1721 lines
57 KiB
C
1721 lines
57 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/***
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Copyright © 2014 Intel Corporation. All rights reserved.
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***/
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#include <netinet/in.h>
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#include <linux/if.h>
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#include <linux/if_arp.h>
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#include "sd-dhcp6-client.h"
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#include "escape.h"
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#include "hashmap.h"
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#include "hostname-util.h"
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#include "missing_network.h"
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#include "networkd-address.h"
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#include "networkd-dhcp6.h"
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#include "networkd-link.h"
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#include "networkd-manager.h"
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#include "networkd-radv.h"
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#include "siphash24.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "radv-internal.h"
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#include "web-util.h"
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bool link_dhcp6_pd_is_enabled(Link *link) {
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assert(link);
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if (!link->network)
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return false;
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return link->network->dhcp6_pd;
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}
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static bool dhcp6_lease_has_pd_prefix(sd_dhcp6_lease *lease) {
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uint32_t lifetime_preferred, lifetime_valid;
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union in_addr_union pd_prefix;
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uint8_t pd_prefix_len;
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if (!lease)
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return false;
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sd_dhcp6_lease_reset_pd_prefix_iter(lease);
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return sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, &lifetime_preferred, &lifetime_valid) >= 0;
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}
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DHCP6DelegatedPrefix *dhcp6_pd_free(DHCP6DelegatedPrefix *p) {
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if (!p)
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return NULL;
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if (p->link && p->link->manager) {
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hashmap_remove(p->link->manager->dhcp6_prefixes, &p->prefix);
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set_remove(p->link->manager->dhcp6_pd_prefixes, p);
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}
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link_unref(p->link);
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return mfree(p);
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}
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static void dhcp6_pd_hash_func(const DHCP6DelegatedPrefix *p, struct siphash *state) {
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assert(p);
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siphash24_compress(&p->pd_prefix, sizeof(p->pd_prefix), state);
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siphash24_compress(&p->link, sizeof(p->link), state);
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}
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static int dhcp6_pd_compare_func(const DHCP6DelegatedPrefix *a, const DHCP6DelegatedPrefix *b) {
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int r;
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r = memcmp(&a->pd_prefix, &b->pd_prefix, sizeof(a->pd_prefix));
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if (r != 0)
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return r;
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return CMP(a->link, b->link);
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}
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DEFINE_HASH_OPS(dhcp6_pd_hash_ops, DHCP6DelegatedPrefix, dhcp6_pd_hash_func, dhcp6_pd_compare_func);
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static Link *dhcp6_pd_get_link_by_prefix(Link *link, const union in_addr_union *prefix) {
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DHCP6DelegatedPrefix *pd;
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assert(link);
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assert(link->manager);
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assert(prefix);
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pd = hashmap_get(link->manager->dhcp6_prefixes, &prefix->in6);
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if (!pd)
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return NULL;
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return pd->link;
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}
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static int dhcp6_pd_get_assigned_prefix(Link *link, const union in_addr_union *pd_prefix, union in_addr_union *ret_prefix) {
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DHCP6DelegatedPrefix *pd, in;
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assert(link);
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assert(link->manager);
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assert(pd_prefix);
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assert(ret_prefix);
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in = (DHCP6DelegatedPrefix) {
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.pd_prefix = pd_prefix->in6,
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.link = link,
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};
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pd = set_get(link->manager->dhcp6_pd_prefixes, &in);
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if (!pd)
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return -ENOENT;
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ret_prefix->in6 = pd->prefix;
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return 0;
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}
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static int dhcp6_pd_remove_old(Link *link, bool force);
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static int dhcp6_pd_address_callback(Address *address) {
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Address *a;
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assert(address);
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assert(address->link);
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/* Make this called only once */
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SET_FOREACH(a, address->link->dhcp6_pd_addresses)
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a->callback = NULL;
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return dhcp6_pd_remove_old(address->link, true);
