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_FILTER_CLASS,
36 IFACE_ATTR_DHCPV6_RAW,
37 IFACE_ATTR_RA_DEFAULT,
38 IFACE_ATTR_RA_MANAGEMENT,
39 IFACE_ATTR_RA_OFFLINK,
40 IFACE_ATTR_RA_PREFERENCE,
41 IFACE_ATTR_PD_MANAGER,
43 IFACE_ATTR_NDPROXY_ROUTING,
44 IFACE_ATTR_NDPROXY_SLAVE,
48 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
49 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
50 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
51 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
52 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
53 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
54 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
55 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
56 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
57 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
58 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
59 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
60 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
61 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
62 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
63 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
64 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
65 [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
66 [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
67 [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
68 [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
69 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
70 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
71 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
72 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
73 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
74 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
77 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
78 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
79 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
80 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
83 const struct uci_blob_param_list interface_attr_list = {
84 .n_params = IFACE_ATTR_MAX,
85 .params = iface_attrs,
86 .info = iface_attr_info,
100 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
101 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
102 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
103 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
104 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
105 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
109 const struct uci_blob_param_list lease_attr_list = {
110 .n_params = LEASE_ATTR_MAX,
111 .params = lease_attrs,
116 ODHCPD_ATTR_MAINDHCP,
117 ODHCPD_ATTR_LEASEFILE,
118 ODHCPD_ATTR_LEASETRIGGER,
123 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
124 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
125 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
126 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
130 const struct uci_blob_param_list odhcpd_attr_list = {
131 .n_params = ODHCPD_ATTR_MAX,
132 .params = odhcpd_attrs,
136 static struct interface* get_interface(const char *name)
139 list_for_each_entry(c, &interfaces, head)
140 if (!strcmp(c->name, name))
146 static void clean_interface(struct interface *iface)
150 free(iface->upstream);
151 free(iface->dhcpv4_dns);
152 free(iface->dhcpv6_raw);
153 free(iface->filter_class);
154 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
158 static void close_interface(struct interface *iface)
160 if (iface->head.next)
161 list_del(&iface->head);
163 setup_router_interface(iface, false);
164 setup_dhcpv6_interface(iface, false);
165 setup_ndp_interface(iface, false);
166 setup_dhcpv4_interface(iface, false);
168 clean_interface(iface);
173 static int parse_mode(const char *mode)
175 if (!strcmp(mode, "disabled")) {
176 return RELAYD_DISABLED;
177 } else if (!strcmp(mode, "server")) {
178 return RELAYD_SERVER;
179 } else if (!strcmp(mode, "relay")) {
181 } else if (!strcmp(mode, "hybrid")) {
182 return RELAYD_HYBRID;
189 static void set_config(struct uci_section *s)
191 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
193 blob_buf_init(&b, 0);
194 uci_to_blob(&b, s, &odhcpd_attr_list);
195 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
197 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
198 config.legacy = blobmsg_get_bool(c);
200 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
201 free(config.dhcp_statefile);
202 config.dhcp_statefile = strdup(blobmsg_get_string(c));
205 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
206 free(config.dhcp_cb);
