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 apply_lease(struct dhcp_assignment
*a
, bool add
);
44 static void set_border_assignment_size(struct interface
*iface
, struct dhcp_assignment
*b
);
45 static void handle_addrlist_change(struct netevent_handler_info
*info
);
46 static void start_reconf(struct dhcp_assignment
*a
);
47 static void stop_reconf(struct dhcp_assignment
*a
);
48 static void valid_until_cb(struct uloop_timeout
*event
);
50 static struct netevent_handler dhcpv6_netevent_handler
= { .cb
= dhcpv6_netevent_cb
, };
51 static struct uloop_timeout valid_until_timeout
= {.cb
= valid_until_cb
};
52 static uint32_t serial
= 0;
53 static uint8_t statemd5
[16];
55 int dhcpv6_ia_init(void)
57 uloop_timeout_set(&valid_until_timeout
, 1000);
59 netlink_add_netevent_handler(&dhcpv6_netevent_handler
);
64 int dhcpv6_ia_setup_interface(struct interface
*iface
, bool enable
)
66 enable
= enable
&& (iface
->dhcpv6
== MODE_SERVER
);
69 struct dhcp_assignment
*border
;
71 if (list_empty(&iface
->ia_assignments
)) {
72 border
= alloc_assignment(0);
75 syslog(LOG_WARNING
, "Failed to alloc border on %s", iface
->name
);
80 list_add(&border
->head
, &iface
->ia_assignments
);
82 border
= list_last_entry(&iface
->ia_assignments
, struct dhcp_assignment
, head
);
84 set_border_assignment_size(iface
, border
);
86 struct dhcp_assignment
*c
;
88 while (!list_empty(&iface
->ia_assignments
)) {
89 c
= list_first_entry(&iface
->ia_assignments
, struct dhcp_assignment
, head
);
98 static void dhcpv6_netevent_cb(unsigned long event
, struct netevent_handler_info
*info
)
100 struct interface
*iface
= info
->iface
;
102 if (!iface
|| iface
->dhcpv6
!= MODE_SERVER
)
106 case NETEV_ADDR6LIST_CHANGE
:
107 handle_addrlist_change(info
);
115 static inline bool valid_prefix_length(const struct dhcp_assignment
*a
, const uint8_t prefix_length
)
117 return (a
->managed_size
|| a
->length
> prefix_length
);
120 static inline bool valid_addr(const struct odhcpd_ipaddr
*addr
, time_t now
)
122 return (addr
->prefix
<= 96 && addr
->preferred
> (uint32_t)now
);
125 static size_t get_preferred_addr(const struct odhcpd_ipaddr
*addrs
, const size_t addrlen
)
129 for (i
= 0, m
= 0; i
< addrlen
; ++i
) {
130 if (addrs
[i
].preferred
> addrs
[m
].preferred
||
131 (addrs
[i
].preferred
== addrs
[m
].preferred
&&
132 memcmp(&addrs
[i
].addr
, &addrs
[m
].addr
, 16) > 0))
139 static int send_reconf(struct dhcp_assignment
*assign
)
142 struct dhcpv6_client_header hdr
;
146 uint16_t hardware_type
;
151 struct dhcpv6_auth_reconfigure auth
;
154 uint8_t clid_data
[128];
155 } __attribute__((packed
)) reconf_msg
= {
156 .hdr
= {DHCPV6_MSG_RECONFIGURE
, {0, 0, 0}},
157 .srvid_type
= htons(DHCPV6_OPT_SERVERID
),
158 .srvid_len
= htons(10),
159 .duid_type
= htons(3),
160 .hardware_type
= htons(1),
161 .msg_type
= htons(DHCPV6_OPT_RECONF_MSG
),
163 .msg_id
= DHCPV6_MSG_RENEW
,
164 .auth
= {htons(DHCPV6_OPT_AUTH
),
165 htons(sizeof(reconf_msg
.auth
) - 4), 3, 1, 0,
166 {htonl(time(NULL
)), htonl(++serial
)}, 2, {0}},
167 .clid_type
= htons(DHCPV6_OPT_CLIENTID
),
168 .clid_len
= htons(assign
->clid_len
),
171 struct interface
*iface
= assign
->iface
;
173 odhcpd_get_mac(iface
, reconf_msg
.mac
);
174 memcpy(reconf_msg
.clid_data
, assign
->clid_data
, assign
->clid_len
);
175 struct iovec iov
= {&reconf_msg
, sizeof(reconf_msg
) - 128 + assign
->clid_len
};
178 uint8_t secretbytes
[64];
179 memset(secretbytes
, 0, sizeof(secretbytes
));
180 memcpy(secretbytes
, assign
->key
, sizeof(assign
->key
));
182 for (size_t i
= 0; i
< sizeof(secretbytes
); ++i
)
183 secretbytes
[i
] ^= 0x36;
186 md5_hash(secretbytes
, sizeof(secretbytes
), &md5
);
187 md5_hash(iov
.iov_base
, iov
.iov_len
, &md5
);
188 md5_end(reconf_msg
.auth
.key
, &md5
);
190 for (size_t i
= 0; i
< sizeof(secretbytes
); ++i
) {
191 secretbytes
[i
] ^= 0x36;
192 secretbytes
[i
] ^= 0x5c;
196 md5_hash(secretbytes
, sizeof(secretbytes
), &md5
);
197 md5_hash(reconf_msg
.auth
.key
, 16, &md5
);
198 md5_end(reconf_msg
.auth
.key
, &md5
);
200 return odhcpd_send(iface
->dhcpv6_event
.uloop
.fd
, &assign
->peer
, &iov
, 1, iface
);
203 static void dhcpv6_ia_free_assignment(struct dhcp_assignment
*a
)
205 if (a
->managed_sock
.fd
.registered
) {
206 ustream_free(&a
->managed_sock
.stream
);
207 close(a
->managed_sock
.fd
.fd
);
210 if ((a
->flags
& OAF_BOUND
) && (a
