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
;
237 if (c
->flags
& OAF_DHCPV6_NA
) {
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_t)c
->valid_until
)
251 pref
= c
->valid_until
;
253 if (pref
!= UINT32_MAX
)
256 if (valid
> (uint32_t)c
->valid_until
)
257 valid
= c
->valid_until
;
259 if (valid
!= UINT32_MAX
)
262 func(&addr
, prefix
, pref
, valid
, arg
);
269 struct dhcp_assignment
*c
;
270 struct interface
*iface
;
276 static void dhcpv6_write_ia_addr(struct in6_addr
*addr
, int prefix
, _unused
uint32_t pref
,
277 _unused
uint32_t valid
, void *arg
)
279 struct write_ctxt
*ctxt
= (struct write_ctxt
*)arg
;
280 char ipbuf
[INET6_ADDRSTRLEN
];
282 inet_ntop(AF_INET6
, addr
, ipbuf
, sizeof(ipbuf
) - 1);
284 if ((ctxt
->c
->flags
& OAF_DHCPV6_NA
) && ctxt
->c
->hostname
&&
285 !(ctxt
->c
->flags
& OAF_BROKEN_HOSTNAME
)) {
286 fputs(ipbuf
, ctxt
->fp
);
289 if (dn_expand(ctxt
->iface
->search
, ctxt
->iface
->search
+ ctxt
->iface
->search_len
,
290 ctxt
->iface
->search
, b
, sizeof(b
)) > 0)
291 fprintf(ctxt
->fp
, "\t%s.%s", ctxt
->c
->hostname
, b
);
293 fprintf(ctxt
->fp
, "\t%s\n", ctxt
->c
->hostname
);
294 md5_hash(ipbuf
, strlen(ipbuf
), &ctxt
->md5
);
295 md5_hash(ctxt
->c
->hostname
, strlen(ctxt
->c
->hostname
), &ctxt
->md5
);
298 ctxt
->buf_idx
+= snprintf(ctxt
->buf
+ ctxt
->buf_idx
,ctxt
->buf_len
- ctxt
->buf_idx
,
299 "%s/%d ", ipbuf
, prefix
);
302 void dhcpv6_ia_write_statefile(void)
304 struct write_ctxt ctxt
;
306 md5_begin(&ctxt
.md5
);
308 if (config
.dhcp_statefile
) {
309 time_t now
= odhcpd_time(), wall_time
= time(NULL
);
310 int fd
= open(config
.dhcp_statefile
, O_CREAT
| O_WRONLY
| O_CLOEXEC
, 0644);
316 ret
= lockf(fd
, F_LOCK
, 0);
321 if (ftruncate(fd
, 0) < 0) {}
323 ctxt
.fp
= fdopen(fd
, "w");
330 ctxt
.buf_len
= sizeof(leasebuf
);
332 avl_for_each_element(&interfaces
, ctxt
.iface
, avl
) {
333 if (ctxt
.iface
->dhcpv6
!= MODE_SERVER
&&
334 ctxt
.iface
->dhcpv4
!= MODE_SERVER
)
337 if (ctxt
.iface
->dhcpv6
== MODE_SERVER
) {
338 list_for_each_entry(ctxt
.c
, &ctxt
.iface
->ia_assignments
, head
) {
339 if (!(ctxt
.c
->flags
& OAF_BOUND
) || ctxt
.c
->managed_size
< 0)
344 odhcpd_hexlify(duidbuf
, ctxt
.c
->clid_data
, ctxt
.c
->clid_len
);
346 /* iface DUID iaid hostname lifetime assigned length [addrs...] */
347 ctxt
.buf_idx
= snprintf(ctxt
.buf
, ctxt
.buf_len
, "# %s %s %x %s%s %"PRId64
" %x %u ",
348 ctxt
.iface
->ifname
, duidbuf
, ntohl(ctxt
.c
->iaid
),
349 (ctxt
.c
->flags
& OAF_BROKEN_HOSTNAME
) ? "broken\\x20" : "",
350 (ctxt
.c
->hostname
? ctxt
.c
->hostname
: "-"),
351 (ctxt
.c
->valid_until
> now
?
352 (int64_t)(ctxt
.c
->valid_until
- now
+ wall_time
) :
353 (INFINITE_VALID(ctxt
.c
->valid_until
) ? -1 : 0)),
354 ctxt
.c
->assigned
, (unsigned)ctxt
.c
->length
);
356 if (INFINITE_VALID(ctxt
.c
->valid_until
) || ctxt
.c
->valid_until
> now
)
357 dhcpv6_ia_enum_addrs(ctxt
.iface
, ctxt
.c
, now
,
358 dhcpv6_write_ia_addr
, &ctxt
);
360 ctxt
.buf
[ctxt
.buf_idx
- 1] = '\n';
361 fwrite(ctxt
.buf
, 1, ctxt
.buf_idx
, ctxt
.fp
);
365 if (ctxt
.iface
->dhcpv4
== MODE_SERVER
) {
366 struct dhcp_assignment
*c
;
368 list_for_each_entry(c
, &ctxt
.iface
->dhcpv4_assignments
, head
) {
369 if (!(c
->flags
& OAF_BOUND
))
372 char ipbuf
[INET6_ADDRSTRLEN
];
374 odhcpd_hexlify(duidbuf
, c
->hwaddr
, sizeof(c
->hwaddr
));
376 /* iface DUID iaid hostname lifetime assigned length [addrs...] */
377 ctxt
.buf_idx
= snprintf(ctxt
.buf
, ctxt
.buf_len
, "# %s %s ipv4 %s%s %"PRId64
" %x 32 ",
378 ctxt
.iface
->ifname
, duidbuf
,
379 (c
->flags
& OAF_BROKEN_HOSTNAME
) ? "broken\\x20" : "",
380 (c
->hostname
? c
->hostname
: "-"),
381 (c
->valid_until
> now
?