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}
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static int dhcp6_pd_remove_old(Link *link, bool force) {
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Address *address;
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Route *route;
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int k, r = 0;
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assert(link);
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assert(link->manager);
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if (!force && (link->dhcp6_pd_address_messages != 0 || link->dhcp6_pd_route_configured != 0))
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return 0;
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if (set_isempty(link->dhcp6_pd_addresses_old) && set_isempty(link->dhcp6_pd_routes_old))
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return 0;
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if (!force) {
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bool set_callback = !set_isempty(link->dhcp6_pd_addresses);
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SET_FOREACH(address, link->dhcp6_pd_addresses)
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if (address_is_ready(address)) {
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set_callback = false;
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break;
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}
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if (set_callback) {
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SET_FOREACH(address, link->dhcp6_pd_addresses)
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address->callback = dhcp6_pd_address_callback;
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return 0;
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}
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}
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log_link_debug(link, "Removing old DHCPv6 Prefix Delegation addresses and routes.");
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link_dirty(link);
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SET_FOREACH(route, link->dhcp6_pd_routes_old) {
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k = route_remove(route, NULL, link, NULL);
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if (k < 0)
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r = k;
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if (link->radv)
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(void) sd_radv_remove_prefix(link->radv, &route->dst.in6, 64);
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dhcp6_pd_free(hashmap_get(link->manager->dhcp6_prefixes, &route->dst.in6));
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}
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SET_FOREACH(address, link->dhcp6_pd_addresses_old) {
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k = address_remove(address, link, NULL);
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if (k < 0)
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r = k;
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}
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return r;
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}
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int dhcp6_pd_remove(Link *link) {
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Address *address;
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Route *route;
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int k, r = 0;
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assert(link);
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assert(link->manager);
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if (!link_dhcp6_pd_is_enabled(link))
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return 0;
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link->dhcp6_pd_address_configured = false;
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link->dhcp6_pd_route_configured = false;
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k = dhcp6_pd_remove_old(link, true);
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if (k < 0)
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r = k;
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if (set_isempty(link->dhcp6_pd_addresses) && set_isempty(link->dhcp6_pd_routes))
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return r;
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log_link_debug(link, "Removing DHCPv6 Prefix Delegation addresses and routes.");
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link_dirty(link);
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SET_FOREACH(route, link->dhcp6_pd_routes) {
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k = route_remove(route, NULL, link, NULL);
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if (k < 0)
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r = k;
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if (link->radv)
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(void) sd_radv_remove_prefix(link->radv, &route->dst.in6, 64);
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dhcp6_pd_free(hashmap_get(link->manager->dhcp6_prefixes, &route->dst.in6));
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}
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SET_FOREACH(address, link->dhcp6_pd_addresses) {
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k = address_remove(address, link, NULL);
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if (k < 0)
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r = k;
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}
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return r;
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}
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static int dhcp6_pd_route_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
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int r;
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assert(link);
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assert(link->dhcp6_pd_route_messages > 0);
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link->dhcp6_pd_route_messages--;
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 1;
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_link_message_warning_errno(link, m, r, "Failed to add DHCPv6 Prefix Delegation route");
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link_enter_failed(link);
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return 1;
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}
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if (link->dhcp6_pd_route_messages == 0) {
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log_link_debug(link, "DHCPv6 prefix delegation routes set");
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if (link->dhcp6_pd_prefixes_assigned)
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link->dhcp6_pd_route_configured = true;
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r = dhcp6_pd_remove_old(link, false);
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if (r < 0) {
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link_enter_failed(link);
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return 1;
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}
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link_check_ready(link);
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}
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return 1;