->flags
& OAF_DHCPV6_PD
))
211 apply_lease(a
, false);
219 void dhcpv6_ia_enum_addrs(struct interface
*iface
, struct dhcp_assignment
*c
,
220 time_t now
, dhcpv6_binding_cb_handler_t func
, void *arg
)
222 struct odhcpd_ipaddr
*addrs
= (c
->managed
) ? c
->managed
: iface
->addr6
;
223 size_t addrlen
= (c
->managed
) ? (size_t)c
->managed_size
: iface
->addr6_len
;
224 size_t m
= get_preferred_addr(addrs
, addrlen
);
226 for (size_t i
= 0; i
< addrlen
; ++i
) {
227 struct in6_addr addr
;
228 uint32_t pref
, valid
;
229 int prefix
= c
->managed
? addrs
[i
].prefix
: c
->length
;
231 if (!valid_addr(&addrs
[i
], now
))
234 addr
= addrs
[i
].addr
.in6
;
235 pref
= addrs
[i
].preferred
;
236 valid
= addrs
[i
].valid
;
238 if (!ADDR_ENTRY_VALID_IA_ADDR(iface
, i
, m
, addrs
))
241 addr
.s6_addr32
[3] = htonl(c
->assigned
);
243 if (!valid_prefix_length(c
, addrs
[i
].prefix
))
246 addr
.s6_addr32
[1] |= htonl(c
->assigned
);
247 addr
.s6_addr32
[2] = addr
.s6_addr32
[3] = 0;
250 if (pref
!= UINT32_MAX
)
253 if (valid
!= UINT32_MAX
)
256 func(&addr
, prefix
, pref
, valid
, arg
);
263 struct dhcp_assignment
*c
;
264 struct interface
*iface
;
270 static void dhcpv6_write_ia_addr(struct in6_addr
*addr
, int prefix
, _unused
uint32_t pref
,
271 _unused
uint32_t valid
, void *arg
)
273 struct write_ctxt
*ctxt
= (struct write_ctxt
*)arg
;
274 char ipbuf
[INET6_ADDRSTRLEN
];
276 inet_ntop(AF_INET6
, addr
, ipbuf
, sizeof(ipbuf
) - 1);
278 if ((ctxt
->c
->flags
& OAF_DHCPV6_NA
) && ctxt
->c
->hostname
&&
279 !(ctxt
->c
->flags
& OAF_BROKEN_HOSTNAME
)) {
280 fputs(ipbuf
, ctxt
->fp
);
283 if (dn_expand(ctxt
->iface
->search
, ctxt
->iface
->search
+ ctxt
->iface
->search_len
,
284 ctxt
->iface
->search
, b
, sizeof(b
)) > 0)
285 fprintf(ctxt
->fp
, "\t%s.%s", ctxt
->c
->hostname
, b
);
287 fprintf(ctxt
->fp
, "\t%s\n", ctxt
->c
->hostname
);
288 md5_hash(ipbuf
, strlen(ipbuf
), &ctxt
->md5
);
289 md5_hash(ctxt
->c
->hostname
, strlen(ctxt
->c
->hostname
), &ctxt
->md5
);
292 ctxt
->buf_idx
+= snprintf(ctxt
->buf
+ ctxt
->buf_idx
,ctxt
->buf_len
- ctxt
->buf_idx
,
293 "%s/%d ", ipbuf
, prefix
);
296 void dhcpv6_ia_write_statefile(void)
298 struct write_ctxt ctxt
;
300 md5_begin(&ctxt
.md5
);
302 if (config
.dhcp_statefile
) {
303 time_t now
= odhcpd_time(), wall_time
= time(NULL
);
304 int fd
= open(config
.dhcp_statefile
, O_CREAT
| O_WRONLY
| O_CLOEXEC
, 0644);
310 ret
= lockf(fd
, F_LOCK
, 0);
315 if (ftruncate(fd
, 0) < 0) {}
317 ctxt
.fp
= fdopen(fd
, "w");
324 ctxt
.buf_len
= sizeof(leasebuf
);
326 avl_for_each_element(&interfaces
, ctxt
.iface
, avl
) {
327 if (ctxt
.iface
->dhcpv6
!= MODE_SERVER
&&
328 ctxt
.iface
->dhcpv4
!= MODE_SERVER
)
331 if (ctxt
.iface
->dhcpv6
== MODE_SERVER
) {
332 list_for_each_entry(ctxt
.c
, &ctxt
.iface
->ia_assignments
, head
) {
333 if (!(ctxt
.c
->flags
& OAF_BOUND
) || ctxt
.c
->managed_size
< 0)
338 odhcpd_hexlify(duidbuf
, ctxt
.c
->clid_data
, ctxt
.c
->clid_len
);
340 /* iface DUID iaid hostname lifetime assigned length [addrs...] */
341 ctxt
.buf_idx
= snprintf(ctxt
.buf
, ctxt
.buf_len
, "# %s %s %x %s%s %ld %x %u ",
342 ctxt
.iface
->ifname
, duidbuf
, ntohl(ctxt
.c
->iaid
),
343 (ctxt
.c
->flags
& OAF_BROKEN_HOSTNAME
) ? "broken\\x20" : "",
344 (ctxt
.c
->hostname
? ctxt
.c
->hostname
: "-"),
345 (ctxt
.c
->valid_until
> now
?
346 (ctxt
.c
->valid_until
- now
+ wall_time
) :
347 (INFINITE_VALID(ctxt
.c
->valid_until
) ? -1 : 0)),
348 ctxt
.c
->assigned
, (unsigned)ctxt
.c
->length
);
350 if (INFINITE_VALID(ctxt
.c
->valid_until
) || ctxt
.c
->valid_until
> now
)
351 dhcpv6_ia_enum_addrs(ctxt
.iface
, ctxt
.c
, now
,
352 dhcpv6_write_ia_addr
, &ctxt
);
354 ctxt
.buf
[ctxt
.buf_idx
- 1] = '\n';
355 fwrite(ctxt
.buf
, 1, ctxt
.buf_idx
, ctxt
.fp
);
359 if (ctxt
.iface
->dhcpv4
== MODE_SERVER
) {
360 struct dhcp_assignment
*c
;
362 list_for_each_entry(c
, &ctxt
.iface
->dhcpv4_assignments
, head
) {
363 if (!(c
->flags
& OAF_BOUND
))
366 char ipbuf
[INET6_ADDRSTRLEN
];
368 odhcpd_hexlify(duidbuf
, c
->hwaddr
, sizeof(c
->hwaddr
));
370 /* iface DUID iaid hostname lifetime assigned length [addrs...] */
371 ctxt
.buf_idx
= snprintf(ctxt
.buf
, ctxt
.buf_len
, "# %s %s ipv4 %s%s %ld %x 32 ",
372 ctxt
.iface
->ifname
, duidbuf
,
373 (c
->flags
& OAF_BROKEN_HOSTNAME
) ? "broken\\x20" : "",
374 (c
->hostname
? c
->hostname
: "-"),
375 (c
->valid_until
> now
?
