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

ARES_MKQUERY(3) 								  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 back-
       lash.  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 identifier 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_cre-
       ate_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)