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;
222 double time = strtod(val, &endptr);
223 if (time && endptr[0]) {
224 if (endptr[0] == 's')
226 else if (endptr[0] == 'm')
228 else if (endptr[0] == 'h')
230 else if (endptr[0] == 'd')
232 else if (endptr[0] == 'w')
233 time *= 7 * 24 * 3600;
247 static int set_lease(struct uci_section *s)
249 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
251 blob_buf_init(&b, 0);
252 uci_to_blob(&b, s, &lease_attr_list);
253 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
256 if ((c = tb[LEASE_ATTR_NAME]))
257 hostlen = blobmsg_data_len(c);
259 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
264 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
266 if ((c = tb[LEASE_ATTR_IP]))
267 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
270 if ((c = tb[LEASE_ATTR_MAC]))
271 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
274 if ((c = tb[LEASE_ATTR_DUID])) {
275 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
276 lease->duid = malloc(duidlen);
280 ssize_t len = odhcpd_unhexlify(lease->duid,
281 duidlen, blobmsg_get_string(c));
286 lease->duid_len = len;
289 if ((c = tb[LEASE_ATTR_HOSTID])) {
291 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
296 if ((c = tb[LEASE_ATTR_LEASETIME])) {
297 double time = parse_leasetime(c);
302 lease->dhcpv4_leasetime = time;
305 list_add(&lease->head, &leases);
317 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
319 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
320 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
322 if (tb[IFACE_ATTR_INTERFACE])
323 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
328 struct interface *iface = get_interface(name);
330 iface = calloc(1, sizeof(*iface));
334 strncpy(iface->name, name, sizeof(iface->name) - 1);
335 list_add(&iface->head, &interfaces);
339 const char *ifname = NULL;
341 if ((c = tb[IFACE_ATTR_IFNAME]))
342 ifname = blobmsg_get_string(c);
343 else if ((c = tb[IFACE_ATTR_NETWORKID]))
344 ifname = blobmsg_get_string(c);
348 if (overwrite || !iface->ifname[0])
349 ifname = ubus_get_ifname(name);
352 if (!iface->ifname[0] && !ifname)
356 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
358 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
363 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
364 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
366 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
367 iface->ignore = blobmsg_get_bool(c);
369 if ((c = tb[IFACE_ATTR_LEASETIME])) {
370 double time = parse_leasetime(c);
375 iface->dhcpv4_leasetime = time;
378 if ((c = tb[IFACE_ATTR_START])) {
379 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
382 iface->dhcpv4 = RELAYD_SERVER;
385 if ((c = tb[IFACE_ATTR_LIMIT]))
386 iface->dhcpv4_end.s_addr = htonl(
387 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
389 if ((c = tb[IFACE_ATTR_MASTER]))
390 iface->master = blobmsg_get_bool(c);
392 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
393 struct blob_attr *cur;
396 blobmsg_for_each_attr(cur, c, rem) {
397 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
400 iface->upstream = realloc(iface->upstream,
401 iface->upstream_len + blobmsg_data_len(cur));
402 if (!iface->upstream)
405 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
406 iface->upstream_len += blobmsg_data_len(cur);
411 if ((c = tb[IFACE_ATTR_RA])) {
412 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
418 if ((c = tb[IFACE_ATTR_DHCPV4])) {
419 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
420 iface->dhcpv4 = mode;
425 if ((c = tb[IFACE_ATTR_DHCPV6])) {
426 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
427 iface->dhcpv6 = mode;
432 if ((c = tb[IFACE_ATTR_NDP])) {
433 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
439 if ((c = tb[IFACE_ATTR_ROUTER])) {
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, false))
447 struct in_addr addr4;
448 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
449 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
450 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
451 if (!iface->dhcpv4_router)
454 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
461 if ((c = tb[IFACE_ATTR_DNS])) {
462 struct blob_attr *cur;
465 iface->always_rewrite_dns = true;
466 blobmsg_for_each_attr(cur, c, rem) {
467 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
470 struct in_addr addr4;
471 struct in6_addr addr6;
472 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
473 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
474 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
475 if (!iface->dhcpv4_dns)
478 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
479 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
480 iface->dns = realloc(iface->dns,
481 (++iface->dns_cnt) * sizeof(*iface->dns));
485 iface->dns[iface->dns_cnt - 1] = addr6;
492 if ((c = tb[IFACE_ATTR_DOMAIN])) {
493 struct blob_attr *cur;
496 blobmsg_for_each_attr(cur, c, rem) {
497 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
501 char *domain = blobmsg_get_string(cur);
502 size_t domainlen = strlen(domain);
503 if (domainlen > 0 && domain[domainlen - 1] == '.')
