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Code Issues Releases Wiki Activity

Add support for displaying EDNS option LLQ.

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This commit is contained in:
Mark Andrews
2019-08-27 13:49:15 +10:00
parent c8ed70a108
commit d98f446d3f
6 changed files with 79 additions and 2 deletions
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2
CHANGES
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@@ -1,3 +1,5 @@
5280. [protocol] Add support for displaying EDNS option LLQ. [GL #1201]
5279. [bug] When loading, reject zones containing CDS or CDNSKEY
RRsets at the zone apex if they would cause DNSSEC
validation failures if published in the parent zone

1
bin/dig/dighost.c
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@@ -1383,6 +1383,7 @@ typedef struct dig_ednsoptname {
} dig_ednsoptname_t;
dig_ednsoptname_t optnames[] = {
{ 1, "LLQ" }, /* draft-sekar-dns-llq */
{ 3, "NSID" }, /* RFC 5001 */
{ 5, "DAU" }, /* RFC 6975 */
{ 6, "DHU" }, /* RFC 6975 */

8
bin/tests/system/digdelv/tests.sh
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@@ -519,6 +519,14 @@ if [ -x "$DIG" ] ; then
if [ $ret -ne 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "checking ednsopt LLQ prints as expected ($n)"
ret=0
dig_with_opts @10.53.0.3 +ednsopt=llq:0001000200001234567812345678fefefefe +qr a.example > dig.out.test$n 2>&1 || ret=1
grep 'LLQ: Version: 1, Opcode: 2, Error: 0, Identifier: 1311768465173141112, Lifetime: 4278124286$' dig.out.test$n > /dev/null || ret=1
if [ $ret -ne 0 ]; then echo_i "failed"; fi
status=$((status+ret))
n=$((n+1))
echo_i "checking that dig warns about .local queries ($n)"
ret=0

1
lib/dns/include/dns/message.h
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@@ -99,6 +99,7 @@
#define DNS_MESSAGEEXTFLAG_DO 0x8000U
/*%< EDNS0 extended OPT codes */
#define DNS_OPT_LLQ 1 /*%< LLQ opt code */
#define DNS_OPT_NSID 3 /*%< NSID opt code */
#define DNS_OPT_CLIENT_SUBNET 8 /*%< client subnet opt code */
#define DNS_OPT_EXPIRE 9 /*%< EXPIRE opt code */

63
lib/dns/message.c
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@@ -3427,6 +3427,42 @@ render_ecs(isc_buffer_t *ecsbuf, isc_buffer_t *target) {
return (result);
}
static isc_result_t
render_llq(isc_buffer_t *optbuf, isc_buffer_t *target) {
char buf[sizeof("18446744073709551615")]; /* 2^64-1 */
isc_result_t result = ISC_R_SUCCESS;
uint32_t u;
uint64_t q;
u = isc_buffer_getuint16(optbuf);
ADD_STRING(target, " Version: ");
snprintf(buf, sizeof(buf), "%u", u);
ADD_STRING(target, buf);
u = isc_buffer_getuint16(optbuf);
ADD_STRING(target, ", Opcode: ");
snprintf(buf, sizeof(buf), "%u", u);
ADD_STRING(target, buf);
u = isc_buffer_getuint16(optbuf);
ADD_STRING(target, ", Error: ");
snprintf(buf, sizeof(buf), "%u", u);
ADD_STRING(target, buf);
q = isc_buffer_getuint32(optbuf);
q <<= 32;
q |= isc_buffer_getuint32(optbuf);
ADD_STRING(target, ", Identifier: ");
snprintf(buf, sizeof(buf), "%" PRIu64, q);
ADD_STRING(target, buf);
u = isc_buffer_getuint32(optbuf);
ADD_STRING(target, ", Lifetime: ");
snprintf(buf, sizeof(buf), "%u", u);
ADD_STRING(target, buf);
cleanup:
return (result);
}
static isc_result_t
dns_message_pseudosectiontoyaml(dns_message_t *msg,
@@ -3513,7 +3549,19 @@ dns_message_pseudosectiontoyaml(dns_message_t *msg,
optlen = isc_buffer_getuint16(&optbuf);
INSIST(isc_buffer_remaininglength(&optbuf) >= optlen);
if (optcode == DNS_OPT_NSID) {
if (optcode == DNS_OPT_LLQ) {
INDENT(style);
if (optlen == 18U) {
ADD_STRING(target, "LLQ: ");
result = render_llq(&optbuf, target);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
ADD_STRING(target, "\n");
continue;
}
ADD_STRING(target, "LLQ");
} else if (optcode == DNS_OPT_NSID) {
INDENT(style);
ADD_STRING(target, "NSID");
} else if (optcode == DNS_OPT_COOKIE) {
@@ -3795,7 +3843,18 @@ dns_message_pseudosectiontotext(dns_message_t *msg,
INDENT(style);
if (optcode == DNS_OPT_NSID) {
if (optcode == DNS_OPT_LLQ) {
if (optlen == 18U) {
ADD_STRING(target, "; LLQ:");
result = render_llq(&optbuf, target);
if (result != ISC_R_SUCCESS) {
return (result);
}
ADD_STRING(target, "\n");
continue;
}
ADD_STRING(target, "; LLQ");
} else if (optcode == DNS_OPT_NSID) {
ADD_STRING(target, "; NSID");
} else if (optcode == DNS_OPT_COOKIE) {
ADD_STRING(target, "; COOKIE");

6
lib/dns/rdata/generic/opt_41.c
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@@ -116,6 +116,12 @@ fromwire_opt(ARGS_FROMWIRE) {
return (ISC_R_UNEXPECTEDEND);
}
switch (opt) {
case DNS_OPT_LLQ:
if (length != 18U) {
return (DNS_R_OPTERR);
}
isc_region_consume(&sregion, length);
break;
case DNS_OPT_CLIENT_SUBNET: {
uint16_t family;
uint8_t addrlen;