d33309f6dc9809dec74d74d9bd5eed076ffd7ca4
[project/odhcpd.git] / src / config.c
1 #include <fcntl.h>
2 #include <resolv.h>
3 #include <signal.h>
4 #include <arpa/inet.h>
5 #include <unistd.h>
6
7 #include <uci.h>
8 #include <uci_blob.h>
9
10 #include "odhcpd.h"
11
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};
17
18 enum {
19         IFACE_ATTR_INTERFACE,
20         IFACE_ATTR_IFNAME,
21         IFACE_ATTR_NETWORKID,
22         IFACE_ATTR_DYNAMICDHCP,
23         IFACE_ATTR_IGNORE,
24         IFACE_ATTR_LEASETIME,
25         IFACE_ATTR_LIMIT,
26         IFACE_ATTR_START,
27         IFACE_ATTR_MASTER,
28         IFACE_ATTR_UPSTREAM,
29         IFACE_ATTR_RA,
30         IFACE_ATTR_DHCPV4,
31         IFACE_ATTR_DHCPV6,
32         IFACE_ATTR_NDP,
33         IFACE_ATTR_DNS,
34         IFACE_ATTR_DOMAIN,
35         IFACE_ATTR_ULA_COMPAT,
36         IFACE_ATTR_RA_DEFAULT,
37         IFACE_ATTR_RA_MANAGEMENT,
38         IFACE_ATTR_RA_OFFLINK,
39         IFACE_ATTR_RA_PREFERENCE,
40         IFACE_ATTR_NDPROXY_ROUTING,
41         IFACE_ATTR_NDPROXY_SLAVE,
42         IFACE_ATTR_NDPROXY_STATIC,
43         IFACE_ATTR_MAX
44 };
45
46 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
47         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
48         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
49         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
50         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
51         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
52         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
53         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
54         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
55         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
56         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
57         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
58         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
59         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
60         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
61         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
62         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
63         [IFACE_ATTR_ULA_COMPAT] = { .name = "ula_compat", .type = BLOBMSG_TYPE_BOOL },
64         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
65         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
66         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
67         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
68         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
69         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
70         [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
71 };
72
73 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
74         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
75         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
76         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
77         [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
78 };
79
80 const struct uci_blob_param_list interface_attr_list = {
81         .n_params = IFACE_ATTR_MAX,
82         .params = iface_attrs,
83         .info = iface_attr_info,
84 };
85
86
87 enum {
88         LEASE_ATTR_IP,
89         LEASE_ATTR_MAC,
90         LEASE_ATTR_DUID,
91         LEASE_ATTR_HOSTID,
92         LEASE_ATTR_HOSTNAME,
93         LEASE_ATTR_MAX
94 };
95
96
97 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
98         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
99         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
100         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
101         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
102         [LEASE_ATTR_HOSTNAME] = { .name = "hostname", .type = BLOBMSG_TYPE_STRING },
103 };
104
105
106 const struct uci_blob_param_list lease_attr_list = {
107         .n_params = LEASE_ATTR_MAX,
108         .params = lease_attrs,
109 };
110
111
112 enum {
113         ODHCPD_ATTR_LEGACY,
114         ODHCPD_ATTR_LEASEFILE,
115         ODHCPD_ATTR_LEASETRIGGER,
116         ODHCPD_ATTR_MAX
117 };
118
119
120 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
121         [ODHCPD_ATTR_LEGACY] = { .name = "legacy", .type = BLOBMSG_TYPE_BOOL },
122         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
123         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
124 };
125
126
127 const struct uci_blob_param_list odhcpd_attr_list = {
128         .n_params = ODHCPD_ATTR_MAX,
129         .params = odhcpd_attrs,
130 };
131
132
133 static struct interface* get_interface(const char *name)
134 {
135         struct interface *c;
136         list_for_each_entry(c, &interfaces, head)
137                 if (!strcmp(c->name, name))
138                         return c;
139         return NULL;
140 }
141
142
143 static void clean_interface(struct interface *iface)
144 {
145         free(iface->dns);
146         free(iface->search);
147         free(iface->upstream);
148         free(iface->static_ndp);
149         free(iface->dhcpv4_dns);
150         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
151 }
152
153
154 static void close_interface(struct interface *iface)
155 {
156         if (iface->head.next)
157                 list_del(&iface->head);
158
159         setup_router_interface(iface, false);
160         setup_dhcpv6_interface(iface, false);
161         setup_ndp_interface(iface, false);
162         setup_dhcpv4_interface(iface, false);
