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_NETWORKID,
  19         IFACE_ATTR_DYNAMICDHCP,
  20         IFACE_ATTR_IGNORE,
  21         IFACE_ATTR_LEASETIME,
  22         IFACE_ATTR_LIMIT,
  23         IFACE_ATTR_START,
  24         IFACE_ATTR_MASTER,
  25         IFACE_ATTR_UPSTREAM,
  26         IFACE_ATTR_RA,
  27         IFACE_ATTR_DHCPV4,
  28         IFACE_ATTR_DHCPV6,
  29         IFACE_ATTR_NDP,
  30         IFACE_ATTR_DNS,
  31         IFACE_ATTR_DOMAIN,
  32         IFACE_ATTR_ULA_COMPAT,
  33         IFACE_ATTR_RA_DEFAULT,
  34         IFACE_ATTR_RA_MANAGEMENT,
  35         IFACE_ATTR_RA_OFFLINK,
  36         IFACE_ATTR_RA_PREFERENCE,
  37         IFACE_ATTR_NDPROXY_ROUTING,
  38         IFACE_ATTR_NDPROXY_SLAVE,
  39         IFACE_ATTR_NDPROXY_STATIC,
  40         IFACE_ATTR_MAX
  41 };
  42
  43 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  44         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  45         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  46         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
  47         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
  48         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
  49         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
  50         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
  51         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
  52         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
  53         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
  54         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
  55         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
  56         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
  57         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
  58         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  59         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
  60         [IFACE_ATTR_ULA_COMPAT] = { .name = "ula_compat", .type = BLOBMSG_TYPE_BOOL },
  61         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
  62         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
  63         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
  64         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
  65         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
  66         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
  67         [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
  68 };
  69
  70 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
  71         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
  72         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
  73         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
  74         [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
  75 };
  76
  77 const struct uci_blob_param_list interface_attr_list = {
  78         .n_params = IFACE_ATTR_MAX,
  79         .params = iface_attrs,
  80         .info = iface_attr_info,
  81 };
  82
  83
  84 enum {
  85         LEASE_ATTR_IP,
  86         LEASE_ATTR_MAC,
  87         LEASE_ATTR_DUID,
  88         LEASE_ATTR_HOSTID,
  89         LEASE_ATTR_HOSTNAME,
  90         LEASE_ATTR_MAX
  91 };
  92
  93
  94 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
  95         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
  96         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
  97         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
  98         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
  99         [LEASE_ATTR_HOSTNAME] = { .name = "hostname", .type = BLOBMSG_TYPE_STRING },
 100 };
 101
 102
 103 const struct uci_blob_param_list lease_attr_list = {
 104         .n_params = LEASE_ATTR_MAX,
 105         .params = lease_attrs,
 106 };
 107
 108
 109 enum {
 110         ODHCPD_ATTR_LEGACY,
 111         ODHCPD_ATTR_LEASEFILE,
 112         ODHCPD_ATTR_LEASETRIGGER,
 113         ODHCPD_ATTR_MAX
 114 };
 115
 116
 117 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
 118         [ODHCPD_ATTR_LEGACY] = { .name = "legacy", .type = BLOBMSG_TYPE_BOOL },
 119         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
 120         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
 121 };
 122
 123
 124 const struct uci_blob_param_list odhcpd_attr_list = {
 125         .n_params = ODHCPD_ATTR_MAX,
 126         .params = odhcpd_attrs,
 127 };
 128
 129
 130 static struct interface* get_interface(const char *name)
 131 {
 132         struct interface *c;
 133         list_for_each_entry(c, &interfaces, head)
 134                 if (!strcmp(c->name, name))
 135                         return c;
 136         return NULL;
 137 }
 138
 139
 140 static void clean_interface(struct interface *iface)
 141 {
 142         free(iface->dns);
 143         free(iface->search);
 144         free(iface->upstream);
 145         free(iface->static_ndp);
 146         free(iface->dhcpv4_dns);
 147         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
 148 }
 149
 150
 151 static void close_interface(struct interface *iface)
 152 {
 153         if (iface->head.next)
 154                 list_del(&iface->head);
 155
 156         setup_router_interface(iface, false);
 157         setup_dhcpv6_interface(iface, false);
 158         setup_ndp_interface(iface, false);
 159         setup_dhcpv4_interface(iface, false);
 160
 161         clean_interface(iface);
 162         free(iface);
 163 }
 164
 165
 166 static int parse_mode(const char *mode)
 167 {
 168         if (!strcmp(mode, "disabled")) {
