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_RA_DEFAULT,
36 IFACE_ATTR_RA_MANAGEMENT,
37 IFACE_ATTR_RA_OFFLINK,
38 IFACE_ATTR_RA_PREFERENCE,
39 IFACE_ATTR_PD_MANAGER,
41 IFACE_ATTR_NDPROXY_ROUTING,
42 IFACE_ATTR_NDPROXY_SLAVE,
43 IFACE_ATTR_NDPROXY_STATIC,
47 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
48 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
49 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
50 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
51 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
52 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
53 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
54 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
55 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
56 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
57 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
58 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
59 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
60 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
61 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
62 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
63 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
64 [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
65 [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
66 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
67 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
68 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
69 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
70 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
71 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
72 [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
75 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
76 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
77 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
78 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
79 [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
82 const struct uci_blob_param_list interface_attr_list = {
83 .n_params = IFACE_ATTR_MAX,
84 .params = iface_attrs,
85 .info = iface_attr_info,
99 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
100 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
101 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
102 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
103 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
104 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
108 const struct uci_blob_param_list lease_attr_list = {
109 .n_params = LEASE_ATTR_MAX,
110 .params = lease_attrs,
115 ODHCPD_ATTR_MAINDHCP,
116 ODHCPD_ATTR_LEASEFILE,
117 ODHCPD_ATTR_LEASETRIGGER,
122 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
123 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
124 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
125 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
129 const struct uci_blob_param_list odhcpd_attr_list = {
130 .n_params = ODHCPD_ATTR_MAX,
131 .params = odhcpd_attrs,
135 static struct interface* get_interface(const char *name)
138 list_for_each_entry(c, &interfaces, head)
139 if (!strcmp(c->name, name))
145 static void clean_interface(struct interface *iface)
149 free(iface->upstream);
150 free(iface->static_ndp);
151 free(iface->dhcpv4_dns);
152 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
156 static void close_interface(struct interface *iface)
158 if (iface->head.next)
159 list_del(&iface->head);
161 setup_router_interface(iface, false);
162 setup_dhcpv6_interface(iface, false);
163 setup_ndp_interface(iface, false);
164 setup_dhcpv4_interface(iface, false);
166 clean_interface(iface);
171 static int parse_mode(const char *mode)
173 if (!strcmp(mode, "disabled")) {
174 return RELAYD_DISABLED;
175 } else if (!strcmp(mode, "server")) {
176 return RELAYD_SERVER;
177 } else if (!strcmp(mode, "relay")) {
179 } else if (!strcmp(mode, "hybrid")) {
180 return RELAYD_HYBRID;
187 static void set_config(struct uci_section *s)
189 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
191 blob_buf_init(&b, 0);
192 uci_to_blob(&b, s, &odhcpd_attr_list);
193 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
195 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
196 config.legacy = blobmsg_get_bool(c);
198 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
199 free(config.dhcp_statefile);
200 config.dhcp_statefile = strdup(blobmsg_get_string(c));
203 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
204 free(config.dhcp_cb);
205 config.dhcp_cb = strdup(blobmsg_get_string(c));
210 static int set_lease(struct uci_section *s)
212 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
214 blob_buf_init(&b, 0);
215 uci_to_blob(&b, s, &lease_attr_list);
216 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
219 if ((c = tb[LEASE_ATTR_NAME]))
220 hostlen = blobmsg_data_len(c);
222 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
227 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
229 if ((c = tb[LEASE_ATTR_IP]))
230 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
233 if ((c = tb[LEASE_ATTR_MAC]))
234 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
237 if ((c = tb[LEASE_ATTR_DUID])) {
238 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
239 lease->duid = malloc(duidlen);
243 ssize_t len = odhcpd_unhexlify(lease->duid,
244 duidlen, blobmsg_get_string(c));
249 lease->duid_len = len;
252 if ((c = tb[LEASE_ATTR_HOSTID]))