376 (c
->valid_until
- now
+ wall_time
) :
377 (INFINITE_VALID(c
->valid_until
) ? -1 : 0)),
380 struct in_addr addr
= {.s_addr
= c
->addr
};
381 inet_ntop(AF_INET
, &addr
, ipbuf
, sizeof(ipbuf
) - 1);
383 if (c
->hostname
&& !(c
->flags
& OAF_BROKEN_HOSTNAME
)) {
384 fputs(ipbuf
, ctxt
.fp
);
387 if (dn_expand(ctxt
.iface
->search
,
388 ctxt
.iface
->search
+ ctxt
.iface
->search_len
,
389 ctxt
.iface
->search
, b
, sizeof(b
)) > 0)
390 fprintf(ctxt
.fp
, "\t%s.%s", c
->hostname
, b
);
392 fprintf(ctxt
.fp
, "\t%s\n", c
->hostname
);
393 md5_hash(ipbuf
, strlen(ipbuf
), &ctxt
.md5
);
394 md5_hash(c
->hostname
, strlen(c
->hostname
), &ctxt
.md5
);
397 ctxt
.buf_idx
+= snprintf(ctxt
.buf
+ ctxt
.buf_idx
,
398 ctxt
.buf_len
- ctxt
.buf_idx
,
400 ctxt
.buf
[ctxt
.buf_idx
- 1] = '\n';
401 fwrite(ctxt
.buf
, 1, ctxt
.buf_idx
, ctxt
.fp
);
410 md5_end(newmd5
, &ctxt
.md5
);
412 if (config
.dhcp_cb
&& memcmp(newmd5
, statemd5
, sizeof(newmd5
))) {
413 memcpy(statemd5
, newmd5
, sizeof(statemd5
));
414 char *argv
[2] = {config
.dhcp_cb
, NULL
};
416 execv(argv
[0], argv
);
422 static void __apply_lease(struct dhcp_assignment
*a
,
423 struct odhcpd_ipaddr
*addrs
, ssize_t addr_len
, bool add
)
425 if (a
->flags
& OAF_DHCPV6_NA
)
428 for (ssize_t i
= 0; i
< addr_len
; ++i
) {
429 struct in6_addr prefix
= addrs
[i
].addr
.in6
;
430 prefix
.s6_addr32
[1] |= htonl(a
->assigned
);
431 prefix
.s6_addr32
[2] = prefix
.s6_addr32
[3] = 0;
432 netlink_setup_route(&prefix
, (a
->managed_size
) ? addrs
[i
].prefix
: a
->length
,
433 a
->iface
->ifindex
, &a
->peer
.sin6_addr
, 1024, add
);
437 static void apply_lease(struct dhcp_assignment
*a
, bool add
)
439 struct interface
*iface
= a
->iface
;
440 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
441 ssize_t addrlen
= (a
->managed
) ? a
->managed_size
: (ssize_t
)iface
->addr6_len
;
443 __apply_lease(a
, addrs
, addrlen
, add
);
446 /* Set border assignment size based on the IPv6 address prefixes */
447 static void set_border_assignment_size(struct interface
*iface
, struct dhcp_assignment
*b
)
449 time_t now
= odhcpd_time();
452 for (size_t i
= 0; i
< iface
->addr6_len
; ++i
) {
453 if (iface
->addr6
[i
].preferred
> (uint32_t)now
&&
454 iface
->addr6
[i
].prefix
< 64 &&
455 iface
->addr6
[i
].prefix
> minprefix
)
456 minprefix
= iface
->addr6
[i
].prefix
;
459 if (minprefix
> 32 && minprefix
<= 64)
460 b
->assigned
= 1U << (64 - minprefix
);
465 /* More data was received from TCP connection */
466 static void managed_handle_pd_data(struct ustream
*s
, _unused
int bytes_new
)
468 struct ustream_fd
*fd
= container_of(s
, struct ustream_fd
, stream
);
469 struct dhcp_assignment
*c
= container_of(fd
, struct dhcp_assignment
, managed_sock
);
470 time_t now
= odhcpd_time();
471 bool first
= c
->managed_size
< 0;
475 char *data
= ustream_get_read_buf(s
, &pending
);
476 char *end
= memmem(data
, pending
, "\n\n", 2);
485 if (c
->accept_reconf
)
489 for (char *line
= strtok_r(data
, "\n", &saveptr
); line
; line
= strtok_r(NULL
, "\n", &saveptr
)) {
490 c
->managed
= realloc(c
->managed
, (c
->managed_size
+ 1) * sizeof(*c
->managed
));
491 struct odhcpd_ipaddr
*n
= &c
->managed
[c
->managed_size
];
493 char *saveptr2
, *x
= strtok_r(line
, "/", &saveptr2
);
494 if (!x
|| inet_pton(AF_INET6
, x
, &n
->addr
) < 1)
497 x
= strtok_r(NULL
, ",", &saveptr2
);
498 if (sscanf(x
, "%hhu", &n
->prefix
) < 1)
501 x
= strtok_r(NULL
, ",", &saveptr2
);
502 if (sscanf(x
, "%u", &n
->preferred
) < 1)
505 x
= strtok_r(NULL
, ",", &saveptr2
);
506 if (sscanf(x
, "%u", &n
->valid
) < 1)
509 if (n
->preferred
> n
->valid
)
512 if (UINT32_MAX
- now
< n
->preferred
)
513 n
->preferred
= UINT32_MAX
;
517 if (UINT32_MAX
- now
< n
->valid
)
518 n
->valid
= UINT32_MAX
;
527 ustream_consume(s
, end
- data
);
530 if (first
&& c
->managed_size
== 0)
532 else if (first
&& !(c
->flags
& OAF_STATIC
))
533 c
->valid_until
= now
+ 150;
537 /* TCP transmission has ended, either because of success or timeout or other error */
538 static void managed_handle_pd_done(struct ustream
*s
)
540 struct ustream_fd
*fd
= container_of(s
, struct ustream_fd
, stream
);
541 struct dhcp_assignment
*c
= container_of(fd
, struct dhcp_assignment
, managed_sock
);
543 if (!(c
->flags
& OAF_STATIC
))
544 c
->valid_until
= odhcpd_time() + 15;
548 if (c
->accept_reconf
