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);
336 list_add(&iface->head, &interfaces);
340 const char *ifname = NULL;
342 if ((c = tb[IFACE_ATTR_IFNAME]))
343 ifname = blobmsg_get_string(c);
344 else if ((c = tb[IFACE_ATTR_NETWORKID]))
345 ifname = blobmsg_get_string(c);
349 if (overwrite || !iface->ifname[0])
350 ifname = ubus_get_ifname(name);
353 if (!iface->ifname[0] && !ifname)
357 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
359 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
364 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
365 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
367 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
368 iface->ignore = blobmsg_get_bool(c);
370 if ((c = tb[IFACE_ATTR_LEASETIME])) {
371 double time = parse_leasetime(c);
376 iface->dhcpv4_leasetime = time;
379 if ((c = tb[IFACE_ATTR_START])) {
380 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
383 iface->dhcpv4 = RELAYD_SERVER;
386 if ((c = tb[IFACE_ATTR_LIMIT]))
387 iface->dhcpv4_end.s_addr = htonl(
388 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
390 if ((c = tb[IFACE_ATTR_MASTER]))
391 iface->master = blobmsg_get_bool(c);
393 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
394 struct blob_attr *cur;
397 blobmsg_for_each_attr(cur, c, rem) {
398 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
401 iface->upstream = realloc(iface->upstream,
402 iface->upstream_len + blobmsg_data_len(cur));
403 if (!iface->upstream)
406 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
407 iface->upstream_len += blobmsg_data_len(cur);
412 if ((c = tb[IFACE_ATTR_RA])) {
413 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
419 if ((c = tb[IFACE_ATTR_DHCPV4])) {
420 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
421 iface->dhcpv4 = mode;
426 if ((c = tb[IFACE_ATTR_DHCPV6])) {
427 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
428 iface->dhcpv6 = mode;
433 if ((c = tb[IFACE_ATTR_NDP])) {
434 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
440 if ((c = tb[IFACE_ATTR_ROUTER])) {
441 struct blob_attr *cur;
444 blobmsg_for_each_attr(cur, c, rem) {
445 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
448 struct in_addr addr4;
449 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
450 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
451 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
452 if (!iface->dhcpv4_router)
455 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
462 if ((c = tb[IFACE_ATTR_DNS])) {
463 struct blob_attr *cur;
466 iface->always_rewrite_dns = true;
467 blobmsg_for_each_attr(cur, c, rem) {
468 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
471 struct in_addr addr4;
472 struct in6_addr addr6;
473 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
474 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
475 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
476 if (!iface->dhcpv4_dns)
479 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
480 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
481 iface->dns = realloc(iface->dns,
482 (++iface->dns_cnt) * sizeof(*iface->dns));
486 iface->dns[iface->dns_cnt - 1] = addr6;
493 if ((c = tb[IFACE_ATTR_DOMAIN])) {
494 struct blob_attr *cur;
497 blobmsg_for_each_attr(cur, c, rem) {
498 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
502 char *domain = blobmsg_get_string(cur);
503 size_t domainlen = strlen(domain);
504 if (domainlen > 0 && domain[domainlen - 1] == '.')
