9a7225de67
Since we now have the possibility to request prefixes to be delegated without corresponding IPv6 addresses, it does not make sense to store lease T1 and T2 timeouts in the otherwise unused IA_NA structure. Therefore lease timeouts T1 and T2 are moved to the DHCPv6 client structure, as there will be only one set of stateful timeouts required by RFC 7550, Section 4.3.
408 lines
11 KiB
C
408 lines
11 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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Copyright © 2014-2015 Intel Corporation. All rights reserved.
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***/
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#include <errno.h>
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#include "alloc-util.h"
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#include "dhcp6-lease-internal.h"
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#include "dhcp6-protocol.h"
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#include "strv.h"
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#include "util.h"
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int dhcp6_lease_ia_rebind_expire(const DHCP6IA *ia, uint32_t *expire) {
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DHCP6Address *addr;
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uint32_t valid = 0, t;
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assert_return(ia, -EINVAL);
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assert_return(expire, -EINVAL);
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LIST_FOREACH(addresses, addr, ia->addresses) {
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t = be32toh(addr->iaaddr.lifetime_valid);
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if (valid < t)
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valid = t;
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}
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t = be32toh(ia->ia_na.lifetime_t2);
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if (t > valid)
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return -EINVAL;
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*expire = valid - t;
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return 0;
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}
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DHCP6IA *dhcp6_lease_free_ia(DHCP6IA *ia) {
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DHCP6Address *address;
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if (!ia)
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return NULL;
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while (ia->addresses) {
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address = ia->addresses;
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LIST_REMOVE(addresses, ia->addresses, address);
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free(address);
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}
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return NULL;
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}
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int dhcp6_lease_set_serverid(sd_dhcp6_lease *lease, const uint8_t *id,
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size_t len) {
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assert_return(lease, -EINVAL);
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assert_return(id, -EINVAL);
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free(lease->serverid);
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lease->serverid = memdup(id, len);
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if (!lease->serverid)
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return -EINVAL;
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lease->serverid_len = len;
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return 0;
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}
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int dhcp6_lease_get_serverid(sd_dhcp6_lease *lease, uint8_t **id, size_t *len) {
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assert_return(lease, -EINVAL);
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if (!lease->serverid)
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return -ENOMSG;
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if (id)
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*id = lease->serverid;
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if (len)
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*len = lease->serverid_len;
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return 0;
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}
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int dhcp6_lease_set_preference(sd_dhcp6_lease *lease, uint8_t preference) {
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assert_return(lease, -EINVAL);
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lease->preference = preference;
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return 0;
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}
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int dhcp6_lease_get_preference(sd_dhcp6_lease *lease, uint8_t *preference) {
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assert_return(preference, -EINVAL);
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if (!lease)
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return -EINVAL;
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*preference = lease->preference;
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return 0;
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}
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int dhcp6_lease_set_rapid_commit(sd_dhcp6_lease *lease) {
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assert_return(lease, -EINVAL);
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lease->rapid_commit = true;
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return 0;
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}
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int dhcp6_lease_get_rapid_commit(sd_dhcp6_lease *lease, bool *rapid_commit) {
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assert_return(lease, -EINVAL);
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assert_return(rapid_commit, -EINVAL);
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*rapid_commit = lease->rapid_commit;
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return 0;
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}
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int dhcp6_lease_get_iaid(sd_dhcp6_lease *lease, be32_t *iaid) {
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assert_return(lease, -EINVAL);
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assert_return(iaid, -EINVAL);
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*iaid = lease->ia.ia_na.id;
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return 0;
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}
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int dhcp6_lease_get_pd_iaid(sd_dhcp6_lease *lease, be32_t *iaid) {
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assert_return(lease, -EINVAL);
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assert_return(iaid, -EINVAL);
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*iaid = lease->pd.ia_pd.id;
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return 0;
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}
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int sd_dhcp6_lease_get_address(sd_dhcp6_lease *lease, struct in6_addr *addr,
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uint32_t *lifetime_preferred,
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uint32_t *lifetime_valid) {
