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_RA_DEFAULT,
  36         IFACE_ATTR_RA_MANAGEMENT,
  37         IFACE_ATTR_RA_OFFLINK,
  38         IFACE_ATTR_RA_PREFERENCE,
  39         IFACE_ATTR_PD_MANAGER,
  40         IFACE_ATTR_PD_CER,
  41         IFACE_ATTR_NDPROXY_ROUTING,
  42         IFACE_ATTR_NDPROXY_SLAVE,
  43         IFACE_ATTR_NDPROXY_STATIC,
  44         IFACE_ATTR_MAX
  45 };
  46
  47 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  48         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  49         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  50         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
  51         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
  52         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
  53         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
  54         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
  55         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
  56         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
  57         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
  58         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
  59         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
  60         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
  61         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
  62         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  63         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
  64         [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
  65         [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
  66         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
  67         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
  68         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
  69         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
  70         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
  71         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
  72         [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
  73 };
  74
  75 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
  76         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
  77         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
  78         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
  79         [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
  80 };
  81
  82 const struct uci_blob_param_list interface_attr_list = {
  83         .n_params = IFACE_ATTR_MAX,
  84         .params = iface_attrs,
  85         .info = iface_attr_info,
  86 };
  87
  88
  89 enum {
  90         LEASE_ATTR_IP,
  91         LEASE_ATTR_MAC,
  92         LEASE_ATTR_DUID,
  93         LEASE_ATTR_HOSTID,
  94         LEASE_ATTR_NAME,
  95         LEASE_ATTR_MAX
  96 };
  97
  98
  99 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
 100         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
 101         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
 102         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
 103         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
 104         [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
 105 };
 106
 107
 108 const struct uci_blob_param_list lease_attr_list = {
 109         .n_params = LEASE_ATTR_MAX,
 110         .params = lease_attrs,
 111 };
 112
 113
 114 enum {
 115         ODHCPD_ATTR_MAINDHCP,
 116         ODHCPD_ATTR_LEASEFILE,
 117         ODHCPD_ATTR_LEASETRIGGER,
 118         ODHCPD_ATTR_MAX
 119 };
 120
 121
 122 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
 123         [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
 124         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
 125         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
 126 };
 127
 128
 129 const struct uci_blob_param_list odhcpd_attr_list = {
 130         .n_params = ODHCPD_ATTR_MAX,
 131         .params = odhcpd_attrs,
 132 };
 133
 134
 135 static struct interface* get_interface(const char *name)
 136 {
 137         struct interface *c;
 138         list_for_each_entry(c, &interfaces, head)
 139                 if (!strcmp(c->name, name))
 140                         return c;
 141         return NULL;
 142 }
 143
 144
 145 static void clean_interface(struct interface *iface)
 146 {
 147         free(iface->dns);
 148         free(iface->search);
 149         free(iface->upstream);
 150         free(iface->static_ndp);
 151         free(iface->dhcpv4_dns);
 152         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
 153 }
 154
 155
 156 static void close_interface(struct interface *iface)
 157 {
 158         if (iface->head.next)
 159                 list_del(&iface->head);
 160
 161         setup_router_interface(iface, false);
 162         setup_dhcpv6_interface(iface, false);
 163         setup_ndp_interface(iface, false);
 164         setup_dhcpv4_interface(iface, false);
 165
 166         clean_interface(iface);
 167         free(iface);
 168 }
 169
 170
 171 static int parse_mode(const char *mode)
 172 {
 173         if (!strcmp(mode, "disabled")) {
 174                 return RELAYD_DISABLED;
 175         } else if (!strcmp(mode, "server")) {
 176                 return RELAYD_SERVER;
 177         } else if (!strcmp(mode, "relay")) {
 178                 return RELAYD_RELAY;
 179         } else if (!strcmp(mode, "hybrid")) {
 180                 return RELAYD_HYBRID;
 181         } else {
 182                 return -1;
 183         }
 184 }
 185
 186
 187 static void set_config(struct uci_section *s)
 188 {
 189         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
 190
 191         blob_buf_init(&b, 0);
 192         uci_to_blob(&b, s, &odhcpd_attr_list);
 193         blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 194
 195         if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
 196                 config.legacy = blobmsg_get_bool(c);
 197
 198         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
 199                 free(config.dhcp_statefile);
 200                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
 201         }
 202
