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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/* $Id: lwderror.c,v 1.12 2007/06/19 23:46:59 tbox Exp $ */
/*! \file */
#include <config.h>
#include <isc/socket.h>
#include <isc/util.h>
#include <named/types.h>
#include <named/lwdclient.h>
/*%
* Generate an error packet for the client, schedule a send, and put us in
* the SEND state.
*
* The client->pkt structure will be modified to form an error return.
* The receiver needs to verify that it is in fact an error, and do the
* right thing with it. The opcode will be unchanged. The result needs
* to be set before calling this function.
*
* The only change this code makes is to set the receive buffer size to the
* size we use, set the reply bit, and recompute any security information.
*/
void
ns_lwdclient_errorpktsend(ns_lwdclient_t *client, uint32_t _result) {
isc_result_t result;
int lwres;
isc_region_t r;
lwres_buffer_t b;
REQUIRE(NS_LWDCLIENT_ISRUNNING(client));
/*
* Since we are only sending the packet header, we can safely toss
* the receive buffer. This means we won't need to allocate space
* for sending an error reply. This is a Good Thing.
*/
client->pkt.length = LWRES_LWPACKET_LENGTH;
client->pkt.pktflags |= LWRES_LWPACKETFLAG_RESPONSE;
client->pkt.recvlength = LWRES_RECVLENGTH;
client->pkt.authtype = 0; /* XXXMLG */
client->pkt.authlength = 0;
client->pkt.result = _result;
lwres_buffer_init(&b, client->buffer, LWRES_RECVLENGTH);
lwres = lwres_lwpacket_renderheader(&b, &client->pkt);
if (lwres != LWRES_R_SUCCESS) {
ns_lwdclient_stateidle(client);
return;
}
r.base = client->buffer;
r.length = b.used;
client->sendbuf = client->buffer;
result = ns_lwdclient_sendreply(client, &r);
if (result != ISC_R_SUCCESS) {
ns_lwdclient_stateidle(client);
return;
}
NS_LWDCLIENT_SETSEND(client);
}
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