207 config.dhcp_cb = strdup(blobmsg_get_string(c));
212 static int set_lease(struct uci_section *s)
214 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
216 blob_buf_init(&b, 0);
217 uci_to_blob(&b, s, &lease_attr_list);
218 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
221 if ((c = tb[LEASE_ATTR_NAME]))
222 hostlen = blobmsg_data_len(c);
224 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
229 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
231 if ((c = tb[LEASE_ATTR_IP]))
232 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
235 if ((c = tb[LEASE_ATTR_MAC]))
236 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
239 if ((c = tb[LEASE_ATTR_DUID])) {
240 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
241 lease->duid = malloc(duidlen);
245 ssize_t len = odhcpd_unhexlify(lease->duid,
246 duidlen, blobmsg_get_string(c));
251 lease->duid_len = len;
254 if ((c = tb[LEASE_ATTR_HOSTID])) {
256 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
261 list_add(&lease->head, &leases);
273 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
275 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
276 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
278 if (tb[IFACE_ATTR_INTERFACE])
279 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
284 struct interface *iface = get_interface(name);
286 iface = calloc(1, sizeof(*iface));
290 strncpy(iface->name, name, sizeof(iface->name) - 1);
291 list_add(&iface->head, &interfaces);
295 const char *ifname = NULL;
297 if (overwrite || !iface->ifname[0])
298 ifname = ubus_get_ifname(name);
302 if ((c = tb[IFACE_ATTR_IFNAME]))
303 ifname = blobmsg_get_string(c);
304 else if ((c = tb[IFACE_ATTR_NETWORKID]))
305 ifname = blobmsg_get_string(c);
308 if (!iface->ifname[0] && !ifname)
312 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
314 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
319 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
320 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
322 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
323 iface->ignore = blobmsg_get_bool(c);
325 if ((c = tb[IFACE_ATTR_LEASETIME])) {
326 char *val = blobmsg_get_string(c), *endptr;
327 double time = strtod(val, &endptr);
328 if (time && endptr[0]) {
329 if (endptr[0] == 's')
331 else if (endptr[0] == 'm')
333 else if (endptr[0] == 'h')
335 else if (endptr[0] == 'd')
337 else if (endptr[0] == 'w')
338 time *= 7 * 24 * 3600;
344 iface->dhcpv4_leasetime = time;
347 if ((c = tb[IFACE_ATTR_START])) {
348 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
351 iface->dhcpv4 = RELAYD_SERVER;
354 if ((c = tb[IFACE_ATTR_LIMIT]))
355 iface->dhcpv4_end.s_addr = htonl(
356 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
358 if ((c = tb[IFACE_ATTR_MASTER]))
359 iface->master = blobmsg_get_bool(c);
361 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
362 struct blob_attr *cur;
365 blobmsg_for_each_attr(cur, c, rem) {
366 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
369 iface->upstream = realloc(iface->upstream,
370 iface->upstream_len + blobmsg_data_len(cur));
371 if (!iface->upstream)
374 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
375 iface->upstream_len += blobmsg_data_len(cur);
380 if ((c = tb[IFACE_ATTR_RA])) {
381 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
387 if ((c = tb[IFACE_ATTR_DHCPV4])) {
388 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
389 iface->dhcpv4 = mode;
394 if ((c = tb[IFACE_ATTR_DHCPV6])) {
395 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
396 iface->dhcpv6 = mode;
401 if ((c = tb[IFACE_ATTR_NDP])) {
402 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
408 if ((c = tb[IFACE_ATTR_DNS])) {
409 struct blob_attr *cur;
412 iface->always_rewrite_dns = true;
413 blobmsg_for_each_attr(cur, c, rem) {
414 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
417 struct in_addr addr4;
418 struct in6_addr addr6;
419 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
420 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
421 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
422 if (!iface->dhcpv4_dns)
425 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
426 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
427 iface->dns = realloc(iface->dns,
428 (++iface->dns_cnt) * sizeof(*iface->dns));
432 iface->dns[iface->dns_cnt - 1] = addr6;
439 if ((c = tb[IFACE_ATTR_DOMAIN])) {
440 struct blob_attr *cur;
443 blobmsg_for_each_attr(cur, c, rem) {
444 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
448 char *domain = blobmsg_get_string(cur);
449 size_t domainlen = strlen(domain);
450 if (domainlen > 0 && domain[domainlen - 1] == '.')
