/**
* Copyright (C) 2013 Steven Barth <steven@midlink.org>
+ * Copyright (C) 2016 Hans Dedecker <dedeckeh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
+#include <poll.h>
#include <alloca.h>
#include <resolv.h>
#include <limits.h>
#include <arpa/inet.h>
#include <sys/timerfd.h>
+#define ADDR_ENTRY_VALID_IA_ADDR(iface, i, m, addrs) \
+ ((iface)->managed == RELAYD_MANAGED_NO_AFLAG || (i) == (m) || \
+ (addrs)[(i)].prefix > 64)
-static void update(struct interface *iface);
+static void free_dhcpv6_assignment(struct dhcpv6_assignment *c);
static void reconf_timer(struct uloop_timeout *event);
static struct uloop_timeout reconf_event = {.cb = reconf_timer};
static uint32_t serial = 0;
static uint8_t statemd5[16];
-
int dhcpv6_ia_init(void)
{
uloop_timeout_set(&reconf_event, 2000);
return 0;
}
-
-void free_dhcpv6_assignment(struct dhcpv6_assignment *c)
-{
- if (c->managed_sock.fd.registered) {
- ustream_free(&c->managed_sock.stream);
- close(c->managed_sock.fd.fd);
- }
-
- if (c->head.next)
- list_del(&c->head);
-
- free(c->managed);
- free(c->hostname);
- free(c->classes);
- free(c);
-}
-
-
int setup_dhcpv6_ia_interface(struct interface *iface, bool enable)
{
if (!enable && iface->ia_assignments.next) {
struct dhcpv6_assignment *c;
+
while (!list_empty(&iface->ia_assignments)) {
c = list_first_entry(&iface->ia_assignments, struct dhcpv6_assignment, head);
free_dhcpv6_assignment(c);
}
}
- if (iface->dhcpv6 == RELAYD_SERVER) {
+ if (enable && iface->dhcpv6 == RELAYD_SERVER) {
if (!iface->ia_assignments.next)
INIT_LIST_HEAD(&iface->ia_assignments);
syslog(LOG_ERR, "Calloc failed for border on interface %s", iface->ifname);
return -1;
}
-
+
border->length = 64;
list_add(&border->head, &iface->ia_assignments);
}
- update(iface);
-
- // Parse static entries
+ /* Parse static entries */
struct lease *lease;
list_for_each_entry(lease, &leases, head) {
- // Construct entry
- struct dhcpv6_assignment *a = calloc(1, sizeof(*a) + lease->duid_len);
+ /* Construct entry */
+ size_t duid_len = lease->duid_len ? lease->duid_len : 14;
+ struct dhcpv6_assignment *a = calloc(1, sizeof(*a) + duid_len);
if (!a) {
syslog(LOG_ERR, "Calloc failed for static lease assignment on interface %s",
iface->ifname);
return -1;
}
- a->clid_len = lease->duid_len;
+ if (lease->dhcpv4_leasetime > 0)
+ a->leasetime = lease->dhcpv4_leasetime;
+
+ a->clid_len = duid_len;
a->length = 128;
if (lease->hostid) {
a->assigned = lease->hostid;
uint32_t i4a = ntohl(lease->ipaddr.s_addr) & 0xff;
a->assigned = ((i4a / 100) << 8) | (((i4a % 100) / 10) << 4) | (i4a % 10);
}
+
odhcpd_urandom(a->key, sizeof(a->key));
- memcpy(a->clid_data, lease->duid, a->clid_len);
+ memcpy(a->clid_data, lease->duid, lease->duid_len);
memcpy(a->mac, lease->mac.ether_addr_octet, sizeof(a->mac));
+ /* Static assignment */
+ a->flags |= OAF_STATIC;
+ /* Infinite valid */
+ a->valid_until = 0;
- // Assign to all interfaces
+ /* Assign to all interfaces */
struct dhcpv6_assignment *c;
list_for_each_entry(c, &iface->ia_assignments, head) {
if (c->length != 128 || c->assigned > a->assigned) {
list_add_tail(&a->head, &c->head);
break;
- } else if (c->assigned == a->assigned) {
- // Already an assignment with that number
+ } else if (c->assigned == a->assigned)
+ /* Already an assignment with that number */
break;
- }
}
if (a->head.next) {
free(a->hostname);
a->hostname = strdup(lease->hostname);
}
- } else {
- free(a->classes);
- free(a->hostname);
- free(a);
- }
+ } else
+ free_dhcpv6_assignment(a);
}
}
return 0;
}
+static void free_dhcpv6_assignment(struct dhcpv6_assignment *c)
+{
+ if (c->managed_sock.fd.registered) {
+ ustream_free(&c->managed_sock.stream);
+ close(c->managed_sock.fd.fd);
+ }
+
+ if (c->head.next)
+ list_del(&c->head);
+
+ free(c->managed);
+ free(c->hostname);
+ free(c);
+}
+
+static inline bool valid_prefix_length(const struct dhcpv6_assignment *a, const uint8_t prefix_length)
+{
+ return (a->managed_size || a->length > prefix_length);
+}
+
+static inline bool valid_addr(const struct odhcpd_ipaddr *addr, time_t now)
+{
+ return (addr->prefix <= 96 && addr->preferred > (uint32_t)now);
+}
+
+static size_t elect_addr(const struct odhcpd_ipaddr *addrs, const size_t addrlen)
+{
+ size_t i, m;
+
+ for (i = 0, m = 0; i < addrlen; ++i) {
+ if (addrs[i].preferred > addrs[m].preferred ||
+ (addrs[i].preferred == addrs[m].preferred &&
+ memcmp(&addrs[i].addr, &addrs[m].addr, 16) > 0))
+ m = i;
+ }
+
+ return m;
+}
static int send_reconf(struct interface *iface, struct dhcpv6_assignment *assign)
{
return odhcpd_send(iface->dhcpv6_event.uloop.fd, &assign->peer, &iov, 1, iface);
}
-
void dhcpv6_write_statefile(void)
{
md5_ctx_t md5;
return;
lockf(fd, F_LOCK, 0);
- ftruncate(fd, 0);
+ if (ftruncate(fd, 0) < 0) {}
FILE *fp = fdopen(fd, "w");
if (!fp) {
if (iface->dhcpv6 == RELAYD_SERVER && iface->ia_assignments.next) {
struct dhcpv6_assignment *c;
list_for_each_entry(c, &iface->ia_assignments, head) {
- if (c->clid_len == 0 || c->managed_size < 0)
+ if (!(c->flags & OAF_BOUND) || c->managed_size < 0)
continue;
char ipbuf[INET6_ADDRSTRLEN];
char duidbuf[264];
odhcpd_hexlify(duidbuf, c->clid_data, c->clid_len);
- // iface DUID iaid hostname lifetime assigned length [addrs...]
