+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2014 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include "bus-common-errors.h"
-#include "bus-util.h"
-
-#include "resolved-dns-domain.h"
-#include "resolved-bus.h"
-#include "resolved-def.h"
-
-static int reply_query_state(DnsQuery *q) {
- _cleanup_free_ char *ip = NULL;
- const char *name;
- int r;
-
- 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;
-
- name = ip;
- }
-
- switch (q->state) {
-
- case DNS_TRANSACTION_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_TRANSACTION_TIMEOUT:
- return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "Query timed out");
-
- case DNS_TRANSACTION_ATTEMPTS_MAX_REACHED:
- return sd_bus_reply_method_errorf(q->request, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed");
-
- case DNS_TRANSACTION_INVALID_REPLY:
- return sd_bus_reply_method_errorf(q->request, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
-
- case DNS_TRANSACTION_RESOURCES:
- return sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_RESOURCES, "Not enough resources");
-
- case DNS_TRANSACTION_ABORTED:
- return sd_bus_reply_method_errorf(q->request, BUS_ERROR_ABORTED, "Query aborted");
-
- case DNS_TRANSACTION_FAILURE: {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-
- if (q->answer_rcode == DNS_RCODE_NXDOMAIN)
- sd_bus_error_setf(&error, _BUS_ERROR_DNS "NXDOMAIN", "'%s' not found", name);
- else {
- const char *rc, *n;
- char p[3]; /* the rcode is 4 bits long */
-
- rc = dns_rcode_to_string(q->answer_rcode);
- if (!rc) {
- sprintf(p, "%i", q->answer_rcode);
- rc = p;
- }
-
- n = strjoina(_BUS_ERROR_DNS, rc);
- sd_bus_error_setf(&error, n, "Could not resolve '%s', server or network returned error %s", name, rc);
- }
-
- return sd_bus_reply_method_error(q->request, &error);
- }
-
- case DNS_TRANSACTION_NULL:
- case DNS_TRANSACTION_PENDING:
- case DNS_TRANSACTION_SUCCESS:
- default:
- assert_not_reached("Impossible state");
- }
-}
-
-static int append_address(sd_bus_message *reply, DnsResourceRecord *rr) {
- int r;
-
- assert(reply);
- assert(rr);
-
- r = sd_bus_message_open_container(reply, 'r', "iay");
- if (r < 0)
- return r;
-
- if (rr->key->type == DNS_TYPE_A) {
- r = sd_bus_message_append(reply, "i", AF_INET);
- if (r < 0)
- return r;
-
- r = sd_bus_message_append_array(reply, 'y', &rr->a.in_addr, sizeof(struct in_addr));
-
- } else if (rr->key->type == DNS_TYPE_AAAA) {
- r = sd_bus_message_append(reply, "i", AF_INET6);
- if (r < 0)
- return r;
-
- r = sd_bus_message_append_array(reply, 'y', &rr->aaaa.in6_addr, sizeof(struct in6_addr));
- } else
- return -EAFNOSUPPORT;
-
- if (r < 0)
- return r;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- return r;
-
- 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;
- _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
- unsigned added = 0, i;
- int r;
-
- assert(q);
-
- if (q->state != DNS_TRANSACTION_SUCCESS) {
- r = reply_query_state(q);
- goto finish;
- }
-
- r = sd_bus_message_new_method_return(q->request, &reply);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append(reply, "i", q->answer_ifindex);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_open_container(reply, 'a', "(iay)");
- if (r < 0)
- goto finish;
-
- if (q->answer) {
- answer = dns_answer_ref(q->answer);
-
- for (i = 0; i < answer->n_rrs; i++) {
- r = dns_question_matches_rr(q->question, answer->rrs[i]);
- if (r < 0)
- goto finish;
- if (r == 0) {
- /* Hmm, if this is not an address record,
- maybe it's a cname? If so, remember this */
- r = dns_question_matches_cname(q->question, answer->rrs[i]);
- if (r < 0)
- goto finish;
- if (r > 0)
- cname = dns_resource_record_ref(answer->rrs[i]);
-
- continue;
- }
-
- r = append_address(reply, answer->rrs[i]);
- if (r < 0)
- goto finish;
-
- if (!canonical)
- canonical = dns_resource_record_ref(answer->rrs[i]);
-
- added ++;
- }
- }
-
- 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;
- }
-
- /* This has a cname? Then update the query with the
- * new cname. */
- r = dns_query_cname_redirect(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);
-
- goto finish;
- }
-
- /* Before we restart the query, let's see if any of
- * the RRs we already got already answers our query */
- for (i = 0; i < answer->n_rrs; i++) {
- r = dns_question_matches_rr(q->question, answer->rrs[i]);
- if (r < 0)
- goto finish;
- if (r == 0)
- continue;
-
- r = append_address(reply, answer->rrs[i]);
- if (r < 0)
- goto finish;
-
- if (!canonical)
- canonical = dns_resource_record_ref(answer->rrs[i]);
-
- added++;
- }
-
- // what about the cache?
