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
Data Structure Changes
Generic Socket Address Structure
Chapter 318
Generic Socket Address Structure
Header file
<netinet/in.h>
struct sockaddr_storage
The sockaddr_storage data structure simplifies writing portable code across multiple
address families and platforms. This data structure provides the following flexibility and
consistency.
• One simple addition to the sockets API that can help application writers is the struct
sockaddr_storage structure. The structure is large enough to accommodate all
supported protocol-specific address structures.
• sockaddr_storage aligns at an appropriate boundary so that pointers to it - can be cast
as pointers to protocol specific address structures and used to access the fields of those
structures without alignment problems.