15 static struct blob_buf b;
16 static int reload_pipe[2];
17 struct list_head leases = LIST_HEAD_INIT(leases);
18 struct list_head interfaces = LIST_HEAD_INIT(interfaces);
19 struct config config = {false, NULL, NULL};
25 IFACE_ATTR_DYNAMICDHCP,
39 IFACE_ATTR_FILTER_CLASS,
40 IFACE_ATTR_DHCPV6_RAW,
41 IFACE_ATTR_RA_DEFAULT,
42 IFACE_ATTR_RA_MANAGEMENT,
43 IFACE_ATTR_RA_OFFLINK,
44 IFACE_ATTR_RA_PREFERENCE,
45 IFACE_ATTR_RA_ADVROUTER,
46 IFACE_ATTR_RA_MAXINTERVAL,
47 IFACE_ATTR_PD_MANAGER,
49 IFACE_ATTR_NDPROXY_ROUTING,
50 IFACE_ATTR_NDPROXY_SLAVE,
54 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
55 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
56 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
57 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
58 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
59 [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
60 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
61 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
62 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
63 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
64 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
65 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
66 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
67 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
68 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
69 [IFACE_ATTR_ROUTER] = { .name = "router", .type = BLOBMSG_TYPE_ARRAY },
70 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
71 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
72 [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
73 [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
74 [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
75 [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
76 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
77 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
78 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
79 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
80 [IFACE_ATTR_RA_ADVROUTER] = { .name = "ra_advrouter", .type = BLOBMSG_TYPE_BOOL },
81 [IFACE_ATTR_RA_MAXINTERVAL] = { .name = "ra_maxinterval", .type = BLOBMSG_TYPE_INT32 },
82 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
83 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
86 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
87 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
88 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
89 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
92 const struct uci_blob_param_list interface_attr_list = {
93 .n_params = IFACE_ATTR_MAX,
94 .params = iface_attrs,
95 .info = iface_attr_info,
103 LEASE_ATTR_LEASETIME,
108 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
109 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
110 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
111 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
112 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
113 [LEASE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
114 [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,
123 ODHCPD_ATTR_MAINDHCP,
124 ODHCPD_ATTR_LEASEFILE,
125 ODHCPD_ATTR_LEASETRIGGER,
129 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
130 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
131 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
132 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
135 const struct uci_blob_param_list odhcpd_attr_list = {
136 .n_params = ODHCPD_ATTR_MAX,
137 .params = odhcpd_attrs,
140 static int mkdir_p(char *dir, mode_t mask)
142 char *l = strrchr(dir, '/');
150 if (mkdir_p(dir, mask))
155 ret = mkdir(dir, mask);
156 if (ret && errno == EEXIST)
160 syslog(LOG_ERR, "mkdir(%s, %d) failed: %s\n", dir, mask, strerror(errno));
165 static struct interface* get_interface(const char *name)
168 list_for_each_entry(c, &interfaces, head)
169 if (!strcmp(c->name, name))
174 static void clean_interface(struct interface *iface)
178 free(iface->upstream);
179 free(iface->dhcpv4_router);
180 free(iface->dhcpv4_dns);
181 free(iface->dhcpv6_raw);
182 free(iface->filter_class);
183 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
186 static void close_interface(struct interface *iface)
188 if (iface->head.next)
189 list_del(&iface->head);
191 setup_router_interface(iface, false);
192 setup_dhcpv6_interface(iface, false);
193 setup_ndp_interface(iface, false);
194 setup_dhcpv4_interface(iface, false);
196 clean_interface(iface);
200 static int parse_mode(const char *mode)
202 if (!strcmp(mode, "disabled"))
203 return RELAYD_DISABLED;
204 else if (!strcmp(mode, "server"))
205 return RELAYD_SERVER;
206 else if (!strcmp(mode, "relay"))
208 else if (!strcmp(mode, "hybrid"))
209 return RELAYD_HYBRID;
214 static void set_config(struct uci_section *s)
216 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
218 blob_buf_init(&b, 0);
219 uci_to_blob(&b, s, &odhcpd_attr_list);
220 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
222 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
223 config.legacy = blobmsg_get_bool(c);
225 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
226 free(config.dhcp_statefile);
227 config.dhcp_statefile = strdup(blobmsg_get_string(c));
230 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
231 free(config.dhcp_cb);
232 config.dhcp_cb = strdup(blobmsg_get_string(c));