382 (int64_t)(c
->valid_until
- now
+ wall_time
) :
383 (INFINITE_VALID(c
->valid_until
) ? -1 : 0)),
386 struct in_addr addr
= {.s_addr
= c
->addr
};
387 inet_ntop(AF_INET
, &addr
, ipbuf
, sizeof(ipbuf
) - 1);
389 if (c
->hostname
&& !(c
->flags
& OAF_BROKEN_HOSTNAME
)) {
390 fputs(ipbuf
, ctxt
.fp
);
393 if (dn_expand(ctxt
.iface
->search
,
394 ctxt
.iface
->search
+ ctxt
.iface
->search_len
,
395 ctxt
.iface
->search
, b
, sizeof(b
)) > 0)
396 fprintf(ctxt
.fp
, "\t%s.%s", c
->hostname
, b
);
398 fprintf(ctxt
.fp
, "\t%s\n", c
->hostname
);
399 md5_hash(ipbuf
, strlen(ipbuf
), &ctxt
.md5
);
400 md5_hash(c
->hostname
, strlen(c
->hostname
), &ctxt
.md5
);
403 ctxt
.buf_idx
+= snprintf(ctxt
.buf
+ ctxt
.buf_idx
,
404 ctxt
.buf_len
- ctxt
.buf_idx
,
406 ctxt
.buf
[ctxt
.buf_idx
- 1] = '\n';
407 fwrite(ctxt
.buf
, 1, ctxt
.buf_idx
, ctxt
.fp
);
416 md5_end(newmd5
, &ctxt
.md5
);
418 if (config
.dhcp_cb
&& memcmp(newmd5
, statemd5
, sizeof(newmd5
))) {
419 memcpy(statemd5
, newmd5
, sizeof(statemd5
));
420 char *argv
[2] = {config
.dhcp_cb
, NULL
};
422 execv(argv
[0], argv
);
428 static void __apply_lease(struct dhcp_assignment
*a
,
429 struct odhcpd_ipaddr
*addrs
, ssize_t addr_len
, bool add
)
431 if (a
->flags
& OAF_DHCPV6_NA
)
434 for (ssize_t i
= 0; i
< addr_len
; ++i
) {
435 struct in6_addr prefix
= addrs
[i
].addr
.in6
;
436 prefix
.s6_addr32
[1] |= htonl(a
->assigned
);
437 prefix
.s6_addr32
[2] = prefix
.s6_addr32
[3] = 0;
438 netlink_setup_route(&prefix
, (a
->managed_size
) ? addrs
[i
].prefix
: a
->length
,
439 a
->iface
->ifindex
, &a
->peer
.sin6_addr
, 1024, add
);
443 static void apply_lease(struct dhcp_assignment
*a
, bool add
)
445 struct interface
*iface
= a
->iface
;
446 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
447 ssize_t addrlen
= (a
->managed
) ? a
->managed_size
: (ssize_t
)iface
->addr6_len
;
449 __apply_lease(a
, addrs
, addrlen
, add
);
452 /* Set border assignment size based on the IPv6 address prefixes */
453 static void set_border_assignment_size(struct interface
*iface
, struct dhcp_assignment
*b
)
455 time_t now
= odhcpd_time();
458 for (size_t i
= 0; i
< iface
->addr6_len
; ++i
) {
459 if (iface
->addr6
[i
].preferred
> (uint32_t)now
&&
460 iface
->addr6
[i
].prefix
< 64 &&
461 iface
->addr6
[i
].prefix
> minprefix
)
462 minprefix
= iface
->addr6
[i
].prefix
;
465 if (minprefix
> 32 && minprefix
<= 64)
466 b
->assigned
= 1U << (64 - minprefix
);
471 /* More data was received from TCP connection */
472 static void managed_handle_pd_data(struct ustream
*s
, _unused
int bytes_new
)
474 struct ustream_fd
*fd
= container_of(s
, struct ustream_fd
, stream
);
475 struct dhcp_assignment
*c
= container_of(fd
, struct dhcp_assignment
, managed_sock
);
476 time_t now
= odhcpd_time();
477 bool first
= c
->managed_size
< 0;
481 char *data
= ustream_get_read_buf(s
, &pending
);
482 char *end
= memmem(data
, pending
, "\n\n", 2);
491 if (c
->accept_reconf
)
495 for (char *line
= strtok_r(data
, "\n", &saveptr
); line
; line
= strtok_r(NULL
, "\n", &saveptr
)) {
496 c
->managed
= realloc(c
->managed
, (c
->managed_size
+ 1) * sizeof(*c
->managed
));
497 struct odhcpd_ipaddr
*n
= &c
->managed
[c
->managed_size
];
499 char *saveptr2
, *x
= strtok_r(line
, "/", &saveptr2
);
500 if (!x
|| inet_pton(AF_INET6
, x
, &n
->addr
) < 1)
503 x
= strtok_r(NULL
, ",", &saveptr2
);
504 if (sscanf(x
, "%hhu", &n
->prefix
) < 1)
507 x
= strtok_r(NULL
, ",", &saveptr2
);
508 if (sscanf(x
, "%u", &n
->preferred
) < 1)
511 x
= strtok_r(NULL
, ",", &saveptr2
);
512 if (sscanf(x
, "%u", &n
->valid
) < 1)
515 if (n
->preferred
> n
