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router: advertise removed addresses as invalid in 3 consecutive RAs
[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 #include <libgen.h>
7 #include <net/if.h>
8 #include <string.h>
9 #include <sys/stat.h>
10 #include <syslog.h>
11
12 #include <uci.h>
13 #include <uci_blob.h>
14 #include <libubox/utils.h>
15 #include <libubox/avl.h>
16 #include <libubox/avl-cmp.h>
17 #include <libubox/list.h>
18 #include <libubox/vlist.h>
19
20 #include "odhcpd.h"
21
22 static struct blob_buf b;
23 static int reload_pipe[2] = { -1, -1 };
24
25 static int lease_cmp(const void *k1, const void *k2, void *ptr);
26 static void lease_update(struct vlist_tree *tree, struct vlist_node *node_new,
27 struct vlist_node *node_old);
28
29 struct vlist_tree leases = VLIST_TREE_INIT(leases, lease_cmp, lease_update, true, false);
30 AVL_TREE(interfaces, avl_strcmp, false, NULL);
31 struct config config = {.legacy = false, .main_dhcpv4 = false,
32 .dhcp_cb = NULL, .dhcp_statefile = NULL,
33 .log_level = LOG_WARNING};
34
35 #define START_DEFAULT 100
36 #define LIMIT_DEFAULT 150
37
38 #define HOSTID_LEN_MIN 12
39 #define HOSTID_LEN_MAX 64
40 #define HOSTID_LEN_DEFAULT HOSTID_LEN_MIN
41
42 #define OAF_DHCPV6 (OAF_DHCPV6_NA | OAF_DHCPV6_PD)
43
44 enum {
45 IFACE_ATTR_INTERFACE,
46 IFACE_ATTR_IFNAME,
47 IFACE_ATTR_NETWORKID,
48 IFACE_ATTR_DYNAMICDHCP,
49 IFACE_ATTR_LEASETIME,
50 IFACE_ATTR_LIMIT,
51 IFACE_ATTR_START,
52 IFACE_ATTR_MASTER,
53 IFACE_ATTR_UPSTREAM,
54 IFACE_ATTR_RA,
55 IFACE_ATTR_DHCPV4,
56 IFACE_ATTR_DHCPV6,
57 IFACE_ATTR_NDP,
58 IFACE_ATTR_ROUTER,
59 IFACE_ATTR_DNS,
60 IFACE_ATTR_DNS_SERVICE,
61 IFACE_ATTR_DOMAIN,
62 IFACE_ATTR_FILTER_CLASS,
63 IFACE_ATTR_DHCPV4_FORCERECONF,
64 IFACE_ATTR_DHCPV6_RAW,
65 IFACE_ATTR_DHCPV6_ASSIGNALL,
66 IFACE_ATTR_DHCPV6_PD,
67 IFACE_ATTR_DHCPV6_NA,
68 IFACE_ATTR_DHCPV6_HOSTID_LEN,
69 IFACE_ATTR_RA_DEFAULT,
70 IFACE_ATTR_RA_MANAGEMENT,
71 IFACE_ATTR_RA_FLAGS,
72 IFACE_ATTR_RA_SLAAC,
73 IFACE_ATTR_RA_OFFLINK,
74 IFACE_ATTR_RA_PREFERENCE,
75 IFACE_ATTR_RA_ADVROUTER,
76 IFACE_ATTR_RA_MININTERVAL,
77 IFACE_ATTR_RA_MAXINTERVAL,
78 IFACE_ATTR_RA_LIFETIME,
79 IFACE_ATTR_RA_USELEASETIME,
80 IFACE_ATTR_RA_REACHABLETIME,
81 IFACE_ATTR_RA_RETRANSTIME,
82 IFACE_ATTR_RA_HOPLIMIT,
83 IFACE_ATTR_RA_MTU,
84 IFACE_ATTR_RA_DNS,
85 IFACE_ATTR_PD_MANAGER,
86 IFACE_ATTR_PD_CER,
87 IFACE_ATTR_NDPROXY_ROUTING,
88 IFACE_ATTR_NDPROXY_SLAVE,
89 IFACE_ATTR_PREFIX_FILTER,
90 IFACE_ATTR_PREFERRED_LIFETIME,
91 IFACE_ATTR_MAX
92 };
93
94 static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
95 [IFACE_ATTR_INTERFACE] = { .name = "interface", .type = BLOBMSG_TYPE_STRING },
96 [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
97 [IFACE_ATTR_NETWORKID] = { .name = "networkid", .type = BLOBMSG_TYPE_STRING },
98 [IFACE_ATTR_DYNAMICDHCP] = { .name = "dynamicdhcp", .type = BLOBMSG_TYPE_BOOL },
99 [IFACE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
100 [IFACE_ATTR_START] = { .name = "start", .type = BLOBMSG_TYPE_INT32 },
101 [IFACE_ATTR_LIMIT] = { .name = "limit", .type = BLOBMSG_TYPE_INT32 },
102 [IFACE_ATTR_MASTER] = { .name = "master", .type = BLOBMSG_TYPE_BOOL },
103 [IFACE_ATTR_UPSTREAM] = { .name = "upstream", .type = BLOBMSG_TYPE_ARRAY },
104 [IFACE_ATTR_RA] = { .name = "ra", .type = BLOBMSG_TYPE_STRING },
105 [IFACE_ATTR_DHCPV4] = { .name = "dhcpv4", .type = BLOBMSG_TYPE_STRING },
106 [IFACE_ATTR_DHCPV6] = { .name = "dhcpv6", .type = BLOBMSG_TYPE_STRING },
107 [IFACE_ATTR_NDP] = { .name = "ndp", .type = BLOBMSG_TYPE_STRING },
108 [IFACE_ATTR_ROUTER] = { .name = "router", .type = BLOBMSG_TYPE_ARRAY },
109 [IFACE_ATTR_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
110 [IFACE_ATTR_DNS_SERVICE] = { .name = "dns_service", .type = BLOBMSG_TYPE_BOOL },
111 [IFACE_ATTR_DOMAIN] = { .name = "domain", .type = BLOBMSG_TYPE_ARRAY },
112 [IFACE_ATTR_FILTER_CLASS] = { .name = "filter_class", .type = BLOBMSG_TYPE_STRING },
113 [IFACE_ATTR_DHCPV4_FORCERECONF] = { .name = "dhcpv4_forcereconf", .type = BLOBMSG_TYPE_BOOL },
114 [IFACE_ATTR_DHCPV6_RAW] = { .name = "dhcpv6_raw", .type = BLOBMSG_TYPE_STRING },
115 [IFACE_ATTR_DHCPV6_ASSIGNALL] = { .name ="dhcpv6_assignall", .type = BLOBMSG_TYPE_BOOL },
116 [IFACE_ATTR_DHCPV6_PD] = { .name = "dhcpv6_pd", .type = BLOBMSG_TYPE_BOOL },
117 [IFACE_ATTR_DHCPV6_NA] = { .name = "dhcpv6_na", .type = BLOBMSG_TYPE_BOOL },
118 [IFACE_ATTR_DHCPV6_HOSTID_LEN] = { .name = "dhcpv6_hostidlength", .type = BLOBMSG_TYPE_INT32 },
