mirror of
https://github.com/systemd/systemd.git
synced 2025-03-15 06:50:17 +03:00
../src/resolve/resolved-bus.c: In function ‘call_link_method’: ../src/resolve/resolved-bus.c:1769:16: warning: ‘l’ may be used uninitialized [-Wmaybe-uninitialized] 1769 | return handler(message, l, error); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ ../src/resolve/resolved-bus.c:1755:15: note: ‘l’ was declared here 1755 | Link *l; | ^ ../src/resolve/resolved-bus.c: In function ‘bus_method_get_link’: ../src/resolve/resolved-bus.c:1828:13: warning: ‘l’ may be used uninitialized [-Wmaybe-uninitialized] 1828 | p = link_bus_path(l); | ^~~~~~~~~~~~~~~~ ../src/resolve/resolved-bus.c:1816:15: note: ‘l’ was declared here 1816 | Link *l; | ^ (cherry picked from commit 5f911aca8434b4163514019fcb4c1c967a50617c)
2318 lines
82 KiB
C
2318 lines
82 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
|
|
#include "alloc-util.h"
|
|
#include "bus-common-errors.h"
|
|
#include "bus-get-properties.h"
|
|
#include "bus-locator.h"
|
|
#include "bus-log-control-api.h"
|
|
#include "bus-message-util.h"
|
|
#include "bus-polkit.h"
|
|
#include "dns-domain.h"
|
|
#include "format-util.h"
|
|
#include "memory-util.h"
|
|
#include "missing_capability.h"
|
|
#include "path-util.h"
|
|
#include "resolved-bus.h"
|
|
#include "resolved-def.h"
|
|
#include "resolved-dns-stream.h"
|
|
#include "resolved-dns-synthesize.h"
|
|
#include "resolved-dnssd-bus.h"
|
|
#include "resolved-dnssd.h"
|
|
#include "resolved-link-bus.h"
|
|
#include "resolved-resolv-conf.h"
|
|
#include "socket-netlink.h"
|
|
#include "stdio-util.h"
|
|
#include "strv.h"
|
|
#include "syslog-util.h"
|
|
#include "user-util.h"
|
|
#include "utf8.h"
|
|
|
|
BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_resolve_support, resolve_support, ResolveSupport);
|
|
|
|
static int query_on_bus_track(sd_bus_track *t, void *userdata) {
|
|
DnsQuery *q = ASSERT_PTR(userdata);
|
|
|
|
assert(t);
|
|
|
|
if (!DNS_TRANSACTION_IS_LIVE(q->state))
|
|
return 0;
|
|
|
|
log_debug("Client of active query vanished, aborting query.");
|
|
dns_query_complete(q, DNS_TRANSACTION_ABORTED);
|
|
return 0;
|
|
}
|
|
|
|
static int dns_query_bus_track(DnsQuery *q, sd_bus_message *m) {
|
|
int r;
|
|
|
|
assert(q);
|
|
assert(m);
|
|
|
|
if (!q->bus_track) {
|
|
r = sd_bus_track_new(sd_bus_message_get_bus(m), &q->bus_track, query_on_bus_track, q);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_bus_track_add_sender(q->bus_track, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static sd_bus_message *dns_query_steal_request(DnsQuery *q) {
|
|
assert(q);
|
|
|
|
/* Find the main query, it's the one that owns the message */
|
|
while (q->auxiliary_for)
|
|
q = q->auxiliary_for;
|
|
|
|
/* Let's take the request message out of the DnsQuery object, so that we never send requests twice */
|
|
return TAKE_PTR(q->bus_request);
|
|
}
|
|
|
|
_sd_printf_(3, 4) static int reply_method_errorf(
|
|
DnsQuery *query,
|
|
const char *error_name,
|
|
const char *format,
|
|
...) {
|
|
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL;
|
|
va_list ap;
|
|
int r;
|
|
|
|
assert(query);
|
|
assert(format);
|
|
|
|
req = dns_query_steal_request(query);
|
|
if (!req) /* No bus message set anymore? then we already replied already, let's not answer a second time */
|
|
return 0;
|
|
|
|
va_start(ap, format);
|
|
r = sd_bus_reply_method_errorfv(req, error_name, format, ap);
|
|
va_end(ap);
|
|
|
|
return r;
|
|
}
|
|
|
|
_sd_printf_(3, 4) static int reply_method_errnof(
|
|
DnsQuery *query,
|
|
int err,
|
|
const char *format,
|
|
...) {
|
|
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL;
|
|
int r;
|
|
|
|
assert(query);
|
|
|
|
req = dns_query_steal_request(query);
|
|
if (!req) /* No bus message set anymore? then we already replied already, let's not answer a second time */
|
|
return 0;
|
|
|
|
if (format) {
|
|
va_list ap;
|
|
|
|
va_start(ap, format);
|
|
r = sd_bus_reply_method_errnofv(req, err, format, ap);
|
|
va_end(ap);
|
|
} else
|
|
r = sd_bus_reply_method_errno(req, err, NULL);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int reply_query_state(DnsQuery *q) {
|
|
assert(q);
|
|
|
|
switch (q->state) {
|
|
|
|
case DNS_TRANSACTION_NO_SERVERS:
|
|
return reply_method_errorf(q, BUS_ERROR_NO_NAME_SERVERS, "No appropriate name servers or networks for name found");
|
|
|
|
case DNS_TRANSACTION_TIMEOUT:
|
|
return reply_method_errorf(q, SD_BUS_ERROR_TIMEOUT, "Query timed out");
|
|
|
|
case DNS_TRANSACTION_ATTEMPTS_MAX_REACHED:
|
|
return reply_method_errorf(q, SD_BUS_ERROR_TIMEOUT, "All attempts to contact name servers or networks failed");
|
|
|
|
case DNS_TRANSACTION_INVALID_REPLY:
|
|
return reply_method_errorf(q, BUS_ERROR_INVALID_REPLY, "Received invalid reply");
|
|
|
|
case DNS_TRANSACTION_ERRNO:
|
|
return reply_method_errnof(q, q->answer_errno, "Lookup failed due to system error: %m");
|
|
|
|
case DNS_TRANSACTION_ABORTED:
|
|
return reply_method_errorf(q, BUS_ERROR_ABORTED, "Query aborted");
|
|
|
|
case DNS_TRANSACTION_DNSSEC_FAILED:
|
|
return reply_method_errorf(q, BUS_ERROR_DNSSEC_FAILED, "DNSSEC validation failed: %s%s%s%s%s%s",
|
|
dnssec_result_to_string(q->answer_dnssec_result),
|
|
q->answer_ede_rcode >= 0 ? " (" : "",
|
|
q->answer_ede_rcode >= 0 ? FORMAT_DNS_EDE_RCODE(q->answer_ede_rcode) : "",
|
|
(q->answer_ede_rcode >= 0 && !isempty(q->answer_ede_msg)) ? ": " : "",
|
|
q->answer_ede_rcode >= 0 ? strempty(q->answer_ede_msg) : "",
|
|
q->answer_ede_rcode >= 0 ? ")" : "");
|
|
|
|
case DNS_TRANSACTION_NO_TRUST_ANCHOR:
|
|
return reply_method_errorf(q, BUS_ERROR_NO_TRUST_ANCHOR, "No suitable trust anchor known");
|
|
|
|
case DNS_TRANSACTION_RR_TYPE_UNSUPPORTED:
|
|
return reply_method_errorf(q, BUS_ERROR_RR_TYPE_UNSUPPORTED, "Server does not support requested resource record type");
|
|
|
|
case DNS_TRANSACTION_NETWORK_DOWN:
|
|
return reply_method_errorf(q, BUS_ERROR_NETWORK_DOWN, "Network is down");
|
|
|
|
case DNS_TRANSACTION_NOT_FOUND:
|
|
/* We return this as NXDOMAIN. This is only generated when a host doesn't implement LLMNR/TCP, and we
|
|
* thus quickly know that we cannot resolve an in-addr.arpa or ip6.arpa address. */
|
|
return reply_method_errorf(q, BUS_ERROR_DNS_NXDOMAIN, "'%s' not found", dns_query_string(q));
|
|
|
|
case DNS_TRANSACTION_NO_SOURCE:
|
|
return reply_method_errorf(q, BUS_ERROR_NO_SOURCE, "All suitable resolution sources turned off");
|
|
|
|
case DNS_TRANSACTION_STUB_LOOP:
|
|
return reply_method_errorf(q, BUS_ERROR_STUB_LOOP, "Configured DNS server loops back to us");
|
|
|
|
case DNS_TRANSACTION_RCODE_FAILURE: {
|
|
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL;
|
|
|
|
req = dns_query_steal_request(q);
|
|
if (!req) /* No bus message set anymore? then we already replied already, let's not answer a second time */
|
|
return 0;
|
|
|
|
if (q->answer_rcode == DNS_RCODE_NXDOMAIN)
|
|
sd_bus_error_setf(&error, BUS_ERROR_DNS_NXDOMAIN, "Name '%s' not found", dns_query_string(q));
|
|
else {
|
|
const char *rc, *n;
|
|
|
|
rc = FORMAT_DNS_RCODE(q->answer_rcode);
|
|
n = strjoina(_BUS_ERROR_DNS, rc);
|
|
sd_bus_error_setf(&error, n, "Could not resolve '%s', server or network returned error: %s%s%s%s%s%s",
|
|
dns_query_string(q), rc,
|
|
q->answer_ede_rcode >= 0 ? " (" : "",
|
|
q->answer_ede_rcode >= 0 ? FORMAT_DNS_EDE_RCODE(q->answer_ede_rcode) : "",
|
|
(q->answer_ede_rcode >= 0 && !isempty(q->answer_ede_msg)) ? ": " : "",
|
|
q->answer_ede_rcode >= 0 ? strempty(q->answer_ede_msg) : "",
|
|
q->answer_ede_rcode >= 0 ? ")" : "");
|
|
}
|
|
|
|
return sd_bus_reply_method_error(req, &error);
|
|
}
|
|
|
|
case DNS_TRANSACTION_NULL:
|
|
case DNS_TRANSACTION_PENDING:
|
|
case DNS_TRANSACTION_VALIDATING:
|
|
case DNS_TRANSACTION_SUCCESS:
|
|
default:
|
|
assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static int append_address(sd_bus_message *reply, DnsResourceRecord *rr, int ifindex) {
