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Dirk Manske's ares_cancel() function was added.
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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_CANCEL 3 "31 March 2004" | ||
.SH NAME | ||
ares_cancel \- Cancel a resolve | ||
.SH SYNOPSIS | ||
.nf | ||
.B #include <ares.h> | ||
.PP | ||
.B int ares_cancel(ares_channel \fIchannel\fP) | ||
.fi | ||
.SH DESCRIPTION | ||
The \fBares_cancel\fP function cancels all lookups/requests made on the the | ||
name service channel identified by \fIchannel\fP. \fBares_cancel\fP invokes | ||
the callbacks for each pending query on the channel, passing a status of | ||
.BR ARES_ETIMEOUT . | ||
These calls give the callbacks a chance to clean up any state which | ||
might have been stored in their arguments. | ||
.SH SEE ALSO | ||
.BR ares_init (3) | ||
.BR ares_destroy (3) | ||
.SH AUTHOR | ||
Dirk Manske |
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/* 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. | ||
*/ | ||
|
||
#include <stdlib.h> | ||
#include "ares.h" | ||
#include "ares_private.h" | ||
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/* | ||
* ares_cancel() cancels a ongoing request/resolve that might be going on on | ||
* the given channel. It does NOT kill the channel, use ares_destroy() for | ||
* that. | ||
*/ | ||
void ares_cancel(ares_channel channel) | ||
{ | ||
struct query *query, *next; | ||
int i; | ||
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for (query = channel->queries; query; query = next) | ||
{ | ||
next = query->next; | ||
query->callback(query->arg, ARES_ETIMEOUT, NULL, 0); | ||
free(query->tcpbuf); | ||
free(query->skip_server); | ||
free(query); | ||
} | ||
channel->queries = NULL; | ||
if (!(channel->flags & ARES_FLAG_STAYOPEN)) | ||
{ | ||
for (i = 0; i < channel->nservers; i++) | ||
ares__close_sockets(&channel->servers[i]); | ||
} | ||
} |