src/network/networkd-manager-bus.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <net/if.h>
   4 #include <netinet/in.h>
   5 #include <sys/capability.h>
   6
   7 #include "alloc-util.h"
   8 #include "bus-common-errors.h"
   9 #include "bus-message-util.h"
  10 #include "bus-polkit.h"
  11 #include "networkd-json.h"
  12 #include "networkd-link-bus.h"
  13 #include "networkd-link.h"
  14 #include "networkd-manager-bus.h"
  15 #include "networkd-manager.h"
  16 #include "path-util.h"
  17 #include "socket-netlink.h"
  18 #include "strv.h"
  19 #include "user-util.h"
  20
  21 static int method_list_links(sd_bus_message *message, void *userdata, sd_bus_error *error) {
  22         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
  23         Manager *manager = userdata;
  24         Link *link;
  25         int r;
  26
  27         r = sd_bus_message_new_method_return(message, &reply);
  28         if (r < 0)
  29                 return r;
  30
  31         r = sd_bus_message_open_container(reply, 'a', "(iso)");
  32         if (r < 0)
  33                 return r;
  34
  35         HASHMAP_FOREACH(link, manager->links) {
  36                 _cleanup_free_ char *path = NULL;
  37
  38                 path = link_bus_path(link);
  39                 if (!path)
  40                         return -ENOMEM;
  41
  42                 r = sd_bus_message_append(
  43                         reply, "(iso)",
  44                         link->ifindex,
  45                         link->ifname,
  46                         empty_to_root(path));
  47                 if (r < 0)
  48                         return r;
  49         }
  50
  51         r = sd_bus_message_close_container(reply);
  52         if (r < 0)
  53                 return r;
  54
  55         return sd_bus_send(NULL, reply, NULL);
  56 }
  57
  58 static int method_get_link_by_name(sd_bus_message *message, void *userdata, sd_bus_error *error) {
  59         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
  60         _cleanup_free_ char *path = NULL;
  61         Manager *manager = userdata;
  62         const char *name;
  63         int index, r;
  64         Link *link;
  65
  66         r = sd_bus_message_read(message, "s", &name);
  67         if (r < 0)
  68                 return r;
  69
  70         index = resolve_ifname(&manager->rtnl, name);
  71         if (index < 0)
  72                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %s cannot be resolved", name);
  73
  74         link = hashmap_get(manager->links, INT_TO_PTR(index));
  75         if (!link)
  76                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %s not known", name);
  77
  78         r = sd_bus_message_new_method_return(message, &reply);
  79         if (r < 0)
  80                 return r;
  81
  82         path = link_bus_path(link);
  83         if (!path)
  84                 return -ENOMEM;
  85
  86         r = sd_bus_message_append(reply, "io", link->ifindex, empty_to_root(path));
  87         if (r < 0)
  88                 return r;
  89
  90         return sd_bus_send(NULL, reply, NULL);
  91 }
  92
  93 static int method_get_link_by_index(sd_bus_message *message, void *userdata, sd_bus_error *error) {
  94         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
  95         _cleanup_free_ char *path = NULL;
  96         Manager *manager = userdata;
  97         int ifindex, r;
  98         Link *link;
  99
 100         r = bus_message_read_ifindex(message, error, &ifindex);
 101         if (r < 0)
 102                 return r;
 103
 104         link = hashmap_get(manager->links, INT_TO_PTR(ifindex));
 105         if (!link)
 106                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %i not known", ifindex);
 107
 108         r = sd_bus_message_new_method_return(message, &reply);
 109         if (r < 0)
 110                 return r;
 111
 112         path = link_bus_path(link);
 113         if (!path)
 114                 return -ENOMEM;
 115
 116         r = sd_bus_message_append(reply, "so", link->ifname, empty_to_root(path));
 117         if (r < 0)
 118                 return r;
 119
 120         return sd_bus_send(NULL, reply, NULL);
 121 }
 122
 123 static int call_link_method(Manager *m, sd_bus_message *message, sd_bus_message_handler_t handler, sd_bus_error *error) {
 124         int ifindex, r;
 125         Link *l;
 126
 127         assert(m);
 128         assert(message);
 129         assert(handler);
 130
 131         r = bus_message_read_ifindex(message, error, &ifindex);