- int l = snprintf(leasebuf, sizeof(leasebuf), "# %s %s %x %s %u %x %u ",
+ /* iface DUID iaid hostname lifetime assigned length [addrs...] */
+ int l = snprintf(leasebuf, sizeof(leasebuf), "# %s %s %x %s %ld %x %u ",
iface->ifname, duidbuf, ntohl(c->iaid),
(c->hostname ? c->hostname : "-"),
- (unsigned)(c->valid_until > now ?
- (c->valid_until - now + wall_time) : 0),
+ (c->valid_until > now ?
+ (c->valid_until - now + wall_time) :
+ (INFINITE_VALID(c->valid_until) ? -1 : 0)),
c->assigned, (unsigned)c->length);
struct in6_addr addr;
struct odhcpd_ipaddr *addrs = (c->managed) ? c->managed : iface->ia_addr;
size_t addrlen = (c->managed) ? (size_t)c->managed_size : iface->ia_addr_len;
+ size_t m = elect_addr(addrs, addrlen);
for (size_t i = 0; i < addrlen; ++i) {
- if (addrs[i].prefix > 96)
+ if (!valid_addr(&addrs[i], now) ||
+ (!INFINITE_VALID(c->valid_until) && c->valid_until <= now))
continue;
addr = addrs[i].addr;
- if (c->length == 128)
+ if (c->length == 128) {
+ if (!ADDR_ENTRY_VALID_IA_ADDR(iface, i, m, addrs))
+ continue;
+
addr.s6_addr32[3] = htonl(c->assigned);
- else
+ }
+ else {
+ if (!valid_prefix_length(c, addrs[i].prefix))
+ continue;
+
addr.s6_addr32[1] |= htonl(c->assigned);
+ }
inet_ntop(AF_INET6, &addr, ipbuf, sizeof(ipbuf) - 1);
- if (c->length == 128 && c->hostname && i == 0) {
+ if (c->length == 128 && c->hostname) {
fputs(ipbuf, fp);
char b[256];
- if (dn_expand(iface->search, iface->search + iface->search_len,
- iface->search, b, sizeof(b)) > 0)
- fprintf(fp, "\t%s.%s", c->hostname, b);
+ if (dn_expand(iface->search, iface->search + iface->search_len,
+ iface->search, b, sizeof(b)) > 0)
+ fprintf(fp, "\t%s.%s", c->hostname, b);
fprintf(fp, "\t%s\n", c->hostname);
md5_hash(ipbuf, strlen(ipbuf), &md5);
md5_hash(c->hostname, strlen(c->hostname), &md5);
}
- l += snprintf(leasebuf + l, sizeof(leasebuf) - l, "%s/%hhu ", ipbuf,
+ l += snprintf(leasebuf + l, sizeof(leasebuf) - l, "%s/%d ", ipbuf,
(c->managed_size) ? addrs[i].prefix : c->length);
}
leasebuf[l - 1] = '\n';
if (iface->dhcpv4 == RELAYD_SERVER && iface->dhcpv4_assignments.next) {
struct dhcpv4_assignment *c;
list_for_each_entry(c, &iface->dhcpv4_assignments, head) {
+ if (!(c->flags & OAF_BOUND))
+ continue;
+
char ipbuf[INET6_ADDRSTRLEN];
char leasebuf[512];
char duidbuf[16];
odhcpd_hexlify(duidbuf, c->hwaddr, sizeof(c->hwaddr));
- // iface DUID iaid hostname lifetime assigned length [addrs...]
- int l = snprintf(leasebuf, sizeof(leasebuf), "# %s %s ipv4 %s %u %x 32 ",
+ /* iface DUID iaid hostname lifetime assigned length [addrs...] */
+ int l = snprintf(leasebuf, sizeof(leasebuf), "# %s %s ipv4 %s %ld %x 32 ",
iface->ifname, duidbuf,
(c->hostname ? c->hostname : "-"),
- (unsigned)(c->valid_until > now ?
