Reapply643f9a0581
.64d318ea98
was a mismerge during fake rebase. Let's reapply it. Changes include: Added ACL per interface, proxy protocol and bug fixes. Announcement: https://nlnetlabs.nl/news/2022/Oct/13/unbound-1.17.0-released/ Merge commit '643f9a0581e8aac7eb790ced1164748939829826' into main
2420 lines
68 KiB
C
2420 lines
68 KiB
C
/*
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* services/rpz.c - rpz service
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*
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* Copyright (c) 2019, 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 to enable RPZ service.
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*/
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#include "config.h"
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#include "services/rpz.h"
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#include "util/config_file.h"
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#include "sldns/wire2str.h"
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#include "sldns/str2wire.h"
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#include "util/data/dname.h"
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#include "util/net_help.h"
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#include "util/log.h"
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#include "util/data/dname.h"
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#include "util/locks.h"
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#include "util/regional.h"
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#include "util/data/msgencode.h"
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#include "services/cache/dns.h"
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#include "iterator/iterator.h"
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#include "iterator/iter_delegpt.h"
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#include "daemon/worker.h"
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typedef struct resp_addr rpz_aclnode_type;
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struct matched_delegation_point {
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uint8_t* dname;
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size_t dname_len;
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};
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/** string for RPZ action enum */
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const char*
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rpz_action_to_string(enum rpz_action a)
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{
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switch(a) {
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case RPZ_NXDOMAIN_ACTION: return "rpz-nxdomain";
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case RPZ_NODATA_ACTION: return "rpz-nodata";
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case RPZ_PASSTHRU_ACTION: return "rpz-passthru";
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case RPZ_DROP_ACTION: return "rpz-drop";
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case RPZ_TCP_ONLY_ACTION: return "rpz-tcp-only";
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case RPZ_INVALID_ACTION: return "rpz-invalid";
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case RPZ_LOCAL_DATA_ACTION: return "rpz-local-data";
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case RPZ_DISABLED_ACTION: return "rpz-disabled";
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case RPZ_CNAME_OVERRIDE_ACTION: return "rpz-cname-override";
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case RPZ_NO_OVERRIDE_ACTION: return "rpz-no-override";
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default: return "rpz-unknown-action";
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}
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}
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/** RPZ action enum for config string */
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static enum rpz_action
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rpz_config_to_action(char* a)
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{
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if(strcmp(a, "nxdomain") == 0) return RPZ_NXDOMAIN_ACTION;
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else if(strcmp(a, "nodata") == 0) return RPZ_NODATA_ACTION;
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else if(strcmp(a, "passthru") == 0) return RPZ_PASSTHRU_ACTION;
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else if(strcmp(a, "drop") == 0) return RPZ_DROP_ACTION;
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else if(strcmp(a, "tcp_only") == 0) return RPZ_TCP_ONLY_ACTION;
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else if(strcmp(a, "cname") == 0) return RPZ_CNAME_OVERRIDE_ACTION;
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else if(strcmp(a, "disabled") == 0) return RPZ_DISABLED_ACTION;
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else return RPZ_INVALID_ACTION;
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}
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/** string for RPZ trigger enum */
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static const char*
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rpz_trigger_to_string(enum rpz_trigger r)
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{
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switch(r) {
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case RPZ_QNAME_TRIGGER: return "rpz-qname";
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case RPZ_CLIENT_IP_TRIGGER: return "rpz-client-ip";
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case RPZ_RESPONSE_IP_TRIGGER: return "rpz-response-ip";
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case RPZ_NSDNAME_TRIGGER: return "rpz-nsdname";
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case RPZ_NSIP_TRIGGER: return "rpz-nsip";
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case RPZ_INVALID_TRIGGER: return "rpz-invalid";
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default: return "rpz-unknown-trigger";
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}
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}
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/**
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* Get the label that is just before the root label.
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* @param dname: dname to work on
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* @param maxdnamelen: maximum length of the dname
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* @return: pointer to TLD label, NULL if not found or invalid dname
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*/
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static uint8_t*
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get_tld_label(uint8_t* dname, size_t maxdnamelen)
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{
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uint8_t* prevlab = dname;
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size_t dnamelen = 0;
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/* one byte needed for label length */
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if(dnamelen+1 > maxdnamelen)
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return NULL;
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/* only root label */
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if(*dname == 0)
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return NULL;
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while(*dname) {
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dnamelen += ((size_t)*dname)+1;
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if(dnamelen+1 > maxdnamelen)
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return NULL;
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dname = dname+((size_t)*dname)+1;
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if(*dname != 0)
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prevlab = dname;
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}
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return prevlab;
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}
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/**
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* The RR types that are to be ignored.
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* DNSSEC RRs at the apex, and SOA and NS are ignored.
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*/
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static int
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rpz_type_ignored(uint16_t rr_type)
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{
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switch(rr_type) {
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case LDNS_RR_TYPE_SOA:
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case LDNS_RR_TYPE_NS:
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case LDNS_RR_TYPE_DNAME:
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/* all DNSSEC-related RRs must be ignored */
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case LDNS_RR_TYPE_DNSKEY:
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case LDNS_RR_TYPE_DS:
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case LDNS_RR_TYPE_RRSIG:
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case LDNS_RR_TYPE_NSEC:
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case LDNS_RR_TYPE_NSEC3:
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case LDNS_RR_TYPE_NSEC3PARAM:
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return 1;
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default:
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break;
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}
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return 0;
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}
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/**
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* Classify RPZ action for RR type/rdata
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* @param rr_type: the RR type
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* @param rdatawl: RDATA with 2 bytes length
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* @param rdatalen: the length of rdatawl (including its 2 bytes length)
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* @return: the RPZ action
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*/
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static enum rpz_action
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rpz_rr_to_action(uint16_t rr_type, uint8_t* rdatawl, size_t rdatalen)
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{
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char* endptr;
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uint8_t* rdata;
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int rdatalabs;
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uint8_t* tldlab = NULL;
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switch(rr_type) {
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case LDNS_RR_TYPE_SOA:
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case LDNS_RR_TYPE_NS:
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case LDNS_RR_TYPE_DNAME:
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/* all DNSSEC-related RRs must be ignored */
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case LDNS_RR_TYPE_DNSKEY:
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case LDNS_RR_TYPE_DS:
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case LDNS_RR_TYPE_RRSIG:
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case LDNS_RR_TYPE_NSEC:
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case LDNS_RR_TYPE_NSEC3:
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case LDNS_RR_TYPE_NSEC3PARAM:
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return RPZ_INVALID_ACTION;
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case LDNS_RR_TYPE_CNAME:
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break;
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default:
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return RPZ_LOCAL_DATA_ACTION;
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}
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/* use CNAME target to determine RPZ action */
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log_assert(rr_type == LDNS_RR_TYPE_CNAME);
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if(rdatalen < 3)
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return RPZ_INVALID_ACTION;
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rdata = rdatawl + 2; /* 2 bytes of rdata length */
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if(dname_valid(rdata, rdatalen-2) != rdatalen-2)
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return RPZ_INVALID_ACTION;
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rdatalabs = dname_count_labels(rdata);
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if(rdatalabs == 1)
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return RPZ_NXDOMAIN_ACTION;
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else if(rdatalabs == 2) {
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if(dname_subdomain_c(rdata, (uint8_t*)&"\001*\000"))
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return RPZ_NODATA_ACTION;
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else if(dname_subdomain_c(rdata,
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(uint8_t*)&"\014rpz-passthru\000"))
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return RPZ_PASSTHRU_ACTION;
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else if(dname_subdomain_c(rdata, (uint8_t*)&"\010rpz-drop\000"))
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return RPZ_DROP_ACTION;
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else if(dname_subdomain_c(rdata,
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(uint8_t*)&"\014rpz-tcp-only\000"))
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return RPZ_TCP_ONLY_ACTION;
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}
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/* all other TLDs starting with "rpz-" are invalid */
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tldlab = get_tld_label(rdata, rdatalen-2);
