1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright © 2017 Intel Corporation. All rights reserved.
6 #include <netinet/icmp6.h>
9 #include "networkd-address.h"
10 #include "networkd-manager.h"
11 #include "networkd-radv.h"
12 #include "parse-util.h"
14 #include "string-util.h"
16 int config_parse_router_prefix_delegation(
21 unsigned section_line
,
28 Network
*network
= userdata
;
37 if (streq(rvalue
, "static"))
38 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_STATIC
;
39 else if (streq(rvalue
, "dhcpv6"))
40 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_DHCP6
;
42 d
= parse_boolean(rvalue
);
44 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_BOTH
;
46 network
->router_prefix_delegation
= RADV_PREFIX_DELEGATION_NONE
;
49 log_syntax(unit
, LOG_ERR
, filename
, line
, -EINVAL
, "Router prefix delegation '%s' is invalid, ignoring assignment: %m", rvalue
);
55 int config_parse_router_preference(const char *unit
,
59 unsigned section_line
,
65 Network
*network
= userdata
;
73 if (streq(rvalue
, "high"))
74 network
->router_preference
= SD_NDISC_PREFERENCE_HIGH
;
75 else if (STR_IN_SET(rvalue
, "medium", "normal", "default"))
76 network
->router_preference
= SD_NDISC_PREFERENCE_MEDIUM
;
77 else if (streq(rvalue
, "low"))
78 network
->router_preference
= SD_NDISC_PREFERENCE_LOW
;
80 log_syntax(unit
, LOG_ERR
, filename
, line
, -EINVAL
, "Router preference '%s' is invalid, ignoring assignment: %m", rvalue
);
85 void prefix_free(Prefix
*prefix
) {
89 if (prefix
->network
) {
90 LIST_REMOVE(prefixes
, prefix
->network
->static_prefixes
, prefix
);
91 assert(prefix
->network
->n_static_prefixes
> 0);
92 prefix
->network
->n_static_prefixes
--;
95 hashmap_remove(prefix
->network
->prefixes_by_section
,
99 prefix
->radv_prefix
= sd_radv_prefix_unref(prefix
->radv_prefix
);
104 int prefix_new(Prefix
**ret
) {
105 _cleanup_(prefix_freep
) Prefix
*prefix
= NULL
;
107 prefix
= new0(Prefix
, 1);
111 if (sd_radv_prefix_new(&prefix
->radv_prefix
) < 0)
114 *ret
= TAKE_PTR(prefix
);
119 int prefix_new_static(Network
*network
, const char *filename
,
120 unsigned section_line
, Prefix
**ret
) {
121 _cleanup_(network_config_section_freep
) NetworkConfigSection
*n
= NULL
;
122 _cleanup_(prefix_freep
) Prefix
*prefix
= NULL
;
127 assert(!!filename
== (section_line
> 0));
130 r
= network_config_section_new(filename
, section_line
, &n
);
135 prefix
= hashmap_get(network
->prefixes_by_section
, n
);
137 *ret
= TAKE_PTR(prefix
);
144 r
= prefix_new(&prefix
);
149 prefix
->section
= TAKE_PTR(n
);
151 r
= hashmap_put(network
->prefixes_by_section
, prefix
->section
,
157 prefix
->network
= network
;
158 LIST_APPEND(prefixes
, network
->static_prefixes
, prefix
);
159 network
->n_static_prefixes
++;
161 *ret
= TAKE_PTR(prefix
);
166 int config_parse_prefix(const char *unit
,
167 const char *filename
,
170 unsigned section_line
,
177 Network
*network
= userdata
;
178 _cleanup_(prefix_freep
) Prefix
*p
= NULL
;
179 uint8_t prefixlen
= 64;
180 union in_addr_union in6addr
;
189 r
= prefix_new_static(network
, filename
, section_line
, &p
);
193 r
= in_addr_prefix_from_string(rvalue
, AF_INET6
, &in6addr
, &prefixlen
);
195 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Prefix is invalid, ignoring assignment: %s", rvalue
);
199 if (sd_radv_prefix_set_prefix(p
->radv_prefix
, &in6addr
.in6
, prefixlen
) < 0)
200 return -EADDRNOTAVAIL
;
202 log_syntax(unit
, LOG_INFO
, filename
, line
, r
, "Found prefix %s", rvalue
);
209 int config_parse_prefix_flags(const char *unit
,
210 const char *filename
,
213 unsigned section_line
,
219 Network
*network
= userdata
;
220 _cleanup_(prefix_freep
) Prefix
*p
= NULL
;
229 r
= prefix_new_static(network
, filename
, section_line
, &p
);
233 r
= parse_boolean(rvalue
);
235 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Failed to parse address flag, ignoring: %s", rvalue
);
241 if (streq(lvalue
, "OnLink"))
242 r
= sd_radv_prefix_set_onlink(p
->radv_prefix
, val
);
243 else if (streq(lvalue
, "AddressAutoconfiguration"))
244 r
= sd_radv_prefix_set_address_autoconfiguration(p
->radv_prefix
, val
);
253 int config_parse_prefix_lifetime(const char *unit
,
254 const char *filename
,
257 unsigned section_line
,
263 Network
*network