->valid
)
518 if (UINT32_MAX
- now
< n
->preferred
)
519 n
->preferred
= UINT32_MAX
;
523 if (UINT32_MAX
- now
< n
->valid
)
524 n
->valid
= UINT32_MAX
;
533 ustream_consume(s
, end
- data
);
536 if (first
&& c
->managed_size
== 0)
539 c
->valid_until
= now
+ 150;
543 /* TCP transmission has ended, either because of success or timeout or other error */
544 static void managed_handle_pd_done(struct ustream
*s
)
546 struct ustream_fd
*fd
= container_of(s
, struct ustream_fd
, stream
);
547 struct dhcp_assignment
*c
= container_of(fd
, struct dhcp_assignment
, managed_sock
);
549 c
->valid_until
= odhcpd_time() + 15;
553 if (c
->accept_reconf
)
557 static bool assign_pd(struct interface
*iface
, struct dhcp_assignment
*assign
)
559 struct dhcp_assignment
*c
;
561 if (iface
->dhcpv6_pd_manager
[0]) {
562 int fd
= usock(USOCK_UNIX
| USOCK_TCP
, iface
->dhcpv6_pd_manager
, NULL
);
564 struct pollfd pfd
= { .fd
= fd
, .events
= POLLIN
};
567 odhcpd_hexlify(iaidbuf
, assign
->clid_data
, assign
->clid_len
);
569 assign
->managed_sock
.stream
.notify_read
= managed_handle_pd_data
;
570 assign
->managed_sock
.stream
.notify_state
= managed_handle_pd_done
;
571 ustream_fd_init(&assign
->managed_sock
, fd
);
572 ustream_printf(&assign
->managed_sock
.stream
, "%s,%x\n::/%d,0,0\n\n",
573 iaidbuf
, assign
->iaid
, assign
->length
);
574 ustream_write_pending(&assign
->managed_sock
.stream
);
575 assign
->managed_size
= -1;
577 assign
->valid_until
= odhcpd_time() + 15;
579 list_add(&assign
->head
, &iface
->ia_assignments
);
581 /* Wait initial period of up to 250ms for immediate assignment */
582 if (poll(&pfd
, 1, 250) < 0) {
583 syslog(LOG_ERR
, "poll(): %m");
587 managed_handle_pd_data(&assign
->managed_sock
.stream
, 0);
589 if (fcntl(fd
, F_GETFL
) >= 0 && assign
->managed_size
> 0)
594 } else if (iface
->addr6_len
< 1)
597 /* Try honoring the hint first */
598 uint32_t current
= 1, asize
= (1 << (64 - assign
->length
)) - 1;
599 if (assign
->assigned
) {
600 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
601 if (c
->flags
& OAF_DHCPV6_NA
)
604 if (assign
->assigned
>= current
&& assign
->assigned
+ asize
< c
->assigned
) {
605 list_add_tail(&assign
->head
, &c
->head
);
607 if (assign
->flags
& OAF_BOUND
)
608 apply_lease(assign
, true);
613 if (c
->assigned
!= 0)
614 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
618 /* Fallback to a variable assignment */
620 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
621 if (c
->flags
& OAF_DHCPV6_NA
)
624 current
= (current
+ asize
) & (~asize
);
625 if (current
+ asize
< c
->assigned
) {
626 assign
->assigned
= current
;
627 list_add_tail(&assign
->head
, &c
->head
);
629 if (assign
->flags
& OAF_BOUND
)
630 apply_lease(assign
, true);
635 if (c
->assigned
!= 0)
636 current
= (c
->assigned
+ (1 << (64 - c
->length
)));
642 static bool assign_na(struct interface
*iface
, struct dhcp_assignment
*a
)
644 struct dhcp_assignment
*c
;
647 /* Preconfigured assignment by static lease */
649 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
650 if (c
->assigned
> a
->assigned
|| !(c
->flags
& OAF_DHCPV6_NA
)) {
651 list_add_tail(&a
->head
, &c
->head
);
653 } else if (c
->assigned
== a
->assigned
)
658 /* Seed RNG with checksum of DUID */
659 for (size_t i
= 0; i
< a
->clid_len
; ++i
)
660 seed
+= a
->clid_data
[i
];
663 /* Try to assign up to 100x */
664 for (size_t i
= 0; i
< 100; ++i
) {
666 do try = ((uint32_t)rand()) % 0x0fff; while (try < 0x100);
668 if (config_find_lease_by_hostid(try))
671 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
672 if (c
->assigned
> try || !(c
->flags
