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71 lines
2 KiB
C
71 lines
2 KiB
C
/*
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* Copyright (C) 2000, 2001, 2004, 2005, 2007, 2016 Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/* $Id: lwderror.c,v 1.12 2007/06/19 23:46:59 tbox Exp $ */
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/*! \file */
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#include <config.h>
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#include <isc/socket.h>
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#include <isc/util.h>
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#include <named/types.h>
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#include <named/lwdclient.h>
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/*%
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* Generate an error packet for the client, schedule a send, and put us in
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* the SEND state.
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*
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* The client->pkt structure will be modified to form an error return.
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* The receiver needs to verify that it is in fact an error, and do the
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* right thing with it. The opcode will be unchanged. The result needs
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* to be set before calling this function.
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*
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* The only change this code makes is to set the receive buffer size to the
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* size we use, set the reply bit, and recompute any security information.
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*/
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void
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ns_lwdclient_errorpktsend(ns_lwdclient_t *client, isc_uint32_t _result) {
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isc_result_t result;
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int lwres;
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isc_region_t r;
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lwres_buffer_t b;
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REQUIRE(NS_LWDCLIENT_ISRUNNING(client));
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/*
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* Since we are only sending the packet header, we can safely toss
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* the receive buffer. This means we won't need to allocate space
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* for sending an error reply. This is a Good Thing.
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*/
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client->pkt.length = LWRES_LWPACKET_LENGTH;
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client->pkt.pktflags |= LWRES_LWPACKETFLAG_RESPONSE;
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client->pkt.recvlength = LWRES_RECVLENGTH;
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client->pkt.authtype = 0; /* XXXMLG */
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client->pkt.authlength = 0;
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client->pkt.result = _result;
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lwres_buffer_init(&b, client->buffer, LWRES_RECVLENGTH);
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lwres = lwres_lwpacket_renderheader(&b, &client->pkt);
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if (lwres != LWRES_R_SUCCESS) {
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ns_lwdclient_stateidle(client);
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return;
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}
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r.base = client->buffer;
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r.length = b.used;
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client->sendbuf = client->buffer;
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result = ns_lwdclient_sendreply(client, &r);
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if (result != ISC_R_SUCCESS) {
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ns_lwdclient_stateidle(client);
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return;
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}
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NS_LWDCLIENT_SETSEND(client);
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}
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