2 * Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License v2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
27 #include <sys/ioctl.h>
28 #include <sys/socket.h>
29 #include <netinet/in.h>
32 #include <net/ethernet.h>
38 #define ALL_DHCPV6_RELAYS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
39 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02}}}
40 #define DHCPV6_CLIENT_PORT 546
41 #define DHCPV6_SERVER_PORT 547
42 #define DHCPV6_DUID_LLADDR 3
43 #define DHCPV6_REQ_DELAY 1
45 #define DHCPV6_SOL_MAX_RT_MIN 60
46 #define DHCPV6_SOL_MAX_RT_MAX 86400
47 #define DHCPV6_INF_MAX_RT_MIN 60
48 #define DHCPV6_INF_MAX_RT_MAX 86400
50 static bool dhcpv6_response_is_valid(const void *buf, ssize_t len,
51 const uint8_t transaction[3], enum dhcpv6_msg type,
52 const struct in6_addr *daddr);
54 static int dhcpv6_parse_ia(void *opt, void *end);
56 static int dhcpv6_calc_refresh_timers(void);
57 static void dhcpv6_handle_status_code(_unused const enum dhcpv6_msg orig,
58 const uint16_t code, const void *status_msg, const int len,
60 static void dhcpv6_handle_ia_status_code(const enum dhcpv6_msg orig,
61 const struct dhcpv6_ia_hdr *ia_hdr, const uint16_t code,
62 const void *status_msg, const int len,
63 bool handled_status_codes[_DHCPV6_Status_Max],
65 static void dhcpv6_add_server_cand(const struct dhcpv6_server_cand *cand);
66 static void dhcpv6_clear_all_server_cand(void);
68 static reply_handler dhcpv6_handle_reply;
69 static reply_handler dhcpv6_handle_advert;
70 static reply_handler dhcpv6_handle_rebind_reply;
71 static reply_handler dhcpv6_handle_reconfigure;
72 static int dhcpv6_commit_advert(void);
76 // RFC 3315 - 5.5 Timeout and Delay values
77 static struct dhcpv6_retx dhcpv6_retx[_DHCPV6_MSG_MAX] = {
78 [DHCPV6_MSG_UNKNOWN] = {false, 1, 120, 0, "<POLL>",
79 dhcpv6_handle_reconfigure, NULL},
80 [DHCPV6_MSG_SOLICIT] = {true, 1, DHCPV6_SOL_MAX_RT, 0, "SOLICIT",
81 dhcpv6_handle_advert, dhcpv6_commit_advert},
82 [DHCPV6_MSG_REQUEST] = {true, 1, DHCPV6_REQ_MAX_RT, 10, "REQUEST",
83 dhcpv6_handle_reply, NULL},
84 [DHCPV6_MSG_RENEW] = {false, 10, DHCPV6_REN_MAX_RT, 0, "RENEW",
85 dhcpv6_handle_reply, NULL},
86 [DHCPV6_MSG_REBIND] = {false, 10, DHCPV6_REB_MAX_RT, 0, "REBIND",
87 dhcpv6_handle_rebind_reply, NULL},
88 [DHCPV6_MSG_RELEASE] = {false, 1, 0, 5, "RELEASE", NULL, NULL},
89 [DHCPV6_MSG_DECLINE] = {false, 1, 0, 5, "DECLINE", NULL, NULL},
90 [DHCPV6_MSG_INFO_REQ] = {true, 1, DHCPV6_INF_MAX_RT, 0, "INFOREQ",
91 dhcpv6_handle_reply, NULL},
97 static int ifindex = -1;
98 static int64_t t1 = 0, t2 = 0, t3 = 0;
101 static int request_prefix = -1;
102 static enum odhcp6c_ia_mode na_mode = IA_MODE_NONE, pd_mode = IA_MODE_NONE;
103 static bool accept_reconfig = false;
106 static uint8_t reconf_key[16];
109 static unsigned int client_options = 0;
112 int init_dhcpv6(const char *ifname, unsigned int options, int sol_timeout)
114 client_options = options;
115 dhcpv6_retx[DHCPV6_MSG_SOLICIT].max_timeo = sol_timeout;
117 sock = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
123 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
124 if (ioctl(sock, SIOCGIFINDEX, &ifr) < 0)
126 ifindex = ifr.ifr_ifindex;
128 // Create client DUID
129 size_t client_id_len;
130 odhcp6c_get_state(STATE_CLIENT_ID, &client_id_len);
131 if (client_id_len == 0) {
132 uint8_t duid[14] = {0, DHCPV6_OPT_CLIENTID, 0, 10, 0,
133 DHCPV6_DUID_LLADDR, 0, 1};
135 if (ioctl(sock, SIOCGIFHWADDR, &ifr) >= 0)
136 memcpy(&duid[8], ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
138 uint8_t zero[ETHER_ADDR_LEN] = {0, 0, 0, 0, 0, 0};
139 struct ifreq ifs[100], *ifp, *ifend;
142 ifc.ifc_len = sizeof(ifs);
144 if (!memcmp(&duid[8], zero, ETHER_ADDR_LEN) &&
145 ioctl(sock, SIOCGIFCONF, &ifc) >= 0) {
146 // If our interface doesn't have an address...
