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capture_win_ifnames.c
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capture_win_ifnames.c
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/* capture_win_ifnames.c
* Routines supporting the use of Windows friendly interface names
* Copyright 2011-2012, Mike Garratt <wireshark@evn.co.nz>
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Modfied by Tim Dorssers
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef _WIN32
#include <winsock2.h>
#include <windows.h>
#include <iphlpapi.h>
#include <stdio.h>
#include <stdlib.h>
#include <ntddndis.h>
#ifndef NDIS_IF_MAX_STRING_SIZE
#define NDIS_IF_MAX_STRING_SIZE IF_MAX_STRING_SIZE /* =256 in <ifdef.h> */
#endif
#ifndef NETIO_STATUS
#define NETIO_STATUS DWORD
#endif
#include "capture_win_ifnames.h"
static int gethexdigit(const char *p)
{
if(*p >= '0' && *p <= '9'){
return *p - '0';
}else if(*p >= 'A' && *p <= 'F'){
return *p - 'A' + 0xA;
}else if(*p >= 'a' && *p <= 'f'){
return *p - 'a' + 0xa;
}else{
return -1; /* Not a hex digit */
}
}
static boolean get8hexdigits(const char *p, DWORD *d)
{
int digit;
DWORD val;
int i;
val = 0;
for(i = 0; i < 8; i++){
digit = gethexdigit(p++);
if(digit == -1){
return FALSE; /* Not a hex digit */
}
val = (val << 4) | digit;
}
*d = val;
return TRUE;
}
static boolean get4hexdigits(const char *p, WORD *w)
{
int digit;
WORD val;
int i;
val = 0;
for(i = 0; i < 4; i++){
digit = gethexdigit(p++);
if(digit == -1){
return FALSE; /* Not a hex digit */
}
val = (val << 4) | digit;
}
*w = val;
return TRUE;
}
/*
* If a string is a GUID in {}, fill in a GUID structure with the GUID
* value and return TRUE; otherwise, if the string is not a valid GUID
* in {}, return FALSE.
*/
boolean
parse_as_guid(const char *guid_text, GUID *guid)
{
int i;
int digit1, digit2;
if(*guid_text != '{'){
return FALSE; /* Nope, not enclosed in {} */
}
guid_text++;
/* There must be 8 hex digits; if so, they go into guid->Data1 */
if(!get8hexdigits(guid_text, &guid->Data1)){
return FALSE; /* nope, not 8 hex digits */
}
guid_text += 8;
/* Now there must be a hyphen */
if(*guid_text != '-'){
return FALSE; /* Nope */
}
guid_text++;
/* There must be 4 hex digits; if so, they go into guid->Data2 */
if(!get4hexdigits(guid_text, &guid->Data2)){
return FALSE; /* nope, not 4 hex digits */
}
guid_text += 4;
/* Now there must be a hyphen */
if(*guid_text != '-'){
return FALSE; /* Nope */
}
guid_text++;
/* There must be 4 hex digits; if so, they go into guid->Data3 */
if(!get4hexdigits(guid_text, &guid->Data3)){
return FALSE; /* nope, not 4 hex digits */
}
guid_text += 4;
/* Now there must be a hyphen */
if(*guid_text != '-'){
return FALSE; /* Nope */
}
guid_text++;
/*
* There must be 4 hex digits; if so, they go into the first 2 bytes
* of guid->Data4.
*/
for(i = 0; i < 2; i++){
digit1 = gethexdigit(guid_text);
if(digit1 == -1){
return FALSE; /* Not a hex digit */
}
guid_text++;
digit2 = gethexdigit(guid_text);
if(digit2 == -1){
return FALSE; /* Not a hex digit */
}
guid_text++;
guid->Data4[i] = (digit1 << 4)|(digit2);
}
/* Now there must be a hyphen */
if(*guid_text != '-'){
return FALSE; /* Nope */
}
guid_text++;
/*
* There must be 12 hex digits; if so,t hey go into the next 6 bytes
* of guid->Data4.
