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Fixup scrubber and lameness.

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git-svn-id: file:///svn/unbound/trunk@478 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2007-08-02 11:44:17 +00:00
parent c9a1cdec68
commit 947bd1ab91
3 changed files with 132 additions and 3 deletions
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2
doc/Changelog
View file

@ -2,6 +2,8 @@
- configure change for latest libevent trunk version (needs -lrt).
- query_done and walk_supers are moved out of module interface.
- fixup delegation point duplicates.
- fixup iterator scrubber; lame NS set is let through the scrubber
so that the classification is lame.
1 August 2007: Wouter
- set version to 0.5

15
iterator/iter_scrub.c
View file

@ -515,17 +515,26 @@ scrub_sanitize(ldns_buffer* pkt, struct msg_parse* msg, uint8_t* zonename,
* same check can be used */
if(!pkt_sub(pkt, rrset->dname, zonename)) {
if(!env->cfg->harden_glue) {
if(msg->an_rrsets == 0 &&
rrset->type == LDNS_RR_TYPE_NS &&
FLAGS_GET_RCODE(msg->flags) ==
LDNS_RCODE_NOERROR) {
/* noerror, nodata and this NS rrset is above
* the zone. This is LAME!
* Leave in the NS for lame classification. */
} else if(!env->cfg->harden_glue) {
/* store in cache! Since it is relevant
* (from normalize) it will be picked up
* from the cache to be used later */
store_rrset(pkt, msg, env, rrset);
remove_rrset("sanitize: storing potential "
"poison RRset:", pkt, msg, prev, &rrset);
} else
continue;
} else {
remove_rrset("sanitize: removing potential "
"poison RRset:", pkt, msg, prev, &rrset);
continue;
continue;
}
}
prev = rrset;
rrset = rrset->rrset_all_next;

118
testdata/iter_lamescrub.rpl vendored Normal file
View file

@ -0,0 +1,118 @@
; config options
stub-zone:
name: "."
stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
CONFIG_END
SCENARIO_BEGIN Test lameness detection after scrubber.
; 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 qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
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
www.example.com. IN A
SECTION AUTHORITY
example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ENTRY_END
RANGE_END
; ns.example.com.
; This server is Lame!
RANGE_BEGIN 0 100
ADDRESS 1.2.3.4
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR RD NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
SECTION AUTHORITY
com. 155182 IN NS a.gtld-servers.net.
com. 155182 IN NS b.gtld-servers.net.
com. 155182 IN NS c.gtld-servers.net.
com. 155182 IN NS d.gtld-servers.net.
com. 155182 IN NS e.gtld-servers.net.
com. 155182 IN NS f.gtld-servers.net.
com. 155182 IN NS g.gtld-servers.net.
com. 155182 IN NS h.gtld-servers.net.
com. 155182 IN NS i.gtld-servers.net.
com. 155182 IN NS j.gtld-servers.net.
com. 155182 IN NS k.gtld-servers.net.
com. 155182 IN NS l.gtld-servers.net.
com. 155182 IN NS m.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. 155182 IN A 192.5.6.30
b.gtld-servers.net. 155182 IN A 192.33.14.30
c.gtld-servers.net. 155182 IN A 192.26.92.30
d.gtld-servers.net. 155182 IN A 192.31.80.30
e.gtld-servers.net. 155182 IN A 192.12.94.30
f.gtld-servers.net. 155182 IN A 192.35.51.30
g.gtld-servers.net. 155182 IN A 192.42.93.30
h.gtld-servers.net. 155182 IN A 192.54.112.30
i.gtld-servers.net. 155182 IN A 192.43.172.30
j.gtld-servers.net. 155182 IN A 192.48.79.30
k.gtld-servers.net. 155182 IN A 192.52.178.30
l.gtld-servers.net. 155182 IN A 192.41.162.30
m.gtld-servers.net. 155182 IN A 192.55.83.30
a.gtld-servers.net. 155182 IN AAAA 2001:503:a83e::2:30
ENTRY_END
RANGE_END
STEP 1 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www.example.com. IN A
ENTRY_END
; recursin happens here
; check that the answer is a failure (lame server)
; and not a nodata-noerror message (false answer classification).
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA SERVFAIL
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
SECTION AUTHORITY
SECTION ADDITIONAL
ENTRY_END
SCENARIO_END