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};
22 IFACE_ATTR_DYNAMICDHCP,
35 IFACE_ATTR_ULA_COMPAT,
36 IFACE_ATTR_RA_DEFAULT,
37 IFACE_ATTR_RA_MANAGEMENT,
38 IFACE_ATTR_RA_OFFLINK,
39 IFACE_ATTR_RA_PREFERENCE,
40 IFACE_ATTR_NDPROXY_ROUTING,
41 IFACE_ATTR_NDPROXY_SLAVE,
42 IFACE_ATTR_NDPROXY_STATIC,
46 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
47 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
48 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
49 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
50 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
51 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
52 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
53 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
54 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
55 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
56 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
57 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
58 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
59 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
60 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
61 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
62 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
63 [IFACE_ATTR_ULA_COMPAT] = { .name = "ula_compat", .type = BLOBMSG_TYPE_BOOL },
64 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
65 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
66 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
67 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
68 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
69 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
70 [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
73 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
74 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
75 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
76 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
77 [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
80 const struct uci_blob_param_list interface_attr_list = {
81 .n_params = IFACE_ATTR_MAX,
82 .params = iface_attrs,
83 .info = iface_attr_info,
97 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
98 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
99 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
100 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
101 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
102 [LEASE_ATTR_HOSTNAME] = { .name = "hostname", .type = BLOBMSG_TYPE_STRING },
106 const struct uci_blob_param_list lease_attr_list = {
107 .n_params = LEASE_ATTR_MAX,
108 .params = lease_attrs,
114 ODHCPD_ATTR_LEASEFILE,
115 ODHCPD_ATTR_LEASETRIGGER,
120 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
121 [ODHCPD_ATTR_LEGACY] = { .name = "legacy", .type = BLOBMSG_TYPE_BOOL },
122 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
123 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
127 const struct uci_blob_param_list odhcpd_attr_list = {
128 .n_params = ODHCPD_ATTR_MAX,
129 .params = odhcpd_attrs,
133 static struct interface* get_interface(const char *name)
136 list_for_each_entry(c, &interfaces, head)
137 if (!strcmp(c->name, name))
143 static void clean_interface(struct interface *iface)
147 free(iface->upstream);
148 free(iface->static_ndp);
149 free(iface->dhcpv4_dns);
150 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
154 static void close_interface(struct interface *iface)
156 if (iface->head.next)
157 list_del(&iface->head);
159 setup_router_interface(iface, false);
160 setup_dhcpv6_interface(iface, false);
161 setup_ndp_interface(iface, false);
162 setup_dhcpv4_interface(iface, false);
164 clean_interface(iface);
169 static int parse_mode(const char *mode)
171 if (!strcmp(mode, "disabled")) {
172 return RELAYD_DISABLED;
173 } else if (!strcmp(mode, "server")) {
174 return RELAYD_SERVER;
175 } else if (!strcmp(mode, "relay")) {
177 } else if (!strcmp(mode, "hybrid")) {
178 return RELAYD_HYBRID;
185 static void set_config(struct uci_section *s)
187 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
189 blob_buf_init(&b, 0);
190 uci_to_blob(&b, s, &odhcpd_attr_list);
191 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
193 if ((c = tb[ODHCPD_ATTR_LEGACY]))
194 config.legacy = blobmsg_get_bool(c);
196 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
