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failover for dnssec bogus
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git-svn-id: https://unbound.nlnetlabs.nl/svn/trunk@4478 be551aaa-1e26-0410-a405-d3ace91eadb9
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wouter committed Jan 31, 2018
1 parent 9f91e3c commit df057ff
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30 changes: 30 additions & 0 deletions iterator/iterator.c
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Original file line number Diff line number Diff line change
Expand Up @@ -862,8 +862,38 @@ auth_zone_delegpt(struct module_qstate* qstate, struct iter_qstate* iq,
lock_rw_rdlock(&z->lock);
lock_rw_unlock(&qstate->env->auth_zones->lock);
if(z->for_upstream) {
if(iq->dp && query_dname_compare(z->name, iq->dp->name) == 0
&& iq->dp->auth_dp && qstate->blacklist &&
z->fallback_enabled) {
/* cache is blacklisted and fallback, and we
* already have an auth_zone dp */
if(verbosity>=VERB_ALGO) {
char buf[255+1];
dname_str(z->name, buf);
verbose(VERB_ALGO, "auth_zone %s "
"fallback because cache blacklisted",
buf);
}
lock_rw_unlock(&z->lock);
iq->dp = NULL;
return 1;
}
if(iq->dp==NULL || dname_subdomain_c(z->name, iq->dp->name)) {
struct delegpt* dp;
if(qstate->blacklist && z->fallback_enabled) {
/* cache is blacklisted because of a DNSSEC
* validation failure, and the zone allows
* fallback to the internet, query there. */
if(verbosity>=VERB_ALGO) {
char buf[255+1];
dname_str(z->name, buf);
verbose(VERB_ALGO, "auth_zone %s "
"fallback because cache blacklisted",
buf);
}
lock_rw_unlock(&z->lock);
return 1;
}
dp = (struct delegpt*)regional_alloc_zero(
qstate->region, sizeof(*dp));
if(!dp) {
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202 changes: 202 additions & 0 deletions testdata/auth_zonefile_dnssec_fail.rpl
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Original file line number Diff line number Diff line change
@@ -0,0 +1,202 @@
; config options
server:
trust-anchor: "example.com. 3600 IN DS 2854 3 1 46e4ffc6e9a4793b488954bd3f0cc6af0dfb201b"
val-override-date: "20070916134226"
target-fetch-policy: "0 0 0 0 0"
fake-sha1: yes
trust-anchor-signaling: no

auth-zone:
name: "example.com."
## zonefile (or none).
## zonefile: "example.com.zone"
## master by IP address or hostname
## can list multiple masters, each on one line.
## master:
## url for http fetch
## url:
## queries from downstream clients get authoritative answers.
## for-downstream: yes
for-downstream: no
## queries are used to fetch authoritative answers from this zone,
## instead of unbound itself sending queries there.
## for-upstream: yes
for-upstream: yes
## on failures with for-upstream, fallback to sending queries to
## the authority servers
## fallback-enabled: no
fallback-enabled: yes

## this line generates zonefile: \n"/tmp/xxx.example.com"\n
zonefile:
TEMPFILE_NAME example.com
## this is the inline file /tmp/xxx.example.com
## the tempfiles are deleted when the testrun is over.
TEMPFILE_CONTENTS example.com
$ORIGIN example.com.
example 3600 IN SOA dns.example.de. hostmaster.dns.example.de. (
1379078166 28800 7200 604800 7200 )
3600 IN NS ns.example.com.
example.com. 3600 IN RRSIG NS 3 2 3600 20070926134150 20070829134150 2854 example.com. MC0CFQCN+qHdJxoI/2tNKwsb08pra/G7aAIUAWA5sDdJTbrXA1/3OaesGBAO3sI= ;{id = 2854}
example.com. 3600 IN DNSKEY 256 3 3 ALXLUsWqUrY3JYER3T4TBJII s70j+sDS/UT2QRp61SE7S3E EXopNXoFE73JLRmvpi/UrOO/Vz4Se 6wXv/CYCKjGw06U4WRgR YXcpEhJROyNapmdIKSx hOzfLVE1gqA0PweZR8d tY3aNQSRn3sPpwJr6Mi /PqQKAMMrZ9ckJpf1+b QMOOvxgzz2U1GS18b3y ZKcgTMEaJzd/GZYzi/B N2DzQ0MsrSwYXfsNLFO Bbs8PJMW4LYIxeeOe6rUgkWOF 7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}
example.com. 3600 IN RRSIG DNSKEY 3 2 3600 20070926134802 20070829134802 2854 example.com. MCwCFG1yhRNtTEa3Eno2zhVVuy2EJX3wAhQeLyUp6+UXcpC5qGNu9tkrTEgPUg== ;{id = 2854}

ns.example.com. IN A 1.2.3.4
ns.example.com. 3600 IN RRSIG A 3 3 3600 20070926135752 20070829135752 2854 example.com. MC0CFQCMSWxVehgOQLoYclB9PIAbNP229AIUeH0vNNGJhjnZiqgIOKvs1EhzqAo= ;{id = 2854}

