcall __ntapi_tt_port_attr_from_symlink(
+	__out	nt_port_attr *	attr,
+	__in	void *		symlink)
+{
+	int32_t			status;
+	size_t			size;
+	nt_unicode_string *	target;
+	uintptr_t		buffer[512/sizeof(uintptr_t)];
+
+	target         = (nt_unicode_string *)buffer;
+	target->strlen = 0;
+	target->maxlen = sizeof(buffer) - sizeof(nt_unicode_string);
+	target->buffer = (wchar16_t *)&target[1];
+
+	if ((status = __ntapi->zw_query_symbolic_link_object(
+			symlink,target,&size)))
+		return status;
+
+	if (target->strlen != ((size_t)&(((nt_port_name *)0)->null_termination)))
+		return NT_STATUS_INVALID_PARAMETER;
+
+	return __tt_port_attr_from_name(
+		attr,(const nt_port_name *)target->buffer);
+}
-- 
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