 132         if (r < 0)
 133                 return r;
 134
 135         l = hashmap_get(m->links, INT_TO_PTR(ifindex));
 136         if (!l)
 137                 return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_LINK, "Link %i not known", ifindex);
 138
 139         return handler(message, l, error);
 140 }
 141
 142 static int bus_method_set_link_ntp_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 143         return call_link_method(userdata, message, bus_link_method_set_ntp_servers, error);
 144 }
 145
 146 static int bus_method_set_link_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 147         return call_link_method(userdata, message, bus_link_method_set_dns_servers, error);
 148 }
 149
 150 static int bus_method_set_link_dns_servers_ex(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 151         return call_link_method(userdata, message, bus_link_method_set_dns_servers_ex, error);
 152 }
 153
 154 static int bus_method_set_link_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 155         return call_link_method(userdata, message, bus_link_method_set_domains, error);
 156 }
 157
 158 static int bus_method_set_link_default_route(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 159         return call_link_method(userdata, message, bus_link_method_set_default_route, error);
 160 }
 161
 162 static int bus_method_set_link_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 163         return call_link_method(userdata, message, bus_link_method_set_llmnr, error);
 164 }
 165
 166 static int bus_method_set_link_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 167         return call_link_method(userdata, message, bus_link_method_set_mdns, error);
 168 }
 169
 170 static int bus_method_set_link_dns_over_tls(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 171         return call_link_method(userdata, message, bus_link_method_set_dns_over_tls, error);
 172 }
 173
 174 static int bus_method_set_link_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 175         return call_link_method(userdata, message, bus_link_method_set_dnssec, error);
 176 }
 177
 178 static int bus_method_set_link_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 179         return call_link_method(userdata, message, bus_link_method_set_dnssec_negative_trust_anchors, error);
 180 }
 181
 182 static int bus_method_revert_link_ntp(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 183         return call_link_method(userdata, message, bus_link_method_revert_ntp, error);
 184 }
 185
 186 static int bus_method_revert_link_dns(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 187         return call_link_method(userdata, message, bus_link_method_revert_dns, error);
 188 }
 189
 190 static int bus_method_renew_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 191         return call_link_method(userdata, message, bus_link_method_renew, error);
 192 }
 193
 194 static int bus_method_force_renew_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 195         return call_link_method(userdata, message, bus_link_method_force_renew, error);
 196 }
 197
 198 static int bus_method_reconfigure_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 199         return call_link_method(userdata, message, bus_link_method_reconfigure, error);
 200 }
 201
 202 static int bus_method_reload(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 203         Manager *manager = userdata;
 204         Link *link;
 205         int r;
 206
 207         r = bus_verify_polkit_async(message, CAP_NET_ADMIN,
 208                                     "org.freedesktop.network1.reload",
 209                                     NULL, true, UID_INVALID,
 210                                     &manager->polkit_registry, error);
 211         if (r < 0)
 212                 return r;
 213         if (r == 0)
 214                 return 1; /* Polkit will call us back */
 215
 216         r = netdev_load(manager, true);
 217         if (r < 0)
 218                 return r;
 219
 220         r = network_reload(manager);
 221         if (r < 0)
 222                 return r;
 223
 224         HASHMAP_FOREACH(link, manager->links) {
 225                 r = link_reconfigure(link, false);
 226                 if (r < 0)
 227                         return r;
 228         }
 229
 230         return sd_bus_reply_method_return(message, NULL);
 231 }
 232
 233 static int bus_method_describe_link(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 234         return call_link_method(userdata, message, bus_link_method_describe, error);
