1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright (C) 2014 Intel Corporation. All rights reserved.
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <netinet/ether.h>
25 #include "networkd-link.h"
26 #include "network-internal.h"
28 #include "sd-icmp6-nd.h"
29 #include "sd-dhcp6-client.h"
31 static int dhcp6_lease_address_acquired(sd_dhcp6_client
*client
, Link
*link
);
33 static int dhcp6_lease_information_acquired(sd_dhcp6_client
*client
,
38 static int dhcp6_address_handler(sd_netlink
*rtnl
, sd_netlink_message
*m
,
40 _cleanup_link_unref_ Link
*link
= userdata
;
45 r
= sd_netlink_message_get_errno(m
);
46 if (r
< 0 && r
!= -EEXIST
) {
47 if (link
->rtnl_extended_attrs
) {
48 log_link_warning(link
, "Could not set extended netlink attributes, reverting to fallback mechanism");
50 link
->rtnl_extended_attrs
= false;
51 dhcp6_lease_address_acquired(link
->dhcp6_client
, link
);
56 log_link_error_errno(link
, r
, "Could not set DHCPv6 address: %m");
58 link_enter_failed(link
);
61 link_rtnl_process_address(rtnl
, m
, link
->manager
);
66 static int dhcp6_address_update(Link
*link
, struct in6_addr
*ip6_addr
,
67 uint8_t prefixlen
, uint32_t lifetime_preferred
,
68 uint32_t lifetime_valid
) {
70 _cleanup_address_free_ Address
*addr
= NULL
;
72 r
= address_new_dynamic(&addr
);
76 addr
->family
= AF_INET6
;
77 memcpy(&addr
->in_addr
.in6
, ip6_addr
, sizeof(*ip6_addr
));
79 addr
->flags
= IFA_F_NOPREFIXROUTE
;
80 addr
->prefixlen
= prefixlen
;
82 addr
->cinfo
.ifa_prefered
= lifetime_preferred
;
83 addr
->cinfo
.ifa_valid
= lifetime_valid
;
86 "DHCPv6 address "SD_ICMP6_ND_ADDRESS_FORMAT_STR
"/%d timeout preferred %d valid %d",
87 SD_ICMP6_ND_ADDRESS_FORMAT_VAL(addr
->in_addr
.in6
),
88 addr
->prefixlen
, lifetime_preferred
, lifetime_valid
);
90 r
= address_update(addr
, link
, dhcp6_address_handler
);
92 log_link_warning_errno(link
, r
, "Could not assign DHCPv6 address: %m");
97 static int dhcp6_lease_address_acquired(sd_dhcp6_client
*client
, Link
*link
) {
99 sd_dhcp6_lease
*lease
;
100 struct in6_addr ip6_addr
;
101 uint32_t lifetime_preferred
, lifetime_valid
;
104 r
= sd_dhcp6_client_get_lease(client
, &lease
);
108 sd_dhcp6_lease_reset_address_iter(lease
);
110 while (sd_dhcp6_lease_get_address(lease
, &ip6_addr
,
112 &lifetime_valid
) >= 0) {
114 r
= sd_icmp6_ra_get_prefixlen(link
->icmp6_router_discovery
,
115 &ip6_addr
, &prefixlen
);
116 if (r
< 0 && r
!= -EADDRNOTAVAIL
) {
117 log_link_warning_errno(link
, r
, "Could not get prefix information: %m");
121 if (r
== -EADDRNOTAVAIL
)
124 r
= dhcp6_address_update(link
, &ip6_addr
, prefixlen
,
125 lifetime_preferred
, lifetime_valid
);
133 static void dhcp6_handler(sd_dhcp6_client
*client
, int event
, void *userdata
) {
135 Link
*link
= userdata
;
138 assert(link
->network
);
139 assert(link
->manager
);
141 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
145 case SD_DHCP6_CLIENT_EVENT_STOP
:
146 case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE
:
147 case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX
:
148 log_link_warning(link
, "DHCPv6 lease lost");
150 link
->dhcp6_configured
= false;
153 case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE
:
154 r
= dhcp6_lease_address_acquired(client
, link
);
156 link_enter_failed(link
);
161 case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST
:
162 r
= dhcp6_lease_information_acquired(client
, link
);
164 link_enter_failed(link
);
168 link
->dhcp6_configured
= true;
173 log_link_warning_errno(link
, event
, "DHCPv6 error: %m");
175 log_link_warning(link
, "DHCPv6 unknown event: %d", event
);
179 link_client_handler(link
);
182 static int dhcp6_configure(Link
*link
, int event
) {
184 bool information_request
;
186 assert_return(link
, -EINVAL
);
187 assert_return(IN_SET(event
, SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_TIMEOUT
,
188 SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_OTHER
