mirror of
https://github.com/moparisthebest/curl
synced 2024-11-04 16:45:06 -05:00
77 lines
2.4 KiB
Groff
77 lines
2.4 KiB
Groff
.\" $Id$
|
|
.\"
|
|
.\" Copyright 1998, 2000 by the Massachusetts Institute of Technology.
|
|
.\"
|
|
.\" Permission to use, copy, modify, and distribute this
|
|
.\" software and its documentation for any purpose and without
|
|
.\" fee is hereby granted, provided that the above copyright
|
|
.\" notice appear in all copies and that both that copyright
|
|
.\" notice and this permission notice appear in supporting
|
|
.\" documentation, and that the name of M.I.T. not be used in
|
|
.\" advertising or publicity pertaining to distribution of the
|
|
.\" software without specific, written prior permission.
|
|
.\" M.I.T. makes no representations about the suitability of
|
|
.\" this software for any purpose. It is provided "as is"
|
|
.\" without express or implied warranty.
|
|
.\"
|
|
.TH ARES_MKQUERY 3 "4 January 2000"
|
|
.SH NAME
|
|
ares_mkquery \- Compose a single-question DNS query buffer
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.B #include <ares.h>
|
|
.PP
|
|
.B int ares_mkquery(const char *\fIname\fP, int \fIdnsclass\fP, int \fItype\fP,
|
|
.B unsigned short \fIid\fP, int \fIrd\fP, char **\fIbuf\fP,
|
|
.B int *\fIbuflen\fP)
|
|
.fi
|
|
.SH DESCRIPTION
|
|
The
|
|
.B ares_mkquery
|
|
function composes a DNS query with a single question.
|
|
The parameter
|
|
.I 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
|
|
.I dnsclass
|
|
and
|
|
.I type
|
|
give the class and type of the query using the values defined in
|
|
.BR <arpa/nameser.h> .
|
|
The parameter
|
|
.I id
|
|
gives a 16-bit identifier for the query. The parameter
|
|
.I 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
|
|
.IR buf ,
|
|
and the length of which will be stored in the variable pointed to by
|
|
.IR buflen .
|
|
It is the caller's responsibility to free this buffer using
|
|
\fIares_free_string(3)\fP when it is no longer needed.
|
|
.SH RETURN VALUES
|
|
.B ares_mkquery
|
|
can return any of the following values:
|
|
.TP 15
|
|
.B ARES_SUCCESS
|
|
Construction of the DNS query succeeded.
|
|
.TP 15
|
|
.B ARES_EBADNAME
|
|
The query name
|
|
.I 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.
|
|
.TP 15
|
|
.B ARES_ENOMEM
|
|
Memory was exhausted.
|
|
.SH SEE ALSO
|
|
.BR ares_expand_name (3),
|
|
.BR ares_free_string (3)
|
|
.SH AUTHOR
|
|
Greg Hudson, MIT Information Systems
|
|
.br
|
|
Copyright 1998, 2000 by the Massachusetts Institute of Technology.
|