& OAF_DHCPV6_NA
)) {
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
->flags
& OAF_DHCPV6_PD
) && !(iface
->ra_flags
& ND_RA_FLAG_MANAGED
)
694 && (c
->flags
& OAF_BOUND
))
695 __apply_lease(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 ||
703 !(c
->flags
& OAF_DHCPV6_PD
) ||
704 (!INFINITE_VALID(c
->valid_until
) && c
->valid_until
< now
) ||
708 if (c
->assigned
== 0 || c
->assigned
>= border
->assigned
)
709 list_move(&c
->head
, &reassign
);
710 else if (c
->flags
& OAF_BOUND
)
711 apply_lease(c
, true);
713 if (c
->accept_reconf
&& c
->reconf_cnt
== 0) {
714 struct dhcp_assignment
*a
;
718 /* Leave all other assignments of that client alone */
719 list_for_each_entry(a
, &iface
->ia_assignments
, head
)
720 if (a
!= c
&& a
->clid_len
== c
->clid_len
&&
721 !memcmp(a
->clid_data
, c
->clid_data
, a
->clid_len
))
722 a
->reconf_cnt
= INT_MAX
;
726 while (!list_empty(&reassign
)) {
727 c
= list_first_entry(&reassign
, struct dhcp_assignment
, head
);
728 list_del_init(&c
->head
);
729 if (!assign_pd(iface
, c
)) {
731 list_add(&c
->head
, &iface
->ia_assignments
);
735 dhcpv6_ia_write_statefile();
738 static void reconf_timeout_cb(struct uloop_timeout
*event
)
740 struct dhcp_assignment
*a
= container_of(event
, struct dhcp_assignment
, reconf_timer
);
742 if (a
->reconf_cnt
> 0 && a
->reconf_cnt
< DHCPV6_REC_MAX_RC
) {
744 uloop_timeout_set(&a
->reconf_timer
,
745 DHCPV6_REC_TIMEOUT
<< a
->reconf_cnt
);
751 static void start_reconf(struct dhcp_assignment
*a
)
753 uloop_timeout_set(&a
->reconf_timer
,
754 DHCPV6_REC_TIMEOUT
<< a
->reconf_cnt
);
755 a
->reconf_timer
.cb
= reconf_timeout_cb
;
761 static void stop_reconf(struct dhcp_assignment
*a
)
763 uloop_timeout_cancel(&a
->reconf_timer
);
765 a
->reconf_timer
.cb
= NULL
;
768 static void valid_until_cb(struct uloop_timeout
*event
)
770 struct interface
*iface
;
771 time_t now
= odhcpd_time();
773 avl_for_each_element(&interfaces
, iface
, avl
) {
774 struct dhcp_assignment
*a
, *n
;
776 if (iface
->dhcpv6
!= MODE_SERVER
)
779 list_for_each_entry_safe(a
, n
, &iface
->ia_assignments
, head
) {
780 if (a
->clid_len
> 0 && !INFINITE_VALID(a
->valid_until
) && a
->valid_until
< now
)
784 uloop_timeout_set(event
, 1000);
787 static size_t build_ia(uint8_t *buf
, size_t buflen
, uint16_t status
,
788 const struct dhcpv6_ia_hdr
*ia
, struct dhcp_assignment
*a
,
789 struct interface
*iface
, bool request
)
791 struct dhcpv6_ia_hdr o_ia
= {
798 size_t ia_len
= sizeof(o_ia
);
799 time_t now
= odhcpd_time();
805 struct __attribute__((packed
)) {
810 .type
= htons(DHCPV6_OPT_STATUS
),
811 .len
= htons(sizeof(o_status
) - 4),
812 .val
= htons(status
),
815 memcpy(buf
+ ia_len
, &o_status
, sizeof(o_status
));
816 ia_len
+= sizeof(o_status
);
818 o_ia
.len
= htons(ia_len
- 4);
819 memcpy(buf
, &o_ia
, sizeof(o_ia
));
828 leasetime
= a
->leasetime
;
830 leasetime
= iface
->dhcp_leasetime
;
832 uint32_t pref
= leasetime
;
833 uint32_t valid
= leasetime
;
835 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
836 size_t addrlen
= (a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
837 size_t m
= get_preferred_addr(addrs
, addrlen
);
839 for (size_t i
= 0; i
< addrlen
; ++i
) {
840 uint32_t prefix_pref
= addrs
[i
].preferred
;
841 uint32_t prefix_valid
= addrs
[i
].valid
;
843 if (!valid_addr(&addrs
[i
], now
))
846 if (prefix_pref
!= UINT32_MAX
)
849 if (prefix_pref
> leasetime
)
850 prefix_pref
= leasetime
;
852 if (prefix_valid
!= UINT32_MAX
)
855 if (prefix_valid
> leasetime
)
856 prefix_valid
= leasetime
;
858 if (a
->flags
& OAF_DHCPV6_PD
) {
859 struct dhcpv6_ia_prefix o_ia_p
= {
