forked from osmocom/wireshark
![Guy Harris](/assets/img/avatar_default.png)
Change all wireshark.org URLs to use https. Fix some broken links while we're at it. Change-Id: I161bf8eeca43b8027605acea666032da86f5ea1c Reviewed-on: https://code.wireshark.org/review/34089 Reviewed-by: Guy Harris <guy@alum.mit.edu>
272 lines
7.2 KiB
C
272 lines
7.2 KiB
C
/* capture_win_ifnames.c
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* Routines supporting the use of Windows friendly interface names within Wireshark
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* Copyright 2011-2012, Mike Garratt <wireshark@evn.co.nz>
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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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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#ifdef _WIN32
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#include <winsock2.h>
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#include <windows.h>
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#include <iphlpapi.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <glib.h>
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#include <ntddndis.h>
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#ifndef NDIS_IF_MAX_STRING_SIZE
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#define NDIS_IF_MAX_STRING_SIZE IF_MAX_STRING_SIZE /* =256 in <ifdef.h> */
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#endif
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#ifndef NETIO_STATUS
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#define NETIO_STATUS DWORD
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#endif
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#include "log.h"
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#include "caputils/capture_ifinfo.h"
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#include "caputils/capture_win_ifnames.h"
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#include <wsutil/file_util.h>
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static int gethexdigit(const char *p)
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{
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if(*p >= '0' && *p <= '9'){
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return *p - '0';
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}else if(*p >= 'A' && *p <= 'F'){
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return *p - 'A' + 0xA;
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}else if(*p >= 'a' && *p <= 'f'){
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return *p - 'a' + 0xa;
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}else{
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return -1; /* Not a hex digit */
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}
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}
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static gboolean get8hexdigits(const char *p, DWORD *d)
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{
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int digit;
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DWORD val;
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int i;
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val = 0;
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for(i = 0; i < 8; i++){
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digit = gethexdigit(p++);
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if(digit == -1){
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return FALSE; /* Not a hex digit */
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}
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val = (val << 4) | digit;
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}
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*d = val;
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return TRUE;
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}
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static gboolean get4hexdigits(const char *p, WORD *w)
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{
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int digit;
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WORD val;
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int i;
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val = 0;
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for(i = 0; i < 4; i++){
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digit = gethexdigit(p++);
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if(digit == -1){
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return FALSE; /* Not a hex digit */
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}
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val = (val << 4) | digit;
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}
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*w = val;
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return TRUE;
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}
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/*
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* If a string is a GUID in {}, fill in a GUID structure with the GUID
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* value and return TRUE; otherwise, if the string is not a valid GUID
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* in {}, return FALSE.
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*/
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gboolean
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parse_as_guid(const char *guid_text, GUID *guid)
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{
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int i;
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int digit1, digit2;
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if(*guid_text != '{'){
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return FALSE; /* Nope, not enclosed in {} */
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}
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guid_text++;
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/* There must be 8 hex digits; if so, they go into guid->Data1 */
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if(!get8hexdigits(guid_text, &guid->Data1)){
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return FALSE; /* nope, not 8 hex digits */
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}
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guid_text += 8;
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/* Now there must be a hyphen */
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if(*guid_text != '-'){
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return FALSE; /* Nope */
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}
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guid_text++;
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/* There must be 4 hex digits; if so, they go into guid->Data2 */
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if(!get4hexdigits(guid_text, &guid->Data2)){
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return FALSE; /* nope, not 4 hex digits */
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}
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guid_text += 4;
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/* Now there must be a hyphen */
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if(*guid_text != '-'){
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return FALSE; /* Nope */
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}
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guid_text++;
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/* There must be 4 hex digits; if so, they go into guid->Data3 */
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if(!get4hexdigits(guid_text, &guid->Data3)){
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return FALSE; /* nope, not 4 hex digits */
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}
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guid_text += 4;
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/* Now there must be a hyphen */
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if(*guid_text != '-'){
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return FALSE; /* Nope */
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}
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guid_text++;
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/*
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* There must be 4 hex digits; if so, they go into the first 2 bytes
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* of guid->Data4.
