< ARP: Add, Delete & Send | IP Helper Functions Main | IPv6 IPConfig Program Example >
IP Helper Functions 13 Part 5
What do we have in this chapter 13 part 5?
-
Changing IP Program Example
-
IPConfig Program Example
|
|
Changing IP Program Example
Create a new empty Win32 console mode application and add the project/solution name.
Add the following source code. |
/******************************************************************************\
* This is a part of the Microsoft Source Code Samples.
* Copyright 1996 - 1998 Microsoft Corporation.
* All rights reserved.
* This source code is only intended as a supplement to
* Microsoft Development Tools and/or WinHelp documentation.
* See these sources for detailed information regarding the
* Microsoft samples programs.
\******************************************************************************/
/*
Module Name: IPChangeExamplesrc.cpp
Abstract:
This module illustrates how to programmatically change an IP address for
a specific network adapter on your machine. This program also demonstrates how
to retrieve existing network adapter IP configuration information.
IP configurations can be changed for a specific network adapter by using the
AddIpAddress() and DeleteIpAddress() Ip Helper APIs. These APIs require you to
understand adapter index numbers and IP context numbers. In Windows, every network
adapter has a unique index ID and every IP address has a unique context ID.
Adapter index IDs and IP context numbers can be retrieved using the GetAdaptersInfo()
IP Helper API. This program features a list option that displays current network
adapter configuration information by showing all adapters index numbers and IP
address context numbers associated with their corresponding network adaptors.
IPChangeExample [ -l ] [ -a -n<index id> -i<ip address> -m<subnet mask> ]
[ -d -c<context id>]
-l List adapter index IDs and IP Address context ID information
-a Add IP Address option
-d Delete IP Address option
-i IP Address to specify with -a option
-m Subnet Mask to specify with -a option
-c IP context ID for an existing IP address
-n Index ID of an existing network adapter
Original author: Jim Ohlund 21-Apr-98
Revision History:
*/
// Link to ws2_32.lib
#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
// Link to Iphlpapi.lib
#include <iphlpapi.h>
void Usage(void)
{
printf("Usage: IPChangeExample [ -l ] [ -a -n<index id> -i<ip address> -m<subnet mask> ] "
"[ -d -c<context id>]\n\n"
"\t -l List adapter index IDs and IP Address context ID information\n"
"\t -a Add IP Address option\n"
"\t -d Delete IP Address option\n"
"\t -i IP Address to specify with -a option\n"
"\t -m Subnet Mask to specify with -a option\n"
"\t -c IP context ID for an existing IP address\n"
"\t -n Index ID of an existing network adapter\n");
}
void main(int argc, char *argv[])
{
WSADATA wsaData;
int i;
UINT j;
ULONG NTEContext = 0;
ULONG NTEInstance;
IPAddr NewIP;
IPAddr NewMask;
DWORD Index;
DWORD Context;
CHAR NewIPStr[64];
CHAR NewMaskStr[64];
PIP_ADAPTER_INFO pAdapterInfo, pAdapt;
PIP_ADDR_STRING pAddrStr;
DWORD AdapterInfoSize;
DWORD Err;
BOOL OptList = FALSE;
BOOL OptAdd = FALSE;
BOOL OptDel = FALSE;
NewIPStr[0] = '\0';
NewMaskStr[0] = '\0';
Context = Index = -1;
if(argc < 2)
{
Usage();
exit(1);
}
for (i = 1; i < argc; i++)
{
if ((argv[i][0] == '-') || (argv[i][0] == '/'))
{
switch(tolower(argv[i][1]))
{
case 'l':
OptList = TRUE;
break;
case 'a':
OptAdd = TRUE;
break;
case 'c':
if (strlen(argv[i]) > 2)
Context = atoi(&argv[i][2]);
break;
case 'd':
OptDel = TRUE;
break;
case 'i':
if (strlen(argv[i]) > 2)
strcpy_s(NewIPStr, sizeof(NewIPStr), &argv[i][2]);
break;
case 'm':
if (strlen(argv[i]) > 2)
strcpy_s(NewMaskStr, sizeof(NewMaskStr), &argv[i][2]);
break;
case 'n':
if (strlen(argv[i]) > 2)
Index = atoi(&argv[i][2]);
break;
default:
printf("default\n");
Usage();
return;
}
}
else
{
printf("else\n");
Usage();
return;
}
}
// Check options
if ((OptAdd && (Index == -1 || NewIPStr[0] == '\0' || NewMaskStr[0] == '\0')) || (OptDel && Context == -1))
{
Usage();
return;
}
if(WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
{
printf("WSAStartup() is OK!\n");
return;
}
else
printf("WSAStartup() is OK!\n");
// Get sizing information about all adapters
AdapterInfoSize = 0;
if ((Err = GetAdaptersInfo(NULL, &AdapterInfoSize)) != 0)
{
if (Err != ERROR_BUFFER_OVERFLOW)
{
printf("GetAdaptersInfo sizing failed with error %d\n", Err);
return;
}
}
// Allocate memory from sizing information