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}
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static int dhcp6_set_pd_route(Link *link, const union in_addr_union *prefix, const union in_addr_union *pd_prefix) {
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_cleanup_(dhcp6_pd_freep) DHCP6DelegatedPrefix *pd = NULL;
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_cleanup_(route_freep) Route *route = NULL;
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Link *assigned_link;
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Route *ret;
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int r;
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assert(link);
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assert(link->manager);
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assert(prefix);
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assert(pd_prefix);
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r = route_new(&route);
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if (r < 0)
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return r;
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route->family = AF_INET6;
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route->dst = *prefix;
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route->dst_prefixlen = 64;
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route->protocol = RTPROT_DHCP;
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r = route_configure(route, link, dhcp6_pd_route_handler, &ret);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to set DHCPv6 prefix route: %m");
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link->dhcp6_pd_route_messages++;
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r = set_ensure_put(&link->dhcp6_pd_routes, &route_hash_ops, ret);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to store DHCPv6 prefix route: %m");
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(void) set_remove(link->dhcp6_pd_routes_old, ret);
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assigned_link = dhcp6_pd_get_link_by_prefix(link, prefix);
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if (assigned_link) {
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assert(assigned_link == link);
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return 0;
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}
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pd = new(DHCP6DelegatedPrefix, 1);
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if (!pd)
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return log_oom();
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*pd = (DHCP6DelegatedPrefix) {
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.prefix = prefix->in6,
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.pd_prefix = pd_prefix->in6,
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.link = link_ref(link),
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};
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r = hashmap_ensure_allocated(&link->manager->dhcp6_prefixes, &in6_addr_hash_ops);
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if (r < 0)
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return log_oom();
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r = hashmap_put(link->manager->dhcp6_prefixes, &pd->prefix, pd);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to store DHCPv6 prefix route at manager: %m");
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r = set_ensure_put(&link->manager->dhcp6_pd_prefixes, &dhcp6_pd_hash_ops, pd);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to store DHCPv6 prefix route at manager: %m");
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TAKE_PTR(pd);
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return 0;
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}
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static int dhcp6_pd_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert(link);
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assert(link->dhcp6_pd_address_messages > 0);
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link->dhcp6_pd_address_messages--;
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 1;
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_link_message_warning_errno(link, m, r, "Could not set DHCPv6 delegated prefix address");
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link_enter_failed(link);
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return 1;
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} else if (r >= 0)
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(void) manager_rtnl_process_address(rtnl, m, link->manager);
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if (link->dhcp6_pd_address_messages == 0) {
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log_link_debug(link, "DHCPv6 delegated prefix addresses set");
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if (link->dhcp6_pd_prefixes_assigned)
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link->dhcp6_pd_address_configured = true;
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r = dhcp6_pd_remove_old(link, false);
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if (r < 0) {
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link_enter_failed(link);
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return 1;
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}
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r = link_set_routes(link);
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if (r < 0) {
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link_enter_failed(link);
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return 1;
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}
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}
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return 1;
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}
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static int dhcp6_set_pd_address(Link *link,
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const union in_addr_union *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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_cleanup_(address_freep) Address *address = NULL;
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Address *ret;
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int r;
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assert(link);
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assert(link->network);
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assert(prefix);
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if (!link->network->dhcp6_pd_assign)
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return 0;
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r = address_new(&address);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to allocate address for DHCPv6 delegated prefix: %m");
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address->in_addr = *prefix;
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if (!in_addr_is_null(AF_INET6, &link->network->dhcp6_pd_token))
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memcpy(address->in_addr.in6.s6_addr + 8, link->network->dhcp6_pd_token.in6.s6_addr + 8, 8);
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else {
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r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
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if (r < 0)
