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