119 [IFACE_ATTR_PD_MANAGER] = { .name = "pd_manager", .type = BLOBMSG_TYPE_STRING },
120 [IFACE_ATTR_PD_CER] = { .name = "pd_cer", .type = BLOBMSG_TYPE_STRING },
121 [IFACE_ATTR_RA_DEFAULT] = { .name = "ra_default", .type = BLOBMSG_TYPE_INT32 },
122 [IFACE_ATTR_RA_MANAGEMENT] = { .name = "ra_management", .type = BLOBMSG_TYPE_INT32 },
123 [IFACE_ATTR_RA_FLAGS] = { .name = "ra_flags", . type = BLOBMSG_TYPE_ARRAY },
124 [IFACE_ATTR_RA_SLAAC] = { .name = "ra_slaac", .type = BLOBMSG_TYPE_BOOL },
125 [IFACE_ATTR_RA_OFFLINK] = { .name = "ra_offlink", .type = BLOBMSG_TYPE_BOOL },
126 [IFACE_ATTR_RA_PREFERENCE] = { .name = "ra_preference", .type = BLOBMSG_TYPE_STRING },
127 [IFACE_ATTR_RA_ADVROUTER] = { .name = "ra_advrouter", .type = BLOBMSG_TYPE_BOOL },
128 [IFACE_ATTR_RA_MININTERVAL] = { .name = "ra_mininterval", .type = BLOBMSG_TYPE_INT32 },
129 [IFACE_ATTR_RA_MAXINTERVAL] = { .name = "ra_maxinterval", .type = BLOBMSG_TYPE_INT32 },
130 [IFACE_ATTR_RA_LIFETIME] = { .name = "ra_lifetime", .type = BLOBMSG_TYPE_INT32 },
131 [IFACE_ATTR_RA_USELEASETIME] = { .name = "ra_useleasetime", .type = BLOBMSG_TYPE_BOOL },
132 [IFACE_ATTR_RA_REACHABLETIME] = { .name = "ra_reachabletime", .type = BLOBMSG_TYPE_INT32 },
133 [IFACE_ATTR_RA_RETRANSTIME] = { .name = "ra_retranstime", .type = BLOBMSG_TYPE_INT32 },
134 [IFACE_ATTR_RA_HOPLIMIT] = { .name = "ra_hoplimit", .type = BLOBMSG_TYPE_INT32 },
135 [IFACE_ATTR_RA_MTU] = { .name = "ra_mtu", .type = BLOBMSG_TYPE_INT32 },
136 [IFACE_ATTR_RA_DNS] = { .name = "ra_dns", .type = BLOBMSG_TYPE_BOOL },
137 [IFACE_ATTR_NDPROXY_ROUTING] = { .name = "ndproxy_routing", .type = BLOBMSG_TYPE_BOOL },
138 [IFACE_ATTR_NDPROXY_SLAVE] = { .name = "ndproxy_slave", .type = BLOBMSG_TYPE_BOOL },
139 [IFACE_ATTR_PREFIX_FILTER] = { .name = "prefix_filter", .type = BLOBMSG_TYPE_STRING },
140 [IFACE_ATTR_PREFERRED_LIFETIME] = { .name = "preferred_lifetime", .type = BLOBMSG_TYPE_STRING },
141 };
142
143 static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
144 [IFACE_ATTR_UPSTREAM] = { .type = BLOBMSG_TYPE_STRING },
145 [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
146 [IFACE_ATTR_DOMAIN] = { .type = BLOBMSG_TYPE_STRING },
147 };
148
149 const struct uci_blob_param_list interface_attr_list = {
150 .n_params = IFACE_ATTR_MAX,
151 .params = iface_attrs,
152 .info = iface_attr_info,
153 };
154
155 const struct blobmsg_policy lease_attrs[LEASE_ATTR_MAX] = {
156 [LEASE_ATTR_IP] = { .name = "ip", .type = BLOBMSG_TYPE_STRING },
157 [LEASE_ATTR_MAC] = { .name = "mac", .type = BLOBMSG_TYPE_STRING },
158 [LEASE_ATTR_DUID] = { .name = "duid", .type = BLOBMSG_TYPE_STRING },
159 [LEASE_ATTR_HOSTID] = { .name = "hostid", .type = BLOBMSG_TYPE_STRING },
160 [LEASE_ATTR_LEASETIME] = { .name = "leasetime", .type = BLOBMSG_TYPE_STRING },
161 [LEASE_ATTR_NAME] = { .name = "name", .type = BLOBMSG_TYPE_STRING },
162 };
163
164 const struct uci_blob_param_list lease_attr_list = {
165 .n_params = LEASE_ATTR_MAX,
166 .params = lease_attrs,
167 };
168
169 enum {
170 ODHCPD_ATTR_LEGACY,
171 ODHCPD_ATTR_MAINDHCP,
172 ODHCPD_ATTR_LEASEFILE,
173 ODHCPD_ATTR_LEASETRIGGER,
174 ODHCPD_ATTR_LOGLEVEL,
175 ODHCPD_ATTR_MAX
176 };
177
178 static const struct blobmsg_policy odhcpd_attrs[ODHCPD_ATTR_MAX] = {
179 [ODHCPD_ATTR_LEGACY] = { .name = "legacy", .type = BLOBMSG_TYPE_BOOL },
180 [ODHCPD_ATTR_MAINDHCP] = { .name = "maindhcp", .type = BLOBMSG_TYPE_BOOL },
181 [ODHCPD_ATTR_LEASEFILE] = { .name = "leasefile", .type = BLOBMSG_TYPE_STRING },
182 [ODHCPD_ATTR_LEASETRIGGER] = { .name = "leasetrigger", .type = BLOBMSG_TYPE_STRING },
183 [ODHCPD_ATTR_LOGLEVEL] = { .name = "loglevel", .type = BLOBMSG_TYPE_INT32 },
184 };
185
186 const struct uci_blob_param_list odhcpd_attr_list = {
187 .n_params = ODHCPD_ATTR_MAX,
188 .params = odhcpd_attrs,
189 };
190
191 static const struct { const char *name; uint8_t flag; } ra_flags[] = {
192 { .name = "managed-config", .flag = ND_RA_FLAG_MANAGED },
193 { .name = "other-config", .flag = ND_RA_FLAG_OTHER },
194 { .name = "home-agent", .flag = ND_RA_FLAG_HOME_AGENT },
195 { .name = "none", . flag = 0 },
196 { .name = NULL, },
197 };
198
199 static void set_interface_defaults(struct interface *iface)
200 {
201 iface->ignore = true;
202 iface->dhcpv4 = MODE_DISABLED;
203 iface->dhcpv6 = MODE_DISABLED;
204 iface->ra = MODE_DISABLED;
205 iface->ndp = MODE_DISABLED;
206 iface->learn_routes = 1;
207 iface->dhcp_leasetime = 43200;
208 iface->preferred_lifetime = 43200;
209 iface->dhcpv4_start.s_addr = htonl(START_DEFAULT);
