24e3652200
This vendor import was requested by glebius@ as it should fix unbound crashes. Reported by: glebius MFC after: 1 week
136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
/*
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* util/edns.c - handle base EDNS options.
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*
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* Copyright (c) 2018, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains functions for base EDNS options.
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*/
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#include "config.h"
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#include "util/edns.h"
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#include "util/config_file.h"
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#include "util/netevent.h"
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#include "util/net_help.h"
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#include "util/regional.h"
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#include "util/data/msgparse.h"
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#include "util/data/msgreply.h"
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#if 0
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/* XXX: remove me */
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#include "edns.h"
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#endif
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struct edns_strings* edns_strings_create(void)
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{
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struct edns_strings* edns_strings = calloc(1,
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sizeof(struct edns_strings));
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if(!edns_strings)
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return NULL;
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if(!(edns_strings->region = regional_create())) {
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edns_strings_delete(edns_strings);
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return NULL;
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}
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return edns_strings;
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}
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void edns_strings_delete(struct edns_strings* edns_strings)
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{
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if(!edns_strings)
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return;
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regional_destroy(edns_strings->region);
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free(edns_strings);
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}
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static int
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edns_strings_client_insert(struct edns_strings* edns_strings,
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struct sockaddr_storage* addr, socklen_t addrlen, int net,
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const char* string)
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{
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struct edns_string_addr* esa = regional_alloc_zero(edns_strings->region,
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sizeof(struct edns_string_addr));
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if(!esa)
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return 0;
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esa->string_len = strlen(string);
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esa->string = regional_alloc_init(edns_strings->region, string,
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esa->string_len);
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if(!esa->string)
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return 0;
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if(!addr_tree_insert(&edns_strings->client_strings, &esa->node, addr,
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addrlen, net)) {
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verbose(VERB_QUERY, "duplicate EDNS client string ignored.");
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}
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return 1;
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}
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int edns_strings_apply_cfg(struct edns_strings* edns_strings,
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struct config_file* config)
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{
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struct config_str2list* c;
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regional_free_all(edns_strings->region);
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addr_tree_init(&edns_strings->client_strings);
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for(c=config->edns_client_strings; c; c=c->next) {
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struct sockaddr_storage addr;
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socklen_t addrlen;
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int net;
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log_assert(c->str && c->str2);
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if(!netblockstrtoaddr(c->str, UNBOUND_DNS_PORT, &addr, &addrlen,
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&net)) {
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log_err("cannot parse EDNS client string IP netblock: "
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"%s", c->str);
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return 0;
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}
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if(!edns_strings_client_insert(edns_strings, &addr, addrlen,
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net, c->str2)) {
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log_err("out of memory while adding EDNS strings");
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return 0;
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}
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}
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edns_strings->client_string_opcode = config->edns_client_string_opcode;
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addr_tree_init_parents(&edns_strings->client_strings);
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return 1;
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}
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struct edns_string_addr*
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edns_string_addr_lookup(rbtree_type* tree, struct sockaddr_storage* addr,
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socklen_t addrlen)
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{
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return (struct edns_string_addr*)addr_tree_lookup(tree, addr, addrlen);
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}
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