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assert_return(lease, -EINVAL);
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assert_return(addr, -EINVAL);
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assert_return(lifetime_preferred, -EINVAL);
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assert_return(lifetime_valid, -EINVAL);
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if (!lease->addr_iter)
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return -ENOMSG;
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memcpy(addr, &lease->addr_iter->iaaddr.address,
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sizeof(struct in6_addr));
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*lifetime_preferred =
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be32toh(lease->addr_iter->iaaddr.lifetime_preferred);
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*lifetime_valid = be32toh(lease->addr_iter->iaaddr.lifetime_valid);
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lease->addr_iter = lease->addr_iter->addresses_next;
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return 0;
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}
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void sd_dhcp6_lease_reset_address_iter(sd_dhcp6_lease *lease) {
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if (lease)
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lease->addr_iter = lease->ia.addresses;
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}
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int sd_dhcp6_lease_get_pd(sd_dhcp6_lease *lease, struct in6_addr *prefix,
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uint8_t *prefix_len,
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uint32_t *lifetime_preferred,
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uint32_t *lifetime_valid) {
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assert_return(lease, -EINVAL);
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assert_return(prefix, -EINVAL);
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assert_return(prefix_len, -EINVAL);
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assert_return(lifetime_preferred, -EINVAL);
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assert_return(lifetime_valid, -EINVAL);
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if (!lease->prefix_iter)
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return -ENOMSG;
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memcpy(prefix, &lease->prefix_iter->iapdprefix.address,
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sizeof(struct in6_addr));
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*prefix_len = lease->prefix_iter->iapdprefix.prefixlen;
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*lifetime_preferred =
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be32toh(lease->prefix_iter->iapdprefix.lifetime_preferred);
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*lifetime_valid =
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be32toh(lease->prefix_iter->iapdprefix.lifetime_valid);
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lease->prefix_iter = lease->prefix_iter->addresses_next;
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return 0;
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}
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void sd_dhcp6_lease_reset_pd_prefix_iter(sd_dhcp6_lease *lease) {
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if (lease)
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lease->prefix_iter = lease->pd.addresses;
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}
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int dhcp6_lease_set_dns(sd_dhcp6_lease *lease, uint8_t *optval, size_t optlen) {
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int r;
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assert_return(lease, -EINVAL);
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assert_return(optval, -EINVAL);
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if (!optlen)
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return 0;
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r = dhcp6_option_parse_ip6addrs(optval, optlen, &lease->dns,
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lease->dns_count,
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&lease->dns_allocated);
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if (r < 0) {
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log_dhcp6_client(client, "Invalid DNS server option: %s",
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strerror(-r));
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return r;
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}
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lease->dns_count = r;
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return 0;
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}
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int sd_dhcp6_lease_get_dns(sd_dhcp6_lease *lease, struct in6_addr **addrs) {
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assert_return(lease, -EINVAL);
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assert_return(addrs, -EINVAL);
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if (lease->dns_count) {
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*addrs = lease->dns;
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return lease->dns_count;
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}
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return -ENOENT;
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}
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int dhcp6_lease_set_domains(sd_dhcp6_lease *lease, uint8_t *optval,
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size_t optlen) {
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int r;
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char **domains;
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assert_return(lease, -EINVAL);
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assert_return(optval, -EINVAL);
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if (!optlen)
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return 0;
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r = dhcp6_option_parse_domainname(optval, optlen, &domains);
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if (r < 0)
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return 0;
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strv_free_and_replace(lease->domains, domains);
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lease->domains_count = r;
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return r;
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}
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int sd_dhcp6_lease_get_domains(sd_dhcp6_lease *lease, char ***domains) {
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assert_return(lease, -EINVAL);
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assert_return(domains, -EINVAL);
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if (lease->domains_count) {
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*domains = lease->domains;
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return lease->domains_count;
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}
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return -ENOENT;
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}
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int dhcp6_lease_set_ntp(sd_dhcp6_lease *lease, uint8_t *optval, size_t optlen) {
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int r;
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uint16_t subopt;