)
552 static bool assign_pd(struct interface
*iface
, struct dhcp_assignment
*assign
)
554 struct dhcp_assignment
*c
;
556 if (iface
->dhcpv6_pd_manager
[0]) {
557 int fd
= usock(USOCK_UNIX
| USOCK_TCP
, iface
->dhcpv6_pd_manager
, NULL
);
559 struct pollfd pfd
= { .fd
= fd
, .events
= POLLIN
};
562 odhcpd_hexlify(iaidbuf
, assign
->clid_data
, assign
->clid_len
);
564 assign
->managed_sock
.stream
.notify_read
= managed_handle_pd_data
;
565 assign
->managed_sock
.stream
.notify_state
= managed_handle_pd_done
;
566 ustream_fd_init(&assign
->managed_sock
, fd
);
567 ustream_printf(&assign
->managed_sock
.stream
, "%s,%x\n::/%d,0,0\n\n",
568 iaidbuf
, assign
->iaid
, assign
->length
);
569 ustream_write_pending(&assign
->managed_sock
.stream
);
570 assign
->managed_size
= -1;
572 if (!(assign
->flags
& OAF_STATIC
))
573 assign
->valid_until
= odhcpd_time() + 15;
575 list_add(&assign
->head
, &iface
->ia_assignments
);
577 /* Wait initial period of up to 250ms for immediate assignment */
578 if (poll(&pfd
, 1, 250) < 0) {
579 syslog(LOG_ERR
, "poll(): %m");
583 managed_handle_pd_data(&assign
->managed_sock
.stream
, 0);
585 if (fcntl(fd
, F_GETFL
) >= 0 && assign
->managed_size
> 0)
590 } else if (iface
->addr6_len
< 1)
593 /* Try honoring the hint first */
594 uint32_t current
= 1, asize
= (1 << (64 - assign
->length
)) - 1;
595 if (assign
->assigned
) {
596 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
597 if (c
->flags
& OAF_DHCPV6_NA
)
600 if (assign
->assigned
>= current
&& assign
->assigned
+ asize
< c
->assigned
) {
601 list_add_tail(&assign
->head
, &c
->head
);
603 if (assign
->flags
& OAF_BOUND
)
604 apply_lease(assign
, true);
609 if (c
->assigned
!= 0)
610 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
614 /* Fallback to a variable assignment */
616 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
617 if (c
->flags
& OAF_DHCPV6_NA
)
620 current
= (current
+ asize
) & (~asize
);
621 if (current
+ asize
< c
->assigned
) {
622 assign
->assigned
= current
;
623 list_add_tail(&assign
->head
, &c
->head
);
625 if (assign
->flags
& OAF_BOUND
)
626 apply_lease(assign
, true);
631 if (c
->assigned
!= 0)
632 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
638 static bool assign_na(struct interface
*iface
, struct dhcp_assignment
*a
)
640 struct dhcp_assignment
*c
;
643 /* Preconfigured assignment by static lease */
645 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
646 if (c
->assigned
> a
->assigned
|| !(c
->flags
& OAF_DHCPV6_NA
)) {
647 list_add_tail(&a
->head
, &c
->head
);
649 } else if (c
->assigned
== a
->assigned
)
654 /* Seed RNG with checksum of DUID */
655 for (size_t i
= 0; i
< a
->clid_len
; ++i
)
656 seed
+= a
->clid_data
[i
];
659 /* Try to assign up to 100x */
660 for (size_t i
= 0; i
< 100; ++i
) {
662 do try = ((uint32_t)rand()) % 0x0fff; while (try < 0x100);
664 if (config_find_lease_by_hostid(try))
667 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
668 if (c
->assigned
> try || !(c
->flags
& OAF_DHCPV6_NA
)) {
670 list_add_tail(&a
->head
, &c
->head
);
672 } else if (c
->assigned
== try)
680 static void handle_addrlist_change(struct netevent_handler_info
*info
)
682 struct interface
*iface
= info
->iface
;
683 struct dhcp_assignment
*c
, *d
, *border
= list_last_entry(
684 &iface
->ia_assignments
, struct dhcp_assignment
, head
);
685 struct list_head reassign
= LIST_HEAD_INIT(reassign
);
686 time_t now
= odhcpd_time();
688 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
689 if ((c
->flags
& OAF_DHCPV6_PD
) && !(iface
->ra_flags
& ND_RA_FLAG_MANAGED
)
690 && (c
->flags
& OAF_BOUND
))
691 __apply_lease(c
, info
->addrs_old
.addrs
,
692 info
->addrs_old
.len
, false);
695 set_border_assignment_size(iface
, border
);
697 list_for_each_entry_safe(c
, d
, &iface
->ia_assignments
, head
) {
698 if (c
->clid_len
== 0 ||
699 !(c
->flags
& OAF_DHCPV6_PD
) ||
700 (!INFINITE_VALID(c
->valid_until
) && c
->valid_until
< now
) ||
704 if (c
->assigned
== 0 || c
->assigned
>= border
->assigned
)
705 list_move(&c
->head
, &reassign
);
706 else if (c
->flags
& OAF_BOUND
)
707 apply_lease(c
, true);
709 if (c
->accept_reconf
&& c
->reconf_cnt
== 0) {
710 struct dhcp_assignment
*a
;
714 /* Leave all other assignments of that client alone */
715 list_for_each_entry(a
, &iface
->ia_assignments
, head
)
