Chapter 13:

The IP Helper Functions

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What do we have in this chapter?

1. Ipconfig

Releasing and Renewing IPv4 Addresses

Changing IPv4 Addresses

2. Netstat

Retrieving the TCP Connection Table

Retrieving the UDP Listener Table

Retrieving IPv4 Protocol Statistics

3. Route

Getting the Routing Table

Adding a Route

Deleting a Route

4. ARP

Adding an ARP Entry

Deleting an ARP Entry

Sending an ARP Request

Program Examples

ARP Program Example

5. Changing IP Program Example

IPConfig Program Example

6. IPConfig for IPv6 Example

7. DHCP Renew and Release Program Example

Retrieving the IPv4 routing table with GetIpForwardTable() Example

8. Program Example Using GetIpAddrTable() Function

Program Example Using AddIPAddress() Function

9. Program Example Using GetAdaptersInfo() Function

Program Example Using GetAdaptersAddresses() Function

10. Program Example Using GetInterfaceInfo() Function

Program Example Using GetIfEntry() and GetIfTable() Functions

11. Getting an Interface Table Program Example

Program Example Using SetIpForwardEntry() Function

12. Program Example Using GetIpInterfaceTable() Function

Getting IP Statistics Program Example

13. Program Example Using GetTcpTable() Function

Summary

This chapter introduced the IP Helper APIs in terms of several well-known system utilities. This allows you to easily see how to programmatically obtain useful information from the IPv4 network stack. The IP Helper APIs currently enumerate only IPv4 information except for the new IP Helper API GetAdaptersAddresses(), which obtains IPv6 addressing information.

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