src/config.c

   1 #include <resolv.h>
   2 #include <signal.h>
   3 #include <arpa/inet.h>
   4
   5 #include <uci.h>
   6 #include <uci_blob.h>
   7
   8 #include "odhcpd.h"
   9
  10 static struct blob_buf b;
  11 struct list_head leases = LIST_HEAD_INIT(leases);
  12 struct list_head interfaces = LIST_HEAD_INIT(interfaces);
  13 struct config config = {false, NULL, NULL};
  14
  15 enum {
  16         IFACE_ATTR_INTERFACE,
  17         IFACE_ATTR_IFNAME,
  18         IFACE_ATTR_DYNAMICDHCP,
  19         IFACE_ATTR_IGNORE,
  20         IFACE_ATTR_LEASETIME,
  21         IFACE_ATTR_LIMIT,
  22         IFACE_ATTR_START,
  23         IFACE_ATTR_MASTER,
  24         IFACE_ATTR_UPSTREAM,
  25         IFACE_ATTR_RA,
  26         IFACE_ATTR_DHCPV4,
  27         IFACE_ATTR_DHCPV6,
  28         IFACE_ATTR_NDPROXY,
  29         IFACE_ATTR_DNS,
  30         IFACE_ATTR_DOMAIN,
  31         IFACE_ATTR_ULA_COMPAT,
  32         IFACE_ATTR_RA_DEFAULT,
  33         IFACE_ATTR_RA_MANAGEMENT,
  34         IFACE_ATTR_RA_OFFLINK,
  35         IFACE_ATTR_RA_PREFERENCE,
  36         IFACE_ATTR_NDPROXY_ROUTING,
  37         IFACE_ATTR_NDPROXY_SLAVE,
  38         IFACE_ATTR_NDPROXY_STATIC,
  39         IFACE_ATTR_MAX
  40 };
  41
  42 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  43         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  44         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  45         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
  46         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
  47         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
  48         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
  49         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
  50         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
  51         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
  52         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
  53         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
  54         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
  55         [IFACE_ATTR_NDPROXY] = { .name = "ndproxy", .type = BLOBMSG_TYPE_BOOL },
  56         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  57         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
  58         [IFACE_ATTR_ULA_COMPAT] = { .name = "ula_compat", .type = BLOBMSG_TYPE_BOOL },
  59         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
  60         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
  61         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
  62         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
  63         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
  64         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
  65         [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
  66 };
  67
  68 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
  69         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
  70         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
  71         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
  72         [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
  73 };
  74
  75 const struct uci_blob_param_list interface_attr_list = {
  76         .n_params = IFACE_ATTR_MAX,
  77         .params = iface_attrs,
  78         .info = iface_attr_info,
  79 };
  80
  81
  82 enum {
  83         LEASE_ATTR_IP,
  84         LEASE_ATTR_MAC,
  85         LEASE_ATTR_DUID,
  86         LEASE_ATTR_HOSTID,
  87         LEASE_ATTR_HOSTNAME,
  88         LEASE_ATTR_MAX
  89 };
  90
  91
  92 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
  93         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
  94         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
  95         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
  96         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
  97         [LEASE_ATTR_HOSTNAME] = { .name = "hostname", .type = BLOBMSG_TYPE_STRING },
  98 };
  99
 100
 101 const struct uci_blob_param_list lease_attr_list = {
 102         .n_params = LEASE_ATTR_MAX,
 103         .params = lease_attrs,
 104 };
 105
 106
 107 enum {
 108         ODHCPD_ATTR_LEGACY,
 109         ODHCPD_ATTR_LEASEFILE,
 110         ODHCPD_ATTR_LEASETRIGGER,
 111         ODHCPD_ATTR_MAX
 112 };
 113
 114
 115 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
 116         [ODHCPD_ATTR_LEGACY] = { .name = "legacy", .type = BLOBMSG_TYPE_BOOL },
 117         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
 118         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
 119 };
 120
 121
 122 const struct uci_blob_param_list odhcpd_attr_list = {
 123         .n_params = ODHCPD_ATTR_MAX,
 124         .params = odhcpd_attrs,
 125 };
 126
 127
 128 static struct interface* get_interface(const char *name)
 129 {
 130         struct interface *c;
 131         list_for_each_entry(c, &interfaces, head)
 132                 if (!strcmp(c->name, name))
 133                         return c;
 134         return NULL;
 135 }
 136
 137
 138 static void clean_interface(struct interface *iface)
 139 {
 140         free(iface->dns);
 141         free(iface->search);
 142         free(iface->upstream);
 143         free(iface->static_ndp);
 144         free(iface->dhcpv4_dns);
 145         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
 146 }
 147
 148
 149 static void close_interface(struct interface *iface)
