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resolved: rr - introduce dns_resource_key_new_redirect()

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Takes a key and CNAME RR and returns the canonical RR of the right
type. Make use of this in dns_question_redirect().
This commit is contained in:
Tom Gundersen 2015-09-04 01:56:23 +02:00
parent 7c1ff6ac3d
commit 36d9205d66
7 changed files with 17 additions and 9 deletions
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2
src/resolve/resolved-bus.c
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@ -191,7 +191,7 @@ static void bus_method_resolve_hostname_complete(DnsQuery *q) {
/* This has a cname? Then update the query with the
* new cname. */
r = dns_query_cname_redirect(q, cname->cname.name);
r = dns_query_cname_redirect(q, cname);
if (r < 0) {
if (r == -ELOOP)
r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_CNAME_LOOP, "CNAME loop on '%s'", q->request_hostname);

4
src/resolve/resolved-dns-query.c
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@ -831,7 +831,7 @@ void dns_query_ready(DnsQuery *q) {
dns_query_complete(q, state);
}
int dns_query_cname_redirect(DnsQuery *q, const char *name) {
int dns_query_cname_redirect(DnsQuery *q, const DnsResourceRecord *cname) {
_cleanup_(dns_question_unrefp) DnsQuestion *nq = NULL;
int r;
@ -840,7 +840,7 @@ int dns_query_cname_redirect(DnsQuery *q, const char *name) {
if (q->n_cname_redirects > CNAME_MAX)
return -ELOOP;
r = dns_question_cname_redirect(q->question, name, &nq);
r = dns_question_cname_redirect(q->question, cname, &nq);
if (r < 0)
return r;

2
src/resolve/resolved-dns-query.h
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@ -72,7 +72,7 @@ DnsQuery *dns_query_free(DnsQuery *q);
int dns_query_go(DnsQuery *q);
void dns_query_ready(DnsQuery *q);
int dns_query_cname_redirect(DnsQuery *q, const char *name);
int dns_query_cname_redirect(DnsQuery *q, const DnsResourceRecord *cname);
int dns_query_bus_track(DnsQuery *q, sd_bus_message *m);

8
src/resolve/resolved-dns-question.c
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@ -242,13 +242,13 @@ int dns_question_is_equal(DnsQuestion *a, DnsQuestion *b) {
return 1;
}
int dns_question_cname_redirect(DnsQuestion *q, const char *name, DnsQuestion **ret) {
int dns_question_cname_redirect(DnsQuestion *q, const DnsResourceRecord *cname, DnsQuestion **ret) {
_cleanup_(dns_question_unrefp) DnsQuestion *n = NULL;
bool same = true;
unsigned i;
int r;
assert(name);
assert(cname);
assert(ret);
if (!q) {
@ -262,7 +262,7 @@ int dns_question_cname_redirect(DnsQuestion *q, const char *name, DnsQuestion **
}
for (i = 0; i < q->n_keys; i++) {
r = dns_name_equal(DNS_RESOURCE_KEY_NAME(q->keys[i]), name);
r = dns_name_equal(DNS_RESOURCE_KEY_NAME(q->keys[i]), cname->cname.name);
if (r < 0)
return r;
@ -286,7 +286,7 @@ int dns_question_cname_redirect(DnsQuestion *q, const char *name, DnsQuestion **
for (i = 0; i < q->n_keys; i++) {
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *k = NULL;
k = dns_resource_key_new(q->keys[i]->class, q->keys[i]->type, name);
k = dns_resource_key_new_redirect(q->keys[i], cname);
if (!k)
return -ENOMEM;

2
src/resolve/resolved-dns-question.h
View File

@ -46,6 +46,6 @@ int dns_question_is_superset(DnsQuestion *q, DnsQuestion *other);
int dns_question_contains(DnsQuestion *a, DnsResourceKey *k);
int dns_question_is_equal(DnsQuestion *a, DnsQuestion *b);
int dns_question_cname_redirect(DnsQuestion *q, const char *name, DnsQuestion **ret);
int dns_question_cname_redirect(DnsQuestion *q, const DnsResourceRecord *cname, DnsQuestion **ret);
DEFINE_TRIVIAL_CLEANUP_FUNC(DnsQuestion*, dns_question_unref);

7
src/resolve/resolved-dns-rr.c
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@ -54,6 +54,13 @@ DnsResourceKey* dns_resource_key_new_cname(const DnsResourceKey *key) {
return dns_resource_key_new(key->class, DNS_TYPE_CNAME, DNS_RESOURCE_KEY_NAME(key));
}
DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname) {
assert(key);
assert(cname);
return dns_resource_key_new(key->class, key->type, cname->cname.name);
}
DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name) {
DnsResourceKey *k;

1
src/resolve/resolved-dns-rr.h
View File

@ -178,6 +178,7 @@ static inline const char* DNS_RESOURCE_KEY_NAME(const DnsResourceKey *key) {
DnsResourceKey* dns_resource_key_new(uint16_t class, uint16_t type, const char *name);
DnsResourceKey* dns_resource_key_new_cname(const DnsResourceKey *key);
DnsResourceKey* dns_resource_key_new_redirect(const DnsResourceKey *key, const DnsResourceRecord *cname);
DnsResourceKey* dns_resource_key_new_consume(uint16_t class, uint16_t type, char *name);
DnsResourceKey* dns_resource_key_ref(DnsResourceKey *key);
DnsResourceKey* dns_resource_key_unref(DnsResourceKey *key);