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, &lease_attr_list);
191 blobmsg_parse(lease_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);
223 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
225 if ((c = tb[LEASE_ATTR_IP]))
226 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
229 if ((c = tb[LEASE_ATTR_MAC]))
230 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
233 if ((c = tb[LEASE_ATTR_DUID])) {
234 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
235 lease->duid = malloc(duidlen);
236 ssize_t len = odhcpd_unhexlify(lease->duid,
237 duidlen, blobmsg_get_string(c));
242 lease->duid_len = len;
245 if ((c = tb[LEASE_ATTR_HOSTID]))
246 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
247 blobmsg_get_string(c)) < 0)
250 list_add(&lease->head, &leases);
260 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
262 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
263 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
265 if (tb[IFACE_ATTR_INTERFACE])
266 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
271 struct interface *iface = get_interface(name);
273 iface = calloc(1, sizeof(*iface));
274 strncpy(iface->name, name, sizeof(iface->name) - 1);
275 list_add(&iface->head, &interfaces);
276 } else if (overwrite) {
277 clean_interface(iface);
280 const char *ifname = NULL;
282 if (overwrite || !iface->ifname[0])
283 ifname = ubus_get_ifname(name);
287 if ((c = tb[IFACE_ATTR_IFNAME]))
288 ifname = blobmsg_get_string(c);
289 else if ((c = tb[IFACE_ATTR_NETWORKID]))
290 ifname = blobmsg_get_string(c);
293 if (!iface->ifname[0] && !ifname)
297 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
302 clean_interface(iface);
304 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
305 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
307 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
308 iface->ignore = blobmsg_get_bool(c);
310 if ((c = tb[IFACE_ATTR_LEASETIME])) {
311 char *val = blobmsg_get_string(c), *endptr;
312 double time = strtod(val, &endptr);
313 if (time && endptr[0]) {
314 if (endptr[0] == 's')
316 else if (endptr[0] == 'm')
318 else if (endptr[0] == 'h')
320 else if (endptr[0] == 'd')
322 else if (endptr[0] == 'w')
323 time *= 7 * 24 * 3600;
329 iface->dhcpv4_leasetime = time;
332 if ((c = tb[IFACE_ATTR_START])) {
333 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
336 iface->dhcpv4 = RELAYD_SERVER;
339 if ((c = tb[IFACE_ATTR_LIMIT]))
340 iface->dhcpv4_end.s_addr = htonl(
341 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
343 if ((c = tb[IFACE_ATTR_MASTER]))
344 iface->master = blobmsg_get_bool(c);
346 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
347 struct blob_attr *cur;
350 blobmsg_for_each_attr(cur, c, rem) {
351 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
354 iface->upstream = realloc(iface->upstream,
355 iface->upstream_len + blobmsg_data_len(cur));
356 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
357 iface->upstream_len += blobmsg_data_len(cur);
362 if ((c = tb[IFACE_ATTR_RA])) {
363 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
369 if ((c = tb[IFACE_ATTR_DHCPV4])) {
370 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
371 iface->dhcpv4 = mode;
376 if ((c = tb[IFACE_ATTR_DHCPV6])) {
377 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
378 iface->dhcpv6 = mode;
383 if ((c = tb[IFACE_ATTR_NDP])) {
384 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
390 if ((c = tb[IFACE_ATTR_DNS])) {
391 struct blob_attr *cur;
394 iface->always_rewrite_dns = true;
395 blobmsg_for_each_attr(cur, c, rem) {
396 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
399 struct in_addr addr4;
400 struct in6_addr addr6;
401 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
402 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
403 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
404 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
405 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
406 iface->dns = realloc(iface->dns,
407 (++iface->dns_cnt) * sizeof(*iface->dns));
408 iface->dns[iface->dns_cnt - 1] = addr6;
415 if ((c = tb[IFACE_ATTR_DOMAIN])) {
