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 #include <libgen.h>
   7 #include <string.h>
   8 #include <sys/stat.h>
   9
  10 #include <uci.h>
  11 #include <uci_blob.h>
  12
  13 #include "odhcpd.h"
  14
  15 static struct blob_buf b;
  16 static int reload_pipe[2];
  17 struct list_head leases = LIST_HEAD_INIT(leases);
  18 struct list_head interfaces = LIST_HEAD_INIT(interfaces);
  19 struct config config = {false, NULL, NULL};
  20
  21 enum {
  22         IFACE_ATTR_INTERFACE,
  23         IFACE_ATTR_IFNAME,
  24         IFACE_ATTR_NETWORKID,
  25         IFACE_ATTR_DYNAMICDHCP,
  26         IFACE_ATTR_IGNORE,
  27         IFACE_ATTR_LEASETIME,
  28         IFACE_ATTR_LIMIT,
  29         IFACE_ATTR_START,
  30         IFACE_ATTR_MASTER,
  31         IFACE_ATTR_UPSTREAM,
  32         IFACE_ATTR_RA,
  33         IFACE_ATTR_DHCPV4,
  34         IFACE_ATTR_DHCPV6,
  35         IFACE_ATTR_NDP,
  36         IFACE_ATTR_ROUTER,
  37         IFACE_ATTR_DNS,
  38         IFACE_ATTR_DOMAIN,
  39         IFACE_ATTR_FILTER_CLASS,
  40         IFACE_ATTR_DHCPV6_RAW,
  41         IFACE_ATTR_RA_DEFAULT,
  42         IFACE_ATTR_RA_MANAGEMENT,
  43         IFACE_ATTR_RA_OFFLINK,
  44         IFACE_ATTR_RA_PREFERENCE,
  45         IFACE_ATTR_RA_ADVROUTER,
  46         IFACE_ATTR_RA_MAXINTERVAL,
  47         IFACE_ATTR_PD_MANAGER,
  48         IFACE_ATTR_PD_CER,
  49         IFACE_ATTR_NDPROXY_ROUTING,
  50         IFACE_ATTR_NDPROXY_SLAVE,
  51         IFACE_ATTR_MAX
  52 };
  53
  54 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
  55         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
  56         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
  57         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
  58         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
  59         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
  60         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
  61         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
  62         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
  63         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
  64         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
  65         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
  66         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
  67         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
  68         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
  69         [IFACE_ATTR_ROUTER] = { .name = "router", .type = BLOBMSG_TYPE_ARRAY },
  70         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
  71         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
  72         [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
  73         [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
  74         [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
  75         [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
  76         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
  77         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
  78         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
  79         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
  80         [IFACE_ATTR_RA_ADVROUTER] = { .name = "ra_advrouter", .type = BLOBMSG_TYPE_BOOL },
  81         [IFACE_ATTR_RA_MAXINTERVAL] = { .name = "ra_maxinterval", .type = BLOBMSG_TYPE_INT32 },
  82         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
  83         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
  84 };
  85
  86 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
  87         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
  88         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
  89         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
  90 };
  91
  92 const struct uci_blob_param_list interface_attr_list = {
  93         .n_params = IFACE_ATTR_MAX,
  94         .params = iface_attrs,
  95         .info = iface_attr_info,
  96 };
  97
  98 enum {
  99         LEASE_ATTR_IP,
 100         LEASE_ATTR_MAC,
 101         LEASE_ATTR_DUID,
 102         LEASE_ATTR_HOSTID,
 103         LEASE_ATTR_LEASETIME,
 104         LEASE_ATTR_NAME,
 105         LEASE_ATTR_MAX
 106 };
 107
 108 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
 109         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
 110         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
 111         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
 112         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
 113         [LEASE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
 114         [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
 115 };
 116
 117 const struct uci_blob_param_list lease_attr_list = {
 118         .n_params = LEASE_ATTR_MAX,
 119         .params = lease_attrs,
 120 };
 121
 122 enum {
 123         ODHCPD_ATTR_MAINDHCP,
 124         ODHCPD_ATTR_LEASEFILE,
 125         ODHCPD_ATTR_LEASETRIGGER,
 126         ODHCPD_ATTR_MAX
 127 };
 128
 129 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
 130         [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
 131         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
 132         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
 133 };
 134
 135 const struct uci_blob_param_list odhcpd_attr_list = {
 136         .n_params = ODHCPD_ATTR_MAX,
 137         .params = odhcpd_attrs,
 138 };
 139
 140 static int mkdir_p(char *dir, mode_t mask)
 141 {
 142         char *l = strrchr(dir, '/');
 143         int ret;
 144
 145         if (!l)
 146                 return 0;
 147
 148         *l = '\0';
 149
 150         if (mkdir_p(dir, mask))
 151                 return -1;