- (c->valid_until - now + wall_time) : 0),
+ (c->valid_until > now ?
+ (c->valid_until - now + wall_time) :
+ (INFINITE_VALID(c->valid_until) ? -1 : 0)),
c->addr);
struct in_addr addr = {htonl(c->addr)};
inet_ntop(AF_INET, &addr, ipbuf, sizeof(ipbuf) - 1);
- if (c->hostname[0]) {
+ if (c->hostname) {
fputs(ipbuf, fp);
char b[256];
- if (dn_expand(iface->search, iface->search + iface->search_len,
- iface->search, b, sizeof(b)) > 0)
- fprintf(fp, "\t%s.%s", c->hostname, b);
+ if (dn_expand(iface->search, iface->search + iface->search_len,
+ iface->search, b, sizeof(b)) > 0)
+ fprintf(fp, "\t%s.%s", c->hostname, b);
fprintf(fp, "\t%s\n", c->hostname);
md5_hash(ipbuf, strlen(ipbuf), &md5);
struct in6_addr prefix = addrs[i].addr;
prefix.s6_addr32[1] |= htonl(a->assigned);
odhcpd_setup_route(&prefix, (a->managed_size) ? addrs[i].prefix : a->length,
- iface, &a->peer.sin6_addr, add);
+ iface, &a->peer.sin6_addr, 1024, add);
}
}
-
-// More data was received from TCP connection
+/* More data was received from TCP connection */
static void managed_handle_pd_data(struct ustream *s, _unused int bytes_new)
{
struct dhcpv6_assignment *c = container_of(s, struct dhcpv6_assignment, managed_sock);
else
n->valid += now;
- n->has_class = false;
- n->class = 0;
n->dprefix = 0;
++c->managed_size;
if (first && c->managed_size == 0)
free_dhcpv6_assignment(c);
+ else if (first && !(c->flags & OAF_STATIC))
+ c->valid_until = now + 150;
}
-// TCP transmission has ended, either because of success or timeout or other error
+/* TCP transmission has ended, either because of success or timeout or other error */
static void managed_handle_pd_done(struct ustream *s)
{
struct dhcpv6_assignment *c = container_of(s, struct dhcpv6_assignment, managed_sock);
- c->valid_until = odhcpd_time() + 15;
+
+ if (!(c->flags & OAF_STATIC))
+ c->valid_until = odhcpd_time() + 15;
+
c->managed_size = 0;
+
if (c->accept_reconf)
c->reconf_cnt = 1;
}
-
-
static bool assign_pd(struct interface *iface, struct dhcpv6_assignment *assign)
{
struct dhcpv6_assignment *c;
iaidbuf, assign->iaid, assign->length);
ustream_write_pending(&assign->managed_sock.stream);
assign->managed_size = -1;
+
+ if (!(assign->flags & OAF_STATIC))
+ assign->valid_until = odhcpd_time() + 15;
+
list_add(&assign->head, &iface->ia_assignments);
+
+ /* Wait initial period of up to 250ms for immediate assignment */
+ struct pollfd pfd = { .fd = fd, .events = POLLIN };
+ poll(&pfd, 1, 250);
+ managed_handle_pd_data(&assign->managed_sock.stream, 0);
+
+ if (fcntl(fd, F_GETFL) >= 0 && assign->managed_size > 0)
+ return true;
}
return false;
- } else if (iface->ia_addr_len < 1) {
+ } else if (iface->ia_addr_len < 1)
return false;
- }
- // Try honoring the hint first
+ /* Try honoring the hint first */
uint32_t current = 1, asize = (1 << (64 - assign->length)) - 1;
if (assign->assigned) {
list_for_each_entry(c, &iface->ia_assignments, head) {
}
}
- // Fallback to a variable assignment
+ /* Fallback to a variable assignment */
current = 1;
list_for_each_entry(c, &iface->ia_assignments, head) {
if (c->length == 128 || c->length == 0)
return false;
}
-
static bool assign_na(struct interface *iface, struct dhcpv6_assignment *assign)
{
- bool match = false;
- for (size_t i = 0; i < iface->ia_addr_len; ++i) {
- if (!iface->ia_addr[i].has_class) {
- match = true;
- continue;
- } else if (assign->classes_cnt) {
- for (size_t j = 0; j < assign->classes_cnt; ++j)
- if (assign->classes[j] == iface->ia_addr[i].class)
- match = true;
- } else if (assign->all_class) {
- match = true;
- }
- }
-
- if (!match)
- return false;
-
- // Seed RNG with checksum of DUID
+ /* Seed RNG with checksum of DUID */
uint32_t seed = 0;
for (size_t i = 0; i < assign->clid_len; ++i)
seed += assign->clid_data[i];
srand(seed);
- // Try to assign up to 100x
+ /* Try to assign up to 100x */
for (size_t i = 0; i < 100; ++i) {
uint32_t try;
do try = ((uint32_t)rand()) % 0x0fff; while (try < 0x100);
assign->assigned = try;
list_add_tail(&assign->head, &c->head);
