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90481c0b1b2ff131f5767633ca569918bcc43d5a
systemd/src/resolve/resolvectl.c
T
Yu Watanabe 90481c0b1b tree-wide: add missing assertions 
Found by coccinelle.
2026-08-18 06:30:10 +09:00

3856 lines
151 KiB
C
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <locale.h>
#include <net/if.h>
#include "sd-bus.h"
#include "sd-daemon.h"
#include "sd-event.h"
#include "sd-json.h"
#include "sd-netlink.h"
#include "sd-varlink.h"
#include "af-list.h"
#include "alloc-util.h"
#include "ansi-color.h"
#include "argv-util.h"
#include "build.h"
#include "bus-common-errors.h"
#include "bus-error.h"
#include "bus-locator.h"
#include "bus-util.h"
#include "crypto-util.h"
#include "dlopen-note.h"
#include "dns-configuration.h"
#include "dns-domain.h"
#include "dns-packet.h"
#include "dns-rr.h"
#include "errno-list.h"
#include "errno-util.h"
#include "format-ifname.h"
#include "format-table.h"
#include "glyph-util.h"
#include "hostname-util.h"
#include "json-util.h"
#include "main-func.h"
#include "missing-network.h"
#include "netlink-util.h"
#include "options.h"
#include "ordered-set.h"
#include "pager.h"
#include "parse-argument.h"
#include "parse-util.h"
#include "polkit-agent.h"
#include "resolvconf-compat.h"
#include "resolve-util.h"
#include "resolvectl.h"
#include "resolved-def.h"
#include "resolved-util.h"
#include "resolve-varlink-util.h"
#include "set.h"
#include "socket-netlink.h"
#include "string-table.h"
#include "string-util.h"
#include "strv.h"
#include "terminal-util.h"
#include "time-util.h"
#include "utf8.h"
#include "varlink-util.h"
#include "verb-log-control.h"
#include "verbs.h"
static int arg_family = AF_UNSPEC;
static int arg_ifindex = 0;
static char *arg_ifname = NULL;
static uint16_t arg_type = 0;
static uint16_t arg_class = 0;
static bool arg_legend = true;
static uint64_t arg_flags = 0;
static sd_json_format_flags_t arg_json_format_flags = SD_JSON_FORMAT_OFF;
static PagerFlags arg_pager_flags = 0;
bool arg_ifindex_permissive = false; /* If true, don't generate an error if the specified interface index doesn't exist */
static const char *arg_service_family = NULL;
static bool arg_service_txt_set = false;
static bool arg_ask_password = true;
typedef enum RawType {
RAW_NONE,
RAW_PAYLOAD,
RAW_PACKET,
} RawType;
static RawType arg_raw = RAW_NONE;
/* Used by compat interfaces: systemd-resolve and resolvconf. */
ExecutionMode arg_mode = MODE_RESOLVE_HOST;
char **arg_set_dns = NULL;
char **arg_set_domain = NULL;
bool arg_disable_default_route = false;
static const char *arg_set_llmnr = NULL;
static const char *arg_set_mdns = NULL;
static const char *arg_set_dns_over_tls = NULL;
static const char *arg_set_dnssec = NULL;
static char **arg_set_nta = NULL;
STATIC_DESTRUCTOR_REGISTER(arg_ifname, freep);
STATIC_DESTRUCTOR_REGISTER(arg_set_dns, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_set_domain, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_set_nta, strv_freep);
COMMAND(
"resolvectl\0",
"Send control commands to the network name resolution manager, or "
"resolve domain names, IPv4 and IPv6 addresses, DNS records, and services.",
.man_pages = "resolvectl.1\0",
.option_namespace = "resolvectl",
.pager_flags = &arg_pager_flags,
);
typedef enum StatusMode {
STATUS_ALL,
STATUS_DNS,
STATUS_DOMAIN,
STATUS_DEFAULT_ROUTE,
STATUS_LLMNR,
STATUS_MDNS,
STATUS_DNS_OVER_TLS,
STATUS_DNSSEC,
STATUS_NTA,
_STATUS_MAX,
_STATUS_INVALID = -EINVAL,
} StatusMode;
static const char* const status_mode_json_field_table[_STATUS_MAX] = {
[STATUS_ALL] = NULL,
[STATUS_DNS] = "servers",
[STATUS_DOMAIN] = "searchDomains",
[STATUS_DEFAULT_ROUTE] = "defaultRoute",
[STATUS_LLMNR] = "llmnr",
[STATUS_MDNS] = "mDNS",
[STATUS_DNS_OVER_TLS] = "dnsOverTLS",
[STATUS_DNSSEC] = "dnssec",
[STATUS_NTA] = "negativeTrustAnchors",
};
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(status_mode_json_field, StatusMode);
static int strv_extend_extended_bool(char ***strv, const char *name, const char *value) {
int r;
if (value) {
r = parse_boolean(value);
if (r >= 0)
return strv_extendf(strv, "%s%s", plus_minus(r), name);
}
return strv_extendf(strv, "%s=%s", name, value ?: "???");
}
static int acquire_bus(sd_bus **ret) {
_cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
int r;
assert(ret);
r = sd_bus_open_system(&bus);
if (r < 0)
return log_error_errno(r, "sd_bus_open_system: %m");
(void) sd_bus_set_allow_interactive_authorization(bus, arg_ask_password);
*ret = TAKE_PTR(bus);
return 0;
}
int ifname_mangle_full(const char *s, bool drop_protocol_specifier) {
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
_cleanup_strv_free_ char **found = NULL;
int r;
assert(s);
if (drop_protocol_specifier) {
_cleanup_free_ char *buf = NULL;
int ifindex_longest_name = -ENODEV;
/* When invoked as resolvconf, drop the protocol specifier(s) at the end. */
buf = strdup(s);
if (!buf)
return log_oom();
for (;;) {
r = rtnl_resolve_interface(&rtnl, buf);
if (r > 0) {
if (ifindex_longest_name <= 0)
ifindex_longest_name = r;
r = strv_extend(&found, buf);
if (r < 0)
return log_oom();
}
char *dot = strrchr(buf, '.');
if (!dot)
break;
*dot = '\0';
}
unsigned n = strv_length(found);
if (n > 1) {
_cleanup_free_ char *joined = NULL;
joined = strv_join(found, ", ");
log_warning("Found multiple interfaces (%s) matching with '%s'. Using '%s' (ifindex=%i).",
strna(joined), s, found[0], ifindex_longest_name);
} else if (n == 1) {
const char *proto;
proto = ASSERT_PTR(startswith(s, found[0]));
if (!isempty(proto))
log_info("Dropped protocol specifier '%s' from '%s'. Using '%s' (ifindex=%i).",
proto, s, found[0], ifindex_longest_name);
}
r = ifindex_longest_name;
} else
r = rtnl_resolve_interface(&rtnl, s);
if (r < 0) {
if (ERRNO_IS_DEVICE_ABSENT(r) && arg_ifindex_permissive) {
log_debug_errno(r, "Interface '%s' not found, but -f specified, ignoring: %m", s);
return 0; /* done */
}
return log_error_errno(r, "Failed to resolve interface \"%s\": %m", s);
}
if (arg_ifindex > 0 && arg_ifindex != r)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Specified multiple different interfaces. Refusing.");
arg_ifindex = r;
return free_and_strdup_warn(&arg_ifname, found ? found[0] : s); /* found */
}
static void print_source(uint64_t flags, usec_t rtt) {
if (!arg_legend)
return;
if (sd_json_format_enabled(arg_json_format_flags))
return;
if (flags == 0)
return;
printf("\n%s-- Information acquired via", ansi_grey());
printf(" protocol%s%s%s%s%s",
flags & SD_RESOLVED_DNS ? " DNS" :"",
flags & SD_RESOLVED_LLMNR_IPV4 ? " LLMNR/IPv4" : "",
flags & SD_RESOLVED_LLMNR_IPV6 ? " LLMNR/IPv6" : "",
flags & SD_RESOLVED_MDNS_IPV4 ? " mDNS/IPv4" : "",
flags & SD_RESOLVED_MDNS_IPV6 ? " mDNS/IPv6" : "");
printf(" in %s.%s\n"
"%s-- Data is authenticated: %s; Data was acquired via local or encrypted transport: %s%s\n",
FORMAT_TIMESPAN(rtt, 100),
ansi_normal(),
ansi_grey(),
yes_no(flags & SD_RESOLVED_AUTHENTICATED),
yes_no(flags & SD_RESOLVED_CONFIDENTIAL),
ansi_normal());
if ((flags & (SD_RESOLVED_FROM_MASK|SD_RESOLVED_SYNTHETIC)) != 0)
printf("%s-- Data from:%s%s%s%s%s%s%s\n",
ansi_grey(),
FLAGS_SET(flags, SD_RESOLVED_SYNTHETIC) ? " synthetic" : "",
FLAGS_SET(flags, SD_RESOLVED_FROM_CACHE) ? " cache" : "",
FLAGS_SET(flags, SD_RESOLVED_FROM_ZONE) ? " zone" : "",
FLAGS_SET(flags, SD_RESOLVED_FROM_TRUST_ANCHOR) ? " trust-anchor" : "",
FLAGS_SET(flags, SD_RESOLVED_FROM_NETWORK) ? " network" : "",
FLAGS_SET(flags, SD_RESOLVED_FROM_HOOK) ? " hook" : "",
ansi_normal());
}
static void print_ifindex_comment(int printed_so_far, int ifindex) {
char ifname[IF_NAMESIZE];
int r;
if (ifindex <= 0)
return;
r = format_ifname(ifindex, ifname);
if (r < 0)
return (void) log_warning_errno(r, "Failed to resolve interface name for index %i, ignoring: %m", ifindex);
printf("%*s%s-- link: %s%s",
60 > printed_so_far ? 60 - printed_so_far : 0, " ", /* Align comment to the 60th column */
ansi_grey(), ifname, ansi_normal());
}
static int dump_resolve_error_json(const char *name, const char *error_id, sd_json_variant *parameters, int ret) {
_cleanup_(sd_json_variant_unrefp) sd_json_variant *j = NULL;
int r;
assert(name);
assert(!isempty(error_id));
if (parameters)
j = sd_json_variant_ref(parameters);
r = sd_json_variant_set_field_string(&j, "name", name);
if (r < 0)
return r;
r = sd_json_variant_set_field_string(&j, "error", error_id);
if (r < 0)
return r;
r = sd_json_variant_dump(j, arg_json_format_flags, /* f= */ NULL, /* prefix= */ NULL);
if (r < 0)
return r;
return ret;
}
static int varlink_log_resolve_error(const char *name, const char *error_id, sd_json_variant *reply, bool warn_missing) {
int r;
assert(name);
assert(!isempty(error_id));
int ret = sd_varlink_error_to_errno(error_id, reply);
_cleanup_(resolve_error_done) ResolveError error = {
.rcode = _DNS_RCODE_INVALID,
.ede_rcode = _DNS_EDE_RCODE_INVALID,
};
if (reply) {
r = dispatch_resolve_error(/* name = */ NULL, reply, SD_JSON_LOG, &error);
if (r < 0)
log_debug_errno(r, "Failed to dispatch error JSON, ignoring: %m");
}
if (error.rcode == DNS_RCODE_NXDOMAIN && !warn_missing)
return -ENXIO;
if (sd_json_format_enabled(arg_json_format_flags))
return dump_resolve_error_json(
name,
error_id,
reply,
error.rcode == DNS_RCODE_NXDOMAIN ? -ENXIO : ret);
static const struct {
const char *error_id;
const char *msg;
} error_message_table[] = {
{ "io.systemd.Resolve.NoNameServers", "No appropriate name servers or networks for name found" },
{ "io.systemd.Resolve.QueryTimedOut", "Query timed out" },
{ "io.systemd.Resolve.MaxAttemptsReached", "All attempts to contact name servers or networks failed" },
{ "io.systemd.Resolve.InvalidReply", "Received invalid reply" },
{ "io.systemd.Resolve.QueryAborted", "Query aborted" },
{ "io.systemd.Resolve.QueryRefused", "DNS query type refused" },
{ "io.systemd.Resolve.NoTrustAnchor", "No suitable trust anchor known" },
{ "io.systemd.Resolve.ResourceRecordTypeUnsupported", "Server does not support requested resource record type" },
{ "io.systemd.Resolve.NetworkDown", "Network is down" },
{ "io.systemd.Resolve.NoSource", "All suitable resolution sources turned off" },
{ "io.systemd.Resolve.StubLoop", "Configured DNS server loops back to us" },
{ "io.systemd.Resolve.ZoneTransfersNotPermitted", "Zone transfers not permitted via this programming interface" },
};
FOREACH_ELEMENT(em, error_message_table)
if (streq(em->error_id, error_id))
return log_error_errno(ret, "%s: resolve call failed: %s", name, em->msg);
if (streq(error_id, "io.systemd.Resolve.NoSuchResourceRecord"))
return log_error_errno(ret, "%s: resolve call failed: '%s' does not have any RR of the requested type", name, name);
if (streq(error_id, "io.systemd.Resolve.CNAMELoop"))
return log_error_errno(ret, "%s: resolve call failed: CNAME loop detected, or CNAME resolving disabled on '%s'", name, name);
if (streq(error_id, "io.systemd.Resolve.ServiceNotProvided"))
return log_error_errno(ret, "%s: resolve call failed: '%s' does not provide the requested service", name, name);
if (streq(error_id, "io.systemd.Resolve.InconsistentServiceRecords"))
return log_error_errno(ret, "%s: resolve call failed: '%s' does not provide a consistent set of service resource records", name, name);
_cleanup_free_ char *msg_extended = NULL;
if (error.ede_rcode >= 0) {
msg_extended = strjoin(" (",
FORMAT_DNS_EDE_RCODE(error.ede_rcode),
!isempty(error.ede_msg) ? ": " : "",
strempty(error.ede_msg),
")");
if (!msg_extended)
return log_oom();
}
if (streq(error_id, "io.systemd.Resolve.DNSSECValidationFailed"))
return log_error_errno(ret, "%s: resolve call failed: DNSSEC validation failed: %s%s", name, error.result, strempty(msg_extended));
if (error.rcode != _DNS_RCODE_INVALID) {
if (error.rcode == DNS_RCODE_NXDOMAIN) {
return log_error_errno(SYNTHETIC_ERRNO(ENXIO), "%s: resolve call failed: Name '%s' not found%s%s",
name, error.query_string ?: name, error.ede_rcode >= 0 ? ":" : "", strempty(msg_extended));
}
return log_error_errno(ret, "%s: resolve call failed: Could not resolve '%s', server or network returned error: %s%s",
name, error.query_string ?: name, FORMAT_DNS_RCODE(error.rcode), strempty(msg_extended));
}
return log_error_errno(ret, "%s: resolve call failed: %s", name, error_id);
}
static int varlink_connect_with_query_timeout(sd_varlink **vl) {
int r;
assert(vl);
r = sd_varlink_connect_address(vl, "/run/systemd/resolve/io.systemd.Resolve");
if (r < 0)
return log_error_errno(r, "Failed to connect to service /run/systemd/resolve/io.systemd.Resolve: %m");
r = sd_varlink_set_relative_timeout(*vl, SD_RESOLVED_QUERY_TIMEOUT_USEC);
if (r < 0)
return log_error_errno(r, "Failed to set query timeout: %m");
return 0;
}
static int resolve_host(const char *name) {
int r;
assert(name);
if (sd_json_format_enabled(arg_json_format_flags))
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Use --json=pretty with --type=A or --type=AAAA to acquire address record information in JSON format.");
