2 * Copyright (C) 2013 Steven Barth <steven@midlink.org>
3 * Copyright (C) 2016 Hans Dedecker <dedeckeh@gmail.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License v2 as published by
7 * the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
32 #include <arpa/inet.h>
33 #include <sys/timerfd.h>
35 #include <libubox/md5.h>
36 #include <libubox/usock.h>
38 #define ADDR_ENTRY_VALID_IA_ADDR(iface, i, m, addrs) \
39 ((iface)->dhcpv6_assignall || (i) == (m) || \
40 (addrs)[(i)].prefix > 64)
42 static void dhcpv6_netevent_cb(unsigned long event
, struct netevent_handler_info
*info
);
43 static void set_border_assignment_size(struct interface
*iface
, struct dhcp_assignment
*b
);
44 static void handle_addrlist_change(struct netevent_handler_info
*info
);
45 static void start_reconf(struct dhcp_assignment
*a
);
46 static void stop_reconf(struct dhcp_assignment
*a
);
47 static void valid_until_cb(struct uloop_timeout
*event
);
49 static struct netevent_handler dhcpv6_netevent_handler
= { .cb
= dhcpv6_netevent_cb
, };
50 static struct uloop_timeout valid_until_timeout
= {.cb
= valid_until_cb
};
51 static uint32_t serial
= 0;
52 static uint8_t statemd5
[16];
54 int dhcpv6_ia_init(void)
56 uloop_timeout_set(&valid_until_timeout
, 1000);
58 netlink_add_netevent_handler(&dhcpv6_netevent_handler
);
63 int dhcpv6_ia_setup_interface(struct interface
*iface
, bool enable
)
65 if (!enable
&& iface
->ia_assignments
.next
) {
66 struct dhcp_assignment
*c
;
68 while (!list_empty(&iface
->ia_assignments
)) {
69 c
= list_first_entry(&iface
->ia_assignments
, struct dhcp_assignment
, head
);
74 if (enable
&& iface
->dhcpv6
== MODE_SERVER
) {
75 struct dhcp_assignment
*border
;
77 if (!iface
->ia_assignments
.next
)
78 INIT_LIST_HEAD(&iface
->ia_assignments
);
80 if (list_empty(&iface
->ia_assignments
)) {
81 border
= calloc(1, sizeof(*border
));
84 syslog(LOG_ERR
, "Calloc failed for border on %s", iface
->name
);
89 list_add(&border
->head
, &iface
->ia_assignments
);
91 border
= list_last_entry(&iface
->ia_assignments
, struct dhcp_assignment
, head
);
93 set_border_assignment_size(iface
, border
);
99 static void dhcpv6_netevent_cb(unsigned long event
, struct netevent_handler_info
*info
)
101 struct interface
*iface
= info
->iface
;
103 if (!iface
|| iface
->dhcpv6
!= MODE_SERVER
)
107 case NETEV_ADDR6LIST_CHANGE
:
108 handle_addrlist_change(info
);
116 static inline bool valid_prefix_length(const struct dhcp_assignment
*a
, const uint8_t prefix_length
)
118 return (a
->managed_size
|| a
->length
> prefix_length
);
121 static inline bool valid_addr(const struct odhcpd_ipaddr
*addr
, time_t now
)
123 return (addr
->prefix
<= 96 && addr
->preferred
> (uint32_t)now
);
126 static size_t get_preferred_addr(const struct odhcpd_ipaddr
*addrs
, const size_t addrlen
)
130 for (i
= 0, m
= 0; i
< addrlen
; ++i
) {
131 if (addrs
[i
].preferred
> addrs
[m
].preferred
||
132 (addrs
[i
].preferred
== addrs
[m
].preferred
&&
133 memcmp(&addrs
[i
].addr
, &addrs
[m
].addr
, 16) > 0))
140 static int send_reconf(struct dhcp_assignment
*assign
)
143 struct dhcpv6_client_header hdr
;
147 uint16_t hardware_type
;
152 struct dhcpv6_auth_reconfigure auth
;
155 uint8_t clid_data
[128];
156 } __attribute__((packed
)) reconf_msg
= {
157 .hdr
= {DHCPV6_MSG_RECONFIGURE
, {0, 0, 0}},
158 .srvid_type
= htons(DHCPV6_OPT_SERVERID
),
159 .srvid_len
= htons(10),
160 .duid_type
= htons(3),
161 .hardware_type
= htons(1),
162 .msg_type
= htons(DHCPV6_OPT_RECONF_MSG
),
164 .msg_id
= DHCPV6_MSG_RENEW
,
165 .auth
= {htons(DHCPV6_OPT_AUTH
),
166 htons(sizeof(reconf_msg
.auth
) - 4), 3, 1, 0,
167 {htonl(time(NULL
)), htonl(++serial
)}, 2, {0}},
168 .clid_type
= htons(DHCPV6_OPT_CLIENTID
),
169 .clid_len
= htons(assign
->clid_len
),
172 struct interface
*iface
= assign
->iface
;
174 odhcpd_get_mac(iface
, reconf_msg
.mac
);
175 memcpy(reconf_msg
.clid_data
, assign
->clid_data
, assign
->clid_len
);
176 struct iovec iov
= {&reconf_msg
, sizeof(reconf_msg
) - 128 + assign
->clid_len
};
179 uint8_t secretbytes
[64];
180 memset(secretbytes
, 0, sizeof(secretbytes
));
181 memcpy(secretbytes
, assign
->key
, sizeof(assign
->key
));
183 for (size_t i
= 0; i
< sizeof(secretbytes
); ++i
)
184 secretbytes
[i
] ^= 0x36;
187 md5_hash(secretbytes
, sizeof(secretbytes
), &md5
);
188 md5_hash(iov
.iov_base
, iov
.iov_len
, &md5
);
189 md5_end(reconf_msg
.auth
.key
, &md5
);
191 for (size_t i
= 0; i
< sizeof(secretbytes
); ++i
) {
192 secretbytes
[i
] ^= 0x36;
193 secretbytes
[i
] ^= 0x5c;
197 md5_hash(secretbytes
, sizeof(secretbytes
), &md5
);
198 md5_hash(reconf_msg
.auth
.key
, 16, &md5
);
199 md5_end(reconf_msg
.auth
.key
, &md5
);
