#include <netinet/in.h>
#include <linux/if.h>
#include <linux/if_arp.h>
-#include "sd-radv.h"
#include "sd-dhcp6-client.h"
#include "networkd-dhcp6.h"
#include "networkd-link.h"
#include "networkd-manager.h"
+#include "networkd-radv.h"
#include "siphash24.h"
#include "string-table.h"
#include "string-util.h"
#include "radv-internal.h"
#include "web-util.h"
-static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link);
-static Link *dhcp6_prefix_get(Manager *m, struct in6_addr *addr);
-static int dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link);
-static int dhcp6_prefix_remove_all(Manager *m, Link *link);
-static bool dhcp6_link_has_dhcpv6_prefix(Link *link);
-static int dhcp6_assign_delegated_prefix(Link *link, const struct in6_addr *prefix,
- uint8_t prefix_len,
- uint32_t lifetime_preferred,
- uint32_t lifetime_valid);
-
-static bool dhcp6_get_prefix_delegation(Link *link) {
- if (!link->network)
+static bool dhcp6_lease_has_pd_prefix(sd_dhcp6_lease *lease) {
+ uint32_t lifetime_preferred, lifetime_valid;
+ union in_addr_union pd_prefix;
+ uint8_t pd_prefix_len;
+
+ if (!lease)
return false;
- return IN_SET(link->network->router_prefix_delegation,
- RADV_PREFIX_DELEGATION_DHCP6,
- RADV_PREFIX_DELEGATION_BOTH);
+ sd_dhcp6_lease_reset_pd_prefix_iter(lease);
+
+ return sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len, &lifetime_preferred, &lifetime_valid) >= 0;
}
-static bool dhcp6_has_preferred_subnet_id(Link *link) {
- if (!link->network)
- return false;
+DHCP6DelegatedPrefix *dhcp6_pd_free(DHCP6DelegatedPrefix *p) {
+ if (!p)
+ return NULL;
- return link->network->router_prefix_subnet_id >= 0;
+ if (p->link && p->link->manager) {
+ hashmap_remove(p->link->manager->dhcp6_prefixes, &p->prefix);
+ set_remove(p->link->manager->dhcp6_pd_prefixes, p);
+ }
+
+ link_unref(p->link);
+ return mfree(p);
}
-static int dhcp6_get_preferred_delegated_prefix(
- Manager* manager,
- Link *link,
- const struct in6_addr *pd_prefix,
- uint8_t pd_prefix_len,
- struct in6_addr *ret_addr) {
-
- int64_t subnet_id = link->network->router_prefix_subnet_id;
- uint8_t prefix_bits = 64 - pd_prefix_len;
- uint64_t n_prefixes = UINT64_C(1) << prefix_bits;
- _cleanup_free_ char *assigned_buf = NULL;
- union in_addr_union pd_prefix_union = {
- .in6 = *pd_prefix,
- };
- /* We start off with the original PD prefix we have been assigned and
- * iterate from there */
- union in_addr_union prefix = {
- .in6 = *pd_prefix,
- };
+static void dhcp6_pd_hash_func(const DHCP6DelegatedPrefix *p, struct siphash *state) {
+ assert(p);
+
+ siphash24_compress(&p->pd_prefix, sizeof(p->pd_prefix), state);
+ siphash24_compress(&p->link, sizeof(p->link), state);
+}
+
+static int dhcp6_pd_compare_func(const DHCP6DelegatedPrefix *a, const DHCP6DelegatedPrefix *b) {
int r;
- assert(pd_prefix_len <= 64);
- assert(manager);
+ r = memcmp(&a->pd_prefix, &b->pd_prefix, sizeof(a->pd_prefix));
+ if (r != 0)
+ return r;
+
+ return CMP(a->link, b->link);
+}
+
+DEFINE_HASH_OPS(dhcp6_pd_hash_ops, DHCP6DelegatedPrefix, dhcp6_pd_hash_func, dhcp6_pd_compare_func);
+
+static Link *dhcp6_pd_get_link_by_prefix(Link *link, const union in_addr_union *prefix) {
+ DHCP6DelegatedPrefix *pd;
+
assert(link);
- assert(link->network);
+ assert(link->manager);
+ assert(prefix);
- if (subnet_id >= 0) {
- /* If the link has a preference for a particular subnet id try to allocate that */
- if ((uint64_t)subnet_id >= n_prefixes)
- return log_link_debug_errno(link,
- SYNTHETIC_ERRNO(ERANGE),
- "subnet id %" PRIi64 " is out of range. Only have %" PRIu64 " subnets.",
- subnet_id,
- n_prefixes);
+ pd = hashmap_get(link->manager->dhcp6_prefixes, &prefix->in6);
+ if (!pd)
+ return NULL;
- r = in_addr_prefix_nth(AF_INET6, &prefix, 64, subnet_id);
- if (r < 0)
- return log_link_debug_errno(link,
- r,
- "subnet id %" PRIi64 " is out of range. Only have %" PRIu64 " subnets.",
- subnet_id,
- n_prefixes);
+ return pd->link;
+}
- /* Verify that the prefix we did calculate fits in the pd prefix.