236 static double parse_leasetime(struct blob_attr *c) {
237 char *val = blobmsg_get_string(c), *endptr = NULL;
238 double time = strcmp(val, "infinite") ? strtod(val, &endptr) : UINT32_MAX;
240 if (time && endptr && endptr[0]) {
241 if (endptr[0] == 's')
243 else if (endptr[0] == 'm')
245 else if (endptr[0] == 'h')
247 else if (endptr[0] == 'd')
249 else if (endptr[0] == 'w')
250 time *= 7 * 24 * 3600;
264 static int set_lease(struct uci_section *s)
266 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
268 blob_buf_init(&b, 0);
269 uci_to_blob(&b, s, &lease_attr_list);
270 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
273 if ((c = tb[LEASE_ATTR_NAME]))
274 hostlen = blobmsg_data_len(c);
276 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
281 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
283 if ((c = tb[LEASE_ATTR_IP]))
284 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
287 if ((c = tb[LEASE_ATTR_MAC]))
288 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
291 if ((c = tb[LEASE_ATTR_DUID])) {
292 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
293 lease->duid = malloc(duidlen);
297 ssize_t len = odhcpd_unhexlify(lease->duid,
298 duidlen, blobmsg_get_string(c));
303 lease->duid_len = len;
306 if ((c = tb[LEASE_ATTR_HOSTID])) {
308 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
313 if ((c = tb[LEASE_ATTR_LEASETIME])) {
314 double time = parse_leasetime(c);
319 lease->dhcpv4_leasetime = time;
322 list_add(&lease->head, &leases);
333 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
335 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
336 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
338 if (tb[IFACE_ATTR_INTERFACE])
339 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
344 struct interface *iface = get_interface(name);
346 iface = calloc(1, sizeof(*iface));
350 strncpy(iface->name, name, sizeof(iface->name) - 1);
352 /* Default settings */
354 iface->learn_routes = true;
356 list_add(&iface->head, &interfaces);
360 const char *ifname = NULL;
362 if ((c = tb[IFACE_ATTR_IFNAME]))
363 ifname = blobmsg_get_string(c);
364 else if ((c = tb[IFACE_ATTR_NETWORKID]))
365 ifname = blobmsg_get_string(c);
369 if (overwrite || !iface->ifname[0])
370 ifname = ubus_get_ifname(name);
373 if (!iface->ifname[0] && !ifname)
377 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
379 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
384 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
385 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
387 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
388 iface->ignore = blobmsg_get_bool(c);
390 if ((c = tb[IFACE_ATTR_LEASETIME])) {
391 double time = parse_leasetime(c);
396 iface->dhcpv4_leasetime = time;
399 if ((c = tb[IFACE_ATTR_START])) {
400 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
403 iface->dhcpv4 = RELAYD_SERVER;
406 if ((c = tb[IFACE_ATTR_LIMIT]))
407 iface->dhcpv4_end.s_addr = htonl(
408 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
410 if ((c = tb[IFACE_ATTR_MASTER]))
411 iface->master = blobmsg_get_bool(c);
413 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
414 struct blob_attr *cur;
417 blobmsg_for_each_attr(cur, c, rem) {
418 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
421 iface->upstream = realloc(iface->upstream,
422 iface->upstream_len + blobmsg_data_len(cur));
423 if (!iface->upstream)
426 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
427 iface->upstream_len += blobmsg_data_len(cur);
432 if ((c = tb[IFACE_ATTR_RA])) {
433 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
439 if ((c = tb[IFACE_ATTR_DHCPV4])) {
440 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
441 iface->dhcpv4 = mode;
446 if ((c = tb[IFACE_ATTR_DHCPV6])) {
447 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
448 iface->dhcpv6 = mode;
453 if ((c = tb[IFACE_ATTR_NDP])) {
454 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
460 if ((c = tb[IFACE_ATTR_ROUTER])) {
461 struct blob_attr *cur;
464 blobmsg_for_each_attr(cur, c, rem) {
465 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
468 struct in_addr addr4;
469 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
470 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
471 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
472 if (!iface->dhcpv4_router)
475 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
481 if ((c = tb[IFACE_ATTR_DNS])) {
482 struct blob_attr *cur;
485 iface->always_rewrite_dns = true;
486 blobmsg_for_each_attr(cur, c, rem) {
487 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
490 struct in_addr addr4;
491 struct in6_addr addr6;
492 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
493 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
494 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
495 if (!iface->dhcpv4_dns)
498 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
499 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
500 iface->dns = realloc(iface->dns,
501 (++iface->dns_cnt) * sizeof(*iface->dns));
505 iface->dns[iface->dns_cnt - 1] = addr6;
511 if ((c = tb[IFACE_ATTR_DOMAIN])) {
512 struct blob_attr *cur;
515 blobmsg_for_each_attr(cur, c, rem) {
516 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
520 char *domain = blobmsg_get_string(cur);
521 size_t domainlen = strlen(domain);
522 if (domainlen > 0 && domain[domainlen - 1] == '.')
