#include "resolved.h"
#include "resolved-dns-domain.h"
-static void bus_method_resolve_hostname_complete(DnsQuery *q) {
+static int reply_query_state(DnsQuery *q) {
+ _cleanup_free_ char *ip = NULL;
+ const char *name;
int r;
- assert(q);
+ if (q->request_hostname)
+ name = q->request_hostname;
+ else {
+ r = in_addr_to_string(q->request_family, &q->request_address, &ip);
+ if (r < 0)
+ return r;
- switch(q->state) {
+ name = ip;
+ }
+
+ switch (q->state) {
- case DNS_QUERY_SKIPPED:
- r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "Not appropriate name servers or networks found");
- break;
+ case DNS_QUERY_NO_SERVERS:
+ return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found");
case DNS_QUERY_TIMEOUT:
- r = sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out");
- break;
+ return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out");
case DNS_QUERY_ATTEMPTS_MAX:
- r = sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed");
- break;
+ return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed");
+
+ case DNS_QUERY_RESOURCES:
+ return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_RESOURCES, "Not enough resources");
+
+ case DNS_QUERY_INVALID_REPLY:
+ return sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
case DNS_QUERY_FAILURE: {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- if (q->rcode == DNS_RCODE_NXDOMAIN)
- sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "Hostname %s does not exist", q->request_hostname);
+ assert(q->received);
+
+ if (DNS_PACKET_RCODE(q->received) == DNS_RCODE_NXDOMAIN)
+ sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", name);
else {
const char *rc, *n;
- char p[DECIMAL_STR_MAX(q->rcode)];
+ char p[3]; /* the rcode is 4 bits long */
- rc = dns_rcode_to_string(q->rcode);
+ rc = dns_rcode_to_string(DNS_PACKET_RCODE(q->received));
if (!rc) {
- sprintf(p, "%i", q->rcode);
+ sprintf(p, "%i", DNS_PACKET_RCODE(q->received));
rc = p;
}
n = strappenda(_BUS_ERROR_DNS, rc);
-
- sd_bus_error_setf(&error, n, "Could not resolve hostname %s, server or network returned error %s", q->request_hostname, rc);
+ sd_bus_error_setf(&error, n, "Could not resolve '%s', server or network returned error %s", name, rc);
}
- r = sd_bus_reply_method_error(q->request, &error);
- break;
+ return sd_bus_reply_method_error(q->request, &error);
}
- case DNS_QUERY_SUCCESS: {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- unsigned i, n, added = 0;
+ case DNS_QUERY_NULL:
+ case DNS_QUERY_PENDING:
+ case DNS_QUERY_SUCCESS:
+ default:
+ assert_not_reached("Impossible state");
+ }
+}
- assert(q->packet);
+static int append_address(sd_bus_message *reply, DnsResourceRecord *rr, int ifindex) {
+ int r;
- r = dns_packet_skip_question(q->packet);
- if (r < 0)
- goto parse_fail;
+ assert(reply);
+ assert(rr);
- r = sd_bus_message_new_method_return(q->request, &reply);
+ r = sd_bus_message_open_container(reply, 'r', "yayi");
+ if (r < 0)
+ return r;
+
+ if (rr->key.type == DNS_TYPE_A) {
+ r = sd_bus_message_append(reply, "y", AF_INET);
if (r < 0)
- goto finish;
+ return r;
- r = sd_bus_message_open_container(reply, 'a', "(yayi)");
+ r = sd_bus_message_append_array(reply, 'y', &rr->a.in_addr, sizeof(struct in_addr));
+ } else {
+ r = sd_bus_message_append(reply, "y", AF_INET6);
if (r < 0)
- goto finish;
+ return r;
- n = be16toh(DNS_PACKET_HEADER(q->packet)->ancount) +
- be16toh(DNS_PACKET_HEADER(q->packet)->nscount) +
- be16toh(DNS_PACKET_HEADER(q->packet)->arcount);
+ r = sd_bus_message_append_array(reply, 'y', &rr->aaaa.in6_addr, sizeof(struct in6_addr));
+ }
+ if (r < 0)
+ return r;
- for (i = 0; i < n; i++) {
- _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
+ r = sd_bus_message_append(reply, "i", ifindex);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ return r;
- r = dns_packet_read_rr(q->packet, &rr, NULL);
+ return 0;
+}
+
+static void bus_method_resolve_hostname_complete(DnsQuery *q) {
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *cname = NULL, *canonical = NULL;
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ unsigned i, n, added = 0;
+ size_t answer_rindex;
+ int r;
+
+ assert(q);
+
+ if (q->state != DNS_QUERY_SUCCESS) {
+ r = reply_query_state(q);
+ goto finish;
+ }
+
+ assert(q->received);
+
+ r = dns_packet_skip_question(q->received);
+ if (r < 0)
+ goto parse_fail;
+
+ answer_rindex = q->received->rindex;
+
+ r = sd_bus_message_new_method_return(q->request, &reply);
