src/config.c

   1 #include <fcntl.h>
   2 #include <resolv.h>
   3 #include <signal.h>
   4 #include <arpa/inet.h>
   5 #include <unistd.h>
   6
   7 #include <uci.h>
   8 #include <uci_blob.h>
   9
  10 #include "odhcpd.h"
  11
  12 static struct blob_buf b;
  13 static int reload_pipe[2];
  14 struct list_head leases = LIST_HEAD_INIT(leases);
  15 struct list_head interfaces = LIST_HEAD_INIT(interfaces);
  16 struct config config = {false, NULL, NULL};
  17
  18 enum {
  19         IFACE_ATTR_INTERFACE,
  20         IFACE_ATTR_IFNAME,
  21         IFACE_ATTR_NETWORKID,
  22         IFACE_ATTR_DYNAMICDHCP,
  23         IFACE_ATTR_IGNORE,
  24         IFACE_ATTR_LEASETIME,
  25         IFACE_ATTR_LIMIT,
  26         IFACE_ATTR_START,
  27         IFACE_ATTR_MASTER,
  28         IFACE_ATTR_UPSTREAM,
  29         IFACE_ATTR_RA,
  30         IFACE_ATTR_DHCPV4,
  31         IFACE_ATTR_DHCPV6,
  32         IFACE_ATTR_NDP,
  33         IFACE_ATTR_DNS,
  34         IFACE_ATTR_DOMAIN,
  35         IFACE_ATTR_FILTER_CLASS,
  36         IFACE_ATTR_DHCPV6_RAW,
  37         IFACE_ATTR_RA_DEFAULT,
  38         IFACE_ATTR_RA_MANAGEMENT,
  39         IFACE_ATTR_RA_OFFLINK,
  40         IFACE_ATTR_RA_PREFERENCE,
  41         IFACE_ATTR_PD_MANAGER,
  42         IFACE_ATTR_PD_CER,
  43         IFACE_ATTR_NDPROXY_ROUTING,
  44         IFACE_ATTR_NDPROXY_SLAVE,
  45         IFACE_ATTR_MAX
  46 };
  47
  48 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  49         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  50         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  51         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
  52         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
  53         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
  54         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
  55         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
  56         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
  57         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
  58         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
  59         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
  60         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
  61         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
  62         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
  63         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  64         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
  65         [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
  66         [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
  67         [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
  68         [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
  69         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
  70         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
  71         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
  72         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
  73         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
  74         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
  75 };
  76
  77 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
  78         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
  79         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
  80         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
  81 };
  82
  83 const struct uci_blob_param_list interface_attr_list = {
  84         .n_params = IFACE_ATTR_MAX,
  85         .params = iface_attrs,
  86         .info = iface_attr_info,
  87 };
  88
  89
  90 enum {
  91         LEASE_ATTR_IP,
  92         LEASE_ATTR_MAC,
  93         LEASE_ATTR_DUID,
  94         LEASE_ATTR_HOSTID,
  95         LEASE_ATTR_NAME,
  96         LEASE_ATTR_MAX
  97 };
  98
  99
 100 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
 101         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
 102         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
 103         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
 104         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
 105         [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
 106 };
 107
 108
 109 const struct uci_blob_param_list lease_attr_list = {
 110         .n_params = LEASE_ATTR_MAX,
 111         .params = lease_attrs,
 112 };
 113
 114
 115 enum {
 116         ODHCPD_ATTR_MAINDHCP,
 117         ODHCPD_ATTR_LEASEFILE,
 118         ODHCPD_ATTR_LEASETRIGGER,
 119         ODHCPD_ATTR_MAX
 120 };
 121
 122
 123 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
 124         [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
 125         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
 126         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
 127 };
 128
 129
 130 const struct uci_blob_param_list odhcpd_attr_list = {
 131         .n_params = ODHCPD_ATTR_MAX,
 132         .params = odhcpd_attrs,
 133 };
 134
 135
 136 static struct interface* get_interface(const char *name)
 137 {
 138         struct interface *c;
 139         list_for_each_entry(c, &interfaces, head)
 140                 if (!strcmp(c->name, name))
 141                         return c;
 142         return NULL;
 143 }
 144
 145
 146 static void clean_interface(struct interface *iface)
 147 {
 148         free(iface->dns);
 149         free(iface->search);
 150         free(iface->upstream);
 151         free(iface->dhcpv4_dns);
 152         free(iface->dhcpv6_raw);