 150 {
 151         if (iface->head.next)
 152                 list_del(&iface->head);
 153
 154         setup_router_interface(iface, false);
 155         setup_dhcpv6_interface(iface, false);
 156         setup_ndp_interface(iface, false);
 157         setup_dhcpv4_interface(iface, false);
 158
 159         clean_interface(iface);
 160         free(iface);
 161 }
 162
 163
 164 static int parse_mode(const char *mode)
 165 {
 166         if (!strcmp(mode, "disabled")) {
 167                 return RELAYD_DISABLED;
 168         } else if (!strcmp(mode, "server")) {
 169                 return RELAYD_SERVER;
 170         } else if (!strcmp(mode, "relay")) {
 171                 return RELAYD_RELAY;
 172         } else if (!strcmp(mode, "hybrid")) {
 173                 return RELAYD_HYBRID;
 174         } else {
 175                 return -1;
 176         }
 177 }
 178
 179
 180 static void set_config(struct uci_section *s)
 181 {
 182         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
 183
 184         blob_buf_init(&b, 0);
 185         uci_to_blob(&b, s, &lease_attr_list);
 186         blobmsg_parse(lease_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 187
 188         if ((c = tb[ODHCPD_ATTR_LEGACY]))
 189                 config.legacy = blobmsg_get_bool(c);
 190
 191         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
 192                 free(config.dhcp_statefile);
 193                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
 194         }
 195
 196         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
 197                 free(config.dhcp_cb);
 198                 config.dhcp_cb = strdup(blobmsg_get_string(c));
 199         }
 200 }
 201
 202
 203 static int set_lease(struct uci_section *s)
 204 {
 205         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
 206
 207         blob_buf_init(&b, 0);
 208         uci_to_blob(&b, s, &lease_attr_list);
 209         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 210
 211         size_t hostlen = 1;
 212         if ((c = tb[LEASE_ATTR_HOSTNAME]))
 213                 hostlen = blobmsg_data_len(c);
 214
 215         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
 216
 217         if (hostlen > 1)
 218                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
 219
 220         if ((c = tb[LEASE_ATTR_IP]))
 221                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
 222                         goto err;
 223
 224         if ((c = tb[LEASE_ATTR_MAC]))
 225                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
 226                         goto err;
 227
 228         if ((c = tb[LEASE_ATTR_DUID])) {
 229                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
 230                 lease->duid = malloc(duidlen);
 231                 ssize_t len = odhcpd_unhexlify(lease->duid,
 232                                 duidlen, blobmsg_get_string(c));
 233
 234                 if (len < 0)
 235                         goto err;
 236
 237                 lease->duid_len = len;
 238         }
 239
 240         if ((c = tb[LEASE_ATTR_HOSTID]))
 241                 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
 242                                 blobmsg_get_string(c)) < 0)
 243                         goto err;
 244
 245         list_add(&lease->head, &leases);
 246         return 0;
 247
 248 err:
 249         free(lease->duid);
 250         free(lease);
 251         return -1;
 252 }
 253
 254
 255 int config_parse_interface(struct blob_attr *b, const char *name, bool overwrite)
 256 {
 257         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
 258         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(b), blob_len(b));
 259
 260         if (tb[IFACE_ATTR_INTERFACE])
 261                 name = blobmsg_data(tb[IFACE_ATTR_INTERFACE]);
 262
 263         struct interface *iface = get_interface(name);
 264         if (!iface) {
 265                 iface = calloc(1, sizeof(*iface));
 266                 strncpy(iface->name, name, sizeof(iface->name) - 1);
 267                 list_add(&iface->head, &interfaces);
 268         } else {
 269                 clean_interface(iface);
 270         }
 271
 272         const char *ifname = NULL;
 273 #ifdef WITH_UBUS
 274         if (overwrite)
 275                 ifname = ubus_get_ifname(name);
 276 #endif
 277         if ((c = tb[IFACE_ATTR_IFNAME]))
 278                 ifname = blobmsg_get_string(c);
 279
 280         strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
 281         iface->inuse = true;
 282
 283         if (overwrite)
 284                 clean_interface(iface);
 285
 286         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
 287                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
 288
 289         if ((c = tb[IFACE_ATTR_IGNORE]))
 290                 iface->ignore = blobmsg_get_bool(c);
 291
 292         if ((c = tb[IFACE_ATTR_LEASETIME])) {
 293                 char *val = blobmsg_get_string(c), *endptr;
 294                 double time = strtod(val, &endptr);
 295                 if (time && endptr[0]) {
 296                         if (endptr[0] == 's')
 297                                 time *= 1;
 298                         else if (endptr[0] == 'm')
 299                                 time *= 60;
 300                         else if (endptr[0] == 'h')
 301                                 time *= 3600;
