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_RA_DEFAULT,
36 IFACE_ATTR_RA_MANAGEMENT,
37 IFACE_ATTR_RA_OFFLINK,
38 IFACE_ATTR_RA_PREFERENCE,
39 IFACE_ATTR_NDPROXY_ROUTING,
40 IFACE_ATTR_NDPROXY_SLAVE,
41 IFACE_ATTR_NDPROXY_STATIC,
45 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
46 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
47 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
48 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
49 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
50 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
51 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
52 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
53 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
54 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
55 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
56 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
57 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
58 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
59 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
60 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
61 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
62 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
63 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
64 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
65 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
66 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
67 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
68 [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
71 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
72 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
73 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
74 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
75 [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
78 const struct uci_blob_param_list interface_attr_list = {
79 .n_params = IFACE_ATTR_MAX,
80 .params = iface_attrs,
81 .info = iface_attr_info,
95 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
96 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
97 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
98 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
99 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
100 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
104 const struct uci_blob_param_list lease_attr_list = {
105 .n_params = LEASE_ATTR_MAX,
106 .params = lease_attrs,
111 ODHCPD_ATTR_MAINDHCP,
112 ODHCPD_ATTR_LEASEFILE,
113 ODHCPD_ATTR_LEASETRIGGER,
118 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
119 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
120 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
121 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
125 const struct uci_blob_param_list odhcpd_attr_list = {
126 .n_params = ODHCPD_ATTR_MAX,
127 .params = odhcpd_attrs,
131 static struct interface* get_interface(const char *name)
134 list_for_each_entry(c, &interfaces, head)
135 if (!strcmp(c->name, name))
141 static void clean_interface(struct interface *iface)
145 free(iface->upstream);
146 free(iface->static_ndp);
147 free(iface->dhcpv4_dns);
148 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
152 static void close_interface(struct interface *iface)
154 if (iface->head.next)
155 list_del(&iface->head);
157 setup_router_interface(iface, false);
158 setup_dhcpv6_interface(iface, false);
159 setup_ndp_interface(iface, false);
160 setup_dhcpv4_interface(iface, false);
162 clean_interface(iface);
167 static int parse_mode(const char *mode)
169 if (!strcmp(mode, "disabled")) {
170 return RELAYD_DISABLED;
171 } else if (!strcmp(mode, "server")) {
172 return RELAYD_SERVER;
173 } else if (!strcmp(mode, "relay")) {
175 } else if (!strcmp(mode, "hybrid")) {
176 return RELAYD_HYBRID;
183 static void set_config(struct uci_section *s)
185 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
187 blob_buf_init(&b, 0);
188 uci_to_blob(&b, s, &odhcpd_attr_list);
189 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
191 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
192 config.legacy = blobmsg_get_bool(c);
194 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
195 free(config.dhcp_statefile);
196 config.dhcp_statefile = strdup(blobmsg_get_string(c));
199 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
200 free(config.dhcp_cb);
201 config.dhcp_cb = strdup(blobmsg_get_string(c));
206 static int set_lease(struct uci_section *s)
208 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
210 blob_buf_init(&b, 0);
211 uci_to_blob(&b, s, &lease_attr_list);
212 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
215 if ((c = tb[LEASE_ATTR_NAME]))
216 hostlen = blobmsg_data_len(c);
218 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
223 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
225 if ((c = tb[LEASE_ATTR_IP]))
226 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
229 if ((c = tb[LEASE_ATTR_MAC]))
230 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
233 if ((c = tb[LEASE_ATTR_DUID])) {
234 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
235 lease->duid = malloc(duidlen);
239 ssize_t len = odhcpd_unhexlify(lease->duid,
240 duidlen, blobmsg_get_string(c));
245 lease->duid_len = len;
248 if ((c = tb[LEASE_ATTR_HOSTID]))
249 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
250 blobmsg_get_string(c)) < 0)
253 list_add(&lease->head, &leases);
265 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
267 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
268 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
270 if (tb[IFACE_ATTR_INTERFACE])
271 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
276 struct interface *iface = get_interface(name);
278 iface = calloc(1, sizeof(*iface));
282 strncpy(iface->name, name, sizeof(iface->name) - 1);
283 list_add(&iface->head, &interfaces);
286 const char *ifname = NULL;
288 if (overwrite || !iface->ifname[0])
289 ifname = ubus_get_ifname(name);
293 if ((c = tb[IFACE_ATTR_IFNAME]))
294 ifname = blobmsg_get_string(c);
295 else if ((c = tb[IFACE_ATTR_NETWORKID]))
296 ifname = blobmsg_get_string(c);
299 if (!iface->ifname[0] && !ifname)
303 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
305 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
310 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
311 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
