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         }
 289
 290         const char *ifname = NULL;
 291 #ifdef WITH_UBUS
 292         if (overwrite || !iface->ifname[0])
 293                 ifname = ubus_get_ifname(name);
 294 #endif
 295
 296         if (overwrite) {
 297                 if ((c = tb[IFACE_ATTR_IFNAME]))
 298                         ifname = blobmsg_get_string(c);
 299                 else if ((c = tb[IFACE_ATTR_NETWORKID]))
 300                         ifname = blobmsg_get_string(c);
 301         }
 302
 303         if (!iface->ifname[0] && !ifname)
 304                 return -1;
 305
 306         if (ifname)
 307                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
 308
 309         if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
 310                 return -1;
 311
 312         iface->inuse = true;
 313
 314         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
 315                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
 316
 317         if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
 318                 iface->ignore = blobmsg_get_bool(c);
 319
 320         if ((c = tb[IFACE_ATTR_LEASETIME])) {
 321                 char *val = blobmsg_get_string(c), *endptr;
 322                 double time = strtod(val, &endptr);
 323                 if (time && endptr[0]) {
 324                         if (endptr[0] == 's')
 325                                 time *= 1;
 326                         else if (endptr[0] == 'm')
 327                                 time *= 60;
 328                         else if (endptr[0] == 'h')
 329                                 time *= 3600;
 330                         else if (endptr[0] == 'd')
 331                                 time *= 24 * 3600;
 332                         else if (endptr[0] == 'w')
 333                                 time *= 7 * 24 * 3600;
 334                         else
 335                                 goto err;
 336                 }
 337
 338                 if (time >= 60)
 339                         iface->dhcpv4_leasetime = time;
 340         }
 341
 342         if ((c = tb[IFACE_ATTR_START])) {
 343                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
 344
 345                 if (config.legacy)
 346                         iface->dhcpv4 = RELAYD_SERVER;
 347         }
 348
 349         if ((c = tb[IFACE_ATTR_LIMIT]))
 350                 iface->dhcpv4_end.s_addr = htonl(
 351                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
 352
 353         if ((c = tb[IFACE_ATTR_MASTER]))
 354                 iface->master = blobmsg_get_bool(c);
 355
 356         if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
 357                 struct blob_attr *cur;
 358                 unsigned rem;
 359
 360                 blobmsg_for_each_attr(cur, c, rem) {
 361                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 362                                 continue;
 363
 364                         iface->upstream = realloc(iface->upstream,
 365                                         iface->upstream_len + blobmsg_data_len(cur));
 366                         if (!iface->upstream)
 367                                 goto err;
 368
 369                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
 370                         iface->upstream_len += blobmsg_data_len(cur);
 371                 }
 372         }
 373
 374         int mode;
 375         if ((c = tb[IFACE_ATTR_RA])) {
 376                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 377                         iface->ra = mode;
 378                 else
 379                         goto err;
 380         }
 381
 382         if ((c = tb[IFACE_ATTR_DHCPV4])) {
 383                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 384                         iface->dhcpv4 = mode;
 385                 else
 386                         goto err;
 387         }
 388
 389         if ((c = tb[IFACE_ATTR_DHCPV6])) {
 390                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 391                         iface->dhcpv6 = mode;
 392                 else
 393                         goto err;
 394         }
 395
 396         if ((c = tb[IFACE_ATTR_NDP])) {
 397                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 398                         iface->ndp = mode;
 399                 else
 400                         goto err;
 401         }
 402
 403         if ((c = tb[IFACE_ATTR_DNS])) {
 404                 struct blob_attr *cur;
 405                 unsigned rem;
 406
 407                 iface->always_rewrite_dns = true;
 408                 blobmsg_for_each_attr(cur, c, rem) {
 409                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 410                                 continue;
 411
 412                         struct in_addr addr4;
 413                         struct in6_addr addr6;
 414                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 415                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
 416                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