 152
 153         *l = '/';
 154
 155         ret = mkdir(dir, mask);
 156         if (ret && errno == EEXIST)
 157                 return 0;
 158
 159         if (ret)
 160                 syslog(LOG_ERR, "mkdir(%s, %d) failed: %s\n", dir, mask, strerror(errno));
 161
 162         return ret;
 163 }
 164
 165 static struct interface* get_interface(const char *name)
 166 {
 167         struct interface *c;
 168         list_for_each_entry(c, &interfaces, head)
 169                 if (!strcmp(c->name, name))
 170                         return c;
 171         return NULL;
 172 }
 173
 174 static void clean_interface(struct interface *iface)
 175 {
 176         free(iface->dns);
 177         free(iface->search);
 178         free(iface->upstream);
 179         free(iface->dhcpv4_router);
 180         free(iface->dhcpv4_dns);
 181         free(iface->dhcpv6_raw);
 182         free(iface->filter_class);
 183         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
 184 }
 185
 186 static void close_interface(struct interface *iface)
 187 {
 188         if (iface->head.next)
 189                 list_del(&iface->head);
 190
 191         setup_router_interface(iface, false);
 192         setup_dhcpv6_interface(iface, false);
 193         setup_ndp_interface(iface, false);
 194         setup_dhcpv4_interface(iface, false);
 195
 196         clean_interface(iface);
 197         free(iface);
 198 }
 199
 200 static int parse_mode(const char *mode)
 201 {
 202         if (!strcmp(mode, "disabled"))
 203                 return RELAYD_DISABLED;
 204         else if (!strcmp(mode, "server"))
 205                 return RELAYD_SERVER;
 206         else if (!strcmp(mode, "relay"))
 207                 return RELAYD_RELAY;
 208         else if (!strcmp(mode, "hybrid"))
 209                 return RELAYD_HYBRID;
 210         else
 211                 return -1;
 212 }
 213
 214 static void set_config(struct uci_section *s)
 215 {
 216         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
 217
 218         blob_buf_init(&b, 0);
 219         uci_to_blob(&b, s, &odhcpd_attr_list);
 220         blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 221
 222         if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
 223                 config.legacy = blobmsg_get_bool(c);
 224
 225         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
 226                 free(config.dhcp_statefile);
 227                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
 228         }
 229
 230         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
 231                 free(config.dhcp_cb);
 232                 config.dhcp_cb = strdup(blobmsg_get_string(c));
 233         }
 234 }
 235
 236 static double parse_leasetime(struct blob_attr *c) {
 237         char *val = blobmsg_get_string(c), *endptr = NULL;
 238         double time = strcmp(val, "infinite") ? strtod(val, &endptr) : UINT32_MAX;
 239
 240         if (time && endptr && endptr[0]) {
 241                 if (endptr[0] == 's')
 242                         time *= 1;
 243                 else if (endptr[0] == 'm')
 244                         time *= 60;
 245                 else if (endptr[0] == 'h')
 246                         time *= 3600;
 247                 else if (endptr[0] == 'd')
 248                         time *= 24 * 3600;
 249                 else if (endptr[0] == 'w')
 250                         time *= 7 * 24 * 3600;
 251                 else
 252                         goto err;
 253         }
 254
 255         if (time >= 60)
 256                 return time;
 257
 258         return 0;
 259
 260 err:
 261         return -1;
 262 }
 263
 264 static int set_lease(struct uci_section *s)
 265 {
 266         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
 267
 268         blob_buf_init(&b, 0);
 269         uci_to_blob(&b, s, &lease_attr_list);
 270         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
 271
 272         size_t hostlen = 1;
 273         if ((c = tb[LEASE_ATTR_NAME]))
 274                 hostlen = blobmsg_data_len(c);
 275
 276         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
 277         if (!lease)
 278                 goto err;
 279
 280         if (hostlen > 1)
 281                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
 282
 283         if ((c = tb[LEASE_ATTR_IP]))
 284                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
 285                         goto err;
 286
 287         if ((c = tb[LEASE_ATTR_MAC]))
 288                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
 289                         goto err;
 290
 291         if ((c = tb[LEASE_ATTR_DUID])) {
 292                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
 293                 lease->duid = malloc(duidlen);
 294                 if (!lease->duid)
 295                         goto err;
 296
 297                 ssize_t len = odhcpd_unhexlify(lease->duid,
 298                                 duidlen, blobmsg_get_string(c));
 299
 300                 if (len < 0)
 301                         goto err;
 302
 303                 lease->duid_len = len;
 304         }
 305
 306         if ((c = tb[LEASE_ATTR_HOSTID])) {
 307                 errno = 0;
 308                 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
 309                 if (errno)
 310                         goto err;
 311         }
 312
 313         if ((c = tb[LEASE_ATTR_LEASETIME])) {
 314                 double time = parse_leasetime(c);
 315                 if (time < 0)
 316                         goto err;
 317
 318                 if (time >= 60)
 319                         lease->dhcpv4_leasetime = time;
 320         }
 321
 322         list_add(&lease->head, &leases);