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if(tldlab && dname_lab_startswith(tldlab, "rpz-", &endptr))
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return RPZ_INVALID_ACTION;
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/* no special label found */
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return RPZ_LOCAL_DATA_ACTION;
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}
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static enum localzone_type
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rpz_action_to_localzone_type(enum rpz_action a)
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{
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switch(a) {
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case RPZ_NXDOMAIN_ACTION: return local_zone_always_nxdomain;
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case RPZ_NODATA_ACTION: return local_zone_always_nodata;
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case RPZ_DROP_ACTION: return local_zone_always_deny;
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case RPZ_PASSTHRU_ACTION: return local_zone_always_transparent;
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case RPZ_LOCAL_DATA_ACTION: /* fallthrough */
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case RPZ_CNAME_OVERRIDE_ACTION: return local_zone_redirect;
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case RPZ_TCP_ONLY_ACTION: return local_zone_truncate;
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case RPZ_INVALID_ACTION: /* fallthrough */
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default: return local_zone_invalid;
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}
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}
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enum respip_action
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rpz_action_to_respip_action(enum rpz_action a)
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{
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switch(a) {
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case RPZ_NXDOMAIN_ACTION: return respip_always_nxdomain;
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case RPZ_NODATA_ACTION: return respip_always_nodata;
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case RPZ_DROP_ACTION: return respip_always_deny;
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case RPZ_PASSTHRU_ACTION: return respip_always_transparent;
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case RPZ_LOCAL_DATA_ACTION: /* fallthrough */
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case RPZ_CNAME_OVERRIDE_ACTION: return respip_redirect;
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case RPZ_TCP_ONLY_ACTION: return respip_truncate;
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case RPZ_INVALID_ACTION: /* fallthrough */
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default: return respip_invalid;
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}
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}
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static enum rpz_action
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localzone_type_to_rpz_action(enum localzone_type lzt)
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{
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switch(lzt) {
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case local_zone_always_nxdomain: return RPZ_NXDOMAIN_ACTION;
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case local_zone_always_nodata: return RPZ_NODATA_ACTION;
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case local_zone_always_deny: return RPZ_DROP_ACTION;
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case local_zone_always_transparent: return RPZ_PASSTHRU_ACTION;
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case local_zone_redirect: return RPZ_LOCAL_DATA_ACTION;
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case local_zone_truncate: return RPZ_TCP_ONLY_ACTION;
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case local_zone_invalid: /* fallthrough */
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default: return RPZ_INVALID_ACTION;
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}
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}
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enum rpz_action
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respip_action_to_rpz_action(enum respip_action a)
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{
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switch(a) {
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case respip_always_nxdomain: return RPZ_NXDOMAIN_ACTION;
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case respip_always_nodata: return RPZ_NODATA_ACTION;
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case respip_always_deny: return RPZ_DROP_ACTION;
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case respip_always_transparent: return RPZ_PASSTHRU_ACTION;
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case respip_redirect: return RPZ_LOCAL_DATA_ACTION;
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case respip_truncate: return RPZ_TCP_ONLY_ACTION;
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case respip_invalid: /* fallthrough */
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default: return RPZ_INVALID_ACTION;
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}
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}
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/**
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* Get RPZ trigger for dname
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* @param dname: dname containing RPZ trigger
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* @param dname_len: length of the dname
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* @return: RPZ trigger enum
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*/
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static enum rpz_trigger
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rpz_dname_to_trigger(uint8_t* dname, size_t dname_len)
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{
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uint8_t* tldlab;
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char* endptr;
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if(dname_valid(dname, dname_len) != dname_len)
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return RPZ_INVALID_TRIGGER;
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tldlab = get_tld_label(dname, dname_len);
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if(!tldlab || !dname_lab_startswith(tldlab, "rpz-", &endptr))
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return RPZ_QNAME_TRIGGER;
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if(dname_subdomain_c(tldlab,
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(uint8_t*)&"\015rpz-client-ip\000"))
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return RPZ_CLIENT_IP_TRIGGER;
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else if(dname_subdomain_c(tldlab, (uint8_t*)&"\006rpz-ip\000"))
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return RPZ_RESPONSE_IP_TRIGGER;
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else if(dname_subdomain_c(tldlab, (uint8_t*)&"\013rpz-nsdname\000"))
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return RPZ_NSDNAME_TRIGGER;
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else if(dname_subdomain_c(tldlab, (uint8_t*)&"\010rpz-nsip\000"))
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return RPZ_NSIP_TRIGGER;
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return RPZ_QNAME_TRIGGER;
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}
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static inline struct clientip_synthesized_rrset*
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rpz_clientip_synthesized_set_create(void)
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{
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struct clientip_synthesized_rrset* set = calloc(1, sizeof(*set));
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if(set == NULL) {
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return NULL;
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}
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set->region = regional_create();
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if(set->region == NULL) {
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free(set);
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return NULL;
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}
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addr_tree_init(&set->entries);
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lock_rw_init(&set->lock);
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return set;
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}
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static void
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rpz_clientip_synthesized_rr_delete(rbnode_type* n, void* ATTR_UNUSED(arg))
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{
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struct clientip_synthesized_rr* r = (struct clientip_synthesized_rr*)n->key;
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lock_rw_destroy(&r->lock);
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#ifdef THREADS_DISABLED
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(void)r;
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#endif
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}
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static inline void
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rpz_clientip_synthesized_set_delete(struct clientip_synthesized_rrset* set)
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{
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if(set == NULL) {
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return;
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}
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lock_rw_destroy(&set->lock);
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traverse_postorder(&set->entries, rpz_clientip_synthesized_rr_delete, NULL);
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regional_destroy(set->region);
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free(set);
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}
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void
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rpz_delete(struct rpz* r)
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{
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if(!r)
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return;
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local_zones_delete(r->local_zones);
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local_zones_delete(r->nsdname_zones);
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respip_set_delete(r->respip_set);
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rpz_clientip_synthesized_set_delete(r->client_set);
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rpz_clientip_synthesized_set_delete(r->ns_set);
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regional_destroy(r->region);
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free(r->taglist);
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free(r->log_name);
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free(r);
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}
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int
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rpz_clear(struct rpz* r)
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{
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/* must hold write lock on auth_zone */
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local_zones_delete(r->local_zones);
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r->local_zones = NULL;
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local_zones_delete(r->nsdname_zones);
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r->nsdname_zones = NULL;
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respip_set_delete(r->respip_set);
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r->respip_set = NULL;
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rpz_clientip_synthesized_set_delete(r->client_set);
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r->client_set = NULL;
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rpz_clientip_synthesized_set_delete(r->ns_set);
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r->ns_set = NULL;
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if(!(r->local_zones = local_zones_create())){
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return 0;
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}
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r->nsdname_zones = local_zones_create();
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if(r->nsdname_zones == NULL) {
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return 0;
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}
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if(!(r->respip_set = respip_set_create())) {
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return 0;
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}
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if(!(r->client_set = rpz_clientip_synthesized_set_create())) {
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return 0;
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}
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if(!(r->ns_set = rpz_clientip_synthesized_set_create())) {
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return 0;
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}
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return 1;
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}
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void
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rpz_finish_config(struct rpz* r)
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{
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lock_rw_wrlock(&r->respip_set->lock);
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addr_tree_init_parents(&r->respip_set->ip_tree);
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lock_rw_unlock(&r->respip_set->lock);
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lock_rw_wrlock(&r->client_set->lock);
