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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
Copyright © 2014-2015 Intel Corporation. All rights reserved.
***/
#include <errno.h>
#include "alloc-util.h"
#include "dhcp6-lease-internal.h"
#include "dhcp6-protocol.h"
#include "strv.h"
#include "util.h"
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->iaaddr.lifetime_valid);
if (valid < t)
valid = t;
}
t = be32toh(ia->ia_na.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;
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) {
uint8_t *serverid;
assert_return(lease, -EINVAL);
assert_return(id, -EINVAL);
serverid = memdup(id, len);
if (!serverid)
return -ENOMEM;
free_and_replace(lease->serverid, serverid);
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);
if (!lease->serverid)
return -ENOMSG;
if (id)
*id = lease->serverid;
if (len)
*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(preference, -EINVAL);
if (!lease)
return -EINVAL;
*preference = lease->preference;
return 0;
}
int dhcp6_lease_set_rapid_commit(sd_dhcp6_lease *lease) {
assert_return(lease, -EINVAL);
lease->rapid_commit = true;
return 0;
}
int dhcp6_lease_get_rapid_commit(sd_dhcp6_lease *lease, bool *rapid_commit) {
assert_return(lease, -EINVAL);
assert_return(rapid_commit, -EINVAL);
*rapid_commit = lease->rapid_commit;
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.ia_na.id;
return 0;
}
int dhcp6_lease_get_pd_iaid(sd_dhcp6_lease *lease, be32_t *iaid) {
assert_return(lease, -EINVAL);
assert_return(iaid, -EINVAL);
*iaid = lease->pd.ia_pd.id;
return 0;
}
int sd_dhcp6_lease_get_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->iaaddr.address,
sizeof(struct in6_addr));
*lifetime_preferred =
be32toh(lease->addr_iter->iaaddr.lifetime_preferred);
*lifetime_valid = be32toh(lease->addr_iter->iaaddr.lifetime_valid);
lease->addr_iter = lease->addr_iter->addresses_next;
return 0;
}
void sd_dhcp6_lease_reset_address_iter(sd_dhcp6_lease *lease) {
if (lease)
lease->addr_iter = lease->ia.addresses;
}
int sd_dhcp6_lease_get_pd(sd_dhcp6_lease *lease, struct in6_addr *prefix,
uint8_t *prefix_len,
uint32_t *lifetime_preferred,
uint32_t *lifetime_valid) {
assert_return(lease, -EINVAL);
assert_return(prefix, -EINVAL);
assert_return(prefix_len, -EINVAL);
assert_return(lifetime_preferred, -EINVAL);
assert_return(lifetime_valid, -EINVAL);
if (!lease->prefix_iter)
return -ENOMSG;
memcpy(prefix, &lease->prefix_iter->iapdprefix.address,
sizeof(struct in6_addr));
*prefix_len = lease->prefix_iter->iapdprefix.prefixlen;
*lifetime_preferred =
be32toh(lease->prefix_iter->iapdprefix.lifetime_preferred);
*lifetime_valid =
be32toh(lease->prefix_iter->iapdprefix.lifetime_valid);
lease->prefix_iter = lease->prefix_iter->addresses_next;
return 0;
}
void sd_dhcp6_lease_reset_pd_prefix_iter(sd_dhcp6_lease *lease) {
if (lease)
lease->prefix_iter = lease->pd.addresses;
}
int dhcp6_lease_set_dns(sd_dhcp6_lease *lease, uint8_t *optval, size_t optlen) {
int r;
assert_return(lease, -EINVAL);
assert_return(optval, -EINVAL);
if (!optlen)
return 0;
r = dhcp6_option_parse_ip6addrs(optval, optlen, &lease->dns,
lease->dns_count,
&lease->dns_allocated);
if (r < 0) {
log_dhcp6_client(client, "Invalid DNS server option: %s",
strerror(-r));
return r;
}
lease->dns_count = r;
return 0;
}
int sd_dhcp6_lease_get_dns(sd_dhcp6_lease *lease, struct in6_addr **addrs) {
