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https://github.com/NLnetLabs/unbound.git
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Fix for lame reply corner case.
git-svn-id: file:///svn/unbound/trunk@2168 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards
parent
60035e31a2
commit
14f178e486
7 changed files with 362 additions and 3 deletions
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@ -1,3 +1,8 @@
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25 June 2010: Wouter
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- Fix handling of corner case reply from lame server, follows rfc2308.
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It could lead to a nodata reply getting into the cache if the search
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for a non-lame server turned up other misconfigured servers.
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23 June 2010: Wouter
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- iana portlist updated.
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- makedist upgraded cross compile openssl option, like this:
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@ -225,9 +225,14 @@ response_type_from_server(int rdset,
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/* Or if a lame server is deployed,
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* which gives ns==zone delegation from cache
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* without AA bit as well, with nodata nosoa*/
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/* real answer must be +AA and SOA RFC(2308),
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* so this is wrong, and we SERVFAIL it if
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* this is the only possible reply, if it
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* is misdeployed the THROWAWAY makes us pick
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* the next server from the selection */
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if(msg->rep->an_numrrsets==0 &&
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!(msg->rep->flags&BIT_AA) && !rdset)
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return RESPONSE_TYPE_REC_LAME;
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return RESPONSE_TYPE_THROWAWAY;
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return RESPONSE_TYPE_ANSWER;
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}
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/* If we are getting a referral upwards (or to
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@ -54,6 +54,7 @@
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#include "util/config_file.h"
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#include "services/listen_dnsport.h"
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#include "services/outside_network.h"
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#include "services/cache/infra.h"
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#include "testcode/replay.h"
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#include "testcode/ldns-testpkts.h"
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#include "util/log.h"
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@ -134,6 +135,7 @@ repevt_string(enum replay_event_type t)
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case repevt_error: return "ERROR";
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case repevt_assign: return "ASSIGN";
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case repevt_traffic: return "TRAFFIC";
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case repevt_infra_rtt: return "INFRA_RTT";
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default: return "UNKNOWN";
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}
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}
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@ -541,6 +543,18 @@ autotrust_check(struct replay_runtime* runtime, struct replay_moment* mom)
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log_info("autotrust %s is OK", mom->autotrust_id);
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}
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/** Store RTT in infra cache */
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static void
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do_infra_rtt(struct replay_runtime* runtime)
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{
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struct replay_moment* now = runtime->now;
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int rto = infra_rtt_update(runtime->infra, &now->addr,
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now->addrlen, atoi(now->string), -1, runtime->now_secs);
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log_addr(0, "INFRA_RTT for", &now->addr, now->addrlen);
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log_info("INFRA_RTT(roundtrip %d): rto of %d", atoi(now->string), rto);
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if(rto == 0) fatal_exit("infra_rtt_update failed");
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}
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/**
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* Advance to the next moment.
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*/
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@ -619,6 +633,10 @@ do_moment_and_advance(struct replay_runtime* runtime)
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case repevt_traffic:
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advance_moment(runtime);
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break;
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case repevt_infra_rtt:
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do_infra_rtt(runtime);
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advance_moment(runtime);
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break;
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default:
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fatal_exit("testbound: unknown event type %d",
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runtime->now->evt_type);
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@ -847,18 +865,20 @@ outside_network_create(struct comm_base* base, size_t bufsize,
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size_t ATTR_UNUSED(num_ports), char** ATTR_UNUSED(ifs),
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int ATTR_UNUSED(num_ifs), int ATTR_UNUSED(do_ip4),
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int ATTR_UNUSED(do_ip6), size_t ATTR_UNUSED(num_tcp),
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struct infra_cache* ATTR_UNUSED(infra),
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struct infra_cache* infra,
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struct ub_randstate* ATTR_UNUSED(rnd),
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int ATTR_UNUSED(use_caps_for_id), int* ATTR_UNUSED(availports),
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int ATTR_UNUSED(numavailports), size_t ATTR_UNUSED(unwanted_threshold),
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void (*unwanted_action)(void*), void* ATTR_UNUSED(unwanted_param),
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int ATTR_UNUSED(do_udp))
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{
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struct replay_runtime* runtime = (struct replay_runtime*)base;
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struct outside_network* outnet = calloc(1,
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sizeof(struct outside_network));
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(void)unwanted_action;
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if(!outnet)
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return NULL;
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runtime->infra = infra;
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outnet->base = base;
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outnet->udp_buff = ldns_buffer_new(bufsize);
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if(!outnet->udp_buff)
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@ -330,6 +330,24 @@ replay_moment_read(char* remain, FILE* in, const char* name, int* lineno,
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} else if(parse_keyword(&remain, "ASSIGN")) {
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mom->evt_type = repevt_assign;
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read_assign_step(remain, mom);
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} else if(parse_keyword(&remain, "INFRA_RTT")) {
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char *s;
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mom->evt_type = repevt_infra_rtt;
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while(isspace((int)*remain))
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remain++;
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s = remain;
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remain = strchr(s, ' ');
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if(!remain) fatal_exit("expected two args for INFRA_RTT");
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remain[0] = 0;
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remain++;
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while(isspace((int)*remain))
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remain++;
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if(!extstrtoaddr(s, &mom->addr, &mom->addrlen))
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fatal_exit("bad infra_rtt address %s", s);
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if(strlen(remain)>0 && remain[strlen(remain)-1]=='\n')
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remain[strlen(remain)-1] = 0;
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mom->string = strdup(remain);
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if(!mom->string) fatal_exit("out of memory");
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} else {
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log_err("%d: unknown event type %s", *lineno, remain);
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free(mom);
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@ -75,6 +75,7 @@
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* the step waits for traffic to stop.