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return log_link_warning_errno(link, r, "Failed to generate EUI64 address for acquired DHCPv6 delegated prefix: %m");
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}
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address->prefixlen = prefix_len;
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address->family = AF_INET6;
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address->cinfo.ifa_prefered = lifetime_preferred;
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address->cinfo.ifa_valid = lifetime_valid;
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r = address_configure(address, link, dhcp6_pd_address_handler, true, &ret);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to set DHCPv6 delegated prefix address: %m");
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link->dhcp6_pd_address_messages++;
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r = set_ensure_put(&link->dhcp6_pd_addresses, &address_hash_ops, ret);
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to store DHCPv6 delegated prefix address: %m");
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(void) set_remove(link->dhcp6_pd_addresses_old, ret);
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return 0;
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}
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static int dhcp6_pd_assign_prefix(Link *link, const union in_addr_union *prefix, const union in_addr_union *pd_prefix,
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uint8_t prefix_len, uint32_t lifetime_preferred, uint32_t lifetime_valid) {
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int r;
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assert(link);
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assert(link->network);
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assert(prefix);
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if (link->network->dhcp6_pd_announce) {
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r = radv_add_prefix(link, &prefix->in6, prefix_len, lifetime_preferred, lifetime_valid);
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if (r < 0)
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return r;
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}
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r = dhcp6_set_pd_route(link, prefix, pd_prefix);
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if (r < 0)
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return r;
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r = dhcp6_set_pd_address(link, prefix, prefix_len, lifetime_preferred, lifetime_valid);
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if (r < 0)
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return r;
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return 0;
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}
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static bool link_has_preferred_subnet_id(Link *link) {
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if (!link->network)
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return false;
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return link->network->dhcp6_pd_subnet_id >= 0;
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}
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static int dhcp6_get_preferred_delegated_prefix(
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Link *link,
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const union in_addr_union *masked_pd_prefix,
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uint8_t pd_prefix_len,
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union in_addr_union *ret) {
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/* We start off with the original PD prefix we have been assigned and iterate from there */
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union in_addr_union prefix;
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uint64_t n_prefixes;
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Link *assigned_link;
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int r;
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assert(link);
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assert(link->manager);
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assert(masked_pd_prefix);
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assert(pd_prefix_len <= 64);
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n_prefixes = UINT64_C(1) << (64 - pd_prefix_len);
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prefix = *masked_pd_prefix;
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if (link_has_preferred_subnet_id(link)) {
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uint64_t subnet_id = link->network->dhcp6_pd_subnet_id;
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/* If the link has a preference for a particular subnet id try to allocate that */
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if (subnet_id >= n_prefixes)
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return log_link_warning_errno(link, SYNTHETIC_ERRNO(ERANGE),
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"subnet id %" PRIu64 " is out of range. Only have %" PRIu64 " subnets.",
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subnet_id, n_prefixes);
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r = in_addr_prefix_nth(AF_INET6, &prefix, 64, subnet_id);
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if (r < 0)
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return log_link_warning_errno(link, r,
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"subnet id %" PRIu64 " is out of range. Only have %" PRIu64 " subnets.",
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subnet_id, n_prefixes);
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/* Verify that the prefix we did calculate fits in the pd prefix.
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* This should not fail as we checked the prefix size beforehand */
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assert_se(in_addr_prefix_covers(AF_INET6, masked_pd_prefix, pd_prefix_len, &prefix) > 0);
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assigned_link = dhcp6_pd_get_link_by_prefix(link, &prefix);
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if (assigned_link && assigned_link != link) {
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_cleanup_free_ char *assigned_buf = NULL;
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(void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf);
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return log_link_warning_errno(link, SYNTHETIC_ERRNO(EAGAIN),
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"The requested prefix %s is already assigned to another link.",
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strna(assigned_buf));
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}
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*ret = prefix;
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return 0;
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}
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|
|
for (uint64_t n = 0; n < n_prefixes; n++) {
|
|
/* If we do not have an allocation preference just iterate
|
|
* through the address space and return the first free prefix. */
|
|
assigned_link = dhcp6_pd_get_link_by_prefix(link, &prefix);
|
|
if (!assigned_link || assigned_link == link) {
|
|
*ret = prefix;
|
|
return 0;
|
|
}
|
|
|
|
