static bool dhcpv6_response_is_valid(const void *buf, ssize_t len,
const uint8_t transaction[3], enum dhcpv6_msg type);
-static uint32_t dhcpv6_parse_ia(void *opt, void *end);
+static int dhcpv6_parse_ia(void *opt, void *end);
+
+static int dhcpv6_calc_refresh_timers(void);
+static void dhcpv6_handle_status_code(_unused const enum dhcpv6_msg orig,
+ const uint16_t code, const void *status_msg, const int len,
+ int *ret);
+static void dhcpv6_handle_ia_status_code(const enum dhcpv6_msg orig,
+ const struct dhcpv6_ia_hdr *ia_hdr, const uint16_t code,
+ const void *status_msg, const int len,
+ bool handled_status_codes[_DHCPV6_Status_Max],
+ int *ret);
static reply_handler dhcpv6_handle_reply;
static reply_handler dhcpv6_handle_advert;
// RFC 3315 - 5.5 Timeout and Delay values
static struct dhcpv6_retx dhcpv6_retx[_DHCPV6_MSG_MAX] = {
- [DHCPV6_MSG_UNKNOWN] = {false, 1, 120, "<POLL>",
- dhcpv6_handle_reconfigure, NULL},
- [DHCPV6_MSG_SOLICIT] = {true, 1, 3600, "SOLICIT",
- dhcpv6_handle_advert, dhcpv6_commit_advert},
- [DHCPV6_MSG_REQUEST] = {true, 30, 10, "REQUEST",
- dhcpv6_handle_reply, NULL},
- [DHCPV6_MSG_RENEW] = {false, 10, 600, "RENEW",
- dhcpv6_handle_reply, NULL},
- [DHCPV6_MSG_REBIND] = {false, 10, 600, "REBIND",
- dhcpv6_handle_rebind_reply, NULL},
- [DHCPV6_MSG_RELEASE] = {false, 1, 600, "RELEASE", NULL, NULL},
- [DHCPV6_MSG_DECLINE] = {false, 1, 3, "DECLINE", NULL, NULL},
- [DHCPV6_MSG_INFO_REQ] = {true, 1, 120, "INFOREQ",
- dhcpv6_handle_reply, NULL},
+ [DHCPV6_MSG_UNKNOWN] = {false, 1, 120,
0, "<POLL>",
+ dhcpv6_handle_reconfigure, NULL},
+ [DHCPV6_MSG_SOLICIT] = {true, 1, 3600, 0, "SOLICIT",
+ dhcpv6_handle_advert, dhcpv6_commit_advert},
+ [DHCPV6_MSG_REQUEST] = {true, 1, 30, 10, "REQUEST",
+ dhcpv6_handle_reply, NULL},
+ [DHCPV6_MSG_RENEW] = {false, 10, 600, 0, "RENEW",
+ dhcpv6_handle_reply, NULL},
+ [DHCPV6_MSG_REBIND] = {false, 10, 600, 0, "REBIND",
+ dhcpv6_handle_rebind_reply, NULL},
+ [DHCPV6_MSG_RELEASE] = {false, 1, 0, 5, "RELEASE", NULL, NULL},
+ [DHCPV6_MSG_DECLINE] = {false, 1, 0, 5, "DECLINE", NULL, NULL},
+ [DHCPV6_MSG_INFO_REQ] = {true, 1, 120, 0, "INFOREQ",
+ dhcpv6_handle_reply, NULL},
};
// IA states
static int request_prefix = -1;
-static enum odhcp6c_ia_mode na_mode = IA_MODE_NONE;
+static enum odhcp6c_ia_mode na_mode = IA_MODE_NONE, pd_mode = IA_MODE_NONE;
static bool accept_reconfig = false;
// Reconfigure key
-int init_dhcpv6(const char *ifname, int request_pd)
+int init_dhcpv6(const char *ifname, int request_pd, int sol_timeout)
{
request_prefix = request_pd;
+ dhcpv6_retx[DHCPV6_MSG_SOLICIT].max_timeo = sol_timeout;
sock = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
htons(DHCPV6_OPT_SIP_SERVER_A),
htons(DHCPV6_OPT_AFTR_NAME),
htons(DHCPV6_OPT_PD_EXCLUDE),
+#ifdef EXT_PREFIX_CLASS
htons(DHCPV6_OPT_PREFIX_CLASS),
+#endif
};
odhcp6c_add_state(STATE_ORO, oro, sizeof(oro));
int val = 1;
setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val));
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
+ val = 0;
+ setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &val, sizeof(val));
setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname));
struct sockaddr_in6 client_addr = { .sin6_family = AF_INET6,
}
-void dhcpv6_set_ia_na_mode(enum odhcp6c_ia_mode mode)
+void dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na, enum odhcp6c_ia_mode pd)
{
- na_mode = mode;
+ na_mode = na;
+ pd_mode = pd;
}
.type = htons(DHCPV6_OPT_IA_PREFIX),
.len = htons(25), .prefix = request_prefix
};
- if (request_prefix > 0 && ia_pd_len == 0 &&
- (type == DHCPV6_MSG_SOLICIT ||
- type == DHCPV6_MSG_REQUEST)) {
+ if (request_prefix > 0 && ia_pd_len == 0 && type == DHCPV6_MSG_SOLICIT) {
ia_pd = (uint8_t*)&pref;
ia_pd_len = sizeof(pref);
}
}
// Disable IAs if not used
- if (type != DHCPV6_MSG_REQUEST && type != DHCPV6_MSG_SOLICIT) {
+ if (type != DHCPV6_MSG_SOLICIT) {
iov[5].iov_len = 0;
if (ia_na_len == 0)
iov[7].iov_len = 0;
int dhcpv6_request(enum dhcpv6_msg type)
{
- uint8_t buf[1536];
+ uint8_t buf[1536], rc = 0;
uint64_t timeout = UINT32_MAX;
struct dhcpv6_retx *retx = &dhcpv6_retx[type];
nanosleep(&ts, NULL);
}
- if (type == DHCPV6_MSG_RELEASE || type == DHCPV6_MSG_DECLINE)
- timeout = 3;
- else if (type == DHCPV6_MSG_UNKNOWN)
+ if (type == DHCPV6_MSG_UNKNOWN)
timeout = t1;
else if (type == DHCPV6_MSG_RENEW)
timeout = (t2 > t1) ? t2 - t1 : 0;
if (timeout == 0)
return -1;
- syslog(LOG_NOTICE, "Sending %s (timeout %us)", retx->name, (unsigned)timeout);
+ syslog(LOG_NOTICE, "Starting %s transaction (timeout %llus, max rc %d)",
+ retx->name, (unsigned long long)timeout, retx->max_rc);
uint64_t start = odhcp6c_get_milli_time(), round_start = start, elapsed;
int64_t rto = 0;
do {
- rto = (rto == 0) ? (retx->init_timeo * 1000 +
- dhcpv6_rand_delay(retx->init_timeo * 1000)) :
- (2 * rto + dhcpv6_rand_delay(rto));
+ if (rto == 0) {
+ int64_t delay = dhcpv6_rand_delay(retx->init_timeo * 1000);
- if (rto >= retx->max_timeo * 1000)
+ // First RT MUST be strictly greater than IRT for solicit messages (RFC3313 17.1.2)
+ while (type == DHCPV6_MSG_SOLICIT && delay <= 0)
+ delay = dhcpv6_rand_delay(retx->init_timeo * 1000);
+
+ rto = (retx->init_timeo * 1000 + delay);
+ }
+ else
+ rto = (2 * rto + dhcpv6_rand_delay(rto));
+
+ if (retx->max_timeo && (rto >= retx->max_timeo * 1000))
rto = retx->max_timeo * 1000 +
dhcpv6_rand_delay(retx->max_timeo * 1000);
round_end = timeout * 1000 + start;
// Built and send package
- if (type != DHCPV6_MSG_UNKNOWN)
+ if (type != DHCPV6_MSG_UNKNOWN) {
+ if (type != DHCPV6_MSG_SOLICIT)
+ syslog(LOG_NOTICE, "Send %s message (elapsed %llums, rc %d)",
+ retx->name, (unsigned long long)elapsed, rc);
dhcpv6_send(type, trid, elapsed / 10);
+ rc++;
+ }
// Receive rounds
for (; len < 0 && round_start < round_end;
