878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington/*
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Copyright (C) 2000, 2001, 2004, 2005, 2007, 2016 Internet Systems Consortium, Inc. ("ISC")
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence *
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * This Source Code Form is subject to the terms of the Mozilla Public
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * License, v. 2.0. If a copy of the MPL was not distributed with this
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * file, You can obtain one at http://mozilla.org/MPL/2.0/.
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington */
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
70e5a7403f0e0a3bd292b8287c5fed5772c15270Automatic Updater/* $Id: lwderror.c,v 1.12 2007/06/19 23:46:59 tbox Exp $ */
ab023a65562e62b85a824509d829b6fad87e00b1Rob Austein
ab023a65562e62b85a824509d829b6fad87e00b1Rob Austein/*! \file */
9c3531d72aeaad6c5f01efe6a1c82023e1379e4dDavid Lawrence
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington#include <config.h>
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington#include <isc/socket.h>
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington#include <isc/util.h>
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington#include <named/types.h>
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington#include <named/lwdclient.h>
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
ab023a65562e62b85a824509d829b6fad87e00b1Rob Austein/*%
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * Generate an error packet for the client, schedule a send, and put us in
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * the SEND state.
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington *
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * The client->pkt structure will be modified to form an error return.
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * The receiver needs to verify that it is in fact an error, and do the
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * right thing with it. The opcode will be unchanged. The result needs
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * to be set before calling this function.
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington *
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * The only change this code makes is to set the receive buffer size to the
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * size we use, set the reply bit, and recompute any security information.
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington */
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellingtonvoid
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellingtonns_lwdclient_errorpktsend(ns_lwdclient_t *client, isc_uint32_t _result) {
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington isc_result_t result;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington int lwres;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington isc_region_t r;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington lwres_buffer_t b;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington REQUIRE(NS_LWDCLIENT_ISRUNNING(client));
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington /*
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * Since we are only sending the packet header, we can safely toss
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * the receive buffer. This means we won't need to allocate space
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington * for sending an error reply. This is a Good Thing.
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington */
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->pkt.length = LWRES_LWPACKET_LENGTH;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->pkt.pktflags |= LWRES_LWPACKETFLAG_RESPONSE;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->pkt.recvlength = LWRES_RECVLENGTH;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->pkt.authtype = 0; /* XXXMLG */
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->pkt.authlength = 0;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->pkt.result = _result;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington lwres_buffer_init(&b, client->buffer, LWRES_RECVLENGTH);
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington lwres = lwres_lwpacket_renderheader(&b, &client->pkt);
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington if (lwres != LWRES_R_SUCCESS) {
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington ns_lwdclient_stateidle(client);
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington return;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington }
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington r.base = client->buffer;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington r.length = b.used;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington client->sendbuf = client->buffer;
50980039820700108f1f5eef1e42aa998a44f087Brian Wellington result = ns_lwdclient_sendreply(client, &r);
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington if (result != ISC_R_SUCCESS) {
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington ns_lwdclient_stateidle(client);
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington return;
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington }
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington NS_LWDCLIENT_SETSEND(client);
878d3073b13833ee1a50dfeabf8e400b6fdfc754Brian Wellington}