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-rw-r--r--bin/named/lwderror.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/bin/named/lwderror.c b/bin/named/lwderror.c
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+++ b/bin/named/lwderror.c
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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);
+}