197 free(config.dhcp_statefile);
198 config.dhcp_statefile = strdup(blobmsg_get_string(c));
201 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
202 free(config.dhcp_cb);
203 config.dhcp_cb = strdup(blobmsg_get_string(c));
208 static int set_lease(struct uci_section *s)
210 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
212 blob_buf_init(&b, 0);
213 uci_to_blob(&b, s, &lease_attr_list);
214 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
217 if ((c = tb[LEASE_ATTR_HOSTNAME]))
218 hostlen = blobmsg_data_len(c);
220 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
225 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
227 if ((c = tb[LEASE_ATTR_IP]))
228 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
231 if ((c = tb[LEASE_ATTR_MAC]))
232 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
235 if ((c = tb[LEASE_ATTR_DUID])) {
236 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
237 lease->duid = malloc(duidlen);
241 ssize_t len = odhcpd_unhexlify(lease->duid,
242 duidlen, blobmsg_get_string(c));
247 lease->duid_len = len;
250 if ((c = tb[LEASE_ATTR_HOSTID]))
251 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
252 blobmsg_get_string(c)) < 0)
255 list_add(&lease->head, &leases);
267 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
269 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
270 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
272 if (tb[IFACE_ATTR_INTERFACE])
273 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
278 struct interface *iface = get_interface(name);
280 iface = calloc(1, sizeof(*iface));
284 strncpy(iface->name, name, sizeof(iface->name) - 1);
285 list_add(&iface->head, &interfaces);
288 const char *ifname = NULL;
290 if (overwrite || !iface->ifname[0])
291 ifname = ubus_get_ifname(name);
295 if ((c = tb[IFACE_ATTR_IFNAME]))
296 ifname = blobmsg_get_string(c);
297 else if ((c = tb[IFACE_ATTR_NETWORKID]))
298 ifname = blobmsg_get_string(c);
301 if (!iface->ifname[0] && !ifname)
305 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
309 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
310 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
312 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
313 iface->ignore = blobmsg_get_bool(c);
315 if ((c = tb[IFACE_ATTR_LEASETIME])) {
316 char *val = blobmsg_get_string(c), *endptr;
317 double time = strtod(val, &endptr);
318 if (time && endptr[0]) {
319 if (endptr[0] == 's')
321 else if (endptr[0] == 'm')
323 else if (endptr[0] == 'h')
325 else if (endptr[0] == 'd')
327 else if (endptr[0] == 'w')
328 time *= 7 * 24 * 3600;
334 iface->dhcpv4_leasetime = time;
337 if ((c = tb[IFACE_ATTR_START])) {
338 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
341 iface->dhcpv4 = RELAYD_SERVER;
344 if ((c = tb[IFACE_ATTR_LIMIT]))
345 iface->dhcpv4_end.s_addr = htonl(
346 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
348 if ((c = tb[IFACE_ATTR_MASTER]))
349 iface->master = blobmsg_get_bool(c);
351 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
352 struct blob_attr *cur;
355 blobmsg_for_each_attr(cur, c, rem) {
356 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
359 iface->upstream = realloc(iface->upstream,
360 iface->upstream_len + blobmsg_data_len(cur));
361 if (!iface->upstream)
364 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
365 iface->upstream_len += blobmsg_data_len(cur);
370 if ((c = tb[IFACE_ATTR_RA])) {
371 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
377 if ((c = tb[IFACE_ATTR_DHCPV4])) {
378 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
379 iface->dhcpv4 = mode;
384 if ((c = tb[IFACE_ATTR_DHCPV6])) {
385 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
386 iface->dhcpv6 = mode;
391 if ((c = tb[IFACE_ATTR_NDP])) {
392 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
398 if ((c = tb[IFACE_ATTR_DNS])) {
399 struct blob_attr *cur;
402 iface->always_rewrite_dns = true;
403 blobmsg_for_each_attr(cur, c, rem) {
404 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
407 struct in_addr addr4;
408 struct in6_addr addr6;
409 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
410 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
411 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
412 if (!iface->dhcpv4_dns)
415 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
416 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