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addr_tree_init_parents(&r->client_set->entries);
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lock_rw_unlock(&r->client_set->lock);
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lock_rw_wrlock(&r->ns_set->lock);
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addr_tree_init_parents(&r->ns_set->entries);
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lock_rw_unlock(&r->ns_set->lock);
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}
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/** new rrset containing CNAME override, does not yet contain a dname */
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static struct ub_packed_rrset_key*
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new_cname_override(struct regional* region, uint8_t* ct, size_t ctlen)
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{
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struct ub_packed_rrset_key* rrset;
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struct packed_rrset_data* pd;
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uint16_t rdlength = htons(ctlen);
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rrset = (struct ub_packed_rrset_key*)regional_alloc_zero(region,
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sizeof(*rrset));
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if(!rrset) {
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log_err("out of memory");
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return NULL;
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}
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rrset->entry.key = rrset;
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pd = (struct packed_rrset_data*)regional_alloc_zero(region, sizeof(*pd));
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if(!pd) {
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log_err("out of memory");
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return NULL;
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}
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pd->trust = rrset_trust_prim_noglue;
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pd->security = sec_status_insecure;
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pd->count = 1;
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pd->rr_len = regional_alloc_zero(region, sizeof(*pd->rr_len));
|
|
pd->rr_ttl = regional_alloc_zero(region, sizeof(*pd->rr_ttl));
|
|
pd->rr_data = regional_alloc_zero(region, sizeof(*pd->rr_data));
|
|
if(!pd->rr_len || !pd->rr_ttl || !pd->rr_data) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
pd->rr_len[0] = ctlen+2;
|
|
pd->rr_ttl[0] = 3600;
|
|
pd->rr_data[0] = regional_alloc_zero(region, 2 /* rdlength */ + ctlen);
|
|
if(!pd->rr_data[0]) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
memmove(pd->rr_data[0], &rdlength, 2);
|
|
memmove(pd->rr_data[0]+2, ct, ctlen);
|
|
|
|
rrset->entry.data = pd;
|
|
rrset->rk.type = htons(LDNS_RR_TYPE_CNAME);
|
|
rrset->rk.rrset_class = htons(LDNS_RR_CLASS_IN);
|
|
return rrset;
|
|
}
|
|
|
|
struct rpz*
|
|
rpz_create(struct config_auth* p)
|
|
{
|
|
struct rpz* r = calloc(1, sizeof(*r));
|
|
if(!r)
|
|
goto err;
|
|
|
|
r->region = regional_create_custom(sizeof(struct regional));
|
|
if(!r->region) {
|
|
goto err;
|
|
}
|
|
|
|
if(!(r->local_zones = local_zones_create())){
|
|
goto err;
|
|
}
|
|
|
|
r->nsdname_zones = local_zones_create();
|
|
if(r->local_zones == NULL){
|
|
goto err;
|
|
}
|
|
|
|
if(!(r->respip_set = respip_set_create())) {
|
|
goto err;
|
|
}
|
|
|
|
r->client_set = rpz_clientip_synthesized_set_create();
|
|
if(r->client_set == NULL) {
|
|
goto err;
|
|
}
|
|
|
|
r->ns_set = rpz_clientip_synthesized_set_create();
|
|
if(r->ns_set == NULL) {
|
|
goto err;
|
|
}
|
|
|
|
r->taglistlen = p->rpz_taglistlen;
|
|
r->taglist = memdup(p->rpz_taglist, r->taglistlen);
|
|
if(p->rpz_action_override) {
|
|
r->action_override = rpz_config_to_action(p->rpz_action_override);
|
|
}
|
|
else
|
|
r->action_override = RPZ_NO_OVERRIDE_ACTION;
|
|
|
|
if(r->action_override == RPZ_CNAME_OVERRIDE_ACTION) {
|
|
uint8_t nm[LDNS_MAX_DOMAINLEN+1];
|
|
size_t nmlen = sizeof(nm);
|
|
|
|
if(!p->rpz_cname) {
|
|
log_err("rpz: override with cname action found, but no "
|
|
"rpz-cname-override configured");
|
|
goto err;
|
|
}
|
|
|
|
if(sldns_str2wire_dname_buf(p->rpz_cname, nm, &nmlen) != 0) {
|
|
log_err("rpz: cannot parse cname override: %s",
|
|
p->rpz_cname);
|
|
goto err;
|
|
}
|
|
r->cname_override = new_cname_override(r->region, nm, nmlen);
|
|
if(!r->cname_override) {
|
|
goto err;
|
|
}
|
|
}
|
|
r->log = p->rpz_log;
|
|
r->signal_nxdomain_ra = p->rpz_signal_nxdomain_ra;
|
|
if(p->rpz_log_name) {
|
|
if(!(r->log_name = strdup(p->rpz_log_name))) {
|
|
log_err("malloc failure on RPZ log_name strdup");
|
|
goto err;
|
|
}
|
|
}
|
|
return r;
|
|
err:
|
|
if(r) {
|
|
if(r->local_zones)
|
|
local_zones_delete(r->local_zones);
|
|
if(r->nsdname_zones)
|
|
local_zones_delete(r->nsdname_zones);
|
|
if(r->respip_set)
|
|
respip_set_delete(r->respip_set);
|
|
if(r->client_set != NULL)
|
|
rpz_clientip_synthesized_set_delete(r->client_set);
|
|
if(r->ns_set != NULL)
|
|
rpz_clientip_synthesized_set_delete(r->ns_set);
|
|
if(r->taglist)
|
|
free(r->taglist);
|
|
if(r->region)
|
|
regional_destroy(r->region);
|
|
free(r);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Remove RPZ zone name from dname
|
|
* Copy dname to newdname, without the originlen number of trailing bytes
|
|
*/
|
|
static size_t
|
|
strip_dname_origin(uint8_t* dname, size_t dnamelen, size_t originlen,
|
|
uint8_t* newdname, size_t maxnewdnamelen)
|
|
{
|
|
size_t newdnamelen;
|
|
if(dnamelen < originlen)
|
|
return 0;
|
|
newdnamelen = dnamelen - originlen;
|
|
if(newdnamelen+1 > maxnewdnamelen)
|
|
return 0;
|
|
memmove(newdname, dname, newdnamelen);
|
|
newdname[newdnamelen] = 0;
|
|
return newdnamelen + 1; /* + 1 for root label */
|
|
}
|
|
|
|
static void
|
|
rpz_insert_local_zones_trigger(struct local_zones* lz, uint8_t* dname,
|
|
size_t dnamelen, enum rpz_action a, uint16_t rrtype, uint16_t rrclass,
|
|
uint32_t ttl, uint8_t* rdata, size_t rdata_len, uint8_t* rr, size_t rr_len)
|
|
{
|
|
struct local_zone* z;
|
|
enum localzone_type tp = local_zone_always_transparent;
|
|
int dnamelabs = dname_count_labels(dname);
|
|
int newzone = 0;
|
|
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
char str[255+1];
|
|
if(rrtype == LDNS_RR_TYPE_SOA || rrtype == LDNS_RR_TYPE_NS ||
|
|
rrtype == LDNS_RR_TYPE_DNAME ||
|
|
rrtype == LDNS_RR_TYPE_DNSKEY ||
|
|
rrtype == LDNS_RR_TYPE_RRSIG ||
|
|
rrtype == LDNS_RR_TYPE_NSEC ||
|
|
rrtype == LDNS_RR_TYPE_NSEC3PARAM ||
|
|
rrtype == LDNS_RR_TYPE_NSEC3 ||
|
|
rrtype == LDNS_RR_TYPE_DS) {
|
|
free(dname);
|
|
return; /* no need to log these types as unsupported */
|
|
}
|
|
dname_str(dname, str);
|
|
verbose(VERB_ALGO, "rpz: qname trigger, %s skipping unsupported action: %s",
|
|
str, rpz_action_to_string(a));
|
|
free(dname);
|
|
return;
|
|
}
|
|
|
|
lock_rw_wrlock(&lz->lock);
|
|
/* exact match */
|
|
z = local_zones_find(lz, dname, dnamelen, dnamelabs, LDNS_RR_CLASS_IN);
|
|
if(z != NULL && a != RPZ_LOCAL_DATA_ACTION) {
|
|
char* rrstr = sldns_wire2str_rr(rr, rr_len);
|
|
if(rrstr == NULL) {
|
|
log_err("malloc error while inserting rpz nsdname trigger");
|
|
free(dname);
|
|
lock_rw_unlock(&lz->lock);
|
|
return;
|
|
}
|
|
if(rrstr[0])
|
|
rrstr[strlen(rrstr)-1]=0; /* remove newline */
|
|
verbose(VERB_ALGO, "rpz: skipping duplicate record: '%s'", rrstr);
|
|
free(rrstr);
|
|
free(dname);
|
|
lock_rw_unlock(&lz->lock);
|
|
return;
|
|
}
|
|
if(z == NULL) {
|
|
tp = rpz_action_to_localzone_type(a);
|
|
z = local_zones_add_zone(lz, dname, dnamelen,
|
|
dnamelabs, rrclass, tp);
|
|
if(z == NULL) {
|
|
log_warn("rpz: create failed");
|
|
lock_rw_unlock(&lz->lock);
|
|
/* dname will be free'd in failed local_zone_create() */
|
|
return;
|
|
}
|
|
newzone = 1;
|
|
}
|
|
if(a == RPZ_LOCAL_DATA_ACTION) {
|
|
char* rrstr = sldns_wire2str_rr(rr, rr_len);
|
|
if(rrstr == NULL) {
|
|
log_err("malloc error while inserting rpz nsdname trigger");
|
|
free(dname);
|
|
lock_rw_unlock(&lz->lock);
|
|
return;
|
|
}
|
|
lock_rw_wrlock(&z->lock);
|
|
local_zone_enter_rr(z, dname, dnamelen, dnamelabs, rrtype,
|
|
rrclass, ttl, rdata, rdata_len, rrstr);
|
|
lock_rw_unlock(&z->lock);
|
|
free(rrstr);
|
|
}
|
|
if(!newzone) {
|
|
free(dname);
|
|
}
|
|
lock_rw_unlock(&lz->lock);
|
|
}
|
|
|
|
static void
|
|
rpz_log_dname(char const* msg, uint8_t* dname, size_t dname_len)
|
|
{
|
|
char buf[LDNS_MAX_DOMAINLEN+1];
|
|
(void)dname_len;
|
|
dname_str(dname, buf);
|
|
verbose(VERB_ALGO, "rpz: %s: <%s>", msg, buf);
|
|
}
|
|
|
|
static void
|
|
rpz_insert_qname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rrtype, uint16_t rrclass, uint32_t ttl,
|
|
uint8_t* rdata, size_t rdata_len, uint8_t* rr, size_t rr_len)
|
|
{
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
verbose(VERB_ALGO, "rpz: skipping invalid action");
|
|
free(dname);
|
|
return;
|
|
}
|
|
|
|
rpz_insert_local_zones_trigger(r->local_zones, dname, dnamelen, a, rrtype,
|
|
rrclass, ttl, rdata, rdata_len, rr, rr_len);
|
|
}
|
|
|
|
static int
|
|
rpz_strip_nsdname_suffix(uint8_t* dname, size_t maxdnamelen,
|
|
uint8_t** stripdname, size_t* stripdnamelen)
|
|
{
|
|
uint8_t* tldstart = get_tld_label(dname, maxdnamelen);
|
|
uint8_t swap;
|
|
if(tldstart == NULL) {
|
|
if(dname == NULL) {
|
|
*stripdname = NULL;
|
|
*stripdnamelen = 0;
|
|
return 0;
|
|
}
|
|
*stripdname = memdup(dname, maxdnamelen);
|
|
if(!*stripdname) {
|
|
*stripdnamelen = 0;
|
|
log_err("malloc failure for rpz strip suffix");
|
|
return 0;
|
|
}
|
|
*stripdnamelen = maxdnamelen;
|
|
return 1;
|
|
}
|
|
/* shorten the domain name briefly,
|
|
* then we allocate a new name with the correct length */
|
|
swap = *tldstart;
|
|
*tldstart = 0;
|
|
(void)dname_count_size_labels(dname, stripdnamelen);
|
|
*stripdname = memdup(dname, *stripdnamelen);
|
|
*tldstart = swap;
|
|
if(!*stripdname) {
|
|
*stripdnamelen = 0;
|
|
log_err("malloc failure for rpz strip suffix");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
rpz_insert_nsdname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rrtype, uint16_t rrclass, uint32_t ttl,
|
|
uint8_t* rdata, size_t rdata_len, uint8_t* rr, size_t rr_len)
|
|
{
|
|
uint8_t* dname_stripped = NULL;
|
|
size_t dnamelen_stripped = 0;
|
|
|
|
rpz_strip_nsdname_suffix(dname, dnamelen, &dname_stripped,
|
|
&dnamelen_stripped);
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
verbose(VERB_ALGO, "rpz: skipping invalid action");
|
|
free(dname_stripped);
|
|
return;
|
|
}
|
|
|
|
/* dname_stripped is consumed or freed by the insert routine */
|
|
rpz_insert_local_zones_trigger(r->nsdname_zones, dname_stripped,
|
|
dnamelen_stripped, a, rrtype, rrclass, ttl, rdata, rdata_len,
|
|
rr, rr_len);
|
|
}
|
|
|
|
static int
|
|
rpz_insert_ipaddr_based_trigger(struct respip_set* set, struct sockaddr_storage* addr,
|
|
socklen_t addrlen, int net, enum rpz_action a, uint16_t rrtype,
|
|
uint16_t rrclass, uint32_t ttl, uint8_t* rdata, size_t rdata_len,
|
|
uint8_t* rr, size_t rr_len)
|
|
{
|
|
struct resp_addr* node;
|
|
char* rrstr;
|
|
enum respip_action respa = rpz_action_to_respip_action(a);
|
|
|
|
lock_rw_wrlock(&set->lock);
|
|
rrstr = sldns_wire2str_rr(rr, rr_len);
|
|
if(rrstr == NULL) {
|
|
log_err("malloc error while inserting rpz ipaddr based trigger");
|
|
lock_rw_unlock(&set->lock);
|
|
return 0;
|
|
}
|
|
|
|
node = respip_sockaddr_find_or_create(set, addr, addrlen, net, 1, rrstr);
|
|
if(node == NULL) {
|
|
lock_rw_unlock(&set->lock);
|
|
free(rrstr);
|
|
return 0;
|
|
}
|
|
|
|
lock_rw_wrlock(&node->lock);
|
|
lock_rw_unlock(&set->lock);
|
|
|
|
node->action = respa;
|
|
|
|
if(a == RPZ_LOCAL_DATA_ACTION) {
|
|
respip_enter_rr(set->region, node, rrtype,
|
|
rrclass, ttl, rdata, rdata_len, rrstr, "");
|
|
}
|
|
|
|
lock_rw_unlock(&node->lock);
|
|
free(rrstr);
|
|
return 1;
|
|
}
|
|
|
|
static inline struct clientip_synthesized_rr*
|
|
rpz_clientip_ensure_entry(struct clientip_synthesized_rrset* set,
|
|
struct sockaddr_storage* addr, socklen_t addrlen, int net)
|
|
{
|
|
int insert_ok;
|
|
struct clientip_synthesized_rr* node =
|
|
(struct clientip_synthesized_rr*)addr_tree_find(&set->entries,
|
|
addr, addrlen, net);
|
|
|
|
if(node != NULL) { return node; }
|
|
|
|
/* node does not yet exist => allocate one */
|
|
node = regional_alloc_zero(set->region, sizeof(*node));
|
|
if(node == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
|
|
lock_rw_init(&node->lock);
|
|
node->action = RPZ_INVALID_ACTION;
|
|
insert_ok = addr_tree_insert(&set->entries, &node->node,
|
|
addr, addrlen, net);
|
|
if (!insert_ok) {
|
|
log_warn("rpz: unexpected: unable to insert clientip address node");
|
|
/* we can not free the just allocated node.
|
|
* theoretically a memleak */
|
|
return NULL;
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
static void
|
|
rpz_report_rrset_error(const char* msg, uint8_t* rr, size_t rr_len) {
|
|
char* rrstr = sldns_wire2str_rr(rr, rr_len);
|
|
if(rrstr == NULL) {
|
|
log_err("malloc error while inserting rpz clientip based record");
|
|
return;
|
|
}
|
|
log_err("rpz: unexpected: unable to insert %s: %s", msg, rrstr);
|
|
free(rrstr);
|
|
}
|
|
|
|
/* from localzone.c; difference is we don't have a dname */
|
|
static struct local_rrset*
|
|
rpz_clientip_new_rrset(struct regional* region,
|
|
struct clientip_synthesized_rr* raddr, uint16_t rrtype, uint16_t rrclass)
|
|
{
|
|
struct packed_rrset_data* pd;
|
|
struct local_rrset* rrset = (struct local_rrset*)
|
|
regional_alloc_zero(region, sizeof(*rrset));
|
|
if(rrset == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
rrset->next = raddr->data;
|
|
raddr->data = rrset;
|
|
rrset->rrset = (struct ub_packed_rrset_key*)
|
|
regional_alloc_zero(region, sizeof(*rrset->rrset));
|
|
if(rrset->rrset == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
rrset->rrset->entry.key = rrset->rrset;
|
|
pd = (struct packed_rrset_data*)regional_alloc_zero(region, sizeof(*pd));
|
|
if(pd == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
pd->trust = rrset_trust_prim_noglue;
|
|
pd->security = sec_status_insecure;
|
|
rrset->rrset->entry.data = pd;
|
|
rrset->rrset->rk.type = htons(rrtype);
|
|
rrset->rrset->rk.rrset_class = htons(rrclass);
|
|
rrset->rrset->rk.dname = regional_alloc_zero(region, 1);
|
|
if(rrset->rrset->rk.dname == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
rrset->rrset->rk.dname_len = 1;
|
|
return rrset;
|
|
}
|
|
|
|
static int
|
|
rpz_clientip_enter_rr(struct regional* region, struct clientip_synthesized_rr* raddr,
|
|