210 iface->dhcpv4_end.s_addr = htonl(START_DEFAULT + LIMIT_DEFAULT - 1);
211 iface->dhcpv6_assignall = true;
212 iface->dhcpv6_pd = true;
213 iface->dhcpv6_na = true;
214 iface->dhcpv6_hostid_len = HOSTID_LEN_DEFAULT;
215 iface->dns_service = true;
216 iface->ra_flags = ND_RA_FLAG_OTHER;
217 iface->ra_slaac = true;
218 iface->ra_maxinterval = 600;
219 iface->ra_mininterval = iface->ra_maxinterval/3;
220 iface->ra_lifetime = -1;
221 iface->ra_dns = true;
222 }
223
224 static void clean_interface(struct interface *iface)
225 {
226 free(iface->dns);
227 free(iface->search);
228 free(iface->upstream);
229 free(iface->dhcpv4_router);
230 free(iface->dhcpv4_dns);
231 free(iface->dhcpv6_raw);
232 free(iface->filter_class);
233 memset(&iface->ra, 0, sizeof(*iface) - offsetof(struct interface, ra));
234 set_interface_defaults(iface);
235 }
236
237 static void close_interface(struct interface *iface)
238 {
239 avl_delete(&interfaces, &iface->avl);
240
241 router_setup_interface(iface, false);
242 dhcpv6_setup_interface(iface, false);
243 ndp_setup_interface(iface, false);
244 #ifdef DHCPV4_SUPPORT
245 dhcpv4_setup_interface(iface, false);
246 #endif
247
248 clean_interface(iface);
249 free(iface->addr4);
250 free(iface->addr6);
251 free(iface->invalid_addr6);
252 free(iface->ifname);
253 free(iface);
254 }
255
256 static int parse_mode(const char *mode)
257 {
258 if (!strcmp(mode, "disabled"))
259 return MODE_DISABLED;
260 else if (!strcmp(mode, "server"))
261 return MODE_SERVER;
262 else if (!strcmp(mode, "relay"))
263 return MODE_RELAY;
264 else if (!strcmp(mode, "hybrid"))
265 return MODE_HYBRID;
266 else
267 return -1;
268 }
269
270 static int parse_ra_flags(uint8_t *flags, struct blob_attr *attr)
271 {
272 struct blob_attr *cur;
273 unsigned rem;
274
275 blobmsg_for_each_attr(cur, attr, rem) {
276 int i;
277
278 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
279 continue;
280
281 if (!blobmsg_check_attr(cur, false))
282 continue;
283
284 for (i = 0; ra_flags[i].name; i++) {
285 if (!strcmp(ra_flags[i].name, blobmsg_get_string(cur))) {
286 *flags |= ra_flags[i].flag;
287 break;
288 }
289 }
290
291 if (!ra_flags[i].name)
292 return -1;
293 }
294
295 return 0;
296 }
297
298 static void set_config(struct uci_section *s)
299 {
300 struct blob_attr *tb[ODHCPD_ATTR_MAX], *c;
301
302 blob_buf_init(&b, 0);
303 uci_to_blob(&b, s, &odhcpd_attr_list);
304 blobmsg_parse(odhcpd_attrs, ODHCPD_ATTR_MAX, tb, blob_data(b.head), blob_len(b.head));
305
306 if ((c = tb[ODHCPD_ATTR_LEGACY]))
307 config.legacy = blobmsg_get_bool(c);
308
309 if ((c = tb[ODHCPD_ATTR_MAINDHCP]))
310 config.main_dhcpv4 = blobmsg_get_bool(c);
311
312 if ((c = tb[ODHCPD_ATTR_LEASEFILE])) {
313 free(config.dhcp_statefile);
314 config.dhcp_statefile = strdup(blobmsg_get_string(c));
315 }
316
317 if ((c = tb[ODHCPD_ATTR_LEASETRIGGER])) {
318 free(config.dhcp_cb);
319 config.dhcp_cb = strdup(blobmsg_get_string(c));
320 }
321
322 if ((c = tb[ODHCPD_ATTR_LOGLEVEL])) {
323 int log_level = (blobmsg_get_u32(c) & LOG_PRIMASK);
324
325 if (config.log_level != log_level) {
326 config.log_level = log_level;
327 setlogmask(LOG_UPTO(config.log_level));
328 }
329 }
330 }
331
332 static double parse_leasetime(struct blob_attr *c) {
333 char *val = blobmsg_get_string(c), *endptr = NULL;
334 double time = strcmp(val, "infinite") ? strtod(val, &endptr) : UINT32_MAX;
335
336 if (time && endptr && endptr[0]) {
337 if (endptr[0] == 's')
338 time *= 1;
339 else if (endptr[0] == 'm')
340 time *= 60;
341 else if (endptr[0] == 'h')
342 time *= 3600;
343 else if (endptr[0] == 'd')
344 time *= 24 * 3600;
345 else if (endptr[0] == 'w')
346 time *= 7 * 24 * 3600;
347 else
348 goto err;
349 }
350
351 if (time < 60)
352 time = 60;
353
354 return time;
355
356 err:
357 return -1;
358 }
359
360 static void free_lease(struct lease *l)
361 {
362 free(l->hostname);
363 free(l);
364 }
365
366
367 int set_lease_from_blobmsg(struct blob_attr *ba)
368 {
369 struct blob_attr *tb[LEASE_ATTR_MAX], *c;
370 struct lease *l;
371 size_t duidlen = 0;
372 uint8_t *duid;
373
374 blobmsg_parse(lease_attrs, LEASE_ATTR_MAX, tb, blob_data(ba), blob_len(ba));
375
376 if ((c = tb[LEASE_ATTR_DUID]))
377 duidlen = (blobmsg_data_len(c) - 1) / 2;
378
379 l = calloc_a(sizeof(*l), &duid, duidlen);
380 if (!l)
381 goto err;
382
383 if ((c = tb[LEASE_ATTR_MAC]))
384 if (!ether_aton_r(blobmsg_get_string(c), &l->mac))
385 goto err;
386
387 if ((c = tb[LEASE_ATTR_DUID])) {
388 ssize_t len;
389
