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resolve: always align flags to 8th column and print CAA flags

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Left-over unknown flags are printed numerically. Otherwise,
it wouldn't be known what bits are remaining without knowning
what the known bits are.

A test case is added to verify the flag printing code:
============== src/resolve/test-data/fake-caa.pkts ==============
google.com. IN CAA   0 issue "symantec.com"
google.com. IN CAA   128 issue "symantec.com"
        -- Flags: critical
google.com. IN CAA   129 issue "symantec.com"
        -- Flags: critical 1
google.com. IN CAA   22 issue "symantec.com"
        -- Flags: 22
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2016-02-01 21:35:44 -05:00
parent 95052df376
commit 718af59e9a
4 changed files with 21 additions and 16 deletions
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3
Makefile.am
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@ -5326,7 +5326,8 @@ EXTRA_DIST += \
src/resolve/test-data/teamits.com.pkts \
src/resolve/test-data/zbyszek@fedoraproject.org.pkts \
src/resolve/test-data/_443._tcp.fedoraproject.org.pkts \
src/resolve/test-data/kyhwana.org.pkts
src/resolve/test-data/kyhwana.org.pkts \
src/resolve/test-data/fake-caa.pkts
test_dnssec_SOURCES = \
src/resolve/test-dnssec.c \

3
src/resolve/dns-type.h
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@ -154,3 +154,6 @@ const char *tlsa_selector_to_string(uint8_t selector);
/* https://tools.ietf.org/html/draft-ietf-dane-protocol-23#section-7.4 */
const char *tlsa_matching_type_to_string(uint8_t selector);
/* https://tools.ietf.org/html/rfc6844#section-5.1 */
#define CAA_FLAG_CRITICAL (1u << 7)

31
src/resolve/resolved-dns-rr.c
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@ -980,7 +980,7 @@ const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
case DNS_TYPE_DNSKEY: {
_cleanup_free_ char *alg = NULL;
char *ss;
int n, n1;
int n;
uint16_t key_tag;
key_tag = dnssec_keytag(rr, true);
@ -989,9 +989,8 @@ const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
if (r < 0)
return NULL;
r = asprintf(&s, "%s %n%u %u %s %n",
r = asprintf(&s, "%s %u %u %s %n",
k,
&n1,
rr->dnskey.flags,
rr->dnskey.protocol,
alg,
@ -1006,14 +1005,12 @@ const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
return NULL;
r = asprintf(&ss, "%s\n"
"%*s-- Flags:%s%s%s\n"
"%*s-- Key tag: %u",
" -- Flags:%s%s%s\n"
" -- Key tag: %u",
s,
n1, "",
rr->dnskey.flags & DNSKEY_FLAG_SEP ? " SEP" : "",
rr->dnskey.flags & DNSKEY_FLAG_REVOKE ? " REVOKE" : "",
rr->dnskey.flags & DNSKEY_FLAG_ZONE_KEY ? " ZONE_KEY" : "",
n1, "",
key_tag);
if (r < 0)
return NULL;
@ -1139,13 +1136,13 @@ const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
return NULL;
r = asprintf(&ss, "%s\n"
"%*s-- Cert. usage: %s\n"
"%*s-- Selector: %s\n"
"%*s-- Matching type: %s",
" -- Cert. usage: %s\n"
" -- Selector: %s\n"
" -- Matching type: %s",
s,
n - 6, "", cert_usage,
n - 6, "", selector,
n - 6, "", matching_type);
cert_usage,
selector,
matching_type);
if (r < 0)
return NULL;
free(s);
@ -1161,11 +1158,15 @@ const char *dns_resource_record_to_string(DnsResourceRecord *rr) {
if (!value)
return NULL;
r = asprintf(&s, "%s %u %s \"%s\"",
r = asprintf(&s, "%s %u %s \"%s\"%s%s%s%.0u",
k,
rr->caa.flags,
rr->caa.tag,
value);
value,
rr->caa.flags ? "\n -- Flags:" : "",
rr->caa.flags & CAA_FLAG_CRITICAL ? " critical" : "",
rr->caa.flags & ~CAA_FLAG_CRITICAL ? " " : "",
rr->caa.flags & ~CAA_FLAG_CRITICAL);
if (r < 0)
return NULL;

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src/resolve/test-data/fake-caa.pkts Normal file
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