860 .type
= htons(DHCPV6_OPT_IA_PREFIX
),
861 .len
= htons(sizeof(o_ia_p
) - 4),
862 .preferred
= htonl(prefix_pref
),
863 .valid
= htonl(prefix_valid
),
864 .prefix
= (a
->managed_size
) ? addrs
[i
].prefix
: a
->length
,
865 .addr
= addrs
[i
].addr
.in6
,
868 o_ia_p
.addr
.s6_addr32
[1] |= htonl(a
->assigned
);
869 o_ia_p
.addr
.s6_addr32
[2] = o_ia_p
.addr
.s6_addr32
[3] = 0;
871 if ((a
->assigned
== 0 && a
->managed_size
== 0) ||
872 !valid_prefix_length(a
, addrs
[i
].prefix
))
875 if (buflen
< ia_len
+ sizeof(o_ia_p
))
878 memcpy(buf
+ ia_len
, &o_ia_p
, sizeof(o_ia_p
));
879 ia_len
+= sizeof(o_ia_p
);
882 if (a
->flags
& OAF_DHCPV6_NA
) {
883 struct dhcpv6_ia_addr o_ia_a
= {
884 .type
= htons(DHCPV6_OPT_IA_ADDR
),
885 .len
= htons(sizeof(o_ia_a
) - 4),
886 .addr
= addrs
[i
].addr
.in6
,
887 .preferred
= htonl(prefix_pref
),
888 .valid
= htonl(prefix_valid
)
891 o_ia_a
.addr
.s6_addr32
[3] = htonl(a
->assigned
);
893 if (!ADDR_ENTRY_VALID_IA_ADDR(iface
, i
, m
, addrs
) ||
897 if (buflen
< ia_len
+ sizeof(o_ia_a
))
900 memcpy(buf
+ ia_len
, &o_ia_a
, sizeof(o_ia_a
));
901 ia_len
+= sizeof(o_ia_a
);
904 /* Calculate T1 / T2 based on non-deprecated addresses */
905 if (prefix_pref
> 0) {
906 if (prefix_pref
< pref
)
909 if (prefix_valid
< valid
)
910 valid
= prefix_valid
;
914 if (!INFINITE_VALID(a
->valid_until
))
915 /* UINT32_MAX is considered as infinite leasetime */
916 a
->valid_until
= (valid
== UINT32_MAX
) ? 0 : valid
+ now
;
918 o_ia
.t1
= htonl((pref
== UINT32_MAX
) ? pref
: pref
* 5 / 10);
919 o_ia
.t2
= htonl((pref
== UINT32_MAX
) ? pref
: pref
* 8 / 10);
929 uint8_t *odata
, *end
= ((uint8_t*)ia
) + htons(ia
->len
) + 4;
930 uint16_t otype
, olen
;
932 dhcpv6_for_each_option((uint8_t*)&ia
[1], end
, otype
, olen
, odata
) {
933 struct dhcpv6_ia_prefix
*ia_p
= (struct dhcpv6_ia_prefix
*)&odata
[-4];
934 struct dhcpv6_ia_addr
*ia_a
= (struct dhcpv6_ia_addr
*)&odata
[-4];
937 if ((otype
!= DHCPV6_OPT_IA_PREFIX
|| olen
< sizeof(*ia_p
) - 4) &&
938 (otype
!= DHCPV6_OPT_IA_ADDR
|| olen
< sizeof(*ia_a
) - 4))
942 struct odhcpd_ipaddr
*addrs
= (a
->managed
) ? a
->managed
: iface
->addr6
;
943 size_t addrlen
= (a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
945 for (size_t i
= 0; i
< addrlen
; ++i
) {
946 if (!valid_addr(&addrs
[i
], now
))
949 struct in6_addr addr
= addrs
[i
].addr
.in6
;
950 if (ia
->type
== htons(DHCPV6_OPT_IA_PD
)) {
951 addr
.s6_addr32
[1] |= htonl(a
->assigned
);
952 addr
.s6_addr32
[2] = addr
.s6_addr32
[3] = 0;
954 if (!memcmp(&ia_p
->addr
, &addr
, sizeof(addr
)) &&
955 ia_p
->prefix
== ((a
->managed
) ? addrs
[i
].prefix
: a
->length
))
958 addr
.s6_addr32
[3] = htonl(a
->assigned
);
960 if (!memcmp(&ia_a
->addr
, &addr
, sizeof(addr
)))
967 if (otype
== DHCPV6_OPT_IA_PREFIX
) {
968 struct dhcpv6_ia_prefix o_ia_p
= {
969 .type
= htons(DHCPV6_OPT_IA_PREFIX
),
970 .len
= htons(sizeof(o_ia_p
) - 4),
973 .prefix
= ia_p
->prefix
,
977 if (buflen
< ia_len
+ sizeof(o_ia_p
))
980 memcpy(buf
+ ia_len
, &o_ia_p
, sizeof(o_ia_p
));
981 ia_len
+= sizeof(o_ia_p
);
983 struct dhcpv6_ia_addr o_ia_a
= {
984 .type
= htons(DHCPV6_OPT_IA_ADDR
),
985 .len
= htons(sizeof(o_ia_a
) - 4),
991 if (buflen
< ia_len
+ sizeof(o_ia_a
))
994 memcpy(buf
+ ia_len
, &o_ia_a
, sizeof(o_ia_a
));
995 ia_len
+= sizeof(o_ia_a
);
1001 o_ia
.len
= htons(ia_len
- 4);
1002 memcpy(buf
, &o_ia
, sizeof(o_ia
));
1012 static void dhcpv6_log_ia_addr(struct in6_addr
*addr
, int prefix
, _unused
uint32_t pref
,
1013 _unused
uint32_t valid
, void *arg
)
1015 struct log_ctxt
*ctxt
= (struct log_ctxt
*)arg
;
1016 char addrbuf
[INET6_ADDRSTRLEN
];
1018 inet_ntop(AF_INET6
, addr
, addrbuf
, sizeof(addrbuf
));
1019 ctxt
->buf_idx
+= snprintf(ctxt
->buf
+ ctxt
->buf_idx
, ctxt
->buf_len
- ctxt
->buf_idx
,
1020 "%s/%d ", addrbuf
, prefix
);
1023 static void dhcpv6_log(uint8_t msgtype
, struct interface
*iface
, time_t now
,
1024 const char *duidbuf
, bool is_pd
, struct dhcp_assignment
*a
, int code
)
1026 const char *type
= "UNKNOWN";
1027 const char *status
= "UNKNOWN";
1030 case DHCPV6_MSG_SOLICIT
:
1033 case DHCPV6_MSG_REQUEST
:
1036 case DHCPV6_MSG_CONFIRM
:
1039 case DHCPV6_MSG_RENEW
:
1042 case DHCPV6_MSG_REBIND
:
1045 case DHCPV6_MSG_RELEASE
:
1048 case DHCPV6_MSG_DECLINE
:
1054 case DHCPV6_STATUS_OK
:
1057 case DHCPV6_STATUS_NOADDRSAVAIL
:
1058 status
= "no addresses available";
1060 case DHCPV6_STATUS_NOBINDING
:
1061 status
= "no binding";
1063 case DHCPV6_STATUS_NOTONLINK
:
1064 status
= "not on-link";
1066 case DHCPV6_STATUS_NOPREFIXAVAIL
:
1067 status
= "no prefix available";
1071 char leasebuf
[256] = "";
1074 struct log_ctxt ctxt
= {.buf
= leasebuf
,
1075 .buf_len
= sizeof(leasebuf
),
1078 dhcpv6_ia_enum_addrs(iface
, a
, now
, dhcpv6_log_ia_addr
, &ctxt
);
1081 syslog(LOG_INFO
, "DHCPV6 %s %s from %s on %s: %s %s", type
, (is_pd
) ? "IA_PD" : "IA_NA",
1082 duidbuf
, iface
->name
, status
, leasebuf
);
1085 static bool dhcpv6_ia_on_link(const struct dhcpv6_ia_hdr
*ia
, struct dhcp_assignment
*a
,
1086 struct interface
*iface
)
1088 struct odhcpd_ipaddr
*addrs
= (a
&& a
->managed
) ? a
->managed
: iface
->addr6
;
1089 size_t addrlen
= (a
&& a
->managed
) ? (size_t)a
->managed_size
: iface
->addr6_len
;
1090 time_t now
= odhcpd_time();
1091 uint8_t *odata
, *end
= ((uint8_t*)ia
) + htons(ia
->len
) + 4;
1092 uint16_t otype
, olen
;
1095 dhcpv6_for_each_option((uint8_t*)&ia
[1], end
, otype
, olen
, odata
) {
1096 struct dhcpv6_ia_prefix
*p
= (struct dhcpv6_ia_prefix
*)&odata
[-4];
1097 struct dhcpv6_ia_addr
*n
= (struct dhcpv6_ia_addr
*)&odata
[-4];
1099 if ((otype
!= DHCPV6_OPT_IA_PREFIX
|| olen
< sizeof(*p
) - 4) &&
1100 (otype
!= DHCPV6_OPT_IA_ADDR
|| olen
< sizeof(*n
) - 4))
1104 for (size_t i
= 0; i
< addrlen
; ++i
) {
1105 if (!valid_addr(&addrs
[i
], now
))
1108 if (ia
->type
== htons(DHCPV6_OPT_IA_PD
)) {
1109 if (p
->prefix
< addrs
[i
].prefix
||
1110 odhcpd_bmemcmp(&p
->addr
, &addrs
[i
].addr
.in6
, addrs
[i
].prefix
))
1113 } else if (odhcpd_bmemcmp(&n
->addr
, &addrs
[i
].addr
.in6
, addrs
[i
].prefix
))
1126 ssize_t
dhcpv6_ia_handle_IAs(uint8_t *buf
, size_t buflen
, struct interface
*iface
,
1127 const struct sockaddr_in6
*addr
, const void *data
, const uint8_t *end
)
1130 struct dhcp_assignment
*first
= NULL
;
1131 const struct dhcpv6_client_header
*hdr
= data
;
1132 time_t now
= odhcpd_time();
1133 uint16_t otype
, olen
, clid_len
= 0;
1134 uint8_t *start
= (uint8_t *)&hdr
[1], *odata
;
1135 uint8_t *clid_data
= NULL
, mac
[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
1136 size_t hostname_len
= 0, response_len
= 0;
1137 bool notonlink
= false, rapid_commit
= false, accept_reconf
= false;
1138 char duidbuf
[261], hostname
[256];
1140 dhcpv6_for_each_option(start
, end
, otype
, olen
, odata
) {
1141 if (otype
== DHCPV6_OPT_CLIENTID
) {
1145 if (olen
== 14 && odata
[0] == 0 && odata
[1] == 1)
1146 memcpy(mac
, &odata
[8], sizeof(mac
));
1147 else if (olen
== 10 && odata
[0] == 0 && odata
[1] == 3)
1148 memcpy(mac
, &odata
[4], sizeof(mac
));
1151 odhcpd_hexlify(duidbuf
, odata
, olen
);
1152 } else if (otype
== DHCPV6_OPT_FQDN
&& olen
>= 2 && olen
<= 255) {
1153 uint8_t fqdn_buf
[256];
1154 memcpy(fqdn_buf
, odata
, olen
);
1155 fqdn_buf
[olen
++] = 0;