 417                                 if (!iface->dhcpv4_dns)
 418                                         goto err;
 419
 420                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
 421                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
 422                                 iface->dns = realloc(iface->dns,
 423                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
 424                                 if (!iface->dns)
 425                                         goto err;
 426
 427                                 iface->dns[iface->dns_cnt - 1] = addr6;
 428                         } else {
 429                                 goto err;
 430                         }
 431                 }
 432         }
 433
 434         if ((c = tb[IFACE_ATTR_DOMAIN])) {
 435                 struct blob_attr *cur;
 436                 unsigned rem;
 437
 438                 blobmsg_for_each_attr(cur, c, rem) {
 439                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 440                                 continue;
 441
 442                         uint8_t buf[256];
 443                         int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
 444                         if (len <= 0)
 445                                 goto err;
 446
 447                         iface->search = realloc(iface->search, iface->search_len + len);
 448                         if (!iface->search)
 449                                 goto err;
 450
 451                         memcpy(&iface->search[iface->search_len], buf, len);
 452                         iface->search_len += len;
 453                 }
 454         }
 455
 456         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
 457                 iface->default_router = blobmsg_get_u32(c);
 458
 459         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
 460                 iface->managed = blobmsg_get_u32(c);
 461         else if (overwrite)
 462                 iface->managed = 1;
 463
 464         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
 465                 iface->ra_not_onlink = blobmsg_get_bool(c);
 466
 467         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
 468                 const char *prio = blobmsg_get_string(c);
 469
 470                 if (!strcmp(prio, "high"))
 471                         iface->route_preference = 1;
 472                 else if (!strcmp(prio, "low"))
 473                         iface->route_preference = -1;
 474                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
 475                         iface->route_preference = 0;
 476                 else
 477                         goto err;
 478         }
 479
 480         if ((c = tb[IFACE_ATTR_PD_MANAGER]))
 481                 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
 482                                 sizeof(iface->dhcpv6_pd_manager) - 1);
 483
 484         if ((c = tb[IFACE_ATTR_PD_CER]) &&
 485                         inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
 486                 goto err;
 487
 488         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
 489                 iface->learn_routes = blobmsg_get_bool(c);
 490         else if (overwrite)
 491                 iface->learn_routes = true;
 492
 493         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
 494                 iface->external = blobmsg_get_bool(c);
 495
 496         if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
 497                 struct blob_attr *cur;
 498                 unsigned rem;
 499
 500                 blobmsg_for_each_attr(cur, c, rem) {
 501                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
 502                                 continue;
 503
 504                         int len = blobmsg_data_len(cur);
 505                         iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
 506                         if (!iface->static_ndp)
 507                                 goto err;
 508
 509                         if (iface->static_ndp_len)
 510                                 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
 511
 512                         memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
 513                         iface->static_ndp_len += len;
 514                 }
 515         }
 516
 517         return 0;
 518
 519 err:
 520         close_interface(iface);
 521         return -1;
 522 }
 523
 524 static int set_interface(struct uci_section *s)
 525 {
 526         blob_buf_init(&b, 0);
 527         uci_to_blob(&b, s, &interface_attr_list);
 528         return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
 529 }
 530
 531
 532 void odhcpd_reload(void)
 533 {
 534         struct uci_context *uci = uci_alloc_context();
 535         while (!list_empty(&leases)) {
 536                 struct lease *l = list_first_entry(&leases, struct lease, head);
 537                 list_del(&l->head);
 538                 free(l->duid);
 539                 free(l);
 540         }
 541
 542         struct interface *master = NULL, *i, *n;
 543
 544         if (!uci)
 545                 return;
 546
 547         list_for_each_entry(i, &interfaces, head)