163
164         clean_interface(iface);
165         free(iface);
166 }
167
168
169 static int parse_mode(const char *mode)
170 {
171         if (!strcmp(mode, "disabled")) {
172                 return RELAYD_DISABLED;
173         } else if (!strcmp(mode, "server")) {
174                 return RELAYD_SERVER;
175         } else if (!strcmp(mode, "relay")) {
176                 return RELAYD_RELAY;
177         } else if (!strcmp(mode, "hybrid")) {
178                 return RELAYD_HYBRID;
179         } else {
180                 return -1;
181         }
182 }
183
184
185 static void set_config(struct uci_section *s)
186 {
187         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
188
189         blob_buf_init(&b, 0);
190         uci_to_blob(&b, s, &lease_attr_list);
191         blobmsg_parse(lease_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
192
193         if ((c = tb[ODHCPD_ATTR_LEGACY]))
194                 config.legacy = blobmsg_get_bool(c);
195
196         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
197                 free(config.dhcp_statefile);
198                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
199         }
200
201         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
202                 free(config.dhcp_cb);
203                 config.dhcp_cb = strdup(blobmsg_get_string(c));
204         }
205 }
206
207
208 static int set_lease(struct uci_section *s)
209 {
210         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
211
212         blob_buf_init(&b, 0);
213         uci_to_blob(&b, s, &lease_attr_list);
214         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
215
216         size_t hostlen = 1;
217         if ((c = tb[LEASE_ATTR_HOSTNAME]))
218                 hostlen = blobmsg_data_len(c);
219
220         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
221
222         if (hostlen > 1)
223                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
224
225         if ((c = tb[LEASE_ATTR_IP]))
226                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
227                         goto err;
228
229         if ((c = tb[LEASE_ATTR_MAC]))
230                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
231                         goto err;
232
233         if ((c = tb[LEASE_ATTR_DUID])) {
234                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
235                 lease->duid = malloc(duidlen);
236                 ssize_t len = odhcpd_unhexlify(lease->duid,
237                                 duidlen, blobmsg_get_string(c));
238
239                 if (len < 0)
240                         goto err;
241
242                 lease->duid_len = len;
243         }
244
245         if ((c = tb[LEASE_ATTR_HOSTID]))
246                 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
247                                 blobmsg_get_string(c)) < 0)
248                         goto err;
249
250         list_add(&lease->head, &leases);
251         return 0;
252
253 err:
254         free(lease->duid);
255         free(lease);
256         return -1;
257 }
258
259
260 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
261 {
262         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
263         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
264
265         if (tb[IFACE_ATTR_INTERFACE])
266                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
267
268         if (!name)
269                 return -1;
270
271         struct interface *iface = get_interface(name);
272         if (!iface) {
273                 iface = calloc(1, sizeof(*iface));
274                 strncpy(iface->name, name, sizeof(iface->name) - 1);
275                 list_add(&iface->head, &interfaces);
276         } else if (overwrite) {
277                 clean_interface(iface);
278         }
279
280         const char *ifname = NULL;
281 #ifdef WITH_UBUS
282         if (overwrite || !iface->ifname[0])
283                 ifname = ubus_get_ifname(name);
284 #endif
285         if ((c = tb[IFACE_ATTR_IFNAME]))
286                 ifname = blobmsg_get_string(c);
287         else if ((c = tb[IFACE_ATTR_NETWORKID]))
288                 ifname = blobmsg_get_string(c);
289
290         if (!iface->ifname[0] && !ifname)
291                 return -1;
292
293         if (ifname)
294                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
295
296         iface->inuse = true;
297
298         if (overwrite)
299                 clean_interface(iface);
300
301         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
302                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
303
304         if ((c = tb[IFACE_ATTR_IGNORE]))
305                 iface->ignore = blobmsg_get_bool(c);
306
307         if ((c = tb[IFACE_ATTR_LEASETIME])) {
308                 char *val = blobmsg_get_string(c), *endptr;
309                 double time = strtod(val, &endptr);
310                 if (time && endptr[0]) {
311                         if (endptr[0] == 's')
312                                 time *= 1;
313                         else if (endptr[0] == 'm')
314                                 time *= 60;
315                         else if (endptr[0] == 'h')
316                                 time *= 3600;
317                         else if (endptr[0] == 'd')
318                                 time *= 24 * 3600;
319                         else if (endptr[0] == 'w')
320                                 time *= 7 * 24 * 3600;