- * This should not fail as we checked the prefix size beforehand */
- assert_se(in_addr_prefix_covers(AF_INET6, &pd_prefix_union, pd_prefix_len, &prefix) > 0);
+static int dhcp6_pd_get_assigned_prefix(Link *link, const union in_addr_union *pd_prefix, union in_addr_union *ret_prefix) {
+ DHCP6DelegatedPrefix *pd, in;
+
+ assert(link);
+ assert(link->manager);
+ assert(pd_prefix);
+ assert(ret_prefix);
+
+ in = (DHCP6DelegatedPrefix) {
+ .pd_prefix = pd_prefix->in6,
+ .link = link,
+ };
+
+ pd = set_get(link->manager->dhcp6_pd_prefixes, &in);
+ if (!pd)
+ return -ENOENT;
+
+ ret_prefix->in6 = pd->prefix;
+ return 0;
+}
+
+static int dhcp6_pd_remove_old(Link *link, bool force);
- Link* assigned_link = dhcp6_prefix_get(manager, &prefix.in6);
+static int dhcp6_pd_address_callback(Address *address) {
+ Address *a;
+ Iterator i;
+
+ assert(address);
+ assert(address->link);
+
+ /* Make this called only once */
+ SET_FOREACH(a, address->link->dhcp6_pd_addresses, i)
+ a->callback = NULL;
- (void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf);
+ return dhcp6_pd_remove_old(address->link, true);
+}
+
+static int dhcp6_pd_remove_old(Link *link, bool force) {
+ Address *address;
+ Route *route;
+ Iterator i;
+ int k, r = 0;
- if (assigned_link && assigned_link != link)
- return log_link_error_errno(link, SYNTHETIC_ERRNO(EAGAIN),
- "The requested prefix %s is already assigned to another link: %s",
- strnull(assigned_buf),
- strnull(assigned_link->ifname));
+ assert(link);
+ assert(link->manager);
- *ret_addr = prefix.in6;
+ if (!force && (link->dhcp6_pd_address_messages != 0 || link->dhcp6_pd_route_configured != 0))
+ return 0;
- log_link_debug(link, "The requested prefix %s is available. Using it.",
- strnull(assigned_buf));
+ if (set_isempty(link->dhcp6_pd_addresses_old) && set_isempty(link->dhcp6_pd_routes_old))
return 0;
- } else {
- 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. */
- Link* assigned_link = dhcp6_prefix_get(manager, &prefix.in6);
-
- if (!assigned_link || assigned_link == link) {
- *ret_addr = prefix.in6;
- return 0;
+
+ if (!force) {
+ bool set_callback = !set_isempty(link->dhcp6_pd_addresses);
+
+ SET_FOREACH(address, link->dhcp6_pd_addresses, i)
+ if (address_is_ready(address)) {
+ set_callback = false;
+ break;
}
- r = in_addr_prefix_next(AF_INET6, &prefix, 64);
- if (r < 0)
- return log_link_error_errno(link,
- r,
- "Can't allocate another prefix. Out of address space?");
+ if (set_callback) {
+ SET_FOREACH(address, link->dhcp6_pd_addresses, i)
+ address->callback = dhcp6_pd_address_callback;
+ return 0;
}
+ }
+
+ log_link_debug(link, "Removing old DHCPv6 Prefix Delegation addresses and routes.");
- log_link_warning(link, "Couldn't find a suitable prefix. Ran out of address space.");
+ link_dirty(link);
+
+ SET_FOREACH(route, link->dhcp6_pd_routes_old, i) {
+ k = route_remove(route, link, NULL);
+ if (k < 0)
+ r = k;
+
+ (void) sd_radv_remove_prefix(link->radv, &route->dst.in6, 64);
+ dhcp6_pd_free(hashmap_get(link->manager->dhcp6_prefixes, &route->dst.in6));
}
- return -ERANGE;
+ SET_FOREACH(address, link->dhcp6_pd_addresses_old, i) {
+ k = address_remove(address, link, NULL);
+ if (k < 0)
+ r = k;
+ }
+
+ return r;
}
-static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) {
- Manager *manager;
- Link *l;
+int dhcp6_pd_remove(Link *link) {
+ Address *address;
+ Route *route;
Iterator i;
+ int k, r = 0;
- assert(dhcp6_link);
+ assert(link);
+ assert(link->manager);
- manager = dhcp6_link->manager;
- assert(manager);
+ link->dhcp6_pd_address_configured = false;
+ link->dhcp6_pd_route_configured = false;
- HASHMAP_FOREACH(l, manager->links, i) {
- if (l == dhcp6_link)
- continue;
+ k = dhcp6_pd_remove_old(link, true);
+ if (k < 0)
+ r = k;
- if (!dhcp6_get_prefix_delegation(l))
- continue;
+ if (set_isempty(link->dhcp6_pd_addresses) && set_isempty(link->dhcp6_pd_routes))
+ return r;
- return true;
+ log_link_debug(link, "Removing DHCPv6 Prefix Delegation addresses and routes.");
+
+ link_dirty(link);
+
+ SET_FOREACH(route, link->dhcp6_pd_routes, i) {
+ k = route_remove(route, link, NULL);
+ if (k < 0)
+ r = k;
+
+ (void) sd_radv_remove_prefix(link->radv, &route->dst.in6, 64);
+ dhcp6_pd_free(hashmap_get(link->manager->dhcp6_prefixes, &route->dst.in6));
}
- return false;
+ SET_FOREACH(address, link->dhcp6_pd_addresses, i) {
+ k = address_remove(address, link, NULL);
+ if (k < 0)
+ r = k;
+ }
+
+ return r;
}
-static int dhcp6_lease_information_acquired(sd_dhcp6_client *client,
- Link *link) {
- return 0;
+static int dhcp6_pd_route_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
+ int r;
+
+ assert(link);
+ assert(link->dhcp6_pd_route_messages > 0);
+
+ link->dhcp6_pd_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 DHCPv6 Prefix Delegation route");
+ link_enter_failed(link);
+ return 1;
+ }
+
+ if (link->dhcp6_pd_route_messages == 0) {
+ log_link_debug(link, "DHCPv6 prefix delegation routes set");
+ if (link->dhcp6_pd_prefixes_assigned)
+ link->dhcp6_pd_route_configured = true;
+
+ r = dhcp6_pd_remove_old(link, false);
+ if (r < 0) {
+ link_enter_failed(link);
+ return 1;
+ }
+
+ link_check_ready(link);
+ }
+
