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_RA_MAXINTERVAL,
44 IFACE_ATTR_PD_MANAGER,
46 IFACE_ATTR_NDPROXY_ROUTING,
47 IFACE_ATTR_NDPROXY_SLAVE,
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_RA_MAXINTERVAL] = { .name = "ra_maxinterval", .type = BLOBMSG_TYPE_INT32 },
79 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
80 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
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 },
89 const struct uci_blob_param_list interface_attr_list = {
90 .n_params = IFACE_ATTR_MAX,
91 .params = iface_attrs,
92 .info = iface_attr_info,
101 LEASE_ATTR_LEASETIME,
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_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
113 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
117 const struct uci_blob_param_list lease_attr_list = {
118 .n_params = LEASE_ATTR_MAX,
119 .params = lease_attrs,
124 ODHCPD_ATTR_MAINDHCP,
125 ODHCPD_ATTR_LEASEFILE,
126 ODHCPD_ATTR_LEASETRIGGER,
131 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
132 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
133 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
134 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
138 const struct uci_blob_param_list odhcpd_attr_list = {
139 .n_params = ODHCPD_ATTR_MAX,
140 .params = odhcpd_attrs,
144 static struct interface* get_interface(const char *name)
147 list_for_each_entry(c, &interfaces, head)
148 if (!strcmp(c->name, name))
154 static void clean_interface(struct interface *iface)
158 free(iface->upstream);
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));
220 static double parse_leasetime(struct blob_attr *c) {
221 char *val = blobmsg_get_string(c), *endptr = NULL;
222 double time = strcmp(val, "infinite") ? strtod(val, &endptr) : UINT32_MAX;
224 if (time && endptr && endptr[0]) {
225 if (endptr[0] == 's')
227 else if (endptr[0] == 'm')
229 else if (endptr[0] == 'h')
231 else if (endptr[0] == 'd')
233 else if (endptr[0] == 'w')
234 time *= 7 * 24 * 3600;
248 static int set_lease(struct uci_section *s)
250 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
252 blob_buf_init(&b, 0);
253 uci_to_blob(&b, s, &lease_attr_list);
254 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
257 if ((c = tb[LEASE_ATTR_NAME]))
258 hostlen = blobmsg_data_len(c);
260 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
265 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
267 if ((c = tb[LEASE_ATTR_IP]))
268 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
271 if ((c = tb[LEASE_ATTR_MAC]))
272 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
275 if ((c = tb[LEASE_ATTR_DUID])) {
276 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
277 lease->duid = malloc(duidlen);
281 ssize_t len = odhcpd_unhexlify(lease->duid,
282 duidlen, blobmsg_get_string(c));
287 lease->duid_len = len;
290 if ((c = tb[LEASE_ATTR_HOSTID])) {
292 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
297 if ((c = tb[LEASE_ATTR_LEASETIME])) {
298 double time = parse_leasetime(c);
303 lease->dhcpv4_leasetime = time;
306 list_add(&lease->head, &leases);
318 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
320 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
321 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
323 if (tb[IFACE_ATTR_INTERFACE])
324 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
329 struct interface *iface = get_interface(name);
331 iface = calloc(1, sizeof(*iface));
335 strncpy(iface->name, name, sizeof(iface->name) - 1);
337 /* Default settings */
339 iface->learn_routes = true;
341 list_add(&iface->head, &interfaces);
345 const char *ifname = NULL;
347 if ((c = tb[IFACE_ATTR_IFNAME]))
348 ifname = blobmsg_get_string(c);
349 else if ((c = tb[IFACE_ATTR_NETWORKID]))
350 ifname = blobmsg_get_string(c);
354 if (overwrite || !iface->ifname[0])
355 ifname = ubus_get_ifname(name);
358 if (!iface->ifname[0] && !ifname)
362 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
364 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
369 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
370 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
372 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
373 iface->ignore = blobmsg_get_bool(c);
375 if ((c = tb[IFACE_ATTR_LEASETIME])) {
376 double time = parse_leasetime(c);
381 iface->dhcpv4_leasetime = time;
384 if ((c = tb[IFACE_ATTR_START])) {
385 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
388 iface->dhcpv4 = RELAYD_SERVER;
391 if ((c = tb[IFACE_ATTR_LIMIT]))
392 iface->dhcpv4_end.s_addr = htonl(
393 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
395 if ((c = tb[IFACE_ATTR_MASTER]))
396 iface->master = blobmsg_get_bool(c);
398 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
399 struct blob_attr *cur;
402 blobmsg_for_each_attr(cur, c, rem) {
403 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
406 iface->upstream = realloc(iface->upstream,
407 iface->upstream_len + blobmsg_data_len(cur));
408 if (!iface->upstream)
411 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
412 iface->upstream_len += blobmsg_data_len(cur);
417 if ((c = tb[IFACE_ATTR_RA])) {
418 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
424 if ((c = tb[IFACE_ATTR_DHCPV4])) {
425 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
426 iface->dhcpv4 = mode;
431 if ((c = tb[IFACE_ATTR_DHCPV6])) {
432 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
433 iface->dhcpv6 = mode;
438 if ((c = tb[IFACE_ATTR_NDP])) {
439 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
445 if ((c = tb[IFACE_ATTR_ROUTER])) {
446 struct blob_attr *cur;
449 blobmsg_for_each_attr(cur, c, rem) {
450 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
453 struct in_addr addr4;
454 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
455 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
456 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
457 if (!iface->dhcpv4_router)
460 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
467 if ((c = tb[IFACE_ATTR_DNS])) {
468 struct blob_attr *cur;
471 iface->always_rewrite_dns = true;
472 blobmsg_for_each_attr(cur, c, rem) {
473 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
476 struct in_addr addr4;
477 struct in6_addr addr6;
478 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
479 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
480 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
481 if (!iface->dhcpv4_dns)
484 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
485 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
486 iface->dns = realloc(iface->dns,
487 (++iface->dns_cnt) * sizeof(*iface->dns));
491 iface->dns[iface->dns_cnt - 1] = addr6;
498 if ((c = tb[IFACE_ATTR_DOMAIN])) {
499 struct blob_attr *cur;
502 blobmsg_for_each_attr(cur, c, rem) {
503 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
507 char *domain = blobmsg_get_string(cur);
508 size_t domainlen = strlen(domain);
509 if (domainlen > 0 && domain[domainlen - 1] == '.')
