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_FILTER_CLASS,
36 IFACE_ATTR_DHCPV6_RAW,
37 IFACE_ATTR_RA_DEFAULT,
38 IFACE_ATTR_RA_MANAGEMENT,
39 IFACE_ATTR_RA_OFFLINK,
40 IFACE_ATTR_RA_PREFERENCE,
41 IFACE_ATTR_PD_MANAGER,
43 IFACE_ATTR_NDPROXY_ROUTING,
44 IFACE_ATTR_NDPROXY_SLAVE,
45 IFACE_ATTR_NDPROXY_STATIC,
49 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
50 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
51 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
52 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
53 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
54 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
55 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
56 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
57 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
58 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
59 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
60 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
61 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
62 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
63 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
64 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
65 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
66 [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
67 [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
68 [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
69 [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
70 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
71 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
72 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
73 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
74 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
75 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
76 [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
79 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
80 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
81 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
82 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
83 [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
86 const struct uci_blob_param_list interface_attr_list = {
87 .n_params = IFACE_ATTR_MAX,
88 .params = iface_attrs,
89 .info = iface_attr_info,
103 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
104 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
105 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
106 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
107 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
108 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
112 const struct uci_blob_param_list lease_attr_list = {
113 .n_params = LEASE_ATTR_MAX,
114 .params = lease_attrs,
119 ODHCPD_ATTR_MAINDHCP,
120 ODHCPD_ATTR_LEASEFILE,
121 ODHCPD_ATTR_LEASETRIGGER,
126 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
127 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
128 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
129 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
133 const struct uci_blob_param_list odhcpd_attr_list = {
134 .n_params = ODHCPD_ATTR_MAX,
135 .params = odhcpd_attrs,
139 static struct interface* get_interface(const char *name)
142 list_for_each_entry(c, &interfaces, head)
143 if (!strcmp(c->name, name))
149 static void clean_interface(struct interface *iface)
153 free(iface->upstream);
154 free(iface->static_ndp);
155 free(iface->dhcpv4_dns);
156 free(iface->dhcpv6_raw);
157 free(iface->filter_class);
158 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
162 static void close_interface(struct interface *iface)
164 if (iface->head.next)
165 list_del(&iface->head);
167 setup_router_interface(iface, false);
168 setup_dhcpv6_interface(iface, false);
169 setup_ndp_interface(iface, false);
170 setup_dhcpv4_interface(iface, false);
172 clean_interface(iface);
177 static int parse_mode(const char *mode)
179 if (!strcmp(mode, "disabled")) {
180 return RELAYD_DISABLED;
181 } else if (!strcmp(mode, "server")) {
182 return RELAYD_SERVER;
183 } else if (!strcmp(mode, "relay")) {
185 } else if (!strcmp(mode, "hybrid")) {
186 return RELAYD_HYBRID;
193 static void set_config(struct uci_section *s)
195 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
197 blob_buf_init(&b, 0);
198 uci_to_blob(&b, s, &odhcpd_attr_list);
199 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
201 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
202 config.legacy = blobmsg_get_bool(c);
204 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
205 free(config.dhcp_statefile);
206 config.dhcp_statefile = strdup(blobmsg_get_string(c));