253 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
254 blobmsg_get_string(c)) < 0)
257 list_add(&lease->head, &leases);
269 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
271 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
272 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
274 if (tb[IFACE_ATTR_INTERFACE])
275 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
280 struct interface *iface = get_interface(name);
282 iface = calloc(1, sizeof(*iface));
286 strncpy(iface->name, name, sizeof(iface->name) - 1);
287 list_add(&iface->head, &interfaces);
291 const char *ifname = NULL;
293 if (overwrite || !iface->ifname[0])
294 ifname = ubus_get_ifname(name);
298 if ((c = tb[IFACE_ATTR_IFNAME]))
299 ifname = blobmsg_get_string(c);
300 else if ((c = tb[IFACE_ATTR_NETWORKID]))
301 ifname = blobmsg_get_string(c);
304 if (!iface->ifname[0] && !ifname)
308 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
310 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
315 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
316 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
318 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
319 iface->ignore = blobmsg_get_bool(c);
321 if ((c = tb[IFACE_ATTR_LEASETIME])) {
322 char *val = blobmsg_get_string(c), *endptr;
323 double time = strtod(val, &endptr);
324 if (time && endptr[0]) {
325 if (endptr[0] == 's')
327 else if (endptr[0] == 'm')
329 else if (endptr[0] == 'h')
331 else if (endptr[0] == 'd')
333 else if (endptr[0] == 'w')
334 time *= 7 * 24 * 3600;
340 iface->dhcpv4_leasetime = time;
343 if ((c = tb[IFACE_ATTR_START])) {
344 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
347 iface->dhcpv4 = RELAYD_SERVER;
350 if ((c = tb[IFACE_ATTR_LIMIT]))
351 iface->dhcpv4_end.s_addr = htonl(
352 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
354 if ((c = tb[IFACE_ATTR_MASTER]))
355 iface->master = blobmsg_get_bool(c);
357 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
358 struct blob_attr *cur;
361 blobmsg_for_each_attr(cur, c, rem) {
362 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
365 iface->upstream = realloc(iface->upstream,
366 iface->upstream_len + blobmsg_data_len(cur));
367 if (!iface->upstream)
370 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
371 iface->upstream_len += blobmsg_data_len(cur);
376 if ((c = tb[IFACE_ATTR_RA])) {
377 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
383 if ((c = tb[IFACE_ATTR_DHCPV4])) {
384 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
385 iface->dhcpv4 = mode;
390 if ((c = tb[IFACE_ATTR_DHCPV6])) {
391 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
392 iface->dhcpv6 = mode;
397 if ((c = tb[IFACE_ATTR_NDP])) {
398 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
404 if ((c = tb[IFACE_ATTR_DNS])) {
405 struct blob_attr *cur;
408 iface->always_rewrite_dns = true;
409 blobmsg_for_each_attr(cur, c, rem) {
410 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
413 struct in_addr addr4;
414 struct in6_addr addr6;
415 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
416 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
417 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
418 if (!iface->dhcpv4_dns)
421 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
422 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
423 iface->dns = realloc(iface->dns,
424 (++iface->dns_cnt) * sizeof(*iface->dns));
428 iface->dns[iface->dns_cnt - 1] = addr6;
435 if ((c = tb[IFACE_ATTR_DOMAIN])) {
436 struct blob_attr *cur;
439 blobmsg_for_each_attr(cur, c, rem) {
440 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
444 int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
448 iface->search = realloc(iface->search, iface->search_len + len);
452 memcpy(&iface->search[iface->search_len], buf, len);
453 iface->search_len += len;
457 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
458 iface->default_router = blobmsg_get_u32(c);
460 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
461 iface->managed = blobmsg_get_u32(c);
465 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
466 iface->ra_not_onlink = blobmsg_get_bool(c);
468 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
469 const char *prio = blobmsg_get_string(c);
471 if (!strcmp(prio, "high"))
472 iface->route_preference = 1;
473 else if (!strcmp(prio, "low"))
474 iface->route_preference = -1;
475 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
476 iface->route_preference = 0;
481 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
482 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
483 sizeof(iface->dhcpv6_pd_manager) - 1);
485 if ((c = tb[IFACE_ATTR_PD_CER]) &&
486 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
489 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
490 iface->learn_routes = blobmsg_get_bool(c);
492 iface->learn_routes = true;
494 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
495 iface->external = blobmsg_get_bool(c);
497 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
498 struct blob_attr *cur;
501 blobmsg_for_each_attr(cur, c, rem) {
502 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
505 int len = blobmsg_data_len(cur);
506 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
507 if (!iface->static_ndp)
510 if (iface->static_ndp_len)
511 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
513 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
514 iface->static_ndp_len += len;
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);