147 ifend = ifs + (ifc.ifc_len / sizeof(struct ifreq));
148 for (ifp = ifc.ifc_req; ifp < ifend &&
149 !memcmp(&duid[8], zero, ETHER_ADDR_LEN); ifp++) {
150 memcpy(ifr.ifr_name, ifp->ifr_name,
151 sizeof(ifr.ifr_name));
152 if (ioctl(sock, SIOCGIFHWADDR, &ifr) < 0)
155 memcpy(&duid[8], ifr.ifr_hwaddr.sa_data,
160 odhcp6c_add_state(STATE_CLIENT_ID, duid, sizeof(duid));
164 if (!(client_options & DHCPV6_STRICT_OPTIONS)) {
166 htons(DHCPV6_OPT_SIP_SERVER_D),
167 htons(DHCPV6_OPT_SIP_SERVER_A),
168 htons(DHCPV6_OPT_DNS_SERVERS),
169 htons(DHCPV6_OPT_DNS_DOMAIN),
170 htons(DHCPV6_OPT_SNTP_SERVERS),
171 htons(DHCPV6_OPT_NTP_SERVER),
172 htons(DHCPV6_OPT_AFTR_NAME),
173 htons(DHCPV6_OPT_PD_EXCLUDE),
174 htons(DHCPV6_OPT_SOL_MAX_RT),
175 htons(DHCPV6_OPT_INF_MAX_RT),
176 #ifdef EXT_PREFIX_CLASS
177 htons(DHCPV6_OPT_PREFIX_CLASS),
180 odhcp6c_add_state(STATE_ORO, oro, sizeof(oro));
183 // Configure IPv6-options
185 setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
186 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
187 setsockopt(sock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &val, sizeof(val));
189 setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &val, sizeof(val));
190 setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname));
192 struct sockaddr_in6 client_addr = { .sin6_family = AF_INET6,
193 .sin6_port = htons(DHCPV6_CLIENT_PORT), .sin6_flowinfo = 0 };
194 if (bind(sock, (struct sockaddr*)&client_addr, sizeof(client_addr)) < 0)
206 IOV_VENDOR_CLASS_HDR,
218 void dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na, enum odhcp6c_ia_mode pd)
224 static void dhcpv6_send(enum dhcpv6_msg type, uint8_t trid[3], uint32_t ecs)
228 gethostname(fqdn_buf, sizeof(fqdn_buf));
235 size_t fqdn_len = 5 + dn_comp(fqdn_buf, fqdn.data,
236 sizeof(fqdn.data), NULL, NULL);
237 fqdn.type = htons(DHCPV6_OPT_FQDN);
238 fqdn.len = htons(fqdn_len - 4);
244 void *cl_id = odhcp6c_get_state(STATE_CLIENT_ID, &cl_id_len);
248 void *srv_id = odhcp6c_get_state(STATE_SERVER_ID, &srv_id_len);
251 size_t ia_pd_entries, ia_pd_len = 0;
254 if (type == DHCPV6_MSG_SOLICIT) {
255 odhcp6c_clear_state(STATE_IA_PD);
257 struct odhcp6c_request_prefix *request_prefixes = odhcp6c_get_state(STATE_IA_PD_INIT, &n_prefixes);
258 n_prefixes /= sizeof(struct odhcp6c_request_prefix);
260 ia_pd = alloca(n_prefixes * (sizeof(struct dhcpv6_ia_hdr) + sizeof(struct dhcpv6_ia_prefix)));
262 for (size_t i = 0; i < n_prefixes; i++) {
263 struct dhcpv6_ia_hdr hdr_ia_pd = {
264 htons(DHCPV6_OPT_IA_PD),
265 htons(sizeof(hdr_ia_pd) - 4 + sizeof(struct dhcpv6_ia_prefix)),
266 request_prefixes[i].iaid, 0, 0
268 struct dhcpv6_ia_prefix pref = {
269 .type = htons(DHCPV6_OPT_IA_PREFIX),
270 .len = htons(25), .prefix = request_prefixes[i].length
272 memcpy(ia_pd + ia_pd_len, &hdr_ia_pd, sizeof(hdr_ia_pd));
273 ia_pd_len += sizeof(hdr_ia_pd);
274 memcpy(ia_pd + ia_pd_len, &pref, sizeof(pref));
275 ia_pd_len += sizeof(pref);
278 struct odhcp6c_entry *e = odhcp6c_get_state(STATE_IA_PD, &ia_pd_entries);
279 ia_pd_entries /= sizeof(*e);
281 // we're too lazy to count our distinct IAIDs,
282 // so just allocate maximally needed space
283 ia_pd = alloca(ia_pd_entries * (sizeof(struct dhcpv6_ia_prefix) + 10 +
284 sizeof(struct dhcpv6_ia_hdr)));
286 for (size_t i = 0; i < ia_pd_entries; ++i) {
287 uint32_t iaid = e[i].iaid;
289 // check if this is an unprocessed IAID and skip if not.
291 for (int j = i-1; j >= 0; j--) {
292 if (e[j].iaid == iaid) {
302 struct dhcpv6_ia_hdr hdr_ia_pd = {
303 htons(DHCPV6_OPT_IA_PD),
304 htons(sizeof(hdr_ia_pd) - 4),
308 memcpy(ia_pd + ia_pd_len, &hdr_ia_pd, sizeof(hdr_ia_pd));
309 struct dhcpv6_ia_hdr *hdr = (struct dhcpv6_ia_hdr *) (ia_pd + ia_pd_len);
310 ia_pd_len += sizeof(hdr_ia_pd);
312 for (size_t j = i; j < ia_pd_entries; j++) {
313 if (e[j].iaid != iaid)
317 if (e[j].priority > 0)
318 ex_len = ((e[j].priority - e[j].length - 1) / 8) + 6;
320 struct dhcpv6_ia_prefix p = {
321 .type = htons(DHCPV6_OPT_IA_PREFIX),
322 .len = htons(sizeof(p) - 4U + ex_len),
323 .prefix = e[j].length,
327 memcpy(ia_pd + ia_pd_len, &p, sizeof(p));
328 ia_pd_len += sizeof(p);
331 ia_pd[ia_pd_len++] = 0;
332 ia_pd[ia_pd_len++] = DHCPV6_OPT_PD_EXCLUDE;
333 ia_pd[ia_pd_len++] = 0;
334 ia_pd[ia_pd_len++] = ex_len - 4;
335 ia_pd[ia_pd_len++] = e[j].priority;
337 uint32_t excl = ntohl(e[j].router.s6_addr32[1]);
338 excl >>= (64 - e[j].priority);