 323         return 0;
 324
 325 err:
 326         if (lease) {
 327                 free(lease->duid);
 328                 free(lease);
 329         }
 330         return -1;
 331 }
 332
 333 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
 334 {
 335         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
 336         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
 337
 338         if (tb[IFACE_ATTR_INTERFACE])
 339                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
 340
 341         if (!name)
 342                 return -1;
 343
 344         struct interface *iface = get_interface(name);
 345         if (!iface) {
 346                 iface = calloc(1, sizeof(*iface));
 347                 if (!iface)
 348                         return -1;
 349
 350                 strncpy(iface->name, name, sizeof(iface->name) - 1);
 351
 352                 /* Default settings */
 353                 iface->managed = 1;
 354                 iface->learn_routes = true;
 355
 356                 list_add(&iface->head, &interfaces);
 357                 overwrite = true;
 358         }
 359
 360         const char *ifname = NULL;
 361         if (overwrite) {
 362                 if ((c = tb[IFACE_ATTR_IFNAME]))
 363                         ifname = blobmsg_get_string(c);
 364                 else if ((c = tb[IFACE_ATTR_NETWORKID]))
 365                         ifname = blobmsg_get_string(c);
 366         }
 367
 368 #ifdef WITH_UBUS
 369         if (overwrite || !iface->ifname[0])
 370                 ifname = ubus_get_ifname(name);
 371 #endif
 372
 373         if (!iface->ifname[0] && !ifname)
 374                 goto err;
 375
 376         if (ifname)
 377                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
 378
 379         if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
 380                 goto err;
 381
 382         iface->inuse = true;
 383
 384         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
 385                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
 386
 387         if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
 388                 iface->ignore = blobmsg_get_bool(c);
 389
 390         if ((c = tb[IFACE_ATTR_LEASETIME])) {
 391                 double time = parse_leasetime(c);
 392                 if (time < 0)
 393                         goto err;
 394
 395                 if (time >= 60)
 396                         iface->dhcpv4_leasetime = time;
 397         }
 398
 399         if ((c = tb[IFACE_ATTR_START])) {
 400                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
 401
 402                 if (config.legacy)
 403                         iface->dhcpv4 = RELAYD_SERVER;
 404         }
 405
 406         if ((c = tb[IFACE_ATTR_LIMIT]))
 407                 iface->dhcpv4_end.s_addr = htonl(
 408                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
 409
 410         if ((c = tb[IFACE_ATTR_MASTER]))
 411                 iface->master = blobmsg_get_bool(c);
 412
 413         if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
 414                 struct blob_attr *cur;
 415                 unsigned rem;
 416
 417                 blobmsg_for_each_attr(cur, c, rem) {
 418                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
 419                                 continue;
 420
 421                         iface->upstream = realloc(iface->upstream,
 422                                         iface->upstream_len + blobmsg_data_len(cur));
 423                         if (!iface->upstream)
 424                                 goto err;
 425
 426                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
 427                         iface->upstream_len += blobmsg_data_len(cur);
 428                 }
 429         }
 430
 431         int mode;
 432         if ((c = tb[IFACE_ATTR_RA])) {
 433                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 434                         iface->ra = mode;
 435                 else
 436                         goto err;
 437         }
 438
 439         if ((c = tb[IFACE_ATTR_DHCPV4])) {
 440                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 441                         iface->dhcpv4 = mode;
 442                 else
 443                         goto err;
 444         }
 445
 446         if ((c = tb[IFACE_ATTR_DHCPV6])) {
 447                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 448                         iface->dhcpv6 = mode;
 449                 else
 450                         goto err;
 451         }
 452
 453         if ((c = tb[IFACE_ATTR_NDP])) {
 454                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
 455                         iface->ndp = mode;
 456                 else
 457                         goto err;
 458         }
 459
 460         if ((c = tb[IFACE_ATTR_ROUTER])) {
 461                 struct blob_attr *cur;
 462                 unsigned rem;
 463
 464                 blobmsg_for_each_attr(cur, c, rem) {
 465                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
 466                                 continue;
 467
 468                         struct in_addr addr4;
 469                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 470                                 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
 471                                                 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
 472                                 if (!iface->dhcpv4_router)
 473                                         goto err;
 474
 475                                 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
 476                         } else
 477                                 goto err;
