ARES_MKQUERY(3)        FreeBSD 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 _create_query&section=3">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 _free_string&section=3">ares_free_string(3) when it is no longer needed.

       Usage of _mkquery&section=3">ares_mkquery(3) is deprecated, whereas the function is
       equivalent to _create_query&section=3">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_free_string(3)

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

                                  20 Nov 2009                  ARES_MKQUERY(3)