-
- /* If we didn't find anything, then let's restart the
- * query, this time with the cname */
- if (added <= 0) {
- r = dns_query_go(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;
-
- /* Return the precise spelling and uppercasing reported by the server */
- assert(canonical);
- r = sd_bus_message_append(reply, "st", DNS_RESOURCE_KEY_NAME(canonical->key), SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family));
- if (r < 0)
- goto finish;
-
- r = sd_bus_send(q->manager->bus, reply, NULL);
-
-finish:
- if (r < 0) {
- log_error_errno(r, "Failed to send hostname reply: %m");
- sd_bus_reply_method_errno(q->request, -r, NULL);
- }
-
- dns_query_free(q);
-}
-
-static int check_ifindex_flags(int ifindex, uint64_t *flags, sd_bus_error *error) {
- assert(flags);
-
- if (ifindex < 0)
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
-
- if (*flags & ~SD_RESOLVED_FLAGS_ALL)
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter");
-
- if (*flags == 0)
- *flags = SD_RESOLVED_FLAGS_DEFAULT;
-
- return 0;
-}
-
-static int bus_method_resolve_hostname(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
- Manager *m = userdata;
- const char *hostname;
- int family, ifindex;
- uint64_t flags;
- DnsQuery *q;
- int r;
-
- assert(bus);
- assert(message);
- assert(m);
-
- r = sd_bus_message_read(message, "isit", &ifindex, &hostname, &family, &flags);
- if (r < 0)
- return r;
-
- if (!IN_SET(family, AF_INET, AF_INET6, AF_UNSPEC))
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);
-
- r = dns_name_normalize(hostname, NULL);
- if (r < 0)
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", hostname);
-
- r = check_ifindex_flags(ifindex, &flags, error);
- if (r < 0)
- return r;
-
- question = dns_question_new(family == AF_UNSPEC ? 2 : 1);
- if (!question)
- return -ENOMEM;
-
- if (family != AF_INET6) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
-
- key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_A, hostname);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(question, key);
- if (r < 0)
- return r;
- }
-
- if (family != AF_INET) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
-
- key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_AAAA, hostname);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(question, key);
- if (r < 0)
- return r;
- }
-
- r = dns_query_new(m, &q, question, ifindex, flags);
- if (r < 0)
- return r;
-
- q->request = sd_bus_message_ref(message);
- q->request_family = family;
- q->request_hostname = hostname;
- q->complete = bus_method_resolve_hostname_complete;
-
- r = dns_query_bus_track(q, bus, message);
- if (r < 0)
- return r;
-
- r = dns_query_go(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;
- }
-
- return 1;
-}
-
-static void bus_method_resolve_address_complete(DnsQuery *q) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
- unsigned added = 0, i;
- int r;
-
- assert(q);
-
- if (q->state != DNS_TRANSACTION_SUCCESS) {
- r = reply_query_state(q);
- goto finish;
- }
-
- r = sd_bus_message_new_method_return(q->request, &reply);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append(reply, "i", q->answer_ifindex);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_open_container(reply, 'a', "s");
- if (r < 0)
- goto finish;
-
- if (q->answer) {
- answer = dns_answer_ref(q->answer);
-
- for (i = 0; i < answer->n_rrs; i++) {
- r = dns_question_matches_rr(q->question, answer->rrs[i]);
- if (r < 0)
- goto finish;
- if (r == 0)
- continue;
-
- r = sd_bus_message_append(reply, "s", answer->rrs[i]->ptr.name);
- if (r < 0)
- goto finish;
-
- added ++;
- }
- }
-
- if (added == 0) {
- _cleanup_free_ char *ip = NULL;
-
- in_addr_to_string(q->request_family, &q->request_address, &ip);
-
- 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;
- }
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family));
- if (r < 0)
- goto finish;
-
- r = sd_bus_send(q->manager->bus, reply, NULL);