 203         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
 204                 free(config.dhcp_cb);
 205                 config.dhcp_cb = strdup(blobmsg_get_string(c));
 206         }
 207 }
 208
 209
 210 static int set_lease(struct uci_section *s)
 211 {
 212         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
 213
 214         blob_buf_init(&b, 0);
 215         uci_to_blob(&b, s, &lease_attr_list);
 216         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 217
 218         size_t hostlen = 1;
 219         if ((c = tb[LEASE_ATTR_NAME]))
 220                 hostlen = blobmsg_data_len(c);
 221
 222         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
 223         if (!lease)
 224                 goto err;
 225
 226         if (hostlen > 1)
 227                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
 228
 229         if ((c = tb[LEASE_ATTR_IP]))
 230                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
 231                         goto err;
 232
 233         if ((c = tb[LEASE_ATTR_MAC]))
 234                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
 235                         goto err;
 236
 237         if ((c = tb[LEASE_ATTR_DUID])) {
 238                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
 239                 lease->duid = malloc(duidlen);
 240                 if (!lease->duid)
 241                         goto err;
 242
 243                 ssize_t len = odhcpd_unhexlify(lease->duid,
 244                                 duidlen, blobmsg_get_string(c));
 245
 246                 if (len < 0)
 247                         goto err;
 248
 249                 lease->duid_len = len;
 250         }
 251
 252         if ((c = tb[LEASE_ATTR_HOSTID]))
 253                 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
 254                                 blobmsg_get_string(c)) < 0)
 255                         goto err;
 256
 257         list_add(&lease->head, &leases);
 258         return 0;
 259
 260 err:
 261         if (lease) {
 262                 free(lease->duid);
 263                 free(lease);
 264         }
 265         return -1;
 266 }
 267
 268
 269 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
 270 {
 271         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
 272         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
 273
 274         if (tb[IFACE_ATTR_INTERFACE])
 275                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
 276
 277         if (!name)
 278                 return -1;
 279
 280         struct interface *iface = get_interface(name);
 281         if (!iface) {
 282                 iface = calloc(1, sizeof(*iface));
 283                 if (!iface)
 284                         return -1;
 285
 286                 strncpy(iface->name, name, sizeof(iface->name) - 1);
 287                 list_add(&iface->head, &interfaces);
 288                 overwrite = true;
 289         }
 290
 291         const char *ifname = NULL;
 292 #ifdef WITH_UBUS
 293         if (overwrite || !iface->ifname[0])
 294                 ifname = ubus_get_ifname(name);
 295 #endif
 296
 297         if (overwrite) {
 298                 if ((c = tb[IFACE_ATTR_IFNAME]))
 299                         ifname = blobmsg_get_string(c);
 300                 else if ((c = tb[IFACE_ATTR_NETWORKID]))
 301                         ifname = blobmsg_get_string(c);
 302         }
 303
 304         if (!iface->ifname[0] && !ifname)
 305                 return -1;
 306
 307         if (ifname)
 308                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
 309
 310         if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
 311                 return -1;
 312
 313         iface->inuse = true;
 314
 315         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
 316                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
 317
 318         if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
 319                 iface->ignore = blobmsg_get_bool(c);
 320
 321         if ((c = tb[IFACE_ATTR_LEASETIME])) {
 322                 char *val = blobmsg_get_string(c), *endptr;
 323                 double time = strtod(val, &endptr);
 324                 if (time && endptr[0]) {
 325                         if (endptr[0] == 's')
 326                                 time *= 1;
 327                         else if (endptr[0] == 'm')
 328                                 time *= 60;
 329                         else if (endptr[0] == 'h')
 330                                 time *= 3600;
 331                         else if (endptr[0] == 'd')
 332                                 time *= 24 * 3600;
 333                         else if (endptr[0] == 'w')
 334                                 time *= 7 * 24 * 3600;
 335                         else
 336                                 goto err;
 337                 }
 338
 339                 if (time >= 60)
 340                         iface->dhcpv4_leasetime = time;
 341         }
 342
 343         if ((c = tb[IFACE_ATTR_START])) {
 344                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
 345
 346                 if (config.legacy)
 347                         iface->dhcpv4 = RELAYD_SERVER;
 348         }
 349
 350         if ((c = tb[IFACE_ATTR_LIMIT]))
 351                 iface->dhcpv4_end.s_addr = htonl(
 352                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
 353
 354         if ((c = tb[IFACE_ATTR_MASTER]))
 355                 iface->master = blobmsg_get_bool(c);
 356
 357         if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
 358                 struct blob_attr *cur;
 359                 unsigned rem;
 360
 361                 blobmsg_for_each_attr(cur, c, rem) {
 362                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 363                                 continue;
 364
 365                         iface->upstream = realloc(iface->upstream,
 366                                         iface->upstream_len + blobmsg_data_len(cur));
 367                         if (!iface->upstream)
 368                                 goto err;
 369
 370                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