*/
for(i = 0; i < 6; i++){
digit1 = gethexdigit(guid_text);
if(digit1 == -1){
return FALSE; /* Not a hex digit */
}
guid_text++;
digit2 = gethexdigit(guid_text);
if(digit2 == -1){
return FALSE; /* Not a hex digit */
}
guid_text++;
guid->Data4[i+2] = (digit1 << 4)|(digit2);
}
/* Now there must be a closing } */
if(*guid_text != '}'){
return FALSE; /* Nope */
}
guid_text++;
/* And that must be the end of the string */
if(*guid_text != '\0'){
return FALSE; /* Nope */
}
return TRUE;
}
/**********************************************************************************/
boolean IsWindowsVistaOrLater()
{
#if (_MSC_VER >= 1800)
/*
* On VS2103, GetVersionEx is deprecated. Microsoft recommend to
* use VerifyVersionInfo instead
*/
OSVERSIONINFOEX osvi;
DWORDLONG dwlConditionMask = 0;
int op = VER_GREATER_EQUAL;
SecureZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
osvi.dwMajorVersion = 6;
VER_SET_CONDITION(dwlConditionMask, VER_MAJORVERSION, op);
return VerifyVersionInfo(&osvi, VER_MAJORVERSION, dwlConditionMask);
#else
OSVERSIONINFO osvi;
SecureZeroMemory(&osvi, sizeof(OSVERSIONINFO));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if(GetVersionEx(&osvi)){
return osvi.dwMajorVersion >= 6;
}
return FALSE;
#endif
}
/**********************************************************************************/
/* Get the friendly name for the given GUID */
char *
get_interface_friendly_name_from_device_guid(__in GUID *guid)
{
HMODULE hIPHlpApi;
HRESULT status;
WCHAR wName[NDIS_IF_MAX_STRING_SIZE + 1];
HRESULT hr;
boolean fallbackToUnpublishedApi=TRUE;
boolean haveInterfaceFriendlyName=FALSE;
int size;
char *name;
/* Load the ip helper api DLL */
hIPHlpApi = LoadLibrary(TEXT("iphlpapi.dll"));
if (hIPHlpApi == NULL) {
/* Load failed - DLL should always be available in XP+*/
return NULL;
}
/* Need to convert an Interface GUID to the interface friendly name (e.g. "Local Area Connection")
* The functions required to do this all reside within iphlpapi.dll
* - The preferred approach is to use published API functions (Available since Windows Vista)
* - We do however fallback to trying undocumented API if the published API is not available (Windows XP/2k3 scenario)
*/
if(IsWindowsVistaOrLater()){
/* Published API function prototypes (for Windows Vista/Windows Server 2008+) */
typedef NETIO_STATUS (WINAPI *ProcAddr_CIG2L) (__in CONST GUID *InterfaceGuid, __out PNET_LUID InterfaceLuid);
typedef NETIO_STATUS (WINAPI *ProcAddr_CIL2A) ( __in CONST NET_LUID *InterfaceLuid,__out_ecount(Length) PWSTR InterfaceAlias, __in SIZE_T Length);
/* Attempt to do the conversion using Published API functions */
ProcAddr_CIG2L proc_ConvertInterfaceGuidToLuid=(ProcAddr_CIG2L) GetProcAddress(hIPHlpApi, "ConvertInterfaceGuidToLuid");
if(proc_ConvertInterfaceGuidToLuid!=NULL){
ProcAddr_CIL2A Proc_ConvertInterfaceLuidToAlias=(ProcAddr_CIL2A) GetProcAddress(hIPHlpApi, "ConvertInterfaceLuidToAlias");
if(Proc_ConvertInterfaceLuidToAlias!=NULL){
/* we have our functions ready to go, attempt to convert interface guid->luid->friendlyname */
NET_LUID InterfaceLuid;
hr = proc_ConvertInterfaceGuidToLuid(guid, &InterfaceLuid);
if(hr==NO_ERROR){
