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Systemd/src/network/networkd-dhcp6.c
Yu Watanabe 4ff296b024 network: make link enter failed state when a configuration fails 
Some path of configuring address, route or etc., go to failed state, but
some do not. E.g., failure in address configuration which is provided by
DHCPv4 goes to failed state, but static address does not.

This is just for consistency. This should not change anything if
everything is fine.

This also voidify manager_rtnl_process_address().
2019-07-15 21:52:06 +09:00

840 lines
28 KiB
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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
Copyright © 2014 Intel Corporation. All rights reserved.
***/
#include <netinet/in.h>
#include <linux/if.h>
#include "sd-radv.h"
#include "sd-dhcp6-client.h"
#include "hashmap.h"
#include "hostname-util.h"
#include "missing_network.h"
#include "network-internal.h"
#include "networkd-dhcp6.h"
#include "networkd-link.h"
#include "networkd-manager.h"
#include "siphash24.h"
#include "string-util.h"
#include "radv-internal.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_get_prefix_delegation(Link *link) {
if (!link->network)
return false;
return IN_SET(link->network->router_prefix_delegation,
RADV_PREFIX_DELEGATION_DHCP6,
RADV_PREFIX_DELEGATION_BOTH);
}
static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) {
Manager *manager;
Link *l;
Iterator i;
assert(dhcp6_link);
manager = dhcp6_link->manager;
assert(manager);
HASHMAP_FOREACH(l, manager->links, i) {
if (l == dhcp6_link)
continue;
if (!dhcp6_get_prefix_delegation(l))
continue;
return true;
}
return false;
}
static int dhcp6_lease_information_acquired(sd_dhcp6_client *client,
Link *link) {
return 0;
}
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;
int r;
_cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
r = sd_radv_prefix_new(&p);
if (r < 0)
return r;
r = sd_radv_prefix_set_prefix(p, prefix, prefix_len);
if (r < 0)
return r;
r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred);
if (r < 0)
return r;
r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid);
if (r < 0)
return r;
r = sd_radv_stop(radv);
if (r < 0)
return r;
r = sd_radv_add_prefix(radv, p, true);
if (r < 0 && r != -EEXIST)
return r;
r = dhcp6_prefix_add(link->manager, prefix, link);
if (r < 0)
return r;
return sd_radv_start(radv);
}
static int dhcp6_route_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_debug_errno(link, r, "Received error on unreachable route removal for DHCPv6 delegated subnet: %m");
return 1;
}
int dhcp6_lease_pd_prefix_lost(sd_dhcp6_client *client, Link* link) {
int r;
sd_dhcp6_lease *lease;
union in_addr_union pd_prefix;
uint8_t pd_prefix_len;
uint32_t lifetime_preferred, lifetime_valid;
r = sd_dhcp6_client_get_lease(client, &lease);
if (r < 0)
return r;
sd_dhcp6_lease_reset_pd_prefix_iter(lease);
while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len,
&lifetime_preferred,
&lifetime_valid) >= 0) {
_cleanup_free_ char *buf = NULL;
Route *route;
if (pd_prefix_len >= 64)
continue;
(void) in_addr_to_string(AF_INET6, &pd_prefix, &buf);
r = route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, 0, 0, 0, &route);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to add unreachable route to delete for DHCPv6 delegated subnet %s/%u: %m",
strnull(buf),
pd_prefix_len);
continue;
}
route_update(route, NULL, 0, NULL, NULL, 0, 0, RTN_UNREACHABLE);
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;
}
log_link_debug(link, "Removing unreachable route %s/%u",
strnull(buf), pd_prefix_len);
}
return 0;
}
static int dhcp6_pd_prefix_distribute(Link *dhcp6_link, Iterator *i,
struct in6_addr *pd_prefix,
uint8_t pd_prefix_len,
uint32_t lifetime_preferred,
uint32_t lifetime_valid) {
Link *link;
Manager *manager = dhcp6_link->manager;
union in_addr_union prefix;
uint64_t n_prefixes, n_used = 0;
_cleanup_free_ char *buf = NULL;
_cleanup_free_ char *assigned_buf = NULL;