|
|
int r;
|
|
|
|
assert(reply);
|
|
assert(rr);
|
|
|
|
r = sd_bus_message_open_container(reply, 'r', "iiay");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(reply, "i", ifindex);
|
|
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 *query) {
|
|
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = query;
|
|
_cleanup_free_ char *normalized = NULL;
|
|
DnsQuestion *question;
|
|
DnsResourceRecord *rr;
|
|
unsigned added = 0;
|
|
int ifindex, r;
|
|
|
|
assert(q);
|
|
|
|
if (q->state != DNS_TRANSACTION_SUCCESS) {
|
|
r = reply_query_state(q);
|
|
goto finish;
|
|
}
|
|
|
|
r = dns_query_process_cname_many(q);
|
|
if (r == -ELOOP) {
|
|
r = reply_method_errorf(q, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == DNS_QUERY_CNAME) {
|
|
/* This was a cname, and the query was restarted. */
|
|
TAKE_PTR(q);
|
|
return;
|
|
}
|
|
|
|
r = sd_bus_message_new_method_return(q->bus_request, &reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(iiay)");
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
question = dns_query_question_for_protocol(q, q->answer_protocol);
|
|
|
|
DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
|
|
|
|
r = dns_question_matches_rr(question, rr, DNS_SEARCH_DOMAIN_NAME(q->answer_search_domain));
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
r = append_address(reply, rr, ifindex);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (!canonical)
|
|
canonical = dns_resource_record_ref(rr);
|
|
|
|
added++;
|
|
}
|
|
|
|
if (added <= 0) {
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of the requested type", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* The key names are not necessarily normalized, make sure that they are when we return them to our
|
|
* bus clients. */
|
|
assert(canonical);
|
|
r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
/* Return the precise spelling and uppercasing and CNAME target reported by the server */
|
|
r = sd_bus_message_append(
|
|
reply, "st",
|
|
normalized,
|
|
dns_query_reply_flags_make(q));
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
q->bus_request = sd_bus_message_unref(q->bus_request);
|
|
r = sd_bus_send(q->manager->bus, reply, NULL);
|
|
|
|
finish:
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to send hostname reply: %m");
|
|
(void) reply_method_errnof(q, r, NULL);
|
|
}
|
|
}
|
|
|
|
static int validate_and_mangle_flags(
|
|
const char *name,
|
|
uint64_t *flags,
|
|
uint64_t ok,
|
|
sd_bus_error *error) {
|
|
|
|
assert(flags);
|
|
|
|
/* Checks that the client supplied interface index and flags parameter actually are valid and make
|
|
* sense in our method call context. Specifically:
|
|
*
|
|
* 1. Checks that the interface index is either 0 (meaning *all* interfaces) or positive
|
|
*
|
|
* 2. Only the protocols flags and a bunch of NO_XYZ flags are set, at most. Plus additional flags
|
|
* specific to our method, passed in the "ok" parameter.
|
|
*
|
|
* 3. If zero protocol flags are specified it is automatically turned into *all* protocols. This way
|
|
* clients can simply pass 0 as flags and all will work as it should. They can also use this so
|
|
* that clients don't have to know all the protocols resolved implements, but can just specify 0
|
|
* to mean "all supported protocols".
|
|
*/
|
|
|
|
if (*flags & ~(SD_RESOLVED_PROTOCOLS_ALL|
|
|
SD_RESOLVED_NO_CNAME|
|
|
SD_RESOLVED_NO_VALIDATE|
|
|
SD_RESOLVED_NO_SYNTHESIZE|
|
|
SD_RESOLVED_NO_CACHE|
|
|
SD_RESOLVED_NO_ZONE|
|
|
SD_RESOLVED_NO_TRUST_ANCHOR|
|
|
SD_RESOLVED_NO_NETWORK|
|
|
SD_RESOLVED_NO_STALE|
|
|
SD_RESOLVED_RELAX_SINGLE_LABEL|
|
|
ok))
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter");
|
|
|
|
if ((*flags & SD_RESOLVED_PROTOCOLS_ALL) == 0) /* If no protocol is enabled, enable all */
|
|
*flags |= SD_RESOLVED_PROTOCOLS_ALL;
|
|
|
|
/* Imply SD_RESOLVED_NO_SEARCH if permitted and name is dot suffixed. */
|
|
if (name && FLAGS_SET(ok, SD_RESOLVED_NO_SEARCH) && dns_name_dot_suffixed(name) > 0)
|
|
*flags |= SD_RESOLVED_NO_SEARCH;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_as_address(sd_bus_message *m, int ifindex, const char *hostname, int family, uint64_t flags) {
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
|
|
_cleanup_free_ char *canonical = NULL;
|
|
union in_addr_union parsed;
|
|
int r, ff, parsed_ifindex = 0;
|
|
|
|
/* Check if the hostname is actually already an IP address formatted as string. In that case just parse it,
|
|
* let's not attempt to look it up. */
|
|
|
|
r = in_addr_ifindex_from_string_auto(hostname, &ff, &parsed, &parsed_ifindex);
|
|
if (r < 0) /* not an address */
|
|
return 0;
|
|
|
|
if (family != AF_UNSPEC && ff != family)
|
|
return sd_bus_reply_method_errorf(m, BUS_ERROR_NO_SUCH_RR, "The specified address is not of the requested family.");
|
|
if (ifindex > 0 && parsed_ifindex > 0 && parsed_ifindex != ifindex)
|
|
return sd_bus_reply_method_errorf(m, BUS_ERROR_NO_SUCH_RR, "The specified address interface index does not match requested interface.");
|
|
|
|
if (parsed_ifindex > 0)
|
|
ifindex = parsed_ifindex;
|
|
|
|
r = sd_bus_message_new_method_return(m, &reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(iiay)");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_open_container(reply, 'r', "iiay");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(reply, "ii", ifindex, ff);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append_array(reply, 'y', &parsed, FAMILY_ADDRESS_SIZE(ff));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* When an IP address is specified we just return it as canonical name, in order to avoid a DNS
|
|
* look-up. However, we reformat it to make sure it's in a truly canonical form (i.e. on IPv6 the inner
|
|
* omissions are always done the same way). */
|
|
r = in_addr_ifindex_to_string(ff, &parsed, ifindex, &canonical);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(reply, "st", canonical,
|
|
SD_RESOLVED_FLAGS_MAKE(dns_synthesize_protocol(flags), ff, true, true) |
|
|
SD_RESOLVED_SYNTHETIC);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return sd_bus_send(sd_bus_message_get_bus(m), reply, NULL);
|
|
}
|
|
|
|
void bus_client_log(sd_bus_message *m, const char *what) {
|
|
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
|
|
const char *comm = NULL;
|
|
uid_t uid = UID_INVALID;
|
|
pid_t pid = 0;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(what);
|
|
|
|
if (!DEBUG_LOGGING)
|
|
return;
|
|
|
|
r = sd_bus_query_sender_creds(m, SD_BUS_CREDS_PID|SD_BUS_CREDS_UID|SD_BUS_CREDS_COMM|SD_BUS_CREDS_AUGMENT, &creds);
|
|
if (r < 0)
|
|
return (void) log_debug_errno(r, "Failed to query client credentials, ignoring: %m");
|
|
|
|
(void) sd_bus_creds_get_uid(creds, &uid);
|
|
(void) sd_bus_creds_get_pid(creds, &pid);
|
|
(void) sd_bus_creds_get_comm(creds, &comm);
|
|
|
|
log_debug("D-Bus %s request from client PID " PID_FMT " (%s) with UID " UID_FMT,
|
|
what, pid, strna(comm), uid);
|
|
}
|
|
|
|
static int bus_method_resolve_hostname(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
_cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = NULL;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
const char *hostname;
|
|
int family, ifindex;
|
|
uint64_t flags;
|
|
int r;
|
|
|
|
assert(message);
|
|
|
|
assert_cc(sizeof(int) == sizeof(int32_t));
|
|
|
|
r = sd_bus_message_read(message, "isit", &ifindex, &hostname, &family, &flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (ifindex < 0)
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
|
|
|
|
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 = validate_and_mangle_flags(hostname, &flags, SD_RESOLVED_NO_SEARCH, error);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = parse_as_address(message, ifindex, hostname, family, flags);
|
|
if (r != 0)
|
|
return r;
|
|
|
|
r = dns_name_is_valid(hostname);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid hostname '%s'", hostname);