 169                 return RELAYD_DISABLED;
 170         } else if (!strcmp(mode, "server")) {
 171                 return RELAYD_SERVER;
 172         } else if (!strcmp(mode, "relay")) {
 173                 return RELAYD_RELAY;
 174         } else if (!strcmp(mode, "hybrid")) {
 175                 return RELAYD_HYBRID;
 176         } else {
 177                 return -1;
 178         }
 179 }
 180
 181
 182 static void set_config(struct uci_section *s)
 183 {
 184         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
 185
 186         blob_buf_init(&b, 0);
 187         uci_to_blob(&b, s, &lease_attr_list);
 188         blobmsg_parse(lease_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 189
 190         if ((c = tb[ODHCPD_ATTR_LEGACY]))
 191                 config.legacy = blobmsg_get_bool(c);
 192
 193         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
 194                 free(config.dhcp_statefile);
 195                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
 196         }
 197
 198         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
 199                 free(config.dhcp_cb);
 200                 config.dhcp_cb = strdup(blobmsg_get_string(c));
 201         }
 202 }
 203
 204
 205 static int set_lease(struct uci_section *s)
 206 {
 207         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
 208
 209         blob_buf_init(&b, 0);
 210         uci_to_blob(&b, s, &lease_attr_list);
 211         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 212
 213         size_t hostlen = 1;
 214         if ((c = tb[LEASE_ATTR_HOSTNAME]))
 215                 hostlen = blobmsg_data_len(c);
 216
 217         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
 218
 219         if (hostlen > 1)
 220                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
 221
 222         if ((c = tb[LEASE_ATTR_IP]))
 223                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
 224                         goto err;
 225
 226         if ((c = tb[LEASE_ATTR_MAC]))
 227                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
 228                         goto err;
 229
 230         if ((c = tb[LEASE_ATTR_DUID])) {
 231                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
 232                 lease->duid = malloc(duidlen);
 233                 ssize_t len = odhcpd_unhexlify(lease->duid,
 234                                 duidlen, blobmsg_get_string(c));
 235
 236                 if (len < 0)
 237                         goto err;
 238
 239                 lease->duid_len = len;
 240         }
 241
 242         if ((c = tb[LEASE_ATTR_HOSTID]))
 243                 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
 244                                 blobmsg_get_string(c)) < 0)
 245                         goto err;
 246
 247         list_add(&lease->head, &leases);
 248         return 0;
 249
 250 err:
 251         free(lease->duid);
 252         free(lease);
 253         return -1;
 254 }
 255
 256
 257 int config_parse_interface(struct blob_attr *b, const char *name, bool overwrite)
 258 {
 259         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
 260         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(b), blob_len(b));
 261
 262         if (tb[IFACE_ATTR_INTERFACE])
 263                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
 264
 265         if (!name)
 266                 return -1;
 267
 268         struct interface *iface = get_interface(name);
 269         if (!iface) {
 270                 iface = calloc(1, sizeof(*iface));
 271                 strncpy(iface->name, name, sizeof(iface->name) - 1);
 272                 list_add(&iface->head, &interfaces);
 273         } else {
 274                 clean_interface(iface);
 275         }
 276
 277         const char *ifname = NULL;
 278 #ifdef WITH_UBUS
 279         if (overwrite)
 280                 ifname = ubus_get_ifname(name);
 281 #endif
 282         if ((c = tb[IFACE_ATTR_IFNAME]))
 283                 ifname = blobmsg_get_string(c);
 284         else if ((c = tb[IFACE_ATTR_NETWORKID]))
 285                 ifname = blobmsg_get_string(c);
 286
 287         if (!ifname)
 288                 return -1;
 289
 290         strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
 291         iface->inuse = true;
 292
 293         if (overwrite)
 294                 clean_interface(iface);
 295
 296         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
 297                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
 298
 299         if ((c = tb[IFACE_ATTR_IGNORE]))
 300                 iface->ignore = blobmsg_get_bool(c);
 301
 302         if ((c = tb[IFACE_ATTR_LEASETIME])) {
 303                 char *val = blobmsg_get_string(c), *endptr;
 304                 double time = strtod(val, &endptr);
 305                 if (time && endptr[0]) {
 306                         if (endptr[0] == 's')
 307                                 time *= 1;
 308                         else if (endptr[0] == 'm')
 309                                 time *= 60;
 310                         else if (endptr[0] == 'h')
 311                                 time *= 3600;
 312                         else if (endptr[0] == 'd')
 313                                 time *= 24 * 3600;
 314                         else if (endptr[0] == 'w')
 315                                 time *= 7 * 24 * 3600;
 316                         else
 317                                 goto err;
 318                 }
 319
 320                 if (time >= 60)