339 excl <<= 8 - ((e[j].priority - e[j].length) % 8);
341 for (size_t i = ex_len - 5; i > 0; --i, excl >>= 8)
342 ia_pd[ia_pd_len + i] = excl & 0xff;
343 ia_pd_len += ex_len - 5;
346 hdr->len = htons(ntohs(hdr->len) + ntohs(p.len) + 4U);
351 if (ia_pd_entries > 0)
355 size_t ia_na_entries, ia_na_len = 0;
357 struct odhcp6c_entry *e = odhcp6c_get_state(STATE_IA_NA, &ia_na_entries);
358 ia_na_entries /= sizeof(*e);
360 struct dhcpv6_ia_hdr hdr_ia_na = {
361 htons(DHCPV6_OPT_IA_NA),
362 htons(sizeof(hdr_ia_na) - 4),
366 struct dhcpv6_ia_addr pa[ia_na_entries];
367 for (size_t i = 0; i < ia_na_entries; ++i) {
368 pa[i].type = htons(DHCPV6_OPT_IA_ADDR);
369 pa[i].len = htons(sizeof(pa[i]) - 4U);
370 pa[i].addr = e[i].target;
376 ia_na_len = sizeof(pa);
377 hdr_ia_na.len = htons(ntohs(hdr_ia_na.len) + ia_na_len);
379 // Reconfigure Accept
383 } reconf_accept = {htons(DHCPV6_OPT_RECONF_ACCEPT), 0};
385 // Request Information Refresh
386 uint16_t oro_refresh = htons(DHCPV6_OPT_INFO_REFRESH);
388 // Build vendor-class option
389 size_t vendor_class_len, user_class_len;
390 struct dhcpv6_vendorclass *vendor_class = odhcp6c_get_state(STATE_VENDORCLASS, &vendor_class_len);
391 void *user_class = odhcp6c_get_state(STATE_USERCLASS, &user_class_len);
396 } vendor_class_hdr = {htons(DHCPV6_OPT_VENDOR_CLASS), htons(vendor_class_len)};
401 } user_class_hdr = {htons(DHCPV6_OPT_USER_CLASS), htons(user_class_len)};
405 void *oro = odhcp6c_get_state(STATE_ORO, &oro_len);
409 uint16_t elapsed_type;
410 uint16_t elapsed_len;
411 uint16_t elapsed_value;
415 type, {trid[0], trid[1], trid[2]},
416 htons(DHCPV6_OPT_ELAPSED), htons(2),
417 htons((ecs > 0xffff) ? 0xffff : ecs),
418 htons(DHCPV6_OPT_ORO), htons(oro_len),
421 struct iovec iov[IOV_TOTAL] = {
422 [IOV_HDR] = {&hdr, sizeof(hdr)},
423 [IOV_ORO] = {oro, oro_len},
424 [IOV_ORO_REFRESH] = {&oro_refresh, 0},
425 [IOV_CL_ID] = {cl_id, cl_id_len},
426 [IOV_SRV_ID] = {srv_id, srv_id_len},
427 [IOV_VENDOR_CLASS_HDR] = {&vendor_class_hdr, vendor_class_len ? sizeof(vendor_class_hdr) : 0},
428 [IOV_VENDOR_CLASS] = {vendor_class, vendor_class_len},
429 [IOV_USER_CLASS_HDR] = {&user_class_hdr, user_class_len ? sizeof(user_class_hdr) : 0},
430 [IOV_USER_CLASS] = {user_class, user_class_len},
431 [IOV_RECONF_ACCEPT] = {&reconf_accept, sizeof(reconf_accept)},
432 [IOV_FQDN] = {&fqdn, fqdn_len},
433 [IOV_HDR_IA_NA] = {&hdr_ia_na, sizeof(hdr_ia_na)},
434 [IOV_IA_NA] = {ia_na, ia_na_len},
435 [IOV_IA_PD] = {ia_pd, ia_pd_len},
438 size_t cnt = IOV_TOTAL;
439 if (type == DHCPV6_MSG_INFO_REQ) {
441 iov[IOV_ORO_REFRESH].iov_len = sizeof(oro_refresh);
442 hdr.oro_len = htons(oro_len + sizeof(oro_refresh));
443 } else if (!request_prefix) {
447 // Disable IAs if not used
448 if (type != DHCPV6_MSG_SOLICIT) {
449 iov[IOV_RECONF_ACCEPT].iov_len = 0;
451 iov[IOV_HDR_IA_NA].iov_len = 0;
454 if (na_mode == IA_MODE_NONE)
455 iov[IOV_HDR_IA_NA].iov_len = 0;
457 if (!(client_options & DHCPV6_ACCEPT_RECONFIGURE))
458 iov[IOV_RECONF_ACCEPT].iov_len = 0;
460 if (!(client_options & DHCPV6_CLIENT_FQDN))
461 iov[IOV_FQDN].iov_len = 0;
463 struct sockaddr_in6 srv = {AF_INET6, htons(DHCPV6_SERVER_PORT),
464 0, ALL_DHCPV6_RELAYS, ifindex};
465 struct msghdr msg = {&srv, sizeof(srv), iov, cnt, NULL, 0, 0};
467 sendmsg(sock, &msg, 0);
471 static int64_t dhcpv6_rand_delay(int64_t time)
474 odhcp6c_random(&random, sizeof(random));
475 return (time * ((int64_t)random % 1000LL)) / 10000LL;
479 int dhcpv6_request(enum dhcpv6_msg type)
482 uint64_t timeout = UINT32_MAX;
483 struct dhcpv6_retx *retx = &dhcpv6_retx[type];
486 struct timespec ts = {0, 0};
487 ts.tv_nsec = dhcpv6_rand_delay(10 * DHCPV6_REQ_DELAY);
488 nanosleep(&ts, NULL);
491 if (type == DHCPV6_MSG_UNKNOWN)
493 else if (type == DHCPV6_MSG_RENEW)
494 timeout = (t2 > t1) ? t2 - t1 : ((t1 == UINT32_MAX) ? UINT32_MAX : 0);
495 else if (type == DHCPV6_MSG_REBIND)
496 timeout = (t3 > t2) ? t3 - t2 : ((t2 == UINT32_MAX) ? UINT32_MAX : 0);
501 syslog(LOG_NOTICE, "Starting %s transaction (timeout %llus, max rc %d)",
502 retx->name, (unsigned long long)timeout, retx->max_rc);
504 uint64_t start = odhcp6c_get_milli_time(), round_start = start, elapsed;
506 // Generate transaction ID
507 uint8_t trid[3] = {0, 0, 0};
508 if (type != DHCPV6_MSG_UNKNOWN)
509 odhcp6c_random(trid, sizeof(trid));
515 int64_t delay = dhcpv6_rand_delay(retx->init_timeo * 1000);
