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.\"
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.\" Copyright 1998 by the Massachusetts Institute of Technology.
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.\"
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.\" Permission to use, copy, modify, and distribute this
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.\" software and its documentation for any purpose and without
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.\" fee is hereby granted, provided that the above copyright
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.\" notice appear in all copies and that both that copyright
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.\" notice and this permission notice appear in supporting
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.\" documentation, and that the name of M.I.T. not be used in
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.\" advertising or publicity pertaining to distribution of the
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.\" software without specific, written prior permission.
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.\" M.I.T. makes no representations about the suitability of
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.\" this software for any purpose. It is provided "as is"
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.\" without express or implied warranty.
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.\"
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.TH ARES_PARSE_PTR_REPLY 3 "25 July 1998"
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.SH NAME
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ares_parse_ptr_reply \- Parse a reply to a DNS query of type PTR into a hostent
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.SH SYNOPSIS
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.nf
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#include <ares.h>
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int ares_parse_ptr_reply(const unsigned char *\fIabuf\fP, int \fIalen\fP,
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const void *\fIaddr\fP, int \fIaddrlen\fP,
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int \fIfamily\fP, struct hostent **\fIhost\fP);
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.fi
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.SH DESCRIPTION
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The
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.B ares_parse_ptr_reply
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function parses the response to a query of type PTR into a
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.BR "struct hostent" .
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The parameters
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.I abuf
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and
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.I alen
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give the contents of the response. The parameters
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.IR addr ,
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.IR addrlen ,
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and
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.I family
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specify which address was queried for; they are not used to verify the
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response, merely used to fill in the address of the
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.BR "struct hostent" .
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The resulting
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.B struct hostent
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is stored in allocated memory and a pointer to it stored into the
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variable pointed to by
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.IR host .
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It is the caller's responsibility to free the resulting host structure
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using
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.BR ares_free_hostent (3)
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when it is no longer needed.
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.SH RETURN VALUES
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.B ares_parse_ptr_reply
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can return any of the following values:
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.TP 15
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.B ARES_SUCCESS
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The response was successfully parsed.
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.TP 15
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.B ARES_EBADRESP
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The response was malformatted.
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.TP 15
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.B ARES_ENODATA
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The response did not contain an answer to the query.
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.TP 15
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.B ARES_ENOMEM
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Memory was exhausted.
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.SH SEE ALSO
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.BR ares_gethostbyaddr (3),
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.BR ares_free_hostent (3)
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.SH AUTHOR
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Greg Hudson, MIT Information Systems
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.br
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Copyright 1998 by the Massachusetts Institute of Technology.
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