201 return odhcpd_send(iface
->dhcpv6_event
.uloop
.fd
, &assign
->peer
, &iov
, 1, iface
);
204 static void dhcpv6_ia_free_assignment(struct dhcp_assignment
*a
)
206 if (a
->managed_sock
.fd
.registered
) {
207 ustream_free(&a
->managed_sock
.stream
);
208 close(a
->managed_sock
.fd
.fd
);
217 void dhcpv6_ia_enum_addrs(struct interface
*iface
, struct dhcp_assignment
*c
,
218 time_t now
, dhcpv6_binding_cb_handler_t func
, void *arg
)
220 struct odhcpd_ipaddr
*addrs
= (c
->managed
) ? c
->managed
: iface
->addr6
;
221 size_t addrlen
= (c
->managed
) ? (size_t)c
->managed_size
: iface
->addr6_len
;
222 size_t m
= get_preferred_addr(addrs
, addrlen
);
224 for (size_t i
= 0; i
< addrlen
; ++i
) {
225 struct in6_addr addr
;
226 uint32_t pref
, valid
;
227 int prefix
= c
->managed
? addrs
[i
].prefix
: c
->length
;
229 if (!valid_addr(&addrs
[i
], now
))
232 addr
= addrs
[i
].addr
.in6
;
233 pref
= addrs
[i
].preferred
;
234 valid
= addrs
[i
].valid
;
236 if (!ADDR_ENTRY_VALID_IA_ADDR(iface
, i
, m
, addrs
))
239 addr
.s6_addr32
[3] = htonl(c
->assigned
);
241 if (!valid_prefix_length(c
, addrs
[i
].prefix
))
244 addr
.s6_addr32
[1] |= htonl(c
->assigned
);
245 addr
.s6_addr32
[2] = addr
.s6_addr32
[3] = 0;
248 if (pref
!= UINT32_MAX
)
251 if (valid
!= UINT32_MAX
)
254 func(&addr
, prefix
, pref
, valid
, arg
);
261 struct dhcp_assignment
*c
;
262 struct interface
*iface
;
268 static void dhcpv6_write_ia_addr(struct in6_addr
*addr
, int prefix
, _unused
uint32_t pref
,
269 _unused
uint32_t valid
, void *arg
)
271 struct write_ctxt
*ctxt
= (struct write_ctxt
*)arg
;
272 char ipbuf
[INET6_ADDRSTRLEN
];
274 inet_ntop(AF_INET6
, addr
, ipbuf
, sizeof(ipbuf
) - 1);
276 if (ctxt
->c
->length
== 128 && ctxt
->c
->hostname
&&
277 !(ctxt
->c
->flags
& OAF_BROKEN_HOSTNAME
)) {
278 fputs(ipbuf
, ctxt
->fp
);
281 if (dn_expand(ctxt
->iface
->search
, ctxt
->iface
->search
+ ctxt
->iface
->search_len
,
282 ctxt
->iface
->search
, b
, sizeof(b
)) > 0)
283 fprintf(ctxt
->fp
, "\t%s.%s", ctxt
->c
->hostname
, b
);
285 fprintf(ctxt
->fp
, "\t%s\n", ctxt
->c
->hostname
);
286 md5_hash(ipbuf
, strlen(ipbuf
), &ctxt
->md5
);
287 md5_hash(ctxt
->c
->hostname
, strlen(ctxt
->c
->hostname
), &ctxt
->md5
);
290 ctxt
->buf_idx
+= snprintf(ctxt
->buf
+ ctxt
->buf_idx
,ctxt
->buf_len
- ctxt
->buf_idx
,
291 "%s/%d ", ipbuf
, prefix
);
294 void dhcpv6_ia_write_statefile(void)
296 struct write_ctxt ctxt
;
298 md5_begin(&ctxt
.md5
);
300 if (config
.dhcp_statefile
) {
301 time_t now
= odhcpd_time(), wall_time
= time(NULL
);
302 int fd
= open(config
.dhcp_statefile
, O_CREAT
| O_WRONLY
| O_CLOEXEC
, 0644);
308 ret
= lockf(fd
, F_LOCK
, 0);
313 if (ftruncate(fd
, 0) < 0) {}
315 ctxt
.fp
= fdopen(fd
, "w");
322 ctxt
.buf_len
= sizeof(leasebuf
);
324 avl_for_each_element(&interfaces
, ctxt
.iface
, avl
) {
325 if (ctxt
.iface
->dhcpv6
!= MODE_SERVER
&&
326 ctxt
.iface
->dhcpv4
!= MODE_SERVER
)
329 if (ctxt
.iface
->dhcpv6
== MODE_SERVER
&&
330 ctxt
.iface
->ia_assignments
.next
) {
331 list_for_each_entry(ctxt
.c
, &ctxt
.iface
->ia_assignments
, head
) {
332 if (!(ctxt
.c
->flags
& OAF_BOUND
) || ctxt
.c
->managed_size
< 0)
337 odhcpd_hexlify(duidbuf
, ctxt
.c
->clid_data
, ctxt
.c
->clid_len
);
339 /* iface DUID iaid hostname lifetime assigned length [addrs...] */
340 ctxt
.buf_idx
= snprintf(ctxt
.buf
, ctxt
.buf_len
, "# %s %s %x %s%s %ld %x %u ",
341 ctxt
.iface
->ifname
, duidbuf
, ntohl(ctxt
.c
->iaid
),
342 (ctxt
.c
->flags
& OAF_BROKEN_HOSTNAME
) ? "broken\\x20" : "",
343 (ctxt
.c
->hostname
? ctxt
.c
->hostname
: "-"),
344 (ctxt
.c
->valid_until
> now
?
345 (ctxt
.c
->valid_until
- now
+ wall_time
) :
346 (INFINITE_VALID(ctxt
.c
->valid_until
) ? -1 : 0)),
347 ctxt
.c
->assigned
, (unsigned)ctxt
.c
->length
);
349 if (INFINITE_VALID(ctxt
.c
->valid_until
) || ctxt
.c
->valid_until
> now
)
350 dhcpv6_ia_enum_addrs(ctxt
.iface
, ctxt
.c
, now
,
351 dhcpv6_write_ia_addr
, &ctxt
);
353 ctxt
.buf
[ctxt
.buf_idx
- 1] = '\n';
354 fwrite(ctxt
.buf
, 1, ctxt
.buf_idx
, ctxt
.fp
);
358 if (ctxt
.iface
->dhcpv4
== MODE_SERVER
&&
359 ctxt
.iface
->dhcpv4_assignments
.next
) {
360 struct dhcp_assignment
*c
;
361 list_for_each_entry(c
, &ctxt
.iface
->dhcpv4_assignments
, head
) {
362 if (!(c
->flags
& OAF_BOUND
))
365 char ipbuf
[INET6_ADDRSTRLEN
];
367 odhcpd_hexlify(duidbuf
, c
->hwaddr
, sizeof(c
->hwaddr
));
369 /* iface DUID iaid hostname lifetime assigned length [addrs...] */
370 ctxt
.buf_idx
= snprintf(ctxt
.buf
, ctxt
.buf_len
, "# %s %s ipv4 %s%s %ld %x 32 ",
371 ctxt
.iface
->ifname
, duidbuf
,
372 (c
->flags
& OAF_BROKEN_HOSTNAME
) ? "broken\\x20" : "",
373 (c
->hostname
? c
->hostname
: "-"),
374 (c
->valid_until
> now
?
