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/*
* os_win32/hostname_win32.cpp
*
* Home page of code is: http://smartmontools.sourceforge.net
*
* Copyright (C) 2004-8 Christian Franke <smartmontools-support@lists.sourceforge.net>
*
* 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, or (at your option)
* any later version.
*
* You should have received a copy of the GNU General Public License
* (for example COPYING); if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "hostname_win32.h"
const char * hostname_win32_c_cvsid = "$Id: hostname_win32.cpp,v 1.6 2008/03/04 22:09:48 ballen4705 Exp $" HOSTNAME_WIN32_H_CVSID;
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <string.h>
#ifndef MAX_HOSTNAME_LEN
// From IPHlpApi.dll:
#define MAX_HOSTNAME_LEN 132
#define MAX_DOMAIN_NAME_LEN 132
#define MAX_SCOPE_ID_LEN 260
typedef struct {
char String[4 * 4];
} IP_ADDRESS_STRING,
*PIP_ADDRESS_STRING, IP_MASK_STRING, *PIP_MASK_STRING;
typedef struct _IP_ADDR_STRING {
struct _IP_ADDR_STRING* Next;
IP_ADDRESS_STRING IpAddress;
IP_MASK_STRING IpMask;
DWORD Context;
} IP_ADDR_STRING,
*PIP_ADDR_STRING;
typedef struct {
char HostName[MAX_HOSTNAME_LEN];
char DomainName[MAX_DOMAIN_NAME_LEN];
PIP_ADDR_STRING CurrentDnsServer;
IP_ADDR_STRING DnsServerList;
UINT NodeType;
char ScopeId[MAX_SCOPE_ID_LEN];
UINT EnableRouting;
UINT EnableProxy;
UINT EnableDns;
} FIXED_INFO,
*PFIXED_INFO;
DWORD WINAPI GetNetworkParams(PFIXED_INFO info, PULONG size);
#endif // MAX_HOSTNAME_LEN
// Call GetComputerNameEx() if available (Win2000/XP)
static BOOL CallGetComputerNameExA(int type, LPSTR name, LPDWORD size)
{
HINSTANCE hdll;
BOOL (WINAPI * GetComputerNameExA_p)(int/*enum COMPUTER_NAME_FORMAT*/, LPSTR, LPDWORD);
BOOL ret;
if (!(hdll = LoadLibraryA("KERNEL32.DLL")))
return FALSE;
if (!(GetComputerNameExA_p = (BOOL (WINAPI *)(int, LPSTR, LPDWORD))GetProcAddress(hdll, "GetComputerNameExA")))
ret = FALSE;
else
ret = GetComputerNameExA_p(type, name, size);
FreeLibrary(hdll);
return ret;
}
// Call GetNetworkParams() if available (Win98/ME/2000/XP)
static DWORD CallGetNetworkParams(PFIXED_INFO info, PULONG size)
{
HINSTANCE hdll;
DWORD (WINAPI * GetNetworkParams_p)(PFIXED_INFO, PULONG);
DWORD ret;
if (!(hdll = LoadLibraryA("IPHlpApi.dll")))
return ERROR_NOT_SUPPORTED;
if (!(GetNetworkParams_p = (DWORD (WINAPI *)(PFIXED_INFO, PULONG))GetProcAddress(hdll, "GetNetworkParams")))
ret = ERROR_NOT_SUPPORTED;
else
ret = GetNetworkParams_p(info, size);
FreeLibrary(hdll);
return ret;
}
// Get host/domainname from registry (Win98/ME/NT4/2000/XP)
static DWORD GetNamesFromRegistry(BOOL domain, char * name, int len)
{
HKEY hk; DWORD size, type;
if (RegOpenKeyExA(HKEY_LOCAL_MACHINE,
(GetVersion() & 0x80000000
? "System\\CurrentControlSet\\Services\\VxD\\MSTCP" //Win9x/ME
: "System\\CurrentControlSet\\Services\\Tcpip\\Parameters"),
0, KEY_READ, &hk) != ERROR_SUCCESS)
return 0;
size = len-1;
if (!(RegQueryValueExA(hk, (!domain?"HostName":"Domain"), 0, &type, (unsigned char *)name, &size) == ERROR_SUCCESS && type == REG_SZ))
size = 0;
if (size == 0 && domain) {
size = len-1;
if (!(RegQueryValueExA(hk, "DhcpDomain", 0, &type, (unsigned char *)name, &size) == ERROR_SUCCESS && type == REG_SZ))
size = 0;
}
RegCloseKey(hk);
return size;
}
static int gethostdomname(int domain, char * name, int len)
{
DWORD size; FIXED_INFO info;
// try KERNEL32.dll::GetComputerNameEx()
size = len - 1;
if (CallGetComputerNameExA((!domain ? 1:2/*ComputerNameDnsHost:Domain*/), name, &size))
return 0;
// try IPHlpApi.dll::GetNetworkParams()
size = sizeof(info);
if (CallGetNetworkParams(&info, &size) == ERROR_SUCCESS) {
strncpy(name, (!domain?info.HostName:info.DomainName), len-1); name[len-1] = 0;
return 0;
}
// try registry
if (GetNamesFromRegistry(domain, name, len))
return 0;
if (domain)
return -1;
// last resort: get NETBIOS name
size = len - 1;
if (GetComputerNameA(name, &size))
return 0;
return -1;
}
int gethostname(char * name, int len)
{
return gethostdomname(0, name, len);
}
int getdomainname(char * name, int len)
{
return gethostdomname(1, name, len);
}
#ifdef TEST
#include <stdio.h>
main()
{
char name[256];
if (gethostname(name, sizeof(name)))
strcpy(name, "Error");
printf("hostname=\"%s\"\n", name);
if (getdomainname(name, sizeof(name)))
strcpy(name, "Error");
printf("domainname=\"%s\"\n", name);
return 0;
}
#endif
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