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]))
259 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
260 blobmsg_get_string(c)) < 0)
263 list_add(&lease->head, &leases);
275 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
277 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
278 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
280 if (tb[IFACE_ATTR_INTERFACE])
281 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
286 struct interface *iface = get_interface(name);
288 iface = calloc(1, sizeof(*iface));
292 strncpy(iface->name, name, sizeof(iface->name) - 1);
293 list_add(&iface->head, &interfaces);
297 const char *ifname = NULL;
299 if (overwrite || !iface->ifname[0])
300 ifname = ubus_get_ifname(name);
304 if ((c = tb[IFACE_ATTR_IFNAME]))
305 ifname = blobmsg_get_string(c);
306 else if ((c = tb[IFACE_ATTR_NETWORKID]))
307 ifname = blobmsg_get_string(c);
310 if (!iface->ifname[0] && !ifname)
314 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
316 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
321 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
322 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
324 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
325 iface->ignore = blobmsg_get_bool(c);
327 if ((c = tb[IFACE_ATTR_LEASETIME])) {
328 char *val = blobmsg_get_string(c), *endptr;
329 double time = strtod(val, &endptr);
330 if (time && endptr[0]) {
331 if (endptr[0] == 's')
333 else if (endptr[0] == 'm')
335 else if (endptr[0] == 'h')
337 else if (endptr[0] == 'd')
339 else if (endptr[0] == 'w')
340 time *= 7 * 24 * 3600;
346 iface->dhcpv4_leasetime = time;
349 if ((c = tb[IFACE_ATTR_START])) {
350 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
353 iface->dhcpv4 = RELAYD_SERVER;
356 if ((c = tb[IFACE_ATTR_LIMIT]))
357 iface->dhcpv4_end.s_addr = htonl(
358 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
360 if ((c = tb[IFACE_ATTR_MASTER]))
361 iface->master = blobmsg_get_bool(c);
363 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
364 struct blob_attr *cur;
367 blobmsg_for_each_attr(cur, c, rem) {
368 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
371 iface->upstream = realloc(iface->upstream,
372 iface->upstream_len + blobmsg_data_len(cur));
373 if (!iface->upstream)
376 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
377 iface->upstream_len += blobmsg_data_len(cur);
382 if ((c = tb[IFACE_ATTR_RA])) {
383 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
389 if ((c = tb[IFACE_ATTR_DHCPV4])) {
390 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
391 iface->dhcpv4 = mode;
396 if ((c = tb[IFACE_ATTR_DHCPV6])) {
397 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
398 iface->dhcpv6 = mode;
403 if ((c = tb[IFACE_ATTR_NDP])) {
404 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
410 if ((c = tb[IFACE_ATTR_DNS])) {
411 struct blob_attr *cur;
414 iface->always_rewrite_dns = true;
415 blobmsg_for_each_attr(cur, c, rem) {
416 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
419 struct in_addr addr4;
420 struct in6_addr addr6;
421 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
422 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
423 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
424 if (!iface->dhcpv4_dns)
427 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
428 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
429 iface->dns = realloc(iface->dns,
430 (++iface->dns_cnt) * sizeof(*iface->dns));
434 iface->dns[iface->dns_cnt - 1] = addr6;
441 if ((c = tb[IFACE_ATTR_DOMAIN])) {
442 struct blob_attr *cur;
445 blobmsg_for_each_attr(cur, c, rem) {
446 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
450 char *domain = blobmsg_get_string(cur);
451 size_t domainlen = strlen(domain);
452 if (domainlen > 0 && domain[domainlen - 1] == '.')