+ return 1;
}
-static int dhcp6_pd_prefix_assign(Link *link, struct in6_addr *prefix,
- uint8_t prefix_len,
- uint32_t lifetime_preferred,
- uint32_t lifetime_valid) {
- sd_radv *radv = link->radv;
+static int dhcp6_set_pd_route(Link *link, const union in_addr_union *prefix, const union in_addr_union *pd_prefix) {
+ _cleanup_(dhcp6_pd_freep) DHCP6DelegatedPrefix *pd = NULL;
+ _cleanup_(route_freep) Route *route = NULL;
+ Link *assigned_link;
+ Route *ret;
int r;
- _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
- r = sd_radv_prefix_new(&p);
- if (r < 0)
- return r;
+ assert(link);
+ assert(link->manager);
+ assert(prefix);
+ assert(pd_prefix);
- r = sd_radv_prefix_set_prefix(p, prefix, prefix_len);
+ r = route_new(&route);
if (r < 0)
return r;
- r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred);
- if (r < 0)
- return r;
+ route->family = AF_INET6;
+ route->dst = *prefix;
+ route->dst_prefixlen = 64;
- r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid);
+ r = route_configure(route, link, dhcp6_pd_route_handler, &ret);
if (r < 0)
- return r;
+ return log_link_error_errno(link, r, "Failed to set DHCPv6 prefix route: %m");
+
+ link->dhcp6_pd_route_messages++;
- r = sd_radv_stop(radv);
+ r = set_ensure_put(&link->dhcp6_pd_routes, &route_hash_ops, ret);
if (r < 0)
- return r;
+ return log_link_error_errno(link, r, "Failed to store DHCPv6 prefix route: %m");
- r = sd_radv_add_prefix(radv, p, true);
- if (r < 0 && r != -EEXIST)
- return r;
+ (void) set_remove(link->dhcp6_pd_routes_old, ret);
+
+ assigned_link = dhcp6_pd_get_link_by_prefix(link, prefix);
+ if (assigned_link) {
+ assert(assigned_link == link);
+ return 0;
+ }
+
+ pd = new(DHCP6DelegatedPrefix, 1);
+ if (!pd)
+ return log_oom();
+
+ *pd = (DHCP6DelegatedPrefix) {
+ .prefix = prefix->in6,
+ .pd_prefix = pd_prefix->in6,
+ .link = link_ref(link),
+ };
- r = dhcp6_prefix_add(link->manager, prefix, link);
+ r = hashmap_ensure_allocated(&link->manager->dhcp6_prefixes, &in6_addr_hash_ops);
if (r < 0)
- return r;
+ return log_oom();
- if (link->network->dhcp6_pd_assign_prefix) {
- r = dhcp6_assign_delegated_prefix(link, prefix, prefix_len, lifetime_preferred, lifetime_valid);
- if (r < 0)
- return r;
- }
+ r = hashmap_put(link->manager->dhcp6_prefixes, &pd->prefix, pd);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Failed to store DHCPv6 prefix route at manager: %m");
+
+ r = set_ensure_put(&link->manager->dhcp6_pd_prefixes, &dhcp6_pd_hash_ops, pd);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Failed to store DHCPv6 prefix route at manager: %m");
- return sd_radv_start(radv);
+ TAKE_PTR(pd);
+ return 0;
}
-static int dhcp6_route_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
+static int dhcp6_pd_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
int r;
assert(link);
+ assert(link->dhcp6_pd_address_messages > 0);
+
+ link->dhcp6_pd_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)
- log_link_message_warning_errno(link, m, r, "Received error on unreachable route removal for DHCPv6 delegated subnet");
+ if (r < 0 && r != -EEXIST) {
+ log_link_message_warning_errno(link, m, r, "Could not set DHCPv6 delegated prefix address");
+ link_enter_failed(link);
+ return 1;
+ } else if (r >= 0)
+ (void) manager_rtnl_process_address(rtnl, m, link->manager);
+
+ if (link->dhcp6_pd_address_messages == 0) {
+ log_link_debug(link, "DHCPv6 delegated prefix addresses set");
+ if (link->dhcp6_pd_prefixes_assigned)
+ link->dhcp6_pd_address_configured = true;
+
+ r = dhcp6_pd_remove_old(link, false);
+ if (r < 0) {
+ link_enter_failed(link);
+ return 1;
+ }
+
+ r = link_request_set_routes(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return 1;
+ }
+ }
return 1;
}
-int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link) {
- uint32_t lifetime_preferred, lifetime_valid;
- union in_addr_union pd_prefix;
- uint8_t pd_prefix_len;
- sd_dhcp6_lease *lease;
+static int dhcp6_set_pd_address(Link *link,
+ const union in_addr_union *prefix,
+ uint8_t prefix_len,
+ uint32_t lifetime_preferred,
+ uint32_t lifetime_valid) {
+
+ _cleanup_(address_freep) Address *address = NULL;
+ Address *ret;
int r;
- r = sd_dhcp6_client_get_lease(client, &lease);
+ assert(link);
+ assert(link->network);
+ assert(prefix);
+
+ if (!link->network->dhcp6_pd_assign)
+ return 0;
+
+ r = address_new(&address);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Failed to allocate address for DHCPv6 delegated prefix: %m");
+
+ address->in_addr = *prefix;
+
+ if (!in_addr_is_null(AF_INET6, &link->network->dhcp6_pd_token))
+ memcpy(address->in_addr.in6.s6_addr + 8, link->network->dhcp6_pd_token.in6.s6_addr + 8, 8);
+ else {
+ r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
+ if (r < 0)
+ return log_link_warning_errno(link, r, "Failed to generate EUI64 address for acquired DHCPv6 delegated prefix: %m");
+ }
+
+ address->prefixlen = prefix_len;
+ address->family = AF_INET6;
+ address->cinfo.ifa_prefered = lifetime_preferred;
+ address->cinfo.ifa_valid = lifetime_valid;
+
+ r = address_configure(address, link, dhcp6_pd_address_handler, true, &ret);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Failed to set DHCPv6 delegated prefix address: %m");