if ((pAdapterInfo = (PIP_ADAPTER_INFO) GlobalAlloc(GPTR, AdapterInfoSize)) == NULL)
{
printf("Memory allocation error\n");
return;
}
// Get actual adapter information
if ((Err = GetAdaptersInfo(pAdapterInfo, &AdapterInfoSize)) != 0)
{
printf("GetAdaptersInfo failed with error %d\n", Err);
return;
}
if (OptList)
{
printf("MAC Address - Adapter\n"
"Index Context Ip Address Subnet Mask\n"
"--------------------------------------------------------------\n");
pAdapt = pAdapterInfo;
while (pAdapt)
{
for (j=0; j<pAdapt->AddressLength; j++)
{
if (j == (pAdapt->AddressLength - 1))
printf("%.2X - ",(int)pAdapt->Address[j]);
else
printf("%.2X-",(int)pAdapt->Address[j]);
}
printf("%s\n", pAdapt->Description);
pAddrStr = &(pAdapt->IpAddressList);
while(pAddrStr)
{
printf("%-10.d%-10.d%-20.20s%s\n", pAdapt->Index, pAddrStr->Context, pAddrStr->IpAddress.String, pAddrStr->IpMask.String);
pAddrStr = pAddrStr->Next;
}
pAdapt = pAdapt->Next;
}
}
if (OptAdd)
{
NewIP = inet_addr(NewIPStr);
NewMask = inet_addr(NewMaskStr);
if ((Err = AddIPAddress(NewIP, NewMask, Index, &NTEContext, &NTEInstance)) != 0)
{
printf("AddIPAddress failed with error %d, %d\n", NTEContext, Err);
return;
}
}
if (OptDel)
{
if ((Err = DeleteIPAddress(Context)) != 0)
printf("DeleteIPAddress failed %d\n", Err);
}
if(WSACleanup() == 0)
printf("WSACleanup() is pretty fine!\n");
else
printf("WSACleanup() failed with error code %d\n", WSAGetLastError());
}
Build and run the project.
-------------------------------------------------------
IPConfig Program Example
Create a new empty Win32 console mode application and add the project/solution name.
Add the following source code.
/******************************************************************************\
* This is a part of the Microsoft Source Code Samples.
* Copyright 1996 - 1998 Microsoft Corporation.
* All rights reserved.
* This source code is only intended as a supplement to
* Microsoft Development Tools and/or WinHelp documentation.
* See these sources for detailed information regarding the
* Microsoft samples programs.
\******************************************************************************/
/*
Module Name: IpconfigExamplesrc.cpp
Abstract:
This module illustrates how to programmatically retrieve IP configuration
information similar to the IPCONFIG.EXE utility. It demonstrates how to use
the IP Helper APIs GetNetworkParams() and GetAdaptersInfo().
Original author: Jim Ohlund 21-Apr-98
Revision History:
*/
#include <windows.h>
// Link to Iphlpapi.lib
#include <iphlpapi.h>
#include <stdio.h>
#include <time.h>
void main(void)
{
DWORD Err;
PFIXED_INFO pFixedInfo;
DWORD FixedInfoSize = 0;
struct tm newtime, newtime1;
char buf[sizeof(newtime)];
errno_t Err1;
PIP_ADAPTER_INFO pAdapterInfo, pAdapt;
DWORD AdapterInfoSize;
PIP_ADDR_STRING pAddrStr;
// Get the main IP configuration information for this machine using a FIXED_INFO structure
if ((Err = GetNetworkParams(NULL, &FixedInfoSize)) != 0)
{
if (Err != ERROR_BUFFER_OVERFLOW)
{
printf("GetNetworkParams() sizing failed with error %d\n", Err);
return;
}
else
printf("GetNetworkParams() is OK!\n");
}
// Allocate memory from sizing information
if ((pFixedInfo = (PFIXED_INFO) GlobalAlloc(GPTR, FixedInfoSize)) == NULL)
{
printf("Memory allocation error!\n");
return;
}
else
printf("GlobalAlloc() is OK!\n");
if ((Err = GetNetworkParams(pFixedInfo, &FixedInfoSize)) == 0)
{
printf("GetNetworkParams() is OK!\n");
printf("\tHost Name . . . . . . . . . : %s\n", pFixedInfo->HostName);
printf("\tDNS Servers . . . . . . . . : %s\n", pFixedInfo->DnsServerList.IpAddress.String);
pAddrStr = pFixedInfo->DnsServerList.Next;
while(pAddrStr)
{
printf("%52s\n", pAddrStr->IpAddress.String);
pAddrStr = pAddrStr->Next;
}
printf("\tNode Type . . . . . . . . . : ");
switch (pFixedInfo->NodeType)
{
case 1:
printf("%s\n", "Broadcast");
break;
case 2:
printf("%s\n", "Peer-to-peer");
break;
case 4:
printf("%s\n", "Mixed");
break;
case 8:
printf("%s\n", "Hybrid");
break;
default:
printf("None!\n");
}
printf("\tNetBIOS Scope ID. . . . . . : %s\n", pFixedInfo->ScopeId);
printf("\tIP Routing Enabled. . . . . : %s\n", (pFixedInfo->EnableRouting ? "yes" : "no"));
printf("\tWINS Proxy Enabled. . . . . : %s\n", (pFixedInfo->EnableProxy ? "yes" : "no"));
printf("\tNetBIOS Resolution Uses DNS : %s\n", (pFixedInfo->EnableDns ? "yes" : "no"));
}
else
{
printf("GetNetworkParams() failed with error %d\n", Err);
return;
}
// Enumerate all of the adapter specific information using the IP_ADAPTER_INFO structure.