517 // First RT MUST be strictly greater than IRT for solicit messages (RFC3313 17.1.2)
518 while (type == DHCPV6_MSG_SOLICIT && delay <= 0)
519 delay = dhcpv6_rand_delay(retx->init_timeo * 1000);
521 rto = (retx->init_timeo * 1000 + delay);
524 rto = (2 * rto + dhcpv6_rand_delay(rto));
526 if (retx->max_timeo && (rto >= retx->max_timeo * 1000))
527 rto = retx->max_timeo * 1000 +
528 dhcpv6_rand_delay(retx->max_timeo * 1000);
530 // Calculate end for this round and elapsed time
531 uint64_t round_end = round_start + rto;
532 elapsed = round_start - start;
534 // Don't wait too long if timeout differs from infinite
535 if ((timeout != UINT32_MAX) && (round_end - start > timeout * 1000))
536 round_end = timeout * 1000 + start;
538 // Built and send package
539 if (type != DHCPV6_MSG_UNKNOWN) {
540 if (type != DHCPV6_MSG_SOLICIT)
541 syslog(LOG_NOTICE, "Send %s message (elapsed %llums, rc %d)",
542 retx->name, (unsigned long long)elapsed, rc);
543 dhcpv6_send(type, trid, elapsed / 10);
548 for (; len < 0 && (round_start < round_end);
549 round_start = odhcp6c_get_milli_time()) {
550 uint8_t buf[1536], cmsg_buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
551 struct iovec iov = {buf, sizeof(buf)};
552 struct msghdr msg = {NULL, 0, &iov, 1,
553 cmsg_buf, sizeof(cmsg_buf), 0};
554 struct in6_pktinfo *pktinfo = NULL;
556 // Check for pending signal
557 if (odhcp6c_signal_process())
560 // Set timeout for receiving
561 uint64_t t = round_end - round_start;
562 struct timeval tv = {t / 1000, (t % 1000) * 1000};
563 setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
567 len = recvmsg(sock, &msg, 0);
571 for (struct cmsghdr *ch = CMSG_FIRSTHDR(&msg); ch != NULL;
572 ch = CMSG_NXTHDR(&msg, ch)) {
573 if (ch->cmsg_level == SOL_IPV6 &&
574 ch->cmsg_type == IPV6_PKTINFO) {
575 pktinfo = (struct in6_pktinfo *)CMSG_DATA(ch);
580 if (pktinfo == NULL) {
585 if (!dhcpv6_response_is_valid(buf, len, trid,
586 type, &pktinfo->ipi6_addr)) {
591 uint8_t *opt = &buf[4];
592 uint8_t *opt_end = opt + len - 4;
594 round_start = odhcp6c_get_milli_time();
595 elapsed = round_start - start;
596 syslog(LOG_NOTICE, "Got a valid reply after "
597 "%llums", (unsigned long long)elapsed);
599 if (retx->handler_reply)
600 len = retx->handler_reply(type, rc, opt, opt_end);
602 if (len > 0 && round_end - round_start > 1000)
603 round_end = 1000 + round_start;
607 if (retx->handler_finish)
608 len = retx->handler_finish();
609 } while (len < 0 && ((timeout == UINT32_MAX) || (elapsed / 1000 < timeout)) &&
610 (!retx->max_rc || rc < retx->max_rc));
614 // Message validation checks according to RFC3315 chapter 15
615 static bool dhcpv6_response_is_valid(const void *buf, ssize_t len,
616 const uint8_t transaction[3], enum dhcpv6_msg type,
617 const struct in6_addr *daddr)
619 const struct dhcpv6_header *rep = buf;
620 if (len < (ssize_t)sizeof(*rep) || memcmp(rep->tr_id,
621 transaction, sizeof(rep->tr_id)))
622 return false; // Invalid reply
624 if (type == DHCPV6_MSG_SOLICIT) {
625 if (rep->msg_type != DHCPV6_MSG_ADVERT &&
626 rep->msg_type != DHCPV6_MSG_REPLY)
628 } else if (type == DHCPV6_MSG_UNKNOWN) {
629 if (!accept_reconfig || rep->msg_type != DHCPV6_MSG_RECONF)
631 } else if (rep->msg_type != DHCPV6_MSG_REPLY) {
635 uint8_t *end = ((uint8_t*)buf) + len, *odata = NULL,
636 rcmsg = DHCPV6_MSG_UNKNOWN;
637 uint16_t otype, olen = UINT16_MAX;
638 bool clientid_ok = false, serverid_ok = false, rcauth_ok = false,
639 ia_present = false, options_valid = true;
641 size_t client_id_len, server_id_len;
642 void *client_id = odhcp6c_get_state(STATE_CLIENT_ID, &client_id_len);
643 void *server_id = odhcp6c_get_state(STATE_SERVER_ID, &server_id_len);
645 dhcpv6_for_each_option(&rep[1], end, otype, olen, odata) {
646 if (otype == DHCPV6_OPT_CLIENTID) {
647 clientid_ok = (olen + 4U == client_id_len) && !memcmp(
648 &odata[-4], client_id, client_id_len);
649 } else if (otype == DHCPV6_OPT_SERVERID) {
651 serverid_ok = (olen + 4U == server_id_len) && !memcmp(
652 &odata[-4], server_id, server_id_len);
655 } else if (otype == DHCPV6_OPT_AUTH && olen == -4 +
656 sizeof(struct dhcpv6_auth_reconfigure)) {
657 struct dhcpv6_auth_reconfigure *r = (void*)&odata[-4];
658 if (r->protocol != 3 || r->algorithm != 1 || r->reconf_type != 2)
662 uint8_t serverhash[16], secretbytes[16], hash[16];
663 memcpy(serverhash, r->key, sizeof(serverhash));
