FIXED_INFO_W2KSP1 structure (iptypes.h)
The FIXED_INFO structure contains information that is the same across all the interfaces on a computer.
Syntax
typedef struct {
char HostName[MAX_HOSTNAME_LEN + 4];
char DomainName[MAX_DOMAIN_NAME_LEN + 4];
PIP_ADDR_STRING CurrentDnsServer;
IP_ADDR_STRING DnsServerList;
UINT NodeType;
char ScopeId[MAX_SCOPE_ID_LEN + 4];
UINT EnableRouting;
UINT EnableProxy;
UINT EnableDns;
} FIXED_INFO_W2KSP1, *PFIXED_INFO_W2KSP1;
Members
HostName[MAX_HOSTNAME_LEN + 4]
Type: char[MAX_HOSTNAME_LEN + 4]
The hostname for the local computer. This may be the fully qualified hostname (including the domain) for a computer that is joined to a domain.
DomainName[MAX_DOMAIN_NAME_LEN + 4]
Type: char[MAX_DOMAIN_NAME_LEN + 4]
The domain in which the local computer is registered.
CurrentDnsServer
Type: PIP_ADDR_STRING
Reserved. Use the DnsServerList member to obtain the DNS servers for the local computer.
DnsServerList
Type: IP_ADDR_STRING
A linked list of IP_ADDR_STRING structures that specify the set of DNS servers used by the local computer.
NodeType
Type: UINT
The node type of the local computer. These values are defined in the Iptypes.h header file.
ScopeId[MAX_SCOPE_ID_LEN + 4]
Type: char[MAX_SCOPE_ID_LEN + 4]
The DHCP scope name.
EnableRouting
Type: UINT
A Boolean value that specifies whether routing is enabled on the local computer.
EnableProxy
Type: UINT
A Boolean value that specifies whether the local computer is acting as an ARP proxy.
EnableDns
Type: UINT
A Boolean value that specifies whether DNS is enabled on the local computer.
Remarks
The FIXED_INFO structure is retrieved by the GetNetworkParams function.
In the Microsoft Windows Software Development Kit (SDK), the FIXED_INFO_WIN2KSP1 structure is defined. When compiling an
application if the target platform is Windows 2000 with Service Pack 1 (SP1) and later (NTDDI_VERSION >= NTDDI_WIN2KSP1,
_WIN32_WINNT >= 0x0501, or
WINVER >= 0x0501), the FIXED_INFO_WIN2KSP1 struct is typedefed to the FIXED_INFO structure. When compiling an application if the target
platform is not Windows 2000 with SP1 and later, the
FIXED_INFO structure is undefined.
The GetNetworkParams function and the FIXED_INFO structure are supported on Windows 98and later. But to build an application for a target platform earlier than Windows 2000 with Service Pack 1 (SP1), an earlier version of the Platform Software Development Kit (SDK) must be used.
Examples
The following code retrieves a FIXED_INFO structure that contains network configuration information for the local computer. The code prints selected members from the structure.
//
// Link with IPHlpAPI.lib
//
#include <winsock2.h>
#include <iphlpapi.h>
#include <stdio.h>
#include <windows.h>
#pragma comment(lib, "IPHLPAPI.lib")
#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
/* Note: could also use malloc() and free() */
int __cdecl main()
{
FIXED_INFO *pFixedInfo;
ULONG ulOutBufLen;
DWORD dwRetVal;
IP_ADDR_STRING *pIPAddr;
pFixedInfo = (FIXED_INFO *) MALLOC(sizeof (FIXED_INFO));
if (pFixedInfo == NULL) {
printf("Error allocating memory needed to call GetNetworkParams\n");
return 1;
}
ulOutBufLen = sizeof (FIXED_INFO);
// Make an initial call to GetAdaptersInfo to get
// the necessary size into the ulOutBufLen variable
if (GetNetworkParams(pFixedInfo, &ulOutBufLen) == ERROR_BUFFER_OVERFLOW) {
FREE(pFixedInfo);
pFixedInfo = (FIXED_INFO *) MALLOC(ulOutBufLen);
if (pFixedInfo == NULL) {
printf("Error allocating memory needed to call GetNetworkParams\n");
return 1;
}
}
if (dwRetVal = GetNetworkParams(pFixedInfo, &ulOutBufLen) == NO_ERROR) {
printf("Host Name: %s\n", pFixedInfo->HostName);
printf("Domain Name: %s\n", pFixedInfo->DomainName);
printf("DNS Servers:\n");
printf("\t%s\n", pFixedInfo->DnsServerList.IpAddress.String);
pIPAddr = pFixedInfo->DnsServerList.Next;
while (pIPAddr) {
printf("\t%s\n", pIPAddr->IpAddress.String);
pIPAddr = pIPAddr->Next;
}
printf("Node Type: ");
switch (pFixedInfo->NodeType) {
case BROADCAST_NODETYPE:
printf("Broadcast node\n");
break;
case PEER_TO_PEER_NODETYPE:
printf("Peer to Peer node\n");
break;
case MIXED_NODETYPE:
printf("Mixed node\n");
break;
case HYBRID_NODETYPE:
printf("Hybrid node\n");
break;
default:
printf("Unknown node type %0lx\n", pFixedInfo->NodeType);
break;
}
printf("DHCP scope name: %s\n", pFixedInfo->ScopeId);
if (pFixedInfo->EnableRouting)
printf("Routing: enabled\n");
else
printf("Routing: disabled\n");
if (pFixedInfo->EnableProxy)
printf("ARP proxy: enabled\n");
else
printf("ARP Proxy: disabled\n");
if (pFixedInfo->EnableDns)
printf("DNS: enabled\n");
else
printf("DNS: disabled\n");
} else {
printf("GetNetworkParams failed with error: %d\n", dwRetVal);
return 1;
}
if (pFixedInfo)
FREE(pFixedInfo);
return 0;
}
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Header | iptypes.h (include Iphlpapi.h) |