390 l->duid = duid;
391 len = odhcpd_unhexlify(l->duid, duidlen, blobmsg_get_string(c));
392
393 if (len < 0)
394 goto err;
395
396 l->duid_len = len;
397 }
398
399 if ((c = tb[LEASE_ATTR_NAME])) {
400 l->hostname = strdup(blobmsg_get_string(c));
401 if (!l->hostname || !odhcpd_valid_hostname(l->hostname))
402 goto err;
403 }
404
405 if ((c = tb[LEASE_ATTR_IP]))
406 if (inet_pton(AF_INET, blobmsg_get_string(c), &l->ipaddr) < 0)
407 goto err;
408
409 if ((c = tb[LEASE_ATTR_HOSTID])) {
410 errno = 0;
411 l->hostid = strtoull(blobmsg_get_string(c), NULL, 16);
412 if (errno)
413 goto err;
414 } else {
415 uint32_t i4a = ntohl(l->ipaddr) & 0xff;
416 l->hostid = ((i4a / 100) << 8) | (((i4a % 100) / 10) << 4) | (i4a % 10);
417 }
418
419 if ((c = tb[LEASE_ATTR_LEASETIME])) {
420 double time = parse_leasetime(c);
421 if (time < 0)
422 goto err;
423
424 l->leasetime = time;
425 }
426
427 INIT_LIST_HEAD(&l->assignments);
428 vlist_add(&leases, &l->node, l);
429 return 0;
430
431 err:
432 if (l)
433 free_lease(l);
434
435 return -1;
436 }
437
438 static int set_lease_from_uci(struct uci_section *s)
439 {
440 blob_buf_init(&b, 0);
441 uci_to_blob(&b, s, &lease_attr_list);
442
443 return set_lease_from_blobmsg(b.head);
444 }
445
446 int config_parse_interface(void *data, size_t len, const char *name, bool overwrite)
447 {
448 struct interface *iface;
449 struct blob_attr *tb[IFACE_ATTR_MAX], *c;
450 bool get_addrs = false;
451 int mode;
452 const char *ifname = NULL;
453
454 blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb, data, len);
455
456 if (tb[IFACE_ATTR_INTERFACE])
457 name = blobmsg_get_string(tb[IFACE_ATTR_INTERFACE]);
458
459 if (!name)
460 return -1;
461
462 iface = avl_find_element(&interfaces, name, iface, avl);
463 if (!iface) {
464 char *new_name;
465
466 iface = calloc_a(sizeof(*iface), &new_name, strlen(name) + 1);
467 if (!iface)
468 return -1;
469
470 iface->name = strcpy(new_name, name);
471 iface->avl.key = iface->name;
472 iface->router_event.uloop.fd = -1;
473 iface->dhcpv6_event.uloop.fd = -1;
474 iface->ndp_event.uloop.fd = -1;
475 iface->ndp_ping_fd = -1;
476 iface->dhcpv4_event.uloop.fd = -1;
477 INIT_LIST_HEAD(&iface->ia_assignments);
478 INIT_LIST_HEAD(&iface->dhcpv4_assignments);
479 INIT_LIST_HEAD(&iface->dhcpv4_fr_ips);
480
481 set_interface_defaults(iface);
482
483 avl_insert(&interfaces, &iface->avl);
484 get_addrs = overwrite = true;
485 }
486
487 if (overwrite) {
488 if ((c = tb[IFACE_ATTR_IFNAME]))
489 ifname = blobmsg_get_string(c);
490 else if ((c = tb[IFACE_ATTR_NETWORKID]))
491 ifname = blobmsg_get_string(c);
492 }
493
494 #ifdef WITH_UBUS
495 if (overwrite || !iface->ifname)
496 ifname = ubus_get_ifname(name);
497 #endif
498
499 if (!iface->ifname && !ifname)
500 goto err;
501
502 if (ifname) {
503 free(iface->ifname);
504 iface->ifname = strdup(ifname);
505
506 if (!iface->ifname)
507 goto err;
508
509 if (!iface->ifindex &&
510 (iface->ifindex = if_nametoindex(iface->ifname)) <= 0)
511 goto err;
512 }
513
514 if (get_addrs) {
515 ssize_t len = netlink_get_interface_addrs(iface->ifindex,
516 true, &iface->addr6);
517
518 if (len > 0)
519 iface->addr6_len = len;
520
521 len = netlink_get_interface_addrs(iface->ifindex,
522 false, &iface->addr4);
523 if (len > 0)
524 iface->addr4_len = len;
525 }
526
527 iface->inuse = true;
528
529 if ((c = tb[IFACE_ATTR_DYNAMICDHCP]))
530 iface->no_dynamic_dhcp = !blobmsg_get_bool(c);
531
532 if ((c = tb[IFACE_ATTR_LEASETIME])) {
533 double time = parse_leasetime(c);
534
535 if (time >= 0)
536 iface->dhcp_leasetime = time;
537 else
538 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
539 iface_attrs[IFACE_ATTR_LEASETIME].name, iface->name);
540
541 }
542
543 if ((c = tb[IFACE_ATTR_PREFERRED_LIFETIME])) {
544 double time = parse_leasetime(c);
545
546 if (time >= 0)
547 iface->preferred_lifetime = time;
548 else
549 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
550 iface_attrs[IFACE_ATTR_PREFERRED_LIFETIME].name, iface->name);
551
552 }
553
554 if ((c = tb[IFACE_ATTR_START])) {
555 iface->dhcpv4_start.s_addr = htonl(blobmsg_get_u32(c));
556 iface->dhcpv4_end.s_addr = htonl(ntohl(iface->dhcpv4_start.s_addr) +
557 LIMIT_DEFAULT - 1);
558
559 if (config.main_dhcpv4 && config.legacy)
560 iface->dhcpv4 = MODE_SERVER;
561 }
562
563 if ((c = tb[IFACE_ATTR_LIMIT]))
564 iface->dhcpv4_end.s_addr = htonl(ntohl(iface->dhcpv4_start.s_addr) +
565 blobmsg_get_u32(c) - 1);
566
567 if ((c = tb[IFACE_ATTR_MASTER]))
568 iface->master = blobmsg_get_bool(c);
