10 static struct blob_buf b;
11 struct list_head leases = LIST_HEAD_INIT(leases);
12 struct list_head interfaces = LIST_HEAD_INIT(interfaces);
13 struct config config = {false, NULL, NULL};
19 IFACE_ATTR_DYNAMICDHCP,
32 IFACE_ATTR_ULA_COMPAT,
33 IFACE_ATTR_RA_DEFAULT,
34 IFACE_ATTR_RA_MANAGEMENT,
35 IFACE_ATTR_RA_OFFLINK,
36 IFACE_ATTR_RA_PREFERENCE,
37 IFACE_ATTR_NDPROXY_ROUTING,
38 IFACE_ATTR_NDPROXY_SLAVE,
39 IFACE_ATTR_NDPROXY_STATIC,
43 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
44 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
45 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
46 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
47 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
48 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
49 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
50 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
51 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
52 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
53 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
54 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
55 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
56 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
57 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
58 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
59 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
60 [IFACE_ATTR_ULA_COMPAT] = { .name = "ula_compat", .type = BLOBMSG_TYPE_BOOL },
61 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
62 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
63 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
64 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
65 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
66 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
67 [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
70 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
71 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
72 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
73 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
74 [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
77 const struct uci_blob_param_list interface_attr_list = {
78 .n_params = IFACE_ATTR_MAX,
79 .params = iface_attrs,
80 .info = iface_attr_info,
94 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
95 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
96 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
97 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
98 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
99 [LEASE_ATTR_HOSTNAME] = { .name = "hostname", .type = BLOBMSG_TYPE_STRING },
103 const struct uci_blob_param_list lease_attr_list = {
104 .n_params = LEASE_ATTR_MAX,
105 .params = lease_attrs,
111 ODHCPD_ATTR_LEASEFILE,
112 ODHCPD_ATTR_LEASETRIGGER,
117 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
118 [ODHCPD_ATTR_LEGACY] = { .name = "legacy", .type = BLOBMSG_TYPE_BOOL },
119 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
120 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
124 const struct uci_blob_param_list odhcpd_attr_list = {
125 .n_params = ODHCPD_ATTR_MAX,
126 .params = odhcpd_attrs,
130 static struct interface* get_interface(const char *name)
133 list_for_each_entry(c, &interfaces, head)
134 if (!strcmp(c->name, name))
140 static void clean_interface(struct interface *iface)
144 free(iface->upstream);
145 free(iface->static_ndp);
146 free(iface->dhcpv4_dns);
147 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
151 static void close_interface(struct interface *iface)
153 if (iface->head.next)
154 list_del(&iface->head);
156 setup_router_interface(iface, false);
157 setup_dhcpv6_interface(iface, false);
158 setup_ndp_interface(iface, false);
159 setup_dhcpv4_interface(iface, false);
161 clean_interface(iface);
166 static int parse_mode(const char *mode)
168 if (!strcmp(mode, "disabled")) {
169 return RELAYD_DISABLED;
170 } else if (!strcmp(mode, "server")) {
171 return RELAYD_SERVER;
172 } else if (!strcmp(mode, "relay")) {
174 } else if (!strcmp(mode, "hybrid")) {
175 return RELAYD_HYBRID;
182 static void set_config(struct uci_section *s)
184 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
186 blob_buf_init(&b, 0);
