Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 227 insertions, 0 deletions

diff --git a/epan/guid-utils.c b/epan/guid-utils.c
new file mode 100644
index 00000000..2e99085a
--- /dev/null
+++ b/epan/guid-utils.c
@@ -0,0 +1,227 @@
+/* guid-utils.c
+ * GUID handling
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ *
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <glib.h>
+#include <epan/epan.h>
+#include <wsutil/unicode-utils.h>
+#include <epan/wmem_scopes.h>
+#include "guid-utils.h"
+
+#ifdef _WIN32
+#include <tchar.h>
+#include <windows.h>
+#include <strsafe.h>
+#endif
+
+static wmem_tree_t *guid_to_name_tree = NULL;
+
+
+#ifdef _WIN32
+/* try to resolve an DCE/RPC interface name to its name using the Windows registry entries */
+/* XXX - might be better to fill all interfaces into our database at startup instead of searching each time */
+static int
+ResolveWin32UUID(e_guid_t if_id, char *uuid_name, int uuid_name_max_len)
+{
+	TCHAR *reg_uuid_name;
+	HKEY hKey = NULL;
+	DWORD uuid_max_size = MAX_PATH;
+	TCHAR *reg_uuid_str;
+
+	reg_uuid_name=wmem_alloc(NULL, (MAX_PATH*sizeof(TCHAR))+1);
+	reg_uuid_str=wmem_alloc(NULL, (MAX_PATH*sizeof(TCHAR))+1);
+
+	if(uuid_name_max_len < 2){
+		return 0;
+	}
+	reg_uuid_name[0] = '\0';
+	StringCchPrintf(reg_uuid_str, MAX_PATH, _T("SOFTWARE\\Classes\\Interface\\{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}"),
+			if_id.data1, if_id.data2, if_id.data3,
+			if_id.data4[0], if_id.data4[1],
+			if_id.data4[2], if_id.data4[3],
+			if_id.data4[4], if_id.data4[5],
+			if_id.data4[6], if_id.data4[7]);
+	if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, reg_uuid_str, 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
+		if (RegQueryValueEx(hKey, NULL, NULL, NULL, (LPBYTE)reg_uuid_name, &uuid_max_size) == ERROR_SUCCESS && uuid_max_size <= MAX_PATH) {
+			snprintf(uuid_name, uuid_name_max_len, "%s", utf_16to8(reg_uuid_name));
+			RegCloseKey(hKey);
+			wmem_free(NULL, reg_uuid_name);
+			wmem_free(NULL, reg_uuid_str);
+			return (int) strlen(uuid_name);
+		}
+		RegCloseKey(hKey);
+	}
+	wmem_free(NULL, reg_uuid_name);
+	wmem_free(NULL, reg_uuid_str);
+	return 0; /* we didn't find anything anyhow. Please don't use the string! */
+
+}
+#endif
+
+
+/* store a guid to name mapping */
+void
+guids_add_guid(const e_guid_t *guid, const gchar *name)
+{
+	wmem_tree_key_t guidkey[2];
+	guint32 g[4];
+
+	g[0]=guid->data1;
+
+	g[1]=guid->data2;
+	g[1]<<=16;
+	g[1]|=guid->data3;
+
+	g[2]=guid->data4[0];
+	g[2]<<=8;
+	g[2]|=guid->data4[1];
+	g[2]<<=8;
+	g[2]|=guid->data4[2];
+	g[2]<<=8;
+	g[2]|=guid->data4[3];
+
+	g[3]=guid->data4[4];
+	g[3]<<=8;
+	g[3]|=guid->data4[5];
+	g[3]<<=8;
+	g[3]|=guid->data4[6];
+	g[3]<<=8;
+	g[3]|=guid->data4[7];
+
+	guidkey[0].key=g;
+	guidkey[0].length=4;
+	guidkey[1].length=0;
+
+	wmem_tree_insert32_array(guid_to_name_tree, &guidkey[0], (gchar *) name);
+}
+
+
+/* retrieve the registered name for this GUID; uses the scope for the fallback case only */
+const gchar *
+guids_get_guid_name(const e_guid_t *guid, wmem_allocator_t *scope _U_)
+{
+	wmem_tree_key_t guidkey[2];
+	guint32 g[4];
+	char *name;
+#ifdef _WIN32
+	static char *uuid_name;
+#endif
+
+	g[0]=guid->data1;
+
+	g[1]=guid->data2;
+	g[1]<<=16;
+	g[1]|=guid->data3;
+
+	g[2]=guid->data4[0];
+	g[2]<<=8;
+	g[2]|=guid->data4[1];
+	g[2]<<=8;
+	g[2]|=guid->data4[2];
+	g[2]<<=8;
+	g[2]|=guid->data4[3];
+
+	g[3]=guid->data4[4];
+	g[3]<<=8;
+	g[3]|=guid->data4[5];
+	g[3]<<=8;
+	g[3]|=guid->data4[6];
+	g[3]<<=8;
+	g[3]|=guid->data4[7];
+
+	guidkey[0].key=g;
+	guidkey[0].length=4;
+	guidkey[1].length=0;
+
+	if((name = (char *)wmem_tree_lookup32_array(guid_to_name_tree, &guidkey[0]))){
+		return name;
+	}
+
+#ifdef _WIN32
+	/* try to resolve the mapping from the Windows registry */
+	/* XXX - prefill the resolving database with all the Windows registry entries once at init only (instead of searching each time)? */
+	uuid_name=wmem_alloc(scope, 128);
+	if(ResolveWin32UUID(*guid, uuid_name, 128)) {
+		return uuid_name;
+	}
+#endif
+
+	return NULL;
+}
+
+
+void
+guids_init(void)
+{
+	guid_to_name_tree=wmem_tree_new(wmem_epan_scope());
+	/* XXX here is a good place to read a config file with wellknown guids */
+}
+
+
+/* Tries to match a guid against its name.
+   Returns the associated string ptr on a match.
+   Formats uuid number and returns the resulting string via wmem scope, if name is unknown.
+   (derived from val_to_str) */
+const gchar *
+guids_resolve_guid_to_str(const e_guid_t *guid, wmem_allocator_t *scope)
+{
+	const gchar *name;
+
+	name=guids_get_guid_name(guid, scope);
+	if(name){
+		return name;
+	}
+
+	return wmem_strdup_printf(scope, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+				guid->data1, guid->data2, guid->data3,
+				guid->data4[0], guid->data4[1],
+				guid->data4[2], guid->data4[3],
+				guid->data4[4], guid->data4[5],
+				guid->data4[6], guid->data4[7]);
+}
+
+int guid_cmp(const e_guid_t *g1, const e_guid_t *g2)
+{
+	if (g1->data1 != g2->data1) {
+		return (g1->data1 < g2->data1) ? -1 : 1;
+	}
+
+	if (g1->data2 != g2->data2) {
+		return (g1->data2 < g2->data2) ? -1 : 1;
+	}
+
+	if (g1->data3 != g2->data3) {
+		return (g1->data3 < g2->data3) ? -1 : 1;
+	}
+
+	return memcmp(&g1->data4[0], &g2->data4[0], 8);
+}
+
+guint guid_hash(const e_guid_t *guid)
+{
+	return g_int64_hash((const gint64 *)guid);
+}
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */