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,
36 IFACE_ATTR_FILTER_CLASS,
37 IFACE_ATTR_DHCPV6_RAW,
38 IFACE_ATTR_RA_DEFAULT,
39 IFACE_ATTR_RA_MANAGEMENT,
40 IFACE_ATTR_RA_OFFLINK,
41 IFACE_ATTR_RA_PREFERENCE,
42 IFACE_ATTR_RA_ADVROUTER,
43 IFACE_ATTR_PD_MANAGER,
45 IFACE_ATTR_NDPROXY_ROUTING,
46 IFACE_ATTR_NDPROXY_SLAVE,
47 IFACE_ATTR_NDPROXY_STATIC,
51 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
52 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
53 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
54 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
55 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
56 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
57 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
58 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
59 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
60 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
61 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
62 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
63 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
64 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
65 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
66 [IFACE_ATTR_ROUTER] = { .name = "router", .type = BLOBMSG_TYPE_ARRAY },
67 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
68 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
69 [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
70 [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
71 [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
72 [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
73 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
74 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
75 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
76 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
77 [IFACE_ATTR_RA_ADVROUTER] = { .name = "ra_advrouter", .type = BLOBMSG_TYPE_BOOL },
78 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
79 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
80 [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
83 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
84 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
85 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
86 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
87 [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
90 const struct uci_blob_param_list interface_attr_list = {
91 .n_params = IFACE_ATTR_MAX,
92 .params = iface_attrs,
93 .info = iface_attr_info,
107 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
108 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
109 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
110 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
111 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
112 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
116 const struct uci_blob_param_list lease_attr_list = {
117 .n_params = LEASE_ATTR_MAX,
118 .params = lease_attrs,
123 ODHCPD_ATTR_MAINDHCP,
124 ODHCPD_ATTR_LEASEFILE,
125 ODHCPD_ATTR_LEASETRIGGER,
130 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
131 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
132 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
133 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
137 const struct uci_blob_param_list odhcpd_attr_list = {
138 .n_params = ODHCPD_ATTR_MAX,
139 .params = odhcpd_attrs,
143 static struct interface* get_interface(const char *name)
146 list_for_each_entry(c, &interfaces, head)
147 if (!strcmp(c->name, name))
153 static void clean_interface(struct interface *iface)
157 free(iface->upstream);
158 free(iface->static_ndp);
159 free(iface->dhcpv4_router);
160 free(iface->dhcpv4_dns);
161 free(iface->dhcpv6_raw);
162 free(iface->filter_class);
163 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
167 static void close_interface(struct interface *iface)
169 if (iface->head.next)
170 list_del(&iface->head);
172 setup_router_interface(iface, false);
173 setup_dhcpv6_interface(iface, false);
174 setup_ndp_interface(iface, false);
175 setup_dhcpv4_interface(iface, false);
177 clean_interface(iface);
182 static int parse_mode(const char *mode)
184 if (!strcmp(mode, "disabled")) {
185 return RELAYD_DISABLED;
186 } else if (!strcmp(mode, "server")) {
187 return RELAYD_SERVER;
188 } else if (!strcmp(mode, "relay")) {
190 } else if (!strcmp(mode, "hybrid")) {
191 return RELAYD_HYBRID;
198 static void set_config(struct uci_section *s)
200 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
202 blob_buf_init(&b, 0);
203 uci_to_blob(&b, s, &odhcpd_attr_list);
204 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
206 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
207 config.legacy = blobmsg_get_bool(c);
209 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
210 free(config.dhcp_statefile);
211 config.dhcp_statefile = strdup(blobmsg_get_string(c));
214 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
215 free(config.dhcp_cb);
216 config.dhcp_cb = strdup(blobmsg_get_string(c));
221 static int set_lease(struct uci_section *s)
223 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
225 blob_buf_init(&b, 0);
226 uci_to_blob(&b, s, &lease_attr_list);
227 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
230 if ((c = tb[LEASE_ATTR_NAME]))
231 hostlen = blobmsg_data_len(c);
233 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
238 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
240 if ((c = tb[LEASE_ATTR_IP]))
241 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
244 if ((c = tb[LEASE_ATTR_MAC]))
245 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
248 if ((c = tb[LEASE_ATTR_DUID])) {
249 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
250 lease->duid = malloc(duidlen);
254 ssize_t len = odhcpd_unhexlify(lease->duid,
255 duidlen, blobmsg_get_string(c));
260 lease->duid_len = len;
263 if ((c = tb[LEASE_ATTR_HOSTID])) {
265 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
270 list_add(&lease->head, &leases);
282 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
284 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
285 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
287 if (tb[IFACE_ATTR_INTERFACE])
288 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
293 struct interface *iface = get_interface(name);
295 iface = calloc(1, sizeof(*iface));
299 strncpy(iface->name, name, sizeof(iface->name) - 1);
300 list_add(&iface->head, &interfaces);
304 const char *ifname = NULL;
306 if (overwrite || !iface->ifname[0])
307 ifname = ubus_get_ifname(name);
311 if ((c = tb[IFACE_ATTR_IFNAME]))
312 ifname = blobmsg_get_string(c);
313 else if ((c = tb[IFACE_ATTR_NETWORKID]))
314 ifname = blobmsg_get_string(c);
317 if (!iface->ifname[0] && !ifname)
321 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
323 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
328 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
329 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
331 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
332 iface->ignore = blobmsg_get_bool(c);
334 if ((c = tb[IFACE_ATTR_LEASETIME])) {
335 char *val = blobmsg_get_string(c), *endptr;
336 double time = strtod(val, &endptr);
337 if (time && endptr[0]) {
338 if (endptr[0] == 's')
340 else if (endptr[0] == 'm')
342 else if (endptr[0] == 'h')
344 else if (endptr[0] == 'd')
346 else if (endptr[0] == 'w')
347 time *= 7 * 24 * 3600;
353 iface->dhcpv4_leasetime = time;
356 if ((c = tb[IFACE_ATTR_START])) {
357 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
360 iface->dhcpv4 = RELAYD_SERVER;
363 if ((c = tb[IFACE_ATTR_LIMIT]))
364 iface->dhcpv4_end.s_addr = htonl(
365 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
367 if ((c = tb[IFACE_ATTR_MASTER]))
368 iface->master = blobmsg_get_bool(c);
370 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
371 struct blob_attr *cur;
374 blobmsg_for_each_attr(cur, c, rem) {
375 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
378 iface->upstream = realloc(iface->upstream,
379 iface->upstream_len + blobmsg_data_len(cur));
380 if (!iface->upstream)
383 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
384 iface->upstream_len += blobmsg_data_len(cur);
389 if ((c = tb[IFACE_ATTR_RA])) {
390 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
396 if ((c = tb[IFACE_ATTR_DHCPV4])) {
397 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
398 iface->dhcpv4 = mode;
403 if ((c = tb[IFACE_ATTR_DHCPV6])) {
404 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
405 iface->dhcpv6 = mode;
410 if ((c = tb[IFACE_ATTR_NDP])) {
411 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
417 if ((c = tb[IFACE_ATTR_ROUTER])) {
418 struct blob_attr *cur;
421 blobmsg_for_each_attr(cur, c, rem) {
422 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
425 struct in_addr addr4;
426 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
427 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
428 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
429 if (!iface->dhcpv4_router)
432 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
439 if ((c = tb[IFACE_ATTR_DNS])) {
440 struct blob_attr *cur;
443 iface->always_rewrite_dns = true;
444 blobmsg_for_each_attr(cur, c, rem) {
445 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
448 struct in_addr addr4;
449 struct in6_addr addr6;
450 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
451 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
452 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
453 if (!iface->dhcpv4_dns)
456 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
457 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
458 iface->dns = realloc(iface->dns,
459 (++iface->dns_cnt) * sizeof(*iface->dns));
463 iface->dns[iface->dns_cnt - 1] = addr6;
470 if ((c = tb[IFACE_ATTR_DOMAIN])) {
471 struct blob_attr *cur;
474 blobmsg_for_each_attr(cur, c, rem) {
475 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
479 char *domain = blobmsg_get_string(cur);
480 size_t domainlen = strlen(domain);
481 if (domainlen > 0 && domain[domainlen - 1] == '.')
482 domain[domainlen - 1] = 0;
484 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
488 iface->search = realloc(iface->search, iface->search_len + len);
492 memcpy(&iface->search[iface->search_len], buf, len);
493 iface->search_len += len;
497 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
498 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
499 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
502 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
503 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
504 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
505 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
508 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
509 iface->default_router = blobmsg_get_u32(c);
511 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
512 iface->managed = blobmsg_get_u32(c);
516 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
517 iface->ra_not_onlink = blobmsg_get_bool(c);
519 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
520 iface->ra_advrouter = blobmsg_get_bool(c);
522 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
523 const char *prio = blobmsg_get_string(c);
525 if (!strcmp(prio, "high"))
526 iface->route_preference = 1;
527 else if (!strcmp(prio, "low"))
528 iface->route_preference = -1;
529 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
530 iface->route_preference = 0;
535 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
536 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
537 sizeof(iface->dhcpv6_pd_manager) - 1);
539 if ((c = tb[IFACE_ATTR_PD_CER]) &&
540 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
543 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
544 iface->learn_routes = blobmsg_get_bool(c);
546 iface->learn_routes = true;
548 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
549 iface->external = blobmsg_get_bool(c);
551 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
552 struct blob_attr *cur;
555 blobmsg_for_each_attr(cur, c, rem) {
556 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
559 int len = blobmsg_data_len(cur);
560 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
561 if (!iface->static_ndp)
564 if (iface->static_ndp_len)
565 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
567 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
568 iface->static_ndp_len += len;
575 close_interface(iface);
579 static int set_interface(struct uci_section *s)
581 blob_buf_init(&b, 0);
582 uci_to_blob(&b, s, &interface_attr_list);
583 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
587 void odhcpd_reload(void)
589 struct uci_context *uci = uci_alloc_context();
590 while (!list_empty(&leases)) {
591 struct lease *l = list_first_entry(&leases, struct lease, head);
597 struct interface *master = NULL, *i, *n;
602 list_for_each_entry(i, &interfaces, head)
605 struct uci_package *dhcp = NULL;
606 if (!uci_load(uci, "dhcp", &dhcp)) {
607 struct uci_element *e;
608 uci_foreach_element(&dhcp->sections, e) {
609 struct uci_section *s = uci_to_section(e);
610 if (!strcmp(s->type, "host"))
612 else if (!strcmp(s->type, "odhcpd"))
616 uci_foreach_element(&dhcp->sections, e) {
617 struct uci_section *s = uci_to_section(e);
618 if (!strcmp(s->type, "dhcp"))
625 ubus_apply_network();
628 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
631 list_for_each_entry(i, &interfaces, head) {
635 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
636 any_dhcpv6_slave = true;
638 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
641 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
642 any_ndp_slave = true;
645 // Evaluate hybrid mode for master
646 list_for_each_entry(i, &interfaces, head) {
650 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
652 if (!ubus_has_prefix(i->name, i->ifname))
653 hybrid_mode = RELAYD_RELAY;
656 if (i->dhcpv6 == RELAYD_HYBRID)
657 i->dhcpv6 = hybrid_mode;
659 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
660 i->dhcpv6 = RELAYD_DISABLED;
662 if (i->ra == RELAYD_HYBRID)
665 if (i->ra == RELAYD_RELAY && !any_ra_slave)
666 i->ra = RELAYD_DISABLED;
668 if (i->ndp == RELAYD_HYBRID)
669 i->ndp = hybrid_mode;
671 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
672 i->ndp = RELAYD_DISABLED;
674 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
679 list_for_each_entry_safe(i, n, &interfaces, head) {
681 // Resolve hybrid mode
682 if (i->dhcpv6 == RELAYD_HYBRID)
683 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
684 RELAYD_RELAY : RELAYD_SERVER;
686 if (i->ra == RELAYD_HYBRID)
687 i->ra = (master && master->ra == RELAYD_RELAY) ?
688 RELAYD_RELAY : RELAYD_SERVER;
690 if (i->ndp == RELAYD_HYBRID)
691 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
692 RELAYD_RELAY : RELAYD_DISABLED;
694 setup_router_interface(i, true);
695 setup_dhcpv6_interface(i, true);
696 setup_ndp_interface(i, true);
697 setup_dhcpv4_interface(i, true);
703 uci_unload(uci, dhcp);
704 uci_free_context(uci);
708 static void handle_signal(int signal)
711 if (signal == SIGHUP)
712 write(reload_pipe[1], b, sizeof(b));
719 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
722 read(u->fd, b, sizeof(b));
726 static struct uloop_fd reload_fd = { .cb = reload_cb };
728 void odhcpd_run(void)
730 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
731 reload_fd.fd = reload_pipe[0];
732 uloop_fd_add(&reload_fd, ULOOP_READ);
734 signal(SIGTERM, handle_signal);
735 signal(SIGINT, handle_signal);
736 signal(SIGHUP, handle_signal);