417 iface->dns = realloc(iface->dns,
418 (++iface->dns_cnt) * sizeof(*iface->dns));
422 iface->dns[iface->dns_cnt - 1] = addr6;
429 if ((c = tb[IFACE_ATTR_DOMAIN])) {
430 struct blob_attr *cur;
433 blobmsg_for_each_attr(cur, c, rem) {
434 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
438 int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
442 iface->search = realloc(iface->search, iface->search_len + len);
446 memcpy(&iface->search[iface->search_len], buf, len);
447 iface->search_len += len;
451 if ((c = tb[IFACE_ATTR_ULA_COMPAT]))
452 iface->deprecate_ula_if_public_avail = blobmsg_get_bool(c);
454 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
455 iface->default_router = blobmsg_get_u32(c);
457 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
458 iface->managed = blobmsg_get_u32(c);
460 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
461 iface->ra_not_onlink = blobmsg_get_bool(c);
463 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
464 const char *prio = blobmsg_get_string(c);
466 if (!strcmp(prio, "high"))
467 iface->route_preference = 1;
468 else if (!strcmp(prio, "low"))
469 iface->route_preference = -1;
470 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
471 iface->route_preference = 0;
476 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
477 iface->learn_routes = blobmsg_get_bool(c);
479 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
480 iface->external = blobmsg_get_bool(c);
482 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
483 struct blob_attr *cur;
486 blobmsg_for_each_attr(cur, c, rem) {
487 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
490 int len = blobmsg_data_len(cur);
491 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
492 if (!iface->static_ndp)
495 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
496 iface->static_ndp_len += len;
500 iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) <= 0;
504 close_interface(iface);
508 static int set_interface(struct uci_section *s)
510 blob_buf_init(&b, 0);
511 uci_to_blob(&b, s, &interface_attr_list);
512 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
516 void odhcpd_reload(void)
518 struct uci_context *uci = uci_alloc_context();
520 list_for_each_entry(l, &leases, head) {
526 struct interface *master = NULL, *i, *n;
531 list_for_each_entry(i, &interfaces, head)
534 struct uci_package *dhcp = NULL;
535 if (!uci_load(uci, "dhcp", &dhcp)) {
536 struct uci_element *e;
537 uci_foreach_element(&dhcp->sections, e) {
538 struct uci_section *s = uci_to_section(e);
539 if (!strcmp(s->type, "lease"))
541 else if (!strcmp(s->type, "odhcpd"))
545 uci_foreach_element(&dhcp->sections, e) {
546 struct uci_section *s = uci_to_section(e);
547 if (!strcmp(s->type, "dhcp"))
554 ubus_apply_network();
557 // Evaluate hybrid mode for master
558 list_for_each_entry(i, &interfaces, head) {
562 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
564 if (ubus_has_prefix(i->name, i->ifname))
565 hybrid_mode = RELAYD_RELAY;
568 if (i->dhcpv6 == RELAYD_HYBRID)
569 i->dhcpv6 = hybrid_mode;
571 if (i->ra == RELAYD_HYBRID)
574 if (i->ndp == RELAYD_HYBRID)
575 i->ndp = hybrid_mode;
577 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
582 list_for_each_entry_safe(i, n, &interfaces, head) {
584 // Resolve hybrid mode
585 if (i->dhcpv6 == RELAYD_HYBRID)
586 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
587 RELAYD_RELAY : RELAYD_SERVER;
589 if (i->ra == RELAYD_HYBRID)
590 i->ra = (master && master->ra == RELAYD_RELAY) ?
591 RELAYD_RELAY : RELAYD_SERVER;
593 if (i->ndp == RELAYD_HYBRID)
594 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
595 RELAYD_RELAY : RELAYD_SERVER;
597 setup_router_interface(i, true);
598 setup_dhcpv6_interface(i, true);
599 setup_ndp_interface(i, true);
600 setup_dhcpv4_interface(i, true);
606 uci_unload(uci, dhcp);
607 uci_free_context(uci);
611 static void handle_signal(int signal)
614 if (signal == SIGHUP)
615 write(reload_pipe[1], b, sizeof(b));
622 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
625 read(u->fd, b, sizeof(b));
629 static struct uloop_fd reload_fd = { .cb = reload_cb };
631 void odhcpd_run(void)
633 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
634 reload_fd.fd = reload_pipe[0];
635 uloop_fd_add(&reload_fd, ULOOP_READ);
637 signal(SIGTERM, handle_signal);
638 signal(SIGINT, handle_signal);
639 signal(SIGHUP, handle_signal);