uint16_t rrtype, uint16_t rrclass, time_t ttl, uint8_t* rdata,
|
|
size_t rdata_len)
|
|
{
|
|
struct local_rrset* rrset;
|
|
if (rrtype == LDNS_RR_TYPE_CNAME && raddr->data != NULL) {
|
|
log_err("CNAME response-ip data can not co-exist with other "
|
|
"client-ip data");
|
|
return 0;
|
|
}
|
|
|
|
rrset = rpz_clientip_new_rrset(region, raddr, rrtype, rrclass);
|
|
if(raddr->data == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
return rrset_insert_rr(region, rrset->rrset->entry.data, rdata, rdata_len, ttl, "");
|
|
}
|
|
|
|
static int
|
|
rpz_clientip_insert_trigger_rr(struct clientip_synthesized_rrset* set, struct sockaddr_storage* addr,
|
|
socklen_t addrlen, int net, enum rpz_action a, uint16_t rrtype,
|
|
uint16_t rrclass, uint32_t ttl, uint8_t* rdata, size_t rdata_len,
|
|
uint8_t* rr, size_t rr_len)
|
|
{
|
|
struct clientip_synthesized_rr* node;
|
|
|
|
lock_rw_wrlock(&set->lock);
|
|
|
|
node = rpz_clientip_ensure_entry(set, addr, addrlen, net);
|
|
if(node == NULL) {
|
|
lock_rw_unlock(&set->lock);
|
|
rpz_report_rrset_error("client ip address", rr, rr_len);
|
|
return 0;
|
|
}
|
|
|
|
lock_rw_wrlock(&node->lock);
|
|
lock_rw_unlock(&set->lock);
|
|
|
|
node->action = a;
|
|
if(a == RPZ_LOCAL_DATA_ACTION) {
|
|
if(!rpz_clientip_enter_rr(set->region, node, rrtype,
|
|
rrclass, ttl, rdata, rdata_len)) {
|
|
verbose(VERB_ALGO, "rpz: unable to insert clientip rr");
|
|
lock_rw_unlock(&node->lock);
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
|
|
lock_rw_unlock(&node->lock);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
rpz_insert_clientip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rrtype, uint16_t rrclass, uint32_t ttl,
|
|
uint8_t* rdata, size_t rdata_len, uint8_t* rr, size_t rr_len)
|
|
{
|
|
struct sockaddr_storage addr;
|
|
socklen_t addrlen;
|
|
int net, af;
|
|
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
return 0;
|
|
}
|
|
|
|
if(!netblockdnametoaddr(dname, dnamelen, &addr, &addrlen, &net, &af)) {
|
|
verbose(VERB_ALGO, "rpz: unable to parse client ip");
|
|
return 0;
|
|
}
|
|
|
|
return rpz_clientip_insert_trigger_rr(r->client_set, &addr, addrlen, net,
|
|
a, rrtype, rrclass, ttl, rdata, rdata_len, rr, rr_len);
|
|
}
|
|
|
|
static int
|
|
rpz_insert_nsip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rrtype, uint16_t rrclass, uint32_t ttl,
|
|
uint8_t* rdata, size_t rdata_len, uint8_t* rr, size_t rr_len)
|
|
{
|
|
struct sockaddr_storage addr;
|
|
socklen_t addrlen;
|
|
int net, af;
|
|
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
return 0;
|
|
}
|
|
|
|
if(!netblockdnametoaddr(dname, dnamelen, &addr, &addrlen, &net, &af)) {
|
|
verbose(VERB_ALGO, "rpz: unable to parse ns ip");
|
|
return 0;
|
|
}
|
|
|
|
return rpz_clientip_insert_trigger_rr(r->ns_set, &addr, addrlen, net,
|
|
a, rrtype, rrclass, ttl, rdata, rdata_len, rr, rr_len);
|
|
}
|
|
|
|
/** Insert RR into RPZ's respip_set */
|
|
static int
|
|
rpz_insert_response_ip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rrtype, uint16_t rrclass, uint32_t ttl,
|
|
uint8_t* rdata, size_t rdata_len, uint8_t* rr, size_t rr_len)
|
|
{
|
|
struct sockaddr_storage addr;
|
|
socklen_t addrlen;
|
|
int net, af;
|
|
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
return 0;
|
|
}
|
|
|
|
if(!netblockdnametoaddr(dname, dnamelen, &addr, &addrlen, &net, &af)) {
|
|
verbose(VERB_ALGO, "rpz: unable to parse response ip");
|
|
return 0;
|
|
}
|
|
|
|
if(a == RPZ_INVALID_ACTION ||
|
|
rpz_action_to_respip_action(a) == respip_invalid) {
|
|
char str[255+1];
|
|
dname_str(dname, str);
|
|
verbose(VERB_ALGO, "rpz: respip trigger, %s skipping unsupported action: %s",
|
|
str, rpz_action_to_string(a));
|
|
return 0;
|
|
}
|
|
|
|
return rpz_insert_ipaddr_based_trigger(r->respip_set, &addr, addrlen, net,
|
|
a, rrtype, rrclass, ttl, rdata, rdata_len, rr, rr_len);
|
|
}
|
|
|
|
int
|
|
rpz_insert_rr(struct rpz* r, uint8_t* azname, size_t aznamelen, uint8_t* dname,
|
|
size_t dnamelen, uint16_t rr_type, uint16_t rr_class, uint32_t rr_ttl,
|
|
uint8_t* rdatawl, size_t rdatalen, uint8_t* rr, size_t rr_len)
|
|
{
|
|
size_t policydnamelen;
|
|
/* name is free'd in local_zone delete */
|
|
enum rpz_trigger t;
|
|
enum rpz_action a;
|
|
uint8_t* policydname;
|
|
|
|
if(rpz_type_ignored(rr_type)) {
|
|
/* this rpz action is not valid, eg. this is the SOA or NS RR */
|
|
return 1;
|
|
}
|
|
if(!dname_subdomain_c(dname, azname)) {
|
|
char* dname_str = sldns_wire2str_dname(dname, dnamelen);
|
|
char* azname_str = sldns_wire2str_dname(azname, aznamelen);
|
|
if(dname_str && azname_str) {
|
|
log_err("rpz: name of record (%s) to insert into RPZ is not a "
|
|
"subdomain of the configured name of the RPZ zone (%s)",
|
|
dname_str, azname_str);
|
|
} else {
|
|
log_err("rpz: name of record to insert into RPZ is not a "
|
|
"subdomain of the configured name of the RPZ zone");
|
|
}
|
|
free(dname_str);
|
|
free(azname_str);
|
|
return 0;
|
|
}
|
|
|
|
log_assert(dnamelen >= aznamelen);
|
|
if(!(policydname = calloc(1, (dnamelen-aznamelen)+1))) {
|
|
log_err("malloc error while inserting RPZ RR");
|
|
return 0;
|
|
}
|
|
|
|
a = rpz_rr_to_action(rr_type, rdatawl, rdatalen);
|
|
if(!(policydnamelen = strip_dname_origin(dname, dnamelen, aznamelen,
|
|
policydname, (dnamelen-aznamelen)+1))) {
|
|
free(policydname);
|
|
return 0;
|
|
}
|
|
t = rpz_dname_to_trigger(policydname, policydnamelen);
|
|
if(t == RPZ_INVALID_TRIGGER) {
|
|
free(policydname);
|
|
verbose(VERB_ALGO, "rpz: skipping invalid trigger");
|
|
return 1;
|
|
}
|
|
if(t == RPZ_QNAME_TRIGGER) {
|
|
/* policydname will be consumed, no free */
|
|
rpz_insert_qname_trigger(r, policydname, policydnamelen,
|
|
a, rr_type, rr_class, rr_ttl, rdatawl, rdatalen, rr,
|
|
rr_len);
|
|
} else if(t == RPZ_RESPONSE_IP_TRIGGER) {
|
|
rpz_insert_response_ip_trigger(r, policydname, policydnamelen,
|
|
a, rr_type, rr_class, rr_ttl, rdatawl, rdatalen, rr,
|
|
rr_len);
|
|
free(policydname);
|
|
} else if(t == RPZ_CLIENT_IP_TRIGGER) {
|
|
rpz_insert_clientip_trigger(r, policydname, policydnamelen,
|
|
a, rr_type, rr_class, rr_ttl, rdatawl, rdatalen, rr,
|
|
rr_len);
|
|
free(policydname);
|
|
} else if(t == RPZ_NSIP_TRIGGER) {
|
|
rpz_insert_nsip_trigger(r, policydname, policydnamelen,
|
|
a, rr_type, rr_class, rr_ttl, rdatawl, rdatalen, rr,
|
|
rr_len);
|
|
free(policydname);
|
|
} else if(t == RPZ_NSDNAME_TRIGGER) {
|
|
rpz_insert_nsdname_trigger(r, policydname, policydnamelen,
|
|
a, rr_type, rr_class, rr_ttl, rdatawl, rdatalen, rr,
|
|
rr_len);
|
|
free(policydname);
|
|
} else {
|
|
free(policydname);
|
|
verbose(VERB_ALGO, "rpz: skipping unsupported trigger: %s",
|
|
rpz_trigger_to_string(t));
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Find RPZ local-zone by qname.
|
|
* @param zones: local-zone tree
|
|
* @param qname: qname
|
|
* @param qname_len: length of qname
|
|
* @param qclass: qclass
|
|
* @param only_exact: if 1 only exact (non wildcard) matches are returned
|
|
* @param wr: get write lock for local-zone if 1, read lock if 0
|
|
* @param zones_keep_lock: if set do not release the r->local_zones lock, this
|
|
* makes the caller of this function responsible for releasing the lock.
|
|
* @return: NULL or local-zone holding rd or wr lock
|
|
*/
|
|
static struct local_zone*
|
|
rpz_find_zone(struct local_zones* zones, uint8_t* qname, size_t qname_len, uint16_t qclass,
|
|
int only_exact, int wr, int zones_keep_lock)
|
|
{
|
|
uint8_t* ce;
|
|
size_t ce_len;
|
|
int ce_labs;
|
|
uint8_t wc[LDNS_MAX_DOMAINLEN+1];
|
|
int exact;
|
|
struct local_zone* z = NULL;
|
|
|
|
if(wr) {
|
|
lock_rw_wrlock(&zones->lock);
|
|
} else {
|
|
lock_rw_rdlock(&zones->lock);
|
|
}
|
|
z = local_zones_find_le(zones, qname, qname_len,
|
|
dname_count_labels(qname),
|
|
LDNS_RR_CLASS_IN, &exact);
|
|
if(!z || (only_exact && !exact)) {
|
|
if(!zones_keep_lock) {
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
return NULL;
|
|
}
|
|
if(wr) {
|
|
lock_rw_wrlock(&z->lock);
|
|
} else {
|
|
lock_rw_rdlock(&z->lock);
|
|
}
|
|
if(!zones_keep_lock) {
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
|
|
if(exact)
|
|
return z;
|
|
|
|
/* No exact match found, lookup wildcard. closest encloser must
|
|
* be the shared parent between the qname and the best local
|
|
* zone match, append '*' to that and do another lookup. */
|
|
|
|
ce = dname_get_shared_topdomain(z->name, qname);
|
|
if(!ce /* should not happen */) {
|
|
lock_rw_unlock(&z->lock);
|
|
if(zones_keep_lock) {
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
return NULL;
|
|
}
|
|
ce_labs = dname_count_size_labels(ce, &ce_len);
|
|
if(ce_len+2 > sizeof(wc)) {
|
|
lock_rw_unlock(&z->lock);
|
|
if(zones_keep_lock) {
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
return NULL;
|
|
}
|
|
wc[0] = 1; /* length of wildcard label */
|
|
wc[1] = (uint8_t)'*'; /* wildcard label */
|
|
memmove(wc+2, ce, ce_len);
|
|
lock_rw_unlock(&z->lock);
|
|
|
|
if(!zones_keep_lock) {
|
|
if(wr) {
|
|
lock_rw_wrlock(&zones->lock);
|
|
} else {
|
|
lock_rw_rdlock(&zones->lock);
|
|
}
|
|
}
|
|
z = local_zones_find_le(zones, wc,
|
|
ce_len+2, ce_labs+1, qclass, &exact);
|
|
if(!z || !exact) {
|
|
lock_rw_unlock(&zones->lock);
|
|
return NULL;
|
|
}
|
|
if(wr) {
|
|
lock_rw_wrlock(&z->lock);
|
|
} else {
|
|
lock_rw_rdlock(&z->lock);
|
|
}
|
|
if(!zones_keep_lock) {
|
|
lock_rw_unlock(&zones->lock);
|
|
}
|
|
return z;
|
|
}
|
|
|
|
/**
|
|
* Remove RR from RPZ's local-data
|
|
* @param z: local-zone for RPZ, holding write lock
|
|
* @param policydname: dname of RR to remove
|
|
* @param policydnamelen: length of policydname
|
|
* @param rr_type: RR type of RR to remove
|
|
* @param rdata: rdata of RR to remove
|
|
* @param rdatalen: length of rdata
|
|
* @return: 1 if zone must be removed after RR deletion
|
|
*/
|
|
static int
|
|
rpz_data_delete_rr(struct local_zone* z, uint8_t* policydname,
|
|
size_t policydnamelen, uint16_t rr_type, uint8_t* rdata,
|
|
size_t rdatalen)
|
|
{
|
|
struct local_data* ld;
|
|
struct packed_rrset_data* d;
|
|
size_t index;
|
|
ld = local_zone_find_data(z, policydname, policydnamelen,
|
|
dname_count_labels(policydname));
|
|
if(ld) {
|
|
struct local_rrset* prev=NULL, *p=ld->rrsets;
|
|
while(p && ntohs(p->rrset->rk.type) != rr_type) {
|
|
prev = p;
|
|
p = p->next;
|
|
}
|
|
if(!p)
|
|
return 0;
|
|
d = (struct packed_rrset_data*)p->rrset->entry.data;
|
|
if(packed_rrset_find_rr(d, rdata, rdatalen, &index)) {
|
|
if(d->count == 1) {
|
|
/* no memory recycling for zone deletions ... */
|
|
if(prev) prev->next = p->next;
|
|
else ld->rrsets = p->next;
|
|
}
|
|
if(d->count > 1) {
|
|
if(!local_rrset_remove_rr(d, index))
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
if(ld && ld->rrsets)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Remove RR from RPZ's respip set
|
|
* @param raddr: respip node
|
|
* @param rr_type: RR type of RR to remove
|
|
* @param rdata: rdata of RR to remove
|
|
* @param rdatalen: length of rdata
|
|
* @return: 1 if zone must be removed after RR deletion
|
|
*/
|
|
static int
|
|
rpz_rrset_delete_rr(struct resp_addr* raddr, uint16_t rr_type, uint8_t* rdata,
|
|
size_t rdatalen)
|
|
{
|
|
size_t index;
|
|
struct packed_rrset_data* d;
|
|
if(!raddr->data)
|
|
return 1;
|
|
d = raddr->data->entry.data;
|
|
if(ntohs(raddr->data->rk.type) != rr_type) {
|
|
return 0;
|
|
}
|
|
if(packed_rrset_find_rr(d, rdata, rdatalen, &index)) {
|
|
if(d->count == 1) {
|
|
/* regional alloc'd */
|
|
raddr->data->entry.data = NULL;
|
|
raddr->data = NULL;
|
|
return 1;
|
|
}
|
|
if(d->count > 1) {
|
|
if(!local_rrset_remove_rr(d, index))
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|
|
/** Remove RR from RPZ's local-zone */
|
|
static void
|
|
rpz_remove_qname_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rr_type, uint16_t rr_class,
|
|
uint8_t* rdatawl, size_t rdatalen)
|
|
{
|
|
struct local_zone* z;
|
|
int delete_zone = 1;
|
|
z = rpz_find_zone(r->local_zones, dname, dnamelen, rr_class,
|
|
1 /* only exact */, 1 /* wr lock */, 1 /* keep lock*/);
|
|
if(!z) {
|
|
verbose(VERB_ALGO, "rpz: cannot remove RR from IXFR, "
|
|
"RPZ domain not found");
|
|
return;
|
|
}
|
|
if(a == RPZ_LOCAL_DATA_ACTION)
|
|
delete_zone = rpz_data_delete_rr(z, dname,
|
|
dnamelen, rr_type, rdatawl, rdatalen);
|
|
else if(a != localzone_type_to_rpz_action(z->type)) {
|
|
lock_rw_unlock(&z->lock);
|
|
lock_rw_unlock(&r->local_zones->lock);
|
|
return;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
if(delete_zone) {
|
|
local_zones_del_zone(r->local_zones, z);
|
|
}
|
|
lock_rw_unlock(&r->local_zones->lock);
|
|
return;
|
|
}
|
|
|
|
static void
|
|
rpz_remove_response_ip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,
|
|
enum rpz_action a, uint16_t rr_type, uint8_t* rdatawl, size_t rdatalen)
|
|
{
|
|
struct resp_addr* node;
|
|
struct sockaddr_storage addr;
|
|
socklen_t addrlen;
|
|
int net, af;
|
|
int delete_respip = 1;
|
|
|
|
if(!netblockdnametoaddr(dname, dnamelen, &addr, &addrlen, &net, &af))
|
|
return;
|
|
|
|
lock_rw_wrlock(&r->respip_set->lock);
|
|
if(!(node = (struct resp_addr*)addr_tree_find(
|
|
&r->respip_set->ip_tree, &addr, addrlen, net))) {
|
|
verbose(VERB_ALGO, "rpz: cannot remove RR from IXFR, "
|
|
"RPZ domain not found");
|
|
lock_rw_unlock(&r->respip_set->lock);
|
|
return;
|
|
}
|
|
|
|
lock_rw_wrlock(&node->lock);
|
|
if(a == RPZ_LOCAL_DATA_ACTION) {
|
|
/* remove RR, signal whether RR can be removed */
|
|
delete_respip = rpz_rrset_delete_rr(node, rr_type, rdatawl,
|
|
rdatalen);
|
|
}
|
|
lock_rw_unlock(&node->lock);
|
|
if(delete_respip)
|
|
respip_sockaddr_delete(r->respip_set, node);
|
|
lock_rw_unlock(&r->respip_set->lock);
|
|
}
|
|
|
|
void
|
|
rpz_remove_rr(struct rpz* r, size_t aznamelen, uint8_t* dname, size_t dnamelen,
|
|
uint16_t rr_type, uint16_t rr_class, uint8_t* rdatawl, size_t rdatalen)
|
|
{
|
|
size_t policydnamelen;
|
|
enum rpz_trigger t;
|
|
enum rpz_action a;
|
|
uint8_t* policydname;
|
|
|
|
if(!(policydname = calloc(1, LDNS_MAX_DOMAINLEN + 1)))
|
|
return;
|
|
|
|
a = rpz_rr_to_action(rr_type, rdatawl, rdatalen);
|
|
if(a == RPZ_INVALID_ACTION) {
|
|
free(policydname);
|
|
return;
|
|
}
|
|
if(!(policydnamelen = strip_dname_origin(dname, dnamelen, aznamelen,
|
|
policydname, LDNS_MAX_DOMAINLEN + 1))) {
|
|
free(policydname);
|
|
return;
|
|
}
|
|
t = rpz_dname_to_trigger(policydname, policydnamelen);
|
|
if(t == RPZ_QNAME_TRIGGER) {
|
|
rpz_remove_qname_trigger(r, policydname, policydnamelen, a,
|
|
rr_type, rr_class, rdatawl, rdatalen);
|
|
} else if(t == RPZ_RESPONSE_IP_TRIGGER) {
|
|
rpz_remove_response_ip_trigger(r, policydname, policydnamelen,
|
|
a, rr_type, rdatawl, rdatalen);
|
|
}
|
|
free(policydname);
|
|
}
|
|
|
|
/** print log information for an applied RPZ policy. Based on local-zone's
|
|
* lz_inform_print().
