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author | Yu Watanabe <watanabe.yu+github@gmail.com> | 2019-05-27 08:52:27 +0900 |
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committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2019-07-17 06:59:12 +0900 |
commit | 15761549575027c1cf959a55e25f2c9bcacb79a8 (patch) | |
tree | 695fae4529f3f337f4f5ea5b8615569ee72e20a7 /src/network/networkd-link-bus.c | |
parent | 00d28db3222ba0fb04bc498fa6ecf9adf1f940e9 (diff) | |
download | systemd-15761549575027c1cf959a55e25f2c9bcacb79a8.tar.gz |
network: implement DBus methods to set DNS related properties
Diffstat (limited to 'src/network/networkd-link-bus.c')
-rw-r--r-- | src/network/networkd-link-bus.c | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/src/network/networkd-link-bus.c b/src/network/networkd-link-bus.c index eda0325c2b..03552725ed 100644 --- a/src/network/networkd-link-bus.c +++ b/src/network/networkd-link-bus.c @@ -1,13 +1,20 @@ /* SPDX-License-Identifier: LGPL-2.1+ */ +#include <net/if.h> +#include <netinet/in.h> +#include <sys/capability.h> + #include "alloc-util.h" #include "bus-common-errors.h" #include "bus-util.h" +#include "dns-domain.h" #include "networkd-link-bus.h" #include "networkd-link.h" #include "networkd-manager.h" #include "parse-util.h" +#include "resolve-util.h" #include "strv.h" +#include "user-util.h" BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState); BUS_DEFINE_PROPERTY_GET_ENUM(property_get_carrier_state, link_carrier_state, LinkCarrierState); @@ -59,6 +66,515 @@ static int property_get_bit_rates( return sd_bus_message_append(reply, "(tt)", tx, rx); } +static int verify_managed_link(Link *l, sd_bus_error *error) { + assert(l); + + if (l->flags & IFF_LOOPBACK) + return sd_bus_error_setf(error, BUS_ERROR_LINK_BUSY, "Link %s is loopback device.", l->ifname); + + return 0; +} + +int bus_link_method_set_ntp_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_strv_free_ char **ntp = NULL; + Link *l = userdata; + int r; + char **i; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read_strv(message, &ntp); + if (r < 0) + return r; + + STRV_FOREACH(i, ntp) { + r = dns_name_is_valid_or_address(*i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid NTP server: %s", *i); + } + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-ntp-servers", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + strv_free_and_replace(l->ntp, ntp); + + (void) link_dirty(l); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_free_ struct in_addr_data *dns = NULL; + size_t allocated = 0, n = 0; + Link *l = userdata; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_enter_container(message, 'a', "(iay)"); + if (r < 0) + return r; + + for (;;) { + int family; + size_t sz; + const void *d; + + assert_cc(sizeof(int) == sizeof(int32_t)); + + r = sd_bus_message_enter_container(message, 'r', "iay"); + if (r < 0) + return r; + if (r == 0) + break; + + r = sd_bus_message_read(message, "i", &family); + if (r < 0) + return r; + + if (!IN_SET(family, AF_INET, AF_INET6)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family); + + r = sd_bus_message_read_array(message, 'y', &d, &sz); + if (r < 0) + return r; + if (sz != FAMILY_ADDRESS_SIZE(family)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size"); + + if (!dns_server_address_valid(family, d)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNS server address"); + + r = sd_bus_message_exit_container(message); + if (r < 0) + return r; + + if (!GREEDY_REALLOC(dns, allocated, n+1)) + return -ENOMEM; + + dns[n].family = family; + memcpy(&dns[n].address, d, sz); + n++; + } + + r = sd_bus_message_exit_container(message); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-dns-servers", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + free_and_replace(l->dns, dns); + l->n_dns = n; + + (void) link_dirty(l); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(ordered_set_freep) OrderedSet *search_domains = NULL, *route_domains = NULL; + Link *l = userdata; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_enter_container(message, 'a', "(sb)"); + if (r < 0) + return r; + + for (;;) { + _cleanup_free_ char *str = NULL; + OrderedSet **domains; + const char *name; + int route_only; + + r = sd_bus_message_read(message, "(sb)", &name, &route_only); + if (r < 0) + return r; + if (r == 0) + break; + + r = dns_name_is_valid(name); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name); + if (!route_only && dns_name_is_root(name)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root domain is not suitable as search domain"); + + r = dns_name_normalize(name, 0, &str); + if (r < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", name); + + domains = route_only ? &route_domains : &search_domains; + r = ordered_set_ensure_allocated(domains, &string_hash_ops); + if (r < 0) + return r; + + r = ordered_set_put(*domains, str); + if (r < 0) + return r; + + TAKE_PTR(str); + } + + r = sd_bus_message_exit_container(message); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-domains", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + ordered_set_free_free(l->search_domains); + ordered_set_free_free(l->route_domains); + l->search_domains = TAKE_PTR(search_domains); + l->route_domains = TAKE_PTR(route_domains); + + (void) link_dirty(l); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + int r, b; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read(message, "b", &b); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-default-route", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + if (l->dns_default_route != b) { + l->dns_default_route = b; + (void) link_dirty(l); + } + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + ResolveSupport mode; + const char *llmnr; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read(message, "s", &llmnr); + if (r < 0) + return r; + + if (isempty(llmnr)) + mode = RESOLVE_SUPPORT_YES; + else { + mode = resolve_support_from_string(llmnr); + if (mode < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid LLMNR setting: %s", llmnr); + } + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-llmnr", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + if (l->llmnr != mode) { + l->llmnr = mode; + (void) link_dirty(l); + } + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + ResolveSupport mode; + const char *mdns; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read(message, "s", &mdns); + if (r < 0) + return r; + + if (isempty(mdns)) + mode = RESOLVE_SUPPORT_NO; + else { + mode = resolve_support_from_string(mdns); + if (mode < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid MulticastDNS setting: %s", mdns); + } + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-mdns", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + if (l->mdns != mode) { + l->mdns = mode; + (void) link_dirty(l); + } + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + const char *dns_over_tls; + DnsOverTlsMode mode; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read(message, "s", &dns_over_tls); + if (r < 0) + return r; + + if (isempty(dns_over_tls)) + mode = _DNS_OVER_TLS_MODE_INVALID; + else { + mode = dns_over_tls_mode_from_string(dns_over_tls); + if (mode < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSOverTLS setting: %s", dns_over_tls); + } + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-dns-over-tls", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + if (l->dns_over_tls_mode != mode) { + l->dns_over_tls_mode = mode; + (void) link_dirty(l); + } + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + const char *dnssec; + DnssecMode mode; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read(message, "s", &dnssec); + if (r < 0) + return r; + + if (isempty(dnssec)) + mode = _DNSSEC_MODE_INVALID; + else { + mode = dnssec_mode_from_string(dnssec); + if (mode < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSSEC setting: %s", dnssec); + } + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-dnssec", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + if (l->dnssec_mode != mode) { + l->dnssec_mode = mode; + (void) link_dirty(l); + } + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_set_free_free_ Set *ns = NULL; + _cleanup_strv_free_ char **ntas = NULL; + Link *l = userdata; + int r; + char **i; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = sd_bus_message_read_strv(message, &ntas); + if (r < 0) + return r; + + STRV_FOREACH(i, ntas) { + r = dns_name_is_valid(*i); + if (r < 0) + return r; + if (r == 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid negative trust anchor domain: %s", *i); + } + + ns = set_new(&dns_name_hash_ops); + if (!ns) + return -ENOMEM; + + STRV_FOREACH(i, ntas) { + r = set_put_strdup(ns, *i); + if (r < 0) + return r; + } + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.set-dnssec-negative-trust-anchors", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + set_free_free(l->dnssec_negative_trust_anchors); + l->dnssec_negative_trust_anchors = TAKE_PTR(ns); + + (void) link_dirty(l); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_revert_ntp(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.revert-ntp", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + link_ntp_settings_clear(l); + (void) link_dirty(l); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_link_method_revert_dns(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Link *l = userdata; + int r; + + assert(message); + assert(l); + + r = verify_managed_link(l, error); + if (r < 0) + return r; + + r = bus_verify_polkit_async(message, CAP_NET_ADMIN, + "org.freedesktop.network1.revert-dns", + NULL, true, UID_INVALID, + &l->manager->polkit_registry, error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Polkit will call us back */ + + link_dns_settings_clear(l); + (void) link_dirty(l); + + return sd_bus_reply_method_return(message, NULL); +} + const sd_bus_vtable link_vtable[] = { SD_BUS_VTABLE_START(0), @@ -68,6 +584,18 @@ const sd_bus_vtable link_vtable[] = { SD_BUS_PROPERTY("AdministrativeState", "s", property_get_administrative_state, offsetof(Link, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("BitRates", "(tt)", property_get_bit_rates, 0, 0), + SD_BUS_METHOD("SetNTP", "as", NULL, bus_link_method_set_ntp_servers, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDNS", "a(iay)", NULL, bus_link_method_set_dns_servers, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDomains", "a(sb)", NULL, bus_link_method_set_domains, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDefaultRoute", "b", NULL, bus_link_method_set_default_route, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetLLMNR", "s", NULL, bus_link_method_set_llmnr, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetMulticastDNS", "s", NULL, bus_link_method_set_mdns, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDNSOverTLS", "s", NULL, bus_link_method_set_dns_over_tls, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDNSSEC", "s", NULL, bus_link_method_set_dnssec, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("SetDNSSECNegativeTrustAnchors", "as", NULL, bus_link_method_set_dnssec_negative_trust_anchors, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("RevertNTP", NULL, NULL, bus_link_method_revert_ntp, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("RevertDNS", NULL, NULL, bus_link_method_revert_dns, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_VTABLE_END }; 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