313 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
314 iface->ignore = blobmsg_get_bool(c);
316 if ((c = tb[IFACE_ATTR_LEASETIME])) {
317 char *val = blobmsg_get_string(c), *endptr;
318 double time = strtod(val, &endptr);
319 if (time && endptr[0]) {
320 if (endptr[0] == 's')
322 else if (endptr[0] == 'm')
324 else if (endptr[0] == 'h')
326 else if (endptr[0] == 'd')
328 else if (endptr[0] == 'w')
329 time *= 7 * 24 * 3600;
335 iface->dhcpv4_leasetime = time;
338 if ((c = tb[IFACE_ATTR_START])) {
339 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
342 iface->dhcpv4 = RELAYD_SERVER;
345 if ((c = tb[IFACE_ATTR_LIMIT]))
346 iface->dhcpv4_end.s_addr = htonl(
347 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
349 if ((c = tb[IFACE_ATTR_MASTER]))
350 iface->master = blobmsg_get_bool(c);
352 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
353 struct blob_attr *cur;
356 blobmsg_for_each_attr(cur, c, rem) {
357 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
360 iface->upstream = realloc(iface->upstream,
361 iface->upstream_len + blobmsg_data_len(cur));
362 if (!iface->upstream)
365 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
366 iface->upstream_len += blobmsg_data_len(cur);
371 if ((c = tb[IFACE_ATTR_RA])) {
372 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
378 if ((c = tb[IFACE_ATTR_DHCPV4])) {
379 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
380 iface->dhcpv4 = mode;
385 if ((c = tb[IFACE_ATTR_DHCPV6])) {
386 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
387 iface->dhcpv6 = mode;
392 if ((c = tb[IFACE_ATTR_NDP])) {
393 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
399 if ((c = tb[IFACE_ATTR_DNS])) {
400 struct blob_attr *cur;
403 iface->always_rewrite_dns = true;
404 blobmsg_for_each_attr(cur, c, rem) {
405 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
408 struct in_addr addr4;
409 struct in6_addr addr6;
410 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
411 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
412 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
413 if (!iface->dhcpv4_dns)
416 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
417 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
418 iface->dns = realloc(iface->dns,
419 (++iface->dns_cnt) * sizeof(*iface->dns));
423 iface->dns[iface->dns_cnt - 1] = addr6;
430 if ((c = tb[IFACE_ATTR_DOMAIN])) {
431 struct blob_attr *cur;
434 blobmsg_for_each_attr(cur, c, rem) {
435 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
439 int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
443 iface->search = realloc(iface->search, iface->search_len + len);
447 memcpy(&iface->search[iface->search_len], buf, len);
448 iface->search_len += len;
452 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
453 iface->default_router = blobmsg_get_u32(c);
455 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
456 iface->managed = blobmsg_get_u32(c);
458 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
459 iface->ra_not_onlink = blobmsg_get_bool(c);
461 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
462 const char *prio = blobmsg_get_string(c);
464 if (!strcmp(prio, "high"))
465 iface->route_preference = 1;
466 else if (!strcmp(prio, "low"))
467 iface->route_preference = -1;
468 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
469 iface->route_preference = 0;
474 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
475 iface->learn_routes = blobmsg_get_bool(c);
477 iface->learn_routes = true;
479 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
480 iface->external = blobmsg_get_bool(c);
482 if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
483 struct blob_attr *cur;
486 blobmsg_for_each_attr(cur, c, rem) {
487 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
490 int len = blobmsg_data_len(cur);
491 iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
492 if (!iface->static_ndp)
495 memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
496 iface->static_ndp_len += len;
503 close_interface(iface);
507 static int set_interface(struct uci_section *s)
509 blob_buf_init(&b, 0);
510 uci_to_blob(&b, s, &interface_attr_list);
511 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
515 void odhcpd_reload(void)
517 struct uci_context *uci = uci_alloc_context();
519 list_for_each_entry(l, &leases, head) {
525 struct interface *master = NULL, *i, *n;
530 list_for_each_entry(i, &interfaces, head)
533 struct uci_package *dhcp = NULL;
534 if (!uci_load(uci, "dhcp", &dhcp)) {
535 struct uci_element *e;
536 uci_foreach_element(&dhcp->sections, e) {
537 struct uci_section *s = uci_to_section(e);
538 if (!strcmp(s->type, "host"))
540 else if (!strcmp(s->type, "odhcpd"))
544 uci_foreach_element(&dhcp->sections, e) {
545 struct uci_section *s = uci_to_section(e);
546 if (!strcmp(s->type, "dhcp"))
553 ubus_apply_network();
556 // Evaluate hybrid mode for master
557 list_for_each_entry(i, &interfaces, head) {
561 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
563 if (!ubus_has_prefix(i->name, i->ifname))
564 hybrid_mode = RELAYD_RELAY;
567 if (i->dhcpv6 == RELAYD_HYBRID)
568 i->dhcpv6 = hybrid_mode;
570 if (i->ra == RELAYD_HYBRID)
573 if (i->ndp == RELAYD_HYBRID)
574 i->ndp = hybrid_mode;
576 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
581 list_for_each_entry_safe(i, n, &interfaces, head) {
583 // Resolve hybrid mode
584 if (i->dhcpv6 == RELAYD_HYBRID)
585 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
586 RELAYD_RELAY : RELAYD_SERVER;
588 if (i->ra == RELAYD_HYBRID)
589 i->ra = (master && master->ra == RELAYD_RELAY) ?
590 RELAYD_RELAY : RELAYD_SERVER;
592 if (i->ndp == RELAYD_HYBRID)
593 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
594 RELAYD_RELAY : RELAYD_SERVER;
596 setup_router_interface(i, true);
597 setup_dhcpv6_interface(i, true);
598 setup_ndp_interface(i, true);
599 setup_dhcpv4_interface(i, true);
605 uci_unload(uci, dhcp);
606 uci_free_context(uci);
610 static void handle_signal(int signal)
613 if (signal == SIGHUP)
614 write(reload_pipe[1], b, sizeof(b));
621 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
624 read(u->fd, b, sizeof(b));
628 static struct uloop_fd reload_fd = { .cb = reload_cb };
630 void odhcpd_run(void)
632 pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
633 reload_fd.fd = reload_pipe[0];
634 uloop_fd_add(&reload_fd, ULOOP_READ);
636 signal(SIGTERM, handle_signal);
637 signal(SIGINT, handle_signal);
638 signal(SIGHUP, handle_signal);