505 domain[domainlen - 1] = 0;
507 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
511 iface->search = realloc(iface->search, iface->search_len + len);
515 memcpy(&iface->search[iface->search_len], buf, len);
516 iface->search_len += len;
520 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
521 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
522 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
525 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
526 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
527 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
528 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
531 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
532 iface->default_router = blobmsg_get_u32(c);
534 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
535 iface->managed = blobmsg_get_u32(c);
539 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
540 iface->ra_not_onlink = blobmsg_get_bool(c);
542 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
543 iface->ra_advrouter = blobmsg_get_bool(c);
545 if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
546 iface->ra_maxinterval = blobmsg_get_u32(c);
548 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
549 const char *prio = blobmsg_get_string(c);
551 if (!strcmp(prio, "high"))
552 iface->route_preference = 1;
553 else if (!strcmp(prio, "low"))
554 iface->route_preference = -1;
555 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
556 iface->route_preference = 0;
561 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
562 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
563 sizeof(iface->dhcpv6_pd_manager) - 1);
565 if ((c = tb[IFACE_ATTR_PD_CER]) &&
566 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
569 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
570 iface->learn_routes = blobmsg_get_bool(c);
572 iface->learn_routes = true;
574 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
575 iface->external = blobmsg_get_bool(c);
580 close_interface(iface);
584 static int set_interface(struct uci_section *s)
586 blob_buf_init(&b, 0);
587 uci_to_blob(&b, s, &interface_attr_list);
588 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
592 void odhcpd_reload(void)
594 struct uci_context *uci = uci_alloc_context();
595 while (!list_empty(&leases)) {
596 struct lease *l = list_first_entry(&leases, struct lease, head);
602 struct interface *master = NULL, *i, *n;
607 list_for_each_entry(i, &interfaces, head)
610 struct uci_package *dhcp = NULL;
611 if (!uci_load(uci, "dhcp", &dhcp)) {
612 struct uci_element *e;
613 uci_foreach_element(&dhcp->sections, e) {
614 struct uci_section *s = uci_to_section(e);
615 if (!strcmp(s->type, "host"))
617 else if (!strcmp(s->type, "odhcpd"))
621 uci_foreach_element(&dhcp->sections, e) {
622 struct uci_section *s = uci_to_section(e);
623 if (!strcmp(s->type, "dhcp"))
630 ubus_apply_network();
633 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
636 list_for_each_entry(i, &interfaces, head) {
640 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
641 any_dhcpv6_slave = true;
643 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
646 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
647 any_ndp_slave = true;
650 // Evaluate hybrid mode for master
651 list_for_each_entry(i, &interfaces, head) {
655 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
657 if (!ubus_has_prefix(i->name, i->ifname))
658 hybrid_mode = RELAYD_RELAY;
661 if (i->dhcpv6 == RELAYD_HYBRID)
662 i->dhcpv6 = hybrid_mode;
664 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
665 i->dhcpv6 = RELAYD_DISABLED;
667 if (i->ra == RELAYD_HYBRID)
670 if (i->ra == RELAYD_RELAY && !any_ra_slave)
671 i->ra = RELAYD_DISABLED;
673 if (i->ndp == RELAYD_HYBRID)
674 i->ndp = hybrid_mode;
676 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
677 i->ndp = RELAYD_DISABLED;
679 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
684 list_for_each_entry_safe(i, n, &interfaces, head) {
686 // Resolve hybrid mode
687 if (i->dhcpv6 == RELAYD_HYBRID)
688 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
689 RELAYD_RELAY : RELAYD_SERVER;
691 if (i->ra == RELAYD_HYBRID)
692 i->ra = (master && master->ra == RELAYD_RELAY) ?
693 RELAYD_RELAY : RELAYD_SERVER;
695 if (i->ndp == RELAYD_HYBRID)
696 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
697 RELAYD_RELAY : RELAYD_DISABLED;
699 setup_router_interface(i, true);
700 setup_dhcpv6_interface(i, true);
701 setup_ndp_interface(i, true);
702 setup_dhcpv4_interface(i, true);
708 uci_unload(uci, dhcp);
709 uci_free_context(uci);
713 static void handle_signal(int signal)
717 if (signal == SIGHUP) {
718 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
725 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
728 if (read(u->fd, b, sizeof(b)) < 0) {}
732 static struct uloop_fd reload_fd = { .cb = reload_cb };
734 void odhcpd_run(void)
736 if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
737 reload_fd.fd = reload_pipe[0];
738 uloop_fd_add(&reload_fd, ULOOP_READ);
740 signal(SIGTERM, handle_signal);
741 signal(SIGINT, handle_signal);
742 signal(SIGHUP, handle_signal);
752 while (!list_empty(&interfaces))
753 close_interface(list_first_entry(&interfaces, struct interface, head));