 478                 }
 479         }
 480
 481         if ((c = tb[IFACE_ATTR_DNS])) {
 482                 struct blob_attr *cur;
 483                 unsigned rem;
 484
 485                 iface->always_rewrite_dns = true;
 486                 blobmsg_for_each_attr(cur, c, rem) {
 487                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
 488                                 continue;
 489
 490                         struct in_addr addr4;
 491                         struct in6_addr addr6;
 492                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
 493                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
 494                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
 495                                 if (!iface->dhcpv4_dns)
 496                                         goto err;
 497
 498                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
 499                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
 500                                 iface->dns = realloc(iface->dns,
 501                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
 502                                 if (!iface->dns)
 503                                         goto err;
 504
 505                                 iface->dns[iface->dns_cnt - 1] = addr6;
 506                         } else
 507                                 goto err;
 508                 }
 509         }
 510
 511         if ((c = tb[IFACE_ATTR_DOMAIN])) {
 512                 struct blob_attr *cur;
 513                 unsigned rem;
 514
 515                 blobmsg_for_each_attr(cur, c, rem) {
 516                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
 517                                 continue;
 518
 519                         uint8_t buf[256];
 520                         char *domain = blobmsg_get_string(cur);
 521                         size_t domainlen = strlen(domain);
 522                         if (domainlen > 0 && domain[domainlen - 1] == '.')
 523                                 domain[domainlen - 1] = 0;
 524
 525                         int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
 526                         if (len <= 0)
 527                                 goto err;
 528
 529                         iface->search = realloc(iface->search, iface->search_len + len);
 530                         if (!iface->search)
 531                                 goto err;
 532
 533                         memcpy(&iface->search[iface->search_len], buf, len);
 534                         iface->search_len += len;
 535                 }
 536         }
 537
 538         if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
 539                 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
 540                 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
 541         }
 542
 543         if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
 544                 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
 545                 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
 546                 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
 547         }
 548
 549         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
 550                 iface->default_router = blobmsg_get_u32(c);
 551
 552         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
 553                 iface->managed = blobmsg_get_u32(c);
 554
 555         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
 556                 iface->ra_not_onlink = blobmsg_get_bool(c);
 557
 558         if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
 559                 iface->ra_advrouter = blobmsg_get_bool(c);
 560
 561         if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
 562                 iface->ra_maxinterval = blobmsg_get_u32(c);
 563
 564         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
 565                 const char *prio = blobmsg_get_string(c);
 566
 567                 if (!strcmp(prio, "high"))
 568                         iface->route_preference = 1;
 569                 else if (!strcmp(prio, "low"))
 570                         iface->route_preference = -1;
 571                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
 572                         iface->route_preference = 0;
 573                 else
 574                         goto err;
 575         }
 576
 577         if ((c = tb[IFACE_ATTR_PD_MANAGER]))
 578                 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
 579                                 sizeof(iface->dhcpv6_pd_manager) - 1);
 580
 581         if ((c = tb[IFACE_ATTR_PD_CER]) &&
 582                         inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
 583                 goto err;
 584
 585         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
 586                 iface->learn_routes = blobmsg_get_bool(c);
 587
 588         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
 589                 iface->external = blobmsg_get_bool(c);
 590
 591         return 0;
 592
 593 err:
 594         close_interface(iface);
 595         return -1;
 596 }
 597
 598 static int set_interface(struct uci_section *s)
 599 {
 600         blob_buf_init(&b, 0);
 601         uci_to_blob(&b, s, &interface_attr_list);
 602
 603         return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
 604 }
 605
 606 void odhcpd_reload(void)
 607 {
 608         struct uci_context *uci = uci_alloc_context();
 609
 610         while (!list_empty(&leases)) {
 611                 struct lease *l = list_first_entry(&leases, struct lease, head);
 612                 list_del(&l->head);
 613                 free(l->duid);