|
|
|
|
r = dns_question_new_address(&question_utf8, family, hostname, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_question_new_address(&question_idna, family, hostname, true);
|
|
if (r < 0 && r != -EALREADY)
|
|
return r;
|
|
|
|
bus_client_log(message, "hostname resolution");
|
|
|
|
r = dns_query_new(m, &q, question_utf8, question_idna ?: question_utf8, NULL, ifindex, flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
q->bus_request = sd_bus_message_ref(message);
|
|
q->request_family = family;
|
|
q->complete = bus_method_resolve_hostname_complete;
|
|
|
|
r = dns_query_bus_track(q, message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_query_go(q);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
TAKE_PTR(q);
|
|
return 1;
|
|
}
|
|
|
|
static void bus_method_resolve_address_complete(DnsQuery *query) {
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = query;
|
|
DnsQuestion *question;
|
|
DnsResourceRecord *rr;
|
|
unsigned added = 0;
|
|
int ifindex, r;
|
|
|
|
assert(q);
|
|
|
|
if (q->state != DNS_TRANSACTION_SUCCESS) {
|
|
r = reply_query_state(q);
|
|
goto finish;
|
|
}
|
|
|
|
r = dns_query_process_cname_many(q);
|
|
if (r == -ELOOP) {
|
|
r = reply_method_errorf(q, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == DNS_QUERY_CNAME) {
|
|
/* This was a cname, and the query was restarted. */
|
|
TAKE_PTR(q);
|
|
return;
|
|
}
|
|
|
|
r = sd_bus_message_new_method_return(q->bus_request, &reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(is)");
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
question = dns_query_question_for_protocol(q, q->answer_protocol);
|
|
|
|
DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
|
|
_cleanup_free_ char *normalized = NULL;
|
|
|
|
r = dns_question_matches_rr(question, rr, NULL);
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
r = dns_name_normalize(rr->ptr.name, 0, &normalized);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_append(reply, "(is)", ifindex, normalized);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
added++;
|
|
}
|
|
|
|
if (added <= 0) {
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_RR,
|
|
"Address %s does not have any RR of requested type",
|
|
IN_ADDR_TO_STRING(q->request_family, &q->request_address));
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_append(reply, "t", dns_query_reply_flags_make(q));
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
q->bus_request = sd_bus_message_unref(q->bus_request);
|
|
r = sd_bus_send(q->manager->bus, reply, NULL);
|
|
|
|
finish:
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to send address reply: %m");
|
|
(void) reply_method_errnof(q, r, NULL);
|
|
}
|
|
}
|
|
|
|
static int bus_method_resolve_address(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
_cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = NULL;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
union in_addr_union a;
|
|
int family, ifindex;
|
|
uint64_t flags;
|
|
int r;
|
|
|
|
assert(message);
|
|
|
|
assert_cc(sizeof(int) == sizeof(int32_t));
|
|
|
|
r = sd_bus_message_read(message, "i", &ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_message_read_in_addr_auto(message, error, &family, &a);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_read(message, "t", &flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (ifindex < 0)
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
|
|
|
|
r = validate_and_mangle_flags(NULL, &flags, 0, error);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_question_new_reverse(&question, family, &a);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
bus_client_log(message, "address resolution");
|
|
|
|
r = dns_query_new(m, &q, question, question, NULL, ifindex, flags|SD_RESOLVED_NO_SEARCH);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
q->bus_request = sd_bus_message_ref(message);
|
|
q->request_family = family;
|
|
q->request_address = a;
|
|
q->complete = bus_method_resolve_address_complete;
|
|
|
|
r = dns_query_bus_track(q, message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_query_go(q);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
TAKE_PTR(q);
|
|
return 1;
|
|
}
|
|
|
|
static int bus_message_append_rr(sd_bus_message *m, DnsResourceRecord *rr, int ifindex) {
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(rr);
|
|
|
|
r = sd_bus_message_open_container(m, 'r', "iqqay");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(m, "iqq",
|
|
ifindex,
|
|
rr->key->class,
|
|
rr->key->type);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_resource_record_to_wire_format(rr, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append_array(m, 'y', rr->wire_format, rr->wire_format_size);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return sd_bus_message_close_container(m);
|
|
}
|
|
|
|
static void bus_method_resolve_record_complete(DnsQuery *query) {
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = query;
|
|
DnsResourceRecord *rr;
|
|
DnsQuestion *question;
|
|
unsigned added = 0;
|
|
int ifindex;
|
|
int r;
|
|
|
|
assert(q);
|
|
|
|
if (q->state != DNS_TRANSACTION_SUCCESS) {
|
|
r = reply_query_state(q);
|
|
goto finish;
|
|
}
|
|
|
|
r = dns_query_process_cname_many(q);
|
|
if (r == -ELOOP) {
|
|
r = reply_method_errorf(q, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == DNS_QUERY_CNAME) {
|
|
/* This was a cname, and the query was restarted. */
|
|
TAKE_PTR(q);
|
|
return;
|
|
}
|
|
|
|
r = sd_bus_message_new_method_return(q->bus_request, &reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(iqqay)");
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
question = dns_query_question_for_protocol(q, q->answer_protocol);
|
|
|
|
DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
|
|
r = dns_question_matches_rr(question, rr, NULL);
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
r = bus_message_append_rr(reply, rr, ifindex);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
added++;
|
|
}
|
|
|
|
if (added <= 0) {
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_RR, "Name '%s' does not have any RR of the requested type", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_append(reply, "t", dns_query_reply_flags_make(q));
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
q->bus_request = sd_bus_message_unref(q->bus_request);
|
|
r = sd_bus_send(q->manager->bus, reply, NULL);
|
|
|
|
finish:
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to send record reply: %m");
|
|
(void) reply_method_errnof(q, r, NULL);
|
|
}
|
|
}
|
|
|
|
static int bus_method_resolve_record(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_(dns_query_freep) DnsQuery *q = NULL;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
uint16_t class, type;
|
|
const char *name;
|
|
int r, ifindex;
|
|
uint64_t flags;
|
|
|
|
assert(message);
|
|
|
|
assert_cc(sizeof(int) == sizeof(int32_t));
|
|
|
|
r = sd_bus_message_read(message, "isqqt", &ifindex, &name, &class, &type, &flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (ifindex < 0)
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
|
|
|
|
r = dns_name_is_valid(name);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid name '%s'", name);
|
|
|
|
if (!dns_type_is_valid_query(type))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified resource record type %" PRIu16 " may not be used in a query.", type);
|
|
if (dns_type_is_zone_transfer(type))
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Zone transfers not permitted via this programming interface.");
|
|
if (dns_type_is_obsolete(type))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Specified DNS resource record type %" PRIu16 " is obsolete.", type);
|
|
|
|
r = validate_and_mangle_flags(name, &flags, 0, 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, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
