RE: [WinPcap-users] retreiving adapter info

[David Barnish]

I just knew you were going to ask that question. ;>) I omitted that part of the code so it wouldn't be confusing and most people don't care about Windows 95/98. Since you do, here is the version that will work on any version of windows supported by WinPCap.   int main(int argc, char* argv[]) {    DWORD dwVersion;  DWORD dwWindowsMajorVersion;  unsigned int i;  long lRC; // Long return code.  WCHAR AdapterName[8192]; // string that contains a list of the network adapters  WCHAR *temp, *temp1;  char AdapterList[MAX_NUM_ADAPTERS][1024];    char TempAsciiString[8192];  //ascii strings (win95)  char AdapterNamea[8192]; // string that contains a list of the network adapters  char *tempa,*temp1a;  unsigned int   AdapterNum = 0;  ULONG AdapterLength;    memset(AdapterList, 0, (MAX_NUM_ADAPTERS * 1024) );  memset(AdapterName, 0, sizeof(AdapterName) );  memset(AdapterNamea, 0, sizeof(AdapterNamea) );  memset(TempAsciiString, 0, sizeof(TempAsciiString) );    // obtain the name of the adapters installed on this machine  AdapterLength=4096;    printf("\n===============================================\n");  printf("Valid Packet Sniffing Adapters:\n");    i=0;  // the data returned by PacketGetAdapterNames is different in Win95/98  // and WinNT/2000/XP.  // We have to check the OS on which we are running  dwVersion=GetVersion();  dwWindowsMajorVersion =  (DWORD)(LOBYTE(LOWORD(dwVersion)));  if (!(dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4))  {  // Windows NT/2000/XP   if(PacketGetAdapterNames((char *)AdapterName, &AdapterLength) == FALSE)   {    printf("Error: Unable to retrieve the list of the adapters!\n");    exit(-1);   }   // The string returned is a multi-byte string.   temp = AdapterName;   temp1 = AdapterName;   while (true)   {    if( (*temp1 == '\0') && (*(temp1+1) == '\0') )    {     // We're at the end of the string.     break;    }    if (*(temp1+1) == '\0')    {     // Temp1 points to the end of the string.     nRC = WideCharToMultiByte(CP_ACP, 0, temp, -1, TempAsciiString,      sizeof(TempAsciiString), 0, 0);     if (nRC > 0)     {      memcpy(AdapterList[i], TempAsciiString, (temp1 - temp)+1);     }     temp = temp1+2;     i++;    }    temp1++;   }      AdapterNum=i;   for (i = 0; i < AdapterNum; i++)   {    printf("%d- %s\n", i+1, AdapterList[i]);   }   printf("\n");     } else {   //windows 95/98   if(PacketGetAdapterNames(AdapterNamea,&AdapterLength)==FALSE)   {    printf("Error: Unable to retrieve the list of the adapters!\n");    exit(-1);   }   tempa = AdapterNamea;   temp1a = AdapterNamea;   while (true)   {    if( (*temp1a == '\0') && (*(temp1a+1) == '\0') )    {     // We're at the end of the string.     break;    }    if (*(temp1a+1) == '\0')    {     // Temp1 points to the end of the string.     memcpy(AdapterList[i], tempa, (temp1a - tempa)+1);     tempa = temp1a+2;     i++;    }    temp1a++;   }      AdapterNum=i;   for (i = 0; i < AdapterNum; i++)   {    printf("%d- %s\n", i+1, AdapterList[i]);   }   printf("\n");  } }   Thank you, David Barnish Senior Software Engineer Research And Development [EMAIL PROTECTED] Spanlink Communications 7125 Northland Terrace, Suite 100 Brooklyn Park, Minnesota 55428 (763) 971-2000   -----Original Message----- From: Annie Deroo [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 01, 2003 8:43 AM To: [EMAIL PROTECTED] Subject: Re: [WinPcap-users] retreiving adapter info It works, but I have a question: can this code also be used under Win95 or 98? I know there is a difference between them and NT or XP. And what do I have to change to make it work under both systems?   Thank U ----- Original Message ----- From: David Barnish To: [EMAIL PROTECTED] Sent: Monday, June 30, 2003 4:03 PM Subject: RE: [WinPcap-users] retreiving adapter info Try this...    unsigned int i;  int nRC;  WCHAR AdapterName[8192]; // string that contains a list of the network adapters  WCHAR *temp, *temp1;  char  AdapterList[MAX_NUM_ADAPTERS][1024];  char  TempAsciiString[8192];  unsigned int AdapterNum = 0;  ULONG  AdapterLength;    memset(AdapterList, 0, (MAX_NUM_ADAPTERS * 1024) );  memset(AdapterName, 0, sizeof(AdapterName) );  memset(TempAsciiString, 0, sizeof(TempAsciiString) );    // obtain the name of the adapters installed on this machine  AdapterLength=4096;    i=0;  if(PacketGetAdapterNames((char *)AdapterName, &AdapterLength) == FALSE)  {   printf("Error: Unable to retrieve the list of the adapters!\n");   exit(-1);  }    // The string returned is a multi-byte string on WinNT or later versions of Windows.  temp = AdapterName;  temp1 = AdapterName;  while (true)  {   if( (*temp1 == '\0') && (*(temp1+1) == '\0') )   {    // We're at the end of the string.    break;   }   if (*(temp1+1) == '\0')   {    // Temp1 points to the end of the string.    nRC = WideCharToMultiByte(CP_ACP, 0, temp, -1, TempAsciiString,     sizeof(TempAsciiString), 0, 0);    if (nRC > 0)    {     memcpy(AdapterList[i], TempAsciiString, (temp1 - temp)+1);    }    temp = temp1+2;    i++;   }   temp1++;  }     AdapterNum=i;  for (i = 0; i < AdapterNum; i++)  {   printf("%d- %s\n", i+1, AdapterList[i]);  }  printf("\n"); David Barnish     -----Original Message----- From: Annie Deroo [mailto:[EMAIL PROTECTED] Sent: Sunday, June 29, 2003 8:21 AM To: [EMAIL PROTECTED] Subject: [WinPcap-users] retreiving adapter info How can I get a list of my adapters? I know the function PacketGetAdapterNames gives me all the adapters on my computers, but how do I show information about them in a Visual C++ program? Functions like wprintf(L"\n%d- %s\n",i+1,AdapterList[i]) (output = 7) and printf("\n%d- %s\n",i+1,AdapterList[i]) (error when running) can't be used to put a CString in a list or in a messagebox! The compiler says: left of '.SymbolicLink' must have class/struct/union type, when I use the SymbolicLink part of the adapters. In my program I want to show info about the available adapters in a list and let the user select one. I'm sure this is done before in Visual C++, so if somebody knows how I could do that or knows where I can find code that does that, let me know. Thank U