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 void free_lease(struct lease *l)
174 static struct interface* get_interface(const char *name)
177 list_for_each_entry(c, &interfaces, head)
178 if (!strcmp(c->name, name))
183 static void set_interface_defaults(struct interface *iface)
186 iface->learn_routes = 1;
189 static void clean_interface(struct interface *iface)
193 free(iface->upstream);
194 free(iface->dhcpv4_router);
195 free(iface->dhcpv4_dns);
196 free(iface->dhcpv6_raw);
197 free(iface->filter_class);
198 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
199 set_interface_defaults(iface);
202 static void close_interface(struct interface *iface)
204 if (iface->head.next)
205 list_del(&iface->head);
207 setup_router_interface(iface, false);
208 setup_dhcpv6_interface(iface, false);
209 setup_ndp_interface(iface, false);
210 setup_dhcpv4_interface(iface, false);
212 clean_interface(iface);
216 static int parse_mode(const char *mode)
218 if (!strcmp(mode, "disabled"))
219 return RELAYD_DISABLED;
220 else if (!strcmp(mode, "server"))
221 return RELAYD_SERVER;
222 else if (!strcmp(mode, "relay"))
224 else if (!strcmp(mode, "hybrid"))
225 return RELAYD_HYBRID;
230 static void set_config(struct uci_section *s)
232 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
234 blob_buf_init(&b, 0);
235 uci_to_blob(&b, s, &odhcpd_attr_list);
236 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
238 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
239 config.legacy = blobmsg_get_bool(c);
241 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
242 free(config.dhcp_statefile);
243 config.dhcp_statefile = strdup(blobmsg_get_string(c));
246 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
247 free(config.dhcp_cb);
248 config.dhcp_cb = strdup(blobmsg_get_string(c));
252 static double parse_leasetime(struct blob_attr *c) {
253 char *val = blobmsg_get_string(c), *endptr = NULL;
254 double time = strcmp(val, "infinite") ? strtod(val, &endptr) : UINT32_MAX;
256 if (time && endptr && endptr[0]) {
257 if (endptr[0] == 's')
259 else if (endptr[0] == 'm')
261 else if (endptr[0] == 'h')
263 else if (endptr[0] == 'd')
265 else if (endptr[0] == 'w')
266 time *= 7 * 24 * 3600;
280 static int set_lease(struct uci_section *s)
282 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
284 blob_buf_init(&b, 0);
285 uci_to_blob(&b, s, &lease_attr_list);
286 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
289 if ((c = tb[LEASE_ATTR_NAME]))
290 hostlen = blobmsg_data_len(c);
292 struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
297 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
299 if ((c = tb[LEASE_ATTR_IP]))
300 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
303 if ((c = tb[LEASE_ATTR_MAC]))
304 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
307 if ((c = tb[LEASE_ATTR_DUID])) {
308 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
309 lease->duid = malloc(duidlen);
313 ssize_t len = odhcpd_unhexlify(lease->duid,
314 duidlen, blobmsg_get_string(c));
319 lease->duid_len = len;
322 if ((c = tb[LEASE_ATTR_HOSTID])) {
324 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
329 if ((c = tb[LEASE_ATTR_LEASETIME])) {
330 double time = parse_leasetime(c);
335 lease->dhcpv4_leasetime = time;
338 list_add(&lease->head, &leases);
348 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
350 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
351 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
353 if (tb[IFACE_ATTR_INTERFACE])
354 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