bus_client_log(message, "resource record resolution");
|
|
|
|
/* Setting SD_RESOLVED_CLAMP_TTL: let's request that the TTL is fixed up for locally cached entries,
|
|
* after all we return it in the wire format blob. */
|
|
r = dns_query_new(m, &q, question, question, NULL, ifindex, flags|SD_RESOLVED_NO_SEARCH|SD_RESOLVED_CLAMP_TTL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
q->bus_request = sd_bus_message_ref(message);
|
|
q->complete = bus_method_resolve_record_complete;
|
|
|
|
r = dns_query_bus_track(q, message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_query_go(q);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
TAKE_PTR(q);
|
|
return 1;
|
|
}
|
|
|
|
static int append_srv(DnsQuery *q, sd_bus_message *reply, DnsResourceRecord *rr) {
|
|
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
|
|
_cleanup_free_ char *normalized = NULL;
|
|
int r;
|
|
|
|
assert(q);
|
|
assert(reply);
|
|
assert(rr);
|
|
assert(rr->key);
|
|
|
|
if (rr->key->type != DNS_TYPE_SRV)
|
|
return 0;
|
|
|
|
if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
|
|
/* First, let's see if we could find an appropriate A or AAAA
|
|
* record for the SRV record */
|
|
LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) {
|
|
DnsResourceRecord *zz;
|
|
DnsQuestion *question;
|
|
|
|
if (aux->state != DNS_TRANSACTION_SUCCESS)
|
|
continue;
|
|
if (aux->auxiliary_result != 0)
|
|
continue;
|
|
|
|
question = dns_query_question_for_protocol(aux, aux->answer_protocol);
|
|
|
|
r = dns_name_equal(dns_question_first_name(question), rr->srv.name);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
DNS_ANSWER_FOREACH(zz, aux->answer) {
|
|
|
|
r = dns_question_matches_rr(question, zz, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
canonical = dns_resource_record_ref(zz);
|
|
break;
|
|
}
|
|
|
|
if (canonical)
|
|
break;
|
|
}
|
|
|
|
/* Is there are successful A/AAAA lookup for this SRV RR? If not, don't add it */
|
|
if (!canonical)
|
|
return 0;
|
|
}
|
|
|
|
r = sd_bus_message_open_container(reply, 'r', "qqqsa(iiay)s");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_name_normalize(rr->srv.name, 0, &normalized);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(
|
|
reply,
|
|
"qqqs",
|
|
rr->srv.priority, rr->srv.weight, rr->srv.port, normalized);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(iiay)");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
|
|
LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) {
|
|
DnsResourceRecord *zz;
|
|
DnsQuestion *question;
|
|
int ifindex;
|
|
|
|
if (aux->state != DNS_TRANSACTION_SUCCESS)
|
|
continue;
|
|
if (aux->auxiliary_result != 0)
|
|
continue;
|
|
|
|
question = dns_query_question_for_protocol(aux, aux->answer_protocol);
|
|
|
|
r = dns_name_equal(dns_question_first_name(question), rr->srv.name);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
DNS_ANSWER_FOREACH_IFINDEX(zz, ifindex, aux->answer) {
|
|
|
|
r = dns_question_matches_rr(question, zz, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
r = append_address(reply, zz, ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
}
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (canonical) {
|
|
normalized = mfree(normalized);
|
|
|
|
r = dns_name_normalize(dns_resource_key_name(canonical->key), 0, &normalized);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
/* Note that above we appended the hostname as encoded in the
|
|
* SRV, and here the canonical hostname this maps to. */
|
|
r = sd_bus_message_append(reply, "s", normalized);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int append_txt(sd_bus_message *reply, DnsResourceRecord *rr) {
|
|
int r;
|
|
|
|
assert(reply);
|
|
assert(rr);
|
|
assert(rr->key);
|
|
|
|
if (rr->key->type != DNS_TYPE_TXT)
|
|
return 0;
|
|
|
|
LIST_FOREACH(items, i, rr->txt.items) {
|
|
|
|
if (i->length <= 0)
|
|
continue;
|
|
|
|
r = sd_bus_message_append_array(reply, 'y', i->data, i->length);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void resolve_service_all_complete(DnsQuery *query) {
|
|
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *canonical = NULL;
|
|
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
|
|
_cleanup_free_ char *name = NULL, *type = NULL, *domain = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = query;
|
|
DnsQuestion *question;
|
|
DnsResourceRecord *rr;
|
|
unsigned added = 0;
|
|
int r;
|
|
|
|
assert(q);
|
|
|
|
if (q->block_all_complete > 0) {
|
|
TAKE_PTR(q);
|
|
return;
|
|
}
|
|
|
|
if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
|
|
DnsQuery *bad = NULL;
|
|
bool have_success = false;
|
|
|
|
LIST_FOREACH(auxiliary_queries, aux, q->auxiliary_queries) {
|
|
|
|
switch (aux->state) {
|
|
|
|
case DNS_TRANSACTION_PENDING:
|
|
/* If an auxiliary query is still pending, let's wait */
|
|
TAKE_PTR(q);
|
|
return;
|
|
|
|
case DNS_TRANSACTION_SUCCESS:
|
|
if (aux->auxiliary_result == 0)
|
|
have_success = true;
|
|
else
|
|
bad = aux;
|
|
break;
|
|
|
|
default:
|
|
bad = aux;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!have_success) {
|
|
/* We can only return one error, hence pick the last error we encountered */
|
|
|
|
assert(bad);
|
|
|
|
if (bad->state == DNS_TRANSACTION_SUCCESS) {
|
|
assert(bad->auxiliary_result != 0);
|
|
|
|
if (bad->auxiliary_result == -ELOOP) {
|
|
r = reply_method_errorf(q, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(bad));
|
|
goto finish;
|
|
}
|
|
|
|
assert(bad->auxiliary_result < 0);
|
|
r = bad->auxiliary_result;
|
|
goto finish;
|
|
}
|
|
|
|
r = reply_query_state(bad);
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
r = sd_bus_message_new_method_return(q->bus_request, &reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(qqqsa(iiay)s)");
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
question = dns_query_question_for_protocol(q, q->answer_protocol);
|
|
|
|
DNS_ANSWER_FOREACH(rr, q->answer) {
|
|
r = dns_question_matches_rr(question, rr, NULL);
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
r = append_srv(q, reply, rr);
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0) /* not an SRV record */
|
|
continue;
|
|
|
|
if (!canonical)
|
|
canonical = dns_resource_record_ref(rr);
|
|
|
|
added++;
|
|
}
|
|
|
|
if (added <= 0) {
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of the requested type", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "ay");
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
DNS_ANSWER_FOREACH(rr, q->answer) {
|
|
r = dns_question_matches_rr(question, rr, NULL);
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
r = append_txt(reply, rr);
|
|
if (r < 0)
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_message_close_container(reply);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
assert(canonical);
|
|
r = dns_service_split(dns_resource_key_name(canonical->key), &name, &type, &domain);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (isempty(type)) {
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_SERVICE, "'%s' does not provide valid service", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
|
|
r = sd_bus_message_append(
|
|
reply,
|
|
"ssst",
|
|
name, type, domain,
|
|
dns_query_reply_flags_make(q));
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
q->bus_request = sd_bus_message_unref(q->bus_request);
|
|
r = sd_bus_send(q->manager->bus, reply, NULL);
|
|
|
|
finish:
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to send service reply: %m");
|
|
(void) reply_method_errnof(q, r, NULL);
|
|
}
|
|
}
|
|
|
|
static void resolve_service_hostname_complete(DnsQuery *q) {
|
|
int r;
|
|
|
|
assert(q);
|
|
assert(q->auxiliary_for);
|
|
|
|
if (q->state != DNS_TRANSACTION_SUCCESS) {
|
|
resolve_service_all_complete(q->auxiliary_for);
|
|
return;
|
|
}
|
|
|
|
r = dns_query_process_cname_many(q);
|
|
if (r == DNS_QUERY_CNAME) /* This was a cname, and the query was restarted. */
|
|
return;
|
|
|