round_start = odhcp6c_get_milli_time();
elapsed = round_start - start;
syslog(LOG_NOTICE, "Got a valid reply after "
- "%ums", (unsigned)elapsed);
+ "%llums", (unsigned long long)elapsed);
if (retx->handler_reply)
len = retx->handler_reply(
- type, opt, opt_end);
+ type, rc, opt, opt_end);
- if (round_end - round_start > 1000)
+ if (len > 0 && round_end - round_start > 1000)
round_end = 1000 + round_start;
}
}
// Allow
if (retx->handler_finish)
len = retx->handler_finish();
- } while (len < 0 && elapsed / 1000 < timeout);
+ } while (len < 0 && ((elapsed / 1000 < timeout) && (!retx->max_rc || rc < retx->max_rc)));
return len;
}
}
-static int dhcpv6_handle_reconfigure(_unused enum dhcpv6_msg orig,
+static int dhcpv6_handle_reconfigure(_unused enum dhcpv6_msg orig, const int rc,
const void *opt, const void *end)
{
// TODO: should verify the reconfigure message
odata[0] == DHCPV6_MSG_INFO_REQ))
msg = odata[0];
- dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, NULL, NULL);
+ dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, rc, NULL, NULL);
return msg;
}
// Collect all advertised servers
-static int dhcpv6_handle_advert(enum dhcpv6_msg orig,
+static int dhcpv6_handle_advert(enum dhcpv6_msg orig, const int rc,
const void *opt, const void *end)
{
uint16_t olen, otype;
- uint8_t *odata;
+ uint8_t *odata, pref = 0;
struct dhcpv6_server_cand cand = {false, false, 0, 0, {0}, NULL, NULL, 0, 0};
+ bool have_na = false;
+ int have_pd = 0;
dhcpv6_for_each_option(opt, end, otype, olen, odata) {
if (orig == DHCPV6_MSG_SOLICIT &&
(otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA) &&
olen > sizeof(struct dhcpv6_ia_hdr)) {
struct dhcpv6_ia_hdr *ia_hdr = (void*)(&odata[-4]);
- dhcpv6_parse_ia(&ia_hdr[1], odata + olen);
+ dhcpv6_parse_ia(ia_hdr, odata + olen + sizeof(*ia_hdr));
}
if (otype == DHCPV6_OPT_SERVERID && olen <= 130) {
memcpy(cand.duid, odata, olen);
cand.duid_len = olen;
- } else if (otype == DHCPV6_OPT_STATUS && olen >= 2 && !odata[0]
- && odata[1] == DHCPV6_NoAddrsAvail) {
- if (na_mode == IA_MODE_FORCE) {
- return -1;
- } else {
- cand.has_noaddravail = true;
- cand.preference -= 1000;
+ } else if (otype == DHCPV6_OPT_STATUS && olen >= 2) {
+ int error = ((int)odata[0] << 8 | (int)odata[1]);
+
+ switch (error) {
+ case DHCPV6_NoPrefixAvail:
+ // Status code on global level
+ if (pd_mode == IA_MODE_FORCE)
+ return -1;
+ cand.preference -= 2000;
+ break;
+
+ case DHCPV6_NoAddrsAvail:
+ // Status code on global level
+ if (na_mode == IA_MODE_FORCE)
+ return -1;
+ break;
+
+ default :
+ break;
}
- } else if (otype == DHCPV6_OPT_STATUS && olen >= 2 && !odata[0]
- && odata[1] == DHCPV6_NoPrefixAvail) {
- cand.preference -= 2000;
} else if (otype == DHCPV6_OPT_PREF && olen >= 1 &&
cand.preference >= 0) {
- cand.preference = odata[0];
+ cand.preference = pref = odata[0];
} else if (otype == DHCPV6_OPT_RECONF_ACCEPT) {
