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)