 614                 free(l);
 615         }
 616
 617         struct interface *master = NULL, *i, *n;
 618
 619         if (!uci)
 620                 return;
 621
 622         list_for_each_entry(i, &interfaces, head)
 623                 clean_interface(i);
 624
 625         struct uci_package *dhcp = NULL;
 626         if (!uci_load(uci, "dhcp", &dhcp)) {
 627                 struct uci_element *e;
 628                 uci_foreach_element(&dhcp->sections, e) {
 629                         struct uci_section *s = uci_to_section(e);
 630                         if (!strcmp(s->type, "host"))
 631                                 set_lease(s);
 632                         else if (!strcmp(s->type, "odhcpd"))
 633                                 set_config(s);
 634                 }
 635
 636                 uci_foreach_element(&dhcp->sections, e) {
 637                         struct uci_section *s = uci_to_section(e);
 638                         if (!strcmp(s->type, "dhcp"))
 639                                 set_interface(s);
 640                 }
 641         }
 642
 643         if (config.dhcp_statefile) {
 644                 char *path = strdup(config.dhcp_statefile);
 645
 646                 mkdir_p(dirname(path), 0755);
 647                 free(path);
 648         }
 649
 650 #ifdef WITH_UBUS
 651         ubus_apply_network();
 652 #endif
 653
 654         bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
 655
 656         /* Test for */
 657         list_for_each_entry(i, &interfaces, head) {
 658                 if (i->master)
 659                         continue;
 660
 661                 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
 662                         any_dhcpv6_slave = true;
 663
 664                 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
 665                         any_ra_slave = true;
 666
 667                 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
 668                         any_ndp_slave = true;
 669         }
 670
 671         /* Evaluate hybrid mode for master */
 672         list_for_each_entry(i, &interfaces, head) {
 673                 if (!i->master)
 674                         continue;
 675
 676                 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
 677 #ifdef WITH_UBUS
 678                 if (!ubus_has_prefix(i->name, i->ifname))
 679                         hybrid_mode = RELAYD_RELAY;
 680 #endif
 681
 682                 if (i->dhcpv6 == RELAYD_HYBRID)
 683                         i->dhcpv6 = hybrid_mode;
 684
 685                 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
 686                         i->dhcpv6 = RELAYD_DISABLED;
 687
 688                 if (i->ra == RELAYD_HYBRID)
 689                         i->ra = hybrid_mode;
 690
 691                 if (i->ra == RELAYD_RELAY && !any_ra_slave)
 692                         i->ra = RELAYD_DISABLED;
 693
 694                 if (i->ndp == RELAYD_HYBRID)
 695                         i->ndp = hybrid_mode;
 696
 697                 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
 698                         i->ndp = RELAYD_DISABLED;
 699
 700                 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
 701                         master = i;
 702         }
 703
 704
 705         list_for_each_entry_safe(i, n, &interfaces, head) {
 706                 if (i->inuse) {
 707                         /* Resolve hybrid mode */
 708                         if (i->dhcpv6 == RELAYD_HYBRID)
 709                                 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
 710                                                 RELAYD_RELAY : RELAYD_SERVER;
 711
 712                         if (i->ra == RELAYD_HYBRID)
 713                                 i->ra = (master && master->ra == RELAYD_RELAY) ?
 714                                                 RELAYD_RELAY : RELAYD_SERVER;
 715
 716                         if (i->ndp == RELAYD_HYBRID)
 717                                 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
 718                                                 RELAYD_RELAY : RELAYD_DISABLED;
 719
 720                         setup_router_interface(i, true);
 721                         setup_dhcpv6_interface(i, true);
 722                         setup_ndp_interface(i, true);
 723                         setup_dhcpv4_interface(i, true);
 724                 } else {
 725                         close_interface(i);
 726                 }
 727         }
 728
 729         uci_unload(uci, dhcp);
 730         uci_free_context(uci);
 731 }
 732
 733 static void handle_signal(int signal)
 734 {
 735         char b[1] = {0};
 736
 737         if (signal == SIGHUP) {
 738                 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
 739         } else
 740                 uloop_end();
 741 }
 742
 743 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
 744 {
 745         char b[512];
 746         if (read(u->fd, b, sizeof(b)) < 0) {}
 747
 748         odhcpd_reload();
 749 }
 750
 751 static struct uloop_fd reload_fd = { .cb = reload_cb };
 752
 753 void odhcpd_run(void)
 754 {
 755         if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
 756
 757         reload_fd.fd = reload_pipe[0];
 758         uloop_fd_add(&reload_fd, ULOOP_READ);
 759
 760         signal(SIGTERM, handle_signal);
 761         signal(SIGINT, handle_signal);
 762         signal(SIGHUP, handle_signal);
 763
 764 #ifdef WITH_UBUS
 765         while (init_ubus())
 766                 sleep(1);
 767 #endif
 768
 769         odhcpd_reload();
 770         uloop_run();
 771
 772         while (!list_empty(&interfaces))
 773                 close_interface(list_first_entry(&interfaces, struct interface, head));
 774 }
 775