 153         free(iface->filter_class);
 154         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
 155 }
 156
 157
 158 static void close_interface(struct interface *iface)
 159 {
 160         if (iface->head.next)
 161                 list_del(&iface->head);
 162
 163         setup_router_interface(iface, false);
 164         setup_dhcpv6_interface(iface, false);
 165         setup_ndp_interface(iface, false);
 166         setup_dhcpv4_interface(iface, false);
 167
 168         clean_interface(iface);
 169         free(iface);
 170 }
 171
 172
 173 static int parse_mode(const char *mode)
 174 {
 175         if (!strcmp(mode, "disabled")) {
 176                 return RELAYD_DISABLED;
 177         } else if (!strcmp(mode, "server")) {
 178                 return RELAYD_SERVER;
 179         } else if (!strcmp(mode, "relay")) {
 180                 return RELAYD_RELAY;
 181         } else if (!strcmp(mode, "hybrid")) {
 182                 return RELAYD_HYBRID;
 183         } else {
 184                 return -1;
 185         }
 186 }
 187
 188
 189 static void set_config(struct uci_section *s)
 190 {
 191         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
 192
 193         blob_buf_init(&b, 0);
 194         uci_to_blob(&b, s, &odhcpd_attr_list);
 195         blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 196
 197         if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
 198                 config.legacy = blobmsg_get_bool(c);
 199
 200         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
 201                 free(config.dhcp_statefile);
 202                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
 203         }
 204
 205         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
 206                 free(config.dhcp_cb);
 207                 config.dhcp_cb = strdup(blobmsg_get_string(c));
 208         }
 209 }
 210
 211
 212 static int set_lease(struct uci_section *s)
 213 {
 214         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
 215
 216         blob_buf_init(&b, 0);
 217         uci_to_blob(&b, s, &lease_attr_list);
 218         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 219
 220         size_t hostlen = 1;
 221         if ((c = tb[LEASE_ATTR_NAME]))
 222                 hostlen = blobmsg_data_len(c);
 223
 224         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
 225         if (!lease)
 226                 goto err;
 227
 228         if (hostlen > 1)
 229                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
 230
 231         if ((c = tb[LEASE_ATTR_IP]))
 232                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
 233                         goto err;
 234
 235         if ((c = tb[LEASE_ATTR_MAC]))
 236                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
 237                         goto err;
 238
 239         if ((c = tb[LEASE_ATTR_DUID])) {
 240                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
 241                 lease->duid = malloc(duidlen);
 242                 if (!lease->duid)
 243                         goto err;
 244
 245                 ssize_t len = odhcpd_unhexlify(lease->duid,
 246                                 duidlen, blobmsg_get_string(c));
 247
 248                 if (len < 0)
 249                         goto err;
 250
 251                 lease->duid_len = len;
 252         }
 253
 254         if ((c = tb[LEASE_ATTR_HOSTID])) {
 255                 errno = 0;
 256                 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
 257                 if (errno)
 258                         goto err;
 259         }
 260
 261         list_add(&lease->head, &leases);
 262         return 0;
 263
 264 err:
 265         if (lease) {
 266                 free(lease->duid);
 267                 free(lease);
 268         }
 269         return -1;
 270 }
 271
 272
 273 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
 274 {
 275         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
 276         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
 277
 278         if (tb[IFACE_ATTR_INTERFACE])
 279                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
 280
 281         if (!name)
 282                 return -1;
 283
 284         struct interface *iface = get_interface(name);
 285         if (!iface) {
 286                 iface = calloc(1, sizeof(*iface));
 287                 if (!iface)
 288                         return -1;
 289
 290                 strncpy(iface->name, name, sizeof(iface->name) - 1);
 291                 list_add(&iface->head, &interfaces);
 292                 overwrite = true;
 293         }
 294
 295         const char *ifname = NULL;
 296 #ifdef WITH_UBUS
 297         if (overwrite || !iface->ifname[0])
 298                 ifname = ubus_get_ifname(name);
 299 #endif
 300
 301         if (overwrite) {
 302                 if ((c = tb[IFACE_ATTR_IFNAME]))
 303                         ifname = blobmsg_get_string(c);
 304                 else if ((c = tb[IFACE_ATTR_NETWORKID]))
 305                         ifname = blobmsg_get_string(c);
 306         }
 307
 308         if (!iface->ifname[0] && !ifname)
 309                 return -1;
 310
 311         if (ifname)
 312                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
 313
 314         if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
 315                 return -1;
 316
 317         iface->inuse = true;
 318
 319         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