664 memset(r->key, 0, sizeof(r->key));
665 memcpy(secretbytes, reconf_key, sizeof(secretbytes));
667 for (size_t i = 0; i < sizeof(secretbytes); ++i)
668 secretbytes[i] ^= 0x36;
671 md5_hash(secretbytes, sizeof(secretbytes), &md5);
672 md5_hash(buf, len, &md5);
675 for (size_t i = 0; i < sizeof(secretbytes); ++i) {
676 secretbytes[i] ^= 0x36;
677 secretbytes[i] ^= 0x5c;
681 md5_hash(secretbytes, sizeof(secretbytes), &md5);
682 md5_hash(hash, 16, &md5);
685 rcauth_ok = !memcmp(hash, serverhash, sizeof(hash));
686 } else if (otype == DHCPV6_OPT_RECONF_MESSAGE && olen == 1) {
688 } else if ((otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA)) {
690 if (olen < sizeof(struct dhcpv6_ia_hdr))
691 options_valid = false;
693 else if ((otype == DHCPV6_OPT_IA_ADDR) || (otype == DHCPV6_OPT_IA_PREFIX) ||
694 (otype == DHCPV6_OPT_PD_EXCLUDE)) {
695 // Options are not allowed on global level
696 options_valid = false;
700 if (!options_valid || ((odata + olen) > end))
703 if (type == DHCPV6_MSG_INFO_REQ && ia_present)
706 if (rep->msg_type == DHCPV6_MSG_RECONF) {
707 if ((rcmsg != DHCPV6_MSG_RENEW && rcmsg != DHCPV6_MSG_INFO_REQ) ||
708 (rcmsg == DHCPV6_MSG_INFO_REQ && ia_present) ||
709 !rcauth_ok || IN6_IS_ADDR_MULTICAST(daddr))
713 return clientid_ok && serverid_ok;
717 int dhcpv6_poll_reconfigure(void)
719 int ret = dhcpv6_request(DHCPV6_MSG_UNKNOWN);
721 ret = dhcpv6_request(ret);
727 static int dhcpv6_handle_reconfigure(_unused enum dhcpv6_msg orig, const int rc,
728 const void *opt, const void *end)
730 uint16_t otype, olen;
731 uint8_t *odata, msg = DHCPV6_MSG_RENEW;
732 dhcpv6_for_each_option(opt, end, otype, olen, odata)
733 if (otype == DHCPV6_OPT_RECONF_MESSAGE && olen == 1 && (
734 odata[0] == DHCPV6_MSG_RENEW ||
735 odata[0] == DHCPV6_MSG_INFO_REQ))
738 dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, rc, NULL, NULL);
743 // Collect all advertised servers
744 static int dhcpv6_handle_advert(enum dhcpv6_msg orig, const int rc,
745 const void *opt, const void *end)
747 uint16_t olen, otype;
748 uint8_t *odata, pref = 0;
749 struct dhcpv6_server_cand cand = {false, false, 0, 0, {0},
751 DHCPV6_INF_MAX_RT, NULL, NULL, 0, 0};
752 bool have_na = false;
755 dhcpv6_for_each_option(opt, end, otype, olen, odata) {
756 if (orig == DHCPV6_MSG_SOLICIT &&
757 (otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA) &&
758 olen > sizeof(struct dhcpv6_ia_hdr)) {
759 struct dhcpv6_ia_hdr *ia_hdr = (void*)(&odata[-4]);
760 dhcpv6_parse_ia(ia_hdr, odata + olen + sizeof(*ia_hdr));
763 if (otype == DHCPV6_OPT_SERVERID && olen <= 130) {
764 memcpy(cand.duid, odata, olen);
765 cand.duid_len = olen;
766 } else if (otype == DHCPV6_OPT_STATUS && olen >= 2) {
767 int error = ((int)odata[0] << 8 | (int)odata[1]);
770 case DHCPV6_NoPrefixAvail:
771 // Status code on global level
772 cand.preference -= 2000;
778 } else if (otype == DHCPV6_OPT_PREF && olen >= 1 &&
779 cand.preference >= 0) {
780 cand.preference = pref = odata[0];
781 } else if (otype == DHCPV6_OPT_RECONF_ACCEPT) {
782 cand.wants_reconfigure = true;
783 } else if (otype == DHCPV6_OPT_SOL_MAX_RT && olen == 4) {
784 uint32_t sol_max_rt = ntohl(*((uint32_t *)odata));
785 if (sol_max_rt >= DHCPV6_SOL_MAX_RT_MIN &&
786 sol_max_rt <= DHCPV6_SOL_MAX_RT_MAX)
787 cand.sol_max_rt = sol_max_rt;
788 } else if (otype == DHCPV6_OPT_INF_MAX_RT && olen == 4) {
789 uint32_t inf_max_rt = ntohl(*((uint32_t *)odata));
790 if (inf_max_rt >= DHCPV6_INF_MAX_RT_MIN &&
791 inf_max_rt <= DHCPV6_INF_MAX_RT_MAX)
792 cand.inf_max_rt = inf_max_rt;
793 } else if (otype == DHCPV6_OPT_IA_PD && request_prefix) {
794 struct dhcpv6_ia_hdr *h = (struct dhcpv6_ia_hdr*)&odata[-4];
795 uint8_t *oend = odata + olen, *d;
796 dhcpv6_for_each_option(&h[1], oend, otype, olen, d) {
797 if (otype == DHCPV6_OPT_IA_PREFIX && (olen + 4) >=
798 (uint16_t)sizeof(struct dhcpv6_ia_prefix)) {
799 struct dhcpv6_ia_prefix *p = (struct dhcpv6_ia_prefix*)&d[-4];
803 } else if (otype == DHCPV6_OPT_IA_NA) {
804 struct dhcpv6_ia_hdr *h = (struct dhcpv6_ia_hdr*)&odata[-4];
805 uint8_t *oend = odata + olen, *d;
806 dhcpv6_for_each_option(&h[1], oend, otype, olen, d)
807 if (otype == DHCPV6_OPT_IA_ADDR)
812 if ((!have_na && na_mode == IA_MODE_FORCE) ||
813 (!have_pd && pd_mode == IA_MODE_FORCE)) {
815 * RFC7083 states to process the SOL_MAX_RT and
816 * INF_MAX_RT options even if the DHCPv6 server
817 * did not propose any IA_NA and/or IA_PD