209 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
210 free(config.dhcp_cb);
211 config.dhcp_cb = strdup(blobmsg_get_string(c));
216 static int set_lease(struct uci_section *s)
218 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
220 blob_buf_init(&b, 0);
221 uci_to_blob(&b, s, &lease_attr_list);
222 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
225 if ((c = tb[LEASE_ATTR_NAME]))
226 hostlen = blobmsg_data_len(c);
228 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
233 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
235 if ((c = tb[LEASE_ATTR_IP]))
236 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
239 if ((c = tb[LEASE_ATTR_MAC]))
240 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
243 if ((c = tb[LEASE_ATTR_DUID])) {
244 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
245 lease->duid = malloc(duidlen);
249 ssize_t len = odhcpd_unhexlify(lease->duid,
250 duidlen, blobmsg_get_string(c));
255 lease->duid_len = len;
258 if ((c = tb[LEASE_ATTR_HOSTID])) {
260 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
265 list_add(&lease->head, &leases);
277 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
279 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
280 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
282 if (tb[IFACE_ATTR_INTERFACE])
283 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
288 struct interface *iface = get_interface(name);
290 iface = calloc(1, sizeof(*iface));
294 strncpy(iface->name, name, sizeof(iface->name) - 1);
295 list_add(&iface->head, &interfaces);
299 const char *ifname = NULL;
301 if (overwrite || !iface->ifname[0])
302 ifname = ubus_get_ifname(name);
306 if ((c = tb[IFACE_ATTR_IFNAME]))
307 ifname = blobmsg_get_string(c);
308 else if ((c = tb[IFACE_ATTR_NETWORKID]))
309 ifname = blobmsg_get_string(c);
312 if (!iface->ifname[0] && !ifname)
316 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
318 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
323 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
324 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
326 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
327 iface->ignore = blobmsg_get_bool(c);
329 if ((c = tb[IFACE_ATTR_LEASETIME])) {
330 char *val = blobmsg_get_string(c), *endptr;
331 double time = strtod(val, &endptr);
332 if (time && endptr[0]) {
333 if (endptr[0] == 's')
335 else if (endptr[0] == 'm')
337 else if (endptr[0] == 'h')
339 else if (endptr[0] == 'd')
341 else if (endptr[0] == 'w')
342 time *= 7 * 24 * 3600;
348 iface->dhcpv4_leasetime = time;
351 if ((c = tb[IFACE_ATTR_START])) {
352 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
355 iface->dhcpv4 = RELAYD_SERVER;
358 if ((c = tb[IFACE_ATTR_LIMIT]))
359 iface->dhcpv4_end.s_addr = htonl(
360 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
362 if ((c = tb[IFACE_ATTR_MASTER]))
363 iface->master = blobmsg_get_bool(c);
365 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
366 struct blob_attr *cur;
369 blobmsg_for_each_attr(cur, c, rem) {
370 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
373 iface->upstream = realloc(iface->upstream,
374 iface->upstream_len + blobmsg_data_len(cur));
375 if (!iface->upstream)
378 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
379 iface->upstream_len += blobmsg_data_len(cur);
384 if ((c = tb[IFACE_ATTR_RA])) {
385 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
391 if ((c = tb[IFACE_ATTR_DHCPV4])) {
392 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
393 iface->dhcpv4 = mode;
398 if ((c = tb[IFACE_ATTR_DHCPV6])) {
399 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
400 iface->dhcpv6 = mode;
405 if ((c = tb[IFACE_ATTR_NDP])) {
406 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
412 if ((c = tb[IFACE_ATTR_DNS])) {
413 struct blob_attr *cur;
416 iface->always_rewrite_dns = true;
417 blobmsg_for_each_attr(cur, c, rem) {
418 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
421 struct in_addr addr4;
422 struct in6_addr addr6;
423 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
424 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
425 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
426 if (!iface->dhcpv4_dns)
429 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
430 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
431 iface->dns = realloc(iface->dns,
432 (++iface->dns_cnt) * sizeof(*iface->dns));
436 iface->dns[iface->dns_cnt - 1] = addr6;
443 if ((c = tb[IFACE_ATTR_DOMAIN])) {
444 struct blob_attr *cur;
447 blobmsg_for_each_attr(cur, c, rem) {
448 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
452 char *domain = blobmsg_get_string(cur);
453 size_t domainlen = strlen(domain);
454 if (domainlen > 0 && domain[domainlen - 1] == '.')