,
189 SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_MANAGED
), -EINVAL
);
191 link
->dhcp6_configured
= false;
193 if (link
->dhcp6_client
) {
194 r
= sd_dhcp6_client_get_information_request(link
->dhcp6_client
,
195 &information_request
);
197 log_link_warning_errno(link
, r
, "Could not get DHCPv6 Information request setting: %m");
201 if (information_request
&& event
!= SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_OTHER
) {
202 r
= sd_dhcp6_client_stop(link
->dhcp6_client
);
204 log_link_warning_errno(link
, r
, "Could not stop DHCPv6 while setting Managed mode: %m");
208 r
= sd_dhcp6_client_set_information_request(link
->dhcp6_client
,
211 log_link_warning_errno(link
, r
, "Could not unset DHCPv6 Information request: %m");
217 r
= sd_dhcp6_client_start(link
->dhcp6_client
);
218 if (r
< 0 && r
!= -EALREADY
) {
219 log_link_warning_errno(link
, r
, "Could not restart DHCPv6: %m");
224 link
->dhcp6_configured
= true;
229 r
= sd_dhcp6_client_new(&link
->dhcp6_client
);
233 r
= sd_dhcp6_client_attach_event(link
->dhcp6_client
, NULL
, 0);
237 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
238 (const uint8_t *) &link
->mac
,
239 sizeof (link
->mac
), ARPHRD_ETHER
);
243 r
= sd_dhcp6_client_set_index(link
->dhcp6_client
, link
->ifindex
);
247 r
= sd_dhcp6_client_set_callback(link
->dhcp6_client
, dhcp6_handler
,
252 if (event
== SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_OTHER
) {
253 r
= sd_dhcp6_client_set_information_request(link
->dhcp6_client
,
259 r
= sd_dhcp6_client_start(link
->dhcp6_client
);
266 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
270 static int dhcp6_prefix_expired(Link
*link
) {
272 sd_dhcp6_lease
*lease
;
273 struct in6_addr
*expired_prefix
, ip6_addr
;
274 uint8_t expired_prefixlen
;
275 uint32_t lifetime_preferred
, lifetime_valid
;
277 r
= sd_icmp6_ra_get_expired_prefix(link
->icmp6_router_discovery
,
278 &expired_prefix
, &expired_prefixlen
);
282 r
= sd_dhcp6_client_get_lease(link
->dhcp6_client
, &lease
);
286 log_link_info(link
, "IPv6 prefix "SD_ICMP6_ND_ADDRESS_FORMAT_STR
"/%d expired",
287 SD_ICMP6_ND_ADDRESS_FORMAT_VAL(*expired_prefix
),
290 sd_dhcp6_lease_reset_address_iter(lease
);
292 while (sd_dhcp6_lease_get_address(lease
, &ip6_addr
,
294 &lifetime_valid
) >= 0) {
296 r
= sd_icmp6_prefix_match(expired_prefix
, expired_prefixlen
,
301 log_link_info(link
, "IPv6 prefix length updated "SD_ICMP6_ND_ADDRESS_FORMAT_STR
"/%d", SD_ICMP6_ND_ADDRESS_FORMAT_VAL(ip6_addr
), 128);
303 dhcp6_address_update(link
, &ip6_addr
, 128, lifetime_preferred
, lifetime_valid
);
309 static void icmp6_router_handler(sd_icmp6_nd
*nd
, int event
, void *userdata
) {
310 Link
*link
= userdata
;
313 assert(link
->network
);
314 assert(link
->manager
);
316 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
320 case SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_NONE
:
323 case SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_TIMEOUT
:
324 case SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_OTHER
:
325 case SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_MANAGED
:
326 dhcp6_configure(link
, event
);
330 case SD_ICMP6_ND_EVENT_ROUTER_ADVERTISMENT_PREFIX_EXPIRED
:
331 if (!link
->rtnl_extended_attrs
)
332 dhcp6_prefix_expired(link
);
338 log_link_warning_errno(link
, event
, "ICMPv6 error: %m");
340 log_link_warning(link
, "ICMPv6 unknown event: %d", event
);
347 int icmp6_configure(Link
*link
) {
350 assert_return(link
, -EINVAL
);
352 r
= sd_icmp6_nd_new(&link
->icmp6_router_discovery
);
356 r
= sd_icmp6_nd_attach_event(link
->icmp6_router_discovery
, NULL
, 0);
360 r
= sd_icmp6_nd_set_mac(link
->icmp6_router_discovery
, &link
->mac
);
364 r
= sd_icmp6_nd_set_index(link
->icmp6_router_discovery
, link
->ifindex
);
368 r
= sd_icmp6_nd_set_callback(link
->icmp6_router_discovery
,
369 icmp6_router_handler
, link
);