523 domain[domainlen - 1] = 0;
525 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
529 iface->search = realloc(iface->search, iface->search_len + len);
533 memcpy(&iface->search[iface->search_len], buf, len);
534 iface->search_len += len;
538 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
539 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
540 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
543 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
544 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
545 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
546 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
549 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
550 iface->default_router = blobmsg_get_u32(c);
552 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
553 iface->managed = blobmsg_get_u32(c);
555 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
556 iface->ra_not_onlink = blobmsg_get_bool(c);
558 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
559 iface->ra_advrouter = blobmsg_get_bool(c);
561 if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
562 iface->ra_maxinterval = blobmsg_get_u32(c);
564 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
565 const char *prio = blobmsg_get_string(c);
567 if (!strcmp(prio, "high"))
568 iface->route_preference = 1;
569 else if (!strcmp(prio, "low"))
570 iface->route_preference = -1;
571 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
572 iface->route_preference = 0;
577 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
578 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
579 sizeof(iface->dhcpv6_pd_manager) - 1);
581 if ((c = tb[IFACE_ATTR_PD_CER]) &&
582 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
585 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
586 iface->learn_routes = blobmsg_get_bool(c);
588 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
589 iface->external = blobmsg_get_bool(c);
594 close_interface(iface);
598 static int set_interface(struct uci_section *s)
600 blob_buf_init(&b, 0);
601 uci_to_blob(&b, s, &interface_attr_list);
603 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
606 void odhcpd_reload(void)
608 struct uci_context *uci = uci_alloc_context();
610 while (!list_empty(&leases)) {
611 struct lease *l = list_first_entry(&leases, struct lease, head);
617 struct interface *master = NULL, *i, *n;
622 list_for_each_entry(i, &interfaces, head)
625 struct uci_package *dhcp = NULL;
626 if (!uci_load(uci, "dhcp", &dhcp)) {
627 struct uci_element *e;
628 uci_foreach_element(&dhcp->sections, e) {
629 struct uci_section *s = uci_to_section(e);
630 if (!strcmp(s->type, "host"))
632 else if (!strcmp(s->type, "odhcpd"))
636 uci_foreach_element(&dhcp->sections, e) {
637 struct uci_section *s = uci_to_section(e);
638 if (!strcmp(s->type, "dhcp"))
643 if (config.dhcp_statefile) {
644 char *path = strdup(config.dhcp_statefile);
646 mkdir_p(dirname(path), 0755);
651 ubus_apply_network();
654 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
657 list_for_each_entry(i, &interfaces, head) {
661 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
662 any_dhcpv6_slave = true;
664 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
667 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
668 any_ndp_slave = true;
671 /* Evaluate hybrid mode for master */
672 list_for_each_entry(i, &interfaces, head) {
676 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
678 if (!ubus_has_prefix(i->name, i->ifname))
679 hybrid_mode = RELAYD_RELAY;
682 if (i->dhcpv6 == RELAYD_HYBRID)
683 i->dhcpv6 = hybrid_mode;
685 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
686 i->dhcpv6 = RELAYD_DISABLED;
688 if (i->ra == RELAYD_HYBRID)
691 if (i->ra == RELAYD_RELAY && !any_ra_slave)
692 i->ra = RELAYD_DISABLED;
694 if (i->ndp == RELAYD_HYBRID)
695 i->ndp = hybrid_mode;
697 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
698 i->ndp = RELAYD_DISABLED;
700 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
705 list_for_each_entry_safe(i, n, &interfaces, head) {
707 /* Resolve hybrid mode */
708 if (i->dhcpv6 == RELAYD_HYBRID)
709 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
710 RELAYD_RELAY : RELAYD_SERVER;
712 if (i->ra == RELAYD_HYBRID)
713 i->ra = (master && master->ra == RELAYD_RELAY) ?
714 RELAYD_RELAY : RELAYD_SERVER;
716 if (i->ndp == RELAYD_HYBRID)
717 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
718 RELAYD_RELAY : RELAYD_DISABLED;
720 setup_router_interface(i, true);
721 setup_dhcpv6_interface(i, true);
722 setup_ndp_interface(i, true);
723 setup_dhcpv4_interface(i, true);
729 uci_unload(uci, dhcp);
730 uci_free_context(uci);
733 static void handle_signal(int signal)
737 if (signal == SIGHUP) {
738 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
743 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
746 if (read(u->fd, b, sizeof(b)) < 0) {}
751 static struct uloop_fd reload_fd = { .cb = reload_cb };
753 void odhcpd_run(void)
755 if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
757 reload_fd.fd = reload_pipe[0];
758 uloop_fd_add(&reload_fd, ULOOP_READ);
760 signal(SIGTERM, handle_signal);
761 signal(SIGINT, handle_signal);
762 signal(SIGHUP, handle_signal);
772 while (!list_empty(&interfaces))
773 close_interface(list_first_entry(&interfaces, struct interface, head));