sd-dhcp6-lease.c revision 709d6710d047566c71f03e579a02c3d99fe15a3e
/***
This file is part of systemd.
Copyright (C) 2014 Tom Gundersen
Copyright (C) 2014 Intel Corporation. All rights reserved.
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include "util.h"
#include "dhcp6-lease-internal.h"
int dhcp6_lease_clear_timers(DHCP6IA *ia) {
assert_return(ia, -EINVAL);
ia->timeout_t1 = sd_event_source_unref(ia->timeout_t1);
ia->timeout_t2 = sd_event_source_unref(ia->timeout_t2);
return 0;
}
int dhcp6_lease_ia_rebind_expire(const DHCP6IA *ia, uint32_t *expire) {
DHCP6Address *addr;
uint32_t valid = 0, t;
assert_return(ia, -EINVAL);
assert_return(expire, -EINVAL);
LIST_FOREACH(addresses, addr, ia->addresses) {
t = be32toh(addr->lifetime_valid);
if (valid < t)
valid = t;
}
t = be32toh(ia->lifetime_t2);
if (t > valid)
return -EINVAL;
*expire = valid - t;
return 0;
}
DHCP6IA *dhcp6_lease_free_ia(DHCP6IA *ia) {
DHCP6Address *address;
if (!ia)
return NULL;
dhcp6_lease_clear_timers(ia);
while (ia->addresses) {
address = ia->addresses;
LIST_REMOVE(addresses, ia->addresses, address);
free(address);
}
return NULL;
}
int dhcp6_lease_set_serverid(sd_dhcp6_lease *lease, const uint8_t *id,
size_t len) {
assert_return(lease, -EINVAL);
assert_return(id, -EINVAL);
free(lease->serverid);
lease->serverid = memdup(id, len);
if (!lease->serverid)
return -EINVAL;
lease->serverid_len = len;
return 0;
}
int dhcp6_lease_get_serverid(sd_dhcp6_lease *lease, uint8_t **id, size_t *len) {
assert_return(lease, -EINVAL);
assert_return(id, -EINVAL);
assert_return(len, -EINVAL);
*id = lease->serverid;
*len = lease->serverid_len;
return 0;
}
int dhcp6_lease_set_preference(sd_dhcp6_lease *lease, uint8_t preference) {
assert_return(lease, -EINVAL);
lease->preference = preference;
return 0;
}
int dhcp6_lease_get_preference(sd_dhcp6_lease *lease, uint8_t *preference) {
assert_return(lease, -EINVAL);
assert_return(preference, -EINVAL);
*preference = lease->preference;
return 0;
}
int dhcp6_lease_get_iaid(sd_dhcp6_lease *lease, be32_t *iaid) {
assert_return(lease, -EINVAL);
assert_return(iaid, -EINVAL);
*iaid = lease->ia.id;
return 0;
}
int sd_dhcp6_lease_get_next_address(sd_dhcp6_lease *lease,
struct in6_addr *addr,
uint32_t *lifetime_preferred,
uint32_t *lifetime_valid) {
assert_return(lease, -EINVAL);
assert_return(addr, -EINVAL);
assert_return(lifetime_preferred, -EINVAL);
assert_return(lifetime_valid, -EINVAL);
if (!lease->addr_iter)
return -ENOMSG;
memcpy(addr, &lease->addr_iter->address, sizeof(struct in6_addr));
*lifetime_preferred = be32toh(lease->addr_iter->lifetime_preferred);
*lifetime_valid = be32toh(lease->addr_iter->lifetime_valid);
lease->addr_iter = lease->addr_iter->addresses_next;
return 0;
}
int sd_dhcp6_lease_get_first_address(sd_dhcp6_lease *lease,
struct in6_addr *addr,
uint32_t *lifetime_preferred,
uint32_t *lifetime_valid) {
assert_return(lease, -EINVAL);
assert_return(addr, -EINVAL);
assert_return(lifetime_preferred, -EINVAL);
assert_return(lifetime_valid, -EINVAL);
if (!lease->ia.addresses)
return -ENOMSG;
lease->addr_iter = lease->ia.addresses;
return sd_dhcp6_lease_get_next_address(lease, addr, lifetime_preferred,
lifetime_valid);
}
sd_dhcp6_lease *sd_dhcp6_lease_ref(sd_dhcp6_lease *lease) {
if (lease)
assert_se(REFCNT_INC(lease->n_ref) >= 2);
return lease;
}
sd_dhcp6_lease *sd_dhcp6_lease_unref(sd_dhcp6_lease *lease) {
if (lease && REFCNT_DEC(lease->n_ref) <= 0) {
free(lease->serverid);
dhcp6_lease_free_ia(&lease->ia);
free(lease);
}
return NULL;
}
int dhcp6_lease_new(sd_dhcp6_lease **ret) {
sd_dhcp6_lease *lease;
lease = new0(sd_dhcp6_lease, 1);
if (!lease)
return -ENOMEM;
lease->n_ref = REFCNT_INIT;
LIST_HEAD_INIT(lease->ia.addresses);
*ret = lease;
return 0;
}