|
|
* The repinfo contains the reply address. If it is NULL, the module
|
|
* state is used to report the first IP address (if any).
|
|
* The dname is used, for the applied rpz, if NULL, addrnode is used.
|
|
*/
|
|
static void
|
|
log_rpz_apply(char* trigger, uint8_t* dname, struct addr_tree_node* addrnode,
|
|
enum rpz_action a, struct query_info* qinfo,
|
|
struct comm_reply* repinfo, struct module_qstate* ms, char* log_name)
|
|
{
|
|
char ip[128], txt[512], portstr[32];
|
|
char dnamestr[LDNS_MAX_DOMAINLEN+1];
|
|
uint16_t port = 0;
|
|
if(dname) {
|
|
dname_str(dname, dnamestr);
|
|
} else if(addrnode) {
|
|
char addrbuf[128];
|
|
addr_to_str(&addrnode->addr, addrnode->addrlen, addrbuf, sizeof(addrbuf));
|
|
snprintf(dnamestr, sizeof(dnamestr), "%s/%d", addrbuf, addrnode->net);
|
|
} else {
|
|
dnamestr[0]=0;
|
|
}
|
|
if(repinfo) {
|
|
addr_to_str(&repinfo->client_addr, repinfo->client_addrlen, ip, sizeof(ip));
|
|
port = ntohs(((struct sockaddr_in*)&repinfo->client_addr)->sin_port);
|
|
} else if(ms && ms->mesh_info && ms->mesh_info->reply_list) {
|
|
addr_to_str(&ms->mesh_info->reply_list->query_reply.client_addr,
|
|
ms->mesh_info->reply_list->query_reply.client_addrlen,
|
|
ip, sizeof(ip));
|
|
port = ntohs(((struct sockaddr_in*)&ms->mesh_info->reply_list->query_reply.client_addr)->sin_port);
|
|
} else {
|
|
ip[0]=0;
|
|
port = 0;
|
|
}
|
|
snprintf(portstr, sizeof(portstr), "@%u", (unsigned)port);
|
|
snprintf(txt, sizeof(txt), "rpz: applied %s%s%s%s%s%s %s %s%s",
|
|
(log_name?"[":""), (log_name?log_name:""), (log_name?"] ":""),
|
|
(strcmp(trigger,"qname")==0?"":trigger),
|
|
(strcmp(trigger,"qname")==0?"":" "),
|
|
dnamestr, rpz_action_to_string(a),
|
|
(ip[0]?ip:""), (ip[0]?portstr:""));
|
|
log_nametypeclass(0, txt, qinfo->qname, qinfo->qtype, qinfo->qclass);
|
|
}
|
|
|
|
static struct clientip_synthesized_rr*
|
|
rpz_ipbased_trigger_lookup(struct clientip_synthesized_rrset* set,
|
|
struct sockaddr_storage* addr, socklen_t addrlen, char* triggername)
|
|
{
|
|
struct clientip_synthesized_rr* raddr = NULL;
|
|
enum rpz_action action = RPZ_INVALID_ACTION;
|
|
|
|
lock_rw_rdlock(&set->lock);
|
|
|
|
raddr = (struct clientip_synthesized_rr*)addr_tree_lookup(&set->entries,
|
|
addr, addrlen);
|
|
if(raddr != NULL) {
|
|
lock_rw_rdlock(&raddr->lock);
|
|
action = raddr->action;
|
|
if(verbosity >= VERB_ALGO) {
|
|
char ip[256], net[256];
|
|
addr_to_str(addr, addrlen, ip, sizeof(ip));
|
|
addr_to_str(&raddr->node.addr, raddr->node.addrlen,
|
|
net, sizeof(net));
|
|
verbose(VERB_ALGO, "rpz: trigger %s %s/%d on %s action=%s",
|
|
triggername, net, raddr->node.net, ip, rpz_action_to_string(action));
|
|
}
|
|
}
|
|
lock_rw_unlock(&set->lock);
|
|
|
|
return raddr;
|
|
}
|
|
|
|
static inline
|
|
struct clientip_synthesized_rr*
|
|
rpz_resolve_client_action_and_zone(struct auth_zones* az, struct query_info* qinfo,
|
|
struct comm_reply* repinfo, uint8_t* taglist, size_t taglen,
|
|
struct ub_server_stats* stats,
|
|
/* output parameters */
|
|
struct local_zone** z_out, struct auth_zone** a_out, struct rpz** r_out)
|
|
{
|
|
struct clientip_synthesized_rr* node = NULL;
|
|
struct auth_zone* a = NULL;
|
|
struct rpz* r = NULL;
|
|
struct local_zone* z = NULL;
|
|
|
|
lock_rw_rdlock(&az->rpz_lock);
|
|
|
|
for(a = az->rpz_first; a; a = a->rpz_az_next) {
|
|
lock_rw_rdlock(&a->lock);
|
|
r = a->rpz;
|
|
if(r->disabled) {
|
|
lock_rw_unlock(&a->lock);
|
|
continue;
|
|
}
|
|
if(r->taglist && !taglist_intersect(r->taglist,
|
|
r->taglistlen, taglist, taglen)) {
|
|
lock_rw_unlock(&a->lock);
|
|
continue;
|
|
}
|
|
z = rpz_find_zone(r->local_zones, qinfo->qname, qinfo->qname_len,
|
|
qinfo->qclass, 0, 0, 0);
|
|
node = rpz_ipbased_trigger_lookup(r->client_set,
|
|
&repinfo->client_addr, repinfo->client_addrlen,
|
|
"clientip");
|
|
if((z || node) && r->action_override == RPZ_DISABLED_ACTION) {
|
|
if(r->log)
|
|
log_rpz_apply((node?"clientip":"qname"),
|
|
(z?z->name:NULL),
|
|
(node?&node->node:NULL),
|
|
r->action_override,
|
|
qinfo, repinfo, NULL, r->log_name);
|
|
stats->rpz_action[r->action_override]++;
|
|
if(z != NULL) {
|
|
lock_rw_unlock(&z->lock);
|
|
z = NULL;
|
|
}
|
|
if(node != NULL) {
|
|
lock_rw_unlock(&node->lock);
|
|
node = NULL;
|
|
}
|
|
}
|
|
if(z || node) {
|
|
break;
|
|
}
|
|
/* not found in this auth_zone */
|
|
lock_rw_unlock(&a->lock);
|
|
}
|
|
|
|
lock_rw_unlock(&az->rpz_lock);
|
|
|
|
*r_out = r;
|
|
*a_out = a;
|
|
*z_out = z;
|
|
|
|
return node;
|
|
}
|
|
|
|
static inline int
|
|
rpz_is_udp_query(struct comm_reply* repinfo) {
|
|
return repinfo != NULL
|
|
? (repinfo->c != NULL
|
|
? repinfo->c->type == comm_udp
|
|
: 0)
|
|
: 0;
|
|
}
|
|
|
|
/** encode answer consisting of 1 rrset */
|
|
static int
|
|
rpz_local_encode(struct module_env* env, struct query_info* qinfo,
|
|
struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
|
|
struct regional* temp, struct ub_packed_rrset_key* rrset, int ansec,
|
|
int rcode, struct ub_packed_rrset_key* soa_rrset)
|
|
{
|
|
struct reply_info rep;
|
|
uint16_t udpsize;
|
|
struct ub_packed_rrset_key* rrsetlist[3];
|
|
|
|
memset(&rep, 0, sizeof(rep));
|
|
rep.flags = (uint16_t)((BIT_QR | BIT_AA | BIT_RA) | rcode);
|
|
rep.qdcount = 1;
|
|
rep.rrset_count = ansec;
|
|
rep.rrsets = rrsetlist;
|
|
if(ansec > 0) {
|
|
rep.an_numrrsets = 1;
|
|
rep.rrsets[0] = rrset;
|
|
rep.ttl = ((struct packed_rrset_data*)rrset->entry.data)->rr_ttl[0];
|
|
}
|
|
if(soa_rrset != NULL) {
|
|
rep.ar_numrrsets = 1;
|
|
rep.rrsets[rep.rrset_count] = soa_rrset;
|
|
rep.rrset_count ++;
|
|
if(rep.ttl < ((struct packed_rrset_data*)soa_rrset->entry.data)->rr_ttl[0]) {
|
|
rep.ttl = ((struct packed_rrset_data*)soa_rrset->entry.data)->rr_ttl[0];
|
|
}
|
|
}
|
|
|
|
udpsize = edns->udp_size;
|
|
edns->edns_version = EDNS_ADVERTISED_VERSION;
|
|
edns->udp_size = EDNS_ADVERTISED_SIZE;
|
|
edns->ext_rcode = 0;
|
|
edns->bits &= EDNS_DO;
|
|
if(!inplace_cb_reply_local_call(env, qinfo, NULL, &rep, rcode, edns,
|
|
repinfo, temp, env->now_tv) ||
|
|
!reply_info_answer_encode(qinfo, &rep,
|
|
*(uint16_t*)sldns_buffer_begin(buf), sldns_buffer_read_u16_at(buf, 2),
|
|
buf, 0, 0, temp, udpsize, edns, (int)(edns->bits&EDNS_DO), 0)) {
|
|
error_encode(buf, (LDNS_RCODE_SERVFAIL|BIT_AA), qinfo,
|
|
*(uint16_t*)sldns_buffer_begin(buf),
|
|
sldns_buffer_read_u16_at(buf, 2), edns);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static struct local_rrset*
|
|
rpz_find_synthesized_rrset(uint16_t qtype,
|
|
struct clientip_synthesized_rr* data)
|
|
{
|
|
struct local_rrset* cursor = data->data;
