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  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_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_ENOTFOUND The query name name refers to a .onion domain name. See RFC 7686.

       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_dns_record(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)