321                         else
322                                 goto err;
323                 }
324
325                 if (time >= 60)
326                         iface->dhcpv4_leasetime = time;
327         }
328
329         if ((c = tb[IFACE_ATTR_START])) {
330                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
331
332                 if (config.legacy)
333                         iface->dhcpv4 = RELAYD_SERVER;
334         }
335
336         if ((c = tb[IFACE_ATTR_LIMIT]))
337                 iface->dhcpv4_end.s_addr = htonl(
338                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
339
340         if ((c = tb[IFACE_ATTR_MASTER]))
341                 iface->master = blobmsg_get_bool(c);
342
343         if ((c = tb[IFACE_ATTR_UPSTREAM])) {
344                 struct blob_attr *cur;
345                 unsigned rem;
346
347                 blobmsg_for_each_attr(cur, c, rem) {
348                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
349                                 continue;
350
351                         iface->upstream = realloc(iface->upstream,
352                                         iface->upstream_len + blobmsg_data_len(cur));
353                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
354                         iface->upstream_len += blobmsg_data_len(cur);
355                 }
356         }
357
358         int mode;
359         if ((c = tb[IFACE_ATTR_RA])) {
360                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
361                         iface->ra = mode;
362                 else
363                         goto err;
364         }
365
366         if ((c = tb[IFACE_ATTR_DHCPV4])) {
367                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
368                         iface->dhcpv4 = mode;
369                 else
370                         goto err;
371         }
372
373         if ((c = tb[IFACE_ATTR_DHCPV6])) {
374                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
375                         iface->dhcpv6 = mode;
376                 else
377                         goto err;
378         }
379
380         if ((c = tb[IFACE_ATTR_NDP])) {
381                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
382                         iface->ndp = mode;
383                 else
384                         goto err;
385         }
386
387         if ((c = tb[IFACE_ATTR_DNS])) {
388                 struct blob_attr *cur;
389                 unsigned rem;
390
391                 iface->always_rewrite_dns = true;
392                 blobmsg_for_each_attr(cur, c, rem) {
393                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
394                                 continue;
395
396                         struct in_addr addr4;
397                         struct in6_addr addr6;
398                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
399                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
400                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
401                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
402                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
403                                 iface->dns = realloc(iface->dns,
404                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
405                                 iface->dns[iface->dns_cnt - 1] = addr6;
406                         } else {
407                                 goto err;
408                         }
409                 }
410         }
411
412         if ((c = tb[IFACE_ATTR_DOMAIN])) {
413                 struct blob_attr *cur;
414                 unsigned rem;
415
416                 blobmsg_for_each_attr(cur, c, rem) {
417                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
418                                 continue;
419
420                         uint8_t buf[256];
421                         int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
422                         if (len <= 0)
423                                 goto err;
424
425                         iface->search = realloc(iface->search, iface->search_len + len);
426                         memcpy(&iface->search[iface->search_len], buf, len);
427                         iface->search_len += len;
428                 }
429         }
430
431         if ((c = tb[IFACE_ATTR_ULA_COMPAT]))
432                 iface->deprecate_ula_if_public_avail = blobmsg_get_bool(c);
433
434         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
435                 iface->default_router = blobmsg_get_u32(c);
436
437         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
438                 iface->managed = blobmsg_get_u32(c);
439
440         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
441                 iface->ra_not_onlink = blobmsg_get_bool(c);
442
443         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
444                 const char *prio = blobmsg_get_string(c);
445
446                 if (!strcmp(prio, "high"))
447                         iface->route_preference = 1;
448                 else if (!strcmp(prio, "low"))
449                         iface->route_preference = -1;
450                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
451                         iface->route_preference = 0;
452                 else
453                         goto err;
454         }
455
456         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
457                 iface->learn_routes = blobmsg_get_bool(c);