716 if (a
!= c
&& a
->clid_len
== c
->clid_len
&&
717 !memcmp(a
->clid_data
, c
->clid_data
, a
->clid_len
))
718 a
->reconf_cnt
= INT_MAX
;
722 while (!list_empty(&reassign
)) {
723 c
= list_first_entry(&reassign
, struct dhcp_assignment
, head
);
724 list_del_init(&c
->head
);
725 if (!assign_pd(iface
, c
)) {
727 list_add(&c
->head
, &iface
->ia_assignments
);
731 dhcpv6_ia_write_statefile();
734 static void reconf_timeout_cb(struct uloop_timeout
*event
)
736 struct dhcp_assignment
*a
= container_of(event
, struct dhcp_assignment
, reconf_timer
);
738 if (a
->reconf_cnt
> 0 && a
->reconf_cnt
< DHCPV6_REC_MAX_RC
) {
740 uloop_timeout_set(&a
->reconf_timer
,
741 DHCPV6_REC_TIMEOUT
<< a
->reconf_cnt
);
747 static void start_reconf(struct dhcp_assignment
*a
)
749 uloop_timeout_set(&a
->reconf_timer
,
750 DHCPV6_REC_TIMEOUT
<< a
->reconf_cnt
);
751 a
->reconf_timer
.cb
= reconf_timeout_cb
;
757 static void stop_reconf(struct dhcp_assignment
*a
)
759 uloop_timeout_cancel(&a
->reconf_timer
);
761 a
->reconf_timer
.cb
= NULL
;
764 static void valid_until_cb(struct uloop_timeout
*event
)
766 struct interface
*iface
;
767 time_t now
= odhcpd_time();
769 avl_for_each_element(&interfaces
, iface
, avl
) {
770 struct dhcp_assignment
*a
, *n
;
772 if (iface
->dhcpv6
!= MODE_SERVER
)
775 list_for_each_entry_safe(a
, n
, &iface
->ia_assignments
, head
) {
776 if (a
->clid_len
> 0 && !INFINITE_VALID(a
->valid_until
) && a
->valid_until
< now
)
780 uloop_timeout_set(event
, 1000);
783 static size_t build_ia(uint8_t *buf
, size_t buflen
, uint16_t status
,
784 const struct dhcpv6_ia_hdr
*ia
, struct dhcp_assignment
*a
,
785 struct interface
*iface
, bool request
)
787 struct dhcpv6_ia_hdr o_ia
= {
794 size_t ia_len
= sizeof(o_ia
);
795 time_t now
= odhcpd_time();
801 struct __attribute__((packed
)) {
806 .type
= htons(DHCPV6_OPT_STATUS
),
807 .len
= htons(sizeof(o_status
) - 4),
808 .val
= htons(status
),
811 memcpy(buf
+ ia_len
, &o_status
, sizeof(o_status
));
812 ia_len
+= sizeof(o_status
);
814 o_ia
.len
= htons(ia_len
- 4);
815 memcpy(buf
, &o_ia
, sizeof(o_ia
));
824 leasetime
= a
->leasetime
;
826 leasetime
= iface
->dhcpv4_leasetime
;
828 uint32_t pref
= leasetime
;
829 uint32_t valid
= leasetime
;
831 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
832 size_t addrlen
= (a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
833 size_t m
= get_preferred_addr(addrs
, addrlen
);
835 for (size_t i
= 0; i
< addrlen
; ++i
) {
836 uint32_t prefix_pref
= addrs
[i
].preferred
;
837 uint32_t prefix_valid
= addrs
[i
].valid
;
839 if (!valid_addr(&addrs
[i
], now
))
842 if (prefix_pref
!= UINT32_MAX
)
845 if (prefix_valid
!= UINT32_MAX
)
848 if (a
->flags
& OAF_DHCPV6_PD
) {
849 struct dhcpv6_ia_prefix o_ia_p
= {
850 .type
= htons(DHCPV6_OPT_IA_PREFIX
),
851 .len
= htons(sizeof(o_ia_p
) - 4),
852 .preferred
= htonl(prefix_pref
),
853 .valid
= htonl(prefix_valid
),
854 .prefix
= (a
->managed_size
) ? addrs
[i
].prefix
: a
->length
,
855 .addr
= addrs
[i
].addr
.in6
,
858 o_ia_p
.addr
.s6_addr32
[1] |= htonl(a
->assigned
);
859 o_ia_p
.addr
.s6_addr32
[2] = o_ia_p
.addr
.s6_addr32
[3] = 0;
861 if ((a
->assigned
== 0 && a
->managed_size
== 0) ||
862 !valid_prefix_length(a
, addrs
[i
].prefix
))
865 if (buflen
< ia_len
+ sizeof(o_ia_p
))
868 memcpy(buf
+ ia_len
, &o_ia_p
, sizeof(o_ia_p
));
869 ia_len
+= sizeof(o_ia_p
);
872 if (a
->flags
& OAF_DHCPV6_NA
) {
873 struct dhcpv6_ia_addr o_ia_a
= {
874 .type
= htons(DHCPV6_OPT_IA_ADDR
),
875 .len
= htons(sizeof(o_ia_a
) - 4),
876 .addr
= addrs
[i
].addr
.in6
,
877 .preferred
= htonl(prefix_pref
),
878 .valid
= htonl(prefix_valid
)
881 o_ia_a
.addr
.s6_addr32
[3] = htonl(a
->assigned
);
883 if (!ADDR_ENTRY_VALID_IA_ADDR(iface
, i
, m
, addrs
) ||
887 if (buflen
< ia_len
+ sizeof(o_ia_a
))
890 memcpy(buf
+ ia_len
, &o_ia_a
, sizeof(o_ia_a
));
891 ia_len
+= sizeof(o_ia_a
);
894 /* Calculate T1 / T2 based on non-deprecated addresses */
895 if (prefix_pref
> 0) {
896 if (prefix_pref
< pref
)
899 if (prefix_valid
< valid
)
900 valid
= prefix_valid
;
904 if (!INFINITE_VALID(a
->valid_until
))
905 /* UINT32_MAX is considered as infinite leasetime */
906 a
->valid_until
= (valid
== UINT32_MAX
) ? 0 : valid
+ now
;
908 o_ia
.t1
= htonl((pref
== UINT32_MAX
) ? pref
: pref
* 5 / 10);
909 o_ia
.t2
= htonl((pref
== UINT32_MAX
) ? pref
