210 lines
5 KiB
C
210 lines
5 KiB
C
/* guid-utils.c
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* GUID handling
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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*
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <glib.h>
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#include <epan/epan.h>
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#include <epan/unicode-utils.h>
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#include <epan/emem.h>
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#include "guid-utils.h"
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#ifdef _WIN32
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#include <tchar.h>
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#include <windows.h>
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#endif
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static emem_tree_t *guid_to_name_tree = NULL;
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#ifdef _WIN32
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/* try to resolve an DCE/RPC interface name to it's name using the Windows registry entries */
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/* XXX - might be better to fill all interfaces into our database at startup instead of searching each time */
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int
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ResolveWin32UUID(e_guid_t if_id, char *uuid_name, int uuid_name_max_len)
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{
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TCHAR *reg_uuid_name;
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HKEY hKey = NULL;
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DWORD uuid_max_size = MAX_PATH;
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TCHAR *reg_uuid_str;
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reg_uuid_name=ep_alloc(MAX_PATH*sizeof(TCHAR));
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reg_uuid_str=ep_alloc(MAX_PATH*sizeof(TCHAR));
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if(uuid_name_max_len < 2){
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return 0;
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}
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reg_uuid_name[0] = '\0';
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_snwprintf(reg_uuid_str, MAX_PATH, _T("SOFTWARE\\Classes\\Interface\\{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}"),
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if_id.data1, if_id.data2, if_id.data3,
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if_id.data4[0], if_id.data4[1],
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if_id.data4[2], if_id.data4[3],
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if_id.data4[4], if_id.data4[5],
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if_id.data4[6], if_id.data4[7]);
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if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, reg_uuid_str, 0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS) {
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if (RegQueryValueEx(hKey, NULL, NULL, NULL, (LPBYTE)reg_uuid_name, &uuid_max_size) == ERROR_SUCCESS && uuid_max_size <= MAX_PATH) {
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g_snprintf(uuid_name, uuid_name_max_len, "%s", utf_16to8(reg_uuid_name));
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RegCloseKey(hKey);
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return strlen(uuid_name);
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}
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RegCloseKey(hKey);
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}
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return 0; /* we didn't find anything anyhow. Please don't use the string! */
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}
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#endif
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/* store a guid to name mapping */
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void
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guids_add_guid(e_guid_t *guid, const gchar *name)
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{
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emem_tree_key_t guidkey[2];
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guint32 g[4];
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g[0]=guid->data1;
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g[1]=guid->data2;
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g[1]<<=16;
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g[1]|=guid->data3;
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g[2]=guid->data4[0];
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g[2]<<=8;
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g[2]|=guid->data4[1];
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g[2]<<=8;
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g[2]|=guid->data4[2];
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g[2]<<=8;
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g[2]|=guid->data4[3];
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g[3]=guid->data4[4];
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g[3]<<=8;
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g[3]|=guid->data4[5];
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g[3]<<=8;
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g[3]|=guid->data4[6];
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g[3]<<=8;
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g[3]|=guid->data4[7];
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guidkey[0].key=g;
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guidkey[0].length=4;
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guidkey[1].length=0;
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pe_tree_insert32_array(guid_to_name_tree, &guidkey[0], (gchar *) name);
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}
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/* retreive the registered name for this GUID */
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const gchar *
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guids_get_guid_name(e_guid_t *guid)
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{
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emem_tree_key_t guidkey[2];
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guint32 g[4];
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char *name;
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#ifdef _WIN32
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static char *uuid_name;
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#endif
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g[0]=guid->data1;
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g[1]=guid->data2;
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g[1]<<=16;
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g[1]|=guid->data3;
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g[2]=guid->data4[0];
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g[2]<<=8;
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g[2]|=guid->data4[1];
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g[2]<<=8;
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g[2]|=guid->data4[2];
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g[2]<<=8;
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g[2]|=guid->data4[3];
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g[3]=guid->data4[4];
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g[3]<<=8;
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g[3]|=guid->data4[5];
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g[3]<<=8;
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g[3]|=guid->data4[6];
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g[3]<<=8;
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g[3]|=guid->data4[7];
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guidkey[0].key=g;
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guidkey[0].length=4;
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guidkey[1].length=0;
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if((name = pe_tree_lookup32_array(guid_to_name_tree, &guidkey[0]))){
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return name;
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}
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#ifdef _WIN32
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/* try to resolve the mapping from the Windows registry */
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/* XXX - prefill the resolving database with all the Windows registry entries once at init only (instead of searching each time)? */
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uuid_name=ep_alloc(128);
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if(ResolveWin32UUID(*guid, uuid_name, 128)) {
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return uuid_name;
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}
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#endif
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return NULL;
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}
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void
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guids_init(void)
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{
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guid_to_name_tree=pe_tree_create(EMEM_TREE_TYPE_RED_BLACK, "guid_to_name");
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/* XXX here is a good place to read a config file with wellknown guids */
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}
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/* Tries to match a guid against its name.
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Returns the associated string ptr on a match.
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Formats uuid number and returns the resulting string, if name is unknown.
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(derived from val_to_str) */
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const gchar *
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guids_resolve_guid_to_str(e_guid_t *guid)
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{
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const gchar *name;
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gchar *namebuf;
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name=guids_get_guid_name(guid);
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if(name){
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return name;
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}
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namebuf=ep_alloc(64);
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g_snprintf(namebuf, 64, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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guid->data1, guid->data2, guid->data3,
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guid->data4[0], guid->data4[1],
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guid->data4[2], guid->data4[3],
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guid->data4[4], guid->data4[5],
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guid->data4[6], guid->data4[7]);
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return namebuf;
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}
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