 548                 clean_interface(i);
 549
 550         struct uci_package *dhcp = NULL;
 551         if (!uci_load(uci, "dhcp", &dhcp)) {
 552                 struct uci_element *e;
 553                 uci_foreach_element(&dhcp->sections, e) {
 554                         struct uci_section *s = uci_to_section(e);
 555                         if (!strcmp(s->type, "host"))
 556                                 set_lease(s);
 557                         else if (!strcmp(s->type, "odhcpd"))
 558                                 set_config(s);
 559                 }
 560
 561                 uci_foreach_element(&dhcp->sections, e) {
 562                         struct uci_section *s = uci_to_section(e);
 563                         if (!strcmp(s->type, "dhcp"))
 564                                 set_interface(s);
 565                 }
 566         }
 567
 568
 569 #ifdef WITH_UBUS
 570         ubus_apply_network();
 571 #endif
 572
 573         bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
 574
 575         // Test for
 576         list_for_each_entry(i, &interfaces, head) {
 577                 if (i->master)
 578                         continue;
 579
 580                 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
 581                         any_dhcpv6_slave = true;
 582
 583                 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
 584                         any_ra_slave = true;
 585
 586                 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
 587                         any_ndp_slave = true;
 588         }
 589
 590         // Evaluate hybrid mode for master
 591         list_for_each_entry(i, &interfaces, head) {
 592                 if (!i->master)
 593                         continue;
 594
 595                 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
 596 #ifdef WITH_UBUS
 597                 if (!ubus_has_prefix(i->name, i->ifname))
 598                         hybrid_mode = RELAYD_RELAY;
 599 #endif
 600
 601                 if (i->dhcpv6 == RELAYD_HYBRID)
 602                         i->dhcpv6 = hybrid_mode;
 603
 604                 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
 605                         i->dhcpv6 = RELAYD_DISABLED;
 606
 607                 if (i->ra == RELAYD_HYBRID)
 608                         i->ra = hybrid_mode;
 609
 610                 if (i->ra == RELAYD_RELAY && !any_ra_slave)
 611                         i->ra = RELAYD_DISABLED;
 612
 613                 if (i->ndp == RELAYD_HYBRID)
 614                         i->ndp = hybrid_mode;
 615
 616                 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
 617                         i->ndp = RELAYD_DISABLED;
 618
 619                 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
 620                         master = i;
 621         }
 622
 623
 624         list_for_each_entry_safe(i, n, &interfaces, head) {
 625                 if (i->inuse) {
 626                         // Resolve hybrid mode
 627                         if (i->dhcpv6 == RELAYD_HYBRID)
 628                                 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
 629                                                 RELAYD_RELAY : RELAYD_SERVER;
 630
 631                         if (i->ra == RELAYD_HYBRID)
 632                                 i->ra = (master && master->ra == RELAYD_RELAY) ?
 633                                                 RELAYD_RELAY : RELAYD_SERVER;
 634
 635                         if (i->ndp == RELAYD_HYBRID)
 636                                 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
 637                                                 RELAYD_RELAY : RELAYD_DISABLED;
 638
 639                         setup_router_interface(i, true);
 640                         setup_dhcpv6_interface(i, true);
 641                         setup_ndp_interface(i, true);
 642                         setup_dhcpv4_interface(i, true);
 643                 } else {
 644                         close_interface(i);
 645                 }
 646         }
 647
 648         uci_unload(uci, dhcp);
 649         uci_free_context(uci);
 650 }
 651
 652
 653 static void handle_signal(int signal)
 654 {
 655         char b[1] = {0};
 656         if (signal == SIGHUP)
 657                 write(reload_pipe[1], b, sizeof(b));
 658         else
 659                 uloop_end();
 660 }
 661
 662
 663
 664 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
 665 {
 666         char b[512];
 667         read(u->fd, b, sizeof(b));
 668         odhcpd_reload();
 669 }
 670
 671 static struct uloop_fd reload_fd = { .cb = reload_cb };
 672
 673 void odhcpd_run(void)
 674 {
 675         pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
 676         reload_fd.fd = reload_pipe[0];
 677         uloop_fd_add(&reload_fd, ULOOP_READ);
 678
 679         signal(SIGTERM, handle_signal);
 680         signal(SIGINT, handle_signal);
 681         signal(SIGHUP, handle_signal);
 682
 683 #ifdef WITH_UBUS
 684         while (init_ubus())
 685                 sleep(1);
 686 #endif
 687
 688         odhcpd_reload();
 689         uloop_run();
 690 }
 691