cand.wants_reconfigure = true;
} else if (otype == DHCPV6_OPT_IA_PD && request_prefix) {
struct dhcpv6_ia_hdr *h = (struct dhcpv6_ia_hdr*)&odata[-4];
uint8_t *oend = odata + olen, *d;
dhcpv6_for_each_option(&h[1], oend, otype, olen, d) {
- if (otype == DHCPV6_OPT_IA_PREFIX)
- cand.preference += 2000;
- else if (otype == DHCPV6_OPT_STATUS &&
- olen >= 2 && d[0] == 0 &&
- d[1] == DHCPV6_NoPrefixAvail)
- cand.preference -= 2000;
+ if (otype == DHCPV6_OPT_IA_PREFIX && (olen + 4) >=
+ (uint16_t)sizeof(struct dhcpv6_ia_prefix)) {
+ struct dhcpv6_ia_prefix *p = (struct dhcpv6_ia_prefix*)&d[-4];
+ have_pd = p->prefix;
+ }
}
+ } else if (otype == DHCPV6_OPT_IA_NA) {
+ struct dhcpv6_ia_hdr *h = (struct dhcpv6_ia_hdr*)&odata[-4];
+ uint8_t *oend = odata + olen, *d;
+ dhcpv6_for_each_option(&h[1], oend, otype, olen, d)
+ if (otype == DHCPV6_OPT_IA_ADDR)
+ have_na = true;
}
}
+ if ((!have_na && na_mode == IA_MODE_FORCE) ||
+ (!have_pd && pd_mode == IA_MODE_FORCE))
+ return -1;
+
+ if (na_mode != IA_MODE_NONE && !have_na) {
+ cand.has_noaddravail = true;
+ cand.preference -= 1000;
+ }
+
+ if (pd_mode != IA_MODE_NONE) {
+ if (have_pd)
+ cand.preference += 2000 + (128 - have_pd);
+ else
+ cand.preference -= 2000;
+ }
+
if (cand.duid_len > 0) {
cand.ia_na = odhcp6c_move_state(STATE_IA_NA, &cand.ia_na_len);
cand.ia_pd = odhcp6c_move_state(STATE_IA_PD, &cand.ia_pd_len);
odhcp6c_clear_state(STATE_IA_PD);
}
- return -1;
+ return (rc > 1 || (pref == 255 && cand.preference > 0)) ? 1 : -1;
}
odhcp6c_add_state(STATE_SERVER_ID, hdr, sizeof(hdr));
odhcp6c_add_state(STATE_SERVER_ID, c->duid, c->duid_len);
accept_reconfig = c->wants_reconfigure;
- odhcp6c_add_state(STATE_IA_NA, c->ia_na, c->ia_na_len);
- odhcp6c_add_state(STATE_IA_PD, c->ia_pd, c->ia_pd_len);
+ if (c->ia_na_len)
+ odhcp6c_add_state(STATE_IA_NA, c->ia_na, c->ia_na_len);
+ if (c->ia_pd_len)
+ odhcp6c_add_state(STATE_IA_PD, c->ia_pd, c->ia_pd_len);
}
for (size_t i = 0; i < cand_len / sizeof(*c); ++i) {
if (!c)
return -1;
- else if (request_prefix || na_mode != IA_MODE_NONE)
+ else if ((request_prefix && c->ia_pd_len) || (na_mode != IA_MODE_NONE && c->ia_na_len))
return DHCPV6_STATEFUL;
else
return DHCPV6_STATELESS;
}
-static int dhcpv6_handle_rebind_reply(enum dhcpv6_msg orig,
+static int dhcpv6_handle_rebind_reply(enum dhcpv6_msg orig, const int rc,
const void *opt, const void *end)
{
- dhcpv6_handle_advert(orig, opt, end);
+ dhcpv6_handle_advert(orig, rc, opt, end);
if (dhcpv6_commit_advert() < 0) {
- dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, NULL, NULL);
+ dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, rc, NULL, NULL);
return -1;
}
- return dhcpv6_handle_reply(orig, opt, end);
+ return dhcpv6_handle_reply(orig, rc, opt, end);
}
-static int dhcpv6_handle_reply(enum dhcpv6_msg orig,
+static int dhcpv6_handle_reply(enum dhcpv6_msg orig, _unused const int rc,