569
570 if (overwrite && (c = tb[IFACE_ATTR_UPSTREAM])) {
571 struct blob_attr *cur;
572 unsigned rem;
573
574 blobmsg_for_each_attr(cur, c, rem) {
575 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
576 continue;
577
578 iface->upstream = realloc(iface->upstream,
579 iface->upstream_len + blobmsg_data_len(cur));
580 if (!iface->upstream)
581 goto err;
582
583 memcpy(iface->upstream + iface->upstream_len, blobmsg_get_string(cur), blobmsg_data_len(cur));
584 iface->upstream_len += blobmsg_data_len(cur);
585 }
586 }
587
588 if ((c = tb[IFACE_ATTR_RA])) {
589 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0) {
590 iface->ra = mode;
591
592 if (iface->ra != MODE_DISABLED)
593 iface->ignore = false;
594 } else
595 syslog(LOG_ERR, "Invalid %s mode configured for interface '%s'",
596 iface_attrs[IFACE_ATTR_RA].name, iface->name);
597 }
598
599 if ((c = tb[IFACE_ATTR_DHCPV4])) {
600 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0) {
601 if (config.main_dhcpv4) {
602 iface->dhcpv4 = mode;
603
604 if (iface->dhcpv4 != MODE_DISABLED)
605 iface->ignore = false;
606 }
607 } else
608 syslog(LOG_ERR, "Invalid %s mode configured for interface %s",
609 iface_attrs[IFACE_ATTR_DHCPV4].name, iface->name);
610 }
611
612 if ((c = tb[IFACE_ATTR_DHCPV6])) {
613 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0) {
614 iface->dhcpv6 = mode;
615
616 if (iface->dhcpv6 != MODE_DISABLED)
617 iface->ignore = false;
618 } else
619 syslog(LOG_ERR, "Invalid %s mode configured for interface '%s'",
620 iface_attrs[IFACE_ATTR_DHCPV6].name, iface->name);
621 }
622
623 if ((c = tb[IFACE_ATTR_NDP])) {
624 if ((mode = parse_mode(blobmsg_get_string(c))) >= 0) {
625 iface->ndp = mode;
626
627 if (iface->ndp != MODE_DISABLED)
628 iface->ignore = false;
629 } else
630 syslog(LOG_ERR, "Invalid %s mode configured for interface '%s'",
631 iface_attrs[IFACE_ATTR_NDP].name, iface->name);
632 }
633
634 if ((c = tb[IFACE_ATTR_ROUTER])) {
635 struct blob_attr *cur;
636 unsigned rem;
637
638 blobmsg_for_each_attr(cur, c, rem) {
639 struct in_addr addr4;
640
641 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
642 continue;
643
644 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
645 iface->dhcpv4_router = realloc(iface->dhcpv4_router,
646 (++iface->dhcpv4_router_cnt) * sizeof(*iface->dhcpv4_router));
647 if (!iface->dhcpv4_router)
648 goto err;
649
650 iface->dhcpv4_router[iface->dhcpv4_router_cnt - 1] = addr4;
651 } else
652 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
653 iface_attrs[IFACE_ATTR_ROUTER].name, iface->name);
654 }
655 }
656
657 if ((c = tb[IFACE_ATTR_DNS])) {
658 struct blob_attr *cur;
659 unsigned rem;
660
661 iface->always_rewrite_dns = true;
662 blobmsg_for_each_attr(cur, c, rem) {
663 struct in_addr addr4;
664 struct in6_addr addr6;
665
666 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
667 continue;
668
669 if (inet_pton(AF_INET, blobmsg_get_string(cur), &addr4) == 1) {
670 if (addr4.s_addr == INADDR_ANY) {
671 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
672 iface_attrs[IFACE_ATTR_DNS].name, iface->name);
673
674 continue;
675 }
676
677 iface->dhcpv4_dns = realloc(iface->dhcpv4_dns,
678 (++iface->dhcpv4_dns_cnt) * sizeof(*iface->dhcpv4_dns));
679 if (!iface->dhcpv4_dns)
680 goto err;
681
682 iface->dhcpv4_dns[iface->dhcpv4_dns_cnt - 1] = addr4;
683 } else if (inet_pton(AF_INET6, blobmsg_get_string(cur), &addr6) == 1) {
684 if (IN6_IS_ADDR_UNSPECIFIED(&addr6)) {
685 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
686 iface_attrs[IFACE_ATTR_DNS].name, iface->name);
687
688 continue;
689 }
690
691 iface->dns = realloc(iface->dns,
692 (++iface->dns_cnt) * sizeof(*iface->dns));
693 if (!iface->dns)
694 goto err;
695
696 iface->dns[iface->dns_cnt - 1] = addr6;
697 } else
698 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
699 iface_attrs[IFACE_ATTR_DNS].name, iface->name);
700 }
701 }
702
703 if ((c = tb[IFACE_ATTR_DNS_SERVICE]))
704 iface->dns_service = blobmsg_get_bool(c);
705
706 if ((c = tb[IFACE_ATTR_DOMAIN])) {
707 struct blob_attr *cur;
708 unsigned rem;
709
710 blobmsg_for_each_attr(cur, c, rem) {
711 uint8_t buf[256];
712 char *domain = blobmsg_get_string(cur);
713 size_t domainlen = strlen(domain);
714 int len;
715
716 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING || !blobmsg_check_attr(cur, false))
717 continue;
718
719 domain = blobmsg_get_string(cur);
720 domainlen = strlen(domain);
721
722 if (domainlen > 0 && domain[domainlen - 1] == '.')
