Index: dll/win32/iphlpapi/iphlpapi_main.c
===================================================================
--- dll/win32/iphlpapi/iphlpapi_main.c	(revision 72796)
+++ dll/win32/iphlpapi/iphlpapi_main.c	(working copy)
@@ -1404,7 +1404,7 @@
  */
 DWORD WINAPI GetNetworkParams(PFIXED_INFO pFixedInfo, PULONG pOutBufLen)
 {
-  DWORD ret, size;
+  DWORD ret, size, type;
   LONG regReturn;
   HKEY hKey;
   PIPHLP_RES_INFO resInfo;
@@ -1426,11 +1426,60 @@
   }
 
   memset(pFixedInfo, 0, size);
-  size = sizeof(pFixedInfo->HostName);
-  GetComputerNameExA(ComputerNameDnsHostname, pFixedInfo->HostName, &size);
-  size = sizeof(pFixedInfo->DomainName);
-  GetComputerNameExA(ComputerNameDnsDomain, pFixedInfo->DomainName, &size);
+  /* Check for DhcpHostname and DhcpDomain first */
+  regReturn = RegOpenKeyExA(HKEY_LOCAL_MACHINE,
+                            "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters",
+                            0,
+                            KEY_READ,
+                            &hKey);
+  if (regReturn == ERROR_SUCCESS) {
+      /* Windows doesn't honor DHCP option 12 even if RFC requires it if it is returned by DHCP server! */
+#if 0
+      type = REG_SZ;
+      size = sizeof(pFixedInfo->HostName);
+      regReturn = RegQueryValueExA(hKey,
+                                      "DhcpHostname",
+                                      NULL,
+                                      &type,
+                                      (LPBYTE)pFixedInfo->HostName,
+                                      &size);
+      if (regReturn == ERROR_FILE_NOT_FOUND || (regReturn == ERROR_SUCCESS && size < 1))
+      {
+#endif
+          type = REG_SZ;
+          size = sizeof(pFixedInfo->HostName);
+          regReturn = RegQueryValueExA(hKey,
+                                          "Hostname",
+                                          NULL,
+                                          &type,
+                                          (LPBYTE)pFixedInfo->HostName,
+                                          &size);
+#if 0
+      }
+#endif
 
+      type = REG_SZ;
+      size = sizeof(pFixedInfo->DomainName);
+      regReturn = RegQueryValueExA(hKey,
+                                      "DhcpDomain",
+                                      NULL,
+                                      &type,
+                                      (LPBYTE)pFixedInfo->DomainName,
+                                      &size);
+      if (regReturn == ERROR_FILE_NOT_FOUND || (regReturn == ERROR_SUCCESS && size < 1))
+      {
+          type = REG_SZ;
+          size = sizeof(pFixedInfo->DomainName);
+          regReturn = RegQueryValueExA(hKey,
+                                          "Domain",
+                                          NULL,
+                                          &type,
+                                          (LPBYTE)pFixedInfo->DomainName,
+                                          &size);
+      }
+      RegCloseKey(hKey);
+  }
+
   TRACE("GetComputerNameExA: %s\n", pFixedInfo->DomainName);
 
   if (resInfo->riCount > 0)