const void *opt, const void *end)
{
uint8_t *odata;
uint16_t otype, olen;
+ uint32_t refresh = UINT32_MAX;
+ int ret = 1;
+ bool handled_status_codes[_DHCPV6_Status_Max] = { false, };
odhcp6c_expire();
if (t3 < 0)
t3 = 0;
- } else {
- t1 = t2 = t3 = UINT32_MAX;
}
- if (orig == DHCPV6_MSG_REQUEST) {
+ if (orig == DHCPV6_MSG_REQUEST && !odhcp6c_is_bound()) {
// Delete NA and PD we have in the state from the Advert
odhcp6c_clear_state(STATE_IA_NA);
odhcp6c_clear_state(STATE_IA_PD);
if ((otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA)
&& olen > sizeof(struct dhcpv6_ia_hdr)) {
struct dhcpv6_ia_hdr *ia_hdr = (void*)(&odata[-4]);
- uint32_t l_t1 = ntohl(ia_hdr->t1);
- uint32_t l_t2 = ntohl(ia_hdr->t2);
- // Test ID and T1-T2 validity
- if (ia_hdr->iaid != 1 || l_t2 < l_t1)
+ // Test ID
+ if (ia_hdr->iaid != 1)
continue;
- bool error = false;
+ uint16_t code = DHCPV6_Success;
uint16_t stype, slen;
uint8_t *sdata;
- // Test status and bail if error
+ // Get and handle status code
dhcpv6_for_each_option(&ia_hdr[1], odata + olen,
- stype, slen, sdata)
- if (stype == DHCPV6_OPT_STATUS && slen >= 2 &&
- (sdata[0] || sdata[1]))
- error = true;
+ stype, slen, sdata) {
+ if (stype == DHCPV6_OPT_STATUS && slen >= 2) {
+ uint8_t *mdata = (slen > 2) ? &sdata[2] : NULL;
+ uint16_t mlen = (slen > 2) ? slen - 2 : 0;
- if (error)
- continue;
+ code = ((int)sdata[0]) << 8 | ((int)sdata[1]);
- uint32_t n = dhcpv6_parse_ia(&ia_hdr[1], odata + olen);
+ if (code == DHCPV6_Success)
+ continue;
- if (!l_t1)
- l_t1 = 300;
+ dhcpv6_handle_ia_status_code(orig, ia_hdr,
+ code, mdata, mlen, handled_status_codes, &ret);
- if (!l_t2)
- l_t2 = 600;
- if (n < t3)
- t3 = n;
+ if (ret > 0)
+ return ret;
+ break;
+ }
+ }
- // Update times
- if (l_t1 > 0 && t1 > l_t1)
- t1 = l_t1;
+ if (code != DHCPV6_Success)
+ continue;
- if (l_t2 > 0 && t2 > l_t2)
- t2 = l_t2;
+ dhcpv6_parse_ia(ia_hdr, odata + olen + sizeof(*ia_hdr));
+ } else if (otype == DHCPV6_OPT_STATUS && olen >= 2) {
+ uint8_t *mdata = (olen > 2) ? &odata[2] : NULL;
+ uint16_t mlen = (olen > 2) ? olen - 2 : 0;
+ uint16_t code = ((int)odata[0]) << 8 | ((int)odata[1]);
- } else if (otype == DHCPV6_OPT_DNS_SERVERS) {
+ dhcpv6_handle_status_code(orig, code, mdata, mlen, &ret);
+ }
+ else if (otype == DHCPV6_OPT_DNS_SERVERS) {
if (olen % 16 == 0)
odhcp6c_add_state(STATE_DNS, odata, olen);
} else if (otype == DHCPV6_OPT_DNS_DOMAIN) {
} else if (otype == DHCPV6_OPT_SIP_SERVER_D) {
odhcp6c_add_state(STATE_SIP_FQDN, odata, olen);
} else if (otype == DHCPV6_OPT_INFO_REFRESH && olen >= 4) {
- uint32_t refresh = ntohl(*((uint32_t*)odata));
- if (refresh < (uint32_t)t1)
- t1 = refresh;
+ refresh = ntohl(*((uint32_t*)odata));
} else if (otype == DHCPV6_OPT_AUTH && olen == -4 +
sizeof(struct dhcpv6_auth_reconfigure)) {
struct dhcpv6_auth_reconfigure *r = (void*)&odata[-4];
}
}
- return true;
+ if (orig != DHCPV6_MSG_INFO_REQ) {