log_debug("Resolving %s (family %s, interface %s).", name, af_to_name(arg_family) ?: "*", isempty(arg_ifname) ? "*" : arg_ifname);
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
r = varlink_connect_with_query_timeout(&vl);
if (r < 0)
return r;
usec_t ts = now(CLOCK_MONOTONIC);
const char *error_id = NULL;
sd_json_variant *v = NULL;
r = sd_varlink_callbo(
vl,
"io.systemd.Resolve.ResolveHostname",
&v,
&error_id,
SD_JSON_BUILD_PAIR_STRING("name", name),
JSON_BUILD_PAIR_CONDITION_UNSIGNED(arg_ifindex > 0, "ifindex", arg_ifindex),
JSON_BUILD_PAIR_CONDITION_UNSIGNED(arg_family != AF_UNSPEC, "family", arg_family),
JSON_BUILD_PAIR_UNSIGNED_NON_ZERO("flags", arg_flags));
if (r < 0)
return log_error_errno(r, "Failed to issue varlink call: %m");
ts = now(CLOCK_MONOTONIC) - ts;
if (!isempty(error_id))
return varlink_log_resolve_error(name, error_id, v, /* warn_missing = */ true);
_cleanup_(resolve_hostname_reply_done) ResolveHostnameReply reply = {};
r = dispatch_resolve_hostname_reply(/* name = */ NULL, v, SD_JSON_LOG, &reply);
if (r < 0)
return r;
bool first = true;
FOREACH_ARRAY(address, reply.addresses, reply.n_addresses) {
_cleanup_free_ char *pretty = NULL;
r = in_addr_ifindex_to_string(address->family, &address->in_addr.address, address->ifindex, &pretty);
if (r < 0)
return log_error_errno(r, "Failed to print address for %s: %m", name);
int k = printf("%*s%s %s%s%s",
(int) strlen(name),
first ? name : "",
first ? ":" : " ",
ansi_highlight(),
pretty,
ansi_normal());
print_ifindex_comment(k, address->ifindex);
fputc('\n', stdout);
first = false;
}
if (!streq(name, reply.name))
printf("%*s%s (%s)\n",
(int) strlen(name),
reply.n_addresses == 0 ? name : "",
reply.n_addresses == 0 ? ":" : " ",
reply.name);
if (reply.n_addresses == 0)
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "%s: no addresses found", name);
print_source(reply.flags, ts);
return 0;
}
static int resolve_address(int family, const union in_addr_union *address, int ifindex) {
int r;
assert(IN_SET(family, AF_INET, AF_INET6));
assert(address);
if (sd_json_format_enabled(arg_json_format_flags))
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Use --json=pretty with --type= to acquire resource record information in JSON format.");
if (ifindex <= 0)
ifindex = arg_ifindex;
_cleanup_free_ char *pretty = NULL;
r = in_addr_ifindex_to_string(family, address, ifindex, &pretty);
if (r < 0)
return log_oom();
log_debug("Resolving %s.", pretty);
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
r = varlink_connect_with_query_timeout(&vl);
if (r < 0)
return r;
usec_t ts = now(CLOCK_MONOTONIC);
const char *error_id = NULL;
sd_json_variant *v = NULL;
r = sd_varlink_callbo(
vl,
"io.systemd.Resolve.ResolveAddress",
&v,
&error_id,
SD_JSON_BUILD_PAIR_BYTE_ARRAY("address", &address->bytes, FAMILY_ADDRESS_SIZE_SAFE(family)),
SD_JSON_BUILD_PAIR_UNSIGNED("family", family),
JSON_BUILD_PAIR_CONDITION_UNSIGNED(ifindex > 0, "ifindex", ifindex),
JSON_BUILD_PAIR_UNSIGNED_NON_ZERO("flags", arg_flags));
if (r < 0)
return log_error_errno(r, "Failed to issue varlink call: %m");
ts = now(CLOCK_MONOTONIC) - ts;
if (!isempty(error_id))
return varlink_log_resolve_error(pretty, error_id, v, /* warn_missing = */ true);
_cleanup_(resolve_address_reply_done) ResolveAddressReply reply = {};
r = dispatch_resolve_address_reply(/* name = */ NULL, v, SD_JSON_LOG, &reply);
if (r < 0)
return r;
bool first = true;
FOREACH_ARRAY(name, reply.names, reply.n_names) {
int k = printf("%*s%s %s%s%s",
(int) strlen(pretty),
first ? pretty : "",
first ? ":" : " ",
ansi_highlight(),
name->name,
ansi_normal());
print_ifindex_comment(k, name->ifindex);
fputc('\n', stdout);
first = false;
}
if (reply.n_names == 0)
return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "%s: no names found", pretty);
print_source(reply.flags, ts);
return 0;
}
static int output_rr_packet(DnsResourceRecord *rr, int ifindex) {
int r;
assert(rr);
if (sd_json_format_enabled(arg_json_format_flags)) {
_cleanup_(sd_json_variant_unrefp) sd_json_variant *j = NULL;
r = dns_resource_record_to_json(rr, &j);
if (r < 0)
return log_error_errno(r, "Failed to convert RR to JSON: %m");
if (!j)
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "JSON formatting for records of type %s (%u) not available.", dns_type_to_string(rr->key->type), rr->key->type);
r = sd_json_variant_dump(j, arg_json_format_flags, NULL, NULL);
if (r < 0)
return r;
} else if (arg_raw == RAW_PAYLOAD) {
const void *data;
ssize_t k;
k = dns_resource_record_payload(rr, &data);
if (k == -EINVAL)
return log_error_errno(k, "Dumping of binary payload not available for RRs of this type: %s", dns_type_to_string(rr->key->type));
if (k < 0)
return log_error_errno(k, "Cannot dump RR: %m");
fwrite(data, 1, k, stdout);
} else {
const char *s;
int k;
s = dns_resource_record_to_string(rr);
if (!s)
return log_oom();
k = printf("%s", s);
print_ifindex_comment(k, ifindex);
fputc('\n', stdout);
}
return 0;
}
static DEFINE_POINTER_ARRAY_FREE_FUNC(DnsResourceRecord*, dns_resource_record_unref);
static int idna_candidate(const char *name, char **ret) {
_cleanup_free_ char *idnafied = NULL;
int r;
assert(name);
assert(ret);
r = dns_name_apply_idna(name, &idnafied);
if (r < 0)
return log_error_errno(r, "Failed to apply IDNA to name '%s': %m", name);
if (r > 0 && !streq(name, idnafied)) {
*ret = TAKE_PTR(idnafied);
return true;
}
*ret = NULL;
return false;
}
static bool single_label_nonsynthetic(const char *name) {
_cleanup_free_ char *first_label = NULL;
int r;
if (!dns_name_is_single_label(name))
return false;
if (is_localhost(name) ||
is_gateway_hostname(name) ||
is_outbound_hostname(name) ||
is_dns_stub_hostname(name) ||
is_dns_proxy_stub_hostname(name))
return false;
r = resolve_system_hostname(NULL, &first_label);
if (r < 0) {
log_warning_errno(r, "Failed to determine the hostname: %m");
return false;
}
return !streq(name, first_label);
}
static int resolve_record(const char *name, uint16_t class, uint16_t type, bool warn_missing) {
int r;
assert(name);
log_debug("Resolving %s %s %s (interface %s).", name, dns_class_to_string(class), dns_type_to_string(type), isempty(arg_ifname) ? "*" : arg_ifname);
if (dns_name_dot_suffixed(name) == 0 && single_label_nonsynthetic(name))
log_notice("(Note that search domains are not appended when --type= is specified. "
"Please specify fully qualified domain names, or remove --type= switch from invocation in order to request regular hostname resolution.)");
_cleanup_free_ char *idnafied = NULL;
r = idna_candidate(name, &idnafied);
if (r < 0)
return r;
if (r > 0)
log_notice("(Note that IDNA translation is not applied when --type= is specified. "
"Please specify translated domain names — i.e. '%s' — when resolving raw records, or remove --type= switch from invocation in order to request regular hostname resolution.",
idnafied);
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
r = varlink_connect_with_query_timeout(&vl);
if (r < 0)
return r;
usec_t ts = now(CLOCK_MONOTONIC);
const char *error_id = NULL;
sd_json_variant *v = NULL;
r = sd_varlink_callbo(
vl,
"io.systemd.Resolve.ResolveRecord",
&v,
&error_id,
SD_JSON_BUILD_PAIR_STRING("name", name),
SD_JSON_BUILD_PAIR_UNSIGNED("type", type),
JSON_BUILD_PAIR_CONDITION_UNSIGNED(arg_ifindex > 0, "ifindex", arg_ifindex),
JSON_BUILD_PAIR_UNSIGNED_NON_ZERO("class", class),
JSON_BUILD_PAIR_UNSIGNED_NON_ZERO("flags", arg_flags));
if (r < 0)
return log_error_errno(r, "Failed to issue varlink call: %m");
ts = now(CLOCK_MONOTONIC) - ts;
if (!isempty(error_id)) {
if (streq(error_id, "io.systemd.Resolve.ResourceRecordTypeInvalidForQuery"))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Specified resource record type %" PRIu16 " may not be used in a query", type);
if (streq(error_id, "io.systemd.Resolve.ResourceRecordTypeObsolete"))
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Specified DNS resource record type %" PRIu16 " is obsolete", type);
return varlink_log_resolve_error(name, error_id, v, warn_missing);
}
_cleanup_(resolve_record_reply_done) ResolveRecordReply reply = {};
r = dispatch_resolve_record_reply(/* name = */ NULL, v, SD_JSON_LOG, &reply);
if (r < 0)
return r;
if (reply.n_records == 0) {
if (warn_missing)
log_error("%s: no records found", name);
return -ESRCH;
}
DnsResourceRecord **rrs = new0(DnsResourceRecord*, reply.n_records);
size_t n_rrs = reply.n_records;
if (!rrs)
return log_oom();
CLEANUP_ARRAY(rrs, n_rrs, dns_resource_record_unref_array);
bool json = sd_json_format_enabled(arg_json_format_flags);
bool needs_authentication = false;
FOREACH_ARRAY(record, reply.records, reply.n_records) {
size_t i = record - reply.records;
r = dns_resource_record_new_from_raw(&rrs[i], record->raw.iov_base, record->raw.iov_len);
if (r < 0)
return log_error_errno(r, "Failed to parse RR: %m");
if (dns_type_needs_authentication(rrs[i]->key->type)) {
needs_authentication = true;
if (json && !FLAGS_SET(reply.flags, SD_RESOLVED_AUTHENTICATED))
return log_error_errno(SYNTHETIC_ERRNO(EKEYREJECTED),
"Refusing to output unauthenticated DNS records that require "
"authentication in JSON format.");
}
}
FOREACH_ARRAY(record, reply.records, reply.n_records) {
size_t i = record - reply.records;
if (arg_raw == RAW_PACKET) {
uint64_t u64 = htole64(record->raw.iov_len);
fwrite(&u64, sizeof(u64), 1, stdout);
fwrite(record->raw.iov_base, 1, record->raw.iov_len, stdout);
} else {
r = output_rr_packet(rrs[i], record->ifindex);
if (r < 0)
return r;
}
}
print_source(reply.flags, ts);
if ((reply.flags & SD_RESOLVED_AUTHENTICATED) == 0 && needs_authentication) {
fflush(stdout);
fprintf(stderr, "\n%s"
"WARNING: The resources shown contain cryptographic key data which could not be\n"
" authenticated. It is not suitable to authenticate any communication.\n"
" This is usually indication that DNSSEC authentication was not enabled\n"
" or is not available for the selected protocol or DNS servers.%s\n",
ansi_highlight_red(),
ansi_normal());
}
return 0;
}
static int resolve_rfc4501(const char *name) {
uint16_t type = 0, class = 0;
const char *p, *q, *n;
int r;
assert(name);
assert(startswith(name, "dns:"));
/* Parse RFC 4501 dns: URIs */
p = name + 4;
if (p[0] == '/') {
const char *e;
if (p[1] != '/')
goto invalid;
e = strchr(p + 2, '/');
if (!e)
goto invalid;
if (e != p + 2)
log_warning("DNS authority specification not supported; ignoring specified authority.");
p = e + 1;
}
q = strchr(p, '?');
if (q) {
n = strndupa_safe(p, q - p);
q++;
for (;;) {
const char *f;
f = startswith_no_case(q, "class=");
if (f) {
_cleanup_free_ char *t = NULL;
const char *e;
if (class != 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"DNS class specified twice.");
e = strchrnul(f, ';');
t = strndup(f, e - f);
if (!t)
return log_oom();
r = dns_class_from_string(t);
if (r < 0)
return log_error_errno(r, "Unknown DNS class %s.", t);
class = r;
if (*e == ';') {
q = e + 1;
continue;
}
break;
}
f = startswith_no_case(q, "type=");
if (f) {
_cleanup_free_ char *t = NULL;
const char *e;
if (type != 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"DNS type specified twice.");
e = strchrnul(f, ';');
t = strndup(f, e - f);
if (!t)
return log_oom();
r = dns_type_from_string(t);
if (r < 0)
return log_error_errno(r, "Unknown DNS type %s: %m", t);
type = r;
if (*e == ';') {
q = e + 1;
continue;
}
break;
}
goto invalid;
}
} else
n = p;
if (class == 0)
class = arg_class ?: DNS_CLASS_IN;
if (type == 0)
type = arg_type ?: DNS_TYPE_A;
return resolve_record(n, class, type, true);
invalid:
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Invalid DNS URI: %s", name);
}
VERB(verb_query, "query", "HOSTNAME|ADDRESS…", 2, VERB_ANY, 0,
"Resolve domain names, IPv4 and IPv6 addresses");
static int verb_query(int argc, char *argv[], uintptr_t _data, void *userdata) {
int ret = 0, r;
if (arg_type != 0)
STRV_FOREACH(p, strv_skip(argv, 1))
RET_GATHER(ret, resolve_record(*p, arg_class, arg_type, true));
else
STRV_FOREACH(p, strv_skip(argv, 1)) {
if (startswith(*p, "dns:"))
RET_GATHER(ret, resolve_rfc4501(*p));
else {
int family, ifindex;
union in_addr_union a;
if (arg_raw != RAW_NONE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--raw may only be combined with --type= or dns: URIs.");
r = in_addr_ifindex_from_string_auto(*p, &family, &a, &ifindex);
if (r >= 0)
RET_GATHER(ret, resolve_address(family, &a, ifindex));
else
RET_GATHER(ret, resolve_host(*p));
}
}
return ret;
}
static int resolve_service(const char *name, const char *type, const char *domain, uint64_t flags) {
int r;
assert(domain);
name = empty_to_null(name);
type = empty_to_null(type);
if (name)
log_debug("Resolving service \"%s\" of type %s in %s (family %s, interface %s).", name, type, domain, af_to_name(arg_family) ?: "*", isempty(arg_ifname) ? "*" : arg_ifname);
else if (type)