359 struct interface *iface = get_interface(name);
361 iface = calloc(1, sizeof(*iface));
365 strncpy(iface->name, name, sizeof(iface->name) - 1);
367 set_interface_defaults(iface);
369 list_add(&iface->head, &interfaces);
373 const char *ifname = NULL;
375 if ((c = tb[IFACE_ATTR_IFNAME]))
376 ifname = blobmsg_get_string(c);
377 else if ((c = tb[IFACE_ATTR_NETWORKID]))
378 ifname = blobmsg_get_string(c);
382 if (overwrite || !iface->ifname[0])
383 ifname = ubus_get_ifname(name);
386 if (!iface->ifname[0] && !ifname)
390 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
392 if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
397 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
398 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
400 if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
401 iface->ignore = blobmsg_get_bool(c);
403 if ((c = tb[IFACE_ATTR_LEASETIME])) {
404 double time = parse_leasetime(c);
409 iface->dhcpv4_leasetime = time;
412 if ((c = tb[IFACE_ATTR_START])) {
413 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
416 iface->dhcpv4 = RELAYD_SERVER;
419 if ((c = tb[IFACE_ATTR_LIMIT]))
420 iface->dhcpv4_end.s_addr = htonl(
421 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
423 if ((c = tb[IFACE_ATTR_MASTER]))
424 iface->master = blobmsg_get_bool(c);
426 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
427 struct blob_attr *cur;
430 blobmsg_for_each_attr(cur, c, rem) {
431 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
434 iface->upstream = realloc(iface->upstream,
435 iface->upstream_len + blobmsg_data_len(cur));
436 if (!iface->upstream)
439 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
440 iface->upstream_len += blobmsg_data_len(cur);
445 if ((c = tb[IFACE_ATTR_RA])) {
446 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
452 if ((c = tb[IFACE_ATTR_DHCPV4])) {
453 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
454 iface->dhcpv4 = mode;
459 if ((c = tb[IFACE_ATTR_DHCPV6])) {
460 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
461 iface->dhcpv6 = mode;
466 if ((c = tb[IFACE_ATTR_NDP])) {
467 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
473 if ((c = tb[IFACE_ATTR_ROUTER])) {
474 struct blob_attr *cur;
477 blobmsg_for_each_attr(cur, c, rem) {
478 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
481 struct in_addr addr4;
482 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
483 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
484 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
485 if (!iface->dhcpv4_router)
488 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
494 if ((c = tb[IFACE_ATTR_DNS])) {
495 struct blob_attr *cur;
498 iface->always_rewrite_dns = true;
499 blobmsg_for_each_attr(cur, c, rem) {
500 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
503 struct in_addr addr4;
504 struct in6_addr addr6;
505 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
506 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
507 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
508 if (!iface->dhcpv4_dns)
511 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
512 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
513 iface->dns = realloc(iface->dns,
514 (++iface->dns_cnt) * sizeof(*iface->dns));
518 iface->dns[iface->dns_cnt - 1] = addr6;
524 if ((c = tb[IFACE_ATTR_DOMAIN])) {
525 struct blob_attr *cur;
528 blobmsg_for_each_attr(cur, c, rem) {
529 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
533 char *domain = blobmsg_get_string(cur);
534 size_t domainlen = strlen(domain);
535 if (domainlen > 0 && domain[domainlen - 1] == '.')