+
+ link->dhcp6_pd_address_messages++;
+
+ r = set_ensure_put(&link->dhcp6_pd_addresses, &address_hash_ops, ret);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Failed to store DHCPv6 delegated prefix address: %m");
+
+ (void) set_remove(link->dhcp6_pd_addresses_old, ret);
+
+ return 0;
+}
+
+static int dhcp6_pd_assign_prefix(Link *link, const union in_addr_union *prefix, const union in_addr_union *pd_prefix,
+ uint8_t prefix_len, uint32_t lifetime_preferred, uint32_t lifetime_valid) {
+ int r;
+
+ assert(link);
+ assert(prefix);
+
+ r = radv_add_prefix(link, &prefix->in6, prefix_len, lifetime_preferred, lifetime_valid);
if (r < 0)
return r;
- sd_dhcp6_lease_reset_pd_prefix_iter(lease);
+ r = dhcp6_set_pd_route(link, prefix, pd_prefix);
+ if (r < 0)
+ return r;
- while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len,
- &lifetime_preferred,
- &lifetime_valid) >= 0) {
- _cleanup_free_ char *buf = NULL;
- _cleanup_(route_freep) Route *route = NULL;
+ r = dhcp6_set_pd_address(link, prefix, prefix_len, lifetime_preferred, lifetime_valid);
+ if (r < 0)
+ return r;
- if (pd_prefix_len >= 64)
- continue;
+ return 0;
+}
+
+bool link_dhcp6_pd_is_enabled(Link *link) {
+ if (!link->network)
+ return false;
+
+ return link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_DHCP6;
+}
+
+static bool link_has_preferred_subnet_id(Link *link) {
+ if (!link->network)
+ return false;
+
+ return link->network->dhcp6_pd_subnet_id >= 0;
+}
+
+static int dhcp6_get_preferred_delegated_prefix(
+ Link *link,
+ const union in_addr_union *masked_pd_prefix,
+ uint8_t pd_prefix_len,
+ union in_addr_union *ret) {
+
+ /* We start off with the original PD prefix we have been assigned and iterate from there */
+ union in_addr_union prefix;
+ uint64_t n_prefixes;
+ Link *assigned_link;
+ int r;
+
+ assert(link);
+ assert(link->manager);
+ assert(masked_pd_prefix);
+ assert(pd_prefix_len <= 64);
+
+ n_prefixes = UINT64_C(1) << (64 - pd_prefix_len);
+ prefix = *masked_pd_prefix;
- (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf);
+ if (link_has_preferred_subnet_id(link)) {
+ uint64_t subnet_id = link->network->dhcp6_pd_subnet_id;
- r = route_new(&route);
+ /* If the link has a preference for a particular subnet id try to allocate that */
+ if (subnet_id >= n_prefixes)
+ return log_link_warning_errno(link, SYNTHETIC_ERRNO(ERANGE),
+ "subnet id %" PRIu64 " is out of range. Only have %" PRIu64 " subnets.",
+ subnet_id, n_prefixes);
+
+ r = in_addr_prefix_nth(AF_INET6, &prefix, 64, subnet_id);
if (r < 0)
- return r;
+ return log_link_warning_errno(link, r,
+ "subnet id %" PRIu64 " is out of range. Only have %" PRIu64 " subnets.",
+ subnet_id, n_prefixes);
+
+ /* Verify that the prefix we did calculate fits in the pd prefix.
+ * This should not fail as we checked the prefix size beforehand */
+ assert_se(in_addr_prefix_covers(AF_INET6, masked_pd_prefix, pd_prefix_len, &prefix) > 0);
- route->family = AF_INET6;
- route->dst = pd_prefix;
- route->dst_prefixlen = pd_prefix_len;
- route->type = RTN_UNREACHABLE;
+ assigned_link = dhcp6_pd_get_link_by_prefix(link, &prefix);
+ if (assigned_link && assigned_link != link) {
+ _cleanup_free_ char *assigned_buf = NULL;
- r = route_remove(route, link, dhcp6_route_remove_handler);
- if (r < 0) {
- log_link_warning_errno(link, r, "Cannot delete unreachable route for DHCPv6 delegated subnet %s/%u: %m",
- strnull(buf),
- pd_prefix_len);
- continue;
+ (void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf);
+ return log_link_warning_errno(link, SYNTHETIC_ERRNO(EAGAIN),
+ "The requested prefix %s is already assigned to another link.",
+ strna(assigned_buf));
}
- log_link_debug(link, "Removing unreachable route %s/%u",
- strnull(buf), pd_prefix_len);
+ *ret = prefix;
+ return 0;
}
- return 0;
+ 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 int dhcp6_pd_prefix_distribute(Link *dhcp6_link,
- struct in6_addr *pd_prefix,
+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) {
- _cleanup_free_ char *assigned_buf = NULL, *buf = NULL;
- Manager *manager = dhcp6_link->manager;
- union in_addr_union prefix = {
- .in6 = *pd_prefix,
- };
- bool pool_depleted = false;
- uint64_t n_prefixes;
Iterator i;
Link *link;
int r;
- assert(manager);
+ assert(dhcp6_link);
+ assert(dhcp6_link->manager);
+ assert(masked_pd_prefix);
assert(pd_prefix_len <= 64);
- r = in_addr_mask(AF_INET6, &prefix, pd_prefix_len);
- if (r < 0)
- return r;
-
- n_prefixes = UINT64_C(1) << (64 - pd_prefix_len);
-
- (void) in_addr_to_string(AF_INET6, &prefix, &buf);
- log_link_debug(dhcp6_link, "Assigning up to %" PRIu64 " prefixes from %s/%u",
- n_prefixes, strnull(buf), pd_prefix_len);
-
- HASHMAP_FOREACH(link, manager->links, i) {
+ HASHMAP_FOREACH(link, dhcp6_link->manager->links, i) {
+ _cleanup_free_ char *assigned_buf = NULL;
union in_addr_union assigned_prefix;
if (link == dhcp6_link)
continue;
- if (!dhcp6_get_prefix_delegation(link))
+ if (!link_dhcp6_pd_is_enabled(link))
continue;
- if (dhcp6_link_has_dhcpv6_prefix(link))
+ if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
continue;
