dns_name4_domain(3) Library Functions Manual dns_name4_domain(3)NAME
dns_name4_domain - construct host name for reverse lookup
SYNTAX
#include <dns.h>
void dns_name4_domain(char q[DNS_NAME4_DOMAIN],
const char* ip[4]);
DESCRIPTION
dns_name4_domain is a low-level component of dns_name4. It converts an IP address such as 1.2.3.4 into a domain name such as 4.3.2.1.in-
addr.arpa and places the packet-encoded domain name into q.
q is zero terminated.
q must have space for DNS_NAME4_DOMAIN bytes.
SEE ALSO dns_name4(3), dns_name6_domain(3)dns_name4_domain(3)
Check Out this Related Man Page
ARES_EXPAND_NAME(3) Library Functions Manual ARES_EXPAND_NAME(3)NAME
ares_expand_name - Expand a DNS-encoded domain name
SYNOPSIS
#include <ares.h>
int ares_expand_name(const unsigned char *encoded,
const unsigned char *abuf, int alen, char **s,
long *enclen)
DESCRIPTION
The ares_expand_name function converts a DNS-encoded domain name to a dot-separated C string. The argument encoded gives the beginning of
the encoded domain name, and the arguments abuf and alen give the containing message buffer (necessary for the processing of indirection
pointers within the encoded domain name). The result is placed in a NUL-terminated allocated buffer, a pointer to which is stored in the
variable pointed to by s. The length of the encoded name is stored in the variable pointed to by enclen so that the caller can advance
past the encoded domain name to read further data in the message.
Use ares_free_string(3) to free the allocated hostname.
RETURN VALUES
ares_expand_name can return any of the following values:
ARES_SUCCESS Expansion of the encoded name succeeded.
ARES_EBADNAME The encoded domain name was malformed and could not be expanded.
ARES_ENOMEM Memory was exhausted.
SEE ALSO ares_mkquery(3),ares_free_string(3)AUTHOR
Greg Hudson, MIT Information Systems
Copyright 1998 by the Massachusetts Institute of Technology.
20 Nov 2009 ARES_EXPAND_NAME(3)