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* o CHECK_AUTOTRUST [id] - followed by FILE_BEGIN [to match] FILE_END.
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* The file contents is macro expanded before match.
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* o INFRA_RTT [ip] [rtt] - update infra cache entry with rtt.
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* o ERROR
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* ; following entry starts on the next line, ENTRY_BEGIN.
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* ; more STEP items
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@ -136,6 +137,7 @@ struct replay_range;
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struct fake_pending;
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struct fake_timer;
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struct replay_var;
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struct infra_cache;
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/**
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* A replay scenario.
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@ -196,6 +198,8 @@ struct replay_moment {
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repevt_error,
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/** assignment to a variable */
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repevt_assign,
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/** store infra rtt cache entry: addr and string (int) */
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repevt_infra_rtt,
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/** cause traffic to flow */
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repevt_traffic
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}
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@ -285,6 +289,9 @@ struct replay_runtime {
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/** user argument for incoming query callback */
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void *cb_arg;
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/** ref the infra cache (was passed to outside_network_create) */
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struct infra_cache* infra;
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/** the current time in seconds */
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uint32_t now_secs;
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/** the current time in microseconds */
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290
testdata/iter_lame_nosoa.rpl
vendored
Normal file
290
testdata/iter_lame_nosoa.rpl
vendored
Normal file
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@ -0,0 +1,290 @@
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; config options
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server:
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target-fetch-policy: "0 0 0 0 0"
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stub-zone:
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name: "."
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stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
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CONFIG_END
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SCENARIO_BEGIN Test resolution with lame reply looks like nodata with noSOA
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; K.ROOT-SERVERS.NET.
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RANGE_BEGIN 0 100
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ADDRESS 193.0.14.129
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR NOERROR
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SECTION QUESTION
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. IN NS
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SECTION ANSWER
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. IN NS K.ROOT-SERVERS.NET.
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SECTION ADDITIONAL
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K.ROOT-SERVERS.NET. IN A 193.0.14.129
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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com. IN NS
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SECTION AUTHORITY
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com. IN NS a.gtld-servers.net.
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SECTION ADDITIONAL
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a.gtld-servers.net. IN A 192.5.6.30
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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net. IN NS
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SECTION AUTHORITY
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net. IN NS e.gtld-servers.net.
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SECTION ADDITIONAL
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e.gtld-servers.net. IN A 192.12.94.30
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ENTRY_END
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RANGE_END
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; a.gtld-servers.net.
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RANGE_BEGIN 0 100
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ADDRESS 192.5.6.30
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR NOERROR
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SECTION QUESTION
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com. IN NS
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SECTION ANSWER
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com. IN NS a.gtld-servers.net.
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SECTION ADDITIONAL
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a.gtld-servers.net. IN A 192.5.6.30
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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example.com. IN NS
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SECTION AUTHORITY
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example.com. IN NS ns.example.net.
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ns.example.com. IN A 1.2.3.55
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ENTRY_END
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RANGE_END
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; e.gtld-servers.net.
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RANGE_BEGIN 0 100
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ADDRESS 192.12.94.30
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR NOERROR
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SECTION QUESTION
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net. IN NS
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SECTION ANSWER
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net. IN NS e.gtld-servers.net.
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SECTION ADDITIONAL
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e.gtld-servers.net. IN A 192.12.94.30
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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example.net. IN NS
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SECTION AUTHORITY
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example.net. IN NS ns.example.net.
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SECTION ADDITIONAL
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ns.example.net. IN A 1.2.3.44
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ENTRY_END
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RANGE_END
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; ns.example.net.
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; advertises +RA so it is REC_LAME.
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RANGE_BEGIN 0 100
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ADDRESS 1.2.3.44
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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example.net. IN NS
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SECTION ANSWER
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example.net. IN NS ns.example.net.
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SECTION ADDITIONAL
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ns.example.net. IN A 1.2.3.44
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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ns.example.net. IN A
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SECTION ANSWER
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ns.example.net. IN A 1.2.3.44
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SECTION AUTHORITY
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example.net. IN NS ns.example.net.
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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ns.example.net. IN AAAA
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SECTION AUTHORITY
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example.net. IN NS ns.example.net.
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SECTION ADDITIONAL
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www.example.net. IN A 1.2.3.44
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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example.com. IN NS
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SECTION ANSWER
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example.com. IN NS ns.example.net.
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ns.example.com. IN A 1.2.3.55
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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ns.example.com. IN AAAA
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SECTION ANSWER
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SECTION AUTHORITY
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example.com. IN NS ns.example.net.