- if (assign_preferred_subnet_id != dhcp6_has_preferred_subnet_id(link))
+ if (assign_preferred_subnet_id != link_has_preferred_subnet_id(link))
continue;
- r = dhcp6_get_preferred_delegated_prefix(manager, link, &prefix.in6, pd_prefix_len,
- &assigned_prefix.in6);
-
- if (assign_preferred_subnet_id && r == -EAGAIN) {
- /* A link has a preferred subnet_id but that one is
- * already taken by another link. Now all the remaining
- * links will also not obtain a prefix. */
- pool_depleted = true;
- continue;
- } else if (r < 0)
- return r;
+ 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_prefix_assign(link, &assigned_prefix.in6, 64,
+ 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 from %s/%u for link: %m",
- strnull(assigned_buf),
- strnull(buf), pd_prefix_len);
+ 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 from %s/%u to link",
- strnull(assigned_buf),
- strnull(buf), pd_prefix_len);
+ 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_request_set_routes() and link_request_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;
+ Iterator i;
+ int r;
+
+ assert(dhcp6_link);
+ assert(dhcp6_link->manager);
+
+ HASHMAP_FOREACH(link, dhcp6_link->manager->links, i) {
+ if (link == dhcp6_link)
+ continue;
+
+ if (!link_dhcp6_pd_is_enabled(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;
+ Iterator i;
+
+ assert(address);
+ assert(address->link);
- /* If one of the link requests couldn't be fulfilled, signal that we
- should try again with another prefix. */
- if (pool_depleted)
- return -EAGAIN;
+ /* Make this called only once */
+ SET_FOREACH(a, address->link->dhcp6_addresses, i)
+ a->callback = NULL;
+
+ return dhcp6_remove_old(address->link, true);
+}
+
+static int dhcp6_remove_old(Link *link, bool force) {
+ Address *address;
+ Route *route;
+ Iterator i;
+ 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, i)
+ if (address_is_ready(address)) {
+ set_callback = false;
+ break;
+ }
+
+ if (set_callback) {
+ SET_FOREACH(address, link->dhcp6_addresses, i)
+ 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, i) {
+ k = route_remove(route, link, NULL);
+ if (k < 0)
+ r = k;
+ }
+
+ SET_FOREACH(address, link->dhcp6_addresses_old, i) {
+ k = address_remove(address, link, NULL);
+ if (k < 0)
+ r = k;
+ }
+
+ return r;
+}
+
+static int dhcp6_remove(Link *link) {
+ Address *address;
+ Route *route;
+ Iterator i;
+ 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, i) {
+ k = route_remove(route, link, NULL);
+ if (k < 0)
+ r = k;
+ }
+
+ SET_FOREACH(address, link->dhcp6_addresses, i) {
+ k = address_remove(address, link, NULL);
+ if (k < 0)
+ r = k;
+ }
- return 0;
+ 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, "Received error when adding unreachable route for DHCPv6 delegated subnet");
-
- return 1;
-}
-
-static int dhcp6_lease_pd_prefix_acquired(sd_dhcp6_client *client, Link *link) {
- uint32_t lifetime_preferred, lifetime_valid;
- union in_addr_union pd_prefix;
- sd_dhcp6_lease *lease;
- uint8_t pd_prefix_len;
- int r;
-
- r = sd_dhcp6_client_get_lease(client, &lease);
- if (r < 0)
- return r;
-
- sd_dhcp6_lease_reset_pd_prefix_iter(lease);
+ 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;
+ }
- while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len,
- &lifetime_preferred,
- &lifetime_valid) >= 0) {
+ if (link->dhcp6_route_messages == 0) {
+ log_link_debug(link, "Unreachable routes for DHCPv6 delegated subnets set");
+ link->dhcp6_route_configured = true;
- _cleanup_free_ char *buf = NULL;
+ r = dhcp6_remove_old(link, false);
+ if (r < 0) {
+ link_enter_failed(link);
+ return 1;
+ }
- (void) in_addr_to_string(AF_INET6, &pd_prefix, &buf);
+ link_check_ready(link);
+ }
- if (pd_prefix_len > 64) {
- log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u",
- strnull(buf), pd_prefix_len);
- continue;
- }
+ return 1;
+}
- if (pd_prefix_len < 48)
- log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u",
- strnull(buf), pd_prefix_len);
+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;
- if (pd_prefix_len < 64) {
- _cleanup_(route_freep) Route *route = NULL;
+ assert(link);
+ assert(addr);
- r = route_new(&route);
- if (r < 0)
- return r;
+ (void) in_addr_to_string(AF_INET6, addr, &buf);
- route->family = AF_INET6;
- route->dst = pd_prefix;
- route->dst_prefixlen = pd_prefix_len;
- route->table = link_get_dhcp_route_table(link);
- route->type = RTN_UNREACHABLE;
+ if (prefixlen > 64) {
+ log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u",
+ strna(buf), prefixlen);
+ return 0;
+ }
- r = route_configure(route, link, dhcp6_route_handler);
- if (r < 0) {
- log_link_warning_errno(link, r, "Cannot configure unreachable route for delegated subnet %s/%u: %m",
- strnull(buf),
- pd_prefix_len);
- continue;
- }
+ 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;
+ }
- log_link_debug(link, "Configuring unreachable route for %s/%u",
- strnull(buf), pd_prefix_len);
- } else
- log_link_debug(link, "Not adding a blocking route since distributed prefix is /64");
+ if (prefixlen < 48)
+ log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u",
+ strna(buf), prefixlen);
- /* 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.
