ares_expand_name(3) [debian man page]

ARES_EXPAND_NAME(3)					     Library Functions Manual					       ARES_EXPAND_NAME(3)

NAME

       ares_expand_name - Expand a DNS-encoded domain name

SYNOPSIS

       #include <ares.h>

       int ares_expand_name(const unsigned char *encoded,
       const unsigned char *abuf, int alen, char **s,
	    long *enclen)

DESCRIPTION

       The  ares_expand_name function converts a DNS-encoded domain name to a dot-separated C string.  The argument encoded gives the beginning of
       the encoded domain name, and the arguments abuf and alen give the containing message buffer (necessary for the  processing  of  indirection
       pointers  within  the encoded domain name).  The result is placed in a NUL-terminated allocated buffer, a pointer to which is stored in the
       variable pointed to by s.  The length of the encoded name is stored in the variable pointed to by enclen so that  the  caller  can  advance
       past the encoded domain name to read further data in the message.

RETURN VALUES

       ares_expand_name can return any of the following values:

       ARES_SUCCESS   Expansion of the encoded name succeeded.

       ARES_EBADNAME  The encoded domain name was malformed and could not be expanded.

       ARES_ENOMEM    Memory was exhausted.

SEE ALSO

       ares_mkquery(3)

AUTHOR

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

								    20 Nov 2009 					       ARES_EXPAND_NAME(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 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_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)