Add missing NDP sync features
[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_FILTER_CLASS,
36         IFACE_ATTR_DHCPV6_RAW,
37         IFACE_ATTR_RA_DEFAULT,
38         IFACE_ATTR_RA_MANAGEMENT,
39         IFACE_ATTR_RA_OFFLINK,
40         IFACE_ATTR_RA_PREFERENCE,
41         IFACE_ATTR_PD_MANAGER,
42         IFACE_ATTR_PD_CER,
43         IFACE_ATTR_NDPROXY_ROUTING,
44         IFACE_ATTR_NDPROXY_SLAVE,
45         IFACE_ATTR_MAX
46 };
47
48 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
49         [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
50         [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
51         [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
52         [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
53         [IFACE_ATTR_IGNORE] = { .name = "ignore", .type = BLOBMSG_TYPE_BOOL },
54         [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
55         [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
56         [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
57         [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
58         [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
59         [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
60         [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
61         [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
62         [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
63         [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
64         [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
65         [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
66         [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
67         [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
68         [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
69         [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
70         [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
71         [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
72         [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
73         [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
74         [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
75 };
76
77 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
78         [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
79         [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
80         [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
81 };
82
83 const struct uci_blob_param_list interface_attr_list = {
84         .n_params = IFACE_ATTR_MAX,
85         .params = iface_attrs,
86         .info = iface_attr_info,
87 };
88
89
90 enum {
91         LEASE_ATTR_IP,
92         LEASE_ATTR_MAC,
93         LEASE_ATTR_DUID,
94         LEASE_ATTR_HOSTID,
95         LEASE_ATTR_NAME,
96         LEASE_ATTR_MAX
97 };
98
99
100 static const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
101         [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
102         [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
103         [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
104         [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
105         [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
106 };
107
108
109 const struct uci_blob_param_list lease_attr_list = {
110         .n_params = LEASE_ATTR_MAX,
111         .params = lease_attrs,
112 };
113
114
115 enum {
116         ODHCPD_ATTR_MAINDHCP,
117         ODHCPD_ATTR_LEASEFILE,
118         ODHCPD_ATTR_LEASETRIGGER,
119         ODHCPD_ATTR_MAX
120 };
121
122
123 static const struct blobmsg_policy odhcpd_attrs[LEASE_ATTR_MAX] = {
124         [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
125         [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
126         [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
127 };
128
129
130 const struct uci_blob_param_list odhcpd_attr_list = {
131         .n_params = ODHCPD_ATTR_MAX,
132         .params = odhcpd_attrs,
133 };
134
135
136 static struct interface* get_interface(const char *name)
137 {
138         struct interface *c;
139         list_for_each_entry(c, &interfaces, head)
140                 if (!strcmp(c->name, name))
141                         return c;
142         return NULL;
143 }
144
145
146 static void clean_interface(struct interface *iface)
147 {
148         free(iface->dns);
149         free(iface->search);
150         free(iface->upstream);
151         free(iface->dhcpv4_dns);
152         free(iface->dhcpv6_raw);
153         free(iface->filter_class);
154         memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
155 }
156
157
158 static void close_interface(struct interface *iface)
159 {
160         if (iface->head.next)
161                 list_del(&iface->head);
162
163         setup_router_interface(iface, false);
164         setup_dhcpv6_interface(iface, false);
165         setup_ndp_interface(iface, false);
166         setup_dhcpv4_interface(iface, false);
167
168         clean_interface(iface);
169         free(iface);
170 }
171
172
173 static int parse_mode(const char *mode)
174 {
175         if (!strcmp(mode, "disabled")) {
176                 return RELAYD_DISABLED;
177         } else if (!strcmp(mode, "server")) {
178                 return RELAYD_SERVER;
179         } else if (!strcmp(mode, "relay")) {
180                 return RELAYD_RELAY;
181         } else if (!strcmp(mode, "hybrid")) {
182                 return RELAYD_HYBRID;
183         } else {
184                 return -1;
185         }
186 }
187
188
189 static void set_config(struct uci_section *s)
190 {
191         struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
192
193         blob_buf_init(&b, 0);
194         uci_to_blob(&b, s, &odhcpd_attr_list);
195         blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
196
197         if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
198                 config.legacy = blobmsg_get_bool(c);
199
200         if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
201                 free(config.dhcp_statefile);
202                 config.dhcp_statefile = strdup(blobmsg_get_string(c));