+ r = route_new(&route);
+ if (r < 0)
+ return log_oom();
- * If a subnet id request couldn't be fulfilled the failure will be logged (as error)
- * and no further attempts at obtaining a prefix will be made.
+ route->family = AF_INET6;
+ route->dst = *addr;
+ route->dst_prefixlen = prefixlen;
+ route->table = link_get_dhcp_route_table(link);
+ route->type = RTN_UNREACHABLE;
- * 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. */
+ 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);
- r = dhcp6_pd_prefix_distribute(link, &pd_prefix.in6,
- pd_prefix_len,
- lifetime_preferred,
- lifetime_valid,
- true);
- if (r < 0 && r != -EAGAIN)
- return r;
+ link->dhcp6_route_messages++;
- /* if r == -EAGAIN then the allocation failed because we ran
- * out of addresses for the preferred subnet id's. This doesn't
- * mean we can't fulfill other prefix requests.
- *
- * Since we do not have dedicated lists of links that request
- * specific subnet id's and those that accept any prefix we
- * *must* reset the iterator to the start as otherwise some
- * links might not get their requested prefix. */
-
- r = dhcp6_pd_prefix_distribute(link, &pd_prefix.in6,
- pd_prefix_len,
- lifetime_preferred,
- lifetime_valid,
- false);
- if (r < 0 && r != -EAGAIN)
- return r;
+ 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);
- /* If the prefix distribution did return -EAGAIN we will try to
- * fulfill those with the next available pd delegated prefix. */
- }
+ (void) set_remove(link->dhcp6_routes_old, ret);
- return 0;
+ return 1;
}
-int dhcp6_request_prefix_delegation(Link *link) {
- Link *l;
+static int dhcp6_pd_prefix_acquired(Link *dhcp6_link) {
Iterator i;
+ Link *link;
+ int r;
- assert_return(link, -EINVAL);
- assert_return(link->manager, -EOPNOTSUPP);
+ assert(dhcp6_link);
+ assert(dhcp6_link->dhcp6_lease);
- if (dhcp6_get_prefix_delegation(link) <= 0)
- return 0;
+ HASHMAP_FOREACH(link, dhcp6_link->manager->links, i) {
+ if (link == dhcp6_link)
+ continue;
- log_link_debug(link, "Requesting DHCPv6 prefixes to be delegated for new link");
+ r = dhcp6_pd_prepare(link);
+ if (r < 0)
+ link_enter_failed(link);
+ }
- HASHMAP_FOREACH(l, link->manager->links, i) {
- int r, enabled;
+ 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;
- if (l == link)
- continue;
+ r = sd_dhcp6_lease_get_pd(dhcp6_link->dhcp6_lease, &pd_prefix.in6, &pd_prefix_len,
+ &lifetime_preferred, &lifetime_valid);
+ if (r < 0)
+ break;
- if (!l->dhcp6_client)
+ r = dhcp6_set_unreachable_route(dhcp6_link, &pd_prefix, pd_prefix_len);
+ if (r < 0)
+ return r;
+ if (r == 0)
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");
- 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. */
- 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");
- continue;
- }
- }
+ assert(pd_prefix_len <= 64);
- r = sd_dhcp6_client_is_running(l->dhcp6_client);
- if (r <= 0)
- continue;
+ 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 (enabled != 0) {
- log_link_debug(l, "Requesting re-assignment of delegated prefixes after adding new link");
- (void) dhcp6_lease_pd_prefix_acquired(l->dhcp6_client, l);
+ if (DEBUG_LOGGING) {
+ uint64_t n_prefixes = UINT64_C(1) << (64 - pd_prefix_len);
+ _cleanup_free_ char *buf = NULL;
- continue;
+ (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);
}
- 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");
- continue;
- }
+ 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);
+ }
- 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");
+ HASHMAP_FOREACH(link, dhcp6_link->manager->links, i) {
+ if (link == dhcp6_link)
continue;
- }
- log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link");
+ r = dhcp6_pd_finalize(link);
+ if (r < 0)
+ link_enter_failed(link);
}
return 0;
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;
} else if (r >= 0)
(void) manager_rtnl_process_address(rtnl, m, link->manager);
- r = link_request_set_routes(link);
- if (r < 0) {
- link_enter_failed(link);
- return 1;
+ 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_request_set_routes(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return 1;
+ }
}
return 1;
}
-static int dhcp6_address_change(
+static int dhcp6_update_address(
Link *link,
- struct in6_addr *ip6_addr,
+ 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 r;
+ return log_oom();
addr->family = AF_INET6;
addr->in_addr.in6 = *ip6_addr;
addr->cinfo.ifa_valid = lifetime_valid;
(void) in_addr_to_string(addr->family, &addr->in_addr, &buffer);
- log_link_info(link,
- "DHCPv6 address %s/%d timeout preferred %d valid %d",
- strnull(buffer), addr->prefixlen, lifetime_preferred, lifetime_valid);
+ log_link_info(link, "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);
- r = address_configure(addr, link, dhcp6_address_handler, true);
+ link->dhcp6_address_messages++;
+
+ r = set_ensure_put(&link->dhcp6_addresses, &address_hash_ops, ret);
if (r < 0)
- return log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m");
+ 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_lease_address_acquired(sd_dhcp6_client *client, Link *link) {
+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;
- struct in6_addr ip6_addr;
- uint32_t lifetime_preferred, lifetime_valid;