 302                         else if (endptr[0] == 'd')
 303                                 time *= 24 * 3600;
 304                         else if (endptr[0] == 'w')
 305                                 time *= 7 * 24 * 3600;
 306                         else
 307                                 goto err;
 308                 }
 309
 310                 if (time >= 60)
 311                         iface->dhcpv4_leasetime = time;
 312         }
 313
 314         if ((c = tb[IFACE_ATTR_START])) {
 315                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
 316
 317                 if (config.legacy)
 318                         iface->dhcpv4 = RELAYD_SERVER;
 319         }
 320
 321         if ((c = tb[IFACE_ATTR_LIMIT]))
 322                 iface->dhcpv4_end.s_addr = htonl(
 323                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
 324
 325         if ((c = tb[IFACE_ATTR_MASTER]))
 326                 iface->master = blobmsg_get_bool(c);
 327
 328         if ((c = tb[IFACE_ATTR_UPSTREAM])) {
 329                 struct blob_attr *cur;
 330                 int rem;
 331
 332                 blobmsg_for_each_attr(cur, c, rem) {
 333                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 334                                 continue;
 335
 336                         iface->upstream = realloc(iface->upstream,
 337                                         iface->upstream_len + blobmsg_data_len(cur));
 338                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
 339                         iface->upstream_len += blobmsg_data_len(cur);
 340                 }
 341         }
 342
 343         if ((c = tb[IFACE_ATTR_RA]))
 344                 if ((iface->ra = parse_mode(blobmsg_get_string(c))) < 0)
 345                         goto err;
 346
 347         if ((c = tb[IFACE_ATTR_DHCPV4]))
 348                 if ((iface->dhcpv4 = parse_mode(blobmsg_get_string(c))) < 0)
 349                         goto err;
 350
 351         if ((c = tb[IFACE_ATTR_DHCPV6]))
 352                 if ((iface->dhcpv6 = parse_mode(blobmsg_get_string(c))) < 0)
 353                         goto err;
 354
 355         if ((c = tb[IFACE_ATTR_NDPROXY]))
 356                 iface->ndp = blobmsg_get_bool(c) ? RELAYD_RELAY : RELAYD_DISABLED;
 357
 358         if ((c = tb[IFACE_ATTR_DNS])) {
 359                 struct blob_attr *cur;
 360                 int rem;
 361
 362                 blobmsg_for_each_attr(cur, c, rem) {
 363                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 364                                 continue;
 365
 366                         struct in_addr addr4;
 367                         struct in6_addr addr6;
 368                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 369                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
 370                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
 371                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
 372                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
 373                                 iface->dns = realloc(iface->dns,
 374                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
 375                                 iface->dns[iface->dns_cnt - 1] = addr6;
 376                         } else {
 377                                 goto err;
 378                         }
 379                 }
 380         }
 381
 382         if ((c = tb[IFACE_ATTR_DOMAIN])) {
 383                 struct blob_attr *cur;
 384                 int rem;
 385
 386                 blobmsg_for_each_attr(cur, c, rem) {
 387                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 388                                 continue;
 389
 390                         uint8_t buf[256];
 391                         int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
 392                         if (len <= 0)
 393                                 goto err;
 394
 395                         iface->search = realloc(iface->search, iface->search_len + len);
 396                         memcpy(&iface->search[iface->search_len], buf, len);
 397                         iface->search_len += len;
 398                 }
 399         }
 400
 401         if ((c = tb[IFACE_ATTR_ULA_COMPAT]))
 402                 iface->deprecate_ula_if_public_avail = blobmsg_get_bool(c);
 403
 404         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
 405                 iface->default_router = blobmsg_get_u32(c);
 406
 407         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
 408                 iface->managed = blobmsg_get_u32(c);
 409
 410         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
 411                 iface->ra_not_onlink = blobmsg_get_bool(c);
 412
 413         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
 414                 const char *prio = blobmsg_get_string(c);
 415
 416                 if (!strcmp(prio, "high"))
 417                         iface->route_preference = 1;
 418                 else if (!strcmp(prio, "low"))
 419                         iface->route_preference = -1;
 420                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
 421                         iface->route_preference = 0;
 422                 else
 423                         goto err;
 424         }
 425
 426         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
