Merge pull request #13 from dedeckeh/bugfixes
[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_RA_DEFAULT,
36         IFACE_ATTR_RA_MANAGEMENT,
37         IFACE_ATTR_RA_OFFLINK,
38         IFACE_ATTR_RA_PREFERENCE,
39         IFACE_ATTR_PD_MANAGER,
40         IFACE_ATTR_PD_CER,
41         IFACE_ATTR_NDPROXY_ROUTING,
42         IFACE_ATTR_NDPROXY_SLAVE,
43         IFACE_ATTR_NDPROXY_STATIC,
44         IFACE_ATTR_MAX
45 };
46
47 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
48         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
49         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
50         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
51         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
52         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
53         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
54         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
55         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
56         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
57         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
58         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
59         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
60         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
61         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
62         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
63         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
64         [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
65         [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
66         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
67         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
68         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
69         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
70         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
71         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
72         [IFACE_ATTR_NDPROXY_STATIC] = { .name = "ndproxy_static", .type = BLOBMSG_TYPE_ARRAY },
73 };
74
75 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
76         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
77         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
78         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
79         [IFACE_ATTR_NDPROXY_STATIC] = { .type = BLOBMSG_TYPE_STRING },
80 };
81
82 const struct uci_blob_param_list interface_attr_list = {
83         .n_params = IFACE_ATTR_MAX,
84         .params = iface_attrs,
85         .info = iface_attr_info,
86 };
87
88
89 enum {
90         LEASE_ATTR_IP,
91         LEASE_ATTR_MAC,
92         LEASE_ATTR_DUID,
93         LEASE_ATTR_HOSTID,
94         LEASE_ATTR_NAME,
95         LEASE_ATTR_MAX
96 };
97
98
99 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
100         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
101         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
102         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
103         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
104         [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
105 };
106
107
108 const struct uci_blob_param_list lease_attr_list = {
109         .n_params = LEASE_ATTR_MAX,
110         .params = lease_attrs,
111 };
112
113
114 enum {
115         ODHCPD_ATTR_MAINDHCP,
116         ODHCPD_ATTR_LEASEFILE,
117         ODHCPD_ATTR_LEASETRIGGER,
118         ODHCPD_ATTR_MAX
119 };
120
121
122 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
123         [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
124         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
125         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
126 };
127
128
129 const struct uci_blob_param_list odhcpd_attr_list = {
130         .n_params = ODHCPD_ATTR_MAX,
131         .params = odhcpd_attrs,
132 };
133
134
135 static struct interface* get_interface(const char *name)
136 {
137         struct interface *c;
138         list_for_each_entry(c, &interfaces, head)
139                 if (!strcmp(c->name, name))
140                         return c;
141         return NULL;
142 }
143
144
145 static void clean_interface(struct interface *iface)
146 {
147         free(iface->dns);
148         free(iface->search);
149         free(iface->upstream);
150         free(iface->static_ndp);
151         free(iface->dhcpv4_dns);
152         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
153 }
154
155
156 static void close_interface(struct interface *iface)
157 {
158         if (iface->head.next)
159                 list_del(&iface->head);
160
161         setup_router_interface(iface, false);
162         setup_dhcpv6_interface(iface, false);
163         setup_ndp_interface(iface, false);
164         setup_dhcpv4_interface(iface, false);
165
166         clean_interface(iface);
167         free(iface);
168 }
169
170
171 static int parse_mode(const char *mode)
172 {
173         if (!strcmp(mode, "disabled")) {
174                 return RELAYD_DISABLED;
175         } else if (!strcmp(mode, "server")) {
176                 return RELAYD_SERVER;
177         } else if (!strcmp(mode, "relay")) {
178                 return RELAYD_RELAY;
179         } else if (!strcmp(mode, "hybrid")) {
180                 return RELAYD_HYBRID;
181         } else {
182                 return -1;
183         }
184 }
185
186
187 static void set_config(struct uci_section *s)
188 {
189         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
190
191         blob_buf_init(&b, 0);
192         uci_to_blob(&b, s, &odhcpd_attr_list);
193         blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
194
195         if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
196                 config.legacy = blobmsg_get_bool(c);
197
198         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
199                 free(config.dhcp_statefile);
200                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