819 dhcpv6_retx[DHCPV6_MSG_SOLICIT].max_timeo = cand.sol_max_rt;
820 dhcpv6_retx[DHCPV6_MSG_INFO_REQ].max_timeo = cand.inf_max_rt;
824 if (na_mode != IA_MODE_NONE && !have_na) {
825 cand.has_noaddravail = true;
826 cand.preference -= 1000;
829 if (pd_mode != IA_MODE_NONE) {
831 cand.preference += 2000 + (128 - have_pd);
833 cand.preference -= 2000;
836 if (cand.duid_len > 0) {
837 cand.ia_na = odhcp6c_move_state(STATE_IA_NA, &cand.ia_na_len);
838 cand.ia_pd = odhcp6c_move_state(STATE_IA_PD, &cand.ia_pd_len);
839 dhcpv6_add_server_cand(&cand);
842 return (rc > 1 || (pref == 255 && cand.preference > 0)) ? 1 : -1;
846 static int dhcpv6_commit_advert(void)
848 return dhcpv6_promote_server_cand();
852 static int dhcpv6_handle_rebind_reply(enum dhcpv6_msg orig, const int rc,
853 const void *opt, const void *end)
855 dhcpv6_handle_advert(orig, rc, opt, end);
856 if (dhcpv6_commit_advert() < 0)
859 return dhcpv6_handle_reply(orig, rc, opt, end);
863 static int dhcpv6_handle_reply(enum dhcpv6_msg orig, _unused const int rc,
864 const void *opt, const void *end)
867 uint16_t otype, olen;
868 uint32_t refresh = UINT32_MAX;
870 bool handled_status_codes[_DHCPV6_Status_Max] = { false, };
874 if (orig == DHCPV6_MSG_UNKNOWN) {
875 static time_t last_update = 0;
876 time_t now = odhcp6c_get_milli_time() / 1000;
878 uint32_t elapsed = (last_update > 0) ? now - last_update : 0;
881 if (t1 != UINT32_MAX)
884 if (t2 != UINT32_MAX)
887 if (t3 != UINT32_MAX)
900 if (orig == DHCPV6_MSG_REQUEST && !odhcp6c_is_bound()) {
901 // Delete NA and PD we have in the state from the Advert
902 odhcp6c_clear_state(STATE_IA_NA);
903 odhcp6c_clear_state(STATE_IA_PD);
907 odhcp6c_clear_state(STATE_DNS);
908 odhcp6c_clear_state(STATE_SEARCH);
909 odhcp6c_clear_state(STATE_SNTP_IP);
910 odhcp6c_clear_state(STATE_NTP_IP);
911 odhcp6c_clear_state(STATE_NTP_FQDN);
912 odhcp6c_clear_state(STATE_SIP_IP);
913 odhcp6c_clear_state(STATE_SIP_FQDN);
914 odhcp6c_clear_state(STATE_AFTR_NAME);
917 // Parse and find all matching IAs
918 dhcpv6_for_each_option(opt, end, otype, olen, odata) {
919 if ((otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA)
920 && olen > sizeof(struct dhcpv6_ia_hdr)) {
921 struct dhcpv6_ia_hdr *ia_hdr = (void*)(&odata[-4]);
924 if (ia_hdr->iaid != 1 && otype == DHCPV6_OPT_IA_NA)
927 uint16_t code = DHCPV6_Success;
928 uint16_t stype, slen;
930 // Get and handle status code
931 dhcpv6_for_each_option(&ia_hdr[1], odata + olen,
932 stype, slen, sdata) {
933 if (stype == DHCPV6_OPT_STATUS && slen >= 2) {
934 uint8_t *mdata = (slen > 2) ? &sdata[2] : NULL;
935 uint16_t mlen = (slen > 2) ? slen - 2 : 0;
937 code = ((int)sdata[0]) << 8 | ((int)sdata[1]);
939 if (code == DHCPV6_Success)
942 dhcpv6_handle_ia_status_code(orig, ia_hdr,
943 code, mdata, mlen, handled_status_codes, &ret);
952 if (code != DHCPV6_Success)
955 dhcpv6_parse_ia(ia_hdr, odata + olen + sizeof(*ia_hdr));
956 } else if (otype == DHCPV6_OPT_STATUS && olen >= 2) {
957 uint8_t *mdata = (olen > 2) ? &odata[2] : NULL;
958 uint16_t mlen = (olen > 2) ? olen - 2 : 0;
959 uint16_t code = ((int)odata[0]) << 8 | ((int)odata[1]);
961 dhcpv6_handle_status_code(orig, code, mdata, mlen, &ret);
963 else if (otype == DHCPV6_OPT_DNS_SERVERS) {
965 odhcp6c_add_state(STATE_DNS, odata, olen);
966 } else if (otype == DHCPV6_OPT_DNS_DOMAIN) {
967 odhcp6c_add_state(STATE_SEARCH, odata, olen);
968 } else if (otype == DHCPV6_OPT_SNTP_SERVERS) {
970 odhcp6c_add_state(STATE_SNTP_IP, odata, olen);
971 } else if (otype == DHCPV6_OPT_NTP_SERVER) {
972 uint16_t stype, slen;
974 // Test status and bail if error
975 dhcpv6_for_each_option(odata, odata + olen,
976 stype, slen, sdata) {
977 if (slen == 16 && (stype == NTP_MC_ADDR ||
978 stype == NTP_SRV_ADDR))
979 odhcp6c_add_state(STATE_NTP_IP,
981 else if (slen > 0 && stype == NTP_SRV_FQDN)
982 odhcp6c_add_state(STATE_NTP_FQDN,
985 } else if (otype == DHCPV6_OPT_SIP_SERVER_A) {
987 odhcp6c_add_state(STATE_SIP_IP, odata, olen);
988 } else if (otype == DHCPV6_OPT_SIP_SERVER_D) {
989 odhcp6c_add_state(STATE_SIP_FQDN, odata, olen);
990 } else if (otype == DHCPV6_OPT_INFO_REFRESH && olen >= 4) {
991 refresh = ntohl(*((uint32_t*)odata));
992 } else if (otype == DHCPV6_OPT_AUTH && olen == -4 +
993 sizeof(struct dhcpv6_auth_reconfigure)) {
994 struct dhcpv6_auth_reconfigure *r = (void*)&odata[-4];
995 if (r->protocol == 3 && r->algorithm == 1 &&