 321                         iface->dhcpv4_leasetime = time;
 322         }
 323
 324         if ((c = tb[IFACE_ATTR_START])) {
 325                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
 326
 327                 if (config.legacy)
 328                         iface->dhcpv4 = RELAYD_SERVER;
 329         }
 330
 331         if ((c = tb[IFACE_ATTR_LIMIT]))
 332                 iface->dhcpv4_end.s_addr = htonl(
 333                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
 334
 335         if ((c = tb[IFACE_ATTR_MASTER]))
 336                 iface->master = blobmsg_get_bool(c);
 337
 338         if ((c = tb[IFACE_ATTR_UPSTREAM])) {
 339                 struct blob_attr *cur;
 340                 unsigned rem;
 341
 342                 blobmsg_for_each_attr(cur, c, rem) {
 343                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 344                                 continue;
 345
 346                         iface->upstream = realloc(iface->upstream,
 347                                         iface->upstream_len + blobmsg_data_len(cur));
 348                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
 349                         iface->upstream_len += blobmsg_data_len(cur);
 350                 }
 351         }
 352
 353         int mode;
 354         if ((c = tb[IFACE_ATTR_RA])) {
 355                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 356                         iface->ra = mode;
 357                 else
 358                         goto err;
 359         }
 360
 361         if ((c = tb[IFACE_ATTR_DHCPV4])) {
 362                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 363                         iface->dhcpv4 = mode;
 364                 else
 365                         goto err;
 366         }
 367
 368         if ((c = tb[IFACE_ATTR_DHCPV6])) {
 369                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 370                         iface->dhcpv6 = mode;
 371                 else
 372                         goto err;
 373         }
 374
 375         if ((c = tb[IFACE_ATTR_NDP])) {
 376                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 377                         iface->ndp = mode;
 378                 else
 379                         goto err;
 380         }
 381
 382         if ((c = tb[IFACE_ATTR_DNS])) {
 383                 struct blob_attr *cur;
 384                 unsigned rem;
 385
 386                 iface->always_rewrite_dns = true;
 387                 blobmsg_for_each_attr(cur, c, rem) {
 388                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 389                                 continue;
 390
 391                         struct in_addr addr4;
 392                         struct in6_addr addr6;
 393                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 394                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
 395                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
 396                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
 397                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
 398                                 iface->dns = realloc(iface->dns,
 399                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
 400                                 iface->dns[iface->dns_cnt - 1] = addr6;
 401                         } else {
 402                                 goto err;
 403                         }
 404                 }
 405         }
 406
 407         if ((c = tb[IFACE_ATTR_DOMAIN])) {
 408                 struct blob_attr *cur;
 409                 unsigned rem;
 410
 411                 blobmsg_for_each_attr(cur, c, rem) {
 412                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 413                                 continue;
 414
 415                         uint8_t buf[256];
 416                         int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
 417                         if (len <= 0)
 418                                 goto err;
 419
 420                         iface->search = realloc(iface->search, iface->search_len + len);
 421                         memcpy(&iface->search[iface->search_len], buf, len);
 422                         iface->search_len += len;
 423                 }
 424         }
 425
 426         if ((c = tb[IFACE_ATTR_ULA_COMPAT]))
 427                 iface->deprecate_ula_if_public_avail = blobmsg_get_bool(c);
 428
 429         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
 430                 iface->default_router = blobmsg_get_u32(c);
 431
 432         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
 433                 iface->managed = blobmsg_get_u32(c);
 434
 435         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
 436                 iface->ra_not_onlink = blobmsg_get_bool(c);
 437
 438         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
 439                 const char *prio = blobmsg_get_string(c);
 440
 441                 if (!strcmp(prio, "high"))
 442                         iface->route_preference = 1;
 443                 else if (!strcmp(prio, "low"))
 444                         iface->route_preference = -1;
 445                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
 446                         iface->route_preference = 0;
 447                 else
 448                         goto err;
 449         }
 450
 451         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
 452                 iface->learn_routes = blobmsg_get_bool(c);
 453