 235 }
 236
 237 static int bus_method_describe(sd_bus_message *message, void *userdata, sd_bus_error *error) {
 238         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
 239         _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
 240         _cleanup_free_ char *text = NULL;
 241         Manager *manager = userdata;
 242         int r;
 243
 244         assert(message);
 245         assert(manager);
 246
 247         r = manager_build_json(manager, &v);
 248         if (r < 0)
 249                 return log_error_errno(r, "Failed to build JSON data: %m");
 250
 251         r = json_variant_format(v, 0, &text);
 252         if (r < 0)
 253                 return log_error_errno(r, "Failed to format JSON data: %m");
 254
 255         r = sd_bus_message_new_method_return(message, &reply);
 256         if (r < 0)
 257                 return r;
 258
 259         r = sd_bus_message_append(reply, "s", text);
 260         if (r < 0)
 261                 return r;
 262
 263         return sd_bus_send(NULL, reply, NULL);
 264 }
 265
 266 const sd_bus_vtable manager_vtable[] = {
 267         SD_BUS_VTABLE_START(0),
 268
 269         SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Manager, operational_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 270         SD_BUS_PROPERTY("CarrierState", "s", property_get_carrier_state, offsetof(Manager, carrier_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 271         SD_BUS_PROPERTY("AddressState", "s", property_get_address_state, offsetof(Manager, address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 272         SD_BUS_PROPERTY("IPv4AddressState", "s", property_get_address_state, offsetof(Manager, ipv4_address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 273         SD_BUS_PROPERTY("IPv6AddressState", "s", property_get_address_state, offsetof(Manager, ipv6_address_state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
 274
 275         SD_BUS_METHOD_WITH_ARGS("ListLinks",
 276                                 SD_BUS_NO_ARGS,
 277                                 SD_BUS_RESULT("a(iso)", links),
 278                                 method_list_links,
 279                                 SD_BUS_VTABLE_UNPRIVILEGED),
 280         SD_BUS_METHOD_WITH_ARGS("GetLinkByName",
 281                                 SD_BUS_ARGS("s", name),
 282                                 SD_BUS_RESULT("i", ifindex, "o", path),
 283                                 method_get_link_by_name,
 284                                 SD_BUS_VTABLE_UNPRIVILEGED),
 285         SD_BUS_METHOD_WITH_ARGS("GetLinkByIndex",
 286                                 SD_BUS_ARGS("i", ifindex),
 287                                 SD_BUS_RESULT("s", name, "o", path),
 288                                 method_get_link_by_index,
 289                                 SD_BUS_VTABLE_UNPRIVILEGED),
 290         SD_BUS_METHOD_WITH_ARGS("SetLinkNTP",
 291                                 SD_BUS_ARGS("i", ifindex, "as", servers),
 292                                 SD_BUS_NO_RESULT,
 293                                 bus_method_set_link_ntp_servers,
 294                                 SD_BUS_VTABLE_UNPRIVILEGED),
 295         SD_BUS_METHOD_WITH_ARGS("SetLinkDNS",
 296                                 SD_BUS_ARGS("i", ifindex, "a(iay)", addresses),
 297                                 SD_BUS_NO_RESULT,
 298                                 bus_method_set_link_dns_servers,
 299                                 SD_BUS_VTABLE_UNPRIVILEGED),
 300         SD_BUS_METHOD_WITH_ARGS("SetLinkDNSEx",
 301                                 SD_BUS_ARGS("i", ifindex, "a(iayqs)", addresses),
 302                                 SD_BUS_NO_RESULT,
 303                                 bus_method_set_link_dns_servers_ex,
 304                                 SD_BUS_VTABLE_UNPRIVILEGED),
 305         SD_BUS_METHOD_WITH_ARGS("SetLinkDomains",
 306                                 SD_BUS_ARGS("i", ifindex, "a(sb)", domains),
 307                                 SD_BUS_NO_RESULT,
 308                                 bus_method_set_link_domains,
 309                                 SD_BUS_VTABLE_UNPRIVILEGED),
 310         SD_BUS_METHOD_WITH_ARGS("SetLinkDefaultRoute",
 311                                 SD_BUS_ARGS("i", ifindex, "b", enable),
 312                                 SD_BUS_NO_RESULT,
 313                                 bus_method_set_link_default_route,
 314                                 SD_BUS_VTABLE_UNPRIVILEGED),