723 domain[domainlen - 1] = 0;
724
725 len = dn_comp(domain, buf, sizeof(buf), NULL, NULL);
726 if (len <= 0) {
727 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
728 iface_attrs[IFACE_ATTR_DOMAIN].name, iface->name);
729
730 continue;
731 }
732
733 iface->search = realloc(iface->search, iface->search_len + len);
734 if (!iface->search)
735 goto err;
736
737 memcpy(&iface->search[iface->search_len], buf, len);
738 iface->search_len += len;
739 }
740 }
741
742 if ((c = tb[IFACE_ATTR_FILTER_CLASS])) {
743 iface->filter_class = realloc(iface->filter_class, blobmsg_data_len(c) + 1);
744 memcpy(iface->filter_class, blobmsg_get_string(c), blobmsg_data_len(c) + 1);
745 }
746
747 if ((c = tb[IFACE_ATTR_DHCPV4_FORCERECONF]))
748 iface->dhcpv4_forcereconf = blobmsg_get_bool(c);
749
750 if ((c = tb[IFACE_ATTR_DHCPV6_RAW])) {
751 iface->dhcpv6_raw_len = blobmsg_data_len(c) / 2;
752 iface->dhcpv6_raw = realloc(iface->dhcpv6_raw, iface->dhcpv6_raw_len);
753 odhcpd_unhexlify(iface->dhcpv6_raw, iface->dhcpv6_raw_len, blobmsg_get_string(c));
754 }
755
756 if ((c = tb[IFACE_ATTR_DHCPV6_ASSIGNALL]))
757 iface->dhcpv6_assignall = blobmsg_get_bool(c);
758
759 if ((c = tb[IFACE_ATTR_DHCPV6_PD]))
760 iface->dhcpv6_pd = blobmsg_get_bool(c);
761
762 if ((c = tb[IFACE_ATTR_DHCPV6_NA]))
763 iface->dhcpv6_na = blobmsg_get_bool(c);
764
765 if ((c = tb[IFACE_ATTR_DHCPV6_HOSTID_LEN])) {
766 uint32_t hostid_len = blobmsg_get_u32(c);
767
768 if (hostid_len >= HOSTID_LEN_MIN && hostid_len <= HOSTID_LEN_MAX)
769 iface->dhcpv6_hostid_len = hostid_len;
770 else
771 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
772 iface_attrs[IFACE_ATTR_DHCPV6_HOSTID_LEN].name, iface->name);
773
774 }
775
776 if ((c = tb[IFACE_ATTR_RA_DEFAULT]))
777 iface->default_router = blobmsg_get_u32(c);
778
779 if (!tb[IFACE_ATTR_RA_FLAGS] && !tb[IFACE_ATTR_RA_SLAAC] &&
780 (c = tb[IFACE_ATTR_RA_MANAGEMENT])) {
781 switch (blobmsg_get_u32(c)) {
782 case 0:
783 iface->ra_flags = ND_RA_FLAG_OTHER;
784 iface->ra_slaac = true;
785 break;
786 case 1:
787 iface->ra_flags = ND_RA_FLAG_OTHER|ND_RA_FLAG_MANAGED;
788 iface->ra_slaac = true;
789 break;
790 case 2:
791 iface->ra_flags = ND_RA_FLAG_OTHER|ND_RA_FLAG_MANAGED;
792 iface->ra_slaac = false;
793 break;
794 default:
795 break;
796 }
797 }
798
799 if ((c = tb[IFACE_ATTR_RA_FLAGS])) {
800 iface->ra_flags = 0;
801
802 if (parse_ra_flags(&iface->ra_flags, c) < 0)
803 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
804 iface_attrs[IFACE_ATTR_RA_FLAGS].name, iface->name);
805 }
806
807 if ((c = tb[IFACE_ATTR_RA_REACHABLETIME])) {
808 uint32_t ra_reachabletime = blobmsg_get_u32(c);
809
810 if (ra_reachabletime <= 3600000)
811 iface->ra_reachabletime = ra_reachabletime;
812 else
813 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
814 iface_attrs[IFACE_ATTR_RA_REACHABLETIME].name, iface->name);
815 }
816
817 if ((c = tb[IFACE_ATTR_RA_RETRANSTIME])) {
818 uint32_t ra_retranstime = blobmsg_get_u32(c);
819
820 if (ra_retranstime <= 60000)
821 iface->ra_retranstime = ra_retranstime;
822 else
823 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
824 iface_attrs[IFACE_ATTR_RA_RETRANSTIME].name, iface->name);
825 }
826
827 if ((c = tb[IFACE_ATTR_RA_HOPLIMIT])) {
828 uint32_t ra_hoplimit = blobmsg_get_u32(c);
829
830 if (ra_hoplimit <= 255)
831 iface->ra_hoplimit = ra_hoplimit;
832 else
833 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
834 iface_attrs[IFACE_ATTR_RA_HOPLIMIT].name, iface->name);
835 }
836
837 if ((c = tb[IFACE_ATTR_RA_MTU])) {
838 uint32_t ra_mtu = blobmsg_get_u32(c);
839
840 if (ra_mtu >= 1280 || ra_mtu <= 65535)
841 iface->ra_mtu = ra_mtu;
842 else
843 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
844 iface_attrs[IFACE_ATTR_RA_MTU].name, iface->name);
845 }
846
847 if ((c = tb[IFACE_ATTR_RA_SLAAC]))
848 iface->ra_slaac = blobmsg_get_bool(c);
849
850 if ((c = tb[IFACE_ATTR_RA_OFFLINK]))
851 iface->ra_not_onlink = blobmsg_get_bool(c);
852
853 if ((c = tb[IFACE_ATTR_RA_ADVROUTER]))
854 iface->ra_advrouter = blobmsg_get_bool(c);
855
856 if ((c = tb[IFACE_ATTR_RA_MININTERVAL]))
857 iface->ra_mininterval = blobmsg_get_u32(c);
858
859 if ((c = tb[IFACE_ATTR_RA_MAXINTERVAL]))
860 iface->ra_maxinterval = blobmsg_get_u32(c);
861
862 if ((c = tb[IFACE_ATTR_RA_LIFETIME]))
863 iface->ra_lifetime = blobmsg_get_u32(c);
864
865 if ((c = tb[IFACE_ATTR_RA_USELEASETIME]))
866 iface->ra_useleasetime = blobmsg_get_bool(c);
867
868 if ((c = tb[IFACE_ATTR_RA_DNS]))
869 iface->ra_dns = blobmsg_get_bool(c);
870
871 if ((c = tb[IFACE_ATTR_RA_PREFERENCE])) {
872 const char *prio = blobmsg_get_string(c);
873
874 if (!strcmp(prio, "high"))
875 iface->route_preference = 1;
876 else if (!strcmp(prio, "low"))
877 iface->route_preference = -1;
878 else if (!strcmp(prio, "medium") || !strcmp(prio, "default"))