536 domain[domainlen - 1] = 0;
538 int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
542 iface->search = realloc(iface->search, iface->search_len + len);
546 memcpy(&iface->search[iface->search_len], buf, len);
547 iface->search_len += len;
551 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
552 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
553 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
556 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
557 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
558 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
559 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
562 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
563 iface->default_router = blobmsg_get_u32(c);
565 if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
566 iface->managed = blobmsg_get_u32(c);
568 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
569 iface->ra_not_onlink = blobmsg_get_bool(c);
571 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
572 iface->ra_advrouter = blobmsg_get_bool(c);
574 if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
575 iface->ra_maxinterval = blobmsg_get_u32(c);
577 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
578 const char *prio = blobmsg_get_string(c);
580 if (!strcmp(prio, "high"))
581 iface->route_preference = 1;
582 else if (!strcmp(prio, "low"))
583 iface->route_preference = -1;
584 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
585 iface->route_preference = 0;
590 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
591 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
592 sizeof(iface->dhcpv6_pd_manager) - 1);
594 if ((c = tb[IFACE_ATTR_PD_CER]) &&
595 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
598 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
599 iface->learn_routes = blobmsg_get_bool(c);
601 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
602 iface->external = blobmsg_get_bool(c);
607 close_interface(iface);
611 static int set_interface(struct uci_section *s)
613 blob_buf_init(&b, 0);
614 uci_to_blob(&b, s, &interface_attr_list);
616 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
619 void odhcpd_reload(void)
621 struct uci_context *uci = uci_alloc_context();
623 while (!list_empty(&leases))
624 free_lease(list_first_entry(&leases, struct lease, head));
626 struct interface *master = NULL, *i, *n;
631 list_for_each_entry(i, &interfaces, head)
634 struct uci_package *dhcp = NULL;
635 if (!uci_load(uci, "dhcp", &dhcp)) {
636 struct uci_element *e;
637 uci_foreach_element(&dhcp->sections, e) {
638 struct uci_section *s = uci_to_section(e);
639 if (!strcmp(s->type, "host"))
641 else if (!strcmp(s->type, "odhcpd"))
645 uci_foreach_element(&dhcp->sections, e) {
646 struct uci_section *s = uci_to_section(e);
647 if (!strcmp(s->type, "dhcp"))
652 if (config.dhcp_statefile) {
653 char *path = strdup(config.dhcp_statefile);
655 mkdir_p(dirname(path), 0755);
660 ubus_apply_network();
663 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
666 list_for_each_entry(i, &interfaces, head) {
670 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
671 any_dhcpv6_slave = true;
673 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
676 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
677 any_ndp_slave = true;
680 /* Evaluate hybrid mode for master */
681 list_for_each_entry(i, &interfaces, head) {
685 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
687 if (!ubus_has_prefix(i->name, i->ifname))
688 hybrid_mode = RELAYD_RELAY;
691 if (i->dhcpv6 == RELAYD_HYBRID)
692 i->dhcpv6 = hybrid_mode;
694 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
695 i->dhcpv6 = RELAYD_DISABLED;
697 if (i->ra == RELAYD_HYBRID)
700 if (i->ra == RELAYD_RELAY && !any_ra_slave)
701 i->ra = RELAYD_DISABLED;
703 if (i->ndp == RELAYD_HYBRID)
704 i->ndp = hybrid_mode;
706 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
707 i->ndp = RELAYD_DISABLED;
709 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
714 list_for_each_entry_safe(i, n, &interfaces, head) {
716 /* Resolve hybrid mode */
717 if (i->dhcpv6 == RELAYD_HYBRID)
718 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
719 RELAYD_RELAY : RELAYD_SERVER;
721 if (i->ra == RELAYD_HYBRID)
722 i->ra = (master && master->ra == RELAYD_RELAY) ?
723 RELAYD_RELAY : RELAYD_SERVER;
725 if (i->ndp == RELAYD_HYBRID)
726 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
727 RELAYD_RELAY : RELAYD_DISABLED;
729 setup_router_interface(i, !i->ignore || i->ra != RELAYD_DISABLED);
730 setup_dhcpv6_interface(i, !i->ignore || i->dhcpv6 != RELAYD_DISABLED);
731 setup_ndp_interface(i, !i->ignore || i->ndp != RELAYD_DISABLED);
732 setup_dhcpv4_interface(i, !i->ignore || i->dhcpv4 != RELAYD_DISABLED);
738 uci_unload(uci, dhcp);
739 uci_free_context(uci);
742 static void handle_signal(int signal)
746 if (signal == SIGHUP) {
747 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
752 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
755 if (read(u->fd, b, sizeof(b)) < 0) {}
760 static struct uloop_fd reload_fd = { .cb = reload_cb };
762 void odhcpd_run(void)
764 if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
766 reload_fd.fd = reload_pipe[0];
767 uloop_fd_add(&reload_fd, ULOOP_READ);
769 signal(SIGTERM, handle_signal);
770 signal(SIGINT, handle_signal);
771 signal(SIGHUP, handle_signal);
781 while (!list_empty(&interfaces))
782 close_interface(list_first_entry(&interfaces, struct interface, head));