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-.\" $Id$
-.\"
-.\" Copyright 1998 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_SEARCH 3 "24 July 1998"
-.SH NAME
-ares_search \- Initiate a DNS query with domain search
-.SH SYNOPSIS
-.nf
-.B #include <ares.h>
-.PP
-.B typedef void (*ares_callback)(void *\fIarg\fP, int \fIstatus\fP,
-.B	int \fItimeouts\fP, unsigned char *\fIabuf\fP, int \fIalen\fP)
-.PP
-.B void ares_search(ares_channel \fIchannel\fP, const char *\fIname\fP,
-.B 	int \fIdnsclass\fP, int \fItype\fP, ares_callback \fIcallback\fP,
-.B	void *\fIarg\fP)
-.fi
-.SH DESCRIPTION
-The
-.B ares_search
-function initiates a series of single-question DNS queries on the name
-service channel identified by
-.IR channel ,
-using the channel's search domains as well as a host alias file given
-by the HOSTALIAS environment variable.  The parameter
-.I name
-gives the alias name or the base of the query name as a NUL-terminated
-C string of period-separated labels; if it ends with a period, the
-channel's search domains will not be used.  Periods and backslashes
-within a label must be escaped with a backslash.  The parameters
-.I dnsclass
-and
-.I type
-give the class and type of the query using the values defined in
-.BR <arpa/nameser.h> .
-When the query sequence is complete or has failed, the ares library
-will invoke
-.IR callback .
-Completion or failure of the query sequence may happen immediately, or
-may happen during a later call to
-.BR ares_process (3)
-or
-.BR ares_destroy (3).
-.PP
-The callback argument
-.I arg
-is copied from the
-.B ares_search
-argument
-.IR arg .
-The callback argument
-.I status
-indicates whether the query sequence ended with a successful query
-and, if not, how the query sequence failed.  It may have any of the
-following values:
-.TP 19
-.B ARES_SUCCESS
-A query completed successfully.
-.TP 19
-.B ARES_ENODATA
-No query completed successfully; when the query was tried without a
-search domain appended, a response was returned with no answers.
-.TP 19
-.B ARES_EFORMERR
-A query completed but the server claimed that the query was
-malformatted.
-.TP 19
-.B ARES_ESERVFAIL
-No query completed successfully; when the query was tried without a
-search domain appended, the server claimed to have experienced a
-failure.  (This code can only occur if the
-.B ARES_FLAG_NOCHECKRESP
-flag was specified at channel initialization time; otherwise, such
-responses are ignored at the
-.BR ares_send (3)
-level.)
-.TP 19
-.B ARES_ENOTFOUND
-No query completed successfully; when the query was tried without a
-search domain appended, the server reported that the queried-for
-domain name was not found.
-.TP 19
-.B ARES_ENOTIMP
-A query completed but the server does not implement the operation
-requested by the query.  (This code can only occur if the
-.B ARES_FLAG_NOCHECKRESP
-flag was specified at channel initialization time; otherwise, such
-responses are ignored at the
-.BR ares_send (3)
-level.)
-.TP 19
-.B ARES_EREFUSED
-A query completed but the server refused the query.  (This code can
-only occur returned if the
-.B ARES_FLAG_NOCHECKRESP
-flag was specified at channel initialization time; otherwise, such
-responses are ignored at the
-.BR ares_send (3)
-level.)
-.TP 19
-.B ARES_TIMEOUT
-No name servers responded to a query within the timeout period.
-.TP 19
-.B ARES_ECONNREFUSED
-No name servers could be contacted.
-.TP 19
-.B ARES_ENOMEM
-Memory was exhausted.
-.TP 19
-.B ARES_EDESTRUCTION
-The name service channel
-.I channel
-is being destroyed; the query will not be completed.
-.PP
-The callback argument
-.I timeouts
-reports how many times a query timed out during the execution of the
-given request.
-.PP
-If a query completed successfully, the callback argument
-.I abuf
-points to a result buffer of length
-.IR alen .
-If the query did not complete successfully,
-.I abuf
-will usually be NULL and
-.I alen
-will usually be 0, but in some cases an unsuccessful query result may
-be placed in
-.IR abuf .
-.SH SEE ALSO
-.BR ares_process (3)
-.SH AUTHOR
-Greg Hudson, MIT Information Systems
-.br
-Copyright 1998 by the Massachusetts Institute of Technology.