879 iface->route_preference = 0;
880 else
881 syslog(LOG_ERR, "Invalid %s mode configured for interface '%s'",
882 iface_attrs[IFACE_ATTR_RA_PREFERENCE].name, iface->name);
883 }
884
885 if ((c = tb[IFACE_ATTR_PD_MANAGER]))
886 strncpy(iface->dhcpv6_pd_manager, blobmsg_get_string(c),
887 sizeof(iface->dhcpv6_pd_manager) - 1);
888
889 if ((c = tb[IFACE_ATTR_PD_CER]) &&
890 inet_pton(AF_INET6, blobmsg_get_string(c), &iface->dhcpv6_pd_cer) < 1)
891 syslog(LOG_ERR, "Invalid %s value configured for interface '%s'",
892 iface_attrs[IFACE_ATTR_PD_CER].name, iface->name);
893
894 if ((c = tb[IFACE_ATTR_NDPROXY_ROUTING]))
895 iface->learn_routes = blobmsg_get_bool(c);
896
897 if ((c = tb[IFACE_ATTR_NDPROXY_SLAVE]))
898 iface->external = blobmsg_get_bool(c);
899
900 if ((c = tb[IFACE_ATTR_PREFIX_FILTER])) {
901 const char *str = blobmsg_get_string(c);
902 char *astr = malloc(strlen(str) + 1);
903 char *delim;
904 int l;
905
906 if (!astr || !strcpy(astr, str) ||
907 (delim = strchr(astr, '/')) == NULL || (*(delim++) = 0) ||
908 sscanf(delim, "%i", &l) == 0 || l > 128 ||
909 inet_pton(AF_INET6, astr, &iface->pio_filter_addr) == 0)
910 iface->pio_filter_length = 0;
911 else
912 iface->pio_filter_length = l;
913
914 if (astr)
915 free(astr);
916 }
917
918 return 0;
919
920 err:
921 close_interface(iface);
922 return -1;
923 }
924
925 static int set_interface(struct uci_section *s)
926 {
927 blob_buf_init(&b, 0);
928 uci_to_blob(&b, s, &interface_attr_list);
929
930 return config_parse_interface(blob_data(b.head), blob_len(b.head), s->e.name, true);
931 }
932
933 static void lease_delete_assignments(struct lease *l, bool v6)
934 {
935 struct dhcp_assignment *a, *tmp;
936 unsigned int flag = v6 ? OAF_DHCPV6 : OAF_DHCPV4;
937
938 list_for_each_entry_safe(a, tmp, &l->assignments, lease_list) {
939 if (a->flags & flag)
940 free_assignment(a);
941 }
942 }
943
944 static void lease_update_assignments(struct lease *l)
945 {
946 struct dhcp_assignment *a;
947
948 list_for_each_entry(a, &l->assignments, lease_list) {
949 if (a->hostname)
950 free(a->hostname);
951 a->hostname = NULL;
952
953 if (l->hostname)
954 a->hostname = strdup(l->hostname);
955
956 a->leasetime = l->leasetime;
957 }
958 }
959
960 static int lease_cmp(const void *k1, const void *k2, _unused void *ptr)
961 {
962 const struct lease *l1 = k1, *l2 = k2;
963 int cmp = 0;
964
965 if (l1->duid_len != l2->duid_len)
966 return l1->duid_len - l2->duid_len;
967
968 if (l1->duid_len && l2->duid_len)
969 cmp = memcmp(l1->duid, l2->duid, l1->duid_len);
970
971 if (cmp)
972 return cmp;
973
974 return memcmp(l1->mac.ether_addr_octet, l2->mac.ether_addr_octet,
975 sizeof(l1->mac.ether_addr_octet));
976 }
977
978 static void lease_change_config(struct lease *l_old, struct lease *l_new)
979 {
980 bool update = false;
981
982 if ((!!l_new->hostname != !!l_old->hostname) ||
983 (l_new->hostname && strcmp(l_new->hostname, l_old->hostname))) {
984 free(l_old->hostname);
985 l_old->hostname = NULL;
986
987 if (l_new->hostname)
988 l_old->hostname = strdup(l_new->hostname);
989
990 update = true;
991 }
992
993 if (l_old->leasetime != l_new->leasetime) {
994 l_old->leasetime = l_new->leasetime;
995 update = true;
996 }
997
998 if (l_old->ipaddr != l_new->ipaddr) {
999 l_old->ipaddr = l_new->ipaddr;
1000 lease_delete_assignments(l_old, false);
1001 }
1002
1003 if (l_old->hostid != l_new->hostid) {
1004 l_old->hostid = l_new->hostid;
1005 lease_delete_assignments(l_old, true);
1006 }
1007
1008 if (update)
1009 lease_update_assignments(l_old);
1010
1011 free_lease(l_new);
1012 }
1013
1014 static void lease_delete(struct lease *l)
1015 {
1016 struct dhcp_assignment *a, *tmp;
1017
1018 list_for_each_entry_safe(a, tmp, &l->assignments, lease_list)
1019 free_assignment(a);
1020
1021 free_lease(l);
1022 }
1023
1024 static void lease_update(_unused struct vlist_tree *tree, struct vlist_node *node_new,
1025 struct vlist_node *node_old)
1026 {
1027 struct lease *lease_new = container_of(node_new, struct lease, node);
1028 struct lease *lease_old = container_of(node_old, struct lease, node);
1029
1030 if (node_old && node_new)
1031 lease_change_config(lease_old, lease_new);
1032 else if (node_old)
1033 lease_delete(lease_old);
1034 }
1035
1036 struct lease *config_find_lease_by_duid(const uint8_t *duid, const uint16_t len)
1037 {
1038 struct lease *l;
1039
1040 vlist_for_each_element(&leases, l, node) {
1041 if (l->duid_len == len && !memcmp(l->duid, duid, len))
1042 return l;
1043 }
1044
1045 return NULL;
1046 }
1047
1048 struct lease *config_find_lease_by_mac(const uint8_t *mac)
1049 {
1050 struct lease *l;
1051
1052 vlist_for_each_element(&leases, l, node) {
1053 if (!memcmp(l->mac.ether_addr_octet, mac,
1054 sizeof(l->mac.ether_addr_octet)))
1055 return l;
1056 }
1057
1058 return NULL;
1059 }
1060