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ns.example.com. IN A 1.2.3.55
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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ns.example.com. IN A
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SECTION ANSWER
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ns.example.com. IN A 1.2.3.55
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SECTION AUTHORITY
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example.com. IN NS ns.example.net.
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example.com. IN NS ns.example.com.
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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www.example.com. IN A 10.20.30.40
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SECTION AUTHORITY
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example.com. IN NS ns.example.net.
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ns.example.com. IN A 1.2.3.55
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ns.example.net IN A 1.2.3.44
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR RA NOERROR
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SECTION QUESTION
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mail.example.com. IN A
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SECTION ANSWER
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SECTION AUTHORITY
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example.com. IN NS ns.example.net.
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ENTRY_END
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RANGE_END
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; ns.example.com.
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; is like a BIND server that is LAME, authoritative for other domains,
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; but not this one, and somehow got this NS record in its cache.
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; trying to give 'lame referral' but to the same name, not up.
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RANGE_BEGIN 0 100
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ADDRESS 1.2.3.55
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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example.com. IN NS
|
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SECTION AUTHORITY
|
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example.com. IN NS ns.example.com.
|
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SECTION ADDITIONAL
|
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ENTRY_END
|
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RANGE_END
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|
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; store bad timing for one server to influence server selection
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; 1.2.3.44 (ns.example.net) gets 900 msec.
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; so the 376 ns.example.com is preferred.
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STEP 1 INFRA_RTT 1.2.3.44 900
|
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STEP 10 QUERY
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ENTRY_BEGIN
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REPLY RD
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SECTION QUESTION
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www.example.com. IN A
|
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ENTRY_END
|
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|
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; recursion happens here.
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STEP 20 CHECK_ANSWER
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ENTRY_BEGIN
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MATCH all
|
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REPLY QR RD RA NOERROR
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SECTION QUESTION
|
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www.example.com. IN A
|
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SECTION ANSWER
|
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www.example.com. IN A 10.20.30.40
|
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SECTION AUTHORITY
|
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example.com. IN NS ns.example.net.
|
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example.com. IN NS ns.example.com.
|
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SECTION ADDITIONAL
|
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ns.example.com. IN A 1.2.3.55
|
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; scrubbed off
|
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;ns.example.net IN A 1.2.3.44
|
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ENTRY_END
|
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|
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; query to recursion-lame server
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STEP 30 QUERY
|
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ENTRY_BEGIN
|
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REPLY RD
|
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SECTION QUESTION
|
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mail.example.com. IN A
|
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ENTRY_END
|
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|
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STEP 40 CHECK_ANSWER
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ENTRY_BEGIN
|
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MATCH all
|
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REPLY QR RD RA NOERROR
|
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SECTION QUESTION
|
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mail.example.com. IN A
|
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SECTION ANSWER
|
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SECTION AUTHORITY
|
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example.com. IN NS ns.example.net.
|
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example.com. IN NS ns.example.com.
|
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SECTION ADDITIONAL
|
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ENTRY_END
|
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|
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|
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SCENARIO_END
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14
testdata/val_ds_gost_downgrade.rpl
vendored
14
testdata/val_ds_gost_downgrade.rpl
vendored
|
|
@ -162,6 +162,20 @@ ns.sub.example.com. IN A 1.2.3.6
|
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ns.sub.example.com. 3600 IN RRSIG A 12 4 3600 20070926134150 20070829134150 60385 sub.example.com. kJEyinL7BkpiPW2HxmFHRLAi68EdrLXToJiK83a5cedDe5ABL7c/k+nFHd3WjATUtVoueY3pSnCDVCJaFmd+/A== ;{id = 60385}
|
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ENTRY_END
|
||||
|
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ENTRY_BEGIN
|
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MATCH opcode qtype qname
|
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ADJUST copy_id
|
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REPLY QR AA NOERROR
|
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SECTION QUESTION
|
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ns.sub.example.com. IN A
|
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SECTION ANSWER
|
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ns.sub.example.com. IN A 1.2.3.6
|
||||
ns.sub.example.com. 3600 IN RRSIG A 12 4 3600 20070926134150 20070829134150 60385 sub.example.com. kJEyinL7BkpiPW2HxmFHRLAi68EdrLXToJiK83a5cedDe5ABL7c/k+nFHd3WjATUtVoueY3pSnCDVCJaFmd+/A== ;{id = 60385}
|
||||
SECTION AUTHORITY
|
||||
sub.example.com. IN NS ns.sub.example.com.
|
||||
sub.example.com. 3600 IN RRSIG NS 12 3 3600 20070926134150 20070829134150 60385 sub.example.com. 6mNrX32/DC2RU1A+yWCccn5H6wnsbNYTlf8e/LyF1fsuNfw6tH12sKGBCtk1mp4HpDIgH02HDHplJskSFOvzTw== ;{id = 60385}
|
||||
ENTRY_END
|
||||
|
||||
; response to DNSKEY priming query
|
||||
ENTRY_BEGIN
|
||||
MATCH opcode qtype qname
|
||||
|
|
|
|||
Loading…
Reference in a new issue