201         }
202
203         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
204                 free(config.dhcp_cb);
205                 config.dhcp_cb = strdup(blobmsg_get_string(c));
206         }
207 }
208
209
210 static int set_lease(struct uci_section *s)
211 {
212         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
213
214         blob_buf_init(&b, 0);
215         uci_to_blob(&b, s, &lease_attr_list);
216         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
217
218         size_t hostlen = 1;
219         if ((c = tb[LEASE_ATTR_NAME]))
220                 hostlen = blobmsg_data_len(c);
221
222         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
223         if (!lease)
224                 goto err;
225
226         if (hostlen > 1)
227                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
228
229         if ((c = tb[LEASE_ATTR_IP]))
230                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
231                         goto err;
232
233         if ((c = tb[LEASE_ATTR_MAC]))
234                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
235                         goto err;
236
237         if ((c = tb[LEASE_ATTR_DUID])) {
238                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
239                 lease->duid = malloc(duidlen);
240                 if (!lease->duid)
241                         goto err;
242
243                 ssize_t len = odhcpd_unhexlify(lease->duid,
244                                 duidlen, blobmsg_get_string(c));
245
246                 if (len < 0)
247                         goto err;
248
249                 lease->duid_len = len;
250         }
251
252         if ((c = tb[LEASE_ATTR_HOSTID]))
253                 if (odhcpd_unhexlify((uint8_t*)&lease->hostid, sizeof(lease->hostid),
254                                 blobmsg_get_string(c)) < 0)
255                         goto err;
256
257         list_add(&lease->head, &leases);
258         return 0;
259
260 err:
261         if (lease) {
262                 free(lease->duid);
263                 free(lease);
264         }
265         return -1;
266 }
267
268
269 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
270 {
271         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
272         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
273
274         if (tb[IFACE_ATTR_INTERFACE])
275                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
276
277         if (!name)
278                 return -1;
279
280         struct interface *iface = get_interface(name);
281         if (!iface) {
282                 iface = calloc(1, sizeof(*iface));
283                 if (!iface)
284                         return -1;
285
286                 strncpy(iface->name, name, sizeof(iface->name) - 1);
287                 list_add(&iface->head, &interfaces);
288                 overwrite = true;
289         }
290
291         const char *ifname = NULL;
292 #ifdef WITH_UBUS
293         if (overwrite || !iface->ifname[0])
294                 ifname = ubus_get_ifname(name);
295 #endif
296
297         if (overwrite) {
298                 if ((c = tb[IFACE_ATTR_IFNAME]))
299                         ifname = blobmsg_get_string(c);
300                 else if ((c = tb[IFACE_ATTR_NETWORKID]))
301                         ifname = blobmsg_get_string(c);
302         }
303
304         if (!iface->ifname[0] && !ifname)
305                 return -1;
306
307         if (ifname)
308                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
309
310         if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
311                 return -1;
312
313         iface->inuse = true;
314
315         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
316                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
317
318         if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
319                 iface->ignore = blobmsg_get_bool(c);
320
321         if ((c = tb[IFACE_ATTR_LEASETIME])) {
322                 char *val = blobmsg_get_string(c), *endptr;
323                 double time = strtod(val, &endptr);
324                 if (time && endptr[0]) {
325                         if (endptr[0] == 's')
326                                 time *= 1;
327                         else if (endptr[0] == 'm')
328                                 time *= 60;
329                         else if (endptr[0] == 'h')
330                                 time *= 3600;
331                         else if (endptr[0] == 'd')
332                                 time *= 24 * 3600;
333                         else if (endptr[0] == 'w')
334                                 time *= 7 * 24 * 3600;
335                         else
336                                 goto err;
337                 }
338
339                 if (time >= 60)
340                         iface->dhcpv4_leasetime = time;
341         }
342
343         if ((c = tb[IFACE_ATTR_START])) {
344                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
345
346                 if (config.legacy)
347                         iface->dhcpv4 = RELAYD_SERVER;
348         }
349
350         if ((c = tb[IFACE_ATTR_LIMIT]))
351                 iface->dhcpv4_end.s_addr = htonl(
352                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
353
354         if ((c = tb[IFACE_ATTR_MASTER]))
355                 iface->master = blobmsg_get_bool(c);
356
357         if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
358                 struct blob_attr *cur;
359                 unsigned rem;
360
361                 blobmsg_for_each_attr(cur, c, rem) {
362                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
363                                 continue;
364
365                         iface->upstream = realloc(iface->upstream,
366                                         iface->upstream_len + blobmsg_data_len(cur));
367                         if (!iface->upstream)
368                                 goto err;