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*/
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for(i = 0; i < 2; i++){
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digit1 = gethexdigit(guid_text);
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if(digit1 == -1){
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return FALSE; /* Not a hex digit */
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}
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guid_text++;
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digit2 = gethexdigit(guid_text);
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if(digit2 == -1){
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return FALSE; /* Not a hex digit */
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}
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guid_text++;
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guid->Data4[i] = (digit1 << 4)|(digit2);
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}
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/* Now there must be a hyphen */
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if(*guid_text != '-'){
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return FALSE; /* Nope */
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}
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guid_text++;
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/*
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* There must be 12 hex digits; if so,t hey go into the next 6 bytes
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* of guid->Data4.
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*/
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for(i = 0; i < 6; i++){
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digit1 = gethexdigit(guid_text);
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if(digit1 == -1){
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return FALSE; /* Not a hex digit */
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}
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guid_text++;
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digit2 = gethexdigit(guid_text);
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if(digit2 == -1){
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return FALSE; /* Not a hex digit */
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}
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guid_text++;
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guid->Data4[i+2] = (digit1 << 4)|(digit2);
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}
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/* Now there must be a closing } */
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if(*guid_text != '}'){
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return FALSE; /* Nope */
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}
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guid_text++;
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/* And that must be the end of the string */
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if(*guid_text != '\0'){
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return FALSE; /* Nope */
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}
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return TRUE;
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}
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/**********************************************************************************/
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/* Get the friendly name for the given GUID */
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char *
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get_interface_friendly_name_from_device_guid(__in GUID *guid)
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{
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HRESULT hr;
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/* Need to convert an Interface GUID to the interface friendly name (e.g. "Local Area Connection")
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* The functions required to do this all reside within iphlpapi.dll
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*/
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NET_LUID InterfaceLuid;
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hr = ConvertInterfaceGuidToLuid(guid, &InterfaceLuid);
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if(hr == NO_ERROR) {
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/* guid->luid success */
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WCHAR wName[NDIS_IF_MAX_STRING_SIZE + 1];
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hr = ConvertInterfaceLuidToAlias(&InterfaceLuid, wName, NDIS_IF_MAX_STRING_SIZE+1);
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if(hr == NO_ERROR) {
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/* luid->friendly name success */
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/* Get the required buffer size, and then convert the string
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* from UTF-16 to UTF-8. */
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int size;
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char *name;
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size = WideCharToMultiByte(CP_UTF8, 0, wName, -1, NULL, 0, NULL, NULL);
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if(size != 0) {
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name = (char *) g_malloc(size);
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if (name != NULL) {
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size = WideCharToMultiByte(CP_UTF8, 0, wName, -1, name, size, NULL, NULL);
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if(size != 0) {
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return name;
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}
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/* Failed, clean up the allocation */
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g_free(name);
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}
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}
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}
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}
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/* Failed to get a name */
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return NULL;
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}
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/*
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* Given an interface name, try to extract the GUID from it and parse it.
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* If that fails, return NULL; if that succeeds, attempt to get the
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* friendly name for the interface in question. If that fails, return
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* NULL, otherwise return the friendly name, allocated with g_malloc()
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* (so that it must be freed with g_free()).
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*/
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char *
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get_windows_interface_friendly_name(const char *interface_devicename)
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{
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const char* guid_text;
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GUID guid;
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/* Extract the guid text from the interface device name */
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if(strncmp("\\Device\\NPF_", interface_devicename, 12)==0){
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guid_text=interface_devicename+12; /* skip over the '\Device\NPF_' prefix, assume the rest is the guid text */
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}else{
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guid_text=interface_devicename;
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}
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if (!parse_as_guid(guid_text, &guid)){
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return NULL; /* not a GUID, so no friendly name */
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}
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/* guid okay, get the interface friendly name associated with the guid */
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return get_interface_friendly_name_from_device_guid(&guid);
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}
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/**************************************************************************************/
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#endif
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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