int r;
assert(manager);
assert(pd_prefix_len <= 64);
prefix.in6 = *pd_prefix;
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);
while (hashmap_iterate(manager->links, i, (void **)&link, NULL)) {
Link *assigned_link;
if (n_used == n_prefixes) {
log_link_debug(dhcp6_link, "Assigned %" PRIu64 "/%" PRIu64 " prefixes from %s/%u",
n_used, n_prefixes, strnull(buf), pd_prefix_len);
return -EAGAIN;
}
if (link == dhcp6_link)
continue;
if (!dhcp6_get_prefix_delegation(link))
continue;
assigned_link = dhcp6_prefix_get(manager, &prefix.in6);
if (assigned_link && assigned_link != link)
continue;
(void) in_addr_to_string(AF_INET6, &prefix, &assigned_buf);
r = dhcp6_pd_prefix_assign(link, &prefix.in6, 64,
lifetime_preferred, lifetime_valid);
if (r < 0) {
log_link_error_errno(link, r, "Unable to %s prefix %s/64 from %s/%u for link: %m",
assigned_link ? "update": "assign",
strnull(assigned_buf),
strnull(buf), pd_prefix_len);
if (!assigned_link)
continue;
} else
log_link_debug(link, "Assigned prefix %" PRIu64 "/%" PRIu64 " %s/64 from %s/%u to link",
n_used + 1, n_prefixes,
strnull(assigned_buf),
strnull(buf), pd_prefix_len);
n_used++;
r = in_addr_prefix_next(AF_INET6, &prefix, 64);
if (r < 0 && n_used < n_prefixes)
return r;
}
return 0;
}
static int dhcp6_route_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_debug_errno(link, r, "Received error when adding unreachable route for DHCPv6 delegated subnet: %m");
return 1;
}
static int dhcp6_lease_pd_prefix_acquired(sd_dhcp6_client *client, Link *link) {
int r;
sd_dhcp6_lease *lease;
union in_addr_union pd_prefix;
uint8_t pd_prefix_len;
uint32_t lifetime_preferred, lifetime_valid;
Iterator i = ITERATOR_FIRST;
r = sd_dhcp6_client_get_lease(client, &lease);
if (r < 0)
return r;
sd_dhcp6_lease_reset_pd_prefix_iter(lease);
while (sd_dhcp6_lease_get_pd(lease, &pd_prefix.in6, &pd_prefix_len,
&lifetime_preferred,
&lifetime_valid) >= 0) {
_cleanup_free_ char *buf = NULL;
(void) in_addr_to_string(AF_INET6, &pd_prefix, &buf);
if (pd_prefix_len > 64) {
log_link_debug(link, "PD Prefix length > 64, ignoring prefix %s/%u",
strnull(buf), pd_prefix_len);
continue;
}
if (pd_prefix_len < 48)
log_link_warning(link, "PD Prefix length < 48, looks unusual %s/%u",
strnull(buf), pd_prefix_len);
if (pd_prefix_len < 64) {
uint32_t table;
Route *route;
table = link_get_dhcp_route_table(link);
r = route_add(link, AF_INET6, &pd_prefix, pd_prefix_len, 0, 0, table, &route);
if (r < 0) {
log_link_warning_errno(link, r, "Failed to add unreachable route for DHCPv6 delegated subnet %s/%u: %m",
strnull(buf),
pd_prefix_len);
continue;
}
route_update(route, NULL, 0, NULL, NULL, 0, 0, RTN_UNREACHABLE);
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;
}
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");
r = dhcp6_pd_prefix_distribute(link, &i, &pd_prefix.in6,
pd_prefix_len,
lifetime_preferred,
lifetime_valid);
if (r < 0 && r != -EAGAIN)
return r;
if (r >= 0)
i = ITERATOR_FIRST;
}
return 0;
}
int dhcp6_request_prefix_delegation(Link *link) {
Link *l;
Iterator i;
assert_return(link, -EINVAL);
assert_return(link->manager, -EOPNOTSUPP);
if (dhcp6_get_prefix_delegation(link) <= 0)
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");
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");
continue;
}
}
r = sd_dhcp6_client_is_running(l->dhcp6_client);
if (r <= 0)
continue;
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);
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");
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");
continue;
}
log_link_debug(l, "Restarted DHCPv6 client to acquire prefix delegations after adding new link");
}
return 0;
}
static int dhcp6_address_handler(sd_netlink *rtnl, 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) {
if (link->rtnl_extended_attrs) {
log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism");
link->rtnl_extended_attrs = false;
dhcp6_lease_address_acquired(link->dhcp6_client, link);
return 1;
}