|
/* This auxiliary lookup is finished or failed, let's see if all are finished now. */
|
|
q->auxiliary_result = r < 0 ? r : 0;
|
|
resolve_service_all_complete(q->auxiliary_for);
|
|
}
|
|
|
|
static int resolve_service_hostname(DnsQuery *q, DnsResourceRecord *rr, int ifindex) {
|
|
_cleanup_(dns_question_unrefp) DnsQuestion *question = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *aux = NULL;
|
|
int r;
|
|
|
|
assert(q);
|
|
assert(rr);
|
|
assert(rr->key);
|
|
assert(rr->key->type == DNS_TYPE_SRV);
|
|
|
|
/* OK, we found an SRV record for the service. Let's resolve
|
|
* the hostname included in it */
|
|
|
|
r = dns_question_new_address(&question, q->request_family, rr->srv.name, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_query_new(q->manager, &aux, question, question, NULL, ifindex, q->flags|SD_RESOLVED_NO_SEARCH);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
aux->request_family = q->request_family;
|
|
aux->complete = resolve_service_hostname_complete;
|
|
|
|
r = dns_query_make_auxiliary(aux, q);
|
|
if (r == -EAGAIN)
|
|
/* Too many auxiliary lookups? If so, don't complain,
|
|
* let's just not add this one, we already have more
|
|
* than enough */
|
|
return 0;
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Note that auxiliary queries do not track the original bus
|
|
* client, only the primary request does that. */
|
|
|
|
r = dns_query_go(aux);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
TAKE_PTR(aux);
|
|
return 1;
|
|
}
|
|
|
|
static void bus_method_resolve_service_complete(DnsQuery *query) {
|
|
_cleanup_(dns_query_freep) DnsQuery *q = query;
|
|
bool has_root_domain = false;
|
|
DnsResourceRecord *rr;
|
|
DnsQuestion *question;
|
|
unsigned found = 0;
|
|
int ifindex, r;
|
|
|
|
assert(q);
|
|
|
|
if (q->state != DNS_TRANSACTION_SUCCESS) {
|
|
r = reply_query_state(q);
|
|
goto finish;
|
|
}
|
|
|
|
r = dns_query_process_cname_many(q);
|
|
if (r == -ELOOP) {
|
|
r = reply_method_errorf(q, BUS_ERROR_CNAME_LOOP, "CNAME loop detected, or CNAME resolving disabled on '%s'", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == DNS_QUERY_CNAME) {
|
|
/* This was a cname, and the query was restarted. */
|
|
TAKE_PTR(q);
|
|
return;
|
|
}
|
|
|
|
question = dns_query_question_for_protocol(q, q->answer_protocol);
|
|
|
|
DNS_ANSWER_FOREACH_IFINDEX(rr, ifindex, q->answer) {
|
|
r = dns_question_matches_rr(question, rr, NULL);
|
|
if (r < 0)
|
|
goto finish;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
if (rr->key->type != DNS_TYPE_SRV)
|
|
continue;
|
|
|
|
if (dns_name_is_root(rr->srv.name)) {
|
|
has_root_domain = true;
|
|
continue;
|
|
}
|
|
|
|
if ((q->flags & SD_RESOLVED_NO_ADDRESS) == 0) {
|
|
q->block_all_complete++;
|
|
r = resolve_service_hostname(q, rr, ifindex);
|
|
q->block_all_complete--;
|
|
|
|
if (r < 0)
|
|
goto finish;
|
|
}
|
|
|
|
found++;
|
|
}
|
|
|
|
if (has_root_domain && found <= 0) {
|
|
/* If there's exactly one SRV RR and it uses the root domain as hostname, then the service is
|
|
* explicitly not offered on the domain. Report this as a recognizable error. See RFC 2782,
|
|
* Section "Usage Rules". */
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_SERVICE, "'%s' does not provide the requested service", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
|
|
if (found <= 0) {
|
|
r = reply_method_errorf(q, BUS_ERROR_NO_SUCH_RR, "'%s' does not have any RR of the requested type", dns_query_string(q));
|
|
goto finish;
|
|
}
|
|
|
|
/* Maybe we are already finished? check now... */
|
|
resolve_service_all_complete(TAKE_PTR(q));
|
|
return;
|
|
|
|
finish:
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to send service reply: %m");
|
|
(void) reply_method_errnof(q, r, NULL);
|
|
}
|
|
}
|
|
|
|
static int bus_method_resolve_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
_cleanup_(dns_question_unrefp) DnsQuestion *question_idna = NULL, *question_utf8 = NULL;
|
|
_cleanup_(dns_query_freep) DnsQuery *q = NULL;
|
|
const char *name, *type, *domain;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
int family, ifindex;
|
|
uint64_t flags;
|
|
int r;
|
|
|
|
assert(message);
|
|
|
|
assert_cc(sizeof(int) == sizeof(int32_t));
|
|
|
|
r = sd_bus_message_read(message, "isssit", &ifindex, &name, &type, &domain, &family, &flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (ifindex < 0)
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid interface index");
|
|
|
|
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);
|
|
|
|
if (isempty(name))
|
|
name = NULL;
|
|
else if (!dns_service_name_is_valid(name))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid service name '%s'", name);
|
|
|
|
if (isempty(type))
|
|
type = NULL;
|
|
else if (!dns_srv_type_is_valid(type))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid SRV service type '%s'", type);
|
|
|
|
r = dns_name_is_valid(domain);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid domain '%s'", domain);
|
|
|
|
if (name && !type)
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Service name cannot be specified without service type.");
|
|
|
|
r = validate_and_mangle_flags(name, &flags, SD_RESOLVED_NO_TXT|SD_RESOLVED_NO_ADDRESS, error);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_question_new_service(&question_utf8, name, type, domain, !(flags & SD_RESOLVED_NO_TXT), false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_question_new_service(&question_idna, name, type, domain, !(flags & SD_RESOLVED_NO_TXT), true);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
bus_client_log(message, "service resolution");
|
|
|
|
r = dns_query_new(m, &q, question_utf8, question_idna, NULL, ifindex, flags|SD_RESOLVED_NO_SEARCH);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
q->bus_request = sd_bus_message_ref(message);
|
|
q->request_family = family;
|
|
q->complete = bus_method_resolve_service_complete;
|
|
|
|
r = dns_query_bus_track(q, message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dns_query_go(q);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
TAKE_PTR(q);
|
|
return 1;
|
|
}
|
|
|
|
int bus_dns_server_append(
|
|
sd_bus_message *reply,
|
|
DnsServer *s,
|
|
bool with_ifindex, /* include "ifindex" field */
|
|
bool extended) { /* also include port number and server name */
|
|
int r;
|
|
|
|
assert(reply);
|
|
|
|
if (!s) {
|
|
if (with_ifindex) {
|
|
if (extended)
|
|
return sd_bus_message_append(reply, "(iiayqs)", 0, AF_UNSPEC, 0, 0, NULL);
|
|
else
|
|
return sd_bus_message_append(reply, "(iiay)", 0, AF_UNSPEC, 0);
|
|
} else {
|
|
if (extended)
|
|
return sd_bus_message_append(reply, "(iayqs)", AF_UNSPEC, 0, 0, NULL);
|
|
else
|
|
return sd_bus_message_append(reply, "(iay)", AF_UNSPEC, 0);
|
|
}
|
|
}
|
|
|
|
r = sd_bus_message_open_container(
|
|
reply,
|
|
'r',
|
|
with_ifindex ? (extended ? "iiayqs" : "iiay") :
|
|
(extended ? "iayqs" : "iay"));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (with_ifindex) {
|
|
r = sd_bus_message_append(reply, "i", dns_server_ifindex(s));
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_bus_message_append(reply, "i", s->family);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append_array(reply, 'y', &s->address, FAMILY_ADDRESS_SIZE(s->family));
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (extended) {
|
|
r = sd_bus_message_append(reply, "q", s->port);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_append(reply, "s", s->server_name);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return sd_bus_message_close_container(reply);
|
|
}
|
|
|
|
static int bus_property_get_dns_servers_internal(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error,
|
|
bool extended) {
|
|
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
Link *l;
|
|
int r;
|
|
|
|
assert(reply);
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', extended ? "(iiayqs)" : "(iiay)");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
