1ARES_EXPAND_NAME(3)        Library Functions Manual        ARES_EXPAND_NAME(3)
2
3
4

NAME

6       ares_expand_name - Expand a DNS-encoded domain name
7

SYNOPSIS

9       #include <ares.h>
10
11       int ares_expand_name(const unsigned char *encoded,
12       const unsigned char *abuf, int alen, char **s,
13            long *enclen)
14

DESCRIPTION

16       The  ares_expand_name  function converts a DNS-encoded domain name to a
17       dot-separated C string.  The argument encoded gives  the  beginning  of
18       the  encoded domain name, and the arguments abuf and alen give the con‐
19       taining message buffer (necessary for  the  processing  of  indirection
20       pointers  within  the  encoded domain name).  The result is placed in a
21       NUL-terminated allocated buffer, a pointer to which is  stored  in  the
22       variable  pointed to by s.  The length of the encoded name is stored in
23       the variable pointed to by enclen so that the caller can  advance  past
24       the encoded domain name to read further data in the message.
25
26       Use ares_free_string(3) to free the allocated hostname.
27

RETURN VALUES

29       ares_expand_name can return any of the following values:
30
31       ARES_SUCCESS   Expansion of the encoded name succeeded.
32
33       ARES_EBADNAME  The  encoded  domain name was malformed and could not be
34                      expanded.
35
36       ARES_ENOMEM    Memory was exhausted.
37

SEE ALSO

39       ares_mkquery(3),ares_free_string(3)
40

AUTHOR

42       Greg Hudson, MIT Information Systems
43       Copyright 1998 by the Massachusetts Institute of Technology.
44
45
46
47                                  20 Nov 2009              ARES_EXPAND_NAME(3)