return true;
- } else if (c->assigned == try) {
+ } else if (c->assigned == try)
break;
- }
}
}
return false;
}
-
-static int prefixcmp(const void *va, const void *vb)
+void dhcpv6_ia_preupdate(struct interface *iface)
{
- const struct odhcpd_ipaddr *a = va, *b = vb;
- uint32_t a_pref = ((a->addr.s6_addr[0] & 0xfe) != 0xfc) ? a->preferred : 1;
- uint32_t b_pref = ((b->addr.s6_addr[0] & 0xfe) != 0xfc) ? b->preferred : 1;
- return (a_pref < b_pref) ? 1 : (a_pref > b_pref) ? -1 : 0;
-}
+ if (iface->dhcpv6 != RELAYD_SERVER)
+ return;
+ struct dhcpv6_assignment *c, *border = list_last_entry(
+ &iface->ia_assignments, struct dhcpv6_assignment, head);
-static void update(struct interface *iface)
-{
- struct odhcpd_ipaddr addr[8];
- memset(addr, 0, sizeof(addr));
- int len = odhcpd_get_interface_addresses(iface->ifindex, addr, 8);
+ list_for_each_entry(c, &iface->ia_assignments, head)
+ if (c != border && !iface->managed)
+ apply_lease(iface, c, false);
+}
- if (len < 0)
+void dhcpv6_ia_postupdate(struct interface *iface, time_t now)
+{
+ if (iface->dhcpv6 != RELAYD_SERVER)
return;
- qsort(addr, len, sizeof(*addr), prefixcmp);
-
- time_t now = odhcpd_time();
int minprefix = -1;
-
- for (int i = 0; i < len; ++i) {
- if (addr[i].prefix > minprefix)
- minprefix = addr[i].prefix;
-
- addr[i].addr.s6_addr32[3] = 0;
-
- if (addr[i].preferred < UINT32_MAX - now)
- addr[i].preferred += now;
-
- if (addr[i].valid < UINT32_MAX - now)
- addr[i].valid += now;
+ for (size_t i = 0; i < iface->ia_addr_len; ++i) {
+ if (iface->ia_addr[i].preferred > (uint32_t)now &&
+ iface->ia_addr[i].prefix < 64 &&
+ iface->ia_addr[i].prefix > minprefix)
+ minprefix = iface->ia_addr[i].prefix;
}
- struct dhcpv6_assignment *border = list_last_entry(&iface->ia_assignments, struct dhcpv6_assignment, head);
- border->assigned = 1 << (64 - minprefix);
+ struct dhcpv6_assignment *border = list_last_entry(
+ &iface->ia_assignments, struct dhcpv6_assignment, head);
- bool change = len != (int)iface->ia_addr_len;
- for (int i = 0; !change && i < len; ++i)
- if (addr[i].addr.s6_addr32[0] != iface->ia_addr[i].addr.s6_addr32[0] ||
- addr[i].addr.s6_addr32[1] != iface->ia_addr[i].addr.s6_addr32[1] ||
- (addr[i].preferred > 0) != (iface->ia_addr[i].preferred > 0) ||
- (addr[i].valid > (uint32_t)now + 7200) !=
- (iface->ia_addr[i].valid > (uint32_t)now + 7200))
- change = true;
+ if (minprefix > 32 && minprefix <= 64)
+ border->assigned = 1U << (64 - minprefix);
+ else
+ border->assigned = 0;
- if (change) {
- struct dhcpv6_assignment *c;
- list_for_each_entry(c, &iface->ia_assignments, head)
- if (c != border)
- apply_lease(iface, c, false);
- }
-
- memcpy(iface->ia_addr, addr, len * sizeof(*addr));
- iface->ia_addr_len = len;
+ struct list_head reassign = LIST_HEAD_INIT(reassign);
+ struct dhcpv6_assignment *c, *d;
+ list_for_each_entry_safe(c, d, &iface->ia_assignments, head) {
+ if (c->clid_len == 0 || (!INFINITE_VALID(c->valid_until) && c->valid_until < now) ||
+ c->managed_size)
+ continue;
- if (change) { // Addresses / prefixes have changed
- struct list_head reassign = LIST_HEAD_INIT(reassign);
- struct dhcpv6_assignment *c, *d;
- list_for_each_entry_safe(c, d, &iface->ia_assignments, head) {
- if (c->clid_len == 0 || c->valid_until < now || c->managed_size)
- continue;
+ if (c->length < 128 && c->assigned >= border->assigned && c != border)
+ list_move(&c->head, &reassign);
+ else if (c != border)
+ apply_lease(iface, c, true);
- if (c->length < 128 && c->assigned >= border->assigned && c != border)
- list_move(&c->head, &reassign);
- else if (c != border)
- apply_lease(iface, c, true);
-
- if (c->accept_reconf && c->reconf_cnt == 0) {
- c->reconf_cnt = 1;
- c->reconf_sent = now;
- send_reconf(iface, c);
-
- // Leave all other assignments of that client alone
- struct dhcpv6_assignment *a;
- list_for_each_entry(a, &iface->ia_assignments, head)
- if (a != c && a->clid_len == c->clid_len &&
- !memcmp(a->clid_data, c->clid_data, a->clid_len))
- c->reconf_cnt = INT_MAX;
- }