log_debug("Resolving service type %s of %s (family %s, interface %s).", type, domain, af_to_name(arg_family) ?: "*", isempty(arg_ifname) ? "*" : arg_ifname);
else
log_debug("Resolving service type %s (family %s, interface %s).", domain, af_to_name(arg_family) ?: "*", isempty(arg_ifname) ? "*" : arg_ifname);
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
r = varlink_connect_with_query_timeout(&vl);
if (r < 0)
return r;
usec_t ts = now(CLOCK_MONOTONIC);
const char *error_id = NULL;
sd_json_variant *v = NULL;
r = sd_varlink_callbo(
vl,
"io.systemd.Resolve.ResolveService",
&v,
&error_id,
SD_JSON_BUILD_PAIR_STRING("domain", domain),
JSON_BUILD_PAIR_STRING_NON_EMPTY("name", name),
JSON_BUILD_PAIR_STRING_NON_EMPTY("type", type),
JSON_BUILD_PAIR_CONDITION_UNSIGNED(arg_ifindex > 0, "ifindex", arg_ifindex),
JSON_BUILD_PAIR_CONDITION_UNSIGNED(arg_family != AF_UNSPEC, "family", arg_family),
JSON_BUILD_PAIR_UNSIGNED_NON_ZERO("flags", flags));
if (r < 0)
return log_error_errno(r, "Failed to issue varlink call: %m");
ts = now(CLOCK_MONOTONIC) - ts;
if (!isempty(error_id))
return varlink_log_resolve_error(domain, error_id, v, /* warn_missing = */ true);
_cleanup_(resolve_service_reply_done) ResolveServiceReply reply = {};
r = dispatch_resolve_service_reply(/* name = */ NULL, v, SD_JSON_LOG, &reply);
if (r < 0)
return r;
size_t indent = (name ? strlen(name) + 1 : 0) +
(type ? strlen(type) + 1 : 0) +
strlen(domain) + 2;
bool first = true;
FOREACH_ARRAY(service, reply.services, reply.n_services) {
if (name)
printf("%*s%s", (int) strlen(name), first ? name : "", first ? "/" : " ");
if (type)
printf("%*s%s", (int) strlen(type), first ? type : "", first ? "/" : " ");
printf("%*s%s %s:%u [priority=%u, weight=%u]\n",
(int) strlen(domain),
first ? domain : "",
first ? ":" : " ",
service->hostname,
service->port,
service->priority,
service->weight);
FOREACH_ARRAY(address, service->addresses, service->n_addresses) {
_cleanup_free_ char *pretty = NULL;
r = in_addr_ifindex_to_string(address->family, &address->in_addr.address, address->ifindex, &pretty);
if (r < 0)
return log_error_errno(r, "Failed to print address for %s: %m", name);
int k = printf("%*s%s", (int) indent, "", pretty);
print_ifindex_comment(k, address->ifindex);
fputc('\n', stdout);
}
if (service->canonical_name && !streq_ptr(service->hostname, service->canonical_name))
printf("%*s(%s)\n", (int) indent, "", service->canonical_name);
first = false;
}
STRV_FOREACH(p, reply.txt)
printf("%*s%s\n", (int) indent, "", *p);
const char *canonical_name = empty_to_null(reply.canonical.name);
const char *canonical_type = empty_to_null(reply.canonical.type);
const char *canonical_domain = reply.canonical.domain;
if (!streq_ptr(name, canonical_name) ||
!streq_ptr(type, canonical_type) ||
!streq_ptr(domain, canonical_domain)) {
printf("%*s(", (int) indent, "");
if (canonical_name)
printf("%s/", canonical_name);
if (canonical_type)
printf("%s/", canonical_type);
printf("%s)\n", canonical_domain);
}
print_source(reply.flags, ts);
return 0;
}
VERB(verb_service, "service", "[[NAME] TYPE] DOMAIN", 2, 4, 0,
"Resolve service (SRV)");
static int verb_service(int argc, char *argv[], uintptr_t _data, void *userdata) {
uint64_t flags = arg_flags;
if (sd_json_format_enabled(arg_json_format_flags))
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Use --json=pretty with --type= to acquire resource record information in JSON format.");
if (argc < 4 && !arg_service_txt_set)
flags |= SD_RESOLVED_NO_TXT;
if (argc == 2)
return resolve_service(NULL, NULL, argv[1], flags);
if (argc == 3)
return resolve_service(NULL, argv[1], argv[2], flags);
return resolve_service(argv[1], argv[2], argv[3], flags);
}
#if HAVE_OPENSSL
static int resolve_openpgp(const char *address) {
int r;
assert(address);
const char *domain = strrchr(address, '@');
if (!domain)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Address does not contain '@': \"%s\"", address);
if (domain == address || domain[1] == '\0')
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Address starts or ends with '@': \"%s\"", address);
domain++;
_cleanup_free_ char *hashed = NULL;
r = string_hashsum_sha256(address, domain - 1 - address, &hashed);
if (r < 0)
return log_error_errno(r, "Hashing failed: %m");
strshorten(hashed, 56);
_cleanup_free_ char *suffix = NULL;
r = dns_name_concat("_openpgpkey", domain, /* flags= */ 0, &suffix);
if (r < 0)
return log_error_errno(r, "Failed to join DNS suffix: %m");
_cleanup_free_ char *full = NULL;
r = dns_name_concat(hashed, suffix, /* flags= */ 0, &full);
if (r < 0)
return log_error_errno(r, "Failed to join OPENPGPKEY name: %m");
log_debug("Looking up \"%s\".", full);
r = resolve_record(
full,
arg_class ?: DNS_CLASS_IN,
arg_type ?: DNS_TYPE_OPENPGPKEY,
/* warn_missing= */ false);
if (!IN_SET(r, -ENXIO, -ESRCH)) /* Not NXDOMAIN or NODATA? Then fail immediately. */
return r;
hashed = mfree(hashed);
r = string_hashsum_sha224(address, domain - 1 - address, &hashed);
if (r < 0)
return log_error_errno(r, "Hashing failed: %m");
full = mfree(full);
r = dns_name_concat(hashed, suffix, /* flags= */ 0, &full);
if (r < 0)
return log_error_errno(r, "Failed to join OPENPGPKEY name: %m");
log_debug("Looking up \"%s\".", full);
return resolve_record(
full,
arg_class ?: DNS_CLASS_IN,
arg_type ?: DNS_TYPE_OPENPGPKEY,
/* warn_missing= */ true);
}
#endif
VERB(verb_openpgp, "openpgp", "EMAIL@DOMAIN…", 2, VERB_ANY, 0,
"Query OpenPGP public key");
static int verb_openpgp(int argc, char *argv[], uintptr_t _data, void *userdata) {
#if HAVE_OPENSSL
int ret = 0;
if (!IN_SET(arg_type, 0, DNS_TYPE_OPENPGPKEY))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "The openpgp command may only be combined with --type=OPENPGPKEY.");
STRV_FOREACH(p, strv_skip(argv, 1))
RET_GATHER(ret, resolve_openpgp(*p));
return ret;
#else
return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "OpenSSL support is disabled, cannot query Open PGP keys.");
#endif
}
static int resolve_tlsa(const char *family, const char *address) {
const char *port;
uint16_t port_num = 443;
_cleanup_free_ char *full = NULL;
int r;
assert(address);
port = strrchr(address, ':');
if (port) {
r = parse_ip_port(port + 1, &port_num);
if (r < 0)
return log_error_errno(r, "Invalid port \"%s\".", port + 1);
address = strndupa_safe(address, port - address);
}
r = asprintf(&full, "_%u._%s.%s",
port_num,
family,
address);
if (r < 0)
return log_oom();
log_debug("Looking up \"%s\".", full);
return resolve_record(full,
arg_class ?: DNS_CLASS_IN,
arg_type ?: DNS_TYPE_TLSA, true);
}
static bool service_family_is_valid(const char *s) {
return STR_IN_SET(s, "tcp", "udp", "sctp");
}
VERB(verb_tlsa, "tlsa", "DOMAIN[:PORT]…", 2, VERB_ANY, 0,
"Query TLS public key");
static int verb_tlsa(int argc, char *argv[], uintptr_t _data, void *userdata) {
const char *family = "tcp";
char **args;
int ret = 0;
assert(argc >= 2);
if (!IN_SET(arg_type, 0, DNS_TYPE_TLSA))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "The tlsa command may only be combined with --type=TLSA.");
if (service_family_is_valid(argv[1])) {
family = argv[1];
args = strv_skip(argv, 2);
} else
args = strv_skip(argv, 1);
if (strv_isempty(args))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "The tlsa command requires at least one domain.");
STRV_FOREACH(p, args)
RET_GATHER(ret, resolve_tlsa(family, *p));
return ret;
}
static int varlink_dump_dns_configuration(sd_json_variant **ret) {
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
sd_json_variant *reply = NULL;
sd_json_variant *v;
int r;
assert(ret);
r = sd_varlink_connect_address(&vl, "/run/systemd/resolve/io.systemd.Resolve");
if (r < 0)
return log_error_errno(r, "Failed to connect to service /run/systemd/resolve/io.systemd.Resolve: %m");
r = varlink_call_and_log(vl, "io.systemd.Resolve.DumpDNSConfiguration", /* parameters= */ NULL, &reply);
if (r < 0)
return r;
v = sd_json_variant_by_key(reply, "configuration");
if (!sd_json_variant_is_array(v))
return log_error_errno(SYNTHETIC_ERRNO(ENODATA), "DumpDNSConfiguration() response missing 'configuration' key.");
*ret = sd_json_variant_ref(v);
return 0;
}
static int status_json_filter_links(sd_json_variant **configuration, char **links) {
_cleanup_set_free_ Set *links_by_index = NULL;
_cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
sd_json_variant *w;
int r;
assert(configuration);
if (links)
STRV_FOREACH(ifname, links) {
int ifindex = rtnl_resolve_interface_or_warn(/* rtnl= */ NULL, *ifname);
if (ifindex < 0)
return ifindex;
r = set_ensure_put(&links_by_index, NULL, INT_TO_PTR(ifindex));
if (r < 0)
return r;
}
JSON_VARIANT_ARRAY_FOREACH(w, *configuration) {
int ifindex = sd_json_variant_unsigned(sd_json_variant_by_key(w, "ifindex"));
if (links_by_index) {
if (ifindex <= 0)
/* Possibly invalid, but most likely unset because this is global
* or delegate configuration. */
continue;
if (!set_contains(links_by_index, INT_TO_PTR(ifindex)))
continue;
} else if (ifindex == LOOPBACK_IFINDEX)
/* By default, exclude the loopback interface. */
continue;
r = sd_json_variant_append_array(&v, w);
if (r < 0)
return r;
}
return json_variant_unref_and_replace(*configuration, v);
}
static int status_json_filter_fields(sd_json_variant **configuration, StatusMode mode) {
_cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
sd_json_variant *w;
const char *field;
int r;
assert(configuration);
field = status_mode_json_field_to_string(mode);
if (!field)
/* Nothing to filter for this mode. */
return 0;
JSON_VARIANT_ARRAY_FOREACH(w, *configuration) {
/* Always include identifier fields like ifname or delegate, and include the requested
* field even if it is empty in the configuration. */
r = sd_json_variant_append_arraybo(
&v,
JSON_BUILD_PAIR_VARIANT_NON_NULL("ifname", sd_json_variant_by_key(w, "ifname")),
JSON_BUILD_PAIR_VARIANT_NON_NULL("ifindex", sd_json_variant_by_key(w, "ifindex")),
JSON_BUILD_PAIR_VARIANT_NON_NULL("delegate", sd_json_variant_by_key(w, "delegate")),
SD_JSON_BUILD_PAIR_VARIANT(field, sd_json_variant_by_key(w, field)));
if (r < 0)
return r;
}
return json_variant_unref_and_replace(*configuration, v);
}
static int format_dns_server_one(DNSConfiguration *configuration, DNSServer *s, char **ret) {
bool global;
int r;
assert(s);
assert(ret);
global = !(configuration->ifindex > 0 || configuration->delegate);
if (global && s->ifindex > 0 && s->ifindex != LOOPBACK_IFINDEX) {
/* This one has an (non-loopback) ifindex set, and we were told to suppress those. Hence do so. */
*ret = NULL;
return 0;
}
r = in_addr_port_ifindex_name_to_string(
s->family,
&s->in_addr,
s->port != 53 ? s->port : 0,
s->ifindex,
s->server_name,
ret);
if (r < 0)
return r;
return 1;
}
static int format_dns_servers(DNSConfiguration *configuration, OrderedSet *servers, char ***ret) {
int r;
assert(ret);
_cleanup_strv_free_ char **l = NULL;
DNSServer *s;
ORDERED_SET_FOREACH(s, servers) {
_cleanup_free_ char *str = NULL;
r = format_dns_server_one(configuration, s, &str);
if (r < 0)
return r;
if (r > 0) {
r = strv_consume(&l, TAKE_PTR(str));
if (r < 0)
return log_oom();
}
}
*ret = TAKE_PTR(l);
return 0;
}
static int format_search_domains(DNSConfiguration *configuration, OrderedSet *domains, char ***ret) {
int r;
assert(ret);
_cleanup_strv_free_ char **l = NULL;
SearchDomain *d;
ORDERED_SET_FOREACH(d, domains) {
if (!(configuration->ifindex > 0 || configuration->delegate) && d->ifindex > 0)
/* Only show the global ones here */
continue;
_cleanup_free_ char *str = NULL;
if (d->route_only)
str = strjoin("~", d->name);
else
str = strdup(d->name);
if (!str)
return log_oom();
r = strv_consume(&l, TAKE_PTR(str));
if (r < 0)
return log_oom();
}
*ret = TAKE_PTR(l);
return 0;
}
static int format_protocol_status(DNSConfiguration *configuration, char ***ret) {
_cleanup_strv_free_ char **s = NULL;
int r;
assert(configuration);
assert(ret);
if (configuration->ifindex > 0) {
r = strv_extendf(&s, "%sDefaultRoute", plus_minus(configuration->default_route));
if (r < 0)
return r;
}
r = strv_extend_extended_bool(&s, "LLMNR", configuration->llmnr_mode_str);
if (r < 0)
return r;
r = strv_extend_extended_bool(&s, "mDNS", configuration->mdns_mode_str);
if (r < 0)
return r;
r = strv_extend_extended_bool(&s, "DNSOverTLS", configuration->dns_over_tls_mode_str);
if (r < 0)
return r;
r = strv_extendf(&s, "DNSSEC=%s/%s",
configuration->dnssec_mode_str ?: "???",
configuration->dnssec_supported ? "supported" : "unsupported");
if (r < 0)
return r;
*ret = TAKE_PTR(s);
return 0;
}
static int format_scopes_string(DNSConfiguration *configuration, char **ret) {
assert(configuration);
assert(ret);
if (!configuration->dns_scopes) {
*ret = NULL;
return 0;
}
uint64_t scopes_mask = 0;
DNSScope *scope;
SET_FOREACH(scope, configuration->dns_scopes) {
if (streq(scope->protocol, "dns"))
scopes_mask |= SD_RESOLVED_DNS;
else if (streq(scope->protocol, "llmnr"))
scopes_mask |= scope->family == AF_INET ?