 315         SD_BUS_METHOD_WITH_ARGS("SetLinkLLMNR",
 316                                 SD_BUS_ARGS("i", ifindex, "s", mode),
 317                                 SD_BUS_NO_RESULT,
 318                                 bus_method_set_link_llmnr,
 319                                 SD_BUS_VTABLE_UNPRIVILEGED),
 320         SD_BUS_METHOD_WITH_ARGS("SetLinkMulticastDNS",
 321                                 SD_BUS_ARGS("i", ifindex, "s", mode),
 322                                 SD_BUS_NO_RESULT,
 323                                 bus_method_set_link_mdns,
 324                                 SD_BUS_VTABLE_UNPRIVILEGED),
 325         SD_BUS_METHOD_WITH_ARGS("SetLinkDNSOverTLS",
 326                                 SD_BUS_ARGS("i", ifindex, "s", mode),
 327                                 SD_BUS_NO_RESULT,
 328                                 bus_method_set_link_dns_over_tls,
 329                                 SD_BUS_VTABLE_UNPRIVILEGED),
 330         SD_BUS_METHOD_WITH_ARGS("SetLinkDNSSEC",
 331                                 SD_BUS_ARGS("i", ifindex, "s", mode),
 332                                 SD_BUS_NO_RESULT,
 333                                 bus_method_set_link_dnssec,
 334                                 SD_BUS_VTABLE_UNPRIVILEGED),
 335         SD_BUS_METHOD_WITH_ARGS("SetLinkDNSSECNegativeTrustAnchors",
 336                                 SD_BUS_ARGS("i", ifindex, "as", names),
 337                                 SD_BUS_NO_RESULT,
 338                                 bus_method_set_link_dnssec_negative_trust_anchors,
 339                                 SD_BUS_VTABLE_UNPRIVILEGED),
 340         SD_BUS_METHOD_WITH_ARGS("RevertLinkNTP",
 341                                 SD_BUS_ARGS("i", ifindex),
 342                                 SD_BUS_NO_RESULT,
 343                                 bus_method_revert_link_ntp,
 344                                 SD_BUS_VTABLE_UNPRIVILEGED),
 345         SD_BUS_METHOD_WITH_ARGS("RevertLinkDNS",
 346                                 SD_BUS_ARGS("i", ifindex),
 347                                 SD_BUS_NO_RESULT,
 348                                 bus_method_revert_link_dns,
 349                                 SD_BUS_VTABLE_UNPRIVILEGED),
 350         SD_BUS_METHOD_WITH_ARGS("RenewLink",
 351                                 SD_BUS_ARGS("i", ifindex),
 352                                 SD_BUS_NO_RESULT,
 353                                 bus_method_renew_link,
 354                                 SD_BUS_VTABLE_UNPRIVILEGED),
 355         SD_BUS_METHOD_WITH_ARGS("ForceRenewLink",
 356                                 SD_BUS_ARGS("i", ifindex),
 357                                 SD_BUS_NO_RESULT,
 358                                 bus_method_force_renew_link,
 359                                 SD_BUS_VTABLE_UNPRIVILEGED),
 360         SD_BUS_METHOD_WITH_ARGS("ReconfigureLink",
 361                                 SD_BUS_ARGS("i", ifindex),
 362                                 SD_BUS_NO_RESULT,
 363                                 bus_method_reconfigure_link,
 364                                 SD_BUS_VTABLE_UNPRIVILEGED),
 365         SD_BUS_METHOD_WITH_ARGS("Reload",
 366                                 SD_BUS_NO_ARGS,
 367                                 SD_BUS_NO_RESULT,
 368                                 bus_method_reload,
 369                                 SD_BUS_VTABLE_UNPRIVILEGED),
 370         SD_BUS_METHOD_WITH_ARGS("DescribeLink",
 371                                 SD_BUS_ARGS("i", ifindex),
 372                                 SD_BUS_RESULT("s", json),
 373                                 bus_method_describe_link,
 374                                 SD_BUS_VTABLE_UNPRIVILEGED),
 375         SD_BUS_METHOD_WITH_ARGS("Describe",
 376                                 SD_BUS_NO_ARGS,
 377                                 SD_BUS_RESULT("s", json),
 378                                 bus_method_describe,
 379                                 SD_BUS_VTABLE_UNPRIVILEGED),
 380
 381         SD_BUS_VTABLE_END
 382 };
 383
 384 int manager_send_changed_strv(Manager *manager, char **properties) {
 385         assert(manager);
 386         assert(properties);
 387
 388         if (sd_bus_is_ready(manager->bus) <= 0)
 389                 return 0;
 390
 391         return sd_bus_emit_properties_changed_strv(
 392                         manager->bus,
 393                         "/org/freedesktop/network1",
 394                         "org.freedesktop.network1.Manager",
 395                         properties);
 396 }