LIST_FOREACH(servers, s, m->dns_servers) {
|
|
r = bus_dns_server_append(reply, s, true, extended);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
HASHMAP_FOREACH(l, m->links)
|
|
LIST_FOREACH(servers, s, l->dns_servers) {
|
|
r = bus_dns_server_append(reply, s, true, extended);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return sd_bus_message_close_container(reply);
|
|
}
|
|
|
|
static int bus_property_get_dns_servers(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
return bus_property_get_dns_servers_internal(bus, path, interface, property, reply, userdata, error, false);
|
|
}
|
|
|
|
static int bus_property_get_dns_servers_ex(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
return bus_property_get_dns_servers_internal(bus, path, interface, property, reply, userdata, error, true);
|
|
}
|
|
|
|
static int bus_property_get_fallback_dns_servers_internal(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error,
|
|
bool extended) {
|
|
|
|
DnsServer **f = ASSERT_PTR(userdata);
|
|
int r;
|
|
|
|
assert(reply);
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', extended ? "(iiayqs)" : "(iiay)");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
LIST_FOREACH(servers, s, *f) {
|
|
r = bus_dns_server_append(reply, s, true, extended);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return sd_bus_message_close_container(reply);
|
|
}
|
|
|
|
static int bus_property_get_fallback_dns_servers(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
return bus_property_get_fallback_dns_servers_internal(bus, path, interface, property, reply, userdata, error, false);
|
|
}
|
|
|
|
static int bus_property_get_fallback_dns_servers_ex(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
return bus_property_get_fallback_dns_servers_internal(bus, path, interface, property, reply, userdata, error, true);
|
|
}
|
|
|
|
static int bus_property_get_current_dns_server_internal(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error,
|
|
bool extended) {
|
|
|
|
DnsServer *s;
|
|
|
|
assert(reply);
|
|
assert(userdata);
|
|
|
|
s = *(DnsServer **) userdata;
|
|
|
|
return bus_dns_server_append(reply, s, true, extended);
|
|
}
|
|
|
|
static int bus_property_get_current_dns_server(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
return bus_property_get_current_dns_server_internal(bus, path, interface, property, reply, userdata, error, false);
|
|
}
|
|
|
|
static int bus_property_get_current_dns_server_ex(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
return bus_property_get_current_dns_server_internal(bus, path, interface, property, reply, userdata, error, true);
|
|
}
|
|
|
|
static int bus_property_get_domains(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
Link *l;
|
|
int r;
|
|
|
|
assert(reply);
|
|
|
|
r = sd_bus_message_open_container(reply, 'a', "(isb)");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
LIST_FOREACH(domains, d, m->search_domains) {
|
|
r = sd_bus_message_append(reply, "(isb)", 0, d->name, d->route_only);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
HASHMAP_FOREACH(l, m->links) {
|
|
LIST_FOREACH(domains, d, l->search_domains) {
|
|
r = sd_bus_message_append(reply, "(isb)", l->ifindex, d->name, d->route_only);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
return sd_bus_message_close_container(reply);
|
|
}
|
|
|
|
static int bus_property_get_transaction_statistics(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(reply);
|
|
|
|
return sd_bus_message_append(reply, "(tt)",
|
|
(uint64_t) hashmap_size(m->dns_transactions),
|
|
(uint64_t) m->n_transactions_total);
|
|
}
|
|
|
|
static int bus_property_get_cache_statistics(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
|
|
uint64_t size = 0, hit = 0, miss = 0;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(reply);
|
|
|
|
LIST_FOREACH(scopes, s, m->dns_scopes) {
|
|
size += dns_cache_size(&s->cache);
|
|
hit += s->cache.n_hit;
|
|
miss += s->cache.n_miss;
|
|
}
|
|
|
|
return sd_bus_message_append(reply, "(ttt)", size, hit, miss);
|
|
}
|
|
|
|
static int bus_property_get_dnssec_statistics(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(reply);
|
|
|
|
return sd_bus_message_append(reply, "(tttt)",
|
|
(uint64_t) m->n_dnssec_verdict[DNSSEC_SECURE],
|
|
(uint64_t) m->n_dnssec_verdict[DNSSEC_INSECURE],
|
|
(uint64_t) m->n_dnssec_verdict[DNSSEC_BOGUS],
|
|
(uint64_t) m->n_dnssec_verdict[DNSSEC_INDETERMINATE]);
|
|
}
|
|
|
|
static BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_dns_stub_listener_mode, dns_stub_listener_mode, DnsStubListenerMode);
|
|
static BUS_DEFINE_PROPERTY_GET(bus_property_get_dnssec_supported, "b", Manager, manager_dnssec_supported);
|
|
static BUS_DEFINE_PROPERTY_GET2(bus_property_get_dnssec_mode, "s", Manager, manager_get_dnssec_mode, dnssec_mode_to_string);
|
|
static BUS_DEFINE_PROPERTY_GET2(bus_property_get_dns_over_tls_mode, "s", Manager, manager_get_dns_over_tls_mode, dns_over_tls_mode_to_string);
|
|
|
|
static int bus_property_get_resolv_conf_mode(
|
|
sd_bus *bus,
|
|
const char *path,
|
|
const char *interface,
|
|
const char *property,
|
|
sd_bus_message *reply,
|
|
void *userdata,
|
|
sd_bus_error *error) {
|
|
|
|
int r;
|
|
|
|
assert(reply);
|
|
|
|
r = resolv_conf_mode();
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to test /etc/resolv.conf mode, ignoring: %m");
|
|
return sd_bus_message_append(reply, "s", NULL);
|
|
}
|
|
|
|
return sd_bus_message_append(reply, "s", resolv_conf_mode_to_string(r));
|
|
}
|
|
|
|
static int bus_method_reset_statistics(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(message);
|
|
|
|
bus_client_log(message, "statistics reset");
|
|
|
|
dns_manager_reset_statistics(m);
|
|
|
|
return sd_bus_reply_method_return(message, NULL);
|
|
}
|
|
|
|
static int get_any_link(Manager *m, int ifindex, Link **ret, sd_bus_error *error) {
|
|
Link *l;
|
|
|
|
assert(m);
|
|
assert(ret);
|
|
|
|
l = hashmap_get(m->links, INT_TO_PTR(ifindex));
|
|
if (!l)
|
|
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %i not known", ifindex);
|
|
|
|
*ret = l;
|
|
return 0;
|
|
}
|
|
|
|
static int call_link_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) {
|
|
int ifindex, r;
|
|
Link *l = NULL; /* avoid false maybe-uninitialized warning */
|
|
|
|
assert(m);
|
|
assert(message);
|
|
assert(handler);
|
|
|
|
r = bus_message_read_ifindex(message, error, &ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_any_link(m, ifindex, &l, error);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return handler(message, l, error);
|
|
}
|
|
|
|
static int bus_method_set_link_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_dns_servers, error);
|
|
}
|
|
|
|
static int bus_method_set_link_dns_servers_ex(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_dns_servers_ex, error);
|
|
}
|
|
|
|
static int bus_method_set_link_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_domains, error);
|
|
}
|
|
|
|
static int bus_method_set_link_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_default_route, error);
|
|
}
|
|
|
|
static int bus_method_set_link_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_llmnr, error);
|
|
}
|
|
|
|
static int bus_method_set_link_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_mdns, error);
|
|
}
|
|
|
|
static int bus_method_set_link_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_dns_over_tls, error);
|
|
}
|
|
|
|
static int bus_method_set_link_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_dnssec, error);
|
|
}
|
|
|
|
static int bus_method_set_link_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_set_dnssec_negative_trust_anchors, error);
|
|
}
|
|
|
|
static int bus_method_revert_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
return call_link_method(userdata, message, bus_link_method_revert, error);
|
|
}
|
|
|
|