+ if (c->accept_reconf && c->reconf_cnt == 0) {
+ c->reconf_cnt = 1;
+ c->reconf_sent = now;
+ send_reconf(iface, c);
+
+ /* Leave all other assignments of that client alone */
+ struct dhcpv6_assignment *a;
+ list_for_each_entry(a, &iface->ia_assignments, head)
+ if (a != c && a->clid_len == c->clid_len &&
+ !memcmp(a->clid_data, c->clid_data, a->clid_len))
+ c->reconf_cnt = INT_MAX;
}
+ }
- while (!list_empty(&reassign)) {
- c = list_first_entry(&reassign, struct dhcpv6_assignment, head);
- list_del(&c->head);
- if (!assign_pd(iface, c)) {
- c->assigned = 0;
- list_add(&c->head, &iface->ia_assignments);
- }
+ while (!list_empty(&reassign)) {
+ c = list_first_entry(&reassign, struct dhcpv6_assignment, head);
+ list_del(&c->head);
+ if (!assign_pd(iface, c)) {
+ c->assigned = 0;
+ list_add(&c->head, &iface->ia_assignments);
}
-
- dhcpv6_write_statefile();
}
-}
+ dhcpv6_write_statefile();
+}
static void reconf_timer(struct uloop_timeout *event)
{
struct dhcpv6_assignment *a, *n;
list_for_each_entry_safe(a, n, &iface->ia_assignments, head) {
- if (a->valid_until < now) {
+ if (!INFINITE_VALID(a->valid_until) && a->valid_until < now) {
if ((a->length < 128 && a->clid_len > 0) ||
- (a->length == 128 && a->clid_len == 0)) {
- list_del(&a->head);
+ (a->length == 128 && a->clid_len == 0))
free_dhcpv6_assignment(a);
- }
+
} else if (a->reconf_cnt > 0 && a->reconf_cnt < 8 &&
now > a->reconf_sent + (1 << a->reconf_cnt)) {
++a->reconf_cnt;
uloop_timeout_set(event, 2000);
}
-
static size_t append_reply(uint8_t *buf, size_t buflen, uint16_t status,
const struct dhcpv6_ia_hdr *ia, struct dhcpv6_assignment *a,
struct interface *iface, bool request)
datalen += sizeof(stat);
} else {
if (a) {
- uint32_t pref = 3600;
- uint32_t valid = 3600;
+ uint32_t leasetime;
+ if (a->leasetime > 0)
+ leasetime = a->leasetime;
+ else
+ leasetime = iface->dhcpv4_leasetime;
+
+ if (leasetime == 0)
+ leasetime = 3600;
+ else if (leasetime < 60)
+ leasetime = 60;
+
+ uint32_t pref = leasetime;
+ uint32_t valid = leasetime;
struct odhcpd_ipaddr *addrs = (a->managed) ? a->managed : iface->ia_addr;
size_t addrlen = (a->managed) ? (size_t)a->managed_size : iface->ia_addr_len;
+ size_t m = elect_addr(addrs, addrlen);
for (size_t i = 0; i < addrlen; ++i) {
- bool match = true;
- if (addrs[i].has_class) {
- match = false;
- if (a->classes_cnt) {
- for (size_t j = 0; j < a->classes_cnt; ++j)
- if (a->classes[j] == addrs[i].class)
- match = true;
- } else if (a->all_class) {
- match = true;
- }
- }
+ uint32_t prefix_pref = addrs[i].preferred;
+ uint32_t prefix_valid = addrs[i].valid;
- if (!match)
+ if (!valid_addr(&addrs[i], now))
continue;
- uint32_t prefix_pref = addrs[i].preferred - now;
- uint32_t prefix_valid = addrs[i].valid - now;
+ if (prefix_pref != UINT32_MAX)
+ prefix_pref -= now;
- if (addrs[i].prefix > 96 ||
- addrs[i].preferred <= (uint32_t)now)
- continue;
-
- if (prefix_pref > 86400)
- prefix_pref = 86400;
-
- if (prefix_valid > 86400)
- prefix_valid = 86400;
-
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- struct {
- uint16_t code;
- uint16_t length;
- uint16_t class;
- } pclass = {htons(DHCPV6_OPT_PREFIX_CLASS),
- htons(2), htons(iface->ia_addr[i].class)};
-#endif
+ if (prefix_valid != UINT32_MAX)
+ prefix_valid -= now;
if (a->length < 128) {
struct dhcpv6_ia_prefix p = {
size_t entrlen = sizeof(p) - 4;
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- if (iface->ia_addr[i].has_class) {
- entrlen += sizeof(pclass);
- p.len = htons(entrlen);
- }
-#endif
-
if (datalen + entrlen + 4 > buflen ||
- (a->assigned == 0 && a->managed_size == 0))
+ (a->assigned == 0 && a->managed_size == 0) ||
+ !valid_prefix_length(a, addrs[i].prefix))
continue;
memcpy(buf + datalen, &p, sizeof(p));
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- memcpy(buf + datalen + sizeof(p), &pclass, sizeof(pclass));
-#endif
datalen += entrlen + 4;
} else {
struct dhcpv6_ia_addr n = {
n.addr.s6_addr32[3] = htonl(a->assigned);
size_t entrlen = sizeof(n) - 4;