375 (c
->valid_until
- now
+ wall_time
) :
376 (INFINITE_VALID(c
->valid_until
) ? -1 : 0)),
379 struct in_addr addr
= {.s_addr
= c
->addr
};
380 inet_ntop(AF_INET
, &addr
, ipbuf
, sizeof(ipbuf
) - 1);
382 if (c
->hostname
&& !(c
->flags
& OAF_BROKEN_HOSTNAME
)) {
383 fputs(ipbuf
, ctxt
.fp
);
386 if (dn_expand(ctxt
.iface
->search
,
387 ctxt
.iface
->search
+ ctxt
.iface
->search_len
,
388 ctxt
.iface
->search
, b
, sizeof(b
)) > 0)
389 fprintf(ctxt
.fp
, "\t%s.%s", c
->hostname
, b
);
391 fprintf(ctxt
.fp
, "\t%s\n", c
->hostname
);
392 md5_hash(ipbuf
, strlen(ipbuf
), &ctxt
.md5
);
393 md5_hash(c
->hostname
, strlen(c
->hostname
), &ctxt
.md5
);
396 ctxt
.buf_idx
+= snprintf(ctxt
.buf
+ ctxt
.buf_idx
,
397 ctxt
.buf_len
- ctxt
.buf_idx
,
399 ctxt
.buf
[ctxt
.buf_idx
- 1] = '\n';
400 fwrite(ctxt
.buf
, 1, ctxt
.buf_idx
, ctxt
.fp
);
409 md5_end(newmd5
, &ctxt
.md5
);
411 if (config
.dhcp_cb
&& memcmp(newmd5
, statemd5
, sizeof(newmd5
))) {
412 memcpy(statemd5
, newmd5
, sizeof(statemd5
));
413 char *argv
[2] = {config
.dhcp_cb
, NULL
};
415 execv(argv
[0], argv
);
421 static void __apply_lease(struct interface
*iface
, struct dhcp_assignment
*a
,
422 struct odhcpd_ipaddr
*addrs
, ssize_t addr_len
, bool add
)
427 for (ssize_t i
= 0; i
< addr_len
; ++i
) {
428 struct in6_addr prefix
= addrs
[i
].addr
.in6
;
429 prefix
.s6_addr32
[1] |= htonl(a
->assigned
);
430 prefix
.s6_addr32
[2] = prefix
.s6_addr32
[3] = 0;
431 netlink_setup_route(&prefix
, (a
->managed_size
) ? addrs
[i
].prefix
: a
->length
,
432 iface
->ifindex
, &a
->peer
.sin6_addr
, 1024, add
);
436 static void apply_lease(struct interface
*iface
, struct dhcp_assignment
*a
, bool add
)
438 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
439 ssize_t addrlen
= (a
->managed
) ? a
->managed_size
: (ssize_t
)iface
->addr6_len
;
441 __apply_lease(iface
, a
, addrs
, addrlen
, add
);
444 /* Set border assignment size based on the IPv6 address prefixes */
445 static void set_border_assignment_size(struct interface
*iface
, struct dhcp_assignment
*b
)
447 time_t now
= odhcpd_time();
450 for (size_t i
= 0; i
< iface
->addr6_len
; ++i
) {
451 if (iface
->addr6
[i
].preferred
> (uint32_t)now
&&
452 iface
->addr6
[i
].prefix
< 64 &&
453 iface
->addr6
[i
].prefix
> minprefix
)
454 minprefix
= iface
->addr6
[i
].prefix
;
457 if (minprefix
> 32 && minprefix
<= 64)
458 b
->assigned
= 1U << (64 - minprefix
);
463 /* More data was received from TCP connection */
464 static void managed_handle_pd_data(struct ustream
*s
, _unused
int bytes_new
)
466 struct ustream_fd
*fd
= container_of(s
, struct ustream_fd
, stream
);
467 struct dhcp_assignment
*c
= container_of(fd
, struct dhcp_assignment
, managed_sock
);
468 time_t now
= odhcpd_time();
469 bool first
= c
->managed_size
< 0;
473 char *data
= ustream_get_read_buf(s
, &pending
);
474 char *end
= memmem(data
, pending
, "\n\n", 2);
483 if (c
->accept_reconf
)
487 for (char *line
= strtok_r(data
, "\n", &saveptr
); line
; line
= strtok_r(NULL
, "\n", &saveptr
)) {
488 c
->managed
= realloc(c
->managed
, (c
->managed_size
+ 1) * sizeof(*c
->managed
));
489 struct odhcpd_ipaddr
*n
= &c
->managed
[c
->managed_size
];
491 char *saveptr2
, *x
= strtok_r(line
, "/", &saveptr2
);
492 if (!x
|| inet_pton(AF_INET6
, x
, &n
->addr
) < 1)
495 x
= strtok_r(NULL
, ",", &saveptr2
);
496 if (sscanf(x
, "%hhu", &n
->prefix
) < 1)
499 x
= strtok_r(NULL
, ",", &saveptr2
);
500 if (sscanf(x
, "%u", &n
->preferred
) < 1)
503 x
= strtok_r(NULL
, ",", &saveptr2
);
504 if (sscanf(x
, "%u", &n
->valid
) < 1)
507 if (n
->preferred
> n
->valid
)
510 if (UINT32_MAX
- now
< n
->preferred
)
511 n
->preferred
= UINT32_MAX
;
515 if (UINT32_MAX
- now
< n
->valid
)
516 n
->valid
= UINT32_MAX
;
525 ustream_consume(s
, end
- data
);
528 if (first
&& c
->managed_size
== 0)
530 else if (first
&& !(c
->flags
& OAF_STATIC
))
531 c
->valid_until
= now
+ 150;
535 /* TCP transmission has ended, either because of success or timeout or other error */
536 static void managed_handle_pd_done(struct ustream
*s
)
538 struct ustream_fd
*fd
= container_of(s
, struct ustream_fd
, stream
);
539 struct dhcp_assignment
*c
= container_of(fd
, struct dhcp_assignment
, managed_sock
);
541 if (!(c
->flags
& OAF_STATIC
))
542 c
->valid_until
= odhcpd_time() + 15;
546 if (c
->accept_reconf
)