static int bus_method_get_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
_cleanup_free_ char *p = NULL;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
int r, ifindex;
|
|
Link *l = NULL; /* avoid false maybe-uninitialized warning */
|
|
|
|
assert(message);
|
|
|
|
r = bus_message_read_ifindex(message, error, &ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = get_any_link(m, ifindex, &l, error);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
p = link_bus_path(l);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
return sd_bus_reply_method_return(message, "o", p);
|
|
}
|
|
|
|
static int bus_method_flush_caches(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(message);
|
|
|
|
bus_client_log(message, "cache flush");
|
|
|
|
manager_flush_caches(m, LOG_INFO);
|
|
|
|
return sd_bus_reply_method_return(message, NULL);
|
|
}
|
|
|
|
static int bus_method_reset_server_features(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(message);
|
|
|
|
bus_client_log(message, "server feature reset");
|
|
|
|
(void) dns_stream_disconnect_all(m);
|
|
manager_reset_server_features(m);
|
|
|
|
return sd_bus_reply_method_return(message, NULL);
|
|
}
|
|
|
|
static int dnssd_service_on_bus_track(sd_bus_track *t, void *userdata) {
|
|
DnssdService *s = ASSERT_PTR(userdata);
|
|
|
|
assert(t);
|
|
|
|
log_debug("Client of active request vanished, destroying DNS-SD service.");
|
|
dnssd_service_free(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bus_method_register_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
|
|
_cleanup_(dnssd_service_freep) DnssdService *service = NULL;
|
|
_cleanup_(sd_bus_track_unrefp) sd_bus_track *bus_track = NULL;
|
|
const char *id, *name_template, *type;
|
|
_cleanup_free_ char *path = NULL;
|
|
DnssdService *s = NULL;
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
uid_t euid;
|
|
int r;
|
|
|
|
assert(message);
|
|
|
|
if (m->mdns_support != RESOLVE_SUPPORT_YES)
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Support for MulticastDNS is disabled");
|
|
|
|
service = new0(DnssdService, 1);
|
|
if (!service)
|
|
return log_oom();
|
|
|
|
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_creds_get_euid(creds, &euid);
|
|
if (r < 0)
|
|
return r;
|
|
service->originator = euid;
|
|
service->config_source = RESOLVE_CONFIG_SOURCE_DBUS;
|
|
|
|
r = sd_bus_message_read(message, "sssqqq", &id, &name_template, &type,
|
|
&service->port, &service->priority,
|
|
&service->weight);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!filename_part_is_valid(id))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service identifier '%s' is invalid", id);
|
|
|
|
if (!dnssd_srv_type_is_valid(type))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "DNS-SD service type '%s' is invalid", type);
|
|
|
|
s = hashmap_get(m->dnssd_services, id);
|
|
if (s)
|
|
return sd_bus_error_setf(error, BUS_ERROR_DNSSD_SERVICE_EXISTS, "DNS-SD service '%s' exists already", id);
|
|
|
|
service->id = strdup(id);
|
|
if (!service->id)
|
|
return log_oom();
|
|
|
|
service->name_template = strdup(name_template);
|
|
if (!service->name_template)
|
|
return log_oom();
|
|
|
|
service->type = strdup(type);
|
|
if (!service->type)
|
|
return log_oom();
|
|
|
|
r = dnssd_render_instance_name(m, service, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "a{say}");
|
|
if (r < 0)
|
|
return r;
|
|
|
|
while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_ARRAY, "{say}")) > 0) {
|
|
_cleanup_(dnssd_txtdata_freep) DnssdTxtData *txt_data = NULL;
|
|
DnsTxtItem *last = NULL;
|
|
|
|
txt_data = new0(DnssdTxtData, 1);
|
|
if (!txt_data)
|
|
return log_oom();
|
|
|
|
while ((r = sd_bus_message_enter_container(message, SD_BUS_TYPE_DICT_ENTRY, "say")) > 0) {
|
|
const char *key;
|
|
const void *value;
|
|
size_t size;
|
|
DnsTxtItem *i;
|
|
|
|
r = sd_bus_message_read(message, "s", &key);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (isempty(key))
|
|
return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Keys in DNS-SD TXT RRs can't be empty");
|
|
|
|
if (!ascii_is_valid(key))
|
|
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TXT key '%s' contains non-ASCII symbols", key);
|
|
|
|
r = sd_bus_message_read_array(message, 'y', &value, &size);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = dnssd_txt_item_new_from_data(key, value, size, &i);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
LIST_INSERT_AFTER(items, txt_data->txts, last, i);
|
|
last = i;
|
|
|
|
r = sd_bus_message_exit_container(message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
}
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_exit_container(message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (txt_data->txts) {
|
|
LIST_PREPEND(items, service->txt_data_items, txt_data);
|
|
txt_data = NULL;
|
|
}
|
|
}
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_message_exit_container(message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!service->txt_data_items) {
|
|
_cleanup_(dnssd_txtdata_freep) DnssdTxtData *txt_data = NULL;
|
|
|
|
txt_data = new0(DnssdTxtData, 1);
|
|
if (!txt_data)
|
|
return log_oom();
|
|
|
|
r = dns_txt_item_new_empty(&txt_data->txts);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
LIST_PREPEND(items, service->txt_data_items, txt_data);
|
|
txt_data = NULL;
|
|
}
|
|
|
|
r = sd_bus_path_encode("/org/freedesktop/resolve1/dnssd", service->id, &path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_verify_polkit_async(
|
|
message,
|
|
"org.freedesktop.resolve1.register-service",
|
|
/* details= */ NULL,
|
|
&m->polkit_registry,
|
|
error);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
return 1; /* Polkit will call us back */
|
|
|
|
r = hashmap_ensure_put(&m->dnssd_services, &string_hash_ops, service->id, service);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_track_new(sd_bus_message_get_bus(message), &bus_track, dnssd_service_on_bus_track, service);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_track_add_sender(bus_track, message);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
service->manager = m;
|
|
|
|
service = NULL;
|
|
|
|
manager_refresh_rrs(m);
|
|
|
|
return sd_bus_reply_method_return(message, "o", path);
|
|
}
|
|
|
|
static int call_dnssd_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) {
|
|
_cleanup_free_ char *name = NULL;
|
|
DnssdService *s = NULL;
|
|
const char *path;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(message);
|
|
assert(handler);
|
|
|
|
r = sd_bus_message_read(message, "o", &path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/dnssd", &name);
|
|
if (r == 0)
|
|
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service with object path '%s' does not exist", path);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
s = hashmap_get(m->dnssd_services, name);
|
|
if (!s)
|
|
return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_DNSSD_SERVICE, "DNS-SD service '%s' not known", name);
|
|
|
|
return handler(message, s, error);
|
|
}
|
|
|
|
static int bus_method_unregister_service(sd_bus_message *message, void *userdata, sd_bus_error *error) {
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
|
|
assert(message);
|
|
|
|
return call_dnssd_method(m, message, bus_dnssd_method_unregister, error);
|
|
}
|
|
|
|
static const sd_bus_vtable resolve_vtable[] = {
|
|
SD_BUS_VTABLE_START(0),
|
|
SD_BUS_PROPERTY("LLMNRHostname", "s", NULL, offsetof(Manager, llmnr_hostname), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
|
|
SD_BUS_PROPERTY("LLMNR", "s", bus_property_get_resolve_support, offsetof(Manager, llmnr_support), 0),
|
|
SD_BUS_PROPERTY("MulticastDNS", "s", bus_property_get_resolve_support, offsetof(Manager, mdns_support), 0),
|
|
SD_BUS_PROPERTY("DNSOverTLS", "s", bus_property_get_dns_over_tls_mode, 0, 0),
|
|
SD_BUS_PROPERTY("DNS", "a(iiay)", bus_property_get_dns_servers, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