+ // Update refresh timers if no fatal status code was received
+ if ((ret > 0) && dhcpv6_calc_refresh_timers()) {
+ switch (orig) {
+ case DHCPV6_MSG_RENEW:
+ // Send further renews if T1 is not set
+ if (!t1)
+ ret = -1;
+ break;
+ case DHCPV6_MSG_REBIND:
+ // Send further rebinds if T1 and T2 is not set
+ if (!t1 && !t2)
+ ret = -1;
+ break;
+
+ default :
+ break;
+ }
+ }
+ }
+ else if (ret > 0)
+ t1 = refresh;
+
+ return ret;
}
-static uint32_t dhcpv6_parse_ia(void *opt, void *end)
+static int dhcpv6_parse_ia(void *opt, void *end)
{
- uint32_t timeout = UINT32_MAX; // Minimum timeout
+ struct dhcpv6_ia_hdr *ia_hdr = (struct dhcpv6_ia_hdr *)opt;
+ int parsed_ia = 0;
+ uint32_t t1, t2;
uint16_t otype, olen;
uint8_t *odata;
+ t1 = ntohl(ia_hdr->t1);
+ t2 = ntohl(ia_hdr->t2);
+
+ if (t1 > t2)
+ return 0;
+
// Update address IA
- dhcpv6_for_each_option(opt, end, otype, olen, odata) {
- struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT,
- 0, 0, IN6ADDR_ANY_INIT, 0, 0, 0};
+ dhcpv6_for_each_option(&ia_hdr[1], end, otype, olen, odata) {
+ struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT, 0, 0,
+ IN6ADDR_ANY_INIT, 0, 0, 0, 0, 0};
if (otype == DHCPV6_OPT_IA_PREFIX) {
struct dhcpv6_ia_prefix *prefix = (void*)&odata[-4];
if (entry.preferred > entry.valid)
continue;
+ entry.t1 = (t1 ? t1 : (entry.preferred != UINT32_MAX ? 0.5 * entry.preferred : UINT32_MAX));
+ entry.t2 = (t2 ? t2 : (entry.preferred != UINT32_MAX ? 0.8 * entry.preferred : UINT32_MAX));
+ if (entry.t1 > entry.t2)
+ entry.t1 = entry.t2;
+
entry.length = prefix->prefix;
entry.target = prefix->addr;
uint16_t stype, slen;
uint8_t *sdata;
+#ifdef EXT_PREFIX_CLASS
// Find prefix class, if any
dhcpv6_for_each_option(&prefix[1], odata + olen,
- stype, slen, sdata)
- if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
- entry.prefix_class = ntohs(*((uint16_t*)sdata));
+ stype, slen, sdata)
+ if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
+ entry.class = sdata[0] << 8 | sdata[1];
+#endif
// Parse PD-exclude
bool ok = true;
entry.priority = elen;
}
- if (ok)
+ if (ok) {
odhcp6c_update_entry(STATE_IA_PD, &entry);
+ parsed_ia++;
+ }
entry.priority = 0;
memset(&entry.router, 0, sizeof(entry.router));
if (entry.preferred > entry.valid)
continue;
+ entry.t1 = (t1 ? t1 : (entry.preferred != UINT32_MAX ? 0.5 * entry.preferred : UINT32_MAX));
+ entry.t2 = (t2 ? t2 : (entry.preferred != UINT32_MAX ? 0.8 * entry.preferred : UINT32_MAX));
+ if (entry.t1 > entry.t2)
+ entry.t1 = entry.t2;
+
entry.length = 128;
entry.target = addr->addr;
+#ifdef EXT_PREFIX_CLASS
uint16_t stype, slen;
uint8_t *sdata;
-
// Find prefix class, if any
dhcpv6_for_each_option(&addr[1], odata + olen,
- stype, slen, sdata)
- if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
- entry.prefix_class = ntohs(*((uint16_t*)sdata));
-
+ stype, slen, sdata)
+ if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