1061 struct lease *config_find_lease_by_hostid(const uint64_t hostid)
1062 {
1063 struct lease *l;
1064
1065 vlist_for_each_element(&leases, l, node) {
1066 if (l->hostid == hostid)
1067 return l;
1068 }
1069
1070 return NULL;
1071 }
1072
1073 struct lease *config_find_lease_by_ipaddr(const uint32_t ipaddr)
1074 {
1075 struct lease *l;
1076
1077 vlist_for_each_element(&leases, l, node) {
1078 if (l->ipaddr == ipaddr)
1079 return l;
1080 }
1081
1082 return NULL;
1083 }
1084
1085 void odhcpd_reload(void)
1086 {
1087 struct uci_context *uci = uci_alloc_context();
1088 struct interface *master = NULL, *i, *tmp;
1089
1090 if (!uci)
1091 return;
1092
1093 vlist_update(&leases);
1094 avl_for_each_element(&interfaces, i, avl)
1095 clean_interface(i);
1096
1097 struct uci_package *dhcp = NULL;
1098 if (!uci_load(uci, "dhcp", &dhcp)) {
1099 struct uci_element *e;
1100
1101 /* 1. Global settings */
1102 uci_foreach_element(&dhcp->sections, e) {
1103 struct uci_section *s = uci_to_section(e);
1104 if (!strcmp(s->type, "odhcpd"))
1105 set_config(s);
1106 }
1107
1108 /* 2. DHCP pools */
1109 uci_foreach_element(&dhcp->sections, e) {
1110 struct uci_section *s = uci_to_section(e);
1111 if (!strcmp(s->type, "dhcp"))
1112 set_interface(s);
1113 }
1114
1115 /* 3. Static leases */
1116 uci_foreach_element(&dhcp->sections, e) {
1117 struct uci_section* s = uci_to_section(e);
1118 if (!strcmp(s->type, "host"))
1119 set_lease_from_uci(s);
1120 }
1121 }
1122
1123 if (config.dhcp_statefile) {
1124 char *path = strdup(config.dhcp_statefile);
1125
1126 mkdir_p(dirname(path), 0755);
1127 free(path);
1128 }
1129
1130 vlist_flush(&leases);
1131
1132 #ifdef WITH_UBUS
1133 ubus_apply_network();
1134 #endif
1135
1136 bool any_dhcpv6_slave = false, any_ra_slave = false, any_ndp_slave = false;
1137
1138 /* Test for */
1139 avl_for_each_element(&interfaces, i, avl) {
1140 if (i->master)
1141 continue;
1142
1143 if (i->dhcpv6 == MODE_HYBRID || i->dhcpv6 == MODE_RELAY)
1144 any_dhcpv6_slave = true;
1145
1146 if (i->ra == MODE_HYBRID || i->ra == MODE_RELAY)
1147 any_ra_slave = true;
1148
1149 if (i->ndp == MODE_HYBRID || i->ndp == MODE_RELAY)
1150 any_ndp_slave = true;
1151 }
1152
1153 /* Evaluate hybrid mode for master */
1154 avl_for_each_element(&interfaces, i, avl) {
1155 if (!i->master)
1156 continue;
1157
1158 enum odhcpd_mode hybrid_mode = MODE_DISABLED;
1159 #ifdef WITH_UBUS
1160 if (!ubus_has_prefix(i->name, i->ifname))
1161 hybrid_mode = MODE_RELAY;
1162 #endif
1163
1164 if (i->dhcpv6 == MODE_HYBRID)
1165 i->dhcpv6 = hybrid_mode;
1166
1167 if (i->dhcpv6 == MODE_RELAY && !any_dhcpv6_slave)
1168 i->dhcpv6 = MODE_DISABLED;
1169
1170 if (i->ra == MODE_HYBRID)
1171 i->ra = hybrid_mode;
1172
1173 if (i->ra == MODE_RELAY && !any_ra_slave)
1174 i->ra = MODE_DISABLED;
1175
1176 if (i->ndp == MODE_HYBRID)
1177 i->ndp = hybrid_mode;
1178
1179 if (i->ndp == MODE_RELAY && !any_ndp_slave)
1180 i->ndp = MODE_DISABLED;
1181
1182 if (i->dhcpv6 == MODE_RELAY || i->ra == MODE_RELAY || i->ndp == MODE_RELAY)
1183 master = i;
1184 }
1185
1186
1187 avl_for_each_element_safe(&interfaces, i, avl, tmp) {
1188 if (i->inuse) {
1189 /* Resolve hybrid mode */
1190 if (i->dhcpv6 == MODE_HYBRID)
1191 i->dhcpv6 = (master && master->dhcpv6 == MODE_RELAY) ?
1192 MODE_RELAY : MODE_SERVER;
1193
1194 if (i->ra == MODE_HYBRID)
1195 i->ra = (master && master->ra == MODE_RELAY) ?
1196 MODE_RELAY : MODE_SERVER;
1197
1198 if (i->ndp == MODE_HYBRID)
1199 i->ndp = (master && master->ndp == MODE_RELAY) ?
1200 MODE_RELAY : MODE_DISABLED;
1201
1202 router_setup_interface(i, i->ra != MODE_DISABLED);
1203 dhcpv6_setup_interface(i, i->dhcpv6 != MODE_DISABLED);
1204 ndp_setup_interface(i, i->ndp != MODE_DISABLED);
1205 #ifdef DHCPV4_SUPPORT
1206 dhcpv4_setup_interface(i, i->dhcpv4 != MODE_DISABLED);
1207 #endif
1208 } else
1209 close_interface(i);
1210 }
1211
1212 uci_unload(uci, dhcp);
1213 uci_free_context(uci);
1214 }
1215
1216 static void handle_signal(int signal)
1217 {
1218 char b[1] = {0};
1219
1220 if (signal == SIGHUP) {
1221 if (write(reload_pipe[1], b, sizeof(b)) < 0) {}
1222 } else
1223 uloop_end();
1224 }
1225
1226 static void reload_cb(struct uloop_fd *u, _unused unsigned int events)
1227 {
1228 char b[512];
1229 if (read(u->fd, b, sizeof(b)) < 0) {}
1230
1231 odhcpd_reload();
1232 }
1233
1234 static struct uloop_fd reload_fd = { .fd = -1, .cb = reload_cb };
1235
1236 void odhcpd_run(void)
1237 {
1238 if (pipe2(reload_pipe, O_NONBLOCK | O_CLOEXEC) < 0) {}
1239
1240 reload_fd.fd = reload_pipe[0];
1241 uloop_fd_add(&reload_fd, ULOOP_READ);
1242
1243 signal(SIGTERM, handle_signal);
1244 signal(SIGINT, handle_signal);
1245 signal(SIGHUP, handle_signal);
1246
1247 #ifdef WITH_UBUS
1248 while (ubus_init())
1249 sleep(1);
1250 #endif
1251
1252 odhcpd_reload();
1253 uloop_run();
1254 }
OpenWrt DHCP Server