1157 if (dn_expand(&fqdn_buf
[1], &fqdn_buf
[olen
], &fqdn_buf
[1], hostname
, sizeof(hostname
)) > 0)
1158 hostname_len
= strcspn(hostname
, ".");
1159 } else if (otype
== DHCPV6_OPT_RECONF_ACCEPT
)
1160 accept_reconf
= true;
1161 else if (otype
== DHCPV6_OPT_RAPID_COMMIT
&& hdr
->msg_type
== DHCPV6_MSG_SOLICIT
)
1162 rapid_commit
= true;
1165 if (!clid_data
|| !clid_len
|| clid_len
> 130)
1168 l
= config_find_lease_by_duid(clid_data
, clid_len
);
1170 l
= config_find_lease_by_mac(mac
);
1172 dhcpv6_for_each_option(start
, end
, otype
, olen
, odata
) {
1173 bool is_pd
= (otype
== DHCPV6_OPT_IA_PD
);
1174 bool is_na
= (otype
== DHCPV6_OPT_IA_NA
);
1175 bool ia_addr_present
= false;
1176 if (!is_pd
&& !is_na
)
1179 struct dhcpv6_ia_hdr
*ia
= (struct dhcpv6_ia_hdr
*)&odata
[-4];
1180 size_t ia_response_len
= 0;
1181 uint8_t reqlen
= (is_pd
) ? 62 : 128;
1182 uint32_t reqhint
= 0;
1184 /* Parse request hint for IA-PD */
1187 uint16_t stype
, slen
;
1188 dhcpv6_for_each_option(&ia
[1], odata
+ olen
, stype
, slen
, sdata
) {
1189 if (stype
!= DHCPV6_OPT_IA_PREFIX
|| slen
< sizeof(struct dhcpv6_ia_prefix
) - 4)
1192 struct dhcpv6_ia_prefix
*p
= (struct dhcpv6_ia_prefix
*)&sdata
[-4];
1195 reqhint
= ntohl(p
->addr
.s6_addr32
[1]);
1196 if (reqlen
> 32 && reqlen
<= 64)
1197 reqhint
&= (1U << (64 - reqlen
)) - 1;
1205 uint16_t stype
, slen
;
1206 dhcpv6_for_each_option(&ia
[1], odata
+ olen
, stype
, slen
, sdata
) {
1207 if (stype
!= DHCPV6_OPT_IA_ADDR
|| slen
< sizeof(struct dhcpv6_ia_addr
) - 4)
1210 ia_addr_present
= true;
1214 /* Find assignment */
1215 struct dhcp_assignment
*c
, *a
= NULL
;
1216 list_for_each_entry(c
, &iface
->ia_assignments
, head
) {
1217 if ((c
->clid_len
== clid_len
&& !memcmp(c
->clid_data
, clid_data
, clid_len
)) &&
1218 c
->iaid
== ia
->iaid
&& (INFINITE_VALID(c
->valid_until
) || now
< c
->valid_until
) &&
1219 ((is_pd
&& (c
->flags
& OAF_DHCPV6_PD
)) || (is_na
&& (c
->flags
& OAF_DHCPV6_NA
)))) {
1223 if (a
->flags
& OAF_BOUND
)
1224 apply_lease(a
, false);
1231 if (l
&& a
&& a
->lease
!= l
) {
1236 /* Generic message handling */
1237 uint16_t status
= DHCPV6_STATUS_OK
;
1238 if (a
&& a
->managed_size
< 0)
1241 if (hdr
->msg_type
== DHCPV6_MSG_SOLICIT
||
1242 hdr
->msg_type
== DHCPV6_MSG_REQUEST
||
1243 (hdr
->msg_type
== DHCPV6_MSG_REBIND
&& !a
)) {
1244 bool assigned
= !!a
;
1247 if ((!iface
->no_dynamic_dhcp
|| (l
&& is_na
)) &&
1248 (iface
->dhcpv6_pd
|| iface
->dhcpv6_na
)) {
1249 /* Create new binding */
1250 a
= alloc_assignment(clid_len
);
1253 a
->clid_len
= clid_len
;
1254 memcpy(a
->clid_data
, clid_data
, clid_len
);
1258 a
->assigned
= is_na
&& l
? l
->hostid
: reqhint
;
1259 a
->valid_until
= now
;
1260 a
->dhcp_free_cb
= dhcpv6_ia_free_assignment
;
1262 a
->flags
= (is_pd
? OAF_DHCPV6_PD
: OAF_DHCPV6_NA
);
1265 memcpy(a
->key
, first
->key
, sizeof(a
->key
));
1267 odhcpd_urandom(a
->key
, sizeof(a
->key
));
1269 if (is_pd
&& iface
->dhcpv6_pd
)
1270 while (!(assigned
= assign_pd(iface
, a
)) &&
1271 !a
->managed_size
&& ++a
->length
<= 64);
1272 else if (is_na
&& iface
->dhcpv6_na
)
1273 assigned
= assign_na(iface
, a
);
1275 if (l
&& assigned
) {
1276 a
->flags
|= OAF_STATIC
;
1279 a
->hostname
= strdup(l
->hostname
);
1282 a
->leasetime
= l
->leasetime
;
1284 list_add(&a
->lease_list
, &l
->assignments
);
1288 if (a
->managed_size
&& !assigned
)
1294 if (!assigned
|| iface
->addr6_len
== 0)
1295 /* Set error status */
1296 status
= (is_pd
) ? DHCPV6_STATUS_NOPREFIXAVAIL
: DHCPV6_STATUS_NOADDRSAVAIL
;
1297 else if (hdr
->msg_type
== DHCPV6_MSG_REQUEST
&& !dhcpv6_ia_on_link(ia
, a
, iface
)) {