997 memcpy(reconf_key, r->key, sizeof(r->key));
998 } else if (otype == DHCPV6_OPT_AFTR_NAME && olen > 3) {
1000 odhcp6c_get_state(STATE_AFTR_NAME, &cur_len);
1002 odhcp6c_add_state(STATE_AFTR_NAME, odata, olen);
1003 } else if (otype == DHCPV6_OPT_SOL_MAX_RT && olen == 4) {
1004 uint32_t sol_max_rt = ntohl(*((uint32_t *)odata));
1005 if (sol_max_rt >= DHCPV6_SOL_MAX_RT_MIN &&
1006 sol_max_rt <= DHCPV6_SOL_MAX_RT_MAX)
1007 dhcpv6_retx[DHCPV6_MSG_SOLICIT].max_timeo = sol_max_rt;
1008 } else if (otype == DHCPV6_OPT_INF_MAX_RT && olen == 4) {
1009 uint32_t inf_max_rt = ntohl(*((uint32_t *)odata));
1010 if (inf_max_rt >= DHCPV6_INF_MAX_RT_MIN &&
1011 inf_max_rt <= DHCPV6_INF_MAX_RT_MAX)
1012 dhcpv6_retx[DHCPV6_MSG_INFO_REQ].max_timeo = inf_max_rt;
1013 }else if (otype != DHCPV6_OPT_CLIENTID &&
1014 otype != DHCPV6_OPT_SERVERID) {
1015 odhcp6c_add_state(STATE_CUSTOM_OPTS,
1016 &odata[-4], olen + 4);
1020 if (orig != DHCPV6_MSG_INFO_REQ) {
1021 // Update refresh timers if no fatal status code was received
1022 if ((ret > 0) && dhcpv6_calc_refresh_timers()) {
1024 case DHCPV6_MSG_RENEW:
1025 // Send further renews if T1 is not set
1029 case DHCPV6_MSG_REBIND:
1030 // Send further rebinds if T1 and T2 is not set
1035 case DHCPV6_MSG_REQUEST:
1036 // All server candidates can be cleared if not yet bound
1037 if (!odhcp6c_is_bound())
1038 dhcpv6_clear_all_server_cand();
1046 // All server candidates can be cleared if not yet bound
1047 if (!odhcp6c_is_bound())
1048 dhcpv6_clear_all_server_cand();
1057 static int dhcpv6_parse_ia(void *opt, void *end)
1059 struct dhcpv6_ia_hdr *ia_hdr = (struct dhcpv6_ia_hdr *)opt;
1062 uint16_t otype, olen;
1065 t1 = ntohl(ia_hdr->t1);
1066 t2 = ntohl(ia_hdr->t2);
1071 // Update address IA
1072 dhcpv6_for_each_option(&ia_hdr[1], end, otype, olen, odata) {
1073 struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT, 0, 0,
1074 IN6ADDR_ANY_INIT, 0, 0, 0, 0, 0, 0};
1076 entry.iaid = ia_hdr->iaid;
1078 if (otype == DHCPV6_OPT_IA_PREFIX) {
1079 struct dhcpv6_ia_prefix *prefix = (void*)&odata[-4];
1080 if (olen + 4U < sizeof(*prefix))
1083 entry.valid = ntohl(prefix->valid);
1084 entry.preferred = ntohl(prefix->preferred);
1086 if (entry.preferred > entry.valid)
1089 entry.t1 = (t1 ? t1 : (entry.preferred != UINT32_MAX ? 0.5 * entry.preferred : UINT32_MAX));
1090 entry.t2 = (t2 ? t2 : (entry.preferred != UINT32_MAX ? 0.8 * entry.preferred : UINT32_MAX));
1091 if (entry.t1 > entry.t2)
1092 entry.t1 = entry.t2;
1094 entry.length = prefix->prefix;
1095 entry.target = prefix->addr;
1096 uint16_t stype, slen;
1099 #ifdef EXT_PREFIX_CLASS
1100 // Find prefix class, if any
1101 dhcpv6_for_each_option(&prefix[1], odata + olen,
1103 if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
1104 entry.class = sdata[0] << 8 | sdata[1];
1109 dhcpv6_for_each_option(odata + sizeof(*prefix) - 4U,
1110 odata + olen, stype, slen, sdata) {
1111 if (stype != DHCPV6_OPT_PD_EXCLUDE || slen < 2)
1114 uint8_t elen = sdata[0];
1118 if (elen <= 32 || elen <= entry.length) {
1124 uint8_t bytes = ((elen - entry.length - 1) / 8) + 1;
1125 if (slen <= bytes) {
1130 uint32_t exclude = 0;
1132 exclude = exclude << 8 | sdata[bytes];
1135 exclude >>= 8 - ((elen - entry.length) % 8);
1136 exclude <<= 64 - elen;
1138 // Abusing router & priority fields for exclusion
1139 entry.router = entry.target;
1140 entry.router.s6_addr32[1] |= htonl(exclude);
1141 entry.priority = elen;
1145 odhcp6c_update_entry(STATE_IA_PD, &entry);
1150 memset(&entry.router, 0, sizeof(entry.router));
1151 } else if (otype == DHCPV6_OPT_IA_ADDR) {
1152 struct dhcpv6_ia_addr *addr = (void*)&odata[-4];
1153 if (olen + 4U < sizeof(*addr))
1156 entry.preferred = ntohl(addr->preferred);
1157 entry.valid = ntohl(addr->valid);
1159 if (entry.preferred > entry.valid)
1162 entry.t1 = (t1 ? t1 : (entry.preferred != UINT32_MAX ? 0.5 * entry.preferred : UINT32_MAX));
1163 entry.t2 = (t2 ? t2 : (entry.preferred != UINT32_MAX ? 0.8 * entry.preferred : UINT32_MAX));
1164 if (entry.t1 > entry.t2)
1165 entry.t1 = entry.t2;
1168 entry.target = addr->addr;
1170 #ifdef EXT_PREFIX_CLASS
1171 uint16_t stype, slen;
1173 // Find prefix class, if any
1174 dhcpv6_for_each_option(&addr[1], odata + olen,
1176 if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
1177 entry.class = sdata[0] << 8 | sdata[1];
1180 odhcp6c_update_entry(STATE_IA_NA, &entry);
