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resolved: add dns_resource_key_from_json() helper

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It reverse what dns_resource_key_to_json(), i.e. turns JSON data into a
parsed DnsResourceKey object.

Ultimately this just moves a client-side local wrapper into generic
code. Nothing truly new here.
This commit is contained in:
Lennart Poettering 2023-06-12 16:44:40 +02:00
parent e0930aa6ff
commit ce74fb0905
3 changed files with 30 additions and 29 deletions
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30
src/resolve/resolvectl.c
View File

@ -2586,34 +2586,6 @@ static int verb_log_level(int argc, char *argv[], void *userdata) {
return verb_log_control_common(bus, "org.freedesktop.resolve1", argv[0], argc == 2 ? argv[1] : NULL);
}
static int monitor_rkey_from_json(JsonVariant *v, DnsResourceKey **ret_key) {
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
uint16_t type = 0, class = 0;
const char *name = NULL;
int r;
JsonDispatch dispatch_table[] = {
{ "class", JSON_VARIANT_INTEGER, json_dispatch_uint16, PTR_TO_SIZE(&class), JSON_MANDATORY },
{ "type", JSON_VARIANT_INTEGER, json_dispatch_uint16, PTR_TO_SIZE(&type), JSON_MANDATORY },
{ "name", JSON_VARIANT_STRING, json_dispatch_const_string, PTR_TO_SIZE(&name), JSON_MANDATORY },
{}
};
assert(v);
assert(ret_key);
r = json_dispatch(v, dispatch_table, NULL, 0, NULL);
if (r < 0)
return r;
key = dns_resource_key_new(class, type, name);
if (!key)
return -ENOMEM;
*ret_key = TAKE_PTR(key);
return 0;
}
static int print_question(char prefix, const char *color, JsonVariant *question) {
JsonVariant *q = NULL;
int r;
@ -2624,7 +2596,7 @@ static int print_question(char prefix, const char *color, JsonVariant *question)
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
char buf[DNS_RESOURCE_KEY_STRING_MAX];
r = monitor_rkey_from_json(q, &key);
r = dns_resource_key_from_json(q, &key);
if (r < 0) {
log_warning_errno(r, "Received monitor message with invalid question key, ignoring: %m");
continue;

28
src/resolve/resolved-dns-rr.c
View File

@ -1853,6 +1853,34 @@ int dns_resource_key_to_json(DnsResourceKey *key, JsonVariant **ret) {
JSON_BUILD_PAIR("name", JSON_BUILD_STRING(dns_resource_key_name(key)))));
}
int dns_resource_key_from_json(JsonVariant *v, DnsResourceKey **ret) {
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
uint16_t type = 0, class = 0;
const char *name = NULL;
int r;
JsonDispatch dispatch_table[] = {
{ "class", JSON_VARIANT_INTEGER, json_dispatch_uint16, PTR_TO_SIZE(&class), JSON_MANDATORY },
{ "type", JSON_VARIANT_INTEGER, json_dispatch_uint16, PTR_TO_SIZE(&type), JSON_MANDATORY },
{ "name", JSON_VARIANT_STRING, json_dispatch_const_string, PTR_TO_SIZE(&name), JSON_MANDATORY },
{}
};
assert(v);
assert(ret);
r = json_dispatch(v, dispatch_table, NULL, 0, NULL);
if (r < 0)
return r;
key = dns_resource_key_new(class, type, name);
if (!key)
return -ENOMEM;
*ret = TAKE_PTR(key);
return 0;
}
static int type_bitmap_to_json(Bitmap *b, JsonVariant **ret) {
_cleanup_(json_variant_unrefp) JsonVariant *l = NULL;
unsigned t;

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

@ -368,6 +368,7 @@ int dns_txt_item_new_empty(DnsTxtItem **ret);
int dns_resource_record_new_from_raw(DnsResourceRecord **ret, const void *data, size_t size);
int dns_resource_key_to_json(DnsResourceKey *key, JsonVariant **ret);
int dns_resource_key_from_json(JsonVariant *v, DnsResourceKey **ret);
int dns_resource_record_to_json(DnsResourceRecord *rr, JsonVariant **ret);
void dns_resource_record_hash_func(const DnsResourceRecord *i, struct siphash *state);