 320                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
 321
 322         if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
 323                 iface->ignore = blobmsg_get_bool(c);
 324
 325         if ((c = tb[IFACE_ATTR_LEASETIME])) {
 326                 char *val = blobmsg_get_string(c), *endptr;
 327                 double time = strtod(val, &endptr);
 328                 if (time && endptr[0]) {
 329                         if (endptr[0] == 's')
 330                                 time *= 1;
 331                         else if (endptr[0] == 'm')
 332                                 time *= 60;
 333                         else if (endptr[0] == 'h')
 334                                 time *= 3600;
 335                         else if (endptr[0] == 'd')
 336                                 time *= 24 * 3600;
 337                         else if (endptr[0] == 'w')
 338                                 time *= 7 * 24 * 3600;
 339                         else
 340                                 goto err;
 341                 }
 342
 343                 if (time >= 60)
 344                         iface->dhcpv4_leasetime = time;
 345         }
 346
 347         if ((c = tb[IFACE_ATTR_START])) {
 348                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
 349
 350                 if (config.legacy)
 351                         iface->dhcpv4 = RELAYD_SERVER;
 352         }
 353
 354         if ((c = tb[IFACE_ATTR_LIMIT]))
 355                 iface->dhcpv4_end.s_addr = htonl(
 356                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
 357
 358         if ((c = tb[IFACE_ATTR_MASTER]))
 359                 iface->master = blobmsg_get_bool(c);
 360
 361         if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
 362                 struct blob_attr *cur;
 363                 unsigned rem;
 364
 365                 blobmsg_for_each_attr(cur, c, rem) {
 366                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 367                                 continue;
 368
 369                         iface->upstream = realloc(iface->upstream,
 370                                         iface->upstream_len + blobmsg_data_len(cur));
 371                         if (!iface->upstream)
 372                                 goto err;
 373
 374                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
 375                         iface->upstream_len += blobmsg_data_len(cur);
 376                 }
 377         }
 378
 379         int mode;
 380         if ((c = tb[IFACE_ATTR_RA])) {
 381                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 382                         iface->ra = mode;
 383                 else
 384                         goto err;
 385         }
 386
 387         if ((c = tb[IFACE_ATTR_DHCPV4])) {
 388                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 389                         iface->dhcpv4 = mode;
 390                 else
 391                         goto err;
 392         }
 393
 394         if ((c = tb[IFACE_ATTR_DHCPV6])) {
 395                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 396                         iface->dhcpv6 = mode;
 397                 else
 398                         goto err;
 399         }
 400
 401         if ((c = tb[IFACE_ATTR_NDP])) {
 402                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 403                         iface->ndp = mode;
 404                 else
 405                         goto err;
 406         }
 407
 408         if ((c = tb[IFACE_ATTR_DNS])) {
 409                 struct blob_attr *cur;
 410                 unsigned rem;
 411
 412                 iface->always_rewrite_dns = true;
 413                 blobmsg_for_each_attr(cur, c, rem) {
 414                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 415                                 continue;
 416
 417                         struct in_addr addr4;
 418                         struct in6_addr addr6;
 419                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 420                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
 421                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
 422                                 if (!iface->dhcpv4_dns)
 423                                         goto err;
 424
 425                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
 426                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
 427                                 iface->dns = realloc(iface->dns,
 428                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
 429                                 if (!iface->dns)
 430                                         goto err;
 431
 432                                 iface->dns[iface->dns_cnt - 1] = addr6;
 433                         } else {
 434                                 goto err;
 435                         }
 436                 }
 437         }
 438
 439         if ((c = tb[IFACE_ATTR_DOMAIN])) {
 440                 struct blob_attr *cur;
 441                 unsigned rem;
 442
 443                 blobmsg_for_each_attr(cur, c, rem) {
 444                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 445                                 continue;
 446
 447                         uint8_t buf[256];
 448                         char *domain = blobmsg_get_string(cur);
 449                         size_t domainlen = strlen(domain);
 450                         if (domainlen > 0 && domain[domainlen - 1] == '.')