1188 static int dhcpv6_calc_refresh_timers(void)
1190 struct odhcp6c_entry *e;
1191 size_t ia_na_entries, ia_pd_entries, i;
1192 int64_t l_t1 = UINT32_MAX, l_t2 = UINT32_MAX, l_t3 = 0;
1194 e = odhcp6c_get_state(STATE_IA_NA, &ia_na_entries);
1195 ia_na_entries /= sizeof(*e);
1196 for (i = 0; i < ia_na_entries; i++) {
1203 if (e[i].valid > l_t3)
1207 e = odhcp6c_get_state(STATE_IA_PD, &ia_pd_entries);
1208 ia_pd_entries /= sizeof(*e);
1209 for (i = 0; i < ia_pd_entries; i++) {
1216 if (e[i].valid > l_t3)
1220 if (ia_pd_entries || ia_na_entries) {
1228 return (int)(ia_pd_entries + ia_na_entries);
1232 static void dhcpv6_log_status_code(const uint16_t code, const char *scope,
1233 const void *status_msg, const int len)
1235 uint8_t buf[len + 3];
1237 memset(buf, 0, sizeof(buf));
1240 memcpy(&buf[1], status_msg, len);
1244 syslog(LOG_WARNING, "Server returned %s status %i %s",
1249 static void dhcpv6_handle_status_code(const enum dhcpv6_msg orig,
1250 const uint16_t code, const void *status_msg, const int len,
1253 dhcpv6_log_status_code(code, "message", status_msg, len);
1256 case DHCPV6_UnspecFail:
1261 case DHCPV6_UseMulticast:
1262 // TODO handle multicast status code
1265 case DHCPV6_NoAddrsAvail:
1266 case DHCPV6_NoPrefixAvail:
1267 if (orig == DHCPV6_MSG_REQUEST)
1268 *ret = 0; // Failure
1277 static void dhcpv6_handle_ia_status_code(const enum dhcpv6_msg orig,
1278 const struct dhcpv6_ia_hdr *ia_hdr, const uint16_t code,
1279 const void *status_msg, const int len,
1280 bool handled_status_codes[_DHCPV6_Status_Max], int *ret)
1282 dhcpv6_log_status_code(code, ia_hdr->type == DHCPV6_OPT_IA_NA ?
1283 "IA_NA" : "IA_PD", status_msg, len);
1286 case DHCPV6_NoBinding:
1288 case DHCPV6_MSG_RENEW:
1289 case DHCPV6_MSG_REBIND:
1290 if ((*ret > 0) && !handled_status_codes[code])
1291 *ret = dhcpv6_request(DHCPV6_MSG_REQUEST);
1299 case DHCPV6_NoAddrsAvail:
1300 case DHCPV6_NoPrefixAvail:
1302 case DHCPV6_MSG_REQUEST:
1311 case DHCPV6_NotOnLink:
1312 // TODO handle not onlink in case of confirm
1320 static void dhcpv6_add_server_cand(const struct dhcpv6_server_cand *cand)
1323 struct dhcpv6_server_cand *c = odhcp6c_get_state(STATE_SERVER_CAND, &cand_len);
1325 // Remove identical duid server candidate
1326 for (i = 0; i < cand_len / sizeof(*c); ++i) {
1327 if (cand->duid_len == c[i].duid_len &&
1328 !memcmp(cand->duid, c[i].duid, cand->duid_len)) {
1331 odhcp6c_remove_state(STATE_SERVER_CAND, i * sizeof(*c), sizeof(*c));
1336 for (i = 0, c = odhcp6c_get_state(STATE_SERVER_CAND, &cand_len);
1337 i < cand_len / sizeof(*c); ++i) {
1338 if (c[i].preference < cand->preference)
1342 odhcp6c_insert_state(STATE_SERVER_CAND, i * sizeof(*c), cand, sizeof(*cand));
1345 static void dhcpv6_clear_all_server_cand(void)
1348 struct dhcpv6_server_cand *c = odhcp6c_get_state(STATE_SERVER_CAND, &cand_len);
1350 // Server candidates need deep delete for IA_NA/IA_PD
1351 for (i = 0; i < cand_len / sizeof(*c); ++i) {
1355 odhcp6c_clear_state(STATE_SERVER_CAND);
1358 int dhcpv6_promote_server_cand(void)
1361 struct dhcpv6_server_cand *cand = odhcp6c_get_state(STATE_SERVER_CAND, &cand_len);
1363 int ret = (na_mode == IA_MODE_NONE && pd_mode == IA_MODE_NONE) ?
1364 DHCPV6_STATELESS : DHCPV6_STATEFUL;
1366 // Clear lingering candidate state info
1367 odhcp6c_clear_state(STATE_SERVER_ID);
1368 odhcp6c_clear_state(STATE_IA_NA);
1369 odhcp6c_clear_state(STATE_IA_PD);
1374 if (cand->has_noaddravail && na_mode == IA_MODE_TRY) {
1375 na_mode = IA_MODE_NONE;
1377 dhcpv6_retx[DHCPV6_MSG_SOLICIT].max_timeo = cand->sol_max_rt;
1378 dhcpv6_retx[DHCPV6_MSG_INFO_REQ].max_timeo = cand->inf_max_rt;
1380 return dhcpv6_request(DHCPV6_MSG_SOLICIT);
1383 hdr[0] = htons(DHCPV6_OPT_SERVERID);
1384 hdr[1] = htons(cand->duid_len);
1385 odhcp6c_add_state(STATE_SERVER_ID, hdr, sizeof(hdr));
1386 odhcp6c_add_state(STATE_SERVER_ID, cand->duid, cand->duid_len);
1387 accept_reconfig = cand->wants_reconfigure;
1388 if (cand->ia_na_len) {
1389 odhcp6c_add_state(STATE_IA_NA, cand->ia_na, cand->ia_na_len);
1391 if (na_mode != IA_MODE_NONE)
1392 ret = DHCPV6_STATEFUL;
1394 if (cand->ia_pd_len) {
1395 odhcp6c_add_state(STATE_IA_PD, cand->ia_pd, cand->ia_pd_len);
1398 ret = DHCPV6_STATEFUL;
1401 dhcpv6_retx[DHCPV6_MSG_SOLICIT].max_timeo = cand->sol_max_rt;
1402 dhcpv6_retx[DHCPV6_MSG_INFO_REQ].max_timeo = cand->inf_max_rt;
1404 odhcp6c_remove_state(STATE_SERVER_CAND, 0, sizeof(*cand));