1/* $NetBSD: lwderror.c,v 1.2.6.1 2012/06/05 21:15:20 bouyer Exp $ */ 2 3/* 4 * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 2000, 2001 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20/* Id: lwderror.c,v 1.12 2007/06/19 23:46:59 tbox Exp */ 21 22/*! \file */ 23 24#include <config.h> 25 26#include <isc/socket.h> 27#include <isc/util.h> 28 29#include <named/types.h> 30#include <named/lwdclient.h> 31 32/*% 33 * Generate an error packet for the client, schedule a send, and put us in 34 * the SEND state. 35 * 36 * The client->pkt structure will be modified to form an error return. 37 * The receiver needs to verify that it is in fact an error, and do the 38 * right thing with it. The opcode will be unchanged. The result needs 39 * to be set before calling this function. 40 * 41 * The only change this code makes is to set the receive buffer size to the 42 * size we use, set the reply bit, and recompute any security information. 43 */ 44void 45ns_lwdclient_errorpktsend(ns_lwdclient_t *client, isc_uint32_t _result) { 46 isc_result_t result; 47 int lwres; 48 isc_region_t r; 49 lwres_buffer_t b; 50 51 REQUIRE(NS_LWDCLIENT_ISRUNNING(client)); 52 53 /* 54 * Since we are only sending the packet header, we can safely toss 55 * the receive buffer. This means we won't need to allocate space 56 * for sending an error reply. This is a Good Thing. 57 */ 58 client->pkt.length = LWRES_LWPACKET_LENGTH; 59 client->pkt.pktflags |= LWRES_LWPACKETFLAG_RESPONSE; 60 client->pkt.recvlength = LWRES_RECVLENGTH; 61 client->pkt.authtype = 0; /* XXXMLG */ 62 client->pkt.authlength = 0; 63 client->pkt.result = _result; 64 65 lwres_buffer_init(&b, client->buffer, LWRES_RECVLENGTH); 66 lwres = lwres_lwpacket_renderheader(&b, &client->pkt); 67 if (lwres != LWRES_R_SUCCESS) { 68 ns_lwdclient_stateidle(client); 69 return; 70 } 71 72 r.base = client->buffer; 73 r.length = b.used; 74 client->sendbuf = client->buffer; 75 result = ns_lwdclient_sendreply(client, &r); 76 if (result != ISC_R_SUCCESS) { 77 ns_lwdclient_stateidle(client); 78 return; 79 } 80 81 NS_LWDCLIENT_SETSEND(client); 82} 83