203         }
204
205         if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
206                 free(config.dhcp_cb);
207                 config.dhcp_cb = strdup(blobmsg_get_string(c));
208         }
209 }
210
211
212 static int set_lease(struct uci_section *s)
213 {
214         struct blob_attr *tb[LEASE_ATTR_MAX], *c;
215
216         blob_buf_init(&b, 0);
217         uci_to_blob(&b, s, &lease_attr_list);
218         blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
219
220         size_t hostlen = 1;
221         if ((c = tb[LEASE_ATTR_NAME]))
222                 hostlen = blobmsg_data_len(c);
223
224         struct lease *lease = calloc(1, sizeof(*lease) + hostlen);
225         if (!lease)
226                 goto err;
227
228         if (hostlen > 1)
229                 memcpy(lease->hostname, blobmsg_get_string(c), hostlen);
230
231         if ((c = tb[LEASE_ATTR_IP]))
232                 if (inet_pton(AF_INET, blobmsg_get_string(c), &lease->ipaddr) < 0)
233                         goto err;
234
235         if ((c = tb[LEASE_ATTR_MAC]))
236                 if (!ether_aton_r(blobmsg_get_string(c), &lease->mac))
237                         goto err;
238
239         if ((c = tb[LEASE_ATTR_DUID])) {
240                 size_t duidlen = (blobmsg_data_len(c) - 1) / 2;
241                 lease->duid = malloc(duidlen);
242                 if (!lease->duid)
243                         goto err;
244
245                 ssize_t len = odhcpd_unhexlify(lease->duid,
246                                 duidlen, blobmsg_get_string(c));
247
248                 if (len < 0)
249                         goto err;
250
251                 lease->duid_len = len;
252         }
253
254         if ((c = tb[LEASE_ATTR_HOSTID])) {
255                 errno = 0;
256                 lease->hostid = strtoul(blobmsg_get_string(c), NULL, 16);
257                 if (errno)
258                         goto err;
259         }
260
261         list_add(&lease->head, &leases);
262         return 0;
263
264 err:
265         if (lease) {
266                 free(lease->duid);
267                 free(lease);
268         }
269         return -1;
270 }
271
272
273 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
274 {
275         struct blob_attr *tb[IFACE_ATTR_MAX], *c;
276         blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
277
278         if (tb[IFACE_ATTR_INTERFACE])
279                 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
280
281         if (!name)
282                 return -1;
283
284         struct interface *iface = get_interface(name);
285         if (!iface) {
286                 iface = calloc(1, sizeof(*iface));
287                 if (!iface)
288                         return -1;
289
290                 strncpy(iface->name, name, sizeof(iface->name) - 1);
291                 list_add(&iface->head, &interfaces);
292                 overwrite = true;
293         }
294
295         const char *ifname = NULL;
296 #ifdef WITH_UBUS
297         if (overwrite || !iface->ifname[0])
298                 ifname = ubus_get_ifname(name);
299 #endif
300
301         if (overwrite) {
302                 if ((c = tb[IFACE_ATTR_IFNAME]))
303                         ifname = blobmsg_get_string(c);
304                 else if ((c = tb[IFACE_ATTR_NETWORKID]))
305                         ifname = blobmsg_get_string(c);
306         }
307
308         if (!iface->ifname[0] && !ifname)
309                 return -1;
310
311         if (ifname)
312                 strncpy(iface->ifname, ifname, sizeof(iface->ifname) - 1);
313
314         if ((iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
315                 return -1;
316
317         iface->inuse = true;
318
319         if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
320                 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
321
322         if (overwrite && (c = tb[IFACE_ATTR_IGNORE]))
323                 iface->ignore = blobmsg_get_bool(c);
324
325         if ((c = tb[IFACE_ATTR_LEASETIME])) {
326                 char *val = blobmsg_get_string(c), *endptr;
327                 double time = strtod(val, &endptr);
328                 if (time && endptr[0]) {
329                         if (endptr[0] == 's')
330                                 time *= 1;
331                         else if (endptr[0] == 'm')
332                                 time *= 60;
333                         else if (endptr[0] == 'h')
334                                 time *= 3600;
335                         else if (endptr[0] == 'd')
336                                 time *= 24 * 3600;
337                         else if (endptr[0] == 'w')
338                                 time *= 7 * 24 * 3600;
339                         else
340                                 goto err;
341                 }
342
343                 if (time >= 60)
344                         iface->dhcpv4_leasetime = time;
345         }
346
347         if ((c = tb[IFACE_ATTR_START])) {
348                 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
349
350                 if (config.legacy)
351                         iface->dhcpv4 = RELAYD_SERVER;
352         }
353
354         if ((c = tb[IFACE_ATTR_LIMIT]))
355                 iface->dhcpv4_end.s_addr = htonl(
356                                 ntohl(iface->dhcpv4_start.s_addr) + blobmsg_get_u32(c));
357
358         if ((c = tb[IFACE_ATTR_MASTER]))
359                 iface->master = blobmsg_get_bool(c);
360
361         if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
362                 struct blob_attr *cur;
363                 unsigned rem;
364
365                 blobmsg_for_each_attr(cur, c, rem) {
366                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
367                                 continue;
368
369                         iface->upstream = realloc(iface->upstream,
370                                         iface->upstream_len + blobmsg_data_len(cur));
371                         if (!iface->upstream)
372                                 goto err;
373
374                         memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