369
370                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
371                         iface->upstream_len += blobmsg_data_len(cur);
372                 }
373         }
374
375         int mode;
376         if ((c = tb[IFACE_ATTR_RA])) {
377                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
378                         iface->ra = mode;
379                 else
380                         goto err;
381         }
382
383         if ((c = tb[IFACE_ATTR_DHCPV4])) {
384                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
385                         iface->dhcpv4 = mode;
386                 else
387                         goto err;
388         }
389
390         if ((c = tb[IFACE_ATTR_DHCPV6])) {
391                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
392                         iface->dhcpv6 = mode;
393                 else
394                         goto err;
395         }
396
397         if ((c = tb[IFACE_ATTR_NDP])) {
398                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
399                         iface->ndp = mode;
400                 else
401                         goto err;
402         }
403
404         if ((c = tb[IFACE_ATTR_DNS])) {
405                 struct blob_attr *cur;
406                 unsigned rem;
407
408                 iface->always_rewrite_dns = true;
409                 blobmsg_for_each_attr(cur, c, rem) {
410                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
411                                 continue;
412
413                         struct in_addr addr4;
414                         struct in6_addr addr6;
415                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
416                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
417                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
418                                 if (!iface->dhcpv4_dns)
419                                         goto err;
420
421                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
422                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
423                                 iface->dns = realloc(iface->dns,
424                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
425                                 if (!iface->dns)
426                                         goto err;
427
428                                 iface->dns[iface->dns_cnt - 1] = addr6;
429                         } else {
430                                 goto err;
431                         }
432                 }
433         }
434
435         if ((c = tb[IFACE_ATTR_DOMAIN])) {
436                 struct blob_attr *cur;
437                 unsigned rem;
438
439                 blobmsg_for_each_attr(cur, c, rem) {
440                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
441                                 continue;
442
443                         uint8_t buf[256];
444                         int len = dn_comp(blobmsg_get_string(cur), buf, sizeof(buf), NULL, NULL);
445                         if (len <= 0)
446                                 goto err;
447
448                         iface->search = realloc(iface->search, iface->search_len + len);
449                         if (!iface->search)
450                                 goto err;
451
452                         memcpy(&iface->search[iface->search_len], buf, len);
453                         iface->search_len += len;
454                 }
455         }
456
457         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
458                 iface->default_router = blobmsg_get_u32(c);
459
460         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
461                 iface->managed = blobmsg_get_u32(c);
462         else if (overwrite)
463                 iface->managed = 1;
464
465         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
466                 iface->ra_not_onlink = blobmsg_get_bool(c);
467
468         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
469                 const char *prio = blobmsg_get_string(c);
470
471                 if (!strcmp(prio, "high"))
472                         iface->route_preference = 1;
473                 else if (!strcmp(prio, "low"))
474                         iface->route_preference = -1;
475                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
476                         iface->route_preference = 0;
477                 else
478                         goto err;
479         }
480
481         if ((c = tb[IFACE_ATTR_PD_MANAGER]))
482                 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
483                                 sizeof(iface->dhcpv6_pd_manager) - 1);
484
485         if ((c = tb[IFACE_ATTR_PD_CER]) &&
486                         inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
487                 goto err;
488
489         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
490                 iface->learn_routes = blobmsg_get_bool(c);
491         else if (overwrite)
492                 iface->learn_routes = true;
493
494         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
495                 iface->external = blobmsg_get_bool(c);
496
497         if ((c = tb[IFACE_ATTR_NDPROXY_STATIC])) {
498                 struct blob_attr *cur;
499                 unsigned rem;
500
501                 blobmsg_for_each_attr(cur, c, rem) {
502                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
503                                 continue;
504
505                         int len = blobmsg_data_len(cur);
506                         iface->static_ndp = realloc(iface->static_ndp, iface->static_ndp_len + len);
507                         if (!iface->static_ndp)
508                                 goto err;
509
510                         if (iface->static_ndp_len)
511                                 iface->static_ndp[iface->static_ndp_len - 1] = ' ';
512