550 static bool assign_pd(struct interface
*iface
, struct dhcp_assignment
*assign
)
552 struct dhcp_assignment
*c
;
554 if (iface
->dhcpv6_pd_manager
[0]) {
555 int fd
= usock(USOCK_UNIX
| USOCK_TCP
, iface
->dhcpv6_pd_manager
, NULL
);
557 struct pollfd pfd
= { .fd
= fd
, .events
= POLLIN
};
560 odhcpd_hexlify(iaidbuf
, assign
->clid_data
, assign
->clid_len
);
562 assign
->managed_sock
.stream
.notify_read
= managed_handle_pd_data
;
563 assign
->managed_sock
.stream
.notify_state
= managed_handle_pd_done
;
564 ustream_fd_init(&assign
->managed_sock
, fd
);
565 ustream_printf(&assign
->managed_sock
.stream
, "%s,%x\n::/%d,0,0\n\n",
566 iaidbuf
, assign
->iaid
, assign
->length
);
567 ustream_write_pending(&assign
->managed_sock
.stream
);
568 assign
->managed_size
= -1;
570 if (!(assign
->flags
& OAF_STATIC
))
571 assign
->valid_until
= odhcpd_time() + 15;
573 list_add(&assign
->head
, &iface
->ia_assignments
);
575 /* Wait initial period of up to 250ms for immediate assignment */
576 if (poll(&pfd
, 1, 250) < 0) {
577 syslog(LOG_ERR
, "poll(): %m");
581 managed_handle_pd_data(&assign
->managed_sock
.stream
, 0);
583 if (fcntl(fd
, F_GETFL
) >= 0 && assign
->managed_size
> 0)
588 } else if (iface
->addr6_len
< 1)
591 /* Try honoring the hint first */
592 uint32_t current
= 1, asize
= (1 << (64 - assign
->length
)) - 1;
593 if (assign
->assigned
) {
594 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
595 if (c
->length
== 128 || c
->length
== 0)
598 if (assign
->assigned
>= current
&& assign
->assigned
+ asize
< c
->assigned
) {
599 list_add_tail(&assign
->head
, &c
->head
);
601 if (assign
->flags
& OAF_BOUND
)
602 apply_lease(iface
, assign
, true);
607 if (c
->assigned
!= 0)
608 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
612 /* Fallback to a variable assignment */
614 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
615 if (c
->length
== 128 || c
->length
== 0)
618 current
= (current
+ asize
) & (~asize
);
619 if (current
+ asize
< c
->assigned
) {
620 assign
->assigned
= current
;
621 list_add_tail(&assign
->head
, &c
->head
);
623 if (assign
->flags
& OAF_BOUND
)
624 apply_lease(iface
, assign
, true);
629 if (c
->assigned
!= 0)
630 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
636 static bool assign_na(struct interface
*iface
, struct dhcp_assignment
*a
)
638 struct dhcp_assignment
*c
;
641 /* Preconfigured assignment by static lease */
643 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
647 if (c
->assigned
> a
->assigned
|| c
->length
!= 128) {
648 list_add_tail(&a
->head
, &c
->head
);
650 } else if (c
->assigned
== a
->assigned
)
655 /* Seed RNG with checksum of DUID */
656 for (size_t i
= 0; i
< a
->clid_len
; ++i
)
657 seed
+= a
->clid_data
[i
];
660 /* Try to assign up to 100x */
661 for (size_t i
= 0; i
< 100; ++i
) {
663 do try = ((uint32_t)rand()) % 0x0fff; while (try < 0x100);
665 if (config_find_lease_by_hostid(try))
668 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
672 if (c
->assigned
> try || c
->length
!= 128) {
674 list_add_tail(&a
->head
, &c
->head
);
676 } else if (c
->assigned
== try)
684 static void handle_addrlist_change(struct netevent_handler_info
*info
)
686 struct interface
*iface
= info
->iface
;
687 struct dhcp_assignment
*c
, *d
, *border
= list_last_entry(
688 &iface
->ia_assignments
, struct dhcp_assignment
, head
);
689 struct list_head reassign
= LIST_HEAD_INIT(reassign
);
690 time_t now
= odhcpd_time();
692 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
693 if (c
!= border
&& iface
->ra_managed
== RA_MANAGED_NO_MFLAG
694 && (c
->flags
& OAF_BOUND
))
695 __apply_lease(iface
, c
, info
->addrs_old
.addrs
,
696 info
->addrs_old
.len
, false);
699 set_border_assignment_size(iface
, border
);
701 list_for_each_entry_safe(c
, d
, &iface
->ia_assignments
, head
) {
702 if (c
->clid_len
== 0 || (!INFINITE_VALID(c
->valid_until
) && c
->valid_until
< now
) ||
706 if (c
->length
< 128 && c
->assigned
>= border
->assigned
&& c
!= border
)
707 list_move(&c
->head
, &reassign
);
708 else if (c
!= border
&& (c
->flags
& OAF_BOUND
))
709 apply_lease(iface
, c
, true);
711 if (c
->accept_reconf
&& c
->reconf_cnt
== 0) {
712 struct dhcp_assignment
*a
;
716 /* Leave all other assignments of that client alone */
717 list_for_each_entry(a
, &iface
->ia_assignments
, head
)
718 if (a
!= c