/* guid->luid success */
hr = Proc_ConvertInterfaceLuidToAlias(&InterfaceLuid, wName, NDIS_IF_MAX_STRING_SIZE+1);
if(hr==NO_ERROR){
/* luid->friendly name success */
haveInterfaceFriendlyName=TRUE; /* success */
}else{
/* luid->friendly name failed */
fallbackToUnpublishedApi=FALSE;
}
}else{
fallbackToUnpublishedApi=FALSE;
}
}
}
}
if(fallbackToUnpublishedApi && !haveInterfaceFriendlyName){
/* Didn't manage to get the friendly name using published api functions
* (most likely cause wireshark is running on Windows XP/Server 2003)
* Retry using nhGetInterfaceNameFromGuid (an older unpublished API function) */
typedef HRESULT (WINAPI *ProcAddr_nhGINFG) (__in GUID *InterfaceGuid, __out PCWSTR InterfaceAlias, __inout DWORD *LengthAddress, wchar_t *a4, wchar_t *a5);
ProcAddr_nhGINFG Proc_nhGetInterfaceNameFromGuid = NULL;
Proc_nhGetInterfaceNameFromGuid = (ProcAddr_nhGINFG) GetProcAddress(hIPHlpApi, "NhGetInterfaceNameFromGuid");
if (Proc_nhGetInterfaceNameFromGuid!= NULL) {
wchar_t *p4=NULL, *p5=NULL;
DWORD NameSize;
/* testing of nhGetInterfaceNameFromGuid indicates the unpublished API function expects the 3rd parameter
* to be the available space in bytes (as compared to wchar's) available in the second parameter buffer
* to receive the friendly name (in unicode format) including the space for the nul termination.*/
NameSize = sizeof(wName);
/* do the guid->friendlyname lookup */
status = Proc_nhGetInterfaceNameFromGuid(guid, wName, &NameSize, p4, p5);
if(status==0){
haveInterfaceFriendlyName=TRUE; /* success */
}
}
}
/* we have finished with iphlpapi.dll - release it */
FreeLibrary(hIPHlpApi);
if(!haveInterfaceFriendlyName){
/* failed to get the friendly name, nothing further to do */
return NULL;
}
/* Get the required buffer size, and then convert the string
* from UTF-16 to UTF-8. */
size=WideCharToMultiByte(CP_UTF8, 0, wName, -1, NULL, 0, NULL, NULL);
name=(char *) malloc(size);
if (name == NULL){
return NULL;
}
size=WideCharToMultiByte(CP_UTF8, 0, wName, -1, name, size, NULL, NULL);
if(size==0){
/* bytes written == 0, indicating some form of error*/
free(name);
return NULL;
}
return name;
}
/*
* Given an interface name, try to extract the GUID from it and parse it.
* If that fails, return NULL; if that succeeds, attempt to get the
* friendly name for the interface in question. If that fails, return
* NULL, otherwise return the friendly name, allocated with g_malloc()
* (so that it must be freed with g_free()).
*/
char *
get_windows_interface_friendly_name(const char *interface_devicename)
{
const char* guid_text;
GUID guid;
/* Extract the guid text from the interface device name */
if(strncmp("\\Device\\NPF_", interface_devicename, 12)==0){
guid_text=interface_devicename+12; /* skip over the '\Device\NPF_' prefix, assume the rest is the guid text */
}else{
guid_text=interface_devicename;
}
if (!parse_as_guid(guid_text, &guid)){
return NULL; /* not a GUID, so no friendly name */
}
/* guid okay, get the interface friendly name associated with the guid */
return get_interface_friendly_name_from_device_guid(&guid);
}
/**************************************************************************************/
#endif