513                         memcpy(&iface->static_ndp[iface->static_ndp_len], blobmsg_get_string(cur), len);
514                         iface->static_ndp_len += len;
515                 }
516         }
517
518         return 0;
519
520 err:
521         close_interface(iface);
522         return -1;
523 }
524
525 static int set_interface(struct uci_section *s)
526 {
527         blob_buf_init(&b, 0);
528         uci_to_blob(&b, s, &interface_attr_list);
529         return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
530 }
531
532
533 void odhcpd_reload(void)
534 {
535         struct uci_context *uci = uci_alloc_context();
536         while (!list_empty(&leases)) {
537                 struct lease *l = list_first_entry(&leases, struct lease, head);
538                 list_del(&l->head);
539                 free(l->duid);
540                 free(l);
541         }
542
543         struct interface *master = NULL, *i, *n;
544
545         if (!uci)
546                 return;
547
548         list_for_each_entry(i, &interfaces, head)
549                 clean_interface(i);
550
551         struct uci_package *dhcp = NULL;
552         if (!uci_load(uci, "dhcp", &dhcp)) {
553                 struct uci_element *e;
554                 uci_foreach_element(&dhcp->sections, e) {
555                         struct uci_section *s = uci_to_section(e);
556                         if (!strcmp(s->type, "host"))
557                                 set_lease(s);
558                         else if (!strcmp(s->type, "odhcpd"))
559                                 set_config(s);
560                 }
561
562                 uci_foreach_element(&dhcp->sections, e) {
563                         struct uci_section *s = uci_to_section(e);
564                         if (!strcmp(s->type, "dhcp"))
565                                 set_interface(s);
566                 }
567         }
568
569
570 #ifdef WITH_UBUS
571         ubus_apply_network();
572 #endif
573
574         bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
575
576         // Test for
577         list_for_each_entry(i, &interfaces, head) {
578                 if (i->master)
579                         continue;
580
581                 if (i->dhcpv6 == RELAYD_HYBRID || i->dhcpv6 == RELAYD_RELAY)
582                         any_dhcpv6_slave = true;
583
584                 if (i->ra == RELAYD_HYBRID || i->ra == RELAYD_RELAY)
585                         any_ra_slave = true;
586
587                 if (i->ndp == RELAYD_HYBRID || i->ndp == RELAYD_RELAY)
588                         any_ndp_slave = true;
589         }
590
591         // Evaluate hybrid mode for master
592         list_for_each_entry(i, &interfaces, head) {
593                 if (!i->master)
594                         continue;
595
596                 enum odhcpd_mode hybrid_mode = RELAYD_DISABLED;
597 #ifdef WITH_UBUS
598                 if (!ubus_has_prefix(i->name, i->ifname))
599                         hybrid_mode = RELAYD_RELAY;
600 #endif
601
602                 if (i->dhcpv6 == RELAYD_HYBRID)
603                         i->dhcpv6 = hybrid_mode;
604
605                 if (i->dhcpv6 == RELAYD_RELAY && !any_dhcpv6_slave)
606                         i->dhcpv6 = RELAYD_DISABLED;
607
608                 if (i->ra == RELAYD_HYBRID)
609                         i->ra = hybrid_mode;
610
611                 if (i->ra == RELAYD_RELAY && !any_ra_slave)
612                         i->ra = RELAYD_DISABLED;
613
614                 if (i->ndp == RELAYD_HYBRID)
615                         i->ndp = hybrid_mode;
616
617                 if (i->ndp == RELAYD_RELAY && !any_ndp_slave)
618                         i->ndp = RELAYD_DISABLED;
619
620                 if (i->dhcpv6 == RELAYD_RELAY || i->ra == RELAYD_RELAY || i->ndp == RELAYD_RELAY)
621                         master = i;
622         }
623
624
625         list_for_each_entry_safe(i, n, &interfaces, head) {
626                 if (i->inuse) {
627                         // Resolve hybrid mode
628                         if (i->dhcpv6 == RELAYD_HYBRID)
629                                 i->dhcpv6 = (master && master->dhcpv6 == RELAYD_RELAY) ?
630                                                 RELAYD_RELAY : RELAYD_SERVER;
631
632                         if (i->ra == RELAYD_HYBRID)
633                                 i->ra = (master && master->ra == RELAYD_RELAY) ?
634                                                 RELAYD_RELAY : RELAYD_SERVER;
635
636                         if (i->ndp == RELAYD_HYBRID)
637                                 i->ndp = (master && master->ndp == RELAYD_RELAY) ?
638                                                 RELAYD_RELAY : RELAYD_DISABLED;
639
640                         setup_router_interface(i, true);
641                         setup_dhcpv6_interface(i, true);
642                         setup_ndp_interface(i, true);
643                         setup_dhcpv4_interface(i, true);
644                 } else {
645                         close_interface(i);
646                 }
647         }
648
649         uci_unload(uci, dhcp);
650         uci_free_context(uci);
651 }
652
653
654 static void handle_signal(int signal)
655 {
656         char b[1] = {0};
657         if (signal == SIGHUP)
658                 write(reload_pipe[1], b, sizeof(b));
659         else
660                 uloop_end();
661 }
662
663
664
665 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
666 {
667         char b[512];
668         read(u->fd, b, sizeof(b));
669         odhcpd_reload();
670 }
671
672 static struct uloop_fd reload_fd = { .cb = reload_cb };
673
674 void odhcpd_run(void)
675 {
676         pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC);
677         reload_fd.fd = reload_pipe[0];
678         uloop_fd_add(&reload_fd, ULOOP_READ);
679
680         signal(SIGTERM, handle_signal);
681         signal(SIGINT, handle_signal);
682         signal(SIGHUP, handle_signal);
683
684 #ifdef WITH_UBUS
685         while (init_ubus())
686                 sleep(1);
687 #endif
688
689         odhcpd_reload();
690         uloop_run();
691 }
692