log_link_error_errno(link, r, "Could not set DHCPv6 address: %m");
link_enter_failed(link);
return 1;
}
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;
}
return 1;
}
static int dhcp6_address_change(
Link *link,
struct in6_addr *ip6_addr,
uint32_t lifetime_preferred,
uint32_t lifetime_valid) {
_cleanup_(address_freep) Address *addr = NULL;
_cleanup_free_ char *buffer = NULL;
int r;
r = address_new(&addr);
if (r < 0)
return r;
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_info(link,
"DHCPv6 address %s/%d timeout preferred %d valid %d",
strnull(buffer), addr->prefixlen, lifetime_preferred, lifetime_valid);
r = address_configure(addr, link, dhcp6_address_handler, true);
if (r < 0)
return log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m");
return 0;
}
static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) {
int r;
sd_dhcp6_lease *lease;
struct in6_addr ip6_addr;
uint32_t lifetime_preferred, lifetime_valid;
r = sd_dhcp6_client_get_lease(client, &lease);
if (r < 0)
return r;
sd_dhcp6_lease_reset_address_iter(lease);
while (sd_dhcp6_lease_get_address(lease, &ip6_addr,
&lifetime_preferred,
&lifetime_valid) >= 0) {
r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid);
if (r < 0)
return r;
}
return 0;
}
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
int r;
Link *link = userdata;
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:
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->dhcp6_configured = false;
break;
case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
r = dhcp6_lease_address_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) {
link_enter_failed(link);
return;
}
link->dhcp6_configured = true;
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;
}
link_check_ready(link);
}
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;
else
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;
}
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;
}
int dhcp6_configure(Link *link) {
_cleanup_(sd_dhcp6_client_unrefp) sd_dhcp6_client *client = NULL;
const DUID *duid;
int r;
assert(link);
assert(link->network);
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, NULL, 0);
if (r < 0)
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to attach event: %m");
r = sd_dhcp6_client_set_mac(client,
(const uint8_t *) &link->mac,
sizeof (link->mac), ARPHRD_ETHER);
if (r < 0)
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set MAC address: %m");
if (link->network->iaid_set) {
r = sd_dhcp6_client_set_iaid(client, link->network->iaid);
if (r < 0)
return log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set IAID: %m");
}
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 log_link_error_errno(link, r, "DHCP6 CLIENT: Failed to set DUID: %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->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");
}
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");
}
link->dhcp6_client = TAKE_PTR(client);
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_debug_errno(link, r, "Received error adding DHCPv6 Prefix Delegation route: %m");
link_enter_failed(link);
return 1;
}
return 1;
}
static int dhcp6_prefix_add(Manager *m, struct in6_addr *addr, Link *link) {
_cleanup_free_ struct in6_addr *a = NULL;
_cleanup_free_ char *buf = NULL;
Link *assigned_link;
Route *route;
int r;
assert_return(m, -EINVAL);
assert_return(addr, -EINVAL);
r = route_add(link, AF_INET6, (union in_addr_union *) addr, 64,
0, 0, 0, &route);
if (r < 0)
return r;
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_debug_errno(link, r, "Received error on DHCPv6 Prefix Delegation route removal: %m");
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_free_ char *buf = NULL;
Route *route;
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_get(l, AF_INET6, (union in_addr_union *) addr, 64, 0, 0, 0, &route);
if (r < 0)
return r;
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;
}
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