&& a
->clid_len
== c
->clid_len
&&
719 !memcmp(a
->clid_data
, c
->clid_data
, a
->clid_len
))
720 a
->reconf_cnt
= INT_MAX
;
724 while (!list_empty(&reassign
)) {
725 c
= list_first_entry(&reassign
, struct dhcp_assignment
, head
);
727 if (!assign_pd(iface
, c
)) {
729 list_add(&c
->head
, &iface
->ia_assignments
);
733 dhcpv6_ia_write_statefile();
736 static void reconf_timeout_cb(struct uloop_timeout
*event
)
738 struct dhcp_assignment
*a
= container_of(event
, struct dhcp_assignment
, reconf_timer
);
740 if (a
->reconf_cnt
> 0 && a
->reconf_cnt
< DHCPV6_REC_MAX_RC
) {
742 uloop_timeout_set(&a
->reconf_timer
,
743 DHCPV6_REC_TIMEOUT
<< a
->reconf_cnt
);
749 static void start_reconf(struct dhcp_assignment
*a
)
751 uloop_timeout_set(&a
->reconf_timer
,
752 DHCPV6_REC_TIMEOUT
<< a
->reconf_cnt
);
753 a
->reconf_timer
.cb
= reconf_timeout_cb
;
759 static void stop_reconf(struct dhcp_assignment
*a
)
761 uloop_timeout_cancel(&a
->reconf_timer
);
763 a
->reconf_timer
.cb
= NULL
;
766 static void valid_until_cb(struct uloop_timeout
*event
)
768 struct interface
*iface
;
769 time_t now
= odhcpd_time();
771 avl_for_each_element(&interfaces
, iface
, avl
) {
772 struct dhcp_assignment
*a
, *n
;
774 if (iface
->dhcpv6
!= MODE_SERVER
|| iface
->ia_assignments
.next
== NULL
)
777 list_for_each_entry_safe(a
, n
, &iface
->ia_assignments
, head
) {
778 if (!INFINITE_VALID(a
->valid_until
) && a
->valid_until
< now
) {
779 if ((a
->length
< 128 && a
->clid_len
> 0) ||
780 (a
->length
== 128 && a
->clid_len
== 0))
786 uloop_timeout_set(event
, 1000);
789 static size_t build_ia(uint8_t *buf
, size_t buflen
, uint16_t status
,
790 const struct dhcpv6_ia_hdr
*ia
, struct dhcp_assignment
*a
,
791 struct interface
*iface
, bool request
)
793 struct dhcpv6_ia_hdr o_ia
= {
800 size_t ia_len
= sizeof(o_ia
);
801 time_t now
= odhcpd_time();
807 struct __attribute__((packed
)) {
812 .type
= htons(DHCPV6_OPT_STATUS
),
813 .len
= htons(sizeof(o_status
) - 4),
814 .val
= htons(status
),
817 memcpy(buf
+ ia_len
, &o_status
, sizeof(o_status
));
818 ia_len
+= sizeof(o_status
);
820 o_ia
.len
= htons(ia_len
- 4);
821 memcpy(buf
, &o_ia
, sizeof(o_ia
));
830 leasetime
= a
->leasetime
;
832 leasetime
= iface
->dhcpv4_leasetime
;
834 uint32_t pref
= leasetime
;
835 uint32_t valid
= leasetime
;
837 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
838 size_t addrlen
= (a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
839 size_t m
= get_preferred_addr(addrs
, addrlen
);
841 for (size_t i
= 0; i
< addrlen
; ++i
) {
842 uint32_t prefix_pref
= addrs
[i
].preferred
;
843 uint32_t prefix_valid
= addrs
[i
].valid
;
845 if (!valid_addr(&addrs
[i
], now
))
848 if (prefix_pref
!= UINT32_MAX
)
851 if (prefix_valid
!= UINT32_MAX
)
854 if (a
->length
< 128) {
855 struct dhcpv6_ia_prefix o_ia_p
= {
856 .type
= htons(DHCPV6_OPT_IA_PREFIX
),
857 .len
= htons(sizeof(o_ia_p
) - 4),
858 .preferred
= htonl(prefix_pref
),
859 .valid
= htonl(prefix_valid
),
860 .prefix
= (a
->managed_size
) ? addrs
[i
].prefix
: a
->length
,
861 .addr
= addrs
[i
].addr
.in6
,
864 o_ia_p
.addr
.s6_addr32
[1] |= htonl(a
->assigned
);
865 o_ia_p
.addr
.s6_addr32
[2] = o_ia_p
.addr
.s6_addr32
[3] = 0;
867 if ((a
->assigned
== 0 && a
->managed_size
== 0) ||
868 !valid_prefix_length(a
, addrs
[i
].prefix
))
871 if (buflen
< ia_len
+ sizeof(o_ia_p
))
874 memcpy(buf
+ ia_len
, &o_ia_p
, sizeof(o_ia_p
));
875 ia_len
+= sizeof(o_ia_p
);
877 struct dhcpv6_ia_addr o_ia_a
= {
878 .type
= htons(DHCPV6_OPT_IA_ADDR
),
879 .len
= htons(sizeof(o_ia_a
) - 4),
880 .addr
= addrs
[i
].addr
.in6
,
881 .preferred
= htonl(prefix_pref
),
882 .valid
= htonl(prefix_valid
)
885 o_ia_a
.addr
.s6_addr32
[3] = htonl(a
->assigned
);
887 if (!ADDR_ENTRY_VALID_IA_ADDR(iface
, i
, m
, addrs
) ||
891 if (buflen
< ia_len
+ sizeof(o_ia_a
))
894 memcpy(buf
+ ia_len
, &o_ia_a
, sizeof(o_ia_a
));
895 ia_len
+= sizeof(o_ia_a
);
898 /* Calculate T1 / T2 based on non-deprecated addresses */
899 if (prefix_pref
> 0) {
900 if (prefix_pref
< pref
)
903 if (prefix_valid
< valid
)
904 valid
= prefix_valid
;
908 if (!INFINITE_VALID(a
->valid_until
))
909 /* UINT32_MAX is considered as infinite leasetime */
910 a
->valid_until
= (valid
== UINT32_MAX
) ? 0 : valid
+ now
;
912 o_ia
.t1
= htonl((pref
== UINT32_MAX
) ? pref
: pref
* 5 / 10);
913 o_ia
.t2
= htonl((pref