 427                 iface->learn_routes = blobmsg_get_bool(c);
 428
 429         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
 430                 iface->external = blobmsg_get_bool(c);
 431
 432         if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
 433                 struct blob_attr *cur;
 434                 int rem;
 435
 436                 blobmsg_for_each_attr(cur, c, rem) {
 437                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 438                                 continue;
 439
 440                         int len = blobmsg_data_len(cur);
 441                         iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
 442                         memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
 443                         iface->static_ndp_len += len;
 444                 }
 445         }
 446
 447         iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) < 0;
 448         return 0;
 449
 450 err:
 451         close_interface(iface);
 452         return -1;
 453 }
 454
 455 static int set_interface(struct uci_section *s)
 456 {
 457         blob_buf_init(&b, 0);
 458         uci_to_blob(&b, s, &interface_attr_list);
 459         return config_parse_interface(b.head, s->e.name, true);
 460 }
 461
 462
 463 static volatile bool do_reload = false;
 464 static void set_stop(int signal)
 465 {
 466         uloop_end();
 467         do_reload = (signal == SIGHUP);
 468 }
 469
 470 void odhcpd_run(void)
 471 {
 472         struct uci_context *uci = uci_alloc_context();
 473         signal(SIGTERM, set_stop);
 474         signal(SIGHUP, set_stop);
 475         signal(SIGINT, set_stop);
 476
 477         do {
 478                 do_reload = false;
 479
 480                 struct lease *l;
 481                 list_for_each_entry(l, &leases, head) {
 482                         list_del(&l->head);
 483                         free(l->duid);
 484                         free(l);
 485                 }
 486
 487                 struct uci_package *dhcp = NULL;
 488                 if (!uci_load(uci, "dhcp", &dhcp)) {
 489                         struct uci_element *e;
 490                         uci_foreach_element(&dhcp->sections, e) {
 491                                 struct uci_section *s = uci_to_section(e);
 492                                 if (!strcmp(s->type, "lease"))
 493                                         set_lease(s);
 494                                 else if (!strcmp(s->type, "odhcpd"))
 495                                         set_config(s);
 496                         }
 497
 498                         uci_foreach_element(&dhcp->sections, e) {
 499                                 struct uci_section *s = uci_to_section(e);
 500                                 if (!strcmp(s->type, "dhcp"))
 501                                         set_interface(s);
 502                         }
 503                 }
 504
 505 #ifdef WITH_UBUS
 506                 ubus_apply_network();
 507 #endif
 508
 509                 // Evaluate hybrid mode for master
 510                 struct interface *master = NULL, *i;
 511                 list_for_each_entry(i, &interfaces, head) {
 512                         if (!i->master)
 513                                 continue;
 514
 515                         enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
 516                         if (i->dhcpv6 == RELAYD_HYBRID)
 517                                 i->dhcpv6 = hybrid_mode;
 518
 519                         if (i->ra == RELAYD_HYBRID)
 520                                 i->ra = hybrid_mode;
 521
 522                         if (i->ndp == RELAYD_HYBRID)
 523                                 i->ndp = hybrid_mode;
 524
 525                         if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
 526                                 master = i;
 527                 }
 528
 529
 530                 list_for_each_entry(i, &interfaces, head) {
 531                         if (i->inuse && !i->ignore) {
 532                                 // Resolve hybrid mode
 533                                 if (i->dhcpv6 == RELAYD_HYBRID)
 534                                         i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
 535                                                         RELAYD_RELAY : RELAYD_SERVER;
 536
 537                                 if (i->ra == RELAYD_HYBRID)
 538                                         i->ra = (master && master->ra == RELAYD_RELAY) ?
 539                                                         RELAYD_RELAY : RELAYD_SERVER;
 540
 541                                 if (i->ndp == RELAYD_HYBRID)
 542                                         i->ndp = (master && master->ndp == RELAYD_RELAY) ?
 543                                                         RELAYD_RELAY : RELAYD_SERVER;
 544
 545                                 setup_router_interface(i, true);
 546                                 setup_dhcpv6_interface(i, true);
 547                                 setup_ndp_interface(i, true);
 548                                 setup_dhcpv4_interface(i, true);
 549                         } else {
 550                                 close_interface(i);
 551                         }
 552                 }
 553
 554                 uloop_run();
 555
 556                 if (dhcp)
 557                         uci_unload(uci, dhcp);
 558         } while (do_reload);
 559 }
 560