CentOS 7.0 - man page for ares_mkquery (centos section 3)

ARES_MKQUERY(3) 			       Library Functions Manual 			      ARES_MKQUERY(3)

NAME
       ares_mkquery - Compose a single-question DNS query buffer

SYNOPSIS
       #include <ares.h>

       int ares_mkquery(const char *name, int dnsclass, int type,
       unsigned short id, int rd, unsigned char **buf,
       int *buflen)

DESCRIPTION
       Deprecated function. See ares_create_query(3) instead!

       The  ares_mkquery  function  composes  a DNS query with a single question.  The parameter name gives the query
       name as a NUL-terminated C string of period-separated labels optionally ending  with  a	period;  periods  and
       backslashes  within  a label must be escaped with a backlash.  The parameters dnsclass and type give the class
       and type of the query using the values defined in <arpa/nameser.h>.  The parameter id gives a  16-bit  identi-
       fier  for the query.  The parameter rd should be nonzero if recursion is desired, zero if not.  The query will
       be placed in an allocated buffer, a pointer to which will be stored in the variable pointed to by buf, and the
       length  of  which  will	be stored in the variable pointed to by buflen.  It is the caller's responsibility to
       free this buffer using ares_free_string(3) when it is no longer needed.

       Usage of ares_mkquery(3) is deprecated, whereas	the  function  is  equivalent  to  ares_create_query(3)  with
       max_udp_size set to 0.

RETURN VALUES
       ares_mkquery can return any of the following values:

       ARES_SUCCESS   Construction of the DNS query succeeded.

       ARES_EBADNAME  The  query name name could not be encoded as a domain name, either because it contained a zero-
		      length label or because it contained a label of more than 63 characters.

       ARES_ENOMEM    Memory was exhausted.

SEE ALSO
       ares_expand_name(3), ares_free_string(3)

AUTHOR
       Greg Hudson, MIT Information Systems
       Copyright 1998, 2000 by the Massachusetts Institute of Technology.

						     20 Nov 2009				      ARES_MKQUERY(3)