504 domain[domainlen - 1] = 0;
506 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
510 iface->search = realloc(iface->search, iface->search_len + len);
514 memcpy(&iface->search[iface->search_len], buf, len);
515 iface->search_len += len;
519 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
520 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
521 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
524 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
525 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
526 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
527 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
530 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
531 iface->default_router = blobmsg_get_u32(c);
533 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
534 iface->managed = blobmsg_get_u32(c);
538 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
539 iface->ra_not_onlink = blobmsg_get_bool(c);
541 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
542 iface->ra_advrouter = blobmsg_get_bool(c);
544 if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
545 iface->ra_maxinterval = blobmsg_get_u32(c);
547 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
548 const char *prio = blobmsg_get_string(c);
550 if (!strcmp(prio, "high"))
551 iface->route_preference = 1;
552 else if (!strcmp(prio, "low"))
553 iface->route_preference = -1;
554 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
555 iface->route_preference = 0;
560 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
561 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
562 sizeof(iface->dhcpv6_pd_manager) - 1);
564 if ((c = tb[IFACE_ATTR_PD_CER]) &&
565 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
568 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
569 iface->learn_routes = blobmsg_get_bool(c);
571 iface->learn_routes = true;
573 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
574 iface->external = blobmsg_get_bool(c);
579 close_interface(iface);
583 static int set_interface(struct uci_section *s)
585 blob_buf_init(&b, 0);
586 uci_to_blob(&b, s, &interface_attr_list);
587 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
591 void odhcpd_reload(void)
593 struct uci_context *uci = uci_alloc_context();
594 while (!list_empty(&leases)) {
595 struct lease *l = list_first_entry(&leases, struct lease, head);
601 struct interface *master = NULL, *i, *n;
606 list_for_each_entry(i, &interfaces, head)
609 struct uci_package *dhcp = NULL;
610 if (!uci_load(uci, "dhcp", &dhcp)) {
611 struct uci_element *e;
612 uci_foreach_element(&dhcp->sections, e) {
613 struct uci_section *s = uci_to_section(e);
614 if (!strcmp(s->type, "host"))
616 else if (!strcmp(s->type, "odhcpd"))
620 uci_foreach_element(&dhcp->sections, e) {
621 struct uci_section *s = uci_to_section(e);
622 if (!strcmp(s->type, "dhcp"))
629 ubus_apply_network();
632 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
635 list_for_each_entry(i, &interfaces, head) {
639 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
640 any_dhcpv6_slave = true;
642 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
645 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
646 any_ndp_slave = true;
649 // Evaluate hybrid mode for master
650 list_for_each_entry(i, &interfaces, head) {
654 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
656 if (!ubus_has_prefix(i->name, i->ifname))
657 hybrid_mode = RELAYD_RELAY;
660 if (i->dhcpv6 == RELAYD_HYBRID)
661 i->dhcpv6 = hybrid_mode;
663 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
664 i->dhcpv6 = RELAYD_DISABLED;
666 if (i->ra == RELAYD_HYBRID)
669 if (i->ra == RELAYD_RELAY && !any_ra_slave)
670 i->ra = RELAYD_DISABLED;
672 if (i->ndp == RELAYD_HYBRID)
673 i->ndp = hybrid_mode;
675 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
676 i->ndp = RELAYD_DISABLED;
678 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
683 list_for_each_entry_safe(i, n, &interfaces, head) {
685 // Resolve hybrid mode
686 if (i->dhcpv6 == RELAYD_HYBRID)
687 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
688 RELAYD_RELAY : RELAYD_SERVER;
690 if (i->ra == RELAYD_HYBRID)
691 i->ra = (master && master->ra == RELAYD_RELAY) ?
692 RELAYD_RELAY : RELAYD_SERVER;
694 if (i->ndp == RELAYD_HYBRID)
695 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
696 RELAYD_RELAY : RELAYD_DISABLED;
698 setup_router_interface(i, true);
699 setup_dhcpv6_interface(i, true);
700 setup_ndp_interface(i, true);
701 setup_dhcpv4_interface(i, true);
707 uci_unload(uci, dhcp);
708 uci_free_context(uci);
712 static void handle_signal(int signal)
716 if (signal == SIGHUP) {
717 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
724 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
727 if (read(u->fd, b, sizeof(b)) < 0) {}
731 static struct uloop_fd reload_fd = { .cb = reload_cb };
733 void odhcpd_run(void)
735 if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
736 reload_fd.fd = reload_pipe[0];
737 uloop_fd_add(&reload_fd, ULOOP_READ);
739 signal(SIGTERM, handle_signal);
740 signal(SIGINT, handle_signal);
741 signal(SIGHUP, handle_signal);
751 while (!list_empty(&interfaces))
752 close_interface(list_first_entry(&interfaces, struct interface, head));