 451                                 domain[domainlen - 1] = 0;
 452
 453                         int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
 454                         free(domain);
 455                         if (len <= 0)
 456                                 goto err;
 457
 458                         iface->search = realloc(iface->search, iface->search_len + len);
 459                         if (!iface->search)
 460                                 goto err;
 461
 462                         memcpy(&iface->search[iface->search_len], buf, len);
 463                         iface->search_len += len;
 464                 }
 465         }
 466
 467         if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
 468                 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
 469                 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
 470         }
 471
 472         if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
 473                 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
 474                 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
 475                 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
 476         }
 477
 478         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
 479                 iface->default_router = blobmsg_get_u32(c);
 480
 481         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
 482                 iface->managed = blobmsg_get_u32(c);
 483         else if (overwrite)
 484                 iface->managed = 1;
 485
 486         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
 487                 iface->ra_not_onlink = blobmsg_get_bool(c);
 488
 489         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
 490                 const char *prio = blobmsg_get_string(c);
 491
 492                 if (!strcmp(prio, "high"))
 493                         iface->route_preference = 1;
 494                 else if (!strcmp(prio, "low"))
 495                         iface->route_preference = -1;
 496                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
 497                         iface->route_preference = 0;
 498                 else
 499                         goto err;
 500         }
 501
 502         if ((c = tb[IFACE_ATTR_PD_MANAGER]))
 503                 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
 504                                 sizeof(iface->dhcpv6_pd_manager) - 1);
 505
 506         if ((c = tb[IFACE_ATTR_PD_CER]) &&
 507                         inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
 508                 goto err;
 509
 510         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
 511                 iface->learn_routes = blobmsg_get_bool(c);
 512         else if (overwrite)
 513                 iface->learn_routes = true;
 514
 515         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
 516                 iface->external = blobmsg_get_bool(c);
 517
 518         return 0;
 519
 520 err:
 521         close_interface(iface);
 522         return -1;
 523 }
 524
 525 static int set_interface(struct uci_section *s)
 526 {
 527         blob_buf_init(&b, 0);
 528         uci_to_blob(&b, s, &interface_attr_list);
 529         return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
 530 }
 531
 532
 533 void odhcpd_reload(void)
 534 {
 535         struct uci_context *uci = uci_alloc_context();
 536         while (!list_empty(&leases)) {
 537                 struct lease *l = list_first_entry(&leases, struct lease, head);
 538                 list_del(&l->head);
 539                 free(l->duid);
 540                 free(l);
 541         }
 542
 543         struct interface *master = NULL, *i, *n;
 544
 545         if (!uci)
 546                 return;
 547
 548         list_for_each_entry(i, &interfaces, head)
 549                 clean_interface(i);
 550
 551         struct uci_package *dhcp = NULL;
 552         if (!uci_load(uci, "dhcp", &dhcp)) {
 553                 struct uci_element *e;
 554                 uci_foreach_element(&dhcp->sections, e) {
 555                         struct uci_section *s = uci_to_section(e);
 556                         if (!strcmp(s->type, "host"))
 557                                 set_lease(s);
 558                         else if (!strcmp(s->type, "odhcpd"))
 559                                 set_config(s);
 560                 }
 561
 562                 uci_foreach_element(&dhcp->sections, e) {