assert_return(lease, -EINVAL);
assert_return(addrs, -EINVAL);
if (lease->dns_count) {
*addrs = lease->dns;
return lease->dns_count;
}
return -ENOENT;
}
int dhcp6_lease_set_domains(sd_dhcp6_lease *lease, uint8_t *optval,
size_t optlen) {
int r;
char **domains;
assert_return(lease, -EINVAL);
assert_return(optval, -EINVAL);
if (!optlen)
return 0;
r = dhcp6_option_parse_domainname(optval, optlen, &domains);
if (r < 0)
return 0;
strv_free_and_replace(lease->domains, domains);
lease->domains_count = r;
return r;
}
int sd_dhcp6_lease_get_domains(sd_dhcp6_lease *lease, char ***domains) {
assert_return(lease, -EINVAL);
assert_return(domains, -EINVAL);
if (lease->domains_count) {
*domains = lease->domains;
return lease->domains_count;
}
return -ENOENT;
}
int dhcp6_lease_set_ntp(sd_dhcp6_lease *lease, uint8_t *optval, size_t optlen) {
int r;
uint16_t subopt;
size_t sublen;
uint8_t *subval;
assert_return(lease, -EINVAL);
assert_return(optval, -EINVAL);
lease->ntp = mfree(lease->ntp);
lease->ntp_count = 0;
lease->ntp_allocated = 0;
while ((r = dhcp6_option_parse(&optval, &optlen, &subopt, &sublen,
&subval)) >= 0) {
int s;
char **servers;
switch(subopt) {
case DHCP6_NTP_SUBOPTION_SRV_ADDR:
case DHCP6_NTP_SUBOPTION_MC_ADDR:
if (sublen != 16)
return 0;
s = dhcp6_option_parse_ip6addrs(subval, sublen,
&lease->ntp,
lease->ntp_count,
&lease->ntp_allocated);
if (s < 0)
return s;
lease->ntp_count = s;
break;
case DHCP6_NTP_SUBOPTION_SRV_FQDN:
r = dhcp6_option_parse_domainname(subval, sublen,
&servers);
if (r < 0)
return 0;
strv_free_and_replace(lease->ntp_fqdn, servers);
lease->ntp_fqdn_count = r;
break;
}
}
if (r != -ENOMSG)
return r;
return 0;
}
int dhcp6_lease_set_sntp(sd_dhcp6_lease *lease, uint8_t *optval, size_t optlen) {
int r;
assert_return(lease, -EINVAL);
assert_return(optval, -EINVAL);
if (!optlen)
return 0;
if (lease->ntp || lease->ntp_fqdn) {
log_dhcp6_client(client, "NTP information already provided");
return 0;
}
log_dhcp6_client(client, "Using deprecated SNTP information");
r = dhcp6_option_parse_ip6addrs(optval, optlen, &lease->ntp,
lease->ntp_count,
&lease->ntp_allocated);
if (r < 0) {
log_dhcp6_client(client, "Invalid SNTP server option: %s",
strerror(-r));
return r;
}
lease->ntp_count = r;
return 0;
}
int sd_dhcp6_lease_get_ntp_addrs(sd_dhcp6_lease *lease,
struct in6_addr **addrs) {
assert_return(lease, -EINVAL);
assert_return(addrs, -EINVAL);
if (lease->ntp_count) {
*addrs = lease->ntp;
return lease->ntp_count;
}
return -ENOENT;
}
int sd_dhcp6_lease_get_ntp_fqdn(sd_dhcp6_lease *lease, char ***ntp_fqdn) {
assert_return(lease, -EINVAL);
assert_return(ntp_fqdn, -EINVAL);
if (lease->ntp_fqdn_count) {
*ntp_fqdn = lease->ntp_fqdn;
return lease->ntp_fqdn_count;
}
return -ENOENT;
}
static sd_dhcp6_lease *dhcp6_lease_free(sd_dhcp6_lease *lease) {
assert(lease);
free(lease->serverid);
dhcp6_lease_free_ia(&lease->ia);
dhcp6_lease_free_ia(&lease->pd);
free(lease->dns);
lease->domains = strv_free(lease->domains);
free(lease->ntp);
lease->ntp_fqdn = strv_free(lease->ntp_fqdn);
return mfree(lease);
}
DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_lease, sd_dhcp6_lease, dhcp6_lease_free);
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 = 1;
LIST_HEAD_INIT(lease->ia.addresses);
*ret = lease;
return 0;
}
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