|
|
while( cursor != NULL) {
|
|
struct packed_rrset_key* packed_rrset = &cursor->rrset->rk;
|
|
if(htons(qtype) == packed_rrset->type) {
|
|
return cursor;
|
|
}
|
|
cursor = cursor->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/** allocate SOA record ubrrsetkey in region */
|
|
static struct ub_packed_rrset_key*
|
|
make_soa_ubrrset(struct auth_zone* auth_zone, struct auth_rrset* soa,
|
|
struct regional* temp)
|
|
{
|
|
struct ub_packed_rrset_key csoa;
|
|
if(!soa)
|
|
return NULL;
|
|
memset(&csoa, 0, sizeof(csoa));
|
|
csoa.entry.key = &csoa;
|
|
csoa.rk.rrset_class = htons(LDNS_RR_CLASS_IN);
|
|
csoa.rk.type = htons(LDNS_RR_TYPE_SOA);
|
|
csoa.rk.flags |= PACKED_RRSET_FIXEDTTL
|
|
| PACKED_RRSET_RPZ;
|
|
csoa.rk.dname = auth_zone->name;
|
|
csoa.rk.dname_len = auth_zone->namelen;
|
|
csoa.entry.hash = rrset_key_hash(&csoa.rk);
|
|
csoa.entry.data = soa->data;
|
|
return respip_copy_rrset(&csoa, temp);
|
|
}
|
|
|
|
static void
|
|
rpz_apply_clientip_localdata_action(struct clientip_synthesized_rr* raddr,
|
|
struct module_env* env, struct query_info* qinfo,
|
|
struct edns_data* edns, struct comm_reply* repinfo, sldns_buffer* buf,
|
|
struct regional* temp, struct auth_zone* auth_zone)
|
|
{
|
|
struct local_rrset* rrset;
|
|
enum rpz_action action = RPZ_INVALID_ACTION;
|
|
struct ub_packed_rrset_key* rp = NULL;
|
|
struct ub_packed_rrset_key* rsoa = NULL;
|
|
int rcode = LDNS_RCODE_NOERROR|BIT_AA;
|
|
int rrset_count = 1;
|
|
|
|
/* prepare synthesized answer for client */
|
|
action = raddr->action;
|
|
if(action == RPZ_LOCAL_DATA_ACTION && raddr->data == NULL ) {
|
|
verbose(VERB_ALGO, "rpz: bug: local-data action but no local data");
|
|
return;
|
|
}
|
|
|
|
/* check query type / rr type */
|
|
rrset = rpz_find_synthesized_rrset(qinfo->qtype, raddr);
|
|
if(rrset == NULL) {
|
|
verbose(VERB_ALGO, "rpz: unable to find local-data for query");
|
|
rrset_count = 0;
|
|
goto nodata;
|
|
}
|
|
|
|
rp = respip_copy_rrset(rrset->rrset, temp);
|
|
if(!rp) {
|
|
verbose(VERB_ALGO, "rpz: local data action: out of memory");
|
|
return;
|
|
}
|
|
|
|
rp->rk.flags |= PACKED_RRSET_FIXEDTTL | PACKED_RRSET_RPZ;
|
|
rp->rk.dname = qinfo->qname;
|
|
rp->rk.dname_len = qinfo->qname_len;
|
|
rp->entry.hash = rrset_key_hash(&rp->rk);
|
|
nodata:
|
|
if(auth_zone) {
|
|
struct auth_rrset* soa = NULL;
|
|
soa = auth_zone_get_soa_rrset(auth_zone);
|
|
if(soa) {
|
|
rsoa = make_soa_ubrrset(auth_zone, soa, temp);
|
|
if(!rsoa) {
|
|
verbose(VERB_ALGO, "rpz: local data action soa: out of memory");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
rpz_local_encode(env, qinfo, edns, repinfo, buf, temp, rp,
|
|
rrset_count, rcode, rsoa);
|
|
}
|
|
|
|
/** add additional section SOA record to the reply.
|
|
* Since this gets fed into the normal iterator answer creation, it
|
|
* gets minimal-responses applied to it, that can remove the additional SOA
|
|
* again. */
|
|
static int
|
|
rpz_add_soa(struct reply_info* rep, struct module_qstate* ms,
|
|
struct auth_zone* az)
|
|
{
|
|
struct auth_rrset* soa = NULL;
|
|
struct ub_packed_rrset_key* rsoa = NULL;
|
|
struct ub_packed_rrset_key** prevrrsets;
|
|
if(!az) return 1;
|
|
soa = auth_zone_get_soa_rrset(az);
|
|
if(!soa) return 1;
|
|
if(!rep) return 0;
|
|
rsoa = make_soa_ubrrset(az, soa, ms->region);
|
|
if(!rsoa) return 0;
|
|
prevrrsets = rep->rrsets;
|
|
rep->rrsets = regional_alloc_zero(ms->region,
|
|
sizeof(*rep->rrsets)*(rep->rrset_count+1));
|
|
if(!rep->rrsets)
|
|
return 0;
|
|
if(prevrrsets && rep->rrset_count > 0)
|
|
memcpy(rep->rrsets, prevrrsets, rep->rrset_count*sizeof(*rep->rrsets));
|
|
rep->rrset_count++;
|
|
rep->ar_numrrsets++;
|
|
rep->rrsets[rep->rrset_count-1] = rsoa;
|
|
return 1;
|
|
}
|
|
|
|
static inline struct dns_msg*
|
|
rpz_dns_msg_new(struct regional* region)
|
|
{
|
|
struct dns_msg* msg =
|
|
(struct dns_msg*)regional_alloc(region,
|
|
sizeof(struct dns_msg));
|
|
if(msg == NULL) { return NULL; }
|
|
memset(msg, 0, sizeof(struct dns_msg));
|
|
|
|
return msg;
|
|
}
|
|
|
|
static inline struct dns_msg*
|
|
rpz_synthesize_nodata(struct rpz* ATTR_UNUSED(r), struct module_qstate* ms,
|
|
struct query_info* qinfo, struct auth_zone* az)
|
|
{
|
|
struct dns_msg* msg = rpz_dns_msg_new(ms->region);
|
|
if(msg == NULL) { return msg; }
|
|
msg->qinfo = *qinfo;
|
|
msg->rep = construct_reply_info_base(ms->region,
|
|
LDNS_RCODE_NOERROR | BIT_QR | BIT_AA | BIT_RA,
|
|
1, /* qd */
|
|
0, /* ttl */
|
|
0, /* prettl */
|
|
0, /* expttl */
|
|
0, /* an */
|
|
0, /* ns */
|
|
0, /* ar */
|
|
0, /* total */
|
|
sec_status_insecure);
|
|
if(msg->rep)
|
|
msg->rep->authoritative = 1;
|
|
if(!rpz_add_soa(msg->rep, ms, az))
|
|
return NULL;
|
|
return msg;
|
|
}
|
|
|
|
static inline struct dns_msg*
|
|
rpz_synthesize_nxdomain(struct rpz* r, struct module_qstate* ms,
|
|
struct query_info* qinfo, struct auth_zone* az)
|
|
{
|
|
struct dns_msg* msg = rpz_dns_msg_new(ms->region);
|
|
uint16_t flags;
|
|
if(msg == NULL) { return msg; }
|
|
msg->qinfo = *qinfo;
|
|
flags = LDNS_RCODE_NXDOMAIN | BIT_QR | BIT_AA | BIT_RA;
|
|
if(r->signal_nxdomain_ra)
|
|
flags &= ~BIT_RA;
|
|
msg->rep = construct_reply_info_base(ms->region,
|
|
flags,
|
|
1, /* qd */
|
|
0, /* ttl */
|
|
0, /* prettl */
|
|
0, /* expttl */
|
|
0, /* an */
|
|
0, /* ns */
|
|
0, /* ar */
|
|
0, /* total */
|
|
sec_status_insecure);
|
|
if(msg->rep)
|
|
msg->rep->authoritative = 1;
|
|
if(!rpz_add_soa(msg->rep, ms, az))
|
|
return NULL;
|
|
return msg;
|
|
}
|
|
|
|
static inline struct dns_msg*
|
|
rpz_synthesize_localdata_from_rrset(struct rpz* ATTR_UNUSED(r), struct module_qstate* ms,
|
|
struct query_info* qi, struct local_rrset* rrset, struct auth_zone* az)
|
|
{
|
|
struct dns_msg* msg = NULL;
|
|
struct reply_info* new_reply_info;
|
|
struct ub_packed_rrset_key* rp;
|
|
|
|
|
|
msg = rpz_dns_msg_new(ms->region);
|
|
if(msg == NULL) { return NULL; }
|
|
|
|
new_reply_info = construct_reply_info_base(ms->region,
|
|
LDNS_RCODE_NOERROR | BIT_QR | BIT_AA | BIT_RA,
|
|
1, /* qd */
|
|
0, /* ttl */
|
|
0, /* prettl */
|
|
0, /* expttl */
|
|
1, /* an */
|
|
0, /* ns */
|
|
0, /* ar */
|
|
1, /* total */
|
|
sec_status_insecure);
|
|
if(new_reply_info == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
new_reply_info->authoritative = 1;
|
|
rp = respip_copy_rrset(rrset->rrset, ms->region);
|
|
if(rp == NULL) {
|
|
log_err("out of memory");
|
|
return NULL;
|
|
}
|
|
rp->rk.dname = qi->qname;
|
|
rp->rk.dname_len = qi->qname_len;
|
|
/* this rrset is from the rpz data, or synthesized.
