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