510 domain[domainlen - 1] = 0;
512 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
516 iface->search = realloc(iface->search, iface->search_len + len);
520 memcpy(&iface->search[iface->search_len], buf, len);
521 iface->search_len += len;
525 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
526 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
527 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
530 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
531 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
532 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
533 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
536 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
537 iface->default_router = blobmsg_get_u32(c);
539 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
540 iface->managed = blobmsg_get_u32(c);
542 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
543 iface->ra_not_onlink = blobmsg_get_bool(c);
545 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
546 iface->ra_advrouter = blobmsg_get_bool(c);
548 if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
549 iface->ra_maxinterval = blobmsg_get_u32(c);
551 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
552 const char *prio = blobmsg_get_string(c);
554 if (!strcmp(prio, "high"))
555 iface->route_preference = 1;
556 else if (!strcmp(prio, "low"))
557 iface->route_preference = -1;
558 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
559 iface->route_preference = 0;
564 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
565 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
566 sizeof(iface->dhcpv6_pd_manager) - 1);
568 if ((c = tb[IFACE_ATTR_PD_CER]) &&
569 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
572 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
573 iface->learn_routes = blobmsg_get_bool(c);
575 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
576 iface->external = blobmsg_get_bool(c);
581 close_interface(iface);
585 static int set_interface(struct uci_section *s)
587 blob_buf_init(&b, 0);
588 uci_to_blob(&b, s, &interface_attr_list);
589 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
593 void odhcpd_reload(void)
595 struct uci_context *uci = uci_alloc_context();
596 while (!list_empty(&leases)) {
597 struct lease *l = list_first_entry(&leases, struct lease, head);
603 struct interface *master = NULL, *i, *n;
608 list_for_each_entry(i, &interfaces, head)
611 struct uci_package *dhcp = NULL;
612 if (!uci_load(uci, "dhcp", &dhcp)) {
613 struct uci_element *e;
614 uci_foreach_element(&dhcp->sections, e) {
615 struct uci_section *s = uci_to_section(e);
616 if (!strcmp(s->type, "host"))
618 else if (!strcmp(s->type, "odhcpd"))
622 uci_foreach_element(&dhcp->sections, e) {
623 struct uci_section *s = uci_to_section(e);
624 if (!strcmp(s->type, "dhcp"))
631 ubus_apply_network();
634 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
637 list_for_each_entry(i, &interfaces, head) {
641 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
642 any_dhcpv6_slave = true;
644 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
647 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
648 any_ndp_slave = true;
651 // Evaluate hybrid mode for master
652 list_for_each_entry(i, &interfaces, head) {
656 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
658 if (!ubus_has_prefix(i->name, i->ifname))
659 hybrid_mode = RELAYD_RELAY;
662 if (i->dhcpv6 == RELAYD_HYBRID)
663 i->dhcpv6 = hybrid_mode;
665 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
666 i->dhcpv6 = RELAYD_DISABLED;
668 if (i->ra == RELAYD_HYBRID)
671 if (i->ra == RELAYD_RELAY && !any_ra_slave)
672 i->ra = RELAYD_DISABLED;
674 if (i->ndp == RELAYD_HYBRID)
675 i->ndp = hybrid_mode;
677 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
678 i->ndp = RELAYD_DISABLED;
680 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
685 list_for_each_entry_safe(i, n, &interfaces, head) {
687 // Resolve hybrid mode
688 if (i->dhcpv6 == RELAYD_HYBRID)
689 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
690 RELAYD_RELAY : RELAYD_SERVER;
692 if (i->ra == RELAYD_HYBRID)
693 i->ra = (master && master->ra == RELAYD_RELAY) ?
694 RELAYD_RELAY : RELAYD_SERVER;
696 if (i->ndp == RELAYD_HYBRID)
697 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
698 RELAYD_RELAY : RELAYD_DISABLED;
700 setup_router_interface(i, !i->ignore);
701 setup_dhcpv6_interface(i, !i->ignore);
702 setup_ndp_interface(i, !i->ignore);
703 setup_dhcpv4_interface(i, !i->ignore);
709 uci_unload(uci, dhcp);
710 uci_free_context(uci);
714 static void handle_signal(int signal)
718 if (signal == SIGHUP) {
719 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
726 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
729 if (read(u->fd, b, sizeof(b)) < 0) {}
733 static struct uloop_fd reload_fd = { .cb = reload_cb };
735 void odhcpd_run(void)
737 if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
738 reload_fd.fd = reload_pipe[0];
739 uloop_fd_add(&reload_fd, ULOOP_READ);
741 signal(SIGTERM, handle_signal);
742 signal(SIGINT, handle_signal);
743 signal(SIGHUP, handle_signal);
753 while (!list_empty(&interfaces))
754 close_interface(list_first_entry(&interfaces, struct interface, head));