== UINT32_MAX
) ? pref
: pref
* 8 / 10);
923 uint8_t *odata
, *end
= ((uint8_t*)ia
) + htons(ia
->len
) + 4;
924 uint16_t otype
, olen
;
926 dhcpv6_for_each_option((uint8_t*)&ia
[1], end
, otype
, olen
, odata
) {
927 struct dhcpv6_ia_prefix
*ia_p
= (struct dhcpv6_ia_prefix
*)&odata
[-4];
928 struct dhcpv6_ia_addr
*ia_a
= (struct dhcpv6_ia_addr
*)&odata
[-4];
931 if ((otype
!= DHCPV6_OPT_IA_PREFIX
|| olen
< sizeof(*ia_p
) - 4) &&
932 (otype
!= DHCPV6_OPT_IA_ADDR
|| olen
< sizeof(*ia_a
) - 4))
936 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
937 size_t addrlen
= (a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
939 for (size_t i
= 0; i
< addrlen
; ++i
) {
940 if (!valid_addr(&addrs
[i
], now
))
943 struct in6_addr addr
= addrs
[i
].addr
.in6
;
944 if (ia
->type
== htons(DHCPV6_OPT_IA_PD
)) {
945 addr
.s6_addr32
[1] |= htonl(a
->assigned
);
946 addr
.s6_addr32
[2] = addr
.s6_addr32
[3] = 0;
948 if (!memcmp(&ia_p
->addr
, &addr
, sizeof(addr
)) &&
949 ia_p
->prefix
== ((a
->managed
) ? addrs
[i
].prefix
: a
->length
))
952 addr
.s6_addr32
[3] = htonl(a
->assigned
);
954 if (!memcmp(&ia_a
->addr
, &addr
, sizeof(addr
)))
961 if (otype
== DHCPV6_OPT_IA_PREFIX
) {
962 struct dhcpv6_ia_prefix o_ia_p
= {
963 .type
= htons(DHCPV6_OPT_IA_PREFIX
),
964 .len
= htons(sizeof(o_ia_p
) - 4),
967 .prefix
= ia_p
->prefix
,
971 if (buflen
< ia_len
+ sizeof(o_ia_p
))
974 memcpy(buf
+ ia_len
, &o_ia_p
, sizeof(o_ia_p
));
975 ia_len
+= sizeof(o_ia_p
);
977 struct dhcpv6_ia_addr o_ia_a
= {
978 .type
= htons(DHCPV6_OPT_IA_ADDR
),
979 .len
= htons(sizeof(o_ia_a
) - 4),
985 if (buflen
< ia_len
+ sizeof(o_ia_a
))
988 memcpy(buf
+ ia_len
, &o_ia_a
, sizeof(o_ia_a
));
989 ia_len
+= sizeof(o_ia_a
);
995 o_ia
.len
= htons(ia_len
- 4);
996 memcpy(buf
, &o_ia
, sizeof(o_ia
));
1006 static void dhcpv6_log_ia_addr(struct in6_addr
*addr
, int prefix
, _unused
uint32_t pref
,
1007 _unused
uint32_t valid
, void *arg
)
1009 struct log_ctxt
*ctxt
= (struct log_ctxt
*)arg
;
1010 char addrbuf
[INET6_ADDRSTRLEN
];
1012 inet_ntop(AF_INET6
, addr
, addrbuf
, sizeof(addrbuf
));
1013 ctxt
->buf_idx
+= snprintf(ctxt
->buf
+ ctxt
->buf_idx
, ctxt
->buf_len
- ctxt
->buf_idx
,
1014 "%s/%d ", addrbuf
, prefix
);
1017 static void dhcpv6_log(uint8_t msgtype
, struct interface
*iface
, time_t now
,
1018 const char *duidbuf
, bool is_pd
, struct dhcp_assignment
*a
, int code
)
1020 const char *type
= "UNKNOWN";
1021 const char *status
= "UNKNOWN";
1024 case DHCPV6_MSG_SOLICIT
:
1027 case DHCPV6_MSG_REQUEST
:
1030 case DHCPV6_MSG_CONFIRM
:
1033 case DHCPV6_MSG_RENEW
:
1036 case DHCPV6_MSG_REBIND
:
1039 case DHCPV6_MSG_RELEASE
:
1042 case DHCPV6_MSG_DECLINE
:
1048 case DHCPV6_STATUS_OK
:
1051 case DHCPV6_STATUS_NOADDRSAVAIL
:
1052 status
= "no addresses available";
1054 case DHCPV6_STATUS_NOBINDING
:
1055 status
= "no binding";
1057 case DHCPV6_STATUS_NOTONLINK
:
1058 status
= "not on-link";
1060 case DHCPV6_STATUS_NOPREFIXAVAIL
:
1061 status
= "no prefix available";
1065 char leasebuf
[256] = "";
1068 struct log_ctxt ctxt
= {.buf
= leasebuf
,
1069 .buf_len
= sizeof(leasebuf
),
1072 dhcpv6_ia_enum_addrs(iface
, a
, now
, dhcpv6_log_ia_addr
, &ctxt
);
1075 syslog(LOG_NOTICE
, "DHCPV6 %s %s from %s on %s: %s %s", type
, (is_pd
) ? "IA_PD" : "IA_NA",
1076 duidbuf
, iface
->name
, status
, leasebuf
);
1079 static bool dhcpv6_ia_on_link(const struct dhcpv6_ia_hdr
*ia
, struct dhcp_assignment
*a
,
1080 struct interface
*iface
)
1082 struct odhcpd_ipaddr
*addrs
= (a
&& a
->managed
) ? a
->managed
: iface
->addr6
;
1083 size_t addrlen
= (a
&& a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
1084 time_t now
= odhcpd_time();
1085 uint8_t *odata
, *end
= ((uint8_t*)ia
) + htons(ia
->len
) + 4;
1086 uint16_t otype
, olen
;
1089 dhcpv6_for_each_option((uint8_t*)&ia
[1], end
, otype
, olen
, odata
) {
1090 struct dhcpv6_ia_prefix
*p
= (struct dhcpv6_ia_prefix
*)&odata
[-4];
1091 struct dhcpv6_ia_addr
*n
= (struct dhcpv6_ia_addr
*)&odata
[-4];
1093 if ((otype
!= DHCPV6_OPT_IA_PREFIX
|| olen
< sizeof(*p
) - 4) &&
1094 (otype
!= DHCPV6_OPT_IA_ADDR
|| olen
< sizeof(*n
) - 4))
1098 for (size_t i
= 0; i
< addrlen
; ++i
) {
1099 if (!valid_addr(&addrs
[i
], now
))
1102 if (ia
->type
== htons(DHCPV6_OPT_IA_PD
)) {
1103 if (p
->prefix
< addrs
[i
].prefix
||
1104 odhcpd_bmemcmp(&p
->addr
, &addrs
[i