455 domain[domainlen - 1] = 0;
457 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
462 iface->search = realloc(iface->search, iface->search_len + len);
466 memcpy(&iface->search[iface->search_len], buf, len);
467 iface->search_len += len;
471 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
472 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
473 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
476 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
477 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
478 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
479 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
482 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
483 iface->default_router = blobmsg_get_u32(c);
485 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
486 iface->managed = blobmsg_get_u32(c);
490 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
491 iface->ra_not_onlink = blobmsg_get_bool(c);
493 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
494 const char *prio = blobmsg_get_string(c);
496 if (!strcmp(prio, "high"))
497 iface->route_preference = 1;
498 else if (!strcmp(prio, "low"))
499 iface->route_preference = -1;
500 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
501 iface->route_preference = 0;
506 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
507 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
508 sizeof(iface->dhcpv6_pd_manager) - 1);
510 if ((c = tb[IFACE_ATTR_PD_CER]) &&
511 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
514 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
515 iface->learn_routes = blobmsg_get_bool(c);
517 iface->learn_routes = true;
519 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
520 iface->external = blobmsg_get_bool(c);
522 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
523 struct blob_attr *cur;
526 blobmsg_for_each_attr(cur, c, rem) {
527 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
530 int len = blobmsg_data_len(cur);
531 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
532 if (!iface->static_ndp)
535 if (iface->static_ndp_len)
536 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
538 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
539 iface->static_ndp_len += len;
546 close_interface(iface);
550 static int set_interface(struct uci_section *s)
552 blob_buf_init(&b, 0);
553 uci_to_blob(&b, s, &interface_attr_list);
554 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
558 void odhcpd_reload(void)
560 struct uci_context *uci = uci_alloc_context();
561 while (!list_empty(&leases)) {
562 struct lease *l = list_first_entry(&leases, struct lease, head);
568 struct interface *master = NULL, *i, *n;
573 list_for_each_entry(i, &interfaces, head)
576 struct uci_package *dhcp = NULL;
577 if (!uci_load(uci, "dhcp", &dhcp)) {
578 struct uci_element *e;
579 uci_foreach_element(&dhcp->sections, e) {
580 struct uci_section *s = uci_to_section(e);
581 if (!strcmp(s->type, "host"))
583 else if (!strcmp(s->type, "odhcpd"))
587 uci_foreach_element(&dhcp->sections, e) {
588 struct uci_section *s = uci_to_section(e);
589 if (!strcmp(s->type, "dhcp"))
596 ubus_apply_network();
599 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
602 list_for_each_entry(i, &interfaces, head) {
606 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
607 any_dhcpv6_slave = true;
609 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
612 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
613 any_ndp_slave = true;
616 // Evaluate hybrid mode for master
617 list_for_each_entry(i, &interfaces, head) {
621 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
623 if (!ubus_has_prefix(i->name, i->ifname))
624 hybrid_mode = RELAYD_RELAY;
627 if (i->dhcpv6 == RELAYD_HYBRID)
628 i->dhcpv6 = hybrid_mode;
630 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
631 i->dhcpv6 = RELAYD_DISABLED;
633 if (i->ra == RELAYD_HYBRID)
636 if (i->ra == RELAYD_RELAY && !any_ra_slave)
637 i->ra = RELAYD_DISABLED;
639 if (i->ndp == RELAYD_HYBRID)
640 i->ndp = hybrid_mode;
642 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
643 i->ndp = RELAYD_DISABLED;
645 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
650 list_for_each_entry_safe(i, n, &interfaces, head) {
652 // Resolve hybrid mode
653 if (i->dhcpv6 == RELAYD_HYBRID)
654 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
655 RELAYD_RELAY : RELAYD_SERVER;
657 if (i->ra == RELAYD_HYBRID)
658 i->ra = (master && master->ra == RELAYD_RELAY) ?
659 RELAYD_RELAY : RELAYD_SERVER;
661 if (i->ndp == RELAYD_HYBRID)
662 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
663 RELAYD_RELAY : RELAYD_DISABLED;
665 setup_router_interface(i, true);
666 setup_dhcpv6_interface(i, true);
667 setup_ndp_interface(i, true);
668 setup_dhcpv4_interface(i, true);
674 uci_unload(uci, dhcp);
675 uci_free_context(uci);
679 static void handle_signal(int signal)
682 if (signal == SIGHUP)
683 write(reload_pipe[1], b, sizeof(b));
690 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
693 read(u->fd, b, sizeof(b));
697 static struct uloop_fd reload_fd = { .cb = reload_cb };
699 void odhcpd_run(void)
701 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
702 reload_fd.fd = reload_pipe[0];
703 uloop_fd_add(&reload_fd, ULOOP_READ);
705 signal(SIGTERM, handle_signal);
706 signal(SIGINT, handle_signal);
707 signal(SIGHUP, handle_signal);