 454         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
 455                 iface->external = blobmsg_get_bool(c);
 456
 457         if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
 458                 struct blob_attr *cur;
 459                 unsigned rem;
 460
 461                 blobmsg_for_each_attr(cur, c, rem) {
 462                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 463                                 continue;
 464
 465                         int len = blobmsg_data_len(cur);
 466                         iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
 467                         memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
 468                         iface->static_ndp_len += len;
 469                 }
 470         }
 471
 472         iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) < 0;
 473         return 0;
 474
 475 err:
 476         close_interface(iface);
 477         return -1;
 478 }
 479
 480 static int set_interface(struct uci_section *s)
 481 {
 482         blob_buf_init(&b, 0);
 483         uci_to_blob(&b, s, &interface_attr_list);
 484         return config_parse_interface(b.head, s->e.name, true);
 485 }
 486
 487
 488 static volatile int do_reload = false;
 489 static void set_stop(int signal)
 490 {
 491         uloop_end();
 492         do_reload = (signal == SIGHUP);
 493 }
 494
 495 void odhcpd_run(void)
 496 {
 497         struct uci_context *uci = uci_alloc_context();
 498         signal(SIGTERM, set_stop);
 499         signal(SIGHUP, set_stop);
 500         signal(SIGINT, set_stop);
 501
 502         do {
 503                 do_reload = uloop_cancelled = false;
 504
 505                 struct lease *l;
 506                 list_for_each_entry(l, &leases, head) {
 507                         list_del(&l->head);
 508                         free(l->duid);
 509                         free(l);
 510                 }
 511
 512                 struct uci_package *dhcp = NULL;
 513                 if (!uci_load(uci, "dhcp", &dhcp)) {
 514                         struct uci_element *e;
 515                         uci_foreach_element(&dhcp->sections, e) {
 516                                 struct uci_section *s = uci_to_section(e);
 517                                 if (!strcmp(s->type, "lease"))
 518                                         set_lease(s);
 519                                 else if (!strcmp(s->type, "odhcpd"))
 520                                         set_config(s);
 521                         }
 522
 523                         uci_foreach_element(&dhcp->sections, e) {
 524                                 struct uci_section *s = uci_to_section(e);
 525                                 if (!strcmp(s->type, "dhcp"))
 526                                         set_interface(s);
 527                         }
 528                 }
 529
 530 #ifdef WITH_UBUS
 531                 ubus_apply_network();
 532 #endif
 533
 534                 // Evaluate hybrid mode for master
 535                 struct interface *master = NULL, *i;
 536                 list_for_each_entry(i, &interfaces, head) {
 537                         if (!i->master)
 538                                 continue;
 539
 540                         enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
 541 #ifdef WITH_UBUS
 542                         if (ubus_has_prefix(i->name, i->ifname))
 543                                 hybrid_mode = RELAYD_RELAY;
 544 #endif
 545
 546                         if (i->dhcpv6 == RELAYD_HYBRID)
 547                                 i->dhcpv6 = hybrid_mode;
 548
 549                         if (i->ra == RELAYD_HYBRID)
 550                                 i->ra = hybrid_mode;
 551
 552                         if (i->ndp == RELAYD_HYBRID)
 553                                 i->ndp = hybrid_mode;
 554
 555                         if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
 556                                 master = i;
 557                 }
 558
 559
 560                 list_for_each_entry(i, &interfaces, head) {
 561                         if (i->inuse && !i->ignore) {
 562                                 // Resolve hybrid mode
 563                                 if (i->dhcpv6 == RELAYD_HYBRID)
 564                                         i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
 565                                                         RELAYD_RELAY : RELAYD_SERVER;
 566
 567                                 if (i->ra == RELAYD_HYBRID)
 568                                         i->ra = (master && master->ra == RELAYD_RELAY) ?
 569                                                         RELAYD_RELAY : RELAYD_SERVER;
 570
 571                                 if (i->ndp == RELAYD_HYBRID)
 572                                         i->ndp = (master && master->ndp == RELAYD_RELAY) ?
 573                                                         RELAYD_RELAY : RELAYD_SERVER;
 574
 575                                 setup_router_interface(i, true);
 576                                 setup_dhcpv6_interface(i, true);
 577                                 setup_ndp_interface(i, true);
 578                                 setup_dhcpv4_interface(i, true);
 579                         } else {
 580                                 close_interface(i);
 581                         }
 582                 }
 583
 584                 uloop_run();
 585
 586                 if (dhcp)
 587                         uci_unload(uci, dhcp);
 588         } while (do_reload);
 589 }
 590