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size_t sublen;
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uint8_t *subval;
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assert_return(lease, -EINVAL);
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assert_return(optval, -EINVAL);
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lease->ntp = mfree(lease->ntp);
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lease->ntp_count = 0;
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lease->ntp_allocated = 0;
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while ((r = dhcp6_option_parse(&optval, &optlen, &subopt, &sublen,
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&subval)) >= 0) {
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int s;
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char **servers;
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switch(subopt) {
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case DHCP6_NTP_SUBOPTION_SRV_ADDR:
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case DHCP6_NTP_SUBOPTION_MC_ADDR:
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if (sublen != 16)
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return 0;
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s = dhcp6_option_parse_ip6addrs(subval, sublen,
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&lease->ntp,
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lease->ntp_count,
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&lease->ntp_allocated);
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if (s < 0)
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return s;
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lease->ntp_count = s;
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break;
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case DHCP6_NTP_SUBOPTION_SRV_FQDN:
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r = dhcp6_option_parse_domainname(subval, sublen,
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&servers);
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if (r < 0)
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return 0;
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strv_free_and_replace(lease->ntp_fqdn, servers);
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lease->ntp_fqdn_count = r;
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break;
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}
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}
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if (r != -ENOMSG)
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return r;
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return 0;
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}
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int dhcp6_lease_set_sntp(sd_dhcp6_lease *lease, uint8_t *optval, size_t optlen) {
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int r;
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assert_return(lease, -EINVAL);
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assert_return(optval, -EINVAL);
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if (!optlen)
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return 0;
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if (lease->ntp || lease->ntp_fqdn) {
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log_dhcp6_client(client, "NTP information already provided");
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return 0;
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}
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log_dhcp6_client(client, "Using deprecated SNTP information");
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r = dhcp6_option_parse_ip6addrs(optval, optlen, &lease->ntp,
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lease->ntp_count,
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&lease->ntp_allocated);
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if (r < 0) {
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log_dhcp6_client(client, "Invalid SNTP server option: %s",
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strerror(-r));
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return r;
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}
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lease->ntp_count = r;
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return 0;
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}
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int sd_dhcp6_lease_get_ntp_addrs(sd_dhcp6_lease *lease,
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struct in6_addr **addrs) {
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assert_return(lease, -EINVAL);
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assert_return(addrs, -EINVAL);
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if (lease->ntp_count) {
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*addrs = lease->ntp;
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return lease->ntp_count;
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}
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return -ENOENT;
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}
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int sd_dhcp6_lease_get_ntp_fqdn(sd_dhcp6_lease *lease, char ***ntp_fqdn) {
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assert_return(lease, -EINVAL);
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assert_return(ntp_fqdn, -EINVAL);
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if (lease->ntp_fqdn_count) {
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*ntp_fqdn = lease->ntp_fqdn;
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return lease->ntp_fqdn_count;
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}
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return -ENOENT;
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}
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static sd_dhcp6_lease *dhcp6_lease_free(sd_dhcp6_lease *lease) {
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assert(lease);
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free(lease->serverid);
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dhcp6_lease_free_ia(&lease->ia);
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dhcp6_lease_free_ia(&lease->pd);
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free(lease->dns);
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lease->domains = strv_free(lease->domains);
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free(lease->ntp);
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lease->ntp_fqdn = strv_free(lease->ntp_fqdn);
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return mfree(lease);
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}
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DEFINE_TRIVIAL_REF_UNREF_FUNC(sd_dhcp6_lease, sd_dhcp6_lease, dhcp6_lease_free);
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int dhcp6_lease_new(sd_dhcp6_lease **ret) {
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sd_dhcp6_lease *lease;
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lease = new0(sd_dhcp6_lease, 1);
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if (!lease)
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return -ENOMEM;
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lease->n_ref = 1;
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LIST_HEAD_INIT(lease->ia.addresses);
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*ret = lease;
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return 0;
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}
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