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

       This function is deprecated as of c-ares 1.10, please use ares_dns_record_create(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)

                                                   20 Nov 2009                                   ARES_MKQUERY(3)