-
-finish:
- if (r < 0) {
- log_error_errno(r, "Failed to send address reply: %m");
- sd_bus_reply_method_errno(q->request, -r, NULL);
- }
-
- dns_query_free(q);
-}
-
-static int bus_method_resolve_address(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
- _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
- _cleanup_free_ char *reverse = NULL;
- Manager *m = userdata;
- int family, ifindex;
- uint64_t flags;
- const void *d;
- DnsQuery *q;
- size_t sz;
- int r;
-
- assert(bus);
- assert(message);
- assert(m);
-
- r = sd_bus_message_read(message, "ii", &ifindex, &family);
- if (r < 0)
- return r;
-
- if (!IN_SET(family, AF_INET, AF_INET6))
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);
-
- r = sd_bus_message_read_array(message, 'y', &d, &sz);
- if (r < 0)
- return r;
-
- if (sz != FAMILY_ADDRESS_SIZE(family))
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size");
-
- r = sd_bus_message_read(message, "t", &flags);
- if (r < 0)
- return r;
-
- r = check_ifindex_flags(ifindex, &flags, error);
- if (r < 0)
- return r;
-
- r = dns_name_reverse(family, d, &reverse);
- if (r < 0)
- return r;
-
- question = dns_question_new(1);
- if (!question)
- return -ENOMEM;
-
- key = dns_resource_key_new_consume(DNS_CLASS_IN, DNS_TYPE_PTR, reverse);
- if (!key)
- return -ENOMEM;
-
- reverse = NULL;
-
- r = dns_question_add(question, key);
- if (r < 0)
- return r;
-
- r = dns_query_new(m, &q, question, ifindex, flags);
- if (r < 0)
- return r;
-
- q->request = sd_bus_message_ref(message);
- q->request_family = family;
- memcpy(&q->request_address, d, sz);
- q->complete = bus_method_resolve_address_complete;
-
- r = dns_query_bus_track(q, bus, message);
- if (r < 0)
- return r;
-
- r = dns_query_go(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;
- }
-
- return 1;
-}
-
-static void bus_method_resolve_record_complete(DnsQuery *q) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
- _cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
- unsigned added = 0, i;
- int r;
-
- assert(q);
-
- if (q->state != DNS_TRANSACTION_SUCCESS) {
- r = reply_query_state(q);
- goto finish;
- }
-
- r = sd_bus_message_new_method_return(q->request, &reply);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append(reply, "i", q->answer_ifindex);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_open_container(reply, 'a', "(qqay)");
- if (r < 0)
- goto finish;
-
- if (q->answer) {
- answer = dns_answer_ref(q->answer);
-
- for (i = 0; i < answer->n_rrs; i++) {
- _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
- size_t start;
-
- r = dns_question_matches_rr(q->question, answer->rrs[i]);
- if (r < 0)
- goto finish;
- if (r == 0)
- continue;
-
- r = dns_packet_new(&p, DNS_PROTOCOL_DNS, 0);
- if (r < 0)
- goto finish;
-
- r = dns_packet_append_rr(p, answer->rrs[i], &start);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_open_container(reply, 'r', "qqay");
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append(reply, "qq", answer->rrs[i]->key->class, answer->rrs[i]->key->type);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append_array(reply, 'y', DNS_PACKET_DATA(p) + start, p->size - start);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- goto finish;
-
- added ++;
- }
- }
-
- if (added <= 0) {
- r = sd_bus_reply_method_errorf(q->request, BUS_ERROR_NO_SUCH_RR, "Name '%s' does not have any RR of the requested type", q->request_hostname);
- goto finish;
- }
-
- r = sd_bus_message_close_container(reply);
- if (r < 0)
- goto finish;
-
- r = sd_bus_message_append(reply, "t", SD_RESOLVED_FLAGS_MAKE(q->answer_protocol, q->answer_family));
- if (r < 0)
- goto finish;
-
- r = sd_bus_send(q->manager->bus, reply, NULL);
-
-finish:
- if (r < 0) {
- log_error_errno(r, "Failed to send record reply: %m");
- sd_bus_reply_method_errno(q->request, -r, NULL);
- }
-
- dns_query_free(q);
-}
-