SD_RESOLVED_LLMNR_IPV4 :
SD_RESOLVED_LLMNR_IPV6;
else if (streq(scope->protocol, "mdns"))
scopes_mask |= scope->family == AF_INET ?
SD_RESOLVED_MDNS_IPV4 :
SD_RESOLVED_MDNS_IPV6;
}
_cleanup_free_ char *buf = NULL;
if (asprintf(&buf, "%s%s%s%s%s",
scopes_mask & SD_RESOLVED_DNS ? "DNS " : "",
scopes_mask & SD_RESOLVED_LLMNR_IPV4 ? "LLMNR/IPv4 " : "",
scopes_mask & SD_RESOLVED_LLMNR_IPV6 ? "LLMNR/IPv6 " : "",
scopes_mask & SD_RESOLVED_MDNS_IPV4 ? "mDNS/IPv4 " : "",
scopes_mask & SD_RESOLVED_MDNS_IPV6 ? "mDNS/IPv6 " : "") < 0)
return log_oom();
size_t len = strlen(buf);
assert(len > 0);
buf[len - 1] = '\0';
*ret = TAKE_PTR(buf);
return 0;
}
static void status_print_header(DNSConfiguration *c) {
assert(c);
if (c->ifname)
printf("%sLink %i (%s)%s\n",
ansi_highlight(),
c->ifindex,
c->ifname,
ansi_normal());
else if (c->delegate)
printf("%sDelegate %s%s\n",
ansi_highlight(),
c->delegate,
ansi_normal());
else
printf("%sGlobal%s\n", ansi_highlight(), ansi_normal());
}
static void status_print_string(DNSConfiguration *c, const char *p) {
assert(c);
if (c->ifname)
printf("%sLink %i (%s)%s: %s\n",
ansi_highlight(),
c->ifindex,
c->ifname,
ansi_normal(),
p);
else if (c->delegate)
printf("%sDelegate %s%s: %s\n",
ansi_highlight(),
c->delegate,
ansi_normal(),
p);
else
printf("%sGlobal%s: %s\n", ansi_highlight(), ansi_normal(), p);
}
static int status_print_strv(DNSConfiguration *c, char **p) {
const unsigned indent = strlen("Global: "); /* Use the same indentation everywhere to make things nice */
int pos1, pos2;
assert(c);
if (c->ifname)
printf("%s%nLink %i (%s)%n%s:", ansi_highlight(), &pos1, c->ifindex, c->ifname, &pos2, ansi_normal());
else if (c->delegate)
printf("%s%nDelegate %s%n%s:", ansi_highlight(), &pos1, c->delegate, &pos2, ansi_normal());
else
printf("%s%nGlobal%n%s:", ansi_highlight(), &pos1, &pos2, ansi_normal());
size_t cols = columns(), position = pos2 - pos1 + 2;
STRV_FOREACH(i, p) {
size_t our_len = utf8_console_width(*i); /* This returns -1 on invalid utf-8 (which shouldn't happen).
* If that happens, we'll just print one item per line. */
if (position <= indent || size_add(size_add(position, 1), our_len) < cols) {
printf(" %s", *i);
position = size_add(size_add(position, 1), our_len);
} else {
printf("\n%*s%s", (int) indent, "", *i);
position = size_add(our_len, indent);
}
}
printf("\n");
return 0;
}
static int dump_list(Table *table, const char *field, char * const *l) {
int r;
if (strv_isempty(l))
return 0;
r = table_add_many(table,
TABLE_FIELD, field,
TABLE_STRV_WRAPPED, l);
if (r < 0)
return table_log_add_error(r);
return 0;
}
static int print_configuration(DNSConfiguration *configuration, StatusMode mode, bool *empty_line) {
_cleanup_(table_unrefp) Table *table = NULL;
int r;
assert(configuration);
POINTER_MAY_BE_NULL(empty_line);
pager_open(arg_pager_flags);
bool global = !(configuration->ifindex > 0 || configuration->delegate);
if (mode == STATUS_DNS) {
_cleanup_strv_free_ char **l = NULL;
r = format_dns_servers(configuration, configuration->dns_servers, &l);
if (r < 0)
return r;
return status_print_strv(configuration, l);
} else if (mode == STATUS_DOMAIN) {
_cleanup_strv_free_ char **l = NULL;
r = format_search_domains(configuration, configuration->search_domains, &l);
if (r < 0)
return r;
return status_print_strv(configuration, l);
} else if (mode == STATUS_NTA) {
if (configuration->delegate)
return 0;
return status_print_strv(configuration, configuration->negative_trust_anchors);
} else if (mode == STATUS_DEFAULT_ROUTE) {
if (global)
return 0;
status_print_string(configuration, yes_no(configuration->default_route));
return 0;
} else if (IN_SET(mode, STATUS_LLMNR, STATUS_MDNS, STATUS_DNS_OVER_TLS, STATUS_DNSSEC)) {
if (configuration->delegate)
return 0;
status_print_string(configuration,
strna(mode == STATUS_LLMNR ? configuration->llmnr_mode_str :
mode == STATUS_MDNS ? configuration->mdns_mode_str :
mode == STATUS_DNS_OVER_TLS ? configuration->dns_over_tls_mode_str :
configuration->dnssec_mode_str));
return 0;
} else if (mode != STATUS_ALL)
return 0;
if (empty_line && *empty_line)
fputc('\n', stdout);
status_print_header(configuration);
table = table_new_vertical();
if (!table)
return log_oom();
if (configuration->ifindex > 0) {
r = table_add_many(table,
TABLE_FIELD, "Current Scopes",
TABLE_SET_MINIMUM_WIDTH, 19);
if (r < 0)
return table_log_add_error(r);
_cleanup_free_ char *s = NULL;
r = format_scopes_string(configuration, &s);
if (r < 0)
return r;
r = table_add_cell(table, NULL, TABLE_STRING, s ?: "none");
if (r < 0)
return table_log_add_error(r);
}
if (!configuration->delegate) {
_cleanup_strv_free_ char **l = NULL;
r = format_protocol_status(configuration, &l);
if (r < 0)
return r;
r = table_add_many(table,
TABLE_FIELD, "Protocols",
TABLE_STRV_WRAPPED, l);
if (r < 0)
return table_log_add_error(r);
}
if (configuration->resolv_conf_mode_str) {
r = table_add_many(table,
TABLE_FIELD, "resolv.conf mode",
TABLE_STRING, configuration->resolv_conf_mode_str);
if (r < 0)
return table_log_add_error(r);
}
if (configuration->current_dns_server) {
_cleanup_free_ char *s = NULL;
r = format_dns_server_one(configuration, configuration->current_dns_server, &s);
if (r < 0)
return r;
r = table_add_many(table,
TABLE_FIELD, "Current DNS Server",
TABLE_STRING, s);
if (r < 0)
return table_log_add_error(r);
}
_cleanup_strv_free_ char **dns_servers = NULL;
r = format_dns_servers(configuration, configuration->dns_servers, &dns_servers);
if (r < 0)
return r;
r = dump_list(table, "DNS Servers", dns_servers);
if (r < 0)
return r;
if (global) {
_cleanup_strv_free_ char **l = NULL;
r = format_dns_servers(configuration, configuration->fallback_dns_servers, &l);
if (r < 0)
return r;
r = dump_list(table, "Fallback DNS Servers", l);
if (r < 0)
return r;
}
_cleanup_strv_free_ char **search_domains = NULL;
r = format_search_domains(configuration, configuration->search_domains, &search_domains);
if (r < 0)
return r;
r = dump_list(table, "DNS Domain", search_domains);
if (r < 0)
return r;
if (!global) {
r = table_add_many(table,
TABLE_FIELD, "Default Route",
TABLE_BOOLEAN, configuration->default_route);
if (r < 0)
return table_log_add_error(r);
}
r = table_print_or_warn(table);
if (r < 0)
return r;
if (empty_line)
*empty_line = true;
return 0;
}
static int status_full(StatusMode mode, char **links) {
bool empty_line = false;
int r;
_cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
r = varlink_dump_dns_configuration(&v);
if (r < 0)
return r;
r = status_json_filter_links(&v, links);
if (r < 0)
return log_error_errno(r, "Failed to filter configuration JSON links: %m");
if (sd_json_format_enabled(arg_json_format_flags)) {
r = status_json_filter_fields(&v, mode);
if (r < 0)
return log_error_errno(r, "Failed to filter configuration JSON fields: %m");
return sd_json_variant_dump(v, arg_json_format_flags, /* f= */ NULL, /* prefix= */ NULL);
}
_cleanup_(dns_configuration_freep) DNSConfiguration *global_config = NULL;
_cleanup_ordered_set_free_ OrderedSet *link_configs = NULL, *delegate_configs = NULL;
sd_json_variant *w;
JSON_VARIANT_ARRAY_FOREACH(w, v) {
_cleanup_(dns_configuration_freep) DNSConfiguration *c = NULL;
r = dns_configuration_from_json(w, &c);
if (r < 0)
return r;
if (c->ifindex > 0) {
r = ordered_set_ensure_put(&link_configs, &dns_configuration_hash_ops, c);
if (r < 0)
return r;
TAKE_PTR(c);
} else if (c->delegate) {
r = ordered_set_ensure_put(&delegate_configs, &dns_configuration_hash_ops, c);
if (r < 0)
return r;
TAKE_PTR(c);
} else {
assert(!global_config);
global_config = TAKE_PTR(c);
}
}
if (global_config) {
r = print_configuration(global_config, mode, &empty_line);
if (r < 0)
return r;
}
DNSConfiguration *c;
ORDERED_SET_FOREACH(c, link_configs) {
r = print_configuration(c, mode, &empty_line);
if (r < 0)
return r;
}
ORDERED_SET_FOREACH(c, delegate_configs) {
r = print_configuration(c, mode, &empty_line);
if (r < 0)
return r;
}
return 0;
}
static int status_all(StatusMode mode) {
return status_full(mode, /* links= */ NULL);
}
static int status_ifindex(int ifindex, StatusMode mode) {
int r;
char ifname[IF_NAMESIZE];
assert(ifindex > 0);
r = format_ifname(ifindex, ifname);
if (r < 0)
return log_error_errno(r, "Failed to resolve interface name for %i: %m", ifindex);
return status_full(mode, STRV_MAKE(ifname));
}
VERB(verb_status, "status", "[LINK…]", VERB_ANY, VERB_ANY, VERB_DEFAULT,
"Show link and server status");
static int verb_status(int argc, char *argv[], uintptr_t _data, void *userdata) {
return status_full(STATUS_ALL, strv_skip(argv, 1));
}
VERB(verb_show_statistics, "statistics", NULL, VERB_ANY, 1, 0,
"Show resolver statistics");
static int verb_show_statistics(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(table_unrefp) Table *table = NULL;
sd_json_variant *reply = NULL;
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = sd_varlink_connect_address(&vl, "/run/systemd/resolve/io.systemd.Resolve.Monitor");
if (r < 0)
return log_error_errno(r, "Failed to connect to query monitoring service /run/systemd/resolve/io.systemd.Resolve.Monitor: %m");
r = varlink_callbo_and_log(
vl,
"io.systemd.Resolve.Monitor.DumpStatistics",
&reply,
SD_JSON_BUILD_PAIR_BOOLEAN("allowInteractiveAuthentication", arg_ask_password));
if (r < 0)
return r;
if (sd_json_format_enabled(arg_json_format_flags))
return sd_json_variant_dump(reply, arg_json_format_flags, NULL, NULL);
struct statistics {
sd_json_variant *transactions;
sd_json_variant *cache;
sd_json_variant *dnssec;
} statistics;
static const sd_json_dispatch_field statistics_dispatch_table[] = {
{ "transactions", SD_JSON_VARIANT_OBJECT, sd_json_dispatch_variant_noref, offsetof(struct statistics, transactions), SD_JSON_MANDATORY },
{ "cache", SD_JSON_VARIANT_OBJECT, sd_json_dispatch_variant_noref, offsetof(struct statistics, cache), SD_JSON_MANDATORY },
{ "dnssec", SD_JSON_VARIANT_OBJECT, sd_json_dispatch_variant_noref, offsetof(struct statistics, dnssec), SD_JSON_MANDATORY },
{},
};
r = sd_json_dispatch(reply, statistics_dispatch_table, SD_JSON_LOG, &statistics);
if (r < 0)
return r;
struct transactions {
uint64_t n_current_transactions;
uint64_t n_transactions_total;
uint64_t n_timeouts_total;
uint64_t n_timeouts_served_stale_total;
uint64_t n_failure_responses_total;
uint64_t n_failure_responses_served_stale_total;
} transactions;
static const sd_json_dispatch_field transactions_dispatch_table[] = {
{ "currentTransactions", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct transactions, n_current_transactions), SD_JSON_MANDATORY },
{ "totalTransactions", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct transactions, n_transactions_total), SD_JSON_MANDATORY },
{ "totalTimeouts", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct transactions, n_timeouts_total), SD_JSON_MANDATORY },
{ "totalTimeoutsServedStale", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct transactions, n_timeouts_served_stale_total), SD_JSON_MANDATORY },
{ "totalFailedResponses", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct transactions, n_failure_responses_total), SD_JSON_MANDATORY },
{ "totalFailedResponsesServedStale", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct transactions, n_failure_responses_served_stale_total), SD_JSON_MANDATORY },
{},
};
r = sd_json_dispatch(statistics.transactions, transactions_dispatch_table, SD_JSON_LOG, &transactions);
if (r < 0)
return r;
struct cache {
uint64_t cache_size;
uint64_t n_cache_hit;
uint64_t n_cache_miss;
} cache;
static const sd_json_dispatch_field cache_dispatch_table[] = {
{ "size", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct cache, cache_size), SD_JSON_MANDATORY },
{ "hits", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct cache, n_cache_hit), SD_JSON_MANDATORY },
{ "misses", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct cache, n_cache_miss), SD_JSON_MANDATORY },
{},
};
r = sd_json_dispatch(statistics.cache, cache_dispatch_table, SD_JSON_LOG, &cache);
if (r < 0)
return r;
struct dnsssec {
uint64_t n_dnssec_secure;
uint64_t n_dnssec_insecure;
uint64_t n_dnssec_bogus;
uint64_t n_dnssec_indeterminate;
} dnsssec;
static const sd_json_dispatch_field dnssec_dispatch_table[] = {
{ "secure", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct dnsssec, n_dnssec_secure), SD_JSON_MANDATORY },
{ "insecure", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct dnsssec, n_dnssec_insecure), SD_JSON_MANDATORY },
{ "bogus", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct dnsssec, n_dnssec_bogus), SD_JSON_MANDATORY },
