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