].addr
.in6
, addrs
[i
].prefix
))
1107 } else if (odhcpd_bmemcmp(&n
->addr
, &addrs
[i
].addr
.in6
, addrs
[i
].prefix
))
1120 ssize_t
dhcpv6_ia_handle_IAs(uint8_t *buf
, size_t buflen
, struct interface
*iface
,
1121 const struct sockaddr_in6
*addr
, const void *data
, const uint8_t *end
)
1124 struct dhcp_assignment
*first
= NULL
;
1125 const struct dhcpv6_client_header
*hdr
= data
;
1126 time_t now
= odhcpd_time();
1127 uint16_t otype
, olen
, clid_len
= 0;
1128 uint8_t *start
= (uint8_t *)&hdr
[1], *odata
;
1129 uint8_t *clid_data
= NULL
, mac
[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1130 size_t hostname_len
= 0, response_len
= 0;
1131 bool notonlink
= false, rapid_commit
= false, accept_reconf
= false;
1132 char duidbuf
[261], hostname
[256];
1134 dhcpv6_for_each_option(start
, end
, otype
, olen
, odata
) {
1135 if (otype
== DHCPV6_OPT_CLIENTID
) {
1139 if (olen
== 14 && odata
[0] == 0 && odata
[1] == 1)
1140 memcpy(mac
, &odata
[8], sizeof(mac
));
1141 else if (olen
== 10 && odata
[0] == 0 && odata
[1] == 3)
1142 memcpy(mac
, &odata
[4], sizeof(mac
));
1145 odhcpd_hexlify(duidbuf
, odata
, olen
);
1146 } else if (otype
== DHCPV6_OPT_FQDN
&& olen
>= 2 && olen
<= 255) {
1147 uint8_t fqdn_buf
[256];
1148 memcpy(fqdn_buf
, odata
, olen
);
1149 fqdn_buf
[olen
++] = 0;
1151 if (dn_expand(&fqdn_buf
[1], &fqdn_buf
[olen
], &fqdn_buf
[1], hostname
, sizeof(hostname
)) > 0)
1152 hostname_len
= strcspn(hostname
, ".");
1153 } else if (otype
== DHCPV6_OPT_RECONF_ACCEPT
)
1154 accept_reconf
= true;
1155 else if (otype
== DHCPV6_OPT_RAPID_COMMIT
&& hdr
->msg_type
== DHCPV6_MSG_SOLICIT
)
1156 rapid_commit
= true;
1159 if (!clid_data
|| !clid_len
|| clid_len
> 130)
1162 l
= config_find_lease_by_duid(clid_data
, clid_len
);
1164 l
= config_find_lease_by_mac(mac
);
1166 dhcpv6_for_each_option(start
, end
, otype
, olen
, odata
) {
1167 bool is_pd
= (otype
== DHCPV6_OPT_IA_PD
);
1168 bool is_na
= (otype
== DHCPV6_OPT_IA_NA
);
1169 bool ia_addr_present
= false;
1170 if (!is_pd
&& !is_na
)
1173 struct dhcpv6_ia_hdr
*ia
= (struct dhcpv6_ia_hdr
*)&odata
[-4];
1174 size_t ia_response_len
= 0;
1175 uint8_t reqlen
= (is_pd
) ? 62 : 128;
1176 uint32_t reqhint
= 0;
1178 /* Parse request hint for IA-PD */
1181 uint16_t stype
, slen
;
1182 dhcpv6_for_each_option(&ia
[1], odata
+ olen
, stype
, slen
, sdata
) {
1183 if (stype
!= DHCPV6_OPT_IA_PREFIX
|| slen
< sizeof(struct dhcpv6_ia_prefix
) - 4)
1186 struct dhcpv6_ia_prefix
*p
= (struct dhcpv6_ia_prefix
*)&sdata
[-4];
1189 reqhint
= ntohl(p
->addr
.s6_addr32
[1]);
1190 if (reqlen
> 32 && reqlen
<= 64)
1191 reqhint
&= (1U << (64 - reqlen
)) - 1;
1199 uint16_t stype
, slen
;
1200 dhcpv6_for_each_option(&ia
[1], odata
+ olen
, stype
, slen
, sdata
) {
1201 if (stype
!= DHCPV6_OPT_IA_ADDR
|| slen
< sizeof(struct dhcpv6_ia_addr
) - 4)
1204 ia_addr_present
= true;
1208 /* Find assignment */
1209 struct dhcp_assignment
*c
, *a
= NULL
;
1210 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
1211 if ((c
->clid_len
== clid_len
&& !memcmp(c
->clid_data
, clid_data
, clid_len
)) &&
1212 c
->iaid
== ia
->iaid
&& (INFINITE_VALID(c
->valid_until
) || now
< c
->valid_until
) &&
1213 ((is_pd
&& c
->length
<= 64) || (is_na
&& c
->length
== 128))) {
1217 if (a
->flags
& OAF_BOUND
)
1218 apply_lease(iface
, a
, false);
1225 if (l
&& a
&& a
->lease
!= l
) {
1230 /* Generic message handling */
1231 uint16_t status
= DHCPV6_STATUS_OK
;
1232 if (a
&& a
->managed_size
< 0)
1235 if (hdr
->msg_type
== DHCPV6_MSG_SOLICIT
||
1236 hdr
->msg_type
== DHCPV6_MSG_REQUEST
||
1237 (hdr
->msg_type
== DHCPV6_MSG_REBIND
&& !a
)) {
1238 bool assigned
= !!a
;
1241 if ((!iface
->no_dynamic_dhcp
|| (l
&& is_na
)) &&
1242 (iface
->dhcpv6_pd
|| iface
->dhcpv6_na
)) {
1243 /* Create new binding */
1244 a
= calloc(1, sizeof(*a
) + clid_len
);
1247 a
->clid_len
= clid_len
;
1248 memcpy(a
->clid_data
, clid_data
, clid_len
);
1252 a
->assigned
= is_na
&& l
? l
->hostid
: reqhint
;
1253 /* Set valid time to 0 for static lease indicating */
1254 /* infinite lifetime otherwise current time */
1255 a
->valid_until
= l
? 0 : now
;
1256 a
->dhcp_free_cb
= dhcpv6_ia_free_assignment
;
1258 a
->flags
= OAF_DHCPV6
;
1261 memcpy(a
->key
, first
->key
, sizeof(a
->key
));
1263 odhcpd_urandom(a
->key
, sizeof(a
->key
));
1265 if (is_pd
&& iface
->dhcpv6_pd
)