1298 /* Send NOTONLINK staus for the IA */
1299 status
= DHCPV6_STATUS_NOTONLINK
;
1301 } else if (accept_reconf
&& assigned
&& !first
&&
1302 hdr
->msg_type
!= DHCPV6_MSG_REBIND
) {
1303 size_t handshake_len
= 4;
1305 buf
[1] = DHCPV6_OPT_RECONF_ACCEPT
;
1309 if (hdr
->msg_type
== DHCPV6_MSG_REQUEST
) {
1310 struct dhcpv6_auth_reconfigure auth
= {
1311 htons(DHCPV6_OPT_AUTH
),
1312 htons(sizeof(auth
) - 4),
1314 {htonl(time(NULL
)), htonl(++serial
)},
1318 memcpy(auth
.key
, a
->key
, sizeof(a
->key
));
1319 memcpy(buf
+ handshake_len
, &auth
, sizeof(auth
));
1320 handshake_len
+= sizeof(auth
);
1324 buf
+= handshake_len
;
1325 buflen
-= handshake_len
;
1326 response_len
+= handshake_len
;
1331 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
,
1332 hdr
->msg_type
== DHCPV6_MSG_REBIND
? false : true);
1334 /* Was only a solicitation: mark binding for removal */
1335 if (assigned
&& hdr
->msg_type
== DHCPV6_MSG_SOLICIT
&& !rapid_commit
) {
1336 a
->flags
&= ~OAF_BOUND
;
1337 a
->flags
|= OAF_TENTATIVE
;
1339 /* Keep tentative assignment around for 60 seconds */
1340 a
->valid_until
= now
+ 60;
1342 } else if (assigned
&&
1343 ((hdr
->msg_type
== DHCPV6_MSG_SOLICIT
&& rapid_commit
) ||
1344 hdr
->msg_type
== DHCPV6_MSG_REQUEST
||
1345 hdr
->msg_type
== DHCPV6_MSG_REBIND
)) {
1346 if ((!(a
->flags
& OAF_STATIC
) || !a
->hostname
) && hostname_len
> 0) {
1347 a
->hostname
= realloc(a
->hostname
, hostname_len
+ 1);
1349 memcpy(a
->hostname
, hostname
, hostname_len
);
1350 a
->hostname
[hostname_len
] = 0;
1352 if (odhcpd_valid_hostname(a
->hostname
))
1353 a
->flags
&= ~OAF_BROKEN_HOSTNAME
;
1355 a
->flags
|= OAF_BROKEN_HOSTNAME
;
1358 a
->accept_reconf
= accept_reconf
;
1359 a
->flags
&= ~OAF_TENTATIVE
;
1360 a
->flags
|= OAF_BOUND
;
1361 apply_lease(a
, true);
1362 } else if (!assigned
&& a
&& a
->managed_size
== 0) {
1363 /* Cleanup failed assignment */
1367 } else if (hdr
->msg_type
== DHCPV6_MSG_RENEW
||
1368 hdr
->msg_type
== DHCPV6_MSG_RELEASE
||
1369 hdr
->msg_type
== DHCPV6_MSG_REBIND
||
1370 hdr
->msg_type
== DHCPV6_MSG_DECLINE
) {
1371 if (!a
&& hdr
->msg_type
!= DHCPV6_MSG_REBIND
) {
1372 status
= DHCPV6_STATUS_NOBINDING
;
1373 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
, false);
1374 } else if (hdr
->msg_type
== DHCPV6_MSG_RENEW
||
1375 hdr
->msg_type
== DHCPV6_MSG_REBIND
) {
1376 ia_response_len
= build_ia(buf
, buflen
, status
, ia
, a
, iface
, false);
1378 a
->flags
|= OAF_BOUND
;
1379 apply_lease(a
, true);
1381 } else if (hdr
->msg_type
== DHCPV6_MSG_RELEASE
) {
1382 a
->valid_until
= now
- 1;
1383 } else if ((a
->flags
& OAF_DHCPV6_NA
) && hdr
->msg_type
== DHCPV6_MSG_DECLINE
) {
1384 a
->flags
&= ~OAF_BOUND
;
1386 if (!(a
->flags
& OAF_STATIC
) || a
->lease
->hostid
!= a
->assigned
) {
1387 memset(a
->clid_data
, 0, a
->clid_len
);
1388 a
->valid_until
= now
+ 3600; /* Block address for 1h */
1390 a
->valid_until
= now
- 1;
1392 } else if (hdr
->msg_type
== DHCPV6_MSG_CONFIRM
) {
1393 if (ia_addr_present
&& !dhcpv6_ia_on_link(ia
, a
, iface
)) {
1398 if (!ia_addr_present
|| !a
|| !(a
->flags
& OAF_BOUND
)) {
1404 buf
+= ia_response_len
;
1405 buflen
-= ia_response_len
;
1406 response_len
+= ia_response_len
;
1407 dhcpv6_log(hdr
->msg_type
, iface
, now
, duidbuf
, is_pd
, a
, status
);
1410 switch (hdr
->msg_type
) {
1411 case DHCPV6_MSG_RELEASE
:
1412 case DHCPV6_MSG_DECLINE
:
1413 case DHCPV6_MSG_CONFIRM
:
1414 if (response_len
+ 6 < buflen
) {
1416 buf
[1] = DHCPV6_OPT_STATUS
;
1420 buf
[5] = (notonlink
) ? DHCPV6_STATUS_NOTONLINK
: DHCPV6_STATUS_OK
;
1429 dhcpv6_ia_write_statefile();
1432 return response_len
;