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- if (iface->ia_addr[i].has_class) {
- entrlen += sizeof(pclass);
- n.len = htons(entrlen);
- }
-#endif
-
- if (datalen + entrlen + 4 > buflen || a->assigned == 0)
+ if (!ADDR_ENTRY_VALID_IA_ADDR(iface, i, m, addrs) ||
+ a->assigned == 0 ||
+ datalen + entrlen + 4 > buflen)
continue;
memcpy(buf + datalen, &n, sizeof(n));
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- memcpy(buf + datalen + sizeof(n), &pclass, sizeof(pclass));
-#endif
datalen += entrlen + 4;
}
- // Calculate T1 / T2 based on non-deprecated addresses
+ /* Calculate T1 / T2 based on non-deprecated addresses */
if (prefix_pref > 0) {
if (prefix_pref < pref)
pref = prefix_pref;
}
}
- a->valid_until = valid + now;
- out.t1 = htonl(pref * 5 / 10);
- out.t2 = htonl(pref * 8 / 10);
+ if (!INFINITE_VALID(a->valid_until))
+ /* UINT32_MAX is considered as infinite leasetime */
+ a->valid_until = (valid == UINT32_MAX) ? 0 : valid + now;
+
+ out.t1 = htonl((pref == UINT32_MAX) ? pref : pref * 5 / 10);
+ out.t2 = htonl((pref == UINT32_MAX) ? pref : pref * 8 / 10);
if (!out.t1)
out.t1 = htonl(1);
size_t addrlen = (a->managed) ? (size_t)a->managed_size : iface->ia_addr_len;
for (size_t i = 0; i < addrlen; ++i) {
- if (addrs[i].prefix > 96 ||
- addrs[i].preferred <= (uint32_t)now)
+ if (!valid_addr(&addrs[i], now))
continue;
struct in6_addr addr = addrs[i].addr;
addr.s6_addr32[1] |= htonl(a->assigned);
if (!memcmp(&p->addr, &addr, sizeof(addr)) &&
- p->prefix == a->length)
+ p->prefix == ((a->managed) ? addrs[i].prefix : a->length))
found = true;
} else {
addr.s6_addr32[3] = htonl(a->assigned);
return datalen;
}
+static void dhcpv6_log(uint8_t msgtype, struct interface *iface, time_t now,
+ const char *duidbuf, bool is_pd, struct dhcpv6_assignment *a, int code)
+{
+ const char *type = "UNKNOWN";
+ const char *status = "UNKNOWN";
+
+ if (msgtype == DHCPV6_MSG_RENEW)
+ return;
+
+ switch (msgtype) {
+ case DHCPV6_MSG_SOLICIT:
+ type = "SOLICIT";
+ break;
+ case DHCPV6_MSG_REQUEST:
+ type = "REQUEST";
+ break;
+ case DHCPV6_MSG_CONFIRM:
+ type = "CONFIRM";
+ break;
+ case DHCPV6_MSG_RENEW:
+ type = "RENEW";
+ break;
+ case DHCPV6_MSG_REBIND:
+ type = "REBIND";
+ break;
+ case DHCPV6_MSG_RELEASE:
+ type = "RELEASE";
+ break;
+ case DHCPV6_MSG_DECLINE:
+ type = "DECLINE";
+ break;
+ }
+
+ switch (code) {
+ case DHCPV6_STATUS_OK:
+ status = "ok";
+ break;
+ case DHCPV6_STATUS_NOADDRSAVAIL:
+ status = "no addresses available";
+ break;
+ case DHCPV6_STATUS_NOBINDING:
+ status = "no binding";
+ break;
+ case DHCPV6_STATUS_NOTONLINK:
+ status = "not on-link";
+ break;
+ case DHCPV6_STATUS_NOPREFIXAVAIL:
+ status = "no prefix available";
+ break;
+ }
+
+ char leasebuf[256] = "";
+
+ if (a) {
+ struct odhcpd_ipaddr *addrs = (a->managed) ? a->managed : iface->ia_addr;
+ size_t addrlen = (a->managed) ? (size_t)a->managed_size : iface->ia_addr_len;
+ size_t lbsize = 0;
+ size_t m = elect_addr(addrs, addrlen);
+ char addrbuf[INET6_ADDRSTRLEN];
+
+ for (size_t i = 0; i < addrlen; ++i) {
+ if (!valid_addr(&addrs[i], now))
+ continue;
+
+ struct in6_addr addr = addrs[i].addr;
+ int prefix = a->managed ? addrs[i].prefix : a->length;
+ if (prefix == 128) {
+ if (!ADDR_ENTRY_VALID_IA_ADDR(iface, i, m, addrs) ||
+ a->assigned == 0)
+ continue;
+
+ addr.s6_addr32[3] = htonl(a->assigned);
+ }
+ else {
+ if (!valid_prefix_length(a, addrs[i].prefix))
+ continue;
+
+ addr.s6_addr32[1] |= htonl(a->assigned);
+ }
+
+ inet_ntop(AF_INET6, &addr, addrbuf, sizeof(addrbuf));
+ lbsize += snprintf(leasebuf + lbsize, sizeof(leasebuf) - lbsize, "%s/%d ", addrbuf, prefix);
+ }
+ }
+
+ syslog(LOG_WARNING, "DHCPV6 %s %s from %s on %s: %s %s", type, (is_pd) ? "IA_PD" : "IA_NA",
+ duidbuf, iface->ifname, status, leasebuf);
+}
ssize_t dhcpv6_handle_ia(uint8_t *buf, size_t buflen, struct interface *iface,
const struct sockaddr_in6 *addr, const void *data, const uint8_t *end)
const struct dhcpv6_client_header *hdr = data;
uint8_t *start = (uint8_t*)&hdr[1], *odata;
uint16_t otype, olen;
-