 563                         struct uci_section *s = uci_to_section(e);
 564                         if (!strcmp(s->type, "dhcp"))
 565                                 set_interface(s);
 566                 }
 567         }
 568
 569
 570 #ifdef WITH_UBUS
 571         ubus_apply_network();
 572 #endif
 573
 574         bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
 575
 576         // Test for
 577         list_for_each_entry(i, &interfaces, head) {
 578                 if (i->master)
 579                         continue;
 580
 581                 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
 582                         any_dhcpv6_slave = true;
 583
 584                 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
 585                         any_ra_slave = true;
 586
 587                 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
 588                         any_ndp_slave = true;
 589         }
 590
 591         // Evaluate hybrid mode for master
 592         list_for_each_entry(i, &interfaces, head) {
 593                 if (!i->master)
 594                         continue;
 595
 596                 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
 597 #ifdef WITH_UBUS
 598                 if (!ubus_has_prefix(i->name, i->ifname))
 599                         hybrid_mode = RELAYD_RELAY;
 600 #endif
 601
 602                 if (i->dhcpv6 == RELAYD_HYBRID)
 603                         i->dhcpv6 = hybrid_mode;
 604
 605                 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
 606                         i->dhcpv6 = RELAYD_DISABLED;
 607
 608                 if (i->ra == RELAYD_HYBRID)
 609                         i->ra = hybrid_mode;
 610
 611                 if (i->ra == RELAYD_RELAY && !any_ra_slave)
 612                         i->ra = RELAYD_DISABLED;
 613
 614                 if (i->ndp == RELAYD_HYBRID)
 615                         i->ndp = hybrid_mode;
 616
 617                 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
 618                         i->ndp = RELAYD_DISABLED;
 619
 620                 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
 621                         master = i;
 622         }
 623
 624
 625         list_for_each_entry_safe(i, n, &interfaces, head) {
 626                 if (i->inuse) {
 627                         // Resolve hybrid mode
 628                         if (i->dhcpv6 == RELAYD_HYBRID)
 629                                 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
 630                                                 RELAYD_RELAY : RELAYD_SERVER;
 631
 632                         if (i->ra == RELAYD_HYBRID)
 633                                 i->ra = (master && master->ra == RELAYD_RELAY) ?
 634                                                 RELAYD_RELAY : RELAYD_SERVER;
 635
 636                         if (i->ndp == RELAYD_HYBRID)
 637                                 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
 638                                                 RELAYD_RELAY : RELAYD_DISABLED;
 639
 640                         setup_router_interface(i, true);
 641                         setup_dhcpv6_interface(i, true);
 642                         setup_ndp_interface(i, true);
 643                         setup_dhcpv4_interface(i, true);
 644                 } else {
 645                         close_interface(i);
 646                 }
 647         }
 648
 649         uci_unload(uci, dhcp);
 650         uci_free_context(uci);
 651 }
 652
 653
 654 static void handle_signal(int signal)
 655 {
 656         char b[1] = {0};
 657         if (signal == SIGHUP)
 658                 write(reload_pipe[1], b, sizeof(b));
 659         else
 660                 uloop_end();
 661 }
 662
 663
 664
 665 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
 666 {
 667         char b[512];
 668         read(u->fd, b, sizeof(b));
 669         odhcpd_reload();
 670 }
 671
 672 static struct uloop_fd reload_fd = { .cb = reload_cb };
 673
 674 void odhcpd_run(void)
 675 {
 676         pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
 677         reload_fd.fd = reload_pipe[0];
 678         uloop_fd_add(&reload_fd, ULOOP_READ);
 679
 680         signal(SIGTERM, handle_signal);
 681         signal(SIGINT, handle_signal);
 682         signal(SIGHUP, handle_signal);
 683
 684 #ifdef WITH_UBUS
 685         while (init_ubus())
 686                 sleep(1);
 687 #endif
 688
 689         odhcpd_reload();
 690         uloop_run();
 691 }
 692