: pref
* 8 / 10);
919 uint8_t *odata
, *end
= ((uint8_t*)ia
) + htons(ia
->len
) + 4;
920 uint16_t otype
, olen
;
922 dhcpv6_for_each_option((uint8_t*)&ia
[1], end
, otype
, olen
, odata
) {
923 struct dhcpv6_ia_prefix
*ia_p
= (struct dhcpv6_ia_prefix
*)&odata
[-4];
924 struct dhcpv6_ia_addr
*ia_a
= (struct dhcpv6_ia_addr
*)&odata
[-4];
927 if ((otype
!= DHCPV6_OPT_IA_PREFIX
|| olen
< sizeof(*ia_p
) - 4) &&
928 (otype
!= DHCPV6_OPT_IA_ADDR
|| olen
< sizeof(*ia_a
) - 4))
932 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
933 size_t addrlen
= (a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
935 for (size_t i
= 0; i
< addrlen
; ++i
) {
936 if (!valid_addr(&addrs
[i
], now
))
939 struct in6_addr addr
= addrs
[i
].addr
.in6
;
940 if (ia
->type
== htons(DHCPV6_OPT_IA_PD
)) {
941 addr
.s6_addr32
[1] |= htonl(a
->assigned
);
942 addr
.s6_addr32
[2] = addr
.s6_addr32
[3] = 0;
944 if (!memcmp(&ia_p
->addr
, &addr
, sizeof(addr
)) &&
945 ia_p
->prefix
== ((a
->managed
) ? addrs
[i
].prefix
: a
->length
))
948 addr
.s6_addr32
[3] = htonl(a
->assigned
);
950 if (!memcmp(&ia_a
->addr
, &addr
, sizeof(addr
)))
957 if (otype
== DHCPV6_OPT_IA_PREFIX
) {
958 struct dhcpv6_ia_prefix o_ia_p
= {
959 .type
= htons(DHCPV6_OPT_IA_PREFIX
),
960 .len
= htons(sizeof(o_ia_p
) - 4),
963 .prefix
= ia_p
->prefix
,
967 if (buflen
< ia_len
+ sizeof(o_ia_p
))
970 memcpy(buf
+ ia_len
, &o_ia_p
, sizeof(o_ia_p
));
971 ia_len
+= sizeof(o_ia_p
);
973 struct dhcpv6_ia_addr o_ia_a
= {
974 .type
= htons(DHCPV6_OPT_IA_ADDR
),
975 .len
= htons(sizeof(o_ia_a
) - 4),
981 if (buflen
< ia_len
+ sizeof(o_ia_a
))
984 memcpy(buf
+ ia_len
, &o_ia_a
, sizeof(o_ia_a
));
985 ia_len
+= sizeof(o_ia_a
);
991 o_ia
.len
= htons(ia_len
- 4);
992 memcpy(buf
, &o_ia
, sizeof(o_ia
));
1002 static void dhcpv6_log_ia_addr(struct in6_addr
*addr
, int prefix
, _unused
uint32_t pref
,
1003 _unused
uint32_t valid
, void *arg
)
1005 struct log_ctxt
*ctxt
= (struct log_ctxt
*)arg
;
1006 char addrbuf
[INET6_ADDRSTRLEN
];
1008 inet_ntop(AF_INET6
, addr
, addrbuf
, sizeof(addrbuf
));
1009 ctxt
->buf_idx
+= snprintf(ctxt
->buf
+ ctxt
->buf_idx
, ctxt
->buf_len
- ctxt
->buf_idx
,
1010 "%s/%d ", addrbuf
, prefix
);
1013 static void dhcpv6_log(uint8_t msgtype
, struct interface
*iface
, time_t now
,
1014 const char *duidbuf
, bool is_pd
, struct dhcp_assignment
*a
, int code
)
1016 const char *type
= "UNKNOWN";
1017 const char *status
= "UNKNOWN";
1020 case DHCPV6_MSG_SOLICIT
:
1023 case DHCPV6_MSG_REQUEST
:
1026 case DHCPV6_MSG_CONFIRM
:
1029 case DHCPV6_MSG_RENEW
:
1032 case DHCPV6_MSG_REBIND
:
1035 case DHCPV6_MSG_RELEASE
:
1038 case DHCPV6_MSG_DECLINE
:
1044 case DHCPV6_STATUS_OK
:
1047 case DHCPV6_STATUS_NOADDRSAVAIL
:
1048 status
= "no addresses available";
1050 case DHCPV6_STATUS_NOBINDING
:
1051 status
= "no binding";
1053 case DHCPV6_STATUS_NOTONLINK
:
1054 status
= "not on-link";
1056 case DHCPV6_STATUS_NOPREFIXAVAIL
:
1057 status
= "no prefix available";
1061 char leasebuf
[256] = "";
1064 struct log_ctxt ctxt
= {.buf
= leasebuf
,
1065 .buf_len
= sizeof(leasebuf
),
1068 dhcpv6_ia_enum_addrs(iface
, a
, now
, dhcpv6_log_ia_addr
, &ctxt
);
1071 syslog(LOG_INFO
, "DHCPV6 %s %s from %s on %s: %s %s", type
, (is_pd
) ? "IA_PD" : "IA_NA",
1072 duidbuf
, iface
->name
, status
, leasebuf
);
1075 static bool dhcpv6_ia_on_link(const struct dhcpv6_ia_hdr
*ia
, struct dhcp_assignment
*a
,
1076 struct interface
*iface
)
1078 struct odhcpd_ipaddr
*addrs
= (a
&& a
->managed
) ? a
->managed
: iface
->addr6
;
1079 size_t addrlen
= (a
&& a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
1080 time_t now
= odhcpd_time();
1081 uint8_t *odata
, *end
= ((uint8_t*)ia
) + htons(ia
->len
) + 4;
1082 uint16_t otype
, olen
;
1085 dhcpv6_for_each_option((uint8_t*)&ia
[1], end
, otype
, olen
, odata
) {
1086 struct dhcpv6_ia_prefix
*p
= (struct dhcpv6_ia_prefix
*)&odata
[-4];
1087 struct dhcpv6_ia_addr
*n
= (struct dhcpv6_ia_addr
*)&odata
[-4];
1089 if ((otype
!= DHCPV6_OPT_IA_PREFIX
|| olen
< sizeof(*p
) - 4) &&
1090 (otype
!= DHCPV6_OPT_IA_ADDR
|| olen
< sizeof(*n
) - 4))
1094 for (size_t i
= 0; i
< addrlen
; ++i
) {
1095 if (!valid_addr(&addrs
[i
], now
))
1098 if (ia
->type
== htons(DHCPV6_OPT_IA_PD
)) {
1099 if (p
->prefix
< addrs
[i
].prefix
||
1100 odhcpd_bmemcmp(&p
->addr
, &addrs
[i
].addr
.in6
, addrs
[i
].prefix