{ "indeterminate", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct dnsssec, n_dnssec_indeterminate), SD_JSON_MANDATORY },
{},
};
r = sd_json_dispatch(statistics.dnssec, dnssec_dispatch_table, SD_JSON_LOG, &dnsssec);
if (r < 0)
return r;
table = table_new_vertical();
if (!table)
return log_oom();
r = table_add_many(table,
TABLE_STRING, "Transactions",
TABLE_SET_COLOR, ansi_highlight(),
TABLE_SET_ALIGN_PERCENT, 0,
TABLE_EMPTY,
TABLE_FIELD, "Current Transactions",
TABLE_SET_ALIGN_PERCENT, 100,
TABLE_UINT64, transactions.n_current_transactions,
TABLE_SET_ALIGN_PERCENT, 100,
TABLE_FIELD, "Total Transactions",
TABLE_UINT64, transactions.n_transactions_total,
TABLE_EMPTY, TABLE_EMPTY,
TABLE_STRING, "Cache",
TABLE_SET_COLOR, ansi_highlight(),
TABLE_SET_ALIGN_PERCENT, 0,
TABLE_EMPTY,
TABLE_FIELD, "Current Cache Size",
TABLE_SET_ALIGN_PERCENT, 100,
TABLE_UINT64, cache.cache_size,
TABLE_FIELD, "Cache Hits",
TABLE_UINT64, cache.n_cache_hit,
TABLE_FIELD, "Cache Misses",
TABLE_UINT64, cache.n_cache_miss,
TABLE_EMPTY, TABLE_EMPTY,
TABLE_STRING, "Failure Transactions",
TABLE_SET_COLOR, ansi_highlight(),
TABLE_SET_ALIGN_PERCENT, 0,
TABLE_EMPTY,
TABLE_FIELD, "Total Timeouts",
TABLE_SET_ALIGN_PERCENT, 100,
TABLE_UINT64, transactions.n_timeouts_total,
TABLE_FIELD, "Total Timeouts (Stale Data Served)",
TABLE_UINT64, transactions.n_timeouts_served_stale_total,
TABLE_FIELD, "Total Failure Responses",
TABLE_UINT64, transactions.n_failure_responses_total,
TABLE_FIELD, "Total Failure Responses (Stale Data Served)",
TABLE_UINT64, transactions.n_failure_responses_served_stale_total,
TABLE_EMPTY, TABLE_EMPTY,
TABLE_STRING, "DNSSEC Verdicts",
TABLE_SET_COLOR, ansi_highlight(),
TABLE_SET_ALIGN_PERCENT, 0,
TABLE_EMPTY,
TABLE_FIELD, "Secure",
TABLE_SET_ALIGN_PERCENT, 100,
TABLE_UINT64, dnsssec.n_dnssec_secure,
TABLE_FIELD, "Insecure",
TABLE_UINT64, dnsssec.n_dnssec_insecure,
TABLE_FIELD, "Bogus",
TABLE_UINT64, dnsssec.n_dnssec_bogus,
TABLE_FIELD, "Indeterminate",
TABLE_UINT64, dnsssec.n_dnssec_indeterminate
);
if (r < 0)
return table_log_add_error(r);
return table_print_or_warn(table);
}
VERB(verb_reset_statistics, "reset-statistics", NULL, VERB_ANY, 1, 0,
"Reset resolver statistics");
static int verb_reset_statistics(int argc, char *argv[], uintptr_t _data, void *userdata) {
sd_json_variant *reply = NULL;
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = sd_varlink_connect_address(&vl, "/run/systemd/resolve/io.systemd.Resolve.Monitor");
if (r < 0)
return log_error_errno(r, "Failed to connect to query monitoring service /run/systemd/resolve/io.systemd.Resolve.Monitor: %m");
r = varlink_callbo_and_log(
vl,
"io.systemd.Resolve.Monitor.ResetStatistics",
&reply,
SD_JSON_BUILD_PAIR_BOOLEAN("allowInteractiveAuthentication", arg_ask_password));
if (r < 0)
return r;
if (sd_json_format_enabled(arg_json_format_flags))
return sd_json_variant_dump(reply, arg_json_format_flags, NULL, NULL);
return 0;
}
VERB(verb_flush_caches, "flush-caches", NULL, VERB_ANY, 1, 0,
"Flush all local DNS caches");
static int verb_flush_caches(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
r = bus_call_method(bus, bus_resolve_mgr, "FlushCaches", &error, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to flush caches: %s", bus_error_message(&error, r));
return 0;
}
VERB(verb_reset_server_features, "reset-server-features", NULL, VERB_ANY, 1, 0,
"Forget learnt DNS server feature levels");
static int verb_reset_server_features(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
r = bus_call_method(bus, bus_resolve_mgr, "ResetServerFeatures", &error, NULL, NULL);
if (r < 0)
return log_error_errno(r, "Failed to reset server features: %s", bus_error_message(&error, r));
return 0;
}
static int print_question(char prefix, const char *color, sd_json_variant *question) {
sd_json_variant *q = NULL;
int r;
assert(color);
JSON_VARIANT_ARRAY_FOREACH(q, question) {
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
char buf[DNS_RESOURCE_KEY_STRING_MAX];
r = dns_resource_key_from_json(q, &key);
if (r < 0) {
log_warning_errno(r, "Received monitor message with invalid question key, ignoring: %m");
continue;
}
printf("%s%s %c%s: %s\n",
color,
glyph(GLYPH_ARROW_RIGHT),
prefix,
ansi_normal(),
dns_resource_key_to_string(key, buf, sizeof(buf)));
}
return 0;
}
static int print_answer(sd_json_variant *answer) {
sd_json_variant *a;
int r;
JSON_VARIANT_ARRAY_FOREACH(a, answer) {
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
_cleanup_free_ void *d = NULL;
sd_json_variant *jraw;
const char *s;
size_t l;
jraw = sd_json_variant_by_key(a, "raw");
if (!jraw) {
log_warning("Received monitor answer lacking valid raw data, ignoring.");
continue;
}
r = sd_json_variant_unbase64(jraw, &d, &l);
if (r < 0) {
log_warning_errno(r, "Failed to undo base64 encoding of monitor answer raw data, ignoring.");
continue;
}
r = dns_resource_record_new_from_raw(&rr, d, l);
if (r < 0) {
log_warning_errno(r, "Failed to parse monitor answer RR, ignoring: %m");
continue;
}
s = dns_resource_record_to_string(rr);
if (!s)
return log_oom();
printf("%s%s A%s: %s\n",
ansi_highlight_yellow(),
glyph(GLYPH_ARROW_LEFT),
ansi_normal(),
s);
}
return 0;
}
typedef struct MonitorQueryParams {
sd_json_variant *question;
sd_json_variant *answer;
sd_json_variant *collected_questions;
int rcode;
int error;
int ede_code;
const char *state;
const char *result;
const char *ede_msg;
} MonitorQueryParams;
static void monitor_query_params_done(MonitorQueryParams *p) {
assert(p);
sd_json_variant_unref(p->question);
sd_json_variant_unref(p->answer);
sd_json_variant_unref(p->collected_questions);
}
static void monitor_query_dump(sd_json_variant *v) {
static const sd_json_dispatch_field dispatch_table[] = {
{ "question", SD_JSON_VARIANT_ARRAY, sd_json_dispatch_variant, offsetof(MonitorQueryParams, question), SD_JSON_MANDATORY },
{ "answer", SD_JSON_VARIANT_ARRAY, sd_json_dispatch_variant, offsetof(MonitorQueryParams, answer), 0 },
{ "collectedQuestions", SD_JSON_VARIANT_ARRAY, sd_json_dispatch_variant, offsetof(MonitorQueryParams, collected_questions), 0 },
{ "state", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(MonitorQueryParams, state), SD_JSON_MANDATORY },
{ "result", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(MonitorQueryParams, result), 0 },
{ "rcode", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_int, offsetof(MonitorQueryParams, rcode), 0 },
{ "errno", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_int, offsetof(MonitorQueryParams, error), 0 },
{ "extendedDNSErrorCode", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_int, offsetof(MonitorQueryParams, ede_code), 0 },
{ "extendedDNSErrorMessage", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(MonitorQueryParams, ede_msg), 0 },
{}
};
_cleanup_(monitor_query_params_done) MonitorQueryParams p = {
.rcode = -1,
.ede_code = -1,
};
assert(v);
if (sd_json_dispatch(v, dispatch_table, SD_JSON_LOG|SD_JSON_ALLOW_EXTENSIONS, &p) < 0)
return;
/* First show the current question */
print_question('Q', ansi_highlight_cyan(), p.question);
/* And then show the questions that led to this one in case this was a CNAME chain */
print_question('C', ansi_highlight_grey(), p.collected_questions);
printf("%s%s S%s: %s",
streq_ptr(p.state, "success") ? ansi_highlight_green() : ansi_highlight_red(),
glyph(GLYPH_ARROW_LEFT),
ansi_normal(),
streq_ptr(p.state, "errno") ? ERRNO_NAME(p.error) :
streq_ptr(p.state, "rcode-failure") ? strna(dns_rcode_to_string(p.rcode)) :
strna(p.state));
if (!isempty(p.result))
printf(": %s", p.result);
if (p.ede_code >= 0)
printf(" (%s%s%s)",
FORMAT_DNS_EDE_RCODE(p.ede_code),
!isempty(p.ede_msg) ? ": " : "",
strempty(p.ede_msg));
puts("");
print_answer(p.answer);
}
static int monitor_reply(
sd_varlink *link,
sd_json_variant *parameters,
const char *error_id,
sd_varlink_reply_flags_t flags,
void *userdata) {
assert(link);
if (error_id) {
bool disconnect;
disconnect = streq(error_id, SD_VARLINK_ERROR_DISCONNECTED);
if (disconnect)
log_info("Disconnected.");
else
log_error("Varlink error: %s", error_id);
(void) sd_event_exit(ASSERT_PTR(sd_varlink_get_event(link)), disconnect ? EXIT_SUCCESS : EXIT_FAILURE);
return 0;
}
if (sd_json_variant_by_key(parameters, "ready")) {
/* The first message coming in will just indicate that we are now subscribed. We let our
* caller know if they asked for it. Once the caller sees this they should know that we are
* not going to miss any queries anymore. */
(void) sd_notify(/* unset_environment=false */ false, "READY=1");
return 0;
}
if (!sd_json_format_enabled(arg_json_format_flags)) {
monitor_query_dump(parameters);
printf("\n");
} else
sd_json_variant_dump(parameters, arg_json_format_flags, NULL, NULL);
fflush(stdout);
return 0;
}
VERB(verb_monitor, "monitor", NULL, VERB_ANY, 1, 0,
"Monitor DNS queries");
static int verb_monitor(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_event_unrefp) sd_event *event = NULL;
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
int r, c;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = sd_event_default(&event);
if (r < 0)
return log_error_errno(r, "Failed to get event loop: %m");
r = sd_event_set_signal_exit(event, true);
if (r < 0)
return log_error_errno(r, "Failed to enable exit on SIGINT/SIGTERM: %m");
r = sd_varlink_connect_address(&vl, "/run/systemd/resolve/io.systemd.Resolve.Monitor");
if (r < 0)
return log_error_errno(r, "Failed to connect to query monitoring service /run/systemd/resolve/io.systemd.Resolve.Monitor: %m");
r = sd_varlink_set_relative_timeout(vl, USEC_INFINITY); /* We want the monitor to run basically forever */
if (r < 0)
return log_error_errno(r, "Failed to set varlink timeout: %m");
r = sd_varlink_attach_event(vl, event, SD_EVENT_PRIORITY_NORMAL);
if (r < 0)
return log_error_errno(r, "Failed to attach varlink connection to event loop: %m");
r = sd_varlink_bind_reply(vl, monitor_reply);
if (r < 0)
return log_error_errno(r, "Failed to bind reply callback to varlink connection: %m");
r = sd_varlink_observebo(
vl,
"io.systemd.Resolve.Monitor.SubscribeQueryResults",
SD_JSON_BUILD_PAIR_BOOLEAN("allowInteractiveAuthentication", arg_ask_password));
if (r < 0)
return log_error_errno(r, "Failed to issue SubscribeQueryResults() varlink call: %m");
r = sd_event_loop(event);
if (r < 0)
return log_error_errno(r, "Failed to run event loop: %m");
r = sd_event_get_exit_code(event, &c);
if (r < 0)
return log_error_errno(r, "Failed to get exit code: %m");
return c;
}
static int call_dns(sd_bus *bus, char **dns, const BusLocator *locator, sd_bus_error *error, bool extended) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_message_new_method_call(bus, &req, locator, extended ? "SetLinkDNSEx" : "SetLinkDNS");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "i", arg_ifindex);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(req, 'a', extended ? "(iayqs)" : "(iay)");
if (r < 0)
return bus_log_create_error(r);
/* If only argument is the empty string, then call SetLinkDNS() with an
* empty list, which will clear the list of domains for an interface. */
if (!strv_equal(dns, STRV_MAKE("")))
STRV_FOREACH(p, dns) {
_cleanup_free_ char *name = NULL;
struct in_addr_data data;
uint16_t port;
int ifindex;
r = in_addr_port_ifindex_name_from_string_auto(*p, &data.family, &data.address, &port, &ifindex, &name);
if (r < 0)
return log_error_errno(r, "Failed to parse DNS server address: %s", *p);
if (ifindex != 0 && ifindex != arg_ifindex)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid ifindex: %i", ifindex);
r = sd_bus_message_open_container(req, 'r', extended ? "iayqs" : "iay");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "i", data.family);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append_array(req, 'y', &data.address, FAMILY_ADDRESS_SIZE(data.family));
if (r < 0)
return bus_log_create_error(r);
if (extended) {
r = sd_bus_message_append(req, "q", port);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "s", name);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(req);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(req);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_call(bus, req, 0, error, NULL);
if (r < 0 && extended && sd_bus_error_has_name(error, SD_BUS_ERROR_UNKNOWN_METHOD)) {
sd_bus_error_free(error);
return call_dns(bus, dns, locator, error, false);
}
return r;
}
static int dump_cache_item(sd_json_variant *item) {
struct item_info {
sd_json_variant *key;
sd_json_variant *rrs;
const char *type;
uint64_t until;
} item_info = {};
static const sd_json_dispatch_field dispatch_table[] = {