= userdata
;
264 _cleanup_(prefix_freep
) Prefix
*p
= NULL
;
274 r
= prefix_new_static(network
, filename
, section_line
, &p
);
278 r
= parse_sec(rvalue
, &usec
);
280 log_syntax(unit
, LOG_ERR
, filename
, line
, r
, "Lifetime is invalid, ignoring assignment: %s", rvalue
);
284 /* a value of 0xffffffff represents infinity */
285 if (streq(lvalue
, "PreferredLifetimeSec"))
286 r
= sd_radv_prefix_set_preferred_lifetime(p
->radv_prefix
,
287 DIV_ROUND_UP(usec
, USEC_PER_SEC
));
288 else if (streq(lvalue
, "ValidLifetimeSec"))
289 r
= sd_radv_prefix_set_valid_lifetime(p
->radv_prefix
,
290 DIV_ROUND_UP(usec
, USEC_PER_SEC
));
299 static int radv_get_ip6dns(Network
*network
, struct in6_addr
**dns
,
301 _cleanup_free_
struct in6_addr
*addresses
= NULL
;
302 size_t i
, n_addresses
= 0, n_allocated
= 0;
308 for (i
= 0; i
< network
->n_dns
; i
++) {
309 union in_addr_union
*addr
;
311 if (network
->dns
[i
].family
!= AF_INET6
)
314 addr
= &network
->dns
[i
].address
;
316 if (in_addr_is_null(AF_INET6
, addr
) ||
317 in_addr_is_link_local(AF_INET6
, addr
) ||
318 in_addr_is_localhost(AF_INET6
, addr
))
321 if (!GREEDY_REALLOC(addresses
, n_allocated
, n_addresses
+ 1))
324 addresses
[n_addresses
++] = addr
->in6
;
328 *dns
= TAKE_PTR(addresses
);
330 *n_dns
= n_addresses
;
336 static int radv_set_dns(Link
*link
, Link
*uplink
) {
337 _cleanup_free_
struct in6_addr
*dns
= NULL
;
339 usec_t lifetime_usec
;
342 if (!link
->network
->router_emit_dns
)
345 if (link
->network
->router_dns
) {
346 dns
= newdup(struct in6_addr
, link
->network
->router_dns
,
347 link
->network
->n_router_dns
);
351 n_dns
= link
->network
->n_router_dns
;
352 lifetime_usec
= link
->network
->router_dns_lifetime_usec
;
357 lifetime_usec
= SD_RADV_DEFAULT_DNS_LIFETIME_USEC
;
359 r
= radv_get_ip6dns(link
->network
, &dns
, &n_dns
);
364 if (uplink
->network
== NULL
) {
365 log_link_debug(uplink
, "Cannot fetch DNS servers as uplink interface is not managed by us");
369 r
= radv_get_ip6dns(uplink
->network
, &dns
, &n_dns
);
377 return sd_radv_set_rdnss(link
->radv
,
378 DIV_ROUND_UP(lifetime_usec
, USEC_PER_SEC
),
382 static int radv_set_domains(Link
*link
, Link
*uplink
) {
383 char **search_domains
;
384 usec_t lifetime_usec
;
386 if (!link
->network
->router_emit_domains
)
389 search_domains
= link
->network
->router_search_domains
;
390 lifetime_usec
= link
->network
->router_dns_lifetime_usec
;
395 lifetime_usec
= SD_RADV_DEFAULT_DNS_LIFETIME_USEC
;
397 search_domains
= link
->network
->search_domains
;
402 if (uplink
->network
== NULL
) {
403 log_link_debug(uplink
, "Cannot fetch DNS search domains as uplink interface is not managed by us");
407 search_domains
= uplink
->network
->search_domains
;
415 return sd_radv_set_dnssl(link
->radv
,
416 DIV_ROUND_UP(lifetime_usec
, USEC_PER_SEC
),
421 int radv_emit_dns(Link
*link
) {
425 uplink
= manager_find_uplink(link
->manager
, link
);
427 r
= radv_set_dns(link
, uplink
);
429 log_link_warning_errno(link
, r
, "Could not set RA DNS: %m");
431 r
= radv_set_domains(link
, uplink
);
433 log_link_warning_errno(link
, r
, "Could not set RA Domains: %m");
438 int radv_configure(Link
*link
) {
443 assert(link
->network
);
445 r
= sd_radv_new(&link
->radv
);
449 r
= sd_radv_attach_event(link
->radv
, NULL
, 0);
453 r
= sd_radv_set_mac(link
->radv
, &link
->mac
);
457 r
= sd_radv_set_ifindex(link
->radv
, link
->ifindex
);
461 r
= sd_radv_set_managed_information(link
->radv
, link
->network
->router_managed
);
465 r
= sd_radv_set_other_information(link
->radv
, link
->network
->router_other_information
);
469 /* a value of 0xffffffff represents infinity, 0x0 means this host is
471 r
= sd_radv_set_router_lifetime(link
->radv
,
472 DIV_ROUND_UP(link
->network
->router_lifetime_usec
, USEC_PER_SEC
));
476 if (link
->network
->router_lifetime_usec
> 0) {
477 r
= sd_radv_set_preference(link
->radv
,
478 link
->network
->router_preference
);
483 if (IN_SET(link
->network
->router_prefix_delegation
,
484 RADV_PREFIX_DELEGATION_STATIC
,
485 RADV_PREFIX_DELEGATION_BOTH
)) {
486 LIST_FOREACH(prefixes
, p
, link
->network
->static_prefixes
) {
487 r
= sd_radv_add_prefix(link
->radv
, p
->radv_prefix
, false);
488 if (r
!= -EEXIST
&& r
< 0)
493 return radv_emit_dns(link
);