r = in_addr_prefix_next(AF_INET6, &prefix, 64);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Can't allocate another prefix. Out of address space?: %m");
|
|
}
|
|
|
|
return log_link_warning_errno(link, SYNTHETIC_ERRNO(ERANGE), "Couldn't find a suitable prefix. Ran out of address space.");
|
|
}
|
|
|
|
static void dhcp6_pd_prefix_distribute(Link *dhcp6_link,
|
|
const union in_addr_union *masked_pd_prefix,
|
|
uint8_t pd_prefix_len,
|
|
uint32_t lifetime_preferred,
|
|
uint32_t lifetime_valid,
|
|
bool assign_preferred_subnet_id) {
|
|
|
|
Link *link;
|
|
int r;
|
|
|
|
assert(dhcp6_link);
|
|
assert(dhcp6_link->manager);
|
|
assert(masked_pd_prefix);
|
|
assert(pd_prefix_len <= 64);
|
|
|
|
HASHMAP_FOREACH(link, dhcp6_link->manager->links) {
|
|
_cleanup_free_ char *assigned_buf = NULL;
|
|
union in_addr_union assigned_prefix;
|
|
|
|
if (link == dhcp6_link)
|
|
continue;
|
|
|
|
if (!link_dhcp6_pd_is_enabled(link))
|
|
continue;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
continue;
|
|
|
|
if (assign_preferred_subnet_id != link_has_preferred_subnet_id(link))
|
|
continue;
|
|
|
|
r = dhcp6_pd_get_assigned_prefix(link, masked_pd_prefix, &assigned_prefix);
|
|
if (r < 0) {
|
|
r = dhcp6_get_preferred_delegated_prefix(link, masked_pd_prefix, pd_prefix_len, &assigned_prefix);
|
|
if (r < 0) {
|
|
link->dhcp6_pd_prefixes_assigned = false;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
(void) in_addr_to_string(AF_INET6, &assigned_prefix, &assigned_buf);
|
|
r = dhcp6_pd_assign_prefix(link, &assigned_prefix, masked_pd_prefix, 64,
|
|
lifetime_preferred, lifetime_valid);
|
|
if (r < 0) {
|
|
log_link_error_errno(link, r, "Unable to assign/update prefix %s/64: %m",
|
|
strna(assigned_buf));
|
|
link_enter_failed(link);
|
|
} else
|
|
log_link_debug(link, "Assigned prefix %s/64", strna(assigned_buf));
|
|
}
|
|
}
|
|
|
|
static int dhcp6_pd_prepare(Link *link) {
|
|
Address *address;
|
|
Route *route;
|
|
int r;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 0;
|
|
|
|
if (!link_dhcp6_pd_is_enabled(link))
|
|
return 0;
|
|
|
|
link_dirty(link);
|
|
|
|
link->dhcp6_pd_address_configured = false;
|
|
link->dhcp6_pd_route_configured = false;
|
|
link->dhcp6_pd_prefixes_assigned = true;
|
|
|
|
while ((address = set_steal_first(link->dhcp6_pd_addresses))) {
|
|
r = set_ensure_put(&link->dhcp6_pd_addresses_old, &address_hash_ops, address);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to store old DHCPv6 Prefix Delegation address: %m");
|
|
}
|
|
|
|
while ((route = set_steal_first(link->dhcp6_pd_routes))) {
|
|
r = set_ensure_put(&link->dhcp6_pd_routes_old, &route_hash_ops, route);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to store old DHCPv6 Prefix Delegation route: %m");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_pd_finalize(Link *link) {
|
|
int r;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 0;
|
|
|
|
if (!link_dhcp6_pd_is_enabled(link))
|
|
return 0;
|
|
|
|
if (link->dhcp6_pd_address_messages == 0) {
|
|
if (link->dhcp6_pd_prefixes_assigned)
|
|
link->dhcp6_pd_address_configured = true;
|
|
} else {
|
|
log_link_debug(link, "Setting DHCPv6 PD addresses");
|
|
/* address_handler calls link_set_routes() and link_set_nexthop(). Before they are
|
|
* called, the related flags must be cleared. Otherwise, the link becomes configured
|
|
* state before routes are configured. */
|
|
link->static_routes_configured = false;
|
|
link->static_nexthops_configured = false;
|
|
}
|
|
|
|
if (link->dhcp6_pd_route_messages == 0) {
|
|
if (link->dhcp6_pd_prefixes_assigned)
|
|
link->dhcp6_pd_route_configured = true;
|
|
} else
|
|
log_link_debug(link, "Setting DHCPv6 PD routes");
|
|
|
|
r = dhcp6_pd_remove_old(link, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured)
|
|
link_check_ready(link);
|
|
else
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dhcp6_pd_prefix_lost(Link *dhcp6_link) {
|
|
Link *link;
|
|
int r;
|
|
|
|
assert(dhcp6_link);
|
|
assert(dhcp6_link->manager);
|
|
|
|
HASHMAP_FOREACH(link, dhcp6_link->manager->links) {
|
|
if (link == dhcp6_link)
|
|
continue;
|
|
|
|
r = dhcp6_pd_remove(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
}
|
|
}
|
|
|
|
static int dhcp6_remove_old(Link *link, bool force);
|
|
|
|
static int dhcp6_address_callback(Address *address) {
|
|
Address *a;
|
|
|
|
assert(address);
|
|
assert(address->link);
|
|
|
|
/* Make this called only once */
|
|
SET_FOREACH(a, address->link->dhcp6_addresses)
|
|
a->callback = NULL;
|
|
|
|
return dhcp6_remove_old(address->link, true);
|
|
}
|
|
|
|
static int dhcp6_remove_old(Link *link, bool force) {
|
|
Address *address;
|
|
Route *route;
|
|
int k, r = 0;
|
|
|
|
assert(link);
|
|
|
|
if (!force && (!link->dhcp6_address_configured || !link->dhcp6_route_configured))
|
|
return 0;
|
|
|
|
if (set_isempty(link->dhcp6_addresses_old) && set_isempty(link->dhcp6_routes_old))
|
|
return 0;
|
|
|
|
if (!force) {
|
|
bool set_callback = !set_isempty(link->dhcp6_addresses);
|
|
|
|
SET_FOREACH(address, link->dhcp6_addresses)
|
|
if (address_is_ready(address)) {
|
|
set_callback = false;
|
|
break;
|
|
}
|
|
|
|
if (set_callback) {
|
|
SET_FOREACH(address, link->dhcp6_addresses)
|
|
address->callback = dhcp6_address_callback;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
log_link_debug(link, "Removing old DHCPv6 addresses and routes.");
|
|
|
|
link_dirty(link);
|
|
|
|
SET_FOREACH(route, link->dhcp6_routes_old) {
|
|
k = route_remove(route, NULL, link, NULL);
|
|
if (k < 0)
|
|
r = k;
|
|
}
|
|
|
|
SET_FOREACH(address, link->dhcp6_addresses_old) {
|
|
k = address_remove(address, link, NULL);
|
|
if (k < 0)
|
|
r = k;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int dhcp6_remove(Link *link) {
|
|
Address *address;
|
|
Route *route;
|
|
int k, r = 0;
|
|
|
|
assert(link);
|
|
|
|
link->dhcp6_address_configured = false;
|
|
link->dhcp6_route_configured = false;
|
|
|
|
k = dhcp6_remove_old(link, true);
|
|
if (k < 0)
|
|
r = k;
|
|
|
|
if (set_isempty(link->dhcp6_addresses) && set_isempty(link->dhcp6_routes))
|
|
return r;
|
|
|
|
log_link_debug(link, "Removing DHCPv6 addresses and routes.");
|
|
|
|
link_dirty(link);
|
|
|
|
SET_FOREACH(route, link->dhcp6_routes) {
|
|
k = route_remove(route, NULL, link, NULL);
|
|
if (k < 0)
|
|
r = k;
|
|
}
|
|
|
|
SET_FOREACH(address, link->dhcp6_addresses) {
|
|
k = address_remove(address, link, NULL);
|
|
if (k < 0)
|
|
r = k;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int dhcp6_route_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->dhcp6_route_messages > 0);
|
|
|
|
link->dhcp6_route_messages--;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0 && r != -EEXIST) {
|
|
log_link_message_warning_errno(link, m, r, "Failed to add unreachable route for DHCPv6 delegated subnet");
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
|
|
if (link->dhcp6_route_messages == 0) {
|
|
log_link_debug(link, "Unreachable routes for DHCPv6 delegated subnets set");
|
|
link->dhcp6_route_configured = true;
|
|
|
|
r = dhcp6_remove_old(link, false);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
|
|
link_check_ready(link);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int dhcp6_set_unreachable_route(Link *link, const union in_addr_union *addr, uint8_t prefixlen) {
|
|
_cleanup_(route_freep) Route *route = NULL;
|
|
_cleanup_free_ char *buf = NULL;
|
|
Route *ret;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(addr);
|
|
|
|
(void) in_addr_to_string(AF_INET6, addr, &buf);
|
|
|
|
if (prefixlen > 64) {
|
|
log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u",
|
|
strna(buf), prefixlen);
|
|
return 0;
|
|
}
|
|
|
|
if (prefixlen == 64) {
|
|