; this RR is edited to create the failure
;www.example.com. IN A 10.20.30.40
www.example.com. IN A 127.0.0.1
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}

TEMPFILE_END

stub-zone:
name: "."
stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
CONFIG_END

SCENARIO_BEGIN Test authority zone with zonefile and dnssec failure
; the zone file has signatures, used upstream, unbound validates the reply.
; but that fails and now it tries again, with failover to internet hosted
; (correct) contents.

; K.ROOT-SERVERS.NET.
RANGE_BEGIN 0 100
ADDRESS 193.0.14.129
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
. IN NS
SECTION ANSWER
. IN NS K.ROOT-SERVERS.NET.
SECTION ADDITIONAL
K.ROOT-SERVERS.NET. IN A 193.0.14.129
ENTRY_END

ENTRY_BEGIN
MATCH opcode subdomain
ADJUST copy_id copy_query
REPLY QR NOERROR
SECTION QUESTION
com. IN NS
SECTION AUTHORITY
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END
RANGE_END

; a.gtld-servers.net.
RANGE_BEGIN 0 100
ADDRESS 192.5.6.30
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
com. IN NS
SECTION ANSWER
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END

ENTRY_BEGIN
MATCH opcode subdomain
ADJUST copy_id copy_query
REPLY QR NOERROR
SECTION QUESTION
example.com. IN NS
SECTION AUTHORITY
example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.44
ENTRY_END
RANGE_END

; ns.example.net.
RANGE_BEGIN 0 100
ADDRESS 1.2.3.44
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
example.net. IN NS
SECTION ANSWER
example.net. IN NS ns.example.net.
SECTION ADDITIONAL
ns.example.net. IN A 1.2.3.44
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
ns.example.net. IN A
SECTION ANSWER
ns.example.net. IN A 1.2.3.44
SECTION AUTHORITY
example.net. IN NS ns.example.net.
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
ns.example.net. IN AAAA
SECTION AUTHORITY
example.net. IN NS ns.example.net.
SECTION ADDITIONAL
www.example.net. IN A 1.2.3.44
ENTRY_END

; response to DNSKEY priming query
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
example.com. IN DNSKEY
SECTION ANSWER
example.com. 3600 IN DNSKEY 256 3 3 ALXLUsWqUrY3JYER3T4TBJII s70j+sDS/UT2QRp61SE7S3E EXopNXoFE73JLRmvpi/UrOO/Vz4Se 6wXv/CYCKjGw06U4WRgR YXcpEhJROyNapmdIKSx hOzfLVE1gqA0PweZR8d tY3aNQSRn3sPpwJr6Mi /PqQKAMMrZ9ckJpf1+b QMOOvxgzz2U1GS18b3y ZKcgTMEaJzd/GZYzi/B N2DzQ0MsrSwYXfsNLFO Bbs8PJMW4LYIxeeOe6rUgkWOF 7CC9Dh/dduQ1QrsJhmZAEFfd6ByYV+ ;{id = 2854 (zsk), size = 1688b}
example.com. 3600 IN RRSIG DNSKEY 3 2 3600 20070926134802 20070829134802 2854 example.com. MCwCFG1yhRNtTEa3Eno2zhVVuy2EJX3wAhQeLyUp6+UXcpC5qGNu9tkrTEgPUg== ;{id = 2854}
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}
ENTRY_END
RANGE_END

STEP 1 QUERY
ENTRY_BEGIN
REPLY RD DO
SECTION QUESTION
www.example.com. IN A
ENTRY_END

; recursion happens here.
STEP 20 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD DO RA AD NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
www.example.com. 3600 IN RRSIG A 3 3 3600 20070926134150 20070829134150 2854 example.com. MC0CFC99iE9K5y2WNgI0gFvBWaTi9wm6AhUAoUqOpDtG5Zct+Qr9F3mSdnbc6V4= ;{id = 2854}
ENTRY_END

SCENARIO_END

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