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_information_acquired(sd_dhcp6_client
*client
,
36 static int dhcp6_address_handler(sd_rtnl
*rtnl
, sd_rtnl_message
*m
,
38 _cleanup_link_unref_ Link
*link
= userdata
;
43 r
= sd_rtnl_message_get_errno(m
);
44 if (r
< 0 && r
!= -EEXIST
) {
45 log_link_error(link
, "Could not set DHCPv6 address: %s",
48 link_enter_failed(link
);
51 link_rtnl_process_address(rtnl
, m
, link
->manager
);
56 static int dhcp6_address_update(Link
*link
, struct in6_addr
*ip6_addr
,
57 uint8_t prefixlen
, uint32_t lifetime_preferred
,
58 uint32_t lifetime_valid
) {
60 _cleanup_address_free_ Address
*addr
= NULL
;
62 r
= address_new_dynamic(&addr
);
66 addr
->family
= AF_INET6
;
67 memcpy(&addr
->in_addr
.in6
, ip6_addr
, sizeof(*ip6_addr
));
69 addr
->flags
= IFA_F_NOPREFIXROUTE
;
72 addr
->cinfo
.ifa_prefered
= lifetime_preferred
;
73 addr
->cinfo
.ifa_valid
= lifetime_valid
;
75 log_link_struct(link
, LOG_INFO
, "MESSAGE=%-*s: DHCPv6 address "SD_ICMP6_ADDRESS_FORMAT_STR
"/%d timeout preferred %d valid %d",
77 link
->ifname
, SD_ICMP6_ADDRESS_FORMAT_VAL(addr
->in_addr
.in6
),
78 addr
->prefixlen
, lifetime_preferred
, lifetime_valid
,
81 r
= address_update(addr
, link
, dhcp6_address_handler
);
83 log_link_warning(link
, "Could not assign DHCPv6 address: %s",
89 static int dhcp6_lease_address_acquired(sd_dhcp6_client
*client
, Link
*link
) {
91 sd_dhcp6_lease
*lease
;
92 struct in6_addr ip6_addr
;
93 uint32_t lifetime_preferred
, lifetime_valid
;
96 r
= sd_dhcp6_client_get_lease(client
, &lease
);
100 sd_dhcp6_lease_reset_address_iter(lease
);
102 while (sd_dhcp6_lease_get_address(lease
, &ip6_addr
,
104 &lifetime_valid
) >= 0) {
106 r
= sd_icmp6_ra_get_prefixlen(link
->icmp6_router_discovery
,
107 &ip6_addr
, &prefixlen
);
108 if (r
< 0 && r
!= -EADDRNOTAVAIL
) {
109 log_link_warning(link
, "Could not get prefix information: %s",
114 if (r
== -EADDRNOTAVAIL
)
117 r
= dhcp6_address_update(link
, &ip6_addr
, prefixlen
,
118 lifetime_preferred
, lifetime_valid
);
126 static void dhcp6_handler(sd_dhcp6_client
*client
, int event
, void *userdata
) {
128 Link
*link
= userdata
;
131 assert(link
->network
);
132 assert(link
->manager
);
134 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
138 case DHCP6_EVENT_STOP
:
139 case DHCP6_EVENT_RESEND_EXPIRE
:
140 case DHCP6_EVENT_RETRANS_MAX
:
141 log_link_debug(link
, "DHCPv6 event %d", event
);
144 case DHCP6_EVENT_IP_ACQUIRE
:
145 r
= dhcp6_lease_address_acquired(client
, link
);
147 link_enter_failed(link
);
152 case DHCP6_EVENT_INFORMATION_REQUEST
:
153 r
= dhcp6_lease_information_acquired(client
, link
);
155 link_enter_failed(link
);
163 log_link_warning(link
, "DHCPv6 error: %s",
166 log_link_warning(link
, "DHCPv6 unknown event: %d",
172 static int dhcp6_configure(Link
*link
, int event
) {
174 bool information_request
;
176 assert_return(link
, -EINVAL
);
178 if (link
->dhcp6_client
) {
179 if (event
!= ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED
)
182 r
= sd_dhcp6_client_get_information_request(link
->dhcp6_client
,
183 &information_request
);
185 log_link_warning(link
, "Could not get DHCPv6 Information request setting: %s",
188 sd_dhcp6_client_unref(link
->dhcp6_client
);
192 if (!information_request
)
195 r
= sd_dhcp6_client_set_information_request(link
->dhcp6_client
,
198 log_link_warning(link
, "Could not unset DHCPv6 Information request: %s",
201 sd_dhcp6_client_unref(link
->dhcp6_client
);
205 r
= sd_dhcp6_client_start(link
->dhcp6_client
);
207 log_link_warning(link
, "Could not restart DHCPv6 after enabling Information request: %s",
210 sd_dhcp6_client_unref(link
->dhcp6_client
);
217 r
= sd_dhcp6_client_new(&link
->dhcp6_client
);
221 r
= sd_dhcp6_client_attach_event(link
->dhcp6_client
, NULL
, 0);
223 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
227 r
= sd_dhcp6_client_set_mac(link
->dhcp6_client
,
228 (const uint8_t *) &link
->mac
,
229 sizeof (link
->mac
), ARPHRD_ETHER
);
231 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
235 r
= sd_dhcp6_client_set_index(link
->dhcp6_client
, link
->ifindex
);
237 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
241 r
= sd_dhcp6_client_set_callback(link
->dhcp6_client
, dhcp6_handler
,
244 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
248 if (event
== ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER
) {
249 r
= sd_dhcp6_client_set_information_request(link
->dhcp6_client
,
253 sd_dhcp6_client_unref(link
->dhcp6_client
);
258 r
= sd_dhcp6_client_start(link
->dhcp6_client
);
260 link
->dhcp6_client
= sd_dhcp6_client_unref(link
->dhcp6_client
);
265 static void icmp6_router_handler(sd_icmp6_nd
*nd
, int event
, void *userdata
) {
266 Link
*link
= userdata
;
269 assert(link
->network
);
270 assert(link
->manager
);
272 if (IN_SET(link
->state
, LINK_STATE_FAILED
, LINK_STATE_LINGER
))
276 case ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE
:
277 case ICMP6_EVENT_ROUTER_ADVERTISMENT_PREFIX_EXPIRED
:
280 case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT
:
281 case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER
:
282 case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED
:
283 dhcp6_configure(link
, event
);
289 log_link_warning(link
, "ICMPv6 error: %s",
292 log_link_warning(link
, "ICMPv6 unknown event: %d",
300 int icmp6_configure(Link
*link
) {
303 assert_return(link
, -EINVAL
);
305 r
= sd_icmp6_nd_new(&link
->icmp6_router_discovery
);
309 r
= sd_icmp6_nd_attach_event(link
->icmp6_router_discovery
, NULL
, 0);
313 r
= sd_icmp6_nd_set_mac(link
->icmp6_router_discovery
, &link
->mac
);
317 r
= sd_icmp6_nd_set_index(link
->icmp6_router_discovery
, link
->ifindex
);
321 r
= sd_icmp6_nd_set_callback(link
->icmp6_router_discovery
,
322 icmp6_router_handler
, link
);