453 domain[domainlen - 1] = 0;
455 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
460 iface->search = realloc(iface->search, iface->search_len + len);
464 memcpy(&iface->search[iface->search_len], buf, len);
465 iface->search_len += len;
469 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
470 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
471 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
474 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
475 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
476 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
477 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
480 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
481 iface->default_router = blobmsg_get_u32(c);
483 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
484 iface->managed = blobmsg_get_u32(c);
488 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
489 iface->ra_not_onlink = blobmsg_get_bool(c);
491 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
492 const char *prio = blobmsg_get_string(c);
494 if (!strcmp(prio, "high"))
495 iface->route_preference = 1;
496 else if (!strcmp(prio, "low"))
497 iface->route_preference = -1;
498 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
499 iface->route_preference = 0;
504 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
505 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
506 sizeof(iface->dhcpv6_pd_manager) - 1);
508 if ((c = tb[IFACE_ATTR_PD_CER]) &&
509 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
512 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
513 iface->learn_routes = blobmsg_get_bool(c);
515 iface->learn_routes = true;
517 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
518 iface->external = blobmsg_get_bool(c);
520 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
521 struct blob_attr *cur;
524 blobmsg_for_each_attr(cur, c, rem) {
525 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
528 int len = blobmsg_data_len(cur);
529 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
530 if (!iface->static_ndp)
533 if (iface->static_ndp_len)
534 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
536 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
537 iface->static_ndp_len += len;
544 close_interface(iface);
548 static int set_interface(struct uci_section *s)
550 blob_buf_init(&b, 0);
551 uci_to_blob(&b, s, &interface_attr_list);
552 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
556 void odhcpd_reload(void)
558 struct uci_context *uci = uci_alloc_context();
559 while (!list_empty(&leases)) {
560 struct lease *l = list_first_entry(&leases, struct lease, head);
566 struct interface *master = NULL, *i, *n;
571 list_for_each_entry(i, &interfaces, head)
574 struct uci_package *dhcp = NULL;
575 if (!uci_load(uci, "dhcp", &dhcp)) {
576 struct uci_element *e;
577 uci_foreach_element(&dhcp->sections, e) {
578 struct uci_section *s = uci_to_section(e);
579 if (!strcmp(s->type, "host"))
581 else if (!strcmp(s->type, "odhcpd"))
585 uci_foreach_element(&dhcp->sections, e) {
586 struct uci_section *s = uci_to_section(e);
587 if (!strcmp(s->type, "dhcp"))
594 ubus_apply_network();
597 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
600 list_for_each_entry(i, &interfaces, head) {
604 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
605 any_dhcpv6_slave = true;
607 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
610 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
611 any_ndp_slave = true;
614 // Evaluate hybrid mode for master
615 list_for_each_entry(i, &interfaces, head) {
619 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
621 if (!ubus_has_prefix(i->name, i->ifname))
622 hybrid_mode = RELAYD_RELAY;
625 if (i->dhcpv6 == RELAYD_HYBRID)
626 i->dhcpv6 = hybrid_mode;
628 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
629 i->dhcpv6 = RELAYD_DISABLED;
631 if (i->ra == RELAYD_HYBRID)
634 if (i->ra == RELAYD_RELAY && !any_ra_slave)
635 i->ra = RELAYD_DISABLED;
637 if (i->ndp == RELAYD_HYBRID)
638 i->ndp = hybrid_mode;
640 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
641 i->ndp = RELAYD_DISABLED;
643 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
648 list_for_each_entry_safe(i, n, &interfaces, head) {
650 // Resolve hybrid mode
651 if (i->dhcpv6 == RELAYD_HYBRID)
652 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
653 RELAYD_RELAY : RELAYD_SERVER;
655 if (i->ra == RELAYD_HYBRID)
656 i->ra = (master && master->ra == RELAYD_RELAY) ?
657 RELAYD_RELAY : RELAYD_SERVER;
659 if (i->ndp == RELAYD_HYBRID)
660 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
661 RELAYD_RELAY : RELAYD_DISABLED;
663 setup_router_interface(i, true);
664 setup_dhcpv6_interface(i, true);
665 setup_ndp_interface(i, true);
666 setup_dhcpv4_interface(i, true);
672 uci_unload(uci, dhcp);
673 uci_free_context(uci);
677 static void handle_signal(int signal)
680 if (signal == SIGHUP)
681 write(reload_pipe[1], b, sizeof(b));
688 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
691 read(u->fd, b, sizeof(b));
695 static struct uloop_fd reload_fd = { .cb = reload_cb };
697 void odhcpd_run(void)
699 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
700 reload_fd.fd = reload_pipe[0];
701 uloop_fd_add(&reload_fd, ULOOP_READ);
703 signal(SIGTERM, handle_signal);
704 signal(SIGINT, handle_signal);
705 signal(SIGHUP, handle_signal);