mir/bind
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/bind9 synced 2025-08-31 06:25:31 +00:00
Code Issues Releases Wiki Activity

4420. [func] nslookup now looks for AAAA as well as A by default.

Browse Source 
[RT #40420]
This commit is contained in:
Mark Andrews
2016-07-22 03:27:49 +10:00
parent e4d4de075a
commit e7e7efe901
4 changed files with 186 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
CHANGES
View File

@@ -1,3 +1,6 @@
4420. [func] nslookup now looks for AAAA as well as A by default.
[RT #40420]
4419. [bug] Don't cause undefined result if the label of an
entry in catalog zone is changed. [RT #42708]

117
bin/dig/nslookup.c
View File

@@ -46,7 +46,8 @@ static isc_boolean_t short_form = ISC_TRUE,
comments = ISC_TRUE, section_question = ISC_TRUE,
section_answer = ISC_TRUE, section_authority = ISC_TRUE,
section_additional = ISC_TRUE, recurse = ISC_TRUE,
aaonly = ISC_FALSE, nofail = ISC_TRUE;
aaonly = ISC_FALSE, nofail = ISC_TRUE,
default_lookups = ISC_TRUE, a_noanswer = ISC_FALSE;
static isc_boolean_t interactive;
@@ -182,9 +183,9 @@ printsoa(dns_rdata_t *rdata) {
}
static void
printa(dns_rdata_t *rdata) {
printaddr(dns_rdata_t *rdata) {
isc_result_t result;
char text[sizeof("255.255.255.255")];
char text[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")];
isc_buffer_t b;
isc_buffer_init(&b, text, sizeof(text));
@@ -193,6 +194,7 @@ printa(dns_rdata_t *rdata) {
printf("Address: %.*s\n", (int)isc_buffer_usedlength(&b),
(char *)isc_buffer_base(&b));
}
#ifdef DIG_SIGCHASE
/* Just for compatibility : not use in host program */
isc_result_t
@@ -264,12 +266,13 @@ printsection(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers,
dns_rdataset_current(rdataset, &rdata);
switch (rdata.type) {
case dns_rdatatype_a:
case dns_rdatatype_aaaa:
if (section != DNS_SECTION_ANSWER)
goto def_short_section;
dns_name_format(name, namebuf,
sizeof(namebuf));
printf("Name:\t%s\n", namebuf);
printa(&rdata);
printaddr(&rdata);
break;
case dns_rdatatype_soa:
dns_name_format(name, namebuf,
@@ -400,6 +403,31 @@ trying(char *frm, dig_lookup_t *lookup) {
}
static void
chase_cnamechain(dns_message_t *msg, dns_name_t *qname) {
isc_result_t result;
dns_rdataset_t *rdataset;
dns_rdata_cname_t cname;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned int i = msg->counts[DNS_SECTION_ANSWER];
while (i-- > 0) {
rdataset = NULL;
result = dns_message_findname(msg, DNS_SECTION_ANSWER, qname,
dns_rdatatype_cname, 0, NULL, &rdataset);
if (result != ISC_R_SUCCESS)
return;
result = dns_rdataset_first(rdataset);
check_result(result, "dns_rdataset_first");
dns_rdata_reset(&rdata);
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &cname, NULL);
check_result(result, "dns_rdata_tostruct");
dns_name_copy(&cname.cname, qname, NULL);
dns_rdata_freestruct(&cname);
}
}
isc_result_t
printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
char servtext[ISC_SOCKADDR_FORMATSIZE];
@@ -409,11 +437,13 @@ printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
debug("printmessage()");
isc_sockaddr_format(&query->sockaddr, servtext, sizeof(servtext));
printf("Server:\t\t%s\n", query->userarg);
printf("Address:\t%s\n", servtext);
if(!default_lookups || query->lookup->rdtype == dns_rdatatype_a) {
isc_sockaddr_format(&query->sockaddr, servtext, sizeof(servtext));
printf("Server:\t\t%s\n", query->userarg);
printf("Address:\t%s\n", servtext);
puts("");
puts("");
}
if (!short_form) {
puts("------------");
@@ -438,16 +468,50 @@ printmessage(dig_query_t *query, dns_message_t *msg, isc_boolean_t headers) {
return (ISC_R_SUCCESS);
}
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0)
if ( default_lookups && query->lookup->rdtype == dns_rdatatype_a) {
char namestr[DNS_NAME_FORMATSIZE];
dig_lookup_t *lookup;
dns_fixedname_t fixed;
dns_name_t *name;
/* Add AAAA lookup. */
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
dns_name_copy(query->lookup->name, name, NULL);
chase_cnamechain(msg, name);
dns_name_format(name, namestr, sizeof(namestr));
lookup = clone_lookup(query->lookup, ISC_FALSE);
if (lookup != NULL) {
strncpy(lookup->textname, namestr,
sizeof(lookup->textname));
lookup->textname[sizeof(lookup->textname)-1] = 0;
lookup->rdtype = dns_rdatatype_aaaa;
lookup->rdtypeset = ISC_TRUE;
lookup->origin = NULL;
lookup->retries = tries;
ISC_LIST_APPEND(lookup_list, lookup, link);
}
}
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0 &&
( !default_lookups || query->lookup->rdtype == dns_rdatatype_a) )
puts("Non-authoritative answer:");
if (!ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER]))
printsection(query, msg, headers, DNS_SECTION_ANSWER);
else
printf("*** Can't find %s: No answer\n",
query->lookup->textname);
else {
if (default_lookups && query->lookup->rdtype == dns_rdatatype_a)
a_noanswer = ISC_TRUE;
else if (!default_lookups ||
(query->lookup->rdtype == dns_rdatatype_aaaa &&
a_noanswer ) )
printf("*** Can't find %s: No answer\n",
query->lookup->textname);
}
if (((msg->flags & DNS_MESSAGEFLAG_AA) == 0) &&
(query->lookup->rdtype != dns_rdatatype_a)) {
(query->lookup->rdtype != dns_rdatatype_a) &&
(query->lookup->rdtype != dns_rdatatype_aaaa) ) {
puts("\nAuthoritative answers can be found from:");
printsection(query, msg, headers,
DNS_SECTION_AUTHORITY);
@@ -585,23 +649,35 @@ setoption(char *opt) {
if (testclass(&opt[3]))
strlcpy(defclass, &opt[3], sizeof(defclass));
} else if (strncasecmp(opt, "type=", 5) == 0) {
if (testtype(&opt[5]))
if (testtype(&opt[5])) {
strlcpy(deftype, &opt[5], sizeof(deftype));
default_lookups = ISC_FALSE;
}
} else if (strncasecmp(opt, "ty=", 3) == 0) {
if (testtype(&opt[3]))
if (testtype(&opt[3])) {
strlcpy(deftype, &opt[3], sizeof(deftype));
default_lookups = ISC_FALSE;
}
} else if (strncasecmp(opt, "querytype=", 10) == 0) {
if (testtype(&opt[10]))
if (testtype(&opt[10])) {
strlcpy(deftype, &opt[10], sizeof(deftype));
default_lookups = ISC_FALSE;
}
} else if (strncasecmp(opt, "query=", 6) == 0) {
if (testtype(&opt[6]))
if (testtype(&opt[6])) {
strlcpy(deftype, &opt[6], sizeof(deftype));
default_lookups = ISC_FALSE;
}
} else if (strncasecmp(opt, "qu=", 3) == 0) {
if (testtype(&opt[3]))
if (testtype(&opt[3])) {
strlcpy(deftype, &opt[3], sizeof(deftype));
default_lookups = ISC_FALSE;
}
} else if (strncasecmp(opt, "q=", 2) == 0) {
if (testtype(&opt[2]))
if (testtype(&opt[2])) {
strlcpy(deftype, &opt[2], sizeof(deftype));
default_lookups = ISC_FALSE;
}
} else if (strncasecmp(opt, "domain=", 7) == 0) {
strlcpy(domainopt, &opt[7], sizeof(domainopt));
set_search_domain(domainopt);
@@ -671,6 +747,9 @@ addlookup(char *opt) {
char store[MXNAME];
debug("addlookup()");
a_noanswer = ISC_FALSE;
tr.base = deftype;
tr.length = strlen(deftype);
result = dns_rdatatype_fromtext(&rdtype, &tr);