log_link_debug(link, "Not adding a blocking route for DHCPv6 delegated subnet %s/64 since distributed prefix is 64",
|
|
strna(buf));
|
|
return 1;
|
|
}
|
|
|
|
if (prefixlen < 48)
|
|
log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u",
|
|
strna(buf), prefixlen);
|
|
|
|
r = route_new(&route);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
route->family = AF_INET6;
|
|
route->dst = *addr;
|
|
route->dst_prefixlen = prefixlen;
|
|
route->table = link_get_dhcp_route_table(link);
|
|
route->type = RTN_UNREACHABLE;
|
|
route->protocol = RTPROT_DHCP;
|
|
|
|
r = route_configure(route, link, dhcp6_route_handler, &ret);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to set unreachable route for DHCPv6 delegated subnet %s/%u: %m",
|
|
strna(buf), prefixlen);
|
|
|
|
link->dhcp6_route_messages++;
|
|
|
|
r = set_ensure_put(&link->dhcp6_routes, &route_hash_ops, ret);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to store unreachable route for DHCPv6 delegated subnet %s/%u: %m",
|
|
strna(buf), prefixlen);
|
|
|
|
(void) set_remove(link->dhcp6_routes_old, ret);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int dhcp6_pd_prefix_acquired(Link *dhcp6_link) {
|
|
Link *link;
|
|
int r;
|
|
|
|
assert(dhcp6_link);
|
|
assert(dhcp6_link->dhcp6_lease);
|
|
|
|
HASHMAP_FOREACH(link, dhcp6_link->manager->links) {
|
|
if (link == dhcp6_link)
|
|
continue;
|
|
|
|
r = dhcp6_pd_prepare(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
}
|
|
|
|
for (sd_dhcp6_lease_reset_pd_prefix_iter(dhcp6_link->dhcp6_lease);;) {
|
|
uint32_t lifetime_preferred, lifetime_valid;
|
|
union in_addr_union pd_prefix, prefix;
|
|
uint8_t pd_prefix_len;
|
|
|
|
r = sd_dhcp6_lease_get_pd(dhcp6_link->dhcp6_lease, &pd_prefix.in6, &pd_prefix_len,
|
|
&lifetime_preferred, &lifetime_valid);
|
|
if (r < 0)
|
|
break;
|
|
|
|
r = dhcp6_set_unreachable_route(dhcp6_link, &pd_prefix, pd_prefix_len);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
continue;
|
|
|
|
/* We are doing prefix allocation in two steps:
|
|
* 1. all those links that have a preferred subnet id will be assigned their subnet
|
|
* 2. all those links that remain will receive prefixes in sequential order. Prefixes
|
|
* that were previously already allocated to another link will be skipped.
|
|
* The assignment has to be split in two phases since subnet id
|
|
* preferences should be honored. Meaning that any subnet id should be
|
|
* handed out to the requesting link and not to some link that didn't
|
|
* specify any preference. */
|
|
|
|
assert(pd_prefix_len <= 64);
|
|
|
|
prefix = pd_prefix;
|
|
r = in_addr_mask(AF_INET6, &prefix, pd_prefix_len);
|
|
if (r < 0)
|
|
return log_link_error_errno(dhcp6_link, r, "Failed to mask DHCPv6 PD prefix: %m");
|
|
|
|
if (DEBUG_LOGGING) {
|
|
uint64_t n_prefixes = UINT64_C(1) << (64 - pd_prefix_len);
|
|
_cleanup_free_ char *buf = NULL;
|
|
|
|
(void) in_addr_to_string(AF_INET6, &prefix, &buf);
|
|
log_link_debug(dhcp6_link, "Assigning up to %" PRIu64 " prefixes from %s/%u",
|
|
n_prefixes, strna(buf), pd_prefix_len);
|
|
}
|
|
|
|
dhcp6_pd_prefix_distribute(dhcp6_link,
|
|
&prefix,
|
|
pd_prefix_len,
|
|
lifetime_preferred,
|
|
lifetime_valid,
|
|
true);
|
|
|
|
dhcp6_pd_prefix_distribute(dhcp6_link,
|
|
&prefix,
|
|
pd_prefix_len,
|
|
lifetime_preferred,
|
|
lifetime_valid,
|
|
false);
|
|
}
|
|
|
|
HASHMAP_FOREACH(link, dhcp6_link->manager->links) {
|
|
if (link == dhcp6_link)
|
|
continue;
|
|
|
|
r = dhcp6_pd_finalize(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->dhcp6_address_messages > 0);
|
|
|
|
link->dhcp6_address_messages--;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0 && r != -EEXIST) {
|
|
log_link_message_warning_errno(link, m, r, "Could not set DHCPv6 address");
|
|
link_enter_failed(link);
|
|
return 1;
|
|
} else if (r >= 0)
|
|
(void) manager_rtnl_process_address(rtnl, m, link->manager);
|
|
|
|
if (link->dhcp6_address_messages == 0) {
|
|
log_link_debug(link, "DHCPv6 addresses set");
|
|
link->dhcp6_address_configured = true;
|
|
|
|
r = dhcp6_remove_old(link, false);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
|
|
r = link_set_routes(link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int dhcp6_update_address(
|
|
Link *link,
|
|
const struct in6_addr *ip6_addr,
|
|
uint32_t lifetime_preferred,
|
|
uint32_t lifetime_valid) {
|
|
|
|
_cleanup_(address_freep) Address *addr = NULL;
|
|
_cleanup_free_ char *buffer = NULL;
|
|
Address *ret;
|
|
int r;
|
|
|
|
r = address_new(&addr);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
addr->family = AF_INET6;
|
|
addr->in_addr.in6 = *ip6_addr;
|
|
addr->flags = IFA_F_NOPREFIXROUTE;
|
|
addr->prefixlen = 128;
|
|
addr->cinfo.ifa_prefered = lifetime_preferred;
|
|
addr->cinfo.ifa_valid = lifetime_valid;
|
|
|
|
(void) in_addr_to_string(addr->family, &addr->in_addr, &buffer);
|
|
log_link_full(link, set_contains(link->dhcp6_addresses, addr) ? LOG_DEBUG : LOG_INFO,
|
|
"DHCPv6 address %s/%u timeout preferred %d valid %d",
|
|
strna(buffer), addr->prefixlen, lifetime_preferred, lifetime_valid);
|
|
|
|
r = address_configure(addr, link, dhcp6_address_handler, true, &ret);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to set DHCPv6 address %s/%u: %m",
|
|
strna(buffer), addr->prefixlen);
|
|
|
|
link->dhcp6_address_messages++;
|
|
|
|
r = set_ensure_put(&link->dhcp6_addresses, &address_hash_ops, ret);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to store DHCPv6 address %s/%u: %m",
|
|
strna(buffer), addr->prefixlen);
|
|
|
|
(void) set_remove(link->dhcp6_addresses_old, ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_address_acquired(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->dhcp6_lease);
|
|
|
|
for (sd_dhcp6_lease_reset_address_iter(link->dhcp6_lease);;) {
|
|
uint32_t lifetime_preferred, lifetime_valid;
|
|
struct in6_addr ip6_addr;
|
|
|
|
r = sd_dhcp6_lease_get_address(link->dhcp6_lease, &ip6_addr, &lifetime_preferred, &lifetime_valid);
|
|
if (r < 0)
|
|
break;
|
|
|
|
r = dhcp6_update_address(link, &ip6_addr, lifetime_preferred, lifetime_valid);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_lease_ip_acquired(sd_dhcp6_client *client, Link *link) {
|
|
_cleanup_(sd_dhcp6_lease_unrefp) sd_dhcp6_lease *lease_old = NULL;
|
|
sd_dhcp6_lease *lease;
|
|
Address *a;
|
|
Route *rt;
|
|
int r;
|
|
|
|
link->dhcp6_address_configured = false;
|
|
link->dhcp6_route_configured = false;
|
|
|
|
link_dirty(link);
|
|
|
|
while ((a = set_steal_first(link->dhcp6_addresses))) {
|
|
r = set_ensure_put(&link->dhcp6_addresses_old, &address_hash_ops, a);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to store old DHCPv6 address: %m");
|
|
}
|
|
|
|
while ((rt = set_steal_first(link->dhcp6_routes))) {
|
|
r = set_ensure_put(&link->dhcp6_routes_old, &route_hash_ops, rt);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to store old DHCPv6 route: %m");
|
|
}
|
|
|
|
r = sd_dhcp6_client_get_lease(client, &lease);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to get DHCPv6 lease: %m");
|
|
|
|
lease_old = TAKE_PTR(link->dhcp6_lease);
|
|
link->dhcp6_lease = sd_dhcp6_lease_ref(lease);
|
|
|
|
r = dhcp6_address_acquired(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (dhcp6_lease_has_pd_prefix(lease)) {
|
|
r = dhcp6_pd_prefix_acquired(link);
|
|
if (r < 0)
|
|
return r;
|
|
} else if (dhcp6_lease_has_pd_prefix(lease_old))
|
|
/* When we had PD prefixes but not now, we need to remove them. */
|
|
dhcp6_pd_prefix_lost(link);
|
|
|
|
if (link->dhcp6_address_messages == 0)
|
|
link->dhcp6_address_configured = true;
|
|
else {
|
|
log_link_debug(link, "Setting DHCPv6 addresses");
|
|
/* address_handler calls link_set_routes() and link_set_nexthop(). Before they are