+ 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 r;
+ return log_link_error_errno(link, r, "Failed to get DHCPv6 lease: %m");
- sd_dhcp6_lease_reset_address_iter(lease);
+ lease_old = TAKE_PTR(link->dhcp6_lease);
+ link->dhcp6_lease = sd_dhcp6_lease_ref(lease);
- while (sd_dhcp6_lease_get_address(lease, &ip6_addr,
- &lifetime_preferred,
- &lifetime_valid) >= 0) {
+ r = dhcp6_address_acquired(link);
+ if (r < 0)
+ return r;
- r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid);
+ 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_request_set_routes() and link_request_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 void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
+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) {
+ switch (event) {
case SD_DHCP6_CLIENT_EVENT_STOP:
case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
- if (sd_dhcp6_client_get_lease(client, NULL) >= 0)
- log_link_warning(link, "DHCPv6 lease lost");
-
- (void) dhcp6_lease_pd_prefix_lost(client, link);
- (void) dhcp6_prefix_remove_all(link->manager, link);
-
- link_dirty(link);
- link->dhcp6_configured = false;
+ r = dhcp6_lease_lost(link);
+ if (r < 0)
+ link_enter_failed(link);
break;
case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
- r = dhcp6_lease_address_acquired(client, link);
+ r = dhcp6_lease_ip_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
- r = dhcp6_lease_pd_prefix_acquired(client, link);
- if (r < 0)
- log_link_debug(link, "DHCPv6 did not receive prefixes to delegate");
-
_fallthrough_;
case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
r = dhcp6_lease_information_acquired(client, link);
- if (r < 0) {
+ if (r < 0)
link_enter_failed(link);
- return;
- }
-
- link_dirty(link);
- link->dhcp6_configured = true;
break;
default:
log_link_warning(link, "DHCPv6 unknown event: %d", event);
return;
}
-
- link_check_ready(link);
}
int dhcp6_request_address(Link *link, int ir) {
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);
+ 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)
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;
+ 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;
+ Iterator i;
+
+ 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, i) {
+ 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;
- ir = false;
- }
+ 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;
+ }
- if (running) {
- r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req);
- if (r < 0)
- return r;
+ 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;
+ }
- if (inf_req == ir)
- return 0;
+ 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;
+ }
- 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;
+ log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link");
}
- 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;
+ /* dhcp6_pd_prefix_acquired() may make the link in failed state. */
+ if (link->state == LINK_STATE_FAILED)
+ return -ENOANO;
return 0;
}
return 0;
}
+static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) {
+ Link *link;
+ Iterator i;
+
+ assert(dhcp6_link);
+ assert(dhcp6_link->manager);
+
+ HASHMAP_FOREACH(link, dhcp6_link->manager->links, i) {
+ if (link == dhcp6_link)
+ continue;
+
+ if (!link_dhcp6_pd_is_enabled(link))
+ continue;
+
+ return true;
+ }
+
+ return false;
+}
+
int dhcp6_configure(Link *link) {
_cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
sd_dhcp6_option *vendor_option;
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);
}
return 0;
}
-static Link *dhcp6_prefix_get(Manager *m, struct in6_addr *addr) {
- assert_return(m, NULL);
- assert_return(addr, NULL);
-
- return hashmap_get(m->dhcp6_prefixes, addr);
-}
-
-static int dhcp6_route_add_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
- int r;
-
- assert(link);
-
- 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, "Received error adding DHCPv6 Prefix Delegation route");
- link_enter_failed(link);
- return 1;
- }
-
- return 1;
-}
-
-static int dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
- _cleanup_(route_freep) Route *route = NULL;
- _cleanup_free_ struct in6_addr *a = NULL;
- _cleanup_free_ char *buf = NULL;
- Link *assigned_link;
- int r;
-
- assert_return(m, -EINVAL);
- assert_return(addr, -EINVAL);
-
- r = route_new(&route);
- if (r < 0)
- return r;
-
- route->family = AF_INET6;
- route->dst.in6 = *addr;
- route->dst_prefixlen = 64;
-
- r = route_configure(route, link, dhcp6_route_add_handler);
- if (r < 0)
- return r;
-
- (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
- log_link_debug(link, "Adding prefix route %s/64", strnull(buf));
-
- assigned_link = hashmap_get(m->dhcp6_prefixes, addr);
- if (assigned_link) {
- assert(assigned_link == link);
- return 0;
- }
-
- a = newdup(struct in6_addr, addr, 1);
- if (!a)
- return -ENOMEM;
-
- r = hashmap_ensure_allocated(&m->dhcp6_prefixes, &in6_addr_hash_ops);
- if (r < 0)
- return r;
-
- r = hashmap_put(m->dhcp6_prefixes, a, link);
- if (r < 0)
- return r;
-
- TAKE_PTR(a);
- link_ref(link);
- return 0;
-}
-
-static int dhcp6_prefix_remove_handler(sd_netlink *nl, sd_netlink_message *m, Link *link) {
- int r;
-
- assert(link);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return 1;