451 domain[domainlen - 1] = 0;
453 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
458 iface->search = realloc(iface->search, iface->search_len + len);
462 memcpy(&iface->search[iface->search_len], buf, len);
463 iface->search_len += len;
467 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
468 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
469 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
472 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
473 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
474 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
475 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
478 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
479 iface->default_router = blobmsg_get_u32(c);
481 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
482 iface->managed = blobmsg_get_u32(c);
486 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
487 iface->ra_not_onlink = blobmsg_get_bool(c);
489 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
490 const char *prio = blobmsg_get_string(c);
492 if (!strcmp(prio, "high"))
493 iface->route_preference = 1;
494 else if (!strcmp(prio, "low"))
495 iface->route_preference = -1;
496 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
497 iface->route_preference = 0;
502 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
503 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
504 sizeof(iface->dhcpv6_pd_manager) - 1);
506 if ((c = tb[IFACE_ATTR_PD_CER]) &&
507 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
510 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
511 iface->learn_routes = blobmsg_get_bool(c);
513 iface->learn_routes = true;
515 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
516 iface->external = blobmsg_get_bool(c);
521 close_interface(iface);
525 static int set_interface(struct uci_section *s)
527 blob_buf_init(&b, 0);
528 uci_to_blob(&b, s, &interface_attr_list);
529 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
533 void odhcpd_reload(void)
535 struct uci_context *uci = uci_alloc_context();
536 while (!list_empty(&leases)) {
537 struct lease *l = list_first_entry(&leases, struct lease, head);
543 struct interface *master = NULL, *i, *n;
548 list_for_each_entry(i, &interfaces, head)
551 struct uci_package *dhcp = NULL;
552 if (!uci_load(uci, "dhcp", &dhcp)) {
553 struct uci_element *e;
554 uci_foreach_element(&dhcp->sections, e) {
555 struct uci_section *s = uci_to_section(e);
556 if (!strcmp(s->type, "host"))
558 else if (!strcmp(s->type, "odhcpd"))
562 uci_foreach_element(&dhcp->sections, e) {
563 struct uci_section *s = uci_to_section(e);
564 if (!strcmp(s->type, "dhcp"))
571 ubus_apply_network();
574 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
577 list_for_each_entry(i, &interfaces, head) {
581 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
582 any_dhcpv6_slave = true;
584 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
587 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
588 any_ndp_slave = true;
591 // Evaluate hybrid mode for master
592 list_for_each_entry(i, &interfaces, head) {
596 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
598 if (!ubus_has_prefix(i->name, i->ifname))
599 hybrid_mode = RELAYD_RELAY;
602 if (i->dhcpv6 == RELAYD_HYBRID)
603 i->dhcpv6 = hybrid_mode;
605 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
606 i->dhcpv6 = RELAYD_DISABLED;
608 if (i->ra == RELAYD_HYBRID)
611 if (i->ra == RELAYD_RELAY && !any_ra_slave)
612 i->ra = RELAYD_DISABLED;
614 if (i->ndp == RELAYD_HYBRID)
615 i->ndp = hybrid_mode;
617 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
618 i->ndp = RELAYD_DISABLED;
620 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
625 list_for_each_entry_safe(i, n, &interfaces, head) {
627 // Resolve hybrid mode
628 if (i->dhcpv6 == RELAYD_HYBRID)
629 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
630 RELAYD_RELAY : RELAYD_SERVER;
632 if (i->ra == RELAYD_HYBRID)
633 i->ra = (master && master->ra == RELAYD_RELAY) ?
634 RELAYD_RELAY : RELAYD_SERVER;
636 if (i->ndp == RELAYD_HYBRID)
637 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
638 RELAYD_RELAY : RELAYD_DISABLED;
640 setup_router_interface(i, true);
641 setup_dhcpv6_interface(i, true);
642 setup_ndp_interface(i, true);
643 setup_dhcpv4_interface(i, true);
649 uci_unload(uci, dhcp);
650 uci_free_context(uci);
654 static void handle_signal(int signal)
657 if (signal == SIGHUP)
658 write(reload_pipe[1], b, sizeof(b));
665 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
668 read(u->fd, b, sizeof(b));
672 static struct uloop_fd reload_fd = { .cb = reload_cb };
674 void odhcpd_run(void)
676 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
677 reload_fd.fd = reload_pipe[0];
678 uloop_fd_add(&reload_fd, ULOOP_READ);
680 signal(SIGTERM, handle_signal);
681 signal(SIGINT, handle_signal);
682 signal(SIGHUP, handle_signal);