+ entry.class = sdata[0] << 8 | sdata[1];
+#endif
+
odhcp6c_update_entry(STATE_IA_NA, &entry);
+ parsed_ia++;
}
+ }
+ return parsed_ia;
+}
+
+
+static int dhcpv6_calc_refresh_timers(void)
+{
+ struct odhcp6c_entry *e;
+ size_t ia_na_entries, ia_pd_entries, i;
+ int64_t l_t1 = UINT32_MAX, l_t2 = UINT32_MAX, l_t3 = 0;
+
+ e = odhcp6c_get_state(STATE_IA_NA, &ia_na_entries);
+ ia_na_entries /= sizeof(*e);
+ for (i = 0; i < ia_na_entries; i++) {
+ if (e[i].t1 < l_t1)
+ l_t1 = e[i].t1;
+
+ if (e[i].t2 < l_t2)
+ l_t2 = e[i].t2;
+
+ if (e[i].valid > l_t3)
+ l_t3 = e[i].valid;
+ }
+
+ e = odhcp6c_get_state(STATE_IA_PD, &ia_pd_entries);
+ ia_pd_entries /= sizeof(*e);
+ for (i = 0; i < ia_pd_entries; i++) {
+ if (e[i].t1 < l_t1)
+ l_t1 = e[i].t1;
+
+ if (e[i].t2 < l_t2)
+ l_t2 = e[i].t2;
+
+ if (e[i].valid > l_t3)
+ l_t3 = e[i].valid;
+ }
+
+ if (ia_pd_entries || ia_na_entries) {
+ t1 = l_t1;
+ t2 = l_t2;
+ t3 = l_t3;
+ }
- if (entry.valid > 0 && timeout > entry.valid)
- timeout = entry.valid;
+ return (int)(ia_pd_entries + ia_na_entries);
+}
+
+
+static void dhcpv6_log_status_code(const uint16_t code, const char *scope,
+ const void *status_msg, const int len)
+{
+ uint8_t buf[len + 3];
+
+ memset(buf, 0, sizeof(buf));
+ if (len) {
+ buf[0] = '(';
+ memcpy(&buf[1], status_msg, len);
+ buf[len + 1] = ')';
}
- return timeout;
+ syslog(LOG_WARNING, "Server returned %s status %i %s",
+ scope, code, buf);
+}
+
+
+static void dhcpv6_handle_status_code(const enum dhcpv6_msg orig,
+ const uint16_t code, const void *status_msg, const int len,
+ int *ret)
+{
+ dhcpv6_log_status_code(code, "message", status_msg, len);
+
+ switch (code) {
+ case DHCPV6_UnspecFail:
+ // Generic failure
+ *ret = 0;
+ break;
+
+ case DHCPV6_UseMulticast:
+ // TODO handle multicast status code
+ break;
+
+ case DHCPV6_NoAddrsAvail:
+ case DHCPV6_NoPrefixAvail:
+ if (orig == DHCPV6_MSG_REQUEST)
+ *ret = 0; // Failure
+ break;
+
+ default:
+ break;
+ }
+}
+
+
+static void dhcpv6_handle_ia_status_code(const enum dhcpv6_msg orig,
+ const struct dhcpv6_ia_hdr *ia_hdr, const uint16_t code,
+ const void *status_msg, const int len,
+ bool handled_status_codes[_DHCPV6_Status_Max], int *ret)
+{
+ dhcpv6_log_status_code(code, ia_hdr->type == DHCPV6_OPT_IA_NA ?
+ "IA_NA" : "IA_PD", status_msg, len);
+
+ switch (code) {
+ case DHCPV6_NoBinding:
+ switch (orig) {
+ case DHCPV6_MSG_RENEW:
+ case DHCPV6_MSG_REBIND:
+ if ((*ret > 0) && !handled_status_codes[code])
+ *ret = dhcpv6_request(DHCPV6_MSG_REQUEST);
+ break;
+
+ default:
+ break;
+ }
+ break;
+
+ case DHCPV6_NoAddrsAvail:
+ case DHCPV6_NoPrefixAvail:
+ switch (orig) {
+ case DHCPV6_MSG_REQUEST:
+ if (*ret != 0)
+ *ret = 0;
+ break;
+ default:
+ break;
+ }
+ break;
+
+ case DHCPV6_NotOnLink:
+ // TODO handle not onlink in case of confirm
+ break;
+
+ default:
+ break;
+ }
}
projects / odhcp6c.git / blobdiff