))
1103 } else if (odhcpd_bmemcmp(&n
->addr
, &addrs
[i
].addr
.in6
, addrs
[i
].prefix
))
1116 ssize_t
dhcpv6_ia_handle_IAs(uint8_t *buf
, size_t buflen
, struct interface
*iface
,
1117 const struct sockaddr_in6
*addr
, const void *data
, const uint8_t *end
)
1120 struct dhcp_assignment
*first
= NULL
;
1121 const struct dhcpv6_client_header
*hdr
= data
;
1122 time_t now
= odhcpd_time();
1123 uint16_t otype
, olen
, clid_len
= 0;
1124 uint8_t *start
= (uint8_t *)&hdr
[1], *odata
;
1125 uint8_t *clid_data
= NULL
, mac
[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1126 size_t hostname_len
= 0, response_len
= 0;
1127 bool notonlink
= false, rapid_commit
= false, accept_reconf
= false;
1128 char duidbuf
[261], hostname
[256];
1130 dhcpv6_for_each_option(start
, end
, otype
, olen
, odata
) {
1131 if (otype
== DHCPV6_OPT_CLIENTID
) {
1135 if (olen
== 14 && odata
[0] == 0 && odata
[1] == 1)
1136 memcpy(mac
, &odata
[8], sizeof(mac
));
1137 else if (olen
== 10 && odata
[0] == 0 && odata
[1] == 3)
1138 memcpy(mac
, &odata
[4], sizeof(mac
));
1141 odhcpd_hexlify(duidbuf
, odata
, olen
);
1142 } else if (otype
== DHCPV6_OPT_FQDN
&& olen
>= 2 && olen
<= 255) {
1143 uint8_t fqdn_buf
[256];
1144 memcpy(fqdn_buf
, odata
, olen
);
1145 fqdn_buf
[olen
++] = 0;
1147 if (dn_expand(&fqdn_buf
[1], &fqdn_buf
[olen
], &fqdn_buf
[1], hostname
, sizeof(hostname
)) > 0)
1148 hostname_len
= strcspn(hostname
, ".");
1149 } else if (otype
== DHCPV6_OPT_RECONF_ACCEPT
)
1150 accept_reconf
= true;
1151 else if (otype
== DHCPV6_OPT_RAPID_COMMIT
&& hdr
->msg_type
== DHCPV6_MSG_SOLICIT
)
1152 rapid_commit
= true;
1155 if (!clid_data
|| !clid_len
|| clid_len
> 130)
1158 l
= config_find_lease_by_duid(clid_data
, clid_len
);
1160 l
= config_find_lease_by_mac(mac
);
1162 dhcpv6_for_each_option(start
, end
, otype
, olen
, odata
) {
1163 bool is_pd
= (otype
== DHCPV6_OPT_IA_PD
);
1164 bool is_na
= (otype
== DHCPV6_OPT_IA_NA
);
1165 bool ia_addr_present
= false;
1166 if (!is_pd
&& !is_na
)
1169 struct dhcpv6_ia_hdr
*ia
= (struct dhcpv6_ia_hdr
*)&odata
[-4];
1170 size_t ia_response_len
= 0;
1171 uint8_t reqlen
= (is_pd
) ? 62 : 128;
1172 uint32_t reqhint
= 0;
1174 /* Parse request hint for IA-PD */
1177 uint16_t stype
, slen
;
1178 dhcpv6_for_each_option(&ia
[1], odata
+ olen
, stype
, slen
, sdata
) {
1179 if (stype
!= DHCPV6_OPT_IA_PREFIX
|| slen
< sizeof(struct dhcpv6_ia_prefix
) - 4)
1182 struct dhcpv6_ia_prefix
*p
= (struct dhcpv6_ia_prefix
*)&sdata
[-4];
1185 reqhint
= ntohl(p
->addr
.s6_addr32
[1]);
1186 if (reqlen
> 32 && reqlen
<= 64)
1187 reqhint
&= (1U << (64 - reqlen
)) - 1;
1195 uint16_t stype
, slen
;
1196 dhcpv6_for_each_option(&ia
[1], odata
+ olen
, stype
, slen
, sdata
) {
1197 if (stype
!= DHCPV6_OPT_IA_ADDR
|| slen
< sizeof(struct dhcpv6_ia_addr
) - 4)
1200 ia_addr_present
= true;
1204 /* Find assignment */
1205 struct dhcp_assignment
*c
, *a
= NULL
;
1206 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
1207 if ((c
->clid_len
== clid_len
&& !memcmp(c
->clid_data
, clid_data
, clid_len
)) &&
1208 c
->iaid
== ia
->iaid
&& (INFINITE_VALID(c
->valid_until
) || now
< c
->valid_until
) &&
1209 ((is_pd
&& (c
->flags
& OAF_DHCPV6_PD
)) || (is_na
&& (c
->flags
& OAF_DHCPV6_NA
)))) {
1213 if (a
->flags
& OAF_BOUND
)
1214 apply_lease(a
, false);
1221 if (l
&& a
&& a
->lease
!= l
) {
1226 /* Generic message handling */
1227 uint16_t status
= DHCPV6_STATUS_OK
;
1228 if (a
&& a
->managed_size
< 0)
1231 if (hdr
->msg_type
== DHCPV6_MSG_SOLICIT
||
1232 hdr
->msg_type
== DHCPV6_MSG_REQUEST
||
1233 (hdr
->msg_type
== DHCPV6_MSG_REBIND
&& !a
)) {
1234 bool assigned
= !!a
;
1237 if ((!iface
->no_dynamic_dhcp
|| (l
&& is_na
)) &&
1238 (iface
->dhcpv6_pd
|| iface
->dhcpv6_na
)) {
1239 /* Create new binding */
1240 a
= alloc_assignment(clid_len
);
1243 a
->clid_len
= clid_len
;
1244 memcpy(a
->clid_data
, clid_data
, clid_len
);
1248 a
->assigned
= is_na
&& l
? l
->hostid
: reqhint
;
1249 /* Set valid time to 0 for static lease indicating */
1250 /* infinite lifetime otherwise current time */
1251 a
->valid_until
= l
? 0 : now
;
1252 a
->dhcp_free_cb
= dhcpv6_ia_free_assignment
;
1254 a
->flags
= (is_pd
? OAF_DHCPV6_PD
: OAF_DHCPV6_NA
);
1257 memcpy(a
->key
, first
->key
, sizeof(a
->key
));
1259 odhcpd_urandom(a
->key
, sizeof(a
->key
));
1261 if (is_pd
&& iface
->dhcpv6_pd