|
|
* called, the related flags must be cleared. Otherwise, the link becomes configured
|
|
* state before routes are configured. */
|
|
link->static_routes_configured = false;
|
|
link->static_nexthops_configured = false;
|
|
}
|
|
|
|
if (link->dhcp6_route_messages == 0)
|
|
link->dhcp6_route_configured = true;
|
|
else
|
|
log_link_debug(link, "Setting unreachable routes for DHCPv6 delegated subnets");
|
|
|
|
r = dhcp6_remove_old(link, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (link->dhcp6_address_configured && link->dhcp6_route_configured)
|
|
link_check_ready(link);
|
|
else
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_lease_information_acquired(sd_dhcp6_client *client, Link *link) {
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_lease_lost(Link *link) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
|
|
log_link_info(link, "DHCPv6 lease lost");
|
|
|
|
if (dhcp6_lease_has_pd_prefix(link->dhcp6_lease))
|
|
dhcp6_pd_prefix_lost(link);
|
|
|
|
link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
|
|
|
|
r = dhcp6_remove(link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
|
|
Link *link = userdata;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return;
|
|
|
|
switch (event) {
|
|
case SD_DHCP6_CLIENT_EVENT_STOP:
|
|
case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
|
|
case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
|
|
r = dhcp6_lease_lost(link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
break;
|
|
|
|
case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
|
|
r = dhcp6_lease_ip_acquired(client, link);
|
|
if (r < 0) {
|
|
link_enter_failed(link);
|
|
return;
|
|
}
|
|
|
|
_fallthrough_;
|
|
case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
|
|
r = dhcp6_lease_information_acquired(client, link);
|
|
if (r < 0)
|
|
link_enter_failed(link);
|
|
break;
|
|
|
|
default:
|
|
if (event < 0)
|
|
log_link_warning_errno(link, event, "DHCPv6 error: %m");
|
|
else
|
|
log_link_warning(link, "DHCPv6 unknown event: %d", event);
|
|
return;
|
|
}
|
|
}
|
|
|
|
int dhcp6_request_address(Link *link, int ir) {
|
|
int r, inf_req, pd;
|
|
bool running;
|
|
|
|
assert(link);
|
|
assert(link->dhcp6_client);
|
|
assert(link->network);
|
|
assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address) > 0);
|
|
|
|
r = sd_dhcp6_client_is_running(link->dhcp6_client);
|
|
if (r < 0)
|
|
return r;
|
|
running = r;
|
|
|
|
r = sd_dhcp6_client_get_prefix_delegation(link->dhcp6_client, &pd);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (pd && ir && link->network->dhcp6_force_pd_other_information) {
|
|
log_link_debug(link, "Enabling managed mode to request DHCPv6 PD with 'Other Information' set");
|
|
|
|
r = sd_dhcp6_client_set_address_request(link->dhcp6_client, false);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
ir = false;
|
|
}
|
|
|
|
if (running) {
|
|
r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (inf_req == ir)
|
|
return 0;
|
|
|
|
r = sd_dhcp6_client_stop(link->dhcp6_client);
|
|
if (r < 0)
|
|
return r;
|
|
} else {
|
|
r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_dhcp6_client_set_information_request(link->dhcp6_client, ir);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_dhcp6_client_start(link->dhcp6_client);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dhcp6_request_prefix_delegation(Link *link) {
|
|
Link *l;
|
|
|
|
assert(link);
|
|
assert(link->manager);
|
|
|
|
if (!link_dhcp6_pd_is_enabled(link))
|
|
return 0;
|
|
|
|
log_link_debug(link, "Requesting DHCPv6 prefixes to be delegated for new link");
|
|
|
|
HASHMAP_FOREACH(l, link->manager->links) {
|
|
int r, enabled;
|
|
|
|
if (l == link)
|
|
continue;
|
|
|
|
if (!l->dhcp6_client)
|
|
continue;
|
|
|
|
r = sd_dhcp6_client_get_prefix_delegation(l->dhcp6_client, &enabled);
|
|
if (r < 0) {
|
|
log_link_warning_errno(l, r, "Cannot get prefix delegation when adding new link: %m");
|
|
link_enter_failed(l);
|
|
continue;
|
|
}
|
|
|
|
if (enabled == 0) {
|
|
r = sd_dhcp6_client_set_prefix_delegation(l->dhcp6_client, 1);
|
|
if (r < 0) {
|
|
log_link_warning_errno(l, r, "Cannot enable prefix delegation when adding new link: %m");
|
|
link_enter_failed(l);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
r = sd_dhcp6_client_is_running(l->dhcp6_client);
|
|
if (r <= 0)
|
|
continue;
|
|
|
|
if (enabled != 0) {
|
|
if (dhcp6_lease_has_pd_prefix(l->dhcp6_lease)) {
|
|
log_link_debug(l, "Requesting re-assignment of delegated prefixes after adding new link");
|
|
r = dhcp6_pd_prefix_acquired(l);
|
|
if (r < 0)
|
|
link_enter_failed(l);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
r = sd_dhcp6_client_stop(l->dhcp6_client);
|
|
if (r < 0) {
|
|
log_link_warning_errno(l, r, "Cannot stop DHCPv6 prefix delegation client after adding new link: %m");
|
|
link_enter_failed(l);
|
|
continue;
|
|
}
|
|
|
|
r = sd_dhcp6_client_start(l->dhcp6_client);
|
|
if (r < 0) {
|
|
log_link_warning_errno(l, r, "Cannot restart DHCPv6 prefix delegation client after adding new link: %m");
|
|
link_enter_failed(l);
|
|
continue;
|
|
}
|
|
|
|
log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link");
|
|
}
|
|
|
|
/* dhcp6_pd_prefix_acquired() may make the link in failed state. */
|
|
if (link->state == LINK_STATE_FAILED)
|
|
return -ENOANO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dhcp6_set_hostname(sd_dhcp6_client *client, Link *link) {
|
|
_cleanup_free_ char *hostname = NULL;
|
|
const char *hn;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (!link->network->dhcp_send_hostname)
|
|
hn = NULL;
|
|
else if (link->network->dhcp_hostname)
|
|
hn = link->network->dhcp_hostname;
|
|
else {
|
|
r = gethostname_strict(&hostname);
|
|
if (r < 0 && r != -ENXIO) /* ENXIO: no hostname set or hostname is "localhost" */
|
|
return r;
|
|
|
|
hn = hostname;
|
|
}
|
|
|
|
r = sd_dhcp6_client_set_fqdn(client, hn);
|
|
if (r == -EINVAL && hostname)
|
|
/* Ignore error when the machine's hostname is not suitable to send in DHCP packet. */
|
|
log_link_warning_errno(link, r, "DHCP6 CLIENT: Failed to set hostname from kernel hostname, ignoring: %m");
|
|
else if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set hostname: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) {
|
|
Link *link;
|
|
|
|
assert(dhcp6_link);
|
|
assert(dhcp6_link->manager);
|
|
|
|
HASHMAP_FOREACH(link, dhcp6_link->manager->links) {
|
|
if (link == dhcp6_link)
|
|
continue;
|
|
|
|
if (!link_dhcp6_pd_is_enabled(link))
|
|
continue;
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int dhcp6_set_identifier(Link *link, sd_dhcp6_client *client) {
|
|
const DUID *duid;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
assert(client);
|
|
|
|
r = sd_dhcp6_client_set_mac(client, link->hw_addr.addr.bytes, link->hw_addr.length, link->iftype);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (link->network->iaid_set) {
|
|
r = sd_dhcp6_client_set_iaid(client, link->network->iaid);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
duid = link_get_duid(link);
|
|
if (duid->type == DUID_TYPE_LLT && duid->raw_data_len == 0)
|
|
r = sd_dhcp6_client_set_duid_llt(client, duid->llt_time);
|
|
else
|
|
r = sd_dhcp6_client_set_duid(client,
|
|
duid->type,
|
|
duid->raw_data_len > 0 ? duid->raw_data : NULL,
|
|
duid->raw_data_len);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dhcp6_configure(Link *link) {
|
|
_cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
|
|
sd_dhcp6_option *vendor_option;
|
|
sd_dhcp6_option *send_option;
|
|
void *request_options;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (!link_dhcp6_enabled(link) && !link_ipv6_accept_ra_enabled(link))
|
|
return 0;