5
bin/tests/system/nslookup/ns1/named.conf
View File

@@ -23,3 +23,8 @@ zone "example" {
type master;
file "example.db";
};
zone "example.net" {
type master;
file "example.net.db";
};

80
bin/tests/system/nslookup/tests.sh
View File

@@ -23,5 +23,85 @@ grep "origin = ns1.example" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo "Check A only lookup"
ret=0
$NSLOOKUP -port=5300 a-only.example.net 10.53.0.1 > nslookup.out${n} || ret=1
lines=`grep "Server:" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep a-only.example.net nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
grep "1.2.3.4" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo "Check AAAA only lookup"
ret=0
$NSLOOKUP -port=5300 aaaa-only.example.net 10.53.0.1 > nslookup.out${n} || ret=1
lines=`grep "Server:" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep aaaa-only.example.net nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
grep "2001::ffff" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo "Check dual A + AAAA lookup"
ret=0
$NSLOOKUP -port=5300 dual.example.net 10.53.0.1 > nslookup.out${n} || ret=1
lines=`grep "Server:" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep dual.example.net nslookup.out${n} | wc -l`
test $lines = 2 || ret=1
grep "1.2.3.4" nslookup.out${n} > /dev/null || ret=1
grep "2001::ffff" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo "Check CNAME to A only lookup"
ret=0
$NSLOOKUP -port=5300 cname-a-only.example.net 10.53.0.1 > nslookup.out${n} || ret=1
lines=`grep "Server:" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep "canonical name" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep a-only.example.net nslookup.out${n} | grep -v "canonical name" | wc -l`
test $lines = 1 || ret=1
grep "1.2.3.4" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo "Check CNAME to AAAA only lookup"
ret=0
$NSLOOKUP -port=5300 cname-aaaa-only.example.net 10.53.0.1 > nslookup.out${n} || ret=1
lines=`grep "Server:" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep "canonical name" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep aaaa-only.example.net nslookup.out${n} | grep -v "canonical name" |wc -l`
test $lines = 1 || ret=1
grep "2001::ffff" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
echo "Check CNAME to dual A + AAAA lookup"
ret=0
$NSLOOKUP -port=5300 cname-dual.example.net 10.53.0.1 > nslookup.out${n} || ret=1
lines=`grep "Server:" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep "canonical name" nslookup.out${n} | wc -l`
test $lines = 1 || ret=1
lines=`grep dual.example.net nslookup.out${n} | grep -v "canonical name" | wc -l`
test $lines = 2 || ret=1
grep "1.2.3.4" nslookup.out${n} > /dev/null || ret=1
grep "2001::ffff" nslookup.out${n} > /dev/null || ret=1
if [ $ret != 0 ]; then echo "I:failed"; fi
status=`expr $status + $ret`
echo "I:exit status: $status"
[ $status -eq 0 ] || exit 1