)
1262 while (!(assigned
= assign_pd(iface
, a
)) &&
1263 !a
->managed_size
&& ++a
->length
<= 64);
1264 else if (is_na
&& iface
->dhcpv6_na
)
1265 assigned
= assign_na(iface
, a
);
1267 if (l
&& assigned
) {
1268 a
->flags
|= OAF_STATIC
;
1271 a
->hostname
= strdup(l
->hostname
);
1274 a
->leasetime
= l
->leasetime
;
1276 list_add(&a
->lease_list
, &l
->assignments
);
1280 if (a
->managed_size
&& !assigned
)
1286 if (!assigned
|| iface
->addr6_len
== 0)
1287 /* Set error status */
1288 status
= (is_pd
) ? DHCPV6_STATUS_NOPREFIXAVAIL
: DHCPV6_STATUS_NOADDRSAVAIL
;
1289 else if (hdr
->msg_type
== DHCPV6_MSG_REQUEST
&& !dhcpv6_ia_on_link(ia
, a
, iface
)) {
1290 /* Send NOTONLINK staus for the IA */
1291 status
= DHCPV6_STATUS_NOTONLINK
;
1293 } else if (accept_reconf
&& assigned
&& !first
&&
1294 hdr
->msg_type
!= DHCPV6_MSG_REBIND
) {
1295 size_t handshake_len
= 4;
1297 buf
[1] = DHCPV6_OPT_RECONF_ACCEPT
;
1301 if (hdr
->msg_type
== DHCPV6_MSG_REQUEST
) {
1302 struct dhcpv6_auth_reconfigure auth
= {
1303 htons(DHCPV6_OPT_AUTH
),
1304 htons(sizeof(auth
) - 4),
1306 {htonl(time(NULL
)), htonl(++serial
)},
1310 memcpy(auth
.key
, a
->key
, sizeof(a
->key
));
1311 memcpy(buf
+ handshake_len
, &auth
, sizeof(auth
));
1312 handshake_len
+= sizeof(auth
);
1316 buf
+= handshake_len
;
1317 buflen
-= handshake_len
;
1318 response_len
+= handshake_len
;
1323 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
,
1324 hdr
->msg_type
== DHCPV6_MSG_REBIND
? false : true);
1326 /* Was only a solicitation: mark binding for removal */
1327 if (assigned
&& hdr
->msg_type
== DHCPV6_MSG_SOLICIT
&& !rapid_commit
) {
1328 a
->flags
&= ~OAF_BOUND
;
1329 a
->flags
|= OAF_TENTATIVE
;
1331 if (!(a
->flags
& OAF_STATIC
))
1332 /* Keep tentative assignment around for 60 seconds */
1333 a
->valid_until
= now
+ 60;
1335 } else if (assigned
&&
1336 ((hdr
->msg_type
== DHCPV6_MSG_SOLICIT
&& rapid_commit
) ||
1337 hdr
->msg_type
== DHCPV6_MSG_REQUEST
||
1338 hdr
->msg_type
== DHCPV6_MSG_REBIND
)) {
1339 if ((!(a
->flags
& OAF_STATIC
) || !a
->hostname
) && hostname_len
> 0) {
1340 a
->hostname
= realloc(a
->hostname
, hostname_len
+ 1);
1342 memcpy(a
->hostname
, hostname
, hostname_len
);
1343 a
->hostname
[hostname_len
] = 0;
1345 if (odhcpd_valid_hostname(a
->hostname
))
1346 a
->flags
&= ~OAF_BROKEN_HOSTNAME
;
1348 a
->flags
|= OAF_BROKEN_HOSTNAME
;
1351 a
->accept_reconf
= accept_reconf
;
1352 a
->flags
&= ~OAF_TENTATIVE
;
1353 a
->flags
|= OAF_BOUND
;
1354 apply_lease(a
, true);
1355 } else if (!assigned
&& a
&& a
->managed_size
== 0) {
1356 /* Cleanup failed assignment */
1360 } else if (hdr
->msg_type
== DHCPV6_MSG_RENEW
||
1361 hdr
->msg_type
== DHCPV6_MSG_RELEASE
||
1362 hdr
->msg_type
== DHCPV6_MSG_REBIND
||
1363 hdr
->msg_type
== DHCPV6_MSG_DECLINE
) {
1364 if (!a
&& hdr
->msg_type
!= DHCPV6_MSG_REBIND
) {
1365 status
= DHCPV6_STATUS_NOBINDING
;
1366 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
, false);
1367 } else if (hdr
->msg_type
== DHCPV6_MSG_RENEW
||
1368 hdr
->msg_type
== DHCPV6_MSG_REBIND
) {
1369 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
, false);
1371 a
->flags
|= OAF_BOUND
;
1372 apply_lease(a
, true);
1374 } else if (hdr
->msg_type
== DHCPV6_MSG_RELEASE
) {
1375 if (a
->flags
& OAF_STATIC
) {
1376 apply_lease(a
, false);
1377 a
->flags
&= ~OAF_BOUND
;
1380 a
->valid_until
= now
- 1;
1382 } else if ((a
->flags
& OAF_DHCPV6_NA
) && hdr
->msg_type
== DHCPV6_MSG_DECLINE
) {
1383 a
->flags
&= ~OAF_BOUND
;
1385 if (!(a
->flags
& OAF_STATIC
)) {
1386 memset(a
->clid_data
, 0, a
->clid_len
);
1387 a
->valid_until
= now
+ 3600; /* Block address for 1h */
1390 } else if (hdr
->msg_type
== DHCPV6_MSG_CONFIRM
) {
1391 if (ia_addr_present
&& !dhcpv6_ia_on_link(ia
, a
, iface
)) {
1396 if (!ia_addr_present
|| !a
|| !(a
->flags
& OAF_BOUND
)) {
1402 buf
+= ia_response_len
;
1403 buflen
-= ia_response_len
;
1404 response_len
+= ia_response_len
;
1405 dhcpv6_log(hdr
->msg_type
, iface
, now
, duidbuf
, is_pd
, a
, status
);
1408 switch (hdr
->msg_type
) {
1409 case DHCPV6_MSG_RELEASE
:
1410 case DHCPV6_MSG_DECLINE
:
1411 case DHCPV6_MSG_CONFIRM
:
1412 if (response_len
+ 6 < buflen
) {
1414 buf
[1] = DHCPV6_OPT_STATUS
;
1418 buf
[5] = (notonlink
) ? DHCPV6_STATUS_NOTONLINK
: DHCPV6_STATUS_OK
;
1427 dhcpv6_ia_write_statefile();
1430 return response_len
;