HP-UX IPv6 Porting Guide (September 2004)
Table Of Contents
- About This Document
- 1 Introduction
- 2 IPv6 Addressing
- 3 Data Structure Changes
- 4 Migrating Applications from IPv4 to IPv6
- 5 Overview of IPv4 and IPv6 Call Set-up
- 6 Function Calls Converting Names to Addresses
- 7 Function Calls Converting IP addresses to Names
- 8 Reading Error Messages
- 9 Freeing Memory
- 10 Converting Binary and Text Addresses
- 11 Testing for Scope and Type of IPv6 addresses using Macros
- 12 Identifying Local Interface Names and Indexes
- 13 Configuring or Querying an Interface using IPv6 ioctl() Function Calls
- 14 Verifying IPv6 Installation
- 15 Sample Client/Server Programs
- A IPv4 to IPv6 Quick Reference Guide
Migrating Applications from IPv4 to IPv6
IPv4/IPv6 Dual Stack
Chapter 4 21
IPv4/IPv6 Dual Stack
HP-UX IPv6 supports a dual IPv4/IPv6 protocol stack. The Dual-Stack does not affect existing
IPv4 source or binary files. Legacy IPv4-to-IPv4 applications follow existing code paths
through the IPv4 module.
Figure 4-1 Dual IPv4 and IPv6 Stack
TCP
IPv6 IPv4
UDP
Ethernet FDDI
ApplicationApplication
Layer
Transport
Layer
Network
Layer
Physical
Layer