|
|
SD_BUS_PROPERTY("DNSEx", "a(iiayqs)", bus_property_get_dns_servers_ex, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
|
|
SD_BUS_PROPERTY("FallbackDNS", "a(iiay)", bus_property_get_fallback_dns_servers, offsetof(Manager, fallback_dns_servers), SD_BUS_VTABLE_PROPERTY_CONST),
|
|
SD_BUS_PROPERTY("FallbackDNSEx", "a(iiayqs)", bus_property_get_fallback_dns_servers_ex, offsetof(Manager, fallback_dns_servers), SD_BUS_VTABLE_PROPERTY_CONST),
|
|
SD_BUS_PROPERTY("CurrentDNSServer", "(iiay)", bus_property_get_current_dns_server, offsetof(Manager, current_dns_server), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
|
|
SD_BUS_PROPERTY("CurrentDNSServerEx", "(iiayqs)", bus_property_get_current_dns_server_ex, offsetof(Manager, current_dns_server), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
|
|
SD_BUS_PROPERTY("Domains", "a(isb)", bus_property_get_domains, 0, 0),
|
|
SD_BUS_PROPERTY("TransactionStatistics", "(tt)", bus_property_get_transaction_statistics, 0, 0),
|
|
SD_BUS_PROPERTY("CacheStatistics", "(ttt)", bus_property_get_cache_statistics, 0, 0),
|
|
SD_BUS_PROPERTY("DNSSEC", "s", bus_property_get_dnssec_mode, 0, 0),
|
|
SD_BUS_PROPERTY("DNSSECStatistics", "(tttt)", bus_property_get_dnssec_statistics, 0, 0),
|
|
SD_BUS_PROPERTY("DNSSECSupported", "b", bus_property_get_dnssec_supported, 0, 0),
|
|
SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", bus_property_get_string_set, offsetof(Manager, trust_anchor.negative_by_name), 0),
|
|
SD_BUS_PROPERTY("DNSStubListener", "s", bus_property_get_dns_stub_listener_mode, offsetof(Manager, dns_stub_listener_mode), 0),
|
|
SD_BUS_PROPERTY("ResolvConfMode", "s", bus_property_get_resolv_conf_mode, 0, 0),
|
|
|
|
SD_BUS_METHOD_WITH_ARGS("ResolveHostname",
|
|
SD_BUS_ARGS("i", ifindex, "s", name, "i", family, "t", flags),
|
|
SD_BUS_RESULT("a(iiay)", addresses, "s", canonical, "t", flags),
|
|
bus_method_resolve_hostname,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("ResolveAddress",
|
|
SD_BUS_ARGS("i", ifindex, "i", family, "ay", address, "t", flags),
|
|
SD_BUS_RESULT("a(is)", names, "t", flags),
|
|
bus_method_resolve_address,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("ResolveRecord",
|
|
SD_BUS_ARGS("i", ifindex, "s", name, "q", class, "q", type, "t", flags),
|
|
SD_BUS_RESULT("a(iqqay)", records, "t", flags),
|
|
bus_method_resolve_record,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("ResolveService",
|
|
SD_BUS_ARGS("i", ifindex,
|
|
"s", name,
|
|
"s", type,
|
|
"s", domain,
|
|
"i", family,
|
|
"t", flags),
|
|
SD_BUS_RESULT("a(qqqsa(iiay)s)", srv_data,
|
|
"aay", txt_data,
|
|
"s", canonical_name,
|
|
"s", canonical_type,
|
|
"s", canonical_domain,
|
|
"t", flags),
|
|
bus_method_resolve_service,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("GetLink",
|
|
SD_BUS_ARGS("i", ifindex),
|
|
SD_BUS_RESULT("o", path),
|
|
bus_method_get_link,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDNS",
|
|
SD_BUS_ARGS("i", ifindex, "a(iay)", addresses),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_dns_servers,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDNSEx",
|
|
SD_BUS_ARGS("i", ifindex, "a(iayqs)", addresses),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_dns_servers_ex,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDomains",
|
|
SD_BUS_ARGS("i", ifindex, "a(sb)", domains),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_domains,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDefaultRoute",
|
|
SD_BUS_ARGS("i", ifindex, "b", enable),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_default_route,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkLLMNR",
|
|
SD_BUS_ARGS("i", ifindex, "s", mode),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_llmnr,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkMulticastDNS",
|
|
SD_BUS_ARGS("i", ifindex, "s", mode),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_mdns,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDNSOverTLS",
|
|
SD_BUS_ARGS("i", ifindex, "s", mode),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_dns_over_tls,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDNSSEC",
|
|
SD_BUS_ARGS("i", ifindex, "s", mode),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_dnssec,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("SetLinkDNSSECNegativeTrustAnchors",
|
|
SD_BUS_ARGS("i", ifindex, "as", names),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_set_link_dnssec_negative_trust_anchors,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("RevertLink",
|
|
SD_BUS_ARGS("i", ifindex),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_revert_link,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("RegisterService",
|
|
SD_BUS_ARGS("s", id,
|
|
"s", name_template,
|
|
"s", type,
|
|
"q", service_port,
|
|
"q", service_priority,
|
|
"q", service_weight,
|
|
"aa{say}", txt_datas),
|
|
SD_BUS_RESULT("o", service_path),
|
|
bus_method_register_service,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("UnregisterService",
|
|
SD_BUS_ARGS("o", service_path),
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_unregister_service,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("ResetStatistics",
|
|
SD_BUS_NO_ARGS,
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_reset_statistics,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("FlushCaches",
|
|
SD_BUS_NO_ARGS,
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_flush_caches,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
SD_BUS_METHOD_WITH_ARGS("ResetServerFeatures",
|
|
SD_BUS_NO_ARGS,
|
|
SD_BUS_NO_RESULT,
|
|
bus_method_reset_server_features,
|
|
SD_BUS_VTABLE_UNPRIVILEGED),
|
|
|
|
SD_BUS_VTABLE_END,
|
|
};
|
|
|
|
const BusObjectImplementation manager_object = {
|
|
"/org/freedesktop/resolve1",
|
|
"org.freedesktop.resolve1.Manager",
|
|
.vtables = BUS_VTABLES(resolve_vtable),
|
|
.children = BUS_IMPLEMENTATIONS(&link_object,
|
|
&dnssd_object),
|
|
};
|
|
|
|
static int match_prepare_for_sleep(sd_bus_message *message, void *userdata, sd_bus_error *ret_error) {
|
|
Manager *m = ASSERT_PTR(userdata);
|
|
int b, r;
|
|
|
|
assert(message);
|
|
|
|
r = sd_bus_message_read(message, "b", &b);
|
|
if (r < 0) {
|
|
bus_log_parse_error(r);
|
|
return 0;
|
|
}
|
|
|
|
if (b)
|
|
return 0;
|
|
|
|
log_debug("Coming back from suspend, closing all TCP connections...");
|
|
(void) dns_stream_disconnect_all(m);
|
|
|
|
log_debug("Coming back from suspend, resetting all probed server features...");
|
|
manager_reset_server_features(m);
|
|
|
|
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 = bus_open_system_watch_bind_with_description(&m->bus, "bus-api-resolve");
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to connect to system bus: %m");
|
|
|
|
r = bus_add_implementation(m->bus, &manager_object, m);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = bus_log_control_api_register(m->bus);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.resolve1", 0, NULL, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to request 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 = bus_match_signal_async(
|
|
m->bus,
|
|
NULL,
|
|
bus_login_mgr,
|
|
"PrepareForSleep",
|
|
match_prepare_for_sleep,
|
|
NULL,
|
|
m);
|
|
if (r < 0)
|
|
log_warning_errno(r, "Failed to request match for PrepareForSleep, ignoring: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
int _manager_send_changed(Manager *manager, const char *property, ...) {
|
|
assert(manager);
|
|
|
|
if (sd_bus_is_ready(manager->bus) <= 0)
|
|
return 0;
|
|
|
|
char **l = strv_from_stdarg_alloca(property);
|
|
|
|
int r = sd_bus_emit_properties_changed_strv(
|
|
manager->bus,
|
|
"/org/freedesktop/resolve1",
|
|
"org.freedesktop.resolve1.Manager",
|
|
l);
|
|
if (r < 0)
|
|
log_notice_errno(r, "Failed to emit notification about changed property %s: %m", property);
|
|
return r;
|
|
}
|