-
- r = sd_netlink_message_get_errno(m);
- if (r < 0) {
- log_link_message_warning_errno(link, m, r, "Received error on DHCPv6 Prefix Delegation route removal");
- link_enter_failed(link);
- return 1;
- }
-
- return 1;
-}
-
-int dhcp6_prefix_remove(Manager *m, struct in6_addr *addr) {
- _cleanup_free_ struct in6_addr *a = NULL;
- _cleanup_(link_unrefp) Link *l = NULL;
- _cleanup_(route_freep) Route *route = NULL;
- _cleanup_free_ char *buf = NULL;
- int r;
-
- assert_return(m, -EINVAL);
- assert_return(addr, -EINVAL);
-
- l = hashmap_remove2(m->dhcp6_prefixes, addr, (void **) &a);
- if (!l)
- return -EINVAL;
-
- (void) sd_radv_remove_prefix(l->radv, addr, 64);
-
- r = route_new(&route);
- if (r < 0)
- return r;
-
- route->family = AF_INET6;
- route->dst.in6 = *addr;
- route->dst_prefixlen = 64;
-
- r = route_remove(route, l, dhcp6_prefix_remove_handler);
- if (r < 0)
- return r;
-
- (void) in_addr_to_string(AF_INET6, (union in_addr_union *) addr, &buf);
- log_link_debug(l, "Removing prefix route %s/64", strnull(buf));
-
- return 0;
-}
-
-static int dhcp6_prefix_remove_all(Manager *m, Link *link) {
- struct in6_addr *addr;
- Iterator i;
- Link *l;
-
- assert_return(m, -EINVAL);
- assert_return(link, -EINVAL);
-
- HASHMAP_FOREACH_KEY(l, addr, m->dhcp6_prefixes, i)
- if (l == link)
- (void) dhcp6_prefix_remove(m, addr);
-
- return 0;
-}
-
-static bool dhcp6_link_has_dhcpv6_prefix(Link *link) {
- Iterator i;
- Link *l;
-
- assert(link);
- assert(link->manager);
-
- HASHMAP_FOREACH(l, link->manager->dhcp6_prefixes, i)
- if (link == l)
- return true;
-
- return false;
-}
-
-static int dhcp6_assign_delegated_prefix(Link *link,
- const struct in6_addr *prefix,
- uint8_t prefix_len,
- uint32_t lifetime_preferred,
- uint32_t lifetime_valid) {
-
- _cleanup_(address_freep) Address *address = NULL;
- int r;
-
- assert(link);
- assert(link->network);
- assert(prefix);
-
- if (!link->network->dhcp6_pd_assign_prefix)
- return 0;
-
- r = address_new(&address);
- if (r < 0)
- return log_link_error_errno(link, r, "Failed to allocate address for DHCPv6 delegated prefix: %m");
-
- address->in_addr.in6 = *prefix;
-
- if (!in_addr_is_null(AF_INET6, &link->network->dhcp6_delegation_prefix_token))
- memcpy(address->in_addr.in6.s6_addr + 8, link->network->dhcp6_delegation_prefix_token.in6.s6_addr + 8, 8);
- else {
- r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
- if (r < 0)
- return log_link_warning_errno(link, r, "Failed to generate EUI64 address for acquired DHCPv6 delegated prefix: %m");
- }
-
- address->prefixlen = prefix_len;
- address->family = AF_INET6;
- address->cinfo.ifa_prefered = lifetime_preferred;
- address->cinfo.ifa_valid = lifetime_valid;
-
- link_set_state(link, LINK_STATE_CONFIGURING);
-
- r = address_configure(address, link, address_handler, true);
- if (r < 0)
- return log_link_warning_errno(link, r, "Failed to set acquired DHCPv6 delegated prefix address: %m");
- if (r > 0)
- link->address_messages++;
-
- return 0;
-}
-
int config_parse_dhcp6_pd_hint(
const char* unit,
const char *filename,
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_ERR, filename, line, r, "Failed to parse PrefixDelegationHint=%s, ignoring assignment", rvalue);
+ 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_ERR, filename, line, 0, "Invalid prefix length='%d', ignoring assignment", network->dhcp6_pd_length);
+ 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;
}
r = cunescape(rvalue, 0, &unescaped);
if (r < 0) {
- log_syntax(unit, LOG_ERR, filename, line, r,
+ 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_ERR, filename, line, 0,
+ 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);
}
-int config_parse_dhcp6_delegated_prefix_token(
+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,
void *data,
void *userdata) {
- Network *network = data;
+ int64_t *p = data;
+ uint64_t t;
int r;
assert(filename);
assert(rvalue);
assert(data);
- if (isempty(rvalue)) {
- network->dhcp6_delegation_prefix_token = IN_ADDR_NULL;
+ if (isempty(rvalue) || streq(rvalue, "auto")) {
+ *p = -1;
return 0;
}
- r = in_addr_from_string(AF_INET6, rvalue, &network->dhcp6_delegation_prefix_token);
+ r = safe_atoux64(rvalue, &t);
if (r < 0) {
- log_syntax(unit, LOG_ERR, filename, line, r,
- "Failed to parse DHCPv6 %s, ignoring: %s", lvalue, rvalue);
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse %s=, ignoring assignment: %s",
+ lvalue, rvalue);
return 0;
}
-
- if (in_addr_is_null(AF_INET6, &network->dhcp6_delegation_prefix_token)) {
- log_syntax(unit, LOG_ERR, filename, line, 0,
- "DHCPv6 %s cannot be the ANY address, ignoring: %s", lvalue, rvalue);
+ 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;
}
-DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp6_client_start_mode, dhcp6_client_start_mode, DHCP6ClientStartMode,
- "Failed to parse WithoutRA= setting");
+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) {
-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",
-};
+ union in_addr_union *addr = data, tmp;
+ int r;
-DEFINE_STRING_TABLE_LOOKUP(dhcp6_client_start_mode, DHCP6ClientStartMode);
+ 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;
+}
projects / thirdparty / systemd.git / blobdiff