HP-UX IPv6 Porting Guide (February 2007)

Function Calls Converting IP addresses to Names

getipnodebyaddr(3N)

Chapter 738

How getipnodebyaddr() processes IPv4-compatible IPv6 addresses

is AF_INET6,

len

equals 16, and the IPv6 address is an IPv4-mapped or an

IPv4-compatible IPv6 address, then:

1. skip the first 12 bytes of the IPv6 address.

2. set

to AF_INET.

3. set

len

to 4.

is AF_INET, lookup the name for the given IPv4 address; that is, query for a PTR record

in the in-addr.arpa domain.

is AF_INET6, lookup the name for the given IPv6 address; that is, query for a PTR

record in the ip6.int domain.

A successful function call copies

*src

and

into the returned hostent

name_ptr

structure.

An unsuccessful function returns a nonzero

error_num