416 struct blob_attr *cur;
419 blobmsg_for_each_attr(cur, c, rem) {
420 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
424 int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
428 iface->search = realloc(iface->search, iface->search_len + len);
429 memcpy(&iface->search[iface->search_len], buf, len);
430 iface->search_len += len;
434 if ((c = tb[IFACE_ATTR_ULA_COMPAT]))
435 iface->deprecate_ula_if_public_avail = blobmsg_get_bool(c);
437 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
438 iface->default_router = blobmsg_get_u32(c);
440 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
441 iface->managed = blobmsg_get_u32(c);
443 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
444 iface->ra_not_onlink = blobmsg_get_bool(c);
446 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
447 const char *prio = blobmsg_get_string(c);
449 if (!strcmp(prio, "high"))
450 iface->route_preference = 1;
451 else if (!strcmp(prio, "low"))
452 iface->route_preference = -1;
453 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
454 iface->route_preference = 0;
459 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
460 iface->learn_routes = blobmsg_get_bool(c);
462 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
463 iface->external = blobmsg_get_bool(c);
465 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
466 struct blob_attr *cur;
469 blobmsg_for_each_attr(cur, c, rem) {
470 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
473 int len = blobmsg_data_len(cur);
474 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
475 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
476 iface->static_ndp_len += len;
480 iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) < 0;
484 close_interface(iface);
488 static int set_interface(struct uci_section *s)
490 blob_buf_init(&b, 0);
491 uci_to_blob(&b, s, &interface_attr_list);
492 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
496 void odhcpd_reload(void)
498 struct uci_context *uci = uci_alloc_context();
500 list_for_each_entry(l, &leases, head) {
506 struct uci_package *dhcp = NULL;
507 if (!uci_load(uci, "dhcp", &dhcp)) {
508 struct uci_element *e;
509 uci_foreach_element(&dhcp->sections, e) {
510 struct uci_section *s = uci_to_section(e);
511 if (!strcmp(s->type, "lease"))
513 else if (!strcmp(s->type, "odhcpd"))
517 uci_foreach_element(&dhcp->sections, e) {
518 struct uci_section *s = uci_to_section(e);
519 if (!strcmp(s->type, "dhcp"))
525 ubus_apply_network();
528 // Evaluate hybrid mode for master
529 struct interface *master = NULL, *i, *n;
530 list_for_each_entry(i, &interfaces, head) {
534 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
536 if (ubus_has_prefix(i->name, i->ifname))
537 hybrid_mode = RELAYD_RELAY;
540 if (i->dhcpv6 == RELAYD_HYBRID)
541 i->dhcpv6 = hybrid_mode;
543 if (i->ra == RELAYD_HYBRID)
546 if (i->ndp == RELAYD_HYBRID)
547 i->ndp = hybrid_mode;
549 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
554 list_for_each_entry_safe(i, n, &interfaces, head) {
556 // Resolve hybrid mode
557 if (i->dhcpv6 == RELAYD_HYBRID)
558 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
559 RELAYD_RELAY : RELAYD_SERVER;
561 if (i->ra == RELAYD_HYBRID)
562 i->ra = (master && master->ra == RELAYD_RELAY) ?
563 RELAYD_RELAY : RELAYD_SERVER;
565 if (i->ndp == RELAYD_HYBRID)
566 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
567 RELAYD_RELAY : RELAYD_SERVER;
569 setup_router_interface(i, true);
570 setup_dhcpv6_interface(i, true);
571 setup_ndp_interface(i, true);
572 setup_dhcpv4_interface(i, true);
579 uci_unload(uci, dhcp);
580 uci_free_context(uci);
584 static void handle_signal(int signal)
587 if (signal == SIGHUP)
588 write(reload_pipe[1], b, sizeof(b));
595 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
598 read(u->fd, b, sizeof(b));
602 static struct uloop_fd reload_fd = { .cb = reload_cb };
604 void odhcpd_run(void)
606 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
607 reload_fd.fd = reload_pipe[0];
608 uloop_fd_add(&reload_fd, ULOOP_READ);
610 signal(SIGTERM, handle_signal);
611 signal(SIGINT, handle_signal);
612 signal(SIGHUP, handle_signal);