{ "key", SD_JSON_VARIANT_OBJECT, sd_json_dispatch_variant_noref, offsetof(struct item_info, key), SD_JSON_MANDATORY },
{ "rrs", SD_JSON_VARIANT_ARRAY, sd_json_dispatch_variant_noref, offsetof(struct item_info, rrs), 0 },
{ "type", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct item_info, type), 0 },
{ "until", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct item_info, until), 0 },
{},
};
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *k = NULL;
int r, c = 0;
r = sd_json_dispatch(item, dispatch_table, SD_JSON_LOG|SD_JSON_ALLOW_EXTENSIONS, &item_info);
if (r < 0)
return r;
r = dns_resource_key_from_json(item_info.key, &k);
if (r < 0)
return log_error_errno(r, "Failed to turn JSON data to resource key: %m");
if (item_info.type)
printf("%s %s%s%s\n", DNS_RESOURCE_KEY_TO_STRING(k), ansi_highlight_red(), item_info.type, ansi_normal());
else {
sd_json_variant *i;
JSON_VARIANT_ARRAY_FOREACH(i, item_info.rrs) {
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
_cleanup_free_ void *data = NULL;
sd_json_variant *raw;
size_t size;
raw = sd_json_variant_by_key(i, "raw");
if (!raw)
return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE), "raw field missing from RR JSON data.");
r = sd_json_variant_unbase64(raw, &data, &size);
if (r < 0)
return log_error_errno(r, "Unable to decode raw RR JSON data: %m");
r = dns_resource_record_new_from_raw(&rr, data, size);
if (r < 0)
return log_error_errno(r, "Failed to parse DNS data: %m");
printf("%s\n", dns_resource_record_to_string(rr));
c++;
}
}
return c;
}
static int dump_cache_scope(sd_json_variant *scope) {
struct scope_info {
const char *protocol;
int family;
int ifindex;
const char *ifname;
sd_json_variant *cache;
const char *dnssec_mode;
const char *dns_over_tls_mode;
} scope_info = {
.family = AF_UNSPEC,
};
sd_json_variant *i;
int r, c = 0;
static const sd_json_dispatch_field dispatch_table[] = {
{ "protocol", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct scope_info, protocol), SD_JSON_MANDATORY },
{ "family", _SD_JSON_VARIANT_TYPE_INVALID, json_dispatch_address_family, offsetof(struct scope_info, family), SD_JSON_RELAX },
{ "ifindex", _SD_JSON_VARIANT_TYPE_INVALID, json_dispatch_ifindex, offsetof(struct scope_info, ifindex), SD_JSON_RELAX },
{ "ifname", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct scope_info, ifname), 0 },
{ "cache", SD_JSON_VARIANT_ARRAY, sd_json_dispatch_variant_noref, offsetof(struct scope_info, cache), SD_JSON_MANDATORY },
{ "dnssec", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct scope_info, dnssec_mode), 0 },
{ "dnsOverTLS", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct scope_info, dns_over_tls_mode), 0 },
{},
};
r = sd_json_dispatch(scope, dispatch_table, SD_JSON_LOG|SD_JSON_ALLOW_EXTENSIONS, &scope_info);
if (r < 0)
return r;
printf("%sScope protocol=%s", ansi_underline(), scope_info.protocol);
if (scope_info.family != AF_UNSPEC)
printf(" family=%s", af_to_name(scope_info.family));
if (scope_info.ifindex > 0)
printf(" ifindex=%i", scope_info.ifindex);
if (scope_info.ifname)
printf(" ifname=%s", scope_info.ifname);
if (dns_protocol_from_string(scope_info.protocol) == DNS_PROTOCOL_DNS) {
if (scope_info.dnssec_mode)
printf(" DNSSEC=%s", scope_info.dnssec_mode);
if (scope_info.dns_over_tls_mode)
printf(" DNSOverTLS=%s", scope_info.dns_over_tls_mode);
}
printf("%s\n", ansi_normal());
JSON_VARIANT_ARRAY_FOREACH(i, scope_info.cache) {
r = dump_cache_item(i);
if (r < 0)
return r;
c += r;
}
if (c == 0)
printf("%sNo entries.%s\n\n", ansi_grey(), ansi_normal());
else
printf("\n");
return 0;
}
VERB(verb_show_cache, "show-cache", NULL, VERB_ANY, 1, 0,
"Show cache contents");
static int verb_show_cache(int argc, char *argv[], uintptr_t _data, void *userdata) {
sd_json_variant *reply = NULL, *d = NULL;
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = sd_varlink_connect_address(&vl, "/run/systemd/resolve/io.systemd.Resolve.Monitor");
if (r < 0)
return log_error_errno(r, "Failed to connect to query monitoring service /run/systemd/resolve/io.systemd.Resolve.Monitor: %m");
r = varlink_callbo_and_log(
vl,
"io.systemd.Resolve.Monitor.DumpCache",
&reply,
SD_JSON_BUILD_PAIR_BOOLEAN("allowInteractiveAuthentication", arg_ask_password));
if (r < 0)
return r;
d = sd_json_variant_by_key(reply, "dump");
if (!d)
return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),
"DumpCache() response is missing 'dump' key.");
if (!sd_json_variant_is_array(d))
return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),
"DumpCache() response 'dump' field not an array");
if (!sd_json_format_enabled(arg_json_format_flags)) {
sd_json_variant *i;
JSON_VARIANT_ARRAY_FOREACH(i, d) {
r = dump_cache_scope(i);
if (r < 0)
return r;
}
return 0;
}
return sd_json_variant_dump(d, arg_json_format_flags, NULL, NULL);
}
static int dump_server_state(sd_json_variant *server) {
_cleanup_(table_unrefp) Table *table = NULL;
TableCell *cell;
struct server_state {
const char *server_name;
const char *type;
const char *ifname;
int ifindex;
const char *verified_feature_level;
const char *possible_feature_level;
const char *dnssec_mode;
bool dnssec_supported;
size_t received_udp_fragment_max;
uint64_t n_failed_udp;
uint64_t n_failed_tcp;
bool packet_truncated;
bool packet_bad_opt;
bool packet_rrsig_missing;
bool packet_invalid;
bool packet_do_off;
} server_state = {
.ifindex = -1,
};
int r;
static const sd_json_dispatch_field dispatch_table[] = {
{ "Server", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct server_state, server_name), SD_JSON_MANDATORY },
{ "Type", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct server_state, type), SD_JSON_MANDATORY },
{ "Interface", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct server_state, ifname), 0 },
{ "InterfaceIndex", _SD_JSON_VARIANT_TYPE_INVALID, json_dispatch_ifindex, offsetof(struct server_state, ifindex), SD_JSON_RELAX },
{ "VerifiedFeatureLevel", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct server_state, verified_feature_level), 0 },
{ "PossibleFeatureLevel", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct server_state, possible_feature_level), 0 },
{ "DNSSECMode", SD_JSON_VARIANT_STRING, sd_json_dispatch_const_string, offsetof(struct server_state, dnssec_mode), SD_JSON_MANDATORY },
{ "DNSSECSupported", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(struct server_state, dnssec_supported), SD_JSON_MANDATORY },
{ "ReceivedUDPFragmentMax", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct server_state, received_udp_fragment_max), SD_JSON_MANDATORY },
{ "FailedUDPAttempts", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct server_state, n_failed_udp), SD_JSON_MANDATORY },
{ "FailedTCPAttempts", _SD_JSON_VARIANT_TYPE_INVALID, sd_json_dispatch_uint64, offsetof(struct server_state, n_failed_tcp), SD_JSON_MANDATORY },
{ "PacketTruncated", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(struct server_state, packet_truncated), SD_JSON_MANDATORY },
{ "PacketBadOpt", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(struct server_state, packet_bad_opt), SD_JSON_MANDATORY },
{ "PacketRRSIGMissing", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(struct server_state, packet_rrsig_missing), SD_JSON_MANDATORY },
{ "PacketInvalid", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(struct server_state, packet_invalid), SD_JSON_MANDATORY },
{ "PacketDoOff", SD_JSON_VARIANT_BOOLEAN, sd_json_dispatch_stdbool, offsetof(struct server_state, packet_do_off), SD_JSON_MANDATORY },
{},
};
r = sd_json_dispatch(server, dispatch_table, SD_JSON_LOG|SD_JSON_ALLOW_EXTENSIONS, &server_state);
if (r < 0)
return r;
table = table_new_vertical();
if (!table)
return log_oom();
assert_se(cell = table_get_cell(table, 0, 0));
(void) table_set_ellipsize_percent(table, cell, 100);
(void) table_set_align_percent(table, cell, 0);
r = table_add_cell_stringf(table, NULL, "Server: %s", server_state.server_name);
if (r < 0)
return table_log_add_error(r);
r = table_add_many(table,
TABLE_EMPTY,
TABLE_FIELD, "Type",
TABLE_SET_ALIGN_PERCENT, 100,
TABLE_STRING, server_state.type);
if (r < 0)
return table_log_add_error(r);
if (server_state.ifname) {
r = table_add_many(table,
TABLE_FIELD, "Interface",
TABLE_STRING, server_state.ifname);
if (r < 0)
return table_log_add_error(r);
}
if (server_state.ifindex >= 0) {
r = table_add_many(table,
TABLE_FIELD, "Interface Index",
TABLE_INT, server_state.ifindex);
if (r < 0)
return table_log_add_error(r);
}
if (server_state.verified_feature_level) {
r = table_add_many(table,
TABLE_FIELD, "Verified feature level",
TABLE_STRING, server_state.verified_feature_level);
if (r < 0)
return table_log_add_error(r);
}
if (server_state.possible_feature_level) {
r = table_add_many(table,
TABLE_FIELD, "Possible feature level",
TABLE_STRING, server_state.possible_feature_level);
if (r < 0)
return table_log_add_error(r);
}
r = table_add_many(table,
TABLE_FIELD, "DNSSEC Mode",
TABLE_STRING, server_state.dnssec_mode,
TABLE_FIELD, "DNSSEC Supported",
TABLE_STRING, yes_no(server_state.dnssec_supported),
TABLE_FIELD, "Maximum UDP fragment size received",
TABLE_UINT64, server_state.received_udp_fragment_max,
TABLE_FIELD, "Failed UDP attempts",
TABLE_UINT64, server_state.n_failed_udp,
TABLE_FIELD, "Failed TCP attempts",
TABLE_UINT64, server_state.n_failed_tcp,
TABLE_FIELD, "Seen truncated packet",
TABLE_STRING, yes_no(server_state.packet_truncated),
TABLE_FIELD, "Seen OPT RR getting lost",
TABLE_STRING, yes_no(server_state.packet_bad_opt),
TABLE_FIELD, "Seen RRSIG RR missing",
TABLE_STRING, yes_no(server_state.packet_rrsig_missing),
TABLE_FIELD, "Seen invalid packet",
TABLE_STRING, yes_no(server_state.packet_invalid),
TABLE_FIELD, "Server dropped DO flag",
TABLE_STRING, yes_no(server_state.packet_do_off),
TABLE_SET_ALIGN_PERCENT, 0,
TABLE_EMPTY, TABLE_EMPTY);
if (r < 0)
return table_log_add_error(r);
return table_print_or_warn(table);
}
VERB(verb_show_server_state, "show-server-state", NULL, VERB_ANY, 1, 0,
"Show servers state");
static int verb_show_server_state(int argc, char *argv[], uintptr_t _data, void *userdata) {
sd_json_variant *reply = NULL, *d = NULL;
_cleanup_(sd_varlink_unrefp) sd_varlink *vl = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = sd_varlink_connect_address(&vl, "/run/systemd/resolve/io.systemd.Resolve.Monitor");
if (r < 0)
return log_error_errno(r, "Failed to connect to query monitoring service /run/systemd/resolve/io.systemd.Resolve.Monitor: %m");
r = varlink_callbo_and_log(
vl,
"io.systemd.Resolve.Monitor.DumpServerState",
&reply,
SD_JSON_BUILD_PAIR_BOOLEAN("allowInteractiveAuthentication", arg_ask_password));
if (r < 0)
return r;
d = sd_json_variant_by_key(reply, "dump");
if (!d)
return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),
"DumpCache() response is missing 'dump' key.");
if (!sd_json_variant_is_array(d))
return log_error_errno(SYNTHETIC_ERRNO(ENOTRECOVERABLE),
"DumpCache() response 'dump' field not an array");
if (!sd_json_format_enabled(arg_json_format_flags)) {
sd_json_variant *i;
JSON_VARIANT_ARRAY_FOREACH(i, d) {
r = dump_server_state(i);
if (r < 0)
return r;
}
return 0;
}
return sd_json_variant_dump(d, arg_json_format_flags, NULL, NULL);
}
VERB(verb_dns, "dns", "[LINK [SERVER…]]", VERB_ANY, VERB_ANY, 0,
"Get/set per-interface DNS server address");
static int verb_dns(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_DNS);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_DNS);
char **args = strv_skip(argv, 2);
r = call_dns(bus, args, bus_resolve_mgr, &error, true);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = call_dns(bus, args, bus_network_mgr, &error, true);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set DNS configuration: %s", bus_error_message(&error, r));
}
return 0;
}
static int call_domain(sd_bus *bus, char **domain, const BusLocator *locator, sd_bus_error *error) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_message_new_method_call(bus, &req, locator, "SetLinkDomains");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "i", arg_ifindex);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(req, 'a', "(sb)");
if (r < 0)
return bus_log_create_error(r);
/* If only argument is the empty string, then call SetLinkDomains() with an
* empty list, which will clear the list of domains for an interface. */
if (!strv_equal(domain, STRV_MAKE("")))
STRV_FOREACH(p, domain) {
const char *n;
n = **p == '~' ? *p + 1 : *p;
r = dns_name_is_valid(n);
if (r < 0)
return log_error_errno(r, "Failed to validate specified domain %s: %m", n);