 371                         iface->upstream_len += blobmsg_data_len(cur);
 372                 }
 373         }
 374
 375         int mode;
 376         if ((c = tb[IFACE_ATTR_RA])) {
 377                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 378                         iface->ra = mode;
 379                 else
 380                         goto err;
 381         }
 382
 383         if ((c = tb[IFACE_ATTR_DHCPV4])) {
 384                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 385                         iface->dhcpv4 = mode;
 386                 else
 387                         goto err;
 388         }
 389
 390         if ((c = tb[IFACE_ATTR_DHCPV6])) {
 391                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 392                         iface->dhcpv6 = mode;
 393                 else
 394                         goto err;
 395         }
 396
 397         if ((c = tb[IFACE_ATTR_NDP])) {
 398                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 399                         iface->ndp = mode;
 400                 else
 401                         goto err;
 402         }
 403
 404         if ((c = tb[IFACE_ATTR_DNS])) {
 405                 struct blob_attr *cur;
 406                 unsigned rem;
 407
 408                 iface->always_rewrite_dns = true;
 409                 blobmsg_for_each_attr(cur, c, rem) {
 410                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 411                                 continue;
 412
 413                         struct in_addr addr4;
 414                         struct in6_addr addr6;
 415                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 416                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
 417                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
 418                                 if (!iface->dhcpv4_dns)
 419                                         goto err;
 420
 421                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
 422                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
 423                                 iface->dns = realloc(iface->dns,
 424                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
 425                                 if (!iface->dns)
 426                                         goto err;
 427
 428                                 iface->dns[iface->dns_cnt - 1] = addr6;
 429                         } else {
 430                                 goto err;
 431                         }
 432                 }
 433         }
 434
 435         if ((c = tb[IFACE_ATTR_DOMAIN])) {
 436                 struct blob_attr *cur;
 437                 unsigned rem;
 438
 439                 blobmsg_for_each_attr(cur, c, rem) {
 440                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 441                                 continue;
 442
 443                         uint8_t buf[256];
 444                         int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
 445                         if (len <= 0)
 446                                 goto err;
 447
 448                         iface->search = realloc(iface->search, iface->search_len + len);
 449                         if (!iface->search)
 450                                 goto err;
 451
 452                         memcpy(&iface->search[iface->search_len], buf, len);
 453                         iface->search_len += len;
 454                 }
 455         }
 456
 457         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
 458                 iface->default_router = blobmsg_get_u32(c);
 459
 460         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
 461                 iface->managed = blobmsg_get_u32(c);
 462         else if (overwrite)
 463                 iface->managed = 1;
 464
 465         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
 466                 iface->ra_not_onlink = blobmsg_get_bool(c);
 467
 468         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
 469                 const char *prio = blobmsg_get_string(c);
 470
 471                 if (!strcmp(prio, "high"))
 472                         iface->route_preference = 1;
 473                 else if (!strcmp(prio, "low"))
 474                         iface->route_preference = -1;
 475                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
 476                         iface->route_preference = 0;
 477                 else
 478                         goto err;
 479         }
 480
 481         if ((c = tb[IFACE_ATTR_PD_MANAGER]))
 482                 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
 483                                 sizeof(iface->dhcpv6_pd_manager) - 1);
 484
 485         if ((c = tb[IFACE_ATTR_PD_CER]) &&
 486                         inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
 487                 goto err;
 488
 489         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
 490                 iface->learn_routes = blobmsg_get_bool(c);
 491         else if (overwrite)
 492                 iface->learn_routes = true;
 493
 494         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
 495                 iface->external = blobmsg_get_bool(c);
 496
 497         if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
 498                 struct blob_attr *cur;
 499                 unsigned rem;
 500
 501                 blobmsg_for_each_attr(cur, c, rem) {
 502                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 503                                 continue;
 504
 505                         int len = blobmsg_data_len(cur);
 506                         iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
 507                         if (!iface->static_ndp)
 508                                 goto err;
 509
 510                         if (iface->static_ndp_len)
 511                                 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
 512
 513                         memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
 514                         iface->static_ndp_len += len;
 515                 }
 516         }
 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