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