187 uci_to_blob(&b, s, &lease_attr_list);
188 blobmsg_parse(lease_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
190 if ((c = tb[ODHCPD_ATTR_LEGACY]))
191 config.legacy = blobmsg_get_bool(c);
193 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
194 free(config.dhcp_statefile);
195 config.dhcp_statefile = strdup(blobmsg_get_string(c));
198 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
199 free(config.dhcp_cb);
200 config.dhcp_cb = strdup(blobmsg_get_string(c));
205 static int set_lease(struct uci_section *s)
207 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
209 blob_buf_init(&b, 0);
210 uci_to_blob(&b, s, &lease_attr_list);
211 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
214 if ((c = tb[LEASE_ATTR_HOSTNAME]))
215 hostlen = blobmsg_data_len(c);
217 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
220 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
222 if ((c = tb[LEASE_ATTR_IP]))
223 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
226 if ((c = tb[LEASE_ATTR_MAC]))
227 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
230 if ((c = tb[LEASE_ATTR_DUID])) {
231 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
232 lease->duid = malloc(duidlen);
233 ssize_t len = odhcpd_unhexlify(lease->duid,
234 duidlen, blobmsg_get_string(c));
239 lease->duid_len = len;
242 if ((c = tb[LEASE_ATTR_HOSTID]))
243 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
244 blobmsg_get_string(c)) < 0)
247 list_add(&lease->head, &leases);
257 int config_parse_interface(struct blob_attr *b, const char *name, bool overwrite)
259 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
260 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, blob_data(b), blob_len(b));
262 if (tb[IFACE_ATTR_INTERFACE])
263 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
268 struct interface *iface = get_interface(name);
270 iface = calloc(1, sizeof(*iface));
271 strncpy(iface->name, name, sizeof(iface->name) - 1);
272 list_add(&iface->head, &interfaces);
274 clean_interface(iface);
277 const char *ifname = NULL;
280 ifname = ubus_get_ifname(name);
282 if ((c = tb[IFACE_ATTR_IFNAME]))
283 ifname = blobmsg_get_string(c);
284 else if ((c = tb[IFACE_ATTR_NETWORKID]))
285 ifname = blobmsg_get_string(c);
290 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
294 clean_interface(iface);
296 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
297 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
299 if ((c = tb[IFACE_ATTR_IGNORE]))
300 iface->ignore = blobmsg_get_bool(c);
302 if ((c = tb[IFACE_ATTR_LEASETIME])) {
303 char *val = blobmsg_get_string(c), *endptr;
304 double time = strtod(val, &endptr);
305 if (time && endptr[0]) {
306 if (endptr[0] == 's')
308 else if (endptr[0] == 'm')
310 else if (endptr[0] == 'h')
312 else if (endptr[0] == 'd')
314 else if (endptr[0] == 'w')
315 time *= 7 * 24 * 3600;
321 iface->dhcpv4_leasetime = time;
324 if ((c = tb[IFACE_ATTR_START])) {
325 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
328 iface->dhcpv4 = RELAYD_SERVER;
331 if ((c = tb[IFACE_ATTR_LIMIT]))
332 iface->dhcpv4_end.s_addr = htonl(
333 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
335 if ((c = tb[IFACE_ATTR_MASTER]))
336 iface->master = blobmsg_get_bool(c);
338 if ((c = tb[IFACE_ATTR_UPSTREAM])) {
339 struct blob_attr *cur;
342 blobmsg_for_each_attr(cur, c, rem) {
343 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
346 iface->upstream = realloc(iface->upstream,
347 iface->upstream_len + blobmsg_data_len(cur));
348 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
349 iface->upstream_len += blobmsg_data_len(cur);
354 if ((c = tb[IFACE_ATTR_RA])) {
355 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
361 if ((c = tb[IFACE_ATTR_DHCPV4])) {
362 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
363 iface->dhcpv4 = mode;
368 if ((c = tb[IFACE_ATTR_DHCPV6])) {
369 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
370 iface->dhcpv6 = mode;
375 if ((c = tb[IFACE_ATTR_NDP])) {
376 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
382 if ((c = tb[IFACE_ATTR_DNS])) {
383 struct blob_attr *cur;
386 iface->always_rewrite_dns = true;
387 blobmsg_for_each_attr(cur, c, rem) {
388 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
391 struct in_addr addr4;
392 struct in6_addr addr6;