-static int bus_method_resolve_record(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
- _cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
- _cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
- Manager *m = userdata;
- uint16_t class, type;
- const char *name;
- int r, ifindex;
- uint64_t flags;
- DnsQuery *q;
-
- assert(bus);
- assert(message);
- assert(m);
-
- r = sd_bus_message_read(message, "isqqt", &ifindex, &name, &class, &type, &flags);
- if (r < 0)
- return r;
-
- r = dns_name_normalize(name, NULL);
- if (r < 0)
- return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid name '%s'", name);
-
- r = check_ifindex_flags(ifindex, &flags, error);
- if (r < 0)
- return r;
-
- question = dns_question_new(1);
- if (!question)
- return -ENOMEM;
-
- key = dns_resource_key_new(class, type, name);
- if (!key)
- return -ENOMEM;
-
- r = dns_question_add(question, key);
- if (r < 0)
- return r;
-
- r = dns_query_new(m, &q, question, ifindex, flags);
- if (r < 0)
- return r;
-
- q->request = sd_bus_message_ref(message);
- q->request_hostname = name;
- q->complete = bus_method_resolve_record_complete;
-
- r = dns_query_bus_track(q, bus, message);
- if (r < 0)
- return r;
-
- r = dns_query_go(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;
- }
-
- return 1;
-}
-
-static const sd_bus_vtable resolve_vtable[] = {
- SD_BUS_VTABLE_START(0),
- SD_BUS_METHOD("ResolveHostname", "isit", "ia(iay)st", bus_method_resolve_hostname, SD_BUS_VTABLE_UNPRIVILEGED),
- SD_BUS_METHOD("ResolveAddress", "iiayt", "iast", bus_method_resolve_address, SD_BUS_VTABLE_UNPRIVILEGED),
- SD_BUS_METHOD("ResolveRecord", "isqqt", "ia(qqay)t", bus_method_resolve_record, SD_BUS_VTABLE_UNPRIVILEGED),
- SD_BUS_VTABLE_END,
-};
-
-static int on_bus_retry(sd_event_source *s, usec_t usec, void *userdata) {
- Manager *m = userdata;
-
- assert(s);
- assert(m);
-
- m->bus_retry_event_source = sd_event_source_unref(m->bus_retry_event_source);
-
- manager_connect_bus(m);
- return 0;
-}
-
-static int match_prepare_for_sleep(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
- Manager *m = userdata;
- int b, r;
-
- assert(bus);
- assert(bus);
-
- r = sd_bus_message_read(message, "b", &b);
- if (r < 0) {
- log_debug_errno(r, "Failed to parse PrepareForSleep signal: %m");
- return 0;
- }
-
- if (b)
- return 0;
-
- log_debug("Coming back from suspend, verifying all RRs...");
-
- manager_verify_all(m);
- return 0;
-}
-
-int manager_connect_bus(Manager *m) {
- int r;
-
- assert(m);
-
- if (m->bus)
- return 0;
-
- r = sd_bus_default_system(&m->bus);
- if (r < 0) {
- /* We failed to connect? Yuck, we must be in early
- * boot. Let's try in 5s again. As soon as we have
- * kdbus we can stop doing this... */
-
- log_debug_errno(r, "Failed to connect to bus, trying again in 5s: %m");
-
- r = sd_event_add_time(m->event, &m->bus_retry_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + 5*USEC_PER_SEC, 0, on_bus_retry, m);
- if (r < 0)
- return log_error_errno(r, "Failed to install bus reconnect time event: %m");
-
- return 0;
- }
-
- r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/resolve1", "org.freedesktop.resolve1.Manager", resolve_vtable, m);
- if (r < 0)
- return log_error_errno(r, "Failed to register object: %m");
-
- r = sd_bus_request_name(m->bus, "org.freedesktop.resolve1", 0);
- if (r < 0)
- return log_error_errno(r, "Failed to register name: %m");
-
- r = sd_bus_attach_event(m->bus, m->event, 0);
- if (r < 0)
- return log_error_errno(r, "Failed to attach bus to event loop: %m");
-
- r = sd_bus_add_match(m->bus, &m->prepare_for_sleep_slot,
- "type='signal',"
- "sender='org.freedesktop.login1',"
- "interface='org.freedesktop.login1.Manager',"
- "member='PrepareForSleep',"
- "path='/org/freedesktop/login1'",
- match_prepare_for_sleep,
- m);
- if (r < 0)
- log_error_errno(r, "Failed to add match for PrepareForSleep: %m");
-
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff