1 /* 2 * iterator/iter_scrub.h - scrubbing, normalization, sanitization of DNS msgs. 3 * 4 * Copyright (c) 2007, NLnet Labs. All rights reserved. 5 * 6 * This software is open source. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * Redistributions in binary form must reproduce the above copyright notice, 16 * this list of conditions and the following disclaimer in the documentation 17 * and/or other materials provided with the distribution. 18 * 19 * Neither the name of the NLNET LABS nor the names of its contributors may 20 * be used to endorse or promote products derived from this software without 21 * specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /** 37 * \file 38 * 39 * This file has routine(s) for cleaning up incoming DNS messages from 40 * possible useless or malicious junk in it. 41 */ 42 43 #ifndef ITERATOR_ITER_SCRUB_H 44 #define ITERATOR_ITER_SCRUB_H 45 struct sldns_buffer; 46 struct msg_parse; 47 struct query_info; 48 struct regional; 49 struct module_env; 50 struct iter_env; 51 52 /** 53 * Cleanup the passed dns message. 54 * @param pkt: the packet itself, for resolving name compression pointers. 55 * the packet buffer is unaltered. 56 * @param msg: the parsed packet, this structure is cleaned up. 57 * @param qinfo: the query info that was sent to the server. Checked. 58 * @param zonename: the name of the last delegation point. 59 * Used to determine out of bailiwick information. 60 * @param regional: where to allocate (new) parts of the message. 61 * @param env: module environment with config settings and cache. 62 * @param ie: iterator module environment data. 63 * @return: false if the message is total waste. true if scrubbed with success. 64 */ 65 int scrub_message(struct sldns_buffer* pkt, struct msg_parse* msg, 66 struct query_info* qinfo, uint8_t* zonename, struct regional* regional, 67 struct module_env* env, struct iter_env* ie); 68 69 #endif /* ITERATOR_ITER_SCRUB_H */ 70