- // Find and parse client-id and hostname
+ /* Find and parse client-id and hostname */
bool accept_reconf = false;
uint8_t *clid_data = NULL, clid_len = 0, mac[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
char hostname[256];
size_t hostname_len = 0;
- bool class_oro = false;
+ bool notonlink = false;
+ char duidbuf[261];
+
dhcpv6_for_each_option(start, end, otype, olen, odata) {
if (otype == DHCPV6_OPT_CLIENTID) {
clid_data = odata;
memcpy(mac, &odata[8], sizeof(mac));
else if (olen == 10 && odata[0] == 0 && odata[1] == 3)
memcpy(mac, &odata[4], sizeof(mac));
+
+ if (olen <= 130)
+ odhcpd_hexlify(duidbuf, odata, olen);
} else if (otype == DHCPV6_OPT_FQDN && olen >= 2 && olen <= 255) {
uint8_t fqdn_buf[256];
memcpy(fqdn_buf, odata, olen);
if (dn_expand(&fqdn_buf[1], &fqdn_buf[olen], &fqdn_buf[1], hostname, sizeof(hostname)) > 0)
hostname_len = strcspn(hostname, ".");
- } else if (otype == DHCPV6_OPT_ORO) {
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- for (size_t i = 0; i + 1 < olen; i += 2) {
- if (odata[i] == (DHCPV6_OPT_PREFIX_CLASS >> 8) &&
- odata[i + 1] == (DHCPV6_OPT_PREFIX_CLASS & 0xff))
- class_oro = true;
- }
-#endif
- } else if (otype == DHCPV6_OPT_RECONF_ACCEPT) {
+ } else if (otype == DHCPV6_OPT_RECONF_ACCEPT)
accept_reconf = true;
- }
}
if (!clid_data || !clid_len || clid_len > 130)
goto out;
- update(iface);
- bool update_state = false;
-
struct dhcpv6_assignment *first = NULL;
dhcpv6_for_each_option(start, end, otype, olen, odata) {
bool is_pd = (otype == DHCPV6_OPT_IA_PD);
bool is_na = (otype == DHCPV6_OPT_IA_NA);
+ bool ia_addr_present = false;
if (!is_pd && !is_na)
continue;
uint8_t reqlen = (is_pd) ? 62 : 128;
uint32_t reqhint = 0;
- const uint8_t classes_max = 32;
- uint8_t classes_cnt = 0;
- uint16_t classes[classes_max];
-
- // Parse request hint for IA-PD
+ /* Parse request hint for IA-PD */
if (is_pd) {
uint8_t *sdata;
uint16_t stype, slen;
if (reqlen > 32 && reqlen <= 64)
reqhint &= (1U << (64 - reqlen)) - 1;
}
-
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- uint8_t *xdata;
- uint16_t xtype, xlen;
- dhcpv6_for_each_option(&p[1], sdata + slen, xtype, xlen, xdata) {
- if (xtype != DHCPV6_OPT_PREFIX_CLASS || xlen != 2)
- continue;
-
- if (classes_cnt >= classes_max)
- continue;
-
- classes[classes_cnt++] = (uint16_t)xdata[0] << 8 | (uint16_t)xdata[1];
- }
-#endif
}
if (reqlen > 64)
if (stype != DHCPV6_OPT_IA_ADDR || slen < sizeof(struct dhcpv6_ia_addr) - 4)
continue;
-#ifdef DHCPV6_OPT_PREFIX_CLASS
- uint8_t *xdata;
- uint16_t xtype, xlen;
- struct dhcpv6_ia_addr *p = (struct dhcpv6_ia_addr*)&sdata[-4];
- dhcpv6_for_each_option(&p[1], sdata + slen, xtype, xlen, xdata) {
- if (xtype != DHCPV6_OPT_PREFIX_CLASS || xlen != 2)
- continue;
-
- if (classes_cnt >= classes_max)
- continue;
-
- classes[classes_cnt++] = (uint16_t)xdata[0] << 8 | (uint16_t)xdata[1];
- }
-#endif
+ ia_addr_present = true;
}
}
- // Find assignment
+ /* Find assignment */
struct dhcpv6_assignment *c, *a = NULL;
list_for_each_entry(c, &iface->ia_assignments, head) {
if (((c->clid_len == clid_len && !memcmp(c->clid_data, clid_data, clid_len)) ||
(c->clid_len >= clid_len && !c->clid_data[0] && !c->clid_data[1]
- && !memcmp(c->mac, mac, sizeof(mac)))) &&
- (c->iaid == ia->iaid || c->valid_until < now) &&
+ && !memcmp(c->mac, mac, sizeof(mac)))) &&
+ (c->iaid == ia->iaid || INFINITE_VALID(c->valid_until) || now < c->valid_until) &&
((is_pd && c->length <= 64) || (is_na && c->length == 128))) {
a = c;
- // Reset state
+ /* Reset state */
apply_lease(iface, a, false);
memcpy(a->clid_data, clid_data, clid_len);
a->clid_len = clid_len;
a->peer = *addr;
a->reconf_cnt = 0;
a->reconf_sent = 0;
- a->all_class = class_oro;
- a->classes_cnt = classes_cnt;
- a->classes = realloc(a->classes, classes_cnt * sizeof(uint16_t));
- if (a->classes)
- memcpy(a->classes, classes, classes_cnt * sizeof(uint16_t));
break;
}
}
- // Generic message handling
+ /* Generic message handling */
uint16_t status = DHCPV6_STATUS_OK;
- if (a && a->managed_size < 0) {