|
|
* It is not actually from the network, so we flag it with this
|
|
* flags as a fake RRset. If later the cache is used to look up
|
|
* rrsets, then the fake ones are not returned (if you look without
|
|
* the flag). For like CNAME lookups from the iterator or A, AAAA
|
|
* lookups for nameserver targets, it would use the without flag
|
|
* actual data. So that the actual network data and fake data
|
|
* are kept track of separately. */
|
|
rp->rk.flags |= PACKED_RRSET_RPZ;
|
|
new_reply_info->rrsets[0] = rp;
|
|
msg->rep = new_reply_info;
|
|
if(!rpz_add_soa(msg->rep, ms, az))
|
|
return NULL;
|
|
return msg;
|
|
}
|
|
|
|
static inline struct dns_msg*
|
|
rpz_synthesize_nsip_localdata(struct rpz* r, struct module_qstate* ms,
|
|
struct clientip_synthesized_rr* data, struct auth_zone* az)
|
|
{
|
|
struct query_info* qi = &ms->qinfo;
|
|
struct local_rrset* rrset;
|
|
|
|
rrset = rpz_find_synthesized_rrset(qi->qtype, data);
|
|
if(rrset == NULL) {
|
|
verbose(VERB_ALGO, "rpz: nsip: no matching local data found");
|
|
return NULL;
|
|
}
|
|
|
|
return rpz_synthesize_localdata_from_rrset(r, ms, &ms->qinfo, rrset, az);
|
|
}
|
|
|
|
/* copy'n'paste from localzone.c */
|
|
static struct local_rrset*
|
|
local_data_find_type(struct local_data* data, uint16_t type, int alias_ok)
|
|
{
|
|
struct local_rrset* p;
|
|
type = htons(type);
|
|
for(p = data->rrsets; p; p = p->next) {
|
|
if(p->rrset->rk.type == type)
|
|
return p;
|
|
if(alias_ok && p->rrset->rk.type == htons(LDNS_RR_TYPE_CNAME))
|
|
return p;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* based on localzone.c:local_data_answer() */
|
|
static inline struct dns_msg*
|
|
rpz_synthesize_nsdname_localdata(struct rpz* r, struct module_qstate* ms,
|
|
struct local_zone* z, struct matched_delegation_point const* match,
|
|
struct auth_zone* az)
|
|
{
|
|
struct local_data key;
|
|
struct local_data* ld;
|
|
struct local_rrset* rrset;
|
|
|
|
if(match->dname == NULL) { return NULL; }
|
|
|
|
key.node.key = &key;
|
|
key.name = match->dname;
|
|
key.namelen = match->dname_len;
|
|
key.namelabs = dname_count_labels(match->dname);
|
|
|
|
rpz_log_dname("nsdname local data", key.name, key.namelen);
|
|
|
|
ld = (struct local_data*)rbtree_search(&z->data, &key.node);
|
|
if(ld == NULL) {
|
|
verbose(VERB_ALGO, "rpz: nsdname: impossible: qname not found");
|
|
return NULL;
|
|
}
|
|
|
|
rrset = local_data_find_type(ld, ms->qinfo.qtype, 1);
|
|
if(rrset == NULL) {
|
|
verbose(VERB_ALGO, "rpz: nsdname: no matching local data found");
|
|
return NULL;
|
|
}
|
|
|
|
return rpz_synthesize_localdata_from_rrset(r, ms, &ms->qinfo, rrset, az);
|
|
}
|
|
|
|
/* like local_data_answer for qname triggers after a cname */
|
|
static struct dns_msg*
|
|
rpz_synthesize_qname_localdata_msg(struct rpz* r, struct module_qstate* ms,
|
|
struct query_info* qinfo, struct local_zone* z, struct auth_zone* az)
|
|
{
|
|
struct local_data key;
|
|
struct local_data* ld;
|
|
struct local_rrset* rrset;
|
|
key.node.key = &key;
|
|
key.name = qinfo->qname;
|
|
key.namelen = qinfo->qname_len;
|
|
key.namelabs = dname_count_labels(qinfo->qname);
|
|
ld = (struct local_data*)rbtree_search(&z->data, &key.node);
|
|
if(ld == NULL) {
|
|
verbose(VERB_ALGO, "rpz: qname after cname: name not found");
|
|
return NULL;
|
|
}
|
|
rrset = local_data_find_type(ld, qinfo->qtype, 1);
|
|
if(rrset == NULL) {
|
|
verbose(VERB_ALGO, "rpz: qname after cname: type not found");
|
|
return NULL;
|
|
}
|
|
return rpz_synthesize_localdata_from_rrset(r, ms, qinfo, rrset, az);
|
|
}
|
|
|
|
static int
|
|
rpz_synthesize_qname_localdata(struct module_env* env, struct rpz* r,
|
|
struct local_zone* z, enum localzone_type lzt, struct query_info* qinfo,
|
|
struct edns_data* edns, sldns_buffer* buf, struct regional* temp,
|
|
struct comm_reply* repinfo, struct ub_server_stats* stats)
|
|
{
|
|
struct local_data* ld = NULL;
|
|
int ret = 0;
|
|
if(r->action_override == RPZ_CNAME_OVERRIDE_ACTION) {
|
|
qinfo->local_alias = regional_alloc_zero(temp, sizeof(struct local_rrset));
|
|
if(qinfo->local_alias == NULL) {
|
|
return 0; /* out of memory */
|
|
}
|
|
qinfo->local_alias->rrset = regional_alloc_init(temp, r->cname_override,
|
|
sizeof(*r->cname_override));
|
|
if(qinfo->local_alias->rrset == NULL) {
|
|
return 0; /* out of memory */
|
|
}
|
|
qinfo->local_alias->rrset->rk.dname = qinfo->qname;
|
|
qinfo->local_alias->rrset->rk.dname_len = qinfo->qname_len;
|
|
if(r->log) {
|
|
log_rpz_apply("qname", z->name, NULL, RPZ_CNAME_OVERRIDE_ACTION,
|
|
qinfo, repinfo, NULL, r->log_name);
|
|
}
|
|
stats->rpz_action[RPZ_CNAME_OVERRIDE_ACTION]++;
|
|
return 0;
|
|
}
|
|
|
|
if(lzt == local_zone_redirect && local_data_answer(z, env, qinfo,
|
|
edns, repinfo, buf, temp, dname_count_labels(qinfo->qname),
|
|
&ld, lzt, -1, NULL, 0, NULL, 0)) {
|
|
if(r->log) {
|
|
log_rpz_apply("qname", z->name, NULL,
|
|
localzone_type_to_rpz_action(lzt), qinfo,
|
|
repinfo, NULL, r->log_name);
|
|
}
|
|
stats->rpz_action[localzone_type_to_rpz_action(lzt)]++;
|
|
return !qinfo->local_alias;
|
|
}
|
|
|
|
ret = local_zones_zone_answer(z, env, qinfo, edns, repinfo, buf, temp,
|
|
0 /* no local data used */, lzt);
|
|
if(r->signal_nxdomain_ra && LDNS_RCODE_WIRE(sldns_buffer_begin(buf))
|
|
== LDNS_RCODE_NXDOMAIN)
|
|
LDNS_RA_CLR(sldns_buffer_begin(buf));
|
|
if(r->log) {
|
|
log_rpz_apply("qname", z->name, NULL, localzone_type_to_rpz_action(lzt),
|
|
qinfo, repinfo, NULL, r->log_name);
|
|
}
|
|
stats->rpz_action[localzone_type_to_rpz_action(lzt)]++;
|
|
return ret;
|
|
}
|
|
|
|
static struct clientip_synthesized_rr*
|
|
rpz_delegation_point_ipbased_trigger_lookup(struct rpz* rpz, struct iter_qstate* is)
|
|
{
|
|
struct delegpt_addr* cursor;
|
|
struct clientip_synthesized_rr* action = NULL;
|
|
if(is->dp == NULL) { return NULL; }
|
|
for(cursor = is->dp->target_list;
|
|
cursor != NULL;
|
|
cursor = cursor->next_target) {
|
|
if(cursor->bogus) { continue; }
|
|
action = rpz_ipbased_trigger_lookup(rpz->ns_set, &cursor->addr,
|
|
cursor->addrlen, "nsip");
|
|
if(action != NULL) { return action; }
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static struct dns_msg*
|
|
rpz_apply_nsip_trigger(struct module_qstate* ms, struct rpz* r,
|
|
struct clientip_synthesized_rr* raddr, struct auth_zone* az)
|
|
{
|
|
enum rpz_action action = raddr->action;
|
|
struct dns_msg* ret = NULL;
|
|
|
|
if(r->action_override != RPZ_NO_OVERRIDE_ACTION) {
|
|
verbose(VERB_ALGO, "rpz: using override action=%s (replaces=%s)",
|
|
rpz_action_to_string(r->action_override), rpz_action_to_string(action));
|
|
action = r->action_override;
|
|
}
|
|
|
|
if(action == RPZ_LOCAL_DATA_ACTION && raddr->data == NULL) {
|
|
verbose(VERB_ALGO, "rpz: bug: nsip local data action but no local data");
|
|
ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az);
|
|
goto done;
|
|
}
|
|
|
|
switch(action) {
|
|
case RPZ_NXDOMAIN_ACTION:
|
|
ret = rpz_synthesize_nxdomain(r, ms, &ms->qinfo, az);
|
|
break;
|
|
case RPZ_NODATA_ACTION:
|
|
ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az);
|
|
break;
|
|
case RPZ_TCP_ONLY_ACTION:
|
|
/* basically a passthru here but the tcp-only will be
|
|
* honored before the query gets sent. */
|
|
ms->respip_action_info->action = respip_truncate;
|
|
ret = NULL;
|
|
break;
|
|
case RPZ_DROP_ACTION:
|
|
ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az);
|
|
ms->is_drop = 1;
|
|
break;
|
|
case RPZ_LOCAL_DATA_ACTION:
|
|
ret = rpz_synthesize_nsip_localdata(r, ms, raddr, az);
|
|
if(ret == NULL) { ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az); }
|
|
break;
|
|
case RPZ_PASSTHRU_ACTION:
|
|
ret = NULL;
|
|
ms->rpz_passthru = 1;
|
|
break;
|
|
default:
|
|
verbose(VERB_ALGO, "rpz: nsip: bug: unhandled or invalid action: '%s'",
|
|
rpz_action_to_string(action));
|
|
ret = NULL;
|
|
}
|
|
|
|
done:
|
|
if(r->log)
|
|
log_rpz_apply("nsip", NULL, &raddr->node,
|
|
action, &ms->qinfo, NULL, ms, r->log_name);
|
|
if(ms->env->worker)
|
|
ms->env->worker->stats.rpz_action[action]++;
|
|
lock_rw_unlock(&raddr->lock);
|
|
return ret;
|
|
}
|
|
|
|
static struct dns_msg*
|
|
rpz_apply_nsdname_trigger(struct module_qstate* ms, struct rpz* r,
|
|
struct local_zone* z, struct matched_delegation_point const* match,
|
|
struct auth_zone* az)
|
|
{
|
|
struct dns_msg* ret = NULL;
|
|
enum rpz_action action = localzone_type_to_rpz_action(z->type);
|
|
|
|
if(r->action_override != RPZ_NO_OVERRIDE_ACTION) {
|
|
verbose(VERB_ALGO, "rpz: using override action=%s (replaces=%s)",
|
|
rpz_action_to_string(r->action_override), rpz_action_to_string(action));
|
|
action = r->action_override;
|
|
}
|
|
|
|
switch(action) {
|
|
case RPZ_NXDOMAIN_ACTION:
|
|
ret = rpz_synthesize_nxdomain(r, ms, &ms->qinfo, az);
|
|
break;
|
|
case RPZ_NODATA_ACTION:
|
|
ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az);
|
|
break;
|
|
case RPZ_TCP_ONLY_ACTION:
|
|
/* basically a passthru here but the tcp-only will be
|
|
* honored before the query gets sent. */
|
|
ms->respip_action_info->action = respip_truncate;
|
|
ret = NULL;
|
|
break;
|
|
case RPZ_DROP_ACTION:
|
|
ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az);
|
|
ms->is_drop = 1;
|
|
break;
|
|
case RPZ_LOCAL_DATA_ACTION:
|
|
ret = rpz_synthesize_nsdname_localdata(r, ms, z, match, az);
|
|
if(ret == NULL) { ret = rpz_synthesize_nodata(r, ms, &ms->qinfo, az); }
|
|
break;
|
|
case RPZ_PASSTHRU_ACTION:
|
|
ret = NULL;
|
|
ms->rpz_passthru = 1;
|
|
break;
|
|
default:
|
|
verbose(VERB_ALGO, "rpz: nsip: bug: unhandled or invalid action: '%s'",
|
|
rpz_action_to_string(action));
|
|
ret = NULL;
|
|
}
|
|
|
|
if(r->log)
|
|
log_rpz_apply("nsdname", match->dname, NULL,
|
|
action, &ms->qinfo, NULL, ms, r->log_name);
|
|
if(ms->env->worker)
|
|
ms->env->worker->stats.rpz_action[action]++;
|
|
lock_rw_unlock(&z->lock);
|
|
return ret;
|
|
}
|
|
|
|
static struct local_zone*
|
|
rpz_delegation_point_zone_lookup(struct delegpt* dp, struct local_zones* zones,
|
|
uint16_t qclass,
|
|
/* output parameter */
|
|
struct matched_delegation_point* match)
|
|
{
|
|
struct delegpt_ns* nameserver;
|
|
struct local_zone* z = NULL;