1266 while (!(assigned
= assign_pd(iface
, a
)) &&
1267 !a
->managed_size
&& ++a
->length
<= 64);
1268 else if (is_na
&& iface
->dhcpv6_na
)
1269 assigned
= assign_na(iface
, a
);
1271 if (l
&& assigned
) {
1272 a
->flags
|= OAF_STATIC
;
1275 a
->hostname
= strdup(l
->hostname
);
1278 a
->leasetime
= l
->leasetime
;
1280 list_add(&a
->lease_list
, &l
->assignments
);
1284 if (a
->managed_size
&& !assigned
)
1290 if (!assigned
|| iface
->addr6_len
== 0)
1291 /* Set error status */
1292 status
= (is_pd
) ? DHCPV6_STATUS_NOPREFIXAVAIL
: DHCPV6_STATUS_NOADDRSAVAIL
;
1293 else if (hdr
->msg_type
== DHCPV6_MSG_REQUEST
&& !dhcpv6_ia_on_link(ia
, a
, iface
)) {
1294 /* Send NOTONLINK staus for the IA */
1295 status
= DHCPV6_STATUS_NOTONLINK
;
1297 } else if (accept_reconf
&& assigned
&& !first
&&
1298 hdr
->msg_type
!= DHCPV6_MSG_REBIND
) {
1299 size_t handshake_len
= 4;
1301 buf
[1] = DHCPV6_OPT_RECONF_ACCEPT
;
1305 if (hdr
->msg_type
== DHCPV6_MSG_REQUEST
) {
1306 struct dhcpv6_auth_reconfigure auth
= {
1307 htons(DHCPV6_OPT_AUTH
),
1308 htons(sizeof(auth
) - 4),
1310 {htonl(time(NULL
)), htonl(++serial
)},
1314 memcpy(auth
.key
, a
->key
, sizeof(a
->key
));
1315 memcpy(buf
+ handshake_len
, &auth
, sizeof(auth
));
1316 handshake_len
+= sizeof(auth
);
1320 buf
+= handshake_len
;
1321 buflen
-= handshake_len
;
1322 response_len
+= handshake_len
;
1327 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
,
1328 hdr
->msg_type
== DHCPV6_MSG_REBIND
? false : true);
1330 /* Was only a solicitation: mark binding for removal */
1331 if (assigned
&& hdr
->msg_type
== DHCPV6_MSG_SOLICIT
&& !rapid_commit
) {
1332 a
->flags
&= ~OAF_BOUND
;
1333 a
->flags
|= OAF_TENTATIVE
;
1335 if (!(a
->flags
& OAF_STATIC
))
1336 /* Keep tentative assignment around for 60 seconds */
1337 a
->valid_until
= now
+ 60;
1339 } else if (assigned
&&
1340 ((hdr
->msg_type
== DHCPV6_MSG_SOLICIT
&& rapid_commit
) ||
1341 hdr
->msg_type
== DHCPV6_MSG_REQUEST
||
1342 hdr
->msg_type
== DHCPV6_MSG_REBIND
)) {
1343 if ((!(a
->flags
& OAF_STATIC
) || !a
->hostname
) && hostname_len
> 0) {
1344 a
->hostname
= realloc(a
->hostname
, hostname_len
+ 1);
1346 memcpy(a
->hostname
, hostname
, hostname_len
);
1347 a
->hostname
[hostname_len
] = 0;
1349 if (odhcpd_valid_hostname(a
->hostname
))
1350 a
->flags
&= ~OAF_BROKEN_HOSTNAME
;
1352 a
->flags
|= OAF_BROKEN_HOSTNAME
;
1355 a
->accept_reconf
= accept_reconf
;
1356 a
->flags
&= ~OAF_TENTATIVE
;
1357 a
->flags
|= OAF_BOUND
;
1358 apply_lease(iface
, a
, true);
1359 } else if (!assigned
&& a
&& a
->managed_size
== 0) {
1360 /* Cleanup failed assignment */
1364 } else if (hdr
->msg_type
== DHCPV6_MSG_RENEW
||
1365 hdr
->msg_type
== DHCPV6_MSG_RELEASE
||
1366 hdr
->msg_type
== DHCPV6_MSG_REBIND
||
1367 hdr
->msg_type
== DHCPV6_MSG_DECLINE
) {
1368 if (!a
&& hdr
->msg_type
!= DHCPV6_MSG_REBIND
) {
1369 status
= DHCPV6_STATUS_NOBINDING
;
1370 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
, false);
1371 } else if (hdr
->msg_type
== DHCPV6_MSG_RENEW
||
1372 hdr
->msg_type
== DHCPV6_MSG_REBIND
) {
1373 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
, false);
1375 a
->flags
|= OAF_BOUND
;
1376 apply_lease(iface
, a
, true);
1378 } else if (hdr
->msg_type
== DHCPV6_MSG_RELEASE
) {
1379 if (!(a
->flags
& OAF_STATIC
))
1380 a
->valid_until
= now
- 1;
1382 if (a
->flags
& OAF_BOUND
) {
1383 apply_lease(iface
, a
, false);
1384 a
->flags
&= ~OAF_BOUND
;
1386 } else if (hdr
->msg_type
== DHCPV6_MSG_DECLINE
&& a
->length
== 128) {
1387 a
->flags
&= ~OAF_BOUND
;
1389 if (!(a
->flags
& OAF_STATIC
)) {
1391 a
->valid_until
= now
+ 3600; /* Block address for 1h */
1394 } else if (hdr
->msg_type
== DHCPV6_MSG_CONFIRM
) {
1395 if (ia_addr_present
&& !dhcpv6_ia_on_link(ia
, a
, iface
)) {
1400 if (!ia_addr_present
|| !a
|| !(a
->flags
& OAF_BOUND
)) {
1406 buf
+= ia_response_len
;
1407 buflen
-= ia_response_len
;
1408 response_len
+= ia_response_len
;
1409 dhcpv6_log(hdr
->msg_type
, iface
, now
, duidbuf
, is_pd
, a
, status
);
1412 switch (hdr
->msg_type
) {
1413 case DHCPV6_MSG_RELEASE
:
1414 case DHCPV6_MSG_DECLINE
:
1415 case DHCPV6_MSG_CONFIRM
:
1416 if (response_len
+ 6 < buflen
) {
1418 buf
[1] = DHCPV6_OPT_STATUS
;
1422 buf
[5] = (notonlink
) ? DHCPV6_STATUS_NOTONLINK
: DHCPV6_STATUS_OK
;
1431 dhcpv6_ia_write_statefile();
1434 return response_len
;