+ if (a && a->managed_size < 0)
return -1;
- } else if (hdr->msg_type == DHCPV6_MSG_SOLICIT || hdr->msg_type == DHCPV6_MSG_REQUEST) {
+
+ if (hdr->msg_type == DHCPV6_MSG_SOLICIT || hdr->msg_type == DHCPV6_MSG_REQUEST) {
bool assigned = !!a;
- if (!a && !iface->no_dynamic_dhcp) { // Create new binding
+ if (!a && !iface->no_dynamic_dhcp) {
+ /* Create new binding */
a = calloc(1, sizeof(*a) + clid_len);
if (a) {
a->clid_len = clid_len;
a->length = reqlen;
a->peer = *addr;
a->assigned = reqhint;
- a->all_class = class_oro;
- a->classes_cnt = classes_cnt;
- if (classes_cnt) {
- a->classes = malloc(classes_cnt * sizeof(uint16_t));
- if (a->classes)
- memcpy(a->classes, classes, classes_cnt * sizeof(uint16_t));
- }
+ /* Set valid time to current time indicating */
+ /* assignment is not having infinite lifetime */
+ a->valid_until = now;
if (first)
memcpy(a->key, first->key, sizeof(a->key));
}
}
- if (!assigned || iface->ia_addr_len == 0) { // Set error status
+ if (!assigned || iface->ia_addr_len == 0)
+ /* Set error status */
status = (is_pd) ? DHCPV6_STATUS_NOPREFIXAVAIL : DHCPV6_STATUS_NOADDRSAVAIL;
- } else if (assigned && !first) { //
+ else if (assigned && !first) {
size_t handshake_len = 4;
buf[0] = 0;
buf[1] = DHCPV6_OPT_RECONF_ACCEPT;
ia_response_len = append_reply(buf, buflen, status, ia, a, iface, true);
- // Was only a solicitation: mark binding for removal
+ /* Was only a solicitation: mark binding for removal */
if (assigned && hdr->msg_type == DHCPV6_MSG_SOLICIT) {
- a->valid_until = now + 15;
+ a->flags &= ~OAF_BOUND;
+
+ if (!(a->flags & OAF_STATIC))
+ a->valid_until = now;
} else if (assigned && hdr->msg_type == DHCPV6_MSG_REQUEST) {
if (hostname_len > 0) {
a->hostname = realloc(a->hostname, hostname_len + 1);
}
}
a->accept_reconf = accept_reconf;
+ a->flags |= OAF_BOUND;
apply_lease(iface, a, true);
- update_state = true;
- } else if (!assigned && a) { // Cleanup failed assignment
+ } else if (!assigned && a && a->managed_size == 0) {
+ /* Cleanup failed assignment */
free_dhcpv6_assignment(a);
+ a = NULL;
}
} else if (hdr->msg_type == DHCPV6_MSG_RENEW ||
hdr->msg_type == DHCPV6_MSG_RELEASE ||
} else if (hdr->msg_type == DHCPV6_MSG_RENEW ||
hdr->msg_type == DHCPV6_MSG_REBIND) {
ia_response_len = append_reply(buf, buflen, status, ia, a, iface, false);
- if (a)
+ if (a) {
+ a->flags |= OAF_BOUND;
apply_lease(iface, a, true);
+ }
} else if (hdr->msg_type == DHCPV6_MSG_RELEASE) {
- a->valid_until = 0;
+ if (!(a->flags & OAF_STATIC))
+ a->valid_until = now - 1;
+
+ a->flags &= ~OAF_BOUND;
apply_lease(iface, a, false);
- update_state = true;
} else if (hdr->msg_type == DHCPV6_MSG_DECLINE && a->length == 128) {
- a->clid_len = 0;
- a->valid_until = now + 3600; // Block address for 1h
- update_state = true;
+ a->flags &= ~OAF_BOUND;
+
+ if (!(a->flags & OAF_STATIC)) {
+ a->clid_len = 0;
+ a->valid_until = now + 3600; /* Block address for 1h */
+ }
}
- } else if (hdr->msg_type == DHCPV6_MSG_CONFIRM) {
- // Always send NOTONLINK for CONFIRM so that clients restart connection
+ } else if (hdr->msg_type == DHCPV6_MSG_CONFIRM && ia_addr_present) {
+ /* Send NOTONLINK for CONFIRM with addr present so that clients restart connection */
status = DHCPV6_STATUS_NOTONLINK;
ia_response_len = append_reply(buf, buflen, status, ia, a, iface, true);
+ notonlink = true;
}
buf += ia_response_len;
buflen -= ia_response_len;
response_len += ia_response_len;
+ dhcpv6_log(hdr->msg_type, iface, now, duidbuf, is_pd, a, status);
}
- if (hdr->msg_type == DHCPV6_MSG_RELEASE && response_len + 6 < buflen) {
+ if ((hdr->msg_type == DHCPV6_MSG_RELEASE || hdr->msg_type == DHCPV6_MSG_DECLINE || notonlink) &&
+ response_len + 6 < buflen) {
buf[0] = 0;
buf[1] = DHCPV6_OPT_STATUS;
buf[2] = 0;
buf[3] = 2;
buf[4] = 0;
- buf[5] = DHCPV6_STATUS_OK;
+ buf[5] = (notonlink) ? DHCPV6_STATUS_NOTONLINK : DHCPV6_STATUS_OK;
response_len += 6;
}
- if (update_state)
- dhcpv6_write_statefile();
+ dhcpv6_write_statefile();
out:
return response_len;
projects / project / odhcpd.git / blobdiff