|
|
|
|
if (link->dhcp6_client)
|
|
return 0;
|
|
|
|
r = sd_dhcp6_client_new(&client);
|
|
if (r == -ENOMEM)
|
|
return log_oom();
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to create DHCP6 client: %m");
|
|
|
|
r = sd_dhcp6_client_attach_event(client, link->manager->event, 0);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to attach event: %m");
|
|
|
|
r = dhcp6_set_identifier(link, client);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set identifier: %m");
|
|
|
|
ORDERED_HASHMAP_FOREACH(send_option, link->network->dhcp6_client_send_options) {
|
|
r = sd_dhcp6_client_add_option(client, send_option);
|
|
if (r == -EEXIST)
|
|
continue;
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set option: %m");
|
|
}
|
|
|
|
r = dhcp6_set_hostname(client, link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_dhcp6_client_set_ifindex(client, link->ifindex);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set ifindex: %m");
|
|
|
|
if (link->network->dhcp6_rapid_commit) {
|
|
r = sd_dhcp6_client_set_request_option(client, SD_DHCP6_OPTION_RAPID_COMMIT);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set request flag for rapid commit: %m");
|
|
}
|
|
|
|
if (link->network->dhcp6_mudurl) {
|
|
r = sd_dhcp6_client_set_request_mud_url(client, link->network->dhcp6_mudurl);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set MUD URL: %m");
|
|
}
|
|
|
|
SET_FOREACH(request_options, link->network->dhcp6_request_options) {
|
|
uint32_t option = PTR_TO_UINT32(request_options);
|
|
|
|
r = sd_dhcp6_client_set_request_option(client, option);
|
|
if (r == -EEXIST) {
|
|
log_link_debug(link, "DHCP6 CLIENT: Failed to set request flag for '%u' already exists, ignoring.", option);
|
|
continue;
|
|
}
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set request flag for '%u': %m", option);
|
|
}
|
|
|
|
if (link->network->dhcp6_user_class) {
|
|
r = sd_dhcp6_client_set_request_user_class(client, link->network->dhcp6_user_class);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set user class: %m");
|
|
}
|
|
|
|
if (link->network->dhcp6_vendor_class) {
|
|
r = sd_dhcp6_client_set_request_vendor_class(client, link->network->dhcp6_vendor_class);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set vendor class: %m");
|
|
}
|
|
|
|
ORDERED_HASHMAP_FOREACH(vendor_option, link->network->dhcp6_client_send_vendor_options) {
|
|
r = sd_dhcp6_client_add_vendor_option(client, vendor_option);
|
|
if (r == -EEXIST)
|
|
continue;
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set vendor option: %m");
|
|
}
|
|
|
|
r = sd_dhcp6_client_set_callback(client, dhcp6_handler, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set callback: %m");
|
|
|
|
if (dhcp6_enable_prefix_delegation(link)) {
|
|
r = sd_dhcp6_client_set_prefix_delegation(client, true);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set prefix delegation: %m");
|
|
}
|
|
|
|
if (link->network->dhcp6_pd_length > 0) {
|
|
r = sd_dhcp6_client_set_prefix_delegation_hint(client, link->network->dhcp6_pd_length, &link->network->dhcp6_pd_address);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set prefix hint: %m");
|
|
}
|
|
|
|
link->dhcp6_client = TAKE_PTR(client);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int dhcp6_update_mac(Link *link) {
|
|
bool restart;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (!link->dhcp6_client)
|
|
return 0;
|
|
|
|
restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
|
|
|
|
if (restart) {
|
|
r = sd_dhcp6_client_stop(link->dhcp6_client);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = dhcp6_set_identifier(link, link->dhcp6_client);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (restart) {
|
|
r = sd_dhcp6_client_start(link->dhcp6_client);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int link_serialize_dhcp6_client(Link *link, FILE *f) {
|
|
_cleanup_free_ char *duid = NULL;
|
|
uint32_t iaid;
|
|
int r;
|
|
|
|
assert(link);
|
|
|
|
if (!link->dhcp6_client)
|
|
return 0;
|
|
|
|
r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
|
|
if (r >= 0)
|
|
fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
|
|
|
|
r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
|
|
if (r >= 0)
|
|
fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_dhcp6_pd_hint(
|
|
const char* unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Network *network = data;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = in_addr_prefix_from_string(rvalue, AF_INET6, (union in_addr_union *) &network->dhcp6_pd_address, &network->dhcp6_pd_length);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse PrefixDelegationHint=%s, ignoring assignment", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (network->dhcp6_pd_length < 1 || network->dhcp6_pd_length > 128) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid prefix length='%d', ignoring assignment", network->dhcp6_pd_length);
|
|
network->dhcp6_pd_length = 0;
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_dhcp6_mud_url(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
_cleanup_free_ char *unescaped = NULL;
|
|
Network *network = data;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
if (isempty(rvalue)) {
|
|
network->dhcp6_mudurl = mfree(network->dhcp6_mudurl);
|
|
return 0;
|
|
}
|
|
|
|
r = cunescape(rvalue, 0, &unescaped);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Failed to Failed to unescape MUD URL, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (!http_url_is_valid(unescaped) || strlen(unescaped) > UINT8_MAX) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"Failed to parse MUD URL '%s', ignoring: %m", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
return free_and_replace(network->dhcp6_mudurl, unescaped);
|
|
}
|
|
|
|
DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp6_client_start_mode, dhcp6_client_start_mode, DHCP6ClientStartMode,
|
|
"Failed to parse WithoutRA= setting");
|
|
|
|
static const char* const dhcp6_client_start_mode_table[_DHCP6_CLIENT_START_MODE_MAX] = {
|
|
[DHCP6_CLIENT_START_MODE_NO] = "no",
|
|
[DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST] = "information-request",
|
|
[DHCP6_CLIENT_START_MODE_SOLICIT] = "solicit",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(dhcp6_client_start_mode, DHCP6ClientStartMode);
|
|
|
|
int config_parse_dhcp6_pd_subnet_id(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
int64_t *p = data;
|
|
uint64_t t;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (isempty(rvalue) || streq(rvalue, "auto")) {
|
|
*p = -1;
|
|
return 0;
|
|
}
|
|
|
|
r = safe_atoux64(rvalue, &t);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Failed to parse %s=, ignoring assignment: %s",
|
|
lvalue, rvalue);
|
|
return 0;
|
|
}
|
|
if (t > INT64_MAX) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"Invalid subnet id '%s', ignoring assignment.",
|
|
rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*p = (int64_t) t;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_dhcp6_pd_token(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
union in_addr_union *addr = data, tmp;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (isempty(rvalue)) {
|
|
*addr = IN_ADDR_NULL;
|
|
return 0;
|
|
}
|
|
|
|
r = in_addr_from_string(AF_INET6, rvalue, &tmp);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Failed to parse DHCPv6 Prefix Delegation token, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (in_addr_is_null(AF_INET6, &tmp)) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"DHCPv6 Prefix Delegation token cannot be the ANY address, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
*addr = tmp;
|
|
|
|
return 0;
|
|
}
|