375                         iface->upstream_len += blobmsg_data_len(cur);
376                 }
377         }
378
379         int mode;
380         if ((c = tb[IFACE_ATTR_RA])) {
381                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
382                         iface->ra = mode;
383                 else
384                         goto err;
385         }
386
387         if ((c = tb[IFACE_ATTR_DHCPV4])) {
388                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
389                         iface->dhcpv4 = mode;
390                 else
391                         goto err;
392         }
393
394         if ((c = tb[IFACE_ATTR_DHCPV6])) {
395                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
396                         iface->dhcpv6 = mode;
397                 else
398                         goto err;
399         }
400
401         if ((c = tb[IFACE_ATTR_NDP])) {
402                 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0)
403                         iface->ndp = mode;
404                 else
405                         goto err;
406         }
407
408         if ((c = tb[IFACE_ATTR_DNS])) {
409                 struct blob_attr *cur;
410                 unsigned rem;
411
412                 iface->always_rewrite_dns = true;
413                 blobmsg_for_each_attr(cur, c, rem) {
414                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
415                                 continue;
416
417                         struct in_addr addr4;
418                         struct in6_addr addr6;
419                         if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
420                                 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
421                                                 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
422                                 if (!iface->dhcpv4_dns)
423                                         goto err;
424
425                                 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
426                         } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
427                                 iface->dns = realloc(iface->dns,
428                                                 (++iface->dns_cnt) * sizeof(*iface->dns));
429                                 if (!iface->dns)
430                                         goto err;
431
432                                 iface->dns[iface->dns_cnt - 1] = addr6;
433                         } else {
434                                 goto err;
435                         }
436                 }
437         }
438
439         if ((c = tb[IFACE_ATTR_DOMAIN])) {
440                 struct blob_attr *cur;
441                 unsigned rem;
442
443                 blobmsg_for_each_attr(cur, c, rem) {
444                         if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, NULL))
445                                 continue;
446
447                         uint8_t buf[256];
448                         char *domain = blobmsg_get_string(cur);
449                         size_t domainlen = strlen(domain);
450                         if (domainlen > 0 && domain[domainlen - 1] == '.')
451                                 domain[domainlen - 1] = 0;
452
453                         int len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
454                         free(domain);
455                         if (len <= 0)
456                                 goto err;
457
458                         iface->search = realloc(iface->search, iface->search_len + len);
459                         if (!iface->search)
460                                 goto err;
461
462                         memcpy(&iface->search[iface->search_len], buf, len);
463                         iface->search_len += len;
464                 }
465         }
466
467         if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
468                 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
469                 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
470         }
471
472         if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
473                 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
474                 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
475                 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
476         }
477
478         if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
479                 iface->default_router = blobmsg_get_u32(c);
480
481         if ((c = tb[IFACE_ATTR_RA_MANAGEMENT]))
482                 iface->managed = blobmsg_get_u32(c);
483         else if (overwrite)
484                 iface->managed = 1;
485
486         if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
487                 iface->ra_not_onlink = blobmsg_get_bool(c);
488
489         if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
490                 const char *prio = blobmsg_get_string(c);
491
492                 if (!strcmp(prio, "high"))
493                         iface->route_preference = 1;
494                 else if (!strcmp(prio, "low"))
495                         iface->route_preference = -1;
496                 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
497                         iface->route_preference = 0;
498                 else
499                         goto err;
500         }
501
502         if ((c = tb[IFACE_ATTR_PD_MANAGER]))
503                 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
504                                 sizeof(iface->dhcpv6_pd_manager) - 1);
505
506         if ((c = tb[IFACE_ATTR_PD_CER]) &&
507                         inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
508                 goto err;
509
510         if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
511                 iface->learn_routes = blobmsg_get_bool(c);
512         else if (overwrite)
513                 iface->learn_routes = true;
514
515         if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
516                 iface->external = blobmsg_get_bool(c);
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