|
|
|
|
/* the rpz specs match the nameserver names (NS records), not the
|
|
* name of the delegation point itself, to the nsdname triggers */
|
|
for(nameserver = dp->nslist;
|
|
nameserver != NULL;
|
|
nameserver = nameserver->next) {
|
|
z = rpz_find_zone(zones, nameserver->name, nameserver->namelen,
|
|
qclass, 0, 0, 0);
|
|
if(z != NULL) {
|
|
match->dname = nameserver->name;
|
|
match->dname_len = nameserver->namelen;
|
|
if(verbosity >= VERB_ALGO) {
|
|
char nm[255+1], zn[255+1];
|
|
dname_str(match->dname, nm);
|
|
dname_str(z->name, zn);
|
|
if(strcmp(nm, zn) != 0)
|
|
verbose(VERB_ALGO, "rpz: trigger nsdname %s on %s action=%s",
|
|
zn, nm, rpz_action_to_string(localzone_type_to_rpz_action(z->type)));
|
|
else
|
|
verbose(VERB_ALGO, "rpz: trigger nsdname %s action=%s",
|
|
nm, rpz_action_to_string(localzone_type_to_rpz_action(z->type)));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return z;
|
|
}
|
|
|
|
struct dns_msg*
|
|
rpz_callback_from_iterator_module(struct module_qstate* ms, struct iter_qstate* is)
|
|
{
|
|
struct auth_zones* az;
|
|
struct auth_zone* a;
|
|
struct clientip_synthesized_rr* raddr = NULL;
|
|
struct rpz* r = NULL;
|
|
struct local_zone* z = NULL;
|
|
struct matched_delegation_point match = {0};
|
|
|
|
if(ms->rpz_passthru) {
|
|
verbose(VERB_ALGO, "query is rpz_passthru, no further processing");
|
|
return NULL;
|
|
}
|
|
|
|
if(ms->env == NULL || ms->env->auth_zones == NULL) { return 0; }
|
|
|
|
az = ms->env->auth_zones;
|
|
|
|
verbose(VERB_ALGO, "rpz: iterator module callback: have_rpz=%d", az->rpz_first != NULL);
|
|
|
|
lock_rw_rdlock(&az->rpz_lock);
|
|
|
|
/* precedence of RPZ works, loosely, like this:
|
|
* CNAMEs in order of the CNAME chain. rpzs in the order they are
|
|
* configured. In an RPZ: first client-IP addr, then QNAME, then
|
|
* response IP, then NSDNAME, then NSIP. Longest match first. Smallest
|
|
* one from a set. */
|
|
/* we use the precedence rules for the topics and triggers that
|
|
* are pertinent at this stage of the resolve processing */
|
|
for(a = az->rpz_first; a != NULL; a = a->rpz_az_next) {
|
|
lock_rw_rdlock(&a->lock);
|
|
r = a->rpz;
|
|
if(r->disabled) {
|
|
lock_rw_unlock(&a->lock);
|
|
continue;
|
|
}
|
|
|
|
/* the nsdname has precedence over the nsip triggers */
|
|
z = rpz_delegation_point_zone_lookup(is->dp, r->nsdname_zones,
|
|
ms->qinfo.qclass, &match);
|
|
if(z != NULL) {
|
|
lock_rw_unlock(&a->lock);
|
|
break;
|
|
}
|
|
|
|
raddr = rpz_delegation_point_ipbased_trigger_lookup(r, is);
|
|
if(raddr != NULL) {
|
|
lock_rw_unlock(&a->lock);
|
|
break;
|
|
}
|
|
lock_rw_unlock(&a->lock);
|
|
}
|
|
|
|
lock_rw_unlock(&az->rpz_lock);
|
|
|
|
if(raddr == NULL && z == NULL)
|
|
return NULL;
|
|
|
|
if(raddr != NULL) {
|
|
if(z) {
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
return rpz_apply_nsip_trigger(ms, r, raddr, a);
|
|
}
|
|
return rpz_apply_nsdname_trigger(ms, r, z, &match, a);
|
|
}
|
|
|
|
struct dns_msg* rpz_callback_from_iterator_cname(struct module_qstate* ms,
|
|
struct iter_qstate* is)
|
|
{
|
|
struct auth_zones* az;
|
|
struct auth_zone* a = NULL;
|
|
struct rpz* r = NULL;
|
|
struct local_zone* z = NULL;
|
|
enum localzone_type lzt;
|
|
struct dns_msg* ret = NULL;
|
|
|
|
if(ms->rpz_passthru) {
|
|
verbose(VERB_ALGO, "query is rpz_passthru, no further processing");
|
|
return NULL;
|
|
}
|
|
|
|
if(ms->env == NULL || ms->env->auth_zones == NULL) { return 0; }
|
|
az = ms->env->auth_zones;
|
|
|
|
lock_rw_rdlock(&az->rpz_lock);
|
|
|
|
for(a = az->rpz_first; a; a = a->rpz_az_next) {
|
|
lock_rw_rdlock(&a->lock);
|
|
r = a->rpz;
|
|
if(r->disabled) {
|
|
lock_rw_unlock(&a->lock);
|
|
continue;
|
|
}
|
|
z = rpz_find_zone(r->local_zones, is->qchase.qname,
|
|
is->qchase.qname_len, is->qchase.qclass, 0, 0, 0);
|
|
if(z && r->action_override == RPZ_DISABLED_ACTION) {
|
|
if(r->log)
|
|
log_rpz_apply("qname", z->name, NULL,
|
|
r->action_override,
|
|
&ms->qinfo, NULL, ms, r->log_name);
|
|
if(ms->env->worker)
|
|
ms->env->worker->stats.rpz_action[r->action_override]++;
|
|
lock_rw_unlock(&z->lock);
|
|
z = NULL;
|
|
}
|
|
if(z) {
|
|
break;
|
|
}
|
|
/* not found in this auth_zone */
|
|
lock_rw_unlock(&a->lock);
|
|
}
|
|
lock_rw_unlock(&az->rpz_lock);
|
|
|
|
if(z == NULL)
|
|
return NULL;
|
|
if(r->action_override == RPZ_NO_OVERRIDE_ACTION) {
|
|
lzt = z->type;
|
|
} else {
|
|
lzt = rpz_action_to_localzone_type(r->action_override);
|
|
}
|
|
|
|
if(verbosity >= VERB_ALGO) {
|
|
char nm[255+1], zn[255+1];
|
|
dname_str(is->qchase.qname, nm);
|
|
dname_str(z->name, zn);
|
|
if(strcmp(zn, nm) != 0)
|
|
verbose(VERB_ALGO, "rpz: qname trigger after cname %s on %s, with action=%s",
|
|
zn, nm, rpz_action_to_string(localzone_type_to_rpz_action(lzt)));
|
|
else
|
|
verbose(VERB_ALGO, "rpz: qname trigger after cname %s, with action=%s",
|
|
nm, rpz_action_to_string(localzone_type_to_rpz_action(lzt)));
|
|
}
|
|
switch(localzone_type_to_rpz_action(lzt)) {
|
|
case RPZ_NXDOMAIN_ACTION:
|
|
ret = rpz_synthesize_nxdomain(r, ms, &is->qchase, a);
|
|
break;
|
|
case RPZ_NODATA_ACTION:
|
|
ret = rpz_synthesize_nodata(r, ms, &is->qchase, a);
|
|
break;
|
|
case RPZ_TCP_ONLY_ACTION:
|
|
/* basically a passthru here but the tcp-only will be
|
|
* honored before the query gets sent. */
|
|
ms->respip_action_info->action = respip_truncate;
|
|
ret = NULL;
|
|
break;
|
|
case RPZ_DROP_ACTION:
|
|
ret = rpz_synthesize_nodata(r, ms, &is->qchase, a);
|
|
ms->is_drop = 1;
|
|
break;
|
|
case RPZ_LOCAL_DATA_ACTION:
|
|
ret = rpz_synthesize_qname_localdata_msg(r, ms, &is->qchase, z, a);
|
|
if(ret == NULL) { ret = rpz_synthesize_nodata(r, ms, &is->qchase, a); }
|
|
break;
|
|
case RPZ_PASSTHRU_ACTION:
|
|
ret = NULL;
|
|
ms->rpz_passthru = 1;
|
|
break;
|
|
default:
|
|
verbose(VERB_ALGO, "rpz: qname trigger after cname: bug: unhandled or invalid action: '%s'",
|
|
rpz_action_to_string(localzone_type_to_rpz_action(lzt)));
|
|
ret = NULL;
|
|
}
|
|
lock_rw_unlock(&z->lock);
|
|
lock_rw_unlock(&a->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
rpz_apply_maybe_clientip_trigger(struct auth_zones* az, struct module_env* env,
|
|
struct query_info* qinfo, struct edns_data* edns, struct comm_reply* repinfo,
|
|
uint8_t* taglist, size_t taglen, struct ub_server_stats* stats,
|
|
sldns_buffer* buf, struct regional* temp,
|
|
/* output parameters */
|
|
struct local_zone** z_out, struct auth_zone** a_out, struct rpz** r_out,
|
|
int* passthru)
|
|
{
|
|
int ret = 0;
|
|
enum rpz_action client_action;
|
|
struct clientip_synthesized_rr* node = rpz_resolve_client_action_and_zone(
|
|
az, qinfo, repinfo, taglist, taglen, stats, z_out, a_out, r_out);
|
|
|
|
client_action = ((node == NULL) ? RPZ_INVALID_ACTION : node->action);
|
|
if(client_action == RPZ_PASSTHRU_ACTION) {
|
|
*passthru = 1;
|
|
}
|
|
if(*z_out == NULL || (client_action != RPZ_INVALID_ACTION &&
|
|
client_action != RPZ_PASSTHRU_ACTION)) {
|
|
if(client_action == RPZ_PASSTHRU_ACTION
|
|
|| client_action == RPZ_INVALID_ACTION
|
|
|| (client_action == RPZ_TCP_ONLY_ACTION
|
|
&& !rpz_is_udp_query(repinfo))) {
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
stats->rpz_action[client_action]++;
|
|
if(client_action == RPZ_LOCAL_DATA_ACTION) {
|
|
rpz_apply_clientip_localdata_action(node, env, qinfo,
|
|
edns, repinfo, buf, temp, *a_out);
|
|
} else {
|
|
if(*r_out && (*r_out)->log)
|
|
log_rpz_apply(
|
|
(node?"clientip":"qname"),
|
|
((*z_out)?(*z_out)->name:NULL),
|
|
(node?&node->node:NULL),
|
|
client_action, qinfo, repinfo, NULL,
|
|
(*r_out)->log_name);
|
|
local_zones_zone_answer(*z_out /*likely NULL, no zone*/, env, qinfo, edns,
|
|
repinfo, buf, temp, 0 /* no local data used */,
|
|
rpz_action_to_localzone_type(client_action));
|
|
if(*r_out && (*r_out)->signal_nxdomain_ra &&
|
|
LDNS_RCODE_WIRE(sldns_buffer_begin(buf))
|
|
== LDNS_RCODE_NXDOMAIN)
|
|
LDNS_RA_CLR(sldns_buffer_begin(buf));
|
|
}
|
|
ret = 1;
|
|
goto done;
|
|
}
|
|
ret = -1;
|
|
done:
|
|
if(node != NULL) {
|
|
lock_rw_unlock(&node->lock);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
rpz_callback_from_worker_request(struct auth_zones* az, struct module_env* env,
|
|
struct query_info* qinfo, struct edns_data* edns, sldns_buffer* buf,
|
|
struct regional* temp, struct comm_reply* repinfo, uint8_t* taglist,
|
|
size_t taglen, struct ub_server_stats* stats, int* passthru)
|
|
{
|
|
struct rpz* r = NULL;
|
|
struct auth_zone* a = NULL;
|
|
struct local_zone* z = NULL;
|
|
int ret;
|
|
enum localzone_type lzt;
|
|
|
|
int clientip_trigger = rpz_apply_maybe_clientip_trigger(az, env, qinfo,
|
|
edns, repinfo, taglist, taglen, stats, buf, temp, &z, &a, &r,
|
|
passthru);
|
|
if(clientip_trigger >= 0) {
|
|
if(a) {
|
|
lock_rw_unlock(&a->lock);
|
|
}
|
|
if(z) {
|
|
lock_rw_unlock(&z->lock);
|
|
}
|
|
return clientip_trigger;
|
|
}
|
|
|
|
if(z == NULL) {
|
|
if(a) {
|
|
lock_rw_unlock(&a->lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
log_assert(r);
|
|
|
|
if(r->action_override == RPZ_NO_OVERRIDE_ACTION) {
|
|
lzt = z->type;
|
|
} else {
|
|
lzt = rpz_action_to_localzone_type(r->action_override);
|
|
}
|
|
if(r->action_override == RPZ_PASSTHRU_ACTION ||
|
|
lzt == local_zone_always_transparent /* RPZ_PASSTHRU_ACTION */) {
|
|
*passthru = 1;
|
|
}
|
|
|
|
if(verbosity >= VERB_ALGO) {
|
|
char nm[255+1], zn[255+1];
|
|
dname_str(qinfo->qname, nm);
|
|
dname_str(z->name, zn);
|
|
if(strcmp(zn, nm) != 0)
|
|
verbose(VERB_ALGO, "rpz: qname trigger %s on %s with action=%s",
|
|
zn, nm, rpz_action_to_string(localzone_type_to_rpz_action(lzt)));
|
|
else
|
|
verbose(VERB_ALGO, "rpz: qname trigger %s with action=%s",
|
|
nm, rpz_action_to_string(localzone_type_to_rpz_action(lzt)));
|
|
}
|
|
|
|
ret = rpz_synthesize_qname_localdata(env, r, z, lzt, qinfo, edns, buf, temp,
|
|
repinfo, stats);
|
|
|
|
lock_rw_unlock(&z->lock);
|
|
lock_rw_unlock(&a->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void rpz_enable(struct rpz* r)
|
|
{
|
|
if(!r)
|
|
return;
|
|
r->disabled = 0;
|
|
}
|
|
|
|
void rpz_disable(struct rpz* r)
|
|
{
|
|
if(!r)
|
|
return;
|
|
r->disabled = 1;
|
|
}
|