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ares_cancel(3)

31 March 2004

libc-ares-dev

asynchronous name resolver - development files

c-ares-devel

Library for asynchronous name resolves

c-ares

C library that performs DNS requests and name resolves asynchronously

libcares-devel

Library for asynchronous name resolves

NAME

ares_cancel - Cancel a resolve

SYNOPSIS

#include <ares.h>

void ares_cancel(ares_channel channel)

DESCRIPTION

The ares_cancel(3) function cancels all lookups/requests made on the the name service channel identified by channel. ares_cancel(3) invokes the callbacks for each pending query on the channel, passing a status of ARES_ECANCELLED. These calls give the callbacks a chance to clean up any state which might have been stored in their arguments. If such a callback invocation adds a new request to the channel, that request will not be cancelled by the current invocation of ares_cancel(3).

NOTES

This function was added in c-ares 1.2.0
c-ares 1.6.0 and earlier pass a status of ARES_ETIMEOUT instead of ARES_ECANCELLED.

AUTHOR

Dirk Manske
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