458
459         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
460                 iface->external = blobmsg_get_bool(c);
461
462         if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
463                 struct blob_attr *cur;
464                 unsigned rem;
465
466                 blobmsg_for_each_attr(cur, c, rem) {
467                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
468                                 continue;
469
470                         int len = blobmsg_data_len(cur);
471                         iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
472                         memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
473                         iface->static_ndp_len += len;
474                 }
475         }
476
477         iface->ignore = (iface->ifindex = if_nametoindex(iface->ifname)) < 0;
478         return 0;
479
480 err:
481         close_interface(iface);
482         return -1;
483 }
484
485 static int set_interface(struct uci_section *s)
486 {
487         blob_buf_init(&b, 0);
488         uci_to_blob(&b, s, &interface_attr_list);
489         return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
490 }
491
492
493 void odhcpd_reload(void)
494 {
495         struct uci_context *uci = uci_alloc_context();
496         struct lease *l;
497         list_for_each_entry(l, &leases, head) {
498                 list_del(&l->head);
499                 free(l->duid);
500                 free(l);
501         }
502
503         struct uci_package *dhcp = NULL;
504         if (!uci_load(uci, "dhcp", &dhcp)) {
505                 struct uci_element *e;
506                 uci_foreach_element(&dhcp->sections, e) {
507                         struct uci_section *s = uci_to_section(e);
508                         if (!strcmp(s->type, "lease"))
509                                 set_lease(s);
510                         else if (!strcmp(s->type, "odhcpd"))
511                                 set_config(s);
512                 }
513
514                 uci_foreach_element(&dhcp->sections, e) {
515                         struct uci_section *s = uci_to_section(e);
516                         if (!strcmp(s->type, "dhcp"))
517                                 set_interface(s);
518                 }
519         }
520
521 #ifdef WITH_UBUS
522         ubus_apply_network();
523 #endif
524
525         // Evaluate hybrid mode for master
526         struct interface *master = NULL, *i, *n;
527         list_for_each_entry(i, &interfaces, head) {
528                 if (!i->master)
529                         continue;
530
531                 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
532 #ifdef WITH_UBUS
533                 if (ubus_has_prefix(i->name, i->ifname))
534                         hybrid_mode = RELAYD_RELAY;
535 #endif
536
537                 if (i->dhcpv6 == RELAYD_HYBRID)
538                         i->dhcpv6 = hybrid_mode;
539
540                 if (i->ra == RELAYD_HYBRID)
541                         i->ra = hybrid_mode;
542
543                 if (i->ndp == RELAYD_HYBRID)
544                         i->ndp = hybrid_mode;
545
546                 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
547                         master = i;
548         }
549
550
551         list_for_each_entry_safe(i, n, &interfaces, head) {
552                 if (i->inuse) {
553                         // Resolve hybrid mode
554                         if (i->dhcpv6 == RELAYD_HYBRID)
555                                 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
556                                                 RELAYD_RELAY : RELAYD_SERVER;
557
558                         if (i->ra == RELAYD_HYBRID)
559                                 i->ra = (master && master->ra == RELAYD_RELAY) ?
560                                                 RELAYD_RELAY : RELAYD_SERVER;
561
562                         if (i->ndp == RELAYD_HYBRID)
563                                 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
564                                                 RELAYD_RELAY : RELAYD_SERVER;
565
566                         setup_router_interface(i, true);
567                         setup_dhcpv6_interface(i, true);
568                         setup_ndp_interface(i, true);
569                         setup_dhcpv4_interface(i, true);
570                         i->inuse = false;
571                 } else {
572                         close_interface(i);
573                 }
574         }
575
576         uci_unload(uci, dhcp);
577         uci_free_context(uci);
578 }
579
580
581 static void handle_signal(int signal)
582 {
583         char b[1] = {0};
584         if (signal == SIGHUP)
585                 write(reload_pipe[1], b, sizeof(b));
586         else
587                 uloop_end();
588 }
589
590
591
592 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
593 {
594         char b[512];
595         read(u->fd, b, sizeof(b));
596         odhcpd_reload();
597 }
598
599 static struct uloop_fd reload_fd = { .cb = reload_cb };
600
601 void odhcpd_run(void)
602 {
603         pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
604         reload_fd.fd = reload_pipe[0];
605         uloop_fd_add(&reload_fd, ULOOP_READ);
606
607         signal(SIGTERM, handle_signal);
608         signal(SIGINT, handle_signal);
609         signal(SIGHUP, handle_signal);
610
611 #ifdef WITH_UBUS
612         init_ubus();
613 #endif
614
615         odhcpd_reload();
616         uloop_run();
617 }
618