+ if (r < 0)
+ goto finish;
+
+ r = sd_bus_message_open_container(reply, 'a', "(yayi)");
+ if (r < 0)
+ goto finish;
+
+ n = DNS_PACKET_ANCOUNT(q->received) +
+ DNS_PACKET_NSCOUNT(q->received) +
+ DNS_PACKET_ARCOUNT(q->received);
+
+ for (i = 0; i < n; i++) {
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
+
+ r = dns_packet_read_rr(q->received, &rr, NULL);
+ if (r < 0)
+ goto parse_fail;
+
+ r = dns_query_matches_rr(q, rr);
+ if (r < 0)
+ goto parse_fail;
+ if (r == 0) {
+ /* Hmm, if this is not an address record,
+ maybe it's a cname? If so, remember this */
+ r = dns_query_matches_cname(q, rr);
if (r < 0)
goto parse_fail;
+ if (r > 0)
+ cname = dns_resource_record_ref(rr);
- if (rr->key.class != DNS_CLASS_IN)
- continue;
+ continue;
+ }
- if (!(q->request_family != AF_INET6 && rr->key.type == DNS_TYPE_A) &&
- !(q->request_family != AF_INET && rr->key.type == DNS_TYPE_AAAA))
- continue;
+ r = append_address(reply, rr, q->received->ifindex);
+ if (r < 0)
+ goto finish;
- if (!dns_name_equal(rr->key.name, q->request_hostname))
- continue;
+ if (!canonical)
+ canonical = dns_resource_record_ref(rr);
- r = sd_bus_message_open_container(reply, 'r', "yayi");
- if (r < 0)
- goto finish;
+ added ++;
+ }
- if (rr->key.type == DNS_TYPE_A) {
- r = sd_bus_message_append(reply, "y", AF_INET);
- if (r < 0)
- goto finish;
+ if (added <= 0) {
+ if (!cname) {
+ r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of requested type", q->request_hostname);
+ goto finish;
+ }
- r = sd_bus_message_append_array(reply, 'y', &rr->a.in_addr, sizeof(struct in_addr));
- } else {
- r = sd_bus_message_append(reply, "y", AF_INET6);
- if (r < 0)
- goto finish;
+ /* This has a cname? Then update the query with the
+ * new cname. */
+ r = dns_query_follow_cname(q, cname->cname.name);
+ 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);
+ else
+ r = sd_bus_reply_method_errno(q->request, -r, NULL);
- r = sd_bus_message_append_array(reply, 'y', &rr->aaaa.in6_addr, sizeof(struct in6_addr));
- }
+ goto finish;
+ }
+
+ /* Before we restart the query, let's see if any of
+ * the RRs we already got already answers our query */
+ dns_packet_rewind(q->received, answer_rindex);
+ for (i = 0; i < n; i++) {
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
+
+ r = dns_packet_read_rr(q->received, &rr, NULL);
if (r < 0)
- goto finish;
+ goto parse_fail;
- r = sd_bus_message_append(reply, "i", q->packet->ifindex);
+ r = dns_query_matches_rr(q, rr);
if (r < 0)
- goto finish;
+ goto parse_fail;
+ if (r == 0)
+ continue;
- r = sd_bus_message_close_container(reply);
+ r = append_address(reply, rr, q->received->ifindex);
if (r < 0)
goto finish;
- added ++;
+ if (!canonical)
+ canonical = dns_resource_record_ref(rr);
+
+ added++;
}
- if (added <= 0)
- goto parse_fail;
+ /* If we didn't find anything, then let's restart the
+ * query, this time with the cname */
+ if (added <= 0) {
+ r = dns_query_start(q);
+ if (r == -ESRCH) {
+ r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found");
+ goto finish;
+ }
+ if (r < 0) {
+ r = sd_bus_reply_method_errno(q->request, -r, NULL);
+ goto finish;
+ }
+ return;
+ }
+ }
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- goto finish;
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ goto finish;
- r = sd_bus_send(q->manager->bus, reply, NULL);
- break;
- }
+ /* Return the precise spelling and uppercasing reported by the server */
+ assert(canonical);
+ r = sd_bus_message_append(reply, "s", canonical->key.name);
+ if (r < 0)
+ goto finish;
- parse_fail:
- case DNS_QUERY_INVALID_REPLY:
- r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
- break;
+ r = sd_bus_send(q->manager->bus, reply, NULL);
+ goto finish;
- case DNS_QUERY_NULL:
- case DNS_QUERY_SENT:
- assert_not_reached("Unexpected query state");
- }
+parse_fail:
+ r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
finish:
if (r < 0)
r = dns_query_start(q);
if (r < 0) {
dns_query_free(q);
+
+ if (r == -ESRCH)
+ sd_bus_error_setf(error, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found");
+
return r;
}
}
static void bus_method_resolve_address_complete(DnsQuery *q) {
- _cleanup_free_ char *ip = NULL;
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ unsigned i, n, added = 0;
int r;
assert(q);
- in_addr_to_string(q->request_family, &q->request_address, &ip);
-
- switch(q->state) {
-
- case DNS_QUERY_SKIPPED:
- r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_NAME_SERVERS, "Not appropriate name servers or networks found");
- break;
-
- case DNS_QUERY_TIMEOUT:
- r = sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out");
- break;
-
- case DNS_QUERY_ATTEMPTS_MAX:
- r = sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed");
- break;
-
- case DNS_QUERY_FAILURE: {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- if (q->rcode == DNS_RCODE_NXDOMAIN)
- sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "No hostname known for address %s ", ip);
- else {
- const char *rc, *n;
- char p[DECIMAL_STR_MAX(q->rcode)];
-
- rc = dns_rcode_to_string(q->rcode);
- if (!rc) {
- sprintf(p, "%i", q->rcode);
- rc = p;
- }
+ if (q->state != DNS_QUERY_SUCCESS) {
+ r = reply_query_state(q);
+ goto finish;
+ }
- n = strappenda(_BUS_ERROR_DNS, rc);
+ assert(q->received);
- sd_bus_error_setf(&error, n, "Could not resolve address %s, server or network returned error %s", ip, rc);
- }
+ r = dns_packet_skip_question(q->received);
+ if (r < 0)
+ goto parse_fail;
- r = sd_bus_reply_method_error(q->request, &error);
- break;
- }
+ r = sd_bus_message_new_method_return(q->request, &reply);
+ if (r < 0)
+ goto finish;
- case DNS_QUERY_SUCCESS: {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- unsigned i, n, added = 0;
- _cleanup_free_ char *reverse = NULL;
+ r = sd_bus_message_open_container(reply, 'a', "s");
+ if (r < 0)
+ goto finish;
- assert(q->packet);
+ n = DNS_PACKET_ANCOUNT(q->received) +
+ DNS_PACKET_NSCOUNT(q->received) +
+ DNS_PACKET_ARCOUNT(q->received);
- r = dns_name_reverse(q->request_family, &q->request_address, &reverse);
- if (r < 0)
- goto finish;
+ for (i = 0; i < n; i++) {
+ _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
- r = dns_packet_skip_question(q->packet);
+ r = dns_packet_read_rr(q->received, &rr, NULL);
if (r < 0)
goto parse_fail;
- r = sd_bus_message_new_method_return(q->request, &reply);
+ r = dns_query_matches_rr(q, rr);
if (r < 0)
- goto finish;
+ goto parse_fail;
+ if (r == 0)
+ continue;
- r = sd_bus_message_open_container(reply, 'a', "s");
+ r = sd_bus_message_append(reply, "s", rr->ptr.name);
if (r < 0)
goto finish;
- n = be16toh(DNS_PACKET_HEADER(q->packet)->ancount) +
- be16toh(DNS_PACKET_HEADER(q->packet)->nscount) +
- be16toh(DNS_PACKET_HEADER(q->packet)->arcount);
-
- for (i = 0; i < n; i++) {
- _cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
-
- r = dns_packet_read_rr(q->packet, &rr, NULL);
- if (r < 0)
- goto parse_fail;
-
- if (rr->key.class != DNS_CLASS_IN)
- continue;
- if (rr->key.type != DNS_TYPE_PTR)
- continue;
- if (!dns_name_equal(rr->key.name, reverse))
- continue;
-
- r = sd_bus_message_append(reply, "s", rr->ptr.name);
- if (r < 0)
- goto finish;
-
- added ++;
- }
+ added ++;
+ }
- if (added <= 0)
- goto parse_fail;
+ if (added <= 0) {
+ _cleanup_free_ char *ip = NULL;
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- goto finish;
+ in_addr_to_string(q->request_family, &q->request_address, &ip);
- r = sd_bus_send(q->manager->bus, reply, NULL);
- break;
+ r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "Address '%s' does not have any RR of requested type", ip);
+ goto finish;
}
- parse_fail:
- case DNS_QUERY_INVALID_REPLY:
- r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
- break;
+ r = sd_bus_message_close_container(reply);
+ if (r < 0)
+ goto finish;
- case DNS_QUERY_NULL:
- case DNS_QUERY_SENT:
- assert_not_reached("Unexpected query state");
- }
+ r = sd_bus_send(q->manager->bus, reply, NULL);
+ goto finish;
+
+parse_fail:
+ r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
finish:
if (r < 0)
static const sd_bus_vtable resolve_vtable[] = {
SD_BUS_VTABLE_START(0),
- SD_BUS_METHOD("ResolveHostname", "sy", "a(yayi)", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_METHOD("ResolveHostname", "sy", "a(yayi)s", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_METHOD("ResolveAddress", "yayi", "as", bus_method_resolve_address, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_VTABLE_END,
};
return 0;
}
- r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/resolve1", "org.freedesktop.resolve1", resolve_vtable, m);
+ r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/resolve1", "org.freedesktop.resolve1.Manager", resolve_vtable, m);
if (r < 0) {
log_error("Failed to register object: %s", strerror(-r));
return r;
~ianmdlvl / elogind.git / blobdiff