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Domain not valid: %s",
n);
r = sd_bus_message_append(req, "(sb)", n, **p == '~');
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(req);
if (r < 0)
return bus_log_create_error(r);
return sd_bus_call(bus, req, 0, error, NULL);
}
VERB(verb_domain, "domain", "[LINK [DOMAIN…]]", VERB_ANY, VERB_ANY, 0,
"Get/set per-interface search domain");
static int verb_domain(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_DOMAIN);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_DOMAIN);
char **args = strv_skip(argv, 2);
r = call_domain(bus, args, bus_resolve_mgr, &error);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = call_domain(bus, args, bus_network_mgr, &error);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set domain configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_default_route, "default-route", "[LINK [BOOL]]", VERB_ANY, 3, 0,
"Get/set per-interface default route flag");
static int verb_default_route(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r, b;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_DEFAULT_ROUTE);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_DEFAULT_ROUTE);
b = parse_boolean(argv[2]);
if (b < 0)
return log_error_errno(b, "Failed to parse boolean argument: %s", argv[2]);
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_call_method(bus, bus_resolve_mgr, "SetLinkDefaultRoute", &error, NULL, "ib", arg_ifindex, b);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = bus_call_method(bus, bus_network_mgr, "SetLinkDefaultRoute", &error, NULL, "ib", arg_ifindex, b);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set default route configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_llmnr, "llmnr", "[LINK [MODE]]", VERB_ANY, 3, 0,
"Get/set per-interface LLMNR mode");
static int verb_llmnr(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_free_ char *global_llmnr_support_str = NULL;
ResolveSupport global_llmnr_support, llmnr_support;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_LLMNR);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_LLMNR);
llmnr_support = resolve_support_from_string(argv[2]);
if (llmnr_support < 0)
return log_error_errno(llmnr_support, "Invalid LLMNR setting: %s", argv[2]);
r = bus_get_property_string(bus, bus_resolve_mgr, "LLMNR", &error, &global_llmnr_support_str);
if (r < 0)
return log_error_errno(r, "Failed to get the global LLMNR support state: %s", bus_error_message(&error, r));
global_llmnr_support = resolve_support_from_string(global_llmnr_support_str);
if (global_llmnr_support < 0)
return log_error_errno(global_llmnr_support, "Received invalid global LLMNR setting: %s", global_llmnr_support_str);
if (global_llmnr_support < llmnr_support)
log_warning("Setting LLMNR support level \"%s\" for \"%s\", but the global support level is \"%s\".",
argv[2], arg_ifname, global_llmnr_support_str);
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_call_method(bus, bus_resolve_mgr, "SetLinkLLMNR", &error, NULL, "is", arg_ifindex, argv[2]);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = bus_call_method(bus, bus_network_mgr, "SetLinkLLMNR", &error, NULL, "is", arg_ifindex, argv[2]);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set LLMNR configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_mdns, "mdns", "[LINK [MODE]]", VERB_ANY, 3, 0,
"Get/set per-interface MulticastDNS mode");
static int verb_mdns(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_free_ char *global_mdns_support_str = NULL;
ResolveSupport global_mdns_support, mdns_support;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_MDNS);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_MDNS);
mdns_support = resolve_support_from_string(argv[2]);
if (mdns_support < 0)
return log_error_errno(mdns_support, "Invalid mDNS setting: %s", argv[2]);
r = bus_get_property_string(bus, bus_resolve_mgr, "MulticastDNS", &error, &global_mdns_support_str);
if (r < 0)
return log_error_errno(r, "Failed to get the global mDNS support state: %s", bus_error_message(&error, r));
global_mdns_support = resolve_support_from_string(global_mdns_support_str);
if (global_mdns_support < 0)
return log_error_errno(global_mdns_support, "Received invalid global mDNS setting: %s", global_mdns_support_str);
if (global_mdns_support < mdns_support)
log_warning("Setting mDNS support level \"%s\" for \"%s\", but the global support level is \"%s\".",
argv[2], arg_ifname, global_mdns_support_str);
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_call_method(bus, bus_resolve_mgr, "SetLinkMulticastDNS", &error, NULL, "is", arg_ifindex, argv[2]);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = bus_call_method(
bus,
bus_network_mgr,
"SetLinkMulticastDNS",
&error,
NULL,
"is", arg_ifindex, argv[2]);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set MulticastDNS configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_dns_over_tls, "dnsovertls", "[LINK [MODE]]", VERB_ANY, 3, 0,
"Get/set per-interface DNS-over-TLS mode");
static int verb_dns_over_tls(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_DNS_OVER_TLS);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_DNS_OVER_TLS);
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_call_method(bus, bus_resolve_mgr, "SetLinkDNSOverTLS", &error, NULL, "is", arg_ifindex, argv[2]);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = bus_call_method(
bus,
bus_network_mgr,
"SetLinkDNSOverTLS",
&error,
NULL,
"is", arg_ifindex, argv[2]);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set DNSOverTLS configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_dnssec, "dnssec", "[LINK [MODE]]", VERB_ANY, 3, 0,
"Get/set per-interface DNSSEC mode");
static int verb_dnssec(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_DNSSEC);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_DNSSEC);
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_call_method(bus, bus_resolve_mgr, "SetLinkDNSSEC", &error, NULL, "is", arg_ifindex, argv[2]);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = bus_call_method(bus, bus_network_mgr, "SetLinkDNSSEC", &error, NULL, "is", arg_ifindex, argv[2]);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set DNSSEC configuration: %s", bus_error_message(&error, r));
}
return 0;
}
static int call_nta(sd_bus *bus, char **nta, const BusLocator *locator, sd_bus_error *error) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *req = NULL;
int r;
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_message_new_method_call(bus, &req, locator, "SetLinkDNSSECNegativeTrustAnchors");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(req, "i", arg_ifindex);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append_strv(req, nta);
if (r < 0)
return bus_log_create_error(r);
return sd_bus_call(bus, req, 0, error, NULL);
}
VERB(verb_nta, "nta", "[LINK [DOMAIN…]]", VERB_ANY, VERB_ANY, 0,
"Get/set per-interface DNSSEC NTA");
static int verb_nta(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
char **args;
bool clear;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return status_all(STATUS_NTA);
if (argc < 3)
return status_ifindex(arg_ifindex, STATUS_NTA);
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
/* If only argument is the empty string, then call SetLinkDNSSECNegativeTrustAnchors()
* with an empty list, which will clear the list of domains for an interface. */
args = strv_skip(argv, 2);
clear = strv_equal(args, STRV_MAKE(""));
if (!clear)
STRV_FOREACH(p, args) {
r = dns_name_is_valid(*p);
if (r < 0)
return log_error_errno(r, "Failed to validate specified domain %s: %m", *p);
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Domain not valid: %s",
*p);
}
r = call_nta(bus, clear ? NULL : args, bus_resolve_mgr, &error);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = call_nta(bus, clear ? NULL : args, bus_network_mgr, &error);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to set DNSSEC NTA configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_revert_link, "revert", "LINK", VERB_ANY, 2, 0,
"Revert per-interface configuration");
static int verb_revert_link(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
if (argc >= 2) {
r = ifname_mangle(argv[1]);
if (r < 0)
return r;
}
if (arg_ifindex <= 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Interface argument required.");
(void) polkit_agent_open_if_enabled(BUS_TRANSPORT_LOCAL, arg_ask_password);
r = bus_call_method(bus, bus_resolve_mgr, "RevertLink", &error, NULL, "i", arg_ifindex);
if (r < 0 && sd_bus_error_has_name(&error, BUS_ERROR_LINK_BUSY)) {
sd_bus_error_free(&error);
r = bus_call_method(bus, bus_network_mgr, "RevertLinkDNS", &error, NULL, "i", arg_ifindex);
}
if (r < 0) {
if (arg_ifindex_permissive &&
sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_LINK))
return 0;
return log_error_errno(r, "Failed to revert interface configuration: %s", bus_error_message(&error, r));
}
return 0;
}
VERB(verb_log_level, "log-level", "[LEVEL]", VERB_ANY, 2, 0,
"Get/set logging threshold for systemd-resolved");
static int verb_log_level(int argc, char *argv[], uintptr_t _data, void *userdata) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
r = acquire_bus(&bus);
if (r < 0)
return r;
assert(IN_SET(argc, 1, 2));
return verb_log_control_common(bus, "org.freedesktop.resolve1", argv[0], argc == 2 ? argv[1] : NULL);
}
static int parse_protocol(const char *arg) {
if (streq(arg, "help")) {
if (arg_legend)
puts("Known protocol types:");
puts("dns\n"
"llmnr\n"
"llmnr-ipv4\n"
"llmnr-ipv6\n"
"mdns\n"
"mdns-ipv4\n"
"mdns-ipv6");
return 0;
}
if (streq(arg, "dns"))
arg_flags |= SD_RESOLVED_DNS;
else if (streq(arg, "llmnr"))
arg_flags |= SD_RESOLVED_LLMNR;
else if (streq(arg, "llmnr-ipv4"))
arg_flags |= SD_RESOLVED_LLMNR_IPV4;
else if (streq(arg, "llmnr-ipv6"))
arg_flags |= SD_RESOLVED_LLMNR_IPV6;
else if (streq(arg, "mdns"))
arg_flags |= SD_RESOLVED_MDNS;
else if (streq(arg, "mdns-ipv4"))
arg_flags |= SD_RESOLVED_MDNS_IPV4;
else if (streq(arg, "mdns-ipv6"))
arg_flags |= SD_RESOLVED_MDNS_IPV6;
else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unknown protocol specifier: %s", arg);
return 1;
}
static void help_dns_types(void) {
if (arg_legend)
puts("Known DNS RR types:");
DUMP_STRING_TABLE(dns_type, int, _DNS_TYPE_MAX);
}
static void help_dns_classes(void) {
if (arg_legend)
puts("Known DNS RR classes:");
DUMP_STRING_TABLE(dns_class, int, _DNS_CLASS_MAX);
}
VERB_COMMON_HELP_AUTO_HIDDEN("resolvectl");
COMMAND(
"systemd-resolve\0",
"This command is deprecated. Use resolvectl.1 instead.",
.man_pages = "resolvectl.1\0",
.option_namespace = "systemd-resolve",
.pager_flags = &arg_pager_flags,
);
static int compat_parse_argv(int argc, char *argv[], char ***remaining_args) {
int r;
assert(argc >= 0);
assert(argv);
assert(remaining_args);
OptionParser opts = { argc, argv, .namespace = "systemd-resolve" };
FOREACH_OPTION_OR_RETURN(c, &opts)
switch (c) {
OPTION_NAMESPACE("systemd-resolve"): {}
OPTION_COMMON_HELP:
printf("systemd-resolve is deprecated. Call resolvectl instead.\n");
return 0;
OPTION_COMMON_VERSION:
return version();
OPTION_SHORT('4', NULL, "Resolve IPv4 addresses"):
arg_family = AF_INET;
break;
OPTION_SHORT('6', NULL, "Resolve IPv6 addresses"):
arg_family = AF_INET6;
break;
OPTION('i', "interface", "INTERFACE", "Look on interface"):
r = ifname_mangle(opts.arg);
if (r < 0)
return r;
break;
OPTION('p', "protocol", "PROTO|help", "Look via protocol"):
r = parse_protocol(opts.arg);
if (r <= 0)
return r;
break;
OPTION('t', "type", "TYPE|help", "Query RR with DNS type"):
if (streq(opts.arg, "help")) {
help_dns_types();
return 0;
}
r = dns_type_from_string(opts.arg);
if (r < 0)
return log_error_errno(r, "Failed to parse RR record type %s: %m", opts.arg);
arg_type = (uint16_t) r;
assert((int) arg_type == r);
arg_mode = MODE_RESOLVE_RECORD;
break;
OPTION('c', "class", "CLASS|help", "Query RR with DNS class"):
if (streq(opts.arg, "help")) {
help_dns_classes();
return 0;
}
r = dns_class_from_string(opts.arg);
if (r < 0)
return log_error_errno(r, "Failed to parse RR record class %s: %m", opts.arg);
arg_class = (uint16_t) r;
assert((int) arg_class == r);
break;
OPTION_LONG("service", NULL, "Resolve service (SRV)"):
arg_mode = MODE_RESOLVE_SERVICE;
break;
OPTION_LONG("service-address", "BOOL", "Resolve address for services (default: yes)"):
r = parse_boolean_argument("--service-address=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_ADDRESS, r == 0);
break;
OPTION_LONG("service-txt", "BOOL", "Resolve TXT records for services (default: yes)"):