393 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
394 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
395 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
396 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
397 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
398 iface->dns = realloc(iface->dns,
399 (++iface->dns_cnt) * sizeof(*iface->dns));
400 iface->dns[iface->dns_cnt - 1] = addr6;
407 if ((c = tb[IFACE_ATTR_DOMAIN])) {
408 struct blob_attr *cur;
411 blobmsg_for_each_attr(cur, c, rem) {
412 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
416 int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
420 iface->search = realloc(iface->search, iface->search_len + len);
421 memcpy(&iface->search[iface->search_len], buf, len);
422 iface->search_len += len;
426 if ((c = tb[IFACE_ATTR_ULA_COMPAT]))
427 iface->deprecate_ula_if_public_avail = blobmsg_get_bool(c);
429 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
430 iface->default_router = blobmsg_get_u32(c);
432 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
433 iface->managed = blobmsg_get_u32(c);
435 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
436 iface->ra_not_onlink = blobmsg_get_bool(c);
438 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
439 const char *prio = blobmsg_get_string(c);
441 if (!strcmp(prio, "high"))
442 iface->route_preference = 1;
443 else if (!strcmp(prio, "low"))
444 iface->route_preference = -1;
445 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
446 iface->route_preference = 0;
451 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
452 iface->learn_routes = blobmsg_get_bool(c);
454 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
455 iface->external = blobmsg_get_bool(c);
457 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
458 struct blob_attr *cur;
461 blobmsg_for_each_attr(cur, c, rem) {
462 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
465 int len = blobmsg_data_len(cur);
466 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
467 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
468 iface->static_ndp_len += len;
472 iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) < 0;
476 close_interface(iface);
480 static int set_interface(struct uci_section *s)
482 blob_buf_init(&b, 0);
483 uci_to_blob(&b, s, &interface_attr_list);
484 return config_parse_interface(b.head, s->e.name, true);
488 static volatile int do_reload = false;
489 static void set_stop(int signal)
492 do_reload = (signal == SIGHUP);
495 void odhcpd_run(void)
497 struct uci_context *uci = uci_alloc_context();
498 signal(SIGTERM, set_stop);
499 signal(SIGHUP, set_stop);
500 signal(SIGINT, set_stop);
503 do_reload = uloop_cancelled = false;
506 list_for_each_entry(l, &leases, head) {
512 struct uci_package *dhcp = NULL;
513 if (!uci_load(uci, "dhcp", &dhcp)) {
514 struct uci_element *e;
515 uci_foreach_element(&dhcp->sections, e) {
516 struct uci_section *s = uci_to_section(e);
517 if (!strcmp(s->type, "lease"))
519 else if (!strcmp(s->type, "odhcpd"))
523 uci_foreach_element(&dhcp->sections, e) {
524 struct uci_section *s = uci_to_section(e);
525 if (!strcmp(s->type, "dhcp"))
531 ubus_apply_network();
534 // Evaluate hybrid mode for master
535 struct interface *master = NULL, *i;
536 list_for_each_entry(i, &interfaces, head) {
540 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
542 if (ubus_has_prefix(i->name, i->ifname))
543 hybrid_mode = RELAYD_RELAY;
546 if (i->dhcpv6 == RELAYD_HYBRID)
547 i->dhcpv6 = hybrid_mode;
549 if (i->ra == RELAYD_HYBRID)
552 if (i->ndp == RELAYD_HYBRID)
553 i->ndp = hybrid_mode;
555 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
560 list_for_each_entry(i, &interfaces, head) {
561 if (i->inuse && !i->ignore) {
562 // Resolve hybrid mode
563 if (i->dhcpv6 == RELAYD_HYBRID)
564 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
565 RELAYD_RELAY : RELAYD_SERVER;
567 if (i->ra == RELAYD_HYBRID)
568 i->ra = (master && master->ra == RELAYD_RELAY) ?
569 RELAYD_RELAY : RELAYD_SERVER;
571 if (i->ndp == RELAYD_HYBRID)
572 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
573 RELAYD_RELAY : RELAYD_SERVER;
575 setup_router_interface(i, true);
576 setup_dhcpv6_interface(i, true);
577 setup_ndp_interface(i, true);
578 setup_dhcpv4_interface(i, true);
587 uci_unload(uci, dhcp);