// Note: IP_ADAPTER_INFO contains a linked list of adapter entries.
AdapterInfoSize = 0;
if ((Err = GetAdaptersInfo(NULL, &AdapterInfoSize)) != 0)
{
if (Err != ERROR_BUFFER_OVERFLOW)
{
printf("GetAdaptersInfo() sizing failed with error %d\n", Err);
return;
}
else
printf("GetAdaptersInfo() should be fine!\n");
}
// Allocate memory from sizing information
if ((pAdapterInfo = (PIP_ADAPTER_INFO) GlobalAlloc(GPTR, AdapterInfoSize)) == NULL)
{
printf("Memory allocation error!\n");
return;
}
else
printf("GlobalAlloc() is OK!\n");
// Get actual adapter information
if ((Err = GetAdaptersInfo(pAdapterInfo, &AdapterInfoSize)) != 0)
{
printf("GetAdaptersInfo() failed with error %d\n", Err);
return;
}
else
printf("GetAdaptersInfo() is OK!\n");
pAdapt = pAdapterInfo;
while (pAdapt)
{
switch (pAdapt->Type)
{
case MIB_IF_TYPE_ETHERNET:
printf("\nEthernet adapter ");
break;
case MIB_IF_TYPE_TOKENRING:
printf("\nToken Ring adapter ");
break;
case MIB_IF_TYPE_FDDI:
printf("\nFDDI adapter ");
break;
case MIB_IF_TYPE_PPP:
printf("\nPPP adapter ");
break;
case MIB_IF_TYPE_LOOPBACK:
printf("\nLoopback adapter ");
break;
case MIB_IF_TYPE_SLIP:
printf("\nSlip adapter ");
break;
case MIB_IF_TYPE_OTHER:
default:
printf("\nOther adapter ");
}
printf("%s:\n\n", pAdapt->AdapterName);
printf("\tDescription . . . . . . . . : %s\n", pAdapt->Description);
printf("\tPhysical Address. . . . . . : ");
for (UINT i=0; i<pAdapt->AddressLength; i++)
{
if (i == (pAdapt->AddressLength - 1))
printf("%.2X\n",(int)pAdapt->Address[i]);
else
printf("%.2X-",(int)pAdapt->Address[i]);
}
printf("\tDHCP Enabled. . . . . . . . : %s\n", (pAdapt->DhcpEnabled ? "yes" : "no"));
pAddrStr = &(pAdapt->IpAddressList);
while(pAddrStr)
{
printf("\tIP Address. . . . . . . . . : %s\n", pAddrStr->IpAddress.String);
printf("\tSubnet Mask . . . . . . . . : %s\n", pAddrStr->IpMask.String);
pAddrStr = pAddrStr->Next;
}
printf("\tDefault Gateway . . . . . . : %s\n", pAdapt->GatewayList.IpAddress.String);
pAddrStr = pAdapt->GatewayList.Next;
while(pAddrStr)
{
printf("%52s\n", pAddrStr->IpAddress.String);
pAddrStr = pAddrStr->Next;
}
printf("\tDHCP Server . . . . . . . . : %s\n", pAdapt->DhcpServer.IpAddress.String);
printf("\tPrimary WINS Server . . . . : %s\n", pAdapt->PrimaryWinsServer.IpAddress.String);
printf("\tSecondary WINS Server . . . : %s\n", pAdapt->SecondaryWinsServer.IpAddress.String);
// Display coordinated universal time - GMT
// LeaseObtained member is only valid when the DhcpEnabled member is non-zero
if(pAdapt->DhcpEnabled != 0)
{
gmtime_s(&newtime, &pAdapt->LeaseObtained);
Err1 = asctime_s(buf, sizeof(newtime), &newtime );
if(Err1 == 0)
{
printf("err = %d\n", Err1);
printf( "\tLease Obtained. . . . . . . : %s", buf );
}
// LeaseExpires member is only valid when the DhcpEnabled member is non-zero.
gmtime_s(&newtime, &pAdapt->LeaseExpires);
Err1 = asctime_s(buf, sizeof(newtime1), &newtime );
if(Err1 == 0)
{
printf("err = %d\n", Err1);
printf( "\tLease Expires . . . . . . . : %s", buf );
}
}
else
{
printf("\tDHCP not enabled! pAdapt->DhcpEnabled = %d\n", pAdapt->DhcpEnabled);
printf("\t Then, no info for lease obtained & expires!\n");
}
pAdapt = pAdapt->Next;
}
}
Build and run the project.
< ARP: Add, Delete & Send | IP Helper Functions Main | IPv6 IPConfig Program Example >