r = parse_boolean_argument("--service-txt=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_TXT, r == 0);
arg_service_txt_set = true;
break;
OPTION_LONG("openpgp", NULL, "Query OpenPGP public key"):
arg_mode = MODE_RESOLVE_OPENPGP;
break;
OPTION_LONG_FLAGS(OPTION_OPTIONAL_ARG, "tlsa", "FAMILY", "Query TLS public key"):
arg_mode = MODE_RESOLVE_TLSA;
if (!opts.arg || service_family_is_valid(opts.arg))
arg_service_family = opts.arg;
else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unknown service family \"%s\".", opts.arg);
break;
OPTION_LONG("cname", "BOOL", "Follow CNAME redirects (default: yes)"):
r = parse_boolean_argument("--cname=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_CNAME, r == 0);
break;
OPTION_LONG("search", "BOOL", "Use search domains for single-label names (default: yes)"):
r = parse_boolean_argument("--search=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_SEARCH, r == 0);
break;
OPTION_LONG("statistics", NULL, "Show resolver statistics"):
arg_mode = MODE_STATISTICS;
break;
OPTION_LONG("reset-statistics", NULL, "Reset resolver statistics"):
arg_mode = MODE_RESET_STATISTICS;
break;
OPTION_LONG("status", NULL, "Show link and server status"):
arg_mode = MODE_STATUS;
break;
OPTION_LONG("flush-caches", NULL, "Flush all local DNS caches"):
arg_mode = MODE_FLUSH_CACHES;
break;
OPTION_LONG("reset-server-features", NULL,
"Forget learnt DNS server feature levels"):
arg_mode = MODE_RESET_SERVER_FEATURES;
break;
OPTION_LONG("set-dns", "SERVER", "Set per-interface DNS server address"):
r = strv_extend(&arg_set_dns, opts.arg);
if (r < 0)
return log_oom();
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("set-domain", "DOMAIN", "Set per-interface search domain"):
r = strv_extend(&arg_set_domain, opts.arg);
if (r < 0)
return log_oom();
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("set-llmnr", "MODE", "Set per-interface LLMNR mode"):
arg_set_llmnr = opts.arg;
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("set-mdns", "MODE", "Set per-interface MulticastDNS mode"):
arg_set_mdns = opts.arg;
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("set-dnsovertls", "MODE", "Set per-interface DNS-over-TLS mode"):
arg_set_dns_over_tls = opts.arg;
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("set-dnssec", "MODE", "Set per-interface DNSSEC mode"):
arg_set_dnssec = opts.arg;
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("set-nta", "DOMAIN", "Set per-interface DNSSEC NTA"):
r = strv_extend(&arg_set_nta, opts.arg);
if (r < 0)
return log_oom();
arg_mode = MODE_SET_LINK;
break;
OPTION_LONG("revert", NULL, "Revert per-interface configuration"):
arg_mode = MODE_REVERT_LINK;
break;
OPTION_LONG_FLAGS(OPTION_OPTIONAL_ARG, "raw", "payload|packet",
"Dump the answer as binary data"):
if (on_tty())
return log_error_errno(SYNTHETIC_ERRNO(ENOTTY),
"Refusing to write binary data to tty.");
if (opts.arg == NULL || streq(opts.arg, "payload"))
arg_raw = RAW_PAYLOAD;
else if (streq(opts.arg, "packet"))
arg_raw = RAW_PACKET;
else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unknown --raw specifier \"%s\".",
opts.arg);
arg_legend = false;
break;
OPTION_COMMON_NO_PAGER:
arg_pager_flags |= PAGER_DISABLE;
break;
OPTION_LONG("legend", "BOOL", "Print headers and additional info (default: yes)"):
r = parse_boolean_argument("--legend=", opts.arg, &arg_legend);
if (r < 0)
return r;
break;
OPTION_COMMON_INTROSPECT_CLI:
return introspect_cli(arg_json_format_flags);
}
if (arg_type == 0 && arg_class != 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--class= may only be used in conjunction with --type=.");
if (arg_type != 0 && arg_mode == MODE_RESOLVE_SERVICE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--service and --type= may not be combined.");
if (arg_type != 0 && arg_class == 0)
arg_class = DNS_CLASS_IN;
if (arg_class != 0 && arg_type == 0)
arg_type = DNS_TYPE_A;
if (IN_SET(arg_mode, MODE_SET_LINK, MODE_REVERT_LINK)) {
if (arg_ifindex <= 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--set-dns=, --set-domain=, --set-llmnr=, --set-mdns=, --set-dnsovertls=, --set-dnssec=, --set-nta= and --revert require --interface=.");
}
*remaining_args = option_parser_get_args(&opts);
return 1 /* work to do */;
}
static int native_parse_argv(int argc, char *argv[], char ***remaining_args) {
int r;
assert(argc >= 0);
assert(argv);
assert(remaining_args);
OptionParser opts = { argc, argv, .namespace = "resolvectl" };
FOREACH_OPTION_OR_RETURN(c, &opts)
switch (c) {
OPTION_NAMESPACE("resolvectl"): {}
OPTION_COMMON_HELP:
return command_print_help("resolvectl");
OPTION_COMMON_VERSION:
return version();
OPTION_SHORT('4', NULL, "Resolve IPv4 addresses"):
arg_family = AF_INET;
break;
OPTION_SHORT('6', NULL, "Resolve IPv6 addresses"):
arg_family = AF_INET6;
break;
OPTION('i', "interface", "INTERFACE", "Look on interface"):
r = ifname_mangle(opts.arg);
if (r < 0)
return r;
break;
OPTION('p', "protocol", "PROTO|help", "Look via protocol"):
r = parse_protocol(opts.arg);
if (r <= 0)
return r;
break;
OPTION('t', "type", "TYPE|help", "Query RR with DNS type"):
if (streq(opts.arg, "help")) {
help_dns_types();
return 0;
}
r = dns_type_from_string(opts.arg);
if (r < 0)
return log_error_errno(r, "Failed to parse RR record type %s: %m", opts.arg);
arg_type = (uint16_t) r;
assert((int) arg_type == r);
break;
OPTION('c', "class", "CLASS|help", "Query RR with DNS class"):
if (streq(opts.arg, "help")) {
help_dns_classes();
return 0;
}
r = dns_class_from_string(opts.arg);
if (r < 0)
return log_error_errno(r, "Failed to parse RR record class %s: %m", opts.arg);
arg_class = (uint16_t) r;
assert((int) arg_class == r);
break;
OPTION_LONG("service-address", "BOOL", "Resolve address for services (default: yes)"):
r = parse_boolean_argument("--service-address=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_ADDRESS, r == 0);
break;
OPTION_LONG("service-txt", "BOOL", "Resolve TXT records for services (default: yes)"):
r = parse_boolean_argument("--service-txt=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_TXT, r == 0);
arg_service_txt_set = true;
break;
OPTION_LONG("cname", "BOOL", "Follow CNAME redirects (default: yes)"):
r = parse_boolean_argument("--cname=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_CNAME, r == 0);
break;
OPTION_LONG("validate", "BOOL", "Allow DNSSEC validation (default: yes)"):
r = parse_boolean_argument("--validate=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_VALIDATE, r == 0);
break;
OPTION_LONG("synthesize", "BOOL", "Allow synthetic response (default: yes)"):
r = parse_boolean_argument("--synthesize=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_SYNTHESIZE, r == 0);
break;
OPTION_LONG("cache", "BOOL", "Allow response from cache (default: yes)"):
r = parse_boolean_argument("--cache=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_CACHE, r == 0);
break;
OPTION_LONG("stale-data", "BOOL",
"Allow response from cache with stale data (default: yes)"):
r = parse_boolean_argument("--stale-data=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_STALE, r == 0);
break;
OPTION_LONG("relax-single-label", "BOOL",
"Allow single label lookups to go upstream (default: no)"):
r = parse_boolean_argument("--relax-single-label=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_RELAX_SINGLE_LABEL, r > 0);
break;
OPTION_LONG("zone", "BOOL",
"Allow response from locally registered mDNS/LLMNR records (default: yes)"):
r = parse_boolean_argument("--zone=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_ZONE, r == 0);
break;
OPTION_LONG("trust-anchor", "BOOL",
"Allow response from local trust anchor (default: yes)"):
r = parse_boolean_argument("--trust-anchor=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_TRUST_ANCHOR, r == 0);
break;
OPTION_LONG("network", "BOOL", "Allow response from network (default: yes)"):
r = parse_boolean_argument("--network=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_NETWORK, r == 0);
break;
OPTION_LONG("search", "BOOL", "Use search domains for single-label names (default: yes)"):
r = parse_boolean_argument("--search=", opts.arg, NULL);
if (r < 0)
return r;
SET_FLAG(arg_flags, SD_RESOLVED_NO_SEARCH, r == 0);
break;
OPTION_LONG_FLAGS(OPTION_OPTIONAL_ARG, "raw", "payload|packet",
"Dump the answer as binary data"):
if (on_tty())
return log_error_errno(SYNTHETIC_ERRNO(ENOTTY),
"Refusing to write binary data to tty.");
if (opts.arg == NULL || streq(opts.arg, "payload"))
arg_raw = RAW_PAYLOAD;
else if (streq(opts.arg, "packet"))
arg_raw = RAW_PACKET;
else
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Unknown --raw specifier \"%s\".",
opts.arg);
arg_legend = false;
break;
OPTION_COMMON_NO_PAGER:
arg_pager_flags |= PAGER_DISABLE;
break;
OPTION_COMMON_NO_ASK_PASSWORD:
arg_ask_password = false;
break;
OPTION_LONG("legend", "BOOL", "Print headers and additional info (default: yes)"):
r = parse_boolean_argument("--legend=", opts.arg, &arg_legend);
if (r < 0)
return r;
break;
OPTION_COMMON_JSON:
r = parse_json_argument(opts.arg, &arg_json_format_flags);
if (r <= 0)
return r;
break;
OPTION_COMMON_LOWERCASE_J:
arg_json_format_flags = SD_JSON_FORMAT_PRETTY_AUTO|SD_JSON_FORMAT_COLOR_AUTO;
break;
OPTION_COMMON_INTROSPECT_CLI:
return introspect_cli(arg_json_format_flags);
}
if (arg_raw != RAW_NONE && sd_json_format_enabled(arg_json_format_flags))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--raw and --json= may not be combined.");
if (arg_type == 0 && arg_class != 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--class= may only be used in conjunction with --type=.");
if (arg_type != 0 && arg_class == 0)
arg_class = DNS_CLASS_IN;
if (arg_class != 0 && arg_type == 0)
arg_type = DNS_TYPE_A;
*remaining_args = option_parser_get_args(&opts);
return 1 /* work to do */;
}
static int translate(const char *verb, const char *single_arg, char **args) {
char **fake, **p;
size_t num;
assert(verb);
num = !!single_arg + strv_length(args) + 1;
p = fake = newa0(char *, num + 1);
*p++ = (char *) verb;
if (single_arg)
*p++ = (char *) single_arg;
STRV_FOREACH(a, args)
*p++ = *a;
return dispatch_verb(fake, /* userdata= */ NULL);
}
static int compat_main(char **args) {
int r = 0;
switch (arg_mode) {
case MODE_RESOLVE_HOST:
case MODE_RESOLVE_RECORD:
return translate("query", NULL, args);
case MODE_RESOLVE_SERVICE:
return translate("service", NULL, args);
case MODE_RESOLVE_OPENPGP:
return translate("openpgp", NULL, args);
case MODE_RESOLVE_TLSA:
return translate("tlsa", arg_service_family, args);
case MODE_STATISTICS:
return translate("statistics", NULL, NULL);
case MODE_RESET_STATISTICS:
return translate("reset-statistics", NULL, NULL);
case MODE_FLUSH_CACHES:
return translate("flush-caches", NULL, NULL);
case MODE_RESET_SERVER_FEATURES:
return translate("reset-server-features", NULL, NULL);
case MODE_STATUS:
return translate("status", NULL, args);
case MODE_SET_LINK:
assert(arg_ifname);
if (arg_disable_default_route) {
r = translate("default-route", arg_ifname, STRV_MAKE("no"));
if (r < 0)
return r;
}
if (arg_set_dns) {
r = translate("dns", arg_ifname, arg_set_dns);
if (r < 0)
return r;
}
if (arg_set_domain) {
r = translate("domain", arg_ifname, arg_set_domain);
if (r < 0)
return r;
}
if (arg_set_nta) {
r = translate("nta", arg_ifname, arg_set_nta);
if (r < 0)
return r;
}
if (arg_set_llmnr) {
r = translate("llmnr", arg_ifname, STRV_MAKE(arg_set_llmnr));
if (r < 0)
return r;
}
if (arg_set_mdns) {
r = translate("mdns", arg_ifname, STRV_MAKE(arg_set_mdns));
if (r < 0)
return r;
}
if (arg_set_dns_over_tls) {
r = translate("dnsovertls", arg_ifname, STRV_MAKE(arg_set_dns_over_tls));
if (r < 0)
return r;
}
if (arg_set_dnssec) {
r = translate("dnssec", arg_ifname, STRV_MAKE(arg_set_dnssec));
if (r < 0)
return r;
}
return r;
case MODE_REVERT_LINK:
assert(arg_ifname);
return translate("revert", arg_ifname, NULL);
case _MODE_INVALID:
assert_not_reached();
}
return 0;
}
static int run(int argc, char **argv) {
char **args = NULL;
bool compat = false;
int r;
LIBCRYPTO_NOTE(suggested);
LIBIDN2_NOTE(recommended);
setlocale(LC_ALL, "");
log_setup();
if (invoked_as(argv, "resolvconf")) {
compat = true;
r = resolvconf_parse_argv(argc, argv);
} else if (invoked_as(argv, "systemd-resolve")) {
compat = true;
r = compat_parse_argv(argc, argv, &args);
} else
r = native_parse_argv(argc, argv, &args);
if (r <= 0)
return r;
if (compat)
return compat_main(args);
return dispatch_verb(args, /* userdata= */ NULL);
}
DEFINE_MAIN_FUNCTION(run);
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